Introduction of hydraulic valve

Hydraulic valve is an automatic component operated by pressure oil. It is controlled by pressure oil of pressure distribution valve. It is usually used in combination with electromagnetic pressure distribution valve and can be used to remotely control the on-off of oil, gas and water pipeline systems in hydropower stations. Commonly used for clamping, control, lubrication and other oil circuits. There are direct-acting type and pilot type, and the pilot type is mostly used.

Hydraulic valves have many different uses. The first is to control the flow of fluid. They do this by switching the flow rate on or off. They can also be used to control the speed of hydraulic cylinders and actuators. The flow rate of the fluid is proportional to the operating speed.

Another application for hydraulic valves is pilot actuation. The pilot actuation uses pressurized fluid to assist the movement of the valve flow control element. This method is especially useful in explosive atmospheres where electrical/electronic equipment is not suitable. There is also a risk of sparks, which could result in an explosion.

To meet these requirements, hydraulic valves should be able to handle high flows of fluid. They should also be robust and reliable. In addition, hydraulic valves should not generate excessive noise or vibration. They should also have improved sealing and core stability. Finally, hydraulic valves must be durable and small for easy installation.

The purpose of hydraulic valve

According to the purpose, it is divided into one-way valve and reversing valve. One-way valve: Only allow the fluid to be connected in one direction in the pipeline, and the reverse is cut off. Reversing valve: Change the on and off relationship between different pipelines. Its output (pressure, flow) can change continuously with the input electrical signal.

According to the purpose, it is divided into relief valve, pressure reducing valve and sequence valve. Relief valve: It can control the hydraulic system to maintain a constant state when the set pressure is reached. The relief valve used for overload protection is called a safety valve. When the system fails and the pressure rises to a limit value that may cause damage, the valve port will open and overflow to ensure the safety of the system. Pressure reducing valve: It can control the branch circuit to obtain a stable pressure lower than the main circuit oil pressure. The pressure reducing valve can be divided into fixed value pressure reducing valve, fixed difference pressure reducing valve and fixed ratio pressure reducing valve according to the different pressure functions it controls. Sequence valve: After making one actuator act, other actuators act in sequence.

Design principle of hydraulic valve

The design of the hydraulic valve is mainly for the design of the hydraulic valve group, and the hydraulic valve group must consider the oil circuit before the design. It is necessary to determine in advance which parts of the oil circuit can be integrated. The design of the oil circuit must be simple and save money. Go for unnecessary steps. After the oil circuit is determined, the main ones are the inclined holes and the process holes. These things on the oil road should be reduced, so long as they are enough, there is no need for too many. In the design of the inclined holes and the process holes, pay attention to the diameter of the hole. With the matching of traffic, the direction and position must be appropriate, and the overall situation must be considered to ensure that the requirements are met. If there is some inappropriate orientation or position, and the components need to be adjusted, it is necessary to ensure simple and convenient operation and maintenance.