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A preparation method of a soft and anti-bending rail transit DC traction cable

A rail transit and DC traction technology, applied in the field of power cables, can solve the problems of insulation and component damage, cable reliability and service life reduction, water resistance of XLPE, etc. The effect of good and high insulation resistance

Active Publication Date: 2016-08-24
WUXI MINGZHU CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the rail transit DC traction cables used in the rail transit traction system are mainly cross-linked polyethylene insulated cables. Ethylene has the problem of water resistance. If it is exposed to water vapor for a long time, it is easy to cause water tree breakdown. Therefore, in order to prevent water vapor from entering, an aluminum-plastic composite tape polyethylene waterproof layer is used outside the cable core, making the cable more difficult to bend, and the track The laying environment of transportation cables is generally relatively narrow, especially in subway tunnels. This will inevitably cause excessive bending of the cables when used in small spaces, causing damage to the internal insulation and components of the cables, and finally causing the cables to run for a period of time. , there will be various accidents such as breakdown, and the reliability and service life of the cable will be greatly reduced.

Method used

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  • A preparation method of a soft and anti-bending rail transit DC traction cable

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Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, a soft bending-resistant rail transit DC traction cable according to the present invention includes a conductor 1 arranged in the center of the cable and an insulating layer 2, a water-blocking layer 3, a fire-proof layer 4, Armored shielding layer 5; the outermost layer of the cable is extruded with an outer sheath 6; the insulating layer 2 is made of ethylene-propylene rubber mixture elastomer material; the water-blocking layer 3 is double-sided water-blocking Tape structure; the fire barrier layer 4 is made of polyolefin material with a high flame retardant oxygen index; the armored layer shielding layer 5 is welded by argon arc welding of copper strip longitudinal cladding; the outer sheath Set 6 is made of halogen-free, low-smoke, UV-resistant thermosetting elastomer material.

[0020] A method for preparing a flexible and anti-bending rail transit DC traction cable, comprising the following steps:

[0021] 1) Continuous vulcanization b...

Embodiment 2

[0029] Such as figure 1 As shown, a new type of flexible and anti-bending rail transit DC traction cable according to the present invention includes a conductor 1 arranged in the center of the cable, and an insulating layer 2, a water blocking layer 3, and a fire insulating layer 4 that are sequentially extruded outside the conductor 1 1. Armored shielding layer 5; the outermost layer of the cable is extruded with an outer sheath 6; the insulating layer 2 is made of ethylene-propylene rubber mixture elastomer material; the water-blocking layer 3 is double-sided resistance Water belt structure; the fire barrier layer 4 is made of polyolefin material with a high flame retardant oxygen index; the armor layer shielding layer 5 is welded by argon arc welding of longitudinally wrapped copper strips; the outer The sheath 6 is made of halogen-free, low-smoke, UV-resistant thermosetting elastomer material.

[0030] A method for preparing a flexible and anti-bending rail traffic DC tra...

Embodiment 3

[0039] Such as figure 1 As shown, a new type of flexible and anti-bending rail transit DC traction cable according to the present invention includes a conductor 1 arranged in the center of the cable, and an insulating layer 2, a water blocking layer 3, and a fire insulating layer 4 that are sequentially extruded outside the conductor 1 1. Armored shielding layer 5; the outermost layer of the cable is extruded with an outer sheath 6; the insulating layer 2 is made of ethylene-propylene rubber mixture elastomer material; the water-blocking layer 3 is double-sided resistance Water belt structure; the fire barrier layer 4 is made of polyolefin material with a high flame retardant oxygen index; the armor layer shielding layer 5 is welded by argon arc welding of longitudinally wrapped copper strips; the outer The sheath 6 is made of halogen-free, low-smoke, UV-resistant thermosetting elastomer material.

[0040] A method for preparing a flexible and anti-bending rail traffic DC tra...

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Abstract

The invention discloses a novel flexible and anti-bending rail traffic DC traction cable, which comprises a conductor arranged in the center of the cable and an insulating layer, a water-blocking layer, a fire-proof layer, and an armored shielding layer extruded sequentially outside the conductor; the outermost layer of the cable is The layer is extruded to cover the outer sheath; the invention also discloses the production method of the cable. The present invention not only has the excellent electrical properties of conventional DC traction cables, high safety and reliability, and environmental protection performance, but also is soft and easy to bend, which can meet the needs of rail transit cables used in narrow environments and can withstand excessive bending.

Description

technical field [0001] The invention belongs to the field of power cables, and in particular relates to a preparation method of a flexible and anti-bending rail transit DC traction cable. Background technique [0002] The 21st century is a period of rapid development of my country's urban rail transit (including subways, ground light rails, and elevated light rails). Compared with other means of transportation, subways have the advantages of fast driving speed, large passenger transport volume, no floor space occupation, environmental protection and no exhaust emissions, etc. It is an effective way to solve the current urban traffic congestion and air pollution caused by exhaust emissions. With the rapid development of cities, the increasingly complex functions and the sharp increase in population, it is urgent to build a fast underground rail transit network. As an important supporting product, cables for rail transit 1500V and below DC traction systems have been widely use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B9/02H01B7/04H01B13/10H01B13/26H01B3/44H01B7/282H01B7/17H01B7/18
CPCY02A30/14
Inventor 刘家朝
Owner WUXI MINGZHU CABLE