A universal connecting pipe fitting

Abstract

When a universal joint pipe fitting is used for the fixed connection of the pipe, the pull-out force of its interface is greater than the allowable tensile force of the pipe: when it is used for an active connection, it can be eliminated by the axial displacement of the pipe in the pipe fitting The working temperature difference stress of the pipeline; when it is used for the buried connection of the pipeline, the tolerance of the bump size of the buried pipe can be larger; when it is used for the general connection, its interface can withstand the tension generated by the pipeline when the working temperature difference is 35°C Stretch, and because it can be disassembled, it is very convenient to use. Since the general, fixed and buried connection of the pipeline can be completed by using a common wrench, the application and installation are very convenient. The sealing effect of this kind of pipe fittings is very good when connecting pipes of any specification pipe diameter, pipe wall thickness and any harsh working environment, which effectively solves the problems of troublesome installation and poor connection effect of traditional pipes at present, and is especially suitable for thin-walled metals Tubes and important plumbing uses.

Description

technical field [0001] The patent of the present invention relates to a pipe, especially a pipe for indoor water and gas transportation. Background technique [0002] Tap water and gas must be transported through pipelines to be supplied to users, and pipes must be connected to be installed into pipelines. The reliability of pipe connections determines the safe operation of pipelines. [0003] Currently known pipeline connections have threaded interface connections (see image 3 ), press-type interface connection (see Figure 4 ) and welded connections (see Figure 5 ). Although the threaded interface connection can be disassembled, the threaded interface of the pipe port is formed by mechanical cutting, so it is not only troublesome to process the thread during installation, but also the anti-corrosion layer on the surface of the pipe 14 will be damaged and thinned due to the processing of the external thread 13 The effective thickness of the pipe, while processing the t...

AI Technical Summary

Problems solved by technology

[0005] The connection principle of the universal connection pipe fittings of the present invention is to use the O-shaped sealing rubber ring that enters the sealing cavity in the form of rolling, and rely on the free rebound of the real rubber of the rubber ring under radial pressure to seal the pipe, which solves the problem of the clamping interface. The connected sealing rubber ring will accelerate the aging of the rubber ring due to excessive pressure, lose its elasticity, and be prone to leakage problems

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