A cable with a monitoring line
A technology for monitoring wires and cables, applied in the direction of insulated cables, cables, circuits, etc., can solve the problems of cumbersome detection methods, failure to obtain damage information in time, and inability to realize real-time detection, etc., and achieve the effect of reducing maintenance costs
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Embodiment 1
[0027] Such as figure 1 As shown, a cable with a monitoring line (aluminum sheathed railway digital signal cable) includes an insulated core 1, polyester yarn 2 on the outside of the insulated core 1, and cable core tape 3 on the outside of multiple cores. The outside of the cable core tape 3 is an aluminum sheath 4, an inner liner 5, an armor layer 6 (such as steel tape armor), and an outer sheath 7.
[0028] There are two monitoring wire groups 8 inside the cable, and the monitoring wire groups 8 are wound inside the cable in a helical structure. Specifically, the monitoring wire group 8 is respectively arranged between the outer sheath 7 and the armor layer 6 (the outer armor layer 6 is wound spirally along with the armor gap), and between the cable cores. The number of monitoring wire groups 8 is not limited in the present invention, and can be arranged at different layers of the cable, or at different positions on the same layer.
[0029] The monitoring line group 8 inc...
Embodiment 2
[0033] Same as embodiment 1, the difference is that: the monitoring wire group 8 includes two or more monitoring wires, the monitoring wires are helically twisted together at a certain pitch, and the monitoring wires include a conductor 9 and a monitoring insulating layer 13, so The monitoring insulating layer 13 is outside the conductor 9. The conductor 9 is a tinned copper conductor, and the monitoring insulating layer 13 is coated with polyethylene material. The monitoring insulating layer 13 is provided with a plurality of monitoring slots 12 , and the plurality of monitoring slots 12 are arranged at intervals. The depth of the monitoring groove 12 does not expose the conductor 9 .
[0034] Since the monitoring groove 12 is set on the monitoring insulation layer 13, the insulation resistance drops sharply after the monitoring line group 8 encounters water, so it can be judged whether the cable is damaged by water.
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