How many categories do you know about hydraulic solenoid valve?

Question: How many categories do you know about Hydraulic Solenoid Valves

Answer: As is well known, hydraulic Solenoid Valves refer to components used in hydraulic transmission to control liquid pressure, flow rate, and direction. The one that controls pressure is called a pressure control valve, the one that controls flow is called a flow control valve, and the one that controls on, off, and flow is called a directional control valve.

1. Pressure control valve: It is divided into Overflow Valve, Pressure Reducing Valve, and Sequence Valve according to its purpose.

1. Relief valve: able to control the hydraulic system to maintain a constant state when reaching the set pressure. The overflow valve used for overload protection is called a safety valve. When the system malfunctions and the pressure rises to a limit that may cause damage, the valve port will open and overflow to ensure the safety of the system.

2. Pressure reducing valve: able to control the branch circuit to obtain a stable pressure lower than the main circuit oil pressure. Pressure reducing valves can be divided into fixed value pressure reducing valves (output pressure is a constant value), fixed differential pressure reducing valves (input and output pressure difference is a constant value), and fixed ratio pressure reducing valves (input and output pressure maintain a certain proportion) according to the pressure functions they control.

3. Sequential valve: capable of causing one executive component (such as hydraulic cylinder, Hydraulic Motor, etc.) to act, and then sequentially causing other executive components to act. The pressure generated by the oil pump first drives hydraulic cylinder 1 to move, and at the same time, it acts on area A through the oil inlet of the sequence valve. When the movement of hydraulic cylinder 1 is complete, the pressure rises, and the upward thrust acting on area A is greater than the set value of the spring. The valve core rises to connect the oil inlet and outlet, causing hydraulic cylinder 2 to move.

2. Flow control valve: By adjusting the area of the throttle port between the valve core and valve body and the local resistance it generates, the flow is adjusted to control the movement speed of the actuator. Flow control valves are divided into five types according to their purpose:

1. Throttling valve: After adjusting the area of the throttling port, the motion speed of the actuator components that have little change in load pressure and low requirements for motion uniformity can be basically stable.

2. Speed regulating valve: able to maintain the inlet and outlet pressure difference of the throttle valve as a constant value when the load pressure changes. In this way, after the throttle area is adjusted, regardless of how the load pressure changes, the speed control valve can maintain the same flow rate through the throttle valve, thereby stabilizing the motion speed of the actuator.

3. Diverter valve: An equal flow diverter valve or Synchronous Valve that can achieve equal flow for two executing components of the same oil source, regardless of load size; The proportional diverter valve obtains proportional flow distribution.

4. Collecting valve: The function is opposite to the diverter valve, which distributes the flow into the collecting valve proportionally.

5. Diverter and collector valve: It has two functions: a diverter valve and a collector valve.



3. Directional control valve: It is divided into One-way Valve and Directional Valve according to its purpose.

1. One-way valve: Only allow fluid to be connected in one direction in the pipeline, and cut off in the opposite direction.

2. Reversing valve: Change the on/off relationship between different pipelines, and divide the valve core into two or three positions based on its working position in the valve body; Divide into two ways, three ways, four ways, five ways, etc. based on the number of controlled channels; According to the driving mode of the valve core, it can be divided into dynamic, motorized, electric, hydraulic, etc.