High-altitude mounting and dismounting method for heavy pin shaft

Abstract

The invention discloses a high-altitude mounting and dismounting method for a heavy pin shaft. The method comprises the steps that a transition plate and a shoulder pole beam are connected through a first pin shaft, and the shoulder pole beam is connected to a gantry crane; a first chain block is fixed to the first pin shaft; the gantry crane is moved, and a pin hole in the other end of the transition plate is aligned with the position of a pin hole of a lifting lug plate; two stand bar ends of a first support are fixed to the transition plate, and the first support further comprises a connecting part connecting two supports; one end of a second chain block is fixed to the connecting part of the first support; the first chain block is fixed to one end of the heavy pin shaft, the second chain block penetrates the pin hole of the lifting lug plate and the pin hole of the transition plate, then the second chain block is fixed to the other end of the heavy pin shaft, the second chain block applies pull force on the heavy pin shaft, then the heavy pin shaft can be fixed in the pin hole of the lifting lug plate and the pin hole of the transition plate, and high-altitude installing of the heavy pin shaft is achieved.

Description

technical field [0001] The invention relates to the technical field of installation and disassembly, in particular to a high-altitude loading and unloading method for heavy-duty pin shafts. Background technique [0002] Due to the environmental constraints of the on-site hoisting conditions, the "dolphin"-shaped 138# steel cable tower of the Hong Kong-Zhuhai-Macao Bridge's river-sea direct ship channel bridge needs to be turned over by 180°, and the auxiliary tower is transported and hoisted on the lower main tower. The steel tower weighs 2,600 tons, the slings are 600 tons, and the total weight is 3,200 tons. There are four lifting points for lifting and turning over, and the average weight of each lifting point is 800 tons. It is very difficult to lift and turn over such a heavy component . [0003] Before turning over 180°, the steel cable tower needs to be hoisted from the transport ship to the turning site, and a pole beam is used for hoisting. The pole beam is connec...

AI Technical Summary

Problems solved by technology

[0004] This application provides a high-altitude loading and unloading method for heavy-duty pins, which solves the technical problem of difficult installation or disassembly of heavy-duty pins in high-altitude operations in the prior art

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