Screening device of rice screening machine

Abstract

The utility model discloses a screening device of a rice screening machine, and belongs to the technical field of rice processing. The winnowing device comprises supporting legs, spring supporting mechanisms, a screen box assembly, an adjusting assembly and a fixing plate assembly, the screen box assembly is installed at the top ends of the supporting legs through the spring supporting mechanisms and comprises a screen box body, a vibration motor is installed on the bottom face of the outer wall of the screen box assembly, and a winnowing motor is installed on one side of the inner wall of the screen box body; a box cover mechanism is arranged at the top end of the screen box body in a covering mode and comprises a box cover body, and the number of the fixing plate assemblies is two. Through cooperation of the winnowing motor, the box cover mechanism, the adjusting assembly and the fixing plate assembly, the winnowing motor produces directional airflow to blow away light impurities, impurities with different specific gravities and particle sizes are accurately separated, the screening efficiency and purity are greatly improved, and the subsequent manual picking procedure is reduced; the upper-layer first screen intercepts large-particle impurities, particles are crushed to complete coarse screening, the lower-layer second screen is combined with winnowing fine screening, and it is guaranteed that classified screening is orderly and efficient.

Description

Technical Field

[0001] This utility model relates to the field of rice processing technology, specifically to a sieving device for a rice screening machine. Background Technology

[0002] In the rice processing process, the screening device is a crucial component of the rice screening machine. After rice is harvested from the field, it will contain various impurities, such as rice husks, stones, empty grains, and other foreign objects. As people's requirements for rice quality continue to increase, it has become extremely important to accurately and efficiently remove these impurities and grade the rice.

[0003] When processing rice, existing screening devices require grading the rice by separating it into different grades due to the varying particle sizes. However, current screening devices can only perform one-stage screening at a time, necessitating multiple repeated screening steps, which greatly inconveniences the rice screening process. Utility Model Content

[0004] The purpose of this utility model is to provide a sieving device for a rice screening machine. Through the cooperation of a wind-separating motor, a box cover mechanism, an adjustment component, and a fixing plate component, the wind-separating motor generates a directional airflow to blow away light impurities, accurately separating impurities of different specific gravities and particle sizes, greatly improving screening efficiency and purity, and reducing subsequent manual sorting processes.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model is a sieving device for a rice screening machine, including a support leg, a spring support mechanism, a sieve box assembly, an adjustment assembly, and a fixing plate assembly. The sieve box assembly is installed on the top of the support leg through the spring support mechanism. The sieve box assembly includes a sieve box body. A first discharge hopper and a second discharge hopper are connected to one side of the bottom end of the sieve box body. A baffle is provided between the first discharge hopper and the second discharge hopper. A vibration motor is installed on the bottom surface of the outer wall of the sieve box assembly. An air separation motor is installed on one side of the inner wall of the sieve box body. A box cover mechanism is provided on the top of the sieve box body. The box cover mechanism includes a box cover body. A feed hopper is connected to one side of the top surface of the box cover body. A locking block is arranged around the inner wall of the box cover body.

[0007] There are two fixed plate assemblies, which are arranged vertically on one side of the inner wall of the screen box assembly. A second screen is connected between the two fixed plate assemblies, and a first screen is connected to the top of the upper fixed plate assembly. The fixed plate assembly includes a fixed frame, which is U-shaped. A connecting plate is provided between the two extended ends of the fixed frame. A second insertion hole is opened on each of the two extended ends. A first insertion hole is opened at the bottom end of the fixed frame. The adjustment assembly includes a clamping plate. The outer wall of the clamping plate abuts against one side of the inner wall of the screen box body. An insertion rod is provided at the bottom end of the clamping plate, and an insertion rod is inserted into one end of the clamping plate.

[0008] Furthermore, there are four spring support mechanisms, which are located at the four corners of the top of the support legs, and the screen box body is vertically installed on the top of the four spring support mechanisms.

[0009] Furthermore, the screen box body is a rectangular box with an open top. Two discharge ports are opened at one end of the bottom surface of the screen box body. The first discharge hopper and the second discharge hopper are respectively connected to the two discharge ports. An installation port is opened at the other end of the inner wall of the screen box assembly, and the air classifier motor is fitted and installed in the installation port.

[0010] Furthermore, a feed inlet is provided at one end of the top surface of the box cover body, and the bottom end of the feed hopper is connected to the discharge outlet. The locking block extends in a rectangular frame shape at the bottom end of the box cover body.

[0011] Furthermore, the outer wall of the card block abuts against the top of the opening of the screen box body, the bottom end of the card block abuts against the top of the card plate, and the outer wall of the box cover body is provided with an outer edge, the bottom surface of the outer edge abuts against the top of the screen box body.

[0012] Furthermore, the top two sides of the card plate are provided with extension ends, the cross-section of the extension ends is inclined, the bottom two ends of the card plate are provided with insertion rods, the other end of the card plate is provided with an adjustment groove, and one end of the insertion rod is inserted through and inserted into the adjustment groove.

[0013] Furthermore, the positions of the connecting plate and the first insertion hole on the fixed frame match the positions of the insertion rod and the connecting rod on the card plate. The bottom end of the insertion rod passes through the second insertion hole on the two fixed plate assemblies in sequence, and the bottom end of the connecting rod passes through the first insertion hole on the two fixed plate assemblies in sequence.

[0014] Furthermore, the first screen is located between the adjustment component and the upper fixed plate component, and a placement gap is provided between the two fixed plate components. The bottom surface of the second screen abuts against the top surface of the lower fixed plate component, and the bottom surface of the lower fixed plate component is located above the air separator motor.

[0015] This utility model has the following beneficial effects:

[0016] This invention utilizes a combination of an air-separating motor, a box cover mechanism, an adjustment component, and a fixing plate assembly. The air-separating motor generates a directional airflow to blow away light impurities, accurately separating impurities of different specific gravities and particle sizes, greatly improving screening efficiency and purity, and reducing subsequent manual sorting processes. The upper first screen intercepts large particles and broken grains for coarse screening, while the lower second screen, combined with air separation, performs fine screening, ensuring orderly and efficient grading and precise material separation to meet diverse processing needs. Furthermore, it facilitates maintenance and cleaning, allowing for easy opening of the box cover mechanism to remove the insert rod, clamping plate, and fixing plate assembly for screen inspection and cleaning. The operation is simple and efficient, improving the efficiency of the rice screening and processing industry.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the screening device.

[0019] Figure 2 This is a schematic diagram of the internal structure of the screening device;

[0020] Figure 3 A schematic diagram of the structure of the adjusting component, the first screen, the fixing plate assembly, and the second screen;

[0021] Figure 4 This is a structural diagram of the screen box assembly, the box cover mechanism, the adjusting assembly, and the fixing plate assembly.

[0022] In the diagram: 1. Support leg; 2. Spring support mechanism; 3. Screen box assembly; 301. Screen box body; 302. First discharge hopper; 303. Second discharge hopper; 4. Vibrating motor; 5. Air separator motor; 6. Box cover mechanism; 601. Box cover body; 602. Feed hopper; 603. Locking block; 7. Adjustment assembly; 701. Locking plate; 702. Insert rod; 703. Insertion rod; 8. First screen; 9. Fixing plate assembly; 901. Fixing frame; 902. Connecting plate; 903. First insertion hole; 904. Second insertion hole; 10. Second screen. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4This utility model provides a technical solution: a rice screening device, including a support leg 1, a spring support mechanism 2, a screen box assembly 3, an adjustment assembly 7, and a fixing plate assembly 9. The screen box assembly 3 is installed on the top of the support leg 1 through the spring support mechanism 2. There are four spring support mechanisms 2, which are located at the four corners of the top of the support leg 1. Through the elastic buffering and support efficiency of the spring support mechanism 2, the vibration impact generated by the vibrating motor 4 can be effectively absorbed during the screening operation, avoiding structural damage or screening accuracy deviation caused by excessive shaking or uneven force. The screen box body 301 is vertically arranged on the four spring supports. At the top of mechanism 2, the screen box assembly 3 includes a screen box body 301. A first discharge hopper 302 and a second discharge hopper 303 are connected to one side of the bottom of the screen box body 301. A baffle is provided between the first discharge hopper 302 and the second discharge hopper 303. A vibration motor 4 is installed on the bottom surface of the outer wall of the screen box assembly 3. When the vibration motor 4 operates, it generates vibrations of a specific frequency and amplitude, causing the material inside the screen box to jump, roll, and shift violently on the screen mesh. Under the combined action of gravity and vibration, materials smaller than the screen aperture size fall down, initiating the initial screening and separation process. An air-separating motor 5 is installed on one side of the inner wall of the screen box body 301. The screen box body 301 is a rectangular box with an open top. The sieve box assembly 301 has two discharge ports at one end of its bottom surface. A first discharge hopper 302 and a second discharge hopper 303 are respectively connected to the two discharge ports. An installation port is provided at the other end of the inner wall of the sieve box assembly 3. An air-separating motor 5 is fitted into the installation port. When the air-separating motor 5 is turned on, the directional airflow it generates travels through the box. The airflow generated by the air-separating motor 5 can directly blow lighter impurities such as rice husks and chaff away from the sieve surface, quickly performing the sieving process. A cover mechanism 6 is provided at the top of the sieve box assembly 301. The cover mechanism 6 includes a cover body 601. One side of the top surface of the cover body 601 is connected to the feed hopper 602. A feed inlet is provided at one end of the screen, and the bottom end of the feed hopper 602 is connected to the discharge outlet. The feed hopper 602 smoothly introduces the rice to be screened through the feed inlet, ensuring a stable and orderly supply of materials. The clamping block 603 extends in a rectangular frame shape at the bottom end of the cover body 601. The clamping block 603 is arranged around the inner wall of the cover body 601. The outer wall of the clamping block 603 abuts against the top of the opening of the screen body 301. The bottom end of the clamping block 603 abuts against the top of the clamping plate 701. The outer wall of the cover body 601 is provided with an outer edge. The bottom surface of the outer edge abuts against the top of the screen body 301. The vibration motor 4 and the air classifier motor 5 mentioned above are existing technologies and will not be described in detail.

[0025] There are two fixing plate assemblies 9, which are arranged vertically on one side of the inner wall of the screen box assembly 3. The upper fixing plate assembly 9 overlaps with the top surface of the lower fixing plate assembly 9. A second screen 10 is overlapped between the two fixing plate assemblies 9 to ensure the stability of the screen placement and allow the material to pass through different screen layers in an orderly manner during the screening process, achieving the goal of graded screening. A first screen 8 is overlapped at the top of the upper fixing plate assembly 9. The fixing plate assembly 9 includes a fixing frame 901. The fixed frame 901 is U-shaped, with a connecting plate 902 between its two extended ends. Each of the two extended ends has a second insertion hole 904, and the bottom of the fixed frame 901 has a first insertion hole 903. The positions of the connecting plate 902 and the first insertion hole 903 on the fixed frame 901 match the positions of the insertion rod 702 and the connecting rod 703 on the clamping plate 701. The bottom end of the insertion rod 702 passes sequentially through the second insertion holes 904 on the two fixed plate assemblies 904. The bottom end of the connecting rod 702 passes through the second insertion holes 904 on the two fixed plate assemblies 904. The bottom end of the 03 is sequentially inserted into the first insertion hole 903 on the two fixed plate assemblies 9. The adjusting assembly 7 includes a clamping plate 701. The outer wall of the clamping plate 701 abuts against one side of the inner wall of the screen box body 301. An insertion rod 702 is provided at the bottom end of the clamping plate 701. An insertion rod 703 is inserted into one end of the clamping plate 701. Extension ends are provided on both sides of the top end of the clamping plate 701. The cross-section of the extension ends is inclined. Insertion rods 702 are extended at both ends of the bottom surface of the clamping plate 701. An adjusting groove is opened at the other end of the clamping plate 701. The insertion rod 702 is inserted into the other end of the clamping plate 701. 03 One end is inserted into the adjustment groove, which firmly binds the two fixed plate components 9 and the adjustment component 7 to form a stable whole, preventing loosening or displacement under conditions such as vibration and material impact, and laying a solid foundation for the long-term stable operation of the screen. The first screen 8 is located between the adjustment component 7 and the upper fixed plate component 9. There is a placement gap between the two fixed plate components 9. The bottom surface of the second screen 10 abuts against the top surface of the lower fixed plate component 9. The bottom surface of the lower fixed plate component 9 is located above the air classifier motor 5.

[0026] Rice to be screened falls into the screen box body 301 through the feed hopper 602. The vibration motor 4 starts and operates at a set frequency and amplitude, generating continuous vibration that is transmitted to the screen box body 301 and its internal components. This causes the rice material to start jumping, rolling, and shifting violently on the first screen 8. Under the action of gravity and the assistance of vibration, smaller particles, impurities, and fragments smaller than the screen holes of the first screen 8 pass through the screen holes and fall downwards. The material that has been initially screened by the first screen 8 continues to fall to the second screen 10. At this time, the air classifier motor 5 on one side of the inner wall of the screen box body 301 starts working, creating a directional airflow that shuttles through the box. With the help of the airflow, lighter impurities such as rice husks and shriveled grains are directly blown off the screen surface and float with the airflow, separating from the heavier qualified rice and the material to be retained. The material remaining on the second screen 10 continues to be screened on the screen under the combined action of the airflow from the air classifier motor 5 and the vibration motor 4. Impurities and other materials with different screen sizes fall further down the screen 10. Finally, qualified rice and materials that meet the retention standards are retained on the screen 10 according to its specifications. Different types of materials are collected separately through the first discharge hopper 302 and the second discharge hopper 303 connected to the bottom of the screen box body 301. The baffle between the first discharge hopper 302 and the second discharge hopper 303 ensures that the materials in each discharge channel are clearly distinguished, thus completing the entire screening process. When it is necessary to clean and maintain the screen, open the box cover mechanism 6, then pull out the insert rod 702, and remove the card plate 701 from the two fixed plate assemblies 9. The insert rod 702 is also removed from the second insert hole 904 in sequence. Remove the fixed plate assembly 9 set at the top, and then take out the first screen 8 and the second screen 10 for cleaning and maintenance. After the cleaning and maintenance is completed, the reverse operation can be performed for installation. Then, the card block 603 at the bottom of the box cover body 601 is snapped into the top of the card plate 701 to securely position the card plate 701.

[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sieving device for a rice screening machine, comprising a support leg (1), a spring support mechanism (2), and a sieve box assembly (3), characterized in that: The top of the support leg (1) is equipped with a screen box assembly (3) via a spring support mechanism (2). The screen box assembly (3) includes a screen box body (301). The bottom side of the screen box body (301) is connected to a first discharge hopper (302) and a second discharge hopper (303). A baffle is provided between the first discharge hopper (302) and the second discharge hopper (303). A vibration motor (4) is installed on the bottom surface of the outer wall of the screen box assembly (3). An air separator motor (5) is installed on one side of the inner wall of the screen box body (301). A box cover mechanism (6) is provided on the top of the screen box body (301). The box cover mechanism (6) includes a box cover body (601). The top side of the box cover body (601) is connected to a feed hopper (602). A locking block (603) is arranged around the inner wall of the box cover body (601). It also includes an adjusting component (7) and a fixing plate component (9). There are two fixing plate components (9), which are arranged vertically on one side of the inner wall of the screen box component (3). A second screen (10) is overlapped between the two fixing plate components (9). A first screen (8) is overlapped at the top of the upper fixing plate component (9). The fixing plate component (9) includes a fixing frame (901), which is U-shaped. A connecting plate (902) is provided between the two extension ends of the frame (901), and a second insertion hole (904) is provided on each of the two extension ends. A first insertion hole (903) is provided at the bottom end of the fixed frame (901). The adjusting component (7) includes a card plate (701). The outer wall of the card plate (701) is abutted against one side of the inner wall of the screen box body (301). A plug rod (702) is provided at the bottom end of the card plate (701). A plug rod (703) is inserted into one end of the card plate (701).

2. The sieving device of a rice screening machine according to claim 1, characterized in that, The number of spring support mechanisms (2) is four, and the four spring support mechanisms (2) are located at the four corners of the top of the support leg (1). The screen box body (301) is vertically arranged on the top of the four spring support mechanisms (2).

3. The sieving device of a rice screening machine according to claim 1, characterized in that, The screen box body (301) is a rectangular box with an open top. Two discharge ports are opened at one end of the bottom surface of the screen box body (301). The first discharge hopper (302) and the second discharge hopper (303) are respectively connected to the two discharge ports. An installation port is opened at the other end of the inner wall of the screen box assembly (3). The air separation motor (5) is fitted and installed in the installation port.

4. The sieving device of a rice screening machine according to claim 1, characterized in that, The top surface of the box cover body (601) is provided with a feed inlet, the bottom end of the feed hopper (602) is connected to the discharge outlet, and the card block (603) is a rectangular frame extending from the bottom end of the box cover body (601).

5. The sieving device of a rice screening machine according to claim 4, characterized in that, The outer wall of the card block (603) abuts against the top of the opening of the screen box body (301), the bottom end of the card block (603) abuts against the top of the card plate (701), and the outer wall of the box cover body (601) is provided with an outer edge, the bottom surface of the outer edge abuts against the top of the screen box body (301).

6. The sieving device of a rice screening machine according to claim 1, characterized in that, The card plate (701) has extension ends on both sides of its top end, and the cross-section of the extension ends is inclined. The card plate (701) has insertion rods (702) extending from both ends of its bottom surface. The card plate (701) has an adjustment groove at the other end, and one end of the insertion rod (703) is inserted into the adjustment groove.

7. The sieving device of a rice screening machine according to claim 6, characterized in that, The positions of the connecting plate (902) and the first insertion hole (903) on the fixed frame (901) match the positions of the insertion rod (702) and the plug rod (703) on the card plate (701). The bottom end of the insertion rod (702) passes through the second insertion hole (904) on the two fixed plate assemblies (9) in sequence, and the bottom end of the plug rod (703) passes through the first insertion hole (903) on the two fixed plate assemblies (9) in sequence.

8. The sieving device of a rice screening machine according to claim 7, characterized in that, The first screen (8) is located between the adjustment component (7) and the upper fixed plate component (9). There is a gap between the two fixed plate components (9). The bottom surface of the second screen (10) abuts against the top surface of the lower fixed plate component (9). The bottom surface of the lower fixed plate component (9) is located above the air separator motor (5).

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