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High-flame-retardation, electricity-resistant and aging-resistant cable

A high flame-retardant and aging-resistant technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of reducing the service life of cables, difficult diffusion of space cables, local field strength distortion, etc., to prevent decomposition and improve DC breakdown strength and volume resistivity, the effect of gentle changes in field strength

Inactive Publication Date: 2015-10-28
ANHUI HONGHAI CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polymers are widely used in the field of electrical insulation due to their superior electrical and mechanical properties. Polyethylene has high dielectric strength and low dielectric loss, light weight, low toxicity, good mechanical durability and corrosion resistance, and is widely used It is used in power cables. However, due to the low conductivity of polyethylene during the operation of DC cables in the high-voltage field, it is difficult for the cables to spread in the space accumulated inside, causing serious distortion of local field strength, especially when there is When the temperature gradient effect occurs, this phenomenon is more serious. When the local field strength on the surface of the insulating layer reaches a certain value, it will cause partial discharge, dendification and other insulation aging phenomena. In addition, polyethylene, as an organic molecule, has a low oxygen index and is easy to Combustible materials, greatly reducing the service life of the cable

Method used

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Effect test

Embodiment 1

[0022] figure 1It is a structural schematic diagram of the high flame-retardant, electrical and aging-resistant cable described in the present invention, referring to figure 1 , a high flame-retardant, electrical, and aging-resistant cable proposed by the present invention, including a cable core, the cable core includes a conductor 1 located in the middle and an insulating layer 2 covering the outside of the conductor; an inner sheath layer 3 is provided outside the cable core , an outer sheath layer 4 is arranged outside the inner sheath layer 3, and the outer sheath layer 4 is made of a high flame-retardant modified polyethylene material, wherein the raw materials of the high flame-retardant modified polyethylene material include by weight The following components: 55 parts of low-density polyethylene, 45 parts of EPDM rubber, 45 parts of magnesium hydroxide particles, 15 parts of zinc borate, 5 parts of tricresyl phosphate, 50 parts of organically modified montmorillonite,...

Embodiment 2

[0024] refer to figure 1 , a high flame-retardant, electrical, and aging-resistant cable proposed by the present invention, including a cable core, the cable core includes a conductor 1 located in the middle and an insulating layer 2 covering the outside of the conductor; an inner sheath layer 3 is provided outside the cable core , an outer sheath layer 4 is arranged outside the inner sheath layer 3, and the outer sheath layer 4 is made of a high flame-retardant modified polyethylene material, wherein the raw materials of the high flame-retardant modified polyethylene material include by weight The following components: 80 parts of low-density polyethylene, 20 parts of EPDM rubber, 75 parts of magnesium hydroxide particles, 5 parts of zinc borate, 12 parts of tricresyl phosphate, 30 parts of organically modified montmorillonite, organically modified 40 parts of nano-magnesium oxide, 2 parts of modified nano-silica, 10 parts of ethylene-butyl acrylate copolymer, 3 parts of calc...

Embodiment 3

[0028] refer to figure 1 , a high flame-retardant, electrical, and aging-resistant cable proposed by the present invention, including a cable core, the cable core includes a conductor 1 located in the middle and an insulating layer 2 covering the outside of the conductor; an inner sheath layer 3 is provided outside the cable core , an outer sheath layer 4 is arranged outside the inner sheath layer 3, and the outer sheath layer 4 is made of a high flame-retardant modified polyethylene material, wherein the raw materials of the high flame-retardant modified polyethylene material include by weight The following components: 62 parts of low-density polyethylene, 40 parts of EPDM rubber, 63 parts of magnesium hydroxide particles, 7 parts of zinc borate, 10 parts of tricresyl phosphate, 37 parts of organically modified montmorillonite, organically modified 36 parts of nano-magnesium oxide, 3.8 parts of modified nano-silica, 9.3 parts of ethylene-butyl acrylate copolymer, 6 parts of c...

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Abstract

The invention discloses a high-flame-retardation, electricity-resistant, and aging-resistant cable. The cable comprises cable cores, each cable core comprises a conductor positioned at the central part and an insulating layer wrapping the outer part of the conductor, the outside of the cable cores is provided with an inner sheath layer, the outside of the inner sheath layer is provided with an outer sheath layer, the outer sheath layer is made of high-flame-retardation modified polyethylene materials, and raw materials of the high-flame-retardation modified polyethylene materials comprise low-density polyethylene, EPDM rubber, magnesium hydroxide particles, zinc borate, tritolyl phosphate, organic modified montmorillonite, organic modified nanometer magnesium oxide, modified nanometer silicon dioxide, ethylene-butyl acrylate copolymer, calcium stearate, epoxidized soybean oil, dicumyl peroxide, trimethylol-propane trimethacrylate, triallyl isocyanurate, anti-oxidant, and silane coupling agent. According to the high-flame-retardation, electricity-resistant, and aging-resistant cable, the intensity is high, the electricity resistance and aging resistance are good, the flame retardation performance is excellent, and the service lifetime is long.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a high flame-retardant, electricity-resistant and aging-resistant cable. Background technique [0002] Due to its many advantages in terms of stability and economy, DC transmission technology has become a hot research topic in the field of electrical engineering. High-voltage DC plastic cables are one of the key equipment for DC power transmission. They have the advantages of small size, large transmission capacity, and maintenance-free. Therefore, the research and development of DC plastic insulated cables is very important for DC power transmission. [0003] Polymers are widely used in the field of electrical insulation due to their superior electrical and mechanical properties. Polyethylene has high dielectric strength and low dielectric loss, light weight, low toxicity, good mechanical durability and corrosion resistance, and is widely used It is used in power cables. However...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/295C08L23/06C08L23/16C08L23/08C08K13/06C08K3/34C08K3/22C08K3/38C08K5/523C08K3/36C08K5/1515
Inventor 石学军
Owner ANHUI HONGHAI CABLE
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