CN101571119A - Micro sample-adding pump - Google Patents
Micro sample-adding pump Download PDFInfo
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- CN101571119A CN101571119A CNA2009100519192A CN200910051919A CN101571119A CN 101571119 A CN101571119 A CN 101571119A CN A2009100519192 A CNA2009100519192 A CN A2009100519192A CN 200910051919 A CN200910051919 A CN 200910051919A CN 101571119 A CN101571119 A CN 101571119A
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- sleeve
- suction nozzle
- sample
- adding pump
- micro sample
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Abstract
The invention discloses a micro sample-adding pump, which comprises a pump body and a gun head arranged at the lower end of the pump body. A sleeve cylinder capable of sliding along the gun head up and down is arranged outside the gun head. The sample-adding pump also comprises a sleeve position detecting device connected with the pump body. The micro sample-adding pump can detect the situation of dropping off of a sucker in real time; when the sucker drops off, the sample-adding pump can react correspondingly and provides reliable insurance for sampling and adding samples; and simultaneously, the sample-adding pump replaces manual monitoring.
Description
Technical field
The present invention is used for medical equipment or laboratory automation equipment, is a kind of micro sample-adding pump that shifts in order to micro updating liquid specifically.
Background technique
Sample-adding pump is the usefulness that R﹠D institution laboratory or hospital inspection section office replace liquid.When the unitary sampling amount is extremely small when handling sample in enormous quantities, very high requirement has been proposed for application of sample personnel and relevant loading device.In order to reduce error and to prevent cross infection, China's application 200610026040.9 discloses a kind of like this by micro-processor controlled micro sample-adding pump, mainly is made up of motor, drive lead screw, piston, the sliding sleeve that is connected as a single entity from top to bottom successively, rifle head, suction nozzle removal cover, suction nozzle.Motor can drive drive lead screw and move up and down, and what wherein suction nozzle adopted is disposable tip, and suction nozzle is removed cover and is fixed on the pump place of close rifle head on one's body, when motor runs to specified position, remove cover and withstood suction nozzle, drive lead screw continues to move upward, and can destroy suction nozzle.Working principle is as follows: after suction nozzle enters liquid to be transferred, motor moves a certain distance according to the command control screw mandrel, formed pressure difference between piston, the suction nozzle that is used and the liquid that will take a sample this moment, thereby liquid is drawn onto in the middle of the suction nozzle, the whole then pump housing breaks away from liquid, because the suction nozzle port is very little, the surface tension of liquid has guaranteed that liquid that can not spills, then suction nozzle is moved to the place that needs application of sample, motor moves a certain distance according to the command control screw mandrel once more, thereby accurately liquid is got.In whole sampling, application of sample process, liquid rests in the suction nozzle all the time, does not directly contact with pump housing miscellaneous part.After application of sample is finished, can also destroy suction nozzle, avoided washing problems.On sample-adding pump, also be provided with optoelectronic switch and pressure transducer, be respectively applied for and judge the motor origin position and detect liquid level.Sampling precision is by microcomputer control.
Piston connects the rifle head, and suction nozzle and rifle head are drive fit, but this drive fit is not absolute reliable.Because whether this micro sample-adding pump can't detect suction nozzle in real time and come off, in case suction nozzle drops, microcomputer can not be made respective reaction.Whether real-time monitoring suction nozzle comes off from the rifle head is the critical function that an automated fluid distributes.The different phase that suction nozzle might drop and shift at liquid, if after suction nozzle drops, microcomputer does not find that suction nozzle comes off, and continues " blindly " work, will directly cause the application of sample failure.
Summary of the invention
The problem to be solved in the present invention provides and detects whether the come off micro sample-adding pump of function of suction nozzle a kind of having, this sample-adding pump can be monitored the suction nozzle situation in real time, and corresponding information is passed to microcomputer, and guaranteed the quality that liquid shifts, overcome the defective that exists in the prior art.
The present invention is by the following technical solutions:
A kind of micro sample-adding pump comprises the pump body and is located at the rifle head of pump body lower end, is provided with the sleeve that can slide up and down along the rifle head outside the rifle head, comprises that also a sleeve position detecting device is connected with described pump body.
Preferably, also have groove on the rifle head outer wall, sleeve lining is provided with projection, and described projection matches with groove.
Preferably, described groove is an annular groove.
Further, between the upper-end surface of groove and projection, also be with stage clip.
Preferably, described sleeve position detecting device comprises a photoelectric sensor and the baffle plate that is located on the sleeve, and when sleeve slided up and down, described baffle plate can trigger described photoelectric sensor.
Further, be fixed with circuit board on one's body at pump, described photoelectric sensor is positioned on the circuit board.
Further, also have suction nozzle to be placed in rifle head lower end, contact with sleeve.
Sleeve is placed on the rifle head, and the projection of sleeve can move up and down in the groove on the rifle head, and suction nozzle tightly is placed in the end of rifle head.Before suction nozzle did not put, sleeve was in extreme lower position.After suction nozzle put, the suction nozzle holder sleeve and is moved up, and made sleeve arrive a higher position; In a single day suction nozzle comes off, and sleeve is conducted oneself with dignity or extreme lower position is got back in the effect of Returnning spring.Therefore, can judge whether suction nozzle comes off from the rifle head, and the sleeve position detecting device passes to controller with the position signal of sleeve, can judge suction nozzle whether on the rifle head according to the position of sleeve.
This shows that the present invention can detect the suction nozzle dropping situations in real time, in case suction nozzle drops, sample-adding pump can be made respective reaction, for sampling, application of sample provide reliable guarantee, has replaced manual monitoring simultaneously.
Description of drawings
Fig. 1 is the structural representation after the suction nozzle of micro sample-adding pump puts.
Fig. 2 is the schematic representation after the suction nozzle of micro sample-adding pump drops.
Fig. 3 is the enlarged view of Fig. 1 centre circle A.
Embodiment
See Fig. 1, micro sample-adding pump comprises pump body 1, sleeve 2, circuit board 6, suction nozzle 4.Wherein pump body 1 mainly comprises screw mandrel 11, piston 12 and the rifle head 13 that connects successively, and rifle head 13 is in the lower end of pump body 1.Screw mandrel 11 is as actuator.Sleeve 2 is enclosed within on the rifle head 13, can slide up and down along rifle head 13, but can not rotate.The lower end of rifle head 13 can the disposable common suction nozzle 4 of socket, is used to draw sample, and suction nozzle 4 merges with rifle head 13 close-fittings and contacts with the lower end of sleeve 2.
In conjunction with Fig. 3, rifle head 13 outer walls are provided with annular groove 14, be with stage clip 3 on the annular groove 14, sleeve 2 inwalls are provided with projection 21, and projection 21 is stuck in the annular groove 14, stage clip 3 one ends withstand on the upper-end surface 15 of annular groove 14, the other end withstands on the projection 21, so projection 21 can slide up and down for 14 li at annular groove, (does not overlap suction nozzle) under free state, stage clip 3 leans against on the lower end surface of annular groove 14 projection 21, and sleeve 2 is in extreme lower position; After suction nozzle put, the suction nozzle holder sleeve and is moved up, and stage clip 3 is compressed, and made sleeve arrive a higher position.The outside, upper end of sleeve 2 is provided with outstanding baffle plate 22, and nailed circuit plate 6 on the pump body 1 has control circuit and photoelectric sensor 5 on the circuit board 6.When baffle plate 22 moves up and down with sleeve 2, photoelectric sensor 5 can be triggered, photoelectric sensor 5 (its position is in 5 scopes that can respond to of photoelectric sensor) can be contacted, also can be away from photoelectric sensor 5 (not in this detection range).Be sleeve 2 when different positions, photoelectric sensor 5 produces different electrical signal, baffle plate 22 and photoelectric sensor 5 have just constituted a sleeve position detecting device like this.The sleeve position detecting device also can adopt other form, such as adopting position limit switch, can contact the trip switch when sleeve 2 moves up; Also can adopt displacement transducer, respond to the position of sleeve, this class device is a known technology, repeats no more.
By detecting the position of sleeve, just can judge suction nozzle and whether come off from the rifle head.Before suction nozzle 4 did not put, sleeve 2 was on the position minimum in the annular groove 14, and baffle plate 22 is away from photoelectric sensor 5.After suction nozzle 4 is enclosed within on the rifle head, suction nozzle 4 is asking sleeve 2 to move up, baffle plate 22 with on move and trigger photoelectric sensor 5, the electrical signal that photoelectric sensor 5 produces shows that this moment, suction nozzle was installed normal, but micro sample-adding pump proper functioning, stage clip 3 compressive deformations in this moment annular groove 14, but since the frictional force between suction nozzle 4 and the rifle head 13 greater than the restoring force of stage clip 3, suction nozzle 4 can not come off; If suction nozzle 4 does not entangle firm and comes off, sleeve 2 is subjected to the effect of stage clip 3 restoring forces to get back to extreme lower position, see Fig. 2, this moment, baffle plate 22 and then moved down together, leave the detection range of photoelectric sensor 5, the electrical signal of photoelectric sensor generation 5 this moment shows that suction nozzle comes off, and micro sample-adding pump can in time be reported to the police and be adjusted working state.
After application of sample finished, the available draw-in groove that is fixed on the instrument removed suction nozzle, because the width of draw-in groove less than the diameter of suction nozzle, can make suction nozzle come off when going up by draw-in groove from descending.
This shows that the present invention can detect suction nozzle 4 dropping situations in real time, in case suction nozzle 4 drops, sample-adding pump can be made respective reaction, for sampling, application of sample provide reliable guarantee, has replaced manual monitoring simultaneously.
Claims (7)
1. micro sample-adding pump, comprise pump body (1) and be located at the rifle head (13) of pump body (1) lower end, it is characterized in that: outside rifle head (13), be provided with the sleeve (2) that can slide up and down along rifle head (13), comprise that also a sleeve position detecting device is connected with described pump body (1).
2. micro sample-adding pump according to claim 1 is characterized in that: also have groove on rifle head (13) outer wall, sleeve (2) inwall is provided with projection (21), and described projection (21) matches with groove.
3. micro sample-adding pump according to claim 2 is characterized in that: described groove is annular groove (14).
4. micro sample-adding pump according to claim 3 is characterized in that: also be with stage clip (3) between the upper-end surface (15) of groove and projection (21).
5. micro sample-adding pump according to claim 1, it is characterized in that: described sleeve position detecting device comprises a photoelectric sensor and the baffle plate (22) that is located on the sleeve (2), when sleeve (2) when sliding up and down, described baffle plate (22) can trigger described photoelectric sensor.
6. micro sample-adding pump according to claim 5 is characterized in that: be fixed with circuit board (6) on pump body (1), described photoelectric sensor is positioned on the circuit board (6).
7. according to each described micro sample-adding pump of claim 1-6, it is characterized in that: also have suction nozzle (4) to be placed in rifle head (13) lower end, contact with described sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100519192A CN101571119B (en) | 2009-05-25 | 2009-05-25 | Micro sample-adding pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100519192A CN101571119B (en) | 2009-05-25 | 2009-05-25 | Micro sample-adding pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101571119A true CN101571119A (en) | 2009-11-04 |
| CN101571119B CN101571119B (en) | 2012-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100519192A Active CN101571119B (en) | 2009-05-25 | 2009-05-25 | Micro sample-adding pump |
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| Country | Link |
|---|---|
| CN (1) | CN101571119B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103575925A (en) * | 2013-11-14 | 2014-02-12 | 宋筱亮 | Sample injection needle with automatic detection function |
| CN104279146A (en) * | 2013-07-01 | 2015-01-14 | 达成生物科技(苏州)有限公司 | Liquid sucking and discharging device |
| CN108490205A (en) * | 2018-04-10 | 2018-09-04 | 深圳市博辰智控有限公司 | A kind of microwell plate sample adding system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2158081Y (en) * | 1992-12-12 | 1994-03-02 | 李东方 | Multi-function sampler for liquid |
| JP4271835B2 (en) * | 2000-08-18 | 2009-06-03 | アークレイ株式会社 | Pipette device |
| CN2795074Y (en) * | 2005-04-26 | 2006-07-12 | 林添大 | Spray pump with dust-proof cover |
| CN100549412C (en) * | 2006-04-25 | 2009-10-14 | 上海凯实生物科技有限公司 | A kind of gas displacement type band removes the micro-sampling pump of suction head apparatus automatically |
-
2009
- 2009-05-25 CN CN2009100519192A patent/CN101571119B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104279146A (en) * | 2013-07-01 | 2015-01-14 | 达成生物科技(苏州)有限公司 | Liquid sucking and discharging device |
| CN104279146B (en) * | 2013-07-01 | 2017-02-22 | 苏州达成生物科技股份有限公司 | Liquid sucking and discharging device |
| CN103575925A (en) * | 2013-11-14 | 2014-02-12 | 宋筱亮 | Sample injection needle with automatic detection function |
| CN103575925B (en) * | 2013-11-14 | 2015-04-01 | 宋筱亮 | Sample injection needle with automatic detection function |
| CN108490205A (en) * | 2018-04-10 | 2018-09-04 | 深圳市博辰智控有限公司 | A kind of microwell plate sample adding system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101571119B (en) | 2012-06-06 |
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Owner name: JIAXING QUEST LIFE SCIENCE CO., LTD. Free format text: FORMER OWNER: SHANGHAI KAISHI BIOTECHNOLOGY CO., LTD. Effective date: 20121129 |
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Free format text: CORRECT: ADDRESS; FROM: 200433 YANGPU, SHANGHAI TO: 314006 JIAXING, ZHEJIANG PROVINCE |
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Effective date of registration: 20121129 Address after: Jiaxing City, Zhejiang province 314006 Ling Gong Tang Road No. 3339, building six, floor 3 Patentee after: Jiaxing Quest Life Science Co., Ltd. Address before: 200433 room 7009A, building 1, No. 335, National Road, Shanghai, Yangpu District Patentee before: Shanghai Kaishi Biotechnology Co., Ltd. |
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Address after: 3 / F, building 1, 2-3 / F, building 2, No. 3535 linggongtang Road, Nanhu District, Jiaxing City, Zhejiang Province, 314001 Patentee after: Jiaxing Kaishi Biotechnology Co.,Ltd. Address before: 3 / F, building 6, 3339 linggongtang Road, Jiaxing City, Zhejiang Province Patentee before: JIAXING QUEST BIOTECHNOLOGY Co.,Ltd. |
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