A hybrid rice precision seeding device

Abstract

The present invention relates to the technical field of agricultural machinery, and more particularly to a hybrid rice precision sowing device, comprising a seeder having a support fixedly connected to the bottom of the seeder, a housing fixedly connected to the support, a sowing tray rotatably connected within the housing, and a seed box fixedly connected to the other side of the housing; a seeding assembly for discharging rice seeds is provided on one side of the seed box, a channel assembly is provided within the seeding assembly for slowing the falling speed of the rice seeds and assisting in screening rice seeds of different specifications; an air blowing assembly is provided at one end near the bottom of the channel assembly for preventing rice seeds from accumulating within the channel assembly; a screening assembly is provided at the other end of the bottom of the channel assembly for separating rice seeds of different specifications; and a discharge assembly is provided below the screening assembly for draining backflow water in a furrow during sowing. The present invention uses the airflow of the air blowing assembly to sort the rice seeds while also using the airflow to blow out backflow water during furrowing, thereby reducing the probability of seeds drifting with the water flow, thereby meeting the requirements of precision sowing.

Description

Technical Field

[0001] The present invention relates to the technical field of agricultural machinery, and in particular to a hybrid rice precision seeding device. Background Art

[0002] Hybrid rice is widely used in agricultural production due to its high yield, high quality, and strong stress resistance. However, due to its relatively high production cost, hybrid rice seeds are generally more expensive than conventional rice seeds. To reduce production costs and improve economic efficiency, precision seeding ensures that each seed receives sufficient growing space and nutrients, thereby improving seed germination and survival rates. This is crucial for improving the yield and quality of hybrid rice. However, hybrid rice is prone to problems when precision seeding is carried out directly in paddy fields.

[0003] First, the soil conditions of paddy fields are complex and changeable. When sowing in paddy fields, it is usually necessary to dig trenches in order to sow rice seeds into the soil. However, after the rice seeds are furrowed by the seeder, the water tends to flow back into the trench. The rice seeds that are pneumatically sown from the bottom support of the seeder are easily affected by water erosion and uneven soil coverage, resulting in the rice seeds being unable to closely combine with the soil and take root. In addition, the vertical design of the traditional seed tube causes the initial velocity of the seeds to be too fast, exacerbating the water erosion deviation. This will not only affect the germination rate of the rice seeds, but also increase the difficulty and cost of later management. Secondly, the traditional sowing device cannot completely and accurately remove all unqualified seeds, resulting in a high void rate. This not only wastes land resources, but may also affect the overall yield and quality due to the growth of unqualified seeds. Summary of the Invention

[0004] To solve the above problems, the present invention provides a hybrid rice precision seeding device, which uses the airflow of the blowing component to sort the rice seeds while using the airflow to blow out the backflow water when the furrows are opened, thereby reducing the probability of seeds drifting with the water flow, thereby meeting the precision seeding needs.

[0005] To achieve the above-mentioned object, the technical solution of the present invention is as follows: A hybrid rice precision seeding device comprises a seeding machine, a support fixedly connected to the bottom of the seeding machine, a servo motor provided on one side of the support, the servo motor signal being connected to a controller, the output shaft of the servo motor being coaxially fixedly connected to a rotating shaft, the rotating shaft being rotatably connected to the support, a housing fixedly connected to the support, a seeding tray for adsorbing and transporting rice seeds by negative pressure being rotatably connected inside the housing, the seeding tray being coaxially fixedly connected to the rotating shaft, a negative pressure aspirator provided on one side of the housing, the negative pressure aspirator being connected to the controller signal, a seed box fixedly connected on the other side of the housing, and a closed seed cavity being formed between the housing and the seed box;

[0006] A seed-discharging assembly for discharging rice seeds is provided on one side of the seed box, and a channel assembly for slowing down the falling speed of the rice seeds and assisting in screening rice seeds of different specifications is provided in the seed-discharging assembly. A blowing assembly for preventing the accumulation of rice seeds in the channel assembly is provided at one end near the bottom of the channel assembly, and a screening assembly for separating rice seeds of different specifications is provided at the other end of the bottom of the channel assembly. The screening assembly, the bottom end of the channel assembly and the blowing assembly form a passage interconnected with each other, and the gas enters the screening assembly through the blowing assembly. A discharge assembly for draining backflow water in the ditch during sowing is provided below the screening assembly.

[0007] The technical principles of the above scheme are as follows:

[0008] By adding rice seeds into the seed box, the controller starts the servo motor and the negative pressure suction machine respectively. While the servo motor drives the sowing tray to rotate, the negative pressure suction machine generates negative pressure and absorbs the rice seeds to the sowing tray, and transports the rice seeds to the seeding assembly. The channel assembly slows down the speed of the rice seeds, and the blowing assembly blows air laterally at the bottom of the channel assembly. The screening assembly separates rice seeds of different specifications, among which lightweight rice seeds are blown into the screening assembly, while full rice seeds heavier than the lightweight rice seeds continue to fall in the seeding assembly and are sown in the field. During the continuous blowing of the airflow in the blowing assembly, it enters the discharge assembly through the screening assembly, and the gas is blown out through the discharge assembly to disperse the backflow water in the ditch opened during sowing, forming a temporary water-free area, ensuring that the full rice seeds sink into the soil for cultivation.

[0009] The above scheme has the following beneficial effects:

[0010] 1. This solution can achieve accurate placement of rice seeds through negative pressure adsorption and precise rotation of the sowing disc, ensuring that each rice seed can be sown according to the predetermined position and spacing, thereby improving the uniformity and efficiency of sowing.

[0011] 2. This solution, through the cooperation of the blowing component and the screening component, can effectively separate rice seeds of different specifications, ensuring that only full and healthy rice seeds are sown, thereby improving the seed emergence rate and crop yield. The design of the channel component can slow down the falling speed of the rice seeds, preventing them from being damaged by falling too quickly, and also helps to screen lightweight rice seeds.

[0012] 3. In this solution, the design of the discharge component can drain the backflow water in the ditch during sowing, forming a temporary water-free area, ensuring that the rice seeds can sink smoothly into the soil and avoiding seed displacement or loss due to water erosion.

[0013] Furthermore, three adjacent adsorption holes are provided on the seeding plate every 30 degrees.

[0014] Beneficial effect: By evenly distributing three adsorption holes every 30°, the seeding disc can more evenly adsorb and transport rice seeds during rotation, ensuring that the rice seeds are more evenly distributed in each hole in the seeding area, avoiding uneven seeding caused by accumulation or sparseness of rice seeds.

[0015] Furthermore, a weight sensor is provided on the bottom wall of the seed box, and the weight sensor is connected to the controller signal.

[0016] Beneficial effect: The weight sensor can detect the weight of rice seeds in the seed box in real time and transmit the data to the controller. The operator can know the remaining amount of rice seeds at any time through the controller, so as to replenish the rice seeds in time and avoid interruptions caused by insufficient rice seeds during the sowing process.

[0017] Furthermore, the seeding assembly includes a seeding tube fixedly connected between the seed box and the seeding plate, the interior of the seeding tube is connected to the seed cavity, the top of the seeding tube is located in the motion trajectory of the rotation of the seeding plate, and the bottom end of the seeding tube extends to the bottom of the support and is connected to the outside of the support.

[0018] Beneficial effect: Since the top of the seeding tube is located in the motion trajectory of the rotating seeding disc, when the seeding disc absorbs the rice seeds and rotates above the seeding tube, the rice seeds can accurately fall into the seeding tube, and the transportation through the seeding tube ensures the smoothness of the rice seeds during the transportation process.

[0019] Furthermore, the channel assembly includes a threaded tube fixedly connected to the seeding tube channel, and the top and bottom ends of the threaded tube are respectively provided with a first outlet and a second outlet connected to the seeding path of the seeding tube. The rice seeds fall from the seeding tube to the first outlet and slide to the second outlet through the spiral path of the threaded tube.

[0020] Beneficial effects: 1. The spiral path of the threaded tube slows down the falling speed of the rice seeds. This helps the rice seeds to be arranged more smoothly during the sliding process, reducing the problem of accumulation or scattering caused by excessive speed.

[0021] 2. The spiral path of the threaded tube extends the movement trajectory of the rice seeds, and uses the friction between the rice seeds and the threaded tube to reduce the falling speed, ensuring that the rice seeds are discharged grain by grain and evenly. The rice seeds naturally disperse when sliding in the spiral path of the threaded tube, avoiding falling in clumps, and improving the consistency of sowing row spacing.

[0022] Furthermore, the blowing assembly includes a blowing pipe and an air pump. The air pump is located on a side close to the negative pressure suction machine and is fixedly connected to the support. The air pump is connected to the controller signal. One end of the blowing pipe is connected to the output port of the air pump, and the other end of the blowing pipe is connected to the side of the spiral path away from the second outlet at the bottom end of the threaded tube, and the airflow direction of the blowing pipe is consistent with the tangential direction of the spiral path.

[0023] Beneficial Effects: When rice seeds fall to the bottom of the threaded tube, the air pipe injects air into the spiral path, blowing light rice seeds into the screening assembly to separate them from plump seeds, thereby improving seedling emergence. The airflow also creates localized turbulence at the bottom of the threaded tube, removing some moisture from the seed dispensing tube and preventing accumulation of plump seeds that could cause seeding to become stuck. Furthermore, by adjusting the air pump's blowing intensity through a controller, the sliding speed of plump seeds in the threaded tube can be indirectly controlled, enabling stepless adjustment of seeding density without replacing mechanical components.

[0024] Furthermore, the screening component includes a recovery chamber fixedly connected to the outer wall of the seed discharging tube, and a recovery port is opened on the recovery chamber. The recovery port is laterally connected to the spiral path near the second outlet at the bottom end of the threaded tube, and a first filter screen for filtering full rice seeds is fixedly connected to the recovery port.

[0025] Beneficial Effects: The first filter screens rice seeds entering the recovery chamber, ensuring that only plump, healthy seeds remain in the seed tube. Using plump, healthy seeds for sowing helps improve crop germination and growth quality. Impurities, damaged, or hollow, lightweight rice seeds are removed and enter the recovery chamber. The lightweight seeds in the recovery chamber can be further cleaned and processed before reuse, reducing rice seed waste and increasing seed utilization.

[0026] Furthermore, a second filter screen for filtering rice seeds and rice husks of different specifications is fixedly connected to the bottom of the recovery chamber.

[0027] Beneficial effect: The second filter screen prevents the lightweight rice seeds from continuing to fall after entering the recovery chamber, while the airflow passes through the gaps in the filter screen and enters the discharge assembly to discharge the return water in the ditch.

[0028] Furthermore, the discharge assembly includes an exhaust pipe symmetrically arranged at the bottom of the second filter screen, the outer walls of the exhaust pipe are fixedly connected to the outer walls of the seed discharge pipe, the bottom end of the exhaust pipe is provided with a nozzle, the top diameter of the exhaust pipe is larger than the diameter of the nozzle, and the end of the exhaust pipe close to the nozzle is arc-shaped, and the nozzle is flat-mouthed.

[0029] Beneficial Effects: The airflow discharged from the nozzle displaces the backflow water in the seeding furrow, creating a temporary water-free zone on both sides of the seeding tube. This ensures that plump rice seeds directly contact the soil after being discharged from the seeding tube into the water-free zone, thereby improving the sedimentation rate. As the inner diameter of the exhaust pipe gradually decreases, the airflow velocity increases as it passes through the exhaust pipe due to the Venturi effect, increasing the impact force of the backflow water in the furrow. At the same time, the local low-pressure area formed by the rapid airflow when blowing away the water surface suppresses water disturbance and reduces the probability of seed drifting with the water flow.

[0030] Furthermore, a first photoelectric sensor and a second photoelectric sensor are fixedly connected to the side walls of the seeding tube close to the top and bottom ends of the threaded tube, respectively. The first photoelectric sensor and the second photoelectric sensor are both connected to the controller signal.

[0031] Beneficial effect: The first photoelectric sensor and the second photoelectric sensor respectively record the total number of rice seeds and the number of full rice seeds sorted by the air pipe, that is, the sowing number, and the sowing rate can be calculated. The sowing rate data is used to mark the inefficient areas, which can remind the operator to replant later and reduce the loss of missed sowing.

[0032] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is an axonometric diagram of an embodiment of a hybrid rice precision seeding device according to the present invention;

[0034] Figure 2 In the embodiment of the hybrid rice precision seeding device of the present invention Figure 1 A schematic diagram of a forward cross-sectional view of part A;

[0035] Figure 3 This is an axonometric diagram of a threaded tube of an embodiment of a hybrid rice precision seeding device of the present invention;

[0036] Figure 4 This is a disassembled axonometric view of a seeding tray and a seed box of an embodiment of a hybrid rice precision seeding device of the present invention;

[0037] Figure 5 This is a schematic isometric view of a seed box from another perspective of an embodiment of the hybrid rice precision seeding device of the present invention.

[0038] The figure marks in the drawings of the specification include: 1. seed box; 2. support; 3. seed discharge tube; 4. negative pressure suction machine; 5. seeding tray; 6. air pump; 7. recovery chamber; 8. exhaust pipe; 9. nozzle; 10. blow pipe; 11. adsorption hole; 12. first photoelectric sensor; 13. threaded tube; 14. second photoelectric sensor; 15. outer shell. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] The following is further described in detail through specific implementation methods:

[0043] Example 1:

[0044] As attached Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown: A hybrid rice precision seeding device includes a seeding machine, a support 2 is welded to the bottom of the seeding machine, a servo motor is screwed to one side of the support 2, the servo motor signal is connected to the controller, the output shaft of the servo motor is connected to the rotating shaft via a coaxial bearing, the rotating shaft is rotatably connected to the support 2, a shell 15 is welded to the support 2, a seeding tray 5 for adsorbing rice seeds by negative pressure and transporting them is rotatably connected inside the shell 15, the seeding tray 5 is connected to the coaxial bearing of the rotating shaft, a negative pressure aspirator 4 is screwed to one side of the shell 15, and the negative pressure aspirator 4 is connected to the controller signal.

[0045] The other side of the housing 15 is bolted to a seed box 1, forming a closed seed chamber between the housing 15 and the seed box 1. A weight sensor is screwed to the inner bottom wall of the seed box 1, and the weight sensor is connected to the controller signal. Before sowing, rice seeds are poured into the seed box 1. The weight sensor at the bottom of the seed box 1 monitors the remaining rice seeds in the seed box 1 in real time. When the rice seeds are loaded to the seed box 1 load threshold or when the remaining rice seeds in the seed box 1 fall below the threshold, the controller triggers an alarm to stop adding seeds or to replant. At the same time, the weight sensor is used to transmit the weight of the rice seeds before and after sowing to the controller.

[0046] During the sowing process, the servo motor is started by the controller, and the sowing disc 5 rotates at a constant speed along with the rotating shaft. At the same time, the controller starts the negative pressure suction machine 4 to absorb the rice seeds in the seed box 1 onto the sowing disc 5, and the sowing disc 5 rotates with it.

[0047] A seeding assembly for discharging rice seeds is provided on one side of the seed box 1. The seeding assembly includes a seeding tube 3 integrally formed between the seed box 1 and the sowing tray 5. The interior of the seeding tube 3 is connected to the seed cavity, and the top of the seeding tube 3 is located in the motion trajectory of the sowing tray 5. When the sowing tray 5 that adsorbs the rice seeds rotates to above the seeding tube 3, the negative pressure is released, and the rice seeds fall into the seeding tube 3. The bottom end of the seeding tube 3 extends to the bottom of the support 2 and is connected to the outside of the support 2.

[0048] Under conventional technology, the vertical setting of the seed-discharging tube 3 makes the free fall speed of the rice seeds faster, which easily leads to uneven sowing density, resulting in multiple rice seeds piling up in each hole of the paddy field or too sparse rice seeds in the hole, which is more obvious especially during high-speed sowing. Therefore, a channel component is provided in the seed-discharging tube 3 for slowing down the falling speed of the rice seeds and assisting in screening rice seeds of different specifications. The channel component includes a threaded tube 13 welded in the channel of the seed-discharging tube 3. The top and bottom ends of the threaded tube 13 are respectively provided with a first outlet and a second outlet of the seed-discharging path connected to the seed-discharging tube 3. The rice seeds fall from the seed-discharging tube 3 to the first outlet, and slide down along the spiral path of the threaded tube 13 to the second outlet. The spiral path of the corrugated tube 13 extends the movement trajectory of the rice seeds, and uses the friction between the rice seeds and the threaded tube 13 to reduce the falling speed, ensuring that the rice seeds are discharged grain by grain and evenly. The rice seeds are naturally dispersed when sliding in the spiral path of the threaded tube 13, avoiding falling in clumps, improving the consistency of the sowing row spacing, and thus achieving the purpose of precision sowing; at the same time, in the process of direct sowing in paddy fields, the vertically falling rice seeds may deviate from the target sowing position due to mud splashing or water flow disturbance in the paddy field. Therefore, the spiral path of the threaded tube 13 can slow down the falling speed of the rice seeds, and the initial velocity of the rice seeds is reduced when the rice seeds reach the second outlet, and then they are more likely to sink into the mud when discharged from the seed discharge tube 3.

[0049] One end near the bottom of the seed discharging pipe 3 is provided with a blowing assembly for preventing rice seeds from piling up on the spiral path of the threaded pipe 13. The blowing assembly includes a blowing pipe 10 and an air pump 6. The air pump 6 is located on one side near the negative pressure suction machine 4 and is screwed to the support 2. The air pump 6 is connected to the controller signal. One end of the blowing pipe 10 is connected to the output port of the air pump 6, and the other end of the blowing pipe 10 is connected to the spiral path sideways away from the second outlet at the bottom end of the threaded pipe 13, and the airflow direction of the blowing pipe 10 is consistent with the tangential direction of the spiral path. Since the rice seeds are directly discharged in the paddy field, the air flow direction of the blowing pipe 10 is consistent with the tangential direction of the spiral path. During sowing, the seeding tube 3 is easily affected by a humid environment. When the humidity of the rice seeds is high, they are easily blocked at the second outlet of the threaded tube 13. Therefore, the controller starts the air pump 6 to blow air, and the airflow of the air pipe 10 forms a local turbulence at the bottom of the threaded tube 13, taking away some of the moisture in the seeding tube 3, avoiding the sowing jam caused by the accumulation of full rice seeds. At the same time, the airflow pushes the full rice seeds to slide against the outer wall of the threaded tube 13, using centrifugal force to keep them in an orderly arrangement, reducing the sowing deviation caused by mutual collision, and further achieving the purpose of precision sowing. In addition, by adjusting the blowing intensity of the air pump 6 by the controller, the sliding speed of the full rice seeds in the threaded tube 13 can be indirectly controlled. When the sowing amount needs to be reduced per unit area, the use of low-speed airflow can extend the residence time of the rice seeds at the bottom of the threaded tube 13, and the blowing intensity of the low-speed airflow is always greater than the weight of the light rice seeds preset by the controller; when the sowing amount needs to be increased per unit area, the use of high-speed airflow allows the rice seeds to quickly pass through the second outlet of the threaded tube 13, so that the sowing density can be adjusted steplessly without replacing mechanical parts.

[0050] The other end of the threaded tube 13 is equipped with a screening assembly for separating rice seeds of different sizes. The screening assembly includes a recovery chamber 7 welded to the outer wall of the seed dispensing tube 3. The recovery chamber 7 has a recovery port that is laterally connected to the spiral path at the bottom of the threaded tube 13 near the second outlet. The recovery port is bonded to a first filter screen for filtering full rice seeds. The air blowing tube 10, the spiral path at the bottom of the threaded tube 13, and the recovery port form a mutually connected passage. Airflow enters the recovery chamber 7 through the air blowing tube 10. The pore size of the first filter screen is smaller than the average particle size of full rice seeds. Since light rice seeds (including immature rice seeds and underdeveloped rice seeds) and mixed rice husks weigh less than full rice seeds, when pushed by the airflow from the air blowing tube 10, the light rice seeds pass through the first filter screen and enter the recovery chamber 7, while the full rice seeds continue to slide to the outlet of the seed dispensing tube 3 due to gravity. In addition, the first filter screen also prevents the full rice seeds from being blown into the recovery chamber 7 by the high-speed airflow.

[0051] A second filter screen for filtering rice seeds and rice husks of different specifications is bonded to the bottom of the recovery chamber 7. A discharge component for draining backflow water in the ditch during sowing is provided below the recovery chamber 7. The discharge component includes an exhaust pipe 8 symmetrically arranged at the bottom of the second filter screen. The aperture of the second filter screen is smaller than that of the first filter screen, so that small-particle lightweight rice seeds are blocked by the second filter screen after passing through the first filter screen into the recovery chamber 7 and will not continue to fall, while the air flow enters the exhaust pipe 8 through the gaps in the filter screen.

[0052] The outer wall of the exhaust pipe 8 is connected to the outer wall of the seeding pipe 3 by a clamp, and a nozzle 9 is provided at the bottom of the exhaust pipe 8. During the sowing process of rice seeds in the paddy field, the seeder first digs a furrow and then sows the seeds. The water flow after the furrowing will flow back into the furrow. At this time, the rice seeds sown by the seeding pipe 3 located behind the seeder will be washed away by the backflowing water flow, which reduces the contact rate between the rice seeds and the soil, thereby reducing the sowing rate. Therefore, the airflow discharged from the nozzle 9 can blow the backflow water on both sides of the seeding pipe 3 in the opposite direction, and temporarily form a temporary waterless area with a diameter of about 5 to 10 cm on both sides of the seeding pipe 3, ensuring that the full rice seeds directly contact the soil after being discharged from the seeding pipe 3 to the waterless area, thereby increasing the mud deposition rate of the rice seeds. At the same time, since the seeder is always in the process of moving forward, the nozzle 9 continuously sprays airflow, so that the influence of the airflow on the water flow is continuously relaxed until it leaves the current water area, and the water flow will not rapidly flow back into the furrow and wash the rice seeds due to the sudden disappearance of the airflow. The diameter of the top end of the exhaust pipe 8 is larger than the diameter at the nozzle 9, and the end of the exhaust pipe 8 close to the nozzle 9 is arc-shaped. The angle between the arc section of the exhaust pipe 8 and the seed discharging tube 3 is 30°, and the nozzle 9 is flat-mouthed. Since the diameter of the top end of the exhaust pipe 8 tends to decrease on the path to the nozzle 9, based on the Venturi effect, the airflow velocity increases when passing through the exhaust pipe 8, increasing the impact force of the backflow water in the drainage ditch. At the same time, the local low-pressure area formed by the rapid airflow when blowing away the water surface can suppress water flow disturbance and reduce the probability of seeds drifting with the water flow, thereby meeting the requirements of precision seeding.

[0053] Example 2:

[0054] As attached Figure 2 and Figure 4As shown, the difference from Example 1 is that three adjacent adsorption holes 11 are provided every 30° on the sowing disk 5, the aperture of the adsorption hole 11 is 1.2-1.8 mm, the depth of the adsorption hole 11 is 2-3 mm, and the three adjacent adsorption holes 11 are distributed in a triangle, and each adsorption hole 11 is connected to the negative pressure suction machine 4. The negative pressure suction machine 4 can adsorb the rice seeds in the seed box 1 into the adsorption hole 11 through the adsorption hole 11, and each adsorption hole 11 can adsorb 1 rice seed. Since it is generally required to sow 1-3 rice seeds per hole when sowing rice seeds to improve the emergence rate, the three-hole adsorption design is used to ensure that the amount of rice seeds sown each time meets the agronomic requirements. At the same time, the rice seeds need to be sorted by air flow for light rice seeds during sowing. Therefore, 3 rice seeds are put into the seed pipe 3 at the same time each time, which can reduce the probability of being sorted, and try to ensure that there is at least 1 rice seed sown in each hole, reducing the hole rate.

[0055] Example 3:

[0056] As attached Figure 2 As shown, the difference from Example 2 is that a first photoelectric sensor 12 and a second photoelectric sensor 14 are respectively bonded to the side walls of the seeding tube 3 near the top and bottom ends of the threaded tube 13, and the first photoelectric sensor 12 and the second photoelectric sensor 14 are both connected to the controller signal.

[0057] The specific implementation process is as follows: When rice seeds fall from the sowing tray 5 into the seeding tube 3, the total number of rice seeds N is recorded by the first photoelectric sensor 12 before entering the threaded tube 13. 总 After passing through the threaded tube 13, the rice seeds are sorted by the airflow of the air blowing tube 10. The full rice seeds continue to fall from the seed discharging tube 3. When they pass through the second photoelectric sensor 14, the number of full rice seeds N that pass through is recorded. 播种 , the controller receives N 总 and N 播种 The data is used to calculate the seeding rate in real time. The seeding rate calculation formula is:

[0058]

[0059] If the seeding rate falls below a set threshold, assuming the threshold is 90%, the controller reduces the blowing intensity of the air pump 6 to reduce the sowing speed and improve the sorting effect. The sowing rate data is combined with GPS positioning information to generate a sowing map, marking low-efficiency areas (such as <85%) for subsequent replanting, reducing missed sowing losses. In addition, if the sowing rate is still far below the set threshold (such as <75%) after increasing the blowing intensity of the air pump 6, the controller will alarm the operator to check the equipment status to detect whether the threaded tube 13 and the seed discharge tube 3 are blocked. In addition, by recording the sowing rate data over a long period of time, the batch quality of rice seeds can be evaluated.

[0060] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A hybrid rice precision seeding device, comprising a seeding machine, a support (2) fixedly connected to the bottom of the seeding machine, a servo motor provided on one side of the support (2), the servo motor signal being connected to a controller, an output shaft of the servo motor being coaxially fixedly connected to a rotating shaft, the rotating shaft being rotatably connected to the support (2), characterized in that: A housing (15) is fixedly connected to the support (2), a seeding tray (5) for adsorbing and transporting rice seeds by negative pressure is rotatably connected inside the housing (15), the seeding tray (5) is coaxially fixedly connected to the rotating shaft, a negative pressure aspirator (4) is provided on one side of the housing (15), the negative pressure aspirator (4) is connected to a controller signal, a seed box (1) is fixedly connected to the other side of the housing (15), and a closed seed cavity is formed between the housing (15) and the seed box (1); A seed box (1) is provided with a seed discharging assembly for discharging rice seeds on one side, a channel assembly for slowing down the falling speed of the rice seeds and assisting in screening rice seeds of different specifications is provided in the seed discharging assembly, an air blowing assembly for preventing the rice seeds from accumulating in the channel assembly is provided at one end close to the bottom of the channel assembly, a screening assembly for separating rice seeds of different specifications is provided at the other end of the bottom of the channel assembly, the screening assembly, the bottom end of the channel assembly and the air blowing assembly form a passage communicating with each other, gas enters the screening assembly through the air blowing assembly, and a discharge assembly for discharging backflow water in the ditch during sowing is provided below the screening assembly; The seeding assembly comprises a seeding tube (3) fixedly connected between a seed box (1) and a seeding plate (5); the interior of the seeding tube (3) is communicated with a seed cavity; the top end of the seeding tube (3) is located in the motion track of the rotation of the seeding plate (5); the bottom end of the seeding tube (3) extends to the bottom of the support (2) and is communicated with the outside of the support (2); The channel assembly comprises a threaded tube (13) fixedly connected to the channel of the seed discharging tube (3); the top and bottom ends of the threaded tube (13) are respectively provided with a first outlet and a second outlet communicating with the seed discharging path of the seed discharging tube (3); the rice seeds fall from the seed discharging tube (3) to the first outlet and slide through the spiral path of the threaded tube (13) to the second outlet; The screening assembly comprises a recovery chamber (7) fixedly connected to the outer wall of the seed discharging tube (3), a recovery port being opened on the recovery chamber (7), the recovery port being laterally connected to the spiral path at the bottom end of the threaded tube (13) near the second outlet, and a first filter screen for filtering full rice seeds being fixedly connected to the recovery port; A second filter screen for filtering rice seeds and rice husks of different specifications is fixedly connected to the bottom of the recovery chamber (7); The discharge assembly comprises an exhaust pipe (8) symmetrically arranged at the bottom of the second filter screen, the outer wall of the exhaust pipe (8) is fixedly connected to the outer wall of the seed discharging pipe (3), the bottom end of the exhaust pipe (8) is provided with a nozzle (9), the top diameter of the exhaust pipe (8) is larger than the diameter of the nozzle (9), and the end of the exhaust pipe (8) close to the nozzle (9) is arc-shaped, and the nozzle (9) is flat.

2. The hybrid rice precision seeding device according to claim 1, characterized in that: Three adjacent adsorption holes (11) are arranged every 30 degrees on the seeding plate (5).

3. The hybrid rice precision seeding device according to claim 2, characterized in that: A weight sensor is provided on the inner bottom wall of the seed box (1), and the weight sensor is connected to the controller signal.

4. The hybrid rice precision seeding device according to claim 3, characterized in that: The air blowing assembly comprises an air blowing pipe (10) and an air pump (6), wherein the air pump (6) is located on a side close to the negative pressure suction machine (4) and is fixedly connected to the support (2), the air pump (6) is connected to a controller signal, one end of the air blowing pipe (10) is connected to the output port of the air pump (6), and the other end of the air blowing pipe (10) is connected to the spiral path at the bottom end of the threaded pipe (13) away from the second outlet, and the air flow direction of the air blowing pipe (10) is consistent with the tangential direction of the spiral path.

5. The hybrid rice precision seeding device according to claim 4, characterized in that: A first photoelectric sensor (12) and a second photoelectric sensor (14) are fixedly connected to the side walls of the seeding tube (3) near the top and bottom ends of the threaded tube (13), respectively. The first photoelectric sensor (12) and the second photoelectric sensor (14) are both connected to the controller signal.

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