A rapid detection device for pesticide residues in food and its use method

Abstract

The present invention discloses a rapid detection device for pesticide residues in food and a method for using the same, relating to the technical field of food detection. The device comprises a detector main body and a box body, wherein a placement slot is provided on the inner side of 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 loading mechanism, a cuvette is placed on the inner side of the loading mechanism, and a pressing mechanism is provided above the placement slot. The integrated design realizes full process automation from sample pretreatment to detection, effectively solves the problems of cumbersome operation and low efficiency of traditional methods, improves overall detection efficiency, and 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 in particular to a rapid detection device for pesticide residues in food and a method for using the device. Background Art

[0002] The pesticide residue detector is based on the inhibitory effect of pesticides in the sample on the activity of cholinesterase, which affects the speed of the color reaction. The pesticide residue (i.e., inhibition rate) is measured by measuring the color reaction speed. The pesticide residue in the sample - inhibition rate can be directly displayed on the LCD screen, and the test results can be directly printed out. Before conducting pesticide testing on food, it is necessary to process the food first, which mainly includes the following steps: 1) cutting; 2) weighing; 3) transferring to a test tube; 4) passing through the test tube containing the sample. 1) Add quantitative buffer via pipette, shake and extract for one minute, then let it stand for at least 10 minutes; 5) Take buffer via pipette and add it to the control tube; 6) Add the test solution in the test tube to the sample tube via pipette; 7) Add cholinesterase to the control tube and sample tube via pipette; 8) Then add the color developer to the control tube and sample tube, shake well and let it stand for 10 minutes; 9) Add the substrate reagent to the control tube and sample tube; 10) Then pour the reagents in the control tube and sample tube into the cuvette and load it on the instrument for detection.

[0003] Current mainstream pesticide residue detectors generally lack automatic sample processing functions, requiring staff to manually complete multiple operations such as sampling, pretreatment, and sample addition. This process is not only cumbersome (such as involving multiple steps of manual intervention such as reagent preparation, oscillation extraction, and centrifugal separation), but is also prone to human operational errors that affect the accuracy of test results and extend the single test cycle. Therefore, to address the above problems, a rapid detection device for pesticide residues in food and a method for its use are proposed. Summary of the Invention

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

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A rapid detection device for pesticide residues in food and a method of using the same, comprising a detector body and a box body, wherein a placement slot is provided on the inner side of the detector body, one end of the detector body is fixedly connected to the box body, one end of the detector body is fixedly connected to a loading mechanism, a cuvette is placed on the inner side of the loading mechanism, a pressing mechanism is provided above the placement slot, a first support plate and a second support plate are fixedly connected to the inner side of the box body, a weighing sensor is fixedly connected to the inner side of the second support plate, a baffle fixedly connected to the second support plate is provided around the weighing sensor, an extraction tube is placed above the weighing sensor, a sample tube and a control tube are spirally connected to the inner side of the first support plate, the top ends of the extraction tube, the sample tube and the control tube are all fixedly connected to a sealing stirring mechanism, a feeding mechanism is spirally connected to the inner side of the top end of the box body, one end of the sealing stirring mechanism fixedly connected to the sample tube and the control tube is fixedly connected to a power mechanism, and one end of the extraction tube, the sample tube and the control tube are all connected to a negative pressure pump.

[0007] Preferably, a first storage cylinder, a second storage cylinder, a third storage cylinder and a fourth storage cylinder are placed on the inner side of the box body, one end of the extraction tube, the first storage cylinder, the second storage cylinder, the third storage cylinder and the fourth storage cylinder are all connected to a water pump, the outlet end of the water pump is connected to a first liquid outlet pipe, one end of the first liquid outlet pipe on one side of the first storage cylinder, the second storage cylinder, the third storage cylinder and the fourth storage cylinder is connected to the second liquid outlet pipe, one end of the first liquid outlet pipe on the side of the fourth storage cylinder is also connected to the third liquid outlet pipe, the outsides of the first liquid outlet pipe, the second liquid outlet pipe and the third liquid outlet pipe are all connected to a flow meter and a solenoid valve, and the inner sides of the top ends of the first storage cylinder, the second storage cylinder, the third storage cylinder and the fourth storage cylinder are connected to a one-way valve.

[0008] Preferably, the unloading mechanism includes a cutting cylinder spirally connected to the box body, a cutting knife is provided on the inner side of the cutting cylinder, the outer side of the bottom end of the cutting cylinder is connected to a transfer box, the inner side of the bottom end of the transfer box is provided with a unloading port, the inner side of the bottom end of the transfer box is slidably connected to a slide rail, the bottom end of the slide rail is fixedly connected to a blocking plate, the bottom end of the blocking plate is fixedly connected to a first rack, one end of the transfer box is fixedly connected to a first motor, and the end of the main shaft of the first motor is fixedly connected to an extrusion shell rotatably connected to the transfer box.

[0009] Preferably, one end of the transfer box is rotatably connected to a first electric telescopic rod, 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, and the end of the main shaft of the second motor is fixedly connected to a first gear.

[0010] Preferably, the sealing stirring mechanism includes a sealing frame fixedly connected to the top of the extraction tube, the sample tube and the control tube, the inner wall of the sealing frame is fixedly connected to a sealing ring, the inner side of one end of the sealing frame and the sealing ring is slidingly connected to a sealing shell, the inner side of the top of the sealing shell is fixedly connected to a second rack, the inner side of the sealing shell is rotatably connected to a roller, and the roller is in contact with the sealing ring, and the end of the rotating shaft of the roller is fixedly connected to a stirring rod.

[0011] Preferably, the loading mechanism includes a support frame fixedly connected to the detector body, the top of the support frame is fixedly connected to the placement frame, the inner side of the support frame is fixedly connected to the third motor, the main shaft end of the third motor is fixedly connected to the first screw, the outer side of the first screw is spirally connected to the push block, the push block passes through the bottom end surface of the placement frame and is slidably connected to the placement frame, both ends of the placement frame are slidably connected to the moving rod, the moving rods are fixedly connected with a connecting rod, the inner side of the moving rod is fixedly connected with a spring, the other end of the spring is fixedly connected to a limit plate slidably connected to the moving rod, the other end of the limit plate is fixedly connected to a guide column slidably connected to the moving rod, and the other end of the guide column is fixedly connected to a clamping block.

[0012] Preferably, one end of the placement rack is fixedly connected to a fourth motor, the end of the main shaft of the fourth motor is fixedly connected to a second screw rod spirally connected to one of the moving rods, and the inner side of the other moving rod is slidably connected to a guide shaft fixedly connected to the placement rack.

[0013] Preferably, the power mechanism includes a fifth motor fixedly connected to a sealing frame provided on one side of the control tube and the sample tube, and a second gear is fixedly connected to the end of the main shaft of the fifth motor.

[0014] Preferably, the pressing mechanism includes a second electric telescopic rod fixedly connected to the detector body, and a pressing plate is fixedly connected to the top end of the second electric telescopic rod.

[0015] Preferably, S1: placing the sample inside the unloading mechanism, chopping it, and transporting it to the inside of the extraction tube for weighing. At the same time, the cuvette can be placed inside the placement tank through the cooperation of the loading mechanism and the pressing mechanism;

[0016] S2: Add the buffer solution in the fourth storage cylinder to the inner side of the extraction tube and stir to mix. At the same time, the buffer solution in the fourth storage cylinder can also be added to the control tube.

[0017] S3: After mixing, the inside of the extraction tube is placed in a negative pressure state through a negative pressure pump, so that the bubbles inside the extraction tube can escape quickly and the standing time can be reduced;

[0018] S4: Add the test solution inside the extraction tube into the sample tube;

[0019] S5: Add cholinesterase from the third storage tube and the color developer from the second storage tube to the inner sides of the control tube and the sample tube at the same time, then stir. Then, a negative pressure pump is used to put the inner sides of the control tube and the sample tube into a negative pressure state, so that bubbles in the control tube and the sample tube can escape quickly, thereby reducing the standing time.

[0020] S6: adding the substrate reagent in the first storage cylinder to the control tube and the sample tube;

[0021] S7: Then add the test solution in the control tube and the sample tube into the corresponding cuvette;

[0022] S8: The colorimetric cell is sealed by pressing the mechanism, and then tested by the detector body.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. A rapid detection device for pesticide residues in food and its use method. The device's built-in feeding mechanism can automatically chop and quantitatively feed food samples. The chopped samples gradually fall into an extraction tube. By adjusting the number of feeding ports opened, precise control can be achieved when the sample approaches a specified weight. When the sample weight approaches a threshold, the system automatically switches to a single feeding port for micro-feeding, avoiding the overweight problem caused by multiple feeding ports working simultaneously, significantly improving feeding accuracy. This design eliminates the need for manual cutting, weighing, and sample transfer, simplifying the operating process, reducing human error, and greatly improving detection efficiency.

[0025] 2. A rapid detection device for pesticide residues in food and a method for using the same. A sealed stirring mechanism is provided to quickly stir the solutions inside the extraction tube, sample tube, and control tube without manual shaking. After shaking, the openings of the extraction tube, sample tube, and control tube are sealed by a sealing shell, and the gas inside the extraction tube, sample tube, and control tube is extracted by a negative pressure pump, so that the inside of the extraction tube, sample tube, and control tube is in a negative pressure state, so that bubbles in the extraction tube, sample tube, and control tube can be quickly removed, thereby reducing the standing time, speeding up the detection process, and eliminating the need for manual shaking, thereby improving overall work efficiency.

[0026] 3. A rapid detection device for pesticide residues in food and a method for using the same. Through the cooperation of the feeding mechanism and the pressing mechanism, the cuvettes can be placed one by one into the inner side of the placement slot, without the need for manual placement, which is convenient for staff to use and thus improves the overall detection efficiency. During the detection, the pressing mechanism can also shield the cuvettes to ensure the normal operation of the monitor body.

[0027] In summary, a rapid detection device for pesticide residues in food and its use method have the following innovative advantages: First, the device has a built-in intelligent feeding mechanism that can automatically complete the precise chopping, quantitative feeding and transfer of samples, and achieve high-precision weighing through the coordinated control of multiple feeding ports, avoiding the problem of overweight and greatly reducing manual operation errors; secondly, a sealed stirring mechanism is used 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 placement and positioning of the cuvette is achieved, which not only ensures the normal operation of the detector, but also improves the convenience of operation. This integrated design realizes the automation of the entire process from sample pretreatment to detection, effectively solving the problems of cumbersome operation and low efficiency of traditional methods, improving the overall detection efficiency, and is particularly suitable for the rapid screening of batch samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Figure 1 The present invention is a schematic diagram of the overall structure of a rapid detection device for pesticide residues in food and its use method.

[0030] Figure 2 The present invention is a schematic diagram of the internal installation structure of a box of a rapid detection device for pesticide residues in food and a method of using the same.

[0031] Figure 3 This is a schematic diagram of the installation structure of the first motor of a rapid detection device for pesticide residues in food and a method of using the same according to the present invention.

[0032] Figure 4 The present invention provides a schematic diagram of the installation structure of a feed port of a rapid detection device for pesticide residues in food and a method for using the same.

[0033] Figure 5 The present invention provides a schematic diagram of the installation structure of a slide rail of a rapid detection device for pesticide residues in food and a method for using the same.

[0034] Figure 6 The present invention provides a schematic diagram of the installation structure of the first electric telescopic rod of a rapid detection device for pesticide residues in food and a method of using the same.

[0035] Figure 7 The present invention provides a schematic diagram of the installation structure of an extraction tube of a rapid detection device for pesticide residues in food and a method for using the same.

[0036] Figure 8 The present invention is a schematic diagram of the internal installation structure of a sealed shell of a rapid detection device for pesticide residues in food and a method for using the same.

[0037] Figure 9 The present invention provides a schematic diagram of the installation structure of a control tube of a rapid detection device for pesticide residues in food and a method for using the same.

[0038] Figure 10 The present invention provides a schematic structural diagram of a power mechanism of a rapid detection device for pesticide residues in food and a method for using the same.

[0039] Figure 11 The present invention provides a schematic diagram of the installation structure of a push block of a rapid detection device for pesticide residues in food and a method for using the same.

[0040] Figure 12 The present invention is a schematic diagram of the installation structure of the first screw of a rapid detection device for pesticide residues in food and a method for using the same.

[0041] Figure 13 The present invention provides a schematic diagram of the installation structure of the second screw of a rapid detection device for pesticide residues in food and a method for using the same.

[0042] Figure 14 The present invention provides a schematic diagram of the installation structure of a clamping block of a rapid detection device for pesticide residues in food and a method for using the same.

[0043] Figure 15 The present invention provides a schematic diagram of the installation structure of a one-way valve of a rapid detection device for pesticide residues in food and a method for using the same.

[0044] Figure 16 The present invention is a schematic diagram of a pressing mechanism structure of a rapid detection device for pesticide residues in food and a method for using the same.

[0045] In the figure: 1. feeding mechanism; 101. cutting cylinder; 102. cutting blade; 103. transfer box; 104. first motor; 105. extrusion shell; 106. feeding port; 107. blocking plate; 108. slide rail; 109. first rack; 110. first electric telescopic rod; 111. connecting rod; 112. second motor; 113. first gear;

[0046] 2. Sealing and stirring mechanism; 201. Sealing frame; 202. Sealing ring; 203. Sealing shell; 204. Second rack; 205. Rotating roller; 206. Stirring rod;

[0047] 3. Feeding mechanism; 301. Support frame; 302. Guide shaft; 303. Third motor; 304. First screw; 305. Push block; 306. Guide column; 307. Fourth motor; 308. Second screw; 309. Connecting rod; 310. Moving rod; 311. Spring; 312. Limiting plate; 313. Clamping block; 314. Placement frame;

[0048] 4. Power mechanism; 401. Fifth motor; 402. Second gear;

[0049] 5. Pressing mechanism; 501. Pressing plate; 502. Second electric telescopic rod

[0050] 6. Placement tank; 7. Box body; 8. First support plate; 9. Second support plate; 10. Extraction tube; 11. Weighing sensor; 12. Baffle; 13. Negative pressure pump; 14. Sample tube; 15. Control tube; 16. Water pump; 17. First liquid outlet pipe; 18. Flow meter; 19. Solenoid valve; 20. First storage cylinder; 21. Second storage cylinder; 22. Third storage cylinder; 23. Fourth storage cylinder; 24. One-way valve; 25. Second liquid outlet pipe; 26. Third liquid outlet pipe; 27. Detector body; 28. Cuvette. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with specific embodiments. The accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual drawings. They should not be understood as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0052] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, in the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The present invention will be further elaborated below in conjunction with specific embodiments.

[0053] Example

[0054] like Figures 1-16 As shown, a rapid detection device for pesticide residues in food and a method for using the same include a detector body 27 and a box body 7. A PLC control system is integrated inside the detector body 27, and the automated and orderly operation of the electrical components of the device is achieved through a preset program. A placement slot 6 is provided on the inner side of the detector body 27, and the placement slot 6 is used to store a cuvette. One end of the detector body 27 is fixedly connected to the box body 7, and one end of the detector body 27 is fixedly connected to a feeding mechanism 3. A cuvette 28 is placed inside the feeding mechanism 3, and the cuvette 28 is used to store the mixed The liquid to be tested and the contrast liquid; a pressing mechanism 5 is provided above the placement groove 6, and a first support plate 8 and a second support plate 9 are fixedly connected to the inner side of the box body 7. A weighing sensor 11 is fixedly connected to the inner side of the second support plate 9. The weighing sensor 11 can accurately measure the weight of the required sample. The weighing sensor 11 is surrounded by a baffle 12 fixedly connected to the second support plate 9. The baffle 12 limits the extraction tube 10 to ensure the stability of the extraction tube 10 when working. The extraction tube 10 is placed above the weighing sensor 11, and the first support plate The inner side of the box 8 is spirally connected to the sample tube 14 and the control tube 15, and the top of the extraction tube 10, the sample tube 14 and the control tube 15 are fixedly connected to the sealed stirring mechanism 2. The top inner side of the box body 7 is spirally connected to the feeding mechanism 1, and one end of the sealed stirring mechanism 2 fixedly connected to the sample tube 14 and the control tube 15 is fixedly connected to the power mechanism 4. The extraction tube 10, the sample tube 14 and the control tube 15 are connected to the negative pressure pump 13 at one end. The negative pressure pump 13 is connected to the extraction tube 10, the sample tube 14 and the control tube 15 through a vacuum rubber tube. The vacuum rubber tube The tube is flexible and easy to bend, and 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 on the outside of 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 put the inside of the extraction tube 10, the sample tube 14 and the control tube 15 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, speeding up the detection process, and eliminating the need for manual shaking, thereby improving overall work efficiency.

[0055] As a further improvement of the present invention, Figure 2 and Figure 15As shown, the first storage cylinder 20, the second storage cylinder 21, the third storage cylinder 22 and the fourth storage cylinder 23 are placed on the inner side of the box body 7, and one end 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 the water pump 16, and the outlet end of the water pump 16 is connected to the first liquid outlet pipe 17. One end of the first liquid outlet pipe 17 on the 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 the second liquid outlet pipe 25, and one end of the first liquid outlet pipe 17 on the side of the fourth storage cylinder 23 is also connected to the third liquid outlet pipe 26. The outsides of the first liquid outlet pipe 17, the second liquid outlet pipe 25 and the third liquid outlet pipe 26 are all connected to the flow meter 18 and the electric The magnetic valve 19, 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 are connected to the one-way valve 24. The inner sides of 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, color developers, cholinesterase and buffers. The flow meter 18 monitors the filling amount of each reagent (substrate reagent, color developer, cholinesterase, buffer) in real time to ensure that it meets the testing standards. The solenoid valve 19 can control the opening and closing of the first liquid outlet pipe 17, the second liquid outlet pipe 25 and the third liquid outlet pipe 26. At the same time, the shape and pipeline layout of the first liquid outlet pipe 17, the second liquid outlet pipe 25 and the third liquid outlet pipe 26 can be designed according to actual installation and use.

[0056] As a further improvement of the present invention, Figure 2 、 Figure 3 and Figure 4As shown, the unloading mechanism 1 includes a cutting cylinder 101 spirally connected to the box body 7, a cutting knife 102 is provided on the inner side of the cutting cylinder 101, the outer side of the bottom end of the cutting cylinder 101 is connected to the transfer box 103, the inner side of the bottom end of the transfer box 103 is provided with a unloading port 106, the inner side of the bottom end of the transfer box 103 is slidably connected to a slide rail 108, the bottom end of the slide rail 108 is fixedly connected to a blocking plate 107, the bottom end of the blocking plate 107 is fixedly connected to a first rack 109, one end of the transfer box 103 is fixedly connected to a first motor 104, the main shaft end 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, and the cutting knife 102 can cut the sample inside the cutting cylinder 101 into pieces, and the cut sample will fall into the inner side of the transfer box 103, and the sample inside the transfer box 103 needs to be cut into pieces. When adding to the inner side of the extraction tube 10, at the beginning of adding, the blocking plate 107 is completely removed from under the discharge port 106, so that multiple discharge ports 106 work at the same time, and at the same time, the first motor 104 drives the extrusion shell 105 to rotate to the inside of the transfer box 103 and squeeze the sample, so that the sample falls out through the discharge port 106, and the fallen sample falls to the inner side of the extraction tube 10 through the sealing frame 201 below. At the same time, the weighing sensor 11 monitors the weight of the sample inside the weighing sensor 11 in real time. When it approaches the set weight threshold, the blocking plate 107 blocks the other discharge ports 106, leaving only one discharge port 106 working, avoiding the overweight problem caused by multiple discharge ports 106 working at the same time, and significantly improving the discharge 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.

[0057] As a further improvement of the present invention, Figure 4 and Figure 6 As shown, one end of the transfer box 103 is rotatably connected to the first electric telescopic rod 110, and the other end of the first electric telescopic rod 110 is rotatably connected to the connecting rod 111 rotatably connected to the transfer box 103, and the other end of the connecting rod 111 is rotatably connected to the second motor 112, and the end of the main shaft of the second motor 112 is fixedly connected to the first gear 113. When it is necessary to move the blocking plate 107, the first electric telescopic rod 110 adjusts the position of the second motor 112 and the first gear 113 through the connecting rod 111, so that the first gear 113 is engaged with the first rack 109, and then the first gear 113 is driven by the second motor 112 to rotate forward or reverse, so that the first gear 113 moves at the bottom of the transfer box 103 through the first rack 109, so that the blocking plate 107 adjusts the number of materials discharged from the discharge port 106.

[0058] As a further improvement of the present invention, Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, the sealing stirring mechanism 2 includes a sealing frame 201 fixedly connected to the top of the extraction tube 10, the sample tube 14 and the control tube 15. The inner wall of the sealing frame 201 is fixedly connected to a sealing ring 202. The inner side of one end of the sealing frame 201 and the sealing ring 202 is slidably connected to a sealing shell 203. The inner side of the top of the sealing shell 203 is fixedly connected to a second rack 204. The power mechanism 4 includes a fifth motor 401 fixedly connected to the sealing frame 201 arranged 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 the second gear 402. When the extraction tube 10 needs to be moved, the sample tube 14 needs to be moved. When the sealed housing 203 on the sample tube 14 and the control tube 15 side slides inside the sealing frame 201, the first electric telescopic rod 110 adjusts the position of the second motor 112 and the first gear 113 via the connecting rod 111, so that the first gear 113 and the second rack 204 are meshed together. Then, the first gear 113 can move the sealed housing 203 via the second rack 204. When the sealed housing 203 on the sample tube 14 and the control tube 15 side needs to be slid inside the sealing frame 201, the fifth motor 401 moves the corresponding sealed housing 203 via the second gear 402 and the second rack 204.

[0059] When it is necessary to add the chopped sample to the inner side of the extraction tube 10 or add solution to the inner side of the sample tube 14 and the control tube 15, the sealing shell 203 is moved out from the inner side of the sealing frame 201, so that the sample can fall into the inner side of the extraction tube 10 through the sealing frame 201. When it is left to stand after stirring, the sealing shell 203 is engaged with the sealing frame 201 through the sealing ring 202, thereby sealing the extraction tube 10, making it easier to put the inner side of the extraction tube 10 in a negative pressure state through the negative pressure pump 13; the inner side of the sealing shell 203 is rotatably connected to a roller 205, and the roller 205 is in contact with the sealing ring 202. The end of the rotating shaft of the roller 205 is fixedly connected to the stirring rod 206. The sealing ring 202 is The rubber pad is made of elasticity, thereby ensuring that the roller 205 can extend from the inner side 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 roll along the sealing ring 202 with the roller 205. At the same time, the roller 205 will also rotate the stirring rod 206 inside the extraction tube 10, the sample tube 14 or the control tube 15, so that the stirring rod 206 can rotate while moving horizontally inside the extraction tube 10, the sample tube 14 or the control tube 15, thereby improving the stirring effect and efficiency. The reciprocating stirring of the stirring rod 206 by the sealing shell 203 can achieve stirring of the solution without manual oscillation.

[0060] As a further improvement of the present invention, Figure 11 、 Figure 12 、 Figure 13 and Figure 14As shown, the feeding mechanism 3 includes a support frame 301 fixedly connected to the detector body 27, the top of the support frame 301 is fixedly connected to the placement frame 314, the inner side of the support frame 301 is fixedly connected to the third motor 303, the spindle end of the third motor 303 is fixedly connected to the first screw 304, the outer side of the first screw 304 is spirally connected to the push block 305, the push block 305 passes through the bottom end surface of the placement frame 314 and is slidably connected to the placement frame 314, both ends of the placement frame 314 are slidably connected to the moving rod 310, the moving rod 310 is fixedly connected with the connecting rod 309, the inner side of the moving rod 310 A spring 311 is fixedly connected, the other end of the spring 311 is fixedly connected to a limit plate 312 slidably connected to the moving rod 310, the other end of the limit plate 312 is fixedly connected to a guide column 306 slidably connected to the moving rod 310, and the other end of the guide column 306 is fixedly connected to a clamping block 313; one end of the placement frame 314 is fixedly connected to the fourth motor 307, the spindle end of the fourth motor 307 is fixedly connected to a second screw 308 helically connected to one of the moving rods 310, and the inner side of the other moving rod 310 is slidably connected to the guide shaft 302 fixedly connected to the placement frame 314;

[0061] The spring 311 enables the clamping block 313 to clamp and fix the colorimetric cell 28 through the limit plate 312 and the guide column 306. The bottom inner side of the placement rack 314 is provided with a slide groove for the push block 305 to slide, and the inner side of the placement rack 314 is provided with a groove for placing the colorimetric cell 28. When the colorimetric cell 28 inside the placement rack 314 needs to be transferred to the inner side of the placement slot 6, the third motor 303 is first driven by the first screw 304 to spirally rotate on the inner side of the push block 305, so that the push block 305 pushes the colorimetric cell 28 Move toward the clamping block 313 until the cuvette 28 is clamped by the clamping blocks 313 on both sides, and then the fourth motor 307 moves the moving rod 310 toward the placement slot 6 through the second screw 308, so that the moving rod 310 moves to the top of the placement slot 6 with the cuvette 28 through the guide column 306 and the clamping block 313. After moving to the top of the placement slot 6, the cuvette 28 between the clamping blocks 313 can be pressed to the inner side of the placement slot 6 through the pressing mechanism 5, and then reset to wait for the next work.

[0062] As a further improvement of the present invention, Figure 1 and Figure 16As shown, the pressing mechanism 5 includes a second electric telescopic rod 502 fixedly connected to the detector body 27, and the top of the second electric telescopic rod 502 is fixedly connected to a pressure plate 501. There are two second electric telescopic rods 502, and they are symmetrically arranged on both sides of the vertical center line of the pressure plate 501. The second electric telescopic rod 502 can move the pressure plate 501 in the vertical direction. When the cuvette 28 needs to be transferred to the inner side of the placement slot 6, the pressure plate 501 is moved upward to make the placement slot 6 open. When detection is required, the pressure plate 501 is moved downward and covers the cuvette 28, thereby ensuring that the detector body 27 can detect the cuvette 28 normally.

[0063] As a further improvement of the present invention, Figure 1-16 As shown, the steps are as follows:

[0064] S1: The sample is placed inside the unloading mechanism 1, chopped, and transported to the inside of the extraction tube 10 for weighing. At the same time, the cuvette 28 can be placed inside the placement tank 6 through the cooperation of the loading mechanism 3 and the pressing mechanism 5;

[0065] S2: Next, the solenoid valve 19 outside the third liquid outlet pipe 26 is opened, allowing the water pump 16 to add 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. The solution is then stirred and mixed by the stirring rod 206 inside the extraction tube 10. At the same time, the buffer solution inside the fourth storage cylinder 23 is also added to the control tube 15 through the first liquid outlet pipe 17. At the same time, the flow meter 18 also monitors the amount of buffer solution added.

[0066] 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 via the sealing ring 202. Then, the negative pressure pump 13 is used to create a negative pressure inside the extraction tube 10, allowing bubbles inside the extraction tube 10 to escape quickly and reducing the static time.

[0067] S4: After the standing is completed, the liquid to be tested in the extraction tube 10 is added to the sample tube 14 through the first liquid outlet pipe 17, the flow meter 18 and the solenoid valve 19 by the corresponding water pump 16;

[0068] S5: Cholinesterase in the third storage cylinder 22 and the color developer in the second storage cylinder 21 are added to the inner sides of the control tube 15 and the sample tube 14 simultaneously through the corresponding water pump 16, the first liquid outlet pipe 17, the second liquid outlet pipe 25, the flow meter 18 and the solenoid valve 19. The mixture is stirred by the stirring rod 206 inside the control tube 15 and the sample tube 14. Then, the negative pressure pump 13 puts the inner sides of the control tube 15 and the sample tube 14 into a negative pressure state, so that the bubbles inside the control tube 15 and the sample tube 14 can escape quickly, thereby reducing the static time;

[0069] S6: Add the substrate reagent in the first storage cylinder 20 to the control tube 15 and the sample tube 14 through the corresponding water pump 16, the first liquid outlet pipe 17, the second liquid outlet pipe 25, the flow meter 18 and the solenoid valve 19;

[0070] S7: When the cuvette 28 is pushed between the two clamping blocks 313 by the loading mechanism 3, the cuvette 28 is now below the outlet of the first liquid outlet pipe 17 on one 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 added to the corresponding cuvette 28 (each sample tube 14 and control tube 15 corresponds to a cuvette 28);

[0071] S8: The colorimetric cell 28 is shielded and sealed by the pressing mechanism 5, and then the detection is performed through the detector body 27;

[0072] A door that can be opened and closed is provided on one side of the box body 7. While the detector body 27 is detecting the test liquid and the control liquid, the staff can open the door and then clean the cutting cylinder 101, transfer box 103, extraction tube 10, sample tube 14, control tube 15 and other parts that come into contact with the solution for next use.

[0073] The above is a preferred embodiment of the present invention. The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the scope of protection of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rapid detection device for pesticide residues in food, characterized by: The invention comprises a detector body (27) and a box body (7), characterized in that: a placement groove (6) is provided on the inner side of the detector body (27), one end of the detector body (27) is fixedly connected to the box body (7), one end of the detector body (27) is fixedly connected to a feeding mechanism (3), a cuvette (28) is placed on the inner side of the feeding mechanism (3), a pressing mechanism (5) is provided above the placement groove (6), a first support plate (8) and a second support plate (9) are fixedly connected to the inner side of the box body (7), a weighing sensor (11) is fixedly connected to the inner side of the second support plate (9), and a plurality of support plates (28) are provided around the weighing sensor (11) that are connected to the second support plate (9). ) is fixedly connected to a baffle (12), an extraction tube (10) is placed on the weighing sensor (11), a sample tube (14) and a control tube (15) are spirally connected to the inner side of the first support plate (8), the top ends of the extraction tube (10), the sample tube (14) and the control tube (15) are fixedly connected to a sealing stirring mechanism (2), the inner side of the top end of the box body (7) is spirally connected to a feeding mechanism (1), one end of the sealing stirring mechanism (2) fixedly connected to the sample tube (14) and the control tube (15) is fixedly connected to a power mechanism (4), and one end of the extraction tube (10), the sample tube (14) and the control tube (15) are connected to a negative pressure pump (13).

2. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: 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 end 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). ) on one side is connected to the second liquid outlet pipe (25), and one end of the first liquid outlet pipe (17) on the side of the fourth storage cylinder (23) is also connected to the third liquid outlet pipe (26). The outsides of the first liquid outlet pipe (17), the second liquid outlet pipe (25) and the third liquid outlet pipe (26) are all connected to a flow meter (18) and a solenoid valve (19). The insides of the top ends of the first storage cylinder (20), the second storage cylinder (21), the third storage cylinder (22) and the fourth storage cylinder (23) are connected to a one-way valve (24).

3. The rapid detection device for pesticide residues in food according to claim 1, characterized in that: The unloading mechanism (1) comprises a cutting cylinder (101) spirally connected to the box body (7), a cutting knife (102) is provided on the inner side of the cutting cylinder (101), the outer side of the bottom end of the cutting cylinder (101) is connected to a transfer box (103), the inner side of the bottom end of the transfer box (103) is provided with an unloading port (106), the inner side of the bottom end of the transfer box (103) is slidably connected to a slide rail (108), the bottom end of the slide rail (108) is fixedly connected to a blocking plate (107), the bottom end of the blocking plate (107) is fixedly connected to a first rack (109), one end of the transfer box (103) is fixedly connected to a first motor (104), and 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: 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), and 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, characterized in that: The sealing stirring mechanism (2) comprises a sealing frame (201) fixedly connected to the top ends 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 side of the top end of the sealing shell (203); a roller (205) is rotatably connected to the inner side of the sealing shell (203), and the roller (205) is in contact with the sealing ring (202); and 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 body (27), the top of the support frame (301) is fixedly connected to a placement frame (314), the inner side of the support frame (301) is fixedly connected to a third motor (303), the main shaft end of the third motor (303) is fixedly connected to a first screw (304), the outer side of the first screw (304) is spirally connected to a push block (305), the push block (305) passes through the bottom end surface of the placement frame (314) and is slidably connected to the placement frame (314), Both ends of the placement rack (314) are slidably connected to 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 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 guide column (306) slidably connected to the moving rod (310), and the other end of the guide column (306) is fixedly connected to a clamping block (313).

7. A 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), a main shaft end of the fourth motor (307) is fixedly connected to a second screw rod (308) spirally connected to one of the moving rods (310), and 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) comprises 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), and a second gear (402) is fixedly connected to the end of the main shaft of the fifth motor (401).

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

10. The method for using the rapid detection device for pesticide residues in food according to claim 2, characterized in that: S1: The sample is placed inside the unloading mechanism (1) and chopped, and then transported to the inside of the extraction tube (10) for weighing. At the same time, the cuvette (28) is placed inside the placement tank (6) through the cooperation of the loading 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 to mix. At the same time, add the buffer solution inside the fourth storage cylinder (23) to the control tube (15); S3: After mixing, the inside of the extraction tube (10) is placed in a negative pressure state by a negative pressure pump (13), so that bubbles inside the extraction tube (10) can escape quickly, thereby reducing the standing time; S4: Add the test solution inside the extraction tube (10) into the sample tube (14); S5: Adding cholinesterase from the third storage cylinder (22) and the color developer from the second storage cylinder (21) to the inner sides of the control tube (15) and the sample tube (14) at the same time, and then stirring, and then using the negative pressure pump (13) to put the inner sides 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) escape quickly, thereby reducing the standing time; S6: adding the substrate reagent in the first storage cylinder (20) to the control tube (15) and the sample tube (14); S7: Then add the test solution in the control tube (15) and the sample tube (14) into the corresponding cuvette (28); S8: The colorimetric dish (28) is shielded and sealed by the pressing mechanism (5), and then the detection is performed through the detector body (27).

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