High-performance leakage-proof flexible joint

Abstract

The invention discloses a high-performance leakage-proof flexible joint. The internal-pressure, external-pressure and negative-pressure inspections can be singly performed on connected joints after connection. The joint leakage is caused by such factors as aging of rubber rings, nonuniform settlement of a foundation or bearing of radial loads in the pipe work; and sealing rubber rings are axiallyshifted into an inclined surface with a lift angle under the pressure effect of conveying mediums to increase radial pressure, so that the contact pressure of sealing contact surfaces is higher than the pressure of the mediums to automatically stop continuous leakage of the joints.

Description

technical field [0001] The patent of the present invention relates to a pipe, especially the interface of large, medium and extra large conveying medium pipes. Background technique [0002] The pipes that convey the medium can work normally only by reliable connections, and the flexible interface connection of the apron is the most commonly used connection method. [0003] Currently known flexible joints for pipes include single rubber rings and double rubber rings. Although the flexible interface with double aprons solves the problem that the single apron cannot test the pressure of the interface alone, it has the disadvantages of complex interface structure and high interface processing cost. At the same time, although the flexible interface pipes currently used can adapt to a certain range of pipeline swing angles and axial displacements, when the sealing rubber ring ages and the sealing compression ratio is reduced, or when the pipeline foundation has a large uneven set...

AI Technical Summary

Problems solved by technology

Although the flexible interface with double rubber rings solves the problem that the single rubber ring cannot test the pressure of the joint alone, it has the disadvantages of complex structure of the joint and high cost of joint processing

At the same time, although the flexible interface pipes currently used can adapt to a certain range of pipeline swing angles and axial displacements, when the sealing rubber ring ages and the sealing compression ratio is reduced, or when the pipeline foundation has a large uneven settlement, large gap, or when there is a large axial displacement of the pipe under the action of thermal expansion and contraction, interface leakage will occur

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