Multiunit tube joint and method for processing same

Abstract

The invention relates to a composite pipe joint and a processing method thereof. The pipe joint comprises a glued part for fixing the end faces of two composite pipes with the same diameter together and a pipe sleeve with two ends respectively installed in the end regions of the two composite pipes. , and an elastomer layer disposed between the outer surface of the composite pipe and the inner surface of the sleeve. During processing, the pipe sleeve is first fixed, then the end surface of the composite pipe is glued, and then the pipe sleeve is welded, and the liquid elastic body is injected between the outer surface of the composite pipe and the inner surface of the pipe sleeve through the gap reserved when welding the pipe sleeve. A step of. The composite pipe joint made by the method of the present invention includes two fixed parts of bonding between pipe fittings and pipe socket welding, so that the pipe joint will not be damaged under the action of external forces such as the fluctuation of the earth's crust, and is very suitable for connecting large-caliber pipe fittings.

Description

Technical field: [0001] The invention relates to a composite pipe joint and a processing method thereof. Background technique: [0002] Once a leak occurs in a pipeline buried in the ground for conveying fluid, it is very difficult and expensive to repair. The main reason for pipeline leakage is the damage caused by the corrosion of the transported fluid or the fluctuation of the earth's crust. Among them, the leakage of the pipeline due to fluid corrosion will involve the overall pipeline including the pipe joint, so The parts where the crustal fluctuations cause leakage of the pipeline are mainly concentrated in the pipe joints, so the quality of the pipe joints will directly affect the service life of the pipeline for conveying fluid. [0003] The technology of using composite pipes to solve the corrosion of pipelines by fluids has been known to the public. The composite pipe is usually made of a metal material, and the inner surface of the pipe body is coated with a la...

AI Technical Summary

Problems solved by technology

Although the pipe joint is provided with a heat insulating layer and an anti-corrosion layer between the socket part and the socket part, it can protect the inner plastic layer of the pipe fitting from being damaged to a certain extent during welding, but for large-diameter pipe fittings, it is necessary to The butt joint between the two can only be completed by hoisting equipment and special tools. If the heat insulation layer and anti-corrosion layer are installed, the butt joint will be more difficult; at the same time, the connection between the two pipe fittings is only achieved by pipe joint ring seam welding. This connection method is not strong, especially for pipelines buried in the ground, when they are subjected to external forces such as crustal fluctuations, they are easily broken; in addition, the sealing of the pipe joint is completed by the rubber gasket set in the socket. The rubber gasket of this structure must be in direct contact with the fluid conveyed by the pipeline. If the pipeline conveys corrosive fluid, the rubber gasket will not be able to seal after being corroded, resulting in pipeline leakage.

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