Mute controllable electric pinch valve

Abstract

The invention discloses a mute controllable electric pinch valve. The mute controllable electric pinch valve comprises a valve shell as well as a control assembly, a motion transformation assembly, a step motor, a connecting rod and a pinch head assembly which are arranged in the valve shell, wherein the pinch head assembly comprises an upper valve plate and a lower valve plate; a hose passage is arranged between the upper valve plate and the lower valve plate; under the control of the control assembly, the step motor drives the motion transformation assembly for transforming rotation motion of the step motor into linear motion; the motion transformation assembly is connected with the upper valve plate through the connecting rod; and the upper valve plate and the lower valve plate are clamped or a hose is loosened by virtue of the linear motion of the upper valve plate. The mute controllable electric pinch valve disclosed by the invention solves the problems that an electromagnetic pinch valve is great in noise, is non-adjustable, is great in starting current, is short in stroke and the like, and meets the special use requirements of a hospital ward. The mute controllable electric pinch valve also solves the problem that the electromagnetic pinch valve cannot adjust closing degree of the pinch head, so that the effect of controlling fluid velocity is achieved by controlling a distance between valve plates.

Description

Technical field [0001] The invention belongs to the field of electric valves, and particularly relates to a silent and controllable electric pinch valve. Background technique [0002] Pinch valve (Pinch Valve), also known as pinch valve, air bag valve, pinch-off valve, etc., is now used in sewage treatment, power plant, mining, chemical, medical and other fields. According to different driving methods, pinch valves can be divided into manual pinch valves, pneumatic pinch valves, electric pinch valves and hydraulic pinch valves. [0003] Most of the currently used electric pinch valves are driven by electromagnets. Since these pinch valves can be made into microstructures, they are widely used in the medical field. However, the solenoid pinch valve has the following shortcomings: (1) When the electromagnet is closed and released, it will produce a "pop" sound, which cannot meet the quiet requirements of the hospital ward; (2) The electromagnet only has the attraction and release W...

AI Technical Summary

Problems solved by technology

However, the electromagnetic pinch valve has the following defects: (1) When the electromagnet pulls in and releases, it will produce a "popping" sound, which cannot meet the quiet requirements of the hospital ward; (2) The electromagnet only has pull-in and release. In two states of opening, the pinch valve cannot control the flow rate of the fluid in the pipe; (3) The starting current of the electromagnet is very large; (4) The stroke of the electromagnet is short, resulting in a short stroke of the pinch valve

[0004] Especially when electric pinch valves are used in the medical field, the sound from the electromagnet is likely to make the patient feel irritable, which is not conducive to the recovery of the patient.

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