Air suction type seed metering device

Abstract

The utility model relates to the technical field of air suction seed metering, in particular to an air suction type seed metering device which comprises a fixing box, a connecting box is fixedly connected to one side of the fixing box, a screen is fixedly connected to the interior of the connecting box, a plurality of filtering holes are formed in the screen and distributed in a linear array mode in the screen, and the filtering holes are communicated with the connecting box. The top of the connecting box is fixedly communicated with a seed discharging pipe. According to the air-suction type seed metering device, through the structural design that the cavity-divided pneumatic type shell is matched with the seed metering disc, and the aperture ranges of the inner and outer rows of material suction holes are precisely designed and limited; the seed-metering device can be effectively applied to seeds with small and medium particle sizes such as sorghum, mung beans and small red beans and seeds with small particle sizes such as rapeseeds, white rapeseeds and sesames at the same time, so that the whole seed-metering device has good compatibility in precision seeding and even has good universality, and the application range of precision seeding of the seed-metering device is effectively widened.

Description

Technical Field

[0001] This utility model relates to the field of air suction seed metering technology, specifically an air suction seed metering device. Background Technology

[0002] The seed metering device is a key component in agricultural seeding machinery. Its main function is to take seeds out of the seed box according to certain rules and requirements, and to sow them evenly and accurately in the seed furrows or planting holes in the field. Its performance directly affects the sowing quality, including sowing precision, seed distribution uniformity, and the degree of seed damage.

[0003] When seeding, if the seed shape is too irregular, it may not fit well into the seed suction hole, resulting in poor adsorption; if the seed size varies too much, large seeds may block the seed suction hole, while small seeds may not be adsorbed; for seeds with a smooth surface or a waxy layer, the adsorption force may be insufficient, while seeds with a fuzzy surface may affect the formation of negative pressure, thus affecting the accuracy of seeding. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A pneumatic seed metering device includes a fixed box, a seed box, and an air chamber shell. Both the seed box and the air chamber shell are hollow cylinders. A connecting box is fixedly connected to one side of the fixed box, and a screen is fixedly connected inside the connecting box. A seed metering pipe is fixedly connected to the top of the connecting box, and the seed box is fixedly connected to the top of the seed metering pipe. A seed metering disc is fixedly connected to one side of the seed box, and the air chamber shell is fixedly connected to the other side of the seed metering disc. The air chamber shell has a through groove. An inner shell is fixedly connected inside the air chamber shell. A first fan is movably connected inside the inner shell, and a second fan is movably connected inside the inner shell, located at one end of the first fan. A motor is fixedly connected to one end of the internal rotating shafts of both the first and second fans. Several mounting plates are fixedly connected to the side surface of the second fan, and a hole-drilling device is fixedly connected to the top of each mounting plate, located inside the through groove.

[0006] More preferably, the side surface of the air chamber shell is provided with a through groove, which passes through the air chamber shell and the inner shell in sequence.

[0007] In a further preferred embodiment, the fixing box is internally connected to the seed metering pipe, and the seed metering pipe is internally connected to the seed box.

[0008] More preferably, the screen has a plurality of filter holes inside, and the filter holes are arranged in a linear array inside the screen.

[0009] More preferably, the seed metering disc has a plurality of through holes inside, which are arranged in a ring array inside the seed metering disc.

[0010] More preferably, the mounting plates are arranged in a ring array on the side surface of the second fan, and connecting rollers are fixedly connected inside the mounting plates.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] In this invention, the structure of the split-cavity pneumatic shell combined with the seed metering disc, and the precise design and limitation of the diameter range of the inner and outer rows of suction holes, make it effective for both small and medium-sized seeds such as sorghum, mung beans, and red beans, as well as small-sized seeds such as rapeseed, cabbage seeds, and sesame. This not only makes the seed metering device more versatile in precision seeding, but also more universal, effectively improving its applicability in precision seeding.

[0013] In this invention, since the seeds are adsorbed by negative pressure, the number of seeds adsorbed can be effectively controlled, reducing the phenomenon of double sowing and missed sowing. For seeds with irregular shapes and small sizes, more precise sowing can be achieved, and the sowing uniformity is high, which is conducive to the even distribution of seeds in the field and improves the uniformity of crop growth. At the same time, by adjusting the rotation speed of the seed metering disc and the air volume of the fan, the sowing speed and sowing amount can be easily adjusted. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the three-dimensional main structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the planar structure of this utility model.

[0017] Attached Figure Labels: 1. Fixing Box; 2. Connecting Box; 3. Screen; 4. Filter Hole; 5. Seed Metering Pipe; 6. Seed Box; 7. Seed Metering Plate; 8. Through Hole; 9. Air Chamber Shell; 10. Inner Shell; 11. Fan 1; 12. Fan 2; 13. Mounting Plate; 14. Connecting Roller; 15. Hole Drilling Device; 16. Through Groove; 1101. Motor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-2 This utility model provides a technical solution: a pneumatic seed metering device, including a fixed box 1, a connecting box 2 fixedly connected to one side of the fixed box 1, a screen 3 fixedly connected inside the connecting box 2, a plurality of filter holes 4 opened inside the screen 3, the filter holes 4 being arranged in a linear array inside the screen 3, a seed metering pipe 5 fixedly connected to the top of the connecting box 2, a seed box 6 fixedly connected to the top end of the seed metering pipe 5, a seed metering disc 7 fixedly connected to one side of the seed box 6, a plurality of through holes 8 opened inside the seed metering disc 7, the through holes 8 being arranged in a ring array inside the seed metering disc 7, an air chamber shell 9 fixedly connected to the other side of the seed metering disc 7, an inner shell 10 fixedly connected inside the air chamber shell 9, and a through groove 1 opened on the side surface of the air chamber shell 9. 6. The motor 1101 drives the fans 11 and 12 to rotate, thereby creating a negative pressure environment on one side of the seed metering tray 7. The seed metering tray 7 has many through holes 8. When the negative pressure is generated, the air around these through holes 8 is drawn out. The seeds in the seed chamber are adsorbed onto the through holes 8 under the action of air pressure difference. The seed metering tray 7 with seeds adsorbed begins to rotate. When the through holes 8 with seeds rotate to the seed metering position, the negative pressure environment at the through holes 8 is broken, and the seeds are detached from the through holes 8 under their own gravity, thereby realizing seed metering. During the seed metering process, the seeds can enter the connecting box 2 through the seed metering tube 5, and then be filtered through the screen 3 and filter holes 4, thereby completing the seed metering.

[0020] In this embodiment, as Figure 1 and Figure 2 As shown, the through groove 16 passes through the air chamber shell 9 and the inner shell 10 in sequence. Fan 11 is movably connected inside the inner shell 10, and fan 2 12 is movably connected inside the inner shell 10. Fan 2 12 is located at one end of fan 11. A motor 1101 is fixedly connected to one end of the internal rotating shaft of fan 2 12 and fan 11. Several mounting plates 13 are fixedly connected to the side surface of fan 2 12. Through the structural design of the cavity pneumatic shell and the seed metering disc 7, and through the precise design and limitation of the diameter range of the inner and outer rows of suction holes, it can be effectively applied to both small and medium-sized seeds such as sorghum, mung beans, and red beans, as well as small-sized seeds such as rapeseed, cabbage seeds, and sesame. This not only makes the entire seed metering device have good versatility in precision seeding, but also good universality, effectively improving its applicability range for precision seeding.

[0021] In this embodiment, as Figure 1 and Figure 2 As shown, the mounting plates 13 are arranged in a ring array on the side surface of the second fan 12. The connecting rollers 14 are fixedly connected inside the mounting plates 13, and the hole punching device 15 is fixedly connected to the top of the mounting plates 13. The hole punching device 15 is located inside the through groove 16. Since the seeds are adsorbed by negative pressure, the number of seeds adsorbed can be effectively controlled, reducing the phenomenon of double sowing and missed sowing. For seeds with irregular shapes and small sizes, more precise sowing can be achieved, and the sowing uniformity is high. This is conducive to the uniform distribution of seeds in the field and improves the uniformity of crop growth. At the same time, by adjusting the rotation speed of the seed metering disc 7 and the air volume of the fan, the sowing speed and sowing amount can be easily adjusted.

[0022] The method of use and advantages of this utility model: The working process of this air-suction seed metering device is as follows:

[0023] like Figure 1 and Figure 2 As shown, when using this pneumatic de-weighting device, the first step is to rotate the fans 11 and 12 to create a negative pressure environment on one side of the seed metering disc 7. The seed metering disc 7 has many through holes 8. When the negative pressure is generated, the air around these through holes 8 is drawn out, and the seeds in the seed chamber are adsorbed onto the through holes 8 under the pressure difference. The seed metering disc 7, with the seeds adsorbed, begins to rotate. When the through holes 8 carrying the seeds rotate to the seed metering position, the negative pressure environment at the through holes 8 is disrupted, causing the seeds to detach from the through holes 8 under their own weight, thus achieving seed metering. During the seed metering process, the seeds pass through the seed metering pipe 5 into the connecting box 2, and are then filtered through the screen 3 and filter holes 4, completing the seed metering process. This is achieved through the compartmentalized pneumatic housing and the seed metering mechanism. The structural design of the seed metering disc 7, through the precise design and limitation of the diameter range of the inner and outer rows of suction holes, makes it effective for both small and medium-sized seeds such as sorghum, mung beans, and red beans, and small-sized seeds such as rapeseed, cabbage seeds, and sesame. This not only makes the entire seed metering device highly versatile in precision seeding, but also highly universal, effectively improving its applicability range for precision seeding. Because it uses negative pressure to adsorb seeds, it can effectively control the number of seeds adsorbed, reducing double seeding and missed seeding. It can also achieve relatively precise seeding for irregularly shaped and small-sized seeds, with high seeding uniformity, which is conducive to the even distribution of seeds in the field and improves the uniformity of crop growth. At the same time, by adjusting the rotation speed of the seed metering disc 7 and the air volume of the fan, the seeding speed and seeding rate can be easily adjusted.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0025] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A pneumatic seed metering device, comprising a fixed box (1), a seed box (6), and an air chamber shell (9), wherein the seed box (6) and the air chamber shell (9) are both hollow cylinders, characterized in that: A connecting box (2) is fixedly connected to one side of the fixed box (1). A screen (3) is fixedly connected inside the connecting box (2). A seed metering pipe (5) is fixedly connected to the top of the connecting box (2). A seed box (6) is fixedly connected to the top of the seed metering pipe (5). A seed metering tray (7) is fixedly connected to one side of the seed box (6). An air chamber shell (9) is fixedly connected to the other side of the seed metering tray (7). A through groove (16) is provided on the air chamber shell (9). An inner shell (10) is fixedly connected inside the air chamber shell (9). Fan 1 (11) is movably connected inside the inner shell (10), and fan 2 (12) is movably connected inside the inner shell (10). Fan 2 (12) is located at one end of fan 1 (11). Motor (1101) is fixedly connected to one end of the internal rotating shaft of fan 2 (12) and fan 1 (11). Several mounting plates (13) are fixedly connected to the side surface of fan 2 (12). A hole punch (15) is fixedly connected to the top of the mounting plate (13). The hole punch (15) is located inside the through groove (16).

2. The air-suction seed metering device according to claim 1, characterized in that: The side surface of the air chamber shell (9) is provided with a through groove (16), which passes through the air chamber shell (9) and the inner shell (10) in sequence.

3. The air-suction seed metering device according to claim 1, characterized in that: The fixing box (1) is internally connected to the seed metering pipe (5), and the seed metering pipe (5) is internally connected to the seed box (6).

4. The air-suction seed metering device according to claim 1, characterized in that: The screen (3) has a plurality of filter holes (4) inside, and the filter holes (4) are arranged in a linear array inside the screen (3).

5. The air-suction seed metering device according to claim 1, characterized in that: The seed metering disc (7) has several through holes (8) inside, and the through holes (8) are arranged in a ring array inside the seed metering disc (7).

6. The air-suction seed metering device according to claim 1, characterized in that: The mounting plate (13) is arranged in a ring array on the side surface of the second fan (12), and a connecting roller (14) is fixedly connected inside the mounting plate (13).

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