Seed coating device

Abstract

The utility model belongs to the technical field of seed coating, particularly relates to a seed coating device, and provides the following scheme aiming at the problems of poor coating uniformity, easiness in seed breakage and low liquid medicine utilization rate of the conventional seed coating machine: the seed coating device comprises an atomizing coating tank, a stirring coating cylinder, a feeding hopper, a material shifting pipe and a spiral feeding pipe. According to the utility model, seeds can be continuously and controllably conveyed; a unique concave disc body and a seed throwing disc with a plurality of groups of stepped staggered grooves are arranged in the tank, so that the seeds are efficiently and uniformly dispersed; meanwhile, a two-stage atomization pipe is arranged, and two-stage fine atomization of liquid medicine is achieved through an air flow cavity, a liquid medicine cavity, an annular air flow channel and an annular liquid medicine channel which are separated through a partition plate; a conveying blade, a paddle type stirring blade and a compacting blade which are driven by a stirring rotating rod are arranged in the stirring coating barrel, and the middle part of the barrel body is designed to have a large diameter, so that the conveying, three-dimensional efficient mixing and light compacting of seeds are realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coating device, concretely is a seed coating device, belongs to seed coating technical field. BACKGROUND

[0002] Seed coating technology as the key link of modern agricultural development can effectively prevent and cure diseases and insect pests, promote seed germination and seedling growth, and is an important guarantee for realizing seed quality standardization. At present, the common seed coating equipment on the market mainly adopts the mixing or atomization combined with stirring mode to realize seed coating, but there are still many technical limitations in practical application.

[0003] In the prior art, the seed coating and drying all-in-one machine disclosed by the announcement number CN204069677U integrates the coating and drying functions, adopts a mixing drum for mixing, and sets a hot air machine at the discharge port for drying, but the seed coating agent adding mechanism can be relatively simple, the liquid medicine atomization effect and the initial mixing uniformity with the seeds still have room for improvement, and the single mixing drum can cause high seed breakage rate in the mixing process, and the coating uniformity is also difficult to reach the ideal state. For example, the seed coating and pill making device disclosed by the announcement number CN104145566A preliminarily soaks the seeds by setting a soaking pool, then stirs the soaked seeds by using a spiked auger and makes the medicine powder wrap the seeds. Although the device has a simple structure, it has obvious defects: the soaking mode can easily cause some seeds to excessively absorb the liquid medicine and some seeds to be insufficiently soaked, and the initial distribution is uneven. The medicine powder wrapping is mainly realized by the stirring of the spiked auger. This mechanical stirring mode can more easily cause the seed coat to be damaged for the soaked seeds, and the combination firmness of the medicine powder and the seeds is poor, and the coating layer is easy to fall off in the subsequent conveying process. In summary, the seed coating devices in the prior art generally have the following common technical problems: first, the liquid medicine atomization effect is poor or the initial distribution is uneven, which causes the coating uniformity on the seed surface to be not ideal, and affects the coating quality; second, the stirring and mixing mechanism is not optimized, which can easily cause the seeds to be damaged in the mixing process, and it is difficult to realize the firm adhesion of the coating agent on the seed surface, and it is difficult to simultaneously consider the coating qualified rate and the falling rate; third, the existing equipment has a contradiction between realizing the coating uniformity and controlling the seed breakage rate, and it is difficult to maintain the seed breakage rate at a low level while ensuring the high coating qualified rate. In addition, although some equipment integrates the drying function and the like, the overall operation efficiency still has room for improvement, and the automation and precision degree need to be further strengthened. SUMMARY

[0004] The utility model provides a seed coating device to solve the problems of poor coating uniformity, easy seed breakage and low liquid medicine utilization rate of the existing seed coating machine.

[0005] The present invention achieves the above objectives through the following technical solution: a seed coating device, comprising a coating assembly, the coating assembly comprising an atomizing coating tank and a stirring coating cylinder, the stirring coating cylinder being connected to the bottom end of the atomizing coating tank in an upwardly inclined manner, the upper end of the atomizing coating tank being connected to a feed hopper, and a feeding assembly being provided between the atomizing coating tank and the feed hopper.

[0006] The atomizing coating can is equipped with a seed spinning disc and a dual-stage atomizing tube. The seed spinning disc has multiple grooves along its edge. The dual-stage atomizing tube is equipped with an airflow chamber and a liquid medicine chamber. The airflow chamber of the dual-stage atomizing tube has an annular airflow channel, and the liquid medicine chamber of the dual-stage atomizing tube has several liquid medicine channels.

[0007] The mixing and coating cylinder is equipped with a rotating stirring rod inside the cylinder, and conveying blades, stirring blades and compaction blades are fixedly connected to the rod body;

[0008] The feeding assembly includes a feeding tube and a spiral feeding tube, which are driven synchronously.

[0009] As a further embodiment of this utility model: the atomizing coating tank has support rods that are evenly distributed around its circumference fixedly connected to its tank wall; a material-slinging motor is fixedly connected to the middle part of the top of the atomizing coating tank; and a material-slinging disc rotating rod is vertically connected to the center of the seed-slinging disc, with the rotating rod being fixedly connected to the rotating shaft of the material-slinging motor on the same axis.

[0010] As a further embodiment of this utility model: the bottom end of the feed hopper is connected to a discharge pipe, the bottom end of the discharge pipe is connected to the body of the spiral feeding pipe, the spiral feeding pipe is horizontally arranged, the discharge end of the spiral feeding pipe is connected to an inclined discharge pipe, the body of the discharge pipe penetrates the top of the atomizing coating tank, and the discharge end of the discharge pipe is located directly above the seed throwing disc.

[0011] As a further embodiment of this utility model: the feeding tube is horizontally inserted through the feeding tube, and the tube body of the feeding tube is connected to the feeding tube. A feeding roller is rotatably installed inside the feeding tube, and the roller body of the feeding roller has several material grooves.

[0012] As a further embodiment of this utility model: a feeding roller is coaxially fixedly connected to a feeding shaft, and a driven wheel is coaxially fixedly connected to one end of the feeding shaft located outside the feeding tube. A driving wheel is fixedly sleeved on the feeding rod of the spiral feeding tube, and a transmission belt connects the driving wheel and the driven wheel.

[0013] As a further embodiment of this utility model: a feeding motor is provided at one end of the spiral feeding tube, the feeding rotor of the spiral feeding tube is fixedly connected to the rotating shaft of the feeding motor along the same axis, a bottom support plate is connected to one side of the atomizing coating can, and the body of the feeding motor is fixedly connected to the bottom support plate.

[0014] As a further embodiment of this utility model: a stirring motor is connected to the inclined bottom end of the stirring coating cylinder, the rotating shaft of the stirring motor is fixedly connected to the stirring rod on the same axis, the conveying blades and the compacting blades are arranged sequentially along the conveying direction of the seed material, the conveying blades are large-pitch spiral blades, the compacting blades are small-pitch spiral blades, a large-diameter cylinder body is provided in the middle of the stirring coating cylinder, the connection position of the stirring blades is located inside the large-diameter cylinder body of the stirring coating cylinder, and the stirring blades are paddle blades.

[0015] As a further improvement of this utility model: the seed throwing disc has a concave shape, and the multiple grooves of the seed throwing disc include a primary inner groove and a secondary inner groove. The primary inner groove and the secondary inner groove are staggered in sequence on the edge of the seed throwing disc, and the groove depth of the primary inner groove and the secondary inner groove are set in a stepped manner.

[0016] As a further embodiment of this utility model: the inner part of the dual-stage atomizing tube is connected to a partition, the airflow chamber separated by the partition is connected to an air inlet pipe, and the liquid chamber separated by the partition is connected to a liquid inlet pipe.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model is equipped with an atomizing coating tank and a stirring coating cylinder. The stirring coating cylinder is connected to the bottom of the atomizing coating tank in an upward inclined position. The upper end of the atomizing coating tank is connected to a feed hopper. A feeding component is set between the atomizing coating tank and the feed hopper. Through the atomizing coating tank and the stirring coating cylinder, multi-layer coating operations can be achieved for seeds. When coating seeds, the feeding component realizes the initial distribution and conveying of seeds. The upward inclined position of the stirring coating cylinder connected to the bottom of the atomizing coating tank forms a unique material flow direction, ensuring that the seeds are mixed in a three-dimensional mixing mode of axial propulsion and radial tumbling during the stirring process, which greatly improves the coating effect. The feed hopper is connected to the upper end of the atomizing coating tank and is located between the two. The internal structure of the atomizing coating tank lays the foundation for subsequent fine atomization.

[0019] 2. The atomizing coating can of this utility model is equipped with a seed throwing disc and a dual-stage atomizing tube. The seed throwing disc has multiple sets of grooves along its edge. The dual-stage atomizing tube has an airflow chamber and a liquid medicine chamber. The airflow chamber of the dual-stage atomizing tube has an annular airflow channel, and the liquid medicine chamber has several liquid medicine channels. The seed throwing disc, through the multiple sets of grooves along its edge, can throw the seeds at different initial velocities during high-speed rotation, making the seeds more evenly dispersed. The dual-stage atomizing tube, by independently setting the airflow chamber and the liquid medicine chamber within its tube, and by setting the annular airflow channel and several liquid medicine channels in its tube body, forms a dual-stage atomization design. Under pressure, the liquid medicine forms a liquid film through the micro-aperture liquid medicine channels; compressed air further breaks up the liquid film, producing uniform micron-sized droplets.

[0020] 3. The mixing and coating cylinder of this utility model is equipped with a rotating stirring rod inside the cylinder. The stirring rod is fixedly connected with conveying blades, stirring blades and compacting blades. The conveying blades, stirring blades and compacting blades respectively perform the functions of pushing the pre-coated seeds forward, fully mixing and stirring during the pushing process, and lightly compacting the coated seeds to enhance the adhesion of the coating layer. The combined use of these three types of blades ensures the continuity of the coating process and the stability of the coating quality.

[0021] 4. The feeding assembly of this utility model includes a feeding tube and a spiral feeding tube. The feeding tube and the spiral feeding tube are driven synchronously. The synchronous driving design of the feeding tube and the spiral feeding tube ensures that the seed supply from the feeding hopper to the atomizing coating tank is continuous, controllable and coordinated with the subsequent processes, avoiding the problems of blockage or uneven feeding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the connection structure between the atomizing coating can and the feed hopper of this utility model;

[0024] Figure 3 This is a schematic diagram of the connection structure between the feed hopper and the feeding assembly of this utility model;

[0025] Figure 4 This is a schematic diagram of the cross-sectional structure of the mixing and coating cylinder of this utility model;

[0026] Figure 5 This is a schematic diagram of the disassembled material feeding tube structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the internal structure of the atomizing coating can of this utility model;

[0028] Figure 7 This is a schematic diagram of the seed-spinning disc structure of this utility model;

[0029] Figure 8 This utility model Figure 6 Schematic diagram of the structure at point A in the middle.

[0030] In the diagram: 1. Atomizing coating tank; 11. Support rod; 12. Discharge motor; 13. Bottom support plate; 2. Feed hopper; 21. Discharge pipe; 3. Mixing coating cylinder; 31. Mixing motor; 32. Mixing rotor; 33. Conveying blade; 34. Mixing blade; 35. Compacting blade; 4. Feeding pipe; 41. Feeding roller; 42. Material trough; 43. Feeding shaft; 44. Driven wheel; 5. Spiral feeding pipe; 51. Discharge pipe; 52. Feeding motor; 53. Driving wheel; 54. Drive belt; 6. Seed throwing disc; 61. Throwing disc rotor; 62. Primary inner groove; 63. Secondary inner groove; 7. Double-stage atomizing pipe; 71. Baffle plate; 72. Liquid channel; 73. Annular airflow channel; 74. Air inlet pipe; 75. Liquid inlet pipe. Detailed Implementation

[0031] 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.

[0032] Example 1

[0033] like Figures 1 to 8 As shown, a seed coating device includes a coating assembly, which includes an atomizing coating tank 1 and a stirring coating cylinder 3. The stirring coating cylinder 3 is connected to the bottom of the atomizing coating tank 1 in an upward inclined position. The upper end of the atomizing coating tank 1 is connected to a feed hopper 2. A feeding assembly is provided between the atomizing coating tank 1 and the feed hopper 2. Through the atomizing coating tank 1 and the stirring coating cylinder 3, multi-layer coating operations can be achieved for seeds. During seed coating, the feeding assembly realizes the initial distribution and conveying of seeds. The upward inclined position of the stirring coating cylinder 3 connected to the bottom of the atomizing coating tank 1 forms a unique material flow direction, ensuring that the seeds form a three-dimensional mixing mode of axial propulsion and radial tumbling during the stirring process, which greatly improves the coating effect. The upper end of the atomizing coating tank 1 is connected to the feed hopper 2 and is located between the two. The internal structure of the atomizing coating tank 1 lays the foundation for subsequent fine atomization.

[0034] The atomizing coating canister 1 is equipped with a seed throwing disc 6 and a dual-stage atomizing tube 7. The seed throwing disc 6 has multiple sets of grooves along its edge. The dual-stage atomizing tube 7 has an airflow chamber and a liquid medicine chamber. The airflow chamber of the dual-stage atomizing tube 7 has an annular airflow channel 73, and the liquid medicine chamber of the dual-stage atomizing tube 7 has several liquid medicine channels 72. The seed throwing disc 6, through the multiple sets of grooves along its edge, can throw the seeds at different initial velocities during high-speed rotation, making the seeds more evenly dispersed. The dual-stage atomizing tube 7, by independently setting up an airflow chamber and a liquid medicine chamber within its tube, and by setting an annular airflow channel 73 and several liquid medicine channels 72 in its tube body, forms a dual-stage atomization design. Under pressure, the liquid medicine forms a liquid film through the micro-aperture liquid medicine channels 72; compressed air further breaks up the liquid film, producing uniform micron-sized droplets.

[0035] Inside the mixing and coating cylinder 3, a stirring rod 32 is rotatably installed. The stirring rod 32 is fixedly connected to a conveying blade 33, a stirring blade 34, and a compaction blade 35. The conveying blade 33, the stirring blade 34, and the compaction blade 35 respectively perform the functions of pushing the pre-coated seeds forward, thoroughly mixing and stirring them during the process, and lightly compacting the coated seeds to enhance the adhesion of the coating layer. The combined use of these three types of blades ensures the continuity of the coating process and the stability of the coating quality.

[0036] The feeding assembly includes a feeding tube 4 and a spiral feeding tube 5. The feeding tube 4 and the spiral feeding tube 5 are driven synchronously. The synchronous drive design of the feeding tube 4 and the spiral feeding tube 5 ensures that the seed supply from the feed hopper 2 to the atomizing coating tank 1 is continuous, controllable and coordinated with the subsequent processes, avoiding the problems of blockage or uneven feeding.

[0037] Example 2

[0038] Improvements based on Example 1:

[0039] like Figure 1 and Figure 7As shown, the atomizing coating tank 1 has support rods 11 that are evenly distributed around its circumference fixedly connected to its tank wall. A material-throwing motor 12 is fixedly connected to the middle part of the top of the atomizing coating tank 1. A material-throwing disc 6 has a vertically connected rotating rod 61 at the center of its disc body, and the rotating rod 61 is fixedly connected to the rotating shaft of the material-throwing motor 12 along the same axis. The support rods 11 provide stable and uniform radial support for the atomizing coating tank 1, effectively preventing deformation or displacement of the tank body due to vibration or load during operation, and ensuring the geometric accuracy of the core working area. The rotational power generated by the material-throwing motor 12 can be directly transmitted to the seed-throwing disc 6, enabling the seed-throwing disc 6 to obtain a stable and high rotational speed, so that the seed-throwing disc 6 can generate sufficient centrifugal force under high-speed rotation to evenly scatter the seeds, forming a uniform seed curtain, and fully contacting the subsequent atomized liquid.

[0040] like Figures 1 to 5 As shown, the bottom end of the feed hopper 2 is connected to the discharge pipe 21, and the bottom end of the discharge pipe 21 is connected to the body of the spiral feeding pipe 5. The spiral feeding pipe 5 is set horizontally, and the discharge end of the spiral feeding pipe 5 is connected to the inclined discharge pipe 51. The body of the discharge pipe 51 passes through the top of the atomizing coating tank 1, and the discharge end of the discharge pipe 51 is located directly above the seed throwing disc 6. The discharge pipe 21 allows the seeds to smoothly transition from vertical feeding to horizontal conveying. The spiral feeding pipe 5 is set horizontally, and its internal spiral blades can generate a stable axial thrust on the seeds when rotating, realizing quantitative and controllable horizontal conveying of the seeds, avoiding blockage or impact that may be caused by vertical falling. The discharge end of the discharge pipe 51 is located directly above the seed throwing disc 6, ensuring that the seeds conveyed by the spiral feeding pipe 5 can accurately and centrally fall into the central area of ​​the high-speed rotating seed throwing disc 6, ensuring that the seed throwing disc 6 can use centrifugal force to evenly scatter the seeds.

[0041] Furthermore, the feeding tube 4 extends horizontally through the feeding tube 21, and the tube body of the feeding tube 4 is connected to the feeding tube 21. A feeding roller 41 is rotatably installed inside the feeding tube 4. The roller body of the feeding roller 41 has several material grooves 42. When the feeding roller 41 rotates, the material grooves 42 will periodically contact the seeds in the feeding tube 21. When each material groove 42 rotates, it periodically discharges the seeds above into the flow channel below leading to the spiral feeding tube 5. This can cut the continuous feeding flow into discrete, volume-controllable hoppers, achieving preliminary metering and stable feeding. At the same time, due to the continuous rotation of the feeding roller 41, it can effectively break up the seed arch bridges that may form in the feeding tube 21, prevent blockage, and ensure that seeds, especially those with poor flowability, can be fed smoothly.

[0042] Furthermore, a feeding roller 41 is coaxially fixedly connected to a feeding shaft 43. A driven wheel 44 is coaxially fixedly connected to one end of the feeding shaft 43 located outside the feeding tube 4. An active wheel 53 is fixedly sleeved on the feeding rod of the spiral feeding tube 5. A transmission belt 54 connects the active wheel 53 and the driven wheel 44. When the feeding motor 52 drives the feeding rod of the spiral feeding tube 5 to rotate, the power is synchronously transmitted to the feeding roller 41 through the active wheel 53, the transmission belt 54, and the driven wheel 44 on the feeding shaft 43. This ensures that the feeding action and the spiral conveying action are in a fixed ratio in terms of speed, ensuring that the amount of seeds fed down by the feeding roller 41 per unit time is precisely matched with the forward conveying capacity of the spiral feeding tube 5. This avoids the problem of seed accumulation and blockage at the feeding tube 4 or insufficient material supply from the spiral feeding tube 5 due to the mismatch in speed between the two.

[0043] Furthermore, a feeding motor 52 is installed at one end of the spiral feeding pipe 5. The feeding rotor of the spiral feeding pipe 5 is coaxially and fixedly connected to the rotating shaft of the feeding motor 52. A bottom support plate 13 is connected to one side of the atomizing coating tank 1. The body of the feeding motor 52 is fixedly connected to the bottom support plate 13. As the core power source of the entire feeding assembly, the feeding motor 52 directly controls the start / stop and flow rate of the feeding by starting, stopping and rotating. The bottom support plate 13 provides a stable mounting platform for the feeding motor 52, avoiding the direct application of the motor weight and operating vibration to other weak points of the pipe or tank body. This improves the rigidity and stability of the overall structure. It should be noted that the spiral feeding pipe 5 can adopt a spiral feeding device disclosed in announcement number CN220077579U, which includes a cylinder, a central shaft and spiral blades. The cylinder is provided with an inlet and an outlet, with the outlet located on the lower side of the cylinder. The central shaft is rotatably connected to the cylinder, and the spiral blades are set on the central shaft. That is, the pipe body of the spiral feeding pipe 5 is equivalent to the cylinder, and the feeding rotor of the spiral feeding pipe 5 is equivalent to the central shaft. The rod body of the feeding rotor located inside the pipe body of the spiral feeding pipe 5 is also fixedly connected with spiral blades.

[0044] like Figure 1 and Figure 4As shown, a stirring motor 31 is connected to the inclined bottom end of the mixing and coating cylinder 3. The rotating shaft of the stirring motor 31 is fixedly connected to the stirring rod 32 on the same axis. The conveying blades 33 and the compacting blades 35 are arranged sequentially along the conveying direction of the seed material. The conveying blades 33 are large-pitch spiral blades, and the compacting blades 35 are small-pitch spiral blades. A large-diameter cylinder body is provided in the middle of the mixing and coating cylinder 3. The connection position of the stirring blades 34 is located inside the large-diameter cylinder body of the mixing and coating cylinder 3. The stirring blades 34 are paddle-type blades. The conveying blades 33 adopt a large-pitch spiral blade structure, which enables them to generate a large axial thrust at a unit speed, quickly conveying the seeds from the atomizing coating tank 1 forward, preventing accumulation at the feed end, and compacting the seeds. The blade 35 adopts a small-pitch helical blade structure, which allows it to generate more compression and tumbling of the seeds within the same axial space. It lightly compacts the seeds at the end of the coating process, enhancing the adhesion of the coating agent. It also provides a larger mixing space for the large-diameter cylinder body in the middle of the mixing coating cylinder 3, reducing the material filling rate. When the seeds enter this expansion area from the smaller front section, the flow rate slows down and the residence time is extended. The mixing blade 34 has a paddle-type blade structure, which can effectively throw the material in the center toward the cylinder wall or bring the material on the cylinder wall back to the center, generating strong radial mixing and axial backflow. Within this large space, the paddle-type mixing blade 34 can maximize its tumbling and diffusion effect, allowing the seeds and coating agent to be fully and evenly mixed.

[0045] like Figure 2 , Figure 6 and Figure 7 As shown, the seed-spinning disc 6 has a concave shape. The seed-spinning disc 6 has multiple sets of grooves, including primary grooves 62 and secondary grooves 63. The primary grooves 62 and secondary grooves 63 are staggered along the edge of the seed-spinning disc 6, and the depths of the primary grooves 62 and secondary grooves 63 are stepped. The concave shape of the seed-spinning disc 6 allows falling seeds to naturally converge towards the center area upon contact with the seed-spinning disc 6. Before centrifugal force begins to act, the concave surface has a pre-collection and guiding effect on the seeds. When the seed spinning disc 6 rotates at high speed, the seeds need to climb along the concave curved surface under the action of centrifugal force before they can be thrown out. This climbing process gives the seeds a more complex motion trajectory, which helps to disperse the seed group. The primary inner groove 62 and the secondary inner groove 63 of the seed spinning disc 6 are staggered in sequence at the edge of the seed spinning disc 6, so that the timing and force of the seeds being thrown out at different circumferential positions are different, which is conducive to forming a wider and more uniform seed curtain, making the spatial distribution of seeds in the atomizing coating can 1 more three-dimensional and uniform.

[0046] like Figure 2 , Figure 6 and Figure 8As shown, the dual-stage atomizing tube 7 is connected to a baffle 71 inside. The dual-stage atomizing tube 7 is connected to an air inlet pipe 74 through the airflow chamber separated by the baffle 71, and to a liquid inlet pipe 75 through the liquid inlet chamber separated by the baffle 71. The baffle 71 divides the internal space of the dual-stage atomizing tube 7 into two independent airflow chambers and a liquid inlet chamber. The compressed air and the liquid flow completely independently and do not interfere with each other. Their pressure and flow rate can be precisely controlled separately. The air inlet pipe 74 is used to introduce high-pressure compressed air, and the liquid inlet pipe 75 is used to transport the seed coating agent liquid to be atomized. This avoids unnecessary mixing or pulsation interference between the gas and liquid phases before they enter the atomizing tube, making the medium supply more stable. It should be noted that the air inlet pipe 74 and the liquid inlet pipe 75 can be equipped with corresponding pressure and flow regulating devices to achieve precise control of the entire atomization process.

[0047] Working principle: The seeds first enter the feed hopper 2, and then enter the conveying system consisting of the feeding pipe 4 and the spiral feeding pipe 5 through the feeding pipe 21. The feeding roller 41 in the feeding pipe 4 periodically agitates the seeds through the material groove 42 on its roller body to achieve preliminary metering and prevent blockage. The spiral feeding pipe 5 is driven by the feeding motor 52 to convey the seeds horizontally, and then accurately delivers them to the position directly above the seed throwing disc 6 in the atomizing coating tank 1 through the inclined discharge pipe 51.

[0048] Seeds fall onto the seed throwing disc 6, where they rise along the concave surface under centrifugal force and are thrown out from grooves with different characteristics with diverse trajectories and initial velocities, thus forming a three-dimensional and evenly distributed seed curtain inside the atomizing coating can 1. At the same time, the dual-stage atomizing tube 7 starts working, and the liquid medicine forms a liquid film through the liquid medicine channel 72. Compressed air is sprayed out at high speed from the annular airflow channel 73 to break the liquid film a second time, producing micron-sized fine droplets. These droplets are fully mixed with the falling seed curtain, achieving the initial coating of the seeds.

[0049] The pre-coated seeds then enter the upwardly inclined mixing and coating cylinder 3. The conveying blades 33 are responsible for rapidly propelling the seeds forward. When the seeds enter the large-diameter cylinder area in the middle of the mixing and coating cylinder 3, strong radial mixing and axial backflow are generated in this expanded space, allowing the seeds and coating agent to be further fully and evenly mixed. Finally, the seeds are lightly compacted by the compaction blades 35 with a small-pitch spiral blade structure, which enhances the adhesion of the coating layer to the seed surface. The seeds that have completed the entire coating process are finally discharged from the discharge end of the mixing and coating cylinder 3.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A seed coating device, comprising a coating assembly, characterized in that: The coating assembly includes an atomizing coating tank (1) and a stirring coating cylinder (3). The stirring coating cylinder (3) is connected to the bottom of the atomizing coating tank (1) in an upward inclined manner. The upper end of the atomizing coating tank (1) is connected to a feed hopper (2). A feeding assembly is provided between the atomizing coating tank (1) and the feed hopper (2). The atomizing coating canister (1) is provided with a seed spinning disc (6) and a dual-stage atomizing tube (7). The seed spinning disc (6) has multiple sets of grooves along its edge. The dual-stage atomizing tube (7) is provided with an airflow chamber and a liquid medicine chamber. The airflow chamber of the dual-stage atomizing tube (7) has an annular airflow channel (73) and the liquid medicine chamber of the dual-stage atomizing tube (7) has several liquid medicine channels (72). The mixing and coating cylinder (3) is rotatably equipped with a stirring rod (32), and the stirring rod (32) is fixedly connected with a conveying blade (33), a stirring blade (34) and a compaction blade (35). The feeding assembly includes a feeding tube (4) and a spiral feeding tube (5), which are driven synchronously.

2. The seed coating device according to claim 1, characterized in that: The atomizing coating can (1) has a support rod (11) that is evenly distributed around its circumference fixedly connected to its wall. The top of the atomizing coating can (1) has a material-slinging motor (12) fixedly connected to its middle part. The center of the seed-slinging disc (6) has a spinning disc rod (61) vertically connected to its center. The spinning disc rod (61) is fixedly connected to the rotating shaft of the material-slinging motor (12) along the same axis.

3. The seed coating device according to claim 1, characterized in that: The bottom end of the feed hopper (2) is connected to the discharge pipe (21), the bottom end of the discharge pipe (21) is connected to the pipe body of the spiral feeding pipe (5), the spiral feeding pipe (5) is set horizontally, the discharge end of the spiral feeding pipe (5) is connected to the inclined discharge pipe (51), the pipe body of the discharge pipe (51) penetrates the top of the atomizing coating tank (1), and the discharge end of the discharge pipe (51) is located directly above the seed throwing disc (6).

4. The seed coating device according to claim 3, characterized in that: The feeding tube (4) is horizontally inserted through the feeding tube (21), and the tube body of the feeding tube (4) is connected to the feeding tube (21). A feeding roller (41) is rotatably installed inside the feeding tube (4), and the roller body of the feeding roller (41) has several material grooves (42).

5. The seed coating device according to claim 4, characterized in that: The feeding roller (41) is coaxially fixedly connected to the feeding shaft (43). The end of the feeding shaft (43) located outside the feeding tube (4) is coaxially fixedly connected to the driven wheel (44). The feeding rod of the spiral feeding tube (5) is fixedly fitted with the driving wheel (53). A transmission belt (54) is connected between the driving wheel (53) and the driven wheel (44).

6. The seed coating device according to claim 5, characterized in that: One end of the spiral feeding pipe (5) is provided with a feeding motor (52). The feeding rod of the spiral feeding pipe (5) is fixedly connected to the rotating shaft of the feeding motor (52) along the same axis. A bottom support plate (13) is connected to one side of the atomizing coating can (1). The body of the feeding motor (52) is fixedly connected to the bottom support plate (13).

7. The seed coating device according to claim 1, characterized in that: The inclined bottom end of the mixing coating cylinder (3) is connected to a stirring motor (31). The rotating shaft of the stirring motor (31) is fixedly connected to the stirring rod (32) on the same axis. The conveying blade (33) and the compaction blade (35) are arranged sequentially along the conveying direction of the seed material. The conveying blade (33) is a large pitch spiral blade structure, and the compaction blade (35) is a small pitch spiral blade structure. The middle part of the mixing coating cylinder (3) is provided with a large diameter cylinder body. The connection position of the stirring blade (34) is located inside the large diameter cylinder body of the mixing coating cylinder (3). The stirring blade (34) is a paddle blade structure.

8. The seed coating device according to claim 1, characterized in that: The seed spinning disc (6) has a concave body. The seed spinning disc (6) has multiple grooves including a primary groove (62) and a secondary groove (63). The primary groove (62) and the secondary groove (63) are staggered along the edge of the seed spinning disc (6), and the groove depths of the primary groove (62) and the secondary groove (63) are stepped.

9. The seed coating device according to claim 1, characterized in that: The inner part of the dual-stage atomizing tube (7) is connected to a partition (71). The dual-stage atomizing tube (7) is connected to an air inlet pipe (74) through the airflow chamber separated by the partition (71). The dual-stage atomizing tube (7) is connected to an inlet pipe (75) through the liquid inlet chamber separated by the partition (71).

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