CN217410822U - Device for transferring test samples in batches - Google Patents
Device for transferring test samples in batches Download PDFInfo
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- CN217410822U CN217410822U CN202221055994.3U CN202221055994U CN217410822U CN 217410822 U CN217410822 U CN 217410822U CN 202221055994 U CN202221055994 U CN 202221055994U CN 217410822 U CN217410822 U CN 217410822U
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Abstract
The utility model provides a device for shift testing sample in batches belongs to food detection technology field. The device for transferring the test samples in batches comprises at least one test tube tray unit and at least one pipetting unit, wherein the test tube tray unit comprises a first tray for placing test tubes A containing samples to be transferred and a second tray for placing empty test tubes B. The liquid transfer unit comprises a first plug group and a second plug group, wherein the first plug group can be positioned right above the first tray, the second plug group can be positioned right above the second tray, the first plug group consists of a plurality of first test tube plugs, and the first test tube plugs are connected with an air inlet pipe and a sample discharge pipe; the second plug group comprises a plurality of second test tube plugs, the second test tube plugs are connected with an exhaust pipe and a sample feeding pipe, and the sample feeding pipe is connected with a sample discharging pipe. The batch transfer of samples can be completed only by controlling the ventilation of the air inlet pipe, so that the operation efficiency is improved, and the problems of unsmooth liquid taking and liquid leakage do not exist.
Description
Technical Field
The utility model belongs to the technical field of food detection, in particular to a device for shifting sample detection in batches.
Background
The edible oil is an important component of food and is a seasoning essential for daily life of people. Among them, plasticizers such as phthalate esters (diethyl phthalate (DEP), dibutyl phthalate (DBP), butyl phthalate (BBP), di (2-ethylhexyl) phthalate (DEHP), di-n-octyl phthalate (DnOP)), which are not linked to plastic polymers through chemical bonds and are fat-soluble substances, are liable to enter edible oil during production, storage, etc., resulting in contamination of edible oil.
In order to search key transfer nodes of the plasticizer in the edible oil, sampling is carried out on each key node in the production of the edible oil, and the content of the plasticizer in each node sample is detected according to a detection method shown in 'determination method of phthalate in export food' (SN/T3147-2017) so as to judge the migration rule of the plasticizer. The specific detection method comprises the following steps: weighing about 0.5g of sample in a 10mL glass scale test tube, adding 3mL of acetonitrile, adding 0.1mL of n-hexane, carrying out vortex mixing for 1min, adding 0.6g of anhydrous magnesium sulfate and 0.15g of sodium acetate, carrying out vortex mixing for 3min, centrifuging, transferring the supernatant into another test tube, adding 25mg of PSA powder, 25mgC18 powder and 75mg of anhydrous magnesium sulfate, carrying out vortex mixing for 1min, centrifuging at 3000r/min for 5min, transferring the supernatant into another clean test tube, blowing nitrogen to dry, accurately transferring 2mL of n-hexane for redissolving, and analyzing by GC-MC.
In the detection process, at least two supernatant liquid transferring processes and one nitrogen drying process need to be finished. At present, in the laboratory, the transfer of supernatant is mainly moved through laboratory technician operation pipette and is got, and when waiting to detect sample quantity when more, laboratory technician work load is great, and the operating efficiency is lower. Among the prior art, for example, chinese utility model patent that patent number is 202022280356.9 discloses a can move pipettor of getting reagent in batches, but the fly leaf through liftable removal drives the piston rod that sets up on a row of liquid-transfering cylinder and wholly reciprocates along liquid-transfering cylinder inner wall, realizes once only shifting a plurality of samples. However, the above-described pipettes that can remove reagents in bulk have problems in two respects:
the first process of transferring the sample solution comprises two processes of transferring the solution into the liquid transfer cylinder and transferring the solution out of the liquid transfer cylinder, the sample solution is required to be arranged in order in the transferring process, and the operation process is complicated.
Secondly, after long-time use, the sealing performance between the piston rod and the inner wall of the liquid cylinder is poor, so that liquid is taken out smoothly or liquid leaks in the transfer process.
Disclosure of Invention
Based on the above, the invention provides a device for transferring detection samples in batches, which is used for solving the technical problems that the operation process is complicated and the phenomena of unsmooth liquid taking or liquid leakage are easy to occur when sample solutions are transferred in batches in the prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
an apparatus for bulk transfer of test samples, comprising:
at least one test tube tray unit that can be lifted in a vertical direction; the test tube tray unit comprises a first tray for placing a test tube A filled with a sample to be transferred and a second tray for placing an empty test tube B, and a plurality of test tube grooves for placing test tubes are formed in the first tray and the second tray; and
the liquid transfer unit comprises a first plug group and a second plug group, the first plug group can be located right above the first tray, the second plug group can be located right above the second tray, the first plug group consists of a plurality of first test tube plugs, and the first test tube plugs are connected with air inlet pipes and sample discharge pipes; the second plug group consists of a plurality of second test tube plugs, the second test tube plugs are connected with an exhaust pipe and a sample feeding pipe, and the sample feeding pipe is connected with the sample discharging pipe;
when the first tray is lifted upwards, the sample discharge pipe can extend into the bottom of the test tube A placed on the first tray.
Preferably, at least one of the test tube tray units is disposed in parallel, and at least one of the pipetting units is movable above the test tube tray unit in a direction perpendicular to the arrangement direction of the test tube tray units.
Preferably, the apparatus for transferring test samples in batches further comprises a lifting plate, and the test tube tray unit is fixedly arranged on the lifting plate; the lifting plate is provided with a driving mechanism for driving the lifting plate to lift along the vertical direction.
Preferably, the apparatus for transferring test samples in bulk further comprises a washing unit disposed in parallel with the test tube tray unit; the washing unit comprises a third tray for placing a test tube C filled with washing liquid and a fourth tray for placing a test tube D filled with washing waste liquid.
Preferably, a gas pressure equalizer is connected to the plurality of gas inlet pipes.
Preferably, the first test tube plug and the second test tube plug are arranged in a circular truncated cone shape.
Preferably, the bottom of the first test tube plug and the bottom of the second test tube plug are provided with liquid layer height adjusting tubes, and the liquid layer height adjusting tubes can stretch out and draw back along the vertical direction.
Preferably, the bottom of liquid layer altitude mixture control pipe is provided with test tube contact site, test tube contact site is the setting of horn mouth shape.
Preferably, the liquid layer height adjusting pipe is a compressible bellows.
Preferably, the device for transferring test samples in batches further comprises a control system for realizing automatic lifting of the test tube tray unit and/or for realizing automatic pipetting of the pipetting unit.
Compared with the prior art, the utility model discloses at least, following advantage has:
set up test tube tray unit and move liquid unit, move liquid unit includes first stopper group and second stopper group, and test tube tray unit can upwards lift up the test tube of placing on it to make the test tube with first stopper group and the contact of second stopper group, and make first test tube stopper, second test tube stopper and the test tube lid that corresponds the position close, form relatively sealed space in the test tube, set up in the lower extreme of the sample discharging pipe on the first test tube stopper is located the position of waiting to take a sample of sample. Through setting up intake pipe on the first test tube stopper lets in gas to the test tube, and the sample is under the atmospheric pressure effect, through the sample discharging pipe with the sample inlet pipe shifts to accomplish the transfer operation of sample. Compare the tradition and use the pipette to carry out the device that the sample moved and got, the utility model provides a device for shifting the detection sample in batches only need control in the in-service use process ventilating of intake pipe can shift in order to accomplish the batch of sample, has improved the operating efficiency, and does not have the problem that gets liquid and leak smoothly.
Drawings
FIG. 1 is a schematic structural diagram of an apparatus for transferring test samples in batch in one embodiment.
FIG. 2 is a top view of an apparatus for bulk transfer of test samples in one embodiment.
Fig. 3 is a schematic sectional view taken along the line a-a in fig. 2.
Fig. 4 is a schematic structural diagram of a first test tube plug (a second test tube plug) in an embodiment.
In the figure: the device 10 for transferring test samples in batch, the test tube tray unit 100, the first tray 110, the second tray 120, the test tube well 101, the pipetting unit 200, the first plug set 210, the first test tube plug 211, the air inlet tube 212, the sample outlet tube 213, the gas pressure equalizer 214, the second plug set 220, the second test tube plug 221, the air outlet tube 222, the sample inlet tube 223, the lifting plate 300, the driving mechanism 310, the washing unit 400, the third tray 410, the fourth tray 420, the liquid layer height adjusting tube 500, and the test tube contact portion 510.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The following will combine the drawings of the embodiments of the present invention to further describe the technical solution of the present invention, and the present invention is not limited to the following specific embodiments.
It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar parts. In the description of the present invention, it should be understood that if there are the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limiting the patent, and those skilled in the art can understand the specific meaning of the terms according to the specific situation.
In one embodiment, referring to fig. 1-3, an apparatus 10 for batch transfer of test samples is used to batch transfer of sample solutions during an experiment. The apparatus 10 for transferring test samples in batches comprises at least one test tube tray unit 100 and at least one pipetting unit 200. The test tube tray unit 100 can be lifted and lowered in the vertical direction. The test tube tray unit 100 comprises a first tray 110 for placing a test tube a containing a sample to be transferred and a second tray 120 for placing an empty test tube B, and a plurality of test tube slots 101 for placing test tubes are formed in the first tray 110 and the second tray 120. The pipetting unit 200 comprises a first plug group 210 capable of being positioned right above the first tray 110 and a second plug group 220 capable of being positioned right above the second tray 120, wherein the first plug group 210 comprises a plurality of first test tube plugs 211, and the first test tube plugs 211 are connected with an air inlet pipe 212 and a sample discharge pipe 213. The second plug set 220 is composed of a plurality of second test tube plugs 221, the second test tube plugs 221 are connected with an exhaust pipe 222 and a sample feeding pipe 223, and the sample feeding pipe 223 is connected with the sample discharging pipe 213. When the first tray 110 is lifted upward, the sample discharging pipe 213 can be inserted into the bottom of the test tube a placed on the first tray 110.
In one embodiment, the pipetting unit 200 is fixedly disposed right above the test tube tray unit 100, and the first and second test tube stoppers 211 and 221 are in one-to-one correspondence with the test tube slots 101 disposed on the first and second trays 110 and 120, and each group of the corresponding test tube tray unit 100 and pipetting unit 200 can be used to complete batch transfer of a group of samples.
Preferably, at least one of the test tube tray units 100 is disposed in parallel, and at least one of the pipetting units 200 is movable above the test tube tray unit 100 in a direction perpendicular to the arrangement direction of the test tube tray unit 100. Further, the number of the pipetting units 200 is smaller than the number of the test tube tray units 100, and the pipetting units 200 move above the test tube tray units 100 to complete batch transfer of multiple sets of samples with one pipetting unit 200. For example, the number of the pipetting units 200 is 1, and one pipetting unit 200 moves above the test tube tray unit 100 to perform batch transfer of a plurality of sets of samples.
The test tube tray unit 100 may be lifted in a vertical direction in various ways, for example, the test tube tray unit 100 may be lifted by a lifting mechanism provided above the test tube tray unit 100. Preferably, the apparatus 10 for transferring test samples in batches further includes a lifting plate 300, and the test tube tray unit 100 is fixedly disposed on the lifting plate 300. Be provided with on the board 300 of lifting and be used for the drive the actuating mechanism 310 that the board 300 of lifting goes up and down along vertical direction, for example, actuating mechanism 310 is cylinder or hydro-cylinder, and the output of cylinder or hydro-cylinder is connected the bottom of the board 300 of lifting, or the symmetric connection is in the both sides of the board 300 of lifting, when the output of cylinder or hydro-cylinder is connected during the both sides of the board 300 of lifting, cylinder or hydro-cylinder can set up the top of the board 300 of lifting to when making cylinder or hydro-cylinder retract, mention board 300 of lifting.
In the above embodiment, when a batch transfer of samples is required (for example, when exploring migration nodes of a plasticizer in edible oil, at least 10 to 20 groups of samples are processed simultaneously, after the plasticizer is extracted with a solvent and impurities are removed, centrifugation is performed, and centrifuged supernatant is transferred for further processing), a test tube a containing a sample to be transferred is placed on the first tray 110, a test tube B containing a sample to be transferred is placed on the second tray 120, and the position of the test tube B corresponds to the position of the test tube a. Moving the pipetting unit 200 to a position directly above the first tray 110 and the second tray 120, the first tray 110 and the second tray 120 are lifted up, so that the first test tube stopper 211 is covered with the test tube a, and the second test tube stopper 221 is covered with the test tube B. At this time, the lower end of the sample discharge pipe 213 is located below the liquid level of the sample in the test tube a, and the lower end of the sample discharge pipe 213 can be located at a desired sampling position by controlling the liquid level of the sample in the test tube a or by adjusting the position of the lower end of the sample discharge pipe 213. The air inlet pipe 212 is filled with gas, such as compressed nitrogen or compressed air, air pressure is generated in the test tube A, and a sample to be transferred is discharged into the test tube B through the sample discharge pipe 213 and the sample feed pipe 223 under the action of pressure, so that batch transfer of the sample is completed, the operation is simple, the working efficiency is greatly improved, and the liquid leakage phenomenon in the sample transfer process is effectively avoided.
In some cases, when it is desired to transfer a predetermined amount or all of the sample, it is possible to adjust the lower end of the sample discharge pipe 213 to a proper position. At this time, when the sample is transferred, gas enters the sample discharging pipe 213 and the sample feeding pipe 223, and purging of residual sample in the sample discharging pipe 213 and the sample feeding pipe 223 is completed, so that accurate transfer of the sample is realized.
Under some circumstances, when the sample in the test tube B needs to be dried by air, the air is continuously introduced, the operation can be completed, an independent process is not required to be set, the operation efficiency is further improved, and the operation intensity is reduced.
In a preferred embodiment, the apparatus 10 for batch transfer of test samples further comprises a washing unit 400, the washing unit 400 being arranged in parallel with the test tube tray unit 100; the washing unit 400 includes a third tray 410 for holding test tubes C containing washing liquid and a fourth tray 420 for holding test tubes D containing washing waste liquid. After completing the sample transfer, if the sample discharge pipe 213 and the sample feed pipe 223 need to be cleaned, the pipetting unit 200 is moved to a position right above the washing unit 400, and the sample transfer process is repeated, so that the washing liquid passes through the sample discharge pipe 213 and the sample feed pipe 223, the washing is completed, and the gas phase is used for drying.
In an embodiment, the plurality of air inlet pipes 212 are connected to an air pressure equalizer 214, and air firstly passes through the air pressure equalizer 214 and then enters the plurality of air inlet pipes 212, so that the air pressure received by each test tube a containing a sample to be transferred is equal, the synchronism of sample transfer is maintained, and the operation accuracy of sample transfer operation is improved.
In a preferred embodiment, the first test tube plug 211 and the second test tube plug 221 are disposed in a circular truncated cone shape, so that the first test tube plug 211 and the second test tube plug 221 can be covered on test tubes with any specification, thereby improving the applicability of the pipetting unit 200.
Referring to fig. 4, in a preferred embodiment, in order to adjust the position of the lower end of the sample discharging pipe 213, liquid layer height adjusting pipes 500 are provided at the bottoms of the first and second test tube stoppers 211 and 221, and the liquid layer height adjusting pipes 500 are vertically retractable. For example, the liquid layer height adjusting pipe 500 is a compressible bellows pipe. Further, the bottom of liquid layer altitude mixture control pipe 500 is provided with test tube contact portion 510, test tube contact portion 510 is the setting of horn mouth shape.
In the process of lifting the first tray 110 and the second tray 120 upward, the upper end of the cuvette thereon first comes into contact with the cuvette contact part 510 and compresses the liquid layer height adjusting tube 500 until the lower end of the sample discharge tube 213 reaches a predetermined position. At this time, the liquid layer height adjusting tube 500, the test tube contact portion 510, and the test tube form a relatively closed space, and gas is introduced into the space under the gravity action of the test tube contact portion 510, so that pressure for transferring the sample can be formed.
Preferably, the cuvette contact part 510 is made of rubber or resin material to improve sealing performance between the cuvette and the cuvette contact part 510.
In one embodiment, to realize the automatic batch transfer of samples, the apparatus 10 for batch transfer of test samples further comprises a control system for realizing the automatic lifting of the test tube tray unit 100 and/or for realizing the automatic pipetting of the pipetting unit 200.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An apparatus for transferring test samples in bulk, comprising:
at least one test tube tray unit capable of being lifted and lowered in a vertical direction; the test tube tray unit comprises a first tray for placing a test tube A filled with a sample to be transferred and a second tray for placing an empty test tube B, and a plurality of test tube grooves for placing test tubes are formed in the first tray and the second tray; and
the liquid transfer unit comprises a first plug group and a second plug group, the first plug group can be located right above the first tray, the second plug group can be located right above the second tray, the first plug group consists of a plurality of first test tube plugs, and the first test tube plugs are connected with air inlet pipes and sample discharge pipes; the second plug group consists of a plurality of second test tube plugs, the second test tube plugs are connected with an exhaust pipe and a sample feeding pipe, and the sample feeding pipe is connected with the sample discharging pipe;
when the first tray is lifted upwards, the sample discharge pipe can extend into the bottom of the test tube A placed on the first tray.
2. The apparatus for transferring test samples in batches according to claim 1, wherein at least one of the tube tray units is disposed in parallel, and at least one of the pipetting units is movable above the tube tray unit in a direction perpendicular to the arrangement direction of the tube tray units.
3. The apparatus for transferring test samples in batches according to claim 1, further comprising a lifting plate on which the test tube tray unit is fixedly disposed; the lifting plate is provided with a driving mechanism for driving the lifting plate to lift along the vertical direction.
4. The apparatus for transferring test samples in batches according to any of claims 1 to 3, further comprising a washing unit disposed in parallel with the test tube tray unit; the washing unit comprises a third tray for placing a test tube C filled with washing liquid and a fourth tray for placing a test tube D filled with washing waste liquid.
5. The apparatus according to claim 1, wherein a gas pressure equalizer is connected to the plurality of gas inlet pipes.
6. The apparatus of claim 1, wherein the first and second plugs are disposed in a circular truncated row.
7. The apparatus for transferring assay samples in batch according to claim 1, wherein the bottom of the first and second test tube stoppers is provided with a liquid layer height adjusting tube, which is capable of being extended and retracted in a vertical direction.
8. The apparatus for transferring test samples in batches as set forth in claim 7, wherein the liquid layer height adjusting tube is provided at a bottom thereof with a test tube contact part, and the test tube contact part is formed in a bell-mouth shape.
9. The apparatus for transferring test samples in batches as set forth in claim 7, wherein the liquid layer height adjusting tube is a compressible bellows.
10. The apparatus for batch transfer of test samples according to claim 1, further comprising a control system for effecting automatic lifting of the tube tray unit and/or for effecting automatic pipetting of the pipetting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221055994.3U CN217410822U (en) | 2022-05-05 | 2022-05-05 | Device for transferring test samples in batches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221055994.3U CN217410822U (en) | 2022-05-05 | 2022-05-05 | Device for transferring test samples in batches |
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| Publication Number | Publication Date |
|---|---|
| CN217410822U true CN217410822U (en) | 2022-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221055994.3U Active CN217410822U (en) | 2022-05-05 | 2022-05-05 | Device for transferring test samples in batches |
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| Country | Link |
|---|---|
| CN (1) | CN217410822U (en) |
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- 2022-05-05 CN CN202221055994.3U patent/CN217410822U/en active Active
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