Corn seed coating device

Abstract

The utility model relates to the field of seed processing, in particular to a corn seed coating device which comprises a base, a driving mechanism installed inside the base, a charging barrel installed above the base, a spiral lifting assembly installed in the charging barrel and a screening assembly supported inside the charging barrel. Filter holes are formed in the baffle, a discharge port is formed in the middle of the baffle, and a gap is reserved between the baffle and the inner wall of the charging barrel; the baffle is supported in the charging barrel through a supporting rod; the upper part of the lifting cylinder is communicated with the discharge hole and sleeves the outer side of the spiral lifting assembly; the sealing piece is slidably arranged on the edge of the baffle and used for sealing the gap between the baffle and the charging barrel. When the seed coating machine is used, the baffle can be isolated from a medicament at the bottom of the charging barrel through the sealing piece, seeds are conveyed to the position above the baffle through the spiral lifting assembly, the coated seeds are contained above the baffle, and rapid screening of the coated seeds and the medicament is achieved.

Description

Technical Field

[0001] This utility model relates to the field of seed processing, and in particular to a corn seed coating device. Background Technology

[0002] Seed coating is a modern agricultural technology that involves uniformly covering the surface of seeds with a coating agent composed of film-forming agents, fertilizers, pesticides, and microorganisms before sowing. This forms a protective layer, enhances seed resistance, promotes germination, reduces pests and diseases, and facilitates mechanized sowing.

[0003] Currently, a Chinese patent application with publication number CN 222090107 U and publication date of December 3, 2024, discloses a coating device for producing corn seeds, including a base, a support seat fixed to the top of the base, a processing barrel fixedly connected to the top of the support seat, two discharge pipes at the bottom of the processing barrel, the bottom ends of the two discharge pipes extending through the support seat to the bottom of the support seat, extension seats fixedly connected to both sides of the support seat, and a lifting stirring and mixing structure fixedly installed on the top of the two extension seats, and the lifting stirring and mixing structure extending into the interior of the processing barrel.

[0004] During use, the lifting and stirring mechanism mixes the seeds and materials inside the processing cylinder, and after the mixing is completed, the materials are discharged through the discharge pipe at the bottom for collection.

[0005] Regarding the aforementioned technologies, after seed coating, the agent needs to be discharged from the processing cylinder before the coated seeds can be separated. When coating the next batch of seeds, the agent needs to be refilled into the cylinder before the next batch of seeds can be coated, which affects production efficiency. Utility Model Content

[0006] In order to improve the efficiency of seed coating and enhance the screening of coated seeds, this utility model provides a corn seed coating device.

[0007] This utility model provides a corn seed coating device, which adopts the following technical solution:

[0008] A corn seed coating device includes a base, a drive mechanism installed inside the base, a feed cylinder installed above the base, and a spiral lifting assembly installed in the feed cylinder. It also includes a screening assembly installed inside the feed cylinder, comprising a baffle plate, the baffle plate being circular with its edge lower than its center, filter holes on the baffle plate, and a discharge port in the center of the baffle plate, with a gap between the baffle plate and the inner wall of the feed cylinder; a support rod, one end of which is fixedly mounted above the baffle plate, and the other end of which is supported on the inner wall of the feed cylinder; a lifting cylinder, the upper part of which is fixedly connected to the baffle plate and communicates with the discharge port, and the lifting cylinder is sleeved on the outside of the spiral lifting assembly; and a sealing member, which is slidably / or rotatably mounted on the edge of the baffle plate, and the sealing member is used to close the gap between the baffle plate and the feed cylinder.

[0009] By adopting the above technical solution, during the seed coating process, the spiral lifting component drives the seeds and agents to mix inside the barrel. Simultaneously, the seeds and agents on the spiral lifting component are lifted upwards into the lifting cylinder. Driven by the spiral lifting component, the seeds and agents in the lifting cylinder are lifted to above the baffle and fall onto the baffle without the restriction of the lifting cylinder. Since the middle position of the baffle is higher than the edge position, and there is a gap between the baffle and the barrel, the seeds and agents will roll towards the edge under the action of gravity after falling above the baffle and fall into the agent below the baffle through the gap, continuing to mix. After the seeds and agents have been mixed to a certain extent and the coating is completed, the sealing component extends out from the baffle by rotating or sliding, blocking the gap between the baffle and the barrel. At this time, when the seeds and agents are lifted together to above the baffle, the agent lifted to above the baffle will fall into the agent below the baffle through the filter holes of the baffle, while the coated seeds will remain above the baffle. By setting up an elevator to lift the seeds and pesticides together to a baffle, and then isolating the seeds above the baffle after coating, the pesticides leak out through the filter holes on the baffle, thus completing the rapid screening of the seeds. After removing the coated seeds from the baffle, the next batch of seeds can be loaded into the material cylinder for coating. By improving the screening efficiency of seeds and pesticides, the efficiency of seed coating is improved.

[0010] Optionally, multiple closure components are provided, and the multiple closure components are evenly distributed in a ring on the edge of the baffle. Each closure component is slidably connected to the edge of the baffle. Each closure component is slidably disposed below the baffle, and each closure component is rotatably provided with a handle on its top.

[0011] By employing the above technical solution, during seed coating, the sealing member slides towards the center of the baffle, opening the gap between the baffle and the cylinder. At this point, the seeds can slide down through the gap. When screening the seeds after coating, pulling the handle slides the sealing member towards the inner wall of the cylinder, blocking the gap between the baffle and the inner wall. The coated seeds are then isolated above the baffle. This sliding sealing member simplifies operation; simply pulling the handle closes the gap between the baffle and the inner wall of the cylinder. Furthermore, positioning the sealing member below the baffle reduces the likelihood of it obstructing the rolling seeds above the baffle, decreasing the probability of seeds remaining above the baffle and thus reducing the likelihood of seeds remaining above the baffle and failing to mix with the coating agent.

[0012] Optionally, the closure is inclined and forms an obtuse angle with the upper surface of the baffle.

[0013] By adopting the above technical solution, when the sealing member is folded under the baffle, the agent falling from the filter holes of the baffle will fall on the upper surface of the inclined sealing member. Because the sealing member is inclined, the agent is less likely to accumulate on the baffle. When the sealing member is opened, it blocks the space between the baffle and the barrel. Because the sealing member and the upper surface of the baffle are set at an obtuse angle, the sealing member can open outward, increasing the supporting area of ​​the baffle. At the same time, because the sealing member is higher than the edge of the baffle, it acts as a barrier, which can effectively reduce the probability of the seeds falling off the sealing member after coating.

[0014] Optionally, it also includes a lifting assembly, which includes a pull ring and a pull rod that corresponds to each of the closure components. One end of the pull rod is rotatably connected to the pull ring, and the other end is rotatably connected above the corresponding closure component.

[0015] By adopting the above technical solution, when the closure needs to be closed, simply lift the baffle. Since the closure is tilted, it automatically slides downward under the action of gravity and retracts inward at the edge of the baffle. When the closure needs to be opened, lift the pull ring upward. The pull ring will pull the closure out from the edge of the baffle above the closure. At the same time, since the pull ring is connected to the closure one by one through multiple pull rods, when the pull ring is pulled, the closure will extend out from the edge of the baffle at the same time under the pull of the pull rods, making the operation convenient.

[0016] Optionally, the pull ring is further provided with a fastening nut, which is used to lock the angle of the pull rod.

[0017] When the closure is slid out from the edge of the baffle using a pull rod, if the position of the closure is not locked, it will slide downwards under gravity and retract into the baffle. By adopting the above technical solution, after the pull rod pulls the closure out from the edge of the baffle, the angle between the pull rod and the closure is fixed. At this time, by using a fastening nut to fix the angle between the pull rod and the pull ring, the unfolding angle of the pull ring can be controlled to be constant, thereby fixing the angle between the pull rod and the closure, preventing the closure from sliding downwards, and thus fixing the position of the closure.

[0018] Optionally, the inner wall of the material cylinder is funnel-shaped, and the spiral lifting assembly is located in the middle of the material cylinder.

[0019] By employing this technical solution, when seeds and pesticides are mixed in the mixing drum, they move along the inner wall of the drum towards the center, sequentially contacting the spiral lifting assembly and entering the lifting cylinder. Seeds and pesticides fall from the baffle onto the top pesticide layer. The seeds then gradually move downwards along the edge of the drum, converging towards the spiral lifting assembly in the center, and entering the lifting cylinder in an orderly manner. This ensures orderly mixing of seeds and a more uniform mixing of the lifting assembly and pesticides.

[0020] Optionally, the baffle is further provided with a limiting component, which includes a fixing member and a rotating member. The fixing member is fixedly disposed above the baffle, and a gap is left between the fixing member and the baffle. The rotating member is rotatably disposed below the fixing member and is coaxially disposed with the spiral lifting assembly. The rotating member abuts against the top of the spiral lifting assembly and is used to limit the spiral lifting assembly.

[0021] When the screw conveyor assembly rotates within the cylinder, its connection solely via the bottom drive shaft causes it to oscillate during rotation. This oscillation leads to collisions between the blades and the inner wall of the cylinder, or compression of the seeds, resulting in seed damage or flattening and affecting seed quality. The aforementioned technical solution addresses this by leaving a gap between the fixed component and the baffle to reduce the probability of clogging the discharge port, allowing seeds to fall smoothly onto the baffle. A fixed rotating component abuts against the top of the screw conveyor assembly, providing support and ensuring stable support at both ends during rotation. This reduces oscillation and improves the overall stability of the screw conveyor assembly's rotation.

[0022] Optionally, a biting assembly and a drive shaft are provided above the base, and the drive shaft is drivenly connected to the drive mechanism; a transmission shaft is provided below the material cylinder, and the transmission shaft is drivenly connected to the spiral lifting assembly; the material cylinder is fixedly connected to the base through the biting assembly, and the drive shaft and the transmission shaft are drivenly connected.

[0023] By adopting the above technical solution, the first step in use is to align and engage the drive shaft on the barrel and the drive shaft on the base. The engaging component on the base will then engage the barrel and the base together. Next, seeds and pesticides are loaded into the barrel. The drive mechanism is then activated, transmitting power through the drive shaft to the drive shaft on the barrel. The power from the drive shaft is then transmitted to the spiral lifting component, which mixes the seeds and pesticides in the barrel and coats the seeds. After seed coating is complete and the coated seeds are separated, the barrel can be directly removed from the base and used as a pesticide storage container. If pesticides need to be removed from the barrel, the barrel can also be taken away for thorough cleaning. This modular structure, separating the barrel from the base, allows for direct replacement of the barrel when using multiple pesticides, reducing the probability of cross-contamination. It also facilitates thorough cleaning of the barrel, further reducing the probability of cross-contamination.

[0024] Optionally, a vibration generator may also be provided on the baffle.

[0025] By adopting the above technical solution, the vibration generator can drive the seeds and pesticides to vibrate rapidly above the baffle, thereby accelerating the movement speed of the seeds and pesticides on the baffle, increasing the probability of the seeds slipping off the edge of the baffle, and promoting the probability of the pesticides falling out of the filter holes, while also reducing the probability of the pesticides clogging the filter holes.

[0026] In summary, this utility model has at least one of the following beneficial technical effects:

[0027] By setting up an elevator and baffles, the seeds at the bottom of the coating device can be conveyed upwards through the elevator and then conveyed to the top of the baffles. The coating status of the seeds can be observed to determine whether the seed coating process is over. After the seed coating is completed, the seeds above the baffles are isolated using a sealing component, which completes the rapid screening of the coated seeds and thus improves the production efficiency of seed coating.

[0028] By evenly setting lifting components above the sealing member, the lifting components can simultaneously drive the sealing member to extend from the edge of the baffle, and the sealing member can be simultaneously restricted to the current position by tightening nuts. This allows the sealing member to be supported in the current state without human intervention, thus enabling the seeds after coating to be better isolated above the baffle.

[0029] A limiting component that allows the lifting component to rotate is set at the center of the baffle. The limiting component and the drive shaft can simultaneously limit the spiral lifting component at the top and bottom, thereby improving the stability of the spiral lifting component during rotation, reducing the probability of the spiral lifting component colliding with the seeds during swing and causing seed breakage, and reducing damage to the seeds during the coating process. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0031] Figure 2 This is an exploded view of the structure of an embodiment of this utility model;

[0032] Figure 3 This is a top view of the overall structure of an embodiment of this utility model;

[0033] Figure 4 yes Figure 3 Schematic diagram of the cross section of AA;

[0034] Figure 5 yes Figure 4 Schematic diagram of the extended state of the intermediate screening component;

[0035] Figure 6 This is a schematic diagram of the screening component structure in an embodiment of this utility model.

[0036] Explanation of reference numerals in the attached drawings: 100, base; 110, engagement assembly; 120, drive shaft; 200, drive mechanism; 300, material cylinder; 310, transmission shaft; 400, spiral lifting assembly; 500, screening assembly; 510, baffle; 511, filter hole; 512, discharge port; 520, support rod; 530, lifting cylinder; 540, sealing component; 550, vibration generator; 600, lifting assembly; 610, pull ring; 620, pull rod; 630, fastening nut; 700, limiting assembly; 710, fixing component; 720, rotating component. Detailed Implementation

[0037] The following combination Figures 1 to 6 The present invention will be described in further detail below.

[0038] This utility model discloses a corn seed coating device. (Refer to...) Figures 1 to 3A corn seed coating device mainly includes a base 100, a material cylinder 300 installed above the base 100, a spiral lifting component 400 disposed inside the material cylinder 300, a screening component 500 supported inside the material cylinder 300, and a lifting component 600 connected above the screening component 500. During use, seeds and pesticides are mixed together in the material cylinder 300, and the seeds are gradually coated during the mixing process. During coating, the lifting component 600 gradually conveys the seeds in the material cylinder 300 upwards, and they fall above a baffle 510. Because the upper surface of the baffle 510 is conical, the seeds, after falling onto the upper surface of the baffle 510, gradually fall from the edge of the baffle 510 into the material cylinder 300 below for coating. After coating is complete, the sealing member 540 on the baffle 510 is opened, isolating the space above the baffle 510 from the material cylinder 300 below, allowing the seeds to be directly separated from the pesticide after falling onto the baffle 510, thus achieving rapid separation of the coated seeds.

[0039] Reference Figure 2 and Figure 4 The base 100 is equipped with a drive mechanism 200. In this embodiment, the drive mechanism 200 uses a motor to provide power to the entire coating device. The upper surface of the base 100 is provided with a biting component 110 and a drive shaft 120. The biting component 110 is an annular groove opened on the upper end surface of the base 100. An elastic spring is provided on the side wall of the annular groove. The elastic spring protrudes into the annular groove, so that the material cylinder 300 is clamped by the elastic spring when placed in the annular groove. The drive shaft 120 is located in the middle of the annular groove and is connected to the output shaft of the motor. Optionally, the base 100 is also provided with a control panel, on which the operator can set parameters such as the rotation speed and time of the drive mechanism 200.

[0040] Reference Figures 4 to 5 A drive shaft 310 is provided at the bottom of the material cylinder 300. After the material cylinder 300 is installed on the base 100, the drive shaft 310 and the drive shaft 120 are engaged to realize transmission. In this embodiment, the drive shaft 120 and the drive shaft are connected by splines. A spiral lifting assembly 400 is also installed inside the material cylinder 300. The spiral lifting assembly 400 is installed inside the material cylinder 300 and is coaxial with the drive shaft 310. The drive shaft 310 and the spiral lifting assembly 400 are connected in a transmission manner. In order to allow the seeds and pesticides to gather near the spiral lifting assembly 400 when they are mixed in the material cylinder 300, the inner wall of the material cylinder 300 is set in a funnel shape.

[0041] In this embodiment, the bottom of the material cylinder 300 is also provided with a connecting part. The connecting part is an annular structure provided at the bottom of the material cylinder 300 and cooperating with the biting component 110. The connecting part is also provided with an annular groove. When the connecting part is installed in the annular groove, the elastic spring abuts against the annular groove to realize the biting of the base 100 and the material cylinder 300. In order to reduce the probability of crushing the seeds when the spiral lifting component 400 rotates, the spiral blades of the spiral lifting component 400 in this embodiment are flexible blades.

[0042] Reference Figures 4 to 6 The material cylinder 300 is also equipped with a screening assembly 500, which includes a baffle 510, a support rod 520, a lifting cylinder 530, and a sealing element 540. The baffle 510 is circular and has a conical structure with lower edges and a higher center. To allow the pesticide to fall off the baffle 510 after the seeds are isolated above it, filter holes 511 are evenly distributed on the baffle 510. One end of the support rod 520 is fixed above the baffle 510, and the other end is supported on the inner wall of the material cylinder 300, so that the baffle 510 can be rotated within the material cylinder 300. After the baffle 510 is supported on the inner wall of the material cylinder 300, a gap is left between the baffle 510 and the inner wall of the material cylinder 300. In order for the spiral lifting assembly 400 to lift the seeds from the bottom of the material cylinder 300 to above the baffle 510, the baffle 510 has a discharge port 512 in the middle. Below the discharge port 512, there is a lifting cylinder 530 with openings at both ends. The upper part of the lifting cylinder 530 is fixedly connected to the baffle 510 and communicates with the discharge port 512. After the baffle 510 is supported on the inner wall of the material cylinder 300, the lifting cylinder 530 is sleeved on the outside of the spiral lifting assembly 400 to form a channel for the seeds to rise.

[0043] Reference Figures 4 to 6 In this embodiment, the sealing member 540 is slidably disposed on the edge of the baffle 510. Multiple sealing members 540 are evenly distributed around the edge of the baffle 510. In this embodiment, a dovetail-shaped slider is provided at the edge of the baffle 510. A dovetail groove is provided on the side of the sealing member 540 facing the baffle 510. The dovetail-shaped slider is slidably disposed in the dovetail groove of the sealing member 540 to achieve the sliding connection of the sealing member 540 at the edge of the baffle 510. In this embodiment, the sealing members 540 are all slidably disposed below the baffle 510, and the sealing members 540 are inclined so that the sealing member 540 and the upper surface of the baffle 510 form an obtuse angle. When the sealing member 540 is unfolded, it is used to close the gap between the baffle 510 and the material cylinder 300, and to isolate the upper part of the baffle 510 from the lower part of the material cylinder 300.

[0044] Reference Figures 4 to 6To reduce the probability of seeds falling from the gap between two adjacent closures 540 after the closure 540 is unfolded, a flexible barrier net is connected between the two adjacent closures 540. In this embodiment, to facilitate the installation of the dovetail-shaped slider on the edge of the baffle 510 into the dovetail groove in the closure 540, a threaded hole is provided at the bottom of the dovetail groove, and a positioning stud is installed in the threaded hole. The closure 540 can be installed on the dovetail-shaped slider along the direction of the dovetail groove by removing the positioning stud from the threaded hole. After installation, the positioning stud is installed in the corresponding dovetail groove to limit the closure 540. Similarly, to reduce the chance of the closure 540 sliding off the dovetail-shaped slider when sliding along the dovetail groove, a stop is provided at the top of the dovetail groove to limit the movement at the end of the dovetail groove.

[0045] In other embodiments, the closure 540 may also be connected to the edge of the baffle 510 by a rotatable connection and disposed below the baffle 510, or the closure 540 and the baffle 510 may be slidably connected by a guide rail, slide rail or other sliding method.

[0046] Reference Figure 6 The baffle 510 is also provided with a limiting component 700, which includes a fixing member 710 and a rotating member 720. The fixing member 710 is fixedly disposed above the discharge port 512 of the baffle 510. A gap is left between the fixing member 710 and the baffle 510 so that the seeds can fall above the baffle 510 through the gap between the fixing member 710 and the baffle 510. A cylindrical support part is provided below the fixing member 710. In this embodiment, the rotating member 720 is a bearing. The outer peripheral surface of the bearing is embedded in the cylindrical support part and is coaxially disposed with the screw lifting component 400. When the baffle 510 is supported on the inner wall of the material cylinder 300 by the support rod 520, the inner peripheral surface of the bearing abuts against the screw lifting component 400 and limits the screw lifting component 400.

[0047] Reference Figure 6The closure 540 is also connected to a lifting assembly 600, which includes a pull ring 610 and a pull rod 620 corresponding to the closure 540. One end of the pull rod 620 is rotatably connected to the pull ring 610, and the other end is rotatably connected to the upper part of the corresponding closure 540. In order to limit the position of the closure 540 after the pull rod 620 pulls the closure 540 to the edge of the baffle 510, a fastening nut 630 is also provided on the pull ring 610. After the fastening nut 630 is tightened, the fastening nut 630 presses the pull ring 610 and the pull rod 620 together and locks the angle of the pull rod 620. After the angle of the pull ring 610 and the pull rod 620 is locked, the unfolding angle of the pull rod 620 becomes larger, so that it can be supported on the inner wall of the material cylinder 300. In this embodiment, the fastening nut 630 can be a wing nut that is easy to hold or a locking pin that can quickly lock the pull rod 620 and the pull ring 610.

[0048] Reference Figure 6 In this embodiment, a vibration generator 550 is also provided on the baffle 510. The vibration generator 550 is installed above the baffle 510. The vibration generator 550 can drive the seeds and the agent to vibrate rapidly above the baffle 510, thereby accelerating the movement of the seeds and the agent on the baffle 510, increasing the probability of the seeds falling off the edge of the baffle 510, and promoting the probability of the agent falling off the filter hole 511. At the same time, it can also reduce the probability of the agent clogging the filter hole 511.

[0049] The implementation principle of the corn seed coating device of this utility model is as follows: During the seed coating process, the spiral lifting component 400 drives the seeds and agents to mix inside the material cylinder 300. At the same time, the seeds and agents on the spiral lifting component 400 are lifted upward and enter the lifting cylinder 530. The seeds and agents in the lifting cylinder 530 are lifted above the baffle 510 by the spiral lifting component 400, and fall onto the baffle 510 when there is no restriction from the lifting cylinder 530 above the baffle 510. Since the middle position of the baffle 510 is higher than the edge position, and there is a gap between the baffle 510 and the material cylinder 300, the seeds and agents will roll towards the edge position under the action of gravity after falling above the baffle 510, and fall into the agent below the baffle 510 through the gap to continue mixing. After the seeds and agents are mixed to a certain extent and the coating is completed, the pull ring 610 is pulled upward. The pull ring 610 can pull the sealing member 540 out from the edge position of the baffle 510 above the sealing member 540. The pull ring 610 is connected to multiple pull rods 620 and closures 540 in a one-to-one correspondence. When the pull ring 610 is pulled, the multiple closures 540, which are evenly distributed in a ring around the edge of the baffle 510, can extend simultaneously from the edge of the baffle 510 under the pull of the pull rods 620. The angle between the pull rods 620 and the pull ring 610 is fixed by using fastening nuts 630, thereby controlling the unfolding angle of the pull ring 610 to be constant, and thus fixing the angle between the pull rods 620 and the closures 540, supporting the closures 540. The 0 will not slide downwards, thus fixing the position of the sealing member 540. The sealing member 540 blocks the gap between the baffle 510 and the material cylinder 300. At this time, when the seeds and the agent are lifted together above the baffle 510, the agent lifted above the baffle 510 will fall from the filter hole 511 of the baffle 510 into the agent below the baffle 510. The seeds after coating will remain above the baffle 510, realizing rapid screening after seed coating, thereby improving the seed coating efficiency.

[0050] In summary, this application, by setting up an elevator cylinder 530 and a baffle 510, allows seeds at the bottom of the material cylinder 300 to be conveyed to the top of the baffle 510 via the elevator cylinder 530. After seed coating is completed, the seeds above the baffle 510 are isolated using a sealing member 540, achieving rapid screening of the coated seeds and thus improving the production efficiency of seed coating. A lifting assembly 600 is connected above the sealing member 540. The lifting assembly 600 can simultaneously drive the sealing member 540 to extend from the edge of the baffle 510, and the sealing member 540 is fixed in its current position by a fastening nut 630 in the lifting assembly 600, allowing the sealing member 540 to be fixed without human intervention. The baffle 510 extends outwards, allowing the coated seeds to be better isolated above it. A vibration generator 550 is installed above the baffle 510, which causes the seeds and pesticides to vibrate rapidly above the baffle 510, increasing the probability of the seeds sliding off the edge of the baffle 510 and promoting the pesticides to fall through the filter holes 511, reducing the probability of the pesticides clogging the filter holes 511. The material cylinder 300 is designed as a modular structure separate from the base 100, allowing for direct replacement of the material cylinder 300 when using multiple pesticides to coat seeds, reducing the probability of cross-contamination. It also facilitates thorough cleaning of the material cylinder 300, further reducing the probability of cross-contamination.

[0051] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made according to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A corn seed coating device, comprising a base (100), a drive mechanism (200) mounted inside the base (100), a barrel (300) mounted above the base (100), and a screw lifting assembly (400) mounted in the barrel (300), characterized in that, further comprising a screening assembly (500) mounted inside the barrel (300), the screening assembly (500) comprising a baffle (510) arranged in a circular shape, the baffle (510) having a lower edge position than a middle position, a plurality of filter holes (511) being formed in the baffle (510), a discharge port (512) being formed in the middle of the baffle (510), and a gap being left between the baffle (510) and the inner wall of the barrel (300); a support rod (520) fixedly arranged above the baffle (510) at one end and supported on the inner wall of the barrel (300) at the other end; a lifting cylinder (530) fixedly connected with the baffle (510) above, in communication with the discharge port (512) above, and sleeved on the outside of the screw lifting assembly (400); a closure (540) slidingly / rotatably arranged at the edge of the baffle (510), used to close the gap between the baffle (510) and the barrel (300).

2. A corn seed coating apparatus as defined in claim 1, wherein: A plurality of closures (540) are arranged in a ring shape at the edge of the baffle (510), each of the closures (540) is slidingly connected with the edge of the baffle (510), each of the closures (540) is slidingly arranged below the baffle (510), and a handle is rotatably arranged above each of the closures (540).

3. A corn seed coating apparatus as defined in claim 2, wherein: The closures (540) are arranged in an inclined manner, and the closures (540) are arranged at an obtuse angle with the upper surface of the baffle (510).

4. A corn seed coating apparatus as defined in claim 3, wherein: Further comprising a lifting assembly (600) comprising a pull ring (610) and a pull rod (620) corresponding to each of the closures (540), one end of the pull rod (620) being rotatably connected with the pull ring (610), and the other end being rotatably connected above the corresponding closure (540).

5. A corn seed coating apparatus as defined in claim 4, wherein: A fastening nut (630) is further arranged on the pull ring (610), used to lock the angle of the pull rod (620).

6. A corn seed coating apparatus according to any one of claims 1-5, characterized in that: The inner wall of the barrel (300) is arranged in a funnel shape, and the screw lifting assembly (400) is arranged at the middle position of the barrel (300).

7. A corn seed coating apparatus according to any one of claims 1-5, wherein: The baffle (510) is further provided with a limiting assembly (700), the limiting assembly (700) comprises a fixed part (710) and a rotating part (720), the fixed part (710) is fixedly arranged above the baffle (510), a gap is left between the fixed part (710) and the baffle (510), the rotating part (720) is rotatably arranged below the fixed part (710), the rotating part (720) is coaxially arranged with the screw lifting assembly (400), the rotating part (720) abuts above the screw lifting assembly (400), and the rotating part (720) is used for limiting the screw lifting assembly (400).

8. A corn seed coating apparatus according to any one of claims 1-5, wherein: The base (100) is provided with a clamping assembly (110) and a drive shaft (120) above, the drive shaft (120) is in transmission connection with the driving mechanism (200); The material cylinder (300) is provided with a transmission shaft (310) below, and the transmission shaft (310) is in transmission connection with the screw lifting assembly (400); The material cylinder (300) is fixedly connected with the base (100) through the clamping assembly (110), and the drive shaft (120) and the transmission shaft (310) are in transmission connection.

9. A corn seed coating apparatus according to any one of claims 1-5, wherein: The baffle (510) is further provided with a vibration generator (550).

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