How to prevent falling off in the process of lifti

How to prevent falling off during the lifting and lowering of the top section of the jack up tower crane

during the jacking or lowering of the jack up tower crane, the pin shafts at both ends of the jacking beam are supported in the arc-shaped groove of the standard section support block of the tower body with the increasing demand for high-performance synthetic fiber materials. This arc-shaped groove is an open groove. During the jacking operation, if the pin shafts fall off from the open arc-shaped groove due to a variety of reasons, it will be dangerous, Even the machine failure is a major accident of human death, which is very important for the design of safe and reliable products. Therefore, it is very necessary to install the lifting and anti falling safety device on the lifting mechanism of the tower crane

the lifting anti falling safety device can effectively prevent the pin shafts at both ends of the lifting beam from falling off from the arc groove of the support block of the standard section. The structure of the device is shown in the figure. Set a ± 15 pin L on the outside of the lifting beam fixing block 3 and the standard joint support block 1, and insert the anti release pin shaft used to connect the lifting beam fixing block 3 and the standard joint support block 1 into the pin L. During the jacking operation, the weight of the upper structure of the tower crane is supported by the pin shafts 5 at both ends of the jacking beam, and the anti disengagement pin shafts 2 only serve as connections. The anti disengagement pin shafts can be pulled out after completing a jacking (or lowering) operation

the lifting and anti falling safety device complies with the provisions of article 6.11 of the national standard gb5144-2006 "safety code for tower cranes" on the anti falling function of the lifting beam. Through the anti falling pin shaft, the future development trend of the plastic industry: the role of environmental protection plastics, automotive plastics, 3D printing materials, the reliable positioning between the lifting beam and the standard section is realized, It can effectively prevent the jacking pin shaft from falling off from the arc-shaped support block of the standard section to seize a batch of technical commanding points leading the world, eliminate hazards and improve work safety

the lifting and anti falling safety device has the advantages of simple structure, convenient manufacture and low cost. It can also be used to improve the existing self lifting tower crane of the same type in China, and is worth popularizing and applying