Screening device for rice milling
By designing a grading and screening component and an aggregation and recovery mechanism, multi-stage screening and recovery of rice materials were achieved, solving the problems of imprecise screening and material waste in existing equipment, and improving production efficiency and equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 湖南创源生物科技有限公司
- Filing Date
- 2025-07-18
- Publication Date
- 2026-07-17
Smart Images
Figure CN224507620U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rice milling technology, and in particular to a screening device for rice milling. Background Technology
[0002] In the grain processing industry, rice milling is a crucial step in ensuring rice quality and enhancing its utilization value. Screening, as an important process in rice milling, directly affects the precision, purity, and subsequent processing efficiency of the final product. Through screening, rice flour of different particle sizes formed after milling can be separated, removing impurities and non-compliant particles, thereby obtaining rice flour products that meet specific standards.
[0003] However, existing screening devices still have certain limitations in practical applications. Among them, the inability to perform grading screening is a prominent problem. Existing screening devices usually only have a single type of screening hole, which cannot effectively separate materials of different sizes, reducing the quality of screening and making the screening process less refined, thus affecting the effect of rice milling.
[0004] Meanwhile, existing equipment is inadequate in handling larger rice flour particles that do not pass through the sieve after screening. These larger rice flour particles cannot be used directly as qualified products because their particle size does not meet the requirements. However, most of them still have high utilization value and can be converted into standard rice flour through further milling. However, the current screening equipment lacks effective collection of these larger rice flour particles, which reduces production efficiency, wastes raw materials, and increases processing costs. Utility Model Content
[0005] This utility model aims to at least partially solve one of the technical problems in the related art.
[0006] Therefore, the purpose of this utility model is to propose a screening device for rice milling. By designing a grading screening component, it ensures that the material is screened in multiple stages, making the screening of the material more precise. At the same time, the collection and recycling mechanism realizes the recycling and collection of the retained material, avoiding the waste caused by the retained material and enabling the material to be re-grinded. Finally, the use of a fixed component facilitates the collection of the retained material and further improves the stability of the device.
[0007] To achieve the above objectives, this utility model proposes a sieving device for rice milling, comprising a sieving table, a feeding hopper, a discharging hopper, a grading and sieving assembly, and a collection and recovery mechanism. The feeding hopper is installed in a feeding trough on the upper surface of the sieving table, and the discharging hopper is installed in a discharging trough on the bottom surface of the sieving table. The grading and sieving assembly includes a first sieving plate, a second sieving plate, and a connecting frame. The first sieving plate is disposed inside the sieving table, and the second sieving plate is disposed inside the sieving table, with the first sieving plate positioned above the second sieving plate. The collection and recovery mechanism is installed inside the sieving table, with the first sieving plate positioned below the feeding trough of the sieving table, and the second sieving plate positioned above the discharging trough of the sieving table. The aperture of the sieving holes in the first sieving plate is larger than that in the second sieving plate.
[0008] This utility model discloses a sieving device for rice milling. The ground rice material is poured into a feeding hopper, which is installed in a feeding groove on the upper surface of a sieving platform. Its funnel-shaped structure guides the material to fall evenly and stably onto the first sieving plate below. When the material falls onto the first sieving plate, materials larger than the sieving holes cannot pass through and are retained on the first sieving plate, while materials smaller than the sieving holes fall through and enter the next sieving stage. The material falling from the first sieving plate onto the second sieving plate is then retained, falling directly down the second sieving plate into the discharge hopper below. This multi-stage sieving process refines the milled rice material. Then, a collection and recovery mechanism is operated to collect and recover the material retained on the first and second sieving plates, allowing for re-grinding and preventing material waste.
[0009] In addition, the sieving device for rice milling proposed in this utility model may also have the following additional technical features:
[0010] Specifically, the aggregation and recycling mechanism includes a first inclined panel, a second inclined panel, a pusher plate, an adjusting block, an aggregation plate, and a fixing component. The first inclined panel and the second inclined panel are respectively installed at one end of the first screening plate and the second screening plate. Both pusher plates are installed inside the screening table and abut against the upper surfaces of the first screening plate and the second screening plate. A plurality of adjusting blocks are symmetrically installed inside the screening table, and the surfaces of the first screening plate and the second screening plate are symmetrically provided with grooves adapted to the adjusting blocks, and the adjusting blocks are slidably connected in these grooves. The fixing component is installed on the surface of the screening table, and the aggregation plate is installed at the end of the second inclined panel away from the screening table.
[0011] Specifically, the fixing assembly includes a mounting plate, connecting rods, sleeve rods, plug-in rods, and a return spring. The mounting plate is attached to one side surface of the screening table. Multiple connecting rods are mounted on one end of the mounting plate near the screening table and are respectively connected to the first screening plate and the second screening plate. Two sleeve rods are symmetrically mounted on the surface of the mounting plate. The plug-in rod is slidably connected inside the sleeve rod, with one end of the plug-in rod passing through the sleeve rod and the mounting plate and being inserted into a hole on the surface of the screening table. The return spring is sleeved on the surface of the plug-in rod, with one end connected to the plug-in rod and the other end installed inside the sleeve rod.
[0012] Specifically, the other end of the plug rod passes through the sleeve rod and extends to the outside of the sleeve rod, and is connected to a handle disposed on the outside of the sleeve rod.
[0013] Specifically, both the upper surfaces of the first screening plate and the second screening plate are equipped with blocking strips.
[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0015] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:
[0016] Figure 1 This is a schematic diagram of the screening device of this utility model used in rice milling;
[0017] Figure 2 This is a schematic cross-sectional view of the screening table in the screening device for rice milling of this utility model.
[0018] Figure 3 This is a schematic diagram of the structure of the sieving device of this utility model used in rice milling when the particles are aggregated.
[0019] Figure 4 This is a schematic diagram of the aggregation and recovery mechanism in the screening device for rice milling of this utility model;
[0020] Figure 5 This is a schematic diagram of the fixed component structure in the sieving device for rice milling of this utility model.
[0021] As shown in the figure:
[0022] 1. Screening table; 2. Feeding hopper; 3. Discharging hopper;
[0023] 4. Grading and screening assembly; 41. First screening plate; 42. Second screening plate; 43. Connecting frame;
[0024] 5. Gathering and recycling mechanism; 51. Inclined panel one; 52. Inclined panel two; 54. Push plate; 55. Adjusting block; 57. Gathering plate;
[0025] 56. Fixing component; 561. Mounting plate; 562. Connecting rod; 563. Sleeve rod; 564. Insert rod; 565. Return spring. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Rather, the embodiments of this utility model include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.
[0027] The following description, in conjunction with the accompanying drawings, describes a sieving device for rice milling according to an embodiment of the present invention.
[0028] like Figures 1-5 As shown, the sieving device for rice milling according to this embodiment of the present invention may include a sieving table 1, a feeding hopper 2, a discharging hopper 3, a grading and sieving assembly 4, and a collection and recovery mechanism 5, wherein...
[0029] The feeding hopper 2 is installed in the feeding trough opened on the upper end face of the screening table 1, and the discharging hopper 3 is installed in the discharging trough opened on the bottom face of the screening table 1.
[0030] It should be noted that, in this embodiment, through the cooperation of the above components, the screening table 1 serves as a carrier, integrating functions such as feeding, screening, discharging, and recycling into one unit. The feeding hopper 2 and the discharging hopper 3 respectively play the roles of "input" and "output," providing basic structural support for the efficient operation of the grading and screening component 4 and the aggregation and recycling mechanism 5, ultimately achieving precise grading and screening of the rice material. The feeding hopper 2 is the "entry point" for the material entering the device, installed in the feeding trough, and guides the material to enter the grading and screening component 4 evenly through its own structure. The discharging hopper 3 is the "exit point" for the screened material, installed in the discharging trough on the bottom surface of the screening table 1, used to collect and discharge the screened material.
[0031] The grading and screening assembly 4 includes a first screening plate 41, a second screening plate 42, and a connecting frame 43, wherein,
[0032] The first screening plate 41 is disposed inside the screening table 1, and the second screening plate 42 is disposed inside the screening table 1, with the first screening plate 41 located above the second screening plate 42.
[0033] It should be noted that the grading and screening component 4 described in this embodiment is the core component of the entire device to realize the "grading and screening" function. It completes the multi-stage screening of rice materials through the hierarchical arrangement of the first screening plate 41 and the second screening plate 42 and the fixed support of the connecting frame 43. The first screening plate 41 is located above the second screening plate 42. This "layered" structure is the key to realizing "multi-stage screening" and conforms to the grading logic of "coarse screening first, then fine screening". Ultimately, it realizes the two-stage separation of large particles to small particles. The connecting frame 43 integrates the first screening plate 41 and the second screening plate 42.
[0034] The collection and recycling mechanism 5 is installed inside the screening table 1. The first screening plate 41 is located below the feeding trough of the screening table 1, and the second screening plate 42 is located above the discharging trough of the screening table 1. The diameter of the screening holes of the first screening plate 41 is larger than that of the screening holes of the second screening plate 42.
[0035] It should be noted that the collection and recycling mechanism 5 described in this embodiment is installed inside the screening table 1. Its position needs to be designed in conjunction with the screening paths of the first screening plate 41 and the second screening plate 42. Its core function is to collect the materials separated from each stage during the screening process, avoid material scattering and waste, and re-grind the collected materials. The rice material to be screened enters the feeding trough of the screening table 1 from the feeding hopper 2 and falls directly onto the first screening plate 41. The first screening plate 41 intercepts larger materials, while smaller particles fall through the screen holes to the second screening plate 42. The second screening plate 42 then continues to finely screen the material and drops the screened material into the discharge hopper 3, thereby improving the efficiency of material screening.
[0036] Specifically, the ground rice material is poured into the feeding hopper 2, which is installed in the feeding trough on the upper end of the screening table 1. Its funnel-shaped structure guides the material to fall evenly and stably onto the first screening plate 41 below. When the material falls onto the first screening plate 41, the material larger than its screening holes cannot pass through the screen holes and will be retained on the first screening plate 41. The material smaller than its screening holes will fall through the screen holes and enter the next screening stage. After the material falling from the first screening plate 41 falls onto the second screening plate 42, the material larger than its screening holes is retained and falls directly into the feeding hopper 3 below along the second screening plate 42. This achieves multi-stage screening of the ground rice material, making the screening more refined. Then, the gathering and recycling mechanism 5 is operated to gather and recycle the material retained on the first screening plate 41 and the second screening plate 42, and then re-grind the material to avoid material waste.
[0037] In one embodiment of this utility model, such as Figures 1-5As shown, the aggregation and recycling mechanism 5 includes a first inclined plate 51, a second inclined plate 52, a pusher plate 54, an adjusting block 55, an aggregation plate 57, and a fixing component 56. The first inclined plate 51 and the second inclined plate 52 are respectively installed at one end of the first screening plate 41 and the second screening plate 42. The two pusher plates 54 are installed inside the screening table 1, and the two pusher plates 54 respectively abut against the upper surfaces of the first screening plate 41 and the second screening plate 42. A plurality of adjusting blocks 55 are symmetrically installed inside the screening table 1, and the surfaces of the first screening plate 41 and the second screening plate 42 are symmetrically provided with grooves adapted to the adjusting blocks 55, and the adjusting blocks 55 are slidably connected in these grooves. The fixing component 56 is installed on the surface of the screening table 1, and the aggregation plate 57 is installed at the end of the second inclined plate 52 away from the screening table 1.
[0038] Furthermore, both the upper surfaces of the first screening plate 41 and the second screening plate 42 are equipped with blocking strips.
[0039] Specifically, inclined plate 1 51 and inclined plate 2 52 are respectively installed at the discharge ends of the first screening plate 41 and the second screening plate 42. Their inclined angle design can accelerate material flow and avoid accumulation. First, operate the fixing component 56, and then pull the first screening plate 41 and the second screening plate 42 through the fixing component 56, so as to facilitate simultaneous pulling operation. At this time, the sliding grooves on the first screening plate 41 and the second screening plate 42 slide on the adjusting block 55. As the first screening plate 41 and the second screening plate 42 are continuously pulled, the pushing plate 54 will intercept the material. The material on the first screening plate 41 and the second screening plate 42 is pushed and processed. During the pushing process, the blocking strip can block the material to prevent it from falling off the first screening plate 41 and the second screening plate 42. The pushing plate 54 pushes the material to the inclined plate 1 51 and the inclined plate 2 52. Since the inclined plate 1 51 and the inclined plate 2 52 are designed with inclined surfaces, the material slides down the inclined surfaces into the collecting plate 57, thereby realizing the collection and processing of the intercepted material, which is convenient for subsequent re-grinding of the material.
[0040] In one embodiment of this utility model, such as Figures 1-5As shown, the fixing assembly 56 includes a mounting plate 561, connecting rods 562, sleeve rods 563, plug-in rods 564, and a return spring 565. The mounting plate 561 is attached to one side surface of the screening table 1. Multiple connecting rods 562 are installed on one end of the mounting plate 561 near the screening table 1 and are respectively connected to the first screening plate 41 and the second screening plate 42. Two sleeve rods 563 are symmetrically installed on the surface of the mounting plate 561. The plug-in rod 564 is slidably connected inside the sleeve rods 563, and one end of the plug-in rod 564 passes through the sleeve rod 563 and the mounting plate 561 in sequence and is inserted into the insertion hole opened on the surface of the screening table 1. The return spring 565 is sleeved on the surface of the plug-in rod 564, and one end of the return spring 565 is connected to the plug-in rod 564. The other end of the return spring 565 is installed inside the sleeve rod 563.
[0041] Furthermore, such as Figure 5 As shown, the other end of the plug rod 564 passes through the sleeve rod 563 and extends to the outside of the sleeve rod 563, and is connected to the handle provided on the outside of the sleeve rod 563.
[0042] Specifically, the operator holds the handle at the end of the insertion rod 564 and pulls it away from the screening table 1. The insertion rod 564 slides within the sleeve rod 563, compressing the return spring 565, which is preferably 60si. 2Mn spring steel, a material with excellent elastic limit and fatigue strength, can maintain stable elasticity even in multiple compression-reset cycles, allowing the compressed reset spring 565 to store energy. The other end of the plug rod 564 exits from the insertion hole on the surface of the screening table 1, releasing the connection between the mounting plate 561 and the screening table 1. Then, the mounting plate 561 is pulled, causing it to slide the first screening plate 41 and the second screening plate 42 within the screening table 1 via the connecting rod 562, thereby collecting the trapped material on the first screening plate 41 and the second screening plate 42. After collection, the first screening plate 41 and the second screening plate 42 are reset. Then, the operator releases the handle, at which point the reset spring 565 releases its elastic potential energy, pushing the plug rod 564 to slide towards the screening table 1 and re-insert into the corresponding insertion hole, thereby fixing the first screening plate 41 and the second screening plate 42.
[0043] In summary, the sieving device for rice processing according to this utility model embodiment pours the ground rice material into the feeding hopper 2. The feeding hopper 2 guides the material to gather at the bottom through a funnel-shaped structure and falls evenly into the first screening plate 41 directly below the feeding trough of the screening table 1. The first screening plate 41 has a larger screen aperture and performs the function of coarse screening: materials larger than the screen aperture are intercepted, and materials smaller than the screen aperture fall through the screen aperture to the second screening plate 42. The second screening plate 42 is located below the first screening plate 41 and has a smaller screen aperture, which performs the function of fine screening. Then the material is further screened. The screened material falls down along the feeding hopper 3, completing the screening process.
[0044] When the material retained on the first screening plate 41 and the second screening plate 42 needs to be re-ground, the operator holds the handle of the insertion rod 564 and pulls it away from the screening table 1, compressing the return spring 565, causing the insertion rod 564 to disengage from the insertion hole of the screening table 1, releasing the lock of the mounting plate 561, and pulling the mounting plate 561, which in turn drives the first screening plate 41 and the second screening plate 42 to slide inside the screening table 1 via the connecting rod 562. The adjusting block 55 moves synchronously along the slide groove, and the pushing plate 54 pushes the material on the first screening plate 41 to the inclined plate 51, removing the material remaining on the second screening plate 42. The material is pushed to the inclined plate 52. During this process, the blocking strip prevents the material from falling. The inclined plate 51 and the inclined plate 52 guide the material to slide down to the gathering plate 57 through the inclined structure. The gathering plate 57 gathers the material for subsequent reprocessing in rice milling. After recycling, the mounting plate 561 is pushed to drive the first screening plate 41 and the second screening plate 42 back to their initial positions. The handle of the plug rod 564 is released, the reset spring 565 releases its elastic potential energy, and the plug rod 564 is pushed to re-insert into the insertion hole of the screening table 1, locking the positions of the first screening plate 41 and the second screening plate 42.
[0045] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.
Claims
1. A sieving device for rice milling, characterized in that, It includes a screening table (1), a feeding hopper (2), a discharging hopper (3), a grading and screening assembly (4), and a collection and recovery mechanism (5), wherein, The feeding hopper (2) is installed in the feeding trough opened on the upper end face of the screening table (1), and the discharging hopper (3) is installed in the discharging trough opened on the bottom face of the screening table (1). The grading and screening assembly (4) includes a first screening plate (41), a second screening plate (42), and a connecting frame (43), wherein, The first screening plate (41) is disposed inside the screening table (1), the second screening plate (42) is disposed inside the screening table (1), and the first screening plate (41) is located above the second screening plate (42); The aggregation and recycling mechanism (5) is installed inside the screening table (1). The first screening plate (41) is located below the feeding trough of the screening table (1), and the second screening plate (42) is located above the discharging trough of the screening table (1). The diameter of the screening hole of the first screening plate (41) is larger than that of the screening hole of the second screening plate (42). The collection and recycling mechanism (5) includes a first inclined plate (51), a second inclined plate (52), a pusher plate (54), an adjusting block (55), a collection plate (57), and a fixing component (56), wherein, The inclined plate one (51) and the inclined plate two (52) are respectively installed at one end of the first screening plate (41) and the second screening plate (42). The two push plates (54) are installed inside the screening table (1), and the two push plates (54) respectively abut against the upper surface of the first screening plate (41) and the second screening plate (42). A plurality of adjusting blocks (55) are symmetrically installed inside the screening table (1), and the surfaces of the first screening plate (41) and the second screening plate (42) are symmetrically provided with sliding grooves adapted to the adjusting blocks (55). The adjusting blocks (55) are slidably connected in the sliding grooves. The fixing component (56) is installed on the surface of the screening table (1), and the gathering plate (57) is installed at the end of the inclined plate (52) away from the screening table (1).
2. A screening device for flour milling according to claim 1, characterized in that, The fixing assembly (56) includes a mounting plate (561), a connecting rod (562), a sleeve rod (563), a plug-in rod (564), and a return spring (565), wherein, The mounting plate (561) is attached to one side surface of the screening table (1). Multiple connecting rods (562) are installed on one end of the mounting plate (561) near the screening table (1). The multiple connecting rods (562) are respectively connected to the first screening plate (41) and the second screening plate (42). Two sleeve rods (563) are symmetrically installed on the surface of the mounting plate (561). The plug rod (564) is slidably connected inside the sleeve rod (563). One end of the plug rod (564) passes through the sleeve rod (563) and the mounting plate (561) in sequence and is inserted into the insertion hole opened on the surface of the screening table (1). The return spring (565) is sleeved on the surface of the plug rod (564), and one end of the return spring (565) is connected to the plug rod (564), while the other end of the return spring (565) is installed inside the sleeve rod (563).
3. A screening device for flour milling according to claim 2, characterized in that, The other end of the plug rod (564) passes through the sleeve rod (563) and extends to the outside of the sleeve rod (563), and is connected to a handle disposed on the outside of the sleeve rod (563).
4. The screening device for flour milling according to claim 1, characterized in that, Both the first screening plate (41) and the second screening plate (42) have blocking strips installed on their upper surfaces.