Groove wheel type air pressure balancing device and air flow conveying seeder with the same

Abstract

A groove wheel type air pressure balance device and an air flow conveying seeder having the device, the air flow conveying seeder comprising a plurality of seed delivery tubes and a groove wheel type air pressure balance device, a plurality of the groove wheel type air pressure balance devices are arranged corresponding to the plurality of seed delivery tubes, each of the seed delivery tubes is connected to a seed inlet of each of the groove wheel type air pressure balance devices in a one-to-one correspondence, and the seed delivery tubes at the upper end of each of the seed inlets are of the same length. The groove wheel type air pressure balance device comprises: a shell, the shell is provided with a seed inlet and a seed outlet; an end cover, mounted on the shell, and together with the shell, encloses a containing space; a rotating shaft, the two ends of which are respectively mounted on the shell and the end cover; and a groove wheel, located in the containing space, and supported and mounted on the rotating shaft, the groove wheel having a plurality of teeth and grooves evenly distributed in the circumferential direction, and the two ends of the groove wheel are respectively provided with side plates, and the side plates are provided with a plurality of first ventilation slots.

Description

Technical Field

[0001] The invention relates to an agricultural sowing machine, in particular to an air flow conveying type sowing machine and a groove wheel type air pressure balancing device thereof. Background Art

[0002] With the acceleration of urbanization in my country, intensive and large-scale land management, large-scale and wide-width agricultural machinery has become the development direction. In the agricultural sowing process, air flow seeders are the inevitable trend of large-scale seeders. The various components of the air flow system are key factors affecting the seeding performance of the seeder. In the document "Design and Experiment of Pneumatic Collective Rice Seeder", Dai Yizheng and others found that the length of the seed delivery tube in the air flow delivery method can affect the seeding effect of the seeder. After experimental analysis, the different lengths of the seed delivery tubes lead to different air pressures in the seed delivery tubes of each row, thereby affecting the air flow rate and causing inconsistent displacement in each row. So far, no relevant reports have been found to explain how to solve this problem. Some existing air flow seeders abroad adopt the method of consistent tube length to ensure the consistency of displacement in each row, but this is bound to increase the energy consumption of the fan and increase costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a groove wheel type air pressure balance device and an air flow conveying seeder with the device, so as to improve the problem of poor consistency of discharge volume in each row caused by different lengths of seed delivery pipes.

[0004] In order to achieve the above object, the present invention provides a sheave type air pressure balancing device, which includes:

[0005] A shell body, wherein a seed inlet and a seed outlet are provided on the shell body;

[0006] An end cover, mounted on the shell, and enclosing an accommodation space together with the shell;

[0007] A rotating shaft, with two ends mounted on the housing and the end cover respectively; and

[0008] The groove wheel is located in the accommodating space and supported and installed on the rotating shaft. The groove wheel has a plurality of teeth and grooves evenly distributed in the circumferential direction, and side plates are respectively arranged at both ends of the groove wheel, and a plurality of first ventilation slots are arranged on the side plates.

[0009] In the above-mentioned groove wheel type air pressure balancing device, the seed inlet is arranged at the upper end of the shell, and there is an angle between the axis of the seed inlet and the horizontal direction.

[0010] In the above-mentioned groove wheel type air pressure balancing device, the seed outlet is arranged at the lower end of the shell, and the axis of the seed outlet is perpendicular to the ground.

[0011] In the above-mentioned grooved wheel type air pressure balancing device, the shell is a cylindrical structure, including a bottom surface and a circumferential surface arranged along the edge of the bottom surface, the bottom surface is provided with a second ventilation slot hole, and the circumferential surface is provided with a third ventilation slot hole.

[0012] In the above-mentioned grooved wheel type air pressure balancing device, a fourth ventilation slot hole is provided on the end cover, and the fourth ventilation slot hole corresponds to the second ventilation slot hole one by one.

[0013] In the above-mentioned grooved wheel type air pressure balancing device, the third ventilation slot hole is located above the horizontal plane where the axis of the shell is located.

[0014] The above-mentioned groove wheel type air pressure balancing device, wherein the first ventilation slot hole includes a plurality of first arc holes arranged in parallel with the axis of the groove wheel as the center of the circle, and the second ventilation slot hole includes a plurality of second arc holes arranged in parallel with the axis of the shell as the center of the circle, and the curvature α of the second arc hole is greater than the curvature β of the first arc hole.

[0015] In the above-mentioned groove wheel type air pressure balancing device, the groove widths of the first ventilation slot hole, the second ventilation slot hole, the third ventilation slot hole and the fourth ventilation slot hole are all smaller than the minimum projection size of the seeds to be discharged.

[0016] In the above-mentioned groove wheel type air pressure balancing device, the size difference H between the inner diameter radius R2 of the shell and the radius R1 of the groove wheel is greater than the maximum size of the seeds to be discharged.

[0017] In order to better achieve the above-mentioned purpose, the present invention also provides an air flow conveying seeder, comprising a plurality of seed delivery tubes and a seeding device connected to the plurality of seed delivery tubes, wherein the seeding device is the above-mentioned groove wheel type air pressure balance device, and a plurality of the groove wheel type air pressure balance devices are arranged corresponding to the plurality of seed delivery tubes, each of the seed delivery tubes is connected one-to-one with the seed inlet of each of the groove wheel type air pressure balance devices, and the seed delivery tubes at the upper end of each of the seed inlets have the same length.

[0018] The technical effects of the present invention are:

[0019] When the seed delivery tubes of the air flow seeder are of different lengths, the fan provides power to simultaneously realize the seed discharge and air pressure balancing functions, ensuring that the discharge volume of each row of seed delivery tubes of different lengths is consistent, improving the seeding quality of the air flow seeder, with a simple structure and easy operation.

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the three-dimensional structure of a sheave type air pressure balancing device according to one embodiment of the present invention;

[0022] Figure 2 A schematic diagram of a three-dimensional structure of a sheave according to an embodiment of the present invention;

[0023] Figure 3 A rear view of a housing according to an embodiment of the present invention;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the end cover according to one embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of the assembly of the sheave and the housing according to one embodiment of the present invention;

[0026] Figure 6 This is an axonometric view of a shell according to an embodiment of the present invention.

[0027] Among them, the reference numerals

[0028] 1 Sheave

[0029] 2 Housing

[0030] 3 End cap

[0031] 4 Rotation axes

[0032] 5 First ventilation slot

[0033] 6 Seed inlet

[0034] 7 Seed outlet

[0035] 8 Bearings

[0036] 9 Side panels

[0037] 10 Second ventilation slot

[0038] 11 Third ventilation slot

[0039] 12 Fourth ventilation slot DETAILED DESCRIPTION

[0040] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0041] The airflow conveying seeder of the present invention comprises a plurality of seed delivery tubes and a seeding device connected to the plurality of seed delivery tubes, the seeding device being a groove wheel type air pressure balancing device, a plurality of the groove wheel type air pressure balancing devices being arranged corresponding to the plurality of seed delivery tubes, each of the seed delivery tubes being connected to a seed inlet 6 of each of the groove wheel type air pressure balancing devices in a one-to-one correspondence, and the seed delivery tubes at the upper end of each of the seed inlets 6 are of the same length. The composition, structure, relative positional relationship, connection relationship and function of the other parts of the airflow conveying seeder are all relatively mature prior arts, so they will not be described here in detail, and only the groove wheel type air pressure balancing device of the present invention will be described in detail below.

[0042] See also Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the three-dimensional structure of a sheave type air pressure balance device according to an embodiment of the present invention. Figure 2 The schematic diagram of the three-dimensional structure of a groove wheel according to an embodiment of the present invention. The groove wheel type air pressure balance device of the present invention comprises: a shell 2, on which a seed inlet 6 and a seed outlet 7 are provided; an end cover 3, which is mounted on the shell 2, and the end cover 3 is in contact with the shell 2 and can be fixedly connected by bolts, and the end cover 3 and the shell 2 together enclose a containing space; a rotating shaft 4, with two ends respectively mounted on the shell 2 and the end cover 3; and a groove wheel 1, which is located in the containing space, that is, located inside the shell 2, and supported and mounted on the rotating shaft 4, and the rotating shaft 4 passes through the groove wheel 1, the end cover 3 and the shell 2, and cooperates with the bearings 8 on the end cover 3 and the shell 2. The groove wheel 1 has a plurality of teeth evenly distributed in the circumferential direction, and side plates 9 are respectively provided at both ends of the groove wheel 1, and a plurality of first ventilation slots 5 are provided on the side plates 9.

[0043] See also Figure 3 , Figure 3It is a rear view of the shell of an embodiment of the present invention. Among them, the seed inlet 6 is arranged at the upper end of the shell 2, and the axis of the seed inlet 6 has an angle with the horizontal direction, that is, the seed inlet 6 maintains a certain angle with the horizontal direction of the shell 2. The seed outlet 7 is arranged at the lower end of the shell 2, and the axis of the seed outlet 7 is perpendicular to the ground. The shell 2 is a cylindrical structure, including a bottom surface and a circumferential surface arranged along the edge of the bottom surface, and the bottom surface is provided with a second ventilation slot 10, and the circumferential surface is provided with a third ventilation slot 11. The third ventilation slot 11 should be as many as possible, but the slot position cannot be lower than the horizontal plane of the axis of the shell 2. That is, the third ventilation slot 11 is located above the horizontal plane where the axis of the shell 2 is located. The first ventilation slot 5 includes a plurality of first arc holes arranged in parallel with the axis of the groove wheel 1 as the center, and the second ventilation slot 10 includes a plurality of second arc holes arranged in parallel with the axis of the shell 2 as the center, and the curvature α of the second arc hole is greater than the curvature β of the first arc hole, so as to facilitate sufficient exhaust flow and better balance the air pressure.

[0044] See also Figure 4 , Figure 4 The end cap of one embodiment of the present invention is a three-dimensional structural diagram. The end cap 3 is provided with a fourth ventilation slot 12, and the fourth ventilation slot 12 corresponds to the second ventilation slot 10. The slot widths of the first ventilation slot 5, the second ventilation slot 10, the third ventilation slot 11 and the fourth ventilation slot 12 are all smaller than the minimum projection size of the seeds to be discharged.

[0045] See also Figure 5 , Figure 5 The schematic diagram of the assembly of the sheave and the housing according to one embodiment of the present invention is shown in FIG. The size difference R2-R1=H between the inner radius R2 of the housing 2 and the radius R1 of the sheave 1 is greater than the maximum size of the seeds to be discharged.

[0046] During operation, the airflow seeder has n rows of seed delivery tubes, and n slotted wheel air pressure balance devices are connected to the seed delivery tubes respectively, and the length of the upper seed delivery tubes is the same. The seed outlet 7 at the lower end of the slotted wheel air pressure balance device is connected to the corresponding seed delivery tube, the fan is started, the slotted wheel 1 rotates, and the seed meter starts to discharge seeds. The seed-airflow two-phase flow enters from the seed inlet 6, and most of the airflow is discharged from the first, second, third and fourth ventilation slots 5, 10, 11 and 12, and the seeds and very little airflow enter the lower seed delivery tube from the seed outlet 7. During operation, ensuring that the length of the upper seed delivery tubes of each row is consistent can ensure that most of the airflow is discharged through the first, second, third and fourth ventilation slots 5, 10, 11 and 12, so that the air pressure in the upper seed delivery tubes of each row is consistent, and the average airflow velocity is the same, thereby ensuring that the amount of seeds fed into the seed delivery tubes is basically the same in the same time, thereby achieving the same seed discharge amount of each row of seed delivery tubes with different lengths, and improving the sowing quality of the airflow seeder.

[0047] The invention can balance the air pressure in seed transport tubes of different lengths and make the air flow speed consistent, thereby ensuring that the amount of seeds entering the seed transport tubes is basically the same, achieving the consistency of seeding amount in each row, ensuring the sowing quality, and saving the energy consumption of the fan. The structure is simple and the operation is convenient.

[0048] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A sheave type air pressure balancing device, characterized in that: include: A shell body, wherein a seed inlet and a seed outlet are provided on the shell body; An end cover, mounted on the shell, and enclosing an accommodation space together with the shell; A rotating shaft, with two ends mounted on the housing and the end cover respectively; and A sheave is located in the accommodating space and supported and mounted on the rotating shaft, the sheave has a plurality of tooth grooves evenly distributed in the circumferential direction, and side plates are respectively provided at both ends of the sheave, and a plurality of first ventilation slots are provided on the side plates; The shell is a cylindrical structure, including a bottom surface and a circumferential surface arranged along the edge of the bottom surface, the bottom surface is provided with a second ventilation slot hole, and the circumferential surface is provided with a third ventilation slot hole; the end cover is provided with a fourth ventilation slot hole, and the fourth ventilation slot hole corresponds to the second ventilation slot hole one by one; the third ventilation slot hole is located above the horizontal plane where the axis of the shell is located; The first ventilation slot includes a plurality of first arc holes arranged in parallel with the axis of the groove wheel as the center, and the second ventilation slot includes a plurality of second arc holes arranged in parallel with the axis of the shell as the center, and the curvature α of the second arc hole is greater than the curvature β of the first arc hole.

2. The sheave type air pressure balancing device according to claim 1, characterized in that: The seed inlet is arranged at the upper end of the shell, and an angle is formed between the axis of the seed inlet and the horizontal direction.

3. The sheave type air pressure balancing device according to claim 1 or 2, characterized in that: The seed outlet is arranged at the lower end of the shell, and the axis of the seed outlet is perpendicular to the ground.

4. The sheave type air pressure balancing device according to claim 1, characterized in that: The slot widths of the first ventilation slot, the second ventilation slot, the third ventilation slot and the fourth ventilation slot are all smaller than the minimum projection size of the seeds to be discharged.

5. The sheave type air pressure balancing device according to claim 1, characterized in that: The size difference H between the inner radius R2 of the shell and the radius R1 of the groove wheel is greater than the maximum size of the seeds to be discharged.

6. An air flow seeder, comprising a plurality of seed delivery tubes and a seed discharge device connected to the plurality of seed delivery tubes, characterized in that: The seed-discharging device is the grooved wheel type air pressure balance device as described in any one of claims 1 to 5, and a plurality of the grooved wheel type air pressure balance devices are arranged corresponding to the plurality of seed delivery pipes, each of the seed delivery pipes is connected one-to-one with the seed inlet of each of the grooved wheel type air pressure balance devices, and the seed delivery pipes at the upper end of each of the seed inlets have the same length.

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