Environmental protection shock absorption direct current cable for city track traffic

A technology of urban rail transit and DC cables, applied in the direction of insulating cables, cables, circuits, etc., can solve problems such as not meeting comprehensive requirements, achieve the effects of improving physical and mechanical properties, good ductility, and reducing laying space

Inactive Publication Date: 2012-07-11
YUANCHENG CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the rapid development of urban rail transit, higher requirements are put forward for the performance of DC traction cables, and the existing products can no longer meet the comprehensive requirements

Method used

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  • Environmental protection shock absorption direct current cable for city track traffic
  • Environmental protection shock absorption direct current cable for city track traffic

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Embodiment Construction

[0017] Such as figure 1 As shown, the center of the innermost layer of the present invention is a copper conductor 1, and the copper conductor 1 is provided with an insulating layer 2, a buffer layer 3, a comprehensive sheath 4, an armor layer 5 and an anti-cracking, anti-ultraviolet, low-smoke, halogen-free flame-retardant Polyolefin sheath6. The invention has excellent properties such as environmental protection, earthquake resistance and water resistance, and is used in subway tunnels. Relatively concentrated and airtight places such as light rail and stations have good social and economic benefits, specifically

[0018] The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements can also be made, and these improvements should also be regarded as the present invention. scope of protection.

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Abstract

The invention provides an environmental protection shock absorption direct current cable for city track traffic. The cable comprises a copper conductor arranged in a cable center. An insulating layer, a buffer layer, an integration protection layer, an armor layer and a cracking resistance anti ultraviolet low-smoke halogen free flame retardation polyolefin sheath are arranged in order outside the copper conductor. According to the invention, the insulating layer employs double-layer co-extrusion, internal insulation employs anti ultraviolet 150 DEG C polyethylene insulation irradiation material, and high dielectric strength of insulation is satisfied; external insulation employs anti ultraviolet 125 DEG C halogen free low-smoke flame retardation irradiation material, physical and mechanical, low-smoke, halogen free and flame retardation performance of a core are raised, a water blocking layer employs plastic-aluminum longitudinal covering and low-smoke halogen free flame retardation polyolefin extrusion, and water proof performance is raised; the buffer layer not only can play a vertical water blocking role but also can play a buffer hock absorption role well when the cable is in vibration.

Description

[0001] technical field [0002] The invention belongs to the field of electric wires and cables, in particular to an environment-friendly and shock-absorbing DC cable for urban rail transit. Background technique [0003] By 2015, the national urban rail transit operating mileage will reach more than 3,000 kilometers. At present, some second-tier cities have started the rail transit construction application process. By 2015, the total investment in national urban planning and transportation may reach 1.2 trillion yuan. DC cables for urban rail transit are used in subway tunnels, light rails, stations and other places where people are relatively concentrated and the environment is relatively closed. Because urban rail transit is mostly underground, once a fire occurs, the closed underground environment will bring great difficulties to personnel escape and firefighting work. big difficulty. These determine that the cables laid in this place should not only have high flame reta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/18H01B7/22H01B7/28H01B7/285H01B7/295H01B7/02
Inventor 刘文章迁平薛元洪储贤民
Owner YUANCHENG CABLE CO LTD
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