Lifting mechanism for railway T-shaped girder bridge erecting machine

Abstract

The invention discloses a girder lifting trolley of a lifting mechanism for a railway T-shaped girder bridge erecting machine. The girder lifting trolley comprises at least one set of lifting winch system. According to the lifting mechanism for the railway T-shaped girder bridge erecting machine, a double-helix mechanical rope arrangement device is additionally arranged in a constrained space, so that the disorder of ropes in the winding of a plurality of layers of steel wire ropes on a winding drum body is avoided, and the service lives of the steel wire ropes are prolonged; final braking devices are additionally arranged in the constrained space to realize automatic braking when planetary gear winches overrun and prevent the slip of T-shaped girder pieces, so that the safety performance of the bridge erecting machine is improved; and moreover, a monitoring device is additionally arranged, each final braking device realizes braking when any winch stalls, a main hoist motor is powered off and braked, and a monitoring system displays the winch which stalls, so that failure judgment is facilitated, and overhauling time is shortened.

Description

technical field [0001] The invention relates to the technical field of hoisting mechanisms, in particular to a hoisting mechanism of a railway T-beam bridge erecting machine. Background technique [0002] At present, the single-arm railway T-beam bridge erecting machine used in the construction of new and old lines in my country with a speed of 200 kilometers per hour and below for passenger and freight co-line T-beams (Tongqiao 2201, 2101), and railway 32-meter and below concrete beams There are already more than 150 units, and, with the domestic demand to stimulate domestic demand and the further advancement of railway construction going abroad, the number of bridge erecting machines will also increase significantly. The erection of single- and double-line T-beams is a high-risk work, and safety issues have always been the focus of attention in the industry. [0003] The railway T-beam bridge erecting machine is currently the main construction machine for the construction ...

AI Technical Summary

Problems solved by technology

The erection of single- and double-line T-beams is a high-risk work, and safety issues have always been the focus of attention in the industry

[0006] ① During the construction of the existing railway T-beam bridge frame bridge, the lifting and hoisting system often has rope disorder, resulting in a very short service life of the steel wire rope, with an average life span of only 40 holes, resulting in frequent replacement of the steel wire rope, a large waste, and high costs , but there are also potential safety hazards that affect the construction progress

In addition, in order to reduce the replacement rate of steel wire ropes, some engineering construction units add rope-laying workers to the outside of the frame of the hoisting mechanism when there is no load, and perform manual rope-laying. This treatment method is dangerous and the treatment effect is not good; The pulling force of the steel wire rope is too large, it is difficult to manually arrange the rope

[0007] ②The hoisting system of the existing railway T-beam bridge erecting machine only has high-speed braking (brake at the motor end). The fault causes the high-speed shaft to break, and when the winch itself cannot brake, the girders will slide down, which may cause damage to the bridge pier and T-beam, or cause the machine to be destroyed, which poses a serious safety hazard

[0008] ③There is no monitoring device for the lifting hoisting system of the existing railway T-beam bridge erecting machine. Once there is a problem with the hoisting hoisting system, the operator cannot know the relevant situation, let alone control the stall state of the hoisting hoisting system

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