2010~2014 is the fastest growing three years in China's tower crane manufacturing industry. In the three years, tower crane manufacturing enterprises surged from more than 280 to nearly 600. This is mainly due to the 4 trillion and 800 billion investment effect. By 2013, with the recession of the 4 trillion and 800 billion investment effect, the growth of tower crane manufacturing industry has been seriously declining. The sustained slowdown in China's economic growth in the next 5 years has become an indisputable fact. This is a rare opportunity for the country to "adjust the industrial structure and transform the way of development". The same tower manufacturing industry is also facing adjustment. The adjustment of the tower crane manufacturing industry will present three kinds of situation: one is that the industry will accelerate the shuffling and the inferior, the two is that the production and manufacturing modernization level of the industry will be improved, thus the production efficiency and the quality of the products will be improved; and three, the concentration of the industry will be continuously improved, that is, the emergence of some large-scale production and manufacturing enterprises.
One, the industry will accelerate the shuffle
In 2010 ~2014, tower crane manufacturing enterprises increased from more than 280 to nearly 600, this is the effect of economic stimulation, on the other hand, the threshold of the tower machine manufacturing is low. As the country's economic growth slows, market demand will shrink considerably compared with 2012~2013. At the same time, users' awareness of tower crane product quality has been continuously improved. Some enterprises with small scale, poor product quality and poor performance will be eliminated. On the other hand, Xugong Group, Sany, China construction machine and other large enterprises have also entered the tower machine manufacturing industry, which is also an important factor to accelerate the shuffling of the tower machine manufacturing industry.
Two, the level of manufacturing modernization will continue to increase.
The tower crane is a non compact type of equipment, and the proportion of the structure parts is larger in the product, but the machining precision of these structural parts is required and the precision of the parts is equal. Therefore, the rationality of the manufacturing process and the modernization level of the production process equipment have a great relationship with the production efficiency, the quality of the products and the cost of production. The rationality of the manufacturing process is the rationality of the whole process from raw material treatment, welding, machining to coating, which is direct to the effect of production efficiency. The two is the modernization of process equipment, which has a direct impact on product quality. At the same time, the improvement of the modernization level of technological equipment can minimize the dependence on labor and reduce labor costs. However, the modernization of the manufacturing process of tower crane is not only to increase several welding manipulator, but to modernize the whole process. First of all, we need to have a correct understanding of the concept. At present, there are only a few construction elevator manufacturers in China, basically realizing the modern manufacturing process and process equipment. This is also the direction that the tower crane manufacturing industry needs to strive for and the future development trend.
Three, the concentration of the industry will continue to increase
In 2010, the concentration degree of the tower crane manufacturing industry was counted by the relevant agencies. The concentration of the industry was 28%, far below the 99.5% of the car crane, the crawler crane 99%, the loader 99%, and the other engineering machinery, such as the concrete pump, and other engineering machinery. The level of concentration of the industry reflects the degree of standardization of an industry, as well as the "cost-effective transparency" of products. In recent years, the concentration degree of tower crane manufacturing industry has improved, such as ZOOMLION's output value is as high as about 8000000000 yuan, and its market share is more than 30% of the exclusive industry. But the development of the whole industry is still very uneven, especially the industry concentration and product price performance transparency level is still relatively low. Mainly reflected in the product configuration, performance, quality and so on, the gap is large, but the price gap is not large.
The next 5 years or so, through the industry to accelerate the shuffling, the survival of the superior, and the continuous improvement of the production and manufacturing of the level of modernization, industry concentration will continue to improve.
The future development trend of tower crane
It has been nearly 30 years since the introduction of foreign tower crane technology in 80s of last century. Over the past 30 years, the development of China's tower crane has made great progress, but the technical level of tower crane has not been improved greatly. With the development of science and the progress of the times, tower crane products will also be improved.
There are three trends in the change of the tower crane products in the future: first, the flat head of the medium tower (63t.m~500t.m), the large tower crane (600t.m), and the two is the improvement of the technical performance of the three major mechanisms of the tower, especially the performance of the lifting mechanism; three is the continuous application of digital technology in the tower control system. Universal。
Medium tower crane flat head and large tower mobile arm trend
(1) the advantage of the medium tower craning. The advantages of flat tower cranes are reflected in two aspects: making and using.
A. production and manufacturing advantages. The manufacturing of the flat head tower can achieve a greater degree of modular production, which can promote the modernization of the technology equipment and means of production, and the modernization of the process equipment and production means can improve the production efficiency, improve the manufacturing precision and reduce the production cost.
B. uses advantages. The first is the modular structure of the flat head tower. When it is installed and dismantled, the tonnage of the lifting equipment can be reduced to the maximum. Compared with the hammer head tower, the installation and dismantling is more safe. Two, the scale and the volume of the project are getting bigger and bigger in the future. The density of the operation of the tower is getting bigger and bigger. The interference of the flat head tower crane operation is better than the hammer head type tower.
In addition to the above advantages, the force direction of the upper and lower chords of the lifting arm is the same at the different operating radius, and the arm of the hammer head tower is a statically indeterminate structure. Because of the action of the rod, the force of the upper and lower chords of the crane is changed when the crane is in different working radius. This is also a great advantage of the flat head tower. It should be said that the flat head of medium tower crane is an inevitable trend of technological progress and progress of the times.
