Positive-pressure pneumatic seed conveying pipe

Abstract

A positive-pressure pneumatic seed conveying pipe belongs to agricultural machinery. An annular sealing plate and a positive pressure airflow guide plate are sequentially and fixedly arranged on the seed falling hopper, the annular sealing plate and the positive pressure airflow guide plate are inserted into a pipe hole in the upper end part of the seed conveying pipe, so that the seed falling hopper and the seed conveying pipe are fixedly connected into a whole, an annular positive pressure air chamber is arranged between the seed falling hopper and the seed conveying pipe, and a positive pressure airflow input pipe is fixedly arranged outside the seed conveying pipe; a positive-pressure airflow input pipe is communicated with the annular positive-pressure air chamber, a plurality of inclined airflow through holes are uniformly distributed in the positive-pressure airflow guide plate, and the annular positive-pressure air chamber is communicated with a pipe cavity of the seed conveying pipe through the inclined airflow through holes; the pipe is simple and reasonable in structure, low in manufacturing cost, convenient to match and install, high in sowing row spacing qualification rate, good in row spacing consistency, wide in application range and high in generalization degree.

Description

TECHNICAL FIELD

[0001] The utility model belongs to agricultural machinery, mainly relates to a kind of positive pressure pneumatic seed delivery pipe that can be matched for all kinds of seed metering device. BACKGROUND

[0002] At present, the seed is sent to seed furrow opened by seed furrow opener by seed delivery pipe communicated with seed metering device after being discharged on various seeding machines, and seeding operation is completed. Since the seed only relies on the weight of seed to complete downward conveying movement when moving through seed delivery pipe, and irregular collision and friction contact occurs between seed and inner wall of seed delivery pipe, the normal running speed and direction of seed are affected and damaged, and seeding plant spacing qualified rate and operation accuracy are greatly reduced. Especially with the improvement of agricultural planting technology in China, the above existing seed delivery pipe structure cannot meet the use requirements of seeding operation. In recent years, seed delivery pipe using pneumatic auxiliary conveying to complete seed delivery has been researched, but due to the reasons such as complex structure, high manufacturing cost and inconvenient installation, it has not been applied in production operation. Therefore, it is necessary to develop a new structure of seed delivery pipe. SUMMARY

[0003] The utility model aims at the problems existing in the prior art, and combines the actual demand of mechanical seeding operation to develop and design a new structure of positive pressure pneumatic seed delivery pipe, so as to achieve the purposes of simple structure, low manufacturing cost, improving seeding plant spacing qualified rate, reliably ensuring seeding accuracy and consistency.

[0004] The basic design of the utility model is that annular sealing plate and positive pressure airflow guide plate are sequentially sleeved and fixed on the outside of the lower side of seed drop hopper from top to bottom, the annular sealing plate and the positive pressure airflow guide plate are integrally inserted into the pipe hole on the upper end of the seed delivery pipe, the seed drop hopper is fixed on the upper end of the seed delivery pipe, and annular positive pressure air chamber is arranged between the outer side of the seed drop hopper part below the annular sealing plate and above the positive pressure airflow guide plate and the inner wall of the seed delivery pipe. The positive pressure airflow input pipe is fixed on the outer side of the upper end of the seed delivery pipe and inclined downward, the positive pressure airflow input pipe and the annular positive pressure air chamber are in communication, a plurality of inclined airflow through holes are uniformly arranged on the circumferential outer side of the positive pressure airflow guide plate, the inclined airflow through holes communicate the annular positive pressure air chamber with the lumen of the seed delivery pipe, and the positive pressure pneumatic seed delivery pipe is formed.

[0005] The utility model discloses a positive pressure air force seed conveying pipe, which is characterized by the following technical scheme: a ring-shaped sealing plate and a positive pressure airflow guide plate are sequentially and fixedly arranged on the outer side of the lower side of a seed drop bucket; the ring-shaped sealing plate and the positive pressure airflow guide plate are integrally inserted into a pipe hole at the upper end of a seed conveying pipe; the seed drop bucket is fixed on the upper end of the seed conveying pipe; a ring-shaped positive pressure air chamber is arranged between the outer side of the seed drop bucket and the inner wall of the seed conveying pipe below the ring-shaped sealing plate and above the positive pressure airflow guide plate; a positive pressure airflow input pipe is fixed on the outer side of the upper end of the seed conveying pipe and is inclined downward; the positive pressure airflow input pipe is in communication with the ring-shaped positive pressure air chamber; a plurality of inclined airflow through holes are uniformly arranged on the circumferential outer side of the positive pressure airflow guide plate; and the inclined airflow through holes are in communication with the pipe cavity of the seed conveying pipe. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a schematic diagram of the overall structure of the positive pressure air force seed conveying pipe;

[0007] Figure 2 is a schematic diagram of the assembly structure of the seed drop bucket;

[0008] Figure 3 is a schematic diagram of the assembly structure of the seed drop bucket and the positive pressure airflow guide plate;

[0009] Figure 4 is a three-dimensional schematic diagram of Figure 3 .

[0010] EXPLANATION OF REFERENCE NUMBERS IN DRAWINGS:

[0011] 1, seed drop bucket, 2, ring-shaped sealing plate, 3, positive pressure airflow input pipe, 4, positive pressure airflow guide plate, 4-1, inclined airflow through hole, 5, seed conveying pipe, 6, ring-shaped positive pressure air chamber. DETAILED DESCRIPTION

[0012] The utility model discloses a positive pressure air force seed conveying pipe, which is characterized by the following technical scheme: a ring-shaped sealing plate and a positive pressure airflow guide plate are sequentially and fixedly arranged on the outer side of the lower side of a seed drop bucket; the ring-shaped sealing plate and the positive pressure airflow guide plate are integrally inserted into a pipe hole at the upper end of a seed conveying pipe; the seed drop bucket is fixed on the upper end of the seed conveying pipe; a ring-shaped positive pressure air chamber is arranged between the outer side of the seed drop bucket and the inner wall of the seed conveying pipe below the ring-shaped sealing plate and above the positive pressure airflow guide plate; a positive pressure airflow input pipe is fixed on the outer side of the upper end of the seed conveying pipe and is inclined downward; the positive pressure airflow input pipe is in communication with the ring-shaped positive pressure air chamber; a plurality of inclined airflow through holes are uniformly arranged on the circumferential outer side of the positive pressure airflow guide plate; and the inclined airflow through holes are in communication with the pipe cavity of the seed conveying pipe.

[0013] When the device is used, the tube is arranged and installed between the seed sowing device and the seed furrow opener on the seeding machine, and the two devices are connected. The positive pressure gas source is connected with the positive pressure airflow input pipe 3. The positive pressure airflow is sequentially blown into the tube cavity of the seed conveying pipe 5 from the tangent direction through the annular positive pressure air chamber 6 and the inclined airflow through hole 4-1, and a rotating columnar airflow is formed. The columnar airflow not only plays a role in positively and forcibly conveying the seeds which are spaced apart from the seed sowing device and fall into the seed conveying pipe 5 through the seed falling hopper 1, but also forms an air film layer between the seeds and the inner wall of the seed conveying pipe 5, so as to reduce and avoid the collision and friction contact times of the seeds with the inner wall of the seed conveying pipe 5 during the falling process, ensure the normal movement of the front and rear sequence seeds according to the frequency and speed of the seed sowing device, and complete the seeding work.

Claims

1. A positive pressure pneumatic seed tube, characterized by: The ring-shaped sealing plate (2) and the positive pressure airflow guide plate (4) are integrally inserted into the pipe hole on the upper end of the seed delivery pipe (5), the seed dropping hopper (1) is fixed on the upper end of the seed delivery pipe (5) and becomes an integral whole, and a ring-shaped positive pressure air chamber (6) is arranged between the outer side of the part of the seed dropping hopper (1) below the ring-shaped sealing plate (2) and above the positive pressure airflow guide plate (4) and the inner wall of the seed delivery pipe (5), the positive pressure airflow input pipe (3) is fixed on the outer side of the upper end of the seed delivery pipe (5) and is inclined downward, the positive pressure airflow input pipe (3) and the ring-shaped positive pressure air chamber (6) are in communication with each other, a plurality of inclined airflow through holes (4-1) are uniformly arranged on the circumferential outer side of the positive pressure airflow guide plate (4), and the inclined airflow through holes (4-1) communicate the ring-shaped positive pressure air chamber (6) with the pipe cavity of the seed delivery pipe (5).

Images