Feeding deep-sea optical cable

Abstract

The invention provides a feeding deep-sea optical cable, which comprises an optical unit, an armored layer, a feeding layer and an insulating layer, and is characterized in that the armored layer comprises an inner stranded layer and an outer stranded layer, the inner stranded layer is provided with a plurality of first stranding metal wires, the outer stranded layer is provided with a plurality of second stranding metal wires and a plurality of third stranding metal wires, the second stranding metal wires and the third stranding metal wires are alternatively arranged in sequence, and the diameter of the third stranding metal wires is less than the diameter of the second stranding metal wires; the plurality of first stranding metal wires are stranded outside the optical unit, the second stranding metal wires and the third stranding metal wires are stranded on the first stranding metal wires at intervals, the third stranding metal wires are stranded on the second stranding metal wires, and stranding directions are the same. The feeding deep-sea optical cable improves the impact resistance, the flattening resistance and the mechanical stretching performance of submarine cables, improves the longitudinal water blocking performance and the radial water blocking performance of the submarine cables, reduces the manufacturing cost and maintenance cost of the submarine cables, reduces damages for an optical fiber in the manufacturing process and improves the insulating performance of the submarine cables.

Description

technical field [0001] The invention belongs to the technical field of submarine cables, and in particular relates to a feeding deep-sea optical cable. Background technique [0002] Submarine optical cable is a high-end variety with the highest technical content, the most difficult manufacturing, and the most complex application environment in the "big family" of cable products. Trans-ocean intercontinental communication, national defense communication, marine exploration and monitoring network construction. The current common deep-sea optical cables have the following deficiencies: [0003] ①. It is very difficult to fill the water-blocking material, it is difficult to fill it full, and the influence of seawater itself on the conventional water-blocking material, resulting in poor longitudinal water-blocking ability of the cable. Once the optical cable breaks during use, the length of maintenance required is large. , long maintenance time; [0004] ② Poor impact resistan...

AI Technical Summary

Problems solved by technology

[0003] ①. It is very difficult to fill the water-blocking material, it is difficult to fill it full, and the influence of seawater itself on the conventional water-blocking material, resulting in poor longitudinal water-blocking ability of the cable. Once the optical cable breaks during use, the length of maintenance required is large. , long maintenance time;

[0004] ② Poor impact resistance and flattening resistance, insufficient mechanical tensile properties of the cable core, unable to meet the deployment and recovery tension requirements of the deep sea, and cannot be directly applied to the deep water environment of the deep sea;

[0005] ③ The radial water resistance of the cable is poor, and the edge of the copper strip is prone to warping during the manufacturing process, thereby causing damage to the sheath layer and reducing the insulation performance of the submarine cable;

[0006] ④. The outer longitudinal copper tape of the optical unit and the outer sheath are used as the cable core. Since there is no inner armor protection, the cable core is easily twisted during the production process, which poses a greater risk to the core unit of the submarine optical cable - the optical fiber.

Images