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    当前位置:首页 > News > Trade news > Chinese tower crane models which encode meaning

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  • Chinese tower crane models which encode meaning

    时间:2015/7/4 17:46:55

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  • [Student question] China tower crane models coded meaning what?
     
    [Answer] tower crane, tower crane is short, since the image is very similar kind of machinery equipment tall tower, it is also known as the crane. Tower crane appeared in the early 20th century in Western Europe, according to records, in 1900: The first issue related to the construction of a tower machine patents. In 1905, there was a fixed mounted jib tower cranes, made in 1923, the prototype of modern tower crane, the same year appeared the first relatively complete in modern tower. In 1941, the German industrial standard DIN8770 announcement about the tower crane. The standard specifies in lifting load (t) and amplitude (m), product (tm) together to re-torque expressed tower crane lifting capacity.
     
    This standard, also became the model code base started in the 1950s, the Chinese tower crane industry. In general, the tower crane models currently used in China mainly in the following ten types of numbers:
    1, the rotary tower crane: QT; 2, on the back transferred from lifting tower cranes: QTZ; 3, under the rotary tower crane: QTX; 4, next time switched lifting tower crane: QTS; 5, Quick-mounted tower cranes: QTK; 6, fixed tower cranes: QTG; 7, climbing tower cranes: QTP; 8, tire tower cranes: QTL; 9, Truck tower crane: QTQ; 10 crawler tower cranes: QTU.
     
    And each tower crane according to its nominal lifting torque and arm length, weight lifting end Provision parameters used for identification. For example, QTZ40 (4908) shows "Nominal lifting moment is 400KN? M, 49 m boom, boom lifting at 49 meters (end lifting) weight on the back of switched 0,8T lifting tower crane" wherein 40 refers to the torque unit 40, a unit corresponding to 10KN? m, brackets 49 are arm length, "08" refers to 0.8 tons.
     
    At present, the domestic common tower crane models: QTZ31.5A (3808) - is now basically been eliminated, QTZ31.5B (4206), QTZ40 (4208/4708 / 4808x / 4810), QTZ50 (5008/5010), QTZ63 (5013/5610), QTZ80 (5513/5612), QTZ100 (5516/6010), QTZ125 (6018/6515). The tower crane more than the price a few 100 thousand to 10 million yuan, ranging from level. So many construction units selected crane rental business.
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