Longitudinal watertightness cable/wire

Abstract

Cable / wire possessing characters of water sealing in long direction includes following parts and structures: restrictive coating, water-resisting layer prepared from binding band outside cable or knitted sheath, water-resisting layer in gaps between cabling insulated cores, insulated layer outside conductor, water-resisting layer of binding band outside conductor, water-resisting layer in gaps inside stranded conductor, and metal monofilaments constituting the stranded conductor. Characters are that a water-resisting layer is formed by filling sealant to gaps between cabling insulated cores and gaps inside stranded conductor; and another water-resisting layer is formed by coating sealant on binding band outside cable or knitted sheath and layer of binding band outside conductor. Formula of sealant is composed of 100 portions of main body glue, 10-50 portions of tie resin, 1-3 portions of sulfidizer, 1-5 portions of compounding aid and 30-100 portions of flame retardant.

Description

technical field [0001] The invention relates to a cable / wire with longitudinal water sealing characteristics, belonging to the field of wire and cable manufacturing. Background technique [0002] With the rapid growth of my country's national economy, my country's electrical industry has developed rapidly. Wires and cables have developed from simple power transmission to multi-functionality. According to different uses, wires and cables have been added with some new features, such as: flame retardant, Fire-resistant, low-smoke and halogen-free, water-tight, etc. [0003] Longitudinal water-sealed cables are first used in submarine cables, ultra-high voltage cables and communication cables. Today, such as underwater vehicles, ocean detectors, water conservancy projects, oil platforms, tunnels, underground projects and buried cables, etc. Sealing performance requirements. During the use of the cable, due to the damage of the outer sheath of the cable due to environmental or h...

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the technical problems that the existing technology cannot meet the low-smoke, halogen-free and longitudinal water sealing of the cable at the same time, it is necessary to have a displacement less than 6.4mm under the water pressure of 60.MPa and below the longitudinal water pressure. technical problems, and can meet the requirements of low-smoke, halogen-free and flame-retardant; provide a cable with longitudinal water sealing characteristics, the cable can withstand the longitudinal water pressure of 6.0MPa and below, and under the action of water pressure, the displacement of the cable structure is less than 6.4mm, at the same time, the sealant used in the cable does not contain halogen, and the cable meets the requirements of low-smoke, halogen-free and flame-retardant

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