Pipetting treatment device

Abstract

The utility model relates to a pipetting treatment device which comprises a pipetting workbench and a pipetting mechanism arranged above the pipetting workbench, the pipetting workbench comprises a machine table, and a sample rack, a heating oscillator, a waste pipe box, a pipette positioning structure, a reagent placing table and an elisa plate placing rack which are arranged on the surface of the machine table, and a plurality of grooves for placing reagent bottles are formed in the surface of one side of the reagent placing table; a main reagent fixing frame for placing a main reagent is arranged on the surface of the other side of the reagent placing table; the liquid suction mechanism comprises a Y-direction moving seat and an X-direction moving seat capable of moving forwards and backwards along the Y-direction moving seat, a plurality of injection pumps are arranged in front of the X-direction moving seat, liquid transfer gun heads are arranged at output ports of the injection pumps, and liquid suction pipes are inserted below the liquid transfer gun heads. The device is simple in structure, reasonable in design, convenient to use, time-saving and labor-saving, and beneficial to improving the working efficiency of pipetting treatment.

Description

Technical Field

[0001] The utility model relates to a liquid transfer processing device. Background Art

[0002] Liquid transfer processing is widely used in genomics research such as nucleic acid extraction, construction of various biological laboratory systems, large-scale sequencing, and drug screening, protein analysis, etc. For example, when processing and detecting centrifuged blood, generally, an operator holds a pipette or other liquid transfer tools manually and performs multiple liquid transfers according to the processing steps. Due to the large number of liquid transfers and the need for reaction time for the liquid, it is time-consuming and laborious, and the processing efficiency is low. Summary of the Utility Model

[0003] The utility model improves the above problems, that is, the technical problem to be solved by the utility model is a liquid transfer processing device, which is convenient and efficient to use.

[0004] The utility model is composed of a liquid transfer workbench and a liquid suction mechanism arranged above the liquid transfer workbench; the liquid transfer workbench includes a machine table and a sample rack, a heating shaker, a waste tube box, a liquid suction tube positioning structure, a reagent placement table, and an ELISA plate placement rack arranged on the surface of the machine table. A plurality of grooves for placing reagent bottles are arranged on one side surface of the reagent placement table, and a main reagent fixing rack for placing the main reagent is arranged on the other side surface of the reagent placement table; the liquid suction mechanism includes a Y-direction moving seat and an X-direction moving seat that can move forward and backward along the Y-direction moving seat. A plurality of injection pumps are arranged in front of the X-direction moving seat. A pipette tip is arranged at the output port of the injection pump. A liquid suction tube is inserted below the pipette tip. A Z-direction driving structure for driving the injection pump, the pipette tip, and the liquid suction tube to lift and lower synchronously is arranged on the X-direction moving seat. A Y-direction driving structure for driving the X-direction moving seat to move left and right is arranged behind the Y-direction moving seat.

[0005] Further, an X-direction slider is arranged above the X-direction moving seat. An X-direction guide rail matched with the first slider is arranged on the Y-direction moving seat. A cylinder for driving the X-direction moving seat to move forward and backward along the X-direction guide rail is arranged on the Y-direction moving seat.

[0006] Further, the Z-direction driving structure includes a Z-direction slide rail arranged in front of the X-direction moving seat. A Z-direction slider is arranged at the rear of the injection pump. The Z-direction slider is slidably matched with the Z-direction slide rail. A screw motor is arranged on the upper part of the X-direction moving seat. The output shaft of the screw motor is in threaded cooperation with the Z-direction slider to drive the Z-direction slider and the pipette tip to lift and lower.

[0007] Further, the Y-direction driving structure includes a Y-direction guide rail arranged on the frame. A Y-direction slider that can slide along the Y-direction guide rail is arranged at the rear of the Y-direction moving seat. A synchronous belt is arranged outside the Y-direction moving seat. The Y-direction moving seat is fixedly connected to a certain point at the lower part of the synchronous belt. Synchronous wheels are arranged at both ends of the synchronous belt, and one of the synchronous wheels is driven to rotate by a Y-direction motor.

[0008] Further, a blanking mechanism is arranged beside the syringe pump. The blanking mechanism includes a blanking cylinder fixing plate arranged outside the syringe pump. A cylinder is installed on the blanking cylinder fixing plate. A blanking pressing sleeve is sleeved outside the pipette tip. The output shaft of the cylinder is connected to the blanking pressing sleeve through a connecting piece. The width of the blanking pressing sleeve is greater than the width of the upper end of the liquid suction pipe.

[0009] Further, the sample rack includes a top plate and a bottom plate arranged at intervals. The front and rear parts of the top plate are both connected by vertical plates. The space between the top plate and the bottom plate is a hollow part. A through hole is opened on the top plate. A notch is opened on the surface of the bottom plate. Each notch corresponds to the through hole, and the corresponding notch and through hole are used to place test tube A.

[0010] Further, a waste pipe placement opening is opened on the surface of the waste pipe box.

[0011] Further, the liquid suction pipe positioning structure includes a positioning seat, a fixed block and a movable pressing block respectively arranged on both sides above the positioning seat. The movable pressing block is fixed on the positioning seat through a rotating shaft. A spring is arranged between the positioning seat and the movable pressing block. A clamping groove is arranged inside the fixed block. A fixed column is arranged behind the fixed block. A column cap is arranged above the fixed column. The upper part of the positioning seat is in an open shape, and a cavity is arranged in the middle of the positioning seat. An installation groove for installing the movable pressing block is arranged on one side of the positioning seat.

[0012] Further, a pipetting fixing plate is installed on the surface of the positioning seat. A plurality of through holes for placing the liquid suction pipe are opened on the pipetting fixing plate. U-shaped clamping grooves are arranged on both sides of the pipetting fixing plate. One of the U-shaped clamping grooves cooperates with the fixed block on one side of the positioning seat, and the other U-shaped clamping groove cooperates with the movable pressing block on the other side of the positioning seat. A semi-circular groove is also opened on one side of the pipetting fixing plate, and the semi-circular groove abuts against the fixed column of the positioning seat.

[0013] Further, the ELISA plate placement rack includes an upper plate and U-shaped side plates arranged on both sides of the upper plate. The upper plate and the two U-shaped side plates form a limiting space for placing the ELISA plate. A lower plate is arranged below the upper plate. The upper plate and the lower plate are connected by two support plates. Notches are arranged at the front and rear parts of the upper plate.

[0014] Compared with the prior art, the utility model has the following beneficial effects: The device has a simple structure, reasonable design, convenient and efficient use, improves the test detection efficiency. The liquid suction mechanism moves to the position of the liquid suction pipe positioning structure, and the liquid suction mechanism drives the pipette tip of its liquid transfer mechanism to insert downward into the liquid suction pipe on the liquid transfer fixing plate of the liquid suction pipe positioning structure. Then, the liquid suction mechanism drives the liquid suction pipe to move to the test tube A on the sample rack, and moves the sample liquid in the test tube A to the test tube B on two of the heating shakers; then the liquid suction mechanism moves to the position of the waste tube box and separates and disengages the used liquid suction pipe into the waste tube box through the blanking mechanism; the liquid suction mechanism moves to the position of the liquid transfer fixing plate to re-use a new liquid suction pipe, and then adds the reagent placed on the reagent placement table into the test tube B as required for heating and shaking and mixing; the liquid suction mechanism moves to the position of the waste tube box and separates and disengages the used liquid suction pipe into the waste tube box through the blanking mechanism, the liquid suction mechanism moves to the position of the liquid transfer fixing plate to re-use a new liquid suction pipe, and then transfers the liquid in the test tube B on two of the heating shakers to the test tube B on the other two heating shakers, adds the main reagent and heats and shakes and mixes; replaces the new liquid suction pipe, adds the required reagent to the test tube B on the other two heating shakers and heats and shakes and mixes; replaces the new liquid suction pipe, and then moves the processed liquid in the test tube B into the microplate; finally, takes out the microplate with the liquid and detects the liquid therein. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the utility model;

[0016] Figure 2 It is a front structural schematic diagram of the liquid suction structure of the embodiment of the utility model;

[0017] Figure 3 It is a side structural schematic diagram of the liquid suction structure of the embodiment of the utility model;

[0018] Figure 4 It is a top view of the liquid transfer workbench of the embodiment of the utility model;

[0019] Figure 5 It is a top view of the liquid suction pipe positioning structure of the embodiment of the utility model;

[0020] Figure 6 It is a cross-sectional view of the sample rack of the embodiment of the utility model;

[0021] Figure 7 It is a cross-sectional view of the microplate placement rack of the embodiment of the utility model;

[0022] Figure 8 It is a cross-sectional view of the main reagent fixing rack of the embodiment of the utility model;

[0023] Figure 9Cross-sectional view of the liquid suction tube positioning structure according to an embodiment of the present utility model;

[0024] Figure 10 Stereogram of the liquid suction tube positioning structure according to an embodiment of the present utility model;

[0025] Figure 11 Top view of the pipetting fixing plate according to an embodiment of the present utility model. Detailed implementation manners

[0026] The present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0027] Embodiment 1: As shown in the attached Figures 1 - 11 In this embodiment, a pipetting processing device is provided, which includes a pipetting workbench B and a liquid suction mechanism A arranged above the pipetting workbench.

[0028] During operation: The liquid suction mechanism moves to the position of the liquid suction tube positioning structure. The liquid suction mechanism drives the pipetting gun head of its pipetting mechanism to insert downward into the liquid suction tube on the pipetting fixing plate of the liquid suction tube positioning structure. Then, the liquid suction mechanism drives the liquid suction tube to move to the test tube A on the sample rack, and moves the sample liquid in the test tube A to the test tube B on two of the heating and shaking devices; then the liquid suction mechanism moves to the waste tube box position and separates and disengages the used liquid suction tube into the waste tube box through the blanking mechanism; the liquid suction mechanism moves to the position of the pipetting fixing plate to pick up a new liquid suction tube, and then adds the reagent placed on the reagent placement table into the test tube B as required for heating and shaking and mixing; the liquid suction mechanism moves to the waste tube box position and separates and disengages the used liquid suction tube into the waste tube box through the blanking mechanism. The liquid suction mechanism moves to the position of the pipetting fixing plate to pick up a new liquid suction tube, and then transfers the liquid in the test tube B on two of the heating and shaking devices to the test tube B on another two heating and shaking devices, adds the main reagent and heats and shakes and mixes; replaces the new liquid suction tube, adds the required reagent to the test tube B on another two heating and shaking devices and heats and shakes and mixes; replaces the new liquid suction tube, and then moves the processed liquid in the test tube B into the microplate. Finally, the microplate with the liquid is taken out and the liquid in it is detected.

[0029] Specifically, as shown in Figures 2 - 3 In the figure, the liquid suction mechanism includes a Y-direction moving seat A1 and an X-direction moving seat A2 that can move forward and backward along the Y-direction moving seat. A plurality of injection pumps A3 are arranged on the front surface of the X-direction moving seat. The output port of the injection pump is provided with a pipetting gun head A4. A liquid suction tube B414 is inserted below the pipetting gun head. A Z-direction driving structure A5 for driving the injection pump, the pipetting gun head, and the liquid suction tube to lift and lower synchronously is arranged on the X-direction moving seat. A Y-direction driving structure A6 for driving the X-direction moving seat to move left and right is arranged on the rear surface of the Y-direction moving seat;

[0030] After the insertion joint of the pipette tip is inserted into the liquid suction pipe, the two are in a sealed state.

[0031] In the embodiment of the present invention, an X-direction sliding block A7 is arranged above the X-direction moving seat, an X-direction guide rail A8 matched with the first sliding block is arranged on the Y-direction moving seat, and a cylinder A10 for driving the X-direction moving seat to move back and forth along the X-direction guide rail is arranged on the Y-direction moving seat.

[0032] In the embodiment of the present invention, the Z-direction driving structure A5 includes a Z-direction sliding rail A501 arranged in front of the X-direction moving seat, a Z-direction sliding block A502 is arranged at the rear of the injection pump, the Z-direction sliding block is slidably matched with the Z-direction sliding rail, a lead screw motor A503 is arranged on the upper part of the X-direction moving seat, and the output shaft of the lead screw motor is in threaded cooperation with the Z-direction sliding block to drive the Z-direction sliding block and the pipette tip to move up and down; specifically, a lead screw A504 is arranged on the output shaft of the lead screw motor, and the lead screw is in threaded cooperation with the Z-direction sliding block.

[0033] In the embodiment of the present invention, the Y-direction driving structure A6 includes a Y-direction guide rail A601 arranged on the frame, a Y-direction sliding block A602 capable of sliding along the Y-direction guide rail is arranged at the rear of the Y-direction moving seat, a synchronous belt A603 is arranged outside the Y-direction moving seat, the Y-direction moving seat is fixedly connected to a certain point at the lower part of the synchronous belt, synchronous wheels A604 are arranged at both ends of the synchronous belt, and one of the synchronous wheels is driven by a Y-direction motor A605 to rotate, so as to drive the Y-direction moving seat to move left and right as a whole along the Y-direction guide rail.

[0034] In the embodiment of the present invention, a blanking mechanism A9 is arranged beside the injection pump. The blanking mechanism includes a blanking cylinder fixing plate A901 arranged outside the injection pump, a cylinder A902 is installed on the blanking cylinder fixing plate, a blanking pressing sleeve A903 is sleeved outside the pipette tip, the output shaft of the cylinder is connected to the blanking pressing sleeve through a connecting piece A904, and the width of the blanking pressing sleeve is greater than the width of the upper end of the liquid suction pipe; the blanking pressing sleeve can be made of a material with a certain elasticity and a certain hardness.

[0035] When it is necessary to remove the liquid suction pipe, the cylinder is driven to drive the blanking pressing sleeve to move downward along the length direction of the pipette tip, so as to press out the upper part of the liquid suction pipe from the insertion joint A401 of the pipette tip, so that the waste liquid suction pipe is separated and falls downward.

[0036] In the embodiment of the present invention, an insertion joint A401 is arranged at the lower end of the pipette tip, and the insertion joint is matched with the upper end of the liquid suction pipe; the insertion joint and the pipette tip are integrally formed, and liquid passing ports are arranged in the middle of the insertion joint and the liquid transfer joint.

[0037] In the embodiments of the present utility model, the syringe pump is a prior art, and the syringe pump can adopt a vertical syringe pump with the model SY08 / 5ML.

[0038] In the embodiments of the present utility model, when the liquid suction mechanism works: the synchronous belt is driven by the Y-direction motor to move, so as to drive the Y-direction moving seat to move left and right, and adjust the left and right positions of the pipette tip and the liquid suction tube; the X-direction moving seat is driven by the cylinder to move back and forth, so as to synchronously adjust the front and back positions of the pipette tip and the liquid suction tube; the Z-direction slider, the syringe pump, the pipette tip and the liquid suction tube are driven by the lead screw motor and the lead screw to move up and down, so that the liquid suction tube extends into the corresponding test tube for liquid suction and drainage; the above-mentioned liquid suction and drainage work is driven by the syringe pump, so that the liquid is discharged or inhaled through the liquid suction tube.

[0039] Embodiment 2: On the basis of Embodiment 1, as Figures 4 - 8 shown, in this embodiment, the pipetting workbench includes a machine table B7 and a sample rack B1, four heating shakers B2, a waste tube box B3, two liquid suction tube positioning structures B4, a reagent placement table B5, and an ELISA plate placement rack B6 arranged on the surface of the machine table. A plurality of grooves B501 for placing reagent bottles B504 are arranged on one side surface of the reagent placement table, and a main reagent fixing rack B502 for placing the main reagent is arranged on the other side surface of the reagent placement table; the sample rack is used to place the test tube AB101 filled with the sample, and a placement opening B202 is arranged on the heating shaker, and this placement opening can be used to place the test tube BB201, the liquid suction tube positioning structure B4 is used to place the liquid suction tube B414, and the ELISA plate placement rack is used to place the ELISA plate B601.

[0040] The above-mentioned heating shaker is a prior art, which is used to heat and shake the test tube B placed on the test tube hole of the heating shaker, so as to realize the function of heating and shaking and mixing the sample and the added liquid medicine; the above-mentioned heating shaker can adopt a test tube heating shaker with the model TS100 manufactured by Hangzhou Ruicheng Instrument Co., Ltd.

[0041] The reagents placed in the grooves of the above-mentioned reagent placement table can be serum treatment solution, alkali reagent, buffer solution, diazotization reagent, etc.

[0042] In the embodiments of the present utility model, the sample rack B1 includes a top plate B102 and a bottom plate B103 arranged at intervals. The front and rear parts of the top plate are connected by vertical plates B104. The space between the top plate and the bottom plate is a hollow part 105. A plurality of through holes B106 are opened on the top plate, and a plurality of notch openings B107 are opened on the surface of the bottom plate. Each notch opening corresponds to a through hole, and each upper and lower corresponding notch opening and through hole are used to place the test tube A, and the sample is placed in the test tube A; the sample can be centrifuged blood.

[0043] In the embodiment of the present utility model, in order to facilitate the recycling of the used waste pipette tips of the pipette, a waste tip placement opening B301 is formed on the surface of the waste tip box 3.

[0044] In the embodiment of the present utility model, the ELISA plate placement rack B6 includes an upper plate B602 and U-shaped side plates B603 arranged on both sides of the upper plate. A limiting space B604 for placing the ELISA plate is formed between the upper plate and the two U-shaped side plates. A lower plate B605 is arranged below the upper plate, and the upper plate and the lower plate are connected by two support plates B606.

[0045] In order to facilitate the taking and placing of the ELISA plate, notches B607 are arranged at the front and rear parts of the upper plate.

[0046] In the embodiment of the present utility model, the main reagent fixing rack B5 is in a "mouth" shape, and at least two main reagent fixing openings B503 for placing the main reagent test tubes B505 are arranged on the upper part of the main reagent fixing rack.

[0047] In the embodiment of the present utility model, during use: First, place the sample liquid in the test tube A of the sample rack. First, place the sample liquid in the test tube A of the sample rack. First, move the liquid in the test tube A to the test tubes B on two of the heating shakers. Then, add the reagents placed on the reagent placement table into the test tubes B as required for heating and shaking for mixing. Then, transfer the liquid in the test tubes B on the two heating shakers to the test tubes B on the other two heating shakers, add the main reagent and heat and shake for mixing, and at the same time add the required reagents to the test tubes B on the other two heating shakers and shake for mixing. Then, move the processed liquid in the test tubes B into the ELISA plate, and finally detect the liquid in the ELISA plate.

[0048] Each time when sucking the liquid medicine with the pipette as described above, it is necessary to replace the pipette tip of the pipette. The new pipette tip is taken from the pipette fixing plate, and the used pipette tip can be discarded in the waste tip box.

[0049] Embodiment 3: On the basis of Embodiment 2, as Figures 9 - 11 shown, in this embodiment, the pipette tip positioning structure B4 includes a positioning seat B401, a fixing block B402 and a movable pressing block B403 respectively arranged on both sides above the positioning seat. The movable pressing block is fixed on the positioning seat through a rotating shaft B404, and a spring B405 is arranged between the positioning seat and the movable pressing block.

[0050] The pressing part B406 of the above-mentioned movable pressing block extends above the inner cavity of the positioning seat, and under the elastic force of the spring, the pressing part always maintains a downward pressing state.

[0051] In the embodiment of the present utility model, a clamping groove B407 is arranged inside the fixed block, and the cross-section of the clamping groove can be arc-shaped; the cross-section of the above-mentioned movable pressing block is hook-shaped, and the contact surface of the pressing part with the pipetting fixing plate can be a plane.

[0052] In the embodiment of the present utility model, a fixing column B408 is arranged behind the fixed block, and a column cap B409 is arranged above the fixing column.

[0053] In the embodiment of the present utility model, the upper part of the positioning seat is open, and a cavity B411 is arranged in the middle of the positioning seat.

[0054] In the embodiment of the present utility model, an installation groove B412 for installing the movable pressing block is arranged on one side of the positioning seat; the rotating shaft and the spring are arranged in the installation groove.

[0055] In the embodiment of the present utility model, a pipetting fixing plate B413 is installed on the surface of the positioning seat. A plurality of through holes B415 for placing the liquid suction tubes B414 are formed in the pipetting fixing plate. U-shaped clamping grooves B416 are arranged on both sides of the pipetting fixing plate. One of the U-shaped clamping grooves is matched with the fixed block on one side of the positioning seat, and the other U-shaped clamping groove is matched with the movable pressing block on the other side of the positioning seat.

[0056] In the embodiment of the present utility model, a semi-circular groove B417 is further formed on one side of the pipetting fixing plate, and the semi-circular groove abuts against the fixing column of the positioning seat.

[0057] Vertical plates B418 are arranged on the front and rear sides of the surface of the above-mentioned pipetting fixing plate.

[0058] In the embodiment of the present utility model, during installation: align and abut the clamping groove on the left side of the pipetting fixing plate with multiple liquid suction tubes against the fixed block on the left side of the positioning seat. At the same time, the semi-circular groove on the left side of the pipetting fixing plate also abuts against the fixing column. Press the lower part of the movable pressing block to make the upper part of the movable pressing block rotate counterclockwise to the right along the rotating shaft. The pressing part of the movable pressing block leaves the surface of the positioning seat. Then swing the right side of the pipetting fixing plate downward to contact the surface on the right side of the positioning seat. Release the movable pressing block, and the movable pressing block presses the edge part located in the U-shaped clamping groove on the right side of the pipetting fixing plate, thereby limiting the pipetting fixing plate to facilitate the subsequent direct insertion of the washing liquid gun into the liquid suction tubes on the pipetting fixing plate for use.

[0059] For any of the technical solutions disclosed by the present utility model as described above, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical value with obvious technical effects or representativeness among many implementable numerical values. Since there are too many numerical values to list them all, the present utility model only discloses some numerical values to illustrate the technical solutions of the present utility model. Moreover, the listed numerical values should not constitute a limitation to the protection scope of the creation of the present utility model.

[0060] If terms such as "first" and "second" are used in this article to limit components, those skilled in the art should be aware that the use of "first" and "second" is only for the convenience of distinguishing components in description. Unless otherwise stated, the above terms have no special meaning.

[0061] Meanwhile, for the present utility model as described above, if it discloses or involves components or structural members that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (such as using bolts or screws for connection), or it can also be understood as: a non-detachable fixed connection (such as riveting, welding). Of course, the components fixedly connected to each other can also be replaced by an integral structure (such as manufactured by an integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0062] In addition, for any of the technical solutions disclosed by the present utility model, the terms used to represent the positional relationship or shape, unless otherwise stated, include states or shapes that are approximate, similar, or close to it.

[0063] Any component provided by the present utility model can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0064] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it; although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it is still possible to modify the specific implementation manners of the present utility model or make equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present utility model, they should all be covered within the scope of the technical solutions claimed by the present utility model.

Claims

1. A pipetting processing device, characterized in that, It includes a pipetting workbench and a liquid suction mechanism arranged above the pipetting workbench; the pipetting workbench includes a machine table and a sample rack, a heating shaker, a waste tube box, a liquid suction tube positioning structure, a reagent placement table, and an ELISA plate placement rack arranged on the surface of the machine table. On one side surface of the reagent placement table, there are a plurality of grooves for placing reagent bottles, and on the other side surface of the reagent placement table, there is a main reagent fixing rack for placing the main reagent; the liquid suction mechanism includes a Y-direction moving seat and an X-direction moving seat that can move forward and backward along the Y-direction moving seat. There are several injection pumps arranged in front of the X-direction moving seat. The output port of the injection pump is provided with a pipette tip, and a liquid suction tube is inserted below the pipette tip. On the X-direction moving seat, there is a Z-direction driving structure for driving the injection pump, the pipette tip, and the liquid suction tube to lift and lower synchronously. Behind the Y-direction moving seat, there is a Y-direction driving structure for driving the X-direction moving seat to move left and right.

2. The pipetting processing device according to claim 1, wherein An X-direction slider is arranged above the X-direction moving seat. An X-direction guide rail matched with the first slider is arranged on the Y-direction moving seat. A cylinder for driving the X-direction moving seat to move forward and backward along the X-direction guide rail is arranged on the Y-direction moving seat.

3. The pipetting processing device according to claim 1, characterized in that, The Z-direction driving structure includes a Z-direction slide rail arranged in front of the X-direction moving seat. A Z-direction slider is arranged at the rear of the injection pump. The Z-direction slider is slidably matched with the Z-direction slide rail. A screw motor is arranged at the upper part of the X-direction moving seat. The output shaft of the screw motor is in threaded cooperation with the Z-direction slider to drive the Z-direction slider and the pipette tip to move up and down.

4. The pipetting processing device according to claim 1, characterized in that The Y-direction driving structure includes a Y-direction guide rail arranged on the frame. A Y-direction slider that can slide along the Y-direction guide rail is arranged at the rear of the Y-direction moving seat. A synchronous belt is arranged outside the Y-direction moving seat. The Y-direction moving seat is fixedly connected to a certain point at the lower part of the synchronous belt. Synchronous wheels are arranged at both ends of the synchronous belt. One of the synchronous wheels is driven by a Y-direction motor to rotate.

5. The pipetting processing device according to claim 1, wherein, A blanking mechanism is arranged beside the injection pump. The blanking mechanism includes a blanking cylinder fixing plate arranged outside the injection pump. A cylinder is installed on the blanking cylinder fixing plate. A blanking pressing sleeve is sleeved outside the pipette tip. The output shaft of the cylinder is connected to the blanking pressing sleeve through a connecting piece. The width of the blanking pressing sleeve is greater than the width of the upper end of the liquid suction tube.

6. The pipetting processing device according to claim 1, wherein, The sample rack includes a top plate and a bottom plate arranged at intervals. The front and rear parts of the top plate are connected by vertical plates. The space between the top plate and the bottom plate is a hollow part. Through openings are arranged on the top plate. Groove openings are arranged on the surface of the bottom plate. Each groove opening corresponds to a through opening. The corresponding groove openings and through openings are used for placing test tube A.

7. The pipetting processing device according to claim 1, characterized in that, Waste tube placement openings are arranged on the surface of the waste tube box.

8. The pipetting processing device according to claim 1, characterized in that, The liquid suction tube positioning structure includes a positioning seat, a fixed block and a movable pressing block respectively arranged on both sides above the positioning seat. The movable pressing block is fixed to the positioning seat through a rotating shaft. A spring is arranged between the positioning seat and the movable pressing block; a clamping groove is arranged inside the fixed block; a fixed column is arranged behind the fixed block, and a column cap is arranged above the fixed column; the upper part of the positioning seat is in an open shape, and a cavity is arranged in the middle of the positioning seat; an installation groove for installing the movable pressing block is arranged on one side of the positioning seat.

9. The pipetting processing device according to claim 8, wherein, A pipetting fixing plate is mounted on the surface of the positioning seat. A plurality of through holes for placing pipette tubes are formed in the pipetting fixing plate. U-shaped clamping grooves are arranged on both sides of the pipetting fixing plate. One of the U-shaped clamping grooves is matched with a fixed block on one side of the positioning seat, and the other U-shaped clamping groove is matched with a movable pressing block on the other side of the positioning seat. A semi-circular groove is also formed on one side of the pipetting fixing plate, and the semi-circular groove abuts against a fixed column of the positioning seat.

10. The pipetting processing device according to claim 1, wherein The ELISA plate placement rack includes an upper plate and U-shaped side plates arranged on both sides of the upper plate. The upper plate and the two U-shaped side plates form a limiting space for placing ELISA plates. A lower plate is arranged below the upper plate, and the upper plate and the lower plate are connected by two support plates. Notches are arranged at the front and rear parts of the upper plate.

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