Precision seed suction device and method for rice cultivation

Abstract

This invention discloses a precision seed suction device and method for rice cultivation, relating to the field of agricultural machinery technology. Multiple seed suction wheels are connected by a connecting shaft, with a first rotary pneumatic connector and a second rotary pneumatic connector connected to both ends of the shaft. The outer circumference of each seed suction wheel has multiple sets of small holes of different diameters and numbers, and each set includes two types of holes symmetrically arranged along the connecting shaft. The positions of the holes on different seed suction wheels are identical. The connecting shaft has two air tubes, each communicating with one of the symmetrically arranged types of holes. One air tube is connected to the first rotary pneumatic connector, and the other is connected to the second rotary pneumatic connector. Both the first and second rotary pneumatic connectors can provide positive pressure, negative pressure, and atmospheric pressure to the air tubes. This invention has a simple structure and can adapt to the requirements of different rice varieties regarding the number of grains.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, specifically to a precision seed suction device and method for rice cultivation. Background Technology

[0002] Direct seeding of rice requires removing rice seeds from the seed box and placing them in holes in the field. The field working environment makes it difficult to ensure accurate seed counting and that missed seeds are not easily detected. Even if they are detected, they cannot be remedied, which can easily lead to large-scale missed seeding.

[0003] Furthermore, due to the significant variation in the three-dimensional dimensions of rice seeds (japonica rice is short and thick, while indica rice is long and thin) and the different requirements for planting parameters (e.g., hybrid rice requires 1-2 seeds per hole, while conventional rice requires 3-4 seeds per hole), the existing hole-type and flange-type air-suction seeding mechanisms are complex in structure, prone to seed jamming, and the sealing rings used to prevent air leakage increase the resistance of moving parts and are prone to wear, making it difficult to ensure the number of seeds per hole, and the structure may damage the seeds.

[0004] For example, such as Figures 1-2 As shown, the existing air-suction seed suction mechanism carries seeds out of the hopper through the flange of the moving wheel. Under the combined action of negative pressure from the small hole under the flange (which is connected to the negative pressure hole within a certain rotation range), the seeds are carried to the sowing area. Gravity and positive pressure are used to distribute the seeds. The existing mechanism has the following drawbacks: it is easy to scratch the seeds, it is inconvenient to detect missed seeds, it is difficult to achieve accurate seed count, it has relatively moving parts, dynamic sealing is difficult, the seals are easily damaged, the structure is complex, and the versatility is poor. When changing to different shapes and sizes of seeds or changing the number of seeds per hole, it is often necessary to replace the moving wheel with a different groove structure and size. Summary of the Invention

[0005] The purpose of this invention is to provide a precision seed suction device and method for rice cultivation, which solves the problems existing in the prior art. It has a simple structure and can adapt to the requirements of different rice varieties for the number of grains.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention provides a precision seed suction device for rice cultivation, comprising a first rotary pneumatic connector, a second rotary pneumatic connector, a connecting shaft, and multiple seed suction wheels. The multiple seed suction wheels are connected by the connecting shaft, with the first rotary pneumatic connector and the second rotary pneumatic connector connected to each end of the connecting shaft, respectively. The outer circumference of each seed suction wheel is provided with multiple sets of small holes of different diameters and numbers, and each set of small holes includes two types of small holes symmetrically arranged along the connecting shaft. The positions of the small holes on different seed suction wheels are the same. The connecting shaft is provided with two air tubes, which are respectively connected to the two types of small holes symmetrically arranged. One air tube is connected to the first rotary pneumatic connector, and the other air tube is connected to the second rotary pneumatic connector. Both the first rotary pneumatic connector and the second rotary pneumatic connector can provide positive pressure, negative pressure, and atmospheric pressure to the air tubes.

[0008] Preferably, the end face of the seed suction wheel is provided with a plurality of large holes, and each type of small hole is connected to a large hole. Two large holes corresponding to the same group of small holes are symmetrically arranged along the connecting axis. The positions of the large holes on different seed suction wheels are the same. All large holes with the same position are connected in series through a hole air pipe, and the hole air pipe can be connected to the axis air pipe.

[0009] Preferably, the seed suction wheel and the connecting shaft are connected by a key.

[0010] Preferably, the holes of the same type are arranged along the axial direction of the connecting shaft.

[0011] Preferably, among the same type of holes, the distance between adjacent holes is greater than the sum of the hole diameter and the seed length.

[0012] Preferably, the seed suction wheel is further provided with a diffuse reflection sensor, which is used to detect whether there are seeds on the small hole.

[0013] The present invention also provides a precise seed suction method for rice cultivation, comprising the following steps using any one of the above technical solutions:

[0014] S1. A first rotary pneumatic connector is connected to a hole air pipe corresponding to the small hole in the seed suction area via a shaft air pipe, and a second rotary pneumatic connector is connected to a hole air pipe corresponding to the small hole in the seed dispensing area via another shaft air pipe, with the small holes in the two locations being symmetrically arranged;

[0015] S2. The first rotary pneumatic connector introduces negative pressure into the large holes corresponding to the small holes in the seed suction area through the shaft air pipe and the hole air pipe. At the same time, the seed suction wheel rotates 180°, so that the small holes connected to the first rotary pneumatic connector adsorb and drive the seeds to rotate to the seeding area. The small holes connected to the second rotary pneumatic connector rotate to the seed suction area.

[0016] S3. The first rotary pneumatic connector introduces atmospheric pressure into the large holes corresponding to the small holes in the seeding area through the axial air pipe and the perforated air pipe, so that the seeds in the small holes connected to the first rotary pneumatic connector fall into the hole. At the same time, the second rotary pneumatic connector introduces negative pressure into the large holes corresponding to the small holes in the seed suction area through the axial air pipe and the perforated air pipe.

[0017] S4. The seed suction wheel continues to rotate. The first rotary pneumatic connector introduces positive pressure into the large holes corresponding to the small holes in the clearing area through the shaft air pipe and the perforated air pipe. This causes the small holes connected to the second rotary pneumatic connector to suck up and drive the seeds to rotate to the seeding area. The second rotary pneumatic connector introduces atmospheric pressure into the large holes corresponding to the small holes in the seeding area through the shaft air pipe and the perforated air pipe. This causes the seeds in the small holes connected to the second rotary pneumatic connector to fall into the holes. Then, the second rotary pneumatic connector introduces positive pressure into the large holes corresponding to the small holes in the seeding area through the shaft air pipe and the perforated air pipe.

[0018] S5. When sowing is completed and the next variety of seeds is replaced, connect the axial air pipes corresponding to the first and second rotary pneumatic joints to the air pipes corresponding to the small holes of other groups.

[0019] The present invention achieves the following technical effects compared to the prior art:

[0020] This invention provides a precision seed suction device and method for rice cultivation. Multiple seed suction wheels are connected by a connecting shaft to achieve synchronous rotation. Furthermore, multiple sets of seed suction wheels can be connected in series to achieve multi-row planting. The row spacing can be adjusted by changing the spacing between the seed suction wheels. The two ends of the connecting shaft are respectively connected to a first rotary pneumatic connector and a second rotary pneumatic connector. The device is simple to manufacture and install, has no relatively moving parts or easily damaged parts such as dynamic seals, and offers good airtightness while preventing air hose entanglement during operation. The outer circumference of the seed suction wheels is provided with multiple sets of small holes of different diameters and numbers, thus eliminating the need to replace the seed suction wheels when changing varieties or planting parameters, achieving multi-purpose use of a single wheel and meeting the requirements of different rice seed morphologies and the number of seeds per hill for each variety. Each set of small holes is covered with... The device includes two types of small holes symmetrically arranged along the connecting axis. The positions of the small holes on different seed suction wheels are all the same, thus enabling two seed suctions and two seed placements per rotation of the seed suction wheel. The connecting shaft is equipped with two air tubes, which are connected to the two types of small holes respectively. The number of connected holes is small, the air consumption is small, and the metering is accurate. One air tube is connected to the first rotary pneumatic connector, and the other air tube is connected to the second rotary pneumatic connector. Both the first and second rotary pneumatic connectors can provide negative pressure, atmospheric pressure, and positive pressure to the air tubes, thereby realizing seed suction, seed placement, and hole cleaning in sequence. Different hole diameters and numbers of small holes can be combined. At the same time, the seeds are adsorbed onto the small holes by negative pressure without other mechanical scraping, and are not affected by factors such as seed shape and length. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of an existing air-suction seed suction mechanism;

[0023] Figure 2 yes Figure 1 Enlarged schematic diagram of the flange of the driving wheel;

[0024] Figure 3 This is a schematic diagram of the precision seed suction device used for rice cultivation in Embodiment 1;

[0025] Figure 4 This is a pneumatic circuit diagram of the precision seed suction device used for rice cultivation in Example 1;

[0026] Figure 5 This is a cross-sectional view of the seed suction wheel in Example 1;

[0027] Figure 6This is a unfolded view of the circumferential surface of the seed suction wheel in Example 1;

[0028] In the diagram: 1-connecting shaft, 2-gear, 3-bearing, 4-key, 5-seed suction wheel, 6-vacuum pump, 7-air compressor, 8-small hole, 9-large hole, point A connects to the first rotary pneumatic connector, and point B connects to the second rotary pneumatic connector. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The purpose of this invention is to provide a precision seed suction device and method for rice cultivation, in order to solve the technical problem that existing rice cultivation devices have complex structures and cannot adapt to the grain count requirements of different rice varieties.

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1

[0033] like Figures 3-6As shown, this embodiment provides a precision seed suction device for rice cultivation, including a first rotary pneumatic connector, a second rotary pneumatic connector, a connecting shaft 1, and multiple seed suction wheels 5. The multiple seed suction wheels 5 are connected via the connecting shaft 1 to achieve synchronous rotation. Simultaneously, multiple sets of seed suction wheels 5 can be connected in series to achieve multi-row planting. Changing the spacing between the seed suction wheels 5 adjusts the row spacing. The two ends of the connecting shaft 1 are respectively connected to the first rotary pneumatic connector and the second rotary pneumatic connector. Point A in the figure connects to the first rotary pneumatic connector, and point B connects to the second rotary pneumatic connector. The device is simple to manufacture and install, has no relatively moving parts, no easily damaged parts such as dynamic seals, and has good airtightness, while also preventing air hose entanglement during operation. The outer circumference of the seed suction wheel 5 is provided with multiple sets of small holes 8 of different diameters and numbers, thus eliminating the need to replace the seed suction wheel 5 when changing varieties or planting parameters, achieving multi-purpose use of one wheel and meeting various needs. The morphology of rice seeds of the same variety and the requirements for the number of seeds per hole for this variety; each group of holes 8 includes two types of holes 8 symmetrically arranged along the connecting shaft 1. The positions of the holes 8 on different seed suction wheels 5 are the same, so that the seed suction wheel 5 can perform two seed suctions and two seed placements for each rotation. The connecting shaft 1 is equipped with two axial air pipes, which are respectively connected to the two types of holes 8 symmetrically arranged. The number of holes connected at the same time is small, the air consumption is small, and the quantitative accuracy is precise. One axial air pipe is connected to the first rotary pneumatic connector, and the other axial air pipe is connected to the second rotary pneumatic connector. The first rotary pneumatic connector and the second rotary pneumatic connector can provide negative pressure, atmospheric pressure and positive pressure to the axial air pipe, and realize seed suction, seed placement and hole cleaning in sequence. Different hole diameters and numbers of holes 8 are combined. At the same time, the seeds are adsorbed on the holes 8 by negative pressure, without other mechanical scraping, and are not affected by factors such as seed shape and length.

[0034] Specifically, the end face of the seed suction wheel 5 is provided with multiple large holes 9, and each type of small hole 8 is connected to a large hole 9. The two large holes 9 corresponding to the same group of small holes 8 are symmetrically arranged along the connecting shaft 1. The positions of the large holes 9 on different seed suction wheels 5 are the same. The large holes 9 in the same position are connected in series through a hole air pipe, and the hole air pipe can be connected to the shaft air pipe. Thus, by setting the large holes 9, each corresponding small hole 8 can be connected to the shaft air pipe, thereby realizing the introduction of negative pressure, atmospheric pressure or positive pressure into each small hole 8, realizing negative pressure seed suction, gravity seeding and positive pressure hole cleaning, effectively preventing the small holes 8 from being blocked.

[0035] The seed suction wheel 5 and the connecting shaft 1 are connected by a key 4, which enables the connecting shaft 1 to drive the seed suction wheel 5 to rotate.

[0036] The two ends of the connecting shaft 1 are hollow and form air tubes. Gears 2 and bearings 3 are sleeved on both ends of the connecting shaft 1.

[0037] The same type of small holes 8 are arranged along the axial direction of the connecting shaft 1, which can correspond to different numbers of seeds required for hole sowing.

[0038] Among similar holes 8, the distance between adjacent holes 8 is greater than the sum of the hole diameter and the seed length. The size of the hole diameter is determined based on the seed's own weight, the friction between seeds, and the centrifugal force during rotation.

[0039] During the design process, the number of preset varieties can be increased by increasing the diameter of the seed suction wheel 5, the seed film sowing width can be increased by increasing the number of seed suction wheels 5, and the row spacing of rice can be changed by changing the spacing between the seed suction wheels 5.

[0040] Each seed-absorbing wheel 5 can use the same set of small holes 8 for the same type of seed, or each seed-absorbing wheel 5 can use different sets of small holes 8 to absorb different seeds, or two or more rows of seed-absorbing wheels 5 can be used to change the combination of different seed-absorbing wheels 5 to achieve intercropping, relay cropping, or patterned planting. Furthermore, the control logic of the air valve can realize the synchronous application of negative pressure, atmospheric pressure, and positive pressure to multiple seed-absorbing wheels 5.

[0041] The seed suction wheel 5 is also equipped with a diffuse reflection sensor, which is used to detect whether there are seeds on the small hole 8. This solves the problem of real-time detection of small particles, large range, and low cost of missed seeds, and avoids continuous missed sowing.

[0042] Example 2

[0043] like Figures 3-6 As shown, this embodiment provides a precise seed suction method for rice cultivation, using the precise seed suction device for rice cultivation from Embodiment 1, including the following steps:

[0044] S1. A first rotary pneumatic connector is connected to the hole air pipe corresponding to the small hole 8 in the seed suction area through a shaft air pipe, and a second rotary pneumatic connector is connected to the hole air pipe corresponding to the small hole 8 in the seed dispensing area through another shaft air pipe, and the small holes 8 in the two places are symmetrically arranged;

[0045] S2. The first rotary pneumatic connector introduces negative pressure into the large holes 9 corresponding to the small holes 8 in the seed suction area through the shaft air pipe and the hole air pipe. At the same time, the seed suction wheel 5 rotates 180°, so that the small holes 8 connected to the first rotary pneumatic connector adsorb and drive the seeds to rotate to the seeding area, and the small holes 8 connected to the second rotary pneumatic connector rotate to the seed suction area.

[0046] S3. The first rotary pneumatic connector introduces atmospheric pressure into the large holes 9 corresponding to each small hole 8 in the seeding area through the axial air pipe and the perforated air pipe, so that the seeds in the small holes 8 connected to the first rotary pneumatic connector fall into the hole. At the same time, the second rotary pneumatic connector introduces negative pressure into the large holes 9 corresponding to each small hole 8 in the seed suction area through the axial air pipe and the perforated air pipe.

[0047] S4. The seed suction wheel 5 continues to rotate. The first rotary pneumatic connector introduces positive pressure into the large holes 9 corresponding to each small hole 8 in the clearing area through the shaft air pipe and the perforated air pipe. This causes the small holes 8 connected to the second rotary pneumatic connector to absorb and drive the seeds to rotate to the seeding area. The second rotary pneumatic connector introduces atmospheric pressure into the large holes 9 corresponding to each small hole 8 in the seeding area through the shaft air pipe and the perforated air pipe. This causes the seeds in the small holes 8 connected to the second rotary pneumatic connector to fall into the holes. Then, the second rotary pneumatic connector introduces positive pressure into the large holes 9 corresponding to each small hole 8 in the seeding area through the shaft air pipe and the perforated air pipe.

[0048] S5. When sowing is completed and the next variety of seeds is replaced, connect the axial air pipes corresponding to the first and second rotary pneumatic joints to the air pipes corresponding to the small holes 8 of other groups.

[0049] The pneumatic operation of the first and second rotary pneumatic joints in this embodiment is described as follows:

[0050] 1. When small hole 8 rotates to the storage hopper position, negative pressure is continuously applied and maintained until small hole 8 rotates to the next seed position;

[0051] 2. When the small hole 8 is rotated to the next seeding position, atmospheric pressure is continuously supplied;

[0052] 3. When the small hole 8 rotates to the position opposite to the forward speed of the bottom film, the positive pressure cleaning hole is briefly activated.

[0053] Negative pressure is provided by vacuum pump 6, and positive pressure is provided by air compressor 7.

[0054] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A precision seed suction device for rice cultivation, characterized in that: The device includes a first rotary pneumatic connector, a second rotary pneumatic connector, a connecting shaft, and multiple seed-absorbing wheels. The multiple seed-absorbing wheels are connected by the connecting shaft, which can drive each seed-absorbing wheel to rotate synchronously. The two ends of the connecting shaft are respectively connected to the first rotary pneumatic connector and the second rotary pneumatic connector. The outer circumference of each seed-absorbing wheel is provided with multiple sets of small holes of different diameters and numbers to meet the requirements of different varieties of rice seeds morphology and the number of seeds per hole. Each set of small holes includes two types of small holes symmetrically arranged along the connecting shaft. The positions of the small holes on different seed-absorbing wheels are the same. The connecting shaft is provided with two air tubes, which are respectively connected to the two types of small holes symmetrically arranged. One air tube is connected to the first rotary pneumatic connector, and the other air tube is connected to the second rotary pneumatic connector. Both the first rotary pneumatic connector and the second rotary pneumatic connector can provide positive pressure, negative pressure, and atmospheric pressure to the air tubes. The end face of the seed suction wheel is provided with multiple large holes. Each type of small hole is connected to one of the large holes. Two large holes corresponding to the same group of small holes are symmetrically arranged along the connecting axis. The positions of the large holes on different seed suction wheels are the same. All large holes with the same position are connected in series through a hole air pipe, and the hole air pipe can be connected to the axis air pipe. The small holes of the same type are arranged along the axial direction of the connecting shaft.

2. The precision seed suction device for rice cultivation according to claim 1, characterized in that: The seed suction wheel and the connecting shaft are connected by a key.

3. The precision seed suction device for rice cultivation according to claim 1, characterized in that: In the same type of small holes, the distance between adjacent small holes is greater than the sum of the hole diameter and the seed length.

4. The precision seed suction device for rice cultivation according to claim 1, characterized in that: The seed suction wheel is also equipped with a diffuse reflection sensor, which is used to detect whether there are seeds on the small hole.

5. A precise seed-taking method for rice cultivation, characterized in that: The precise seed-collecting device for rice cultivation according to any one of claims 1-4 includes the following steps: S1. A first rotary pneumatic connector is connected to a hole air pipe corresponding to the small hole in the seed suction area via a shaft air pipe, and a second rotary pneumatic connector is connected to a hole air pipe corresponding to the small hole in the seed dispensing area via another shaft air pipe, with the small holes in the two locations being symmetrically arranged; S2. The first rotary pneumatic connector introduces negative pressure into the large holes corresponding to the small holes in the seed suction area through the shaft air pipe and the hole air pipe. At the same time, the seed suction wheel rotates 180°, so that the small holes connected to the first rotary pneumatic connector adsorb and drive the seeds to rotate to the seeding area. The small holes connected to the second rotary pneumatic connector rotate to the seed suction area. S3. The first rotary pneumatic connector introduces atmospheric pressure into the large holes corresponding to the small holes in the seeding area through the axial air pipe and the perforated air pipe, so that the seeds in the small holes connected to the first rotary pneumatic connector fall into the hole. At the same time, the second rotary pneumatic connector introduces negative pressure into the large holes corresponding to the small holes in the seed suction area through the axial air pipe and the perforated air pipe. S4. The seed suction wheel continues to rotate. The first rotary pneumatic connector introduces positive pressure into the large holes corresponding to the small holes in the clearing area through the shaft air pipe and the perforated air pipe. This causes the small holes connected to the second rotary pneumatic connector to suck up and drive the seeds to rotate to the seeding area. The second rotary pneumatic connector introduces atmospheric pressure into the large holes corresponding to the small holes in the seeding area through the shaft air pipe and the perforated air pipe. This causes the seeds in the small holes connected to the second rotary pneumatic connector to fall into the holes. Then, the second rotary pneumatic connector introduces positive pressure into the large holes corresponding to the small holes in the seeding area through the shaft air pipe and the perforated air pipe. S5. When sowing is completed and the next variety of seeds is replaced, connect the axial air pipes corresponding to the first and second rotary pneumatic joints to the air pipes corresponding to the small holes of other groups.

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