High-roundness cross-linked core medium-voltage power cable and manufacturing method thereof

Abstract

The invention discloses a high-roundness cross-linked core medium-voltage power cable and a manufacturing method thereof. The cable is characterized in that three strands of conductive wire bodies arecovered through a polypropylene filling strip at a core part, a shape with a cross section of a round structure is formed, a thickened band is arranged outside the polypropylene filling strip, an inner sheath is arranged outside the band, a steel wire armor is arranged outside the inner sheath, and an outer sheath is arranged outside the steel wire armor. Starting from the entire manufacturing process of the cable, the roundness of conductors is controlled in a conductor production stage, the roundness of the cable is improved by adjusting material, temperature and other process requirementsof a cross-linked polyethylene insulation layer in an extrusion process, a long vulcanization pipe heating mode is designed, a large catenary vertical angle mode is set, a molecular chain structure ischanged to control a drip phenomenon, and the strong guarantee for the high roundness of the entire product is achieved through modes of conductor pre-heating and the like. Under the condition of ensuring basic use of the product, the insulation and roundness of the cable are improved, and thus the service life of the cable is improved.

Description

technical field [0001] The invention relates to cable manufacturing technology, in particular to a high-roundness cross-linked core medium-voltage power cable and a manufacturing method thereof. Background technique [0002] The steel wire armored cable in the open technology has various structural forms according to the technical requirements, such as the patent announcement number is CN206134323U, a steel wire armored high-voltage cable, including a cable core, which is coated with silk braiding layer, nylon Silk layer, insulation layer, rubber tightening layer and outer sheath layer, the cable core includes two conductors and the cable core filling to fill the cable core gap, the conductor is covered with a conductor insulation layer, and at least one straight steel wire rope is also arranged in the cable core . Another example is that the patent publication number is CN106782799A, a corrugated copper-sheathed corrugated steel-sheathed steel wire armored submarine cable ...

AI Technical Summary

Problems solved by technology

At present, the conventional thick-insulated medium-voltage power cables produced in China often have poor cable roundness during the production process. Due to the poor roundness of the cable core, there will be no standard products when selecting connectors; Due to the poor roundness of the cable, the finished cable will bring construction difficulties to customers and increase construction costs; the appearance evaluation is average, the product competitiveness is not enough, and there may even be unqualified products. Products with higher roundness are large The quality pursuit goal of most manufacturers

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