Pneumatic seed-metering device

Abstract

The utility model relates to the technical field of agricultural seeding instruments, in particular to a pneumatic seed-metering device, which comprises an air inlet chamber shell, a seed-metering hole for seed metering, an air inlet pipe, an air outlet pipe, an air outlet pipe, an air outlet pipe, an air outlet pipe, an air outlet pipe and a control valve, and is characterized in that the surface of the air inlet chamber shell is provided with seed-metering holes used for seed metering, and the air inlet pipe is fixedly communicated with the surface of the air inlet chamber shell; according to the scheme, the air outlet pipe and the air outlet chamber communicating cover are directly communicated with the air outlet chamber shell, and the air outlet chamber shell, the air outlet chamber communicating cover and the air outlet pipe are integrally formed, so that air between the rotating box and the rotating disc can be directly extracted to form negative pressure when air is extracted into the air outlet pipe; compared with a traditional seed-metering device with an air outlet pipe arranged on the air inlet chamber, the seed-metering device has the advantages that a connecting gap between the air outlet pipe and the air outlet chamber is reduced, so that the air tightness of the seed-metering device is improved, and orderly and sequential seed metering is further facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural sowing equipment, in particular to a pneumatic seed metering device. Background Art

[0002] A seed drill is a machine for automated sowing. The seeds are discharged from the discharge port while the drill is moving and then buried through automatic soil filling, thus achieving automated sowing. Compared with traditional manual sowing, it is more efficient and has better sowing effects, so it is widely promoted.

[0003] Some patent documents of seeding machines are disclosed in the prior art. A Chinese patent with application number 201880072799.1 discloses a seeding element for an agricultural precision seeding machine, which includes a seed selection device, which includes a shell and a perforated disc that is caused to rotate in the shell.

[0004] Patent documents of some seeding machines are disclosed in the prior art. A Chinese patent with application number 201880072964.3 discloses a precision pneumatic seeding machine including: at least one seeding unit having a perforated disc selector device for selecting seeds and having relative surfaces that withstand pressure differences; and a seeding pipe associated with the selector device.

[0005] In the above two patents, the air inlet duct and the air outlet duct are both installed on the air inlet chamber, and the air outlet duct is connected to the air outlet chamber by splicing. However, in actual applications, it is found that the splicing installation between the air outlet duct and the air outlet chamber has poor sealing and may cause air leakage. However, the pneumatic seed metering device achieves precise seeding through air pressure, and air leakage problems will greatly affect the seeding accuracy. For this reason, we propose a pneumatic seed metering device. Utility Model Content

[0006] The utility model aims to solve the shortcomings in the prior art and proposes a pneumatic seed metering device.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is: a pneumatic seed metering device, including an air inlet chamber shell, the surface of the air inlet chamber shell is drilled with seeding holes for seeding, and also includes:

[0008] An air intake pipe, the air intake pipe is fixedly connected to the surface of the air intake chamber shell;

[0009] An inlet baffle, the inlet baffle being detachably connected to the left end surface of the air inlet chamber housing by means of screws;

[0010] An air outlet chamber housing, the air outlet chamber housing being detachably connected to an end surface of the air inlet chamber housing away from the inlet baffle by means of screws;

[0011] An air outlet chamber connecting cover, the air outlet chamber connecting cover is fixedly connected to one end surface of the air outlet chamber shell away from the air inlet chamber shell, and the air outlet chamber connecting cover and the air outlet chamber shell are connected, and the end surface of the air outlet chamber connecting cover away from the air outlet chamber shell is removably connected to an inspection sealing plate by screws;

[0012] An air outlet pipe, the air outlet pipe is fixedly connected to the air outlet chamber communication cover;

[0013] A rotating box, the rotating box rotates in the air outlet chamber shell through a bearing, the rotating box and the air outlet chamber shell are connected, and the rotating box is connected to the output end of the driving motor of the seed metering device;

[0014] The turntable is located between the turntable and the air inlet chamber shell, and is tightly attached to an end face of the turntable away from the air outlet chamber shell. A plurality of evenly distributed circular holes are drilled on the surface of the turntable. The turntable is connected to the output end of the driving motor of the seed metering device. The turntable is separated between the air inlet chamber shell and the turntable to form a positive and negative pressure space.

[0015] Preferably, a sealing plate is fixedly connected to the outer shell of the air outlet chamber, and the sealing plate is slidably connected to an end surface of the turntable close to the rotating box to seal one side of the circular hole to complete seeding.

[0016] Preferably, a plurality of evenly distributed reinforcing ribs are fixedly connected to an end surface of the air outlet chamber shell away from the rotating box.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the present solution, since the air outlet pipe and the air outlet chamber connecting cover are directly connected to the air outlet chamber shell, the air outlet chamber shell, the air outlet chamber connecting cover and the air outlet pipe are integrally formed. Therefore, pumping air into the air outlet pipe can directly draw out the air between the rotating box and the rotating disk to form a negative pressure. Compared with the traditional seed metering device in which the air outlet pipe is arranged on the air inlet chamber, the connecting gap between the air outlet pipe and the air outlet chamber is reduced, which is beneficial to improving the air tightness of the seed metering device, and further more conducive to orderly seeding.

[0019] The air inlet chamber of a traditional seed meter is integrally formed by a casting process, so the air inlet pipe and the air outlet pipe can only be set on the air inlet chamber. In this device, the air inlet chamber shell and the air inlet pipe and the air outlet pipe and the air outlet chamber shell are all integrally formed by an injection molding process, so the sealing is better than that of a traditional seed meter with the air outlet pipe set on the air inlet chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of the utility model;

[0021] Figure 2 It is the first three-dimensional exploded view of the utility model;

[0022] Figure 3 It is a second three-dimensional exploded view of the utility model.

[0023] In the figure: 1. Air inlet chamber shell; 2. Air inlet pipe; 3. Seed inlet baffle; 4. Seed discharge hole; 5. Turntable; 6. Round hole; 7. Turnbox; 8. Air outlet chamber shell; 9. Air outlet pipe; 10. Air outlet chamber connecting cover; 11. Maintenance sealing plate; 12. Reinforcing ribs. DETAILED DESCRIPTION

[0024] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0025] like Figure 1-Figure 3 The pneumatic seed metering device shown comprises an air inlet chamber housing 1, a surface of which is provided with seeding holes 4 for seeding, and further comprises:

[0026] An air intake pipe 2, the air intake pipe 2 is fixedly connected to the surface of the air intake chamber housing 1;

[0027] The seed inlet baffle 3 is detachably connected to the left end surface of the air inlet chamber housing 1 by screws;

[0028] The air outlet chamber housing 8 is detachably connected to an end surface of the air inlet chamber housing 1 away from the inlet baffle 3 by screws;

[0029] The air outlet chamber connecting cover 10 is fixedly connected to one end surface of the air outlet chamber housing 8 away from the air inlet chamber housing 1, and the air outlet chamber connecting cover 10 is connected to the air outlet chamber housing 8, and one end surface of the air outlet chamber connecting cover 10 away from the air outlet chamber housing 8 is disassembled and connected with an inspection sealing plate 11 by screws;

[0030] An air outlet pipe 9, the air outlet pipe 9 is fixedly connected to the air outlet chamber communication cover 10;

[0031] The rotating box 7 rotates in the air outlet chamber shell 8 through a bearing, the rotating box 7 is connected to the air outlet chamber shell 8, and the rotating box 7 is connected to the output end of the driving motor of the seed metering device;

[0032] The turntable 5 is located between the turntable 7 and the air inlet chamber shell 1, and the turntable 5 is closely attached to one end surface of the turntable 7 away from the air outlet chamber shell 8. A plurality of evenly distributed circular holes 6 are drilled on the surface of the turntable 5. The turntable 5 is connected to the output end of the driving motor of the seed metering device. The turntable 5 is separated between the air inlet chamber shell 1 and the turntable 7 to form a positive and negative pressure space.

[0033] A blocking plate is fixedly connected inside the air outlet chamber shell 8, and the blocking plate is slidably connected to one end surface of the turntable 5 close to the turn box 7 to block one side of the circular hole 6 to complete seeding.

[0034] During operation, when the device is used, the air outlet pump is connected to the air inlet pipe 2 to blow air into the air inlet pipe 2, and the air suction pump is connected to the air outlet pipe 9 to extract the air in the air outlet pipe 9, thereby forming a positive pressure in the chamber between the turntable 5 and the air inlet chamber shell 1, and a negative pressure in the chamber between the turntable 5 and the rotating box 7. The rotating box 7 and the turntable 5 are driven by the driving motor to rotate to adsorb and push the seeds onto each circular hole 6. With the rotation of the turntable 5 and the cooperation of the sealing plate, the seeds are sequentially dropped from the seeding holes 4, thereby completing the seeding work;

[0035] In this solution, since the air outlet pipe 9 and the air outlet chamber connecting cover 10 are directly connected to the air outlet chamber shell 8, the air outlet chamber shell 8, the air outlet chamber connecting cover 10 and the air outlet pipe 9 are integrally formed, so the air drawn into the air outlet pipe 9 can directly draw out the air between the rotating box 7 and the rotating disk 5 to form a negative pressure. Compared with the traditional seed metering device in which the air outlet pipe is arranged on the air inlet chamber, the connection gap between the air outlet pipe and the air outlet chamber is reduced, which is beneficial to improve the air tightness of the seed metering device, and further more beneficial to orderly seeding.

[0036] The air inlet chamber of the conventional seed metering device is integrally formed by a casting process, so the air inlet pipe and the air outlet pipe can only be arranged on the air inlet chamber. In the present device, the air inlet chamber housing 1 and the air inlet pipe 2 and the air outlet pipe 9 and the air outlet chamber housing 8 are integrally formed by a pressure injection process, so the sealing performance is better than that of the conventional seed metering device in which the air outlet pipe is arranged on the air inlet chamber.

[0037] It is worth mentioning that the specific working principle of the blocking plate in this solution, the adsorption and extrusion of seeds on the turntable 5 when the seeder is working, and the specific working principle of seed dropping are all disclosed in the comparative documents, so they will not be elaborated here.

[0038] Specifically, a plurality of evenly distributed reinforcing ribs 12 are fixedly connected to an end surface of the air outlet chamber shell 8 away from the rotating box 7 .

[0039] During operation, the plurality of reinforcing ribs 12 can be provided to increase the bending strength of the air outlet chamber housing 8 , making the air outlet chamber housing 8 more durable and less prone to bending or impact damage.

[0040] Working principle of this utility model:

[0041] When using this device, the air outlet pump is connected to the air inlet pipe 2 to blow air into the air inlet pipe 2, and the air suction pump is connected to the air outlet pipe 9 to extract the air in the air outlet pipe 9, thereby forming a positive pressure in the chamber between the turntable 5 and the air inlet chamber shell 1, and a negative pressure in the chamber between the turntable 5 and the turn box 7. The drive motor drives the turn box 7 and the turntable 5 to rotate to adsorb and push the seeds onto each circular hole 6. With the rotation of the turntable 5 and the cooperation of the sealing plate, the seeds are dropped from the seeding holes 4 in an orderly manner, thereby completing the seeding work.

[0042] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and the specification only describe the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. Pneumatic seed metering device, characterized in that: The invention comprises an air intake chamber shell (1), a surface of which is provided with seeding holes (4) for seeding, and further comprises: An air intake pipe (2), the air intake pipe (2) being fixedly connected to a surface of the air intake chamber housing (1); An inlet baffle (3), the inlet baffle (3) being detachably connected to the left end surface of the air inlet chamber housing (1) by means of screws; An air outlet chamber housing (8), the air outlet chamber housing (8) being detachably connected to an end surface of the air inlet chamber housing (1) away from the inlet baffle (3) by means of screws; An air outlet chamber connecting cover (10), the air outlet chamber connecting cover (10) being fixedly connected to an end surface of the air outlet chamber housing (8) away from the air inlet chamber housing (1), and the air outlet chamber connecting cover (10) and the air outlet chamber housing (8) are in communication, and an end surface of the air outlet chamber connecting cover (10) away from the air outlet chamber housing (8) is detachably connected to an inspection sealing plate (11) via screws; An air outlet pipe (9), the air outlet pipe (9) being fixedly connected to the air outlet chamber connecting cover (10); A rotating box (7), the rotating box (7) being rotatable in an air outlet chamber housing (8) via a bearing, the rotating box (7) being connected to the air outlet chamber housing (8), and the rotating box (7) being connected to an output end of a driving motor of the seed metering device; A turntable (5), the turntable (5) being located between a turntable (7) and an air inlet chamber housing (1), and the turntable (5) being closely attached to an end surface of the turntable (7) away from an air outlet chamber housing (8), a plurality of evenly distributed circular holes (6) being bored on the surface of the turntable (5), the turntable (5) being connected to an output end of a driving motor of a seed metering device, and the turntable (5) being separated between the air inlet chamber housing (1) and the turntable (7) to realize the formation of a positive and negative pressure space.

2. The pneumatic seed metering device according to claim 1, characterized in that: A blocking plate is fixedly connected to the air outlet chamber housing (8), and the blocking plate is slidably connected to an end surface of the rotating disk (5) close to the rotating box (7) to block one side of the circular hole (6) to complete seeding.

3. The pneumatic seed metering device according to claim 1, characterized in that: A plurality of evenly distributed reinforcing ribs (12) are fixedly connected to an end surface of the air outlet chamber housing (8) away from the rotating box (7).

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