Heat-shrinkable composite stress pipe and production method thereof

A composite stress and stress tube technology, applied in applications, tubular items, other household appliances, etc., can solve the problems of cable breathing, poor product weather resistance, short product storage time, etc., and achieve good partial discharge and strong weather resistance.

Active Publication Date: 2015-09-02
深圳市沃尔电力技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, at present, both methods have their own advantages and disadvantages: the stress tube produced by the heat shrinkage parameter stress control method has strong weather resistance, puncture resistance, long-term storage, and relatively economical price, but it is easy to produce a gap between the cable and the cable after installation, and the partial discharge is relatively large. It cannot meet the requirements of cable accessories above 26/35kV, and it cannot breathe with the cable during long-ter

Method used

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  • Heat-shrinkable composite stress pipe and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0054] Example 1

[0055] Heat-shrinkable composite stress tubes are produced by using the heat-shrinkable tube preparation materials and cold-shrinkable stress tube preparation materials of the following components according to the production method of the above-mentioned heat-shrinkable composite stress tube.

[0056] Heat-shrinkable stress tube preparation materials: 100 parts of EVA, 10 parts of modifier thermoplastic elastomer, 1.5 parts of antioxidant, 25 parts of barium titanate, 15 parts of conductive carbon black, 3 parts of lubricant stearic acid, and cross-linking auxiliary agent 3 0.8 parts of trimethylolpropane methacrylate, 4 parts of interface compatibilizer

[0057] Cold shrinkable stress tube preparation materials: 100 parts of EPDM, 2 parts of zinc oxide, 1.2 parts of stearic acid, 1.6 parts of antioxidant, 35 parts of carbon black SP5000 reinforcing agent, 50 parts of stress control agent barium titanate, 1 part of dicumyl peroxide as a vulcanizing agent,...

Example Embodiment

[0058] Example 2

[0059] Heat-shrinkable composite stress tubes are produced by using the heat-shrinkable tube preparation materials and cold-shrinkable stress tube preparation materials of the following components according to the production method of the above-mentioned heat-shrinkable composite stress tube.

[0060] Heat-shrinkable stress tube preparation materials: 50 parts of ethylene-vinyl acetate copolymer EVA, 50 parts of low-density polyethylene LDPE, 18 parts of modifier thermoplastic elastomer, 2.2 parts of antioxidant, 30 parts of barium titanate, 25 parts of conductive carbon black, 3.4 parts of lubricant zinc stearate, 1.4 parts of trimethylolpropane trimethacrylate, 6 parts of interfacial compatibilizer

[0061] Cold shrinkable stress tube preparation materials: 100 parts of EPDM, 5 parts of zinc oxide, 1.1 parts of stearic acid, 2.2 parts of antioxidant, 40 parts of carbon black N550 reinforcing agent, 34 parts of barium titanate, 38 parts of conductive carb...

Example Embodiment

[0062] Example 3

[0063] Heat-shrinkable composite stress tubes are produced by using the heat-shrinkable tube preparation materials and cold-shrinkable stress tube preparation materials of the following components according to the production method of the above-mentioned heat-shrinkable composite stress tube.

[0064] Heat-shrinkable stress tube preparation materials: 80 parts of ethylene-vinyl acetate copolymer EVA, 20 parts of low-density polyethylene LDPE, 25 parts of modifier thermoplastic elastomer, 1.8 parts of antioxidant, 10 parts of barium titanate, 35 parts of conductive carbon black, 30 parts of titanium dioxide, 3.8 parts of zinc stearate as a lubricant, 1.6 parts of divinyltoluene as a crosslinking aid, and 8 parts of an interfacial compatibilizer.

[0065] Cold shrink stress tube preparation materials: 100 parts of EPDM, 2 parts of zinc oxide, 1.2 parts of stearic acid, 2.8 parts of anti-aging agent, 60 parts of too good N660 reinforcing agent, 18 parts of ba...

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Abstract

The invention discloses a heat-shrinkable composite stress pipe comprising an outer heat-shrinkable stress pipe and an inner cold-shrinkable stress pipe which are composited together. The preparation material of the heat-shrinkable stress pipe comprises 100 parts of ethylene and copolymer thereof, 10 to 35 parts of modifier, 0.3 to 6 parts of anti-oxidant, 5 to 100 parts of reinforcing agent, 3 to 12 parts of interface compatilizer and the like. The preparation material of the cold-shrinkable stress pipe comprises 100 parts of ethylene propylene diene monomer EPDM, 2 to 10 parts of zinc oxide, 5 to 15 parts of interface compatilizer and the like. The heat-shrinkable composite stress pipe is good in weatherability and resistant to piercing, can be stored for a long time, has good elasticity and tight joint to a cable interface without gaps after being installed, is good in partial discharge, breathe with a cable and generates no gap after being used for a long time, and may safely operate for a long time.

Description

technical field [0001] The invention relates to a composite heat-shrinkable stress control pipe, in particular to a middle-high pressure heat-shrinkable composite stress control pipe. Background technique [0002] The main functions of cable accessories include electrical stress control, insulation recovery, sealing and waterproofing. In order to ensure the safe operation of cables during use, the electrical stress control in cable accessories is the most important, especially for high-voltage cable accessories. [0003] At present, the stress control of high-voltage cable accessories is mainly handled by the parameter method of heat-shrinkable materials and the geometric method of cold-shrinkable materials. [0004] However, at present, both methods have their own advantages and disadvantages: the stress tube produced by the heat shrinkage parameter stress control method has strong weather resistance, puncture resistance, long-term storage, and relatively economical price,...

Claims

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Application Information

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IPC IPC(8): H02G15/00B29C69/02C08L23/08C08L23/16C08L23/06C08L91/06C08K13/02C08K3/04C08K3/24C08K5/09C08K5/098C08K3/22C08K5/14C08K5/01B29L23/00
CPCB29C48/0018C08K2201/001C08L23/06C08L23/0853C08L23/16C08L2203/18C08L2203/20C08L2205/025C08L2205/03C08L2207/04C08L2207/066C08L2312/06H02G15/007C08L101/00C08K13/02C08K3/24C08K3/04C08K5/09C08K5/103C08L91/06C08K2003/2296C08K5/098C08K2003/2241
Inventor 邢福发胡习富饶喜梅张润川张定雄谢德璐
Owner 深圳市沃尔电力技术有限公司
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