A screening and separating device for rice grains

Abstract

The utility model discloses a kind of screening separation devices for rice grain, it is related to rice screening technical field, including base, the base is provided with two struts, the top of two The strut is hingedly installed with support ring, the top of the support ring is slidably connected with two brackets, the opposite end bottom of two The bracket is uniformly installed with mounting bracket, the opposite end of two The mounting bracket is commonly connected with second filter cartridge, the top of the second filter cartridge is detachably installed with first filter cartridge, the bottom of the second filter cartridge is rotatably sleeved with bottom tray, the bottom end between the support ring and base is commonly connected with electric push rod, the top of the electric push rod and support ring bottom hingedly connected.The utility model is provided with a series of structures, and the structure ensures that different specifications of rice and impurities can be efficiently and accurately sorted out, effectively improve the appearance and economic benefits of finished rice.

Description

Technical Field

[0001] This utility model relates to the field of rice grain screening technology, specifically a rice grain screening and separation device. Background Technology

[0002] As a staple food worldwide, the quality of rice processing directly affects its taste, storage safety, and economic value. After paddy rice undergoes cleaning, hulling, milling, and finishing processes, the resulting rice typically contains whole grains, broken grains (fragmented rice), and impurities. Effective grading is necessary to improve product quality and market competitiveness.

[0003] Currently, most rice grain screening and separation devices use a single filter screen, which can only separate broken rice from whole rice or rice grains from impurities. They cannot perform multi-stage screening or efficiently sort rice, and thus have certain limitations. Utility Model Content

[0004] The purpose of this invention is to provide a screening and separation device for rice grains to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rice grain screening and separation device, comprising a base, the base having two pillars, the tops of the two pillars being hinged to a support ring, the tops of the support ring being slidably connected to two brackets, the bottoms of the opposite ends of the two brackets being mounted with mounting frames, the opposite ends of the two mounting frames being connected to a second filter cylinder, the top of the second filter cylinder being detachably mounted with a first filter cylinder, the bottom of the second filter cylinder being rotatably fitted with a bottom tray, and the bottom end of the support ring being connected to the base with an electric push rod, the top of the electric push rod being hinged to the bottom of the support ring.

[0006] Preferably, a collection tray is placed at the top of the base below the bottom tray, a flip cover is hinged to one side of the top of the first filter cylinder, and a discharge port is provided on one side of the first filter cylinder. The collection tray collects the final product after screening. From top to bottom, the oversize material (largest particles) of the first filter cylinder, the oversize material (medium particles, such as whole rice) of the second filter cylinder, and the undersize material (smallest particles, such as broken rice) of the bottom tray will fall into different areas of the collection tray to achieve automatic packaging. The flip cover is used to seal the feed port to prevent dust from escaping during vibration. The discharge port is the outlet of the first-stage oversize material (large impurities) after screening. These unqualified products or large particles are discharged here.

[0007] Preferably, a motor is provided on one side of the support ring, and the output end of the motor extends to the top of the support ring. A cam is provided on the output end of the motor, and the outer surface of the cam contacts any one of the supports. Two spring telescopic rods are connected to both sides of the other support and the support ring. The motor and the cam are the core vibration sources of the device. The motor provides power, and the cam converts the rotational motion of the motor into reciprocating motion along a specific trajectory. When the protruding part of the cam presses against a support, it will push it to slide. When the cam pushes a support to slide, it will compress or stretch the spring telescopic rod on the other side. After the cam rotates past the protruding part, the elastic force of the spring telescopic rod will pull the support back to its original position. In this way, the two supports achieve continuous and stable horizontal reciprocating vibration with the cooperation of the cam and the spring telescopic rod.

[0008] Preferably, the bottoms of the first filter cylinder, the second filter cylinder, and the bottom tray are all filter screen structures. The pore size of the first filter cylinder is larger than that of the second filter cylinder. The filter screen at the bottom of the bottom tray has mesh holes with the same pore size as the bottom of the second filter cylinder. Furthermore, there is a circular hole smaller than the hole at the bottom of the second filter cylinder between the mesh holes at the bottom of the bottom tray and the bottom of the second filter cylinder. The first filter cylinder has the largest pore size and functions as a primary screen, trapping impurities larger than whole rice grains. The second filter cylinder has a medium pore size and functions as a core sorting device, allowing whole rice grains to pass through and separating whole rice grains from broken rice grains. The bottom tray has the same medium pore size and smaller circular holes, functioning as a fine screening device and for unloading control. The medium pore size mesh is used to cooperate with the bottom of the second filter cylinder to control the discharge of broken rice grains, while the smaller circular holes are used to remove finer dust particles, improving the purity of the finished rice.

[0009] Preferably, a spring pin is provided on one side of the bottom of the second filter cartridge, and two holes matching the spring pin are provided on one side of the bottom tray. The positioning and locking mechanism of the spring pin and the two holes ensures that the bottom tray can be stably positioned in a preset working position after rotation (the medium and minimum hole diameters coincide with the bottom mesh of the second filter cartridge, respectively). The spring pin 17 is engaged in the hole 18 under the action of the spring to prevent the tray from rotating on its own during vibration.

[0010] Preferably, the bottom of the first filter cylinder is provided with an external thread, and the inner wall of the second filter cylinder is provided with an internal thread, so as to realize the quick connection and separation between the first filter cylinder and the second filter cylinder. The threaded connection can ensure that the two cylinders will not loosen during the vibrating screening process, and also provide sufficient rigidity. This design makes it convenient for users to replace the first filter cylinder with different apertures according to different screening needs.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This rice grain screening and separation device achieves multi-stage fine separation of rice grains through the combination of a detachable first filter cylinder, a second filter cylinder, and a bottom tray. Larger impurities are retained by the first filter cylinder, whole rice is separated by the second filter cylinder, and broken rice and small particles are finally screened out through the bottom tray. This structure ensures that rice grains of different sizes and impurities can be efficiently and accurately separated, effectively improving the appearance and economic benefits of the finished rice. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model in disassembled state; Figure 3 This is a cross-sectional schematic diagram of the second filter screen structure of this utility model; In the diagram: 1. Base; 2. Bracket; 3. Collection tray; 4. Support ring; 5. Electric push rod; 6. Flip cover; 7. Cam; 8. Motor; 9. Discharge port; 10. First filter cartridge; 11. Second filter cartridge; 12. Spring telescopic rod; 13. Support column; 14. Mounting bracket; 15. Internal thread; 16. External thread; 17. Spring pin; 18. Hole; 19. Bottom tray. Detailed Implementation

[0013] 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.

[0014] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," 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 this utility model and 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 this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0015] like Figures 1 to 3As shown, the rice grain screening and separation device in this embodiment includes a base 1. The base 1 is provided with two pillars 13. The tops of the two pillars 13 are hinged together with a support ring 4. The two pillars 13 form the main support frame of the device, ensuring overall stability. The hinged connection between the top of the pillars and the support ring 4 is crucial, allowing the support ring 4 and the entire screening component on it to tilt at a certain angle around the hinge axis. This is the structural basis for realizing the tilt angle adjustment function of the screen cylinder. The top of the support ring 4 is slidably connected to two brackets 2. The two brackets 2 can slide relative to each other on the track of the support ring 4. This sliding is the core action that generates the vibration screening effect, aiming to convert the rotational motion generated by the motor 8 and the cam 7 into the horizontal reciprocating vibration of the screen cylinder. The bottom of the opposite ends of the two brackets 2 are each equipped with a mounting bracket 14. The mounting bracket 14 acts as a connector, rigidly connecting the slidable bracket 2 to the second filter cylinder 11. Therefore, when the bracket 2 slides, the power is directly transmitted to the second filter cylinder 11, causing it to vibrate. This two-point symmetrical support method ensures the stability of the screen cylinder vibration. The opposite ends of the two mounting brackets 14 are hinged together with a support ring 4. A second filter cartridge 11 is connected to the first filter cartridge 10, which is detachably mounted on top of the second filter cartridge 11. This detachable design enables modular functionality. The first filter cartridge 10 is used to screen out materials of the largest size, while the second filter cartridge 11 performs secondary screening. The detachable structure also facilitates the replacement of screen cartridges with different apertures to accommodate different materials, as well as cleaning and maintenance. A bottom tray 19 is rotatably fitted to the bottom of the second filter cartridge 11. The tray 19 can rotate independently relative to the second filter cartridge 11. After screening is complete, rotating the bottom tray 19 allows the bottom to... The two sets of mesh holes in the disc correspond to the second filter cylinder 11, preventing materials of the same fineness from falling through. The bottom end of the support ring 4 and the base 1 are connected together by an electric push rod 5. The top of the electric push rod 5 is hinged to the bottom of the support ring 4. The electric push rod 5 is the tilt angle adjustment actuator of the entire device. By extending and retracting the push rod, one end of the support ring 4 can be lifted or lowered, thereby infinitely changing the tilt angle of the entire screening system. Adjusting the tilt angle can control the flow speed and residence time of rice grains on the screen, which is a key means to optimize screening efficiency (for different varieties and moisture levels of rice).

[0016] Specifically, a collection tray 3 is placed on the top of the base 1 below the bottom tray 19. A flip cover 6 is hinged to one side of the top of the first filter cylinder 10. A discharge port 9 is provided on one side of the first filter cylinder 10. The collection tray 3 collects the final product after screening. From top to bottom, the oversize material (largest particles) of the first filter cylinder 10, the oversize material (medium particles, such as whole rice) of the second filter cylinder 11, and the undersize material (smallest particles, such as broken rice) of the bottom tray 19 will fall into different areas of the collection tray 3 to achieve automatic packaging. The flip cover 6 is used to seal the feed port to prevent dust from escaping during vibration. The discharge port 9 is the outlet of the first-stage oversize material (large impurities) after screening. These unqualified products or large particles are discharged here.

[0017] Furthermore, a motor 8 is provided on one side of the support ring 4, and the output end of the motor 8 extends to the top of the support ring 4. A cam 7 is provided on the output end of the motor 8. The outer surface of the cam 7 contacts any one of the brackets 2. Two spring telescopic rods 12 are connected to both sides of the other support and the support ring 4. The motor and the cam 7 are the core vibration sources of the device. The motor 8 provides power, and the cam 7 converts the rotational motion of the motor 8 into a reciprocating motion with a specific trajectory. When the protruding part of the cam 7 presses against a bracket 2, it will push it to slide. When the cam 7 pushes a bracket 2 to slide, it will compress or stretch the spring telescopic rod 12 on the other side. After the cam 7 rotates past the protruding part, the elastic force of the spring telescopic rod 12 will pull the bracket 2 back to its original position. In this way, the two brackets 2 achieve continuous and stable horizontal reciprocating vibration with the cooperation of the cam 7 and the spring telescopic rod 12.

[0018] Furthermore, the bottoms of the first filter cylinder 10, the second filter cylinder 11, and the bottom tray 19 are all filter screen structures. The aperture of the first filter cylinder 10 is larger than that of the second filter cylinder 11. The filter screen at the bottom of the bottom tray 19 has mesh holes with the same aperture as the bottom of the second filter cylinder 11. A round hole smaller than the hole 18 at the bottom of the second filter cylinder 11 is provided between the bottom of the bottom tray 19 and the bottom of the second filter cylinder 11 with the same mesh holes. The first filter cylinder 10 has the largest aperture and its function is primary screening, intercepting impurities larger than whole rice. The second filter cylinder 11 has a medium aperture and its function is core sorting, allowing whole rice to pass through and separating whole rice from broken rice. The bottom tray 19 has the same medium aperture and smaller round holes, and its function is fine screening and unloading control. The medium aperture mesh is used to cooperate with the bottom of the second filter cylinder 11 to control the discharge of broken rice, while the smaller round holes are used to screen out finer dust and improve the purity of the finished rice.

[0019] Furthermore, a spring pin 17 is provided on one side of the bottom of the second filter cylinder 11, and two holes 18 that match the spring pin 17 are opened on one side of the bottom tray 19. The positioning and locking mechanism of the spring pin 17 and the two holes 18 is designed to ensure that the bottom tray 19 can be stably positioned in the preset working position after rotation (the medium and minimum hole diameters coincide with the bottom mesh of the second filter cylinder 11, respectively). The spring pin 17 is engaged in the hole 18 under the action of the spring to prevent the tray from rotating on its own during vibration.

[0020] Furthermore, the bottom of the first filter cylinder 10 is provided with an external thread 16, and the inner wall of the second filter cylinder 11 is provided with an internal thread 15, so as to realize the quick connection and separation between the first filter cylinder 10 and the second filter cylinder 11. The threaded connection can ensure that the two cylinders will not loosen during the vibrating screening process, and also provide sufficient rigidity. This design makes it easy for users to replace the first filter cylinder 10 with different apertures according to different screening needs.

[0021] The usage method of this embodiment is as follows: When using the rice grain screening and separation device, the tilt angle of the support ring 4 is adjusted by extending and retracting the electric push rod 5, thereby setting the initial tilt angle of the entire screen cylinder. The tilt angle directly affects the flow speed and residence time of the rice grains on the screen, which is the key to optimizing the sorting effect. It can usually be initially adjusted according to the rice variety and humidity. Open the flip cover 6 on the top of the first filter cylinder 10, and pour the prepared rice grains evenly and continuously into the first filter cylinder 10. Control the feed flow rate to avoid being too thick or too thin, so as to ensure the screening effect. During operation, closely observe the screening situation of the material. The tilt angle of the screen cylinder (via electric push rod 5) or the vibration parameters (which can be adjusted by adjusting the speed of motor 8 in some devices) can be finely adjusted according to the distribution and grading effect of the material on the screen surface to achieve the best process effect. First-stage screening (preliminary cleaning): large impurities (such as rice husks and large particle impurities) larger than the aperture of the first filter cylinder 10 are intercepted and can be discharged through the side discharge port 9. Second-stage screening (separation of whole rice and broken rice): rice grains that have passed through the first filter cylinder 10 fall into the second filter cylinder 11. Whole rice is retained here, while broken rice and smaller particles fall through the sieve holes of the second filter cylinder 11. The third stage of screening (fine grading): the mixture (mainly broken rice) falling into the bottom tray 19 is screened out by the vibration of the tray, and the dust smaller than the small round holes on the tray is removed. The broken rice is discharged according to the alignment of the mesh of the bottom tray 19 with the bottom mesh of the second filter cylinder 11. By rotating the bottom tray 19, the spring pin 17 can be engaged in different holes 18, which can change the overlap state of the mesh of the tray and the bottom mesh of the second filter cylinder 11, thereby realizing fine grading of broken rice or controlling the discharge. Finally, whole rice, broken rice of different sizes and dust will enter the different compartments of the collection tray 3 to complete the automatic packaging.

[0022] 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 grain screening and separation device, comprising a base (1), characterized in that: The base (1) is provided with two pillars (13). The top of the two pillars (13) is hinged to a support ring (4). The top of the support ring (4) is slidably connected to two brackets (2). The bottom of the opposite ends of the two brackets (2) is equipped with mounting brackets (14). The opposite ends of the two mounting brackets (14) are connected to a second filter cartridge (11). The top of the second filter cartridge (11) is detachably equipped with a first filter cartridge (10). The bottom of the second filter cartridge (11) is rotatably sleeved with a bottom tray (19). The bottom end of the support ring (4) and the base (1) are connected to an electric push rod (5). The top of the electric push rod (5) is hinged to the bottom of the support ring (4).

2. The rice grain screening and separation device according to claim 1, characterized in that: A collection tray (3) is placed on the top of the base (1) below the bottom tray (19), a flip cover (6) is hinged to one side of the top of the first filter cylinder (10), and a discharge port (9) is provided on one side of the first filter cylinder (10).

3. The rice grain screening and separation device according to claim 1, characterized in that: A motor (8) is provided on one side of the support ring (4). The output end of the motor (8) extends to the top of the support ring (4). A cam (7) is provided on the output end of the motor (8). The outer surface of the cam (7) contacts any one of the brackets (2). Two spring telescopic rods (12) are connected between the two sides of the other support and the support ring (4).

4. The rice grain screening and separation device according to claim 1, characterized in that: The bottom of the first filter cylinder (10), the second filter cylinder (11) and the bottom tray (19) are all filter screen structures. The aperture of the first filter cylinder (10) is larger than that of the second filter cylinder (11). The filter screen at the bottom of the bottom tray (19) has mesh holes with the same aperture as the bottom of the second filter cylinder (11). A round hole smaller than the mesh hole at the bottom of the second filter cylinder (11) is provided between the bottom of the bottom tray (19) and the same mesh hole at the bottom of the second filter cylinder (11).

5. The rice grain screening and separation device according to claim 1, characterized in that: A spring pin (17) is provided on one side of the bottom of the second filter cartridge (11), and two holes (18) matching the spring pin (17) are opened on one side of the bottom tray (19).

6. The rice grain screening and separation device according to claim 1, characterized in that: The bottom of the first filter cylinder (10) is provided with an external thread (16), and the inner wall of the second filter cylinder (11) is provided with an internal thread (15).

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