Positive pressure airflow and horizontal disc combined type rice hole sowing seed sowing device

Abstract

The invention discloses a positive pressure airflow and horizontal disc combined type rice hole sowing seed-metering device, and belongs to agricultural machinery. A seed box is fixedly installed on a seed cavity upper shell, a seed cavity lower shell and a base in a hanging mode, a seed inlet pipe, a top end cover, a positive pressure airflow pipe, a seed box fan-shaped partition plate and a seed cavity partition plate are respectively installed on the seed box, and a fan-shaped air sealing shell, a fan-shaped seed sealing plate, a transparent window plate and a flow guide groove are installed on the seed cavity upper shell. The closed seat, the seed cleaning brush seat, the seed cleaning brush, the guide plate, the fixed seat, the brush shaft and the seed metering brush wheel are arranged in the seed cavity lower shell, the seed cavity lower shell is connected with the base in a relatively rotating manner through the connecting seat, the seed metering disc is connected with the limiting shaft sleeve, the base and the matching disc in a rotating manner, and the driving shaft is fixedly arranged at the lower end part of the seed metering disc through the rotating driving seat; according to the device, the self-weight free falling body of rice seeds and the discharging of the seed discharging brush wheel in a combined mode of mechanical stirring and positive pressure airflow blowing are realized, and the device has the characteristics of good hole sowing and hole forming quality, high operation efficiency and few use faults.

Description

Technical Field

[0001] The present invention belongs to agricultural machinery, and mainly relates to a positive pressure air flow and horizontal disc combined seed metering device for dry direct seeding of rice in hills. Background Art

[0002] The agronomic method of dry direct seeding operation of rice is a traditional rice planting mode, which has been used until now due to many advantages such as simple planting method, saving seedling raising time and seedling raising cost. With the improvement of the scientific and technological level, the dry direct seeding of rice begins to adopt an advanced hill seeding mode. However, due to the deficiencies and defects in the structural design of various existing horizontal disc rice hill seeding metering devices, the seed metering process can only rely on the self-weight of the seeds to complete the seed metering by the way of free fall, and there are technical problems such as slow speed of rice seeds entering the seed holes, long time of the seed metering process, poor hill seeding quality and hole formation performance, which need to be solved. Summary of the Invention

[0003] The purpose of the present invention is to aim at the problems existing in the above-mentioned prior art, and in combination with the needs of the current use of rice hill seeding mechanized operation in Northeast China, to research and design a new structure of positive pressure air flow and horizontal disc combined rice hill seeding metering device, so as to achieve the purpose of accelerating the seed metering speed of rice seeds in the hill seeding operation, improving the hill seeding quality and operation efficiency.

[0004] The object of the present invention is achieved as follows: A seed inlet pipe is fixedly installed on the upper part of the seed box and is interconnected. A top cover is rotatably hinged and installed at the upper end of the seed box. A positive pressure air flow pipe is inserted and fixedly installed on the seed box. Inside the seed box, a seed box sector partition and a seed cavity partition are fixedly installed from top to bottom in sequence. The seed box sector partition and the seed cavity partition are in a supporting connection and cooperation. A through hole is opened on the seed cavity partition; at the lower end of the seed box, a seed cavity upper housing is hung and fixedly installed. Inside the cavity of the seed cavity upper housing, a sector air sealing housing and a sector seed sealing plate are fixedly installed in sequence along the circumferential direction. A transparent window plate is inserted and installed on the side wall of the seed cavity upper housing in a vertically movable manner. A diversion groove is fixedly configured at a position below the through hole of the seed cavity partition on the seed cavity upper housing; at the lower end of the seed cavity upper housing, a seed cavity lower housing is hung and fixedly installed. A closing seat and a seed cleaning brush seat are respectively fixedly installed inside the seed cavity lower housing. A seed cleaning brush is fixedly installed on the seed cleaning brush seat. The closing seat is respectively in a closed cooperation with the sector air sealing housing and the sector seed sealing plate. A diversion plate and a fixing seat are installed on the closing seat. A brush shaft is fixedly installed on the fixing seat. A seed discharging brush wheel is axially and radially positioned and circumferentially rotatably sleeved on the brush shaft; at the lower end of the seed cavity lower housing, a base is hung and fixedly installed through a set of fastening bolts A, a connecting seat, and a set of fastening bolts B. When the set of fastening bolts A is removed, the seed cavity lower housing is rotatably connected to the base through the connecting seat. A sleeve seat is fixedly installed on the closing seat. A limiting shaft sleeve is fixedly installed on the sleeve seat. A mating disc and a seed discharging pipe are respectively fixedly installed on the upper end surface and the lower end surface of the base. The seed discharging disc is respectively in a rotational connection and cooperation with the limiting shaft sleeve, the base, and the mating disc. A rotary drive seat is fixedly installed at the lower end of the central part of the seed discharging disc. A drive shaft is coaxially fixedly installed at the lower end of the rotary drive seat. Thus, a positive pressure air flow and horizontal disc combined type rice hill-drop seed metering device is formed.

[0005] During the seed metering process of the rice seeds relying on their own weight for free fall and being mechanically agitated by the seed discharging brush wheel, the present invention also realizes the forced discharging of the rice seeds in a combined manner of blowing with positive pressure air flow, improves and accelerates the centralized discharging speed of multiple seeds, shortens the seed metering time, and has the characteristics of novel, unique, reasonable structure, good hill-drop forming quality, high operation efficiency, few operation failures, and reliable use, providing technical support for the popularization and application of the rice dry-seeding hill-drop agronomic technology. Description of the Drawings

[0006] Figure 1 is the overall structural schematic diagram of the positive pressure air flow and horizontal disc combined type rice hill-drop seed metering device;

[0007] Figure 2 is Figure 1 the sectional view of

[0008] Figure 3 is Figure 1 the left view of

[0009] Figure 4 is Figure 3 a sectional view of;

[0010] Figure 5 is Figure 1 a bottom view of;

[0011] Figure 6 is Figure 1 a top view of;

[0012] Figure 7 is Figure 2 a sectional view taken along line A-A of;

[0013] Figure 8 is Figure 2 a sectional view taken along line B-B of.

[0014] Component number descriptions in the figure:

[0015] 1. Seed metering tube, 2. Fastening bolt group A, 3. Base, 4. Lower housing of seed cavity, 5. Transparent window plate, 6. Upper housing of seed cavity, 7. Seed box, 8. Positive pressure air flow pipe, 9. Top cover, 10. Seed inlet pipe, 11. Connecting seat, 12. Fastening bolt group B, 13. Driving shaft, 14. Matching disc, 15. Brush shaft, 16. Seed metering brush wheel, 17. Fixed seat, 18. Sealing seat, 19. Sector airtight housing, 20. Seed cavity partition, 20-1. Through hole, 21. Sector seed sealing plate, 22. Seed cleaning brush, 23. Seed cleaning brush seat, 24. Seed metering disc, 25. Sleeve seat, 26. Rotary drive seat 27. Limit bush, 28. Sector partition of seed box, 29. Flow guiding groove, 30. Flow guiding plate. Detailed implementation manners

[0016] The implementation scheme of the present invention will be described in detail below with reference to the accompanying drawings. A positive pressure air flow and horizontal disc combined rice hill-drop seeder, a seed inlet pipe 10 is fixedly installed and communicated with each other above the seed box 7. A top cover 9 is rotatably hinged and installed at the upper end of the seed box 7. A positive pressure air flow pipe 8 is inserted and fixedly installed on the seed box 7. A seed box sector partition 28 and a seed cavity partition 20 are fixedly installed in the seed box 7 from top to bottom in sequence. The seed box sector partition 28 and the seed cavity partition 20 are supported and connected in cooperation. A through hole 20-1 is opened on the seed cavity partition 20. A seed cavity upper shell 6 is fixedly installed by hanging at the lower end of the seed box 7. A sector airtight shell 19 and a sector seed closing plate 21 are fixedly installed in the cavity of the seed cavity upper shell 6 in the circumferential direction in sequence. A transparent window plate 5 is inserted and installed on the side wall of the seed cavity upper shell 6 in a vertically movable manner. A diversion groove 29 is fixedly matched at the position below the through hole 20-1 of the seed cavity partition 20 on the seed cavity upper shell 6. A seed cavity lower shell 4 is fixedly installed by hanging at the lower end of the seed cavity upper shell 6. A closing seat 18 and a seed cleaning brush seat 23 are respectively fixedly installed inside the seed cavity lower shell 4. A seed cleaning brush 22 is fixedly installed on the seed cleaning brush seat 23. The closing seat 18 is respectively in sealing cooperation with the sector airtight shell 19 and the sector seed closing plate 21. A diversion plate 30 and a fixing seat 17 are installed on the closing seat 18. A brush shaft 15 is fixedly installed on the fixing seat 17. A seed discharging brush wheel 16 is axially and radially positioned and circumferentially rotatably sleeved on the brush shaft 15. A base 3 is fixedly installed by hanging through a fastening bolt group A2, a connecting seat 11 and a fastening bolt group B12 at the lower end of the seed cavity lower shell 4. When the fastening bolt group A2 is removed, the seed cavity lower shell 4 is rotatably connected with the base 3 through the connecting seat 11. A sleeve seat 25 is fixedly installed on the closing seat 18. A limit shaft sleeve 27 is fixedly installed on the sleeve seat 25. A matching disc 14 and a seed discharging pipe 1 are respectively fixedly installed on the upper end surface and the lower end surface of the base 3. The seed discharging disc 24 is respectively in rotational connection and cooperation with the limit shaft sleeve 27, the base 3 and the matching disc 14. A rotary drive seat 26 is fixedly installed at the lower end of the center part of the seed discharging disc 24. A drive shaft 13 is coaxially fixedly installed at the lower end of the rotary drive seat 26.

[0017] During operation, rice seeds are filled from the seed inlet pipe 10 into the seed box 7. Under the partition action of the fan-shaped partition plate 28 in the seed box, after the rice seeds are accumulated within a certain range on the seed cavity partition plate 20, they enter the upper shell 6 of the seed cavity through the through hole 20-1. Under the combined action of the diversion groove 29 and the diversion plate 30, and restricted by the fan-shaped seed closing plate 21, the rice seeds enter a specific area of the lower shell 4 of the seed cavity in a certain posture. The drive shaft 13 driven to rotate by the external driving force drives the seed discharging disc 24 to rotate through the rotary driving seat 26. The rice seeds in the specific area in the lower shell 4 of the seed cavity fall into the mold holes filled in the seed discharging disc 24 and rotate synchronously with the seed discharging disc 24. While the cleaning brush 22 completes the removal of the redundant seeds in the mold holes of the seed discharging disc 24, the positive pressure air flow input from the positive pressure air flow pipe 8 enters the fan-shaped airtight shell 19 to form a positive pressure air cavity. Under the combined action of the seed discharging brush wheel 16 and the positive pressure air flow, the rice seeds are sent into the seed discharging pipe 1, completing the hole sowing and multi-grain seed forming and conveying.

[0018] After the operation is completed, the top cover 9 is opened from the seed box 7 to remove the remaining rice seeds in the seed box 7; the fastening bolt group A2 is removed, the base 3 is rotated, the seed discharging disc 24 and the mating disc 14 are taken off, and the remaining rice seeds in the lower shell 4 of the seed cavity, on the seed discharging disc 24 and the mating disc 14 are removed to prepare for the next sowing.

Claims

1. A positive-pressure airflow and horizontal disk combined rice hill-drop seeder, characterized in that: A seed-filling tube (10) is fixedly installed and interconnected at the upper part of the seed box (7). A top cover (9) is rotatably hinged and installed at the upper end of the seed box (7). A positive-pressure air flow tube (8) is inserted and fixedly installed on the seed box (7). Inside the seed box (7), a seed box sector partition (28) and a seed cavity partition (20) are fixedly installed in sequence from top to bottom. The seed box sector partition (28) and the seed cavity partition (20) are in a supporting connection and cooperation. A through hole (20-1) is opened on the seed cavity partition (20). At the lower end of the seed box (7), a seed cavity upper shell (6) is hung and fixedly installed. Inside the cavity of the seed cavity upper shell (6), a sector air-sealing shell (19) and a sector seed-sealing plate (21) are fixedly installed in sequence along the circumferential direction. A transparent window plate (5) is inserted and installed on the side wall of the seed cavity upper shell (6) so as to be movable up and down. A diversion groove (29) is fixedly configured at the position below the through hole (20-1) of the seed cavity partition (20) on the seed cavity upper shell (6). At the lower end of the seed cavity upper shell (6), a seed cavity lower shell (4) is hung and fixedly installed. A closing seat (18) and a seed-cleaning brush seat (23) are respectively fixedly configured and installed inside the seed cavity lower shell (4). A seed-cleaning brush (22) is fixedly installed on the seed-cleaning brush seat (23). The closing seat (18) is respectively in a closed cooperation with the sector air-sealing shell (19) and the sector seed-sealing plate (21). A diversion plate (30) and a fixing seat (17) are installed on the closing seat (18). A brush shaft (15) is fixedly installed on the fixing seat (17). A seed-discharging brush wheel (16) is axially and radially positioned and circumferentially rotatably sleeved on the brush shaft (15). At the lower end of the seed cavity lower shell (4), a base (3) is hung and fixedly installed through a fastening bolt group A (2), a connecting seat (11), and a fastening bolt group B (12). When the fastening bolt group A (2) is removed, the seed cavity lower shell (4) is rotatably connected to the base (3) through the connecting seat (11). A sleeve seat (25) is fixedly installed on the closing seat (18). A limiting shaft sleeve (27) is fixedly installed on the sleeve seat (25). A mating disc (14) and a seed-discharging tube (1) are respectively fixedly installed on the upper end face and the lower end face of the base (3). A seed-discharging disc (24) is respectively in a rotational connection and cooperation with the limiting shaft sleeve (27), the base (3), and the mating disc (14). A rotary driving seat (26) is fixedly installed at the lower end of the central part of the seed-discharging disc (24). A driving shaft (13) is coaxially fixedly installed at the lower end of the rotary driving seat (26).

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