Multi-core photoelectric composite watertight cable used for deep sea system

Abstract

The invention discloses a multi-core photoelectric composite watertight cable used for a deep sea system. The multi-core photoelectric composite watertight cable comprises an inner layer optical unit, an outer layer electrical unit, a wrapping layer and an outer sheath which are arranged from inside to outside in sequence; the electrical unit consists of multiple shielded twisted pairs; the optical unit and the electrical unit are stranded in the same direction; the wrapping layer is formed by spirally winding the periphery of the outer layer electrical unit with a two-sided water-blocking band with thickness of 0.20-0.50mm; the outer sheath is prepared from a water-blocking sealant and a polyurethane elastomer by adopting a two-layer co-extrusion process; a tensile layer is additionally arranged between the outer sheath and the wrapping layer; the gap is filled with low-smoke halogen-free filling strips and water-blocking ointment; and the tensile layer is formed by winding the exterior of the wrapping layer with water-blocking aramid fiber beams. The cable can work for a long time in a position of 3,000m underwater, and the maximum tensile strength can reach 30KN; and meanwhile, the cable has excellent tensile, water blocking and wear resisting properties and can satisfy requirements of feed and signal transmission at the same time.

Description

technical field [0001] The invention belongs to the technical field of cables, and in particular relates to a multi-core photoelectric composite watertight cable for deep sea systems, which is used for power transmission and signal transmission of equipment. Background technique [0002] With the advancement of the national marine power strategy, from expanding the blue economic space to promoting the construction of marine economic demonstration zones, the research and development of surface ships, deep-sea detection equipment, polar ships, etc. [0003] "If a worker wants to do a good job, he must first sharpen his tools." The development of a marine power calls for new core technologies. The defense of national sovereignty requires the support of marine engineering and technology, and the development of marine resources also requires advanced marine engineering equipment to "open the way." [0004] The environment in the deep sea field is complex, which puts forward small...

AI Technical Summary

Problems solved by technology

Ordinary watertight cable sheath adopts a single-layer extrusion process, the nominal thickness of the sheath layer is above 2.0mm, the outer diameter of the cable is large, the weight is heavy, and it does not have zero buoyancy effect. To solve this problem, the present invention provides a Multi-core photoelectric composite watertight cable for deep sea system

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