An automatic liquid fertilizer injection device for a seeding machine

Abstract

This application relates to the field of agricultural machinery technology and discloses an automatic liquid fertilizer spraying device for a seeder. It includes a first base plate, with a cylinder fixedly connected to its upper surface. A first connecting pipe is fixedly connected to the output end of the cylinder. One end of the first connecting pipe is fixedly connected to the inside of a protective plate. A three-way pipe is disposed inside the protective plate, and a fixing column is fixedly connected to one side of the outer wall of the three-way pipe. One end of the fixing column is rotatably connected to the inside of the protective plate. A second connecting pipe is fixedly connected to the inside of the protective plate. A first fixing ring is fixedly connected to the lower surface of the cylinder, and a base is fixedly connected to the upper surface of the first fixing ring. Through the design combining a cylinder and a hydraulic rod, precise adjustment of the spraying mechanism's height and angle is achieved. This mechanism can achieve localized fertilization according to different stages of crop growth and terrain undulations, thereby reducing fertilizer drift and loss and improving fertilizer utilization.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to an automatic liquid fertilizer spraying device for a seeder. Background Technology

[0002] In the context of agricultural mechanization, a seeder is a machine used to sow crop seeds in farmland. With the development of modern agricultural technology, the functions of seeders have become increasingly diversified, including precision sowing, soil preparation, fertilization, and mulching. To improve planting efficiency and crop yield, the precise application of liquid fertilizer near the seed or root zone during sowing to promote seed growth is an important technological direction in modern precision agriculture. An automatic liquid fertilizer spraying device is an add-on that can be installed on a seeder. Its purpose is to automatically apply liquid fertilizer during the sowing process. The core component of the automatic liquid fertilizer spraying device can automatically adjust the spray volume based on parameters such as the seeder's travel speed, soil conditions, and crop needs, ensuring that each seed receives the appropriate amount of fertilizer. Such precision fertilization can reduce fertilizer waste, mitigate environmental pollution, and simultaneously improve fertilizer utilization and crop yield.

[0003] Existing devices lack sufficient precision to ensure that liquid fertilizer is evenly and accurately distributed to each seed or plant. The nozzles or spraying systems may experience uneven spraying or complete cessation of spraying due to liquid fertilizer sedimentation or impurities clogging the system. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an automatic liquid fertilizer spraying device for seeders, which solves the problems of insufficient precision control to ensure that liquid fertilizer is evenly and accurately distributed to each seed or plant, and the possibility that nozzles or spraying systems may become clogged due to liquid fertilizer sedimentation or impurities, leading to uneven spraying or complete cessation of spraying.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic liquid fertilizer spraying device for a seeder, comprising a first base plate, a cylinder fixedly connected to the upper surface of the first base plate, a first connecting pipe fixedly connected to the output end of the cylinder, one end of the first connecting pipe fixedly connected to the inside of a protective plate, a three-way pipe provided inside the protective plate, a fixing column fixedly connected to one side of the outer wall of the three-way pipe, one end of the fixing column rotatably connected to the inside of the protective plate, a second connecting pipe fixedly connected to the inside of the protective plate, a first fixing ring fixedly connected to the lower surface of the cylinder, a base fixedly connected to the upper surface of the first fixing ring, a first hydraulic rod rotatably connected to the inside of the base, a connecting rod fixedly connected to the output end of the first hydraulic rod, one end of the connecting rod fixedly connected to the other end of the three-way pipe, a side plate fixedly connected to one side of the outer wall of the protective plate, the connecting rod penetrating into the inside of the side plate, an L-shaped pipe fixedly connected to the inside of the protective plate, and a spraying mechanism fixedly connected to one end of the L-shaped pipe.

[0006] Preferably, the spraying mechanism includes a storage tube, one end of the L-shaped tube is fixedly connected to the inside of the storage tube, a second hydraulic rod is fixedly connected to the lower surface of the first base plate, a sliding plate is fixedly connected to the output end of the second hydraulic rod, the outer wall of the sliding plate is in contact with the inner wall of the storage tube, a filter screen is fixedly connected to the inside of the storage tube, and an installation mechanism is provided inside the storage tube.

[0007] Preferably, the installation mechanism includes a nozzle, a second fixing ring is fixedly connected inside the nozzle, a first fixing ring is fixedly connected inside the storage tube, a third fixing ring is disposed inside the first fixing ring, an X-shaped bracket is fixedly connected inside the third fixing ring, an insert block is slidably connected inside the X-shaped bracket, a limit rod is fixedly connected to one side of the outer wall of the insert block, a second connecting plate is rotatably connected inside the first fixing ring, one side of the outer wall of the second connecting plate is fixedly connected to one side of the outer wall of the second fixing ring, and one side of the outer wall of the storage tube is disposed on one side of the outer wall of the nozzle.

[0008] Preferably, the second connecting plate has a groove inside, the inner wall of the groove is slidably connected to the outer wall of the limiting rod, the first fixing ring has a slot inside, and the outer wall of the third fixing ring is slidably connected to the inner wall of the slot.

[0009] Preferably, a steering ball is fixedly connected to one side of the outer wall of the cylinder, a connecting plate is provided on the outer surface of the steering ball, a support rod is rotatably connected inside the connecting plate, a C-shaped frame is provided on one side of the outer wall of the steering ball, a limit post is fixedly connected inside the C-shaped frame, a support plate is provided on the outer wall of the limit post, a second motor is fixedly connected to one side of the outer wall of the support plate, and the output end of the second motor is fixedly connected to one end of the limit post.

[0010] Preferably, the upper surface of the connecting plate is provided with a first connecting plate, the lower surface of the first connecting plate is fixedly connected with a second support frame, and the lower surface of the second support frame is fixedly connected with a second base plate.

[0011] Preferably, a second gear is fixedly connected to the outer wall of the support rod, a stirring blade is fixedly connected to the upper end of the outer wall of the support rod, and a stirring tank is provided on the upper surface of the second gear.

[0012] Preferably, the stirring blade is disposed inside the stirring tank, and a first gear is disposed on the lower surface of the stirring tank, the first gear meshing with a second gear.

[0013] Preferably, the first gear has a rotating shaft inside, a connecting frame is provided on the lower surface of the first gear, a first motor is provided inside the connecting frame, and the output end of the first motor is fixedly connected to one end of the rotating shaft.

[0014] Preferably, a first support frame is fixedly connected to one side of the outer wall of the mixing tank, the lower surface of the first support frame is fixedly connected to the upper surface of the second base plate, and the upper surface of the connecting frame is fixedly connected to one side of the outer wall of the first support frame.

[0015] Working Principle: The device is mounted on the seeder via a base plate. A first motor drives a first gear to rotate via a shaft. The first gear meshes with a second gear, rotating the stirring blades to ensure uniform mixing of the liquid fertilizer in the mixing tank. The stirring blades are driven by a second motor to ensure that the liquid fertilizer does not settle or separate during storage, maintaining uniformity. A cylinder controls the up-and-down movement of the first connecting pipe and the connected protective plate. A three-way pipe inside the protective plate is connected to the protective plate via a fixed column to ensure its stability. The movement of the first hydraulic rod is transmitted to the three-way pipe via a connecting rod, adjusting the position of the spraying mechanism inside the storage pipe, thereby adjusting the spray angle and height of the liquid fertilizer. The nozzles inside the storage pipe are precisely adjusted in position through the coordinated action of the second hydraulic rod and a sliding plate. The nozzle is stably positioned by the combination of the bracket and the insert block, through the sliding of the limiting rod and the cooperation of the sliding groove in the first fixing ring. The setting of the second and third fixing rings further fixes the nozzle and ensures the stability of the spraying process. The liquid fertilizer in the mixing tank is evenly stirred by the rotation of the mixing blades and transported to the storage pipe through the L-shaped pipe. After being filtered through the filter screen in the storage pipe, the liquid fertilizer enters the nozzle. The nozzle design ensures the uniform spraying of liquid fertilizer. The spraying position and range can be adjusted by controlling the second hydraulic rod to adapt to different sowing requirements. The first support frame and the second support frame, together with the first base plate and the second base plate, provide support and stability for the entire device. This design makes the device easy to install on the seeder and is conducive to the stability and durability of the device.

[0016] This invention provides an automatic liquid fertilizer spraying device for a seeder. It has the following beneficial effects:

[0017] 1. This invention achieves precise adjustment of the height and angle of the spraying mechanism through the combination of cylinder and hydraulic rod design. This mechanism can automatically adjust the spraying height and range according to different stages of crop growth and terrain undulations, thereby achieving local fertilization, reducing fertilizer drift and loss, and improving fertilizer utilization.

[0018] 2. The multiple fixing mechanisms of the nozzle in this invention, including the second fixing ring, X-shaped bracket, and insert block, ensure the stability of the nozzle during operation, reduce turbulence and fluctuations in the liquid fertilizer during spraying, and thus improve the uniformity of spraying. Simultaneously, the above design allows for the quick installation and replacement of different nozzle models.

[0019] 3. The design of the chute and limit rod makes it possible to adjust the precise position of the nozzle, allowing the operator or automatic control system to adjust the direction and range of spraying as needed. This design may be based on a deep understanding of crop growth habits to achieve a fertilization pattern that better meets the growth needs.

[0020] 4. The present invention provides stable and efficient power transmission through the matching design of the first motor and the first and second gears of the gear system, reducing energy loss and improving the overall energy efficiency ratio. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is an exploded view of the present invention;

[0023] Figure 3 This is a schematic diagram of the protective plate structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the limiting post structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the storage tube portion of the present invention;

[0026] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0027] Figure 7 This is a schematic diagram of the second gear part of the present invention.

[0028] The components include: 1. First support frame; 2. Mixing tank; 3. Connecting frame; 4. First motor; 5. First gear; 6. Second gear; 7. Second support frame; 8. First connecting plate; 9. First base plate; 10. Cylinder; 11. First connecting pipe; 12. Protective plate; 13. L-shaped pipe; 14. Storage pipe; 15. Mixing blade; 16. Side plate; 17. Connecting rod; 18. First hydraulic rod; 19. Base; 20. Second connecting pipe; 21. Sprayer. 21. Nose; 22. T-pipe; 23. Fixing post; 24. First fixing ring; 25. Second base plate; 26. Second motor; 27. Connecting plate; 28. Support plate; 29. ​​Limiting post; 30. C-shaped frame; 31. Steering ball; 32. Second hydraulic rod; 33. Filter screen; 34. X-shaped bracket; 35. Second fixing ring; 36. Second connecting plate; 37. Third fixing ring; 38. Insert block; 39. Limiting rod; 40. Slot; 41. Support rod. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example:

[0031] Please see the appendix Figure 1 - Appendix Figure 2 This invention provides an automatic liquid fertilizer spraying device for a seeder, comprising a first base plate 9, a cylinder 10 fixedly connected to the upper surface of the first base plate 9, a first connecting pipe 11 fixedly connected to the output end of the cylinder 10, one end of the first connecting pipe 11 fixedly connected to the inside of a protective plate 12, a three-way pipe 22 disposed inside the protective plate 12, a fixing post 23 fixedly connected to one side of the outer wall of the three-way pipe 22, one end of the fixing post 23 rotatably connected to the inside of the protective plate 12, and a second connecting pipe 20 fixedly connected to the inside of the protective plate 12. A first fixing ring 24 is fixedly connected to the lower surface of the cylinder 10, and a base 19 is fixedly connected to the upper surface of the first fixing ring 24. A first hydraulic rod 18 is rotatably connected inside the base 19. A connecting rod 17 is fixedly connected to the output end of the first hydraulic rod 18. One end of the connecting rod 17 is fixedly connected to the other end of the three-way pipe 22. A side plate 16 is fixedly connected to one side of the outer wall of the protective plate 12. The connecting rod 17 passes through the interior of the side plate 16. An L-shaped pipe 13 is fixedly connected inside the protective plate 12. A spraying mechanism is fixedly connected to one end of the L-shaped pipe 13.

[0032] Specifically, the three-way pipe 22 inside the protective plate 12 provides a channel for the flow of liquid fertilizer and is connected to the protective plate body through the fixing column 23, ensuring the stability of the three-way pipe. The design of the fixing column 23 allows it to rotate inside the protective plate 12, which may be used to adjust the flow direction of liquid fertilizer or maintain the positioning of the pipeline. The first hydraulic rod 18 is connected to the first fixing ring 24 through the base 19, allowing the hydraulic rod to rotate or extend. The function of the connecting rod 17 is to transmit the movement of the first hydraulic rod 18 to the three-way pipe 22, thereby adjusting the position of the spraying mechanism.

[0033] In one embodiment, the combined use of cylinder 10 and first hydraulic rod 18 allows the device to make precise height and angle adjustments to adapt to different crops and terrains, accurately control the spraying position of liquid fertilizer, and reduce waste.

[0034] Please see the appendix Figure 5 The spraying mechanism includes a storage tube 14, one end of an L-shaped tube 13 is fixedly connected to the inside of the storage tube 14, a second hydraulic rod 32 is fixedly connected to the lower surface of the first base plate 9, a sliding plate is fixedly connected to the output end of the second hydraulic rod 32, the outer wall of the sliding plate is in contact with the inner wall of the storage tube 14, a filter screen 33 is fixedly connected to the inside of the storage tube 14, and an installation mechanism is provided inside the storage tube 14.

[0035] Specifically, the mounting mechanism inside the storage tube 14 is responsible for fixing and supporting the key components of the spraying mechanism, ensuring its stability during liquid fertilizer spraying. The second hydraulic rod 32 is installed below the first base plate 9, and its output end is connected to the sliding plate. The sliding plate fits tightly against the inner wall of the storage tube 14 and can slide along the inner wall of the storage tube. When the second hydraulic rod 32 extends or retracts, it can push the liquid fertilizer inside the storage tube 14, thereby achieving the spraying effect.

[0036] In one embodiment, the second hydraulic rod 32 can adjust the liquid fertilizer pressure inside the storage tube 14 by moving the sliding plate, thereby controlling the spraying intensity and range to achieve precise fertilization. The storage tube 14 provides sufficient space and time to ensure that the liquid fertilizer is evenly distributed before reaching the nozzle, thus achieving a uniform spraying effect.

[0037] Please see the appendix Figure 3 and 6The installation mechanism includes a nozzle 21, a second fixing ring 35 fixedly connected inside the nozzle 21, a first fixing ring 24 fixedly connected inside the storage tube 14, a third fixing ring 37 disposed inside the first fixing ring 24, an X-shaped bracket 34 fixedly connected inside the third fixing ring 37, an insert block 38 slidably connected inside the X-shaped bracket 34, a limit rod 39 fixedly connected to one side of the outer wall of the insert block 38, a second connecting plate 36 rotatably connected inside the first fixing ring 24, one side of the outer wall of the second connecting plate 36 fixedly connected to one side of the outer wall of the second fixing ring 35, and one side of the outer wall of the storage tube 14 disposed on one side of the outer wall of the nozzle 21.

[0038] Specifically, the second retaining ring 35 is fixed inside the nozzle 21, the first retaining ring 24 is fixed inside the storage tube 14, and the third retaining ring 37 is disposed inside the first retaining ring 24. These retaining rings form a multi-layered support structure for stabilizing the nozzle 21 and other internal components. The X-shaped bracket 34 is located inside the third retaining ring 37 and is connected to the limiting rod 39 via the insert block 38. This design provides stable support while allowing the insert block 38 to slide along the inside of the X-shaped bracket when necessary to adjust the pressure or flow rate inside the nozzle.

[0039] In one embodiment, the combined use of multi-layered retaining rings and X-shaped brackets provides a stable installation of nozzle 21, reduces vibration and offset during operation, and ensures spraying accuracy. The design of insert block 38 and limit rod 39 is used to adjust spraying pressure or flow under different working conditions, increasing the flexibility and adaptability of the equipment. The structural design allows for quick disassembly and assembly of internal components, facilitating the maintenance and cleaning of nozzle 21 and related components.

[0040] Please see the appendix Figure 6 The second connecting plate 36 has a groove inside, and the inner wall of the groove is slidably connected to the outer wall of the limiting rod 39. The first fixing ring 24 has a slot 40 inside, and the outer wall of the third fixing ring 37 is slidably connected to the inner wall of the slot 40.

[0041] Specifically, the slot 40 inside the first fixing ring 24 slides in conjunction with the outer wall of the third fixing ring 37, which provides stable axial support and allows the third fixing ring 37 to slide along the slot 40 within a certain range for adjusting the position of components inside the nozzle 21.

[0042] In one embodiment, the combined use of the limiting rod 39 and the slide groove, as well as the cooperation between the third fixing ring 37 and the slot 40, makes the internal structure of the nozzle more flexible and can be adjusted as needed to optimize the spraying effect.

[0043] Please see the appendix Figure 4A steering ball 31 is fixedly connected to one side of the outer wall of the cylinder 10. A connecting plate 27 is provided on the outer surface of the steering ball 31. A support rod 41 is rotatably connected inside the connecting plate 27. A C-shaped frame 30 is provided on one side of the outer wall of the steering ball 31. A limit post 29 is fixedly connected inside the C-shaped frame 30. A support plate 28 is provided on the outer wall of the limit post 29. A second motor 26 is fixedly connected to one side of the outer wall of the support plate 28. The output end of the second motor 26 is fixedly connected to one end of the limit post 29.

[0044] Specifically, the stirring blade 15 rotates inside the connecting plate 27, which may be to maintain the uniformity of the liquid fertilizer during storage or transportation and prevent sedimentation. The output end of the second motor 26 is connected to one end of the limiting post 29, which indicates that the second motor 26 may be the power source used to drive the stirring blade 15, and the power is transmitted through the support plate 28 and the C-shaped frame 30.

[0045] In one embodiment, the stirring blade 15 ensures that the liquid fertilizer remains uniform before storage or application, improving fertilization effect and crop absorption efficiency. The steering ball 31 provides a certain directional adjustment capability for the spraying mechanism to adapt to different working conditions and needs.

[0046] Please see the appendix Figure 4 The upper surface of the connecting plate 27 is provided with a first connecting plate 8, the lower surface of the first connecting plate 8 is fixedly connected with a second support frame 7, and the lower surface of the second support frame 7 is fixedly connected with a second base plate 25.

[0047] Specifically, a second support frame 7 is fixedly connected to the lower surface of the first connecting plate 8, which indicates that the second support frame 7 may be used to increase the support force and stability of the entire device and ensure the structural integrity of the device during operation.

[0048] In one embodiment, the connecting plate 27, the first connecting plate 8, the second support frame 7, and the second base plate 25 constitute a key support and connection frame for the automatic liquid fertilizer spraying device. This frame not only provides structural stability but may also enhance the overall durability of the device.

[0049] Please see the appendix Figure 7 The outer wall of the support rod 41 is fixedly connected to the second gear 6, and the upper end of the outer wall of the support rod 41 is fixedly connected to the stirring blade 15. The upper surface of the second gear 6 is provided with the stirring tank 2.

[0050] Specifically, the upper surface of the second gear 6 is provided with a stirring tank 2, which may mean that the stirring tank 2 is located above the second gear 6, and the second gear 6 is connected to the stirring blade 15 inside the stirring tank 2 through a support rod 41.

[0051] In one embodiment, the stirring blade 15 is directly driven by the second gear 6, which can effectively transmit power to the stirring blade and improve stirring efficiency. The stirring tank 2 is located on the second gear 6, and the second gear 6 directly drives the stirring blade 15. This design makes the entire device structure more compact and saves space.

[0052] Please see the appendix Figure 7 The stirring blade 15 is disposed inside the stirring tank 2, and the lower surface of the stirring tank 2 is provided with a first gear 5, which meshes with the second gear 6.

[0053] In one embodiment, the rotation of the stirring blade 15 can be more efficient and uniform through the gear transmission system, ensuring that the liquid fertilizer is fully mixed inside the entire mixing tank 2. The gear meshing can provide a precise speed ratio and torque transmission, ensuring that the stirring blade 15 rotates at a constant speed and avoiding the impact of speed fluctuations on the mixing effect.

[0054] Please see the appendix Figure 2 The first gear 5 has a rotating shaft inside, and a connecting frame 3 is provided on the lower surface of the first gear 5. The first motor 4 is provided inside the connecting frame 3, and the output end of the first motor 4 is fixedly connected to one end of the rotating shaft.

[0055] In one embodiment, power is transmitted through gear meshing. Compared to other transmission methods, such as belt or chain drives, gear drives are more reliable and easier to maintain.

[0056] Please see the appendix Figure 1 A first support frame 1 is fixedly connected to one side of the outer wall of the mixing tank 2. The lower surface of the first support frame 1 is fixedly connected to the upper surface of the second base plate 25. The upper surface of the connecting frame 3 is fixedly connected to one side of the outer wall of the first support frame 1.

[0057] In one embodiment, the use of the first support frame 1 improves the stability of the entire mixing device, ensuring that the mixing tank 2 remains stable under long-term operation and different working conditions. Through the design of the first support frame 1 and the second base plate 25, the mixing mechanism of the automatic liquid fertilizer spraying device is stably installed and supported, ensuring the overall stability of the equipment and the reliability of its operation.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic liquid fertilizer spraying device for a seeder, comprising a first base plate (7), characterized in that, A cylinder (8) is fixedly connected to the upper surface of the first base plate (7). A first connecting pipe (9) is fixedly connected to the output end of the cylinder (8). One end of the first connecting pipe (9) is fixedly connected to the inside of the protective plate (10). A three-way pipe (20) is provided inside the protective plate (10). A fixing post (21) is fixedly connected to one side of the outer wall of the three-way pipe (20). One end of the fixing post (21) is rotatably connected to the inside of the protective plate (10). A second connecting pipe (18) is fixedly connected to the inside of the protective plate (10). A first fixing ring (22) is fixedly connected to the lower surface of the cylinder (8). The upper surface of the first fixing ring (22) is fixedly connected to a base (17), the base (17) is rotatably connected to a first hydraulic rod (16), the output end of the first hydraulic rod (16) is fixedly connected to a connecting rod (15), one end of the connecting rod (15) is fixedly connected to the other end of the three-way pipe (20), a side plate (14) is fixedly connected to one side of the outer wall of the protective plate (10), the connecting rod (15) penetrates into the interior of the side plate (14), an L-shaped pipe (11) is fixedly connected to the interior of the protective plate (10), and a spraying mechanism is fixedly connected to one end of the L-shaped pipe (11). The spraying mechanism includes a storage tube (12), one end of the L-shaped tube (11) is fixedly connected to the inside of the storage tube (12), a second hydraulic rod (24) is fixedly connected to the lower surface of the first base plate (7), a sliding plate is fixedly connected to the output end of the second hydraulic rod (24), the outer wall of the sliding plate is in contact with the inner wall of the storage tube (12), a filter screen (25) is fixedly connected to the inside of the storage tube (12), and an installation mechanism is provided inside the storage tube (12). The installation mechanism includes a nozzle (19), a second fixing ring (27) is fixedly connected inside the nozzle (19), a first fixing ring (22) is fixedly connected inside the storage tube (12), a third fixing ring (29) is provided inside the first fixing ring (22), an X-shaped bracket (26) is fixedly connected inside the third fixing ring (29), an insert block (30) is slidably connected inside the X-shaped bracket (26), a limit rod (31) is fixedly connected to one side of the outer wall of the insert block (30), a second connecting plate (28) is rotatably connected inside the first fixing ring (22), one side of the outer wall of the second connecting plate (28) is fixedly connected to one side of the outer wall of the second fixing ring (27), and one side of the outer wall of the storage tube (12) is provided on one side of the outer wall of the nozzle (19).

2. The automatic liquid fertilizer spraying device for a seeder according to claim 1, characterized in that, The second connecting plate (28) has a groove inside, and the inner wall of the groove is slidably connected to the outer wall of the limiting rod (31). The first fixing ring (22) has a slot (32) inside, and the outer wall of the third fixing ring (29) is slidably connected to the inner wall of the slot (32).

3. The automatic liquid fertilizer spraying device for a seeder according to claim 1, characterized in that, The stirring blade (13) is disposed inside the stirring tank (2), and a first gear (5) is disposed on the lower surface of the stirring tank (2), which meshes with a second gear (6).

4. The automatic liquid fertilizer spraying device for a seeder according to claim 3, characterized in that, The first gear (5) has a rotating shaft inside, and a connecting frame (3) is provided on the lower surface of the first gear (5). The connecting frame (3) has a first motor (4) inside, and the output end of the first motor (4) is fixedly connected to one end of the rotating shaft.

5. The automatic liquid fertilizer spraying device for a seeder according to claim 4, characterized in that, The mixing tank (2) is fixedly connected to one side of the outer wall of the first support frame (1), the lower surface of the first support frame (1) is fixedly connected to the upper surface of the second base plate (23), and the upper surface of the connecting frame (3) is fixedly connected to one side of the outer wall of the first support frame (1).

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