CN215029034U - Automatic liquid transfer device based on weighing - Google Patents
Automatic liquid transfer device based on weighing Download PDFInfo
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- CN215029034U CN215029034U CN202120892791.9U CN202120892791U CN215029034U CN 215029034 U CN215029034 U CN 215029034U CN 202120892791 U CN202120892791 U CN 202120892791U CN 215029034 U CN215029034 U CN 215029034U
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- liquid
- injection pump
- liquid outlet
- weighing
- control valve
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- 239000007788 liquid Substances 0.000 title claims abstract description 135
- 238000005303 weighing Methods 0.000 title claims description 16
- 238000012546 transfer Methods 0.000 title description 7
- 238000002347 injection Methods 0.000 claims abstract description 27
- 239000007924 injection Substances 0.000 claims abstract description 27
- 230000005484 gravity Effects 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000002699 waste material Substances 0.000 claims description 25
- 238000001802 infusion Methods 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000011550 stock solution Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of move the liquid equipment, a automatic move liquid device based on weigh is provided, mainly include syringe pump, sample tray and controller: one end of the injection pump is provided with a liquid inlet pipeline and a liquid outlet pipeline which are respectively communicated with a first control valve and a second control valve; a servo motor is arranged corresponding to the injection pump, a follow-up screw rod is arranged at the output end of the servo motor, and a piston of the injection pump is in threaded transmission connection with the follow-up screw rod; the sample tray is provided with a gravity sensor and is arranged corresponding to the liquid outlet end of the liquid outlet pipeline, and a plurality of sample vessels are loaded on the sample tray; the controller comprises a main control board, and the servo motor and the gravity sensor are electrically connected with the main control board. The utility model discloses can effectively ensure the liquid-transfering precision when carrying out the liquid-transfering operation to volatile liquid, improve experimental data's accuracy to the simple operation.
Description
Technical Field
The utility model belongs to the technical field of move the liquid equipment, concretely relates to move liquid device automatically based on weigh.
Background
The pipetting step is one of the most basic experimental operations in scientific experiments, and the experimental operator usually uses a pipette gun or a pipette to realize quantitative transfer of liquid. Wherein, the air replacement formula pipette realizes imbibition and flowing back operation through the removal of piston in the pipette, and the pipette adopts intraductal scale volume to get quantitative volume liquid, and the reuse finger presses the pipette and maintains the gas tightness. The two methods both adopt the principle of atmospheric pressure difference, and utilize tiny vacuum in the pipe to prevent the sucked liquid from flowing downwards, thereby realizing the transfer of the liquid. However, in the two methods, a section of air exists between the liquid and the sealing part, and the volatilization of volatile liquid (such as organic solution and volatile acid) is easy to change the difference between the internal and external atmospheric pressures to make the liquid flow out, so that inaccurate data is easily caused when the two methods are used for pipetting the volatile liquid. The external piston type liquid-transfering gun adopts the piston to directly contact with liquid, and has no intermediate air section, so that the transfer of volatile/non-volatile liquid can be realized, but because the gun head structure of the external liquid-transfering gun is more complex, the price is higher, the experimental cost is increased, more materials are required for manufacturing the gun head of the type, and the burden of the environment is also increased.
On the other hand, when the pipette is used for operation, the operation efficiency is very low because manual reading is required every time. The working efficiency of using the pipette is higher than that of a pipettor, but the pipette is reset through a spring, so that metal fatigue is easily caused after repeated use, and errors are caused to experimental results. Meanwhile, when a large batch or ultra-large batch of samples are analyzed, a considerable part of experiment time is occupied by repeated and mechanical pipetting operation, so that pretreatment time occupies 60-70% of the whole experiment time, the experiment efficiency is seriously influenced, and the experiment progress is delayed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above shortcoming of prior art, the utility model aims at providing an automatic move liquid device based on weigh to effectively ensure to the volatile liquid move the liquid precision of moving when moving the liquid operation, improve experimental data's accuracy, and the simple operation.
The utility model provides a technical scheme that its technical problem adopted is:
a weight-based automatic pipetting device comprising:
the injection pump is provided with a liquid inlet pipeline and a liquid outlet pipeline in a communication mode at one end, a first control valve is arranged between the liquid inlet pipeline and the injection pump in a communication mode, and a second control valve is arranged between the injection pump and the liquid outlet pipeline in a communication mode; a servo motor is arranged corresponding to the injection pump, a follow-up screw rod is arranged at the output end of the servo motor, and a piston of the injection pump is in threaded transmission connection with the follow-up screw rod;
the sample tray is provided with a gravity sensor and is arranged corresponding to the liquid outlet end of the liquid outlet pipeline, and a plurality of sample vessels are loaded on the sample tray;
the controller comprises a main control board, and the servo motor and the gravity sensor are electrically connected with the main control board.
Preferably, the first control valve and/or the second control valve are/is a one-way valve, and the first control valve is in one-way communication along the liquid inlet direction of the liquid, and the second control valve is in one-way communication along the liquid outlet direction of the liquid.
Preferably, a liquid inlet end of the liquid inlet pipeline is communicated with a multi-channel electromagnetic valve, and bypass valve ports of the multi-channel electromagnetic valve are respectively communicated with different sample bottles;
the multi-channel electromagnetic valve is electrically connected with the main control board.
Preferably, an infusion guide pipe is arranged on the liquid outlet pipeline, and the sample vessel is arranged corresponding to the infusion guide pipe;
an auxiliary rotating device is arranged corresponding to the infusion catheter and is electrically connected with the main control board.
Preferably, the transfusion device is further provided with a waste liquid bottle, the bottom end of the waste liquid bottle is communicated with a waste liquid discharge pipe, and the waste liquid bottle is arranged in one swing operation range of the transfusion catheter.
Preferably, a liquid storage cavity is formed at one end of the piston and one end of the injection pump, a connecting rod is arranged on one side of the piston, which is back to the liquid storage cavity, and the connecting rod is in threaded transmission connection with the follow-up screw rod.
Preferably, the connecting rod and the follower screw are arranged in parallel with each other.
Preferably, the controller further comprises a touch screen, and the touch screen comprises a plurality of function key areas and a parameter display area;
the touch screen is electrically connected with the main control panel.
Preferably, the device further comprises a device body and a shell arranged on the device body;
the injection pump, the sample tray and the controller are all arranged in the device body, an operation display area is formed at the liquid outlet end of the liquid outlet pipeline and the sample vessel, and the shell covers the operation display area.
Compared with the prior art, the beneficial effects of the utility model are that:
be provided with the syringe pump in this scheme to the feed liquor end and play liquid end at the syringe pump are provided with first control valve and second control valve respectively, make when carrying out the drawing liquid operation, the play liquid chamber that forms in the syringe pump can form airtight space, change with the pressure differential that effectively avoids appearing when extraction corrosivity and volatile liquid in the traditional art, and the inaccurate problem of liquid weighing that leads to, improved the data accuracy in moving the liquid operation, be applicable to the operation of moving the liquid of multiple examination liquid.
Moreover, the device has a relatively simple structure, can meet the quantitative transfer of various types of liquid without using extra consumables, is more environment-friendly, has low input cost, and can effectively reduce the operation cost of an experiment.
In addition, the injection pump is skillfully provided with the servo motor, and the piston of the injection pump is in threaded transmission connection with the servo motor, so that the liquid transfer amount can be controlled more accurately, and the precision influence caused by fatigue of an elastic part in the prior art can be effectively avoided; and this device can realize flowing back operation many times after once drawing liquid, when carrying out the sample pretreatment of large batch, can effectively reduce operating time, has improved test efficiency widely.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.
Fig. 1 is a schematic diagram of the system connection structure of the present invention.
Fig. 2 is a schematic view of the structure of the utility model in use.
Wherein:
1-injection pump, 11-piston, 111-connecting rod, 12-liquid inlet pipeline, 121-first control valve, 13-liquid outlet pipeline, 131-second control valve, 132-infusion catheter, 133-auxiliary rotating device, 2-sample tray, 21-gravity sensor, 22-sample vessel, 3-multichannel electromagnetic valve, 4-controller, 41-touch screen, 5-servo motor, 51-follow screw, 6-sample bottle, 7-waste liquid bottle, 71-waste liquid discharge tube, 8-device body and 81-shell.
Detailed Description
In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and detailed description. In addition, the embodiments and features of the embodiments of the present application may be combined with each other without conflict. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, and the described embodiments are merely some embodiments, rather than all embodiments, of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
As shown in fig. 1 and 2, the present embodiment provides an automatic pipetting device based on weighing, which mainly comprises a syringe pump 1, a sample tray 2, a multi-channel solenoid valve 3 and a controller 4.
The syringe pump 1 includes a pump body in which a piston 11 is slidably disposed. One end of the injection pump 1 is communicated with a liquid inlet pipeline 12 and a liquid outlet pipeline 13, so that a liquid storage cavity is formed among the piston 11, the liquid inlet pipeline 12 and the liquid outlet pipeline 13; further, the liquid inlet pipe 12 with the intercommunication is provided with first control valve 121 between the syringe pump 1, the syringe pump 1 with the intercommunication is provided with second control valve 131 between the liquid outlet pipe 13, sets up first control valve 121 and second control valve 131 make the stock solution chamber is a relative inclosed cavity, with effectively reducing the atmospheric pressure change space in the stock solution chamber, ensure the accuracy of moving the liquid.
As a preferable scheme, in order to simplify the overall control, the first control valve 121 and the second control valve 131 are both configured as a check valve, such as a gravity check valve; and the first control valve 121 is in one-way conduction along the liquid inlet direction of the liquid, and the second control valve 131 is in one-way conduction along the liquid outlet direction of the liquid. In practical applications, the first control valve 121 and/or the second control valve 131 may also be provided as an electric control valve, and the electric control valve needs to be electrically connected to the controller 4.
In addition, a servo motor 5 is provided corresponding to the injection pump 1, the servo motor 5 in this embodiment is a high-precision stepping motor, the minimum liquid-drawing precision of the injection pump 1 is 1.04 μ L, and the maximum single liquid-moving quantity is 10 mL. The output end of the servo motor 5 is provided with a follow-up screw 51; one side of the piston 11, which faces away from the liquid storage cavity, is provided with a connecting rod 111, the connecting rod 111 is in threaded transmission connection with the follow-up screw 51, and the connection is in threaded transmission connection, so that the controllability of the sliding stroke of the piston 11 is more accurate. Preferably, the connecting rod 111 and the follower screw 51 are parallel to each other, so that the driven stroke of the piston 11 can be calculated more conveniently. In practical applications, a worm gear transmission mode may be set between the connecting rod 111 and the follower screw 51, and details are not described herein on the basis of the same functional principle.
Further, the sample tray 2 is provided with a gravity sensor 21, and the sample tray 2 is arranged corresponding to the liquid outlet end of the liquid outlet pipeline 13, so that a plurality of sample vessels 22 loaded on the sample tray 2 can correspond to the liquid outlet end of the liquid outlet pipeline 13 to contain and receive liquid and simultaneously carry out weighing operation; in this embodiment, an infusion tube 132 is disposed on the liquid outlet pipe 13, and the sample dish 22 is disposed at a liquid outlet end corresponding to the infusion tube 132; an auxiliary rotating device 133, such as a steering engine, is provided corresponding to the infusion catheter 132 to facilitate the operation of pipetting.
The multi-channel electromagnetic valve 3 is communicated with the liquid inlet end of the liquid inlet pipeline 12, and bypass valve ports of the multi-channel electromagnetic valve 3 are respectively communicated with different sample bottles 6 so as to realize liquid pumping and discharging operations on different sample liquids.
The controller 4 comprises a main control board and a touch screen 41, the servo motor 5, the gravity sensor 21, the multi-channel electromagnetic valve 3, the auxiliary rotating device 133 and the touch screen 41 are electrically connected with the main control board, so that the whole operation control is realized through the main control board, and the automation of the operation of the device is improved. The touch screen 41 further includes a plurality of function key areas and a parameter display area, where the function key areas include function keys such as a target weighing mass, a current actual weighing mass, a sample removing frequency, a peeling function, an automatic cleaning function, an automatic draining function, a reagent selecting function, and a density selecting function, so as to facilitate operation and monitoring of an operator.
Preferably, a waste liquid bottle 7 is further provided in the present embodiment, a waste liquid discharge pipe 71 is connected to a bottom end of the waste liquid bottle 7, and the waste liquid bottle 7 is disposed in one of the swing operation ranges of the liquid conveying pipe 132. Through the control of the auxiliary rotating device 133, the infusion tube 132 can be swung to different positions for different requirements, so as to realize the discharge of the sample liquid and the discharge of the waste liquid, and the self-cleaning operation in the pipeline of the device is convenient.
In this embodiment, an apparatus body 8 and a housing 81 provided on the apparatus body 8 are further provided; the multi-channel electromagnetic valve 3, the injection pump 1, the first control valve 121, the second control valve 131, the sample tray 2, the gravity sensor 21 and the controller 4 are all arranged in the device body 8; the multi-channel solenoid valve 3 is connected to the sample bottle 6 through a tube, the top of the sample tray 2, the sample vessel 22, the outlet end of the outlet tube 13 (i.e. the infusion tube 132) and the waste liquid bottle 7 are all disposed on the operation table of the device body 8 to form an operation display area, and the housing 81 is covered on the operation display area.
In order to facilitate further understanding of the present solution, the present embodiment further provides a method for using a weighing-based automatic liquid-transferring device, which is suitable for the above-mentioned weighing-based automatic liquid-transferring device, and includes the following steps:
automatic resetting: after the power of the device is started, the auxiliary rotating device 133 controls the infusion catheter 132 to horizontally rotate for a certain angle, so that the liquid outlet of the infusion catheter 132 rotates to a position right above the waste liquid bottle 7, and then the injection pump 1 starts to automatically reset to discharge air or residual liquid in the pump. After the waste liquid enters the waste liquid bottle 7, the waste liquid is discharged to a waste liquid collecting barrel outside the device through a waste liquid discharge pipe 71 at the bottom of the waste liquid bottle 7.
Inputting parameters: the empty sample vessel 22 is placed on the sample tray 2, and the target liquid quality, sample quantity, density, and liquid channel are input according to the experimental requirements. Wherein, if the density of the liquid is unknown, the default density value can be set as: 1 g/mL.
Starting cleaning: when the automatic cleaning function is selected, the multi-channel solenoid valve 3 connects the common channel with the target sub-channel, and the syringe pump 1 starts to pump the target solution, and then discharges the target solution to the waste liquid bottle 7 through the infusion tube 132 to the outside of the apparatus. Preferably, the volume of waste liquid discharged is three times the volume of the pipeline, and the user can set the cleaning volume by himself.
And (3) starting operation: after peeling, the auxiliary rotating device 133 controls the infusion guide tube 132 to be reset to the position right above the sample dish 22, the injection pump 1 automatically pumps the target liquid according to the sample quality and the sample quantity set by the user, after the liquid suction is finished, the injection pump 1 starts to discharge liquid, and the liquid falls onto the sample dish 22 through the infusion guide tube 132; when the first sample is weighed, the gravity sensor 21 measures the mass of the sample in real time, the main control board records the total rotating steps of the servo motor 5 when the target mass is reached, and the liquid is quickly discharged according to the same steps in the liquid discharging process of the subsequent samples. As a preferable mode, when the discharged liquid volume is smaller than the maximum volume of the syringe pump 1, the syringe pump 1 can perform a plurality of discharging operations after completing one suction. The servo motor 5 operates at a first speed in the liquid pumping process and operates at a second speed in the liquid discharging process, and the second speed is greater than the first speed so as to further reduce the test time consumption.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.
Claims (9)
1. An automatic pipetting device based on weighing, comprising:
the injection pump is provided with a liquid inlet pipeline and a liquid outlet pipeline in a communication mode at one end, a first control valve is arranged between the liquid inlet pipeline and the injection pump in a communication mode, and a second control valve is arranged between the injection pump and the liquid outlet pipeline in a communication mode; a servo motor is arranged corresponding to the injection pump, a follow-up screw rod is arranged at the output end of the servo motor, and a piston of the injection pump is in threaded transmission connection with the follow-up screw rod;
the sample tray is provided with a gravity sensor and is arranged corresponding to the liquid outlet end of the liquid outlet pipeline, and a plurality of sample vessels are loaded on the sample tray;
the controller comprises a main control board, and the servo motor and the gravity sensor are electrically connected with the main control board.
2. A weighing-based automatic pipetting device according to claim 1, wherein the first control valve and/or the second control valve are one-way valves, and the first control valve is in one-way communication along the liquid inlet direction of the liquid, and the second control valve is in one-way communication along the liquid outlet direction of the liquid.
3. The automatic pipetting device based on weighing as recited in claim 1 or 2, characterized in that the inlet end of the inlet pipeline is communicated with a multi-channel solenoid valve, and the bypass valve ports of the multi-channel solenoid valve are respectively communicated with different sample bottles;
the multi-channel electromagnetic valve is electrically connected with the main control board.
4. An automatic pipetting device based on weighing as recited in claim 3, characterized in that the liquid outlet pipe is provided with a transfusion conduit, and the sample vessel is arranged corresponding to the transfusion conduit;
an auxiliary rotating device is arranged corresponding to the infusion catheter and is electrically connected with the main control board.
5. The automatic pipetting device based on weighing as recited in claim 4, characterized in that a waste liquid bottle is further provided, a waste liquid discharge pipe is connected to the bottom end of the waste liquid bottle, and the waste liquid bottle is arranged in one of the swing operation ranges of the infusion catheter.
6. The automatic pipetting device based on weighing of claim 1 or 5, characterized in that a liquid storage cavity is formed at one end of the piston and the injection pump, a connecting rod is arranged at one side of the piston opposite to the liquid storage cavity, and the connecting rod is in threaded transmission connection with the follow-up screw.
7. An automatic pipetting device based on weighing according to claim 6, characterised in that the connecting rod and the follower screw are arranged parallel to each other.
8. A weight-based automatic pipetting device as recited in claim 1 or 7 wherein the controller further comprises a touch screen comprising a plurality of function button zones and a parameter display zone;
the touch screen is electrically connected with the main control panel.
9. A weight-based automatic pipetting device according to claim 8, further comprising a device body, a housing provided on the device body;
the injection pump, the sample tray and the controller are all arranged in the device body, an operation display area is formed at the liquid outlet end of the liquid outlet pipeline and the sample vessel, and the shell covers the operation display area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892791.9U CN215029034U (en) | 2021-04-27 | 2021-04-27 | Automatic liquid transfer device based on weighing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120892791.9U CN215029034U (en) | 2021-04-27 | 2021-04-27 | Automatic liquid transfer device based on weighing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215029034U true CN215029034U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120892791.9U Withdrawn - After Issue CN215029034U (en) | 2021-04-27 | 2021-04-27 | Automatic liquid transfer device based on weighing |
Country Status (1)
| Country | Link |
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| CN (1) | CN215029034U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145196A (en) * | 2021-04-27 | 2021-07-23 | 广州伊创科技股份有限公司 | Automatic liquid transfer device based on weighing and use method thereof |
-
2021
- 2021-04-27 CN CN202120892791.9U patent/CN215029034U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113145196A (en) * | 2021-04-27 | 2021-07-23 | 广州伊创科技股份有限公司 | Automatic liquid transfer device based on weighing and use method thereof |
| CN113145196B (en) * | 2021-04-27 | 2024-07-16 | 广州伊创科技股份有限公司 | Automatic pipetting device based on weighing and application method thereof |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20211207 Effective date of abandoning: 20240716 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20211207 Effective date of abandoning: 20240716 |