Multi-core submarine cable and manufacturing device therefor

The multi-core submarine cable design addresses instability and high costs by integrating power, gas, and signal transmission, improving stability and reliability through equal cross-sectional diameters and a manufacturing device for stranding, reducing production costs.

EP4756846A1Pending Publication Date: 2026-06-10ZHONGTIAN TECH SUBMARINE CABLE CO LTD +2
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Patent Information

Application Number
EP2024848117
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-07-28
Filing Date
2024-07-24
Publication Date
2026-06-10

AI Technical Summary

Technical Problem

Existing submarine cables with single three-core power cables have limited transmission capacity, increased manufacturing costs, and instability due to dynamic characteristics and temperature changes, leading to insufficient stability and reliability.

Method used

A multi-core submarine cable design incorporating a power cable, buffer and thermal insulation structural unit, and auxiliary metal unit, with equal cross-sectional diameters, and a manufacturing device for stranding these components to form a cable core, enhancing stability, reliability, and reducing production costs by integrating power, gas, and signal transmission.

Benefits of technology

The multi-core design improves electric power transmission capacity, reduces electric power loss, controls operating temperature, and ensures roundness, thereby enhancing stability and reliability while eliminating the need for additional cables, thus lowering production costs.

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Abstract

The present application provides a multi-core submarine cable and a manufacturing device thereof, where the multi-core submarine cable includes: a power cable including an electrical unit for electric conduction and an optical unit for communication; a buffer and thermal insulation structural unit including a braided rope and a first protective sheath extruded on an outer side of the braided rope; and an auxiliary metal unit including a metal tube and a second protective sheath extruded on an outer side of the metal tube; where cross-sections of the power cable and the buffer and thermal insulation structural unit are both circular, and a cross-sectional diameter of the power cable is equal to a cross-sectional diameter of the buffer and thermal insulation structural unit. The buffer and thermal insulation structural unit, the auxiliary metal unit and at least two power cables are stranded together to form a cable core of the multi-core submarine cable. The present application is capable of improving the stability and reliability of the submarine cable and reduces the production cost of the submarine cable.
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