Load-carrying adjustable electric proportional large-flow one-way throttle valve

Abstract

The invention relates to a load-carrying adjustable electric proportional large-flow one-way throttle valve, and relates to the technical field of fluid transmission and control. Proportional throttlecontrol and direction control of a large-flow fluid medium can be realized through a single-stage valve without additional control components such as a reversing valve, a one-way valve and a pilot valve, so that the problems that the existing proportional throttle valve can realize large-flow control only by adding the pilot valve and can realize fluid direction control only by adding the reversing valve and the one-way valve are avoided; and the load-carrying adjustable electric proportional large-flow one-way throttle valve is simple in structure, high in integration level, small in size and weight and easy to mount and maintain.

Description

technical field [0001] The invention relates to the technical field of fluid transmission and control, in particular to a one-way throttle valve with adjustable electric ratio and large flow with load. Background technique [0002] According to the input electrical signal, the electric proportional valve can continuously control the pressure and flow of the fluid medium in proportion, and has the advantages of strong anti-pollution ability and fast response speed. The current electro-proportional throttle valve is based on conventional throttle valves, and uses electrical-mechanical converters such as proportional electromagnets to control the opening of the throttle opening, but the valve itself usually cannot control the direction of the fluid medium. When it is necessary to control the direction of the fluid, it is often necessary to connect the electric proportional throttle valve in parallel or in series with additional reversing valves, check valves, etc., which leads ...

AI Technical Summary

Problems solved by technology

The current electro-proportional throttle valve is based on conventional throttle valves, using electrical-mechanical converters such as proportional electromagnets to control the opening of the throttle port, and the valve itself usually cannot control the direction of the fluid medium.

When it is necessary to control the direction of the fluid, it is often necessary to connect the electric proportional throttle valve in parallel or in series with additional reversing valves, check valves, etc., which leads to large structural volume and weight of the valve group, and complex piping layout of the system. shortcoming

In addition, when the diameter of the proportional valve is greater than 16mm, it is limited by the thrust of the electro-mechanical converter, and the form of pilot control is often used, that is, the proportional solenoid is used to first drive a pilot valve with a small diameter, and then the pilot stage valve is used The hydraulic amplification function controls the main throttle valve to realize continuous adjustment of fluid medium pressure and flow parameters. Therefore, when controlling large flow medium, the proportional valve must include a two-stage valve group of pilot valve and main valve, resulting in the internal structure of the proportional valve. And the control oil circuit is complicated, and the size and weight of the valve are relatively large, which limits its application in occasions where the installation space and weight are limited

Images