Rapid detection device for pesticide residues in food
By introducing an airbag to maintain a constant temperature in the vegetable pesticide detection device, combined with a stirring assembly and a guide plate filter, the problems of insufficient mixing of vegetables and liquid and unstable temperature are solved, thus achieving accuracy and precision in pesticide residue detection.
Patent Information
- Application Number
- CN202511718085.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-21
- Publication Date
- 2026-01-16
AI Technical Summary
Existing pesticide detection devices for vegetables cannot effectively determine whether crushed vegetables are fully mixed with the liquid, and cannot maintain a stable temperature in a sealed environment, resulting in inaccurate test results.
A rapid testing device was designed, comprising a test chamber, a stirring assembly, an air bladder, and a fan. The air bladder maintains a constant temperature inside the chamber to avoid temperature fluctuations, the stirring assembly ensures uniform mixing, and the guide plate and filter screen filter solids to prevent solid clumps from affecting the test results.
This method ensures thorough mixing of vegetables and the liquid, reduces temperature fluctuations, guarantees the accuracy and precision of test results, and avoids detection errors caused by temperature changes and photolysis.
Smart Images
Figure CN121347754A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of food testing technology, specifically to a rapid detection device for pesticide residues in food. Background Technology
[0002] Pesticide residue testing is a crucial step in ensuring food safety. Its main purpose is to ensure that pesticide content in food is within safe limits, thereby protecting consumers' health. Pesticides are used to control pests, diseases, and weeds, but improper or excessive use can have negative health effects. Detecting pesticide residues is an essential component of food safety management.
[0003] Existing pesticide detection devices for vegetables cannot determine whether the crushed vegetables are fully integrated with the mixture before extracting the supernatant for testing. People can often only observe whether the solids in the test bottle are sticky or settled. The automatic stirring component may generate some heat during stirring. In a relatively sealed environment, it is impossible to ensure that the temperature inside the test chamber is kept relatively stable. Therefore, we propose a rapid detection device for pesticide residues in food. Summary of the Invention
[0004] The present invention provides the following technical solution: a rapid detection device for pesticide residues in food, comprising a test chamber and a test platform. The bottom of the inner wall of the test chamber is provided with a sliding groove, and four partitions slide in the sliding groove. The four partitions are symmetrically arranged around the inner wall of the test chamber. The side walls of the four partitions are provided with air bladders. The bottom of the side wall of the air bladder is fixed with an air outlet pipe. One end of the ventilation pipe is fixed to the side wall of the air bladder, and the other end of the ventilation pipe passes through the partition and is connected to a fan. The bottom of the fan is equipped with a rotating disc, the top of the fan is equipped with a stirring assembly, a one-way valve at the top of the fan extends through the stirring assembly into the interior of the stirring assembly, and a movable assembly is fitted on the top of the stirring assembly. The moving component includes a connecting platform disposed at the top of the stirring component. Four long rods are provided through the side wall of the connecting platform. A spring is fitted on the side wall of each of the four long rods at the end near the connecting platform. A rotating component extends from the bottom end of the spring. The top of the connecting platform is fixedly provided with a crushing component, which includes a guide plate set on the top of the connecting platform. A filter screen is rotatably provided on the side wall of the guide plate. The crushing component also includes a crushing box fixedly connected to the top of the connecting platform. An electromagnetic switch is provided at the bottom of the inner wall of the crushing box. A rotating plate is rotatably provided at the bottom of the inner wall of the crushing box on the side near the electromagnetic switch.
[0005] Preferably, the side wall of the airbag is provided with a limiting plate that is adapted to its size, and the limiting plate extends away from the partition to connect with the inner wall of the test chamber. The air outlet pipe passes through the partition and connects with the side wall of the airbag, and the air outlet end of the air outlet pipe is set towards the side closer to the fan.
[0006] Preferably, the bottom of the rotating disk is provided with a connecting plate, and the bottom of the test box is engaged with the connecting plate.
[0007] Preferably, the rotating assembly includes a fixed rod disposed at the bottom end of the spring, one end of an L-shaped connecting rod is rotatably provided on the side wall of the connecting platform, the other end of the L-shaped connecting rod is rotatably connected to the connecting plate, and a rotating block is rotatably provided on the side wall of the connecting plate.
[0008] Preferably, the stirring assembly includes a stirring box disposed on the top of the blower, two stirring blades are rotatably disposed inside the stirring box, and a vent is provided at the top of the blower. The size of the vent is adapted to the size of the one-way valve, and the position of the vent corresponds to the position of the one-way valve.
[0009] Preferably, the connecting platform is T-shaped, and two first rotating shafts are fixed on the side wall of the connecting platform. The two first rotating shafts are symmetrically arranged on both sides of the outer wall of the connecting platform. Two second rotating shafts are fixed on both sides of the outer wall of the connecting plate. The two second rotating shafts and the two first rotating shafts are located on the same horizontal line. The side wall of the rotating block is provided with a gear, and the central shaft of the gear passes through the rotating block and connects to the connecting plate. The bottom end of the fixed rod is provided with a rack that meshes with the gear.
[0010] Preferably, the spring has limiting discs at both ends of its sidewall, and the first limiting disc of the spring near the connecting platform is fixed to the sidewall of the connecting platform, while the second limiting disc of the spring away from the connecting platform is fixed to the long rod.
[0011] Preferably, the spring has limiting discs at both ends of its sidewall, and the first limiting disc of the spring near the connecting platform is fixed to the sidewall of the connecting platform, while the second limiting disc of the spring away from the connecting platform is fixed to the long rod.
[0012] Preferably, a pressure plate is fixedly provided at the top of the crushing box, and the position of the pressure plate corresponds to the position of the guide plate, and the guide plate is provided as a sloping panel.
[0013] Preferably, the inner wall of the crushing box has a discharge port at the bottom, the electromagnetic switch has an extension plate that slides inside, and the position of the extension plate corresponds to the position of the discharge port. The side wall of the electromagnetic switch has a first electromagnetic block on the side near the rotating plate.
[0014] Preferably, a second electromagnetic block is fixed on the top of the rotating plate on the side near the electromagnetic switch, and the position of the first electromagnetic block corresponds to the position of the second electromagnetic block.
[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This rapid pesticide residue detection device for food effectively filters the solid parts of vegetables through a filter screen set at the front end of the guide plate. The vegetable juice squeezed by the pressure plate flows directly into the mixing tank through the feed port to mix with the liquid. This avoids the vegetable juice from quickly blending with the liquid and forming a low-viscosity, high-concentration liquid zone. As the filter screen rotates, some solids fall into the mixing tank through the gap between the feed port and the extension plate for mixing. When a small amount of solids and a large amount of liquid are mixed evenly, the air blown into the mixing tank by the blower forms a series of uniform bubbles. When the bubbles reach the top of the liquid surface, they will generate a small impact force on the rotating plate, opening the feed port. The accumulated solids fall into the mixing tank in small amounts multiple times for mixing. This effectively prevents vegetable solids with more juice from easily agglomerating into clumps due to surface moisture and fiber adhesion. This makes it difficult for the extract to penetrate into the clumps, resulting in pesticides in the solids inside that cannot be extracted, creating blind spots of insufficient extraction.
[0016] 2. This rapid detection device for pesticide residues in food effectively reduces temperature fluctuations by incorporating a sandwich structure inside the test chamber. Increased temperature accelerates antibody inactivation, leading to lower test results, while excessively low temperature slows the reaction rate and reduces testing efficiency. Large temperature fluctuations can interfere with the accuracy of the final test results. The airbag design maintains a constant temperature within the chamber, reducing excessive temperature changes and ensuring light protection to prevent pesticide loss due to photolysis and isomerization. This ensures the test results accurately reflect the residue levels in the sample, reduces systematic errors, and avoids inaccurate results due to excessive external interference caused by direct sunlight, which can lead to temperature increases or the formation of new interfering substances.
[0017] 3. This rapid detection device for pesticide residues in food also prevents direct sunlight from shining on the connecting plate when the mixture is poured into the test tube on the rotating plate for centrifugation, by rotating the connecting plate while the air bladder expands. When the air outlet blows air, the connected plate, after its angle rotation, forms a physical barrier. At this time, the connecting plate, which has a guiding function, prevents the gas from diffusing upward too quickly and gathers the gas in the area near the mixing box and the rotating plate. This ensures that during the mixing process, the heat generated by the continuous operation of the components inside the detection box is avoided, which would cause the temperature inside the box to rise. Attached Figure Description
[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention; Figure 2 This is a second three-dimensional structural schematic diagram of the present invention; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is the third three-dimensional structural schematic diagram of the present invention; Figure 6 This is the fourth three-dimensional structural schematic diagram of the present invention; Figure 7 This is a schematic diagram of the mixing tank structure of the present invention; Figure 8 This is a schematic cross-sectional view of the mixing tank structure of the present invention; Figure 9 This is a schematic diagram of the mobile component structure of the present invention; Figure 10 This is a cross-sectional structural diagram of the moving component of the present invention. Figure 11 The fifth is a three-dimensional structural schematic diagram of the present invention.
[0019] In the diagram: 1. Test chamber; 2. Testing platform; 3. Airbag; 4. Partition; 5. Crushing box; 6. Guide plate; 7. Filter screen; 8. Electromagnetic switch; 9. Discharge port; 10. Rotating plate; 11. Connecting platform; 12. Long rod; 13. Spring; 14. Fixing rod; 15. Connecting plate; 16. Mixing box; 17. Fan; 18. Ventilation pipe; 19. Rotating disc; 20. Mixing blade; 21. One-way valve; 22. Rotating block; 23. L-shaped connecting rod; 24. Air outlet pipe. Detailed Implementation
[0020] 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.
[0021] Please see Figures 1 to 11 A rapid detection device for pesticide residues in food includes a test chamber 1 and a test platform 2. The bottom of the inner wall of the test chamber 1 is provided with a sliding groove, and four partitions 4 slide in the sliding groove. The four partitions 4 are symmetrically arranged around the inner wall of the test chamber 1. The side walls of the four partitions 4 are provided with airbags 3. The bottom of the side wall of the airbag 3 is fixed with an air outlet pipe 24. One end of the ventilation pipe 18 is fixed to the side wall of the airbag 3. The other end of the ventilation pipe 18 passes through the partition 4 and is connected to a fan 17. It should be noted that the gas blown out of the fan 17 is blown into the airbag 3 through the ventilation pipe 18. After the airbag 3 begins to expand, it pushes the partition 4 to move inside the test chamber 1. The sandwich structure set inside the test chamber 1 effectively reduces temperature fluctuations. The temperature rise will accelerate antibody inactivation, resulting in lower test results. The temperature is too low, which will slow down the reaction speed and reduce the test efficiency. Excessive temperature fluctuations can easily interfere with the accuracy of the final test results. The airbag 3 is set to maintain a constant temperature inside the chamber, reduce the occurrence of excessive temperature changes, and at the same time ensure the light protection of the test, avoid the loss of pesticides due to photolysis and isomerization, ensure that the test results can truly reflect the residual amount in the sample, reduce systematic errors, and avoid the situation where the test results are inaccurate due to excessive external interference caused by the temperature rise or the generation of new interfering substances caused by direct sunlight.
[0022] The bottom of the blower 17 is provided with a rotating disk 19, the top of the blower 17 is provided with a stirring assembly, the top of the blower 17 is provided with a one-way valve 21 extending through the stirring assembly into the interior of the stirring assembly, and the top of the stirring assembly is provided with a moving assembly. The moving component includes a connecting platform 11 located at the top of the stirring component. Four long rods 12 are provided through the side wall of the connecting platform 11. Springs 13 are fitted on the side wall of the four long rods 12 at the end near the connecting platform 11. A rotating component extends from the bottom end of the springs 13. It should be noted that when the long rod 12 is pushed, the rack at the bottom of the fixed rod 14 drives the gear meshing with it on the side wall of the rotating block 22 to rotate. Since the shaft of the gear is connected to the connecting plate 15, when the fixed rod 14 moves forward, the gear rotates clockwise. At this time, the second rotating shaft follows the rotation, which effectively ensures the stability of the connecting plate 15 when it rotates.
[0023] A crushing assembly is fixedly provided at the top of the connecting platform 11. The crushing assembly includes a guide plate 6 set at the top of the connecting platform 11. A filter screen 7 is rotatably provided on the side wall of the guide plate 6. The crushing assembly also includes a crushing box 5 fixedly connected to the top of the connecting platform 11. An electromagnetic switch 8 is provided at the bottom of the inner wall of the crushing box 5. A rotating plate 10 is rotatably provided at the bottom of the inner wall of the crushing box 5 on the side near the electromagnetic switch 8.
[0024] It should be noted that the filter 7 is designed to prevent vegetables with high juice content from mixing with the mixture at the same time. The presence of solid clumps will hinder the convection and diffusion of the liquid, and the vegetable juice will quickly blend with the mixture, which will affect the test results and lead to false negatives, interfering with the accuracy of the final result. At this time, it works in conjunction with the airbag 3. While mixing in the mixing chamber 16, the airbag 3 expands to prevent excessive temperature fluctuations from interfering with the accuracy of the final test results. As the airbag 3 expands, it drives the connecting plate 15 to rotate, preventing direct sunlight from hitting the test tubes on the rotating disk 19 during centrifugation. When the air outlet 24 blows air, the rotating connecting plate 15 forms a physical barrier. At this time, the connecting plate 15, which has a guiding function, prevents the gas from diffusing upward too quickly and gathers the gas in the area near the mixing box 16 and the rotating disk 19. This ensures that during the mixing process, the heat generated by the continuous operation of the components inside the testing box is avoided, which could lead to an increase in the temperature inside the box.
[0025] In an optional embodiment: the side wall of the airbag 3 is provided with a limiting plate adapted to its size, and the limiting plate extends away from the partition 4 to connect with the inner wall of the test chamber 1. The air outlet pipe 24 passes through the partition 4 and connects with the side wall of the airbag 3, and the air outlet end of the air outlet pipe 24 is set towards the side close to the fan 17.
[0026] It should be noted that the setting of the limiting plate effectively ensures that when the airbag 3 inflates, it avoids the shapeless expansion of the airbag 3, which would prevent it from pushing the front partition 4 to move.
[0027] In an optional embodiment: the bottom end of the rotating disk 19 is provided with a connecting disk, and the bottom end of the test box 1 is engaged with the connecting disk.
[0028] In an optional embodiment: the rotating assembly includes a fixed rod 14 disposed at the bottom end of the spring 13, one end of an L-shaped connecting rod 23 is rotatably disposed on the side wall of the connecting platform 11, the other end of the L-shaped connecting rod 23 is rotatably connected to the connecting plate 15, and a rotating block 22 is rotatably disposed on the side wall of the connecting plate 15.
[0029] It should be noted that when the airbag 3 inflates to the point where it can no longer push the long rod 12 forward, the pressure valve on the side wall of the airbag 3 exhausts the air through the air outlet pipe 24, which effectively prevents the airbag 3 from being unable to deflate when the inflation volume reaches its maximum value. The gas blown out by the air outlet pipe 24 avoids the situation where the heat generated by the continuous operation of the components inside the detection box causes the temperature inside the box to rise.
[0030] In an optional embodiment: the mixing assembly includes a mixing box 16 disposed on the top of the blower 17, two mixing blades 20 are rotatably disposed inside the mixing box 16, and a vent is provided at the top of the blower 17. The size of the vent is adapted to the size of the one-way valve 21, and the position of the vent corresponds to the position of the one-way valve 21.
[0031] It should be noted that the one-way valve 21 is designed to prevent the mixture from flowing into the bottom blower 17 due to gravity. The vent and the one-way valve 21 are positioned to ensure that the gas blown out of the blower 17 can be blown into the mixing tank 16 through the one-way valve 21, thus avoiding the weakening of airflow caused by pipe bends.
[0032] In an optional embodiment: the mixing assembly includes a mixing box 16 disposed on the top of the blower 17, two mixing blades 20 are rotatably disposed inside the mixing box 16, and a vent is provided at the top of the blower 17. The size of the vent is adapted to the size of the one-way valve 21, and the position of the vent corresponds to the position of the one-way valve 21.
[0033] It should be noted that the two stirring blades 20 will evenly stir the vegetables and the mixture entering the mixing box 16.
[0034] In an optional embodiment: the connecting platform 11 is T-shaped, and two first rotating shafts are fixed on the side wall of the connecting platform 11. The two first rotating shafts are symmetrically arranged on both sides of the outer wall of the connecting platform 11. Two second rotating shafts are fixed on both sides of the outer wall of the connecting plate 15. The two second rotating shafts and the two first rotating shafts are located on the same horizontal line. The side wall of the rotating block 22 is provided with a gear, and the central shaft of the gear passes through the rotating block 22 and is connected to the connecting plate 15. The bottom end of the fixing rod 14 is provided with a rack that meshes with the gear.
[0035] It should be noted that when the long rod 12 moves, it compresses the spring 13. At this time, the second limiting plate and the fixed rod 14 connected to the bottom end move together with the long rod 12. Since the rack at the bottom end of the fixed rod 14 meshes with the gear on the side wall of the rotating block 22, the gear at the bottom of the fixed rod 14 drives the gear to rotate when it moves, which rotates the connecting plate 15, which was originally perpendicular to the ground, upward and forms a certain angle with the mixing box 16. The change of angle, in conjunction with the gas blown out by the air outlet 24, forms a physical barrier to prevent the gas from diffusing upward too quickly and to concentrate the gas in the area close to the mixing box 16 and the rotating plate 19. This avoids the situation where the temperature inside the box rises due to the heat generated by the continuous operation of the components inside the detection box.
[0036] In an optional embodiment: both ends of the sidewall of the spring 13 are provided with limiting discs, and the first limiting disc of the spring 13 near the connecting platform 11 is fixed to the sidewall of the connecting platform 11, and the second limiting disc of the spring 13 away from the connecting platform 11 is fixed to the long rod 12.
[0037] It should be noted that when the long rod 12 is pushed, since the first limiting disc is fixed to the side wall of the connecting platform 11, the first limiting disc will not move with the long rod 12 and effectively limit the spring 13, preventing the spring 13 from moving into the connecting platform 11. Since the second limiting disc is fixed to the long rod 12, when the long rod 12 moves, the second limiting disc drives the rack at the bottom of the fixed rod 14 to move, and the gear meshing with it rotates. The connecting plate 15, which was originally perpendicular to the ground, rotates, and the side of the connecting plate 15 away from the mixing tank 16 is lifted upward. The setting of the spring 13 can make the long rod 12 return to the initial position after the thrust on the long rod 12 disappears, which is convenient for the next use.
[0038] In an optional embodiment: a pressure plate is fixedly provided at the top of the crushing box 5, and the position of the pressure plate corresponds to the position of the guide plate 6, which is a sloping panel.
[0039] It should be noted that, since the guide plate 6 is designed as a sloping plate, when vegetables with a lot of juice are squeezed by the pressure plate, the juice will flow into the mixing tank 16 through the sloping plate and mix with the liquid first. For some vegetables with a lot of juice, the vegetable juice will quickly blend with the liquid to form a low-viscosity, high-concentration liquid zone, while solids are prone to agglomerate. The presence of solid clumps will hinder the convection and diffusion of the liquid. The mixing of solids and liquid will affect the test results, leading to false negatives and interfering with the accuracy of the final results.
[0040] In an optional embodiment: a discharge port 9 is provided at the bottom of the inner wall of the crushing box 5, an extension plate slides inside the electromagnetic switch 8, and the position of the extension plate corresponds to the position of the discharge port 9. A first electromagnetic block is fixed on the side wall of the electromagnetic switch 8 near the rotating plate 10.
[0041] It should be noted that, since the extension plate in the initial state does not cover the entire feed port 9, some solids will fall into the mixing tank 16 through the gaps remaining between the feed port 9 and the extension plate for mixing. Mixing vegetables and liquid in batches effectively avoids the situation that the mixing efficiency will decrease and the mixing will be insufficient if the solids and extract are mixed at once. Vegetable solids with more juice are also prone to agglomerate into clumps due to surface moisture and fiber adhesion. The extract is difficult to penetrate into the clumps, resulting in the inability to extract pesticides in the solids and creating blind spots of insufficient extraction.
[0042] In an optional embodiment: a second electromagnetic block is fixed to the top of the rotating plate 10 on the side near the electromagnetic switch 8, and the position of the first electromagnetic block corresponds to the position of the second electromagnetic block.
[0043] It should be noted that when the bubbles reach the top of the liquid surface, they will exert a small impact force on the side of the rotating plate 10 facing the mixing tank 16. At this time, the rotating plate 10 rotates on the side wall of the crushing box 5 due to the impact. The first electromagnetic block at the top of the rotating plate 10 is in contact with the second electromagnetic block on the side wall of the electromagnetic switch 8. After the electromagnetic blocks are in contact and energized, the electromagnetic switch 8 is turned on. The electromagnetic switch 8 drives the extension plate to move away from the discharge port 9. The gap between the discharge port 9 and the extension plate is increased, so that the solids accumulated on the crushing box 5 leak out from the discharge port 9. The solids are mixed with the liquid in batches to avoid excessive adhesion and insufficient mixing, thereby improving the accuracy of detection.
[0044] Working principle: When the washed vegetables need to be tested, the fan 17 is started. The air blown out by the fan 17 is blown into the air bag 3 through the ventilation pipe 18. After the air bag 3 begins to expand, it pushes the partition 4 to move inside the test chamber 1. The interlayer inside the test chamber 1 effectively reduces temperature fluctuations. Open the top cover of the crushing chamber 5, place the washed vegetables on the guide plate 6, and manually press down the pressure plate at the top of the crushing chamber 5 to squeeze out the juice. The filter screen 7 at the front end of the guide plate 6 effectively filters out the solid parts of the vegetables. The vegetable juice squeezed by the pressure plate flows directly into the mixing chamber 16 through the feed port 9 to mix with the liquid. Because the filter screen 7 rotates with damping on the guide plate 6, the filter screen 7 is rotatably connected to the side wall of the guide plate 6. When the weight of the solid vegetables accumulated after being intercepted by the filter screen 7 reaches a certain weight, the gravity of the accumulated vegetables pushes the filter screen 7 to rotate on the guide plate 6. At this time, the solid vegetables intercepted on the filter screen 7 fall into the extension plate set on the side wall of the bottom electromagnetic switch 8. See Appendix Figure 5 Since the extension plate in the initial state fails to cover the entire discharge port 9, some solids will fall into the mixing tank 16 through the gap between the discharge port 9 and the extension plate for mixing. When the vegetables and the mixture are mixed in the mixing tank 16, since the amount of mixture stored in the mixing tank 16 is fixed, after the solids and juices leaking out from the gap of the feed port 9 are mixed with the mixture, the liquid level in the mixing tank 16 will gradually approach the bottom of the rotating plate 10. The air blown out by the blower 17 is blown into the mixing tank 16 through the one-way valve 21 set at the connection between the mixing tank 16 and the blower 17. The blower 17 blows air upwards, and the gas rises and generates bubbles in the mixing tank 16. When the mixture is not mixed evenly with the vegetables, the bubbles may be trapped in the gaps between the unblended vegetable solid particles. When rising, they may also change direction due to collisions with the vegetable solid particles. After the energy is consumed, it is difficult to continue rising to the top. As a result, the bubbles generated by the liquid in the mixing tank 16 after the blower 17 blows air are small and disappear before reaching the top of the liquid surface, thus failing to generate a large impact force on the rotating plate 10. If the mixture is uneven, the stirring blades 20 will continue to stir. When the blower 17 blows air and generates uniform bubbles, the liquid and vegetable solids in the mixing tank 16 are evenly mixed. When the bubbles reach the top of the liquid surface, they will exert a small impact force on the side of the rotating plate 10 facing the mixing tank 16. Please refer to [link / reference needed]. Figure 8 At this time, the rotating plate 10 is impacted and rotates on the side wall of the crushing box 5. The first electromagnetic block on the top of the rotating plate 10 is in contact with the second electromagnetic block on the side wall of the electromagnetic switch 8. After the electromagnetic blocks are in contact and energized, the electromagnetic switch 8 is turned on. The electromagnetic switch 8 drives the extension plate to move away from the end of the discharge port 9. The gap between the discharge port 9 and the extension plate is increased, so that the solids accumulated on the crushing box 5 leak out from the discharge port 9 and are mixed in small batches. To prevent the mixture inside the mixing tank 16 from evaporating too quickly due to direct sunlight, when the air bag 3 inflates, the partition 4 pushes the long rod 12 into the mixing tank 16. When the long rod 12 moves, it compresses the spring 13. At this time, the second limiting plate and the fixed rod 14 connected to the bottom end move together with the long rod 12. Since the rack at the bottom end of the fixed rod 14 meshes with the gear on the side wall of the rotating block 22, the gear at the bottom of the fixed rod 14 drives the gear to rotate when it moves. The connecting plate 15, which was originally perpendicular to the ground, rotates, and the side of the connecting plate 15 away from the mixing tank 16 is lifted upward. When the airbag 3 inflates to the point where it can no longer push the long rod 12 forward, the pressure valve on the side wall of the airbag 3 exhausts gas through the air outlet pipe 24. The physical barrier connecting plate 15 prevents the gas from diffusing upward too quickly, and the gas gathers in the area near the mixing tank 16 and the rotating plate 19 to avoid the temperature inside the tank rising. After mixing is complete, the opening at the bottom of the mixing tank 16 is manually opened so that the mixture flows into the corresponding test tube for centrifugation. The supernatant is then taken and tested on the testing platform.
[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A rapid detection device for pesticide residues in food, comprising a test box (1) and a detection platform (2), characterized in that: The test chamber (1) has a sliding groove at the bottom of its inner wall. Four partitions (4) slide in the sliding groove and are symmetrically arranged around the inner wall of the test chamber (1). The side walls of the four partitions (4) are provided with airbags (3). An air outlet pipe (24) is fixed at the bottom of the side wall of the airbag (3). One end of a ventilation pipe (18) is fixed on the side wall of the airbag (3). The other end of the ventilation pipe (18) passes through the partition (4) and is connected to the fan (17). The bottom of the blower (17) is provided with a rotating disk (19), the top of the blower (17) is provided with a stirring assembly, the top of the blower (17) is provided with a one-way valve (21) extending through the stirring assembly into the interior of the stirring assembly, and the top of the stirring assembly is provided with a moving assembly. The moving component includes a connecting platform (11) disposed at the top of the stirring component. Four long rods (12) are provided through the side wall of the connecting platform (11). A spring (13) is sleeved on the side wall of each of the four long rods (12) at the end near the connecting platform (11). A rotating component extends from the bottom end of the spring (13). The top of the connecting platform (11) is fixedly provided with a crushing component, wherein the crushing component includes a guide plate (6) provided on the top of the connecting platform (11), and a filter screen (7) is rotatably provided on the side wall of the guide plate (6). The crushing component also includes a crushing box (5) fixedly connected to the top of the connecting platform (11). An electromagnetic switch (8) is provided at the bottom of the inner wall of the crushing box (5), and a rotating plate (10) is rotatably provided at the bottom of the inner wall of the crushing box (5) on the side near the electromagnetic switch (8).
2. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The side wall of the airbag (3) is provided with a limiting plate that is adapted to its size, and the limiting plate extends to the side away from the partition (4) to connect with the inner wall of the test box (1). The air outlet pipe (24) passes through the partition (4) and connects with the side wall of the airbag (3), and the air outlet end of the air outlet pipe (24) is set towards the side close to the fan (17).
3. The device for rapid detection of pesticide residues in food according to claim 1, characterized in that: The bottom of the rotating disk (19) is provided with a connecting disk, and the bottom of the test box (1) is engaged with the connecting disk.
4. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The rotating assembly includes a fixed rod (14) disposed at the bottom end of the spring (13), one end of an L-shaped connecting rod (23) is rotatably provided on the side wall of the connecting platform (11), the other end of the L-shaped connecting rod (23) is rotatably connected to the connecting plate (15), and a rotating block (22) is rotatably provided on the side wall of the connecting plate (15).
5. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The stirring assembly includes a stirring box (16) set on top of the blower (17). The stirring box (16) has two stirring blades (20) rotating inside. The blower (17) has an air vent at the top. The size of the air vent is adapted to the size of the one-way valve (21), and the position of the air vent corresponds to the position of the one-way valve (21).
6. The rapid detection device for pesticide residues in food according to claim 4, characterized in that: The connecting platform (11) is T-shaped, and two first rotating shafts are fixed on the side wall of the connecting platform (11). The two first rotating shafts are symmetrically arranged on both sides of the outer wall of the connecting platform (11). Two second rotating shafts are fixed on both sides of the outer wall of the connecting plate (15). The two second rotating shafts and the two first rotating shafts are located on the same horizontal line. The side wall of the rotating block (22) is provided with a gear, and the central axis of the gear passes through the rotating block (22) and connects to the connecting plate (15). The bottom end of the fixed rod (14) is provided with a rack that meshes with the gear.
7. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The spring (13) has a limiting disc at both ends of its sidewall. The first limiting disc of the spring (13) near the connecting platform (11) is fixed to the sidewall of the connecting platform (11), and the second limiting disc of the spring (13) away from the connecting platform (11) is fixed to the long rod (12).
8. The device for rapid detection of pesticide residues in food according to claim 1, characterized in that: The top of the crushing box (5) is fixedly provided with a pressure plate, and the position of the pressure plate corresponds to the position of the guide plate (6). The guide plate (6) is a sloping plate with a slope.
9. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The inner wall of the crushing box (5) has a discharge port (9) at the bottom. The electromagnetic switch (8) has an extension plate that slides inside, and the position of the extension plate corresponds to the position of the discharge port (9). The side wall of the electromagnetic switch (8) has a first electromagnetic block on the side near the rotating plate (10).
10. A rapid detection device for pesticide residues in food according to claim 9, characterized in that: The top of the rotating plate (10) is provided with a second electromagnetic block on the side near the electromagnetic switch (8), and the position of the first electromagnetic block corresponds to the position of the second electromagnetic block.