The liquid-controlled one-way valve is a valve that relies on the control fluid pressure to reverse the one-way valve. This valve has a more important position in the hydraulic support equipment of coal mine machinery. The liquid-controlled one-way valve is different from the normal one-way valve, and when the control oil passage does not turn on the pressure oil, the liquid-controlled single-direction valve is as follows like a normal one-way valve, and the pressure oil is only From the oil exit to the outlet, it cannot flow in reverse. When the control oil path has a control pressure input, the piston rod moves to the right under the action of pressure oil, open the one-way valve with the top rod, so that the entrance oil port is turned on. If the oil port is greater than the oil port, the oil can be reverse flow.

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