Novel cable joint explosion-proof box

Abstract

The invention provides a novel cable joint explosion-proof box. The novel cable joint explosion-proof box comprises a shell, a ceramic polyolefin inner layer, a high-strength fiber layer, a pressure relief hole, a pressure relief cover plate, a fire extinguishing egg, a shell glue filling port and a shell fastening device; the shell is of an upper and lower double-petal combined structure, the twosides of the shell are in a contracted state, the upper and lower shells wrap and clamp a cable, shell fastening devices are arranged at the clamping positions of the two sides, a pressure relief hole and a shell glue filling port are formed in the shell, and a pressure relief cover plate is arranged below the pressure relief hole; the outer layer of the cable is sequentially wrapped with the high-strength ceramic polyolefin inner layer and the high-strength fiber layer. In the using process, when the internal pressure of the explosion-proof box is too high, internal gas is exhausted throughthe pressure relief holes, the explosion-proof box automatically relieves pressures, fire extinguishing eggs can be started instantly to extinguish fire, the temperature of a large amount of heat released by explosion is reduced in the fire extinguishing process, the purposes of fire extinguishing and cooling are achieved, and the functions of automatic pressure relief, explosion prevention, fireextinguishing and water prevention are achieved; and the loss and harm of accidents are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of power distribution protection, in particular to a novel cable joint explosion-proof box. Background technique [0002] When sparks are generated in the intermediate joints of high-voltage cables, if the product is not sealed as a whole and there is air flow in the shell, it will naturally cause an explosion and cause a major cable fire accident. At present, high-voltage cable joints are made of copper plates, which have no tensile and flexural resistance. Due to the bending effect, when a breakdown fault occurs in the copper shell, the thousands of degrees of arc will vaporize the insulating material, resulting in a huge instantaneous air pressure in the copper shell, causing the copper shell to explode, posing a serious threat to nearby cable lines and operation and maintenance personnel, especially Especially overhead and cable hybrid lines are generally equipped with reclosing switches, and reclosing w...

AI Technical Summary

Problems solved by technology

FRP may be blown and splashed, and the waterproof glue may also burn when the cable joint explodes

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