Underground fireproof cable with self-maintenance capability

Abstract

The invention discloses an underground fireproof cable with self-maintenance capability, which comprises a cable body and a protective outer layer arranged on the outer surface of the cable body, and is characterized in that the protective outer layer comprises conductive convex rings and insulating convex rings which alternately sleeve the outer surface of the cable body at intervals; the outer diameter of the insulating convex ring is greater than that of the conductive convex ring; the protective outer layer further comprises an outer insulating layer; the outer insulating layer is sleeved outside the cable body and is supported by the insulating convex ring; a plurality of sealed cavities are enclosed by the outer insulating layer and the plurality of insulating convex rings; the conductive convex ring extends into the cavity, and the cavity is filled with electrorheological fluid; a conductive layer or a conductive wire is arranged on the inner surface of the outer insulating layer; according to the underground cable, protection against electric leakage accidents can be enhanced, electric leakage conditions can be automatically monitored, workers can quickly know the general position of electric leakage, and the safety, the service life and the maintenance capacity of the underground cable are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of cable production, in particular to an underground fireproof cable with self-checking and repairing capabilities. Background technique [0002] A cable is an electrical energy or signal transmission device, usually a rope-like cable formed by twisting several or groups of wires (at least two in each group), each group of wires is insulated from each other, and the entire outer surface is covered with a high degree of insulation The covering layer of the cable has the characteristics of internal energization and external insulation, and is used as a wire for the transmission of electricity or information from one place to another. [0003] Existing urban cables are usually pre-buried underground. The underground environment is harsh, the humidity is high, the ground conditions are complex and changeable, and the burden of power transmission is large. Therefore, underground cables are prone to aging and leak...

AI Technical Summary

Problems solved by technology

[0003] Existing urban cables are usually pre-buried underground. The underground environment is harsh, the humidity is high, the ground conditions are complex and changeable, and the burden of power transmission is large. Therefore, underground cables are prone to aging and leakage accidents. Accidents are difficult to be discovered in time and may easily cause large economic losses

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