A high-efficiency screening device for flour processing

Abstract

The application discloses a high-efficiency screening device for flour processing, and belongs to the technical field of flour screening. The device mainly comprises a sealed screening cabin, multiple screening cylinders with different mesh sizes are sequentially arranged in the sealed screening cabin from left to right, a driving gear ring is arranged at the connecting position of the multiple screening cylinders, two symmetrical spiral pushing strips are arranged in each screening cylinder, and multiple scattering strips are equidistantly arranged along the spiral direction between the two spiral pushing strips. The screening cylinder, the spiral pushing strip, the scattering strip and the discharge hopper are arranged, so that the contact rate of the material screening surface is improved by efficiently scattering the agglomerates, the flour yield and the raw material utilization rate are improved, the flour can be classified and screened conveniently, the vacuum pump, the filter element, the first auxiliary spring and the second auxiliary spring are arranged, the clogging can be cleared on line without contact, the mesh clogging rate is reduced, and the flour screening efficiency and the discharging speed are improved.

Description

Technical Field

[0001] This application relates to the field of flour sieving technology, specifically to a high-efficiency sieving device for flour processing. Background Technology

[0002] In modern wheat milling technology, the core process logic is "grinding in stages, grading and sieving, and homogeneous merging". The sieving process is the core link connecting each grinding process, realizing precise material diversion, flour purification and grading, and controlling the quality of finished products. Its equipment performance directly determines the production efficiency, energy consumption level, flour yield, finished flour grade, as well as food safety and environmental compliance of the milling production line. Horizontal rotary drum screens have been applied to a certain extent in the field of grain grading due to their simple structure, stable operation, and smooth material conveying.

[0003] Existing drum screens only have a single spiral guiding structure, which can only achieve axial pushing and screening of materials. They cannot effectively break up flour agglomerates, resulting in low fine powder sieving throughput, insufficient flour output, poor grading accuracy, and incomplete separation of bran and endosperm fine powder. This directly increases the ash content of the finished flour and reduces product quality. When screening high-moisture, high-viscosity flour, existing drum screens are prone to clogging and jamming of the screen holes. Existing mechanical cleaning structures such as built-in brushes and levers are prone to screen wear and secondary flour breakage. Furthermore, if the brushes and levers are not cleaned in time, they can easily lead to the growth of microorganisms in the flour they come into contact with, which does not comply with food safety production standards.

[0004] Therefore, it is necessary to provide a high-efficiency sieving device for flour processing to solve the above problems.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0006] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a high-efficiency sieving device for flour processing. Through the setting of a screening cylinder, spiral pusher, dispersing bar and discharge hopper, it can facilitate the efficient dispersing of agglomerates and improve the contact rate of the material screen surface, thereby improving the wheat flour yield and raw material utilization rate, and facilitating the grading and screening of flour. Through the setting of a vacuum pump, filter element, first auxiliary spring and second auxiliary spring, it can achieve non-contact online clearing of blockages, reduce the screen hole blockage rate, and thus improve the flour screening efficiency and discharge speed.

[0007] The technical solution adopted by this application to solve its technical problem is as follows: a high-efficiency sieving device for flour processing, including a sealed sieving chamber. Multiple sieving cylinders with different sieve hole sizes are arranged sequentially from left to right inside the sealed sieving chamber. A drive gear ring is installed and connected at the connection of each of the multiple sieving cylinders. Two spiral pusher strips are symmetrically arranged inside each sieving cylinder. Multiple dispersing strips are equidistantly arranged between the two spiral pusher strips along the spiral direction for dispersing flour agglomerates. A filter element is provided directly above each sieving cylinder and connected to the top of the sealed sieving chamber with a clamp. A vacuum pump is fixedly installed in the middle of the top of the sealed sieving chamber. Multiple air pipes are equidistantly connected through the connection between the vacuum pump and the sealed sieving chamber to assist in generating negative pressure in the upper and lower areas inside the sealed sieving chamber to clean clogged sieve holes. Two first positioning rings are symmetrically sleeved at both ends of the sealed sieving chamber. Multiple first auxiliary springs are equidistantly fixed to the inner walls of the two first positioning rings along the circumferential direction. The other end of the first auxiliary springs is fixedly connected to the sealed sieving chamber. Two first support rods are symmetrically clamped on the first positioning rings, and a first pad is fixed to the bottom of the first support rod.

[0008] Furthermore, each of the screening cylinders has a discharge hopper fixedly connected to the sealed screening chamber at its center directly below it. Both ends of the sealed screening chamber are fixedly connected to two fixed flanges. A connecting flange is fixedly installed on the fixed flange at one end of the sealed screening chamber by bolts. A feeding cylinder is fixed at the center of one end of the connecting flange. A feed hopper is fixed at one end of the top of the feeding cylinder. A spiral push rod is rotatably connected to the inner side of the feeding cylinder.

[0009] Furthermore, a first motor is installed in the middle of one end of the feeding cylinder, and the output end of the first motor is connected to one end of the spiral push rod. The feeding cylinder is connected to the sealed screening chamber.

[0010] Furthermore, a second positioning ring is sleeved in the middle of the feeding cylinder. Multiple second auxiliary springs are fixedly connected at equal intervals along the circumferential direction on the inner wall of the second positioning ring. The other end of the second auxiliary spring is fixedly connected to the feeding cylinder. Two second support rods are symmetrically clamped on the second positioning ring. A second pad is fixed to the bottom of the second support rod.

[0011] Furthermore, the other ends of the screening cylinders at the beginning and end of the sealed screening chamber are each fixed with a limiting ring plate. A limiting ring is fixed at the connection position between the limiting ring plate and the fixed flange. A limiting ring groove is formed at the connection position between the fixed flange and the limiting ring. The limiting ring plate is rotatably connected to the fixed flange through the limiting ring and the limiting ring groove. A sealing and plugging plate is installed on the fixed flange located away from the feeding cylinder in the sealed screening chamber.

[0012] Furthermore, each of the drive gear rings is meshed with a drive gear at its lower oblique position, and a shaft is fixedly connected through the middle of the multiple drive gears. A dust cover fixedly connected to the sealed screening chamber is sleeved on the outside of each drive gear. A second motor is provided at one end of the shaft, and the output end of the second motor is connected to the shaft for transmission.

[0013] Furthermore, a fixing ring is fixedly connected to both ends of the drive gear ring and one end of the limiting retaining ring plate. Multiple U-shaped grooves are equidistantly opened on the fixing ring along the circumferential direction. A bolt rod is fixed at the position where the screening cylinder connects with the U-shaped groove. A docking clamp sealing block is engaged with the inner side of the U-shaped groove. The bolt rod is connected through the middle of one end of the docking clamp sealing block. One end of the docking clamp sealing block is provided with a nut that is threadedly connected to the bolt rod.

[0014] Furthermore, one end of the docking clamp sealing block is fixedly connected with multiple insert rods at equal intervals along the circumference of the bolt rod, and a slot is provided at the position where the screening cylinder connects with the insert rods to limit and fix the position of the docking clamp sealing block.

[0015] The beneficial effects of this application are:

[0016] 1. This application provides a high-efficiency sieving device for flour processing. Through the arrangement of sieving cylinders, spiral pushers, dispersing bars, and a discharge hopper, during sieving, a rotating drive gear ring drives multiple sieving cylinders of different mesh sizes connected in series to rotate synchronously. During the rotation of these cylinders, the spiral pushers fixed to their inner walls push the flour to be sieving sequentially from the sieving cylinder at the beginning to the sieving cylinder at the end. The centrifugal force generated by the rotation of the sieving cylinders causes the flour inside to tumble. During this tumbling process, the flour passes through the space between two spiral pushers. The multiple dispersing strips in the spiral array break up flour agglomerates through collision, allowing all fine flour to contact the sieve surface and pass through. This prevents flour agglomeration from affecting the sieving effect. Qualified flour passes through the sieve cylinder and falls into the corresponding discharge hopper at the center of the bottom of the sieve cylinder. Unqualified material is pushed into the next adjacent sieve cylinder by the spiral pusher strips for further sieving. This efficient dispersing of agglomerates improves the contact rate of the material on the sieve surface, thereby increasing wheat flour yield and raw material utilization, and facilitating flour grading and sieving.

[0017] 2. This application provides a high-efficiency sieving device for flour processing. Through a vacuum pump, filter element, first auxiliary spring, and second auxiliary spring, the vacuum pump continuously extracts air from the sealed sieving chamber through multiple air pipes during the sieving process, creating a stable negative pressure environment inside the chamber. This creates a stable pressure difference from the inside out on both sides of the sieve holes of the sieving cylinder. During sieving, if bran or coarse particles clog the sieve holes, the pressure difference exerts an outward adsorption force on the blockage, preventing it from becoming stuck deeper in the sieve holes. As the sieving cylinder rotates, the blockage is removed from the material layer, and the adsorption force, centrifugal force, and spiral force further contribute to the sieving process. Under the combined action of the structural scraping force, the material detaches from the inner wall of the screen holes and falls back into the material flow, being conveyed to the discharge end along with the coarse material. At the same time, the filter element above the screening cylinder can intercept the scattered flour powder. The vibration force generated by the operation of the equipment is transmitted to the first and second auxiliary springs. The springs can attenuate most of the vibration, and at the same time, the elastic deformation of the springs drives the equipment to generate controllable micro-amplitude vibration, which helps to turn the material over, improve the screening rate, accelerate the sliding and collection of finished flour, and avoid material accumulation. This achieves non-contact online clearing, reduces the screen hole clogging rate, and thus improves the flour screening efficiency and discharge speed.

[0018] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure;

[0021] Figure 2 This is a schematic diagram of the overall cross-sectional three-dimensional structure;

[0022] Figure 3 A schematic diagram of a three-dimensional structure with multiple screening cylinders connected together;

[0023] Figure 4 A three-dimensional structural diagram showing the connection between the spiral push bar and the dispersing bar;

[0024] Figure 5 for Figure 2 A magnified structural diagram of part A in the middle.

[0025] The following are the labeling elements in the figure:

[0026] 1. Sealed screening chamber; 2. Discharge hopper; 3. First positioning ring; 4. First support rod; 5. First pad; 6. First auxiliary spring; 7. Fixed flange; 8. Connecting flange; 9. Feeding cylinder; 10. Feeding hopper; 11. First motor; 12. Second auxiliary spring; 13. Second positioning ring; 14. Second support rod; 15. Second pad; 16. Dust cover; 17. Shaft; 18. Second motor; 19. Vacuum pump; 20. Limiting ring plate; 21. Filter element; 22. Screening cylinder; 23. Drive gear ring; 24. Sealing and plugging disc; 25. Limiting ring; 26. Drive gear; 27. Spiral pusher bar; 28. Dispersing bar; 29. ​​Fixed ring; 30. Bolt rod; 31. Nut; 32. Connecting clamp sealing block; 33. Spiral pusher bar. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] like Figure 1-5As shown, this application provides a high-efficiency sieving device for flour processing, including a sealed sieving chamber 1. Multiple sieving cylinders 22 with different sieve hole sizes are arranged sequentially from left to right inside the sealed sieving chamber 1. A drive gear ring 23 is installed and connected at the connection points of the multiple sieving cylinders 22. Two spiral pusher strips 27 are symmetrically arranged inside each sieving cylinder 22. Multiple dispersing strips 28 are equidistantly arranged between the two spiral pusher strips 27 along the spiral direction for dispersing flour agglomerates. Limiting ring plates 20 are fixedly installed and fixed at the other ends of the sieving cylinders 22 located at the beginning and end positions of the sealed sieving chamber 1. Limiting rings 25 are fixed at the connection points between the limiting ring plates 20 and the fixed flange 7. The fixed flange 7 is connected to the limiting rings 25. A limiting ring groove is provided at the connection position. The limiting ring plate 20 is rotatably connected to the fixed flange 7 through the limiting ring 25 and the limiting ring groove. A sealing sealing plate 24 is installed on the fixed flange 7 located away from the feeding cylinder 9 in the sealed screening chamber 1. A driving gear 26 is meshed with the lower part of each driving gear ring 23. A shaft 17 is fixedly connected through the middle of the multiple driving gears 26. A dust cover 16 fixedly connected to the sealed screening chamber 1 is sleeved on the outside of each driving gear 26. A second motor 18 is provided at one end of the shaft 17. The output end of the second motor 18 is connected to the shaft 17 for transmission. A discharge hopper 2 fixedly connected to the sealed screening chamber 1 is provided in the middle of the lower part of each screening cylinder 22.

[0030] In this embodiment, during the sieving process, the second motor 18 is started, which drives the shaft 17 to rotate. The shaft 17 drives multiple fixed drive gears 26 to rotate. The rotating drive gears 26 drive multiple meshing drive rings 23 to rotate synchronously. The rotating drive rings 23 drive multiple sieving cylinders 22 with different sieve hole sizes connected in series to rotate synchronously. During the rotation of the multiple sieving cylinders 22, the spiral pusher strips 27 fixed on their inner walls push the flour to be sieved sequentially from the sieving cylinder 22 at the beginning to the sieving cylinder 22 at the end. The centrifugal force generated during rotation causes the flour inside to tumble. During this tumbling process, the flour passes through multiple dispersing strips 28 arranged in a spiral array between the two spiral pusher strips 27. The collision force generated when the dispersing strips 28 come into contact with the flour agglomerates breaks them apart, allowing all the fine powder to come into contact with the sieve surface and complete the sieving process. This prevents the flour from agglomerating and affecting the sieving effect. Qualified flour passes through the screening cylinder 22 and falls into the discharge hopper 2 corresponding to the center of the screening cylinder 22. Unqualified material is pushed by the spiral pusher strips 27 into the next adjacent screening cylinder 22 for sieving, thus classifying and screening the flour to be sieved.

[0031] It should be noted that the screen aperture of the screening cylinder 22 increases in size from the feed end to the discharge end, forming a gradient arrangement. After the ground material enters the screening cylinder 22 from the feed end on the left, it first passes through the screen on the small aperture screening cylinder 22 to extract qualified finished fine powder in advance, avoiding the fine powder being absorbed and wrapped by bran during long-distance material transportation, which would cause powder yield loss. As the material is transported axially, the screen aperture gradually increases, and different particle sizes of work-in-process are screened out in sequence. Finally, the coarsest bran fragments are discharged from the discharge end. The second motor 18 is a variable frequency geared motor. The dust cover 16 is used to protect the drive gear 26 to prevent external dust from falling on the drive gear 26 and affecting its performance.

[0032] like Figure 1 and Figure 2 As shown, each screening cylinder 22 has a filter element 21 directly above it, which is connected to the top of the sealed screening chamber 1 by a clamp. A vacuum pump 19 is fixedly installed at the center of the top of the sealed screening chamber 1. Multiple air pipes are equidistantly connected at the connection point between the vacuum pump 19 and the sealed screening chamber 1 to assist in generating negative pressure in the upper and lower areas inside the sealed screening chamber 1 to clean the blocked screen holes. Two first positioning rings 3 are symmetrically fitted at both ends of the sealed screening chamber 1. Multiple first auxiliary springs 6 are fixedly connected equidistantly along the circumferential direction on the inner wall of the two first positioning rings 3. The other end of the auxiliary spring 6 is fixedly connected to the sealed screening chamber 1. Two first support rods 4 are symmetrically clamped on the first positioning ring 3. A first pad 5 is fixed at the bottom of the first support rod 4. A second positioning ring 13 is sleeved in the middle of the feeding cylinder 9. Multiple second auxiliary springs 12 are equidistantly fixed on the inner wall of the second positioning ring 13 along the circumferential direction. The other end of the second auxiliary spring 12 is fixedly connected to the feeding cylinder 9. Two second support rods 14 are symmetrically clamped on the second positioning ring 13. A second pad 15 is fixed at the bottom of the second support rod 14.

[0033] In this embodiment, when cleaning the sieve holes, after the equipment is started, the vacuum pump 19 runs continuously, continuously extracting air from the inner cavity of the sealed screening chamber 1 through multiple air pipes equidistantly arranged at its connection point with the sealed screening chamber 1. This creates a stable negative pressure environment within the sealed inner cavity of the sealed screening chamber 1. Since the inner cavity of the screening cylinder 22 is connected to the feeding channel of the feeding cylinder 9 and maintains a normal pressure, a stable pressure difference from the inside to the outside is formed on both sides of each sieve hole on the wall of the screening cylinder 22. During the process of the screening cylinder 22 rotating to complete the flour sieving, if bran or coarse particles get stuck in the sieve holes and cause blockage, the pressure difference inside and outside the sieve holes will continuously exert an adsorption force from the inside to the outside on the blockage, firmly confining the blockage within the sieve holes. The inner opening prevents blockages from getting stuck deep within the screen holes. As the screening cylinder 22 continues to rotate, the blockage in the screen hole moves away from the internal material layer area. The blockage loses the pressure from the surrounding material and, under the combined action of centrifugal force generated by the rotation of the screen cylinder, the scraping force of the spiral structure inside the cylinder, and the continuous adsorption force of the pressure difference, falls off the inner wall of the screen hole and back into the material flow inside the screening cylinder 22. It is then conveyed to the discharge end with the coarse material. No blockages enter the finished flour area outside the screen cylinder throughout the entire process. This achieves online, contactless, and pollution-free cleaning of the screen holes without interrupting the screening operation. Simultaneously, the filter element 21 corresponding to the top of each screening cylinder 22 can clean the sealed screening chamber 1. Under high pressure, all upward-drifting flour powder is intercepted to prevent ultrafine powder from entering the vacuum pump 19 via the air pipe, causing pump wear, airway blockage, or equipment malfunction. During equipment operation, the mechanical vibration generated by the first motor 11 and the second motor 18 is synchronously transmitted to the sealed screening chamber 1 and the feeding cylinder 9, and then transmitted through the sealed screening chamber 1 and the feeding cylinder 9 to multiple sets of first auxiliary springs 6 arranged circumferentially on the inner wall of the first positioning ring 3 at both ends of the sealed screening chamber 1 and multiple sets of second auxiliary springs 12 arranged circumferentially on the inner wall of the second positioning ring 13 in the middle of the feeding cylinder 9. The first auxiliary springs 6 and the second auxiliary springs 12 can absorb and attenuate most of the mechanical vibration. The reciprocating elastic deformation generated by the first auxiliary spring 6 and the second auxiliary spring 12 during the vibration absorption process will drive the sealed screening chamber 1 and the feeding cylinder 9 to generate controllable micro-amplitude high-frequency vibration under the radial limitation of the first positioning ring 3 and the second positioning ring 13. This micro-vibration is synchronously transmitted to the screening cylinder 22 and the inner wall of the sealed screening chamber 1. On the one hand, it can help the material in the screening cylinder 22 to turn over evenly, enhance the contact effect between the material and the screen surface, and improve the screening efficiency. On the other hand, it can accelerate the finished flour that is attached to the inner wall of the sealed screening chamber 1 and the inner wall of the discharge hopper 2 after screening to slide down and collect quickly, avoiding material accumulation. At the same time, it can help the powder intercepted on the surface of the filter element 21 to fall off and be recycled, further improving the screening efficiency and material recovery rate of the equipment.

[0034] like Figure 1 and Figure 2As shown, two fixed flanges 7 are fixedly connected to both ends of the sealed screening chamber 1. A connecting flange 8 is fixedly installed on the fixed flange 7 at one end of the sealed screening chamber 1 by bolts. A feeding cylinder 9 is fixed to the middle of one end of the connecting flange 8. A feed hopper 10 is fixed to one end of the top of the feeding cylinder 9. A spiral push rod 33 is rotatably connected to the inner side of the feeding cylinder 9. A first motor 11 is installed in the middle of one end of the feeding cylinder 9. The output end of the first motor 11 is connected to one end of the spiral push rod 33 for transmission. The feeding cylinder 9 is connected to the sealed screening chamber 1.

[0035] In this embodiment, during feeding, the first motor 11 drives the spiral push rod 33 to rotate, and the rotating spiral push rod 33 pushes the flour material stored in the feed hopper 10 into the screening cylinder 22 set at the beginning of the inner side of the sealed screening chamber 1.

[0036] like Figure 2 , Figure 3 and Figure 5 As shown, a fixing ring 29 is fixedly connected to both ends of the drive gear ring 23 and one end of the limiting retaining ring plate 20. Multiple U-shaped slots are equidistantly provided on the fixing ring 29 along the circumferential direction. A bolt rod 30 is fixed at the position where the screening cylinder 22 connects to the U-shaped slot. A docking clamp sealing block 32 is engaged with the inner side of the U-shaped slot. The bolt rod 30 is connected through to the middle of one end of the docking clamp sealing block 32. One end of the docking clamp sealing block 32 is provided with a nut 31 that is threadedly connected to the bolt rod 30. Multiple insert rods are fixedly connected at equal intervals along the circumferential direction of the bolt rod 30 at one end of the docking clamp sealing block 32. A slot is provided at the position where the screening cylinder 22 connects to the insert rods to limit and fix the position of the docking clamp sealing block 32.

[0037] In this embodiment, when the screening cylinder 22 is worn or damaged, the nuts 31 on the drive gear ring 23 and the limiting ring plate 20 installed at both ends of the rotating screening cylinder 22 are rotated and removed from the bolt rod 30. Then, the docking clamp sealing block 32 is pulled to one end to separate the docking clamp sealing block 32 from the U-shaped groove. At this time, the limiting ring plate 20 and the drive gear ring 23 are removed from the screening cylinder 22. Then, the replacement screening cylinder 22 is reinstalled on the drive gear ring 23 and the screening cylinder 22 at one end of the corresponding screening cylinder 22 in the reverse operation steps.

[0038] Working principle: The first motor 11 drives the spiral pusher 33 to rotate, which pushes the flour material stored in the feed hopper 10 into the screening cylinder 22 located at the beginning of the sealed screening chamber 1. The second motor 18 is started, which drives the shaft 17 to rotate. The shaft 17 drives multiple through-mounted drive gears 26 to rotate, which in turn drives multiple meshing drive gear rings 23 to rotate synchronously. The rotating drive gear rings 23 then drive multiple screening cylinders 22 with different screen hole sizes connected in series to rotate synchronously. As the sieving cylinders 22 rotate, the spiral pusher strips 27 fixed on their inner walls push the flour to be sifted sequentially from the beginning sieving cylinder 22 to the end sieving cylinder 22. The centrifugal force generated by the rotation of the sieving cylinder 22 causes the flour inside to tumble. During this tumbling, the flour passes through the multiple dispersing strips 28 spirally arranged between the two spiral pusher strips 27. The collision force generated when the dispersing strips 28 come into contact with flour clumps breaks up the flour clumps, allowing all the fine powder to come into contact with the sieving surface and complete the sieving process, preventing flour clumps from affecting the sieving effect. Qualified flour passes through the screening cylinder 22 and falls into the discharge hopper 2 located in the center directly below the screening cylinder 22. Unqualified material is pushed by the spiral pusher 27 into the next adjacent screening cylinder 22 for screening. During the screening process, the vacuum pump 19 continuously extracts air from the sealed screening chamber 1 through multiple air pipes, creating a stable negative pressure environment inside the chamber. A stable pressure difference is formed from the inside to the outside on both sides of the sieve holes of the screening cylinder 22. During the screening process, if bran or coarse particles clog the sieve holes, the pressure difference will exert an outward adsorption force on the blockage, preventing it from getting stuck deeper in the sieve holes. As the screening cylinder 22 rotates, the blockage material dislodging from the sieve holes... After the material layer, under the combined action of adsorption force, centrifugal force, and the scraping force of the spiral structure, it falls off from the inner wall of the screen holes and falls back into the material flow, which is conveyed to the discharge end with the coarse material, realizing online unblocking without stopping the machine or causing pollution. At the same time, the filter element 21 above the screening cylinder 22 can intercept the scattered flour powder. The vibration force generated by the operation of the equipment is transmitted to the first auxiliary spring 6 and the second auxiliary spring 12. The springs can attenuate most of the vibration, reduce operating noise and installation vibration. At the same time, the elastic deformation of the springs drives the equipment to generate controllable micro-vibration, which helps to turn the material over, improve the screening rate, accelerate the sliding and collection of finished flour, and avoid material accumulation.

[0039] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A high-efficiency sieving device for flour processing, comprising a sealed sieving chamber (1), characterized in that: The sealed screening chamber (1) contains multiple screening cylinders (22) with different sieve hole sizes arranged sequentially from left to right. A drive gear ring (23) is installed at the connection of each screening cylinder (22). Each screening cylinder (22) has two symmetrically arranged spiral pusher strips (27). Multiple dispersing strips (28) are arranged equidistantly between the two spiral pusher strips (27) along the spiral direction to disperse flour agglomerates. A filter element (21) is provided at the top of each screening cylinder (22) and connected to the top of the sealed screening chamber (1) with a clamp. A vacuum pump (19) is installed and fixed at the middle of the top of the sealed screening chamber (1). The vacuum pump (19) and the sealed screening chamber (1) are connected by multiple air pipes at equal intervals at the connection position, which are used to help generate negative pressure in the upper and lower areas inside the sealed screening chamber (1) to clean the blocked screen holes. Two first positioning rings (3) are symmetrically sleeved at both ends of the sealed screening chamber (1). Multiple first auxiliary springs (6) are fixedly connected at equal intervals along the circumferential direction on the inner wall of the two first positioning rings (3). The other end of the first auxiliary springs (6) is fixedly connected to the sealed screening chamber (1). Two first support rods (4) are symmetrically clamped on the first positioning rings (3). A first pad (5) is fixed at the bottom of the first support rods (4).

2. The high-efficiency sieving device for flour processing according to claim 1, characterized in that: Each screening cylinder (22) has a discharge hopper (2) fixedly connected to the sealed screening chamber (1) at the center of its lower part. Both ends of the sealed screening chamber (1) are fixedly connected to two fixed flanges (7). A connecting flange (8) is fixedly installed on the fixed flange (7) at one end of the sealed screening chamber (1) by bolts. A feeding cylinder (9) is fixed in the middle of one end of the connecting flange (8). A feed hopper (10) is fixed at one end of the top of the feeding cylinder (9). A spiral push rod (33) is rotatably connected to the inner side of the feeding cylinder (9).

3. The high-efficiency sieving device for flour processing according to claim 2, characterized in that: A first motor (11) is installed in the middle of one end of the feeding cylinder (9). The output end of the first motor (11) is connected to one end of the spiral push rod (33). The feeding cylinder (9) is connected to the sealed screening chamber (1).

4. The high-efficiency sieving device for flour processing according to claim 2, characterized in that: The feeding cylinder (9) is fitted with a second positioning ring (13) in the middle. Multiple second auxiliary springs (12) are fixedly connected at equal intervals along the circumferential direction on the inner wall of the second positioning ring (13). The other end of the second auxiliary spring (12) is fixedly connected to the feeding cylinder (9). Two second support rods (14) are symmetrically clamped on the second positioning ring (13). A second pad (15) is fixed at the bottom of the second support rod (14).

5. The high-efficiency sieving device for flour processing according to claim 1, characterized in that: The other ends of the screening cylinders (22) provided at the beginning and end of the sealed screening chamber (1) are all fixed with limit ring plates (20). Limit rings (25) are fixed at the connection between the limit ring plates (20) and the fixed flange (7). Limit ring grooves are provided at the connection between the fixed flange (7) and the limit rings (25). The limit ring plates (20) are rotatably connected to the fixed flange (7) through the limit rings (25) and the limit ring grooves. A sealing plate (24) is installed on the fixed flange (7) provided in the direction away from the feeding cylinder (9) of the sealed screening chamber (1).

6. The high-efficiency sieving device for flour processing according to claim 1, characterized in that: Each of the drive gear rings (23) is connected to a drive gear (26) at its lower side. A shaft (17) is fixedly connected through the middle of the drive gears (26). A dust cover (16) fixedly connected to the sealed screening chamber (1) is sleeved on the outside of each drive gear (26). A second motor (18) is provided at one end of the shaft (17). The output end of the second motor (18) is connected to the shaft (17) for transmission.

7. The high-efficiency sieving device for flour processing according to claim 1, characterized in that: Both ends of the drive gear ring (23) and one end of the limiting retaining ring plate (20) are fixedly connected to a fixing ring (29). Multiple U-shaped slots are equidistantly provided on the fixing ring (29) along the circumferential direction. A bolt rod (30) is fixed at the position where the screening cylinder (22) is connected to the U-shaped slot. A docking clamp sealing block (32) is engaged on the inner side of the U-shaped slot. The bolt rod (30) is connected through the middle of one end of the docking clamp sealing block (32). One end of the docking clamp sealing block (32) is provided with a nut (31) that is threadedly connected to the bolt rod (30).

8. The high-efficiency sieving device for flour processing according to claim 7, characterized in that: One end of the docking clamp sealing block (32) is fixedly connected with multiple insert rods at equal intervals along the circumferential direction of the bolt rod (30). The screening cylinder (22) is provided with a slot at the position where it connects with the insert rods, which is used to limit and fix the position of the docking clamp sealing block (32).

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