Various types of
hoist gantry crane state detection and fault diagnosis of electronic technology applications and the development of electronic technology Wei maturing and advanced . By the relay , contactor auxiliary chain connector , limit switch indicator consisting of a simple fault detection developed to specifically fault diagnosis system . Especially in the modern port of bulk and container loading dock harbor cranes, automated handling systems with improved performance , lifting the growing complexity of loading and unloading operations in order to improve the efficiency and reliability of lifting machinery , maintenance and effective utilization , try lifting downtime rate is reduced to minimum. The past 10 years , at home and abroad continue to develop and apply the port handling system RAS ( reliability , effective utilization , maintenance ) overall performance of the technology . In the automation system using "distributed " means of control for each device to take measures to improve the overall performance of RAS . The
overhead gantry crane motor control system , the programmable logic controller (PC), the data transmission device and the velocity modulation of the three components are used rigorous diagnostic measures and monitoring software reliability . In the system design , set back-up facilities and specialized diagnostic equipment monitoring .
Crane fault diagnostic testing device uses a microprocessor for data acquisition and processing , to achieve the lifting equipment and wiring fault detection , diagnosis and management of job records . Loading bridge microcomputers and computer in the control room via fiber optic cable linking the data can be easily transmitted the communication of information and instructions . MCMS systems often detect electrical transmission line is normal , at any time of the electrical equipment of the analog signal and digital signal switching record , and the detected value and the normal value is compared to determine whether there is failure , if failure occurs in the driver's cab CRT on the display , while the display the results printed out. After a fault occurs , the rapid tracking and detection of point of failure where they are. From the CRT display can be seen at a glance time curve shows the point of failure. Also can put the life of the various components , replacement time , repair time storage, display, print out, providing maintenance and repair information
overhead bridge crane parts .
2013年8月30日星期五
Crane girder sinking cause analysis
Crane girder camber called girders sinking gradually decreases , that downward from the original camber produce permanent deformation. Below the level of the main beam provides permanent deformation called lower torsion . Girders sinking because of the following categories:
1, the structure of internal stress effects: hoist gantry crane metal structures exist in all parts of pulling in different directions , pressure and other stress . Fly these forces produced mainly in the manufacturing process of structural forces of deformation caused by assembling building . Further, since the welding process locally uneven heating , will result in contraction of the weld and surrounding metal , leading to the main girder residual internal stress , and thus the load under the action of the beam will have a great stress winner and cause permanent deformation. Structure residual stress , during use of the crane tends to homogenize even disappear constantly , causing the main beam of sinking.
2 , the use of irrational : the crane is within the specified conditions of use designed , for overload and other irrational use is not be considered. But a lot of use of units not pay enough attention to this long-term change in the type of work overload and use , as well as for dragging heavy objects , pulling anchor bolts and so on. According to the survey , many units of the crane is because of this irrational use damaged .
3 , unreasonable Repair : Since no master steel crane metal structure structural deformation caused by heating of the law, and therefore did not take measures to prevent deformation , the bridge on the cutting or welding , resulting in severe deformation of the main beam , in addition, take stage heating will cause the main beam inward lateral bending of the end beam heating , not only the end of the beam back to the deformation , and will affect the main beam deformation. Therefore, we should grasp the deformation of the metal structure to avoid heating the structure must when welding or cutting , as the case may be , to take measures to prevent deformation .
4 , High Impact: According to droop , thermal processing plant using a crane used crane than the cold floor of the main beam sinking phenomenon is more common, more severe degree of subsidence , such high temperatures are mostly caused by radiant heat . This is because the high temperature environment , to some extent, to reduce the yield strength of the metal material , on the other hand the high-temperature environment , thermal stress is generated , which increases the likelihood of sinking of the main beam . It is notable that , smelting radiant heat will cause the cover under the main beam temperature greatly exceeds the upper cover , the cover is to make thermal elongation greater than under the cover of thermal elongation , under the effect of the load leads to the main beam camber natural decrease. So, in a radiant heat environment using cranes, metal structure lower insulation measures should be increased to reduce the temperature of the metal structure.
5 , unreasonable lifting cranes , storage, transportation and installation of : crane bridge is raised structure, greater flexibility, unreasonable storage, transport , lifting and installation may cause deformation of the bridge structure . The use of the bridge gantry crane units should pay attention to proper use , abide by the rules and the necessary institutional , which prolong life and prevent the crane girders sinking is extremely important.
1, the structure of internal stress effects: hoist gantry crane metal structures exist in all parts of pulling in different directions , pressure and other stress . Fly these forces produced mainly in the manufacturing process of structural forces of deformation caused by assembling building . Further, since the welding process locally uneven heating , will result in contraction of the weld and surrounding metal , leading to the main girder residual internal stress , and thus the load under the action of the beam will have a great stress winner and cause permanent deformation. Structure residual stress , during use of the crane tends to homogenize even disappear constantly , causing the main beam of sinking.
2 , the use of irrational : the crane is within the specified conditions of use designed , for overload and other irrational use is not be considered. But a lot of use of units not pay enough attention to this long-term change in the type of work overload and use , as well as for dragging heavy objects , pulling anchor bolts and so on. According to the survey , many units of the crane is because of this irrational use damaged .
3 , unreasonable Repair : Since no master steel crane metal structure structural deformation caused by heating of the law, and therefore did not take measures to prevent deformation , the bridge on the cutting or welding , resulting in severe deformation of the main beam , in addition, take stage heating will cause the main beam inward lateral bending of the end beam heating , not only the end of the beam back to the deformation , and will affect the main beam deformation. Therefore, we should grasp the deformation of the metal structure to avoid heating the structure must when welding or cutting , as the case may be , to take measures to prevent deformation .
4 , High Impact: According to droop , thermal processing plant using a crane used crane than the cold floor of the main beam sinking phenomenon is more common, more severe degree of subsidence , such high temperatures are mostly caused by radiant heat . This is because the high temperature environment , to some extent, to reduce the yield strength of the metal material , on the other hand the high-temperature environment , thermal stress is generated , which increases the likelihood of sinking of the main beam . It is notable that , smelting radiant heat will cause the cover under the main beam temperature greatly exceeds the upper cover , the cover is to make thermal elongation greater than under the cover of thermal elongation , under the effect of the load leads to the main beam camber natural decrease. So, in a radiant heat environment using cranes, metal structure lower insulation measures should be increased to reduce the temperature of the metal structure.
5 , unreasonable lifting cranes , storage, transportation and installation of : crane bridge is raised structure, greater flexibility, unreasonable storage, transport , lifting and installation may cause deformation of the bridge structure . The use of the bridge gantry crane units should pay attention to proper use , abide by the rules and the necessary institutional , which prolong life and prevent the crane girders sinking is extremely important.
2013年8月29日星期四
Construction machinery industry has ended the high growth momentum
From 2011 the first seven months of construction machinery of the situation , the industry has ended the high growth momentum.
Although the growth rate of output ,sino hoist the construction machinery industry is still in the machinery manufacturing industry to maintain a high level, but with the rapid growth of the industry compared to 2010 , the growth rate has been greatly reduced. Meanwhile , construction machinery sales of several major products has grown from growth to decline in the rate of decline of individual products is still quite large.
Production and sales from April to enter the inflection point
From 2011 the monthly output of construction machinery industry point of view, in April this year reached a peak . According to the China Machinery Industry Federation data , from January to June of construction machinery industry output value of the month was 41.922 billion yuan , 36.428 billion yuan , 59.227 billion yuan , 64.873 billion yuan ,steel crane 57.398 billion yuan , 52.717 billion yuan . From this set of data, you can clearly see that from the beginning of April , the monthly output of the construction machinery industry began monthly decline , MoM decline were 11% and 8% .
From the China Construction Machinery Industry Association statistics, also reflects the same trend. However , the entire decline in a month ahead of time , from March began. China Construction Machinery Industry Association, key enterprises Group 2011 3 to 6 months of operating income was 49.2 billion yuan , 46.1 billion yuan , 37.2 billion yuan , 31.6 billion yuan . Operating income showed monthly decline, the decline MoM were 6 %, 19 %, 15% .
In addition, from the main product sales point of view, the first three months of this year , also increased month by month , but from the beginning of April , sales began to turn down , and showed a downward trend month by month . According to the China Construction Machinery Industry Association, 24 key enterprises of the industry statistics , the 2011 excavators , loaders , cranes three kinds of main products in June with March sales comparison can be found with only three months , three large variety of both sales decline of 50 % or more. Especially excavators, the decrease is as high as 77%. March sales of 39,989 units loaders , June to 19,240 units , a decrease of 51% ; March 6860 truck crane sales units, in June of 2718 units , a decrease of 60%. March excavator sales of 43,299 units in June of 9961 units , a decrease of 77%.
April entire construction machinery industry in 30 % of the decline in output , sales have declined substantially ,hoist gantry crane when it caused widespread concern in the industry , the industry concerned thus put forward the " inflection point ," said. Recalling the situation in the industry this year , April has indeed become the high point of the entire industry , even though the "turning point , said " It is not widely recognized , but the situation now , in April this high point has become increasingly clear , and very there may be maintained until the year.
Although the growth rate of output ,sino hoist the construction machinery industry is still in the machinery manufacturing industry to maintain a high level, but with the rapid growth of the industry compared to 2010 , the growth rate has been greatly reduced. Meanwhile , construction machinery sales of several major products has grown from growth to decline in the rate of decline of individual products is still quite large.
Production and sales from April to enter the inflection point
From 2011 the monthly output of construction machinery industry point of view, in April this year reached a peak . According to the China Machinery Industry Federation data , from January to June of construction machinery industry output value of the month was 41.922 billion yuan , 36.428 billion yuan , 59.227 billion yuan , 64.873 billion yuan ,steel crane 57.398 billion yuan , 52.717 billion yuan . From this set of data, you can clearly see that from the beginning of April , the monthly output of the construction machinery industry began monthly decline , MoM decline were 11% and 8% .
From the China Construction Machinery Industry Association statistics, also reflects the same trend. However , the entire decline in a month ahead of time , from March began. China Construction Machinery Industry Association, key enterprises Group 2011 3 to 6 months of operating income was 49.2 billion yuan , 46.1 billion yuan , 37.2 billion yuan , 31.6 billion yuan . Operating income showed monthly decline, the decline MoM were 6 %, 19 %, 15% .
In addition, from the main product sales point of view, the first three months of this year , also increased month by month , but from the beginning of April , sales began to turn down , and showed a downward trend month by month . According to the China Construction Machinery Industry Association, 24 key enterprises of the industry statistics , the 2011 excavators , loaders , cranes three kinds of main products in June with March sales comparison can be found with only three months , three large variety of both sales decline of 50 % or more. Especially excavators, the decrease is as high as 77%. March sales of 39,989 units loaders , June to 19,240 units , a decrease of 51% ; March 6860 truck crane sales units, in June of 2718 units , a decrease of 60%. March excavator sales of 43,299 units in June of 9961 units , a decrease of 77%.
April entire construction machinery industry in 30 % of the decline in output , sales have declined substantially ,hoist gantry crane when it caused widespread concern in the industry , the industry concerned thus put forward the " inflection point ," said. Recalling the situation in the industry this year , April has indeed become the high point of the entire industry , even though the "turning point , said " It is not widely recognized , but the situation now , in April this high point has become increasingly clear , and very there may be maintained until the year.
Construction machinery : Future Chinese excavator industry prospects
With the gradual recovery of the economy , the future prospects for excavator industry , due to road construction, real estate construction , railway construction and other fields directly stimulating the demand for excavators , excavator equipment space great market demand .hoist gantry crane In the global financial crisis, the domestic construction machinery industry has been affected to varying degrees , but our government subsequently introduced ten measures and invest 4 trillion yuan investment plan , once again shows the government to promote economic growth through increased investment in the determination is conducive to domestic demand for construction machinery . In four trillion investment plan to stimulate the construction machinery to restore growth , excavator industry will usher in the development of another spring .
Beginning in 2010 , with the gradual recovery of the economy , road construction, real estate construction, railway construction and other fields directly stimulating the demand for excavators .steel crane By the State to promote the large-scale infrastructure projects and real estate investment boom , the Chinese excavator market will be further growth .
Chinese excavator market decade average increase rate of 30% , has become one of the world 's largest market consumption . From the current situation , China is in road transport, energy water conservancy, urban construction and other aspects of infrastructure construction peak, excavator market demand increased year by year , the project market prospect. Excavator industry that is emerging of new products , contests . Among them, some companies have already occupied a large country in the excavator market , the introduction of new products aimed at consolidating the position , for enterprises to increase new growth points of interest ; Some enterprises in other areas, all-powerful , the introduction of new products in order to have the same field in the high position of excavator ; some companies with "foreign husband " power research and development of new products, aiming to enter the excavator market, improve the industrial chain, enhance competitiveness.
The country's macroeconomic data show that China's economic recovery is gaining momentum evident , urban fixed -asset investment for four consecutive months to maintain more than 30% growth ,bridge gantry crane real estate continued to pick up , PMI ( manufacturing purchasing managers index ) for five consecutive months 50% above the critical point , particularly domestic investment and rapid growth , directly contributing to the economic growth rate increased . This development directly enhance our understanding of the development of the excavator market expectations , China's excavator market has maintained a good momentum of development.
At present, China has become the world's largest excavator market , not only the largest sales market , and the yield is also the largest countries, is the world 's manufacturing center excavator industry . Continue to promote the internationalization of the process, China's excavator market is gradually being integrated into the global supply chain system excavator . As China 's influence in the international market continues to expand , especially in the increasingly close relations with developing countries in the global export market downturn , you can still get a lot for the excavator industry export opportunities .
Future prospects excavator industry , China is a vast , heavy task of economic construction , excavator market demand is very big. With the Midwest and Northeast regions to speed up economic development and construction projects increases, the demand for excavators will increase year by year .
Beginning in 2010 , with the gradual recovery of the economy , road construction, real estate construction, railway construction and other fields directly stimulating the demand for excavators .steel crane By the State to promote the large-scale infrastructure projects and real estate investment boom , the Chinese excavator market will be further growth .
Chinese excavator market decade average increase rate of 30% , has become one of the world 's largest market consumption . From the current situation , China is in road transport, energy water conservancy, urban construction and other aspects of infrastructure construction peak, excavator market demand increased year by year , the project market prospect. Excavator industry that is emerging of new products , contests . Among them, some companies have already occupied a large country in the excavator market , the introduction of new products aimed at consolidating the position , for enterprises to increase new growth points of interest ; Some enterprises in other areas, all-powerful , the introduction of new products in order to have the same field in the high position of excavator ; some companies with "foreign husband " power research and development of new products, aiming to enter the excavator market, improve the industrial chain, enhance competitiveness.
The country's macroeconomic data show that China's economic recovery is gaining momentum evident , urban fixed -asset investment for four consecutive months to maintain more than 30% growth ,bridge gantry crane real estate continued to pick up , PMI ( manufacturing purchasing managers index ) for five consecutive months 50% above the critical point , particularly domestic investment and rapid growth , directly contributing to the economic growth rate increased . This development directly enhance our understanding of the development of the excavator market expectations , China's excavator market has maintained a good momentum of development.
At present, China has become the world's largest excavator market , not only the largest sales market , and the yield is also the largest countries, is the world 's manufacturing center excavator industry . Continue to promote the internationalization of the process, China's excavator market is gradually being integrated into the global supply chain system excavator . As China 's influence in the international market continues to expand , especially in the increasingly close relations with developing countries in the global export market downturn , you can still get a lot for the excavator industry export opportunities .
Future prospects excavator industry , China is a vast , heavy task of economic construction , excavator market demand is very big. With the Midwest and Northeast regions to speed up economic development and construction projects increases, the demand for excavators will increase year by year .
Quick off the Chinese equipment manufacturing
The scale of China's equipment manufacturing industry has leapt to the world, including a number of enterprises to enter the world's leading ranks .overhead gantry crane Equipment manufacturing industry known as " the mother of industry " in the country to promote the industrialization process plays an important role . The rapid take-off of China's equipment manufacturing industry , thanks to the national strategy , the key is to take the road of innovation . The rapid take-off equipment manufacturing , manufacturing in China will shift from the manufacturing powerhouse to lay a solid foundation. Starting today , the newspaper launched the " quick take-off of China's equipment manufacturing industry ," a series of reports , analysis of China's equipment manufacturing rapid take-off path , in-depth interpretation of China 's successful experience in enterprise innovation and development , so stay tuned .
" The mother of industry " off significant
The rapid take-off of China's equipment manufacturing industry has become a worldwide topic. In July, a U.S. consulting firm released a research report , " Chinese equipment manufacturing enterprises in some areas have achieved rapid success , and now the world's top five companies , at least one is in China ."
In fact , as early as 2009 , China's machinery equipment industry sales have reached $ 1.5 trillion , more than Japan 's $ 1.2 trillion and U.S. $ 1 trillion , ranking first in the world .
Equipment manufacturing industry known as " the mother of industry ," is for the provision of technical equipment SECTOR strategic industries, industries associated with high , is the industry industrial upgrading , technological progress and an important guarantee for the concentrated expression of the comprehensive national strength . Chinese manufacturing power shift from manufacturing country ,overhead bridge crane we first need the equipment manufacturing industry to take off .
In today's world power and both are power equipment manufacturing industry in the process of industrialization rely on the equipment manufacturing industry led. Japan had called the electromechanical industry leading sectors of economic take-off , as the improvement of national welfare "engine industry ." 20th century, the rise of information technology, nuclear technology, space technology , and both are created through equipment manufacturing industry .
Effectiveness of China's industrial structure adjustment, industrial level smooth upgrade, which depends largely on whether the equipment manufacturing sectors of the national economy to provide advanced , complete technical equipment .
In the 21st century, the industrial countries will put more priority to developing the equipment manufacturing industry strategic position . In recent years , the United States and other industrialized countries the proportion of manufacturing equipment manufacturing accounted for more than 40% , the emerging industrial countries more than 30% , and showed a rising trend .
"Eleventh Five-Year" period, China's equipment manufacturing industry is developing rapidly. Ministry of Industry and Information Technology data show that from 2006 to 2010 , average annual growth rate of industrial added value of China's equipment more than 25% . In 2010, the country's total industrial added value the industry accounted for more than 9% of GDP , accounting for 19.35% of all industry .
From the size of the current point of view, China's equipment manufacturing industry has leapt to the world. In radio communications , solar panels , coal and other industries, China has a number of enterprises have entered the world leader in the column. Some foreign media that the challenger from China is reshaping the global industry structure ,steel crane made in China are climbing up the value chain .
In the October 18, 2010 release of " The State Council on accelerating the development and development of strategic emerging industries decision" to determine the high-end equipment manufacturing industry as China's current focus on fostering and development of strategic emerging industries, will develop into 2020 pillar industries.
" The mother of industry " off significant
The rapid take-off of China's equipment manufacturing industry has become a worldwide topic. In July, a U.S. consulting firm released a research report , " Chinese equipment manufacturing enterprises in some areas have achieved rapid success , and now the world's top five companies , at least one is in China ."
In fact , as early as 2009 , China's machinery equipment industry sales have reached $ 1.5 trillion , more than Japan 's $ 1.2 trillion and U.S. $ 1 trillion , ranking first in the world .
Equipment manufacturing industry known as " the mother of industry ," is for the provision of technical equipment SECTOR strategic industries, industries associated with high , is the industry industrial upgrading , technological progress and an important guarantee for the concentrated expression of the comprehensive national strength . Chinese manufacturing power shift from manufacturing country ,overhead bridge crane we first need the equipment manufacturing industry to take off .
In today's world power and both are power equipment manufacturing industry in the process of industrialization rely on the equipment manufacturing industry led. Japan had called the electromechanical industry leading sectors of economic take-off , as the improvement of national welfare "engine industry ." 20th century, the rise of information technology, nuclear technology, space technology , and both are created through equipment manufacturing industry .
Effectiveness of China's industrial structure adjustment, industrial level smooth upgrade, which depends largely on whether the equipment manufacturing sectors of the national economy to provide advanced , complete technical equipment .
In the 21st century, the industrial countries will put more priority to developing the equipment manufacturing industry strategic position . In recent years , the United States and other industrialized countries the proportion of manufacturing equipment manufacturing accounted for more than 40% , the emerging industrial countries more than 30% , and showed a rising trend .
"Eleventh Five-Year" period, China's equipment manufacturing industry is developing rapidly. Ministry of Industry and Information Technology data show that from 2006 to 2010 , average annual growth rate of industrial added value of China's equipment more than 25% . In 2010, the country's total industrial added value the industry accounted for more than 9% of GDP , accounting for 19.35% of all industry .
From the size of the current point of view, China's equipment manufacturing industry has leapt to the world. In radio communications , solar panels , coal and other industries, China has a number of enterprises have entered the world leader in the column. Some foreign media that the challenger from China is reshaping the global industry structure ,steel crane made in China are climbing up the value chain .
In the October 18, 2010 release of " The State Council on accelerating the development and development of strategic emerging industries decision" to determine the high-end equipment manufacturing industry as China's current focus on fostering and development of strategic emerging industries, will develop into 2020 pillar industries.
2013年8月28日星期三
Tower crane rental market boom tower crane industry successfully saved
As the world's largest producer of the tower crane , tower crane , not only in our country has achieved good sales results,steel crane the tower crane rental market has been the development and prosperity . Especially in the last year of construction machinery industry downturn , the loan market has not been affected , the gradual recovery of the industry in the current context , our tower crane rental market is extremely strong .
Statistics show that as early as 2002, China is the world's first tower crane annual production exceeded 1 million units Country, to become the world 's largest producer of the tower crane . At present , China's output of enterprises tower crane construction not only meet the domestic demand , but also are exported to Europe, America and other developed countries and regions. As of the end of September 2011 ,hoist gantry crane total exports of tower cranes 1703 , with a total amount of $ 240 million .
Tower crane industry benefited from the development of successive adjustments of domestic economic growth, and this context large infrastructure continue to be launched , including rail transportation, building construction, energy and water conservation , and so many aspects of engineering . And this year, the country 's urbanization gradually expand and accelerate the development , the development of the tower crane gave another massive new blue ocean. Can be said that China tower crane market prospects, are long-term bullish .
It is particularly worth mentioning is that , even in the last year, China's construction machinery industry is facing negative growth , the tower crane market has managed to avoid this fate. This is mainly because of the tower crane market structure of the credit , because the price is usually higher , largely hindered ability to buy small needs, these needs have been met through leasing instead , making China tower crane market is actually made purchase and lease of two parts , but the proportion is much higher than other leasing of construction machinery products. In the slow economic recovery , funds are tight circumstances, buy tower crane market is further transformed into the rental market , so the overall market in terms of the impact on the tower crane is not large , which is the tower crane market in the context of shrinking industry in general under the unique cause.
Our tower crane rental market has been able to successfully save the tower crane industry , the main interest in the leasing industry sound system , because the tower crane tower crane rental not stop at the level of leasing , and ranging from sino hoist leasing , installation, use, maintenance , etc. provide high quality services in all aspects . Recommendations tower crane rental companies to increase production and hire market attention , to further improve the existing rental service industry chain , the maximum to meet customer needs, in a competitive market slice.
Statistics show that as early as 2002, China is the world's first tower crane annual production exceeded 1 million units Country, to become the world 's largest producer of the tower crane . At present , China's output of enterprises tower crane construction not only meet the domestic demand , but also are exported to Europe, America and other developed countries and regions. As of the end of September 2011 ,hoist gantry crane total exports of tower cranes 1703 , with a total amount of $ 240 million .
Tower crane industry benefited from the development of successive adjustments of domestic economic growth, and this context large infrastructure continue to be launched , including rail transportation, building construction, energy and water conservation , and so many aspects of engineering . And this year, the country 's urbanization gradually expand and accelerate the development , the development of the tower crane gave another massive new blue ocean. Can be said that China tower crane market prospects, are long-term bullish .
It is particularly worth mentioning is that , even in the last year, China's construction machinery industry is facing negative growth , the tower crane market has managed to avoid this fate. This is mainly because of the tower crane market structure of the credit , because the price is usually higher , largely hindered ability to buy small needs, these needs have been met through leasing instead , making China tower crane market is actually made purchase and lease of two parts , but the proportion is much higher than other leasing of construction machinery products. In the slow economic recovery , funds are tight circumstances, buy tower crane market is further transformed into the rental market , so the overall market in terms of the impact on the tower crane is not large , which is the tower crane market in the context of shrinking industry in general under the unique cause.
Our tower crane rental market has been able to successfully save the tower crane industry , the main interest in the leasing industry sound system , because the tower crane tower crane rental not stop at the level of leasing , and ranging from sino hoist leasing , installation, use, maintenance , etc. provide high quality services in all aspects . Recommendations tower crane rental companies to increase production and hire market attention , to further improve the existing rental service industry chain , the maximum to meet customer needs, in a competitive market slice.
Metallurgical machinery industry on the demand outlook for the gearhead
Metallurgical machinery industry on the demand outlook for the gearhead
Prospects Industry Research Institute released the "2013-2017 China Market Outlook reducer industry strategic planning and investment analysis report" analysis, steel crane "Twelve Five" period, the national macro-control under the guidance of the steel industry will strictly control the total production capacity speed up elimination of outdated production capacity, strict control of new capacity. Iron and steel industry has experienced long-term extensive expansion, the urgent need to accelerate structural adjustment and industrial upgrading,hoist gantry crane and this adjustment to the metallurgical heavy machinery manufacturing, especially high levels of high-end equipment manufacturing industry challenges, it also brings market opportunities . Overall, the opportunities outweigh the challenges, "Twelve Five" period of environmental protection and large efficient steel smelting equipment will usher in a new round of rapid growth. As an important accessory products metallurgical equipment, metallurgical equipment gear in demand will be effectively pulling.
Conclusion
Combined with the above analysis, prospective Industry Research Institute released the "2013-2017 China Market Outlook reducer industry strategic planning and investment analysis report" predict, "Twelve Five" period,bridge gantry crane China gear industry will continue to maintain a rapid growth momentum. 2003-2012 reducer combination of industry development trend and domestic macroeconomic trends, is expected to "Twelve Five" period, China gear industry will achieve an average annual growth rate of over 10%, to 2017 income scale reducer industry will exceed 100 billion yuan.
2013年8月27日星期二
When transporting girder beam carrier safety inspections
With the adjustment of national policies, accelerate infrastructure construction, the construction of the railway bridge,sino hoist the rapid increase in the number of highway bridges, girder vehicle in such construction projects increasing demand, then beam carrier girder need to pay attention to what security checks it, because girder car body is relatively large, the way must be cautious in the girder, a small mistake can cause the body might capsize, personnel casualties. In order to effectively prevent accidents, accident prone areas for strict checks:
First check whether the beam carrier qualification units issued Zhunyongzheng; job site where a safety hazard identification, full-time staff monitoring; checking the status of the road surface must be dry and free of oil, flat cement, asphalt and compaction hoist gantry crane graded pavement.
Followed by transporting girder vehicle checks before commissioning, such as: emergency switch is working properly, the tire pressure up to standard, wire rope is not damaged; trial run of the indicator, device, system working properly; mounted on the beam, the beam position accurately fitted, working pressure within the normal range.
Finally, with the bridge machine with the process, transporting girder vehicle parking position and the distance to the overhead bridge crane within the limits prescribed, girder trolley car girder erecting machine the day before yesterday with the car speed synchronization.
First check whether the beam carrier qualification units issued Zhunyongzheng; job site where a safety hazard identification, full-time staff monitoring; checking the status of the road surface must be dry and free of oil, flat cement, asphalt and compaction hoist gantry crane graded pavement.
Followed by transporting girder vehicle checks before commissioning, such as: emergency switch is working properly, the tire pressure up to standard, wire rope is not damaged; trial run of the indicator, device, system working properly; mounted on the beam, the beam position accurately fitted, working pressure within the normal range.
Finally, with the bridge machine with the process, transporting girder vehicle parking position and the distance to the overhead bridge crane within the limits prescribed, girder trolley car girder erecting machine the day before yesterday with the car speed synchronization.
Out scandal customized crane continuously supplied to the Indian market
Dependent on government investment in a major market, Colgate coal quota scandal impede capital inflows. Although the 2012 growth rate of sales decline, but Will North found bC India exhibition, the
steel crane industry is still a steady stream to the Indian market to provide tailor-made cranes.
Indian bridge gantry crane industry with other industries in the country is very similar, relying on the central government's fiscal expenditure driven. Therefore, once the government financial difficulties, the whole of India's economic engine stalled due to lack of fuel.
To production of ACE is India's largest manufacturers of cranes, accounting for all types of market share mobile cranes and tower cranes 52% market share by 40%. Its production hoist traveling crane is the national individual dragging on the site a tapestry. Corporate Affairs Department Kiran Bhandari said: "We hoist gantry crane 20-30% sold privately Builders and Contractors, the rest are sold to government programs."
This situation is the same foreign manufacturers. Terex India sales and service director Martin Siebert said: "To some extent, everything depends on government spending to run many projects, especially infrastructure, electricity and oil refining projects, are relying on government driven. "
Indian bridge gantry crane industry with other industries in the country is very similar, relying on the central government's fiscal expenditure driven. Therefore, once the government financial difficulties, the whole of India's economic engine stalled due to lack of fuel.
To production of ACE is India's largest manufacturers of cranes, accounting for all types of market share mobile cranes and tower cranes 52% market share by 40%. Its production hoist traveling crane is the national individual dragging on the site a tapestry. Corporate Affairs Department Kiran Bhandari said: "We hoist gantry crane 20-30% sold privately Builders and Contractors, the rest are sold to government programs."
This situation is the same foreign manufacturers. Terex India sales and service director Martin Siebert said: "To some extent, everything depends on government spending to run many projects, especially infrastructure, electricity and oil refining projects, are relying on government driven. "
2013年8月25日星期日
Lifting machinery industry in 2015 is expected to pick up a full recovery
Lifting machinery industry in China has experienced nearly a decade "blowout" type of development, the whole industry has entered a production contract, revenue fell cycles.bridge gantry crane Yangshu Yan said: "In fact, starting in 2010, the industry has begun crane shot down, and gradually into a low-profit era, to the winter of 2012, the industry has come."
2013 lifting machinery industry growth slowed further, many crane companies in the homogenization of serious competitive environment difficult. Lifting industry in China has a "barometer" of the Chinese crane hometown in Henan Province Changyuan, past busy, machines roaring situation no longer exists, lack of factory orders, production team layoffs have become a common phenomenon industry . Funding strand breaks is very difficult for many companies in the brink of life and death. 2013 a quarter of the entire industry output profits fell nearly 60%.
Yang Shuyan analysis that led to the first quarter of 2013,hoist gantry crane corporate sales and revenue both fell mainly due to weak industry demand, but in the back of weak demand, not just domestic fixed asset investment growth and a decline in the real estate market five new national policy impact, but also the entire country in 2012 a continuation of the equipment manufacturing industry downturn.
Lifting machinery industry over the last golden years, gave birth to the rise of a number of leading enterprises, but the excessive pursuit of speed and scale also resulted in overcapacity, irrational structure, product homogeneity, etc. invisible injury, this situation is growing stagnant 2012 annual performance is very obvious to the industry caused a lot of pressure. Enter 2013 in the enterprise revenue decline, the market demand slowdown Yan Chun situation, Changyuan also from the government level, the use of the visible hand pushing business strategic restructuring, guide enterprises to adjust product structure, promote the healthy development of the whole industry a reasonable .
In fact, some industry experts are not optimistic about the crane industry placanticline internal reorganization, because different companies kneaded together, sheer scale merger may not be able to achieve optimal results. Large enterprises and groups requires companies endogenous development and growth, rather than a simple merger and reorganization. Yangshu Yan said: for the entire industry, lifting, walking industrial upgrading, product upgrading, technological innovation, marketing model innovation is stronger placanticline crane industry and the country's key.
In the context of global economic restructuring, lifting machinery industry development trend of slowdown is inevitable. China's manufacturing purchasing managers index (PMI) 2013 年 4 Index for was 50.6, down 0.30%, which we analysts believe that the industry is still in the stage of stabilization row irresolute. At what time it comes to lifting industry can really pick up when Yangshu Yan analysis, the future lies in integration and opportunities for more innovative marketing model. At present, the Chinese steel crane industry is still relatively extensive mode of development, technological innovation capability is weak, low value-added products, the overall big but not strong, the real recovery in the industry should be in the end of 2015.
How quickly achieve industrial transformation and upgrading, smoothly through the downturn adjustment period? How in the future market competition in the next round to seize the high ground, the entire lifting industry in the future development process need to solve the primary problem. "
2013 lifting machinery industry growth slowed further, many crane companies in the homogenization of serious competitive environment difficult. Lifting industry in China has a "barometer" of the Chinese crane hometown in Henan Province Changyuan, past busy, machines roaring situation no longer exists, lack of factory orders, production team layoffs have become a common phenomenon industry . Funding strand breaks is very difficult for many companies in the brink of life and death. 2013 a quarter of the entire industry output profits fell nearly 60%.
Yang Shuyan analysis that led to the first quarter of 2013,hoist gantry crane corporate sales and revenue both fell mainly due to weak industry demand, but in the back of weak demand, not just domestic fixed asset investment growth and a decline in the real estate market five new national policy impact, but also the entire country in 2012 a continuation of the equipment manufacturing industry downturn.
Lifting machinery industry over the last golden years, gave birth to the rise of a number of leading enterprises, but the excessive pursuit of speed and scale also resulted in overcapacity, irrational structure, product homogeneity, etc. invisible injury, this situation is growing stagnant 2012 annual performance is very obvious to the industry caused a lot of pressure. Enter 2013 in the enterprise revenue decline, the market demand slowdown Yan Chun situation, Changyuan also from the government level, the use of the visible hand pushing business strategic restructuring, guide enterprises to adjust product structure, promote the healthy development of the whole industry a reasonable .
In fact, some industry experts are not optimistic about the crane industry placanticline internal reorganization, because different companies kneaded together, sheer scale merger may not be able to achieve optimal results. Large enterprises and groups requires companies endogenous development and growth, rather than a simple merger and reorganization. Yangshu Yan said: for the entire industry, lifting, walking industrial upgrading, product upgrading, technological innovation, marketing model innovation is stronger placanticline crane industry and the country's key.
In the context of global economic restructuring, lifting machinery industry development trend of slowdown is inevitable. China's manufacturing purchasing managers index (PMI) 2013 年 4 Index for was 50.6, down 0.30%, which we analysts believe that the industry is still in the stage of stabilization row irresolute. At what time it comes to lifting industry can really pick up when Yangshu Yan analysis, the future lies in integration and opportunities for more innovative marketing model. At present, the Chinese steel crane industry is still relatively extensive mode of development, technological innovation capability is weak, low value-added products, the overall big but not strong, the real recovery in the industry should be in the end of 2015.
How quickly achieve industrial transformation and upgrading, smoothly through the downturn adjustment period? How in the future market competition in the next round to seize the high ground, the entire lifting industry in the future development process need to solve the primary problem. "
Tower crane industry requires multilateral cooperation
Tower crane from the current industry size, growth rate, favorable policies such as the development trend, SMEs should actively develop product technology, optimizing product mix, cultivate brand value. In the information technology development today, the tower
overhead gantry crane business in ensuring the quality of products, you should seek a balance can promote the sales network of sales and output path.
Lifting equipment factory store that the tower crane industry needs multilateral cooperation, especially as such a professional factory store electronic business platform of cooperation. Small tower crane companies should enhance its strength in the ups and actively participate in trade shows and factory store activities and accurate understanding of their own position, competition in the market continue to explore the development of mechanisms to obtain deserved market share.
Has been completed. So both long-term planning is obviously difficult to meet the national highway traffic development needs. In order to better support the economic and social development,steel crane to adapt to a comprehensive well-off society and modernization requirements, the need for our trunk highway construction plan long-term development strategy, from the top on the design.
Thus, from a strategic point of view to the preparation and the top of the national road network planning is very necessary and very urgent. It reflects the development of the objective requirements of road traffic should be said that the preparation and introduction of the "planning", both to solve China's road traffic, in particular trunk highway transportation development process of the emergence of some practical problems, while also guiding the country road transport, especially long-term development trunk road transport has a strategic significance, so I thought, "planning" in the background and necessity is very important.
On the effective convergence problems that we have been committed for this "planning" process is a matter of concern, as it has always been an important issue throughout the planning process. Because road transport is the entire basis of an integrated transport system in the strongest modes of transport, providing a full range of door to door, the whole connection points, lines and transportation modes. In addition to basic addition, but it is also and railways and inland waterways and waterways of the main channel to work together to jointly form a main road, the main channel of the integrated transport function, so when in the preparation of this plan, put it in an integrated transport system backdrop to the requirements of building an integrated transport system to plan it, which is always our goal,hoist gantry crane grasp and focus.
Daidong Chang said, "planning" to build itself to develop effective integrated transport system is a major decision, mentioned the planning process, but in recent years we have noticed, the state has issued a coastal port planning, inland shipping and aviation and long-term planning planning. Long-term planning of the railway in recent years has made some adjustments. In this case, to adapt to the development of road transport, in particular with the construction of the modern transportation system to match only at the planning level for timely adjustment and improvement in order to better serve the construction of an integrated transport system.
In the "National Highway Network Plan" and a series of special programs under the guidance of highway, road traffic in the future be better able to play to their strengths, to better serve the overall transportation system construction and development.
Lifting equipment factory store that the tower crane industry needs multilateral cooperation, especially as such a professional factory store electronic business platform of cooperation. Small tower crane companies should enhance its strength in the ups and actively participate in trade shows and factory store activities and accurate understanding of their own position, competition in the market continue to explore the development of mechanisms to obtain deserved market share.
Has been completed. So both long-term planning is obviously difficult to meet the national highway traffic development needs. In order to better support the economic and social development,steel crane to adapt to a comprehensive well-off society and modernization requirements, the need for our trunk highway construction plan long-term development strategy, from the top on the design.
Thus, from a strategic point of view to the preparation and the top of the national road network planning is very necessary and very urgent. It reflects the development of the objective requirements of road traffic should be said that the preparation and introduction of the "planning", both to solve China's road traffic, in particular trunk highway transportation development process of the emergence of some practical problems, while also guiding the country road transport, especially long-term development trunk road transport has a strategic significance, so I thought, "planning" in the background and necessity is very important.
On the effective convergence problems that we have been committed for this "planning" process is a matter of concern, as it has always been an important issue throughout the planning process. Because road transport is the entire basis of an integrated transport system in the strongest modes of transport, providing a full range of door to door, the whole connection points, lines and transportation modes. In addition to basic addition, but it is also and railways and inland waterways and waterways of the main channel to work together to jointly form a main road, the main channel of the integrated transport function, so when in the preparation of this plan, put it in an integrated transport system backdrop to the requirements of building an integrated transport system to plan it, which is always our goal,hoist gantry crane grasp and focus.
Daidong Chang said, "planning" to build itself to develop effective integrated transport system is a major decision, mentioned the planning process, but in recent years we have noticed, the state has issued a coastal port planning, inland shipping and aviation and long-term planning planning. Long-term planning of the railway in recent years has made some adjustments. In this case, to adapt to the development of road transport, in particular with the construction of the modern transportation system to match only at the planning level for timely adjustment and improvement in order to better serve the construction of an integrated transport system.
In the "National Highway Network Plan" and a series of special programs under the guidance of highway, road traffic in the future be better able to play to their strengths, to better serve the overall transportation system construction and development.
To the rational development of tower cranes
Nevertheless, since the tower
hoist gantry crane and construction industry and economic development are closely related, the tower crane industry for quite a long period of time is still the market. Therefore, our tower crane industry wants rational development, first we should abandon the price war. Only companies with a superior product safety and reliability in order to continuously expand the market space, optimizing industrial structure, secured market and get more development resources and technical sources.
Long-term, our tower crane market is still inseparable from the orderly development of policy guidance and support.sino hoist Relevant departments should play a guiding role in science, focused on solving the tower crane industry overcapacity, technology upgrades and other policies have practical significance. After all, the lack of appropriate norms for guidance, the huge market opportunities or industry,overhead bridge crane it may be a crisis, after all, can not make good policy to become the tower crane market a "narcotic."
Long-term, our tower crane market is still inseparable from the orderly development of policy guidance and support.sino hoist Relevant departments should play a guiding role in science, focused on solving the tower crane industry overcapacity, technology upgrades and other policies have practical significance. After all, the lack of appropriate norms for guidance, the huge market opportunities or industry,overhead bridge crane it may be a crisis, after all, can not make good policy to become the tower crane market a "narcotic."
The future development of the tower crane industry roadmap
Ministry of Transport Chief Planner Daidong Chang in a recent State Council Information Office, "National Highway Network Plan (2013 - 2030)" press conference that the national highway network has been completed 78.5 percent, "five" basically completed weekend .
Daidong Chang said that the reform and opening up, China has promulgated three national trunk highway planning.hoist gantry crane These three plans for the construction of highway traffic, especially in the construction of trunk roads, has played a key role. Effectively guided the country's main highway traffic fast and orderly development.
In fact, the implementation and planning through three years of reform and opening up the rapid development of highway transportation construction, achieved by the initial road traffic serious lag, bottlenecks in the state, toward the basic relief to the basic adaptation of historic change, this change effectively support the rapid development of our economy and society. However, with the economic and social development, China's road network planning and construction has made great achievements in the same time, there have been some new contradictions and problems.
First mentioned in 1981, the original formulation of the old national road network planning, is a pilot program, in fact, has done 30 years basically no major adjustments, a local fine-tuning. After these 30 years of highway construction, development, especially in the construction of highways, originally a section of national highway network is occupied, there are some sections of functionality in a recession, no longer meet the original position, adjust as needed. In addition, after these 30 years, the original national road network becomes discontinuous, incomplete.bridge gantry crane There is also a big problem, is that it's a serious shortage of coverage, there are more than 900 counties, our national highway no coverage.
Secondly, the three plans, two of which are the main trunk of the plan, a national trunk road is planning a national highway network planning. Some planning has been basically completed, such as the planning of national trunk road a few years ago has been completed, "7918" national highway network planning has completed 78.8 percent, has been largely under construction, according to our national goals, in the "twelve Five "basically complete. This is a situation, but also the future needs of the main trunk road construction development, from planning a long-term guidance.
The highway has been built, especially in the early emergence of highway construction suited to the situation, some of the serious shortage of channel capacity, the highway on new urban population of more than 200,000 city is not completely covered, 29 prefecture-level administrative center there is no connection, the importance of which is connected nodes and objects.
Overall, the original three national-level planning, phased construction of the more obvious characteristics. Are faced with a pressing need revision and adjustment. Just mentioned that the plan did not adjust more than 30 years, most of the latter two plans following the factory store on June 4 announced first-quarter sales figures double down the steel crane fell, and did not affect the tower crane market demand slowed. But this does not mean that China tower crane industry has entered a sunny, but requires companies to think about the future tower crane depth development of the industry roadmap.
Excavators, cranes, etc. in the first quarter sales fell 20%
Since the second half of 2012, subject to the impact of falling real estate investment growth, concrete machinery sales began to decline until 2013 a quarter has not improved. From sales data, excavators,
overhead bridge crane and other products in a quarter, about 20% in sales volume decline. Sluggish downstream demand, accounts receivable bad debt problems of the company tightened conditions of sale, profits are at a greater impact.
However, after entering the second quarter will accelerate investment in infrastructure,overhead gantry crane two quarters of recovery is expected to remain the industry. March 2013 to excavators, loaders, represented by sales of construction machinery product range has been narrowed down to about 5%. 2 quarter,steel crane with investment in infrastructure and the market is expected to accelerate the improvement of growth in sales of construction machinery is expected to remain.
However, after entering the second quarter will accelerate investment in infrastructure,overhead gantry crane two quarters of recovery is expected to remain the industry. March 2013 to excavators, loaders, represented by sales of construction machinery product range has been narrowed down to about 5%. 2 quarter,steel crane with investment in infrastructure and the market is expected to accelerate the improvement of growth in sales of construction machinery is expected to remain.
Crane industry shortage (a) products of varying quality.
At present, a large tower crane production, in all ways to the healthy development, with brand awareness and sales network, tower
hoist gantry crane standards are closer to international standards, and gradually improve. But the product quality is uneven, a big difference. Some products with advanced technology, better quality, and some products are there are more design, manufacturing and other quality problems, this is because the production of corporate design and production levels disparities. In part, the strength of technology, product quality assurance of well-known enterprises; some process equipment, technical strength is poor,bridge gantry crane with low price and non-formal means into the market to non-formal means to obtain a manufacturing license and the supervisory inspection certificate, the formal manufacturers enormous impact.
With the building boom, a lot of small and medium construction enterprises came into being, because funds are not strong, the lack of long-term planning, risk purchase low-tech, high-quality cheap tower steel crane, coupled with poor management, to production of safe construction leaving a huge risk.
With the building boom, a lot of small and medium construction enterprises came into being, because funds are not strong, the lack of long-term planning, risk purchase low-tech, high-quality cheap tower steel crane, coupled with poor management, to production of safe construction leaving a huge risk.
2013年8月22日星期四
Crane's position in the national economy analysis
Material Handling in the entire national economy has a very important position. Improve production efficiency
bridge gantry crane to ensure safe reliability, reduce material handling cost is important.
According to statistics, in the United States, per 100 yuan of industrial finished products, and material handling costs from $ 20-25 to account for the U.S. factory production process used in material handling work for 80% of total production cycle.
United Kingdom each year for plant and site material handling cost up to one billion pounds' bow when the right foot national wage expenditures ninth. In 1974, the British industrial material handling costs under the Ministry of the word good investigation committee to investigate the company for 30 and said: "inter-process material handling costs account for more than 12% processing fee, if coupled processes inside and outside the factory handling costs the cost is estimated to reach 20% -25%.
Germany Demag company had done a detailed investigation confirmed material handling costs account for 45% of the costs of production (30% of inter-process material handling, process material handling costs within 15%.)
Plant of Dongfeng Motor also some statistics, automotive parts in the plant's processing time only 5%,overhead gantry crane other 95% of man-hours were used in the handling and storage being. 1t products should produce material hoist 50t times, producing castings 1t to 80t handling times, the production capacity of Dongfeng Motor plant scheduled to 100,000, material handling equipment accounted for much of the total equipment.
Thus seen as an important component of material handling equipment steel crane s requirement is very impressive, lifting machinery industry has a broad prospect.
According to statistics, in the United States, per 100 yuan of industrial finished products, and material handling costs from $ 20-25 to account for the U.S. factory production process used in material handling work for 80% of total production cycle.
United Kingdom each year for plant and site material handling cost up to one billion pounds' bow when the right foot national wage expenditures ninth. In 1974, the British industrial material handling costs under the Ministry of the word good investigation committee to investigate the company for 30 and said: "inter-process material handling costs account for more than 12% processing fee, if coupled processes inside and outside the factory handling costs the cost is estimated to reach 20% -25%.
Germany Demag company had done a detailed investigation confirmed material handling costs account for 45% of the costs of production (30% of inter-process material handling, process material handling costs within 15%.)
Plant of Dongfeng Motor also some statistics, automotive parts in the plant's processing time only 5%,overhead gantry crane other 95% of man-hours were used in the handling and storage being. 1t products should produce material hoist 50t times, producing castings 1t to 80t handling times, the production capacity of Dongfeng Motor plant scheduled to 100,000, material handling equipment accounted for much of the total equipment.
Thus seen as an important component of material handling equipment steel crane s requirement is very impressive, lifting machinery industry has a broad prospect.
The direction of development of the domestic crane
(1) Improved lifting structure to reduce weight
Cranes and more domestic computer optimized design has been adopted, in order to improve the machine's technical performance and reduce weight, and in this context as far as possible the new structure. If 5 ~ 50t overhead bridge crane used in semi-generic off-track main beam structure, compared with the track box girder can be reduced or eliminated in the small girder stiffened plate, canceled short stiffened plate, reducing structural weight, saving processing time. Currently the national Spark Program proposed bridge using four split structure is not high, making it the same with the ordinary crane lifting height, the plant can be reduced corbel elevation 1.5m; two ends of the main beam is placed end of the beam, with high strength bolts connecting; wheel tread height drop as a result, will make the plant corbels elevation drop. In the role of the vertical wheel load, the calculation of the column height reduction, to reduce the capital cost plant, plant life increases.
(2) to large-scale development
Since the state tournament source two qe two wide attention and funding the construction of many large and medium hydropower turbines is growing. Especially in the construction of the Three Gorges project requirements for large overhead gantry crane rising rapidly. Three Gorges Project main plant installed two 1200/125t bridge crane, equipped with a large tower crane 2000t. Currently in the construction of large and medium-sized hydropower stations, there are many, such as Yantan, Longtan, GEHEYAN, Fujian outlet power stations; There are many nuclear power plants and large and medium-sized power plants need to build, it can be expected, large tonnage High Performance cranes requirement is very large and broad prospects.
(3) to fully absorb foreign advanced technology
Crane size car run institutions of the German demag company's "triple play" drives, hanging on the end of the beam inside, it is not under the main beam deflection and vibration, improved operational performance and life institutions, and to structure Compact, beautiful appearance, easy installation and maintenance. With the domestic machining capabilities, so that carts end beam and small frame overall boring as possible, and thus split and wheels 45 degrees or cylindrical bearing housing will likely replace the angular bearing box, mounted on axle hole on the axle centerline and end beam centerline constitute the standard 90 degrees, so the horizontal and vertical deflection of the wheels can be strictly controlled within prescribed limits, to avoid the phenomenon of eating track. Due to the small frame is a bore formed after welding, hole center line of the four wheels in the same plane, the three-point landing successfully solved the problem.
Hoisting mechanism in the hardened or hardened reducer, gear accuracy of 7, the tooth surface hardness 320HBS, thus increasing the carrying capacity, extended service life. Electrical control absorbing foreign advanced technology, using a novel energy-saving speed control system. If thyristor cascade open or closed loop systems, scaling up to 1:30. With the increasing demand for speed, frequency control system will also allow for the steel crane. Meanwhile, computer-controlled crane will also be applied, such as the Three Gorges dam project 600t gantry cranes require frequency control system, microcomputer automatic correction and Big Head precision microcomputer monitoring system. With the development of production requirements for remote crane is also growing, Baoshan steel mill cranes in the study abroad after the proposed remote crane develop recommendations to improve safety, reduce labor.
Cranes and more domestic computer optimized design has been adopted, in order to improve the machine's technical performance and reduce weight, and in this context as far as possible the new structure. If 5 ~ 50t overhead bridge crane used in semi-generic off-track main beam structure, compared with the track box girder can be reduced or eliminated in the small girder stiffened plate, canceled short stiffened plate, reducing structural weight, saving processing time. Currently the national Spark Program proposed bridge using four split structure is not high, making it the same with the ordinary crane lifting height, the plant can be reduced corbel elevation 1.5m; two ends of the main beam is placed end of the beam, with high strength bolts connecting; wheel tread height drop as a result, will make the plant corbels elevation drop. In the role of the vertical wheel load, the calculation of the column height reduction, to reduce the capital cost plant, plant life increases.
(2) to large-scale development
Since the state tournament source two qe two wide attention and funding the construction of many large and medium hydropower turbines is growing. Especially in the construction of the Three Gorges project requirements for large overhead gantry crane rising rapidly. Three Gorges Project main plant installed two 1200/125t bridge crane, equipped with a large tower crane 2000t. Currently in the construction of large and medium-sized hydropower stations, there are many, such as Yantan, Longtan, GEHEYAN, Fujian outlet power stations; There are many nuclear power plants and large and medium-sized power plants need to build, it can be expected, large tonnage High Performance cranes requirement is very large and broad prospects.
(3) to fully absorb foreign advanced technology
Crane size car run institutions of the German demag company's "triple play" drives, hanging on the end of the beam inside, it is not under the main beam deflection and vibration, improved operational performance and life institutions, and to structure Compact, beautiful appearance, easy installation and maintenance. With the domestic machining capabilities, so that carts end beam and small frame overall boring as possible, and thus split and wheels 45 degrees or cylindrical bearing housing will likely replace the angular bearing box, mounted on axle hole on the axle centerline and end beam centerline constitute the standard 90 degrees, so the horizontal and vertical deflection of the wheels can be strictly controlled within prescribed limits, to avoid the phenomenon of eating track. Due to the small frame is a bore formed after welding, hole center line of the four wheels in the same plane, the three-point landing successfully solved the problem.
Hoisting mechanism in the hardened or hardened reducer, gear accuracy of 7, the tooth surface hardness 320HBS, thus increasing the carrying capacity, extended service life. Electrical control absorbing foreign advanced technology, using a novel energy-saving speed control system. If thyristor cascade open or closed loop systems, scaling up to 1:30. With the increasing demand for speed, frequency control system will also allow for the steel crane. Meanwhile, computer-controlled crane will also be applied, such as the Three Gorges dam project 600t gantry cranes require frequency control system, microcomputer automatic correction and Big Head precision microcomputer monitoring system. With the development of production requirements for remote crane is also growing, Baoshan steel mill cranes in the study abroad after the proposed remote crane develop recommendations to improve safety, reduce labor.
Of competition in the crane industry pressures
According to the China Industry Research Network reported that due to efforts to increase China's economic construction, China's construction machinery industry is flourishing state, "Twelve Five" period, the state of the construction machinery industry development put forward new demands, heavy machinery has been set for the next five years, focusing on the development of the industry of the column, such a requirement is not only to bring development opportunities crane production areas but also makes the
hoist gantry crane industry enterprises faced competition in the industry pressure.
In recent years, the rapid development of the automotive industry at the same time led to the development of their respective fields, increasing truck crane manufacturer, facing strong pressure of market competition, enterprises thorough analysis industry market, scientific and accurate plans to develop new industries, promoting essential way of enterprise development. At present, China crane industry there are several aspects of the pressure:
The needs of individual customers makes the steel crane industry enterprises are facing technical challenges, China's overall technological level of heavy machinery compared to the international advanced equipment are still gaps, to promote the economic development level of user demand for high-tech equipment, therefore, various industries and enterprises should increase the product technology research and development efforts, and promote the diversification of lifting equipment, innovation and development in the field of intelligent, open up the industry to new markets.
Economic globalization, the international market, so many foreign enterprises and domestic enterprises to seize the crane industry market, foreign enterprises equipment, advanced technology, and effective use of brand occupy the domestic market, which forced domestic enterprises to continuously improve their own level, to respond quickly to sudden fluctuations in the industry, and strive to stabilize the market and maintain their own strengths and try to go beyond foreign companies, leading crane industry market and seek greater development.
Traditional bridge gantry crane equipment industry market has gradually been eliminated, replaced by intelligent products in the market promotion efforts, intelligent products have a greater level of technology needs, In addition, with the widespread popularity of crane applications, many industries and enterprises For large, extra large engineering machinery and equipment demand increase, which would give the crane manufacturing enterprises increased pressure technology for large-scale equipment, intelligent research and development, will help drive our crane industry to broader developments in the field.
In recent years, the rapid development of the automotive industry at the same time led to the development of their respective fields, increasing truck crane manufacturer, facing strong pressure of market competition, enterprises thorough analysis industry market, scientific and accurate plans to develop new industries, promoting essential way of enterprise development. At present, China crane industry there are several aspects of the pressure:
The needs of individual customers makes the steel crane industry enterprises are facing technical challenges, China's overall technological level of heavy machinery compared to the international advanced equipment are still gaps, to promote the economic development level of user demand for high-tech equipment, therefore, various industries and enterprises should increase the product technology research and development efforts, and promote the diversification of lifting equipment, innovation and development in the field of intelligent, open up the industry to new markets.
Economic globalization, the international market, so many foreign enterprises and domestic enterprises to seize the crane industry market, foreign enterprises equipment, advanced technology, and effective use of brand occupy the domestic market, which forced domestic enterprises to continuously improve their own level, to respond quickly to sudden fluctuations in the industry, and strive to stabilize the market and maintain their own strengths and try to go beyond foreign companies, leading crane industry market and seek greater development.
Traditional bridge gantry crane equipment industry market has gradually been eliminated, replaced by intelligent products in the market promotion efforts, intelligent products have a greater level of technology needs, In addition, with the widespread popularity of crane applications, many industries and enterprises For large, extra large engineering machinery and equipment demand increase, which would give the crane manufacturing enterprises increased pressure technology for large-scale equipment, intelligent research and development, will help drive our crane industry to broader developments in the field.
Heavy cranes in the chemical industry market prospects
As oil prices rose faster than on the demand for petrochemical products in the recovery phase velocity,hoist gantry crane the petrochemical industry, companies have to please the leasing company, trying to be more cost-effective services.
Asia-Pacific region during the financial crisis of affordability in 2010 OPEC developing strategic documents long since been described as refiners' ability to grow the core "of its fast recovery of the global petrochemical industry plays an important role.
In the past 20 years, the region has achieved self-sufficiency in turn develop national export of petrochemical products, although able to export petrochemical products decreased number of countries, but the proportion of petrochemical production capacity has increased in developed countries .
The establishment of the new plant and the old plant expansion is carried out up to this pace, resulting in Western Europe, Japan and the United States in 1980, when they accounted for 80 percent of the global petrochemical market countries, to 2010 in the world market share of total reached only 37%.
OPEC said the mature markets of Western Europe and the United States generally lower utilization, interim profits.steel crane As these areas the demand for petrochemical products slow recovery, so not many new projects underway.
However, in another mature markets such as the Middle East, other markets fall in consumption does not affect the good performance here. In Saudi Arabia, petrochemical products export growth of 83%, in June 2011 reached $ 1.39 billion.
Middle East countries to vote heavily in the expansion of existing production capacity after the leasing company responded quickly together toward the rapid development of the promising market. A series of expansion projects in the region behind, ALE will relocate its heavy lifting sector UAE, want to take advantage of this opportunity in the next five years to obtain greater benefits.
These projects include ALE Habshan V gas processing plant and plans 2016 Ruwais refinery expansion project completed in Phase II.
ALE Heavy sino hoist, director Paul Sands said that even if the existing equipment with Saudi Al Suwaidi transportation company providing services in terms of size, enough to see the market potential of the region, it was decided to move the company headquarters here.
Asia-Pacific region during the financial crisis of affordability in 2010 OPEC developing strategic documents long since been described as refiners' ability to grow the core "of its fast recovery of the global petrochemical industry plays an important role.
In the past 20 years, the region has achieved self-sufficiency in turn develop national export of petrochemical products, although able to export petrochemical products decreased number of countries, but the proportion of petrochemical production capacity has increased in developed countries .
The establishment of the new plant and the old plant expansion is carried out up to this pace, resulting in Western Europe, Japan and the United States in 1980, when they accounted for 80 percent of the global petrochemical market countries, to 2010 in the world market share of total reached only 37%.
OPEC said the mature markets of Western Europe and the United States generally lower utilization, interim profits.steel crane As these areas the demand for petrochemical products slow recovery, so not many new projects underway.
However, in another mature markets such as the Middle East, other markets fall in consumption does not affect the good performance here. In Saudi Arabia, petrochemical products export growth of 83%, in June 2011 reached $ 1.39 billion.
Middle East countries to vote heavily in the expansion of existing production capacity after the leasing company responded quickly together toward the rapid development of the promising market. A series of expansion projects in the region behind, ALE will relocate its heavy lifting sector UAE, want to take advantage of this opportunity in the next five years to obtain greater benefits.
These projects include ALE Habshan V gas processing plant and plans 2016 Ruwais refinery expansion project completed in Phase II.
ALE Heavy sino hoist, director Paul Sands said that even if the existing equipment with Saudi Al Suwaidi transportation company providing services in terms of size, enough to see the market potential of the region, it was decided to move the company headquarters here.
"Made in China" crane there are some gaps in the overall rise
Our crane manufacturing industry from scratch, gradually developed, the "Eleventh Five-Year" period of domestic
bridge gantry crane manufacturing industry has made considerable progress, some large and medium-sized backbone enterprises of some products have reached the international advanced level and even lead, but overall still with foreign advanced level there are still some gaps.
Compared with the international advanced level, the domestic enterprises in the large equipment product development and system integration capabilities, general equipment of different specifications and performance of products, parts, components, and the reliability of the product appearance and coating, people Machine relations and other aspects of environmental factors, there are still some gaps.
At present, China's crane products with foreign advanced level gap is mainly reflected in the industrial scale, the core technology, management, talent pool and so on.
In the industrial scale, the comparison with the large foreign enterprises and domestic enterprises in the overhead gantry crane scale is still a large gap between the small-scale, the formation of the international context of enterprise technology innovation and marketing and service network construction, generating constraints. However, in recent years, Chinese crane industry to achieve a "blowout" development, the crane industry scale and enterprise scale, closer to the requirements of international operations.
In the core technology, our crane technology is relatively backward, equipment performance can not meet the processing requirements, means of control failure, quality assurance system can not function effectively, outstanding performance in part flatness, roughness, and the vertical axis to reach the design requirements , but the quality of domestic fittings hard.
A hydraulic products, for example. Although our hydraulic industry has made great progress, but with the world advanced level, there are still large gaps, mainly reflected in product variety, performance, and reliability. Only foreign varieties of hydraulic products for 1/3, life abroad 1/2. To meet the key host, hosts, and imports of major technical equipment needs, every year a large number of hydraulic products imports.
Especially in the management of international management experience deficiencies, has become China's crane business internationalization process more difficult to break one aspect. From the company's management philosophy to the corporate culture, from basic management systems into thinking ability, etc., each have a non-overnight transformation can be realized.
Heavy machinery manufacturing industry as a high-tech talent competition is the crane industry toward nationalization of important support, and the current lack of talent pool has become our crane industry to better participate in international market competition, an important obstacle, therefore, the relevant enterprises should strengthen the training and introduction to understand the needs of the international market background and talents, to create an excellent, with international operational capacity of the personnel to the international development of enterprises laid a good foundation.
Crane Industry Outlook Industry Research Institute researcher Zhang Lan chant that the future will focus on the global overhead bridge crane industry products large-scale, high-speed, durability and specialization of direction, the series modular, combination, standardization and practical orientation and general product miniaturization, lighter, simple and diversification direction, end, China crane enterprises should increase investment in research, personnel training and introduction, and effectively enhance the core competitiveness of the industry, and actively participate in international market competition.
Compared with the international advanced level, the domestic enterprises in the large equipment product development and system integration capabilities, general equipment of different specifications and performance of products, parts, components, and the reliability of the product appearance and coating, people Machine relations and other aspects of environmental factors, there are still some gaps.
At present, China's crane products with foreign advanced level gap is mainly reflected in the industrial scale, the core technology, management, talent pool and so on.
In the industrial scale, the comparison with the large foreign enterprises and domestic enterprises in the overhead gantry crane scale is still a large gap between the small-scale, the formation of the international context of enterprise technology innovation and marketing and service network construction, generating constraints. However, in recent years, Chinese crane industry to achieve a "blowout" development, the crane industry scale and enterprise scale, closer to the requirements of international operations.
In the core technology, our crane technology is relatively backward, equipment performance can not meet the processing requirements, means of control failure, quality assurance system can not function effectively, outstanding performance in part flatness, roughness, and the vertical axis to reach the design requirements , but the quality of domestic fittings hard.
A hydraulic products, for example. Although our hydraulic industry has made great progress, but with the world advanced level, there are still large gaps, mainly reflected in product variety, performance, and reliability. Only foreign varieties of hydraulic products for 1/3, life abroad 1/2. To meet the key host, hosts, and imports of major technical equipment needs, every year a large number of hydraulic products imports.
Especially in the management of international management experience deficiencies, has become China's crane business internationalization process more difficult to break one aspect. From the company's management philosophy to the corporate culture, from basic management systems into thinking ability, etc., each have a non-overnight transformation can be realized.
Heavy machinery manufacturing industry as a high-tech talent competition is the crane industry toward nationalization of important support, and the current lack of talent pool has become our crane industry to better participate in international market competition, an important obstacle, therefore, the relevant enterprises should strengthen the training and introduction to understand the needs of the international market background and talents, to create an excellent, with international operational capacity of the personnel to the international development of enterprises laid a good foundation.
Crane Industry Outlook Industry Research Institute researcher Zhang Lan chant that the future will focus on the global overhead bridge crane industry products large-scale, high-speed, durability and specialization of direction, the series modular, combination, standardization and practical orientation and general product miniaturization, lighter, simple and diversification direction, end, China crane enterprises should increase investment in research, personnel training and introduction, and effectively enhance the core competitiveness of the industry, and actively participate in international market competition.
Electric hoist crane our region's exports to developing countries showed a high growth
Electric hoist crane export agency still promoted. Electric hoist crane has a number of base, technological innovation and strong export main force. These companies have their own brand products,bridge gantry crane with international leadership and vision to fight international marketing talent, after years of development, has gradually emerged in the international market. But the state of export enterprises decentralized management can not be ignored, most enterprises have business instability, inefficient and unable to carry out service and other operating defects. Few export enterprises in the international market to take acts of unfair competition also on the "Made in China" steel crane products cause adverse effects. Since electric hoist crane Export urgent need to establish a sound service system, and the process involves the use of safety factors, recommend appropriate import and export enterprises to improve the access threshold.
Electric hoist crane substantial growth in exports to emerging markets. In the world economy is not stable, it is also good situation of the developing countries, China electric hoist gantry crane products are relatively low grade, high cost, have a good market in developing countries is reflected in China to Russia and other CIS countries Africa and other developing regions of ASEAN's exports is still rapid growth.
Large cranes "encounter" increased market opportunities in Europe
As we all know, whether in production or longer in use, China has been the largest market for cranes in exports also has an irreplaceable position. Although in recent years has been the impact of the economic situation at home and abroad, the export volume has been reduced, but the 2012 is approaching, the rumors say, but will usher in the export opportunities, especially in the European market. Although at this stage the number of small cranes on the European market has been spilled, but for large
steel crane , the market's "encounter" opportunities will be more and more.
One opportunity: 2012 UEFA European Football Championship
Now Poland, is busy preparing for the European Football Federation 2012 European Football Championship, as the host of this event, one of Poland required substantial investment. For example, the capital of Poland for Euro 2012, one of key construction projects in the National Stadium in Warsaw. Meanwhile, in the transport infrastructure still needs a lot of investment, only large-scale investment projects that are expected to more than 1 billion euros on, this is the country's current national construction cost of nearly 30%. Here's residential and infrastructure construction market another boom, housing and infrastructure, there has been large-scale projects. In infrastructure, the crane is absolutely essential for the mechanical one, so this overhead gantry crane for Chinese manufacturers, as long as they achieve cooperation, this is definitely a huge market share.
The two opportunities: Wind energy construction
European crane market prosperity will be another place Scania areas, where large crane equipment has been in short supply state. More than 6.6 trillion euros of the capital cost of wind power in Finland, Norway and Sweden has brought more than 10 billion euros of credit, so that here the crane company to meet the needs of exhausted, but still can not meet the market demand, and in Norway, people used to in large-scale projects will be outsourced to foreign companies. China Machinery Network pointed out that, in recent years, these areas at the land wind power generation will still have significant investments, if China crane companies to win a share in this market, it will be driven by the overall Chinese hoist gantry crane industry.
Industry analysts said: "In the recent downturn in the world economy of the state, although most markets are depressed, but local circumstances. 'East does not shine bright', which is inevitable, if a local situation is bad they do not represent the whole of this, just as some European market good question, and there are emerging markets like these will see you how to find opportunity, how to mobilize the production and export of. "
One opportunity: 2012 UEFA European Football Championship
Now Poland, is busy preparing for the European Football Federation 2012 European Football Championship, as the host of this event, one of Poland required substantial investment. For example, the capital of Poland for Euro 2012, one of key construction projects in the National Stadium in Warsaw. Meanwhile, in the transport infrastructure still needs a lot of investment, only large-scale investment projects that are expected to more than 1 billion euros on, this is the country's current national construction cost of nearly 30%. Here's residential and infrastructure construction market another boom, housing and infrastructure, there has been large-scale projects. In infrastructure, the crane is absolutely essential for the mechanical one, so this overhead gantry crane for Chinese manufacturers, as long as they achieve cooperation, this is definitely a huge market share.
The two opportunities: Wind energy construction
European crane market prosperity will be another place Scania areas, where large crane equipment has been in short supply state. More than 6.6 trillion euros of the capital cost of wind power in Finland, Norway and Sweden has brought more than 10 billion euros of credit, so that here the crane company to meet the needs of exhausted, but still can not meet the market demand, and in Norway, people used to in large-scale projects will be outsourced to foreign companies. China Machinery Network pointed out that, in recent years, these areas at the land wind power generation will still have significant investments, if China crane companies to win a share in this market, it will be driven by the overall Chinese hoist gantry crane industry.
Industry analysts said: "In the recent downturn in the world economy of the state, although most markets are depressed, but local circumstances. 'East does not shine bright', which is inevitable, if a local situation is bad they do not represent the whole of this, just as some European market good question, and there are emerging markets like these will see you how to find opportunity, how to mobilize the production and export of. "
Gantry crane maintenance content
1 gantry crane luffing gear rack drives the various security settings should be sensitive and reliable. Because the rack easier to wear in the job, resulting in shock when starting and braking, such as security settings are not reliable, the boom will occur over travel and the risk of falling.
2 bridge gantry crane hydraulic luffing drive device is a compact, able to withstand two-way force, etc., but its piston, cylinder, push rod has a certain precision, to strengthen maintenance.
3 attachment bolts torque wrench to be used, so that the preload is relatively uniform. Since gantry crane operation prone to vibration, to regularly check the bolts are loose.
4 using the hydraulically actuated brake should always check the hydraulic oil quantity is insufficient to amount to add. To check whether the pipe joints with hydraulic oil or air leakage into the interior of the tank, such as air tanks should be promptly removed.
5 Run agencies and brakes should always check, especially if you want to check the steel crane brake solenoid is stuck due to vibration does not move, but also check whether the solenoid coil damp.
6 the hydraulic pump oil varieties, the temperature should be selected depending on the region. To prevent the pump draws air in the work process, we should always check the discharge.
7 As gantry cranes self-important,overhead gantry crane therefore trolley bearings should be balanced calcium-based grease once a week to ensure that the friction surface will not appear dry friction phenomenon.
2 bridge gantry crane hydraulic luffing drive device is a compact, able to withstand two-way force, etc., but its piston, cylinder, push rod has a certain precision, to strengthen maintenance.
3 attachment bolts torque wrench to be used, so that the preload is relatively uniform. Since gantry crane operation prone to vibration, to regularly check the bolts are loose.
4 using the hydraulically actuated brake should always check the hydraulic oil quantity is insufficient to amount to add. To check whether the pipe joints with hydraulic oil or air leakage into the interior of the tank, such as air tanks should be promptly removed.
5 Run agencies and brakes should always check, especially if you want to check the steel crane brake solenoid is stuck due to vibration does not move, but also check whether the solenoid coil damp.
6 the hydraulic pump oil varieties, the temperature should be selected depending on the region. To prevent the pump draws air in the work process, we should always check the discharge.
7 As gantry cranes self-important,overhead gantry crane therefore trolley bearings should be balanced calcium-based grease once a week to ensure that the friction surface will not appear dry friction phenomenon.
2013年8月21日星期三
Bridge crane inspection and maintenance system - inspection and lubrication
3 half Inspection and Maintenance
Maintenance and inspection once every six months, including the month in addition to checking the content outside there should be:
1) Check that all the gear reducer and wear,overhead bridge crane pitting damage to the tooth surface should not exceed 30% of the engagement surface and a depth of not more than 10% of the original thickness of the teeth (tooth thickness fixed chord); wear of the tooth thickness the percentage of the original tooth thickness does not exceed 15% to 25%; Check bearing condition; replace oil.
2) check whether large, small wheel condition, the wheel bearings lubricated track to eliminate the phenomenon of eating.
3) Check the main girder, end beam welds have to open the main welding, corrosion phenomena, rust should not exceed 10% of the original thickness of the principal stress components whether fatigue cracks; various rails, brackets are intact; inspection girder, end beam and tighten the bolt again.
4) Check the main beam deformation. Check the trolley track situation. Main beam interference under no load should not exceed the span 1/2000; girders bent inwards next level measured length shall not exceed 1/1500; trolley rail track should not produce the phenomenon,sino hoist rail top face and flank wear ( sided) volume must not exceed 3mm.
5) Check the reel case, reel wall wear should not exceed 20% of the original wall, rope groove hump does not strain the tip.
6) Tighten all bolts on the crane and fastening bolts.
4 crane lubrication
Lubrication is to ensure the normal operation of the machine, to extend the life of parts, improve efficiency and safety of the important measures. Maintenance personnel should fully understand the importance of lubrication equipment, always check the lubrication of all moving points, and regularly add oil to each lubrication points (grease).
4.1 Dan river bridge machine main power plant lubrication
① bridge machine winch; ② kinds of bearings; ③ each gear couplings; ④ reducer; ⑤ rope; ⑥ hinge point on the brake.
4.2 Lubrication Precautions
1) maintain the lubricant (grease) clean;
2) different grades of lubricating oil (fat) should not be mixed;
3) selection of a suitable lubricant (grease) at the stipulated time for lubrication;
4) using pressure greasing France (grease gun or pump, screw-type oil cup) add grease, so you can put grease pushed the friction surface to prevent his hand when not enter the friction surface;
5) wet areas should not use sodium based grease, because of its hydrophilic, easy to lapse;
6) The agency did not oiling point rotating parts, should be regularly rotated with dilute oiler in the gap,overhead gantry crane in order to reduce mechanical friction and prevent corrosion.
Bridge crane inspection and maintenance system - weekly inspection and monthly inspection
bridge gantry crane components as more different techniques for the various components of the features, we will be maintained in the actual work, inspection cycle is divided into weeks, months, years, each cycle including the following:
1 weekly inspection and maintenance
Maintenance and inspection once a week, inspection and maintenance as follows:
1) Check the brakes on the nuts, cotter pins, positioning plates are complete, loose, levers and springs without cracks, pin on the brake wheel bolts and washers are loose cushion, complete; brakes are reliable braking. Brake release opening of the brake pads should be less than 1.0mm, and the distance of the gap on both sides of the brake drum should be equal, the pivot pin may have stuck.
2) Check the safety switch and limit switch is accurate, flexible and reliable work, especially the increase in the limit is reliable.
3) Check the wire rope on the drum and pulley wound is normal, without off-tank, channeling, knotted, twisted and other phenomena, wire rope clamp bolts are tightened, whether there is double nut locking devices.
4) Check the hoisting mechanism coupling closures fastening screw is loose, the shortage.
5) Check the transmission mechanism is normal,overhead bridge crane with or without abnormal noise.
6) Check all lubrication lubrication condition is good.
7) Check the track if there is a foreign body obstruction bridge machine is running.
(2) Monthly inspection and maintenance
Once monthly maintenance and inspection, inspection and maintenance, we cover every week to the contents include:
1) Check the brake pad wear pads should not exceed 2mm, wheel and brake pad contact area shall not be less than 70%; checks the status of each mounting pin and wear and lubrication conditions, the amount of wear of the pin should not exceed 5% of the original diameter of the small axis and the amount of wear of the mandrel should not exceed 5% of the original diameter and ovality than 0.5mm.
2) Check the wire rope for wear, if there is broken wire and so on, check the wire rope lubrication conditions.
3) Check the hook for cracks, wear and tear of its dangerous section does not exceed 5% of the original thickness; hook nut locking device is complete, set the hook on the various parts are complete and reliable. Hook should rotate flexible, non-jamming phenomenon.
4) Check that all bolts are loose and shortages.
5) Check the motor, reducer bolts fastening the base and individually fastened.
6) Check the gearbox lubrication conditions, the oil level should be within the specified range, measures should be taken against oil leakage sites prevent leakage.
7) of the gears.
8) Check the balance at the rope pulleys for wear on pulleys and pulley shaft lubrication.
9) Check the pulley position, to see whether it flexible, without damage, cracks, particular attention to the wear of the fixed pulley shaft.
10) Check the brake wheel, uneven surface of its work should not exceed 1.5mm, brake wheel should not have cracks, its radial runout should be less than 0.3mm.
11) Check the coupling, which should not be on the key and keyway damage, loose; two coupling between the drive shaft axial string momentum should be 2 ~ 7mm.
12) Check the size of the vehicle operating conditions, should not have gnawing rails, three fulcrum, when the pendulum starts and stops and so on. Check the wheel rim and the tread wear, the wear of the rim thickness should not exceed 50% of the original thickness, wheel tread wear should not exceed 3% of the diameter of the wheel of the original.
13) Check the cart track conditions,overhead gantry crane to see whether the bolts loose, shortages, pressure plate is fixed on the track, rail cracks and fracture; two tracks whether the gap joints 1 ~ 2mm (summer) or 3 ~ 5mm ( winter), the joint down, left dislocation is more than 1mm.
14) for the crane to conduct a comprehensive clean, clear on dirt.
Crane drivers work safety supervision
One: the safe operation of the
steel crane driver checks
(1) Lifting equipment shall be held operating permit personnel to operate, operation, energy should be concentrated;
(2) conduct a class before work load test, check all parts for defects, safety devices are sensitive;
(3) crane operation, should be the first Ming signal to prohibit human head hanging objects from passing;
(4) close to the rated load lifting weights, you should take a test hanging, that is not too high from the ground, in the air landing time to check the brake mechanism is feasible;
(5) when the crane failure, the driver shall stop work immediately, disconnect the power. If there is heavy lifting, you should send signals, and set aside the danger zone, if the parking time is longer, you should try to put down or hanging objects paving, reporting leadership or associated personnel overhaul, repaired after the test to confirm intact rear can work;
(6) the work must comply with "Ten is not hanging", that command signal or persons unknown command help,bridge gantry crane over load is not suspended, the work is not binding is not strong hanging, hanging things people do not hang on the station, safety devices, failure is not hanging, object buried in the ground without lifting, poor lighting does not hang, no hanging hanging oblique oblique, sharp objects at the pad soft material does not hang, objects, people do not hang down;
(7) when lifting heavy objects fall to the lowest position, the roll of wire stored on not less than twice;
(8) When used in the Cable Car parking not allowed to hang weights. Only after removing the weight and hook rose appropriate height, control handle stops at zero, then cut off the power supply is disabled.
Two. The crane drivers are familiar with the operating environment of the inspection
As a crane driver, in addition to master the safe operation, maintenance and other aspects of knowledge, but also familiar with its operating environment in order to prevent personal injury or equipment damage accidents.
(A) the characteristics and ground operations personnel activity patterns;
(2) the characteristics of normal lifting goods;
(3) the characteristics of the production process;
(4) characteristics of the environment. Some workplace noise, the driver can not be found in a variety of cranes is not normal sound,hoist gantry crane especially commanding sound signals and mechanical noise intertwined, drivers tend to make misleading or judgment is unclear. Others such as dust concentration of the environment, high temperature environment, the environment of corrosive gas and more, will give the crane operation and operation to bring the corresponding problem.
(1) Lifting equipment shall be held operating permit personnel to operate, operation, energy should be concentrated;
(2) conduct a class before work load test, check all parts for defects, safety devices are sensitive;
(3) crane operation, should be the first Ming signal to prohibit human head hanging objects from passing;
(4) close to the rated load lifting weights, you should take a test hanging, that is not too high from the ground, in the air landing time to check the brake mechanism is feasible;
(5) when the crane failure, the driver shall stop work immediately, disconnect the power. If there is heavy lifting, you should send signals, and set aside the danger zone, if the parking time is longer, you should try to put down or hanging objects paving, reporting leadership or associated personnel overhaul, repaired after the test to confirm intact rear can work;
(6) the work must comply with "Ten is not hanging", that command signal or persons unknown command help,bridge gantry crane over load is not suspended, the work is not binding is not strong hanging, hanging things people do not hang on the station, safety devices, failure is not hanging, object buried in the ground without lifting, poor lighting does not hang, no hanging hanging oblique oblique, sharp objects at the pad soft material does not hang, objects, people do not hang down;
(7) when lifting heavy objects fall to the lowest position, the roll of wire stored on not less than twice;
(8) When used in the Cable Car parking not allowed to hang weights. Only after removing the weight and hook rose appropriate height, control handle stops at zero, then cut off the power supply is disabled.
Two. The crane drivers are familiar with the operating environment of the inspection
As a crane driver, in addition to master the safe operation, maintenance and other aspects of knowledge, but also familiar with its operating environment in order to prevent personal injury or equipment damage accidents.
(A) the characteristics and ground operations personnel activity patterns;
(2) the characteristics of normal lifting goods;
(3) the characteristics of the production process;
(4) characteristics of the environment. Some workplace noise, the driver can not be found in a variety of cranes is not normal sound,hoist gantry crane especially commanding sound signals and mechanical noise intertwined, drivers tend to make misleading or judgment is unclear. Others such as dust concentration of the environment, high temperature environment, the environment of corrosive gas and more, will give the crane operation and operation to bring the corresponding problem.
Cranes equipped with safety devices which
To ensure safe and reliable lifting operations,
bridge gantry crane equipped with a better safety devices in order to unexpected circumstances, play a protective parts or alert the operator, and thus play a security role.
A hydraulic system, the pressure relief valve: inhibit loop abnormally high pressure in order to prevent damage to the hydraulic pumps and motors, and to prevent is overloaded.
2 luffing jib safety device: When the unexpected accident, boom luffing cylinder loop pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from work oil, the boom will not fall, thereby ensuring the safety of operation.
3 telescopic crane safety device: When unexpected accidents, telescopic boom cylinder circuit of the high-pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from the working oil, the suspension will retract themselves,hoist gantry crane thus ensuring the safety of operation.
4 height limit device: hook up the required height to rise after touching limit hammer, turn the trip switch, "over round" indicator light that is bright, while cutting off the hook lifting, boom stretched out, hanging Arm volts to the operation of such action to ensure safety. Then just manipulate the hook down, boom boom retracted or looked up (to the Security side operation), etc. handle, lift the weight limit constraint, the operation returns to normal. For special occasions, such as still need to make a small amount of over-winding operation, press the release button on the meter box, this time limit will be lifted role, but this time the operation must be very careful to prevent accidents.
5 leg locking device: When unexpected accident occurred, leading to the leg vertical cylinder hoses or tubing rupture or cutting, the hydraulic system can be disabled with a two-way hydraulic lock cylinder two leg blocking pressure oil chamber, the branch Notations or throw the legs, thereby ensuring the safety of the lifting operation.
6 from the weight indicator: Starting weight indicator is set in the basic arm together side (ie, the right side of the cab), the operator sitting in the control room can be clearly observed, can accurately indicate the boom elevation and the corresponding conditions allow cranes rated capacity.
7 Lifting Characteristics Table:sino hoist Set in the control room on the front side of the lower wall, the table lists the various arm lengths and a variety of work rate and the nominal weight lifting height for operation inspection. Lifting operation, must not exceed the values specified in the table.
A hydraulic system, the pressure relief valve: inhibit loop abnormally high pressure in order to prevent damage to the hydraulic pumps and motors, and to prevent is overloaded.
2 luffing jib safety device: When the unexpected accident, boom luffing cylinder loop pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from work oil, the boom will not fall, thereby ensuring the safety of operation.
3 telescopic crane safety device: When unexpected accidents, telescopic boom cylinder circuit of the high-pressure hose or pipe burst or cut off, the hydraulic circuit balancing valves on the work, lock cylinder lower chamber from the working oil, the suspension will retract themselves,hoist gantry crane thus ensuring the safety of operation.
4 height limit device: hook up the required height to rise after touching limit hammer, turn the trip switch, "over round" indicator light that is bright, while cutting off the hook lifting, boom stretched out, hanging Arm volts to the operation of such action to ensure safety. Then just manipulate the hook down, boom boom retracted or looked up (to the Security side operation), etc. handle, lift the weight limit constraint, the operation returns to normal. For special occasions, such as still need to make a small amount of over-winding operation, press the release button on the meter box, this time limit will be lifted role, but this time the operation must be very careful to prevent accidents.
5 leg locking device: When unexpected accident occurred, leading to the leg vertical cylinder hoses or tubing rupture or cutting, the hydraulic system can be disabled with a two-way hydraulic lock cylinder two leg blocking pressure oil chamber, the branch Notations or throw the legs, thereby ensuring the safety of the lifting operation.
6 from the weight indicator: Starting weight indicator is set in the basic arm together side (ie, the right side of the cab), the operator sitting in the control room can be clearly observed, can accurately indicate the boom elevation and the corresponding conditions allow cranes rated capacity.
7 Lifting Characteristics Table:sino hoist Set in the control room on the front side of the lower wall, the table lists the various arm lengths and a variety of work rate and the nominal weight lifting height for operation inspection. Lifting operation, must not exceed the values specified in the table.
Lifting Basics
Lifting machinery, is used for vertical lifting or moving heavy objects vertically and horizontally electromechanical devices. The range is specified at rated capacity greater than or equal to 0.5t lift, rated capacity greater than or equal to 1t, and lift height is greater than or equal to 2m,
steel crane and load-bearing fixed in the form of electric hoist.
2. Lifting work characteristics
(1) Lifting typically have more complex structures and large institutions, to complete a lifting movement, once or several times horizontally.
(2) a variety of weight lifting, the load is changing.
(3) Most of lifting machinery, you need to operate within the larger context, activities, larger space.
(4) some lifting, carrying personnel require direct rail, platform or rope to do lifting movement (such as elevators,overhead bridge crane lifting platforms, etc.), which directly affects the reliability safety.
(5) exposed, moving parts are more often associated with lifting operations and personnel in direct contact (eg hook, wire rope, etc.), a potential risk factor for many sporadic.
(6) operating environment is complex.
(7) the job often requires people, together, in a single operation.
The existence of many of the above risk factors, determines the lifting injury accident-prone.
3 crane safety working conditions
In order to ensure the safety of the crane work,hoist gantry crane crane design should meet the following three basic conditions.
(1) The metal structure and mechanical parts should have sufficient strength, rigidity and resistance to buckling.
(2) the machine must have the necessary stability against overturning.
(3) having a prime mover power to meet the performance requirements of the job, brakes provide the necessary braking torque.
2. Lifting work characteristics
(1) Lifting typically have more complex structures and large institutions, to complete a lifting movement, once or several times horizontally.
(2) a variety of weight lifting, the load is changing.
(3) Most of lifting machinery, you need to operate within the larger context, activities, larger space.
(4) some lifting, carrying personnel require direct rail, platform or rope to do lifting movement (such as elevators,overhead bridge crane lifting platforms, etc.), which directly affects the reliability safety.
(5) exposed, moving parts are more often associated with lifting operations and personnel in direct contact (eg hook, wire rope, etc.), a potential risk factor for many sporadic.
(6) operating environment is complex.
(7) the job often requires people, together, in a single operation.
The existence of many of the above risk factors, determines the lifting injury accident-prone.
3 crane safety working conditions
In order to ensure the safety of the crane work,hoist gantry crane crane design should meet the following three basic conditions.
(1) The metal structure and mechanical parts should have sufficient strength, rigidity and resistance to buckling.
(2) the machine must have the necessary stability against overturning.
(3) having a prime mover power to meet the performance requirements of the job, brakes provide the necessary braking torque.
2013年8月20日星期二
Growth Variation Manqu
2012 perhaps destined to be a bumpy journey
overhead bridge crane industry began.
Right now, the U.S. economy is still a lot of uncertainty, and dragged down by the debt crisis, the European economy is still sluggish. But for the majority of the world emerging economies, infrastructure need to be improved, still continuing to promote. Correspondingly, the vast majority crane manufacturer since 2011 in the fast-growing world-wide reboot, even beyond the 2008 hit a record high.
In fact, this year's global mobile cranes 10 companies total sales to $ 13.021 billion, a figure from the previous year to achieve a 15.37% growth. This is since the financial crisis of its total sales for the first time to achieve positive growth.
But the most disturbing, than has been labeled as the world's largest hoist gantry crane market in China. Began in mid-2011 slowdown, allowing construction machinery enterprises instantly fell uneasy suspicions, whereas all the controversy surrounding the bottoming out and speculation, it has yet conclusive.
In addition, the judge also has a European economic uncertainty. In 2008, the global financial crisis, but then the bridge gantry crane industry rely on the government, "four trillion" stimulus policies implemented in 2009 more than 30% growth. The industry slump has lasted more than a year, based on past experience, from 2013 to 2014, or to see the national macro-control effects of the show. But the end result will depend on favorable and unfavorable factors superimposed. Favorable factors, the industry will be a 10% increase; many unfavorable factors, the industry may be negative growth.
Right now, the U.S. economy is still a lot of uncertainty, and dragged down by the debt crisis, the European economy is still sluggish. But for the majority of the world emerging economies, infrastructure need to be improved, still continuing to promote. Correspondingly, the vast majority crane manufacturer since 2011 in the fast-growing world-wide reboot, even beyond the 2008 hit a record high.
In fact, this year's global mobile cranes 10 companies total sales to $ 13.021 billion, a figure from the previous year to achieve a 15.37% growth. This is since the financial crisis of its total sales for the first time to achieve positive growth.
But the most disturbing, than has been labeled as the world's largest hoist gantry crane market in China. Began in mid-2011 slowdown, allowing construction machinery enterprises instantly fell uneasy suspicions, whereas all the controversy surrounding the bottoming out and speculation, it has yet conclusive.
In addition, the judge also has a European economic uncertainty. In 2008, the global financial crisis, but then the bridge gantry crane industry rely on the government, "four trillion" stimulus policies implemented in 2009 more than 30% growth. The industry slump has lasted more than a year, based on past experience, from 2013 to 2014, or to see the national macro-control effects of the show. But the end result will depend on favorable and unfavorable factors superimposed. Favorable factors, the industry will be a 10% increase; many unfavorable factors, the industry may be negative growth.
Crane industry related specifications
In order to eliminate hidden dangers, construction quality and safety supervision station specifically for city construction
overhead bridge crane operations management developed ten "red line", builders beyond any one of them, will face severe punishment, in serious cases, they will be hung booked even withheld safety production license.
It is reported that the supervisory authority will take the spot test method, the inspection found that the construction sino hoist management responsibilities are not implemented, there are security risks units and persons responsible for strict accountability, as appropriate, to give warning, hanging yellow card, remember bad behavior, withheld safety production license (or into fertilizer record card) and other penalties. Meanwhile, the city construction quality supervision station developed a "construction crane Ten Management 'red line'", focusing on the legal formalities to fulfill equipment operator certificates, safety limit safety device intact, implement regular inspection and maintenance as made it clear that.
Please steel crane industry related personnel comply with relevant regulations!
It is reported that the supervisory authority will take the spot test method, the inspection found that the construction sino hoist management responsibilities are not implemented, there are security risks units and persons responsible for strict accountability, as appropriate, to give warning, hanging yellow card, remember bad behavior, withheld safety production license (or into fertilizer record card) and other penalties. Meanwhile, the city construction quality supervision station developed a "construction crane Ten Management 'red line'", focusing on the legal formalities to fulfill equipment operator certificates, safety limit safety device intact, implement regular inspection and maintenance as made it clear that.
Please steel crane industry related personnel comply with relevant regulations!
Bridge crane normal operation, gnawing rail hazards
Crane normal operation, the wheel rim and the orbit must maintain a certain gap between the design maximum gap of 30-40mm, but in exceptional circumstances, the wheel is not in the middle of running its tread,hoist gantry crane rim and squeezing each side of the track friction gnawing rail failure occurred, affecting the safe operation of the crane.
First, the dangers of eating track
1. Reducing the service life of the wheel and rail. Intermediate bridge crane in the type of work under normal use, the wheels can be used for 10 years or longer, but the gnawing serious rail bridge crane, wheel life difficult than one year, or even only a few months, resulting in frequent replacement wheels. Side of the track rail friction also reduces the service life, serious, track access is only 3-5 years scrapped.
2. Increase the running resistance. According to the determination, serious gnawing rail bridge gantry crane running resistance is the resistance of 1.5-3.5 times normal operation, causing the motor and drive mechanism to increase the load even overloaded, the motor can be severe burning or transmission failure. Bridge crane with the risk of derailment. Overhead crane rails serious bite, the wheel rim is compressional deformation, may climb the top of the track causing derailment.
3. Negative impact on the building structure. Easy to produce horizontal rail crane gnawing lateral force, causing lateral displacement of the track, the track bolts loose. In addition,sino hoist the lateral force transmitted to the plant through the roof rail, seriously affecting the bridge and plant stress conditions so trusses Itabashi partial loosening or breakage.
First, the dangers of eating track
1. Reducing the service life of the wheel and rail. Intermediate bridge crane in the type of work under normal use, the wheels can be used for 10 years or longer, but the gnawing serious rail bridge crane, wheel life difficult than one year, or even only a few months, resulting in frequent replacement wheels. Side of the track rail friction also reduces the service life, serious, track access is only 3-5 years scrapped.
2. Increase the running resistance. According to the determination, serious gnawing rail bridge gantry crane running resistance is the resistance of 1.5-3.5 times normal operation, causing the motor and drive mechanism to increase the load even overloaded, the motor can be severe burning or transmission failure. Bridge crane with the risk of derailment. Overhead crane rails serious bite, the wheel rim is compressional deformation, may climb the top of the track causing derailment.
3. Negative impact on the building structure. Easy to produce horizontal rail crane gnawing lateral force, causing lateral displacement of the track, the track bolts loose. In addition,sino hoist the lateral force transmitted to the plant through the roof rail, seriously affecting the bridge and plant stress conditions so trusses Itabashi partial loosening or breakage.
Mobile crane are several?
Mobile crane is rotating jib crane. Since the power system on its own drive, also known as self-propelled cranes, which used to be called pneumatic tire assembly wheeled cranes. Mobile
overhead gantry crane can travel long distances and flexible conversion job site, mobility, and therefore widely used.
There are mobile crane truck crane, tire cranes and crawler cranes, their characteristics are briefly described below.
1. Used truck crane chassis, with a car driving through the performance, speed is high. Disadvantage is running can not load, lifting legs must fight. But because of its flexible, fast transfer characteristics, making the use of mobile cranes largest amount cranes.
2. Crane uses a specially designed tire tire chassis, wide track, good stability, can work around all sides, on flat ground without legs can load driving. In other countries, especially off-road tire tire hoist gantry crane more widely used, much to replace cranes trend.
3. Crawler crane with crawler chassis, walking by the crawler crane. Compared with the wheeled crane has its outstanding features: Crawler large contact area with the ground than live small, in the soft, muddy ground operations; traction coefficient is high, climbing degree, you can travel on bumpy field; crawler bearing wide, good stability, generally do not need to set outrigger devices. Weakness is cumbersome,bridge gantry crane slow driving on pavement damage effects, higher manufacturing costs.
There are mobile crane truck crane, tire cranes and crawler cranes, their characteristics are briefly described below.
1. Used truck crane chassis, with a car driving through the performance, speed is high. Disadvantage is running can not load, lifting legs must fight. But because of its flexible, fast transfer characteristics, making the use of mobile cranes largest amount cranes.
2. Crane uses a specially designed tire tire chassis, wide track, good stability, can work around all sides, on flat ground without legs can load driving. In other countries, especially off-road tire tire hoist gantry crane more widely used, much to replace cranes trend.
3. Crawler crane with crawler chassis, walking by the crawler crane. Compared with the wheeled crane has its outstanding features: Crawler large contact area with the ground than live small, in the soft, muddy ground operations; traction coefficient is high, climbing degree, you can travel on bumpy field; crawler bearing wide, good stability, generally do not need to set outrigger devices. Weakness is cumbersome,bridge gantry crane slow driving on pavement damage effects, higher manufacturing costs.
Overhead crane load sway reasons
When using material handling
sino hoist when the crane carts, trolleys and lifting mechanism motion by the respective operating instructions are usually controlled independently; when handling the material reaches the target position, due to the carts and trolley deceleration effects load swing phenomenon appears objectionable; when the load swing, the unloading operation can not be performed.
The above situation, only skilled operatives is possible by controlling the size of the car running to eliminate rocking. However, this requires highly skilled operatives operating skills and a high degree of concentration. Elimination of the load to adjust the load swing and microscopic target position takes a long operation time, which accounts for the handling about one third of the time required.
In addition, the overhead bridge crane load quickly run will cause much of a swing. Excessive load swing on-site operations pose a threat to personal safety. Also increases the load and the load swing around the possibility of damage to the goods being. Swinging has become a crane load limit movement of materials to improve the efficiency of a major factor.
Crane brake inspection
Brakes are important parts of the crane, the agencies directly affect the accuracy and reliability of the movement. Therefore, we must carefully check the hoist and luffing two institutions brake condition, observe the opening of the brake shoe friction elements and the wear of the brake pads. Band brake brake band to pay attention to check for cracks in steel backing, whether flexible transmission brake,hoist gantry crane brake frame is intact and the main spring and the auxiliary spring elastic compliance.
Bridge crane track to determine: the dimensions of the goods to be able to pass the legs flat steel frame. Along the mast to meet stability requirements crane track direction. Note that track B and span S proportional relationship, and generally track B = (1/4-1/6) S.
The above situation, only skilled operatives is possible by controlling the size of the car running to eliminate rocking. However, this requires highly skilled operatives operating skills and a high degree of concentration. Elimination of the load to adjust the load swing and microscopic target position takes a long operation time, which accounts for the handling about one third of the time required.
In addition, the overhead bridge crane load quickly run will cause much of a swing. Excessive load swing on-site operations pose a threat to personal safety. Also increases the load and the load swing around the possibility of damage to the goods being. Swinging has become a crane load limit movement of materials to improve the efficiency of a major factor.
Crane brake inspection
Brakes are important parts of the crane, the agencies directly affect the accuracy and reliability of the movement. Therefore, we must carefully check the hoist and luffing two institutions brake condition, observe the opening of the brake shoe friction elements and the wear of the brake pads. Band brake brake band to pay attention to check for cracks in steel backing, whether flexible transmission brake,hoist gantry crane brake frame is intact and the main spring and the auxiliary spring elastic compliance.
Bridge crane track to determine: the dimensions of the goods to be able to pass the legs flat steel frame. Along the mast to meet stability requirements crane track direction. Note that track B and span S proportional relationship, and generally track B = (1/4-1/6) S.
Several crane introduce rehabilitation programs
General
overhead gantry crane for its large carrying capacity, good stability and a series of advantages are widely used in various types of workshops, factories and warehouses. However, the lack of impact of headspace height of overhead cranes, double girder bridge crane particularly important reason to use one. The workshop or factory roof reconstruction is very difficult work; re-build the crane bearing rail beam is put too much, so by the traditional general-purpose
overhead bridge crane structural transformation, reduce machine height, is the most viable solution to this problem methods.
Crane design principles explicitly mentioned in the three basic conditions:
Cranes and mechanical parts metal structure should have sufficient strength, stiffness and resistance to buckling;
Machine must have the necessary stability against overturning;
Prime mover has to meet the requirements of the job performance power brakes provide the necessary braking torque.hoist gantry crane During crane structural transformation, they must meet three basic conditions. Traditional designs were analyzed and found the car above the rail height is the height of the main factors affecting the whole world.
Through its orbit for small frame transformation can reduce machine height. Small frame metal structure change this transformation program will be the biggest feature is the horizontal support surface placed in the car, under the car axle instead of the traditional design will be placed on the supporting surface on top of the car axle. Rack mounted in the car lifting mechanism and other components "hidden" in between the two main beams and shelves trolley car parts below the highest point of the axle.
General overhead crane technology is mature, highlight the advantages. But according to the traditional design of a large crane machine height, in some special occasions can not install and use. Through the transformation of the trolley bridge crane structure can reduce the overall height of the overhead crane applications enhance the breadth. Above describes several rehabilitation programs, and in the actual production in the applications.
Crane design principles explicitly mentioned in the three basic conditions:
Cranes and mechanical parts metal structure should have sufficient strength, stiffness and resistance to buckling;
Machine must have the necessary stability against overturning;
Prime mover has to meet the requirements of the job performance power brakes provide the necessary braking torque.hoist gantry crane During crane structural transformation, they must meet three basic conditions. Traditional designs were analyzed and found the car above the rail height is the height of the main factors affecting the whole world.
Through its orbit for small frame transformation can reduce machine height. Small frame metal structure change this transformation program will be the biggest feature is the horizontal support surface placed in the car, under the car axle instead of the traditional design will be placed on the supporting surface on top of the car axle. Rack mounted in the car lifting mechanism and other components "hidden" in between the two main beams and shelves trolley car parts below the highest point of the axle.
General overhead crane technology is mature, highlight the advantages. But according to the traditional design of a large crane machine height, in some special occasions can not install and use. Through the transformation of the trolley bridge crane structure can reduce the overall height of the overhead crane applications enhance the breadth. Above describes several rehabilitation programs, and in the actual production in the applications.
2013年8月19日星期一
Threaded connection bridge crane demolition methods and precautions
Removing the threaded connection. Threaded connection in the mechanical connection is the most widely, it has a simple, easy to adjust and multiple disassembly and assembly advantages.steel crane Its removal easier, but also often due to inadequate attention, improper selection tools, demolition method is not correct and cause damage. Bridge crane screwed General demolition method is:
First, recognize the thread rotation, use the right tools (wrench, screwdriver sizes match), forced to be uniform. Remove threaded connections generally should not use an extension, only by the force of the special threaded parts, the use of specialized forging wrench, allows the use of extensions. To reduce labor intensity and improve work efficiency, should be adopted motorized wrench. Use special wrench to remove the stud.overhead bridge crane Special circumstances Removing the threaded connections:
1 decapitated screw off the surface and below the body disassembly:
a. the screw drilled into polygonal hardened steel, then screw extruder;
b. decapitated end of the center in drilling, tapping reverse threaded screw screwed into reverse spin out;
c. the screw holes (diameter equivalent to minor diameter), with the same specifications tap tapping; drilling large diameter threaded equivalent, attack large a diameter thread.
2 decapitated screws exposed on the outer surface of the body part of the demolition:
a. at the head sawed off groove with a screwdriver screwed out;overhead gantry crane migraine processed in off the head or square head with a wrench;
b. increase in off the head or nut welded curved rod out;
c. screws thick, use a flat shovel circumferentially excised.
First, recognize the thread rotation, use the right tools (wrench, screwdriver sizes match), forced to be uniform. Remove threaded connections generally should not use an extension, only by the force of the special threaded parts, the use of specialized forging wrench, allows the use of extensions. To reduce labor intensity and improve work efficiency, should be adopted motorized wrench. Use special wrench to remove the stud.overhead bridge crane Special circumstances Removing the threaded connections:
1 decapitated screw off the surface and below the body disassembly:
a. the screw drilled into polygonal hardened steel, then screw extruder;
b. decapitated end of the center in drilling, tapping reverse threaded screw screwed into reverse spin out;
c. the screw holes (diameter equivalent to minor diameter), with the same specifications tap tapping; drilling large diameter threaded equivalent, attack large a diameter thread.
2 decapitated screws exposed on the outer surface of the body part of the demolition:
a. at the head sawed off groove with a screwdriver screwed out;overhead gantry crane migraine processed in off the head or square head with a wrench;
b. increase in off the head or nut welded curved rod out;
c. screws thick, use a flat shovel circumferentially excised.
Crane under what circumstances replace the gear should be scrapped
Check the overhead crane gear has the following defects, should be scrapped Replacement:
1 in the root of the hoisting mechanism of the first gear shaft wear more than 10% of the original thickness of the tooth,hoist gantry crane the rest of the shaft of the gear tooth wear more than the original thickness of the fox;
2 carts (car) the first shaft gear reducer operating agencies wear more than 15% of the original thickness of the tooth,steel crane the rest of the shaft of the gear tooth wear more than the original thickness;
3 open gear wear is greater than 30% of the original tooth thickness;
4 lifting red hot or molten metal, acid,bridge gantry crane explosives, flammable and toxic substances such as crane gear scrapped according to the above criteria accordingly halved;
5 due to the tooth surface and damage the gear pitting face area of more than 30% depth of more than 10% of the tooth thickness;
6 there is a tooth root or a few at the fatigue crack or a broken tooth.
1 in the root of the hoisting mechanism of the first gear shaft wear more than 10% of the original thickness of the tooth,hoist gantry crane the rest of the shaft of the gear tooth wear more than the original thickness of the fox;
2 carts (car) the first shaft gear reducer operating agencies wear more than 15% of the original thickness of the tooth,steel crane the rest of the shaft of the gear tooth wear more than the original thickness;
3 open gear wear is greater than 30% of the original tooth thickness;
4 lifting red hot or molten metal, acid,bridge gantry crane explosives, flammable and toxic substances such as crane gear scrapped according to the above criteria accordingly halved;
5 due to the tooth surface and damage the gear pitting face area of more than 30% depth of more than 10% of the tooth thickness;
6 there is a tooth root or a few at the fatigue crack or a broken tooth.
Lifting tire maintenance process should pay attention to use what issues
Lifting tires for your analysis process should be maintained in the use of primary attention to the following three points:
1 Pressure Normal
The tire pressure must be maintained properly. Pressure is normal, tread contact area with the road,sino hoist bear the load evenly, normal wear and tear, if the pressure was too low, the tire stiffness degradation, bearing deformation after serious because the tire shoulder wear increased local ground deformation will be serious carcass caused fever, fatigue caused by cords, and other early loss carcass stratification; if pressure is too high, will tire stiff, elasticity, cords and broken due to excessive stretching, and because of the ground area smaller, accelerated tire crown local wear and increasing the load per unit area, causing early damage or puncture,overhead bridge crane this phenomenon is particularly serious in summer. Therefore, the driver should pay attention to before work check the tire pressure, insufficient to timely inflated.
2 smooth start-up and shutdown
Machinery at the very start, tire rotation by a sudden standstill, if starting excessive speed, tire and road generates intense friction, can accelerate tread wear. Therefore, construction machinery started, not too much should tie loose clutch and accelerate properly,overhead gantry crane so that the machinery started slowly and smoothly without shaking to avoid dragging the tire and the ground accelerated tread wear.
3 Maintenance timely
Machinery in motion, if there is weakness, operational difficulties, body tilt, abnormal noise, jitter or a burning smell, immediately stop and check tire condition. Way to rest, you should check the tire pressure and temperature is normal, the wheel nut is loose, the tire is being scratched and so on, and carefully check whether the debris embedded in the tread, if it is found to be promptly removed.
1 Pressure Normal
The tire pressure must be maintained properly. Pressure is normal, tread contact area with the road,sino hoist bear the load evenly, normal wear and tear, if the pressure was too low, the tire stiffness degradation, bearing deformation after serious because the tire shoulder wear increased local ground deformation will be serious carcass caused fever, fatigue caused by cords, and other early loss carcass stratification; if pressure is too high, will tire stiff, elasticity, cords and broken due to excessive stretching, and because of the ground area smaller, accelerated tire crown local wear and increasing the load per unit area, causing early damage or puncture,overhead bridge crane this phenomenon is particularly serious in summer. Therefore, the driver should pay attention to before work check the tire pressure, insufficient to timely inflated.
2 smooth start-up and shutdown
Machinery at the very start, tire rotation by a sudden standstill, if starting excessive speed, tire and road generates intense friction, can accelerate tread wear. Therefore, construction machinery started, not too much should tie loose clutch and accelerate properly,overhead gantry crane so that the machinery started slowly and smoothly without shaking to avoid dragging the tire and the ground accelerated tread wear.
3 Maintenance timely
Machinery in motion, if there is weakness, operational difficulties, body tilt, abnormal noise, jitter or a burning smell, immediately stop and check tire condition. Way to rest, you should check the tire pressure and temperature is normal, the wheel nut is loose, the tire is being scratched and so on, and carefully check whether the debris embedded in the tread, if it is found to be promptly removed.
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