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Flexible high-current-carrying direct-current cable insulation material and cable

A DC cable and insulating material technology, applied in the direction of insulated conductors, insulated cables, organic insulators, etc., can solve problems such as exceeding the insulating medium and medium damage, and achieve improved service life, high temperature resistance and flexibility, and excellent insulation stability Effect

Inactive Publication Date: 2016-01-13
WUXI HUAHONG INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the space charge density is high enough, the local electric field may even exceed the breakdown field strength of the insulating medium, resulting in dielectric breakdown

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] This embodiment provides a flexible high-current-carrying DC cable insulating material cable and its cable insulating material, including an alloy conductor twisted by a plurality of aluminum alloy guide wires, and the alloy conductor of the cable is wrapped in a semi-conductive wrapping in turn. Tape and semi-conductive conductor shielding layer, the outer side of the semi-conductive shielding layer is equipped with flexible high-current-carrying DC cable insulation material, the thickness of the insulating material is 1.2 times the diameter of the alloy conductor; the outer layer of the insulating material is provided with corrugated copper sleeves, polyethylene inner sheath There are two layers of extruded steel wire on the outside of the semiconductive resistance water buffer belt, the inner layer of the extruded steel wire is wound in a clockwise direction, and the outer layer of extruded steel wire is wound in a counterclockwise direction. There is a flame-retardan...

Embodiment 2

[0020] This embodiment provides a flexible high-current-carrying DC cable insulating material cable and its cable insulating material. The structure of the cable is the same as that of Example 1, and the difference lies in the composition of the insulating material.

[0021] The insulating material of the present embodiment comprises the following components in parts by mass:

[0022] Maleic anhydride grafted cross-linked polyethylene: 38 parts, ethylene-vinyl acetate copolymer: 17 parts, sodium dodecylsulfonate: 6 parts, calcium chloride: 3 parts, barium titanate: 2 parts, magnesium oxide : 2 parts, silicon dioxide: 4 parts, NX2040 curing agent: 12 parts, di-tert-butyl peroxide: 7 parts, ethylene bisstearamide: 7 parts, dibutyltin dilaurate: 5 parts, peroxide Crosslinking agent: 6 parts, composite rare earth: 2 parts; composite rare earth contains the following components by weight percentage: Y: 8%, Sc: 13%, Gd: 6%, Sm: 13%, Pr: 14%, and the balance is La.

Embodiment 3

[0024] This embodiment provides a flexible high-current-carrying DC cable insulating material cable and its cable insulating material. The structure of the cable is the same as that of Example 1, and the difference lies in the composition of the insulating material.

[0025] The insulating material of the present embodiment comprises the following components in parts by mass:

[0026] Maleic anhydride grafted cross-linked polyethylene: 42 parts, ethylene-vinyl acetate copolymer: 18 parts, sodium dodecylsulfonate: 4 parts, calcium chloride: 2 parts, barium titanate: 1 part, magnesium oxide : 1 part, silica: 2 parts, NX2040 curing agent: 14 parts, peroxide crosslinking agent: 9 parts, ethylene bisstearamide: 8 parts, dibutyltin dilaurate: 6 parts, di-( tert-butylperoxyisopropyl) benzene: 8 parts, compound rare earth: 3 parts; compound rare earth contains the following components by weight percentage: Y: 10%, Sc: 16%, Gd: 7%, Sm: 15%, Pr : 15%, the balance being La.

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PUM

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Abstract

The invention discloses a flexible high-current-carrying direct-current cable insulation material and a cable. The insulation material comprises the following components: crosslinked polyethylene, ethylene-ethylene-vinlacetate copolymer, sodium dodecyl sulfate, calcium chloride, barium titanate, magnesium oxide, silicon dioxide, an NX2040 curing agent and composite rare earth. A semi-conductive wrapping band and a semi-conductive conductor shielding layer successively wrap an alloy conductor of the cable. An external layer of the insulation material is provided with a corrugated copper sheath, a polyethylene sheath and a semi-conductive water-blocking buffer band. An outer side of the semi-conductive water-blocking buffer band is provided with two layers of extrusion molding steel wires. An outer side of each extrusion molding steel wire is provided with a flame-retardant protection sleeve. Through improving components of a cable insulation layer, high temperature resistance performance and flexibility performance are effectively increased; because a rare earth element is added in ingredients of the insulation layer, the cable possesses good high temperature resistance performance, a wear-resisting property and traction resistance performance; and a service life of the cable in a severe environment is prolonged.

Description

technical field [0001] The invention relates to a cable and its insulating material, in particular to a flexible high-current-carrying DC cable insulating material and cable, and belongs to the technical field of cable manufacturing. Background technique [0002] Extruded insulated cables are almost always used in the flexible direct transmission developed in the past ten years. This kind of flexible straight cable was first developed by the cable factory affiliated to ABB with almost no market prospects. They have been used in more than 20 projects and have considerable operating performance. There is only one company in the world that supplies insulation materials for flexible straight cables, and the working temperature is only 70°C. Compared with the insulating material whose operating temperature is 90℃, the transmission capacity of the cable made of this flexible direct current insulating material is lower. There is no domestic manufacturer supplying flexible straigh...

Claims

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Application Information

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IPC IPC(8): H01B3/44H01B3/30H01B7/04H01B7/295H01B7/18H01B7/28
CPCY02A30/14
Inventor 王国建
Owner WUXI HUAHONG INFORMATION TECH
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