A soil fertilizer nutrient detection pretreatment device

Abstract

The utility model discloses a soil fertilizer nutrient detection pretreatment device, including the crushing chamber, still including the fixedly connected in the grinding chamber bottom's grinding chamber. Through the meshing of first circular gear and second circular gear, drive first crushing roller and second crushing roller synchronous reverse rotation, can carry out the primary crushing to soil, fertilizer, ensure that material gets even and effective preliminary processing, and the soil, fertilizer after crushing enter the grinding chamber through the flow guide slope of crushing chamber bottom, and with the transmission effect of conveyer belt, synchronous drive grinding cam to rotate in the crushing process, make grinding cam and grinding concave wheel in the grinding chamber cooperation, further grind the material after primary crushing, realized the linkage of crushing and grinding procedure, reduced the manpower input and operation time greatly, improved the pretreatment efficiency significantly, in addition, still effectively avoided the sample exposure in the air and introduced the impurity, and then improved the accuracy of subsequent detection.

Description

Technical Field

[0001] This utility model relates to the field of pretreatment device technology, and in particular to a soil fertilizer nutrient detection pretreatment device. Background Technology

[0002] Soil and fertilizer nutrient testing refers to the process of quantitatively or qualitatively analyzing the nutrient components, physicochemical properties, and related indicators of soil and fertilizers (including organic fertilizers, chemical fertilizers, and new fertilizers) using professional technical means and instruments. Its core purpose is to accurately grasp the soil fertility status, fertilizer nutrient content, and availability, providing data support for scientific fertilization, soil improvement, and agricultural production decisions. It is a key link in realizing "soil testing and formula fertilization" and "precision agriculture." To improve the accuracy of soil and fertilizer nutrient testing, the soil needs to be ground before testing.

[0003] In existing technologies, existing grinding devices require the soil and fertilizer to be crushed before grinding. However, due to the limited functionality of these devices, it is necessary to manually place the sample into the crushing device for crushing, then remove the sample from the crushing device and transfer it to the grinding device. This increases manpower and operation time, significantly reducing pretreatment efficiency. Furthermore, manual transfer can easily lead to sample loss, and exposure of the sample to air may introduce impurities, affecting the accuracy of subsequent testing. Therefore, it is necessary to develop an improved pretreatment device for soil and fertilizer nutrient testing to solve the above problems. Utility Model Content

[0004] To overcome the problems of existing grinding devices being limited in function, requiring manual labor to first crush soil and fertilizer samples before transferring them to the grinding device, which not only increases manpower and operation time, significantly reducing pretreatment efficiency, but also easily causes sample loss during manual transfer, and the potential introduction of impurities when samples are exposed to air, affecting the accuracy of subsequent testing.

[0005] The technical solution of this utility model is as follows: a soil fertilizer nutrient detection pretreatment device, including a crushing chamber, a grinding chamber fixedly connected to the bottom of the crushing chamber, a screening chamber fixedly connected to the bottom of the grinding chamber, a feed inlet fixedly connected to the top of the crushing chamber, a door panel rotatably connected to the screening chamber via a rotating component, a collection box disposed inside the screening chamber, a screening component disposed inside the screening chamber, a first crushing roller rotatably connected to the crushing chamber, a first circular gear fixedly connected to the first crushing roller, a second crushing roller rotatably connected to the crushing chamber, a second circular gear fixedly connected to the second crushing roller, a first transmission roller fixedly connected to the first crushing roller, a grinding concave wheel fixedly connected to the grinding chamber, a rotating rod rotatably connected to the grinding chamber, a second transmission roller fixedly connected to the rotating rod, a conveyor belt drivingly connected between the second transmission roller and the first transmission roller, a first bevel gear fixedly connected to the rotating rod, a second bevel gear meshing with the outside of the first bevel gear, a smooth rod fixedly connected inside the second bevel gear, and a grinding cam fixedly connected to the top of the smooth rod. The first circular gear meshes with the outside of the second circular gear, and the first crushing roller meshes with the outside of the second crushing roller.

[0006] Preferably, the screening chamber has a matching slot at the corresponding position of the collection box, and the collection box is placed in the slot of the screening chamber.

[0007] Preferably, the bottom of the crushing chamber is configured as a guide slope, and the bottom of the crushing chamber and the top of the grinding chamber are provided with matching through grooves at the guide slope position of the crushing chamber.

[0008] Preferably, a first motor is fixedly connected to the side of the grinding chamber near the first circular gear, a first grinding roller is fixedly connected to the output end of the first motor, a support rod is fixedly connected inside the grinding chamber, a protective frame is fixedly connected to the inner side of the support rod, a smooth rod is rotatably connected inside the protective frame, a rotating rod is rotatably connected inside the protective frame, a second bevel gear is located inside the protective frame, and a first bevel gear is located inside the protective frame.

[0009] Preferably, the screening assembly includes a flow guide frame fixedly connected inside the screening chamber, a screening box disposed on the flow guide frame, a support frame fixedly connected to the outside of the flow guide frame, a second motor fixedly connected to the support frame, a third bevel gear fixedly connected to the output end of the second motor, a fourth bevel gear meshing with the outside of the third bevel gear, a long rod fixedly connected inside the fourth bevel gear, a rotating disk fixedly connected to the outside of the long rod, an optical shaft fixedly connected to the outside of the rotating disk, a movable bracket rotatably connected to the optical shaft, a sliding block slidably connected inside the support frame, a mounting block fixedly connected to the bottom of the screening box, and a mounting bolt disposed inside the mounting block. The long rod is rotatably connected inside the flow guide frame and the long rod is rotatably connected inside the support frame. The end of the movable bracket away from the optical shaft is rotatably connected to the sliding block. The mounting block is disposed on the sliding block, and the mounting bolt is threadedly connected inside the sliding block.

[0010] Preferably, the flow guide frame has a matching slot at the corresponding position of the screening box, and the screening box is placed in the slot of the flow guide frame.

[0011] Preferably, the support frame has a matching groove at the corresponding position of the sliding block, and the sliding block slides inside the groove of the support frame.

[0012] Preferably, the sliding block has a matching mounting groove at the corresponding position of the mounting block, and the mounting block is set on the mounting groove of the sliding block.

[0013] The beneficial effects of this utility model are:

[0014] 1. Through the meshing of the first and second circular gears, the first and second crushing rollers are driven to rotate synchronously in opposite directions, which can pre-crush soil and fertilizer, ensuring that the materials are uniformly and effectively pre-treated. The crushed soil and fertilizer enter the grinding chamber through the guide slope at the bottom of the crushing chamber. At the same time, with the help of the transmission of the conveyor belt, the grinding cam is driven to rotate synchronously during the crushing process, so that the grinding cam cooperates with the grinding concave wheel inside the grinding chamber to further grind the pre-crushed material. This realizes the linkage between crushing and grinding processes, which greatly reduces the labor input and operation time, significantly improves the pre-treatment efficiency, and effectively avoids the introduction of impurities due to the exposure of samples to air, ensuring the purity of the samples and thus improving the accuracy of subsequent testing.

[0015] 2. The second motor drives the third and fourth bevel gears to mesh, which in turn rotates the long rod and the rotating disk. This causes the optical shaft to pull the sliding block through the movable bracket and slide within the support frame. Consequently, the screening box reciprocates on the guide frame, achieving efficient screening of materials and improving the uniformity and thoroughness of screening. At the same time, the screening box is placed on the sliding block by the mounting block at the bottom and fixed by the mounting bolts. This ensures the stability of the connection between the screening box and the sliding block and facilitates the disassembly and cleaning of the screening box, enhancing the versatility of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the soil fertilizer nutrient detection and pretreatment device of this utility model;

[0017] Figure 2 This is a cross-sectional structural diagram of the crushing chamber, grinding chamber, and grinding concave wheel of this utility model;

[0018] Figure 3 This is a schematic diagram of the grinding concave wheel and grinding cam structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the screening component structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the sliding block structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the mounting block structure of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Crushing chamber; 21. Protective frame; 22. First motor; 23. First crushing roller; 24. First circular gear; 25. Second crushing roller; 26. Second circular gear; 27. First transmission roller; 28. Grinding concave wheel; 29. ​​Rotating rod; 210. Second transmission roller; 211. Conveyor belt; 212. First bevel gear; 213. Second bevel gear; 214. Smooth rod; 215. Grinding cam; 216. Support rod; 31. Guide frame; 32. Screening box; 33. Support frame; 34. Second motor; 35. Third bevel gear; 36. Fourth bevel gear; 37. Long rod; 38. Rotating disk; 39. Smooth shaft; 310. Movable bracket; 311. Sliding block; 312. Mounting block; 313. Mounting bolt; 4. Grinding chamber; 5. Screening chamber; 6. Feed inlet; 7. Door panel; 8. Collection box. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figure 1 - Figure 6This utility model provides an embodiment: a soil fertilizer nutrient detection pretreatment device, including a crushing chamber 1, a grinding chamber 4 fixedly connected to the bottom of the crushing chamber 1, a screening chamber 5 fixedly connected to the bottom of the grinding chamber 4, a feed inlet 6 fixedly connected to the top of the crushing chamber 1, a door panel 7 rotatably connected to the screening chamber 5 via a rotating component, a collection box 8 disposed inside the screening chamber 5, a screening assembly disposed inside the screening chamber 5, a first crushing roller 23 rotatably connected inside the crushing chamber 1, a first circular gear 24 fixedly connected to the first crushing roller 23, a second crushing roller 25 rotatably connected inside the crushing chamber 1, and a second circular gear 24 fixedly connected to the second crushing roller 25. Circular gear 26, first transmission roller 27 fixedly connected to first crushing roller 23, grinding concave wheel 28 fixedly connected inside grinding chamber 4, rotating rod 29 rotatably connected inside grinding chamber 4, second transmission roller 210 fixedly connected to rotating rod 29, conveyor belt 211 drivingly connected between second transmission roller 210 and first transmission roller 27, first bevel gear 212 fixedly connected to rotating rod 29, second bevel gear 213 meshing outside first bevel gear 212, polishing rod 214 fixedly connected inside second bevel gear 213, grinding cam 215 fixedly connected to top of polishing rod 214, first circular gear 24 meshing with the first transmission roller 27, first transmission roller 28 fixedly connected to first crushing roller 23, grinding concave wheel 28 fixedly connected inside grinding chamber 4, rotating rod 29 rotatably connected inside grinding chamber 4, second transmission roller 210 fixedly connected to rotating rod 29 ... The first crushing roller 23 meshes with the outside of the second crushing roller 25 on the outside of the two circular gears 26. Through the meshing of the first circular gear 24 and the second circular gear 26, the first crushing roller 23 and the second crushing roller 25 are driven to rotate synchronously in opposite directions, which can perform preliminary crushing of soil and fertilizer, ensuring that the material is uniformly and effectively pre-treated. The crushed soil and fertilizer enter the grinding chamber 4 through the guide slope at the bottom of the crushing chamber 1. At the same time, with the help of the transmission action of the conveyor belt 211, the grinding cam 215 is driven to rotate synchronously during the crushing process, so that the grinding cam 215 cooperates with the grinding concave wheel 28 inside the grinding chamber 4 to further grind the pre-crushed material, realizing the grinding of soil and fertilizer. The linkage between crushing and grinding processes significantly reduces manpower and operation time, and significantly improves pretreatment efficiency. In addition, it effectively avoids the introduction of impurities due to sample exposure to air, ensuring sample purity and thus improving the accuracy of subsequent testing. The screening component reciprocates on the guide frame 31 via the screening box 32, achieving efficient screening of materials and improving the uniformity and thoroughness of screening. At the same time, the screening box 32 is placed on the sliding block 311 via the mounting block 312 at the bottom and fixed by the mounting bolt 313, which not only ensures the stability of the connection between the screening box 32 and the sliding block 311, but also facilitates the disassembly and cleaning of the screening box 32, enhancing the versatility of the device.

[0025] Please see Figure 2 - Figure 3In this embodiment, the screening chamber 5 has a matching groove at the corresponding position of the collection box 8. The collection box 8 is placed in the groove of the screening chamber 5. By opening a matching groove at the corresponding position of the collection box 8 in the screening chamber 5, the collection box 8 can be accurately placed in the groove, ensuring that the material can fall accurately into the collection box 8. It also facilitates the quick installation and removal of the collection box 8, reduces the trouble in the operation process, and improves the convenience and reliability of material collection. The bottom of the crushing chamber 1 is set as a guide slope, and the bottom of the crushing chamber 1 and the top of the grinding chamber 4 are on the guide slope of the crushing chamber 1. A matching through-slot is provided at the slope position. By setting the bottom of the crushing chamber 1 as a guide slope and opening a through-slot at the guide slope position that matches the top of the grinding chamber 4, the soil and fertilizer crushed by the first crushing roller 23 and the second crushing roller 25 can smoothly pass through the through-slot into the grinding chamber 4 under the guidance of gravity and the slope. This avoids the accumulation of materials at the bottom of the crushing chamber 1, ensuring that all the crushed materials can enter the next process for grinding, improving the utilization rate of materials, and also ensuring the continuity of the pretreatment process, reducing the need for manual cleaning due to material residue. In the following configuration, a first motor 22 is fixedly connected to the side of the crushing chamber 1 near the first circular gear 24, and a first crushing roller 23 is fixedly connected to the output end of the first motor 22. A support rod 216 is fixedly connected inside the grinding chamber 4, and a protective frame 21 is fixedly connected to the inner side of the support rod 216. A polishing rod 214 is rotatably connected inside the protective frame 21, and a rotating rod 29 is rotatably connected inside the protective frame 21. A second bevel gear 213 and a first bevel gear 212 are both located inside the protective frame 21. The first motor 22 is used as the... The first crushing roller 23 provides stable and continuous power, ensuring the efficient crushing process. The support rod 216 inside the grinding chamber 4 is fixedly connected to the protective frame 21, and the smooth rod 214, the rotating rod 29, and the first and second bevel gears 213 are all placed inside the protective frame 21. The protective frame 21 can effectively prevent dust and other impurities generated during the grinding process from entering the gears and rotating parts, reducing the wear of the parts and extending the service life of the equipment. At the same time, it also ensures the stability and accuracy of the transmission, ensuring that the grinding cam 215 can stably cooperate with the grinding concave wheel 28.

[0026] Please see Figure 4 - Figure 6In this embodiment, the screening assembly includes a flow guide frame 31 fixedly connected inside the screening chamber 5, a screening box 32 disposed on the flow guide frame 31, a support frame 33 fixedly connected to the outside of the flow guide frame 31, a second motor 34 fixedly connected to the support frame 33, a third bevel gear 35 fixedly connected to the output end of the second motor 34, a fourth bevel gear 36 meshing with the outside of the third bevel gear 35, a long rod 37 fixedly connected inside the fourth bevel gear 36, a rotating disk 38 fixedly connected to the outside of the long rod 37, an optical shaft 39 fixedly connected to the outside of the rotating disk 38, a movable bracket 310 rotatably connected to the optical shaft 39, a sliding block 311 slidably connected inside the support frame 33, and a mounting bracket fixedly connected to the bottom of the screening box 32. Mounting block 312, mounting bolt 313 set inside mounting block 312, long rod 37 rotatably connected inside guide frame 31, long rod 37 rotatably connected inside support frame 33, movable bracket 310 rotatably connected to sliding block 311 at one end away from optical axis 39, mounting block 312 set on sliding block 311, mounting bolt 313 threadedly connected inside sliding block 311, driven by second motor 34 to mesh third bevel gear 35 and fourth bevel gear 36, driving long rod 37 and rotating disk 38 to rotate, causing optical axis 39 to pull sliding block 311 to slide inside support frame 33 through movable bracket 310, thereby driving screening box 32 to reciprocate on guide frame 31, realizing efficient screening of materials and improving screening uniformity. To ensure uniformity and thoroughness, the screening box 32 is placed on the sliding block 311 via the mounting block 312 at the bottom and fixed by the mounting bolts 313. This ensures the stability of the connection between the screening box 32 and the sliding block 311, and facilitates the disassembly and cleaning of the screening box 32, enhancing the versatility of the device. The guide frame 31 has a matching groove at the corresponding position of the screening box 32. The screening box 32 is placed in the groove of the guide frame 31. The matching groove at the corresponding position of the screening box 32 by the guide frame 31 allows the screening box 32 to be stably placed in the groove. When the screening box 32 reciprocates, the groove guides and limits the screening box 32, preventing the screening box 32 from shifting or shaking during the movement, thus ensuring the stability of the screening process. This also ensures that the material entering the screening chamber 5 from the grinding chamber 4 can accurately fall into the screening box 32, improving screening efficiency and accuracy. The support frame 33 has a matching groove at the corresponding position of the sliding block 311. The sliding block 311 slides inside the groove of the support frame 33. By opening a matching groove at the corresponding position of the sliding block 311, the support frame 33 can make the sliding block 311 slide stably along the groove. The groove provides precise guidance for the movement of the sliding block 311, avoiding jamming or deviation during the movement of the sliding block 311, ensuring the smooth movement of the sliding block 311 driven by the movable bracket 310, thereby ensuring the stability of the reciprocating motion of the screening box 32 and improving the working reliability of the screening component.The sliding block 311 has a corresponding mounting groove on the mounting block 312. The mounting block 312 is placed on the mounting groove of the sliding block 311. By having a corresponding mounting groove on the mounting block 312, the mounting block 312 can be accurately placed within the mounting groove, enhancing the tightness and stability of the connection between the mounting block 312 and the sliding block 311. When the screening box 32 moves with the sliding block 311, it effectively prevents relative displacement between the mounting block 312 and the sliding block 311, ensuring the synchronicity of the screening box 32's movement. It also provides a stable foundation for the fixing of the mounting bolts 313, further improving the firmness of the screening box 32's installation.

[0027] In operation, soil and fertilizer are first fed into the crushing chamber 1 through the feed inlet 6. After the first motor 22 starts, it drives the first crushing roller 23 to rotate. Since the first circular gear 24 meshes with the second circular gear 26, the first crushing roller 23 drives the second crushing roller 25 to rotate synchronously in the opposite direction. The two work together to initially crush the input material. Guided by the guide ramp at the bottom of the crushing chamber 1, the crushed material enters the grinding chamber 4 through the channel between the crushing chamber 1 and the grinding chamber 4. Simultaneously, the rotation of the first crushing roller 23 drives the first transmission roller 27 to rotate. The first transmission roller 27 drives the second transmission roller 210 and the rotating rod 29 to rotate via the conveyor belt 211. The first bevel gear 212 and the second bevel gear 213 on the rotating rod 29 mesh, thereby driving the polished rod 214 and the grinding cam 215 to rotate. This causes the grinding cam 215 to engage with the grinding concave wheel 28 inside the grinding chamber 4, further grinding the material entering the grinding chamber 4. After the material enters the screening chamber 5 and falls into the screening box 32, the second motor 34 starts. The third bevel gear 35 at its output end drives the fourth bevel gear 36 and the long rod 37 to rotate. The long rod 37 drives the rotating disk 38 to rotate. The optical shaft 39 on the rotating disk 38 pulls the sliding block 311 through the movable bracket 310 to slide back and forth in the slide groove of the support frame 33. The sliding block 311 is then driven by the mounting block 312 installed at the top by the mounting bolt 313, which in turn drives the screening box 32 to move back and forth in the groove of the guide frame 31 to screen the material. After screening, the material that meets the requirements passes through the screening box 32 and falls into the collection box 8 below. The collection box 8 is placed in the groove at the corresponding position of the screening chamber 5. After the pretreatment is completed, the collection box 8 can be pulled out from the inside of the screening chamber 5 to get the processed material. The door panel 7 on the screening chamber 5 can be opened by the rotating part to facilitate the disassembly of the screening box 32 for cleaning.

[0028] Through the above steps, the meshing transmission of the first circular gear 24 and the second circular gear 26 drives the first crushing roller 23 and the second crushing roller 25 to rotate synchronously in opposite directions, realizing the initial crushing of soil and fertilizer, ensuring uniform crushing of materials. The crushed material automatically falls into the grinding chamber 4 through the guide slope at the bottom of the crushing chamber 1. At the same time, the power of the first crushing roller 23 is transmitted to the grinding cam 215 by the conveyor belt 211, so that it cooperates with the grinding concave wheel 28 to complete the secondary grinding. This realizes the linkage design of crushing and grinding processes, reduces manpower input and operation time, improves pretreatment efficiency, avoids sample contact with air, reduces the introduction of impurities, and provides a more reliable sample basis for subsequent testing. This solves the problem that existing grinding devices have a single function, requiring manual crushing of soil and fertilizer samples before transfer to the grinding device. This not only increases manpower input and operation time and significantly reduces pretreatment efficiency, but also easily causes sample loss during manual transfer. Furthermore, sample exposure to air may introduce impurities, affecting the accuracy of subsequent testing.

Claims

1. A soil fertilizer nutrient detection pretreatment device, comprising a crushing chamber (1), characterized in that: It also includes a grinding chamber (4) fixedly connected to the bottom of the grinding chamber (1), a screening chamber (5) fixedly connected to the bottom of the grinding chamber (4), a feed inlet (6) fixedly connected to the top of the grinding chamber (1), a door panel (7) rotatably connected to the screening chamber (5) via a rotating component, a collection box (8) set inside the screening chamber (5), a screening assembly set inside the screening chamber (5), a first grinding roller (23) rotatably connected to the inside of the grinding chamber (1), a first circular gear (24) fixedly connected to the first grinding roller (23), a second grinding roller (25) rotatably connected to the inside of the grinding chamber (1), a second circular gear (26) fixedly connected to the second grinding roller (25), a first drive roller (27) fixedly connected to the first grinding roller (23), and a door panel (7) rotatably connected to the screening chamber (5) via a rotating component, a collection box (8) set inside the screening chamber (5), a screening assembly set inside the screening chamber (5), a first grinding roller (23) rotatably connected to the inside of the grinding chamber (1), a second circular gear (26) fixedly connected to the second grinding roller (25), a first drive roller (27) fixedly connected to the first grinding roller (23), and a door panel (7) rotatably connected to the screen. The grinding chamber (4) contains a grinding concave wheel (28), a rotating rod (29) rotatably connected inside the grinding chamber (4), a second transmission roller (210) fixedly connected to the rotating rod (29), a conveyor belt (211) connecting the second transmission roller (210) and the first transmission roller (27), a first bevel gear (212) fixedly connected to the rotating rod (29), a second bevel gear (213) meshing with the outside of the first bevel gear (212), a polishing rod (214) fixedly connected inside the second bevel gear (213), a grinding cam (215) fixedly connected to the top of the polishing rod (214), a first circular gear (24) meshing with the outside of the second circular gear (26), and a first crushing roller (23) meshing with the outside of the second crushing roller (25).

2. The soil fertilizer nutrient detection pretreatment device according to claim 1, characterized in that: The screening chamber (5) has a matching slot at the corresponding position of the collection box (8), and the collection box (8) is set in the slot of the screening chamber (5).

3. The soil fertilizer nutrient detection pretreatment device according to claim 1, characterized in that: The bottom of the crushing chamber (1) is set as a guide slope, and the bottom of the crushing chamber (1) and the top of the grinding chamber (4) are provided with matching through grooves at the guide slope position of the crushing chamber (1).

4. The soil fertilizer nutrient detection pretreatment device according to claim 1, characterized in that: The first motor (22) is fixedly connected to the side of the crushing chamber (1) near the first circular gear (24). The first crushing roller (23) is fixedly connected to the output end of the first motor (22). The support rod (216) is fixedly connected inside the grinding chamber (4). The protective frame (21) is fixedly connected to the inside of the support rod (216). The smooth rod (214) is rotatably connected inside the protective frame (21). The rotating rod (29) is rotatably connected inside the protective frame (21). The second bevel gear (213) is set inside the protective frame (21). The first bevel gear (212) is set inside the protective frame (21).

5. The soil fertilizer nutrient detection pretreatment device according to claim 1, characterized in that: The screening assembly includes a flow guide (31) fixedly connected inside the screening chamber (5), a screening box (32) set on the flow guide (31), a support frame (33) fixedly connected to the outside of the flow guide (31), a second motor (34) fixedly connected to the support frame (33), a third bevel gear (35) fixedly connected to the output end of the second motor (34), a fourth bevel gear (36) meshing with the outside of the third bevel gear (35), a long rod (37) fixedly connected inside the fourth bevel gear (36), a rotating disk (38) fixedly connected to the outside of the long rod (37), and an optical shaft (39) fixedly connected to the outside of the rotating disk (38). The movable bracket (310) is movably connected to the optical axis (39), the sliding block (311) is slidably connected inside the support frame (33), the mounting block (312) is fixedly connected to the bottom of the screening box (32), and the mounting bolt (313) is set inside the mounting block (312). The long rod (37) is rotatably connected to the inside of the guide frame (31), the long rod (37) is rotatably connected to the inside of the support frame (33), the end of the movable bracket (310) away from the optical axis (39) is rotatably connected to the sliding block (311), the mounting block (312) is set on the sliding block (311), and the mounting bolt (313) is threadedly connected inside the sliding block (311).

6. The soil fertilizer nutrient detection pretreatment device according to claim 5, characterized in that: The flow guide (31) has a matching slot at the corresponding position of the screening box (32), and the screening box (32) is set in the slot of the flow guide (31).

7. The soil fertilizer nutrient detection pretreatment device according to claim 5, characterized in that: The support frame (33) has a matching groove at the corresponding position of the sliding block (311), and the sliding block (311) slides inside the groove of the support frame (33).

8. The soil fertilizer nutrient detection pretreatment device according to claim 5, characterized in that: The sliding block (311) has a matching mounting groove at the corresponding position of the mounting block (312), and the mounting block (312) is set on the mounting groove of the sliding block (311).

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