A self-tightening pipeline connection structure

Abstract

The invention discloses a self-tightening pipeline connection structure, which includes a pipe joint, a pipe joint, and a lock nut used to connect the pipe joint and the pipe joint; one end of the pipe joint is located in the pipe joint, and one end of the pipe joint passes through the The sealing part is sealed and connected with the pipe joint, and the pipe joint communicates with the pipe joint through the sealing part; one end of the lock nut is sleeved on the pipe joint, and the other end of the lock nut is connected with the pipe joint, and a detection device is arranged inside the lock nut. The leak part, the leak detection part communicates with the sealing part. The present invention can realize that by setting two sealing structures, the sealing performance of the pipeline connection structure is gradually improved in the initial state and the working state, so that the pipeline connection structure can be used in the case of high-pressure dangerous media, and at the same time, a leak detection hole is provided, It can directly detect the leakage of the connection structure, the detection process is simple, the result is intuitive, and the leak detection efficiency can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of pipeline connection, in particular to a self-tightening pipeline connection structure. Background technique [0002] The pipeline connection structure is widely used in the pipeline system of aerospace products in active service, which mainly includes ball joints, conical nozzles and outer nuts. Wherein, the two ends of the spherical joint and the conical nozzle which are far away from each other are respectively connected to a pipeline, the outer wall surface of the spherical joint end is sheathed on the outer wall surface, and the inner wall surface of the outer jacket nut and the outer wall surface of the tapered nozzle are threaded structures. During the pipeline connection process, the spherical part of the ball joint is first inserted into the inner cone part of the conical nozzle, and then a tightening torque is applied on the outer nut, so that the inner thread of the outer nut is screwed into the...

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned pipeline connection structure is affected by the medium separation force and other external loads during the working process. It is difficult for the sealing ring at the contact part between the spherical surface of the spherical joint and the inner conical surface of the conical nozzle to maintain sealing, and it is easy to be damaged under high pressure. cause media leakage

Only relying on increasing the pre-tightening force to ensure the sealing of the sealing ring at the contact part will cause local yield damage to the spherical surface of the spherical joint and the inner cone surface of the conical nozzle, which will affect the sealing reliability

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