Raw material pretreatment system for corn processing

Abstract

The invention discloses a raw material pretreatment system for corn processing, and relates to the technical field of corn processing, the raw material pretreatment system comprises an inclined screening tank, and further comprises a screening assembly used for screening corn, and the screening assembly is installed in the inclined screening tank; the material stirring mechanism is used for stirring the corn in the screening assembly, and the material stirring mechanism is installed in the screening assembly; and the adjusting assembly is used for adjusting the distance between the material stirring mechanism and the screening assembly. According to the corn screening device, firstly, a crank is used for rotating a gear to drive the screening barrel to rotate in the inclined screening tank, the screening parts can be replaced and adjusted, corn with different particle sizes can be screened through the screening parts with different mesh numbers, and the screening barrel can be adjusted easily and rapidly; corn with the particle size not meeting the requirement can be rapidly discharged out of the screening barrel, the screening barrel can be dredged, and the screening barrel is prevented from being blocked by the corn.

Description

Technical Field

[0001] The invention relates to the technical field of corn processing, in particular to a raw material pretreatment system for corn processing. Background Art

[0002] Corn, also known as maize, corn, and rice, is one of the most important food crops in the world, and is also an important feed and industrial raw material. Corn can be converted into a variety of high value-added products through processing equipment, which are widely used in food, feed, chemical, energy and other industries.

[0003] Screening devices have important applications in corn pre-processing. During corn processing, the crushed corn particles need to be classified according to size so that they can be used for different purposes. For example, fine corn flour can be used for food processing, while larger particles can be used for feed or further processing. Screening devices use screens with different apertures to classify the crushed corn particles and increase the range of product applications.

[0004] The existing corn screening equipment on the market directly introduces the crushed corn into the screen cylinder, and screens the crushed corn while crushing the corn. For the corn that does not meet the particle size requirements, it will be directly discharged from the screening equipment into the crushing equipment for re-crushing, which effectively improves the screening efficiency of corn. However, during the use of the screening equipment, the mesh size of the sieve inside the screening equipment is single, so when the required corn particle size changes, it is necessary to open the screening equipment and replace the sieve with the corresponding mesh size, which makes the operation of selecting the sieve with the corresponding mesh size according to the corn particle size more complicated and needs to be optimized. Summary of the invention

[0005] The object of the present invention is to provide a raw material pretreatment system for corn processing to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A raw material pretreatment system for corn processing, comprising an inclined screening tank equipped with an observation window, a discharge port fixedly installed at the lower end of the inclined screening tank, a left sealing cover fixedly installed at the left end of the inclined screening tank, a feed pipe fixedly embedded at the center of the left end of the left sealing cover, a right sealing cover fixedly installed at the right end of the inclined screening tank, a discharge pipe fixedly installed at the lower end of the right sealing cover, and further comprising: A screening assembly is used for screening corn, and the screening assembly is installed inside the inclined screening tank; the screening assembly comprises a screening cylinder movably installed inside the inclined screening tank, and the screening cylinder is provided with a plurality of screening parts with different screening meshes, the outer side of the screening cylinder is fixedly sleeved with two symmetrically distributed support rings, the screening part of the screening cylinder is located between the two support rings, and a plurality of support rods are fixedly installed on the inner walls of the left sealing cover and the right sealing cover; A material-moving mechanism, used for moving the corn inside the screening assembly, wherein the material-moving mechanism is installed inside the screening assembly; An adjusting component is used to adjust the distance between the material dispensing mechanism and the screening component. There are two adjusting components, one of which is installed between the screening component and the left sealing cover, and the other is installed between the left sealing cover and the right sealing cover.

[0007] Preferably, a ball is movably embedded in one end of the support rod close to the support ring, and the ball is rollingly connected to the support ring through an arc rolling groove. A plurality of convex teeth are fixedly installed on the outer side of the screening cylinder, and the plurality of convex teeth are equidistantly distributed around the circumference. The convex teeth are close to the left end of the screening cylinder, and a gear is installed on the outer side of the screening cylinder through a plurality of convex teeth. A protective cover is movably sleeved on the outer side of the gear, and the protective cover is fixedly connected to the left sealing cover.

[0008] Preferably, a positioning shaft is fixedly connected to the center of the gear, and the positioning shaft is rotatably connected to the protective cover through a bearing. A rectangular rod is fixed to one end of the positioning shaft, and a sleeve is movably sleeved on the outer side of the rectangular rod. The connection between the sleeve and the rectangular rod is a plug-in connection, and a crank is fixedly connected to the end of the sleeve away from the gear.

[0009] Preferably, the material discharging mechanism includes a rotating shaft installed on the inner side of the screening drum, a motor is installed on the inner end of the right sealing cover, the rotating shaft is fixedly connected to the output shaft of the motor, two symmetrically distributed support rings are movably sleeved on the outer side of the rotating shaft, and the rotating shaft is rotatably connected to the support ring through a bearing.

[0010] Preferably, the two support rings are fixedly connected to the feed pipe and the right sealing cover respectively through long connecting rods, a plurality of brushes are movably fitted on the inner wall of the screening cylinder, a fixing plate is fixedly installed on the side of the brush close to the rotating shaft, and two symmetrically distributed sleeves are fixedly installed on the upper end of the fixing plate.

[0011] Preferably, the two sleeves are located inside the screening cylinder, a cylindrical rod is movably embedded in the upper end of the sleeve, and the end of the cylindrical rod away from the sleeve is fixedly connected to the rotating shaft, the end of the cylindrical rod away from the rotating shaft is fixedly connected with a gasket, and the side of the gasket away from the cylindrical rod is movably abutted against a straight spring.

[0012] Preferably, the adjustment assembly includes a push rod fixedly mounted on the fixing plate, the push rod is located on the side of the fixing plate where the brush is mounted, a push bead is fixedly embedded on the end of the push rod away from the fixing plate, arc baffles are fixedly mounted on the inner walls of the left and right sealing covers, the arc baffles are arched in shape, and beveled edges are provided at both ends of the arc baffles, a plurality of grooves are provided on the side of the arc baffles close to the push bead, the plurality of grooves are equidistantly distributed, and the push bead is in sliding contact with the arc baffle.

[0013] Preferably, a positioning assembly is installed on the outside of the sleeve, and the positioning assembly includes a tubular seat movably sleeved on the outside of the sleeve, the inner ring diameter of the tubular seat is larger than the outer ring diameter of the sleeve, and the connection between the tubular seat and the protective cover is a fixed connection.

[0014] Preferably, the outer side of the sleeve is movably abutted with four positioning plates, and the four positioning plates are equidistantly distributed around the circumference. The positioning plates are rotatably connected to the tubular seat via a connecting shaft, and an arc spring is fixedly installed on the side of the positioning plate close to the gear, and the end of the arc spring away from the positioning plate is fixedly connected to the tubular seat, and a roller is rotatably installed on the end of the positioning plate close to the rectangular rod, and the connection between the roller and the sleeve is rolling contact.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention installs a screening component, and a plurality of screening parts with different screening mesh numbers are arranged on the screening cylinder in the screening component. The screening cylinder is driven to rotate inside the inclined screening tank by rotating the gear through a crank, and the screening part of the screening cylinder located on the upper side of the discharge port can be replaced and adjusted. Corns of different particle sizes can be screened through the screening parts with different mesh numbers, so that the adjustment of the screening cylinder is relatively simple and quick.

[0016] 2. The present invention installs a material-discharging mechanism, in which a motor drives a plurality of brushes to rotate the screening part of the screening cylinder located on the upper side of the discharge port. This can not only increase the screening speed of corn in the screening cylinder and assist in quickly discharging corn with particle size that does not meet the requirements from the screening cylinder, but also dredge the screening cylinder to prevent the screening cylinder from being blocked by corn.

[0017] 3. The present invention installs an adjusting component. When the top rod in the adjusting component presses against the arc baffle bar, the brush can be separated from the screening cylinder. This is beneficial for the corn carried away by the brush to roll down along the inner wall of the screening cylinder, and is beneficial for preventing the brush from fitting with the screening part located outside the upper side of the discharge port during rotation, thereby effectively reducing the wear of the brush and extending the service life of the brush.

[0018] 4. The present invention installs a positioning assembly. After the crank is removed, the four positioning plates will be perpendicular to the rectangular rod driven by four arc springs. At this time, the rectangular rod and the gear cannot rotate, so that the screening drum can be positioned to prevent the screening drum from rotating during the screening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 It is a side sectional schematic diagram of the present invention; Figure 3 It is an overall schematic diagram of the internal structure of the screening cylinder of the present invention; Figure 4 It is a schematic diagram of the connection between the material-dispensing mechanism and the adjusting assembly of the present invention; Figure 5 It is an overall schematic diagram of the screening cylinder of the present invention; Figure 6 This is a schematic diagram of the disassembly of the crank and the gear of the present invention; Figure 7 It is a side cross-sectional schematic diagram of the crank handle and the tubular seat of the present invention; Figure 8 For the present invention Figure 2 The enlarged schematic diagram of point A in the middle; Fig. 9 For the present invention Figure 4 Schematic diagram of the side section at B in the middle.

[0020] In the figure: 1. inclined screening tank; 2. discharge port; 3. left sealing cover; 4. feed pipe; 5. right sealing cover; 6. discharge pipe; 7. screening cylinder; 8. support ring; 9. support rod; 10. ball; 11. rotating shaft; 12. motor; 13. support ring; 14. brush; 15. fixing plate; 16. sleeve; 17. cylindrical rod; 18. gasket; 19. straight spring; 20. ejector rod; 21. ejector ball; 22. arc stop bar; 23. bevel edge; 24. groove; 25. convex tooth; 26. gear; 27. protective cover; 28. positioning shaft; 29. ​​rectangular rod; 30. sleeve; 31. crank; 32. tubular seat; 33. positioning plate; 34. connecting shaft; 35. arc spring; 36. roller. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1: Please refer to Figure 1-Figure 3 , Figure 5 , Figure 8 The raw material pretreatment system for corn processing shown in the figure includes an inclined screening tank 1 equipped with an observation window, a discharge port 2 connected to the inclined screening tank 1 is fixedly installed at the lower end, a left sealing cover 3 is fixedly installed at the left end of the inclined screening tank 1, a feed pipe 4 is fixedly embedded at the center of the left end of the left sealing cover 3, a right sealing cover 5 is fixedly installed at the right end of the inclined screening tank 1, a discharge pipe 6 connected to the inclined screening tank 5 is fixedly installed at the lower end of the right sealing cover 5, and a screening assembly for screening corn is installed inside the inclined screening tank 1; a material shifting mechanism is used to shift the corn inside the screening assembly, and the material shifting mechanism is installed inside the screening assembly; an adjusting assembly is used to adjust the distance between the material shifting mechanism and the screening assembly, and the number of adjusting assemblies is two groups, and the two adjusting assemblies are respectively installed between the screening assembly and the left sealing cover 3 and the right sealing cover 5.

[0023] The screening assembly includes a screening drum 7 movably installed inside the inclined screening tank 1, and the screening drum 7 has multiple screening parts with different screening mesh numbers. Two symmetrically distributed support rings 8 are fixedly sleeved on the outer side of the screening drum 7, and the screening part of the screening drum 7 is located between the two support rings 8. The screening drum 7 can rotate inside the inclined screening tank 1. The two support rings 8 are respectively located on the inner sides of the left sealing cover 3 and the right sealing cover 5. A plurality of support rods 9 equidistantly distributed around the circumference are fixedly installed on the inner walls of the left sealing cover 3 and the right sealing cover 5 corresponding to the support rings 8.

[0024] A ball 10 is movably embedded in one end of the support rod 9 close to the support ring 8, and the ball 10 is rollingly connected to the support ring 8 through an arc rolling groove. A plurality of convex teeth 25 equidistantly distributed around the circumference are fixedly mounted on the outer side of the screening drum 7, and the convex teeth 25 are close to the left end of the screening drum 7. A gear 26 is mounted on the outer side of the screening drum 7 through the plurality of convex teeth 25. The gear 26 can drive the screening drum 7 to rotate through the plurality of convex teeth 25. A protective cover 27 is movably sleeved on the outer side of the gear 26, and the connection between the protective cover 27 and the left sealing cover 3 is a fixed connection.

[0025] A positioning shaft 28 is fixedly passed through the center of the gear 26 and is rotatably connected to the protective cover 27 through a bearing. A rectangular rod 29 is fixedly embedded in the center of one end of the positioning shaft 28. A sleeve 30 is movably sleeved on the outer side of the rectangular rod 29, and the connection between the sleeve 30 and the rectangular rod 29 is a plug-in connection. A crank 31 is fixedly connected to the end of the sleeve 30 away from the gear 26, and the crank 31 is used to rotate the gear 26.

[0026] Working principle: The crushed corn enters the screening cylinder 7 in the inclined screening tank 1 through the feed pipe 4. The screening part of the screening cylinder 7 located on the upper side of the discharge port 2 screens the corn, while other screening parts of the screening cylinder 7 are blocked by the inner wall of the inclined screening tank 1 and cannot screen the corn. After the corn is screened by the screening part of the screening cylinder 7 located on the upper side of the discharge port 2, the corn that meets the particle size requirements will be discharged through the discharge port 2, and the corn that does not meet the particle size requirements will roll along the screening cylinder 7 to the right sealing cover 5, and finally be discharged through the discharge pipe 6. The corn discharged from the discharge pipe 6 will re-enter the crushing mechanism through the conveying equipment and be crushed again; When corn of other particle sizes is needed, the personnel puts the sleeve 30 at the end of the crank 31 on the outside of the rectangular rod 29 (the crank 31 and the rectangular rod 29 are convenient for disassembly and assembly, and can prevent the crank 31 from protruding and causing the personnel to hit their hands). Then the personnel rotates the gear 26 by the crank 31, and the gear 26 drives the screening drum 7 to rotate through a plurality of convex teeth 25. During the rotation process, the personnel can observe the interior of the inclined screening tank 1 through the observation window until the corresponding screening part on the screening drum 7 rotates to the upper side of the discharge port 2. The gear 26 is rotated by the crank 31 to drive the screening drum 7 to rotate inside the inclined screening tank 1. The screening part of the screening drum 7 located on the upper side of the discharge port 2 can be replaced and adjusted, and corn of different particle sizes can be screened by screening parts with different mesh sizes, so that the adjustment of the screening drum 7 is relatively simple and quick.

[0027] Example 2: Please refer to Figure 3 , Figure 4 This embodiment further explains the first embodiment. The material-displacing mechanism includes a rotating shaft 11 installed on the inner side of the screening drum 7. The right end of the rotating shaft 11 is fixedly connected to a motor 12, and the connection between the motor 12 and the right sealing cover 5 is a fixed connection. Two symmetrically distributed support rings 13 are movably sleeved on the outer side of the rotating shaft 11, and the rotating shaft 11 is rotatably connected to the support ring 13 through a bearing. The support ring 13 is used to support both ends of the rotating shaft 11.

[0028] The two support rings 13 are respectively located inside the left sealing cover 3 and the right sealing cover 5. The two support rings 13 are respectively fixedly connected to the feed pipe 4 and the right sealing cover 5 through long connecting rods. A plurality of brushes 14 equidistantly distributed in a circle are movably fitted on the inner wall of the screening drum 7. A fixing plate 15 is fixedly installed on one side of the brush 14 close to the rotating shaft 11. The brush 14 is used to sweep the corn in the screening drum 7. Two symmetrically distributed sleeves 16 are fixedly installed on the upper end of the fixing plate 15.

[0029] The two sleeves 16 are located inside the screening cylinder 7, and a cylindrical rod 17 is movably embedded in the upper end of the sleeve 16, and the end of the cylindrical rod 17 away from the sleeve 16 is fixedly connected to the rotating shaft 11, and a gasket 18 is fixedly connected to the inside of the sleeve 16 at the end of the cylindrical rod 17 away from the rotating shaft 11, and a straight spring 19 is movably abutted on the side of the gasket 18 away from the cylindrical rod 17. The gasket 18 is used to prevent the cylindrical rod 17 from detaching from the sleeve 16.

[0030] In this embodiment: after the crushed corn enters the screening drum 7, the motor 12 drives the rotating shaft 11 to rotate, and the rotating shaft 11 drives multiple brushes 14 to rotate inside the screening drum 7 through the cylindrical rod 17. When the brush 14 rotates to the screening part of the screening drum 7 located on the upper side of the discharge port 2, the brush 14 will fit with the screening part at this time, so that the brush 14 can sweep the corn inside the screening drum 7 during the rotation, which can prevent the corn from piling up and speed up the screening speed of the corn. In addition, the brush 14 fits the screening drum 7 to rotate, and can also dredge the screening drum 7 to prevent the corn from clogging the sieve holes of the screening drum 7. Since the inclined screening tank 1 and the screening drum 7 are both in an inclined state, the brush 14 sweeping the corn is also helpful to assist the corn that does not meet the particle size requirements to roll from the screening drum 7 to the right sealing cover 5, and finally be discharged through the discharge pipe 6.

[0031] Example 3: Please refer to Figure 4 , Fig. 9 , this embodiment further explains the second embodiment, the adjustment component includes a push rod 20 fixedly installed on the fixed plate 15, and the push rod 20 is located on the side of the fixed plate 15 where the brush 14 is installed, and a push ball 21 is fixedly embedded at one end of the push rod 20 away from the fixed plate 15, and arc retaining strips 22 are fixedly installed on the inner walls of the left and right closures 3 and 5 corresponding to the push rods 20, and the arc retaining strips 22 are fixedly connected to the left and right closures 3 and 5 through multiple fixing rods, and the shape of the arc retaining strips 22 is arched, and both ends of the arc retaining strips 22 are provided with beveled edges 23, and a plurality of grooves 24 distributed at equal distances are opened on the side of the arc retaining strip 22 close to the push ball 21, and the push ball 21 is in sliding contact with the arc retaining strip 22 through the beveled edges 23 and the grooves 24.

[0032] In this embodiment: when the rotating shaft 11 drives the brush 14 to rotate away from the screening part located on the upper side of the discharge port 2, the top ball 21 slides through the bevel portion 23 of the arc baffle 22, so that the brush 14 will gradually move away from the inner wall of the screening drum 7 during the rotation. At this time, the corn swept away by the brush 14 will roll along the inner wall of the screening drum 7. In the process of the top ball 21 sliding in contact with the arc baffle 22 through multiple grooves 24, the brush 14 will be prevented from fitting with the screening part other than the upper side of the discharge port 2 during the rotation, thereby effectively reducing the wear of the brush 14 and extending the service life of the brush 14. It will also cause the brush 14 to generate continuous vibration during the rotation, which is conducive to shaking off the corn that may be stuck in the brush 14.

[0033] Example 4: Please refer to Figure 6 , Figure 7 This embodiment further explains Example 3. A positioning assembly is installed on the outside of the sleeve 30. The positioning assembly includes a tubular seat 32 that is movably sleeved on the outside of the sleeve 30, and the inner ring diameter of the tubular seat 32 is larger than the outer ring diameter of the sleeve 30. The connection between the tubular seat 32 and the protective cover 27 is a fixed connection, and the protective cover 27 is used to protect the gear 26.

[0034] The outer side of the sleeve 30 is movably abutted with four positioning plates 33 that are equidistantly distributed around the circumference, and the positioning plate 33 is rotatably connected to the tubular seat 32 through a connecting shaft 34. An arc spring 35 is fixedly installed on the side of the positioning plate 33 close to the gear 26. The connection between the positioning plate 33 and the rectangular rod 29 is a movable abutment, and the end of the arc spring 35 away from the positioning plate 33 is fixedly connected to the tubular seat 32. A roller 36 is rotatably installed on the end of the positioning plate 33 close to the rectangular rod 29, and the connection between the roller 36 and the sleeve 30 is a rolling contact.

[0035] In this embodiment: when installing the crank 31, the sleeve 30 is sleeved on the outside of the rectangular rod 29. The sleeve 30 will drive the positioning plate 33 to rotate during the movement. Since the sleeve 30 is cylindrical, the sleeve 30 can resist the rotation of the four rollers 36. When the crank 31 is removed, since the roller 36 can rotate at the end of the positioning plate 33, the crank 31 can be removed. After the crank 31 is removed, the positioning plate 33 will rotate and reset under the drive of the compression force of the arc spring 35, and it will be perpendicular to the rectangular rod 29. The four positioning plates 33 perpendicular to the rectangular rod 29 can block the rotation of the rectangular rod 29, so that the gear 26 and the screening drum 7 can be positioned to prevent the screening drum 7 from rotating inside the inclined screening tank 1 during the screening process.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A raw material pretreatment system for corn processing, comprising an inclined screening tank (1) equipped with an observation window, a discharge port (2) fixedly mounted at the lower end of the inclined screening tank (1), a left sealing cover (3) fixedly mounted at the left end of the inclined screening tank (1), a feed pipe (4) fixedly embedded at the center of the left end of the left sealing cover (3), a right sealing cover (5) fixedly mounted at the right end of the inclined screening tank (1), a discharge pipe (6) fixedly mounted at the lower end of the right sealing cover (5), characterized in that: Also includes: A screening assembly for screening corn, the screening assembly being installed inside an inclined screening tank (1); the screening assembly comprising a screening cylinder (7) movably installed inside the inclined screening tank (1), the screening cylinder (7) being provided with a plurality of screening portions with different screening meshes, two symmetrically distributed support rings (8) being fixedly sleeved on the outer side of the screening cylinder (7), the screening portion of the screening cylinder (7) being located between the two support rings (8), and a plurality of support rods (9) being fixedly installed on the inner walls of the left sealing cover (3) and the right sealing cover (5); A material-moving mechanism, used for moving the corn inside the screening assembly, wherein the material-moving mechanism is installed inside the screening assembly; An adjustment component is used to adjust the distance between the material-dispensing mechanism and the screening component. There are two adjustment components, one of which is installed between the screening component and the left sealing cover (3), and the other is installed between the left sealing cover (3) and the right sealing cover (5).

2. A raw material pretreatment system for corn processing according to claim 1, characterized in that: A ball (10) is movably embedded in one end of the support rod (9) close to the support ring (8), and the ball (10) is rollingly connected to the support ring (8) through an arc rolling groove. A plurality of convex teeth (25) are fixedly mounted on the outer side of the screening cylinder (7), and the plurality of convex teeth (25) are equidistantly distributed around the circumference. The convex teeth (25) are close to the left end of the screening cylinder (7). A gear (26) is mounted on the outer side of the screening cylinder (7) through the plurality of convex teeth (25). A protective cover (27) is movably sleeved on the outer side of the gear (26), and the protective cover (27) is fixedly connected to the left sealing cover (3).

3. A raw material pretreatment system for corn processing according to claim 2, characterized in that: A positioning shaft (28) is fixedly connected to the center of the gear (26), and the positioning shaft (28) is rotatably connected to the protective cover (27) via a bearing. A rectangular rod (29) is fixed to one end of the positioning shaft (28), and a sleeve (30) is movably sleeved on the outer side of the rectangular rod (29). The sleeve (30) and the rectangular rod (29) are connected in a plug-in manner, and a crank (31) is fixedly connected to one end of the sleeve (30) away from the gear (26).

4. The raw material pretreatment system for corn processing according to claim 1, characterized in that: The material-dispensing mechanism comprises a rotating shaft (11) mounted on the inner side of the screening drum (7); a motor (12) is mounted on the inner end of the right sealing cover (5); the rotating shaft (11) is fixedly connected to an output shaft of the motor (12); two symmetrically distributed support rings (13) are movably sleeved on the outer side of the rotating shaft (11); and the rotating shaft (11) is rotatably connected to the support rings (13) via bearings.

5. A raw material pretreatment system for corn processing according to claim 4, characterized in that: The two support rings (13) are respectively fixedly connected to the feed pipe (4) and the right sealing cover (5) through a long connecting rod. A plurality of brushes (14) are movably attached to the inner wall of the screening cylinder (7). A fixing plate (15) is fixedly mounted on one side of the brush (14) close to the rotating shaft (11). Two symmetrically distributed sleeves (16) are fixedly mounted on the upper end of the fixing plate (15).

6. A raw material pretreatment system for corn processing according to claim 5, characterized in that: The two sleeves (16) are located inside the screening cylinder (7); a cylindrical rod (17) is movably embedded in the upper end of the sleeve (16); one end of the cylindrical rod (17) away from the sleeve (16) is fixedly connected to the rotating shaft (11); one end of the cylindrical rod (17) away from the rotating shaft (11) is fixedly connected to a gasket (18); and one side of the gasket (18) away from the cylindrical rod (17) is movably abutted against a straight spring (19).

7. The raw material pretreatment system for corn processing according to claim 1, characterized in that: The adjustment assembly comprises a push rod (20) fixedly mounted on a fixing plate (15), the push rod (20) being located on a side of the fixing plate (15) on which the brush (14) is mounted, a push bead (21) being fixedly embedded on one end of the push rod (20) away from the fixing plate (15), an arc stop bar (22) being fixedly mounted on the inner walls of the left sealing cover (3) and the right sealing cover (5), the arc stop bar (22) being arched in shape, both ends of the arc stop bar (22) being provided with beveled edges (23), a plurality of grooves (24) being provided on a side of the arc stop bar (22) close to the push bead (21), the plurality of grooves (24) being equidistantly distributed, and the push bead (21) being in sliding contact with the arc stop bar (22).

8. The raw material pretreatment system for corn processing according to claim 3, characterized in that: A positioning assembly is installed on the outside of the sleeve (30), the positioning assembly comprising a tubular seat (32) movably sleeved on the outside of the sleeve (30), the inner diameter of the tubular seat (32) being larger than the outer diameter of the sleeve (30), and the connection between the tubular seat (32) and the protective cover (27) being a fixed connection.

9. A raw material pretreatment system for corn processing according to claim 8, characterized in that: Four positioning plates (33) are movably abutted against the outer side of the sleeve (30). The four positioning plates (33) are equidistantly distributed around the circumference. The positioning plates (33) are rotatably connected to the tubular seat (32) via a connecting shaft (34). An arc spring (35) is fixedly mounted on a side of the positioning plate (33) close to the gear (26). An end of the arc spring (35) away from the positioning plate (33) is fixedly connected to the tubular seat (32). A roller (36) is rotatably mounted on an end of the positioning plate (33) close to the rectangular rod (29). The roller (36) and the sleeve (30) are connected in a rolling contact manner.

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