Main drive turn-over device and method for super-large-diameter shield tunneling machine

Abstract

The invention discloses a main drive turn-over device and method for a super-large-diameter shield tunneling machine. The main drive turn-over device comprises an arc-shaped turn-over base, and turn-over parts mounted at the two ends of the turn-over base. The main drive turn-over method comprises the following steps: the lower part of a shield body block serves as the turn-over base; an upward turning part is lifted; lifting lugs are connected for turning over; after a main drive rotates by 90 degrees, hook replacing operation is conducted; after hook replacing is successful, turning over continues; when the main drive rotates by 180 degrees, after a motor and a speed reducer are mounted, lifting hooks are connected, and two lifting parts reversely act till the main drive is located in the vertical position; and the main drive is lowered through hydraulic oil cylinders on the two sides. Previous overall lifting turning-over operation of the main drive is cleverly converted into rotation turning-over operation, when the main drive turns over through the mode, rotation lifting force provided by a crane only needs to overcome rolling friction resistance generated by the self-weight of the main drive, thus the lifting force of the crane can be decreased by about 10 times or above, and the purpose that large heavy objects are turned over by the small crane is achieved.

Description

technical field [0001] The invention belongs to the field of shield machine equipment, and in particular relates to a super-large-diameter shield machine main drive turnover device and method. Background technique [0002] In recent years, the market share of ultra-large diameter shield machines in the shield field has been increasing. Most of the new technologies and processes in the manufacturing process of ultra-large diameter shield machines can be called the key technologies that fill in the gaps and need to be solved urgently. These technologies can bring huge social and economic benefits. [0003] Generally speaking, after the assembly of the main drive of the ultra-large diameter shield machine, the weight is more than 250 tons and the diameter is more than 7m, which is an ultra-wide and overweight component. The traditional welded lifting lugs can no longer meet the turning and lifting work of the main drive assembly. [0004] At present, the commonly used metho...

AI Technical Summary

Problems solved by technology

[0005] Although this method can realize the hoisting and turning operation of the main drive of the ultra-large diameter shield machine, the hoisting structure is complicated

Not only did it not reduce the difficulty of the main drive hoisting and turning operation, but it increased the total weight of the lifting parts (increased the weight of the large turning lugs), which brought risks and difficulties to the lifting and turning operations

[0006] Moreover, the total weight of the main drive of the super-large-diameter shield machine exceeds the lifting capacity of the general factory, and an additional super-large-tonnage crawler crane (over 400 tons) needs to be rented.

This creates an expensive rental fee

Images