Anti-electromagnetic interference railway digital signal cable

Abstract

The invention discloses an anti-electromagnetic interference railway digital signal cable. The cable comprises 2-20 conductive wire groups wrapped by polyester bands. Each conductive wire group comprises four stranded single wire formed by stranding of seven tin-coated copper wires. The outer surface of the stranded single wire is provided with an inner insulating layer. A covering layer covers the outer surfaces of the 2-20 conductive wire groups. A first copper layer covers the outer surface of the inner insulating layer. A steel layer covers the outer surface of the first copper layer. A second copper layer covers the outer surface of the steel layer. The first copper layer and the inner surface of the steel layer are connected in a sealed manner through a first alloy layer, and a second copper layer and the outer surface of the steel layer are connected in a sealed manner through a second alloy layer. An outer protection layer covers the outer surface of the second copper layer. The first alloy layer is composed of 78% copper, 15% iron, 3% molybdenum, 3% chromium and 1% carbon. The anti-electromagnetic interference railway digital signal cable has the advantages that the transmission attenuation of the cable is reduced, and the adaptation and the mechanical force resistance are improved.

Description

technical field [0001] The invention relates to the field of rail transit signal cables, in particular to an anti-electromagnetic interference railway digital 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. Ou...

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

Images