Centrifugal device and sample pre-treatment system

Abstract

The application relates to a centrifugal device and a sample pretreatment system, the centrifugal device comprising: a feeding port and a discharging port; a centrifuge for centrifugal treatment of mixed liquid contained in a sampling tube; two temporary storage mechanisms, a feeding temporary storage mechanism arranged on one side of the feeding port and a discharging temporary storage mechanism arranged on one side of the discharging port; and two sampling mechanisms; the feeding temporary storage mechanism is used for storing the sampling tube transported to the centrifugal device, the feeding temporary storage mechanism is also used for moving the sampling tube to above the feeding port in a horizontal direction, the feeding sampling mechanism is used for placing the sampling tube moved to above the feeding port into the centrifuge in a vertical direction, the discharging sampling mechanism is used for moving the sampling tube in the centrifuge to above the discharging port in a vertical direction, and the discharging temporary storage mechanism is used for receiving the sampling tube moved to above the discharging port by the discharging sampling mechanism and storing the sampling tube. The application not only improves the feeding and discharging efficiency, but also can match the batch rhythm of front and rear sequence equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pesticide residue detection, in particular to a centrifugal device and a sample pretreatment system. BACKGROUND

[0002] The accuracy and reliability of the pesticide residue detection results of fruit and vegetable products depend largely on the standardization and efficiency of sample pretreatment. In the sample pretreatment process, centrifugal processing is the core process for separating liquid and solid particles in the mixed solution to form supernatant. However, the existing centrifugal device relies on manual or single mechanical arm for feeding and discharging, which not only has limited single processing capacity but also is difficult to match the batch rhythm of the front and rear equipment, thus easily forming a process bottleneck. SUMMARY

[0003] The centrifugal device and the sample pretreatment system provided by the embodiments of the present application not only improve the feeding and discharging efficiency, but also match the batch rhythm of the front and rear equipment.

[0004] In a first aspect, the centrifugal device provided by the embodiments of the present application comprises:

[0005] a feeding port and a discharging port arranged oppositely;

[0006] a centrifuge arranged below the feeding port and the discharging port, used for centrifugal processing of a mixed solution contained in a sampling tube;

[0007] two temporary storage mechanisms, i.e. a feeding temporary storage mechanism and a discharging temporary storage mechanism, the feeding temporary storage mechanism being arranged at one side of the feeding port, and the discharging temporary storage mechanism being arranged at one side of the discharging port; and

[0008] two material taking mechanisms, i.e. a feeding material taking mechanism arranged at the feeding port and a discharging material taking mechanism arranged at the discharging port;

[0009] The feeding temporary storage mechanism is used for storing the sampling tube transported to the centrifugal device, and is further used for moving the sampling tube to above the feeding port in a horizontal direction. The feeding material taking mechanism is used for placing the sampling tube moved to above the feeding port in the centrifuge in a vertical direction. The discharging material taking mechanism is used for moving the sampling tube in the centrifuge to above the discharging port in a vertical direction. The discharging temporary storage mechanism is used for receiving the sampling tube moved to above the discharging port by the discharging material taking mechanism and storing the sampling tube.

[0010] In a second aspect, the sample pretreatment system provided by the embodiments of the present application comprises the centrifugal device provided by the first aspect.

[0011] Compared with the prior art, the beneficial effects of the embodiments of this application are as follows: The centrifuge device and sample pretreatment system have an infeed temporary storage mechanism that can receive the previous sampling tubes in batches and cooperate with the infeed unloading mechanism to transport them in batches according to the centrifuge's requirements. The outfeed temporary storage mechanism can collect the sampling tubes output in batches by the outfeed unloading mechanism and then supply them to the subsequent equipment in a unified manner. This not only improves the efficiency of loading and unloading and eliminates process bottlenecks, but also ensures smooth process connection. Moreover, the unloading mechanism can avoid trajectory deviation and collision risks caused by horizontal movement by moving the sampling tubes vertically, and the temporary storage mechanism can accurately complete batch transfer and quantity allocation by moving the sampling tubes horizontally. The two have simple actions and clear division of labor, which not only improves the stability and accuracy of sampling tube transfer, but also simplifies the device control logic and ensures efficient connection between the centrifuge device and the previous and subsequent devices. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the sample pretreatment system structure in an embodiment of this application.

[0013] Figure 2 This is a partial structural schematic diagram of the sample pretreatment system according to an embodiment of this application.

[0014] Figure 3 for Figure 2 A magnified view of a portion of the A-structure.

[0015] Figure 4 This is a schematic diagram of the liquid injection device and the first capping device in the sample pretreatment system of this application embodiment.

[0016] Figure 5 This is a schematic diagram of the oscillation device in the sample pretreatment system of this application embodiment.

[0017] Figure 6 This is a schematic diagram of the first gripping device in the sample pretreatment system of this application embodiment.

[0018] Figure 7 This is a schematic diagram of the second gripping device and the pipetting device in the sample pretreatment system of this application embodiment.

[0019] Figure 8 This is a schematic diagram of the capping device in the sample pretreatment system of this application embodiment.

[0020] Figure 9 for Figure 8 A partial structural diagram from another perspective.

[0021] Figure 10 for Figure 9 A magnified view of the local B structure.

[0022] Figure 11 for Figure 9 CC section view.

[0023] Figure 12 for Figure 2 Another perspective illustration.

[0024] Figure 13 for Figure 12 A partial structural diagram of the DD cross-section.

[0025] Figure 14 for Figure 12 A magnified view of the local E-structure.

[0026] Figure 15 for Figure 14 Rear view.

[0027] Figure 16 This is a schematic diagram of a centrifuge device according to an embodiment of this application.

[0028] Figure 17 for Figure 16 A magnified view of a portion of the F-structure.

[0029] Figure 18 This is a schematic diagram of the temporary storage mechanism in the centrifuge device according to an embodiment of this application.

[0030] Figure 19 for Figure 2 Another perspective illustration.

[0031] Figure 20 for Figure 19 Enlarged view of the filtration device and experimental bottle fixture in the sample pretreatment system shown.

[0032] Figure 21 for Figure 19 An enlarged view of the unloading device in the sample pretreatment system shown. Detailed Implementation

[0033] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0035] Unless otherwise defined, 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 application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0036] The centrifugal device 6 provided by the embodiments of the present application is applied to the sample pretreatment system provided by the embodiments of the present application. In order to facilitate understanding, the sample pretreatment system of the embodiments of the present application is first described.

[0037] Please refer to Figures 1 to 21 The sample pretreatment system provided by the embodiments of the present application includes a grabbing device 1, a cap screwing device 2, a liquid injection device 3, a mixing device, a centrifugal device 6, a filtering device 7, a pipetting device 8 and a carrying device 9. The grabbing device 1 is used to hold the cap 902 of the sampling tube 90. The cap screwing device 2 is used to hold the tube body 901 of the sampling tube 90. The cap screwing device 2 is also used to hold the tube body 901 to rotate when the grabbing device 1 holds the cap 902, so as to unscrew or screw the cap 902 relative to the tube body 901. The liquid injection device 3 is used to inject an organic solvent into the tube body 901 held by the cap screwing device 2 and containing a sample to be detected, so as to obtain a mixed liquid composed of the organic solvent and the sample to be detected. The mixing device is used to mix and process the mixed liquid in the sampling tube 90, so as to fully mix the organic solvent and the sample to be detected. The centrifugal device 6 is used to centrifugally process the mixed liquid mixed and processed in the sampling tube 90, so as to obtain a supernatant. The filtering device 7 is used to filter the supernatant, so as to obtain a filtrate. The pipetting device 8 is used to suck at least part of the supernatant in the sampling tube 90 into a pipette 100. The pipetting device 8 is also used to inject the supernatant in the pipette 100 into the filtering device 7. The carrying device 9 is used to drive the grabbing device 1 to move, so as to carry the sampling tube 90 to the cap screwing device 2. The carrying device 9 is also used to drive the grabbing device 1 to move, so as to carry the sampling tube 90 to the mixing device. The carrying device 9 is also used to drive the grabbing device 1 to move, so as to carry the sampling tube 90 to the centrifugal device 6. The carrying device 9 is also used to drive the pipetting device 8 to move from the cap screwing device 2 to the filtering device 7. When the cap screwing device 2 holds the tube body 901 to rotate, the carrying device 9 is also used to drive the grabbing device 1 holding the cap 902 to move in the direction (for example, the up-down direction) close to or away from the tube body 901, so as to unscrew or screw the cap 902.

[0038] The embodiments of the present application realize the automatic operation of the sample pretreatment process through the cooperation of the grabbing device 1, the capping device 2, the liquid injection device 3, the mixing device, the centrifugal device 6, the filtering device 7, the pipetting device 8 and the conveying device 9, reduce the operation time, improve the processing efficiency, avoid the problems of liquid leakage, cross contamination, unstable parameters and the like caused by manual operation differences, guarantee the consistency of the pretreatment effect, provide a guarantee for the accuracy of the subsequent pesticide residue detection data, and reduce the direct contact between the human body and the organic solvent and the sample, thereby reducing the safety risk. Moreover, in the capping process, only the pipe body 901 rotates and the cover body 902 lifts to realize the uncapping and capping of the cover body 902, so that the cover body 902 does not need to bear the rotating torque and only needs to move along the pipe body 901 in the axial (vertical) direction smoothly following the thread stroke brought by the rotation of the pipe body 901, which reduces the stress concentration of the cover body 902 caused by the simultaneous bearing of the clamping force and the rotating force and the frictional damage of the cover body 902 with the capping device 2, avoids the additional friction or extrusion caused by the asynchronization between the rotation and lifting of the cover body 902 in the related art, thereby reducing the risk of the cover body 902 of being scratched, deformed and the like, balances the stability and efficiency of the uncapping and capping and the integrity of the cover body 902, prolongs the service life of the cover body 902, and enables the sampling tube 90 to bear multiple or even repeated uncapping and capping operations.

[0039] In some embodiments, please refer to Figure 1 and Figure 2, the twisting device 2 comprises a first twisting device 2a and a second twisting device 2b, the grabbing device 1 comprises a first grabbing device 1a and a second grabbing device 1b, the carrying device 9 comprises a first carrying device 9a and a second carrying device 9b, the first carrying device 9a is arranged at the output end of the first carrying device 9a, the second carrying device 9b is arranged at the output end of the second carrying device 9b, the first grabbing device 1a is arranged at the output end of the first carrying device 9a, the second grabbing device 1b and the pipetting device 8 are arranged at the output end of the second carrying device 9b. The first carrying device 9a is used to drive the first grabbing device 1a to move to carry the sample tube 90 from the sample tube placing seat 10 to the first twisting device 2a, the first carrying device 9a is also used to drive the first grabbing device 1a to move to carry the sample tube 90 from the first twisting device 2a to the mixing device, the first carrying device 9a is also used to drive the first grabbing device 1a to move to carry the sample tube 90 from the mixing device to the centrifugal device 6, the first carrying device 9a is also used to drive the first grabbing device 1a to lift the cover body 902 to twist the cover body 902 when the first twisting device 2a holds the tube body 901 to rotate, the liquid injection device 3 is used to inject the organic solvent into the tube body 901 held by the first twisting device 2a and containing the sample to be detected, the second carrying device 9b is used to drive the second grabbing device 1b to move to carry the sample tube 90 from the centrifugal device 6 to the second twisting device 2b, the second carrying device 9b is also used to drive the second grabbing device 1b to lift the cover body 902 to twist the cover body 902 when the second twisting device 2b holds the tube body 901 to rotate, and the second carrying device 9b is also used to drive the pipetting device 8 to move from the second twisting device 2b to the filtering device 7. As an example, the second grabbing device 1b and the pipetting device 8 are respectively fixed at the output end of the second carrying device 9b, and there is a gap between the second grabbing device 1b and the pipetting device 8, so as to avoid interference during work.

[0040] In the embodiment, the twisting device 2 comprises a first twisting device 2a and a second twisting device 2b, the grabbing device 1 comprises a first grabbing device 1a and a second grabbing device 1b, and the carrying device 9 comprises a first carrying device 9a and a second carrying device 9b, so that the process congestion caused by the single carrying device, the grabbing device and the twisting device during the whole process can be avoided, and the total processing period of a single batch of samples can be shortened. Meanwhile, the twisting device 2, the carrying device 9 and the grabbing device 1 are divided into two groups of devices to independently complete different stages, so that the chain effect of a single device failure on the whole process can be reduced. As an example, the first twisting device 2a and the second twisting device 2b are the same in structure, the first grabbing device 1a and the second grabbing device 1b are the same in structure, and the first carrying device 9a and the second carrying device 9b are the same in structure.

[0041] As an example, the first carrying device 9a and the second carrying device 9b can be a mechanical hand.

[0042] As an embodiment, the workflow of the sample pre-treatment system is as follows: after the first grabbing device 1a clamps the cover 902 of the sample tube 90 on the sample tube placing seat 10, the first carrying device 9a drives the first grabbing device 1a to move, so that the first grabbing device 1a carries the sample tube 90 from the sample tube placing seat 10 to the first capping device 2a. After the sample tube 90 is placed on the first capping device 2a, the first grabbing device 1a still clamps the cover 902 of the sample tube 90, the first capping device 2a clamps the tube body 901 of the sample tube 90, and then the first capping device 2a drives the tube body 901 to rotate. During the rotation of the tube body 901, the first carrying device 9a drives the first grabbing device 1a to move upward with the cover 902 clamped, so that the cover 902 can be unscrewed relative to the tube body 901 and separated from the tube body 901. After the cover 902 is separated from the tube body 901, the liquid injection device 3 injects organic solvent into the tube body 901, and the sample to be detected in the tube body 901 is mixed with the organic solvent to form a mixed solution. Then the first carrying device 9a drives the first grabbing device 1a to move downward with the cover 902 clamped, and the first capping device 2a drives the tube body 901 to rotate, so that the cover 902 can be screwed relative to the tube body 901. After the cover 902 is screwed, the first capping device 2a releases the tube body 901, and the first carrying device 9a drives the first grabbing device 1a to move, so that the first grabbing device 1a carries the sample tube 90 from the first capping device 2a to the mixing device. After the sample tube 90 is carried to the mixing device, the first grabbing device 1a releases the sample tube 90, and the mixing device mixes and processes the mixed solution in the sample tube 90 to ensure that the target detection substance (such as a pesticide residue component) in the sample to be detected is uniformly and fully dissolved or dispersed in the organic solvent. As an example, the organic solvent can be acetonitrile. After the mixing and processing is completed, the first grabbing device 1a clamps the cover 902 of the sample tube 90 again, and then the first carrying device 9a drives the first grabbing device 1a to move, so that the first grabbing device 1a carries the sample tube 90 from the mixing device to the centrifugal device 6. After the sample tube 90 is carried to the centrifugal device 6, the first grabbing device 1a releases the sample tube 90, and the centrifugal device 6 performs centrifugal processing on the mixed solution contained in the sample tube 90 to make the mixed solution stratify. Since the sample to be detected may contain solid particles such as plant tissue debris and soil particles, the density of the solid particles is much greater than that of the organic solvent, and under the action of the centrifugal force, the solid particles will settle at the bottom of the sample tube 90 to form a precipitate layer, and the target detection substance will be suspended in the supernatant to form a supernatant because it is dissolved in the organic solvent with smaller density. After the centrifugal processing is completed, the second grabbing device 1b clamps the cover 902 of the sample tube 90, and then the second carrying device 9b drives the second grabbing device 1b to move, so that the second grabbing device 1b carries the sample tube 90 from the centrifugal device 6 to the second capping device 2b.After the sampling tube 90 is placed on the second capping device 2b, the second gripping device 1b holds the cap 902 of the sampling tube 90, the second capping device 2b holds the tube body 901 of the sampling tube 90, and then the second capping device 2b drives the tube body 901 to rotate. During the rotation of the tube body 901, the second gripping device 1b is driven by the second carrying device 9b to move upward with the cap 902 held, so that the cap 902 can be unscrewed from the tube body 901 and separated from the tube body 901. After the cap 902 is separated from the tube body 901, the second gripping device 1b holds the cap 902 of the sampling tube 90, the second carrying device 9b drives the pipetting device 8 to move to the pipette placement seat 20, so that the pipetting device 8 can obtain the pipette 100 on the pipette placement seat 20, and then the second carrying device 9b drives the pipetting device 8 holding the pipette 100 to move from the pipette placement seat 20 to the second capping device 2b, and inserts the pipette 100 into the tube body 901, and then the pipetting device 8 sucks at least part of the supernatant in the sampling tube 90 into the pipette 100. After the supernatant is sucked, the second carrying device 9b drives the pipetting device 8 holding the pipette 100 to move from the second capping device 2b to the filtering device 7. Then the pipetting device 8 injects the supernatant in the pipette 100 into the filtering device 7, and the filtering device 7 filters the supernatant to obtain the filtrate, and the experimental bottle 300 on the experimental bottle jig 40 receives the filtrate for subsequent detection and other processing.

[0043] In the embodiment, if the cap 902 is in the screwed state, when the first gripping device 1a (the second gripping device 1b) grips and moves the cap 902, the first gripping device 1a (the second gripping device 1b) moves the entire sampling tube 90. If the cap 902 is in the unscrewed state, when the first gripping device 1a (the second gripping device 1b) grips and moves the cap 902, the first gripping device 1a (the second gripping device 1b) moves the cap 902. In addition, the second gripping device 1b and the pipetting device 8 are arranged on the output end of the second carrying device 9b, so when the second carrying device 9b drives one of the second gripping device 1b and the pipetting device 8 to move, the other one also moves synchronously.

[0044] In some embodiments, please refer to Figure 6 and Figure 7The grabbing device 1 comprises a plurality of grabbing assemblies 11, each of which can grab the cover 902 of one sampling tube 90, that is, the plurality of grabbing assemblies 11 can simultaneously grab the covers 902 of a plurality of sampling tubes 90. Each grabbing assembly 11 comprises a grabbing drive 111 fixed to the output end of the conveying device 9 and at least two first clamping jaw members 112 arranged at the output end of the grabbing drive 111. The grabbing drive 111 is used to drive all the first clamping jaw members 112 to move towards each other to clasp the cover 902 in cooperation, and is also used to drive all the first clamping jaw members 112 to move away from each other to separate the first clamping jaw members 112 from the cover 902 to release the cover 902. As an example, each grabbing assembly 11 comprises two first clamping jaw members 112, and the grabbing drive 111 is a clamping cylinder that can simultaneously drive the two first clamping jaw members 112 to move towards each other or move away from each other.

[0045] In the embodiment, the grabbing drive 111 can drive all the first clamping jaw members 112 to move towards each other, so that all the first clamping jaw members 112 cooperate with each other to form a stable clamping force, thereby reliably clamping the cover 902 of the sampling tube 90, avoiding loosening and falling of the cover 902 during conveying or capping. At the same time, the grabbing drive 111 can also drive the first clamping jaw members 112 to move away from each other, quickly releasing the clamping of the cover 902, and achieving convenient release of the cover 902. Moreover, the plurality of grabbing assemblies 11 can simultaneously correspond to a plurality of sampling tubes 90, and can simultaneously clamp and release the covers 902 of the plurality of sampling tubes 90, without processing the single sampling tube 90 one by one, effectively improving the efficiency of the sample pretreatment process, and can be suitable for batch sample processing scenarios.

[0046] As an embodiment, please refer to Figure 6 and Figure 7 The grabbing device 1 comprises four grabbing assemblies 11 arranged in sequence and at intervals, each of which is used to grab the cover 902 of one sampling tube 90, that is, the grabbing device 1 can simultaneously grab the covers 902 of 4 sampling tubes 90. In some examples, each grabbing assembly 11 comprises two first clamping jaw members 112. The grabbing drive 111 can drive the two first clamping jaw members 112 to move towards each other to clasp the cover 902 in cooperation, and can also drive the two first clamping jaw members 112 to move away from each other to separate the first clamping jaw members 112 from the cover 902 to release the cover 902.

[0047] As an example, the gripping assembly 11 has a relative gripping state and a releasing state. The gripping assembly 11 in the gripping state is used to hold the cover 902, and the first jaw member 112 of the gripping assembly 11 in the gripping state cooperatively clamps the cover 902. The gripping assembly 11 in the releasing state is used to release the cover 902, and the first jaw member 112 of the gripping assembly 11 in the releasing state is separated from the cover 902. The first jaw member 112 includes a relative inner surface and an outer surface, and an abutting surface 1121 connected between the inner surface and the outer surface. The inner surface of the first jaw member 112 is provided with a clamping surface 1122 recessed inwardly relative to the inner surface of the first jaw member 112. The inner surface of the first jaw member 112 includes a first inner surface 1123 at an upper end of the clamping surface 1122 and a second inner surface 1124 at a lower end of the clamping surface 1122. The first jaw member 112 further includes a first connecting surface 1125 connected between the clamping surface 1122 and the first inner surface 1123, and a second connecting surface 1126 connected between the clamping surface 1122 and the second inner surface 1124. When the gripping assembly 11 is in the gripping state, the outer peripheral surface 9021 of the cover 902 abuts against the clamping surface 1122 of the two first jaw members 112, that is, the clamping surface 1122 of the two first jaw members 112 cooperatively clamps the outer peripheral surface 9021 of the cover 902. Meanwhile, the lower end surface 9022 of the cover 902 abuts against the second connecting surface 1126 of the two first jaw members 112, that is, the second connecting surface 1126 of the two first jaw members 112 supports the lower end of the lower end surface 9022 of the cover 902. Meanwhile, there is a gap between the outer peripheral surface 9011 of the tube body 901 and the second inner surface 1124 of the two first jaw members 112. That is, the tube body 901 does not contact the gripping assembly 11.

[0048] In the embodiment, when the gripping assembly 11 is in the gripping state, the clamping surface 1122 of the first jaw member 112 abuts against the outer peripheral surface 9021 of the cover 902, which can conform to the shape of the cover 902 to form a stable clamping, avoid the cover 902 from loosening or falling during the carrying or capping process, and reduce the local extrusion damage to the outer peripheral surface 9021 of the cover 902, so that the cover 902 can withstand multiple or even repeated capping operations. Meanwhile, the second connecting surface 1126 of the two first jaw members 112 supports the lower end surface 9022 of the cover 902, which not only further enhances the stability of the clamping of the cover 902, but also reduces the displacement or falling of the cover 902 during the lifting process. In addition, the gap between the outer peripheral surface of the tube body 901 and the second inner surface 1124 not only avoids unnecessary friction or collision between the first jaw member 112 and the tube body 901, prevents the tube body 901 or the first jaw member 112 from being damaged, but also provides space for the rotation of the tube body 901 during the subsequent capping, avoiding the interference of the first jaw member 112 with the rotation of the tube body 901.

[0049] In some examples, when the grabbing assembly 11 is in the grabbing state, the clamping surface 1122 is completely fitted on the outer circumferential surface 9021 of the cover 902, so as to maximize the contact area between the first clamping jaw 112 and the cover 902, thereby improving the stability of the clamping of the cover 902 to avoid loosening and falling, and dispersing the clamping force to reduce the local extrusion damage to the surface of the cover 902. For example, the outer circumferential surface 9021 of the cover 902 is a cylindrical surface, and the clamping surface 1122 can be a semi-cylindrical surface. For example, the outer circumferential surface 9021 of the cover 902 is a square column surface, and the clamping surface 1122 can be a square column surface. For example, if the outer circumferential surface 9021 of the cover 902 is a surface with a pattern, the clamping surface 1122 can be a surface with the same pattern.

[0050] In some examples, when the grabbing assembly 11 is in the grabbing state, the upper end surface 9023 of the cover 902 abuts against the first connecting surface 1125 of the two first clamping jaws 112. That is, the cover 902 is clamped between the first connecting surface 1125 and the second connecting surface 1126, thereby limiting the cover 902 in the vertical direction to avoid the cover 902 from moving up and down during the lifting of the cover during the carrying or capping, further improving the stability of the clamping, and dispersing the axial stress of the cover 902 to reduce the risk of local extrusion deformation.

[0051] In some examples, when the grabbing assembly 11 is in the grabbing state, the abutting surfaces 1121 of the two first clamping jaws 112 abut against each other. For example, the outer circumferential surface 9021 of the cover 902 is a cylindrical surface, and the clamping surfaces 1122 of the two first clamping jaws 112 can abut against each other to form a closed cylindrical surface. The closed cylindrical surface is completely fitted on the outer circumferential surface 9021 of the cover 902, forming a ring-shaped stable clamping, and maximizing the limitation of the cover 902 from shifting or rotating during the carrying or capping, thereby further enhancing the stability of the clamping.

[0052] In some examples, when the grabbing assembly 11 is in the grabbing state, the abutting surfaces 1121 of the two first clamping jaws 112 can have a gap therebetween. The gap between the abutting surfaces 1121 can accommodate the size deviation of the cover 902, and provide a certain adjustment space for the clamping action of the clamping jaw, thereby improving the compatibility of the size of the cover 902.

[0053] In some examples, please refer to Figure 6 and Figure 7The output end of the grabbing driving member 111 is fixed to the upper end of the first clamping jaw member 112, the second inner surface 1124 is recessed inward relative to the first inner surface 1123, and the thickness of the upper end of the first clamping jaw member 112 is greater than the thickness of the lower end of the first clamping jaw member 112. In the embodiment, the output end of the grabbing driving member 111 is fixed to the upper end of the first clamping jaw member 112, the second inner surface 1124 is recessed inward relative to the first inner surface 1123, and the thickness of the upper end of the first clamping jaw member 112 is greater than the thickness of the lower end of the first clamping jaw member 112, which can not only enhance the stability of the connection between the grabbing driving member 111 and the first clamping jaw member 112 through the thick structure of the upper end, but also reserve sufficient space for the lower pipe body 901 to avoid interference, while ensuring the stable positioning of the first connecting surface 1125 to the upper part of the cover body 902.

[0054] In some examples, referring to Figure 6 and Figure 7 , the first clamping jaw member 112 further comprises a recessed surface 1127 recessed inward relative to the abutting surface 1121, and the recessed surface 1127 is formed at the lower end of the clamping surface 1122 and connected with the second inner surface 1124. When the grabbing assembly 11 is in the grabbing state, there is a gap between the recessed surfaces 1127 of the two first clamping jaw members 112, which can avoid interference between the first clamping jaw member 112 and the pipe body 901 (especially the joint between the cover body 902 and the lower pipe body 901).

[0055] It should be noted that in other embodiments, the grabbing device can also include other numbers of grabbing assemblies, and the grabbing assembly can also include other numbers of first clamping jaw members, which can be set according to actual conditions, and will not be described here.

[0056] In some embodiments, referring to Figures 8 to 11 , the cap screwing device 2 comprises a guide plate 21, a supporting assembly 22, a clamping assembly 23 and a rotating assembly 24, the guide plate 21 defines a first limiting hole 211, the pipe body 901 is arranged in the first limiting hole 211, the supporting assembly 22 is arranged at the lower end of the guide plate 21 in a spaced manner, the supporting assembly 22 is used for supporting the pipe body 901 arranged in the first limiting hole 211, the clamping assembly 23 is used for clamping the pipe body 901 supported by the supporting assembly 22, and the rotating assembly 24 is used for driving the pipe body 901 clamped by the clamping assembly 23 to rotate.

[0057] In the embodiment, the guide plate 21 limits the pipe body 901 through the first limiting hole 211 to avoid shaking of the pipe body 901. The supporting assembly 22 is arranged at the lower end of the guide plate 21 in a spaced manner, which can stably lift the pipe body 901 from below to provide reliable axial support for the pipe body 901 and prevent the pipe body 901 from sinking due to its own weight or operating force. The clamping assembly 23 further clamps and fixes the supported pipe body 901 to ensure that the pipe body 901 does not loosen or shift during rotation and ensure that the external threads of the pipe body 901 accurately match the internal threads of the cover body 902.

[0058] As an implementation, please refer to Figures 8 to 11 The pipe body 901 includes a cylindrical section 9012 and a tapered section 9013 connected to the lower end of the cylindrical section 9012, the outer diameter of the tapered section 9013 gradually decreases from top to bottom, and the outer peripheral surface 9011 of the pipe body 901 refers to the outer peripheral surface of the cylindrical section 9012. The cylindrical section 9012 is arranged in the first limiting hole 211, and the support assembly 22 is provided with a second limiting hole 221 coaxially arranged with the first limiting hole 211, and the diameter of the second limiting hole 221 is greater than the diameter of the lower end of the tapered section 9013 and less than the diameter of the upper end of the tapered section 9013. In this embodiment, the cylindrical section 9012 of the pipe body 901 is arranged in the first limiting hole 211 of the guide plate 21, and the first limiting hole 211 can radially constrain the cylindrical section 9012, and the second limiting hole 221 provided on the support assembly 22 is coaxially arranged with the first limiting hole 211, which can ensure that the pipe body 901 remains vertical in the axial direction (vertical direction), avoids the pipe body 901 from tilting, and further improves the positioning accuracy. Moreover, the diameter of the second limiting hole 221 is greater than the diameter of the lower end of the tapered section 9013 and less than the diameter of the upper end of the tapered section 9013, so that the lower end of the tapered section 9013 can smoothly pass into the second limiting hole 221, and the upper end of the tapered section 9013 (because of the larger diameter) is blocked by the edge of the second limiting hole 221 to form a stable axial support, effectively preventing the pipe body 901 from falling downward during subsequent rotation and operation. In addition, the first limiting hole 211 and the second limiting hole 221 can also ensure that when the rotating assembly 24 drives the clamping assembly 23 to rotate the pipe body 901, the rotation trajectory of the pipe body 901 is stable and free of eccentric shaking, which not only avoids the thread matching deviation caused by the tilting of the pipe body 901, but also reduces the additional friction between the pipe body 901 and other components during rotation, thereby ensuring the smoothness and accuracy of the cap opening and closing operation.

[0059] In some embodiments, please refer to Figure 8 The guide plate 21 is provided with a plurality of first limiting holes 211, the cap screwing device 2 includes a plurality of support assemblies 22 and a plurality of clamping assemblies 23, and the number of first limiting holes 211, the number of support assemblies 22 and the number of clamping assemblies 23 are equal. For example, the guide plate 21 is provided with four first limiting holes 211, the cap screwing device 2 includes four support assemblies 22 and four clamping assemblies 23, and the cap screwing device 2 can simultaneously hold the pipe bodies 901 of four sample tubes 90, and the rotating assembly 24 can simultaneously drive the pipe bodies 901 of the four sample tubes 90 on the cap screwing device 2 to rotate synchronously. As an example, the number of first limiting holes 211, the number of support assemblies 22 and the number of clamping assemblies 23 are equal to the number of grabbing assemblies 11, which can realize synchronous positioning, supporting, clamping and grabbing operations of multiple sample tubes 90, improve the batch efficiency of sample pretreatment and ensure the collaborative adaptation of various devices.

[0060] In some embodiments, referring to Figure 10 and Figure 11 , the clamping assembly 23 comprises a clamping drive 231 and clamping members 232, the clamping members 232 comprising a rotation limiting shaft 2321 and at least two second clamping jaw members 2322. As an example, each clamping member 232 can comprise three second clamping jaw members 2322. The rotation limiting shaft 2321 is slidably arranged in the support assembly 22, the rotation limiting shaft 2321 is coaxially connected to the upper end of the output shaft 2311 of the clamping drive 231, and the rotation limiting shaft 2321 can rotate relative to the output shaft 2311 of the clamping drive 231 about the axis of the rotation limiting shaft 2321. All the second clamping jaw members 2322 are evenly distributed around the axis of the rotation limiting shaft 2321, the upper end of the second clamping jaw members 2322 has a clamping portion 23223 for clamping the pipe body 901, the middle part of the second clamping jaw members 2322 is rotatably connected to the support assembly 22, and the lower end of the second clamping jaw members 2322 is connected to the rotation limiting shaft 2321 through a connecting rod 2323, the connecting rod 2323 is rotatably connected to the second clamping jaw members 2322 and the rotation limiting shaft 2321 respectively. The output shaft 2311 of the clamping drive 231 can move up and down to drive the clamping portion 23223 to clamp or release the pipe body 901. The rotation assembly 24 is used to drive the support assembly 22 to rotate about the axis of the rotation limiting shaft 2321 to make the clamping members 232 rotate about the axis of the rotation limiting shaft 2321. As an example, the clamping drive 231 is a pneumatic cylinder.

[0061] In this embodiment, the output shaft 2311 of the clamping drive 231 can move upward to an extended state, the clamping members 232 clamp the pipe body 901 when the clamping drive 231 is in the extended state, and the output shaft 2311 of the clamping drive 231 can also move downward to a retracted state, the clamping members 232 release the pipe body 901 when the clamping drive 231 is in the retracted state. During the upward movement of the output shaft 2311 of the clamping drive 231, the rotation limiting shaft 2321 moves upward with the output shaft 2311 of the clamping drive 231, thereby pushing the lower end of the second clamping jaw members 2322 outward through the connecting rod 2323 to rotate the upper end of the second clamping jaw members 2322 inward, that is, to make the clamping portions 23223 of all the second clamping jaw members 2322 move towards each other to clamp the pipe body 901. During the downward movement of the output shaft 2311 of the clamping drive 231, the rotation limiting shaft 2321 moves downward with the output shaft 2311 of the clamping drive 231, thereby pulling the lower end of the second clamping jaw members 2322 inward through the connecting rod 2323 to rotate the upper end of the second clamping jaw members 2322 outward, that is, to make the clamping portions 23223 of all the second clamping jaw members 2322 move away from each other to release the pipe body 901.

[0062] As an embodiment, referring to Figure 3and Figures 8 to 11 The sample pretreatment system comprises a bottom plate 30, and the guide plate 21 is fixed above the bottom plate 30. The bottom plate 30 is provided with a clearance hole 301 corresponding to the guide plate 21, and the cap screwing device 2 further comprises a first mounting plate 251 fixed to the bottom plate 30, and the first mounting plate 251 is located below the clearance hole 301. The support assembly 22 is rotatably installed on the first mounting plate 251 through a first bearing 261. Moreover, the support assembly 22 is provided with a first guide hole 222 and a second guide hole 223, the axis of the first guide hole 222 is collinear with the axis of the rotation limiting shaft 2321, the number of the second guide hole 223 is the same as the number of the second jaw piece 2322, and the second guide hole 223 is uniformly distributed around the circumference of the first guide hole 222. One end of the connecting rod 2323 is rotatably connected to the rotation limiting shaft 2321, and the other end of the connecting rod 2323 passes through the second guide hole 223 and is rotatably connected to the second jaw piece 2322. When the rotation assembly 24 drives the support assembly 22 to rotate around the axis of the rotation limiting shaft 2321, the second jaw piece 2322 will also rotate with the support assembly 22 because the second jaw piece 2322 is connected to the support assembly 22, so that the pipe body 901 clamped by the second jaw piece 2322 can also rotate around the axis of the rotation limiting shaft 2321.

[0063] By way of example, reference will be made to Figure 11The first guide hole 222 comprises a first hole section 2221 and a second hole section 2222 communicated with the upper end of the first hole section 2221, the diameter of the second hole section 2222 is greater than that of the first hole section 2221, and the second guide hole 223 is arranged on the hole wall of the second hole section 2222. The rotation limiting shaft 2321 comprises a shaft section 23211 and a limiting section 23212 fixed to the upper end of the shaft section 23211, the shaft section 23211 is movably arranged in the first hole section 2221, the limiting section 23212 comprises a limiting block 23213 movably arranged in the second hole section 2222 and a plurality of first limiting arms 23214 uniformly and protrudingly arranged on the circumference of the limiting block 23213, the first limiting arms 23214 are arranged in one-to-one correspondence with the second guide holes 223, the first limiting arms 23214 are movably inserted into the corresponding second guide holes 223, the two side surfaces 23214a of the first limiting arms 23214 arranged in the horizontal direction are respectively in sliding contact with the two hole walls 223a of the second guide holes 223 arranged in correspondence, the first limiting arms 23214 are connected in one-to-one correspondence with the connecting rods 2323, the first limiting arms 23214 are provided with first limiting grooves 23215, one end of the connecting rods 2323 is rotatably connected into the first limiting grooves 23215, and the other end of the connecting rods 2323 is rotatably connected into the assembly hole 23224 of the second clamping jaw 2322. When the rotating assembly 24 drives the support assembly 22 to rotate around the axis of the rotation limiting shaft 2321, the support assembly 22 will generate a circumferential force on the first limiting arms 23214 through the hole walls of the second guide holes 223, that is, the support assembly 22 can directly transmit the driving force of rotation to the rotation limiting shaft 2321, so as to drive the rotation limiting shaft 2321 to rotate synchronously with the support assembly 22. Since the middle part of the second clamping jaw 2322 is connected with the support assembly 22 and the lower end is connected with the rotation limiting shaft 2321 through the connecting rod 2323, when rotating, the support assembly 22 and the connecting rod 2323 simultaneously drive the second clamping jaw 2322 to rotate, so as to avoid generating an additional torsional force on the second clamping jaw 2322, and to ensure the stability and smoothness of the rotation of the second clamping jaw 2322 to drive the pipe body 901.

[0064] In some examples, please refer to Figure 10 and Figure 11The second clamping jaw piece 2322 comprises a second limiting arm 23221 arranged at the middle portion of the second clamping jaw piece 2322, and a second limiting groove 23222 is arranged on the second limiting arm 23221. The support assembly 22 comprises a support block 224 and a guide column 225 fixed to the lower end of the support block 224. The first guide hole 222 and the second guide hole 223 are arranged on the guide column 225, and the first bearing 261 is sleeved on the outer side of the guide column 225. The support block 224 comprises a block body 2241 provided with a second limiting hole 221 and a plurality of third limiting arms 2242 protruding from the circumferential direction of the block body 2241. The third limiting arms 2242 are arranged in one-to-one correspondence with the second clamping jaw piece 2322, are inserted into the second limiting groove 23222, and are rotatably connected to the second limiting arm 23221. When the rotating assembly 24 drives the support assembly 22 to rotate around the rotation limiting shaft 2321, the support assembly 22 can more uniformly and stably transmit the rotating driving force to the second clamping jaw piece 2322, thereby avoiding additional torsional force on the second clamping jaw piece 2322.

[0065] As an embodiment, the clamping portion 23223 is an arc-shaped clamping surface formed on the upper end of the second clamping jaw piece 2322. When the second clamping jaw piece 2322 clamps the pipe body 901, the clamping surface is in close contact with the outer periphery of the pipe body 901, which can maximize the contact area between the second clamping jaw piece 2322 and the pipe body 901, thereby improving the stability of the pipe body 901 clamping to avoid rotation or displacement of the pipe body 901 relative to the second clamping jaw piece 2322, and dispersing the extrusion damage of the clamping force to the outer surface of the pipe body 901.

[0066] As an embodiment, please refer to Figure 11 The cap screwing device 2 further comprises a second mounting plate 252 fixedly arranged below the first mounting plate 251. The clamping driving piece 231 is fixed to the lower end of the second mounting plate 252, and the output shaft 2311 of the clamping driving piece 231 is arranged in a clearance fit state from bottom to top in the second mounting plate 252. The rotation limiting shaft 2321 is coaxially and rotatably connected to the upper end of the output shaft 2311 of the clamping driving piece 231 through the second bearing 262.

[0067] As an embodiment, please refer to Figure 11The twist cap device 2 further comprises a third mounting plate 253, which is fixedly arranged between the first mounting plate 251 and the second mounting plate 252, and the support assembly 22 is rotatably mounted on the third mounting plate 253 through a third bearing 263. The rotating assembly 24 comprises a rotating driving member 241, a power gear 242 fixed on an output shaft of the rotating driving member 241, and a driven gear 243 fixed on the outside of the support assembly 22. The power output by the output shaft of the rotating driving member 241 is transmitted to the driven gear 243 through the power gear 242, thereby driving the support assembly 22 to rotate. As an example, the twist cap device 2 comprises four support assemblies 22, which are arranged in sequence and at intervals. Correspondingly, the rotating assembly 24 comprises four driven gears 243, and further comprises a first transmission gear 245 and three second transmission gears 246. The first transmission gear 245 and the second transmission gears 246 are arranged on the two sides of the support assembly 22. The first transmission gear 245 is engaged between the power gear 242 and the two driven gears 243 in the middle. The second transmission gears 246 are engaged between the adjacent two driven gears 243. The power output by the output shaft of the rotating driving member 241 is transmitted to the two driven gears 243 in the middle through the power gear 242 and the first transmission gear 245, and then the two driven gears 243 in the middle drive the two driven gears 243 on the two sides to rotate through the second transmission gears 246, thereby synchronously rotating the four support assemblies 22. As an example, the rotating driving member 241 is a motor.

[0068] In some embodiments, referring to Figure 3 and Figure 4 The liquid injection device 3 comprises a support seat 31, a swing rod 32, a mounting rod 33, and a first driving assembly 34. The support seat 31 is fixed to the bottom plate 30 and located on one side of the accommodation hole 301. The swing rod 32 is rotatably connected to the support seat 31 through a swing arm shaft 35 arranged between the first end and the second end of the swing rod 32. The mounting rod 33 is fixed to the first end of the swing rod 32 and is used for mounting the liquid injection pipe. The first driving assembly 34 is connected to the second end of the swing rod 32 and is used for driving the swing rod 32 to rotate around the axis of the swing arm shaft 35 to swing the mounting rod 33 to the liquid injection position or the avoiding position. The mounting rod 33 in the liquid injection position is located above the twist cap device 2, and the liquid injection pipe is used for injecting the organic solvent into the pipe body 901 when the mounting rod 33 is in the liquid injection position. The mounting rod 33 in the avoiding position is located on one side of the twist cap device 2, i.e., on one side of the sampling pipe 90.

[0069] In the embodiment, when the mounting rod 33 is in the liquid injection position, the mounting rod 33 is above the first capping device 2a, the liquid injection pipe can be aligned with the corresponding pipe body 901 to complete the injection of the organic solvent, ensuring that the organic solvent accurately enters the pipe body 901 without spilling, effectively avoiding the problems of raw material waste and environmental pollution caused by deviation of the injection position, and ensuring the accuracy of the subsequent pesticide residue detection data. When the mounting rod 33 is in the avoiding position, the mounting rod 33 is located on one side of the first capping device 2a and does not interfere with the movement of the sampling pipe 90 and the capping operation, effectively avoiding the problems of raw material waste and environmental pollution caused by interference, enabling orderly connection between processes, eliminating the need for manual adjustment of the position of the mounting rod 33 to avoid operation conflicts, and improving the overall operation smoothness.

[0070] As an embodiment, please refer to Figure 3 and Figure 4 The mounting rod 33 is perpendicular to the swing rod 32. The mounting rod 33 is provided with mounting holes 331 corresponding to the liquid injection pipes, which can achieve independent and rapid positioning of each liquid injection pipe, ensuring the accurate position of the liquid injection pipe. As an example, the first capping device 2a can hold four sampling pipes 90 at a time, and the mounting rod 33 is provided with four mounting holes 331, that is, the mounting rod 33 can be provided with four liquid injection pipes, and each liquid injection pipe is inserted and fixed in the corresponding mounting hole 331. As an example, the mounting hole 331 can be a threaded hole, and the liquid injection pipe can be provided with an external thread. The liquid injection pipe is inserted into the mounting hole 331 and threadedly connected with the mounting hole 331. Alternatively, the liquid injection pipe is inserted into the mounting hole 331 and welded or bonded to the mounting hole 331.

[0071] As an embodiment, please refer to Figure 3 and Figure 4 The liquid injection device 3 further comprises a liquid injection flow divider 36 fixed to the bottom plate 30. One end of the liquid injection pipe is connected to the liquid injection flow divider 36, and the other end of the liquid injection pipe is inserted into the corresponding mounting hole 331. The liquid injection flow divider 36 can be connected to an external liquid supply source to receive the organic solvent to be injected, thereby uniformly and synchronously distributing the organic solvent from a single liquid supply source to each liquid injection pipe, and then injecting the organic solvent into the pipe body 901 of the sampling pipe 90, thereby simplifying the structure of the liquid injection device 3. As an example, the liquid injection flow divider 36 and the first capping device 2a have a spacing, and the mounting rod 33 in the avoiding position is located between the liquid injection flow divider 36 and the first capping device 2a. It should be noted that the liquid injection flow divider 36 in the present application can be a prior art, which will not be described here.

[0072] As an example, the first drive assembly 34 is a pneumatic cylinder. The cylinder body of the first drive assembly 34 is rotatably connected to the bottom plate 30, and the extended end of the piston rod of the first drive assembly 34 is rotatably connected to the second end of the swing rod 32.

[0073] In some embodiments, the mixing device comprises at least one of the shaking device 4 and the ultrasonic device 5. The shaking device 4 is configured to shake the mixed solution in the sampling tube 90, and the ultrasonic device 5 is configured to ultrasonically treat the mixed solution in the sampling tube 90. As an example, the mixing device comprises the shaking device 4 and the ultrasonic device 5, the shaking device 4 is configured to shake the mixed solution in the sampling tube 90, and the ultrasonic device 5 is configured to ultrasonically treat the mixed solution in the sampling tube 90 after being shaken. Accordingly, the first carrying device 9a is further configured to drive the first grabbing device 1a to move to carry the sampling tube 90 from the first capping device 2a to the shaking device 4, and the first carrying device 9a is further configured to drive the first grabbing device 1a to move to carry the sampling tube 90 from the shaking device 4 to the ultrasonic device 5.

[0074] In the present embodiment, the shaking device 4 can generate stirring of the mixed solution by high-frequency reciprocating motion, quickly break the initial stratification or uneven state of the mixed solution, and make different components achieve dispersion and fusion in a short time. The ultrasonic device 5 can effectively disperse the small agglomerated particles or local concentration uneven areas that may still exist after the shaking treatment by using the cavitation effect generated by the propagation of high-frequency sound waves in the liquid, so that each component of the mixed solution reaches a highly uniform state from the macroscopic to the microscopic level. Compared with single shaking or ultrasonic treatment, the double mixing treatment can not only ensure the mixing efficiency by the shaking device 4, but also improve the mixing precision by the ultrasonic device 5, thereby avoiding the deviation of the subsequent detection results caused by uneven mixing.

[0075] In some embodiments, please refer to Figure 3 and Figure 5 , the shaking device 4 comprises a shaking swing arm 41, a shaking shaft 42, a positioning seat 43, a positioning pressing plate 44, a second driving assembly 45, and a third driving assembly 46. The shaking swing arm 41 has a first end and a second end arranged oppositely. The shaking shaft 42 is connected to the first end of the shaking swing arm 41. The positioning seat 43 is fixed to the second end of the shaking swing arm 41. The positioning pressing plate 44 is rotatably connected to the second end of the shaking swing arm 41. The positioning seat 43 is configured to position the sampling tube 90. The positioning pressing plate 44 has a pressing position and a releasing position arranged oppositely. The second driving assembly 45 is configured to drive the positioning pressing plate 44 to rotate to the pressing position or the releasing position. The positioning pressing plate 44 in the pressing position is configured to press the sampling tube 90 to the positioning seat 43. The positioning pressing plate 44 in the releasing position is configured to release the sampling tube 90, thereby releasing the pressing fixation of the sampling tube 90, so that the sampling tube 90 can be smoothly taken out of or put into the positioning seat 43. The third driving assembly 46 is configured to drive the shaking swing arm 41 to swing around the shaking shaft 42.

[0076] In the embodiment, the positioning seat 43 fixed at the second end of the oscillating swing arm 41 preliminarily positions the sampling tube 90, and the positioning pressing plate 44 is rotatably connected to the second end of the oscillating swing arm 41 and is driven by the second driving assembly 45 to switch between the pressing position and the releasing position, without manually adjusting the angle or position of the positioning pressing plate 44, so that the sampling tube 90 can be quickly pressed and fixed or released. Meanwhile, the preliminary positioning of the positioning seat 43 reduces the positioning time of the sampling tube 90, further shortens the positioning period, and realizes quick positioning and releasing. When in the pressing position, the positioning pressing plate 44 can tightly press the sampling tube 90 against the positioning seat 43, preventing the sampling tube 90 from loosening, falling or being damaged by collision during high-frequency oscillation. When in the releasing position, the positioning pressing plate 44 releases the sampling tube 90, facilitating the taking and placing operation of the sampling tube 90, without manual adjustment, reducing labor intensity and ensuring operation consistency. The third driving assembly 46 drives the oscillating swing arm 41 to swing around the axis of the oscillation shaft 42, which can drive the sampling tube 90 on the positioning seat 43 to synchronously swing back and forth, so as to continuously apply force to the mixed liquid, ensuring that the sample to be detected and the organic solvent are fully mixed, and improving the mixing efficiency and effect.

[0077] As an embodiment, the oscillation device 4 further comprises two bases 471 which are spaced apart and fixed in opposite positions, for example, the two bases 471 are respectively fixed on the bottom plate 30. The two ends of the oscillation shaft 42 are rotatably connected to the two bases 471, and the two bases 471 can provide stable and symmetrical support for the oscillation shaft 42, ensuring that the oscillating swing arm 41 swings around the oscillation shaft 42 without deviation and more stably.

[0078] As an embodiment, please refer to Figure 3 and Figure 5 The oscillation device 4 comprises two symmetrical oscillating swing arms 41, the first ends of the two oscillating swing arms 41 are respectively connected to the oscillation shaft 42, the second ends of the two oscillating swing arms 41 are respectively fixed to the two ends of the positioning seat 43, and the positioning pressing plate 44 is rotatably connected between the second ends of the two oscillating swing arms 41. The embodiment can enhance the stability of the positioning seat 43 and the force balance during oscillation, and ensure that the pressing effect of the positioning pressing plate 44 on the sampling tube 90 is more reliable.

[0079] As an embodiment, please refer to Figure 3 and Figure 5The positioning seat 43 comprises a fixing plate 431 fixed to the second end of the oscillating swing arm 41, and a first positioning plate 432 and a second positioning plate 433 fixed to the fixing plate 431 respectively, wherein the first positioning plate 432 is located above the second positioning plate 433. The first positioning plate 432 defines a first positioning hole 4321, and the second positioning plate 433 defines a second positioning hole 4331, which is arranged one-to-one corresponding to the first positioning hole 4321 and coaxially arranged with the corresponding first positioning hole 4321. The cylindrical barrel portion 9012 of the tube body 901 is arranged through the first positioning hole 4321, and the conical barrel portion 9013 is supported in the second positioning hole 4331, the diameter of the second positioning hole 4331 is greater than the lower end diameter of the conical barrel portion 9013 and less than the upper end diameter of the conical barrel portion 9013. In this embodiment, the first positioning plate 432 and the second positioning plate 433 cooperate to achieve double positioning of the sampling tube 90 up and down, ensuring that the sampling tube 90 is stable and does not deviate during oscillation.

[0080] As an example, the first positioning plate 432 defines a plurality of first positioning holes 4321, and the second positioning plate 433 defines a plurality of second positioning holes 4331. For example, the first positioning plate 432 defines 4 first positioning holes 4321, and the second positioning plate 433 defines 4 second positioning holes 4331. That is, the oscillation device 4 can be used to simultaneously oscillate 4 sampling tubes 90.

[0081] As an embodiment, please refer to Figure 3 and Figure 5The positioning pressing plate 44 comprises a connecting arm 442, a pressing plate body 443 and two pressing arms 441 which are symmetrically and spaced apart, the pressing arm 441 comprises a first arm segment 4411 and a second arm segment 4412 which is bent and extended from one end of the first arm segment 4411, the first arm segment 4411 is rotatably connected to the oscillating swing arm 41 away from one end of the second arm segment 4412, the second arm segment 4412 is fixed to the pressing plate body 443 away from one end of the first arm segment 4411, and the connecting arm 442 is connected to the middle part of the first arm segment 4411 of the two pressing arms 441. The second driving assembly 45 is a pneumatic cylinder, the cylinder body of the second driving assembly 45 is connected between the two oscillating swing arms 41, and the extending end of the piston rod of the second driving assembly 45 is rotatably connected to the connecting arm 442. As an example, the pressing plate body 443 has a pressing surface for pressing the sampling tube 90, the pressing plate body 443 of the positioning pressing plate 44 in the pressing position is horizontally placed, the pressing surface of the pressing plate body 443 in the pressing position faces downward, that is, the lower surface of the pressing plate body 443 in the pressing position is the pressing surface of the pressing plate body 443, and the pressing surface of the pressing plate body 443 in the pressing position is pressed on the upper end surface of the cover body 902 of the sampling tube 90. The pressing plate body 443 of the positioning pressing plate 44 in the releasing position is vertically placed, the pressing surface of the pressing plate body 443 is located on a vertical surface, and no longer located on the path of the sampling tube 90 inserted into the positioning seat 43 and pulled out of the positioning seat 43. The positioning pressing plate 44 in the pressing position can be rotated upward by 90° to reach the releasing position, and the positioning pressing plate in the releasing position can be rotated downward by 90° to reach the pressing position.

[0082] In the embodiment, the positioning pressing plate 44 comprises two symmetrically and spaced apart pressing arms 441, each of which comprises a bent first arm segment 4411 and a second arm segment 4412, and the middle part of the first arm segment 4411 of the two pressing arms 441 is connected by the connecting arm 442, which not only makes the installation of the pressing plate body 443 more stable, but also uniformly distributes the force when pressing the sampling tube 90, avoiding local excessive pressure causing damage to the tube body 901. At the same time, the first arm segment 4411 of the pressing arm 441 is rotatably connected to the oscillating swing arm 41, which provides a rotating fulcrum for the positioning pressing plate 44 to switch the pressing position or the releasing position, ensuring smooth switching process without jamming. The cylinder body of the second driving assembly 45 is connected between the two oscillating swing arms 41, and the extending end of the piston rod of the second driving assembly 45 is rotatably connected to the connecting arm 442, which can drive the two pressing arms 441 to move synchronously by pushing and pulling the connecting arm 442, further improving the structural stability of the positioning pressing plate 44, and the symmetric driving force makes the pressing plate body 443 balanced, effectively improving the reliability of the sampling tube 90 pressing, and avoiding the loosening of the sampling tube 90 during the oscillation process.

[0083] As an example, the oscillation device 4 also includes a mounting arm 48 connected between the two oscillation arms 41, and the cylinder of the second drive assembly 45 is rotatably connected to the mounting arm 48.

[0084] As one implementation method, please refer to Figure 3 and Figure 5 The third drive assembly 46 includes an eccentric shaft 461, an eccentric wheel 462, and a third drive member 463. The axis of the eccentric wheel 462 is fixed relative to the axis of the oscillating shaft 42. The third drive member 463 is used to drive the eccentric wheel 462 to rotate around the axis of the eccentric wheel 462. The eccentric shaft 461 is fixed to the eccentric wheel 462 and is eccentrically set relative to the eccentric wheel 462. An elongated hole 411 is provided on the oscillating arm 41, and the eccentric shaft 461 passes through the elongated hole 411. When the third driving component 463 drives the eccentric wheel 462 to rotate, the eccentric shaft 461 moves in a circular motion around the axis of the eccentric wheel 462. Since the eccentric shaft 461 passes through the elongated hole 411 of the oscillating arm 41, and the oscillating arm 41 can only swing around the oscillating shaft 42 (it cannot make a complete circular motion with the eccentric shaft 461), the circular motion of the eccentric shaft 461 will be converted into a reciprocating thrust on the oscillating arm 41 through the elongated hole 411, thereby driving the oscillating arm 41 to continuously reciprocate around the oscillating shaft 42, and finally completing the oscillation treatment of the mixture in the sampling tube 90.

[0085] As one implementation method, please refer to Figure 3 and Figure 3The third driving assembly 46 includes two eccentric wheels 462 coaxially arranged, symmetrically fixed to the two ends of the eccentric shaft 461, and coaxially fixed to the corresponding rotation reference shaft 49 respectively, and the two rotation reference shafts 49 are rotatably connected to the two bases 471 through the corresponding fourth bearings respectively. In the embodiment, the two eccentric wheels 462 are symmetrically distributed at the two ends of the eccentric shaft 461, which can uniformly disperse the force generated by the eccentric shaft 461 during movement to both sides, avoid deformation or deviation of the eccentric shaft 461 due to excessive force on one side, and further ensure that the eccentric shaft 461 always maintains a stable movement trajectory. The two rotation reference shafts 49 are connected to the base 471 through the sixth bearing respectively, which can not only reduce the friction resistance during rotation, make the rotation of the eccentric wheel 462 more smooth, but also limit the radial displacement of the eccentric wheel 462 by means of the fixing action of the base 471, prevent it from shaking during rotation, thereby driving the oscillating swing arm 41 to swing smoothly around the oscillating shaft 42, avoiding the influence of swing deviation on the oscillation effect of the mixed liquid in the sampling tube 90. Moreover, only one third driving member 463 drives one of the eccentric wheels 462 to drive the eccentric shaft 461 and the other eccentric wheel 462 to rotate synchronously, which simplifies the driving structure and reduces the error that may occur during the cooperative work of multiple driving members, further improves the reliability of the overall operation of the third driving assembly 46, and provides support for the long-term stable operation of the oscillation device 4.

[0086] By way of example, reference will be made to Figure 5 The third driving member 463 includes a first synchronous pulley, a second synchronous pulley 4632, a synchronous belt 4631, and a driving motor. The synchronous belt 4631 is in transmission connection with the first synchronous pulley and the second synchronous pulley 4632 respectively, and the driving motor is fixed to the bottom plate 30 (for example, fixed to the lower end of the bottom plate 30). The first synchronous pulley is arranged on the output end of the motor, and the second synchronous pulley 4632 is coaxially fixed to one of the rotation reference shafts 49. In the embodiment, the first synchronous pulley is arranged on the output end of the driving motor of the third driving member 463, which is in transmission with the second synchronous pulley 4632 coaxially fixed to the rotation reference shaft 49, can stably transmit power to drive the eccentric wheel 462 to rotate, and has high transmission precision and low noise.

[0087] As an embodiment, reference will be made to Figure 12 and Figure 12The oscillation device 4 further comprises a reinforcing plate 472 fixed between the two bases 471, and the reinforcing plate 472 can enhance the structural stability of the two bases 471, and further enhance the overall structural stability of the oscillation device 4. As an example, the oscillation device 4 further comprises a buffer plate 473 fixed on the reinforcing plate 472, and the buffer plate 473 is arranged corresponding to the oscillation swing arm 41. In some examples, the buffer plate 473 can be a rubber plate. When the oscillation swing arm 41 swings to the limit position or generates a larger impact due to sudden vibration, the buffer plate 473 can absorb the impact energy through the elastic deformation of its own material, avoiding the direct collision between the oscillation swing arm 41 and the reinforcing plate 472 to cause wear and tear, and prolonging the service life of the oscillation swing arm 41. At the same time, the elastic material such as rubber can also effectively weaken the noise generated by the collision, and reduce the noise pollution when the oscillation device 4 is running.

[0088] In some embodiments, referring to Figure 12 The centrifugal device 6 comprises an inlet 302, an outlet 303, a centrifuge 61, two temporary storage mechanisms 62, and two material taking mechanisms 63. The inlet 302 and the outlet 303 are arranged on the bottom plate 30 and are spaced apart. The centrifuge 61 is arranged below the bottom plate 30, and the centrifuge 61 is located between the inlet 302 and the outlet 303. The centrifuge 61 is used for centrifugal processing of the mixed liquid contained in the sampling tube 90. The two temporary storage mechanisms 62 are an inlet temporary storage mechanism 62a and an outlet temporary storage mechanism 62b. The inlet temporary storage mechanism 62a and the outlet temporary storage mechanism 62b are arranged on the bottom plate 30. The inlet temporary storage mechanism 62a is arranged on one side of the inlet 302, and the outlet temporary storage mechanism 62b is arranged on one side of the outlet 303. The two material taking mechanisms 63 are an inlet material taking mechanism 63a and an outlet material taking mechanism 63b. The inlet material taking mechanism 63a and the outlet material taking mechanism 63b are arranged on the bottom plate 30. The inlet material taking mechanism 63a is arranged at the inlet 302, and the outlet material taking mechanism 63b is arranged at the outlet 303. The inlet temporary storage mechanism 62a is used for storing the sampling tube 90 carried by the grabbing device 1 to the centrifugal device 6. The inlet temporary storage mechanism 62a is also used for moving the sampling tube 90 to above the inlet 302 in the horizontal direction. The inlet material taking mechanism 63a is used for placing the sampling tube 90 moved to above the inlet 302 in the centrifuge 61 in the vertical direction. The outlet material taking mechanism 63b is used for moving the sampling tube 90 in the centrifuge 61 to above the outlet 303 in the vertical direction. The outlet temporary storage mechanism 62b is also used for receiving the sampling tube 90 moved to above the outlet 303 by the outlet material taking mechanism 63b and storing the sampling tube 90. The second carrying device 9b is used for driving the second grabbing device 1b to move to carry the sampling tube 90 from the outlet temporary storage mechanism 62b to the second capping device 2b.

[0089] In the present embodiment, the number of sample tubes 90 placed by the grabbing device 1 at one time (4 in the present embodiment) is different from the number of sample tubes 90 loaded into the centrifuge 61 at one time (2 in the present embodiment), so the grabbing device 1 cannot be directly used for loading and unloading the centrifuge 61. The input temporary storage mechanism 62a can first receive the sample tubes 90 carried by the first grabbing device 1a and temporarily store them, then move the sample tubes 90 to the input port 302 in batches according to the number of sample tubes 90 loaded into the centrifuge 61 at one time, and then send the sample tubes 90 into the centrifuge 61 by the input and output mechanism 63a, so as to avoid loading confusion caused by the number mismatch. Similarly, after centrifugation is completed, the number of sample tubes 90 unloaded from the centrifuge 61 at one time (2 in the present embodiment) is different from the number of sample tubes 90 carried by the subsequent second grabbing device 1b at one time (4 in the present embodiment), at this time, the output temporary storage mechanism 62b can first receive all the sample tubes 90 taken out from the centrifuge 61 in batches by the output and input mechanism 63b, and then the second grabbing device 1b can take them away as needed, so as to avoid the centrifuge 61 waiting or the subsequent process stagnating caused by the number mismatch. In addition, the input port 302 and the output port 303 penetrate the bottom plate 30, the centrifuge 61 is located below the bottom plate 30 and between the input port 302 and the output port 303, and each component is close to the layout, without the need for long-distance conveying structure, which reduces the floor area of the centrifugal device 6 and makes the layout more compact. The two input and output mechanisms 63 ensure the stable transfer of the sample tubes 90 between the temporary storage mechanism 62 and the centrifuge 61, and cooperate with the first grabbing device 1a and the second grabbing device 1b to form effective connection of the previous feeding, number adjustment, centrifugal processing, number adaptation, and subsequent transfer, which not only improves the centrifugal efficiency, but also solves the process breakpoint problem caused by the number mismatch. Moreover, the input and output mechanism 63 only moves the sample tubes 90 vertically, which can avoid the trajectory deviation and collision risk caused by horizontal movement, and the temporary storage mechanism 62 only moves the sample tubes 90 horizontally, which can accurately complete batch transfer and number distribution, the two actions are single and clear in division, which not only improves the stability and precision of the sample tube 90 transfer, but also simplifies the device control logic, and ensures the efficient connection of the centrifugal device 6 and the previous and subsequent devices.

[0090] As an embodiment, please refer to Figure 13 , the input port 302 and the output port 303 are located on the two sides of the centrifuge 61 opposite to each other, the input and output mechanism 63a and the output and input mechanism 63b are located above the centrifuge 61 and between the input port 302 and the output port 303, the input temporary storage mechanism 62a is located on the side away from the centrifuge 61 of the input port 302, and the output temporary storage mechanism 62b is located on the side away from the centrifuge 61 of the output port 303.

[0091] In some embodiments, please refer to Figures 16 to 18 , Figure 18 and Figure 18The taking mechanism 63 comprises a taking member 631 which is movable up and down and holds the sample tube 90, the taking member 631 of the taking mechanism 63a corresponding to the inlet 302 in the vertical direction, and the taking member 631 of the taking mechanism 63b corresponding to the outlet 303 in the vertical direction. The temporary storage mechanism 62 comprises a fixed clamping assembly 621, a movable clamping assembly 622 and a translation driving assembly 623, the fixed clamping assembly 621 being used for holding or releasing the sample tube 90, the fixed clamping assembly 621 being fixed on the bottom plate 30, the movable clamping assembly 622 being used for holding or releasing the sample tube 90, the movable clamping assembly 622 being connected to the upper side of the fixed clamping assembly 621 in a translation manner. The translation driving assembly 623 drives the movable clamping assembly 622 to move to a first position or a second position relative to the fixed clamping assembly 621 in a horizontal direction, the movable clamping assembly 622 in the first position being located directly above the fixed clamping assembly 621. In the inlet temporary storage mechanism 62a, the sample tube 90 held by the movable clamping assembly 622 in the second position is located between the inlet 302 and the taking member 631 of the taking mechanism 63a, and the taking member 631 of the taking mechanism 63a is used for placing the sample tube 90 between the inlet 302 and the taking member 631 into the centrifuge 61 through the inlet 302. In the outlet temporary storage mechanism 62b, the movable clamping assembly 622 in the second position is partially located between the outlet 303 and the taking member 631 of the taking mechanism 63b, and the taking member 631 of the taking mechanism 63b is used for grabbing the sample tube 90 below the outlet 303 in the centrifuge 61 and placing the sample tube 90 on the movable clamping assembly 622 in the second position.

[0092] When loading, in the initial state, the movable clamping assembly 622 of the temporary storage mechanism 62a is in the first position, and both the movable clamping assembly 622 of the temporary storage mechanism 62a and the fixed clamping assembly 621 of the temporary storage mechanism 62b are in the released state, and the taking member 631 of the taking mechanism 63a is in the first height position. After the first grabbing device 1a places the sample tubes 90 on the temporary storage mechanism 62a, the movable clamping assembly 622 in the first position is switched to the clamped state to hold all the sample tubes 90 placed by the first grabbing device 1a, at which time the fixed clamping assembly 621 is still in the released state (i.e., does not hold the sample tubes 90). Then the translation driving assembly 623 drives the movable clamping assembly 622 holding the sample tubes 90 to translate towards the inlet 302 to the second position, when the movable clamping assembly 622 is in the second position, part of the sample tubes 90 are just located between the inlet 302 and the taking member 631 of the taking mechanism 63a, the taking member 631 is lowered to the second height position and grabs the sample tubes 90 located between the inlet 302 and the taking member 631 of the taking mechanism 63a, the fixed clamping assembly 621 holds the remaining sample tubes 90 except the sample tubes 90 grabbed by the taking member 631, and then the movable clamping assembly 622 releases (i.e., loosens) all the sample tubes 90. After the movable clamping assembly 622 loosens the sample tubes 90, the taking member 631 holding the sample tubes 90 rises back to the first height position, when the taking member 631 is in the first height position, the sample tubes 90 have a certain distance from the movable clamping assembly 622 in the vertical direction, and then the translation driving assembly 623 drives the movable clamping assembly 622 to retreat to the first position. After the movable clamping assembly 622 retreats to the first position (at which time the movable clamping assembly 622 is in the released state, i.e., the movable clamping assembly 622 does not interfere with the sample tubes 90), the taking member 631 is lowered again to place the sample tubes 90 through the inlet 302 onto the centrifuge 61. After the taking member 631 places the sample tubes 90 onto the centrifuge 61, the movable clamping assembly 622 in the first position clamps (i.e., holds) the sample tubes 90 held by the fixed clamping assembly 621, after the movable clamping assembly 622 clamps the sample tubes 90, the fixed clamping assembly 621 releases all the sample tubes 90, and then the translation driving assembly 623 drives the movable clamping assembly 622 holding the sample tubes 90 to translate towards the inlet 302 to the second position, for the next loading, and so on, until all the sample tubes 90 temporarily stored in the temporary storage mechanism 62a are placed into the centrifuge 61.

[0093] When discharging, in the initial state, the movable clamping assembly 622 of the discharging temporary storage mechanism 62b is in the first position, and both the movable clamping assembly 622 of the discharging temporary storage mechanism 62b and the fixed clamping assembly 621 of the discharging temporary storage mechanism 62b are in the released state, and the taking member 631 of the discharging taking mechanism 63b is in the first height position. After the centrifugal machine 61 stops working, the taking member 631 of the discharging taking mechanism 63b moves downward and grabs the sampling tube 90 in the centrifugal machine 61 below the discharging port 303. After grabbing the sampling tube 90, the taking member 631 of the discharging mechanism rises to the first height position with the sampling tube 90, and then the translation driving assembly 623 drives the movable clamping assembly 622 to move to the second position. After the movable clamping assembly 622 moves to the second position, the taking member 631 moves to the second height position downward, and the movable clamping assembly 622 switches to the clamped state to hold the sampling tube 90 grabbed by the taking member 631. After the movable clamping assembly 622 holds the sampling tube 90, the taking member 631 releases (i.e., releases) the sampling tube 90 and moves upward to the first height position, and then the translation driving assembly 623 drives the movable clamping assembly 622 holding the sampling tube 90 to move to the first position. After the movable clamping assembly 622 moves to the first position, the fixed clamping assembly 621 switches to the clamped state to clamp the sampling tube 90 held by the movable clamping assembly 622, and then the movable clamping assembly 622 switches to the released state to release the sampling tube 90. After the movable clamping assembly 622 moves to the first position, the taking member 631 again moves downward and grabs the sampling tube 90 in the centrifugal machine 61 below the discharging port 303. After grabbing the sampling tube 90, the taking member 631 of the discharging mechanism rises to the first height position with the sampling tube 90. After the movable clamping assembly 622 switches to the released state to release the sampling tube 90 and the taking member 631 is in the first height position, the translation driving assembly 623 drives the movable clamping assembly 622 in the released state to move to the second position. After the movable clamping assembly 622 moves to the second position, the taking member 631 moves to the second height position downward, and the movable clamping assembly 622 switches to the clamped state to hold the sampling tube 90 grabbed by the taking member 631 and the sampling tube 90 held by the fixed clamping assembly 621. After the movable clamping assembly 622 holds the sampling tube 90, the taking member 631 releases (i.e., releases) the sampling tube 90 and moves upward to the first height position, and the fixed clamping assembly 621 switches to the released state to release the sampling tube 90. Then the translation driving assembly 623 drives the movable clamping assembly 622 holding the sampling tube 90 to move to the first position. After the movable clamping assembly 622 moves to the first position, the fixed clamping assembly 621 switches to the clamped state to clamp all the sampling tubes 90 held by the movable clamping assembly 622, and then the movable clamping assembly 622 switches to the released state to release the sampling tubes 90, and the cycle continues until all the sampling tubes 90 in the centrifugal machine 61 are placed on the discharging temporary storage mechanism 62b.Then the second grabbing device 1b grabs the sample tube 90 on the outfeed temporary storage mechanism 62b and moves the sample tube 90 to the second capping device 2b.

[0094] In the present embodiment, the taking member 631 of the taking mechanism 63 is movable up and down and can hold the sample tube 90, and the infeed taking member 631 and the infeed port 302 and the outfeed taking member 631 and the outfeed port 303 are respectively arranged in vertical correspondence, so that the taking member 631 can directly complete the grabbing and lifting of the sample tube 90 along the vertical direction, avoiding the large floor space caused by the horizontal movement of the taking member 631 and the collision or falling of the sample tube 90. When infeeding, the sample tube 90 can be accurately sent into the centrifuge 61 through the infeed port 302, and when outfeeding, the sample tube 90 corresponding to the outfeed port 303 in the centrifuge 61 can be stably grabbed, improving the taking efficiency and safety. In the infeed temporary storage mechanism 62a, the movable clamping assembly 622 in the second position can batch send the sample tubes 90 between the infeed port 302 and the infeed taking member 631, directly interface the taking action of the taking member 631, and avoid the additional adjustment of the horizontal position of the taking member 631. In the outfeed temporary storage mechanism 62b, the movable clamping assembly 622 in the second position can accurately interface the outfeed port 303 and the outfeed taking member 631, so that the taking member 631 can batch place the sample tubes 90 in the centrifuge 61 thereon without additional transfer, effectively reducing the damage risk of the sample tubes 90, and further improving the overall operation reliability and efficiency of the centrifugal device 6.

[0095] In some embodiments, please refer to Figure 13The fixed clamping assembly 621 comprises a bottom lining plate 6211, a cushion plate 6212, a first fixed clamping plate 6213, a first movable clamping plate 6214 and a first clamping driving member 6215. The cushion plate 6212 and the first fixed clamping plate 6213 are fixedly arranged at the upper end of the bottom lining plate 6211. The first clamping driving member 6215 is fixed to the cushion plate 6212. The first movable clamping plate 6214 is fixed to the output end of the first clamping driving member 6215. The first clamping driving member 6215 is configured to drive the first movable clamping plate 6214 to move towards or away from the first fixed clamping plate 6213, so as to hold or release the sampling tube 90. The movable clamping assembly 622 is arranged at the upper end of the fixed clamping assembly 621. The movable clamping assembly 622 comprises a pushing plate 6221, a second fixed clamping plate 6222, a second movable clamping plate 6223 and a second clamping driving member 6224. The pushing plate 6221 is slidably connected to the cushion plate 6212 in a direction towards or away from the corresponding sampling mechanism 63. The second fixed clamping plate 6222 is arranged above the first fixed clamping plate 6213 and is fixedly connected to the pushing plate 6221. The second clamping driving member 6224 is fixed to the pushing plate 6221. The second movable clamping plate 6223 is fixed to the output end of the second clamping driving member 6224. The second clamping driving member 6224 is configured to drive the second movable clamping plate 6223 to move towards or away from the second fixed clamping plate 6222, so as to hold or release the sampling tube 90. The output end of the translation driving assembly 623 is fixed to the second fixed clamping plate 6222. As an example, when the sampling tube 90 is held on the temporary storage mechanism 62, the bottom lining plate 6211 can be used to support the sampling tube 90, or the sampling tube 90 and the bottom lining plate 6211 can also have a gap in the vertical direction. The actual arrangement can be set according to the actual situation, which is not limited here.

[0096] In some embodiments, the number of the grabbing assemblies 11 of the first grabbing device 1a is N (N≥1), and the number of the grabbing assemblies 11 of the second grabbing device 1b is N, that is, the first grabbing device 1a can grab N sampling tubes 90 at a time, and the second grabbing device 1b can grab N sampling tubes 90 at a time. The centrifuge 61 comprises a rotating disc 612 rotatable about its own axis and N receiving seats 613 arranged circumferentially on the rotating disc 612, the N receiving seats 613 are uniformly and circumferentially arranged on the rotating disc 612, and each receiving seat 613 can be used for receiving two sampling tubes 90. Each taking mechanism 63 comprises two taking members 631, each of which is used for grabbing one sampling tube 90 at a time, and the two sampling tubes 90 grabbed by each taking mechanism 63 at a time are placed in the same receiving seat 613. Each fixed clamping assembly 621 comprises two pads 6212, two first movable clamping plates 6214 (first movable clamping plate 6214a and first movable clamping plate 6214b, respectively) and two first clamping driving members 6215 (first clamping driving member 6215a and first clamping driving member 6215b, respectively), the first clamping driving members 6215 are arranged in one-to-one correspondence with the pads 6212, the first movable clamping plates 6214 are arranged in one-to-one correspondence with the first clamping driving members 6215, the two pads 6212 are symmetrically fixed to the two sides of the first fixed clamping plate 6213, the first clamping driving members 6215 are fixed to the sides of the corresponding pads 6212 away from the other pads 6212, and the first movable clamping plates 6214 are fixed to the output ends of the corresponding first clamping driving members 6215. Each first movable clamping plate 6214 is provided with N first clamping grooves 62141 uniformly arranged on the side facing the first fixed clamping plate 6213, and the surface of the first fixed clamping plate 6213 facing the first movable clamping plate 6214 is a vertically arranged plane. The movable clamping assembly 622 comprises two push plates 6221, two second movable clamping plates 6223 (second movable clamping plate 6223a and second movable clamping plate 6223b, respectively) and two second clamping driving members 6224 (second clamping driving member 6224a and second clamping driving member 6224b, respectively), the push plates 6221 are arranged in one-to-one correspondence with the pads 6212, the two push plates 6221 are symmetrically fixed to the two sides of the second fixed clamping plate 6222, the second clamping driving members 6224 are arranged in one-to-one correspondence with the push plates 6221, the second movable clamping plates 6223 are arranged in one-to-one correspondence with the second clamping driving members 6224, the second clamping driving members 6224 are fixed to the sides of the corresponding push plates 6221 away from the other push plates 6221, and the second movable clamping plates 6223 are fixed to the output ends of the corresponding second clamping driving members 6224.Each second movable clamping plate 6223 is provided with N second clamping grooves 62231 on the side facing the second fixed clamping plate 6222, and the surface of the second fixed clamping plate 6222 facing the second movable clamping plate 6223 is a vertical plane. When the fixed clamping assembly 621 holds the sampling tube 90, the sampling tube 90 is held between the first clamping groove 62141 and the first fixed clamping plate 6213. When the movable clamping assembly 622 holds the sampling tube 90, the sampling tube 90 is held between the second clamping groove 62231 and the second fixed clamping plate 6222. When the movable clamping assembly 622 is in the first position, the second clamping groove 62231 is arranged one by one corresponding to the first clamping groove 62141, and the second clamping groove 62231 is located above the first clamping groove 62141. When the movable clamping assembly 622 is in the second position, one of the second clamping grooves 62231 (the second clamping groove 62231 closest to the inlet port 302 or the outlet port 303 when the movable clamping assembly 622 is in the first position) is located above the inlet port 302 or the outlet port 303, and the remaining second clamping grooves 62231 are located above the corresponding first clamping grooves 62141. There is no second clamping groove 62231 above the first clamping groove 62141 farthest from the inlet port 302 or the outlet port 303.

[0097] As an example, the number of grabbing assemblies 11 of the first grabbing device 1a is 4, and the number of grabbing assemblies 11 of the second grabbing device 1b is 4. Each first movable clamping plate 6214 is provided with 4 first clamping grooves 62141 on the side facing the first fixed clamping plate 6213, and the 4 first clamping grooves 62141 are sequentially first clamping groove 62141a, first clamping groove 62141b, first clamping groove 62141c and first clamping groove 62141d in the direction away from the inlet port 302 or the outlet port 303. Each second movable clamping plate 6223 is provided with 4 second clamping grooves 62231 on the side facing the second fixed clamping plate 6222, and the 4 second clamping grooves 62231 are sequentially second clamping groove 62231a, second clamping groove 62231b, second clamping groove 62231c and second clamping groove 62231d in the direction away from the inlet port 302 or the outlet port 303. Please refer to Figure 17When the movable clamping assembly 622 is in the first position, the second clamping groove 62231a is located directly above the first clamping groove 62141a, the second clamping groove 62231b is located directly above the first clamping groove 62141b, the second clamping groove 62231c is located directly above the first clamping groove 62141c, and the second clamping groove 62231d is located directly above the first clamping groove 62141d. When the movable clamping assembly 622 is in the second position, the second clamping groove 62231a is located directly above the inlet opening 302 or the outlet opening 303, the second clamping groove 62231b is located directly above the first clamping groove 62141a, the second clamping groove 62231c is located directly above the first clamping groove 62141b, and the second clamping groove 62231d is located directly above the first clamping groove 62141c.

[0098] In some embodiments, referring to Figure 17 and Figure 13 ( Figure 17 The centrifugal device 6 further comprises a lifting driving mechanism 64 having an output end movable in the vertical direction, and the inlet and outlet taking mechanisms 63a and 63b are symmetrically fixed to the output end of the lifting driving mechanism 64. As an example, the lifting driving mechanism 64 is arranged on the bottom plate 30 and located between the inlet opening 302 and the outlet opening 303.

[0099] As an embodiment, referring to Figure 17 and Figure 13 The lifting driving mechanism 64 comprises a lifting driving member 641, a lead screw 642, a lead screw nut 643, a lifting beam 644, and two mounting plates 645. The lifting driving member 641 is fixed above the bottom plate 30, the lead screw 642 is arranged vertically and fixed to the output end of the lifting driving member 641, the lead screw nut 643 is drivingly connected to the outside of the lead screw 642, the two mounting plates 645 are fixed to the bottom plate 30 and symmetrically arranged on both sides of the lead screw 642, the mounting plate 645 is provided with a lifting limiting hole 6451 extending in the vertical direction, the lifting beam 644 is fixed to the lead screw nut 643 as the output end of the lifting driving mechanism 64, and the two ends of the lifting beam 644 respectively pass through the lifting limiting holes 6451 of the two mounting plates 645. The inlet and outlet taking mechanisms 63a and 63b are fixed to one end and the other end of the lifting beam 644 respectively. The lifting driving member 641 is used to drive the lead screw 642 to rotate so as to make the lifting beam 644 move up and down. In this embodiment, the lifting driving mechanism 64 can stably drive the inlet and outlet taking mechanisms 63a and 63b to move up and down synchronously, which not only has a compact structure, but also reduces the cost. As an example, the lifting driving member 641 is a motor.

[0100] As an embodiment, referring to Figure 17The lifting driving mechanism 64 further comprises guide rods 646, two of which are fixed on each mounting plate 645 and symmetrically arranged at two sides of the lifting beam 644, and the taking mechanism 63 further comprises a mounting base 632 fixed on the lifting beam 644 and in sliding connection with the two guide rods 646 respectively. The taking member 631 is fixed on the lower end of the mounting base 632.

[0101] As an implementation form, the taking member 631 is a suction disc connected with a vacuumizing device, that is, the taking member 631 can grasp the sampling tube 90 in a suction manner. For example, the taking member 631 can suck the cover 902 of the sampling tube 90.

[0102] As an implementation form, please refer to Figure 13 and Figure 17 The centrifuge 61 further comprises a rotating shaft 614 and a bracket 615, the bracket 615 is fixed on the lower end of the bottom plate 30 at intervals, the rotating shaft 614 is rotatably installed on the bottom plate 30 through a fourth bearing 617, the rotating shaft 614 is rotatably installed on the bracket 615 through a fifth bearing 618, the rotating disc 612 is fixed on the rotating shaft 614, and the centrifuge 61 further comprises a rotating driving member 616, which drives the rotating shaft 614 to rotate so as to drive the rotating disc 612 fixed on the rotating shaft 614 to rotate.

[0103] As an implementation form, please refer to Figure 7 and Figure 20 The receiving seat 613 comprises a fixed ring 6131 rotatably connected at two ends to the rotating disc 612 and a bottom bracket 6132 fixed on the lower end of the fixed ring 6131 through a mounting member 6133, the fixed ring 6131 is provided with a first receiving hole, the cylindrical barrel portion 9012 of the tube body 901 is arranged in the first receiving hole, the bottom bracket 6132 is provided with a second receiving hole coaxially arranged with the first receiving hole, the diameter of the second receiving hole is greater than the lower end diameter of the tapered barrel portion 9013 and smaller than the upper end diameter of the tapered barrel portion 9013, and the tapered barrel portion 9013 is supported in the second receiving hole.

[0104] As an example, the working principle of the centrifugal device 6 is as follows: in the initial state, the movable clamping assembly 622 of the temporary feeding mechanism 62a is in the first position, and the first grabbing device 1a first places four sampling tubes 90a between the four first clamping grooves 62141 of the first movable clamping plate 6214a and the first fixed clamping plate 6213, and between the four second clamping grooves 62231 of the second movable clamping plate 6223a and the second fixed clamping plate 6222. Then the second movable clamping plate 6223a moves towards the second fixed clamping plate 6222 under the drive of the second clamping drive 6224a, and the four sampling tubes 90a (in the direction away from the feeding port 302, the four sampling tubes 90a are sampling tube 90c, sampling tube 90d, sampling tube 90e, and sampling tube 90f in turn) are clamped by the cooperation of the second clamping grooves 62231 of the second movable clamping plate 6223a and the second fixed clamping plate 6222, and the first movable clamping plate 6214a remains in the released state. Then the first grabbing device 1a performs the second feeding, and places another four sampling tubes 90b between the four first clamping grooves 62141 of the first movable clamping plate 6214b and the first fixed clamping plate 6213, and between the four second clamping grooves 62231 of the second movable clamping plate 6223b and the second fixed clamping plate 6222. Then the second movable clamping plate 6223b moves towards the second fixed clamping plate 6222 under the drive of the corresponding second clamping drive 6224b, and the four sampling tubes 90b (in the direction away from the feeding port 302, the four sampling tubes 90b are sampling tube 90c, sampling tube 90d, sampling tube 90e, and sampling tube 90f in turn) are clamped by the cooperation of the second clamping grooves 62231 of the second movable clamping plate 6223b and the second fixed clamping plate 6222, and the first movable clamping plate 6214b remains in the released state. At this time, the first grabbing device 1a completes the placement of eight sampling tubes 90 in two times, and the two second movable clamping plates 6223 of the movable clamping assembly 622 clamp four sampling tubes 90 respectively. Then the translation drive assembly 623 drives the entire movable clamping assembly 622 to translate towards the feeding port 302 until the movable clamping assembly 622 reaches the second position. When the movable clamping assembly 622 is in the second position, the sampling tube 90c clamped by the second clamping groove 62231a of the second movable clamping plate 6223a and the sampling tube 90c clamped by the second clamping groove 62231a of the second movable clamping plate 6223b are located directly above the feeding port 302 and directly below the two taking members 631 of the feeding and taking mechanism 63a. At this time, the lifting drive 641 drives the feeding and taking member 631 to descend to the second height position, and the two taking members 631 respectively adsorb the cover 902 of the sampling tube 90c to grab the two sampling tubes 90c.When the sampling tube 90c is grabbed by the taking component 631, the first clamping driving element 6215a drives the first movable clamping plate 6214a to move towards the first fixed clamping plate 6213, and the first clamping slot 62141 of the first movable clamping plate 6214a cooperates with the first fixed clamping plate 6213 to hold the remaining three sampling tubes 90a (except the sampling tube 90c) on the second movable clamping plate 6223a, and meanwhile the first clamping driving element 6215b drives the first movable clamping plate 6214b to move towards the first fixed clamping plate 6213, and the first clamping slot 62141 of the first movable clamping plate 6214b cooperates with the first fixed clamping plate 6213 to hold the remaining three sampling tubes 90b (except the sampling tube 90c) on the second movable clamping plate 6223b. After the first movable clamping plate 6214a and the first movable clamping plate 6214b stably clamp the six sampling tubes 90, the second clamping driving element 6224a and the second clamping driving element 6224b synchronously drive the second movable clamping plate 6223a and the second movable clamping plate 6223b to switch to the released state, and release all the sampling tubes 90. The taking component 631 rises back to the first height position, and then the translation driving assembly 623 drives the whole movable clamping assembly 622 to retreat to the first position, and the second movable clamping plate 6223a and the second movable clamping plate 6223b remain in the released state. After the movable clamping assembly 622 retreats, the lifting driving mechanism 64 again drives the lifting beam 644 to descend, and the two taking components 631 put the two grabbed sampling tubes 90c into the same containing seat 613 of the centrifugal machine 61 through the feeding port 302. Then the turntable 612 of the centrifugal machine 61 rotates by 90°, so that the idle containing seat 613 is aligned with the feeding port 302. After the first feeding is completed, the second clamping driving element 6224a and the second clamping driving element 6224b are started again, drive the second movable clamping plate 6223a and the second movable clamping plate 6223b to move towards the second fixed clamping plate 6222, hold the remaining three sampling tubes 90a (the sampling tube 90d, the sampling tube 90e and the sampling tube 90f) on the first movable clamping plate 6214a and the remaining three sampling tubes 90b (the sampling tube 90d, the sampling tube 90e and the sampling tube 90f) on the first movable clamping plate 6214b respectively, and then the first clamping driving element 6215a and the first clamping driving element 6215b drive the first movable clamping plate 6214a and the first movable clamping plate 6214b to move away from each other to switch to the released state and release all the sampling tubes 90. The translation driving assembly 623 drives the whole movable clamping assembly 622 to translate to the second position again, and the above-mentioned actions that the taking component 631 descends to grab two sampling tubes 90 (the sampling tube 90d), the first movable clamping plate 6214a and the first movable clamping plate 6214b clamp the remaining sampling tubes 90 (the sampling tube 90e and the sampling tube 90f), the second movable clamping plate 6223a and the second movable clamping plate 6223b release all the sampling tubes 90, the taking component 631 rises, the movable clamping assembly 622 retreats, and the taking component 631 feeds (the sampling tube 90d) are repeated, so as to put the two sampling tubes 90d into the containing seat 613 of the centrifugal machine 61 aligned with the feeding port.After the fourth feeding, the eight sample tubes 90 are all fed into the four receiving seats 613 of the centrifuge 61, and the feeding stage ends. Then the rotating drive 616 of the centrifuge 61 drives the rotating shaft 614 to drive the rotating disc 612 to rotate synchronously, and the four receiving seats 613 move in a circular motion with the rotating disc 612 to centrifuge the mixed solution in the eight sample tubes 90. After the centrifugation is completed, the discharging stage starts. In the initial state of the discharging stage, the movable clamping assembly 622 of the discharging temporary storage mechanism 62b is in the first position, and the first movable clamping plate 6214a, the first movable clamping plate 6214b, the second movable clamping plate 6223a, and the second movable clamping plate 6223b are all in the released state, and the taking member 631 of the discharging taking mechanism 63b is at the first height position. Then the lifting drive 64 drives the lifting beam 644 to descend to the two taking members 631 of the discharging taking mechanism 63b to grab two sample tubes 90 in one receiving seat 613 of the centrifuge 61, and then the taking member 631 rises back to the first height position. The translation drive assembly 623 drives the entire movable clamping assembly 622 of the discharging temporary storage mechanism 62b to move to the second position, and the taking member 631 descends to the second height position. The second clamping drive members 6224a and 6224b drive the second movable clamping plates 6223a and 6223b to clamp the two sample tubes 90 (one sample tube each). Then the taking member 631 releases the sample tubes 90 and returns to the first height position, and the movable clamping assembly 622 retreats to the first position. The first clamping drive members 6215a and 6215b drive the first movable clamping plates 6214a and 6214b to clamp the two sample tubes 90, and then the second movable clamping plates 6223a and 6223b release the sample tubes 90. The rotating disc 612 of the centrifuge 61 rotates by 90°, so that the receiving seat 613 carrying the sample tubes 90 is aligned with the discharge port 303, and then the taking member 631 again descends to grab the two sample tubes 90 of the receiving seat 613, and the above process is repeated until the eight sample tubes 90 subjected to the centrifugation are all temporarily stored in the discharging temporary storage mechanism 62b (the first movable clamping plates 6214a and 6214b each clamp four sample tubes 90). Finally, the second grabbing device 1b grabs the sample tubes 90 from the discharging temporary storage mechanism 62b twice (four sample tubes 90 each time, the first time to grab the four sample tubes 90 clamped by the second movable clamping plate 6223a, and the second time to grab the sample tubes 90 clamped by the second movable clamping plate 6223b), and the second carrying device 9b drives the sample tubes 90 to be transferred to the second capping device 2b.

[0105] In some embodiments, the pipetting device 8 comprises a carrier plate 81 and a plurality of sealing plugs 82 fixed on the carrier plate 81, the upper end of the sealing plug 82 is connected to the pipetting mechanism, and the lower end of the sealing plug 82 is sealingly inserted into the pipette 100. When it is necessary to suck liquid, the pipetting mechanism generates negative pressure and transmits it to the pipette 100 through the sealing plug 82, so that the pipette 100 sucks the supernatant from the sampling tube 90. When it is necessary to discharge liquid, the pipetting mechanism switches to positive pressure mode and transmits positive pressure to the pipette 100 through the sealing plug 82, so as to push the liquid in the pipette 100 to discharge to the filtration device 7. As an embodiment, a plurality of fixing holes are formed on the carrier plate 81, the fixing holes are threaded holes, and the upper end of the sealing plug 82 is provided with external threads and is screwed into the fixing hole. As an example, the number of sealing plugs 82 on the carrier plate 81 is the same as the number of tube bodies 901 held by the second capping device 2b.

[0106] As an example, a plurality of pipettes 100 are placed on the pipette placing seat 20, and the working process of the pipetting device 8 is as follows: the second conveying device 9b first drives the pipetting device 8 to move from the second capping device 2b to above the pipette 100 of the pipette placing seat 20, and then the second conveying device 9b drives the pipetting device 8 to move downward so that the sealing plug 82 is inserted into the corresponding pipette 100, thereby fixing the pipette 100 to the lower end of the sealing plug 82, without manually inserting the pipette 100 and the sealing plug 82. Then the second conveying device 9b drives the pipetting device 8 to move upward so that the pipette 100 is separated from the pipette placing seat 20, and then the second conveying device 9b drives the pipetting device 8 fixed with the pipette 100 to move to the upper end of the tube body 901 of the sampling tube 90 held by the second capping device 2b, and then the second conveying device 9b drives the pipetting device 8 to move downward so that the pipette 100 is inserted into the corresponding tube body 901, and then the pipetting mechanism sucks at least part of the supernatant in the sampling tube 90 into the pipette 100. Then the second conveying device 9b drives the pipetting device 8 to move above the filtration device 7, so that the pipette 100 is inserted into the corresponding droplet tube 200, and the pipetting mechanism discharges the supernatant in the pipette 100 into the corresponding droplet tube 200. It should be noted that the pipetting mechanism in the present application can be a prior art, which is not limited here.

[0107] In some embodiments, please refer to Figure 7 and Figure 7The filtering device 7 comprises a limiting plate and a drip tube 200 detachably inserted into the limiting plate from top to bottom. The pipette 100 can be inserted into the drip tube 200 and inject the supernatant into the drip tube 200, and the drip tube 200 is used for filtering the supernatant. The pipetting device 8 further comprises a floating plate 83 and an elastic connecting member (not shown in the figure). The floating plate 83 is arranged at the lower end of the carrier plate 81, and the elastic connecting member elastically connects the carrier plate 81 and the floating plate 83. During the process that the pipette 100 injects the supernatant into the drip tube 200, the pipette 100 is partially inserted into the drip tube 200, the floating plate 83 abuts against the upper end of the drip tube 200, and the elastic connecting member is compressed between the carrier plate 81 and the floating plate 83. As an example, the elastic connecting member can be a compression spring. In this embodiment, the drip tube 200 is detachably inserted into the limiting plate from top to bottom, which can facilitate the operator to quickly assemble and disassemble and replace the drip tube 200, and effectively improve the operation efficiency. At the same time, during the injection process, under the action of the elastic connecting member, the floating plate 83 forms a continuous and stable downward pressing force on the drip tube 200, so that the drip tube 200 is pressed tightly on the limiting plate, ensuring the stable position of the drip tube 200 and improving the filtering stability. When the pipette 100 moves upward and separates from the drip tube 200 after the injection is completed, the pressing action of the floating plate 83 can fix the drip tube 200, so that the drip tube 200 always maintains a stable state of being inserted into the limiting plate, avoiding the friction (or liquid surface tension) between the pipette 100 and the inner wall of the drip tube 200 due to contact, which causes the drip tube 200 to rise synchronously with the pipette 100 when the pipette 100 is pulled out of the drip tube 200. Therefore, on the basis of convenient assembly and disassembly of the drip tube 200, the problem that the position of the drip tube 200 is unreliable and easy to be lifted during use due to detachable assembly is solved, and the operation convenience and use stability are considered.

[0108] In some embodiments, referring to Figure 20 The floating plate 83 is provided with an avoiding hole 831 corresponding to the sealing plug 82. The sealing plug 82 passes through the avoiding hole 831 from top to bottom in a clearance fit state, and there is also a clearance between the outer surface of the pipette 100 fixed at the lower end of the sealing plug 82 and the hole wall of the avoiding hole 831. Even when the floating plate 83 abuts against the upper end of the drip tube 200 and the elastic connecting member is compressed between the carrier plate 81 and the floating plate 83, there is still a clearance between the outer surface of the sealing plug 82 and the hole wall of the avoiding hole 831, and between the outer surface of the pipette 100 fixed at the lower end of the sealing plug 82 and the hole wall of the avoiding hole 831.

[0109] As an embodiment, referring to Figure 20The pipetting device 8 also includes a linear bearing 84 and a limiting post 85. The linear bearing 84 is fixed to the carrier plate 81. The upper end of the limiting post 85 is restricted outside the linear bearing 84. The lower end of the limiting post 85 passes through the linear bearing 84 and is fixed to the floating plate 83. The limiting post 85 can slide up and down within the range restricted by the linear bearing 84. An elastic connector is sleeved outside the limiting post 85. The upper end of the elastic connector abuts against the lower end of the linear bearing 84 or against the lower end of the carrier plate 81, and the lower end of the elastic connector abuts against the upper end of the floating plate 83. As an example, the limiting post 85 includes a smooth rod portion 851, a flange portion 852 protruding from the upper end of the smooth rod portion 851, and a threaded rod portion formed at the lower end of the smooth rod portion 851. The diameter of the flange portion 852 is larger than the diameter of the smooth rod portion 851. The flange portion 852 is restricted outside the linear bearing 84. The smooth rod portion 851 is inserted into the linear bearing 84. The threaded rod portion is threadedly connected to the floating plate 83. The threaded connection depth between the threaded rod portion and the floating plate 83 can be adjusted as needed, thereby adjusting the maximum distance between the carrier plate 81 and the floating plate 83.

[0110] In some embodiments, the limiting plate has an assembly hole into which the drip tube 200 is detachably inserted. As one embodiment, please refer to... Figure 20 The filter device 7 includes two limiting plates, namely a first limiting plate 71 and a second limiting plate 72. The first limiting plate 71 is spaced apart from the lower end of the second limiting plate 72 and is fixed integrally with the second limiting plate 72. The mounting holes of the first limiting plate 71 and the second limiting plate 72 are coaxially arranged. The drip tube 200 is detachably inserted into the mounting holes of the second limiting plate 72 and the first limiting plate 71 from top to bottom. As an example, the upper end of the drip tube 200 has an outwardly folded flange 20011. When the drip tube 200 is inserted into the mounting hole of the second limiting plate 72, the flange 20011 is supported on the upper end of the second limiting plate 72. In this embodiment, when installing the drip tube 200, simply align the drip tube 200 from top to bottom with the mounting holes of the second limiting plate 72 and the first limiting plate 71, inserting it without complex alignment adjustments. The outward-folding flange 20011 at the upper end of the drip tube 200 supports the upper surface of the second limiting plate 72, allowing for quick positioning of the drip tube 200 and ensuring it does not sink or shift during filtration. When replacing the drip tube 200, simply pull it upwards to remove it from the mounting holes of the two limiting plates. Furthermore, during liquid injection, the float plate 83 abuts against the flange 20011, increasing the contact area between the float plate 83 and the drip tube 200, further ensuring a stable downward pressing force from the float plate 83 onto the drip tube 200.

[0111] In some implementation methods, please refer toFigure 20 The sample pretreatment system further comprises a test bottle jig 40. The test bottle jig 40 is used to place the test bottle 300. The test bottle jig 40 is slidably connected to the bottom plate 30. An operator can slide the test bottle jig 40 in the horizontal direction by pulling it, move the test bottle jig 40 away from the filtrate receiving position below the drip tube 200, quickly take out the test bottle 300 filled with filtrate, put in an empty test bottle 300, without disassembling other components, and simplify the replacement operation of the test bottle 300. The bottom plate 30 is further provided with a first limiting seat 304 located on the moving path of the test bottle jig 40. When the test bottle jig 40 moves to abut against the first limiting seat 304, the first limiting seat 304 will form a rigid block to the test bottle jig 40, so that the test bottle jig 40 cannot continue to move in that direction, thereby forcing the test bottle 300 to stay in the preset position aligned directly below the drip tube 200, ensuring that the filtrate discharged by the drip tube 200 can accurately fall into the test bottle 300, and avoiding spilling of the filtrate due to deviation of the test bottle 300.

[0112] As an embodiment, please refer to Figure 20 The side of the test bottle jig 40 facing the first limiting seat 304 has a first adsorption block 401, which is adsorbed with the first limiting seat 304. When the test bottle jig 40 moves close to the first limiting seat 304, the first adsorption block 401 will generate an adsorption force with the first limiting seat 304. Not only can it guide the first limiting seat 304 to continue to approach the first limiting seat 304 to reduce the deviation error during sliding, but also can make the test bottle jig 40 be fixed and adsorbed on the first limiting seat 304 when the test bottle jig 40 finally abuts against the first limiting seat 304, avoiding displacement of the test bottle jig 40 during use, ensuring that the test bottle 300 is always stably in the preset receiving position, and ensuring the accuracy and reliability of filtrate collection. As an example, the bottom plate 30 is provided with two first sliding rails 305 arranged in parallel and spaced apart, the bottom of the test bottle jig 40 is provided with a first sliding block slidably connected with the first sliding rails 305, and the first adsorption block 401 is arranged between the two first sliding rails 305. As an example, the first adsorption block 401 is a magnet, and the first limiting seat 304 is a metal component that can be adsorbed by the magnet.

[0113] As an embodiment, please refer to Figure 2The filtering device 7 further comprises two support seats 73 arranged on both sides of the experimental bottle jig 40 and a second sliding rail 74 fixed to the support seat 73 in one-to-one correspondence, and the two second sliding rails 74 are arranged in parallel. The bottom of the first limiting plate 71 is provided with a second sliding block in sliding connection with the second sliding rail 74. When it is necessary to replace the dropping tube 200, the first limiting plate 71 or the second limiting plate 72 is only needed to be pulled to make the first limiting plate 71 and the second limiting plate 72 drive the dropping tube 200 to slide in the horizontal direction and move away from above the experimental bottle 300, so that the old dropping tube 200 can be quickly disassembled and the new dropping tube 200 can be quickly installed in an open space, and the operation is convenient. The filtering device 7 further comprises a second limiting seat 75 fixedly connected between the two support seats 73 and located on the moving path of the first limiting plate 71. The side of the first limiting plate 71 facing the second limiting seat 75 is provided with a second adsorption block 711, and the second adsorption block 711 is in adsorption cooperation with the second limiting seat 75. When the first limiting plate 71 moves to the position where the second adsorption block 711 abuts against the second limiting seat 75, the second limiting seat 75 will form a rigid block to the first limiting plate 71, so that the first limiting plate 71 cannot continue to move in this direction, thereby forcing the dropping tube 200 to stay in the preset position aligned above the experimental bottle 300, so as to ensure that the filtrate discharged from the dropping tube 200 can accurately fall into the experimental bottle 300. As an example, the second adsorption block 711 is a magnet, and the second limiting seat 75 is a metal material member that can be adsorbed by the magnet.

[0114] As an example, please refer to Figure 12 The dropping tube 200 can include a needle tube 2001 and a filter nozzle 2002 detachably arranged at the lower end of the needle tube 2001. The inside of the needle tube 2001 can also be provided with a filtering material as needed, such as filling superfine filter cotton, pasting a hydrophilic filter membrane, or placing an adsorption resin, so that the supernatant is first purified by the filtering material when flowing through the needle tube 2001, and then filtered again by the lower end filter nozzle 2002, forming double filtration protection, effectively removing small impurities, particles or specific pollutants in the supernatant, and providing purer filtrate for subsequent experiments. It should be noted that the filtering material in the needle tube and the filter nozzle can be prior art, which can be set according to actual conditions, and will not be described here.

[0115] In some embodiments, please refer to Figure 21 , Figure 21 and Figure 14The sample pretreatment system further comprises a waste chute 60 and a de-molding device 70. The de-molding device 70 is used for de-molding the pipette 100 inserted into the lower end of the pipetting device 8. Specifically, the de-molding device 70 is used for removing the pipette 100 inserted into the lower end of the sealing plug 82 of the pipetting device 8, and the pipette 100 separated from the sealing plug 82 falls into the waste chute 60 under the action of gravity. The de-molding device 70 comprises a lower plate 701 arranged above the waste chute 60, a cover plate 702 arranged at the upper end of the lower plate 701, and a de-molding plate 703 held between the lower plate 701 and the cover plate 702 and having elasticity. The lower plate 701 is provided with a first through hole 7011, the cover plate 702 is provided with a second through hole 7021 coaxially arranged with the first through hole 7011, and the de-molding plate 703 is provided with a third through hole 7031 coaxially arranged with the first through hole 7011. The diameter of the second through hole 7021 is slightly greater than or equal to the outer diameter of the pipette 100, the diameter of the second through hole 7021 is greater than the diameter of the third through hole 7031, the diameter of the second through hole 7021 is less than the diameter of the first through hole 7011, the diameter of the third through hole 7031 is less than the outer diameter of the pipette 100, and the third through hole 7031 is uniformly and spacedly provided with a plurality of groove structures 7032 penetrating the de-molding plate 703 and arranged around the axis of the third through hole 7031. As an embodiment, the de-molding plate 703 is a super glue plate.

[0116] In the embodiment, the first through hole 7011 of the lower plate 701 located below the stripper plate 703 has a large diameter, and there is no extrusion constraint on the hole peripheral area of the third through hole 7031 of the stripper plate 703. Therefore, when the pipette 100 passes through the third through hole 7031, the stripper plate 703 can deform downward (on the side of the lower plate 701) by its own elasticity, so that the pipette 100 can pass through the stripper plate 703. After the pipette 100 completes the liquid suction and liquid discharge, the second conveying device 9b drives the pipetting device 8 to move, so that the pipette 100 passes through the second through hole 7021 of the cover plate 702, the third through hole 7031 of the stripper plate 703, and the first through hole 7011 of the lower plate 701 in turn from top to bottom, until the upper end face of the pipette 100 is completely located below the third through hole 7031. Then the second conveying device 9b drives the pipetting device 8 to move upward. Since the second through hole 7021 of the cover plate 702 clamped above the stripper plate 703 has a small diameter (slightly larger than or equal to the outer diameter of the pipette 100), the hole peripheral area of the third through hole 7031 of the stripper plate 703 below is limited, which limits the deformation space of the stripper plate 703 upward, so that the stripper plate 703 cannot fully deform to the side of the cover plate 702 to adapt to the pipette 100 passing from bottom to top. Therefore, the upper end of the pipette 100 directly abuts against the hole peripheral area of the third through hole 7031 at the lower end of the stripper plate 703, and cannot continue to move upward with the sealing plug 82, so that the pipette 100 and the sealing plug 82 inserted together are completely separated, the pipette 100 loses the support of the sealing plug 82, and falls into the waste chute 60 below under the action of its own gravity, realizing the collection of the pipette 100, avoiding the scattering of the waste pipette 100, and improving the efficiency and safety of waste treatment. When removing the pipette, there is no need to manually touch the pipette 100, which not only reduces the manual operation steps, but also avoids the problems that may occur during manual operation, such as damage to the pipette 100, liquid residue, pollution of hands or experimental environment, etc. At the same time, it ensures that the separation process of each pipette 100 maintains consistent force and rhythm, reduces the influence of human operation error on the stability of equipment operation, and further improves the automation level and use safety of the device. As an example, during the stripping, the elastic connecting member is compressed between the carrier plate 81 and the floating plate 83, the floating plate 83 abuts against the upper end of the cover plate 702, and the floating plate 83 forms a stable pressure on the cover plate 702 through the compression force of the elastic connecting member, so as to avoid the accidental displacement or loosening of the cover plate 702 during the stripping process, which affects the stripping effect and improves the stability and reliability of the pipette 100 stripping.

[0117] As an embodiment, a plurality of first through holes 7011 are uniformly and regularly arranged on the lower plate 701, the number of the first through holes 7011 is equal to the number of the sealing plugs 82 of the pipetting device 8, equal to the number of the grabbing assemblies 11 of the second grabbing device 1b, and equal to the number of the support assemblies 22 of the second capping device 2b. Correspondingly, please refer to Figure 15The cover plate 702 is provided with a plurality of second through holes 7021, and the stripper plate 703 is provided with a plurality of third through holes 7031. The second through holes 7021 are arranged in one-to-one correspondence with the first through holes 7011, and the third through holes 7031 are arranged in one-to-one correspondence with the first through holes 7011.

[0118] As an implementation, please refer to Figure 14 and Figure 21 The groove structure 7032 includes two groove walls 70321 and a groove bottom 70322. One end of the groove wall 70321 is connected to the hole wall of the third through hole 7031, and the other end of the groove wall 70321 is connected to the groove bottom 70322. The distance between the two groove walls 70321 gradually decreases in the direction away from the hole wall of the third through hole 7031, which can provide a telescopic space for the deformation of the stripper plate 703 downward (on the side of the lower plate 701) when the pipette 100 passes through, and can avoid excessive deformation of the stripper plate 703 by gradually reducing the distance between the groove walls 70321, thereby reducing the stability of the stripper plate 703. As an example, the groove bottom 70322 of the groove structure 7032 is located on the first cylindrical surface, and the first cylindrical surface is coaxially arranged with the first through hole 7011. In some examples, the diameter of the first cylindrical surface is equal to the diameter of the first through hole 7011, which can ensure that the groove structure 7032 is uniformly stressed when the stripper plate 703 deforms, avoid local stress concentration, and further improve the stability of the dismounting process and the service life of the stripper plate.

[0119] As an implementation, please refer to Figure 1 The cover plate 702 is further provided with a guide circular platform 7022 formed on the upper end of the second through hole 7021. The upper end of the guide circular platform 7022 is connected to the upper end surface of the cover plate 702, the lower end of the guide circular platform 7022 is connected to the hole wall of the second through hole 7021, and the diameter of the guide circular platform 7022 gradually decreases from top to bottom, which facilitates the insertion of the pipette 100 into the second through hole 7021.

[0120] In some embodiments, please refer to Figure 19 The bottom plate 30 is further provided with a waste through hole 306, the waste slide 60 is fixed to the lower end of the bottom plate 30 and is connected to the waste through hole 306, and the stripper plate 70 is fixed to the upper end of the bottom plate 30.

[0121] In some embodiments, please refer to Figure 21 , Figure 1 and Figure 19The waste chute 60 defines a vertically open cavity, and a partition 80 is arranged in the waste chute 60 to divide the cavity into a first chute cavity 601 and a second chute cavity 602. The first chute cavity 601 is arranged above the material stripping device 70 and is used to guide the pipette 100 into the first waste collecting device. The second chute cavity 602 is used to guide the first waste (e.g., the used sampling tube 90) into the second waste collecting device. The embodiment can realize the classified guidance and independent collection of the two types of waste (i.e., the pipette 100 and the sampling tube 90), avoid the mixing of different waste to cause subsequent processing inconvenience or cross contamination, and improve the efficiency of the sample pre-treatment waste recovery.

[0122] For example, referring to Figure 21 , Figure 1 and Figure 2 , the inlet 6011 of the first chute cavity 601 and the inlet 6021 of the second chute cavity 602 are located on the same horizontal plane, and the outlet 6012 of the first chute cavity 601 and the outlet 6022 of the second chute cavity 602 are located on different horizontal planes. This can not only concentrate the two types of waste at the upper part of the waste chute 60 to save the lateral space of the equipment, but also adapt the first waste collecting device and the second waste collecting device to different installation positions through the different orientations of the outlets, improve the flexibility of the layout of the waste collecting device, and avoid the intersection and congestion of the two types of waste at the outlets. For example, the outlet 6012 of the first chute cavity 601 is located on a vertical plane, and the outlet 6022 of the second chute cavity 602 is arranged downward.

[0123] As an embodiment, the outer diameter of the pipette 100 gradually decreases from top to bottom, the diameter of the second through hole 7021 is slightly larger than or equal to the maximum outer diameter of the pipette 100, the diameter of the third through hole 7031 is smaller than the maximum outer diameter of the pipette 100, and the diameter of the third through hole 7031 is larger than the minimum outer diameter of the pipette 100. As an example, after the centrifugal treatment is completed, the working process of the sample pretreatment system is as follows: the second carrying device 9b drives the second grabbing device 1b to move to the unloading temporary storage mechanism 62b to hold the cover 902 of the sample tube 90, and then drives the second grabbing device 1b holding the sample tube 90 to move, and places the sample tube 90 on the second capping device 2b. After the second grabbing device 1b keeps clamping the cover 902, the second capping device 2b clamps the tube body 901 of the sample tube 90 and rotates the tube body 901, while the second carrying device 9b drives the second grabbing device 1b holding the cover 902 to move upwards, so that the cover 902 is unscrewed and separated from the tube body 901, and the cover 902 is still held by the second grabbing device 1b. After the cover is opened, the second carrying device 9b first drives the pipetting device 8 to move to the pipette placing seat 20 to obtain the pipette 100 (the sealing plug 82 is sealingly connected with the pipette 100), and then drives the pipetting device 8 holding the pipette 100 to move above the second capping device 2b, so that the pipette 100 is inserted into the tube body 901 of the sample tube 90. The pipetting mechanism transmits negative pressure through the sealing plug 82 to suck at least part of the supernatant in the tube body 901 into the pipette 100. After the supernatant is sucked, the second carrying device 9b drives the pipetting device 8 holding the pipette 100 to move above the filtering device 7, so that the pipette 100 is inserted into the droplet tube 200 of the filtering device 7. The pipetting mechanism is switched to a positive pressure mode, and the supernatant in the pipette 100 is injected into the droplet tube 200 through the sealing plug 82. After the supernatant is injected, the second carrying device 9b drives the pipetting device 8 to move to the unloading device 70, so that the pipette 100 sequentially passes through the second through hole 7021 of the cover plate 702, the third through hole 7031 of the unloading plate 703, and the first through hole 7011 of the lower plate 701 from top to bottom, and the upper end surface of the pipette 100 is completely located below the third through hole 7031. Then the second carrying device 9b drives the pipetting device 8 to move upwards, and the pipette 100 is blocked below the unloading plate 703 due to the limitation of the cover plate 702 to the upward deformation of the unloading plate 703, and the pipette 100 is separated from the sealing plug 82. After the pipette 100 is separated, it falls into the first waste collection device through the first slide cavity 601 under the action of gravity.In the process, the second gripping device 1b holds the cover 902, after the pipette 100 is separated from the sealing plug 82, the second carrying device 9b drives the second gripping device 1b to move, so that the cover 902 is aligned with the pipe opening of the pipe body 901 of the sampling tube 90, the second capping device 2b drives the pipe body 901 to rotate, and the second gripping device 1b holds the cover 902 and moves downward, so that the cover 902 is screwed with the pipe body 901. After the screwing is completed, the second capping device 2b releases the pipe body 901, the second carrying device 9b drives the second gripping device 1b holding the sampling tube 90 to move above the second slide cavity 602, and then the second gripping device 1b switches to the release state, releases the sampling tube 90, and the sampling tube 90 falls into the second waste collecting device through the second slide cavity 602 under the action of gravity, completing the disposal of the sampling tube 90.

[0124] Please refer to Figure 12 、 Figures 16 to 19 、 ​ 、 ​ The centrifugal device 6 of the embodiment includes an inlet 302 and an outlet 303 arranged oppositely, a centrifuge 61, two temporary storage mechanisms 62, and two material taking mechanisms 63. The centrifuge 61 is arranged below the inlet 302 and the outlet 303, and is used for centrifugal processing of mixed liquid contained in the sampling tube 90. The two temporary storage mechanisms 62 are an inlet temporary storage mechanism 62a and an outlet temporary storage mechanism 62b. The inlet temporary storage mechanism 62a is arranged at one side of the inlet 302, and the outlet temporary storage mechanism 62b is arranged at one side of the outlet 303. The two material taking mechanisms 63 are an inlet material taking mechanism 63a arranged at the inlet 302 and an outlet material taking mechanism 63b arranged at the outlet 303. The inlet temporary storage mechanism 62a is used for storing the sampling tube 90 carried to the centrifugal device 6, and is also used for moving the sampling tube 90 in the horizontal direction to above the inlet 302. The inlet material taking mechanism 63a is used for placing the sampling tube 90 moved to above the inlet 302 in the vertical direction in the centrifuge 61. The outlet material taking mechanism 63b is used for moving the sampling tube 90 in the centrifuge 61 in the vertical direction to above the outlet 303. The outlet temporary storage mechanism 62b is used for receiving the sampling tube 90 moved to above the outlet 303 by the outlet material taking mechanism 63b and storing the sampling tube 90.

[0125] In the embodiments of the present application, the feeding temporary storage mechanism 62a can batch receive the preceding sampling tubes 90 and cooperate with the feeding and taking mechanism 63a to batch deliver according to the requirements of the centrifuge 61, and the discharging temporary storage mechanism 62b can collect the sampling tubes 90 batch output by the discharging and taking mechanism 63b and then uniformly supply to the subsequent equipment, which not only improves the feeding and discharging efficiency, eliminates the process bottleneck, and guarantees the smooth connection of the process. Moreover, the feeding and taking mechanism 63 only vertically moves the sampling tube 90, which can avoid the trajectory deviation and collision risk caused by horizontal movement, and the temporary storage mechanism 62 only horizontally moves the sampling tube 90, which can accurately complete the batch transfer and quantity distribution. The two actions are single and clear in division, which not only improves the stability and precision of the sampling tube 90 transfer, but also simplifies the device control logic, guarantees the efficient connection of the centrifuge device 6 and the preceding and subsequent devices.

[0126] The specific structure, working mode and technical effect of the centrifuge device 6 of the embodiments of the present application are described in the description of the sample pretreatment system of the embodiments of the present application, and are not described here.

[0127] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0128] The above embodiments only express the preferred implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A centrifugation device, characterized in that, The application relates to a centrifuge device for processing mixed liquid in sample tubes. The centrifuge device comprises: a feeding port and a discharging port arranged oppositely; a centrifuge arranged below the feeding port and the discharging port, used for centrifugal processing of mixed liquid in sample tubes; two temporary storage mechanisms, i.e. a feeding temporary storage mechanism and a discharging temporary storage mechanism, wherein the feeding temporary storage mechanism is arranged at one side of the feeding port, and the discharging temporary storage mechanism is arranged at one side of the discharging port; and two material taking mechanisms, i.e. a feeding material taking mechanism arranged at the feeding port and a discharging material taking mechanism arranged at the discharging port; wherein the feeding temporary storage mechanism is used for storing the sample tubes which are transported to the centrifuge device, and the feeding temporary storage mechanism is also used for moving the sample tubes in a horizontal direction to above the feeding port, the feeding material taking mechanism is used for placing the sample tubes moved to above the feeding port in the centrifuge in a vertical direction, the discharging material taking mechanism is used for moving the sample tubes in the centrifuge to above the discharging port in a vertical direction, and the discharging temporary storage mechanism is used for receiving the sample tubes moved to above the discharging port by the discharging material taking mechanism and storing the sample tubes; the material taking mechanism comprises a material taking member which can move up and down and is used for holding the sample tubes, the material taking member of the feeding material taking mechanism is arranged in correspondence with the feeding port in a vertical direction, and the material taking member of the discharging material taking mechanism is arranged in correspondence with the discharging port in a vertical direction; the temporary storage mechanism comprises a fixed clamping assembly, a movable clamping assembly and a translation driving assembly, the fixed clamping assembly and the movable clamping assembly are used for holding or releasing the sample tubes, the movable clamping assembly is connected to the upper side of the fixed clamping assembly in a translation mode, and the translation driving assembly can drive the movable clamping assembly to move to a first position or a second position relative to the fixed clamping assembly, and the movable clamping assembly in the first position is located directly above the fixed clamping assembly; in the feeding temporary storage mechanism, part of the sample tubes held by the movable clamping assembly in the second position is located between the feeding port and the material taking member of the feeding material taking mechanism, and the material taking member of the feeding material taking mechanism is used for placing the sample tubes between the feeding port and the material taking member into the centrifuge through the feeding port; in the discharging temporary storage mechanism, part of the movable clamping assembly in the second position is located between the discharging port and the material taking member of the discharging material taking mechanism, and the material taking member of the discharging material taking mechanism is used for grabbing the sample tubes below the discharging port in the centrifuge and placing the sample tubes on the movable clamping assembly in the second position. The centrifugal device further comprises a lifting driving mechanism, the lifting driving mechanism comprises a lifting driving piece, a screw rod, a screw nut, a lifting beam and two mounting plates, the screw rod is vertically arranged, the screw nut is drivingly connected to the outside of the screw rod, the two mounting plates are symmetrically arranged on the two sides of the screw rod, the mounting plates are provided with lifting limiting holes extending in the vertical direction, the lifting beam is fixed to the screw nut, and the two ends of the lifting beam respectively pass through the lifting limiting holes of the two mounting plates, the inlet and outlet material taking mechanisms are fixed to the one end and the other end of the lifting beam respectively, and the lifting driving piece is used for driving the screw rod to rotate so as to move the lifting beam up and down.

2. The centrifuge device of claim 1, wherein, The fixed clamping assembly comprises a bottom lining plate, a backing plate, a first fixed clamping plate, a first movable clamping plate and a first clamping driving piece, the backing plate and the first fixed clamping plate are fixed to the upper end of the bottom lining plate, the first clamping driving piece is fixed to the backing plate, the first movable clamping plate is fixed to the output end of the first clamping driving piece, and the first clamping driving piece is used for driving the first movable clamping plate to move towards the first fixed clamping plate or away from the first fixed clamping plate to hold or release the sample tube; The movable clamping assembly comprises a pushing plate, a second fixed clamping plate, a second movable clamping plate and a second clamping driving piece, the pushing plate is slidably connected to the backing plate in the direction of approaching or moving away from the corresponding material taking mechanism, the second fixed clamping plate is located above the first fixed clamping plate and is fixed opposite to the pushing plate, the second clamping driving piece is fixed to the pushing plate, the second movable clamping plate is fixed to the output end of the second clamping driving piece, and the second clamping driving piece is used for driving the second movable clamping plate to move towards the second fixed clamping plate or away from the second fixed clamping plate to hold or release the sample tube; The output end of the translation driving assembly is fixed to the second fixed clamping plate.

3. The centrifuge device of claim 2, wherein, The fixed clamping assembly comprises two backing plates, two first movable clamping plates and two first clamping driving pieces, the two backing plates are symmetrically arranged on the two sides of the first fixed clamping plate, the first clamping driving pieces are correspondingly arranged with the backing plates, and the first movable clamping plates are correspondingly arranged with the first clamping driving pieces. The movable clamping assembly comprises two pushing plates, two second movable clamping plates and two second clamping driving pieces, the pushing plates are correspondingly arranged with the backing plates, the second clamping driving pieces are correspondingly arranged with the pushing plates, and the second movable clamping plates are correspondingly arranged with the second clamping driving pieces.

4. The centrifuge device of claim 3, wherein, Each of the first movable clamping plates is provided with a plurality of first clamping grooves on the side facing the first fixed clamping plate, and each of the second movable clamping plates is provided with a plurality of second clamping grooves on the side facing the second fixed clamping plate, the number of the second clamping grooves being equal to that of the first clamping grooves, when the fixed clamping assembly holds the sample tubes, the sample tubes are held between the corresponding first clamping grooves and the first fixed clamping plate, and when the movable clamping assembly holds the sample tubes, the sample tubes are held between the corresponding second clamping grooves and the second fixed clamping plate; When the movable clamping assembly is in the first position, the second clamping grooves are arranged one by one corresponding to the first clamping grooves, and the second clamping grooves are arranged above the first clamping grooves, and when the movable clamping assembly is in the second position, one of the second clamping grooves is arranged above the inlet or the outlet, and the rest of the second clamping grooves are arranged above the corresponding first clamping grooves.

5. The centrifuge device of claim 4, wherein, The centrifugal mechanism comprises a rotating disc which can rotate around its own axis and a plurality of receiving seats arranged circumferentially on the rotating disc, all the receiving seats are arranged uniformly and circumferentially around the rotating disc, and each of the receiving seats can be used to receive two sample tubes. Each of the sample tube taking mechanisms comprises two sample tube taking members, and each of the sample tube taking members is used to grab one sample tube at a time.

6. The centrifuge device of claim 5, wherein, The tube body of the sample tube comprises a cylindrical tube part and a conical tube part connected to the lower end of the cylindrical tube part, the receiving seat comprises a fixed ring rotatably connected to the rotating disc and a bottom support frame fixed to the lower end of the fixed ring, two first receiving holes are arranged on the fixed ring, the cylindrical tube part of each sample tube is arranged in the corresponding first receiving hole, a second receiving hole coaxially arranged corresponding to the first receiving hole is arranged on the bottom support frame, the diameter of the second receiving hole is greater than the diameter of the lower end of the conical tube part and less than the diameter of the upper end of the conical tube part, and the conical tube part of each sample tube is supported in the corresponding second receiving hole.

7. The centrifuge device of claim 1, wherein, The inlet and the outlet are arranged on the bottom plate, the centrifuge is arranged at the lower end of the bottom plate, and the temporary storage mechanism and the sample tube taking mechanism are arranged at the upper end of the bottom plate.

8. A sample pre-treatment system characterized by, The centrifugal device comprises the centrifugal device according to any one of claims 1 to 7. The centrifugal device comprises the centrifugal device according to any one of claims 1 to 7.

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