Anti-corrosion, anti-stretching, and direct burial water-blocking medium-voltage cable

Abstract

The invention provides an anti-corrosion, anti-stretching, and direct burial water-blocking medium-voltage cable. The cable comprises a semi-conductive graphite coating layer, an HDPE outer sheath layer, an aluminum alloy wire armored layer, an MDPE isolation sleeve, a multi-layer shielding protection structure, a conductor insulating water-blocking layer and a cable connecting and fixing band structure; the outer side of the HDPE outer sheath layer is coated with the semi-conductive graphite coating layer; the HDPE outer sheath layer is arranged on the outer side of the aluminum alloy wire armored layer in an extrusion manner; the aluminum alloy wire armored layer is wound around the outer side of the multi-layer shielding protection structure; and the multi-layer shielding protection structure is arranged on the outer side of the conductor insulating water-blocking layer in an extrusion or coating manner. By adding a water-blocking material in the conductive wire core and by adoptingthe lead alloy sheath, the cable has the longitudinal water blocking and radial sealing and dampproof anti-corrosion effects; and through the metal armored material and by adopting the aluminum alloywires, the tensile property and tensile strength of the cable are ensured, and thermal runaway fault caused by heating due to eddy current loss can be effectively eliminated.

Description

technical field [0001] The invention belongs to the technical field of cables, in particular to a corrosion-resistant, stretch-resistant, direct-buried water-blocking high-pressure cable. Background technique [0002] After the end of the civil war in Sri Lanka, there was a lot of waste waiting to be done. In the country's economic construction, there was a huge demand for cables. Sri Lanka has a tropical monsoon climate, with concentrated precipitation throughout the year. Considering the special climate environment and laying conditions of Sri Lanka, it is more susceptible to erosion and damage from rainwater and external machinery. Cables laid directly underground need to have good watertightness and mechanical strength , so structurally, direct buried power cables need to have the properties of corrosion resistance, sealing and high mechanical strength. Therefore, based on the actual needs of customers, we have developed a corrosion-resistant, tensile-resistant, direct-...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the present invention provides a corrosion-resistant, stretch-resistant, direct-buried water-blocking high-pressure cable to solve the problem that the existing cables are easy to corrode and resist corrosion, the tensile strength of the cable is low, and it is easy to be damaged after direct burial. Problems with water and inconvenient fixation when cables get tangled

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