Rapid detection device for pesticide residues in food and use method of rapid detection device

Abstract

The invention discloses a rapid detection device for pesticide residues in food and a use method of the rapid detection device, and relates to the technical field of food detection.The rapid detection device comprises a detector body and a box, a containing groove is formed in the inner side of the detector body, and one end of the detector body is fixedly connected with the box; one end of the detector main body is fixedly connected with a feeding mechanism, a cuvette is placed on the inner side of the feeding mechanism, and a pressing mechanism is arranged above a placing groove, so that the integrated design realizes full-process automation from sample pretreatment to detection, and effectively solves the problems of tedious operation and low efficiency of a traditional method; the overall detection efficiency is improved, and the method is particularly suitable for rapid screening of batch samples.

Description

Technical Field

[0001] The present invention relates to the technical field of food detection, and particularly relates to a rapid detection device for pesticide residues in food and a method for using the same. Background Art

[0002] The pesticide residue detector measures the amount of pesticide residues (i.e., inhibition rate) in a measured sample based on the inhibitory effect of pesticides in the sample on the activity of cholinesterase, which affects the speed of the color reaction. The amount of pesticide residues - inhibition rate in the measured sample can be directly displayed on the liquid crystal screen, and the detection result can be directly printed. Before detecting pesticides in food, the food needs to be processed first, mainly including the following steps: 1) cutting; 2) weighing; 3) transferring to a test tube; 4) adding a quantitative buffer solution to the test tube containing the sample with a pipette and shaking for extraction for one minute, then standing for at least 10 minutes; 5) taking the buffer solution with a pipette and adding it to the control tube; 6) adding the test solution in the test tube to the sample tube with a pipette; 7) adding cholinesterase to the control tube and the sample tube with a pipette; 8) then adding a color developing agent to the control tube and the sample tube, shaking well and standing for 10 minutes; 9) adding a substrate reagent to the control tube and the sample tube; 10) then pouring the reagents in the control tube and the sample tube into a cuvette and performing on-machine detection.

[0003] Currently, mainstream pesticide residue detectors generally lack the function of automatic sample processing. Staff need to manually complete multiple operations such as sampling, pretreatment, and sample addition throughout the process. This process is not only cumbersome (involving multiple steps of manual intervention such as reagent preparation, oscillating extraction, and centrifugal separation), but also easily affects the accuracy of the detection result due to human operation errors, and at the same time prolongs the single detection cycle. Therefore, in view of the above problems, a rapid detection device for pesticide residues in food and a method for using the same are proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a rapid detection device for pesticide residues in food and a method for using the same to solve the problems in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A rapid detection device for pesticide residues in food and its usage method, including a detector main body and a box body. A placement groove is formed inside the detector main body. One end of the detector main body is fixedly connected to the box body. One end of the detector main body is fixedly connected to a feeding mechanism. A colorimetric dish is placed inside the feeding mechanism. A pressing mechanism is arranged above the placement groove. A first support plate and a second support plate are fixedly connected inside the box body. A weighing sensor is fixedly connected inside the second support plate. Baffles fixedly connected to the second support plate are arranged around the weighing sensor. An extraction tube is placed on the weighing sensor. A sample tube and a reference tube are respectively screwed inside the first support plate. Sealing and stirring mechanisms are fixedly connected to the tops of the extraction tube, the sample tube, and the reference tube. A feeding mechanism is screwed inside the top inner side of the box body. One end of the sealing and stirring mechanism fixedly connected to the sample tube and the reference tube is fixedly connected to a power mechanism. Negative pressure pumps are communicated with one ends of the extraction tube, the sample tube, and the reference tube.

[0006] Preferably, a first storage cylinder, a second storage cylinder, a third storage cylinder, and a fourth storage cylinder are placed inside the box body. Water pumps are communicated with one ends of the extraction tube, the first storage cylinder, the second storage cylinder, the third storage cylinder, and the fourth storage cylinder. The outlet end of the water pump is communicated with a first liquid outlet pipe. One end of the first liquid outlet pipe on the side of the first storage cylinder, the second storage cylinder, the third storage cylinder, and the fourth storage cylinder is communicated with a second liquid outlet pipe. One end of the first liquid outlet pipe on the side of the fourth storage cylinder is also communicated with a third liquid outlet pipe. Flow meters and solenoid valves are communicated with the outsides of the first liquid outlet pipe, the second liquid outlet pipe, and the third liquid outlet pipe. Check valves are communicated with the top inner sides of the first storage cylinder, the second storage cylinder, the third storage cylinder, and the fourth storage cylinder.

[0007] Preferably, the feeding mechanism includes a cutting cylinder screwed to the box body. A cutting knife is arranged inside the cutting cylinder. A transfer box is communicated with the outside of the bottom end of the cutting cylinder. A feeding port is formed inside the bottom end of the transfer box. A slide rail is slidably connected to the inside of the bottom end of the transfer box. A plug plate is fixedly connected to the bottom end of the slide rail. A first rack is fixedly connected to the bottom end of the plug plate. A first motor is fixedly connected to one end of the transfer box. The end of the main shaft of the first motor is fixedly connected to an extrusion shell rotatably connected to the transfer box.

[0008] Preferably, a first electric telescopic rod is rotatably connected to one end of the transfer box. The other end of the first electric telescopic rod is rotatably connected to a connecting rod rotatably connected to the transfer box. The other end of the connecting rod is rotatably connected to a second motor. The end of the main shaft of the second motor is fixedly connected to a first gear.

[0009] Preferably, the sealing and stirring mechanism includes a sealing frame fixedly connected to the tops of the extraction tube, the sample tube, and the control tube. A sealing ring is fixedly connected to the inner wall of the sealing frame. A sealing shell is slidably connected to the inner side of one end of the sealing frame and the sealing ring. A second rack is fixedly connected to the inner top of the sealing shell. A roller is rotatably connected to the inner side of the sealing shell and is in contact with the sealing ring. A stirring rod is fixedly connected to the end of the rotating shaft of the roller.

[0010] Preferably, the feeding mechanism includes a support frame fixedly connected to the main body of the detector. A placement rack is fixedly connected to the top of the support frame. A third motor is fixedly connected to the inner side of the support frame. A first screw rod is fixedly connected to the end of the main shaft of the third motor. A push block is helically connected to the outer side of the first screw rod. The push block penetrates the bottom end surface of the placement rack and is slidably connected to the placement rack. Moving rods are slidably connected to both ends of the placement rack. A connecting rod is fixedly connected between the moving rods. A spring is fixedly connected to the inner side of the moving rod. The other end of the spring is fixedly connected to a limiting plate slidably connected to the moving rod. The other end of the limiting plate is fixedly connected to a guiding column slidably connected to the moving rod. The other end of the guiding column is fixedly connected to a clamping block.

[0011] Preferably, a fourth motor is fixedly connected to one end of the placement rack. A second screw rod is fixedly connected to the end of the main shaft of the fourth motor and is helically connected to one of the moving rods. A guiding shaft fixedly connected to the placement rack is slidably connected to the inner side of the other moving rod.

[0012] Preferably, the power mechanism includes a fifth motor fixedly connected to the sealing frame disposed on one side of the control tube and the sample tube. A second gear is fixedly connected to the end of the main shaft of the fifth motor.

[0013] Preferably, the pressing mechanism includes a second electric telescopic rod fixedly connected to the main body of the detector. A pressing plate is fixedly connected to the top of the second electric telescopic rod.

[0014] Preferably, S1: Place the sample inside the feeding mechanism to be chopped and transported to the inside of the extraction tube for weighing. At the same time, the colorimetric cuvette can also be placed inside the placement groove through the cooperation of the feeding mechanism and the pressing mechanism; S2: Add the buffer solution inside the fourth storage cylinder to the inside of the extraction tube, and then stir and mix. At the same time, the buffer solution inside the fourth storage cylinder can also be added to the control tube; S3: After mixing, use a negative pressure pump to make the inside of the extraction tube in a negative pressure state, so that the bubbles inside the extraction tube can quickly escape and reduce the standing time; S4: Add the test solution inside the extraction tube to the sample tube; S5: Add the cholinesterase in the third storage tube and the color developer in the second storage tube to the inner side of the control tube and the sample tube at the same time, and then stir. Then, the negative pressure pump makes the inner side of the control tube and the sample tube in a negative pressure state, so that the bubbles in the control tube and the sample tube escape quickly, and the static time is reduced; S6: adding the substrate reagent in the first storage cylinder to the control tube and the sample tube; S7: Then add the test solution in the control tube and the sample tube into the corresponding cuvette; S8: The colorimetric cell is sealed by a pressing mechanism, and then tested by the detector body.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. A rapid detection device for pesticide residues in food and a method for using the device. The built-in feeding mechanism of the device can automatically shred and quantitatively feed food samples. The shredded samples gradually fall into the extraction tube. By adjusting the number of openings of the feeding ports, precise control can be achieved when the sample is close to the specified weight; when the sample weight approaches the threshold, the system automatically switches to a single feeding port for micro-feeding, avoiding the overweight problem caused by multiple feeding ports working at the same time, significantly improving the feeding accuracy. This design does not require manual cutting, weighing and transferring of samples, simplifies the operation process, reduces human errors, and greatly improves the detection efficiency.

[0016] 2. A rapid detection device for pesticide residues in food and a method of using the same. A sealed stirring mechanism is provided to quickly stir the solutions inside an extraction tube, a sample tube and a control tube without manual shaking. After shaking, the openings of the extraction tube, the sample tube and the control tube are sealed by a sealing shell, and the gas inside the extraction tube, the sample tube and the control tube is extracted by a negative pressure pump, so that the inside of the extraction tube, the sample tube and the control tube is in a negative pressure state, so that the bubbles in the extraction tube, the sample tube and the control tube can be quickly removed, thereby reducing the standing time and speeding up the detection process. No manual shaking is required, thereby improving the overall work efficiency.

[0017] 3. A rapid detection device for pesticide residues in food and a method of using the same. The feeding mechanism and the pressing mechanism cooperate with each other to place the cuvettes one by one into the inner side of the placement slot. No manual placement is required, which is convenient for staff to use and improves the overall detection efficiency. During the detection, the pressing mechanism can also shield the cuvettes to ensure the normal operation of the monitoring instrument body.

[0018] In summary, a rapid detection device for pesticide residues in food and its usage method have the following innovative advantages: Firstly, the device is equipped with an intelligent feeding mechanism, which can automatically and precisely cut, quantitatively feed, and transfer samples. Through the coordinated control of multiple feeding ports, high-precision weighing is achieved, avoiding overweight problems and significantly reducing manual operation errors. Secondly, a sealed stirring mechanism is adopted to achieve automatic and uniform mixing of the solution, and the negative pressure defoaming technology is used to quickly remove bubbles, significantly shortening the standing time. Finally, through the coordinated action of the feeding mechanism and the pressing mechanism, the automatic picking, placing, and positioning of the colorimetric cuvette are realized, ensuring the normal operation of the detector and improving the operation convenience. This integrated design realizes the full-process automation from sample pretreatment to detection, effectively solving the problems of cumbersome operation and low efficiency of traditional methods, improving the overall detection efficiency, and being particularly suitable for the rapid screening of batch samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of a rapid detection device for pesticide residues in food and its usage method of the present invention.

[0021] Figure 2 It is a schematic diagram of the internal installation structure of the box body of a rapid detection device for pesticide residues in food and its usage method of the present invention.

[0022] Figure 3 It is a schematic diagram of the installation structure of the first motor of a rapid detection device for pesticide residues in food and its usage method of the present invention.

[0023] Figure 4 It is a schematic diagram of the installation structure of the feeding port of a rapid detection device for pesticide residues in food and its usage method of the present invention.

[0024] Figure 5 It is a schematic diagram of the installation structure of the slide rail of a rapid detection device for pesticide residues in food and its usage method of the present invention.

[0025] Figure 6 It is a schematic diagram of the installation structure of the first electric telescopic rod of a rapid detection device for pesticide residues in food and its usage method of the present invention.

[0026] Figure 7 It is a schematic diagram of the installation structure of the extraction tube of a rapid detection device for pesticide residues in food and its usage method of the present invention.

[0027] Figure 8 Schematic diagram of the internal installation structure of the sealing shell of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0028] Figure 9 Schematic diagram of the installation structure of the control tube of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0029] Figure 10 Schematic diagram of the structure of the power mechanism of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0030] Figure 11 Schematic diagram of the installation structure of the push block of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0031] Figure 12 Schematic diagram of the installation structure of the first screw of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0032] Figure 13 Schematic diagram of the installation structure of the second screw of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0033] Figure 14 Schematic diagram of the installation structure of the clamping block of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0034] Figure 15 Schematic diagram of the installation structure of the one - way valve of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0035] Figure 16 Schematic diagram of the structure of the pressing mechanism of a rapid detection device for pesticide residues in food and its usage method according to the present invention.

[0036] In the figure: 1. Feeding mechanism; 101. Cutting cylinder; 102. Cutting knife; 103. Transfer box; 104. First motor; 105. Extrusion shell; 106. Feeding port; 107. Plug plate; 108. Slide rail; 109. First rack; 110. First electric telescopic rod; 111. Connecting rod; 112. Second motor; 113. First gear; 2. Sealing and stirring mechanism; 201. Sealing frame; 202. Sealing ring; 203. Sealing shell; 204. Second rack; 205. Roller; 206. Stirring rod; 3. Loading mechanism; 301. Support frame; 302. Guide shaft; 303. Third motor; 304. First screw; 305. Push block; 306. Guide post; 307. Fourth motor; 308. Second screw; 309. Connecting rod; 310. Moving rod; 311. Spring; 312. Limit plate; 313. Clamping block; 314. Placing rack; 4. Power mechanism; 401. Fifth motor; 402. Second gear; 5. Pressing mechanism; 501. Pressing plate; 502. Second electric telescopic rod 6. Placing groove; 7. Box body; 8. First support plate; 9. Second support plate; 10. Extraction pipe; 11. Weighing sensor; 12. Baffle; 13. Negative pressure pump; 14. Sample tube; 15. Control tube; 16. Water pump; 17. First liquid outlet pipe; 18. Flowmeter; 19. Solenoid valve; 20. First storage cylinder; 21. Second storage cylinder; 22. Third storage cylinder; 23. Fourth storage cylinder; 24. Check valve; 25. Second liquid outlet pipe; 26. Third liquid outlet pipe; 27. Detector main body; 28. Colorimetric cuvette. Detailed implementation manners

[0037] The present invention will be further described below in conjunction with the specific implementation manners. Among them, the drawings are only for illustrative purposes, showing only schematic diagrams, rather than physical diagrams, and should not be construed as a limitation on the present invention. In order to better illustrate the specific implementation manners of the present invention, some components in the drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. Based on the specific implementation manners in the present invention, all other specific implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0038] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The present invention will be further elaborated below in conjunction with the specific implementation manners.

[0039] Embodiment

[0040] As Figures 1-16As shown in the figure, a rapid detection device for pesticide residues in food and its usage method include a detector main body 27 and a box body 7. A PLC control system is integrated inside the detector main body 27 to realize the automated and orderly operation of each electrical component of the device through a preset program. A placement groove 6 is provided inside the detector main body 27 for storing colorimetric cuvettes. One end of the detector main body 27 is fixedly connected to a box body 7, and one end of the detector main body 27 is fixedly connected to a feeding mechanism 3. Colorimetric cuvettes 28 are placed inside the feeding mechanism 3, and the colorimetric cuvettes 28 are used to store the mixed liquid to be detected and the comparison liquid. A pressing mechanism 5 is arranged above the placement groove 6. Inside the box body 7, a first support plate 8 and a second support plate 9 are fixedly connected. A weighing sensor 11 is fixedly connected inside the second support plate 9. The weighing sensor 11 can accurately measure the weight of the required sample. A baffle 12 fixedly connected to the second support plate 9 is arranged around the weighing sensor 11. The baffle 12 plays a role in limiting the extraction tube 10 to ensure the stability of the extraction tube 10 during operation. The extraction tube 10 is placed on the weighing sensor 11. Inside the first support plate 8, a sample tube 14 and a control tube 15 are respectively connected by screw threads. Sealing and stirring mechanisms 2 are fixedly connected to the tops of the extraction tube 10, the sample tube 14, and the control tube 15. A feeding mechanism 1 is screwed to the inner top of the box body 7. One end of the sealing and stirring mechanism 2 fixedly connected to the sample tube 14 and the control tube 15 is fixedly connected to a power mechanism 4. One end of each of the extraction tube 10, the sample tube 14, and the control tube 15 is communicated with a negative pressure pump 13. The negative pressure pump 13 is communicated with the extraction tube 10, the sample tube 14, and the control tube 15 through vacuum rubber tubes. The vacuum rubber tubes have good flexibility and are easy to bend, which will not affect the removal and cleaning of the extraction tube 10, the sample tube 14, and the control tube 15. At the same time, a pressure gauge can be installed outside the vacuum rubber tube to detect the pressure inside the extraction tube 10, the sample tube 14, and the control tube 15. The negative pressure pump 13 can make the inside of the extraction tube 10, the sample tube 14, and the control tube 15 in a negative pressure state, so as to quickly remove the bubbles in the extraction tube, the sample tube, and the control tube, thereby reducing the standing time and accelerating the detection process without manual shaking, thus improving the overall work efficiency.

[0041] As a further improvement of the present invention, as Figure 2 and Figure 15As shown, a first storage cylinder 20, a second storage cylinder 21, a third storage cylinder 22 and a fourth storage cylinder 23 are placed inside the box body 7. One ends of the extraction pipe 10, the first storage cylinder 20, the second storage cylinder 21, the third storage cylinder 22 and the fourth storage cylinder 23 are all connected to a water pump 16. The outlet end of the water pump 16 is connected to a first liquid outlet pipe 17. One end of the first liquid outlet pipe 17 on one side of the first storage cylinder 20, the second storage cylinder 21, the third storage cylinder 22 and the fourth storage cylinder 23 is connected to a second liquid outlet pipe 25. One end of the first liquid outlet pipe 17 on one side of the fourth storage cylinder 23 is also connected to a third liquid outlet pipe 26. Flow meters 18 and electromagnetic valves 19 are connected to the outsides of the first liquid outlet pipe 17, the second liquid outlet pipe 25 and the third liquid outlet pipe 26. Check valves 24 are connected to the inner sides of the tops of the first storage cylinder 20, the second storage cylinder 21, the third storage cylinder 22 and the fourth storage cylinder 23. The first storage cylinder 20, the second storage cylinder 21, the third storage cylinder 22 and the fourth storage cylinder 23 respectively store substrate reagents, chromogenic agents, cholinesterase and buffers. The flow meters 18 monitor the filling amounts of each reagent (substrate reagent, chromogenic agent, cholinesterase, buffer) in real time to ensure compliance with the detection standards, and the opening and closing of the first liquid outlet pipe 17, the second liquid outlet pipe 25 and the third liquid outlet pipe 26 can be controlled through the electromagnetic valves 19. At the same time, the shapes of the first liquid outlet pipe 17, the second liquid outlet pipe 25 and the third liquid outlet pipe 26 and the pipeline layout can be designed according to the actual installation and use conditions.

[0042] As a further improvement of the present invention, as Figure 2 , Figure 3 and Figure 4As shown in the figure, the blanking mechanism 1 includes a cutting cylinder 101 spirally connected to the box body 7. A cutting knife 102 is arranged inside the cutting cylinder 101. The outer bottom end of the cutting cylinder 101 is communicated with a transfer box 103. A blanking port 106 is opened inside the bottom end of the transfer box 103. A slide rail 108 is slidably connected to the inner bottom end of the transfer box 103. A blocking plate 107 is fixedly connected to the bottom end of the slide rail 108. A first rack 109 is fixedly connected to the bottom end of the blocking plate 107. One end of the transfer box 103 is fixedly connected to a first motor 104. The end of the main shaft of the first motor 104 is fixedly connected to an extrusion shell 105 rotatably connected to the transfer box 103; The cutting knife 102 consists of a power motor and a cutting knife. Through the cutting knife 102, the sample inside the cutting cylinder 101 can be chopped. The chopped sample will fall into the inside of the transfer box 103. When the sample inside the transfer box 103 needs to be added to the extraction tube 10, at the beginning of the addition, the blocking plate 107 is completely moved away from below the blanking port 106, so that multiple blanking ports 106 work simultaneously. At the same time, the first motor 104 drives the extrusion shell 105 to rotate into the transfer box 103 and extrude the sample, so that the sample falls out through the blanking port 106, and the falling sample falls into the extraction tube 10 through the lower sealing frame 201. At the same time, the weighing sensor 11 will monitor the weight of the sample inside the weighing sensor 11 in real time. When approaching the set weight threshold, the blocking plate 107 blocks other blanking ports 106 and only one blanking port 106 works, avoiding the overweight problem caused by multiple blanking ports 106 working simultaneously, significantly improving the blanking accuracy. This design does not require manual cutting, weighing and transferring of samples, simplifies the operation process, reduces human error, and at the same time greatly improves the detection efficiency; As a further improvement of the present invention, as Figure 4 and Figure 6 shown, one end of the transfer box 103 is rotatably connected to a first electric telescopic rod 110. The other end of the first electric telescopic rod 110 is rotatably connected to a connecting rod 111 rotatably connected to the transfer box 103. The other end of the connecting rod 111 is rotatably connected to a second motor 112. The end of the main shaft of the second motor 112 is fixedly connected to a first gear 113. When the blocking plate 107 needs to be moved, the first electric telescopic rod 110 adjusts the positions of the second motor 112 and the first gear 113 through the connecting rod 111, so that the first gear 113 meshes with the first rack 109. Then, the second motor 112 drives the first gear 113 to rotate forward or backward, so that the first gear 113 drives the blocking plate 107 to move at the bottom of the transfer box 103 through the first rack 109, and the blocking plate 107 adjusts the number of samples discharged from the blanking port 106.

[0043] As a further improvement of the present invention, as Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown in the figure, the sealing and stirring mechanism 2 includes a sealing frame 201 fixedly connected to the tops of the extraction tube 10, the sample tube 14, and the control tube 15. A sealing ring 202 is fixedly connected to the inner wall of the sealing frame 201. A sealing shell 203 is slidably connected to the inner side of one end of the sealing frame 201 and the sealing ring 202. A second rack 204 is fixedly connected to the inner top of the sealing shell 203. The power mechanism 4 includes a fifth motor 401 fixedly connected to the sealing frame 201 provided on one side of the control tube 15 and the sample tube 14. A second gear 402 is fixedly connected to the end of the main shaft of the fifth motor 401. When it is necessary to slide the sealing shell 203 on one side of the extraction tube 10 inside the sealing frame 201, the first electric telescopic rod 110 adjusts the positions of the second motor 112 and the first gear 113 through the connecting rod 111, so that the first gear 113 meshes with the second rack 204, and then the first gear 113 can drive the sealing shell 203 to move through the second rack 204; when it is necessary to slide the sealing shell 203 on one side of the sample tube 14 and the control tube 15 inside the sealing frame 201, the fifth motor 401 drives the corresponding sealing shell 203 to move through the second gear 402 and the second rack 204; When it is necessary to add the chopped sample into the extraction tube 10 or add a solution into the sample tube 14 and the control tube 15, the sealing shell 203 is moved out from the inside of the sealing frame 201, so that the sample can fall into the extraction tube 10 through the sealing frame 201. When standing still after stirring, the sealing shell 203 is engaged with the sealing frame 201 through the sealing ring 202, so as to realize the sealing of the extraction tube 10, so as to facilitate making the inside of the extraction tube 10 in a negative pressure state through the negative pressure pump 13; A roller 205 is rotatably connected to the inside of the sealing shell 203, and the roller 205 is attached to the sealing ring 202. A stirring rod 206 is fixedly connected to the end of the rotating shaft of the roller 205. The sealing ring 202 is made of a rubber pad and has elasticity, so as to ensure that the roller 205 can extend out of the sealing shell 203 and fit with the sealing ring 202. When the sealing shell 203 moves along the sealing ring 202, the sealing shell 203 will also drive the roller 205 to roll along the sealing ring 202. At the same time, the roller 205 will also drive the stirring rod 206 to rotate inside the extraction tube 10, the sample tube 14 or the control tube 15, so that the stirring rod 206 can rotate while horizontally moving inside the extraction tube 10, the sample tube 14 or the control tube 15, thus improving the stirring effect and efficiency. The solution can be stirred by the reciprocating stirring of the sealing shell 203 driving the stirring rod 206, and manual oscillation is not required.

[0044] As a further improvement of the present invention, as Figure 11 , Figure 12 , Figure 13 and Figure 14As shown in the figure, the feeding mechanism 3 includes a support frame 301 fixedly connected to the main body 27 of the detector. The top end of the support frame 301 is fixedly connected with a placement rack 314. The inner side of the support frame 301 is fixedly connected with a third motor 303. The end of the main shaft of the third motor 303 is fixedly connected with a first screw rod 304. A push block 305 is spirally connected to the outer side of the first screw rod 304. The push block 305 penetrates the bottom end surface of the placement rack 314 and is slidably connected to the placement rack 314. Both ends of the placement rack 314 are slidably connected with moving rods 310. A connecting rod 309 is fixedly connected between the moving rods 310. A spring 311 is fixedly connected to the inner side of the moving rod 310. The other end of the spring 311 is fixedly connected with a limiting plate 312 slidably connected to the moving rod 310. The other end of the limiting plate 312 is fixedly connected with a guiding column 306 slidably connected to the moving rod 310. The other end of the guiding column 306 is fixedly connected with a clamping block 313. One end of the placement rack 314 is fixedly connected with a fourth motor 307. The end of the main shaft of the fourth motor 307 is fixedly connected with a second screw rod 308 spirally connected to one of the moving rods 310. The inner side of the other moving rod 310 is slidably connected with a guiding shaft 302 fixedly connected to the placement rack 314. The spring 311 can fix the clamping of the colorimetric cuvette 28 through the limiting plate 312 and the guiding column 306. A sliding groove for the push block 305 to slide is opened on the inner side of the bottom end of the placement rack 314, and a groove for placing the colorimetric cuvette 28 is opened on the inner side of the placement rack 314. When it is necessary to transfer the colorimetric cuvette 28 inside the placement rack 314 to the inside of the placement groove 6, first, the third motor 303 drives the first screw rod 304 to rotate spirally inside the push block 305, so that the push block 305 pushes the colorimetric cuvette 28 to move in the direction close to the clamping block 313 until the colorimetric cuvette 28 is clamped by the clamping blocks 313 on both sides. Then, the fourth motor 307 drives the moving rod 310 to move in the direction of the placement groove 6 through the second screw rod 308, so that the moving rod 310 drives the colorimetric cuvette 28 to move above the placement groove 6 through the guiding column 306 and the clamping block 313. After moving above the placement groove 6, the colorimetric cuvette 28 between the clamping blocks 313 can be pressed into the inside of the placement groove 6 through the pressing mechanism 5, and then reset to wait for the next work.

[0045] As a further improvement of the present invention, as Figure 1 and Figure 16As shown in the figure, the pressing mechanism 5 includes a second electric telescopic rod 502 fixedly connected to the detector body 27. The top end of the second electric telescopic rod 502 is fixedly connected with a pressing plate 501. The number of the second electric telescopic rods 502 is two, and they are symmetrically arranged on both sides of the vertical center line of the pressing plate 501. The second electric telescopic rod 502 can drive the pressing plate 501 to move in the vertical direction. When the colorimetric cuvette 28 needs to be transferred to the inside of the placement groove 6, the pressing plate 501 is moved upward to make the placement groove 6 in an open state. When detection is required, the pressing plate 501 is moved downward to cover the colorimetric cuvette 28, so as to ensure that the detector body 27 can detect the colorimetric cuvette 28 normally.

[0046] As a further improvement of the present invention, as Figures 1-16 shown, the steps are as follows: S1: Place the sample inside the feeding mechanism 1 to cut it into pieces and convey it to the inside of the extraction tube 10 for weighing. At the same time, the colorimetric cuvette 28 can also be placed inside the placement groove 6 through the cooperation of the feeding mechanism 3 and the pressing mechanism 5; S2: Then, open the solenoid valve 19 outside the third liquid outlet pipe 26, so that the water pump 16 adds the buffer solution inside the fourth storage cylinder 23 to the inside of the extraction tube 10 through the first liquid outlet pipe 17 and the third liquid outlet pipe 26, and then stir and mix it through the stirring rod 206 inside the extraction tube 10. At the same time, the buffer solution inside the fourth storage cylinder 23 can also be added to the control tube 15 through the first liquid outlet pipe 17, and the flowmeter 18 will also monitor the amount of the buffer solution added; S3: After the buffer solution inside the extraction tube 10 is stirred and mixed with the sample, the sealing shell 203 on the extraction tube 10 is engaged with the sealing frame 201 through the sealing ring 202. Then, the negative pressure pump 13 makes the inside of the extraction tube 10 in a negative pressure state, so that the bubbles inside the extraction tube 10 quickly escape, reducing the standing time; S4: After standing, the liquid to be detected inside the extraction tube 10 is added to the sample tube 14 through the first liquid outlet pipe 17, the flowmeter 18 and the solenoid valve 19 by the corresponding water pump 16; S5: Through the corresponding water pump 16, the first liquid outlet pipe 17, the second liquid outlet pipe 25, the flowmeter 18 and the solenoid valve 19, the cholinesterase in the third storage cylinder 22 and the chromogenic agent in the second storage cylinder 21 are simultaneously added to the inside of the control tube 15 and the sample tube 14, and are stirred and mixed by the stirring rods 206 inside the control tube 15 and the sample tube 14. Then, the negative pressure pump 13 makes the inside of the control tube 15 and the sample tube 14 in a negative pressure state, so that the bubbles inside the control tube 15 and the sample tube 14 quickly escape, reducing the standing time; S6: Through the corresponding water pump 16, the first liquid outlet pipe 17, the second liquid outlet pipe 25, the flowmeter 18 and the solenoid valve 19, the substrate reagent in the first storage cylinder 20 is added to the control tube 15 and the sample tube 14; S7: When the colorimetric cell 28 is pushed between the two clamping blocks 313 by the feeding mechanism 3, the colorimetric cell 28 is then positioned below the outlet of the first liquid discharge pipe 17 on the side of the sample tube 14 and the control tube 15. Then, the test solution and the control solution in the sample tube 14 and the control tube 15 are respectively added to the corresponding colorimetric cells 28 (one colorimetric cell 28 corresponds to the sample tube 14 and the control tube 15 respectively); S8: The colorimetric cell 28 is shielded and sealed by the pressing mechanism 5, and then detected by the main body 27 of the detector; A switchable door is provided on one side of the box body 7. During the detection of the test solution and the control solution by the main body 27 of the detector, the staff can open the door, and then clean other components in contact with the solution, such as the cutting cylinder 101, the transfer box 103, the extraction tube 10, the sample tube 14, and the control tube 15, for the next use.

[0047] The above is a preferred embodiment of the present invention. The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the protection scope of the present invention, the present invention will have various changes and improvements. These changes and improvements fall within the scope of the present invention claimed. The protection scope claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid detection device for pesticide residues in food, characterized in that: It includes a detector main body (27) and a box body (7), and is characterized in that: a placement groove (6) is provided inside the detector main body (27), one end of the detector main body (27) is fixedly connected to the box body (7), a feeding mechanism (3) is fixedly connected to one end of the detector main body (27), a colorimetric dish (28) is placed inside the feeding mechanism (3), a pressing mechanism (5) is arranged above the placement groove (6), a first support plate (8) and a second support plate (9) are fixedly connected inside the box body (7), a weighing sensor (11) is fixedly connected inside the second support plate (9), baffles (12) fixedly connected to the second support plate (9) are arranged around the weighing sensor (11), an extraction tube (10) is placed on the upper surface of the weighing sensor (11), a sample tube (14) and a control tube (15) are respectively screwed inside the first support plate (8), sealing and stirring mechanisms (2) are fixedly connected to the tops of the extraction tube (10), the sample tube (14) and the control tube (15), a feeding mechanism (1) is screwed inside the top inner side of the box body (7), and one end of the sealing and stirring mechanism (2) fixedly connected to the sample tube (14) and the control tube (15) is fixedly connected to a power mechanism (4), and a negative pressure pump (13) is communicated with one end of each of the extraction tube (10), the sample tube (14) and the control tube (15).

2. The rapid detection device for pesticide residues in food according to claim 1, wherein: A first storage cylinder (20), a second storage cylinder (21), a third storage cylinder (22) and a fourth storage cylinder (23) are placed inside the box body (7), a water pump (16) is communicated with one end of each of the extraction tube (10), the first storage cylinder (20), the second storage cylinder (21), the third storage cylinder (22) and the fourth storage cylinder (23), a first liquid outlet pipe (17) is communicated with the outlet end of the water pump (16), one end of the first liquid outlet pipe (17) on one side of the first storage cylinder (20), the second storage cylinder (21), the third storage cylinder (22) and the fourth storage cylinder (23) is communicated with a second liquid outlet pipe (25), and one end of the first liquid outlet pipe (17) on one side of the fourth storage cylinder (23) is also communicated with a third liquid outlet pipe (26), flow meters (18) and electromagnetic valves (19) are communicated with the outer sides of the first liquid outlet pipe (17), the second liquid outlet pipe (25) and the third liquid outlet pipe (26), and one-way valves (24) are communicated with the top inner sides of the first storage cylinder (20), the second storage cylinder (21), the third storage cylinder (22) and the fourth storage cylinder (23).

3. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The blanking mechanism (1) includes a cutting cylinder (101) helically connected to the box body (7). A cutting knife (102) is arranged inside the cutting cylinder (101). The outer bottom end of the cutting cylinder (101) communicates with a transfer box (103). A blanking port (106) is formed in the inner bottom end of the transfer box (103). A slide rail (108) is slidably connected to the inner bottom end of the transfer box (103). A blocking plate (107) is fixedly connected to the bottom end of the slide rail (108). A first rack (109) is fixedly connected to the bottom end of the blocking plate (107). A first motor (104) is fixedly connected to one end of the transfer box (103). The end of the main shaft of the first motor (104) is fixedly connected to an extrusion shell (105) rotatably connected to the transfer box (103).

4. The rapid detection device for pesticide residues in food according to claim 3, characterized in that: A first electric telescopic rod (110) is rotatably connected to one end of the transfer box (103). The other end of the first electric telescopic rod (110) is rotatably connected to a connecting rod (111) rotatably connected to the transfer box (103). The other end of the connecting rod (111) is rotatably connected to a second motor (112). The end of the main shaft of the second motor (112) is fixedly connected to a first gear (113).

5. The rapid detection device for pesticide residues in food according to claim 1, wherein: The sealing and stirring mechanism (2) includes a sealing frame (201) fixedly connected to the tops of the extraction pipe (10), the sample pipe (14), and the control pipe (15). A sealing ring (202) is fixedly connected to the inner wall of the sealing frame (201). A sealing shell (203) is slidably connected to the inner side of one end of the sealing frame (201) and the sealing ring (202). A second rack (204) is fixedly connected to the inner top end of the sealing shell (203). A roller (205) is rotatably connected to the inside of the sealing shell (203), and the roller (205) is in contact with the sealing ring (202). A stirring rod (206) is fixedly connected to the end of the rotating shaft of the roller (205).

6. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The feeding mechanism (3) includes a support frame (301) fixedly connected to the detector main body (27). A placement rack (314) is fixedly connected to the top end of the support frame (301). A third motor (303) is fixedly connected to the inside of the support frame (301). The end of the main shaft of the third motor (303) is fixedly connected to a first screw rod (304). A push block (305) is helically connected to the outside of the first screw rod (304). The push block (305) penetrates the bottom end surface of the placement rack (314) and is slidably connected to the placement rack (314). Moving rods (310) are slidably connected to both ends of the placement rack (314). A connecting rod (309) is fixedly connected between the moving rods (310). A spring (311) is fixedly connected to the inside of the moving rod (310). The other end of the spring (311) is fixedly connected to a limiting plate (312) slidably connected to the moving rod (310). The other end of the limiting plate (312) is fixedly connected to a guiding column (306) slidably connected to the moving rod (310). The other end of the guiding column (306) is fixedly connected to a clamping block (313).

7. The rapid detection device for pesticide residues in food according to claim 6, characterized in that: One end of the placement rack (314) is fixedly connected to a fourth motor (307). The end of the main shaft of the fourth motor (307) is fixedly connected to a second screw rod (308) that is helically connected to one of the moving rods (310). The inner side of the other moving rod (310) is slidably connected to a guide shaft (302) fixedly connected to the placement rack (314).

8. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The power mechanism (4) includes a fifth motor (401) fixedly connected to a sealing frame (201) provided on one side of the control tube (15) and the sample tube (14). The end of the main shaft of the fifth motor (401) is fixedly connected to a second gear (402).

9. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The pressing mechanism (5) includes a second electric telescopic rod (502) fixedly connected to the detector main body (27). The top end of the second electric telescopic rod (502) is fixedly connected to a pressing plate (501).

10. The method for using a rapid detection device for pesticide residues in food according to claim 2, wherein: S1: Place the sample inside the feeding mechanism (1) to cut it into pieces and convey it to the inside of the extraction tube (10) for weighing. At the same time, the colorimetric cuvette (28) can also be placed inside the placement groove (6) through the cooperation of the feeding mechanism (3) and the pressing mechanism (5). S2: Add the buffer solution inside the fourth storage cylinder (23) to the inside of the extraction tube (10), and then stir and mix. At the same time, the buffer solution inside the fourth storage cylinder (23) can also be added to the control tube (15). S3: After mixing, use the negative pressure pump (13) to make the inside of the extraction tube (10) in a negative pressure state, so that the bubbles inside the extraction tube (10) quickly escape, reducing the standing time. S4: Add the test solution inside the extraction tube (10) to the sample tube (14). S5: Add the cholinesterase in the third storage cylinder (22) and the chromogenic agent in the second storage cylinder (21) to the inside of the control tube (15) and the sample tube (14) simultaneously, and then stir. Then, the negative pressure pump (13) makes the inside of the control tube (15) and the sample tube (14) in a negative pressure state, so that the bubbles inside the control tube (15) and the sample tube (14) quickly escape, reducing the standing time. S6: Add the substrate reagent in the first storage cylinder (20) to the control tube (15) and the sample tube (14). S7: Then add the test solutions in the control tube (15) and the sample tube (14) to the corresponding colorimetric cuvettes (28). S8: Use the pressing mechanism (5) to block and seal the colorimetric cuvette (28), and then perform detection through the detector main body (27).

Images