Seed seedling raising system and seed seedling raising control method

Abstract

The invention belongs to the technical field of agricultural seed cultivation, and particularly relates to a seed seedling raising system and a seed seedling raising control method.The seed seedling raising system comprises a shell, a seedling raising area and a screening area are arranged in the shell from top to bottom in the vertical direction, the screening area comprises a screening groove, and a feeding opening is formed in the upper portion of the screening groove; the screening groove is of an inverted circular truncated cone structure, clear water is injected into the screening groove, a containing groove is vertically formed in the bottom of the screening groove, a lifting assembly is movably arranged in the containing groove in the vertical direction, and the lifting assembly is used for lifting seeds at the bottom of the screening groove to a seedling raising area in the vertical direction; a collecting unit is arranged on one side of the flotation opening, and a circulating unit is arranged between the screening groove and the collecting unit. Wizened seeds can be automatically discharged, the functions of automatic conveying and automatic sowing of the seeds can be achieved, the working intensity is reduced, and the seedling raising efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural seed cultivation, and in particular relates to a seed seedling raising system and a seed seedling raising control method. Background Art

[0002] The seedling raising of crop seeds starts from harvesting seeds and includes processes such as screening, drying, storage and breeding. Different processes require the use of different equipment, and all equipment together constitute the seed seedling raising system. The early stage of seed seedling raising is very critical. Most seeds need to be stored after harvesting and then bred the following year. This places high demands on the storage device used to store seeds, and it is necessary to ensure that the seeds are stored under constant temperature conditions.

[0003] In a Chinese invention patent application with application publication number CN117999994A and application publication date 2024.05.10, a temperature-controlled storage device for agricultural seed cultivation is disclosed, comprising: a temperature-controlled box, the temperature-controlled box is a square box, the temperature-controlled box is provided with a door panel for opening and closing the temperature-controlled box, and the door panel is connected to the interior of the box body of the temperature-controlled box; a support frame, the support frame is arranged on the outside of the temperature-controlled box, and the support frame is used to reinforce the outside of the temperature-controlled box as a whole; a temperature control device, the temperature control device is arranged on the temperature-controlled box The outside of the temperature control box is connected with the inside of the temperature control box, and the temperature control device is used to control and balance the internal temperature of the temperature control box; a photovoltaic power generation component, the photovoltaic power generation component is arranged on the top of the supporting frame, the photovoltaic power generation component is electrically connected with the temperature control device, and the photovoltaic power generation component is used to generate electricity using solar energy; a central controller, the central controller is arranged on the temperature control box, and the central controller is electrically connected with the temperature control device and the photovoltaic power generation component respectively; wherein, the photovoltaic power generation component is a double-sided opening and closing structure.

[0004] The storage device can regulate the temperature according to the needs of storage and breeding. When the stored seeds are taken out for breeding in the next year, the seeds need to be screened for a second time, and the dried seeds are sown in the cultivation device. The existing screening method is to screen the seeds by flotation. Specifically, during the screening, the seeds are sprinkled in the water. If the seeds are shriveled, the seeds will float on the water surface. If the seeds are full, the seeds will sink to the bottom of the water. In this way, high-quality seeds can be screened out, and then the screened seeds are planted for seedling cultivation. However, the existing seedling equipment and screening equipment are mostly dispersed, and the seedling equipment only has the function of storage and cultivation. After the screening equipment screens the seeds, it is still necessary to manually carry the seeds and sprinkle the seeds in the seedling area of ​​the seedling equipment. The workload is large and the efficiency is low. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a seed seedling raising system and a seed seedling raising control method in view of the deficiencies in the prior art. In the present invention, shriveled seeds can be automatically discharged, and the functions of automatic seed transportation and automatic sowing can be realized, thereby reducing work intensity and improving seedling raising efficiency.

[0006] To solve the problems of the prior art, the present invention provides a seed seedling raising system, comprising a shell, wherein a seedling raising area and a screening area are arranged in the shell from top to bottom along the vertical direction, the screening area comprises a screening trough, a feeding port is arranged at the upper part of the screening trough, seeds to be screened are put into the screening trough from the feeding port, the screening trough is an inverted truncated cone-shaped structure, clean water is injected into the screening trough, a placement trough is vertically opened at the bottom of the screening trough, a lifting component is arranged in the placement trough for movement along the vertical direction, the lifting component is used to lift the seeds at the bottom of the screening trough to the seedling raising area along the vertical direction, a flotation port is arranged below the feeding port, the flotation port is penetrated and opened on the side wall of the screening trough along the radial direction of the screening trough, a collecting unit is arranged on one side of the flotation port, the collecting unit is used to collect the seeds discharged through the flotation port, a circulation unit is arranged between the screening trough and the collecting unit, the circulation unit discharges the filtered clean water at the bottom of the collecting unit into the screening trough from the bottom of the screening trough, and when the circulation unit is in operation, the water level in the screening trough is higher than the bottom end surface of the flotation port.

[0007] Preferably, the seedling raising area is evenly arranged along the vertical direction with multiple seedling raising bins, which are annular structures, and the upper part of each seedling raising bin is evenly fixed with multiple radial partition plates around the axis of the seedling raising bin, the partition plates divide the seedling raising bin into multiple placement cavities, the projection of the placement cavity on the horizontal plane is a fan-shaped structure, and a seedling box that is adapted to its shape is slidably arranged in the placement cavity along the radial direction of the seedling raising bin.

[0008] Preferably, a sealing unit is provided above the placement groove to prevent the full seeds at the bottom of the screening groove from falling into the placement groove, the sealing unit comprises a sealing sleeve which moves in the vertical direction, when the sealing sleeve is at the lowest position, the bottom of the sealing sleeve contacts the bottom of the screening groove, the projection of the placement groove on the horizontal plane is within the projection of the sealing sleeve on the horizontal plane, a first threaded rod is vertically penetrated through the sealing sleeve, the first threaded rod is threadedly matched with the sealing sleeve, and a first rotating driver for driving the first threaded rod to rotate is provided at the end of the first threaded rod.

[0009] Preferably, the lifting assembly includes a lifting shell that is arranged in the placement groove and moves in the vertical direction, the upper part of the lifting shell is provided with an opening, and a sliding plate is arranged in the lifting shell that moves in the vertical direction. When the sliding plate is located at the bottom of the lifting shell, the upper part of the sliding plate and the lifting shell jointly form a collecting groove for receiving full seeds, and a plurality of filtering holes are distributed on the lifting shell and the sliding plate. An extension rod is vertically fixed at the bottom of the sliding plate, and the extension rod vertically penetrates the bottom of the lifting shell and slides with the lifting shell. There is a gap between the bottom of the extension rod and the bottom of the lifting shell, and a spring is vertically arranged in the gap, and both ends of the spring are fixedly connected to the lifting shell and the end of the extension rod respectively. A traction column is vertically fixed on the upper part of the sliding plate, and a winder is arranged on the upper part of the outer shell. A traction rope is wound around the winder, and the end of the traction rope is fixedly connected to the traction column.

[0010] Preferably, a sowing unit is provided in the seedling raising area, and the sowing unit includes a lifting plate which moves in a vertical direction on one side of an inner ring of the seedling raising bin, and a sowing rod is provided on the lower part of the lifting plate so as to rotate around the axis of the seedling raising bin, and the length direction of the sowing rod is parallel to the radial direction of the seedling raising bin, and a rotating unit for driving the sowing rod to rotate is provided on the lifting plate, and a clamping block is provided on one side of the inner ring of the seedling raising bin so as to move in the radial direction of the seedling raising bin, and a clamping groove is provided on the side wall of the lifting shell, and the clamping block cooperates with the clamping groove.

[0011] Preferably, a plurality of sowing positions are uniformly preset in the vertical direction in the seedling raising area, and when the lifting plate moves in the vertical direction, the lifting plate stops at the plurality of sowing positions in sequence from bottom to top.

[0012] Preferably, a second threaded rod is vertically penetrated through the top of the shell, and a limiting groove is provided on the side wall of the second threaded rod. The second threaded rod slides and cooperates with the shell in the vertical direction through the limiting groove, and the bottom of the second threaded rod is rotatably cooperated with the upper part of the lifting plate. A rangefinder is vertically arranged on the lifting plate, and the detection end of the rangefinder faces vertically upward. A second driven gear is rotatably arranged on the shell, and the second driven gear is sleeved on the second threaded rod. The second driven gear is threadably cooperated with the second threaded rod, and a second driving gear is meshed on one side of the second driven gear. A third rotation driver for driving the second driving gear to rotate is provided at the upper end of the second driving gear.

[0013] Preferably, an annular electromagnetic driver is provided in the screening tank, and a push rod is provided at the lower part of the annular electromagnetic driver along the radial direction of the screening tank. The push rod rotates in the screening tank around the axis of the screening tank, and the height of the push rod is the same as the height of the flotation port.

[0014] Preferably, the collecting unit comprises a collecting shell fixedly mounted on the periphery of the screening tank, a filter screen is horizontally fixedly arranged in the collecting shell, both the collecting shell and the filter screen are annular structures, and the filter screen divides the collecting shell into an upper cavity and a lower cavity along the vertical direction.

[0015] The present invention also provides a seed seedling control method based on the seed seedling system, comprising the following steps: S1. The seeds are put into a screening tank filled with clean water from a feeding port. The shriveled seeds float on the water surface, and the plump seeds sink to the bottom of the screening tank and gather into a placement tank. The plump seeds are received by a lifting component located in the placement tank. S2, the circulation unit is started synchronously when feeding, and the circulation unit injects the clean water at the bottom of the collection unit into the screening tank from the lower part of the screening tank, so that the clean water in the screening tank flows vertically from bottom to top, flows out from the flotation port, and finally enters the collection unit. The flowing clean water drives the shrunken seeds floating on the water surface to the flotation port and falls into the collection unit. The collection unit intercepts the seeds, and the clean water falls into the bottom of the collection unit; S3, the lifting component starts after a rated time delay after feeding, and drives the full seeds to rise to the seedling area, and the sowing unit located in the seedling area sows the full seeds in the seedling area.

[0016] Beneficial effects of the present invention: 1. The present invention sets a screening tank, sets a lifting assembly at the bottom of the screening tank, and sets a collecting unit and a circulating unit on one side of the screening tank, so that the seeds falling into the screening tank are first screened by the clean water stored in the screening tank, the shriveled seeds float on the water surface, and the plump seeds fall to the bottom of the screening tank and gather in the placing tank. Under the action of the circulating unit, the clean water in the screening tank is always in a flowing state, and the flowing water flow drives the shriveled seeds floating on the water surface to the flotation port, and the shriveled seeds are discharged from the flotation port into the collecting unit. After the collecting unit intercepts the shriveled seeds, the filtered Clean water falls into the bottom of the collecting unit, and the circulation unit injects the clean water at the bottom of the collecting unit into the screening slot again, so that the shriveled seeds can be automatically discharged, and the seeds entering the placement slot are taken over by the lifting component, which is started according to the rated time to lift the seeds in the vertical direction, so that the seeds are moved from the screening area to the seedling area, thus completing the automatic seed transportation function. At the same time, a sowing unit is arranged in the seedling area, and the sowing unit sows the seeds that rise to the seedling area in the seedling area, thus also realizing the function of automatic sowing, reducing the work intensity and improving the seedling efficiency; 2. The present invention provides a lifting shell, a sliding plate and a sowing unit, so that during the sowing process, the sliding plate can continuously squeeze out the seeds in the lifting shell, and at the same time, the rotation speed of the sowing rod in the sowing unit gradually increases with the squeezing of the seeds. When the rotation speed is slow, the sowing rod sows the seeds near the center of the seedling chamber, and as the rotation speed of the sowing rod gradually increases, the seeds are sown farther, so that the seeds can be automatically and evenly sown in the seedling chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a seed seedling raising system of the present invention.

[0018] Figure 2 yes; Figure 1 Enlarged view of point A in the middle.

[0019] Figure 3 It is a schematic diagram of the cross-section structure when a lifting component in a seed seedling raising system of the present invention is located in a placement groove.

[0020] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0021] Figure 5 It is a side view structural schematic diagram of a seed seedling raising system of the present invention when a lifting component rises to a seedling raising area.

[0022] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of CC.

[0023] Figure 7 It is a schematic diagram of the cross-section structure when a lifting component in a seed seedling raising system of the present invention rises to a seedling raising area.

[0024] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0025] Fig. 9 yes Figure 7 Enlarged view of point E in the middle.

[0026] Fig.10 It is a partial three-dimensional structural schematic diagram of a seed seedling raising system of the present invention.

[0027] The numbers in the figure are: 1. Shell; 2. Seedling area; 21. Seedling chamber; 211. Water spray pipe; 22. Partition plate; 23. Seedling box; 24. Sowing unit; 241. Lifting plate; 242. Sowing rod; 243. Rotating unit; 2431. Second rotary drive; 2432. First driving gear; 2433. First driven gear; 244. Clamping block; 245. Second threaded rod; 246. Distance meter; 247. Second driven gear; 248. Second driving gear; 249. Third rotary drive; 3. Screening area; 31. Screening slot; 32. Placement slot; 33, lifting assembly; 331, lifting shell; 332, sliding plate; 333, traction column; 334, traction rope; 335, winder; 336, extension rod; 337, spring; 34, flotation port; 341, annular electromagnetic drive; 342, push rod; 35, circulation unit; 351, circulation pipe; 352, water pump; 353, one-way valve; 36, collection unit; 361, collection shell; 362, filter screen; 37, closing unit; 371, sealing sleeve; 372, first threaded rod; 373, first rotary drive. DETAILED DESCRIPTION

[0028] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Reference Figure 1 and Figure 3-Figure 5 A seed seedling raising system comprises a shell 1, in which a seedling raising area 2 and a screening area 3 are arranged vertically from top to bottom in the shell 1, the screening area 3 comprises a screening slot 31, a feeding port is arranged at the upper part of the screening slot 31, seeds to be screened are put into the screening slot 31 from the feeding port, the screening slot 31 is an inverted truncated cone structure, clean water is injected into the screening slot 31, a placing slot 32 is vertically opened at the bottom of the screening slot 31, a lifting component 33 is arranged in the placing slot 32 for movement in the vertical direction, and the lifting component 33 is used to lift the seeds at the bottom of the screening slot 31 to the seedling raising area along the vertical direction 2. A flotation port 34 is provided below the feeding port. The flotation port 34 is opened on the side wall of the screening tank 31 along the radial direction of the screening tank 31. A collecting unit 36 ​​is provided on one side of the flotation port 34. The collecting unit 36 ​​is used to collect the seeds discharged through the flotation port 34. A circulation unit 35 is provided between the screening tank 31 and the collecting unit 36. The circulation unit 35 discharges the filtered clean water at the bottom of the collecting unit 36 ​​into the screening tank 31 from the bottom of the screening tank 31. When the circulation unit 35 is in operation, the water level in the screening tank 31 is higher than the bottom end surface of the flotation port 34.

[0030] After the stored seeds are taken out, first, the seeds are quantitatively put into the screening tank 31. After the seeds enter the screening tank 31 through the feeding port, the shriveled seeds float on the water surface, and the plump seeds sink to the bottom of the screening tank 31. Since the screening tank 31 is an inverted truncated cone structure, it is ensured that the seeds sinking at the bottom of the screening tank 31 can be gathered to the center of the screening tank 31 under the action of gravity, and the placement tank 32 is located at the center of the screening tank 31. At this time, the lifting component 33 is located at the bottom of the placement tank 32. The seeds gathered at the center of the screening tank 31 fall into the placement tank 32 and are received by the lifting component 33. In order to enable the seeds floating on the water surface to move to the flotation port 34 for discharge, a collecting unit 36 ​​and a circulation unit 35 are set on one side of the flotation port 34. When the circulation unit 35 is stopped, the collecting unit 36 ​​is always The filter 31 is filled with water. At this time, the water level in the screening tank 31 is coplanar with the bottom end surface of the flotation port 34. When seeds are put into the screening tank 31, the circulation unit 35 is started. The circulation unit 35 draws the water stored at the bottom of the collecting unit 36 ​​into the screening tank 31, so that the water in the screening tank 31 will flow from bottom to top in the vertical direction, so that the water in the screening tank 31 overflows from the flotation port 34, and the flowing water flow drives the shriveled seeds floating on the water surface to the flotation port 34. In this way, the shriveled seeds pass through the flotation port 34 and fall into the collecting unit 36 ​​driven by the water flow. The collecting unit 36 ​​intercepts the shriveled seeds, and the water flow flowing into the collecting unit 36 ​​falls into the bottom of the collecting unit 36, so that the water in the screening tank 31 circulates, so that the screening tank 31 can discharge the shriveled seeds in time when screening the seeds. After the seeds are quantitatively put into the screening slot 31, the lifting component 33 is delayed to start according to the rated time, so that the lifting component 33 can receive enough seeds, and the lifting component 33 drives the seeds falling into the placement slot 32 to rise, so that the screened full seeds are moved vertically to the seedling area 2, thus realizing the function of automatically conveying the screened seeds, and at the same time, a sowing unit 24 is provided in the seedling area 2, and the sowing unit 24 sows the seeds rising to the seedling area 2 in the seedling area 2, thus realizing the function of automatic sowing. The present invention integrates screening and seedling raising, and the screened seeds can be conveyed to the seedling raising station, which reduces the work intensity and improves the work efficiency.

[0031] Reference Figure 6 and Figure 7 The seedling raising area 2 is evenly arranged with multiple seedling raising bins 21 along the vertical direction. The seedling raising bins 21 are of an annular structure. The upper part of each seedling raising bin 21 is evenly fixed with multiple radial partition plates 22 around the axis of the seedling raising bin 21. The partition plates 22 divide the seedling raising bin 21 into multiple placement cavities. The projection of the placement cavity on the horizontal plane is a fan-shaped structure. A seedling box 23 corresponding to the shape of the seedling raising bin 21 is slidably arranged in the placement cavity along the radial direction of the seedling raising bin 21.

[0032] During the seedling raising process, the staff can directly pull out a single seedling box 23 from the placement cavity to observe the seedling raising status. A water spray pipe 211 is arranged on the upper part of the seedling raising chamber 21, and a humidity detector is arranged in each seedling raising box 23. The seed seedling raising system also includes a controller. The controller controls the water spray pipe 211 to supply water to the seeds in the seedling raising box 23 in real time according to the humidity detection value fed back by the humidity detector, so as to ensure sufficient water supply during seedling raising.

[0033] Reference Figure 6 and Figure 7 A sealing unit 37 is arranged above the placement groove 32 to prevent the full seeds at the bottom of the screening groove 31 from falling into the placement groove 32. The sealing unit 37 includes a sealing sleeve 371 which moves in the vertical direction. When the sealing sleeve 371 is at the lowest position, the bottom of the sealing sleeve 371 contacts the bottom of the screening groove 31. The projection of the placement groove 32 on the horizontal plane is located within the projection of the sealing sleeve 371 on the horizontal plane. A first threaded rod 372 is vertically penetrated on the sealing sleeve 371. The first threaded rod 372 is threadedly matched with the sealing sleeve 371. A first rotating driver 373 for driving the first threaded rod 372 to rotate is arranged at the end of the first threaded rod 372.

[0034] If the closing unit 37 is not provided, after the lifting component 33 drives the full seeds to rise, some seeds that have not fallen into the placement groove 32 in time are still located at the bottom of the screening groove 31. In this way, some seeds will fall into the placement groove 32 after the lifting component 33 rises. When the lifting component 33 descends, the seeds that have fallen into the placement groove 32 will hinder the lifting component 33, which will not only squeeze the full seeds, but also cause the lifting component 33 to fail to reset normally.

[0035] Reference Figure 6-Figure 10 The lifting assembly 33 includes a lifting shell 331 which is arranged in the placement groove 32 for movement in the vertical direction. The upper part of the lifting shell 331 is provided with an opening. A sliding plate 332 is arranged in the lifting shell 331 for movement in the vertical direction. When the sliding plate 332 is located at the bottom of the lifting shell 331, the upper part of the sliding plate 332 and the lifting shell 331 jointly form a collecting groove for receiving full seeds. A plurality of filtering holes are distributed on the lifting shell 331 and the sliding plate 332. An extension rod 336 is vertically fixed at the bottom of the sliding plate 332. The extension rod 336 is vertically fixed at the bottom of the sliding plate 332. 36 vertically passes through the bottom of the lifting shell 331 and slides with the lifting shell 331. There is a gap between the bottom of the extension rod 336 and the bottom of the lifting shell 331. A spring 337 is vertically arranged in the gap. The two ends of the spring 337 are fixedly connected to the ends of the lifting shell 331 and the extension rod 336 respectively. A traction column 333 is vertically fixedly arranged on the upper part of the sliding plate 332. A winder 335 is arranged on the upper part of the outer shell 1. A traction rope 334 is wound inside the winder 335. The end of the traction rope 334 is fixedly connected to the traction column 333.

[0036] When the winder 335 reels the traction rope 334, the traction column 333 drives the sliding plate 332 to rise, and the sliding plate 332 provides support for the lifting shell 331 through the extension rod 336 and the spring 337, so that the lifting shell 331 rises together with the sliding plate 332, and the shape of the collecting trough can be kept unchanged. At the same time, filter holes are provided on the sliding plate 332 and the lifting shell 331. During the rising process of the sliding plate 332 and the lifting shell 331, excess water in the collecting trough can be discharged in time.

[0037] Reference Figure 7-Figure 10 : A sowing unit 24 is arranged in the seedling area 2, and the sowing unit 24 includes a lifting plate 241 which moves along the vertical direction on one side of the inner ring of the seedling chamber 21, and a sowing rod 242 is arranged on the lower part of the lifting plate 241 so as to rotate around the axis of the seedling chamber 21. The length direction of the sowing rod 242 is parallel to the radial direction of the seedling chamber 21, and a rotating unit 243 for driving the sowing rod 242 to rotate is arranged on the lifting plate 241, and a clamping block 244 is arranged on one side of the inner ring of the seedling chamber 21 so as to move along the radial direction of the seedling chamber 21, and a clamping groove is arranged on the side wall of the lifting shell 331, and the clamping block 244 cooperates with the clamping groove.

[0038] The rotating unit 243 includes a second rotation driver 2431, a first driving gear 2432 and a first driven gear 2433. The first driven gear 2433 is rotatably arranged at the bottom of the lifting plate 241. A plurality of sowing rods 242 are provided, and the plurality of sowing rods 242 are evenly and fixedly arranged at the bottom of the first driven gear 2433 around the axis of the first driven gear 2433. The first driving gear 2432 is meshed on one side of the first driven gear 2433. The upper end of the first driving gear 2432 is provided with a second rotation driver 2431 for driving the first driving gear 2432 to rotate. The second rotation driver 2431 is preferably a servo motor.

[0039] Reference Figure 1-Figure 10 : A plurality of sowing positions are uniformly preset in the vertical direction in the seedling raising area 2. When the lifting plate 241 moves in the vertical direction, the lifting plate 241 stops at the plurality of sowing positions in sequence from bottom to top.

[0040] Reference Figure 2 and Figure 8A second threaded rod 245 is vertically penetrated through the top of the shell 1, and a limiting groove is provided on the side wall of the second threaded rod 245. The second threaded rod 245 slides and cooperates with the shell 1 in the vertical direction through the limiting groove. The bottom of the second threaded rod 245 is rotatably cooperated with the upper part of the lifting plate 241. A rangefinder 246 is vertically arranged on the lifting plate 241, and the detection end of the rangefinder 246 faces vertically upward. A second driven gear 247 is rotatably arranged on the shell 1. The second driven gear 247 is sleeved on the second threaded rod 245, and the second driven gear 247 is threadedly cooperated with the second threaded rod 245. A second driving gear 248 is meshed on one side of the second driven gear 247, and a third rotation driver 249 for driving the second driving gear 248 to rotate is arranged at the upper end of the second driving gear 248.

[0041] The third rotary driver 249 is preferably a servo motor, and the distance meter 246 is used to monitor whether the lifting plate 241 moves to the spreading position. Since there are multiple sowing positions preset in the seedling area 2, after the lifting plate 241 reaches the sowing position, the lifting plate 241 stops moving. At this time, the winder 335 pulls the sliding plate 332 into the seedling area 2 through the traction rope 334. Since the volume of the collecting tank is constant, the weight of the full seeds in the collecting tank is constant, and the compression amount of the spring 337 is also constant, so the lifting shell 331 can rise stably and synchronously with the sliding plate 332. There are also multiple stop positions preset for the position of the lifting shell 331 in the vertical direction. After the lifting shell 331 rises to the stop position and stops, the clamping block 244 clamps the clamping groove, and at this time, the bottom of the sowing rod 242 contacts the upper part of the lifting shell 331, and then the winder 335 continues to run, and the traction rope 334 drives the sliding plate 332 to continue to rise, and the sliding plate 332 gradually lifts out the seeds in the lifting shell 331. Driven by the unit 243, the speed gradually increases. In this way, when the sowing rod 242 rotates at a low speed, the seeds are sown at a shorter distance. After the speed of the sowing rod 242 increases, the seeds are sown at a longer distance. In this way, the seeds are evenly sown in the seedling bin 21. When the sliding plate 332 rises to the upper end surface of the lifting shell 331, all the seeds in the collecting groove are discharged. At this time, the winder 335 releases the traction rope 334, and the lifting shell 331 descends and resets to the placement groove 32. The sealing sleeve 371 of the closed unit 37 rises, so that the full seeds in the screening groove 31 can fall smoothly into the lifting shell 331. After the lifting shell 331 is reset to the rated time, the lifting shell 331 rises again, and the cycle is repeated until all the seedling bins 21 in the seedling area 2 are sown, and the lifting shell 331 is reset to the placement groove 32 and stops moving.

[0042] Reference Figure 7An annular electromagnetic driver 341 is arranged in the screening tank 31, and a push rod 342 is arranged at the lower part of the annular electromagnetic driver 341 along the radial direction of the screening tank 31. The push rod 342 rotates in the screening tank 31 around the axis of the screening tank 31, and the height of the push rod 342 is the same as the height of the flotation port 34.

[0043] Through the action of the push rod 342 , the liquid level of the screening tank 31 fluctuates, so that the shrunken seeds can smoothly pass through the flotation port 34 .

[0044] Reference Figure 6 and Figure 7 The collecting unit 36 ​​comprises a collecting shell 361 fixedly mounted on the periphery of the screening tank 31, in which a filter screen 362 is horizontally fixedly arranged. Both the collecting shell 361 and the filter screen 362 are annular structures, and the filter screen 362 divides the collecting shell 361 into an upper cavity and a lower cavity along the vertical direction.

[0045] The upper cavity is used to place shrunken seeds, the lower cavity is used to collect clean water passing through the filter screen 362, and the circulation unit 35 pumps out the water in the lower cavity and discharges it into the screening tank 31. The circulation unit 35 includes a circulation pipe 351 that connects the bottom of the collection shell 361 with the lower part of the screening tank 31, and a water pump 352 is provided on the circulation pipe 351. A one-way valve 353 is also provided on the circulation pipe 351, and the one-way valve 353 allows the water in the collection shell 361 to flow into the screening tank 31. In this way, when the water pump 352 pumps the water in the collection shell 361 into the screening shell through the circulation pipe 351, it will not be easy to flow back.

[0046] The present invention also provides a seed seedling control method based on the seed seedling system, comprising the following steps: S1. The seeds are put into the screening tank 31 filled with clean water from the feeding port. The shriveled seeds float on the water surface, and the plump seeds sink to the bottom of the screening tank 31 and gather into the placement tank 32. The lifting component 33 located in the placement tank 32 receives the plump seeds. S2, the circulation unit 35 is started synchronously when feeding, and the circulation unit 35 injects the clean water at the bottom of the collecting unit 36 ​​from the lower part of the screening tank 31 into the screening tank 31, so that the clean water in the screening tank 31 flows from bottom to top in the vertical direction, and flows out from the flotation port 34, and finally discharged into the collecting unit 36, and the flowing clean water drives the shrunken seeds floating on the water surface to the flotation port 34 and falls into the collecting unit 36, and the collecting unit 36 ​​intercepts the seeds, and the clean water falls into the bottom of the collecting unit 36; S3, the lifting component 33 starts after a rated time delay after feeding, and drives the full seeds to rise to the seedling raising area 2, and the sowing unit 24 located in the seedling raising area 2 sows the full seeds in the seedling raising area 2.

[0047] The working principle of the present invention is as follows: after the stored seeds are taken out, first, the seeds are quantitatively put into the screening tank 31. After the seeds enter the screening tank 31 through the feeding port, the shriveled seeds float on the water surface, and the plump seeds sink to the bottom of the screening tank 31. Since the screening tank 31 is an inverted truncated cone structure, it is ensured that the seeds sinking at the bottom of the screening tank 31 can be gathered to the center of the screening tank 31 under the action of gravity, and the placement tank 32 is located at the center of the screening tank 31, and the lifting component 33 is located at the bottom of the placement tank 32 at this time. The seeds gathered at the center of the screening tank 31 fall into the placement tank 32 and are received by the lifting component 33. In order to enable the seeds floating on the water surface to move to the flotation port 34 for discharge, a collecting unit 36 ​​and a circulating unit 35 are set on one side of the flotation port 34. When the circulating unit 35 is in a stopped state, the collecting unit 36 ​​and the circulating unit 35 are in a stopped state. 36 is always filled with water. At this time, the water level in the screening tank 31 is coplanar with the bottom end surface of the flotation port 34. When seeds are put into the screening tank 31, the circulation unit 35 is started. The circulation unit 35 draws the water stored at the bottom of the collecting unit 36 ​​into the screening tank 31, so that the water in the screening tank 31 will flow from bottom to top in the vertical direction, so that the water in the screening tank 31 overflows from the flotation port 34, and the flowing water flow drives the shriveled seeds floating on the water surface to the flotation port 34. In this way, the shriveled seeds pass through the flotation port 34 and fall into the collecting unit 36 ​​driven by the water flow. The collecting unit 36 ​​intercepts the shriveled seeds, and the water flow flowing into the collecting unit 36 ​​falls into the bottom of the collecting unit 36, so that the water in the screening tank 31 circulates, so that the screening tank 31 can discharge the shriveled seeds in time when screening the seeds. After a quantitative amount of seeds are put into the screening slot 31, the lifting component 33 is started with a rated time delay, so that the lifting component 33 can accommodate enough seeds. The lifting component 33 drives the seeds that fall into the placement slot 32 to rise, so that the screened full seeds are moved vertically to the seedling area 2, thereby realizing the function of automatically transporting the screened seeds. At the same time, a sowing unit 24 is provided in the seedling area 2, and the sowing unit 24 sows the seeds that rise to the seedling area 2 in the seedling area 2, thereby realizing the function of automatic sowing.

[0048] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A seed raising system, comprising a housing (1), characterized in that: A seedling raising area (2) and a screening area (3) are arranged vertically from top to bottom in the housing (1). The screening area (3) comprises a screening trough (31). A feeding port is arranged at the top of the screening trough (31). Seeds to be screened are fed into the screening trough (31) from the feeding port. The screening trough (31) is an inverted truncated cone-shaped structure. Clean water is injected into the screening trough (31). A placement trough (32) is vertically provided at the bottom of the screening trough (31). A lifting assembly (33) is arranged in the placement trough (32) to move in the vertical direction. The lifting assembly (33) is used to lift the seeds at the bottom of the screening trough (31) to the seedling raising area (2) in the vertical direction. A lifting assembly (33) is arranged below the feeding port. A flotation port (34) is provided, and the flotation port (34) is opened on the side wall of the screening tank (31) along the radial direction of the screening tank (31). A collecting unit (36) is provided on one side of the flotation port (34), and the collecting unit (36) is used to collect seeds discharged through the flotation port (34). A circulation unit (35) is provided between the screening tank (31) and the collecting unit (36), and the circulation unit (35) discharges clean water filtered at the bottom of the collecting unit (36) from the bottom of the screening tank (31) into the screening tank (31). When the circulation unit (35) is in operation, the water level in the screening tank (31) is higher than the bottom end surface of the flotation port (34).

2. A seed raising system according to claim 1, characterized in that: The seedling raising area (2) is evenly arranged with a plurality of seedling raising bins (21) in a vertical direction. The seedling raising bins (21) are of an annular structure. A plurality of radial partition plates (22) are evenly and fixedly arranged on the upper part of each seedling raising bin (21) around the axis of the seedling raising bin (21). The partition plates (22) divide the seedling raising bin (21) into a plurality of placement cavities. The projection of the placement cavities on a horizontal plane is a fan-shaped structure. A seedling raising box (23) adapted to the shape of the seedling raising bin (21) is slidably arranged in the placement cavity along the radial direction of the seedling raising bin (21).

3. A seed seedling raising system according to claim 2, characterized in that: A sealing unit (37) is provided above the placement groove (32) to prevent full seeds at the bottom of the screening groove (31) from falling into the placement groove (32). The sealing unit (37) includes a sealing sleeve (371) that moves in a vertical direction. When the sealing sleeve (371) is at the lowest position, the bottom of the sealing sleeve (371) contacts the bottom of the screening groove (31). The projection of the placement groove (32) on the horizontal plane is located within the projection of the sealing sleeve (371) on the horizontal plane. A first threaded rod (372) is vertically penetrated on the sealing sleeve (371). The first threaded rod (372) is threadedly matched with the sealing sleeve (371). A first rotation driver (373) for driving the first threaded rod (372) to rotate is provided at the end of the first threaded rod (372).

4. A seed seedling raising system according to claim 3, characterized in that: The lifting assembly (33) comprises a lifting shell (331) which is arranged in a placement groove (32) for movement in a vertical direction. The upper portion of the lifting shell (331) is provided with an opening. A sliding plate (332) is arranged in the lifting shell (331) for movement in a vertical direction. When the sliding plate (332) is located at the bottom of the lifting shell (331), the upper portion of the sliding plate (332) and the lifting shell (331) together form a collecting groove for receiving full seeds. A vertical fixed groove is provided at the bottom of the sliding plate (332). An extension rod (336) is arranged, the extension rod (336) vertically passes through the bottom of the lifting shell (331) and is slidably matched with the lifting shell (331), there is a gap between the bottom of the extension rod (336) and the bottom of the lifting shell (331), and a spring (337) is arranged vertically in the gap, with two ends respectively fixedly connected to the lifting shell (331) and the extension rod (336), and a winding machine (335) for driving the lifting shell (331) to rise and fall is arranged on the upper part of the outer shell (1).

5. A seed raising system according to claim 4, characterized in that: A sowing unit (24) is provided in the seedling raising area (2), and the sowing unit (24) comprises a lifting plate (241) which moves in a vertical direction on one side of an inner ring of the seedling raising bin (21), a sowing rod (242) is provided at the lower part of the lifting plate (241) so as to rotate around the axis of the seedling raising bin (21), a rotating unit (243) for driving the sowing rod (242) to rotate is provided on the lifting plate (241), a clamping block (244) is provided on one side of the inner ring of the seedling raising bin (21) so as to move in a radial direction of the seedling raising bin (21), a clamping groove is provided on the side wall of the lifting shell (331), and the clamping block (244) cooperates with the clamping groove.

6. A seed raising system according to claim 5, characterized in that: A plurality of sowing positions are uniformly preset in the vertical direction in the seedling raising area (2); when the lifting plate (241) moves in the vertical direction, the lifting plate (241) stops at the plurality of sowing positions in sequence from bottom to top.

7. A seed raising system according to claim 6, characterized in that: A second threaded rod (245) is vertically penetrated through the top of the housing (1), a limiting groove is provided on the side wall of the second threaded rod (245), the second threaded rod (245) is slidably engaged with the housing (1) in a vertical direction through the limiting groove, the bottom of the second threaded rod (245) is rotationally engaged with the upper part of the lifting plate (241), a distance meter (246) is vertically arranged on the lifting plate (241), the detection end of the distance meter (246) is vertically facing upward, and a third rotation driver (249) for driving the second threaded rod (245) to rotate is arranged on one side of the second threaded rod (245).

8. A seed raising system according to claim 7, characterized in that: An annular electromagnetic driver (341) is arranged in the screening tank (31), and a push rod (342) is arranged at the lower part of the annular electromagnetic driver (341) along the radial direction of the screening tank (31). The push rod (342) rotates in the screening tank (31) around the axis of the screening tank (31), and the height of the push rod (342) is the same as the height of the flotation port (34).

9. A seed raising system according to claim 8, characterized in that: The collecting unit (36) comprises a collecting shell (361) fixedly sleeved on the periphery of the screening tank (31), a filter screen (362) being fixedly arranged horizontally in the collecting shell (361), and both the collecting shell (361) and the filter screen (362) are annular structures.

10. A seed seedling control method based on a seed seedling system according to any one of claims 1 to 9, characterized in that: The steps include: S1. Seeds are dropped from a feeding port into a screening tank (31) filled with clean water. The shrunken seeds float on the water surface, and the plump seeds sink to the bottom of the screening tank (31) and gather into a placement tank (32). The plump seeds are received by a lifting assembly (33) located in the placement tank (32); S2, the circulation unit (35) is started synchronously with feeding, and the circulation unit (35) injects the clean water at the bottom of the collection unit (36) from the lower part of the screening tank (31) into the screening tank (31), so that the clean water in the screening tank (31) flows from bottom to top in a vertical direction, flows out from the flotation port (34), and finally enters the collection unit (36). The flowing clean water drives the shrunken seeds floating on the water surface to the flotation port (34) and falls into the collection unit (36). The collection unit (36) intercepts the seeds, and the clean water falls into the bottom of the collection unit (36); S3, the lifting component (33) starts after a rated delay after feeding, and drives the full seeds to rise to the seedling raising area (2), and the sowing unit (24) located in the seedling raising area (2) sows the full seeds in the seedling raising area (2).

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