Axial-flow air-suction type seed-metering device based on carrot seeding machine

Abstract

The utility model discloses an axial flow air suction type seed-metering device based on a carrot seeder, which comprises a seed cavity shell, a seed taking disc, a seed-metering device shaft, a duckbilled roller and a vacuum chamber baffle disc, the seed-metering device shaft sequentially penetrates through the center of the duckbilled roller, the center of the vacuum chamber baffle disc, the center of the seed taking disc and the center of the seed cavity shell, and the vacuum chamber baffle disc is arranged in the seed cavity shell. The vacuum chamber baffle disc is connected with the seed taking disc to form a vacuum chamber, a through hole is formed in the center of the seed metering device shaft, and a circumferential hole communicated with the through hole is formed in the shaft section, opposite to the vacuum chamber, of the seed metering device shaft. The seed-metering device shaft of the axial-flow air-suction type seed-metering device of the carrot seeding machine is internally provided with a unique air flow channel, so that the seed-metering device shaft is not easy to block, and the maintenance cost of a user in the use process is reduced. The device is simple in structure, firm in seed adsorption and high in adsorption precision, plays a role in transmitting negative pressure of an air chamber, is easy to seal well, is not easy to wear parts, effectively avoids the phenomenon of seed breakage during seed brushing, and improves the seed taking precision.

Description

Technical Field

[0001] The utility model relates to the technical field of siliconization equipment, in particular to an axial flow air suction type seed metering device based on a carrot seeder. Background Art

[0002] Carrots are widely grown in my country. Promoting mechanized carrot planting is conducive to solving the problem of increasing labor shortage in rural my country, reducing production costs and improving the market competitiveness of carrots. However, the mismatch between agricultural machinery and agronomy is a bottleneck restricting the mechanized planting of carrots.

[0003] Currently, carrot sowing in my country is primarily done through row sowing and hole sowing. With the increasing demand for precision agronomic cultivation, carrots are increasingly reliant on hole sowing, as this method effectively and precisely controls seed placement and plant spacing, resulting in uniform, even, and strong seedlings, saving seeds, and reducing post-production management and labor. The hole sowing meter is a key component of a carrot seeder, and its performance directly impacts the overall quality of the seeder. Based on their operating principle, hole sowing metering devices are categorized as mechanical or pneumatic. The pneumatic type offers superior versatility, offering advantages such as seed protection, precise seed removal, accurate sowing, and high efficiency. Therefore, the application and promotion of the pneumatic sowing method is of great significance to the mechanized sowing of carrots.

[0004] The current air-suction hole-seeding seeding device used for carrots has a large requirement for negative pressure, the seeds are not firmly adsorbed, and the adsorption accuracy is unstable; the seeding device is blocked; static electricity is generated in the seed box due to collision and friction, and the seeds are not easily adsorbed and dropped, and the seeding performance is poorly stable, which easily leads to missed seeds and empty holes; the seeds are crushed and crushed; and the sowing quality cannot be automatically monitored. Utility Model Content

[0005] To this end, one purpose of the present invention is to propose an axial flow air suction seed metering device based on a carrot seeder to solve the problems mentioned in the background technology and overcome the shortcomings of the existing technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an axial flow air suction type seed metering device based on a carrot seeder, preferably comprising a seed cavity shell, a seed taking plate, a seed metering device shaft, a duckbill roller and a vacuum chamber stop plate, the seed metering device shaft passes through the center of the duckbill roller, the center of the vacuum chamber stop plate, the center of the seed taking plate and the center of the seed cavity shell in sequence, the vacuum chamber stop plate is connected to the seed taking plate to form a vacuum chamber, the seed cavity shell is connected to the duckbill roller, a through hole is provided in the center of the seed metering device shaft, and a circumferential hole connected to the through hole is provided on the shaft section of the seed metering device shaft opposite to the vacuum chamber.

[0007] In any of the above schemes, it is preferred that a seed cleaner is further included, which is arranged in the vacuum chamber, one end of the seed cleaner is connected to the seed metering device shaft, and the other end of the seed cleaner is provided with an air cut-off block, which cooperates with the suction hole on the seed tray.

[0008] In any of the above schemes, it is preferred that a seed brush is provided on one side of the seed cavity shell close to the seed removal plate, the seed brush is in the shape of a curved long strip, and a serrated groove is provided on the seed brush.

[0009] In any of the above schemes, it is preferred that a sealing device is further included, the sealing device includes a sealing disk and a sealing ring, the sealing disk is connected to the seed taking disk by bolts, and the sealing ring is used to seal between the sealing disk and the seed metering device shaft.

[0010] In any of the above schemes, it is preferred that the seed cavity shell is made of transparent material and forms a seed storage chamber with the seed tray, and also includes a duckbill device and a belt assembly. The belt assembly is mounted on the outside of the seed storage chamber, and the belt assembly is provided with multiple duckbill devices along the circumferential direction.

[0011] In any of the above solutions, preferably, the duckbill roller is sleeved on the outside of the belt assembly.

[0012] In any of the above solutions, it is preferred that a digger cover is included, and the digger cover is connected to the vacuum chamber baffle.

[0013] In any of the above solutions, preferably, agitating spikes arranged in a circle are provided at the center of the seed tray.

[0014] In any of the above solutions, preferably, a through-beam optical fiber sensor is fixed to the seeding port of the seed cavity housing.

[0015] In any of the above solutions, it is preferred that the seed cavity shell is connected to the hollow hole sowing and metering device shaft through a flat key.

[0016] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0017] The carrot planter's axial-flow pneumatic seed metering mechanism features a unique internal airflow channel, ensuring smooth flow of seeds into the seeding hole without clogging. This design significantly improves seeding efficiency and accuracy, while reducing maintenance costs.

[0018] 2. The seeding device shaft of the axial flow air suction seeding device of this carrot seeder has a simple structure, strong seed adsorption, high adsorption accuracy, and the seeding device is not easy to be blocked. It plays the role of transmitting the negative pressure of the air chamber. The seeding device shaft is fixed and the air chamber rotates, which is easy to seal well and the parts are not easy to wear.

[0019] 3. The seed brush removes excess seeds to ensure that single seeds are firmly adsorbed by the seed suction hole. The air-off block on the seed cleaner fits precisely on the seed tray, and the seeds that are not completely separated are hung off, effectively avoiding the phenomenon of seed breakage during seed brushing and improving the seed collection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic exploded view of the structure of an axial flow air suction type seed metering device based on a carrot seeder according to an embodiment of the present utility model;

[0022] Figure 2 According to the embodiment of the utility model, an axial flow air suction type seed metering device based on a carrot seeder is provided. Figure 1 The structural diagram of the seed meter shaft shown in ;

[0023] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0024] Figure 4 According to the embodiment of the utility model, an axial flow air suction type seed metering device based on a carrot seeder is provided. Figure 1 The structural diagram of the seed brush shown in ;

[0025] Figure 5 for Figure 4 A front view of the seed brush shown;

[0026] Figure 6 According to the embodiment of the utility model, an axial flow air suction type seed metering device based on a carrot seeder is provided. Figure 1 The schematic diagram of the structure of the seed tray and the seed cleaner shown in FIG;

[0027] Figure 7 for Figure 6 The front view of the seed tray and seed cleaner shown.

[0028] Among them: 1. Seed chamber shell; 2. Seed plate; 3. Seeder shaft; 4. Duckbill roller; 5. Vacuum chamber stop plate; 6. Circumferential hole; 7. Seed cleaner; 8. Air cut-off block; 9. Air suction hole; 10. Seed brush; 11. Sealing plate; 12. Sealing ring; 13. Duckbill device; 14. Belt assembly; 15. Seeder cover; 16. Seed stirring pin; 17. Through hole; 18. Sawtooth. DETAILED DESCRIPTION

[0029] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] In order to achieve the above purpose, Figures 1 to 7 As shown, the utility model provides an axial flow air suction seed metering device based on a carrot seeder, comprising a seed chamber shell 1, a seed taking plate 2, a seed metering device shaft 3, a duckbill drum 4 and a vacuum chamber stop plate 5. The seed metering device shaft 3 passes through the center of the duckbill drum 4, the center of the vacuum chamber stop plate 5, the center of the seed taking plate 2 and the center of the seed chamber shell 1 in sequence. The vacuum chamber stop plate 5 is connected to the seed taking plate 2 to form a vacuum chamber. The seed chamber shell 1 is connected to the duckbill drum 4. A through hole 17 is provided in the center of the seed metering device shaft 3. A circumferential hole 6 connected to the through hole 17 is provided on the shaft section of the seed metering device shaft 3 opposite to the vacuum chamber.

[0032] The seed tray 2 is circular and has a plurality of seed suction holes distributed along the circumference. The seeds are sucked into the seed suction holes by the suction force of the vacuum chamber. One end of the seed metering device shaft 3 connected to the seed tray 2 is solid, and the other end is provided with a through hole 17, which is connected to the vacuum pump. There are multiple circumferential holes 6 evenly distributed on the seed metering device shaft 3.

[0033] The seed chamber housing 1 and the seed tray 2 form a seed storage chamber, which is divided into three areas: a seed filling area, a seed cleaning area, and a seed carrying area. The seed filling area is equipped with a seed inlet. Seeds in the seed box enter the seed filling area through a seed delivery hose and the seed inlet. One end of the seed meter shaft 3 is connected to the seed chamber housing 1, and the other end of the seed meter is mounted on the bottom cover of the vacuum chamber via a bearing support. The vacuum chamber stop plate 5 is the skeleton of the seed meter, supporting the bearing, shaft, and forming a vacuum chamber. Its inner cavity and the seed tray 2 cooperate to form a vacuum chamber. A groove is designed at the outer edge of the seed tray 2 to accommodate an O-ring 12. The vacuum chamber stop plate 5 and the seed tray 2 are connected by screws and tightly connected to the seed meter shaft 3. The seed meter shaft 3 is fixed. Air pressure is transmitted to the vacuum chamber through the through hole 17 and the circumferential hole 6 on the seed meter shaft 3. A pressure difference is formed on both sides of the seed tray 2, adsorbing the seeds on the seed tray 2. There is track in the seed-carrying area, and when the seed-sucking hole on the seed-taking tray 2 passes through the air-breaking block 8, the carrot seeds in the seed-sucking hole are scraped off.

[0034] Furthermore, it also includes a seed cleaner 7, which is arranged in the vacuum chamber, one end of the seed cleaner 7 is connected to the seed metering device shaft 3, and the other end of the seed cleaner 7 is provided with an air cut-off block 8, which cooperates with the air suction hole 9 on the seed plate 2.

[0035] The seed cleaner 7 is fixed to the seed meter shaft 3 by screws. As the seed disc 2 rotates, when the seed suction hole passes the air cut-off block 8, the seed cleaner 7 will promptly and forcibly scrape off the seeds that are not completely separated. Under the action of the spring, the cylindrical surface of the seed cleaner 7 is always precisely fitted on the seed disc 2, effectively avoiding the phenomenon of seed breakage during brushing.

[0036] Furthermore, a seed brush 10 is provided on one side of the seed chamber shell 1 close to the seed plate 2. The seed brush 10 is in the shape of a curved long strip and is provided with a sawtooth groove 18.

[0037] The seed brush 10 continuously and slightly collides and knocks to remove excess seeds, leaving only one seed at the seed suction hole. The curved sawtooth 18 seed brush 10 removes excess seeds, ensuring that the single seed is firmly adsorbed by the seed suction hole.

[0038] Furthermore, a sealing device is included, which includes a sealing disk 11 and a sealing ring 12. The sealing disk 11 is connected to the seed plate 2 through bolts, and the sealing ring 12 is used to seal between the sealing disk 11 and the seed metering device shaft 3.

[0039] Specifically, the seed cavity shell 1 is made of transparent material and forms a seed storage chamber with the seed plate 2. It also includes a duckbill device 13 and a belt assembly 14. The belt assembly 14 is mounted on the outside of the seed storage chamber. The belt assembly 14 is provided with multiple duckbill devices 13 along the circumferential direction.

[0040] The belt assembly 14 is a circular ring structure with a seed feed channel on the inside. Multiple seed delivery mechanisms connected to the seed feed channel are located on the outside of the ring. The seed delivery mechanisms are connected to the duckbill device 13. The seed feed channel combination is an effective measure to improve seed delivery accuracy, thereby ensuring seed delivery accuracy. The belt assembly 14 is positioned and mounted on the bottom cover of the vacuum chamber via bolts and a pressure plate. The axial flow air suction type hole seeding device relies on pressure differential to absorb carrot seeds. After the pressure differential disappears, the seeds fall into the seed feed channel during rotation and then enter the seed delivery mechanism under the action of gravity. During the next rotation, the carrot seeds enter the duckbill device 13 from the seed delivery mechanism to complete seeding.

[0041] Furthermore, the duckbill roller 4 is sleeved on the outside of the belt assembly 14 .

[0042] Furthermore, the device further comprises a seed drill cover 15 , which is connected to the vacuum chamber baffle 5 .

[0043] Specifically, the center of the seed tray 2 is provided with seed stirring pins 16 arranged in a circle.

[0044] During rotation, the seed stirring pins 16 agitate the seeds, increasing their fluidity and ensuring a continuous supply of seeds to the seed filling area. The seed stirring pins 16 regularly and continuously stir and loosen the seed population within the seed filling chamber, facilitating seed removal from the seed tray 2. Simultaneously, the impact creates vibrations in the seed suction holes, reducing the absorption of excess seeds. The shape and size of the suction holes significantly influence the performance of the air-suction seed drill. They are conical in shape, with sixteen suction holes.

[0045] Specifically, a beam-type optical fiber sensor is fixed to the seeding port of the seed cavity housing 1 .

[0046] At the same time, a beaming optical fiber sensor is installed at the seeding port of the seed cavity housing 1 of the seed meter to detect missed seeds.

[0047] Specifically, the seed cavity shell 1 is connected to the hollow hole sowing and metering device shaft 3 through a flat key.

[0048] The axial flow air suction seed metering device based on the carrot seeder of the utility model works as follows:

[0049] During operation, the negative pressure generated by the fan is transmitted through the seed meter shaft to the air chamber, creating a high vacuum. This creates a pressure differential on both sides of the seed tray, causing the seeds to be attracted to the tray. As the tray rotates, the seeds are continuously and lightly knocked by the seed brush, removing excess seeds and leaving only a single seed at the seed intake hole. When a single seed on the seed tray moves to the seeding position, a shut-off block within the air chamber blocks the hole, eliminating the negative pressure in the seed intake hole. Simultaneously, the seed cleaner contacts the seed, separating it from the seed tray intake hole, achieving a single seeding. The seed falls smoothly onto the belt assembly under the combined effects of gravity, inertial centrifugal force, and the thrust of the seed cleaner. As the seed rotates, once the friction between the seed and the inner wall of the belt assembly is overcome, it slides along the inner wall of the belt assembly and is blocked by the seed retaining plate, falling into the seed channel. The seeds continue to roll along the seed channel. When they pass the vertical position, they overcome the friction with the seed channel wall and fall into the duckbill in advance. Then, they roll along the duckbill and fall to the end of the duckbill, ready for planting. When the duckbill of the hole-forming device enters the soil to open the hole, the dynamic duckbill is pressed open, and the seeds fall accurately into the bottom of the hole, achieving secondary planting and completing a planting cycle.

[0050] This utility model provides an axial flow air suction seed meter for a carrot planter. The seed meter shaft is the core component, with a simple structure, and serves to transmit the negative pressure of the air chamber. The hollow hole seed meter shaft is fixed, while the air chamber rotates, making it easy to seal.

[0051] 2. The utility model provides an axial flow air suction seed meter based on a carrot seeder. A through-beam optical fiber sensor is installed at the seeding port of the seed cavity shell of the seed meter to detect missed seeds, which can basically solve the problem of automatic monitoring of seeding quality.

[0052] 3. The utility model provides an axial flow air suction type seed metering device based on a carrot seeder. The shapes and numbers of the seed stirring pins and the seed suction holes on the seed plate are determined according to the conditions of the carrot seeds.

[0053] The utility model uses a movable dividing block with a spring to meet the use requirements of irregular-shaped parts products to be clamped first and then assembled, saving equipment costs for the company.

[0054] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0055] Those skilled in the art will readily understand that the present invention encompasses any combination of the components described in the above specification and the detailed description, as well as the components shown in the accompanying drawings. Due to space limitations and to maintain clarity, not all of the various solutions resulting from these combinations are described. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

[0056] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are illustrative and should not be construed as limiting the present invention. Those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An axial flow air suction seed metering device based on a carrot seeder, characterized in that: It includes a seed cavity shell, a seed removal disk, a seed metering device shaft, a duckbill roller and a vacuum chamber stop disk. The seed metering device shaft passes through the center of the duckbill roller, the center of the vacuum chamber stop disk, the center of the seed removal disk and the center of the seed cavity shell in sequence. The vacuum chamber stop disk is connected to the seed removal disk to form a vacuum chamber. The seed cavity shell is connected to the duckbill roller. A through hole is provided in the center of the seed metering device shaft. A circumferential hole connected to the through hole is provided on the shaft section of the seed metering device shaft opposite to the vacuum chamber.

2. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: It also includes a seed cleaner, which is arranged in the vacuum chamber, one end of the seed cleaner is connected to the seed metering device shaft, and the other end of the seed cleaner is provided with an air cut-off block, which cooperates with the suction hole on the seed plate.

3. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: A seed brush is provided on one side of the seed cavity shell close to the seed plate. The seed brush is in a curved long strip shape and is provided with a serrated groove.

4. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: It also includes a sealing device, which includes a sealing disk and a sealing ring. The sealing disk is connected to the seed taking disk through bolts, and the sealing ring is used to seal between the sealing disk and the seed metering device shaft.

5. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: The seed cavity shell is made of transparent material and forms a seed storage chamber with the seed tray. It also includes a duckbill device and a belt assembly. The belt assembly is sleeved on the outside of the seed storage chamber. The belt assembly is provided with multiple duckbill devices along the circumferential direction.

6. The axial flow air suction seed metering device of the carrot planter according to claim 5, characterized in that: The duckbill roller is sleeved on the outside of the waist belt assembly.

7. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: It also includes a digging device cover, which is connected to the vacuum chamber baffle.

8. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: The center of the seed taking plate is provided with seed stirring nails arranged in a circle.

9. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: A counter-radiation optical fiber sensor is fixed on the seeding port of the seed cavity shell.

10. The axial flow air suction seed metering device of the carrot planter according to claim 1, characterized in that: The seed cavity shell is connected to the seed meter shaft via a flat key.

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