A heat-resistant insulating MPP power cable tube and its preparation method

Abstract

The invention discloses a heat-resistant insulating MPP power cable pipe and a preparation method thereof, which relate to the technical field of cable pipe processing and include an inner pipe, the outer surface of the inner pipe is covered with an insulating net, and the inner wall of the inner pipe is coated with lubricating One side of the insulation net is provided with a storage tank, and one end of the insulation net is fixedly connected with a wire, and the outer side of the inner pipeline and the storage tank is provided with an MPP outer pipeline, and the MPP outer pipeline includes the following raw materials by weight: 60-80 parts of isotactic polypropylene resin, 5-10 parts of block copolymerized polypropylene, 3-5 parts of olefin block copolymerized elastomer OBC, 0.5-2 parts of heat-resistant insulating orange masterbatch, 10 parts of ultra-high molecular weight polyethylene resin ‑20 servings. In the present invention, the outermost MPP outer pipeline has stronger heat resistance and external pressure resistance, and the innermost inner pipeline has stronger high temperature resistance and good flame resistance, which can prevent fire from spreading when a fire occurs.

Description

technical field [0001] The invention relates to the technical field of cable tube processing, in particular to a heat-resistant insulating MPP power cable tube and a preparation method thereof. Background technique [0002] MPP pipe, also known as MPP power cable protection pipe, is divided into excavation type and non-excavation type. MPP non-excavation pipe is also called MPP jacking pipe or drag pipe. MPP pipe uses modified polypropylene as the main raw material and has high temperature resistance. , The characteristics of external pressure resistance, suitable for medium and low voltage transmission line cables below 10KV. Compared with the traditional "grooving and buried pipe method", the non-excavation power pipe project is more suitable for the current environmental protection requirements. The length of the MPP pipe Most of them are 6m-14m. [0003] A Chinese patent discloses a rose crystal nano-calcium carbonate multi-dimensional reinforced MPP cable protection tu...

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Problems solved by technology

[0005] In order to overcome the above-mentioned existing MPP cable protection tubes, most of them are made of single-layer material, resulting in various performances of the tubes being limited by thickness and materials. At the same time, when in use, most cable protection tubes are buried underground, which is inconvenient after the cable catches fire. Fire extinguishing, so there is a certain demand for the heat resistance and flame resistance of the pipe. At the same time, when in use, it is necessary to prevent a large amount of static electricity from accumulating inside the pipe, causing damage to the pipe or cable, or even a fire. The technical problem of the present invention The purpose is to provide a heat-resistant insulation MPP power cable tube and its preparation method

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