Mold for producing GRE winding pipe

Abstract

The invention relates to a mold for producing GRE winding pipe, and belongs to the technical field of pipeline production. The mold comprises an outer pipe, an inner container, end covers, a controller and heaters. The outer diameter of the end cover is not larger than that of the outer pipe, the end covers are arranged at the two ends of the outer pipe and the two ends of the inner container, and a sealed cavity is formed between the inner wall of the outer pipe and the outer wall of the inner container. The heaters are arranged in the sealed cavity, and the controller is fixed in the inner container and connected with the heaters. An oil discharge outlet communicating with the sealed cavity is formed in the lower side of one end of the sealed cavity, and an oil inlet communicating with the sealed cavity is formed in the upper side of the other end of the sealed cavity. The outer diameter of the outer pipe of the involved mold can be increased to 1,000 mm to 2,200 mm, and heating efficiency and heating uniformity required by curing can be guaranteed; and the GRE winding pipe with the inner diameter ranging from 1,000 mm to 2,200 mm is produced, and the dimension range of the GRE winding pipe meets the needs for a high-pressure high-convey-capacity pipeline in current construction.

Description

technical field [0001] The invention relates to the technical field of pipe production, in particular to a mold for the production of GRE winding pipes suitable for the production of large-diameter GRE pipes. Background technique [0002] Glass fiber reinforced epoxy resin tube (English name is Glass Reinforced Epoxy tube, referred to as GRE tube) is made by continuous winding production method, so it is also called GRE winding tube. GRE material consists of two parts: matrix and reinforcement. The matrix of the GRE material is resin, which acts as a bond, accounting for 30% to 40% of the total volume. Resin is a thermosetting plastic, including epoxy, phenolic resin, etc., and resin is also an organic non-metallic material. The reinforcement of the GRE material is glass fiber, which acts as a reinforcement. Glass fiber is a kind of inorganic non-metallic man-made inorganic fiber, such as glass fiber, carbon fiber, Kevlar fiber B, etc., which roughly accounts for 60% to 7...

AI Technical Summary

Problems solved by technology

[0006] In the current construction process, if pipes with larger diameters are required, on the one hand, pipes of other materials can be used instead. As mentioned above, pipes of other materials are not as good as GRE coiled pipes in many aspects; The production method of the pipe, but often the quality of the GRE pipe obtained will be reduced, and the cost of production will increase significantly

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