Fireproofing and heat resistant environmental-friendly power cable

Abstract

The invention discloses a power cable which comprises a core wire, an aluminum tape layer lapping outside the core wire and steel-tape armoring arranged outside the aluminum tape layer, wherein the gap between the core wire and the aluminum tape layer is provided with silicon carbide mineral composite fillers, a polyethylene inner sheath is arranged between the aluminum tape layer and the steel-tape armoring, and a polyethylene outer sheath is arranged outside the steel-tape armoring. The invention has the advantages of good heat radiation property, long service life, strong flame retarding property, electricity saving, no toxicity and environmental protection.

Description

technical field [0001] The invention relates to a power cable, in particular to a fireproof and heat-resistant power cable. Background technique [0002] Existing flame retardant type A is filled with glass filaments. As we all know, the transmission capacity of the cable is determined by the temperature rise generated when the conductor transmits current, the temperature that the outer insulation material of the conductor can withstand for a long time, and the ability of the inner and outer insulation of the cable to dissipate heat to the surrounding medium. The traditional 8.7 / 10kV XLPE cables are three-core circular insulated cables, and the cores are filled with glass filaments with high thermal resistance. The external heat dissipation of the three-phase conductive core is extremely difficult, and most of the heat can only pass through the shield. The circumscribed edge of the copper strip and the outer sheath radiates to the surroundings, and the thermal resistance is ...

AI Technical Summary

Problems solved by technology

The traditional 8.7 / 10kV XLPE cables are three-core circular insulated cables, and the cores are filled with glass filaments with high thermal resistance. The external heat dissipation of the three-phase conductive core is extremely difficult, and most of the heat can only pass through the shield. The circumscribed edge of the copper strip and the outer sheath radiates to the surroundings, and the thermal resistance is extremely high due to the narrow effective area of ​​radiating

Glass fiber filling brings a lot of trouble to the cable production workers and on-site construction personnel. When the workshop workers are filling the glass fiber into the cable, the glass fiber fiber is flying all over the workshop. It is painful and itchy on the skin and cannot be taken out, which will seriously affect the workers' occupation. Healthy and not environmentally friendly, the glass fiber filling only meets the flame retardant ability of the cable, and the disadvantages outweigh the advantages

Both the inner and outer protection are made of ordinary polyvinyl chloride, which contains chlorine, which is very harmful. There are a lot of harmful gases floating in the extrusion process of the factory, and these gases cause relatively great harm to the human body.

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