High-flame-retardant direct-current cable with space charge resistance and termite prevention characteristics

By adopting multi-layered DC cables, using modified materials and ceramic composites to improve insulation performance and flame retardant performance, the shortcomings of existing DC cables in space charge and termites are solved, and efficient cable protection is achieved.

CN222690389UActive Publication Date: 2025-03-28ZHEJIANG WANMA CO LTD
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Patent Information

Application Number
CN202421433017.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-20
Publication Date
2025-03-28
Estimated Expiration
2034-06-20

AI Technical Summary

Technical Problem

The insulation performance of existing DC cables is average, it is difficult to suppress space charge, is susceptible to termite damage, and has poor flame retardant performance at high temperatures.

Method used

The structure is adopted including conductors, inner insulating layer, outer insulating layer, ceramic fire-resistant composite belt, armored layer, and sheath. The inner insulating layer is styrene grafted modified polypropylene, the outer insulating layer is organically modified montmorillonite synergistic magnesium hydroxide flame-retardant polypropylene, and a ceramic halogen-free flame-retardant sheath and bimodal polyethylene armored cushion layer are added where necessary.

Benefits of technology

It achieves high flame retardant performance, space charge resistance and termite protection effects, ensuring that the cable is not easy to burn under high temperature environments and prevents termite invasion.

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Abstract

The utility model, which relates to the technical field of the direct-current cable, discloses a high-flame-retardant direct-current cable with characteristics of space charge resistance and termite resistance, comprising a conductor, an inner insulating layer, an outer insulating layer, a first ceramic fireproof fire-resistant composite belt, an armor layer, a second ceramic fireproof fire-resistant composite belt and a sheath which are wrapped in sequence, the inner insulating layer is made of styrene graft modified polypropylene, and the outer insulating layer is made of organic modified montmorillonite and magnesium hydroxide flame-retardant polypropylene. The technical effects of the utility model lie in that the cable has the characteristics of space charge resistance and termite resistance, and also has high flame retardant performance.
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