Hydraulic pneumatic valve classification is introduced in detail

in the hydraulic transmission is used to control the liquid pressure? The direction of the flow and components. Called pressure control pneumatic valve which control pressure, flow control are called flow control pneumatic valve, control access? And referred to as the direction of the flow control of pneumatic valve. Pneumatic valve into the overflow according to the use of pneumatic pressure control valve? Vacuum pneumatic valve and pneumatic valve sequence.
( Pneumatic valve, overflow to control hydraulic system to be in when setting pressure constant state. For the overflow of the overload protection pneumatic valve pneumatic valve called security. When the system fails, the pressure to limit may cause damage, the pneumatic valve will open and the overflow mouth, to ensure the security of the system.
( Pneumatic valve, decompression to control the stability of the branch circuit to get lower than the main loop hydraulic pressure. Reduced pressure pneumatic valve according to its function of the control of pressure, and can be divided into fixed value reduced pressure pneumatic valve ( The output pressure is constant value? Differential vacuum pneumatic valve ( The input and output pressure difference for fixed value and constant ratio reduced pressure pneumatic valve ( Keep certain proportion between the input and output pressure.
( Pneumatic valve: order to make a actuators ( Such as hydraulic cylinder? Actions such as hydraulic pressure motor, in order to make other actuators. Oil pump pressure to drive the hydraulic cylinder movement, at the same time through A sequence of the pneumatic valve inlet on the area of A, when the hydraulic cylinder motion completely into pressure, role in the area of A upward thrust is greater than the spring after the setting of the pneumatic valve core rising oil inlet and oil outlet are interlinked, make the hydraulic cylinder motion.
traffic control pneumatic valve using pneumatic valve core and valve body between the throttle opening area and its local resistance on flow adjustment, so as to control the movement speed of executive element, the. Flow control pneumatic valve can be divided into according to the use of.
( Pneumatic valve throttle: after setting throttling mouth area, little change can make the load stress and motion uniformity requirements is not high movement speed of executive element, the basically remained stable.
( Speed control pneumatic valve: when load pressure changes can keep the import and export of pneumatic valve throttle differential pressure for the fixed value. At the throttle mouth area of setting later, no matter how change, load stress can keep through the throttle control pneumatic valve pneumatic valve flow rate constant, so that the movement speed of executive element, the stable.
( Shunt pneumatic valve: no matter the load size, can make the same oil source of two actuators, be equal to the flow for the amount of shunt pneumatic valve or synchronous pneumatic valve; For the proportion of shunt proportional distribution flow rate from pneumatic valve.
( Collector pneumatic valve: role, in contrast to the shunt pneumatic valve, the flow into the collector flow proportional distribution of pneumatic valve.
( Shunt collector pneumatic valve: both shunt pneumatic valve and collecting pneumatic valve two functions. Direction control pneumatic valve is divided into one-way according to the use of pneumatic valves and reversing pneumatic valve.
one-way pneumatic valve: only allow fluid unidirectional connected in the pipeline, the reverse is cut off. The reversing pneumatic valve: change between different line pass? Broken relationship? According to the work location in the pneumatic valve pneumatic valve core number two points? Three, etc. Based on the control points and two-way channel count? Tee? Cross? Five, etc. ; According to the driving mode of pneumatic valve core break up move? Motor? Electric? Hydraulic, etc. The picture shows three position four-way reversing the working principle of pneumatic valve. P for oil supply, O for oil return, A? B is the outlet to actuators. When pneumatic valve core in the median, oil mouth cut off, all components of fixed; When the pneumatic valve core moves to the right place, with A P, B and O. When moved to the left A pneumatic valve core, P and B, A and O. So actuators can be positive? A reverse movement.