Self-sealing instrument pipe fitting

Abstract

The invention relates to a self-sealing instrument pipe fitting. The self-sealing instrument pipe fitting comprises an outer cylinder, the two ends of the outer cylinder are connected with a pipelinerespectively, the pipeline is inserted into the outer cylinder, a circle of abutting plate is arranged in the middle of the interior of the outer cylinder, and a sealing device is arranged on the inner wall, making contact with the pipeline, of the outer cylinder. The sealing device comprises a plurality of air bag films, a pressurizing device and a rubber sealing belt, the pressurizing device isused for inflating and deflating the air bag films, the air bag films are fixed to the inner wall of the outer cylinder, the rubber sealing belt is connected with the outer side faces of the air bag films, and every two adjacent air bag films are separated through a partition plate. The two ends of the outer cylinder are provided with non-closed sealing anti-disengaging rings, the two ends of thesealing anti-disengaging rings are connected through protruding connecting tables, and screw holes and tightening nuts are arranged on the connecting tables. Double sealing is conducted through the sealing device and the sealing anti-disengaging rings, operation is easy, and the sealing effect is good.

Description

Technical field [0001] The invention relates to the technical field of instrument pipe fittings, in particular to a self-sealing instrument pipe fitting. Background technique [0002] Instrument pipe fittings are used in pipeline connection or control systems. They are used to change the direction of pipelines, pipe branches or pipe connections of different sizes. Because instrument fittings can connect two or more pipes, instrument fittings need to have High tightness, to ensure that there will be no leakage at the pipe connection, the inner diameter of the pipe connection changes, and the pressure will also change. However, the existing instrument pipe fittings have limited sealing ability and cannot change the sealing strength according to the pressure. The connection with the pipeline is not tight and is easy to disconnect, making its strength insufficient, and the sealing performance of the instrument pipe fittings and the pipeline is poor and easy to leak. Summary of the i...

AI Technical Summary

Problems solved by technology

[0002] Instrument fittings are used in the connection or control system of pipelines. They are used for changing the direction of pipelines, branching pipes or connecting pipes of different sizes. Because instrument fittings can connect two or more pipes, instrument fittings need to have High sealing performance to ensure that there will be no leakage at the pipe connection, the inner diameter of the pipe connection will change, and the pressure will also change. However, the sealing ability of the existing instrument fittings is limited, and the sealing strength cannot be changed according to the pressure. Instrument fittings The connection with the pipeline is not tight, and it is easy to disconnect, making it insufficient in strength, and the tightness between the instrument fittings and the pipeline is poor, and it is easy to leak

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