Precise sowing device for hybrid rice

Abstract

The invention relates to the technical field of agricultural machinery, in particular to a hybrid rice precision seeding device which comprises a seeding machine, a support is fixedly connected to the bottom of the seeding machine, a shell is fixedly connected to the support, a seeding disc is rotatably connected into the shell, and a seed box is fixedly connected to the other side of the shell; a seed discharging assembly used for discharging rice seeds is arranged on one side of the seed box, a channel assembly used for slowing down the falling speed of the rice seeds and assisting in screening the rice seeds of different specifications is arranged in the seed discharging assembly, and an air blowing assembly used for preventing the rice seeds from being stacked in the channel assembly is arranged at the end close to the bottom of the channel assembly. A screening assembly for separating rice seeds of different specifications is arranged at the other end of the bottom of the channel assembly, and a discharging assembly for discharging backflow water in furrows during sowing is arranged below the screening assembly. When rice seeds are sorted through airflow of the air blowing assembly, backflow water generated during ditching is blown out through the airflow, the probability that the seeds drift along with water flow is reduced, and then the precision seeding requirement is met.

Description

Technical Field

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

[0002] Hybrid rice usually has characteristics such as high yield, good quality, and strong stress resistance, so it is widely used in agricultural production. However, due to its relatively high production cost, the seed price of hybrid rice is generally higher than that of ordinary rice seeds. In order to reduce production costs and improve economic benefits, precise seeding can ensure that each seed can obtain sufficient growth space and nutrients, thereby increasing the germination rate and survival rate of the seeds. This is of great significance for improving the yield and quality of hybrid rice. However, when directly performing precise seeding in paddy fields, hybrid rice is prone to encounter some problems.

[0003] Firstly, the soil conditions in paddy fields are complex and variable. When sowing in paddy fields, it is usually necessary to dig trenches to sow rice seeds into the soil. However, after the rice seeds are sown by the seeding machine, the water in the trenches is likely to flow back into the trenches. The rice seeds pneumatically sprayed from the bottom support of the seeding machine are easily affected by water flow scouring and uneven soil covering, resulting in the rice seeds being unable to closely combine with the soil and take root. Moreover, the traditional vertical design of the seed discharging pipe leads to too high an initial velocity of the seeds, exacerbating the offset caused by water flow scouring. 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 seeding device cannot completely and accurately remove all unqualified seeds, resulting in a high hole rate. This will not only waste land resources but also may 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 precise seeding device for hybrid rice. While sorting the rice seeds through the airflow of the blowing component, the airflow is used to blow away the backflow water during trench digging, reducing the probability of the seeds drifting with the water flow, and thus meeting the requirements of precise seeding.

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

[0006] On one side of the seed box, there is a seed discharging component for discharging rice seeds. Inside the seed discharging component, there is a channel component for slowing down the falling speed of the rice seeds and assisting in screening rice seeds of different specifications. At one end near the bottom of the channel component, there is a blowing component for preventing the rice seeds from accumulating in the channel component. At the other end of the bottom of the channel component, there is a screening component for separating rice seeds of different specifications. The screening component, the bottom end of the channel component, and the blowing component form a mutually connected passage. Gas enters the screening component through the blowing component. Below the screening component, there is a discharging component for discharging the backflow water in the furrow during sowing.

[0007] The technical principle of the above solution is as follows:

[0008] By adding rice seeds into the seed box, the controller starts the servo motor and the negative pressure aspirator respectively. While the servo motor drives the sowing disk to rotate, the negative pressure aspirator generates negative pressure and adsorbs the rice seeds to the sowing disk, and conveys the rice seeds into the seed discharging component. The falling speed of the rice seeds is slowed down by the channel component. The blowing component blows air laterally at the bottom of the channel component. Different specifications of rice seeds are separated by the screening component. Among them, the light-weight rice seeds are blown into the screening component, while the plump rice seeds with a weight greater than that of the light-weight rice seeds continue to fall in the seed discharging component and are sown in the field. During the continuous blowing of the air flow in the blowing component, the air enters the discharging component through the screening component, and the gas is blown out through the discharging component to disperse the backflow water in the furrow during sowing, forming a temporarily waterless area to ensure that the plump rice seeds sink into the soil for cultivation.

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

[0010] 1. In this solution, through negative pressure adsorption and the precise rotation of the sowing disk, the precise placement of rice seeds can be achieved, ensuring that each rice seed can be sown at a predetermined position and spacing, improving the uniformity and efficiency of sowing.

[0011] 2. In this solution, through the cooperation of the blowing component and the screening component, different specifications of rice seeds can be effectively separated, ensuring that only plump and healthy rice seeds are sown, improving the emergence rate of seeds and the yield of crops. The design of the channel component can slow down the falling speed of the rice seeds, avoid damage to the rice seeds due to too fast falling speed, and also contribute to the screening of light-weight rice seeds.

[0012] 3. In this solution, the design of the discharging component can discharge the backflow water in the furrow during sowing, forming a temporarily waterless area to ensure that the rice seeds can sink smoothly into the soil, avoiding the displacement or loss of seeds caused by water flow scouring.

[0013] Furthermore, there are three adjacent adsorption holes on the sowing disk at every 30°.

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

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

[0016] Beneficial effects: The weight sensor can detect the weight of the rice seeds in the seed box in real time and transmit the data to the controller. Operators can understand the remaining amount of rice seeds at any time through the controller, so as to replenish the rice seeds in time and avoid interruption caused by insufficient rice seeds during seeding.

[0017] Furthermore, the seed metering assembly includes a seed metering pipe fixedly connected between the seed box and the seeding tray. The inside of the seed metering pipe is communicated with the seed cavity. The top end of the seed metering pipe is located in the movement track of the rotation of the seeding tray, and the bottom end of the seed metering pipe extends to the bottom of the support and is communicated with the outside of the support.

[0018] Beneficial effects: Since the top end of the seed metering pipe is located in the movement track of the rotation of the seeding tray, when the seeding tray adsorbs the rice seeds and rotates above the seed metering pipe, the rice seeds can accurately fall into the seed metering pipe, ensuring the smoothness of the rice seeds during transportation through the transportation of the seed metering pipe.

[0019] Furthermore, the channel assembly includes a threaded pipe fixedly connected inside the channel of the seed metering pipe. The top end and the bottom end of the threaded pipe are respectively provided with a first outlet and a second outlet communicating with the seed metering path of the seed metering pipe. The rice seeds fall from the seed metering pipe to the first outlet and slide to the second outlet through the spiral path of the threaded pipe.

[0020] Beneficial effects: 1. The spiral path of the threaded pipe 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 problems of accumulation or scattering caused by too fast speed.

[0021] 2. The spiral path of the threaded pipe extends the movement track of the rice seeds, uses the friction between the rice seeds and the threaded pipe to reduce the falling speed, ensures that the rice seeds are discharged one by one and evenly, and the rice seeds are naturally dispersed when sliding in the spiral path of the threaded pipe, avoiding falling in groups and improving the consistency of the seeding row spacing.

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

[0023] Beneficial effects: When the rice seeds slide to the bottom of the screw tube, the air blowing pipe blows air into the spiral path, which can blow the light rice seeds into the screening component to separate the light rice seeds from the plump rice seeds, improving the emergence rate. Moreover, the air flow forms local turbulence at the bottom of the screw tube, taking away part of the moisture in the seed discharging pipe and avoiding the seeding jamming caused by the accumulation of plump rice seeds. In addition, by adjusting the blowing intensity of the air pump through the controller, the sliding speed of the plump rice seeds in the screw tube can be indirectly controlled, and the seeding density can be adjusted steplessly without replacing mechanical components.

[0024] Furthermore, the screening component includes a recovery cavity fixedly connected to the outer side wall of the seed discharging pipe. A recovery port is opened on the recovery cavity, and the recovery port is laterally communicated with the spiral path near the second outlet at the bottom of the screw tube. A first filter screen for filtering plump rice seeds is fixedly connected to the recovery port.

[0025] Beneficial effects: The function of the first filter screen is to filter the rice seeds entering the recovery cavity to ensure that only plump and healthy rice seeds are retained in the seed discharging pipe. Using plump and healthy rice seeds for seeding helps to improve the germination rate and growth quality of crops. While impurities, damaged or empty light rice seeds are filtered into the recovery cavity, and the light rice seeds in the recovery cavity can be reused after further cleaning and treatment, which not only reduces the waste of rice seeds but also improves the utilization rate of rice seeds.

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

[0027] Beneficial effects: Through the second filter screen, the light rice seeds will not continue to fall after entering the recovery cavity, while the air flow enters the discharge component through the filter screen gaps to drain the backwater in the ditch.

[0028] Furthermore, the discharge component includes exhaust pipes symmetrically arranged at the bottom of the second filter screen. The outer side walls of the exhaust pipes are fixedly connected to the outer side wall of the seed discharging pipe. Nozzles are opened at the bottom ends of the exhaust pipes. The diameter of the top ends of the exhaust pipes is larger than the diameter at the nozzle part, and one ends of the exhaust pipes close to the nozzles are arc-shaped, and the nozzles are flat-mouth-shaped.

[0029] Beneficial effects: The air flow discharged from the nozzles can blow open the backwater in the seeding ditch, forming a temporary water-free area on both sides of the seed discharging pipe, ensuring that the plump rice seeds directly contact the soil after being discharged from the seed discharging pipe to the water-free area, improving the sedimentation rate. Since the inner diameter of the exhaust pipe gradually decreases, based on the Venturi effect, the air flow velocity increases when the air flow passes through the exhaust pipe, increasing the impact force of discharging the backwater in the ditch. At the same time, the local low-pressure area formed by the fast air flow when blowing the water surface can inhibit the water flow disturbance and reduce the probability of the seeds 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, and both the first photoelectric sensor and the second photoelectric sensor are 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 inefficient areas are marked by the sowing rate data, 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 given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an axonometric schematic diagram of an embodiment of a hybrid rice precision seeding device of 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 It is a schematic diagram of the axonometric measurement of a threaded tube of an embodiment of a hybrid rice precision seeding device of the present invention;

[0036] Figure 4 It is a disassembled axonometric view of a seeding plate 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 from another perspective of the seed box of the 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 plate; 6. air pump; 7. recovery chamber; 8. exhaust pipe; 9. nozzle; 10. air blow pipe; 11. adsorption hole; 12. first photoelectric sensor; 13. threaded tube; 14. second photoelectric sensor; 15. shell. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] The following is a further detailed description through specific embodiments:

[0043] Embodiment 1:

[0044] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 : A precise seeding device for hybrid rice includes a seeder. A support 2 is welded to the bottom of the seeder. A servo motor is screw - connected to one side of the support 2. The servo motor is signal - connected to a controller. The output shaft of the servo motor is coaxially and bearing - connected to a rotating shaft. The rotating shaft is rotationally connected to the support 2. A housing 15 is welded to the support 2. Inside the housing 15, a seeding disk 5 for sucking and conveying rice seeds by negative pressure is rotationally connected. The seeding disk 5 is coaxially and bearing - connected to the rotating shaft. A negative - pressure air - suction machine 4 is screw - connected to one side of the housing 15. The negative - pressure air - suction machine 4 is signal - connected to the controller.

[0045] On the other side of the housing 15, a seed box 1 is bolt - connected. A closed seed cavity is formed between the housing 15 and the seed box 1. A weight sensor is screw - connected to the inner bottom wall of the seed box 1. The weight sensor is signal - connected to the controller. Before sowing, rice seeds are poured into the seed box 1. The weight sensor at the bottom of the seed box 1 real - time monitors the remaining amount of rice seeds in the seed box 1. When the rice seeds are loaded to the load threshold of the seed box 1 or when the remaining amount of rice seeds in the seed box 1 is lower than the threshold, an alarm will be triggered through the controller to stop adding seeds or to carry out supplementary seeding. At the same time, the weight sensor is also used to transmit the weight of the rice seeds before sowing and after sowing to the controller.

[0046] During the seeding process, the servo motor is started by the controller, and the seeding tray 5 rotates uniformly along with the rotating shaft. At the same time, the controller starts the negative pressure aspirator 4 to adsorb the rice seeds in the seed box 1 onto the seeding tray 5, and they rotate along with the seeding tray 5.

[0047] On one side of the seed box 1, there is a seed discharging assembly for discharging rice seeds. The seed discharging assembly includes a seed discharging pipe 3 integrally formed between the seed box 1 and the seeding tray 5. The inside of the seed discharging pipe 3 is communicated with the seed cavity. The top end of the seed discharging pipe 3 is located in the movement track of the rotation of the seeding tray 5. When the seeding tray 5 adsorbing rice seeds rotates above the seed discharging pipe 3, the negative pressure is released, and the rice seeds fall into the seed discharging pipe 3. The bottom end of the seed discharging pipe 3 extends to the bottom of the support 2 and is communicated with the outside of the support 2.

[0048] Under conventional techniques, the vertical setting of the seed discharging pipe 3 makes the free-fall speed of the rice seeds relatively fast, which easily leads to uneven seeding density, resulting in multiple rice seeds piling up in each hole in the paddy field or the rice seeds in the hole being too sparse. This situation is more obvious especially during high-speed seeding. Therefore, 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 pipe 3. The channel assembly includes a threaded pipe 13 welded in the channel of the seed discharging pipe 3. The top end and the bottom end of the threaded pipe 13 are respectively provided with a first outlet and a second outlet communicating with the seed discharging path of the seed discharging pipe 3. The rice seeds fall from the seed discharging pipe 3 to the first outlet and slide down along the spiral path of the threaded pipe 13 to the second outlet. The spiral path of the threaded pipe 13 prolongs the movement track of the rice seeds, uses the frictional force between the rice seeds and the threaded pipe 13 to reduce the falling speed, ensures that the rice seeds are discharged one by one and evenly, and the rice seeds are naturally dispersed when sliding in the spiral path of the threaded pipe 13, avoiding falling in a group, improving the consistency of the seeding row spacing, and thus achieving the purpose of precise seeding; at the same time, during the direct seeding process in the paddy field, the vertically falling rice seeds may deviate from the target seeding position due to the splashing of the mud or the disturbance of the water flow in the paddy field. Therefore, the spiral path of the threaded pipe 13 can slow down the falling speed of the rice seeds, reduce the initial speed of the rice seeds when they reach the second outlet, and then it is easier to sink into the mud when discharged from the seed discharging pipe 3.

[0049] One end near the bottom of the seed metering tube 3 is provided with a blowing assembly for preventing rice seeds from accumulating on the spiral path of the threaded tube 13. The blowing assembly includes a blow 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 screw-connected to the support 2. The air pump 6 is signal-connected to the controller. One end of the blow pipe 10 is communicated with the output port of the air pump 6, and the other end of the blow pipe 10 is laterally communicated with the spiral path at the bottom end of the threaded tube 13 away from the second outlet, and the air flow direction of the blow pipe 10 is consistent with the tangent direction of the spiral path. Since the seed metering tube 3 is easily affected by the humid environment when directly sowing rice seeds in paddy fields, and when the humidity of the rice seeds is relatively high, it is easy to be blocked at the second outlet of the threaded tube 13. Therefore, the air pump 6 is started to blow air through the controller. The air flow of the blow pipe 10 forms local turbulence at the bottom of the threaded tube 13, taking away a part of the moisture in the seed metering tube 3, avoiding the sowing jamming caused by the accumulation of plump rice seeds. At the same time, the air flow pushes the plump rice seeds to slide closely along the outer wall of the threaded tube 13, using the centrifugal force to keep them arranged in an orderly manner, reducing the sowing deviation caused by mutual collision, and further achieving the purpose of precise sowing. In addition, by adjusting the blowing intensity of the air pump 6 through the controller, the sliding speed of the plump rice seeds in the threaded tube 13 can be indirectly controlled. When the sowing amount per unit area needs to be reduced, a low-speed air flow can prolong the residence time of the rice seeds at the bottom of the threaded tube 13, and the blowing intensity of the low-speed air flow is always greater than the weight of the light-quality rice seeds preset by the controller; when the sowing amount per unit area needs to be increased, a high-speed air flow is used to make the rice seeds quickly pass through the second outlet of the threaded tube 13, achieving stepless adjustment of the sowing density without replacing mechanical components.

[0050] The other end at the bottom of the threaded tube 13 is provided with a screening assembly for separating rice seeds of different specifications. The screening assembly includes a recovery chamber 7 welded to the outer wall of the seed metering tube 3. A recovery port is opened on the recovery chamber 7, and the recovery port is laterally communicated with the spiral path at the bottom end of the threaded tube 13 near the second outlet. A first filter screen for filtering plump rice seeds is adhered to the recovery port. The blow pipe 10, the spiral path at the bottom end of the threaded tube 13, and the recovery port form a mutually communicated passage. The air flow enters the recovery chamber 7 through the blow pipe 10. The pore diameter of the first filter screen is smaller than the average particle diameter of the plump rice seeds. And since the light-quality rice seeds (including immature rice seeds and underdeveloped plump rice seeds) and the mixed rice husks have a mass smaller than that of the plump rice seeds, therefore, when pushed by the air flow of the blow pipe 10, the light-quality rice seeds will pass through the first filter screen and enter the recovery chamber 7, while the plump rice seeds continue to slide down to the outlet of the seed metering tube 3 due to gravity. In addition, the first filter screen also plays a role in preventing the plump rice seeds from being blown into the recovery chamber 7 by the high-speed air flow.

[0051] A second filter screen for filtering rice seeds and rice husks of different specifications is adhesively attached to the bottom of the recovery chamber 7. Below the recovery chamber 7, there is a discharge assembly for discharging the backflow water in the furrow during sowing. The discharge assembly includes exhaust pipes 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-sized lightweight rice seeds are blocked by the second filter screen after passing through the first filter screen and entering the recovery chamber 7 and will not continue to fall, while the air flow enters the exhaust pipes 8 through the gaps in the filter screen.

[0052] The outer side walls of the exhaust pipes 8 are all clamped and connected to the outer side walls of the seed metering tubes 3. Nozzles 9 are opened at the bottom ends of the exhaust pipes 8. During the process of paddy field sowing, when the seeder advances, it first opens a furrow and then sows seeds. The water flow in the furrow will flow back into the furrow after the furrow is opened. At this time, the rice seeds sown by the seed metering tubes 3 behind the seeder will be washed by the flowing back water, reducing the contact rate between the rice seeds and the soil, and thus resulting in a decrease in the sowing rate. Therefore, the air flow discharged from the nozzles 9 can blow the backflow water on both sides of the seed metering tubes 3 in the reverse direction, temporarily forming a temporary water-free area with a diameter of about 5 - 10 cm on both sides of the seed metering tubes 3, ensuring that the plump rice seeds directly contact the soil after being discharged from the seed metering tubes 3 to the water-free area, improving the sedimentation rate of the rice seeds. At the same time, since the seeder is always moving forward, and the nozzles 9 continuously eject air flow, the influence of the air flow on the water flow shows a continuous relaxation until leaving the current water area, and the water flow will not rush back to the furrow to wash the rice seeds suddenly due to the sudden disappearance of the air flow. The diameter of the top end of the exhaust pipes 8 is larger than the diameter at the nozzles 9, and one end of the exhaust pipes 8 close to the nozzles 9 is arc-shaped. The included angle between the arc section of the exhaust pipes 8 and the seed metering tubes 3 is 30°. The nozzles 9 are flat-mouthed. Since the diameter of the top end of the exhaust pipes 8 tends to decrease on the path to the nozzles 9, based on the Venturi effect, the air flow velocity increases when the air flow passes through the exhaust pipes 8, increasing the impact force of discharging the backflow water in the furrow. At the same time, the local low-pressure area formed by the fast air flow when blowing open the water surface can inhibit the water flow disturbance, reducing the probability of the seeds drifting with the water flow, thus meeting the requirements of precise sowing.

[0053] Example 2:

[0054] As shown in the appendix Figure 2 and Figure 4As shown in the figure, the difference from Embodiment 1 is that three adjacent adsorption holes 11 are provided on the seeding tray 5 at every 30°. The aperture of the adsorption hole 11 is 1.2 - 1.8 mm, and the depth of the adsorption hole 11 is 2 - 3 mm. The three adjacent adsorption holes 11 are distributed in a triangular shape, and each adsorption hole 11 is communicated with the negative pressure air suction machine 4. The negative pressure air 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 generally 1 - 3 rice seeds are required to be sown per hole during rice seeding to improve the emergence rate, therefore, through the three - hole adsorption design, it is ensured that the amount of rice seeds sown each time meets the agronomic requirements. At the same time, when the rice seeds are sown, they need to be sorted by air flow to separate the light rice seeds. Therefore, putting 3 rice seeds into the seed - discharging pipe 3 at the same time each time can reduce the probability of being sorted, and try to ensure that there is at least 1 rice seed sown per hole, reducing the hole - empty rate.

[0055] Embodiment 3:

[0056] As shown in the attached Figure 2 figure, the difference from Embodiment 2 is that a first photoelectric sensor 12 and a second photoelectric sensor 14 are respectively bonded to the side walls of the seed - discharging pipe 3 near the top and bottom of the threaded pipe 13. The first photoelectric sensor 12 and the second photoelectric sensor 14 are both connected to the controller in signal.

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

[0058]

[0059] If the seeding rate is lower than the set threshold, assuming the threshold is 90%, the controller reduces the blowing intensity of the air pump 6 to reduce the seeding speed and improve the sorting effect. The seeding rate data is combined with the GPS positioning information to generate a seeding map, marking the low - efficiency areas (such as <85%) for subsequent reseeding to reduce the loss of missed seeding. In addition, if the seeding rate is still much lower than the set threshold (such as <75%) after increasing the blowing intensity of the air pump 6, the controller alarms to prompt the operator to check the equipment status to detect whether the threaded pipe 13 and the seed - discharging pipe 3 are blocked. In addition, by recording the seeding rate data for a long time, the batch quality of the rice seeds can be evaluated.

[0060] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to exhaustively list all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of this invention.

Claims

1. A hybrid rice precision seeding device, comprising a seeding machine, a support (2) is fixedly connected to the bottom of the seeding machine, a servo motor is arranged on one side of the support (2), the servo motor signal is connected to a controller, the output shaft of the servo motor is coaxially fixedly connected to a rotating shaft, and the rotating shaft is rotatably connected to the support (2), characterized in that: The support (2) is fixedly connected with a housing (15), a seeding plate (5) for adsorbing and transporting rice seeds by negative pressure is rotatably connected inside the housing (15), the seeding plate (5) is coaxially fixedly connected with the rotating shaft, a negative pressure suction machine (4) is provided on one side of the housing (15), the negative pressure suction machine (4) is connected to the 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 discharging assembly for discharging rice seeds is provided on one side of the seed box (1), 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 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 blowing assembly form a passage connected to each other, gas enters the screening assembly through the blowing assembly, and a discharge assembly for discharging backflow water in the ditch during sowing is provided below the screening assembly.

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 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 rotation track of the seeding plate (5); the bottom end of the seeding tube (3) extends to the bottom of a support (2) and is communicated with the outside of the support (2).

5. The hybrid rice precision seeding device according to claim 4, characterized in that: 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 connected to 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 to the second outlet through the spiral path of the threaded tube (13).

6. The hybrid rice precision seeding device according to claim 5, characterized in that: The 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 an output port of the air pump (6), and the other end of the air blowing pipe (10) is connected to a spiral path at the bottom end of the threaded tube (13) away from the second outlet, and the airflow direction of the air blowing pipe (10) is consistent with the tangent direction of the spiral path.

7. The hybrid rice precision seeding device according to claim 6, characterized in that: The screening component comprises a recovery chamber (7) fixedly connected to the outer wall of the seed discharging tube (3), a recovery port is formed on the recovery chamber (7), the recovery port is 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 is fixedly connected to the recovery port.

8. The hybrid rice precision seeding device according to claim 7, characterized in that: 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).

9. The hybrid rice precision seeding device according to claim 8, characterized in that: 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.

10. The hybrid rice precision seeding device according to claim 9, 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. Both the first photoelectric sensor (12) and the second photoelectric sensor (14) are connected to the controller signal.

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