A secondary water-proof fire-resistant cross-linked polyethylene insulated cable
By introducing elastic elements into the insulated cable, the elastic potential energy is released under fire conditions, solving the problem of easy detachment of the mica layer and improving the insulation structure integrity and reliability of the insulated cable at high temperatures.
CN122417518APending Publication Date: 2026-07-17STATE GRID HENAN ELECTRIC POWER CO ZHENGZHOU AIRPORT ECONOMIC COMPREHENSIVE EXPERIMENTAL ZONE POWER SUPPLY CO
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- STATE GRID HENAN ELECTRIC POWER CO ZHENGZHOU AIRPORT ECONOMIC COMPREHENSIVE EXPERIMENTAL ZONE POWER SUPPLY CO
- Filing Date
- 2026-05-28
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing cross-linked polyethylene insulated cables are prone to mica layer detachment under fire conditions, leading to insulation failure.
Method used
Introducing elastic elements into insulated cables allows them to release elastic potential energy under fire conditions, increasing the diameter and compressing the mica layer to maintain its encapsulating effect and prevent it from falling off.
Benefits of technology
It improves the insulation structure integrity of insulated cables at high temperatures, prevents the mica layer from sintering and becoming brittle, maintains a safe electrical clearance between adjacent conductors, avoids short circuits, and enhances insulation reliability during fires.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN122417518A_ABST
Abstract
The application provides a secondary waterproof fire-resistant crosslinked polyethylene insulated cable, and relates to the technical field of insulated cables. The second insulating layer made of crosslinked polyethylene is arranged on the wire. Before encountering fire, the second end is in a fixed state, and the elastic member simultaneously stores first elastic potential energy along the axial direction of the wire and second elastic potential energy along the trajectory direction of the elastic member. After encountering fire, the second end is switched from the fixed state to a free state, the elastic member releases the first elastic potential energy and the second elastic potential energy, the second end approaches the first end, and the diameter of the elastic member increases, so that the first part is contracted along the axial direction of the wire and expanded along the radial direction of the wire, and the second part is expanded along the axial direction of the wire and contracted along the radial direction of the wire. The second part continuously applies radial extrusion force to the mica layer inside the second part, so as to improve the wrapping effect of the mica layer, avoid the problem that the mica layer is sintered and becomes brittle when encountering fire, and easily falls off, and improve the integrity of the insulation structure of the insulated cable at high temperatures.
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