A quick grading and screening device for broken rice

The cleaning mechanism, which combines airflow and mechanical vibration, solves the problem of screen clogging and achieves efficient, automated, and accurate grading and screening of broken rice.

CN224308981UActive Publication Date: 2026-06-02CHONGQING YULI TOWNSHIP RICE IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHONGQING YULI TOWNSHIP RICE IND CO LTD
Filing Date
2025-06-20
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing broken rice grading and screening devices are prone to clogging, resulting in uneven screening and frequent manual intervention, making effective grading impossible.

Method used

The cleaning mechanism employs a dual action of airflow and mechanical vibration, including an air jet assembly and a hammer assembly. It uses high-pressure airflow and rubber hammers to clean the screen, combined with mechanical vibration to assist in clearing screen hole blockages.

Benefits of technology

It effectively improves the screen clogging removal rate, realizes efficient broken rice grading and screening without manual intervention, and ensures accurate separation of broken rice of different grades.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a rapid grading and screening device for broken rice, belonging to the technical field. It includes: a housing and a cleaning mechanism; the cleaning mechanism includes an air jet assembly and a striking assembly; the air jet assembly includes a movable shell and a nozzle; the striking assembly includes a rotating rod, an arc-shaped frame, and a hammering column. Driven by an air pump, high-pressure airflow is blown onto the lower surface of the screen through the nozzle, cleaning the clogged screen with backflow airflow. A first motor drives a threaded rod to rotate, causing the movable shell to reciprocate linearly below the screen, driving the nozzle for scanning cleaning. A second motor drives the rotating rod to reciprocate at an angle, causing the arc-shaped frame and hammering column to oscillate reciprocally. The rubber hammering column periodically strikes the lower surface of the screen, using vibrational inertia to help dislodge the broken rice clogged in the screen holes. Through the dual action of airflow and mechanical vibration, the screen clogging removal rate is effectively improved without manual intervention.
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Description

Technical Field

[0001] This utility model specifically relates to a rapid grading and screening device for broken rice, belonging to the field of rice screening technology. Background Technology

[0002] Paddy processing is the process of removing the husk and bran from paddy rice to produce edible rice. Its core purpose is to separate the endosperm from the husk and bran with minimal damage, preserving the rice's nutrition and flavor. Paddy processing consists of three main steps: cleaning, hulling, and milling. Milling involves mechanically removing the bran from the rice through friction or grinding, producing rice of varying fineness. Broken rice is a byproduct of milling; its composition is identical to whole grains, but it is less marketable. Most broken rice is used as animal feed or for brewing, with low added value. However, some new nutritional products have been developed in recent years, showing promising market prospects.

[0003] Currently, existing broken rice rapid grading and screening devices mainly use sieves to screen rice. During the broken rice grading and screening process, sieve clogging is a common problem. Usually, because broken rice is irregular in shape, the edges of the broken rice are sharp or long strips, which easily get stuck in the sieve holes. The sieve holes are easily blocked by broken rice stuck laterally. The blocked sieve holes cannot effectively pass broken rice, resulting in a large amount of qualified broken rice remaining on the sieve surface, requiring repeated screening or manual intervention. After clogging, broken rice of different grades (whole grains, large broken rice, and small broken rice) are mixed and piled up, making it impossible to grade according to the preset hole size. Some broken rice is forced into the wrong outlet due to clogging (such as large broken rice mixed into the small broken rice bin). Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a rapid grading and screening device for broken rice, which effectively improves the screen clogging removal rate through the dual action of airflow and mechanical vibration, without the need for manual intervention.

[0005] A rapid grading and screening device for broken rice includes: a housing and a cleaning mechanism;

[0006] A cleaning mechanism includes a jet assembly and a tapping assembly, wherein the jet assembly is used to clean a clogged screening assembly by blowing air against the airflow, and the tapping assembly is used to assist the jet assembly in cleaning the screening assembly by tapping.

[0007] The jet assembly includes a movable housing and nozzles, with multiple sets of nozzles internally disposed at the top of the movable housing;

[0008] The striking assembly includes a rotating rod, an arc-shaped frame, and a hammering post. Multiple sets of the arc-shaped frames are arranged at equal intervals on the outside of the rotating rod, and the hammering post is located inside the arc-shaped frame. The hammering post is made of rubber.

[0009] Furthermore, a feed shell is provided through the top of the box, a control panel is provided on the back of the box, and multiple sets of discharge shells are arranged in an array on one side of the box.

[0010] Furthermore, the inner wall of the box has multiple sets of guide grooves, and an installation frame is movably arranged between two sets of guide grooves. A screen is embedded inside the installation frame, and the screen and the movable shell are arranged alternately up and down. An opening and closing door is provided on the front of the box.

[0011] Furthermore, an assembly shell is provided on one side of the housing, and a threaded rod is rotatably provided inside the assembly shell. A guide rod is provided inside the assembly shell below the threaded rod. A No. 1 motor is provided on the front of the assembly shell, and the shaft of the output end of the No. 1 motor is connected to one end of the threaded rod.

[0012] Furthermore, a shaped rod is threaded through the outer side of the threaded rod, and the shaped rod is movably sleeved on the outside of the guide rod. The shaped rod is designed in the shape of an "E".

[0013] Furthermore, an air pump is provided on one side of the irregularly shaped rod, and an air supply pipe is provided at the air outlet of the air pump, which is connected to the interior of the movable housing.

[0014] Furthermore, a limiting rod is provided at the bottom end of the irregular rod, a spring is provided on the outside of the limiting rod, and a positioning rod is movably sleeved on the outside of the limiting rod. The positioning rod is designed in a "U" shape and can penetrate the irregular rod and be inserted into the movable shell.

[0015] Furthermore, the rotating rod is rotatably mounted at the bottom of the movable shell, and a second motor is mounted at the bottom of the movable shell. The shaft of the output end of the second motor is connected to one end of the rotating rod, and bolts are threaded inside the multiple sets of arc-shaped frames.

[0016] Beneficial effects:

[0017] Equipped with a cleaning mechanism driven by an air pump, high-pressure airflow is delivered to the moving housing via an air supply pipe. The high-pressure airflow is then blown onto the lower surface of the screen through nozzles, cleaning the clogged screen with backflow airflow. This directly impacts the blockages in the screen holes. A first motor drives a threaded rod to rotate, causing the moving housing to reciprocate linearly below the screen, which in turn drives the nozzles to perform scanning cleaning. A second motor drives a rotating rod to reciprocate at an angle, causing the arc-shaped frame and hammer column to swing back and forth. The rubber hammer column periodically strikes the lower surface of the screen, using the inertial force of vibration to help dislodge the broken rice blocking the screen holes. Through the dual action of airflow and mechanical vibration, the screen blockage removal rate is effectively improved without manual intervention.

[0018] By incorporating components such as positioning rods, the movable shell is inserted into the assembly slot on one side of the irregular rod. At this point, the pulling force on the positioning rod is released, and the "U"-shaped positioning rod is guided by the limiting rod. The elastic squeezing force of the spring on the outer side of the limiting rod allows the positioning rod to be inserted into the corresponding hole of the movable shell, thus assembling the movable shell and the irregular rod. This facilitates the disassembly and maintenance of the movable shell in the future. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the overall rear structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the box body of this utility model;

[0022] Figure 4 This is a schematic diagram of the assembly shell structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the threaded rod and guide rod structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the irregular rod structure of this utility model;

[0025] Figure 7 This is a schematic diagram of the arc-shaped frame structure of this utility model;

[0026] Figure 8 In this utility model Figure 5 A magnified view of the local structure at point A.

[0027] In the diagram: 1. Box body; 2. Feed shell; 3. Mounting frame; 4. Screen; 5. Opening door; 6. Control panel; 7. Discharge shell; 8. Assembly shell; 9. Threaded rod; 10. Motor No. 1; 11. Guide rod; 12. Irregular rod; 13. Air pump; 14. Air supply pipe; 15. Moving shell; 16. Limiting rod; 17. Spring; 18. Positioning rod; 19. Nozzle; 20. Rotating rod; 21. Arc frame; 22. Hammering column; 23. Bolt; 24. Motor No. 2. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a device for rapid grading and screening of broken rice;

[0030] Includes: housing 1 and cleaning mechanism;

[0031] The cleaning mechanism includes an air jet assembly and a tapping assembly. The air jet assembly is used to clean the clogged screening assembly by blowing air with a reverse airflow, and the tapping assembly is used to assist the air jet assembly in cleaning the screening assembly by tapping.

[0032] The jet assembly includes a movable housing 15 and nozzles 19. Multiple sets of nozzles 19 are internally disposed at the top of the movable housing 15. An air pump 13 is disposed on one side of the irregular rod 12. An air supply pipe 14 is disposed at the air outlet end of the air pump 13 and is internally connected to the movable housing 15.

[0033] The striking assembly includes a rotating rod 20, an arc frame 21, and a hammering column 22. Multiple sets of arc frames 21 are arrayed at equal intervals on the outside of the rotating rod 20. The hammering column 22 is located inside the arc frame 21 and is made of rubber. The rotating rod 20 is rotatably mounted at the bottom of the movable housing 15. A second motor 24 is mounted at the bottom of the movable housing 15. The shaft of the output end of the second motor 24 is connected to one end of the rotating rod 20. Bolts 23 are threaded inside the multiple sets of arc frames 21.

[0034] An assembly shell 8 is provided on one side of the housing 1. A threaded rod 9 is rotatably provided inside the assembly shell 8. A guide rod 11 is provided inside the assembly shell 8 below the threaded rod 9. A No. 1 motor 10 is provided on the front of the assembly shell 8. The shaft of the No. 1 motor 10 is connected to one end of the threaded rod 9. A special-shaped rod 12 is threaded through the outer side of the threaded rod 9. The special-shaped rod 12 is movably sleeved on the outside of the guide rod 11. The special-shaped rod 12 is designed in the shape of an "E".

[0035] The air supply pipe 14 is used to internally connect the movable shell 15 and the air pump 13. Multiple sets of nozzles 19 are arranged horizontally at the top of the movable shell 15. Driven by the air pump 13, the air supply pipe 14 can deliver high-pressure airflow into the movable shell 15. The nozzles 19 blow the high-pressure airflow toward the lower surface of the screen 4 to clean the clogged screen 4 by backflushing airflow, directly impacting the screen hole blockage.

[0036] The "E"-shaped design of the irregular rod 12 ensures stable engagement with the threaded rod 9, and works with the guide rod 11 to achieve horizontal reciprocating movement. The threaded rod 9 is driven by the No. 1 motor 10 to rotate, and the threaded rod 9 can move the threaded housing 15 reciprocating linearly below the screen 4, driving the nozzle 19 to perform scanning cleaning.

[0037] One end of the rotating rod 20 is connected to the shaft of the output end of the second motor 24. When the second motor 24 drives the rotating rod 20, it can reciprocate and rotate at an angle, thereby driving the arc frame 21 and the hammer column 22 to swing back and forth. The rubber hammer column 22 can periodically strike the lower surface of the screen 4, and the vibration inertial force can help the broken rice blocked in the screen holes to fall off. Multiple sets of arc frames 21 are movably sleeved on the outside of the rotating rod 20. The rotating rod 20 can limit and guide the movement of the distance between the arc frames 21. The bolts 23 inside the arc frame 21 can be used to press and position the arc frame 21 in use.

[0038] Please see Figure 1 , Figure 2 and Figure 3 As shown, a device for rapid grading and screening of broken rice;

[0039] The top of the box 1 has a feed shell 2 that runs through it. The back of the box 1 has a control panel 6. Multiple discharge shells 7 are arranged vertically on one side of the box 1. Multiple guide grooves are opened on the inner wall of the box 1. An installation frame 3 is movably arranged between two sets of guide grooves. A screen 4 is embedded inside the installation frame 3. The screen 4 and the movable shell 15 are arranged vertically and horizontally. The front of the box 1 has an opening and closing door 5.

[0040] Box 1 is the main component of the rapid grading and screening device for broken rice. The feed shell 2 allows broken rice to be slowly injected into the box 1. The inclined design of the bottom of the feed shell 2, together with the vibrating feeder (not shown in the figure), evenly disperses the broken rice and causes it to fall onto the upper surface of the first layer screen 4. The inclined design of the screen 4 guides and screens the broken rice. The mounting frame 3 can be pulled and replaced along the guide groove to adapt to different particle size grading requirements. The screen 4 and the moving shell 15 are staggered to ensure that the cleaning mechanism fully covers the screen surface and avoids cleaning dead corners. The broken rice screened by the screen 4 can be discharged from the box 1 through the discharge shell 7. The discharge shell 7 corresponds to different grades of broken rice (whole grains, large broken pieces, small broken pieces). The outlet slope is ≥45° to ensure smooth discharge. The control panel 6 can be used to adjust the operation of motor 10 and motor 24.

[0041] Please see Figure 7 and Figure 8 As shown, a device for rapid grading and screening of broken rice;

[0042] A limiting rod 16 is provided at the bottom end of the irregular rod 12. A spring 17 is provided on the outside of the limiting rod 16. A positioning rod 18 is movably sleeved on the outside of the limiting rod 16. The positioning rod 18 is designed in a "U" shape and can pass through the irregular rod 12 and be inserted into the movable shell 15.

[0043] By inserting the movable shell 15 into the assembly slot on one side of the irregular rod 12, the pulling force on the positioning rod 18 is released. The limiting rod 16 guides the "U"-shaped positioning rod 18, and the elastic squeezing force of the spring 17 on the outer side of the limiting rod 16 allows the positioning rod 18 to be inserted into the corresponding hole of the movable shell 15, thus realizing the assembly of the movable shell 15 and the irregular rod 12, which facilitates the disassembly and maintenance of the movable shell 15 in the future.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rapid grading and screening device for broken rice, characterized in that, include: Box (1) and cleaning mechanism; A cleaning mechanism includes a jet assembly and a tapping assembly, wherein the jet assembly is used to clean a clogged screening assembly by blowing air against the airflow, and the tapping assembly is used to assist the jet assembly in cleaning the screening assembly by tapping. The jet assembly includes a movable housing (15) and nozzles (19), with multiple sets of nozzles (19) internally disposed at the top of the movable housing (15); The striking assembly includes a rotating rod (20), an arc frame (21), and a hammering column (22). Multiple sets of the arc frames (21) are arranged at equal intervals on the outside of the rotating rod (20), and the hammering column (22) is set inside the arc frame (21). The hammering column (22) is made of rubber.

2. The rapid grading and screening device for broken rice as described in claim 1, characterized in that: The top of the box (1) is provided with a feed shell (2) that runs through it. The back of the box (1) is provided with a control panel (6). Multiple sets of discharge shells (7) are arranged in an array on one side of the box (1).

3. The rapid grading and screening device for broken rice as described in claim 1, characterized in that: The inner wall of the box (1) has multiple sets of guide grooves, and an installation frame (3) is movably arranged between two sets of guide grooves. A screen (4) is embedded inside the installation frame (3). The screen (4) and the movable shell (15) are arranged vertically and horizontally. An opening and closing door (5) is provided on the front of the box (1).

4. The rapid grading and screening device for broken rice as described in claim 1, characterized in that: An assembly shell (8) is provided on one side of the housing (1). A threaded rod (9) is rotatably provided inside the assembly shell (8). A guide rod (11) is provided inside the assembly shell (8) below the threaded rod (9). A No. 1 motor (10) is provided on the front of the assembly shell (8). The shaft of the output end of the No. 1 motor (10) is connected to one end of the threaded rod (9).

5. The rapid grading and screening device for broken rice as described in claim 4, characterized in that: The threaded rod (9) has a shaped rod (12) threaded through its outer side. The shaped rod (12) is movably sleeved on the outside of the guide rod (11). The shaped rod (12) is designed in the shape of an "E".

6. The rapid grading and screening device for broken rice as described in claim 5, characterized in that: An air pump (13) is provided on one side of the irregular rod (12), and an air supply pipe (14) is provided at the air outlet end of the air pump (13). The air supply pipe (14) is connected to the interior of the movable shell (15).

7. The rapid grading and screening device for broken rice as described in claim 5, characterized in that: The bottom end of the irregular rod (12) is provided with a limiting rod (16), and a spring (17) is provided on the outside of the limiting rod (16). A positioning rod (18) is movably sleeved on the outside of the limiting rod (16). The positioning rod (18) is designed in the shape of a "U". The positioning rod (18) can penetrate the irregular rod (12) and be inserted into the movable shell (15).

8. The rapid grading and screening device for broken rice as described in claim 1, characterized in that: The rotating rod (20) is rotatably mounted at the bottom of the movable shell (15). A second motor (24) is mounted at the bottom of the movable shell (15). The shaft of the output end of the second motor (24) is connected to one end of the rotating rod (20). Bolts (23) are threaded inside the multiple sets of arc-shaped frames (21).