A kind of production process of armored steel wire outer sheath of submarine cable

Abstract

The invention discloses a production process for the outer sheath of a submarine cable armored steel wire, which includes wire pay-off, steel wire straightening, hot melt adhesive coating, extrusion of the outer sheath, cooling of the outer sheath, power frequency spark detection and steel wire Take-up steps. The steel wire pay-off uses a reel that meets the requirements of the steel wire reeling, and uses a pay-off frame with stable rotation speed to rotate and pay off the wire; A variety of different specifications; the hot-melt adhesive is pre-heated by an electric heating glue barrel and kept warm continuously, so that the hot-melt adhesive has good fluidity, and the hot-melt adhesive flows into the coating barrel to carry out the heating on the steel wire. Coating; the extruded outer sheath is carried out using a plastic extruder that meets the requirements of extruding steel wires of different diameters. The process of the invention is safe and reliable, can meet the waterproof requirements of the armored steel wire, prevent the steel wire from being corroded by the underwater environment, ensure that the armored layer has good mechanical properties during the long-term underwater operation of the submarine cable, and thus relatively prolong the use of the submarine cable. life.

Description

technical field [0001] The invention relates to a submarine cable production process, in particular to a production process for a submarine cable armored steel wire outer sheath. Background technique [0002] With my country's vigorous development of the marine industry and the implementation of the strategic policy of building a powerful marine country, the construction of offshore wind power, offshore oil and gas, and island power grids have entered a period of rapid development. The demand for applications has also increased dramatically. [0003] Since submarine cables are mostly used underwater, they are quite different from land cables in terms of structural design and performance requirements. First of all, submarine cables have extremely stringent requirements for water-blocking performance. Good water-blocking performance is required from the cable conductor to the plastic sheath, from the radial direction to the longitudinal direction. Secondly, different from the...

AI Technical Summary

Problems solved by technology

Fiber braided rope has the advantages of high tensile strength, wear resistance, and simple processing technology, but the processing technology of sparse wrapping determines that fiber braided rope cannot play a good role in water resistance.

After the submarine cable is laid underwater, the steel wire armor layer will be directly exposed to the water. Although the current industry uses galvanized armored steel wires before production and coating asphalt on the armored layer during the production process to alleviate the armored steel wires. The extent of water corrosion, but related studies have shown that the failure period of the armored steel wire is still far less than the design life of the submarine cable itself. Therefore, there is an urgent need to develop an effective waterproof method to solve the problem of submarine cable armored steel wire