Anti-seismic ladder-type cable bridge for nuclear island of nuclear power station

Abstract

The invention provides an anti-seismic ladder-type cable bridge for a nuclear island of a nuclear power station. The anti-seismic ladder-type cable bridge comprises two side frames and a plurality ofladder plates which are arranged on the side frames and are used for supporting a cable, wherein each ladder plate is formed by cutting C-shaped steel, a pressing piece is installed on each ladder plate, the cable is pressed on each ladder plate through the pressing piece, each pressing piece comprises a pressing plate, a locking bolt and an ejecting piece, two pressing legs of each pressing plateare erected on the front side and the rear side of the cable, the two ejecting pieces are connected to the bottoms of the two pressing legs respectively, and the ejecting pieces stretch into a steelgroove of each ladder plate. Each ejecting piece comprises a horizontally-arranged force application ejecting face and an arc-shaped side wall converging towards the inner side. The force applicationejecting face is located below top turnups of each ladder plate, and the left side and the right side of the force application ejecting face can abut against the two top turnups respectively. The locking bolts are installed on transverse ribs on the top of the pressing plates, and the cable can be pressed by screwing the locking bolts downwards. According to the cable bridge, the problems of longmounting time, low construction efficiency and hidden danger of connection looseness after long-term use of the ladder type bridge frame are solved.

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.

Images