CN104896190A - One-way valve with plane structure - Google Patents
One-way valve with plane structure Download PDFInfo
- Publication number
- CN104896190A CN104896190A CN201510231300.5A CN201510231300A CN104896190A CN 104896190 A CN104896190 A CN 104896190A CN 201510231300 A CN201510231300 A CN 201510231300A CN 104896190 A CN104896190 A CN 104896190A
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- CN
- China
- Prior art keywords
- way valve
- runner
- cover plate
- elastomer
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K99/0001—Microvalves
- F16K99/0003—Constructional types of microvalves; Details of the cutting-off member
- F16K99/0015—Diaphragm or membrane valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K99/0001—Microvalves
- F16K99/0034—Operating means specially adapted for microvalves
- F16K99/0055—Operating means specially adapted for microvalves actuated by fluids
- F16K99/0057—Operating means specially adapted for microvalves actuated by fluids the fluid being the circulating fluid itself, e.g. check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K99/00—Subject matter not provided for in other groups of this subclass
- F16K2099/0073—Fabrication methods specifically adapted for microvalves
- F16K2099/0074—Fabrication methods specifically adapted for microvalves using photolithography, e.g. etching
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a one-way valve with a plane structure. The one-way valve comprises a basal plate, a runner layer, a cover plate and an elastic body, wherein the basal plate and the cover plate are both flat plates; two channels not communicated are formed in the lower surface of the runner layer, and are respectively an inlet runner and an outlet runner; circular through holes are formed in the end parts of the inlet runner and the outlet runner, and are respectively an inlet and an outlet; a buffer cavity is formed in the upper surface of the runner layer; the bottom surface of the buffer cavity is a plane, and is parallel to the upper surface of the runner layer; the inlet and the outlet both pass through the lower surface of the buffer cavity; the elastic body is arranged above the inlet, and is compressed between the runner layer and the cover plate; and the inlet is closed. The one-way valve has the beneficial effects of good closure and more stable side threshold of the elastic body. As the structure of the one-way valve is the plane structure, the assembly process is simple. The one-way valve can achieve an effect of one-way current limiting, and can realize a valve breaking function when liquid forwards flows, that is, the valve can be opened when the liquid pressure reaches a rated value.
Description
Technical field
The present invention relates to micro-fluidic field, particularly relate to micro-fluidic in one-way valve, its improvements are in the contact avoiding elastomer sidewalls and chip, make threshold value more stable, and have employed the technique with conventional microelectromechanical process compatible, simplify and be assemblied in preparation process.
Background technique
One-way valve (check valve or one-way valve) is that fluid can only flow along water intake, a kind of valve that water outlet medium but cannot reflux, and is the important valve of a class in micro-fluidic field.The J. Loverich etc. of Kyoto University in 2006 devises a kind of one-way valve based on PDMS, and this valve arrangement is simple, easy to prepare, only needs a replica.But this one-way valve exists very large leakage problem, can not realize real unidirectional, just flow velocity reduced.The K. Iwai of University of California Berkeley in 2011 etc. this one-way valve is applied to FINGER-POWERED micro-fluidic in.Winconsin university Dongshin Kim in 2007 etc. propose a kind of one-way valve utilizing water gel to prepare.This method, by preparation method's complanation, simplifies assembly technology, but its elastomeric upper and lower surface contacts with chip, can cause the less stable of threshold value.The Ronalee Lo etc. of University of Southern California in 2011 devises a kind of modular one-way valve, this valve arrangement is reliable, but is only applicable to be arranged in pipeline, and flow velocity does not rise counter falling when pressure reaches certain value, not by too high flow, assembly technology is complicated, cost is high.In the same year, the K. Ou etc. of UBC devises a kind of one-way valve based on pearl.2012, the Ryan D. Sochol etc. of University of California Berkeley improved this structure, and by designing the stake that two row intersect, retrain the motion of pearl, making originally to use the situation of a lot of pearl to become only needs use pearl.The one-way valve structures that this pearl makes is simple, cost is low, but speed of response is slow, and oppositely encapsulation is poor.
Summary of the invention
In order to improve reverse encapsulation, threshold stability and the simplification assembly technology in traditional microfluidic one-way valve, the present invention proposes a kind of one-way valve of plane structure.
The present invention is achieved by the following technical solutions: a kind of one-way valve of plane structure, comprise substrate, runner layer, cover plate and elastomer, substrate and cover plate are flat board, the lower surface of runner layer has two disconnected raceway grooves, be respectively entrance channel and outlet flow, there is circular through hole the end of entrance channel and outlet flow, be respectively entrance and exit, runner layer upper surface is provided with buffer cavity, the bottom surface of described buffer cavity is plane, and it is parallel with runner layer upper surface, entrance and exit is all by the lower surface of buffer cavity, the top of entrance is provided with elastomer, elastomer is compressed between runner layer and cover plate, close entrance.
Described elastomeric upper surface and the lower surface of cover plate bond, and described elastomer is column, and elastomeric lower surface contacts with the bottom surface of buffer cavity.
After described elastomer has assembled, there is certain decrement, play the effect of closed entrance.Flow into from entrance channel, through entrance, when driving pressure suffered by liquid is enough large, liquid can back down elastomer, realizes the forward circulation of valve.And when liquid reverse flow, liquid flows into from outlet flow, flow through outlet, but cannot elastomer be backed down, so oppositely cannot circulate, so just serve the effect of one-way valve.
Described substrate, runner layer and cover plate are the flat board that polymethylmethacrylate makes.
Described elastomer is cylindrical, and material is water gel.
Described elastomer is prepared in lid surface by photoetching process.
Beneficial effect of the present invention: elastomer and buffer cavity bottom surface are plane contact, so encapsulation is good.Elastomeric sidewall and chip contactless, there is not extra frictional force, so the threshold value of one-way valve is only relevant with pre compressed magnitude, threshold value is more stable.Because the structure of this one-way valve is plane structure, assembly technology is simple.And this one-way valve not only can reach the effect of Unidirectional flow-limiting, also can realize the function breaking through valve when liquid forward flow, namely when fluid pressure reaches rating value, valve just can be opened.
accompanying drawing illustrates:
Fig. 1 is one-way valve overall structure figure;
Fig. 2 is runner layer lower surface configuration figure;
Fig. 3 is runner layer surface structure figure;
Wherein 1 substrate, 2 entrance channels, 3 runner layers, 4 cover plates, 5 elastomers, 6 outlet flow, 7 entrances, 8 outlets, 9 buffer cavitys.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described with enforcement.
As shown in Figure 1, 2, 3, the one-way valve of a kind of plane structure described in the present embodiment, comprises substrate 1, runner layer 3, cover plate 4 and elastomer 5.The flat board that described substrate 1 and cover plate 4 make for polymethylmethacrylate.The material of described runner layer 3 is polymethylmethacrylate, and its lower surface is provided with two disconnected rectangular channel, is respectively entrance channel 2 and outlet flow 6.There is circular through hole the end of described entrance channel 2 and outlet flow 6, is respectively entrance 7 and outlet 8.The upper surface of described runner layer 3 is provided with buffer cavity 9, and described buffer cavity 9 is a rectangular recess, and entrance 7 and outlet 8 are all by the bottom surface of buffer cavity 9.The bottom surface of described buffer cavity 9 is a plane, and parallel with runner layer 3 upper surface.Described elastomer 5 is cylindrical, and material is water gel, and the lower surface of its upper surface and cover plate 4 is bonded together.Described elastomer 5 is prepared in cover plate 4 surface by photoetching process, and before not contacting water, the thickness of elastomer 5 is less than the height between cover plate 4 lower surface to buffer cavity 9 bottom surface, after contact water, elastomer 5 expands, and withstands the bottom surface of buffer cavity 9, and produces certain decrement.During liquid forward flow, flow into from entrance channel 2, through entrance 7, when driving pressure suffered by liquid is enough large, liquid can back down elastomer 5, realizes the forward circulation of valve.And when liquid reverse flow, liquid flows into from outlet, flow through outlet, but elastomer 5 cannot be backed down, so oppositely cannot circulate, so just serve the effect of one-way valve.
Claims (6)
1. the one-way valve of a plane structure, it is characterized in that: comprise substrate (1), runner layer (3), cover plate (4) and elastomer (5), substrate (1) and cover plate (4) are flat board, the lower surface of runner layer (3) has two disconnected raceway grooves, be respectively entrance channel (2) and outlet flow (6), there is circular through hole the end of entrance channel (2) and outlet flow (6), be respectively entrance (7) and outlet (8), runner layer (3) upper surface is provided with buffer cavity (9), the bottom surface of described buffer cavity is plane, and it is parallel with runner layer upper surface, entrance (7) and outlet (8) are all by the lower surface of buffer cavity (9), the top of entrance (7) is provided with elastomer (5), elastomer (5) is compressed between runner layer (3) and cover plate (4), close entrance (7).
2. the one-way valve of plane structure according to claim 1, it is characterized in that: the upper surface of described elastomer (5) and the lower surface of cover plate (4) bond, described elastomer (5) is column, and the lower surface of elastomer (5) contacts with the bottom surface of buffer cavity (9).
3. the one-way valve of plane structure according to claim 1, is characterized in that: after described elastomer (5) has assembled, had certain decrement, play the effect of closed entrance.
4. the one-way valve of plane structure according to claim 1, is characterized in that: described substrate (1), runner layer (3) and cover plate (4) are the flat board that polymethylmethacrylate makes.
5. the one-way valve of plane structure according to claim 1, is characterized in that: described elastomer (5) is for cylindrical, and material is water gel.
6. the one-way valve of plane structure according to claim 1, is characterized in that: described elastomer (5) is prepared in cover plate (4) surface by photoetching process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510231300.5A CN104896190B (en) | 2015-05-08 | 2015-05-08 | A kind of check valve of planar structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510231300.5A CN104896190B (en) | 2015-05-08 | 2015-05-08 | A kind of check valve of planar structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104896190A true CN104896190A (en) | 2015-09-09 |
| CN104896190B CN104896190B (en) | 2018-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510231300.5A Active CN104896190B (en) | 2015-05-08 | 2015-05-08 | A kind of check valve of planar structure |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606252A (en) * | 2017-08-02 | 2018-01-19 | 南京岚煜生物科技有限公司 | Passive check valve for micro-fluidic chip |
| CN113280187A (en) * | 2021-05-19 | 2021-08-20 | 哈尔滨工业大学 | Normally closed pneumatic pressure switch based on PDMS material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7607641B1 (en) * | 2006-10-05 | 2009-10-27 | Microfluidic Systems, Inc. | Microfluidic valve mechanism |
| US20100166610A1 (en) * | 2006-01-12 | 2010-07-01 | Sumitomo Bakelite Co., Ltd | Passive One-Way Valve and Microfluidic Device |
| US20110162785A1 (en) * | 2004-10-13 | 2011-07-07 | Rheonix, Inc. | Latent solvent-based microfluidic apparatus, methods, and applications |
| CN203286056U (en) * | 2013-05-31 | 2013-11-13 | 庄斌 | Phase change valve and micro-flow quantification device thereof |
-
2015
- 2015-05-08 CN CN201510231300.5A patent/CN104896190B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110162785A1 (en) * | 2004-10-13 | 2011-07-07 | Rheonix, Inc. | Latent solvent-based microfluidic apparatus, methods, and applications |
| US20100166610A1 (en) * | 2006-01-12 | 2010-07-01 | Sumitomo Bakelite Co., Ltd | Passive One-Way Valve and Microfluidic Device |
| US7607641B1 (en) * | 2006-10-05 | 2009-10-27 | Microfluidic Systems, Inc. | Microfluidic valve mechanism |
| CN203286056U (en) * | 2013-05-31 | 2013-11-13 | 庄斌 | Phase change valve and micro-flow quantification device thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107606252A (en) * | 2017-08-02 | 2018-01-19 | 南京岚煜生物科技有限公司 | Passive check valve for micro-fluidic chip |
| CN107606252B (en) * | 2017-08-02 | 2024-04-30 | 南京岚煜生物科技有限公司 | Passive one-way valve for microfluidic chip |
| CN113280187A (en) * | 2021-05-19 | 2021-08-20 | 哈尔滨工业大学 | Normally closed pneumatic pressure switch based on PDMS material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104896190B (en) | 2018-03-16 |
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