Fire-resistant flexible communication cable for traffic signal transmission
A technology for traffic signals and flexible cables, which is applied to insulated cables, bendable cables, cables with double-stranded/quad-stranded cables, etc. The head is easy to break and other problems, so as to improve the fire resistance, improve the flexibility, and improve the long-term working temperature.
Active Publication Date: 2014-01-22
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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Embodiment
[0032] Embodiment: A fire-resistant communication flexible cable for traffic signal transmission, including at least three shielded wire groups 2 wrapped by a first polyester tape 1, and the shielded wire group 2 includes 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;
[0033] The outer surface of the twisted single wire 4 has a single wire insulation layer 5,
[0034] 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 grou...
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Abstract
The invention discloses a fire-resistant flexible communication cable for traffic signal transmission, which comprises at least three shielded wire groups which are wrapped by a first polyester tape. Each shielded wire group comprises at least two stranded single wires which are respectively formed by seven first tinned copper wires in a stranded way. The at least two stranded single wires are wrapped by second polyester tapes. The outer surfaces of the second polyester tapes are covered by wire resistance shielding layers. The outer surface of each wire resistance shielding layer is covered by a wire resistance isolating layer. A single wire insulating layer consists of an outer single wire insulating layer and an inner single wire insulating layer. The outer single wire insulating layer consists of the following materials in percentage by weight: 1-3 percent of true-color cross-linked polyethylene materials and 97-99 percent of plastic color master batches. Glass fiber fabrics are bonded on the two sides of synthesized mica paper through silicon resin adhesive. The number of wrapped layers of fire-resistant wrapping tapes in a cable fire-resistant wrapping tape layer is two. The flexible cable provided by the invention has the advantages that the influence of metal particles which are distributed in color master batches around conductors on an electric field can be eliminated and the transmission attenuation of the cable is reduced; the mechanical and physical performance and the light and heat aging resistance of the insulating layer are improved.
Description
technical field [0001] The invention relates to the field of traffic signal cables, in particular to a fire-resistant communication flexible cable for traffic signal transmission. 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 ...
Claims
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IPC IPC(8): H01B11/02H01B11/06H01B7/02H01B7/04H01B7/17H01B7/29H01B7/295H01B7/22
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