Low-attenuation signal transmission cable

Abstract

The invention discloses a low-attenuation signal transmission cable. One of seven tin-coated copper wires is arranged at the center position, and other six tin-coated copper wires are stranded and arranged at the outer surface of the central tin-coated copper wire; a steel layer covers the outer surface of a first steel layer, and a second steel layer covers the outer surface of the steel layer; the first steel layer and the inner surface of the steel layer are connected in a sealed manner through a first alloy layer, and the second steel 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 steel layer; and the second alloy layer is composed of 25% copper, 69% iron, 3% molybdenum, 2% chromium and 1% carbon. The low-attenuation signal transmission cable is capable of absorbing a magnetic field in an electromagnetic field, and the shielding performance of an electric field is improved after two times of absorption.

Description

technical field [0001] The invention relates to the field of rail transit signal cables, in particular to a low-attenuation signal transmission 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 lay...

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