Safety self-locking quick joint

Abstract

The invention provides a safety self-locking quick joint which comprises a quick joint sleeve and a union screw, wherein the inner wall of the quick joint sleeve is provided with an inner sleeve; a first spring is sleeved on the inner sleeve; the quick joint sleeve and the inner sleeve move relative to each other along the axial direction; a ball valve is arranged between the quick joint sleeve and the union screw; one end of the ball valve is hermetically connected with the inner sleeve; the other end of the ball valve is hermetically connected with the union screw by virtue of a sealing device; and a self-locking device is arranged in the inner sleeve. The quick joint is provided with the ball valve and the self-locking device, can be used for cutting off and opening the flow of liquid in a pipeline, and is good in sealing effect; the quick joint sleeve is not subjected to moving phenomena; and the safety self-locking quick joint achieves a safety effect, is high in working efficiency and can adapt to quick connection between various pipelines.

Description

technical field [0001] The invention relates to a joint for connection, in particular to a quick joint capable of self-locking between pipelines and valves, and between pipelines. Background technique [0002] A pipeline is a device used to transport gas, liquid and fluid with solid particles connected by pipes, pipe connectors and valves. At present, in various pipeline connections, in order to facilitate the arrangement and installation of pipes, conduit joints are often used to realize steering and connection. The existing joint connection methods include welding type, compression type, threaded type, etc. As the existing joints, the structure is generally simple, and the thread is easy to rust and difficult to disassemble after a long time of use, and the connection between the pipe and the valve is mostly used. Connection, welding connection, if the valve is broken and needs to be replaced, at this time it must be cut open with gas welding at the welding position befor...

AI Technical Summary

Problems solved by technology

[0003] For example, the notification number is CN201527145U, which discloses a quick joint, which includes a first joint, a ball valve and a second joint. The ball valve communicates with the first joint through the second joint, and the ball valve quickly cuts off and opens the liquid in the pipeline. flow, but this kind of quick connector is not stable enough in use and lacks a self-locking device. When using it, it is found that the jacket is still moving back and forth, and the ferrule will pop out with the movement of the jacket, so the safety effect is not achieved.

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