Resistance reduction type flame-retardant anti-corrosion cable protection pipe and preparation process thereof

Abstract

The invention discloses a resistance reduction type flame-retardant anti-corrosion cable protection pipe and a preparation process thereof. The cable protection pipe comprises a protection pipe body and a resistance reduction coating coated on the inner wall of the protection pipe body. The protection pipe body comprises modified polypropylene, low-density polyethylene, dicumyl peroxide, p-methylstyrene, 2, 6-di-tert-butyl-4-methylphenol and color master batch. The preparation process includes the steps: stirring the modified polypropylene, the low-density polyethylene and the color master batch at the normal temperature; adding the dicumyl peroxide serving as an initiator, the p-methylstyrene serving as an additive and the 2, 6-di-tert-butyl-4-methylphenol serving as an antioxidant; heating and stirring mixture to obtain premixed materials; extruding and granulating the premixed materials; cutting and expanding the premixed materials; spraying the resistance reduction coating to obtain the cable protection pipe. According to the protection pipe, materials of the cable protection pipe are improved, the inner wall of the protection pipe body is coated with the resistance reduction coating, so that the inner wall of the protection pipe is smooth and free from defect, the protection pipe has excellent heat resistance, flame resistance, corrosion resistance and resistance reductionperformance and is applicable to laying construction of non-excavation cables.

Description

Technical field [0001] The invention relates to the technical field of power cable protection pipes, in particular to a drag reduction type flame-retardant and corrosion-resistant cable protection pipe and a preparation process thereof. Background technique [0002] There are usually three methods for laying cable lines: one is direct buried laying, the other is cable tunnel laying, and the third is laying through pipes. Laying through pipelines, simple construction, low investment, convenient maintenance, can be pre-buried in advance, can avoid the impact of other underground pipelines on the cable itself. The use of cable protection pipes in power grid construction and renovation projects is increasing day by day, but there are many types of cable protection pipes with different performances. The choice of power cable protection pipes is more important. [0003] The main types of cable protection pipes are: organic polymer material cable protection pipes, such as carbon corrugat...

AI Technical Summary

Problems solved by technology

[0005] The research on the cable protection tube made of MPP material in the prior art found that the problems that need to be further solved are as follows: 1. The modified polypropylene adopts polypropylene recycled material, which is recycled, heated, extruded and granulated from the used polypropylene , used as raw materials again, although it meets the relevant environmental protection requirements and greatly reduces the cost, but its elongation at break, toughness, corrosion resistance, and flame retardancy are poor, so that the quality of the finished protective tube cannot be guaranteed; 2. The protective tube The inner wall of the protective tube is required to be smooth and flawless, so that the cable will not be scratched when the cable is threaded. It is simple and convenient during installation and construction, which can shorten the construction period and reduce the installation cost. The inner wall of the protective tube in the prior art is relatively rough, which is prone to scratch the cable. , the drag reduction performance of the inner wall can be increased by adding a lubricant or coating a drag reduction coating

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