A pneumatic seed disturbance type seed metering device cover

Abstract

The present invention relates to a component on an agricultural seeder, in particular to a pneumatic seed disturbance type seed metering device cover. Aiming at the problem that there is a large speed difference between the seed suction port of a moving seeding disc and relatively stationary seeds during operation of the current air suction type seed metering device, the present invention designs a pneumatic seed disturbance type seed metering device cover with speed compensation. The seed filling port (8) of the seed metering device cover adopts a design scheme in which a rotary seed dropping port (9) is located at the top and a second seed box seed dropping port (10) is located at the bottom, so that the seeds at the rotary seed dropping port (9) enter the seed filling chamber (3) first, and a pneumatic seed disturbance circuit is established by a ventilation pipe (6), a U-shaped rotary pipeline (11), and a rotary seed dropping pipe (17), so that the gas blown out of the ventilation pipe (6) drives the seeds in the seed filling chamber (3) to perform a rotary motion in the pneumatic seed disturbance circuit, thereby reducing the relative speed difference between the seeds and the seed suction port of the seeding disc, thereby improving the seed filling performance and seed filling quality of the seed metering device.

Description

Technical Field

[0001] The invention belongs to agricultural machinery parts, and mainly relates to a pneumatic seed disturbance type seed metering device cover. Background Art

[0002] At present, the air-suction precision seed meter is one of the commonly used seed meters in agricultural machinery sowing operations. It has the advantages of saving seeds, not damaging seeds, not strict requirements on seed size, and high operating speed. In the past, the seed meter cover body matched with the air-suction seed metering disc was a closed shell, and the seed disturbance work in the seed filling chamber was achieved by adding a seed disturbance mechanism to the seed metering disc, which not only increased the movement resistance of the seed metering disc, but also caused a large speed difference between the moving seed suction port of the air-suction seed metering disc and the relatively static seeds during operation. The linear speed of the seed suction port of the air-suction seed metering disc is too fast, which will affect the seed filling effect and quality of the seed suction port of the seed metering disc. The present invention has made a new design for the air-suction seed metering device cover body, and in order to overcome the above-mentioned shortcomings, a pneumatic seed disturbance type seed metering device cover body is provided. Summary of the invention

[0003] The purpose of the invention is to design a pneumatic seed disturbance type seed metering device cover, which adopts an air-blowing seed disturbance method to establish a pneumatic seed disturbance circuit, so that the seeds in the seed filling chamber have a speed in the same direction as the seed suction port of the seed metering disk, and can automatically adjust the air flow speed through the seed filling chamber according to the operating speed, so as to meet the agronomic sowing requirements.

[0004] The purpose of the invention is achieved in this way: a pneumatic seed disturbance type seed metering device cover belongs to an agricultural machinery component, is used in conjunction with an air suction type electric seed metering disc, and is mainly composed of a seed guide tube, a baffle, a ventilation tube, a seed dropping port, a seed filling port, a U-shaped rotary pipeline, a seed cleaner, a cover body, a second seed box, and a rotary seed dropping tube; wherein the seed filling port is composed of an upper rotary seed dropping port and a lower second seed box seed dropping port, the seed filling port is vertically connected to the air outlet plane of the ventilation tube, the cover body between the air outlet and the rotary pipeline inlet constitutes a seed filling chamber, the curvature of the cover body of the seed filling chamber corresponds to the curvature of the seed suction port of the seed metering disc, the cover body of the seed filling chamber is below the seed suction port of the seed metering disc, and is adjacent to the seed suction port of the seed metering disc; the rotary pipeline inlet is opened on the side wall above the cover body of the seed filling chamber, and is connected to the U-shaped rotary pipeline. The seed dropping channel and the rotary seed dropping tube constitute a rotary seed dropping area; the seeds in the seed box enter the vertical seed guide tube through the seed box opening, and the lower end of the vertical seed guide tube is a second box that is inclined downward, the inlet and outlet of the second box do not intersect in the horizontal plane in the vertical projection, the seed dropping port plane of the second box is vertically connected to the plane of the seed filling port laterally, the seed dropping port of the second box is located below the seed filling port, and the rotary seed dropping port is below; the air outlet and the baffle are on the same plane, the end of the baffle away from the shell is closely connected to the air suction electric seeding disc, and the upper end of the baffle is at a certain distance from the side wall of the cover body to ensure that the seed suction port of the seeding disc that absorbs the seeds passes through without touching the seeds absorbed on the seed suction port of the seeding disc; the ventilation pipe can be a ventilation duct or an independent powerful small fan, and the shape of the pipe is not limited;

[0005] The pneumatic seed disturbance type seed metering device cover has a U-shaped rotating pipe with a U-shaped structure, the inlet width is gradually smaller than the outlet, and the low point of the inlet end of the U-shaped rotating pipe is higher than the low point of the outlet end. Due to the height difference, the seeds tend to move downward under the action of gravity;

[0006] The pneumatic seed disturbance type seed metering device cover has a rotary seed drop port located above the seed drop port of the second seed box. Under the influence of gravity and airflow, the seeds at the rotary seed drop port enter the seed filling chamber before the seeds at the seed drop port of the second seed box.

[0007] When the pneumatic seed disturbance type seed metering device cover is in operation, the pneumatic seed disturbance circuit is composed of the seed filling chamber cover, the rotary pipe inlet, the U-shaped rotary pipe, the rotary seed dropping pipe, the rotary seed dropping port, and the seed filling port. The gas blown out of the ventilation pipe drives the seeds in the seed filling chamber to circulate back and forth in the pneumatic seed disturbance circuit; the gas speed blown out of the ventilation pipe matches the angular velocity of the seeding disk, so that the seeds match the linear velocity of the seed suction port of the seeding disk. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 Left view of the inside of the cover of the pneumatic seed disturbance meter.

[0009] Figure 2 Right view of the inside of the cover of the pneumatic seed disturbance meter.

[0010] Figure 3 External view of the cover of the pneumatic seed disturbance meter.

[0011] Figure 4 Top view of the cover of the pneumatic seed disturbance meter.

[0012] Description of part numbers in the figure:

[0013] 1. Seed box opening, 2. Seed guide tube, 3. Seed filling chamber, 4. Baffle, 5. Air outlet, 6. Ventilation pipe, 7. Seed dropping opening, 8. Seed filling opening, 9. Rotary seed dropping opening, 10. Seed dropping opening for the second seed box, 11. U-shaped rotary pipe, 12. Rotary pipe inlet, 13. Seed cleaner, 14. Cover, 15. Air inlet, 16. Second seed box, 17. Rotary seed dropping pipe DETAILED DESCRIPTION

[0014] The following is a detailed description of the implementation scheme of the invention in conjunction with the accompanying drawings. A pneumatic seed disturbance type seed metering device cover is composed of a seed guide tube 2, a baffle 4, a ventilation tube 6, a seeding port 7, a seed filling port 8, a U-shaped rotary pipeline 11, a seed cleaner 13, a cover 14, a second seed box 16, and a rotary seed dropping tube 17; wherein the seed filling port 8 is composed of an upper rotary seed dropping port 9 and a lower second seed box seed dropping port 10, the seed filling port 8 is vertically connected to the air outlet 5 of the ventilation tube 6, the air outlet 5 and the rotary pipeline inlet 12 The cover 14 forms a seed filling chamber 3, and the seed filling chamber 3 The arc of the cover 14 corresponds to the arc of the seed suction port of the seeding disk, and the cover 14 of the seed filling chamber 3 is below the seed suction port of the seeding disk, and is close to the seed suction port of the seeding disk; the rotary pipe inlet 12 is opened on the side wall above the cover 14 of the seed filling chamber 3, and forms a rotary seed dropping area with the U-shaped rotary pipe 11 and the rotary seed dropping pipe 17; the seeds in the seed box enter the vertical seed guide pipe 2 through the seed box opening 1, and the lower end of the vertical seed guide pipe 2 is a second seed box 16 that is inclined downward, and the inlet and outlet of the second seed box 16 are vertically projected. The two sides of the first seeding port 10 and the second seeding port 8 are not intersected in the horizontal plane. The plane of the second seeding port 10 is vertically connected to the plane of the seed filling port 8. The second seeding port 10 is located below the seed filling port 8 and below the rotary seeding port 9. The air outlet 5 and the baffle 4 are on the same plane. The baffle 4 is close to the air suction type electric seeding disc away from the shell. The upper end of the baffle 4 is at a certain distance from the side wall of the cover body 14, which can ensure that the seeding disc suction port for adsorbing seeds passes through without touching the seeds adsorbed on the seeding disc suction port. The ventilation pipe 6 It can be a ventilation duct or an independent powerful small fan, and the shape of the duct is not limited; the U-shaped rotary duct 11 presents a U-shaped structure, the inlet width is gradually smaller than the outlet, the low point of the inlet end of the U-shaped rotary duct 11 is higher than the low point of the outlet end, and due to the height difference, the seeds tend to move downward under the action of gravity; the rotary seed drop port 9 is located at the upper end of the second seed box seed drop port 10, and the plane of the second seed box seed drop port 10 is at the same height and vertical to the right of the plane of the seed filling port 8, and the rotary seed drop port 9 is directly opposite to the upper end of the seed filling port 8;

[0015] During operation, the pneumatic seed disturbance circuit composed of the seed filling chamber 3 cover 14, the rotary pipe inlet 12, the U-shaped rotary pipe 11, the rotary seed dropping pipe 17, the rotary seed dropping port 9, and the seed filling port 8, the gas blown out of the ventilation pipe 6 drives the seeds in the seed filling chamber 3 to circulate back and forth in the pneumatic seed disturbance circuit, reducing the relative speed difference between the seeds and the seed suction port of the seeding disc, and improving the seed filling performance and seed filling quality of the seeding device;

[0016] During operation, the seeds in the seed filling chamber 3 have a speed after passing through the pneumatic seed disturbance circuit. Under the influence of gravity and airflow, the seeds falling from the rotary seed drop port 9 have priority over the seeds from the second seed box seed drop port 10 to enter the seed filling chamber 3, and the number of seeds from the second seed box 16 entering the seed filling chamber 3 is limited. The rotary motion of the seeds also ensures that the seeds from the second seed box 16 can be continuously input into the seed filling chamber 3 as needed, so that the seeds in the pneumatic seed disturbance circuit are kept within a certain quantity range.

[0017] During operation, the control system controls the speed of the gas blown out of the air outlet 5 of the ventilation pipe 6 according to the angular speed of the electric seeding disc, so that the linear speed of the seeds and the seed suction port of the seeding disc match;

[0018] During operation, the air-suction electric seeding disc is in operation, and the seeds in the seed filling chamber 3 have an initial velocity in the same direction as the rotation speed of the seeding disc under the action of wind. The relative speed between the seeds and the seed suction port of the seeding disc is low, and the seeds are easily adsorbed by the seed suction port of the seeding disc, and the adsorbed seeds move with the seeding disc. The excess seeds removed by the seed cleaner 13 rotate along with other seeds in the seed filling chamber 3, and the remaining seeds are dropped and sown by the seed dropping mechanism at the seed dropping port 7. The seeds in the seed filling chamber 3 that are not adsorbed enter the U-shaped rotary pipe 11 through the rotary pipe inlet 12 under the action of wind and fall into the rotary seed dropping pipe 17, enter the seed filling port 8 from the rotary seed dropping port 9, re-enter the seed filling chamber 3, and enter the next seed filling process.

[0019] As an embodiment of the present invention: a gas outlet can be opened above the intersection of the U-shaped rotary pipe 11 and the rotary seed dropping pipe 17, and a mesh pipe is provided at the newly opened gas outlet; the pipe space at the intersection of the three pipes is larger than the U-shaped rotary pipe 11, and the wind speed passing through this place will be reduced; the newly opened gas outlet is connected to the air inlet 15 through a pipe, and a powerful small fan is installed in the ventilation pipe 6, thereby establishing a closed gas movement loop in the cover body of the pneumatic disturbance seed metering device.

[0020] During operation, the adsorbed seeds are planted along with the movement of the seed plate, and the unadsorbed seeds enter the U-shaped rotary pipe 11 through the rotary pipe inlet 12 under the action of wind. Since the wind force is reduced at the junction of the U-shaped rotary pipe 11, the rotary seed dropping pipe 17 and the newly opened gas outlet, the seeds fall into the rotary seed dropping pipe 17 under the action of gravity, and then enter the seed filling port 8 from the rotary seed dropping port 9 to enter the next cycle; the gas passing through the intersection of the three pipes enters the pipe from the newly opened gas outlet under the action of a powerful small fan and returns to the air inlet 15 to enter the next cycle.

[0021] Although the purpose, concept and examples of the present invention have been described in detail with reference to the accompanying drawings, those skilled in the art can recognize that various improvements and modifications can be made to the present invention without departing from the scope defined in the claims, and such improvements and modifications should fall within the scope of protection of the present invention.

Claims

1. A pneumatic seed disturbance type seed metering device cover, characterized in that: The seeding device cover is used in conjunction with an air suction type electric seeding disc, and the seeding device cover is composed of a seed guide tube (2), a baffle (4), a ventilation tube (6), a seeding port (7), a seed filling port (8), a U-shaped rotary pipeline (11), a seed cleaner (13), a cover (14), a second seed box (16), and a rotary seed dropping tube (17); wherein the seed filling port (8) is composed of an upper rotary seed dropping port (9) and a lower second seed box seed dropping port (10); the seed filling port (8) is vertically connected to the air outlet (5) of the ventilation tube (6); the cover (14) between the air outlet (5) and the rotary pipeline inlet (12) constitutes a seed filling chamber (3); the cover (14) of the seed filling chamber (3) 4) The arc corresponds to the arc of the seed suction port of the seeding disk, the cover (14) of the seed filling chamber (3) is below the seed suction port of the seeding disk and is adjacent to the seed suction port of the seeding disk; the rotary pipe inlet (12) is opened on the upper side wall of the cover (14) of the seed filling chamber (3), and together with the U-shaped rotary pipe (11) and the rotary seed dropping pipe (17) form a rotary seed dropping area; the seeds in the seed box enter the vertical seed guide pipe (2) through the seed box opening (1), and the lower end of the vertical seed guide pipe (2) is a second seed box (16) inclined downward, the inlet and outlet of the second seed box (16) do not intersect in the vertical projection on the horizontal plane, the plane of the second seed box seed dropping port (10) is vertically connected to the plane of the seed filling port (8) laterally, and the second seed box is The seed dropping port (10) of the box is located below the seed filling port (8) and below the rotary seed dropping port (9); the air outlet (5) and the baffle (4) are on the same plane, the baffle (4) is closely connected to the air suction type electric seeding disk away from the shell, and there is a distance between the upper end of the baffle (4) and the side wall of the cover (14), so as to ensure that the seed suction port of the seeding disk for adsorbing seeds passes through without touching the seeds adsorbed on the seed suction port of the seeding disk; the ventilation pipe (6) is connected to the powerful fan through a pipeline; the seed filling chamber (3) cover (14), the rotary pipe inlet (12), the U-shaped rotary pipe (11), the rotary seed dropping pipe (17), the rotary seed dropping port (9), and the seed filling port (8) form a pneumatic seed disturbance circuit, and the ventilation The gas blown out of the ventilation pipe (6) drives the seeds in the seed filling chamber (3) to circulate back and forth in the pneumatic seed disturbance circuit; the speed of the gas blown out of the ventilation pipe (6) matches the angular speed of the seeding disk, so that the seeds match the linear speed of the seed suction port of the seeding disk; the U-shaped rotary pipe (11) presents a U-shaped structure, the inlet width is gradually smaller than the outlet, the low point of the inlet end of the U-shaped rotary pipe (11) is higher than the low point of the outlet end, and due to the height difference, the seeds have a downward movement tendency under the action of gravity; the rotary seed dropping port (9) is located above the seed dropping port (10) of the second seed box, and under the action of gravity and airflow, the seeds of the rotary seed dropping port (9) enter the seed filling chamber (3) before the seeds of the seed dropping port (10) of the second seed box.

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