CN102179269A - Precision finely adjustable liquid transfer device - Google Patents
Precision finely adjustable liquid transfer device Download PDFInfo
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- CN102179269A CN102179269A CN2011100895484A CN201110089548A CN102179269A CN 102179269 A CN102179269 A CN 102179269A CN 2011100895484 A CN2011100895484 A CN 2011100895484A CN 201110089548 A CN201110089548 A CN 201110089548A CN 102179269 A CN102179269 A CN 102179269A
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Abstract
The embodiment of the invention discloses a precision finely adjustable liquid transfer device, which comprises a liquid suction rod 20, a handle 13 serving as a shell, a fine adjustment rotary quantifying rod 1, an inner cavity 23 and a piston rod 17 in the inner cavity 23, and is characterized by also comprising a fixed display scale mirror 2 arranged on the handle 13 serving as a shell, wherein a sliding fine scale block 6 is arranged at a position, which is opposite to the position of the fixed display scale mirror, in the inner cavity 23; and the sliding fine scale block 6 move synchronously together with the fine adjustment rotary quantifying rod 1 and the piston rod 17. The precision finely adjustable liquid transfer device provided by the embodiment has high liquid transfer measurement precision and can eliminate accumulated error. Meanwhile, the structure of the liquid transfer device is simple, and the cost is relatively low.
Description
Technical field
The present invention relates to accurate measuring device field, relate in particular to the fine-tuning pipettor of a kind of precision.
Background technology
Pipettor is common instrument, the especially micropipettor in clinical diagnosis laboratory, Biotechnology Experiment chamber, pharmacy and chemical laboratory, environmental laboratory and the food laboratory, plays a very important role in meticulous experiment.Micropipettor is divided into quantitatively and adjustable two kinds, and existing fine-tuning pipettor specification has multiple, comprises the Volume Changes from 0.1ul ~ 5ml, satisfies conventional needs.But it is not high that it moves the liquid certainty of measurement, and to move the liquid measure error bigger because the long-term accumulated error of using causes.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of accurate fine-tuning pipettor simple in structure is provided, and improves and moves the precision that liquid is measured.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of precision fine-tuning pipettor, comprise imbibition bar 20, double handle 13, the quantitative bar 1 of fine setting rotation, the inner chamber 23 of shell and the piston rod 17 that places described inner chamber 23 done, it is characterized in that: also comprise the fixedly display scale mirror 2 that places on the described double handle 13 of doing shell, the position relative with described fixedly display scale mirror 2 positions at described inner chamber 23 is provided with slip microdial piece 6, and described slip microdial piece 6 rotates quantitative bar 1 with described fine setting and described piston rod 17 is synchronized with the movement.
Further, also comprise the vernier knob 5 that is connected with described slip microdial piece 6, the lower end of described vernier knob 5 is provided with fine setting spring 4, is used to regulate zero graduation on the described slip microdial piece 6 and the zero graduation on the described fixedly display scale mirror 2 and aligns.
Further, comprise also with described fine setting and rotate screw rod 11, the nut 12 that quantitative bar 1 matches and uses that described screw rod 11, nut 12 link to each other with piston seat 15 by push rod Connection Block 14, described piston rod 17 places on the described piston seat 15.
Further, described piston seat 15 belows are provided with back-moving spring 7 and excessive extrusion back-moving spring 9.
Further, also comprise the distance rod 21 that is used with described imbibition bar 20 that is sleeved on the described imbibition bar 20, be used for imbibition nozzle is taken off from described imbibition bar 20.
Further, adopt teflin ring 18 and " O " RunddichtringO 19 to carry out seal isolation between inner chamber 23 front ends of described pipettor and the rear end.
Further, the position of applying mechanically imbibition nozzle, the lower end of described imbibition bar 20 is provided with O RunddichtringO 22.
Further, described fixedly display scale mirror 2 each minimum scale lattice representative move the long-pending 5.0ul of liquid, and described slip microdial piece 6 each minimum scale lattice representative move the long-pending 0.25ul of liquid.
Implement the accurate fine-tuning pipettor that the embodiment of the invention provides, have following beneficial effect:
1, it moves liquid measure and is determined in the distance that the pipettor inner chamber moves by the piston rod of a no-float.Utilize the principle of air displacement, in pipettor, make to decide Cheng Yundong, produce negative pressure, suck quantitative liquid by piston rod.The parts of instrument itself are less, and are simple in structure, and it moves the liquid capacity and can show clearly in the fixedly display scale mirror of pipettor and slip microdial piece, can regulate and reach required capacity by the quantitative bar of manual adjustments fine setting rotation again.In range 0.5 ~ 10ul, theoretical certainty of measurement can reach 0.025ul, and available accuracy can reach 0.05ul.
2, be provided with vernier knob and the fine setting spring that is connected with described slip microdial piece, realized fine setting check and correction datum mark, eliminated the accumulated error that assembling, manufacturing etc. produce from structure.Simultaneously, also the check and correction datum mark be can finely tune, certainty of measurement and service life increased substantially the accumulated error that long-term use produces.
3, sealing ring fells and transports polytetrafluoroethylmaterial material, and the dynamic pressure sealing is to the equilibrium of piston rod radial pressure.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the fine-tuning pipettor internal structure of a precision provided by the invention schematic diagram;
Fig. 2 is the fixedly display scale mirror of the fine-tuning pipettor of precision provided by the invention and the positional structure schematic diagram of slip microdial piece.
The specific embodiment
The accurate fine-tuning pipettor that the embodiment of the invention provides moves liquid certainty of measurement height, and simultaneously, the fine-tuning pipettor of this precision is simple in structure, cost is low.
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Referring to Fig. 1, be the fine-tuning pipettor internal structure of precision provided by the invention schematic diagram, as shown in Figure 1, the fine-tuning pipettor of this precision comprises:
Have liquid sucting port imbibition bar 20, be sleeved on the distance rod 21 that is used with described imbibition bar 20 on the described imbibition bar 20, be sleeved on the double handle 13 of doing shell on the described distance rod 21, the quantitative bar 1 of fine setting rotation and rotate quantitative bar 1 and the described double handle 13 of doing shell surrounds the inner chamber 23 that forms by described fine setting.
The inner chamber 23 of described pipettor is a cavity, is divided into front end and rear end two parts, adopts teflin ring 18 and O RunddichtringO 19 to carry out seal isolation between described fore-end and the rear end part, and dynamic seal (packing) is reliable.Described fine setting is rotated the lower end of quantitative bar 1 and is stretched in the rear end part of described inner chamber 23, fixes with screw rod 11 in the described inner chamber 23, and described screw rod 11 screws in the nuts 12, and described nut 12 is embedded on the inwall of described handle 13 by interior pedestal 16.Piston rod 17 is arranged between the front end and rear end of described inner chamber 23, and is fixed on the piston seat 15, and described piston rod 17 can move back and forth in inner chamber 23.Described piston seat 15 is connected with described screw rod 11, described nut 12 by push rod Connection Block 14.Described screw rod 11, nut 12 match, and rotate quantitative bar 1 by described fine setting and are rotated in axial generation thrust, drive piston seat 15 and piston rod 17 motions.
Described piston seat 15 belows are provided with back-moving spring 7, zero-bit slide block 8 and excessive extrusion back-moving spring 9, and described back-moving spring 7 upwards has pressure all the time, eliminates axial rigging error; Described excessive extrusion back-moving spring 9 is used for being forced out and external force when disappearing when piston seat 15, utilizes elastic force by described zero-bit slide block 8 described piston seat 15 to be resetted.Described excessive extrusion back-moving spring 9 lower ends also are provided with pressure cover 10, are used for fixing the lower end of described excessive extrusion back-moving spring 9.
The described double handle 13 of doing shell is provided with fixedly display scale mirror 2, position relative with described fixedly display scale mirror 2 positions in described inner chamber 23 is provided with slip microdial piece 6, and the motion of described piston seat 15 and piston rod 17 drives described slip microdial piece 6 and is synchronized with the movement.Described slip microdial piece 6 also is provided with and is attached thereto the vernier knob 5 that connects and is connected slide block 3, the lower end of described vernier knob 5 is provided with fine setting spring 4, is used to regulate zero graduation on the described slip microdial piece 6 and the zero graduation on the described fixedly display scale mirror 2 and aligns.
Described imbibition bar 20 is connected with the front end of described inner chamber 23, and the position that imbibition nozzle is applied mechanically in the lower end of described imbibition bar 20 is provided with O RunddichtringO 22.The described distance rod 21 that is used with described imbibition bar 20 that is sleeved on the described imbibition bar 20 is used for imbibition nozzle is taken off from described imbibition bar 20.
Described fixedly display scale mirror 2 each minimum scale lattice representative move the long-pending 5.0ul of liquid, and described slip microdial piece 6 each minimum scale lattice representative move the long-pending 0.25ul of liquid, specifically see also shown in Figure 2.Certainly, also can be arranged to other volume number, it is long-pending more little that 6 each the minimum scale lattice representative of described slip microdial piece move liquid, and it is high more to represent described pipettor to move the liquid certainty of measurement.
Before the described pipettor of use moves liquid, put imbibition nozzle in the lower end of described imbibition bar 20.Operation when moving liquid is as follows:
Step 1, check whether zero graduation on the described slip microdial piece 6 and the zero graduation on the described fixedly display scale mirror 2 align, as not aligning, then I rotate described vernier knob 5 with screwdriver, zero graduation on the described slip microdial piece 6 and the zero graduation on the described fixedly display scale mirror 2 are aligned, if align, then directly carry out step 2.
Step 3 moves to imbibition nozzle on the application of sample chamber wall, slowly rotates described fine setting and rotates quantitative bar 1, until treating that suction liquid value is zero, loosens described fine setting again and rotates quantitative bar 1, makes it to reset, and has just finished the pipetting process one time.
After finishing using, press described handle 13, described distance rod 21 is moved downward, the removal imbibition nozzle is decontroled described handle 13 then, makes it to reset.
Implement the accurate fine-tuning pipettor that the embodiment of the invention provides, have following beneficial effect:
1, it moves liquid measure and is determined in the distance that the pipettor inner chamber moves by the piston rod of a no-float.Utilize the principle of air displacement, in pipettor, make to decide Cheng Yundong, produce negative pressure, suck quantitative liquid by piston rod.The parts of instrument itself are less, and are simple in structure, and it moves the liquid capacity and can show clearly in the fixedly display scale mirror of pipettor and slip microdial piece, can regulate and reach required capacity by the quantitative bar of manual adjustments fine setting rotation again.In range 0.5 ~ 10ul, theoretical certainty of measurement can reach 0.025ul, and available accuracy can reach 0.05ul.
2, be provided with vernier knob and the fine setting spring that is connected with described slip microdial piece, realized fine setting check and correction datum mark, eliminated the accumulated error that assembling, manufacturing etc. produce from structure.Simultaneously, also the check and correction datum mark be can finely tune, certainty of measurement and service life increased substantially the accumulated error that long-term use produces.
3, sealing ring fells and transports polytetrafluoroethylmaterial material, and the dynamic pressure sealing is to the equilibrium of piston rod radial pressure.
Above disclosed is a kind of preferred embodiment of the present invention only, can not limit the present invention's interest field certainly with this, and therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (8)
1. fine-tuning pipettor of precision, comprise imbibition bar (20), the double handle (13) of doing shell, fine setting rotation quantitative bar (1), inner chamber (23) and the piston rod (17) that places described inner chamber (23), it is characterized in that: also comprise the fixedly display scale mirror (2) that places on the described double handle (13) of doing shell, the position relative with described fixedly display scale mirror (2) position at described inner chamber (23) is provided with slip microdial piece (6), and described slip microdial piece (6) rotates quantitative bar (1) with described fine setting and described piston rod (17) is synchronized with the movement.
2. the fine-tuning pipettor of precision as claimed in claim 1, it is characterized in that: also comprise the vernier knob (5) that is connected with described slip microdial piece (6), the lower end of described vernier knob (5) is provided with fine setting spring (4), is used to regulate zero graduation on the described slip microdial piece (6) and the zero graduation on the described fixedly display scale mirror (2) and aligns.
3. the fine-tuning pipettor of precision as claimed in claim 2, it is characterized in that: also comprise with described fine setting and rotate screw rod (11), the nut (12) that quantitative bar (1) matches and uses, described screw rod (11), nut (12) link to each other with piston seat (15) by push rod Connection Block (14), and described piston rod (17) places on the described piston seat (15).
4. the fine-tuning pipettor of precision as claimed in claim 3 is characterized in that: described piston seat (15) below is provided with back-moving spring (7) and excessive extrusion back-moving spring (9).
5. the fine-tuning pipettor of precision as claimed in claim 2 is characterized in that: also comprise the distance rod (21) that is used with described imbibition bar (20) that is sleeved on the described imbibition bar (20), be used for imbibition nozzle is taken off from described imbibition bar (20).
6. the fine-tuning pipettor of precision as claimed in claim 2 is characterized in that: adopt teflin ring (18) and O RunddichtringO (19) to carry out seal isolation between inner chamber 23 front ends of described pipettor and the rear end.
7. the fine-tuning pipettor of precision as claimed in claim 2 is characterized in that: the position that imbibition nozzle is applied mechanically in the lower end of described imbibition bar (20) is provided with O RunddichtringO (22).
8. the fine-tuning pipettor of precision as claimed in claim 2, it is characterized in that: each minimum scale lattice representative of described fixedly display scale mirror (2) moves the long-pending 5.0ul of liquid, and each minimum scale lattice representative of described slip microdial piece (6) moves the long-pending 0.25ul of liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110089548 CN102179269B (en) | 2011-04-11 | 2011-04-11 | Precision finely adjustable liquid transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110089548 CN102179269B (en) | 2011-04-11 | 2011-04-11 | Precision finely adjustable liquid transfer device |
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| CN102179269A true CN102179269A (en) | 2011-09-14 |
| CN102179269B CN102179269B (en) | 2013-04-24 |
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| CN 201110089548 Active CN102179269B (en) | 2011-04-11 | 2011-04-11 | Precision finely adjustable liquid transfer device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698824A (en) * | 2012-06-07 | 2012-10-03 | 林昂 | Novel liquid transfer device |
| CN110152750A (en) * | 2018-03-20 | 2019-08-23 | 苏州朝霞生物科技有限公司 | A kind of hand-held pipettor of multi-purpose type |
| CN111408418A (en) * | 2019-01-07 | 2020-07-14 | 苏州赛尼特格尔实验室科技有限公司 | Electronic pipettor and precision control method thereof |
| CN112098149A (en) * | 2019-06-17 | 2020-12-18 | 中肯(苏州)计量检测技术有限公司 | Liquid sampling, metering and detecting device |
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| CN201086016Y (en) * | 2007-08-28 | 2008-07-16 | 大龙医疗设备(上海)有限公司 | Multi-gear fast liquid shifter |
| US20080223108A1 (en) * | 2007-03-13 | 2008-09-18 | Masashi Kobayashi | Pipette and sealing mechanism for plunger |
| CN201329284Y (en) * | 2008-11-14 | 2009-10-21 | 赵化欣 | Precise quantitative liquid transfer device with electronic timing function |
| WO2011025399A2 (en) * | 2009-08-28 | 2011-03-03 | PZ HTL Spółka Akcyjna | Mechanical pipette with adjustable volume value of aspirated liquid |
| CN202015624U (en) * | 2011-04-11 | 2011-10-26 | 深圳市博卡生物技术有限公司 | Accuracy fine-tunable pipettor |
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2011
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Patent Citations (6)
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| US20080223108A1 (en) * | 2007-03-13 | 2008-09-18 | Masashi Kobayashi | Pipette and sealing mechanism for plunger |
| CN201055776Y (en) * | 2007-04-23 | 2008-05-07 | 杨正刚 | Rapid adjustable liquid shifter |
| CN201086016Y (en) * | 2007-08-28 | 2008-07-16 | 大龙医疗设备(上海)有限公司 | Multi-gear fast liquid shifter |
| CN201329284Y (en) * | 2008-11-14 | 2009-10-21 | 赵化欣 | Precise quantitative liquid transfer device with electronic timing function |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698824A (en) * | 2012-06-07 | 2012-10-03 | 林昂 | Novel liquid transfer device |
| CN110152750A (en) * | 2018-03-20 | 2019-08-23 | 苏州朝霞生物科技有限公司 | A kind of hand-held pipettor of multi-purpose type |
| CN110152750B (en) * | 2018-03-20 | 2021-08-13 | 鹤壁市人民医院 | Multi-purpose handheld pipettor |
| CN111408418A (en) * | 2019-01-07 | 2020-07-14 | 苏州赛尼特格尔实验室科技有限公司 | Electronic pipettor and precision control method thereof |
| CN112098149A (en) * | 2019-06-17 | 2020-12-18 | 中肯(苏州)计量检测技术有限公司 | Liquid sampling, metering and detecting device |
| CN112098149B (en) * | 2019-06-17 | 2022-07-19 | 中肯(苏州)计量检测技术有限公司 | Liquid sampling, metering and detecting device |
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| CN102179269B (en) | 2013-04-24 |
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