Multi-point rapid sampling device and method for pesticide residue detection of agricultural products
By designing a multi-point fast sampling device, using the adjustment components of sampling spacing, angle and position, combined with the spiral sampling rod of spiral grooves, the problems of uneven sampling and cumbersome equipment operation in the detection of pesticide residues of vegetables and agricultural products are solved, efficient and accurate multi-point sampling is achieved, and higher quality samples are provided.
Patent Information
- Application Number
- CN202510288736.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-04-25
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art is difficult to achieve evenly distributed multi-point sampling in the detection of pesticide residues for vegetable and agricultural products, resulting in the inability to fully and accurately reflect the pesticide residue status of the whole batch of vegetables. The sampling equipment is cumbersome to operate when adapting to vegetable piles of different heights and angles, and is inefficient.
A multi-point rapid sampling device for pesticide residue detection for agricultural products is designed. By cooperating with the sampling spacing adjustment components, angle adjustment components and position adjustment components, flexible adjustment of sampling points spacing, angle and position are achieved. The device uses a spiral sampling rod with spiral grooves, which can quickly cut into vegetables, prevent the sample from scattering or extruding, and maintain the original shape and integrity of the sample.
It realizes flexible adaptation to vegetable piles of different shapes, ensures consistent spacing between sampling points, improves the accuracy and efficiency of detection, provides higher quality samples, and lays a solid foundation for subsequent pesticide residue detection.
Smart Images
Figure CN119880509A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of multi-point sampling of vegetables, and in particular to a multi-point rapid sampling device and method for detecting pesticide residues in agricultural products. Background Art
[0002] In the field of agricultural product quality and safety testing, pesticide residue testing is a key link in ensuring food safety. Vegetables are agricultural products that are consumed in large quantities on a daily basis and are easily contaminated by pesticides, so the accuracy of their pesticide residue testing is crucial. Currently, the traditional method of sampling vegetables that are piled together has many disadvantages.
[0003] The existing sampling methods are generally manual sampling and mechanical sampling. Manual sampling is manual sampling using sampling tools, and mechanical sampling is generally able to cut, squeeze, or crush individual vegetables for sampling. However, manual sampling relies on the experience and operating techniques of the testers. When different personnel operate, it is difficult to ensure that the spacing between each sampling is consistent. When faced with a large number of vegetables, it is difficult to achieve evenly distributed multi-point sampling, resulting in the samples not being able to fully and accurately reflect the pesticide residue status of the entire batch of vegetables. In addition, when manually inserting the sampling tool, it is difficult to control the insertion depth and strength, which can easily cause the sample to be unevenly squeezed, affecting the accuracy of the test results.
[0004] Although mechanical sampling equipment can partially reduce the labor burden, it lacks flexibility in adjusting the spacing between sampling points. Most equipment can only sample at fixed intervals, which cannot meet the diverse sampling spacing requirements of different testing standards and vegetable stacking conditions. At the same time, when adapting to vegetable piles of different heights, such equipment usually requires manual assistance to adjust the height, which is cumbersome and inefficient.
[0005] In order to sample different sampling points simultaneously, flexibly adapt to different vegetable stacking heights and angles, and realize multi-point rapid sampling, a multi-point rapid sampling device for pesticide residue detection in agricultural products was designed. Summary of the invention
[0006] The present invention provides a multi-point rapid sampling device and method for detecting pesticide residues in agricultural products. The present invention can accurately adjust the spacing of sampling points through a sampling spacing adjustment component to adapt to different detection requirements. The angle adjustment component and the position adjustment component cooperate with each other, so that the sampling device can flexibly change the sampling angle and position, thereby improving the adaptability to vegetable piles of different shapes. When a spiral groove is provided and a spiral sampling rod is inserted into the vegetable pile, the structure of the groove can prevent the sample from being scattered or excessively squeezed and deformed during the extraction process, thereby better maintaining the original shape and integrity of the sample, providing a higher quality sample for subsequent accurate pesticide residue detection, and the spiral groove increases the contact area and accommodation space between the sampling rod and the vegetable, so that more vegetable samples can be collected during one sampling process.
[0007] A multi-point rapid sampling device for detecting pesticide residues in agricultural products, comprising a bottom plate, characterized in that a limiter is mounted on the bottom plate and is used to limit the position of a sampling spacing adjustment component, wherein the sampling spacing adjustment component can adjust the spacing of sampling points and the initial height during sampling; The sampling interval adjustment assembly comprises a spiral sampling rod and a second electric push rod, and the upper end of the spiral sampling rod is fixedly connected to the telescopic rod of the second electric push rod.
[0008] As a further limitation of the present technical solution, the sampling interval adjustment component also includes a linear rail, a first electric push rod, a first connecting rod, a second connecting rod, a moving block and a guide shaft. The linear rail is fixedly connected to the angle adjustment component, and a group of evenly arranged moving blocks are arranged in the slide groove of the linear rail. One side of each moving block is fixedly connected to the shell of the second electric push rod, and the moving block can slide in the slide groove of the linear rail. The slide groove of the linear rail is fixedly connected to the guide shaft, and the guide shaft passes through the moving block. A slider close to the angle adjustment component is fixed at one end in the slide groove of the linear rail and is hinged to the first connecting rod, and a slider at the other end is hinged to the second connecting rod, and the remaining sliders are coaxially hinged to the first connecting rod and the second connecting rod respectively. The adjacent first connecting rod and the second connecting rod are hinged to each other in a V-shaped state, and the slider adjacent to the fixed slider is fixedly connected to the telescopic rod end of the first electric push rod, and the shell of the first electric push rod is fixedly connected to the angle adjustment component.
[0009] As a further limitation of the present technical solution, the angle adjustment component is a second motor and a second motor cavity, the second motor cavity is fixedly connected to the housing of the first electric push rod, the second motor is fixedly connected to the second motor cavity, the second motor cavity is rotatably connected to one end of the linear track, and the output shaft of the second motor is fixedly connected to the linear track.
[0010] As a further limitation of the present technical solution, the limiting member includes an arcuate slide rail and a limiting rod, both ends of the arcuate slide rail are fixed on the base plate, the limiting rod is slidably arranged in the arcuate slide rail, and one end of the limiting rod is fixedly connected to the second motor cavity.
[0011] As a further limitation of the present technical solution, it also includes a position adjustment component, which is arranged on the base plate, and the position adjustment component is connected to the limit member, and the position adjustment component includes a guide rod, a slider, a limit slide groove, a straight groove rod, a screw rod and a first stepper motor, the two ends of the straight groove rod are respectively fixed to the base plate through support columns, a slider is arranged in the slide groove of the straight groove rod, the slider can slide in the slide groove of the straight groove rod, the slider is threadedly connected to the screw rod, the two ends of the screw rod are rotatably connected to the two ends of the straight groove rod, one end of the screw rod is fixed to the first stepper motor, the output shaft of the first stepper motor is fixedly connected to one end of the screw rod, one side of the slider is fixedly connected to the limit slide groove, the guide rod is slidably fitted in the limit slide groove, and one side of the lower end of the guide rod is fixedly connected to the other end of the limit rod.
[0012] As a further limitation of the technical solution, the spiral sampling rod is cylindrical and a spiral groove is provided on the arc-shaped wall surface.
[0013] A method for using a multi-point rapid sampling device for detecting pesticide residues in agricultural products comprises the following steps: Step 1: Place the device in a suitable location next to the vegetable pile, connect the power supply, and start the device; Step 2: According to the position and shape of the vegetable pile, start the first stepper motor, drive the screw rod to rotate, and move the slider in the straight groove rod slide, and then adjust the position of the limit rod in the arc slide rail, determine the horizontal position of the entire sampling device, and ensure that the spiral sampling rod is above the sampled vegetables; Step 3: According to the height and tilt angle of the vegetable pile, start the second motor, drive the linear track to rotate through its output shaft, and adjust the angle of the spiral sampling rod so that it can be vertically aligned with the sampling position of the vegetable pile; Step 4: According to the detection requirements, start the first electric push rod, adjust the spacing between each moving block, and determine the spacing between sampling points; Step 5: Start the second electric push rod and fine-tune the initial height of the spiral sampling rod. After the above parameters are adjusted, start the second electric push rod again to insert the spiral sampling rod downward into the vegetable pile for sampling. After the sampling is completed, the second electric push rod drives the spiral sampling rod to rise and take out the obtained samples for subsequent pesticide residue detection and analysis.
[0014] Compared with the prior art, the advantages and positive effects of the present invention are: The sampling spacing adjustment component can accurately adjust the spacing of the sampling points to meet different detection requirements. When the telescopic rod of the first electric push rod is extended or retracted, the slider connected thereto is driven to move. Due to the hinged relationship between the connecting rods, other sliders are moved synchronously in the linear track, thereby adjusting the spacing between the moving blocks, thereby realizing the adjustment of the spacing of the sampling points of the spiral sampling rod. The upper end of the spiral sampling rod is fixedly connected to the telescopic rod of the second electric push rod. When the second electric push rod is working, the telescopic rod is extended or retracted, driving the spiral sampling rod to move up and down, thereby realizing the adjustment of the initial height during sampling. Adjusting the initial height during sampling can ensure that effective sampling can be performed on vegetable piles with different stacking heights. The angle adjustment component and the position adjustment component cooperate with each other, so that the sampling device can flexibly change the sampling angle and position, thereby improving the adaptability to vegetable piles of different shapes; When the spiral sampling rod is inserted into the vegetable pile, the spiral groove can use the propulsion force of the spiral structure to cut into the vegetables more quickly, just like an auger. When the spiral sampling rod rotates and inserts into the vegetable pile, the vegetable sample will be rolled into the groove. The structure of the groove can prevent the sample from scattering or being excessively squeezed and deformed during the extraction process, thereby better maintaining the original shape and integrity of the sample, providing higher quality samples for subsequent accurate pesticide residue detection. The spiral groove increases the contact area and accommodation space between the sampling rod and the vegetable. In a sampling process, more vegetable samples can be collected, realizing the multi-point rapid sampling function and reducing manual operation time. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 The three-dimensional Figure 1 ; Figure 2 The three-dimensional Figure 2 ; Figure 3 For the present invention Figure 2 A partial enlarged view of the middle A; Figure 4 The three-dimensional Figure 3 ; Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle.
[0016] In the figure: 1. position adjustment component; 101. guide rod; 102. slider; 103. limit slide; 104. straight groove rod; 105. screw; 106. first stepper motor; 2. support column; 3. second motor; 4. limit member; 401. arc slide rail; 402. limit rod; 5. sampling interval adjustment component; 501. linear rail; 502. first electric push rod; 503. first connecting rod; 504. second connecting rod; 505. moving block; 506. guide shaft; 507. second electric push rod; 508. spiral sampling rod; 6. bottom plate. DETAILED DESCRIPTION
[0017] The following is combined with Figure 1-Figure 5 The present invention is further described with reference to the accompanying drawings and embodiments.
[0018] The specific embodiments of the present invention are: A multi-point rapid sampling device for detecting pesticide residues in agricultural products, comprising a bottom plate 6, characterized in that a limiter 4 is mounted on the bottom plate 6 and is used to limit a sampling spacing adjustment component 5, wherein the sampling spacing adjustment component 5 can adjust the spacing of sampling points and the initial height during sampling; The sampling interval adjustment assembly 5 comprises a spiral sampling rod 508 and a second electric push rod 507 , and the upper end of the spiral sampling rod 508 is fixedly connected to the telescopic rod of the second electric push rod 507 .
[0019] The sampling interval adjustment component 5 also includes a linear track 501, a first electric push rod 502, a first connecting rod 503, a second connecting rod 504, a moving block 505 and a guide shaft 506. The linear track 501 is fixedly connected to the angle adjustment component. A group of evenly arranged moving blocks 505 are arranged in the slide groove of the linear track 501. One side of each moving block 505 is fixedly connected to the shell of the second electric push rod 507. The moving block 505 can slide in the slide groove of the linear track 501. The guide shaft 506 is fixedly connected in the slide groove of the linear track 501. The guide shaft 506 passes through the moving block 50 5. One of the sliders 102 close to the angle adjustment component is fixed at one end of the slide groove of the linear track 501 and is hinged to the first connecting rod 503. One of the sliders 102 at the other end is hinged to the second connecting rod 504. The remaining sliders 102 are coaxially hinged to the first connecting rod 503 and the second connecting rod 504 respectively. The adjacent first connecting rods 503 and the second connecting rods 504 are hinged to each other to form a V-shaped state. The slider 102 adjacent to the fixed slider 102 is fixedly connected to the end of the telescopic rod of the first electric push rod 502, and the shell of the first electric push rod 502 is fixedly connected to the angle adjustment component.
[0020] In this embodiment, the linear track 501 is fixed on the angle adjustment component, and a group of evenly arranged moving blocks 505 are provided in its slide groove. The moving blocks 505 can slide in the slide groove. One side of each moving block 505 is fixedly connected to the housing of the second electric push rod 507, which is used to carry the spiral sampling rod 508 and realize its position movement. The guide shaft 506 fixed in the slide groove of the linear track 501 passes through the moving block 505, plays a guiding role, and ensures that the moving block 505 slides smoothly in the linear track 501. A slider 102 close to the angle adjustment component is fixed at one end of the slide groove of the linear track 501 and is hinged to the first connecting rod 503. The slider 102 at the other end is hinged to the second connecting rod 504. The remaining sliders are coaxially hinged to the first connecting rod 503 and the second connecting rod 504, respectively. The adjacent first connecting rods 503 and the second connecting rods 504 are hinged to each other to form a V shape. When the telescopic rod of the first electric push rod 502 is extended or retracted, the slider 102 connected thereto is driven to move. Due to the hinged relationship between the connecting rods, the other sliders 102 are caused to move synchronously in the linear track 501, thereby adjusting the spacing between the moving blocks 505, thereby adjusting the spacing between the sampling points of the spiral sampling rod 508. The upper end of the spiral sampling rod 508 is fixedly connected to the telescopic rod of the second electric push rod 507. When the second electric push rod 507 is working, the telescopic rod is extended or retracted, driving the spiral sampling rod 508 to move up and down, thereby adjusting the initial height during sampling.
[0021] The angle adjustment component is a second motor and a second motor cavity 3, the second motor cavity 3 is fixedly connected to the housing of the first electric push rod 502, the second motor is fixedly connected inside the second motor cavity 3, the second motor cavity 3 is rotatably connected to one end of the linear track 501, and the output shaft of the second motor is fixedly connected to the linear track 501.
[0022] In this embodiment, the second motor is fixed in the second motor cavity 3, the second motor cavity 3 is fixedly connected to the housing of the first electric push rod 502, the second motor cavity 3 is rotatably connected to one end of the linear track 501, and the output shaft of the second motor is fixedly connected to the linear track 501. When the second motor is working, its output shaft drives the linear track 501 to rotate, thereby adjusting the angle of the spiral sampling rod 508 to meet the sampling requirements at different angles.
[0023] The limiting member 4 includes an arc-shaped slide rail 401 and a limiting rod 402 . Both ends of the arc-shaped slide rail 401 are fixed on the bottom plate 6 . The limiting rod 402 is slidably arranged in the arc-shaped slide rail 401 . One end of the limiting rod 402 is fixedly connected to the second motor cavity 3 .
[0024] In this embodiment, both ends of the arc-shaped slide rail 401 are fixed on the bottom plate 6, the limiting rod 402 slides in the arc-shaped slide rail 401, and one end of the limiting rod 402 is fixedly connected to the second motor cavity 3 for limiting the movement of the angle adjustment component and the sampling component.
[0025] It also includes a position adjustment component 1, which is arranged on the base plate 6, and the position adjustment component 1 is connected to the limiter 4. The position adjustment component 1 includes a guide rod 101, a slider 102, a limit slide 103, a straight groove rod 104, a screw 105 and a first stepper motor 106. The two ends of the straight groove rod 104 are respectively fixed to the base plate 6 through support columns 2. The slide groove of the straight groove rod 104 is provided with a slider 102, and the slider 102 can slide in the slide groove of the straight groove rod 104. The slider 102 is threadedly connected to the screw rod 105, and the two ends of the screw rod 105 are rotatably connected to the two ends of the straight groove rod 104. One end of the screw rod 105 is fixed to the first stepper motor 106, and the output shaft of the first stepper motor 106 is fixedly connected to one end of the screw rod 105. One side of the slider 102 is fixedly connected to the limiting slide groove 103, and the guide rod 101 is slidably matched in the limiting slide groove 103. One side of the lower end of the guide rod 101 is fixedly connected to the other end of the limiting rod (402).
[0026] In this embodiment, both ends of the straight groove rod 104 are fixed to the bottom plate 6 through the support column 2, and the slider 102 in the slide groove can slide in the slide groove, and the slider 102 is threadedly connected to the screw rod 105, and one end of the screw rod 105 is fixedly connected to the first stepper motor 106. When the first stepper motor 106 is working, its output shaft drives the screw rod 105 to rotate, and due to the threaded cooperation between the slider 102 and the screw rod 105, the slider 102 will move in the slide groove of the straight groove rod 104, and the guide rod 101 is slidably matched in the limiting slide groove 103 fixedly connected to one side of the slider 102, and one side of the lower end of the guide rod 101 is fixedly connected to the other end of the limiting rod 402, so as to realize the position adjustment of the limiting rod 402 in the arc slide rail 401, and also adjust the position and height of the entire angle adjustment component and the sampling interval adjustment component 5.
[0027] The spiral sampling rod 508 is cylindrical and has a spiral groove on its arc-shaped wall.
[0028] In this embodiment, when the spiral sampling rod 508 is inserted into the vegetable pile, the spiral groove can use the propulsion force of the spiral structure to cut into the vegetables more quickly, just like an auger. Compared with a smooth sampling rod, the presence of the groove reduces the resistance during insertion, making the sampling process smoother. During the sampling process, the groove can play a certain role in wrapping and collecting the vegetable tissue. When the spiral sampling rod 508 rotates and inserts into the vegetable pile, the vegetable sample will be rolled into the groove. The structure of the groove can prevent the sample from being scattered or excessively squeezed and deformed during the extraction process, thereby better maintaining the original shape and integrity of the sample, providing a higher quality sample for subsequent accurate pesticide residue detection. The spiral groove increases the contact area and accommodation space between the sampling rod and the vegetable, and more vegetable samples can be collected during a sampling process.
[0029] The method of using the present invention is as follows: place the device at a suitable position next to the vegetable pile, turn on the power supply, start the device, and according to the position and shape of the vegetable pile, start the first stepper motor 106, which drives the screw 105 to rotate, so that the slider 102 moves in the slide groove of the straight groove rod 104, and then adjust the position of the limit rod 402 in the arc slide rail 401, determine the horizontal position of the entire sampling device, ensure that the spiral sampling rod 508 is above the sampled vegetables, and according to the height and inclination angle of the vegetable pile, start the second motor 3, drive the linear track 501 to rotate through its output shaft, and adjust the spiral The angle of the sampling rod 508 is such that it can be vertically aligned with the sampling position of the vegetable pile. According to the detection requirements, the first electric push rod 502 is started, the spacing between the moving blocks 505 is adjusted, and the spacing between the sampling points is determined; the second electric push rod 507 is started to fine-tune the initial height of the spiral sampling rod 508. After the above parameters are adjusted, the second electric push rod 507 is started again to insert the spiral sampling rod 508 downward into the vegetable pile for sampling. After the sampling is completed, the second electric push rod 507 drives the spiral sampling rod 508 to rise, and the obtained samples are taken out for subsequent pesticide residue detection and analysis.
[0030] Repeat sampling: If you need to sample at different locations, repeat steps 2-5 to complete multi-point sampling.
[0031] The present invention also provides a method for using a multi-point rapid sampling device for detecting pesticide residues in agricultural products, comprising the following steps: Step 1: Place the device in a suitable location next to the vegetable pile, connect the power supply, and start the device; Step 2: According to the position and shape of the vegetable pile, the first stepper motor 106 is started to drive the screw rod 105 to rotate, so that the slider 102 moves in the slide groove of the straight groove rod 104, and then the position of the limit rod 402 in the arc slide rail 401 is adjusted to determine the horizontal position of the entire sampling device, and ensure that the spiral sampling rod 508 is above the sampled vegetables; Step 3: According to the height and tilt angle of the vegetable pile, start the second motor, drive the linear track 501 to rotate through its output shaft, and adjust the angle of the spiral sampling rod 508 so that it can be vertically aligned with the sampling position of the vegetable pile; Step 4: According to the detection requirements, start the first electric push rod 502, adjust the spacing between the moving blocks 505, and determine the spacing between the sampling points; Step 5: Start the second electric push rod 507 and fine-tune the initial height of the spiral sampling rod 508. After the above parameters are adjusted, start the second electric push rod 507 again to insert the spiral sampling rod 508 downward into the vegetable pile for sampling. After the sampling is completed, the second electric push rod 507 drives the spiral sampling rod 508 to rise, and the obtained samples are taken out for subsequent pesticide residue detection and analysis.
[0032] The above descriptions are merely two embodiments of an absorber tube fixing frame of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A multi-point rapid sampling device for detecting pesticide residues in agricultural products, comprising a bottom plate (6), characterized in that: A limiting member (4) is mounted on the bottom plate (6) and is used to limit the position of the sampling spacing adjustment component (5), wherein the sampling spacing adjustment component (5) is capable of adjusting the spacing of the sampling points and the initial height during sampling; The sampling interval adjustment component (5) comprises a spiral sampling rod (508) and a second electric push rod (507), and the upper end of the spiral sampling rod (508) is fixedly connected to the telescopic rod of the second electric push rod (507).
2. The multi-point rapid sampling device for detecting pesticide residues in agricultural products according to claim 1 is characterized in that: The sampling interval adjustment component (5) further comprises a linear track (501), a first electric push rod (502), a first connecting rod (503), a second connecting rod (504), a moving block (505) and a guide shaft (506); the linear track (501) is fixedly connected to the angle adjustment component; a group of evenly arranged moving blocks (505) are arranged in a slide groove of the linear track (501); one side of each moving block (505) is fixedly connected to the housing of the second electric push rod (507); the moving block (505) can slide in the slide groove of the linear track (501); the guide shaft (506) is fixedly connected in the slide groove of the linear track (501); the guide shaft (506) passes through the moving block (505); A movable block (505), a slider (102) close to the angle adjustment component is fixed at one end in the slide groove of the linear track (501) and is hingedly connected to the first connecting rod (503), a slider (102) at the other end is hingedly connected to the second connecting rod (504), and the remaining sliders (102) are coaxially hingedly connected to the first connecting rod (503) and the second connecting rod (504), respectively, and the adjacent first connecting rods (503) and second connecting rods (504) are hingedly connected to each other to form a V-shaped state, and the slider (102) adjacent to the fixed slider (102) is fixedly connected to the telescopic rod end of the first electric push rod (502), and the shell of the first electric push rod (502) is fixedly connected to the angle adjustment component.
3. The multi-point rapid sampling device for detecting pesticide residues in agricultural products according to claim 2 is characterized in that: The angle adjustment component comprises a second motor and a second motor cavity (3); the second motor cavity (3) is fixedly connected to the housing of the first electric push rod (502); the second motor is fixedly connected inside the second motor cavity (3); the second motor cavity (3) is rotatably connected to one end of the linear track (501); and the output shaft of the second motor is fixedly connected to the linear track (501).
4. The multi-point rapid sampling device for detecting pesticide residues in agricultural products according to claim 3 is characterized in that: The limiting member (4) comprises an arc-shaped slide rail (401) and a limiting rod (402), the two ends of the arc-shaped slide rail (401) are fixed on the bottom plate (6), the limiting rod (402) is slidably arranged in the arc-shaped slide rail (401), and one end of the limiting rod (402) is fixedly connected to the second motor cavity (3).
5. The multi-point rapid sampling device for detecting pesticide residues in agricultural products according to claim 4 is characterized in that: The invention also comprises a position adjustment component (1), wherein the position adjustment component (1) is arranged on the base plate (6), the position adjustment component (1) is connected to the position limiting member (4), the position adjustment component (1) comprises a guide rod (101), a slider (102), a position limiting slide groove (103), a straight groove rod (104), a screw rod (105) and a first stepper motor (106), the two ends of the straight groove rod (104) are respectively fixed to the base plate (6) via support columns (2), a slider (102) is arranged in the slide groove of the straight groove rod (104), and the slider (102) can be moved in the sliding groove of the straight groove rod (104). The slider (102) is threadably connected to the screw rod (105), and the two ends of the screw rod (105) are rotatably connected to the two ends of the straight groove rod (104). One end of the screw rod (105) is fixed to the first stepper motor (106), and the output shaft of the first stepper motor (106) is fixedly connected to one end of the screw rod (105). One side of the slider (102) is fixedly connected to the limiting slide groove (103), and the guide rod (101) is slidably matched in the limiting slide groove (103), and one side of the lower end of the guide rod (101) is fixedly connected to the other end of the limiting rod (402).
6. The multi-point rapid sampling device for detecting pesticide residues in agricultural products according to claim 1 is characterized in that: The spiral sampling rod (508) is cylindrical and has a spiral groove arranged on its arc-shaped wall surface.
7. The method for using the multi-point rapid sampling device for detecting pesticide residues in agricultural products according to claim 5 is characterized by: The following steps are involved: Step 1: Place the device in a suitable location next to the vegetable pile, connect the power supply, and start the device; Step 2: According to the position and shape of the vegetable pile, the first stepper motor (106) is started to drive the screw rod (105) to rotate, so that the slider (102) moves in the slide groove of the straight groove rod (104), and then the position of the limit rod (402) in the arc slide rail (401) is adjusted to determine the horizontal position of the entire sampling device, and ensure that the spiral sampling rod (508) is above the sampled vegetables; Step 3: according to the height and tilt angle of the vegetable pile, start the second motor, drive the linear track (501) to rotate through its output shaft, and adjust the angle of the spiral sampling rod (508) so that it can be vertically aligned with the sampling position of the vegetable pile; Step 4: according to the detection requirements, start the first electric push rod (502), adjust the spacing between the moving blocks (505), and determine the spacing between the sampling points; Step 5: Start the second electric push rod (507) and fine-tune the initial height of the spiral sampling rod (508). After the above parameters are adjusted, start the second electric push rod (507) again to insert the spiral sampling rod (508) downward into the vegetable pile for sampling. After the sampling is completed, the second electric push rod (507) drives the spiral sampling rod (508) to rise, and the obtained sample is taken out for subsequent pesticide residue detection and analysis.