Food microorganism detection method

Abstract

The invention relates to the technical field of food detection, in particular to a food microorganism detection method which comprises the following steps: baking and sterilizing the outer surface of a sample; sampling a plurality of parts of the disinfected to-be-detected meat sample by using sampling equipment, cutting off a part of the top and the bottom of each sample, leaving a middle part, and marking and cryopreserving the samples at different parts; placing each sample into different culture media to be cultured for three days; the total number of bacterial colonies in different culture media is observed and recorded. The multiple material taking frames are arranged below the movable frame, the material distributing assemblies are arranged in the material taking frames, different parts of a sample are sampled firstly, then the tool rest is used for conducting secondary treatment on the taken sample, the top and the bottom are removed, manual material taking is replaced, the material distributing assemblies are disinfected and air-dried after material feeding is completed, and the material taking efficiency is improved. The detection precision is improved, and subsequent continuous detection is also facilitated.

Description

Technical Field

[0001] This invention relates to the field of food testing technology, and more specifically to a method for detecting microorganisms in food. Background Technology

[0002] Food microbiological testing is a testing method that uses the theories and methods of microbiology to examine the types, quantities, properties, and effects on human health of microorganisms in food in order to determine whether the food meets quality standards.

[0003] While existing food packaging is largely automated, sampling and testing of ready-to-eat foods (such as dried meat and jerky) are still required during production or packaging. Current technology still relies on manual sampling. To ensure sample diversity and accuracy, workers need to sample multiple parts of the same product (e.g., dried meat and jerky), requiring different sampling tools each time, or disinfection after each sampling. This results in low testing efficiency. Furthermore, due to the automation of packaging, if microbial testing of the food cannot be performed promptly, the automated packaging line will be idle until the test results are available. Prolonged downtime reduces actual production efficiency and causes losses for the company. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a food microbial detection method, which can effectively solve the problem of inconvenient sampling in the food detection process of the existing technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a method for detecting microorganisms in food, comprising the following steps: S1: Sterilize the outer surface of the sample by roasting it with fire; S2: Using sampling equipment, take samples from multiple parts of the disinfected meat sample to be tested, cut off a portion from the top and bottom of each sample, leaving the middle part, and mark the samples from different parts, and freeze them for preservation. S3: Place each sample in a different culture medium and incubate for three days; S4: Observe the total number of bacterial colonies in different culture media and record them.

[0006] Furthermore, the device includes a material picking platform, a receiving platform on one side of the material picking platform, a slide frame above the material picking platform, a movable frame slidably mounted on the slide frame, a driving component for driving the movable frame to slide, multiple material picking frames fixedly mounted on the movable frame, and a receiving platform containing the same number of receiving boxes as the material picking frames. Each material picking frame is provided with a first electric push rod, the output end of the first electric push rod is provided with a material distributing component, the material distributing component includes a first distributing ring mounted on the output end of the first electric push rod, a second distributing ring slidably mounted on the bottom of the first distributing ring, and a third distributing ring slidably mounted on the top of the first distributing ring. A knife holder is slidably mounted in the material picking frame, the knife holder includes two cutting blades, and each of the two cutting blades is provided with a push plate. Moving the knife holder causes the second and third distributing rings to slide along the first distributing ring. The disinfection assembly includes a top plate mounted on the top wall of a third distribution ring. A first piston tube is mounted on the top wall of the top plate. A first piston rod is movably inserted into the bottom wall of the first piston tube, and the first piston rod movably penetrates the top plate. A first return spring is provided between the first piston rod and the first piston tube. An air box is fixedly mounted at the bottom end of the first piston rod, and a through hole is provided in the first piston rod for connecting the air box and the first piston tube. Multiple air blowing holes are provided on the side wall of the air box, and one-way valves are provided on the air blowing holes. An annular tube is provided on the side wall of the air box, and the annular tube is located below the air blowing holes. A disinfection tube is provided on the top plate. The disinfection tube is equipped with a piston disc, and a second return spring is connected between the piston disc and the inner top wall of the disinfection tube. A pressure box is provided on the top wall of the first piston tube, and the first piston tube and the pressure box are connected and a one-way valve is provided at the connection. A connecting pipe is connected between the pressure box and the disinfection tube, and a solenoid valve is provided on the connecting pipe. A first outlet pipe is connected between the disinfection tube and the annular tube. A storage tank is provided on the material picker, and the storage tank contains disinfectant alcohol. A first inlet pipe is connected between the disinfection tube and the storage tank, and a one-way valve is provided on both the first outlet pipe and the first inlet pipe. An adjustment component is provided on one side of the first piston tube.

[0007] Furthermore, a first connecting plate is provided on one side of the tool holder, and a second electric push rod for driving the first connecting plate to move is fixedly installed on one side of the material picker.

[0008] Furthermore, the disinfection assembly also includes a disinfection rack fixedly installed on the inner wall of the material picker. The disinfection rack has multiple nozzles on both its upper and lower sides, and the thickness of the disinfection rack is slightly less than the thickness of the first material distribution ring. A third piston tube is provided on one side of the material picker, and a second connecting plate is installed on one side of the knife holder. A third piston rod is movably inserted into the third piston tube, and the end of the third piston rod away from the third piston tube is installed on the second connecting plate. A second liquid outlet pipe is connected between the third piston tube and the disinfection rack, and a second liquid inlet pipe is connected between the third piston tube and the liquid storage tank.

[0009] Furthermore, the bottom wall of the air box is provided with multiple suction nozzles, and each suction nozzle is provided with a one-way valve. The side wall of the top plate is provided with a discharge hole, and the top wall of the material picker is provided with a right-angle plate that matches the discharge hole.

[0010] Furthermore, the adjustment assembly includes a second piston tube disposed on the side of the first piston tube near the tool holder. A second piston rod is movably inserted into the top end of the second piston tube. The second piston tube and the first piston tube are connected. When the first piston rod moves upward, the second piston rod moves upward. A pressure plate is rotatably mounted on the top end of the second piston rod, and a torsion spring is provided at the rotatable mounting point. A fixed frame is provided on the first electric push rod, and a sliding plate is slidably mounted on the fixed frame. A first pressure switch for controlling the solenoid valve is provided above the first piston tube. When the second piston rod moves upward, it pushes the sliding plate to slide upward. When the second piston rod moves horizontally toward the sliding plate, the pressure plate turns toward the first pressure switch.

[0011] Furthermore, a first electromagnet is provided on the inner top wall of the first piston tube, and a metal sheet is provided on the top wall of the first piston rod. When the first electromagnet is energized, it attracts the metal sheet. The first electromagnet is controlled by a first pressure switch.

[0012] Furthermore, a second pressure switch is provided on the side of the tool holder away from the first material distribution ring, a second electromagnet is provided on the inner wall of the material picker, and permanent magnets are provided on the second and third material distribution rings, and the second electromagnet repels the permanent magnets when energized.

[0013] Beneficial effects

[0014] The technical solution provided by this invention has the following advantages compared with the known prior art: This invention features multiple material picking racks located below the moving frame, each equipped with a material dispensing component. The system first samples different parts of the sample, then uses a blade holder to perform secondary processing, removing the top and bottom parts. This replaces manual material picking. Furthermore, the material dispensing component is sterilized and dried after feeding, improving testing accuracy and facilitating subsequent continuous testing. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is a schematic diagram of the material handling rack in this invention; Figure 3 This is a schematic diagram of the material distribution ring and the tool holder in this invention; Figure 4 This is a schematic diagram of the state of the air box when the first piston rod moves upward in this invention; Figure 5 This is a schematic diagram of the state of the air box when the first piston rod moves downward in this invention; Figure 6 This is a cross-sectional view of the first piston tube and the sterilization tube in this invention; Figure 7 This is a schematic diagram of the structure of the adjustment component in this invention; Figure 8 This is a diagram showing the state of the second piston rod moving upwards in this invention; Figure 9 This is a diagram showing the state of the second piston rod during horizontal movement in this invention. Figure 10 This is a flowchart of the detection method in this invention.

[0017] The labels in the diagram represent: 1. Picking platform; 2. Receiving platform; 3. Receiving box; 4. Slide; 5. Moving frame; 6. Picking frame; 7. First electric push rod; 8. Distributing assembly; 801. First distributing ring; 802. Second distributing ring; 803. Third distributing ring; 804. Top plate; 9. First piston tube; 10. Tool holder; 11. First connecting plate; 12. Second electric push rod; 13. First piston rod; 14. First return spring; 15. Air box; 16. Suction nozzle; 17. Through hole; 18. Air blowing hole; 19. First electromagnet; 20. Metal sheet; 21. 1. Disinfection tube; 22. Piston plate; 23. Second return spring; 24. Pressure box; 25. Connecting pipe; 26. First inlet pipe; 27. First outlet pipe; 28. Ring pipe; 29. ​​Discharge hole; 30. Second piston tube; 31. Second piston rod; 32. Pressure plate; 33. Fixing frame; 34. Slide plate; 35. First pressure switch; 36. Third piston tube; 37. Third piston rod; 38. Second connecting plate; 39. Disinfection rack; 40. Second inlet pipe; 41. Second inlet pipe; 42. Second pressure switch; 43. Storage tank; 44. Right angle plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] The present invention will be further described below with reference to embodiments.

[0020] Example: A method for detecting microorganisms in food, comprising the following steps: S1: Sterilize the outer surface of the sample by roasting it with fire; S2: Using sampling equipment, take samples from multiple parts of the disinfected meat sample to be tested, cut off a portion from the top and bottom of each sample, leaving the middle part, and mark the samples from different parts, and freeze them for preservation. S3: Place each sample in a different culture medium and incubate for three days; S4: Observe the total number of bacterial colonies in different culture media and record them.

[0021] refer to Figures 1-10The material handling platform 1 has a receiving platform 2 on one side. A slide 4 is positioned above the material handling platform 1, and a movable frame 5 is slidably mounted on the slide 4. The slide 4 has a driving component for sliding the movable frame 5. Multiple material handling frames 6 are fixedly mounted on the movable frame 5, and the receiving platform 2 holds the same number of receiving boxes 3 as the material handling frames 6. Each material handling frame 6 has a first electric push rod 7. The output end of the first electric push rod 7 has a distributing assembly 8. The distributing assembly 8 includes a first distributing ring 801 installed at the output end of the first electric push rod 7, a second distributing ring 802 slidably mounted at the bottom of the first distributing ring 801, and a third distributing ring 803 slidably mounted at the top of the first distributing ring 801. A knife holder 10 is slidably mounted in the material handling frame 6, and a first connecting plate 11 is provided on one side of the knife holder 10. A second electric push rod 12 for driving the first connecting plate 11 to move is fixedly installed on one side of the material rack 6. The knife holder 10 includes two cutters, and each cutter is equipped with a push plate. Moving the knife holder 10 causes the second material distribution ring 802 and the third material distribution ring 803 to slide along the first material distribution ring 801. A second pressure switch 42 is provided on the side of the knife holder 10 away from the first material distribution ring 801. A second electromagnet is provided on the inner wall of the material picker 6. Permanent magnets are provided on the second material distribution ring 802 and the third material distribution ring 803. When the second electromagnet is energized, it repels the permanent magnets. Multiple suction nozzles 16 are provided on the bottom wall of the air box 15. One-way valves are provided on the suction nozzles 16. A discharge hole 29 is provided on the side wall of the top plate 804. A right-angle plate 44 matching the discharge hole 29 is provided on the top wall of the material picker 6.

[0022] To quickly remove the top and bottom of the meat sample, this solution includes a sliding frame 5 mounted above the picking platform 1 and the receiving platform 2. Multiple picking racks 6 are mounted on the sliding frame 5, each capable of sampling different parts of the sample placed on the picking platform 1. Figure 1 As shown in the figure, this scheme sets up three material picking racks 6, which are arranged in a straight line at equal intervals. However, the specific number and arrangement are not limited to this and can be adjusted according to the specific situation.

[0023] The specific material handling steps are as follows: The first electric push rod 7 drives the first distributing ring 801 to move down. The first distributing ring 801 carries the second distributing ring 802 and the third distributing ring 803. As shown in the figure, the bottom wall of the second distributing ring 802 is inclined, which can cut off the sample on the material handling platform 1. At this time, the cut sample is in the shape of a strip. During this process, the top of the meat raw material that has been disinfected will pressurize the air box 15. The air box 15 drives the first piston rod 13 to move up. When the first piston rod 13 moves up, the space in the lower half of the first piston tube 9 increases. At this time, the suction nozzle 16 is blocked by the sample, and the gas cannot enter the through hole 17 through the suction nozzle 16. This makes the air box 15 and the lower half of the first piston tube 9 in a negative pressure state. The suction nozzle 16 uses the negative pressure state to suck up the cut strip sample, which makes it convenient to take away the sample cut off by the second distributing ring 802 and bring it to the material handling rack 6. At this time, the second electric actuator 12 is activated, which drives the first connecting plate 11 to slide. The first connecting plate 11 drives the cutter holder 10 to move towards the first dividing ring 801. The two cutters on the cutter holder 10 cut towards the sliding connection points of the first dividing ring 801, the second dividing ring 802, and the third dividing ring 803, respectively. The cutters are equipped with push plates, which push away the second dividing ring 802 and the third dividing ring 803 during the cutting process, thus causing the second dividing ring 802 and the third dividing ring 803 to... The first dispensing ring 801 is misaligned. It is worth noting that the second dispensing ring 802 and the third dispensing ring 803 correspond to the bottom and top useless parts of the strip sample, respectively. The useless waste in the second dispensing ring 802 falls back onto the picking platform 1, while the useless waste in the third dispensing ring 803 is sucked up by the suction nozzle 16. At this time, the top plate 804 moves with the third dispensing ring 803, so that the right-angle plate 44 enters the discharge hole 29, scrapes off the waste adsorbed on the suction nozzle 16, and makes it fall onto the picking platform 1.

[0024] It is worth noting that when the tool holder 10 is distributing materials, the second distributing ring 802 and the third distributing ring 803 move toward the inner wall of the material picker 6. At this time, the permanent magnet will be attracted to the second electromagnet because the second pressure switch 42 is not pressed while moving with the tool holder 10.

[0025] It is worth noting that after the blade holder 10 has finished cutting, the blade holder 10 remains stationary. On the one hand, the surfaces of the two blades on their adjacent sides and the first separating ring 801 can be used to wrap the useful sample to prevent it from being contaminated. The sample is then moved to the receiving platform 2 using the moving frame 5. The blade holder 10 is then reset using the second electric push rod 12. After the blade holder 10 is fully reset, the second pressure switch 42 is pressed, and the second electromagnet is activated to help the second separating ring 802 and the third separating ring 803 reset through the repulsive force between the electromagnet and the permanent magnet. Before this, the useful sample that was separated from the first separating ring 801 has fallen into the corresponding receiving box 3.

[0026] refer to Figures 1-10The disinfection assembly includes a top plate 804 mounted on the top wall of the third distributing ring 803. A first piston tube 9 is provided on the top wall of the top plate 804. A first piston rod 13 is movably inserted into the bottom wall of the first piston tube 9, and the first piston rod 13 movably penetrates the top plate 804. A first electromagnet 19 is provided on the inner top wall of the first piston tube 9. A metal sheet 20 is provided on the top wall of the first piston rod 13. When the first electromagnet 19 is energized, it attracts the metal sheet 20. The first electromagnet 19 is controlled by a first pressure switch 35. A first return spring 14 is provided between the first piston rod 13 and the first piston tube 9. An air box 15 is fixedly installed at the bottom end, and a through hole 17 for connecting the air box 15 and the first piston tube 9 is provided in the first piston rod 13. Multiple air blowing holes 18 are provided on the side wall of the air box 15, and a one-way valve is provided on each air blowing hole 18. An annular tube 28 is provided on the side wall of the air box 15, and the annular tube 28 is located below the air blowing holes 18. A sterilization tube 21 is provided on the top plate 804, and a piston plate 22 is provided in the sterilization tube 21. A second return spring 23 is connected between the piston plate 22 and the inner top wall of the sterilization tube 21. A pressure box 24 is provided on the top wall of the first piston tube 9. The first piston tube 9 and the pressure box 24... The components are interconnected, with a one-way valve at the connection point. A connecting pipe 25 connects the pressure tank 24 and the disinfection pipe 21, and a solenoid valve is installed on the connecting pipe 25. A first outlet pipe 27 connects the disinfection pipe 21 and the annular pipe 28. A storage tank 43 is installed on the material rack 6, and the storage tank 43 contains disinfectant alcohol. A first inlet pipe 26 connects the disinfection pipe 21 and the storage tank 43, and both the first outlet pipe 27 and the first inlet pipe 26 are equipped with one-way valves. An adjustment assembly is installed on one side of the first piston pipe 9. The adjustment assembly includes a second piston pipe 30 located on the side of the first piston pipe 9 near the knife holder 10. A second piston rod 31 is movably inserted at the top of the plug tube 30. The second piston tube 30 is connected to the first piston tube 9. When the first piston rod 13 moves upward, the second piston rod 31 moves upward. A pressure plate 32 is rotatably mounted at the top of the second piston rod 31, and a torsion spring is provided at the rotatable mounting point. A fixing bracket 33 is provided on the first electric push rod 7, and a sliding plate 34 is slidably mounted on the fixing bracket 33. A first pressure switch 35 for controlling the solenoid valve is provided above the first piston tube 9. When the second piston rod 31 moves upward, it pushes the sliding plate 34 to slide upward. When the second piston rod 31 moves horizontally toward the sliding plate 34, the pressure plate 32 turns toward the first pressure switch 35.

[0027] To facilitate the disinfection of each component after one sampling and to enable rapid sampling of the next sample, this solution includes a disinfection component, such as... Figure 4 and Figure 8As shown, after the first piston rod 13 moves upward, the first electromagnet 19 will attract the metal plate 20 on the first piston rod 13. At this time, the air pressure at the bottom of the second piston tube 30 increases, the second piston rod 31 moves upward, and the pressure plate 32 moves upward. When the first material distribution ring 801 moves downward for the first time and returns, because the pressure plate 32 has moved upward, the pressure plate 32 will push the slide plate 34 upward. The slide plate 34 moves upward. When the cutter holder 10 cuts, the second material distribution ring 802, the third material distribution ring 803, the top plate 804, and the first piston tube 9 move horizontally. Then, when the second material distribution ring 802 and the third material distribution ring 803 reset, the pressure plate 32 moves towards the slide plate 34 in a translational manner. Figure 9 As shown, the slide plate 34 pushes the pressure plate 32 against the first pressure switch 35, triggering the first pressure switch 35 and activating the solenoid valve. Figure 6 As shown, when the first piston rod 13 moves upward, the air in the upper half of the first piston tube 9 enters the pressurization box 24. When the solenoid valve is activated, the high-pressure gas enters the disinfection tube 21 through the connecting pipe 25. The piston disc 22 pushes the disinfectant alcohol inside the disinfection tube 21 from the first outlet pipe 27 into the annular tube 28. The outer wall of the annular tube 28 is provided with multiple nozzles. At this time, the first electromagnet 19 is closed, the magnetic force disappears, and the first reset spring 14 pushes the first piston rod 13 to move downward and reset, thereby driving the nozzles to move downward to disinfect and rinse the inner walls of the third distribution ring 803, the first distribution ring 801, and the second distribution ring 802 in sequence. When the first piston rod 13 moves downward, the space in the lower half of the first piston tube 9 decreases, blowing the internal air out from the air blowing hole 18 to accelerate the drying of the alcohol. It is worth noting that the air blowing hole 18 is located above the annular tube 28, so that the disinfection can be rinsed first and then dried.

[0028] In addition, after the internal disinfectant alcohol is sprayed, the piston plate 22 moves upward under the elastic force of the second return spring 23, and draws the disinfectant alcohol from the storage tank 43 through the first liquid inlet pipe 26.

[0029] refer to Figures 1-10 The disinfection assembly also includes a disinfection rack 39 fixedly installed on the inner wall of the material picker 6. The disinfection rack 39 has multiple nozzles on both its upper and lower sides, and the thickness of the disinfection rack 39 is slightly less than the thickness of the first material distribution ring 801. A third piston tube 36 is provided on one side of the material picker 6, and a second connecting plate 38 is installed on one side of the knife holder 10. A third piston rod 37 is movably inserted into the third piston tube 36, and the end of the third piston rod 37 away from the third piston tube 36 is installed on the second connecting plate 38. A second liquid outlet pipe 40 is connected between the third piston tube 36 and the disinfection rack 39, and a second liquid inlet pipe 41 is connected between the third piston tube 36 and the liquid storage tank 43.

[0030] It is worth noting that since the second and third distributing rings 802 and 803 are slidably installed with the first distributing ring 801, in order to further improve the detection accuracy, this solution also sets two disinfection racks 39 in the material handling rack 6. When the second and third distributing rings 802 and 803 slide and separate from the first distributing ring 801, that is, when the third piston rod 37 enters the third piston tube 36, the third piston tube 36 uses the second inlet pipe 41 to draw disinfectant alcohol from the storage tank 43. When the second and third distributing rings 802 and 803 reset, the third piston rod 37 moves out of the third piston tube 36, and the disinfectant alcohol in the third piston tube 36 enters the two disinfection racks 39 through the second outlet pipe 40. The disinfectant alcohol sprayed by the disinfection racks 39 will disinfect and rinse the sliding connection of the sliding second distributing ring 802 and the third distributing ring 803 to prevent food residues from remaining inside, thereby improving the detection accuracy and facilitating subsequent detection.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting microorganisms in food, characterized in that, Includes the following steps: S1: Sterilize the outer surface of the sample by roasting it with fire; S2: Using sampling equipment, take samples from multiple parts of the disinfected meat sample to be tested, cut off a portion from the top and bottom of each sample, leaving the middle part, and mark the samples from different parts, and freeze them for preservation. S3: Place each sample in a different culture medium and incubate for three days; S4: Observe the total number of bacterial colonies in different culture media and record them.

2. A sampling device, applied to the food microbial detection method as described in claim 1, characterized in that, The system includes a material picking platform (1), a receiving platform (2) on one side of the material picking platform (1), a slide (4) above the material picking platform (1), a movable frame (5) slidably mounted on the slide (4), a driving component for driving the movable frame (5) to slide on the slide (4), a plurality of material picking racks (6) fixedly mounted on the movable frame (5), and a receiving platform (2) containing the same number of receiving boxes (3) as the material picking racks (6). Each material picking rack (6) is provided with a first electric push rod (7), and the output end of the first electric push rod (7) is provided with a material dispensing component (8). The material distribution assembly (8) includes a first material distribution ring (801) installed at the output end of the first electric push rod (7), a second material distribution ring (802) slidably installed at the bottom of the first material distribution ring (801), and a third material distribution ring (803) slidably installed at the top of the first material distribution ring (801). A knife holder (10) is slidably installed in the material picker (6). The knife holder (10) includes two cutters, and each cutter is provided with a push plate. Moving the knife holder (10) causes the second material distribution ring (802) and the third material distribution ring (803) to slide along the first material distribution ring (801). The disinfection assembly includes a top plate (804) installed on the top wall of the third distribution ring (803). A first piston tube (9) is provided on the top wall of the top plate (804). A first piston rod (13) is movably inserted into the bottom wall of the first piston tube (9) and the first piston rod (13) movably passes through the top plate (804). A first return spring (14) is provided between the first piston rod (13) and the first piston tube (9). An air box (15) is fixedly installed at the bottom end of the first piston rod (13). A through hole (17) for connecting the air box (15) and the first piston tube (9) is provided in the first piston rod (13). A plurality of air blowing holes (18) are provided on the side wall of the air box (15). A one-way valve is provided on the air blowing hole (18). An annular tube (28) is provided on the side wall of the air box (15). The annular tube (28) is located below the air blowing hole (18). A disinfection tube (2) is provided on the top plate (804). 1) The disinfection tube (21) is provided with a piston plate (22), and a second return spring (23) is connected between the piston plate (22) and the inner top wall of the disinfection tube (21). A pressure box (24) is provided on the top wall of the first piston tube (9). The first piston tube (9) and the pressure box (24) are connected and a one-way valve is provided at the connection. A connecting pipe (25) is connected between the pressure box (24) and the disinfection tube (21), and a solenoid valve is provided on the connecting pipe (25). A first liquid outlet pipe (27) is connected between the disinfection tube (21) and the annular tube (28). A liquid storage tank (43) is provided on the material picker (6), and disinfectant alcohol is provided in the liquid storage tank (43). A first liquid inlet pipe (26) is connected between the disinfection tube (21) and the liquid storage tank (43), and a one-way valve is provided on both the first liquid outlet pipe (27) and the first liquid inlet pipe (26). An adjustment component is provided on one side of the first piston tube (9).

3. The sampling device according to claim 2, characterized in that, The tool holder (10) has a first connecting plate (11) on one side, and the material picker (6) has a second electric push rod (12) fixedly installed on one side for driving the first connecting plate (11) to move.

4. A sampling device according to claim 2, characterized in that, The disinfection assembly also includes a disinfection rack (39) fixedly installed on the inner wall of the material picker (6). The disinfection rack (39) has multiple nozzles on both the upper and lower sides, and the thickness of the disinfection rack (39) is slightly less than the thickness of the first material distribution ring (801). A third piston tube (36) is provided on one side of the material picker (6), and a second connecting plate (38) is installed on one side of the knife holder (10). A third piston rod (37) is movably inserted on the third piston tube (36), and the end of the third piston rod (37) away from the third piston tube (36) is installed on the second connecting plate (38). A second liquid outlet pipe (40) is connected between the third piston tube (36) and the disinfection rack (39), and a second liquid inlet pipe (41) is connected between the third piston tube (36) and the liquid storage tank (43).

5. A sampling device according to claim 2, characterized in that, The bottom wall of the air box (15) is provided with multiple suction nozzles (16), and the suction nozzles (16) are provided with one-way valves. The side wall of the top plate (804) is provided with a discharge hole (29), and the top wall of the material picker (6) is provided with a right-angle plate (44) that matches the discharge hole (29).

6. A sampling device according to claim 2, characterized in that, The adjustment assembly includes a second piston tube (30) disposed on the side of the first piston tube (9) near the knife holder (10). A second piston rod (31) is movably inserted at the top of the second piston tube (30). The second piston tube (30) and the first piston tube (9) are connected. When the first piston rod (13) moves upward, the second piston rod (31) moves upward. A pressure plate (32) is rotatably mounted at the top of the second piston rod (31), and a torsion spring is provided at the rotatable mounting point. A fixing frame (33) is provided on the first electric push rod (7). A sliding plate (34) is slidably mounted on the fixing frame (33). A first pressure switch (35) for controlling the solenoid valve is provided above the first piston tube (9). When the second piston rod (31) moves upward, it pushes the sliding plate (34) to slide upward. When the second piston rod (31) moves horizontally toward the sliding plate (34), the pressure plate (32) turns toward the first pressure switch (35).

7. A sampling device according to claim 6, characterized in that, The first piston tube (9) has a first electromagnet (19) on its inner top wall and a metal plate (20) on its top wall. When the first electromagnet (19) is energized, it attracts the metal plate (20). The first electromagnet (19) is controlled by the first pressure switch (35).

8. A sampling device according to claim 1, characterized in that, The tool holder (10) is provided with a second pressure switch (42) on the side away from the first material distribution ring (801). The inner wall of the material picker (6) is provided with a second electromagnet. The second material distribution ring (802) and the third material distribution ring (803) are provided with permanent magnets. When the second electromagnet is energized, it repels the permanent magnets.

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