Large-section water-blocking conductor for submarine cable

Abstract

The present invention discloses a large-section water-blocking conductor for a submarine cable. The large-section water-blocking conductor comprises a supporting core; n round wire stranded layers are arranged at the outer side of the supporting core, wherein n is a natural number greater than or equal to 1; a plurality of round wire compressing stranded layers are arranged at the outer side of the round wire stranded layers; the round wire pressing stranded layers and shaped wires stranded layers are arranged in a staggered manner; and water-blocking layers are arranged between the round wire stranded layers, the round wire pressing stranded layers and the shaped wires stranded layers. The compressing degree of the large-section water-blocking conductor is improved, and the overall deformation of the large-section water-blocking conductor is more uniform, and therefore, a water blocking effect can be effectively improved. The large-section water-blocking conductor has the advantages of simple structure, low transformation cost, long service life and the like.

Description

technical field [0001] The invention relates to a large-section water-blocking conductor for submarine cables. Background technique [0002] At present, with the gradual development of submarine cables in the direction of large transmission capacity, DC transmission, and high voltage levels, large-section conductors are more and more widely used, and the tightness of large-section (above 2500mm2) conductors on the existing market Both are relatively low. Due to the different deformations of the round single wires in the compacting process of the existing compacted round wire stranding layer, large gaps will be left in this layer, and the gaps in this layer will also be formed when the next layer is prepared. Changes with the change of compaction, which intensifies the deformation difference between the single lines of the next layer, and finally leads to the overall low degree of compaction. In addition, various water-blocking materials need to be added in the preparation pr...

AI Technical Summary

Problems solved by technology

[0002] At present, with the gradual development of submarine cables in the direction of large transmission capacity, DC transmission, and high voltage levels, large cross-section conductors are more and more widely used, and the tightness of large cross-section (above 2500mm2) conductors on the existing market Both are relatively low. Due to the different deformations of the round single wires in the compacting process of the existing compacted round wire twisted layer, large gaps will be left in this layer, and the gaps in this layer will also be formed when the next layer is prepared. Changes with the change of compaction, which intensifies the deformation difference between the single lines of the next layer, and finally leads to the overall low degree of compaction. In addition, various water-blocking materials need to be added in the preparation process of each layer. The overall The degree of deformation is more uneven, which not only affects the degree of compaction, but also greatly affects the water-blocking effect, resulting in poor water-blocking performance of large-section conductors, which cannot meet the requirements of submarine cables for water-blocking performance of conductors

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