Low-smoke and low-toxicity large-depth longitudinal watertight coaxial cable

Abstract

The invention provides a low-smoke and low-toxicity large-depth longitudinal watertight coaxial cable, which mainly comprises a central conductor unit, a plurality of coaxial inner conductor units anda cable outer sheath, wherein the plurality of coaxial inner conductor units are arranged around the central conductor unit; each of the coaxial inner conductor units and the central conductor unit comprises a conductor layer, an insulating layer, a shielding layer and an inner sheath from inside to outside; each insulating layer is extruded between the corresponding conductor layer and shieldinglayer in a pushing manner; the parts between the coaxial inner conductor units are uniformly filled with cable core water-blocking glue; and the outer sides of the plurality of coaxial inner conductor units are filled with a non-woven outer wrapping tape to be wrapped into the cable, are filled with the water-blocking glue and then are sleeved with the cable outer sheath. The low-smoke and low-toxicity large-depth longitudinal watertight coaxial cable is mainly applied to an underwater large-depth and high-water pressure environment for high-frequency signal transmission, so that the longitudinal water blocking capacity is improved, nonoccurrence of water leakage when the cable is damaged or broken is ensured, radio frequency communication in a deep water environment is ensured, and the low-smoke and low-toxicity large-depth longitudinal watertight coaxial cable has underwater large-depth longitudinal water tightness, has certain flame-retardant property and is low in smoke and low intoxicity during combustion.

Description

technical field [0001] The invention belongs to the field of cable high-frequency signal transmission, and in particular relates to a low-smoke, low-toxicity, high-frequency longitudinal watertight coaxial cable used in a deep-water environment. Background technique [0002] When some special electronic equipment works at a large depth underwater, it is necessary to transmit high-frequency signals to the electronic equipment through longitudinal watertight cables for processing to complete specific functions. Cable fires in confined spaces lead to contamination of the internal environment. [0003] Most of the existing RF coaxial longitudinal watertight cables in my country can only meet the longitudinal watertightness of relatively shallow water depths. When the water depth further increases, many cables will not be watertight in the longitudinal direction. The water is damaged; and as the water depth increases, the water pressure will gradually increase and the cable will ...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing RF coaxial longitudinal watertight cables in my country can only meet the longitudinal watertightness of relatively shallow water depths. When the water depth further increases, many cables will not be watertight in the longitudinal direction. The water is damaged; and as the water depth increases, the water pressure will gradually increase and the cable will be squeezed, thereby damaging the cable structure and causing a sharp drop in radio frequency transmission performance; in addition, in order to improve the flame retardant performance of domestic vertical watertight cables Halogen materials, such as neoprene, chlorosulfonated polyethylene, etc., once the fire spreads, not only will produce a lot of smoke, but also produce highly corrosive hydrogen halide gas with "secondary disasters", endangering human life and pollute the environment

[0004] At present, there is no low-smoke and low-toxicity longitudinal watertight coaxial cable that meets the requirements for high-frequency signal transmission of electronic equipment at large depths.

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