CN110152751A - A kind of electrical pipette rifle - Google Patents
A kind of electrical pipette rifle Download PDFInfo
- Publication number
- CN110152751A CN110152751A CN201910439313.XA CN201910439313A CN110152751A CN 110152751 A CN110152751 A CN 110152751A CN 201910439313 A CN201910439313 A CN 201910439313A CN 110152751 A CN110152751 A CN 110152751A
- Authority
- CN
- China
- Prior art keywords
- air flue
- key
- servo motor
- liquid
- shell
- 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
Links
- 238000005452 bending Methods 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 38
- 230000002411 adverse Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000032683 aging Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- MFRCZYUUKMFJQJ-UHFFFAOYSA-N 1,4-dioxane-2,5-dione;1,3-dioxan-2-one Chemical compound O=C1OCCCO1.O=C1COC(=O)CO1 MFRCZYUUKMFJQJ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
- B01L3/0227—Details of motor drive means
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Jet Pumps And Other Pumps (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Abstract
The invention discloses a kind of electrical pipette rifle, including shell, air flue is equipped in the shell；It is equipped with impeller in the air flue, is equipped in the shell for driving the direct current generator of the impeller forward or reverse；One end of the air flue is equipped with venthole, and the other end of the air flue is equipped with air inlet, is equipped with double check valve at the air inlet.By adopting the above-described technical solution, relative to existing piston and reversal valve liquid-transfering gun structure, structure of the invention is simpler, and to the of less demanding of leakproofness, therefore reliability is higher, longer life expectancy.By the way that waterproof seal is arranged, it can effectively avoid because maloperation causes liquid to contact direct current generator, if because operation error to suck liquid in air flue, it can be by pressing the second key, so that the liquid into air flue is all discharged by air inlet, adverse effect will not be caused to the present invention.By using DC servo motor, the stepless time adjustment of electrical pipette rifle is realized, liquid relief efficiency can be effectively improved.
Description
Technical field
The present invention relates to Laboratory Instruments fields, and in particular to a kind of electrical pipette rifle.
Background technique
Liquid-transfering gun is one kind of pipettor, be usually used in laboratory it is a small amount of or micro liquid pipette, belong to precision instrument.
It is divided into manual and electrical pipette rifle in working principle.Compared with manual liquid-transfering gun, electrical pipette rifle is more efficient, thus
It is widely used in all kinds of tests.
Existing electrical pipette rifle generallys use motor driven piston up-down and the pipeline of reversal valve switches to adjust
Air pressure in solar term road, to realize the continuous sucking and blowout of liquid.When electrical pipette rifle continuously sucks liquid, motor driven
Piston up-down, while being switched by the pipeline of reversal valve, so that consistently forming negative pressure in air flue, air is sucked, thus real
The continuous sucking of existing liquid；When electrical pipette rifle continuously blows out liquid, motor driven piston up-down, while passing through reversal valve
Pipeline switching so that consistently form positive pressure in air flue, blow out air, to realize the continuous blowout of liquid.The device lacks
Point is: 1, reversal valve needs continually to commutate, and so that system is become complicated, is easy to happen failure；2, very to the requirement of leakproofness
Height, often due to air flue and sealant aging and lose leakproofness so as to cause can not normal use.
Summary of the invention
For solve background technique in existing electrical pipette rifle due to air flue and sealant aging and lose leakproofness to
The problem of leading to not normal use, the present invention provides a kind of electrical pipette rifle, specific technical solution is as follows.
A kind of electrical pipette rifle, including shell, the shell is interior to be equipped with air flue；Impeller is equipped in the air flue, it is described outer
It is equipped in shell for driving the direct current generator of the impeller forward or reverse；One end of the air flue is equipped with venthole, the gas
The other end in road is equipped with air inlet, is equipped with double check valve at the air inlet.
Pipette (prior art) is installed in air inlet first.When needing to draw liquid, direct current generator is rotated forward and is driven
The air in the air flue is discharged from venthole in the impeller, negative pressure is formed in air flue, and then make the double check valve
It inwardly opens, and draws liquid simultaneously.After the completion of absorption, direct current generator stops operating, double check valve both ends without draught head, from
And be automatically closed, rest on liquid in pipette.Invert direct current generator when needing to blow out liquid.It is opposite with it is existing
Piston and reversal valve liquid-transfering gun structure, structure of the invention is simpler, and to the of less demanding of leakproofness, therefore reliability
It is higher, longer life expectancy.
Preferably, guide vane is additionally provided in the air flue, the guide vane is fixedly connected with the inner wall of the air flue, the guide vane
Positioned at the front end of the impeller.By holding setting guide vane before the impeller, dredging flow can be played the role of, improve gas conveying
Efficiency saves battery power.
Preferably, the direct current generator is connect by motor shaft with the impeller, and the air flue, which is equipped with, supplies the motor
The through-hole that axis passes through is equipped with waterproof seal between the through-hole and the motor shaft.
The liquid-transfering gun of existing piston and structure of reversing valve composition should be avoided since the liquid in air ducting system is difficult to be discharged
Liquid is inhaled into the air flue even cylinder of liquid-transfering gun.The present invention by the way that waterproof seal is arranged between through-hole and motor shaft,
It can effectively avoid because maloperation causes liquid to contact direct current generator, if can lead to because operation error to suck liquid in air flue
It crosses and presses the second key, so that the liquid into air flue is all discharged by air inlet, adverse effect will not be caused to the present invention.
Preferably, the direct current generator is DC servo motor.By using DC servo motor, when signal voltage is zero
When without rotation phenomenon, avoid inertia because of impeller from then cause liquid-transfering gun to suck extra liquid, it is ensured that liquid-transfering gun sucking
The precision of amount of liquid.
Preferably, controller is additionally provided in the shell, the shell is equipped with the first key and the second key；The control
Device processed and the DC servo motor, first key and described second are by key connection；The controller is in the first key
The DC servo motor is controlled when being pressed to rotate forward, and the DC servo motor reversion is controlled when the second key is pressed.
Preferably, first key is equipped with first position sensor, and second key is passed equipped with the second position
Sensor；The first position sensor and the second position sensor are connect with the controller；First key/the
The depth that two keys are pressed is deeper, and the revolving speed that the controller controls the DC servo motor is faster.
Preferably, displacement signal is converted to voltage signal by the first position sensor/second position sensor, described
Controller controls the revolving speed of the DC servo motor according to the size of the voltage signal values, and the voltage signal values are got over
Greatly, the revolving speed of the DC servo motor is faster.
The steering and revolving speed that DC servo motor is adjusted using displacement sensor are the prior art, and the present invention is not to it
Make any improvement.DC servo motor drives the amount moved when Mechanical Moving (such as each axis of numerical control device) and institute in place
It sets, is just completed by displacement sensor, the data feedback that displacement sensor is exported gives servo-system master controller, system master
Device processed, which issues instruction to DC servo motor driver again according to each axis position, keeps another target of each axial direction mobile.By servo
System master controller ----DC servo motor driver ----DC servo motor ----displacement sensor ----servo-system
Master controller, thus one closed-loop control system of shape, this system are known as closed loop servo system.Pass through above structure, this hair
The stepless time adjustment of bright achievable electrical pipette rifle, so as to effectively improve liquid relief efficiency.
Preferably, the air flue lateral arrangement, one end of the air flue have the first bending section being bent upwards, and described the
One bending section is connected to the venthole on the shell；The other end of the air flue has reclinate second bending section, institute
State the bottom that double check valve is mounted on second bending section.
Preferably, suction nozzle is additionally provided at the air inlet.
Preferably, 344515 12V of model maxon RE10 of the DC servo motor.
Preferably, the first position sensor and second position sensor are linear position sensors, model
KTC1。
Preferably, the controller is PLC or single-chip microcontroller.
Due to using above technical scheme, relative to existing piston and reversal valve liquid-transfering gun structure, knot of the invention
Structure is simpler, and to the of less demanding of leakproofness, therefore reliability is higher, longer life expectancy.By through-hole and motor shaft it
Between waterproof seal is set, can effectively avoid because maloperation cause liquid contact direct current generator, if because operation error makes air flue
Middle sucking liquid, then can by pressing the second key so that into air flue liquid by air inlet all be discharged, will not be to this hair
It is bright to cause adverse effect.By using DC servo motor, the stepless time adjustment of electrical pipette rifle is realized, effectively improves shifting
Liquid efficiency.
Detailed description of the invention
Fig. 1 is perspective view of the invention；
Fig. 2 is the top view of Fig. 1；
Fig. 3 is A-A cross-sectional view in Fig. 2；
Fig. 4 is the structural schematic diagram of transmission mechanism of the present invention (impeller, guide vane, direct current generator, motor shaft)；
Fig. 5 is the structural schematic diagram of double check valve in the present invention.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
Referring to Fig. 1-4, a kind of electrical pipette rifle, including shell, the shell includes gun body 1 and handle 2, in the gun body
It is transversely provided with air flue.
As shown in figure 3, one end of the air flue has the first bending section 111 being bent upwards, first bending section 111
It is connected to the venthole 112 at 1 top of gun body；The other end of the air flue has reclinate second bending section 113, institute
The end for stating the second bending section 113 is air inlet, and double check valve 114 and suction nozzle 115 are successively arranged at the air inlet.
As shown in figure 3, being equipped with DC servo motor 21, controller 22, battery 23,24 and of the first key in the handle 2
Second key 25.Impeller 3 and guide vane 4 are equipped in the air flue.The impeller 3 passes through motor shaft 211 and DC servo electricity
Machine 21 connects, and the guide vane 4 is fixedly mounted on air flue inner wall, and is located at the front end of the impeller 3.The air flue, which is equipped with, to be supplied
The through-hole that the motor shaft 211 passes through is equipped with waterproof seal 116 between the through-hole and the motor shaft 211.
As shown in figure 3, the battery 23 is connect with the controller 22, the controller and first key 24, the
Two keys 25 and DC servo motor 21 connect.First position sensor is equipped on the right side of first key 24 (not show in figure
Out), sensor (not shown) in the second position is equipped on the right side of second key 25；First position sensor/the second
Displacement signal is converted to voltage signal by position sensor, and the voltage signal is sent to the controller 22, the control
Device 22 controls the revolving speed of the DC servo motor 21 according to the size of the voltage signal values, and the voltage signal values are got over
Greatly, the revolving speed of the DC servo motor 21 is faster, and the electrodeless tune of liquid-transfering gun sucking or discharge liquid rate thus can be realized
Section.
When work, pipette (prior art is not shown in the figure) is mounted on the suction nozzle 115 first.When needing to inhale
When taking liquid, the first key 24 is pressed, DC servo motor 21 starts to rotate forward, and torque is transmitted to leaf by motor shaft 211
Wheel 3.Impeller 3 rotates, and the air in air flue is expelled to atmosphere through venthole 112, and negative pressure is generated in air flue, which makes
The double check valve 114 towards opening in air flue so that the air in suction nozzle 115 is also sucked out, generate negative pressure, so as to
Draw liquid.The depth being pressed by adjusting the first key 24, can control the revolving speed of DC servo motor 21, to control
Liquid assimilating speed.In the initial stage, the first key 24 can be pressed to bosom, liquid is drawn with prestissimo；Work as liquid draw
When the volume of body reaches setting value fastly, first key 24 is unclamped slightly, can reach setting suction by drawing at a slow speed
Take volume；When reaching setting volume, it is totally released first key 24, DC servo motor 21 shuts down immediately, this
When double check valve 114 there is no pressure differences at both ends, to be automatically closed, at this point, the stable gas pressure in suction nozzle 1, so that liquid
It rests in pipette.
When needing to blow out liquid, the first key 24 is unclamped, presses the second key 25, DC servo motor 21 starts instead
Turn, and torque is transmitted to impeller 3 by motor shaft 211.Impeller 3 rotates, and air is sucked gas from atmosphere by venthole 112
Road, and positive pressure is generated in entire air flue, which open double check valve 114 towards air flue external-open, and sky is entered in suction nozzle 115
Gas generates positive pressure, so as to blow out liquid.The depth being pressed by the second key 25, can control DC servo motor
21 revolving speed, to control liquid blowout speed.In the initial stage, liquid can be slowly blown out with the second key of flicking 25；Work as liquid
When body stablizes blowout, then the second key 25 is pressed completely, can quickly blow out all liq；After work, unclamps second and press
Key 25, DC servo motor 21 shut down immediately, and there is no pressure differences at the both ends of double check valve 114 at this time, to close automatically
It closes.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of electrical pipette rifle, including shell, the shell is interior to be equipped with air flue, it is characterised in that: is equipped with leaf in the air flue
Wheel, the shell is interior to be equipped with for driving the direct current generator of the impeller forward or reverse；One end of the air flue is equipped with ventilation
Hole, the other end of the air flue are equipped with air inlet, are equipped with double check valve at the air inlet.
2. electrical pipette rifle according to claim 1, it is characterised in that: be additionally provided with guide vane, the guide vane in the air flue
It is fixedly connected with the inner wall of the air flue, the guide vane is located at the front end of the impeller.
3. electrical pipette rifle according to claim 1 or 2, it is characterised in that: the direct current generator passes through motor shaft and institute
Impeller connection is stated, the air flue is equipped with the through-hole passed through for the motor shaft, is equipped between the through-hole and the motor shaft
Waterproof seal.
4. electrical pipette rifle according to claim 1 or 2, it is characterised in that: the direct current generator is DC servo motor.
5. electrical pipette rifle according to claim 4, it is characterised in that: controller is additionally provided in the shell, it is described outer
Shell is equipped with the first key and the second key；The controller and the DC servo motor, first key and described
Second by key connection；The controller controls the DC servo motor when the first key is pressed and rotates forward, in the second key
The DC servo motor reversion is controlled when being pressed.
6. electrical pipette rifle according to claim 5, it is characterised in that: first key is sensed equipped with first position
Device, second key are equipped with second position sensor；The first position sensor and the second position sensor are equal
It is connect with the controller；The depth that first key/second key is pressed is deeper, and the controller controls the direct current
The revolving speed of servo motor is faster.
7. electrical pipette rifle according to claim 6, it is characterised in that: the first position sensor/second position passes
Displacement signal is converted to voltage signal by sensor, and the controller controls the direct current according to the size of the voltage signal values
The revolving speed of servo motor, the voltage signal values are bigger, and the revolving speed of the DC servo motor is faster.
8. electrical pipette rifle according to claim 1 or 2, it is characterised in that: the air flue lateral arrangement, the air flue
One end has the first bending section being bent upwards, and first bending section is connected to the venthole on the shell；The air flue
The other end there is reclinate second bending section, the double check valve is mounted on the bottom of second bending section.
9. electrical pipette rifle according to claim 1 or 2, it is characterised in that: be additionally provided with suction nozzle at the air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910439313.XA CN110152751B (en) | 2019-05-24 | 2019-05-24 | Electric pipette |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910439313.XA CN110152751B (en) | 2019-05-24 | 2019-05-24 | Electric pipette |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110152751A true CN110152751A (en) | 2019-08-23 |
| CN110152751B CN110152751B (en) | 2024-05-17 |
Family
ID=67632513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910439313.XA Active CN110152751B (en) | 2019-05-24 | 2019-05-24 | Electric pipette |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110152751B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU23483A1 (en) * | 1929-03-11 | 1931-10-31 | П.П. Портянов | Shield with felt seals to the bearings of electrical machines |
| US3502919A (en) * | 1969-01-02 | 1970-03-24 | Borg Warner | Submersible motor seal section |
| US6253628B1 (en) * | 1998-08-21 | 2001-07-03 | Becton Dickinson And Company | Apparatus for drawing liquids into and expelling liquids from a pipet at variable flow rates |
| AU2003303692A1 (en) * | 2003-01-14 | 2004-08-10 | Pz Htl Spolka Akcyjna | Method of dispensing liquid in a pipetting device and the pipetting device |
| US20130243666A1 (en) * | 2012-03-02 | 2013-09-19 | Eppendorf Ag | Pipetting Apparatus and Method for Production Thereof |
| CN103623879A (en) * | 2013-12-16 | 2014-03-12 | 山东大学齐鲁医院 | Laser positioning type liquid transferring gun |
| CN204168040U (en) * | 2014-10-22 | 2015-02-18 | 上海特波电机有限公司 | Low-loss machine shaft seal |
| CN205304436U (en) * | 2015-12-28 | 2016-06-08 | 杭州天马时控科技有限公司 | Arrange water pump motor rotor |
| CN205298034U (en) * | 2015-12-15 | 2016-06-08 | 杭州天马时控科技有限公司 | Arrange water pump rotor seal structure |
| US20160279630A1 (en) * | 2015-03-29 | 2016-09-29 | Massachusetts Institute Of Technology | Methods and Apparatus for Pipetting |
| CN206712580U (en) * | 2017-05-10 | 2017-12-05 | 青岛晟润泰电气制造有限公司 | A kind of water-proof fan |
| CN210303723U (en) * | 2019-05-24 | 2020-04-14 | 南华大学 | Electric liquid-transfering gun |
-
2019
- 2019-05-24 CN CN201910439313.XA patent/CN110152751B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU23483A1 (en) * | 1929-03-11 | 1931-10-31 | П.П. Портянов | Shield with felt seals to the bearings of electrical machines |
| US3502919A (en) * | 1969-01-02 | 1970-03-24 | Borg Warner | Submersible motor seal section |
| US6253628B1 (en) * | 1998-08-21 | 2001-07-03 | Becton Dickinson And Company | Apparatus for drawing liquids into and expelling liquids from a pipet at variable flow rates |
| AU2003303692A1 (en) * | 2003-01-14 | 2004-08-10 | Pz Htl Spolka Akcyjna | Method of dispensing liquid in a pipetting device and the pipetting device |
| US20130243666A1 (en) * | 2012-03-02 | 2013-09-19 | Eppendorf Ag | Pipetting Apparatus and Method for Production Thereof |
| CN103623879A (en) * | 2013-12-16 | 2014-03-12 | 山东大学齐鲁医院 | Laser positioning type liquid transferring gun |
| CN204168040U (en) * | 2014-10-22 | 2015-02-18 | 上海特波电机有限公司 | Low-loss machine shaft seal |
| US20160279630A1 (en) * | 2015-03-29 | 2016-09-29 | Massachusetts Institute Of Technology | Methods and Apparatus for Pipetting |
| CN205298034U (en) * | 2015-12-15 | 2016-06-08 | 杭州天马时控科技有限公司 | Arrange water pump rotor seal structure |
| CN205304436U (en) * | 2015-12-28 | 2016-06-08 | 杭州天马时控科技有限公司 | Arrange water pump motor rotor |
| CN206712580U (en) * | 2017-05-10 | 2017-12-05 | 青岛晟润泰电气制造有限公司 | A kind of water-proof fan |
| CN210303723U (en) * | 2019-05-24 | 2020-04-14 | 南华大学 | Electric liquid-transfering gun |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110152751B (en) | 2024-05-17 |
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Inventor after: Gao Ling Inventor after: Gui Qingjun Inventor after: Yin Kai Inventor after: Li Ermao Inventor after: Chen Hainan Inventor after: Yin Linjie Inventor before: Gui Qingjun Inventor before: Gao Ling Inventor before: Yin Kai Inventor before: Li Ermao Inventor before: Chen Hainan Inventor before: Yin Linjie |
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