Polyethylene insulating comprehensive sheath armored polyvinyl-chloride oversheath railway signal cable

Abstract

The invention discloses a polyethylene insulating comprehensive sheath armored polyvinyl-chloride oversheath railway signal cable, and belongs to the technical field of railway cables. The cable consists of a five-strand and four-wire cable core, two single-strand insulating wires and a cable core pair. Each strand of the four-wire cable core is formed by the extruding of four wire cores, the cable core pair is formed by the extruding of two insulating wire cores, and the external surface of each wire core is coated with an insulating colored tape. The external surface of each strand of the four-wire cable core and the cable core pair after extruding is provided with an insulating ribbon. The external surface of the five-strand and four-wire cable core and the cable core pair is provided with a cable core wrapping tape in a winding manner, and the two single-strand insulating wires are disposed between the four-wire cable core and the cable core pair, and the external surface of the cable core wrapping tape is coated with a moisture-proof shielding. The external surface of the moisture-proof shielding is coated with an inside liner, the exterior of the inside liner is provided withan armored layer, and the external surface of the armored layer is coated with an oversheath layer. The cable is better in insulating effect, shielding performances, flame resistance and extruding resistance, and can greatly prolong the service life.

Description

technical field [0001] The invention belongs to the technical field of railway cables, and relates to a railway signal cable, in particular to a polyethylene insulated comprehensive sheath armored PVC outer sheathed railway signal cable. Background technique [0002] Railway signal cable products also have various signal functions such as broadband network, IPTV, transmission telephone, fax, videophone, anti-theft alarm, etc. With the rapid development of intelligent buildings, computer industrialization and information highway projects, people are more and more With the demand and dependence on office informatization and home informatization, the demand for metal cables will increase day by day, which is the development direction of metal cables. [0003] Due to the expansion of the railway signal cable market capacity, the traditional railway signal cable market size is expected to maintain an annual consumption of about 30 million core kilometers. Some special cables suc...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing railway cables in the course of use, such as insulation effect, stability, extrusion resistance, poor shielding performance, and low adaptability to special occasions, a polyethylene insulated comprehensive sheathed armored polychloride cable is proposed. The railway signal cable with vinyl outer sheath can improve the insulation, shielding, flame retardant and extrusion resistance of the cable, can enhance the performance of the cable in harsh environments, and can greatly extend the service life of the cable

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