Fire-resistant rail communication flexible cable

A flexible cable and fire-resistant technology, applied in the direction of insulated cables, bendable cables, cables, etc., can solve the problems of poor flame retardant and fire-resistant performance, poor bending performance, and easy breakage of the end of the cable, so as to achieve the softness of the cable and improve the flexibility. , Improve the effect of long-term working temperature

Active Publication Date: 2017-04-05
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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  • Fire-resistant rail communication flexible cable
  • Fire-resistant rail communication flexible cable
  • Fire-resistant rail communication flexible cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Embodiment: A fire-resistant rail communication flexible cable, including three shielded wire groups 2 wrapped by a first polyester tape 1, and the shielded wire group 2 includes two first tinned copper wires 3 made of seven In the stranded single wire 4 formed by twisting, one of the 7 first tinned copper wires 3 is located at the center, and the other 6 first tinned copper wires are stranded at the central position. The surface of the first tinned copper wire;

[0031] The outer surface of the twisted single wire 4 has a single wire insulation layer 5;

[0032] The 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 group shielding layer 7, and a wire group isolation layer 8 is wrapped on the wire group shielding layer 7 the outer surface; the first-line group drain line 9 is located between the second polyester tape 6 and the line-group shielding layer 7;

[0033] A cable fire-...

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Abstract

The invention discloses a fireproof digital transmission flexible cable for a security signal system, which comprises three shielding line groups, wherein a single line insulation layer is arranged on the external surface of each stranded single line; each single line insulation layer consists of an outer single line insulation layer and an inner single line insulation layer located on the inner side of the outer single line insulation layer; each inner single line insulation layer accounts for 85% of the thickness of each single line insulation layer; each inner single line insulation layer is made of natural color cross-linked polyethylene insulated; each outer single line insulation layer comprises the following materials by mass percentage: 1-3% of natural color cross-linked polyethylene material and 97-99% of plastic color masterbatch; a line resistance isolation layer is 0.08-0.15mm in thickness; and two fireproof tape wrapping layers exist in a fireproof tape layer of the cable. The digital cable can eliminate the influence of metal particles in the color masterbatch distributed around a conductor on an electric field, so that the transmission attenuation of the cable is reduced; mechanical and physical properties and light and heat ageing resistance of the insulation layers are improved; a production technology is mature and stable; and performance indices of a product are increased.

Description

technical field [0001] The invention relates to the field of rail transit signal cables, in particular to a fire-resistant rail communication flexible cable. Background technique [0002] In the signal system, the signal cable used for signal has a single-core copper conductor, and the cable shielding layer is longitudinally wrapped or wrapped with copper tape, and the armoring method of the cable is double steel tape wrapped 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 the present invention is to provide a fire-resistant track communication flexible cable, which can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/04H01B7/17H01B5/08H01B7/22
Inventor 陆春良
Owner JIANGSU HENGTONG WIRE & CABLE TECH
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