CN109027335B - Miniature one-way valve - Google Patents
Miniature one-way valve Download PDFInfo
- Publication number
- CN109027335B CN109027335B CN201811039566.XA CN201811039566A CN109027335B CN 109027335 B CN109027335 B CN 109027335B CN 201811039566 A CN201811039566 A CN 201811039566A CN 109027335 B CN109027335 B CN 109027335B
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- Prior art keywords
- containing cavity
- cavity
- way valve
- liquid
- miniature
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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
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/148—Check valves with flexible valve members the closure elements being fixed in their centre
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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
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
- F16K15/182—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism
- F16K15/1825—Check valves with actuating mechanism; Combined check valves and actuated valves with actuating mechanism for check valves with flexible valve members
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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
- F16K99/0005—Lift 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
- F16K99/0042—Electric operating means therefor
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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
Abstract
The invention discloses a miniature one-way valve. The invention relates to a group of one-way valve devices which are respectively arranged at corresponding valve ports, wherein one end of a containing cavity close to the valve port is provided with an elastic membrane, the inner wall of the containing cavity is provided with a containing cavity clapboard, the contact surface of the elastic membrane is sealed, an upper containing cavity and a lower containing cavity are communicated through a central hole of the containing cavity clapboard, the lower containing cavity is communicated with a liquid storage tank through an external runner, the liquid storage tank is filled with electric conjugate liquid, the electric conjugate liquid flows into and fills the containing cavity through the external runner, a metal circular ring is embedded in a through hole of the containing cavity clapboard, a steel needle is arranged around the metal circular ring, the steel needle and the metal circular ring are respectively connected to a high-voltage power supply through leads, an asymmetric electrode and the electric conjugate liquid form an electric field loop after the high-voltage power supply is switched on, the electric conjugate liquid flow pressure. The one-way valve has simple structure and convenient installation, and is suitable for controlling a soft robot driven by fluid.
Description
Technical Field
The invention relates to the field of soft robots or one-way valves, in particular to a miniature one-way valve.
Background
In recent years, with the continuous expansion of the application field of the robot, more severe requirements are put on the robot in special fields such as medical care, post-disaster search and rescue, complex terrain exploration and the like. Since the traditional rigid robot is difficult to show high deformation capability and adaptability to unstructured environments, various bionic soft robots are produced. The soft robot uses less or even no traditional rigid material, and mostly adopts fluid, gel, shape memory alloy and the like. Among them, fluid is a commonly used driving medium.
In the field of fluid actuation, a wide variety of valve members are often required. With the development of the soft robot towards full flexibility and miniaturization, the traditional rigid valve cannot meet the practical requirement due to the complex structure and inconvenient installation. Therefore, it is urgent to develop a new type of micro valve with low rigidity.
Disclosure of Invention
In order to meet the requirements of the fluid-driven soft robot in reality, the invention provides a micro one-way valve.
The technical scheme of the invention is as follows:
the electromagnetic valve comprises a plurality of groups of check valve devices, wherein each group of check valve devices is respectively arranged at the corresponding valve port, each group of check valve devices comprises a containing cavity, an elastic membrane, an asymmetric electric field generating device, an external flow channel and a liquid storage tank, the elastic membrane is arranged at one end of the containing cavity close to the valve port, an annular containing cavity partition plate is arranged in the middle of the inner wall of the containing cavity, the inner wall of the containing cavity is sealed with the contact surface of the containing cavity partition plate, the containing cavity is divided into an upper containing cavity and a lower containing cavity by the containing cavity partition plate, the upper containing cavity is communicated with the lower containing cavity through a central hole of the containing cavity partition plate, the lower containing cavity is communicated with the.
The asymmetric electric field generating device mainly comprises a high-voltage power supply and asymmetric electrodes, wherein the asymmetric electrodes comprise steel needles and metal rings, the metal rings are embedded in through holes of a partition plate of the containing cavity, the steel needles are arranged around the metal rings, the steel needles and the metal rings are respectively used as anodes and cathodes and are connected to the high-voltage power supply through leads, the asymmetric electrodes and electric conjugate liquid form an electric field loop after the high-voltage power supply is switched on, the electric conjugate liquid in the lower containing cavity flows to the containing cavity through a central hole of the metal rings, the electric conjugate liquid generates liquid flowing pressure in the flowing process, and the elastic membrane deforms under the liquid flowing pressure and is in contact with and pressed against a valve port, so that the valve port is controlled to be closed.
The pressure of the liquid storage tank can be adjusted by injecting compressed air, and the initial shape of the elastic membrane is adjusted according to the pressure change of the liquid storage tank.
Preferably, the high-voltage power supply is an external power supply or a micro power supply arranged inside the valve body.
Preferably, the chamber partition is fixed in the cavity or axially moves along the inner wall of the chamber.
Preferably, the electric conjugate liquid is replaced by other intelligent liquid.
Preferably, the working pressure of the miniature one-way valve can be changed by adjusting the distance between the steel needle and the metal ring.
Preferably, the diameter of the elastic membrane is smaller than or equal to the diameter of the cavity, and the elastic membrane is hermetically arranged on the outer end face of the cavity through a pasting or clamping tool.
Preferably, the cavity is a flexible body or an elastomer.
Preferably, the lower cavities of each group of one-way valve devices are communicated with each other and are connected to the liquid storage tank together to form a plurality of groups of one-way valve devices connected in parallel.
The invention has the following beneficial effects:
1) the one-way valve of the invention has reduced integral rigidity and is suitable for controlling a soft robot driven by fluid.
2) The invention has simple structure, convenient installation and wide applicable working environment.
Drawings
FIG. 1 is a schematic view of a set of micro check valves;
FIG. 2 is a schematic view of the flow of an electric conjugate according to the present invention;
FIG. 3 is a schematic diagram of a plurality of micro check valves connected in parallel.
In fig. 1: 1 is lower appearance chamber, 2 is appearance chamber baffle, 3 is upper appearance chamber, 4 is the elastic membrane, 5 is the valve port, 6 is the metal ring, 7 is the steel needle, 8 is the electricity conjugate liquid, 9 is external runner, 10 is the liquid reserve tank.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments. The embodiment described in the drawings is only one embodiment of the invention and not all embodiments. All other embodiments that can be obtained by a person skilled in the art based on the embodiments of the present invention without any inventive step are within the scope of the present invention.
As shown in fig. 1 and 2, each set of check valve device includes a cavity for accommodating a liquid medium and maintaining a pressure difference generated by liquid flow, an elastic membrane 4 for controlling opening and closing of a valve port by pressure deformation, an asymmetric electric field generating device, an external flow channel 9 and a liquid storage tank 10, wherein the elastic membrane 4 is installed at one end of the cavity close to the valve port 5, an annular cavity partition plate 2 is arranged in the middle of the inner wall of the cavity, the inner wall of the cavity is sealed with a contact surface of the cavity partition plate 2, the cavity is divided into an upper cavity 3 and a lower cavity 1 by the cavity partition plate 2, the upper cavity 3 is communicated with the lower cavity 1 through a central hole of the cavity partition plate 2, and both the two cavities have enough strength to bear the liquid pressure, the lower cavity 1 is communicated with the liquid storage tank 10 through the external flow channel 9, an electric conjugate liquid 8 is contained.
The asymmetric electric field generating device mainly comprises a high-voltage power supply and asymmetric electrodes, wherein the asymmetric electrodes comprise steel needles 7 and metal rings 6, the metal rings 6 are embedded in through holes of a cavity partition plate 2, the steel needles 7 are arranged around the metal rings 6, the steel needles 7 and the metal rings 6 are respectively used as anodes and cathodes and are connected to the high-voltage power supply through conducting wires, the asymmetric electrodes and electric conjugate liquid 8 form an electric field loop after being connected with the high-voltage power supply, the electric conjugate liquid 8 in the lower cavity 1 flows to the upper cavity 3 through a central hole of the metal rings 6, the electric conjugate liquid 8 generates liquid flowing pressure in the flowing process, the elastic membrane 4 deforms under the liquid flowing pressure and is in contact with and pressed against the valve port 5, and therefore the valve port 5 is controlled to be closed.
As shown in fig. 3, the present invention includes a plurality of sets of check valve devices, each set of check valve devices is respectively disposed at the corresponding valve port 5, and the lower cavities of each set of check valve devices are communicated with each other and commonly connected to the liquid storage tank to form a plurality of sets of check valve devices connected in parallel.
In a specific embodiment, the pressure of the reservoir 10 may be adjusted by injecting compressed air, and the initial shape of the elastic membrane 4 may be adjusted according to the pressure change of the reservoir 10.
In specific implementation, the high-voltage power supply is an external power supply or a micro power supply arranged in the valve body.
In specific implementation, on the premise of ensuring sealing, the cavity partition plate 2 is fixed in the cavity or axially moves along the inner wall of the cavity.
In specific implementation, the electric conjugate liquid 8 is replaced by other intelligent liquid.
In specific implementation, the working pressure of the micro one-way valve can be changed by adjusting the distance between the steel needle 7 and the metal ring.
In specific implementation, the diameter of the elastic membrane 4 is smaller than or equal to the diameter of the cavity, and the elastic membrane 4 is hermetically mounted on the outer end face of the cavity through a pasting or clamping tool.
In a specific implementation, the cavity is a flexible body or an elastic body.
The working process of the invention is as follows:
the high-voltage power supply is switched on, and under the action of the non-uniform electric field, as the partition plate and the wall of the cavity are sealed, the electric conjugate liquid 8 in the lower cavity 1 can only flow to the upper cavity 3 through the metal ring 6, the pressure of the upper cavity is increased due to the liquid flow, and then the elastic membrane 4 deforms and protrudes to close the valve port 5. Wherein, the lower chamber 1 is communicated with an electric conjugate liquid storage tank 10 through an external flow passage 9. At this time, the liquid outside the cavity cannot enter the valve port 5 due to the elastic membrane 4 closing the valve port 5, but the liquid in the valve port 5 can flow into the periphery of the cavity under the condition that the hydraulic pressure is greater than that in the cavity, so that unidirectional flow is formed.
When the power supply is cut off, under the extrusion action of the elastic membrane, the liquid in the upper cavity 3 flows back to the lower cavity 1 through the central hole of the metal ring and flows back to the storage tank 10 through the external flow passage 9.
As shown in fig. 1, the flat membrane is spaced from the valve port by a distance d, which determines the minimum amount of deformation required for the membrane to close the valve port. The amount of deformation of the elastic membrane directly reflects the pressure in the upper chamber. In specific implementation, the elastic membrane may be made of other materials that are easily deformed under pressure, whether by axial deformation or radial deformation, as long as the valve port can be effectively sealed.
The minimum deformation of the elastic membrane for closing the valve port depends on the distance d between the elastic membrane and the valve port, and the corresponding minimum pressure is Pm。
Pressure P of upper chamber 33Dependent on reservoir pressure P10And pressure P generated by the flow of the electric conjugate liquideI.e. P3＝P10+Pe。
Therefore, the working pressure of the micro one-way valve is Pw＝P10+Pe-Pm。
The working pressure can be adjusted in a number of ways:
(1) regulating P10. Since the reservoir is a pressurizable sealed tank, the reservoir pressure can be adjusted by injecting compressed air. The reservoir pressure determines the initial shape of the elastic membrane.
(2) Regulating Pe. Under the premise of electrical conjugate solution model selection and two-electrode structure parameter determination, the working pressure can be changed by adjusting the power supply voltage U and the distance l between the two electrodes. Wherein the distance between the two electrodes can be adjusted by changing the position of the steel nail or the metal ring.
(3) Regulating Pm. On the premise of determining the selection of the elastic membrane, the distance d between the elastic membrane and the valve port can be changed for adjustment.
The above-mentioned contents further explain the object, technical scheme and beneficial effect of the present invention. The above description is only for the specific embodiments of the present invention and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A miniature check valve which characterized in that: comprises a plurality of groups of check valve devices, each group of check valve devices is respectively arranged at the corresponding valve port (5), each group of check valve devices comprises a containing cavity and an elastic membrane (4), the device comprises an asymmetric electric field generating device, an external flow channel (9) and a liquid storage tank (10), wherein an elastic membrane (4) is installed at one end, close to a valve port (5), of a containing cavity, an annular containing cavity partition plate (2) is arranged in the middle of the inner wall of the containing cavity, the inner wall of the containing cavity is sealed with a contact surface of the containing cavity partition plate (2), the containing cavity is divided into an upper containing cavity (3) and a lower containing cavity (1) by the containing cavity partition plate (2), the upper containing cavity (3) is communicated with the lower containing cavity (1) through a central hole of the containing cavity partition plate (2), the lower containing cavity (1) is communicated with the liquid storage tank (10) through the external flow channel (9), electric conjugate liquid (8) is contained in the liquid storage tank (;
the asymmetric electric field generating device mainly comprises a high-voltage power supply and asymmetric electrodes, wherein the asymmetric electrodes comprise steel needles (7) and metal circular rings (6), the metal circular rings (6) are embedded in through holes of a cavity partition plate (2), the metal circular rings (6) are arranged around the steel needles (7), the steel needles (7) and the metal circular rings (6) are respectively used as anodes and cathodes and are connected to the high-voltage power supply through leads, the asymmetric electrodes and electric conjugate liquid (8) jointly form an electric field loop after being connected with the high-voltage power supply, the electric conjugate liquid (8) in the lower cavity (1) flows to the upper cavity (3) through a central hole of the metal circular rings (6), the electric conjugate liquid (8) generates liquid flowing pressure in the flowing process, and the elastic membrane (4) deforms under the liquid flowing pressure and is contacted and pressed with the valve port (5), so that the valve port (5) is controlled to be closed;
the working pressure of the miniature one-way valve can be changed by adjusting the distance between the steel needle (7) and the metal ring.
2. A miniature one-way valve as claimed in claim 1, wherein: the pressure of the liquid storage tank (10) can be adjusted by injecting compressed air, and the initial shape of the elastic membrane (4) is adjusted according to the pressure change of the liquid storage tank (10).
3. A miniature one-way valve as claimed in claim 1, wherein: the high-voltage power supply is an external power supply or a micro power supply arranged in the valve body.
4. A miniature one-way valve as claimed in claim 1, wherein: the cavity clapboard (2) is fixed in the cavity or moves along the axial direction of the inner wall of the cavity.
5. A miniature one-way valve as claimed in claim 1, wherein: the electric conjugate liquid (8) is replaced by other intelligent liquid.
6. A miniature one-way valve as claimed in claim 1, wherein: the diameter of the elastic membrane (4) is smaller than or equal to that of the cavity, and the elastic membrane (4) is hermetically arranged on the outer end face of the cavity through a pasting or clamping tool.
7. A miniature one-way valve as claimed in claim 1, wherein: the containing cavity is a flexible body or an elastic body.
8. A miniature one-way valve as claimed in claim 1, wherein: the lower cavities of each group of one-way valve devices are mutually communicated and are commonly connected to the liquid storage tank to form a plurality of groups of one-way valve devices which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811039566.XA CN109027335B (en) | 2018-09-06 | 2018-09-06 | Miniature one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811039566.XA CN109027335B (en) | 2018-09-06 | 2018-09-06 | Miniature one-way valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109027335A CN109027335A (en) | 2018-12-18 |
| CN109027335B true CN109027335B (en) | 2020-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811039566.XA Active CN109027335B (en) | 2018-09-06 | 2018-09-06 | Miniature one-way valve |
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| CN (1) | CN109027335B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113007385B (en) * | 2021-03-16 | 2022-03-04 | 山东大学 | Soft switching valve with bistable state and adjustable middle position |
| CN115069317B (en) * | 2022-06-23 | 2023-12-29 | 浙大城市学院 | Micro-droplet control device |
| CN115445680B (en) * | 2022-11-11 | 2023-03-24 | 杭州毫厘科技有限公司 | Micro-fluidic valve and micro-fluidic device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8048386B2 (en) * | 2002-02-25 | 2011-11-01 | Cepheid | Fluid processing and control |
| US6685442B2 (en) * | 2002-02-20 | 2004-02-03 | Sandia National Laboratories | Actuator device utilizing a conductive polymer gel |
| US20090115285A1 (en) * | 2007-10-08 | 2009-05-07 | Khalil Najafi | Liquid-gap electrostatic hydraulic micro actuators |
| CN101352669B (en) * | 2007-11-14 | 2010-12-08 | 中国科学院大连化学物理研究所 | Multichannel electrode with same variable electric field force |
| CN101709789A (en) * | 2009-11-19 | 2010-05-19 | 复旦大学 | Optical driving micro valve and driving method thereof |
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2018
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| CN109027335A (en) | 2018-12-18 |
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