Air-blowing type small-particle-size seed metering device and seed metering method

Abstract

The invention relates to an air-blowing type small-particle-size seed sowing device and a seed sowing method, and relates to the technical field of agricultural planting. The blowing type small-particle-size seed sowing device comprises a seed feeding device, a seed conveying device, a seed sowing device, a transmission device, a shell and a controller. According to the air-blowing type high-speed seed metering design scheme, small-particle-size seeds can be precisely discharged at a high speed, and the air-blowing type high-speed seed metering device is complete in function, easy and convenient to operate, economical, applicable and low in cost. In the seed metering process, the seed metering performance is good, the efficiency is high, accurate, rapid and effective real-time uniform high-speed seed metering can be realized, favorable conditions are provided for realizing high-quality seed metering, the cost is reduced, the operation time is shortened, and good economic benefits and social benefits are achieved.

Description

Technical Field

[0001] This application relates to the technical field of agricultural planting, and particularly relates to a seed metering device and a seed metering method for small-sized seeds by air blowing. Background Art

[0002] In the process of agricultural planting, a seeder can effectively improve the operation efficiency and seeding uniformity, and enhance the emergence quality of crops and planting income.

[0003] As the core working component of a seeder, the seed metering device changes its rotational speed in real time according to the change of the seeding operation speed. High-speed seeding requires the rotational speed of the seed metering device to change with the vehicle speed, and at the same time, it requires high precision and stable transmission. Its performance directly determines the seeding quality and crop yield.

[0004] Traditional air suction seed metering devices generally adopt mechanical transmission methods such as chains or drive shafts. When the seeding operation speed is relatively fast, due to the dynamic response lag and vibration of the transmission system, seed adsorption failure may occur in the edge area of the suction disc, resulting in missed seeding. At the same time, seed ejection may occur inside the suction cavity, and the seeding uniformity is poor, which affects the planting yield. Summary of the Invention

[0005] To solve or partially solve the problems existing in the related technologies, this application provides a seed metering device and a seed metering method for small-sized seeds by air blowing, which can achieve high-speed and precise discharge of small-sized seeds, with high seeding efficiency and good seeding performance.

[0006] In the first aspect of this application, a seed metering device for small-sized seeds by air blowing is provided. The seed metering device includes: a seed feeding device, a seed transporting device, a seed metering device, a transmission device, a housing, and a controller. The seed transporting device, the seed metering device, and the transmission device are installed in the housing;

[0007] The seed feeding device includes: a first blower, a wind distribution box, and a seed feeding tube. The first blower is connected to the air inlet end of the wind distribution box through a pipeline. The top of the seed feeding tube is provided with an opening, the bottom of the seed feeding tube is a wire mesh, and the bottom of the seed feeding tube is connected to the air outlet end of the wind distribution box through a pipeline. By turning on the first blower to blow air, the seeds placed in the seed feeding tube can be blown out from the top of the seed feeding tube;

[0008] The seed transporting device includes: a negative pressure air disc, a negative pressure pipeline, a seed transporting disc, a seed transporting tube, and a transmission shaft. The negative pressure air disc is provided with negative pressure slots and negative pressure partitions. The negative pressure pipeline is connected to the top of the negative pressure air disc. The transmission shaft is vertically installed in the housing. The seed transporting disc is fixedly installed on the transmission shaft. A number of seed transporting holes are circumferentially arranged on the seed transporting disc. The seed transporting tube is installed at a position below the seed transporting disc;

[0009] The seed metering device includes: a driving motor, a seed metering base, a seed metering fan disk, a seed metering pipe, and a second blower. The driving motor is vertically and fixedly installed at the bottom of the housing. The seed metering base is fixedly installed on the top of the driving motor. The seed metering fan disk is arranged and installed in the seed metering base and is fixedly connected to the driving shaft of the driving motor. The driving motor drives the seed metering fan disk to move in the seed metering base;

[0010] The top of the seed metering base is communicated with the seed conveying pipe. The bottom of the seed metering base is provided with seed metering holes. The seed metering pipe is arranged and installed at a position below the seed metering holes. The air outlet end of the second blower is communicated with the seed metering pipe through a pipe. The air inlet end of the second blower is communicated with a negative pressure pipe. By driving the second blower, a negative pressure is generated on the negative pressure disk;

[0011] The transmission device includes: a driving wheel, a transmission belt, and a driven wheel. The driving wheel is fixedly installed on the driving shaft of the driving motor. The driven wheel is fixed on the transmission shaft. The transmission belt is belt-connected between the driving wheel and the driven wheel. By driving the driving motor to drive the driving shaft to rotate, the transmission shaft can be driven to rotate under the transmission of the transmission device;

[0012] The controller respectively establishes electrical connections with the first blower, the driving motor, and the second blower.

[0013] Optionally, in some embodiments of the first aspect:

[0014] A first air outlet pipe and a second air outlet pipe are arranged in the air distribution box. A first solenoid valve and a second solenoid valve are respectively arranged on the first air outlet pipe and the second air outlet pipe;

[0015] The air outlet end of the first air outlet pipe is communicated with the bottom of the seed delivery cylinder through a pipe;

[0016] The seed delivery device further includes: a seed blowing pipe. The air outlet of the seed blowing pipe is correspondingly arranged at the outlet of the seed delivery cylinder;

[0017] The air outlet end of the second air outlet pipe is communicated with the seed blowing pipe through a pipe;

[0018] The controller respectively establishes electrical connections with the first solenoid valve and the second solenoid valve.

[0019] Optionally, in some embodiments of the first aspect:

[0020] The seed metering device further includes: a toner cartridge;

[0021] The toner cartridge is arranged and installed in the housing. The powder outlet end of the toner cartridge is communicated with the seed metering pipe through a pipe.

[0022] Optionally, in some embodiments of the first aspect:

[0023] A seed metering baseplate is provided with a seed metering cover plate on its top, and a seed metering interface is provided on the seed metering cover plate;

[0024] The seed metering interface is communicated with the seed conveying pipe.

[0025] Optionally, in some embodiments of the first aspect:

[0026] A seed conveying baffle is correspondingly arranged at the bottom of the seed conveying hole. The internal volume of the seed conveying baffle is set according to the volume of a conventional single seed and can only accommodate one seed.

[0027] Optionally, in some embodiments of the first aspect:

[0028] A seed detection sensor is arranged at the bottom of the seed metering baseplate, and the seed detection sensor is correspondingly arranged at a position below the seed metering interface;

[0029] An electrical connection is established between the controller and the seed detection sensor.

[0030] Optionally, in some embodiments of the first aspect:

[0031] The transmission shaft in the housing is limited and fixed through the upper limit transmission bearing hole and the lower limit transmission bearing hole;

[0032] The drive shaft of the drive motor in the housing is limited and fixed through the upper limit drive bearing hole.

[0033] Optionally, in some embodiments of the first aspect:

[0034] A seed metering pipe hole is provided on the housing;

[0035] The outlet of the seed metering pipe is limited and fixed through the seed metering pipe hole.

[0036] The second aspect of the present application provides a seed metering method for pneumatically blown small particle size seeds. The seed metering method is applicable to the seed metering device as in the first aspect. The seed metering method includes:

[0037] S1: Control the drive of the first blower to supply air to the air distribution box, and control the first solenoid valve to open and the second solenoid valve to close, so that the first air outlet pipe discharges air. At this time, the seeds in the seed feeding cylinder will be suspended in the seed feeding cylinder in a boiling state under the influence of the air flow, and a small amount of seeds will reach the position of the top orifice of the seed feeding cylinder;

[0038] S2: Control the drive of the second blower to generate negative pressure in the negative pressure air disc through the negative pressure pipe, and the lower surface of the seed conveying disc adsorbs the seeds in the seed conveying holes through the generated negative pressure;

[0039] S3: Control the first solenoid valve to close and the second solenoid valve to open, so that the second air outlet pipe discharges air, causing the seed blowing pipe to blow air and blowing off the redundant seeds adsorbed in the seed transporting holes;

[0040] S4: Control the driving motor to rotate. Under the action of the transmission device, drive the transmission shaft to rotate, drive the seed transporting disc to rotate, and rotate the seed transporting holes to the position of the seed transporting pipe. At this time, the seed transporting holes are just blocked by the negative pressure partition plate, the negative pressure disappears, and the seeds in the seed transporting holes fall into the seed transporting pipe under the action of their own gravity, and are sent into the seed discharging disc through the seed transporting pipe. Under the action of the driving shaft, the seed discharging disc rotates and drives the seeds to move at the same time. When the seeds move to the position of the seed discharging holes, the seeds fall into the seed discharging pipe due to gravity.

[0041] Optionally, in some embodiments of the second aspect:

[0042] This seed discharging method further includes: when the seed detection sensor detects that there are no seeds in the seed discharging disc, control the driving motor to increase the rotation speed to prevent missed seeding.

[0043] The technical solution provided by this application may include the following beneficial effects:

[0044] By providing a seed feeding device in this application, the first blower can supply air to the seed feeding cylinder and the seed blowing pipe respectively, so that the seeds in the seed feeding cylinder are in a boiling state when being supplied with air, and the suspension height of a small amount of seeds reaches the position of the top orifice of the seed feeding cylinder; by providing a seed transporting device, negative pressure can be generated by the negative pressure air disc, and the seed transporting holes can adsorb and transport the seeds at the position of the top orifice of the seed feeding cylinder, and the seeds in the seed transporting holes fall into the seed transporting pipe for transportation; by providing a seed discharging device, the seeds transported through the seed transporting pipe fall into the seed discharging base through the seed discharging interface, drive the seed discharging fan blade disc to rotate by the driving motor, and under the blowing action of the second blower, the seeds are discharged through the seed discharging pipe.

[0045] The seed discharger for small particle size seeds provided by this application, through the design scheme of air-blowing high-speed seed discharging, can discharge small particle size seeds at high speed and with high precision, and has complete functions, simple operation, economic applicability and low cost. During the seed discharging process, the seed discharging performance is good and the efficiency is high, and it can accurately, quickly and effectively discharge seeds in real time, uniformly and at high speed, providing favorable conditions for realizing high-quality seed discharging, reducing costs and operation time, and having good economic and social benefits.

[0046] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and other objects, features, and advantages of the present application will become more apparent by describing the exemplary embodiments of the present application in more detail with reference to the accompanying drawings, wherein, in the exemplary embodiments of the present application, the same reference numerals generally represent the same components.

[0048] Figure 1 is a schematic structural view of a seed metering device for pneumatically conveying small-sized seeds in an embodiment of the present application;

[0049] Figure 2 is a schematic structural view of a seed feeding device in an embodiment of the present application;

[0050] Figure 3 is a schematic internal pipeline structural view of a sub-air box in an embodiment of the present application;

[0051] Figure 4 is a schematic rear view structural view of a seed transporting device and a seed metering device in an embodiment of the present application;

[0052] Figure 5 is a schematic front view structural view of a seed transporting device and a seed metering device in an embodiment of the present application;

[0053] Figure 6 is a schematic structural view of a seed metering device in an embodiment of the present application;

[0054] Figure 7 is a schematic installation structural view of a seed metering fan blade disc in an embodiment of the present application;

[0055] Figure 8 is a schematic bottom structural view of a seed metering base in an embodiment of the present application;

[0056] Figure 9 is a schematic structural view of a seed transporting device in an embodiment of the present application;

[0057] Figure 10 is a schematic bottom structural view of a seed transporting disc in an embodiment of the present application;

[0058] Figure 11 is a schematic structural view of a wind pressure air disc in an embodiment of the present application;

[0059] Figure 12 is a schematic structural view of a transmission device in an embodiment of the present application;

[0060] Figure 13 is a schematic structural view of a housing in an embodiment of the present application.

[0061] Reference numerals:

[0062] 1 - Seed metering device, 101 - Seed metering cover plate, 1011 - Seed metering interface, 1012 - Seed metering fan disk, 1013 - Seed metering base, 1014 - Seed metering holes, 1015 - Seed detection sensor, 102 - Drive shaft, 103 - Second fan, 104 - Toner cartridge, 105 - Seed metering pipeline, 106 - Drive motor;

[0063] 2 - Transmission device, 201 - Driving wheel, 202 - Transmission belt, 203 - Driven wheel;

[0064] 3 - Seed transporting device, 301 - Negative pressure air disk, 3011 - Negative pressure partition, 3012 - Negative pressure slot holes, 302 - Exhaust duct, 303 - Seed transporting pipe, 304 - Seed transporting disk, 3041 - Seed transporting shaped holes, 3042 - Seed transporting baffle, 305 - Transmission shaft;

[0065] 4 - Housing, 401 - Drive shaft limit bearing hole, 402 - Upper limit bearing hole of transmission shaft, 403 - Seed metering pipe through hole, 404 - Lower limit bearing hole of transmission shaft;

[0066] 5 - Seed feeding device, 501 - First fan, 502 - Air distribution box, 5021 - First solenoid valve, 5022 - Second solenoid valve, 503 - Seed feeding cylinder, 5031 - Wire mesh, 504 - Seed blowing pipe;

[0067] 6 - Controller. Detailed implementation manners

[0068] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0069] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0070] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0071] Unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0072] As the core working component of a seeder, the metering device changes its rotational speed in real time according to the change of the seeding operation speed. High-speed seeding requires that the rotational speed of the metering device changes with the vehicle speed while ensuring high precision and smooth transmission. Its performance directly determines the seeding quality and crop yield.

[0073] Traditional air-suction metering devices generally adopt mechanical transmission methods such as chains or drive shafts 305. When the seeding operation speed is relatively fast, due to the dynamic response lag and vibration of the transmission system, seed adsorption failure may occur in the edge area of the suction disc, resulting in missed seeding. At the same time, seeds may be ejected inside the suction cavity, and the seeding uniformity is poor, affecting the planting yield.

[0074] In view of the above problems, the embodiments of the present application provide a metering device and a metering method for air-blowing small-sized seeds, which can achieve high-speed and precise discharge of small-sized seeds, with high seeding efficiency and good seeding performance.

[0075] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.

[0076] See Figures 1 - 13 , a metering device for air-blowing small-sized seeds, which includes: a seed feeding device 5, a seed transporting device 3, a metering device 1, a transmission device 2, a housing 4, and a controller 6. The seed transporting device 3, the metering device 1, and the transmission device 2 are installed in the housing 4.

[0077] The seed feeding device 5 includes: a first fan 501, a wind distribution box 502, and a seed feeding tube 503. The first fan 501 is connected to the air inlet end of the wind distribution box 502 through a pipeline. The top of the seed feeding tube 503 is provided with an opening, and the bottom of the seed feeding tube 503 is a wire mesh 5031. The bottom of the seed feeding tube 503 is connected to the air outlet end of the wind distribution box 502 through a pipeline. By turning on the first fan 501 to blow air, the seeds placed in the seed feeding tube 503 can be blown out from the top of the seed feeding tube 503. Among them, the wire mesh 5031 is a wire net 5031, and the minimum mesh diameter of the wire net 5031 is smaller than the minimum diameter of the seeds.

[0078] Specifically: a first air outlet pipe and a second air outlet pipe are arranged in the wind distribution box 502, and a first electromagnetic valve 5021 and a second electromagnetic valve 5022 are respectively arranged on the first air outlet pipe and the second air outlet pipe; the air outlet end of the first air outlet pipe is connected to the bottom of the seed feeding tube 503 through a pipeline.

[0079] The seed feeding device 5 further includes: a seed blowing pipe 504, and the air outlet of the seed blowing pipe 504 is correspondingly arranged at the outlet of the seed feeding tube 503; the air outlet end of the second air outlet pipe is connected to the seed blowing pipe 504 through a pipeline.

[0080] The controller 6 establishes electrical connections with the first electromagnetic valve 5021 and the second electromagnetic valve 5022 respectively.

[0081] In this embodiment, by arranging the first air outlet pipe and the second air outlet pipe in the wind distribution box 502, the first fan 501 can supply air to the seed feeding tube 503 and the seed blowing pipe 504 respectively. By respectively arranging the first electromagnetic valve 5021 and the second electromagnetic valve 5022 on the first air outlet pipe and the second air outlet pipe, the on-off and the air supply amount of the first air outlet pipe can be controlled, so as to better control the seeds in the seed feeding tube 503, making the seeds in the seed feeding tube 503 in a boiling state when air is supplied, and the suspension height of a small amount of seeds reaches the position of the top orifice of the seed feeding tube 503. At the same time, the on-off and the air supply amount of the second air outlet pipe can be controlled to blow the top orifice of the seed feeding tube 503 and blow off the excess seeds.

[0082] This seeding device 3 includes: a negative pressure air disc 301, a negative pressure pipeline, a seeding disc 304, a seeding pipe 303, and a transmission shaft 305. The negative pressure air disc 301 is provided with negative pressure slots 3012 and a negative pressure partition 3011. The negative pressure pipeline is connected to the top of the negative pressure air disc 301. The transmission shaft 305 is vertically installed in the housing 4. The seeding disc 304 is fixedly installed on the transmission shaft 305. A number of seeding holes 3041 are circumferentially arranged on the seeding disc 304. The seeding pipe 303 is installed at a position below the seeding disc 304. Among them, the negative pressure air disc 301 is a hollow disc with the same diameter as the seeding disc 304. A negative pressure partition 3011 is installed on one side of the negative pressure air disc 301, and the negative pressure slots 3012 on the other side are connected to the air extraction pipeline 302 of the second blower 103 in the seeding device 1 to generate negative pressure in the negative pressure air disc 301. The seeding disc 304 is installed at a position above the blowing pipe 504.

[0083] Specifically: a seeding baffle 3042 is correspondingly arranged at the bottom of the seeding hole 3041. The internal volume of the seeding baffle 3042 is set according to the volume of a conventional single seed and can only accommodate one seed. Among them, the diameter of the seeding hole 3041 is smaller than the minimum diameter of the target seed.

[0084] In this embodiment, by setting the negative pressure air disc 301 to generate negative pressure, the seeding holes 3041 located at the position below the negative pressure slots 3012 can generate negative pressure. When the transmission shaft 305 drives the seeding disc 304 to rotate, the seeding holes 3041 can adsorb and transport the seeds at the top orifice position of the seed delivery tube 503. When rotating to the position below the negative pressure partition 3011, the negative pressure disappears, and the seeds in the seeding holes 3041 fall into the seeding pipe 303 for transportation. By setting the seeding baffle 3042 in this application, the adsorption effect of the seeds can be further ensured. At the same time, by cooperating with the blowing pipe 504, each seeding hole 3041 can adsorb only one seed each time, enabling the seeds to be stably discharged one by one.

[0085] This seeding device 1 includes: a driving motor 106, a seeding base 1013, a seeding fan blade disc 1012, a seeding pipeline 105, and a second blower 103. The driving motor 106 is vertically and fixedly installed at the bottom of the housing 4. The seeding base 1013 is fixedly installed on the top of the driving motor 106. The seeding fan blade disc 1012 is installed in the seeding base 1013 and is fixedly connected to the drive shaft 102 of the driving motor 106. The driving motor 106 drives the seeding fan blade disc 1012 to move in the seeding base 1013.

[0086] The top of the seed metering base 1013 is communicated with the seed conveying pipe 303. The bottom of the seed metering base 1013 is provided with seed metering holes 1014. The seed metering pipe 105 is installed at a position below the seed metering holes 1014. The air outlet end of the second blower 103 is communicated with the seed metering pipe 105 through a pipe, and the air inlet end of the second blower 103 is communicated with a negative pressure pipe. By driving the second blower 103, a negative pressure is generated on the negative pressure air disc 301.

[0087] Specifically: The top of the seed metering base 1013 is provided with a seed metering cover plate 101, and a seed metering interface 1011 is arranged on the seed metering cover plate 101; the seed metering interface 1011 is communicated with the seed conveying pipe 303.

[0088] In this embodiment, by communicating the top of the seed metering base 1013 with the seed conveying pipe 303 of the seed conveying device 3, the seeds conveyed through the seed conveying pipe 303 fall into the seed metering base 1013 through the seed metering interface 1011. When the driving motor 106 drives the seed metering fan blade disc 1012 to rotate, the seed metering fan blade disc 1012 pushes the seeds to the seed metering holes 1014, and then the seeds fall into the seed metering pipe 105 and are discharged through the seed metering pipe 105 under the blowing action of the second blower 103.

[0089] Specifically: A seed detection sensor 1015 is arranged at the bottom of the seed metering base 1013, and the seed detection sensor 1015 is correspondingly arranged at a position below the seed metering interface 1011; an electrical connection is established between the controller 6 and the seed detection sensor 1015. Among them, the seed detection sensor 1015 is a photoelectric detection sensor.

[0090] In this embodiment, by setting the seed detection sensor 1015, the conveying condition of the seeds can be detected. When the seed detection sensor 1015 detects that there are no seeds, the driving motor 106 is controlled to increase the rotation speed to prevent missed seeding.

[0091] Specifically: The seed metering pipe 105 hole is arranged on the housing 4; the outlet of the seed metering pipe 105 is limited and fixed through the seed metering pipe 105 hole.

[0092] Specifically: The transmission shaft 305 in the housing 4 is limited and fixed through the upper limit transmission shaft 305 bearing hole and the lower limit transmission shaft 305 bearing hole; the driving shaft 102 of the driving motor 106 in the housing 4 is limited and fixed through the upper limit driving shaft 102 bearing hole.

[0093] In this embodiment, by fixedly installing the transmission shaft 305 and the driving shaft 102 of the driving motor 106 in the housing 4, the installation stability of the structure can be improved, and the normal operation of the device can be ensured.

[0094] The transmission device 2 includes: a driving wheel 201, a transmission belt 202 and a driven wheel 203. The driving wheel 201 is fixedly mounted on the driving shaft 102 of the driving motor 106, and the driven wheel 203 is fixed on the transmission shaft 305. The transmission belt 202 is connected between the driving wheel 201 and the driven wheel 203. The driving motor 106 drives the driving shaft 102 to rotate, so that the transmission shaft 305 can rotate under the transmission of the transmission device 2.

[0095] In this embodiment, by providing a transmission device 2 and transmitting through a transmission belt 202, the transmission is stable, fast, and has little vibration, which can effectively ensure the normal operation of the seed metering device and improve the efficiency of sowing.

[0096] Specifically, the seed metering device further includes a carbon powder box 104 ; the carbon powder box 104 is installed in the housing 4 , and a powder outlet end of the carbon powder box 104 is connected to the seed metering pipe 105 through a pipe.

[0097] In this embodiment, by providing a carbon powder box 104, a small amount of carbon powder is allowed to enter the seeding pipe 105 under the negative pressure of the second fan 103 to be mixed and wrapped with the seeds, thereby increasing the fluidity of the seeds and reducing the surface friction coefficient. Subsequently, the carbon powder entrains the seeds and is discharged individually under the action of the airflow, thereby effectively improving the sowing quality.

[0098] The controller 6 is electrically connected to the first fan 501, the drive motor 106 and the second fan 103. The controller 6 is a PLC controller 6 or a single chip controller 6, which is installed on the top of the air box 502.

[0099] In this embodiment, the controller 6 performs unified control to ensure the operational stability of the seed metering device.

[0100] Corresponding to the aforementioned application function realization device embodiment, the present application also provides an air-blowing small-size seed sowing method and corresponding embodiments.

[0101] See also Figure 2 A method for sowing seeds of small-size seeds by air blowing is applicable to the seed sowing device in the above specific embodiment, and the method comprises:

[0102] S1: Control and drive the first fan 501 to supply air to the air box 502, and control the first solenoid valve 5021 to open and the second solenoid valve 5022 to close, so that the first air outlet pipe can discharge air. At this time, the seeds in the seed delivery cylinder 503 will be suspended in the seed delivery cylinder 503 in a boiling state under the influence of the airflow, and the suspension height of a small amount of seeds reaches the top opening position of the seed delivery cylinder 503;

[0103] S2: Control the driving of the second blower 103 to generate negative pressure in the negative pressure air disc 301 through the negative pressure pipeline. The seeds are adsorbed in the seed transporting holes 3041 on the lower surface of the seed transporting disc 304 by the generated negative pressure.

[0104] S3: Control the first solenoid valve 5021 to close and the second solenoid valve 5022 to open, so that the second air outlet pipe discharges air, causing the seed blowing pipe 504 to blow air and blow off the redundant seeds adsorbed in the seed transporting holes 3041.

[0105] S4: Control the driving motor 106 to rotate. Under the action of the transmission device 2, drive the transmission shaft 305 to rotate, and the seed transporting disc 304 is driven to rotate, turning the seed transporting holes 3041 to the position of the seed transporting pipe 303. At this time, the seed transporting holes 3041 are just blocked by the negative pressure partition 3011, the negative pressure disappears, and the seeds in the seed transporting holes 3041 fall into the seed transporting pipe 303 under the action of their own gravity, and are sent to the seed discharging disc through the seed transporting pipe 303. Under the action of the driving shaft 102, the seed discharging disc rotates and drives the seeds to move at the same time. When the seeds move to the position of the seed discharging hole 1014, the seeds fall into the seed discharging pipeline 105 due to gravity.

[0106] Specifically: When the seed detection sensor 1015 detects that there are no seeds in the seed discharging disc, control the driving motor 106 to increase the rotation speed to prevent missed seeding.

[0107] In this embodiment, through this seed discharging method for air-blowing small-diameter seeds, accurate, fast, and effective real-time uniform high-speed seed discharging can be achieved, providing favorable conditions for realizing high-quality seed discharging, reducing costs and operation time, and improving work efficiency.

[0108] The technical solutions in the embodiments of the present application include the following beneficial effects:

[0109] In the present application, by setting the seed feeding device 5, the first blower 501 can supply air to the seed feeding cylinder 503 and the seed blowing pipe 504 respectively, so that the seeds in the seed feeding cylinder 503 are in a boiling state when being supplied with air, and a small amount of seeds are suspended to reach the top orifice position of the seed feeding cylinder 503; by setting the seed transporting device 3, negative pressure can be generated through the negative pressure air disc 301, and the seed transporting holes 3041 can adsorb and transport the seeds at the top orifice position of the seed feeding cylinder 503, and the seeds in the seed transporting holes 3041 fall into the seed transporting pipe 303 for transportation; by setting the seed discharging device 1, the seeds transported through the seed transporting pipe 303 fall into the seed discharging base 1013 through the seed discharging interface 1011, drive the seed discharging fan blade disc 1012 to rotate through the driving motor 106, and under the blowing action of the second blower 103, the seeds are discharged through the seed discharging pipeline 105.

[0110] The seed metering device for small-diameter seeds provided by this application, through the design of high-speed air-blowing seed metering, can discharge small-diameter seeds at high speed and with high precision. It has complete functions, is easy to operate, economical and applicable, and has a low cost. During the seed metering process, it has good seed metering performance and high efficiency, can accurately, quickly, and effectively discharge seeds evenly and at high speed in real time, provides favorable conditions for achieving high-quality seed metering, reduces costs and operation time, and has good economic and social benefits.

[0111] Finally, it should also be noted that in this text, relationships such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0112] The unit described as a separation component may or may not be physically separated. The component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0113] In addition, in each embodiment of this application, each functional unit can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0114] The above has described the embodiments of this application. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art in this technical field without departing from the scope and spirit of the described embodiments. The selection of the terms used in this text is intended to best explain the principles of the embodiments, the actual application or the improvement of the technology in the market, or to enable other ordinary technical personnel in this technical field to understand the embodiments disclosed in this text.

Claims

1. An air-blowing seed metering device for small-sized seeds, characterized in that, The seed metering device includes: a seed feeding device (5), a seed transporting device (3), a seed metering device (1), a transmission device (2), a housing (4) and a controller (6). The seed transporting device (3), the seed metering device (1) and the transmission device (2) are installed in the housing (4). The seed feeding device (5) includes: a first blower (501), an air distribution box (502) and a seed feeding cylinder (503). The first blower (501) is connected to the air inlet end of the air distribution box (502) through a pipeline. The top of the seed feeding cylinder (503) is provided with an opening. The bottom of the seed feeding cylinder (503) is a wire mesh (5031). The bottom of the seed feeding cylinder (503) is connected to the air outlet end of the air distribution box (502) through a pipeline. By turning on the first blower (501) to blow air, the seeds placed in the seed feeding cylinder (503) can be blown out from the top of the seed feeding cylinder (503). The seed transporting device (3) includes: a negative pressure air disc (301), a negative pressure pipeline, a seed transporting disc (304), a seed transporting pipe (303) and a transmission shaft (305). The negative pressure air disc (301) is provided with negative pressure slots (3012) and negative pressure partitions (3011). The negative pressure pipeline is connected to the top of the negative pressure air disc (301). The transmission shaft (305) is vertically installed in the housing (4). The seed transporting disc (304) is fixedly installed on the transmission shaft (305). A number of seed transporting holes (3041) are circumferentially arranged on the seed transporting disc (304). The seed transporting pipe (303) is installed at a position below the seed transporting disc (304). The seed metering device (1) includes: a driving motor (106), a seed metering base (1013), a seed metering fan disc (1012), a seed metering pipeline (105) and a second blower (103). The driving motor (106) is vertically and fixedly installed at the bottom of the housing (4). The seed metering base (1013) is fixedly installed on the top of the driving motor (106). The seed metering fan disc (1012) is installed in the seed metering base (1013) and is fixedly connected to the driving shaft (102) of the driving motor (106). The driving motor (106) drives the seed metering fan disc (1012) to move in the seed metering base (1013). The top of the seed metering base (1013) is connected to the seed transporting pipe (303). The bottom of the seed metering base (1013) is provided with a seed metering hole (1014). The seed metering pipeline (105) is installed at a position below the seed metering hole (1014). The air outlet end of the second blower (103) is connected to the seed metering pipeline (105) through a pipeline. The air inlet end of the second blower (103) is connected to the negative pressure pipeline. By driving the second blower (103), negative pressure is generated on the negative pressure air disc (301). The transmission device (2) includes: a driving wheel (201), a transmission belt (202), and a driven wheel (203). The driving wheel (201) is fixedly installed on the driving shaft (102) of the driving motor (106). The driven wheel (203) is fixed on the transmission shaft (305). The transmission belt (202) is belt-connected between the driving wheel (201) and the driven wheel (203). By driving the driving shaft (102) to rotate through the driving motor (106), the transmission shaft (305) can be driven to rotate under the transmission of the transmission device (2); The controller (6) establishes electrical connections with the first blower (501), the driving motor (106), and the second blower (103) respectively.

2. The seed metering device for pneumatically blowing small-sized seeds according to claim 1, characterized in that: The air distribution box (502) is provided with a first air outlet pipe and a second air outlet pipe, and a first solenoid valve (5021) and a second solenoid valve (5022) are respectively arranged on the first air outlet pipe and the second air outlet pipe; The air outlet end of the first air outlet pipe is connected to the bottom of the seed delivery cylinder (503) through a pipeline; The seed delivery device (5) further includes: a seed blowing pipe (504), and the air outlet of the seed blowing pipe (504) is correspondingly arranged at the outlet of the seed delivery cylinder (503); The air outlet end of the second air outlet pipe is connected to the seed blowing pipe (504) through a pipeline; The controller (6) establishes electrical connections with the first solenoid valve (5021) and the second solenoid valve (5022) respectively.

3. The seed metering device for pneumatically blowing small-sized seeds according to claim 2, characterized in that: The seed metering device further includes: a toner cartridge (104); The toner cartridge (104) is installed in the housing (4), and the powder outlet end of the toner cartridge (104) is connected to the seed metering pipeline (105) through a pipeline.

4. The seed metering device for pneumatically blowing small-sized seeds according to claim 3, characterized in that: A seed metering cover plate (101) is arranged on the top of the seed metering base (1013), and a seed metering interface (1011) is arranged on the seed metering cover plate (101); The seed metering interface (1011) is connected to the seed transporting pipe (303).

5. The seed metering device for pneumatically blowing small-sized seeds according to claim 4, characterized in that: A seed transporting baffle (3042) is correspondingly arranged at the bottom of the seed transporting hole (3041). The internal volume of the seed transporting baffle (3042) is set according to the volume of a conventional single seed and can only accommodate one seed.

6. The seed metering device for pneumatically blowing small-sized seeds according to claim 5, characterized in that: A seed detection sensor (1015) is arranged at the bottom of the seed metering base (1013), and the seed detection sensor (1015) is correspondingly arranged below the seed metering interface (1011); The controller (6) establishes an electrical connection with the seed detection sensor (1015).

7. The seed metering device for pneumatically blowing small-sized seeds according to claim 1, characterized in that: The drive shaft (305) in the housing (4) is limited and fixed by the upper limit drive shaft (305) bearing hole and the lower limit drive shaft (305) bearing hole; The drive shaft (102) of the drive motor (106) in the housing (4) is limited and fixed by the upper limit drive shaft (102) bearing hole.

8. The metering device for small-diameter seeds with air blowing according to claim 7, characterized in that: The housing (4) is provided with a metering pipe (105) hole; The outlet of the metering pipe (105) is limited and fixed through the metering pipe (105) hole.

9. A method for metering small-sized seeds by air blowing, characterized in that, The metering method is applicable to the metering device according to any one of claims 1-8, and the metering method includes: S1: Control the drive of the first blower (501) to supply air to the air distribution box (502), and control the first solenoid valve (5021) to open and the second solenoid valve (5022) to close, so that the first air outlet pipe discharges air. At this time, the seeds in the seed delivery cylinder (503) will be suspended in the seed delivery cylinder (503) in a boiling state under the influence of the air flow, and a small amount of seeds will reach the position of the top orifice of the seed delivery cylinder (503); S2: Control the drive of the second blower (103) to generate negative pressure in the negative pressure air disc (301) through the negative pressure pipe, and the lower surface of the seed transporting disc (304) adsorbs the seeds in the seed transporting holes (3041) under the generated negative pressure; S3: Control the first solenoid valve (5021) to close and the second solenoid valve (5022) to open, so that the second air outlet pipe discharges air, causing the seed blowing pipe (504) to blow air and blow off the excess seeds adsorbed in the seed transporting holes (3041); S4: Control the drive motor (106) to rotate. Under the action of the transmission device (2), the drive shaft (305) rotates, and the seed transporting disc (304) is driven to rotate, turning the seed transporting holes (3041) to the position of the seed transporting pipe (303). At this time, the seed transporting holes (3041) are just blocked by the negative pressure partition (3011), the negative pressure disappears, and the seeds in the seed transporting holes (3041) fall into the seed transporting pipe (303) under the action of their own gravity, and are sent to the metering disc through the seed transporting pipe (303). Under the action of the drive shaft (102), the metering disc rotates and drives the seeds to move at the same time. When the seeds move to the position of the metering hole (1014), the seeds fall into the metering pipe (105) due to gravity.

10. The metering method of small particle size seeds by air blowing according to claim 9, characterized in that, The metering method further includes: When the seed detection sensor (1015) detects that there are no seeds in the metering disc, control the drive motor (106) to increase the rotation speed, To prevent missed seeding.

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