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An underground cable protection device

A protective device and underground cable technology, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of ineffective extension of cable life, inability to solve underground cable damage, poor anti-corrosion and waterproof effects, etc., to prevent external electromagnetic wave interference , Excellent mechanical properties, prolonging the service life

Inactive Publication Date: 2020-04-07
国网河南省电力公司杞县供电公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention only coats the underground cable with anti-corrosion coating, which has poor anti-corrosion and waterproof effects, cannot solve the damage caused by the sudden increase of external pressure to the underground cable, and cannot effectively prolong the service life of the cable.

Method used

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  • An underground cable protection device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] refer to figure 1 , this embodiment provides an underground cable protection device, including a cable 1 and a protective sheath wrapped outside the cable 1; the protective sheath includes a first insulating layer 2, a metal layer 3 and a second insulating layer from the inside to the outside layer 4; the metal layer 3 is made of galvanized steel strip; the material of the second insulating layer 4 is polycarbonate. The first insulating layer 2 is made of raw materials in parts by weight shown in Table 1.

[0027] The filler is a mixture of nano-silica and modified illite powder, and the weight ratio of nano-silica:modified illite powder is 1:5. The anti-corrosion agent is made of the following components in parts by weight: 10 parts of hexamethylenetetramine, 5 parts of magnesium chromate, and 20 parts of magnesium metaborate. The waterproofing agent is polymethyltriethoxysilane. The reinforcing agent is a mixture of basalt fiber and polyvinylpyrrolidone, and the we...

Embodiment 2

[0034] This embodiment provides an underground cable protection device, which is different from Embodiment 1 in that: the first insulating layer is made of raw materials in parts by weight shown in Table 1. The filler is a mixture of nano-silica and modified illite powder, and the weight ratio of nano-silica:modified illite powder is 1:5. The anti-corrosion agent is made of the following components in parts by weight: 10 parts of hexamethylenetetramine, 5 parts of magnesium chromate, and 20 parts of magnesium metaborate. The waterproofing agent is sodium methyl silicone. The reinforcing agent is a mixture of basalt fiber and polyvinylpyrrolidone, and the weight ratio of basalt fiber: polyvinylpyrrolidone is 1:0.2.

Embodiment 3

[0036] This embodiment provides an underground cable protection device, which is different from Embodiment 1 in that: the first insulating layer is made of raw materials in parts by weight shown in Table 1. The filler is a mixture of nano-silica and modified illite powder, and the weight ratio of nano-silica:modified illite powder is 1:6. The corrosion resistant agent is made of the following components in parts by weight: 10 parts of hexamethylenetetramine, 6 parts of magnesium chromate, and 21 parts of magnesium metaborate. The waterproofing agent is sodium methyl silicone. The reinforcing agent is a mixture of basalt fiber and polyvinylpyrrolidone, and the weight ratio of basalt fiber: polyvinylpyrrolidone is 1:0.2.

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Abstract

The invention provides an underground cable protection device, and belongs to the technical field of electric power facilities. The device comprises a cable and a protective sleeve wrapping the cable;the protective sleeve sequentially comprises a first insulating layer, a metal layer and a second insulating layer from inside to outside; the first insulating layer is prepared from the following raw materials in parts by weight: 28-35 parts of fluorosilicone rubber, 20-26 parts of phenolic resin, 3-5 parts of a filler, 6-9 parts of a corrosion-resistant agent, 7-10 parts of a waterproof agent,5-8 parts of a reinforcing agent, 30-34 parts of ethyl ether, and 35-40 parts of water. According to the device, three-layer protection can be carried out on the underground cable; the damage of an external pressure to the cable can be effectively relieved; the device is excellent in water resistance, corrosion resistance and aging resistance, high in mechanical strength and excellent in comprehensive performance; the service life of the underground cable is effectively prolonged; and safe operation of an underground power distribution network is guaranteed.

Description

technical field [0001] The invention relates to the technical field of electric power facilities, in particular to an underground cable protection device. Background technique [0002] A cable is a wire made of one or more mutually insulated conductors surrounded by an insulation and a protective layer, and is used to transfer power or information from one place to another. In the modern society, due to the shortage of urban land, high traffic pressure, city appearance construction and other reasons, many cables have also gone underground from the original overhead. Compared with overhead lines, underground cables have the advantages of small footprint, reliable power transmission, and strong anti-interference ability. Because underground cables are buried deep below the surface of the earth, they need to bear the pressure from the ground and even the stress from the inside of the earth's surface due to the movement of the earth's crust. The existing cables are usually made...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/02H01B7/17H01B7/18H01B7/22H01B7/28H01B7/282H01B7/295C08L83/08C08L61/06C08L39/06C08K13/06C08K3/36C08K3/34C08K3/38H01B3/28
CPCC08L83/08C08L2203/202C08L2205/03H01B3/28H01B7/0216H01B7/17H01B7/1875H01B7/22H01B7/28H01B7/2806H01B7/2825H01B7/295C08L61/06C08L39/06C08K13/06C08K3/36C08K3/346C08K3/38
Inventor 郭光李雪峰霍草原王飞宋爱琴郭芹魏涛吴国松杜磊邵洁张翱李诗标姜喆
Owner 国网河南省电力公司杞县供电公司
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