In the global supply chain, China's manufacturing capacity cannot be ignored. What impact will the Chinese crane market and crane manufacturing field bring to the world?
A crane is a machine for carrying heavy objects, mainly for horizontal or vertical movement within a certain range. The role of this machine in construction is very obvious, but when it is used, the crane has a A very important feature of work is the need for intermittent movement, that is to say, all movements are performed alternately, which is widely used and easy to use.
With China's national modernization construction, the full application of new technologies and new processes, social productivity has jumped to a new level. Due to the needs of market competition, cranes are more and more widely used.
Judging from the growth rate of the hoisting machinery industry, China has achieved an increase in output value, an increase in export volume, and an increase in product output in the hoisting industry. Enterprises have also planned policies for this. The industry has gradually highlighted its advantages. China has become the world's largest crane market and the largest exporter of small-tonnage crane products, but in the super-large-tonnage crane models, the competitiveness of Chinese crane manufacturers is still insufficient, and the engine and hydraulic parts and electronic control systems are still The development of its industry is hindered, because large-tonnage products are technology-oriented, and small and medium-sized enterprises may lack technical precipitation and financial support
At present, there are more than 3,500 hoisting machinery and equipment manufacturers in China, of which 1,898 have installation and dismantling licenses, and they have relatively advanced manufacturing capabilities. and sales revenue, each with an annual increase of 30%, but there is still a big gap between the products and foreign countries.
With the expansion of the production scale and the improvement of the degree of automation, as an important equipment for material handling, the lifting device is more and more widely used in the modern production process, and its role is getting bigger and bigger, so the requirements for the lifting equipment are getting higher and higher. . Lifting equipment is undergoing a huge change. At present, hoisting machinery is in a period of rapid development in the market, and there is a huge market development potential. As the modernization construction process is getting faster and faster, the requirements for hoisting machinery are getting higher and higher, and hoisting machinery is developing towards large-scale, automated and specialized trends.
Due to the continuous expansion of industrial production scale, the increasing production efficiency, and the increasing proportion of material handling costs in the production process, the demand for large or high-speed cranes continues to increase, the lifting capacity is increasing, and the working speed is increasing. high, and put forward higher requirements for energy consumption and reliability. Cranes have become an important link in automated production processes. Cranes should not only be easy to operate and maintain, but also have good safety and reliability, and require excellent durability, trouble-free, maintainability and economical use. At present, the world's largest crawler crane has a lifting capacity of 3000t, the largest bridge crane has a lifting capacity of 1200t, the maximum running speed of the container quay-mounted loading and unloading bridge trolley has reached 350m/min, and the maximum running speed of the stacking crane is 240m/min. The lifting speed of the crane is 100m/min. The diversity of industrial production methods and user needs makes the market of special cranes continue to expand, and the varieties are constantly updated to meet special needs with unique functions and play the best role. For example, special cranes for metallurgy, nuclear power, papermaking, and garbage disposal, explosion-proof, anti-corrosion, insulating cranes and special cranes for railways, ships, and containers continue to increase their functions, improve their performance, and have stronger adaptability than ever before.
Modular design is used to replace the traditional whole machine design method, and the components, components and parts with basically the same functions on the crane are made into a variety of uses, with the same connection elements and interchangeable standard modules, through the mutual combination of different modules, Different types and specifications of cranes are formed. To improve the crane, it only needs to target a few modules. To design a new type of crane, you only need to choose different modules and recombine them. It can change the single-piece and small-batch production cranes into module production with considerable batches, and realize high-efficiency specialized production. The production organization of enterprises can also be changed from product management to module management. To improve the performance of the whole machine, reduce the manufacturing cost, increase the degree of generalization, and use a small number of parts and components to form a series of products with multiple varieties and specifications to fully meet the needs of users. At present, well-known crane companies in Germany, Britain, France, the United States and Japan have adopted the modular design of cranes and achieved significant benefits. After the standard crane series of the German company Demag adopts the modular design, the design cost of the single-piece design is reduced by 12%, the production cost is reduced by 45%, and the economic benefits are very considerable.
There are quite a lot of cranes used in general-purpose occasions, and the work is not very heavy. This type of crane has a large batch and a wide range of uses. Considering the comprehensive benefits, the crane is required to reduce the height of the shape as much as possible, simplify the structure, reduce the self-weight and wheel pressure, and can also name the entire building. Therefore, electric hoist bridge cranes and girder cranes will develop faster, and will mostly replace general-purpose bridge cranes of small and medium tonnage. After decades of development and innovation, Demag Germany has formed a series of light-duty combined standard cranes. The lifting capacity is 1~80 tons, and the working level is A1~A7. The whole series is composed of I-shaped and box-shaped single beams, suspended box-shaped single beams, angle trolley box-shaped single beams and box-shaped double beams. The main beam and the end beam are connected and the arrangement of the lifting trolley has various types, which can meet the requirements of different buildings and different lifting heights.
The renewal and development of cranes depends to a large extent on the improvement of electric drive and control. Combining mechanical technology and electronic technology, applying advanced computer technology, microelectronic technology, power electronic technology, optical cable technology, hydraulic technology, and fuzzy control technology to the mechanical drive and control system to realize the automation and intelligence of cranes. The new generation of electrical control devices for large and efficient cranes has been developed into a fully electronic digital control system. It is mainly composed of all-digital control drive device, programmable logic controller, fault diagnosis and data management system, digital manipulation given detection and other equipment. Variable voltage variable frequency speed regulation, radio frequency data communication, fault self-diagnosis monitoring, fuzzy control of spreader anti-sway, laser search for the center of gravity of the lifting object, near-field induction anti-collision technology, field bus, carrier communication and control, contactless power supply and three-dimensional bar code technology will be widely used. Make the crane more flexible, suitable for the flexible production mode of multiple batches and small batches, and improve the comprehensive automation level of a single machine. Focus on the development of high-performance electrical transmission devices with microprocessors as the core, so that the crane has excellent speed regulation and static and dynamic characteristics, automatic operation control, automatic display and recording, automatic protection and automatic detection of crane operation, special occasions remote control, etc., to meet the needs of automated production.
At present, the industry segment market has begun to emerge, and refinement is the key direction of the company's future development. Therefore, providing specialized products for customers in different fields to meet their special needs to the greatest extent has become the focus of the next development of most brand enterprises. Not only is the electric hoist bridge crane industry changing towards a customer-centric marketing concept, but the entire construction machinery industry is constantly improving its sales concept and changing its development model.
With the national power, petrochemical, steel, transportation and other infrastructure construction reaching a climax, China's domestic market for bridge cranes with electric hoists will expand rapidly. The trend of large-scale cranes has become an irreversible fact. In addition, crane enterprises can ensure the fulfillment of the contract, realize the delivery of products on schedule, establish maintenance outlets overseas, increase after-sales service for exported products, improve the recognition of overseas customers, and continuously improve the after-sales process by coordinating production and sales. , and use services to drive the increase of market share.
