Proportional pressure valve with air supply switch

Abstract

The proportional pressure valve comprises a main valve body and a control module, the main valve body is provided with an electric control assembly, a push rod, an air inlet, a working port, an exhaust port, an air inlet cavity, a middle cavity and an exhaust cavity, and a first valve port and a valve element are arranged in the main valve body; the working port is provided with a pressure feedback device; a first communicating hole is formed in the side wall of the valve element; an exhaust seat is arranged in the main valve body; the device further comprises a first elastic piece and a second elastic piece. The main valve body is provided with an air inlet module, the air inlet module comprises a cover body, an air channel and a switch valve, and the air channel comprises a main air inlet channel and a branch channel. The pressure maintaining valve has the following advantages and effects that the air inlet, pressure maintaining and air exhaust processes can be achieved, the air pressure at the working port can be controlled in time through the pressure feedback device, long-time stable pressure maintaining is achieved, and the pressure maintaining valve is controllable at any time through pressure feedback, convenient to use, more compact in structure, small in size and convenient to package and transport.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a proportional pressure valve with an air supply switch. Background technique [0002] As a highly integrated mechatronic product, proportional pressure valve is the core of electrical proportional control technology and represents the development direction of fluid control technology. It is widely used in factory automation and vehicle control. [0003] The existing proportional pressure valve mainly includes an intake port, an exhaust port and a working port, and the working port is connected to the gas-using equipment. When the equipment needs to input different gases, the air inlet needs to be connected to multiple gas pipes, and each gas pipe is connected to different gases, and the on-off is realized through the control valve. The control valve and the gas pipe are separated from the proportional pressure valve. The total volume is large, the structure is loose, and it is i...

AI Technical Summary

Problems solved by technology

[0003] The existing proportional pressure valve mainly includes an air inlet, an exhaust port and a working port. The working port is connected to the gas-consuming equipment. When the equipment needs to input different gases, the air inlet needs to be connected with multiple gas delivery pipes, and each gas delivery pipe is connected to different gases, and the on-off is realized through the control valve respectively. The control valve and the gas delivery pipe are separated from the proportional pressure valve. The overall volume is large, the structure is loose, and it is not convenient for packaging and transportation

In addition, the existing proportional pressure valve is difficult to achieve long-term stable pressure maintenance and pressure regulation at any time

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