A device for grading and screening grains and removing cracks

Abstract

The present invention discloses a device for removing cracks by grading and screening grains, and relates to the technical field of grain screening, including a screening box fixedly connected with a feed pipe and a discharge pipe, wherein the screening box is fixedly installed with a plurality of grading arc plates from top to bottom, and the mesh apertures of the grading arc plates are sequentially changed; a plurality of sub-screening plates 1 and 2 are rotatably installed in the screening box, and the sub-screening plates 1 and 2 are used in a one-to-one correspondence, and a driving sub-screening component is installed between the screening box and the plurality of sub-screening plates 1 and 2. The advantages are: by cooperating with the rotatable sub-screening plates 1 and 2, the screening can be better performed, and while the sub-screening plates 1 and 2 rotate, the impact rollers provided in a matching manner can be driven to reciprocate in the vertical direction, which can further play an anti-blocking effect; at the same time, when the airflow is used to clear the blockage of the grading arc plates, the grains with cracks and the grains with a smaller volume can also be directly screened to ensure the screening effect.

Description

Technical Field

[0001] The invention relates to the technical field of miscellaneous grain screening, and in particular to a device for classifying and screening miscellaneous grains and removing cracks. Background Art

[0002] Coarse grains mainly refer to whole grains, which are often eaten in our daily life and have many benefits for the body of the eater. Before bagging, the factory will screen the coarse grains and remove the broken coarse grains; the volume of the broken coarse grains is relatively small, and the weight is relatively light compared with the coarse grains of the same volume; the existing technology still has the following shortcomings when screening the broken coarse grains: a rotatable rod body is provided, and the rod body is used to cooperate with the screen to stir the coarse grains on the screen, but this stirring effect is general. When there are many coarse grains, it cannot be screened quickly and well; and the coarse grains with a volume close to that of the broken coarse grains are not effectively screened, and the screening effect is general. For this reason, we propose a device for grading and screening coarse grains to remove the broken ones to solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to solve the problems raised in the background technology and to propose a device for grading, screening and removing cracks of grains.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for grading and screening grains to remove cracks, comprising a screening box fixedly connected to a feed pipe and a discharge pipe, wherein the screening box is fixedly installed with a plurality of grading arc plates from top to bottom, and the mesh apertures of the grading arc plates are changed in sequence;

[0006] A plurality of sub-screening plates 1 and 2 are rotatably installed in the screening box, and the sub-screening plates 1 and 2 are used in a one-to-one correspondence, and a driving sub-screening component is installed between the screening box and the plurality of sub-screening plates 1 and 2;

[0007] The screening box is provided with multiple groups of screening auxiliary components, and the screening auxiliary components are located between the corresponding two grading arc plates;

[0008] A connecting seat is fixedly installed on the outside of the screening box, and the connecting seat is hollow. An air pump is fixedly connected to the connecting seat. A swing screening component and a wind screen component are installed between the screening box and the connecting seat, and a feeding component that cooperates with the wind screen component is installed on the screening box.

[0009] In the above-mentioned device for grading, screening and removing cracks of grains, a plurality of inclined rods are fixedly installed at both ends of the first and second screening plates, a plurality of circular grooves are opened on the inner walls of both sides of the screening box, and the inclined rods are located in the corresponding circular grooves.

[0010] In the above-mentioned device for grading and screening grains to remove cracks, the driving screening component includes a rotating shaft, a transmission structure, and a screening motor. A rotating shaft is rotatably mounted on each of the plurality of circular grooves on the same side, and the inclined rod is fixedly arranged on the corresponding rotating shaft. The plurality of rotating shafts are jointly installed with a transmission structure. A screening motor is fixedly installed on the outside of the screening box, and one end of one of the rotating shafts is rotatably mounted on the screening box and is fixedly connected to the driving end of the screening motor.

[0011] A protective cover is fixedly installed on the outside of the screening box, and the side where the protective cover is connected to the screening box is opened, and one end of the rotating shaft rotates through the screening box and is rotatably installed on the protective cover, and the transmission structure is located in the protective cover, and one end of one of the rotating shafts is fixedly connected to the driving end of the screening motor.

[0012] In the above-mentioned device for removing cracks by grading and screening grains, the screening auxiliary component includes a strip magnetic block 1, a limit assembly, a mounting rod frame, an impact roller, and a strip magnetic block 2. A strip magnetic block 1 is fixedly mounted on each of the screening plates 1 and 2, and the curvature of the outer arc surface of the strip magnetic block 1 is the same as that of the screening plates 1 and 2. A plurality of mounting rod frames are installed in the screening box through a plurality of sets of limit assemblies, and an impact roller and a strip magnetic block 2 are fixedly mounted on each of the mounting rod frames;

[0013] The mounting rod frame is composed of two cross bars and two vertical blocks, and the vertical block is fixed between the two cross bars. The length of the upper cross bar is greater than that of the lower cross bar. The upper cross bar is installed on the limiting assembly, and the lower cross bar is fixedly connected to the second strip magnetic block.

[0014] In the above-mentioned device for grading, screening and removing cracks of grains, the limiting assembly includes a strip slide and a limiting slider. The inner walls on both sides of the screening box are provided with multiple strip slides, and a limiting slider is slidably installed in each of the strip slides, and the two ends of the mounting rod frame are respectively fixedly installed on the corresponding two limiting sliders.

[0015] In the above-mentioned device for grading, screening and removing cracks of grains, an elastic sheet and two baffles are fixedly mounted on each of the impact rollers, and the impact roller is located between the corresponding two baffles.

[0016] In the above-mentioned device for grading and screening grains and removing cracks, the swing screening component includes an annular groove, an annular seat, a rotating ring, an air pipe, and a driving swing assembly. A plurality of annular grooves are provided on the side of the screening box away from the screening motor, and the number of the annular grooves is one more than the number of the circular grooves. An annular seat is fixedly installed on each of the annular grooves, and the annular seat is hollow. A connecting pipe rack is fixedly installed between the connecting seat and the plurality of annular seats. Each of the annular seats is sealed and rotatably connected to a rotating ring, and each of the rotating rings is fixedly connected to a plurality of air pipes.

[0017] The connecting pipe rack includes a horizontal pipe, a vertical pipe and a plurality of screening pipes 1. The side of the connecting seat away from the air pump is fixedly connected with a horizontal pipe, one end of the horizontal pipe is fixedly connected with a vertical pipe, both ends of the vertical pipe are sealed, a plurality of screening pipes 1 are fixedly connected on the vertical pipe, and one end of the screening pipe 1 passes through the screening box and is connected with the corresponding annular seat, and a valve is installed on the horizontal pipe;

[0018] The air pipe is composed of a circular pipe and a one-way air pipe, and the one-way air pipe is fixedly connected to the corresponding air pipe at equal intervals, and one end of the air pipe is sealed, and the other end is fixedly connected to the corresponding rotating ring;

[0019] A plurality of fixing blocks are fixedly installed between the screening box and the connecting seat.

[0020] In the above-mentioned device for grading and screening grains and removing cracks, the driving swing assembly includes an arc-shaped rack, a gear, a toothed plate, a cross plate, and an electric telescopic rod. An arc-shaped rack is fixedly installed on each rotating ring. A gear meshing with the arc-shaped rack is rotatably installed on the screening box. A plurality of toothed plates are slidably installed through the screening box, and the toothed plates mesh with the corresponding gears.

[0021] One ends of the plurality of tooth plates all penetrate the screening box and are fixedly mounted with a transverse plate, and an electric telescopic rod matched with the transverse plate is mounted on the screening box.

[0022] In the above-mentioned device for grading, screening and removing cracks of miscellaneous grains, the feeding component includes a gathering plate, a feeding pipe and an inclined plate. The gathering plate is fixedly installed in the screening box, and the gathering plate is located below the lowest grading arc plate. The gathering plate is fixedly connected with the feeding pipe, and the inclined plate is fixedly installed in the screening box.

[0023] In the above-mentioned device for grading, screening and removing cracks of grains, the wind screen component includes a screening pipe 2 and a valve. The screening pipe 2 is fixedly connected to the horizontal pipe, and the lower end of the screening pipe 2 is located in the screening box and cooperates with the feed pipe. Valves are also installed on the feed pipe and the screening pipe 2.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1: Use multiple grading arc plates for grading screening, and use the rotating sieve plate 1 and sieve plate 2 to cooperate, which can improve the screening and have a certain anti-blocking effect. When the sieve plate 1 and sieve plate 2 rotate, the matching impact roller can be driven to reciprocate in the vertical direction. The impact force generated by the rapid upward movement of the impact roller on the grading arc plate can further have an anti-blocking effect.

[0026] 2: On the one hand, the airflow can clear the blockage of the corresponding grading arc plate, and on the other hand, it can directly cooperate with the first and second screening plates to directly impact the grains, so that their movement is dispersed, which is convenient for better material dropping; at the same time, through the cooperation of the screening pipe 2, the feeding pipe and the inclined plate, the broken grains and the smaller grains can be directly screened to ensure the screening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of a device for grading, screening and removing cracks of grains proposed by the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;

[0029] Figure 3 for Figure 2 A schematic diagram of the structure after the screening box is rotated at a certain angle and cut into sections;

[0030] Figure 4 for Figure 3 A structural diagram of the screening box from another perspective;

[0031] Figure 5 for Figure 1 A schematic diagram of the structure after the screening box is rotated at a certain angle and cut into sections;

[0032] Figure 6 for Figure 5 Schematic diagram of multiple graded arc plates after they are partially rotated at a certain angle;

[0033] Figure 7 for Figure 6 A front view of

[0034] Figure 8 for Figure 5 Schematic diagram of the middle annular seat portion after being rotated by a certain angle;

[0035] Fig. 9 for Figure 5 Front view after removing the filter box.

[0036] In the figure: 1. screening box; 2. grading arc plate; 3. rotating shaft; 4. inclined rod; 5. sub-screening plate 1; 6. sub-screening plate 2; 7. transmission structure; 8. protective cover; 9. screening motor; 10. circular groove; 11. strip magnetic block 1; 12. strip slide; 13. limit slider; 14. mounting rod frame; 15. impact roller; 16. strip magnetic block 2; 17. baffle; 18. annular groove; 19. annular seat; 20. rotating ring; 21. air pipe; 22. connecting seat; 23. air pump; 24. arc rack; 25. gear; 26. tooth plate; 27. gathering plate; 28. feeding pipe; 29. ​​inclined plate; 30. screening pipe 2; 31. screening pipe 1; 32. valve; 33. fixing block. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0038] Reference Figure 1-Figure 9 , a device for grading and screening grains and removing cracks, comprising a screening box 1 fixedly connected with a feed pipe and a discharge pipe. The arrangement of the feed pipe and the discharge pipe on the screening box 1 is too common, so they are not illustrated in the figure; the screening box 1 is fixedly installed with multiple grading arc plates 2 from top to bottom, and the mesh apertures of the grading arc plates 2 are gradually changed; specifically, they decrease in sequence from top to bottom, and at the same time, multiple door bodies cooperating with the grading arc plates 2 are opened on one side of the screening box 1. The door bodies can be opened regularly to collect the grains that have been screened and intercepted. The door body can be specifically opened on one side of the protective cover 8. The specific method of collecting the grains does not involve innovation, and various existing methods can be used, which will not be elaborated here.

[0039] A plurality of sub-screen plates 1 5 and sub-screen plates 2 6 are rotatably installed in the screening box 1, and the sub-screen plates 1 5 and the sub-screen plates 2 6 are used in a one-to-one correspondence. The sub-screen plates 1 5 and the sub-screen plates 2 6 are both arc-shaped, and the outer diameter of the sub-screen plates 2 6 is less than or equal to the inner diameter of the sub-screen plates 1 5 . The outer diameter of the sub-screen plates 1 5 is less than or equal to the inner diameter of the corresponding grading arc plate 2, and is preferably less than the setting; the rotation of the sub-screen plates 1 5 and the sub-screen plates 2 6 is used to lift the grains on the corresponding grading arc plate 2, and the heights of the sub-screen plates 1 5 and the sub-screen plates 2 6 when they are at the lowest point are not the same, so the grains brought up during rotation also have a certain thickness difference (such as the sub-screen plates 1 5 is mainly used to lift the miscellaneous grains in the middle and lower positions, and the sub-screening plate 2 6 is mainly used to lift the miscellaneous grains in the middle and upper positions), so as to lift and screen as many miscellaneous grains as possible, a plurality of grooves can be opened on the inner walls of the sub-screening plate 1 5 and the sub-screening plate 2 6, and the miscellaneous grains can be driven to move by the grooves, or strip inclined plates can be fixed on the inner walls of the sub-screening plate 1 5 and the sub-screening plate 2 6, and the strip inclined plates can be used to drive the miscellaneous grains to move to a certain height. The strip inclined plates can be set in an L shape, so as to better drive the miscellaneous grains to move, but at this time, it is necessary to pay attention to the size setting of the strip inclined plates to meet the normal operation between the sub-screening plates 1 5 and the sub-screening plates 2 6.

[0040] Reference Figure 1-Figure 9 A driving screening component is installed between the screening box 1 and the multiple screening plates 1 5 and 2 6; the driving screening component is used to control the multiple screening plates 1 5 and 2 6 to move together, and utilize the movement of the screening plates 1 5 and 2 6 to better perform screening. At the same time, when the screening plate 1 5 moves from the highest point to the lowest point, it also directly has a certain pressing and clearing effect on the grains intercepted on the grading arc plate 2; multiple inclined rods 4 are fixedly installed at both ends of the screening plates 1 5 and 2 6, and multiple circular grooves 10 are opened on the inner walls of both sides of the screening box 1, and the inclined rods 4 are located in the corresponding circular grooves 10. The setting of the inclined rods 4 is convenient for driving the screening plates 1 5 and 2 6 to rotate, and it is satisfied that the grading arc plate 2 will not be affected during the rotation process.

[0041] The driving screening component includes a rotating shaft 3, a transmission structure 7, and a screening motor 9. A rotating shaft 3 is rotatably installed on each of the multiple circular grooves 10 on the same side, and the inclined rod 4 is fixedly arranged on the corresponding rotating shaft 3. The multiple rotating shafts 3 are jointly installed with the transmission structure 7. The screening motor 9 is fixedly installed on the outside of the screening box 1, and one end of one of the rotating shafts 3 is rotatably installed on the screening box 1 and is fixedly connected to the driving end of the screening motor 9; the screening motor 9 can use a unidirectional rotating motor or a bidirectional rotating servo motor, which can be selected according to needs; the transmission structure 7 is a prior art, such as a chain transmission structure or a belt transmission structure.

[0042] A protective cover 8 is fixedly installed on the outside of the screening box 1, and the side where the protective cover 8 is connected to the screening box 1 is opened, and one end of the rotating shaft 3 rotates through the screening box 1 and is rotatably installed on the protective cover 8, and the transmission structure 7 is located in the protective cover 8, and one end of one of the rotating shafts 3 is fixedly connected to the driving end of the screening motor 9; by arranging the transmission structure 7 on the outside of the screening box 1, it is possible to avoid contact between the transmission structure 7 and the grains. At this time, the transmission structure 7 can be protected by the setting of the protective cover 8 to avoid it being directly exposed to the outside; at the same time, due to the setting of the protective cover 8, it is not easy to directly collect the grains on the corresponding grading arc plate 2 by hand after the door body is opened. With the help of an external straw, the straw can be held in hand and the suction force of the straw can be used to extract the grains.

[0043] Reference Figure 1-Figure 9 , the screening box 1 is provided with multiple groups of screening auxiliary components, and the screening auxiliary components are located between the corresponding two grading arc plates 2; the screening auxiliary components include a bar magnet 11, a limit assembly, a mounting rod frame 14, an impact roller 15, and a bar magnet 2 16. A bar magnet 11 is fixedly installed on each of the screening plates 1 5 and 6, and the outer arc of the bar magnet 11 is the same as that of the screening plates 1 5 and 6. Multiple mounting rod frames 14 are installed in the screening box 1 through multiple groups of limit assemblies, and each mounting rod frame 14 is installed. An impact roller 15 and a strip magnetic block 16 are fixedly installed on the mounting rod frame 14; the mounting rod frame 14 is composed of two cross bars and two vertical blocks, and the vertical block is fixed between the two cross bars, the length of the upper cross bar is greater than the length of the lower cross bar, the upper cross bar is installed on the limiting assembly, and the lower cross bar is fixedly connected to the strip magnetic block 16; the impact roller 15 contacts the corresponding grading arc plate 2 during the upward movement and collides with it, and the collision is used to remove the miscellaneous grains stuck on the mesh of the corresponding grading arc plate 2.

[0044] The limiting assembly includes a strip slide 12 and a limiting slider 13. A plurality of strip slides 12 are provided on the inner walls of both sides of the screening box 1. A limiting slider 13 is slidably installed in each strip slide 12, and the two ends of the mounting rod frame 14 are fixedly installed on the corresponding two limiting sliders 13 respectively; the setting of the limiting assembly limits the movement of the mounting rod frame 14, so that it can only move in the strip slide 12; at the same time, an elastic sheet and two baffles 17 are fixedly installed on each impact roller 15, and the impact roller 15 is located between the corresponding two baffles 17. The setting of the elastic sheet can prevent the impact roller 15 from directly contacting the grading arc plate 2. The elasticity of the elastic sheet can make the collision between the two have a certain flexibility, thereby improving the protection of each other; the setting of the baffle 17 has a certain protective effect on the strip magnetic block 16. When the grains are unloaded, they will directly slide along the inclined surface of the baffle 17 and will not fall on the strip magnetic block 16. This can be seen from the attached manual Figure 6 It can be seen in.

[0045] When the bar magnet 11 arranged on the sub-screening plate 1 5 and the sub-screening plate 2 6 is in the highest position, both of them can have a repulsive effect on the bar magnet 2 16, but at this time, the resetting of the sub-screening auxiliary component utilizes the gravity of the part of the structure itself; or when the bar magnet 11 arranged on the sub-screening plate 1 5 and the sub-screening plate 2 6 is in the highest position, one has a repulsive effect on the bar magnet 2 16, and the other has an attractive effect; as shown in the figure, when the bar magnet 11 on the sub-screening plate 1 5 is in the highest position, it has an attractive effect on the bar magnet 2 16, and when the bar magnet 11 on the sub-screening plate 2 6 is in the highest position, it has a repulsive effect on the bar magnet 2 16.

[0046] Reference Figure 1-Figure 9 A connecting seat 22 is fixedly installed on the outside of the screening box 1, and the connecting seat 22 is hollow. Specifically, a plurality of fixing blocks 33 are fixedly installed between the screening box 1 and the connecting seat 22. The fixing blocks 33 are used to ensure that there is a distance between the connecting seat 22 and the screening box 1, which is convenient for the arrangement of the corresponding structure; an air pump 23 is fixedly connected to the connecting seat 22, a swinging screening component and a wind screen component are installed between the screening box 1 and the connecting seat 22, and a feeding component that cooperates with the wind screen component is installed on the screening box 1.

[0047] The swing screening component includes an annular groove 18, an annular seat 19, a rotating ring 20, an air pipe 21, and a driving swing assembly. A plurality of annular grooves 18 are provided on the side of the screening box 1 away from the screening motor 9, and the number of the annular grooves 18 is one more than the number of the circular grooves 10. An annular seat 19 is fixedly installed on each annular groove 18, and the annular seat 19 is hollow. A connecting pipe rack is fixedly installed between the connecting seat 22 and the plurality of annular seats 19. The connecting pipe rack includes a horizontal pipe, a vertical pipe and a plurality of screening pipes 31. A horizontal pipe is fixedly connected to the side of the connecting seat 22 away from the air pump 23. The horizontal pipe One end of the cross pipe is fixedly connected with a vertical pipe, both ends of the vertical pipe are sealed, a plurality of screening pipes 31 are fixedly connected to the vertical pipe, and one end of the screening pipe 31 passes through the screening box 1 and is connected to the corresponding annular seat 19, a valve 32 is installed on the horizontal pipe, each annular seat 19 is sealed and rotatably connected with a rotating ring 20, each rotating ring 20 is fixedly connected with a plurality of air pipes 21, the air pipe 21 is composed of a circular pipe and a one-way air pipe, and the one-way air pipes are fixedly connected to the corresponding air pipe 21 at equal intervals, and one end of the air pipe 21 is sealed, and the other end is fixedly connected to the corresponding rotating ring 20.

[0048] The driving swing assembly includes an arc-shaped rack 24, a gear 25, a toothed plate 26, a horizontal plate, and an electric telescopic rod. An arc-shaped rack 24 is fixedly installed on each rotating ring 20, and a gear 25 meshing with the arc-shaped rack 24 is rotatably installed on the screening box 1. A plurality of toothed plates 26 are slidably installed through the screening box 1, and the toothed plates 26 mesh with the corresponding gears 25;

[0049] One ends of multiple tooth plates 26 all pass through the screening box 1 and are fixedly installed with a cross plate, and an electric telescopic rod matching the cross plate is installed on the screening box 1; other structures can also be used to control the reciprocating movement of the tooth plate 26 by using the existing screening motor 9 as a power source, such as rotatably setting multiple reciprocating screws on the outer side of the screening box 1, and threadedly installing ball nuts on the reciprocating screws. The ball nuts cooperate with the corresponding tooth plates 26, and the rotation of the reciprocating screws drives the ball nuts to reciprocate, and the reciprocating movement of the ball nuts drives the tooth plates 26 to reciprocate.

[0050] The material discharge component includes a gathering plate 27, a material discharge pipe 28, and an inclined plate 29. The gathering plate 27 is fixedly installed in the screening box 1, and the gathering plate 27 is located below the lowest grading arc plate 2. The gathering plate 27 is fixedly connected with the material discharge pipe 28, and the inclined plate 29 is fixedly installed in the screening box 1; the wind screen component includes a second screening pipe 30 and a valve 32. The second screening pipe 30 is fixedly connected to the horizontal pipe, and the lower end of the second screening pipe 30 is located in the screening box 1 and cooperates with the material discharge pipe 28. The valve 32 is also installed on the material discharge pipe 28 and the second screening pipe 30; the material discharge component and the wind screen component cooperate with each other and are used at the same time, and the use of the wind screen component can be used simultaneously with the swinging screening component, and can also be used intermittently with it. For example, when the swinging screening component is used, the wind screen component is not used.

[0051] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0052] In the present invention, after the grains are poured into the screening box 1 from the top, in the initial state, the sub-screening plate 1 5 and the sub-screening plate 2 6 are in left-right symmetrical positions, and the grains can be better dropped downward through the gap between the two. At the same time, the grains can be poured in small amounts for multiple times or continuously, so that a lot of grains are not piled up on the top grading arc plate 2 at the same time; the screening motor 9 and the air pump 23 are turned on, and the screening motor 9 works by using a plurality of rotating shafts 3 in cooperation with the transmission structure 7 to rotate, and the rotating shafts 3 rotate and drive the sub-screening plates through the inclined rods 4 The first 5 and the second sieve plate 6 rotate, thereby lifting the grains intercepted on the corresponding grading arc plate 2, so that the grains can better pass through the corresponding grading arc plate 2; and during the rotation of the first 5 and the second sieve plate 6, the bar magnetic block 11 cooperates with the bar magnetic block 2 16, so that the bar magnetic block 2 16 can produce reciprocating motion in the vertical direction. When the bar magnetic block 2 16 moves upward, it can drive the impact roller 15 to move upward. The impact force generated by the rapid upward movement of the impact roller 15 on the grading arc plate 2 can quickly play an anti-blocking effect;

[0053] When the air pump 23 is working, the airflow generated will be ejected through the air pipe 21, and the electric telescopic rod will be turned on at the same time. The operation of the electric telescopic rod will drive the tooth plate 26 to move back and forth. The reciprocating movement of 26 drives the arc-shaped rack 24 to swing back and forth through the gear 25. The reciprocating swing of the arc-shaped rack 24 can make the air pipe 21 swing back and forth, thereby improving the clearing effect of the air pipe 21. At the same time, for the unblocked part, the airflow can directly break through the mesh on the corresponding grading arc plate 2, directly exert a certain impact on the grains, improve the effect of motion dispersion, and facilitate better material dropping;

[0054] The grains with holes and those with a small volume will be collected on the gathering plate 27, and then fall downward through the discharge pipe 28 (the gathering plate 27 can be set to be a funnel shape, or a movable structure for pushing the grains can be installed thereon, and the funnel shape is preferred); at this time, the airflow blown out by the screening pipe 2 30 can directly screen the fallen grains. For the same volume, the weight of the grains with holes will be less than that of the small-volume grains without holes, thereby achieving a certain screening effect.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for grading and screening grains to remove cracks, comprising a screening box (1) fixedly connected to a feed pipe and a discharge pipe, characterized in that: The screening box (1) is fixedly provided with a plurality of grading arc plates (2) from top to bottom, and the mesh apertures of the grading arc plates (2) are gradually changed; A plurality of first screening plates (5) and second screening plates (6) are rotatably mounted in the screening box (1), and the first screening plates (5) and second screening plates (6) are used in a one-to-one correspondence, and a driving screening component is installed between the screening box (1) and the plurality of first screening plates (5) and second screening plates (6); The screening box (1) is provided with a plurality of groups of screening auxiliary components, and the screening auxiliary components are located between two corresponding grading arc plates (2); A connecting seat (22) is fixedly mounted on the outside of the screening box (1), and the connecting seat (22) is hollow. An air pump (23) is fixedly connected to the connecting seat (22). A swing screening component and an air screen component are mounted between the screening box (1) and the connecting seat (22), and a material discharge component that matches the air screen component is mounted on the screening box (1); The screening auxiliary component comprises a strip magnet block 1 (11), a limit assembly, a mounting rod frame (14), an impact roller (15), and a strip magnet block 2 (16); a strip magnet block 1 (11) is fixedly mounted on each of the screening plates 1 (5) and 2 (6); and the outer arc of the strip magnet block 1 (11) is the same as that of the screening plates 1 (5) and 2 (6); a plurality of mounting rod frames (14) are mounted in the screening box (1) via a plurality of sets of limit assemblies; and a impact roller (15) and a strip magnet block 2 (16) are fixedly mounted on each of the mounting rod frames (14); The mounting rod frame (14) is composed of two cross bars and two vertical blocks, and the vertical block is fixed between the two cross bars, the length of the upper cross bar is greater than the length of the lower cross bar, the upper cross bar is installed on the limit assembly, and the lower cross bar is fixedly connected to the second bar magnet block (16); The limiting assembly comprises a strip-shaped slide groove (12) and a limiting slider (13); the inner walls on both sides of the screening box (1) are provided with a plurality of strip-shaped slide grooves (12); a limiting slider (13) is slidably mounted in each of the strip-shaped slide grooves (12); and the two ends of the mounting rod frame (14) are respectively fixedly mounted on the corresponding two limiting sliders (13); An elastic sheet and two baffles (17) are fixedly mounted on each of the impact rollers (15), and the impact roller (15) is located between the two corresponding baffles (17).

2. The device for classifying, screening and removing cracks of grains according to claim 1, characterized in that: A plurality of inclined rods (4) are fixedly mounted on both ends of the first and second sub-screen plates (5) and a plurality of circular grooves (10) are provided on the inner walls of both sides of the screening box (1), and the inclined rods (4) are located in the corresponding circular grooves (10).

3. The device for classifying, screening and removing cracks of grains according to claim 2, characterized in that: The driving screening component comprises a rotating shaft (3), a transmission structure (7), and a screening motor (9); a rotating shaft (3) is rotatably mounted on each of the plurality of circular grooves (10) on the same side, and the inclined rod (4) is fixedly arranged on the corresponding rotating shaft (3); the plurality of rotating shafts (3) are commonly mounted with the transmission structure (7); a screening motor (9) is fixedly mounted on the outside of the screening box (1), and one end of one of the rotating shafts (3) is rotatably mounted on the screening box (1) and is fixedly connected to the driving end of the screening motor (9); A protective cover (8) is fixedly mounted on the outside of the screening box (1), and a side of the protective cover (8) connected to the screening box (1) is open, and one end of the rotating shaft (3) rotates through the screening box (1) and is rotatably mounted on the protective cover (8), and the transmission structure (7) is located inside the protective cover (8), and one end of one of the rotating shafts (3) is fixedly connected to the driving end of the screening motor (9).

4. The device for classifying, screening and removing cracks of grains according to claim 3, characterized in that: The swing screening component comprises an annular groove (18), an annular seat (19), a rotating ring (20), an air pipe (21), and a driving swing assembly. A plurality of annular grooves (18) are provided on a side of the screening box (1) away from the screening motor (9), and the number of the annular grooves (18) is one more than the number of the circular grooves (10). An annular seat (19) is fixedly mounted on each of the annular grooves (18), and the annular seat (19) is hollow. A connecting pipe rack is fixedly mounted between the connecting seat (22) and the plurality of annular seats (19). Each of the annular seats (19) is sealed and rotatably connected to a rotating ring (20), and each of the rotating rings (20) is fixedly connected to a plurality of air pipes (21). The connecting pipe rack comprises a horizontal pipe, a vertical pipe and a plurality of screening pipes (31); a side of the connecting seat (22) away from the air pump (23) is fixedly connected with a horizontal pipe; one end of the horizontal pipe is fixedly connected with a vertical pipe; both ends of the vertical pipe are sealed; a plurality of screening pipes (31) are fixedly connected to the vertical pipe; one end of the screening pipe (31) passes through the screening box (1) and is connected to the corresponding annular seat (19); a valve (32) is installed on the horizontal pipe; The air pipe (21) is composed of a circular pipe and a one-way air pipe, and the one-way air pipe is fixedly connected to the corresponding air pipe (21) at equal intervals, and one end of the air pipe (21) is sealed, and the other end is fixedly connected to the corresponding rotating ring (20); A plurality of fixing blocks (33) are fixedly mounted between the screening box (1) and the connecting seat (22).

5. The device for classifying, screening and removing cracks of grains according to claim 4, characterized in that: The driving swing assembly comprises an arc-shaped rack (24), a gear (25), a toothed plate (26), a horizontal plate, and an electric telescopic rod. An arc-shaped rack (24) is fixedly mounted on each of the rotating rings (20). A gear (25) meshing with the arc-shaped rack (24) is rotatably mounted on the screening box (1). A plurality of toothed plates (26) are slidably mounted through the screening box (1), and the toothed plates (26) mesh with corresponding gears (25). One end of each of the plurality of tooth plates (26) passes through the screening box (1) and is fixedly mounted with a transverse plate, and an electric telescopic rod matching the transverse plate is mounted on the screening box (1).

6. The device for classifying, screening and removing cracks of grains according to claim 5, characterized in that: The material discharge component comprises a gathering plate (27), a material discharge pipe (28), and an inclined plate (29); the gathering plate (27) is fixedly installed in the screening box (1), and the gathering plate (27) is located below the lowest grading arc plate (2); the gathering plate (27) is fixedly connected to the material discharge pipe (28); and the inclined plate (29) is fixedly installed in the screening box (1).

7. The device for classifying, screening and removing cracks of grains according to claim 6, characterized in that: The wind screen component comprises a second screening pipe (30) and a valve (32). The second screening pipe (30) is fixedly connected to the horizontal pipe, and the lower end of the second screening pipe (30) is located in the screening box (1) and matched with the feed pipe (28). The feed pipe (28) and the second screening pipe (30) are also equipped with valves (32).

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