Anti-seismic Ladder Cable Tray for Nuclear Island in Nuclear Power Plant

Abstract

The invention provides an anti-seismic ladder type cable bridge frame for a nuclear island in a nuclear power plant, which includes two side frames and a plurality of ladder plates installed on the side frames for supporting cables; the ladder plates are cut from C-shaped steel, and the ladder plates are Install the pressing piece, which presses the cable on the ladder. The pressing piece includes a pressing plate, a locking bolt and a top piece. The two pressing legs of the pressing plate are set on the front and rear sides of the cable, and the two top pieces are connected At the bottom of the two pressing legs, the top sheet extends into the steel groove of the step plate. The top sheet includes a horizontally arranged force-applying top surface and an arc-shaped side wall that converges inward. The force-applying top surface is located below the top flange of the step plate. And the left and right sides of the force-applied top surface can withstand the two top flangings respectively; the locking bolt is installed on the cross bar on the top of the pressure plate, and the cable can be compressed by turning the locking bolt downward. The invention solves the problems of long installation time, low construction efficiency and hidden danger of connection loosening after long-term use of the ladder type bridge frame.

Description

technical field [0001] The invention belongs to the technical field of cable bridges, and in particular relates to an anti-seismic ladder type cable bridge for nuclear islands in nuclear power plants. Background technique [0002] The ladder cable tray is widely used in the cable erection project of the nuclear island of the nuclear power plant. The ladder cable tray includes a tray and a ladder frame. The ladder frame can be in a straight section or a curved section. After the cable is laid on the ladder frame, it is fixed by fasteners. Pallet-supported ladder frames mounted on buildings form a rigid structural system with close-fitting support cables. [0003] Most cable trays use clamps to fix the cables, and bolts are used to lock the front and rear ends of the clamps to the ladder plates respectively. Due to the large number of ladder plates in the bridge frame, the installation of the clamps takes a long time and the construction efficiency is low. Due to the use of bo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an anti-seismic ladder type cable bridge for nuclear islands in nuclear power plants to solve the problems of long installation hours, low construction efficiency, and high potential for loose connections after long-term use.

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