An air pressure type high-speed precision seed metering device with seeds arranged on the upper side

Abstract

The application discloses a high-speed precision seed sowing device with air pressure and seed sowing from the upper side, which comprises a first shell, a second shell, a seed sowing disc and a seed sowing pipeline. The seed sowing disc is installed in the space enclosed by the first shell and the second shell, and the first shell and the second shell are arranged on the front and back sides of the seed sowing disc. The seed sowing disc is provided with suction holes arranged in a circumferential array. The first shell is provided with a seed box and a first air inlet. The second shell is provided with a hollow hole. The seed sowing pipeline is connected to the upper side of the first shell and arranged horizontally. An arc-shaped air groove is formed in the first shell, and the seed inlet of the seed sowing pipeline is connected to the upper end of the arc-shaped air groove. The gas entering the first shell from the first air inlet is introduced into the lower end of the arc-shaped air groove. In the application, the position and posture of the seed sowing pipeline are changed, the arc-shaped air groove is arranged, and the flow direction of the gas is rearranged, so that the turbulence in the shell and the seed sowing pipeline is reduced, the stability of the air flow pressure in the seed sowing pipeline is ensured, and the seed sowing interval is accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural seeding technology, in particular to an air pressure type high-speed precision seed metering device with top side seed discharge. BACKGROUND

[0002] Precision seed metering devices are essential components in modern agricultural machinery, playing a crucial role in achieving agricultural modernization and precision planting. By accurately controlling the number and spacing of seeds, it ensures that each plant receives optimal growing conditions, thereby improving yield and quality. Especially in large-scale mechanized seeding operations, precision seed metering technology can significantly reduce seed waste, optimize field management, and improve land utilization, which is of great significance to sustainable agricultural development.

[0003] The applicant's prior application CN117223443A discloses a typical air pressure type seed metering device. This seed metering device introduces airflow from the front and side of the seed metering disc. On the one hand, it causes the seed suction holes of the seed metering disc to generate suction force to pick up seeds. On the other hand, part of the airflow overflows from the seed metering pipe to promote seed discharge. This air pressure type seed metering device adopts a vertical seed metering pipe design. Seeds are affected by multiple factors such as gravity, airflow, and collision with the pipe wall during discharge. Combined with the internal airflow turbulence of the seed metering device, the consistency of the discharge speed of the seeds after being pushed out by the airflow force under the combined factors is poor, which reduces the accuracy of the planting spacing. SUMMARY

[0004] The present application provides an air pressure type high-speed precision seed metering device with top side seed discharge that can improve seed discharge stability and precision.

[0005] Technical solution: To achieve the above-mentioned purpose, the air pressure type high-speed precision seed metering device with top side seed discharge of the present application has a first housing, a second housing, a seed metering disc, and a seed metering pipe. The seed metering disc is installed in the space enclosed by the first housing and the second housing, and the first housing and the second housing are located on the front and back sides of the seed metering disc.

[0006] The seed metering disc has circumferentially arrayed seed suction holes. The first housing has a seed tank and a first air inlet. The second housing has a hollow hole.

[0007] The seed metering pipe is connected to the top side of the first housing and is arranged horizontally.

[0008] The first housing has a circular arc-shaped air groove, and the seed inlet of the seed metering pipe is connected to the upper end of the circular arc-shaped air groove.

[0009] The gas entering the first housing from the first air inlet enters the lower end of the circular arc-shaped air groove.

[0010] When working, the edge of the groove wall of the circular-arc air groove contacts with the seed plate or leaves a small gap, so that the circular-arc air groove and the seed plate enclose a first air inlet at the lower part and an air outlet at the upper part. A part of the air in the air cavity flows out from the suction hole to the back of the seed plate, so that the suction hole covered by the circular-arc air groove generates suction force. Thus, the suction hole can take seeds from the seed box and move the seeds from the lower part to the upper part along the circular-arc air groove to the seed inlet of the seed discharge pipe.

[0011] Further, the seed box is provided with a second air inlet, and the first air inlet is located on an air inlet pipe which is provided with a branch pipe connected to the second air inlet.

[0012] The bottom of the seed box is provided with an inclined partition plate, and a plurality of air holes are arranged on the partition plate. A part of the seeds are accumulated above the partition plate. The air flow from the second air inlet blows upward from the lower side of the partition plate through the air holes, so that the seeds on the partition plate are stirred to facilitate the suction of the seeds by the suction hole.

[0013] Further, the first housing is further provided with an air inlet cavity, the air inlet pipe is connected to the air inlet cavity, and an arc-shaped air door is arranged between the air inlet cavity and the circular-arc air groove. The air door can rotate and adjust the position along the central axis of the air inlet cavity. An adjusting handle is arranged on the first housing and extends out of the first housing. An arc-shaped slot is formed on the first housing for sliding of the adjusting handle. A wind guide cover is fixed in the first housing. The wind guide cover and the air inlet cavity jointly form a wind guide channel for guiding the air flow into the circular-arc air groove. In fact, the air door is arranged between the wind guide cover and the circular-arc air groove. A wind guide plate is arranged in the circular-arc air groove along the air inlet direction of the wind guide cover. The wind guide plate is arranged in an inclined manner, and the distance between the wind guide plate and the seed plate gradually increases along the air inlet direction. Thus, the air flow entering the circular-arc air groove from the wind guide channel can be prevented from blowing the seeds sucked by the suction hole.

[0014] By adopting the structure, the air inlet amount of the circular-arc air groove can be adjusted, so that the suction hole can suck the seeds and the discharge speed of the seeds can be adjusted.

[0015] Further, a seed cleaning mechanism is arranged in the circular-arc air groove.

[0016] Further, the seed cleaning mechanism comprises an arc-shaped sliding strip and a seed cleaning piece fixed on the arc-shaped sliding strip. The seed cleaning piece is in a conical shape. The first housing is provided with a sliding groove for sliding of the arc-shaped sliding strip. The sliding groove is in a circular-arc shape, and the center of the sliding groove is different from the center of the seed plate.

[0017] Further, the second shell is rotatably installed with a roller, the roller is arranged on both sides of the seed sowing disc and is aligned with the seed inlet of the seed sowing pipe; the roller is in contact with the back side of the seed sowing disc. In this way, the roller can block the back side of the suction hole reaching the seed inlet, so that the suction force of the suction hole disappears, and the seed can enter the seed sowing pipe smoothly.

[0018] Further, the seed sowing disc is internally provided with an internal gear part; the first shell is installed with a driving motor, and the output shaft of the driving motor is fixed with a gear engaged with the internal gear part. In this way, the driving motor can drive the seed sowing disc to operate accurately.

[0019] Beneficial effects: The air pressure type high-speed precision seed sower for upper side seed sowing has the following beneficial effects:

[0020] (1) By changing the position and posture of the seed sowing pipe, arranging the circular arc air groove and rearranging the air flow direction, the turbulence in the shell and the seed sowing pipe can be reduced, the stability of the air flow pressure in the seed sowing pipe can be ensured, the seed is pushed out horizontally in the seed sowing pipe, the seed is less affected by the complex factors in the initial stage of seed discharge (such as the vertical seed sowing pipe in the traditional seed sower, the seed is easily affected by the gravity and the pipe wall collision), and the seed can be accurately discharged and the plant spacing consistency can be improved after falling to the land through the pipe connected with the seed outlet of the seed sowing pipe.

[0021] (2) A part of the air flow entering the air inlet pipe from the first air inlet enters the seed box part through the branch pipe, promotes the seed turning in the seed box part, and achieves the purpose of promoting the seed suction of the suction hole. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a first perspective view of the air pressure type high-speed precision seed sower for upper side seed sowing.

[0023] Figure 2 It is a second perspective view of the air pressure type high-speed precision seed sower for upper side seed sowing.

[0024] Figure 3 It is a sectional view of the air pressure type high-speed precision seed sower for upper side seed sowing.

[0025] Figure 4 It is a front view of the first shell in the air pressure type high-speed precision seed sower.

[0026] Figure 5 It is a perspective view of the first shell in the air pressure type high-speed precision seed sower.

[0027] In the figure: 1-first housing; 11-seed tank part; 12-first air inlet; 13-circular arc air groove; 14-air inlet pipe; 15-second air inlet; 16-branch pipe; 17-air inlet cavity; 18-damper; 19-sliding groove; 110- wind deflector; 2-second housing; 21-hollow hole; 3-seed disc; 31-seed suction hole; 32-inner gear part; 4-seed disc pipeline; 5-seed cleaning mechanism; 51-arc-shaped sliding bar; 52-seed cleaning piece; 6-roller; 7-driving motor; 8-gear; 9-baffle; 10-adjusting handle; 20-wind deflector. DETAILED DESCRIPTION

[0028] The application will be further described below in conjunction with the drawings.

[0029] As Figures 1 to 3 shown in the figure, the air pressure type high-speed precision seed metering device for upper side seed metering has a first housing 1, a second housing 2, a seed disc 3, and a seed disc pipeline 4; the seed disc 3 is installed in the space enclosed by the first housing 1 and the second housing 2, and the first housing 1 and the second housing 2 are separately arranged on the front and back sides of the seed disc 3.

[0030] The seed disc 3 has circumferentially arranged seed suction holes 31; the first housing 1 has a seed tank part 11 and a first air inlet 12; the second housing 2 has a hollow hole 21.

[0031] The seed disc pipeline 4 is connected to the upper side of the first housing 1 and is arranged horizontally.

[0032] The first housing 1 has a circular arc air groove 13 formed therein, and the seed inlet of the seed disc pipeline 4 is connected to the upper end of the circular arc air groove 13.

[0033] The gas entering the first housing 1 from the first air inlet 12 enters the lower end of the circular arc air groove 13.

[0034] During operation, the edge of the groove wall of the circular arc air groove 13 is in contact with or has a small gap with the seed disc 3, so that a gas cavity with the first air inlet at the lower end and the air outlet at the upper end is enclosed between the circular arc air groove 13 and the seed disc 3. A part of the gas entering the gas cavity overflows from the seed suction holes 31 to the back of the seed disc 3, so that the seed suction holes 31 covered by the circular arc air groove 13 generate suction force. Thus, the seed suction holes 31 can take seeds from the seed tank part 11 and move the seeds from the lower end to the upper end along the circular arc air groove 13 to the seed inlet of the seed disc pipeline 4. Another part of the gas entering the gas cavity is discharged from the seed disc pipeline 4, which promotes the discharge of the seeds entering the seed disc pipeline 4.

[0035] By changing the position and posture of the seed discharge conduit 4, and by setting the circular-arc air groove 13 and rearranging the air flow direction, the turbulence in the shell and in the seed discharge conduit 4 can be reduced, the stability of the air flow pressure in the seed discharge conduit 4 can be ensured, the seeds are pushed out horizontally in the seed discharge conduit 4, the seeds are less affected by the complex factors in the initial stage of seed discharge (for example, in the traditional seed discharge device, the seed discharge conduit is vertically arranged, the seeds are easily affected by the gravity and the collision with the conduit wall, and other comprehensive factors), and after falling to the land through the pipeline connected to the seed discharge port of the seed discharge conduit 4, the accuracy of the seed discharge interval can be ensured, and the uniformity of the plant spacing can be improved.

[0036] Preferably, the seed tank part 11 is provided with a second air inlet 15, the first air inlet 12 is located on the air inlet pipe 14, and the air inlet pipe 14 is provided with a branch pipe 16 connected to the second air inlet 15. By adopting the above structure, part of the air flow entering the air inlet pipe 14 from the first air inlet 12 enters the seed tank part 11 through the branch pipe 16, promotes the turning of the seeds in the seed tank part 11, and achieves the purpose of promoting the seed suction of the suction holes 31.

[0037] As shown in Figure 4 With Figure 5 As shown, the bottom of the seed tank part 11 is provided with an inclined partition plate 9, the partition plate 9 is provided with a plurality of air holes, a part of the seeds are accumulated above the partition plate 9, and the air flow entering the seed tank part 11 from the second air inlet 15 blows upward from the lower side of the partition plate 9 through the air holes, so that the seeds on the partition plate 9 are turned to promote the adsorption of the seeds by the suction holes 31.

[0038] Preferably, the first shell 1 is further provided with an air inlet cavity 17, the air inlet pipe 14 is connected to the air inlet cavity 17, an arc-shaped air door 18 is arranged between the air inlet cavity 17 and the circular-arc air groove 13, the air door 18 can be rotated and adjusted in position along the central axis of the air inlet cavity 17, an adjusting handle 10 is arranged on the first shell 1 and extends out of the first shell 1, and an arc-shaped slot is formed in the first shell 1 and used for sliding of the adjusting handle 10. A wind guide cover 20 is fixed in the first shell 1, the wind guide cover 20 and the air inlet cavity 17 jointly define a wind guide channel for guiding the air flow into the circular-arc air groove 13. In fact, the air door 18 is arranged between the wind guide cover 20 and the circular-arc air groove 13, and a wind guide plate 110 is arranged in the circular-arc air groove 13 and arranged along the air inlet direction of the wind guide cover 20. The wind guide plate 110 is arranged obliquely, and the distance between the wind guide plate 110 and the seed discharge disc 3 gradually increases along the air inlet direction, so that the air flow entering the circular-arc air groove 13 from the wind guide channel cannot blow the seeds adsorbed by the suction holes 31.

[0039] By adopting the structure, the air inlet amount of the circular-arc air groove 13 can be adjusted, the suction holes 31 can adsorb the seeds, and the ejection speed of the seed discharge can be adjusted.

[0040] As Figure 4 With Figure 5 As shown in the figure, the circular-arc air channel 13 is provided with a seed cleaning mechanism 5. The seed cleaning mechanism 5 comprises an arc-shaped sliding strip 51 and a seed cleaning piece 52 fixed on the arc-shaped sliding strip 51, wherein the seed cleaning piece 52 is conical; the first shell 1 is provided with a sliding groove 19 for the arc-shaped sliding strip 51 to slide, wherein the sliding groove 19 is circular-arc-shaped, and the center of the sliding groove 19 is different from the center of the seed sowing disc 3.

[0041] The second shell 2 is provided with a roller 6 rotatably installed therein, wherein the roller 6 is disposed on the two sides of the seed sowing disc 3 and is aligned with the seed sowing pipe 4, and the roller 6 is in contact with the back side of the seed sowing disc 3. In this way, the roller 6 can seal the back side of the suction hole 31 of the seed sowing disc 3, so that the suction force of the suction hole 31 disappears, and the seed can enter the seed sowing pipe 4 smoothly.

[0042] Preferably, the seed sowing disc 3 is provided with an internal gear portion 32; the first shell 1 is provided with a driving motor 7, and the output shaft of the driving motor 7 is fixed with a gear 8 engaged with the internal gear portion 32. In this way, the driving motor 7 can drive the seed sowing disc 3 to rotate accurately.

[0043] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. An air pressure type high-speed precision seed metering device with seeds arranged on the upper side, comprising a first shell (1), a second shell (2), a seed metering disc (3) and a seed metering duct (4); the seed metering disc (3) is installed in the space enclosed by the first shell (1) and the second shell (2), and the first shell (1) and the second shell (2) are respectively arranged on the front and back sides of the seed metering disc (3); the seed metering disc (3) is provided with seed suction holes (31) arranged in a circumferential array; the first shell (1) is provided with a seed tank (11) and a first air inlet (12); the second shell (2) is provided with a hollow hole (21); characterized in that: the seed metering duct (4) is connected to the upper side of the first shell (1) and arranged horizontally; an arc-shaped air groove (13) is formed in the first shell (1), and the seed inlet of the seed metering duct (4) is connected to the upper end of the arc-shaped air groove (13); the air entering the first shell (1) from the first air inlet (12) enters the lower end of the arc-shaped air groove (13); the seed tank (11) is provided with a second air inlet (15), the first air inlet (12) is arranged on an air inlet pipe (14), and the air inlet pipe (14) is provided with a branch pipe (16) connected to the second air inlet (15); a partition plate (9) is arranged on the bottom of the seed tank (11) and arranged obliquely, the partition plate (9) is provided with a plurality of air holes arranged densely, a part of the seeds are accumulated above the partition plate (9), and the air entering the seed tank (11) from the second air inlet (15) blows upward from the lower side of the partition plate (9) through the air holes, so that the seeds on the partition plate (9) are turned over to promote the seeds to be sucked by the seed suction holes (31); the first shell (1) is further provided with an air inlet cavity (17), the air inlet pipe (14) is connected to the air inlet cavity (17), an arc-shaped air door (18) is arranged between the air inlet cavity (17) and the arc-shaped air groove (13), and the air door (18) can rotate along the central axis of the air inlet cavity (17) to adjust the position; an adjusting handle (10) is arranged on the first shell (1) and extends out of the first shell (1), an arc-shaped slot is formed in the first shell (1) and used for sliding the adjusting handle (10) therein, a wind guide cover (20) is fixed in the first shell (1), the wind guide cover (20) and the air inlet cavity (17) jointly define a wind guide channel for guiding the air flow into the arc-shaped air groove (13), the air door (18) is arranged between the wind guide cover (20) and the arc-shaped air groove (13), and a wind guide plate (110) is arranged in the arc-shaped air groove (13) and arranged along the air inlet direction of the wind guide cover (20), the wind guide plate (110) is arranged obliquely and gradually away from the seed metering disc (3) along the air inlet direction; a roller (6) is rotatably arranged in the second shell (2), the roller (6) and the seed inlet of the seed metering duct (4) are respectively arranged on the two sides of the seed metering disc (3) and aligned front to back, and the roller (6) contacts the back side of the seed metering disc (3). The inner side of the seed sowing disc (3) has an internal gear part (32); a driving motor (7) is installed on the first shell (1), and a gear (8) engaged with the internal gear part (32) is fixed on the output shaft of the driving motor (7).

2. The top delivery pneumatic high-speed precision seed metering device according to claim 1, characterized in that, An arc-shaped air groove (13) is installed in the seed sowing disc (3).

3. The top delivery pneumatic high-speed precision seed metering device according to claim 2, characterized in that, The seed cleaning mechanism (5) comprises an arc-shaped sliding bar (51) and a seed cleaning piece (52) fixed on the arc-shaped sliding bar (51), and the seed cleaning piece (52) is conical; the first shell (1) has a sliding groove (19) for the arc-shaped sliding bar (51) to slide, the sliding groove (19) is arc-shaped, and the center of the sliding groove (19) is eccentric with respect to the center of the seed sowing disc (3).

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