Multi-layer screening structure for cereal powder

Abstract

The utility model discloses a multi-layer screening structure for grain powder, which belongs to the technical field of grain processing, and comprises a screening box, a feed hopper is arranged at the top of the screening box, three inclined slots are arranged on the side wall of the screening box, the three slots are arranged in a staggered manner, a screen is movably arranged in each slot, and the screen is arranged in the screening box. According to the multi-layer grain powder screening device, the three screens and the adjustable material control mechanism are arranged, multi-layer screening can be carried out on grain powder through the three screens, the grain powder is fully screened, the screening efficiency is improved, and the screening efficiency is improved. By arranging the material control plate on the screen, the movement time of grain powder on the screen can be delayed, the grain powder makes full contact with the screen to be screened, meanwhile, the movement delaying time of the grain powder can be adjusted according to the screening amount, and the grain powder screening effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of grain processing technology, and in particular to a multi-layer sieving structure for grain powder. Background Technology

[0002] Grain flour refers to powdered food made by grinding various grains (such as japonica rice, glutinous rice, wheat, barley, buckwheat, sorghum, millet, corn, etc.). Grain flour is rich in carbohydrates, which is one of the main sources of energy for the human body. At the same time, it also contains a variety of dietary fibers, vitamins, minerals and other nutrients. These components play an important role in maintaining normal physiological functions, promoting metabolism and enhancing immunity. The production process of grain flour usually includes steps such as washing, drying and grinding. Sieving the processed grain flour is an important step in ensuring the fineness of the grain flour.

[0003] Existing screening devices only use vibration to screen grain powder. Once the amount of grain fed increases, the grain powder cannot be completely screened, which can easily cause congestion inside the box, resulting in low screening efficiency and inconvenience in operation.

[0004] An existing patent (publication number: CN210647281U) discloses a grain powder grading and screening device, comprising a shell, a conical inlet fixedly disposed at the top of the shell, a first screen plate disposed at the top of the interior of the shell, and first outlets symmetrically disposed on the left and right side walls of the shell corresponding to two sets of stirring rods. A first fixing block is fixedly connected to the middle of the first screen plate, and a stirring shaft is disposed through the interior of the first fixing block. A circular sleeve is fitted on the outer side of the top of the stirring shaft, and two sets of stirring rods are symmetrically fixedly connected to the outer side of the circular sleeve. A second fixing block is fixedly fitted on the outer surface of the stirring shaft below the first screen plate, and a second screen plate is fixedly connected to the outer side of the second fixing block. Circular perforations are provided on both the left and right sides of the second screen plate. This invention effectively prevents grain powder from clogging inside the shell, can completely grade and screen grain powder, effectively improves the selection effect, facilitates feeding, and is easy to operate.

[0005] To address the aforementioned issues, existing patents offer solutions, but these solutions cannot perform multi-layer sieving of grain powder or delay the sieving time of grain powder on the sieve, resulting in excessively short residence time of grain powder on the sieve, making it difficult to sieve out some particles that fit the sieve, thus affecting the sieving effect.

[0006] Therefore, a multi-layer sieving structure for grain flour is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a multi-layer sieving structure for grain powder, which can solve the problems of existing grain powder sieving devices that cannot perform multi-layer sieving of grain powder and cannot delay the sieving time of grain powder on the screen, resulting in the grain powder having too short a residence time on the screen, making it difficult to sieve out some particles that meet the screen, thus affecting the sieving effect.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a multi-layer sieving structure for grain flour, including a sieving box, a feeding hopper at the top of the sieving box, three inclined slots on the side wall of the sieving box, the three slots being staggered, a screen being movably arranged inside the slot, the diameter of the screen holes of the three screens gradually decreasing from top to bottom, an adjustable material control mechanism in the middle of the sieving box, and a vibration support mechanism at the bottom of the sieving box;

[0009] The adjustable material control mechanism includes a rotating shaft, a material control plate, a positioning plate, positioning bolts, and threaded holes. Multiple rotating shafts are respectively bearing-connected to the middle of the screening box. The material control plate is fixedly connected to the middle of the rotating shaft and is located above the screen. The positioning plate is fixedly connected to one end of the rotating shaft. The positioning bolts are set on the side wall of the positioning plate. Multiple threaded holes are opened on the side wall of the screening box and are adapted to the threaded holes.

[0010] Preferably, the vibration support mechanism includes a hopper, a vibration motor, support columns, a mounting cover, a base, and a buffer spring. The hopper is located at the bottom of the screening box, two sets of vibration motors are mounted on the side wall of the hopper, four support columns are fixedly connected to the side wall of the screening box, the mounting cover is mounted on the side wall of the support columns, the base is movably located at the bottom of the support columns, and the buffer spring is sleeved on the bottom of the support columns, with the buffer spring located between the mounting cover and the base.

[0011] Preferably, a dispersing shaft is connected to the central bearing of the feed hopper, a plurality of dispersing blades are fixedly connected to the side wall of the dispersing shaft, a drive motor is bolted to the side wall of the feed hopper, and the output end of the drive motor is fixedly connected to the dispersing shaft.

[0012] Preferably, a plurality of storage hoppers are fixedly connected to the side wall of the screening box, and a movable groove is provided on the side wall of the storage hopper, and a sealing plate is movably installed inside the movable groove.

[0013] Preferably, a positioning screw is fixedly connected to the side wall of the screen, the positioning screw passes through the screening box, and a positioning nut is threadedly connected to the side wall of the positioning screw, the side wall of the positioning nut being in contact with the screening box.

[0014] Preferably, a first reinforcing link is provided between the plurality of bases, and a second reinforcing link is provided between the plurality of support columns.

[0015] Preferably, a handle for easy pulling is fixedly connected to the side wall of the screen.

[0016] Preferably, a transparent observation window is provided on the side wall of the screening box.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application features three screens and an adjustable material control mechanism. The three screens enable multi-layer sieving of grain powder, ensuring thorough sieving. The material control plates on the screens delay the movement time of the grain powder, allowing for full contact with the screen for sieving. Furthermore, the delay time can be adjusted according to the sieving volume, thus improving the sieving effect.

[0019] 2. This application incorporates a vibration support mechanism, which, through a vibration motor, enables the screening box to vibrate, allowing the grain powder on the screen to be vibrated and screened. This vibration support mechanism improves the screening efficiency of the grain powder. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is an overall structural view of the present invention;

[0022] Figure 2 This is the left view of the present invention;

[0023] Figure 3 For the present utility model Figure 2 A three-dimensional cross-sectional view of point AA in the middle;

[0024] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle;

[0025] Figure 5 This is a structural view of the movable groove and the sealing plate in this utility model;

[0026] Figure 6 This is a structural view of the drive motor in this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Screening box; 2. Feed hopper; 3. Slot; 4. Screen; 5. Adjustable material control mechanism; 6. Vibration support mechanism; 51. Rotating shaft; 52. Material control plate; 53. Positioning plate; 54. Positioning bolt; 55. Threaded hole; 61. Discharge hopper; 62. Vibration motor; 63. Support column; 64. Mounting cover; 65. Base; 66. Buffer spring; 7. Dispersing shaft; 8. Dispersing blade; 9. Drive motor; 10. Storage hopper; 11. Movable groove; 12. Sealing plate; 13. Positioning screw; 14. Positioning nut; 15. First reinforcing link; 16. Second reinforcing link; 17. Handle; 18. Transparent observation window. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1 to 6 This utility model provides a technical solution:

[0031] A multi-layer sieving structure for grain flour includes a sieving box 1, a feed hopper 2 at the top of the sieving box 1, three inclined slots 3 on the side wall of the sieving box 1, the three slots 3 being staggered, a screen 4 being movably installed inside the slot 3, the screen aperture diameter of the three screens 4 gradually decreasing from top to bottom, an adjustable material control mechanism 5 in the middle of the sieving box 1, and a vibration support mechanism 6 at the bottom of the sieving box 1.

[0032] The adjustable material control mechanism 5 includes a rotating shaft 51, a material control plate 52, a positioning plate 53, a positioning bolt 54, and threaded holes 55. Multiple rotating shafts 51 are respectively connected to the middle of the screening box 1 by bearings. The material control plate 52 is fixedly connected to the middle of the rotating shaft 51 and is located above the screen 4. The positioning plate 53 is fixedly connected to one end of the rotating shaft 51. The positioning bolt 54 is set on the side wall of the positioning plate 53. Multiple threaded holes 55 are opened on the side wall of the screening box 1 and are adapted to the threaded holes 55.

[0033] Specifically, such as Figure 3 and Figure 6 As shown, a dispersing shaft 7 is connected to the central bearing of the feed hopper 2. Multiple dispersing blades 8 are fixedly connected to the side wall of the dispersing shaft 7. A drive motor 9 is bolted to the side wall of the feed hopper 2. The output end of the drive motor 9 is fixedly connected to the dispersing shaft 7.

[0034] Specifically, such as Figure 5 As shown, multiple storage hoppers 10 are fixedly connected to the side wall of the screening box 1. The side wall of the storage hopper 10 is provided with a movable groove 11, and a sealing plate 12 is movably arranged inside the movable groove 11.

[0035] Specifically, such as Figure 5 As shown, a positioning screw 13 is fixedly connected to the side wall of the screen 4. The positioning screw 13 passes through the screening box 1. A positioning nut 14 is threadedly connected to the side wall of the positioning screw 13. The side wall of the positioning nut 14 is in contact with the screening box 1.

[0036] Specifically, such as Figure 3 As shown, a handle 17 for easy pulling is fixedly connected to the side wall of the screen 4.

[0037] Specifically, such as Figure 1 As shown, a transparent observation window 18 is provided on the side wall of the screening box 1.

[0038] Grain powder enters the screening box 1 through the feed hopper 2. During the feeding process, the dispersing shaft 7 driven by the drive motor 9 and its dispersing blades 8 initially disperse the grain powder, ensuring uniform particle distribution and preventing agglomeration, thereby improving separation efficiency. After being dispersed, the grain powder enters the screening box 1 and first encounters the upper screen 4 with the largest aperture. Larger particles are retained on the upper screen 4, while smaller particles continue to fall, passing through the middle and lower screens with gradually decreasing aperture diameters, achieving graded screening of grain powder of different particle sizes. The inclined setting of the screen 4 facilitates the natural sliding of the grain powder. At the same time, through the design of the slot 3, positioning screw 13, and positioning nut 14, the screen 4 can be easily installed, disassembled, and replaced to adapt to the screening requirements of different particle sizes. The setting of the control plate 52 can delay the grain powder from falling onto the screen 4. The upward and downward movement time allows the grain powder to be fully screened on the screen 4. By rotating the positioning disc 53, the position of the control plate 52 can be adjusted, thereby controlling the flow rate of the grain powder through the screen 4. When it is necessary to speed up the screening, the control plate 52 can be adjusted to a more open position; conversely, when it is necessary to screen more finely, the control plate 52 can be adjusted to a narrower position. The cooperation of the positioning bolt 54 and the threaded hole 55 ensures that the position of the control plate 52 is fixed, avoiding shaking during the screening process. The screened grain powder falls into the corresponding storage hopper 10. The sealing plate 12 of the storage hopper 10 is designed to be easy to open and close, facilitating material retrieval. In this way, multi-layer screening of grain powder is achieved, which can delay the screening time of grain powder on the screen 4, allowing the grain powder to be fully screened and improving the screening time of grain powder.

[0039] Specifically, such as Figure 3As shown, the vibration support mechanism 6 includes a feeding hopper 61, a vibration motor 62, support columns 63, a mounting cover 64, a base 65, and a buffer spring 66. The feeding hopper 61 is located at the bottom of the screening box 1. Two sets of vibration motors 62 are mounted on the side wall of the feeding hopper 61. Four support columns 63 are fixedly connected to the side wall of the screening box 1. The mounting cover 64 is mounted on the side wall of the support columns 63. The base 65 is movably located at the bottom of the support columns 63. The buffer spring 66 is sleeved on the bottom of the support columns 63 and is located between the mounting cover 64 and the base 65.

[0040] Specifically, such as Figure 3 As shown, a first reinforcing link 15 is provided between multiple bases 65, and a second reinforcing link 16 is provided between multiple support columns 63.

[0041] Vibration motor 62 is installed on the side wall of hopper 61. When vibration motor 62 is started, it generates high-frequency vibration, which is transmitted to screening box 1 through hopper 61, thereby driving screen 4 to vibrate. This vibration helps the grain powder move on screen 4, prevents screen hole blockage, and improves screening efficiency and screening quality. Support column 63 is fixedly connected to the side wall of screening box 1 to provide stable support for screening box 1. Mounting cover 64 is installed on the side wall of support column 63 to protect support column 63 and buffer spring 66 from external environmental interference. Base 65 is movably set at the bottom of support column 63. Buffer spring 66 is sleeved at the bottom of support column 63 and located between mounting cover 64 and base 65. When vibration motor 62 is working, buffer spring 66 can absorb and disperse vibration energy, reduce the impact of vibration on screening box 1 and the surrounding environment, and increase the stability of screening process. First reinforcing rod and second reinforcing rod respectively support and reinforce support column 63 and base 65.

[0042] By adopting the above technical solution, the problem that existing grain powder screening devices cannot perform multi-layer screening of grain powder and cannot delay the screening time of grain powder on screen 4 is solved. This results in the grain powder having too short a residence time on screen 4, making it difficult to screen out some particles that meet the requirements of screen 4, thus affecting the screening effect.

[0043] Working Principle: In use, the dispersing shaft 7 driven by the drive motor 9 and its dispersing blades 8 initially disperse the grain powder. After dispersion, the grain powder enters the screening box 1 and first encounters the upper screen 4 with the largest aperture. Larger particles are retained on the upper screen 4, while smaller particles continue to fall, passing through the middle and lower screens with gradually decreasing aperture diameters, thus achieving the grading and screening of grain powder of different particle sizes. The setting of the control plate 52 can delay the movement time of the grain powder on the screen 4, allowing the grain powder to be fully screened on the screen 4. By rotating the positioning disk 53, the position of the control plate 52 can be adjusted, thereby controlling the flow rate of grain powder through the screen 4. When it is necessary to speed up the screening, the control plate 52 can be adjusted to a more open position. At the same time, when the vibration motor 62 is started, it generates high-frequency vibration, which is transmitted to the screening box 1 through the feed hopper 61, thereby driving the screen 4 to vibrate. This vibration helps the grain powder move on the screen 4, prevents screen hole blockage, and improves screening efficiency and screening quality.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-layer sieving structure for grain flour, comprising a sieving box (1), characterized in that: The top of the screening box (1) is provided with a feed hopper (2), and three inclined slots (3) are provided on the side wall of the screening box (1). The three slots (3) are staggered. A screen (4) is movably arranged inside the slot (3). The diameter of the screen holes of the three screens (4) gradually decreases from top to bottom. An adjustable material control mechanism (5) is provided in the middle of the screening box (1), and a vibration support mechanism (6) is provided at the bottom of the screening box (1). The adjustable material control mechanism (5) includes a rotating shaft (51), a material control plate (52), a positioning plate (53), a positioning bolt (54), and threaded holes (55). Multiple rotating shafts (51) are respectively connected to the middle of the screening box (1) by bearings. The material control plate (52) is fixedly connected to the middle of the rotating shaft (51). The material control plate (52) is located above the screen (4). The positioning plate (53) is fixedly connected to one end of the rotating shaft (51). The positioning bolt (54) is set on the side wall of the positioning plate (53). Multiple threaded holes (55) are opened on the side wall of the screening box (1) and are adapted to the threaded holes (55).

2. The multi-layer sieving structure for grain flour according to claim 1, characterized in that: The vibration support mechanism (6) includes a feeding hopper (61), a vibration motor (62), a support column (63), a mounting cover (64), a base (65), and a buffer spring (66). The feeding hopper (61) is located at the bottom of the screening box (1). Two sets of vibration motors (62) are installed on the side wall of the feeding hopper (61). Four support columns (63) are fixedly connected to the side wall of the screening box (1). The mounting cover (64) is installed on the side wall of the support column (63). The base (65) is movably located at the bottom of the support column (63). The buffer spring (66) is sleeved on the bottom of the support column (63) and is located between the mounting cover (64) and the base (65).

3. The multi-layer sieving structure for grain flour according to claim 1, characterized in that: The feed hopper (2) has a central bearing connected to a dispersing shaft (7), and multiple dispersing blades (8) are fixedly connected to the side wall of the dispersing shaft (7). A drive motor (9) is bolted to the side wall of the feed hopper (2), and the output end of the drive motor (9) is fixedly connected to the dispersing shaft (7).

4. The multi-layer sieving structure for grain flour according to claim 1, characterized in that: Multiple storage hoppers (10) are fixedly connected to the side wall of the screening box (1). A movable groove (11) is provided on the side wall of the storage hopper (10). A sealing plate (12) is movably installed inside the movable groove (11).

5. A multi-layer sieving structure for grain flour according to claim 1, characterized in that: A positioning screw (13) is fixedly connected to the side wall of the screen (4). The positioning screw (13) passes through the screening box (1). A positioning nut (14) is threadedly connected to the side wall of the positioning screw (13). The side wall of the positioning nut (14) is in contact with the screening box (1).

6. A multi-layer sieving structure for grain flour according to claim 2, characterized in that: A first reinforcing link (15) is provided between the plurality of bases (65), and a second reinforcing link (16) is provided between the plurality of support columns (63).

7. A multi-layer sieving structure for grain flour according to claim 1, characterized in that: A handle (17) for easy pulling is fixedly connected to the side wall of the screen (4).

8. A multi-layer sieving structure for grain flour according to claim 1, characterized in that: A transparent observation window (18) is provided on the side wall of the screening box (1).

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