Air bag type protection box for cable joint

A technology of cable joints and protective boxes, which is applied in the direction of cable joints, etc., can solve the problems of cast iron protective box bursting, secondary injury accidents, high explosion impact strength, etc., to avoid personal property damage, avoid damage or decomposition, and maintain fire prevention The effect of tightness

Active Publication Date: 2013-09-18
3M CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional cable intermediate joint protection boxes are made of cast iron box body, stainless steel material or weak magnet plate material, etc., which may be poured with epoxy resin. Such products are relatively bulky and require a lot of manpower to install. The impact strength of the explosion is high, and the cast iron protective box will also be exploded, resulting in the risk of secondary injury accidents

Method used

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  • Air bag type protection box for cable joint
  • Air bag type protection box for cable joint
  • Air bag type protection box for cable joint

Examples

Experimental program
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Effect test

Embodiment 1

[0049] According to a preferred specific embodiment of the present invention, the box body 10 of an airbag type cable joint protection box made of commercially available 3MCS-195 and fireproof composite board has a thickness between 7mm and 8mm, and the box body The outer surface of 10 is provided with a steel plate veneer with a thickness of about 0.4mm to make the box body 10 strong enough. The inner volume of the box body 10 is about 20L, which is used as a 10KV medium voltage power cable. The opening 106 of the box body 10 is a rectangular hole with a size of 50×250mm. 3M Aluminum foil tape425 aluminum foil is used as the aluminum foil 30 to close the opening 106. The airbag 20 is made of PA66 (nylon 66) material, and the gas volume is about 50L. The air end is a rectangular opening of 50×250mm, and two circular pressure relief ports with a diameter of 40mm are provided on the airbag 20, and the airbag 20 is fixed on the box body 10 by using metal bead and bolts or rivets a...

Embodiment 2

[0051] According to another preferred specific embodiment of the present invention, the box body 10 of an airbag type cable joint protection box made of a fireproof composite board made of expanded graphite or vermiculite as the fireproof layer has an internal volume of about 20L and is used for 10KV medium voltage power cables. The box body 10 is provided with 10 circular openings 106 with a diameter of 10 mm, and the distance between adjacent openings 106 is 50 mm, such as figure 2 As shown, 10 openings 106 are arranged in 2 rows with 5 holes in each row. The airbag 20 adopts commercially available NOMEX fiber material, and its surface is treated with a commercially available 3MCIP600 liquid protective film for waterproofing. The gas volume of the airbag 20 is about 50L, and the air inlet end of the airbag 20 is a rectangular opening of 70×300mm. And the airbag 20 is provided with two circular pressure relief openings with a diameter of 40mm, and the airbag 20 is fixed on ...

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PUM

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Abstract

Disclosed is an air bag type protection box for a cable joint. The air bag type protection box comprises a box body with holes and an air bag covering the holes. Once a cable intermediate joint is short-circuited and explodes, instantaneously-produced flames and arcs can be restricted in the box body, and expansion pressure can enter the air bag from the box body to be released, accordingly, pressure in the protection box of the cable joint is reduced, the box body is prevented from being damaged or disintegrated, and the completeness and the fire-proof tightness of the box body are maintained.

Description

technical field [0001] The invention relates to cable equipment, in particular to an airbag type cable joint protection box. Background technique [0002] Short-circuit and explosion accidents in the middle joints of power cables usually easily lead to high-voltage arcs, cable fires, and mechanical shocks, and such mechanical shocks are likely to cause great harm to personal safety and property safety, and cause great risk of loss to surrounding cables. Therefore, for the cable intermediate joint protection device, the anti-explosion and fire performance are the most important. [0003] Traditional cable intermediate joint protection boxes are made of cast iron box body, stainless steel material or weak magnet plate material, etc., which may be poured with epoxy resin. Such products are relatively bulky and require a lot of manpower to install. The impact strength of the explosion is high, and the cast iron protective box will also be exploded, resulting in the risk of seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G15/10
Inventor 黄晖宇杨韬
Owner 3M CHINA
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