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Modified polypropylene composite pipe for protecting high-voltage cables

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

Inactive Publication Date: 2014-06-04
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 pipe for protecting high-voltage cables

Examples

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Effect test

Embodiment 1

[0019] Such as figure 1 As shown, the modified polypropylene composite pipe for high-voltage cable protection provided in this embodiment is composed of an intermediate layer 1 and an inner and outer layer 2 as a skeleton, wherein the intermediate layer 1 is a metal layer with a diameter of 0.6 mm and arranged along the warp and weft directions. A cylinder made of wire braiding, the distance between adjacent metal wires is 3 mm, and the inner and outer layers 2 are formed by co-extruding modified polypropylene materials on the inner and outer sides of the above-mentioned middle layer 1; Described modified polypropylene material consists of the following components in parts by weight:

[0020] Modified polypropylene (MPP) resin 80 parts

[0021] Polypropylene / styrene-butadiene-styrene block copolymer (PP / SBS) 8 parts

[0022] Polypropylene (PP) color masterbatch 1 part

[0023] Calcium carbonate 2 parts.

[0024] The preparation method is to co-extrude the above-mentioned m...

Embodiment 2

[0026] Such as figure 1 As shown, the modified polypropylene composite pipe for high-voltage cable protection provided in this embodiment is composed of an intermediate layer 1 and an inner and outer layer 2 as a skeleton, wherein the intermediate layer 1 is a metal layer with a diameter of 1.0 mm and arranged along the warp and weft directions. A cylinder made of silk braiding, the distance between adjacent metal wires is 5mm, and the inner and outer layers 2 are made of modified polypropylene material formed on the inner and outer sides of the above-mentioned middle layer 1 by co-extrusion; Described modified polypropylene material consists of the following components in parts by weight:

[0027] Modified polypropylene (MPP) resin 86 parts

[0028] Polypropylene / styrene-butadiene-styrene block copolymer (PP / SBS) 12 parts

[0029] Polypropylene (PP) color masterbatch 2 parts

[0030] 8 parts of calcium carbonate.

[0031] The preparation method is to co-extrude the above-...

Embodiment 3

[0033] Such as figure 1 As shown, the modified polypropylene composite pipe for high-voltage cable protection provided in this embodiment is composed of an intermediate layer 1 and an inner and outer layer 2 as a skeleton, wherein the intermediate layer 1 is made of metal with a diameter of 0.8 mm and arranged along the warp and weft directions. A cylinder made of braided wire, the distance between adjacent metal wires is 4mm, and the inner and outer layers 2 are formed by co-extruding modified polypropylene materials on the inner and outer sides of the above-mentioned middle layer 1; Described modified polypropylene material consists of the following components in parts by weight:

[0034] Modified polypropylene (MPP) resin 83 parts

[0035] Polypropylene / styrene-butadiene-styrene block copolymer (PP / SBS) 10 parts

[0036] Polypropylene (PP) color masterbatch 1.5 parts

[0037] Calcium carbonate 4 parts.

[0038] The preparation method is to co-extrude the above-mentioned...

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Abstract

Provided is a modified polypropylene composite pipe for protecting high-voltage cables. The modified polypropylene composite pipe is composed of a middle layer, an inner layer and an outer layer. The middle layer is a cylinder formed by weaving of metal wires, and the inner layer and the outer layer are formed by the fact that modified polypropylene composite materials are formed on the inner side face and the outer side face of the middle layer. The modified polypropylene composite materials are composed of, by weight, 80-86 parts of MPP resin, 8-12 parts of PP / SBS, 1-2 parts of PP color masterbatch and 1-8 parts of calcium carbonate. According to the modified polypropylene composite pipe for protecting the high-voltage cables, the modified MPP resin is the main raw materials of the inner layer and the outer layer of the pipe, the PP / SBS is used as MPP resin modified materials, the calcium carbonate is used as an auxiliary, so that the inner layer and the outer layer of the pipe can have enough strength, toughness, good corrosion resistance and good temperature resistance performance, the cylinder which is formed by weaving the metal wires is arranged in the pipe, so that the respective advantages of the metal materials and the modified MPP materials can be fully utilized, accordingly, the physical and mechanical properties of products are improved, and the damage resistance performance of the pipe in the mounting construction and using 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 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 damage to 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, replace the...

Claims

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Application Information

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