Cold-resistant and bending-resistant power cable and preparation method

By introducing heating wires and multi-layer elongated hole structure heat conduction channels into the cable, combined with dynamic temperature control by temperature-sensing optical fiber, the problem of embrittlement of traditional cables in low-temperature environments is solved, realizing active heating and structural stability of the cable, and improving the cold resistance, bending resistance and operational reliability of power cables.

CN122136083APending Publication Date: 2026-06-02ZHEJIANG WANMA CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG WANMA CO LTD
Filing Date
2026-03-16
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Traditional cables are prone to embrittlement in low-temperature environments, leading to micro-cracks and fractures in the insulation layer, which can cause insulation failure, short circuits, or grounding faults, seriously affecting the reliability and safety of power supply. Existing technologies lack effective heating functions.

Method used

A heating wire is spirally wound between the insulation layer and the inner buffer layer, combined with a multi-layer elongated hole structure and thermally conductive material to form a heat conduction channel. The outer sheath is formed on the outside of the outer buffer layer by high-pressure extrusion of the sheath material, which enhances the structural stability and thermal conductivity. Temperature measuring optical fiber is introduced for dynamic temperature control.

Benefits of technology

It enables active heating of the cable in low-temperature environments, improving its flexibility and bending resistance, ensuring the reliability and safety of the cable under cold conditions, reducing the risk of cable cracking or breakage, and improving the stability and safety of power transmission.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a cold-resistant and bend-resistant power cable, comprising, from the inside out, a conductor, an insulation layer, an inner buffer layer, a heating wire, an armor layer, an outer buffer layer, and an outer sheath. The heating wire is spirally wound between the insulation layer and the inner buffer layer. The inner buffer layer, the armor layer, and the outer buffer layer are respectively provided with a first elongated hole, a second elongated hole, and a third elongated hole. The first elongated hole and the second elongated hole intersect at least partially, and the second elongated hole and the third elongated hole intersect at least partially. A sheath is extruded under high pressure outside the outer buffer layer, filling the third elongated hole, the second elongated hole, and the first elongated hole, and bonding it to the insulation layer. The sheath forms an outer sheath outside the outer buffer layer. The sheath contains a thermally conductive material, and a thermally conductive channel is formed between the insulation layer and the outer sheath. This application provides a cold-resistant and bend-resistant power cable with the advantages of increasing cable temperature, improving flexibility, and enhancing bend resistance in low-temperature environments. This application also provides a preparation method for preparing the above-mentioned cable.
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