A coating device for slow-release fertilizer production

Abstract

The utility model discloses a kind of film coating devices for slow-release fertilizer production, including coating machine, and coating machine includes support frame and rolling barrel, further include liquid storage tank, water suction pump, water outlet pipe, spray pipe, spraying part and adjusting mechanism, liquid storage tank is set at the side of support frame, water suction pump is set at the side of liquid storage tank, the input end of water suction pump is communicated with liquid storage tank, one end of water outlet pipe is communicated with the output end of water suction pump, one end of spray pipe is communicated with the other end of water outlet pipe by swivel joint, spray pipe is rotationally arranged in rolling barrel by rotating part, multiple spraying parts are arranged on spray pipe, for spraying film coating agent to rolling barrel, adjusting mechanism is set on spray pipe, for adjusting the spraying rate of multiple spraying parts. The film coating device for slow-release fertilizer production is used to solve the problem that the existing technology uses fixed spray head spraying in the background art, which can cause some particles to be difficult to fully contact the film coating agent, and the film coating thickness is not uniform.

Description

Technical Field

[0001] This utility model relates to the field of coating device technology, specifically to a coating device for controlled-release fertilizer production. Background Technology

[0002] Slow-release fertilizers refer to fertilizers that release nutrients slowly at first through various regulatory mechanisms, extending the effective period for crops to absorb and utilize the nutrients. In the production of slow-release fertilizers, coating technology is the "bridge" from concept to practical application. Coating refers to coating the surface of water-soluble fertilizer particles with a semi-permeable or insoluble film, thereby giving the fertilizer the characteristic of slow-release nutrient release.

[0003] In existing technologies, roller coating machines are commonly used to coat fertilizers. The process generally involves fertilizer granules entering the roller and undergoing a "throwing-tumbling" motion inside. A spray system atomizes the coating agent and sprays the coating agent droplets onto the granule surface. Subsequently, hot air penetrates the material layer to accelerate solvent evaporation, causing the coating agent to solidify into a film. Finally, the coated fertilizer granules are discharged from the outlet. However, this coating machine still has defects. For example, the use of fixed nozzles inside the roller may create "dead corners" (such as the roller edge or granule accumulation areas), making it difficult for some granules to fully contact the coating agent, resulting in uneven coating thickness. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a coating device for the production of controlled-release fertilizers, thereby solving the problem mentioned in the background art that the existing technology uses fixed nozzles for spraying, which may result in some particles not being able to fully contact the coating agent and the coating thickness being uneven.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a coating device for controlled-release fertilizer production, comprising a coating machine, the coating machine including a support frame and a roller, the roller being rotatably mounted on the support frame via a rotating mechanism, and further including a storage tank, a water pump, a water outlet pipe, a spray pipe, spraying components, and an adjusting mechanism. The storage tank is located on one side of the support frame, the water pump is located on one side of the storage tank, the input end of the water pump is connected to the storage tank, one end of the water outlet pipe is connected to the output end of the water pump, one end of the spray pipe is connected to the other end of the water outlet pipe via a rotary joint, the spray pipe is rotatably mounted inside the roller via a rotating component, and multiple spraying components are provided on the spray pipe for spraying coating agent into the roller. The adjusting mechanism is located on the spray pipe for adjusting the spraying rate of the multiple spraying components.

[0008] Furthermore, the rotating component includes a vertical plate, a horizontal plate, and a first motor. One end of the vertical plate is fixedly connected to one end of the support frame, one end of the horizontal plate is fixedly connected to the other end of the vertical plate, and the other end of the spray pipe is rotatably connected to the other end of the horizontal plate. The first motor is mounted on the horizontal plate, and the output end of the first motor is coaxially fixedly connected to the other end of the spray pipe.

[0009] Furthermore, the spraying component includes a connecting pipe, a water collecting pipe, and multiple atomizing nozzles. One end of the connecting pipe is connected to the bottom end of the spraying pipe, and the middle part of the water collecting pipe is connected to the other end of the connecting pipe. The multiple atomizing nozzles are evenly distributed and are all connected to the water collecting pipe.

[0010] As a further embodiment of this solution, the adjusting mechanism includes a conical block, a push rod, a sleeve, a waterproof cover, and an electric cylinder. The conical block is located inside the spray pipe and slides against the inner wall of the connecting pipe. One end of the push rod is fixedly connected to one end of the conical block, and the other end extends through the spray pipe. One end of the sleeve is connected to the top of the spray pipe, and the other end of the push rod is located inside the sleeve. The waterproof cover is fixedly connected to the spray pipe, and the electric cylinder is installed on the inner top wall of the waterproof cover. The output end of the electric cylinder is fixedly connected to the other end of the push rod.

[0011] As a further step in this solution, an infrared sensor is installed on the water collection pipe to detect the height distribution of particle accumulation inside the drum.

[0012] Based on the aforementioned scheme, a rubber ring is fitted on the outer wall of the push rod, and the rubber ring slides in conjunction with the inner wall of the sleeve.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a coating device for the production of controlled-release fertilizers, which has the following beneficial effects:

[0015] Through the coordination of the storage tank, water pump, water outlet pipe, spray pipe, rotating parts, spraying parts and adjusting mechanism, the coating agent in the storage tank is transferred out of the storage tank by the water pump and sequentially transferred to multiple atomizing nozzles through the water outlet pipe, spray pipe, connecting pipe and water collection pipe. The coating agent is then sprayed onto the fertilizer granules in the drum. The spray pipe is driven by the first motor to repeatedly "oscillate", which can cover most of the fertilizer in the drum and spray the fertilizer fully and evenly.

[0016] By using multiple infrared sensors to detect the thickness of fertilizer inside the drum, the output of the electric cylinder is controlled to drive the push rod and the rubber ring fitted on the push rod to move inside the sleeve. The spraying rate of fertilizer at each position can be adjusted according to the thickness of fertilizer accumulation at each position inside the drum, which can save the use of coating agent. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure in a preferred embodiment of this application;

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the whole from another perspective in a preferred embodiment of this application;

[0019] Figure 3 This is a partial cross-sectional perspective view of the present invention in a preferred embodiment of this application;

[0020] Figure 4 In a preferred embodiment of this application Figure 3 A magnified schematic diagram of the partial structure at point A in the middle;

[0021] Figure 5 This is a partial cross-sectional perspective view of the three-dimensional structure of the adjustment mechanism and the spray pipe in a preferred embodiment of this application;

[0022] Figure 6 This is a three-dimensional structural diagram of the coating machine in a preferred embodiment of this application;

[0023] Figure 7 This is a three-dimensional structural diagram of the spray pipe after rotation in a preferred embodiment of this application.

[0024] In the diagram: 1. Coating machine; 2. Support frame; 3. Roller; 4. Rotating mechanism; 5. Liquid storage tank; 6. Water pump; 7. Water outlet pipe; 8. Spray pipe; 9. Rotary joint; 10. Vertical plate; 11. Horizontal plate; 12. First motor; 13. Connecting pipe; 14. Water collection pipe; 15. Atomizing nozzle; 16. Conical block; 17. Push rod; 18. Sleeve; 19. Waterproof cover; 20. Electric cylinder; 21. Infrared sensor; 22. Rubber ring; 23. Fixing frame. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example

[0027] Please see Figures 1 to 7 A coating device for the production of controlled-release fertilizer includes a coating machine 1, which includes a support frame 2 and a roller 3. The roller 3 is rotatably mounted on the support frame 2 via a rotating mechanism 4. The device also includes a storage tank 5, a water pump 6, a water outlet pipe 7, a spray pipe 8, a spraying component, and an adjustment mechanism.

[0028] like Figure 1 and Figure 2 As shown, the storage tank 5 is located on one side of the support frame 2, and the water pump 6 is located on one side of the storage tank 5. The input end of the water pump 6 is connected to the storage tank 5. A placement rack is provided on one side of the support frame 2. The storage tank 5 and the water pump 6 are both installed on the placement rack. One end of the outlet pipe 7 is connected to the output end of the water pump 6. The storage tank 5 is connected to the input end of the water pump 6 through a pipe. The outlet pipe 7 is Z-shaped. The other end of the outlet pipe 7 faces the roller 3 and is located in the upper middle part of the roller 3. One end of the spray pipe 8 is connected to the other end of the outlet pipe 7 through a rotary joint 9. By starting the water pump 6, the coating agent in the storage tank 5 is transferred out of the storage tank 5 and moved into the outlet pipe 7 by the drive of the water pump 6.

[0029] like Figure 3 and Figure 7 As shown, the spray pipe 8 is rotatably mounted inside the drum 3 via a rotating component. The rotating component includes a vertical plate 10, a horizontal plate 11, and a first motor 12. One end of the vertical plate 10 is fixedly connected to one end of the support frame 2, and one end of the horizontal plate 11 is fixedly connected to the other end of the vertical plate 10. The other end of the spray pipe 8 is rotatably connected to the other end of the horizontal plate 11. The first motor 12 is mounted on the horizontal plate 11, and the output end of the first motor 12 is coaxially fixedly connected to the other end of the spray pipe 8. By starting the first motor 12, the output end of the first motor 12 rotates, driving the spray pipe 8 to rotate. The first motor 12 is a forward and reverse reversible motor, which can drive the spray pipe 8 to repeatedly "swing".

[0030] like Figure 4 and Figure 7 As shown, the spray pipe 8 is equipped with multiple spray components for spraying the coating agent into the drum 3. The spray components include a connecting pipe 13, a water collection pipe 14, and multiple atomizing nozzles 15. One end of the connecting pipe 13 is connected to the bottom end of the spray pipe 8, and the middle part of the water collection pipe 14 is connected to the other end of the connecting pipe 13. The multiple atomizing nozzles 15 are evenly distributed and are all connected to the water collection pipe 14. The water pump 6 drives the coating agent to pass through the water outlet pipe 7 and the spray pipe 8 in sequence, and then enters the multiple connecting pipes 13. After entering the water collection pipe 14 through the connecting pipes 13, it is placed in the atomizing nozzles 15 and sprayed towards the drum 3.

[0031] It should be added that multiple atomizing nozzles 15 are evenly arranged to cover the fertilizer granules inside the drum 3.

[0032] like Figure 4 and Figure 5 As shown, an adjustment mechanism is installed on the spray pipe 8 to adjust the spray rate of multiple spray elements. The adjustment mechanism includes a conical block 16, a push rod 17, a sleeve 18, a waterproof cover 19, and an electric cylinder 20. The conical block 16 is located inside the spray pipe 8 and slides against the inner wall of the connecting pipe 13. One end of the push rod 17 is fixedly connected to one end of the conical block 16, and the other end passes through the spray pipe 8 and extends outward. One end of the sleeve 18 is connected to the top of the spray pipe 8, and the other end of the push rod 17 is located inside the sleeve 18. A rubber ring 22 is fitted on the outer wall of the push rod 17, and the rubber ring 22 slides against the inner wall of the sleeve 18. The waterproof cover 19 is fixedly connected to the spray pipe 8. The electric cylinder 20 is installed on the inner top wall of the waterproof cover 19, and the output end of the electric cylinder 20 is fixedly connected to the other end of the push rod 17. The water collection pipe 1... An infrared sensor 21 is installed on the roller 4. A controller matching the infrared sensor 21 is installed inside the electric cylinder 20. The controller and the electric cylinder 20 are electrically connected to detect the height distribution of the granules inside the roller. The thickness of the fertilizer inside the roller 3 is detected by the infrared sensor 21. The output end of the electric cylinder 20 is controlled to drive the push rod 17 and the rubber ring 22 fitted on the push rod 17 to move inside the sleeve 18. The rubber ring 22 is waterproof to prevent the coating agent from overflowing. The push rod 17 drives the conical block 16 to move inside the connecting pipe 13. The conical block 16 moves closer to the water collection pipe 14, so the water inlet rate in the water collection pipe 14 decreases. Correspondingly, the spray volume of the multiple atomizing nozzles 15 decreases. When the conical block 16 is completely removed from the connecting pipe 13, the water inlet space of the connecting pipe 13 is maximized.

[0033] It should be further explained that the first motor 12 and infrared sensor 21 in this embodiment are conventional devices known to those skilled in the art and available on the market. The model can be selected or customized according to actual needs. In this patent, we only use them without improving their structure and function. The setting method, installation method and electrical connection method can be debugged and operated by those skilled in the art according to the requirements of the instruction manual, and will not be described in detail here. The first motor 12 is equipped with a matching control switch. The installation position of the control switch can be selected according to the actual use requirements to facilitate the operation and control by the operator. At the same time, the motor needs to be connected to the forward and reverse circuit before use for forward and reverse operation. As for the forward and reverse use of the motor, according to the patent disclosed in patent number CN109889124A, the forward and reverse operation of the motor is a well-known technology to those skilled in the art, and the technology is very mature and can be implemented.

[0034] Working Principle: This controlled-release fertilizer coating device, when coating fertilizer, places the coated fertilizer into a drum 3. Due to the inclination angle between the drum and the support frame 2, the drum rotates under the drive of the rotating mechanism 4, causing the fertilizer granules to rotate and move. The water pump 6 is activated, and the coating agent in the storage tank 5 is transferred out of the storage tank 5 by the water pump 6, sequentially through the outlet pipe 7, spray pipe 8, connecting pipe 13, and collecting pipe 14 to multiple atomizing nozzles 15, spraying the coating agent towards the fertilizer granules in the drum 3. The first motor 12 is activated, and its output rotates, driving the spray pipe 8 to rotate, thus driving... The spray pipe 8 repeatedly "oscillates," covering most of the fertilizer inside the drum 3. As the fertilizer particles move within the drum, multiple infrared sensors 21 detect the thickness of the fertilizer inside the drum 3, controlling the output of the electric cylinder 20 to move the push rod 17 and the rubber ring 22 fitted on the push rod 17 within the sleeve 18. The rubber ring 22 is waterproof to prevent the coating agent from overflowing. The push rod 17 moves the conical block 16 within the connecting pipe 13, thus ensuring thorough and uniform spraying of the fertilizer. Furthermore, the spraying rate of the fertilizer at each location can be adjusted according to the thickness of the fertilizer accumulation at each position within the drum 3, saving on the use of coating agent.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coating device for controlled-release fertilizer production, comprising a coating machine (1), the coating machine (1) comprising a support frame (2) and a roller (3), the roller (3) being rotatably mounted on the support frame (2) via a rotating mechanism (4), characterized in that, Also includes: A liquid storage tank (5) is disposed on one side of the support frame (2); A water pump (6) is provided on one side of the liquid storage tank (5), and the input end of the water pump (6) is connected to the liquid storage tank (5). Water outlet pipe (7), one end of which is connected to the output end of the water pump (6); Spray pipe (8), one end of the spray pipe (8) is connected to the other end of the water outlet pipe (7) through a rotary joint (9), and the spray pipe (8) is rotatably installed in the drum (3) through a rotating component; Spraying components, a plurality of spraying components are provided on the spray pipe (8) for spraying coating agent into the roller (3); An adjustment mechanism is provided on the spray pipe (8) for adjusting the spray rate of the plurality of spray elements.

2. The coating device for controlled-release fertilizer production according to claim 1, characterized in that, The rotating component includes: A vertical plate (10), one end of which is fixedly connected to one end of the support frame (2); A horizontal plate (11) is fixedly connected at one end to the other end of the vertical plate (10), and the other end of the spray pipe (8) is rotatably connected to the other end of the horizontal plate (11). The first motor (12) is mounted on the horizontal plate (11), and the output end of the first motor (12) is coaxially fixedly connected to the other end of the spray pipe (8).

3. The coating device for controlled-release fertilizer production according to claim 2, characterized in that, The spray component includes: A connecting pipe (13), one end of which is connected to the bottom end of the spray pipe (8); A water collection pipe (14) is connected in the middle to the other end of the connecting pipe (13); Multiple atomizing nozzles (15) are evenly distributed and all are connected to the water collection pipe (14).

4. The coating device for controlled-release fertilizer production according to claim 3, characterized in that, The adjustment mechanism includes: A conical block (16) is located inside the spray pipe (8) and slides against the inner wall of the connecting pipe (13); Push rod (17), one end of which is fixedly connected to one end of the cone block (16), and the other end passes through the spray pipe (8) and extends therefrom; Sleeve (18), one end of which is connected to the top end of the spray pipe (8), and the other end of the push rod (17) is inside the sleeve (18); Waterproof cover (19), which is fixedly connected to the spray pipe (8); An electric cylinder (20) is installed on the inner top wall of the waterproof cover (19), and the output end of the electric cylinder (20) is fixedly connected to the other end of the push rod (17).

5. A coating device for controlled-release fertilizer production according to claim 3, characterized in that, An infrared sensor (21) is installed on the water collection pipe (14) to detect the height distribution of particles accumulated inside the drum.

6. A coating device for controlled-release fertilizer production according to claim 4, characterized in that, A rubber ring (22) is fitted on the outer wall of the push rod (17), and the rubber ring (22) slides in contact with the inner wall of the sleeve (18).

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