CN102179269B - Precision finely adjustable liquid transfer device - Google Patents
Precision finely adjustable liquid transfer device Download PDFInfo
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- CN102179269B CN102179269B CN 201110089548 CN201110089548A CN102179269B CN 102179269 B CN102179269 B CN 102179269B CN 201110089548 CN201110089548 CN 201110089548 CN 201110089548 A CN201110089548 A CN 201110089548A CN 102179269 B CN102179269 B CN 102179269B
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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 a kind of accuracy fine-tunable pipettor.
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 experiment chamber, 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 from the change in volume of 0.1 μ l ~ 5ml, satisfies conventional needs.But it is not high that it moves the liquid certainty of measurement, and to move the liquid measure error larger 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 accuracy fine-tunable 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 accuracy fine-tunable 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;
Described accuracy fine-tunable pipettor also comprises vernier knob 5 and the connection sliding block 3 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 for regulating 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 5.0 μ l of liquid, and described slip microdial piece 6 each minimum scale lattice representative move the long-pending 0.25 μ l of liquid.
Implement the accuracy fine-tunable 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 air exhausting principle in generation, in pipettor, make to decide Cheng Yundong by piston rod, produce negative pressure, suck quantitative liquid.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 ~ 10 μ l, theoretical certainty of measurement can reach 0.025 μ l, and available accuracy can reach 0.05 μ l.
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 from structure, eliminated the accumulated error that assembling, manufacturing etc. produce.Simultaneously, also the check and correction datum mark be can finely tune to the accumulated error that long-term use produces, certainty of measurement and service life increased substantially.
3, sealing ring fells and transports polytetrafluoroethylmaterial material, and the dynamic pressure sealing is balanced to the 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, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is accuracy fine-tunable pipettor internal structure schematic diagram provided by the invention;
Fig. 2 is the fixedly display scale mirror of accuracy fine-tunable pipettor provided by the invention and the positional structure schematic diagram of slip microdial piece.
The specific embodiment
The accuracy fine-tunable pipettor that the embodiment of the invention provides moves liquid certainty of measurement height, and simultaneously, this accuracy fine-tunable pipettor 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 obtains under the creative work prerequisite.
Referring to Fig. 1, be accuracy fine-tunable pipettor internal structure schematic diagram provided by the invention, as shown in Figure 1, this accuracy fine-tunable pipettor comprises:
With the imbibition bar 20 of liquid sucting port, 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 encloses the inner chamber 23 that forms by described fine setting.
The inner chamber 23 of described pipettor is 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 during the external force disappearance, utilizing elastic force by described zero-bit slide block 8 described piston seat 15 to be resetted when piston seat 15.Described excessive extrusion back-moving spring 9 lower ends also are provided with pressure cover 10, are used for the lower end of fixing 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 vernier knob 5 and the connection sliding block 3 that connects, the lower end of described vernier knob 5 is provided with fine setting spring 4, is used for regulating 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 5.0 μ l of liquid, and described slip microdial piece 6 each minimum scale lattice representative move the long-pending 0.25 μ l of liquid, specifically see also shown in Figure 2.Certainly, also can be arranged to other volume number, it is long-pending less that 6 each the minimum scale lattice representative of described slip microdial piece move liquid, and representing described pipettor, to move the liquid certainty of measurement higher.
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 2, rotate described fine setting and rotate quantitative bar 1 land in the position, measured point, it is adjusted to the position for the treatment of liquid sucking-discharging scale of construction value, again imbibition nozzle is invaded and moved 2 ~ 3mm place below the liquid levels, slowly loosen again described fine setting and rotate quantitative bar 1, make it to reset, wait was taken out described pipettor after 2 ~ 3 seconds from liquid, just finished the imbibition process one time.
After finishing using, press described handle 13, described distance rod 21 is moved downward, then the removal imbibition nozzle decontrols described handle 13, makes it to reset.
Implement the accuracy fine-tunable 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 air exhausting principle in generation, in pipettor, make to decide Cheng Yundong by piston rod, produce negative pressure, suck quantitative liquid.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 ~ 10 μ l, theoretical certainty of measurement can reach 0.025 μ l, and available accuracy can reach 0.05 μ l.
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 from structure, eliminated the accumulated error that assembling, manufacturing etc. produce.Simultaneously, also the check and correction datum mark be can finely tune to the accumulated error that long-term use produces, certainty of measurement and service life increased substantially.
3, sealing ring fells and transports polytetrafluoroethylmaterial material, and the dynamic pressure sealing is balanced to the piston rod radial pressure.
Above disclosed is a kind of preferred embodiment of the present invention only, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (7)
1. accuracy fine-tunable pipettor, 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;
Described accuracy fine-tunable pipettor also comprises vernier knob (5) and the connection sliding block (3) 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 for regulating zero graduation on the described slip microdial piece (6) and the zero graduation on the described fixedly display scale mirror (2) and aligns.
2. accuracy fine-tunable pipettor as claimed in claim 1, 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).
3. accuracy fine-tunable pipettor as claimed in claim 2 is characterized in that: be provided with back-moving spring (7) and excessive extrusion back-moving spring (9) below the described piston seat (15).
4. accuracy fine-tunable pipettor as claimed in claim 1 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).
5. accuracy fine-tunable pipettor as claimed in claim 1 is characterized in that: adopt teflin ring (18) and O RunddichtringO (19) to carry out seal isolation between the inner chamber of described pipettor (23) front end and the rear end.
6. accuracy fine-tunable pipettor as claimed in claim 1, it 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).
7. accuracy fine-tunable pipettor as claimed in claim 1, it is characterized in that: each minimum scale lattice representative of described fixedly display scale mirror (2) moves the long-pending 5.0 μ l of liquid, and each minimum scale lattice representative of described slip microdial piece (6) moves the long-pending 0.25 μ l 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 CN102179269A (en) | 2011-09-14 |
| CN102179269B true CN102179269B (en) | 2013-04-24 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102698824A (en) * | 2012-06-07 | 2012-10-03 | 林昂 | Novel liquid transfer device |
| 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 |
| 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 |
| CN114682317A (en) * | 2020-12-31 | 2022-07-01 | 苏州赛尼特格尔实验室科技有限公司 | Novel mechanical pipettor |
| CN114682318A (en) * | 2020-12-31 | 2022-07-01 | 苏州赛尼特格尔实验室科技有限公司 | Mechanical pipettor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| PL220934B1 (en) * | 2009-08-28 | 2016-01-29 | PZ HTL Spółka Akcyjna | Mechanical pipette with adjustable value of the volume of drawn 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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