Method for manufacturing an environment-friendly medium-voltage power cable and cable

Abstract

The invention relates to a method for manufacturing an environment-friendly medium-voltage power cable and a cable. The method comprises the steps of: 1) manufacturing a wire core; 2) manufacturing acable core; and 3) manufacturing a protective layer. The step 1) comprises 1.1) wrapping a semiconductive conductor shielding layer around a conductor, wherein the semiconductive conductor shielding layer is formed by an extruded environment-friendly polypropylene semiconductive material layer, or firstly wrapping a semiconductive tape around the conductor and then wrapping the environment-friendly polypropylene semiconductive material layer around the semiconductive tape; 1.2) wrapping an insulation layer formed by extruding an environment-friendly polypropylene elastomer insulation material; 1.3) wrapping a semiconductive insulation shielding layer which is formed by extruding a strippable or unstrippable environment-friendly polypropylene semiconductive material to form a semiconductive material extrusion layer, and wrapping the semiconductive tape around the semiconductive material extrusion layer; wherein the environment-friendly polypropylene semiconductive material layer ofthe semiconductive conductor shielding layer, the insulation layer, and the semiconductive material extrusion layer of the semiconductive conductor shielding layer are formed by three-layer co-extrusion.

Description

technical field [0001] The invention relates to the field of cable technology, and in particular relates to a manufacturing method of an environment-friendly medium-voltage power cable and the cable. Background technique [0002] Traditional XLPE insulated cables have been used for many years, and special vulcanized pipes are required for cross-linking during the processing process. The equipment is expensive and the installation cost is high; the production process is complicated, the insulating material is easy to produce pre-cross-linked particles, and the degree of cross-linking is difficult to control; long-term It is easy to produce water branches and electric branches when used in humid environment, and the service life is usually 15 to 20 years. [0003] As the people yearn for a better life, the country’s requirements for environmental protection are getting higher and higher. The problem of material pollution after the cable reaches its end of life or after replace...

AI Technical Summary

Problems solved by technology

[0002] Traditional XLPE insulated cables have been used for many years, and special vulcanized pipes are required for cross-linking during the processing process. The equipment is expensive and the installation cost is high; the production process is complex, the insulating material is easy to produce pre-cross-linked particles, and the degree of cross-linking is difficult to control; long-term It is easy to produce water branches and electric branches when used in humid environment, and the service life is usually 15-20 years

[0003] As the people yearn for a better life, the country has higher and higher requirements for environmental protection. The problem of material pollution after the cable reaches the end of its life or after replacement in the process should be considered. The decomposition speed of XLPE is slow and basically cannot reach industrial grade. recycling of

Although more and more cables are now insulated with TR-XLPE, which enhances the water tree resistance of cables and prolongs the service life of cables, but it still cannot solve the problem of material recycling and reprocessing

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