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High-voltage cable

A high-voltage cable and cable core technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of burning the cable, affecting the transmission efficiency of the cable, easily causing leakage current, etc., and achieving the effect of excellent flame retardant performance and excellent mechanical and physical properties.

Inactive Publication Date: 2014-08-06
STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the maturity of high-voltage and ultra-high voltage transmission technology, the market demand for high-voltage and ultra-high voltage cables is increasing day by day. Because the environment of cable lines is different, and some places are relatively humid and dirty, even bare wires, due to the electric field The surface of the cable is still very easy to cause leakage current, which will generate a lot of heat and form a large resistance value, which will affect the transmission efficiency of the cable. In severe cases, the cable will be burned
However, cables with outer sheaths in the prior art are not suitable for high-voltage applications. Therefore, the power industry expects high-quality cables that can be applied to high-voltage transmission

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] please see figure 1 , a high-voltage cable, which includes a conductor 1, an insulating layer 3 that is extruded and coated on the conductor, a shielding layer 4 that is coated on the insulating layer, and a sheath layer 5 that is extruded and coated on the outside of the shielding layer. , it is characterized in that described sheath layer is calculated by weight, is made up of following raw material: Medium-density polyethylene or high-density polyethylene for commercially available electric wire and cable: 85~100 parts;

[0044] Ethylene-vinyl acetate copolymer: 10-20 parts;

[0045] Titanium dioxide with fineness less than 400 mesh: 5-8 parts;

[0046] Carbon black with a fineness of less than 400 mesh: 2 to 4 parts;

[0047] Aluminum hydroxide: 5-10 parts;

[0048] Titanium trioxide: 2 to 6 parts;

[0049] Antioxidant for cable sheathing material of commercially available model 1010 or 1076: 1 to 3 parts;

[0050] Polyethylene wax: 2 to 4 parts;

[0051] Fine...

Embodiment 2

[0053] please see figure 2 , a high-voltage cable, which includes a conductor 1, an inner shielding layer 2 coated outside the conductor, an insulating layer 3 coated outside the inner shielding layer by extrusion molding, a shielding layer 4 wrapped outside the insulating layer, and an extrusion molding It is composed of a sheath layer 5 coated outside the shielding layer, and is characterized in that the sheath layer is composed of the following raw materials in parts by weight: commercially available medium-density polyethylene or high-density polyethylene for wire and cable: 85-100 share;

[0054] Ethylene-vinyl acetate copolymer: 10-20 parts;

[0055] Titanium dioxide with fineness less than 400 mesh: 5-8 parts;

[0056] Carbon black with a fineness of less than 400 mesh: 2 to 4 parts;

[0057] Aluminum hydroxide: 5-10 parts;

[0058] Titanium trioxide: 2 to 6 parts;

[0059] Antioxidant for cable sheathing material of commercially available model 1010 or 1076: 1 to...

Embodiment 3

[0064] please see image 3 , a high-voltage cable, including a cable core formed by placing three insulated conductors in a triangular cross section, a shielding layer 4 wrapped outside the cable core, and a sheath layer 5 coated outside the shielding layer by extrusion molding. The core gap is filled with fillers 6 that prevent the positions of the three insulated conductors from moving, and each insulated conductor includes a conductor 1 and an insulating layer 3 coated outside the conductor; it is characterized in that the sheath layer is calculated by weight and consists of the following Raw material composition:

[0065] Commercially available medium-density polyethylene or high-density polyethylene for wire and cable: 85 to 100 parts;

[0066] Ethylene-vinyl acetate copolymer: 10-20 parts;

[0067] Titanium dioxide with fineness less than 400 mesh: 5-8 parts;

[0068] Carbon black with a fineness of less than 400 mesh: 2 to 4 parts;

[0069] Aluminum hydroxide: 5-10 pa...

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Abstract

The invention belongs to the technical field of cables, in particular to a high-voltage cable. The high-voltage cable comprises a conductor, an insulating layer, a shielding layer and a sheath layer, wherein the insulating layer coats the conductor in an extrusion molding manner, the shielding layer coats the insulating layer, and the sheath layer coats the shielding layer in an extrusion molding manner and is made from the following raw materials in parts by weight: 85-100 parts of middle / high-density polyethylene, 10-20 parts of an ethylene-vinyl acetate polymer, 5-8 parts of titanium dioxide with the fineness smaller than 400 meshes, 2-4 parts of carbon black with the fineness smaller than 400 meshes, 5-10 parts of aluminum hydroxide, 2-6 parts of titanium sesquioxide, 1-3 parts of an antioxidant with the market type of 1010 / 1076 as a cable sheath material, 2-4 parts of polyethylene wax, and 25-35 parts of mica or silicon carbide or titanium oxide with the fineness smaller than 400 meshes. The high-voltage cable has the main beneficial effects of excellent mechanical and physical performance, electric insulation property, environment crack resistance, aging resistance, heat resistance, fire resistance, strong current resistance and flame resistance.

Description

technical field [0001] The invention belongs to the technical field of cables, in particular to a high-voltage cable. Background technique [0002] With the maturity of high-voltage and ultra-high voltage transmission technology, the market demand for high-voltage and ultra-high voltage cables is increasing day by day. Because the environment of cable lines is different, and some places are relatively humid and dirty, even bare wires, due to the electric field The effect of the cable surface is still very easy to cause leakage current, thereby generating a large amount of heat, forming a large resistance value, affecting the transmission efficiency of the cable, and in severe cases, the cable will be burned. However, cables with outer sheaths in the prior art are not suitable for high-voltage applications. Therefore, the power industry expects high-quality cables that can be used for high-voltage transmission. Contents of the invention [0003] In order to solve the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B7/17C08L23/06C08L23/08C08K3/22C08K3/04C08K3/34
CPCY02A30/14
Inventor 龚永祥
Owner STATE GRID SHANDONG ELECTRIC POWER
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