2014年1月16日星期四
Overhead crane automatic control jib crane of nonlinear underactuated
Under- drive system is the number of degrees of freedom to control the amount is less than the system of a class bridge gantry crane . By eliminating the parts of the drive system can reduce the complexity of the design , and can effectively reduce the cost or weight of the system itself , and thus the practical application of many of the systems are designed to be under- drive system , such as spacecraft , helicopter , underwater vehicle , satellite, flexible robots ; addition, when a drive failure of some all- drive system when it will become a less drive system. Although UNDERACTUATED bring great convenience features on the system design, manufacture, but it also makes the internal dynamics of the system is more complex, and usually accompanied by a non- complete constraint , so the system control has brought great challenges in recent years, the study of such systems control theory and gradually developed into a research steel crane. Overhead crane is a typical non-linear , strong coupling, due to the drive system , it has a load capacity, flexible operation , significant energy saving , etc., has been widely applied to many areas of industrial production , ports and transportation. In order to improve transport efficiency and safety performance of the cable car system , an urgent need to design a reasonable control strategy to achieve its automatic operation.
2013年9月8日星期日
Why harbor cranes and other lifting must be vertical?
Of course, not just lifting must be perpendicular to the port
bridge gantry crane s, as well as various types of quay cranes and other lifting machinery is so. About a dozen non-lifting cranes, etc., do not know we are not clear? If in doubt, have the opportunity to work with you on it. One of them is not hanging ten: not allowed oblique oblique hanging. There may be some specific reasons people do not quite understand, analyze here with us, so that we can truly understand, remember it from the heart, to ensure the safety of construction operations.
1, oblique hanging may overload
Assuming the weight lifted from the ground as Q of objects, vertical lifting, rope tension is equal to Q S as long as or slightly larger than Q, the weight can leave the ground.
However, if the oblique, and the ground wire to the vertical at an angle. According to mechanics, the role of the tension on the rope S, so that the object can be decomposed into a vertical upward force P and the horizontal movement of the force F, to make the object hanging from the ground, P at least equal to Q. F same as the angle increases. That is,overhead bridge crane the larger the angle oblique hanging in the lifting heavy objects the same time the greater the force rope. So, if a full load when lifting heavy objects vertically, then diagonally hanging inevitable when overload occurs even rope pulled off by accident.
2, oblique hanging produce inertial forces dling personnel
In addition, the oblique hanging horizontal force generated when the F, when the heavy left front also subject to the effects of friction. After leaving the ground a moment, would object to the vertical center of the swing, it is possible and hang hanging personnel, operations personnel, or other objects around the jostling caused by accidents.
Therefore, these two aspects, the oblique oblique lifting overhead gantry crane is absolutely not allowed, making sure the goods required when lifting vertically.
For all types of large construction machinery, every detail needs to be done very close to perfection, this is the basis for future development!
1, oblique hanging may overload
Assuming the weight lifted from the ground as Q of objects, vertical lifting, rope tension is equal to Q S as long as or slightly larger than Q, the weight can leave the ground.
However, if the oblique, and the ground wire to the vertical at an angle. According to mechanics, the role of the tension on the rope S, so that the object can be decomposed into a vertical upward force P and the horizontal movement of the force F, to make the object hanging from the ground, P at least equal to Q. F same as the angle increases. That is,overhead bridge crane the larger the angle oblique hanging in the lifting heavy objects the same time the greater the force rope. So, if a full load when lifting heavy objects vertically, then diagonally hanging inevitable when overload occurs even rope pulled off by accident.
2, oblique hanging produce inertial forces dling personnel
In addition, the oblique hanging horizontal force generated when the F, when the heavy left front also subject to the effects of friction. After leaving the ground a moment, would object to the vertical center of the swing, it is possible and hang hanging personnel, operations personnel, or other objects around the jostling caused by accidents.
Therefore, these two aspects, the oblique oblique lifting overhead gantry crane is absolutely not allowed, making sure the goods required when lifting vertically.
For all types of large construction machinery, every detail needs to be done very close to perfection, this is the basis for future development!
Several classifications Port Machinery
Port machinery we all know , this is only for certain machinery a general term which refers not just mechanical . For example , port
hoist gantry crane , quay cranes , harbor cranes, etc. belong to the port machinery . In order to better understand them , understand them , or to better manage them, we often classify them . The current classification is usually this: the composition of the unit body shape , rod connected to the external load and structure as well as the mutual position in space , three.
1, where unit body shape can be divided according to the following three :
Rod structure which is a combination of many rod member , and each rod member is characterized by a height, width , and a length great .
The lever itself can either be a general steel, it can be thin-walled structure . Thin-walled structure, which means the body is characterized by a width, length is large, while the thickness is very small, such as sheet metal , shell and thin-walled parts . Such structures such as bridge gantry crane metal structure in the promotion of the use , there will be a very significant value .
Physical structure , the main features of this structure is that the length, width , and high measure of those who have similar structures . This structure in the metal structure of the crane hardly been used.
2, according to rod connected to the situation can be divided into three categories:
Hinge structure , two or more rods coupled to the node point is called , assuming all nodes in the structure are ideal cylindrical articulation , the lever only by the axial force , called the hinge structure of this structure .
Rigid structure, the structure of the nodes are rigid, cross at a junction to a relative displacement of the lever can not , can not occur relative rotation therebetween. Therefore, under external loads , steel generally produce moment, shear and axial force , bending moment which dominated .
Hybrid structure, the structure of both the articulation nodes , there are rigid , hinged lever only by the axial force , steel ground rod is subject to both a bending moment , shear and axial force .
3 , according to the external load and the mutual position of the spatial structure can be divided into two categories :
Planar structure , such as the role and structure of all elements of the load axis of the lever are in the same plane , i.e., structure analysis and calculation carried out only to the plane of the force system , is called the planar structure.
Spatial structure , such as the composition and structure of the applied loads axis of the lever is not in the same plane , then the structure analysis for calculation of force system according to space ,steel crane is called the spatial structure .
Many people may read these are not very clear, but when you carefully read or engaged in this industry, then for this understanding is a must. We need a clear structure and context, so that we can see at a glance which category this machine , the mechanical advantage of the presence in what ? I believe this is what we want !
1, where unit body shape can be divided according to the following three :
Rod structure which is a combination of many rod member , and each rod member is characterized by a height, width , and a length great .
The lever itself can either be a general steel, it can be thin-walled structure . Thin-walled structure, which means the body is characterized by a width, length is large, while the thickness is very small, such as sheet metal , shell and thin-walled parts . Such structures such as bridge gantry crane metal structure in the promotion of the use , there will be a very significant value .
Physical structure , the main features of this structure is that the length, width , and high measure of those who have similar structures . This structure in the metal structure of the crane hardly been used.
2, according to rod connected to the situation can be divided into three categories:
Hinge structure , two or more rods coupled to the node point is called , assuming all nodes in the structure are ideal cylindrical articulation , the lever only by the axial force , called the hinge structure of this structure .
Rigid structure, the structure of the nodes are rigid, cross at a junction to a relative displacement of the lever can not , can not occur relative rotation therebetween. Therefore, under external loads , steel generally produce moment, shear and axial force , bending moment which dominated .
Hybrid structure, the structure of both the articulation nodes , there are rigid , hinged lever only by the axial force , steel ground rod is subject to both a bending moment , shear and axial force .
3 , according to the external load and the mutual position of the spatial structure can be divided into two categories :
Planar structure , such as the role and structure of all elements of the load axis of the lever are in the same plane , i.e., structure analysis and calculation carried out only to the plane of the force system , is called the planar structure.
Spatial structure , such as the composition and structure of the applied loads axis of the lever is not in the same plane , then the structure analysis for calculation of force system according to space ,steel crane is called the spatial structure .
Many people may read these are not very clear, but when you carefully read or engaged in this industry, then for this understanding is a must. We need a clear structure and context, so that we can see at a glance which category this machine , the mechanical advantage of the presence in what ? I believe this is what we want !
Overhead crane handling precautions
With the continuous development of China's machinery industry, the development of the crane is also very fast. Now, the
hoist gantry crane is very widely used in the country, for example in the mining industry, the construction industry and so on. Bridge crane itself belongs to the state of special equipment, so in operation, we should pay more attention to avoid unnecessary accidents. Following small and brief you on the bridge crane operator should pay attention to several issues:
First, we have before the operation, first ensure that the work area must be flat, solid, no potholes place;
Second, the steel crane in the job, you must first trial hanging.
Third, bridge cranes when the job must be kept vertical lifting rope, to avoid accidents.
Fourth, the bridge crane hook and pulley should maintain a certain distance between, especially in the height of the heavy lifting when, so to avoid windlass too far, to prevent the wire pulled off, so that the boom after the turn.
Fifth, in the job, workers should be noted that the legs must not be manipulated through the flip handle, hanging objects should be first first down, again adjusted.
Sixth, the operator can not just lift heavy objects on the ground, so that may cause overload operation, causing an accident.
Seventh, the starter in the rain and snow bridge work, employees must pay more attention to the job.
Above is Xiaobian to introduce a few on the bridge gantry crane in operation precautions, I hope that it helps.
First, we have before the operation, first ensure that the work area must be flat, solid, no potholes place;
Second, the steel crane in the job, you must first trial hanging.
Third, bridge cranes when the job must be kept vertical lifting rope, to avoid accidents.
Fourth, the bridge crane hook and pulley should maintain a certain distance between, especially in the height of the heavy lifting when, so to avoid windlass too far, to prevent the wire pulled off, so that the boom after the turn.
Fifth, in the job, workers should be noted that the legs must not be manipulated through the flip handle, hanging objects should be first first down, again adjusted.
Sixth, the operator can not just lift heavy objects on the ground, so that may cause overload operation, causing an accident.
Seventh, the starter in the rain and snow bridge work, employees must pay more attention to the job.
Above is Xiaobian to introduce a few on the bridge gantry crane in operation precautions, I hope that it helps.
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 : 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 .
2013年8月28日星期三
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
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. "
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.
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.
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.
"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.
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 - 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.
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.
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