CN108252901B - Adjustable flow pump - Google Patents
Adjustable flow pump Download PDFInfo
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- CN108252901B CN108252901B CN201711303286.0A CN201711303286A CN108252901B CN 108252901 B CN108252901 B CN 108252901B CN 201711303286 A CN201711303286 A CN 201711303286A CN 108252901 B CN108252901 B CN 108252901B
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- flow channel
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- 239000012530 fluid Substances 0.000 claims abstract description 107
- 230000001105 regulatory effect Effects 0.000 claims abstract description 49
- 239000012528 membrane Substances 0.000 claims abstract description 42
- 238000005086 pumping Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000000499 gel Substances 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 5
- 238000012123 point-of-care testing Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001647 drug administration Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007721 medicinal effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
Landscapes
- Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
An adjustable flow pump comprising: the flow channel is used for conveying fluid, and the front and the back of the flow channel are respectively connected with a fluid inlet and a fluid outlet; a pumping unit configured to compress fluid in at least a first position within the flow passage such that the fluid is pumped out of the fluid outlet; a flow regulating membrane disposed in the flow passage, forming part of the flow passage, and located between the fluid outlet and the first location, and having a resiliency configured to be pressed against the flow passage when pressurized to further regulate the fluid flow upon pumping. The flow pump provided by the invention can not reduce the flow regulation precision through the pumping unit, and can change the average value of the working flow range through the deformation of the flow regulation membrane.
Description
Technical Field
The invention relates to the field of fluid delivery, the field of biomedical detection and an adjustable flow pump.
Background
The flow pump is a commonly used fluid pumping device, can provide stable flow supply, and has wide application in industry, agriculture, medical treatment and scientific research. In recent years, with the rapid development of point-of-CARE TESTING (POCT) systems, high requirements are being put on micro-accurate pumping of fluid pumps, portability, low cost and the like.
The conventional micropump is used for long-time micro-drug administration in intensive care units and has an important medical effect. However, the device is not easy to carry, and has a small flow adjustment range. Such micropumps typically have a liquid intake rate of milliliters per hour (ml/h), whereas in POCTs, the typical flow rates are in the microliter per hour (μl/h) scale, thus placing higher demands on micropump liquids.
For such small feed rates, threaded motor-driven push-plus-syringe approaches are currently common. This approach allows for accurate, micro, uniform and continuous delivery of small amounts of fluid. But the problems of larger equipment, longer reaction time and the like exist at the same time, and the POCT is generally required to be externally connected with a power supply, is not easy to carry and is unfavorable for the application of POCT.
Disclosure of Invention
Accordingly, an object of the present invention is to provide an adjustable flow pump, which solves at least some of the above-mentioned problems.
According to an aspect of the present invention, there is provided an adjustable flow pump comprising:
the flow channel is used for conveying fluid, and the front and the back of the flow channel are respectively connected with a fluid inlet and a fluid outlet;
a pumping unit configured to compress fluid in at least a first position within the flow passage such that the fluid is pumped out of the fluid outlet;
A flow regulating membrane disposed in and forming part of the flow passage and positioned between the fluid outlet and the first location, and having a resiliency configured to be pressed against the flow passage when pressurized to further regulate the fluid flow upon pumping.
In further embodiments, the pumping unit is a piston-rod structure, a piezoelectric sheet, an alternating positive and negative pressure supply unit, or a threaded screw mechanism.
In a further embodiment, the piston connecting rod structure comprises a rotor, a connecting rod, a piston joint and a piston, wherein a piston connecting hole is formed in the flow channel, and the piston is tightly matched in the piston connecting hole and can move along the vertical direction of the flow channel; the piston is sleeved on one end of the piston joint; the other end of the piston connector is movably connected with one end of the connecting rod, so that the movement of the connecting rod drives the piston connector and the piston to reciprocate in the piston connecting hole; the rotor is movably connected with the other end of the connecting rod, and the rotor is configured to be connected with a motor and used for transmitting the rotation of the motor to the connecting rod so as to enable the connecting rod to move.
In a further embodiment, a pneumatic connection hole is further included, one end of which is connected to one side of the flow regulating membrane, and the other end is configured to be connected to a pressure generating device, through which the flow regulating membrane is pressurized when the pressure generating device generates pressure.
In a further embodiment, a motor mount is also included for supporting the motor.
In a further embodiment, the material of the flow regulating membrane is a fluorine gel, a silica gel or a nitrile rubber.
In a further embodiment, a first one-way valve is also included, the first one-way valve being disposed between the first location and the flow regulating membrane for one-way communication of the fluid.
In a further embodiment, the fluid flow control device further comprises a second one-way valve arranged between the fluid inlet in the flow channel and the first position, wherein the direction of the second one-way valve for communicating the fluid is the same as that of the first one-way valve.
In a further embodiment, the first and second one-way valves each have a tapered head in a direction towards the fluid outlet, preferably the tapered head having a taper angle within 110 °.
According to another aspect of the present invention, there is also provided an adjustable flow pump comprising:
A fluid layer comprising: the fluid inlet and the fluid outlet are respectively connected with the front part and the rear part of the flow channel; a flow rate adjusting film disposed in the flow channel and forming a part of the flow channel; a first one-way valve for one-way communication of the fluid from the fluid inlet to the fluid outlet; the direction of the fluid conduction of the second one-way valve is the same as that of the first one-way valve;
A junction layer disposed over a fluid layer, comprising: a pneumatic connection hole having one end connected to one side of the flow regulating membrane and the other end configured to be connected to a pressure generating device, through which the flow regulating membrane is pressed to be pressed against the flow path when the pressure generating device generates pressure; the piston connecting hole is formed in a first position on the flow channel, the first one-way valve is arranged between the first position in the flow channel and the flow regulating membrane, and the second one-way valve is arranged between the fluid inlet in the flow channel and the first position;
A control layer over the connection layer, comprising: the rotor, the connecting rod, the piston connector and the piston are tightly matched and placed in the piston connecting hole, and can move along the vertical direction of the flow channel; the piston is sleeved on one end of the piston joint; the other end of the piston connector is movably connected with one end of the connecting rod, so that the movement of the connecting rod drives the piston connector and the piston to reciprocate in the piston connecting hole; the rotor is movably connected with the other end of the connecting rod, and the rotor is configured to be connected with a motor and used for transmitting the rotation of the motor to the connecting rod so as to enable the connecting rod to move.
In a further embodiment, the fluid outlet is configured to be connected to a microfluidic chip.
The adjustable flow pump provided by the invention has the following beneficial effects:
The adjustable flow pump can change the average value of the working flow range through the deformation of the flow regulating film while not reducing the flow regulating precision through the pumping unit, thereby overcoming the defect of small working range;
The adjustable flow pump is placed in the same direction through the two check valves with simple structures, so that the fluid is transported in a one-way reliable and stable way.
The control layer which is most easy to fail of the adjustable flow pump can be detached and replaced, and the connecting layer and the fluid layer with long service life can be reused, so that the adjustable flow pump is energy-saving and environment-friendly;
The motor connected with the rotor can be replaced according to the requirements, and the working range and the working precision can be flexibly changed.
Drawings
Fig. 1 is a schematic diagram of an adjustable flow pump according to an embodiment of the invention.
Fig. 2 is an exploded view of an adjustable flow pump structure according to an embodiment of the invention.
FIG. 3 is a flow path cross-sectional view of an adjustable flow pump structure according to an embodiment of the present invention.
Fig. 4 is a cross-sectional view of an adjustable flow pump according to an embodiment of the invention.
Fig. 5A and 5B are perspective views and cross-sectional views of a check valve of an adjustable flow pump according to an embodiment of the present invention.
Reference numerals illustrate:
10. Control layer
101. Motor support
102. Piston connecting rod structure
1021. Rotor
1022. Connecting rod
1023. Piston joint
1024. Piston
20. Connection layer
201. Support connecting hole
202. Piston connecting hole
203. Pneumatic connecting hole
30. Fluid layer
301. Fluid inlet
302. Flow passage
303. One-way valve
304. Flow regulating membrane
305. Fluid outlet
Detailed Description
The present invention will be further described in detail below with reference to specific embodiments and with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
In the present specification, the terms "include" and "comprise," as well as derivatives thereof, are intended to be inclusive rather than limiting.
In this specification, the various embodiments described below for the purpose of describing the principles of the present invention are illustrative only and should not be construed in any way as limiting the scope of the disclosure. The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention defined by the claims and their equivalents. The following description includes numerous specific details to aid in understanding, but these details should be construed as exemplary only. Accordingly, those of ordinary skill in the art will recognize that many changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness. Furthermore, the same reference numbers will be used throughout the drawings to refer to the same or like functions and operations. Furthermore, while arrangements having different features may be described in different embodiments, those skilled in the art will appreciate that: all or part of the features of the different embodiments may be combined to form new embodiments without departing from the spirit and scope of the invention.
The use of ordinal numbers such as "first," "second," and the like in this specification to modify a component such as a one-way valve in a different position does not itself include or represent any preceding ordinal number for the corresponding component or the like, nor does it represent the order of a component or the like from another component or the like, and is used only to make a component or the like having a certain name clearly distinguishable from another component or the like having the same name.
According to the basic idea of the invention, there is provided an adjustable flow pump comprising: a flow passage for conveying fluid, and a fluid inlet and a fluid outlet respectively connected with the front and the back of the flow passage; a pumping unit configured to compress fluid in at least a first position within the flow passage such that the fluid is pumped to the fluid outlet; and a flow regulating membrane disposed in and forming part of the flow passage and positioned between the fluid outlet and the first location, having a resiliency configured to be pressed against the flow passage when pressurized to further regulate the fluid flow upon pumping. The average value of the working flow range can be changed through the deformation of the flow regulating membrane while the flow regulating precision is not reduced through the pumping unit, and the defect of small working range is overcome.
As for the pumping unit, it may be various structures which are already known in the art and capable of compressing fluid in the flow channel to deliver fluid to the fluid outlet, including but not limited to a piezoelectric sheet, a piston rod structure, a positive and negative pressure alternating supply unit, or a screw mechanism. The embodiments of the present invention are described in detail with respect to the piston rod structure, but those skilled in the art will appreciate that the specific structures of the various parts of the adjustable flow pump described below may be combined with other types of pumping units.
Fig. 1 is a schematic diagram of an adjustable flow pump according to an embodiment of the invention. As shown in fig. 1, the adjustable flow pump according to an embodiment of the present invention includes a flow channel 302 for delivering a fluid, and a fluid inlet 301 and a fluid outlet 305 in communication with the flow channel; a pumping unit (e.g., piston-rod structure 102, hereinafter referred to as piston-rod structure unless otherwise specified) configured to compress fluid in at least a first position within the flow channel 302 such that the fluid is pumped along the flow channel 302 to the fluid outlet 305; a flow regulating membrane 304 disposed in the flow channel 302, forming part of the flow channel (for example, the flow channel is provided with a hole, the flow regulating membrane may cover the hole; or the flow channel 302 and the flow regulating membrane 304 are integrally formed by 3D printing), and disposed between the fluid outlet 305 and the first position, and having elasticity, configured to be pressed against the flow channel 302 when pressed, so as to further regulate the fluid flow rate during pumping, the disposed position of the flow regulating membrane 304 may be referred to as a second position.
For the pumping unit, the present embodiment is described with reference to the piston rod structure 102, and the piston rod structure 102 can suck the fluid in the extruding flow channel 302 by using the reciprocating motion of the piston, thereby realizing the fluid delivery.
The flow channel 302 is a passage through which fluid flows, and a portion of the flow channel 302 may be formed by a pumping unit and/or a flow regulating membrane, or a portion of a component, or a portion of a part of the member so that the entire passageway is in a closed configuration. The flow channel 302 may comprise a plurality of passages, which may be an inlet-to-outlet, or a plurality of inlet-to-outlet, preferably an inlet-to-outlet.
In some embodiments, the flow regulating membrane 304 may be provided in a plurality, such as spaced apart on the flow path between the first location and the fluid outlet, preferably equally spaced apart. Correspondingly, the flow channel 302 may be provided with a plurality of pneumatic connecting holes 203 (i.e. the holes) to cooperate with the plurality of flow regulating films 304, and the flow regulating films 304 may be adhered to and cover the pneumatic connecting holes 203.
In some embodiments, the material of the flow regulating membrane 304 may be various elastic materials that deform under pressure as known in the art, and that apply resistance to the fluid in the flow channel after being pressed by external pressure, thereby slowing down the pumping of the fluid by the pumping unit to reduce the flow range average without reducing the flow regulating accuracy; preferably, the material can be fluorine rubber, silica gel or nitrile rubber which is corrosion resistant, long in service life and low in cost.
In some embodiments, the piston rod structure 102 may include a rotor 1021, a connecting rod 1022, a piston joint 1023, and a piston 1024, where the flow channel is provided with a piston connecting hole 202 (the position of the piston connecting hole 202 is the first position), where the piston connecting hole has a hole depth that can accommodate the piston to perform vertical movement, and the piston 1024 is tightly fit in the piston connecting hole 202 (where, to ensure tightness, the size of the piston 1024 is slightly larger than the size of the piston connecting hole 202, that is, tightly fit), and can move along the vertical direction of the flow channel 302; piston 1024 is sleeved on one end of piston joint 1023; the other end of the piston joint 1023 is movably connected (e.g., a snap-fit connection or a loop bar connection) with one end of the connecting rod 1022, such that movement of the connecting rod 1022 drives the piston joint 1023 and the piston 1024 to reciprocate within the piston connecting hole 202; the rotor 1021 is movably connected to the other end of the link 1022 (e.g., one end of the link is movably sleeved on a protruding member of the rotor 1021), and the shaft of the rotor 1021 is configured to be connected to a motor for transmitting rotation of the motor to the link 1022, so that the link 1022 moves, and correspondingly, the shaft can be transmitted to the piston joint 1023, so that the piston joint 1023 and the piston 1024 reciprocate in the piston connecting hole 202.
In some embodiments, the adjustable flow pump further comprises a pneumatic connection hole 203, one end of which is connected to one side of the flow regulating membrane 304 (the pneumatic connection hole 203 is connected to the flow regulating membrane 304 in an airtight manner to prevent gas from leaking out of the connection between the two), and the other end of the pneumatic connection hole 203 is configured to be connected to a pressure generating device (such as a gas cylinder containing a gas valve), and when the pressure generating device generates pressure, the pneumatic connection hole 203 is used to press the flow regulating membrane 304 to press against a flow channel on the other side of the flow regulating membrane, so as to increase the fluid resistance, thereby regulating the flow.
In some embodiments, the adjustable flow pump further comprises a motor support 101 for supporting the motor. Correspondingly, the adjustable flow pump further comprises a support connecting hole 201 for limiting the motor support 101. The motor support 101 may be a removable motor support.
As shown in fig. 2 to 4, the adjustable flow pump may further include a first check valve 3031, where the first check valve 3031 is disposed between the piston connection hole (i.e., the first position) 202 and the flow adjustment membrane 304, for unidirectional fluid communication.
In a further embodiment, the adjustable flow pump may further comprise a second check valve 3032, the second check valve 3032 being disposed between the fluid inlet 301 and the piston connection hole 202, the second check valve 3032 conducting fluid in the same direction as the first check valve 3031.
In a further embodiment, the first check valve 3031 and the second check valve 3032 each have a tapered head in the direction of the fluid outlet, preferably said tapered heads having a taper angle within 110 °. As shown in fig. 5A and 5B, the unidirectional valve realizes unidirectional conduction performance by using deformation of the conical head, two normally-closed membrane flaps are arranged on the conical head of the unidirectional valve, and when the water flows out from the conical head, the membrane flaps are opened and the flow channel is conducted; when the water flows in from the conical head, the valve is in a closed state, and the flow channel is not conducted. Through tests, the included angle of the conical head part is within 110 degrees, and good forward conductivity and reverse cut-off can be realized. The outlet of the one-way valve head part is in a rectangular section with small width, so that the reverse stop can be realized when the external pressure of the conical head part is slightly higher than the internal pressure of the conical head part.
In some embodiments, the pressure generating device and the motor are configured to be electrically connected to a controller, the controller can control the two to work simultaneously, the rotation of the motor is realized, the fluid is pumped to the fluid outlet, the air pressure delivered by the pressure generating device causes the flow regulating membrane 304 to squeeze the fluid in the flow channel, the flow range is regulated, and the flow can be regulated within the set range of the flow regulating membrane by changing the rotation speed of the motor.
As shown in fig. 2 and 4, the adjustable flow pump according to the embodiment of the present application may be a layered structure. The following are specific hierarchical embodiments, which are merely illustrative of the present application and should not be construed as limiting the application.
The adjustable flow pump shown in fig. 2 and 4 may include a fluid layer 30, a tie layer 20, and a control layer 10 structure.
Wherein the fluid layer 30 comprises: a flow channel 302 for fluid flow, a fluid inlet 301 and a fluid outlet 305; the fluid layer further includes a flow regulating membrane 304 disposed in the flow channel 302, forming a portion of the flow channel; a one-way valve 303 may also be included, in a specific arrangement as described with reference to the previous embodiments.
Wherein the tie layer 20 is located above the fluid layer, comprising: a pneumatic connection hole 203 having one end connected to one side of the flow regulating membrane and the other end configured to be connected to a pressure generating device, through which the flow regulating membrane is pressed to be pressed against the flow path when the pressure generating device generates pressure; a piston connecting hole 202 formed in the flow path;
The control layer 10 is positioned above the connecting layer 20 and comprises a rotor 1021, a connecting rod 1022, a piston joint 1023 and a piston 1024, wherein the piston 1024 is tightly matched and placed in the piston connecting hole 202 and can move along the vertical direction of the flow channel; the piston 1024 is sleeved on one end of the piston connector 1023; the other end of the piston joint 1023 is movably connected with one end of the connecting rod 1022, so that the movement of the connecting rod 1022 drives the piston joint 1023 and the piston 1024 to reciprocate in the piston connecting hole 202; the rotator 1021 is movably coupled to the other end of the link 1022, and the rotator 1021 is configured to be coupled to a motor for transmitting rotation of the motor to the link 1022 to move the link 1022.
In some examples, the control layer further comprises a motor support 101 for supporting the motor; the connection layer includes a support connection hole 201 through which the motor support 101 is fixed.
For the adjustable flow pump of the embodiments described in fig. 2 and 4, the method of use may be as follows:
1. the motor is fitted into the motor support 101.
2. The piston connecting rod structure 102 is connected to the motor rotor.
3. Aligning and inserting motor mount 101 into mount connection hole 201, aligning and inserting piston 1024 into piston connection hole 202, connecting control layer 10 with connection layer 20, and adding lubricating fluid for lubrication when piston 1024 is inserted into connection with piston connection hole 202.
4. The pressure generating device is connected to the pneumatic connection hole 203 through a pipe.
5. A fluid source is connected to the flow channel through a fluid inlet 301.
6. The fluid outlet 305 is connected to a downstream device, such as a microfluidic chip.
7. The supply pressure of the pressure generating device is regulated, and the flow regulating film generates preset deformation, so that the working range of the adjustable flow pump meets the use requirement.
8. And starting the motor, adjusting the rotating speed of the motor, and changing the flow.
The adjustable flow pump provided by the embodiment of the invention can realize accurate and continuous flow supply, can change the flow by adjusting the rotating speed of the motor, and can change the flow resistance in a flow path by a pneumatic flow adjusting film, thereby ensuring the adjusting precision and changing the change range of the flow.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the invention thereto, but to limit the invention thereto, and any modifications, equivalents, improvements and equivalents thereof may be made without departing from the spirit and principles of the invention.
Claims (11)
1. An adjustable flow pump, comprising:
the flow channel is used for conveying fluid, and the front and the back of the flow channel are respectively connected with a fluid inlet and a fluid outlet;
The flow channel is provided with a piston connecting hole, and the position of the piston connecting hole is a first position;
A pumping unit configured to compress fluid in at least the first position within the flow passage such that the fluid is pumped out of the fluid outlet;
The pumping unit comprises a piston connecting rod structure, wherein the piston connecting rod structure comprises a rotor, a connecting rod, a piston joint and a piston; the piston is tightly matched in the piston connecting hole and can move along the vertical direction of the flow channel;
a flow regulating membrane disposed in the flow passage, forming part of the flow passage, and located between the fluid outlet and the first location, and having a resiliency configured to be pressed against the flow passage when pressurized to further regulate the fluid flow upon pumping.
2. The adjustable flow pump of claim 1 wherein,
The piston is sleeved on one end of the piston joint;
the other end of the piston connector is movably connected with one end of the connecting rod, so that the movement of the connecting rod drives the piston connector and the piston to reciprocate in the piston connecting hole;
the rotor is movably connected with the other end of the connecting rod, and the rotor is configured to be connected with a motor and used for transmitting the rotation of the motor to the connecting rod so as to enable the connecting rod to move.
3. The adjustable flow pump of claim 2, further comprising a pneumatic connection hole having one end connected to one side of the flow regulating membrane and the other end configured to be connected to a pressure generating device through which the flow regulating membrane is pressurized when the pressure generating device generates pressure.
4. The adjustable flow pump of claim 2 further comprising a motor mount for supporting the motor.
5. The adjustable flow pump of claim 1, wherein the flow regulating membrane is made of a fluoro-gel, a silica gel or a nitrile rubber.
6. The adjustable flow pump of claim 1 further comprising a first one-way valve disposed within the flow path between the first position and the flow regulating membrane for one-way communication of the fluid in a direction from the first position to the flow regulating membrane.
7. The adjustable flow pump of claim 6 further comprising a second one-way valve disposed in the flow path between the fluid inlet and the first position, the second one-way valve directing fluid in the same direction as the first one-way valve.
8. The adjustable flow pump of claim 6 wherein the first and second one-way valves each have a tapered head in a direction toward the fluid outlet.
9. The adjustable flow pump of claim 8 wherein the taper angle of the tapered head is within 110 °.
10. An adjustable flow pump, comprising:
A fluid layer comprising:
The fluid inlet and the fluid outlet are respectively connected with the front part and the rear part of the flow channel;
a flow regulating membrane disposed in the flow channel, forming a portion of the flow channel, and located between the fluid outlet and the first location;
A first one-way valve for one-way communication of the fluid from the fluid inlet to the fluid outlet;
the direction of the fluid conduction of the second one-way valve is the same as that of the first one-way valve;
A tie layer, located above the fluid layer, comprising:
A pneumatic connection hole having one end connected to one side of the flow regulating membrane and the other end configured to be connected to a pressure generating device, through which the flow regulating membrane is pressed to be pressed against the flow path when the pressure generating device generates pressure;
The piston connecting hole is formed in the flow channel, and the forming position of the piston connecting hole is the first position; the first one-way valve is arranged between a first position in the flow channel and the flow regulating membrane, and the second one-way valve is arranged between a fluid inlet in the flow channel and the first position;
A control layer over the connection layer, comprising:
The rotor, the connecting rod, the piston connector and the piston are tightly matched and placed in the piston connecting hole, and can move along the vertical direction of the flow channel; the piston is sleeved on one end of the piston joint; the other end of the piston connector is movably connected with one end of the connecting rod, so that the movement of the connecting rod drives the piston connector and the piston to reciprocate in the piston connecting hole; the rotor is movably connected with the other end of the connecting rod, and the rotor is configured to be connected with a motor and used for transmitting the rotation of the motor to the connecting rod so as to enable the connecting rod to move.
11. The adjustable flow pump of claim 1 or 10, wherein the fluid outlet is configured to be connected to a microfluidic chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711303286.0A CN108252901B (en) | 2017-12-08 | 2017-12-08 | Adjustable flow pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711303286.0A CN108252901B (en) | 2017-12-08 | 2017-12-08 | Adjustable flow pump |
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| CN108252901A CN108252901A (en) | 2018-07-06 |
| CN108252901B true CN108252901B (en) | 2024-04-19 |
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| CN108252901A (en) | 2018-07-06 |
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