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Novel semi-conductive non-water-blocking buffer cushion layer high-voltage power cable

A high-voltage power and buffer layer technology, which is used in the manufacture of power cables with shielding layers/conducting layers, insulated cables, cables/conductors, etc., can solve problems such as buffer layer ablation, and achieve the effect of improving safety.

Pending Publication Date: 2022-04-12
HANGZHOU CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the above-mentioned problem that the buffer layer of high-voltage cables is prone to ablation, and to provide a new type of semi-conductive non-water-blocking buffer layer high-voltage power cable, through which the cable buffer layer can be significantly improved. Eclipse problem

Method used

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  • Novel semi-conductive non-water-blocking buffer cushion layer high-voltage power cable
  • Novel semi-conductive non-water-blocking buffer cushion layer high-voltage power cable
  • Novel semi-conductive non-water-blocking buffer cushion layer high-voltage power cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Example 1: A new type of semi-conductive non-water-blocking cushion layer high-voltage power cable, such as figure 1 As shown, the cable includes a conductor, and the conductor is surrounded by a semi-conductive nylon tape, an ultra-clean XLPE insulation layer, a semi-conductive non-water-blocking buffer tape, a corrugated aluminum sheath, cable pitch, an insulating outer sheath, and a graphite coating. , An ultra-smooth semi-conductive layer is set between the inner layer of the ultra-clean XLPE insulating layer and the wrapped semi-conductive nylon tape, and an ultra-smooth insulating shielding layer is set between the outer layer of the ultra-clean XLPE insulating layer and the semi-conductive non-water-blocking buffer belt.

[0067] The corrugated aluminum sheath is embedded in the semi-conductive non-water-blocking buffer tape, and the negative gap between the corrugated aluminum sheath and the semi-conductive non-water-blocking buffer tape in the 110kV high-voltage...

Embodiment 2

[0073] Example 2: The difference from Example 1 is that a 220kV high-voltage power cable is prepared, and the negative gap between the corrugated aluminum sheath and the semiconductive non-water-blocking buffer zone is 1.0 mm. Regarding the ultra-clean XLPE insulation layer, take 100 parts of linear low-density polyethylene, 40 parts of full-density polyethylene, 3 parts of antioxidant, 1 part of cross-linking agent, and the melt index of low-density polyethylene is between 1.5-1.6 , the melt index of full-density polyethylene is 1.8-2.0, and the twin-screw extruder is fully mixed, dispersed, and homogenized at a temperature of 160°C to obtain a molten material, which is melt-filtered; underwater granulation, and filtered above 50 microns Impurity particles are used to produce ultra-clean premix; the temperature range of melt filtration is 140°C, and high-density filter screen is used to filter impurities above 100 microns; the antioxidant is antioxidant BHT.

Embodiment 3

[0074] Example 3: The difference from Example 1 is that a 220kV high-voltage power cable is prepared, and the negative gap between the corrugated aluminum sheath and the semiconductive non-water-blocking buffer zone is 1.0 mm. Regarding the ultra-clean XLPE insulation layer, take 100 parts of linear low density polyethylene, 30 parts of full density polyethylene, 4 parts of antioxidant, 1 part of crosslinking agent, and the melt index of low density polyethylene is between 1.7-1.8 , the melt index of full-density polyethylene is 1.9-2.0, and the twin-screw extruder is fully mixed, dispersed, and homogenized at a temperature of 160°C to obtain a molten material, which is melt-filtered; underwater granulation, and filtered above 50 microns Impurity particles are used to produce ultra-clean premix; the temperature range of melt filtration is 130°C, and the melt filter uses a high-density filter to filter impurities above 100 microns; the antioxidant is the antioxidant BHT.

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Abstract

The invention relates to the technical field of high-voltage power cables, in particular to a novel semi-conductive non-water-blocking buffer cushion layer high-voltage power cable. Comprising a conductor, a wrapping semi-conductive nylon tape, an ultra-clean XLPE insulating layer, a semi-conductive non-water-blocking buffer tape, a corrugated aluminum sheath, cable asphalt, an insulating outer sheath and a graphite coating are sequentially arranged outside the conductor, and an ultra-smooth semi-conductive layer is arranged between the inner layer of the ultra-clean XLPE insulating layer and the wrapping semi-conductive nylon tape. And an ultra-smooth insulation shielding layer is arranged between the outer layer of the ultra-clean XLPE insulation layer and the semi-conductive non-water-blocking buffer strip. The cable can effectively solve the problem of body breakdown caused by corrosion of white substances generated by water absorption of water-blocking powder in the industry, and improves the use safety and reliability of the high-voltage power cable.

Description

technical field [0001] The invention relates to the technical field of high-voltage power cables, in particular to a novel semi-conductive non-water-blocking cushion layer high-voltage power cable. Background technique [0002] Since entering the 21st century, with the rapid development of my country's economy, the total electricity consumption of the society has been increasing year by year, and my country's power industry has developed rapidly. High-voltage XLPE insulated power cables have been used in my country for nearly 30 years. At first, all imported products were used. So far, 66~500kV power cables have basically been localized. More than 10,000 kilometers of high-voltage cables are buried in Underground, imported products and domestic products have their own characteristics in sheath structure and raw material characteristics. This structure has a certain regionality in the world. XLPE high-voltage cables in other parts of the world generally adopt comprehensive she...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B7/02H01B7/20H01B7/282H01B9/02H01B13/24
Inventor 徐松魏学志杨丽伟
Owner HANGZHOU CABLE
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