Automatic proportion-adjustable polyurethane spraying device for spraying surface of fertilizer core

Abstract

The invention relates to the technical field of spraying devices, and discloses an automatic proportion-adjustable polyurethane spraying device for spraying the surface of a fertilizer core, the automatic proportion-adjustable polyurethane spraying device comprises a pressurizing assembly, a spraying assembly, a stirring assembly and a material distributing assembly, the pressurizing assembly is communicated with the spraying assembly, the stirring assembly is arranged at the bottom of the spraying assembly, and the material distributing assembly is arranged at the bottom of the spraying assembly. The material distributing assembly is arranged on one side of the stirring assembly, a flow air cylinder and a flow switch are arranged in the middle of the spraying assembly, the telescopic end of the flow air cylinder is hinged to the flow switch, a rotatable conveying belt frame is installed in the middle of the stirring assembly, and a conveying belt plate capable of rotating in a reciprocating mode is rotationally connected to the middle of the conveying belt frame. The problems that in the prior art, most spraying devices are of a single spraying structure, and automatic proportion switching for spraying and classification cannot be conducted are solved.

Description

Technical Field

[0001] The invention relates to the technical field of spraying devices, and more specifically, to an automatic spraying device for spraying polyurethane with an adjustable ratio on the surface of fertilizer cores. Background Art

[0002] The Chinese invention patent with publication number CN102816011B discloses a coloring agent for fertilizer and a method and device for slow-release coloring of granular fertilizer. The coloring agent for fertilizer is composed of 3-5 parts of dye, 12-20 parts of film-forming agent, 1-3 parts of dispersant, 130-160 parts of water, and 0-2 parts of emulsifier in weight. The method for slow-release coloring of granular fertilizer comprises: preparing the coloring agent according to the ratio; feeding the granular fertilizer to be colored into a rotating drum in a quantitative manner; spraying the coloring agent on the surface of the granular fertilizer, and the amount of the coloring agent is 0.02-0.3wt% of the weight of the granular fertilizer; the coloring agent is evenly distributed and diffused on the surface of the fertilizer particles to obtain a colored slow-release fertilizer. The present invention also provides a device for slow-release coloring of granular fertilizer. The fertilizer treated by the method of the present invention can slow down the release rate of quick-acting nutrients, effectively prevent the granular fertilizer from agglomerating, and the colored fertilizer has a smooth surface, bright color, and regular particles, thereby improving product quality.

[0003] The Chinese invention patent with publication number CN112939670A discloses a hydrophobic slow-release organic-inorganic compound fertilizer preparation device and preparation method, a hydrophobic slow-release organic-inorganic compound fertilizer preparation device, including an activation reactor, a feed channel I, a compounding tank, a buffer tank, a spray granulation dryer, and a feed channel II; the present invention forms a plurality of hydrophobic layer membranes in the fertilizer particles by coating with a hydrophobic agent, blocks the pores of the fertilizer particles, increases the surface wetting angle of the fertilizer particles, makes it difficult for moisture in the soil to wet the inside of the fertilizer particles, ensures that the inorganic nutrients soluble in water in the fertilizer are not leached, and realizes that only as the organic matter is gradually decomposed and utilized from the outside to the inside, the inorganic nutrients are gradually released from the outside to the inside, and through the hydrophobic slow-release organic-inorganic compound fertilizer, a plurality of nutrient ratios of slurry and multi-layer spray granulation can be used, and the fertilizer can have multiple nutrient ratios from the outside to the inside.

[0004] However, most of the spraying devices in the prior art are single spraying structures and cannot automatically switch the ratio for spraying and classification. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic polyurethane spraying device with adjustable ratio for spraying on the surface of fertilizer core, aiming to solve the problem that most spraying devices in the prior art are single spraying structures and cannot automatically switch ratios for spraying and classification.

[0006] The present invention is implemented as follows: an adjustable proportion polyurethane automatic spraying device for spraying the surface of a fertilizer core comprises a pressurizing component, a spraying component, a stirring component and a material dividing component, wherein the pressurizing component is connected to the spraying component, the stirring component is arranged at the bottom of the spraying component, the material dividing component is arranged at one side of the stirring component, a flow cylinder and a flow switch are arranged in the middle of the spraying component, the telescopic end of the flow cylinder is hinged to the flow switch, a rotatable conveyor belt frame is installed in the middle of the stirring component, and a reciprocating conveyor belt plate is rotatably connected in the middle of the conveyor belt frame.

[0007] The mixing assembly includes a mixing bin, a material dividing adjustment rail, a material dividing adjustment cylinder, a material dividing adjustment slider, a material dividing adjustment hinge rod and a material dividing adjustment hinge frame. The mixing bin is a top open frame structure. The material dividing adjustment rail is symmetrically arranged on both sides of the mixing bin. The material dividing adjustment cylinder is installed at one end of the material dividing adjustment rail. The material dividing adjustment slider is slidably connected to the middle part of the material dividing adjustment rail. The material dividing adjustment slider is connected to the telescopic end of the material dividing adjustment cylinder. The material dividing adjustment hinge frame is hinged on the side of the mixing bin away from the spraying assembly. The two ends of the material dividing adjustment hinge rod are respectively hinged on the material dividing adjustment slider and the material dividing adjustment hinge frame.

[0008] The stirring assembly also includes a stirring slide rail, a stirring cylinder, a stirring slider, a stirring shaft, a stirring deformation cylinder, a stirring support plate and a stirring spring bar. The stirring slide rail is symmetrically arranged on both sides of the inner wall of the stirring bin, the stirring cylinder is installed in the middle of the stirring slide rail, the stirring slider is slidingly connected to the middle of the stirring slide rail, the telescopic end of the stirring cylinder is connected to the stirring slider, the stirring shaft is rotatably connected to the stirring slider, the stirring deformation cylinder is installed on the stirring shaft, the stirring support plate is slidingly connected to the middle of the stirring shaft, and a plurality of stirring spring bars are detachably installed on the stirring support plate, the stirring spring bars are elastic spiral structures, and the stirring spring bars are deformed by changing the position of the stirring support plate through the stirring deformation cylinder.

[0009] The stirring assembly also includes a cleaning scraper, a cleaning ring, a cleaning connecting plate, a cleaning drive block and a cleaning screw. The cleaning scraper is slidably connected to the outer side of the stirring spring bar, the cleaning ring is slidably connected to the stirring shaft, the two ends of the cleaning connecting plate are respectively connected to the cleaning scraper and the cleaning ring, the cleaning drive block is connected to the cleaning ring through a support rod, the cleaning screw is placed in the middle of the stirring shaft, the cleaning drive block is threadedly connected to the cleaning screw, and a cleaning push plate is installed at the end of the cleaning drive block away from the cleaning scraper, and the cleaning push plate cleans the outer wall of the cleaning screw.

[0010] The stirring assembly also includes a conveying adjustment cylinder, a conveying adjustment rotating frame, a conveying adjustment rotating block, a conveying adjustment hinge rod and a conveying adjustment fixed block. The conveying adjustment fixed block is fixedly connected to the discharge port of the stirring bin. The conveying adjustment rotating frame is rotatably connected to the conveying adjustment fixed block. The conveying adjustment cylinder is installed in the middle of the conveying adjustment rotating frame. The telescopic end of the conveying adjustment cylinder is hinged to the conveying adjustment rotating block. The two conveying adjustment hinge rods are connected through the conveying adjustment rotating block. The non-hinged ends of the two conveying adjustment hinge rods are respectively hinged to the conveyor belt frame and the stirring bin.

[0011] The material distribution component comprises a plurality of material distribution trays, a retractable material distribution plate is provided in the middle of the material distribution tray, a material distribution cylinder is installed at the bottom of the material distribution tray, and the retractable end of the material distribution cylinder is connected to the material distribution plate.

[0012] The spraying assembly includes a spraying bracket, a spraying cylinder, a transverse cylinder, a spraying frame, a spraying hood and a plurality of spraying pipes. The spraying cylinder is installed on the spraying bracket, the telescopic end of the spraying cylinder is connected to the spraying frame, the spraying hood is installed at the bottom of the spraying frame, a plurality of spraying pipes are evenly spaced in the middle of the spraying hood, the transverse cylinder is connected to the spraying frame, and the transverse cylinder changes the transverse span of the spraying frame.

[0013] The pressurizing component is provided with a double-head plunger pump, and the double-head plunger pump is connected with the spraying component through a high-pressure nozzle.

[0014] It also includes a material storage component, which includes a material storage tank, a liquid charging bin and a charging connecting pipe. The material storage tank is connected to an external charging component through the charging connecting pipe, and the liquid charging bin is connected to the material storage tank.

[0015] The device also comprises a control cabinet, wherein a plurality of electronic components are arranged inside the control cabinet.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The pressurizing component provides stable pressure to the spraying component through a double-head plunger pump, ensuring uniform distribution and good adhesion of polyurethane during spraying. This design helps to reduce material waste and improve spraying quality. It can also adapt to different spraying needs and change the spraying effect by adjusting the pressure.

[0017] The design of the spraying assembly allows the lateral cylinder to adjust the lateral span of the spraying frame to accommodate fertilizer cores of different sizes. This flexibility enables the device to be widely used in products of various specifications, improving the scope of use and economic benefits of the equipment.

[0018] The design of the stirring deformation cylinder and stirring spring in the stirring assembly makes the stirring process more efficient and can quickly mix the spray materials of different components. This efficient stirring mechanism helps reduce the risk of uneven material mixing and improves the quality and durability of the spray layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The schematic diagram of the structure of the automatic spraying device of the fertilizer core surface with adjustable ratio polyurethane of the present invention (see FIG. Figure 1 ); Figure 2 The schematic diagram of the structure of the automatic spraying device of the fertilizer core surface with adjustable ratio polyurethane of the present invention (see FIG. Figure 2 ); Figure 3 for Figure 2 A partial enlarged view of the middle A area; Figure 4 for Figure 2 A partial enlarged view of the B area; Figure 5 It is a schematic diagram of the internal structure of the stirring assembly in the automatic spraying device of polyurethane with adjustable ratio for spraying on the surface of the fertilizer core of the present invention; Figure 6 for Figure 5 A partial enlarged view of the middle C area; Figure 7 for Figure 5 A partial enlarged view of the D part; Reference numerals: 1. Storage component; 2. Pressurizing component; 3. Spraying component; 4. Stirring component; 5. Distributing component; 6. Storage tank; 7. Liquid adding bin; 8. Feeding connecting pipe; 9. Control cabinet; 10. Double-head plunger pump; 13. Spraying bracket; 14. Spraying cylinder; 15. Horizontal cylinder; 16. Spraying rack; 19. Spraying hood; 20. Spraying pipe; 17. Flow cylinder; 18. Flow switch; 21. Stirring bin; 22. Distributing adjustment slide rail; 23. Distributing adjustment cylinder; 24. Distributing adjustment slider; 25. Distributing adjustment hinge rod; 26. Distributing adjustment hinge bracket; 27. Stirring rail; 28. Stirring cylinder; 29. ​​Stirring slider; 30. Stirring shaft; 31. Stirring deformation cylinder; 32. Stirring support plate; 33. Stirring spring bar; 34. Cleaning scraper; 35. Cleaning collar; 36. Cleaning connecting plate; 37. Cleaning drive block; 38. Cleaning screw; 41. Conveying adjustment rotating frame; 42. Conveying adjustment cylinder; 43. Conveying adjustment rotating block; 44. Conveying adjustment hinge rod; 39. Conveyor belt frame; 40. Conveyor belt plate; 45. Conveying adjustment fixed block; 46. Distributing plate; 47. Distributing plate; 48. Distributing cylinder. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0022] like Figure 1-7 As shown, the present invention provides an adjustable proportion polyurethane automatic spraying device for spraying on the surface of a fertilizer core, comprising a pressurizing component 2, a spraying component 3, a stirring component 4 and a material dividing component 5, the pressurizing component 2 is connected to the spraying component 3, the stirring component 4 is placed at the bottom of the spraying component 3, the material dividing component 5 is placed on one side of the stirring component 4, a flow cylinder 17 and a flow switch 18 are provided in the middle of the spraying component 3, the telescopic end of the flow cylinder 17 is hinged to the flow switch, a rotatable conveyor belt frame 39 is installed in the middle of the stirring component 4, a reciprocating conveyor belt plate 40 is rotatably connected to the middle of the conveyor belt frame 39, and the conveyor belt frame 39 is turned from an inclined position to a flat position after stirring is completed to convey materials.

[0023] The pressurizing component 2 provides a stable pressure to the spraying component 3 through the double-head plunger pump 10, ensuring the uniform distribution and good adhesion of the polyurethane during the spraying process. This design helps to reduce material waste and improve the spraying quality. At the same time, it can also adapt to different spraying requirements and change the spraying effect by adjusting the pressure.

[0024] The design of the spray assembly 3 allows the lateral cylinder 15 to adjust the lateral span of the spray frame 16 to accommodate fertilizer cores of different sizes. This flexibility enables the device to be widely used in products of various specifications, thereby improving the scope of use and economic benefits of the equipment.

[0025] The innovation of the stirring assembly 4 lies in its adjustable ratio design. Through the cooperation of the material distribution adjustment cylinder 23 and the material distribution adjustment slider 24, the material distribution amount can be accurately controlled to ensure uniform mixing of the spraying material. This precise control helps to improve the uniformity and adhesion of the spray layer, thereby improving the quality of the final product.

[0026] The stirring assembly 4 includes a stirring bin 21, a material dividing adjustment slide rail 22, a material dividing adjustment cylinder 23, a material dividing adjustment slider 24, a material dividing adjustment hinge rod 25 and a material dividing adjustment hinge frame 26. The stirring bin 21 is a top open frame structure. The material dividing adjustment slide rail 22 is symmetrically arranged on both sides of the stirring bin 21. The material dividing adjustment cylinder 23 is installed at one end of the material dividing adjustment slide rail 22. The material dividing adjustment slider 24 is slidably connected to the middle part of the material dividing adjustment slide rail 22. The material dividing adjustment slider 24 is connected to the telescopic end of the material dividing adjustment cylinder 23. The material dividing adjustment hinge frame 26 is hinged on the side of the stirring bin 21 away from the spraying assembly 3. The two ends of the material dividing adjustment hinge rod 25 are respectively hinged on the material dividing adjustment slider 24 and the material dividing adjustment hinge frame 26. A conveying device is provided in the middle part of the material dividing adjustment hinge frame 26.

[0027] The stirring assembly 4 also includes a stirring slide rail 27, a stirring cylinder 28, a stirring slider 29, a stirring shaft 30, a stirring deformation cylinder 31, a stirring support plate 32 and a stirring spring bar 33. The stirring slide rail 27 is symmetrically arranged on both sides of the inner wall of the stirring chamber 21, the stirring cylinder 28 is installed in the middle of the stirring slide rail 27, the stirring slider 29 is slidably connected to the middle of the stirring slide rail 27, the telescopic end of the stirring cylinder 28 is connected to the stirring slider 29, the stirring shaft 30 is rotatably connected to the stirring slider 29, the stirring deformation cylinder 31 is installed on the stirring shaft 30, the stirring support plate 32 is slidably connected to the middle of the stirring shaft 30, and a plurality of stirring spring bars 33 are detachably installed on the stirring support plate 32. The stirring spring bars 33 are elastic spiral structures. The stirring spring bars 33 are deformed by changing the position of the stirring support plate 32 through the stirring deformation cylinder 31.

[0028] The design of the stirring deformation cylinder 31 and the stirring spring bar 33 in the stirring assembly 4 makes the stirring process more efficient and can quickly mix the spray materials of different components. This efficient stirring mechanism helps to reduce the risk of uneven material mixing and improve the quality and durability of the spray layer.

[0029] The stirring assembly 4 also includes a cleaning scraper 34, a cleaning ring 35, a cleaning connecting plate 36, a cleaning drive block 37 and a cleaning screw 38. The cleaning scraper 34 is slidably connected to the outer side of the stirring spring bar 33, the cleaning ring 35 is slidably connected to the stirring shaft 30, the two ends of the cleaning connecting plate 36 are respectively connected to the cleaning scraper 34 and the cleaning ring 35, the cleaning drive block 37 is connected to the cleaning ring 35 through a support rod, the cleaning screw 38 is placed in the middle of the stirring shaft 30, the cleaning drive block 37 is threadedly connected to the cleaning screw 38, and a cleaning push plate is installed at the end of the cleaning drive block 37 away from the cleaning scraper 34, and the cleaning push plate cleans the outer wall of the cleaning screw 38.

[0030] The design of the cleaning assembly, including the cleaning scraper 34, the cleaning collar 35 and the cleaning drive block 37, ensures the cleanliness of the interior of the mixing chamber 21 and prevents residues from affecting the quality of the material being mixed next time. This self-cleaning function reduces the need for manual cleaning and improves production efficiency and the convenience of equipment maintenance.

[0031] The stirring assembly 4 also includes a conveying adjustment cylinder 42, a conveying adjustment rotating frame 41, a conveying adjustment rotating block 43, a conveying adjustment hinge rod 44 and a conveying adjustment fixed block 45. The conveying adjustment fixed block 45 is fixedly connected to the discharge port of the stirring bin 21. The conveying adjustment rotating frame 41 is rotatably connected to the conveying adjustment fixed block 45. The conveying adjustment cylinder 42 is installed in the middle of the conveying adjustment rotating frame 41. The telescopic end of the conveying adjustment cylinder 42 is hinged to the conveying adjustment rotating block 43. The two conveying adjustment hinge rods 44 are connected through the conveying adjustment rotating block 43. The non-hinged ends of the two conveying adjustment hinge rods 44 are respectively hinged to the conveyor belt frame 39 and the stirring bin 21.

[0032] The design of the conveyor adjustment cylinder 42 and the conveyor adjustment rotating frame 41 allows the conveyor belt frame 39 to adjust its position as needed to accommodate fertilizer cores of different shapes and sizes. This adjustment capability improves the adaptability and flexibility of the device, enabling it to handle products of various sizes.

[0033] The material distribution assembly 5 includes a plurality of material distribution trays 46 , a retractable material distribution plate 47 is provided in the middle of the material distribution tray 46 , a material distribution cylinder 48 is installed at the bottom of the material distribution tray 46 , and the retractable end of the material distribution cylinder 48 is connected to the material distribution plate 47 .

[0034] The design of the material distribution plate 46 and the material distribution cylinder 48 in the material distribution assembly 5 allows accurate control of the expansion and contraction of the material distribution plate 47, thereby achieving accurate distribution of the spray material on the surface of the fertilizer core. This precise material distribution mechanism helps to ensure the uniformity and consistency of the spray layer and improve the quality and appearance of the product.

[0035] The spray assembly 3 includes a spray bracket 13, a spray cylinder 14, a transverse cylinder 15, a spray frame 16, a spray hood 19 and multiple spray pipes 20. The spray cylinder 14 is installed on the spray bracket 13, the telescopic end of the spray cylinder 14 is connected to the spray frame 16, the spray hood 19 is installed at the bottom of the spray frame 16, and multiple spray pipes 20 are evenly spaced in the middle of the spray hood 19. The transverse cylinder 15 is connected to the spray frame 16, and the transverse cylinder 15 changes the transverse span of the spray frame 16 for spraying.

[0036] The design of the spraying support 13 and the spraying cylinder 14 enables the spraying frame 16 to perform the spraying operation stably, while the design of the spraying hood 19 and the spraying pipe 20 ensures the uniform distribution of the spraying material. This stable spraying mechanism helps to improve the spraying efficiency and quality and reduce material waste.

[0037] The pressurizing component 2 is provided with a double-head plunger pump 10, and the double-head plunger pump 10 is connected with the spraying component 3 through a high-pressure nozzle.

[0038] The design of the material storage assembly 1, including the material storage tank 6, the liquid charging bin 7 and the charging connecting pipe 8, provides a stable material supply system for the spraying device. This design ensures the continuous supply of materials during the spraying process and reduces production interruptions caused by material shortages.

[0039] It also includes a material storage component 1, which includes a material storage tank 6, a liquid charging bin 7 and a charging connecting pipe 8. The material storage tank 6 is connected to an external charging component through the charging connecting pipe 8, and the liquid charging bin 7 is connected to the material storage tank 6.

[0040] It also includes a control cabinet 9, in which a plurality of electronic components are arranged.

[0041] The multiple electronic components inside the control cabinet 9 provide precise control and monitoring for the entire spraying device. This intelligent control system helps to realize automated production, improve production efficiency, and reduce the possibility of human error.

[0042] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] As shown in the drawings, a preferred embodiment of the present invention is provided.

[0044] The working principle of the present invention is: Preparation stage: Load the spraying material through the storage tank 6 and the liquid filling tank 7 of the storage component 1, and ensure that all components are installed correctly.

[0045] Start the pressurizing component 2: turn on the double-head plunger pump 10 to provide high-pressure spraying material to the spraying component 3.

[0046] Adjust the spraying parameters: According to the size of the fertilizer core and the spraying requirements, the lateral span of the spraying frame 16 is adjusted by the lateral cylinder 15, and the flow rate of the spraying material is adjusted by the flow cylinder 17 and the flow switch 18.

[0047] Stirring materials: Start the stirring assembly 4, and accurately divide and stir the materials through the material dividing and regulating cylinder 23 and the stirring cylinder 28 to ensure uniform mixing of the spraying materials.

[0048] Cleaning the mixing chamber: After each stirring, start the cleaning component to clean the inner wall of the mixing chamber through the cleaning scraper 34 and the cleaning drive block 37.

[0049] Adjust the conveyor belt: According to the size of the fertilizer core, adjust the position of the conveyor belt frame 39 through the conveyor adjustment cylinder 42 and the conveyor adjustment rotating frame 41.

[0050] Material separation operation: start the material separation component 5, control the expansion and contraction of the material separation plate 47 through the material separation cylinder 48, perform accurate material separation, and separate fertilizers with different spraying thicknesses.

[0051] Spraying operation: Place the fertilizer core on the conveyor belt and start the spraying assembly 3 to perform the spraying operation.

[0052] Monitoring and adjustment: The entire spraying process is monitored through the control cabinet 9, and various parameters are adjusted as needed to ensure the spraying quality.

[0053] Finished spraying: After a uniform polyurethane coating is formed on the surface of the fertilizer core, the equipment is closed for subsequent curing and packaging processes.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable ratio polyurethane automatic spraying device for spraying fertilizer core surface, characterized in that: The invention comprises a pressurizing component (2), a spraying component (3), a stirring component (4) and a material dividing component (5), wherein the pressurizing component (2) is connected to the spraying component (3), the stirring component (4) is arranged at the bottom of the spraying component (3), the material dividing component (5) is arranged at one side of the stirring component (4), a flow cylinder (17) and a flow switch (18) are arranged in the middle of the spraying component (3), the telescopic end of the flow cylinder (17) is hinged to the flow switch (18), a rotatable conveyor belt frame (39) is installed in the middle of the stirring component (4), and a reciprocating conveyor belt plate (40) is rotatably connected to the middle of the conveyor belt frame (39).

2. The adjustable ratio polyurethane automatic spraying device for fertilizer core surface spraying according to claim 1 is characterized in that: The stirring assembly (4) comprises a stirring chamber (21), a material distribution adjustment slide rail (22), a material distribution adjustment cylinder (23), a material distribution adjustment slider (24), a material distribution adjustment hinge rod (25) and a material distribution adjustment hinge frame (26); the stirring chamber (21) is a top open frame structure; the material distribution adjustment slide rail (22) is symmetrically arranged on both sides of the stirring chamber (21); the material distribution adjustment cylinder (23) is installed on one end of the material distribution adjustment slide rail (22); the material distribution adjustment slider (24) is slidably connected to the middle part of the material distribution adjustment slide rail (22); the material distribution adjustment slider (24) is connected to the telescopic end of the material distribution adjustment cylinder (23); the material distribution adjustment hinge frame (26) is hinged to a side of the stirring chamber (21) away from the spraying assembly (3); and the two ends of the material distribution adjustment hinge rod (25) are respectively hinged to the material distribution adjustment slider (24) and the material distribution adjustment hinge frame (26).

3. The adjustable ratio polyurethane automatic spraying device for spraying the fertilizer core surface according to claim 2 is characterized in that: The stirring assembly (4) further comprises a stirring rail (27), a stirring cylinder (28), a stirring slider (29), a stirring rotating shaft (30), a stirring deformation cylinder (31), a stirring support plate (32) and a stirring spring bar (33), wherein the stirring rail (27) is symmetrically arranged on both sides of the inner wall of the stirring chamber (21), the stirring cylinder (28) is installed in the middle of the stirring rail (27), the stirring slider (29) is slidably connected to the middle of the stirring rail (27), and the telescopic end of the stirring cylinder (28) is connected to the stirring slider ( 29), the stirring shaft (30) is rotatably connected to the stirring slider (29), the stirring deformation cylinder (31) is installed on the stirring shaft (30), the stirring support plate (32) is slidably connected to the middle of the stirring shaft (30), and a plurality of stirring spring bars (33) are detachably installed on the stirring support plate (32), the stirring spring bars (33) are elastic spiral structures, and the stirring spring bars (33) are deformed by changing the position of the stirring support plate (32) through the stirring deformation cylinder (31).

4. The adjustable ratio polyurethane automatic spraying device for spraying the fertilizer core surface according to claim 3 is characterized in that: The stirring assembly (4) further comprises a cleaning scraper (34), a cleaning collar (35), a cleaning connecting plate (36), a cleaning driving block (37) and a cleaning screw (38); the cleaning scraper (34) is slidably connected to the outer side of the stirring spring bar (33); the cleaning collar (35) is slidably connected to the stirring shaft (30); two ends of the cleaning connecting plate (36) are respectively connected to the cleaning scraper (34) and the cleaning collar (35); the cleaning driving block (37) is connected to the cleaning collar (35) via a supporting rod; the cleaning screw (38) is disposed in the middle of the stirring shaft (30); the cleaning driving block (37) is threadedly connected to the cleaning screw (38); a cleaning push plate is installed at one end of the cleaning driving block (37) away from the cleaning scraper (34); the cleaning push plate cleans the outer wall of the cleaning screw (38).

5. The adjustable ratio polyurethane automatic spraying device for spraying the fertilizer core surface according to claim 4 is characterized in that: The stirring assembly (4) further comprises a conveying adjustment cylinder (42), a conveying adjustment rotating frame (41), a conveying adjustment rotating block (43), a conveying adjustment hinge rod (44) and a conveying adjustment fixed block (45); the conveying adjustment fixed block (45) is fixedly connected to the discharge port of the stirring bin (21); the conveying adjustment rotating frame (41) is rotatably connected to the conveying adjustment fixed block (45); the conveying adjustment cylinder (42) is mounted in the middle of the conveying adjustment rotating frame (41); the telescopic end of the conveying adjustment cylinder (42) is hinged to the conveying adjustment rotating block (43); the two conveying adjustment hinge rods (44) are connected through the conveying adjustment rotating block (43); and the non-hinged ends of the two conveying adjustment hinge rods (44) are respectively hinged to the conveyor belt frame (39) and the stirring bin (21).

6. The automatic spraying device for spraying fertilizer core surface with adjustable ratio polyurethane according to claim 5, characterized in that: The material distribution assembly (5) comprises a plurality of material distribution trays (46), a retractable material distribution plate (47) is provided in the middle of the material distribution tray (46), a material distribution cylinder (48) is installed at the bottom of the material distribution tray (46), and the retractable end of the material distribution cylinder (48) is connected to the material distribution plate (47).

7. The automatic spraying device of polyurethane with adjustable ratio for spraying on the surface of fertilizer core according to claim 6, characterized in that: The spraying assembly (3) comprises a spraying support (13), a spraying cylinder (14), a transverse cylinder (15), a spraying frame (16), a spraying hood (19) and a plurality of spraying pipes (20); the spraying cylinder (14) is mounted on the spraying support (13); the telescopic end of the spraying cylinder (14) is connected to the spraying frame (16); the spraying hood (19) is mounted on the bottom of the spraying frame (16); a plurality of spraying pipes (20) are evenly spaced in the middle of the spraying hood (19); the transverse cylinder (15) is connected to the spraying frame (16); and the transverse cylinder (15) changes the transverse span of the spraying frame (16).

8. The automatic spraying device for spraying fertilizer core surface with adjustable ratio polyurethane according to claim 7, characterized in that: The pressurizing component (2) is provided with a double-headed plunger pump (10), and the double-headed plunger pump (10) is connected to the spraying component (3) through a high-pressure nozzle.

9. The automatic spraying device of polyurethane with adjustable ratio for spraying on the surface of fertilizer core according to claim 8, characterized in that: The invention also comprises a material storage component (1), wherein the material storage component (1) comprises a material storage tank (6), a liquid charging bin (7) and a charging connecting pipe (8), wherein the material storage tank (6) is connected to an external charging component via the charging connecting pipe (8), and the liquid charging bin (7) is connected to the material storage tank (6).

10. The automatic spraying device of polyurethane with adjustable ratio for spraying on the surface of fertilizer core according to claim 9, characterized in that: It also includes a control cabinet (9), wherein a plurality of electronic components are arranged inside the control cabinet (9).

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