A pesticide residue detection sample oscillation extraction device with solid-liquid separation function

Abstract

This invention discloses a pesticide residue detection sample oscillation extraction device with solid-liquid separation function, relating to the field of detection equipment. When extracting pesticide residue samples using this device, the sample to be tested is placed in a combined testing cylinder, and a clamping and positioning component clamps the lower clamping plate. A motor drives a rotating plate, a placement cylinder, and the combined testing cylinder to rotate via a telescopic cylinder. Because the lower clamping plate is wavy and annular, the rotating plate vibrates up and down, and the combined testing cylinder vibrates along with the plate, ensuring that the substances in the sample are fully dissolved in the solvent within the combined testing cylinder. When solid-liquid separation is required, the clamping and positioning component is moved to another slot, clamping the upper clamping plate. Because the upper clamping plate is circular and annular, the rotating plate drives the combined testing cylinder to rotate at high speed, achieving solid-liquid separation through high-speed centrifugal force.

Description

Technical Field

[0001] This invention relates to detection equipment technology, specifically to a sample oscillation extraction device for pesticide residue detection with solid-liquid separation function. Background Technology

[0002] Pesticide residue testing is a crucial step in food safety supervision, aiming to accurately quantify pesticide residues in agricultural products and ensure they do not exceed the legal maximum residue limits. The testing process begins with the standardized collection and preparation of samples, requiring homogenization, extraction, and purification of samples such as vegetables and fruits to remove interfering matrices such as pigments and fats. Subsequently, high-sensitivity instruments are used for analysis, with gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) being the mainstream techniques. These techniques can simultaneously screen for hundreds of pesticides and achieve trace-level quantification.

[0003] The equipment currently configured in the sample pretreatment process for pesticide residue testing is generally limited to a single-function mode, that is, it can only independently complete one step of oscillation homogenization or centrifugation solid-liquid separation. Specifically, the tester must first place the matrix to be tested and the extraction reagent together in a centrifuge tube, rely on the oscillation homogenization device to achieve full extraction of the target analyte, and then transfer it to the centrifugation separation device to complete the solid-liquid two-phase separation and obtain the supernatant for subsequent detection. It can be seen that the existing equipment cannot simultaneously meet the dual functional requirements of oscillation homogenization and centrifugation separation on the same platform or in a single operation. This functional separation significantly reduces the pretreatment efficiency and increases the risk of sample transfer and contamination. Therefore, there is an urgent need to improve the structure of the existing extraction equipment to integrate homogenization and centrifugation capabilities. Summary of the Invention

[0004] The purpose of this invention is to provide a sample oscillation extraction device for pesticide residue detection with solid-liquid separation function, so as to solve the problem that existing technology equipment cannot simultaneously meet the dual functional requirements of oscillation homogenization and centrifugation separation on the same platform or in a single operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sample oscillation extraction device for pesticide residue detection with solid-liquid separation function, comprising a housing and a housing cover hinged to the housing, and further comprising:

[0006] A motor is connected in the housing, and a telescopic cylinder is connected to the output shaft of the motor. The telescopic cylinder extends and retracts axially.

[0007] A rotating plate is connected to the end of the telescopic cylinder. An upper clamping plate and a lower clamping plate are connected to the side of the rotating plate. The upper clamping plate is arranged in a circular ring shape, and the lower clamping plate is arranged in a wavy ring shape.

[0008] A clamping and positioning component is embedded in a housing. The housing has multiple sets of slots, each set containing two slots arranged side by side. The housing is connected to positioning frames located on both sides of the slots. The clamping and positioning component is embedded in the slots through the positioning frames and clamps the upper or lower clamping piece.

[0009] A placement cylinder is rotatably connected to the rotating plate, and a cylinder cover is attached to the placement cylinder. A combined inspection cylinder is placed inside the placement cylinder.

[0010] Preferably, the telescopic cylinder includes a sleeve fixedly connected to the output shaft of the motor and a slide rod slidably connected in the sleeve. The inner wall of the sleeve is provided with a slide groove, and a slider that is engaged in the slide groove is connected to the slide rod. A first spring is sleeved on the outside of the telescopic cylinder. One end of the first spring abuts against the rotating plate, and the other end abuts against the motor.

[0011] Preferably, the clamping and positioning assembly includes a mounting block and two insert rods connected to the side of the mounting block. The insert rods clamp the upper or lower clamping piece. Two opposing positioning blocks are slidably connected to the side of the mounting block away from the insert rods. Pull tabs are connected to the positioning blocks, and a second spring is connected between the two positioning blocks.

[0012] Preferably, the inner wall of the placement cylinder is connected to a plurality of positioning plates arranged in an M-shape, and the positioning plates deform and engage with the combined inspection cylinder.

[0013] Preferably, a small toothed ring is connected to the outer wall of the placement cylinder, and a large toothed ring is connected to the box body, with the small toothed ring meshing with the large toothed ring.

[0014] Preferably, the combined inspection cylinder includes a lower inspection cylinder, a connecting frame connected to the upper end of the lower inspection cylinder, and an upper inspection cylinder connected to the upper end of the connecting frame. A partition plate is connected to the middle of the connecting frame, and multiple crack grooves are printed on the partition plate. A sieve plate is connected to the lower end of the upper inspection cylinder.

[0015] Preferably, the lid is equipped with a display panel and a set of control buttons.

[0016] Preferably, the rotating plate has multiple sets of placement cylinders connected in a circumferential array.

[0017] Compared with existing technologies, the present invention provides a pesticide residue detection sample oscillation extraction device with solid-liquid separation function. By setting an upper and lower clamp on a rotating plate, during the oscillation extraction of pesticide residue samples, the sample to be tested is placed in the combined testing cylinder, and the lower clamp is clamped by a clamping and positioning component. The motor is started, and the motor drives the rotating plate, the placement cylinder, and the combined testing cylinder to rotate via a telescopic cylinder. Because the lower clamp is wavy and annular, the rotating plate vibrates up and down, and the combined testing cylinder vibrates along with the plate, ensuring that the substances in the sample are fully dissolved in the solvent within the combined testing cylinder. When solid-liquid separation is needed in the combined testing cylinder, the clamping and positioning component is moved to another slot, clamping the upper clamp. Because the upper clamp is circular and annular, the rotating plate drives the combined testing cylinder to rotate at high speed. High-speed centrifugal force achieves solid-liquid separation of the substances in the combined testing cylinder, and the upper liquid in the combined testing cylinder is extracted for detection. The device platform can simultaneously meet the dual functional requirements of oscillation homogenization and centrifugal separation, effectively improving pretreatment efficiency and avoiding sample transfer and contamination risks. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention. Figure 1 ;

[0020] Figure 2 A schematic diagram of the overall structure provided for an embodiment of the present invention. Figure 2 ;

[0021] Figure 3 A schematic diagram of the cross-sectional structure of the box provided in an embodiment of the present invention. Figure 1 ;

[0022] Figure 4 A schematic diagram of the cross-sectional structure of the box provided in an embodiment of the present invention. Figure 2 ;

[0023] Figure 5 Provided for embodiments of the present invention Figure 4 Enlarged view of part A in the middle;

[0024] Figure 6 Provided for embodiments of the present invention Figure 4 Enlarged view of part B in the middle;

[0025] Figure 7 Provided for embodiments of the present invention Figure 4 Enlarged view of the middle C section;

[0026] Figure 8 This is a schematic diagram of the exploded structure of the combined inspection cylinder provided in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Box body; 101. Box cover; 2. Motor; 3. Sleeve; 4. Slide groove; 5. Slide rod; 6. Slider; 7. First spring; 8. Rotating plate; 9. Upper clamping plate; 10. Lower clamping plate; 11. Slot; 12. Positioning frame; 13. Mounting block; 14. Insert rod; 15. Positioning block; 16. Pulling plate; 17. Second spring; 18. Placement cylinder; 19. Cylinder cover; 20. Positioning plate; 21. Small toothed ring; 22. Large toothed ring; 23. Combined inspection cylinder; 231. Lower inspection cylinder; 232. Connecting frame; 233. Isolation plate; 234. Upper inspection cylinder; 235. Sieve plate. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] As attached Figure 1 To be continued Figure 8 As shown:

[0031] Example 1:

[0032] This invention provides a sample oscillation extraction device for pesticide residue detection with solid-liquid separation function, including a housing 1 and a housing cover 101 hinged to the housing 1, and further comprising:

[0033] Motor 2 is connected in the housing 1. A telescopic cylinder is connected to the output shaft of motor 2. The telescopic cylinder extends and retracts axially, and the torque of motor 2 can be transmitted through the telescopic cylinder.

[0034] A rotating plate 8 is connected to the end of the telescopic cylinder. An upper clamping plate 9 and a lower clamping plate 10 are connected to the side of the rotating plate 8. The upper clamping plate 9 is arranged in a circular ring shape, and the lower clamping plate 10 is arranged in a wavy ring shape.

[0035] A clamping and positioning component is embedded in the housing 1. The housing 1 has multiple sets of slots 11, each set including two slots 11 arranged side by side. The housing 1 is connected to a positioning frame 12 located on both sides of the slot 11. The clamping and positioning component is embedded in the slot 11 through the positioning frame 12 and clamps the upper clamping piece 9 or the lower clamping piece 10.

[0036] A placement cylinder 18 is rotatably connected to the rotating plate 8, and a cylinder cover 19 is connected to the placement cylinder 18. A combined inspection cylinder 23 is placed in the placement cylinder 18, and multiple sets of placement cylinders 18 are connected in a circumferential array on the rotating plate 8.

[0037] As can be seen from the above, by setting an upper clamping plate 9 and a lower clamping plate 10 on the rotating plate 8, when the pesticide residue test sample is extracted by oscillation, after the sample to be tested is placed in the combined test tube 23, the lower clamping plate 10 is clamped by the clamping and positioning component. The motor 2 is started, and the motor 2 drives the rotating plate 8, the placement tube 18 and the combined test tube 23 to rotate through the telescopic tube. Since the lower clamping plate 10 is set in a wave-like ring, the rotating plate 8 will vibrate up and down. At this time, the combined test tube 23 vibrates up and down with the rotating plate 8, so that the substances in the sample are fully dissolved in the solution in the combined test tube 23. When it is necessary to separate the solid and liquid substances in the combined testing cylinder 23, the clamping and positioning component is moved to another slot 11, so that the clamping and positioning component clamps the upper clamping plate 9. Since the upper clamping plate 9 is set in a circular ring plate shape, the rotating plate 8 drives the combined testing cylinder 23 to rotate at high speed. The solid-liquid separation of the substances in the combined testing cylinder 23 is achieved through high-speed centrifugal force. The upper liquid in the combined testing cylinder 23 can be extracted for testing. The equipment platform can simultaneously meet the dual functional requirements of oscillation homogenization and centrifugal separation, effectively improving the pretreatment efficiency and avoiding the risk of sample transfer and contamination.

[0038] The telescopic cylinder includes a sleeve 3 fixedly connected to the output shaft of the motor 2 and a slide rod 5 slidably connected in the sleeve 3. The inner wall of the sleeve 3 is provided with a slide groove 4. A slider 6 is connected to the slide rod 5 and engaged in the slide groove 4. A first spring 7 is sleeved on the outside of the telescopic cylinder. One end of the first spring 7 abuts against the rotating plate 8 and the other end abuts against the motor 2.

[0039] As can be seen from the above, during the process of the motor 2 driving the telescopic cylinder to rotate, the output shaft of the motor 2 first drives the sleeve 3 to rotate, and the sleeve 3 drives the slide rod 5 to rotate through the slide groove 4 and the slider 6. At the same time, the slide rod 5 can also slide axially in the sleeve 3 through the slide groove 4 and the slider 6. In order to prevent the telescopic cylinder from extending and retracting arbitrarily, the first spring 7 is pre-compressed and supported on the telescopic cylinder to provide a limiting force for the telescopic cylinder and prevent the telescopic cylinder from jumping arbitrarily when there is no strong external force.

[0040] The clamping and positioning assembly includes a mounting block 13 and two insert rods 14 connected to the side of the mounting block 13. The insert rods 14 clamp the upper clamping piece 9 or the lower clamping piece 10. Two opposing positioning blocks 15 are slidably connected to the side of the mounting block 13 away from the insert rods 14. Pull tabs 16 are connected to the positioning blocks 15, and a second spring 17 is connected between the two positioning blocks 15.

[0041] Since the up-and-down movement of the rotating plate 8 depends on the clamping state of the clamping and positioning component with the upper clamping plate 9 or the lower clamping plate 10, when it is necessary for the rotating plate 8 to move up and down during rotation, thereby causing the placement cylinder 18 and the combined inspection cylinder 23 to vibrate up and down, the pull tab 16 can be used to drive the positioning block 15 to slide and compress the second spring 17. Then, the mounting block 13 of the clamping and positioning component is inserted into the lower slot 11, so that the two insert rods 14 are inserted into the lower clamping plate 10. Then, the pull tab 16 is released, and the compressed second spring 17 is reset and pushes the positioning block 15 outward. The positioning block 15 is inserted into the positioning frame 12, maintaining the stable insertion state of the insert rods 14. When it is necessary for the rotating plate 8 to rotate smoothly, it is only necessary to insert the clamping and positioning component into the upper slot 11, so that the insert rods 14 are inserted into the upper clamping plate 9.

[0042] The inner wall of the placement cylinder 18 is connected to a plurality of M-shaped positioning plates 20. The positioning plates 20 deform and engage with the combined inspection cylinder 23. When the combined inspection cylinder 23 is inserted into the placement cylinder 18, the positioning plates 20 deform and clamp the combined inspection cylinder 23. At this time, the positioning plates 20 apply an elastic clamping force to the combined inspection cylinder 23. This elastic clamping force makes the combined inspection cylinder 23 stably placed in the placement cylinder 18, preventing the combined inspection cylinder 23 from shaking in the placement cylinder 18.

[0043] Example 2:

[0044] This invention provides a sample oscillation extraction device for pesticide residue detection with solid-liquid separation function, including a housing 1 and a housing cover 101 hinged to the housing 1, and further comprising:

[0045] Motor 2 is connected in the housing 1. A telescopic cylinder is connected to the output shaft of motor 2. The telescopic cylinder extends and retracts axially, and the torque of motor 2 can be transmitted through the telescopic cylinder.

[0046] A rotating plate 8 is connected to the end of the telescopic cylinder. An upper clamping plate 9 and a lower clamping plate 10 are connected to the side of the rotating plate 8. The upper clamping plate 9 is arranged in a circular ring shape, and the lower clamping plate 10 is arranged in a wavy ring shape.

[0047] A clamping and positioning component is embedded in the housing 1. The housing 1 has multiple sets of slots 11, each set including two slots 11 arranged side by side. The housing 1 is connected to a positioning frame 12 located on both sides of the slot 11. The clamping and positioning component is embedded in the slot 11 through the positioning frame 12 and clamps the upper clamping piece 9 or the lower clamping piece 10.

[0048] A placement cylinder 18 is rotatably connected to the rotating plate 8, and a cylinder cover 19 is connected to the placement cylinder 18. A combined inspection cylinder 23 is placed in the placement cylinder 18, and multiple sets of placement cylinders 18 are connected in a circumferential array on the rotating plate 8.

[0049] As can be seen from the above, by setting an upper clamping plate 9 and a lower clamping plate 10 on the rotating plate 8, when the pesticide residue test sample is extracted by oscillation, after the sample to be tested is placed in the combined test tube 23, the lower clamping plate 10 is clamped by the clamping and positioning component. The motor 2 is started, and the motor 2 drives the rotating plate 8, the placement tube 18 and the combined test tube 23 to rotate through the telescopic tube. Since the lower clamping plate 10 is set in a wave-like ring, the rotating plate 8 will vibrate up and down. At this time, the combined test tube 23 vibrates up and down with the rotating plate 8, so that the substances in the sample are fully dissolved in the solution in the combined test tube 23. When it is necessary to separate the solid and liquid substances in the combined testing cylinder 23, the clamping and positioning component is moved to another slot 11, so that the clamping and positioning component clamps the upper clamping plate 9. Since the upper clamping plate 9 is set in a circular ring plate shape, the rotating plate 8 drives the combined testing cylinder 23 to rotate at high speed. The solid-liquid separation of the substances in the combined testing cylinder 23 is achieved through high-speed centrifugal force. The upper liquid in the combined testing cylinder 23 can be extracted for testing. The equipment platform can simultaneously meet the dual functional requirements of oscillation homogenization and centrifugal separation, effectively improving the pretreatment efficiency and avoiding the risk of sample transfer and contamination.

[0050] The telescopic cylinder includes a sleeve 3 fixedly connected to the output shaft of the motor 2 and a slide rod 5 slidably connected in the sleeve 3. The inner wall of the sleeve 3 is provided with a slide groove 4. A slider 6 is connected to the slide rod 5 and engaged in the slide groove 4. A first spring 7 is sleeved on the outside of the telescopic cylinder. One end of the first spring 7 abuts against the rotating plate 8 and the other end abuts against the motor 2.

[0051] As can be seen from the above, during the process of the motor 2 driving the telescopic cylinder to rotate, the output shaft of the motor 2 first drives the sleeve 3 to rotate, and the sleeve 3 drives the slide rod 5 to rotate through the slide groove 4 and the slider 6. At the same time, the slide rod 5 can also slide axially in the sleeve 3 through the slide groove 4 and the slider 6. In order to prevent the telescopic cylinder from extending and retracting arbitrarily, the first spring 7 is pre-compressed and supported on the telescopic cylinder to provide a limiting force for the telescopic cylinder and prevent the telescopic cylinder from jumping arbitrarily when there is no strong external force.

[0052] The clamping and positioning assembly includes a mounting block 13 and two insert rods 14 connected to the side of the mounting block 13. The insert rods 14 clamp the upper clamping piece 9 or the lower clamping piece 10. Two opposing positioning blocks 15 are slidably connected to the side of the mounting block 13 away from the insert rods 14. Pull tabs 16 are connected to the positioning blocks 15, and a second spring 17 is connected between the two positioning blocks 15.

[0053] Since the up-and-down movement of the rotating plate 8 depends on the clamping state of the clamping and positioning component with the upper clamping plate 9 or the lower clamping plate 10, when it is necessary for the rotating plate 8 to move up and down during rotation, thereby causing the placement cylinder 18 and the combined inspection cylinder 23 to vibrate up and down, the pull tab 16 can be used to drive the positioning block 15 to slide and compress the second spring 17. Then, the mounting block 13 of the clamping and positioning component is inserted into the lower slot 11, so that the two insert rods 14 are inserted into the lower clamping plate 10. Then, the pull tab 16 is released, and the compressed second spring 17 is reset and pushes the positioning block 15 outward. The positioning block 15 is inserted into the positioning frame 12, maintaining the stable insertion state of the insert rods 14. When it is necessary for the rotating plate 8 to rotate smoothly, it is only necessary to insert the clamping and positioning component into the upper slot 11, so that the insert rods 14 are inserted into the upper clamping plate 9.

[0054] The inner wall of the placement cylinder 18 is connected to a plurality of M-shaped positioning plates 20. The positioning plates 20 deform and engage with the combined inspection cylinder 23. When the combined inspection cylinder 23 is inserted into the placement cylinder 18, the positioning plates 20 deform and clamp the combined inspection cylinder 23. At this time, the positioning plates 20 apply an elastic clamping force to the combined inspection cylinder 23. This elastic clamping force makes the combined inspection cylinder 23 stably placed in the placement cylinder 18, preventing the combined inspection cylinder 23 from shaking in the placement cylinder 18.

[0055] A small toothed ring 21 is connected to the outer wall of the placement cylinder 18, and a large toothed ring 22 is connected to the box body 1. The small toothed ring 21 meshes with the large toothed ring 22. The width of the large toothed ring 22 is greater than the width of the small toothed ring 21. When the placement cylinder 18 vibrates up and down, the small toothed ring 21 can slide against the inner wall of the large toothed ring 22. When the rotating plate 8 drives the placement cylinder 18 to rotate, the placement cylinder 18 drives the small toothed ring 21 to roll against the inside of the large toothed ring 22. At this time, the small toothed ring 21 rotates itself and drives the placement cylinder 18 to rotate, which in turn causes the combined test cylinder 23 in the placement cylinder 18 to rotate. This is beneficial for the target substance of the sample to be tested in the combined test cylinder 23 to be fully dissolved in the reagent.

[0056] The combined inspection cylinder 23 includes a lower inspection cylinder 231, a connecting frame 232 connected to the upper end of the lower inspection cylinder 231, and an upper inspection cylinder 234 connected to the upper end of the connecting frame 232. A partition plate 233 is connected to the middle of the connecting frame 232. Multiple crack grooves are printed on the partition plate 233. A sieve plate 235 is connected to the lower end of the upper inspection cylinder 234.

[0057] During testing, the substance to be tested and the reagent are first placed in the lower test cylinder 231, and the connecting frame 232 and the upper test cylinder 234 are installed in sequence. Then, the combined test cylinder 23 is placed in the placement cylinder 18 for up-and-down vibration extraction. After the substance to be tested and the reagent are fully mixed, high-speed centrifugation is performed. After the substance in the combined test cylinder 23 is separated into solid and liquid, the upper test cylinder 234 is pressed down, and the upper test cylinder 234 breaks through the isolation plate 233, causing the isolation plate 233 to break along the rupture groove. At this time, the lower end of the upper test cylinder 234 is inserted into the lower test cylinder 231. The supernatant in the lower test cylinder 231 is filtered through the sieve plate 235 and enters the upper test cylinder 234. The tester can then extract the supernatant in the upper test cylinder 234 for testing.

[0058] The cover 101 is equipped with a display panel and a control button set, which allows testers to operate the equipment.

[0059] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sample oscillation extraction device for pesticide residue detection with solid-liquid separation function, comprising a housing (1) and a housing cover (101) hinged to the housing (1), characterized in that, Also includes: A motor (2) is connected in the housing (1), and a telescopic cylinder is connected to the output shaft of the motor (2), which extends and retracts axially. A rotating plate (8) is connected to the end of the telescopic cylinder. An upper clamping plate (9) and a lower clamping plate (10) are connected to the side of the rotating plate (8). The upper clamping plate (9) is arranged in a circular ring shape, and the lower clamping plate (10) is arranged in a wave-shaped ring. A clamping and positioning component is embedded in the housing (1). The housing (1) has multiple sets of slots (11), each set containing two slots (11) arranged side by side. The housing (1) is connected to a positioning frame (12) on both sides of the slot (11). The clamping and positioning component is embedded in the slot (11) through the positioning frame (12) and clamps the upper clamping piece (9) or the lower clamping piece (10). The placement cylinder (18) is rotatably connected to the rotating plate (8), and a cylinder cover (19) is connected to the placement cylinder (18). A combined inspection cylinder (23) is placed in the placement cylinder (18).

2. The pesticide residue detection sample oscillation extraction device with solid-liquid separation function according to claim 1, characterized in that, The telescopic cylinder includes a sleeve (3) fixedly connected to the output shaft of the motor (2) and a slide rod (5) slidably connected in the sleeve (3). The inner wall of the sleeve (3) is provided with a slide groove (4). A slider (6) is connected to the slide rod (5) and engaged in the slide groove (4). A first spring (7) is sleeved on the outside of the telescopic cylinder. One end of the first spring (7) abuts against the rotating plate (8) and the other end abuts against the motor (2).

3. The pesticide residue detection sample oscillation extraction device with solid-liquid separation function according to claim 1, characterized in that, The clamping and positioning assembly includes a mounting block (13) and two insert rods (14) connected to the side of the mounting block (13). The insert rods (14) clamp the upper clamping piece (9) or the lower clamping piece (10). The mounting block (13) has two opposing positioning blocks (15) slidably connected to the side away from the insert rods (14). Pull tabs (16) are connected to the positioning blocks (15). A second spring (17) is connected between the two positioning blocks (15).

4. The pesticide residue detection sample oscillation extraction device with solid-liquid separation function according to claim 1, characterized in that, The inner wall of the placement cylinder (18) is connected to a plurality of positioning pieces (20) arranged in an M shape, and the positioning pieces (20) are deformed and snapped into the combined inspection cylinder (23).

5. The pesticide residue detection sample oscillation extraction device with solid-liquid separation function according to claim 1, characterized in that, The outer wall of the placement cylinder (18) is connected to a small toothed ring (21), and the box body (1) is connected to a large toothed ring (22). The small toothed ring (21) meshes with the large toothed ring (22).

6. The pesticide residue detection sample oscillation extraction device with solid-liquid separation function according to claim 1, characterized in that, The combined inspection cylinder (23) includes a lower inspection cylinder (231), a connecting frame (232) connected to the upper end of the lower inspection cylinder (231), and an upper inspection cylinder (234) connected to the upper end of the connecting frame (232). A partition plate (233) is connected in the middle of the connecting frame (232). Multiple crack grooves are printed on the partition plate (233). A sieve plate (235) is connected to the lower end of the upper inspection cylinder (234).

7. The pesticide residue detection sample oscillation extraction device with solid-liquid separation function according to claim 1, characterized in that, The box cover (101) is connected to a display panel and a control button group.

8. The pesticide residue detection sample oscillation extraction device with solid-liquid separation function according to claim 1, characterized in that, The rotating plate (8) has multiple sets of placement cylinders (18) connected in a circular array.

Images