CN215996716U - Low absorption filter core suction head of pipettor - Google Patents
Low absorption filter core suction head of pipettor Download PDFInfo
- Publication number
- CN215996716U CN215996716U CN202122551643.3U CN202122551643U CN215996716U CN 215996716 U CN215996716 U CN 215996716U CN 202122551643 U CN202122551643 U CN 202122551643U CN 215996716 U CN215996716 U CN 215996716U
- Authority
- CN
- China
- Prior art keywords
- cavity
- suction head
- cavities
- head body
- liquid
- 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.)
- Active
Links
- 238000010521 absorption reaction Methods 0.000 title abstract description 7
- 238000001179 sorption measurement Methods 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 238000005213 imbibition Methods 0.000 claims abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 229920001903 high density polyethylene Polymers 0.000 claims description 14
- 239000004700 high-density polyethylene Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000001746 injection moulding Methods 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 55
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000000443 aerosol Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 206010011409 Cross infection Diseases 0.000 description 4
- 206010029803 Nosocomial infection Diseases 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000005034 decoration Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004166 bioassay Methods 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to a pipettor low adsorption filter core suction head, including the suction head body, be equipped with interface and imbibition mouth on the top of suction head body and the bottom respectively, the inside anti-backflow mechanism that is equipped with of suction head body, anti-backflow mechanism includes sleeve, spherical cock body and spring, the sleeve inside is two coaxial and cylindrical first cavities and the second cavity of inequality, the diameter of first cavity is greater than the diameter of second cavity and first cavity is located the top of second cavity, pass through divergent formula round platform shape third cavity transitional coupling between first cavity and the second cavity, be equipped with the backup pad on the top of first cavity, be equipped with the through-hole on the backup pad, be equipped with the filter core on the second cavity bottom, the cock body passes through the spring to be connected with the backup pad, the diameter of cock body is less than the aperture of first cavity, and it is greater than the aperture of second cavity; the utility model discloses effectively solve the liquid that current pipettor suction head made the absorption easily and produce the backward flow phenomenon, lead to getting the volume inaccurate, cause the pollution easily, influence the problem of experimental result.
Description
Technical Field
The utility model relates to a biological assay equipment technical field especially relates to a pipettor hangs down adsorbs filter core suction head.
Background
A pipette, also called a pipette, is a device for quantitatively transferring liquid, and is used for precisely sucking liquid in many experiments of biology and chemistry, and when performing research on analysis and testing, the pipette is generally used to suck a small amount or trace amount of liquid, and a suction head is an accessory used in the process of sucking liquid by matching with the pipette, and is also a component which has a great influence on the liquid sucking effect.
At present, the prior pipette tip has a plurality of defects in the process of liquid suction: when liquid is sucked in a laboratory, a small amount of liquid is always remained in the suction head, the liquid remained on the inner wall of the suction head flows back to the tip end of the suction head and finally flows out of the suction head, and the liquid generates a backflow phenomenon due to the self gravity and the fluidity, so that the liquid is inaccurate in taking amount, is easy to cause pollution and affects the experimental result.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pipettor hangs down and adsorbs filter core suction head to prior art's not enough, through the cooperation design of suction head body, sleeve, cock body and spring, effectively solve the liquid that current pipettor suction head made the absorption easily and produce the backward flow phenomenon, lead to getting the volume inaccurate, cause the pollution easily, influence the problem of experimental result.
The utility model discloses the technical scheme who adopts:
a pipette suction head with low adsorption filter element comprises a suction head body, wherein the top and the bottom of the suction head body are respectively provided with a connector and a liquid suction port, the suction head body is internally provided with a backflow prevention mechanism which comprises a sleeve, a spherical plug body and a spring, the sleeve is internally provided with a first cylindrical cavity and a second cylindrical cavity which are coaxial and have different diameters, the diameter of the first cavity is larger than that of the second cavity, the first cavity is positioned above the second cavity, the first cavity and the second cavity are in transition connection through a third cavity in a gradually expanding type round table shape, a supporting plate is arranged on the top of the first cavity, a plurality of through holes which are uniformly arranged are arranged on the supporting plate, a filter element is arranged on the bottom of the second cavity, the plug body is arranged in the sleeve and connected with the support plate through a spring, and the diameter of the plug body is smaller than the aperture of the first cavity and larger than the aperture of the second cavity.
Further, the filter element comprises a high density polyethylene layer and an activated carbon layer, wherein the activated carbon layer is arranged on the top of the high density polyethylene layer.
Furthermore, the aperture of the high-density polyethylene layer and the aperture of the activated carbon layer are both 1-100 microns.
Furthermore, the thickness of the high-density polyethylene layer and the thickness of the activated carbon layer are both 2-3 mm.
Furthermore, a plurality of flaky reinforcing ribs are circumferentially arranged on the outer part of the suction head body.
Furthermore, at least six reinforcing ribs are arranged.
Furthermore, the suction head body is designed to be of a conical structure, and the suction head body is integrally formed by injection molding of transparent plastics.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses simple structure, convenient to use, it is better to prevent the refluence effect, through the cooperation design of suction head body, sleeve, cock body and spring, effectively solves the liquid that current pipettor suction head made the absorption easily and produces the backward flow phenomenon, leads to getting the volume inaccurate, causes the pollution easily, influences the problem of experimental result.
2. The filter core sets up on the bottom of second cavity, utilizes the aerosol that the filter core can effectively the separation liquid, prevents that the aerosol from getting into the pipettor, causes cross infection, and the design of filter core can give the certain buffering of suction simultaneously, can stabilize the absorption liquid of buffering more, convenient operation.
3. The inner part of the sleeve is under the action of suction force, and the plug body is tightly sealed with the top of the second cavity under the action of the spring, so that the plug body is pulled up by the suction force to open the top of the second cavity, and at the moment, the plug body is far away from the top of the second cavity, and the second cavity is communicated with the first cavity through the third cavity, so that normal liquid suction operation is realized; and the sleeve loses the suction effect and does all can, and the cock body removes to original position under the spring action, utilizes the cock body to seal the top of second cavity, can effectively prevent to remain liquid and lead the refluence, improves the efficiency of experiment, reduces the experiment and pollutes, ensures the accuracy of experiment.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic structural view of the backflow prevention mechanism of the present invention;
fig. 4 is a schematic structural view of the filter element of the present invention;
fig. 5 is a top view of the support plate of the present invention;
in the figure: 1. a suction head body; 2. a liquid suction port; 3. reinforcing ribs; 4. an interface; 5. a backflow prevention mechanism; 6. a first cavity; 7. a third cavity; 8. a second cavity; 9. a filter element; 10. a plug body; 11. a spring; 12. a support plate; 13. a through hole; 14. a sleeve; 15. a high density polyethylene layer; 16. and an activated carbon layer.
Detailed Description
In order to better understand the technical content of the present invention, the following embodiments are provided, and the present invention is further described with reference to the accompanying drawings.
Referring to fig. 1 to 5, the utility model provides a pipettor low adsorption filter core suction head, including a suction head body 1, the top and the bottom of the suction head body 1 are respectively provided with an interface 4 and a liquid suction port 2, a worker holds the pipettor vertically, inserts the joint of the pipettor into the interface 4 of the suction head body 1, while pressing down gently, the pipettor in hand rotates anticlockwise, so that the suction head body 1 can be tightly fixed on the pipettor, the structure between the pipettor and the suction head body 1 is firm and stable, the quick butt joint is realized, the joint pollution of the pipettor is prevented, the liquid can be sucked quickly to carry out the liquid-transferring operation, then the liquid suction port 2 of the suction head body 1 is invaded into the liquid surface vertically, the invasion liquid surface does not need to be too deep, otherwise, a certain influence is generated on the liquid-sucking precision, a backflow-preventing mechanism 5 is arranged inside the suction head body 1, the liquid can be effectively prevented through the backflow-preventing mechanism 5, the backflow prevention mechanism 5 comprises a sleeve 14, a spherical plug body 10 and a spring 11, the sleeve 14 is installed inside the suction head body 1, the sleeve 14 is internally provided with a first cavity 6 and a second cavity 8 which are coaxial and unequal, the first cavity 6 and the second cavity 8 are respectively of a cylindrical structure, the diameter of the first cavity 6 is larger than that of the second cavity 8, the first cavity 6 is positioned above the second cavity 8, the first cavity 6 and the second cavity 8 are in transitional connection through a gradually expanding third cavity 7, the third cavity 7 is of a circular truncated cone structure, a support plate 12 is arranged on the top of the first cavity 6, a plurality of through holes 13 which are uniformly arranged are arranged on the support plate 12, the through holes 13 are of a circular structure, liquid in the first cavity 6 passes through the through holes 13 and flows into the pipette, a filter element 9 is arranged on the bottom of the second cavity 8, the filter element 9 can effectively block aerosol of the liquid, prevent that aerosol from getting into the pipettor, cause cross infection, filter core 9's design can give the certain buffering of suction simultaneously, can stabilize the absorption liquid of buffering more, convenient operation, cock body 10 sets up and is connected bottom spring 11 and backup pad 12 inside sleeve 14, cock body 10's diameter is less than first cavity 6's aperture, ensure that cock body 10 can move in first cavity 6 is inside, and cock body 10's diameter is greater than second cavity 8's aperture, cock body 10 closely seals with second cavity 8's top under spring 11's the spring action, make the liquid reflux process obstructed, further reach the effect that prevents the liquid refluence, the utility model discloses can effectively prevent the inside liquid reflux of suction head body 1, and can guarantee that the inside liquid of suction head body 1 does not have external impurity, ensure the accuracy of experiment.
Specifically, the filter element 9 comprises a high density polyethylene layer 15 and an activated carbon layer 16, the activated carbon layer 16 being arranged on top of the high density polyethylene layer 15; the high-density polyethylene layer 15 has a hydrophobic effect and can effectively block aerosol; the activated carbon layer 16 has adsorption capacity and can adsorb aerosol, so that the aerosol is further blocked, and cross contamination caused by the fact that the aerosol enters the pipettor is avoided.
Specifically, the aperture of the high-density polyethylene layer 15 and the aperture of the activated carbon layer 16 are both 1-100 μm.
Specifically, the thickness of the high-density polyethylene layer 15 and the thickness of the activated carbon layer 16 are both 2-3 mm.
Specifically, a plurality of sheet-shaped reinforcing ribs 3 are circumferentially arranged on the outer part of the suction head body 1; the strength and the hardness of the suction head body 1 can be effectively enhanced through the reinforcing ribs 3.
Specifically, at least six reinforcing ribs 3 are provided.
Specifically, the suction head body 1 is designed to be in a conical structure, and the suction head body 1 is integrally formed by injection molding through transparent plastics; the specific conditions inside the suction head body 1 can be observed conveniently.
The utility model discloses a theory of operation does:
when sucking liquid, a worker firstly takes the sterilized sucker body 1, fixes the interface 4 of the sucker body 1 with a joint of a liquid transfer device, and makes the liquid suction port 2 of the sucker body 1 invade into the liquid level, and when sucking liquid, because the liquid transfer device is in a negative pressure state, negative pressure is generated inside the sucker body 1, so that the suction effect is generated inside the sleeve 14, since the plug 10 is tightly sealed with the top of the second chamber 8 by the spring 11, the plug 10 is pulled by the suction force to open the top of the second chamber 8, and at this time, the plug body 10 is far away from the top of the second cavity 8, the second cavity 8 is communicated with the first cavity 6 through the third cavity 7, the normal liquid suction operation is realized, the liquid flows to the inner part of the suction head body 1 from the liquid suction port 2, then the liquid flows through the second cavity 8, the third cavity 7 and the first cavity 6 in sequence, and finally the liquid enters the liquid transfer device; when the sleeve 14 has no suction effect, the plug body 10 moves to the original position under the action of the spring 11, the top of the second cavity 8 is sealed by the plug body 10, the liquid inside the suction head body 1 is effectively prevented from flowing back, and the backflow prevention effect on the liquid is realized.
Meanwhile, in the process of liquid suction, aerosol is generated due to the flowing of liquid, enters the liquid transfer device along with a channel formed by negative pressure and is diffused finally, and when the next sample is sucked, the aerosol of the liquid enters the next liquid sample, so that cross infection among the liquid samples is caused; therefore, the aerosol of liquid can be effectively blocked by utilizing the filter element 9, the aerosol is prevented from entering the pipettor, cross infection is caused, meanwhile, the design of the filter element 9 can give certain buffering to suction force, the buffered liquid can be more stably sucked, and the operation is convenient.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The utility model provides a pipettor hangs down adsorbs filter core suction head, includes the suction head body, is equipped with interface and imbibition mouth, its characterized in that on the top of suction head body and the bottom respectively: the suction head is characterized in that a backflow preventing mechanism is arranged inside the suction head body and comprises a sleeve, a spherical plug body and a spring, two coaxial cylindrical first cavities and two cylindrical second cavities which are different in diameter are formed inside the sleeve, the diameter of each first cavity is larger than that of each second cavity, the first cavities are located above the second cavities, the first cavities and the second cavities are connected through gradually-expanding circular truncated cone-shaped third cavities in a transitional mode, a supporting plate is arranged on the top of each first cavity, a plurality of uniformly-arranged through holes are formed in the supporting plate, a filter element is arranged on the bottom of each second cavity, the plug body is arranged inside the sleeve and connected with the supporting plate through the spring, the diameter of the plug body is smaller than that of the first cavity, and the diameter of the plug body is larger than that of the second cavity.
2. The pipette low sorption cartridge tip of claim 1, wherein: the filter core includes high density polyethylene layer and activated carbon layer, activated carbon layer sets up on the top on high density polyethylene layer.
3. The pipette low sorption cartridge tip of claim 2, wherein: the aperture of the high-density polyethylene layer and the aperture of the activated carbon layer are both 1-100 mu m.
4. The pipette low sorption cartridge tip of claim 3, wherein: the thickness of the high-density polyethylene layer and the thickness of the activated carbon layer are both 2-3 mm.
5. The pipette low sorption cartridge tip of claim 1, wherein: the outer part of the suction head body is circumferentially provided with a plurality of flaky reinforcing ribs.
6. The pipette low sorption cartridge tip of claim 5, wherein: at least six reinforcing ribs are arranged.
7. The pipette low sorption cartridge tip of claim 1, wherein: the suction head body is designed to be of a conical structure, and is integrally formed by transparent plastic in an injection molding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122551643.3U CN215996716U (en) | 2021-10-22 | 2021-10-22 | Low absorption filter core suction head of pipettor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122551643.3U CN215996716U (en) | 2021-10-22 | 2021-10-22 | Low absorption filter core suction head of pipettor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215996716U true CN215996716U (en) | 2022-03-11 |
Family
ID=80587048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122551643.3U Active CN215996716U (en) | 2021-10-22 | 2021-10-22 | Low absorption filter core suction head of pipettor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215996716U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117181328A (en) * | 2023-09-21 | 2023-12-08 | 浙江中在医疗科技有限公司 | A pipette low-adsorption filter tip |
-
2021
- 2021-10-22 CN CN202122551643.3U patent/CN215996716U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117181328A (en) * | 2023-09-21 | 2023-12-08 | 浙江中在医疗科技有限公司 | A pipette low-adsorption filter tip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208302810U (en) | Piston type liquid-transfering device | |
| CN215996716U (en) | Low absorption filter core suction head of pipettor | |
| CN114859068A (en) | Kit and POCT blood cell analyzer | |
| CN209123953U (en) | An analytical pipetting aid | |
| CN204562186U (en) | A kind of instrument backflow preventing structure and comprise the blood taking needle of this structure of taking a blood sample | |
| CN212370236U (en) | Commonality moves liquid suction nozzle | |
| CN111992262A (en) | Disposable quantitative pipette | |
| CN102269768B (en) | Cleaning swab and application thereof to haemal cell analyzer | |
| CN210632145U (en) | Micro-fluidic chip anchor clamps | |
| CN103759977A (en) | Negative pressure type acquisition device for urine sample | |
| CN209595786U (en) | Integrated device is examined in a kind of urine collecting and storage | |
| CN217568798U (en) | Water-sucking and dripping head | |
| CN218885517U (en) | Dual-purpose micro-sampler | |
| CN109875574B (en) | Medical treatment clinical laboratory uses blood sampler | |
| CN211609812U (en) | A separate vacuum blood collection tube | |
| CN220715904U (en) | Suction device capable of preventing suction shortage for chemical test | |
| CN222197015U (en) | Centrifugal-free EP (EP) pipe | |
| CN221889927U (en) | A new type of pipette | |
| CN219111656U (en) | Pipette head | |
| CN205317537U (en) | Urine cup of urine sampler | |
| CN222076643U (en) | Notch type suction head | |
| CN217189667U (en) | Simple separating funnel type centrifuge tube | |
| CN112345025A (en) | Liquid level detection device and liquid-transfering gun | |
| CN219441725U (en) | Suction head grabbing assembly and pipetting mechanism with suction head grabbing assembly | |
| CN223614847U (en) | Swab sampler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |