Grinding device and method for deep processing of grains

Abstract

The invention discloses a grinding device and method for grain deep processing, and belongs to the technical field of grain deep processing. The grinding device comprises a base, a feeding assembly, a driving assembly, a grinding assembly and a discharging assembly; the feeding assembly comprises a filter screen drum and an auger, the driving assembly is used for driving the auger to rotate, and a plurality of screen hole areas are sequentially arranged on the peripheral surface of the filter screen drum in the axial direction of the filter screen drum; the grinding assembly comprises an outer barrel, an inner grinding barrel, a grinding frame, a grinding mechanism and a plurality of grinding roller sets, the grinding frame comprises a left fixing plate, a bearing frame and a right fixing plate, the left fixing plate and the right fixing plate are both fixedly connected with the outer barrel, the multiple grinding roller sets correspond to the multiple screening hole areas respectively, each grinding roller set comprises a plurality of main grinding rollers, and the bearing frame is fixedly connected with the outer barrel. The grinding mechanism is used for driving the inner grinding cylinder and the main grinding roller to rotate; and a feeding cavity, a first grinding cavity and a discharging cavity are formed in the bearing frame, and the main grinding roller is arranged in the first grinding cavity, so that the grinding efficiency and the grinding effect of the device can be improved.

Description

Technical Field

[0001] This invention belongs to the field of grain deep processing technology, and specifically relates to a grinding device and method for grain deep processing. Background Technology

[0002] Grain deep processing and grinding is a key process that transforms grain raw materials into fine powder or granular products, and it is widely used in food, feed, and industrial fields. Currently, common whole grain health powders on the market need to be made into powdered food through grinding equipment. Because they are not puffed and do not contain instant solvents or preservatives, they can retain the nutritional components of the raw materials to the greatest extent and have a variety of effects and ways of consumption.

[0003] Traditional grain grinding equipment includes a processing chamber containing a grinding assembly. This assembly comprises a drive mechanism and two grinding rollers. The drive mechanism rotates the rollers, which have a grinding gap between them. Grain is fed between the rollers for grinding. This structure allows for grinding of the grain using two grinding rollers. However, traditional grinding equipment lacks grain screening and separates grains of different sizes, resulting in poor grinding efficiency and effectiveness. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a grinding apparatus and method for deep processing of grains. The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, the present invention provides a grinding device for deep processing of grains, comprising a base, a feeding assembly, a driving assembly, a grinding assembly, and a discharging assembly; The feeding assembly includes a filter screen cylinder and an auger. The auger is fitted inside the filter screen cylinder. The driving assembly is used to drive the auger to rotate. Multiple screen hole areas are arranged sequentially along the axial direction on the outer circumferential surface of the filter screen cylinder. The aperture of the screen holes in the multiple screen hole areas increases sequentially. The grinding assembly includes an outer cylinder, an inner grinding cylinder, a grinding frame, a grinding mechanism, and multiple sets of grinding rollers. The outer cylinder is fixed to the base, the inner grinding cylinder is rotatably connected to the outer cylinder, and the grinding frame is set inside the inner grinding cylinder. The grinding frame includes a left fixed plate, a support frame, and a right fixed plate. Both the left and right fixed plates are fixedly connected to the outer cylinder. The multiple sets of grinding rollers correspond to multiple sieve hole areas, and each set of grinding rollers includes multiple main grinding rollers. The grinding mechanism is used to drive the inner grinding cylinder and the main grinding rollers to rotate. The support frame has an internal feeding chamber, a first abrasive chamber and a discharge chamber. A second abrasive chamber is formed between the support frame and the inner grinding cylinder. The filter screen cylinder is set in the feeding chamber, and the main grinding roller is set in the first abrasive chamber. The feeding chamber, the first abrasive chamber and the second abrasive chamber are connected in sequence. The discharge chamber and the second abrasive chamber are connected. The discharge assembly is set in the discharge chamber.

[0005] In one embodiment of the present invention, the support frame includes a frame body and an arc-shaped plate. The frame body is provided with a feeding chamber and a first abrasive chamber. The arc-shaped plate is convex outward toward the frame body and is fixedly connected to the frame body. The discharge chamber is located between the arc-shaped plate and the frame body. The arc-shaped plate is provided with discharge filter holes. The grinding assembly also includes multiple auxiliary grinding rollers, which are disposed between the arc plate and the inner grinding cylinder. There is a grinding gap between the auxiliary grinding rollers and the inner wall of the inner grinding cylinder, and the grinding gap between the multiple auxiliary grinding rollers and the inner wall of the inner grinding cylinder gradually decreases. Multiple main grinding rollers and multiple auxiliary grinding rollers are staggered along the circumference of the inner grinding cylinder. Both sides of the auxiliary grinding rollers are equipped with feeding rollers. The grinding mechanism is used to drive the auxiliary grinding rollers and feeding rollers to rotate.

[0006] In one embodiment of the present invention, the grinding mechanism includes a first motor, a first drive gear, a second drive gear, a first gear ring, a second gear ring, a first driven gear, a second driven gear, and a third driven gear; Both the first drive gear and the second drive gear are connected to the first motor. The first gear ring includes a first internal gear ring and a first external gear ring. The first drive gear meshes with the first internal gear ring. Both the first driven gear and the second driven gear mesh with the first external gear ring. The first driven gear is coaxially connected to the main grinding roller, and the second driven gear is coaxially connected to the auxiliary grinding roller. The second gear ring includes a second internal gear ring and a second external gear ring. A third gear ring is provided on the inner wall of the inner grinding cylinder. The third driven gear meshes with the second internal gear ring, and the third gear ring meshes with the second external gear ring. The third driven gear and the feeding roller are coaxially connected.

[0007] In one embodiment of the present invention, the grinding mechanism further includes a driving wheel, a first driven wheel, a second driven wheel, a third driven wheel, and a fourth driven wheel. A first motor is connected to the driving wheel. The first and second driven wheels are both engaged with the driving wheel. The third driven wheel is engaged with the first driven wheel. The fourth driven wheel is engaged with the second driven wheel. The third driven gear is coaxially connected to the first driving gear, and the fourth driven gear is coaxially connected to the second driving gear.

[0008] In one embodiment of the present invention, the discharge assembly includes a screw and a scraper. The scraper is disposed in the discharge chamber and is sleeved on the screw with the two being threaded together. The two ends of the screw are rotatably connected to the left fixed plate and the right fixed plate, respectively. A fourth driven gear is fixed at one end of the screw and meshes with the first internal gear ring. The base is equipped with a material collection box. The two ends of the discharge chamber pass through the left and right fixed plates respectively. The outer surfaces of the left and right fixed plates are equipped with guide pipes. One end of the guide pipe is connected to the discharge chamber, and the other end is connected to the material collection box.

[0009] In one embodiment of the present invention, both ends of the inner grinding cylinder are provided with multiple discharge holes, which are arranged sequentially along the circumference of the inner grinding cylinder. One end of the guide pipe is connected to the discharge chamber, and the other end faces the discharge hole. The material collection box is equipped with a material collection trough, and the inner wall of the outer cylinder is provided with an elongated hole extending along its axis. There is a discharge cavity between the outer wall of the inner grinding cylinder and the inner wall of the outer cylinder. The discharge hole and the discharge cavity are connected, and the material collection trough is connected to the discharge cavity through the elongated hole. Spiral blades are provided on the outer circumferential surface of the inner grinding cylinder.

[0010] In one embodiment of the present invention, there are three sieve hole areas, which are sequentially named a first sieve hole area, a second sieve hole area, and a third sieve hole area. There are two grinding roller groups, which correspond to the second sieve hole area and the third sieve hole area, respectively. The support frame also includes a partition, which is disposed between the two sets of grinding rollers. The partition is used to separate the feed chamber, the first abrasive chamber and the second abrasive chamber corresponding to the two sets of grinding rollers. The filter screen cylinder is also fitted with a material collection cylinder, and a guide box is also provided on the base. One end of the guide box is connected to the material collection cylinder, and the other end is connected to the material collection box.

[0011] In one embodiment of the present invention, the feeding assembly further includes a feeding cone and a feeding pipe. A support is provided on the base, the feeding cone is fixed on the support, one end of the feeding pipe is connected to the feeding cone, and the other end is connected to the filter screen cylinder.

[0012] In one embodiment of the present invention, the drive assembly includes a second motor, a bearing housing, and a drive shaft. The drive shaft is connected to an auger and is mounted on the bearing housing. The second motor is mounted on the bearing housing and is connected to the drive shaft for transmission.

[0013] In a second aspect, the present invention provides a grinding method for deep processing of grains, including a grinding device for deep processing of grains as provided in the above solution. The grinding device includes a base, a feeding component, a driving component, a grinding component, and a discharging component. The feeding component includes a filter screen cylinder and an auger. The grinding component includes a grinding frame and a grinding mechanism. The grinding frame includes a support frame. The support frame has a discharge chamber inside. The discharging component is disposed in the discharge chamber. The grinding mechanism includes a first motor, a first drive gear, and a first gear ring. The first drive gear is connected to the first motor in a transmission manner, and the first gear ring includes a first internal gear ring and a first external gear ring. The discharge assembly includes a screw and a scraper. The scraper is disposed in the discharge chamber and is sleeved on the screw with the two being threaded together. A fourth driven gear is fixed at one end of the screw and meshes with the first internal gear ring. The drive assembly includes a second motor, a bearing housing, and a drive shaft. The drive shaft is connected to the auger and is mounted on the bearing housing. The second motor is mounted on the bearing housing and is connected to the drive shaft for transmission. The methods include: The first motor is controlled to rotate forward, which drives the screw to rotate through the first drive gear and the first gear ring. When the screw rotates, it drives the scraper to slide along the first direction. The first motor is controlled to reverse, which drives the screw to rotate through the first drive gear and the first gear ring. When the screw rotates, it drives the scraper to slide in the second direction, and the first direction and the second direction are opposite. According to the first preset time, the first motor is controlled to periodically switch between forward and reverse rotation in order to control the scraper to reciprocate and scrape the grain. The second motor is controlled to rotate forward, which drives the auger to rotate clockwise via the transmission shaft. When the auger rotates, it drives the grain to be conveyed in a third direction. The second motor is controlled to reverse, which drives the auger to rotate counterclockwise through the transmission shaft. When the auger rotates, it drives the grain to be conveyed along the fourth direction, which is opposite to the fourth direction. According to the second preset time, the second motor is controlled to periodically switch between forward and reverse rotation to drive the grains in the filter cylinder to reciprocate for screening.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: In the above-mentioned scheme of this application, the grinding device includes a base, a feeding assembly, a driving assembly, a grinding assembly, and a discharging assembly; the feeding assembly includes a filter screen cylinder and an auger, the auger being sleeved inside the filter screen cylinder, the driving assembly being used to drive the auger to rotate, and multiple screen hole areas are sequentially provided along its axial direction on the outer circumferential surface of the filter screen cylinder, the aperture of the screen holes in the multiple screen hole areas increasing sequentially; the grinding assembly includes an outer cylinder, an inner grinding cylinder, a grinding frame, a grinding mechanism, and multiple sets of grinding rollers, the outer cylinder being fixed on the base, the inner grinding cylinder being rotatably connected to the outer cylinder, the grinding frame being disposed inside the inner grinding cylinder, and the grinding frame including a left fixed plate, The support frame and right fixed plate, left fixed plate and right fixed plate are all fixedly connected to the outer cylinder. Multiple sets of grinding rollers correspond to multiple sieve hole areas. Each set of grinding rollers includes multiple main grinding rollers. The grinding mechanism is used to drive the inner grinding cylinder and main grinding rollers to rotate. The support frame has a feeding chamber, a first grinding chamber and a discharging chamber inside. A second grinding chamber is formed between the support frame and the inner grinding cylinder. The filter screen cylinder is set in the feeding chamber, and the main grinding rollers are set in the first grinding chamber. The feeding chamber, the first grinding chamber and the second grinding chamber are connected in sequence. The discharging chamber and the second grinding chamber are connected. The discharge assembly is set in the discharging chamber. With this structure, firstly, when the auger drives the grain to be transported in the filter screen cylinder, the grain can be transported through the sieve hole area on the filter screen cylinder to the feeding chamber of the support frame, and then transported through the feeding chamber to the first grinding chamber, where it is ground under the action of the grinding rollers. The ground grain is then transported through the second grinding chamber to the discharging chamber and discharged to the outside of the device through the discharge assembly, thereby realizing the grinding treatment of the grain. Secondly, the outer circumferential surface of the filter screen cylinder in this application is provided with multiple screen hole areas, and multiple sets of grinding rollers correspond to the multiple screen hole areas respectively. In this way, grains of different particle sizes can be screened through multiple screen hole areas, and the screened grains can enter different grinding roller sets for grinding, thereby enabling separate grinding of grains of different particle sizes, improving the grinding efficiency and grinding effect of the device.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the grinding device in an embodiment of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the grinding device in an embodiment of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the filter screen cylinder and the auger in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the grinding device in an embodiment of the present invention; Figure 5 This is a front view of the grinding device in an embodiment of the present invention; Figure 6 This is a schematic diagram of the grinding assembly in an embodiment of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the grinding assembly and the base in an embodiment of the present invention; Figure 8 This is a schematic diagram of the grinding assembly in an embodiment of the present invention. Figure 2 ; Figure 9 yes Figure 8 An enlarged view at point A; Figure 10 This is a schematic diagram of the grinding assembly in an embodiment of the present invention. Figure 3 ; Figure 11 This is a schematic diagram of the transmission component in an embodiment of the present invention.

[0017] Figure label: 1-Base, 2-Feeding assembly, 21-Filter screen cylinder, 211-First screen area, 212-Second screen area, 213-Third screen area, 22-Auger, 23-Feeding cone, 24-Feeding pipe, 3-Drive assembly, 31-Second motor, 32-Bearing seat, 33-Drive shaft; 4-Grinding assembly, 41-Outer cylinder, 42-Inner grinding cylinder, 43-Grinding frame, 431-Left fixed plate, 432-Support frame, 4321-Feed chamber, 4322-First abrasive chamber, 4323-Discharge chamber, 4324-Second abrasive chamber, 4325-Arc plate, 4326-Partition plate, 433-Right fixed plate, 44-Grinding mechanism, 441-First motor, 442-First drive gear, 443- Second drive gear, 444-first gear ring, 445-second gear ring, 446-first driven gear, 447-second driven gear, 448-third driven gear, 449-transmission assembly, 4491-drive wheel, 4492-first driven wheel, 4493-second driven wheel, 4494-third driven wheel, 4495-fourth driven wheel, 45-grinding roller assembly, 451-main grinding roller, 46-auxiliary grinding roller; 5-Discharge assembly, 6-Pushing roller, 7-Collection box, 8-Guide box. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0019] Example 1: Please see Figures 1 to 11This invention provides a grinding device for deep processing of grains, including a base 1, a feeding assembly 2, a driving assembly 3, a grinding assembly 4, and a discharging assembly 5. The feeding assembly 2 includes a filter screen cylinder 21 and an auger 22, with the auger 22 sleeved inside the filter screen cylinder 21. The driving assembly 3 drives the auger 22 to rotate. Multiple screen hole areas are sequentially arranged along the axial direction on the outer circumferential surface of the filter screen cylinder 21, with the aperture of the screen holes in the multiple screen hole areas increasing sequentially. The grinding assembly 4 includes an outer cylinder 41, an inner grinding cylinder 42, a grinding frame 43, a grinding mechanism 44, and multiple sets of grinding rollers 45. The outer cylinder 41 is fixed to the base 1, the inner grinding cylinder 42 is rotatably connected to the outer cylinder 41, and the grinding frame 43 is disposed inside the inner grinding cylinder 42. The grinding frame 43 includes a left fixing plate 431, a support frame 432, and a right fixing plate 433. The fixed plate 431 and the right fixed plate 433 are both fixedly connected to the outer cylinder 41. Multiple sets of grinding roller groups 45 correspond to multiple sieve hole areas respectively. Each set of grinding roller groups 45 includes multiple main grinding rollers 451. The grinding mechanism 44 is used to drive the inner grinding cylinder 42 and the main grinding rollers 451 to rotate. The inside of the support frame 432 is provided with a feeding chamber 4321, a first grinding chamber 4322 and a discharging chamber 4323. A second grinding chamber 4324 is formed between the support frame 432 and the inner grinding cylinder 42. The filter screen cylinder 21 is set in the feeding chamber 4321. The main grinding rollers 451 are set in the first grinding chamber 4322. The feeding chamber 4321, the first grinding chamber 4322 and the second grinding chamber 4324 are connected in sequence. The discharging chamber 4323 and the second grinding chamber 4324 are connected. The discharge assembly 5 is set in the discharging chamber 4323.

[0020] In some embodiments of this application, the base 1 includes a support platform, which consists of a rectangular frame and multiple connecting rods. The multiple connecting rods are parallel to each other, and the two ends of the connecting rods are welded to the inside of the rectangular frame. The feeding assembly 2, the driving assembly 3, and the grinding assembly 4 are all mounted on the support platform.

[0021] In some embodiments of this application, the auger 22 includes a rotating shaft and helical blades. The rotating shaft and the drive assembly 3 are connected in a transmission manner. The helical blades are located on the outer circumferential surface of the rotating shaft. When the drive assembly 3 drives the rotating shaft to rotate, the helical blades transport the grain to the filter screen cylinder 21.

[0022] In some embodiments of this application, the sieve area includes a plurality of sieve holes distributed along the axial direction of the filter screen cylinder 21 and a plurality of sieve holes distributed along the circumference of the filter screen cylinder 21. When the auger 22 drives the grain to be conveyed along the axial direction of the filter screen cylinder 21, the grain can flow into the feed chamber 4321 through the sieve holes.

[0023] In some embodiments of this application, the feeding assembly 2 further includes a feeding bin through which grains are conveyed to the auger 22. Among the multiple screen hole areas on the outer peripheral surface of the filter screen cylinder 21, the aperture of the screen holes in the screen hole area closer to the feeding bin is smaller than the aperture of the screen holes in the screen hole area farther from the feeding bin.

[0024] In some embodiments of this application, the outer cylinder 41 includes a front cover, a cylinder body, and a rear cover. The front cover and the rear cover are respectively connected to both ends of the cylinder body. The front cover and the cylinder body are connected by bolts, and the rear cover and the cylinder body are connected by bolts.

[0025] In some embodiments of this application, a first annular convex plate is provided on the side of the front cover facing the cylinder, and a second annular convex plate is provided on the side of the rear cover facing the cylinder. The two ends of the inner grinding cylinder 42 are respectively sleeved on the outside of the first annular convex plate and the second annular convex plate. A first bearing is provided between the inner grinding cylinder 42 and the first annular convex plate, and a second bearing is provided between the inner grinding cylinder 42 and the second annular convex plate, so that the inner grinding cylinder 42 can rotate relative to the cylinder.

[0026] In some embodiments of this application, the left fixing plate 431 is fixedly connected to the front cover, the right fixing plate 433 is fixedly connected to the rear cover, and the two ends of the support frame 432 are welded to the left fixing plate 431 and the right fixing plate 433 respectively.

[0027] In some embodiments of this application, there is a gap between the outer peripheral surface of the inner grinding cylinder 42 and the inner wall of the cylinder body, so that the inner grinding cylinder 42 can rotate normally.

[0028] In some embodiments of this application, multiple sets of grinding rollers 45 are arranged on the support frame 432, and the multiple sets of grinding rollers 45 are arranged sequentially along the axial direction of the filter screen cylinder 21. Each set of grinding rollers 45 corresponds to a screen hole area, so that the multiple sets of grinding rollers 45 can grind grains of different particle sizes respectively.

[0029] In some embodiments of this application, the main grinding rollers 451 in the multiple grinding roller groups 45 have different diameters, and the diameter of the main grinding roller 451 closer to the feed hopper is smaller than the diameter of the main grinding roller 451 farther from the feed hopper. This allows adjustment of the gap between the main grinding roller 451 and the first abrasive chamber 4322 to accommodate grinding grains of different particle sizes. Simultaneously, the main grinding rollers 451 in the multiple grinding roller groups 45 can be coaxially connected, enabling the grinding mechanism 44 to simultaneously drive the main grinding rollers 451 in the multiple grinding roller groups 45 to rotate.

[0030] In some embodiments of this application, the support frame 432 includes a central sleeve, three conical guide plates and three grinding sleeves. The central sleeve is sleeved on the outside of the filter screen cylinder 21. The three conical guide plates are arranged sequentially along the circumference of the central sleeve, and one end of each of the three conical guide plates is connected to the central sleeve, and the other end is connected to the three grinding sleeves respectively. There are three main grinding rollers 451, and the three main grinding rollers 451 are respectively sleeved in the three grinding sleeves.

[0031] In some embodiments of this application, a feeding chamber 4321 is formed between the inner wall of the central sleeve and the outer wall of the filter screen cylinder 21, a first abrasive chamber 4322 is located inside the grinding sleeve, and a second abrasive chamber 4324 is formed between the inner circumferential surface of the inner grinding cylinder 42 and the outer circumferential surface of the support frame 432.

[0032] In some embodiments of this application, grains from multiple locations within the central sleeve can be guided to three grinding sleeves via three conical guide plates. The three grinding sleeves can then grind the grains guided by the three conical guide plates, thereby improving grinding efficiency.

[0033] In the above-mentioned scheme of this application, the grinding device includes a base 1, a feeding assembly 2, a driving assembly 3, a grinding assembly 4, and a discharging assembly 5; the feeding assembly 2 includes a filter screen cylinder 21 and an auger 22, the auger 22 is sleeved inside the filter screen cylinder 21, the driving assembly 3 is used to drive the auger 22 to rotate, and multiple screen hole areas are sequentially provided along its axial direction on the outer circumferential surface of the filter screen cylinder 21, the aperture of the screen holes in the multiple screen hole areas increases sequentially; the grinding assembly 4 includes an outer cylinder 41, an inner grinding cylinder 42, a grinding frame 43, a grinding mechanism 44, and multiple sets of grinding rollers 45, the outer cylinder 41 is fixed on the base 1, the inner grinding cylinder 42 is rotatably connected to the outer cylinder 41, the grinding frame 43 is disposed inside the inner grinding cylinder 42, the grinding frame 43 includes a left fixing plate 431, a support frame 432, and a right fixing plate 433, the left fixing plate 431 Both the right fixed plate 433 and the outer cylinder 41 are fixedly connected. Multiple sets of grinding roller groups 45 correspond to multiple screen hole areas respectively. Each set of grinding roller groups 45 includes multiple main grinding rollers 451. The grinding mechanism 44 is used to drive the inner grinding cylinder 42 and the main grinding rollers 451 to rotate. The inside of the support frame 432 is provided with a feeding chamber 4321, a first grinding chamber 4322 and a discharge chamber 4323. A second grinding chamber 4324 is formed between the support frame 432 and the inner grinding cylinder 42. The filter screen cylinder 21 is set in the feeding chamber 4321. The main grinding rollers 451 are set in the first grinding chamber 4322. The feeding chamber 4321, the first grinding chamber 4322 and the second grinding chamber 4324 are connected in sequence. The discharge chamber 4323 and the second grinding chamber 4324 are connected. The discharge assembly 5 is set in the discharge chamber 4323. With this structure, firstly, when the auger 22 carries the grain inside the filter screen cylinder 21, the grain can be conveyed through the screen holes on the filter screen cylinder 21 to the feed chamber 4321 of the support frame 432, and then conveyed through the feed chamber 4321 to the first grinding chamber 4322, where it is ground under the action of the grinding rollers. The ground grain is then conveyed through the second grinding chamber 4324 to the discharge chamber 4323, and discharged to the outside of the device through the discharge assembly 5, thereby realizing the grinding process of the grain. Secondly, in this application, the outer circumferential surface of the filter screen cylinder 21 is provided with multiple screen hole areas, and multiple sets of grinding rollers 45 correspond to multiple screen hole areas respectively. In this way, grains of different particle sizes can be screened through multiple screen hole areas, and the screened grains can enter different sets of grinding rollers 45 for grinding, thereby enabling separate grinding of grains of different particle sizes, improving the grinding efficiency and grinding effect of the device.

[0034] In some embodiments of this application, such as Figure 4 and Figure 6As shown, the support frame 432 includes a frame body and an arc-shaped plate 4325. The frame body is provided with a feeding chamber 4321 and a first abrasive chamber 4322. The arc-shaped plate 4325 protrudes outward toward the frame body and is fixedly connected to the frame body. The discharge chamber 4323 is located between the arc-shaped plate 4325 and the frame body. The arc-shaped plate 4325 is provided with discharge filter holes. The grinding assembly 4 also includes multiple auxiliary grinding rollers 46. The auxiliary grinding rollers 46 are disposed between the arc-shaped plate 4325 and the inner grinding cylinder 42. There is a grinding gap between the auxiliary grinding rollers 46 and the inner wall of the inner grinding cylinder 42, and the grinding gap between the multiple auxiliary grinding rollers 46 and the inner wall of the inner grinding cylinder 42 gradually decreases. Multiple main grinding rollers 451 and multiple auxiliary grinding rollers 46 are staggered along the circumference of the inner grinding cylinder 42. Both sides of the auxiliary grinding rollers 46 are provided with feeding rollers 6. The grinding mechanism 44 is used to drive the auxiliary grinding rollers 46 and feeding rollers 6 to rotate. With this structure, firstly, the concave surface of the arc-shaped plate 4325 can support the grains, facilitating their grinding and discharge. Secondly, after the grains undergo initial grinding by the main grinding roller 451, they can be further ground by the auxiliary grinding roller 46 to improve grinding efficiency and quality. Furthermore, the feeding roller 6 can move the grains in the second grinding chamber 4324 between the auxiliary grinding roller 46 and the inner grinding cylinder 42 for secondary grinding, further improving the grinding quality. The feeding roller 6 can also move the grains in the second grinding chamber 4324 into the discharge filter holes of the arc-shaped plate 4325 to improve the efficiency of grain discharge.

[0035] In some embodiments of this application, three arc-shaped plates 4325 are provided, and three discharge cavities 4323 are formed between the three arc-shaped plates 4325 and the frame.

[0036] In some embodiments of this application, such as Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, the grinding mechanism 44 includes a first motor 441, a first drive gear 442, a second drive gear 443, a first gear ring 444, a second gear ring 445, a first driven gear 446, a second driven gear 447, and a third driven gear 448. The first drive gear 442 and the second drive gear 443 are both connected to the first motor 441. The first gear ring 444 includes a first internal gear ring and a first external gear ring. The first drive gear 442 meshes with the first internal gear ring. Both driven gear 446 and driven gear 447 mesh with the first external gear ring. The first driven gear 446 is coaxially connected to the main grinding roller 451, and the second driven gear 447 is coaxially connected to the auxiliary grinding roller 46. The second gear ring 445 includes a second internal gear ring and a second external gear ring. A third gear ring is provided on the inner wall of the inner grinding cylinder 42. The third driven gear 448 meshes with the second internal gear ring, and the third gear ring meshes with the second external gear ring. The third driven gear 448 is coaxially connected to the feeding roller 6. With this structure, when the first motor 441 drives the first drive gear 442 to rotate, the first drive gear 442 drives the first gear ring 444 to rotate. When the first gear ring 444 rotates, it drives the first driven gear 446 and the second driven gear 447 to rotate. When the first driven gear 446 rotates, it drives the main grinding roller 451 to rotate for grinding, and when the second driven gear 447 rotates, it drives the auxiliary grinding roller 46 to rotate for grinding. Furthermore, when the first motor 441 drives the second drive gear 443 to rotate, the second drive gear 443 drives the second gear ring 445 to rotate. When the second gear ring 445 rotates, it drives the third driven gear 448 and the third gear ring to rotate. When the third driven gear 448 rotates, it drives the feeding roller 6 to rotate to achieve feeding. When the third gear ring rotates, it drives the inner grinding cylinder 42 to rotate to perform grinding. In this way, the main grinding roller 451, the auxiliary grinding roller 46, the feeding roller 6, and the inner grinding cylinder 42 can rotate normally, thereby ensuring that the grinding assembly 4 can work normally.

[0037] In some embodiments of this application, the support frame 432 further includes a support plate located between the right fixed plate 433 and the front cover, and the first drive gear 442, the second drive gear 443, the first driven gear 446, the second driven gear 447 and the third driven gear 448 are all located between the support plate and the right fixed plate 433.

[0038] In some embodiments of this application, three first driven gears 446 and three second driven gears 447 are provided. The three first driven gears 446 are arranged sequentially along the circumference of the first gear ring 444, and the three second driven gears 447 are arranged sequentially along the circumference of the first gear ring 444. The first gear ring 444 can be supported by the three first driven gears 446 and the three second driven gears 447. Three third driven gears 448 are provided, and the three third driven gears 448 are arranged sequentially along the circumference of the second gear ring 445. The second gear ring 445 can be supported by the three third driven gears 448 and the third gear ring.

[0039] In some embodiments of this application, a bracket is provided on the base 1, and the first motor 441 is fixed on the bracket.

[0040] In some embodiments of this application, such as Figure 11 As shown, the grinding mechanism 44 also includes a driving wheel 4491, a first driven wheel 4492, a second driven wheel 4493, a third driven wheel 4494, and a fourth driven wheel 4495. The first motor 441 is connected to the driving wheel 4491. The first driven wheel 4492 and the second driven wheel 4493 are both meshed with the driving wheel 4491. The third driven wheel 4494 is meshed with the first driven wheel 4492. The fourth driven wheel 4495 is meshed with the second driven wheel 4493. The third driven wheel 4494 is coaxially connected to the first drive gear 442. The fourth driven wheel 4495 is coaxially connected to the second drive gear 443. With this structure, when the first motor 441 drives the driving wheel 4491 to rotate, the driving wheel 4491 drives the first driven wheel 4492 and the second driven wheel 4493 to rotate. When the first driven wheel 4492 rotates, it drives the third driven wheel 4494 to rotate. When the third driven wheel 4494 rotates, it drives the first driving gear 442 to rotate. When the second driven wheel 4493 rotates, it drives the fourth driven wheel 4495 to rotate. When the fourth driven wheel 4495 rotates, it drives the second driving gear 443 to rotate. In this way, the first motor 441 can drive the first driving gear 442 and the second driving gear 443 to rotate simultaneously.

[0041] In some embodiments of this application, the driving wheel 4491, the first driven wheel 4492, the second driven wheel 4493, the third driven wheel 4494, and the fourth driven wheel 4495 can form a transmission assembly 449, and the first motor 441 drives the first driving gear 442 and the second driving gear 443 to rotate through the transmission assembly 449.

[0042] In some embodiments of this application, the driving wheel 4491, the first driven wheel 4492, the second driven wheel 4493, the third driven wheel 4494, and the fourth driven wheel 4495 are all mounted on the support plate.

[0043] In some embodiments of this application, such as Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 10As shown, the discharge assembly 5 includes a screw and a scraper. The scraper is disposed in the discharge chamber 4323 and is sleeved on the screw with a threaded connection. The two ends of the screw are rotatably connected to the left fixed plate 431 and the right fixed plate 433, respectively. A fourth driven gear is fixed to one end of the screw, and the fourth driven gear meshes with the first internal gear ring. A collection box 7 is provided on the base 1. The two ends of the discharge chamber 4323 pass through the left fixed plate 431 and the right fixed plate 433, respectively. Guide pipes are provided on the outer surfaces of the left fixed plate 431 and the right fixed plate 433. One end of the guide pipe is connected to the discharge chamber 4323, and the other end is connected to the collection box 7. With this structure, when the first gear ring 444 rotates, it can drive the fourth driven gear to rotate. When the fourth driven gear rotates, it can drive the screw to rotate. When the screw rotates, it can drive the scraper to slide along the axial direction of the screw. When the scraper moves, it scrapes the grain in the discharge chamber 4323. The scraped grain is discharged into the collection box 7 through the guide pipe.

[0044] In some embodiments of this application, the collection bin 7 is provided with a pull-out collection plate.

[0045] In some embodiments of this application, the inner grinding cylinder 42 is provided with multiple discharge holes at both ends, and the multiple discharge holes are arranged sequentially along the circumference of the inner grinding cylinder 42. One end of the guide pipe is connected to the discharge chamber 4323, and the other end faces the discharge hole. The collection box 7 is provided with a collection trough, and the inner wall of the outer cylinder 41 is provided with an elongated hole extending along its axial direction. There is a discharge chamber between the outer wall of the inner grinding cylinder 42 and the inner wall of the outer cylinder 41. The discharge hole and the discharge chamber are connected, and the collection trough is connected to the discharge chamber through the elongated hole. The outer circumferential surface of the inner grinding cylinder 42 is provided with spiral blades. With this structure, the feed pipe transports the grain in the discharge chamber 4323 to the inner wall of the inner grinding cylinder 42. When the inner grinding cylinder 42 rotates, the grain is discharged through the discharge hole into the discharge chamber between the outer wall of the inner grinding cylinder 42 and the inner wall of the outer cylinder 41. Furthermore, the outer circumferential surface of the inner grinding cylinder 42 is provided with spiral blades. When the inner grinding cylinder 42 rotates, the spiral blades can drive the grain forward. At this time, the grain can flow out through the elongated hole on the outer cylinder 41 into the collection box 7.

[0046] In some embodiments of this application, the elongated hole is located at the bottom of the outer cylinder 41 so that the grain in the discharge chamber can be discharged through the elongated hole into the collection box 7.

[0047] In some embodiments of this application, such as Figure 3 and Figure 4As shown, there are three sieve hole areas, which are respectively the first sieve hole area 211, the second sieve hole area 212 and the third sieve hole area 213. There are two sets of grinding roller groups 45, and the two sets of grinding roller groups 45 correspond to the second sieve hole area 212 and the third sieve hole area 213, respectively. The support frame 432 also includes a partition plate 4326, which is disposed between the two sets of grinding roller groups 45. The partition plate 4326 is used to separate the feed chamber 4321, the first abrasive chamber 4322 and the second abrasive chamber 4324 corresponding to the two sets of grinding roller groups 45. A material collection cylinder is also sleeved on the outside of the filter screen cylinder 21. A guide box 8 is also provided on the base 1. One end of the guide box 8 is connected to the material collection cylinder and the other end is connected to the material collection box 7. This structure, using a partition 4326 to separate the feed chamber 4321, the first grinding chamber 4322, and the second grinding chamber 4324 corresponding to the two grinding roller groups 45, prevents grain from one grinding roller group 45 from mixing into the other, thus affecting the grinding quality. Grain sieved through the first sieve area 211 is collected by the collection cylinder and the guide box 8, allowing grain meeting the particle size requirements to be directly conveyed to the collection box 7, thereby further improving the efficiency of grain grinding.

[0048] In some embodiments of this application, the aperture of the sieve holes in the first sieve hole region 211 is smaller than the aperture of the sieve holes in the second sieve hole region 212, and the aperture of the sieve holes in the second sieve hole region 212 is smaller than the aperture of the sieve holes in the third sieve hole region 213.

[0049] In some embodiments of this application, the discharge chambers 4323 corresponding to the two sets of grinding roller groups 45 are connected.

[0050] In some embodiments of this application, three partitions 4326 are provided, which are respectively located in the feed chamber 4321, the first abrasive chamber 4322, and the second abrasive chamber 4324, and are all located between the two sets of grinding roller groups 45. In this way, the three partitions 4326 can separate the feed chamber 4321, the first abrasive chamber 4322, and the second abrasive chamber 4324 corresponding to the two sets of grinding roller groups 45.

[0051] In some embodiments of this application, such as Figure 1 , Figure 2 and Figure 4 As shown, the feeding assembly 2 also includes a feeding cone 23 and a feeding pipe 24. A bracket is provided on the base 1, and the feeding cone 23 is fixed on the bracket. One end of the feeding pipe 24 is connected to the feeding cone 23, and the other end is connected to the filter screen cylinder 21. With this structure, grains can be conveyed to the auger 22 through the feeding cone 23 and the feeding pipe 24, making the feeding operation of the device more convenient.

[0052] In some embodiments of this application, such as Figure 1 , Figure 2 and Figure 4 As shown, the drive assembly 3 includes a second motor 31, a bearing housing 32, and a drive shaft 33. The drive shaft 33 is connected to the auger 22 and is mounted on the bearing housing 32. The second motor 31 is mounted on the bearing housing 32 and is connected to the drive shaft 33 for transmission. This structure improves the overall stability of the grinding device. Simultaneously, the second motor 31 can drive the auger 22 to rotate via the drive shaft 33, ensuring normal grain transport.

[0053] In some embodiments of this application, the second motor 31 can be connected to the transmission shaft 33 via a gear assembly, which can be a worm gear assembly or the like.

[0054] Example 2: This invention provides a grinding method for deep processing of grains, including a grinding device for deep processing of grains as provided in Embodiment 1 above. The grinding device includes a base, a feeding component, a driving component, a grinding component, and a discharging component. The feeding component includes a filter screen cylinder and an auger. The grinding component includes a grinding frame and a grinding mechanism. The grinding frame includes a support frame, and the inside of the support frame is provided with a discharge chamber. The discharging component is disposed in the discharge chamber. The grinding mechanism includes a first motor, a first drive gear, and a first gear ring. The first drive gear is connected to the first motor in a transmission manner, and the first gear ring includes a first internal gear ring and a first external gear ring. The discharge assembly includes a screw and a scraper. The scraper is disposed in the discharge chamber and is sleeved on the screw with the two being threaded together. A fourth driven gear is fixed at one end of the screw and meshes with the first internal gear ring. The drive assembly includes a second motor, a bearing housing, and a drive shaft. The drive shaft is connected to the auger and is mounted on the bearing housing. The second motor is mounted on the bearing housing and is connected to the drive shaft for transmission. The methods include: The first motor is controlled to rotate forward, which drives the screw to rotate through the first drive gear and the first gear ring. When the screw rotates, it drives the scraper to slide along the first direction. The first motor is controlled to reverse, which drives the screw to rotate through the first drive gear and the first gear ring. When the screw rotates, it drives the scraper to slide in the second direction, and the first direction and the second direction are opposite. According to the first preset time, the first motor is controlled to periodically switch between forward and reverse rotation to control the scraper to reciprocate and scrape the grain. The first preset time can be set according to actual usage needs, which will not be elaborated here. The second motor is controlled to rotate forward, which drives the auger to rotate clockwise via the transmission shaft. When the auger rotates, it drives the grain to be conveyed in a third direction. The second motor is controlled to reverse, which drives the auger to rotate counterclockwise through the transmission shaft. When the auger rotates, it drives the grain to be conveyed along the fourth direction, which is opposite to the fourth direction. According to the second preset time, the second motor is controlled to periodically switch between forward and reverse rotation to drive the grains in the filter cylinder to reciprocate for screening.

[0055] The beneficial effects of Embodiment 2 and its various implementations of the present invention can be found in the analysis of the beneficial effects of Embodiment 1 and its various implementations, and will not be repeated here. Furthermore, by controlling the first motor to periodically switch between forward and reverse rotation, and controlling the second motor to periodically switch between forward and reverse rotation, this embodiment can further improve the grinding efficiency and grinding quality of grains.

[0056] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0059] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A grinding device for deep processing of grains, characterized in that, Includes a base, feeding assembly, drive assembly, grinding assembly, and discharge assembly; The feeding assembly includes a filter screen cylinder and an auger. The auger is sleeved inside the filter screen cylinder. The driving assembly is used to drive the auger to rotate. Multiple screen hole areas are sequentially provided on the outer circumferential surface of the filter screen cylinder along its axial direction. The aperture of the screen holes in the multiple screen hole areas increases sequentially. The grinding assembly includes an outer cylinder, an inner grinding cylinder, a grinding frame, a grinding mechanism, and multiple sets of grinding rollers. The outer cylinder is fixed to the base, the inner grinding cylinder is rotatably connected to the outer cylinder, and the grinding frame is disposed inside the inner grinding cylinder. The grinding frame includes a left fixed plate, a support frame, and a right fixed plate. Both the left and right fixed plates are fixedly connected to the outer cylinder. The multiple sets of grinding rollers correspond to multiple sieve hole areas, and each set of grinding rollers includes multiple main grinding rollers. The grinding mechanism is used to drive the inner grinding cylinder and the main grinding rollers to rotate. The support frame has an internal feeding chamber, a first abrasive chamber, and a discharge chamber. A second abrasive chamber is formed between the support frame and the inner grinding cylinder. The filter screen cylinder is disposed in the feeding chamber. The main grinding roller is disposed in the first abrasive chamber. The feeding chamber, the first abrasive chamber, and the second abrasive chamber are connected in sequence. The discharge chamber is connected to the second abrasive chamber. The discharge assembly is disposed in the discharge chamber.

2. The grinding apparatus for deep processing of grains according to claim 1, characterized in that, The support frame includes a frame body and an arc-shaped plate. The frame body is provided with the feeding chamber and the first abrasive chamber. The arc-shaped plate protrudes outward toward the frame body and is fixedly connected to the frame body. The discharge chamber is located between the arc-shaped plate and the frame body. The arc-shaped plate is provided with discharge filter holes. The grinding assembly also includes multiple auxiliary grinding rollers, which are disposed between the arc-shaped plate and the inner grinding cylinder. There is a grinding gap between the auxiliary grinding rollers and the inner wall of the inner grinding cylinder, and the grinding gap between the multiple auxiliary grinding rollers and the inner wall of the inner grinding cylinder gradually decreases. Multiple main grinding rollers and multiple auxiliary grinding rollers are staggered along the circumference of the inner grinding cylinder. Each auxiliary grinding roller has a feeding roller on both sides. The grinding mechanism is used to drive the auxiliary grinding rollers and the feeding rollers to rotate.

3. The grinding apparatus for deep processing of grains according to claim 2, characterized in that, The grinding mechanism includes a first motor, a first drive gear, a second drive gear, a first gear ring, a second gear ring, a first driven gear, a second driven gear, and a third driven gear; Both the first drive gear and the second drive gear are connected to the first motor. The first gear ring includes a first internal gear ring and a first external gear ring. The first drive gear meshes with the first internal gear ring. Both the first driven gear and the second driven gear mesh with the first external gear ring. The first driven gear is coaxially connected to the main grinding roller, and the second driven gear is coaxially connected to the auxiliary grinding roller. The second gear ring includes a second internal gear ring and a second external gear ring. A third gear ring is provided on the inner wall of the inner grinding cylinder. The third driven gear meshes with the second internal gear ring, and the third gear ring meshes with the second external gear ring. The third driven gear and the feeding roller are coaxially connected.

4. The grinding apparatus for deep processing of grains according to claim 3, characterized in that, The grinding mechanism further includes a driving wheel, a first driven wheel, a second driven wheel, a third driven wheel, and a fourth driven wheel. The first motor is connected to the driving wheel. The first driven wheel and the second driven wheel are both meshed with the driving wheel. The third driven wheel is meshed with the first driven wheel. The fourth driven wheel is meshed with the second driven wheel. The third driven wheel is coaxially connected to the first driving gear, and the fourth driven wheel is coaxially connected to the second driving gear.

5. The grinding apparatus for deep processing of grains according to claim 3, characterized in that, The discharge assembly includes a screw and a scraper. The scraper is disposed in the discharge chamber and is sleeved on the screw with the two being threaded together. The two ends of the screw are rotatably connected to the left fixed plate and the right fixed plate, respectively. A fourth driven gear is fixed at one end of the screw, and the fourth driven gear meshes with the first internal gear ring. The base is provided with a material collection box. The two ends of the discharge chamber pass through the left fixing plate and the right fixing plate respectively. The outer surfaces of the left fixing plate and the right fixing plate are provided with guide pipes. One end of the guide pipe is connected to the discharge chamber and the other end is connected to the material collection box.

6. The grinding apparatus for deep processing of grains according to claim 5, characterized in that, Both ends of the inner grinding cylinder are provided with multiple discharge holes, which are arranged sequentially along the circumference of the inner grinding cylinder. One end of the guide pipe is connected to the discharge chamber, and the other end faces the discharge hole. The material collection box is provided with a material collection trough, and the inner wall of the outer cylinder is provided with an elongated hole extending along its axial direction. There is a discharge cavity between the outer wall of the inner grinding cylinder and the inner wall of the outer cylinder. The discharge hole and the discharge cavity are connected. The material collection trough is connected to the discharge cavity through the elongated hole. The outer circumferential surface of the inner grinding cylinder is provided with spiral blades.

7. The grinding apparatus for deep processing of grains according to claim 6, characterized in that, The sieve aperture area is provided in three places, and the three sieve aperture areas are sequentially referred to as the first sieve aperture area, the second sieve aperture area and the third sieve aperture area. The grinding roller group is provided in two groups, and the two groups of grinding roller groups correspond to the second sieve aperture area and the third sieve aperture area respectively. The support frame also includes a partition plate, which is disposed between the two sets of the grinding roller groups. The partition plate is used to separate the feed chamber, the first abrasive chamber and the second abrasive chamber corresponding to the two sets of the grinding roller groups. The filter screen cylinder is also fitted with a material collection cylinder, and the base is also provided with a material guide box. One end of the material guide box is connected to the material collection cylinder, and the other end is connected to the material collection box.

8. The grinding apparatus for deep processing of grains according to claim 7, characterized in that, The feeding assembly also includes a feeding cone and a feeding pipe. A bracket is provided on the base, the feeding cone is fixed on the bracket, one end of the feeding pipe is connected to the feeding cone, and the other end is connected to the filter screen cylinder.

9. The grinding apparatus for deep processing of grains according to claim 1, characterized in that, The drive assembly includes a second motor, a bearing housing, and a drive shaft. The drive shaft is connected to the auger and is mounted on the bearing housing. The second motor is mounted on the bearing housing and is connected to the drive shaft for transmission.

10. A grinding method for deep processing of grains, characterized in that, The invention includes a grinding device for deep processing of grains as described in any one of claims 1-9, the grinding device comprising a base, a feeding assembly, a driving assembly, a grinding assembly, and a discharging assembly, the feeding assembly comprising a filter screen cylinder and an auger, the grinding assembly comprising a grinding frame and a grinding mechanism, the grinding frame comprising a support frame, the support frame having an internal discharge chamber, and the discharging assembly disposed in the discharge chamber; The grinding mechanism includes a first motor, a first drive gear, and a first gear ring. The first drive gear is connected to the first motor in a transmission manner, and the first gear ring includes a first inner gear ring and a first outer gear ring. The discharge assembly includes a screw and a scraper. The scraper is disposed in the discharge chamber and is sleeved on the screw with the two being threaded together. A fourth driven gear is fixed at one end of the screw, and the fourth driven gear meshes with the first internal gear ring. The drive assembly includes a second motor, a bearing housing, and a drive shaft. The drive shaft is connected to the auger and is mounted on the bearing housing. The second motor is mounted on the bearing housing and is connected to the drive shaft in a driving connection. The method includes: The first motor is controlled to rotate forward, and the screw is driven to rotate through the first drive gear and the first gear ring. When the screw rotates, the scraper slides along the first direction. The first motor is controlled to reverse, and the screw is driven to rotate through the first drive gear and the first gear ring. When the screw rotates, the scraper is driven to slide along the second direction, which is opposite to the first direction. According to a first preset time, the first motor is controlled to periodically switch between forward and reverse rotation in order to control the scraper to reciprocate and scrape the grain. The second motor is controlled to rotate forward, which drives the auger to rotate clockwise via the transmission shaft. When the auger rotates, it drives the grain to be conveyed in a third direction. The second motor is controlled to reverse, which drives the auger to rotate counterclockwise through the transmission shaft. When the auger rotates, it drives the grain to be transported along the fourth direction, which is opposite to the fourth direction. According to the second preset time, the second motor is controlled to periodically switch between forward and reverse rotation to drive the grains in the filter cylinder to reciprocate for screening.

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