A seed sorting device for use in a crop sowing operation

Abstract

The application discloses a kind of seed selection sorting devices before crop seeding operation, which belongs to the technical field of seed sorting.It mainly includes fixed frame, fixedly installed with slide rail and rack on the rear part side wall of fixed frame, and adjusting mechanism is slidably connected on the slide rail, and the upper part of fixed frame is provided with screening mechanism, and double specific gravity sieve is provided below screening mechanism, and connecting rod assembly is further provided on fixed frame.The application is high-precision sorted for light quality, small density, large size difference and different density impurities in seeds, including half full particle, worm-eaten particle, diseased particle, weed seed, by collecting double-channel elevator, air separation mechanism, screening mechanism and double specific gravity sieve.The whole equipment structure is compact, and the floor area is small.The application is mainly used for sorting and selecting operation of seeds.

Description

Technical Field

[0001] This invention belongs to the field of seed sorting technology, and more specifically, it relates to a seed selection and sorting device before crop sowing. Background Technology

[0002] During harvesting, storage, and transportation, crop seeds inevitably become mixed with impurities such as soil clods, straw, chaff, broken grains, and insect-damaged grains. Therefore, before sowing, seeds must be pre-treated using a seed selection and sorting device to remove impurities and inferior seeds, retaining plump, healthy, and uniform high-quality seeds. This improves germination rate, ensures uniform emergence, enhances sowing quality, and increases crop yield.

[0003] Chinese patent publication number CN121314906A discloses a crop seed selection system, including a screening device detachably connected to a wind-screening machine. The screening device is used to separate seeds from seed coats and dust. The screening device includes an elevator, a wind-separating mechanism, and a cyclone separator. The elevator is located near the wind-screening machine. Grains are screened in the wind-separating mechanism and then enter the elevator. The wind-separating mechanism is used to separate seed coats and dust from the grains. The cyclone separator is connected to the wind-separating mechanism and is used to separate and collect seed coats and dust in the wind-separating mechanism. An airtight device is detachably connected to the discharge port of the elevator and is used to control the air inlet on the elevator, thereby adjusting the air intake direction of the wind-separating mechanism. This solves the technical problem of significant air pollution during the crop seed selection process in the prior art.

[0004] During later use, the device still has the following problems: 1. The device is too large and occupies a large area, making it only suitable for large factories such as seed companies, with a small scope of application; 2. When sorting different types of seeds, it is difficult to adjust the tilt angle of the relevant equipment, which affects the sorting effect. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a seed selection and sorting device before crop sowing. The device combines a dual-channel elevator, an air separation mechanism, a sieving mechanism and a double gravity sieve to perform high-precision sorting of impurities in seeds that are lighter in weight and lower in density, impurities with large size differences and impurities that are difficult to separate due to different densities, including half-full seeds with poor plumpness, insect-damaged seeds, diseased seeds and weed seeds. The entire device has a compact structure and occupies a small area.

[0006] The aforementioned seed selection and sorting device before crop sowing includes a fixed frame, a slide rail and a rack fixedly installed on the rear side wall of the fixed frame, an adjustment mechanism slidably connected to the slide rail, a screening mechanism on the upper part of the fixed frame, a double gravity screen below the screening mechanism, and a connecting rod assembly on the fixed frame. The connecting rod assembly includes a connecting rod one and a connecting rod two. Connecting rod one is rotatably connected to the top of the fixed frame, and the other end of connecting rod one is rotatably connected to the front of the screening mechanism. A linkage connecting rod is rotatably connected to the rear of the screening mechanism, and the other end of the linkage connecting rod is rotatably connected to a transmission connecting rod. The middle part of the linkage connecting rod is rotatably connected to the top of the adjustment mechanism, and the lower part of the transmission connecting rod is rotatably connected to the front of the double gravity screen. One end of connecting rod two is rotatably connected to the bottom of the adjustment mechanism, and the other end of connecting rod two is coaxially rotatably connected to the front of the double gravity screen with the transmission connecting rod. A connecting rod three is rotatably connected to the rear of the double gravity screen, and the other end of connecting rod three is rotatably connected to the middle of the fixed frame.

[0007] Preferably, a dual-channel elevator is fixedly installed on the left side wall of the fixed frame, a hopper is fixedly connected to the outer side of the bottom front end of the dual-channel elevator, a feed inlet is fixedly provided on the inner side of the bottom rear end of the dual-channel elevator, a double-bucket lifting mechanism is installed inside the dual-channel elevator, a drive motor is fixedly connected to the outer wall of the bottom of the dual-channel elevator, an outer discharge port is fixedly provided at the upper front end of the dual-channel elevator, and an inner discharge port is fixedly provided at the upper rear end of the dual-channel elevator.

[0008] Preferably, a suction fan is fixedly installed on the right side wall of the fixed frame, and a drive mechanism is fixedly installed at the bottom of the fixed frame. The drive mechanism includes a power component, a pulley, and a second pulley. The first pulley is fixedly connected to the rotating shaft of the suction fan. The first pulley is connected to the power component through a transmission belt. The second pulley is fixedly connected to a fan impeller. The fan impeller is rotatably connected to the fixed frame. The second pulley is connected to the power component through a transmission belt.

[0009] Preferably, an air classifier is fixedly installed at the front of the fixed frame. The top of the air classifier is connected to the outer discharge port through a connecting hose. Multiple sets of material distribution plates are fixedly connected to the upper part of the air classifier. Multiple sets of discharge inclined plates are fixedly connected to the lower part of the air classifier. The upper side wall of the air classifier is connected to the air inlet port of the suction fan. An air inlet baffle is fixedly installed on the lower outer wall of the air classifier. The bottom of the air classifier is connected to the feed inlet.

[0010] Preferably, the top of the screening mechanism is fixedly provided with a second feed inlet, which is connected to the inner feed port through a second connecting hose. A coarse screen is slidably installed at the upper part of the screening mechanism, and a fine screen is slidably installed at the lower part of the screening mechanism. A pressure plate is bolted to the outer wall of the front part of the screening mechanism. The rear part of the screening mechanism is fixedly provided with a coarse impurity outlet, a first discharge outlet, and a fine impurity outlet from top to bottom.

[0011] Preferably, the double-gravity screen has a waste material outlet fixedly provided on the front outer wall, a fixed connecting block fixedly connected to the rear outer wall, a feed inlet three fixedly provided on the top of the double-gravity screen, the feed inlet three being connected to the discharge outlet one through a connecting hose three, an adjusting groove fixedly provided on the side wall of the double-gravity screen, a partition fixedly connected inside the double-gravity screen, the partition dividing the interior of the double-gravity screen into a bottom blowing chamber and a top sorting chamber, a coarse screen mounting frame being bolted above the sorting chamber, a fine screen mounting frame being installed below the sorting chamber, the rear end of the fine screen mounting frame being bolted to the double-gravity screen, the front end of the fine screen mounting frame being bolted to the adjusting groove, and a guide plate fixedly installed between the coarse screen mounting frame and the fine screen mounting frame.

[0012] Preferably, multiple sets of air vents are fixedly provided on the partition plate, multiple sets of air vents are fixedly provided on the front side wall of the coarse screen mounting frame, each air vent is fixedly connected to an external air duct, the other end of the external air duct is connected to the air blowing chamber, multiple sets of air vents are fixedly provided on the bottom outer wall of the fine screen mounting frame, the air vents are connected to the air vents via connecting hoses, and air screen plates are bolted to the top of both the coarse screen mounting frame and the fine screen mounting frame.

[0013] Preferably, a second drive mechanism is also fixedly provided at the bottom of the fixed frame. The second drive mechanism includes a second power component and a pull rod. The pull rod is rotatably connected to the second power component, and the other end of the pull rod is rotatably connected to the fixed connecting block. A compression spring assembly is also fixedly connected at the bottom of the fixed frame. The other end of the compression spring assembly is fixedly connected to the bottom of the double specific gravity screen. A discharge plate is also fixedly connected at the rear end of the bottom of the fixed frame. Multiple sets of baffles are bolted to the outside of the fixed frame.

[0014] Preferably, the adjusting mechanism includes a mounting slide, a rotating rod, and a rotating wheel. The mounting slide is slidably connected to a slide rail. Lifting components are rotatably connected to both sides of the mounting slide. A locking component is slidably connected to the upper part of the mounting slide. The rotating rod is rotatably connected to the mounting slide. A drive screw is provided on the outer wall of the inner end of the rotating rod. A driven screw is threadedly connected to the outer wall of the drive screw. The driven screw is connected to the locking component by bolts. The rotating wheel is rotatably connected to the middle of the mounting slide. A drive shaft is fixedly connected to the center of the rotating wheel. A transmission wheel cylinder is circumferentially fixed to the drive shaft. A compression spring is slidably contacted on the side wall of the transmission wheel cylinder. The other end of the compression spring is fixedly connected to the mounting slide.

[0015] Preferably, the lifting assembly includes a gear, a worm gear, and a worm shaft. The worm shaft is fixedly connected to the outer end of the rotating rod, the worm gear is circumferentially fixed to the gear, and both the worm gear and the gear are rotatably connected to the mounting slide. The gear meshes with a rack, the worm gear meshes with the worm shaft, a locking tooth is fixedly connected to the inner end of the rotating rod, a locking tooth is fixedly connected to the inner end of the drive screw, a tooth groove is fixedly opened on the outer wall of one end of the transmission wheel cylinder, the tooth groove is circumferentially fixed to the drive shaft, an external gear set is fixedly connected to the outer wall of the other end of the transmission wheel cylinder, the external gear set cooperates with the locking tooth two, and an internal gear set is fixedly connected to the inner side wall of the transmission wheel cylinder, the internal gear set cooperates with the locking tooth one.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. By combining a dual-channel elevator, air separation mechanism, screening mechanism and double gravity screen, it can perform high-precision sorting of impurities in seeds that are lighter in weight and lower in density, impurities with large size differences and impurities that are difficult to separate with different densities, including half-full grains with poor plumpness, insect-damaged grains, diseased grains and weed seeds. The whole equipment has a compact structure and occupies a small area. 2. By setting an adjustment mechanism, rotating the rotating wheel drives the locking component to extend to both sides to lock the rack, fixing the current position of the adjustment mechanism. While pressing the transmission wheel cylinder inward, the rotating wheel rotates, and the worm drives the turbine to drive the gear to move on the rack, thereby changing the current position of the adjustment mechanism, thereby adjusting the inclination angle of the screening mechanism and the double gravity screen to adapt to the sorting operation of seeds of different sizes. 3. By setting up a double gravity sieve, the seeds are first coarsely sorted and then finely sorted, which greatly improves the rate of good seeds. The inclination difference between the fine sieve installation frame and the coarse sieve installation frame can be adjusted separately to increase the sieving effect on the seeds. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the appearance of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the front structure of the present invention; Figure 4 This is a structural schematic diagram of the fixed frame and drive mechanism 1; Figure 5 This is a schematic diagram of the internal structure of a dual-channel hoist. Figure 6 This is a schematic diagram of the upper view of the dual-channel hoist. Figure 7 This is a schematic diagram of the internal structure of the air separation mechanism; Figure 8 This is a schematic diagram of the overall structure of the screening mechanism; Figure 9 This is a schematic diagram of the rear structure of the screening mechanism; Figure 10 This is a schematic diagram of the internal structure of the screening mechanism; Figure 11 This is a schematic diagram of the overall structure of a dual gravity screen; Figure 12 This is a schematic diagram of the air blowing chamber and sorting chamber inside the dual gravity screen; Figure 13 This is a schematic diagram of the internal structure of a dual gravity screen; Figure 14 This is a structural diagram of the air screen plate and mounting frame; Figure 15 This is a schematic diagram of the linkage assembly installation. Figure 16 This is a schematic diagram of the overall adjustment mechanism; Figure 17 This is a schematic diagram showing the assembly of the lifting components; Figure 18 This is an exploded view of the regulating mechanism. Figure 19 This is a schematic diagram of the structure when the rotating wheel and locking assembly are engaged. Figure 20 This is a structural diagram showing the wheel and lifting assembly in operation. Figure 21 This is a schematic diagram of part of the internal structure of the adjustment mechanism.

[0018] In the diagram, 1. Fixed frame; 101. Baffle; 102. Discharge plate; 103. Slide rail; 104. Rack; 105. Compression spring assembly; 2. Double-channel elevator; 201. Hopper; 202. Double-bucket elevator mechanism; 203. Drive motor one; 204. Outer discharge port; 205. Inner discharge port; 206. Inlet one; 3. Air separation mechanism; 301. Distributor plate; 302. Discharge ramp; 303. Air inlet baffle; 4. Fan; 5. Screening mechanism; 5 01. Feed Inlet Two; 502. Coarse Screen; 503. Fine Screen; 504. Pressure Plate; 505. Coarse Impurity Outlet; 506. Discharge Outlet One; 507. Fine Impurity Outlet; 6. Double Gravity Screen; 601. Fixed Connecting Block; 602. Adjusting Slide; 603. Feed Inlet Three; 604. Impurity Outlet; 605. Guide Plate; 606. External Air Duct; 607. Coarse Screen Mounting Frame; 607A. Air Outlet One; 608. Fine Screen Mounting Frame; 608A. Air Outlet Two; 60 9. Partition plate; 609A. Air vent three; 610. Air screen plate; 7. Linkage assembly; 701. Linkage rod one; 702. Linkage rod; 703. Transmission link; 704. Linkage rod two; 705. Linkage rod three; 8. Adjustment mechanism; 801. Mounting slide; 802. Lifting assembly; 802A. Gear; 802B. Turbine; 802C. Worm gear; 803. Locking assembly; 804. Rotary wheel; 804A. Drive shaft; 805. Transmission wheel cylinder; 805A. Gear groove; 805B, internal gear assembly; 805C, external gear assembly; 806, rotating rod; 806A, locking tooth one; 807, driven solenoid; 808, driving solenoid; 808A, locking tooth two; 809, compression spring; 9, drive mechanism one; 901, power assembly one; 902, transmission belt one; 903, transmission belt two; 904, pulley one; 905, pulley two; 906, fan impeller; 10, drive mechanism two; 1001, power assembly two; 1002, pull rod. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings: The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise explicitly specified and limited, the terms "setting," "installing," "connecting," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0020] like Figure 1 , Figure 2 and Figure 3As shown, a seed selection and sorting device before crop sowing includes a fixed frame 1. A slide rail 103 and a rack 104 are fixedly installed on the rear side wall of the fixed frame 1. The slide rail 103 is fixedly installed on the front and rear side walls of the fixed frame 1. The rack 104 is fixedly installed on the inner side wall of the fixed frame 1. An adjustment mechanism 8 is slidably connected to the slide rail 103. By setting the adjustment mechanism 8, rotating the rotating wheel 804 drives the locking component 803 to extend to both sides and lock the rack 104, thus fixing the current position of the adjustment mechanism 8. While pressing the transmission wheel cylinder 805 inward, the rotating wheel 804 is rotated. The worm 802C drives the turbine 802B, which in turn drives the gear 802A to move on the rack 104, thereby changing the current position of the adjustment mechanism 8, thereby adjusting the inclination angle of the screening mechanism 5 and the double gravity screen 6 to adapt to the sorting operation of seeds of different sizes.

[0021] A screening mechanism 5 is installed on the upper part of the fixed frame 1, and a double gravity sieve 6 is installed below the screening mechanism 5. By setting the double gravity sieve 6, the seeds are first coarsely sorted and then finely sorted, which greatly improves the rate of good seeds. The inclination angle difference between the fine sieve mounting frame 608 and the coarse sieve mounting frame 607 can be adjusted separately to increase the screening effect on the seeds; Figure 15 As shown, the fixed frame 1 is also equipped with a connecting rod assembly 7. By setting the connecting rod assembly 7, the drive mechanism 2 10 can drive the double gravity screen 6 and the screening mechanism 5 to shake simultaneously, making the structure more compact and the volume smaller.

[0022] The connecting rod assembly 7 includes connecting rod one 701 and connecting rod two 704. Connecting rod one 701 is rotatably connected to the top of the fixed frame 1. The rotatable connection between the connecting rod and the fixed frame 1 is achieved through bearing swivels. Adjusting the installation position of the bearing swivels relative to the fixed frame 1 can adjust the posture of the screening mechanism 5 and the double gravity screen 6, but this adjustment is difficult and requires disassembling a large number of parts. Therefore, existing seed sorting equipment can adjust the vibration frequency of the vibrating screen, the seed feeding speed, or the air intake of the blower when dealing with seeds of different sizes, but it is generally unwilling to adjust the inclination angle of the screening mechanism 5 and the gravity screen, resulting in the inability to achieve the best seed screening effect. The other end of connecting rod one 701 is rotatably connected to the front of the screening mechanism 5. The rear of the screening mechanism 5 is rotatably connected to a linkage connecting rod 702. The linkage connecting rod 702, in conjunction with the transmission connecting rod 703, transmits the shaking of the double gravity screen 6 to the screening mechanism 5.

[0023] The other end of the linkage 702 is rotatably connected to the transmission linkage 703. The middle part of the linkage 702 is rotatably connected to the top of the adjustment mechanism 8. The lower part of the transmission linkage 703 is rotatably connected to the front of the double specific gravity screen 6. One end of the second linkage 704 is rotatably connected to the bottom of the adjustment mechanism 8. The other end of the second linkage 704 is coaxially rotatably connected to the front of the double specific gravity screen 6 with the transmission linkage 703. Fixed shafts are connected to the front and rear side walls of the screening mechanism 5 and the double specific gravity screen 6 to facilitate cooperation with the linkage assembly 7 and to connect the screening mechanism 5 and the double specific gravity screen 6 to the fixed frame 1. The rear of the double specific gravity screen 6 is rotatably connected to the third linkage 705. The other end of the third linkage 705 is rotatably connected to the middle of the fixed frame 1.

[0024] By combining a dual-channel elevator 2, an air separation mechanism 3, a screening mechanism 5, and a double gravity screen 6, the equipment can perform high-precision sorting of impurities in seeds that are lighter in weight and lower in density, impurities with large size differences, and impurities that are difficult to separate due to different densities, including half-full seeds with poor plumpness, insect-damaged seeds, diseased seeds, and weed seeds. The entire equipment has a compact structure and occupies a small area.

[0025] like Figure 5 and Figure 6 As shown, a double-channel elevator 2 is fixedly installed on the left side wall of the fixed frame 1. A hopper 201 is fixedly connected to the outer side of the bottom front end of the double-channel elevator 2. Seeds that need to be sorted are first put into the hopper 201 and are picked up and lifted to the top by the lifting bucket of the front part of the double-bucket elevator mechanism 202. They fall into the air separation mechanism 3 from the outer discharge port 204 for air separation. The lighter and less dense impurities mixed in with the seeds, including dust, straw, chaff, and light weed seeds, are separated from the qualified seeds by wind. The seeds are then preliminarily separated. The seeds re-enter the dual-channel elevator 2 from the bottom of the air separation mechanism 3 through the feed inlet 206. At this time, the seeds are grabbed by the lifting buckets of the rear half of the double bucket elevator mechanism 202 and lifted to the top. The feed inlet 206 is fixedly provided on the inner side of the bottom rear end of the dual-channel elevator 2. The double bucket elevator mechanism 202 is installed inside the dual-channel elevator 2. An isolation plate is fixedly installed inside the dual-channel elevator 2 to separate the front and rear spaces inside the dual-channel elevator 2, so as to avoid the seeds with air separation treatment and the seeds after air separation from mixing, which would affect the seed separation effect.

[0026] A drive motor 203 is fixedly connected to the bottom outer wall of the dual-channel elevator 2. The drive motor 203 drives the double-bucket elevator mechanism 202 to rotate within the dual-channel elevator 2, continuously lifting the seeds upwards. An external discharge port 204 is fixedly provided at the upper front end of the dual-channel elevator 2, which feeds the seeds into the air separation mechanism 3 for air separation. An internal discharge port 205 is fixedly provided at the upper rear end of the dual-channel elevator 2, which feeds the seeds into the screening mechanism 5 for screening.

[0027] like Figure 4 As shown, a suction fan 4 is fixedly installed on the right side wall of the mounting frame 1. The suction fan 4 is existing technology equipment and can be purchased directly. It is responsible for cooperating with the air separation mechanism 3 to perform air separation of seeds. A drive mechanism 9 is fixedly installed at the bottom of the mounting frame 1. The drive mechanism 9 includes a power component 901, a pulley 904, and a second pulley 905. The pulley 904 is fixedly connected to the shaft of the suction fan 4. The pulley 904 is connected to the power component 901 via a transmission belt 902. The second pulley 905 is fixedly connected to a fan impeller 906. The fan impeller 906 is rotatably connected to the mounting frame 1. The second pulley 905 is connected to the power component 901 via a transmission belt 903. The power component 901 is a drive motor that drives the two sets of pulleys to rotate. The two sets of pulleys then transmit power to the suction fan 4 and the fan impeller 906 via the transmission belts 902 and 903, respectively. The rated speed of the fan impeller 906 is lower than that of the suction fan 4. By matching the transmission ratios of pulleys with different diameters, the speed of the drive motor is adjusted to match the respective speeds of the suction fan 4 and the fan impeller 906.

[0028] like Figure 7 As shown, a wind classifier 3 is fixedly installed at the front of the fixed frame 1. The top of the wind classifier 3 is connected to the external discharge port 204 through a connecting hose. The connecting hose is an existing product and can be purchased directly as needed. It is connected to the corresponding pipe port using clamps. Multiple sets of material distribution plates 301 are fixedly connected to the upper part of the wind classifier 3, and multiple sets of material discharge inclined plates 302 are fixedly connected to the lower part of the wind classifier 3. The multiple sets of material discharge inclined plates 302 are installed sequentially from top to bottom inside the wind classifier 3, allowing the seeds to fall through multiple flips during the falling process. They slide down from the front end of the wind classifier 3 to the rear end, and then fall onto the next layer of material discharge inclined plates 302. This process is repeated multiple times, and the suction fan 4 sucks away the light impurities mixed in with the seeds. The upper side wall of the air classifier 3 is connected to the air inlet port of the suction fan 4, and an air inlet baffle 303 is fixedly installed on the lower outer wall of the air classifier 3. The bottom of the air classifier 3 is connected to the feed inlet 206. External air enters the interior of the air classifier 3 through the air inlet baffle 303 and blows upwards.

[0029] like Figure 8 , Figure 9 and Figure 10As shown, the top of the screening mechanism 5 is fixedly provided with a second feed inlet 501, which is connected to the inner feed outlet 205 through a second connecting hose. A coarse screen 502 is slidably installed at the upper part of the screening mechanism 5, and a fine screen 503 is slidably installed at the lower part of the screening mechanism 5. By setting the coarse screen 502 and the fine screen 503, soil clods, straw pieces, large weeds, and large impurities larger than seeds, as well as fine mud, sand, fragments, and small weed seeds smaller than seeds, are separated out. A pressure plate 504 is bolted to the outer wall of the front part of the screening mechanism 5. When it is necessary to replace the screen, the bolts are loosened and the pressure plate 504 is removed to pull out the screen for replacement. The new screen with a new mesh size is pushed inward into the screening mechanism 5, and the pressure plate 504 is pressed tight with bolts to complete the screen replacement operation.

[0030] The rear of the screening mechanism 5 is fixed with a coarse impurity outlet 505, a discharge port 506, and a fine impurity outlet 507, arranged from top to bottom. Large impurities larger than the seeds are discharged from the coarse impurity outlet 505, and small impurities smaller than the seeds are discharged from the fine impurity outlet 507. After screening, the seeds enter the double gravity screen 6 at the bottom through the discharge port 506 for further screening.

[0031] like Figure 11 and Figure 12 As shown, the front outer wall of the double gravity sieve 6 is fixedly provided with a waste outlet 604. Impurities that are similar in size to seeds but different in density and difficult to separate, including half-full seeds with poor plumpness, insect-damaged seeds, diseased seeds, and weed seeds, are sorted out and discharged from the waste outlet 604. A fixed connecting block 601 is fixedly connected to the rear outer wall of the double gravity sieve 6. The fixed connecting block 601 is connected to the drive mechanism 10, which pulls the entire double gravity sieve 6 to shake repeatedly. At the same time, the connecting rod assembly 7 drives the screening mechanism 5 to shake repeatedly.

[0032] The double gravity screen 6 has a fixed feed inlet 3 603 at its top, which is connected to the discharge outlet 1 506 via a connecting hose 3. An adjusting groove 602 is fixedly provided on the side wall of the double gravity screen 6. The adjusting groove 602 cooperates with the front of the fine screen mounting frame 608, allowing further adjustment of the inclination angle of the fine screen mounting frame 608. The upper coarse screen mainly achieves rapid material spreading and preliminary grading, while the lower fine screen is used for high-precision gravity separation. Depending on the seed size, the inclination angle of the upper coarse screen is greater than that of the lower fine screen, forming a reasonable inclination angle difference. The inclination angle difference is moderate for large seeds and appropriately increased for medium and small seeds, thus ensuring that different seeds can obtain suitable flow rates and separation times, improving the versatility and separation accuracy of the device.

[0033] The double gravity screen 6 is internally fixedly connected to a partition 609, which divides the interior of the double gravity screen 6 into a bottom blowing chamber and a top sorting chamber. The blower impeller 906 cooperates with the blowing chamber, and the rotation of the blower impeller 906 draws external air into the blowing chamber. The air from the blowing chamber is blown into the coarse screen mounting frame 607 and the fine screen mounting frame 608 respectively through the external air pipe 606 and the connecting hose. The coarse screen mounting frame 607 is bolted to the top of the sorting chamber and is fixedly connected to the sorting chamber by bolts.

[0034] A fine screen mounting frame 608 is installed below the sorting chamber. The rear end of the fine screen mounting frame 608 is connected to the double gravity screen 6 by bolts, and the front end of the fine screen mounting frame 608 is connected to the adjusting slide 602 by bolts. The rear part of the fine screen mounting frame 608 is directly connected to the sorting chamber by bolts, but its front part is connected to the adjusting slide 602 by bolts. Therefore, by loosening the bolts, the position of the front part of the fine screen mounting frame 608 relative to the adjusting slide 602 can be adjusted, and the inclination angle of the entire fine screen mounting frame 608 relative to the coarse screen mounting frame 607 changes. A guide plate 605 is fixedly installed between the coarse screen mounting frame 607 and the fine screen mounting frame 608. By setting up the guide plate 605, after the seeds are screened by the coarse screen mounting frame 607, the high-quality and plump seeds fall into the guide plate 605 from the rear, and then fall into the middle of the fine screen mounting frame 608 under the action of gravity for fine screening, which further improves the good seed rate. After two rounds of gravity screening, the material falls into the discharge plate 102 from the rear, completing the seed sorting and selection operation.

[0035] like Figure 13 and Figure 14 As shown, multiple sets of air vents 609A are fixedly provided on the partition 609, and multiple sets of air vents 607A are fixedly provided on the front side wall of the coarse sieve mounting frame 607. Each air vent 607A is fixedly connected to an external air duct 606. The diameter of the external air duct 606 is the same as the diameter of the connecting hose 609. The number of connecting hoses is less than the number of external air ducts 606, so that the air volume in the coarse sieve mounting frame 607 is greater than the air volume in the fine sieve mounting frame 608, allowing for more precise sieving when seeds enter the fine sieve mounting frame 608. Through the large inclination angle and large air volume of the coarse sieve mounting frame 607, seeds can be spread out quickly, impurities can be separated quickly, and the flow speed of seeds can be accelerated to avoid accumulation. The small inclination angle and small air volume of the lower fine sieve mounting frame 608 prolong the residence time of seeds on the sieve surface, reduce the airflow intensity, and allow seeds to contact the sieve surface more fully, achieving high-precision gravity separation of full grains, semi-full grains, diseased grains, and insect-damaged grains. This improves sorting efficiency while ensuring the precision of the selected products.

[0036] The other end of the external air duct 606 is connected to the air blowing chamber. Multiple sets of air vents 608A are fixedly opened on the bottom outer wall of the fine sieve mounting frame 608. Air vents 608A and 609A are connected by a connecting hose. Air sieve plates 610 are bolted to the top of both the coarse sieve mounting frame 607 and the fine sieve mounting frame 608. A sealing strip is installed at the bottom of the air sieve plate 610. After the air sieve plate 610 is connected to the mounting frame with bolts, the air entering the mounting frame is blown out through the air outlet gaps of the air sieve plate 610, slightly pushing the seeds upwards. The working principle of the gravity sieve is existing technology and will not be described in detail here.

[0037] A second drive mechanism 10 is also fixedly installed at the bottom of the fixed frame 1. The second drive mechanism 10 includes a second power component 1001 and a pull rod 1002. The pull rod 1002 is rotatably connected to the second power component 1001. The second power component 1001 includes a drive motor and an eccentric wheel fixedly connected to its output shaft. The eccentric wheel is rotatably connected to one end of the pull rod 1002, causing the double specific gravity screen 6 to shake. The other end of the pull rod 1002 is rotatably connected to the fixed connecting block 601. A compression spring assembly 105 is also fixedly connected to the bottom of the fixed frame 1. The other end of the compression spring assembly 105 is fixedly connected to the bottom of the double specific gravity screen 6. The compression spring assembly 105 can support the specific gravity screen and reduce the working pressure of the second drive mechanism 10. A discharge plate 102 is also fixedly connected to the rear end of the bottom of the fixed frame 1. Multiple sets of baffles 101 are bolted to the outside of the fixed frame 1. The baffles 101 provide protection for the equipment.

[0038] like Figure 16 , Figure 18 , Figure 20 and Figure 21 As shown, the adjustment mechanism 8 includes a mounting slide 801, a rotating rod 806, and a rotating wheel 804. Slider blocks are fixedly mounted at the four corners of the mounting slide 801, and the sliders are slidably connected to the slide rail 103 and bolted to the mounting slide 801. The mounting slide 801 is slidably connected to the slide rail 103. Lifting components 802 are rotatably connected to both sides of the mounting slide 801, and a locking component 803 is slidably connected to the upper part of the mounting slide 801. By setting the lifting components 802 and the locking components 803, when it is necessary to adjust the inclination angle of the screening mechanism 5 and the double-gravity screen 6, the locking component 803 is released, the lifting components 802 are rotated, and the position of the mounting slide 801 on the fixed frame 1 is adjusted, thereby changing the inclination degree of the screening mechanism 5 and the double-gravity screen 6. After adjustment, the locking component 803 is pushed to fix the position of the mounting slide 801.

[0039] The rotating rod 806 is rotatably connected to the mounting slide 801. The middle part of the rotating rod 806 is rotatably connected to the mounting slide 801, and multiple sets of grooves are formed on the middle part of the rotating rod 806. The retaining spring and the washer are inserted into the grooves to achieve axial fixation between the rotating rod 806 and the mounting slide 801. A drive screw tube 808 is provided on the outer wall of the inner end of the rotating rod 806. The inner wall of the drive screw tube 808 is slidably engaged with the outer wall of the rotating rod 806. The drive screw tube 808 and the rotating rod 806 are axially limited. A groove is also formed on the outer wall of the inner end of the rotating rod 806. The retaining spring and the washer are used to axially limit the drive screw tube 808. The drive screw tube 808 can rotate with the rotating rod 806.

[0040] A driven screw 807 is threadedly connected to the outer wall of the drive screw 808. The driven screw 807 is connected to the locking assembly 803 by bolts. When the drive screw 808 rotates, it drives the driven screw 807 to cause the locking assembly 803 to slide relative to the mounting slide 801. The locking assembly 803 can extend to both sides to press against the rack 104, or retract to the center to disengage from the rack 104. The rotating wheel 804 is rotatably connected to the middle of the mounting slide 801. A drive shaft 804A is fixedly connected to the center of the rotating wheel 804. A transmission wheel 805 is circumferentially fixed to the drive shaft 804A. The transmission wheel 805 is kept away from the rotating wheel 804 by the push of the compression spring 809, transmitting the rotation of the rotating wheel 804 to the rotating rod 806 or the drive screw 808. The compression spring 809 slides in contact with the side wall of the transmission wheel 805. The other end of the compression spring 809 is fixedly connected to the mounting slide 801.

[0041] like Figure 17 and Figure 19 As shown, the lifting assembly 802 includes a gear 802A, a turbine 802B, and a worm gear 802C. The worm gear 802C is fixedly connected to the outer end of the rotating rod 806. The rotation of the rotating rod 806 drives the worm gear 802C, which in turn drives the turbine 802B to rotate. The turbine 802B drives the gear 802A to rotate. The gear 802A meshes with the rack 104, causing the mounting slide 801 to slide on the fixed frame 1. The turbine 802B is circumferentially fixed to the gear 802A. Both the turbine 802B and the gear 802A are circumferentially fixed to the mounting slide. The frame 801 is rotatably connected, the gear 802A is meshed with the rack 104, the worm 802B is meshed with the worm gear 802C, the inner end of the rotating rod 806 is fixedly connected with a first retaining tooth 806A, the inner end of the drive solenoid 808 is fixedly connected with a second retaining tooth 808A, and a tooth groove 805A is fixedly opened on the outer wall of one end of the transmission wheel 805. The tooth groove 805A is circumferentially fixed to the drive shaft 804A. By circumferentially fixing the tooth groove 805A to the drive shaft 804A, the torque of the rotating wheel 804 is transmitted to the transmission wheel 805.

[0042] An external gear set 805C is fixedly connected to the outer wall of the other end of the transmission wheel cylinder 805. The external gear set 805C engages with the second locking tooth 808A. An internal gear set 805B is fixedly connected to the inner side wall of the transmission wheel cylinder 805. The internal gear set 805B engages with the first locking tooth 806A. The transmission wheel cylinder 805 is engaged with the drive screw tube 808 under the push of the compression spring 809. At this time, the torque of the rotating wheel 804 can drive the drive screw tube 808 to rotate, thereby pushing the locking component 803 to move and lock or release the mounting slide 801. When the transmission wheel cylinder 805 is pressed inward, the transmission wheel cylinder 805 engages with the rotating rod 806. At this time, the torque of the rotating wheel 804 can drive the lifting component 802 to rotate, thereby driving the lifting slide to slide up and down on the fixed frame 1.

[0043] Work process: 1. Air separation to remove light impurities Seeds are placed in hopper 201 and then lifted by the front of the double-channel elevator 2 into the air separation mechanism 3. The seeds are tumbled and fall inside the mechanism multiple times. The suction fan 4 sucks out light impurities such as dust, straw, husks, and light weed seeds, completing the initial air separation.

[0044] 2. Screening to remove impurities of different sizes After air separation, the seeds are lifted again by the rear of the dual-channel elevator 2 and sent to the screening mechanism 5. They are screened by the coarse screen 502 and the fine screen 503 to remove large impurities that are too large and small impurities such as fine mud and sand and fragments that are too small, thus completing the particle size classification screening.

[0045] 3. Dual-gravity fine sorting After screening, the seeds enter the double gravity screen 6. The drive mechanism 2 10 drives the double gravity screen 6 to reciprocate and vibrate, and drives the screening mechanism 5 to vibrate synchronously through the connecting rod assembly 7. The fan impeller 906 sends air to the blowing chamber. The seeds first pass through the upper coarse screen with a large inclination angle and large air volume to quickly spread and remove impurities. Then, they pass through the lower fine screen with a small inclination angle and small air volume for high-precision sorting, separating out difficult-to-process impurities such as semi-full seeds, insect-damaged seeds, diseased seeds, and weed seeds. Qualified and plump seeds are sent out from the discharge plate 102.

[0046] 4. Tilt adjustment and locking When different seeds need to be adapted, press the transmission wheel cylinder 805 inward, and rotate the wheel 804. Through the cooperation of the worm 802C, worm wheel, gear 802A, and rack 104, the adjustment mechanism 8 is driven to rise and fall along the slide rail 103 to adjust the inclination angle of the screening mechanism 5 and the double gravity screen 6. After the adjustment is completed, release the transmission wheel cylinder 805, rotate the wheel 804 to drive the locking component 803 to lock the rack 104, and fix the adjustment mechanism 8 in position to ensure stable sorting.

[0047] This invention integrates a dual-channel elevator 2, an air separation mechanism 3, a screening mechanism 5, and a double gravity screen 6 to perform high-precision sorting of light and low-density impurities, impurities with large size differences, and difficult-to-separate impurities of different densities in seeds, including half-full seeds with poor plumpness, insect-damaged seeds, diseased seeds, and weed seeds. The entire equipment has a compact structure and occupies a small area. By setting up the double gravity screen 6, the seeds are first coarsely sorted and then finely sorted, which greatly improves the sorting rate of good seeds. The inclination difference between the fine screen mounting frame 608 and the coarse screen mounting frame 607 can be adjusted separately to enhance the sieving effect on seeds.

Claims

1. A seed selection and sorting device for crops before sowing, characterized in that: The device includes a fixed frame, on which a slide rail and a rack are fixedly installed. An adjustment mechanism is slidably connected to the slide rail. A screening mechanism is located on the upper part of the fixed frame, and a double specific gravity screen is located below the screening mechanism. The fixed frame also has a connecting rod assembly, which includes a connecting rod one and a connecting rod two. The connecting rod one is rotatably connected to the top of the fixed frame, and the other end of the connecting rod one is rotatably connected to the front of the screening mechanism. A linkage connecting rod is rotatably connected to the rear of the screening mechanism, and the other end of the linkage connecting rod is rotatably connected to a transmission connecting rod. The middle part of the linkage connecting rod is rotatably connected to the top of the adjustment mechanism, and the lower part of the transmission connecting rod is rotatably connected to the front of the double specific gravity screen. One end of the connecting rod two is rotatably connected to the bottom of the adjustment mechanism, and the other end of the connecting rod two is coaxially rotatably connected to the front of the double specific gravity screen with the transmission connecting rod. A connecting rod three is rotatably connected to the rear of the double specific gravity screen, and the other end of the connecting rod three is rotatably connected to the middle of the fixed frame. The adjustment mechanism includes a mounting slide, a rotating rod, and a rotating wheel. The mounting slide is slidably connected to the slide rail. Lifting components are rotatably connected to both sides of the mounting slide. A locking component is slidably connected to the upper part of the mounting slide. The rotating rod is rotatably connected to the mounting slide. A drive screw is provided on the outer wall of the inner end of the rotating rod. A driven screw is threadedly connected to the outer wall of the drive screw. The driven screw is connected to the locking component by bolts. The rotating wheel is rotatably connected to the middle of the mounting slide. A drive shaft is fixedly connected to the center of the rotating wheel. A transmission wheel is circumferentially fixed to the drive shaft. A compression spring is slidably contacted on the side wall of the transmission wheel. The other end of the compression spring is fixedly connected to the mounting slide. The lifting assembly includes a gear, a worm gear, and a worm shaft. The worm shaft is fixedly connected to the outer end of the rotating rod, the worm gear is circumferentially fixed to the gear, and both the worm gear and the gear are rotatably connected to the mounting slide. The gear meshes with the rack, and the worm gear meshes with the worm shaft. A locking tooth is fixedly connected to the inner end of the rotating rod, and a locking tooth is fixedly connected to the inner end of the drive solenoid. A tooth groove is fixedly opened on the outer wall of one end of the transmission wheel cylinder, and the tooth groove is circumferentially fixed to the drive shaft. An external gear set is fixedly connected to the outer wall of the other end of the transmission wheel cylinder, and the external gear set cooperates with the locking tooth 2. An internal gear set is fixedly connected to the inner side wall of the transmission wheel cylinder, and the internal gear set cooperates with the locking tooth 1.

2. The seed selection and sorting device for crops before sowing as described in claim 1, characterized in that: A dual-channel elevator is fixedly installed on the left side wall of the fixed frame. A hopper is fixedly connected to the outer side of the bottom front end of the dual-channel elevator. A feed inlet is fixedly provided on the inner side of the bottom rear end of the dual-channel elevator. A double-bucket lifting mechanism is installed inside the dual-channel elevator. A drive motor is fixedly connected to the outer wall of the bottom of the dual-channel elevator. An outer discharge port is fixedly provided at the upper front end of the dual-channel elevator. An inner discharge port is fixedly provided at the upper rear end of the dual-channel elevator.

3. The seed selection and sorting device for crops before sowing as described in claim 1, characterized in that: A suction fan is fixedly installed on the right side wall of the fixed frame, and a drive mechanism is fixedly installed at the bottom of the fixed frame. The drive mechanism includes a power component, a pulley, and a pulley. The pulley is fixedly connected to the rotating shaft of the suction fan, and the pulley is connected to the power component through a transmission belt. A fan impeller is fixedly connected to the pulley, and the fan impeller is rotatably connected to the fixed frame. The pulley is connected to the power component through a transmission belt.

4. The seed selection and sorting device for crops before sowing as described in claim 1, characterized in that: A wind classifier is fixedly installed at the front of the fixed frame. The top of the wind classifier is connected to the external discharge port through a connecting hose. Multiple sets of material distribution plates are fixedly connected to the upper part of the wind classifier. Multiple sets of material discharge inclined plates are fixedly connected to the lower part of the wind classifier. The upper side wall of the wind classifier is connected to the air inlet port of the suction fan. An air inlet baffle is fixedly installed on the lower outer wall of the wind classifier. The bottom of the wind classifier is connected to the feed inlet.

5. The seed selection and sorting device for crops before sowing as described in claim 1, characterized in that: The top of the screening mechanism is fixedly provided with a second feed inlet, which is connected to the inner feed port through a second connecting hose. A coarse screen is slidably installed at the upper part of the screening mechanism, and a fine screen is slidably installed at the lower part of the screening mechanism. A pressure plate is connected to the outer wall of the front part of the screening mechanism by bolts. The rear part of the screening mechanism is fixedly provided with a coarse impurity outlet, a discharge port one, and a fine impurity outlet from top to bottom.

6. The seed selection and sorting device for crops before sowing as described in claim 1, characterized in that: The double-gravity screen has a waste material outlet fixedly installed on its front outer wall, a fixed connecting block fixedly connected to its rear outer wall, a feed inlet three fixedly opened on the top of the double-gravity screen, the feed inlet three being connected to the discharge outlet one via a connecting hose three, an adjusting groove fixedly opened on the side wall of the double-gravity screen, a partition fixedly connected inside the double-gravity screen, the partition dividing the interior of the double-gravity screen into a bottom blowing chamber and a top sorting chamber, a coarse screen mounting frame being bolted above the sorting chamber, a fine screen mounting frame being installed below the sorting chamber, the rear end of the fine screen mounting frame being bolted to the double-gravity screen, the front end of the fine screen mounting frame being bolted to the adjusting groove, and a guide plate fixedly installed between the coarse screen mounting frame and the fine screen mounting frame.

7. The seed selection and sorting device for crops before sowing as described in claim 6, characterized in that: Multiple sets of air vents are fixedly provided on the partition plate. Multiple sets of air vents are fixedly provided on the front side wall of the coarse screen mounting frame. Each air vent is fixedly connected to an external air duct, and the other end of the external air duct is connected to the air blowing chamber. Multiple sets of air vents are fixedly provided on the bottom outer wall of the fine screen mounting frame. Air vents ...

8. The seed selection and sorting device for crops before sowing as described in claim 1, characterized in that: The bottom of the fixed frame is also fixedly provided with a second drive mechanism, which includes a second power component and a pull rod. The pull rod is rotatably connected to the second power component, and the other end of the pull rod is rotatably connected to the fixed connecting block. The bottom of the fixed frame is also fixedly connected with a compression spring assembly, and the other end of the compression spring assembly is fixedly connected to the bottom of the double specific gravity screen. The rear end of the bottom of the fixed frame is also fixedly connected with a discharge plate. Multiple sets of baffles are bolted to the outside of the fixed frame.

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