A multi-stage stepped rice screening device

Abstract

This utility model discloses a multi-stage stepped rice screening device, belonging to the field of screening devices. It includes a base frame, on which a first fixed rod and a second fixed rod are fixed. A first screening frame is rotatably connected to the first fixed rod, and a first screen is installed on the first screening frame. Vibrating plates are installed on the first and second screening frames, working in conjunction with a mounting assembly, a vibration assembly, and a vibrator. During the screening process, this creates a tumbling vibration, which not only disperses the material for uniform screening but also applies force to the material, preventing clogging of the screen mesh and ensuring normal screen operation and screening efficiency. The mounting assembly adopts a spliced ​​structure, allowing for quick disassembly to replace the support springs in the vibration assembly. A first connecting sleeve and a second connecting sleeve allow adjustment of the support plate's position, thereby changing the tilt angle of the corresponding screening frame.

Description

Technical Field

[0001] This utility model relates to the field of screening devices, and in particular to a multi-stage stepped rice screening device. Background Technology

[0002] Rice screening devices are key equipment in rice processing and storage. Their function is to separate impurities, defective grains, and broken grains from rice using physical methods, thereby improving rice quality. Rice screening devices are generally multi-stage stepped structures, using stepped multi-layered screens to separate and screen different particle sizes and impurities, enabling the packaging of rice at different particle sizes.

[0003] Multi-stage stepped screening devices involve feeding material onto the top screen, utilizing the multiple stepped screens for multi-stage screening, resulting in high screening accuracy. However, in most existing multi-stage stepped screening devices, each screen is fixed, relying solely on gravity for screening. This can easily lead to screen clogging, affecting screening efficiency. While some devices include vibrators, the entire device vibrates synchronously, with all screens vibrating at the same amplitude, making individual adjustment impossible and limiting operational flexibility. Utility Model Content

[0004] The main objective of this invention is to provide a multi-stage stepped rice screening device, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A multi-stage stepped rice screening device includes a base frame, on which a first fixed rod and a second fixed rod are fixed. A first screening frame is rotatably connected to the first fixed rod, and a first screen is installed on the first screening frame. A second screening frame is provided on the second fixed rod, and a second screen is fixed on the second screening frame. A third screening frame is installed on the inner side of the base frame, and a third screen is fixed on the third screening frame. A crossbar is provided on the base frame and the first fixed rod, and an elastic support structure is provided on the base frame through the crossbar. A vibrator is provided on the first screening frame and the second screening frame. The upper end of the elastic support structure is connected to the first screening frame and the second screening frame.

[0007] Preferably, the elastic support structure includes a vibrating plate, a waist-shaped hole, a support column, an installation assembly, and a vibration assembly. The two sets of vibrating plates are respectively fixed to the side walls of the first screening frame and the second screening frame, and the two vibrating plates of each set are symmetrically arranged on the first screening frame and the second screening frame. The waist-shaped hole is opened on the vibrating plate. The support column is fixed on the base frame, and the upper end of the support column passes through the crossbar. The support column is provided with a connecting hole. The installation assembly is connected to the support column by threads and spliced ​​upwards. The vibration assembly is set on the installation assembly, and the upper end of the vibration assembly contacts the vibrating plate.

[0008] Preferably, the mounting assembly includes a mounting rod, a threaded connector, and a threaded hole. The threaded connector is fixed to the lower end of the mounting rod, and the threaded hole is located at the upper end of the mounting rod and is compatible with the threaded connector.

[0009] Preferably, the vibration assembly includes a first connecting sleeve, a second connecting sleeve, a support plate, mounting screws, and a support spring. The first and second connecting sleeves are fitted onto the mounting rod in the mounting assembly. The first connecting sleeve has a screw hole, and the second connecting sleeve has a countersunk hole. The mounting screw is disposed in the countersunk hole, and the end of the mounting screw is connected to the screw hole. The support plate is fixed to the upper ends of the first and second connecting sleeves. The support spring is fitted outside the mounting rod, and the lower end of the support spring contacts the support plate.

[0010] Preferably, the vibrators are symmetrically distributed on the first screening frame and the second screening frame, and the vibrators are fixed on the first screening frame and the second screening frame by screws.

[0011] Preferably, the base frame is equipped with a fixed frame and a connecting frame, and the fixed frame and the connecting frame are provided with a first hopper, a second hopper and a third hopper, which are located at the ends of the first screening frame, the second screening frame and the third screening frame, respectively.

[0012] Preferably, the lower end of the base frame is fixed with a support leg, and the support leg is provided with a reinforcing rod.

[0013] Compared with the prior art, this utility model has the following beneficial effects: In this multi-stage stepped rice screening device, the ends of the first screening frame and the second screening frame are rotatably connected. Vibrating plates are set on the first screening frame and the second screening frame, and are used in conjunction with the installation components, vibration components and exciter. During the screening process, a tumbling vibration can be formed, which can not only disperse the material to form a uniform screening effect, but also apply force to the material during the screening process to avoid the screen mesh from clogging, thus ensuring the normal use of the screen and guaranteeing the screening effect. The installation components adopt a splicing structure, which can be quickly disassembled to replace the support spring in the vibration component. The use of the first connecting sleeve and the second connecting sleeve can adjust the position of the support plate, thereby changing the tilt angle of the corresponding screening frame, improving the flexibility and adaptability of use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the hopper of this utility model;

[0016] Figure 3 This is a schematic diagram of the elastic support structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the mounting component of this utility model.

[0018] In the diagram: 1. Base frame; 2. First fixed rod; 3. Second fixed rod; 4. First screening frame; 5. Second screening frame; 6. Third screening frame; 7. Crossbar; 8. Elastic support structure; 801. Vibrating plate; 802. Waist-shaped hole; 803. Support column; 804. Mounting assembly; 8041. Mounting rod; 8042. Threaded joint; 8043. Threaded hole; 805. Vibration assembly; 8051. First connecting sleeve; 8052. Second connecting sleeve; 8053. Support plate; 8054. Mounting screw; 8055. Support spring; 9. Vibrator; 10. First screen; 11. Second screen; 12. Third screen; 13. Fixed frame; 14. Connecting frame; 15. First hopper; 16. Second hopper; 17. Third hopper; 18. Support leg. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] like Figures 1-4As shown, a multi-stage stepped rice screening device includes a base frame 1, on which a first fixed rod 2 and a second fixed rod 3 are fixed. A first screening frame 4 is rotatably connected to the first fixed rod 2, and a first screen 10 is installed on the first screening frame 4. A second screening frame 5 is provided on the second fixed rod 3, and a second screen 11 is fixed on the second screening frame 5. A third screening frame 6 is installed on the inner side of the base frame 1, and a third screen 12 is fixed on the third screening frame 6. A crossbar 7 is provided on the base frame 1 and the first fixed rod 2, and an elastic support structure 8 is provided on the base frame 1 that passes through the crossbar 7. A vibrator 9 is provided on the first screening frame 4 and the second screening frame 5. The upper end of the elastic support structure 8 is connected to the first screening frame 4 and the second screening frame 5.

[0021] The vibrators 9 are symmetrically distributed on the first screening frame 4 and the second screening frame 5, and are fixed to the first screening frame 4 and the second screening frame 5 by screws. A fixing frame 13 and a connecting frame 14 are installed on the base frame 1, and a first discharge hopper 15, a second discharge hopper 16, and a third discharge hopper 17 are provided on the fixing frame 13 and the connecting frame 14. The first discharge hopper 15, the second discharge hopper 16, and the third discharge hopper 17 are located at the ends of the first screening frame 4, the second screening frame 5, and the third screening frame 6, respectively. A support leg 18 is fixed to the lower end of the base frame 1, and a reinforcing rod is provided on the support leg 18.

[0022] When using a multi-stage stepped screening device to screen and process rice, the base frame 1 is placed by the support legs 18. After the vibrator 9 is started, the first screening frame 4 rotates and vibrates on the first fixed rod 2 under the vibration of the vibrator 9, the second screening frame 5 rotates and vibrates on the second fixed rod 3, and the third screening frame 6 remains relatively stationary. Rice grains are fed onto the first screening frame 4. The first screen 10 performs initial separation of the rice grains. Large particles of impurities roll along the first screen 10 and eventually fall into the first discharge hopper 15 at the upper position of the fixed frame 13 and the connecting frame 14 for discharge. The rice grains that pass through the first screen 10 fall onto the second screen 11. The second screen 11 performs a second screening of the rice grains to further remove impurities. The impurities fall into the second discharge hopper 16 for discharge. The remaining rice grains fall onto the third screen 12. The third screen 12 performs a third screening of the rice grains, separating large and small rice grains. Large rice grains move along the third screen 12 into the third discharge hopper 17 for final discharge, while small rice grains are discharged from the discharge port at the lower end of the third screening frame 6.

[0023] During the screening process, the first screening frame 4 and the second screening frame 5 rotate and vibrate under the action of the vibrator 9. In conjunction with the elastic support structure 8, they can rotate and vibrate at the same time as screening, which can make the screening uniform and avoid clogging.

[0024] According to the above implementation scheme, the elastic support structure 8 includes a vibrating plate 801, a waist-shaped hole 802, a support column 803, an installation component 804, and a vibration component 805. Two sets of vibrating plates 801 are respectively fixed to the side walls of the first screening frame 4 and the second screening frame 5, and the two vibrating plates 801 in each set are symmetrically arranged on the first screening frame 4 and the second screening frame 5, respectively. The waist-shaped hole 802 is opened on the vibrating plate 801. The support column 803 is fixed on the base frame 1, and the upper end of the support column 803 passes through the crossbar 7. The support column 803 is provided with a connecting hole. The installation component 804 is connected to the support column 803 by threads and spliced ​​upwards in sequence. The vibration component 805 is set on the installation component 804, and the upper end of the vibration component 805 contacts the vibrating plate 801.

[0025] When using the screening device, as the vibrator 9 operates, the first screening frame 4 and the second screening frame 5 flip over. The vibrating plate 801 moves with the first screening frame 4 and the second screening frame 5, thereby impacting the vibrating component 805 at the mounting component 804 below, thus forming a flipping vibration. During this process, the mounting component 804 moves relative to the waist-shaped hole 802 on the vibrating plate 801, without affecting the normal flipping of the first screening frame 4 and the second screening frame 5.

[0026] Mounting assembly 804 includes mounting rod 8041, threaded connector 8042, and threaded hole 8043. Threaded connector 8042 is fixed to the lower end of mounting rod 8041, and threaded hole 8043 is opened at the upper end of mounting rod 8041 and is adapted to threaded connector 8042. The vibration assembly 805 includes a first connecting sleeve 8051, a second connecting sleeve 8052, a support plate 8053, a mounting screw 8054, and a support spring 8055. The first connecting sleeve 8051 and the second connecting sleeve 8052 are sleeved on the mounting rod 8041 in the mounting assembly 804. The first connecting sleeve 8051 has a screw hole, and the second connecting sleeve 8052 has a countersunk hole. The mounting screw 8054 is disposed in the countersunk hole, and the end of the mounting screw 8054 is connected to the screw hole. The support plate 8053 is fixed to the upper end of the first connecting sleeve 8051 and the second connecting sleeve 8052. The support spring 8055 is sleeved outside the mounting rod 8041, and the lower end of the support spring 8055 contacts the support plate 8053.

[0027] During operation, the first screening frame 4 and the second screening frame 5 rotate, causing the vibrating plate 801 to move. The vibrating plate 801 strikes the corresponding support spring 8055, generating vibration, which in turn causes the first screening frame 4 and the second screening frame 5 to vibrate, ensuring the screening effect. When needed, the mounting screw 8054 in the countersunk hole can be loosened to adjust the position of the first connecting sleeve 8051 and the second connecting sleeve 8052. This allows the support plate 8053 to raise and lower the support spring 8055, thereby changing the tilt angle of the corresponding screening frame. The structure is simple and the adjustment is convenient and quick. If the support spring 8055 needs to be replaced, first remove the two connecting sleeves, then rotate the mounting rod 8041. The threaded connector 8042 at the lower end of the uppermost mounting rod 8041 will unscrew from the threaded hole 8043 on the lower mounting rod 8041. Then, follow the above process to disassemble the mounting rods 8041 in sequence, and then replace the support spring 8055. After replacement, it can be reinstalled for use.

[0028] It should be noted that the ends of the first screening frame 4 and the second screening frame 5 are rotatably connected. Vibrating plates 801 are installed on the first screening frame 4 and the second screening frame 5, and are used in conjunction with the mounting assembly 804, the vibration assembly 805 and the vibrator 9. During the screening process, they can generate tumbling vibration, which can not only disperse the material to form a uniform screening effect, but also apply force to the material during the screening process to avoid clogging of the screen mesh, thus ensuring the normal use of the screen and guaranteeing the screening effect. The mounting assembly 804 adopts a splicing structure, which can be quickly disassembled to replace the support spring 8055 in the vibration assembly 805. The first connecting sleeve 8051 and the second connecting sleeve 8052 are used to adjust the position of the support plate 8053, thereby changing the tilt angle of the corresponding screening frame and improving the flexibility and adaptability of use.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage stepped rice screening device, comprising a base frame (1), wherein a first fixing rod (2) and a second fixing rod (3) are fixed on the base frame (1), characterized in that: The first fixed rod (2) is rotatably connected to the first screening frame (4), and the first screening frame (4) is equipped with the first screen (10). The second fixed rod (3) is provided with the second screening frame (5), and the second screen (5) is fixed with the second screen (11). The inner side of the base frame (1) is provided with the third screening frame (6), and the third screen (6) is fixed with the third screen (12). The base frame (1) and the first fixed rod (2) are provided with the crossbar (7), and the base frame (1) is provided with the elastic support structure (8) that passes through the crossbar (7). The first screening frame (4) and the second screening frame (5) are provided with the vibrator (9). The upper end of the elastic support structure (8) is connected to the first screening frame (4) and the second screening frame (5).

2. The multi-stage stepped rice screening device according to claim 1, characterized in that: The elastic support structure (8) includes a vibrating plate (801), a waist-shaped hole (802), a support column (803), an installation component (804), and a vibration component (805). The two sets of vibrating plates (801) are respectively fixed to the side walls of the first screening frame (4) and the second screening frame (5), and the two vibrating plates (801) of each set are symmetrically arranged on the first screening frame (4) and the second screening frame (5). The waist-shaped hole (802) is opened on the vibrating plate (801). The support column (803) is fixed on the base frame (1), and the upper end of the support column (803) passes through the crossbar (7). The support column (803) is provided with a connecting hole. The installation component (804) is connected to the support column (803) by threads and spliced ​​upwards in sequence. The vibration component (805) is set on the installation component (804), and the upper end of the vibration component (805) contacts the vibrating plate (801).

3. The multi-stage stepped rice screening device according to claim 2, characterized in that: The mounting assembly (804) includes a mounting rod (8041), a threaded connector (8042), and a threaded hole (8043). The threaded connector (8042) is fixed to the lower end of the mounting rod (8041), and the threaded hole (8043) is opened at the upper end of the mounting rod (8041), and the threaded hole (8043) is adapted to the threaded connector (8042).

4. The multi-stage stepped rice screening device according to claim 3, characterized in that: The vibration assembly (805) includes a first connecting sleeve (8051), a second connecting sleeve (8052), a support plate (8053), a mounting screw (8054), and a support spring (8055). The first connecting sleeve (8051) and the second connecting sleeve (8052) are sleeved on the mounting rod (8041) in the mounting assembly (804). The first connecting sleeve (8051) has a screw hole, and the second connecting sleeve (8052) has a countersunk hole. The mounting screw (8054) is disposed in the countersunk hole, and the end of the mounting screw (8054) is connected to the screw hole. The support plate (8053) is fixed to the upper end of the first connecting sleeve (8051) and the second connecting sleeve (8052). The support spring (8055) is sleeved outside the mounting rod (8041), and the lower end of the support spring (8055) contacts the support plate (8053).

5. The multi-stage stepped rice screening device according to claim 4, characterized in that: The vibrators (9) are symmetrically distributed on the first screening frame (4) and the second screening frame (5), and the vibrators (9) are fixed on the first screening frame (4) and the second screening frame (5) by screws.

6. The multi-stage stepped rice screening device according to claim 5, characterized in that: The base frame (1) is equipped with a fixed frame (13) and a connecting frame (14), and the fixed frame (13) and the connecting frame (14) are provided with a first feeding hopper (15), a second feeding hopper (16) and a third feeding hopper (17). The first feeding hopper (15), the second feeding hopper (16) and the third feeding hopper (17) are located at the end positions of the first screening frame (4), the second screening frame (5) and the third screening frame (6), respectively.

7. The multi-stage stepped rice screening device according to claim 6, characterized in that: The lower end of the base frame (1) is fixed with a support leg (18), and a reinforcing rod is provided on the support leg (18).

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