Truss gantry crane

With light weight , small frontal area , large carrying capacity and other characteristics, are widely used in factories , railway stations , ports, power plants, construction sites and other steel crane areas of production. Rationality and reliability of its security architecture design , and the ability to work directly determines the efficiency of the crane . Now most companies by virtue of experience to design truss gantry crane , the utilization of steel is low, and detailed design calculations and relatively cumbersome. Therefore, the steel truss crane design and analysis , has become the focus of design in the field of research , and the main beam is a major part of the door frame . In this paper, the use of modern design methods, lifting the total mass of 60 t, span 40 m, lifting height of 16 m, main beam structure hoist gantry crane working-level A3 truss gantry crane optimization. Main beam structure optimization mathematical model of optimization objective function optimization goals gantry crane metal structure is the total mass of the smallest structure itself , which is a parameter VOLUME minimum value . Design variables need to optimize the design variables are independent variables objective function and state function . Optimization process is optimized by constantly changing variable values ​​to achieve. Truss girder gantry crane main components, mainly steel, link8 unit can be modeled .

Vertical and horizontal gantry crane dynamic stiffness

Vertical and horizontal gantry crane dynamic stiffness Ge-Ning Xu . Tsui Hark Jin ( Department of Mechanical Engineering ) Abstract gantry cranes for different types of vibration analysis conducted research , presented a series of practical formulas gantry crane vertical and horizontal dynamic stiffness , add a calculation method static and hoist gantry crane dynamic stiffness , expanding the door crane static , dynamic stiffness range checking for gantry crane characteristics and analysis of existing research data , it is recommended that the static and dynamic stiffness control value for the realization of dynamic design gantry crane has created favorable conditions . Keywords gantry crane , the dynamic stiffness of the CLC TH2; TU390 Introduction gantry cranes (the door ) is an important Lifting Equipment Yard steel crane national economic departments , warehouses and assembly plant widely used , it can be divided into single girder trolley hoist gantry crane and standard double girder gantry crane trolley two types , with the corresponding divided into single and double girder gantry girder gantry two structural types ( Figure 1 (c), 1 (e) and 1 (d)), divided into a leg frame (Fig. 1 (c), 1 (d)) and L (Fig. 1 (e). door according to the size of the span。

Common Assembly hoist crane

Bridge crane assembly is a very common means of transport, in ports, warehouses , construction sites and other places have been widely used. However at runtime overhead crane , trolley load swing caused by the games , which would reduce the efficiency of oscillating the one hand, the crane system , and on the other hand may cause the load of the operator or other steel crane objects caused by injury or collision loss. Therefore, many scholars overhead crane system controls a lot of research work : ask the car quickly and accurately reach the target position , on the other hand also requires the ability to effectively suppress the swinging of the load. The most common method of controlling open loop overhead crane shaping the input (Input Shaping), but this method requires high precision of the system parameters , and thus more hoist gantry crane to solve the closed-loop control and suppress the swing carriage positioning problems. Chang et fuzzy logic main bridge crane in a position to meet the accuracy requirements of the swing angle suppression . Fang Yong, et al pure energy -based control method , by increasing the dynamic coupling between the trolley and the load characteristics to achieve good control of the cable car system ; several advanced nonlinear control methods which are applied to the overhead crane system .

Introduction to the electric hoist gantry crane girder production technology (box)

With the continuous development of social hoist gantry crane development, the manufacturing level has been rapidly improving. Electric hoist gantry crane is an indispensable equipment in building materials market, the manufacturing quality of high and low, directly affect its performance. Especially the metal structure manufacturing quality, plays an vital role in the safe use. Now to the rated lifting a total quality of 10 t electric hoist gantry crane as a case, introduced the production technology, hoping to play a good reference for similar projects. The related technical parameters are as follows: electric hoist gantry crane: rated lifting the quality of 10 t; Design chief, 36 m; Door leg span 24 m; Hoisting height 9 m; The beam width 6 m; Single girder structure, the door legs into the "eight" glyph stress; 4 wheel bearing, two-wheel driven. Whole steel crane body into the box structure is long and narrow shape, the girder web plate thickness is thinner, weld, and mainly concentrated in the top side, large amount of welding. Which is the most difficult to control point is: the main girder camber, web verticality, lateral bending, and 24 m span. Because the making craft of main girder has certain representativeness, door for other structures such as beam under rigid legs, manufacturing has important reference, in the only for the three of the crane structure of main girder of the production process, talk about manufacturing technology and quality control.

The safety of the crane operation technical requirements

Crane belongs to a large hoisting equipment, if the operation is easy to be imprudent man-made accidents, so care must be taken in the operation, the safety of the follow certain principles. Below is to explain the safety of the crane operational technical requirements:
1) check 怍 industry field. The field to flat, can not have inclination and muddy. Flexible leg, work with plate bearing (board size is 400 x 400 x 400 mm). The scope of work you have plenty of hoisting, rotary space.
2) and leg: put a leg, you must hoist gantry crane put telescopic legs after put lifting leg, the leg in a horizontal direction stretch out first, and then to leg down to the ground, until when will frame set up; For legs, you must first accept lifting leg contraction after telescopic leg. Order release can't mistake, otherwise, will produce the oil pipeline rupture or other accidents such as adjust the leg in the lifting operation, should be steel crane again after unloading, it is strictly prohibited to lifting weights adjustment after a hurricane.
3) homework before, it was with tightened hand brake, the gear lever in the neutral. Start the engine preheating operation to normal temperature.
4) for air brake of heavy machine, assignments, climb to 600 kpa pressure, turn the gas shift control valve, the oil pump operation. To adopt pump in diesel engine under no-load running rapidly after 2 min, before lifting operations.
5) before each assignment will try hanging, namely a heavy lift off the ground 50-100 - mm, inspection and the reliability of the actuator, estimated load condition, monitor the stability of the leg. Such as cushion flat leg below rough available block, block size is not less than 400 * 400 * 80 mm.
6) during the lifting operations, steel wire rope should be kept vertical, are not allowed to be inclined and horizontal hanging, lest the machine capsized.
7) when punching bag high weight, asked the hook with a pulley should keep a certain distance, in case of winding limiter failure caused by wire rope tensile or rear suspension arm. To not drop limit position limiter crane, steel wire rope on the drum is allowed to put all in work, should retain 2 ~ 3 laps, to end off the prevention and control of wire rope.
8) general crane boom in the front fan arc zone can't operation, as shown in figure 4, 23. But there is my factory production of truck crane, double H leg, additional fifth leg, namely after the first leg, expand its operating area, can achieve 360 ° full rotation

The safety of the crane is used

Overview of a certain steel company mainspan no.2 steelmaking plant a hook bridge crane hoisting the steel slag, caused by secondary hook header to vice hook to hang spreader collision girder falling, applied on the surface of the hit to death a line homework personnel. At the scene of the accident to a steel mill mainspan, engaged in hoist gantry crane transportation operations lifting equipment is a hook double beam crane, crane rated lifting weight G = 30/10 t S = 19.5 m, span, lifting height H = 16 m, lifting speed.vn = 7.5 n/min, the crane cart running speed vitamin k = 87.6 m/min, the car speed vitamin k = 42.4 m/min, crane work volume for the A5. Accident process for a crane driver at the end of a set of the lifting process, vice hook back, move the hook to assignments, a vice steel crane in the ascent of the at the same time, moved the main hook of crane load, and all the attention focused on the main hook run down, and did not pay attention to pair of hook lifting operation, the secondary hook collision with girder summit, vice hook hook line's fall from 16 m altitude and hit the ground line personnel b, caused b serious accident died on the spot.

Crane (car) of the wheel rim contact with the side of the track

Crane (car) of the wheel rim contact with the side of the track, friction and wear in the running process of a kind of phenomenon. Wheel steel crane and the theory of unilateral clearance on the side of the track can generally be classified as 5 ~ 15 mm, as long as crane (car) in the process of running wheels horizontal offset is greater than this value, gnaw rail occurs, it is gnaw rail boundary conditions. Gnaw rail serious when although crane can not continue to use, but flange and rail friction will increase, will affect the service life of some components, to use causes pecuniary loss to unit. For sino hoist span bridge crane, due to factors such as manufacturing, car easy to gnaw rail accidents. Based on this, this paper analyzes the reasons of large span thin sorghum gnaw rail, put forward the corresponding countermeasures and improvement methods is very necessary. Bridge crane gnaw rail car cause analysis for large size hook bridge crane, in the use of more than a year later, often find crane gnaw rail car phenomenon, and all is the car outside rim gnaw rail to readjust the car wheel after the parallelism and perpendicularity to conform to the requirements, still did not solve the problem.

Crane beam is the subgrade support girder vehicle running

Crane beam is the subgrade support girder vehicle running, used in steel structure factory building. Crane rail crane beam, truss car by driving back and forth on the crane beam orbit. Like steel crane beam, the difference between crane beam web plate welding with steel crane plate, provide support for lift girder car lifting heavy objects. Welding crane beam flange plate of the appropriate USES a layer of steel plate, when two layers of steel plate is used, the outer plate should be along the long Liang Tong Settings, and in the design and construction sino hoist should be taken to make the top flange closely contact with two layers of steel plate. Supporting clamp or rigid material rake hard hook crane and similar structure, truss and brake truss crane is unfavorable use. Crane Liang Yi flange or web of welding arc plates with stitching should be adopted and lead plate, penetration butt weld arc plate and lead plate cutting place should be polished smooth. Crane beam welding and welding construction crane truss segment splicing welding should be adopted or friction type high strength bolt connection.

Simple beam bridge crane type

imple beam bridge crane type:

Hot metal ladle crane: used for lifting into the mixer, the molten steel into concast steel furnace and lifting equipment or ingot mould etc. Main car lifting bucket, deputy car to steel crane bucket and so on auxiliary work.

Clamp crane: use clamp to high temperature steel ingot vertically to the pit in soaking pit, or put it out in the ingot of the car.

Stripping crane: for the ingot from the ingot mould forced out. Car have special stripping device, stripping way according to the shape of the mold, some with pole pin ingot ingot crane, use tongs to lodge a mold; Some use tongs pressure mold, with a small pliers ingot.

Loading crane: for the charge to the open hearth furnace. Main car column bottom is equipped with ram, to stir up inside the container and send it to charging. The main column around the vertical axis rotation, ram can be bobbing up and down and turning. Vice car used to repair the furnace sino hoist as auxiliary operations.

Forging crane: to cooperate with hydraulic press forging large workpiece. Main car hanging on the hook special feeder, turned to support and artifacts; The car used to lift the artifacts.

Earthwork loader bucket structure

Earthwork loader bucket structure, its bucket body commonly used lowsteel crane , wear-resisting, high strength steel plate welding, cutting edge adopts wear-resisting of manganese in steel materials, side cutting edges and strengthen the Angle plate are made from sino hoist strength wear resistant steel materials.

The steel crane beam

One part of the steel crane beam system design. The steel crane beam is for bridge crane steel components. Crane beam type load on the crane beam and action are: crane vertical load, horizontal and vertical horizontal load, crane repair platform of live load, the part weight of crane beam system, supporting the roof structure of the crane beam system load and wall frame structure. Based on the hoist gantry crane of the steel crane beam damage reason in service, this paper discusses the current steel crane beam design and the difference of the actual stress and its harm, put forward the problems existing in the current in the design of the steel crane beam, and studied and analyzed the existing problems and the breakage of the beam in the design of beam and results in the decrease of its reliability.

Concrete machinery industry consolidation to accelerate

China Construction Machinery Industry Association Concrete  bridge gantry crane  Branch of the past 10 years statistics show that China's holdings of concrete machinery mainly include: 50m3 / h above the mixing station (F) 33931, 44993 concrete pump station, pump 39,889 units, mixer truck 228,822 units; 350L concrete mixer over 200,721 units, reached a total of 548,356 units. The actual construction of the statistics show that a lot of mixing stations produce less than 50% of design capacity.
Although the rate of production is not high, but the industry development prospects of low-threshold access and still continues to attract investors to enter, while the concrete  hoist gantry crane  industry upstream customers, their bargaining power is gradually strengthened.
Concrete manufacturing companies, construction units, and leasing concrete machinery industry accounted for about 80% of the purchasing market share. With conch, landscapes, Jidong, Yatai, Huaxin, China Resources Cement and other large enterprises have entered the concrete market, the company's strong organizational performance and cost advantages will bring new competition; On the other hand, local industries and enterprises concentration is increasing, such as Shanghai construction Group, and its subsidiary companies accounted for the total production of concrete concrete in Shanghai 30% of total market share, which will further enhance the bargaining power of buyers, the size of concrete machinery products, quality and service will also put forward higher requirements.
Throughout 2013, we expect concrete  steel crane  industry consolidation will further exacerbate the product will also provide lightweight, large-scale, high-end, integrated direction. But this also brings another problem --- new machine sales space will be further squeezed upgrading products. Those that produce small, but the high cost of SME, you need to leading enterprises under the law of diminishing marginal utility, to seek a breakthrough in market segments.

2013 Construction Machinery difficult transition ahead to where?

Chinese economy continues to decline, the construction  steel crane  market worse. First half of the construction machinery industry in the voices of doubt in the market difficulties ahead. Infrastructure projects, real estate projects 3 years experience pick up weak, sluggish construction machinery enterprises in the development of enterprises in the reflection direction. No sunset industry only sunset business, how to stand out from the weak market. Construction machinery enterprises in transition to where?

   Chase "niche market" clinging to the main industry

German SMEs are called "pearls scattered all over Germany," their way of life may bring us some enlightenment. German professor Hermann Simon 1996 publication of "hidden champions: from around 500 outstanding enterprises unknown revelation," a book that will attract world attention to the obscurity of these German companies: their scattered throughout Germany and numerous , small, mostly family-owned businesses, low-key acting in their respective market segments are veritable leader. These "hidden champions" The reason why people have long been neglected, an important reason is that their products there are only a part of the terminal consumer products,hoist gantry crane such as car sunroof parts; others are very easy to overlook small, such as buttons or drink label on the bottle. Frankfurt University of Finance and Economics Management Bowflex experts pointed out that Germany is a significant feature of SMEs in its products often for the "niche market", it is difficult to know by the public. However, once the German companies with strong manufacturing technology in the market segments to establish quality advantage, they will continue to increase investment in research through innovation to consolidate and expand the lead. For the German family-owned enterprises, the presence of family members, the company's management for the company's business objectives with long-term considerations, not because of short-term performance pressure to give up long-term goals. German companies generally have dedication.bridge gantry crane Once you enter a trade, they will single-minded focus on this will not be because other sectors "money scene" better and make a fresh start, or a variety of business. This undoubtedly is their success.

Improve value-added engineering machinery products division

As we all know , domestic engineering  sino hoist  products due to low-tech products , low added value and criticized . The value-added products to improve construction machinery , engineering machinery enterprises should start with the following points . First, the construction machinery manufacturing enterprises should enhance the manufacturing process to start, increase scientific and technological research and development and technological upgrading efforts, eliminate obsolete processing equipment and technology , but also should constantly absorbing domestic and foreign advanced manufacturing technology, focusing on the development of the design and manufacture application of advanced technology and digital processing technology, the use of advanced technology to improve detection means from the source of quality engineering machinery , so that Chinese construction machinery design, manufacturing techniques to a new level. At present, China 's construction  steel crane  product quality still has much room for improvement , there are a lot of infrastructure work to be done. Only through deep plowing of existing products to improve overall product quality, reliability and technical upgrading efforts. The second is to use existing technology technological development , construction and development to adapt to the modernization of mining engineering machinery , control of cutting-edge technology , the leading technology such as micro- control technology, control technology , voice technology , light-control technology , radar control technology, electromagnetic technology , sensor technology and satellite remote sensing technology used in construction machinery , so that the Chinese construction machinery to get rid of silly , big , rough situation. Chinese manufacturing enterprises should be bold to unmanned remote control and direction of development, from a global perspective of the development of construction machinery construction machinery facie a competitive market , will be a high-tech fight, who occupied the commanding heights Who to become the king of the war . Therefore, construction machinery R & D and high-tech manufacturing enterprises should attach importance to the ownership of the new technologies, new products, patents lies in their own hands. Third, from the efficient, environmentally friendly , energy-saving point of view , focusing on product development efficiency and low consumption , energy conservation will be late to an important indicator of construction machinery , construction  bridge gantry crane  industry so participants should establish this concept, construction machinery located in the on the basis of efficiency and low consumption , will be a highlight of the development , will bring substantial benefits considerable growth point , the next leader of construction machinery products is bound to preclude the use of emerging new energy -powered devices. At the same time must also consider the process of construction machinery in operation on the environment and personnel safety hazards , focused on solving the noise, vibration and dust of the key technologies to improve the safety of the equipment , the environmental pollution and hazards reduced construction workers minimum , the product of "people -oriented " is also an important criterion for the user to select products .

Operating characteristics of electric hoist crane

First, work characteristics
More for vertical lifting and horizontal movement of lifting and transport operations.
Second, security features
While the majority of small and medium sized  hoist gantry crane  hoist lifting weight lifting equipment, special equipment, but still belongs to one of the safety of life, more dangerous equipment, the reliability and safety is particularly important in product design and manufacturing, installation erection, use and maintenance and safety oversight monitoring of the link must put safety and reliability in the first place.
Third, the operating characteristics
Hoist  steel crane  movements are one-dimensional motion, two-dimensional motion, three-dimensional movements and four-dimensional movements. Most of the three-dimensional movement, the left and right lateral movement in the X direction suspension load, longitudinal movement in the Y direction around the suspended load,overhead gantry crane vertically up and down along the Z-direction suspension load.

Tower crane which is the difference with other types of

Compared with other types of  overhead bridge crane  in construction are very different . The main differences are: tower crane has a high vertical tower , the upper part of the tower is mounted crane jib , jib crane slewing part can do together with a 360 ° rotation .

This unique structure of the crane generation , primarily to meet the needs of construction . As we all know , for the construction crane construction services , should have the greatest possible lifting height to accommodate various types of tall buildings construction needs . Secondly , I hope in the bottom of the crane boom , with a work space that can accommodate gradual build tall buildings , for high-rise buildings , the hope that the work space with high building construction increased in order to avoid the crane boom collide with the building elements and hinder construction . For this reason, in construction , tower cranes than truck cranes, crawler cranes applied more widely , as construction and installation engineering lifting a variety of building materials, components , equipment , tools, major construction machinery.

Any one tower cranes , regardless of their technical performance and structure , what is the difference , the total can be divided into three parts: the metal part of the working body part and the drive control system parts.

Tower crane metal structure parts are: the tower , the tower head or tower cap , lifting boom , boom equilibrium , slewing ring frame, chassis , trailer chassis and other major components account . For special tower  hoist gantry crane  , because the differences in structure , components also increase or decrease . A complete tower crane is a combination of these major components assembled together to form a whole. He was subjected to various workloads are functionally similar to the human skeleton.

Tower crane working body in order to achieve a variety of mechanical movement , to achieve the desired mechanical action and set up all the mechanical parts in general. For example, a performance of perfect self- climbing tower crane , often prepare the following working bodies : hoisting mechanism , luffing mechanism , slewing mechanism , traveling mechanism and lifting institutions. Some well as its variety of supportive institutions . Completion of the function of these institutions are: lifting mechanism to achieve goods rise and fall ; luffing mechanism to change the amplitude of the hook position ; slewing jib crane can do 360 reads rotation, changes in the level of work within the hook location, even in the stationary tower case can also hook the center tower crane slewing ring area as the center position in tune ; traveling mechanism so that the entire tower crane operation, change its operational sites ; top l institutions to make part of the tower  steel crane  slewing movements, thereby changing the working height of the tower crane .

Tower crane driving control system is another important component. Drives to provide power for a variety of organizations , the most commonly used for the YZR and YZ series AC motors. Control system and working mechanism drives the implementation of brake control , complete body starting, braking , speed control and redirect the work of the organization to achieve security monitoring, play a security role , and timely use of the work kinds of parameters displayed, let drivers know , be aware of when operating . Superior performance of a tower crane work , must be in good , safe, reliable, long-lived co-ordinated with the control system .

Development of tower cranes

Tower  bridge gantry crane   ( hereinafter referred to as tower crane ) with high efficiency , wide application , turning radius, since elevated high, easy to operate, resistance and easy installation and removal are more features, construction and installation works in our country has been widely use, and as a major construction machinery. In addition to tower cranes used in industrial and civil buildings , but in the power plant construction , water conservancy construction and shipbuilding sectors also often applied .
 
Always start with the basics of industrial and civil construction of a large number of remote layers of building materials to be transported from the ground to the top , the tower crane is complete vertical transport one of the most efficient lifting equipment . Since the tower crane boom mounted on the upper part of the tower , and higher buildings, so it can be installed near the building where it 's effective range is much greater than other hoist gantry crane s , lifting objects so as to direct lifting to the desired position has brought great convenience.

History of the development of tower cranes

In our country, the tower crane production and application of more than 30 years of history , has experienced a mapping from the design and manufacture of generic development process . In the 1950s, in order to meet the needs of economic construction , the introduction of the Soviet Union and the Eastern European countries tower sails. And for imitation . Imitation of the German Democratic Republic in 1954, the architect designed the tower crane type I and trial of China's first TQ2-5 type tower crane . Followed in order to meet power plant construction needs , has modeled on the Soviet -like sails, developed l 5t and 25t tower crane , the period of the production and use of tower cranes are small.
 
In the 1960s , China has entered a self- design and manufacturing stages of the tower crane . In 1961 , a successful trial of Red No. Ⅱ tower crane , which is China's first self-designed tower crane . It now appears that , although its performance is less than the current tower , but because of low cost, easy to use, until there is a certain market boast H . Subsequently, the country also is to design and manufacture TQ6 other tower in 1965 , the country has more than 10 manufacturers , producing tower  steel crane  over 360 units. This is the next time the Ministry of Walled tower crane rotating arm weapons , and can haul a whole , to meet the following six layers civil construction needs.
 
Since the 1970s , as construction needs, our tower crane into the technology improved varieties increased the new stage. 1972 for the construction of the Beijing Hotel , China is also the line design and manufacture of 1 60t · m 's just the type of self-elevating tower crane '1974 Yun Hotel Guangzhou from construction , but also to design and manufacture 40t · m of internal climbing tower from l machines, 1975 in order to meet the needs of infants and high-rise construction in Shanghai to design and manufacture zT-120 attached to the self- liter tower crane . These self-elevating , rotating on a horizontal jib tower crane trolley Empty parcels successful development ,sino hoist so that our tower crane production has entered a new phase. During this period , backspin tower crane new varieties QTl6, QT25, QT45 type. Some use a telescopic boom and folding tower structure, so that construction of the transport length shortened.

Construction machinery as strategic emerging industries need any breakthrough

  The State Council "on accelerating the cultivation and development of strategic emerging industries decision" that according to the characteristics of strategic emerging industries , based on China's national conditions and technology , industrial base , China has clearly there are seven major areas: energy saving, new generation of information technology, biology, high-end equipment manufacturing, new energy,bridge gantry crane new materials and new energy vehicles.
Strategic and emerging industries , refers to the major technological breakthroughs and significant development needs , based on the overall situation and long-term economic and social development have a significant lead role in promoting knowledge and technology -intensive, less consumption of material resources , growth potential, comprehensive benefits good industries.
According to the plan , by 2020 , strategic emerging industries accounted for the proportion of gross domestic product and strive to reach about 15%, from fiscal and financial aspects of a clear policy package to accelerate the introduction of cultivation and development of strategic new industries. Environmental protection, new generation of information technology, biotechnology , high-end equipment manufacturing industry has become a pillar industry of the national economy , new energy, new materials, new energy automotive industry has become a leading industry in the national economy .
Currently, the development of strategic emerging industry has become a hot topic of public attention . So, the construction machinery industry as a national strategic emerging industries What are the characteristics ? China's development of the actual situation of how what problems still exist obstacles to how to break ?
China's strategic emerging industry development as a whole is characterized by the development of faster , the overall proportion is very small, as of last year, the output value of strategic emerging industries to GDP ratio at about 4% . Currently, China's equipment manufacturing industry showed " big but not strong " development pattern , does not have the ability to lead the trend of world development , international markets have become increasingly grim situation facing the developed countries lead the front, developing countries are still playing catch-up phase.
It is understood that the United States in the year, the latest edition of the " National Innovation Strategy" made ​​to vigorously develop renewable energy , electric vehicles , biotechnology,hoist gantry crane space technology , nanotechnology and other six emerging industries, the European Union in 2009 introduced the " 2020 Wisdom sustainable inclusive growth strategy " , also clearly a similar new industry development plan . Japan, in its " 2020 Japan's new growth strategy towards the glorious ", also made ​​a similar development of key industries and technical objectives.
With the international and domestic situation changes , obviously, the development of strategic emerging industries facing great challenges. Construction machinery industry as a strategic emerging industries , in recent years, the rapid development of construction machinery industry has become more mature markets , business competition heating up, continue to promote the reform of the industry , but still faces several constraints point , need to break .
First, the lack of core technology to master , many of the core technologies dependent on foreign , which is currently China's construction machinery industry, especially high-end equipment manufacturing industry faces its biggest bottleneck. Must adhere to independent innovation, take the road to protect the development of national brand in competition with foreign brands break their own piece of heaven and earth . Secondly, the institutional mechanisms need to reform the current system is difficult to adapt to new industries. Explore new industrial development and promote high-end equipment manufacturing industry healthy and rapid development . In addition , the market is also impeded the development of strategic emerging industries a constraint points, which is a high-end manufacturing characteristics of the decision : First, high production costs , like the cost of solar power is a conventional thermal power 3-4 times ; two is the service facility requirements, such as new energy vehicles if there is no corresponding charging infrastructure , with the cars do not run up ; Third, market confidence bottleneck that made ​​something new out, consumers do not trust.
Recently introduced the " China construction machinery industry," second five "development plan " that promote the Chinese construction machinery industry from manufacturing power to create a power shift , the initial formation of a host of international advanced level products , basic technology, research and development and features manufacturing system .steel crane China Machinery Research Institute , former vice president Qu Xianming that China's equipment manufacturing industry should focus on industrial upgrading and the production-based to a service type , solid industrial base, solve the problem of slow development of infrastructure components , cultivate new industries , improve independent innovation capability. " From large to strong " is China's high-end equipment manufacturing industry development held by the philosophy, but only to play China's construction machinery industry cluster effect and brand effect , in order to embark on a unique path of internationalization .

Legend of the crane industry this year will be reborn

In 2012, the overall poor performance of the  hoist gantry crane  industry fundamentals, as the industry's strong cycle property, in the context of macroeconomic downside, weaker demand and overcapacity is the main reason for the weak performance of the industry. For the full year, revenue growth at a standstill, net income continues to decline. Share price performance, the industry index greater volatility in the first half, the second half showed unilateral downward trend appears near the end of a rally.

2013, the macroeconomic getting warmer, the estimated annual GDP growth of 8.3%. Overhead crane industry is expected in the fourth quarter of 2012 appeared to stabilize recovery features, the main sub-sectors or decreases in revenues and net income began to rise,sino hoist but the range is limited to improve the profitability of the industry as a whole is difficult to see significant improvement in the operating environment. Therefore, 2013 will be reflected in the machinery industry fundamentals low recovery.

Meanwhile, although the development of emerging industries is difficult to completely avoid the downside risks to the macroeconomic cycle, but the economic transformation of progressive long-term support for the emerging industry structure, macroeconomic moderate recovery in 2013, increasing frequency of new policies issued in the context of economic gradual transformation-related sectors will also be showing a good investment opportunity.

In the investment strategy, we recommend investors to grasp the industry low recovery and gradual transformation of the dual economic investment opportunities, promising to benefit from accelerated infrastructure investment, real estate investment recovery engineering overhead  steel crane   and railway equipment sector, the overall size of the industry still shrinking but in the short restart promote nuclear power equipment sector, as well as in the process of industrial upgrading has a prominent role in intelligent equipment industry.

Gantry crane industry in the next 20 years will continue to develop steadily

In the new stage of economic development,hoist gantry crane the Chinese economy as a whole, and Chinese enterprises are facing industrial upgrading, overcapacity two major challenges in the short term to prevent risks, improve anti-market shocks; medium term, through technology, products and business model innovation, reshaping the basis of the competitiveness of enterprises, by upgrading the access to new markets; on the institutional aspects, in order to strengthen the company's strategic and policy-making institution-building.
Chinese products of domestic enterprises with foreign brands products, product reliability, durability gap is narrowing, which is fortunate situation. Second half of 2011 to the end of 2012, this time the engineering  bridge gantry crane  industry gantry adjustment period is a good thing for the industry to adjust, so that the entire industry can be thinking seriously about how to face the adverse situation, how hard skills, positive development issue.
With the two sessions, the state policy of steady growth will gradually pulling, 2013 optimistic about the situation of the industry as a whole. Of course, the industry should return to the previous level in 2011 is still very difficult, the next 20 years, gantry crane industry will have good prospects, the industry will continue to develop steadily, ups and downs of the phenomenon will be rare.
China steel crane  industry has about highlights: First, from a global perspective, tamping the foundation, attack high, strong management. Second, national policy support, major key components imported duty-free, the key hydraulic components collaborative platform construction, business transformation projects progressing smoothly. Third, the rapid progress of the industry to the inventory. Fourth, the momentum of rapid productivity growth was suppressed, corporate expansion momentum slowed, industry rebound signal enhancement. Fifth, the international market is expected to grow.
High-end equipment manufacturing, to big to say, a symbol of a country's core competitiveness, involving the country's economic and national security; talked to the small, many industries and businesses related to the survival and development.