0.6/1 kv waterproof tensile power cable for shallow seas

Abstract

The invention discloses a 0.6/1 kV waterproof tensile power cable for shallow seas. The 0.6/1 kV waterproof tensile power cable comprises a cable core, wherein the cable core is formed by twisting three fan-shaped phase line cores, a circular ground line and a filling water-blocking strip together; a wrapping belt is wrapped outside the cable core, a low-density polyethylene inner sheath is firstly extruded outside the wrapping belt, and then a thick steel wire armoring layer is tightly wound; two wrapping belts are wrapped outside the thick steel wire armoring layer, then a medium-density polyethylene isolation sleeve is extruded, two water-blocking belts are wrapped outside the medium-density polyethylene isolation sleeve in a stacked manner, a corrugated aluminum sheath is welded outside the water-blocking belt, asphalt is coated on the corrugated aluminum sheath, and finally a medium-density polyethylene outer sheath is extruded on the outermost layer of the cable. The 0.6/1 kV waterproof tensile power cable has the characteristics of structure stability, low skin effect, large carrying capacity, good water-blocking performance, corrosion resistance, oxidation resistance and the like, and is widely applied to power transmission between a mainland and an island and between islands as well as power transmission traversing bottoms of rivers, lakes and seas.

Description

technical field [0001] The invention relates to the field of cables, in particular to a waterproof and tensile power cable for 0.6 / 1kV shallow sea. Background technique [0002] There are abundant wind energy resources and vast flat areas on the sea in my country, and it is very close to the power load center, making offshore wind power technology a hot spot in recent research and application. Due to the harsh natural environment of the seabed and its unpredictability, submarine cables for offshore wind power are difficult to design and manufacture. Shallow sea cables not only require special properties such as waterproof, corrosion resistance, mechanical pull resistance and external force collision, but also require high electrical insulation performance and high safety and reliability, especially long-length submarine cables. Capabilities and technical levels present great challenges. Shallow sea cables are widely used in power transmission between continents and islands...

AI Technical Summary

Problems solved by technology

The way of water intrusion is mainly to invade the cable from the cable sheath and the end of the cable, causing oxidation and corrosion of the conductor, thereby affecting the electrical performance of the cable, and even abnormal disconnection accidents; , the insulation layer will produce "water branches", which will accelerate the electrical aging of the cable, cause cable breakdown accidents, and reduce the service life of the cable

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