CN103238405A - Air-blowing abnormal seed sowing device - Google Patents

Abstract

The invention discloses an air blowing seed metering device for special-shaped seeds, which is used for sowing irregular seeds. The tube is coaxially sealed with the fixed hollow shaft, and the seed tube rotates in the space formed by the outer seed protection plate and the inner seed cover; After the seeds are taken from the hole in the bag, the seed protection moves to the bottom of the seed tube through the channel composed of the outer seed protection plate and the inner seed protection sleeve, and the positive pressure gas input by the hollow shaft will discharge the seeds in the hole from the hole . The present invention can be used for precision sowing technology of germinated small grain shaped seeds such as rice, and has simpler structure than existing seed metering devices, high seeding efficiency, good reliability, low cost and long service life.

Description

Shaped seed air blowing metering device

technical field

The invention belongs to agricultural seeding machinery, in particular to an air-blown seed metering device suitable for irregularly shaped seeds.

Background technique

Rice direct-seeding technology has been increasingly popularized and developed after the application of herbicides. However, the external factors such as irregular shape and poor fluidity of germinated rice seeds at present, the traditional seed metering device can not carry out normal encapsulation for such irregular seeds. Difficulty in picking and picking seeds often leads to defects such as poor operating stability of the seed metering device, low sowing efficiency, complex structure of the seed metering device, and high cost, which affects the application and promotion of mechanized seeding.

Contents of the invention

Aiming at the needs of the current rice direct seeding technology, the present invention provides a seed metering device with simple structure, convenient processing, reliable operation, suitable for direct seeding of heteromorphic seeds such as germinated rice seeds, and provides a new agricultural machinery equipment for popularizing rice direct seeding technology .

The present invention adopts the following technical solutions to realize: an air-blown seed metering device for special-shaped seeds, including a seed box 10, a seed metering cylinder 1, a hollow shaft 7, an outer seed protection plate 12 and an inner seed protection sleeve 13;

The rotatable seed tube 1 is coaxially sealed with the fixed hollow shaft 7. An outer seed protection plate 12 is fixed on the outer surface of the seed tube 1, and an inner protective plate 12 is coaxially fixed inside the seed tube 1. The seed cover 13, the seed tube 1 rotates in the space formed by the outer seed protection plate 12 and the inner seed protection cover 13;

The top of the outer surface of the seed tube 1 is connected to the bottom of the seed box 10, the seed tube 1 is provided with a hole 3 for taking seeds in the seed box, and the seed cleaning device and the seed tube 1 are arranged in the seed box 10. Circumferential outer surface contact;

The hollow shaft 7 communicates with the positive pressure, and it is provided with an exhaust port 2 to communicate with the inner seed protection cover 13, and the inner seed protection cover 13 bottom is provided with a seed discharge groove 14, and the exhaust port 2, the seed discharge groove 14 and the movement to The hole 3 at the bottom forms a positive pressure seed blowing channel.

The two ends of the inner seed sheath 13 are welded and fixed to the hollow shaft 7 .

The inner seed protection cover 13 and the circumferential inner surface of the seed metering cylinder 1 adopt clearance fit.

The exhaust port 2 on the hollow shaft 7 is arranged downward.

The outer seed protection plate 12 is an arc-shaped plate, which is wrapped and arranged on the outer circumferential surface of the half-side seed tube that moves from top to bottom of the hole. The upper end of the outer seed guard plate 12 is in contact with the seed box 10, and the lower end is close to the seed tube. 1 bottom.

The seed clearing device is a flexible brush 11, which is arranged on the side near the outer seed protection plate 12 in the seed box 10.

The seed tube 1 and the hollow shaft 7 are assembled through the oil seal bearing 4, and the oil seal bearing 4 is axially positioned by the bearing end caps 5 arranged at both ends of the seed tube 1.

The hollow shaft 7 communicates with the fan air inlet 6 .

A drive sprocket 9 is fixed on the seed tube end cover 8 at one end of the seed tube 1 and connected with the drive unit.

From the above, the present invention can be used for the precision technology of germinated small grain shaped seeds such as rice, and has the characteristics of simple structure, high efficiency, good reliability, convenient operation, low cost and long service life.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a front sectional view of an air-blown seed meter for special-shaped seeds involved in the following embodiments.

Fig. 2 is a side sectional view of an air-blown seed meter for special-shaped seeds involved in the following embodiments.

Labels in the figure: 1-seed tube, 2-exhaust port, 3-type hole, 4-oil seal bearing, 5-bearing end cover, 6-fan air inlet, 7-hollow shaft, 8-seed tube end Cover, 9-drive sprocket, 10-kind box, 11-hair brush, 12-outer seed protection plate, 13-inner seed protection cover, 14-discharge seed groove.

Detailed ways

Example

Referring to Fig. 1, the special-shaped seed air-blowing type seed metering device in the figure comprises seed case 10, seed tube 1, hollow shaft 7, outer seed protection plate 12 and inner seed protection cover 13; Seed tube 1 and fixed The hollow shaft 7 is coaxially arranged, and the end covers at both ends are assembled with the hollow shaft 7 through the oil seal bearing 4, and the bearing end caps 5 are arranged at both ends of the seeding cylinder to position the oil seal bearing 4, and the seeding at the right end of the seeding cylinder 1 A driving sprocket 9 is fixedly set on the cylinder end cover 8, and the driving unit drives the seed cylinder to rotate through a chain drive.

Referring to Fig. 2 in conjunction with Fig. 2, the top of the outer surface of the seed tube 1 is connected to the bottom of the seed box 10 and is in close contact with the wall of the seed box to ensure that there is no leakage of the seeds in the seed box 10. The type hole 3 of the seed is fixed with an arc-shaped outer seed protection plate 12 on the circumferential outer surface of the seed metering cylinder 1, and is wrapped and arranged on the outer circumferential surface of the half side of the seed metering cylinder where the type hole moves from top to bottom, and the outer seed protection plate 12 The upper end is in contact with the seed box 10, and the lower end is close to the bottom of the seed tube 1, so as to escort the seeds to the unloading position under the seed tube 1; The two ends of 13 are welded and fixed to the hollow shaft 7, and the outer peripheral surface and the inner peripheral surface of the seed tube 1 adopt a clearance fit, which can reduce the working resistance generated by the seed tube 1 and the outer wall of the inner seed sheath 13 when the seed tube 1 rotates. Guarantee on the other hand that the smooth protection of seeds in the inboard hole 3 to the unloading position of the seed tube below, the seed tube 1 rotates in the annular space formed by the outer seed protection plate 12 and the inner seed protection cover 13. In the seed box 10, a hair brush 11 is provided to contact with the circumferential outer surface of the seed tube 1, and the hair brush 11 plays a role in removing redundant seeds in the hole, so as to avoid damage to the seeds due to scratching. The hairbrush 11 is arranged on the side near the outer seed protection plate 12 in the seed box 10 . The hollow shaft 7 communicates with the air inlet 6 of the fan to introduce the positive pressure airflow, and it is provided with an exhaust port 2 facing downward to communicate with the interior of the inner protective cover 13. The position of the exhaust port 2 is the length of the inner protective cover 13. Within the range, the bottom of the inner seed sheath 13 is provided with a seed unloading groove 14, and the bottom of the hole 3 has a small air port. The diameter of the seed filling port outside the type hole is 5.5 mm, the depth is 6 mm, and the diameter of the small air port is 2.0 mm. mm, the exhaust port 2, the seed discharge groove 14 and the hole 3 moved to the bottom form a positive pressure seed blowing channel.

When working, the gas with a certain pressure is connected to the hollow shaft, the gas enters the inner seed sheath through the exhaust port, and then blows out from the seed unloading groove at the bottom of the inner sheath, and moves to the seed discharge in the way of air blowing The seeds in the hole at the bottom of the cylinder can be effectively unloaded. At the same time, the seed tube is driven by an external drive unit to rotate around the hollow shaft, and rotates to the hole above the seed tube to seed the seeds in the seed box. The seed opening of the hole is set relatively Large, suitable for irregular seeds falling into the hole, clearing the seeds under the action of the built-in brush, completing the seed protection under the protection of the outer seed protection plate and the inner seed protection sleeve, and finally moving to the bottom of the seed metering cylinder, The seeding is completed under the action of the self-weight of the seeds and the positive pressure airflow.

Claims (9)

1. An air-blown seed metering device for special-shaped seeds, characterized in that it includes a seed box (10), a seed metering cylinder (1), a hollow shaft (7), an outer seed guard plate (12) and an inner seed guard ( 13); The rotatable seed tube (1) is coaxially sealed with the fixed hollow shaft (7), and an outer seed protection plate (12) is fixed on the outer surface of the seed tube (1). 1) The inner seed protection sleeve (13) is fixed on the inner coaxial, and the seed metering cylinder (1) rotates in the space formed by the outer seed protection plate (12) and the inner seed protection sleeve (13); The top of the outer surface of the seed tube (1) is connected to the bottom of the seed box (10). The seed tube (1) is provided with a hole (3) for picking the seeds in the box, and the seed box (10) is provided with a There is a seed cleaning device in contact with the circumferential outer surface of the seed tube (1); The hollow shaft (7) is connected to the positive pressure, and an exhaust port (2) is provided on it to communicate with the inner protective cover (13). The bottom of the inner protective cover (13) is provided with a seed discharge groove (14). The mouth (2), the seed unloading groove (14) and the type hole (3) moving to the bottom form a positive pressure seed blowing channel. 2. The air-blown seed metering device for special-shaped seeds according to claim 1, characterized in that: both ends of the inner seed sheath (13) are welded and fixed to the hollow shaft (7). 3. The air-blown seed metering device for special-shaped seeds according to claim 2, characterized in that: the inner seed sheath (13) and the inner circumferential surface of the seed metering cylinder (1) adopt clearance fit. 4. The air-blown seed metering device for special-shaped seeds according to claim 1, characterized in that: the exhaust port (2) on the hollow shaft (7) is set downward. 5. The air-blown seed metering device for special-shaped seeds according to claim 1, characterized in that: the outer seed protection plate (12) is an arc-shaped plate, and the package is arranged on the shape hole and moves from top to bottom The outer peripheral surface of half of the seed tube, the upper end of the outer seed protection plate (12) is in contact with the seed box (10), and the lower end is close to the bottom of the seed tube (1). 6. The air-blown seed metering device for special-shaped seeds according to claim 1, characterized in that: the seed cleaning device is a flexible brush (11), which is set in the seed box (10) close to the outer guard one side of the seed plate (12). 7. The air-blown seed metering device for special-shaped seeds according to claim 1, characterized in that: the seed metering cylinder (1) and the hollow shaft (7) are assembled through an oil-sealed bearing (4), and the oil-sealed bearing (4) Axially positioned by the bearing end caps (5) arranged at both ends of the seed tube (1). 8. The air-blown seed metering device for special-shaped seeds according to any one of claims 1-7, characterized in that: the hollow shaft (7) communicates with the fan air inlet (6). 9. An air-blown seed metering device for special-shaped seeds according to claim 8, characterized in that: a drive sprocket is fixed on the end cover (8) of the seed metering barrel (1) at one end of the seed metering barrel (1) (9) Connect with the drive unit.