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Tower crane is a commonly used lifting equipment on construction sites. Used for lifting steel bars, wooden rods, concrete, steel pipes and other construction raw materials. With the extension of section by section (referred to as "standard section") (height). It is an essential equipment on the construction site.

The function of the blade tip is to bear the upper load from the boom pull rope and the balance arm pull rope, and directly transmit it to the tower structure through the structural components such as the swing tower, the turntable, and the bearing seat. Seen from the top of the tower, there are truncated cone column, forward or backward truncated cone column, herringbone frame and diagonal brace frame. All the upper Chinese tower cranes need to set a balance weight, which is used to support the balance weight to form the balance moment required by the design, and the balance moment is opposite to the lifting moment. In addition to the counterweight, its tail is often equipped with a lifting mechanism. The reason why the lifting mechanism and counterweight are placed together at the end of the balance arm is that it can play the role of a part of the counterweight, and the other is to increase the distance between the rope barrel and the spire guide wheel, which is convenient for the winding of the steel wire rope and avoids the phenomenon of disorderly rope. The consumption of weight is inversely proportional to the length of the balance arm, and there is a certain proportional relationship between the length of the balance arm and the length of the lifting arm. The balance weight is quite large. General light tower crane to at least 3~4t, heavy tower crane to nearly 30t.

Huaxia tower cranedevelopment process

1. do a needs analysis. According to the function, performance, working environment and other factors, work with customers to develop a detailed user requirements specification, and then determine the development goals.

2. preliminary scheme design. According to the needs analysis, develop programs, including setting functions and parameters, basic calculations, drawing a preliminary three-dimensional summary, etc. A preliminary review is then conducted with the client.

3. detailed scheme design. Listen to the opinions of the preliminary examination and implement the scheme design. The general diagram of the three-dimensional model is refined, the three-dimensional diagram of the part is drawn, and the finite element analysis and dynamic simulation of the structural components are carried out. Then a second review with the customer.

After 4., the scheme is determined and drawn. Listen to the opinions of the second instance and revise the scheme design. Drawing plans (such as part drawings, assembly drawings, general assembly drawings, painting drawings, etc.), And draw a list of parts and wearing parts.

5. production of all technical documentation, including promotional and technical samples, as well as product specifications.