Rapid grain grading screen for food processing

Abstract

The invention relates to the technical field of grain processing, in particular to a food processing grain fast grading screening screen which comprises a screening main machine shell, and a first-stage screening conveying net, a second-stage screening conveying net and a third-stage screening conveying net are longitudinally arranged on the inner side of the screening main machine shell. First chains are fixedly connected to the two ends of the first-stage screening conveying net, the two ends of the second-stage screening conveying net and the two ends of the third-stage screening conveying net correspondingly, the screening main machine shell communicates with the interiors of the aggregate discharging hopper, the discharging pipe, the dust removal connecting shell and the feeding connecting box, and a dust removal mechanism is arranged at the end, away from the screening main machine shell, of the dust removal connecting shell. A feeding mechanism is arranged at the end, away from the screening main machine shell, of the feeding connecting box, a chain wheel mechanism is arranged on the inner side of the screening main machine shell, through the continuous operation mode that conveying and grading filtering are conducted at the same time, the problem that materials are prone to being stacked in traditional centralized screening can be effectively solved, and multi-stage screening is completed while stable conveying of the materials is achieved; and the screening efficiency is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of grain processing technology, and more specifically, to a rapid grading and screening method for grains used in food processing. Background Technology

[0002] Food-processed grains are natural grains such as rice, wheat, corn, oats, millet, sorghum, and various miscellaneous grains. They undergo a series of industrial or refined processes, including cleaning, hulling, milling, flaking, steaming, puffing, drying, roasting, or blending modification, to form grain raw materials, semi-finished products, and finished products suitable for food production. After standardized processing, impurities and inedible parts are removed, and the taste, stability, and processing characteristics are improved. These grains are widely used in rice and flour products, baked goods, convenience foods, meal replacement foods, infant complementary foods, and various deep-processed grain products, and are an important basic raw material and processed product category in the food processing field.

[0003] Grain rapid grading and screening equipment is used for rapid grading and screening of grains, mainly for food processing grains such as rice, wheat, corn, and miscellaneous grains. Through a combination of multi-layer screens, vibration, air force, or drums, it can quickly separate and grade grains of different sizes, plumpness, and impurities. It can complete the processes of impurity removal, coarse selection, fine selection, and grading in one go, improving screening efficiency and grading accuracy. It is suitable for production links such as grain processing and food raw material pretreatment, and belongs to grain cleaning and grading equipment in food processing machinery.

[0004] When using the above technology, the following technical problems were found in the existing technology: Most existing grain screening equipment adopts a centralized screening structure. The material is fed into the screen surface at one time for screening, which easily leads to problems such as material accumulation and insufficient screening, resulting in low screening efficiency and poor grading accuracy.

[0005] Based on this, the present invention discloses a rapid grading and screening method for grains used in food processing. Summary of the Invention

[0006] To address the issues raised in the background section, existing grain screening equipment often employs a centralized screening structure, where material is fed onto the screen surface all at once, leading to problems such as material accumulation and insufficient screening, resulting in low screening efficiency and poor grading accuracy. This invention provides a rapid grading and screening system for food-processed grains, comprising a screening main unit housing. The inner side of the screening main unit housing is longitudinally arranged with a primary screening conveyor network, a secondary screening conveyor network, and a tertiary screening conveyor network. Each end of the primary, secondary, and tertiary screening conveyor networks is fixedly connected to a first chain. A material collection hopper is fixedly connected to the lower end of the screening main body housing, and a discharge pipe is fixedly connected to the lower end of the material collection hopper. A dust removal connecting shell is fixedly connected to the middle of the upper end of the screening main body housing, and a feeding connecting box is fixedly connected to the upper end of the screening main body housing. The screening main body housing, the material collection hopper, the discharge pipe, the dust removal connecting shell, and the feeding connecting box are internally interconnected. A dust removal mechanism is provided at the end of the dust removal connecting shell away from the screening main body housing, and a feeding mechanism is provided at the end of the feeding connecting box away from the screening main body housing. A sprocket mechanism is provided on the inner side of the screening main body housing.

[0007] As a further improvement to this technical solution, the sprocket mechanism includes a primary driving sprocket shaft, a primary driven sprocket shaft, a secondary driving sprocket shaft, a secondary driven sprocket shaft, a tertiary driving sprocket shaft, a tertiary driven sprocket shaft, and sealed sprockets. The primary screening conveyor network has primary driving and driven sprocket shafts symmetrically arranged at both ends. The secondary screening conveyor network has secondary driving and driven sprocket shafts symmetrically arranged at both ends. The tertiary screening conveyor network has tertiary driving and driven sprocket shafts symmetrically arranged at both ends. All the primary driving, driven, secondary driving, secondary driven, tertiary driving, and tertiary driven sprocket shafts are rotatably connected to the screening main unit housing and have sealed sprockets fixedly connected to both ends. The multiple sealed sprockets respectively mesh with the corresponding first chain drive.

[0008] As a further improvement to this technical solution, the feeding mechanism includes a feeder housing, a hopper, and a screw feed shaft. The upper end of the feeding connection box is fixedly connected to the feeder housing, and the screw feed shaft is rotatably connected to the inner side of the feeder housing. The upper end of the feeder housing is fixedly connected to the hopper. The feed connection box, the feeder housing, and the hopper are interconnected. A linkage assembly is provided between the screw feed shaft and the primary driven sprocket shaft. As a further improvement to this technical solution, the dust removal mechanism includes a dust removal connecting hose and a dust removal fan. The dust removal connecting hose is fixedly connected to the end of the dust removal connecting shell away from the screening host housing. A dust removal fan is provided on the outside of the screening host housing. The end of the dust removal connecting hose away from the dust removal connecting shell is fixedly connected to the dust removal fan.

[0009] As a further improvement to this technical solution, the linkage assembly includes a reducer body, a reducer input sprocket, a linkage sprocket, and a linkage transmission chain. The reducer body is fixedly connected to the end of the feeder housing. The end of the screw feed shaft near the reducer body passes through the feeder housing and is fixedly connected to the output end of the screw feed shaft. The reducer input sprocket is fixedly connected to the input end of the reducer body. One end of the primary driven sprocket shaft passes through the screening host housing and is fixedly connected to the linkage sprocket. The linkage sprocket and the outer side of the reducer input sprocket are meshed by a linkage transmission chain.

[0010] As a further improvement to this technical solution, the sprocket mechanism further includes a primary transmission sprocket, a secondary transmission sprocket, a primary transmission chain, a tertiary transmission sprocket, a secondary synchronous sprocket, and a secondary transmission chain. One end of the primary drive sprocket shaft passes through the screening main unit housing and is fixedly connected to the primary transmission sprocket. One end of the secondary drive sprocket shaft passes through the screening main unit housing and is fixedly connected to the secondary transmission sprocket and the secondary synchronous sprocket. The outer sides of the primary and secondary transmission sprockets are engaged with a primary transmission chain. One end of the tertiary drive sprocket shaft passes through the screening main unit housing and is fixedly connected to the tertiary transmission sprocket. The outer sides of the tertiary transmission sprocket and the secondary synchronous sprocket are engaged with a secondary transmission chain.

[0011] As a further improvement to this technical solution, a motor bracket is fixedly connected to the end of the screening host housing away from the primary drive sprocket, a servo motor is fixedly connected to the upper end of the motor bracket, and the output end of the servo motor is fixedly connected to the shaft of the third-stage drive sprocket.

[0012] As a further improvement to this technical solution, multiple sets of sealing plates are symmetrically arranged on the inner side of the screening host housing. A fixing plate is fixedly connected to one end of the sealing plate near the screening host housing, and the fixing plate is fixedly connected to the screening host housing.

[0013] As a further improvement to this technical solution, a guide plate is fixedly connected longitudinally to the inner side of the screening host housing, and a baffle plate is fixedly connected to the end of the guide plate.

[0014] As a further improvement to this technical solution, a storage bin is fixedly connected to the upper end of the feeding hopper.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this rapid grading and screening process for grains in food processing, the continuous operation of conveying and grading / filtering simultaneously can effectively avoid the problem of material accumulation that is prone to occur in traditional centralized screening. It can achieve stable material conveying while completing multi-stage screening, significantly improving screening efficiency.

[0016] 2. In this rapid grading and screening of grains for food processing, the material stored in the hopper and storage bin is smoothly transported to the inside of the feeding connection box by the screw feeder shaft, and then sent into the screening host housing by the feeding connection box for screening. This eliminates the intermediate material transfer link, simplifies the feeding process, and realizes direct and continuous conveying of materials from storage to screening.

[0017] 3. In this rapid grading and screening of grains for food processing, the linkage component enables the simultaneous start and stop of the screw feeding shaft and the primary screening conveyor. This effectively prevents the screw feeding shaft from running prematurely before the primary screening conveyor starts, thus preventing the material from accumulating and stagnating at the lower end of the feed connection box and causing channel blockage due to the screw feeding shaft rotating to feed material before the primary screening conveyor has started screening. This ensures that the feeding and screening actions are synchronized, coordinated, continuous, and smooth. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional structural schematic diagram of the screening main unit housing of the present invention; Figure 3 This is a schematic diagram of the structure of the primary screening conveyor, the secondary screening conveyor, and the tertiary screening conveyor of the present invention; Figure 4 This is a schematic diagram of the structure of the primary transmission chain and the secondary transmission chain of the present invention; Figure 5 This is a schematic diagram of the linkage component of the present invention; Figure 6 This is a schematic diagram of the structure of the first chain of the present invention; Figure 7 This is a structural schematic diagram of the sealing plate installation position according to the present invention; Figure 8 This is a schematic diagram of the structure of the fixing plate of the present invention; Figure 9 This is a schematic diagram of the structure of the guide plate and storage bin of the present invention; Figure 10 This is a schematic diagram of the cross-section of the guide plate and the storage bin of the present invention.

[0019] The meanings of the labels in the diagram are as follows: 1. Screening main unit housing; 2. Primary screening conveyor mesh; 3. Secondary screening conveyor mesh; 4. Tertiary screening conveyor mesh; 5. First chain; 6. Material collection and discharge hopper; 7. Discharge pipe; 9. Dust collector connecting shell; 10. Feed connecting box; 11. Primary drive sprocket shaft; 12. Primary driven sprocket shaft; 13. Secondary drive sprocket shaft; 14. Secondary driven sprocket shaft; 15. Tertiary drive sprocket shaft; 16. Tertiary driven sprocket shaft; 17. Sealed sprocket; 18. Feeder housing; 19. Feed hopper; 20. Screw 21. Rotary feeding shaft; 22. Dust removal connecting hose; 23. Dust removal fan; 24. Reducer body; 25. Reducer input sprocket; 26. Linkage sprocket; 27. Linkage transmission chain; 28. Primary transmission sprocket; 29. ​​Secondary transmission sprocket; 30. Primary transmission chain; 31. Tertiary transmission sprocket; 32. Secondary synchronous sprocket; 33. Secondary transmission chain; 34. Motor bracket; 35. Servo motor; 36. Sealing plate; 37. Fixing plate; 38. Baffle plate; 39. Storage bin. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the embodiments of the present invention can be combined with each other.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Example

[0023] like Figures 1-10As shown, the system includes a screening main unit housing 1. A primary screening conveyor network 2, a secondary screening conveyor network 3, and a tertiary screening conveyor network 4 are longitudinally arranged on the inner side of the screening main unit housing 1. A first chain 5 is fixedly connected to both ends of each of the primary, secondary, and tertiary screening conveyor networks 2, 3, and 4. A material collection and discharge hopper 6 is fixedly connected to the lower end of the screening main unit housing 1. A discharge pipe 7 is fixedly connected to the lower end of the material collection and discharge hopper 6. A dust removal connecting shell 9 is fixedly connected to the middle of the upper end of the screening main unit housing 1. A feeding connecting box 10 is fixedly connected to the upper end of the screening main unit housing 1. The screening main unit housing 1 is internally interconnected with the material collection and discharge hopper 6, the discharge pipe 7, the dust removal connecting shell 9, and the feeding connecting box 10. A dust removal mechanism is provided at the end of the dust removal connecting shell 9 away from the screening main unit housing 1. A feeding mechanism is provided at the end of the feeding connecting box 10 away from the screening main unit housing 1. A sprocket mechanism is provided on the inner side of the screening main unit housing 1.

[0024] The sprocket mechanism includes a primary drive sprocket shaft 11, a primary driven sprocket shaft 12, a secondary drive sprocket shaft 13, a secondary driven sprocket shaft 14, a tertiary drive sprocket shaft 15, a tertiary driven sprocket shaft 16, and a sealed sprocket 17. The primary screening conveyor 2 has a primary drive sprocket shaft 11 and a primary driven sprocket shaft 12 symmetrically arranged at both ends. The secondary screening conveyor 3 has a secondary drive sprocket shaft 13 and a secondary driven sprocket shaft 14 symmetrically arranged at both ends. The tertiary screening conveyor 4 has a tertiary drive sprocket shaft 15 and a tertiary driven sprocket shaft 16 symmetrically arranged at both ends. The primary drive sprocket shaft 11, the primary driven sprocket shaft 12, the secondary drive sprocket shaft 13, the secondary driven sprocket shaft 14, the tertiary drive sprocket shaft 15, and the tertiary driven sprocket shaft 16 are all rotatably connected to the screening main housing 1 and have a sealed sprocket 17 fixedly connected to both ends. The multiple sealed sprockets 17 are respectively engaged with the corresponding first chain 5.

[0025] The sprocket mechanism further includes a primary drive sprocket 27, a secondary drive sprocket 28, a primary drive chain 29, a tertiary drive sprocket 30, a secondary synchronous sprocket 31, and a secondary drive chain 32. One end of the primary drive sprocket shaft 11 passes through the screening main housing 1 and is fixedly connected to the primary drive sprocket 27. One end of the secondary drive sprocket shaft 13 passes through the screening main housing 1 and is fixedly connected to the secondary drive sprocket 28 and the secondary synchronous sprocket 31. The primary drive sprocket 27 and the secondary drive sprocket 28 are meshed with the primary drive chain 29 on their outer sides. One end of the tertiary drive sprocket shaft 15 passes through the screening main housing 1 and is fixedly connected to the tertiary drive sprocket 30. The tertiary drive sprocket 30 and the secondary synchronous sprocket 31 are meshed with the secondary drive chain 32 on their outer sides.

[0026] A motor bracket 33 is fixedly connected to the end of the screening main housing 1 away from the primary transmission sprocket 27. A servo motor 34 is fixedly connected to the upper end of the motor bracket 33. The output end of the servo motor 34 is fixedly connected to the third-stage drive sprocket shaft 15.

[0027] Multiple sets of sealing plates 35 are symmetrically arranged on the inner side of the screening main housing 1. A fixing plate 36 is fixedly connected to one end of the sealing plate 35 near the screening main housing 1. The fixing plate 36 is fixedly connected to the screening main housing 1.

[0028] A guide plate 38 is fixedly connected longitudinally to the inner side of the screening main housing 1, and a baffle plate 37 is fixedly connected to the end of the guide plate 38.

[0029] During operation, the servo motor 34 is started, and the output of the servo motor 34 drives the third-stage drive sprocket shaft 15 to rotate. When the third-stage drive sprocket shaft 15 rotates, it drives the third-stage transmission sprocket 30 on its outer side to rotate synchronously. Then, through the second-stage transmission chain 32, it drives the second-stage synchronous sprocket 31 to rotate synchronously. The rotation of the second-stage synchronous sprocket 31 in turn drives the second-stage drive sprocket shaft 13 to rotate synchronously, so that the second-stage drive sprocket shaft 13 drives the second-stage transmission sprocket 28 on its outer side to rotate synchronously. When the second-stage transmission sprocket 28 rotates, it drives the first-stage transmission sprocket 27 to rotate synchronously through the first-stage transmission chain 29, and finally realizes the synchronous rotation of the first-stage drive sprocket shaft 11. When the primary drive sprocket shaft 11, the secondary drive sprocket shaft 13, and the tertiary drive sprocket shaft 15 rotate synchronously, they drive their respective corresponding sealed sprockets 17 to rotate synchronously. Since the sealed sprockets 17 mesh with the first chain 5, the multiple first chains 5 drive the corresponding primary driven sprocket shaft 12, the secondary driven sprocket shaft 14, and the tertiary driven sprocket shaft 16 to rotate synchronously, thereby realizing the synchronous operation of the primary screening conveyor network 2, the secondary screening conveyor network 3, and the tertiary screening conveyor network 4 inside the screening main housing 1.

[0030] After the primary screening conveyor 2, the secondary screening conveyor 3, and the tertiary screening conveyor 4 all enter the rotating state, the material is conveyed through the feed connection box 10 to the inside of the screening host housing 1, and the primary screening conveyor 2, the secondary screening conveyor 3, and the tertiary screening conveyor 4 work together to complete the grading and screening operation of the material. When the material falls sequentially onto the primary screening conveyor 2, the secondary screening conveyor 3, and the tertiary screening conveyor 4, the screening process is as follows: First, the material is initially screened through the screen holes on the primary screening conveyor 2. The material with particles smaller than the screen holes of the primary screening conveyor 2 passes through the screen holes and falls into the upper end of the secondary screening conveyor 3. The material with larger particles that cannot pass through remains in the upper end of the primary screening conveyor 2 and is conveyed to one end of the guide plate 38 along with the primary screening conveyor 2. The material falling into the upper end of the secondary screening conveyor 3 continues to be screened. The material that can pass through the screen holes of the secondary screening conveyor 3 falls into the upper end of the tertiary screening conveyor 4, and the material that cannot pass through is conveyed to one end of the guide plate 38 along with the secondary screening conveyor 3. The material falling on the upper end of the three-stage screening conveyor 4 undergoes final screening. Material particles smaller than the screen holes of the three-stage screening conveyor 4 pass through the screen holes and fall into the collection discharge hopper 6, and enter the subsequent process through the discharge pipe 7; material that cannot pass through the screen holes of the three-stage screening conveyor 4 is conveyed to one end of the guide plate 38 along with the three-stage screening conveyor 4. This continuous operation method of conveying and grading simultaneously can effectively avoid the problem of material accumulation that is prone to occur in traditional centralized screening. It can achieve stable material conveying while completing multi-stage screening, significantly improving screening efficiency. Example

[0031] like Figures 1-5 As shown, The feeding mechanism includes a feeder housing 18, a hopper 19, and a screw feeder shaft 20. The upper end of the feeder connecting box 10 is fixedly connected to the feeder housing 18, and the screw feeder shaft 20 is rotatably connected to the inner side of the feeder housing 18. The upper end of the feeder housing 18 is fixedly connected to the hopper 19. The feeder connecting box 10, the feeder housing 18, and the hopper 19 are interconnected. A linkage assembly is provided between the screw feeder shaft 20 and the primary driven sprocket shaft 12. The upper end of the feeding hopper 19 is fixedly connected to the storage bin 39.

[0032] During operation, materials are first stored in the storage bin 39. When screening is required, the primary screening conveyor 2, the secondary screening conveyor 3, and the tertiary screening conveyor 4 are activated. Then, the screw feed shaft 20 is rotated to smoothly transport the materials stored in the hopper 19 and the storage bin 39 to the inside of the feed connection box 10. The materials are then fed into the screening host housing 1 by the feed connection box 10 for screening. This eliminates the need for additional material transfer in the middle, simplifies the feeding process, and enables direct and continuous material transport from storage to screening. Example

[0033] like Figures 3-5As shown, the linkage assembly includes a reducer body 23, a reducer input sprocket 24, a linkage sprocket 25, and a linkage transmission chain 26. The reducer body 23 is fixedly connected to the end of the feeder housing 18. The end of the screw feed shaft 20 near the reducer body 23 passes through the feeder housing 18 and is fixedly connected to the output end of the screw feed shaft 20. The input end of the reducer body 23 is fixedly connected to the reducer input sprocket 24. One end of the first-stage driven sprocket shaft 12 passes through the screening main housing 1 and is fixedly connected to the linkage sprocket 25. The linkage sprocket 25 and the outer side of the reducer input sprocket 24 are meshed by the linkage transmission chain 26.

[0034] During operation, when the primary driven sprocket shaft 12 rotates, it drives the reducer input sprocket 24 to rotate synchronously through the linkage sprocket 25 and the linkage transmission chain 26; the reducer input sprocket 24 transmits torque to the input end of the reducer body 23, and after being reduced by the reducer body 23, it drives the screw feed shaft 20 to rotate through its output end; The above process enables the screw feed shaft 20 and the primary screening conveyor 2 to start and stop in tandem, effectively preventing the screw feed shaft 20 from running prematurely before the primary screening conveyor 2 starts. This prevents the material from accumulating and stagnating at the lower end of the feed connection box 10 and causing channel blockage due to the screw feed shaft 20 rotating to feed material before the primary screening conveyor 2 has started screening. This ensures that the feeding and screening actions are synchronized, coordinated, continuous and smooth. Example

[0035] like Figure 1 As shown, the dust removal mechanism includes a dust removal connecting hose 21 and a dust removal fan 22. The dust removal connecting shell 9 is fixedly connected to the end away from the screening host housing 1 with the dust removal connecting hose 21. The dust removal fan 22 is provided on the outside of the screening host housing 1. The end of the dust removal connecting hose 21 away from the dust removal connecting shell 9 is fixedly connected to the dust removal fan 22.

[0036] During operation, before starting the primary screening conveyor 2, start the dust removal fan 22, and effectively reduce the problem of flying dust inside the screening host housing 1 through the dust removal connecting hose 21 and the dust removal connecting shell 9.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rapid grain grading and screening system for food processing, comprising a screening main unit housing (1), characterized in that: The inner side of the screening main body housing (1) is longitudinally arranged with a primary screening conveyor network (2), a secondary screening conveyor network (3), and a tertiary screening conveyor network (4). A first chain (5) is fixedly connected to both ends of each of the primary screening conveyor network (2), secondary screening conveyor network (3), and tertiary screening conveyor network (4). A material collection hopper (6) is fixedly connected to the lower end of the screening main body housing (1), and a discharge pipe (7) is fixedly connected to the lower end of the material collection hopper (6). A material discharge pipe (7) is fixedly connected to the middle of the upper end of the screening main body housing (1). The dust removal connecting shell (9) is fixedly connected to the upper end of the screening host housing (1). The screening host housing (1) is internally connected to the material collection hopper (6), the discharge pipe (7), the dust removal connecting shell (9), and the feeding connecting box (10). A dust removal mechanism is provided at the end of the dust removal connecting shell (9) away from the screening host housing (1). A feeding mechanism is provided at the end of the feeding connecting box (10) away from the screening host housing (1). A sprocket mechanism is provided on the inner side of the screening host housing (1).

2. The rapid grading and screening method for grains in food processing according to claim 1, characterized in that: The sprocket mechanism includes a primary drive sprocket shaft (11), a primary driven sprocket shaft (12), a secondary drive sprocket shaft (13), a secondary driven sprocket shaft (14), a tertiary drive sprocket shaft (15), a tertiary driven sprocket shaft (16), and a sealed sprocket (17). The primary screening conveyor (2) has a primary drive sprocket shaft (11) and a primary driven sprocket shaft (12) symmetrically arranged at both ends. The secondary screening conveyor (3) has a secondary drive sprocket shaft (13) and a secondary driven sprocket shaft (14) symmetrically arranged at both ends. The three-stage screening conveyor network (4) is symmetrically provided with a three-stage driving sprocket shaft (15) and a three-stage driven sprocket shaft (16) at both ends. The first-stage driving sprocket shaft (11), the first-stage driven sprocket shaft (12), the second-stage driving sprocket shaft (13), the second-stage driven sprocket shaft (14), the third-stage driving sprocket shaft (15), and the third-stage driven sprocket shaft (16) are all rotatably connected to the screening host housing (1) and are fixedly connected to sealed sprockets (17) at both ends. The multiple sealed sprockets (17) are respectively driven and meshed with the corresponding first chain (5).

3. The rapid grading and screening method for grains in food processing according to claim 2, characterized in that: The feeding mechanism includes a feeder housing (18), a hopper (19), and a screw feed shaft (20). The upper end of the feeder connection box (10) is fixedly connected to the feeder housing (18). The screw feed shaft (20) is rotatably connected to the inner side of the feeder housing (18). The upper end of the feeder housing (18) is fixedly connected to the hopper (19). The feeder connection box (10), the feeder housing (18), and the hopper (19) are interconnected. A linkage component is provided between the screw feed shaft (20) and the first-stage driven sprocket shaft (12).

4. The rapid grading and screening method for grains in food processing according to claim 1, characterized in that: The dust removal mechanism includes a dust removal connecting hose (21) and a dust removal fan (22). The dust removal connecting shell (9) is fixedly connected to the end away from the screening host housing (1). The dust removal fan (22) is provided on the outside of the screening host housing (1). The end of the dust removal connecting hose (21) away from the dust removal connecting shell (9) is fixedly connected to the dust removal fan (22).

5. The rapid grading and screening method for grains in food processing according to claim 3, characterized in that: The linkage assembly includes a reducer body (23), a reducer input sprocket (24), a linkage sprocket (25), and a linkage transmission chain (26). The reducer body (23) is fixedly connected to the end of the feeder housing (18). The end of the screw feed shaft (20) near the reducer body (23) passes through the feeder housing (18) and is fixedly connected to the output end of the screw feed shaft (20). The reducer input sprocket (24) is fixedly connected to the input end of the reducer body (23). One end of the first-stage driven sprocket shaft (12) passes through the screening host housing (1) and is fixedly connected to the linkage sprocket (25). The linkage sprocket (25) and the outer side of the reducer input sprocket (24) are engaged by the linkage transmission chain (26).

6. The rapid grading and screening method for grains in food processing according to claim 2, characterized in that: The sprocket mechanism also includes a primary transmission sprocket (27), a secondary transmission sprocket (28), a primary transmission chain (29), a tertiary transmission sprocket (30), a secondary synchronous sprocket (31), and a secondary transmission chain (32). One end of the primary drive sprocket shaft (11) passes through the screening main machine housing (1) and is fixedly connected to the primary transmission sprocket (27). One end of the secondary drive sprocket shaft (13) passes through the screening main machine housing (1) and is fixedly connected to the secondary transmission sprocket (28) and the secondary synchronous sprocket (31). The primary transmission sprocket (27) and the secondary transmission sprocket (28) are meshed with the primary transmission chain (29) on their outer sides. One end of the tertiary drive sprocket shaft (15) passes through the screening main machine housing (1) and is fixedly connected to the tertiary transmission sprocket (30). The tertiary transmission sprocket (30) and the secondary synchronous sprocket (31) are meshed with the secondary transmission chain (32) on their outer sides.

7. The rapid grading and screening method for grains in food processing according to claim 2, characterized in that: The end of the screening host housing (1) away from the first-stage transmission sprocket (27) is fixedly connected to a motor bracket (33), and the upper end of the motor bracket (33) is fixedly connected to a servo motor (34). The output end of the servo motor (34) is fixedly connected to the third-stage drive sprocket shaft (15).

8. The rapid grading and screening method for grains in food processing according to claim 1, characterized in that: Multiple sets of sealing plates (35) are symmetrically arranged on the inner side of the screening host housing (1). A fixing plate (36) is fixedly connected to one end of the sealing plate (35) near the screening host housing (1). The fixing plate (36) is fixedly connected to the screening host housing (1).

9. The rapid grading and screening method for grains in food processing according to claim 1, characterized in that: A guide plate (38) is fixedly connected longitudinally to the inner side of the screening host housing (1), and a baffle plate (37) is fixedly connected to the end of the guide plate (38).

10. A rapid grading and screening method for grains in food processing according to claim 3, characterized in that: The upper end of the feeding hopper (19) is fixedly connected to the storage bin (39).

Images