Low-speed stop valve group
A shut-off valve and valve cavity technology, applied in the direction of lift valve, balance valve, valve device, etc., can solve the problems of emulsion leakage in the liquid supply pipeline, affecting normal work, difficult to screw the shut-off valve, etc., to reduce the labor intensity of operation. , Improve safety and reduce impact
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[0048] refer to figure 1 and image 3 , the difference between this embodiment and the first embodiment is that the control oil circuit 10 is different. Specifically, the control oil circuit 10 includes a two-position three-way solenoid valve 13 coupled with a central controller (not shown in the figure). One of the ports of the solenoid valve 13 is communicated with the liquid inlet 3, and the other port on the same side of the two-position three-way solenoid valve 13 is provided with a pressure relief port 14, and the pressure relief port 14 can lead to the emulsion tank 17. The interface on the opposite side of the three-way solenoid valve 13 is communicated with the control liquid port 9; the central controller is connected to the central console for man-machine interaction for communication. It is realized by the way of optical fiber ring network transmission communication.
[0049] In addition, three centralized control stations are provided in the central pumping stat...
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