Highly flexible cable utilized by rail transit vehicle

Abstract

The invention relates to a highly flexible cable utilized by a rail transit vehicle. The highly flexible cable comprises a cable core conductor that is formed by tin-coated copper wires according to a normal left-hand intertwisting mode; and an inside liner, an insulating layer and an oversheath are successively arranged at an external surface of the cable core conductor from inside to outside. The cable core conductor is formed by bunched wires formed by tin-coated copper filaments according to a normal left-hand intertwisting mode. Or two outermost layers of the cable core conductor are formed by the tin-coated copper wires according to a normal left-hand intertwisting mode; and the rest of the layers are formed by the bunched wires formed by the tin-coated copper wires according to a normal left-hand intertwisting mode. A polyester film inside liner, an irradiation crosslinking low smoke halogen free polyethylene insulating layer and a tension polyurethane elastomer oversheath with oil resistance and wear resistance are successively arranged at the external surface of the cable core conductor from inside to outside. According to the invention, the highly flexible cable has high flexibility and the wiring space is effectively reduced; besides, the highly flexible cable has advantages of bending resistance, oil resistance, scraping and grinding resistances and low loss and the like.

Description

technical field [0001] The invention relates to cables, in particular to a cable for rail transit vehicles. Background technique [0002] At present, my country's urban rail transit has entered a period of rapid development, and rail transit will become the backbone of public transportation in megacities and the main public transportation mode in large and medium-sized cities. As one of the supporting electrical equipment for rail transit vehicles to transmit energy and transmit information - cables for rail transit vehicles play an important role in the entire rail transit system. At present, there are many quality problems in the cables used in rail transit vehicles. One of them is that the flexibility and flexibility of the cables are relatively poor. The space is large. [0003] There are currently no highly flexible cables specifically designed for use in rail vehicles. The patent document with the application number CN200920047902.5 discloses a flexible cable for co...

AI Technical Summary

Problems solved by technology

The patent document with the application number CN200920047902.5 discloses a flexible cable for communication. The outer sheath is PVC. This material is highly sensitive to temperature. , the molecular mobility and air heat loss of the material are large, and the durability is poor; the patent document with the application number CN200920213944.1 discloses a flexible cable, whose cable core includes a cotton fiber braided layer, which has poor tensile resistance and is easy to break

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