Intercity rail transit cable

Abstract

The invention provides an intercity rail transit cable, which includes a cable core and an outer halogen-free high flame-retardant tape wrapping layer, an inner liner, and a steel-plastic composite tape corrugated longitudinally. Armored layer and outer sheath; the cable core includes at least one quadruple group, the quadruple group includes four insulated single wires twisted and arranged in different colors and the outer side is covered sequentially from the inside to the outside. 1. The inner side is wrapped with a halogen-free high flame-retardant tape, the aluminum-plastic composite tape is corrugated shielding layer, the braided shielding layer and the inner sheath; the insulated single wire is composed of a copper conductor and an insulating layer covered on the outside. The invention has a reasonable structural design and adopts a soft conductor twisted structure, which solves the problems of the prior art such as the conductor is hard and the conductor is repeatedly bent due to the hardness of the conductor during the laying and installation process of the intercity rail transit cable, and the construction difficulties and the like. The cable shielding performance is strong, the shielding layer is firm, not easy to deform, and the tensile strength is high.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to an intercity rail transit cable. Background technique [0002] With the development of urban economy, the urban population has also increased, and the number of traveling population has also increased sharply. The "difficulty in traveling by car" and the lack of transportation facilities have seriously affected the development of the economy, resulting in the intercity rail transit system becoming a trend in the development of modern transportation. In the prior art, due to design defects, the cables used in the intercity rail transit system have defects such as bending performance, long-term vibration resistance performance, flame retardancy performance and poor shielding performance, resulting in difficulty in laying and signal interference during cable operation. Large, in some harsh subway environments, the long-term vibration resistance and flame retardancy of th...

AI Technical Summary

Problems solved by technology

In the prior art, due to design defects, the cables used in the intercity rail transit system have defects such as bending performance, long-term vibration resistance performance, flame retardancy performance and poor shielding performance, resulting in difficulty in laying and signal interference during cable operation. Large, in some harsh subway environments, the long-term vibration resistance and flame retardancy of the cable cannot meet the needs of use, which directly threatens the safety of trains and personnel

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