Pneumatic agricultural machinery multifunctional sowing device and method

Abstract

A pneumatic agricultural machinery multifunctional sowing device, comprising a first connection plate (1), wherein a plurality of plowing mechanisms are fixedly connected at equal intervals to the end of the first connection plate (1) away from a traction apparatus; a second connection plate (2) is fixedly connected to the bottom surface of the first connection plate (1) away from the plowing mechanisms; a plurality of soil crushing and leveling mechanisms are fixedly connected at equal intervals to the side of the second connection plate (2) away from the plowing mechanisms; a plurality of sowing mechanisms are fixedly connected at equal intervals to the end of the first connection plate (1) away from the soil crushing and leveling mechanisms; each sowing mechanism comprises a sowing box (3) fixedly connected to the top surface of the first connection plate (1); the bottom of each sowing box (3) is in communication with a sowing portion; and the sowing boxes (3) are in communication with a negative pressure mechanism. By means of the device, ploughing, soil crushing and leveling, sowing, and soil backfilling can be performed, thereby reducing the risk of seed crushing and blockage, facilitating control over seed placement and improving the sowing efficiency. Further included is a method for using the pneumatic agricultural machinery multifunctional sowing device.

Description

A pneumatic agricultural machinery multi-functional seeding device and method Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, and in particular relates to a pneumatic agricultural machinery multifunctional seeding device and method. Background Technology

[0002] Currently, most wheat sowing machinery is row-sowing machinery. Its extensive seeding method is no longer sufficient for uniform sowing production and cannot meet the demands of high-quality, high-efficiency large-scale wheat production, becoming a bottleneck restricting wheat production. With the development of moderately scaled land management, traditional mechanized sowing equipment is evolving towards large-scale, intelligent pneumatic seeding systems. Pneumatic seeding machines for rice and wheat possess significant technological advantages such as high autonomy, mobility, productivity, and ease of loading and adjustment, and have a promising future in conservation agriculture. However, existing pneumatic seeding machines for rice and wheat mostly use centralized seed supply and multiple rows per machine. Large-capacity seed supply easily causes seed damage and carries a high risk of clogging, affecting sowing efficiency.

[0003] Chinese patent CN209834007U discloses a spreader, a spreading device, and plant protection equipment. The spreader includes a material-collecting component, a material-receiving component, and a material-feeding component. The material-collecting component discharges material into the material-receiving component, and the material-feeding component generates airflow to mix with the material, using pneumatic force to spread the material. Chinese patent CN106416530A discloses a material spreading device mounted on an agricultural drone. This device uses a discharge wheel under the material box, adjusts the discharge rate by controlling the discharge motor controller, and installs a fan next to the roller to discharge the material using pneumatic force. Although the above-mentioned drone seeding operation improves the uniformity of seeding compared to manual seeding, it still has the following shortcomings: 1) After the seeds are discharged from the seed metering device, the seed landing position is uncontrollable due to the interference of the rotor wind, and the seed landing uniformity is not good enough; 2) The seed metering device is prone to arching and clogging; 3) When using the seeding method, the seeds are scattered and disorderly, and it is difficult for the seeds to land in rows and holes, resulting in poor ventilation and permeability of crops, which makes them prone to pests and diseases, and is also inconvenient for field management during the growing season.

[0004] Summary of the Invention

[0005] The purpose of this invention is to provide a pneumatic agricultural machinery multifunctional seeding device and method to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a pneumatic agricultural machinery multi-functional seeding device, including a first connecting plate, one end of which is connected to a traction device. Multiple plowing mechanisms are fixedly connected at equal intervals to the end of the first connecting plate away from the traction device. A second connecting plate is fixedly connected to the bottom surface of the first connecting plate away from the plowing mechanisms. Multiple soil-breaking and leveling mechanisms are fixedly connected at equal intervals to the side of the second connecting plate away from the plowing mechanisms. Multiple seeding mechanisms are fixedly connected at equal intervals to the end of the first connecting plate away from the soil-breaking and leveling mechanisms. The seeding mechanism includes a seeding box fixed to the top surface of the first connecting plate. A seeding section is connected to the bottom of the seeding box. A negative pressure mechanism is connected to the seeding box. The negative pressure mechanism is fixed to the top surface of the first connecting plate. Multiple soil-covering mechanisms are provided at equal intervals on the bottom of the first connecting plate away from the seeding box.

[0007] Preferably, a first motor is fixedly connected to one side of the seeding box, the output shaft of the first motor extends into the seeding box and is fixedly connected to a seeding tray, a plurality of first grooves are fixedly connected at equal intervals around the circumference of the seeding tray, and a first through hole is provided in the first groove, a first type box is fixedly connected to the side of the seeding box away from the first motor, a second type box is fixedly connected to the inner wall of the seeding box near the first type box, the second type box communicates with the first type box, and a sorting mechanism is provided on the side of the seeding box away from the second type box, the sorting mechanism is located above the seeding section.

[0008] Preferably, the outer circumferential side of the seeding tray is provided with a plurality of teeth at equal intervals. The sorting mechanism includes a first connecting shaft rotatably connected to the inner wall of the seeding box. The first connecting shaft is located on the side of the seeding box near the first groove. A sorting tray is fixedly connected to the first connecting shaft. A plurality of sorting teeth are fixedly connected to the sorting tray at equal intervals. A first gear is fixedly connected to one end of the first connecting shaft near the teeth. The first gear meshes with the teeth. A third connecting plate is fixedly connected to one side of the sorting tray. The third connecting plate is fixedly connected to the inner wall of the seeding box. The bottom of the third connecting plate is located above the seeding section. A second groove is provided on the side of the seeding box near the sorting tray. The sorting teeth are located in the second groove.

[0009] Preferably, the sowing section includes a first connecting pipe fixed inside the sowing box. The first connecting pipe is located below the sorting tray. The bottom of the first connecting pipe passes through the first connecting plate and is located below the first connecting plate. The bottom of the first connecting plate is symmetrically fixed with first electric telescopic rods. Two first electric telescopic rods are located on both sides of the first connecting pipe. The bottom of the two first electric telescopic rods is fixed with a fourth connecting plate. The fourth connecting plate is slidably connected to the first connecting pipe. The bottom surface of the fourth connecting plate is symmetrically fixed with first connecting rods. Two first connecting rods are located on both sides of the first connecting pipe. The bottom surface of the two first connecting rods is fixed with a sowing component.

[0010] Preferably, the seeding component includes a fifth connecting plate fixedly connected to the first connecting rod, the fifth connecting plate having a second through hole, the bottom of the first connecting tube being located within the second through hole, the bottom of the fifth connecting plate being fixedly connected to and communicating with a seeding rod, the seeding rod communicating with the second through hole, and the forward end of the seeding rod being fixedly connected to a furrowing knife.

[0011] Preferably, the negative pressure mechanism includes a high-pressure air pump fixed to the top surface of the first connecting plate, a second connecting pipe fixed to the top surface of the high-pressure air pump, a third connecting pipe fixed to the top surface of the second connecting pipe, and a plurality of fourth connecting pipes fixed to the third connecting pipe, the fourth connecting pipes being respectively connected to the seeding box.

[0012] Preferably, the plowing mechanism includes a second electric telescopic rod fixed to the bottom surface of the first connecting plate, and a plowing seat is fixed to the bottom surface of the second electric telescopic rod.

[0013] Preferably, a second connecting rod is symmetrically fixed to the bottom surface of the first connecting plate, and a second connecting plate is symmetrically fixed to the bottom surface of the second connecting rod. The soil breaking and leveling mechanism includes a third connecting rod fixed to the second connecting plate. The third connecting rod is hinged to a first hinge seat. A first connecting frame is fixed to the end of the first hinge seat away from the third connecting rod. A soil breaking and leveling roller is rotatably connected inside the first connecting frame. A second hinge seat is fixed to the top surface of the first connecting frame near the first hinge seat. A third electric telescopic rod is hinged to the second hinge seat. The third electric telescopic rod is fixed to the bottom surface of the first connecting plate.

[0014] Preferably, the soil covering mechanism includes a spring telescopic column fixed to the bottom surface of the first connecting plate, a first connecting seat symmetrically fixed to the bottom of the spring telescopic column, and a soil covering wheel rotatably connected to the end of the first connecting seat away from the spring telescopic column.

[0015] A method for using a pneumatic agricultural machinery multi-functional seeding device includes the following steps:

[0016] S1. Connect the first connecting plate to the traction device and turn the soil through the plowing mechanism;

[0017] S2. After turning the soil in step S1, the soil clods are broken up by the soil breaking and leveling mechanism.

[0018] S3. After the land is broken up in step S2, sowing is carried out under the combined action of the negative pressure mechanism and the sowing mechanism.

[0019] S4. After sowing in S3, the soil is restored using the covering mechanism to complete the sowing process.

[0020] This invention discloses the following technical advantages: The first connecting plate is connected to the traction device, and the land is turned over by a plowing mechanism. The soil clods after turning are broken up by a soil-crushing and leveling mechanism. Sowing is carried out under the combined action of a negative pressure mechanism and a sowing mechanism. Finally, the sown soil is restored by a soil-covering mechanism, completing the sowing process. This invention reduces the risk of seed breakage and clogging, while also facilitating control of the seed placement position and improving sowing efficiency. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 is a schematic diagram of the structure of the pneumatic agricultural machinery multi-functional seeding device of the present invention;

[0023] Figure 2 is a front view of the pneumatic agricultural machinery multi-functional seeding device of the present invention;

[0024] Figure 3 is a magnified view of part A in Figure 2;

[0025] Figure 4 is a schematic diagram of the structure of the first motor of the present invention.

[0026] In the diagram: 1. First connecting plate; 2. Second connecting plate; 3. Seeding box; 4. First motor; 5. Seeding tray; 6. First groove; 7. First through hole; 8. First type box; 9. Second type box; 10. Teeth; 11. First connecting shaft; 12. Sorting tray; 13. Sorting teeth; 14. Third connecting plate; 15. Second groove; 16. First connecting pipe; 17. First electric telescopic rod; 18. Fourth connecting plate; 19. First connecting rod; 20. Fifth connecting plate; 21. Second through hole; 22. 23. Seeding rod; 24. Furrowing knife; 25. High-pressure air pump; 26. Second connecting pipe; 27. Third connecting pipe; 28. Fourth connecting pipe; 29. ​​Second electric telescopic rod; 30. Plowing seat; 31. Second connecting rod; 32. Third connecting rod; 33. First hinge seat; 34. First connecting frame; 35. Soil-breaking and leveling roller; 36. Second hinge seat; 37. Third electric telescopic rod; 38. Spring telescopic column; 39. First connecting seat; 40. Soil-covering wheel; 41. First baffle; 42. Second baffle. Detailed Implementation

[0027] 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.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Referring to Figures 1-4, this embodiment provides a pneumatic agricultural machinery multi-functional seeding device, including a first connecting plate 1. One end of the first connecting plate 1 is connected to a traction device. Multiple plowing mechanisms are fixedly connected at equal intervals at the end of the first connecting plate 1 away from the traction device. A second connecting plate 2 is fixedly connected to the bottom surface of the first connecting plate 1 away from the plowing mechanisms. Multiple soil breaking and leveling mechanisms are fixedly connected at equal intervals on the side of the second connecting plate 2 away from the plowing mechanisms. Multiple seeding mechanisms are fixedly connected at equal intervals at the end of the first connecting plate 1 away from the soil breaking and leveling mechanisms. The seeding mechanism includes a seeding box 3 fixedly connected to the top surface of the first connecting plate 1. The bottom of the seeding box 3 is connected to a seeding section. The seeding box 3 is connected to a negative pressure mechanism. The negative pressure mechanism is fixedly connected to the top surface of the first connecting plate 1. Multiple soil covering mechanisms are provided at equal intervals at the bottom of the first connecting plate 1 away from the seeding box 3.

[0030] The first connecting plate 1 is connected to the traction device, and the land is turned over by the plowing mechanism. The soil clods after turning over are broken up by the soil crushing and leveling mechanism. Sowing is carried out under the combined action of the negative pressure mechanism and the sowing mechanism. The soil after sowing is restored by the covering mechanism, thus completing the sowing work.

[0031] In a further optimized design, a first motor 4 is fixedly connected to one side of the seeding box 3. The output shaft of the first motor 4 extends into the seeding box 3 and is fixedly connected to a seeding disc 5. Multiple first grooves 6 are fixedly connected to the seeding disc 5 at equal intervals around the circumference. A first through hole 7 is provided in the first groove 6. A first type box 8 is fixedly connected to the side of the seeding box 3 away from the first motor 4. A second type box 9 is fixedly connected to the inner wall of the seeding box 3 near the first type box 8. The second type box 9 is connected to the first type box 8. A sorting mechanism is provided on the side of the seeding box 3 away from the second type box 9. The sorting mechanism is located above the seeding section.

[0032] A first baffle 40 is fixedly connected to the side of the seed box 3 near the first groove 6. The first baffle 40 is located near the top of the seeding tray 5. A second baffle 41 is fixedly connected to the bottom of the first baffle 40. The bottom of the second baffle 41 is located inside the second seed box 9.

[0033] Under the negative pressure of the negative pressure mechanism, the seeds are adsorbed into the first groove 6. When multiple seeds are adsorbed into a certain first groove 6, when the first groove 6 rotates to the top of the first baffle 40, the first baffle 40 scrapes out the excess seeds in the first groove 6 and slides them along the second baffle 41 into the second seed box 9.

[0034] In a further optimized design, the outer circumferential side of the seeding disc 5 is provided with multiple teeth 10 at equal intervals. The sorting mechanism includes a first connecting shaft 11 that is rotatably connected to the inner wall of the seeding box 3. The first connecting shaft 11 is located on the side of the seeding box 3 near the first groove 6. A sorting disc 12 is fixedly connected to the first connecting shaft 11. Multiple sorting teeth 13 are fixedly connected to the sorting disc 12 at equal intervals. A first gear is fixedly connected to the end of the first connecting shaft 11 near the teeth 10. The first gear meshes with the teeth 10. A third connecting plate 14 is fixedly connected to one side of the sorting disc 12. The third connecting plate 14 is fixedly connected to the inner wall of the seeding box 3. The bottom of the third connecting plate 14 is located above the seeding section. A second groove 15 is provided on the side of the seeding box 3 near the sorting disc 12. The sorting teeth 13 are located in the second groove 15.

[0035] As the seeding disc 5 rotates, the teeth 10 on the seeding disc 5 drive the first gear to rotate, the first gear drives the first connecting shaft 11 to rotate, the first connecting shaft 11 drives the sorting disc 12 to rotate, and the sorting disc 12 drives the sorting teeth 13 to rotate, thus peeling the seeds from the first groove 6 into the seeding section.

[0036] The scheme is further optimized. The sowing section includes a first connecting pipe 16 fixed inside the sowing box 3. The first connecting pipe 16 is located below the sorting tray 12. The bottom of the first connecting pipe 16 passes through the first connecting plate 1 and is located below the first connecting plate 1. The bottom of the first connecting plate 1 is symmetrically fixed with a first electric telescopic rod 17. The two first electric telescopic rods 17 are located on both sides of the first connecting pipe 16. The bottom of the two first electric telescopic rods 17 is fixed with a fourth connecting plate 18. The fourth connecting plate 18 is slidably connected to the first connecting pipe 16. The bottom surface of the fourth connecting plate 18 is symmetrically fixed with a first connecting rod 19. The two first connecting rods 19 are located on both sides of the first connecting pipe 16. The bottom surface of the two first connecting rods 19 is fixed with a sowing component.

[0037] In a further optimized design, the seeding component includes a fifth connecting plate 20 fixedly connected to the first connecting rod 19. The fifth connecting plate 20 has a second through hole 21. The bottom of the first connecting pipe 16 is located inside the second through hole 21. The bottom of the fifth connecting plate 20 is fixedly connected to and connected to a seeding rod 22. The seeding rod 22 is connected to the bottom surface and the second through hole 21. The forward end of the seeding rod 22 is fixedly connected to a furrowing knife 23.

[0038] Seeds fall into the second through hole 21 through the first connecting pipe 16 and are sown by contacting the ground through the sowing rod 22. The sowing depth of the sowing rod 22 is controlled by the first electric telescopic rod 17. When the first electric telescopic rod 17 extends, it drives the fourth connecting plate 18 to descend. The fourth connecting plate 18 drives the first connecting rod 19 to move downward. The first connecting rod 19 drives the fifth connecting plate 20 to move downward. The fifth connecting plate 20 drives the sowing rod 22 to move downward.

[0039] The scheme is further optimized. The negative pressure mechanism includes a high-pressure air pump 24 fixed to the top surface of the first connecting plate 1. A second connecting pipe 25 is fixed to the top surface of the high-pressure air pump 24. A third connecting pipe 26 is fixed to the top surface of the second connecting pipe 25. Multiple fourth connecting pipes 27 are fixed to the third connecting pipe. The fourth connecting pipes 27 are respectively connected to the seeding box 3.

[0040] The scheme is further optimized. The plowing mechanism includes a second electric telescopic rod 28 fixed to the bottom surface of the first connecting plate 1, and a plowing seat 29 is fixed to the bottom surface of the second electric telescopic rod 28.

[0041] The plowing depth is adjusted via the second electric telescopic rod 28.

[0042] In a further optimized design, a second connecting rod 30 is symmetrically fixed to the bottom surface of the first connecting plate 1, and a second connecting plate 2 is symmetrically fixed to the bottom surface of the second connecting rod 30. The soil breaking and leveling mechanism includes a third connecting rod 31 fixed to the second connecting plate 2. A first hinge seat 32 is hinged to the third connecting rod 31. A first connecting frame 33 is fixed to the end of the first hinge seat 32 away from the third connecting rod 31. A soil breaking and leveling roller 34 is rotatably connected inside the first connecting frame 33. A second hinge seat 35 is fixed to the top surface of the first connecting frame 33 near the first hinge seat 32. A third electric telescopic rod 36 is hinged to the second hinge seat 35. The third electric telescopic rod 36 is fixed to the bottom surface of the first connecting plate 1.

[0043] When it is necessary to adjust the height of the crushing roller, the third electric telescopic rod 36 is activated. The third electric telescopic rod 36 drives the second hinge seat 35 on the first connecting frame 33 to move. The second hinge seat 35 drives the first connecting frame 33 to rotate around the first hinge seat 32.

[0044] The scheme is further optimized. The soil covering mechanism includes a spring telescopic column 37 fixed to the bottom surface of the first connecting plate 1. A first connecting seat 38 is symmetrically fixed to the bottom of the spring telescopic column 37. A soil covering wheel 39 is rotatably connected to the end of the first connecting seat 38 away from the spring telescopic column 37.

[0045] A method for using a pneumatic agricultural machinery multi-functional seeding device includes the following steps:

[0046] S1. Connect the first connecting plate 1 to the traction device and turn the soil through the plow seat 29;

[0047] S2. After turning the soil in step S1, the soil clods are broken up by a soil breaking and leveling mechanism to facilitate subsequent sowing.

[0048] S3. After the land is broken up in step S2, sowing is carried out under the combined action of the negative pressure mechanism and the sowing mechanism.

[0049] S4. After sowing in S3, the soil is restored using the covering mechanism to complete the sowing process.

[0050] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A pneumatic agricultural machinery multi-functional seeding device, characterized in that: The system includes a first connecting plate (1), one end of which is connected to a traction device. Multiple plowing mechanisms are fixedly connected at equal intervals at the end of the first connecting plate (1) away from the traction device. A second connecting plate (2) is fixedly connected to the bottom surface of the first connecting plate (1) away from the plowing mechanism. Multiple soil breaking and leveling mechanisms are fixedly connected at equal intervals on the side of the second connecting plate (2) away from the plowing mechanism. Multiple sowing mechanisms are fixedly connected at equal intervals at the end of the first connecting plate (1) away from the soil breaking and leveling mechanism. The sowing mechanism includes a sowing box (3) fixedly connected to the top surface of the first connecting plate (1). The bottom of the sowing box (3) is connected to a sowing section. The sowing box (3) is connected to a negative pressure mechanism. The negative pressure mechanism is fixedly connected to the top surface of the first connecting plate (1). Multiple soil covering mechanisms are provided at equal intervals at the bottom of the first connecting plate (1) away from the sowing box (3).

2. The pneumatic agricultural machinery multi-functional seeding device according to claim 1, characterized in that: A first motor (4) is fixedly connected to one side of the seeding box (3). The output shaft of the first motor (4) extends into the seeding box (3) and is fixedly connected to a seeding tray (5). A plurality of first grooves (6) are fixedly connected to the seeding tray (5) at equal intervals in the circumferential direction. A first through hole (7) is provided in the first groove (6). A first type box (8) is fixedly connected to the side of the seeding box (3) away from the first motor (4). A second type box (9) is fixedly connected to the inner wall of the seeding box (3) near the first type box (8). The second type box (9) communicates with the first type box (8). A sorting mechanism is provided on the side of the seeding box (3) away from the second type box (9). The sorting mechanism is located above the seeding section.

3. The pneumatic agricultural machinery multi-functional seeding device according to claim 2, characterized in that: The outer circumferential of the seeding tray (5) is provided with a plurality of teeth (10) at equal intervals. The sorting mechanism includes a first connecting shaft (11) rotatably connected to the inner wall of the seeding box (3). The first connecting shaft (11) is located on the side of the seeding box (3) near the first groove (6). A sorting tray (12) is fixedly connected to the first connecting shaft (11). A plurality of sorting teeth (13) are fixedly connected to the sorting tray (12) at equal intervals. The first connecting shaft (11) is close to the teeth. One end of (10) is fixedly connected to a first gear, which meshes with the teeth (10). A third connecting plate (14) is fixedly connected to one side of the sorting disc (12). The third connecting plate (14) is fixedly connected to the inner wall of the seeding box (3). The bottom of the third connecting plate (14) is located above the seeding part. A second groove (15) is provided on the side of the seeding box (3) near the sorting disc (12). The sorting teeth (13) are located in the second groove (15).

4. The pneumatic agricultural machinery multi-functional seeding device according to claim 3, characterized in that: The sowing section includes a first connecting pipe (16) fixed inside the sowing box (3). The first connecting pipe (16) is located below the sorting tray (12). The bottom of the first connecting pipe (16) passes through the first connecting plate (1) and is located below the first connecting plate (1). The bottom of the first connecting plate (1) is symmetrically fixed with a first electric telescopic rod (17). The two first electric telescopic rods (17) are located on both sides of the first connecting pipe (16). The bottom of the two first electric telescopic rods (17) is fixed with a fourth connecting plate (18). The fourth connecting plate (18) is slidably connected to the first connecting pipe (16). The bottom surface of the fourth connecting plate (18) is symmetrically fixed with a first connecting rod (19). The two first connecting rods (19) are located on both sides of the first connecting pipe (16). The bottom surface of the two first connecting rods (19) is fixed with a sowing component.

5. The pneumatic agricultural machinery multi-functional seeding device according to claim 4, characterized in that: The seeding component includes a fifth connecting plate (20) fixedly connected to the first connecting rod (19). The fifth connecting plate (20) has a second through hole (21). The bottom of the first connecting pipe (16) is located in the second through hole (21). The bottom of the fifth connecting plate (20) is fixedly connected to and communicates with a seeding rod (22). The seeding rod (22) communicates with the second through hole (21). The forward end of the seeding rod (22) is fixedly connected to a furrowing knife (23).

6. The pneumatic agricultural machinery multi-functional seeding device according to claim 1, characterized in that: The negative pressure mechanism includes a high-pressure air pump (24) fixed to the top surface of the first connecting plate (1), a second connecting pipe (25) fixed to the top surface of the high-pressure air pump (24), a third connecting pipe (26) fixed to the top surface of the second connecting pipe (25), and a plurality of fourth connecting pipes (27) fixed to the third connecting pipe, the fourth connecting pipes (27) being respectively connected to the seeding box (3).

7. The pneumatic agricultural machinery multi-functional seeding device according to claim 1, characterized in that: The plowing mechanism includes a second electric telescopic rod (28) fixed to the bottom surface of the first connecting plate (1), and a plowing seat (29) is fixed to the bottom surface of the second electric telescopic rod (28).

8. The pneumatic agricultural machinery multi-functional seeding device according to claim 1, characterized in that: The bottom surface of the first connecting plate (1) is symmetrically fixed with a second connecting rod (30), and the bottom surface of the second connecting rod (30) is symmetrically fixed with a second connecting plate (2). The soil breaking and leveling mechanism includes a third connecting rod (31) fixed with the second connecting plate (2). The third connecting rod (31) is hinged with a first hinge seat (32). The end of the first hinge seat (32) away from the third connecting rod (31) is fixed with a first connecting frame (33). The first connecting frame (33) is rotatably connected with a soil breaking and leveling roller (34). The top surface of the first connecting frame (33) near the first hinge seat (32) is fixed with a second hinge seat (35). The second hinge seat (35) is hinged with a third electric telescopic rod (36). The third electric telescopic rod (36) is fixed with the bottom surface of the first connecting plate (1).

9. The pneumatic agricultural machinery multi-functional seeding device according to claim 1, characterized in that: The soil covering mechanism includes a spring telescopic column (37) fixed to the bottom surface of the first connecting plate (1). A first connecting seat (38) is symmetrically fixed to the bottom of the spring telescopic column (37). A soil covering wheel (39) is rotatably connected to the end of the first connecting seat (38) away from the spring telescopic column (37).

10. The method of using the pneumatic agricultural machinery multi-functional seeding device according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Connect the first connecting plate (1) to the traction device and turn the land through the plowing mechanism; S2. After turning the soil in step S1, the soil clods are broken up by the soil breaking and leveling mechanism. S3. After the land is broken up in step S2, sowing is carried out under the combined action of the negative pressure mechanism and the sowing mechanism. S4. After sowing in S3, the soil is restored using the covering mechanism to complete the sowing process.

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