Cross-linked polyethylene insulated PVC sheathed cable and preparation process thereof

Abstract

The invention discloses a cross-linked polyethylene insulated PVC sheathed cable and a preparation process thereof, the cable comprises a PVC outer sheath, a steel tape armor layer, a first mica tape,a polyvinyl chloride inner sheath, a cable unit, a filling rope between the inner sheath and the cable unit, and the cable unit comprises a copper tape shield layer, a cross-linked polyethylene insulating layer, a second mica tape, a conductor shield layer, a conductor from the outside to the inside, wherein, the conductor is formed by a plurality of copper wires stranded and tightly pressed. Thecable cross-linked polyethylene insulated PVC sheath has a simple structure, convenience of manufacturing and processing, reasonable processing technology, the process of inhibiting the breakdown phenomenon of plastic insulation tree is added, the insulation reliability of the cable is expended, and the cable is high temperature resistant, combustion resistant, and high in safety in use.

Description

technical field [0001] The invention relates to the field of power cables, in particular to a cross-linked polyethylene insulated polyvinyl chloride sheathed cable and a preparation process thereof. Background technique [0002] Power cables are cables used to transmit and distribute electric energy. They have been used for more than 100 years. Power cables are often used in urban underground power grids, outgoing lines of power stations, internal power supply of enterprises under working conditions, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the backbone lines of power systems, including various voltage levels of 1-500KV and above, and various insulation types. power cable. Power cables are divided into oil-impregnated paper insulated power cables, plastic insulated power cables, and rubber insulated ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of dendritic breakdown in plastic insulated cables in the prior art, the insulation material is easily damaged by high temperature, the insulation reliability and structural stability are poor, and the safety hazard is large, the present invention provides a cross-linked polyethylene insulated polyvinyl chloride Sheathed cable and its preparation process, the cable is made of cross-linked polyethylene insulation layer and PVC sheath, the voltage stabilizer component is added to the cable material, and ultra-clean and ultra-smooth extrusion is added in the cable preparation process The process of multi-layer processing can suppress the occurrence of electric tree, water tree and dendritic breakdown phenomenon in plastic insulation to the greatest extent, so that the cable of the present invention can be used as a high-voltage cable. Flammable mica tape, so that the use of the cable will not be affected and damaged by high temperature, and the use is safer

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