Turning rack and method of truss bridge chord piece

Abstract

The invention discloses a turning rack and method of a truss bridge chord piece. The turning rack comprises at least two L-shaped rack body assemblies and at least two connecting rods, and the two ends of the connecting rods are connected with the two L-shaped rack body assemblies correspondingly. Each L-shaped rack body assembly comprises a first turning arm and a second turning arm, wherein thefirst end of the first turning arm and the first end of the second turning arm are vertically connected, the second end of the first turning arm and the second end of the second turning arm are provided with suspension lugs, and the junction of the first turning arm and the second turning arm is rotationally fixed to a foundation. According to the turning rack and method of the truss bridge chordpiece, the vertexes of the L-shaped rack body assemblies are rotationally fixed to the foundation, the lengths of every two arms of the L-shaped turning rack are determined on the premise that the weight of rods is matched with the hoisting capacity of a lifting crane according to the lever principle, and particularly aiming at the situation that the capacity of the lifting crane is smaller than the weight of the rods, no turning suspension lug needs to be installed on the rods of the truss bridge chord piece and base materials cannot be damaged.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a turning frame for a truss bridge string and a turning method thereof. Background technique [0002] The chords of truss bridges are generally composed of upper and lower main chords, web members and other chords. The number and length of the chords are various, and the chords are frequently turned over in order to meet the needs of the welding station during the manufacturing process. [0003] In the prior art, the truss bridge chords are usually turned over by means of steel wires and hooks, and the truss bridge chords are turned over. Since it is necessary to install turning lugs on the rods of the truss bridge chords, it is easy to cause damage to the base material of the rods when installing or removing the lifting lugs. Contents of the invention [0004] This application provides a turn-over frame for truss bridge chords and a turn-over method thereof, whic...

AI Technical Summary

Problems solved by technology

[0004] This application provides a turn-over frame for truss bridge chords and a turn-over method thereof, which solves the need to install turn-over lifting lugs on the rods of truss bridge chords in the prior art, which makes it easy to give the rods when installing or removing the lifting lugs. The technical problem of the damage caused by the parent material

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