Double-station seeding device and whole-disk air-suction type rice precision seedling raising and seeding flow line

Abstract

The application provides a double-station seeding device and a whole-disk air-suction type rice precision seedling raising and seeding flow line, which comprises a transverse automatic disk feeding device, a soil laying device, a double-station high-efficiency seeding device, a seed adding device, a water spraying device and a transverse automatic disk stacking device; the soil laying device comprises a bottom soil laying device and a surface soil laying device; the transverse automatic disk feeding device, the bottom soil laying device, the double-station high-efficiency seeding device, the water spraying device, the surface soil laying device and the transverse automatic disk stacking device are arranged in sequence along the operation direction of the flow line; the double-station high-efficiency seeding mode is adopted, and the transverse automatic disk feeding device, the seed adding device, the transverse automatic disk stacking device and the automatic soil screening and adding integrated device are matched, so that the work efficiency bottleneck of the rice precision seedling raising and seeding flow line is broken. The work efficiency and the seeding precision of the whole-disk air-suction type rice precision seedling raising and seeding flow line can be effectively improved.

Description

Technical Field

[0001] This invention belongs to the field of rice sowing technology, specifically relating to a dual-station sowing device and a whole-tray air-suction rice precision seedling raising and sowing production line. Background Technology

[0002] Factory-style rice seedling raising technology can cultivate high-quality rice seedlings, shorten the seedling raising cycle, and improve seedling survival rate and quality. Precision rice seedling raising and sowing equipment is the most crucial step in realizing factory-style rice seedling raising. Currently, precision rice seedling raising and sowing devices mainly include mechanical seed metering devices with external grooved wheels, internal grooved wheels, or seed-hole wheels. Although all can complete the sowing process, the sowing quality is poor and the seed damage rate is high, thus affecting the quality of seedlings. Therefore, as disclosed in CN102550180A, a field-type air-suction vibrating disc precision seeder for seedling raising has been provided, and a whole-disc air-suction precision seedling raising and sowing device has been developed, effectively improving sowing efficiency and uniformity. However, this device is only suitable for field seedling raising and cannot provide high-efficiency, high-precision sowing equipment support for centralized factory-style seedling raising.

[0003] The seeding efficiency of most seedling raising and sowing assembly lines currently widely used in the market is between 500 and 800 trays per hour, which is insufficient to meet the needs of large-scale seedling raising and sowing in mechanized rice cultivation in terms of both efficiency and precision. Summary of the Invention

[0004] To address the aforementioned technical problems, one objective of this invention is to provide a dual-station seeding device with a simple and compact structure, fast response speed, and the ability to achieve efficient alternating seeding at two stations, thereby improving its working efficiency.

[0005] One objective of this invention is to provide a tray-type air-suction precision rice seedling raising and sowing production line including the aforementioned dual-station sowing device. This line employs a dual-station high-efficiency sowing method, combined with a transverse automatic tray feeding device, a seed adding device, a transverse automatic tray stacking device, and an integrated automatic soil sieving and adding device, thereby overcoming the bottleneck in the working efficiency of precision rice seedling raising and sowing production lines. It can effectively improve the working efficiency and sowing accuracy of tray-type air-suction precision rice seedling raising and sowing production lines.

[0006] Note that the description of these objectives does not preclude the existence of other objectives. One aspect of the invention does not require achieving all of the above objectives. Objectives other than those described above can be extracted from the description, drawings, and claims.

[0007] The present invention achieves the above-mentioned technical objectives through the following technical means.

[0008] A dual-station seeding device includes a dual-station high-efficiency seeding device; the dual-station high-efficiency seeding device includes a seed suction plate, a vibrating seed removal plate, an air pressure switching device, and a dual-station frame;

[0009] The dual-station frame is arranged sequentially from front to back as a front station, a seedling tray sowing position, and a rear station. Slide rails are provided on both sides of the dual-station frame. There are two sets of vibrating seed removal trays, installed at the front and rear stations of the dual-station frame, respectively. There are also two sets of seed suction trays, installed at the front and rear stations of the dual-station frame, respectively, and positioned above the vibrating seed removal trays. The two sets of seed suction trays can reciprocate linearly along the slide rails on the dual-station frame between the front and rear stations. The air pressure switching device is connected to both sets of seed suction trays to switch the air pressure state of the seed suction trays, allowing the seed suction trays at the front and rear stations to alternately perform seed suction and sowing operations.

[0010] In the above scheme, the seed suction tray includes an air chamber, a seed suction plate, a suction needle, a first pulley, and a first cylinder; each air chamber is provided with two air inlets; the seed suction plate is installed at the bottom of the air chamber; the suction needle is installed on the mounting hole of the seed suction plate; the first pulley is installed on both sides of the air chamber and slides in cooperation with the slide rail on the double-station frame; the fixed end of the first cylinder is hinged to the double-station frame, and the piston rod end is hinged to the air chamber; the air chamber, driven by the extension and retraction of the piston rod of the first cylinder, reciprocates linearly along the slide rail on the double-station frame at the front station-seedling tray sowing position and the rear station-seedling tray sowing position, respectively, to alternately perform seed suction and sowing operations.

[0011] Furthermore, a fixing plate is provided on both sides of the air chamber; a groove is formed between the bottom of the fixing plate and the air chamber, the seed suction plate slides in along the groove and is connected to the air chamber by bolts.

[0012] In the above scheme, the vibrating seed removal disc includes a seed removal disc and a vibrating cylinder; the seed removal disc has seed removal holes; the seed removal disc is connected to the vibrating cylinder; the vibrating cylinder is connected to a dual-station frame; the seed removal disc vibrates under the drive of the vibrating cylinder.

[0013] In the above scheme, the air pressure switching device includes a first high-pressure blower, a variable air outlet pipe, a variable air outlet piston, and an air duct; the air outlet of the first high-pressure blower is connected to the variable air outlet pipe; the piston of the variable air outlet piston is tightly fitted with the variable air outlet pipe, and a gap is maintained between the piston and the variable air outlet pipe in the middle position; one end of the variable air outlet pipe is connected to the air duct; the other end of the air duct is connected to the air outlet of the air chamber; the variable air outlet piston moves within the variable air outlet pipe to switch the air pressure state of the seed suction disc, so that the two sets of seed suction discs alternately perform seed suction and sowing operations.

[0014] Furthermore, there are four sets of air pressure switching devices. The air ducts of two sets of air pressure switching devices are respectively connected to two air inlets of the seed suction tray installed at the front work position; the air ducts of the other two sets of air pressure switching devices are connected to two air inlets of the seed suction tray installed at the rear work position; one end of the variable air outlet pipe has an air inlet c, one side of the pipe wall has an air inlet a and an air outlet b, and the other side of the pipe wall has an air inlet d; air inlet d is located between air inlet a and air outlet b; the variable air outlet piston moves within the variable air outlet pipe. When air inlet a of the variable air outlet pipe is connected to air inlet d of the connecting pipe, air outlet b of the variable air outlet pipe is not connected to air inlet d, so that the air chamber is in a negative pressure state, allowing the seed suction tray to complete the seed suction operation; when air inlet a enters from air inlet c on the pipe wall of the variable air outlet pipe, air inlet d is connected to air outlet b but not to air inlet a, the air pressure in the air chamber is atmospheric pressure, completing the seed dispensing operation.

[0015] A whole-tray air-suction precision rice seedling raising and sowing production line includes the aforementioned dual-station sowing device.

[0016] The above scheme also includes a horizontal automatic tray feeding device, a soil spreading device, a seed adding device, a watering device, and a horizontal automatic tray stacking device; the soil spreading device includes a bottom soil spreading device and a top soil covering device; the horizontal automatic tray feeding device, the bottom soil spreading device, the dual-station high-efficiency sowing device, the watering device, the top soil covering device, and the horizontal automatic tray stacking device are arranged sequentially from front to back along the operation direction of the production line; the horizontal automatic tray feeding device is used for conveying seedling trays; the bottom soil spreading device performs bottom soil spreading operation on the seedling trays conveyed by the production line; the dual-station high-efficiency sowing device performs seed suction and sowing operations on the seed suction trays at the front and rear stations of the seedling trays after bottom soil spreading is completed; the seed adding device is located above the dual-station high-efficiency sowing device and is used to add seeds to the dual-station high-efficiency sowing device; the watering device is used to water the seedling trays after sowing; the top soil covering device performs top soil spreading operation on the seedling trays conveyed by the production line; the horizontal automatic tray stacking device is used to stack and store the seedling trays after sowing is completed.

[0017] In the above scheme, the transverse automatic tray feeding device includes a tray-laying fixing frame, an upper cylinder, a lower cylinder, a seedling tray, and a chuck; the cylinder bodies of the upper cylinder and the lower cylinder are symmetrically installed on both sides of the tray-laying fixing frame; the piston rods of the upper cylinder and the lower cylinder on both sides of the tray-laying fixing frame are equipped with chucks; the seedling tray is placed transversely on the chuck.

[0018] In the above scheme, the soil-laying device includes a first conveyor belt, a soil-laying and storage bin, and a first motor; the soil-laying and storage bin is located above the first conveyor belt; the first motor is connected to the main shaft of the first conveyor belt through gears to drive the conveyor belt to perform the conveying function.

[0019] In the above scheme, the seeding device includes a second conveyor belt, a seeding box, and a second motor; the bottom of the seeding box is provided with a second conveyor belt; the two ends of the second conveyor belt are respectively provided with a conveyor belt drive shaft and a conveyor belt driven shaft; the output shaft gear of the second motor is connected to the conveyor belt drive shaft to drive the second conveyor belt to rotate, and the direction of the second conveyor belt is controlled by controlling the direction of the output shaft of the second motor, so as to realize seeding on both sides.

[0020] In the above scheme, the watering device includes a watering pipe and a fixed bracket; the watering pipe includes a first watering pipe, a second watering pipe and a third watering pipe, and the fixed bracket includes an upper fixed bracket and a lower fixed bracket. The two ends of the watering pipe are respectively installed on the fixed bracket and the lower fixed bracket, and the upper fixed bracket and the lower fixed bracket are installed on the bracket of the seedling production line through fixed holes.

[0021] In the above scheme, the transverse automatic stacking device includes a second cylinder, a stacking fixing frame, a tray, and a stacking chuck; the cylinder body end of the second cylinder is connected to the stacking fixing frame, and the piston rod end is connected to the tray; multiple stacking chucks are symmetrically arranged on the inner side of the stacking fixing frame; the lower end of the stacking chuck is hinged to a groove on the inner side of the stacking fixing frame, and the upper end passes through a through slot on the inner side of the stacking fixing frame and is connected to a spring in the through slot.

[0022] The above solution also includes an automatic soil screening and adding device; the automatic soil screening and adding device is connected to the bottom soil laying device and the topsoil covering device, and can automatically screen and add soil according to the soil requirements of the seedling sowing production line.

[0023] Furthermore, the automatic soil screening and adding integrated device includes: a soil storage bin, a conveying device a, a conveying device b, a soil screening device, and a soil delivery bin; the conveying device a is located below the soil storage bin; the conveying device a is used to transport soil from the soil storage bin to the soil screening device; the conveying device b is used to transport soil from the soil screening device to the soil delivery bin; the soil screening device screens and refines the initial soil transported from the soil storage bin to the conveying device a; the conveying device b stores the soil transported from the soil screening device in the soil delivery bin, and the soil delivery bin transports the soil to the soil spreading device.

[0024] Furthermore, the bottom outlet of the soil storage silo forms a cone shape, and the outlet of the soil storage silo is provided with several intermediate supports for the soil storage silo.

[0025] Furthermore, the conveying device a includes a third motor, a gear, a conveyor belt a, a rotating shaft, and a Y-shaped groove; the third motor is connected to the rotating shaft gear, and the rotating shaft gear is connected to the rotating shaft of the conveyor belt a through a chain to drive the conveyor belt a to run; the outlet of the conveying device a is provided with a Y-shaped groove, and the conveyor belt a transports the soil to the top of the soil screening cage, and the soil is leaked into the soil screening cage through the Y-shaped groove.

[0026] Furthermore, the conveying device b includes a fifth motor, a rotating shaft, a conveyor belt b, and a sixth motor; the conveyor belt b includes a soil screening conveying section, an upward conveying section, and a soil conveying section arranged in sequence; the fifth motor is connected to the rotating shaft of the soil screening conveying section via a sprocket, and the sixth motor is connected to the rotating shaft of the soil conveying section via a sprocket, and the fifth motor and the sixth motor simultaneously drive the conveyor belt b to perform the conveying operation.

[0027] Furthermore, the soil screening device includes a soil screening cage, a drive mechanism, a support, and a U-shaped plate; the soil screening cage is mounted on the support; the circumference of the soil screening cage is evenly distributed with circular screen holes, and the soil screening cage is arranged at an incline; the end outlet of the soil screening cage is provided with a U-shaped plate, which transports the soil to the conveying device b; the drive mechanism is connected to the soil screening cage and drives the soil screening cage to rotate.

[0028] Furthermore, the driving mechanism includes a second pulley, a fourth motor, a reducer, a pinion, and a large gear plate; both sides of the sieve cage are respectively provided with a large gear plate and a second pulley; the fourth motor is connected to the reducer and installed at one end of the sieve cage, the reducer is connected to a pinion, the pinion meshes with a large gear plate on one side, and the large gear plate on the other side slides with two second pulleys; the fourth motor drives the sieve cage to rotate.

[0029] Furthermore, the bottom of the support is provided with a leveling device; the leveling device includes a leveling device, a leveling device, a leveling device, and a leveling device.

[0030] The above scheme also includes a recycling bin; the top of the recycling bin is connected to a second high-pressure blower, and the bottom of the recycling bin is provided with a soil storage bin; the air outlet valve of the second high-pressure blower is connected to a first air pressure rod, which is used to adjust the opening of the air outlet valve; a soil discharge baffle is provided at the outlet of the soil storage bin, and a second air pressure rod is provided on the soil discharge baffle, which is used to adjust the opening of the soil discharge baffle.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] 1. According to one aspect of the present invention, the dual-station seeding device has a simple and compact structure and a fast response speed, and can realize the alternating operation of the dual seed-absorbing discs at the front and rear stations, thereby improving its working efficiency.

[0033] 2. According to one aspect of the present invention, a dual-station high-efficiency sowing device is installed on a whole-tray air-suction rice precision seedling raising and sowing production line. It can automatically complete the processes of tray delivery, bottom soil laying, sowing, watering and tray stacking in one go. Through dual-station high-efficiency sowing, automatic seed addition, automatic soil sieving and addition, and automatic transverse tray delivery and stacking, combined with whole-tray air-suction sowing, the working efficiency and sowing accuracy of the whole-tray air-suction rice precision seedling raising and sowing production line can be effectively improved.

[0034] 3. According to one aspect of the present invention, the air chamber of the seed suction tray is in a negative pressure state to complete seed suction by means of a wind pressure switching device, and then switched to an atmospheric pressure state to complete sowing. This effectively solves the problem of seed rebound when it comes into contact with the bottom soil of the seedling tray due to the high speed of traditional positive pressure sowing, and effectively improves the sowing accuracy.

[0035] 4. According to one aspect of the present invention, by using a vibrating seed removal disc device, the seeds are brought to a "boiling" state, and the impurities in the seeds are discharged through the seed removal holes under the action of vibration. This can effectively solve the problem of needle blockage during the sowing process and achieve precision sowing.

[0036] 5. According to one aspect of the present invention, automatic seeding is achieved through a seeding device, thereby improving seeding efficiency and uniformity.

[0037] 6. According to one aspect of the present invention, the efficiency of the soil adding device is improved by using an automatic integrated soil screening and adding device, and the sowing effect is improved by refining the nutrient soil.

[0038] 7. According to one aspect of the present invention, the watering device sprays water onto the seedling trays after sowing to reduce seed displacement during transportation and provide sufficient moisture for seed germination.

[0039] 8. According to one aspect of the present invention, the transverse automatic tray feeding device and the transverse automatic tray stacking device improve the sowing speed by transversely conveying the seedling trays.

[0040] Note that the description of these effects does not preclude the existence of other effects. One aspect of the invention does not necessarily have all the aforementioned effects. Effects other than those described above can be readily observed and extracted from the description, drawings, claims, etc. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of a whole-tray air-suction precision rice seedling raising and sowing production line according to an embodiment of the present invention.

[0042] Figure 2 This is a schematic diagram of a horizontal automatic tray-laying device according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of a soil-laying device according to an embodiment of the present invention;

[0044] Figure 4 This is a schematic diagram of the structure of a dual-station high-efficiency seeding device according to an embodiment of the present invention.

[0045] Figure 5 This is a schematic diagram of the seed suction disc structure according to one embodiment of the present invention;

[0046] Figure 6 This is a schematic diagram of the vibration-driven seed removal disc structure according to one embodiment of the present invention;

[0047] Figure 7 This is a schematic diagram of a dual-station rack structure according to an embodiment of the present invention;

[0048] Figure 8 This is a schematic diagram of a variable air outlet duct structure according to an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of a variable air outlet piston structure according to an embodiment of the present invention;

[0050] Figure 10 This is a schematic diagram of the airflow direction of the variable air outlet piston in position I according to an embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram of the airflow direction of the variable air outlet piston in position II according to an embodiment of the present invention;

[0052] Figure 12 This is a schematic diagram of the seed-adding device according to one embodiment of the present invention;

[0053] Figure 13 This is a top view schematic diagram of the seed-adding device according to an embodiment of the present invention;

[0054] Figure 14 This is a schematic diagram of the structure of an automatic sprinkler device according to an embodiment of the present invention;

[0055] Figure 15 This is a schematic diagram of a horizontal automatic stacking device according to an embodiment of the present invention;

[0056] Figure 16 This is a schematic diagram of an automatic soil screening and soil adding integrated device according to an embodiment of the present invention;

[0057] Figure 17 This is a schematic diagram of a soil storage silo structure according to an embodiment of the present invention;

[0058] Figure 18 This is a schematic diagram of the structure of the conveying device a according to an embodiment of the present invention;

[0059] Figure 19 This is a schematic diagram of the structure of a soil screening device according to an embodiment of the present invention;

[0060] Figure 20 This is a schematic diagram of the structure of the conveying device b according to an embodiment of the present invention;

[0061] Figure 21 This is a schematic diagram of the assembly of the fan and the pneumatic rod according to one embodiment of the present invention;

[0062] Figure 22 This is a schematic diagram of the assembly of the soil delivery chamber, fan, and pneumatic rod according to one embodiment of the present invention;

[0063] Figure 23 This is a schematic diagram of the assembly of the recycling bin and the soil storage bin of the soil laying device according to one embodiment of the present invention.

[0064] In the diagram: 1. Horizontal automatic tray feeding device; 2. Soil spreading device; 3. Dual-station high-efficiency seeding device; 4. Seed adding device.

[0065] 5. Sprinkler device, 6. Horizontal automatic tray stacking device, 7. Automatic soil screening and adding integrated device, 8. Seedling tray, 101. Tray placing and fixing frame, 102. Upper cylinder, 103. Lower cylinder, 105. Chuck, 201. Conveyor belt main shaft, 202. First conveyor belt, 203. Soil storage bin, 204. First motor fixing bracket, 205. First adjustable fixing hole, 206. First motor, 301-1. Air chamber, 301-2. Seed suction plate, 301-3. Suction needle, 301-4. First pulley, 301-5. Fixing plate, 301-6. First cylinder, 302-1. Impurity removal tray, 30 2-2. Vibrating cylinder; 302-3. Impurity removal hole; 303-1. First high-pressure blower; 303-2. Variable air outlet pipe; 303-3. Variable air outlet piston; 303-4. Air duct; 303-5. High-pressure blower support frame; 304-1. Slide rail; 304-2. Front position; 304-3. Seedling tray sowing position; 304-4. Rear position; 401a. Conveyor belt drive shaft; 401b. Conveyor belt driven shaft; 402. Second conveyor belt; 403. Second motor; 404. Second adjustable fixing hole; 405. Second motor fixing bracket; 406. Seed feeding box; 407. Reduction gear; 501. Fixed hole, 502a. Upper fixed bracket, 502b. Lower fixed bracket, 503a. First sprinkler pipe, 503b. Second sprinkler pipe, 503c. Third sprinkler pipe, 601. Second cylinder, 602. Stacking tray fixing frame, 603. Pallet, 604. Stacking tray chuck, 701. Soil storage bin, 701a. Soil storage bin intermediate support, 702. Conveying device a, 702a. Third motor, 702b. Gear, 702d. Conveyor belt a, 702f. Rotating shaft, 703. Soil screening device, 703a. Soil screening cage, 703b. Second pulley, 703c. U-shaped plate, 703d. Four motors, 703e. Support frame; 704. Y-shaped trough; 705. Leveling device, 705a. Leveling device 1, 705b. Leveling device 2, 705c. Leveling device 3, 705d. Leveling device 4; 706. Conveying device b, 706a. Fifth motor, 706b. Soil screening and conveying section, 706c. Upward conveying section, 706d. Conveyor belt b, 706e. Soil conveying section, 706f. Rotating shaft; 707. Second high-pressure blower, 708. First air pressure bar, 709. Recovery bin, 710. Soil conveying bin, 711. Second air pressure bar, 712. Sixth motor, 713. Recovery and storage bin. Detailed Implementation

[0066] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "front," "rear," "left," "right," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0068] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0069] Figure 1 The image shows a preferred embodiment of the whole-tray air-suction precision rice seedling raising and sowing production line of the present invention. The whole-tray air-suction precision rice seedling raising and sowing production line includes a transverse automatic tray feeding device 1, a soil spreading device 2, a dual-station sowing device, a seed adding device 4, a watering device 5, a transverse automatic tray stacking device 6, and an automatic soil sieving and adding integrated device 7.

[0070] The soil-laying device 2 includes a bottom soil-laying device 2a and a top soil-covering device 2b; the dual-station seeding device includes a dual-station high-efficiency seeding device 3; the transverse automatic tray feeding device 1, the bottom soil-laying device 2a, the dual-station high-efficiency seeding device 3, the watering device 5, the top soil-covering device 2b, and the transverse automatic tray stacking device 6 are arranged sequentially from front to back along the working direction of the conveyor belt.

[0071] The whole-tray air-suction rice precision seedling raising and sowing production line also includes a controller; the controller is connected to the horizontal automatic tray feeding device 1, the soil spreading device 2, the dual-station sowing device, the seed adding device 4, the watering device 5, the horizontal automatic tray stacking device 6, and the automatic soil screening and adding integrated device 7.

[0072] The horizontal automatic tray feeding device 1 is located at the front end of the seedling raising and sowing production line and is used for the horizontal automatic transport of seedling trays in the seedling raising and sowing production line; the bottom soil laying device 2a lays bottom soil on the seedling trays transported from the horizontal automatic tray feeding device 1, so that the dual-station high-efficiency sowing device 3 can sow seeds on the nutrient soil; the dual-station high-efficiency sowing device 3 performs seed suction and sowing operations on the seedling trays after the bottom soil has been laid, with the seed suction trays on the front station 304-2 and the rear station 304-4 alternately performing seed suction and sowing operations, which greatly improves the sowing efficiency; the seed adding device 4 is located above the dual-station high-efficiency sowing device 3. Preferably, the seed adding device 4 is an automatic seed adding device, which can automatically add seeds to the dual-station high-efficiency sowing device according to the amount of seeds in the seed box. 3. Seeding; The watering device 5 is used to water the seedling trays 8 after sowing, reducing seed displacement during transportation and providing sufficient moisture for seed germination; The topsoil covering device 2b lays topsoil on the seedling trays after the bottom soil laying, sowing, and watering operations, providing a suitable growth environment for rice seeds; The automatic soil sieving and adding device 7 is connected to the bottom soil laying device 2a and the topsoil covering device 2b, and can automatically sieve soil according to the soil requirements of the seedling sowing production line, and add nutrient soil to the soil storage bin 203 of the soil laying device 2 to ensure that it has enough nutrient soil for the seedling trays; The horizontal automatic tray stacking device 6 is located at the end of the seedling sowing production line and is used to horizontally stack and store the seedling trays 8 after sowing.

[0073] like Figure 2 As shown, the transverse automatic tray feeding device 1 includes a tray fixing frame 101, an upper cylinder 102, a lower cylinder 103, a seedling tray 8, and a chuck 105;

[0074] The upper cylinder 102 and the lower cylinder 103 are symmetrically mounted on both sides of the tray-laying fixing frame 101. Each piston rod of the upper cylinder 102 and the lower cylinder 103 on both sides of the tray-laying fixing frame 101 is equipped with a chuck 105. The seedling tray 8 is placed horizontally on the chuck 105. Preferably, there are four chucks 105, each connected to the piston rod of the upper cylinder 102 and the lower cylinder 103 mounted on both sides of the tray-laying fixing frame 101.

[0075] The horizontal automatic tray feeding device 1 is installed at the front end of the whole-tray air-suction rice precision seedling raising and sowing production line. During operation, the controller controls the upper cylinders 102 on both sides to extend, inserting the chuck 105 between the two lowest seedling trays 8. The controller then controls the lower cylinders 103 on both sides to retract, and the lowest seedling tray 8 automatically falls onto the conveyor belt of the production line, completing the automatic tray feeding. Then, the controller controls the lower cylinders 103 on both sides to extend and the upper cylinders 102 on both sides to retract, and the seedling tray 8 falls onto the chuck 105 connected to the lower cylinders 103 on both sides. Then, the controller controls the upper cylinders 102 on both sides to extend and the lower cylinders 103 on both sides to retract, completing the next tray feeding operation. The horizontal automatic tray feeding device adjusts the tray feeding interval according to the production line operation efficiency, and repeats the above automatic tray feeding operation at intervals.

[0076] like Figure 3 As shown, the bottom soil laying device 2a and the topsoil covering device 2b have the same structure. They are distinguished by the difference between the nutrient soil being laid above and below the seeds, and are both called soil laying devices 2.

[0077] The soil-laying device 2 includes a first conveyor belt 202, a soil-laying and storage bin 203, and a first motor 206. The first motor 206 is fixed by a first motor fixing bracket 204, and the first motor fixing bracket 204 and the soil-laying and storage bin 203 are fixedly connected through a first adjustable fixing hole 205. The first motor 206 is connected to the main shaft 201 of the conveyor belt of the first conveyor belt 202 of the soil-laying device through gears.

[0078] The bottom soil laying device 2a is installed behind the transverse automatic tray feeding device 1. When the seedling tray 8 is transported from the transverse automatic tray feeding device 1 to the bottom soil laying device 2a via the conveyor belt, the first motor 206 of the bottom soil laying device is started, driving the first conveyor belt 202 to move, so that the nutrient soil falls evenly on the seedling tray 8. The amount of nutrient soil falling on the seedling tray 8 per unit time can be changed by adjusting the speed of the bottom soil laying device 2 motor, thereby changing the thickness of the bottom soil of the seedling tray nutrient soil.

[0079] The topsoil covering device 2b is installed behind the watering device 5. When the seedling tray 8, which has completed the sowing and watering process, is transported to the topsoil covering device 2b, the first motor 206 of the topsoil covering device is started, driving the first conveyor belt 202 to move, so that the nutrient soil falls evenly on the seedling tray 8. The amount of nutrient soil falling on the seedling tray 8 per unit time can be changed by adjusting the speed of the motor of the topsoil covering device 2b, thereby changing the thickness of the topsoil of the nutrient soil on the seedling tray 8.

[0080] The bottom soil laying device 2a and the topsoil covering device 2b are connected to the integrated soil screening and adding device 7. The integrated soil screening and adding device works in conjunction with the soil laying device. When the amount of nutrient soil in the soil storage chamber 203 of the soil laying device reaches the low soil threshold, the integrated soil screening and adding device 7 starts to add nutrient soil to the soil storage chamber 203 of the soil laying device. When the amount of nutrient soil reaches the high soil threshold, the integrated soil screening and adding device 7 stops adding nutrient soil to the soil storage chamber 203 of the soil laying device, ensuring that the nutrient soil in the storage chamber can always provide enough nutrient soil for the seedling tray.

[0081] like Figure 4-11 As shown, a dual-station seeding device includes a dual-station high-efficiency seeding device 3; the dual-station high-efficiency seeding device 3 includes a seed suction plate, a vibrating seed removal plate, an air pressure switching device, and a dual-station frame; the various components work together to improve seeding efficiency while ensuring seeding effect.

[0082] like Figure 7 As shown, the dual-station frame is provided with a front station 304-2, a seedling tray sowing position 304-3, and a rear station 304-4 from front to back. Slide rails 304-1 are provided on both sides of the dual-station frame. The dual-station frame is fixedly connected to the frame of the whole-tray air suction rice precision seedling raising and sowing production line. The front station 304-2 and the rear station 304-4 are respectively used to place two vibrating seed removal trays 302.

[0083] There are two sets of vibrating seed removal discs, which are respectively installed at the front station 304-2 and the rear station 304-4 of the double-station support; there are two sets of seed suction discs, which are respectively installed at the front station 304-2 and the rear station 304-4 of the double-station support and are located above the vibrating seed removal discs; the two sets of seed suction discs can reciprocate linearly along the slide rail 304-1 on the double-station frame 304 at the front station-seedling tray sowing position and the rear station-seedling tray sowing position, respectively;

[0084] The air pressure switching device is connected to two sets of seed suction plates respectively, and is used to switch the air pressure state of the seed suction plates so that the seed suction plates on the front station 304-2 and the rear station 304-4 alternately perform seed suction and sowing operations.

[0085] like Figure 5 As shown, the seed suction plate includes an air chamber 301-1, a seed suction plate 301-2, a suction needle 301-3, a pulley 301-4, and a first cylinder 301-6;

[0086] Each of the air chambers 301-1 is provided with two air vents; the seed suction plate 301-2 is installed at the bottom of the air chamber 301-1; the suction needle 301-3 is installed on the mounting hole of the seed suction plate 301-2; the first pulley 301-4 is installed on both sides of the air chamber 301-1 and is slidably matched with the slide rail 304-1 on the double-station frame; the fixed end of the first cylinder 301-6 is hinged to the double-station frame, and the piston rod end is hinged to the air chamber 301-1;

[0087] The air chamber 301-1, driven by the extension and retraction of the piston rod of the first cylinder 301-6, moves back and forth linearly along the slide rail 304-1 on the dual-station frame 304 at the front station-seedling tray sowing position and the rear station-seedling tray sowing position respectively.

[0088] When the air pressure switching device causes the air chamber 301-1 of the front station 304-2 to be in a negative pressure state, the suction needle 301-3 of the air chamber 301-1 of the front station 304-2 performs seed suction operation. At this time, the controller controls the air chamber 301-1 of the rear station 304-4 to move to the seedling tray sowing position 304-3 through the first cylinder 301-6. The air pressure switching device causes the air chamber 301-1 of the rear station 304-4 to be in a atmospheric pressure state, and its suction needle 301-3 performs seed dispensing operation. The controller controls the air pressure switching device to make the air chamber 301-1 of the front station 304-2 and the air chamber 301-1 of the rear station 304-4 alternately perform seed suction and sowing operations. Specifically, when the photoelectric sensor detects that the seedling tray 8 is about to reach the seeding position 304-3, the controller drives the air pressure switching device (303) to put the air chamber 301-1 of the front station 304-2 into a negative pressure state. The suction needle 301-3 of the air chamber 301-1 performs the seed suction operation. At this time, the controller controls the first cylinder 301-6 to drive the air chamber 301-1 of the rear station 304-4 to move to the seeding position 304-3, where the suction needle 301-3 performs the seed dispensing operation. The air chambers 301-1 of the front station 304-2 and the air chambers 301-1 of the rear station 304-4 alternately perform seed suction and sowing operations. During the operation, the two seed suction trays 301 and the vibrating seed removal tray 302 work alternately to improve work efficiency. In a specific embodiment of the present invention, the efficiency reached 2073 trays / hour, as tested by the Jinan Agricultural Machinery Product Quality Inspection Center of the Machinery Industry.

[0089] like Figure 5 As shown, the air chamber 301-1 is provided with fixing plates 301-5 on both sides; a sliding groove is formed between the bottom of the fixing plate 301-5 and the air chamber 301-1, and the seed suction plate 301-2 slides into the sliding groove between the bottom of the air chamber 301-1 and the fixing plate 301-5, and is tightly connected to the air chamber 301-1 by tightening bolts.

[0090] like Figure 6As shown, the vibrating seed removal disc includes a seed removal disc 302-1 and a vibrating cylinder 302-2; the seed removal disc 302-1 has a seed removal hole 302-3; the seed removal disc 302-1 is fixedly connected to the vibrating cylinder 302-2 by bolts; the vibrating cylinder 302-2 is fixedly connected to the dual-station frame 304; the seed removal disc 302-1 vibrates under the drive of the vibrating cylinder 302-2, causing the seeds to "boil," while the impurities are discharged through the seed removal hole 302-3 under vibration, effectively solving the clogging problem of the suction needle 301-3; the vibrating cylinder 302-2 can be a cylinder such as a pneumatic cylinder or a hydraulic cylinder that can realize linear reciprocating motion, and is fixedly connected to the dual-station frame 304.

[0091] like Figure 8-11 As shown, the air pressure switching device includes a first high-pressure blower 303-1, a variable air outlet pipe 303-2, a variable air outlet piston 303-3, an air duct 303-4, and a high-pressure blower support frame 303-5;

[0092] The air outlet of the first high-pressure blower 303-1 is connected to the variable air outlet pipe 303-2; the piston of the variable air outlet piston 303-3 is tightly fitted with the variable air outlet pipe 303-2, and a gap is maintained between the piston and the variable air outlet pipe 303-2 in the middle position; one end of the variable air outlet pipe 303-2 is connected to the air duct 303-4; the other end of the air duct 303-4 is connected to the air outlet of the air chamber 301-1; the variable air outlet piston 303-3 moves within the variable air outlet pipe 303-2 to switch the air pressure state of the seed suction plate, so that the two sets of seed suction plates alternately perform seed suction or sowing operations.

[0093] In one embodiment of the present invention, preferably, there are four sets of air pressure switching devices, of which two sets of air pressure switching devices are installed on the production line control cabinet and their air ducts 303-4 are respectively connected to the two air outlets of the air chamber 301-1 of the seed suction plate installed at the front station 304-2; the other two sets of air pressure switching devices are installed on the high-pressure blower support frame 303-5 and their air ducts 303-4 are connected to the two air outlets of the air chamber 301-1 of the seed suction plate installed at the rear station 304-4.

[0094] like Figure 8 As shown, one end of the variable air outlet pipe 303-2 is provided with an air outlet c, one side of the pipe wall is provided with an air inlet a and an air outlet b, and the other side of the pipe wall is provided with an air outlet d; the air outlet d is located between the air inlet a and the air outlet b.

[0095] The variable air outlet piston 303-3 performs piston movement within the variable air outlet pipe 303-2. When the variable air outlet piston 303-3 needs to switch positions, the controller controls the cylinder to drive the variable air outlet piston 303-3 to move to a preset position. When the variable air outlet piston 303-3 is in position I, such as... Figure 10As shown, the air inlet a of the variable air outlet pipe 303-2 is connected to the air outlet d of the connecting air pipe 303-4 of the variable air outlet pipe 303-2. At this time, the air outlet b of the variable air outlet pipe 303-2 is not connected to the air outlet d, so that the air chamber 301-1 is in a negative pressure state, allowing the seed suction plate to complete the seed suction operation; when the variable air outlet piston 303-3 is in position II, as Figure 11 As shown, at this time, air inlet a takes in air from air outlet c on the pipe wall of variable air outlet pipe 303-2. Air outlet d is connected to air outlet b, but not to air inlet a. At this time, the air pressure in air chamber 301-1 is atmospheric pressure. The seeds fall into the precisely aligned seed tray under their own gravity. This prevents the seeding speed from being too high due to positive pressure and the seeding from rebounding when it comes into contact with the bottom soil in the seed tray, which would cause the seeds to bounce randomly into other holes and reduce the sowing accuracy.

[0096] like Figure 12 and 13 As shown, the seed-adding device 4 includes a second conveyor belt 402, a seed-adding box 406, and a second motor 403;

[0097] The second motor 403 is fixed by a second motor mounting bracket 405, and the second motor mounting bracket 405 is fixedly connected to the seed box 406 through a second adjustable fixing hole 404; the bottom of the seed box 406 is provided with a second conveyor belt 402; both ends of the second conveyor belt 402 are respectively provided with a conveyor belt drive shaft 401a and a conveyor belt driven shaft 401b; the output shaft gear of the second motor 403 is connected to the conveyor belt drive shaft 401a, driving the second conveyor belt 402 to rotate, and controlling the direction of the second conveyor belt 402 by controlling the direction of the output shaft of the second motor 403, thus moving to achieve seeding on both sides; when When the sensor detects that the weight of the seeds in the seed removal tray 302-1 on the front station 304-2 is lower than the preset value, it indicates that the seed removal tray 302-1 on the front station 304-2 needs to be replanted. The controller controls the motor to drive the conveyor belt to transport the seeds to the seed removal tray 302-1 on the front station 304-2. When the sensor detects that the weight of the seeds in the seed removal tray 302-1 on the rear station 304-4 is lower than the preset value, it indicates that the seed removal tray 302-1 on the rear station 304-4 needs to be replanted. The motor drives the conveyor belt to move in the opposite direction to transport the seeds to the seed removal tray 302-1 on the rear station 304-4.

[0098] The seed-adding device 4 is connected to the dual-station high-efficiency sowing device 3 and is installed directly above the middle of the two seed-removing trays 302-1. When seed addition is needed, the conveyor belt driven by the motor moves to add the seeds from the seed-adding box to the seed-removing tray at a certain rate. During operation, the seeds are first placed manually into the seed-adding box 406. As the seeds are continuously adsorbed by the seed-suction tray and sown on the seedling tray 8 with the bottom soil during the sowing process, the seeds in the seed-removing tray 302-1 will be continuously consumed. However, to maintain a good effect when the seed-suction tray adsorbs seeds, the seed layer... The seed thickness needs to be maintained within a certain range, which requires adding seeds to the seed removal tray 302-1. When the sensor detects that the amount of seeds in the seed removal tray 302-1 is lower than the amount of seeds normally absorbed by the seed suction tray, the controller activates the seed adding device 4. Seeds are added to the seed removal trays 302-1 at the forward station 304-2 and the rear station 304-4 as needed, ensuring that the seeds in the seed removal tray 302-1 are within the seed layer range where the seed suction tray has a good effect, thus ensuring good sowing results. Preferably, the sensor is a weighing sensor connected to the controller. The weighing sensor detects the weight of the seeds in the seed removal tray 302-1 and transmits the data to the controller, which then controls the seed adding device 4 to add seeds to the seed removal tray 302-1. The seed adding device 4 can be automated, reducing the number of workers required in the seedling raising and sowing production line, improving seed addition uniformity, achieving cost savings and efficiency improvement, and increasing the overall efficiency of the seedling raising and sowing production line.

[0099] like Figure 14 As shown, the watering device 5 includes watering pipes and fixed supports. The watering pipes include a first watering pipe 503a, a second watering pipe 503b, and a third watering pipe 503c. The fixed supports include an upper fixed support 502a and a lower fixed support 502b. The two ends of the watering pipes are respectively installed on the fixed supports 502a and 502b. The upper fixed supports 502a and 502b are installed on the support of the seedling production line through fixing holes 501. When the sown seeds are located on the surface of the nutrient soil laid in the seedling tray 8, the three micro-sprays can ensure the uniformity of watering and avoid seed displacement due to excessive water, which would ultimately create empty holes and affect the seedling raising effect.

[0100] The watering device 5 is installed behind the dual-station high-efficiency seeding device 3. During operation, when the seedling tray 8 moves to the watering device after sowing, the watering device is activated. The seedling tray passes through the first watering pipe 503a, the second watering pipe 503b, and the third watering pipe 503c in sequence, achieving multiple watering stages and improving the uniformity and amount of water sprayed. Preferably, each of the first watering pipe 503a, the second watering pipe 503b, and the third watering pipe 503c is equipped with a valve switch, which is connected to the controller. When the seedling tray requires less water after sowing, one, two, or three watering stages can be selectively activated according to actual needs.

[0101] like Figure 15 As shown, the transverse automatic stacking device 6 includes a second cylinder 601, a stacking fixing frame 602, a tray 603, and a stacking chuck 604;

[0102] The cylinder body of the second cylinder 601 is fixedly connected to the stacking tray fixing frame 602, and the piston rod end is fixedly connected to the tray 603. Multiple stacking tray chucks 604 are symmetrically arranged inside the stacking tray fixing frame 602. The lower end of each stacking tray chuck 604 is hinged to a groove inside the stacking tray fixing frame 602, and the upper end passes through a through slot inside the stacking tray fixing frame 602 and connects to a spring in the through slot. Preferably, there are four stacking tray chucks 604, each installed inside the stacking tray fixing frame 602.

[0103] The horizontal automatic tray stacking device 6 is installed at the end of the whole-tray air-suction precision rice seedling raising and sowing production line. During operation, when the photoelectric sensor detects that the seedling tray 8 has been transported to the tray 603 of the horizontal automatic tray stacking device, the controller controls two second cylinders 601 to extend synchronously, causing the seedling tray 8 to move upwards. When it passes the stacking chuck 604, the stacking chuck 604 retracts into the through groove under the action of the seedling tray 8. When the seedling tray 8 moves to the upper side of the stacking chuck 604, the stacking chuck 604 returns to its initial open state under the action of the spring. At this time, the controller controls the two second cylinders 601 to retract simultaneously, and the seedling tray 8 moves downwards under its own weight and falls onto the stacking chuck 604. When the next seedling tray 8 is transported to the tray 603, the above operation process is repeated to complete the automatic tray stacking operation. The horizontal automatic tray stacking device adjusts the tray addition interval time according to the production line efficiency, and repeats the above automatic tray stacking operation at intervals.

[0104] like Figure 16 As shown, the automatic soil screening and adding device 7 is connected to the bottom soil laying device 2a and the topsoil covering device 2b, and can automatically screen and add soil according to the soil requirements of the seedling sowing production line.

[0105] The automatic soil screening and soil adding integrated device 7 includes: a soil storage bin 701, a conveying device a 702, a conveying device b 706, a soil screening device 703, and a soil delivery bin.

[0106] The soil storage bin 701 is used to store the initial nutrient soil to be screened; the conveying device a 702 is used to convey the nutrient soil from the soil storage bin 701 to the soil screening device 703, and the conveying device b 706 is used to convey the nutrient soil between the soil screening device 703 and the soil delivery bin.

[0107] The soil screening device 703 screens and refines the initial nutrient soil conveyed from the soil storage bin 701 via the conveyor a 702. The soil delivery bin stores the nutrient soil conveyed from the soil screening device 703 via the conveyor b 706 in the soil delivery bin 710. The soil delivery bin 710 then delivers the nutrient soil to the soil spreading device 2, and the soil delivery bin 710 delivers soil according to the soil adding speed of the soil spreading device 2. The soil spreading device 2 receives the nutrient soil from the soil delivery bin 710 and the recovery bin 709, and adjusts the conveying speed of the soil spreading conveyor belt and the opening of the soil spreading and storage bin 203 according to the working speed of the seedling sowing production line and the required soil spreading thickness. Preferably, the soil outlet of the soil spreading and storage bin 203 is equipped with a soil retainer plate, which is connected to a pneumatic rod. The pneumatic rod is connected to a controller, which controls the pneumatic rod to adjust the opening of the soil retainer plate.

[0108] like Figure 17 As shown, the soil storage bin 701 is trapezoidal cone-shaped, and the conveying device a702 is located directly below the soil storage bin 701. The bottom outlet of the soil storage bin 701 forms a cone shape, which facilitates the nutrient soil in the soil storage bin 701 to fall onto the conveyor belt of the conveying device a702. Several intermediate supports 701a are provided at the outlet of the soil storage bin 701 to ensure that the structure is stable and not easily deformed.

[0109] like Figure 18 As shown, the conveying device a702 is used to transport the nutrient soil falling from the soil storage bin 701 to the soil screening device 703. The conveying device a702 includes a third motor 702a, a gear 702b, a conveyor belt a702d, a rotating shaft 702f, and a Y-shaped groove 704. The third motor 702a is located above the starting point of the conveyor belt 702d and is fixed together with the soil storage bin 701. It is connected to a reducer for speed reduction. The rotating shaft gear 702b connected to it drives the gear 702b on the rotating shaft 702f of the conveyor belt a702d via a chain, causing the rotating shaft 702f to rotate and the conveyor belt a702d to run. A Y-shaped groove 704 is provided at the outlet of the conveying device a702. The conveyor belt a702d transports the soil to the top of the soil screening cage 703a, and the soil leaks into the soil screening cage 703a through the Y-shaped groove 704, facilitating soil screening. Preferably, the third motor 702a is connected to a controller.

[0110] The conveying device b706 includes a fifth motor 706a, a rotating shaft 706f, a conveyor belt b706d, and a sixth motor 712. The conveyor belt b706d includes a soil screening and conveying section 706b, an upward conveying section 706c, and a soil conveying section 706e arranged sequentially. The fifth motor 706a is connected to the rotating shaft 706f of the soil screening and conveying section 706b via a sprocket, and the sixth motor 712 is connected to the rotating shaft 706f of the soil conveying section 706e via a sprocket. The fifth motor 706a and the sixth motor 712 simultaneously drive the conveyor belt b706d for conveying operations. Preferably, the fifth motor 706a is connected to a controller.

[0111] like Figure 19 As shown, the soil screening device 703 includes a soil screening cage 703a, a drive mechanism, a support 703e, and a U-shaped plate 703c. The soil screening cage 703a is mounted on the support 703e. The circumference of the soil screening cage 703a is evenly distributed with circular screen holes, the diameter of which is 50mm. This facilitates the refinement of clumps of nutrient soil while removing impurities. The soil screening cage 703a is arranged at an incline, preferably with a 15° incline angle, which allows larger impurities that are difficult to separate to be discharged from the soil screening cage 703a. The screened clean nutrient soil leaks through the circular screen holes onto the conveyor belt b706d below, and is then conveyed by the conveyor belt b706d to the top of the soil spreading device.

[0112] The end outlet of the soil screening cage 703a is provided with a U-shaped plate 703c, from which the screened impurities can exit the soil screening cage. The U-shaped plate 703c transports the nutrient soil to the conveying device b706. The drive mechanism is connected to the soil screening cage 703a and drives the soil screening cage 703a to rotate.

[0113] In one embodiment of the present invention, the driving mechanism includes a second pulley 703b, a fourth motor 703d, a reducer, a pinion, and a large gear plate; both sides of the sieve cage 703a are respectively provided with a large gear plate and a second pulley 703b; the fourth motor 703d is connected to the reducer and installed at one end of the sieve cage 703a; the reducer is connected to a pinion, which meshes with a large gear plate on one side, while the large gear plate on the other side slides with the two second pulleys 703b; the fourth motor 703d drives the sieve cage 703a to rotate. Preferably, the fourth motor 703d is connected to a controller.

[0114] In one embodiment of the present invention, the bottom of the support 703e is provided with a leveling device 705, which includes leveling device 1705a, leveling device 2705b, leveling device 3705c and leveling device 4705d; preferably, the leveling device 705 is a leveling screw; the soil screening device is adjusted to a horizontal state by means of the four leveling devices, and when any column is unstable, the length of the column can be increased by this device until the soil screening device achieves a stable effect.

[0115] In one embodiment of the present invention, a recovery chamber 709 is further included; the top of the recovery chamber 709 is connected to a second high-pressure blower 707, and the bottom of the recovery chamber 709 is provided with a soil recovery storage chamber 713; the air outlet valve of the second high-pressure blower 707 is connected to a first air pressure rod 708, which is used to adjust the opening degree of the air outlet valve; a soil discharge baffle is provided at the outlet of the soil recovery storage chamber 713, and a second air pressure rod 711 is provided on the soil discharge baffle, which is used to adjust the opening degree of the soil discharge baffle. The first air pressure rod 708 and the second air pressure rod 711 are respectively connected to a controller.

[0116] The recycling bin 709 is used to collect the recycled nutrient soil transported back by the nutrient soil recycling device. Soil that leaks down below the soil spreading device 2 is adsorbed into the recycling bin 709 by the second high-pressure blower 707 through the nutrient soil conveying pipeline. The recycling bin 709 can adjust the soil loading speed by adjusting the opening of the soil discharge baffle.

[0117] In one specific embodiment of the present invention, when the automatic soil screening and adding integrated device 7 is working, piles or bags of nutrient soil are added to the soil storage bin 701 by a small excavator or manually. The nutrient soil falls from the conical opening of the trapezoidal soil storage bin 701 onto the conveyor belt a702d. The conveyor belt a702d transports the initial nutrient soil from the lower opening of the soil storage bin 701 to the Y-shaped trough 704. The nutrient soil is then fed into the soil screening device 703 through the Y-shaped trough 704. The soil screening cage 703a rotates at a certain speed to refine the initial nutrient soil and simultaneously screen out impurities such as sand and straw. The refined nutrient soil after being screened by the soil screening cage 703a falls onto the conveyor belt b706d of the conveying device b706. The nutrient soil is then transported to the soil delivery bin 710 through three stages of conveying: the horizontally arranged soil screening conveying section 706b, the inclined upward conveying section 706c, and the horizontally arranged soil delivery conveying section 706e. The soil delivery chamber 710 has a limit switch. When the soil spreading device 2 does not need to add soil, the limit switch is closed, and the nutrient soil accumulates in the soil delivery chamber 710. When the soil in the soil delivery chamber 710 reaches the upper limit of the soil volume threshold, a high soil level switch signal is triggered, stopping the operation of the integrated soil screening and adding device 7. The soil in the soil delivery chamber 710 falls into the soil storage chamber 203 of the soil spreading device 2 as needed. When the soil in the soil delivery chamber 710 reaches the lower limit of the soil volume threshold, a low soil level switch signal is triggered, starting the operation of the integrated soil screening and adding device 7. The high soil level switch and the low soil level switch are respectively connected to the controller.

[0118] In the operation of the whole-tray air-suction precision rice seedling raising and sowing production line, after the horizontal automatic tray-turning device 1 completes the tray delivery, the seedling trays 8 are continuously moved to the dual-station high-efficiency sowing device 3 via the production line conveyor belt. Under the control of the production line control cabinet, when the sensor detects that the first seedling tray 8 is about to reach the seeding position 304-3 of the dual-station high-efficiency sowing device 3, the air pressure switching device puts the air chamber of the seed suction tray into a negative pressure state. Under the vibration of the vibrating seed removal tray, the seeds are in a "boiling" state, and the seed suction tray completes the seed suction operation. When the sensor detects that the first seedling tray 8 has reached the seeding position 304-3, the controller simultaneously controls the cylinder to move the front-station seed suction tray to the seeding position for precise alignment, and controls the air pressure switching device to make the air chamber pressure atmospheric pressure, and then the sowing operation is completed. Similarly, when the sensor detects that the second seedling tray 8 has reached the seeding position 304-3, the rear-station seed suction tray completes the seed suction or sowing operation. The dual-station high-efficiency sowing device 3 alternately suctions or sows seeds. Then, the seedling tray 8 is continuously moved by the conveyor belt to the horizontal automatic stacking device 6 to complete the stacking.

[0119] The specific working process of the whole-tray air-suction rice precision seedling raising and sowing production line is as follows: When the horizontal automatic tray feeding device 1, the bottom soil laying device 2a, the dual-station high-efficiency sowing device 3, the seed adding device 4, the top soil covering device 2b, the watering device 5, the horizontal automatic tray stacking device 6, and the automatic soil screening and adding integrated device 7 are installed on the whole-tray air-suction rice precision seedling raising and sowing production line, the processes of tray feeding, bottom soil laying, sowing, watering, and tray stacking can be completed automatically in one go.

[0120] In one specific embodiment of the present invention, a PLC is used as the core controller, which is responsible for coordinating the acquisition of sensor signals and the issuance of control commands in the system, so that the horizontal automatic tray feeding device 1, the bottom soil laying device 2a, the dual-station high-efficiency sowing device 3, the seed adding device 4, the topsoil covering device 2b, the watering device 5, the horizontal automatic tray stacking device 6, and the automatic soil screening and adding integrated device 7 work in coordination to ensure the efficient and stable operation of the entire seedling raising and sowing production line.

[0121] In one specific embodiment of the present invention, under the control of the controller, the upper cylinders 102 on both sides of the transverse automatic tray feeding device 1 are in the extended state, inserting the chuck 105 between the two lowest seedling trays 8, while the lower cylinders 103 on both sides retract, and the lowest seedling tray 8 automatically falls onto the conveyor belt of the production line, completing the automatic tray feeding; then the lower cylinders 103 on both sides extend, and the upper cylinders 102 on both sides retract, and the seedling tray 8 falls onto the chuck 105 connecting the lower cylinders 103 on both sides; then the upper cylinders 102 on both sides extend, and the lower cylinders 103 on both sides retract, completing the next tray feeding operation; the transverse automatic tray feeding device adjusts the tray feeding interval time according to the production line operation efficiency, and repeats the above-mentioned automatic tray feeding operation at intervals. The seedling trays 8 are continuously conveyed by a conveyor belt. When a seedling tray 8 is conveyed to the bottom soil spreading device 2a, the device spreads the bottom soil in the order the seedling trays arrive. When there is a gap between seedling trays, the device stops to prevent the nutrient soil from falling onto the conveyor belt. The thickness of the bottom soil layer is determined by both the conveying speed of the seedling sowing line and the conveyor belt speed of the bottom soil spreading device. When the bottom soil layer needs to be thickened, the conveying speed of the seedling sowing line can be reduced or the conveyor belt speed of the bottom soil spreading device can be increased. Conversely, when the bottom soil layer needs to be thinned, the conveying speed of the seedling sowing line can be increased or the conveyor belt speed of the bottom soil spreading device can be decreased. The seedling trays 8 are arranged in pairs. When the sensor detects that the first seedling tray 8 has arrived at the dual high-efficiency sowing device 3, the flow line controller controls the operation of the dual high-efficiency sowing device 3 based on parameters such as the moving position and speed of the first seedling tray 8. First, control the variable air outlet piston 303-3 of the air pressure switching device 303 at the front station 304-2 to position I, so that the air outlet d of the variable air outlet pipe 303-2 is connected to the air inlet a. At this time, the air outlet b of the variable air outlet pipe 303-2 is not connected to the air outlet d, so that the air chamber 301-1 of the seed suction plate at the front station 304-2 is in a negative pressure state. At the same time, the seed removal plate 302-1 is vibrated under the drive of the vibration cylinder 302-2, so that the seeds "boil". Meanwhile, the impurities are discharged through the impurity removal hole 302-3 under vibration, so that the seed suction plate 301 completes the seed suction operation. Then, the piston rod of cylinder 301-6 extends to move the seed suction plate of front position 304-2 to the seedling tray sowing position 304-3, which is precisely aligned with the 8 holes in the seedling tray. Then, when the variable air vent piston 303-3 moves to position II, air inlet a enters from air vent c on the pipe wall of variable air vent pipe 303-2. Air vent d is connected to air outlet b, but not to air inlet a. At this time, the air pressure in air chamber 301-1 is atmospheric pressure. The seeds fall into the precisely aligned holes in the seedling tray under their own gravity. This prevents the seeding speed from being too high due to positive pressure sowing, which would cause the seeds to bounce randomly into other holes and reduce sowing accuracy.The flow line controller controls the operation of the air pressure switching device 303 at the rear station 304-4 based on the moving position and speed of the second seedling tray 8. This operation is synchronized with the operation of the air pressure switching device 303 at the front station, the seed suction tray 301, and the vibrating seed removal tray device 302 to complete the seed suction or sowing operation. Thus, the dual-station high-efficiency sowing device 3 alternately completes the seed suction or seed distribution operation, effectively improving the sowing efficiency and accuracy of the whole-tray air-suction rice precision seedling raising and sowing production line. When the sensor detects that the seedling tray 8 has moved to the automatic sprinkler device 5 after sowing, the controller's sprinkler device 5 starts watering, sequentially applying three rounds of micro-spraying water to the seedling tray after sowing, ensuring that the water thoroughly wets the bottom soil and that the sown seeds do not shift, thus guaranteeing the number of seedlings per hill after seedling emergence. After watering, the seedling trays move to the topsoil covering device 2b. When the sensor detects that the seedling trays are being transported to the topsoil covering device 2b, the controller, consistent with the working principle of the topsoil covering device 2b, controls the topsoil covering device 2b to cover the seedling trays in the order they arrive. When there is a gap between the seedling trays, the topsoil covering device 2b stops to prevent the nutrient soil from falling onto the conveyor belt. The thickness of the topsoil is also determined by the combined speed of the seedling sowing production line and the conveyor belt speed of the topsoil covering device 2b. When the thickness of the topsoil on the seedling trays needs to be increased, the conveyor speed of the seedling sowing production line can be reduced or the conveyor belt speed of the topsoil covering device 2b can be increased. When the thickness of the topsoil on the seedling trays needs to be decreased, the conveyor speed of the seedling sowing production line can be increased or the conveyor belt speed of the topsoil covering device 2b can be decreased. After the seedling trays have been covered with topsoil, the entire seedling tray sowing process is complete. Finally, the seedling trays 8 are conveyed along the conveyor belt to the tray 603 of the horizontal automatic stacking device. At this time, two cylinders 601 extend simultaneously, causing the seedling trays 8 to move upwards. When they pass the stacking chuck 604, the stacking chuck 604 retracts under the influence of the seedling trays 8. When the seedling trays 8 move to the top of the stacking chuck 604, the stacking chuck 604 returns to its initial state under its own weight. At this time, the two cylinders 601 retract simultaneously, and the seedling trays 8 move downwards under their own weight and land on the stacking chuck 604. When the sensor detects that the next seedling tray 8 has been conveyed to the tray 603, the above process is repeated to complete the automatic stacking of the seedling trays 8. The horizontal automatic stacking device adjusts the tray addition interval according to the efficiency of the production line, repeating the above automatic stacking operation at intervals.

[0122] This invention relates to a dual-station seeding device, which features a simple and compact structure, fast response, and the ability to alternate between the front and rear seed trays, thereby improving its working efficiency. The dual-station high-efficiency seeding device 3 is installed on a whole-tray air-suction precision rice seedling raising and seeding production line. This production line can automatically complete the processes of tray delivery, bottom soil application, seeding, watering, and tray stacking in one go. Through dual-station high-efficiency seeding, automatic seed addition, automatic soil sieving and addition, and automatic transverse tray delivery and stacking, combined with whole-tray air-suction seeding, it effectively improves the working efficiency and seeding accuracy of the whole-tray air-suction precision rice seedling raising and seeding production line.

[0123] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0124] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A dual-station seeding device, characterized in that, The device includes a dual-station high-efficiency seeding device (3); the dual-station high-efficiency seeding device (3) includes a seed suction plate, a vibrating seed removal plate, an air pressure switching device, and a dual-station frame; The dual-station frame is provided with a front station (304-2), a seedling tray sowing position (304-3), and a rear station (304-4) from front to back. Slide rails (304-1) are provided on both sides of the dual-station frame. There are two sets of the vibrating seed removal discs, which are respectively installed at the front station (304-2) and the rear station (304-4) of the dual-station bracket; There are two sets of seed suction trays, which are respectively installed at the front station (304-2) and the rear station (304-4) of the double station bracket and are located above the vibrating seed removal tray; the two sets of seed suction trays can reciprocate linearly along the slide rail (304-1) on the double station frame (304) at the front station-seedling tray sowing position and the rear station-seedling tray sowing position respectively; The air pressure switching device is connected to two sets of seed suction plates respectively, and is used to switch the air pressure state of the seed suction plates so that the seed suction plates on the front station (304-2) and the rear station (304-4) can alternately perform seed suction and sowing operations; The vibrating seed removal disc includes a seed removal disc (302-1) and a vibrating cylinder (302-2); the seed removal disc (302-1) has seed removal holes (302-3); the seed removal disc (302-1) is connected to the vibrating cylinder (302-2); the vibrating cylinder (302-2) is connected to a dual-station frame (304); the seed removal disc (302-1) vibrates under the drive of the vibrating cylinder (302-2). The air pressure switching device includes a first high-pressure blower (303-1), a variable air outlet pipe (303-2), a variable air outlet piston (303-3), and an air duct (303-4). The air outlet of the first high-pressure blower (303-1) is connected to the variable air outlet pipe (303-2); the piston of the variable air outlet piston (303-3) is tightly fitted with the variable air outlet pipe (303-2), with a gap maintained between the middle position and the variable air outlet pipe (303-2); the variable air outlet pipe (303-2) is connected to one end of the air duct (303-4); the other end of the air duct (303-4) is connected to the air outlet of the air chamber (301-1); the variable air outlet piston (303-3) moves within the variable air outlet pipe (303-2) to switch the air pressure state of the seed suction disc, so that the two sets of seed suction discs alternately perform seed suction and sowing operations; The seed suction plate includes an air chamber (301-1), a seed suction plate (301-2), a suction needle (301-3), a first pulley (301-4), and a first cylinder (301-6). Each of the aforementioned air chambers (301-1) is provided with two air vents; The seed suction plate (301-2) is installed at the bottom of the air chamber (301-1); The suction needle (301-3) is installed on the mounting hole of the seed suction plate (301-2); The first pulley (301-4) is installed on both sides of the air chamber (301-1) and slides in cooperation with the slide rail (304-1) on the double-station frame; the fixed end of the first cylinder (301-6) is hinged to the double-station frame, and the piston rod end is hinged to the air chamber (301-1); The air chamber (301-1) moves back and forth in a straight line along the slide rail (304-1) on the double-station frame (304) under the extension and retraction of the piston rod of the first cylinder (301-6), at the front station-seedling tray sowing position and the rear station-seedling tray sowing position respectively, and alternately performs seed suction and sowing operations. There are four sets of air pressure switching devices. The air ducts (303-4) of two sets of air pressure switching devices are connected to the two air outlets of the seed suction plate installed at the front station (304-2); the air ducts (303-4) of the other two sets of air pressure switching devices are connected to the two air outlets of the seed suction plate installed at the rear station (304-4). The variable air outlet duct (303-2) has an air outlet c on one end of its pipe wall, an air inlet a and an air outlet b on one side of its pipe wall, and an air outlet d on the other side of its pipe wall; the air outlet d is located between the air inlet a and the air outlet b. The variable air inlet piston (303-3) moves within the variable air inlet pipe (303-2). When the air inlet a of the variable air inlet pipe (303-2) is connected to the air outlet d of the connecting duct (303-4) of the variable air inlet pipe (303-2), the air outlet b of the variable air inlet pipe (303-2) is not connected to the air outlet d, so that the air chamber (301-1) is in a negative pressure state, allowing the seed suction plate to complete the seed suction operation. When the air inlet a enters air from the air outlet c on the pipe wall of the variable air inlet pipe (303-2), the air outlet d is connected to the air outlet b, but not to the air inlet a. At this time, the air pressure in the air chamber (301-1) is atmospheric pressure, completing the seed dispensing operation.

2. The dual-station seeding device according to claim 1, characterized in that, The air chamber (301-1) is provided with fixing plates (301-5) on both sides respectively; A groove is formed between the bottom of the fixing plate (301-5) and the air chamber (301-1). The seed suction plate (301-2) slides into the groove and is connected to the air chamber (301-1) by tightening bolts.

3. A whole-tray air-suction precision rice seedling raising and sowing production line, characterized in that, Includes the dual-station seeding device according to any one of claims 1 or 2.

4. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 3, characterized in that, It also includes a transverse automatic tray feeding device (1), a soil spreading device (2), a seeding device (4), a watering device (5), and a transverse automatic tray stacking device (6). The soil-laying device (2) includes a bottom soil-laying device (2a) and a top soil-covering device (2b); the transverse automatic tray feeding device (1), the bottom soil-laying device (2a), the dual-station high-efficiency seeding device (3), the watering device (5), the top soil-covering device (2b), and the transverse automatic tray stacking device (6) are arranged sequentially from front to back along the operation direction of the production line. The horizontal automatic tray feeding device (1) is used for conveying the seedling trays (8); the bottom soil spreading device (2a) performs bottom soil spreading operation on the seedling trays (8) conveyed by the assembly line; the dual-station high-efficiency sowing device (3) performs alternating seed suction and sowing operations on the seed suction trays at the front station (304-2) and the rear station (304-4) of the seedling trays (8) after the bottom soil has been spread; the seed adding device (4) is located above the dual-station high-efficiency sowing device (3) and is used to add seeds to the dual-station high-efficiency sowing device (3); the watering device (5) is used to water the seedling trays (8) after sowing; the topsoil covering device (2b) performs topsoil spreading operation on the seedling trays (8) conveyed by the assembly line. The horizontal automatic stacking device (6) is used to stack and store the seedling trays (8) after sowing.

5. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 4, characterized in that, The transverse automatic tray feeding device (1) includes a tray fixing frame (101), an upper cylinder (102), a lower cylinder (103), a seedling tray (8), and a chuck (105). The upper cylinder (102) and the lower cylinder (103) are symmetrically installed on both sides of the tray-laying fixing frame (101); the piston rods of the upper cylinder (102) and the lower cylinder (103) on both sides of the tray-laying fixing frame (101) are equipped with chucks (105); the seedling tray (8) is placed horizontally on the chucks (105).

6. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 4, characterized in that, The soil-laying device (2) includes a first conveyor belt (202), a soil-laying storage bin (203), and a first motor (206); The soil storage bin (203) is located above the first conveyor belt (202); the first motor (206) is connected to the main shaft (201) of the first conveyor belt (202) through gears, driving the first conveyor belt (202) to convey.

7. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 4, characterized in that, The seed-adding device (4) includes a second conveyor belt (402), a seed-adding box (406), and a second motor (403); The bottom of the seeding box (406) is provided with a second conveyor belt (402); the two ends of the second conveyor belt (402) are respectively provided with a conveyor belt drive shaft (401a) and a conveyor belt driven shaft (401b); the output shaft gear of the second motor (403) is connected to the conveyor belt drive shaft (401a) to drive the second conveyor belt (402) to rotate. By controlling the direction of the output shaft of the second motor (403), the direction of the second conveyor belt (402) is controlled, and the movement realizes seeding on both sides.

8. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 4, characterized in that, The sprinkler device (5) includes a sprinkler pipe and a fixed support; The watering pipes include a first watering pipe (503a), a second watering pipe (503b), and a third watering pipe (503c). The fixed brackets include an upper fixed bracket (502a) and a lower fixed bracket (502b). The two ends of the watering pipes are respectively installed on the upper fixed bracket (502a) and the lower fixed bracket (502b). The upper fixed bracket (502a) and the lower fixed bracket (502b) are installed on the support of the seedling production line through the fixing holes (501).

9. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 4, characterized in that, The horizontal automatic stacking device (6) includes a second cylinder (601), a stacking fixing frame (602), a tray (603), and a stacking chuck (604). The cylinder body of the second cylinder (601) is connected to the stacking plate fixing frame (602), and the piston rod end is connected to the tray (603); multiple stacking plate chucks (604) are symmetrically arranged inside the stacking plate fixing frame (602); the lower end of the stacking plate chuck (604) is hinged to the groove inside the stacking plate fixing frame (602), and the upper end passes through the through groove inside the stacking plate fixing frame (602) and is connected to the spring in the through groove.

10. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 4, characterized in that, It also includes an automatic soil screening and soil addition integrated device (7); The automatic soil screening and soil adding integrated device (7) is connected to the bottom soil laying device (2a) and the topsoil covering device (2b), and can automatically screen and add soil according to the soil requirements of the seedling sowing production line.

11. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 10, characterized in that, The The automatic soil screening and soil adding integrated device (7) includes: soil storage bin (701), conveying device a (702), conveying device b (706), soil screening device (703), and soil delivery bin (710). Below the soil storage bin (701) is a conveying device a (702); the conveying device a (702) is used to transport soil from the soil storage bin (701) to the soil screening device (703); the conveying device b (706) is used to transport soil from the soil screening device (703) to the soil delivery bin (710). The soil screening device (703) screens and refines the initial soil transported from the soil storage bin (701) by the conveying device a (702); the conveying device b (706) stores the soil transported by the soil screening device (703) in the soil delivery bin (710), and the soil delivery bin (710) transports the soil to the soil spreading device (2).

12. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 11, characterized in that, The bottom outlet of the soil storage silo (701) forms a cone shape, and the outlet of the soil storage silo (701) is provided with several intermediate supports (701a).

13. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 11, characterized in that, The conveying device a (702) includes a third motor (702a), a gear (702b), a conveyor belt a (702d), a rotating shaft (702f), and a Y-shaped groove (704). The third motor (702a) is connected to the rotating shaft gear (702b), and the rotating shaft gear (702b) is connected to the rotating shaft (702f) of the conveyor belt a (702d) via a chain, driving the conveyor belt a (702d) to run; The outlet of the conveying device a (702) is provided with a "Y" shaped groove (704). The conveyor belt a (702d) transports the soil to the top of the soil screening cage (703a) and the soil is leaked into the soil screening cage (703a) through the "Y" shaped groove (704).

14. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 11, characterized in that, The conveying device b (706) includes a fifth motor (706a), a rotating shaft (706f), a conveyor belt b (706d), and a sixth motor (712). The conveyor belt b (706d) includes a soil screening and conveying section (706b), an upward conveying section (706c), and a soil conveying section (706e) arranged in sequence. The fifth motor (706a) is connected to the shaft (706f) of the soil screening and conveying section (706b) via a sprocket, and the sixth motor (712) is connected to the shaft (706f) of the soil conveying section (706e) via a sprocket. The fifth motor (706a) and the sixth motor (712) simultaneously drive the conveyor belt b (706d) for conveying operations.

15. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 11, characterized in that, The soil screening device (703) includes a soil screening cage (703a), a drive mechanism, a support (703e), and a U-shaped plate (703c). The soil sieve cage (703a) is mounted on the support (703e); the soil sieve cage (703a) has evenly distributed circular sieve holes around its circumference, and the soil sieve cage (703a) is arranged at an angle. The end outlet of the soil screening cage (703a) is provided with a U-shaped plate (703c), which transports the soil to the conveying device b (706); the driving mechanism is connected to the soil screening cage (703a) and drives the soil screening cage (703a) to rotate.

16. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 15, characterized in that, The drive mechanism includes a second pulley (703b), a fourth motor (703d), a reducer, a pinion, and a large gear plate; Both sides of the sieve cage (703a) are respectively provided with large gear plates and second pulleys (703b); the fourth motor (703d) is connected to the reducer and installed at one end of the sieve cage (703a). The reducer is connected to a small gear, which meshes with a large gear plate on one side, and the large gear plate on the other side slides with the two second pulleys (703b); the fourth motor (703d) drives the sieve cage (703a) to rotate.

17. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 15, characterized in that, The bottom of the bracket (703e) is provided with a leveling device (705); the leveling device (705) includes leveling device 1 (705a), leveling device 2 (705b), leveling device 3 (705c) and leveling device 4 (705d).

18. The whole-tray air-suction precision rice seedling raising and sowing production line according to claim 11, characterized in that, It also includes a recycling bin (709); The top of the recycling bin (709) is connected to the second high-pressure blower (707), and the bottom of the recycling bin (709) is provided with a recycling storage bin (713); the air outlet valve of the second high-pressure blower (707) is connected to the first air pressure rod (708), which is used to adjust the opening of the air outlet valve; the outlet of the recycling storage bin (713) is provided with a soil discharge baffle, and the soil discharge baffle is provided with a second air pressure rod (711), which is used to adjust the opening of the soil discharge baffle.

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