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...

Examples

Embodiment

[0013] Embodiment: An anti-electromagnetic interference railway digital signal cable, including 4 wire groups 2 wrapped by polyester tape 1, and the wire group 2 includes four twisted single wires 3 twisted by 7 tinned copper wires , one of the 7 tinned copper wires is located at the center, and the remaining 6 tinned copper wires are twisted on the outer surface of the tinned copper wire located at the center;

[0014] The outer surface of the twisted single wire 3 has an inner insulating layer 4, a cladding layer 5 is wrapped on the outer surface of the four wire groups 2, a first copper layer 6 is wrapped on the outer surface of the inner insulating layer 4, A steel layer 7 is coated on the outer surface of the first copper layer 6, and the outer surface of the steel layer 7 is covered with a second copper layer 8; between the first copper layer 6 and the inner surface of the steel layer 7, a first The alloy layer 9 is sealed and connected, and the second copper layer 8 and...

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...

Examples

Embodiment

[0013] Embodiment: An anti-electromagnetic interference railway digital signal cable, including 4 wire groups 2 wrapped by polyester tape 1, and the wire group 2 includes four twisted single wires 3 twisted by 7 tinned copper wires , one of the 7 tinned copper wires is located at the center, and the remaining 6 tinned copper wires are twisted on the outer surface of the tinned copper wire located at the center;

[0014] The outer surface of the twisted single wire 3 has an inner insulating layer 4, a cladding layer 5 is wrapped on the outer surface of the four wire groups 2, a first copper layer 6 is wrapped on the outer surface of the inner insulating layer 4, A steel layer 7 is coated on the outer surface of the first copper layer 6, and the outer surface of the steel layer 7 is covered with a second copper layer 8; between the first copper layer 6 and the inner surface of the steel layer 7, a first The alloy layer 9 is sealed and connected, and the second copper layer 8 and...

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