CN101850279B - Device for assisting pipette to conveniently transfer liquid - Google Patents
Device for assisting pipette to conveniently transfer liquid Download PDFInfo
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- CN101850279B CN101850279B CN2010101966482A CN201010196648A CN101850279B CN 101850279 B CN101850279 B CN 101850279B CN 2010101966482 A CN2010101966482 A CN 2010101966482A CN 201010196648 A CN201010196648 A CN 201010196648A CN 101850279 B CN101850279 B CN 101850279B
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- piston
- pipette
- anchor clamps
- air admission
- admission hole
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Abstract
The invention relates to a device for assisting a pipette to conveniently transfer liquid. The head of the device is provided with a three-jaw clamp which can move up and down, a base of the three-jaw clamp is connected with the end of a control handle through a clamp-connecting rod, and a clamp spring is placed between the head of the shell of the device and the base of the three-jaw clamp; the lower end of a piston of a piston part is connected with a piston handle through a piston-connecting rod, a spring is placed between the lower end of the piston and the bottom of a piston cavity, the upper end of the piston cavity is provided with a one-way intake valve and a one-way exhaust valve, the one-way intake valve is connected with the base of the three-jaw clamp through a communicating tube, and the piston cavity is communicated with the outside through the one-way exhaust valve. The operation of the device is highly safe, and cannot be easily affected by the proficiency and skill of an operator, and compared with the high-end precise pipettor, the device has the advantages of simple design and cheapness, can be widely used in teaching and ordinary laboratories, and can keep the liquid-transferring precision of the pipette.
Description
Technical field
The present invention relates to a kind of pipette transfer device, especially a kind of pipettor of ability assisting pipette to conveniently transfer liquid.
Background technology
Pipette is a kind of also measuring device of transfer liquid that in experiment, is used for accurately measuring, and is widely used in chemistry, biology, pharmacy and relevant research field.
The most traditional in the experiment, the promptly at present most widely used liquid mode of moving is to utilize rubber pipette bulb to assist pipette to come transfer liquid.The whole operation process is united realization by two kinds of structures independently, is respectively: rubber pipette bulb and pipette.General operation is to come the grasping pipette with a hand, and another hand (i.e. a habitual hand in the life) is controlled rubber pipette bulb.Firmly with the end of the front end point mouth of rubber pipette bulb and pipette by tight and closely contact, the cavity of pushing rubber pipette bulb with hand partly changes the shape of rubber pipette bulb, with part air discharge rubber pipette bulb, and under atmospheric effect, liquid is pressed into pipette.The amount that once gets into the liquid of pipette can be pushed the dynamics of rubber pipette bulb, the speed of loosing one's grip and rubber pipette bulb by hand and once discharged the amount of air and regulate.Wait to suck after the liquid of q.s, can remove rubber pipette bulb rapidly, and block the pipette end, then the pipette front end is stretched into purpose container or solution, unclamp thumb, can discharge the solution in the pipette with thumb.
When discharging pipette solution in batches or carrying out the adjustment of volumetric soiutions volume, can be through the liquid level position and the scale that tightness degree is adjusted pipette that contact of change thumb and pipette end.
Can sum up through a large amount of use experiences, this employing rubber pipette bulb assists the mode of operation of the accurate transfer liquid of pipette easier, and pipette and rubber pipette bulb are cheap.But, because the material soft or hard of each rubber pipette bulb, individual's operate miss and the difference of qualification cause the excessive back of imbibition to get into rubber pipette bulb easily; Cause the pollution in rubber pipette bulb chamber; Even the solution that moves fast damages (operation such as to the strong acid alkaline solution is very prudent, particularly uses the people of pipette for the first time) from the ejection of pipette upper end to human body easily, and for first user; Be difficult to do the coordination with eye in one's hands; Can not guarantee in the operation that eyes take into account rubber pipette bulb and pipette liquid level simultaneously,, therefore cause experimental result error even mistake to occur because the pipette precision is influenced by visual angle easily; In addition, need bimanualness during experiment.
In order to overcome an above-mentioned difficult problem, a lot of novel pipettors have appearred on the market in recent years, and existing hand push type pipettor also has electrodynamic type pipettor that operation is very easy or the like.
Adopt pipettor (liquid-transfering gun) to carry out single or the transfer of solution in batches, can greatly improve the security that moves liquid efficient and increased strong acid, highly basic, corrosivity and irritating solution.At present; Mainly contain the pipettor of Gilson, Socorex, Eppendorf, Finnpipette, Thermo Scientific and big dragon company etc. on the market, the pipettor general precision of foreign brand name is higher, relatively hommization of design; But cost an arm and a leg; The price of a pipettor from more than 1,000 to not waiting up to several thousand yuan, in general experiment (the particularly experimental teaching of school), the higher pipettor of this precision and security can not staff one.Yet, for homemade pipettor, low price, but the non-constant of precision, to move the liquid error very big at every turn, uses in the time of generally can only being used for non-quantitative and qualitative analysis experiment.In addition, in a single day pipettor pollutes, and cleaning process is complicated, and very inconvenient.Therefore, in teaching class and general experimental implementation, pipette (perhaps graded tube) is irreplaceable.
Summary of the invention
The present invention will solve existing rubber pipette bulb to cooperate pipette to move the liquid collimation error dangerous, unstable, that cause owing to bimanualness and the pipettor of import costs an arm and a leg; Homemade pipettor low precision; Pipette can not be by the technical problem that substitutes widely; And a kind of device of assisting pipette to conveniently transfer liquid is provided, this device can assisting pipette to conveniently transfer liquid safely, and realize the function of rubber pipette bulb.
For achieving the above object, technical scheme of the present invention is: a kind of assisting pipette to conveniently moves the device of liquid, comprises holder part, and piston portion and venting part are characterized in:
Holder part is in whole device case; Its head is provided with the three-jaw anchor clamps that can move up and down; Three-jaw anchor clamps rear end is connected with a base; The base of three-jaw anchor clamps is connected through an anchor clamps connecting rod that can move up and down and joystick are terminal, is provided with a seal sleeve that is connected with the base of three-jaw anchor clamps in the three-jaw anchor clamps, places clamp spring between the base front end of three-jaw anchor clamps head rear end and three-jaw anchor clamps;
Piston portion is installed in the right side of outer casing sleeve; Piston lower end in the piston cavity is fixedly connected with the piston handle through the piston rod that passes the piston rod fixed muffle; Place spring between at the bottom of piston lower end and the piston cavity; Piston cavity upper end is provided with breather check valve and exhaust check valve, and breather check valve is positioned at the air inlet of piston cavity and is connected with the three-jaw clamp base through connecting pipe;
The venting part is made up of a revolvable air admission hole loam cake and a fixing air admission hole base that has onesize eccentric circular hole that has eccentric circular hole; The air admission hole base is fixed on the left side of outer casing sleeve; Its mouth is provided with the eccentric mount air admission hole; Be rotary with the air admission hole loam cake above, cover on the air admission hole and have eccentric loam cake air admission hole, the eccentric mount air admission hole of air admission hole base links to each other with piston cavity with connecting pipe through the air admission hole connecting pipe.
The left and right sides of anchor clamps connecting rod has slotted hole, and admission line and connecting pipe pass from the left and right sides slotted hole of anchor clamps connecting rod respectively.
Air admission hole connecting pipe and connecting pipe all are the soft pipeline that elastomeric material is processed.
Beneficial effect of the present invention is:
The present invention and traditional pipette are used, and can serve as rubber pipette bulb, and whole operation is safe, and process operation is simple, and the process of imbibition and dropping liquid can realize through one hand, and not be subject to operator's influence.
The present invention compares with high-end accuracy pipettor, simplicity of design, and low price can be popularized use in teaching and common laboratory, and can keep the precision of pipette.In addition, the precision of using this pipette to move liquid is that homemade pipettor is beyond one's reach.
Description of drawings
Fig. 1 is an overall structure profile of the present invention;
Fig. 2 is the part sectioned view of piston cavity;
Fig. 3 is the part sectioned view of three-jaw holder part;
Fig. 4 is an air admission hole part front cross-sectional view;
Fig. 5 is an air admission hole part vertical view;
Fig. 6 is an anchor clamps shaft portion side view.
The specific embodiment
Below in conjunction with accompanying drawing and implementation method the present invention is further described.
As shown in Figure 1, overall structure of the present invention is by piston handle 1, spring 2, breather check valve 3, exhaust check valve 4, piston 5; Piston rod 6, piston rod fixed muffle 7, piston cavity 8, connecting pipe 9, outer casing sleeve 10, anchor clamps connecting rod 11; Connecting rod joystick 12, three-jaw clamp base 13, seal sleeve 14, three-jaw anchor clamps 15, clamp spring 16; Air admission hole base 20, air admission hole connecting pipe 21, air admission hole loam cake 22, loam cake air admission hole 23, base air admission hole 24 is formed.
As shown in Figure 3; The major function of holder part is the fixing terminal and sealing contact position of pipette; This part is in whole crust of the device sleeve 10; And the three-jaw anchor clamps 15 that can move up and down that place head are arranged, the base 13 of these three-jaw anchor clamps is through an anchor clamps connecting rod 11 that can move up and down and 12 terminal connections of connecting rod joystick.When downwards on time at connecting rod joystick 12 places; Anchor clamps connecting rod 11 and three-jaw anchor clamps 15 integral body move down; The front end three-jaw opens under the elastic force effect; Can place the pipette end in these three-jaw anchor clamps 15 this moment, and closely be connected for the circular platform type rubber seal sleeve that Open Side Down with inner chamber, unclamps connecting rod joystick 12; Anchor clamps connecting rod 11 and three-jaw anchor clamps 15 move under the effect of clamp spring 16, and three pawls inwardly shrink under the inside radial load effect that shell applied respectively and clamping pipette end.
As shown in Figure 2, the major function of piston portion is to assist the pipette imbibition.Plunger shaft links to each other with the circular platform type inner chamber that Open Side Down through pipeline, and the reciprocating motion of piston 5 can suck pipette with liquid.The design of human natureization of the present invention is that piston 5 moves down when pressing piston handle 1 downwards, and breather check valve 3 is opened; Exhaust check valve 4 is closed, i.e. imbibition process, and piston 5 moves up under spring 2 elastic force effects when unclamping; Breather check valve 3 is closed, and exhaust check valve 4 is opened, and is piston 5 chamber exhaust processes; Repeat above-mentioned steps, after in pipette, sucking the liquid of capacity, just can stop to press piston handle 1.
Like Fig. 4; Shown in 5; The venting part is made up of a revolvable air admission hole loam cake 22 and a fixing air admission hole base 20 that has onesize eccentric circular hole that has eccentric circular hole; Air admission hole base 20 is fixed on the left side of outer casing sleeve 10, and its mouthful is provided with eccentric mount air admission hole 24, is rotary with air admission hole loam cake 22 above; Have eccentric loam cake air admission hole 23 on the air admission hole loam cake 22, the eccentric mount air admission hole 24 of air admission hole base 20 is threaded a pipe in succession through air admission hole connecting pipe 21 and 9 is linked to each other with piston cavity 8.During the rotation of eccentric circular hole on being positioned at lid with the eccentric circular hole overlapping of air admission hole base 20 or when overlapping; Whole pipeline just with the atmosphere conducting; This moment, pipette 19 interior liquid flowed out from pipette 19 mouths under the gravity effect; When treating that liquid level drops to needed scale or arranged all liquid fully, rotate air admission hole loam cake 22 again, close base air admission hole 24.Liquid flows out the size control of the speed of pipette 19 by base air admission hole 24 openings.
During concrete operations of the present invention, the first step is the arrangement of pipette 19.Operating personnel can the right hand (being generally strong hand) hold the outer casing sleeve 10 of whole device; For simplicity; The orientation of holding is the position that thumb is arranged in figure one piston handle 1, and forefinger places the position of air admission hole base 20, with convenient rotation steam vent loam cake 22.
Second step was the installation of pipette; Promptly press lower link joystick 12, whole connecting rod 11 and three-jaw anchor clamps 15 integral body move down in outer casing sleeve 10, and three-jaw anchor clamps 15 stretch out outer casing sleeve 10; Three-jaw anchor clamps head 18 can open under inner elastic force effect; At this moment, can be with pipette terminal 17 as in the three-jaw anchor clamps 15, and its rubber seal sleeve 14 with the circular platform type inner chamber that Open Side Down closely is connected; The effect of circular platform type inner chamber is can the pipette of different bores be inserted wherein, and can guarantee sealing preferably.After waiting to guarantee to connect closely; But left hand buttresses pipette 19; Slowly unclamp connecting rod joystick 12; Pipette 19, three-jaw anchor clamps 15 and anchor clamps connecting rod 11 are moved under the effect of clamp spring 16, and the special construction of three-jaw anchor clamps 15 can be clamped the end 17 of pipette under the radial load active force of outer casing sleeve.The head 18 of three-jaw anchor clamps is designed to and can to increase frictional force, prevents the pipette landing, and can reduce local stress that prevent that pipette from being clipped broken, whole anchor clamps head construction is shown in accompanying drawing three than the terminal face structure that closely contacts of large tracts of land and pipette.
The 3rd step is for imbibition, promptly after the installation of accomplishing above-mentioned pipette, just can pipette be stretched among the solution to be transferred, prepares to move liquid.At this moment, should check at first whether air admission hole 23 closes.If do not close, rotation air admission hole loam cake 22 is to position as shown in Figure 5, and promptly loam cake air admission hole 23 staggers with base air admission hole 24 fully, and can smear vaseline between the covers increases sealing.After waiting to guarantee that whole line seal is good, available thumb is pressed piston handle 1 downwards, and piston rod 6 moves down; Breather check valve 3 is opened, and exhaust check valve 4 is closed, and solution is the entering pipette under the atmospheric pressure effect; When piston 5 moves to extreme lower position, can unclamp piston handle 1, breather check valve 3 is closed; Exhaust check valve 4 is opened, and piston 5 and piston rod (6) are displaced downwardly to topmost in the effect of spring 2.Repeat above process, in pipette, reach the solution of predetermined, promptly accomplish the imbibition process this moment.
The 4th step was discharge opeing.The discharge opeing process can be accomplished through rotation air admission hole loam cake 22.Air admission hole (part sectioned view is as shown in Figure 4) is applicable to following two kinds of situation:
(1) promptly after accomplishing imbibition; Available right hand forefinger rotation air admission hole loam cake 22 overlaps with base air admission hole 24 up to loam cake air admission hole 23; Can regulate the size (degree that two openings overlap) of perforate according to the viscosity of solution, thereby control solution flows out the speed size of pipette.Treating that the pipette liquid level drops to needs scale, and surplus solution is the solution of required volume in the pipette, can once put into needed experimental ware.
(2) the control air admission hole also can be realized the gradation discharge opeing.After accomplishing imbibition; Write down liquid level scale in the initial pipette, and repeat the step in above-mentioned " ", treating that the pipette liquid level drops to needs scale; Promptly the difference of twice scale is the liquor capacity of emitting, and therefore controls the discharging that air admission hole can be realized once different amount solution.
The 5th step was the dismounting pipette.After discharge opeing was accomplished, available left hand was held pipette, and hand thumb is pressed lower link joystick 12; Treat that three-jaw anchor clamps 15 stretch out outer casing sleeve 10 fully; Three-jaw anchor clamps head 18 is an expansible, and can unload pipette and clean or install next pipette this moment, carries out next round and move liquid.
The connecting pipe 9 that the present invention will link to each other with three-jaw clamp base 13 with plunger shaft 8 is as in the anchor clamps connecting rod 11.Because anchor clamps connecting rod 11 can move up and down, therefore can the both sides of anchor clamps connecting rod 11 be designed to structure as shown in Figure 6, in order to avoid connecting pipe 9 and air admission hole connecting pipe 21 influence moving up and down of anchor clamps connecting rod.Specific embodiments is to be designed to slotted hole 25 shapes in the left and right sides of anchor clamps connecting rod 11, and admission line 21 and connecting pipe 9 are passed from the left and right sides respectively.In view of move needing, air admission hole connecting pipe 21 can adopt the soft pipeline of material such as rubber with connecting pipe 9.
In order to move the safety of liquid process; Can plunger shaft be designed to the slender type cavity as far as possible; In order to avoid the piston mobile phase is under the smaller situation; Amounts of solution gets into pipette, and the slender type cavity can guarantee to realize each relatively long piston motion distance, and more a spot of solution gets into pipette.In addition, the plunger shaft volume can be as far as possible little during design, promptly after repeating repeatedly imbibition, just can reach predetermined liquor capacity.Simultaneously, in using this device process, eyes will be observed the position of liquid level in the pipette constantly, prevent that imbibition is excessive and get into connecting pipe 9, pollute this liquid-transfering device.
Claims (3)
1. an assisting pipette to conveniently moves the device of liquid, comprises holder part, and piston portion and venting part is characterized in that:
Said holder part is in whole device case; Its head is provided with the three-jaw anchor clamps (15) that can move up and down; The rear end of three-jaw anchor clamps (15) is fixing by a cup dolly (13); The base of these anchor clamps (13) is connected through an anchor clamps connecting rod (11) that can move up and down and joystick (12) are terminal; Be provided with a seal sleeve (14) that is connected with its base (13) in the three-jaw anchor clamps (15), place clamp spring (16) between base (13) front end of three-jaw anchor clamps head (18) rear end and three-jaw anchor clamps;
Said piston portion is installed in the outer casing sleeve the inside; Piston (5) is connected with piston handle (1) through a piston rod (6) that passes piston rod fixed muffle (7); Piston (5) lower end and piston cavity (8) are placed spring (2) at the end; Piston cavity (8) upper end is provided with breather check valve (3) and exhaust check valve (4), and breather check valve (3) is positioned at the air inlet of piston cavity (8) and passes through connecting pipe (9) and is connected with three-jaw clamp base (13);
Said venting part is made up of a revolvable air admission hole loam cake (22) and a fixing air admission hole base (20) that has onesize eccentric circular hole that has eccentric circular hole; Air admission hole base (20) is fixed on a side relative with the piston handle of outer casing sleeve (10); And have an eccentric mount air admission hole (24); Be rotary with air admission hole loam cake (22) above; Have eccentric loam cake air admission hole (23) on the air admission hole loam cake (22), the eccentric mount air admission hole (24) of air admission hole base (20) links to each other with piston cavity (8) with connecting pipe (9) through admission line (21).
2. assisting pipette to conveniently according to claim 1 moves the device of liquid; It is characterized in that: the left and right sides of said anchor clamps connecting rod (11) has slotted hole (25), and admission line (21) and connecting pipe (9) pass from the left and right sides slotted hole (25) of anchor clamps connecting rod (11) respectively.
3. assisting pipette to conveniently according to claim 1 moves the device of liquid, it is characterized in that: said admission line (21) and connecting pipe (9) all are the soft pipeline that elastomeric material is processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101966482A CN101850279B (en) | 2010-06-10 | 2010-06-10 | Device for assisting pipette to conveniently transfer liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101966482A CN101850279B (en) | 2010-06-10 | 2010-06-10 | Device for assisting pipette to conveniently transfer liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101850279A CN101850279A (en) | 2010-10-06 |
| CN101850279B true CN101850279B (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101966482A Expired - Fee Related CN101850279B (en) | 2010-06-10 | 2010-06-10 | Device for assisting pipette to conveniently transfer liquid |
Country Status (1)
| Country | Link |
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| CN (1) | CN101850279B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103920547B (en) * | 2014-04-16 | 2015-08-19 | 浙江海洋学院 | Pipette servicing unit |
| CN110385153B (en) * | 2016-06-15 | 2022-05-17 | 汉密尔顿公司 | Pipetting device, pipette tip coupler and pipette tip: apparatus and method |
| EP3626343B1 (en) * | 2018-09-18 | 2023-12-13 | Eppendorf SE | Holding device for holding a pipetting container on a pipetting device |
| US11446672B2 (en) * | 2019-10-25 | 2022-09-20 | Mettler-Toledo Rainin, LLC | Powered positive displacement pipette syringe piston grasping mechanism |
| CN113413937A (en) * | 2020-09-27 | 2021-09-21 | 华能国际电力股份有限公司长兴电厂 | Prevent volatilizing and be convenient for move liquid storage device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2007607A1 (en) * | 1970-02-19 | 1971-09-02 | Heilenz S | Hand held semi-automatic pipette filler |
| CN2120617U (en) * | 1992-04-15 | 1992-11-04 | 吉春卿 | Automatic accurately easy controlled liquid transmission device |
| CN1248495A (en) * | 1998-09-22 | 2000-03-29 | 陈国君 | Quick adjustable pipette |
| CN2447765Y (en) * | 2000-09-05 | 2001-09-12 | 王振明 | Pipet |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3764762B2 (en) * | 1995-07-20 | 2006-04-12 | アロカ株式会社 | Pipette device |
| JP3750460B2 (en) * | 2000-02-18 | 2006-03-01 | 日立工機株式会社 | Dispensing device and dispensing method |
-
2010
- 2010-06-10 CN CN2010101966482A patent/CN101850279B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2007607A1 (en) * | 1970-02-19 | 1971-09-02 | Heilenz S | Hand held semi-automatic pipette filler |
| CN2120617U (en) * | 1992-04-15 | 1992-11-04 | 吉春卿 | Automatic accurately easy controlled liquid transmission device |
| CN1248495A (en) * | 1998-09-22 | 2000-03-29 | 陈国君 | Quick adjustable pipette |
| CN2447765Y (en) * | 2000-09-05 | 2001-09-12 | 王振明 | Pipet |
Non-Patent Citations (1)
| Title |
|---|
| JP特開平9-29111A 1997.02.04 |
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| CN101850279A (en) | 2010-10-06 |
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| CB03 | Change of inventor or designer information |
Inventor after: Li Guangtian Inventor after: Lin Chunhua Inventor after: Xiang Huazhong Inventor after: Shi Haowen Inventor after: Qiao Pei Inventor after: Chen Lan Inventor before: Li Guangtian |
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Free format text: CORRECT: INVENTOR; FROM: LI GUANGTIAN TO: LI GUANGTIAN LIN CHUNHUA XIANG HUAZHONG SHI HAOYUN QIAO PEI CHEN LAN |
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