Crop pesticide residue detection device

Abstract

The utility model relates to a crop pesticide residue detection device, which belongs to the technical field of pesticide residue detection, and comprises a base, a sampling mechanism is arranged on the base, a detection mechanism is arranged on the right side of the sampling mechanism, a shell covers the sampling mechanism and the detection mechanism, and the shell is connected with the base. And a recorder is arranged on the shell. The electric telescopic rod extends to drive the push plate connected with the output end of the electric telescopic rod to move downwards, so that the rotating shaft moves downwards, the second rotating shaft which is in sliding fit with the supporting frame through the cross rod moves downwards, and the blade at the lower end of the rotating shaft extends into the sample groove; meanwhile, a second gear at the lower end of a rotating shaft is meshed and matched with a first gear connected with the output end of a motor, a sample is smashed and cut, smashing work is stopped in the same way after cutting is completed, centrifugal work continues, a smashed mixed solution is subjected to centrifugal separation, juice contained in crops is extracted completely, and errors of detection experiment results are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pesticide residue detection, and particularly relates to a device for detecting pesticide residues in crops. Background Art

[0002] Pesticide residues refer to the general term for pesticide precursors, derivatives, metabolites, degradation products and impurities that remain in the environment, organisms and food after the use of pesticides. The main causes of excessive pesticide residues in vegetables are organophosphorus pesticides and carbamate pesticides that are banned in vegetable production by some countries, such as methyl parathion, oxydemeton-methyl, phorate, parathion, methyl parathion, etc. Eating food containing a large amount of highly toxic and extremely toxic pesticide residues can lead to acute poisoning accidents in humans and animals. Long-term consumption of agricultural and sideline products with excessive pesticide residues will not lead to acute poisoning, but may cause chronic poisoning in humans and animals, lead to the occurrence of diseases, induce cancer, and even affect the next generation.

[0003] Existing pesticide residue testing generally involves first crushing the crops to collect samples through sedimentation, and then adding the resulting sample solution to a testing instrument for pesticide residue detection. However, manual crushing and sedimentation is time-consuming and inefficient, and it is unable to fully extract the juice contained in the crops, resulting in large errors in the test results. Utility Model Content

[0004] The purpose of the present invention is to provide a device for detecting pesticide residues in crops with a simple structure and reasonable design in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A device for detecting pesticide residues in crops comprises a base, a sampling mechanism is provided on the base, the sampling mechanism comprises a sample rack, the sample rack is connected to the base, a sample trough is provided on the sample rack, a centrifugal mechanism is provided on the lower side of the sample trough, a moving mechanism is provided on the right side of the sample rack, a crushing mechanism is provided on the sample trough, a detection mechanism is provided on the right side of the sampling mechanism, the sampling mechanism and the detection mechanism are covered by an outer shell, the outer shell is connected to the base, and a recorder is installed on the outer shell.

[0007] As a further optimization scheme of the present utility model, the detection mechanism includes a liquid reservoir connected to the base, a high-pressure pump is installed on the liquid reservoir, a liquid inlet pipe is connected to the high-pressure pump, an injector is installed on the liquid inlet pipe, the injector corresponds to the position of the sample slot, the other end of the liquid inlet pipe is connected to a chromatographic column, a detector is installed on the chromatographic column, and the detector is connected to a recorder.

[0008] As a further optimization solution of the present invention, the centrifugal mechanism includes a motor connected to the base, the output end of the motor is connected to a card block, the lower end of the sample slot is provided with a card slot, and the card block and the card slot correspond to each other in position.

[0009] As a further optimization scheme of the present utility model, the moving mechanism includes a support frame, the support frame is connected to the base, the support frame is connected to an electric telescopic rod, the output end of the electric telescopic rod is connected to a push plate, the push plate is rotatably connected to a first rotating shaft, the lower side of the first rotating shaft is connected to a second gear, the output end of the motor is connected to a first gear, the second gear is engaged with the first gear, and the other end of the first rotating shaft is connected to a first pulley.

[0010] As a further optimization scheme of the present utility model, the crushing mechanism includes a cross bar, which slides with the support frame, and the cross bar is rotatably connected to a second rotating shaft, and the second rotating shaft is connected to a second pulley, and belts are tensioned on the first pulley and the second pulley, and a blade is connected to the lower side of the second rotating shaft.

[0011] As a further optimization solution of the present invention, a thermal printer is installed on the housing, and the thermal printer is connected to the recorder.

[0012] As a further optimization solution of the present invention, a sample placement opening is provided on the housing, and the sample placement opening corresponds to the position of the sample slot.

[0013] The beneficial effects of the present invention are:

[0014] 1. The utility model drives the push plate connected to the output end of the electric telescopic rod to move downward by extending the electric telescopic rod, thereby moving the rotating shaft downward, and moving the second rotating shaft that slides with the support frame through the cross bar downward, so that the blade at the lower end of the rotating shaft is extended into the sample groove, and at the same time, the second gear at the lower end of the rotating shaft is engaged with the first gear connected to the output end of the motor. As the motor drives the sample groove to rotate, the rotating shaft rotates in the support frame, and the belt drive is used to drive the second rotating shaft to drive the blade to rotate in the sample groove to crush and cut the sample. After the cutting is completed, the crushing work is stopped and the centrifugal work is continued. The crushed mixed solution is centrifuged to quickly obtain a mixed sample solution, and the juice contained in the crops is completely extracted, thereby reducing the error of the detection experimental results.

[0015] 2. In the present invention, the sample solution reacts with the mobile phase and flows into the chromatographic column. After flowing through the detector, the sample concentration is converted into an electrical signal and transmitted to the recorder. The data obtained after recording and processing by the recorder is printed out by a thermal printer for easy recording and observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a schematic diagram of the overall front three-dimensional structure of the utility model;

[0017] Figure 2 It is a three-dimensional structural diagram of the internal structure of the utility model;

[0018] Figure 3 Is a schematic diagram of the three-dimensional structure of the utility model sampling mechanism a;

[0019] Figure 4 Schematic diagram b of the three-dimensional structure of the sampling mechanism of the present invention;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the detection mechanism of the utility model.

[0021] In the figure: 1. base; 2. sampling mechanism; 21. sample rack; 22. sample slot; 23. motor; 24. block; 25. slot; 26. first gear; 27. support frame; 28. electric telescopic rod; 29. push plate; 210. first rotating shaft; 211. second gear; 212. first pulley; 213. cross bar; 214. second rotating shaft; 215. second pulley; 216. belt; 217. blade; 3. detection mechanism; 31. liquid reservoir; 32. high-pressure pump; 33. liquid inlet pipe; 34. sample injector; 35. chromatographic column; 36. detector; 4. housing; 5. recorder; 6. thermal printer; 7. sample opening. DETAILED DESCRIPTION

[0022] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content. Example

[0023] like Figure 1 、 Figure 2 and Figure 5 As shown, a device for detecting pesticide residues in crops includes a base 1, a sampling mechanism 2 is provided on the base 1, and the sampling mechanism 2 includes a sample rack 21, the sample rack 21 is connected to the base 1, a sample slot 22 is provided on the sample rack 21, a centrifugal mechanism is provided on the lower side of the sample slot 22, a moving mechanism is provided on the right side of the sample rack 21, a crushing mechanism is provided on the sample slot 22, a detection mechanism 3 is provided on the right side of the sampling mechanism 2, and the sampling mechanism 2 and the detection mechanism 3 are covered by a shell 4, the shell 4 is connected to the base 1, and a recorder 5 is installed on the shell 4.

[0024] like Figure 3 、 Figure 4 and Figure 5As shown, the detection mechanism 3 includes a liquid reservoir 31 with a base 1, a high-pressure pump 32 is installed on the liquid reservoir 31, a liquid inlet pipe 33 is connected to the high-pressure pump 32, and a sample injector 34 is installed on the liquid inlet pipe 33. In order to prevent debris in the sample tank 22 from entering the sampler 34, a filter is installed at the liquid inlet of the sampler 34. The sample injector 34 corresponds to the position of the sample tank 22. The other end of the liquid inlet pipe 33 is connected to a chromatographic column 35, and a detector 36 is installed on the chromatographic column 35. The detector 36 is electrically connected to the recorder 5, and the other end of the chromatographic column 35 is connected to a liquid collecting tank through a pipeline. The centrifugal mechanism includes a motor 23 with a base 1, and the output end of the motor 23 is connected to a card block 24. The lower end of the sample tank 22 is provided with a card slot 25. The card block 24 is connected to the output end of the motor 23. The block 24 corresponds to the position of the card slot 25 and cooperates with each other, which is convenient for taking out, cleaning or installing the sample slot 22. The moving mechanism includes a support frame 27, which is connected to the base 1, and an electric telescopic rod 28 is connected to the support frame 27. The output end of the electric telescopic rod 28 is connected to a push plate 29, and the push plate 29 is rotatably connected to the first rotating shaft 210. The lower side of the first rotating shaft 210 is connected to the second gear 211, the output end of the motor 23 is connected to the first gear 26, the second gear 211 is meshed with the first gear 26, and the other end of the first rotating shaft 210 is connected to the first pulley 212. The crushing mechanism includes a cross bar 213, which slides with the support frame 27, and the cross bar 213 is rotatably connected to the second The second rotating shaft 214 is connected to the second rotating shaft 214 with a second pulley 215, and the first pulley 212 and the second pulley 215 are stretched with a belt 216. The lower side of the second rotating shaft 214 is connected to the blade 217. The electric telescopic rod 28 extends to drive the push plate 29 connected to its output end to move downward, thereby moving the first rotating shaft 210 downward, and the second rotating shaft 214 slidingly matched with the support frame 27 through the cross bar 213 moves downward, and the blade 217 at the lower end of the second rotating shaft 214 is extended into the sample groove 22. At the same time, the second gear 211 at the lower end of the first rotating shaft 210 is engaged with the first gear 26 connected to the output end of the motor 23. As the motor 23 works, the sample groove 210 is driven. 2 rotates, the first rotating shaft 210 rotates in the support frame 27, and the second rotating shaft 214 is driven by a belt drive to drive the blade 217 to rotate in the sample slot 22 to crush and cut the sample. After cutting is completed, the crushing work is stopped and the centrifugal work is continued. The crushed mixed solution is centrifuged to quickly obtain a mixed sample solution, and the juice contained in the crops is completely extracted, thereby reducing the error of the test results. A thermal printer 6 is installed on the housing 4, and the thermal printer 6 is connected to the recorder 5. The data obtained after recording and processing on the recorder 5 is printed out by the thermal printer 6 for easy recording and observation. A sample placement port 7 is provided on the housing 4, and the sample placement port 7 corresponds to the position of the sample slot 22, which is convenient for taking and placing samples.

[0025] When in use, the sample to be tested is placed in the sample tank 22 from the sample opening 7, and a blank solution is poured in. The electric telescopic rod 28 extends and drives the push plate 29 connected to its output end to move downward, thereby moving the first rotating shaft 210 downward, and the second rotating shaft 214 slidingly matched with the support frame 27 through the cross bar 213 moves downward, and the blade 217 at the lower end of the second rotating shaft 214 is extended into the sample tank 22. At the same time, the second gear 211 at the lower end of the first rotating shaft 210 is meshed with the first gear 26 connected to the output end of the motor 23. As the motor 23 works to drive the sample tank 22 to rotate, the first rotating shaft 210 rotates in the support frame 27, and the second rotating shaft 214 drives the blade 217 to rotate in the sample tank 22 by belt transmission to crush and cut the sample. After completion, the crushing work is stopped and the centrifugation work is continued. The mixed solution in the sample tank 22 is centrifuged, and the injector 34 extracts the supernatant liquid after centrifugation in the sample tank 22. The mobile phase in the liquid reservoir 31 is pumped into the system by the high-pressure pump 32. The sample solution enters the mobile phase through the injector 34 and is carried into the chromatographic column 35 by the mobile phase along the liquid inlet pipe 33. Since the components in the sample solution have different distribution coefficients in the two phases, when they move relative to each other in the two phases, after repeated adsorption-desorption distribution processes, the components have a large difference in movement speed, are separated into single components and flow out of the column in turn. When passing through the detector 36, the sample concentration is converted into an electrical signal and transmitted to the recorder 5, and the data is printed out in the form of a graph by the thermal printer 6.

[0026] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A device for detecting pesticide residues in crops, comprising a base (1), characterized in that: The base (1) is provided with a sampling mechanism (2), the sampling mechanism (2) includes a sample rack (21), the sample rack (21) is connected to the base (1), the sample rack (21) is provided with a sample slot (22), the lower side of the sample slot (22) is provided with a centrifugal mechanism, the right side of the sample rack (21) is provided with a moving mechanism, the sample slot (22) is provided with a crushing mechanism, the right side of the sampling mechanism (2) is provided with a detection mechanism (3), the sampling mechanism (2) and the detection mechanism (3) are covered by a shell (4), the shell (4) is connected to the base (1), and a recorder (5) is installed on the shell (4).

2. The device for detecting pesticide residues in crops according to claim 1, wherein: The detection mechanism (3) includes a liquid reservoir (31) connected to the base (1), a high-pressure pump (32) is installed on the liquid reservoir (31), a liquid inlet pipe (33) is connected to the high-pressure pump (32), an injector (34) is installed on the liquid inlet pipe (33), the injector (34) corresponds to the position of the sample slot (22), the other end of the liquid inlet pipe (33) is connected to a chromatographic column (35), a detector (36) is installed on the chromatographic column (35), and the detector (36) is electrically connected to the recorder (5).

3. The device for detecting pesticide residues in crops according to claim 1, wherein: The centrifugal mechanism comprises a motor (23) connected to the base (1); an output end of the motor (23) is connected to a clamping block (24); a clamping slot (25) is provided at the lower end of the sample tank (22); and the clamping block (24) and the clamping slot (25) are positioned correspondingly and cooperate with each other.

4. The device for detecting pesticide residues in crops according to claim 3, wherein: The moving mechanism includes a support frame (27), the support frame (27) is connected to the base (1), the support frame (27) is connected to an electric telescopic rod (28), the output end of the electric telescopic rod (28) is connected to a push plate (29), the push plate (29) is rotatably connected to a first rotating shaft (210), the lower side of the first rotating shaft (210) is connected to a second gear (211), the output end of the motor (23) is connected to a first gear (26), the second gear (211) is meshed with the first gear (26), and the other end of the first rotating shaft (210) is connected to a first pulley (212).

5. The device for detecting pesticide residues in crops according to claim 4, characterized in that: The crushing mechanism includes a crossbar (213), the crossbar (213) slides with the support frame (27), a second rotating shaft (214) is rotatably connected to the crossbar (213), a second pulley (215) is connected to the second rotating shaft (214), a belt (216) is tensioned on the first pulley (212) and the second pulley (215), and a blade (217) is connected to the lower side of the second rotating shaft (214).

6. The device for detecting pesticide residues in crops according to claim 1, wherein: A thermal printer (6) is installed on the housing (4), and the thermal printer (6) is connected to the recorder (5).

7. The device for detecting pesticide residues in crops according to claim 1, wherein: The housing (4) is provided with a sample opening (7), and the position of the sample opening (7) corresponds to the position of the sample slot (22).

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