Light high-strength submarine optical cable

Abstract

The invention discloses a light high-strength submarine optical cable which comprises an optical unit, an aluminum layer, a bonding layer, a high-density PE layer, a steel wire and a PP rope which aresequentially arranged from inside to outside. By means of the mode, according to the light high-strength submarine optical cable, the aluminum layer is extruded through an aluminum extruding machineand is tightly attached to the optical unit without gaps,so that the water blocking problem of the cable core is thoroughly solved; meanwhile, the torsion resistance of the cable core is obviously improved, and in the armoring process, if the cable core has defects, back twisting is not needed, and direct online repairing can be achieved; besides, the aluminum extruding speed can reach 60 m / min, andproduction time is basically not increased; and due to the fact that the force bearing piece is the outer armored steel wire, the mechanical property is excellent, and the insulating property is good.

Description

technical field [0001] The invention relates to the technical field of submarine optical cables, in particular to a light-weight high-strength submarine optical cable. Background technique [0002] With the in-depth implementation of the marine strategy, global broadband speeds up, and the submarine optical cable market continues to expand. As an important connection hub for countries around the world, submarine optical cables have high technical thresholds, high requirements for production qualifications, and relatively considerable profits. Countries around the world The development of humanities, economy, social, technology, etc. has driven the demand for information transmission, thereby promoting the development of the submarine optical cable industry. All submarine optical cable suppliers are increasing investment in research and development, research and development of low-cost and high-performance submarine optical cables, and seize domestic and foreign market. [0...

AI Technical Summary

Problems solved by technology

[0003] In the existing cable structure, water blocking is required between the copper-plastic composite tape and the optical unit. After the fault point is salvaged, the water seepage part needs to be cut off to make a splice box to prevent water from entering the splice box and affecting the optical fiber transmission performance; the product structure and The following problems exist in the production: 1) Copper-plastic composite tapes are unconventional raw materials, generally do not have inventory, need to be processed and customized, and the procurement cycle is long, 25-30 days, which will affect product delivery; 2) The water blocking effect is difficult to guarantee, and the light unit Glue needs to be filled with the copper-plastic composite tape, and the filling degree of the glue will affect the water blocking effect, and it is difficult to ensure the water seepage performance of the entire submarine cable; 3) The production process of the cable core is complicated, and copper-plastic composite tape will appear during the production process Broken belts will lead to material stripping if light, and lead to segmentation if severe; 4) During the armoring production process, since the cable core has no steel wire load-bearing unit, it will cause torsion in the cable core. The density PE layer is missing and needs to be repaired online, and the risk of twisting the cable core is high

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