Polyethylene water supply pipe for trenchless construction

Abstract

The invention relates to a polyethylene water supply pipe for trenchless construction. The pipe which is formed by blending and extrusion molding of a special high-density polyethylene pipe material and co-polypropylene mixture which are used as base materials, a glass fiber and a proper number of auxiliary agent comprises more than 70 percent of polyethylene, 10-20 percent of co-polypropylene, 5-15 percent of boron and alkali-free (E-CR) glass fiber, an antioxidant, an activating agent and a compatilizer. Compared with the traditional PE100 water supply polyethylene pipe, the polyethylene water supply pipe prepared by the raw materials through methods of high-speed kneading, mixed granulation and extrusion molding has higher ring stiffness and tensile strength, improves the ring stiffness by more than 25 percent and improves the tensile yield strength by more than 30 percent. The pipe disclosed by the invention can be prevented from being flattened or broken during trenchless construction, the dragging and ejecting length of the pipe is greatly reduced, the pipe cost is reduced and the construction cost is also reduced.

Description

technical field [0001] The invention relates to a polyethylene water supply pipe material, in particular to a polyethylene water supply pipe material used in a jacking method and a dragging method for non-excavation construction. Background technique [0002] The pipeline system is the lifeblood of a town, especially the water supply and drainage pipeline network, which directly affects people's daily production and life. With the development of urbanization and the advancement of rural safe drinking water projects, PE water supply pipes are more and more widely used, and most of the pipes are buried underground, especially when crossing roads, buildings, green belts, and rivers. and the original pipe network. In order to avoid the destruction of the original buildings and facilities on the ground, more people choose the trenchless construction technology, which also has higher requirements on the performance of the pipe itself. At present, the PE100 and PE80 water supply ...

AI Technical Summary

Problems solved by technology

At present, the PE100 and PE80 water supply pipes that we generally use, due to the relatively low strength of the polyethylene material itself, are easy to be crushed or broken when using trenchless construction, and the length of drag and jacking is also limited, so In order to avoid the occurrence of the above situation, thick-walled pipes with higher pressure levels are generally selected, but this not only increases the material cost, but also increases the transportation and construction costs accordingly, increasing the overall cost of the project