A high-speed seeder and its energy dissipation and airflow-assisted seed guiding device and method

Abstract

A high-speed seeder and its energy-dissipating airflow-assisted seed guiding device and method. The energy-dissipating airflow-assisted seed guiding device is installed on the high-speed seeder and includes: an energy-dissipating airflow-assisted seed guiding device, which is a funnel-shaped structure. The head of the energy-dissipating airflow-assisted seed guiding device is connected to the pneumatic seed metering device of the high-speed seeder, and an energy-dissipating flexible receiving layer is evenly applied on the inner wall of the head of the energy-dissipating airflow-assisted seed guiding device; and an auxiliary seed guiding device, which includes a main body and an air intake chamber, a seed feeding chamber, a mixing chamber, and a conveying chamber arranged in the main body. One end of the air intake chamber is connected to the blower of the high-speed seeder through an air intake port, and the other end of the air intake chamber is connected to the mixing chamber; the seed feeding chamber is connected to the bucket handle of the energy-dissipating airflow-assisted seed guiding device through a seed feeding port, and the other end of the seed feeding chamber is connected to the mixing chamber; the bottom of the mixing chamber is connected to the conveying chamber; and the bottom of the conveying chamber is connected to a conveying pipe. The present invention also discloses an energy-dissipating airflow-assisted seed guiding method.

Description

Technical Field

[0001] The present invention relates to high-speed precision seeding agricultural equipment, in particular to a high-speed seeder and its energy dissipation and airflow-assisted seed guiding device, which can realize seed energy dissipation, flexible control of motion trajectory and precise zero-speed seeding operation and method. Background Art

[0002] High-speed precision seeding technology can effectively promote the development of modern agriculture towards high precision and high efficiency. Poor uniformity in seed spacing is one of the difficulties in implementing high-speed precision seeding technology. The seed transport system of the high-speed seeder in the prior art is usually composed of a pneumatic seed meter and a seed guide tube. Since the seed guide tube is arranged at a certain interval below the seed meter, after the seeds are discharged from the seed discharge port of the seed meter, they are laterally offset under the action of inertia, causing the seeds to collide with the wall of the seed guide tube. The movement trajectories of the seeds in the seed guide tube vary greatly, and the seed exit trajectories are different, which leads to poor uniformity in seed spacing. The greater the operating speed, the lower the qualified rate of seed spacing, which seriously affects the sowing quality under high-speed operating conditions. The finger-belt seed projection device and belt-type seed guide device in the prior art have the defects of complex structure and operating speed less than 13km / h. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high-speed seeder and an energy dissipation and airflow-assisted seed guiding device and method thereof in response to the above-mentioned defects of the prior art.

[0004] In order to achieve the above-mentioned object, the present invention provides an energy dissipation and airflow-assisted seed guiding device installed on a high-speed seeder, which includes:

[0005] The energy dissipation receiving mechanism is a funnel-shaped structure, the head of the energy dissipation receiving mechanism is connected to the pneumatic seed metering device of the high-speed seeder, and an energy dissipation flexible receiving layer is evenly coated on the inner wall of the head of the energy dissipation receiving mechanism; and

[0006] The auxiliary seed guiding mechanism includes a main body and an air intake chamber, a seed intake chamber, a mixing chamber and a conveying chamber arranged in the main body. One end of the air intake chamber is connected to the blower of the high-speed seeder through an air inlet, and the other end of the air intake chamber is connected to the mixing chamber; the seed intake chamber is connected to the bucket handle of the energy dissipation receiving mechanism through a seed intake, and the other end of the seed intake chamber is connected to the mixing chamber; the bottom of the mixing chamber is connected to the conveying chamber; and the bottom of the conveying chamber is connected to the conveying pipe.

[0007] The above-mentioned energy dissipation and airflow assisted seed guiding device, wherein the energy dissipation flexible receiving layer is a fluid layer made of sodium alginate aqueous solution, and the fluid layer has a certain proportion of viscosity and elasticity. After the seed collides, under the action of liquid drag and viscous shear stress, the speed is rapidly reduced to the minimum value, and it is separated from the energy dissipation flexible receiving layer under the action of elastic force.

[0008] The above-mentioned energy dissipation and airflow assisted seed guiding device, wherein the conveying pipe includes a positive pressure stable acceleration section and a constant speed seeding section connected in sequence, the constant speed seeding section includes a curved section and an inclined straight line section, the two ends of the curved section are respectively connected to the positive pressure stable acceleration section and the inclined straight line section, the axis of the inclined straight line section has an angle with the horizontal plane, and the end of the inclined straight line section is the seed outlet.

[0009] The above-mentioned energy dissipation and airflow-assisted seed guiding device, wherein the diameter of the air inlet chamber is larger than the diameter of the mixing chamber, and a contraction angle is provided between the air inlet chamber and the mixing chamber.

[0010] The above-mentioned energy dissipation and airflow-assisted seed guiding device, wherein the seed feeding chamber is connected to the middle part of the mixing chamber, and the diameter of the seed feeding chamber is the same as the diameter of the mixing chamber.

[0011] The above-mentioned energy dissipation and airflow-assisted seed guiding device, wherein the diameter of the mixing chamber is smaller than the diameter of the conveying chamber, and a diffusion angle is set between the mixing chamber and the conveying chamber.

[0012] In order to better achieve the above-mentioned purpose, the present invention also provides an energy dissipation and airflow-assisted seed guiding method for precise zero-speed seeding of a high-speed seeder, which includes the following steps:

[0013] S100, providing an air flow at a set speed to the air inlet chamber by a blower, wherein the air flow first passes through a contraction section between the air inlet chamber and the mixing chamber, so that a negative pressure of a set pressure is generated in the mixing chamber and the seed inlet chamber;

[0014] S200, the airflow passes through the diffusion section of the mixing chamber and the conveying chamber, so that the conveying chamber generates a positive pressure of the set pressure;

[0015] S300, using a pneumatic seed metering device to discharge a fixed amount of seeds, after the seeds hit the energy dissipation flexible receiving layer at a set speed, the kinetic energy of the seeds is sharply reduced to zero; then, under the action of gravity, the seeds enter the seed feeding chamber in an orderly manner in a vertical direction;

[0016] S400, in the negative pressure adsorption acceleration section, the airflow adsorbs and carries the seeds to accelerate the movement, and the seeds move to the lower part of the mixing chamber;

[0017] S500, in the pressure transition deceleration section, the airflow pressure transitions from a negative value to a positive value, and the seeds decelerate and move to the upper part of the conveying chamber; and

[0018] S600, in the positive pressure stable acceleration section, the positive pressure airflow blows the seeds quickly through the conveying chamber into the conveying pipe, and moves to the constant speed seeding section of the conveying pipe, completing zero speed seeding.

[0019] The above-mentioned energy dissipation and airflow assisted seed guiding method, wherein, after the seeds reach the constant speed seeding section, the speed direction changes along the curved section, and has a horizontal seed component velocity when reaching the seed outlet along the inclined straight section. By increasing the air flow velocity in the air inlet chamber, the corresponding acceleration is provided to the seeds, so that the seed component velocity is opposite to the forward speed direction of the high-speed seeder and equal in magnitude, and the horizontal seed exit velocity of the seeds is zero.

[0020] In order to better achieve the above-mentioned purpose, the present invention also provides a high-speed seeder, which includes the above-mentioned energy dissipation and airflow auxiliary seed guiding device.

[0021] The high-speed seeder has an operating speed of 8 to 16 km / h.

[0022] The technical effects of the present invention are:

[0023] The energy dissipation and airflow-assisted seed guiding device of the present invention is suitable for all pneumatic seeders, can realize seed energy dissipation, flexible control of motion trajectory and precise zero-speed seeding operation, can assist high-speed seeders to achieve precise zero-speed seeding, and significantly improve the uniformity of grain spacing.

[0024] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an energy dissipation and airflow-assisted seed guiding device according to an embodiment of the present invention;

[0026] Figure 2 A schematic diagram of an energy dissipation receiving mechanism according to an embodiment of the present invention;

[0027] Figure 3 for Figure 2 AA cross-sectional view;

[0028] Figure 4 This is a schematic diagram of a positive pressure airflow assisted seed guiding mechanism according to an embodiment of the present invention;

[0029] Figure 5 for Figure 4 BB cross-sectional view;

[0030] Figure 6 This is a diagram showing the working principle of a positive pressure airflow assisted seed guiding mechanism according to an embodiment of the present invention.

[0031] Among them, the reference numerals

[0032] 1Energy dissipation undertaking organization

[0033] 11 Head

[0034] 12 Energy dissipation flexible receiving layer

[0035] 13 handle

[0036] 2. Auxiliary seed guidance mechanism

[0037] 21Ontology

[0038] 22 air intake chamber

[0039] 23 air intakes

[0040] 24 seed rooms

[0041] 25 seed inlet

[0042] 26 mixing chambers

[0043] 27 Transport Room

[0044] 28 delivery pipe

[0045] 29 seed outlet

[0046] ⅠNegative pressure adsorption acceleration stage

[0047] Ⅱ Pressure transition deceleration section

[0048] Ⅲ Positive pressure stable acceleration stage

[0049] IV Constant speed seeding stage DETAILED DESCRIPTION

[0050] The structural principle and working principle of the present invention are described in detail below with reference to the accompanying drawings:

[0051] See also Figure 1 , Figure 1 This is a structural schematic diagram of an energy dissipation and airflow-assisted seed guiding device according to one embodiment of the present invention. The energy dissipation and airflow auxiliary seed guiding device of the present invention is installed on a high-speed seeder and includes: an energy dissipation and airflow auxiliary seed guiding device 1, which is a funnel-shaped structure. The head 11 of the energy dissipation and airflow auxiliary seed guiding device 1 is connected to the pneumatic seed metering device of the high-speed seeder, and an energy dissipation and airflow auxiliary seed guiding device 1 is evenly covered with an energy dissipation and airflow auxiliary seed guiding device 1; and an auxiliary seed guiding mechanism 2, which includes a main body 21 and an air intake chamber 22, a seed feeding chamber 24, a mixing chamber 26 and a conveying chamber 27 arranged in the main body 21, one end of the air intake chamber 22 is connected to the blower of the high-speed seeder through the air inlet 23, and the other end of the air intake chamber 22 is connected to the mixing chamber 26; the seed feeding chamber 24 is connected to the bucket handle 13 of the energy dissipation and airflow auxiliary mechanism 1 through the seed feeding port 25, and the other end of the seed feeding chamber 24 is connected to the mixing chamber 26; the bottom of the mixing chamber 26 is connected to the conveying chamber 27; the bottom of the conveying chamber 27 is connected to the conveying pipe 28.

[0052] See also Figure 2 and Figure 3 , Figure 2This is a schematic diagram of an energy dissipation receiving mechanism 1 according to an embodiment of the present invention. Figure 3 for Figure 2 AA cross-sectional view. The energy dissipation flexible receiving layer 12 of this embodiment is a shear-thinning fluid layer made of a sodium alginate aqueous solution. The shear-thinning fluid layer is evenly applied to the inner wall of the funnel with a certain thickness and has a certain ratio of viscosity and elasticity. After the seed impacts the funnel, the velocity is rapidly reduced to a minimum value under the action of the liquid drag force and viscous shear stress, and the seed is separated from the energy dissipation flexible receiving layer 12 under the action of the elastic force.

[0053] See also Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of a positive pressure airflow assisted seeding structure according to an embodiment of the present invention. Figure 5 for Figure 4 BB cross-sectional view. The conveying pipe 28 of this embodiment includes a positive pressure stable acceleration section III and a constant speed seeding section IV connected in sequence, and the constant speed seeding section IV includes a curved section and an inclined straight section, and the two ends of the curved section are respectively connected to the positive pressure stable acceleration section III and the inclined straight section, and the axis of the inclined straight section has an angle with the horizontal plane, and the end of the inclined straight section is the seed outlet 29. The diameter of the air inlet chamber 22 is larger than the diameter of the mixing chamber 26, and a contraction angle is set between the air inlet chamber 22 and the mixing chamber 26. The seed inlet chamber 24 is connected to the middle part of the mixing chamber 26, and the diameter of the seed inlet chamber 24 is the same as the diameter of the mixing chamber 26. The diameter of the mixing chamber 26 is smaller than the diameter of the conveying chamber 27, and a diffusion angle is set between the mixing chamber 26 and the conveying chamber 27.

[0054] See also Figure 6 , Figure 6 This is a working principle diagram of a positive pressure airflow assisted seed guiding mechanism 2 according to an embodiment of the present invention. The energy dissipation and airflow assisted seed guiding method of the present invention is used for precise zero-speed seeding of a high-speed seeder, and includes the following steps:

[0055] Step S100: A blower is used to provide an airflow at a set speed to the air inlet chamber 22. The airflow first passes through the contraction section between the air inlet chamber 22 and the mixing chamber 26, so that a negative pressure of a set pressure is generated in the mixing chamber 26 and the seed inlet chamber 24.

[0056] Step S200: The airflow passes through the diffusion section of the mixing chamber 26 and the conveying chamber 27, so that the conveying chamber 27 generates a positive pressure of the set pressure;

[0057] Step S300: A pneumatic seed metering device discharges a fixed amount of seeds. After the seeds hit the energy-dissipating flexible receiving layer 12 at a set speed, the kinetic energy of the seeds decreases sharply to zero. Subsequently, the seeds enter the seed feeding chamber 24 in an orderly manner along the vertical direction under the action of gravity.

[0058] Step S400: In the negative pressure adsorption acceleration section I, the airflow adsorbs and carries the seeds to accelerate the movement, and the seeds move to the lower part of the mixing chamber 26;

[0059] Step S500: In the pressure transition and deceleration section II, the airflow pressure transitions from a negative value to a positive value, and the seeds decelerate and move to the upper part of the conveying chamber 27; and

[0060] Step S600: In the positive pressure stable acceleration section III, the positive pressure airflow blows the seeds quickly through the conveying chamber 27 into the conveying pipe 28, and moves to the constant speed seeding section IV of the conveying pipe 28, completing the zero speed seeding.

[0061] Among them, after the seeds reach the constant speed seeding section IV, the speed direction changes along the curved section, and when they reach the seed outlet 29 along the inclined straight section, they have a horizontal seed component velocity. By increasing the air flow velocity of the air inlet chamber 22, the corresponding acceleration is provided to the seeds, so that the seed component velocity is opposite to the forward speed direction of the high-speed seeder and equal in magnitude, and the horizontal seed ejection velocity is zero.

[0062] The present invention also provides a high-speed seeder equipped with the energy dissipation and airflow-assisted seed guiding device, with an operating speed of 8 to 16 km / h. The composition, structure, relative positional relationships, connection relationships, and functions of the other parts of the high-speed seeder can all be based on relatively mature existing technologies and will not be described in detail here.

[0063] The high-speed seeder of the present invention can achieve precise zero-speed seeding. According to the operating speed, the blower provides the air inlet chamber 22 with an air flow of a certain speed. The air flow first passes through the contraction section between the air inlet chamber 22 and the mixing chamber 26, so that the mixing chamber 26 and the seed inlet chamber 24 generate a certain negative pressure. Then the air flow passes through the diffusion section between the mixing chamber 26 and the conveying chamber 27, so that the conveying chamber 27 generates a certain positive pressure. A pneumatic seeding device is used to discharge a certain amount of seeds. After the seeds hit the shear-thinning fluid layer at a certain speed, the kinetic energy of the seeds decreases sharply to zero. Then, under the action of gravity, the seeds enter the seed inlet chamber 24 in an orderly manner in the vertical direction. In the negative pressure adsorption acceleration section, the seeds are discharged in a certain amount of time. The airflow in section Ⅰ absorbs and carries the seeds to accelerate, and the seeds move to the lower part of the mixing chamber 26. The airflow pressure in section Ⅱ transitions from negative to positive, and the seeds decelerate and move to the upper part of the conveying chamber 27. In section Ⅲ, the positive pressure airflow blows the seeds quickly through the conveying chamber 27 and into the conveying pipe 28. After the seeds move to the curved section of the conveying pipe 28, the direction of the speed changes, and when they reach the seed outlet 29, they have a horizontal component speed, which is opposite to the forward speed of the seeder and is approximately the same in size. The seed speed meets the predetermined value requirement, and zero-speed sowing is completed in section Ⅳ, which is a constant-speed sowing section.

[0064] The inner wall of the energy dissipation receiving mechanism 1 of the present invention is coated with an energy dissipation flexible receiving layer 12 made of a sodium alginate aqueous solution. The fluid in this energy dissipation flexible receiving layer 12 has a certain ratio of viscosity and elasticity. After the seed impacts the flexible receiving body, its velocity is rapidly reduced to a minimum under the action of the liquid drag force and viscous shear stress. The seed then separates from the flexible receiving body under the action of elastic force and then enters the seed inlet chamber 24 in an orderly manner under the action of gravity, thereby absorbing the seed's kinetic energy and eliminating the kinetic energy source caused by the seed colliding with the inner wall of the energy dissipation receiving mechanism 1. The positive pressure airflow-assisted seed guiding mechanism 2 uses positive pressure airflow to blow the seed. The seed movement process in the airflow guiding mechanism can be divided into four stages: negative pressure adsorption acceleration stage I, pressure transition deceleration stage II, positive pressure stable acceleration stage III, and constant speed seeding stage IV. This flexibly constrains the seed's motion trajectory. For the seeder operating speed range of 8 to 16 km / h, by increasing the inlet airflow velocity to provide the seed with corresponding acceleration, the horizontal exit velocity is reduced to zero, which can significantly improve the uniformity of seed spacing.

[0065] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An energy dissipation and airflow-assisted seed guiding device, installed on a high-speed seeder, characterized in that: include: The energy dissipation receiving mechanism is a funnel-shaped structure, the head of the energy dissipation receiving mechanism is connected to the pneumatic seed metering device of the high-speed seeder, and an energy dissipation flexible receiving layer is evenly coated on the inner wall of the head of the energy dissipation receiving mechanism; and The auxiliary seed guiding mechanism includes a main body and an air intake chamber, a seed feeding chamber, a mixing chamber and a conveying chamber arranged in the main body, one end of the air intake chamber is connected to the blower of the high-speed seeder through an air inlet, and the other end of the air intake chamber is connected to the mixing chamber; the seed feeding chamber is connected to the bucket handle of the energy dissipation receiving mechanism through a seed feeding port, and the other end of the seed feeding chamber is connected to the mixing chamber; the bottom of the mixing chamber is connected to the conveying chamber; and the bottom of the conveying chamber is connected to the conveying pipe; The energy dissipation flexible receiving layer is a fluid layer made of a sodium alginate aqueous solution. The fluid layer has a certain ratio of viscosity and elasticity. After the seed hits the fluid, the velocity is rapidly reduced to a minimum under the action of the liquid drag force and viscous shear stress, and the seed is separated from the energy dissipation flexible receiving layer under the action of the elastic force. The conveying pipe includes a positive pressure stable acceleration section and a constant speed seeding section connected in sequence, the constant speed seeding section includes a curved section and an inclined straight section, the two ends of the curved section are respectively connected to the positive pressure stable acceleration section and the inclined straight section, the axis of the inclined straight section forms an angle with the horizontal plane, and the end of the inclined straight section is a seed outlet; After the seeds reach the constant speed seeding section, the speed direction changes along with the curved section, and when they reach the seed outlet along the inclined straight section, they have a horizontal seed component velocity. By increasing the air flow velocity in the air inlet chamber, corresponding acceleration is provided to the seeds, so that the seed component velocity is opposite to the forward speed of the high-speed seeder and equal in magnitude, and the horizontal seed exit velocity is zero.

2. The energy dissipation and airflow-assisted seed guiding device according to claim 1, characterized in that: The diameter of the air inlet chamber is greater than the diameter of the mixing chamber, and a contraction angle is provided between the air inlet chamber and the mixing chamber.

3. The energy dissipation and airflow-assisted seed guiding device according to claim 1, characterized in that: The seed feeding chamber is connected to the middle of the mixing chamber, and the diameter of the seed feeding chamber is the same as that of the mixing chamber.

4. The energy dissipation and airflow-assisted seed guiding device according to claim 1, characterized in that: The diameter of the mixing chamber is smaller than the diameter of the conveying chamber, and a diffusion angle is set between the mixing chamber and the conveying chamber.

5. An energy dissipation and airflow-assisted seed guiding method for precise zero-speed seeding of high-speed seeders, characterized in that: The energy dissipation and airflow-assisted seed guiding device according to any one of claims 1 to 4 is used to perform precise zero-speed seeding, comprising the following steps: S100, providing an air flow at a set speed to the air inlet chamber by a blower, wherein the air flow first passes through a contraction section between the air inlet chamber and the mixing chamber, so that a negative pressure of a set pressure is generated in the mixing chamber and the seed inlet chamber; S200, the airflow passes through the diffusion section of the mixing chamber and the conveying chamber, so that the conveying chamber generates a positive pressure of the set pressure; S300, using a pneumatic seed metering device to discharge a fixed amount of seeds, after the seeds hit the energy dissipation flexible receiving layer at a set speed, the kinetic energy of the seeds is sharply reduced to zero; then, under the action of gravity, the seeds enter the seed feeding chamber in an orderly manner in a vertical direction; S400, in the negative pressure adsorption acceleration section, the airflow adsorbs and carries the seeds to accelerate the movement, and the seeds move to the lower part of the mixing chamber; S500, in the pressure transition deceleration section, the airflow pressure transitions from a negative value to a positive value, and the seeds decelerate and move to the upper part of the conveying chamber; and S600, in the positive pressure stable acceleration section, the positive pressure airflow blows the seeds quickly through the conveying chamber into the conveying pipe, and moves to the constant speed seeding section of the conveying pipe, completing zero speed seeding; Among them, after the seeds reach the constant speed seeding section, the speed direction changes along the curved section, and when they reach the seed outlet along the inclined straight section, they have a horizontal seed component velocity. By increasing the air flow velocity in the air inlet chamber, corresponding acceleration is provided to the seeds, so that the seed component velocity is opposite to the forward speed of the high-speed seeder and equal in magnitude, and the horizontal seed exit velocity is zero.

6. A high-speed seed drill, characterized in that: The invention comprises the energy dissipation and airflow-assisted seed guiding device as described in any one of claims 1 to 4.

7. The high-speed seed drill according to claim 6, characterized in that: The operating speed of the seed drill is 8 to 16 km / h.

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