Double-cavity structure type seed supply device and method

Abstract

The invention discloses a double-cavity structure type seed supply device and method.The device comprises a large seed box, a seed double-cavity distribution device, a single seed box and a precise seed sowing device, the seed double-cavity distribution device is fixed to the bottom of the large seed box through a bolt and combined into a whole through a buckle, an outlet of the seed double-cavity distribution device is connected with the single seed box through a ventilation hose, and the seed double-cavity distribution device is connected with the precise seed sowing device; and a lower outlet of the single seed box is connected with a precise seed-metering device. According to the double-cavity seed conveying device, concentrated conveying of seeds can be completed, unnecessary assemblies can be controlled to be closed according to different operation widths, the space can be effectively saved through the double-cavity structure, and the complexity of the whole machine structure is reduced. The automatic start-stop technology can effectively avoid the participation of complex electric control components, simplify the complexity of the whole machine, and realize the high-efficiency and high-speed seeding of large-scale seeding equipment.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery research, and in particular to a dual-cavity seed automatic start-stop conveying system and method. Background Art

[0002] Existing large-scale high-speed seeding systems generally include a seed box, a seed supply device and a precision seed metering device, wherein the seed box is connected to the precision seed metering device through the seed supply device; wherein the seed supply device includes a mechanical seed supply device, an air-conveying seed supply device and an air-suction seed supply device, etc., wherein the air-conveying seed supply device uses high-speed airflow to form pneumatic conveying in the seed transport pipe to achieve fast, low-damage and long-distance seed transportation. For details, please refer to patents CN116649053A, CN211792844U, CN117769935A, CN218499564U, etc.; however, most of the existing air-conveying seed supply devices are single-channel conveying, and the overall sowing efficiency is relatively low. Even if there are multi-channel conveying, the overall structure is relatively complex, and each channel is basically for conveying a single seed, which cannot realize centralized conveying of large-grain seeds; at the same time, it cannot realize automatic start and stop; with the widespread application of large-scale and efficient sowing equipment, it is very necessary to develop an integrated conveying device that can transport large-grain seeds from a large seed box to a small seed box for sowing without power. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a dual-cavity seed automatic start-stop conveying system and method, which can carry out centralized conveying of large-grain seeds, and can quickly adjust the number of devices according to different working widths, thereby improving the operating performance and work efficiency of the machine. In addition, the unpowered dual-cavity structure can effectively save space and reduce the complexity of the overall machine structure; the automatic start-stop technology can effectively avoid the involvement of complex electronic control components, and can simplify the complexity of the entire machine.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions: In the first aspect, an embodiment of the present invention provides a dual-chamber seed automatic start-stop conveying system, comprising a large seed box, a dual-chamber seed distribution device, a single seed box and a precision seed metering device. The dual-chamber seed distribution device is fixed to the bottom of the large seed box by bolts. The dual-chamber seed distribution device comprises two rows of seed chambers arranged in sequence, and an air flow chamber is provided between the two rows of seed chambers along the arrangement direction of the seed chambers. An air inlet is provided at one end of the air flow chamber, and a sealing cover is provided at the other end. An air flow regulating valve is provided on the sealing cover. Each seed chamber is designed with a mixing tube, and the bottom of the mixing tube is connected to the seed chamber and the air flow chamber; the outlet of the mixing tube is connected to the single seed box through a ventilation hose, and the lower outlet of the single seed box is connected to the precision seed metering device.

[0005] As a further technical solution, the seed mixing tube is bent at 90 degrees, and a seed inlet and an air flow inlet are provided at the bottom thereof, and a screen is provided at the position of the air flow inlet.

[0006] As a further technical solution, the front and rear seed chambers and the airflow chamber of the seed dual-chamber distribution device are fastened together by snaps to form a whole.

[0007] As a further technical solution, the seed chambers may be independent of each other or connected.

[0008] As a further technical solution, the top of the side wall of the airflow cavity is two guide plates inclined to the left and right sides, the middle is two straight plates, the lower part is two inclined plates inclined downward, and the end of the lower inclined plate is a guide tube.

[0009] As a further technical solution, an airflow control port is also provided on each of the mixing tubes, and the opening and closing of the airflow control port is controlled by the rotation of another airflow regulating valve.

[0010] As a further technical solution, the single seed box includes a box body, the top of the box body is connected to the seed dual-cavity distribution device through a ventilation hose, an air circulation screen is provided on the box body, and the bottom plate in the single seed box is an inclined bottom plate; a seed outlet is provided at a low position of the inclined bottom plate, and an air circulation screen is provided at its high position; the seed outlet is connected to a vertical pipe to deliver the seeds into the precision seed metering device.

[0011] As a further implementation method, the seed inlet and the seed outlet of the single seed box are distributed diagonally.

[0012] As a further implementation method, the air circulation screen is spaced 2 mm apart. When the individual seed box is full enough, the air circulation screen is covered by seeds and the airflow stops automatically. When the amount of seeds in the individual seed box drops to a sufficient amount, the air circulation screen is exposed, and the airflow starts automatically to be discharged through the air circulation screen and transport the seeds to the individual seed box.

[0013] In a second aspect, an embodiment of the present invention further provides a method for using a dual-chamber seed automatic start-stop delivery system, comprising the following steps: Transport: The fan air enters the dual-chamber seed distribution device through the air inlet. When the airflow control valve is closed, air flows through the bottom outlet of the multi-shell airflow chamber and enters the seed mixing tube. Under the action of negative pressure, the seeds in the seed chamber are drawn into the seed mixing tube, completing the seed-air mixing. The airflow then transports the seeds through the ventilation hose to the individual seed boxes. When the airflow control valve is open, air is discharged directly through the airflow port between the airflow chamber and the seed mixing tube, without any transport effect.

[0014] Storage: Seeds delivered to the individual seed boxes are stored. When the seeds in the individual seed boxes completely cover the air circulation screen, airflow is blocked and seed delivery automatically stops. Under the action of gravity, the seeds stored in the individual seed boxes enter the seed metering device through the vertical seed guide tube from the seed outlet. Under the action of the precision seed metering device, the seeds in the individual seed boxes are gradually consumed. When the amount of seeds in the individual seed boxes drops to a sufficient level, the air circulation screen is exposed again, and airflow automatically begins to circulate. The seeds in the seed dual-chamber distribution device are again delivered to the individual seed boxes until the air circulation screen is covered by seeds and stops. At this time, the seeds in the large seed box also gradually flow into the seed dual-chamber distribution device.

[0015] Seeding: Under negative pressure, the precision seed meter draws in seeds from the individual seed boxes, and the motor drives the seed meter to complete the seeding process. As the precision seed meter operates steadily, seeds from the individual seed boxes continuously enter the precision seed meter, which in turn drives the dual-chamber seed distribution system to continuously deliver seeds. Seeds enter the dual-chamber seed distribution system from the large seed box, where they are transported by airflow into the individual seed boxes for storage. Gravity forces the seeds into the seed meter and discharge them, completing the seeding process.

[0016] Configuration: A dual-chamber seed distribution system can be added or removed based on the number of seeding rows. The system features a primary air inlet at one end and a sealing cover at the other. Adjacent housings are interlocked via side grooves and bosses, and multiple housings are connected using screws.

[0017] The beneficial effects of the above embodiments of the present invention are as follows: (1) The present invention reasonably arranges the positions of the seed chamber, the airflow chamber and the seed mixing tube so that all the seed chambers share one airflow chamber, and the airflow of multiple seed chambers is controlled simultaneously by one airflow chamber. The seed dual-chamber distribution device is a non-powered dual-chamber structure with high space utilization, which reduces the complexity of the whole machine structure and simplifies the overall structure. At the same time, the opening and closing of the airflow in the airflow chamber is controlled by the opening and closing of the airflow regulating valve, which can realize intermittent sowing during the sowing operation, bringing more possibilities for the sowing operation. The airflow size can also be adjusted by the airflow regulating valve, and then the seed delivery amount is adjusted, thereby improving the sowing operation method; the automatic start and stop technology of the airflow can effectively avoid the involvement of complex electronic control components, save costs and reduce the failure rate.

[0018] (2) The individual seed boxes proposed in the present invention are also controlled by an air circulation screen. When the seeds in the individual seed boxes are sufficiently full, the air circulation screen is covered by the seeds and the airflow automatically stops. When the amount of seeds in the individual seed boxes drops to a sufficient level, the air circulation screen is exposed, and the airflow automatically starts to be discharged through the air circulation screen and transports the seeds to the individual seed boxes. The application of the dual-chamber seed automatic start-stop delivery system and method on large-scale sowing equipment greatly improves the operating efficiency of the sowing machine; through centralized distribution of large seed boxes, manual participation is reduced, and efficient and high-speed sowing can be achieved for large-scale sowing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 This is a schematic diagram of a dual-chamber seed automatic start-stop delivery system provided by the present invention; Figure 2 This invention provides a dual-chamber seed automatic start-stop delivery system front view; Figure 3 The present invention provides a schematic diagram of the structure of the seed dual-chamber distribution device; Figure 4 (a), Figure 4 (b) is a cross-sectional view of the dual-chamber seed distribution device provided by the present invention; Figure 5 This is a schematic diagram of the seed delivery process provided by the present invention; Figure 6 This invention provides a schematic diagram of the bottom slope of the monomer box; Figure 7 Is the present invention provides a single box axonometric view; Among them: 1. Large seed box, 2. Dual-chamber seed distribution device, 3. Single seed box, 4. Precision seed metering device, 5. Ventilation hose, 201. Air inlet, 202. Housing, 203. Sealing cover, 204. Airflow regulating valve, 205. Pin, 206. Seed inlet, 207. Seed chamber, 208. Airflow chamber; 2021. Screen, 2022. Mixing tube, 2023. Airflow inlet, 2024. Groove, 2025. Boss; 301. Seed inlet, 302. Seed outlet, 303. Vertical pipe, 304. Air circulation screen, 305. Inclined bottom plate, 306. Seed storage box. DETAILED DESCRIPTION It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations; For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0022] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and so on in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] Example 1: This embodiment provides a dual-chamber seed automatic start-stop delivery system, such as Figure 1 As shown, it includes a large seed box 1, a dual-cavity distribution device 2, a single seed box 3, a precision seed metering device 4, and a ventilation hose 5; the seed dual-cavity distribution device 2 is fixed to the bottom of the large seed box 1 by bolts, and the seed dual-cavity distribution device 2 is combined into one by snaps, and its outlet is connected to the single seed box 3 through a ventilation hose 5, and the lower outlet of the single seed box 3 is connected to the precision seed metering device 4; the seeds stored in the large seed box 1 fill the airflow cavity 208 of the seed dual-cavity distribution device 2 under the action of gravity; the air inlet 201 sends the airflow provided by the fan or other pressurized air source into the airflow cavity 208 of the seed dual-cavity distribution device 2; the seed dual-cavity distribution device 2 in this embodiment is a non-powered dual-cavity structure, and the entire seed supply process is driven by positive pressure airflow.

[0024] As a further implementation method, the seed dual-chamber distribution device 2 includes two rows of seed chambers 207 arranged in sequence, and along the arrangement direction of the seed chambers 207, an air flow chamber 208 is provided between the two rows of seed chambers 207, one end of the air flow chamber 208 is provided with an air inlet 201, and the other end is provided with a sealing cover 203, and an air flow regulating valve 204 is provided on the sealing cover 203. Each seed chamber is inserted with a mixing tube 2022, and the bottom of the mixing tube 2022 is connected to the seed chamber 207 and the air flow chamber 208; the outlet of the mixing tube 2022 is connected to the single seed box 3 through a ventilation hose, and the lower outlet of the single seed box 3 is connected to the precision seed metering device 4.

[0025] The above-mentioned dual-chamber seed automatic start-stop conveying system reasonably sets the positions of the seed chamber 207, the airflow chamber 208 and the mixed seed tube 2022, so that all seed chambers 207 share one airflow chamber 208, and the airflow of multiple seed chambers 207 is controlled simultaneously by one airflow chamber 208. The seed dual-chamber distribution device is a dual-chamber structure with high space utilization, which reduces the complexity of the overall structure and simplifies the overall structure. At the same time, the opening and closing of the airflow conveying in the airflow chamber 208 is controlled by the opening and closing of the airflow regulating valve 204, and row-interrupted sowing can be achieved during sowing operations, which brings more possibilities for sowing operations. The airflow size can also be adjusted by the airflow regulating valve 204, thereby adjusting the seed delivery amount, thereby improving the sowing operation method; the automatic start-stop technology of airflow can effectively avoid the involvement of complex electronic control components, save costs and reduce failure rates.

[0026] Furthermore, the main bodies of the seed chamber 207 and the airflow chamber 208 are mainly made of the shell 202; the air inlet 201 is fixed to one side of the shell 202 by screws, and a sealing cover plate 203 is fixed to the other side of the shell 202; the airflow regulating valve 204 is placed on the sealing cover plate 203 and extends into the interior of the shell 202; Furthermore, the bodies of the seed chamber 207 and the airflow chamber 208 can be integrally formed by injection molding or assembled by splicing. In this embodiment, the seed chamber 207, the airflow chamber 208, etc. are spliced ​​together, and a plurality of shells 202 are combined together to form the seed chamber 207 and the airflow chamber 208. The airflow chamber 208 is located between the left and right symmetrical seed chambers 207. Specifically, as shown in FIG4 (a) and FIG4 (b), the right side of the shell 202 is provided with a groove 2 024, a boss 2025 is provided on the left side, and positioning pins 205 are evenly distributed on both sides; adjacent shells 202 are connected by grooves 2024 and bosses 2025, and are fixed by snap fasteners after being engaged; the grooves 2024 and bosses 2025 are tightly connected to ensure air tightness, and the air flow enters the air flow cavity 208 from the air inlet 201. Under the action of the air flow, the seeds inside the seed chamber 207 are mixed with the seeds and enter the mixed seed tube 2022, and the seeds are transported to the seed inlet 301 of the single seed box 3 along the mixed seed tube 2022 and the ventilation hose 5.

[0027] Furthermore, the seed chambers 207 are located on both sides of the seed dual-cavity distribution device 2 , with a row of seed chambers 207 provided on each side. The top of each seed chamber 207 is open, and the top is connected to the large seed box 1 .

[0028] Furthermore, the seed mixing tube 2022 is bent at 90°, and two openings are provided at the bottom of the seed mixing tube 2022, one opening is connected to the air flow cavity 208, and the other opening is connected to the seed chamber 207; the opening connected to the air flow cavity 208 is the air flow inlet 2023, and the opening connected to the seed chamber 207 is the seed inlet 206; a screen 2021 is provided at the position of the air flow inlet 2023, and the function of the screen 2021 is mainly to separate the middle cavity and the seeds so that the seeds cannot flow into the middle air flow cavity 208. When seeding, the air flow passes through the bottom screen 2021 and enters the seed mixing tube 2022, while preventing the seeds from entering the air flow cavity 208; that is, the entire air flow cavity 208 and the seed chamber 207 are separated.

[0029] Furthermore, an air flow control port is also provided on each of the mixed seed tubes 2022, and the opening and closing of the air flow control port is controlled by the rotation of another air flow regulating valve, thereby realizing individual control of each mixed seed tube 2022, and enabling discontinuous row sowing during sowing operations, bringing more possibilities for sowing operations.

[0030] Furthermore, this embodiment can also adjust the airflow size through the airflow regulating valve, and then adjust the seed delivery amount of each mixing tube 2022 or all mixing tubes 2022, thereby improving the sowing operation method; the automatic start and stop technology of airflow can effectively avoid the participation of complex electronic control components, save costs and reduce failure rates.

[0031] Further, such as Figure 6 、 Figure 7 As shown, the individual seed box 3 in this embodiment includes a box body, an air circulation screen 304 disposed therein, and a 30° inclined bottom plate in the individual seed box 3. A seed outlet 302 is disposed at the lowest position of the inclined bottom plate, and an air circulation screen 304 is disposed at the highest position thereof. The seed outlet 302 is connected to a vertical pipe 303 to deliver seeds to the precision seed metering device 4. The 30° inclined bottom plate in the individual seed box 3 allows seeds entering the individual seed box 3 to preferentially fill the corner where the seed outlet 302 is located. The seed outlet 302 is connected to a vertical pipe 303 to deliver seeds to the precision seed metering device 4. Due to the 30° inclined bottom plate 305 in the individual seed box 3, the top of the air circulation screen 304 is higher than the seed outlet 302.

[0032] When the seeds in the single seed box 3 are full enough, the air circulation screen 304 is covered by the seeds and the airflow stops automatically; when the amount of seeds in the single seed box 3 drops to a sufficient amount, the air circulation screen 304 is exposed, the airflow starts automatically and is discharged through the air circulation screen 304, and the seeds are transported to the single seed box 3.

[0033] As a further implementation method, the seeds in the single seed box 3 enter the seed storage box 306 of the precision seed metering device 4 from the seed outlet 302 through the vertical pipe 303 under the action of gravity. During the whole process, there is no power involved.

[0034] Those skilled in the art can understand that a dual-chamber seed automatic start-stop delivery system can be used to Figure 3 , Figure 4 and Figure 5 and its related distribution and use to fully understand the present invention and all of its features.

[0035] When the dual-chamber seed automatic start-stop delivery system is operating, seeds in large seed box 1 flow into seed chamber 207 of dual-chamber seed distribution device 2 along the red direction in Figure 4. Airflow then flows through screen 2021 and into seed mixing tube 2022 along the direction indicated by the green arrow in Figure 4. The air's flow characteristics cause the seeds to agitate, causing them to follow the air flow from large seed box 1 to dual-chamber seed distribution device 2 and then to individual seed boxes 3.

[0036] The 30° tilted bottom plate of the individual seed box 3 allows seeds to enter the individual seed box 3 and preferentially fill the corner where the seed outlet 302 is located. The seed outlet 302 is connected to a vertical pipe 303, which feeds the seeds into the precision seed metering device 4. Because the bottom plate 305 is tilted at 30°, the top of the air circulation screen 304 is higher than the seed outlet 302, so the seed outlet 302 is always filled with seeds, preventing seed shortage.

[0037] Example 2: This embodiment provides a method for using a dual-chamber structured conveying device for conveying large-grain seeds, comprising the following steps: Transport: The fan air enters the dual-chamber seed distribution device through the air inlet. When the airflow control valve is closed, air flows through the bottom outlet of the multi-shell airflow chamber and enters the seed mixing tube. Under the action of negative pressure, the seeds in the seed chamber are drawn into the seed mixing tube, completing the seed-air mixing. The airflow then transports the seeds through the ventilation hose to the individual seed boxes. When the airflow control valve is open, air is discharged directly through the airflow port between the airflow chamber and the seed mixing tube, without any transport effect.

[0038] Storage: Seeds delivered to the individual seed boxes are stored. When the seeds in the individual seed boxes completely cover the air circulation screen, airflow is blocked and seed delivery automatically stops. Under the action of gravity, the seeds stored in the individual seed boxes enter the seed metering device through the vertical seed guide tube from the seed outlet. Under the action of the precision seed metering device, the seeds in the individual seed boxes are gradually consumed. When the amount of seeds in the individual seed boxes drops to a sufficient level, the air circulation screen is exposed again, and airflow automatically begins to circulate. The seeds in the seed dual-chamber distribution device are again delivered to the individual seed boxes until the air circulation screen is covered by seeds and stops. At this time, the seeds in the large seed box also gradually flow into the seed dual-chamber distribution device.

[0039] Seeding: Under negative pressure, the precision seed meter draws in seeds from the individual seed boxes, and the motor drives the seed meter to complete the seeding process. As the precision seed meter operates steadily, seeds from the individual seed boxes continuously enter the precision seed meter, which in turn drives the dual-chamber seed distribution system to continuously deliver seeds. Seeds enter the dual-chamber seed distribution system from the large seed box, where they are transported by airflow into the individual seed boxes for storage. Gravity forces the seeds into the seed meter and discharge them, completing the seeding process.

[0040] Configuration: A dual-chamber seed distribution system can be added or removed based on the number of seeding rows. The system features a primary air inlet at one end and a sealing cover at the other. Adjacent housings are interlocked via side grooves and bosses, and multiple housings are connected using screws.

[0041] In response to the demand for centralized seed transportation for efficient operation of large-scale sowing equipment, the inventors designed an integrated conveying device that transports large-grain seeds from large seed boxes to small seed boxes for sowing. Combining pneumatic conveying technology and precision seeding technology, it can achieve efficient and high-speed sowing of large-scale sowing equipment.

[0042] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A dual-chamber seed automatic start-stop conveying system, characterized in that: It includes a large seed box, a seed dual-cavity distribution device, a single seed box and a precision seed meter. The seed dual-cavity distribution device is fixed to the bottom of the large seed box by bolts. The seed dual-cavity distribution device includes two rows of seed chambers arranged in sequence, and an air flow cavity is provided between the two rows of seed chambers along the arrangement direction of the seed chambers. An air inlet is provided at one end of the air flow cavity, and a sealing cover is provided at the other end. An air flow regulating valve is provided on the sealing cover. Each seed chamber is inserted with a mixed seed tube, and the bottom of the mixed seed tube is connected to the seed chamber and the air flow cavity; the outlet of the mixed seed tube is connected to the single seed box through a ventilation hose, and the lower outlet of the single seed box is connected to the precision seed meter.

2. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: The seed mixing tube is bent at 90 degrees, and a seed inlet and an air flow inlet are arranged at the bottom thereof, and a screen is arranged at the position of the air flow inlet.

3. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: The front and rear seed chambers and the airflow chamber of the seed dual-chamber distribution device are fastened together by buckles to form a whole.

4. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: The seed chambers may be independent of each other or connected.

5. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: The top of the side wall of the airflow cavity is provided with two guide plates inclined to the left and right sides, the middle is provided with two straight plates, the lower part is provided with two inclined plates inclined downward, and the end of the lower inclined plate is provided with a guide tube.

6. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: An airflow control port is also provided on each of the mixing tubes, and the opening and closing of the airflow control port is controlled by the rotation of another airflow regulating valve.

7. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: The single seed box includes a box body, the top of the box body is connected to the seed dual-cavity distribution device through a ventilation hose, an air circulation screen is arranged on the box body, and the bottom plate in the single seed box is an inclined bottom plate; a seed outlet is arranged at a low position of the inclined bottom plate, and an air circulation screen is arranged at a high position thereof; the seed outlet is connected to a vertical pipe to send the seeds into the precision seed metering device.

8. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: The seed inlet and seed outlet of a single seed box are distributed diagonally.

9. The dual-chamber seed automatic start-stop conveying system according to claim 1, characterized in that: The air circulation screens are spaced apart by 2 mm.

10. The method for using the dual-chamber seed automatic start-stop conveying system according to any one of claims 1 to 19, characterized in that: The steps are as follows: The air volume of the fan enters the seed double-cavity distribution device through the air inlet. When the air flow regulating valve is closed, the air flow enters the seed mixing tube through the bottom outlet in the air flow cavity composed of multiple shells. Under the action of negative pressure, the seeds in the seed chamber are sucked into the seed mixing tube to complete the seed-air mixing. Under the action of air flow, the seeds are transported to the single seed box through the ventilation hose; when the air flow regulating valve is opened, the air flow is directly discharged through the air flow port between the air flow cavity and the seed mixing tube, and no transport effect is generated; The seeds transported to the individual seed boxes are stored. When the seeds in the individual seed boxes completely cover the air circulation screen, the air flow cannot circulate and the seed transport will automatically stop. The seeds stored in the individual seed boxes enter the seed metering device through the vertical seed guide tube from the seed outlet under the action of gravity. Under the action of the precision seed metering device, the seeds in the individual seed boxes are gradually consumed. When the amount of seeds in the individual seed boxes drops to a sufficient amount, the air circulation screen is exposed again, and the air flow automatically starts to circulate. The seeds in the seed dual-cavity distribution device are transported to the individual seed boxes again until the air circulation screen is covered by the seeds and stops. At this time, the seeds in the large seed box also gradually flow into the seed dual-cavity distribution device. The precision seed metering device absorbs the seeds flowing from the single seed box under the action of negative pressure, and the motor drives the seeding. As the precision seeder works stably, the seeds in the single seed box continuously enter the precision seeder, which in turn drives the seed dual-cavity distribution device to continuously deliver seeds; the seeds enter the seed dual-cavity distribution device from the large seed box, are stored in the single seed box with the air flow, and enter the seeder under their own gravity to be discharged, completing the seeding.

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