Flexible explosion-proof device for cable joints of 110 kv and above

By setting up two sets of interlocking explosion-proof joints, and using temperature-sensitive glass columns and spring structures to allow liquid to enter the filler layer and solidify the inorganic plugging material, combined with helium sealing, the problem of high explosion-proof cost of high-voltage cable joints is solved, and efficient explosion-proof and flame-retardant effects are achieved.

CN121906339BActive Publication Date: 2026-06-05SHANGHAI XINLING POWER TECH DEV CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI XINLING POWER TECH DEV CO LTD
Filing Date
2026-03-24
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing explosion-proof devices for 110 kV and above cable joints are costly to use and maintain, and are prone to explosion due to factors such as insulation aging and mechanical vibration, lacking effective explosion-proof measures.

Method used

It adopts a design with two sets of splicable explosion-proof joints, and utilizes temperature-sensitive glass columns, spring structure and inorganic plugging material. When the temperature-sensitive glass column breaks at high temperature, liquid enters the filler layer, causing the inorganic plugging material to solidify rapidly. Combined with helium sealing, it achieves a dual explosion-proof effect.

Benefits of technology

It achieves effective explosion protection and flame retardancy in the event of an explosion risk, reduces maintenance frequency and cost, improves protection reliability, and avoids power outages and equipment damage caused by explosions.

✦ Generated by Eureka AI based on patent content.

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    Figure CN121906339B_ABST
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Abstract

The application provides a 110-kilovolt and above cable joint flexible explosion-proof device, and belongs to the technical field of cable joint explosion-proof. The device comprises an explosion-proof joint, a cable main body and an explosion-proof cover. Two groups of splicable explosion-proof joints are arranged. When an explosion risk exists, the cable at the joint will be sharply heated due to high-voltage discharge. When the temperature rises to the melting temperature of the temperature-sensing glass column, the temperature-sensing glass column will be broken due to heat, and the bottom plug column is lifted by spring two. At this time, the liquid inlet groove is opened, so that the liquid outlet is communicated with the liquid storage tank, the internal gas pressure of the liquid storage tank is unbalanced, the sliding plug can push the liquid water in the liquid storage tank into the filler layer through the liquid outlet under the action of spring one, the inorganic blocking material in the filler layer is rapidly solidified with water, a dense structure is formed, and the explosion-proof and flame-retardant effects are achieved, so that the problems of high use cost and high maintenance cost of the existing explosion-proof joint are solved.
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