Efficient seed metering device for pelleted seeds
By designing a high-efficiency seed dispensing device for pelleted seeds with the coordinated action of a flow guide cover, a fixed corner baffle, and a flow guide baffle, the problems of low seed dispensing efficiency and easy damage to the pelleting layer were solved, thus achieving efficient and stable seed production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU UNIV
- Filing Date
- 2025-05-29
- Publication Date
- 2026-04-28
AI Technical Summary
Existing pelleted seed metering equipment is inefficient and has a long cycle, and the pelleted layer is easily damaged during the seed scooping process, affecting seed quality and germination rate.
Design a high-efficiency seed dispensing device for pelleted seeds, including a flow guide cover, a fixed corner baffle, a flow guide baffle, and a seed conveying plate. Through the synergistic effect of the flow guide cover and the flow guide baffle, the pelleted seeds can be quickly and efficiently discharged, and the pelleting layer is protected by a flexible buffer design.
It improves the efficiency of pelleted seed dispensing, reduces the damage rate of the pelleting layer, enhances seed quality and germination rate, and reduces labor intensity and production costs.
Smart Images
Figure CN224165151U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a high-efficiency seed metering device for pelleted seeds, belonging to the field of pelleted seed metering technology. Background Technology
[0002] Seed pelleting is a technique that alters the shape, weight, and size of seeds by coating the seed surface with one or more layers of material. It aims to improve seed sowing quality, stress resistance, germination rate, seedling survival rate, and uniformity.
[0003] In seed pelleting, drum pelleting machines are commonly used. This equipment uses the rolling of the drum to mix and coat the seeds with pelleting materials, completing the pelleting process. After pelleting, the seeds need to be discharged and then sent to drying equipment. The discharge process involves scooping the pelleted seeds out of the drum, which is inefficient, time-consuming, and unstable. Furthermore, the pelleted layer on the surface of the seeds is moist and relatively fragile before drying. During the scooping process, collisions and friction between the seeds and the equipment are unavoidable, easily causing damage to the pelleted layer. Once the pelleted layer is damaged, it not only affects the seed's appearance but, more importantly, destroys its functional role, such as reducing its insect-proof, disease-proof, and water-retention effects, lowering germination rates and seedling survival rates, thus affecting crop yield and quality, increasing agricultural production costs and planting risks. Therefore, the inventors have proposed a high-efficiency seed discharge device for pelleted seeds, which can efficiently discharge the pelleted seeds after pelleting and effectively protect them. Utility Model Content
[0004] This invention provides a high-efficiency seed discharge device for pelleted seeds, which can discharge pelleted seeds in a timely manner after pelleting, reducing seed breakage and splashing losses, improving the yield and utilization rate of pelleted seeds, and is simple and efficient.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A high-efficiency seed metering device for pelleted seeds includes a base, a rotary bearing, a drum pot body, a flow guide cover, a fixed corner baffle, a flow guide baffle, a seed conveying plate, and a receiver;
[0007] The top of the drum pot is equipped with a feeding port, and the bottom is mounted on a base via a rotating bearing; the side wall of the drum pot is equipped with a seed discharge port.
[0008] The guide cover completely covers the seed discharge port. One end of the guide cover is a connecting end, and the other end is a free end. The connecting end of the guide cover is hinged to the front end of the seed discharge port on the outside of the drum body, and the free end of the guide cover is movably connected to the rear end of the seed discharge port on the outside of the drum body. In this way, the guide cover can guide the flow when the seed discharge port is open, working together with the guide baffle. When the guide cover is closed, the direction from the connecting end to the free end of the guide cover is consistent with the direction from the front end to the rear end of the seed discharge port.
[0009] The fixed corner baffle is triangular, and one of its sides is the connecting side. The connecting side of the fixed corner baffle is connected to the connecting end on the outside of the guide cover. The length direction of the connecting side is parallel to the direction from the connecting end to the free end on the guide cover. In this way, when the guide cover is opened outward to a certain extent, one side of the fixed corner baffle will abut against the side wall of the drum body, which plays a limiting role.
[0010] One end of the seed conveying plate is a connecting end, and the other end is a free end. The seed conveying plate has a downward sloping structure from the connecting end to the free end, allowing the pelleted seeds to slide freely under gravity. The connecting end of the seed conveying plate is connected to the base below the drum body. The seed conveying plate is located directly below the seed discharge port, that is, when the drum body rotates to the lowest position of the seed discharge port, the seed discharge port is located directly above the seed conveying plate. The free end of the seed conveying plate leads into the inlet of the receiver, so that the pelleted seeds on the seed conveying plate slide into the receiver. The surface of the seed conveying plate is covered with a first elastic layer. The direction from the connecting end to the free end of the guide cover plate overlaps or is parallel to the projection of the direction from the connecting end to the free end of the seed conveying plate on the horizontal plane.
[0011] The guide baffle is installed at an angle on the seed conveying plate, and a guide notch is provided at the center of the bottom of the guide baffle;
[0012] Open the free end of the guide cover and flip it outward until the fixed corner baffle abuts against the outer wall of the drum. At this time, the guide cover and the guide baffle are positioned opposite each other at the front and rear ends of the seed discharge port.
[0013] When the flow guide cover is in the closed state, one side of it faces the inside of the drum pot, which is defined as the inside of the flow guide cover, and the other side faces away from the inside of the drum pot, which is defined as the outside (or back side) of the flow guide cover.
[0014] When the guide cover is flipped outwards and opened to a certain angle, the fixed corner baffle abuts against the outer wall of the drum, preventing the guide cover from flipping outwards further. This creates a seed-dropping angle, which, together with the guide baffle, guides and transports the seeds. The two form a mutually reinforcing structure, guiding the seeds falling from both sides of the seed outlet onto the seed conveying plate. In other words, after the guide cover is opened, it and the guide baffle form a mutually reinforcing angle, working together to simultaneously guide the seeds inside and outside the seed outlet.
[0015] The aforementioned guide cover and guide baffle will not hinder the normal operation of the rolling pot.
[0016] The aforementioned receiving device is used to receive pelleted seeds, and finally the pelleted seeds in the receiving device are sent for drying.
[0017] The aforementioned device ensures rapid and efficient extraction of pelleted seeds while reducing or avoiding damage and loss of the outer shell of the pelleted seeds during seed extrusion.
[0018] The drum pot body is driven to rotate by a motor, and the base can be made into a shell structure, with the motor installed inside the base.
[0019] The above-mentioned device is used in accordance with the following steps:
[0020] Pelletizing process: Seeds and pelletizing materials are added to a drum pan in a specific ratio for pelletizing. The drum pan is driven by a motor to rotate at a speed of 25-30 r / min. Under the action of centrifugal force and friction, the seeds and pelletizing materials are thoroughly mixed and coated, completing the pelletizing process.
[0021] Seed preparation stage: After the pelleting operation is completed, reduce the rotation speed of the drum body. When the seed discharge port reaches the lowest position, the drum body stops rotating (this can be achieved by combining the existing control system with a height sensor. When the rotation stops, if the seed discharge port is not at the lowest position, it can also be assisted by manual rotation to make the seed discharge port reach the lowest position). Open the free end of the guide cover and flip it outward until the fixed corner baffle abuts against the outer wall of the drum body. At this time, the guide cover and the guide baffle are set opposite each other at the front and rear ends of the seed discharge port.
[0022] Seeding Stage: Under the influence of gravity, the pelleted seeds fall directly into the seed conveying plate below through the seed discharge port. The guide cover and guide baffle effectively guide and protect the falling pelleted seeds. The seeds that land on the seed conveying plate pass through the guide notch and fall into the receiver. During the conveying process, due to the flexible buffer design of the seed conveying plate surface, the collision force between the seeds and the seed conveying plate is less than 5N, effectively protecting the integrity of the pelleting layer. After all the pelleted seeds in the drum have been discharged, the guide cover is closed.
[0023] The aforementioned device features a seed discharge port on the drum body and a seed conveying plate below the drum body, enabling seeds to be discharged quickly and smoothly. At the same time, through the synergy of the guide cover, corner baffle, guide baffle, and seed conveying plate, collisions and friction between seeds and the outside world are reduced, the damage rate of pelleted seeds is lowered, and seed quality is improved, providing reliable technical support for efficient and stable seed production in modern agriculture.
[0024] The above-mentioned device effectively improves seed dispensing efficiency. By combining the seed dispensing port with the guide and conveying device, continuous output of pelleted seeds can be achieved.
[0025] The aforementioned device effectively reduces seed damage rate. If a scooping method is used, the pelleted seeds frequently collide and rub against the equipment, easily damaging the still-wet and fragile pelleted layer. This application optimizes the seed dispensing path, allowing seeds to fall directly from the dispensing port into the guiding and conveying components below, reducing unnecessary contact and impact. The conveyor plate uses an elastic layer to control the external force on the seeds at a low level, effectively protecting the protective function of the pelleted layer and ensuring the subsequent germination and growth of the seeds.
[0026] The aforementioned device reduces labor intensity and labor costs, eliminating the arduous task of scooping seeds. It eliminates the need for operators to perform repetitive, high-intensity scooping and transferring actions, significantly reducing labor intensity. Simultaneously, it reduces reliance on manual labor, lowers enterprise labor costs, avoids instability in seeding caused by differences in human operating habits, and improves the standardization and consistency of the production process.
[0027] To improve seed discharge flow, the seed discharge port is square with a 40-60° chamfered edge, creating a smooth, flowing ramp to prevent pelleted seeds from getting stuck at the outlet. In other words, the circumference of the seed discharge port gradually increases from the inside of the drum to the outside, facilitating the smooth discharge of pelleted seeds along the ramp.
[0028] The aforementioned square includes rectangles and squares.
[0029] As one specific implementation scheme, the other end of the guide cover is movably connected to the outer wall of the drum pot body through a pin structure.
[0030] To improve the stability of the device, two corner baffles are used. The two corner baffles have the same structure and are the same size. The two corner baffles are arranged in parallel on both sides of the flow guide cover connection end.
[0031] This application, through the setting of the fixed corner baffle, can play a stable limiting role in the flow guide cover, and has a simple structure, low cost, and is easy to operate and control.
[0032] Open the free end of the guide cover and flip it outwards until the fixed corner baffle abuts against the outer wall of the drum. At this point, the guide cover tilts downwards and the guide baffle tilts upwards, creating a funnel shape that is wider at the top and narrower at the bottom. The opening angle of the guide cover is less than 90°, and the opening angle can be controlled by the angle of the fixed corner baffle.
[0033] As one specific implementation, the bottom of the aforementioned flow guide baffle is connected to the seed conveying plate via two supports, with the space between the two supports forming a flow guide gap. The design of the flow guide gap facilitates the passage of pelleted seeds.
[0034] To better protect falling seeds, the baffle has bends on both sides, forming a groove-like structure, with the bends located on the side facing the baffle cover. This further reduces seed loss.
[0035] To reduce seed loss, baffles or bends are provided on both sides of the upper surface of the seed conveying plate to form a trough-shaped structure.
[0036] To improve the flow guiding effect, the vertical downward projections of the flow guiding cover and the flow guiding baffle both fall on the inner side of the baffle or bend of the seed conveying plate.
[0037] The aforementioned drum pot body is olive-shaped, tapering from the middle to both ends (top and bottom).
[0038] To improve pelleting efficiency and facilitate seeding, an inclined mounting surface with an angle of 40-60° to the vertical direction is provided on one side of the base. The bottom of the drum body is mounted on the inclined mounting surface via a rotary bearing, and the central axis of the drum body is perpendicular to the inclined mounting surface.
[0039] To enhance protection for pelleted seeds, a second elastic layer is provided on the opposite side of both the flow guide cover and the flow guide baffle.
[0040] Both the first and second elastic layers are flexible rubber layers with a thickness of 0.5 mm. This effectively reduces the impact force when the seeds come into contact with the conveying components.
[0041] Any technologies not mentioned in this utility model are based on existing technologies.
[0042] This utility model of a high-efficiency seed pelleting and metering device integrates pelleting, metering, and seed transport through a simple, ingenious, and reasonable structural design. The front and rear guides, along with the soft-surface inclined structure, effectively protect the pelleted seeds while achieving efficient transport without additional power. It is simple, efficient, and provides good protection. Attached Figure Description
[0043] Figure 1 This is an isometric view of the pellet seed high-efficiency seed metering device of this utility model;
[0044] Figure 2 These are the left and right isometric views of the efficient seed metering device for pelleted seeds of this utility model;
[0045] Figure 3 These are the upper and lower isometric views of the efficient seed metering device for pelleted seeds of this utility model;
[0046] Figure 4 This is a front view of the pellet seed high-efficiency seed metering device of this utility model;
[0047] Figure 5 for Figure 1 The left view;
[0048] Figure 6 for Figure 1 The right view;
[0049] Figure 7 for Figure 1 Rear view;
[0050] Figure 8 for Figure 1 Top view;
[0051] In the diagram, 1 is the base, 2 is the drum body, 21 is the seed discharge port, 3 is the guide cover, 4 is the corner baffle, 5 is the guide baffle, 51 is the guide notch, and 6 is the seed conveying plate. Detailed Implementation
[0052] To better understand this utility model, the following embodiments further illustrate the content of this utility model, but the content of this utility model is not limited to the following embodiments.
[0053] The directional terms used in this application, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," are based on the orientation or positional relationship shown in the accompanying drawings or in the usage state, and are used only for the convenience of describing this application. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this application. The connector is omitted in the figures. The unit of measurement for dimensions in the figures is mm, and truer represents radius.
[0054] Example 1
[0055] like Figure 1-8 As shown, a high-efficiency seed metering device for pelleted seeds includes a base, a rotary bearing, a drum pot body, a flow guide cover, a fixed corner baffle, a flow guide baffle, a seed conveying plate, and a receiver.
[0056] The top of the drum pot is equipped with a feeding port, and the bottom is mounted on a base via a rotating bearing; the side wall of the drum pot is equipped with a seed discharge port.
[0057] The guide cover completely covers the seed discharge port. One end of the guide cover is a connecting end and the other end is a free end. The connecting end of the guide cover is hinged to the front end of the seed discharge port on the outside of the drum body, and the free end of the guide cover is movably connected to the rear end of the seed discharge port on the outside of the drum body. When the guide cover is closed, the direction from the connecting end to the free end of the guide cover is the same as the direction from the front end to the rear end of the seed discharge port.
[0058] The fixed corner baffle is triangular, and one of its sides is a connecting side. The connecting side of the fixed corner baffle is connected to the connecting end on the outside of the guide cover. The length direction of the connecting side is parallel to the direction from the connecting end to the free end on the guide cover.
[0059] One end of the seed conveying plate is a connecting end, and the other end is a free end. The seed conveying plate has a downward sloping structure from the connecting end to the free end. The connecting end of the seed conveying plate is connected to the base below the drum body. The seed conveying plate is located directly below the seed discharge port. The free end of the seed conveying plate leads into the inlet of the receiver. The surface of the seed conveying plate is covered with a first elastic layer. The direction from the connecting end to the free end of the guide cover plate overlaps with or is parallel to the projection of the direction from the connecting end to the free end of the seed conveying plate on the horizontal plane.
[0060] The guide baffle is installed at an angle on the seed conveying plate, and a guide notch is provided at the center of the bottom of the guide baffle;
[0061] Open the free end of the guide cover and flip it outwards until the fixed corner baffle abuts against the outer wall of the drum body. At this point, the guide cover and the guide baffle are positioned opposite each other at the front and rear ends of the seed discharge port. The drum body is driven to rotate by a motor. The base can be made into a shell structure, and the motor is installed inside the base.
[0062] When the guide cover is flipped outward and opened to a certain angle, the fixed corner baffle abuts against the outer wall of the drum body, and the guide cover cannot continue to flip outward, forming a seed dropping angle. Together with the guide baffle, it plays the role of guiding and transporting seeds. The two are mutually supportive and work together to guide the seeds falling on both sides of the seed discharge port to the seed transport plate.
[0063] The above-mentioned device is used in accordance with the following steps:
[0064] Pelletizing process: Seeds and pelletizing materials are added to a drum pan in a specific ratio for pelletizing. The drum pan is driven by a motor to rotate at a speed of 25-30 r / min. Under the action of centrifugal force and friction, the seeds and pelletizing materials are thoroughly mixed and coated, completing the pelletizing process.
[0065] Seed preparation stage: After the pelleting operation is completed, reduce the rotation speed of the drum body. When the seed discharge port reaches the lowest position, the drum body stops rotating (this can be achieved by combining the existing control system with a height sensor. When the rotation stops, if the seed discharge port is not at the lowest position, it can also be assisted by manual rotation to make the seed discharge port reach the lowest position). Open the free end of the guide cover and flip it outward until the fixed corner baffle abuts against the outer wall of the drum body. At this time, the guide cover and the guide baffle are set opposite each other at the front and rear ends of the seed discharge port.
[0066] Seeding Stage: Under the influence of gravity, the pelleted seeds fall directly into the seed conveying plate below through the seed discharge port. The guide cover and guide baffle effectively guide and protect the falling pelleted seeds. The seeds that land on the seed conveying plate pass through the guide notch and fall into the receiver. During the conveying process, due to the flexible buffer design of the seed conveying plate surface, the collision force between the seeds and the seed conveying plate is less than 5N, effectively protecting the integrity of the pelleting layer. After all the pelleted seeds in the drum have been discharged, the guide cover is closed.
[0067] The aforementioned device features a seed discharge port on the drum body and a seed conveying plate below the drum body, enabling seeds to be discharged quickly and smoothly. At the same time, through the synergy of the guide cover, corner baffle, guide baffle, and seed conveying plate, collisions and friction between seeds and the outside world are reduced, the damage rate of pelleted seeds is lowered, and seed quality is improved, providing reliable technical support for efficient and stable seed production in modern agriculture.
[0068] The aforementioned device ensures rapid and efficient extraction of pelleted seeds while reducing or avoiding damage and loss of the outer shell of the pelleted seeds during seed extrusion.
[0069] Example 2
[0070] Based on Example 1, the following improvements were made: In order to improve the smoothness of seed dispensing, the seed dispensing port is square and the edge of the seed dispensing port is designed with a 45° chamfer to form a smooth transition guide slope, so as to avoid the pelleted seeds getting stuck at the outlet.
[0071] Example 3
[0072] Based on Example 2, the following improvements were made: the other end of the guide cover is movably connected to the side wall of the drum body via a pin structure (existing movable buckle structures can also be used). To improve the stability of the device, two fixed corner baffles are used. The two fixed corner baffles have the same structure and are equal in size, and are arranged parallel to each other on both sides of the connecting end of the guide cover. The free end of the guide cover is opened and flipped outward until the fixed corner baffle abuts against the outer side wall of the drum body. At this time, the guide cover is tilted downward and the guide baffle is tilted upward. That is, a funnel shape is formed between the guide cover and the guide baffle, which is larger at the top and smaller at the bottom. In this example, the opening angle of the guide cover is 75°. Figure 4 As shown, the angle between the flow guide cover and the flow guide baffle and the vertical direction is about 15°.
[0073] Example 4
[0074] Based on Example 3, the following improvements were further made: Figure 1-3 As shown, the bottom of the flow guide baffle is connected to the seed conveying plate by two legs, and the space between the two legs forms a flow guide notch. The design of the flow guide notch facilitates the passage of pelleted seeds.
[0075] Example 5
[0076] Based on Example 4, the following improvements were made: To better protect the falling seeds, the guide baffle has bends on both sides, forming a groove-shaped structure, with the bends on the side facing the guide cover. This further reduces seed loss. To reduce seed loss, baffles or bends forming a groove-shaped structure are provided on both sides of the upper surface of the seed conveying plate. To improve the guiding effect, the vertical downward projections of the guide cover and the guide baffle both fall on the inner side of the baffles or bends of the seed conveying plate.
[0077] Example 6
[0078] Based on Example 5, the following improvements were made: The drum pot body is an olive shape that tapers from the middle to both ends (top and bottom). To improve the pelleting effect and facilitate seed dispensing, a mounting slope at a 45° angle to the vertical direction is provided on the top of one side of the base. The bottom of the drum pot body is mounted on the mounting slope via a rotating bearing, and the central axis of the drum pot body is perpendicular to the mounting slope. To improve the protection of the pelleted seeds, a second elastic layer is provided on the opposing sides of the guide cover and guide baffle. Both the first and second elastic layers are flexible rubber layers with a thickness of 0.5 mm. This effectively reduces the impact force when the seeds come into contact with the conveying components. The seed dispensing port is a rectangle of 130 × 110 mm.
[0079] The above-mentioned device is used for pelleting cabbage seeds: 4 kg of cabbage seeds and 12 kg of pelleting material are put into the drum pot, and the drum pot is driven by a motor at 30 r / min for pelleting. After pelleting, the seed discharge port is adjusted to the lowest position, and the guide cover is opened. The guide cover and guide baffle are positioned opposite each other at the front and rear ends of the seed discharge port to guide and protect the pelleted seeds. Under the action of gravity, the seeds fall through the seed discharge port into the seed conveying plate and are transported to the receiving device. The entire seed discharge process takes 5 minutes, which is 3 times more efficient than manual seed scooping, and the seed damage rate is only 2%.
[0080] The above-mentioned device was used for sorghum seed pelleting: 4 kg of sorghum seeds and 10.5 kg of pelleting material were added to the drum pelleting pot, and the drum pelleting pot was driven by a motor at 30 r / min for pelleting. After pelleting, the seed discharge port was adjusted to its lowest position, and the guide cover was opened. The guide cover and guide baffle were positioned opposite each other at the front and rear ends of the seed discharge port to guide and protect the pelleted seeds. Under the action of gravity, the seeds fell through the seed discharge port into the seed conveying plate and were transported to the receiving device. The measured seed discharge time was 5 minutes, and the seed pelleting coating integrity rate was 98.2%.
[0081] The above-described pelleted seed high-efficiency seed metering devices have the following significant advantages:
[0082] Significantly improved seed dispensing efficiency and production effectiveness: Using a scooping method, the amount scooped at one time is limited (approximately 0.25-0.5 kg), and there are pauses during scooping, transferring, and dumping, resulting in a seed dispensing time of at least 0.5 hours for a single batch (30 kg). This invention achieves continuous and stable seed dispensing of pelleted seeds through a combination design of a seed dispensing port on the bottom wall of the drum, a coordinated bidirectional flow guide, and a seed conveying plate. Actual testing shows that when processing the same 30 kg of pelleted seeds, the seed dispensing time is reduced by approximately 2 / 3 of the time.
[0083] Significantly enhanced seed quality assurance: When using a scooping method, frequent collisions between pelleted seeds and the equipment result in a 10% damage rate to the seed coating. This invention, through a 45° angled guide surface at the seed outlet and a flexible rubber layer (0.5mm thick) on the conveyor plate, controls the impact force on the seeds during the dispensing process to within 5N. Statistical testing shows that the damage rate of pelleted seeds is reduced to below 3%, effectively protecting the insect-proof, antibacterial, and water-retaining slow-release functions of the pelleting layer, significantly enhancing the commercial value of the seeds.
[0084] Labor costs and production risks are significantly reduced: If scooping seeds is used, at least two operators are required, and there are issues of efficiency fluctuations due to operator fatigue and differences in skill level. This invention, using the seed dispensing port and seed conveying plate, can reduce labor input by at least half, significantly lowering labor costs. At the same time, it avoids production accidents such as seed spillage and blockages caused by human error, significantly improving production stability.
[0085] Simplified procedures and improved ease of operation: Manual seed scooping involves multiple steps such as scooping, transferring, pouring, and cleaning, making the process cumbersome and time-consuming. This invention achieves a streamlined process of "pillification completion - seed scooping" through the integrated design of the seed outlet and conveyor plate device, reducing the number of operational steps.
Claims
1. A high-efficiency seed metering device for pelleted seeds, characterized in that: Includes a base, rotary bearing, drum body, flow guide cover, corner baffle, flow guide baffle, seed conveying plate, and receiver; The top of the drum pot is equipped with a feeding port, and the bottom is mounted on a base via a rotating bearing; the side wall of the drum pot is equipped with a seed discharge port. The guide cover completely covers the seed discharge port. One end of the guide cover is a connecting end and the other end is a free end. The connecting end of the guide cover is hinged to the front end of the seed discharge port on the outside of the drum body, and the free end of the guide cover is movably connected to the rear end of the seed discharge port on the outside of the drum body. The direction from the connecting end to the free end of the guide cover is the same as the direction from the front end to the rear end of the seed discharge port. The fixed corner baffle is triangular, and one of its sides is a connecting side. The connecting side of the fixed corner baffle is connected to the connecting end on the outside of the guide cover. The length direction of the connecting side is parallel to the direction from the connecting end to the free end on the guide cover. One end of the seed conveying plate is a connecting end and the other end is a free end. The seed conveying plate has a downward sloping structure from the connecting end to the free end. The connecting end of the seed conveying plate is connected to the base below the drum body. The seed conveying plate is located directly below the seed discharge port. The free end of the seed conveying plate leads into the inlet of the receiver. The surface of the seed conveying plate is covered with a first elastic layer. The guide baffle is installed at an angle on the seed conveying plate, and a guide notch is provided at the center of the bottom of the guide baffle; Open the free end of the guide cover and flip it outward until the fixed corner baffle abuts against the outer wall of the drum. At this time, the guide cover and the guide baffle are positioned opposite each other at the front and rear ends of the seed discharge port.
2. The high-efficiency seed metering device for pelleted seeds according to claim 1, characterized in that: The seed discharge port is square, and the edges of the seed discharge port are designed with a 40-60° chamfer to form a smooth transition guide slope.
3. The high-efficiency seed metering device for pelleted seeds according to claim 1 or 2, characterized in that: The other end of the guide cover is movably connected to the side wall of the drum pot body through a pin structure; the free end of the guide cover is opened and flipped outward until the fixed corner baffle abuts against the outer side wall of the drum pot body. At this time, the guide cover is tilted downward and the guide baffle is tilted upward, forming a funnel shape with a larger top and a smaller bottom between the guide cover and the guide baffle.
4. The high-efficiency seed metering device for pelleted seeds according to claim 1 or 2, characterized in that: There are two corner baffles, which are identical in structure and size, and are arranged in parallel on both sides of the flow guide cover connection end.
5. The high-efficiency seed metering device for pelleted seeds according to claim 1 or 2, characterized in that: The bottom of the flow guide baffle is connected to the seed conveying plate by two legs, and the space between the two legs forms a flow guide gap.
6. The high-efficiency seed metering device for pelleted seeds according to claim 1 or 2, characterized in that: The flow guide baffle has bends on both sides to form a groove structure, with the bends on the side facing the flow guide cover.
7. The high-efficiency seed metering device for pelleted seeds according to claim 1 or 2, characterized in that: The seed conveying plate has baffles or bends on both sides of its upper surface to form a groove-shaped structure.
8. The high-efficiency seed metering device for pelleted seeds according to claim 7, characterized in that: The vertical downward projections of the flow guide cover and the flow guide baffle both fall on the inner side of the baffle or bend of the seed conveying plate.
9. The high-efficiency seed metering device for pelleted seeds according to claim 1 or 2, characterized in that: Both the flow guide cover and the flow guide baffle have a second elastic layer on their opposite sides; both the first elastic layer and the second elastic layer are flexible rubber layers with a thickness of 0.5 mm.
10. The high-efficiency seed metering device for pelleted seeds according to claim 1 or 2, characterized in that: The drum pot body is olive-shaped, tapering from the middle to both ends; the top of one side of the base is provided with an installation slope at an angle of 40 to 60 degrees to the vertical direction, and the bottom of the drum pot body is mounted on the installation slope through a rotating bearing, with the central axis of the drum pot body perpendicular to the installation slope.