Anti-interference signal cable

Abstract

The invention discloses an anti-interference signal cable which comprises 2-20 conductor groups wrapped in a polyester belt. Each conductor group comprises four intertwisted single wires, wherein each single wire is formed by intertwisting seven tinned copper wires. An inner insulating layer is arranged on the outer surface of the intertwisted single wires. The outer surface of the 2-20 conductor groups is wrapped in a wrapping layer. The outer surface of the inner insulating layer is wrapped in a first copper layer. The outer surface of the first copper layer is wrapped in a steel layer. The outer surface of the steel layer is wrapped in a second copper layer. The first copper layer and the inner surface of the steel layer are connected through a first alloy layer in a sealed mode. The second copper layer and the outer surface of the steel layer are connected through a second alloy layer in a sealed mode. The outer surface of the second copper layer is wrapped in an outer protection layer. The first alloy layer is composed of 70-82% of copper, 14-22% of iron, 3-5% of molybdenum, 2-3% of chromium and 0.8-1% of carbon. The second alloy layer is composed of 25-35% of copper, 60-70% of iron, 3-5% of molybdenum, 2-3% of chromium and 0.8-1% of carbon. According to the anti-interference signal cable, the transmission attenuation of the cable is lowered, the sealing performance and the mechanical external force resistance are improved, and it is guaranteed that no cracking happens in the using process.

Description

technical field [0001] The invention relates to the field of rail transit signal cables, in particular to an anti-interference signal cable. Background technique [0002] In order to improve the cable's ability to resist the interference of external electromagnetic fields and prevent the electromagnetic field from radiating to the outside when the cable is running, and improve the stability and reliability of the cable operation, the sheath structure of the transmission cable generally needs to be equipped with an anti-electromagnetic interference shielding layer. The traditional cable sheath is generally composed of the following structural layers: the cladding layer covering the outer layer of the cable core, the general cladding layer is a cladding layer made of extruded plastic sleeves or various strips, Its function is to make the cable core structure tight and prevent burns or damage during the process, and to protect the cable core. Outside the cladding layer is an e...

AI Technical Summary

Problems solved by technology

[0003] The characteristics of the sheath of the above-mentioned cables are that the structure is relatively complicated, the outer diameter of the cable is large, the cable is heavy, the manufacturing process is complicated, the manufacturing cost is high, the construction cost is also high, and the bending performance of the cable is relatively poor.

Due to the limited strength of the shielding copper tape or aluminum tape, it is easy to break during the cable manufacturing and use process, resulting in the discontinuity of the shielding body, resulting in potential safety hazards in system operation

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