Positive pressure seeding device

Abstract

The utility model provides a positive pressure seeding device which comprises a rack, and a seed tray, a seed box and a seed guide piece are arranged on the rack; the seed disc is rotationally connected with the rack and can rotate around the axis of the seed disc, an opening is formed in one side of the lower portion of the seed box, one side of the seed disc is partially located at the opening and covers the opening, a plurality of seeding holes are formed in one side of the seed disc and distributed in the circumferential direction of the seed disc, and air holes are formed in the bottoms of the seeding holes. When the seed disc rotates, the seeding holes can be driven to be communicated with or separated from the opening; the upper end of the seed guide piece is open and is connected with the seed box; the seed box is also provided with an air inlet which is connected with air supply equipment. According to the utility model, positive pressure is generated in the seed box through the air supply equipment, and when the seed disc rotates to drive the seeding holes to be communicated with the opening of the seed box, seeds enter the seeding holes under the action of the positive pressure, so that the seeding holes can stably adsorb the seeds, and the stability of the seeding quantity is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic seeders, in particular to a positive pressure seeder device. Background Art

[0002] Among pneumatic seeders, the air suction seeder is the most common type. The air suction seeder mainly includes a seed box, a seed tray with seed suction holes, a fan and an air flow system. A part of the seed tray extends into the seed box and divides the seed box into a vacuum chamber and a seed holding area. The fan provides negative pressure to the vacuum chamber, so that the seeds enter the adsorption holes of the seed tray due to the pressure difference; when the seeds are rotated out of the vacuum chamber by the seed tray, the seed tray no longer bears the wind pressure, and the seeds fall into the seed delivery tube due to their own gravity, and then fall into the seed trench. Pneumatic seeding does not damage seeds, has strong versatility, and is suitable for high-speed operations.

[0003] Since the air pressure in the seed box is greatly affected by wind pressure during the seed filling process, when the air pressure in the seed box is low, the air pressure on both sides of the seed tray will easily decrease, and the air suction force will decrease, causing some seeds to be unstable in adsorption, and thus the seeding amount will be unstable. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to avoid the seeding process being affected by wind pressure and improve the stability of the seeding amount.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] The utility model provides a positive pressure sowing device, comprising a frame, on which a seed tray, a seed box and a seed guide are provided; the seed tray is rotatably connected to the frame and can rotate around its own axis, an opening is provided on one side of the lower part of the seed box, one side of the seed tray is partially located at the opening and covers the opening, a plurality of sowing holes are provided on one side of the seed tray, the sowing holes are distributed along the circumference of the seed tray, and air holes are provided at the bottom of the sowing holes, and when the seed tray rotates, the sowing holes can be driven to connect or separate with the opening; the upper end of the seed guide is open and connected with the seed box; the seed box is also provided with an air inlet, and the air inlet is connected with an air supply device.

[0007] The beneficial effects of the utility model are:

[0008] By adopting the utility model, positive pressure is generated in the seed box through the air supply equipment. When the seed disc rotates to connect the seeding hole with the opening of the seed box, the seeds enter the seeding hole under the action of the positive pressure, so that the adsorption of the seeds by the seeding hole is stable, which solves the problem of low upper limit of negative pressure and easy influence by wind pressure, and improves the stability of seeding amount. When the seed disc rotates to separate the seeding hole from the opening of the seed box, the seeding hole loses negative pressure and the seeds fall into the seed guide.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the air holes are connected to the outer peripheral edge of the seed tray or a side of the seed tray away from the opening.

[0011] It is convenient to exhaust the air in the sowing hole when the sowing hole is connected with the opening, and to allow air to enter when the sowing hole is separated from the opening and the seeds fall out, thereby reducing the resistance of the seeds entering and exiting the sowing hole.

[0012] Furthermore, the sowing hole is conical, the small end of the sowing hole is arranged radially outwardly of the seed disc, and the side surface of the large end of the sowing hole is connected to one side of the seed disc.

[0013] The seeds are easily allowed to enter the sowing holes under the action of air flow, and the tapered shape of the sowing holes prevents the seeds from flying out of the air holes, thereby avoiding seed loss.

[0014] Furthermore, the air vent is located at the small end of the sowing hole and is connected to the outer peripheral edge of the seed plate.

[0015] The processing is convenient, and the airflow always flows toward the small end of the sowing hole, which is convenient for bringing seeds into the sowing hole, has good reliability and stable seeding.

[0016] Furthermore, a pre-seeding area is provided at the lower part of the seed box, and a partition is provided at the upper side of the pre-seeding area; the air inlet is connected to the pre-seeding area, and the opening is located at the lower side of the pre-seeding area.

[0017] It is convenient to stabilize the air pressure in the pre-seeding area and reduce the impact of adding materials to the seed box; at the same time, the air pressure in the pre-seeding area is increased, thereby increasing the pressure difference on both sides of the sowing hole and stabilizing the seeding amount.

[0018] Furthermore, the air inlet is connected to an air nozzle, which is located above the seed tray, and an outlet of the air nozzle is arranged downward and toward the side of the seed tray.

[0019] It is convenient to blow off the seeds attached to the side of the seed tray and keep them in the seed box, avoiding the seeds being brought out by the side of the seed tray, and only retaining the seeds in the sowing holes, so that the seeding amount is stable.

[0020] Furthermore, the seed guide is a pipe fitting.

[0021] Since the seeds fall into the seed guide one by one in a regular pattern, they are easily blown away by the wind. The pipe fittings prevent the seeds from being blown away by the wind and ensure that the seeds fall into the seed trench.

[0022] Furthermore, the air supply equipment includes a volute, in which a driven shaft and an input shaft are provided, the driven shaft is transmission-connected to the input shaft, one end of the input shaft extends out of the volute, and an impeller is provided on the driven shaft; an air inlet pipe and an air separator are provided on the volute, the air inlet pipe is connected to the space where the center of the impeller is located, the air separator is connected to the edge of the impeller, and the air separator is connected to the air inlet; the volute is fixed on the frame.

[0023] One end of the input shaft extending out of the volute can be connected to the power output shaft of the seeder's engine to obtain power; the power is transmitted from the input shaft to the driven shaft and the impeller in sequence, so that the impeller generates wind force, and the wind force enters the air inlet of the seed box through the air divider, so as to provide positive pressure for the seed box; the structure is simple, the installation is convenient, and the manufacturing cost is low.

[0024] Furthermore, the air distributor is provided with a plurality of air outlets, and the air outlets are connected to the air inlet through pipes.

[0025] When multiple sowing devices are installed on a seeder, multiple air outlets can provide positive pressure for the seed boxes of the multiple sowing devices at the same time, so as to make full use of the power of the air supply equipment and avoid waste of air flow.

[0026] Furthermore, an air inlet cage is provided at one end of the air inlet pipe away from the volute, and the side wall of the air inlet cage is densely covered with air inlet holes.

[0027] The air inlet cage blocks external debris, preventing it from entering the volute and causing wear on the impeller, and also preventing it from entering the seed box with the airflow and affecting the seeding amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] Figure 2 It is a schematic diagram of the structure of the seed box and seed tray.

[0030] Figure 3 This is a structural diagram of the air supply equipment.

[0031] Figure 4 This is a cross-sectional view of the air supply equipment ( Figure 3 Left view direction).

[0032] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0033] 1-frame; 2-seed tray; 21-seeding hole; 3-seed box; 31-air inlet; 32-pre-seeding area; 33-partition; 34-air nozzle; 4-seed guide; 5-volute; 6-impeller; 7-driven shaft; 8-input shaft; 9-air inlet pipe; 10-air distributor; 11-air outlet; 12-air inlet cage. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] This utility model refers to Figure 1-4 .

[0036] The utility model provides a positive pressure seeding device, including a frame 1, on which a seed tray 2, a seed box 3 and a seed guide 4 are arranged; the seed tray 2 is rotatably connected to the frame 1 and can rotate around its own axis, an opening is arranged on one side of the lower part of the seed box 3, one side of the seed tray 2 is partially located at the opening and covers the opening, a plurality of seeding holes 21 are arranged on one side of the seed tray 2, the seeding holes 21 are distributed along the circumference of the seed tray 2, and air holes are arranged at the bottom of the seeding holes 21, and when the seed tray 2 rotates, the seeding holes 21 can be driven to be connected or separated from the opening; the upper end of the seed guide 4 is open and connected to the seed box 3; the seed box 3 is also provided with an air inlet 31, and the air inlet 31 is connected with an air supply device.

[0037] principle:

[0038] In the installed state, the frame 1 can be a frame of a seed drill, and the driving device on the seed drill is connected to the seed tray 2 to drive the seed tray 2 to rotate. Some seed holes 21 are located at the part of the seed tray 2 that covers the opening of the seed box 3. The seed holes 21 at this part are connected to the opening of the seed box 3 through one side of the seed tray 2. When the seed tray 2 rotates to drive this part away from the opening of the seed box 3, the seed holes 21 at this part are also separated from the opening of the seed box 3; at this time, since the upper end opening of the seed guide 4 is connected to the seed box 3, the seed holes 21 at this part immediately move to the top of the seed guide 4.

[0039] In the working state, the seed disc 2 rotates to drive the sowing hole 21 to perform periodic motion along the circumference. When the sowing hole 21 is connected with the opening of the seed box 3, the air supply device supplies air into the seed box 3, and the seed box 3 is in a positive pressure state. The seeds enter the sowing hole 21 under the action of the positive pressure, and the air in the sowing hole 21 is discharged to the atmosphere through the air vents at the bottom of the sowing hole 21. When the sowing hole 21 is separated from the opening of the seed box 3, the sowing hole 21 loses the positive pressure effect, and the seeds fall out. At the same time, the sowing hole 21 also moves to the top of the seed guide 4, and the seeds fall into the seed guide 4, and then follow the seed guide 4 into the seed groove.

[0040] By adopting the utility model, positive pressure is generated in the seed box 3 through the air supply equipment. When the seed disc 2 rotates to drive the sowing hole 21 to be connected with the opening of the seed box 3, the seeds enter the sowing hole 21 under the action of the positive pressure, so that the adsorption of the seeds by the sowing hole 21 is stable, which solves the problem of low upper limit of negative pressure and easy influence by wind pressure, and improves the stability of seeding amount. When the seed disc 2 rotates to drive the sowing hole 21 to separate from the opening of the seed box 3, the sowing hole 21 loses the negative pressure, and the seeds fall into the seed guide 4.

[0041] Furthermore, the air holes are communicated with the outer peripheral edge of the seed tray 2 or a side of the seed tray 2 away from the opening.

[0042] It is convenient to remove the air in the sowing hole 21 when the sowing hole 21 is connected to the opening, and to allow air to enter when the sowing hole 21 is separated from the opening and seeds fall out, thereby reducing the resistance of seeds entering and exiting the sowing hole 21.

[0043] Furthermore, the sowing hole 21 is conical, the small end of the sowing hole 21 is arranged radially outward of the seed disc 2, and the side surface of the large end of the sowing hole 21 is connected to one side of the seed disc 2.

[0044] The seeds are easily allowed to enter the sowing holes 21 under the action of the air flow, and the tapered shape of the sowing holes 21 prevents the seeds from flying out of the air holes, thereby avoiding seed loss.

[0045] Furthermore, the air vent is located at the small end of the sowing hole 21 and is connected to the outer peripheral edge of the seed tray 2.

[0046] The processing is convenient, and the airflow always flows toward the small end of the sowing hole 21, so it is convenient to bring the seeds into the sowing hole 21, the reliability is good, and the seeding is stable.

[0047] Further, such as Figure 1-2 As shown: a pre-seeding area 32 is also provided at the lower part of the seed box 3 , and a partition 33 is provided at the upper side of the pre-seeding area 32 ; the air inlet 31 is connected to the pre-seeding area 32 , and the opening is located at one side of the lower part of the pre-seeding area 32 .

[0048] This facilitates stabilizing the air pressure in the pre-seeding area 32 and reducing the impact of adding materials to the seed box 3; at the same time, the air pressure in the pre-seeding area 32 is increased, thereby increasing the pressure difference on both sides of the sowing hole 21 and stabilizing the seeding amount.

[0049] Furthermore, the air inlet 31 is connected to an air nozzle 34 , which is located above the seed tray 2 , and an outlet of the air nozzle 34 is arranged downward and toward the side of the seed tray 2 .

[0050] It is convenient to blow off the seeds attached to the side of the seed tray 2 and leave them in the seed box 3, so as to avoid the seeds being taken out of the side of the seed tray 2 and only retain the seeds in the sowing holes 21, so as to stabilize the seeding amount.

[0051] Furthermore, the seed guide 4 is a pipe.

[0052] Since the seeds fall into the seed guide piece 4 one by one in a regular pattern, they are easily blown off by the wind. The pipe piece prevents the seeds from being blown off by the wind, and ensures that the seeds fall into the seed furrow.

[0053] Further, such as Figure 3-4As shown: the air supply equipment includes a volute 5, in which a driven shaft 7 and an input shaft 8 are arranged, the driven shaft 7 is transmission-connected with the input shaft 8, one end of the input shaft 8 extends out of the volute 5, and an impeller 6 is arranged on the driven shaft 7; an air inlet pipe 9 and an air separator 10 are arranged on the volute 5, the air inlet pipe 9 is communicated with the space where the center of the impeller 6 is located, the air separator 10 is communicated with the edge of the impeller 6, and the air separator 10 is connected to the air inlet 31; the volute 5 is fixed on the frame 1.

[0054] Preferably, the driven shaft 7 and the input shaft 8 are connected via a belt drive.

[0055] One end of the input shaft 8 extending out of the volute 5 can be connected to the engine power output shaft of the seed drill to obtain power; the power is transmitted from the input shaft 8 to the driven shaft 7 and the impeller 6 in sequence, so that the impeller 6 generates wind force, and the wind force enters the air inlet 31 of the seed box 3 through the air separator 10, so as to provide positive pressure for the seed box 3; the structure is simple, the installation is convenient, and the manufacturing cost is low.

[0056] Furthermore, the air distributor 10 is provided with a plurality of air outlets 11 , and the air outlets 11 are connected to the air inlet 31 through pipes.

[0057] When multiple sowing devices are arranged on a sowing machine, multiple air outlets 11 can provide positive pressure for the seed boxes 3 of the multiple sowing devices at the same time, so as to fully utilize the power of the air supply equipment and avoid waste of air flow.

[0058] Furthermore, an air inlet cage 12 is provided at one end of the air inlet pipe 9 away from the volute 5 , and the side wall of the air inlet cage 12 is densely covered with air inlet holes.

[0059] The air inlet cage 12 blocks foreign debris, thereby preventing foreign debris from entering the volute 5 and causing wear on the impeller 6, and preventing foreign debris from entering the seed box 3 with the air flow and affecting the seeding amount.

[0060] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as: "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0061] In addition, if there are order description terms, such as "first", "second", etc., their purpose in this specification is to facilitate understanding or simplify description. For example, in order to distinguish multiple technical features of the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present utility model, if the terms describing the relative functional relationship of the structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be a fixed connection, a detachable connection, or an integrated one; can be a mechanical connection or an electrical connection; can be a direct connection or an indirect connection through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements; "fix" can be an integrated fixation or a detachable fixation through fasteners; can be a direct fixation or a fixation through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present utility model can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0063] In the present invention, if there are descriptive terms with subsidiary or connecting meanings, for example, the first feature is "on" or "below" the second feature, unless otherwise clearly specified and limited, it should not be interpreted in a restrictive manner. For example, "on" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0064] Furthermore, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of the different embodiments and examples described in this specification without contradiction, and these combinations or combinations shall all fall within the scope summarized by the utility model.

[0066] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. A person skilled in the art can change, modify, replace and modify the above embodiments within the scope of information available from public channels and in combination with the technical inspiration provided by the present application documents.

Claims

1. A positive pressure sowing device, characterized in that: The invention comprises a frame (1), wherein a seed tray (2), a seed box (3) and a seed guide (4) are provided on the frame (1); the seed tray (2) is rotatably connected to the frame (1) and can rotate around its own axis; an opening is provided on one side of the lower part of the seed box (3); a part of one side of the seed tray (2) is located at the opening and covers the opening; a plurality of sowing holes (21) are provided on one side of the seed tray (2); the sowing holes (21) are distributed along the circumference of the seed tray (2); air holes are provided at the bottom of the sowing holes (21); when the seed tray (2) rotates, the sowing holes (21) can be driven to connect or separate with the opening; the upper end of the seed guide (4) is open and connected to the seed box (3); the seed box (3) is also provided with an air inlet (31), and the air inlet (31) is connected to an air supply device.

2. The positive pressure seeding device according to claim 1, characterized in that: The air vent is communicated with the outer peripheral edge of the seed tray (2) or a side of the seed tray (2) away from the opening.

3. The positive pressure seeding device according to claim 2, characterized in that: The sowing hole (21) is conical, the small end of the sowing hole (21) is arranged radially outward of the seed disc (2), and the side surface of the large end of the sowing hole (21) is connected to one side of the seed disc (2).

4. The positive pressure seeding device according to claim 3, characterized in that: The air vent is located at the small end of the sowing hole (21) and is connected to the outer peripheral edge of the seed plate (2).

5. The positive pressure seeding device according to claim 1, characterized in that: A pre-seeding area (32) is also provided at the lower part of the seed box (3), and a partition (33) is provided at the upper side of the pre-seeding area (32); the air inlet (31) is connected to the pre-seeding area (32), and the opening is located at one side of the lower part of the pre-seeding area (32).

6. The positive pressure seeding device according to claim 5, characterized in that: The air inlet (31) is also connected to an air nozzle (34), which is located above the seed tray (2), and an outlet of the air nozzle (34) is arranged downward and toward the side of the seed tray (2).

7. The positive pressure seeding device according to claim 1, characterized in that: The seed guide (4) is a pipe.

8. The positive pressure seeding device according to claim 1, characterized in that: The air supply device comprises a volute (5), a driven shaft (7) and an input shaft (8) are arranged in the volute (5), the driven shaft (7) is transmission-connected with the input shaft (8), one end of the input shaft (8) extends out of the volute (5), and an impeller (6) is arranged on the driven shaft (7); an air inlet pipe (9) and an air separator (10) are arranged on the volute (5), the air inlet pipe (9) is communicated with the space where the center of the impeller (6) is located, the air separator (10) is communicated with the edge of the impeller (6), and the air separator (10) is connected with the air inlet (31); the volute (5) is fixed on the frame (1).

9. The positive pressure seeding device according to claim 8, characterized in that: The air distributor (10) is provided with a plurality of air outlets (11), and the air outlets (11) are connected to the air inlet (31) through pipelines.

10. The positive pressure seeding device according to claim 8, characterized in that: An air inlet cage (12) is provided at one end of the air inlet pipe (9) away from the volute (5), and the side wall of the air inlet cage (12) is densely covered with air inlet holes.

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