Sampling device for medicine experiment

Abstract

The invention discloses a sampling device for a medicine experiment, and belongs to the technical field of medicine sampling, the sampling device for the medicine experiment comprises a supporting base, the interior of the supporting base is of a hollow structure, the top end of the supporting base is open, and a plurality of notches are formed in the top of the supporting base in a penetrating mode; a top plate is fixedly connected to the top end of the supporting base, a fixing plate is fixedly connected to the telescopic end of the hydraulic rod, a suction sampling mechanism is installed at the bottom of the fixing plate, and a medicine fixing mechanism is arranged on the surface of the top end of the top plate. By adopting the medicine fixing mechanism and the suction sampling mechanism, multiple medicine samples can be sampled at the same time, the one-by-one treatment time is shortened, contact between the samples is avoided, the risk of cross contamination is reduced, meanwhile, the sampling amount each time can be accurately controlled, too much or too little sampling at a time is avoided, errors are reduced, and the efficiency is improved. And the sampling consistency and accuracy are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of drug sampling, and in particular relates to a sampling device for drug experiments. Background Art

[0002] With the continuous expansion of the global pharmaceutical market, pharmaceutical manufacturers need to meet the requirements of international drug registration and market access. Many countries and regions have strict requirements for drug quality control. Drug quality control is the basis for ensuring drug safety, effectiveness and consistency. In the process of drug research and development, production and marketing, a large number of laboratory analyses and tests are often required, such as: ingredient analysis, impurity detection, stability testing, microbial testing, etc. In order to accurately evaluate the quality of drugs, the role of sampling devices is crucial. Through scientific sampling methods and professional sampling devices, it can be ensured that the samples are representative and the influence of sample deviation on experimental results can be avoided. Through high-quality sampling devices, it can provide strong guarantees for drug research and development, production and quality control, ensuring that the final produced drugs meet the requirements of safety, effectiveness and quality consistency.

[0003] Existing sampling devices often use a sampling needle to put it into a medicine bottle, and use gravity to make the medicine automatically enter the sampling needle. The flow rate and flow characteristics of the medicine (such as viscosity, density, etc.) during the sampling process are affected by many factors. It is difficult for the sampling needle to accurately control the sampling amount each time, which can easily lead to sample amount deviation or waste. In addition, when sampling by gravity, the sampling speed is unstable. Especially when the fluidity of the medicine inside the medicine bottle is poor, the sampling speed will be affected by environmental factors such as the pressure and temperature inside the bottle, which will cause the sampling process to become slower or unstable. This volatility can easily affect the efficiency of sampling. Moreover, only one medicine bottle can be sampled at a time, and multiple samples cannot be processed at the same time, resulting in a long sampling time, especially in large-scale production or quality control, which limits work efficiency. If samples in different medicine bottles are sampled through the same sampling needle, cross-contamination between samples may occur, especially for samples that need to be strictly separated, which increases errors and risks. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a sampling device for drug experiments.

[0005] The technical solution adopted to solve the above technical problems is: a sampling device for drug experiments, including a support base, the interior of the support base is a hollow structure, and the top of the support base is open, a plurality of slots are opened through the top of the support base, and the plurality of slots are symmetrically distributed on the circumference, a top plate is fixedly connected to the top of the support base, a plurality of hydraulic rods are installed on the top surface of the top plate, the telescopic ends of the hydraulic rods are fixedly connected to a fixed plate, a suction sampling mechanism is installed at the bottom of the fixed plate, and a drug fixing mechanism is arranged on the top surface of the top plate.

[0006] Through the above technical solution, it is possible to ensure that the drug samples are uniform and avoid the problem of uneven distribution of drug ingredients. At the same time, it is possible to effectively prevent the external environment from contaminating the samples, especially in the process of drug production and research and development, avoiding contamination by external bacteria, dust, etc.

[0007] Furthermore, the medicine fixing mechanism includes a plurality of crosses, and the plurality of crosses are symmetrically distributed in a circle. The cross is fixedly connected to the top plate, and the cross end of the cross is arranged in a cylindrical structure. A disc is rotatably connected to the top of the cross, and a plurality of arc grooves are opened through the disc. The plurality of arc grooves are symmetrically distributed in a circle, and the cross end of the cross is slidably connected to a slider.

[0008] Through the above technical solution, through automation and parallel operation, the manual operation steps are reduced, making the entire sampling process more efficient, avoiding the repetitive operation of manual single sampling, improving the overall production efficiency, and reducing the need for manual operation and the impact of human factors on sampling accuracy and results.

[0009] Furthermore, a splint is fixedly connected to the top of the slider, the connection between the splint and the slider is located at an arc groove, the splint is slidably connected to the disc, and the disc limits the splint, a medicine bottle is clamped and fixed between several of the splints located at the top of the disc, the hydraulic rod is located between two discs, and a gap is set between the hydraulic rod and the disc.

[0010] Through the above technical solution, samples of different medicines can be fixed to avoid contact between samples, reduce the risk of cross contamination, ensure the purity and accuracy of each medicine, and by clamping and fixing the medicine bottle, the sample can remain stable during the sampling process to avoid errors caused by sample shaking or improper position, thereby ensuring the consistency of the sampling results.

[0011] Furthermore, a gear ring is clamped at the bottom end of the top plate, and the gear ring is slidably connected to the top plate, the gear ring is transmission-connected to a plurality of driven gears, the driven gear connecting shaft is rotationally connected to the top plate, the through-end of the driven gear connecting shaft is rotationally connected to the cross, and the through-end of the driven gear connecting shaft is fixedly connected to the disc, one of the driven gears is transmission-connected to a driving gear on the side away from the gear ring, and the driving gear is rotationally connected to the top plate.

[0012] Through the above technical solution, multiple samples can be fixed at the same time, which helps to achieve batch processing, simplify operating procedures and sample management, and improve laboratory work efficiency.

[0013] Furthermore, a second synchronous wheel is rotatably connected at the center of the bottom surface of the top plate, and a first synchronous wheel is fixedly connected to the side of the driving gear away from the top plate. The first synchronous wheel and the second synchronous wheel are connected through a first synchronous belt transmission. A first motor is installed at the center of the top surface of the top plate, and an output end of the first motor is rotatably connected to the top plate, and a through end of the first motor is fixedly connected to the second synchronous wheel, and the driving gear and the first synchronous belt are located at the groove.

[0014] Through the above technical solution, samples from different batches or different production links can be obtained at the same time, which improves the representativeness of the data. In addition, multi-point parallel sampling can reduce the single sampling error through multiple independent samplings, thereby improving the accuracy of the experimental results.

[0015] Furthermore, the fixed plate is penetrated by a plurality of through holes, the extraction sampling mechanism includes a plurality of sampling tubes, the tops of the sampling tubes are in an open state, the sampling tubes are located inside the through holes, and the sampling tubes are fixedly connected to the fixed plate, the inner walls of the top ends of the sampling tubes are fixedly connected to a fixing frame, the top end of the fixing frame is rotatably connected to a third synchronous wheel, the fixing frame and the third synchronous wheel are threadedly connected to a threaded rod, and the bottom end of the threaded rod is rotatably connected to a connecting frame.

[0016] Through the above technical solution, for some solid or precipitated medicines, the components of the medicines may be unevenly distributed in the container. The gradual suction process can gradually obtain medicine samples, making the final sample components more representative and reducing the uneven components caused by one-time extraction.

[0017] Furthermore, the connecting frame is arranged in a U-shaped structure, and a piston plate is fixedly connected to the bottom end of the connecting frame. The center of the piston plate is hollowed out, and the piston plate is slidably connected to the inner wall of the sampling tube. A first cover plate is hinged on the top surface of the piston plate, and the diameter of the first cover plate is larger than the hollow hole at the center of the piston plate. A second cover plate is hinged on the bottom end of the sampling tube, and the hinge direction of the second cover plate is consistent with the hinge direction of the first cover plate.

[0018] The above technical solution helps to gradually increase the representativeness of samples during the sampling process, especially when dealing with complex samples, such as medicines containing suspended matter, bubbles or precipitation. By suctioning in batches, more comprehensive and uniform samples can be gradually obtained.

[0019] Furthermore, a plurality of fourth synchronous wheels are rotatably connected to the top surface of the fixed plate, and the plurality of fourth synchronous wheels are connected to the third synchronous wheels through a second synchronous belt transmission, and the second synchronous belt is arranged in a cross-shaped structure. A second motor is installed on the bottom surface of the fixed plate, and an output end of the second motor is rotatably connected to the fixed plate, and a through end of the second motor is fixedly connected to one of the fourth synchronous wheels.

[0020] Through the above technical solution, it can be ensured that the samples taken from the batch of drugs are well representative and reflect the actual quality and component distribution of the drugs in the entire batch or container.

[0021] The beneficial effects of the present invention are as follows: (1) The present invention adopts a drug fixing mechanism. The operation of the first motor drives the second synchronous wheel to rotate. Under the action of the first synchronous belt, the first synchronous wheel is driven to rotate synchronously, thereby causing the driving gear to rotate, driving one of the driven gears to rotate at the same time. Under the action of the ring gear, several driven gears are rotated at the same time, thereby driving the disk to rotate. Under the action of the arc groove, the clamping plate slides on the cross to clamp and fix the medicine bottle. Samples can be extracted from multiple medicine bottles at the same time, greatly improving the sampling speed. It is especially suitable for occasions that require high-throughput sampling. At the same time, it can reduce the need for manual operation and reduce the impact of human factors on sampling accuracy and results. Automation can also ensure the consistency and reliability of each sampling and ensure the repeatability of experimental data; (2) The present invention adopts a suction sampling mechanism. The hydraulic rod is operated to make the sampling tube on the top enter the inside of the medicine bottle. Then the second motor rotates forward and reversely to drive one of the fourth synchronous wheels to rotate. With the cooperation of the second synchronous belt, the third synchronous wheel on the top of the fixed frame rotates, and then the threaded rod is lifted and lowered, prompting the sampling tube to perform a gradual suction operation. The amount of sampling each time can be accurately controlled to avoid excessive or insufficient extraction at one time, thereby reducing errors and ensuring the consistency and accuracy of sampling. In addition, samples can be extracted in multiple times through gradual suction, which can effectively avoid cross contamination between different batches, different groups or different containers. At the same time, gradual suction can ensure that the purity of each sample is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2is a second viewing angle structural schematic diagram of the present invention; Figure 3 It is a third perspective structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the top structure of the top plate of the present invention; Figure 5 yes Figure 4 A schematic diagram of the enlarged structure at point A; Figure 6 It is a schematic structural diagram of the connection between the threaded rod and the fixing frame of the present invention from a first perspective; Figure 7 It is a structural schematic diagram of the connection between the threaded rod and the fixing frame of the present invention from a second viewing angle; Figure 8 yes Figure 6 A schematic diagram of the enlarged structure at C; Fig. 9 yes Figure 7 A schematic diagram of the structure at D of FIG. Fig.10 It is a schematic diagram of the structure of the connection between the sampling tube and the fixing plate of the present invention; Fig.11 It is a schematic diagram of the local structure of the top surface of the top plate of the present invention; Fig.12 It is a schematic diagram of the structure of the connection between the gear ring and the top plate of the present invention; Fig.13 It is an exploded view of the connection between the ring gear and the driven gear of the present invention; Fig.14 yes Fig.11 Schematic diagram of the enlarged structure at B.

[0023] Figure numerals: 1. support base; 2. notch; 3. top plate; 4. fixed plate; 5. hydraulic rod; 6. medicine bottle; 7. sampling tube; 8. first motor; 9. ring gear; 10. driven gear; 11. driving gear; 12. first synchronous wheel; 13. second synchronous wheel; 14. first synchronous belt; 15. cross; 16. slider; 17. splint; 18. disc; 19. arc groove; 20. through hole; 21. fixed frame; 22. third synchronous wheel; 23. second synchronous belt; 24. threaded rod; 25. second motor; 26. fourth synchronous wheel; 27. connecting frame; 28. piston plate; 29. ​​first cover plate; 30. second cover plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] like Figure 1-Figure 10The present embodiment shows a sampling device for drug experiments, comprising a support base 1, the interior of the support base 1 is a hollow structure, and the top of the support base 1 is open, a plurality of slots 2 are provided through the top of the support base 1, and the plurality of slots 2 are symmetrically distributed in a circle, a top plate 3 is fixedly connected to the top of the support base 1, a plurality of hydraulic rods 5 are installed on the top surface of the top plate 3, a fixed plate 4 is fixedly connected to the telescopic end of the hydraulic rod 5, and a suction sampling mechanism is installed at the bottom of the fixed plate 4, which can ensure that the drug sample is uniform and avoid the problem of uneven distribution of drug components. At the same time, it can effectively prevent the external environment from polluting the sample, especially in the process of drug production and research and development, to avoid the pollution of external bacteria, dust, etc., and the fixed plate 4 is provided with a plurality of The through hole 20, the suction sampling mechanism includes a plurality of sampling tubes 7, the top of the sampling tube 7 is in an open state, the sampling tube 7 is located inside the through hole 20, and the sampling tube 7 is fixedly connected to the fixed plate 4, the inner wall of the top of the sampling tube 7 is fixedly connected to a fixing frame 21, the top of the fixing frame 21 is rotatably connected to a third synchronous wheel 22, and the top surface of the fixed plate 4 is rotatably connected to a plurality of fourth synchronous wheels 26, which helps to gradually increase the representativeness of the sample during the sampling process, especially when dealing with complex samples, such as medicines containing suspended matter, bubbles or precipitation, by suctioning in batches, more comprehensive and uniform samples can be gradually obtained, and the plurality of fourth synchronous wheels 26 are connected to the third synchronous wheel 22 through a second synchronous belt 23 for transmission, and the second synchronous belt 23 is designed in a cross-shaped structure. The second motor 25 is installed on the bottom surface of the fixed plate 4. Through automation and parallel operation, the manual operation steps are reduced, making the entire sampling process more efficient, avoiding the repeated operation of manual single sampling, improving the overall production efficiency, and reducing the need for manual operation, reducing the influence of human factors on the sampling accuracy and results. The output end of the second motor 25 is rotatably connected with the fixed plate 4, and the through end of the second motor 25 is fixedly connected with one of the fourth synchronous wheels 26. The fixed frame 21 and the third synchronous wheel 22 are threadedly connected with a threaded rod 24, which can ensure that the samples extracted from the batch of drugs have good representativeness and reflect the true quality and component distribution of the drugs in the entire batch or container. The bottom end of the threaded rod 24 is rotatably connected with the fixed plate 4. The connecting frame 27 is dynamically connected, and the connecting frame 27 is set in a U-shaped structure. The bottom end of the connecting frame 27 is fixedly connected to a piston plate 28, and the center of the piston plate 28 is hollowed out. The piston plate 28 is slidably connected to the inner wall of the sampling tube 7. The top surface of the piston plate 28 is hinged with a first cover plate 29, and the diameter of the first cover plate 29 is larger than the hollow hole at the center of the piston plate 28. The bottom end of the sampling tube 7 is hinged with a second cover plate 30, and the hinge direction of the second cover plate 30 is consistent with the hinge direction of the first cover plate 29. For some solid or precipitated drugs, the components of the drugs may be unevenly distributed in the container. The gradual suction process can gradually obtain drug samples, so that the final sample components are more representative and the uneven components caused by one-time extraction are reduced. like Figure 4 and Figure 11-Figure 14 As shown, a medicine fixing mechanism is arranged on the top surface of the top plate 3, and the medicine fixing mechanism includes a plurality of crosses 15, and the plurality of crosses 15 are arranged in a circumferentially symmetrical distribution. The crosses 15 are fixedly connected to the top plate 3, and a second synchronous wheel 13 is rotatably connected at the center of the bottom surface of the top plate 3. A first synchronous wheel 12 is fixedly connected to the side of the driving gear 11 away from the top plate 3, and the first synchronous wheel 12 and the second synchronous wheel 13 are connected through a first synchronous belt 14. A first motor 8 is installed at the center of the top surface of the top plate 3, which can fix samples of different medicines, avoid contact between samples, reduce the risk of cross contamination, ensure the purity and accuracy of each medicine, and fix the medicine by clamping Bottle 6, so that the sample remains stable during the sampling process, avoids errors caused by sample shaking or improper position, and ensures the consistency of the sampling results. The output end of the first motor 8 is rotatably connected with the top plate 3, and the through end of the first motor 8 is fixedly connected with the second synchronous wheel 13. The driving gear 11 and the first synchronous belt 14 are located at the notch 2. The bottom end of the top plate 3 is clamped with a gear ring 9, and the gear ring 9 is slidably connected with the top plate 3. The gear ring 9 is transmission-connected with a plurality of driven gears 10. The driven gear 10 connecting shaft is rotatably connected with the top plate 3, and the driven gear 10 connecting shaft through-end is rotatably connected with the cross 15, and the driven gear 10 connecting shaft through-end is fixedly connected with the disc 18, one of which is driven by the driven gear 10. The side of the moving gear 10 away from the gear ring 9 is transmission-connected with a driving gear 11, and the driving gear 11 is rotationally connected to the top plate 3, so that multiple samples can be fixed at the same time, which is helpful to realize batch processing, simplify the operation process and sample management, and improve the work efficiency of the laboratory. The cross end of the cross 15 is set in a cylindrical structure, and the top of the cross 15 is rotationally connected with a disk 18, and the disk 18 is penetrated by a plurality of arc grooves 19, and the plurality of arc grooves 19 are symmetrically distributed on the circumference. The cross end of the cross 15 is slidably connected with a slider 16, and the top of the slider 16 is fixedly connected with a clamping plate 17, and the connection between the clamping plate 17 and the slider 16 is located at the arc groove 19, and the clamping plate 17 is slidably connected to the disk 18 , and the disc 18 limits the clamping plate 17. The medicine bottle 6 is clamped and fixed between several clamping plates 17 located on the top of the disc 18, which can be cleaned and maintained more conveniently. Since the sampling of each medicine bottle 6 is carried out independently, cross contamination between different medicines is avoided. During cleaning, only local treatment needs to be performed on each device, saving cleaning time and cost. The hydraulic rod 5 is located between the two discs 18, and a gap is set between the hydraulic rod 5 and the disc 18. Samples from different batches or different production links can be obtained at the same time, which improves the representativeness of the data. In addition, multi-point parallel sampling can reduce the single sampling error through multiple independent samplings, thereby improving the accuracy of the experimental results.

[0026] The working principle of this embodiment is as follows: the medicine bottle 6 containing the medicine is placed on the disc 18, and then the first motor 8 is operated to drive the second synchronous wheel 13 to rotate, and under the action of the first synchronous belt 14, the first synchronous wheel 12 is driven to rotate synchronously, thereby causing the driving gear 11 to rotate, driving one of the driven gears 10 to rotate at the same time, and then under the action of the ring gear 9, several driven gears 10 are rotated at the same time, thereby driving the disc 18 to rotate, and the clamping plate 17 is caused to slide on the cross 15 under the action of the arc groove 19 to clamp and fix the medicine bottle 6, and then the hydraulic rod 5 is operated to make the sampling tube 7 on the top enter the inside of the medicine bottle 6, and then the second motor 25 is operated forward and reversely, driving one of the fourth synchronous wheels 26 to rotate, and under the cooperation of the second synchronous belt 23, the third synchronous wheel 22 on the top of the fixed frame 21 is rotated, thereby causing the threaded rod 24 to perform the lifting process; When the threaded rod 24 rises, the connecting frame 27 and the piston plate 28 at the bottom thereof are driven to rise simultaneously. Under the action of air pressure, the first cover plate 29 at the top of the piston plate 28 is in a closed state, and the second cover plate 30 at the bottom of the sampling tube 7 is rotated, and the bottom end of the sampling tube 7 is open. The medicine in the medicine bottle 6 is pressed into the interior of the sampling tube 7 under the action of atmospheric pressure. When the threaded rod 24 descends, the connecting frame 27 and the piston plate 28 at the bottom thereof are driven to descend simultaneously. Under the action of air pressure, the first cover plate 29 on the top of the piston plate 28 rotates, causing the center of the piston plate 28 to be in an open state, and the second cover plate 30 at the bottom of the sampling tube 7 rotates in the opposite direction, and the bottom of the sampling tube 7 is closed. By repeating the above operation, the amount of drug sample extracted each time can be accurately controlled. The user can adjust the amount extracted according to the experimental requirements to ensure the representativeness and accuracy of the sampling and avoid errors of too much or too little samples.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A sampling device for drug experiments, comprising a support base (1), characterized in that: The support base (1) is provided with a hollow structure inside, and the top of the support base (1) is open, a plurality of slots (2) are provided through the top of the support base (1), and the plurality of slots (2) are provided in a symmetrical distribution in a circle, a top plate (3) is fixedly connected to the top of the support base (1), a plurality of hydraulic rods (5) are installed on the top surface of the top plate (3), a fixed plate (4) is fixedly connected to the telescopic end of the hydraulic rod (5), a suction sampling mechanism is installed at the bottom of the fixed plate (4), and a medicine fixing mechanism is provided on the top surface of the top plate (3); The medicine fixing mechanism comprises a plurality of crosses (15), wherein the plurality of crosses (15) are symmetrically distributed around the circumference, the crosses (15) are fixedly connected to the top plate (3), the cross ends of the crosses (15) are arranged in a cylindrical structure, the top of the crosses (15) is rotatably connected to a disc (18), the disc (18) is penetrated by a plurality of arc grooves (19), the plurality of arc grooves (19) are symmetrically distributed around the circumference, and the cross ends of the crosses (15) are slidably connected to a slider (16).

2. A drug experiment sampling device according to claim 1, characterized in that: A clamping plate (17) is fixedly connected to the top of the slider (16), and the connection between the clamping plate (17) and the slider (16) is located at the arc groove (19). The clamping plate (17) is slidably connected to the disk (18), and the disk (18) limits the clamping plate (17). A medicine bottle (6) is clamped and fixed between a plurality of clamping plates (17) located at the top of the disk (18). The hydraulic rod (5) is located between two disks (18), and a gap is provided between the hydraulic rod (5) and the disk (18).

3. A drug experiment sampling device according to claim 2, characterized in that: A gear ring (9) is clamped at the bottom end of the top plate (3), and the gear ring (9) is slidably connected to the top plate (3). The gear ring (9) is transmission-connected to a plurality of driven gears (10). The driven gear (10) connecting shaft is rotatably connected to the top plate (3). The through end of the driven gear (10) connecting shaft is rotatably connected to the cross (15), and the through end of the driven gear (10) connecting shaft is fixedly connected to the disk (18). One of the driven gears (10) is transmission-connected to a driving gear (11) on a side away from the gear ring (9), and the driving gear (11) is rotatably connected to the top plate (3).

4. A sampling device for drug experiments according to claim 3, characterized in that: A second synchronous wheel (13) is rotatably connected at the center of the bottom surface of the top plate (3); a first synchronous wheel (12) is fixedly connected to the side of the driving gear (11) away from the top plate (3); the first synchronous wheel (12) and the second synchronous wheel (13) are connected in transmission via a first synchronous belt (14); a first motor (8) is installed at the center of the top surface of the top plate (3); an output end of the first motor (8) is rotatably connected to the top plate (3); a through end of the first motor (8) is fixedly connected to the second synchronous wheel (13); and the driving gear (11) and the first synchronous belt (14) are located at the notch (2).

5. A sampling device for drug experiments according to claim 1, characterized in that: The fixing plate (4) is provided with a plurality of through holes (20) extending therethrough. The suction sampling mechanism comprises a plurality of sampling tubes (7). The tops of the sampling tubes (7) are open. The sampling tubes (7) are located inside the through holes (20). The sampling tubes (7) are fixedly connected to the fixing plate (4). A fixing frame (21) is fixedly connected to the inner wall of the top end of the sampling tube (7). The top end of the fixing frame (21) is rotatably connected to a third synchronous wheel (22). A threaded rod (24) is threadedly connected therethrough between the fixing frame (21) and the third synchronous wheel (22). The bottom end of the threaded rod (24) is rotatably connected to a connecting frame (27).

6. A sampling device for drug experiments according to claim 5, characterized in that: The connecting frame (27) is arranged in a U-shaped structure, the bottom end of the connecting frame (27) is fixedly connected to a piston plate (28), the center of the piston plate (28) is in a hollow state, and the piston plate (28) is slidably connected to the inner wall of the sampling tube (7), the top surface of the piston plate (28) is hinged to a first cover plate (29), the diameter of the first cover plate (29) is larger than the hollow hole at the center of the piston plate (28), and the bottom end of the sampling tube (7) is hinged to a second cover plate (30), and the hinge direction of the second cover plate (30) is consistent with the hinge direction of the first cover plate (29).

7. A sampling device for drug experiments according to claim 5, characterized in that: The top surface of the fixed plate (4) is rotatably connected to a plurality of fourth synchronous wheels (26); the plurality of fourth synchronous wheels (26) are transmission-connected to the third synchronous wheel (22) via a second synchronous belt (23); the second synchronous belt (23) is arranged in a cross-shaped structure; a second motor (25) is mounted on the bottom surface of the fixed plate (4); an output end of the second motor (25) is rotatably connected to the fixed plate (4); and a through end of the second motor (25) is fixedly connected to one of the fourth synchronous wheels (26).

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