Valve hydraulic hand wheel
A hydraulic and valve technology, which is applied in the field of valve opening devices, can solve the problems of cumbersome, poor stress, and small installation space, and achieve the effects of broad market prospects, convenient operation, and simple structure
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[0054] As a preferred embodiment of the present invention, the valve body 11 is provided with a vent hole 13, and the vent hole 13 is arranged at the joint between the valve body 11 and the housing 10; the vent hole 13 communicates with the driven valve stem piston 9 The area between the valve body 11 and the external environment. The main function of the vent hole 13 of the present invention is to prevent the lower end of the driven valve rod piston 9 from holding pressure, causing difficulty in closing. At the same time, when the valve is opened, the atmospheric pressure can be used to lift the valve rod. It is not very sealed to be connected with the valve body, and the same effect can also be achieved.
[0055] It should be understood by those skilled in the art that the present invention has the following three usage states:
[0056] 1. When the valve needs to be closed quickly at the initial stage of closing, A>A2;
[0057] 2. When the valve needs to be closed synchron...
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