Suspension bridge ultra-long main cable strand cable relaxing machine

Abstract

The invention relates to a construction machine in the prestressed field, in particular to a suspension bridge ultra-long main cable strand cable relaxing machine. The suspension bridge ultra-long main cable strand cable relaxing machine is composed of a base, a slewing bearing, a rotating body, a connecting base, a connecting rod, a cable bearing spool, a damping brake and an emergency braking brake which are connected into a whole, wherein the base is fixed on the ground, and inner ring of the slewing bearing is fixed on the base, the rotating body is fixed on an outer ring of the slewing bearing, the connecting base is fixed on the rotating body, the cable bearing spool is installed on the connecting base, and the connecting base and the cable bearing spool are connected and fixed through the connecting rod; and the damping brake and the emergency braking brake are installed on the base. The cable relaxing machine adopts a structure of horizontal cable relaxing, the structure is simplified through the slewing bearing cable of bearing axial force and radial force, the functions of the damping brake and the emergency braking brake are achieved at the same time, stable and rapid braking is achieved under the dual action of the damping brake and the emergency braking brake, and the construction efficiency is greatly improved. The suspension bridge ultra-long main cable strand cable relaxing machine is simple in the structure, easy to operate, and the manufacture and the installation cost are low.

Description

technical field [0001] The invention relates to construction machinery in the field of prestressing, in particular to a cable-laying machine for super-long main cable strands of a suspension bridge. Background technique [0002] The main load-bearing component of the suspension bridge is the suspension cable, which mainly bears the tensile force. Generally, more than ten steel materials with high tensile strength (steel wire, steel cable, etc.) are used to prefabricate parallel steel wire strands in the factory. The cable reel is transported to the construction site together, and then the cable is pulled by the tractor and erected (that is, the PPWS main cable frame method); as the span of suspension bridges in my country continues to refresh records, the main cable is getting longer and longer; If the speed is not uniform, the reverse pull effect of the rear cable strands is not ideal. When the traction process is temporarily stopped, especially the moment of inertia of the c...

AI Technical Summary

Problems solved by technology

[0004] Based on the above-mentioned patents, the ① and ④ types are insufficient for the braking force of the super-long cable, and there must be damping braking and emergency braking at the same time; The cable strands are affected by the self-gravity of the strands and loosen, causing the strands to be entangled or rubbed against the ground, which will damage the strands and seriously affect the efficiency and quality of the strands.

Both ② and ③ use bearings as the rotating mechanism, and torque motors, reducers, couplings, etc. as the braking mechanism. The structure, production, and operation are complicated, and the design and manufacturing costs are high. Especially for ultra-long strands, type selection is required Larger specifications of bearings, torque motors, reducers, couplings, etc., the entire equipment is relatively large and heavy, and the construction site needs to provide enough space

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