A plug-in direct-acting proportional pressure reducing valve

Abstract

The invention discloses a plug-in type direct-acting proportional pressure reducing valve. The valve comprises a valve body provided with an oil port A, and a screw sleeve is arranged on the valve body; the valve also comprises a pressure regulating assembly used for adjusting the pressure of the oil port A, and a valve seat connected with an oil port P is arranged in the valve body; an installation groove and a valve hole are formed in the valve seat in the axial direction of the valve seat, wherein the valve hole is used for communicating the installation groove and the oil port A; a valve element assembly used for controlling opening and closing of the control valve is slidably connected in the installation groove, and a first spring which forces the valve element assembly to move towards the valve hole; a screw plug for adjusting the pre-tightening force of the first spring; and a first through-flow hole used for communicating the mounting groove and the oil port P is formed in thevalve seat; a valve sleeve connected with the valve seat is arranged in the valve body, a push rod matched with the valve element assembly and used for controlling opening and closing of the valve core is slidably connected in the valve sleeve, and a second spring which is used for forcing the push rod to move towards the valve seat is arranged in the screw sleeve; and the valve is simple in structure, large in flow-through flow, free of leakage and high in response speed.

Description

technical field [0001] The invention relates to the technical field of hydraulic valves, in particular to a plug-in direct-acting proportional pressure reducing valve. Background technique [0002] Proportional pressure reducing valve is a control valve that uses current changes to continuously and proportionally reduce the pressure of the liquid inlet. Proportional pressure reducing valves are divided into direct-acting proportional pressure reducing valves and pilot-operated proportional pressure reducing valves according to the control method. Valve, the direct-acting proportional pressure reducing valve directly compares the force output by the proportional electromagnet with the spring to control the opening of the spool, and then controls the pressure at the outlet. The direct-acting proportional pressure reducing valve has fast response and low leakage. Small size, but because the output force of the proportional solenoid is limited, it is only suitable for small flow...

AI Technical Summary

Problems solved by technology

At present, in many practical applications, large flow rate, fast response speed and small leakage are required, and the existing direct-acting proportional pressure reducing valves and pilot-operated proportional pressure reducing valves cannot meet the requirements.

Images