Rice polishing machine

Abstract

The utility model discloses a rice polishing machine, including the bin body, two polishing rollers and sieve plate, two polishing roller set up in the bin body to the opposite direction rotation, sieve plate is obliquely arranged below two polishing roller and extends to the right side of bin body, still include two cleaning brush board and two breather board. The utility model discloses through setting up " brushing + blowing " dual cleaning mechanism, completely solved the industry difficult problem of traditional polishing machine sieve plate easy to block. Cleaning brush board is responsible for scraping big, sticky attachment, and the air jet head is responsible for removing fine dust, and both cooperate, ensure that sieve plate maintains the very high permeability at any time, and the blowing of airflow also makes the surface of rice grain more dry, clean, reduces the secondary attachment of bran powder, improves the appearance and storage stability of finished rice.

Description

Technical Field

[0001] This utility model relates to the field of rice processing technology, and in particular to a rice polishing machine. Background Technology

[0002] Polished rice has a more attractive appearance and a more delicate taste. Polishing is an important process for improving the quality of rice and is often done using rice polishing machines. Polished rice not only has a smoother finish but also a better appearance and is easier to store. It is one of the important steps in rice processing.

[0003] Common rice polishing machines use two opposing rotating polishing rollers to polish rice. However, if these rollers are not cleaned regularly, it can severely impact the quality and efficiency of rice processing, as well as the equipment itself. The rollers become clogged with thick layers of rice bran powder and grease, becoming smooth and losing their original friction. This prevents effective polishing of the rice grains, resulting in dull, lackluster rice that is significantly less appealing. Existing rice polishing machines also make cleaning the two rollers inconvenient, especially in the gaps between the polishing protrusions or spiral lines. Therefore, this paper proposes a new rice polishing machine to address these problems. Utility Model Content

[0004] This utility model provides a rice polishing machine, including a chamber, two polishing rollers, and a sieve plate. The two polishing rollers are disposed in the chamber and rotate in opposite directions. The sieve plate is inclinedly disposed below the two polishing rollers and extends to the right side of the chamber. It also includes two cleaning brushes and two ventilation plates. The two cleaning brushes are disposed opposite each other between the left and right walls of the chamber. The two ventilation plates are respectively installed on opposite sides of the two cleaning brushes. The bottom ends of the two ventilation plates are connected to multiple air jets at intervals. An air supply component is disposed on the outside of the chamber and is connected to the two ventilation plates. A vibration mechanism is disposed at the bottom end of the sieve plate.

[0005] Preferably, it also includes a cleaning component; the cleaning component includes an air pump, a diverter pipe and two hoses, the air pump is located on the right side of the chamber, the two hoses are respectively connected to the ends of the two ventilation plates, the diverter pipe is connected to the air outlet of the air pump, and the two air outlets are connected to the two hoses.

[0006] Preferably, a connecting plate is connected between the two cleaning brushes, and a hydraulic cylinder is vertically installed at the top of the chamber, with the telescopic rod connected to the top of the connecting plate.

[0007] Preferably, the left and right walls of the chamber are provided with limiting grooves, and both ends of the two cleaning brushes are connected to sliders, with the sliders on the same side slidingly connected to the inner wall of the limiting groove on the same side.

[0008] Preferably, the inner wall of the silo is connected to a limiting plate, a spring is connected between the limiting plate and the sieve plate, and a limiting rod is connected to the bottom end of the sieve plate, passing through the limiting plate and the spring.

[0009] Preferably, the vibration mechanism includes a U-shaped frame, a vibration motor, and a guide plate. The U-shaped frame is connected to the bottom end of the sieve cleaning brush plate, the vibration motor is disposed on the bottom wall of the U-shaped frame, and the guide plate is connected between the left and right walls of the U-shaped frame and located above the vibration motor.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] By implementing a dual cleaning mechanism of "brushing + blowing," the industry problem of easy clogging of the sieve plate in traditional polishing machines has been completely solved. The cleaning brush plate is responsible for scraping off large, sticky deposits, while the air jet head is responsible for removing fine dust. The two work together to ensure that the sieve plate maintains extremely high permeability at all times. The airflow also makes the surface of the rice grains drier and smoother, reducing the secondary adhesion of bran powder and improving the appearance and storage stability of the finished rice. Attached Figure Description

[0012] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0013] In the attached diagram: Figure 1 This is a schematic diagram of a rice polishing machine proposed in this utility model; Figure 2 This is a schematic diagram of a cleaning brush plate and a ventilation plate in a rice polishing machine proposed in this utility model; Figure 3 This is a cross-sectional view of a rice polishing machine proposed in this utility model; Figure 4 This is a schematic diagram of a vibration component for a rice polishing machine proposed in this utility model; Figure descriptions: 1. Chamber body; 2. Polishing roller; 3. Cleaning brush; 31. Connecting plate; 4. Ventilation plate; 5. Hydraulic cylinder; 61. Air pump; 62. Diverter pipe; 63. Hose; 71. Screen plate; 72. Limiting rod; 73. Spring; 81. U-shaped frame; 82. Vibration motor; 83. Guide plate. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] like Figure 1-3 As shown, the present invention proposes a rice polishing machine, comprising a chamber 1, two polishing rollers 2 and a sieve plate 7. The two polishing rollers 2 are disposed inside the chamber 1 and rotate in opposite directions. The sieve plate 7 is inclinedly disposed below the two polishing rollers 2 and extends to the right side of the chamber 1. The invention is characterized by further comprising two cleaning brush plates 3 and two ventilation plates 4. The two cleaning brush plates 3 are disposed opposite each other between the left and right walls of the chamber 1. The two ventilation plates 4 are respectively installed on opposite sides of the two cleaning brush plates 3. The bottom ends of the two ventilation plates 4 are connected to multiple air jets 41 at intervals. An air supply component is disposed on the outside of the chamber 1 and is connected to the two ventilation plates 4. A vibration mechanism is disposed at the bottom end of the sieve plate 7.

[0017] In this invention, the rice to be polished, either brown rice or unmilled rice, is fed into the silo 1. Two polishing rollers 2, driven by a drive unit, rotate at a high speed in opposite directions. Under the friction, kneading, and collision of the polishing rollers 2, the bran, germ, and other particles on the surface of the rice are peeled off, thus achieving polishing and making it smooth. The peeled bran and broken rice, under the influence of gravity, pass through the gap between the high-speed rotating polishing rollers 2 and fall onto the inclined sieve plate 7. A cleaning brush 3 is placed close to or very close to the upper surface of the sieve plate 7. As the equipment operates, the cleaning brush 3 continuously or intermittently brushes the sieve plate 7, effectively scraping away the bran and starch particles clogging the sieve holes, keeping the sieve holes unobstructed. The ventilation plate 4 works in conjunction with the cleaning brush 3. Compressed air supplied by the air supply unit is distributed through the vent plate 4 and ejected at high speed from multiple jet nozzles 41 at its bottom. The airflow can blow away the fine dust adhering to the surface of the sieve plate and inside the sieve holes, forming a "gas-solid" composite cleaning with the physical scraping of the cleaning brush plate. The effect is far superior to single mechanical cleaning. Driven by the vibration mechanism, the sieve plate 7 continuously performs high-frequency micro-amplitude vibration. The polished rice grains that meet the specifications jump and move towards the discharge port on the right side under the inclined surface of the sieve plate 7 and the action of vibration, and are finally discharged from the machine, completing the entire polishing process. The rice bran and fine particles that are screened out pass through the sieve holes and fall into the bran collection system below for collection. The two polishing rollers 2 are driven by a motor to rotate the gear on one side, which in turn drives the gear on the other side to rotate, thereby causing the two polishing rollers 2 to rotate relative to each other.

[0018] In an optional embodiment, a cleaning assembly is also included; the cleaning assembly includes an air pump 61, a diversion pipe 62 and two hoses 63, the air pump 61 is located on the right side of the chamber 1, the two hoses 63 are respectively connected to the ends of the two ventilation plates 4, the diversion pipe 62 is connected to the air outlet of the air pump 61, and the two air outlets are connected to the two hoses 63.

[0019] It should be noted that the air pump 61, as the core power source of the system, operates continuously after startup. It draws in air from the surrounding environment and compresses and accelerates it through high-speed rotating blades or piston movement within its interior, ultimately outputting a stable compressed air flow with specific pressure and flow rate. The flexible hose 63 can bend freely, effectively absorbing vibrations from the vibrating mechanism, ensuring that the air pump 61 and the distributor pipe 62 operate in a relatively static and stable environment, greatly improving the system's reliability and service life. Compressed air enters the internal cavity of the vent plate 4 through the hose 63. The vent plate 4, acting as an air collection chamber, provides a slight buffer for the high-speed airflow, stabilizing its internal air pressure and achieving airflow diffusion, ensuring that the multiple jet heads 41 connected to its bottom receive a pressure-balanced air source.

[0020] In an optional embodiment, a connecting plate 31 is connected between the two cleaning brushes 3, and a hydraulic cylinder 5 is vertically installed at the top of the chamber 1, with the telescopic rod connected to the top of the connecting plate 31.

[0021] In an optional embodiment, limiting grooves are provided on both the left and right walls of the chamber 1, and sliders are connected to both ends of the two cleaning brushes 3. The sliders on the same side are slidably connected to the inner wall of the limiting groove on the same side.

[0022] It should be noted that the connecting plate 31 spans between the two cleaning brushes 3, forming a rigid integral frame structure. The key to this design is that it integrates the two originally independent cleaning brushes into a unified motion unit. Through this connection, the hydraulic cylinder 5 only needs to act on the center point of the connecting plate 31 via an actuator telescopic rod to synchronously drive the left and right cleaning brushes 3 and the vent plate 4 above them to move up or down simultaneously. This ensures that the cleaning components on both sides of the equipment are always at the same height, with completely synchronized movement, avoiding problems such as jamming, uneven wear, or inconsistent cleaning results caused by asynchrony.

[0023] In an optional embodiment, the inner wall of the hopper 1 is connected to a limiting plate 71, and a spring 73 is connected between the limiting plate 71 and the sieve plate 7. The bottom end of the sieve plate 7 is connected to a limiting rod 72, which passes through the limiting plate 71 and the spring 73.

[0024] In an optional embodiment, the vibration mechanism includes a U-shaped frame 81, a vibration motor 82, and a guide plate 83. The U-shaped frame 81 is connected to the bottom end of the sieve cleaning brush 3, the vibration motor 82 is disposed on the bottom wall of the U-shaped frame 81, and the guide plate 83 is connected between the left and right walls of the U-shaped frame 81 and is located above the vibration motor 82.

[0025] It should be noted that the vibrating motor 82 is the power core of the system. Upon startup, its internal high-speed rotating eccentric block generates a powerful, directional centrifugal force. Due to the design of the eccentric block, the horizontal components of this centrifugal force cancel each other out, while the vertical components superimpose, thus forming a periodic excitation force perpendicular to the screen surface. The guide plate 83 is installed between the left and right walls of the U-shaped frame 81, directly above the vibrating motor 82. Its key function is guidance and protection, directing falling rice bran and dust to both sides, effectively preventing them from directly accumulating and covering the vibrating motor housing, avoiding overheating damage due to poor heat dissipation, and ensuring its long-term stable operation in harsh environments. After receiving the excitation force from the cleaning brush plate, the screen plate 7 does not vibrate freely. It is strictly constrained by an elastic guiding system composed of a limiting plate 71, a spring 73, and a limiting rod 72. The limiting rod 72 passes through the center of the spring and through the guide hole of the limiting plate 71; its core function is precision guidance. It ensures that the screen plate 7 can only perform strictly vertical linear motion, completely eliminating any horizontal swaying or torsion. This guarantees that the vibration energy is fully utilized for the throwing and conveying of materials, rather than being wasted on useless friction and collisions.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rice polishing machine, comprising a chamber (1), two polishing rollers (2), and a sieve plate (7), wherein the two polishing rollers (2) are disposed within the chamber (1) and rotate in opposite directions, and the sieve plate (7) is obliquely disposed below the two polishing rollers (2) and extends to the right side of the chamber (1), characterized in that, It also includes two cleaning brushes (3) and two ventilation plates (4). The two cleaning brushes (3) are arranged opposite each other between the left and right walls of the chamber (1). The two ventilation plates (4) are respectively installed on the opposite side of the two cleaning brushes (3). The bottom ends of the two ventilation plates (4) are connected to multiple air jets (41) at intervals. An air supply component is provided on the outside of the chamber (1) and is connected to the two ventilation plates (4). The bottom end of the sieve plate (7) is provided with a vibration mechanism.

2. The rice polishing machine according to claim 1, characterized in that, It also includes a cleaning assembly; the cleaning assembly includes an air pump (61), a diverter pipe (62) and two hoses (63), the air pump (61) is located on the right side of the chamber (1), the two hoses (63) are respectively connected to the ends of the two ventilation plates (4), the diverter pipe (62) is connected to the air outlet of the air pump (61), and the two air outlets are connected to the two hoses (63).

3. A rice polishing machine according to claim 1, characterized in that, A connecting plate (31) is connected between the two cleaning brushes (3), and a hydraulic cylinder (5) is vertically installed at the top of the chamber (1), and the telescopic rod is connected to the top of the connecting plate (31).

4. A rice polishing machine according to claim 1, characterized in that, Limiting grooves are provided on both the left and right walls of the chamber (1), and sliders are connected to both ends of the two cleaning brushes (3). The sliders on the same side are slidably connected to the inner wall of the limiting groove on the same side.

5. A rice polishing machine according to claim 1, characterized in that, The inner wall of the silo body (1) is connected to a limiting plate (71), and a spring (73) is connected between the limiting plate (71) and the sieve plate (7). The bottom end of the sieve plate (7) is connected to a limiting rod (72), which passes through the limiting plate (71) and the spring (73).

6. A rice polishing machine according to claim 1, characterized in that, The vibration mechanism includes a U-shaped frame (81), a vibration motor (82), and a guide plate (83). The U-shaped frame (81) is connected to the bottom end of the sieve cleaning brush (3). The vibration motor (82) is located on the bottom wall of the U-shaped frame (81). The guide plate (83) is connected between the left and right walls of the U-shaped frame (81) and is located above the vibration motor (82).

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