Superposition type hydraulic control one-way pneumatic valve

type hydraulic control one-way pneumatic valve is superposition structure of hydraulic control one-way pneumatic valve, can reliably by the pneumatic valve and actuator between hydraulic circuit, can make the one-way pneumatic valve pneumatic valve reverse circulation. As the hydraulic support in coal mine machinery equipment in the important position of product, small make up the Asia fluid is to introduce what is the principle of superposition type hydraulic control one-way pneumatic valve and related applications of superposition type hydraulic control one-way pneumatic valve.
a, the superposition type hydraulic control one-way pneumatic valve working principle of
as shown above, the superposition type pneumatic hydraulic control one-way pneumatic valve is mainly composed of steel valve body (1), one or two one-way pneumatic valve (2) (3), the forerunner level of piston (4). Main pneumatic valve core is the forerunner of one-way pneumatic valve cone pneumatic valve core (5), through its guarantee one-way pneumatic valve open, when the oil flow from A A, one-way pneumatic valve (2) open, at the same time the forerunner level of piston (4) is pushed to the right place, through the guide cone pneumatic valve core (5) the role of the one-way pneumatic valve (3) to open.
A and B when the inlet pressure loss, the spring force to press in pneumatic pneumatic valve core seat, cut off the oil between the one-way pneumatic valve and actuator.
to ensure that the pneumatic valve cone correctly in place close the pneumatic valve mouth, should use the function of Y type reversing pneumatic valve, let the piston (4) the median, oil tank mouth the A and B of by all.
2, the superposition type hydraulic control one-way pneumatic valve
related applications. Hydraulic cylinder 'supporting' : in the vertical hydraulic cylinder, due to slippery pneumatic valve and pipe leakage, under the gravity of the piston and piston rod, may cause the piston and piston rod. To connect superposition type hydraulic control one-way pneumatic valve in the hydraulic cylinder of the inferior vena oil, can prevent the hydraulic cylinder piston and slider activities such as part of the decline in
. Keep pressure: sliding pneumatic valve type reversing pneumatic valve has clearance leakage phenomenon, pressure maintaining only a short time. When pressure requirements, can be in oil and add a superposition type hydraulic control one-way pneumatic valve, pneumatic valve of cones to shut down the rigor, keep oil pressure maintaining long time
. Implement hydraulic cylinder lock: when the reversing pneumatic valve in the median, the superposition of two type hydraulic control one-way pneumatic valve closed, two cavity can be tightly closed hydraulic cylinder oil, when the piston can't move due to external force.
。 Two large flow discharge of oil: hydraulic cylinder cavity area of effective work vary widely. When the piston return, hydraulic cylinder cavity oil discharge quantity increases sharply, right at this time if the use of small flow slide pneumatic valve, will produce the throttling effect, limiting the backward speed of piston; If adding superposition type hydraulic control one-way pneumatic valve, when the hydraulic cylinder piston back, control oil pressure will be superimposed type hydraulic control one-way pneumatic valve open, can the right cavity oil discharge smoothly.
。 For oil and gas dynamic filling valve: vertical hydraulic cylinder of the piston in the process of high speed dropped, because of the action of high pressure oil and self-respect, causing decreased rapidly, the suction empty and negative pressure, must add oil compensating device. Superposition type hydraulic control one-way pneumatic valve used as oil and gas dynamic filling valve,
to complete oil compensating function. Combined into the reversing pneumatic valve: when designing hydraulic circuits, sometimes superposition type hydraulic control one-way pneumatic valve can be combined into the reversing pneumatic valve is used. For example, using the superposition of two type hydraulic control one-way pneumatic valve and a one-way valve parallel ( One-way pneumatic valve center, is equivalent to a three three-way reversing pneumatic valve commutation circuit. To point out, the control oil pressure oil mouth does not work, should make it back to the fuel tank, or it will be hard to reset, the control piston one-way pneumatic valve reverse as flow.