A cross-linked polyethylene insulated overhead cable with rapidly cross-linked silane and its preparation method

By introducing a gradient design for conductor shielding and insulation shielding layers in the cable, as well as heat storage components and heat flow directional transmission components, the problem of insufficient thermal management in traditional cables is solved, thereby improving the thermal stability and electrical life of the cable.

CN121565569BActive Publication Date: 2026-05-26NORTHEAST PLASTIC CABLE CO LTD
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Patent Information

Application Number
CN202610078205.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-01-21
Publication Date
2026-05-26
Estimated Expiration
2046-01-21

AI Technical Summary

Technical Problem

Traditional cables lack an active thermal management mechanism, making them prone to localized overheating under overload or poor contact conditions. The heat is difficult to dissipate, severely restricting their operational reliability and current carrying capacity.

Method used

By using cross-linked polyethylene insulated overhead cables with rapidly cross-linked silane, a gradient composite structure of conductor shielding and insulation shielding is designed, combined with thermal storage components and heat flow directional transmission components to achieve active thermal management.

Benefits of technology

It effectively prevents uncontrolled temperature rise and longitudinal heat propagation, improves the thermal stability and long-term reliability of cables, optimizes electric field distribution, reduces electrical treeing and water treeing, and provides critical electrical life protection.

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Abstract

This invention relates to the field of power cable technology and discloses a cross-linked polyethylene insulated overhead cable with rapidly cross-linked silane and its preparation method, comprising: a conductor located at the center of the cable; a conductor shielding layer extruded on the outside of the conductor; an insulation layer extruded on the outside of the conductor shielding layer; an insulation shielding layer extruded on the outside of the insulation layer; a metal shielding layer disposed on the outside of the insulation shielding layer; and an outer sheath of the cable disposed on the outside of the metal shielding layer. A heat storage component located at an area prone to overheating is disposed on the outside of the outer sheath of the cable. The heat storage component allows heat to be transferred to the cable joint or local circuit when overheating occurs due to overload, increased contact resistance, etc. Once the temperature reaches the set melting point of the phase change material, the phase change material will undergo a phase change and absorb a large amount of latent heat, thus stabilizing the temperature of the overheated area near the phase change point, forming a thermal buffer, and preventing uncontrolled temperature rise and heat spread within a certain range.
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