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High-strength medium-high voltage power cable

A power cable, medium and high voltage technology, applied in the field of high strength medium and high voltage power cables, can solve the problems of water absorption, low electrical insulation, low polyethylene strength, low safety performance, etc., and achieve high heat resistance stability and activity, and reduce Crystal grain size, effect of improving weather resistance

Inactive Publication Date: 2019-05-07
ANHUI TIAN CHANG INSTR FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Polyethylene is a thermoplastic resin obtained by polymerization of ethylene. It is odorless, non-toxic, and feels like wax. It has excellent low temperature resistance, good chemical stability, and can withstand most acids and alkalis. It is insoluble in general solvents at room temperature. , low water absorption, excellent electrical insulation, so it is widely used in the insulation or sheath material of power cables, but the strength of polyethylene is low, easy to break, and the safety performance is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high-strength medium and high-voltage power cable, including a cable core, an insulating layer, a shielding layer, a fireproof layer and an outer sheath. The raw materials of the outer sheath include: 80 parts by weight of polyethylene, hydrogenated styrene-butadiene 10 parts of block copolymer, 0.5 parts of rare earth modified rigidifying nucleating agent, 5 parts of nano boron nitride, 2 parts of coupling agent, 1 part of 1076 antioxidant.

[0018] Rare earth modified stiffening nucleating agent is prepared by the following process: 3-aminophthalic anhydride, isophorone diamine, maleimide, rare earth Nitrate, add 3-aminophthalic anhydride and isophorone diamine into water and heat to 95°C, react for 5h, then raise the temperature to 115°C and adjust the pH to 9, add maleimide and praseodymium nitrate to react After 3 hours, the rare earth modified stiffening nucleating agent was obtained after filtering, washing and drying.

Embodiment 2

[0020] A high-strength medium-high voltage power cable, including a cable core, an insulating layer, a shielding layer, a fireproof layer and an outer sheath, wherein the raw materials of the outer sheath include 120 parts by weight of polyethylene, hydrogenated styrene-butadiene 20 parts of block copolymer, 5 parts of rare earth modified stiffening nucleating agent, 10 parts of nano diopside, 5 parts of coupling agent, 3 parts of 168 antioxidant.

[0021] Rare earth modified stiffening nucleating agent is prepared by the following process: Weigh 3-aminophthalic anhydride, isophorone diamine, maleimide, rare earth Nitrate, add 3-aminophthalic anhydride and isophorone diamine into water and heat to 100°C, react for 9 hours, then raise the temperature to 125°C and adjust the pH to 10, add maleimide and cerium nitrate to react After 5 hours, the rare earth modified stiffening nucleating agent was obtained after filtering, washing and drying.

Embodiment 3

[0023] A high-strength medium and high-voltage power cable, including a cable core, an insulating layer, a shielding layer, a fireproof layer, and an outer sheath. The raw materials of the outer sheath include: 100 parts by weight of polyethylene, hydrogenated styrene-butadiene 15 parts of block copolymer, 2 parts of rare earth modified stiffening nucleating agent, 7 parts of nano molecular sieve, 4 parts of coupling agent, 2 parts of 1076 antioxidant.

[0024] Rare earth modified stiffening nucleating agent is prepared by the following process: 3-aminophthalic anhydride, isophorone diamine, maleimide, rare earth Nitrate, add 3-aminophthalic anhydride and isophorone diamine into water and heat to 98°C, react for 7 hours, then raise the temperature to 120°C and adjust the pH to 9.5, add maleimide and lanthanum nitrate to react After 4 hours, the rare earth-modified stiffening nucleating agent was obtained after filtering, washing and drying.

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PUM

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Abstract

The invention discloses a high-strength medium-high voltage power cable. The power cable comprises a cable core, an insulating layer, a shielding layer, a fire proof layer and an outer sheath, whereinraw materials of the outer sheath comprises polyethylene, hydrogenated styrene-butadiene block copolymer, a rare earth modified stiffening nucleating agent, a nano reinforcing filler, a coupling agent and an antioxidant. The rare earth modified stiffening nucleating agent is prepared by the following process: adding 3-aminophthalic anhydride and isophorone diamine to water for carrying out a heating reaction, then heating and adjusting pH, adding maleimide and a rare earth nitrate and carrying out a reaction, and then performing filtering, washing and drying to prepare the rare earth modifiedstiffening nucleating agent. The protective sheath material of the power cable has high strength, good wear resistance and weather resistance, so that protection requirements of medium-high voltage power cables can be satisfied.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a high-strength medium-high voltage power cable. Background technique [0002] Power cables are cable products used to transmit and distribute high-power electric energy in the main line of the power system, including 1-500KV and above various voltage levels and various insulated power cables. The basic structure of a power cable consists of a cable core (conductor), an insulating layer, a shielding layer, a fireproof layer and a protective layer. [0003] Polyethylene is a thermoplastic resin obtained by polymerization of ethylene. It is odorless, non-toxic, and feels like wax. It has excellent low temperature resistance, good chemical stability, and can withstand the erosion of most acids and alkalis. It is insoluble in general solvents at room temperature. , low water absorption, excellent electrical insulation, so it is widely used in the insulation or sheath material of powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L53/02C08L79/08C08L51/06C08K13/06C08K9/04C08K3/28C08K7/06C08K7/24H01B7/04H01B7/18H01B7/28H01B9/02
CPCY02A30/14
Inventor 毛文章张萍梁钰
Owner ANHUI TIAN CHANG INSTR FACTORY
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