Electric cable connecting head fireproof protection box for non-humid environment

Abstract

An electric cable connecting head fireproof protection box for a non-humid environment is disclosed. The electric cable connecting head fireproof protection box is provided with a fireproof heat dissipation part which is normally switched on and a temperature sensor which is in communication with the fireproof heat dissipation part. When the temperature sensor detects that real time temperature inside the fireproof protection box does not exceed a preset alarm value, the fireproof heat dissipation part is controlled to be normally switched on; when the temperature sensor detects that the real time temperature inside the fireproof protection box exceeds the preset alarm value and a fire hazard occurs, the fireproof heat dissipation part is controlled to be switched off; when an electric cable connecting head explodes due to quick build-up of internal heat while the real time temperature inside the fireproof protection box does not exceed the preset temperature alarm value, the fireproof heat dissipation part which is normally switched on can provide an effective pressure release channel, and the the fireproof heat dissipation part is controlled to be switched off when the fire hazard occurs subsequently. The electric cable connecting head fireproof protection box can facilitate heat dissipation of the electric cable connecting head, and explosion accidents or fire hazard caused by heat build-up can be effectively reduced; once the fire hazards occur, fire tongues can be effectively blocked, and fire can be prevented from extending to other electric cables that are laid in the same tunnel.

Description

technical field [0001] The invention relates to a fire protection box for cable joints, in particular to a fire protection box for cable joints used in non-humid environments, which is suitable for fire protection in densely populated places such as cable tunnels, cable trenches, and cable interlayers. Background technique [0002] Cable fires mostly occur at cable joints. The cable intermediate joint is the weakest link in the safe operation of the power system. Cases of cable disconnection, short circuit, explosion and even major accidents caused by overheating of the cable joint are not uncommon. In the prior art, the high-voltage cable joints in some cable tunnels are arranged in closed protective boxes, and the interior of the protective boxes is filled with fireproof blocking materials. The heat dissipation of the cable joint is not good, and it is easy to generate heat accumulation. Once the joint explosion accident occurs, the energy has nowhere to be released, and ...

AI Technical Summary

Problems solved by technology

The heat dissipation of the cable joint is not good, and it is easy to generate heat accumulation. Once the joint explosion accident occurs, the energy has nowhere to be released, and the protection box will burst open instantly, causing a fire and burning adjacent cables, which is not conducive to the safe operation of the cable and leads to the power supply of the city. Large-scale network paralysis

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