Pressure feedback secondary pilot control plugged-in type proportion relief valve system

Abstract

The invention relates to a pressure feedback secondary pilot control plugged-in type proportion relief valve system, in particular to a pressure feedback secondary pilot control plugged-in type proportion relief valve system device capable of realizing pressure proportion regulation in the open or closed process by a hydraulic system valve. The side face of a main valve sleeve is provided with a main valve oil inlet and a main valve oil outlet; a main valve core is arranged in an axial hole of the main valve sleeve; a first return spring is arranged between a cover gasket and the main valve core; the side face of a control cover plate is provided with a pressure sensor; a cone valve core and an adjusting screw rod are arranged in an axial hole of a threaded sleeve; a pressure adjusting spring is arranged between the cone valve core and the adjusting screw rod; a locking nut is arranged at one end of the adjusting screw rod; and the middle part of the jointing of the control cover plate and the cover gasket is provided with a first damping hole, and a third damping hole is arranged between a control oil port of the control cover plate and the first damping hole. The pressure feedback secondary pilot control plugged-in type proportion relief valve system has the effects that the structure is simple, and the pressure feedback secondary pilot control plugged-in type proportion relief valve system is opened instantly, is controlled proportionally, adopts the pressure closed loop feedback, and is widely used in the hydraulic control systems of machine tools, casting and forging,compression casting, metallurgy, ships and mine industry.

Description

Technical field: [0001] The invention relates to a pressure feedback two-stage pilot control plug-in proportional overflow valve system, in particular to a pressure feedback two-stage pilot control plug-in proportional relief valve system that realizes pressure proportional adjustment during the opening or closing process of a hydraulic system valve equipment. Background technique: [0002] At present, the hydraulic cartridge valve has a series of advantages such as simple structure, small flow resistance, small impact, large flow capacity, fast action, and less leakage. It has been widely used in machine tools, casting and forging, die-casting, metallurgy, ships, mines, etc. and other industries. The existing proportional relief valve adopts a direct-acting structure, and the response speed is slow when it is opened under the condition of large flow, and the system is pressurized; the proportional relief valve with large flow is used as the pilot stage for control, and the...

AI Technical Summary

Problems solved by technology

The existing proportional relief valve adopts a direct-acting structure, and the response speed is slow when it is opened under the condition of large flow, and the system is pressurized; the proportional relief valve with large flow is used as the pilot stage for control, and the production cost is high, but the above The situation cannot realize the pressure closed loop, and the control accuracy is poor. In some situations involving safety and high precision, precise control is required, and the existing valves cannot be reliably controlled.

Images