JPS63275866A - Automatic fluid pressure feed control valve - Google Patents

Abstract

PURPOSE:To apply constant pressure safey onto a subject by carrying out constant pressure control, abrupt abnormally high pressure control and counter flow prevention control automatically through a single valve. CONSTITUTION:When fluid is pressure fed through a feed-in port 6, a valve 3 moves upto a position shown by a line 4 through function of a setting spring 16. The fluid is pressure fed through a blow-out port 1 and applies constant pressure onto a subject. When fluid having abnormally high pressure is fed abruptly, the valve 3 advances to a feed-in valve seat 2 and closes. At the same time, a sliding shaft 12 secured to a shaft 7 is pushed to open a valve 8 so as to discharge the fluid having abnormally high pressure through a fluid lead-in/discharge port 10. Even if fluid is sucked abruptly, the valve 3 closes a valve seat 5 through suction force thus preventing counter/flow.

Description

[Detailed description of the invention] (1) First effect (see Figure 2) Quantitative pressure feeding control mechanism.

When fiik is pumped through the inlet of 6, the 3° valve is 15. Due to the action of the setting spring, the fluid will only advance to the position of the line 4. Therefore, the fluid will move to the position 1.
The liquid is fed under pressure from the outlet and is applied to the target object at a constant pressure.

(2) Second effect (see Figure 3) Sudden high pressure control 31 machine side 1 When abnormally high pressure fluid is suddenly pumped from 6, 3.7
By adjusting the stroke of 14, which is fixedly connected to its shaft 7, the valve 2 advances to the inlet valve seat 2 and intersects.
12 slide shaft is pushed, 8. Since the valve 10 opens, the abnormal pressure is discharged from the fluid inlet/discharge hole 10. Therefore, for objects that dislike abnormal pressure, i>W will not hold.

(3) Third effect (see No. -1r13) Backflow prevention control mechanism, 6. If the fluid being pumped suddenly becomes suction in reverse, 3. Since the valve 5 uses suction force to open the valve seat 5, the target material will not flow backwards.

At the same time, valve 8 is queried by its suction pressure, so 10. Since outside air flows in from the fluid inlet/exhaust hole,
6. There is no problem with backflow from.

・1.1! e* explanation of the surface.

1st V, Mechanism diagram of fluid pressure automatic i control valve, 1, Air outlet,
2. Inlet first valve seat, 3. first valve, 4. Valve movement center line, 5. Discharge first valve seat, 6. Fluid inlet.

7. Connecting shaft 28. 2nd valve, 9. 2nd valve seat, 10, ff1
Body introduction/exhaust hole, 11. Slide shaft, 12o second pressure setting spring, 13, second valve pressure setting adjustment screw, 14, stroke adjustment, 15, second valve opening screw, 16, first valve pressure setting spring, 17, first valve Pressure setting adjustment screw, 18, bearing, or more

Claims (1)

[Claims] (1) In order for fluid to be pumped and cause an effect on the target object, it must be maintained at a constant pressure.
Due to the action of the machine that pumps it, the pressure may suddenly become high, so a mechanism to control this high pressure is required. Also, it may suddenly turn into a reverse flow condition. So, as described below, by one valve, 3
He invented an automatic valve mechanism with two control mechanisms. First, constant pressure control; second, sudden abnormal high pressure control; and third, backflow prevention control. The above three functions are automatically controlled and adjusted with one valve. did,
A special valve is claimed.