Hoist bridge crane

Gourd refers to electric hoist bridge crane for lifting mechanism of bridge crane, mainly for small tonnage (less than 10 t) and use frequency sino hoist lifting work sites. Because of its convenient operation and maintenance, lightweight flexible, price is low, so in the light industry, chemical industry, machinery and other industries are widely used in lifting operation. This kind of crane is the ground operation more, generally a professional life is the number, or do not need specialized personnel operation, so the scene, there are many unsafe hidden trouble easily. Of course, not only the hoist bridge crane prone to hidden trouble, some hoist gantry crane types of crane is the existence of insecurity. Lifting equipment common accident features: accident consequences; Accidents have frequent sex, concentration and sudden; The accident types associated with the kinds of hoisting equipment; Accident injury crisis of range and concentration. Caused the main reason of the accident has the following several aspects: mechanical operation personnel in operation and maintenance of the violations; The negative impact of the mechanical work environment in there are obstacles on the run, for example, in the job site along with high; Mechanical equipment itself safety performance is not good. It might be against standard design, manufacture or installation problems left by the bad; Natural phenomena occur suddenly. Such as earthquakes, floods, etc.

Simulate the crane work

With traditional two-dimensional CAD design of crane time cycle is long, repeated design, product innovation is insufficient, the engineer's design experience is not very good inheritance, makes the design efficiency of series of products is not ideal. Bridge crane is designed to experience of design, development, evaluation, manufacturing cycle repeatedly, the process time is long, and the design cost is high, the efficiency is low, the risk is big. And the sino hoist of modular design, through the component level, generalization and standardization can simplify the product structure, make the product diversification. At the same time using the parameterized design of gantry crane and 3 d parametric modeling technology, can reduce repeated labor and improve the design efficiency, make products to satisfy user needs. At the same time using an interactive simulation technology, the bridge crane driver's operating system can be virtual simulation, set up the corresponding effects, truly simulate the crane work and working conditions, to predict the potential risks in the working process of the bridge crane, and can improve the work efficiency of bridge crane.hoist gantry crane as interactive simulation tool, has great advantages in terms of interactive simulation. Through the, can realize the keyboard to control the 3 d model and the man-machine interaction effect because of the bridge crane bridge block design.

The structure adopts steel structure industrial building

At present, most of the industrial hoist gantry crane structure adopts steel structure, all kinds of span, the cross section of the steel crane beam needs more and more. Compared with more than 10 years ago, when the steel crane beam in the design of product quality requirements, especially further strict to the requirement of welding quality; And, because the owners of construction period limit makes the steel crane beam production cycle have to further compression; Second, due to the increasingly fierce competition in steel structure manufacturing, make the bid have been almost zero profit in the competition, all contractors have to excavate the potential to reduce the steel crane cost from various channels. Steel crane beam is one of my company's main steel structure products, accounting for about 50% of the annual steel structure manufacturing tasks. My company to undertake the EGang cold rolled sheet plant engineering main factory main rolling across different and finished 1/3 blocks of steel crane beam installation tasks, a total of 64, including 15 m across 56 root, 9 m across 4, 2.2 welding position: CO gas shielded welding using short 2 road transition welding, suitable for flat, vertical, horizontal, and all position welding. 2.3 current density, current density is high, the molten drops high fusion rate and is suitable for the welding process of single-sided double-sided forming. 2.4 welding deformation, heat concentration, heat affected zone 21 m across four root; Material Q235 - C 32, small wood, after welding deformation is small.

The safe operation of the enterprise lifting equipment

Hoisting equipment safe operation of township enterprises existing problems and countermeasures of the economic system reform continued to deepen, the villages and towns set is common, according to the statistics data show that about 70% of body economy got a rapid development, the production steel crane the traffic, electricity enterprise lifting equipment operators without card mount guard. Ladder, the big increase in the number of tower crane and other lifting equipment. But the technical force is weak, the personnel quality is poor. Village and township enterprises, due to many hoist gantry crane enterprises do not know the lifting equipment safety industry from staff to management, most without technical management technology, the hoisting equipment purchase, installation, operation and management training to mount guard work, technical quality is poor, lack of lifting equipment, there are a lot of problems, lifting equipment accidents frequently maintenance knowledge, to repair and maintenance, lifting equipment is not happening. Statistics show that from 1990 to 1995, the city leads to lifting equipment often run in spite of illness. Township enterprises lifting equipment by less than three hundred to three hundred in order to ensure the safety of the hoisting equipment of township enterprises economy more than five hundred; Lifting equipment accident of inductrial injury accident caused by the operation, do well the safety in production, promote enterprise development, improve the rate from 2% to 2%. Hoisting equipment accident rapid economic benefits, the author thinks that must do the following work: speed increase, not only seriously affected the normal production of township enterprises to strengthen publicity and education, increase awareness of production safety.

Lifting machinery safety procedures

Lifting machinery safetysteel crane have been enacted 25 years of GB/T6067-1985 "hoisting machinery safety regulation, in June 1, 2011 by GB6067.1-2010" hoisting machinery safety procedures part 1: general rules "(hereinafter referred to as the new rules) replacement, the new rules focus on system safety, to adapt to the application of new technology, new material and update of the standards, in line with international standards. The new regulations as a hoist gantry crane national standards, to improve lifting machinery safety requirements, to reduce the lifting accident rate and ensure the safe operation of the hoisting machinery, will play a positive role in promoting. The new regulations mainly has the following characteristics. To adapt to the extensive and comprehensive system the new procedure from system concept, highlight the partition of security system and induction, is a adapt to the extensive and comprehensive system of hoisting machinery safety technical guidance. First of all, the new regulations applicable to the design, manufacture, installation, alteration, maintenance, use, scrap, check and so on eight aspects, than in the past the old rules added three parts installation, modification, maintenance. Secondly, the new regulations in order to adapt to the special requirements of various types of lifting machinery safety technology, considering from the function of the hoisting machinery and institutional characteristics, the old rules broken down into seven parts, the first part is the general rules; The second part as mobile crane; The third part is the tower crane.

The basic construction of bridge crane is the same as the hook bridge crane

The basic construction of bridge crane is the same as the hook bridge crane, the difference is on the hook to hang a dc lifting hoist gantry crane (also known as the electromagnetic sucker), used for lifting with magnetic conductivity of ferrous metals and their products. Usually after in bridge walked electric generating set on the stage or in a driver indoor SCR dc to ac power to dc power supply, and then through the trolley frame of special cable drum, dc power supply with flexible cable to lifting electromagnet. Bridge crane bridge crane has three types: grab hook bridge crane, electromagnetic hook bridge crane grab and electromagnetism bridge crane. Its characteristic is everywhere in one car is equipped with two sets of independent lifting mechanism, a set of grab bucket, a hook with (or a set of steel crane chuck with a hook, or a grab for magnetic chuck with a set of use). According to the need can use hook lifting heavy objects, and can also be on the hook to hang a motor grab unloading material, also can unload the grab to hang black metal disk lifting, so called three bridge (renewable) using a crane. As a result, the models must be the same with electromagnetism bridge crane, set up the electric generator or SCR dc power box. This kind of crane is applicable to often change for plant material place. Double bridge crane this crane and hook bridge crane basic same, just the bridge rack is equipped with 2 sets up the same weight of the car. This model used for lifting and handling elongated objects.

Crane controller

If compared the behavior of the crane to a single pendulum, then experienced crane operators can eliminate many payload oscillation caused slowdown in the process of oscillation, cancel the hoist gantry crane process of oscillation. However, some types of payloads and rigging double in these conditions, dynamic so even skilled operation manual method of eliminating oscillation become very difficult. As a result, some researchers have suggested increasing feedback control to suppress the double pendulum is dynamic. The steel crane of using feedback control, due to the difficult to measure the payload of the bill. Therefore, this article does not advocate feedback control, but the shape control command, don't need sensors. Crane controller, is actually the real-time vibration suppression, it must be produced from human command signal to filter out unnecessary incentives. Such changes can be generated by convolution with humans a command signal pulse sequence. Convolution results, and then used to drive the crane motor. Driving crane.

Bridge crane is horizontal plane in workshop, warehouse and yard over the material lifting hoisting equipment

Bridge crane is horizontal plane in workshop, warehouse and yard over the material lifting hoisting equipment. Because of its ends located in tall cement posts or metal stents, shape like bridge. Bridge hoist gantry crane bridge along the laid on on both sides of the elevated rail longitudinal operation, can make full use of bridge the space below the lifting materials, from the ground equipment obstacles. Used in construction hoisting machinery, according to its structure and properties of different, general can be divided into small light lifting equipment, bridge type hoisting machinery and boom type crane three categories. Small light lifting equipment such as: jack, hoist, winch, etc. Bridge type hoisting machinery such as beam cranes, steel crane crane, etc. Boom type crane such as fixed slewing crane, tower crane, truck crane, tires, crawler cranes, etc. The following is a kind of hoisting machinery of: (1) mechanical truck crane hydraulic truck crane crane all terrain off-road vehicle (2) tower crane crane rail type rotary tower crane rail type rotary ZiSheng on tower crane rail under the rotary tower crane rail type rotary ZiSheng tower crane fast loading type tower crane tower crane car tyre combination tower crane crawler tower crane tower crane (3) the crawler crane crawler machinery hydraulic crawler crane crawler crane electric hoist mast crane cable type mast crane sprag type mast crane cable crane radiant cable crane translation type cable crane type cable crane

Bridge crane is very widely used in industrial and mining enterprises, a kind of hoisting machinery, bridge crane, and more than a locomotives now attachment

Bridge crane is very widely used in industrial and mining enterprises, a kind of hoisting machinery, bridge crane, and more than a locomotives now attachment, use frequently, every day a lot of work. Bridge crane can work directly affect the completion of tasks of locomotive overhaul and the safety of person and equipment. Drag the original use of bridge crane system consists of wound rotor ac asynchronous motor, the rotor resistance multistage speed regulation in the series circuit, the CAM controller, the relay - hoist gantry crane control, the main shortcomings of this control system is: the motor rotor series resistance speed governing energy consumption type of slip speed regulation, large energy consumption and mechanical properties of soft, small range of speed regulation, and the smoothness is poor; Mechanical shock, steel crane the service life; Therefore, only completely change the way the original speed regulation can fundamentally solve the problem of bridge crane high failure rate. With the rapid development of electronic technology, frequency conversion speed governor performance, reliability, all had the very big enhancement, for its application in bridge crane drive system provides favorable conditions. We first for locomotive diesel engine assembling important work to 32 tons bridge crane frame of the big car drag system and hook system for frequency conversion transformation, to improve its operating performance, reduce the failure rate.

Work type and weight of the crane are two different concepts

Work type and weight of the crane are two different concepts, the weight is big, not necessarily is heavy, the weight is small, also is not necessarily the light level. Such as water power station with the crane lifting weight of hundreds of tons, but very few use opportunity, is only used when installing unit and repair unit, the rest of the time is down there, so even though the weight is very big, but still belongs to the light level. And as the station yard gantry hoist gantry crane, while the weight is not big, but the job is busy, belong to the type of heavy work. Crane type of work and safety performance has a very close relationship. Lifting weight, span, lifting height of the same crane, if different type of work, in designing and steel crane, the safety factor is not taken by the same, or different parts model, size, specification. Brake, due to the different type of work, such as wire rope safety coefficient of different levels (light safety coefficient is small, heavy security coefficient), selected models is not the same. As is 10 t bridge crane, again for the work of the intermediate type (JC = 25%) of the hoisting motor power for N = 16 KW, for the heavy work types (JC = 40%) hoisting motor power is N = 23.5 KW.

Loader job working device should be able to guarantee

Loader job working device should be able to guarantee: when turning cylinder are blocking,sino hoist arm oil cylinder lifting or landing, up and down link mechanism make the bucket translation or close to translation, to avoid tilt bucket and scattered material; When the movable arm in any location, bucket spinning the movable arm hinge point hoist gantry crane during discharging, bucket Angle is not less than

45 °, movable arm fall after unloading and can make the bucket flat automatically.

Cantilever crane

Cantilever crane steel crane main use of boom keep out appearance around the vertical axis of rotation (pitch) cooperate with lifting goods, using flexible action, meet the requirement of loading and unloading, and its form has fixed, mobile and floating. Cantilever crane sino hoist crane main use of boom keep out appearance around the vertical axis of rotation (pitch) cooperate with lifting goods, using flexible action, meet the requirement of loading and unloading, and its form has fixed, mobile and floating.

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!

Wharf cranes crane equipment such as the lack of development

Although in recent years the construction, port construction implementation, wharf cranes and other  sino hoist  equipment have been relatively rapid development. But in the rapid development, we still need to know that we exist some shortcomings, after all, only the presence of such awareness, enterprises or individuals, what we need to know. Understand their own disadvantages and advantages to be able to truly realize their own progress and development.
1, the domestic equipment manufacturing enterprises crane overall design of the low level, especially in innovative design ability, mostly stay in the imitation stage, the product level is difficult to improve.
2, the market most of the small scale enterprises hanged machine, subject to market constraints, some companies generally do not have to take it as a major product development, manufacturing processes and equipment generally lag behind.
3, from the point of view of product marketing in recent years, a lot of product quality, but off, poor reliability, resulting in high failure rate, hoist gantry crane  safety has become a topic of concern to society in general.
4, cab and interior design has long been a weak link in crane design, supporting industries lack of capacity also affects the overall level of product improvement.
5, product specifications less, generally only 1 to 2 business sizes, it is difficult to meet the needs of various users at home and abroad. In addition, the product update cycle is long, some enterprises for product upgrading is not enough emphasis.
6, technical services are not in place, the level is not high, the lack of an effective technology to track products. In products and services, domestic enterprises and foreign crane larger than the gap, but also improve the comprehensive service system.
7, as in recent years, rising raw material prices, the manufacturing cost is high.
     In the face of these developments lack of  steel crane  equipment, crane manufacturing enterprises should integrate research efforts for technological breakthroughs, improved product mix; facilitate planning of production, reducing costs; while enhancing quality of products and services, I believe so, China's crane equipment development will be more rapid, open foreign markets to occupy foreign markets just round the corner.

Wharf crane operation three small dots Precautions

 Today begins the pier quay  hoist gantry crane  outside many occasions together, in order to ensure safe operation, afar as we propose three small dots requirements, to help you while avoiding disadvantages, better use of crane equipment.
1, lifting site selection should be appropriate
     Operation should be smooth lifting spacious venue selection, ease of accidents, the timely evacuation of danger zones.
2, the lifting process should establish stable fixed point
     To confirm the operation, stable foothold: standing mechanical equipment and lifting objects stacked,overhead gantry crane you should pay attention to the foot without slipping and tripping hazards.
3, lifting position should avoid harmful
     Operation should avoid the loss of ability to function in the direction as lifting heavy objects that could fall in operation or slipped, asymmetrical lifting will produce a swing and rotation, hanging objects running there kinetic energy. Therefore, the operator hung suspended in the need to avoid the attention and directing these harmful orientation.
     Wharf  overhead bridge crane  operation errors caused by security incidents are not uncommon, we must not empirically work, pay more attention to the operation is an effective means of avoiding accidents.

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 !

Crane Hydraulic System Attention five-point problem

At present, China is basically a hydraulic  overhead bridge crane  as their motivation to work, so there are many internal parts of the crane hydraulics. The normal operation of the hydraulic unit is the basic crane working key. Therefore, if there is no operation and maintenance in accordance with prescribed rules, on the one hand, causing the crane does not work properly run. On the other hand, may also greatly reduce engine life. Therefore, in our daily work operations, you should look at five questions:
First, we work, we must first check the mailbox crane hydraulic oil is not adequate, if not enough, it should be added immediately. In addition, the refueling time, we must proceed from a strainer to join, but can not add other brands of hydraulic oil;
Second, the oil filter cartridge job almost ten days or so, it shall be checked, if necessary to carry out cleaning and replacement;
Third, the hydraulic tank fifteen days will put out the oil from below and remove impurities. In addition, when the  overhead gantry crane  work for a year, I want to replace all the hydraulic oil tank.
Fourth, there are many crane hydraulics valve is not the same as they had before the manufacturing factory after various experiments tune just the flow and pressure when in operation do not easily rotated, so as to avoid the machine failure.
Fifth, after each job, remember to clean the hydraulic unit.
steel cranes need our routine maintenance when the job should comply professional charters to avoid some of the accidents.

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.

Crane fault diagnosis technology development

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 .

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.

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.

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 .

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.

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.

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.

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.

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. "

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. "

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.

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."

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.

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.

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.

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.

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.

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.

"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.

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. "

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.