Paste fertilizer applying device and method for self-cleaning fertilizer box

Abstract

The invention discloses a paste fertilizer applying device and method capable of automatically cleaning a fertilizer box, and belongs to the technical field of mechanical fertilization of rice. The fertilizer applicator comprises a fertilizer pusher assembly, a fertilizer box assembly, a spiral fertilizer feeder assembly, a small belt wheel, a transmission belt, a large belt wheel, a Z-shaped supporting plate, a universal joint and a square and round connecting shaft, the fertilizer pushing device assembly is installed at the upper end of the fertilizer box assembly, the fertilizer box assembly is connected to a rear operation part of the rice transplanter through a connection fixing plate, the bottom of the fertilizer box assembly is connected with the spiral fertilizer feeding device assembly through a box bottom fertilizer conveying pipe and an inclined fertilizer feeding pipe, a small belt wheel is installed on the spiral fertilizer feeding device assembly, and the small belt wheel is in transmission connection with a large belt wheel through a transmission belt. And the shaft end of the large belt wheel is connected with a gear shaft on the fertilizer pusher assembly through a universal joint and a square and round connecting shaft. The fertilizer pushing plate tightly attached to the box wall is driven by the gear and rack mechanism, fertilizer is forcibly supplied to the spiral fertilizer feeder assembly, the fertilizer is applied into a mud layer through the spiral fertilizer feeder assembly, and the problems of mechanical application of paste fertilizer and self-cleaning of the box wall are solved.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical fertilization of rice, and in particular to a paste fertilizer fertilization device and method for a self-cleaning fertilizer box. Background Art

[0002] Fertilization refers to the agricultural technical measures of applying fertilizer to the soil or spraying it on plants to provide the nutrients needed by plants and maintain and improve soil fertility. The main purpose of fertilization is to increase crop yields, improve crop quality, improve soil fertility and improve economic benefits. Fertilizers can be divided into three categories: organic fertilizers, inorganic fertilizers and biological fertilizers. Organic fertilizers: also known as farmyard manure, refers to fertilizers containing a large amount of organic matter, such as cake fertilizer, green manure, compost, livestock manure, etc. Inorganic fertilizers: also known as chemical fertilizers, there are many types, the common ones are nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers, etc. Biological fertilizers: also known as bacterial fertilizers, referred to as bacterial fertilizers, refer to fertilizers made from some microorganisms that are beneficial to agricultural production after artificial separation and cultivation. Fertilizers can be divided into granular and powdered fertilizers, paste fertilizers, liquid fertilizers, gas fertilizers, etc. according to their state. Liquid fertilizers, referred to as liquid fertilizers. Refers to fertilizers that have no fixed shape and are in a fluid state. Including clear liquid type and suspended type, my country mainly produces clear liquid type liquid fertilizers, such as ammonium phosphate solution of different concentrations produced by neutralizing liquid ammonia with phosphoric acid, superphosphoric acid, and polyphosphoric acid, which is a commonly used liquid fertilizer. If other nitrogen fertilizers, potassium chloride, and medium and trace elements are dissolved in appropriate proportions, multi-component liquid compound fertilizers can be produced. Sometimes herbicides, pesticides, fungicides, etc. can be added to liquid fertilizers to make multifunctional liquid fertilizers. The advantage of liquid fertilizers is that the production cost is low and it is convenient for irrigation and fertilization, but transportation, storage and application require corresponding supporting equipment.

[0003] In recent years, paste fertilizer has been used as base fertilizer in rice production due to its characteristics of being easily absorbed by crops, fast fertilizer effect and not easy to deliquesce. However, due to the lack of special fertilization machinery for paste fertilizer, fertilization is usually done manually, which has problems such as low efficiency and poor uniformity. Patent No. CN118451852A discloses a sowing synchronous screw fertilizer applicator and a screw fertilization mechanism, in which a spiral conduit is installed at the lower end of the fertilizer box, a fertilizer screw is installed in the spiral conduit, a discharge nozzle is installed at the lower end of the spiral conduit, a feed port is opened at the top of the spiral conduit, and a discharge port is opened at the bottom of the spiral conduit. The feed port is connected to the fertilizer box, and the discharge port is connected to the discharge nozzle; the inner wall of the inner cavity of the spiral conduit is a double-line spiral surface, the fertilizer screw is an eccentric spiral screw, and the lead of the spiral conduit is The cross section of the inner cavity of the spiral conduit is a waist-shaped hole, which is twice the pitch of the fertilizing screw. The semicircular diameters at both ends of the waist-shaped hole are the diameter of the fertilizing screw, and the distance between the straight sections of the waist-shaped hole is equal to four times the eccentricity of the fertilizing screw. The fertilizing screw meshes and rotates in the inner cavity of the spiral conduit. On the one hand, it rotates around its own axis, and on the other hand, it rolls along the surface of the waist-shaped hole in the inner cavity of the spiral conduit. A sealed chamber is formed between the spiral conduit and the fertilizing screw. For every rotation of the fertilizing screw, the fertilizer in the sealed chamber is pushed forward by one pitch and finally squeezed out from the discharge port. This patent can be applied to fertilizing granular and powdered fertilizers, paste fertilizers, liquid fertilizers and other fertilizers, and the fertilization is uniform, the pressure is stable and the accuracy is high. However, when paste fertilizers are actually used, due to the fact that the paste fertilizer is in liquid form and has low fluidity, it is easy to stick to the fertilizer box wall and is difficult to clean. Summary of the invention

[0004] The object of the present invention is to provide a paste fertilizer fertilizing device and method for a self-cleaning fertilizer box, which is used to solve the problem that the paste fertilizer is in liquid state but has low fluidity and is easy to stick to the fertilizer box wall.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A paste fertilizer fertilizing device for a self-cleaning fertilizer box, comprising a fertilizer pusher assembly, a fertilizer box assembly, a spiral fertilizer feeder assembly, a small pulley, a transmission belt, a large pulley, a zigzag support plate, a universal joint and a square and round connecting shaft; the fertilizer pusher assembly is installed at the upper end of the fertilizer box assembly, one side of the fertilizer box assembly is provided with a connecting fixing plate, and is connected to the rear working component of a rice transplanter through the connecting fixing plate, the bottom of the fertilizer box assembly is provided with a box bottom fertilizer delivery pipe, the box bottom fertilizer delivery pipe is connected to an inclined fertilizer delivery pipe arranged obliquely, the upper end of the inclined fertilizer delivery pipe is provided with a fertilizer feeder fixing plate, the fertilizer feeder fixing plate is used to connect the spiral fertilizer feeder assembly, a small pulley is installed on the motor transmission shaft of the spiral fertilizer feeder assembly, the small pulley is connected to the large pulley through the transmission belt, and the large pulley is installed on the other side of the fertilizer box assembly by the zigzag support plate; the shaft end of the large pulley is connected to the universal joint, and the universal joint is connected to the gear shaft on the fertilizer pusher assembly through the square and round connecting shaft.

[0007] Furthermore, the fertilizer pusher assembly consists of a left slide with a groove, a support plate, a fertilizer pushing plate, a rack frame, a right slide with a groove, a gear support frame, a gear and a gear shaft; the fertilizer pusher assembly is fixed to the upper end of the fertilizer box assembly through the support plate, the rack frame is slidably connected to the left slide and the right slide on both sides of the support plate, the bottom of the rack frame is fixedly connected to the fertilizer pushing plate, the inner side edge of the rack frame is meshed with the gear, the rear end face of the gear is connected to the gear shaft, the gear is installed on the gear support frame, and the gear support frame is fixed to the support plate.

[0008] Furthermore, the fertilizer box assembly consists of a fertilizer inlet, a connecting and fixing plate, a box body, a fertilizer delivery pipe at the bottom of the box, an inclined fertilizer delivery pipe and a fertilizer feeder fixing plate; the fertilizer inlet is obliquely arranged on one side of the upper end of the box body, and a connecting and fixing plate is fixed in the middle of one side of the box body, and the cavity of the box body is respectively connected with the fertilizer inlet, the fertilizer delivery pipe at the bottom of the box, and the inclined fertilizer delivery pipe.

[0009] Furthermore, the edge of the fertilizer pushing plate is tightly fitted with the inner wall of the box body.

[0010] Furthermore, the spiral fertilizer feeder assembly is composed of a driving motor, a spiral rod fixing plate, a connecting sleeve, a spiral fertilizer feeding rod, a sleeve connecting shaft and a motor transmission shaft; the spiral fertilizer feeder assembly is connected to the fertilizer feeder fixing plate through the spiral rod fixing plate, the spiral fertilizer feeding rod is arranged in the inclined fertilizer feeding pipe, the end of the spiral fertilizer feeding rod is installed in the connecting sleeve through the sleeve connecting shaft and is connected to the motor transmission shaft of the driving motor, and the driving motor rotates synchronously to drive the spiral fertilizer feeding rod and the small pulley to move together.

[0011] Furthermore, one end of the zigzag support plate is fixed on the box body, and the other end is used to install the large pulley.

[0012] The present invention provides another technical solution: a method for applying paste fertilizer to a self-cleaning fertilizer box, which is implemented based on a paste fertilizer applying device for a self-cleaning fertilizer box, and comprises the following steps:

[0013] S1: Add fertilizer: lift the whole device together with the working parts of the rice transplanter so that the oblique fertilizer delivery pipe is located above the mud layer, drive the motor to rotate clockwise, drive the large pulley to rotate clockwise through the small pulley and the transmission belt, and then drive the fertilizer pusher plate in the fertilizer pusher assembly to move to the upper plane of the box body, then the drive motor stops rotating, and the paste fertilizer is added into the box body through the fertilizer inlet, completing the fertilizer adding process;

[0014] S2: Fertilization: After the fertilizer is added, the whole device descends with the working parts of the rice transplanter, the oblique fertilizer delivery pipe is located in the mud layer, and the driving motor rotates counterclockwise, and the gears are driven to rotate through the small pulley, transmission belt, large pulley, universal joint, square and round connecting shaft, and gear shaft, so that the gear support frame moves downward, pushing the fertilizer push plate to move downward together, and pushing the paste fertilizer into the bottom fertilizer delivery pipe and the oblique fertilizer delivery pipe at the bottom of the box;

[0015] S3: The driving motor rotates counterclockwise and drives the sleeve connecting shaft and the spiral fertilizer feeding rod to rotate through the motor transmission shaft. The spiral blades on the spiral fertilizer feeding rod push the paste fertilizer to move to the lower end of the inclined fertilizer feeding pipe, and the paste fertilizer is discharged from the inclined fertilizer feeding pipe and applied to the mud layer. The device continues to work until all the fertilizers in the box are applied, and then the step of adding fertilizers is repeated.

[0016] Furthermore, the specific working process of the fertilizer pusher assembly in S1 is as follows: the large pulley drives the universal joint and the square and round connecting shaft to rotate, and then drives the gear shaft to rotate, the gear shaft drives the gear to rotate, the gear drives the rack frame to move upward in the grooves of the left slide and the right slide, and the rack frame drives the fertilizer pusher plate to move upward.

[0017] Furthermore, the amount of fertilizer pushed by the fertilizer pushing plate in S2 to the oblique fertilizer delivery pipe through the fertilizer delivery pipe at the bottom of the box can be achieved by changing the transmission ratio by replacing large pulleys or small pulleys with different diameters.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a paste fertilizer fertilizing device and method for a self-cleaning fertilizer box. Aiming at the problem that the paste fertilizer is in liquid form but has low fluidity and is easy to stick to the box wall, a fertilizer pushing plate close to the box wall driven by a gear rack mechanism is designed to force the fertilizer to be supplied to a spiral fertilizer feeder assembly, and the fertilizer is applied into the mud layer by the spiral fertilizer feeder assembly, thus solving the problem of mechanized paste fertilizer application. The fertilizer pushing plate close to the box wall brings up the fertilizer stuck to the box wall, thereby realizing a self-cleaning function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the overall structure of the present invention;

[0021] Figure 2 It is a front schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the back of the three-dimensional structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the rear axle side of the three-dimensional structure of the present invention;

[0024] Figure 5 For the present invention Figure 4 A magnified view of part A;

[0025] Figure 6 It is a schematic diagram of the right shaft side of the fertilizer pusher assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the left shaft side of the fertilizer pusher assembly of the present invention;

[0027] Figure 8 It is a front view of the fertilizer pusher assembly of the present invention;

[0028] Fig. 9 It is a side view of the fertilizer pusher assembly of the present invention;

[0029] Fig.10 A top view of the fertilizer pusher assembly of the present invention;

[0030] Fig.11 It is a schematic diagram of the left axle side of the fertilizer box assembly of the present invention;

[0031] Fig.12 It is a schematic diagram of the right axle side of the fertilizer box assembly of the present invention;

[0032] Fig.13 It is a schematic diagram of the structure of the spiral fertilizer feeder assembly of the present invention.

[0033] In the figure: 1. Fertilizer pusher assembly; 11. Left slide; 12. Support plate; 13. Fertilizer pusher plate; 14. Rack frame; 15. Right slide; 16. Gear support frame; 17. Gear; 18. Gear shaft; 2. Fertilizer box assembly; 21. Fertilizer inlet; 22. Connecting fixed plate; 23. Box body; 24. Fertilizer delivery pipe at the bottom of the box; 25. Oblique fertilizer delivery pipe; 26. Fertilizer feeder fixing plate; 3. Spiral fertilizer feeder assembly; 31. Driving motor; 32. Spiral rod fixing plate; 33. Connecting sleeve; 34. Spiral fertilizer delivery rod; 35. Sleeve connecting shaft; 36. Motor transmission shaft; 4. Small pulley; 5. Transmission belt; 6. Large pulley; 7. Zigzag support plate; 8. Universal joint; 9. Square and round connecting shaft. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-5In an embodiment of the present invention, a paste fertilizer fertilizing device with a self-cleaning fertilizer box is provided, which is installed on the rear working part of a rice transplanter and can be raised and lowered with the rice transplanting part to solve the problem of manual fertilization of paste fertilizer. The device comprises a fertilizer pusher assembly 1, a fertilizer box assembly 2, a screw fertilizer feeder assembly 3, a small pulley 4, a transmission belt 5, a large pulley 6, a Z-shaped support plate 7, a universal joint 8 and a square and round connecting shaft 9; wherein the fertilizer pusher assembly 1 is installed at the upper end of the fertilizer box assembly 2, a connecting fixing plate 23 is provided on one side of the fertilizer box assembly 2, and the fertilizer box assembly 2 is connected to the rear working part of the rice transplanter through the connecting fixing plate 23, and a box bottom fertilizer delivery pipe 24 is provided at the bottom of the fertilizer box assembly 2, and a box bottom fertilizer delivery pipe 24 is provided at the bottom of the box bottom. The fertilizer delivery pipe 24 is connected to the inclined fertilizer delivery pipe 25, and the upper end of the inclined fertilizer delivery pipe 25 is provided with a fertilizer feeder fixing plate 26, and the fertilizer feeder fixing plate 26 is used to connect the spiral fertilizer feeder assembly 3. A small pulley 4 is installed on the motor transmission shaft 36 of the spiral fertilizer feeder assembly 3, and the small pulley 4 is connected to the large pulley 6 through a transmission belt 5. The large pulley 6 is installed on the other side of the fertilizer box assembly 2 by a zigzag support plate 7, one end of the zigzag support plate 7 is fixed on the box body 23, and the other end is used to install the large pulley 6; the shaft end of the large pulley 6 is connected to the universal joint 8, and the universal joint 8 is connected to the gear shaft 18 on the fertilizer pusher assembly 1 through a square and round connecting shaft 9.

[0036] like Figure 6-13As shown, in the above embodiment, the fertilizer pusher assembly 1 is composed of a left slide 11 with a groove, a support plate 12, a fertilizer pusher plate 13, a rack frame 14, a right slide 15 with a groove, a gear support frame 16, a gear 17 and a gear shaft 18; the fertilizer pusher assembly 1 is fixed to the upper end of the fertilizer box assembly 2 through the support plate 12, the rack frame 14 is slidably connected to the left slide 11 and the right slide 15 on both sides of the support plate 12, the bottom of the rack frame 14 is fixedly connected to the fertilizer pusher plate 13, the inner side of the rack frame 14 is meshed with the gear 17, the rear end face of the gear 17 is connected to the gear shaft 18, the gear 17 is mounted on the gear support frame 16, and the gear support frame 16 is fixed on the support plate 12 The fertilizer box assembly 2 is composed of a fertilizer inlet 21, a connecting and fixing plate 22, a box body 23, a fertilizer delivery pipe 24 at the bottom of the box, an oblique fertilizer delivery pipe 25 and a fertilizer feeder fixing plate 26; the fertilizer inlet 21 is obliquely arranged on one side of the upper end of the box body 23, and a connecting and fixing plate 22 is fixed in the middle of one side of the box body 23. The cavity of the box body 23 is respectively connected with the fertilizer inlet 21, the fertilizer delivery pipe 24 at the bottom of the box, and the oblique fertilizer delivery pipe 25. The edge of the fertilizer pushing plate 13 is tightly fitted with the inner wall of the box body 23, and the paste fertilizer is pushed into the fertilizer delivery pipe 24 and the oblique fertilizer delivery pipe 25 at the bottom of the box body 23. Since the fertilizer pushing plate 13 is tightly matched with the box body 23, the inner wall of the box body 23 will not stick to the fertilizer, and self-cleaning is achieved. The spiral fertilizer feeder assembly 3 is composed of a driving motor 31, a spiral rod fixing plate 32, a connecting sleeve 33, a spiral fertilizer feeding rod 34, a sleeve connecting shaft 35 and a motor transmission shaft 36; the spiral fertilizer feeder assembly 3 is connected to the fertilizer feeder fixing plate 26 through the spiral rod fixing plate 32, the spiral fertilizer feeding rod 34 is arranged in the oblique fertilizer feeding pipe 25, and the end of the spiral fertilizer feeding rod 34 is installed in the connecting sleeve 33 through the sleeve connecting shaft 35 and is connected to the motor transmission shaft 36 of the driving motor 31. The driving motor 31 rotates synchronously to drive the spiral fertilizer feeding rod 34 and the small pulley 4 to move together.

[0037] How it works: See Figure 1-13The fertilizer pusher assembly 1 in the embodiment of the present invention is installed on the upper port of the fertilizer box assembly 2 through the support plate 12. When the gear 17 rotates, it drives the rack frame 14 to move in the grooves on the left slide 11 and the right slide 15. The lower end of the rack frame 14 is connected to the fertilizer pusher plate 13, and its movement can drive the fertilizer pusher plate 13 to move together; the fertilizer box assembly 2 is fixed to the rear working part of the rice transplanter by the connecting fixing plate 22, and the paste fertilizer can be added to the box body 23 through the fertilizer inlet 21. The fertilizer can be transported to the oblique fertilizer delivery pipe 25 through the box bottom fertilizer delivery pipe 24 at the bottom of the box body 23. The fertilizer delivery fixing plate 26 at the upper end of the oblique fertilizer delivery pipe 25 is connected to the spiral fertilizer delivery assembly 3; the spiral fertilizer delivery assembly 3 The spiral fertilizer delivery rod 34 is connected to the fertilizer delivery device fixing plate 26 through the spiral rod fixing plate 32, and is installed in the connecting sleeve 33 through the sleeve connecting shaft 35 and is connected to the motor transmission shaft 36 of the drive motor 31. The rotation of the drive motor 31 can drive the spiral fertilizer delivery rod 34 to move together, and the drive motor 31 can be clockwise (forward) or counterclockwise (reverse); a small pulley 4 is installed on the motor transmission shaft 36, and a transmission belt 5 is installed on the small pulley 4 and the large pulley 6. The large pulley 6 is installed on a zigzag support plate 7, and the zigzag support plate 7 is fixed to the side wall of the fertilizer box assembly 2. The shaft of the large pulley 6 is connected to the universal joint 8, and the universal joint 8 is connected to the gear shaft 18 through the square and round connecting shaft 9.

[0038] In order to further better explain the embodiment of the present invention, a method for applying paste fertilizer in a self-cleaning fertilizer box is also provided, which includes two steps:

[0039] S1: Adding fertilizer: The whole device is lifted up along with the working parts of the rice transplanter, so that the oblique fertilizer delivery pipe 25 is located above the mud layer, the driving motor 31 rotates clockwise, driving the small pulley 4 to rotate, the small pulley 4 drives the transmission belt 5 to rotate, the transmission belt 5 drives the large pulley 6 to rotate clockwise, and the gear shaft 18 is driven to rotate through the universal joint 8 and the square and round connecting shaft 9, the gear shaft 18 drives the gear 17 to rotate, the gear 17 drives the rack frame 14 to move upward in the grooves of the left slide 11 and the right slide 15, and the fertilizer pushing plate 13 connected to the lower end of the rack frame 14 moves upward together, and when the fertilizer pushing plate 13 moves to the upper plane of the box body 23, the driving motor 31 stops rotating, and at this time, the paste fertilizer is added into the box body 23 through the fertilizer inlet 21, and the fertilizer adding link is completed;

[0040] S2: Fertilization: After the fertilizer is added, the device descends with the working parts of the rice transplanter, the oblique fertilizer delivery pipe 25 is located in the mud layer, and the driving motor 31 rotates counterclockwise, driving the small pulley 4 and the large pulley 6 and the gear 17 to rotate through the transmission belt 5, so that the rack frame 14 moves downward, pushing the fertilizer pusher plate 13 to move downward together. The fertilizer pusher plate 13 is tightly matched with the box body 23 around, and the paste fertilizer is pushed into the fertilizer delivery pipe 24 and the oblique fertilizer delivery pipe 25 at the bottom of the fertilizer box. Since the fertilizer pusher plate 13 is tightly matched with the box body 23, the inner wall of the box body 23 will not stick to the fertilizer. To achieve self-cleaning, the drive motor 31 rotates counterclockwise and drives the sleeve connecting shaft 35 and the spiral fertilizer feeding rod 34 to rotate through the motor transmission shaft 36. The spiral blades on the spiral fertilizer feeding rod 34 push the paste fertilizer to move toward the lower end of the oblique fertilizer feeding pipe 25, discharge the paste fertilizer from the oblique fertilizer feeding pipe 25 and apply it to the mud layer. The device continues to work until all the fertilizers in the box body 23 are applied, and then the step of adding fertilizers is repeated; the amount of fertilizer pushed to the oblique fertilizer feeding pipe 25 by the fertilizer pushing plate 13 through the fertilizer feeding pipe 24 at the bottom of the box can be achieved by changing the transmission ratio by replacing the large pulley 6 or the small pulley 4 with different diameters.

[0041] In summary: the present invention provides a paste fertilizer fertilizing device and method for a self-cleaning fertilizer box. Aiming at the problem that the paste fertilizer is in liquid form but has low fluidity and is easy to stick to the box wall, a fertilizer pushing plate 13 close to the box wall driven by a gear rack mechanism is designed to force the fertilizer to be supplied to the spiral fertilizer feeder assembly 3, and the fertilizer is applied to the mud layer by the spiral fertilizer feeder assembly 3, thereby solving the problem of mechanized paste fertilizer application. The fertilizer pushing plate 13 close to the box wall will bring up the fertilizer stuck to the box wall, thereby realizing the self-cleaning function.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A paste fertilizer fertilizing device for a self-cleaning fertilizer box, characterized in that: The invention comprises a fertilizer pusher assembly (1), a fertilizer box assembly (2), a screw fertilizer delivery assembly (3), a small pulley (4), a transmission belt (5), a large pulley (6), a Z-shaped support plate (7), a universal joint (8) and a square-circle connecting shaft (9); the fertilizer pusher assembly (1) is installed at the upper end of the fertilizer box assembly (2); a connecting fixing plate (23) is provided on one side of the fertilizer box assembly (2) and is connected to the rear working part of the rice transplanter through the connecting fixing plate (23); a box bottom fertilizer delivery pipe (24) is provided at the bottom of the fertilizer box assembly (2); the box bottom fertilizer delivery pipe (24) is connected to an inclined fertilizer delivery pipe (25) arranged obliquely. The fertilizer feeding device (25) is connected to the fertilizer box assembly (2). The upper end of the oblique fertilizer feeding pipe (25) is provided with a fertilizer feeding device fixing plate (26). The fertilizer feeding device fixing plate (26) is used to connect the spiral fertilizer feeding device assembly (3). A small pulley (4) is installed on the motor transmission shaft (36) of the spiral fertilizer feeding device assembly (3). The small pulley (4) is connected to a large pulley (6) through a transmission belt (5). The large pulley (6) is installed on the other side of the fertilizer box assembly (2) through a zigzag support plate (7); the shaft end of the large pulley (6) is connected to a universal joint (8), and the universal joint (8) is connected to a gear shaft (18) on the fertilizer pusher assembly (1) through a square and round connection shaft (9).

2. The paste fertilizer fertilizing device for a self-cleaning fertilizer box according to claim 1, characterized in that: The fertilizer pusher assembly (1) is composed of a left slideway (11) with a groove, a support plate (12), a fertilizer pusher plate (13), a rack frame (14), a right slideway (15) with a groove, a gear support frame (16), a gear (17) and a gear shaft (18); the fertilizer pusher assembly (1) is fixed to the upper end of the fertilizer box assembly (2) through the support plate (12); the rack frame (14) is slidably connected to the left slideway (11) and the right slideway (15) on both sides of the support plate (12); the bottom of the rack frame (14) is fixedly connected to the fertilizer pusher plate (13); the inner side edge of the rack frame (14) is meshed with the gear (17); the rear end face of the gear (17) is connected to the gear shaft (18); the gear (17) is mounted on the gear support frame (16); and the gear support frame (16) is fixed to the support plate (12).

3. The paste fertilizer fertilizing device for a self-cleaning fertilizer box according to claim 2, characterized in that: The fertilizer box assembly (2) is composed of a fertilizer inlet (21), a connecting fixing plate (22), a box body (23), a fertilizer delivery pipe (24) at the bottom of the box, an oblique fertilizer delivery pipe (25) and a fertilizer delivery device fixing plate (26); the fertilizer inlet (21) is obliquely arranged on one side of the upper end of the box body (23), a connecting fixing plate (22) is fixed in the middle of one side of the box body (23), and the cavity of the box body (23) is respectively connected to the fertilizer inlet (21), the fertilizer delivery pipe (24) at the bottom of the box, and the oblique fertilizer delivery pipe (25).

4. The paste fertilizer fertilizing device for a self-cleaning fertilizer box according to claim 3, characterized in that: The edge of the fertilizer pushing plate (13) is tightly fitted to the inner wall of the box body (23).

5. The paste fertilizer fertilizing device for a self-cleaning fertilizer box according to claim 3, characterized in that: The screw fertilizer feeder assembly (3) is composed of a driving motor (31), a screw rod fixing plate (32), a connecting sleeve (33), a screw fertilizer feeding rod (34), a sleeve connecting shaft (35) and a motor transmission shaft (36); the screw fertilizer feeder assembly (3) is connected to the fertilizer feeder fixing plate (26) through the screw rod fixing plate (32); the screw fertilizer feeding rod (34) is arranged in the inclined fertilizer feeding pipe (25); the end of the screw fertilizer feeding rod (34) is installed in the connecting sleeve (33) through the sleeve connecting shaft (35) and is connected to the motor transmission shaft (36) of the driving motor (31); the driving motor (31) rotates synchronously to drive the screw fertilizer feeding rod (34) and the small pulley (4) to move together.

6. The paste fertilizer fertilizing device for a self-cleaning fertilizer box according to claim 3, characterized in that: One end of the zigzag support plate (7) is fixed on the box body (23), and the other end is used for mounting the large pulley (6).

7. A method for applying paste fertilizer to a self-cleaning fertilizer box, which is implemented based on the paste fertilizer applying device for a self-cleaning fertilizer box according to claim 5, characterized in that: The following steps are involved: S1: Adding fertilizer: The entire device is lifted along with the working parts of the rice transplanter so that the inclined fertilizer delivery pipe (25) is located above the mud layer, and the driving motor (31) rotates clockwise, driving the large pulley (6) to rotate clockwise through the small pulley (4) and the transmission belt (5), thereby driving the fertilizer pusher plate (13) in the fertilizer pusher assembly (1) to move to the upper plane of the box body (23), and the driving motor (31) stops rotating, and the paste fertilizer is added into the box body (23) through the fertilizer inlet (21), completing the fertilizer adding process; S2: Fertilization: After the fertilizer is added, the entire device descends with the working parts of the rice transplanter, the oblique fertilizer delivery pipe (25) is located in the mud layer, and the driving motor (31) rotates counterclockwise, driving the gear (17) to rotate through the small pulley (4), the transmission belt (5), the large pulley (6), the universal joint (8), the square and round connecting shaft (9), and the gear shaft (18), so that the gear support frame (16) moves downward, pushing the fertilizer pushing plate (13) to move downward together, and pushing the paste fertilizer into the box bottom fertilizer delivery pipe (24) and the oblique fertilizer delivery pipe (25) at the bottom of the box body (23); S3: The driving motor (31) rotates counterclockwise and drives the sleeve connecting shaft (35) and the spiral fertilizer delivery rod (34) to rotate through the motor transmission shaft (36). The spiral blades on the spiral fertilizer delivery rod (34) push the paste fertilizer to move toward the lower end of the inclined fertilizer delivery pipe (25), discharge the paste fertilizer from the inclined fertilizer delivery pipe (25) and apply it to the mud layer. The device continues to work until all the fertilizer in the box (23) is applied, and then repeats the step of adding fertilizer.

8. The method for applying paste fertilizer in a self-cleaning fertilizer box according to claim 7, characterized in that: The specific working process of the fertilizer pusher assembly (1) in S1 is as follows: the large pulley (6) drives the universal joint (8) and the square and round connecting shaft (9) to rotate, thereby driving the gear shaft (18) to rotate, the gear shaft (18) drives the gear (17) to rotate, the gear (17) drives the rack frame (14) to move upward in the grooves of the left slideway (11) and the right slideway (15), and the rack frame (14) drives the fertilizer pusher plate (13) to move upward.

9. The method for applying paste fertilizer in a self-cleaning fertilizer box according to claim 7, characterized in that: The amount of fertilizer pushed by the fertilizer pushing plate (13) in S2 to the oblique fertilizer delivery pipe (25) through the fertilizer delivery pipe (24) at the bottom of the box can be achieved by changing the transmission ratio by replacing the large pulley (6) or the small pulley (4) with different diameters.

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