A fire-and moisture-resistant subway cable

Abstract

The invention discloses a fire-and moisture-resistant subway cable, which includes a cable body, a waterproof layer, a flame retardant layer, support sleeves, cable branches and connection assemblies;the cable body is arranged in a multi-layer structure, and the outermost layer of the cable body is arranged as a sheath, the sheath covers the waterproof layer, and the waterproof layer is inside coated with a flame retardant layer, plurality of support sleeves are arranged in the flame retardant layer, the support sleeves are arranged in an equidistant arrangement in the flame retardant layer,a flame retardant filling layer is arranged between adjacent support sleeves, a plurality of cable branches are arranged in the flame retardant layer, and a plurality of cable branches are respectively arranged in the middle of the flame retardant layer and the support sleeve, and the cable branches comprise a moisture-proof layer, an insulating layer and a guide core each. The water-proof layer arranged in the cable can effectively prevent water from infiltrating into the inside of the cable, thus protecting the internal structure of the cable, and the moisture-proof layer arranged in the cable branch line can prevent water vapor from eroding the guide core, thereby affecting the normal operation of the circuit and further protecting the safety of the cable.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a fire-resistant and moisture-proof subway cable. Background technique [0002] It is usually a rope-like cable twisted by several or groups of wires (at least two in each group), each group of wires is insulated from each other, and is often twisted around a center, and the entire outer surface is covered with a high degree of insulation overlay. The cable has the characteristics of internal electrification and external insulation. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multi-strand wires and insulation layers, and are used to connect circuits, electrical appliances, etc. [0003] Most of the current cables used in subways have poor fire resistance...

AI Technical Summary

Problems solved by technology

[0003] Most of the current subway cables have poor fire resistance and are easy to catch fire; the moisture-proof effect is poor, and it is easy to cause corrosion and aging of the cable; and the compression resistance is not strong, and it is easy to be damaged during transportation and installation.

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