Cross-linked polyethylene insulated halogen-free low-smoke flame-retardant rat-proof and termite-proof medium-voltage power cable

Abstract

The invention discloses a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant rat-proof and termite-proof medium-voltage power cable, which comprises a cable core and a flame-retardant wrapping tape, the cable core is embedded in the flame-retardant wrapping tape, and the cable core comprises three conductor wire cores, each conductor wire core comprises a conductor which is sequentially coated with a conductor shielding layer, a cross-linked polyethylene insulating layer, an insulating shielding layer and a metal shielding layer from inside to outside, and a gap between the flame-retardant wrapping tape and the cable core is filled with a filling layer; the conductor shielding layer, the cross-linked polyethylene insulating layer and the insulating shielding layer are formed by co-extruding three layers; the cable adopts a three-layer co-extrusion technology to extrude the conductor shielding layer, the crosslinked polyethylene insulating layer and the insulation shielding layer at one time, so that the adhesive performance among the three layers after cabling is met, and the layering phenomenon does not occur after extrusion; and the conductor shielding layer is not easy to scratch, so that excellent insulation and mechanical properties of the cable are ensured.

Description

technical field [0001] The invention belongs to the technical field of cables, and relates to a cross-linked polyethylene insulated halogen-free low-smoke flame-retardant rodent-proof medium-voltage power cable. Background technique [0002] Power cables are generally buried in the soil or laid indoors, in trenches, and tunnels. The insulation distance between lines is small, no poles and towers are used, the land occupation is small, and the space on the ground is basically not occupied. It is less affected by climate conditions and surrounding environments, and the transmission performance is stable. , high reliability. Therefore, it is widely used in various industries. [0003] Cable is a wire product that transmits electric energy, electric signal and realizes the conversion of electromagnetic energy. It usually consists of a cable core that transmits electric power or electric signal and a sheath that plays a role of protection and insulation. Traditional cables are ...

AI Technical Summary

Problems solved by technology

Traditional cables are easy to get entangled and difficult to untangle when using, which requires cutting the cable to untangle the entangled cables, which will cause a waste of resources; and the chances of the cables being damaged by termites and mice are also corresponding Increase, when termites and mice bite through the sheath, water or moisture will penetrate into the cable along the longitudinal or radial gap of the cable, resulting in insulation aging due to water trees, and cable insulation breakdown in a short period of time. Cause power outages, severe short circuits, fires and other accidents, resulting in immeasurable losses

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