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Pneumatic micro valve of stepping motor

A technology of stepping motors and micro valves, applied in the field of microfluidics, can solve the problems of high cost, large volume, difficult control, etc., and achieve the effects of low processing cost, simple manufacturing and processing technology, and short cycle

Active Publication Date: 2015-05-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of large volume, difficult control and high cost of conventional pneumatic valves used in existing pressure-driven micro-flow control systems and pneumatic micro-fluidic chips, and provides a stepping motor pneumatic micro-valve

Method used

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  • Pneumatic micro valve of stepping motor
  • Pneumatic micro valve of stepping motor
  • Pneumatic micro valve of stepping motor

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Experimental program
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specific Embodiment approach 1

[0015] Specific implementation mode one: the following combination Figure 1 to Figure 3 Describe this embodiment, the stepper motor pneumatic microvalve described in this embodiment, it comprises flow channel support, gas flow channel, pneumatic microvalve spool actuator and motor fixing plate 10;

[0016] The runner bracket is composed of two U-shaped brackets 1, two U-shaped brackets connecting beams 2 and a first connecting plate 3; two U-shaped brackets 1 are provided with two U-shaped brackets connecting beams 2, and the first connecting plate 3 is arranged on the plane formed by two U-shaped brackets connecting the beams 2;

[0017] The gas flow channel is composed of a base 4, a flat film 5, two hollow steel pipes 6 and a film 7 with a flow channel; Located on opposite sides of the gas flow channel and communicated with the gas flow channel;

[0018] The pneumatic microvalve spool actuator is composed of a second connecting plate 14 and a spool rod 15;

[0019] The ...

specific Embodiment approach 2

[0024] Specific embodiment two: this embodiment will further explain embodiment one, the way that the micro stepping motor 13 is fixed on the motor fixing plate 10 is: adopt two groups of bolts 12 and the fourth nut 17 to cooperate to realize, and these two groups of structures are located in the motor On a diagonal of the fixed plate 10.

[0025] The bolt 12 can be replaced by a short polymer resin tube of similar shape or a rectangular strip-shaped methyl methacrylate (PMMA) tube, and the fourth nut 17 can be fixed by using acrylic modified epoxy glue or ethyl cyanoacrylate. Adhesive way to achieve.

specific Embodiment approach 3

[0026] Specific embodiment three: this embodiment will further illustrate embodiment one or two, the motor fixing plate 10 and the first connection plate 3 are separated in parallel and adopted in the following manner: two screw rods 16 pass through the motor fixing plate 10 and the first connecting plate 3 Connect the flat plate 3, fix the screw rod 16 with the first connecting flat plate 3 with the first nut 8, fix the motor fixed plate 10 with the second nut and the third nut 11, and the two screw rods 16 are located at the other diagonal of the motor fixed plate 10 on-line.

[0027] The fixing of the first nut 8 , the second nut and the third nut 11 can be realized by acrylic modified epoxy glue or ethyl cyanoacrylate through gluing.

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Abstract

The invention discloses a pneumatic micro valve of a stepping motor, belongs to the field of micro-fluid and aims to solve the problems of large size, difficult control and high cost of a conventional pneumatic valve which is used in a pressure-driven type micro flow control system and a pneumatic micro-fluid control chip in the prior art. The pneumatic micro valve of the stepping motor comprises a fluid channel bracket, an air fluid channel, a pneumatic micro valve element actuator and a motor fixing plate, wherein the rubber bracket comprises two U-shaped bracket, two U-shaped bracket connection cross beams and a first connection flat plate; the two U-shaped bracket connection cross beams are arranged on the two U-shaped bracket; the first connection flat plate is arranged on a plane which is formed by the two U-shaped bracket connection cross beams; the air fluid channel comprises a base, a flat film, two hollow steel tubes and a film with a fluid channel; the flat film and the film with the fluid channel are sequentially arranged on the base; the two hollow steel tubes are arranged on two opposite sides of the air fluid channel and are communicated with the air fluid channel; the pneumatic micro valve element actuator comprises a second connection flat plate and a valve element rod; the air fluid channel is fixedly arranged on the fluid channel bracket.

Description

technical field [0001] The invention relates to a pneumatic microvalve driven by a stepping motor, which belongs to the field of microfluid. Background technique [0002] At present, the pneumatic valves used in pressure-driven micro-flow control systems and pneumatic microfluidic chips on the market use conventional pneumatic components. The principle of the pressure-driven micro-flow control system is to control the pressure of the gas through a pneumatic valve, and use this pressure to output the liquid from the liquid storage container at a certain flow rate. The principle of the pneumatic microfluidic chip is to control the switch of the liquid channel by controlling the pressure of the gas channel below the liquid channel on the microfluidic chip. The gas flow (pressure) control valves used in the two are conventional pneumatic valves, which have the following disadvantages: 1) compared with the volume of the microfluidic system / microfluidic chip itself, the volume of...

Claims

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Application Information

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IPC IPC(8): F16K7/16F16K31/04
CPCF16K99/0015F16K99/0042
Inventor 李松晶王进贤曾文刘旭玲
Owner HARBIN INST OF TECH