CN211755110U - Multichannel liquid-transfering device - Google Patents
Multichannel liquid-transfering device Download PDFInfo
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- CN211755110U CN211755110U CN202020077447.XU CN202020077447U CN211755110U CN 211755110 U CN211755110 U CN 211755110U CN 202020077447 U CN202020077447 U CN 202020077447U CN 211755110 U CN211755110 U CN 211755110U
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Abstract
The utility model relates to the technical field of medical treatment, and discloses a multichannel pipetting device, which comprises a piston rod fixing piece, a driving mechanism for driving the piston rod fixing piece to move longitudinally, a pump body, a plurality of longitudinally extending piston rods and pump nozzles with the same number as the piston rods; the pump body is provided with a plurality of pipetting channels extending longitudinally, and the number of the pipetting channels is consistent with that of the piston rods and corresponds to that of the piston rods one by one; the upper part of the pipetting channel is provided with a horizontally arranged annular sealing element, the annular sealing element is hollow and provided with a first through hole for the insertion of the piston rod, the piston rod is movably inserted into the first through hole and extends into the pipetting channel, and the lower part of the pipetting channel is communicated with the pump nozzle; the piston rod is fixedly connected with the piston rod fixing piece; adopt the utility model provides a move liquid device, the multichannel moves the liquid simultaneously, and very big degree has improved the efficiency of moving the liquid.
Description
Technical Field
The utility model belongs to the technical field of the medical treatment technique and specifically relates to a multichannel liquid-transfering device is related to.
Background
With the development of science and technology, the medical technology level is also remarkably improved. In medical experiments, it is necessary to mix one solution with another or to transfer one solution to a specific location, during which pipetting using a pipetting device is required.
In the prior art, people adopt single channel pipetting devices to pipette. The single-channel pipetting device mainly adopts the working flow that a power element pushes a single piston rod to move so as to enable a single pump nozzle to suck or discharge solution; the structure has extremely low liquid transfer efficiency and long consumed time, and easily causes the missing of better experiment time; therefore, it is urgent to develop a pipetting device with high pipetting efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multichannel moves liquid device aims at solving among the prior art and moves the problem of liquid inefficiency among the prior art.
The utility model is realized in such a way, a multi-channel liquid-transfering device comprises a piston rod fixing piece, a driving mechanism for driving the piston rod fixing piece to move longitudinally, a pump body, a plurality of longitudinally extending piston rods and pump nozzles with the same number as the piston rods; the pump body is provided with a plurality of pipetting channels extending longitudinally, and the number of the pipetting channels is consistent with that of the piston rods and corresponds to that of the piston rods one by one; the upper part of the pipetting channel is provided with a horizontally arranged annular sealing element, the annular sealing element is hollow and provided with a first through hole for the insertion of the piston rod, the piston rod is movably inserted into the first through hole and extends into the pipetting channel, and the lower part of the pipetting channel is communicated with the pump nozzle; the piston rod is fixedly connected with the piston rod fixing piece.
Further, the liquid transfer channel comprises a liquid storage channel positioned on the upper portion of the liquid transfer channel and an installation channel positioned on the lower portion of the liquid transfer channel, the installation channel is used for installing the pump nozzle, the pump nozzle is communicated with the installation channel, a partition wall is arranged between the liquid storage channel and the installation channel, the partition wall is provided with a second through hole, and the second through hole is communicated with the liquid storage channel and the installation channel.
Further, the piston rod fixing piece comprises an upper fixing piece and a lower fixing piece fixedly connected with the upper fixing piece; the upper fixing piece is provided with a groove for accommodating the head of the piston rod, the lower fixing piece is provided with third through holes which are consistent in number and in one-to-one correspondence with the piston rods, and the piston rods penetrate through the third through holes and the heads of the piston rods are fixed in the groove.
Further, an elastic element is arranged between the upper fixing piece and the piston rod and used for preventing the piston rod from loosening.
Further, the annular seal is provided as an oil seal.
Further, a cover plate is fixed at the upper end of the pump body, the upper end of the liquid storage channel is outwards recessed to form a groove, the groove is used for accommodating the annular sealing element, and a protruding block abutted to the annular sealing element is arranged at the lower end of the cover plate.
Further, the driving mechanism comprises a power element, a first gear, a second gear and a longitudinally extending screw rod; the output shaft of the power element is connected with the first gear, the first gear is meshed with the second gear, a threaded hole is formed in the second gear in a hollow mode, the screw rod penetrates through the threaded hole and is in threaded connection with the second gear, and the lower portion of the screw rod is connected with the piston rod fixing piece.
Furthermore, multichannel liquid-transfering device still includes the slide rail of longitudinal extension, power component fixes on the slide rail, be equipped with the slider on the slide rail, the slider can slide on the slide rail, the slider with piston rod mounting fixed connection.
Furthermore, the multichannel pipetting device is also provided with a positioning device; the positioning device comprises a photoelectric switch and a blocking piece extending longitudinally, the photoelectric switch is fixed on the pump body, the blocking piece is fixedly connected with the piston rod fixing piece, and when the piston rod fixing piece is located at an initial position, the photoelectric switch and the blocking piece are arranged just opposite to each other.
Further, the inner wall of the liquid storage channel is provided with a fourth through hole used for being connected with an air pressure detection device, and the fourth through hole is communicated with the liquid storage channel and the outer wall of the pump body.
Compared with the prior art, the utility model provides a pair of multichannel pipetting device, during imbibition, the pump mouth is put into and is waited to move solution, pump mouth department is sealed by solution this moment, it is sealed through annular seal spare to move liquid passageway upper portion, form airtight space in the pipetting passageway, actuating mechanism drives piston rod mounting and vertically moves up, piston rod mounting drives the piston rod of rather than fixed connection and vertically moves up, volume increase in the pipetting passageway, the air total volume does not change, therefore pressure in the pipetting passageway reduces, form the pressure difference with the external world in the pipetting passageway, solution moves to the pipetting passageway under the effect of pressure, multichannel pipetting device accomplishes the imbibition process; when liquid is discharged, the pump nozzle is placed in a designated place, the driving mechanism drives the piston rod fixing piece to move longitudinally and downwards, the piston rod fixing piece drives the piston rod fixedly connected with the piston rod fixing piece to move longitudinally and downwards, the volume in the liquid transferring channel is reduced, the total amount of air is unchanged, therefore, the pressure in the liquid transferring channel is increased, the pressure difference is formed between the interior of the liquid transferring channel and the outside, the solution moves outwards from the pump nozzle under the action of the pressure, and the multi-channel liquid transferring device finishes the liquid discharging process; adopt a multichannel pipetting device that this embodiment provided, have a plurality of liquid-transfering channels in the pump body, pump body lower extreme is connected with a plurality of pump mouths, and actuating mechanism drives the piston rod work in the liquid-transfering channel simultaneously, and the multichannel absorbs or discharge solution simultaneously, has reduced the time of transfering liquid, and very big degree has improved the efficiency of transfering liquid.
Drawings
Fig. 1 is a cross-sectional view of a multi-channel pipetting device provided by an embodiment of the present invention;
fig. 2 is a structural diagram of a multi-channel pipetting device provided by an embodiment of the invention;
fig. 3 is a structural diagram of a driving mechanism according to an embodiment of the present invention.
Reference numerals: 1-driving mechanism, 2-positioning device, 11-power element, 12-sliding rail, 13-screw rod, 14-sliding block, 21-blocking piece, 22-photoelectric switch, 31-piston rod fixing piece, 311-upper fixing piece, 312-lower fixing piece, 32-piston rod, 33-cover plate, 34-annular sealing piece, 35-fourth through hole, 36-pipetting channel, 361-liquid storage channel, 362-second through hole, 363-installation channel and 37-pump nozzle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", 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 it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Referring to fig. 1, a preferred embodiment of the present invention is provided.
A multi-channel pipetting device comprises a piston rod fixing piece 31, a driving mechanism 1 for driving the piston rod fixing piece 31 to move longitudinally, a pump body, a plurality of longitudinally extending piston rods 32 and pump nozzles 37 with the same number as the piston rods 32; the pump body is provided with a plurality of pipetting channels 36 extending longitudinally, and the number of the pipetting channels 36 is consistent with that of the piston rods 32 and corresponds to one; a horizontally arranged annular sealing member 34 is arranged at the upper part of the pipetting channel 36, a first through hole for inserting the piston rod 32 is formed in the hollow part of the annular sealing member 34, the piston rod 32 is movably inserted into the first through hole and extends into the pipetting channel 36, and the lower part of the pipetting channel 36 is communicated with a pump nozzle 37; the piston rod 32 is fixedly connected to the piston rod holder 31.
The working process of the multichannel pipetting device for carrying the solution comprises the following steps: first, the pump nozzle 37 is put into the solution to be carried, the multichannel pipetting device sucks the solution, then the device is taken out, the pump nozzle 37 is put into a designated place, and the multichannel pipetting device discharges the solution.
Specifically, during pipetting, the pump nozzle 37 is placed into a solution to be transported, at this time, the pump nozzle 37 is sealed by the solution, the upper part of the pipetting channel 36 is sealed by the annular sealing member 34, a closed space is formed in the pipetting channel 36, the driving mechanism 1 drives the piston rod fixing member 31 to move longitudinally upwards, the piston rod fixing member 31 drives the piston rod 32 fixedly connected with the piston rod fixing member to move longitudinally upwards, the volume in the pipetting channel 36 is increased, the total amount of air is not changed, therefore, the pressure in the pipetting channel 36 is reduced, a pressure difference is formed between the interior of the pipetting channel 36 and the outside, the solution moves into the pipetting channel 36 under the action of the pressure difference, and the multi-channel pipetting device; during liquid discharge, the pump nozzle 37 is placed in a designated place, the driving mechanism 1 drives the piston rod fixing member 31 to move longitudinally downwards, the piston rod fixing member 31 drives the piston rod 32 fixedly connected with the piston rod fixing member to move longitudinally downwards, the volume in the liquid transfer channel 36 is reduced, the total amount of air is unchanged, therefore, the pressure in the liquid transfer channel 36 is increased, a pressure difference is formed between the interior of the liquid transfer channel 36 and the outside, the solution moves outwards from the pump nozzle 37 under the action of the pressure difference, and the multi-channel liquid transfer device completes the liquid discharge process.
Adopt a multichannel pipetting device that this embodiment provided, have a plurality of liquid-transfering channels 36 in the pump body, pump body lower extreme is connected with a plurality of pump mouths 37, and actuating mechanism 1 drives piston rod 32 work in the liquid-transfering channel 36 simultaneously, and the multichannel is drawn simultaneously or discharge solution, has reduced the time of transfering the liquid, and very big degree has improved the efficiency of transfering the liquid.
In the present embodiment, the pipetting channel 36 comprises a liquid storage channel 361 located at the upper part of the pipetting channel 36, and a mounting channel 363 located at the lower part of the pipetting channel 36, wherein the mounting channel 363 is used for mounting the pump nozzle 37, the pump nozzle 37 is communicated with the mounting channel 363, a separation wall is arranged between the liquid storage channel 361 and the mounting channel 363, the separation wall is provided with a second through hole 362, and the second through hole 362 is communicated with the liquid storage channel 361 and the mounting channel 363; it should be noted that the aperture of the second through hole 362 should not be too large, so as to increase the bottom surface area of the liquid storage channel 361, enhance the bearing capacity of the liquid storage channel 361 on the solution, and reduce the interference of the solution gravity on the pipetting.
As shown in fig. 2, the piston rod fixing member 31 includes an upper fixing member 311 and a lower fixing member 312 fixedly connected to the upper fixing member 311; the upper fixing piece 311 is provided with a groove for accommodating the head of the piston rod 32, the lower fixing piece 312 is provided with third through holes which are consistent in number with the piston rods 32 and are in one-to-one correspondence with the piston rods, the piston rods 32 penetrate through the third through holes, and the heads of the piston rods are fixed in the groove; in this embodiment, the piston rod 32 has a flattened head with a width greater than the diameter of the shaft of the piston rod 32; by adopting the structure, the disassembly and assembly are convenient.
Specifically, an elastic member for preventing the piston rod 32 from loosening is provided between the upper fixing member 311 and the piston rod 32; during assembly, the elastic element is firstly installed, then the head of the piston rod 32 is placed in the groove, the head of the piston rod 32 is abutted to the elastic element, and finally the upper fixing piece 311 and the lower fixing piece 312 are connected through the bolt, meanwhile, the piston rod 32 always compresses the elastic element, and the elastic element provides certain counterforce to the head of the piston rod 32, so that the piston rod 32 is stably fixed in the piston rod fixing piece 31.
Preferably, the annular seal 34 is provided as an oil seal; in this embodiment, the oil seal has stronger sealing effect than other sealing rings.
Moreover, a cover plate 33 is fixed at the upper end of the pump body, the upper end of the liquid storage channel 361 is recessed outwards to form a groove, the groove is used for accommodating an annular sealing element, and a bump which is abutted against the annular sealing element is arranged at the lower end of the cover plate 33; with the above-described structure, the assembly and replacement of the annular seal member 34 are facilitated.
In the present embodiment, the drive mechanism 1 includes a power element 11, a first gear, a second gear, and a longitudinally extending lead screw 13; an output shaft of the power element 11 is connected with a first gear, the first gear is meshed with a second gear, a threaded hole is formed in the second gear in a hollow mode, a screw rod 13 penetrates through the threaded hole and is in threaded connection with the second gear, and the lower portion of the screw rod 13 is connected with a piston rod fixing piece 31; the power element 11 drives the first gear to rotate, the first gear drives the second gear engaged with the first gear to rotate, the second gear enables the screw rod 13 in threaded connection with the second gear to do linear motion in the longitudinal direction, and the screw rod 13 drives the piston rod fixing piece 31 to do linear motion in the longitudinal direction.
It should be noted that the driving mechanism 1 may also adopt a hydraulic motor, an output rod of the hydraulic motor is connected to the piston rod fixing member 31, and the output rod directly drives the piston rod fixing member 31 to perform a reciprocating linear motion.
For a better movement mode, the multi-channel pipetting device further comprises a sliding rail 12 extending longitudinally, the power element 11 is fixed on the sliding rail 12, a sliding block 14 is arranged on the sliding rail 12, the sliding block 14 can slide on the sliding rail 12, and the sliding block 14 is fixedly connected with the piston rod fixing part 31; the slide rail 12 and the slide block 14 are adopted, so that the bearing capacity of the driving mechanism 1 can be enhanced, and the guiding function is achieved.
Furthermore, the multi-channel liquid-transfering device is also provided with a positioning device 2; the positioning device 2 comprises a photoelectric switch 22 and a baffle 21 extending longitudinally, the photoelectric switch 22 is fixed on the pump body, the baffle 21 is fixedly connected with the piston rod fixing piece 31, and when the piston rod fixing piece 31 is located at an initial position, the photoelectric switch 22 is arranged opposite to the baffle 21; due to machining errors, assembly errors and transmission errors, the piston rod fixing piece 31 is difficult to accurately return to the initial position after moving; when the blocking piece 21 on the piston rod fixing member 31 moves to block the photoelectric sensor from receiving the light signal, the photoelectric sensor sends a signal to the power element 11, the power element 11 stops rotating, and the piston rod fixing member 31 returns to the initial position.
Furthermore, the inner wall of the liquid storage channel 361 is provided with a fourth through hole 35 for connecting an air pressure detection device, and the fourth through hole 35 is communicated with the second liquid storage channel 361 and the outer wall of the pump body; the fourth through hole 35 is externally connected with an air pressure detection device for detecting the air pressure in the liquid storage channel 361 in real time, and calculating the volume of the solution in the liquid transfer device according to the air pressure.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A multi-channel pipetting device is characterized by comprising a piston rod fixing piece, a driving mechanism for driving the piston rod fixing piece to move longitudinally, a pump body, a plurality of longitudinally extending piston rods and pump nozzles with the same number as the piston rods; the pump body is provided with a plurality of pipetting channels extending longitudinally, and the number of the pipetting channels is consistent with that of the piston rods and corresponds to that of the piston rods one by one; the upper part of the pipetting channel is provided with a horizontally arranged annular sealing element, the annular sealing element is hollow and provided with a first through hole for the insertion of the piston rod, the piston rod is movably inserted into the first through hole and extends into the pipetting channel, and the lower part of the pipetting channel is communicated with the pump nozzle; the piston rod is fixedly connected with the piston rod fixing piece.
2. The multi-channel pipetting device as recited in claim 1, wherein the pipetting channel comprises a liquid storage channel located at the upper part of the pipetting channel, and a mounting channel located at the lower part of the pipetting channel, the mounting channel is used for mounting the pump nozzle, the pump nozzle is communicated with the mounting channel, a partition wall is arranged between the liquid storage channel and the mounting channel, the partition wall is provided with a second through hole, and the second through hole is communicated with the liquid storage channel and the mounting channel.
3. A multi-channel pipetting device as recited in claim 1 wherein the piston rod holder comprises an upper holder and a lower holder fixedly connected to the upper holder; the upper fixing piece is provided with a groove for accommodating the head of the piston rod, the lower fixing piece is provided with third through holes which are consistent in number and in one-to-one correspondence with the piston rods, and the piston rods penetrate through the third through holes and the heads of the piston rods are fixed in the groove.
4. A multi-channel pipetting device as recited in claim 3 wherein an elastic member is provided between the upper fixing member and the piston rod, the elastic member preventing the piston rod from loosening.
5. A multi-channel pipetting device as recited in claim 1 wherein the annular seal is provided as an oil seal.
6. A multi-channel pipetting device as recited in claim 2 wherein the pump body has a cover plate secured to an upper end thereof, the upper end of the reservoir channel being recessed outwardly to form a recess for receiving the annular seal, the cover plate having a projection at a lower end thereof for abutting the annular seal.
7. A multi-channel pipetting device as recited in claim 1 wherein the drive mechanism comprises a power element, a first gear, a second gear and a longitudinally extending lead screw; the output shaft of the power element is connected with the first gear, the first gear is meshed with the second gear, a threaded hole is formed in the second gear in a hollow mode, the screw rod penetrates through the threaded hole and is in threaded connection with the second gear, and the lower portion of the screw rod is connected with the piston rod fixing piece.
8. A multi-channel pipetting device as recited in claim 7 further comprising a longitudinally extending slide rail on which the power element is fixed, the slide rail having a slide block thereon, the slide block being slidable on the slide rail, the slide block being fixedly connected to the piston rod fixture.
9. A multi-channel pipetting device as recited in claim 1 wherein the multi-channel pipetting device is further provided with a positioning device; the positioning device comprises a photoelectric switch and a blocking piece extending longitudinally, the photoelectric switch is fixed on the pump body, the blocking piece is fixedly connected with the piston rod fixing piece, and when the piston rod fixing piece is located at an initial position, the photoelectric switch and the blocking piece are arranged just opposite to each other.
10. A multi-channel pipetting device as recited in claim 2 wherein the inner wall of the liquid storage channel has a fourth through hole for connecting the air pressure detecting device, and the fourth through hole communicates the liquid storage channel with the outer wall of the pump body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020077447.XU CN211755110U (en) | 2020-01-14 | 2020-01-14 | Multichannel liquid-transfering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020077447.XU CN211755110U (en) | 2020-01-14 | 2020-01-14 | Multichannel liquid-transfering device |
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| Publication Number | Publication Date |
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| CN211755110U true CN211755110U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020077447.XU Active CN211755110U (en) | 2020-01-14 | 2020-01-14 | Multichannel liquid-transfering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733590A (en) * | 2022-05-16 | 2022-07-12 | 苏州贝康医疗器械有限公司 | Liquid transfer device and liquid transfer workstation |
-
2020
- 2020-01-14 CN CN202020077447.XU patent/CN211755110U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733590A (en) * | 2022-05-16 | 2022-07-12 | 苏州贝康医疗器械有限公司 | Liquid transfer device and liquid transfer workstation |
| CN114733590B (en) * | 2022-05-16 | 2023-10-03 | 苏州贝康医疗器械有限公司 | Pipetting device and pipetting workstation |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230105 Address after: 518000 workshop 201, No. 8, Hongxin Industrial Park, No. 1303, sightseeing Road, Xinlan community, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Ruijing Intelligent Life Technology Co.,Ltd. Address before: 518000 6th floor, building 8, No.9 Qilin Road, third industrial zone, Nankeng community, Bantian street, Longgang District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN MDERN BIOTECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |