Pilot type control valve
A control valve, pilot-operated technology, applied in the field of machinery, can solve the problem that the control valve cannot be applied, and achieve the effects of easy implementation, reduced opening torque, and smooth valve opening.
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[0034] Such as figure 1 and figure 2 As shown, the pilot control valve includes a valve body 1 , a valve core 2 , a valve stem 3 and a handle 4 . The valve core 2 is located in the valve body 1, the inner end of the valve rod 3 is connected with the valve core 2, and the outer end of the valve rod 3 protrudes from the valve body 1 and is connected with the handle 4.
[0035] Such as image 3 and Figure 4 As shown, the spool 2 is cylindrical and sleeved on the valve stem 3. The valve stem 3 has a nut 5 that can abut on the bottom port of the spool 2 and a small spool that can abut on the top port of the spool 2. 6. In this embodiment, a large sealing ring 7 is sheathed on the outer side of the valve core 2 .
[0036] The spool 2 is located between the nut 5 and the small spool 6 and it can move between the two. There is a channel for the fluid medium to pass between the spool 2 and the valve stem 3. The small spool 6 and the top of the spool 2 There is a sealing structu...
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