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Microfluid active control valve with toroid boundary

An active control, torus technology, applied in diaphragm valves, valve devices, valve details, etc., can solve problems such as sudden drop in pump flow

Inactive Publication Date: 2010-08-25
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to increase the pump flow, the only way is to increase the vibration frequency of the piezoelectric vibrator. When the mechanical reversing valve is used, the pump flow will drop sharply after the frequency is increased.

Method used

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  • Microfluid active control valve with toroid boundary
  • Microfluid active control valve with toroid boundary
  • Microfluid active control valve with toroid boundary

Examples

Experimental program
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Effect test

Embodiment Construction

[0033] Referring to the accompanying drawings, the specific implementation of the piezoelectric valve of the present invention will be described in detail below.

[0034] In the accompanying drawings: 1 is the valve body, 2 and 21 are thin film actuators, 3 is the boundary of the torus, 4 is the fluid, 5 and 11 are the flow direction of the microfluid, 6 is the liquid inlet channel (liquid outlet channel), and 7 is the Liquid inlet (liquid outlet), 8 is a fluid cavity, 9 is a liquid outlet channel (liquid inlet channel), 10 is a liquid outlet (liquid inlet), 12, 22 are elastic diaphragms, 13 is a piezoelectric ceramic circle Disc, 14 is wire, 15 is glue for fixing wire, 16 is wire fixing clip, 17 is sealing ring, 18 is valve cover, 19 is piezoelectric vibrator, 20 is connecting bolt, 23 is linear electric controllable actuator, 24 places the ring for the sealing ring, and 25 is the boss of the ring surface.

[0035] Referring to accompanying drawings 1 and 2 (a top view with ...

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Abstract

The invention discloses an active control valve of a micro fluid, which is provided with torus boundaries. A through hole, of which the radius is R, and a circular cylindrical cavity which is coaxial with the through hole are processed on a valve body, and the torus boundaries are formed naturally. A film executive element not only forms a closed fluid cavity which is connected with a liquid outlet through a liquid output channel with the circular cylindrical cavity but also contacts with the torus boundaries to separate a liquid input channel and the liquid output channel. The film executiveelement is caused to make vibration or distortion to change the distance from the torus boundaries by an external control single when the valve at a natural state is closed, thus realizing the opening, closing and degrees of the valve. The active control valve of the invention can realize the control of an extreme small flux, thereby reaching an extreme high flux control precision; and the opening and close of the valve is actively controlled by the film executive elements can reduce the hysteresis of the valve, thus improving working efficiency and guaranteeing that the film executive element has certain predeformation to provide stanching property; besides, no locomotive mechanical part has advantages of quick response and good reliability and durability.

Description

technical field [0001] The invention belongs to the technical field of fluid machinery, and relates to the principle and structure of a valve for realizing microfluid active control, in particular to a microfluid active control valve for opening and closing the microfluid control valve by a flexible film actuator. Background technique [0002] During the development of microfluidic pumps, various valves were developed to overcome the wear and leakage of conventional valves. Micro valves can be divided into active valves and passive valves. Active valves can be divided into piezoelectric, shape memory alloy, electrostatic, electromagnetic, thermopneumatic, etc. according to the driving principle. The active shut-off valve uses a driver to control the opening and closing of the valve, which is controllable. The active shut-off valve made with different driving principles has its own advantages and is suitable for specific application fields. Spenser published research work o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K7/00F16K31/66
Inventor 王代华明亮潘春鹏
Owner CHONGQING UNIV
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