Piezoelectric ceramic flow-limiting valve

Abstract

The invention discloses a piezoelectric ceramic flow-limiting valve. The piezoelectric ceramic flow-limiting valve comprises a pipe body used for being connected into a pipeline for flowing of liquid.A piezoelectric actuator used for controlling the flow of the pipe body is arranged on the pipe body and comprises a plurality of piezoelectric ceramic pieces and further comprises a controller. Thepiezoelectric ceramic pieces are arranged side by side and can be deformed and expanded under the action of voltage to block through holes in the pipe body, and elastic waterproof outer walls wrappingthe piezoelectric ceramic pieces are arranged on the outer sides of the piezoelectric ceramic pieces. The controller is connected to the piezoelectric ceramic pieces in a control mode and is used forcontrolling the voltage applied to the piezoelectric ceramic pieces to control the deformation of the piezoelectric ceramic pieces. Conventional electromagnetic drive is replaced with the piezoelectric effect, maintaining current can be reduced, and energy consumption can be reduced; and besides, as the deformation of the piezoelectric ceramic pieces is relative to the voltage applied to the piezoelectric ceramic pieces, electromagnetic interference is avoided, precise control over the deformation of the piezoelectric ceramic pieces can be achieved by controlling the voltage applied to the piezoelectric ceramic pieces, and thus the control precision on flow can be improved.

Description

technical field [0001] The invention relates to the technical field of fluid control, and more specifically relates to a piezoelectric ceramic flow limiting valve. Background technique [0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that enables or stops the flow of media (liquid, gas, powder) in piping and equipment and controls its flow. The valve is a control component in the pipeline fluid conveying system, which is used to change the passage section and the flow direction of the medium, and has the functions of diversion, cut-off, throttling, check, diversion or overflow and pressure relief. Valves used for fluid control range from the simplest shut-off valve to various valves used in extremely complex automatic control systems. Valves for industrial pipelines. It can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid met...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing automatic control system valves use electromagnetic drive, which consumes a large amount of holding current in the working state, and the existing electromagnetic drive is significantly interfered by the external electromagnetic field, the displacement accuracy is not high, and it is not easy to accurately control the size of the gate

Images