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Flame retardant fire-resistant track traffic signal flexible cable

A rail transit, flame-retardant and fire-resistant technology, applied in the field of flame-retardant and fire-resistant rail transit signal flexible cables, can solve the problems of poor flame-retardant and fire-resistant performance of cables, easy breakage of ends, poor bending performance, etc., to achieve cable flexibility and improve long-term work. temperature, the effect of improving flexibility

Active Publication Date: 2012-11-07
JIANGSU HENGTONG WIRE & CABLE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the signal cable with the above structure, the conductor becomes hard and brittle due to heat, oxidation and other factors during long-term use, causing the end to be easily broken; the structural limitations of the cable make it poor in bending performance and poor in flame and fire resistance.

Method used

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  • Flame retardant fire-resistant track traffic signal flexible cable
  • Flame retardant fire-resistant track traffic signal flexible cable
  • Flame retardant fire-resistant track traffic signal flexible cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0033] Embodiment: A flame-retardant and fire-resistant rail transit signal flexible cable, including at least three shielded wire groups 2 wrapped by the first polyester tape 1, and the shielded wire groups 2 include at least two shielded wire groups 2 composed of 7 first plated wires. A twisted single wire 4 formed by twisting tin-copper wires 3, one of the first tinned copper wires among the seven first tinned copper wires 3 is located at the center, and the other six first tinned copper wires are twisted on said first tinned copper wire surface at the center;

[0034] The outer surface of the twisted single wire 4 has a single wire insulation layer 5,

[0035] The at least two twisted single wires 4 are wrapped by a second polyester tape 6, the outer surface of the second polyester tape 6 is covered with a wire resistance shielding layer 7, and a wire resistance isolation layer 8 is wrapped on the wire resistance shielding The outer surface of the layer 7; a line group of...

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Abstract

The invention discloses a flame retardant fire-resistant track traffic signal flexible cable, which comprises at least three shielding line sets wrapped by a first polyester band, wherein each of the shielding line sets comprises at least two twisted single lines formed by twisting seven first tinned copper wires; each of the twisted single lines is provided with a single line insulation layer on the external surface; the at least two twisted single lines are wrapped by a second polyester band provided with a line resistance shielding layer; a line resistance insulation layer is wrapped on the external surface of each line resistance shielding layer; and each single line insulation layer is composed of an external single line insulation layer and an internal single line insulation layer; each external single line insulation layer comprises the following materials: 1%-3% of true crosslinked polyethylene and 97%-99% of plastic color masterbatch; and each external line resistance insulation layer comprises synthetic mica paper, of which both sides are covered by fiberglass cloth through silicon resin adhesive layers. The flexible cable provided by the invention can eliminate influences on the electric field by metal particles in the color masterbatch distributed around a conductor, lower transmission attenuation of the cable, and improve the mechanical performances as well as light and thermal ageing resistance of the insulation layers.

Description

technical field [0001] The invention relates to the field of rail traffic signal cables, in particular to a flame-retardant and fire-resistant rail traffic signal flexible cable. Background technique [0002] In rail transit signal systems such as railways, subways, light rails, etc., the signal cables used to transmit rail traffic signals have single-core copper conductors, cable shielding layers are longitudinally wrapped or wrapped with copper tape, and the armoring method of the cables is double. Steel tape wrapping armor. Conventional signal cables do not have the dual functions of flame retardancy and fire resistance. In the signal cable with the above structure, the conductor becomes hard and brittle due to heat, oxidation and other factors during long-term use, causing the end to be easily broken; the structural limitations of the cable make it poor in bending performance and poor in flame and fire resistance. . Contents of the invention [0003] The object of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B11/00
CPCY02A30/00
Inventor 王国权陆春良淮平金春敏孙国跃陈夏裕
Owner JIANGSU HENGTONG WIRE & CABLE TECH
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