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

CN106058788AInactive Publication Date: 2016-10-26九江电力勘察设计院有限公司 +1

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: 九江电力勘察设计院有限公司
Publication Date: 2016-10-26
Estimated Expiration: Not applicable · inactive patent

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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.

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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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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