Rotary screening device for grain processing

Abstract

The invention relates to the field of grain screening, in particular to a rotary screening device for grain processing. Comprising a barrel assembly and a vibration assembly connected to the barrel assembly, and further comprises a sealing assembly connected to the barrel assembly, a rotating assembly movably connected to the barrel assembly, a rotating screen plate assembly movably connected to the interior of the barrel assembly and a screening assembly connected to the inner wall of the barrel assembly. On the basis of a conventional rotary vibration sieve, the screening assembly is transformed, the annular sieve plate edge is divided into a plurality of areas, the sieve plate is driven to rotate, and after rotation, large-size stones can be thrown to the rear ends of corn kernels, so that the corn kernels are crushed, and the corn kernels are crushed. The suction assembly is used for applying adsorption force capable of adsorbing the corn kernels to the corn kernels and impurities remaining on the rotating arc piece, and meanwhile, the rotating arc piece is driven to rotate, so that one end of the rotating arc piece can be attached to the middle-end discharging frame, and stones with the mass larger than that of the corn kernels can be discharged from the middle-end discharging frame.

Description

Technical Field

[0001] The invention relates to the field of grain screening, and in particular to a rotary screening device for grain processing. Background Art

[0002] Grain refers to the general term for various plant seeds used in cooking food, which can also be generally referred to as "cereals". Corn kernels are widely consumed as common grain particles. During the processing of corn kernels, they are often mixed with certain stones. Usually, a rotary vibrating screen is set up to separate the corn kernels from the stones.

[0003] However, when the corn kernels are fed into the vibrating screen for screening, it is inevitable that some corn kernels will move faster on the conical screen plate due to gravity and will not be directly screened out by the screen plate. They will move synchronously to the discharge port at the edge of the conical screen along with the stones, resulting in the need for secondary screening of the discharged corn kernel and stone mixture, which in turn affects the working efficiency of the entire vibrating screen.

[0004] Therefore, during the vibration process of the above-mentioned rotary vibrating screen, some corn kernels are not directly separated by the vibrating screen plate, causing some corn kernels and stones to accumulate around the conical screen plate, resulting in the corn kernels and stone mixture discharged from the discharge port needing to be screened again, thereby affecting the screening efficiency. Summary of the invention

[0005] In order to overcome the problem that during the screening process of the existing screening device, some corn kernels are not directly screened by the vibrating screen plate, resulting in the screening machine having to perform secondary screening on the unscreened corn kernels.

[0006] The technical scheme of the present invention is: a rotary screening device for grain processing, comprising a barrel assembly and a vibrating assembly connected to the barrel assembly, and also comprising a sealing assembly connected to the barrel assembly, a rotating assembly movably connected to the barrel assembly, a rotating screen plate assembly movably connected inside the barrel assembly, and a screening assembly connected to the inner wall of the barrel assembly, wherein the sealing assembly is used to seal the top outlet of the barrel assembly, and the rotating assembly is used to rotate around the vertical center axis of the barrel assembly and transport grain into the barrel assembly;

[0007] The rotating screen plate assembly comprises a screening assembly movably connected to the inner side of the cylinder assembly and a rotating assembly connected to the screening assembly, wherein the rotating assembly is used to drive the screening assembly to rotate around the vertical center axis of the cylinder assembly;

[0008] The screening assembly comprises a blanking screen plate movably connected to the inner side of the cylinder assembly, a plurality of rotating arc plates movably connected to the blanking screen plate through a rotating shaft, and a separator connected to the rotating arc plates, the blanking screen plate and the plurality of rotating arc plates are each provided with a plurality of filter holes, and the plurality of rotating arc plates are arranged in a circle around the vertical center axis of the blanking screen plate;

[0009] The screening assembly includes a pulling assembly connected to the inner wall of the cylinder assembly and a suction assembly connected to the pulling assembly. The suction assembly is used to apply the same adsorption force to the grain and impurities retained on the rotating arc piece, and the pulling assembly is used to drive the rotating arc piece to rotate around the longitudinal center axis of the blanking screen plate.

[0010] Preferably, the pulling assembly comprises a push rod protective cover connected to the inner wall of the cylinder assembly, a fixed rod rotatably connected to the push rod protective cover, a push rod sleeve connected to the fixed rod, a second hydraulic push rod connected to the push rod sleeve, a connecting piece movably connected to the second hydraulic push rod, and a fixing strip connected to the connecting piece;

[0011] Preferably, the suction assembly includes a fixed plate connected to the fixed bar, a suction frame movably connected to the fixed plate, a fan frame connected to the suction frame, and a suction fan connected to the fan frame, and a plurality of through holes are provided on the upper end surface of the suction frame, and the second hydraulic push rod is used to drive the suction frame to support the rotating arc plate.

[0012] Preferably, the cylinder assembly includes a second cylinder connected to the vibration assembly, a bottom discharge rack connected to the second cylinder, a first cylinder connected to the second cylinder, a middle discharge rack connected to the first cylinder, a support ring connected to the inner wall of the first cylinder, a top discharge rack connected to the first cylinder, a sealing cover connected to the first cylinder, a blanking inclined plate connected to the inner wall of the second cylinder and a combination frame connected to the second cylinder, a plurality of stone screening holes are provided on the top discharge rack, and the height of the blanking inclined plate gradually increases from close to the bottom discharge rack to far away from the bottom discharge rack.

[0013] Preferably, the rotating assembly includes a second motor connected to the combined frame, a second synchronous wheel connected to the output shaft of the second motor, a positioning rod movably connected to the combined frame, a first synchronous wheel connected to the positioning rod, and a rotating ring connected to the positioning rod.

[0014] Preferably, the positioning rod is fixedly connected to the blanking screen plate, the first synchronous wheel is meshed with the second synchronous wheel, the second motor is used to drive the blanking screen plate to rotate around the vertical center axis of the positioning rod, and the rotating ring is rotationally connected to the blanking inclined plate.

[0015] Preferably, the sealing assembly includes a push rod frame connected to the sealing cover, a first hydraulic push rod connected to the push rod frame, a push block connected to the first hydraulic push rod, a hydraulic guide rod connected to the front and rear sections of the push rod frame, a sealing plate slidably connected to the hydraulic guide rod, and a sealing block connected to the sealing plate, wherein the push block is fixedly connected to the sealing plate.

[0016] Preferably, the vibration assembly includes a fixed base connected to the second cylinder, a plurality of reinforcing plates connected to the fixed base, a plurality of second connecting rods connected to the fixed base, a fixed spring connected to the second connecting rod, a first connecting rod connected to the fixed spring, a mounting base connected to the first connecting rod, a motor bracket connected to the mounting base, and a vibration motor connected to the motor bracket, wherein the first connecting rod and the second connecting rod are arranged in a one-to-one correspondence.

[0017] Preferably, the rotating assembly includes a rotating wheel rotatably connected to the sealing cover, a discharge rack connected to the inside of the rotating wheel, a discharge hopper connected to the discharge rack, a plurality of meshing teeth connected to the rotating wheel, a motor support frame fixed to the sealing cover, a first motor connected to the motor support frame, and a meshing wheel connected to the output shaft of the first motor.

[0018] Preferably, the meshing wheel is meshed with the meshing teeth, the first motor is used to drive the unloading rack to rotate around the vertical center axis of the positioning rod, and the meshing wheel is rotatably connected to the sealing cover.

[0019] Beneficial effects of the present invention:

[0020] 1. On the basis of the conventional rotary vibrating screen, the screening component is modified by dividing the annular screen plate edge into a plurality of rotating arc pieces, and driving the screen plate to rotate. Based on the fact that the larger the mass of the object, the greater the centrifugal force it is subjected to, and the mass of stones of the same volume is often much greater than the mass of corn kernels, after the rotation, the large-volume stones will be thrown to the rear end of the corn kernels, and the corn kernels can contact the rotating arc pieces, and the suction component is used to apply an adsorption force that can adsorb the corn kernels to the corn kernels and impurities remaining on the rotating arc pieces, so that the corn kernels can be closely attached to the rotating arc pieces, and at the same time, the pulling component is used to drive the rotating shaft on the rotating arc piece to rotate, so that one end of the rotating arc piece can be attached to the middle-end discharging rack, and under the action of gravity, the stones with a mass greater than the corn kernels can be discharged from the middle-end discharging rack, so as to separate the large-mass stones and corn kernels accumulated on the rotating arc pieces;

[0021] 2. The first motor is used to drive the material discharging rack to rotate in a circular manner on the upper end of the material discharging screen plate, so that the corn kernels and stones entering from the material discharging hopper can be evenly distributed on a plurality of rotating arc plates to prevent excessive accumulation on some arc plates;

[0022] 3. Move the sealing plate through the first hydraulic push rod so that the sealing block opens the top discharge rack. After the stone screening is completed, the vibration motor acts on the cylinder assembly to directly discharge the corn kernels containing fine stones accumulated on the rotating arc sheet from the top discharge rack. Because stones with the same mass as corn kernels are often much smaller than corn kernels, the fine stones can be separated from the corn kernels through the stone screening holes set on the top discharge rack to obtain pure corn kernels, thereby realizing the screening of fine stones and corn kernels. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 What is shown is a first three-dimensional structural schematic diagram of the rotary screening device of the present invention;

[0024] Figure 2 Shown is a second three-dimensional structural schematic diagram of the rotary screening device of the present invention;

[0025] Figure 3 Shown is a schematic diagram of the three-dimensional structure of the sealing assembly of the rotary screening device of the present invention;

[0026] Figure 4 The figure shows a three-dimensional structure diagram of the rotating assembly of the rotary screening device of the present invention;

[0027] Figure 5 Shown is a schematic diagram of the three-dimensional structure of the rotary screen plate assembly of the rotary screening device of the present invention;

[0028] Figure 6 The present invention is a schematic diagram of the three-dimensional structure of the cylinder assembly of the rotary screening device;

[0029] Figure 7 The diagram shows a three-dimensional structure diagram of a screening assembly of a rotary screening device of the present invention;

[0030] Figure 8 Shown is a schematic diagram of the three-dimensional structure of the pulling assembly of the rotary screening device of the present invention;

[0031] Fig. 9 Shown is a schematic diagram of the three-dimensional structure of the suction assembly of the rotary screening device of the present invention;

[0032] Fig.10 Shown is a schematic diagram of the three-dimensional structure of the vibration component of the rotary screening device of the present invention.

[0033] Description of the accompanying drawings: 1. Cylinder assembly; 2. Vibration assembly; 3. Sealing assembly; 4. Rotating assembly; 5. Rotating screen plate assembly; 6. Screening assembly; 61. Suction assembly; 62. Pulling assembly; 101. Sealing cover; 102. First cylinder; 103. Top discharge rack; 104. Second cylinder; 105. Middle discharge rack; 106. Bottom discharge rack; 107. Support ring; 108. Dropping inclined plate; 109. Combination frame; 201. Fixed base frame; 202. Reinforcement plate; 203. Fixed spring; 204. First connecting rod; 205. Mounting base frame; 206. Motor bracket; 207. Vibration motor; 208. Second connecting rod; 301. Push rod rack; 302. First hydraulic push rod; 303. Push block; 3 04, hydraulic guide rod; 305, sealing plate; 306, sealing block; 401, unloading hopper; 402, unloading rack; 403, rotating wheel; 404, meshing teeth; 405, meshing wheel; 406, first motor; 407, motor support frame; 501, blanking screen plate; 502, rotating arc plate; 503, separator; 504, positioning rod; 505, rotating ring; 506, first synchronous wheel; 507, second synchronous wheel; 508, second motor; 6101, suction rack; 6102, fan rack; 6103, suction fan; 6104, fixing plate; 6201, fixing strip; 6202, connecting plate; 6203, second hydraulic push rod; 6204, push rod sleeve; 6205, fixing rod; 6206, push rod protective cover. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] A rotary screening device for grain processing, according to Figure 1-10 As shown, it includes a barrel assembly 1 and a vibrating assembly 2 connected to the barrel assembly 1, and also includes a sealing assembly 3 connected to the barrel assembly 1, a rotating assembly 4 movably connected to the barrel assembly 1, a rotating screen plate assembly 5 movably connected inside the barrel assembly 1, and a screening assembly 6 connected to the inner wall of the barrel assembly 1, wherein the sealing assembly 3 is used to seal the top outlet of the barrel assembly 1, and the rotating assembly 4 is used to rotate around the vertical center axis of the barrel assembly 1 and transport the grain into the barrel assembly 1;

[0036] The rotating screen plate assembly 5 comprises a screening assembly movably connected to the inner side of the cylinder assembly 1 and a rotating assembly connected to the screening assembly, and the rotating assembly is used to drive the screening assembly to rotate around the vertical center axis of the cylinder assembly 1;

[0037] The screening assembly includes a blanking screen plate 501 movably connected to the inner side of the cylinder assembly 1, a plurality of rotating arc pieces 502 movably connected to the blanking screen plate 501 through a rotating shaft, and a separator 503 connected to the rotating arc piece 502. The blanking screen plate 501 and the plurality of rotating arc pieces 502 are each provided with a plurality of filter holes. The plurality of rotating arc pieces 502 are arranged in a circle with respect to the vertical center axis of the blanking screen plate 501. A batch of corn kernels and stone mixture is divided into a plurality of groups, and a single group is processed at a time, so as to prevent a large number of errors.

[0038] The screening assembly 6 includes a pulling assembly 62 connected to the inner wall of the cylinder assembly 1 and a suction assembly 61 connected to the pulling assembly 62. The suction assembly 61 is used to apply the same adsorption force to the grain and impurities remaining on the rotating arc plate 502, and the pulling assembly 62 is used to drive the rotating arc plate 502 to rotate around the longitudinal center axis of the blanking screen plate 501.

[0039] The pulling assembly 62 includes a push rod protection cover 6206 connected to the inner wall of the cylinder assembly 1, a fixed rod 6205 rotatably connected to the push rod protection cover 6206, a push rod sleeve 6204 connected to the fixed rod 6205, a second hydraulic push rod 6203 connected to the push rod sleeve 6204, a connecting piece 6202 movably connected to the second hydraulic push rod 6203, and a fixed bar 6201 connected to the connecting piece 6202. The second hydraulic push rod 6203 is extended and retracted to enable the fixed bar 6201 to drive the suction frame 6101 and the rotating arc piece 502 to rotate synchronously.

[0040] The suction assembly 61 includes a fixing plate 6104 connected to the fixing bar 6201, a suction frame 6101 movably connected to the fixing plate 6104, a fan frame 6102 connected to the suction frame 6101, and a suction fan 6103 connected to the fan frame 6102. The upper end surface of the suction frame 6101 is provided with a plurality of through holes. The second hydraulic push rod 6203 is used to drive the suction frame 6101 to support the rotating arc plate 502. By turning on the suction fan 6103, the suction fan 6103 can apply an adsorption force to the corn kernels and stones falling on the rotating arc plate 502, and use the adsorption force to adsorb the corn kernels and stones with the same mass or smaller than the corn kernels, so that they can be tightly attached to the rotating arc plate 502.

[0041] The cylinder assembly 1 includes a second cylinder 104 connected to the vibration assembly 2, a bottom discharge rack 106 connected to the second cylinder 104, a first cylinder 102 connected to the second cylinder 104, a middle discharge rack 105 connected to the first cylinder 102, a support ring 107 connected to the inner wall of the first cylinder 102, a top discharge rack 103 connected to the first cylinder 102, a sealing cover 101 connected to the first cylinder 102, a blanking inclined plate 108 connected to the inner wall of the second cylinder 104, and a combination rack 109 connected to the second cylinder 104. The top discharge rack 103 is provided with a plurality of stone screening holes. The height of the blanking inclined plate 108 is from near the bottom discharge rack 1 06 to gradually rise away from the bottom discharging rack 106, and the corn kernels screened out by the blanking screen plate 501 are discharged from the blanking inclined plate 108 through the bottom discharging rack 106, and the heavy stones accumulated on the rotating arc plate 502 are separated through the middle discharging rack 105. The corn kernels that are not directly screened out by the blanking screen plate 501 and the stones with the same mass or less than the mass of the corn kernels are discharged through the setting of the top discharging rack 103, and the two are screened. The inclined blanking inclined plate 108 can accelerate the efficiency of discharging the corn kernels from the bottom discharging rack 106, and the support ring 107 can also be used to support part of the blanking screen plate 501.

[0042] The rotating assembly includes a second motor 508 connected to the combined frame 109, a second synchronous wheel 507 connected to the output shaft of the second motor 508, a positioning rod 504 movably connected to the combined frame 109, a first synchronous wheel 506 connected to the positioning rod 504, and a rotating ring 505 connected to the positioning rod 504. The second motor 508 can drive the second synchronous wheel 507 to rotate, and drive the first synchronous wheel 506 to rotate through the rotating second synchronous wheel 507, so as to drive the positioning rod 504 to rotate through the first synchronous wheel 506, and drive the blanking screen plate 501 to rotate through the rotating positioning rod 504, and at the same time, the rotating blanking screen plate 501 synchronously drives multiple rotating arc pieces 502 placed on the upper end of the support ring 107 and the suction frame 6101 to rotate around the longitudinal center axis of the blanking screen plate 501.

[0043] The positioning rod 504 is fixedly connected to the blanking screen plate 501 , the first synchronous wheel 506 is meshed with the second synchronous wheel 507 , the second motor 508 is used to drive the blanking screen plate 501 to rotate around the vertical center axis of the positioning rod 504 , and the rotating ring 505 is rotationally connected to the blanking inclined plate 108 .

[0044] The sealing assembly 3 includes a push rod frame 301 connected to the sealing cover 101, a first hydraulic push rod 302 connected to the push rod frame 301, a push block 303 connected to the first hydraulic push rod 302, a hydraulic guide rod 304 connected to the front and rear sections of the push rod frame 301, a sealing plate 305 slidably connected to the hydraulic guide rod 304, and a sealing block 306 connected to the sealing plate 305. The push block 303 is fixedly connected to the sealing plate 305, and the push block 303 is driven to move by the first hydraulic push rod 302, so that the sealing plate 305 connected to the push block 303 is The movable sealing plate 305 can slide on the hydraulic guide rod 304, and drive the sealing block 306 to separate from the first cylinder 102, so that the corn kernels that are not directly screened out by the material-dropping screen plate 501 and the stones with the same mass as or less than the mass of the corn kernels can be discharged from the rotating arc plate 502. At the same time, because the stones with the same mass as the corn kernels are often much smaller than the corn kernels, the fine stones are separated from the corn kernels through the stone screening holes provided on the top discharge rack 103 to obtain pure corn kernels, thereby realizing the screening of the fine stones and corn kernels.

[0045] The vibration assembly 2 includes a fixed base frame 201 connected to the second cylinder 104, a plurality of reinforcing plates 202 connected to the fixed base frame 201, a plurality of second connecting rods 208 connected to the fixed base frame 201, a fixed spring 203 connected to the second connecting rod 208, a first connecting rod 204 connected to the fixed spring 203, a mounting base frame 205 connected to the first connecting rod 204, a motor bracket 206 connected to the mounting base frame 205, and a vibration motor 207 connected to the motor bracket 206. The first connecting rod 204 and the second connecting rod 208 are arranged in a one-to-one correspondence. The mounting base frame 205 is driven to vibrate by the vibration motor 207, and it is transmitted to the fixed base frame 201 and the cylinder assembly 1 through the fixed spring 203.

[0046] The rotating assembly 4 includes a rotating wheel 403 rotatably connected to the sealing cover 101, a discharge rack 402 connected to the inside of the rotating wheel 403, a discharge hopper 401 connected to the discharge rack 402, a plurality of meshing teeth 404 connected to the rotating wheel 403, a motor support frame 407 fixed to the sealing cover 101, a first motor 406 connected to the motor support frame 407, and a meshing wheel 405 connected to the output shaft of the first motor 406. The meshing wheel 405 is driven to rotate by the first motor 406, and the rotating meshing wheel 405 drives the rotating wheel 403 to rotate synchronously, and the rotating rotating wheel 403 drives the discharge rack 402 to rotate synchronously, so that the corn kernels and stone mixture entering from the discharge hopper 401 can be evenly distributed on the discharge screen plate 501.

[0047] The meshing wheel 405 meshes with the meshing teeth 404 . The first motor 406 is used to drive the unloading rack 402 to rotate around the vertical center axis of the positioning rod 504 . The meshing wheel 405 is rotatably connected to the sealing cover 101 .

[0048] The whole process can make a part of the corn kernels and gravel mixture move faster on the conical screen plate due to gravity, while the corn kernels and gravel mixture that are not directly screened out by the screen plate can be screened at the discharge port at the edge of the conical screen, thereby preventing the corn kernels and gravel mixture from being directly discharged from the discharge port, thereby improving the screening efficiency of the entire screening device.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A rotary screening device for grain processing, comprising a barrel assembly (1) and a vibrating assembly (2) connected to the barrel assembly (1), characterized in that: It also comprises a sealing assembly (3) connected to the barrel assembly (1), a rotating assembly (4) movably connected to the barrel assembly (1), a rotating screen plate assembly (5) movably connected inside the barrel assembly (1), and a screening assembly (6) connected to the inner wall of the barrel assembly (1), wherein the sealing assembly (3) is used to seal the top outlet of the barrel assembly (1), and the rotating assembly (4) is used to rotate around the vertical center axis of the barrel assembly (1) and transport grain into the barrel assembly (1); The rotating screen plate assembly (5) comprises a screening assembly movably connected to the inner side of the cylinder assembly (1) and a rotating assembly connected to the screening assembly, wherein the rotating assembly is used to drive the screening assembly to rotate around the vertical center axis of the cylinder assembly (1); The screening assembly comprises a blanking screen plate (501) movably connected to the inner side of the cylinder assembly (1), a plurality of rotating arc plates (502) movably connected to the blanking screen plate (501) via a rotating shaft, and a separator (503) connected to the rotating arc plates (502), the blanking screen plate (501) and the plurality of rotating arc plates (502) are both provided with a plurality of filter holes, and the plurality of rotating arc plates (502) are arranged in a circle around the vertical center axis of the blanking screen plate (501); The screening assembly (6) comprises a pulling assembly (62) connected to the inner wall of the cylinder assembly (1) and a suction assembly (61) connected to the pulling assembly (62), wherein the suction assembly (61) is used to apply the same adsorption force to the grain and impurities remaining on the rotating arc plate (502), and the pulling assembly (62) is used to drive the rotating arc plate (502) to rotate around the longitudinal center axis of the blanking screen plate (501).

2. A rotary screening device for grain processing according to claim 1, characterized in that: The pulling assembly (62) comprises a push rod protection cover (6206) connected to the inner wall of the cylinder assembly (1), a fixed rod (6205) rotatably connected to the push rod protection cover (6206), a push rod sleeve (6204) connected to the fixed rod (6205), a second hydraulic push rod (6203) connected to the push rod sleeve (6204), a connecting plate (6202) movably connected to the second hydraulic push rod (6203), and a fixing strip (6201) connected to the connecting plate (6202).

3. A rotary screening device for grain processing according to claim 2, characterized in that: The suction assembly (61) includes a fixing plate (6104) connected to the fixing bar (6201), a suction frame (6101) movably connected to the fixing plate (6104), a fan frame (6102) connected to the suction frame (6101), and a suction fan (6103) connected to the fan frame (6102); a plurality of through holes are provided on the upper end surface of the suction frame (6101); and the second hydraulic push rod (6203) is used to drive the suction frame (6101) to support the rotating arc plate (502).

4. A rotary screening device for grain processing according to claim 1, characterized in that: The cylinder assembly (1) comprises a second cylinder (104) connected to the vibration assembly (2), a bottom discharge rack (106) connected to the second cylinder (104), a first cylinder (102) connected to the second cylinder (104), a middle discharge rack (105) connected to the first cylinder (102), a support ring (107) connected to the inner wall of the first cylinder (102), a top discharge rack (103) connected to the first cylinder (102), a sealing cover (101) connected to the first cylinder (102), a material dropping inclined plate (108) connected to the inner wall of the second cylinder (104), and a combination rack (109) connected to the second cylinder (104), wherein the top discharge rack (103) is provided with a plurality of stone screening holes, and the height of the material dropping inclined plate (108) gradually increases from close to the bottom discharge rack (106) to far away from the bottom discharge rack (106).

5. A rotary screening device for grain processing according to claim 4, characterized in that: The rotating assembly comprises a second motor (508) connected to the assembly frame (109), a second synchronous wheel (507) connected to the output shaft of the second motor (508), a positioning rod (504) movably connected to the assembly frame (109), a first synchronous wheel (506) connected to the positioning rod (504), and a rotating ring (505) connected to the positioning rod (504).

6. A rotary screening device for grain processing according to claim 5, characterized in that: The positioning rod (504) is fixedly connected to the blanking screen plate (501), the first synchronous wheel (506) is meshed with the second synchronous wheel (507), the second motor (508) is used to drive the blanking screen plate (501) to rotate around the vertical center axis of the positioning rod (504), and the rotating ring (505) is rotationally connected to the blanking inclined plate (108).

7. A rotary screening device for grain processing according to claim 4, characterized in that: The sealing assembly (3) comprises a push rod frame (301) connected to the sealing cover (101), a first hydraulic push rod (302) connected to the push rod frame (301), a push block (303) connected to the first hydraulic push rod (302), a hydraulic guide rod (304) connected to the front and rear sections of the push rod frame (301), a sealing plate (305) slidably connected to the hydraulic guide rod (304), and a sealing block (306) connected to the sealing plate (305), wherein the push block (303) is fixedly connected to the sealing plate (305).

8. A rotary screening device for grain processing according to claim 4, characterized in that: The vibration component (2) comprises a fixed base frame (201) connected to the second cylinder (104), a plurality of reinforcing plates (202) connected to the fixed base frame (201), a plurality of second connecting rods (208) connected to the fixed base frame (201), a fixed spring (203) connected to the second connecting rod (208), a first connecting rod (204) connected to the fixed spring (203), a mounting base frame (205) connected to the first connecting rod (204), a motor bracket (206) connected to the mounting base frame (205), and a vibration motor (207) connected to the motor bracket (206), wherein the first connecting rod (204) and the second connecting rod (208) are arranged in a one-to-one correspondence.

9. A rotary screening device for grain processing according to claim 4, characterized in that: The rotating assembly (4) comprises a rotating wheel (403) rotatably connected to the sealing cover (101), a material discharge rack (402) connected to the inside of the rotating wheel (403), a material discharge hopper (401) connected to the material discharge rack (402), a plurality of meshing teeth (404) connected to the rotating wheel (403), a motor support frame (407) fixedly connected to the sealing cover (101), a first motor (406) connected to the motor support frame (407), and a meshing wheel (405) connected to the output shaft of the first motor (406).

10. A rotary screening device for grain processing according to claim 9, characterized in that: The meshing wheel (405) meshes with the meshing teeth (404), the first motor (406) is used to drive the unloading rack (402) to rotate around the vertical center axis of the positioning rod (504), and the meshing wheel (405) is rotatably connected to the sealing cover (101).

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