Small-particle seed air-blast type shooting seed metering device

Abstract

The application discloses a small-particle-size seed air-blowing type shooting and sowing seed metering device, and relates to the field of agricultural machinery, in particular to a seed metering device which realizes precise and efficient sowing of small-particle-size seeds by means of air blowing and shooting into soil, and is beneficial to precise and efficient sowing of small-particle-size seeds.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, specifically to a seed metering device that uses air blowing to achieve precision seeding and injection of small-diameter seeds into the soil. Background Technology

[0002] Compared to mechanical seed meters, air-blown seed meters cause less damage to seeds and have a wider range of applications, making them a current research focus in precision seed metering. Air-blown seed meters offer advantages such as strong adaptability, good versatility, no seed damage, and less stringent requirements on seed shape and size. However, due to the relatively late start of precision seeding in China, the application of pneumatic precision seed meters, especially for small-diameter seeds, is limited. Currently, pneumatic precision seed meters for small-diameter vegetables are mainly air-suction type. Taking stem mustard seeds as the research object, their average equivalent diameter is about 1.3 mm, and the weight of a single seed is about 1.6 g. If free fall is used, the sowing uniformity is low, the operating speed is uncontrollable, and the operating mechanism of pneumatic seed metering for small-diameter seeds is not yet clear, resulting in limited research. Therefore, this study designs and researches an air-blown seed metering device for small-diameter seeds, using a forced air-blown seeding method to achieve precise and high-speed sowing of small-diameter seeds. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a small-diameter seed air-blowing seed metering device, which is conducive to achieving precise and efficient seeding of small-diameter seeds.

[0004] A small-diameter seed air-blowing seed metering device, characterized in that it includes: a seed metering device, a seeding guide tube, an air inlet pipe connector, a seed filling component, a seed box, and a drive assembly, wherein the seed box is fixedly installed on the seed metering device; the seeding guide tube is fixedly installed on the seed metering device; and the drive assembly is installed inside the seed metering device.

[0005] As a further limitation of this technical solution, the seed metering device includes a front cover, a rear cover, an end cover opening, a seed metering disc, a seed cleaning brush, and a constraint brush; the front cover is fixedly connected to the rear cover; the front cover is provided with a seed metering opening; the seed metering disc is fixedly disposed between the front cover and the rear cover; the seed metering disc is provided with a plurality of shaped holes 1, which are evenly distributed circumferentially on the arc-shaped wall surface of the seed metering disc; the seed cleaning brush and the constraint brush are fixedly connected to the rear cover; the seed cleaning brush is used to clean excess seeds in the shaped holes 1; and the constraint brush is used to constrain the seeds. The movement of the seed in the seed metering tray, the included angle between the seed cleaning brush and the constraint brush is 135°, restricting the seed filling area, the seed filling component includes a flow control valve, a valve control linkage and a seed filling box; the flow control valve is fixedly connected to the rear end cover, the valve control linkage is fixedly connected to the flow control valve; the valve control linkage is rotatably connected to the rear end cover, the rear end cover is provided with an opening, the valve control linkage passes through the opening and can swing in the opening, the seed filling box is fixedly connected to the rear end cover, and the flow control valve is disposed in the seed filling box.

[0006] As a further limitation of this technical solution, the seeding conduit includes a seeding tube duct connector, a seeding tube, and a seeding tube. The seeding tube duct connector is located at one end of the seeding tube, and the seeding tube is fixedly installed at the other end of the seeding tube. The seeding tube is r-shaped, and its third end is fixedly passed through the arc-shaped wall of the front end cover. The third end of the seeding tube corresponds to the position of the seed outlet. The seeding tube connector is connected to a high-pressure blower, which is used to blow out a high-speed airflow.

[0007] As a further limitation of this technical solution, the driving assembly includes a driving motor, a driving blade, and a driving blade fixing cover. The driving motor is fixed inside the motor bracket, and the motor bracket is fixed in the center of the rear end cover. The motor shaft of the driving motor is fixedly connected to the central shaft of the driving blade. The driving blade is covered and fixed with the driving blade fixing cover. The driving blade fixing cover is fixedly disposed in the center of the seed metering disc. The seed metering disc rotates as the driving blade rotates due to the fixing of the driving blade fixing cover with the driving blade, the motor shaft, and the seed metering disc.

[0008] As a further limitation of this technical solution, the rear end cover is provided with an inlet for seeding.

[0009] As a further limitation of this technical solution, an air inlet pipe connector is installed on the rear end cover, and the air inlet pipe connector is connected to a high-pressure blower.

[0010] Compared with the prior art, the advantages and positive effects of the present invention are:

[0011] 1. The seed metering device mentioned in this invention can achieve precise seeding of small-diameter vegetable seeds such as stem mustard according to agronomic requirements.

[0012] 2. The seeding device mentioned in this invention can shoot seeds at high speed, ensuring seed sowing efficiency.

[0013] 3. The seeding device mentioned in this invention integrates lightweight, convenience, and simplicity, making the application range of the device more possible. It can also adjust the seeding situation by controlling the air pressure and the rotation speed of the seeding disc to adapt to specific environments.

[0014] 4. The seeding device mentioned in this invention uses an air-blowing method to fill seeds and utilizes high-speed airflow to carry seeds for seeding, which does not have high requirements for the airtightness of the device. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is a partial exploded view of the present invention;

[0019] Figure 4 Side view of the present invention Figure 1 ;

[0020] Figure 5 Side view of the present invention Figure 2 .

[0021] In the diagram: 1. Seeder; 101. Front cover; 1011. Seed outlet; 102. Rear cover; 103. End cover opening; 104. Seed tray; 1041. Hole; 105. Seed cleaning brush; 1051. Restraint brush; 2. Seeder guide tube; 201. Seeder tube air connector; 202. Seeder guide tube; 203. Seeder tube; 3. Seed box; 4. Drive assembly; 401. Motor end cover; 402. Motor; 403. Drive blade; 404. Drive blade fixing cover; 5. Air inlet pipe connector; 7. Seed filling component; 701. Flow control valve; 702. Valve control linkage; 703. Seed filling area. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] A small-diameter seed air-blowing seed metering device 1 includes: a seed metering device 1, a seeding guide tube 2, an air inlet pipe connector 5, a seed filling component 7, a seed box 3, and a drive assembly 4. The seed box 3 is fixedly installed on the seed metering device 1; the seeding guide tube 2 is fixedly installed on the seed metering device 1; and the drive assembly 4 is installed inside the seed metering device 1.

[0024] The seed metering device 1 includes a front cover 101, a rear cover 102, an end cover opening 103, a seed metering disc 104, a seed cleaning brush 105, and a restraining brush 1051. The front cover 101 is fixedly connected to the rear cover 102. A seed metering opening 1011 is provided on the front cover 101. The seed metering disc 104 is fixedly disposed between the front cover 101 and the rear cover 102. A plurality of shaped holes 10411 are provided on the arc-shaped wall surface of the seed metering disc 104. The seed cleaning brush 105 and the restraining brush 1051 are fixedly connected to the rear cover 102. The seed cleaning brush 105 is used to clean excess seeds in the shaped holes 10411. The restraining brush 1051... The seed cleaning brush 105 and the constraint brush 1051 are used to constrain the movement of seeds in the seed metering tray 104. The included angle between them is 135°, which limits the range of the seed filling area 703. The seed filling component 7 includes a flow control valve 701, a valve control linkage 702, and a seed filling box 3. The flow control valve 701 is fixedly connected to the rear end cover 102, and the valve control linkage 702 is fixedly connected to the flow control valve 701. The valve control linkage 702 is rotatably connected to the rear end cover 102. The rear end cover 102 has an opening, and the valve control linkage 702 passes through the opening and can swing within the opening. The seed filling box 3 is fixedly connected to the rear end cover 102, and the flow control valve 701 is disposed inside the seed filling box 3.

[0025] In this embodiment, when multiple seeds need to be sown in one hole, seed metering trays 104 of different thicknesses can be installed so that the holes 10411 can accommodate multiple seeds to meet different sowing needs. For example, when used for sowing non-spherical small-diameter seeds such as sesame, the holes 1041 of the seed metering tray 104 can be adjusted to be elliptical or other shapes to accommodate seeds of different shapes.

[0026] The seed metering device has an end cap that can be opened and closed. When the orifice 10411 is blocked or when residue falls into the gap between the seed metering disc 104 and the end cap, the end cap opening 103 can be opened for cleaning.

[0027] Seeds flow from seed box 3 into the filling port (i.e., the inlet of filling area 703), and then into the seed metering device. They accumulate in filling area 703 and enter the seed metering port 1011 under the action of high-pressure airflow. The seed hole 10411 can hold different amounts of seeds depending on its thickness. When the thickness is 2mm, single-seed filling can be achieved. Under the action of high-pressure airflow, the seeds in the seed hole 1041 rotate with the seed metering disc 104. Seeds that do not completely enter the seed hole 1041 are brushed off by the seed cleaning brush 105. Seeds that completely enter the seed hole 1041 are carried to the seed metering port 1011. Under the action of high-pressure airflow inside the seed metering device cavity, they are blown from the seed metering disc 104 into the seed metering port 1011 of the end cap, and then enter the seeding tube 203 from the seed metering port 1011. The high-speed airflow in the seeding tube 203 accelerates the seeds into the soil.

[0028] Motor 402 is controlled by a microcontroller, which can adjust the speed of seed metering disc 104 according to the actual working conditions.

[0029] The seeding guide tube 2 is divided into three parts: the seeding tube air pipe connector 201, the seeding guide tube 202, and the seeding tube 203, which are installed to avoid blockages inside the tube that cannot be cleaned. The seeding guide tube 202 is designed with a bend to prevent the seeds from directly colliding with the tube wall when they are injected from the seed metering tray 104 into the seeding tube 203.

[0030] The front cover 101 of the seed metering device is provided with a seed dispensing port 1011 that communicates with the outside. There is a gap of 0.02-0.03mm between the seed dispensing disc 104 and the front cover 101 to prevent direct contact between the seed dispensing disc 104 and the front cover 101 and to ensure that the seeds do not fall out through the gap. At the same time, airflow can be discharged through the gap and the seed dispensing port 1011 of the front cover 101. The connecting rod is rotatably connected to the rear cover 102 via a damping knob. The flow rate of the seed filling area 703 is controlled by moving the connecting rod up and down using the damping knob.

[0031] The seeding conduit 2 includes a seeding tube duct connector 201, a seeding tube 202, and a seeding tube 203. The seeding tube duct connector is located at one end of the seeding tube 202, and the seeding tube 203 is fixedly installed at the other end of the seeding tube 202. The seeding tube 202 is r-shaped, and its third end is fixedly passed through the arc-shaped wall of the front end cover 101. The third end of the seeding tube 202 corresponds to the position of the seed outlet 1011. The seeding tube connector is connected to a high-pressure blower, which is used to blow out a high-speed airflow.

[0032] Furthermore, the seeding tube 203 can be connected to an airflow regulating device, such as an airflow sensor and an automatic regulating valve, to achieve more precise airflow control and ensure the stability and uniformity of the seeds during the seeding process.

[0033] The pressure of the seeding airflow can be adjusted according to different soil moisture conditions to ensure the seed penetration effect.

[0034] When used for seeding seeds of different small diameters, seeding tubes 203 of different diameters can be installed to ensure seeding effect.

[0035] The drive assembly 4 includes a drive motor 402, a drive blade 403, and a drive blade fixing cover 404. The drive motor 402 is fixed inside the motor 402 bracket, and the motor 402 bracket is fixed inside the center of the rear end cover 102. The motor 402 shaft of the drive motor 402 is fixedly connected to the central shaft of the drive blade 403. The drive blade 403 is covered by and fixed with the drive blade fixing cover 404. The drive blade fixing cover 404 is fixedly disposed at the center of the seed metering disc 104. The seed metering disc 104 rotates as the drive blade 403 rotates due to the fixing of the drive blade fixing cover 404 with the drive blade 403, the motor 402 shaft, and the seed metering disc 104.

[0036] In this embodiment, the drive blade 403 is fixed to the motor 402 shaft and the seed metering disc 104 by the drive blade fixing cover 404, so that the seed metering disc 104 rotates as the drive blade 403 rotates. The drive motor 402 drives the drive blade 403 and the drive blade fixing cover 404 to rotate, thereby driving the seed metering disc 104 to rotate.

[0037] The seed metering tray 104 can be selected with different thicknesses according to agronomic requirements.

[0038] The seeding tray 104 has a seed inlet on its rear end cover 102.

[0039] The seed metering disc 104 has a 0.3mm gap with the end cap.

[0040] An air inlet pipe connector 5 is installed on the rear end cover 102, and the air inlet pipe connector 5 is connected to a high-pressure blower. The air inlet pipe connector 5 is connected to an air compressor, and the high-pressure airflow is input through the air compressor to increase the movement speed of the seeds in the seeding tube 203.

[0041] In this invention, a seed metering tray 104 of appropriate thickness is selected according to agronomic requirements and sowing needs. If multiple seeds need to be sown in one hole, a seed metering tray 104 is assembled that can accommodate the corresponding number of seeds at the seed metering opening 1011. If it is used for sowing non-spherical small-diameter seeds such as radishes, the orifice 1041 of the seed metering tray 104 is adjusted to an elliptical shape or other suitable shape. A seeding tube 203 of appropriate diameter is selected according to the diameter of the seeds to be sown. At the same time, the pressure of the seeding airflow is adjusted by an airflow regulating device (such as an airflow sensor and an automatic regulating valve) connected to the seeding tube 203 according to different soil moisture conditions.

[0042] Taking stem mustard seeds as an example, calculations are performed based on agricultural machinery manuals. The diameter of existing seed metering discs 104 is generally 140-260 mm. When designing the size of the seed metering disc 104, considering that a larger diameter disc is beneficial for seed filling performance, but also increases the power required by the high-pressure blower, this paper designs the diameter of the seed metering disc 104 to be 200 mm and the thickness to be 2 mm. Furthermore, the number of perforations 1041 on the seed metering disc 104 is also an important factor affecting the seed metering performance. Calculations are performed based on formulas 1 and 2 regarding the number of perforations 1041 on the seed metering disc 104.

[0043]

[0044] In the formula, n is the rotational speed of the seed metering disc, in r / s.

[0045] V-shaped hole linear velocity, m / s

[0046] The diameter of the D-type holes 1041 arranged in a ring on the seed metering disc 104 is (mm).

[0047] According to the requirements of the agricultural machinery manual for pneumatic seeders, the operating speed is generally 6 km / h, the slip rate is generally 2%, and the plant spacing of stem mustard is 30-45 mm according to agronomic requirements. This article takes 30 mm as the standard plant spacing and the speed of the seed metering device can be obtained. The number of holes 10411 can be calculated according to formula 2.

[0048]

[0049] In the formula, N represents the number of holes 10411, and P represents the tractor's operating speed in km / h.

[0050] A—Sowing spacing, in mm

[0051] n—Search disc rotation speed, in r / s

[0052] δ r —Slippage rate of the traveling wheels.

[0053] As airflow velocity increases, seed particles collide more intensely within the tube. The gas-solid two-phase flow theory assumes that particles introduced into the airflow are subjected to various forces, including gravity G, i.e., the drag force Fr and buoyancy Ff of the airflow. According to Newton's second law of motion, the following can be determined:

[0054]

[0055] It is the speed of the seed in the air, measured in m / s;

[0056] t is the instantaneous velocity of the seed movement, measured in seconds (s).

[0057] m is the weight of the seed, in kg;

[0058] F is the net force acting on the seed, measured in N.

[0059] The kinematic model of the seed transport process is shown in the following formula:

[0060]

[0061] v x0 It is the initial velocity in the horizontal direction, and the unit is m / s;

[0062] v y0 It is the initial velocity in the vertical direction, and the unit is m / s;

[0063] v z0 It is the initial velocity perpendicular to the seed metering disc 104, in m / s;

[0064] L x It is the horizontal displacement, measured in meters (m).

[0065] L y It is the vertical displacement, measured in meters (m).

[0066] L z It is the displacement in the direction perpendicular to the suction cup, and the unit is meters (m).

[0067] Vy is the velocity perpendicular to the 104 direction of the seed metering disc, in m / s;

[0068] Vx is the velocity horizontally in the direction of the seed metering disc 104, and its unit is m / s;

[0069] Vz is the velocity perpendicular to the side of the seed metering disc 104, in m / s;

[0070] t is the fall time, measured in seconds.

[0071] The initial velocity of the seed is determined by the positive pressure it experiences in the orifice 1041 of the seed metering disc 104. The positive pressure p when the seed enters the seeding tube 203 from the seed metering disc 104 has a brief duration t on the seed. Δ The influence of this relationship can be expressed by the following formula:

[0072] pst Δ =mv z0 (5)

[0073] Among them, t Δ 'm' represents a short period of time, 'm' represents the seed mass, and 'p' represents positive pressure.

[0074] Fluid resistance is caused by the relative motion between the particles and the fluid. When the air velocity significantly exceeds the seed velocity, it acts as the propulsive force propelling the seed. This can be expressed as follows:

[0075]

[0076] F D It is the drag force of seeds in the airflow, measured in N;

[0077] C D It is the drag coefficient;

[0078] ρ is the fluid density, with units of kg / m³. 3 ;

[0079] A is the maximum area of ​​the particle's cross-section, measured in meters. 2 ;

[0080] vΔ is the relative velocity between the seed and the fluid, measured in m / s.

[0081] The interaction between the seed and the tube wall should not be considered. The seed is subjected to the combined thrust of the high-speed airflow and gravity, resulting in continuous acceleration in the vertical direction. According to Newton's second law, the acceleration equation of the seed can be derived as follows:

[0082]

[0083] F D It is the drag force of seeds in the airflow, measured in N;

[0084] G is the seed gravitational force, measured in N;

[0085] r m This is the seed radius, in meters (m).

[0086] v m It is the velocity in the airflow, measured in m / s;

[0087] ρ m It is the density of air, measured in kg / m³. 3 .

[0088] The acceleration process of stem mustard seeds in seeding tube 203 can be determined by formulas (6) and (7):

[0089]

[0090] Where: C D It is the drag coefficient;

[0091] v m It is the velocity in the airflow, measured in m / s;

[0092] G is the seed gravitational force, measured in N;

[0093] ρ m It is the density of air, measured in kg / m³. 3；

[0094] ρ is the fluid density, with units of kg / m³. 3 ;

[0095] vΔ is the relative velocity between the seed and the fluid, measured in m / s.

[0096] In the seeding tube 203, airflow experiences pressure loss due to tube wall friction and seed resistance. This pressure loss can be calculated using the Darcy-Weisbach formula:

[0097]

[0098] ΔP is the pressure loss, measured in Pa.

[0099] f is the coefficient of friction of the inner wall of the pipe;

[0100] L is the length of the 203 seeding tube, in meters (m).

[0101] D is the diameter of the 203 seeding tube, in meters (m).

[0102] ρ m It is the density of air, measured in kg / m³. 3 ;

[0103] v is the airflow velocity, measured in m / s.

[0104] When a seed reaches equilibrium in an airflow, its terminal velocity can be calculated using the following formula:

[0105]

[0106] v t It is the terminal velocity of the seed, measured in m / s;

[0107] m is the seed mass, in kg;

[0108] g is the acceleration due to gravity, and its unit is m / s². 2 ;

[0109] ρ m It is the density of air, measured in kg / m³. 3 ;

[0110] A is the maximum area of ​​the particle's cross-section, measured in meters. 2 ;

[0111] C D It is the drag coefficient.

[0112] The method of using this invention is as follows:

[0113] In use, the drive motor 402 is started. The motor 402, controlled by a microcontroller, can adjust the speed of the seed metering disc 104 according to the actual working conditions. The motor shaft of the drive motor 402 drives the drive blade 403 to rotate. The drive blade 403 drives the seed metering disc 104 to rotate through the drive blade fixing cover 404. Seeds flow from the seed box 3 into the filling port and accumulate in the filling area 703 inside the seed meterer. At this time, the damping knob can be used to move the connecting rod up and down to adjust the flow control valve 701 to control the seed flow rate in the filling area 703. Under the action of high-pressure airflow, the seeds enter the seed metering port 1011 on the seed metering disc 104. During the rotation of the seed metering disc 104, seeds that have not completely entered the orifice 1041 are brushed off by the cleaning brush 105. The angle between the cleaning brush 105 and the constraint brush 1051 is 135°, which limits the range of the filling area 703. The constraint brush 1051 constrains the seeds in the seed metering disc 104. The seeds, having fully entered the orifice 1041, are carried to the seed outlet 1011. Under the influence of the high-pressure airflow inside the seed metering device cavity, they are blown from the seed metering disc 104 into the seed outlet 1011 of the end cap, and then into the seeding tube 203. A high-pressure blower connected to the seeding tube air connector 201 blows out a high-speed airflow, accelerating the seeds within the seeding tube 203. The seeds are then injected into the soil through the seeding guide tube 202 (designed with a curve to avoid direct collision between the seeds and the tube wall). During use... If the seed metering port 1011 is blocked or residue falls into the gap between the seed metering tray 104 and the end cover, the end cover opening 103 at the top of the front cover 101 of the seed meterer can be opened for cleaning. There is a gap of 0.02-0.03mm between the seed metering tray 104 and the front cover 101, which avoids direct contact and prevents seeds from falling. Airflow can also be discharged through the gap via the seed metering port 1011 of the front cover 101. There is a gap of 0.3mm between the seed metering tray 104 and the rear cover 102.

[0114] The above-disclosed embodiments are merely specific examples of the present invention. However, the present invention is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A small-diameter seed air-blowing seed metering device (1), characterized in that it comprises: The seeding device includes a seeding tube (1), a seeding guide tube (2), an air inlet pipe connector (5), a seed filling component (7), a seed box (3), and a drive assembly (4). The seed box (3) is fixedly installed on the seeding device (1). The seeding guide tube (2) is fixedly installed on the seeding device (1), and the drive assembly (4) is installed inside the seeding device (1). The seed metering device (1) includes a front cover (101), a rear cover (102), an end cover opening (103), a seed metering disc (104), a seed cleaning brush (105), and a constraint brush (1051); the front cover (101) is fixedly connected to the rear cover (102); the front cover (101) is provided with a seed metering opening (1011), the seed metering disc (104) is fixedly disposed between the front cover (101) and the rear cover (102), and the seed metering disc (104) is provided with a shaped hole (1041) 1. 1041) 1 is a number of holes evenly arranged on the arc-shaped wall of the seed metering tray (104). The seed cleaning brush (105) and the constraint brush (1051) are fixedly connected to the rear end cover (102). The seed cleaning brush (105) is used to clean the excess seeds in the hole (1041) 1. The constraint brush (1051) is used to constrain the movement of seeds in the seed metering tray (104). The included angle between the seed cleaning brush (105) and the constraint brush (1051) is 135°, which limits the range of the filling area (703). An air inlet pipe connector (5) is installed on the rear end cover (102), and the air inlet pipe connector (5) is connected to a high-pressure blower; Under the influence of high-pressure airflow, the seeds rotate in the seed metering disc within the seed-forming holes. Seeds that do not fully enter the seed-forming holes are brushed off by the seed cleaning brush, while seeds that have fully entered the seed-forming holes are carried to the seed-discharging port. Under the influence of high-pressure airflow inside the seed metering device cavity, the seeds are blown from the seed metering disc into the seed-discharging port of the end cap.

2. The small-diameter seed air-blowing seed metering device (1) according to claim 1, characterized in that, The seed filling component (7) includes a flow control valve (701), a valve control linkage (702), and a seed filling box; the flow control valve (701) is fixedly connected to the rear end cover (102), and the valve control linkage (702) is fixedly connected to the flow control valve (701); the valve control linkage (702) is rotatably connected to the rear end cover (102), the rear end cover (102) is provided with an opening, the valve control linkage (702) passes through the opening and can swing within the opening, the seed filling box is fixedly connected to the rear end cover (102), and the flow control valve (701) is disposed inside the seed filling box.

3. The small-diameter seed air-blowing seed metering device according to claim 1, characterized in that: The seeding conduit (2) includes a seeding tube duct connector (201), a seeding tube (202), and a seeding tube (203). The seeding tube duct connector is located at one end of the seeding tube (202), and the seeding tube (203) is fixedly installed at the other end of the seeding tube (202). The seeding tube (202) is r-shaped and its third end is fixedly inserted through the arc-shaped wall of the front end cover (101). The third end of the seeding tube (202) corresponds to the position of the seed outlet (1011). The seeding tube duct connector is connected to a high-pressure blower, which is used to blow out a high-speed airflow.

4. The small-diameter seed air-blowing seed metering device according to claim 1, characterized in that: The drive assembly (4) includes a drive motor (402), a drive blade (403), and a drive blade fixing cover (404). The drive motor (402) is fixed inside a motor bracket, and the motor bracket is fixed inside the center of the rear end cover (102). The motor shaft of the drive motor (402) is fixedly connected to the central shaft of the drive blade (403). The drive blade (403) is covered and fixed with the drive blade fixing cover (404). The drive blade fixing cover (404) is fixedly disposed at the center of the seed metering disc (104). Through the fixing of the drive blade fixing cover (404) with the drive blade (403), the motor shaft, and the seed metering disc (104), the seed metering disc (104) rotates as the drive blade (403) rotates.

5. The small-diameter seed air-blowing seed metering device according to claim 1, characterized in that: The rear cover (102) has an inlet for seeding.

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