Anti-deformation process for hot-melting socket welding of thin-wall plastic pipe

Abstract

The invention discloses an anti-deformation process for hot-melting socket welding of a thin-wall plastic pipe. The anti-deformation process comprises the following step of: step 1: conducting preparatory work; and step 2, hot-melting socket: simultaneously heating and melting the outer surface of the end part of an inner pipe and the inner surface of the end part of an outer pipe by using a heating tool, and mutually inserting the end parts of the inner pipe and the outer pipe after the surfaces are melted, and then a flattening mechanism is pushed to the outside of the outer pipe connectingend to flatten the end of the outer pipe, the fusion end of the inner pipe and the fusion end of the outer pipe can be solidified after 15-20 seconds, and pipeline connection is completed. The invention relates to the technical field of pipeline installation. According to the anti-deformation process for hot-melting socket welding of the thin-wall plastic pipe, a hard lining is arranged to supportthe inner wall of the inner pipe, so that inward collapse of the pipe during hot-melting welding can be avoided, the whole lining is made of a water-soluble material, and the lining can be graduallydispersed by water and dissolved in water during later used. The inner diameter of the inner pipe is not reduced due to the thickness of the inner pipe, the flow speed of water flow is not affected, the supporting effect is good, the lining does not need to be taken out, and using is convenient.

Description

technical field [0001] The invention relates to the technical field of pipe installation, in particular to an anti-deformation process for hot-melt socket welding of thin-walled plastic pipes. Background technique [0002] At present, polyethylene (PE), polypropylene (PP), and polybutene plastic pipes are generally connected by hot-melt socket method, which has the advantages of safety, reliability, and no leakage. However, this method of hot-melt socket welding is not suitable for small-diameter and thin-walled pipes. For example, the pipes used in the PE ground source heat pump system are mostly dn32 and dn25, and their wall thickness is 2.0-3.0mm. Since the pipe wall thickness is relatively thin, the pipe will not be able to maintain rigidity after being heated. It is easy to collapse, resulting in the reduction or blockage of the system diameter at the socket, which will eventually lead to a decrease in the flow rate of the ground source heat pump system, and even resul...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an anti-deformation process for hot-melt socket welding of thin-walled plastic pipes. Using the method of socketing first and then hot-melt welding will cause serious deformation of the outer tube, which will affect the effect of later use

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