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Fire and explosion protection structure installed on cable intermediate head, and use method thereof

A technology of cable intermediate joints and explosion-proof structures, which is applied in the direction of cable joints, equipment for connecting/terminating cables, etc., can solve the problems of poor durability and low manufacturing cost, and solve the problems of poor durability and low manufacturing cost , high-strength effect

Inactive Publication Date: 2016-10-26
九江电力勘察设计院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects of poor durability in the fireproof and explosion-proof protection measures of the cable intermediate joints in the existing power system, the present invention proposes a fireproof and explosion-proof structure installed at the cable intermediate joint and its use method, which aims at the main cause of the cable burning, Fundamentally, the flame retardant and explosion-proof treatment of the cable joints can maintain reliable fire-proof and explosion-proof properties after long-term operation, significantly reducing the safety hazards caused by cable burning, and the manufacturing cost is low, which is conducive to widespread promotion.

Method used

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  • Fire and explosion protection structure installed on cable intermediate head, and use method thereof
  • Fire and explosion protection structure installed on cable intermediate head, and use method thereof
  • Fire and explosion protection structure installed on cable intermediate head, and use method thereof

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Embodiment Construction

[0064] In order to facilitate the understanding of the technical content of the present invention, the technical solutions thereof will be further described below in conjunction with the accompanying drawings.

[0065] Such as figure 1 A fire-proof and explosion-proof structure installed at the middle joint of the cable is shown, including an outer box body 1 formed by fastening the upper half outer box 11 and the lower half outer box 12, and the assembly end connected to the left and right ports of the outer box body 1 The cover 2 and the primary sealing end cover 3 and inner sealing ring 4 arranged on the assembly end cover 2 .

[0066] Such as figure 1 , Figure 4 As shown, corresponding mold grooves are provided on the upper half outer box 11 and the lower half outer box 12, and axially extending flanges 10 are respectively arranged on both sides of the transverse ports of the mold grooves. The groove here is as Figure 4 The settings shown are semicircular. On the lo...

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Abstract

The invention discloses a fire and explosion protection structure installed on a cable intermediate head, and a use method thereof, and belongs to the technical field of the fire and explosion protection of a cable head. The fire and explosion protection structure comprises an outer box body, an assembling end cover, a disposable sealing end cover and an inner sealing ring, wherein the longitudinal assembling surface of the outer box body is provided with a double-channel sealing structure; the assembling end cover and the outer box body adopt an embedded sealing structure; the disposable sealing end cover and the inner sealing ring are arranged on the assembling end cover and are used for sealing a gap between a cable ring surface and the relevant cooperation surface of the assembling end cover; the outer box body is provided with a sealant injection pipe and a vent pipe; and the cable is completely covered with a cable fire protection wrapping tape after the cable is connected by the intermediate head, and is arranged in the outer box body, and fire protection sealant is injected into the outer box body through a sealant injection pipe. On an aspect of operation, firstly, carbon dioxide or nitrogen is used for discharging air in the outer box body, and then, the fire protection sealant is injected into the outer box body to carry out high-pressure sizing. The fire and explosion protection structure carries out pressure maintaining sizing on the fire protection sealant through the outer box body to realize the sealing protection of the cable head, a compact filling layer can be formed on the periphery of the intermediate head, the defect of poor fire protection performance durability and reliability is eliminated, and the fire and explosion protection structure is low in cost and is favorable for popularization.

Description

technical field [0001] The invention relates to the technical field of fire and explosion protection for cable intermediate joints in power systems, in particular to a fire and explosion-proof structure installed at the cable intermediate joint and a method for using the same. Background technique [0002] With the continuous improvement of the degree of cableization of urban power lines, the cable failure rate is also rising. Operating experience has proved that more than 80% of cable failures are related to cable accessories, and cable intermediate joint failures have the highest failure rate among cable accessories. Due to the flaws in the quality and installation process of the cable intermediate joint itself, once the cable intermediate joint explodes, it will often ignite the cable body and even damage the surrounding adjacent cables, causing huge losses to the power system. Therefore, the fire and explosion protection measures for the cable intermediate joint are The...

Claims

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Application Information

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IPC IPC(8): H02G15/10H02G1/14
CPCH02G1/14H02G15/10
Inventor 王光英
Owner 九江电力勘察设计院有限公司
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