A sample collection device for detecting and analyzing pesticide residues in traditional Chinese medicinal materials

Abstract

The present application relates to the technical field of traditional Chinese medicine sampling, and particularly relates to a sample collection device for pesticide residue detection and analysis of traditional Chinese medicine, which comprises a collection box for collecting traditional Chinese medicine sample liquid, a mixing box for mixing traditional Chinese medicine and detection liquid, a rack with a side wall fixedly connected with a side wall of the collection box, and a bubble removing mechanism comprising a circular groove formed in an upper end of the collection box, a circular ring fixedly connected with an inner wall of the circular groove, an inner side wall of the circular ring fixedly connected with a collection cylinder, and a rotating shaft sealingly and movably connected with a bottom of the collection cylinder. The present application can increase or decrease the space in the suction frame intermittently by sliding the slide plate up and down, and can remove bubbles in the sample liquid in the collection cylinder by suction through the suction pipe and the exhaust pipe, so as to avoid the existence of bubbles from deviating the real value of the pesticide residue concentration in the sample taken out, and to avoid inaccurate detection results.

Description

Technical Field

[0001] This invention relates to the field of sampling technology for Chinese medicinal materials, specifically to a sample collection device for detecting and analyzing pesticide residues in Chinese medicinal materials. Background Technology

[0002] Pesticide spraying during the cultivation of Chinese medicinal herbs can cause pesticide residues in the soil to seep into the tissues of the herbs. Therefore, it is necessary to test the pesticide residue levels in Chinese medicinal herbs. Currently, the mainstream testing methods include spectrophotometry and chromatography.

[0003] When testing Chinese medicinal herbs for pesticide residues, the herbs are usually sliced ​​first, then crushed and mixed with the test solution. This process requires stirring the herbs and test solution, but this method has certain drawbacks: During the slicing and pulverizing process of Chinese medicinal herbs, mechanical shearing forces can damage cell structures, releasing intracellular gases into the sample solution and causing air bubbles to appear. Furthermore, porous herbs (such as Platycodon grandiflorus and Astragalus membranaceus) release even more interstitial gases after pulverization due to their high porosity. Additionally, saponins in these herbs (such as ginsenosides and glycyrrhizin) have surface activity that can encapsulate air bubbles, slowing their collapse and keeping the sample solution turbid and bubbly for an extended period. This can lead to inaccurate pesticide residue concentrations in the sample, especially during trace analysis, as the air bubbles occupy a significant portion of the sample volume, directly resulting in lower-than-expected test results. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art by proposing a sample collection device for the detection and analysis of pesticide residues in Chinese medicinal materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials includes: A collection box is used for collecting sample solutions from Chinese medicinal herbs. A mixing chamber is used to mix Chinese medicinal materials with test solutions; The frame, whose side wall is fixedly connected to the side wall of the data acquisition box; The defoaming mechanism includes a circular groove at the upper end of the collection box, a circular ring fixedly connected to the inner wall of the groove, a collection cylinder fixedly connected to the inner side wall of the circular ring, a rotating shaft sealed and rotatably connected to the bottom of the collection cylinder, an auger blade fixedly connected to the side wall of the rotating shaft, a T-shaped rod fixedly connected to the inner wall of the collection cylinder, the side wall of the rotating shaft and the side wall of the T-shaped rod being sealed and rotatably connected through each other, a piston sealed and slidably connected to the inner wall of the collection cylinder, the side wall of the T-shaped rod and the side wall of the piston being sealed and slidably connected through each other, an air extraction frame fixedly connected to the upper end of the frame, a sliding plate sealed and slidably connected to the inner wall of the air extraction frame, an air extraction pipe fixedly connected to the lower end of the piston through the lower part of the inner wall of the air extraction frame, and an exhaust pipe fixedly connected to the lower part of the inner wall of the air extraction frame.

[0006] Preferably, two vertical plates are fixedly connected to the upper end of the frame, one of which has a motor fixedly connected to its side wall. A U-shaped column is fixedly connected to the output end of the motor, and the side wall of the U-shaped column is rotatably connected to the upper end of the slide plate via a first rotating rod. Preferably, a crossbar is rotatably connected through the other side wall of the vertical plate, a bevel gear one is fixedly connected to the side wall of the crossbar away from the vertical plate, a bevel gear two is fixedly connected to the upper end of the rotating shaft, the bevel gear one and the bevel gear two mesh with each other, and the U-shaped column is fixedly connected to the side wall away from the motor and the end of the crossbar away from the bevel gear one.

[0007] Preferably, the crossbar is provided with a liquid suction mechanism, which includes a one-way bearing. The side wall of the crossbar is fixedly connected to the inner ring side wall of the one-way bearing, and a drive disk is fixedly connected to the outer ring side wall of the one-way bearing. The side wall of the drive disk away from the axis is rotatably connected to the upper end of the piston through a second rotating rod.

[0008] Preferably, a slot is provided below the piston sidewall, and a first cylinder is fixedly connected above the sidewall of the collection box. An L-shaped locking rod that mates with the slot is fixedly connected to the output end of the first cylinder. The sidewall of the L-shaped locking rod passes through the collection box, the ring, and the collection cylinder in sequence.

[0009] Preferably, the bottom of the collection tube is fixedly connected to the inner wall of the mixing tank via a suction pipe, a solenoid valve is installed inside the suction pipe, and a drain pipe is fixedly connected to the inner wall of the circular groove.

[0010] Preferably, the inner wall of the collection cylinder has multiple opening slots, and the inner walls on both sides of the multiple opening slots have arc-shaped slots. The inner walls of two adjacent arc-shaped slots are slidably connected with arc-shaped plates. The side walls of the arc-shaped plates are embedded with filter screens. The inner walls of the multiple opening slots are tightly fitted with arc-shaped cover plates. The side walls of the collection box are fixedly connected with multiple second cylinders that correspond one-to-one with the multiple arc-shaped cover plates. The output end of the second cylinder is fixedly connected to the outer wall of its corresponding arc-shaped cover plate.

[0011] Preferably, a first pipe is fixedly connected to the bottom of one of the arc-shaped grooves corresponding to the arc-shaped plate, and an annular pipe is fixedly connected to the lower ends of multiple first pipes. A pump oil frame is fixedly connected to the bottom of the suction frame, and a T-shaped plate is slidably connected to the inner wall of the pump oil frame. The upper end of the T-shaped plate is fixedly connected to the lower end of the slide plate, and the inner wall of the annular pipe is fixedly connected to the lower part of the inner wall of the pump oil frame through a second pipe.

[0012] Preferably, a through hole is provided on the inner wall of the arc-shaped groove away from the first tube, corresponding to the arc-shaped plate.

[0013] Compared with existing technologies, the advantages of this invention are: 1. A defoaming mechanism is set up. The slide plate moves up and down, causing the space inside the suction frame to increase or decrease intermittently. The suction pipe and exhaust pipe are used to evacuate the collection tube, creating a vacuum inside the collection tube. This removes air bubbles from the sample liquid inside the collection tube, preventing the presence of air bubbles from causing the pesticide residue concentration in the sample to deviate from its true value, resulting in inaccurate test results. In particular, when performing micro-detection, air bubbles occupy the sampling volume, which will directly cause the test results to be lower than expected.

[0014] 2. The reverse rotation of the crossbar drives the rotating shaft to rotate in the forward direction through bevel gear one and bevel gear two, which in turn drives the auger blades to rotate in the forward direction, conveying the sample liquid upward. Since the sample liquid has a high fluidity, some of the sample liquid will also flow downward when it is conveyed upward, causing the sample liquid to collide continuously and accelerate the breaking and removal of air bubbles in the sample liquid.

[0015] 3. When the slide plate moves up and down, it will cause the T-plate to move up and down, so that the hydraulic oil in the pump oil frame circulates in multiple arc-shaped grooves through the first pipe, the annular pipe and the second pipe. This causes the space in the multiple arc-shaped grooves to increase or decrease intermittently, causing multiple arc-shaped plates to slide back and forth, and causing multiple filter screens to slide back and forth. At this time, the filter screen will generate shear force on the sample liquid, accelerating the breaking of bubbles in the sample liquid. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the sample collection device for pesticide residue detection and analysis of Chinese medicinal materials proposed in this invention; Figure 2 for Figure 1 A schematic diagram of the vertical sectional structure; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 for Figure 2 Enlarged structural diagram at point B; Figure 5 This is a schematic diagram of the structure after the collection cylinder and the arc-shaped plate are separated in this invention; Figure 6This is a top sectional view of the data acquisition box in this invention. Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C; Figure 8 This is a schematic diagram of the structure of the arc-shaped plate and the arc-shaped cover plate in this invention; Figure 9 This is a schematic diagram of the vertical cross-sectional structure of the right side of the air extraction frame in this invention; Figure 10 for Figure 9 Enlarged structural diagram at point D; Figure 11 This is a bottom view of the structure of the collection tube in this invention; Figure 12 for Figure 1 A schematic diagram of the rear view structure.

[0017] In the diagram: 1. Collection box; 2. Mixing box; 3. Circular groove; 4. Circular ring; 5. Collection cylinder; 6. Rotating shaft; 7. Screwdriver blade; 8. T-shaped rod; 9. Frame; 10. Vertical plate; 11. Motor; 12. Suction frame; 13. Slide plate; 14. Suction pipe; 15. Exhaust pipe; 16. U-shaped column; 17. First rotating rod; 18. Crossbar; 19. Bevel gear one; 20. Bevel gear two; 21. Piston; 22. One-way bearing ; 23. Drive plate; 24. Second rotating rod; 25. Slot; 26. First cylinder; 27. L-shaped locking rod; 28. Opening slot; 29. ​​Arc-shaped slot; 30. Arc-shaped plate; 31. Filter screen; 32. Arc-shaped cover plate; 33. Second cylinder; 34. Suction pipe; 35. Drain pipe; 36. Solenoid valve; 37. First pipe; 38. Ring pipe; 39. Pump oil frame; 40. T-shaped plate; 41. Second pipe; 42. Through hole. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figures 1-12 A sample collection device for detecting and analyzing pesticide residues in traditional Chinese medicinal materials, comprising: Collection box 1 is used for collecting sample liquid from Chinese medicinal materials; Mixing box 2 is used to mix Chinese medicinal materials with test solutions; The frame 9 has its side wall fixedly connected to the side wall of the data acquisition box 1; The defoaming mechanism includes a circular groove 3 located at the upper end of the collection box 1. A circular ring 4 is fixedly connected to the inner wall of the groove 3. A collection cylinder 5 is fixedly connected to the inner side wall of the ring 4. A rotating shaft 6 is rotatably connected to the bottom of the collection cylinder 5. A screw conveyor blade 7 is fixedly connected to the side wall of the rotating shaft 6. A T-shaped rod 8 is fixedly connected to the inner wall of the collection cylinder 5. The side wall of the rotating shaft 6 and the side wall of the T-shaped rod 8 are rotatably connected through a sealed connection (e.g., Figure 3 As shown), the inner wall of the collection cylinder 5 is sealed and slidably connected to the piston 21. The side wall of the T-shaped rod 8 is sealed and slidably connected to the side wall of the piston 21. The upper end of the frame 9 is fixedly connected to the suction frame 12. The inner wall of the suction frame 12 is sealed and slidably connected to the slide plate 13. The lower part of the inner wall of the suction frame 12 is fixedly connected to the lower end of the piston 21 through the suction pipe 14. The lower part of the inner wall of the suction frame 12 is fixedly connected to the exhaust pipe 15.

[0020] Two vertical plates 10 are fixedly connected to the upper end of the frame 9. A motor 11 is fixedly connected to the side wall of one of the vertical plates 10. A U-shaped column 16 is fixedly connected to the output end of the motor 11. The side wall of the U-shaped column 16 is rotatably connected to the upper end of the slide plate 13 through the first rotating rod 17.

[0021] The rotation of motor 11 drives the U-shaped column 16 to rotate, which in turn drives the slide plate 13 to slide up and down via the first rotating rod 17. It should be noted that the suction pipe 14 only allows gas to enter the suction frame 12 from the collection tube 5, and the exhaust pipe 15 only allows gas to exit from the collection tube 5. Both of these functions can be achieved through one-way valves. As a result, the sliding plate 13 slides up and down, causing the space inside the suction frame 12 to increase or decrease intermittently. By evacuating the collection tube 5 through the suction pipe 14 and the exhaust pipe 15, a vacuum is created inside the collection tube 5, and air bubbles in the sample liquid inside the collection tube 5 are removed. This prevents the presence of air bubbles from causing the pesticide residue concentration in the sample to deviate from its true value, resulting in inaccurate test results. In particular, when performing micro-detection, air bubbles occupy the sampling volume, which will directly cause the test results to be lower than expected.

[0022] Another vertical plate 10 has a horizontal bar 18 rotatably connected through its side wall. A bevel gear 19 is fixedly connected to the side wall of the horizontal bar 18 away from the vertical plate 10. A bevel gear 20 is fixedly connected to the upper end of the rotating shaft 6. The bevel gear 19 and the bevel gear 20 mesh with each other. The U-shaped column 16 is fixedly connected to the side wall away from the motor 11 and to the end of the horizontal bar 18 away from the bevel gear 19.

[0023] A liquid suction mechanism is provided on the crossbar 18. The liquid suction mechanism includes a one-way bearing 22. The side wall of the crossbar 18 is fixedly connected to the inner ring side wall of the one-way bearing 22. A drive disk 23 is fixedly connected to the outer ring side wall of the one-way bearing 22. The side wall of the drive disk 23 away from the axis is rotatably connected to the upper end of the piston 21 through the second rotating rod 24.

[0024] Furthermore, when the crossbar 18 rotates in the forward direction, the inner ring of the one-way bearing 22 drives its outer ring to rotate, which in turn drives the drive disk 23 to rotate. When the crossbar 18 rotates in the reverse direction, the inner ring of the one-way bearing 22 does not drive its inner ring to rotate, and the drive disk 23 does not rotate at this time.

[0025] The bottom of the collection tube 5 is fixedly connected to the inner wall of the mixing box 2 through the suction pipe 34. A solenoid valve 36 is installed in the suction pipe 34, and a drain pipe 35 is fixedly connected to the inner wall of the circular groove 3.

[0026] It should be noted that the suction tube 34 only allows the sample liquid to enter the collection tube 5 from the mixing tank 2, and the drain tube 35 only allows the sample liquid to exit from the circular groove 3. Both can achieve this function through a one-way valve. When the motor 11 rotates in the forward direction and drives the crossbar 18 to rotate in the forward direction through the U-shaped column 16, the one-way bearing 22 drives the drive disk 23 to rotate in the forward direction. The drive disk 23 drives the piston 21 to slide upward through the second rotating rod 24, and absorbs the sample liquid from the mixing tank 2 through the suction tube 34 (at this time, the solenoid valve 36 is energized and opened). The drive disk 23 stops rotating after rotating half a turn, and then the solenoid valve 36 is de-energized and closed. Subsequently, motor 11 rotates in the reverse direction. At this time, one-way bearing 22 does not drive drive disk 23 to rotate. At this time, vacuum frame 12 can evacuate air from collection cylinder 5 through vacuum pipe 14 and exhaust pipe 15 to create a vacuum in collection cylinder 5. At the same time, crossbar 18 drives rotating shaft 6 to rotate in the forward direction through bevel gear 19 and bevel gear 20, which in turn drives auger blade 7 to rotate in the forward direction, conveying the sample liquid upward. Since the sample liquid has high fluidity, when the sample liquid is conveyed upward, some of the sample liquid will also flow downward, causing continuous collisions between sample liquids, accelerating the breaking and removal of air bubbles in the sample liquid. At the same time, the rotation of auger blade 7 will generate shear force, which will further break and remove air bubbles.

[0027] A slot 25 is provided on the lower side wall of piston 21, and a first cylinder 26 is fixedly connected to the upper side wall of collection box 1. An L-shaped locking rod 27 that cooperates with the slot 25 is fixedly connected to the output end of the first cylinder 26. The side wall of the L-shaped locking rod 27 passes through the collection box 1, the ring 4 and the collection cylinder 5 in sequence.

[0028] When the drive disc 23 stops rotating after rotating half a turn, the piston 21 moves upward so that the slot 25 is aligned with the L-shaped lever 27. Then, the first cylinder 26 is adjusted to retract, which drives the L-shaped lever 27 to move into the slot 25, thus limiting the position of the piston 21.

[0029] The inner wall of the collection cylinder 5 has multiple opening slots 28 (such as... Figure 5As shown), multiple opening slots 28 have arc-shaped grooves 29 on both sides of their inner walls. The inner walls of two adjacent arc-shaped grooves 29 are slidably connected to an arc-shaped plate 30. A filter screen 31 is embedded in the side wall of the arc-shaped plate 30. Arc-shaped cover plates 32 are tightly fitted to the inner walls of multiple opening slots 28 (furthermore, the side wall of the arc-shaped cover plate 32 is provided with a sealing gasket to increase the sealing between the side wall of the arc-shaped cover plate 32 and the inner wall of the opening slot 28). Multiple second cylinders 33, corresponding one-to-one with the multiple arc-shaped cover plates 32, are fixedly connected to the side wall of the collection box 1. The output end of the second cylinder 33 is fixedly connected to the outer side wall of its corresponding arc-shaped cover plate 32.

[0030] When it is necessary to discharge the sample liquid, firstly, adjust the retraction of multiple second cylinders 33 so that multiple arc-shaped cover plates 32 move out of multiple opening slots 28 respectively. Then, adjust the extension of the first cylinder 26 so that the L-shaped clamp 27 separates from the clamp slot 25. Then, drive the motor 11 to rotate forward again so that the drive disk 23 rotates forward again. At this time, the drive disk 23 will drive the piston 21 to move downward through the second rotating rod 24, squeezing the sample liquid in the collection cylinder 5 through multiple filters 31. At this time, the multiple filters 31 can break and remove air bubbles in the sample liquid again, increasing the detection accuracy of the sample liquid.

[0031] The bottom of one of the arc grooves 29 corresponding to the arc plate 30 is fixedly connected to the first pipe 37 (e.g., Figure 7 As shown), the lower ends of multiple first pipes 37 are fixedly connected to an annular pipe 38. The bottom of the suction frame 12 is fixedly connected to a pump oil frame 39. The inner wall of the pump oil frame 39 is sealed and slidably connected to a T-shaped plate 40. The upper end of the T-shaped plate 40 is fixedly connected to the lower end of the slide plate 13. The inner wall of the annular pipe 38 is fixedly connected to the lower part of the inner wall of the pump oil frame 39 through a second pipe 41.

[0032] A through hole 42 is provided on the inner wall of the arc groove 29, which is away from the first tube 37 and corresponds to the arc plate 30, to balance the pressure change in the arc groove 29 away from the first tube 37 when the arc plate 30 slides.

[0033] When the slide plate 13 slides up and down, it will drive the T-shaped plate 40 to slide up and down, so that the hydraulic oil in the pump oil frame 39 circulates in multiple arc-shaped grooves 29 through the first pipe 37, the annular pipe 38 and the second pipe 41. This causes the space in the multiple arc-shaped grooves 29 to increase or decrease intermittently, driving the multiple arc-shaped plates 30 to slide back and forth, and driving the multiple filter screens 31 to slide back and forth. At this time, the filter screens 31 will generate shear force on the sample liquid, accelerating the breakage of bubbles in the sample liquid. At the same time, for the tiny bubbles wrapped by saponins, this external force can break the elastic balance of the bubble liquid film, causing small bubbles to merge into large bubbles. The large bubbles have stronger buoyancy and are easier to float and dissipate.

[0034] In this invention, the sample solution after the Chinese medicinal materials are sliced ​​and mixed with the test solution is located in the mixing tank 2. When the sample solution needs to be collected, the drive motor 11 rotates in the forward direction. When the motor 11 rotates in the forward direction, it drives the crossbar 18 to rotate in the forward direction through the U-shaped column 16. The one-way bearing 22 drives the drive disk 23 to rotate in the forward direction. The drive disk 23 drives the piston 21 to slide upward through the second rotating rod 24. The sample solution is absorbed from the mixing tank 2 through the suction tube 34 (at this time, the solenoid valve 36 is energized and opened). The drive disk 23 stops rotating after rotating half a turn, and then the solenoid valve 36 is de-energized and closed. At this time, the piston 21 moves upward so that the slot 25 is aligned with the L-shaped lever 27. Then, the first cylinder 26 is adjusted to retract, which drives the L-shaped lever 27 to move into the slot 25, thus limiting the position of the piston 21. Subsequently, the motor 11 rotates in the reverse direction. At this time, the one-way bearing 22 does not drive the drive disk 23 to rotate. The rotation of the motor 11 drives the U-shaped column 16 to rotate, which drives the slide plate 13 to slide up and down through the first rotating rod 17. This causes the space inside the suction frame 12 to increase or decrease intermittently. The suction pipe 14 and the exhaust pipe 15 are used to evacuate the collection tube 5 and perform vacuum treatment inside the collection tube 5. This removes air bubbles from the sample liquid inside the collection tube 5, preventing the presence of air bubbles from causing the pesticide residue concentration in the sample to deviate from its true value, resulting in inaccurate test results. In particular, when performing trace detection, air bubbles occupy the sampling volume, which will directly cause the test results to be lower. At the same time, the crossbar 18 rotates in the opposite direction, which drives the rotating shaft 6 to rotate in the forward direction through bevel gear 19 and bevel gear 20, which in turn drives the auger blade 7 to rotate in the forward direction, thus conveying the sample liquid upward. Since the sample liquid has a large fluidity, when the sample liquid is conveyed upward, some of the sample liquid will also flow downward, causing the sample liquid to collide continuously and accelerate the breaking and removal of air bubbles in the sample liquid. When the slide plate 13 slides up and down, it will drive the T-shaped plate 40 to slide up and down, so that the hydraulic oil in the pump oil frame 39 circulates in multiple arc-shaped grooves 29 through the first pipe 37, the annular pipe 38 and the second pipe 41, causing the space in the multiple arc-shaped grooves 29 to increase or decrease intermittently, driving the multiple arc-shaped plates 30 to slide back and forth, and driving the multiple filter screens 31 to slide back and forth. At this time, the filter screens 31 will generate shear force on the sample liquid, accelerating the breaking of bubbles in the sample liquid; When it is necessary to discharge the sample liquid, firstly, adjust the retraction of multiple second cylinders 33 so that multiple arc-shaped cover plates 32 move out of multiple opening slots 28 respectively. Then, adjust the extension of the first cylinder 26 so that the L-shaped locking rod 27 separates from the locking slot 25. Then, drive the motor 11 to rotate forward again so that the drive disk 23 rotates forward again. At this time, the drive disk 23 will drive the piston 21 to move downward through the second rotating rod 24, squeezing the sample liquid in the collection cylinder 5 through multiple filters 31. At this time, the multiple filters 31 can break and remove air bubbles in the sample liquid again, increasing the accuracy of the sample liquid detection. Then, the sample liquid after removing air bubbles flows out through the drain pipe 35 and can be collected for detection.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A sample collection device for detecting and analyzing pesticide residues in traditional Chinese medicinal materials, characterized in that, include: Collection box (1) is used for collecting sample liquid of Chinese medicinal materials; Mixing box (2) is used to mix Chinese medicinal materials with test solution; The frame (9) has its side wall fixedly connected to the side wall of the data acquisition box (1); The defoaming mechanism includes a circular groove (3) at the upper end of the collection box (1), a circular ring (4) fixedly connected to the inner wall of the circular groove (3), a collection cylinder (5) fixedly connected to the inner side wall of the circular ring (4), a rotating shaft (6) rotatably connected to the bottom of the collection cylinder (5), a screw conveyor blade (7) fixedly connected to the side wall of the rotating shaft (6), and a T-shaped rod (8) fixedly connected to the inner wall of the collection cylinder (5). The side wall of the rotating shaft (6) and the side wall of the T-shaped rod (8) pass through and seal each other. The inner wall of the collection tube (5) is sealed and slidably connected to a piston (21). The side wall of the T-shaped rod (8) is sealed and slidably connected to the side wall of the piston (21). The upper end of the frame (9) is fixedly connected to an air extraction frame (12). The inner wall of the air extraction frame (12) is sealed and slidably connected to a sliding plate (13). The lower part of the inner wall of the air extraction frame (12) is fixedly connected to the lower end of the piston (21) through an air extraction pipe (14). The lower part of the inner wall of the air extraction frame (12) is fixedly connected to an exhaust pipe (15).

2. The sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 1, characterized in that, Two vertical plates (10) are fixedly connected to the upper end of the frame (9). A motor (11) is fixedly connected to the side wall of one of the vertical plates (10). A U-shaped column (16) is fixedly connected to the output end of the motor (11). The side wall of the U-shaped column (16) is rotatably connected to the upper end of the slide plate (13) through a first rotating rod (17).

3. The sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 2, characterized in that, Another vertical plate (10) has a horizontal bar (18) rotatably connected through its side wall. A bevel gear (19) is fixedly connected to the side wall of the horizontal bar (18) away from the vertical plate (10). A bevel gear (20) is fixedly connected to the upper end of the rotating shaft (6). The bevel gear (19) and the bevel gear (20) mesh with each other. The side wall of the U-shaped column (16) away from the motor (11) is fixedly connected to the end of the horizontal bar (18) away from the bevel gear (19).

4. The sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 3, characterized in that, The crossbar (18) is provided with a liquid suction mechanism, which includes a one-way bearing (22). The side wall of the crossbar (18) is fixedly connected to the inner ring side wall of the one-way bearing (22). The outer ring side wall of the one-way bearing (22) is fixedly connected to a drive disk (23). The side wall of the drive disk (23) away from the axis is rotatably connected to the upper end of the piston (21) through a second rotating rod (24).

5. The sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 1, characterized in that, The piston (21) has a slot (25) on its lower side wall. The first cylinder (26) is fixedly connected to the upper side wall of the collection box (1). The output end of the first cylinder (26) is fixedly connected to an L-shaped rod (27) that cooperates with the slot (25). The side wall of the L-shaped rod (27) passes through the collection box (1), the ring (4), and the collection cylinder (5) in sequence.

6. The sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 1, characterized in that, The bottom of the collection tube (5) is fixedly connected to the inner wall of the mixing box (2) through the suction tube (34). A solenoid valve (36) is installed in the suction tube (34). A drain tube (35) is fixedly connected to the inner wall of the circular groove (3).

7. The sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 1, characterized in that, The inner wall of the collection tube (5) is provided with multiple opening slots (28), and the inner walls on both sides of the multiple opening slots (28) are provided with arc-shaped slots (29). The inner walls of two adjacent arc-shaped slots (29) are sealed and slidably connected with arc-shaped plates (30). The side walls of the arc-shaped plates (30) are embedded with filter screens (31). The inner walls of the multiple opening slots (28) are tightly fitted with arc-shaped cover plates (32). The side walls of the collection box (1) are fixedly connected with multiple second cylinders (33) that correspond one-to-one with the multiple arc-shaped cover plates (32). The output end of the second cylinder (33) is fixedly connected to the outer side wall of its corresponding arc-shaped cover plate (32).

8. The sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 7, characterized in that, A first pipe (37) is fixedly connected to the bottom of one of the arc grooves (29) corresponding to the arc plate (30). The lower ends of multiple first pipes (37) are fixedly connected to an annular pipe (38). A pump oil frame (39) is fixedly connected to the bottom of the suction frame (12). A T-shaped plate (40) is slidably connected to the inner wall of the pump oil frame (39). The upper end of the T-shaped plate (40) is fixedly connected to the lower end of the slide plate (13). The inner wall of the annular pipe (38) is fixedly connected to the lower part of the inner wall of the pump oil frame (39) through a second pipe (41).

9. A sample collection device for pesticide residue detection and analysis of traditional Chinese medicinal materials according to claim 8, characterized in that, A through hole (42) is provided on the inner wall of the arc groove (29) that is away from the first tube (37) and corresponds to the arc plate (30).

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