Novel watertight cable

Abstract

The invention discloses a novel watertight cable, comprising a cable core which is obtained through intertwisting three insulation wire cores; a sheath layer is extruded on the outside of the cable core; a first EVA rubber tape laps the outside of the inner sheath in a manner of butt seam lapping; a metal weaving layer is woven on the outside of the first EVA rubber tape; a second EVA rubber tape laps the outside of the metal weaving layer in a manner of butt seam lapping; an outer protective layer is extruded from the outside of the second EVA rubber tape; and the insulation core consists of a conductor, a hot melt glue extruded on the outside of the conductor, a ethylene propylene insulation layer extruded on the outside of the holt melt glue, and a polychloroprene glue layer coated on the outside of the ethylene propylene insulation layer. The novel watertight cable is extraordinary in watertight effect between cable cores and between the cable core layers, and is easy to produce. The increase in the quantity of the cable core and the cross section does not affect the advantage of the watertight performance.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a novel watertight cable. Background technique [0002] Watertight cables are used in deep-sea equipment. As the equipment becomes more and more complex, such cables used in deep-sea equipment must not only achieve longitudinal watertight function, but also need the cable to have shielding function. In order to meet these two requirements, the current use The best way is to weave a layer of metal shielding layer outside the cable core of the cable. In order to ensure that the metal shielding layer is also watertight, two methods are mainly used: 1. The method of applying glue, that is, smearing a certain thickness on the outside of the metal shielding layer After the butyl glue is naturally dried in the shade, extrude the outer sheath. Since the outer sheath is made of butyl material, it can be well combined with the butyl glue to achieve the watertight function of the metal shiel...

AI Technical Summary

Problems solved by technology

[0004] Using the above-mentioned first method, there are mainly the following two problems: 1. The glue can stick together, but during the longitudinal water pressure test of the cable, this method cannot withstand the 7Mpa longitudinal pressure test, and its watertight performance is not good; 2 and Glue needs to be applied during the production process, and the glue can only be closed after the glue dries in the shade, so the production speed of the cable is slow

[0005] The main problem with the above-mentioned second method is that since the extruded EVA rubber is a very thin layer, it is difficult to accurately control the cable eccentricity during the cable extrusion process, and it is easy to cause leakage of the metal shielding layer in some areas. phenomenon, and in this way, the EVA rubber cannot be well adhered to the metal shield, so the overall watertight performance of the cable is very poor

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