High-bonding-strength plastic-lined compound pipeline and technical method

Abstract

The invention relates to the technical field of plastic-lined compound pipelines and provides a high-bonding-strength plastic-lined compound pipeline and a technical method. The compound pipeline is athree-way pipeline, the compound pipeline comprises a pipeline main body, a lining plastic body and a pipeline material, the lining plastic body is mounted in the pipeline main body, the pipeline material is clamped between the pipeline main body and the lining plastic body, grooves are arranged in the inner side surface, in contact with the lining plastic body, of the pipeline main body, and theinner side surface is coated with a hot melt glue layer except the groove positions. According to the high-bonding-strength plastic-lined compound pipeline provided by the invention, lining plastic fixing and tightening force is increased by arranging the grooves in the inner side surface in contact with the lining plastic body of the pipeline main body and coating the inner side surface with thehot melt glue layer except the groove positions; and to be specific, chamfered grooves are arranged in the pipeline main body, so that bonding fixing firmness between plastic injected in the productand the surface of the main body is increased, and pulling force is enhanced.

Description

technical field [0001] The invention relates to the technical field of production of plastic-lined composite pipe fittings, and provides a high-bonding-strength plastic-lined composite pipe fitting and a process method. Background technique [0002] As a new type of metal and new type of plastic pipe, steel-plastic composite pipe is a new type of composite pipe that circulates in the construction market at the same time. Because it combines the advantages of metal pipes and plastic pipes and abandons the shortcomings of both, it is favored by the engineering community. . This kind of pipeline gradually developed to the large cities with developed domestic economy. Since the country issued a document in June 2000 to phase out galvanized steel pipes in urban water supply pipes, the application of steel-plastic composite pipes has been rapidly promoted. Therefore, the matching plastic-lined pipe fittings for steel-plastic composite pipes also increase. As an important fitting...

AI Technical Summary

Problems solved by technology

Invention patent CN 10345328B discloses a plastic-lined composite pipe fitting and its manufacturing process, but the internal surface treatment and cleaning of the product in the early stage are not comprehensive in the process, which makes the subsequent production process prone to poor adhesion of the plastic lining inside the pipe fitting body

In the process of production or construction, it is found that the inner plastic layer of plastic-lined pipe fittings is prone to loosening and the phenomenon of glue opening at the joint of steel and plastic

When the plastic-lined pipe fittings are connected with the steel-plastic composite pipe, the connection is not tight enough to cause water leakage at the connection or internal leakage, resulting in pipe corrosion and leakage

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