220kV交联聚乙烯绝缘低烟无卤护套电力电缆
By introducing a three-layer co-extrusion structure consisting of a conductor shielding layer, an insulation shielding layer, and a wrapping semi-conductive layer into the cable, and combining it with high-quality materials, the problems of insufficient electromagnetic interference resistance and flame retardancy in existing cables have been solved, achieving a high-performance cable design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOSTAR CABLE CO LTD
- Filing Date
- 2025-07-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing 220kV cross-linked polyethylene insulated power cables are inadequate in terms of electromagnetic interference resistance and flame retardancy, and the flame retardant performance of the outermost sheath is poor.
The cable adopts a three-layer co-extrusion structure consisting of a conductor shielding layer, an insulation shielding layer, and a wrapping semi-conductive layer. Combined with a metal sheath, an anti-corrosion layer, and a non-metallic outer sheath, it uses high-quality materials such as annealed soft copper conductors, ultra-clean XLPE insulation material, and low-smoke halogen-free sheath material to improve the cable's electromagnetic interference resistance and high-voltage performance.
The cable has excellent electrical conductivity, flame retardancy, high temperature resistance, wear resistance, long service life and environmental performance. It has high smoke transmittance and low toxic and harmful gas content, which improves the stability and safety of the cable.
Smart Images
Figure CN224519567U_ABST
Abstract
Claims
1. A 220 kV cross-linked polyethylene insulated low smoke zero halogen sheath power cable comprising a conductor (1), characterized in that: The conductor (1) is provided with a wrapped semiconductive layer (2), a conductor shielding layer (3), an insulating layer (4) and an insulating shielding layer (5) in sequence. The conductor shielding layer (3), the insulating layer (4) and the insulating shielding layer (5) are formed by three-layer co-extrusion. The insulating shielding layer (5) is provided with a wrapped semiconductive buffer layer (6) outside. The wrapped semiconductive buffer layer (6) is provided with a metal sheath (7) outside. The metal sheath (7) is provided with an anti-corrosion layer (8) outside. The anti-corrosion layer (8) is provided with a non-metallic outer sheath (9) outside. The non-metallic outer sheath (9) is provided with an outer conductive layer (10) outside. The semiconductive buffer layer (6), the metal sheath (7), the anti-corrosion layer (8) and the non-metallic outer sheath (9) form a comprehensive protective body.
2. The 220 kV cross-linked polyethylene insulated low smoke zero halogen sheath power cable according to claim 1, characterized in that: The conductor (1) is an annealed soft copper conductor with a cross-sectional area of 400-2500 mm 2 .
3. The 220 kV cross-linked polyethylene insulated low smoke zero halogen sheath power cable according to claim 1, characterized in that: The conductor (1) adopts a segmented structure.
4. The 220kV cross-linked polyethylene insulated low-smoke halogen-free sheathed power cable according to claim 1, characterized in that: The conductor shielding layer (3) is a 220kV-level ultra-smooth chemical cross-linked semiconducting inner shielding layer, and the insulating shielding layer (5) is a 220kV-level ultra-smooth chemical cross-linked outer shielding layer.
5. The 220 kV crosslinked polyethylene insulated low smoke zero halogen sheath power cable according to claim 1, characterized in that: The insulation layer (4) is a 220kV-grade ultra-clean chemical cross-linked polyethylene insulation layer.
6. The 220 kV crosslinked polyethylene insulated low smoke zero halogen sheath power cable according to claim 1, characterized in that: The wrapped semiconductive buffer layer (6) is a semiconductive buffer strip, which includes a substrate-free layer, a carbon black + polymer layer and an adhesive layer.
7. The 220 kV crosslinked polyethylene insulated low smoke zero halogen sheath power cable according to claim 1, characterized in that: The metal sheath (7) is electrical aluminum.
8. The 220 kV crosslinked polyethylene insulated low smoke zero halogen sheath power cable according to claim 1, characterized in that: The anti-corrosion layer (8) is cable asphalt.
9. The 220kV cross-linked polyethylene insulated low-smoke halogen-free sheathed power cable according to claim 1, characterized in that: The non-metallic outer sheath (9) is a low-smoke, halogen-free, flame-retardant polyolefin sheath material.
10. The 220 kV crosslinked polyethylene insulated low smoke zero halogen sheath power cable according to claim 1, characterized in that: The outer conductive layer (10) is graphite.