一种矿物绝缘电缆的防潮封端方法及防潮封端结构
The dual sealing structure of inner and outer sealants solves the problem of moisture intrusion at the sealing end of mineral-insulated cables, achieving long-term sealing stability in high-temperature and humid environments, extending cable service life and improving insulation performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANGHAI ELECTRIC CABLE RES INST
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-17
AI Technical Summary
Mineral-insulated cables are susceptible to moisture intrusion at the end caps, leading to rapid deterioration of insulation performance. Existing end capping methods are not stable in sealing under high temperature and humid conditions, increasing the risk of short circuits and fires and shortening service life.
It adopts a dual sealing structure with an inner sealant and an outer sealant. The inner sealant is composed of silicone resin, silica, alumina, calcium oxide, boron oxide and magnesium oxide, while the outer sealant is composed of silicate filler and silicone resin. Through curing treatment, a dense layer is formed to provide double protection.
It significantly improves the moisture resistance reliability of the ends of mineral-insulated cables, has excellent high-temperature resistance, ensures that the seal does not fail in high-temperature environments, extends service life, slows down the corrosion of metal sheaths, and improves the stability of insulation resistance.
Smart Images
Figure CN120878373B_ABST
Abstract
Citation Information
Patent Citations
Ablation-resistant fire-retardant sealing adhesive and preparation method thereof
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Cable inorganic mineral insulating layer
CN109801737A