Polyethylene insulating steel-tape armored polyethylene-oversheath railway signal cable

Abstract

Polyethylene insulated steel tape armored polyethylene outer sheathed railway signal cable belongs to the field of railway cable technology, consisting of seven-strand four-wire cores and two insulated single wires, each quadruple core consists of four wire cores It is extruded, and the outer surface of each core is provided with an insulating ribbon, and the outer surface of each extruded four-wire group cable core is provided with an insulating cable tie, and the outer surface of the seven-strand four-wire group cable core is wound There is a cable core tape, the outer surface of the cable core tape is covered with a heat insulation layer, the outer surface of the heat insulation layer is covered with a sheath layer, and an isolation sleeve is provided outside the sheath layer, and an armor layer is provided on the outer surface of the isolation sleeve , the outer surface of the armored layer is covered with an outer sheath layer. The structure is stable, not easy to be squeezed and deformed, which makes the electrical performance of the cable more superior, ensures the stability and safety of railway transmission signals, has good insulation effect, shielding performance, flame retardant performance and anti-extrusion performance, and can greatly extend the cable 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 railway signal cable with polyethylene insulated steel tape armored polyethylene outer sheath. Background technique [0002] Railway signal cable products also have multiple 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 The demand and dependence on office informatization and home informatization, and 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 is expected to maintain an annual consumption of about 30 million core kilometers. Some special cables, such as railway...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the existing railway cables such as insulation effect, stability, extrusion resistance, poor shielding performance, and low adaptability to special occasions during use, the invention proposes a polyethylene insulating steel tape armored polyethylene outer cable The sheathed railway signal cable 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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