Winding method for integral-type large-aperture polyolefin-wound solid-wall inspection well

Abstract

The invention relates to an integral-type large-aperture polyolefin-wound solid-wall inspection well and a winding method thereof. The objective of the invention is to solve problems that no large-scale injection molding equipment is available for large-aperture plastic inspection wells at present, and injection molding products have unstable dimensions, easy generation of cavities and high cost, and to solve problems comprising complex technologies by adopting extrusion pipe welding, long molding time, difficulty in welding and severe waste of materials. A winding process is a continuous thermo fusion welding process, wherein fused strips are extruded from two flat extrusion die orifices at the same time, and are wound on the surface of a reducing steel core mold sequentially; the later wound fused strip is pressed on gaps of the earlier wound fused strip; and pressure welding is performed. The inspection well prepared by the winding method is large in overall structural strength and simple in operation, and has no deformation defects. The winding method is suitable for one-time molding of drainage pipelines of all kinds of specifications and dimensions, thus achieving an objective of a complete range of specifications.

Description

technical field [0001] The invention relates to the technical field of municipal engineering pipe manufacturing, in particular to a winding method for an integral large-diameter polyolefin winding solid-wall inspection well. Background technique [0002] The inspection well is the confluence hub used to connect the buried drainage pipes and the urban underground pipe network within the scope of the building. It is convenient for regular inspection, cleaning and dredging or inspection for downhole operation, and it is a workstation to prevent pipeline blockage. There are well-shaped structures made of plastic injection molding or bricks. Among them, the plastic inspection well can be divided into injection molding method, winding method and coating method according to the molding method. The injection molding method relies on a special mold to form each part at one time through high-pressure or low-pressure injection on a large-scale injection molding machine. The disadvant...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that there is no large-scale injection molding equipment available for large-caliber plastic inspection wells, the size of injection molding products is unstable, cavities are easily generated, and the cost is high, and the welding process of extruded pipes is complicated, and the molding time is long. To solve the problems of difficult welding and serious material waste, provide a winding method for large-diameter polyolefin winding solid wall inspection wells with reasonable process design and welded into a whole by online hot-melt butt welding

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