Screening device of rice huller
The design of the material distribution and screening mechanisms solves the problem of low rice screening efficiency, achieving uniform distribution and efficient screening of rice, thus improving production efficiency and ease of operation.
Patent Information
- Application Number
- CN202520119772.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing vibrating bed screening machines are inefficient in the rice screening process, and the rice tends to accumulate, requiring repeated screening and manual intervention, which leads to reduced production efficiency.
It adopts a material distribution mechanism and a screening mechanism, including an inclined bottom plate and a screen plate design. It uses the weight of the rice to disperse and evenly drop the rice. Combined with the design of the screen box and observation port, it can achieve uniform distribution and real-time monitoring of the rice, avoiding accumulation and jamming.
It improves rice screening efficiency, reduces manual intervention steps, enhances production efficiency, simplifies operation procedures, and ensures efficient screening and collection of rice.
Smart Images
Figure CN223832808U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rice screening, and in particular to a screening device for a rice hulling machine. Background Technology
[0002] Rice screening is an important process, which mainly involves removing rice husks, straws, and shriveled or immature grains from the harvested rice to ensure the quality of the rice and facilitate storage and subsequent processing.
[0003] In existing technologies, vibrating bed screening machines are commonly used. These machines are equipped with screening devices to separate paddy rice from mixed rice straw. Vibrating bed screening machines not only improve the efficiency of paddy rice cleaning but also help ensure paddy rice quality and extend its shelf life.
[0004] However, in actual production, the rice yield is high, the screening process is lengthy, and the amount of rice fed is large. The rice tends to pile up on one side of the screen plate. Because the rice is not evenly spread in time, small particles mixed in with the pile cannot be screened out, requiring multiple screenings to completely separate the small particles. This results in low screening efficiency and limits the efficiency of the rice dehulling machine. Furthermore, when the rice is not evenly spread, manual spreading is required, necessitating operator control, which makes actual production cumbersome and reduces efficiency. Utility Model Content
[0005] A screening device for a rice hulling machine is provided to allow rice grains to be spread evenly on a sieve plate.
[0006] The above-mentioned objective of this application is achieved through the following technical solution:
[0007] A screening device for a rice hulling machine includes a machine body, a material distribution mechanism, and a screening mechanism. The screening mechanism is located below the material distribution mechanism and includes an inclined screen plate. The material distribution mechanism includes a feed pipe, a shell, a bottom plate, and a material distribution plate. The shell has a feed inlet and a discharge outlet. The feed pipe is inserted outside the feed inlet and communicates with the shell. The bottom plate is fixedly connected to both sides of the shell and is coaxially aligned with the feed inlet. One end of the bottom plate is fixedly connected to the inner wall of the shell away from the discharge outlet, and the other end is inclined downward away from the feed inlet. The projection direction of the bottom plate on the horizontal plane is parallel to the screening and conveying direction of the rice by the screen plate. The material distribution plate is vertically fixedly connected to the bottom plate and includes a feed end and a discharge end. The feed end is away from the discharge outlet and close to the center of the bottom plate, and the discharge end is inclined downward away from the center of the bottom plate.
[0008] By adopting the above technical solution, the feed pipe transports the rice into the shell. Due to its own gravity, the rice falls onto the bottom plate. The inclined bottom plate allows the rice to slide downwards and disperse evenly onto the distribution plate, reducing clumping. When the rice on the bottom plate passes the distribution plate, the distribution plate further distributes the rice, ensuring it falls evenly into the middle and sides of the screening mechanism. This avoids excessive accumulation in the middle of the screening mechanism, improves the screening efficiency of the rice, and increases the efficiency of actual production.
[0009] Optionally, the screening mechanism further includes a screen box, with the outer walls on both sides of the discharge port inserted into the screen box.
[0010] By adopting the above technical solution, the outer walls on both sides of the discharge port are inserted into the screen box. The two sides of the screen box block the rice grains falling out of the shell, and at the same time prevent the rice grains from falling to the ground and causing difficulties in collection. There is no need for operators to sweep and collect the rice grains on the ground after screening, which speeds up the work efficiency of operators.
[0011] Optionally, the sieve plate is installed at an inclination inside the sieve box, and the inclination direction of the sieve plate is the sieving and conveying direction of the rice. An observation port is opened on the upstream side of the sieve box in the sieving and conveying direction, and a baffle for controlling the opening and closing of the observation port is installed on the observation port.
[0012] By adopting the above technical solution, the baffle and the two sides of the sieve box can be detachably connected, which facilitates the assembly and disassembly of the baffle. Opening the baffle allows observation of the actual situation of the sieve plate inside the sieve box, preventing rice straw from getting stuck inside the sieve plate and affecting the sieve plate's screening effect. At the same time, it is convenient to clean the rice straw inside the sieve plate of the sieve box.
[0013] Optionally, the sieve plate includes a first sieve plate and a second sieve plate, with the first sieve plate or the second sieve plate located at one end in the upstream direction of the sieving conveying direction, parallel to the observation port, and aligned inside the observation port.
[0014] By adopting the above technical solution, the outer walls on both sides of the discharge port are inserted into the screen box, which affects the observation of the screening of the screen plate. By observing the screen plate inside the screen box through the observation port, the screening of rice can be monitored in real time, avoiding the situation where rice straw is stuck on the screen plate and cannot be observed, thus affecting the screening of rice.
[0015] Optionally, the upstream ends of the first sieve plate and the second sieve plate in the sieving conveying direction are both parallel to the observation port and aligned inside the observation port.
[0016] By adopting the above technical solution, both the first and second sieve plates can be observed through the observation port. While observing whether the first sieve plate is stuck with rice straw, it is also possible to observe whether there are other materials affecting the screening of the second sieve plate, thereby improving the screening efficiency and processing capacity.
[0017] Optionally, the two sides of the screen box are connected to the baffle tower.
[0018] By adopting the above technical solution, no other tools are needed to disassemble the baffle, which facilitates the assembly and disassembly of the baffle. At the same time, the buckle on one side of the baffle can be opened, and the baffle can be rotated around the buckle on the other side as an axis. While the baffle is connected to the screen box, the internal condition of the screen box can be observed. There is no need to disassemble and assemble the entire baffle, which shortens the time for cleaning and replacing the screen plate and improves the use effect of the equipment.
[0019] Optionally, slide rails are provided on both inner walls of the screen box, and the first screen plate and the second screen plate are slidably connected to the slide rails.
[0020] By adopting the above technical solution, both screen plates are slidably connected to the slide rail. After working for a period of time, some rice straw and gravel will be left on the screen plates. Open one side of the baffle and pull the corresponding screen plate out from the screen box through the observation port for cleaning, which makes it easy to clean the rice straw and gravel left on the surface of the vibrating screen.
[0021] Optionally, a viewing window is installed on the side of the housing facing away from the base plate.
[0022] By adopting the above technical solution, the visual panel allows operators to easily observe whether there are rice straws or other debris stuck in the material distribution plate, preventing rice straws from getting stuck between the bottom plate and the material distribution plate and affecting the conveying of rice.
[0023] In summary, this application has at least the following beneficial effects:
[0024] 1. When the rice grains pass through the bottom plate inside the hull, the bottom plate slides and disperses the rice grains, reducing clumping. When the rice grains on the bottom plate pass through the distribution plate, the distribution plate further distributes the rice grains, ensuring that the rice grains fall evenly into the middle and sides of the screening mechanism. This avoids excessive accumulation in the middle of the screening mechanism and eliminates the need for manual spreading of the rice grains on the screening mechanism, reducing a troublesome step in actual production, improving the screening efficiency of the rice screening mechanism, and increasing the efficiency of actual production.
[0025] 2. The outer walls of the shell facing the screening mechanism are inside the inner wall of the screening mechanism. The two sides of the screening mechanism block the rice grains falling out of the shell, preventing the rice grains from falling to the ground and making them difficult to collect. There is no need for operators to sweep and collect the rice grains on the ground after screening, which speeds up the work efficiency of the operators. Attached image description:
[0026] Figure 1 This is a schematic diagram of the screening device of a rice hulling machine;
[0027] Figure 2 An exploded view of the material distribution mechanism;
[0028] Figure 3 This is a schematic diagram of the explosion of the baffle.
[0029] Figure 4 This is an exploded view of the screening mechanism.
[0030] Reference numerals: 1. Machine body; 2. Material distribution mechanism; 21. Feed pipe; 22. Shell; 221. Feed inlet; 222. Discharge outlet; 223. Viewing window; 23. Base plate; 24. Material distribution plate; 241. Feed end; 242. Discharge end; 25. Viewing panel; 26. Fixing frame; 3. Screening mechanism; 31. Screen box; 32. Screen plate; 321. First screen plate; 3211. Long screen hole; 322. Second screen plate; 3221. Circular screen hole; 33. Rocker arm; 34. Baffle; 35. Observation port; 36. Slide rail. Detailed implementation method:
[0031] The following section provides a more detailed description, in conjunction with the accompanying diagrams:
[0032] As attached Figure 1 As shown, a screening device for a rice hulling machine includes a machine body 1, a material distribution mechanism 2, and a screening mechanism 3.
[0033] As attached Figure 1 and attached Figure 3 As shown, the screening mechanism 3 includes a screen box 31, a screen plate 32, a rocker arm 33, and a baffle 34.
[0034] The screen box 31 is fixedly connected to the machine body 1 and is located below the material distribution mechanism 2. The screen plate 32 is installed at an inclination inside the screen box 31, and the inclination direction of the screen plate 32 is the screening and conveying direction of the rice.
[0035] The sieve box 31 is located on one side of the sieving conveying direction and has an observation port 35.
[0036] As attached Figure 3 and attached Figure 4As shown, the sieve plate 32 includes a first sieve plate 321 and a second sieve plate 322. The first sieve plate 321 and the second sieve plate 322 are located on the upstream side of the screening conveying direction and are parallel to the observation port 35 and aligned inside the observation port 35. The first sieve plate 321 and the second sieve plate 322 can be observed through the observation port 35. While observing whether the first sieve plate 321 is stuck with rice straw, it is also possible to observe whether there are other materials affecting the screening of the second sieve plate 322, thereby improving the screening efficiency and processing capacity.
[0037] The inner walls of both sides of the screen box 31 are equipped with slide rails 36 along the screening conveying direction. The first screen plate 321 and the second screen plate 322 are slidably connected to the slide rails 36 on both sides. After working for a period of time, some rice straw and gravel will remain on the screen plate 32. The corresponding screen plate 32 can be pulled out from the screen box 31 through the observation port 35 for cleaning, which facilitates the cleaning of the rice straw and gravel remaining on the surface of the vibrating screen.
[0038] The sieve holes on the surfaces of the first sieve plate 321 and the second sieve plate 322 have different shapes. The surface of the first sieve plate 321 has evenly distributed elongated sieve holes 3211, which screen larger impurities or irregularly shaped materials. The surface of the second sieve plate 322 has evenly distributed circular sieve holes 3221, which screen the husks of rice and some smaller particles. By selecting sieve holes of different shapes, impurities of different sizes can be effectively screened.
[0039] The rocker arm 33 is rotatably connected to one side of the sieve box 31. The drive mechanism drives the rocker arm 33 to shake up and down. The up and down shaking of the rocker arm 33 can control the sieve plate 32 to vibrate back and forth, and sieve the rice on the sieve plate 32.
[0040] The shape of the baffle 34 is the same as that of the observation port 35. The baffle 34 is attached to the side of the observation port 35 away from the screen plate 32. The baffle 34 is connected to the two sides of the screen box 31 by latches. When the latch on one side of the baffle 34 is opened, the baffle 34 can be rotated around the latch on the other side as an axis. While the baffle 34 is connected to the screen box 31, the internal condition of the screen box 31 can be observed. There is no need to disassemble and reassemble the baffle 34 as a whole, which shortens the cleaning and replacement time of the screen plate 32 and improves the use effect of the equipment.
[0041] As attached Figure 1 and attached Figure 2 As shown, the material distribution mechanism 2 includes a feed pipe 21, a housing 22, a base plate 23, a distribution plate 24, a viewing plate 25, and a fixing frame 26.
[0042] The shell 22 has a feed inlet 221 on the side facing the feed pipe 21 and a discharge outlet 222 on the side facing the screening mechanism 3. The surfaces containing the feed inlet 221 and the discharge outlet 222 are both planes and parallel to each other. The space of the shell 22 gradually increases from the feed inlet 221 to the discharge outlet 222.
[0043] One end of the feed pipe 21 is inserted outside the feed port 221, and the other end is connected to the conveying pipe. The feed pipe 21 is connected to the housing 22 through the feed port 221.
[0044] The bottom plate 23 is located inside the shell 22 and is coaxially aligned with the feed inlet 221. After alignment, the rice grains fall evenly onto the bottom plate 23 after falling from the feed inlet 221. The two sides of the bottom plate 23 are fixedly connected to the inner wall of the shell 22. One end of the bottom plate 23 is fixedly connected to the inner wall of the shell 22 away from the discharge outlet 222, and the other end is inclined downward away from the feed inlet 221. The projection direction of the bottom plate 23 on the horizontal plane is parallel to the screening and conveying direction of the rice grains by the screen plate 32. The inclined bottom plate 23 allows the rice grains to slide down the slope with the help of gravity. During the sliding process, the rice grains are evenly dispersed and fall onto the distribution plate 24, reducing the possibility of clumping.
[0045] The material distribution plate 24 is vertically fixed to the base plate 23. The material distribution plate 24 includes an inlet end 241 and an outlet end 242. The inlet end 241 is far away from the outlet 222 and close to the center of the base plate 23. The outlet end 242 is inclined downward away from the center of the base plate 23. The inclined material distribution plate 24 further distributes the rice on the base plate 23, so that the rice can be evenly distributed to the middle and sides of the screening mechanism 3, avoiding excessive accumulation in the middle of the screening mechanism 3, improving the screening efficiency of the screening mechanism 3 for rice, and increasing the efficiency of actual production.
[0046] The outer walls on both sides of one end of the discharge port 222 are inserted into the screen box 31. The two sides of the screen box 31 block the rice grains falling from the discharge port 222, preventing the rice grains from falling to the ground and causing difficulty in collection. This eliminates the need for operators to sweep and collect the rice grains on the ground after screening, thus speeding up the work efficiency of the operators.
[0047] A viewing window 223 is also provided on the outer wall of the housing 22 facing away from the base plate 23. The size of the viewing window 223 is smaller than the size of the outer wall. A viewing panel 25 is installed on the viewing window 223. The viewing panel 25 is made of a transparent material, specifically a transparent plastic panel. The viewing panel 25 is attached to the outside of the viewing window 223 and fixed by riveting. The viewing window 223 allows the operator to observe whether there are any straws or other debris stuck on the distribution plate 24 and the base plate 23, preventing straws from getting stuck on the base plate 23 and the distribution plate 24 and affecting the conveying of rice.
[0048] The outer walls on both sides of one end of the discharge port 222 are fixedly connected to the machine body 1 by welding through the fixing frame 26.
[0049] The working process of this embodiment:
[0050] The conveying mechanism transports rice into the feed pipe 21 through the conveying pipe. The rice in the feed pipe 21 is conveyed from the feed inlet 221 to the shell 22. Due to its own gravity, the rice falls evenly onto the bottom plate 23. The inclined bottom plate 23 evenly distributes the falling rice. The rice slides to the distribution plate 24 due to its own gravity. The distribution plate 24 further distributes the rice that has slid off the bottom plate 23 away from the discharge end 242. The space enclosed by the distribution plate 24 and the bottom plate 23 distributes most of the rice on the bottom plate 23 to both sides of the discharge outlet 222. The remaining rice falls evenly at the discharge outlet 222, reducing the amount of rice falling onto the screen plate 3 after leaving the discharge outlet 222. The phenomenon of 2-middle clustering improves the screening efficiency of the screening mechanism 3 for rice, increasing the efficiency of actual production; the rice falling from both sides and the middle of the discharge port 222 is evenly spread on the screen plate 32. The drive mechanism will drive the rocker arm 33 to shake up and down. The rocker arm 33 will shake up and down, causing the screen box 31 to vibrate. The vibration of the screen plate 32 will screen the rice on the surface of the screen plate 32. At the same time, the screen plate 32 is installed at an angle in the screen box 31. While the screen plate 32 vibrates, the required material will fall from the screen holes on the screen plate 32 to the bottom. Rice straw and some larger materials will be stuck on the screen holes on the surface and conveyed along the screening conveying direction. After working for a period of time, the screen plate 32 in the screen box 31 should be cleaned or replaced.
[0051] When the screen plate 32 needs to be cleaned or replaced after working for a period of time, turn off the power and stop the equipment. Open the buckle on one side of the baffle 34, and rotate the baffle 34 away from the observation port 35 with the buckle on the other side of the baffle 34 as the axis. Observe the actual situation of the screen plate 32 in the screen box 31 through the observation port 35. Pull the screen plate 32 out of the screen box 31 from the observation port 35 away from the downstream of the screening conveying direction, and clean the rice straw or material on the surface of the screen plate 32.
[0052] The observation port 35 allows observation of the actual condition of the surfaces of the two screen plates 32, improving the efficiency of cleaning the screen plates 32. At the same time, while the baffle 34 is connected to the screen box 31, the internal condition of the screen box 31 can also be observed. The screen plates 32 can be pulled out without disassembling the baffle 34 as a whole, shortening the cleaning and replacement time of the screen plates 32 and improving the use effect of the equipment.
[0053] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.
Claims
1. A screening device for a rice hulling machine, comprising a body (1), characterized in that, The system includes a material distribution mechanism (2) and a screening mechanism (3). The screening mechanism (3) is located below the material distribution mechanism (2). The screening mechanism (3) includes an inclined screen plate (32). The material distribution mechanism (2) includes a feed pipe (21), a housing (22), a bottom plate (23), and a material distribution plate (24). The housing (22) is provided with a feed inlet (221) and a discharge outlet (222). The feed pipe (21) is inserted outside the feed inlet (221) and communicates with the housing (22). The bottom plate (23) is fixedly connected to both sides of the housing (22), and the bottom plate (23) is coaxially aligned with the feed inlet (221). One end of the base plate (23) is fixedly connected to the inner wall of the shell (22) away from the discharge port (222), and the other end is inclined downward away from the feed port (221). The projection direction of the base plate (23) on the horizontal plane is parallel to the screening and conveying direction of the rice by the sieve plate (32). The dividing plate (24) is vertically fixedly connected to the base plate (23). The dividing plate (24) includes a feed end (241) and a discharge end (242). The feed end (241) is away from the discharge port (222) and close to the center of the base plate (23). The discharge end (242) is inclined downward away from the center of the base plate (23).
2. The screening device of a rice hulling machine according to claim 1, characterized in that, The screening mechanism (3) also includes a screen box (31), and the outer walls on both sides of one end of the discharge port (222) are inserted into the screen box (31).
3. The screening device for a rice hulling machine according to claim 2, characterized in that, The sieve plate (32) is installed at an inclination inside the sieve box (31). The sieve plate (32) is inclined in the direction of rice sieving and conveying. The sieve box (31) has an observation port (35) on the upstream side of the sieving and conveying direction. A baffle (34) for controlling the opening and closing of the observation port (35) is installed on the observation port (35).
4. The screening device for a rice hulling machine according to claim 3, characterized in that, The sieve plate (32) includes a first sieve plate (321) and a second sieve plate (322). The first sieve plate (321) or the second sieve plate (322) is located at one end in the upstream direction of the sieving conveying direction, parallel to the observation port (35), and aligned inside the observation port (35).
5. The screening device for a rice hulling machine according to claim 4, characterized in that, The first sieve plate (321) and the second sieve plate (322) are both parallel to the observation port (35) at their upstream ends in the sieving conveying direction and are aligned inside the observation port (35).
6. The screening device for a rice hulling machine according to claim 3, characterized in that, The two sides of the sieve box (31) are connected to the baffle (34) in a tower-like manner.
7. A screening device for a rice hulling machine according to claim 4 or 5, characterized in that, The inner walls on both sides of the sieve box (31) are provided with slide rails (36), and the first sieve plate (321) and the second sieve plate (322) are slidably connected to the slide rails (36).
8. The screening device for a rice hulling machine according to claim 1, characterized in that, A viewing window (223) is installed on the side of the housing (22) facing away from the bottom plate (23).