Function and application of the liquid control one-way valve
In hydraulic systems, the liquid-control one-way valve plays a vital role and its functions are diverse and indispensable。
Basic function of a one-way valve
One-way valves, also known as stop valves or reversible valves, play a vital role in hydraulic systems. It ensures that the fluid flows only in one direction and not in the reverse direction. This one-wayness makes a one-way valve the ideal option to prevent the reverse flow of hydraulic fluids, thus effectively controlling the single-direction flow of fluids. In addition, a one-way valve is often used in conjunction with a throttle to achieve precise control of the speed of the execution element. A one-way valve prevents reverse flow in a hydraulic system and acts as a stopback, while having an important value in controlling the velocity of the element。
The internal construction of a one-way valve includes key components such as valves, cores and springs. Its core function is to allow the flow to pass only in a single direction, and any reverse flow is effectively cut off. This positive guidance, reverse-cut-off working principle makes a one-way valve an indispensable component of a hydraulic system。
One-way valves are widely used in hydraulic systems and are often installed at pump export locations. This configuration not only helps to prevent pressure shocks from impacting the normal operation of the pump, but also effectively prevents system fluids from being pumped back into the tank when the pump is not working. In addition, one-way valves are skilfully used to separate oil routes to prevent interference between high and low pressure。
Specificity of the liquid control one-way valve
A liquid control one-way valve, a special one-way valve, is unique in that reverse circulation can be achieved by controlling fluid pressure. It adds a control road to the normal one-way valve. Under normal circumstances, i. E. When the control of the oil route is not connected to the pressure fluid, the liquid control one-way valve works in a manner different from the normal one-way valve, and the pressure oil can only flow from the point of entry to the point of exit and cannot flow backwards. However, once the control road has a controlled pressure input, the piston pole moves to the right with the pressure oil, thus opening the one-way valve through the top pole to connect to and from the oil vent. In particular, the reverse flow of fluid could be further facilitated if the design of the vent was greater than that of the vent。
This increased control circuit allows the liquid control one-way valves to increase the demand for hydraulic control in specific conditions, for example, in hydraulic support equipment for coal mine machinery, which is particularly important。
The construction and operation of the liquid control one-way valve
The working principles of the liquid one-way valve
A liquid-controlled one-way valve, a special one-way valve, is unique in allowing a one-way valve to flow in reverse by controlling the fluid pressure. This type of valve plays an important role in hydraulic support equipment for coal mine machinery. Compared to conventional one-way valves, the liquid control one-way valves add an additional part called control line k. When the control circuit is not connected to the pressure fluid, the working pattern of the liquid control one-way valve is no different from that of the normal one-way valve, i. E. The pressure oil can flow only from the point of entry to the point of exit and cannot move in reverse. However, once control is exercised over the oil road access control pressure, the piston pole moves to the right under the pressure oil, thus opening the one-way valve through the cap, connecting the exit and exit valves and thus facilitating the reverse flow of the fluid. In particular, this contribution would be more evident if the design of the outlet was larger than the inflow。
Under control pressure input, the liquid control one-way valve is capable of reverse circulation. This feature makes it applicable in situations where specific hydraulic controls are required。
Function and operation of the liquid control one-way valve
Steady pressure
The slide valves are leaking through the valves and therefore only temporarily maintain pressure. In order to meet the need for long-term preservation, a liquid-controlled one-way valve could be added to the oil route, using the tight closure of its cone valves to ensure that it is maintained. The tight closure of a liquid-controlled one-way valve can sustain long-term pressure in oil routes to overcome leakage of the slide valve。
Support and locking of the hydraulic tank
In stand-alone hydraulic cylinders, leaks of slide valves and pipes may result in pistons and pistons falling under gravity. The sinking of the hydraulic tank pistons and other active components can be effectively prevented by access to the liquid control one-way valve in the cavity oil road under the hydraulic tank. One-way liquid control valves can be used to prevent pistons from going down and lock the hydraulic tank to enhance system stability。
When the transition valve is in the middle, the liquid control one-way valve will be closed, thus closely closing the fluids of the two cavities of the hydraulic tank. In this way, the pistons do not move by external force and the hydraulic cylinders are locked。
The flow of oil
There are significant differences in the effective work area of the hydraulic cavity. When the piston retreats, the discharge of the right cavity of the hydraulic tank increases dramatically. The use of small flow slide valves can have a throttle effect, thus limiting the rate of retreat of the pistons. However, when the hydraulic tank piston retreats, the control pressure oil can be used to open the control one-way valve to ensure a smooth discharge of the right cavity. The introduction of a liquid control one-way valve avoids the throttle effect of the small flow slide valve and ensures smooth discharge of the piston when it retreats。
Filling valve function
During the high-speed drop of the piston in a stand-up hydraulic tank, the piston is very fast due to the combined effect of high-pressure oil and its own gravity, which may lead to emptiness and negative pressure. To address this problem, additional oil recharge units are needed. The liquid control one-way valves are used here as filling valves to complete the oil recharge. During high-speed landings, the liquid control one-way valves are used as filling valves to prevent ingestion and negative pressure and to ensure the proper functioning of the system。
