Pipe connecting device

Abstract

The invention provides a pipe connecting device. The pipe connecting device comprises a connecting sleeve and a pressing sleeve which are arranged on a to-be-connected pipe in a sleeving mode, wherein the connecting sleeve and the pressing sleeve form connecting fit for limiting axial separation of the connecting sleeve and the pressing sleeve, an elastic sealing ring is arranged on the portion, at the joint of the pressing sleeve and the connecting sleeve, of the to-be-connected pipe in a sleeving mode, and locking teeth are embedded on the inner ring of the elastic sealing ring at intervals in the circumferential direction. The inner ring of the elastic sealing ring is provided with a complete sealing ring surface, the elastic sealing ring radially deforms when the pressing sleeve and the connecting sleeve are close to each other, and the end, far away from the pressing sleeve, of the connecting sleeve is connected with a pipe connecting piece or a pipe part. According to the scheme, the connecting sleeve and the pressing sleeve get close to each other, so that radial shrinkage of the elastic sealing ring is achieved, locking and fixing are achieved through the locking teeth, the sealing effect is achieved through the complete sealing ring face, and the anti-disengaging capacity and the sealing capacity of the pipe connecting device are guaranteed.

Description

technical field [0001] The invention relates to pipeline maintenance and connection, in particular to a pipeline connection device. Background technique [0002] In the process of pipeline laying or maintenance, it is usually necessary to connect the pipeline. During the connection process, it is generally connected through a flange. For pipelines without flanges at the connection end, welding flanges are generally used, and for pipelines that do not have welding flange conditions, through welding flanges. Pipe connection devices to add flanges or directly connect to pipe components such as tees, valves, and elbows. [0003] The prior art, such as the Chinese patent application number 201821094748.2, discloses a detachment-proof pipe connection device, the technical solution of which is to include a sealing ring, a compression sleeve at one end of the sealing ring, and a connecting sleeve at the other end of the sealing ring; A flange for pipe connection is provided, wherei...

AI Technical Summary

Problems solved by technology

However, the metal teeth and the elastic sealing ring in the above scheme are integrated and the length direction of the metal part is consistent with the radial dimension of the sealing ring. The elastic sealing ring cannot be tightened to fit the outer wall of the pipeline at the part with metal teeth, and the elastic sealing ring cannot form a complete The sealing ring has a good locking and fixing ability, and the sealing effect is poor, and it is prone to water leakage. The elastic sealing ring has less radial constraints and is prone to arching in the middle, which affects the sealing effect. Generally exposed to the outside, it is easy to age and fail

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