High-precision soil extraction device

Abstract

The invention relates to the technical field of soil pesticide residue extraction, and discloses a high-precision soil extraction device which comprises a support, a fixing box, a screening part and a driving part. A loading frame is installed on the support, the fixing box is installed in the middle of the support, a mixing piece is installed in the fixing box, a piston assembly connected with the mixing piece is installed on the side face of the fixing box, and a liquid supply piece is installed on the piston assembly; the screening part is arranged in the middle of the loading frame and is in sliding fit with the loading frame, the bottom of the screening part is matched with the mixing part, a linkage part is connected between the piston assembly and the screening part, and the screening part is driven by the driving part to transversely reciprocate to screen materials. Soil screening and impurity intercepting are achieved through transverse reciprocating movement of the screening part, meanwhile, solvent liquid enters a hollow ball of the mixing part in an impact posture to be mixed with soil through the push-pull effect of the piston assembly, traditional static soaking limitation is broken through, the soaking time is shortened, and the solvent volatilization and pesticide degradation risks are reduced; and the detection accuracy and reliability are improved.

Description

Technical Field

[0001] This invention relates to the field of soil pesticide residue extraction technology, and in particular to a high-precision soil extraction device. Background Technology

[0002] In the process of crop production, the use of pesticides is essential to prevent and control pests and diseases and to ensure crop yield and quality. However, excessive or improper use of pesticides can lead to excessive pesticide residues in the soil. These pesticide residues not only pollute the soil environment, but may also have adverse effects on subsequent crops through bioaccumulation and food chain transmission, thereby threatening the ecological environment and human health. In order to effectively control the use of pesticides and ensure the safety of soil and crops, it is necessary to detect pesticide residues in the soil. In the existing technology, the method of soaking soil samples in organic solvents is usually used to extract pesticide residues in the soil. In this way, the pesticide residues in the soil gradually dissolve into the solvent, thereby realizing the extraction and detection of pesticide residues in the soil.

[0003] In the process of extracting pesticide residues by soaking soil in organic solvents, the static soaking method requires a long soaking time for the pesticide residues in the soil to gradually dissolve into the solvent. This not only reduces the detection efficiency but also increases the risk of solvent evaporation and pesticide degradation. Furthermore, the relatively limited contact between soil particles and the solvent makes it difficult for the solvent to fully penetrate into the tiny pores of the soil. As a result, the pesticide residues in the soil cannot fully contact and interact with the solvent, leading to some pesticide residues not being effectively extracted, which in turn affects the accuracy and reliability of the detection results.

[0004] To address the aforementioned issues, this application proposes a high-precision soil extraction device. Summary of the Invention

[0005] This invention proposes a high-precision soil extraction device, which solves the problems of the static soaking method used in related technologies to extract pesticide residues from soil. These methods have the drawbacks of long soaking time, reduced detection efficiency, increased risk of solvent evaporation and pesticide degradation, limited contact between soil particles and solvent, and difficulty in solvent fully penetrating micropores, resulting in some pesticide residues not being effectively extracted, thus affecting the accuracy and reliability of the detection results.

[0006] The present invention proposes a high-precision soil extraction device, comprising a support, a fixing box, a screening component, and a driving component;

[0007] A loading frame is installed on the support, a fixing box is installed in the middle of the support, a mixing component is installed inside the fixing box, a piston assembly connected to the mixing component is installed on the side of the fixing box, and a liquid supply component is installed on the piston assembly.

[0008] The screening component is located in the middle of the loading frame and slides therewith, and the bottom of the screening component is engaged with the mixing component. The piston assembly is connected to the screening component by a linkage component. The screening component is driven by the driving component to move laterally and reciprocally to screen the material, so that the screened material enters the mixing component.

[0009] When the screening component moves laterally back and forth, the piston assembly is driven by the linkage to push and pull, drawing the solution from the liquid supply component into it and pressing it into the mixing component to mix with the materials therein.

[0010] As a further optimization of the present invention, the mixing component includes a hopper, the top of the fixed box is open, the hopper is installed in the open and cooperates with the screening component, the bottom of the hopper is connected to a discharge pipe located in the fixed box, the bottom of the discharge pipe is connected to a hollow ball, the piston assembly is connected to the hollow ball, the bottom of the hollow ball is connected to a discharge pipe passing through the bottom of the fixed box, and a valve is installed on the discharge pipe.

[0011] As a further optimization of the present invention, an axial flow blade is provided inside the hollow sphere, and the axial flow blade rotates in conjunction with the inner wall of the hollow sphere.

[0012] As a further optimization of the present invention, the piston assembly includes a fixed cylinder and a piston part. The fixed cylinder is installed on the side of the fixed box. One end of the fixed cylinder is connected to a liquid supply pipe, and the liquid supply pipe is connected to a hollow ball. A one-way drain valve is installed on the liquid supply pipe. The piston part is slidably disposed inside the fixed cylinder and is connected to a linkage component. The liquid supply component is installed on the top of one end of the fixed cylinder.

[0013] As a further optimization of the present invention, the piston part includes a piston body, which is slidably disposed in a fixed cylinder. A shaft is fixed to the side of the piston body, and the shaft slides through the other end of the fixed cylinder and is connected to a linkage. The other end of the fixed cylinder is provided with a plurality of circumferentially arranged air holes, which are used for the smooth sliding of the piston body.

[0014] As a further optimization of the present invention, the liquid supply component includes a liquid supply cylinder, which is disposed above one end of the fixed cylinder. A conduit connected to the top of one end of the fixed cylinder is installed at the bottom of the liquid supply cylinder. A one-way liquid inlet valve is installed on the conduit. The liquid supply cylinder is filled with a solution.

[0015] As a further optimization of the present invention, the outer periphery of the liquid supply cylinder is connected to a liquid delivery pipe, and the end of the liquid delivery pipe away from the liquid supply cylinder is connected to a liquid supply pump.

[0016] As a further optimization of the present invention, the linkage includes a linkage rod and a strip block. A vertically arranged strip block is installed at the end of the shaft rod away from the piston body. The linkage rod is connected to the top of the strip block and arranged laterally. One end of the linkage rod slides through one end of the loading frame and is connected to the screening component.

[0017] As a further optimization of the present invention, the screening component includes a conical cover, a conical screening hopper, and a flexible cover. The conical cover is located in the middle of the loading frame. Slide grooves are formed on both inner walls of the loading frame. Slider blocks are installed on both sides of the conical cover. The two sliders are slidably engaged with the two slide grooves respectively. One end of the linkage rod is connected to the outer periphery of the conical cover. The conical cover is driven by the driving component to drive the slider to reciprocate along the slide groove. An opening is integrally formed at the bottom of the conical cover. The conical screening hopper is placed inside the conical cover and is interference-fitted with it. The bottom of the conical screening hopper has densely arranged screen holes. The flexible cover is connected between the conical cover and the discharge hopper and forms a discharge channel inside it.

[0018] As a further optimization of the present invention, the driving component includes an assembly block, which is installed at the other end of the loading frame. A motor is installed at the bottom of the assembly block, and the output end of the motor is connected to a turntable located above the assembly block. An offset connecting rod is rotatably connected to the turntable, and the connecting rod is arranged laterally and extends to the top of the conical cover. One end of the connecting rod is rotatably connected to a rotating rod, and the bottom end of the rotating rod is rotatably engaged with the top edge of the conical cover.

[0019] The above-described technical solution of the present invention has the following beneficial technical effects:

[0020] 1. This invention uses a drive component to drive the screening component to move laterally back and forth, thereby achieving soil screening, intercepting large stones and impurities, and allowing the soil to enter the mixing component in the fixed box. When the screening component moves, the linkage component drives the piston part of the piston assembly to push and pull laterally in the fixed cylinder. When the piston part moves outward, the solvent liquid from the liquid supply component enters the fixed cylinder. When it moves inward, it pushes the solvent liquid into the hollow sphere of the mixing component to mix with the soil, generating an impact effect. This design allows the soil to be fully dispersed, removing impurities. Moreover, the solvent liquid enters the hollow sphere with an impact posture to mix with the soil, breaking the limitations of traditional static soaking, shortening the soaking time, reducing the risk of solvent evaporation and pesticide degradation, allowing the solvent to fully penetrate the tiny pores of the soil and fully contact the residual pesticides, thereby improving the accuracy and reliability of detection.

[0021] 2. When the solvent liquid enters the hollow sphere in the mixing component in an impact manner, it can drive the axial flow blades inside to rotate. When the axial flow blades rotate, the soil and solvent liquid can be further mixed, improving the uniformity of the mixture. This uniform mixing effect helps to ensure the representativeness and consistency of the soil sample in the subsequent testing process, avoiding detection deviations caused by uneven mixing, thus providing a strong guarantee for obtaining more accurate test results and further improving the overall quality of pesticide residue testing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a high-precision soil extraction device proposed in this invention;

[0023] Figure 2 This is an internal sectional view of the fixing box of the present invention;

[0024] Figure 3 For the present invention Figure 2 Overall front view;

[0025] Figure 4 This is a schematic diagram of the structure of the hybrid component of the present invention;

[0026] Figure 5 This is a schematic diagram of the mating structure between the piston assembly and the liquid supply component of the present invention;

[0027] Figure 6 This is an internal sectional view of the fixing cylinder of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the screening component of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the driving component of the present invention.

[0030] Reference numerals: 1. Support; 101. Loading frame; 102. Slide chute; 2. Fixed box; 3. Mixing component; 31. Hopper; 32. Discharge pipe; 33. Hollow sphere; 34. Discharge pipe; 341. Valve; 35. Axial flow impeller; 4. Piston assembly; 41. Fixed cylinder; 411. Air hole; 42. Piston part; 421. Piston body; 422. Shaft; 43. Liquid supply pipe; 431. One-way discharge. 5. Liquid valve; 6. Liquid supply component; 7. Liquid supply cylinder; 8. Conical shroud; 9. Conical sieve hopper; 10. Sieve hole; 11. Flexible shroud; 12. Sliding block; 13. Linkage component; 14. Linkage rod; 15. Strip block; 16. Drive component; 17. Assembly block; 18. Motor; 19. Turntable; 20. Connecting rod; 21. Rotating rod. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0032] like Figure 1-8 As shown, the present invention proposes a high-precision soil extraction device, which includes a support 1, a fixed box 2, a screening component 6 and a driving component 8;

[0033] A loading frame 101 is installed on the bracket 1, a fixing box 2 is installed in the middle of the bracket 1, a mixing component 3 is installed inside the fixing box 2, a piston assembly 4 connected to the mixing component 3 is installed on the side of the fixing box 2, and a liquid supply component 5 is installed on the piston assembly 4.

[0034] The screening component 6 is located in the middle of the loading frame 101 and slides with it. The bottom of the screening component 6 is engaged with the mixing component 3. The piston assembly 4 is connected to the screening component 6 by a linkage component 7. The screening component 6 is driven by the driving component 8 to move laterally and reciprocate to screen the material, so that the screened material enters the mixing component 3.

[0035] When the screening component 6 moves laterally back and forth, the piston assembly 4 is driven by the linkage component 7 to push and pull, drawing the solution in the liquid supply component 5 back and forth into it and pressing it into the mixing component 3 to mix with the materials therein.

[0036] In this invention, soil samples are poured into a sieve 6, and a drive unit 8 drives the sieve 6 to move laterally back and forth within a loading frame 101. During this process, the sieve 6 sieves the soil material, selecting fine soil particles that meet the requirements and allowing them to enter the mixing unit 3 below. At the same time, it intercepts impurities such as stones and weeds in the soil, ensuring the purity of the soil entering the mixing unit 3. While the sieve 6 moves laterally back and forth, the piston assembly 4 is driven to push and pull synchronously through the transmission action of the linkage unit 7. When the piston assembly 4 is pulled outward, a negative pressure is generated, drawing the solvent used to extract pesticide residues from the liquid supply unit 5 into the piston assembly 4. When the piston assembly 4 is pushed inward, the extracted solvent is forced into the mixing unit 3, allowing the solvent to fully contact and mix with the soil entering the mixing unit 3. This linkage design achieves synchronous sieving and solvent supply without the need for separate control, simplifying the operation process and improving the timeliness of soil and solvent mixing.

[0037] In this embodiment, the mixing component 3 includes a hopper 31. The top of the fixed box 2 has an opening, and the hopper 31 is installed inside the opening and cooperates with the screening component 6. The bottom of the hopper 31 is connected to a discharge pipe 32 located inside the fixed box 2. The bottom of the discharge pipe 32 is connected to a hollow ball 33. The piston assembly 4 is connected to the hollow ball 33. The bottom of the hollow ball 33 is connected to a discharge pipe 34 that passes through the bottom of the fixed box 2, and a valve 341 is installed on the discharge pipe 34. The screened fine soil particles will enter the hopper 31 and flow along the discharge pipe 34. The tube 32 enters the hollow sphere 33. The spherical structure of the hollow sphere 33 facilitates the full flow and collision of soil and solvent inside. Compared with ordinary columnar or square mixing chambers, the spherical structure can reduce mixing dead zones and improve the mixing effect. After the piston assembly 4 presses the solvent into the hollow sphere 33, the solvent and soil complete the mixing and extraction process inside the hollow sphere 33. After the mixing is completed, the valve 341 on the discharge pipe 34 is opened, and the mixed soil and solvent mixture can be discharged from the device through the discharge pipe 34 for subsequent detection and analysis.

[0038] In this embodiment, an axial flow blade 35 is provided inside the hollow sphere 33, and the axial flow blade 35 rotates in conjunction with the inner wall of the hollow sphere 33. When the piston assembly 4 presses the solvent into the hollow sphere 33, the solvent will generate a certain impact force. Due to the rotational engagement between the axial flow blade 35 and the inner wall of the hollow sphere 33, the impact force of the solvent will drive the axial flow blade 35 to rotate inside the hollow sphere 33. During the rotation of the axial flow blade 35, it will stir the soil and solvent inside the hollow sphere 33, breaking the agglomeration of soil particles, so that the solvent can penetrate into the tiny pores of the soil more fully, and come into full contact with and dissolve the residual pesticides in the soil. Compared with mixing by relying solely on the impact of the solvent itself, the stirring effect of the axial flow blade 35 can improve the mixing uniformity and mixing efficiency, further improve the extraction rate of pesticide residues, and reduce detection errors caused by insufficient mixing.

[0039] In this embodiment, the piston assembly 4 includes a fixed cylinder 41 and a piston part 42. The fixed cylinder 41 is installed on the side of the fixed box 2. One end of the fixed cylinder 41 is connected to a liquid supply pipe 43, and the liquid supply pipe 43 is connected to a hollow ball 33. A one-way drain valve 431 is installed on the liquid supply pipe 43. The piston part 42 is slidably disposed inside the fixed cylinder 41, and the piston part 42 is connected to the linkage 7. The liquid supply component 5 is installed on the top of one end of the fixed cylinder 41.

[0040] When the screening component 6 moves laterally, the piston part 42 can be driven to slide inside the fixed cylinder 41 by the linkage part 7. When the piston part 42 moves away from the liquid supply pipe 43, a negative pressure is formed inside the fixed cylinder 41. At this time, the solvent in the liquid supply component 5 enters the fixed cylinder 41 under the action of pressure difference. When the piston part 42 moves closer to the liquid supply pipe 43, the pressure inside the fixed cylinder 41 increases, pushing the internal solvent towards the liquid supply pipe 43. The one-way drain valve 431 on the liquid supply pipe 43 only allows the solvent to flow from the fixed cylinder 41 to the hollow ball 33, preventing the solvent from flowing back when the pressure changes. This ensures that the solvent in the fixed cylinder 41 can be effectively delivered to the hollow ball 33 each time the piston part 42 is pushed, avoiding insufficient solvent in the mixing component 3 due to solvent backflow, which would affect the mixing and extraction effect of soil and solvent.

[0041] In this embodiment, the piston part 42 includes a piston body 421, which is slidably disposed inside the fixed cylinder 41. A shaft 422 is fixed to the side of the piston body 421, and the shaft 422 slides through the other end of the fixed cylinder 41 and is connected to the linkage 7. The other end of the fixed cylinder 41 is provided with a plurality of circumferentially arranged air holes 411, which are used for the smooth sliding of the piston body 421. When the linkage 7 moves under the drive of the screening component 6, the power is transmitted to the piston body 421 through the shaft 422, so that the piston body 421 slides along the cylinder wall inside the fixed cylinder 41. During the sliding process, the volume of the space on one side of the piston body 421 inside the fixed cylinder 41 changes, and the air pressure on the other side of the space also changes accordingly. The multiple circumferentially arranged air holes 411 opened at the other end of the fixed cylinder 41 can balance the air pressure on the other side of the piston body 421 in a timely manner, avoiding the piston body 421 from sliding due to excessive or insufficient air pressure, ensuring that the piston body 421 can always move smoothly inside the fixed cylinder 41, thereby ensuring the extraction and pushing of solvent by the piston assembly 4, avoiding the impact of the solvent supply rhythm due to the piston body 421 being stuck, and thus ensuring the continuity of the soil and solvent mixing and extraction process.

[0042] In this embodiment, the liquid supply component 5 includes a liquid supply cylinder 51, which is positioned above one end of the fixed cylinder 41. A conduit 511, connected to the top of one end of the fixed cylinder 41, is installed at the bottom of the liquid supply cylinder 51. A one-way inlet valve 512 is installed on the conduit 511. The liquid supply cylinder 51 is filled with solution. When the piston body 421 slides outward inside the fixed cylinder 41 and a negative pressure is formed inside the fixed cylinder 41, the solvent in the liquid supply cylinder 51 flows to the fixed cylinder 41 through the conduit 511 under the action of the negative pressure. The one-way inlet valve 512 on the conduit 511 only allows the solvent to flow from the liquid supply cylinder 51 into the fixed cylinder 41, preventing the solvent in the fixed cylinder 41 from flowing back to the liquid supply cylinder 51 through the conduit 511 when the piston body 421 is pushed inward. This avoids waste caused by solvent backflow or insufficient solvent in the fixed cylinder 41, which would affect the normal operation of soil pesticide residue extraction.

[0043] In this embodiment, a liquid supply pipe 52 is connected to the outer periphery of the liquid supply cylinder 51, and a liquid supply pump is connected to the end of the liquid supply pipe 52 away from the liquid supply cylinder 51. When the solvent in the liquid supply cylinder 51 decreases to a certain amount due to continuous supply, the liquid supply pump is started. The liquid supply pump delivers externally stored solvent to the liquid supply cylinder 51 through the liquid supply pipe 52 to replenish the solvent in the liquid supply cylinder 51 in a timely manner.

[0044] In this embodiment, the linkage 7 includes a linkage rod 71 and a strip 72. The end of the shaft 422 away from the piston body 421 is equipped with a vertically arranged strip 72. The linkage rod 71 is connected to the top of the strip 72 and arranged laterally. One end of the linkage rod 71 slides through one end of the loading frame 101 and is connected to the screening component 6. When the screening component 6 moves laterally reciprocally under the action of the driving component 8, it will drive the linkage rod 71 to move laterally reciprocally in sync. The linkage rod 71 then drives the shaft 422 to move laterally reciprocally through the strip 72, thereby causing the piston body 421 to slide inside the fixed cylinder 41.

[0045] In this embodiment, the screening component 6 includes a conical cover 61, a conical screening hopper 62, and a flexible cover 63. The conical cover 61 is located in the middle of the loading frame 101. The inner walls of both sides of the loading frame 101 are provided with grooves 102. Slider 64 is installed on both sides of the conical cover 61. The two sliders 64 are slidably engaged with the two grooves 102 respectively. One end of the linkage rod 71 is connected to the outer periphery of the conical cover 61. The conical cover 61 is driven by the driving component 8 to drive the slider 64 to reciprocate along the grooves 102. An opening is integrally formed at the bottom of the conical cover 61. The conical screening hopper 62 is placed inside the conical cover 61 and is interference-fitted with it. The bottom of the conical screening hopper 62 is provided with densely arranged screen holes 621. The flexible cover 63 is connected between the conical cover 61 and the discharge hopper 31, and a discharge channel is formed inside it.

[0046] When the driving component 8 drives the conical cover 61 to move the slider 64 back and forth along the slide groove 102, the conical screening hopper 62 inside the conical cover 61 moves synchronously with the conical cover 61. During the movement, the soil fed into the conical screening hopper 62 is subjected to vibration and inertia. Fine soil particles are screened out through the densely arranged screen holes 621 at the bottom, while impurities such as stones and weeds are left in the conical screening hopper 62, thus achieving soil screening and purification. Since the conical screening hopper 62 and the conical cover 61 are tightly connected due to the interference fit, no relative displacement will occur during the movement, ensuring stable screening. The screened fine soil particles enter the discharge channel inside the flexible cover 63 through the opening at the bottom of the conical cover 61. The flexible cover 63 has a certain degree of flexibility and can adapt to the reciprocating movement of the conical cover 61, always maintaining the connection with the discharge hopper 31, preventing fine soil particles from scattering during the fall, ensuring that all fine soil particles can enter the discharge hopper 31, improving soil collection efficiency, and also preventing soil particle dust from polluting the environment.

[0047] It should be noted that after the soil is screened, the conical screening hopper 62 can be removed from the conical cover 61 to facilitate the cleaning of stones and other impurities inside the conical screening hopper 62 by the staff.

[0048] In this embodiment, the driving component 8 includes an assembly block 81, which is installed at the other end of the loading frame 101. A motor 82 is installed at the bottom of the assembly block 81. The output end of the motor 82 is connected to a turntable 83 located above the assembly block 81. An offset connecting rod 84 is rotatably connected to the turntable 83. The connecting rod 84 is arranged laterally and extends to the top of the conical cover 61. One end of the connecting rod 84 is rotatably connected to a rotating rod 85, and the bottom end of the rotating rod 85 is rotatably engaged with the top edge of the conical cover 61.

[0049] After the motor 82 starts, it drives the turntable 83 to rotate around the output shaft of the motor 82. Since the connecting rod 84 is biased on the turntable 83, when the turntable 83 rotates, one end of the connecting rod 84 moves in a circle with the turntable 83, while the other end of the connecting rod 84 is rotatably connected to the top edge of the conical cover 61 through the rotating rod 85. Under the action of the rotation of the turntable 83, the connecting rod 84 converts the circular motion into a lateral reciprocating motion, and transmits this reciprocating motion to the conical cover 61 through the rotating rod 85, so that the conical cover 61 moves laterally back and forth along the slide groove 102 in the loading frame 101.

[0050] The specific working principle of this invention is as follows:

[0051] The soil sample to be tested is put into the conical screening hopper 62 of the screening component 6. The motor 82 in the drive component 8 is started. The output end of the motor 82 drives the turntable 83 to rotate. The connecting rod 84, which is biased on the turntable 83, moves in a circular motion with the turntable 83. The connecting rod 84 converts the circular motion into a lateral reciprocating motion through the rotating rod 85 and transmits it to the conical cover 61. This causes the sliders 64 on both sides of the conical cover 61 to move laterally and reciprocally along the sliding grooves 102 on both sides of the inner wall of the loading frame 101. The conical screening hopper 62 moves synchronously with the conical cover 61.

[0052] During the transverse reciprocating movement of the conical screening hopper 62, the soil sample is subjected to vibration and inertia. Fine soil particles are screened out through the dense sieve holes 621 at the bottom of the conical screening hopper 62, while impurities remain inside the conical screening hopper 62. The screened fine soil particles enter the discharge channel inside the flexible cover 63 through the opening at the bottom of the conical cover 61. The flexible cover 63 adapts to the reciprocating movement of the conical cover 61 and maintains its connection with the discharge hopper 31. The fine soil particles enter the discharge hopper 31 of the mixing component 3 through the discharge channel, and then enter the hollow ball 33 along the discharge pipe 32.

[0053] While the conical cover 61 moves laterally back and forth, the conical cover 61 drives the strip 72 to move laterally back and forth via the linkage rod 71. The strip 72 drives the shaft 422 connected to it to move laterally back and forth synchronously. The shaft 422 drives the piston body 421 to slide inside the fixed cylinder 41 of the piston assembly 4. When the piston body 421 moves away from the liquid supply pipe 43, a negative pressure is formed inside the fixed cylinder 41. Under the action of the negative pressure, the solvent in the liquid supply cylinder 51 enters the fixed cylinder 41 through the one-way liquid inlet valve 512 on the conduit 511. When the piston body 421 moves closer to the liquid supply pipe 43, the pressure inside the fixed cylinder 41 increases. The solvent is forced into the hollow ball 33 through the one-way liquid outlet valve 431 on the liquid supply pipe 43. The air hole 411 at the other end of the fixed cylinder 41 balances the air pressure when the piston body 421 slides, ensuring that the piston body 421 moves smoothly.

[0054] When the solvent is forced into the hollow sphere 33, it creates an impact force, which drives the axial flow blade 35 inside the hollow sphere 33 to rotate. The axial flow blade 35 stirs the fine soil particles and solvent entering the hollow sphere 33, making the two fully mixed. The solvent penetrates into the tiny pores of the soil and dissolves pesticide residues in the soil.

[0055] After the soil and solvent have been fully mixed and extracted in the hollow sphere 33 for a period of time, the valve 341 on the discharge pipe 34 is opened, and the mixture of soil and solvent is discharged through the discharge pipe 34. During this process, the sampling bottle can be placed at the bottom of the discharge pipe 34 to collect the discharged mixture for subsequent pesticide residue detection and analysis. After the detection is completed, the motor 82 is turned off, and the impurities in the conical sieve 62 are cleaned to prepare for the next soil extraction and detection.

[0056] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A high-precision soil extraction device, characterized in that, It includes a support (1), a fixed box (2), a screening component (6), and a driving component (8); A loading frame (101) is installed on the bracket (1), a fixing box (2) is installed in the middle of the bracket (1), a mixing component (3) is installed inside the fixing box (2), a piston assembly (4) connected to the mixing component (3) is installed on the side of the fixing box (2), and a liquid supply component (5) is installed on the piston assembly (4). The screening component (6) is located in the middle of the loading frame (101) and slides therewith. The bottom of the screening component (6) is engaged with the mixing component (3). A linkage component (7) is connected between the piston assembly (4) and the screening component (6). The screening component (6) is driven by the driving component (8) to move laterally and reciprocate to screen the material, so that the screened material enters the mixing component (3). When the screening component (6) moves laterally back and forth, the piston assembly (4) is driven by the linkage component (7) to push and pull, so that the solution in the liquid supply component (5) is repeatedly drawn into it and pressed into the mixing component (3) to mix with the material therein.

2. The high-precision soil extraction device according to claim 1, characterized in that, The mixing component (3) includes a hopper (31), the top of the fixed box (2) is open, the hopper (31) is installed in the open and cooperates with the screening component (6), the bottom of the hopper (31) is connected to a discharge pipe (32) located in the fixed box (2), the bottom of the discharge pipe (32) is connected to a hollow ball (33), the piston assembly (4) is connected to the hollow ball (33), the bottom of the hollow ball (33) is connected to a discharge pipe (34) passing through the bottom of the fixed box (2), and a valve (341) is installed on the discharge pipe (34).

3. The high-precision soil extraction device according to claim 2, characterized in that, The hollow sphere (33) is provided with an axial flow blade (35), and the axial flow blade (35) rotates with the inner wall of the hollow sphere (33).

4. The high-precision soil extraction device according to claim 3, characterized in that, The piston assembly (4) includes a fixed cylinder (41) and a piston part (42). The fixed cylinder (41) is installed on the side of the fixed box (2). One end of the fixed cylinder (41) is connected to a liquid supply pipe (43), and the liquid supply pipe (43) is connected to a hollow ball (33). A one-way drain valve (431) is installed on the liquid supply pipe (43). The piston part (42) is slidably disposed in the fixed cylinder (41), and the piston part (42) is connected to a linkage (7). The liquid supply component (5) is installed on the top of one end of the fixed cylinder (41).

5. The high-precision soil extraction device according to claim 4, characterized in that, The piston part (42) includes a piston body (421), which is slidably disposed in a fixed cylinder (41). A shaft (422) is fixed on the side of the piston body (421), and the shaft (422) slides through the other end of the fixed cylinder (41) and is connected to the linkage (7). A plurality of circumferentially arranged air holes (411) are provided at the other end of the fixed cylinder (411), and the air holes (411) are used for the smooth sliding of the piston body (421).

6. The high-precision soil extraction device according to claim 4, characterized in that, The liquid supply component (5) includes a liquid supply cylinder (51), which is located above one end of the fixed cylinder (41). A conduit (511) connected to the top of one end of the fixed cylinder (41) is installed at the bottom of the liquid supply cylinder (51). A one-way liquid inlet valve (512) is installed on the conduit (511). The liquid supply cylinder (51) is filled with a solution.

7. A high-precision soil extraction device according to claim 6, characterized in that, The outer periphery of the liquid supply cylinder (51) is connected to a liquid delivery pipe (52), and the end of the liquid delivery pipe (52) away from the liquid supply cylinder (51) is connected to a liquid supply pump.

8. A high-precision soil extraction device according to claim 5, characterized in that, The linkage component (7) includes a linkage rod (71) and a strip (72). The end of the shaft (422) away from the piston body (421) is equipped with a vertically arranged strip (72). The linkage rod (71) is connected to the top of the strip (72) and arranged laterally. One end of the linkage rod (71) slides through one end of the loading frame (101) and is connected to the screening component (6).

9. A high-precision soil extraction device according to claim 8, characterized in that, The screening component (6) includes a conical cover (61), a conical screening hopper (62), and a flexible cover (63). The conical cover (61) is located in the middle of the loading frame (101). Slide grooves (102) are provided on both inner walls of the loading frame (101). Sliding blocks (64) are installed on both sides of the conical cover (61). The two sliding blocks (64) are respectively slidably engaged with the two slide grooves (102). One end of the linkage rod (71) is connected to the outer periphery of the conical cover (61). The conical cover (61) is driven by the driving component (8) to drive the slider (64) to reciprocate along the slide groove (102). The bottom of the conical cover (61) has an integrally formed opening. The conical screening hopper (62) is placed inside the conical cover (61) and is interference-fitted with it. The bottom of the conical screening hopper (62) has densely arranged screen holes (621). The flexible cover (63) is connected between the conical cover (61) and the discharge hopper (31), and a discharge channel is formed inside it.

10. A high-precision soil extraction device according to claim 9, characterized in that, The drive unit (8) includes an assembly block (81) which is mounted on the other end of the loading frame (101). A motor (82) is mounted on the bottom of the assembly block (81). The output end of the motor (82) is connected to a turntable (83) located above the assembly block (81). An offset connecting rod (84) is rotatably connected to the turntable (83). The connecting rod (84) is arranged laterally and extends to the top of the conical cover (61). One end of the connecting rod (84) is rotatably connected to a rotating rod (85), and the bottom end of the rotating rod (85) is rotatably engaged with the top edge of the conical cover (61).

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