1 thought on “my country’s development of the tower crane”

  1. In the early 1950s, my country’s tower machines started from imitation. In 1954, the Type Ⅰ pagoda machine was imitated by East German architects; in the 1960s, it designed and manufactured several models of 25TM, 40TM, and 60TM. With the increase of high -rise buildings, new requirements have been put forward on construction machinery, so the 160TM adhesion, 45TM internal climbing, and 120TM self -promotion and other pagodas have been launched; since the 1980s, my country’s tower machine industry has obtained the pagoda industry. Fast development, especially in recent years, the sales of tower machines have continued to rise. In 2001, the industry statistics were 9,738 units. In 2002, it became the world’s first country with an annual output of 10,000 units. In 2004, due to the adjustment of the macro -control and the structural adjustment of the crane industry, the production and sales of the tower machine fell. In 2005 and 2006, under the strong economic growth of the economic high -speed growth, the production and sales of my country’s tower machines resumed rapid growth. More than 20,000 units.
    The production and application of the Chinese tower crane has a history of more than 40 years. It has gone through a process of using surveying and mapping to self -design and manufacturing.
    The 1950s, in order to meet the needs of national economic construction, China introduced tower cranes in the former Soviet Union and some countries in Eastern Europe and imitated it. In 1954, the prototype of democratic Germany designed, successfully made the first TQ2-6 tower crane in Fushun. Later, the former Soviet Sample machine was imitated to develop 15T and 25T tower cranes. During this period, the number of tower -type cranes produced and used in China was small.
    The 1960s, due to the development of high -rise and ultra -high -rise buildings, internal climbing and external attachment tower cranes were widely used, and relatively advanced technologies were adopted in the work institution, such as DC motor speed regulation, which can be available, can be available, which can Speed ​​regulation, vortex brake, install liquid puppets in rotation and operating mechanisms. During this period, China began to enter the stage of self -design and manufacturing tower crane. In 1961, the Red Flag-11 Tower crane was first tried in Beijing. It was also the earliest tower crane designed by China. Subsequently, China designed and manufactured the TQ-6 tower crane. By 1965, there were more than 10 production plants and more than 360 production tower cranes. These tower cranes are all downward arm types, which can be delayed as a whole, which can meet the needs of civil buildings below six floors.
    The 1970s, tower crane services were more widely used. The amplitude, rising weight and upper height of the tower crane have significantly increased. In order to meet all aspects of the market, tower cranes developed in one direction in one machine. The Chinese tower crane has entered a new stage of improvement of technology and increased varieties. In 1972, the first light tire-type orbit two-purpose cranes in China came out: In the same year, for the construction of the Beijing Hotel, China also designed and manufactured the QT-10 self-lift tower crane. M. During this period, a small car of ZT 100, ZT 120, ZT 280 and other small car-amplitude self-lift tower cranes, QT-20 cars change the internal climbing tower crane, QTL 16, TQ 40, TQ 45, TD 25 , QTG 40, QTG 60 Turn around the arm to set up a fast -loading tower crane, etc., its annual output is up to 900 units, marking the Chinese tower crane industry into a new stage.
    The 1980s, many new products appeared in the Chinese tower crane, mainly including QTZ 100, QZT 120 and other self -lift tower cranes, QT 60, QTK 60, QT 25HK, etc. Cranes and so on. These products are close to the level of the 1970s in terms of performance, and the maximum annual output of this period has reached 1,400 units. At the same time, with the number of reform and opening up and international technological exchanges, in order to meet the needs of construction construction, some tower cranes have also been introduced from abroad. product. Due to the good quality of these tower cranes and advanced technical performance, it has greatly promoted the design and manufacturing technology of China’s tower crane products.
    The 1990s, the Chinese tower crane industry has entered a new period of prosperity with the increase of construction tasks nationwide, and the annual output has increased for many years, and some products have been exported abroad. The total ownership of the nationwide tower crane also from dozens of units in the 1950s as of 2000 as of 2000. There are more than 300 manufacturers in the country, and there are 241 production licenses; about 9,000 units: an annual output: more than ten companies with an output value of over 100 million yuan and a profit and tax of more than 10 million. Since 1992, the annual export volume of tower machines has been greater than the import volume, and the annual export value has been greater than the import amount. So far, the annual trade surplus has reached more than 8 million US dollars. Create foreign exchange. At this point, China can be regarded as a tower crane large country from the perspective of production scale, application scope and tower cranes. However, since my country joined the WTO, the current situation of the production of my country’s tower machines calmly analyzes the current situation of the production of tower machines. There are the following problems:
    The product structure is unreasonable. The product model classification standards formulated by China will start speed, turn speed, amplitude speed, walking speed, top speed, upper weight, rising weight torque and other main parameters. The geometric size has been strictly strictly regulated, which seriously limits the technological progress of the tower machine. The unstable user base has also restricted technological progress. In China, a large number of small and medium -sized construction enterprises have not funds and lack of long -term planning. They use second -hand goods eliminated by large enterprises and old tower machines that are in service. Therefore, the convenient transportation of transportation in developed countries, rapidly setting up and safe use of fast -use settings tower machines have been left out in my country. At the same time, insufficient corporate innovation capabilities have also affected product development. Many newly -built enterprises have weak research and development capabilities. Most products are jointly developed with colleges and scientific research units. Production does not form a company’s own characteristics.
    The manufacturing technology is not adapted to the formation of scale
    In the past 20 years, although the level of my country’s tower machine manufacturing industry has improved, the advanced manufacturing technology of other industries is still backward. The gap between mechanical backbone companies is also very different. Many manufacturers have the bottom of production efficiency, environmental pollution, and difficulty in welding quality and the appearance quality of the finished product. Only a few enterprises can do the basis of the front base. The management model and production method of most enterprises are traditional multi -level progressive static and constant models. The fierce competition of mass production and commodity economy is difficult to form its own national scale industry.
    Because industry statistics only count the sales of 20 or 30 production companies, the sales volume of the entire industry must far exceed statistics. Do not doubt that my country has become a major producer of the world’s civilian tower machine, and it is also one of the main demand markets in the world’s tower machines. According to preliminary statistics, there are more than 400 tower production plants that have obtained production licenses in my country, and less than 100 in the 1980s.

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