A cold-resistant railway digital signal cable

Abstract

The present invention provides a cold-resistant railway figure signal cable. The cold-resistant railway figure signal cable comprises a cable core and a cable protective layer at the outer side of the cable core; the cable core includes at least one wire set, each wire set having a glass cotton tube and a plurality of insulated single wires internally putted together; and the cable protective layer includes a PET band taped covering, a thermal-protective coating, a metal shielding layer, an inner liner layer, a steel tape armoring layer, a glass cotton tube layer and an outer sheath layer. The glass cotton tube included by the wire set and the glass cotton tube included by the cable protective layer are taken as cold-resistant materials of the cable to play an effect on double protection. The cold-resistant railway figure signal cable is light, antibacterial and antifungal, ageing resistant, corrosion resistant and good in environmental protection performance, has performances such as A1-level fireproofing, no burning forever, low hygroscopicity, low heat conductivity coefficient, high thermal insulation property, crushing resistance, impact resistance and the like, and cannot have the problems that the cable is compressed and deformed and the cable core is broken after the pipeline or the groove is frozen, etc.

Description

technical field [0001] The invention belongs to the technical field of cables, in particular to a cold-resistant railway digital signal cable. Background technique [0002] Railway digital signal cables are used as railway train control automatic devices and ground equipment for overspeed protection systems, microcomputer interlocking, microcomputer monitoring systems, high-power electric switch machines and other related signal equipment and control devices to transmit control information, monitoring information and electric energy. The function is extraordinary, and it plays a very important role in ensuring the safety of trains and personnel. Ordinary railway digital signal cables have poor water resistance and water vapor permeability, poor shielding effect, and low mechanical strength. Due to design requirements, railway digital signal cables often need to be laid in fixed pipes or grooves along railway tracks. In some areas, water in pipes or tanks often freezes. Once...

AI Technical Summary

Problems solved by technology

Ordinary railway digital signal cables have poor water resistance and water vapor permeability, poor shielding effect, and low mechanical strength. Due to design requirements, railway digital signal cables often need to be laid in fixed pipes or grooves along railway tracks. In the region, the water in the pipeline or tank often freezes. Once the water freezes, the volume of the water will increase, causing the cable to be compressed and deformed, and the cable core to be broken, which will seriously threaten the safety of the train and personnel.

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