A corn seed screening device for agricultural breeding

Abstract

The invention discloses a corn seed screening device for agricultural breeding, relates to the field of crop sorting, and solves the problem of insufficient screening accuracy. The corn seed screening device for agricultural breeding comprises a protective shell, a primary screening structure is installed at the top of the protective shell, and the primary screening structure performs primary screening on corn seeds, and the screening accuracy is adjusted according to the amount of sand contained in the corn seeds, a secondary screening structure is installed inside the protective shell, and the secondary screening structure performs fine screening and sowing on the corn seeds, the primary screening structure comprises a stone-carrying rubber roller, a toggle roller is provided on one side of the stone-carrying rubber roller, and the distance between the toggle roller and the stone-carrying rubber roller is adjustable, the secondary screening structure comprises a guide auger, and movable rollers are installed on both sides of the secondary screening structure; in the present invention, the stone-carrying rubber roller is pushed by rotating the distance adjustment knob, so as to adjust the screening accuracy according to the amount of sand contained in the corn seeds.

Description

Technical Field

[0001] The invention relates to the field of crop sorting, in particular to a corn seed screening device for agricultural breeding. Background Art

[0002] Seed sorting is an important part of agricultural production. It uses different physical and mechanical methods to separate foreign matter and impurities from seeds to improve seed purity and germination rate. It uses the differences in length, width and thickness of seeds to separate them through sieves of different shapes. For example, round hole sieves are used to separate seeds by width, long hole sieves are used to separate seeds by thickness, and socket tubes are used to separate seeds by length.

[0003] The existing Chinese patent with publication number CN118558596B discloses a seed screening and drying device for forestry planting. The invention relates to the field of screening technology and discloses a seed screening and drying device for forestry planting, including a base and a frame installed on the base, and the frame is connected to the box through a plurality of groups of buffer springs, the screen box is designed to be tilted downward, and a vibration motor is installed at the bottom of the screen box. The seed screening and drying device for forestry planting uses a mesh belt as a screen, and different parts of the mesh belt are used to screen seeds of different particle sizes. By adjusting the position of the mesh belt, various seeds can be screened;

[0004] However, the seed screening and drying device for forestry planting still has the following defects:

[0005] 1. Natural seeds vary in size and shape, and there are sand and stones in the unscreened seeds. Traditional devices cannot remove stones and small sand particles separately before screening. Because the surface of corn is smooth, contains moisture and is elastic, the biggest disadvantage when it moves on the flow line during the screening process is that the original good seed epidermis is scratched by the mixed sand and stones, and the film on the surface of the seed is worn and damaged, which affects the survival rate of the screened seeds. In addition, it is not convenient to intercept the screened sand and stones, and it is not convenient to adjust the screening accuracy according to the amount of sand in the corn seeds. In addition, it is not convenient to self-clean after screening the stones;

[0006] 2. It is not convenient to sow seeds separately according to their size, and it is not convenient to sow seeds directly after screening the seeds. The traditional work efficiency of screening seeds and sowing separately is low, and the traditional corn seed screening process is rough. Corn seeds need to be sown evenly through coarse screening, fine screening and drainage. Summary of the invention

[0007] The object of the present invention is to provide a corn seed screening device for agricultural breeding to solve the problems raised in the above-mentioned background technology.

[0008] The technical solution of the present invention is: a corn seed screening device for agricultural breeding, comprising a protective shell, a primary screening structure is installed on the top of the protective shell, and the primary screening structure performs primary screening on corn seeds, and a secondary screening structure is installed inside the protective shell, and the secondary screening structure performs fine screening and sowing on the corn seeds.

[0009] The primary screening structure includes a breathable frame, a transmission motor and a stone-catching rubber roller. The breathable frame is installed at the top of the protective shell. The transmission motor is installed on one side of the breathable frame, and the stone-catching rubber roller is installed on the output end of the transmission motor. A toggle roller is provided on one side of the stone-catching rubber roller, and the distance between the toggle roller and the stone-catching rubber roller is adjustable.

[0010] The multiple screening structure includes a guide auger, movable rollers are installed on both sides of the multiple screening structure, and the movable rollers are connected to the guide auger, and a long hole screen shovel and a round hole screen shovel are provided on the top of the guide auger.

[0011] Furthermore, a second transmission tooth is installed at the connection between the transmission motor and the stone-blocking rubber roller, and a first transmission tooth is provided on one side of the second transmission tooth, the first transmission tooth and the second transmission tooth are meshed for transmission, and the first transmission tooth is fixed to the toggle roller.

[0012] The surface of the stone-holding rubber roller is inlaid with annularly distributed stone-holding groove rings, and the stone-holding groove rings are composed of multiple groups of grooves smaller than the average size of corn seeds.

[0013] Wherein, a guide spiral track is inlaid in an annular shape on the surface of the stirring roller, and an auxiliary extrusion convex strip is provided at the gap of the guide spiral track.

[0014] Furthermore, an embedding groove is installed at one end of the inner side of the air permeable frame close to the shifting roller, and a second spring pressing sheet is arranged inside the embedding groove.

[0015] The side of the moving roller close to the embedded groove is connected to an embedded groove connecting rod, and one side of the embedded groove connecting rod is sleeved with an inner branch ring, and the contact surface of the inner branch ring and the embedded groove connecting rod is provided with a mating protrusion and a groove.

[0016] Wherein, the second spring pressing sheet is connected to one side of the inner branch ring.

[0017] Furthermore, a hinge point is installed on one side of the inner part of the air permeable frame, and a double-branched ring is hinged on the top of the hinge point, and the double-branched ring is sleeved on one side of the stone-blocking rubber roller.

[0018] Wherein, branches are installed on both sides of the double-branch ring, and the branches on one side are in contact and connected with the inner branch ring.

[0019] A fixed spiral groove is fixed on the side of the top of the hinge point away from the double-branch yak ring, and a pitch adjustment knob is installed inside the fixed spiral groove. A thread is provided at the connection between the pitch adjustment knob and the fixed spiral groove. A first spring pressing piece is installed at one end of the pitch adjustment knob, and the side of the first spring pressing piece away from the pitch adjustment knob is in contact with the double-branch yak ring and is sleeved on the branch on the other side of the double-branch yak ring.

[0020] Among them, a primary screening partition is provided at the connection between the bottom end of the breathable frame and the protective shell, and a secondary screening feed port is embedded at the top of the protective shell near the primary screening partition, and a push-pull handrail is installed at the bottom end of one side of the protective shell.

[0021] Furthermore, the multiple screening structure also includes a fan duct, and the fan duct is installed on one side of the protective shell, the output end of the motor inside the fan duct is connected to the first gear, and the first gear is provided with five groups, and the five groups of first gears are meshed and connected.

[0022] Wherein, a second gear is installed on one side of the protective housing close to the first gear, and the second gear is meshed with the first gear through meshing.

[0023] Among them, a first guide roller frame is installed on one side of the first gear, and a plurality of groups of anti-particle jamming plug-ins are installed on the surface of the first guide roller frame, a second guide roller frame is installed on one side of the second gear, and the ends of the first gear, the first guide roller frame, the second gear and the second guide roller frame away from each other are all connected to the protective shell.

[0024] Further, a small particle screen shovel is installed at the bottom end of the first guide roller frame, and a long hole screen shovel is installed on one side of the small particle screen shovel, a round hole screen shovel is installed on the side of the long hole screen shovel away from the small particle screen shovel, and a wire screen is installed on the side of the round hole screen shovel away from the long hole screen shovel, and the wire screen is provided with three groups,

[0025] Among them, the apertures of the small particle screen shovel, the long hole screen shovel, the round hole screen shovel and the wire screen become larger in sequence.

[0026] Furthermore, the bottom end of the small particle screening shovel is provided with a screen bag, and the bottom end of the screen bag is provided with a drainage net.

[0027] Among them, a large particle secondary screen plate is installed at the bottom end of the long hole screen shovel and the round hole screen shovel, and the bottom end of the large particle secondary screen plate is hinged with a Y-shaped bracket, and a support frame is installed at the bottom end of the protective shell, and one side of the support frame is hinged to the Y-shaped bracket.

[0028] Furthermore, a particle-holding fin is installed on one side of the top of the large particle secondary screen plate, and a concave groove is provided on the top of the particle-holding fin, and a straight plate fin is provided on one side of the particle-holding fin, and a guide cylindrical groove is provided on one side of the straight plate fin.

[0029] The large-particle secondary sieve plate is inclined toward the direction of the guide cylindrical groove, a guide auger is arranged inside the guide cylindrical groove, and the length of the guide auger is longer than the guide cylindrical groove.

[0030] The present invention provides a corn seed screening device for agricultural breeding by improvement, which has the following improvements and advantages compared with the prior art:

[0031] First, the stone-carrying rubber roller is pushed by rotating the distance-adjusting knob, so as to adjust the position between the stone-carrying rubber roller and the toggle roller according to the raw material state of the corn seeds, so as to adjust the screening accuracy according to the amount of sand contained in the corn seeds, and adjust the distance between the stone-carrying rubber roller and the toggle roller according to the demand. The distance between the stone-carrying rubber roller and the toggle roller needs to be greater than the average diameter of the corn seeds to avoid damaging the corn seed epidermis during the extrusion process. The stone-carrying rubber roller and the toggle roller are driven by the first transmission tooth and the second transmission tooth to rotate in opposite directions, so that when the material passes between the stone-carrying rubber roller and the toggle roller, the stone groove ring on the stone-carrying rubber roller intercepts the stone and sand that is less than or equal to the groove on the stone groove ring, and the guide spiral rail on the toggle roller on one side can drive the corn seed raw material to move to one side, so as to achieve the effect of evenly screening the corn seeds. In addition, the function of the evenly distributed auxiliary extrusion convex strips is to further compact the stone and sand stuck in the stone groove ring to avoid the stone falling during the rolling of the stone-carrying rubber roller;

[0032] The working principle of the distance adjustment structure of the stone-blocking rubber roller and the toggle roller is to rotate the distance adjustment knob, push the distance adjustment knob forward through the thread transmission, and after contacting the double-branch ring, push the double-branch ring to flip about the hinge point, thereby moving the position of the stone-blocking rubber roller, and the first spring pressure piece and the branches on one side of the double-branch ring are clamped to avoid misalignment. The function of the first spring pressure piece is to play a role in movement protection. At this time, the distance between the stone-blocking rubber roller and the toggle roller away from the second transmission tooth and the first transmission tooth becomes closer, so as to screen smaller stones;

[0033] In addition, the structure can also achieve the effect of self-cleaning. After the initial screening is completed, the initial screening partition is closed, and the branches on one side of the double-branch yak ring are continuously pushed to flip, and the branches on one side of the double-branch yak ring squeeze and push the first spring pressure plate, and the stone-holding rubber roller close to the second transmission tooth flips toward the far end, and the meshing locking relationship between the second transmission tooth and the first transmission tooth is released, and the clamping teeth on the first transmission tooth are engaged with the clamping groove on the embedded groove connecting rod. At this time, the transmission motor is reversed, and the stone-holding rubber roller follows the reverse rotation, and the shifting roller stops rotating. The distance between the shifting roller and the stone-holding rubber roller away from the side of the first transmission tooth is close, and the stone previously pressed into the stone clamping groove ring is scratched in the reverse direction by the auxiliary extrusion convex strip and falls off, so that the stone on one side of the stone clamping groove ring can be cleaned.

[0034] Secondly, flowing air is blown onto the air-permeable frame and the screen at the bottom through the fan duct, and the airflow assists the movement of seeds and removes dust on the surface of seeds. In addition, the motor inside the fan duct drives the first gear to rotate, and the first gear is provided with multiple groups, and the multiple groups of first gears are meshed and driven to drive the first guide roller frame on one side to rotate, and drive the second gear to rotate, and the second gear drives the second guide roller frame to rotate, thereby achieving the effect of assisting the movement of corn seeds. In addition, the entire flow line is downward, and the seeds will gradually move along the flow line due to gravity factors. In addition, when the first guide roller frame rotates, the anti-grain jamming plug-in will be inserted into the sieve hole to avoid blockage.

[0035] Then the corn seeds are finely screened through various levels of screens. Screen holes of different shapes can separate the corn seeds to improve purity and germination rate. After the corn seeds pass through the coarse and fine screens, the rolling mobile roller drives the guide auger to rotate, and the seeds of different sizes screened by the long hole screen shovel and the round hole screen shovel can be evenly guided out. The motor cost can be saved through transmission, and the sowing can be stopped when the device is stationary, which is convenient for direct sowing after the seeds are screened. The dust, straw and other small particles remaining in the primary screening structure are first screened out through the small particle screen shovel, and the small particles that fall directly into the screen bag at the bottom are collected and processed uniformly after sowing, and then separated by seed thickness through the long hole screen shovel, and then separated by seed width through the round hole screen shovel. When it reaches the wire screen, because the holes of the wire screen are larger than the diameter of ordinary corn, the flocs and lighter impurities such as corn silk or platycodon withering grass are generally left in this step, which are finally discharged through the rotation of the second guide roller frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0037] Figure 1 It is a schematic diagram of the three-dimensional explosion structure of the present invention;

[0038] Figure 2 This is a schematic diagram of the three-dimensional appearance structure of the primary screening structure of the present invention;

[0039] Figure 3 This is a schematic diagram of the three-dimensional explosion structure of the primary screening structure of the present invention;

[0040] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0041] Figure 5 It is a three-dimensional schematic diagram of the internal structure of the primary screening structure of the present invention;

[0042] Figure 6 It is a schematic diagram of the first three-dimensional explosion structure of the multiple screening structure of the present invention;

[0043] Figure 7 It is a three-dimensional structural schematic diagram of the multiple screening structure of the present invention;

[0044] Figure 8 It is a schematic diagram of the second three-dimensional explosion structure of the multiple screening structure of the present invention;

[0045] Fig. 9 It is a schematic diagram of the third three-dimensional explosion structure of the multiple screening structure of the present invention;

[0046] Fig.10 It is a three-dimensional structural schematic diagram of the multiple screening structure of the present invention;

[0047] Fig.11 It is a partially enlarged stereoscopic schematic diagram of the first guide roller frame of the present invention.

[0048] Description of reference numerals: 1. protective shell; 2. re-screening feed port; 3. re-screening structure; 301. support frame; 302. Y-shaped bracket; 303. secondary screen plate for large particles; 304. screen bag; 305. screen shovel for small particles; 306. long hole screen shovel; 307. round hole screen shovel; 308. wire screen; 309. fan duct; 310. first gear; 311. first guide roller frame; 312. anti-grain jamming plug-in; 313. second gear; 314. second guide roller frame; 315. grain jamming fin; 316. straight plate fin; 317. guide cylinder groove; 318. guide auger; 4. Moving roller; 5. Primary screening structure; 501. Breathable frame; 502. Transmission motor; 503. Stone-holding rubber roller; 504. Stirring roller; 505. First transmission tooth; 506. Second transmission tooth; 507. Guide spiral rail; 508. Auxiliary extrusion convex strip; 509. Stone-holding groove ring; 510. Distance adjustment knob; 511. Fixed spiral groove; 512. First spring pressing piece; 513. Hinge point; 514. Double-branch ring; 515. Inner branch ring; 516. Inner groove connecting rod; 517. Embedded groove; 518. Second spring pressing piece; 6. Push-pull handrail; 7. Primary screening partition. DETAILED DESCRIPTION

[0049] The following will be combined with the attached Figures 1 to 11 The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The present invention provides a corn seed screening device for agricultural breeding by improvement. Figure 1-11As shown in the figure, a corn seed screening device for agricultural breeding includes a protective shell 1, a primary screening structure 5 is installed on the top of the protective shell 1, and the primary screening structure 5 performs primary screening on corn seeds, and a secondary screening structure 3 is installed inside the protective shell 1, and the secondary screening structure 3 performs fine screening and sowing on corn seeds.

[0051] Among them, the primary screening structure 5 includes a breathable frame 501, a transmission motor 502 and a stone-catching rubber roller 503. The breathable frame 501 is installed at the top of the protective shell 1. The transmission motor 502 is installed on one side of the breathable frame 501, and the stone-catching rubber roller 503 is installed on the output end of the transmission motor 502. A toggle roller 504 is provided on one side of the stone-catching rubber roller 503, and the distance between the toggle roller 504 and the stone-catching rubber roller 503 is adjustable. By pushing the stone-catching rubber roller 503, the position between the stone-catching rubber roller 503 and the toggle roller 504 is adjusted according to the raw material state of the corn seeds, so as to adjust the screening accuracy according to the amount of sand contained in the corn seeds. The distance between the stone-catching rubber roller 503 and the toggle roller 504 is adjusted according to the demand. The distance between the stone-catching rubber roller 503 and the toggle roller 504 needs to be greater than the average diameter of the corn seeds to avoid damaging the corn seed skin during the extrusion process.

[0052] A second transmission tooth 506 is installed at the connection between the transmission motor 502 and the stone-blocking rubber roller 503, and a first transmission tooth 505 is provided on one side of the second transmission tooth 506. The stone-blocking rubber roller 503 and the toggle roller 504 rotate in opposite directions through the first transmission tooth 505 and the second transmission tooth 506. The first transmission tooth 505 and the second transmission tooth 506 are meshed for transmission, and the first transmission tooth 505 and the toggle roller 504 are fixed.

[0053] The surface of the stone-blocking rubber roller 503 is inlaid with annular stone-blocking groove rings 509, and the stone-blocking groove rings 509 are composed of multiple groups of grooves smaller than the average size of corn seeds, so that when the material passes between the stone-blocking rubber roller 503 and the shifting roller 504, the stone-blocking groove rings 509 on the stone-blocking rubber roller 503 can intercept the stone and sand smaller than or equal to the grooves on the stone-blocking groove rings 509.

[0054] The surface of the swivel roller 504 is inlaid with a guide spiral rail 507 in an annular shape, and the guide spiral rail 507 on one side of the swivel roller 504 can drive the corn seed raw material to move to one side, so as to evenly screen the corn seeds, and auxiliary extrusion convex strips 508 are provided at the gap of the guide spiral rail 507; in addition, the function of the evenly distributed auxiliary extrusion convex strips 508 is to further compact the gravel and sand stuck in the gravel groove ring 509, so as to prevent the gravel from falling during the rolling of the gravel rubber roller 503.

[0055] An embedding groove 517 is installed at one end of the inner side of the ventilating frame 501 close to the driving roller 504, and a second spring pressing piece 518 is arranged inside the embedding groove 517.

[0056] The side of the moving roller 504 close to the embedded groove 517 is connected to the embedded groove connecting rod 516, and one side of the embedded groove connecting rod 516 is sleeved with an inner branch ring 515, and the contact surface of the inner branch ring 515 and the embedded groove connecting rod 516 is provided with a mating protrusion and a groove.

[0057] The second spring pressing piece 518 is connected to one side of the inner branch ring 515;

[0058] A hinge point 513 is installed on one side of the inner part of the air permeable frame 501, and a double-branched ring 514 is hinged on the top of the hinge point 513. The double-branched ring 514 is sleeved on one side of the stone-blocking rubber roller 503.

[0059] The double-branch ring 514 has branches installed on both sides, and the branches on one side are in contact with the inner branch ring 515.

[0060] Among them, a fixed spiral groove 511 is fixed on the side of the top of the hinge point 513 away from the double-branched ring 514, and a distance adjustment knob 510 is installed inside the fixed spiral groove 511. A thread is provided at the connection between the distance adjustment knob 510 and the fixed spiral groove 511. The working principle of the distance adjustment structure for adjusting the stone-blocking rubber roller 503 and the toggle roller 504 is to rotate the distance adjustment knob 510, and push the distance adjustment knob 510 forward through thread transmission. After contacting the double-branched ring 514, the double-branched ring 514 is pushed to flip about the hinge point 513, thereby moving the stone-blocking rubber roller 503. The first spring pressing piece 512 is installed at one end of the distance adjustment knob 510. The function of the first spring pressing piece 512 is to play a role of mobile protection. The side of the first spring pressing piece 512 away from the distance adjustment knob 510 is in contact with the double-branch ring 514 and is sleeved on the branches on the other side of the double-branch ring 514. The first spring pressing piece 512 is clamped with the branches on one side of the double-branch ring 514 to avoid dislocation.

[0061] In addition, the structure can also achieve the effect of self-cleaning. After the initial screening is completed, the initial screening partition 7 is closed, and the branches on one side of the double-branch yak ring 514 are continuously pushed to flip. The branches on one side of the double-branch yak ring 514 squeeze and push the first spring pressing plate 512, and the stone-blocking rubber roller 503 close to the second transmission tooth 506 flips toward the far end, and the meshing locking relationship between the second transmission tooth 506 and the first transmission tooth 505 is released, and the clamping teeth on the first transmission tooth 505 are meshed with the clamping grooves on the embedded groove connecting rod 516. At this time, the transmission motor 502 is reversed, and the stone-blocking rubber roller 503 is reversed, and the toggle roller 504 stops rotating. The distance between the toggle roller 504 and the stone-blocking rubber roller 503 away from the first transmission tooth 505 is close, and the stones previously pressed into the stone clamping groove ring 509 are scraped in the opposite direction by the auxiliary extrusion convex strip 508 and fall off, so that the stones on one side of the stone clamping groove ring 509 can be cleaned;

[0062] Among them, a primary screening partition 7 is provided at the connection between the bottom end of the air permeable frame 501 and the protective shell 1, and a secondary screening feed port 2 is inlaid at the top of the protective shell 1 near the primary screening partition 7, and a push-pull handrail 6 is installed at the bottom end of one side of the protective shell 1;

[0063] The multiple screening structure 3 includes a fan duct 309, through which flowing air is blown to the air permeable frame 501 and the screen at the bottom, the airflow assists the movement of seeds and removes dust on the surface of seeds, and the fan duct 309 is installed on one side of the protective shell 1, and the output end of the motor inside the fan duct 309 is connected to the first gear 310, and the motor inside the fan duct 309 drives the first gear 310 to rotate, and the first gear 310 is provided with five groups, and the five groups of first gears 310 are meshed and connected.

[0064] A second gear 313 is installed on one side of the protective housing 1 near the first gear 310, and the second gear 313 and the first gear 310 are meshed with each other.

[0065] A first guide roller frame 311 is installed on one side of the first gear 310, and multiple groups of first gears 310 are meshed and driven to drive the first guide roller frame 311 on one side to rotate, and drive the second gear 313 to rotate.

[0066] A plurality of anti-grain jamming plug-ins 312 are installed on the surface of the first guide roller frame 311. When the first guide roller frame 311 rotates, the anti-grain jamming plug-ins 312 will be inserted into the sieve hole to avoid blockage. A second guide roller frame 314 is installed on one side of the second gear 313. The second gear 313 drives the second guide roller frame 314 to rotate, thereby achieving the function of assisting the movement of corn seeds. In addition, the entire flow line is downward, and the seeds will gradually move along the flow line due to gravity factors. The ends of the first gear 310, the first guide roller frame 311, the second gear 313 and the second guide roller frame 314 that are away from each other are all connected to the protective shell 1.

[0067] A small particle sieve shovel 305 is installed at the bottom end of the first guide roller frame 311, and a long hole sieve shovel 306 is installed on one side of the small particle sieve shovel 305, and the long hole sieve shovel 306 is used to separate seeds according to thickness, and a round hole sieve shovel 307 is installed on the side of the long hole sieve shovel 306 away from the small particle sieve shovel 305, and the round hole sieve shovel 307 is used to separate seeds according to width, and a wire screen 308 is installed on the side of the round hole sieve shovel 307 away from the long hole sieve shovel 306, and the wire screen 308 is provided with three groups,

[0068] Among them, the apertures of the small particle sieve shovel 305, the long hole sieve shovel 306, the round hole sieve shovel 307 and the wire sieve 308 are the largest in order;

[0069] When reaching the wire screen 308, since the holes of the wire screen 308 are larger than the diameter of ordinary corn, what remains at this step are generally flocculent matter such as corn silk or platycodon grass and lighter impurities, which are finally discharged by the second guide roller frame 314.

[0070] The bottom of the small particle screening shovel 305 is provided with a screen bag 304, and the bottom of the screen bag 304 is provided with a drainage net. The small particles such as dust and straw remaining in the primary screening structure 5 are first screened out by the small particle screening shovel 305, and directly fall into the screen bag 304 at the bottom and are collected and processed uniformly after sowing.

[0071] Among them, the bottom ends of the long hole sieve shovel 306 and the round hole sieve shovel 307 are installed with large particle secondary sieve plates 303, and the bottom ends of the large particle secondary sieve plates 303 are hinged with a Y-shaped bracket 302, and the bottom end of the protective shell 1 is installed with a support frame 301, and one side of the support frame 301 is hinged with the Y-shaped bracket 302;

[0072] A particle-holding fin 315 is installed on one side of the top of the large particle secondary screen plate 303, and a concave groove is provided on the top of the particle-holding fin 315. A straight plate fin 316 is provided on one side of the particle-holding fin 315, and a guide cylindrical groove 317 is provided on one side of the straight plate fin 316.

[0073] The multiple screening structure 3 further includes a guide auger 318, movable rollers 4 are installed on both sides of the multiple screening structure 3, and the movable rollers 4 are connected to the guide auger 318, and a long hole screen shovel 306 and a round hole screen shovel 307 are provided at the top of the guide auger 318;

[0074] Among them, the large-particle secondary sieve plate 303 is inclined in the direction of the guide cylindrical groove 317, and a guide auger 318 is arranged inside the guide cylindrical groove 317, and the length of the guide auger 318 is longer than the guide cylindrical groove 317, and then the corn seeds are finely screened through various levels of screens, and the sieve holes of different shapes can separate the corn seeds to improve the purity and germination rate. After the corn seeds pass through the coarse and fine screens, the guide auger 318 is driven to rotate by the rolling moving roller 4, and the seeds of different sizes screened by the long hole screen shovel 306 and the round hole screen shovel 307 can be evenly guided out. The motor cost can be saved through transmission, and the sowing can be stopped when the device is stationary, so that the seeds can be drained into the soil for direct sowing after screening, thereby improving work efficiency.

[0075] Working principle: First, the stone-carrying rubber roller 503 is pushed by rotating the distance adjustment knob 510, so as to adjust the position between the stone-carrying rubber roller 503 and the toggle roller 504 according to the raw material state of the corn seeds, so as to adjust the screening accuracy according to the amount of sand contained in the corn seeds. The distance between the stone-carrying rubber roller 503 and the toggle roller 504 is adjusted according to the demand. The distance between the stone-carrying rubber roller 503 and the toggle roller 504 needs to be larger than the average diameter of the corn seeds to avoid damaging the corn seed epidermis during the squeezing process. The stone-carrying rubber roller 503 and the toggle roller 504 are driven by the first transmission tooth 505 and the second transmission tooth 506. It rotates in the opposite direction, so that when the material passes between the stone-holding rubber roller 503 and the stirring roller 504, the stone groove ring 509 on the stone-holding rubber roller 503 intercepts the stone and sand that is less than or equal to the groove on the stone groove ring 509, and the guide spiral rail 507 on the stirring roller 504 on one side can drive the corn seed raw material to move to one side, so as to achieve the effect of uniformly screening the corn seeds. In addition, the function of the evenly distributed auxiliary extrusion ridges 508 is to further compact the stone and sand stuck in the stone groove ring 509, so as to prevent the stone from falling during the rolling of the stone-holding rubber roller 503.

[0076] Then, the working principle of the distance adjustment structure of the stone-blocking rubber roller 503 and the toggle roller 504 is to rotate the distance adjustment knob 510, and push the distance adjustment knob 510 forward through the thread transmission, and after contacting the double-branch ring 514, push the double-branch ring 514 to flip about the hinge point 513, so as to move the position of the stone-blocking rubber roller 503, and the first spring pressing piece 512 and the branches on one side of the double-branch ring 514 are engaged to avoid misalignment. The role of the first spring pressing piece 512 is to play a role of mobile protection. At this time, the distance between the stone-blocking rubber roller 503 and the toggle roller 504 away from the second transmission tooth 506 and the first transmission tooth 505 becomes closer, so as to screen smaller stones;

[0077] In addition, the structure can also achieve the effect of self-cleaning. After the initial screening is completed, the initial screening partition 7 is closed, and the branches on one side of the double-branch yak ring 514 are continuously pushed to flip, and the branches on one side of the double-branch yak ring 514 squeeze and push the first spring pressing plate 512, and the stone-blocking rubber roller 503 close to the second transmission tooth 506 flips toward the far end, and the meshing locking relationship between the second transmission tooth 506 and the first transmission tooth 505 is released, and the locking tooth on the first transmission tooth 505 is meshed with the locking groove on the embedded groove connecting rod 516. At this time, the transmission motor 502 is reversed, and the stone-blocking rubber roller 503 is reversed accordingly, and the toggle roller 504 stops rotating. The distance between the toggle roller 504 and the stone-blocking rubber roller 503 away from the first transmission tooth 505 is close, and the stone previously pressed into the stone slot ring 509 is scratched in the opposite direction by the auxiliary extrusion convex strip 508 and falls off, so that the stone on one side of the stone slot ring 509 can be cleaned.

[0078] Finally, the flow of air is blown toward the air permeable frame 501 and the screen at the bottom through the fan duct 309, and the airflow assists the movement of the seeds and removes the dust on the surface of the seeds. In addition, the motor inside the fan duct 309 drives the first gear 310 to rotate, and the first gear 310 is provided with multiple groups, and the multiple groups of first gears 310 are meshed and driven to drive the first guide roller frame 311 on one side to rotate, and drive the second gear 313 to rotate, and the second gear 313 drives the second guide roller frame 314 to rotate, thereby achieving the effect of assisting the movement of corn seeds. In addition, the entire flow line is downward, and the seeds will gradually move along the flow line due to gravity factors. In addition, when the first guide roller frame 311 rotates, the anti-grain plug-in 312 will be inserted into the sieve hole to avoid blockage. Then, the corn seeds are finely screened through the sieves at various levels. The sieve holes of different shapes can separate the corn seeds to improve the purity and germination rate. After passing through the coarse and fine screens, the guide auger 318 is driven to rotate by the rolling mobile roller 4, and the seeds of different sizes screened by the long hole screen shovel 306 and the round hole screen shovel 307 can be evenly guided out. The motor cost can be saved through transmission, and the sowing can be stopped when the device is stationary, so that the seeds can be drained into the soil for direct sowing after screening the seeds, thereby improving work efficiency. The small particles such as dust and straw remaining in the primary screening structure 5 are first screened out by the small particle screen shovel 305, and directly fall into the screen bag 304 at the bottom for collection and unified treatment after sowing, and then separated by seed thickness through the long hole screen shovel 306, and then separated by seed width through the round hole screen shovel 307. When it reaches the wire screen 308, because the holes of the wire screen 308 are larger than the diameter of ordinary corn, the flocs and lighter impurities such as corn silk or platycodon withering grass are generally left at this step, and are finally discharged by the second guide roller frame 314 through rotation.

[0079] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A corn seed screening device for agricultural breeding, comprising a protective housing (1), characterized in that: A primary screening structure (5) is installed at the top of the protective shell (1), and the primary screening structure (5) performs primary screening on corn seeds. A secondary screening structure (3) is installed inside the protective shell (1), and the secondary screening structure (3) performs fine screening and sowing on the corn seeds. The primary screening structure (5) comprises a breathable enclosure (501), a transmission motor (502) and a stone-catching rubber roller (503); the breathable enclosure (501) is mounted on the top of the protective housing (1); the transmission motor (502) is mounted on one side of the breathable enclosure (501); and the stone-catching rubber roller (503) is mounted on the output end of the transmission motor (502); a toggle roller (504) is provided on one side of the stone-catching rubber roller (503); and the distance between the toggle roller (504) and the stone-catching rubber roller (503) is adjustable. The surface of the stone-holding rubber roller (503) is inlaid with stone-holding groove rings (509) distributed in an annular pattern, and the stone-holding groove rings (509) are composed of a plurality of groups of grooves smaller than the average size of corn seeds. The surface of the moving roller (504) is inlaid with a guide spiral track (507) in an annular shape, and an auxiliary extrusion convex strip (508) is provided at the gap of the guide spiral track (507); The multiple screening structure (3) comprises a diversion auger (318), movable rollers (4) are installed on both sides of the multiple screening structure (3), and the movable rollers (4) are connected to the diversion auger (318), and a long hole screening shovel (306) and a round hole screening shovel (307) are provided at the top of the diversion auger (318).

2. The corn seed screening device for agricultural breeding according to claim 1, characterized in that: A second transmission tooth (506) is installed at the connection between the transmission motor (502) and the stone-blocking rubber roller (503), and a first transmission tooth (505) is provided on one side of the second transmission tooth (506); the first transmission tooth (505) and the second transmission tooth (506) are meshed for transmission, and the first transmission tooth (505) and the shifting roller (504) are fixed.

3. The corn seed screening device for agricultural breeding according to claim 2, characterized in that: An embedding groove (517) is installed at one end of the inner side of the ventilated surrounding frame (501) close to the driving roller (504), and a second spring pressing sheet (518) is provided inside the embedding groove (517). The side of the moving roller (504) close to the embedded groove (517) is connected to an embedded groove connecting rod (516), and one side of the embedded groove connecting rod (516) is sleeved with an inner branch ring (515), and the contact surfaces of the inner branch ring (515) and the embedded groove connecting rod (516) are provided with mating protrusions and grooves. Wherein, the second spring pressing sheet (518) is connected to one side of the inner branch ring (515).

4. The corn seed screening device for agricultural breeding according to claim 3, characterized in that: A hinge point (513) is installed on one side of the interior of the ventilated enclosure frame (501), and a double-branched circular ring (514) is hingedly connected to the top of the hinge point (513). The double-branched circular ring (514) is sleeved on one side of the stone-carrying rubber roller (503). Wherein, branches are installed on both sides of the double-branch ring (514), and the branches on one side are in contact and connected with the inner branch ring (515). A fixed spiral groove (511) is fixed to a side of the top of the hinge point (513) away from the double-branch yak ring (514), and a pitch adjustment knob (510) is installed inside the fixed spiral groove (511). A thread is provided at the connection between the pitch adjustment knob (510) and the fixed spiral groove (511). A first spring pressing piece (512) is installed at one end of the pitch adjustment knob (510), and a side of the first spring pressing piece (512) away from the pitch adjustment knob (510) is in contact with and connected to the double-branch yak ring (514), and is sleeved on the branch on the other side of the double-branch yak ring (514). A primary screening partition (7) is provided at the connection between the bottom end of the air permeable frame (501) and the protective shell (1), and a secondary screening feed port (2) is embedded at the top end of the protective shell (1) close to the primary screening partition (7), and a push-pull handrail (6) is installed at the bottom end of one side of the protective shell (1).

5. The corn seed screening device for agricultural breeding according to claim 1, characterized in that: The multiple screening structure (3) further comprises a fan duct (309), and the fan duct (309) is installed on one side of the protective housing (1), the output end of the motor inside the fan duct (309) is connected to a first gear (310), and the first gear (310) is provided with five groups, and the five groups of first gears (310) are meshed and connected. A second gear (313) is installed on a side of the protective housing (1) close to the first gear (310), and the second gear (313) and the first gear (310) are meshed with each other. A first guide roller frame (311) is installed on one side of the first gear (310), and a plurality of groups of anti-grain jamming plug-ins (312) are installed on the surface of the first guide roller frame (311); a second guide roller frame (314) is installed on one side of the second gear (313); and ends of the first gear (310), the first guide roller frame (311), the second gear (313) and the second guide roller frame (314) that are away from each other are all connected to the protective shell (1).

6. The corn seed screening device for agricultural breeding according to claim 5, characterized in that: A small particle screen shovel (305) is installed at the bottom end of the first guide roller frame (311), and a long hole screen shovel (306) is installed on one side of the small particle screen shovel (305), a round hole screen shovel (307) is installed on the side of the long hole screen shovel (306) away from the small particle screen shovel (305), and a wire screen (308) is installed on the side of the round hole screen shovel (307) away from the long hole screen shovel (306), and three groups of wire screens (308) are provided. The apertures of the small particle screen shovel (305), the long hole screen shovel (306), the round hole screen shovel (307) and the wire screen (308) increase in sequence.

7. The corn seed screening device for agricultural breeding according to claim 6, characterized in that: The bottom end of the small particle screening shovel (305) is provided with a screen bag (304), and the bottom end of the screen bag (304) is provided with a drainage net. The bottom ends of the long-hole sieve shovel (306) and the round-hole sieve shovel (307) are installed with large-particle secondary sieve plates (303), and the bottom ends of the large-particle secondary sieve plates (303) are hinged with a Y-shaped bracket (302); the bottom end of the protective housing (1) is installed with a support frame (301), and one side of the support frame (301) is hinged with the Y-shaped bracket (302).

8. The corn seed screening device for agricultural breeding according to claim 7, characterized in that: One side of the top of the large-particle secondary sieve plate (303) is provided with a particle-catching fin (315), and a concave card slot is provided at the top of the particle-catching fin (315). One side of the particle-catching fin (315) is provided with a straight fin (316), and a diversion cylinder groove (317) is provided on one side of the straight fin (316). Among them, the large-particle secondary sieve plate (303) is inclined towards the direction of the diversion cylinder groove (317). A diversion auger (318) is arranged inside the diversion cylinder groove (317), and the length of the diversion auger (318) is longer than that of the diversion cylinder groove (317).

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