Expansion compensation connecting pipe fitting

Abstract

The invention discloses an expansion compensation connecting pipe fitting. The expansion compensation connecting pipe fitting has the characteristics that a connecting pipe can be subjected to tight coupling by the pipe fitting; expansion displacement can be achieved in the pipe fitting by the connecting pipe; a combined stress formed by a pipeline connected with the pipe fitting in any severe working condition environment is less than an allowable stress of a pipe material all the time; and the problem that the use safety and the reliability of the existing pipeline are poor is effectively solved.

Description

technical field [0001] The patent of the invention relates to a pipe connecting pipe fitting, which is especially suitable for pipelines with harsh working conditions. Background technique [0002] Pipeline transportation is the simplest transportation mode for medium transportation. Pipes must be connected by pipe fittings to become pipes. The reliability of pipe connection determines the safety and reliability of pipeline use. Therefore, it is necessary to develop pipe fittings with better connection performance to improve pipeline quality. [0003] At present, the stress of the pipe wall of the building water supply pipe is calculated according to the working pressure, and the safety factor of the pipe wall strength is very high. The damage of the pipeline, so the pipeline should be equipped with telescopic compensation pipe fittings to reduce the incidence of pipeline accidents. However, due to the relatively expensive telescopic compensation pipe fittings used at prese...

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Problems solved by technology

[0004] The purpose of the patent of the present invention is to provide a method to achieve a tight seal on the connecting pipe, which can not only eliminate or reduce the impact pressure of the pipe's water hammer through the outward displacement of the pipe in the pipe fitting, but also increase the volume of the pipe. The telescopic displacement of the pipe in the pipe fittings is used to compensate the change in the length of the pipe caused by thermal expansion and contraction of the pipe, avoiding the concentration of tensile stress in the pipe, causing the pipe to undergo water hammer impact, encounter a greater working temperature difference and withstand external forces. The combined stress formed is lower than that of the pipe material A pipe fitting with a novel connection function, which effectively solves the problem of poor safety and reliability of pipes connected by traditional pipe fittings

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