Medium-pressure water-tree-retardant crosslinked polyethylene cable material and cable using cable material

A cross-linked polyethylene, water-tree-resistant technology, applied in the direction of insulated cables, cables, circuits, etc., can solve problems such as the problem of cable water tree production, and achieve excellent water-blocking effect, stable cable performance, and cable Better electrical/mechanical/environmental performance

Inactive Publication Date: 2015-09-02
JIANGSU ZHONGLI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the medium-voltage anti-water tree material and cable structure disclosed in the above-mentioned documents cannot solve the water tree production problem of the cable well, mainly the problem of how to prevent the water tree production after the water inside the cable enters, and the dry waterproof problem of the cable. Wait

Method used

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  • Medium-pressure water-tree-retardant crosslinked polyethylene cable material and cable using cable material
  • Medium-pressure water-tree-retardant crosslinked polyethylene cable material and cable using cable material

Examples

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Effect test

Embodiment 1

[0043] Implementation example 1 is an implementation example of the cable material of the present invention, and implementation example 2 and implementation example 3 are implementation examples of the cable of the present invention.

[0044] Implementation Example 1

[0045] The medium-voltage water-tree-resistant cross-linked polyethylene cable material is characterized in that it is composed of the following raw materials and contents in parts by weight:

[0046] Low-density polyethylene: 40-60 parts;

[0047] Medium density polyethylene: 15 to 30 parts;

[0048] Polypropylene: 5-10 parts;

[0049] Polyolefin elastomer: 3 to 5 parts;

[0050] Titanium dioxide: 1 to 3 parts;

[0051] Polyethylene wax or paraffin: 4 to 6 parts;

[0052] Carbon black: 1 to 3 parts;

[0053] Dicumyl peroxide: 0.5 to 1.5 parts;

[0054] Hydroxyethyl acrylate or methacrylate: 15-25 parts;

[0055] Antioxidant 168 or Antioxidant 1010: 0.8-2.0 parts;

[0056] Dimethylaminoethyl methacryl...

Embodiment 2

[0065] please see figure 1 , the anti-water tree XLPE cable 10 has a single conductor 1 and an outer sheath 7 located outside the conductor, and is characterized in that the conductor is extruded and coated with an insulating layer 2, and the insulating layer is coated with a shielding layer 3, There is a first water blocking layer 4 outside the shielding layer, an inner sheath 5 outside the first water blocking layer, a second water blocking layer 6 outside the inner sheath, and the outer sheath is extruded and coated on the outside of the second water blocking layer; The material of the inner sheath and the outer sheath is commercially available XLPE cable material or the medium-voltage water-tree-resistant XLPE cable material described in Example 1, and the maximum gap between the insulating layer and the conductor is 0.1 μm ; From the inner sheath to the first water-blocking layer, the first water-blocking layer is air-tight and liquid-tight; on any cross-section perpendic...

Embodiment 3

[0075] please see figure 2 , a three-core structure anti-water tree XLPE cable, which is characterized in that it contains three anti-water tree XLPE cables in Example 1, and the three anti-water tree XLPE cables are placed in pairs tangentially, The three anti-water tree XLPE cables have a position fixing layer 80 on the outside, a third water blocking layer 81 coated on the outside of the position fixing layer, and a water blocking sheath 82 on the outside of the third water blocking layer.

[0076] The above-mentioned three-core structure anti-water tree XLPE cable is characterized in that the material of the position-fixing layer is polyester tape or non-woven fabric or water-blocking tape.

[0077] The above-mentioned three-core structure anti-water tree XLPE cable is characterized in that the material of the third water blocking layer is aluminum strip, steel strip or copper strip.

[0078] The above-mentioned three-core structure anti-water tree cross-linked polyethyl...

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Abstract

The invention belongs to the technical field of materials and cables, and particularly relates to a medium-pressure water-tree-retardant crosslinked polyethylene cable material. The medium-pressure water-tree-retardant crosslinked polyethylene cable material is characterized by being composed of the following raw materials in parts by weight: low density polyethylene, medium density polyethylene, polypropylene, polyolefin elastomer, titanium dioxide, polyethylene wax or paraffin, carbon black, dicumyl peroxide, hydroxyethyl acrylate or hydroxyethyl methylacrylate, an antioxidant 168 or an antioxidant 1010, and dimethylaminoethyl methacrylate or ethylene glycol methacrylate or hydroxyethyl methacrylate, and a moisture-absorption compound. The cable material disclosed by the invention has the beneficial effects of easily available raw materials, low price, reasonable formula, simple manufacturing method and the like and is easy to prepare and easy for batch and scale production. The invention also discloses a preparation method of the cable material and a cable adopting the cable material. The cable disclosed by the invention has the beneficial technical effects of good water resistance, no water tree generation, more stable cable performance, high reliability and the like and is easy to produce.

Description

technical field [0001] The invention belongs to the technical field of cables and materials, in particular to a medium-voltage water-tree-resistant XLPE cable material and a cable using the material. Background technique [0002] At present, most of the medium-voltage power cables are insulated with XLPE. Ordinary XLPE insulated cables are damaged by mechanical stress or external force during laying and operation, or the cables are operated for a long time in a humid and watery environment. Both will cause external moisture to penetrate into the cable, and the chance of forming water trees under the action of an electric field will greatly increase. Once the outer sheath of the cable is damaged and the cable enters water, the steel strip and copper strip will be corroded, the insulation performance will be reduced, and the service life of the cable will be greatly shortened. [0003] At present, there are two main solutions for anti-water tree cables, one is dry design, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L23/00C08L31/04C08L33/20C08L33/26C08L29/04C08L91/06C08K13/02C08K3/22C08K3/04H01B7/28H01B7/282
CPCC08L23/06C08L2203/202C08L2205/025C08L2205/035C08L2207/04C08L2207/066C08L2312/00H01B7/2813H01B7/2825C08L23/12C08L23/00C08L31/04C08L33/20C08L33/26C08L29/04C08K13/02C08K2003/2241C08K3/04C08L91/06
Inventor 雷建设王达伟邵海彬王世通何文斌黄钰
Owner JIANGSU ZHONGLI GRP CO LTD
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