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Modified polypropylene composite tubular product for protecting high-voltage cable

A technology for high-voltage cables and composite pipes, which is applied to the field of modified polypropylene composite pipes for high-voltage cable protection, can solve the problems of low data accuracy, deep underground drawing of pipes, and low protection performance, and achieves a wide range of applications and good performance. Corrosion resistance and temperature resistance, the effect of improving physical and mechanical properties

Inactive Publication Date: 2014-07-23
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The reason why the pipes are frequently damaged by external forces is that the protective performance of the commonly used pipes made of polypropylene (PP) resin is low, and the pipes are hidden deep underground. Its location can only be verified through some indirect means, so the accuracy of the data is not high

Method used

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  • Modified polypropylene composite tubular product for protecting high-voltage cable
  • Modified polypropylene composite tubular product for protecting high-voltage cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Such as figure 1 , figure 2 As shown, the modified polypropylene composite pipe for high-voltage cable protection provided by this embodiment is composed of an intermediate layer 3 as a skeleton and an inner and outer layer 1, wherein the intermediate layer 3 is made of metal with a diameter of 0.6 mm and arranged along the warp and weft directions. A cylinder made of wire mesh 2 co-extruded with polyethylene material, the distance between adjacent metal wires is 3mm, and the polyethylene material is composed of 90 parts of polyethylene resin, 2 parts of polyethylene color masterbatch and 4 parts of calcium carbonate The inner and outer layers 1 are formed on the inner and outer sides of the above-mentioned intermediate layer 3 by means of co-extrusion of modified polypropylene material;

[0027] Described modified polypropylene material consists of the following components in parts by weight:

[0028] Modified polypropylene resin 81 parts

[0029] 9 parts of polypr...

Embodiment 2

[0034] Such as figure 1 , figure 2 As shown, the modified polypropylene composite pipe for high-voltage cable protection provided by this embodiment is composed of an intermediate layer 3 and an inner and outer layer 1 as a skeleton, wherein the intermediate layer 3 is a metal layer with a diameter of 1.0 mm and arranged along the warp and weft directions. A cylinder made of wire mesh 2 co-extruded with polyethylene material, the distance between adjacent metal wires is 5mm, and the polyethylene material is composed of 95 parts of polyethylene resin, 2 parts of polyethylene color masterbatch and 7 parts of calcium carbonate The inner and outer layers 1 are formed on the inner and outer sides of the above-mentioned intermediate layer 3 by means of co-extrusion of modified polypropylene material;

[0035] Described modified polypropylene material consists of the following components in parts by weight:

[0036] Modified polypropylene resin 85 parts

[0037] 11 parts of polyp...

Embodiment 3

[0042] Such as figure 1 , figure 2 As shown, the modified polypropylene composite pipe for high-voltage cable protection provided by this embodiment is composed of an intermediate layer 3 as a skeleton and an inner and outer layer 1, wherein the intermediate layer 3 is made of metal with a diameter of 0.8mm and arranged along the warp and weft directions. A cylinder made of wire mesh 2 co-extruded with polyethylene material, the distance between adjacent metal wires is 4mm, and the polyethylene material is composed of 93 parts of polyethylene resin, 2 parts of polyethylene color masterbatch and 5 parts of calcium carbonate The inner and outer layers 1 are formed on the inner and outer sides of the above-mentioned intermediate layer 3 by means of co-extrusion of modified polypropylene material;

[0043] Described modified polypropylene material consists of the following components in parts by weight:

[0044] 83 parts of polypropylene resin

[0045] 10 parts of polypropylen...

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Abstract

Provided is a modified polypropylene composite tubular product for protecting a high-voltage cable. The modified polypropylene composite tubular product is composed of a middle layer serving as a framework and inner and outer layers, wherein the middle layer is a cylinder formed by extruding a metal wire woven mesh and a polyethylene material, and the inner and outer layers are formed by extruding a modified polypropylene material on the inner and outer sides of the middle layer. The modified polypropylene composite tubular product has the advantages that modified MPP resin serves as a main material for the inner and outer layers of the tubular product, PP / SBS serves as a modification material for the MPP resin, and calcium carbonate serves as a processing agent. Therefore, the inner and outer layers of the tubular product has enough strength and toughness, good corrosion resistance and temperature-resisting performance, and the cylinder formed by extruding the metal wire woven mesh and the polyethylene material and serving as the framework is arranged in the inside. Accordingly, the respective advantages of a metal material, a polyethylene material and a modified MPP material can be fully utilized, the physical mechanical performance of the product is comprehensively improved, and the damage resistance performance of the tubular product in the construction and usage process is enhanced.

Description

technical field [0001] The invention belongs to the technical field of electric power protection materials, in particular to a modified polypropylene composite pipe for high-voltage cable protection. Background technique [0002] In the power system, the commonly used high-voltage cables are usually buried underground, and the outside is covered with a pull tube as a protective layer. According to the statistical data of transmission cable faults in Tianjin Power Grid in recent years, 70% of the high-voltage cable faults are caused by external force damage, and nearly 80% of the external force faults of high-voltage cables above 110kV are caused by the damage of the pull tube. Once the pull pipe is damaged, it will not only take a long time to repair it, usually about 15 days, which will bring great risks to the operation of the power grid, and the direct economic loss will be very large without calculating the power loss. For example, if the Jinguo 2 110kV cable fails, rep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G9/06C08L23/12C08L53/02C08K3/26C08L23/06
Inventor 李宁张健李治贺春田冬梅宋瑞
Owner STATE GRID CORP OF CHINA
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