Seed buoyancy separation equipment

Abstract

The utility model belongs to the technical field of seed sorting, and particularly relates to seed buoyancy sorting equipment which comprises a sorting box, a plurality of first rotating rods which are arranged in an inclined mode are rotationally connected to the upper portion in the sorting box, and the two ends of each first rotating rod penetrate through the sorting box. First filter screen plates are fixedly connected to the outer sides of the first rotating rods, and the multiple first filter screen plates are obliquely arranged in a straight line. A second rotating rod is rotationally connected to the lower portion in the sorting box, and the two ends of the second rotating rod penetrate through the sorting box. After the first motor is stopped, the second filter screen plate stops rotating at the same time, the second filter screen plate is in an inclined state, at the moment, a valve is opened, water flows out of the sorting box, after the water flows out of the sorting box, a closing plate is opened, and the sorted seeds and impurities can fall out of a first discharging port and a second discharging port under the action of gravity; therefore, the number of operation steps is reduced, and the workload of workers is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of seed sorting, in particular to a seed buoyancy sorting device. Background Art

[0002] Seed buoyancy sorting equipment is a device used in agriculture and seed processing. It separates light impurities from seeds by utilizing the buoyancy difference between seeds and impurities of different densities.

[0003] The patent with application number 202121014509.3 discloses a larch seed sorter, including a solution box and a sorting box, a fixed plate is fixedly connected to the surface of the solution box, a first threaded rod is threadedly connected to the inner wall of the fixed plate, one end of the first threaded rod is rotatably connected to a brake pad through a bearing, a push handle is fixedly connected to the top of the solution box, a servo motor is fixedly installed on one side of the sorting box, a second threaded rod is fixedly connected to the output end of the servo motor, a movable partition is threadedly connected to the surface of the second threaded rod, a fixed partition is fixedly installed on the inner side wall of the solution box, and a filter is fixedly connected to the inner wall of the sorting box; by placing seeds into the sorting box and then immersing the sorting box in the solution box filled with solution, the seeds are quickly divided into upper and lower groups under the action of buoyancy, and then the servo motor is started to move the movable partition and cooperate with the fixed partition to separate the inside of the sorting box into upper and lower layers, so as to realize rapid sorting of seeds with higher efficiency and effectively avoid scratching of seeds, which is very convenient for use.

[0004] In the current existing technology, although the above scheme can realize the rapid sorting of seeds, after the seed sorting is completed, it is necessary to take the sorting box out of the solution box by lifting the handle to collect the sorted seeds and impurities separately. This involves many steps and increases the workload of the staff.

[0005] Therefore, a seed buoyancy sorting device is proposed to solve the above problems. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned problems, a seed buoyancy sorting device is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: the seed buoyancy sorting equipment described in the utility model includes a sorting box, wherein a plurality of obliquely arranged No. 1 rotating rods are rotatably connected to the upper part of the sorting box, and both ends of the No. 1 rotating rods pass through the sorting box; a No. 1 filter plate is fixedly connected to the outer side of the No. 1 rotating rod, and the plurality of No. 1 filter plates are obliquely arranged in a straight line; a No. 2 rotating rod is rotatably connected to the lower part of the sorting box, and both ends of the No. 2 rotating rod pass through the sorting box; a No. 2 filter plate is fixedly connected to the outer side of the No. 2 rotating rod; the positions of the No. 1 filter plate and the No. 2 filter plate corresponding to the sorting box are A discharge port No. 1 and a discharge port No. 2 are respectively provided; a water outlet pipe is fixedly connected to the bottom of the sorting box; a valve is fixedly connected to the middle of the water outlet pipe; a rotating assembly is arranged at the position corresponding to the No. 1 filter plate and the No. 2 filter plate on the outside of the sorting box, and the rotating assembly includes a plurality of No. 1 sprockets, a No. 1 chain, a No. 2 sprocket, a No. 2 chain and a No. 3 sprocket; the No. 1 chain is rotatably connected to the outside of the No. 1 sprocket; the No. 2 chain is fixedly connected to the outside of the No. 2 sprocket and the No. 3 sprocket; a closing assembly is arranged at the position corresponding to the No. 1 discharge port and the No. 2 discharge port on the outside of the sorting box, and the closing assembly is used to close the No. 1 discharge port and the No. 2 discharge port.

[0008] Preferably, the plurality of No. 1 sprockets are respectively fixedly connected to one end of the No. 1 rotating rod; the No. 2 sprocket is fixedly connected to a side of the No. 1 sprocket away from the No. 1 rotating rod; the No. 3 sprocket is fixedly connected to an end of the No. 2 rotating rod close to the No. 1 sprocket; the rotating assembly also includes a No. 1 motor, and the No. 1 motor is arranged at a position corresponding to the No. 1 sprocket; the output end of the No. 1 motor is fixedly connected to the No. 1 rotating shaft, and the end of the No. 1 rotating shaft away from the No. 1 motor is fixedly connected to one of the No. 1 sprockets.

[0009] Preferably, the closing assembly includes two closing plates, and the two closing plates are respectively arranged at the No. 1 discharge port and the No. 2 discharge port; a connecting rod is respectively fixed between the two closing plates; a rack is fixed to the top of one of the closing plates; a gear is meshed on the outside of the rack; a No. 2 rotating shaft is fixed to the middle of the gear on the side away from the sorting box; a No. 2 motor is arranged at the position of the No. 2 rotating shaft on the outside of the sorting box corresponding to the No. 2 rotating shaft, and the No. 2 rotating shaft is fixed to the output end of the No. 2 motor.

[0010] Preferably, symmetrically arranged L-shaped positioning plates are fixedly connected to the positions of the closing plates on the outside of the sorting box, and the closing plates are slidably connected between the two L-shaped positioning plates.

[0011] Preferably, one end of the No. 1 rotating rod away from the No. 1 sprocket is fixedly connected to a No. 1 positioning ring; and both ends of the No. 2 rotating rod are respectively fixedly connected to a No. 2 positioning ring.

[0012] Preferably, an L-shaped mounting plate No. 1 is fixedly connected to the position of motor No. 1 on the outside of the sorting box, and motor No. 1 is fixedly connected inside the L-shaped mounting plate No. 1; a L-shaped mounting plate No. 2 is fixedly connected to the position of motor No. 2 on the outside of the sorting box, and motor No. 2 is fixedly connected inside the L-shaped mounting plate No. 2.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a seed buoyancy sorting device. When sorting seeds, water and seeds are added into the sorting box respectively. After adding, the seeds are left to stand for a period of time. After a period of time, the full seeds will be located below the sorting box and above the second filter plate. The unfull seeds and impurities will float on the surface of the water. After sorting, the No. 1 motor is started, the No. 1 motor drives the No. 1 rotating shaft to rotate, the No. 1 rotating shaft rotates to drive one of the No. 1 sprockets to rotate, the rotation of one of the sprockets drives the No. 1 chain to rotate, and under the action of the No. 1 chain, the remaining No. 1 sprockets will rotate synchronously, and the No. 1 sprocket will drive the No. 1 filter plate to rotate during the rotation process. When all the No. 1 filter plates rotate, the No. 1 filter plate rotates. When the movement is linear and inclined, stop motor No. 1. During the rotation of sprocket No. 1, it will drive sprocket No. 2 to rotate, the rotation of sprocket No. 2 will drive chain No. 2 to rotate, the rotation of chain No. 2 will drive sprocket No. 3 to rotate, the rotation of sprocket No. 3 will drive filter plate No. 2 to rotate. After motor No. 1 stops, filter plate No. 2 stops rotating at the same time, and filter plate No. 2 is in an inclined state. At this time, open the valve to allow water to flow out of the sorting box. After the water flows out of the sorting box, open the closing plate again. After the sorting is completed, the seeds and debris will fall out from discharge port No. 1 and discharge port No. 2 respectively under the action of gravity, and fall into two collection boxes respectively, which reduces the operation steps and the workload of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 It is a three-dimensional diagram of the rotating assembly in the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the closed component in the utility model;

[0019] Figure 4 It is a three-dimensional diagram of the second positioning ring in the utility model;

[0020] Figure 5 It is a cross-sectional view of the utility model.

[0021] Legend:

[0022] 1. Sorting box; 11. Water outlet pipe; 12. Valve; 13. Discharge port No. 1; 14. Discharge port No. 2; 15. Rotating rod No. 1; 16. Filter plate No. 1; 17. Rotating rod No. 2; 18. Filter plate No. 2; 2. Sprocket No. 1; 21. Chain No. 1; 22. Motor No. 1; 23. Rotating shaft No. 1; 24. Sprocket No. 2; 25. Chain No. 2; 26. Sprocket No. 3; 27. L-shaped mounting plate No. 1; 3. Closing plate; 31. Connecting rod; 32. Rack; 33. Gear; 34. Motor No. 2; 35. Rotating shaft No. 2; 36. L-shaped positioning plate; 37. L-shaped mounting plate No. 2; 4. Collecting box; 5. Positioning ring No. 1; 51. Positioning ring No. 2. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Specific examples are given below.

[0025] See also Figure 1-Figure 5 The utility model provides a seed buoyancy sorting device, including a sorting box 1, wherein the upper part of the sorting box 1 is rotatably connected to a plurality of obliquely arranged No. 1 rotating rods 15, and both ends of the No. 1 rotating rod 15 penetrate the sorting box 1; a No. 1 filter plate 16 is fixedly connected to the outer side of the No. 1 rotating rod 15, and the plurality of No. 1 filter plates 16 are obliquely arranged in a straight line; a No. 2 rotating rod 17 is rotatably connected to the lower part of the sorting box 1, and both ends of the No. 2 rotating rod 17 penetrate the sorting box 1; a No. 2 filter plate 18 is fixedly connected to the outer side of the No. 2 rotating rod 17; the sorting box 1 is provided with a No. 1 discharge port 13 and a No. 2 discharge port 13 at positions corresponding to the No. 1 filter plate 16 and the No. 2 filter plate 18, respectively. 4; a water outlet pipe 11 is fixedly connected to the bottom of the sorting box 1; a valve 12 is fixedly connected to the middle of the water outlet pipe 11; a rotating assembly is arranged at the position of the No. 1 filter plate 16 and the No. 2 filter plate 18 on the outside of the sorting box 1, and the rotating assembly includes a plurality of No. 1 sprockets 2, No. 1 chains 21, No. 2 sprockets 24, No. 2 chains 25 and No. 3 sprockets 26; the No. 1 chain 21 is rotatably connected to the outside of the No. 1 sprocket 2; the No. 2 chain 25 is fixedly connected to the outside of the No. 2 sprockets 24 and the No. 3 sprockets 26; a closing assembly is arranged at the position of the No. 1 discharge port 13 and the No. 2 discharge port 14 on the outside of the sorting box 1, and the closing assembly is used to close the No. 1 discharge port 13 and the No. 2 discharge port 14.

[0026] During operation, when sorting seeds, water and seeds are added to the sorting box 1 respectively, and left to stand for a period of time. After a period of time, the full seeds will be below the sorting box 1 and above the No. 2 filter plate 18, and the unfull seeds and impurities will float on the surface of the water. After sorting, the No. 1 sprocket 2 is rotated, and the No. 1 sprocket 2 will drive the No. 1 filter plate 16 to rotate during the rotation process. When all the No. 1 filter plates 16 rotate in a straight line and are in an inclined state, they stop rotating. During the rotation of the No. 1 sprocket 2, the No. 2 sprocket 24 will be driven to rotate, and the rotation of the No. 2 sprocket 24 will drive the No. 2 filter plate 16 to rotate. The No. 1 chain 25 rotates, the No. 2 chain 25 rotates to drive the No. 3 sprocket 26 to rotate, the No. 3 sprocket 26 rotates to drive the No. 2 filter plate 18 to rotate, after the No. 1 filter plate 16 stops rotating, the No. 2 filter plate 18 also stops rotating, and the No. 2 filter plate 18 is in an inclined state. At this time, the valve 12 is opened to allow water to flow out of the sorting box 1. After the water flows out of the sorting box 1, the closing plate 3 is opened again. After the sorting is completed, the seeds and debris will fall out from the No. 1 discharge port 13 and the No. 2 discharge port 14 respectively under the action of gravity, and fall into the two collection boxes 4 respectively, which reduces the operation steps and reduces the workload of the staff.

[0027] Further, such as Figure 1 and Figure 2 As shown, the plurality of No. 1 sprockets 2 are respectively fixedly connected to one end of the No. 1 rotating rod 15; the No. 2 sprocket 24 is fixedly connected to the side of one of the No. 1 sprockets 2 away from the No. 1 rotating rod 15; the No. 3 sprocket 26 is fixedly connected to one end of the No. 2 rotating rod 17 close to the No. 1 sprocket 2; the rotating assembly also includes a No. 1 motor 22, and the No. 1 motor 22 is arranged at a position corresponding to the No. 1 sprocket 2; the output end of the No. 1 motor 22 is fixedly connected to the No. 1 rotating shaft 23, and the end of the No. 1 rotating shaft 23 away from the No. 1 motor 22 is fixedly connected to one of the No. 1 sprockets 2.

[0028] During operation, when sorting seeds, water and seeds are added to the sorting box 1 respectively, and left to stand for a period of time. After a period of time, the full seeds will be below the sorting box 1 and above the No. 2 filter plate 18, and the unfull seeds and impurities will float on the surface of the water. After sorting, the No. 1 motor 22 is started, and the No. 1 motor 22 drives the No. 1 rotating shaft 23 to rotate, and the No. 1 rotating shaft 23 rotates to drive one of the No. 1 sprockets 2 to rotate, and the rotation of one of the sprockets drives the No. 1 chain 21 to rotate. Under the action of the No. 1 chain 21, the remaining No. 1 sprockets 2 will rotate synchronously, and the No. 1 sprocket 2 will drive the No. 1 filter plate 16 to rotate during the rotation process, and all No. 1 filter plates 16 rotate in a straight line and are in an inclined state. When the motor No. 1 22 is stopped, the No. 2 sprocket 2 will be driven to rotate during the rotation of the No. 1 sprocket 2, the No. 2 sprocket 24 will be driven to rotate, the No. 2 chain 25 will be driven to rotate, the No. 2 chain 25 will be driven to rotate the No. 3 sprocket 26, the No. 3 sprocket 26 will be driven to rotate the No. 2 filter plate 18, after the No. 1 motor 22 stops, the No. 2 filter plate 18 also stops rotating, and the No. 2 filter plate 18 is in an inclined state. At this time, the valve 12 is opened to allow water to flow out of the sorting box 1. After the water flows out of the sorting box 1, the closing plate 3 is opened again. The seeds and debris after sorting will fall out from the No. 1 discharge port 13 and the No. 2 discharge port 14 respectively under the action of gravity, and fall into the two collection boxes 4 respectively, which reduces the operation steps and the workload of the staff.

[0029] Further, such as Figure 1 , Figure 3 and Figure 5 As shown, the closing assembly includes two closing plates 3, and the two closing plates 3 are respectively arranged at the No. 1 discharge port 13 and the No. 2 discharge port 14; a connecting rod 31 is respectively fixed between the two closing plates 3; a rack 32 is fixed on the top of one of the closing plates 3; a gear 33 is meshed on the outer side of the rack 32; a No. 2 rotating shaft 35 is fixed to the middle part of the gear 33 away from the sorting box 1; a No. 2 motor 34 is arranged at the position of the No. 2 rotating shaft 35 on the outer side of the sorting box 1, and the No. 2 rotating shaft 35 is fixed to the output end of the No. 2 motor 34.

[0030] During operation, after the water inside the sorting box 1 is released, the No. 2 motor 34 is started, and the No. 2 motor 34 drives the No. 2 rotating shaft 35 to rotate, and the rotation of the No. 2 rotating shaft 35 drives the gear 33 to rotate, and the rotation of the gear 33 drives the rack 32 to rise, and the rising of the rack 32 drives the two closing plates 3 to rise, so that the No. 1 discharge port 13 and the No. 2 discharge port 14 are exposed, and the seeds and debris after sorting will fall out from the No. 1 discharge port 13 and the No. 2 discharge port 14 respectively, and fall into the two collecting boxes 4 respectively.

[0031] Further, such as Figure 1As shown, symmetrically arranged L-shaped positioning plates 36 are fixedly connected to the outer side of the sorting box 1 at the position corresponding to the closing plate 3, and the closing plate 3 is slidably connected between the two L-shaped positioning plates 36.

[0032] During operation, the closing plate 3 is slidably connected between the L-shaped positioning plates 36 through the L-shaped positioning plates 36 fixed to the outer side of the sorting box 1, so that the position of the closing plate 3 can be limited to prevent the closing plate 3 from shifting.

[0033] Further, such as Figure 2 and Figure 4 As shown, one end of the No. 1 rotating rod 15 away from the No. 1 sprocket 2 is fixedly connected to the No. 1 positioning ring 5; and both ends of the No. 2 rotating rod 17 are respectively fixedly connected to the No. 2 positioning rings 51.

[0034] During operation, the first filter plate 16 can be positioned by the first positioning ring 5 fixedly connected to the outer side of the first rotating rod 15 ; the second filter plate 18 can be positioned by the second positioning ring 51 fixedly connected to the outer side of the second rotating rod 17 .

[0035] Further, such as Figure 1 and Figure 5 As shown, a No. 1 L-shaped mounting plate 27 is fixedly connected to the position of the No. 1 motor 22 on the outside of the sorting box 1, and the No. 1 motor 22 is fixedly connected inside the No. 1 L-shaped mounting plate 27; a No. 2 L-shaped mounting plate 37 is fixedly connected to the position of the No. 2 motor 34 on the outside of the sorting box 1, and the No. 2 motor 34 is fixedly connected inside the No. 2 L-shaped mounting plate 37.

[0036] During operation, the No. 1 motor 22 can be installed through the No. 1 L-shaped mounting plate 27 fixedly connected to the outer side of the sorting box 1, so that the No. 1 motor 22 is fixed; the No. 2 motor 34 can be installed through the No. 2 L-shaped mounting plate 37 fixedly connected to the outer side of the sorting box 1, so that the No. 2 motor 34 is fixed.

[0037] Working principle:

[0038] When sorting seeds, water and seeds are added to the sorting box 1 respectively, and then left to stand for a period of time. After a period of time, the full seeds will be below the sorting box 1 and above the No. 2 filter plate 18, and the unfull seeds and impurities will float on the surface of the water. After sorting, start the No. 1 motor 22, the No. 1 motor 22 drives the No. 1 rotating shaft 23 to rotate, the No. 1 rotating shaft 23 rotates to drive one of the No. 1 sprockets 2 to rotate, and the rotation of one of the sprockets drives the No. 1 chain 21 to rotate. Under the action of the No. 1 chain 21, the remaining No. 1 sprockets 2 will rotate synchronously, and the No. 1 sprocket 2 will drive the No. 1 filter plate 16 to rotate during the rotation process. When all the No. 1 filter plates 16 rotate in a straight line and are in an inclined state, Stop the No. 1 motor 22. During the rotation of the No. 1 sprocket 2, the No. 2 sprocket 24 will be driven to rotate. The rotation of the No. 2 sprocket 24 will drive the No. 2 chain 25 to rotate. The rotation of the No. 2 chain 25 will drive the No. 3 sprocket 26 to rotate. The rotation of the No. 3 sprocket 26 will drive the No. 2 filter plate 18 to rotate. After the No. 1 motor 22 stops, the No. 2 filter plate 18 also stops rotating, and the No. 2 filter plate 18 is in a tilted state. At this time, open the valve 12 to allow water to flow out of the sorting box 1. After the water flows out of the sorting box 1, open the closing plate 3 again. After the sorting is completed, the seeds and debris will fall out from the No. 1 discharge port 13 and the No. 2 discharge port 14 respectively under the action of gravity, and fall into the two collection boxes 4 respectively, which reduces the operation steps and the workload of the staff.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A seed buoyancy sorting device, characterized in that: The invention comprises a sorting box (1), wherein a plurality of obliquely arranged No. 1 rotating rods (15) are rotatably connected to the upper part of the sorting box (1), and both ends of the No. 1 rotating rods (15) penetrate the sorting box (1); a No. 1 filter plate (16) is fixedly connected to the outer side of the No. 1 rotating rod (15), and the plurality of No. 1 filter plates (16) are arranged obliquely in a straight line; a No. 2 rotating rod (17) is rotatably connected to the lower part of the sorting box (1), and both ends of the No. 2 rotating rod (17) penetrate the sorting box (1); a No. 2 filter plate (18) is fixedly connected to the outer side of the No. 2 rotating rod (17); a No. 1 discharge port (13) and a No. 2 discharge port (14) are respectively provided in the sorting box (1) at positions corresponding to the No. 1 filter plate (16) and the No. 2 filter plate (18); a water outlet pipe (11) is fixedly connected to the bottom of the sorting box (1); a water outlet pipe (11) is fixedly connected to the middle of the water outlet pipe (11); A valve (12) is connected; a rotating assembly is arranged at the position corresponding to the first filter plate (16) and the second filter plate (18) on the outside of the sorting box (1), and the rotating assembly includes a plurality of first sprockets (2), a first chain (21), a second sprocket (24), a second chain (25) and a third sprocket (26); the first chain (21) is rotatably connected to the outside of the first sprocket (2); the second chain (25) is fixedly connected to the outside of the second sprocket (24) and the third sprocket (26); a closing assembly is arranged at the position corresponding to the first discharge port (13) and the second discharge port (14) on the outside of the sorting box (1), and the closing assembly is used to close the first discharge port (13) and the second discharge port (14); and a collecting box (4) is fixedly connected to the positions corresponding to the first discharge port (13) and the second discharge port (14) on the outside of the sorting box (1).

2. A seed buoyancy sorting device according to claim 1, characterized in that: The plurality of No. 1 sprockets (2) are respectively fixedly connected to one end of a No. 1 rotating rod (15); the No. 2 sprocket (24) is fixedly connected to a side of one of the No. 1 sprockets (2) away from the No. 1 rotating rod (15); the No. 3 sprocket (26) is fixedly connected to an end of the No. 2 rotating rod (17) close to the No. 1 sprocket (2); the rotating assembly further comprises a No. 1 motor (22), and the No. 1 motor (22) is arranged at a position corresponding to the No. 1 sprocket (2); the output end of the No. 1 motor (22) is fixedly connected to a No. 1 rotating shaft (23), and an end of the No. 1 rotating shaft (23) away from the No. 1 motor (22) is fixedly connected to one of the No. 1 sprockets (2).

3. A seed buoyancy sorting device according to claim 2, characterized in that: The closing assembly comprises two closing plates (3), and the two closing plates (3) are respectively arranged at the first discharge port (13) and the second discharge port (14); a connecting rod (31) is respectively fixed between the two closing plates (3); a rack (32) is fixedly connected to the top of one of the closing plates (3); a gear (33) is meshed on the outer side of the rack (32); a second rotating shaft (35) is fixedly connected to the middle of the gear (33) away from the sorting box (1); a second motor (34) is arranged at a position corresponding to the second rotating shaft (35) on the outer side of the sorting box (1), and the second rotating shaft (35) is fixedly connected to the output end of the second motor (34).

4. A seed buoyancy sorting device according to claim 3, characterized in that: A symmetrically arranged L-shaped positioning plate (36) is fixedly connected to the outer side of the sorting box (1) at a position corresponding to the closing plate (3), and the closing plate (3) is slidably connected between the two L-shaped positioning plates (36).

5. A seed buoyancy sorting device according to claim 4, characterized in that: One end of the first rotating rod (15) away from the first sprocket (2) is fixedly connected to a first positioning ring (5); and both ends of the second rotating rod (17) are respectively fixedly connected to second positioning rings (51).

6. A seed buoyancy sorting device according to claim 5, characterized in that: A first L-shaped mounting plate (27) is fixedly connected to a position of the first motor (22) on the outside of the sorting box (1), and the first motor (22) is fixedly connected inside the first L-shaped mounting plate (27); a second L-shaped mounting plate (37) is fixedly connected to a position of the second motor (34) on the outside of the sorting box (1), and the second motor (34) is fixedly connected inside the second L-shaped mounting plate (37).

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