Electric control high-capacity proportional valve

Abstract

The invention discloses an electric control high-capacity proportional valve. A decompression chamber is arranged inside the electric control high-capacity proportional valve and is connected with a sound guide hole channel, a sensor channel and an exhaust channel; and a main diaphragm with a check valve is arranged in the decompression chamber and can be used for pushing a main shaft part and a secondary shaft part to perform displacement action to detect the sensor channel. When the pressure is too low, the main diaphragm pushes the main shaft part downwards to abut against the secondary shaft part, the secondary shaft part enables a valve opening to perform two-stage displacement distance adjustment to control the fluid flow after the valve opening is opened, and at the moment, primaryside pressure enters an output end of a valve base to improve secondary side pressure, so that the valve opening has the output quantity capable of achieving fine adjustment of the secondary side pressure; and two-stage exhaust can be carried out by utilizing a vent hole formed in the main shaft part and an air flow hole formed in an exhaust chamber, so that an integral structure achieves the purposes of rapid adjustment, precise pressure stabilization and capacity of being suitable for the large-capacity proportional valve by virtue of the two-stage air inlet and exhaust.

Description

technical field [0001] The invention relates to the technical field of proportional valves, in particular to an electronically controlled large-capacity proportional valve. Background technique [0002] Electronically controlled proportional valves are often widely used in different industries, but the power provided by the pneumatic fluid, its stability and the resulting output pressure vary with its air pressure. Therefore, in order to stabilize the pressure output and be controlled by the electronic control system Control, the existing electronically controlled proportional valve for controlling the pressure of the pneumatic fluid is widely used, so as to control the used pneumatic fluid to obtain a stable and controlled pressure. [0003] The existing electronically controlled proportional valves generally have a decompression chamber, a straight rod, and a diaphragm. The operation process is roughly that after the fluid is input at the input end, it flows to the diaphra...

AI Technical Summary

Problems solved by technology

[0004] Due to the pressure difference between the diaphragm and the decompression chamber, a force is applied to the straight rod, so that the input fluid pressure maintains a certain output flow, so the input fluid pressure cannot be used for precise pressure adjustment, and if it is necessary to If it is applied to a larger-capacity electronically controlled proportional valve, its mechanism design will become more complicated. Therefore, in order to make the input fluid play the best role in the large-capacity electronically controlled proportional valve, it is necessary to A structure that can adjust the pressure within the working pressure range and has precision adjustment

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