Railway digital signal cable with overall performance

Abstract

The invention relates to a railway digital signal cable with overall performance. The railway digital signal cable comprises a cable core located in the center of the whole cable, an outer sheath made of nylon is arranged outside the cable core, a plurality of non-shielding four-wire sets and a plurality of shielding four-wire sets are arranged inside the cable core, the cable core is wrapped by a cable core wrapping belt in a longitudinal or a surrounding mode, a metallic shield pipe is arranged outside the cable core wrapping belt, an inside liner is arranged outside the metallic shield pipe, a steel-tape armoring layer is arranged between the inside liner and the outer sheath, and the non-shielding four-wire sets and the shielding four-wire sets are formed by twisting a plurality of insulating single lines. Gaps between the metallic shield pipe and the cable core wrapping belt and gaps between the cable core wrapping belt and the non-shielding four-wire sets and the shielding four-wire sets are tightly filled with magnesium oxide.

Description

technical field [0001] The invention provides a signal cable, in particular to a railway digital signal cable with comprehensive performance. Background technique [0002] According to incomplete statistics, in the past ten years across the country, due to improper operation during the railway construction process, there have been hundreds of major accidents that caused cable short circuits to catch fire and spread to disasters. According to the survey, among the many cable fire accidents in China, 20% of the total number of cable fires were caused by the failure of the cable itself; and the cable sheath was broken, flattened and squeezed, and sharp objects were inserted into the cable core during the construction process. 80% are caused by internal combustion of cables. When the cable is broken, flattened and squeezed, or sharp objects are inserted into the cable core, causing the cable core to short-circuit and catch fire, if the corresponding fire prevention measures ar...

AI Technical Summary

Problems solved by technology

When the cable is broken, flattened and squeezed, or sharp objects are inserted into the cable core, causing the cable core to short-circuit and catch fire, if the corresponding fire prevention measures are not designed in the cable core or the design is improper, the flame will burn along the short-circuit point, ranging from Temporary parking of trains is caused, and in severe cases, the system is chaotic, the consequences are unimaginable, and the losses are huge

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