Agricultural planting fertilizer device

Abstract

This utility model discloses a fertilization device for agricultural planting, including a backing plate. A fertilization mechanism is mounted on the backing plate, comprising an air pump, a storage tank, an output pipe, a corrugated pipe, a jet pipe, a connecting pipe, and an atomizing nozzle. An adjustment mechanism is provided between the output pipe and the connecting pipe. The adjustment mechanism includes a connecting sleeve, an adjusting sleeve, a connecting ring, a connecting plate, a baffle, a slider, a sliding groove, a threaded groove, and a mating sleeve. The beneficial effect of the adjustment mechanism is that it can flexibly adjust the flow rate and velocity of the liquid fertilizer. By rotating the adjusting sleeve, the threaded engagement between the threaded groove and the mating sleeve causes the adjusting sleeve to drive the connecting ring and the connecting plate, thereby changing the moving position of the baffle and adjusting the gap of the liquid flow. This process can precisely control the spraying amount of liquid fertilizer, avoiding fertilizer waste or insufficiency, thus optimizing fertilizer utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of agricultural planting technology, and more specifically, it relates to a fertilization device for agricultural planting. Background Technology

[0002] With the continuous expansion of agricultural production, the application of liquid fertilizer has become an important means to improve crop yield and quality. However, in the existing fertilization equipment, the spraying range of liquid fertilizer is often relatively limited, which cannot meet the fertilization needs of large-scale farmland. Especially in vast fields, traditional spraying equipment often cannot achieve uniform fertilizer distribution due to the limitations of spraying angle and coverage, thus affecting the fertilization effect. In order to improve the efficiency and application quality of liquid fertilizer, there is an urgent need for a fertilization device that can cover a larger area to meet the needs of farmland of different sizes. In addition, the amount of liquid fertilizer applied is crucial for crop growth, but most existing fertilization devices cannot accurately adjust the amount of liquid fertilizer sprayed, resulting in fertilizer waste or insufficient application. The spraying amount of some devices cannot be flexibly adjusted according to the needs of different crops, resulting in uneconomical and inefficient use of fertilizer, and may even have a negative impact on the soil environment. Utility Model Content

[0003] (a) Technical problems to be solved In view of the problems existing in the prior art, this utility model provides a fertilizer application device for agricultural planting to solve the technical problems mentioned in the background art.

[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an agricultural fertilization device, comprising a support plate, on which a fertilization mechanism is mounted. The fertilization mechanism includes an air pump, a storage tank, an output pipe, a corrugated pipe, a jet pipe, a connecting pipe, and an atomizing nozzle. The air pump is fixed to the outside of the support plate, the storage tank is installed at the top of the air pump, the output pipe is connected to the outer wall of the storage tank, the corrugated pipe is connected to the output end of the air pump, the jet pipe is connected to the outer end of the corrugated pipe, the connecting pipe is fixed to the jet pipe, and the atomizing nozzle is disposed inside the jet pipe and connected to the connecting pipe. The output pipe and the connecting pipe are connected... An adjustment mechanism is provided, comprising a connecting sleeve, an adjusting sleeve, a connecting ring, a connecting plate, a baffle, a slider, a sliding groove, a threaded groove, and a mating sleeve. The connecting sleeve is fixed to the top of the connecting pipe, the adjusting sleeve moves within the connecting sleeve, the connecting ring rotates within the adjusting sleeve, multiple sets of connecting plates are fixed to the inner wall of the connecting ring, multiple baffles are fixed to the bottom of multiple sets of connecting plates, multiple sliders are fixed to the outer wall of multiple sets of baffles, multiple sets of sliding grooves are distributed on the inner wall of the connecting sleeve and slide in connection with multiple sets of sliders, the threaded groove is located within the adjusting sleeve, and the mating sleeve is fixed within the connecting sleeve and threadedly connected to the threaded groove.

[0005] The present invention is further provided with a strap on the inner side of the backing plate, and two sets of straps are provided to better fix and support the spraying device, thereby improving the stability and safety of the equipment.

[0006] The present invention is further configured such that a handle is installed on the outer wall of the jet pipe, and a water pump is connected between the output pipe and the storage tank, which facilitates the operator to flexibly adjust the working status of the water pump during the fertilization process and enhances the ease of operation of the equipment.

[0007] The present invention is further provided with a connecting shaft between the top of the adjusting sleeve and the output pipe to ensure the stability and flexibility of the adjustment process and facilitate precise control of the liquid flow rate.

[0008] The present invention is further configured such that all of the multiple sets of connecting plates are flexible plates, and a limiting rod is fixedly provided inside the connecting sleeve. The limiting rod is provided in multiple sets and is slidably connected to the connecting ring, which improves the adaptability and stability of the connecting plates and ensures that the functionality of the device can be effectively maintained under different fertilization conditions.

[0009] The present invention is further configured such that guide blocks are fixedly provided on the outer walls of the multiple sets of sliders, and guide grooves are provided on the inner sides of the multiple sets of slide grooves. The multiple sets of guide blocks slide in the multiple sets of guide grooves respectively, which enhances the stability and accuracy of the adjustment process and ensures that the flow rate adjustment of liquid fertilizer is not affected by external interference.

[0010] This utility model is further configured such that a limiting mechanism is provided on the outer side of the connecting sleeve. The limiting mechanism includes a positioning block, a positioning groove, a return spring, a limiting sleeve, a support rod, an abutment block, a rotating sleeve, an abutment plate, and an unlocking hole. The positioning block has multiple sets that slide on the outer wall of the connecting sleeve, and the positioning groove has multiple sets that are distributed on the outer wall of the adjusting sleeve. The return spring is connected to the top of the multiple sets of positioning blocks and its bottom end is fixedly connected to the outer wall of the connecting sleeve. The limiting sleeve slides on the outer wall of the connecting sleeve, and the support rod has multiple sets that are fixed to the bottom surface of the limiting sleeve. The abutment block is fixed to the bottom end of the multiple sets of support rods, the rotating sleeve rotates on the outer wall of the fixed sleeve, the abutment plate is fixed to the top surface of the rotating sleeve, and the unlocking hole has multiple sets that are distributed on the outer wall of the limiting plate. This provides a more precise adjustment range, prevents over-adjustment or loss of control during the adjustment process, and ensures the safety and stability of the fertilization operation.

[0011] The present invention is further configured such that: a mounting block is fixedly provided on the bottom surface of the rotating sleeve; multiple sets of mounting blocks are provided, each with an arc-shaped rod fixedly provided on its outer side; compression springs are provided on the outer side of each set of arc-shaped rods; the multiple sets of compression springs are respectively fixedly connected to the multiple sets of mounting blocks; and compression plates are fixedly provided on the outer wall of the connecting sleeve; multiple sets of compression plates are provided and are respectively slidably connected to the multiple sets of arc-shaped rods; one end of each set of compression springs abuts against the multiple sets of compression plates. This enhances the equipment's ability to distribute force during adjustment, making the adjustment process more stable and avoiding possible excessive resistance or imbalance.

[0012] (III) Beneficial Effects Compared with the prior art, this utility model provides a fertilizer application device for agricultural planting, which has the following beneficial effects: 1. The beneficial effect of the fertilization mechanism is that it can ensure that liquid fertilizer can be delivered from the storage tank to the jet pipe through the output pipe through the synergistic action of the air pump and water pump, and then sprayed efficiently through the atomizing nozzle. The air pump provides airflow to spread the atomized liquid fertilizer, which improves the uniformity and coverage of fertilizer spraying. This design can not only improve fertilization efficiency, but also achieve precision fertilization in large areas of farmland, thereby better meeting the needs of different crops and improving the efficiency of agricultural production.

[0013] 2. The beneficial effect of the adjustment mechanism is that it can flexibly adjust the flow rate and velocity of liquid fertilizer. By rotating the adjustment sleeve, the threaded groove and the threaded engagement of the mating sleeve cause the adjustment sleeve to drive the connecting ring and the connecting plate, thereby changing the moving position of the baffle and adjusting the gap of liquid flow. This process can accurately control the amount of liquid fertilizer sprayed, avoiding fertilizer waste or insufficient application, thus optimizing fertilizer use efficiency. At the same time, the sliding design of the slider and the chute ensures the smoothness and flexibility of the adjustment process, and can adapt to the needs of different agricultural production conditions.

[0014] 3. The beneficial effect of the limiting mechanism is that, through precise limiting design, it ensures that the adjusting mechanism can work stably during fertilization, avoiding over-adjustment or inaccuracy. The limiting sleeve, through structures such as positioning blocks, positioning grooves, and return springs, ensures the precise positioning of the adjusting sleeve, allowing the spraying volume of liquid fertilizer to be precisely adjusted within a certain range. The setting of the limiting mechanism effectively prevents possible loss of control during adjustment, ensuring the safety and stability of fertilization operation. In addition, when no further adjustment is needed, the limiting mechanism can also ensure that the entire fertilization system is in a fixed state after fertilization through the action of the compression spring and the arc rod, which helps to improve the durability and service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an agricultural fertilization device according to the present invention. Figure 2 This is a schematic diagram of the atomizing nozzle in this utility model; Figure 3 This is a schematic diagram of the structure of the adjusting sleeve and the connecting sleeve in this utility model; Figure 4 This is a cross-sectional view of the connecting sleeve in this utility model; Figure 5 This is a cross-sectional view of the adjusting sleeve in this utility model.

[0016] In the diagram: 1. Backing plate; 2. Air pump; 3. Storage tank; 4. Output pipe; 5. Corrugated pipe; 6. Jet pipe; 7. Connecting pipe; 8. Atomizing nozzle; 9. Connecting sleeve; 10. Adjusting sleeve; 11. Connecting ring; 12. Connecting plate; 13. Baffle; 14. Slider; 15. Slide groove; 16. Threaded groove; 17. Mating sleeve; 18. Strap; 19. Handle; 20. Water pump; 21. Connecting shaft; 22. Limiting rod; 23. Guide block; 24. Guide groove; 25. Positioning block; 26. Positioning groove; 27. Return spring; 28. Limiting sleeve; 29. ​​Support rod; 30. Abutment block; 31. Rotating sleeve; 32. Abutment plate; 33. Unlocking hole; 34. Mounting block; 35. Arc rod; 36. Compression spring; 37. Compression plate. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0019] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0020] Please see Figures 1-5A fertilization device for agricultural planting includes a support plate 1, on which a fertilization mechanism is mounted. The fertilization mechanism includes an air pump 2, a storage tank 3, an output pipe 4, a corrugated pipe 5, a jet pipe 6, a connecting pipe 7, and an atomizing nozzle 8. The air pump 2 is fixed to the outside of the support plate 1, the storage tank 3 is mounted on the top of the air pump 2, the output pipe 4 is connected to the outer wall of the storage tank 3, the corrugated pipe 5 is connected to the output end of the air pump 2, the jet pipe 6 is connected to the outer end of the corrugated pipe 5, the connecting pipe 7 is fixed to the jet pipe 6, the atomizing nozzle 8 is disposed inside the jet pipe 6 and connected to the connecting pipe 7, and an adjustment mechanism is provided between the output pipe 4 and the connecting pipe 7. The adjustment mechanism includes a connecting sleeve 9 and an adjusting sleeve 10. The system includes a connecting ring 11, a connecting plate 12, a baffle 13, a slider 14, a sliding groove 15, a threaded groove 16, and a mating sleeve 17. The connecting sleeve 9 is fixed to the top of the connecting pipe 7, the adjusting sleeve 10 is movable inside the connecting sleeve 9, the connecting ring 11 rotates inside the adjusting sleeve 10, the connecting plate 12 is provided with multiple sets fixed to the inner wall of the connecting ring 11, the baffle 13 is fixed to the bottom of multiple sets of connecting plates 12, the slider 14 is fixed to the outer wall of multiple sets of baffles 13, the sliding groove 15 is provided with multiple sets distributed on the inner wall of the connecting sleeve 9 and slidably connected to multiple sets of sliders 14, the threaded groove 16 is provided inside the adjusting sleeve 10, and the mating sleeve 17 is fixed inside the connecting sleeve 9 and threadedly connected to the threaded groove 16.

[0021] The inner side of the backrest 1 is provided with a strap 18, which is provided in two sets to fix the device to the back of the human body, thereby enhancing the stability and comfort of wearing.

[0022] A handle 19 is installed on the outer wall of the jet pipe 6, and a water pump 20 is connected between the output pipe 4 and the storage tank 3, which makes it easy for the operator to lift and move the pipe, and the water pump 20 can stably transport the liquid in the storage tank 3 to the output pipe 4.

[0023] A connecting shaft 21 is provided between the top of the adjusting sleeve 10 and the output pipe 4. The adjusting sleeve 10 and the output pipe 4 can be rotated or their angles adjusted through the connecting shaft 21, thereby improving the flexibility of operation and the ability to control liquid flow.

[0024] Multiple sets of connecting plates 12 are all set as flexible plates. A limiting rod 22 is fixedly provided inside the connecting sleeve 9. There are multiple sets of limiting rods 22, all of which are slidably connected to the connecting ring 11. The flexible connection enables the structure to bend to adapt to various working scenarios. The sliding cooperation between the limiting rod 22 and the connecting ring 11 ensures the connection stability and adjustment stroke limit.

[0025] Guide blocks 23 are fixedly provided on the outer wall of multiple sets of sliders 14, and guide grooves 24 are provided on the inner side of multiple sets of slide grooves 15. Multiple sets of guide blocks 23 slide in multiple sets of guide grooves 24 respectively. The cooperation between guide blocks 23 and guide grooves 24 makes sliders 14 slide smoothly and prevents the device from jamming or deviating during movement or adjustment.

[0026] A limiting mechanism is provided on the outer side of the connecting sleeve 9. The limiting mechanism includes a positioning block 25, a positioning groove 26, a return spring 27, a limiting sleeve 28, a support rod 29, an abutment block 30, a rotating sleeve 31, an abutment plate 32, and an unlocking hole 33. The positioning block 25 has multiple sets that slide on the outer wall of the connecting sleeve 9. The positioning groove 26 has multiple sets that are distributed on the outer wall of the adjusting sleeve 10. The return spring 27 is connected to the top of the multiple sets of positioning blocks 25 and its bottom end is fixedly connected to the outer wall of the connecting sleeve 9. The limiting sleeve 28 slides on the outer wall of the connecting sleeve 9. The support rod 29 has multiple sets that are fixed to the bottom surface of the limiting sleeve 28. The abutment block 30 is fixed to the bottom end of the multiple sets of support rods 29. The rotating sleeve 31 rotates on the outer wall of the fixed sleeve. The abutment plate 32 is fixed to the top surface of the rotating sleeve 31. The unlocking hole 33 has multiple sets that are distributed on the outer wall of the limiting plate. This limiting mechanism realizes the linkage control of positioning, limiting, and unlocking through a multi-level structure, which improves the safety and accuracy of the adjustment process.

[0027] The bottom surface of the rotating sleeve 31 is fixedly provided with mounting blocks 34. Multiple sets of mounting blocks 34 are provided, and each set of arc-shaped rods 35 is fixedly provided on the outer side. Each set of arc-shaped rods 35 is provided with compression springs 36 on the outer side. The multiple sets of compression springs 36 are fixedly connected to the multiple sets of mounting blocks 34. The outer wall of the connecting sleeve 9 is fixedly provided with compression plates 37. Multiple sets of compression plates 37 are provided and are slidably connected to the multiple sets of arc-shaped rods 35. One end of each set of compression springs 36 abuts against the multiple sets of compression plates 37. With the help of the elastic force of the compression springs 36, the arc-shaped rods 35 are flexibly deformed when pushed by the compression plates 37, which plays a role in resetting and ensuring the stability and smoothness of the structure during adjustment or locking.

[0028] In this embodiment, during use, the user carries the backrest 1 on their back using the strap 18, injects liquid fertilizer into the storage tank 3, and uses the water pump 20 to extract and transport the liquid fertilizer into the output pipe 4. The fertilizer then flows into the connecting pipe 7 and is sprayed through the atomizing nozzle 8. The air pump 2 injects airflow into the jet pipe 6 to diffuse the atomized liquid fertilizer. When the spray volume of the liquid fertilizer needs to be adjusted, the adjusting sleeve 10 is rotated so that the threaded groove 16 engages with the mating sleeve 17, thereby causing the adjusting sleeve 10 to drive the connecting ring 11. The multiple sets of connecting plates 12 drive the baffles 13 to move. The multiple sets of baffles 13 slide along the slide groove 15 via the slider 14, thereby changing the liquid flow gap between the multiple sets of baffles 13, thereby adjusting the flow rate and flow of the liquid fertilizer. Then, the limiting sleeve 28 is pushed to abut against the top of the multiple sets of positioning blocks 25, so that its bottom end is locked in the positioning groove 26 to limit the adjustment sleeve 10. At this time, the multiple sets of abutting blocks 30 abut against the top of the abutting plate 32 to support the limiting sleeve 28. The multiple sets of compression springs 36 push the mounting block 34 to limit the rotating sleeve 31.

[0029] More specifically, when adjustment is required again, the rotating sleeve 31 is rotated, causing multiple sets of mounting blocks 34 to rotate. The multiple sets of mounting blocks 34 push the arc-shaped rod 35 to slide along multiple sets of extrusion plates 37 and compress the extrusion spring 36. At the same time, the rotating sleeve 31 causes the abutment plate 32 to rotate, causing multiple sets of unlocking holes 33 to move to the bottom surface of the abutment block 30, releasing the abutment of the multiple sets of abutment blocks 30 against the abutment plate 32, thereby releasing the support of the limiting sleeve 28. The limiting sleeve 28 is pushed to release the abutment of the multiple sets of positioning blocks 25. The multiple sets of reset springs 27 pull the positioning blocks 25 so that their bottom ends are disengaged from the positioning groove 26, releasing the limitation on the adjusting sleeve 10.

[0030] In summary, during use or operation of the entire equipment: When in use, the user carries the backrest 1 using the strap 18, injects liquid fertilizer into the storage tank 3, and the water pump 20 draws the liquid fertilizer and delivers it to the output pipe 4. The fertilizer then flows into the connecting pipe 7 and is sprayed through the atomizing nozzle 8. The air pump 2 injects airflow into the jet pipe 6 to diffuse the atomized liquid fertilizer. When it is necessary to adjust the spray volume of the liquid fertilizer, rotating the adjusting sleeve 10 causes the threaded groove 16 to engage with the mating sleeve 17, thereby causing the adjusting sleeve 10 to move... The connecting ring 11 drives the baffle 13 to move through multiple sets of connecting plates 12. The multiple sets of baffles 13 slide along the slide groove 15 through the slider 14, thereby changing the liquid flow gap between the multiple sets of baffles 13, thereby adjusting the flow rate and flow of the liquid fertilizer. Then, the limiting sleeve 28 is pushed to abut against the top of the multiple sets of positioning blocks 25, so that its bottom end is locked in the positioning groove 26 to limit the adjustment sleeve 10. At this time, the multiple sets of abutting blocks 30 abut against the top of the abutting plate 32 to support the limiting sleeve 28. The multiple sets of compression springs 36 push the mounting block 34 to limit the rotating sleeve 31.

[0031] When adjustment is required again, the rotating sleeve 31 is rotated, which drives the multiple sets of mounting blocks 34 to rotate. The multiple sets of mounting blocks 34 push the arc-shaped rod 35 to slide along the multiple sets of extrusion plates 37 and compress the extrusion spring 36. At the same time, the rotating sleeve 31 drives the abutment plate 32 to rotate, causing the multiple sets of unlocking holes 33 to move to the bottom surface of the abutment block 30, releasing the abutment of the multiple sets of abutment blocks 30 against the abutment plate 32, thereby releasing the support of the limiting sleeve 28. The limiting sleeve 28 is pushed to release the abutment of the multiple sets of positioning blocks 25. The multiple sets of reset springs 27 pull the positioning block 25 so that its bottom end is disengaged from the positioning groove 26, releasing the limitation on the adjusting sleeve 10.

[0032] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fertilizer application device for agricultural planting, comprising a backrest (1), characterized in that: A fertilization mechanism is provided on the back plate (1). The fertilization mechanism includes an air pump (2), a storage tank (3), an output pipe (4), a corrugated pipe (5), a jet pipe (6), a connecting pipe (7), and an atomizing nozzle (8). The air pump (2) is fixed on the outside of the back plate (1). The storage tank (3) is installed on the top of the air pump (2). The output pipe (4) is connected to the outer wall of the storage tank (3). The corrugated pipe (5) is connected to the output end of the air pump (2). The jet pipe (6) is connected to the outer end of the corrugated pipe (5). The connecting pipe (7) is fixed on the jet pipe (6). The atomizing nozzle (8) is set inside the jet pipe (6) and connected to the connecting pipe (7). An adjustment mechanism is provided between the output pipe (4) and the connecting pipe (7). The adjustment mechanism includes a connecting sleeve (9), an adjusting sleeve (10), and a connecting ring (11). The system includes a connecting plate (12), a baffle (13), a slider (14), a groove (15), a threaded groove (16), and a mating sleeve (17). The connecting sleeve (9) is fixed at the top of the connecting pipe (7). The adjusting sleeve (10) moves within the connecting sleeve (9). The connecting ring (11) rotates within the adjusting sleeve (10). The connecting plate (12) is provided with multiple sets of components fixed to the inner wall of the connecting ring (11). The baffle (13) is fixed to the bottom of multiple sets of connecting plates (12). The slider (14) is fixed to the outer wall of multiple sets of baffles (13). The groove (15) is provided with multiple sets distributed on the inner wall of the connecting sleeve (9) and slidably connected to multiple sets of sliders (14). The threaded groove (16) is located inside the adjusting sleeve (10). The mating sleeve (17) is fixed inside the connecting sleeve (9) and threadedly connected to the threaded groove (16).

2. The fertilizer applicator for agricultural planting according to claim 1, characterized in that: The inner side of the backrest (1) is provided with a strap (18), and the strap (18) is provided in two sets.

3. The fertilizer applicator for agricultural planting according to claim 2, characterized in that: A handle (19) is installed on the outer wall of the jet pipe (6), and a water pump (20) is connected between the output pipe (4) and the storage tank (3).

4. The fertilizer applicator for agricultural planting according to claim 3, characterized in that: A connecting shaft (21) is provided between the top of the adjusting sleeve (10) and the output tube (4).

5. The agricultural fertilization device according to claim 4, characterized in that: multiple sets The connecting plates (12) are all made of flexible plates. The connecting sleeve (9) is fixedly provided with a limiting rod (22). The limiting rod (22) is provided in multiple sets and is slidably connected to the connecting ring (11).

6. The agricultural fertilization device according to claim 5, characterized in that: multiple sets The outer wall of the slider (14) is fixed with guide blocks (23), and the inner side of the multiple sets of slide grooves (15) is provided with guide grooves (24). The multiple sets of guide blocks (23) slide in the multiple sets of guide grooves (24).

7. The fertilizer applicator for agricultural planting according to claim 6, characterized in that: The connecting sleeve (9) is provided with a limiting mechanism on its outer side. The limiting mechanism includes a positioning block (25), a positioning groove (26), a return spring (27), a limiting sleeve (28), a support rod (29), an abutment block (30), a rotating sleeve (31), an abutment plate (32), and an unlocking hole (33). The positioning block (25) is provided with multiple sets that slide on the outer wall of the connecting sleeve (9). The positioning groove (26) is provided with multiple sets that are distributed on the outer wall of the adjusting sleeve (10). The return spring (27) is provided with multiple sets that slide on the outer wall of the connecting sleeve (9). The top and bottom of the multiple positioning blocks (25) are connected to the outer wall of the connecting sleeve (9), the limiting sleeve (28) slides on the outer wall of the connecting sleeve (9), the support rod (29) is provided with multiple sets fixed on the bottom surface of the limiting sleeve (28), the abutting block (30) is fixed on the bottom of the multiple sets of support rods (29), the rotating sleeve (31) rotates on the outer wall of the fixed sleeve, the abutting plate (32) is fixed on the top surface of the rotating sleeve (31), and the unlocking hole (33) is provided with multiple sets distributed on the outer wall of the limiting plate.

8. The fertilization device for agricultural planting according to claim 7, characterized in that: The bottom surface of the rotating sleeve (31) is fixedly provided with an installation block (34). The installation block (34) is provided with multiple sets, and each set is fixedly provided with an arc-shaped rod (35). Each set of arc-shaped rods (35) is provided with a compression spring (36) on its outer side. Each set of compression springs (36) is fixedly connected to the multiple sets of installation blocks (34). The outer wall of the connecting sleeve (9) is fixedly provided with a compression plate (37). Each set of compression plates (37) is provided with multiple sets and is slidably connected to the multiple sets of arc-shaped rods (35). One end of each set of compression springs (36) abuts against the multiple sets of compression plates (37).

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