Impurity screening and removing equipment for rice processing
By combining the inclined reciprocating motion screen and the rolling unblocking component with the fan component, the problem of low screening efficiency and insufficient precision in traditional rice processing equipment is solved, achieving efficient, stable, and low-maintenance impurity removal and improving the quality of rice products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUILIN LVZHIYUAN RICE IND CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional rice processing equipment suffers from low screening efficiency, insufficient precision, and complex operation, making it difficult to meet the high efficiency and high quality requirements of the modern rice processing industry.
An impurity screening and removal device was designed, comprising an inclined reciprocating screen and a rolling unblocking component driven by a screw mechanism. Combined with a blower component, it provides airflow for impurity removal, preventing rice particles from clogging the screen and improving screening continuity and accuracy.
It achieves efficient, stable, and low-maintenance impurity removal, improving the quality and purity of rice products.
Smart Images
Figure CN224486689U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rice processing equipment technology, and more specifically, to an impurity screening and removal device for rice processing. Background Technology
[0002] In rice processing, the screening and removal of impurities is a crucial step affecting product quality. Traditional screening equipment often suffers from low efficiency, insufficient precision, and complex operation, failing to meet the demands of the modern rice processing industry for high efficiency and high quality. Therefore, this application proposes a novel design scheme aimed at addressing the shortcomings of existing technologies while improving the overall performance of the equipment. Through optimized structural design and the introduction of innovative technologies, this equipment achieves more efficient impurity separation and possesses greater stability and adaptability, providing reliable technical support for the rice processing industry. Utility Model Content
[0003] This application provides an impurity screening and removal device for rice processing, including a shell screening assembly, a de-clogging assembly, and a blower assembly. The upper surface of the shell has a discharge hopper extending along its width, and an air duct is provided near the discharge hopper, penetrating two opposite surfaces of the shell. The screening assembly includes an inclined screen and a power device for driving the screen to reciprocate. Guide posts extend outward from both sides of the screen, extending into pre-set slots in the shell to form a sliding fit, with the screen's feed end higher than its discharge end. The de-clogging assembly includes rollers abutting the lower surface of the screen and two sets of screw mechanisms symmetrically arranged on the outer side of the shell. Each screw mechanism includes a slider with slots for the rollers to extend into and move up and down. Spring-loaded retaining blocks are installed in the slots, and the rollers abut against the lower surface of the screen due to the spring force. The slider drives the rollers to roll along the lower surface of the screen to prevent rice from clogging the screen mesh. The assembly is installed at the air inlet of the air duct on the outer side of the shell.
[0004] In some embodiments, the screen is tilted at an angle of 5° to 10°.
[0005] In some embodiments, the extrusion surface of the roller is designed with a micro-convex texture or laser micro-textured treatment.
[0006] In some embodiments, the extrusion surface of the roller is made of polyurethane material with a Shore hardness of 75A to 85A.
[0007] In some embodiments, the slider reciprocates at a linear velocity of 0.1 to 0.3 m / s and a frequency of 10 to 20 times per minute.
[0008] In some embodiments, the slot includes a groove extending through opposite sides of the slider and a circular countersunk hole at the center of the upper surface of the slider.
[0009] In some embodiments, the fan assembly includes two sets of fans that blow air in the same direction, with a fan speed of 5 to 8 m / s.
[0010] In some embodiments, an inclined baffle is provided inside the housing, located below the air outlet of the air duct.
[0011] The screening and removal equipment of this application improves screening efficiency through the inclined reciprocating motion of the screen and innovatively designs a rolling anti-clogging component driven by a screw mechanism and held by a spring. This roller rolls close to the lower surface of the screen, effectively preventing rice particles from clogging the mesh and significantly improving the continuity and accuracy of screening. Combined with the air-powered impurity removal at the feed end by the blower component, the overall system achieves efficient, stable, and low-maintenance impurity removal, thus improving product quality.
[0012] Additional aspects and advantages of embodiments of this application 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 embodiments of this application. Attached Figure Description
[0013] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:
[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;
[0015] Figure 2 yes Figure 1 A schematic diagram of a half-section structure;
[0016] Figure 3 This is a schematic diagram of the connection and exploded structure of the threaded shaft-slider.
[0017] Explanation of main component symbols: Screening and removal equipment 100, outer shell (10), hopper (11), air duct (12), strip hole (13), activity space (14), screening assembly (20), screen (21), guide column (211), feed end (212), discharge end (213), power unit (22), unblocking assembly (30), roller (31), lead screw mechanism (32), slider (33), slot (331), chute (334), countersunk hole (335), spring (332), clamping block (333), mounting base (34), threaded rod (35), guide rod (36), rotary motor (37), fan assembly (40). Detailed Implementation
[0018] The embodiments of this application will be further described below with reference to the accompanying drawings. The same or similar reference numerals in the drawings denote the same or similar elements or elements having the same or similar functions throughout.
[0019] Furthermore, the embodiments of this application described below in conjunction with the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting this application.
[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0021] Please see Figure 1 , Figure 2 and Figure 3 This application provides a rice processing impurity screening and removal device (100), including a shell (10), a screening assembly (20), a blockage removal assembly, and a blower assembly (40). The upper surface of the shell (10) is provided with a discharge hopper (11) extending in the width direction, and an air duct (12) is provided near the discharge hopper (11), the air duct (12) penetrating two opposite surfaces of the shell (10). The screening assembly (20) includes an inclined screen (21) and a power device (22) for driving the screen (21) to reciprocate. Guide posts (211) extend outward on both sides of the screen (21), and the guide posts (211) extend into the pre-set strip holes (13) of the shell (10) to form a sliding fit, and the feed end (212) of the screen (21) is higher than the discharge end (213). The unblocking assembly includes a roller (31) that abuts against the lower surface of the screen (21) and two sets of lead screw mechanisms (32) symmetrically arranged on the outside of the housing (10). The lead screw mechanism (32) includes a slider (33). The slider (33) is provided with a slot (331) for the roller (31) to extend into and move up and down. A spring (332) and a retaining block (333) are provided in the slot (331). The roller (31) abuts against the lower surface of the screen (21) by the elastic force of the spring (332). The slider (33) drives the roller (31) to roll along the lower surface of the screen (21) to prevent rice from blocking the mesh of the screen (21). The fan assembly (40) is installed at the air inlet of the air duct (12) on the outside of the housing (10).
[0022] The screening and removal equipment (100) of this application improves screening efficiency through the inclined reciprocating motion of the screen (21), and innovatively designs a rolling anti-clogging component driven by a screw mechanism (32) and held by a spring (332). The roller (31) rolls close to the lower surface of the screen (21), effectively preventing rice particles from clogging the mesh and significantly improving the continuity and accuracy of screening. Combined with the wind-powered impurity removal at the feed end (212) by the blower assembly (40), the overall system achieves efficient, stable, and low-maintenance impurity removal, improving product quality.
[0023] For details, please continue reading Figure 1 and Figure 2 The outer shell (10) has a rectangular parallelepiped structure. The upper surface of the outer shell (10) is provided with a feeding hopper (11) extending along the width direction for feeding and distributing materials. The lower surface of the outer shell (10) is provided with a collecting hopper for collecting processed materials.
[0024] The sieving assembly (20) is used to sieve rice of different sizes and to remove impurities from the rice, thereby ensuring the quality and purity of the rice. The sieving assembly (20) includes a screen (21) and a power device (22) for driving the screen (21) to reciprocate. The two opposite sides of the screen (21) extend outward to form guide posts (211), which extend into the pre-set slots (13) in the outer casing (10) so that the screen (21) can reciprocate.
[0025] Please see Figure 2 The power unit (22) can be connected to the screen (21) directly or indirectly. For example, in the case of direct connection, a stepper motor or linear motor can be used to directly drive the screen (21) to move; while in the case of indirect connection, the power unit (22) can transmit power through some specially designed reciprocating mechanisms (such as crank mechanisms, disc mechanisms, etc.), thereby indirectly driving the screen (21) to reciprocate. Regardless of the method, the ultimate goal is to enable the screen (21) to move smoothly back and forth along a predetermined trajectory to ensure the smooth progress and efficient completion of the screening process.
[0026] Furthermore, to facilitate better rice sieving by the screen (21), the discharge end (213) of the screen (21) is designed to be lower than its feed end (212) to form an inclined setting with an angle of [5°, 10°]. This design facilitates the movement and separation of rice on the screen (21), improving sieving efficiency and effectiveness. This inclined setting ensures that rice flows more smoothly from the feed end (212) to the discharge end (213) during the sieving process, and also helps to more effectively separate rice grains of different sizes.
[0027] Please see Figure 1 and Figure 2 The unclogging component is used to clean the mesh of the screen (21) to prevent it from becoming clogged. The unclogging component includes a roller (31) and a screw mechanism (32). The roller (31) abuts against the lower surface of the screen (21) and can roll back and forth along the length of the screen (21). The rolling surface of the roller (31) can largely prevent rice grains from being crushed during operation. The extrusion surface of the roller (31) is made of polyurethane material with excellent elasticity and wear resistance. Its Shore hardness is recommended to be controlled between 75A and 85A. This can prevent rice grains from being crushed and can also generate a moderate extrusion effect through deformation. The surface adopts a micro-convex texture (height 0.2-0.5mm) design or laser micro-textured treatment to reduce impact damage to rice grains.
[0028] Please combine Figure 1 and Figure 3 Two sets of lead screw mechanisms (32) are symmetrically arranged at both ends of the roller (31). Specifically, these two sets of lead screw mechanisms (32) are installed on the outer surfaces of opposite sides of the housing (10), and the two ends of the roller (31) pass through the pre-designed movable space (14) on the housing (10) and are connected to the lead screw mechanism (32), thereby realizing the smooth reciprocating motion of the roller (31). Setting the lead screw mechanism (32) on the outer surface of the housing (10) can reduce the interference of rice particles on the operation of the lead screw mechanism (32) to a certain extent, thereby improving the working efficiency and reliability of the entire unblocking assembly.
[0029] The lead screw mechanism (32) includes a slider (33), mounting bases (34), a threaded rod (35), a guide rod (36), and a rotary motor (37). Two mounting bases (34) are respectively located at both ends of the threaded rod (35), serving to support and fix it, while allowing the threaded rod (35) to rotate within them. The threaded rod (35), as the core transmission component, can rotate freely around its own axis, thereby achieving power transmission. The guide rod (36), arranged parallel to the threaded rod (35), is fixed at both ends to the two mounting bases (34), ensuring its position remains stable. The main function of the guide rod (36) is to provide precise linear motion guidance for the slider (33), preventing the slider (33) from deviating or wobbling during operation.
[0030] The two ends of the roller (31) are respectively installed on the two sliders (33). The threaded rod (35) and the guide rod (36) pass through the slider (33). The slider (33) is threadedly connected to the threaded rod (35). The slider (33) can slide relative to the guide rod (36).
[0031] Two mounting bases (34) are located at both ends of the threaded rod (35), which is rotatable. The guide rod (36) is parallel to the threaded rod (35) and its two ends are fixed on the two mounting bases (34). A rotary motor (37) is mounted on the outside of one of the mounting bases (34), and its output shaft is connected to the threaded rod (35).
[0032] The slider (33) has a slot (331) for the roller (31) to slide up and down. Specifically, the upper surface of the slider (33) has a slot (331), which is composed of a sliding groove (334) that passes through the opposite sides of the slider (33) and a countersunk hole (335) at the center of the upper surface. A spring (332) and a retaining block (333) are installed in the countersunk hole (335). The upper surface of the retaining block (333) matches the connecting surface of the roller (31) to ensure that the two can fit tightly. The upper surface of the slider (33) is provided with a top cover 336 to prevent the slider (33) or the roller (31) from sliding out.
[0033] When the entire device is in operation, the roller (31) uses the elastic force of the spring (332) to push the clamping block (333) upward. This ensures that the roller (31) remains tightly attached to the lower surface of the screen (21) under the action of the spring (332). Even when the screen (21) reciprocates, the roller (31) can flexibly adapt to changes in the slope of the screen (21), ensuring the stable and efficient operation of the entire device.
[0034] The slider (33) moves at a linear speed of 0.1 to 0.3 m / s. This speed can both clear the blockage of the screen (21) holes through the roller (31) effect and prevent the rice from breaking due to overheating or impact caused by friction. The reciprocating frequency of the slider (33) driven by the screw mechanism (32) should be controlled at 10 to 20 times per minute.
[0035] The fan assembly (40) is used to provide airflow support and can effectively separate dust and light impurities mixed in the rice. The outer casing (10) is provided with air ducts (12) extending out from two opposite sides. The air ducts (12) are close to the area where the feed hopper (11) falls. The fan assembly (40) is installed at the air inlet of the air duct (12) on the outer side of the outer casing (10). The fan assembly (40) consists of two sets of fans that work together to enhance the airflow intensity and coverage.
[0036] An inclined guide plate 15 is provided on the inner side of the outer casing (10) near the air outlet of the air duct (12). Its function is to guide the rice grains falling from the fan to the surface of the screen (21), thereby further improving the screening effect and increasing the overall working efficiency. The fan speed range of the blower assembly 40 is 5-8 m / s. This wind speed can efficiently separate dust and light impurities (such as rice husks) and prevent the airflow from being too strong and blowing the rice grains away from the screen (21).
[0037] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one feature. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.
[0039] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.
Claims
1. A rice processing impurity screening and removal device, characterized in that, include: The outer shell (10) has a feeding hopper (11) extending in the width direction on its upper surface and an air duct (12) near the feeding hopper (11) that passes through two opposite surfaces of the outer shell (10). The screening assembly (20) includes an inclined screen (21) and a power device (22) for driving the screen (21) to reciprocate. Guide posts (211) extend outward on both sides of the screen (21). The guide posts (211) extend into the pre-set strip holes (13) of the outer shell (10) to form a sliding fit. The feed end (212) of the screen (21) is higher than the discharge end (213). The unblocking assembly includes a roller (31) that abuts against the lower surface of the screen (21) and two sets of screw mechanisms (32) symmetrically arranged on the outside of the outer shell (10). The screw mechanism (32) includes a slider (33), which is provided with a slot (331) for the roller (31) to extend into and move up and down. A spring (332) and a retaining block (333) are provided in the slot (331). The roller (31) abuts against the lower surface of the screen (21) by the elastic force of the spring (332). The slider (33) drives the roller (31) to roll along the lower surface of the screen (21) to prevent rice from blocking the mesh of the screen (21). The fan assembly (40) is installed at the air inlet of the air duct (12) on the outside of the housing (10).
2. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, The tilt angle of the screen (21) is 5° to 10°.
3. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, The extrusion surface of the roller (31) is designed with a micro-convex texture or laser micro-texturation.
4. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, The extrusion surface of the roller (31) is made of polyurethane material with a Shore hardness of 75A to 85A.
5. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, The slider (33) reciprocates at a linear velocity of 0.1 to 0.3 m / s and a frequency of 10 to 20 times per minute.
6. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, The slot (331) includes a groove (334) that runs through the opposite sides of the slider (33) and a circular countersunk hole (335) opened at the center of the upper surface of the slider (33).
7. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, The fan assembly (40) includes two sets of fans that blow air in the same direction, with a fan speed of 5 to 8 m / s.
8. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, An inclined baffle is provided inside the outer casing (10), and the baffle is located below the air outlet of the air duct (12).
9. The impurity screening and removal equipment for rice processing according to claim 1, characterized in that, The top of the slider (33) is provided with a cap to prevent it from falling off.