A power transmission cable with anti-icing function and preparation method thereof

Abstract

The invention relates to a power transmission cable with an anti-icing function. The power transmission cable sequentially comprises a power transmission cable inner core, an insulating layer sleeving the outside of the power transmission cable inner core, a cable shielding layer sleeving the outside of the insulating layer, and a cable sheath layer sleeving the outside of the cable shielding layer from inside to outside, wherein the power transmission cable is characterized in that an anti-icing function layer is also arranged in the middle of the insulating layer and the cable shielding layer and comprises an inner-layer high-temperature composite phase change material layer and an outer-layer low-temperature phase change material layer. The power transmission cable is reasonable in structure design and various parts are tightly combined and mutually isolated and insulated. In cold weather, the inner-layer high-temperature composite phase change material layer is capable of retarding heat escape and preventing overheat ageing of an outer-layer material; and the outer-layer low-temperature phase change material layer is capable of keeping the outer surface of the cable in a relatively low temperature state, preventing snow melting and icing, caused by heating of the inner core, of the outer surface of the power transmission cable, preventing cold shortness of the cable material and prolonging the life of the cable protection layer and the insulating layer.

Description

technical field [0001] The invention relates to a power transmission cable, which is especially suitable for a power transmission cable with an anti-icing function and a preparation method thereof. Background technique [0002] High-voltage overhead transmission lines will generate a certain amount of heat under the condition of power transmission. In the winter environment, the outdoor temperature is generally lower than zero, and that insignificant heat will be immediately absorbed by the surrounding low temperature. In the case of snow, it will lead to The attached snowflakes transform from solid form into liquid form, so-called melting into water. When the heat release rate of the high-voltage wire is slower than the solidification rate, it will condense into ice, so the high-voltage wire generally has the phenomenon of ice formation. Overweight and fracture of overhead transmission lines due to surface icing, or the collapse of iron towers and poles, cause large-scale ...

AI Technical Summary

Problems solved by technology

[0011] 1. When it snows in winter, the high-voltage transmission line freezes and causes the overweight fracture of the overhead transmission line, or the collapse of the iron tower and pole, causing a large-scale power outage

[0012] 2. Due to the heat loss of the high-voltage transmission line, the insulation layer is aged and damaged

[0013] 3. The surface of the cable proposed by the above invention is coated with a waterproof layer to slow down icing; adding carbon fiber heating wires to melt ice; wrapping the outer layer with deicing cloth and using high-pressure gas expansion to deicing; measures such as a single phase change material layer for heat dissipation cannot solve the problem The fundamental problem of snow melting and icing on the surface of high voltage cables due to heat dissipation in snowy weather

[0014] 4. When using phase-change temperature-controlled high-voltage cables, because only paraffin-based microcapsules + polyolefin phase-change materials are used, the content of effective phase-change materials is low, and its quality is less than 80%. The plasticity of olefin is quite different from that of paraffin, which is not conducive to obtaining a uniform phase change layer structure

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