Classification of hydraulic valves on single-column hydraulic presses

Classification of hydraulic valves on single-column hydraulic presses

The hydraulic valve is an important part in the control system of the single-column hydraulic press. Different hydraulic valve components constitute the core of the hydraulic control system. From the structure, the hydraulic valve is divided into a spool valve, a poppet valve and a cartridge valve. The three types are described in detail below. valve.

The slide valve is mainly composed of a valve core and a valve body. Depending on the change of the axial position of the valve core in the valve body, each liquid flow channel connected to the valve body is connected or disconnected, thereby changing the direction and flow of the liquid flow. The slide valve of the column hydraulic press is sealed by the gap between the valve core and the valve body, and leakage is inevitable, so it is suitable for oil pressure rotation with high viscosity, but not suitable for hydraulic transmission; in addition, the flow capacity of the slide valve is relatively small , It is not suitable for large flow systems, and the valve core is often driven by electromagnets.

In the past, the poppet valve was commonly used in the hydraulic system of the single-column hydraulic press, and the conical surface of the valve was used to block the liquid flow. When the upper part of the valve has high-pressure hydraulic pressure, it must be assisted by a relay or a single-top cylinder. The poppet valve is suitable for high pressure and large pressure. Flow hydraulic press.

The cartridge valve, also known as the cartridge poppet valve, is composed of a cartridge valve unit, a control cover and a pilot control valve; the pilot control valve of the cartridge valve has a small power, which has obvious energy saving effect for single-column hydraulic presses; changing different pilots The control valve and cover plate can realize the functions of different valves; the valves with different functions can be inserted into an integrated valve body, and the channels between the valves are connected through the oil holes inside the valve body to realize pipeless connection and reduce leakage. generation, centralized and standardized; simple structure, large flow capacity, suitable for various high-pressure and large-flow systems. WORLD Press Machine official website www.pressmachine-world.com, please indicate the source for reprinting!

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