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High voltage electric cable connecting head fireproof protection method

A high-voltage cable and cable technology, applied in the direction of cable joints, etc., can solve the problems of unfavorable cable operation safety, heat accumulation, unfavorable cable joint heat dissipation, etc.

Inactive Publication Date: 2016-11-16
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the closed protective box and the closed fireproof board are not conducive to the heat dissipation of the cable joints, which is easy to generate heat accumulation, which is not conducive to the safe operation of the cables.

Method used

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  • High voltage electric cable connecting head fireproof protection method
  • High voltage electric cable connecting head fireproof protection method
  • High voltage electric cable connecting head fireproof protection method

Examples

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Embodiment Construction

[0024] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0025] A fire protection method for a high-voltage cable joint, used for a fire protection box 10 for a high-voltage cable joint, such as figure 1 , and combined with Figure 2 to Figure 5 As shown, the high-voltage cable joint fire protection box 10 includes: an upper half box 100 and a lower half box 200, the structure of the upper half box 100 and the lower half box 200 is basically the same, and the upper half box 100 and the lower half box 200 are spliced ​​together to form a space for accommodating high-voltage cable joints 300, which are assembled in a manner that is easy to disassemble and connect, which facilitates the installation and maintenance of high-voltage cable joints 300. Both ends of the high-voltage cable joints 300 are connected to power cables 400 and fire protection boxes 10 The two ends o...

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Abstract

The invention discloses a high voltage electric cable connecting head fireproof protection method which comprises the following steps: an explosion-proof temperature and humidity sensor detects temperature and humidity in a fireproof protection box; an explosion-proof pressure sensor detects air pressure in the fireproof protection box and generates control signals according to the temperature and humidity, unit time temperature difference and temperature difference change, air pressure values in the fireproof protection box; a first driving mechanism and a second driving mechanism respectively drive a first rotating louvre and a second rotating louvre to rotate from a first state to a second state or rotate from the second state to the first state according to the control signals, the first state is a closed state and the second state is an open state. The high voltage electric cable connecting head fireproof protection method is applicable to humid environment, requirements for heat dissipation of an electric cable connecting head can be met, and energy can be released when the electric cable connecting head explodes; when a fire hazard or an explosion occurs in one path of an electric power cable, fire can be prevented from extending to other electric cables laid in the same tunnel.

Description

technical field [0001] The invention relates to the technical field of fire protection for cable joints, in particular to a fire protection method for high-voltage cable joints, which is suitable for fire protection in places where high-voltage power cables are densely populated, 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 a cable tunnel, the 110kV cable joints are installed in a closed protective box, which is filled with fire-proof blocking material. The heat dissipation of the cable joints is unfavorable. When a joint explosion accident occurs, the energy has no place to release. The adjacent cables caused the city's power supply network to be paralyzed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G15/10
CPCH02G15/10
Inventor 李双凤
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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