Moving arm tower crane installation method

Abstract

The invention provides a moving arm tower crane installation method which comprises the following steps of fixing an A-shaped frame and a cargo boom into a combined body; assembling a variable amplitude wire rope, a variable amplitude fixed pulley block and a variable amplitude movable pulley block on the combined body in advance according to a working state; hoisting the combined body onto an upper support and connecting a front strut of the A-shaped frame and a boom root of the cargo boom to the upper support in a pivotable manner; relieving connection between the A-shaped frame and the cargo boom; overturning the A-shaped frame into a normal installation state by utilizing a luffing mechanism; and installing the A-shaped frame. According to the invention, the variable amplitude pulley blocks and the variable amplitude wire rope can be installed on the ground; the A-shaped frame and the cargo boom are fixed into one whole body and then the whole body is hoisted onto the upper support; and after a hinge pin of the front strut of the A-shaped frame is inserted in place, the A-shaped frame is pulled to the installation position by a hoisting mechanism of a crane and pay-off and take-up of the luffing mechanism and the hinge pin is inserted in place. Compared with the prior art, the moving arm tower crane installation method and an auxiliary device thereof can greatly reduce the stringing work carried out by a worker aloft, and reduces working dangerousness of the worker.

Description

technical field [0001] The invention relates to the field of tower cranes, and more specifically, to a method for installing a boom tower crane. Background technique [0002] Please refer to Figure 1 to Figure 5 , the boom-type tower crane includes a tower body 20 and a slewing assembly 21, wherein a balance arm 13 is connected to the tail of the slewing assembly 21, and a luffing mechanism 7 and a hoisting mechanism 15 are installed on the balance arm 13. The jib 2 is also installed on the assembly 21, the luffing rod 9 is led out from the jib 2, and the luffing wire rope 3 is wound to the luffing fixed pulley block 4 at the top of the A-frame 1, and then connected to the luffing mechanism 7 . [0003] The prior art adopts the following installation steps: first, please refer to figure 1 , install the tower body 20 and the slewing assembly 21, and then install the balance arm 13, the hoisting mechanism 15 and the luffing mechanism 7 after completion. After completing t...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for installing a boom tower crane to solve the problems of high risk, large amount of operation, low efficiency and high cost in high-altitude operations in the prior art

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