A full-bridge pilot control on-off valve
A pilot control, full-bridge technology, applied in valve details, valve devices, valve operation/release devices, etc., can solve problems such as the inability to overcome the hydraulic force to push the valve core, increase the volume of the switch valve, and increase the complexity. Achieve the effects of improving the ability to resist external disturbances, reducing the size of the specifications, and reducing the control power
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Embodiment 1
[0032] Such as figure 1 As shown, a full-bridge pilot control switching valve includes a valve body 1 and a main valve core 2. The valve body 1 is provided with a high-pressure oil inlet 101, a first control oil port 102, and a second control oil port 103. , Two low-pressure oil outlets 104 (can be 0 pressure), two low-pressure oil outlets 104 are arranged on both sides, high-pressure oil inlet 101 is arranged in the middle, the first control oil port 102, the second control oil port 103 respectively Set between the two low-pressure oil outlets 104 and the high-pressure oil inlet 101, such as figure 2As shown, the main valve core 2 is provided with a first protruding ring 206, a second protruding ring 207, a third protruding ring 208, and a fourth protruding ring 209 in the circumferential direction, and the first protruding ring 206 and the fourth protruding ring 209 are respectively located at The two ends of the main spool 2 are in dynamic sealing cooperation with the val...
Embodiment 2
[0044] Such as Figure 5 As shown, a full-bridge pilot control on-off valve includes a valve body 1 and a main valve core 2. The valve body 1 is provided with a high-pressure oil inlet 101, a first control oil port 102, and a second control oil port 103. , Two low-pressure oil outlets 104 (can be 0 pressure), two low-pressure oil outlets 104 are arranged on both sides, high-pressure oil inlet 101 is arranged in the middle, the first control oil port 102, the second control oil port 103 respectively Set between the two low-pressure oil outlets 104 and the high-pressure oil inlet 101, the main valve core 2 is provided with a first protruding ring 206, a second protruding ring 207, a third protruding ring 208, and a fourth protruding ring 209 in the circumferential direction. The first protruding ring 206 and the fourth protruding ring 209 are respectively located at both ends of the main valve core 2 and are in dynamic sealing cooperation with the valve body 1 (the seal can be i...
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