CN207989278U

CN207989278U - Adjusting flow pumps

Info

Publication number: CN207989278U
Application number: CN201721705552.8U
Authority: CN
Inventors: 嵇庆磊; 刘莹; 段慧玲; 张家铭
Original assignee: Peking University
Current assignee: Peking University
Priority date: 2017-12-08
Filing date: 2017-12-08
Publication date: 2018-10-19
Anticipated expiration: 2027-12-08

Abstract

A kind of adjusting flow pump, including：For the runner of trandfer fluid, it is connected to fluid inlet and fluid outlet respectively before and after runner；Pumping unit is configured in compressible runner at least fluid of first position, fluid is made to be pumped from fluid outlet；Flow-rate adjustment film, is set in runner, constitutes a part for runner, and between fluid outlet and the first position, has elasticity, is configured to that the runner can be pressed to when being pressurized, fluid flow when pumping with further adjusting.The flow pump of the utility model while not reducing flow-rate adjustment precision, can also change the average value of operating flow range by pumping unit by the deformation of flow-rate adjustment film.

Description

Adjusting flow pumps

Technical field

The utility model is related to field of fluid, further relate to biologic medical detection field, further to a kind of adjustable Formula flow pump.

Background technology

Flow pump is a kind of common fluid pumping equipment, stable flow supply can be provided, in industry, agricultural, doctor It treats and has a wide range of applications in scientific research.In recent years, with instant detection (point-of-care testing, POCT) system Rapid development, higher requirement is proposed to the micro accurate pump liquid of flow pump, portable, of low cost etc..

Traditional micro pump is used for long-time micro-administration in Intensive Care Unit, and there is important medical treatment to make With.But there is also it is not portable, flow adjustment range is small the problems such as.The feed liquor rate of such micro pump is generally milliliter/small When (ml/h), and in POCT, common flow is micro- l/h of (μ l/h) rank, therefore proposes higher to micro pump liquid Requirement.

For so small feed liquor rate, the mode for being electric-only propulsion filling emitter frequently with screw thread at present carries out.Which It may be implemented that a small amount of fluid is accurate, micro, uniform constantly to be exported.But it is larger that there is also equipment simultaneously, and the reaction time is longer The problems such as, and external power supply is generally required, and it is not portable, it is unfavorable for the application of POCT.

Utility model content

In view of this, the purpose of this utility model is to provide a kind of adjusting flow pump, with solve it is above-described extremely Small part technical problem.

One side according to the present utility model provides a kind of adjusting flow pump, including：

For the runner of trandfer fluid, it is connected to fluid inlet and fluid outlet respectively before and after runner；

Pumping unit is configured in compressible runner at least fluid of first position, fluid is made to be pumped from fluid outlet；

Flow-rate adjustment film, is set in runner and constitutes a part for runner, and positioned at fluid outlet and first described Between setting, there is elasticity, be configured to that the runner can be pressed to when being pressurized, fluid flow when pumping with further adjusting.

In a further embodiment, the pumping unit is piston connecting rod structure, piezoelectric patches, positive/negative-pressure alternately provide Unit or thread screw mechanism.

In a further embodiment, the piston connecting rod structure includes rotor, connecting rod, piston joint and piston, In, piston connecting hole is offered on the runner, the tight with piston conjunction is positioned in the piston connecting hole, can hang down along runner Histogram is to movement；The piston bush is set on described piston joint one end；The other end of the piston joint and the connecting rod one Movable connection is held, makes the movement of the connecting rod that the piston joint and piston be driven to be moved back and forth in piston connecting hole； The movable connection of the other end of the rotor and connecting rod, the rotor configuration is one motor of connection, for passing the rotation of motor The connecting rod is transported to, the link motion is made.

In a further embodiment, further include one being pneumatically connected hole, one end is connected to the flow-rate adjustment film Side, the other end are configured to one Pressure generator of connection, hole are pneumatically connected by this when Pressure generator generates pressure The flow-rate adjustment film is set to be pressurized.

In a further embodiment, further include a motor support base, be used to support the motor.

In a further embodiment, the material of the flow-rate adjustment film is fluorine glue, silica gel or nitrile rubber.

In a further embodiment, further include the first check valve, the first check valve is set to first position and flow Between adjusting film, for fluid described in one-way conduction.

In a further embodiment, further include the second check valve, the second check valve is set to the fluid in runner and enters Between mouth and first position, the direction of the second check valve channeling fluid is identical as the first check valve.

In a further embodiment, first check valve and the second check valve towards the direction of fluid outlet respectively With conical nose, the taper angle of the preferred conical nose is within 110 °.

Another aspect according to the present utility model also provides a kind of adjusting flow pump, including：

Fluid layer, including：The fluid inlet and fluid outlet being separately connected before and after runner and runner；Flow-rate adjustment film, It is set in runner, constitutes a part for runner；First check valve, for from fluid inlet to fluid outlet direction one-way conduction The fluid；Second check valve, the direction of channeling fluid are identical as first check valve；

Articulamentum is located on fluid layer, including：It is pneumatically connected hole, one end is connected to the one of the flow-rate adjustment film Side, the other end are configured to one Pressure generator of connection, and being pneumatically connected hole by this when Pressure generator generates pressure makes The flow-rate adjustment film presses to the runner after being pressurized；Piston connecting hole is opened in first position on the runner, wherein institute It states the first check valve to be set in runner between first position and flow-rate adjustment film, second check valve is set in runner Between fluid inlet and first position；

Control layer is located on articulamentum, including：Rotor, connecting rod, piston joint and piston, wherein the tight with piston Conjunction is positioned in the piston connecting hole, can be along runner movement in vertical direction；The piston bush is set to described piston joint one end On；The other end of the piston joint and the movable connection in connecting rod one end make the movement of the connecting rod drive the piston Connector and piston move back and forth in piston connecting hole；The movable connection of the other end of the rotor and connecting rod, the rotor Be configured to one motor of connection makes the link motion for the rotation of motor to be transmitted to the connecting rod.

In a further embodiment, the fluid outlet is configured to connect with a micro-fluidic chip.

Adjusting flow pump provided by the utility model, has the advantages that：

Adjusting flow pump while not reducing flow-rate adjustment precision, can also pass through flow-rate adjustment by pumping unit The deformation of film changes the average value of operating flow range, overcomes the small disadvantage of working range；

Adjusting flow pump is placed in the same direction by two check valves simple in structure, realizes the unidirectional reliable, stable of fluid It transports.

The most vulnerable control layer of adjusting flow pump is detachable, replaces, and the articulamentum of long lifespan and fluid layer can weigh It is multiple to utilize, energy conservation and environmental protection；

The motor being connect with rotor can be replaced according to demand, flexibly change working range and operating accuracy.

Description of the drawings

Fig. 1 is the adjusting flow pump configuration schematic diagram of the utility model embodiment.

Fig. 2 is the decomposition diagram of the adjusting flow pump configuration of the utility model embodiment.

Fig. 3 is the flow path section figure of the adjusting flow pump configuration of the utility model embodiment.

Fig. 4 is the adjusting flow pump configuration sectional view of the utility model embodiment.

Fig. 5 A and Fig. 5 B are the check valve stereoscopic schematic diagram and sectional view that the adjusting flow of the utility model embodiment pumps.

Reference sign：

10 control layers

101 motor support bases

102 piston connecting rod structures

1021 rotors

1022 connecting rods

1023 piston joints

1024 pistons

20 articulamentums

201 bearing connecting holes

202 piston connecting holes

203 are pneumatically connected hole

30 fluid layers

301 fluid inlets

302 runners

303 check valves

304 flow-rate adjustment films

305 fluid outlets

Specific implementation mode

To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with specific embodiment, and With reference to attached drawing, the utility model is described in further detail.

In the present specification, term " comprising " and " containing " and its derivative mean including and it is unrestricted.

In the present specification, following various embodiments for describing the utility model principle only illustrate, should not be with Any mode is construed to limitation scope of disclosure.With reference to attached drawing it is described below be used to help comprehensive understanding by claim and its The exemplary embodiment of the utility model that equivalent limits.It is described below to help to understand including a variety of details, but this A little details are considered as being only exemplary.Therefore, it will be appreciated by those of ordinary skill in the art that not departing from the utility model Scope and spirit in the case of, embodiment described herein can be made various changes and modifications.In addition, in order to clear For purpose of brevity, the description of known function and structure is omitted.In addition, running through attached drawing, same reference numerals are used for identical or phase As function and operation.In addition, although the scheme with different characteristic, this field may be described in different embodiments Technical staff it should be recognized that：All or part of feature of different embodiments can be combined, this practicality is not departed to be formed The new embodiment of novel spirit and scope.

The words such as ordinal number as used in this specification such as " first ", " second ", with modifying the list of different location To components such as valves, itself and do not include and represent corresponding component etc. have it is any before ordinal number, do not represent yet a certain component with Sequence before and after another component etc., the use of these ordinal numbers are only used for that the component with certain name etc. is made to be able to have with another The component of identical name can make clear differentiation.

Basic conception according to the present utility model provides a kind of adjusting flow pump, including：Stream for trandfer fluid Road, and respectively with latter linked fluid inlet and fluid outlet before runner；Pumping unit is configured in compressible runner at least The fluid of first position, makes fluid be pumped to fluid outlet；And flow-rate adjustment film, it is set in runner and constitutes runner A part, and between fluid outlet and first position, there is elasticity, it is configured to that the runner can be pressed to when being pressurized, Fluid flow when being pumped with further adjusting.By pumping unit while not reducing flow-rate adjustment precision, it can also pass through The deformation of flow-rate adjustment film changes the average value of operating flow range, overcomes the small disadvantage of working range.

For pumping unit, can be set in the prior art on runner various existing can compress in runner Fluid, with to the various structures of fluid outlet trandfer fluid, including but not limited to piezoelectric patches, piston connecting rod structure, positive/negative-pressure is handed over For offer unit or thread screw mechanism.The utility model embodiment is only described in detail with piston connecting rod structure, but this Field technology personnel should be understood that adjusting flow discussed below pumps each section concrete structure can also be with other types Pumping unit carry out arbitrary combination.

Fig. 1 is the adjusting flow pump configuration schematic diagram of the utility model embodiment.As shown in Figure 1, new according to this practicality Adjusting flow pump described in type embodiment includes the runner 302 for trandfer fluid, and the fluid inlet being connected to runner 301 and fluid outlet 305；Pumping unit (such as otherwise piston connecting rod structure 102 is connected with piston below unless stated otherwise Rod structure indicates), it is configured in compressible runner 302 at least fluid of first position, fluid is made to be pumped to along runner 302 Fluid outlet 305；Flow-rate adjustment film 304 is set in runner 302, and constituting the part of runner, (such as runner offers hole Hole, flow-rate adjustment film can be covered on the hole；Or runner 302 and flow-rate adjustment film 304 1 are made by 3D printing method It is body formed), and between fluid outlet 305 and the first position, there is elasticity, it is configured to that institute can be pressed to when being pressurized Runner 302 is stated, fluid flow when being pumped with further adjusting, the installation position of the flow-rate adjustment film 304 is properly termed as second It sets.

For pumping unit, the present embodiment is only illustrated with piston connecting rod structure 102, passes through piston connecting rod structure 102 can utilize the reciprocating motion sucking of piston to extrude the fluid in runner 302, realize fluid conveying.

Above-mentioned runner 302 is the access flowed for fluid, and the part of the runner 302 can be by pumping unit and/or flow Adjusting film or a part for section components or section components are constituted, so that entire access is closing structure.Runner 302 can be with Can be the multiple outlets of an entrance, an entrance one outlet or the multiple outlets of multiple entrances including multiple accesses, preferably It is an entrance one outlet.

In some embodiments, flow-rate adjustment film 304 can be arranged multiple, such as between first position and fluid outlet Runner on be spaced setting, spaced set preferably may be used.Correspondingly, can be offered on runner 302 multiple pneumatic Connecting hole 203 (namely above-mentioned hole) coordinates with multiple flow-rate adjustment films 304, and flow-rate adjustment film 304 can be bonded And it is covered in and is pneumatically connected on hole 203.

In some embodiments, what the compression that the material of flow-rate adjustment film 304 can be known in the art was deformed Various elastic materials, after which is pushed by external pressure, the fluid into runner applies resistance, to slow down pumping Unit pumps fluid, to reduce range of flow average value in the case where not reducing flow-rate adjustment precision；Can be preferably resistance to Fluorine glue, silica gel or the nitrile rubber material of burn into long lifespan, low cost.

In some embodiments, piston connecting rod structure 102 may include rotor 1021, connecting rod 1022, piston joint 1023 With piston 1024, wherein offering piston connecting hole 202 on runner, (position that opens up of the piston connecting hole 202 is above-mentioned the One position), piston connecting hole here has certain hole depth, can accommodate piston and be in vertical motion, 1024 close-fitting of piston Conjunction is placed in piston connecting hole 202 that (wherein in order to ensure leakproofness, the size of piston 1024 is slightly larger than piston connecting hole 202 Size namely tight fit), can be along the movement in vertical direction of runner 302；Piston 1024 is sheathed on one end of piston joint 1023 On；The movable connection of the other end of piston joint 1023 and 1022 one end of connecting rod (such as the connection of card key formula or set rod-type connect Connect), make the movement of connecting rod 1022 that piston joint 1023 and piston 1024 be driven to be moved back and forth in piston connecting hole 202；Turn Son 1021 and the other end of connecting rod 1022 movable (such as connecting rod one end is mobilizable be placed on the protruding part of rotor 1021) are even It connects, 1021 axis of rotor is configured to one motor of connection makes the connecting rod for the rotation of motor to be transmitted to the connecting rod 1022 1022 movements, can drive to piston joint 1023, make piston joint 1023 and piston 1024 in piston connecting hole 202 accordingly Interior reciprocating motion.

In some embodiments, adjusting flow pump further includes one being pneumatically connected hole 203, and one end is connected to the flow (make to be pneumatically connected the end of hole 203 keeps air-tightness to connect with flow-rate adjustment film 304, prevents gas from two for the side of adjusting film 304 The junction of person leaks out), it is pneumatically connected 203 other end of hole and is configured to one Pressure generator of connection (such as the gas containing air valve Bottle), when Pressure generator generates pressure being pneumatically connected hole 203 by this makes the flow-rate adjustment film 304 be pressurized, to press To the runner residing for the flow-rate adjustment film other side, to increase fluid resistance, to adjust flow.

In some embodiments, adjusting flow pump further includes a motor support base 101, is used to support above-mentioned motor.Phase It answers, adjusting flow pump further includes a bearing connecting hole 201, to be limited to motor support base 101.The motor support base 101 It can be disconnectable motor support base.

As shown in Figures 2 to 4, adjusting flow pump can also include the first check valve 3031, and the first check valve 3031 is set It is placed between piston connecting hole (namely first position) 202 and flow-rate adjustment film 304, for fluid described in one-way conduction.

In a further embodiment, adjusting flow pump can also include the second check valve 3032, the second check valve 3032 are set between fluid inlet 301 and piston connecting hole 202, and the direction of 3032 channeling fluid of the second check valve is single with first It is identical to valve 3031.

In a further embodiment, the first check valve 3031 and the second check valve 3032 are towards the direction of fluid outlet Respectively there is conical nose, the taper angle of the preferred conical nose is within 110 °.As fig. 5 a and fig. 5b, unidirectionally Valve realizes one-way conduction performance using the deformation of conical nose, and the film there are two normally off is arranged on check valve conical nose Valve, water (flow) direction are when being flowed out from conical nose, and film valve is opened, runner conducting；Water (flow) direction is film when being flowed into from conical nose Valve is in closed state, and runner is not turned on.After tested, the angle of conical nose can realize good positive guide within 110 ° The general character and reversely cut-off property.It is to ensure outside conical nose at the rectangular section of width very little at check valve head outlet Portion's pressure can realize reversed cut-off when being slightly above its internal pressure.

In some embodiments, above-mentioned Pressure generator and motor are configured to be electrically connected to a controller, the control Device can control the two and work at the same time, and while realizing that motor rotation makes fluid be pumped to fluid outlet, pass through pressure and generate dress Setting the air pressure of conveying makes flow-rate adjustment film 304 squeeze fluid in runner, adjusts range of flow, and can exist by changing motor speed Flow is adjusted in flow-rate adjustment film setting range.

As shown in Figure 2 and Figure 4, the adjusting flow pump of the utility model embodiment can be hierachical structure.It is tool below The hierachical structure embodiment of body, but it is only that the utility model is expanded on further, and should not be construed as the restriction of the application.

Fig. 2 and adjusting flow shown in Fig. 4 pump may include 10 three-layered node of fluid layer 30, articulamentum 20 and control layer Structure.

Wherein, fluid layer 30 includes：Runner 302 and fluid inlet 301 for fluid flowing and fluid outlet 305；Stream Body layer further includes flow-rate adjustment film 304, is set in runner 302, and a part for runner is constituted；Can also include check valve 303, Specific set-up mode is with reference to described in above-described embodiment.

Wherein, articulamentum 20 is located on fluid layer, including：It is pneumatically connected hole 203, one end is connected to the flow tune The side of film is saved, the other end is configured to one Pressure generator of connection, pneumatic by this when Pressure generator generates pressure Connecting hole presses to the runner after so that the flow-rate adjustment film is pressurized；Piston connecting hole 202 is opened on the runner；

Control layer 10 is located on articulamentum 20, including rotor 1021, connecting rod 1022, piston joint 1023 and piston 1024, wherein 1024 tight fit of the piston is placed in the piston connecting hole 202, can be along runner movement in vertical direction；Institute Piston 1024 is stated to be sheathed on 1023 one end of the piston joint；The other end of the piston joint 1023 and the connecting rod 1022 The movable connection in one end makes the movement of the connecting rod 1022 that the piston joint 1023 and piston 1024 be driven to be connected in piston It is moved back and forth in hole 202；The movable connection of the other end of the rotor 1021 and connecting rod 1022,1021 company of being configured to of the rotor A motor is connect, for the rotation of motor to be transmitted to the connecting rod 1022, the connecting rod 1022 is made to move.

In some instances, control layer further includes a motor support base 101, is used to support the motor；The articulamentum packet Bearing connecting hole 201 is included, motor support base 101 is fixed by the bearing connecting hole 201.

For the adjusting flow pump of specific embodiment described in Fig. 2 and Fig. 4, application method can be as follows：

1. motor is packed into motor support base 101.

2. piston connecting rod structure 102 is connected with motor rotary head.

3. being aligned and being inserted into motor support base 101 to bearing connecting hole 201, be aligned and be inserted into piston 1024 to piston connecting hole 202, control layer 10 is connect with articulamentum 20, lubrication flow can be added when being inserted into connection with piston connecting hole 202 in piston 1024 Body is lubricated.

4. by Pressure generator and being pneumatically connected hole 203 and passing through piping connection.

5. fluid source is connect by fluid inlet 301 with runner.

6. fluid outlet 305 is connected with downstream unit (such as micro-fluidic chip).

7. adjusting the supply pressure of Pressure generator, flow-rate adjustment film generates default deformation so that adjusting flow pumps Working range satisfy the use demand.

8. starting motor, regulation motor rotating speed changes flow.

It, can above by the adjusting flow pump of the utility model embodiment, it can be achieved that accurate and be continually provided flow Change flow by the rotating speed of regulation motor, by the flow resistance in pneumatic flow-rate adjustment membrane change flow path, is ensureing to adjust essence Change the variation range of flow while spending.

Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, are not limited to this reality With novel, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all include It is within the protection scope of the utility model.

Claims

1. a kind of adjusting flow pump, which is characterized in that including：

Flow-rate adjustment film, is set in runner, constitutes a part for runner, and positioned at fluid outlet and the first position it Between, there is elasticity, be configured to that the runner can be pressed to when being pressurized, fluid flow when pumping with further adjusting.

2. adjusting flow according to claim 1 pump, which is characterized in that the pumping unit be piston connecting rod structure, Piezoelectric patches, positive/negative-pressure alternately provide unit or thread screw mechanism.

3. adjusting flow pump according to claim 2, which is characterized in that the piston connecting rod structure includes rotor, connects Bar, piston joint and piston, wherein

Piston connecting hole is offered on the runner, the tight with piston conjunction is positioned in the piston connecting hole, can be along runner Movement in vertical direction；

The piston bush is set on described piston joint one end；

The other end of the piston joint and the movable connection in connecting rod one end make the movement of the connecting rod drive the piston Connector and piston move back and forth in piston connecting hole；

The movable connection of the other end of the rotor and the connecting rod, the rotor configuration are one motor of connection, are used for motor Rotation be transmitted to the connecting rod, make the link motion.

4. adjusting flow according to claim 3 pump, which is characterized in that further include one being pneumatically connected hole, one end connects It is connected to the side of the flow-rate adjustment film, the other end is configured to one Pressure generator of connection, and pressure is generated in Pressure generator Being pneumatically connected hole by this when power makes the flow-rate adjustment film be pressurized.

5. adjusting flow pump according to claim 3, which is characterized in that further include a motor support base, be used to support institute State motor.

6. adjusting flow according to claim 1 pump, which is characterized in that the material of the flow-rate adjustment film be fluorine glue, Silica gel or nitrile rubber.

7. adjusting flow pump according to claim 1, which is characterized in that further include the first check valve, described first is single It is set in runner between first position and flow-rate adjustment film to valve, for according to single from first position to flow-rate adjustment film direction To the conducting fluid.

8. adjusting flow pump according to claim 7, which is characterized in that further include the second check valve, the second check valve It is set to the fluid inlet in runner and between first position, the direction of the second check valve channeling fluid and the first check valve phase Together.

9. adjusting flow pump according to claim 7, which is characterized in that first check valve and the second check valve court Respectively there is conical nose to the direction of fluid outlet.

10. adjusting flow pump according to claim 9, which is characterized in that the taper angle of the conical nose exists Within 110 °.

11. a kind of adjusting flow pump, which is characterized in that including：

Fluid layer, including：

The fluid inlet and fluid outlet being separately connected before and after runner and runner；

Flow-rate adjustment film, is set in runner, constitutes a part for runner；

First check valve is used for fluid described in from fluid inlet to fluid outlet direction one-way conduction；

Second check valve, the direction of channeling fluid are identical as first check valve；

Articulamentum is located on fluid layer, including：

It is pneumatically connected hole, one end is connected to the side of the flow-rate adjustment film, and the other end is configured to one pressure of connection and generates dress It sets, is pneumatically connected after hole makes the flow-rate adjustment film be pressurized by this when Pressure generator generates pressure and presses to the stream Road；

Piston connecting hole is opened in first position on the runner, wherein first check valve is set in runner first It sets between flow-rate adjustment film, second check valve is set to the fluid inlet in runner and between first position；

Control layer is located on articulamentum, including：

Rotor, connecting rod, piston joint and piston, wherein the tight with piston conjunction is positioned in the piston connecting hole, can be along stream Road movement in vertical direction；The piston bush is set on described piston joint one end；The other end of the piston joint and the company The movable connection in bar one end makes the movement of the connecting rod that the piston joint and piston be driven back and forth to be transported in piston connecting hole It is dynamic；The movable connection of the other end of the rotor and connecting rod, the rotor configuration are one motor of connection, are used for the rotation of motor It is transmitted to the connecting rod, makes the link motion.

12. the adjusting flow pump according to claim 1 or 11, which is characterized in that the fluid outlet is configured to and one Micro-fluidic chip connects.