Wind powered reciprocating seed screening apparatus

Abstract

The utility model relates to a wind force reciprocating type seed screening equipment relates to seed screening technical field, solved the technical problem of the separation effect is not good and easy to cause the damage of equipment inside, including screening chassis, upper processing frame, upper screening frame and lower screening frame, there is one -level big sundry filter plate, upper one -level inclined plate, two -level big sundry filter plate and upper two -level inclined plate in upper screening frame, there is one -level small sundry filter plate, lower one -level inclined plate, two -level small sundry filter plate, lower two -level inclined plate and lower three -level inclined plate in lower screening frame, the inside rotating joint of screening chassis has the drive shaft, and the surface fixed mounting of drive shaft has multiple eccentric wheels, and the connecting frame is hinged on the eccentric wheel, and the one end of connecting frame is hinged and is fixedly installed on the mounting frame of lower screening frame and upper screening frame, the utility model discloses a big sundry filter plate, two -level screen big sundry, cooperate one -level big sundry material frame, two -level big sundry material frame, main big sundry material frame concentrate sundry, avoid the interference of subsequent screening, improve the efficiency.

Description

Technical Field

[0001] This utility model relates to the field of seed screening technology, specifically a wind-powered reciprocating seed screening device. Background Technology

[0002] Seed screening equipment is a type of specialized mechanical equipment used in agriculture and the seed industry to precisely separate, grade, and purify seeds based on their physical characteristics (such as particle size, specific gravity, color, plumpness, impurity content, etc.) or biological characteristics. Its core function is to remove impurities such as shriveled seeds, broken seeds, weed seeds, and mud from the seeds, and to screen out high-quality seeds with uniform particle size, high plumpness, and strong vigor, thereby improving seed purity and germination rate, laying the foundation for subsequent sowing, breeding, or seed processing (such as packaging and storage).

[0003] Currently, seed screening typically involves placing the seeds on a vibrating screen of a screening device. Once the device is started, continuous vibration causes the seeds to move across the screen surface. Utilizing the difference in pore size between different screen sizes, healthy seeds meeting the particle size requirements pass through the sieve holes and fall, while shriveled seeds, broken seeds, weed seeds, and impurities such as mud and sand are left on the screen and discharged, thus separating the seeds from the impurities. However, this screening method makes it difficult to collect the separated components, resulting in a less than ideal separation effect. Meanwhile, in seed screening operations, the feeding and screening processes need to maintain a certain degree of sealing. During feeding, the sealing design can prevent debris and dust generated during seed dumping from escaping, which not only protects the health of operators but also reduces dust adhesion to surrounding equipment, while maintaining the cleanliness of the work area and improving the environmental friendliness and standardization of the screening process. However, most existing equipment can only restrict debris and dust but cannot effectively treat dust, which can easily cause damage to the internal parts of the equipment.

[0004] Based on this, the present invention provides a wind-powered reciprocating seed screening device to solve the above problems. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, this utility model provides a wind-powered reciprocating seed screening device. This utility model has an ingenious structure and focuses on practicality, effectively solving the technical problems of poor separation effect and easy damage to the internal parts of the equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A wind-powered reciprocating seed screening device includes a screening base frame, an upper processing frame fixedly installed on the screening base frame, and an upper screening frame and a lower screening frame slidably connected within the screening base frame. The upper screening frame has a primary large impurity filter plate, an upper inclined plate, a secondary large impurity filter plate, and an upper secondary inclined plate fixedly installed sequentially from top to bottom on its inner side. The lower screening frame has a primary small impurity filter plate, a lower inclined plate, a secondary small impurity filter plate, a lower secondary inclined plate, and a lower tertiary inclined plate fixedly installed sequentially from top to bottom on its inner side. Both the upper and lower screening frames have two feed inlets fixedly installed on their inner sides, one above the primary large impurity filter plate and the other above the primary small impurity filter plate. A drive shaft is rotatably connected to the inner side of the screening base frame. Multiple sets of eccentric wheels are fixedly installed on the surface of the drive shaft. Connecting frames are hinged to the eccentric wheels, and one end of the connecting frame is hinged to a mounting frame fixedly installed on the lower and upper screening frames.

[0007] Preferably, the upper screening rack is fixedly installed with a primary large impurity rack, a secondary large impurity rack, and a main large impurity rack from top to bottom. The primary large impurity rack is located below the primary large impurity filter plate, and the secondary large impurity rack is located below the secondary large impurity filter plate. The lower screening rack is provided with an upper transmission rack located below the upper inclined plate. The main large impurity rack is connected to the primary and secondary large impurity racks through openings at both ends. The lower screening rack is fixedly installed with a primary small impurity rack, a secondary small impurity rack, and a main small impurity rack from top to bottom. The primary small impurity rack is located below the lower inclined plate, and the secondary small impurity rack is located below the lower secondary inclined plate. The lower screening rack has an upper seed outlet located below the primary small impurity filter plate. The lower screening rack has a lower seed outlet located between the lower inclined plate and the secondary small impurity filter plate. The lower screening rack has a main seed outlet connected to the lower seed outlet and the upper seed outlet.

[0008] Preferably, a middle inclined plate is fixedly installed on the inner side of the screening base frame, which is placed between the lower screening frame and the upper screening frame.

[0009] Preferably, the same feeding frame is fixedly installed on both the screening base frame and one side of the upper processing frame. The feeding frame has a feeding port, and a feeding shaft is rotatably connected inside the feeding frame. A feeding roller is fixedly installed on the surface of the feeding shaft.

[0010] Preferably, the upper processing frame has multiple inner cavities, one of which is connected to the feeding frame. Each inner cavity is rotatably connected to a pusher shaft, and a pusher auger is fixedly installed on the surface of the pusher shaft. A support shaft is rotatably connected between two adjacent inner cavities. An air vent rocker is fixedly installed at one end of the support shaft, and an adjustment frame is fixedly installed on the surface of the support shaft. The upper processing frame has multiple light and impurity outlets that communicate with the inner cavities on one side.

[0011] Preferably, the surface of the upper processing rack is provided with an observation window, and the upper processing rack is provided with an air pump connection port.

[0012] Preferably, a drive motor is provided on one side of the screening base frame, and a rotating wheel is fixedly installed on both the output end of the drive motor and the surface of the drive shaft. The two rotating wheels are connected by a track. A small sprocket is fixedly installed on one end of the drive shaft, and a large sprocket is fixedly installed on one end of the feeding shaft. The small sprocket and the large sprocket are meshed with the same chain.

[0013] This utility model has the following beneficial technical effects.

[0014] 1. This utility model uses a two-stage screening process involving a primary large impurity filter plate and a secondary large impurity filter plate to separate large impurities. This is combined with a primary large impurity rack, a secondary large impurity rack, and a main large impurity rack for centralized impurity removal, avoiding interference with subsequent screening and improving efficiency. The primary and secondary small impurity filter plates separate small impurities from large seeds. Large seeds are collected at the main seed outlet via the upper and lower seed outlets, while small impurities are discharged through the primary, secondary, and main small impurity racks, ensuring precise separation. 2. This utility model uses an air pump to form a negative pressure to suck up light impurities through an air pump connection port. Rotating the air outlet rocker arm drives the adjustment frame to adjust the opening, adapting to different seeds and improving applicability. The pushing auger (rotates with the pushing shaft) pushes the impurities to the light impurity outlet to prevent secondary pollution and ensure seed purity. 3. This utility model controls the drive motor to drive the drive shaft via the rotating wheel and track, which synchronously drives the upper and lower screening frames to shake (by means of the eccentric wheel, connecting frame, and mounting frame) and the feeding roller to rotate (by means of the small sprocket, chain, and large sprocket). This saves power, reduces costs, and links the screening and feeding / dispersing drives in a synchronized manner, preventing multiple filter plates from clogging, improving process continuity, and meeting the requirements for batch continuous screening. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the assembly structure of the first-stage small impurity filter plate, the next-stage inclined plate, and the second-stage small impurity filter plate in this utility model.

[0017] Figure 3 This is a schematic diagram of the assembly structure of the pusher shaft, pusher auger and support shaft in this utility model.

[0018] Figure 4 This is a schematic diagram of the assembly structure of the upper-level inclined plate, the secondary large impurity filter plate, and the upper secondary inclined plate in this utility model.

[0019] Figure 5This is a schematic diagram of the assembly structure of the primary large miscellaneous material rack, the secondary large miscellaneous material rack, and the material pushing auger in this utility model.

[0020] Figure 6 This is a schematic diagram of the assembly structure of the upper seed outlet, the first-level small miscellaneous material rack, and the second-level small miscellaneous material rack in this utility model.

[0021] Figure 7 This is a schematic diagram of the assembly structure of the primary large miscellaneous material rack, the secondary large miscellaneous material rack, and the main large miscellaneous material rack in this utility model.

[0022] Figure 8 This is a schematic diagram of the assembly structure of the small sprocket, large sprocket, and chain in this utility model.

[0023] Figure 9 This is a schematic diagram of the assembly structure of the chain, drive shaft and eccentric wheel in this utility model.

[0024] Figure label: 1. Screening base frame; 2. Upper processing frame; 3. Mounting frame; 4. Feed inlet; 5. Air pump connection port; 6. Feed rack; 7. Observation window; 8. Drive motor; 9. Rotary wheel; 10. Air outlet rocker arm; 13. Lower screening frame; 14. Upper screening frame; 15. Light impurity outlet; 17. Track; 18. Feed shaft; 19. Feed roller; 20. Primary large impurity filter plate; 21. Upper primary inclined plate; 22. Secondary large impurity filter plate; 23. Upper secondary inclined plate; 24. Middle inclined plate; 25. Primary small impurity filter plate; 26. Lower primary inclined plate; 27. Secondary small impurity filter plate; 28. 29. Lower tertiary inclined plate; 30. Pushing shaft; 31. Pushing auger; 32. Support shaft; 33. Adjusting frame; 34. Distributing port; 35. Primary large miscellaneous material rack; 36. Secondary large miscellaneous material rack; 37. Main large miscellaneous material rack; 38. Main seed outlet; 39. Lower seed outlet; 40. Upper seed outlet; 41. Primary small miscellaneous material rack; 42. Secondary small miscellaneous material rack; 43. Main small miscellaneous material rack; 44. Small sprocket; 45. Large sprocket; 46. Chain; 47. Drive shaft; 48. Eccentric wheel; 49. Connecting frame; 50. Upper transmission frame. Detailed Implementation

[0025] The foregoing and other technical contents, features and effects of this utility model are described in conjunction with the appendix below. Figures 1 to 9 The detailed description of the embodiments will make this clear. All references to the following embodiments are made with reference to the accompanying drawings.

[0026] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] This utility model relates to a wind-powered reciprocating seed screening device, comprising a screening base frame 1, an upper processing frame 2 fixedly installed on the screening base frame 1, and an upper screening frame 14 and a lower screening frame 13 slidably connected within the screening base frame 1. The inner side of the upper screening frame 14 is sequentially fixedly installed from top to bottom with a primary large impurity filter plate 20, an upper primary inclined plate 21, a secondary large impurity filter plate 22, and an upper secondary inclined plate 23. All three plates are inclined at the same angle and are used to separate large impurities from the material. The inner side of the lower screening frame 13 is sequentially fixedly installed from top to bottom with a primary small impurity filter plate 25, a lower... The primary inclined plate 26, the secondary small impurity filter plate 27, the lower secondary inclined plate 28, and the lower tertiary inclined plate 29, as well as the primary small impurity filter plate 25, the lower primary inclined plate 26, the secondary small impurity filter plate 27, the lower secondary inclined plate 28, and the lower tertiary inclined plate 29, are all inclined at the same angle. The primary small impurity filter plate 25, the lower primary inclined plate 26, the secondary small impurity filter plate 27, the lower secondary inclined plate 28, and the lower tertiary inclined plate 29 are used to separate small impurities and small particles of seeds from the material. Two feed inlets 34 are fixedly installed on the inner sides of the upper screening frame 14 and the lower screening frame 13, respectively positioned above the primary large impurity filter plate 20 and the primary small impurity filter plate 25. A drive shaft 47 is rotatably connected to the inner side of the screening base frame 1. Multiple sets of eccentric wheels 48 are fixedly installed on the surface of the drive shaft 47, and hinged to the eccentric wheels 48. Connecting frame 49, one end of which is hinged to mounting frame 3 fixedly installed on lower screening frame 13 and upper screening frame 14. Inside upper screening frame 14, from top to bottom, are fixedly installed a primary large impurity rack 35, a secondary large impurity rack 36, and a main large impurity rack 37. The primary large impurity rack 35 is positioned below the primary large impurity filter plate 20 and is used for primary collection of large impurities. The secondary large impurity rack 36 is positioned below the secondary large impurity filter plate 22 and is used for secondary collection of large impurities. Inside lower screening frame 13, an upper conveyor frame 50 is installed below the upper inclined plate 21 and is used for conveying materials without large impurities. The main large impurity rack 37 has openings at both ends with the primary large impurity rack 35 and the secondary large impurity rack 36. The main large impurity rack 37 is used for centralized processing of impurities after two large impurity screenings. The lower screening rack 13 has a primary small impurity rack 41, a secondary small impurity rack 42, and a main small impurity rack 43 fixedly installed from top to bottom. The primary small impurity rack 41 is positioned below the next-level inclined plate 26. The primary and secondary small impurity racks 41 and 42 are used for collecting small impurities and small seeds. The secondary small impurity rack 42 is positioned below the next-level inclined plate 28. The lower screening rack 13 has an upper seed outlet 40 located below the primary small impurity filter plate 25. A lower seed outlet 39 is located between the next-level inclined plate 26 and the secondary small impurity filter plate 27 within the lower screening rack 13. The upper seed outlet 40, lower seed outlet 39, and main seed outlet 38 are used for centralized collection of qualified seeds.The lower screening rack 13 has a main seed outlet 38 that communicates with the lower seed outlet 39 and the upper seed outlet 40. A central inclined plate 24, positioned between the lower screening rack 13 and the upper screening rack 14, is fixedly installed inside the screening base frame 1.

[0028] In this embodiment, when it is necessary to screen the seeds, the seeds can be placed in the upper screening rack 14, and then the drive shaft 47 is controlled to drive the eccentric wheel 48 to rotate eccentrically, thereby pushing the connecting frame 49, the mounting frame 3, the upper screening rack 14 and the lower screening rack 13 to shake repeatedly. When the upper screening rack 14 and the lower screening rack 13 shake, they can cause the primary large impurity filter plate 20, the upper primary inclined plate 21, the secondary large impurity filter plate 22 and the upper secondary inclined plate 23 to shake, thereby causing the seeds falling into the upper screening rack 14 to roll. The primary large impurity filter plate 20 and the secondary large impurity filter plate 22 screen large impurities, and the upper primary inclined plate 21 and the upper secondary inclined plate 23 transfer the screened material. First, the large impurities screened on the primary large impurity filter plate 20 will fall into the primary large impurity material rack 35, and the impurities on the secondary large impurity filter plate 22 will fall into the secondary large impurity material rack 36. Finally, the main large impurity material rack 37 will discharge them. The material on the upper primary inclined plate 21 will be directly transferred to the next process through the upper transfer rack 50 and the material on the upper secondary inclined plate 23. When materials with excessively large impurities fall into the lower screening rack 13, the primary small impurity filter plate 25 and the secondary small impurity filter plate 27 screen the small seeds and small impurities. The next-level inclined plate 26, the next-level inclined plate 28, and the next-level inclined plate 29 transport the small seeds and small impurities. The large seeds on the primary small impurity filter plate 25 will fall into the main seed outlet 38 through the upper seed outlet 40, and the large seeds on the secondary small impurity filter plate 27 will fall into the main seed outlet 38 through the lower seed outlet 39. The large seeds are collected centrally through the main seed outlet 38, while the small seeds and small impurities are collected into the main small impurity rack 43 through the primary small impurity rack 41 and the secondary small impurity rack 42 and discharged centrally from the main small impurity rack 43.

[0029] As one embodiment, the same feeding frame 6 is fixedly installed on both the screening base frame 1 and one side of the upper processing frame 2. The feeding frame 6 has a feeding port 4, and an adjustable outlet size structure is provided below the feeding frame 6. The feeding port 4 is a funnel-shaped metal frame. A feeding shaft 18 is rotatably connected inside the feeding frame 6. A feeding roller 19 is fixedly installed on the surface of the feeding shaft 18. The surface of the feeding roller 19 has multiple teeth. The upper processing frame 2 has multiple inner cavities, one of which communicates with the feeding frame 6. A pusher shaft 30 is rotatably connected to the inner side of the cavity. A pusher motor is installed on one end of the pusher shaft 30. A pusher auger 31 is fixedly installed on the surface of the pusher shaft 30. A support shaft 32 is rotatably connected between two adjacent inner cavities. An air vent rocker arm 10 is fixedly installed on one end of the support shaft 32. An adjustment frame 33 is fixedly installed on the surface of the support shaft 32. Multiple light and impurity outlets 15 communicating with the inner cavity are provided on one side of the upper processing frame 2. An observation window 7 is opened on the surface of the upper processing frame 2. An air pump connection port 5 is provided on the upper processing frame 2.

[0030] In this embodiment, when it is necessary to add material, the material is added from the feed inlet 4, and then the feed shaft 18 can be controlled to rotate, driving the feed roller 19 to follow the rotation, thus breaking up and separating the material. Connect the air pump port 5 to an external air pump in advance. Then, by operating the air pump, the air inside the inner cavity is extracted. At this time, the inner cavity is under negative pressure, which can draw the light impurity feed rack 6 into the inner cavity. During the extraction process, the size of the opening connecting the inner cavities can be adjusted by rotating the air vent rocker 10 to drive the support shaft 32 and the adjustment frame 33 to rotate. Finally, the pusher motor can be controlled by the controller to drive the pusher shaft 30 and the pusher auger 31 to rotate, pushing the light impurities collected in the inner cavity into the light impurity outlet 15 for collection.

[0031] As an example, a drive motor 8 is provided on one side of the screening base frame 1. The drive motor 8 is connected to an external power supply and controller. A rotating wheel 9 is fixedly installed on both the output end of the drive motor 8 and the surface of the drive shaft 47. A track 17 is connected to the surface of the two rotating wheels 9. A small sprocket 44 is fixedly installed on one end of the drive shaft 47, and a large sprocket 45 is fixedly installed on one end of the feeding shaft 18. The small sprocket 44 and the large sprocket 45 are meshed with the same chain 46.

[0032] In this embodiment, when the drive motor 8 is working, it can drive the rotating wheel 9 to rotate, which in turn drives the drive shaft 47 to rotate with the track 17, thereby driving the lower screening frame 13 and the upper screening frame 14 to sway. At the same time, the rotation of the drive shaft 47 can drive the connecting frame 49 and the large sprocket 45 to rotate, thereby driving the feeding shaft 18 and the feeding roller 19 to rotate, thereby driving the feeding operation.

[0033] Working principle: S1. The controller controls the drive motor 8 to work, driving the rotating wheel 9 to rotate. The drive shaft 47 is driven to rotate through the track 17. At the same time, the small sprocket 44 on the drive shaft 47 drives the large sprocket 45 to rotate through the chain 46, which in turn drives the feeding shaft 18 to rotate, realizing the synchronous operation of screening shaking and feeding drive. The seeds to be screened are added from the feeding port 4 of the feeding rack 6. The rotating feeding shaft 18 drives the feeding roller 19 (multi-toothed surface) to rotate, breaking up and separating the seeds. At the same time, the air pump connection port 5 is connected to an external air pump, so that the inner cavity of the upper processing rack 2 forms a negative pressure, and the light impurities are drawn into the inner cavity from the connection between the feeding rack 6 and the inner cavity. During the process, the air outlet rocker arm 10 can be rotated, and the size of the inner cavity connection port can be adjusted by the adjustment frame 33 through the support shaft 32. Then the controller controls the pusher motor to work, driving the pusher shaft 30 and the pusher auger 31 to rotate, pushing the light impurities in the inner cavity to the light impurity outlet 15 for collection. The condition of the inner cavity can be observed through the observation window 7. S2. The pre-treated seeds enter the upper screening rack 14. The drive shaft 47 drives the eccentric wheel 48 to rotate eccentrically, pushing the connecting frame 49 and the mounting frame 3, causing the upper screening rack 14 and the lower screening rack 13 to shake repeatedly. The shaking causes the primary impurity filter plate 20, the upper primary inclined plate 21, the secondary impurity filter plate 22, and the upper secondary inclined plate 23 in the upper screening rack 14 to shake. The seeds roll on the inclined filter plates and inclined plates. The impurities screened by the primary impurity filter plate 20 fall into the primary impurity material rack 35, and the impurities screened by the secondary impurity filter plate 22 fall into the secondary impurity material rack 36. Finally, they are discharged through the main impurity material rack 37. The material without impurities after screening is transferred through the upper primary inclined plate 21, the upper transmission frame 50, and the upper secondary inclined plate 23, and then passes through the middle inclined plate 24 into the lower screening rack 13. S3. The material entering the lower screening rack 13 is driven to roll on the first-stage small impurity filter plate 25, the next-stage inclined plate 26, the second-stage small impurity filter plate 27, the next-stage inclined plate 28, and the next-stage inclined plate 29 as the lower screening rack 13 and the upper screening rack 14 shake. The large seeds after being screened by the first-stage small impurity filter plate 25 fall from the upper seed outlet 40 into the main seed outlet 38, and the large seeds after being screened by the second-stage small impurity filter plate 27 fall from the lower seed outlet 39 into the main seed outlet 38 and are then discharged in a concentrated manner. S4. Small miscellaneous and small-particle seeds fall into the first-level small miscellaneous material rack 41 and the second-level small miscellaneous material rack 42 respectively through the next-level inclined plate 26 and the next-level inclined plate 28, and are finally discharged into the main small miscellaneous material rack 43, completing the entire seed screening process.

[0034] This utility model has the following beneficial technical effects.

[0035] 1. This utility model uses a two-stage screening process, consisting of a primary large impurity filter plate 20 and a secondary large impurity filter plate 22, to separate large impurities. This is combined with a primary large impurity rack 35, a secondary large impurity rack 36, and a main large impurity rack 37 for centralized impurity discharge, avoiding interference with subsequent screening and improving efficiency. The primary small impurity filter plate 25 and the secondary small impurity filter plate 27 separate small impurities from large seeds. Large seeds are collected at the main seed outlet 38 via the upper seed outlet 40 and the lower seed outlet 39. Small impurities are discharged through the primary small impurity rack 41, the secondary small impurity rack 42, and the main small impurity rack 43, ensuring precise separation. 2. This utility model uses an air pump connected to the air pump connection port 5 to form a negative pressure to suck up light impurities. Rotating the air outlet rocker arm 10 drives the adjustment frame 33 to adjust the opening, adapting to different seeds and improving applicability. The pushing auger 31 (rotates with the pushing shaft 30) pushes the impurities to the light impurity outlet 15 to prevent secondary pollution and ensure seed purity. 3. This utility model controls the drive motor 8 to drive the drive shaft 47 via the rotating wheel 9 and the track 17, which synchronously drives the upper screening frame 14 and the lower screening frame 13 to shake (via the eccentric wheel 48, connecting frame 49, and mounting frame 3) and the feeding roller 19 to rotate (via the small sprocket 44, chain 46, and large sprocket 45). This saves power, reduces costs, and links the screening and feeding / dispersing processes together with synchronized rhythm. This prevents multiple filter plates from clogging, improves process continuity, and meets the requirements for batch continuous screening.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A wind-powered reciprocating seed screening device, comprising a screening base frame (1), an upper processing frame (2) fixedly installed on the screening base frame (1), and an upper screening frame (14) and a lower screening frame (13) slidably connected within the screening base frame (1), characterized in that, The upper screening rack (14) is fixedly installed with a primary large impurity filter plate (20), an upper primary inclined plate (21), a secondary large impurity filter plate (22), and an upper secondary inclined plate (23) from top to bottom on its inner side. The lower screening rack (13) is fixedly installed with a primary small impurity filter plate (25), a lower primary inclined plate (26), a secondary small impurity filter plate (27), a lower secondary inclined plate (28), and a lower tertiary inclined plate (29) from top to bottom on its inner side. The inner sides of the upper screening rack (14) and the lower screening rack (13) are also fixedly installed with these components. Two feed inlets (34) are fixedly installed on the screen base (1), one above the first-stage large impurity filter plate (20) and the other above the first-stage small impurity filter plate (25). A drive shaft (47) is rotatably connected to the inner side of the screen base (1). Multiple sets of eccentric wheels (48) are fixedly installed on the surface of the drive shaft (47). A connecting frame (49) is hinged on the eccentric wheel (48). One end of the connecting frame (49) is hinged to a mounting frame (3) fixedly installed on the lower screen frame (13) and the upper screen frame (14).

2. The wind-powered reciprocating seed screening device according to claim 1, characterized in that, The upper screening rack (14) is fixedly installed with a primary large waste rack (35), a secondary large waste rack (36), and a main large waste rack (37) in sequence from top to bottom. The primary large waste rack (35) is located below the primary large waste filter plate (20), and the secondary large waste rack (36) is located below the secondary large waste filter plate (22). The lower screening rack (13) is provided with an upper transmission rack (50) located below the upper inclined plate (21). The main large waste rack (37) is connected to the primary large waste rack (35) and the secondary large waste rack (36) through openings at both ends. The lower screening rack (13) is fixedly installed with a primary small waste rack in sequence from top to bottom. The equipment includes a miscellaneous material rack (41), a secondary small miscellaneous material rack (42), and a main small miscellaneous material rack (43). The primary small miscellaneous material rack (41) is located below the next-level inclined plate (26), and the secondary small miscellaneous material rack (42) is located below the next-level inclined plate (28). The lower screening rack (13) has an upper seed outlet (40) located below the primary small miscellaneous filter plate (25). The lower screening rack (13) has a lower seed outlet (39) located between the next-level inclined plate (26) and the secondary small miscellaneous filter plate (27). The lower screening rack (13) has a main seed outlet (38) connected to the lower seed outlet (39) and the upper seed outlet (40).

3. The wind-powered reciprocating seed screening device according to claim 2, characterized in that, The screening base (1) has a middle inclined plate (24) fixedly installed on its inner side between the lower screening frame (13) and the upper screening frame (14).

4. The wind-powered reciprocating seed screening device according to claim 1, characterized in that, The same feeding rack (6) is fixedly installed on the screening base frame (1) and one side of the upper processing rack (2). The feeding rack (6) has a feeding port (4). The feeding rack (6) is rotatably connected to the feeding shaft (18). The feeding shaft (18) has a feeding roller (19) fixedly installed on its surface.

5. The wind-powered reciprocating seed screening device according to claim 4, characterized in that, The upper processing rack (2) has multiple inner cavities, one of which is connected to the feeding rack (6). Each inner cavity is rotatably connected to a pusher shaft (30). A pusher auger (31) is fixedly installed on the surface of the pusher shaft (30). A support shaft (32) is rotatably connected between two adjacent inner cavities. A vent rocker arm (10) is fixedly installed at one end of the support shaft (32). An adjustment frame (33) is fixedly installed on the surface of the support shaft (32). The upper processing rack (2) has multiple light and dirty outlets (15) connected to the inner cavities on one side.

6. The wind-powered reciprocating seed screening device according to claim 5, characterized in that, The upper processing rack (2) has an observation window (7) on its surface and an air pump connection port (5) on its surface.

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