Air pressure type high-speed precision seed sowing device capable of sowing seeds on upper side

Abstract

The invention discloses an air pressure type high-speed precision seed-metering device capable of metering seeds on the upper side. The air pressure type high-speed precision seed-metering device is provided with a first shell, a second shell, a seed-metering disc and a seed-metering pipeline, the seed-metering disc is mounted in a space defined by the first shell and the second shell, and the first shell and the second shell are respectively arranged on the front side and the back side of the seed-metering disc; seed suction holes which are distributed in a circumferential array manner are formed in the seed-metering disc; the first shell is provided with a seed box part and a first air inlet; a hollow hole is formed in the second shell; the seed discharging pipeline is connected with the upper side of the first shell and is transversely arranged; a circular-arc-shaped air groove is formed in the first shell, and a seed inlet of the seed discharging pipeline is connected with the upper end of the circular-arc-shaped air groove; and gas entering the first shell from the first gas inlet is introduced into the lower end of the arc-shaped gas groove. According to the invention, by changing the position and posture of the seed-metering pipeline, arranging the arc-shaped air groove and rearranging the flow direction of the air flow, the turbulent flow in the shell and the seed-metering pipeline is reduced, the stability of the pressure of the air flow in the seed-metering pipeline is ensured, and the accurate discharge interval of seeds is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural sowing, in particular to an upper-side pneumatic high-speed precision seeding device. Background Art

[0002] Precision seeding devices are an indispensable component of modern agricultural machinery and are crucial to achieving agricultural modernization and precision planting. They ensure that each crop can obtain optimal growth conditions by accurately controlling the number and spacing of seeds, thereby improving yield and quality. Especially in large-scale mechanized seeding operations, precision seeding technology can significantly reduce seed waste, optimize field management, and improve land utilization, which is of great significance to promoting sustainable agricultural development.

[0003] The applicant's prior application CN117223443A discloses a typical pneumatic seed metering device, which introduces airflow into the front side of the seeding disk. On the one hand, the suction holes of the seeding disk generate adsorption force to suck up the seeds, and on the other hand, part of the airflow overflows from the seeding tube to promote seed discharge. The pneumatic seed metering device adopts a vertical seeding pipe design. During the discharge process, the seeds are affected by multiple factors such as gravity, airflow, and collision with the pipe wall. Combined with the factor of turbulent airflow inside the seed metering device, the consistency of the discharge speed of the seeds after being pushed out by the airflow thrust under the comprehensive factors is poor, which reduces the accuracy of the planting spacing. Summary of the invention

[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an upper-side pneumatic high-speed precision seeding device that can improve seeding stability and seeding accuracy.

[0005] Technical solution: To achieve the above-mentioned purpose, the pneumatic high-speed precision seeding device for upper seeding of the present invention comprises a first shell, a second shell, a seeding disc and a seeding pipe; the seeding disc is installed in the space enclosed by the first shell and the second shell, and the first shell and the second shell are respectively placed on the front and back sides of the seeding disc;

[0006] The seeding disc is provided with seed suction holes arranged in a circumferential array; the first shell is provided with a seed box portion and a first air inlet; the second shell is provided with a hollow hole;

[0007] The seed discharging pipe is connected to the upper side of the first shell and arranged horizontally;

[0008] An arc-shaped air groove is formed in the first shell, and the seed inlet of the seed discharge pipe is connected to the upper end of the arc-shaped air groove;

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

[0010] During operation, the edge of the groove wall of the arc-shaped air groove is in contact with the seed disc or a small gap is left between the arc-shaped air groove and the seed disc, so that an air cavity with a first air inlet at the bottom and an air outlet at the top is enclosed between the arc-shaped air groove and the seed disc, and a part of the gas entering the air cavity overflows from the seed suction hole to the back of the seed disc, so that the seed suction hole covered by the arc-shaped air groove generates an adsorption force, so that the seed suction hole can take seeds from the seed box and transport the seeds from bottom to top along the arc-shaped air groove to the seed inlet of the seed pipe; another part of the gas entering the air cavity is discharged from the seed pipe, which promotes the discharge of seeds entering the seed pipe.

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

[0012] An inclined partition is installed at the bottom of the seed box, and densely arranged air holes are opened on the partition. A part of the seeds are accumulated on the upper side of the partition. The air flow entering the seed box from the second air inlet is blown upward through the air holes from the lower side of the partition, so that the seeds on the partition are turned over, which promotes the seeds to be adsorbed by the seed suction holes.

[0013] Furthermore, the middle part of the first shell also has an air inlet cavity, the air inlet pipe is connected to the air inlet cavity, an arc-shaped damper is arranged between the air inlet cavity and the arc-shaped air groove, the damper can be rotated along the central axis of the air inlet cavity to adjust the position, an adjustment handle extending out of the first shell is installed on the first shell, and an arc-shaped groove is provided on the first shell for the adjustment handle to slide in. An air guide cover is fixed in the first shell, and the air guide cover and the air inlet cavity together enclose an air guide channel for guiding the airflow into the arc-shaped air groove. In fact, the damper is placed between the air guide cover and the arc-shaped air groove, and an air guide plate arranged along the air inlet direction of the air guide cover is installed in the arc-shaped air groove. The air guide plate is arranged in an inclined manner, and its distance from the seed plate gradually becomes farther along the direction of airflow inlet, so that the airflow entering the arc-shaped air groove from the air guide channel can be prevented from blowing to the seeds that have been adsorbed by the seed suction hole, causing the seeds to be blown off.

[0014] By adopting this structure, the air intake into the arc-shaped air groove can be adjusted, ensuring that the seed suction hole can absorb the seeds while making it possible to adjust the seed ejection speed.

[0015] Furthermore, a seed cleaning mechanism is installed in the arc-shaped air groove.

[0016] Furthermore, the seed clearing mechanism includes an arc-shaped sliding bar and a seed clearing piece fixed on the arc-shaped sliding bar, and the seed clearing piece is conical; the first shell has a sliding groove for the sliding of the arc-shaped sliding bar, and the sliding groove is arc-shaped, and the center of the sliding groove is not concentric with the center of the seed disc.

[0017] Furthermore, a roller is rotatably mounted in the second housing, and the roller and the seed inlet of the seeding pipe are respectively placed on both sides of the seeding disc, and the two are aligned front and back; the roller contacts the back side of the seeding disc. In this way, the roller can block the back side of the seed suction hole reaching the seed inlet, so that the adsorption force of the seed suction hole disappears, and the seeds can smoothly enter the seeding pipe.

[0018] Furthermore, the inner side of the seeding disc has an internal gear part; a driving motor is installed on the first housing, and a gear meshing with the internal gear part is fixed on the output shaft of the driving motor. In this way, the seeding disc can be driven to operate accurately by the driving motor.

[0019] Beneficial effects: The pneumatic high-speed precision seeding device for upper side seeding of the present invention has the following beneficial effects:

[0020] (1) By changing the position and posture of the seeding pipe and setting up arc-shaped air grooves and rearranging the airflow direction, the turbulence in the outer shell and the seeding pipe can be reduced, ensuring the stability of the airflow pressure in the seeding pipe. The seeds are pushed out horizontally in the seeding pipe, reducing the influence of complex factors on the initial stage of seed discharge (such as the vertical placement of the seeding pipe in the traditional seeding device, and the seeds are easily affected by gravity and collision with the pipe wall). The seeds then fall to the ground through the pipeline connected to the seed outlet of the seeding pipe, which can ensure the accurate seed discharge spacing and improve the consistency of plant spacing.

[0021] (2) A portion of the airflow entering the air inlet pipe from the first air inlet enters the seed box portion via the branch pipe, thereby promoting the turning of seeds in the seed box portion, thereby achieving the purpose of promoting the seed suction hole to absorb seeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a first-person structural diagram of the pneumatic high-speed precision seed metering device for upper seeding;

[0023] Figure 2 This is a second perspective structural diagram of the pneumatic high-speed precision seed metering device for upper seed metering;

[0024] Figure 3 It is a cross-sectional structural diagram of a pneumatic high-speed precision seed metering device for upper side seed metering;

[0025] Figure 4 It is a front view of the structure inside the first shell of the pneumatic high-speed precision seed metering device;

[0026] Figure 5 It is a three-dimensional structural diagram of the first shell of the pneumatic high-speed precision seed metering device.

[0027] In the figure: 1-first outer shell; 11-seed box part; 12-first air inlet; 13-arc-shaped air groove; 14-inlet pipe; 15-second air inlet; 16-branch pipe; 17-inlet cavity; 18-air gate; 19-slide; 110-wind guide plate; 2-second outer shell; 21-hollow hole; 3-seed plate; 31-seed suction hole; 32-inner gear part; 4-seed pipe; 5-seed cleaning mechanism; 51-arc-shaped sliding bar; 52-seed cleaning piece; 6-roller; 7-drive motor; 8-gear; 9-partition; 10-adjusting handle; 20-wind guide cover. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] like Figures 1 to 3 The pneumatic high-speed precision seeding device for upper seeding shown in the figure comprises a first housing 1, a second housing 2, a seeding disc 3 and a seeding pipe 4; the seeding disc 3 is installed in a space enclosed by the first housing 1 and the second housing 2, and the first housing 1 and the second housing 2 are respectively placed on the front and back sides of the seeding disc 3;

[0030] The seeding disc 3 has seed suction holes 31 arranged in a circumferential array; the first shell 1 has a seed box portion 11 and a first air inlet 12; the second shell 2 has a hollow hole 21;

[0031] The seed discharging pipe 4 is connected to the upper side of the first housing 1 and arranged horizontally;

[0032] A circular arc-shaped air groove 13 is formed in the first housing 1, and the seed inlet of the seed discharging pipe 4 is connected to the upper end of the circular arc-shaped air groove 13;

[0033] The gas entering the first housing 1 from the first air inlet 12 flows into the lower end of the arc-shaped air groove 13 .

[0034] During operation, the edge of the groove wall of the arc-shaped air groove 13 is in contact with the seed disk 3 or there is a small gap between them, so that an air cavity with a first air inlet at the bottom and an air outlet at the top is enclosed between the arc-shaped air groove 13 and the seed disk 3, and a part of the gas entering the air cavity overflows from the seed suction hole 31 to the back side of the seed disk 3, so that the seed suction hole 31 covered by the arc-shaped air groove 13 generates an adsorption force, so that the seed suction hole 31 can take seeds from the seed box part 11 and move the seeds from bottom to top along the arc-shaped air groove 13 to the seed inlet of the seed pipe 4; another part of the gas entering the air cavity is discharged from the seed pipe 4, which promotes the discharge of seeds entering the seed pipe 4.

[0035] By adopting the above structure, by changing the position and posture of the seeding pipe 4, and by setting the arc-shaped air groove 13 and rearranging the airflow direction, the turbulence in the outer shell and the seeding pipe 4 can be reduced, and the stability of the airflow pressure in the seeding pipe 4 can be ensured. The seeds are pushed out horizontally in the seeding pipe 4, which reduces the influence of complex factors on the initial stage of seed discharge (such as the vertical placement of the seeding pipe in the traditional seeding device, and the seeds are easily affected by the combined factors of gravity and collision with the pipe wall), and then fall to the ground through the pipeline connected to the seed outlet of the seeding pipe 4, which can ensure the accurate discharge spacing of the seeds and improve the consistency of the plant spacing.

[0036] Preferably, the seed box 11 has a second air inlet 15, the first air inlet 12 is located on the air inlet pipe 14, and the air inlet pipe 14 has a branch pipe 16 connected to the second air inlet 15. With the above structure, a part of the airflow entering the air inlet pipe 14 from the first air inlet 12 enters the seed box 11 through the branch pipe 16, which promotes the turning of seeds in the seed box 11, thereby achieving the purpose of promoting the seed suction hole 31 to absorb seeds.

[0037] like Figure 4 and Figure 5 As shown, an inclined partition 9 is installed at the bottom of the seed box part 11, and densely arranged air holes are opened on the partition 9. A part of the seeds are accumulated obliquely above the partition 9. The air flow entering the seed box part 11 from the second air inlet 15 is blown upward through the air holes from the lower side of the partition 9, so that the seeds on the partition 9 are turned over to promote the seeds to be adsorbed by the seed suction holes 31.

[0038] Preferably, the first shell 1 also has an air inlet cavity 17 in the middle, the air inlet pipe 14 is connected to the air inlet cavity 17, an arc-shaped damper 18 is arranged between the air inlet cavity 17 and the arc-shaped air groove 13, and the damper 18 can rotate along the central axis of the air inlet cavity 17 to adjust the position, and an adjustment handle 10 extending out of the first shell 1 is installed on the first shell 1, and an arc-shaped groove is opened on the first shell 1 for the adjustment handle 10 to slide in it. An air guide cover 20 is fixed in the first shell 1, and the air guide cover 20 and the air inlet cavity 17 together enclose an air guide channel for guiding the airflow into the arc-shaped air groove 13. In fact, the air gate 18 is placed between the air guide cover 20 and the arc-shaped air groove 13, and an air guide plate 110 arranged along the air inlet direction of the air guide cover 20 is installed in the arc-shaped air groove 13. The air guide plate 110 is arranged at an angle, and its distance from the seed plate 3 gradually becomes farther along the direction of air flow. In this way, it can prevent the airflow entering the arc-shaped air groove 13 from the air guide channel from blowing onto the seeds that have been adsorbed by the seed suction holes 31, causing the seeds to be blown off.

[0039] With this structure, the air intake into the arc-shaped air groove 13 can be adjusted to ensure that the seed suction hole 31 can absorb the seeds while adjusting the seed ejection speed.

[0040] like Figure 4 and Figure 5 As shown, a seed clearing mechanism 5 is installed in the arc-shaped air groove 13. The seed clearing mechanism 5 includes an arc-shaped sliding bar 51 and a seed clearing member 52 fixed on the arc-shaped sliding bar 51, and the seed clearing member 52 is conical; the first housing 1 has a slide groove 19 for the arc-shaped sliding bar 51 to slide, and the slide groove 19 is arc-shaped, and the center of the slide groove 19 is not concentric with the center of the seed plate 3.

[0041] A roller 6 is rotatably mounted in the second housing 2, and the roller 6 and the seed inlet of the seeding pipe 4 are respectively disposed on both sides of the seeding disc 3, and the two are aligned front and back; the roller 6 contacts the back side of the seeding disc 3. In this way, the roller 6 can block the back side of the seed suction hole 31 reaching the seed inlet, so that the adsorption force of the seed suction hole 31 disappears, and the seeds can smoothly enter the seeding pipe 4.

[0042] Preferably, the inner side of the seeding disc 3 has an internal gear part 32; a driving motor 7 is installed on the first housing 1, and a gear 8 meshing with the internal gear part 32 is fixed on the output shaft of the driving motor 7. In this way, the driving motor 7 can drive the seeding disc 3 to operate accurately.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-speed precision pneumatic seeding device for upper seeding, comprising a first housing (1), a second housing (2), a seeding disc (3) and a seeding pipe (4); the seeding disc (3) is installed in a space enclosed by the first housing (1) and the second housing (2), and the first housing (1) and the second housing (2) are respectively arranged on the front and back sides of the seeding disc (3); The seeding disc (3) is provided with seed suction holes (31) arranged in a circumferential array; the first shell (1) is provided with a seed box portion (11) and a first air inlet (12); and the second shell (2) is provided with a hollow hole (21); Features: The seed discharging pipe (4) is connected to the upper side of the first housing (1) and arranged horizontally; A circular arc-shaped air groove (13) is formed in the first shell (1), and the seed inlet of the seed discharging pipe (4) is connected to the upper end of the circular arc-shaped air groove (13); The gas entering the first housing (1) from the first air inlet (12) passes into the lower end of the arc-shaped air groove (13).

2. The upper side pneumatic high-speed precision seed metering device according to claim 1, characterized in that: The seed box portion (11) is provided with a second air inlet (15), the first air inlet (12) is located 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).

3. The upper side pneumatic high-speed precision seed metering device according to claim 1, characterized in that: The first housing (1) also has an air intake cavity (17) in the middle, the air intake pipe (14) is connected to the air intake cavity (17), and an arc-shaped damper (18) is provided between the air intake cavity (17) and the arc-shaped air groove (13), and the damper (18) can be rotated along the central axis of the air intake cavity (17) to adjust its position.

4. The upper side pneumatic high-speed precision seed metering device according to claim 1, characterized in that: A seed cleaning mechanism (5) is installed in the arc-shaped air groove (13).

5. The upper side pneumatic high-speed precision seed metering device according to claim 4, characterized in that: The seed clearing mechanism (5) comprises an arc-shaped sliding bar (51) and a seed clearing member (52) fixed on the arc-shaped sliding bar (51), wherein the seed clearing member (52) is conical; the first housing (1) comprises a sliding groove (19) for the sliding of the arc-shaped sliding bar (51), wherein the sliding groove (19) is arc-shaped, and the center of the sliding groove (19) is not concentric with the center of the seed plate (3).

6. The upper side pneumatic high-speed precision seed metering device according to claim 1, characterized in that: A roller (6) is rotatably mounted in the second housing (2); the roller (6) and the seed inlet of the seed dispensing pipe (4) are respectively arranged on both sides of the seed dispensing disk (3), and the two are aligned front to back; the roller (6) is in contact with the back side of the seed dispensing disk (3).

7. The upper side pneumatic high-speed precision seed metering device according to claim 1, characterized in that: The inner side of the seeding disc (3) has an internal gear part (32); a driving motor (7) is installed on the first housing (1), and a gear (8) meshing with the internal gear part (32) is fixed on the output shaft of the driving motor (7).

Images