Vacuum valve with locking function

Abstract

The invention relates to the technical field of vacuum valves, in particular to a vacuum valve with a locking function. The vacuum valve is used for solving the problem that in the prior art, a vacuumvalve does not have a self-locking function, so that valve port fluid leakage or system pressure change is possibly caused. The vacuum valve comprises a valve body and a driving mechanism, wherein the driving mechanism is connected with a connecting rod assembly, the connecting rod assembly is connected with a supporting plate through a lower rotating shaft, the supporting plate is connected witha valve element assembly capable of sealing a valve port through a cam, the connecting rod assembly is further provided with a limiting piece capable of making contact with the supporting plate, andthe connecting rod assembly can extend to form a straight line. According to the vacuum valve, when a closing plate closes the valve port, the limiting piece makes contact with the supporting plate, the connecting rod assembly cannot continue to move, at the moment, the connecting rod assembly is located on the same straight line, the reactive force of the supporting plate has no moment in the rotating direction of the connecting rod assembly, the connecting rod assembly cannot swing reversely, and therefore the vacuum valve has the self-locking function, and valve port fluid leakage or systempressure change is prevented.

Description

technical field [0001] The present invention relates to the technical field of vacuum valves, in particular to a vacuum gate valve, and more specifically to a vacuum valve with a locking function. Background technique [0002] Vacuum valve refers to the component used to adjust the air flow, cut off or connect the pipeline in the vacuum system. Among them, there is only one valve plate in the valve body, which is called single valve plate vacuum valve. [0003] The single valve plate vacuum valve in the prior art includes a valve body and a valve port opened on the valve body. A valve core is installed in the valve body, and the valve core is often pushed to the valve port by a cylinder shaft or a hinge mechanism, and then the top is deflected by a cam. Tightly seal the valve port, at this time, the fluid cannot pass through the vacuum pipeline; or drive the valve core away from the valve port through the cylinder shaft or hinge mechanism, at this time, the fluid can pass th...

AI Technical Summary

Problems solved by technology

[0005] Based on the above problems, the object of the present invention is to provide a vacuum valve with a locking function, which is used to solve the problem that the vacuum valve in the prior art does not have a self-locking function, which may cause fluid leakage at the valve port or system pressure changes

Images