Submarine high-voltage cable

Abstract

The invention belongs to the cable technology field and especially relates to a submarine high-voltage cable. The cable is formed by a conductive unit, a metal shielding layer, a water-resisting layer, an inner sheath, an armor layer, an outer sheath and an outer sheath protection layer which are successively arranged from inside to outside. The conductive unit is formed by a conductor, an insulating layer, an insulation shielding layer and a conductor protection layer. On any cross section, a center of a circle of the conductor is superposed with a center of a circle of the insulating layer. A diameter of the insulating layer is 1.5-5 times of a diameter of the conductor and a minimum value of an insulating layer thickness is 1.5mm. A filling rope group and a reinforced component group are alternatively distributed in an external portion of the inner sheath. The filling rope group and the reinforced component group are tightly contacted with the inner sheath. The material of the outer sheath protection layer is polyamide. The insulating layer is made of silane crosslinked polyethylene or a special material. The invention also provides a manufacturing method. The cable possesses advantages that a mechanical property redundancy amount is appropriate; resources can be saved; wear-resistant performance is good; water antiseepage performance and seawater prevention performance are possessed; a shielding property is good and a high voltage can be transmitted.

Description

technical field [0001] The invention belongs to the technical field of submarine cables, in particular to a submarine high-voltage cable and a manufacturing method thereof. Background technique [0002] The surface of the earth is divided into vast waters connected to each other by major continents called oceans. The total area of ​​the earth is about 360 million square kilometers, accounting for about 71% of the earth's surface area, which is about 2.5 times the land area. The world's oceans are a huge treasure house. It has a large number of things and rich industrial resources necessary for human beings. The five main oceans of the earth are the Pacific Ocean, the Atlantic Ocean and the Indian Ocean, the Arctic Ocean, and the Southern Ocean, most of which are bounded by land and seabed topographic lines. [0003] With the rapid development of industry, the scale of people's exploration of the ocean is increasing day by day, and the utilization value of the ocean is also...

AI Technical Summary

Problems solved by technology

[0007] However, after repeated tests, the applicant believes that there is still room for structural improvement in the prior art high-voltage cables for submarine use, which is mainly reflected in (1) excessive redundancy of the armor layer, mainly in terms of tensile strength. The main consideration in the existing technology is the roundness of the cable. Therefore, the reinforcement used in the armor layer far exceeds the required tensile strength, resulting in a waste of resources; (2) the wear resistance and anti-seepage of the outer protective layer The performance of water and seawater resistance needs to be improved; (3) The setting method of the shielding layer and the insulating layer can be further improved to better improve the performance of the cable; (4) The material of the insulating layer needs to be further developed so that it can achieve higher resistance pressure rating or performance

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