Three-core optical fiber composite submarine cable

Abstract

The invention discloses a three-core optical fiber composite submarine cable, which includes cable cores and at least one optical fiber unit, wherein the cable cores and the optical fiber unit are wrapped by an adhesive cloth layer; fillers are arranged between the cable cores and between the cable cores and the optical fiber unit; a lining layer, a steel wire armoured layer and an outer covering layer are sequentially arranged on the adhesive layer; the three parallel cable cores form a circuit; and each cable core includes a water resistant conductor and an insulation layer, a shielding layer, a water resistant layer, a lead layer and a shield sleeve layer that are sequentially arranged on the water resistant conductor. The three-core optical fiber composite submarine cable facilitates avoiding severe heating at the landing end and the pole climbing part of the submarine cable after landing, reducing route occupation, enhancing shielding effect and avoiding vortex in the armoured layer.

Description

technical field [0001] The invention relates to a submarine cable, in particular to a three-core optical fiber composite submarine cable, which belongs to the technical field of submarine cables. Background technique [0002] With the development of my country's coastal wind power and new energy technologies, especially the development and utilization of marine resources, the demand for large-capacity power transmission is becoming more and more important. [0003] At present, single-core submarine cables are generally used to transmit electric energy, and there are the following disadvantages in the actual operation process: [0004] 1. Seawater is used as the cooling medium during the operation of the submarine cable. Although it does not generate heat, when the submarine cable lands, the submarine cable system is a grounding system at both ends, which will generate a large amount of heat in the metal sheath and armor layer of the submarine cable. The circulation of the l...

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Problems solved by technology

[0005] 2. Coastal resources are limited and valuable, because the laying distance of single-core submarine cables is generally about 50m, and a loop requires three single-core cables, which not only occupies the width of the route, but also increases the maintenance cost of the route and the probability of mechanical damage to the submarine cable also greatly improved

[0006] 3. Interference with the surrounding environment, because the single-core submarine cable is laid in parallel, and the electromagnetic induction generated by the single-core submarine cable cannot be canceled out, thereby causing electromagnetic interference to the surrounding environment

[0007] 4. The current in the conductor of the single-core submarine cable will cause the armor layer to circulate, resulting in energy loss

Although copper wire can be used instead of steel wire as the armor layer to reduce energy loss, but as mentioned above, copper wire is not chosen by people because its strength is lower than steel wire and its price is much higher than steel wire.

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