Vibrating screen for separating grain impurities

Abstract

The utility model belongs to the technical field of grain separation, and particularly relates to a vibrating screen for grain impurity separation, which comprises a fixing component, a screen component and a rotation driving component, the rotation driving component is fixedly mounted on the fixing component, and the screen component is movably mounted on the upper side of the fixing component through a sliding support component. The rotation driving assembly is arranged on the lower side of the screen assembly, a rotating disc is rotationally arranged on the screen assembly, and the output end of the rotation driving assembly is eccentric and fixedly connected with the rotating disc. When the rotating driving assembly rotates, the rotating disc eccentrically rotates around the output end of the rotating driving assembly, finally the effect that the screen assembly shakes around the output end of the rotating driving assembly is achieved, shaking of workers is simulated to screen grains, the grain screening efficiency is improved, meanwhile, shaking can prevent the situation that the surface of a screen is locally stacked, and the screening efficiency is improved. And the condition of non-uniform screening is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of grain separation technology, specifically relating to a vibrating screen for separating grain impurities. Background Technology

[0002] In the process of grain inspection or grain cleaning and impurity removal, vibrating screens are needed to screen out impurities in the grain. There may be large sand particles or small dust particles in the grain. The vibrating screen removes the impurities in the grain to complete the separation of grain impurities. However, existing vibrating screens are often prone to local accumulation on the screen surface, resulting in uneven screening. Moreover, the screening efficiency of the screen will be greatly reduced after accumulation.

[0003] Chinese invention patent application number 202511541006.4 discloses a vibrating grain screening and cleaning center, relating to the technical field of separation. It includes a mobile frame with multiple shock absorbers fixedly connected to it. A vibrating frame inclined to one side is fixedly connected between each shock absorber. A first screen and a second screen, vertically distributed and inclined to one side, are fixedly connected within the vibrating frame. The first and second screens are used to screen large pieces of sand and gravel and small particles of dust, respectively. A partition plate is fixedly connected to the upper side of the vibrating frame, and a rotating plate is rotatably connected to the side of the partition plate near the entrance of the vibrating frame. While this invention places the screens within an inclined vibrating frame, which can prevent localized accumulation, the screening process relies on vertical vibration, whereas workers often use a shaking motion during actual screening. Therefore, the vertical vibration screening method is still not very efficient. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vibrating screen for separating grain impurities, which achieves higher screening efficiency by shaking the grain.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a vibrating screen for separating grain impurities, including a fixed component, a screen assembly, and a rotation drive component. The rotation drive component is fixedly installed on the fixed component, the screen assembly is movably installed on the upper side of the fixed component through a sliding support component, the rotation drive component is located on the lower side of the screen assembly, and a turntable is rotatably installed on the screen assembly. The output end of the rotation drive component is eccentrically connected to the turntable.

[0006] Preferably, it also includes a lifting component, which is fixedly installed on the fixed component. The screen component is rotatably installed on the sliding support component via a rotating shaft. The output end of the lifting component is connected to one side of the screen component. The lifting component drives the screen component to rotate around the rotating shaft. A discharge port is provided on the screen component on the opposite side of the output end of the lifting component.

[0007] Preferably, the screen assembly includes a first screen, a second screen, and a receiving plate arranged sequentially from top to bottom. An outer cover is fixedly arranged around the first screen, the second screen, and the receiving plate. One end of the second screen extends through the outer cover to form a discharge port. An inclined guide plate is provided at the end of the first screen and the receiving plate near the discharge port. The guide plate is inclined along its length, and a discharge port is opened at the lower end of both guide plates.

[0008] Preferably, the receiving plate is inclined, with one end of the receiving plate near the discharge port being lower than the other end.

[0009] Preferably, the screen assembly is fixedly installed on the upper side of the base plate, the rotating shaft is rotatably installed on the sliding support assembly, and a connecting block is fixed and protruding on the lower side of the base plate, the connecting block being rotatably connected to the rotating shaft.

[0010] Preferably, the lifting assembly includes a lifting motor, a lead screw, a lifting block, and a support rod. The lead screw is vertically arranged, with one end rotatably mounted on a fixed assembly and the other end fixedly connected to the output shaft of the lifting motor. The lifting block is threadedly connected to the lead screw, and the upper end of the support rod is hinged to the screen assembly, while the lower end of the support rod is hinged to the lifting block.

[0011] Preferably, the sliding support assembly includes a sliding group, a mounting plate, and a support plate. The mounting plate is slidably mounted on the fixed assembly via the sliding group, and the support plate is slidably mounted on the mounting plate via the sliding group. The sliding directions of the mounting plate and the support plate are perpendicular. The sliding group includes a slide rail and a sliding block slidably mounted on the slide rail.

[0012] Preferably, the turntable is rotatably mounted in the middle of the support plate. The rotation drive assembly includes a rotating shaft and a vibration motor. The vibration motor is fixedly mounted on the fixing assembly. One end of the rotating shaft is fixedly connected to the output shaft of the vibration motor, and the other end of the rotating shaft passes through the mounting plate and is eccentrically connected to the turntable.

[0013] Preferably, the fixing assembly includes a base plate, fixing columns, and a fixing plate. Multiple fixing columns are vertically arranged, and the lower ends of the fixing columns are fixedly installed on the base plate. The fixing plates are fixedly installed on the upper ends of each fixing column. The rotation drive assembly is fixedly installed on the lower side of the fixing plate. The output shaft of the rotation drive assembly passes through the fixing plate and the sliding support assembly and is connected to the screen assembly.

[0014] Preferably, a telescopic cover is fixedly provided between the fixed plate and the seat plate, and the telescopic cover covers the outside of the sliding support assembly and the rotation drive assembly.

[0015] Compared with existing technologies, the above technical solution has the following beneficial effects:

[0016] 1. The screen assembly of this utility model is connected to a rotary drive assembly. A turntable is provided on the screen assembly, and the output end of the rotary drive assembly is eccentrically connected to the turntable. Therefore, when the rotary drive assembly rotates, it will cause the turntable to rotate eccentrically around the output end of the rotary drive assembly, ultimately causing the screen assembly to sway around the output end of the rotary drive assembly. This simulates the shaking and screening of grains by workers, improving the efficiency of grain screening. At the same time, the shaking will also prevent local accumulation on the screen surface and avoid uneven screening.

[0017] 2. The screen assembly includes a first screen, a second screen, and a receiving plate. Larger sand, gravel, grains, and fine dust are screened out by the first screen and fall onto the second screen. Fine dust is screened out by the second screen and falls onto the receiving plate. One side of the screen assembly is lifted by a lifting component, causing the sand, gravel, and fine dust to fall onto a guide plate and then be discharged from the discharge port of the guide plate. Grains are poured out from the discharge port of the second screen.

[0018] 3. Since the fine dust is very light, the receiving plate is tilted. After the lifting component is lifted, the receiving plate tilts at a large degree to ensure that the fine dust can be completely dumped.

[0019] 4. Telescopic covers are provided on the outer covers of the sliding support assembly and the rotary drive assembly to prevent dust from entering the mechanical parts and extend the service life of the parts. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model after removing the telescopic cover and side panels.

[0022] Figure 3 This is a partial structural diagram of the screen area.

[0023] Figure 4 This is a partial structural schematic diagram of the present invention.

[0024] Figure 5 This is a schematic diagram of the lifting component.

[0025] Figure 6 This is a schematic diagram of the structure of the rotation drive assembly.

[0026] Figure 7 for Figure 6 Top view.

[0027] Figure 8 for Figure 7 Sectional view at point AA.

[0028] The components include: 1. Telescopic cover; 2. Side plate; 3. Seat plate; 4. Discharge port; 5. Base plate; 6. Fixing plate; 7. Fixing column; 8. Rotation drive assembly; 9. Lifting assembly; 10. First screen; 11. Second screen; 12. Receiving plate; 13. Guide plate; 14. Vertical plate; 15. Drop port; 16. Chip discharge port; 17. Connecting block; 18. Rotating shaft; 19. Sliding block; 20. Slide rail; 21. Mounting plate; 22. Lifting motor; 23. Pulley; 24. Synchronous belt; 25. Screw; 26. Lifting block; 27. Support rod; 28. Fixing block; 29. ​​Support plate; 30. Vibration motor; 31. Coupling; 32. Rotating shaft; 33. Connecting plate; 34. Connecting column; 35. Turntable. Detailed Implementation

[0029] Figures 1-8 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-8 The present invention will be further described below.

[0030] like Figures 1-2 As shown, this utility model discloses a vibrating screen for separating grain impurities, comprising a fixed component, a screen assembly, and a rotation drive component 8. The rotation drive component 8 is fixedly mounted on the fixed component and drives the screen assembly to shake. The screen assembly is movably mounted on the upper side of the fixed component via a sliding support component. The rotation drive component is located on the lower side of the screen assembly. The output end of the rotation drive component 8 passes through the sliding support component and connects to the screen assembly. A turntable 35 is rotatably mounted on the screen assembly. The output end of the rotation drive component 8 is eccentrically and fixedly connected to the turntable 35. The rotation drive component 8 drives the turntable 35 to rotate. Due to the eccentric setting, the turntable 35 rotates around the output end of the rotation drive component 8, thereby causing the screen assembly to rotate around the output end of the rotation drive component 8, thus achieving the shaking effect.

[0031] After screening, in order to facilitate the collection of grains and impurities, this utility model also provides a lifting component 9, which is also fixedly installed on the fixed component. The screen component is rotatably installed on the sliding support component via the rotating shaft 18. The output end of the lifting component 9 is connected to one side of the screen component. The lifting component 9 drives the screen component to rotate around the rotating shaft 18, so that one end of the screen component can be lifted and the other end of the screen component can swing downward, so that the grains and impurities in the screen component slide down to the lower end under the action of gravity, and the grains and impurities can be collected uniformly. A discharge port 4 is provided on the screen component opposite to the output end of the lifting component 9, and the grains are poured out from the discharge port 4.

[0032] like Figure 3As shown, the screen assembly includes a first screen 10, a second screen 11, and a receiving plate 12 arranged sequentially from top to bottom. The first screen 10 has larger gaps and filters grains and fine dust. Larger sand and gravel remain on the first screen 10, while grains and fine dust fall onto the second screen 11. The second screen 11 has smaller gaps and filters fine dust. Grains remain on the second screen 11, while fine dust falls onto the receiving plate 12 below. An outer cover is fixedly installed around the first screen 10, the second screen 11, and the receiving plate 12 to prevent grains from being shaken out and to prevent dust from flying. One end of the second screen 11 extends through the outer cover and forms a discharge port 4. Grains on the second screen 11 are poured out from the discharge port 4 and collected.

[0033] The sand and dust on the first screen 10 and the receiving plate 12 also need to be collected and processed. Inclined guide plates 13 are provided at the ends of the first screen 10 and the receiving plate 12 near the discharge port 4. The outer cover consists of a front upright plate 14, a rear plate, and side plates 2 on both sides. The guide plates 13 and the front upright plate 14 of the outer cover form a guide channel. The guide channel at one end of the first screen 10 is set lower than the first screen 10, and the guide channel at one end of the receiving plate 12 is set lower than the receiving plate 12. The lifting assembly 9 lifts the screen. On one side of the screen assembly, one end of the first screen 10, the second screen 11, and the receiving plate 12 is raised while the other end is lowered. Sand and dust slide onto the guide plate 13. At the same time, the guide plate 13 is inclined along its length, and the sand and dust slide along the guide plate 13 to the lower end. A discharge port 15 is opened at the lower end of the upper guide plate 13, and a chip discharge port 16 is opened at the lower end of the lower guide plate 13. Sand and dust fall from the discharge port 15 and are discharged from the screen assembly along with dust from the chip discharge port 16. Since fine dust is very light and easily adheres to the receiving plate 12, the receiving plate 12 is inclined, with the end of the receiving plate 12 near the discharge port 4 lower than the other end. After the lifting assembly 9 is raised, the receiving plate 12 is inclined at a large degree to ensure that the fine dust can be completely dumped.

[0034] like Figure 4 As shown, the fixing assembly includes a base plate 3, fixing columns 7, and fixing plate 6. Multiple fixing columns 7 are vertically arranged, and the lower ends of the fixing columns 7 are fixedly installed on the base plate 3. The fixing plate 6 is fixedly installed on the upper end of each fixing column 7. The sliding support assembly and the screen assembly are both located on the upper side of the fixing plate 6. There is an installation space on the lower side of the fixing plate 6. The rotation drive assembly 8 and the lifting assembly 9 are both fixedly installed on the lower side of the fixing plate 6. The output shaft of the rotation drive assembly 8 passes through the fixing plate 6 and the sliding support assembly and then connects to the screen assembly.

[0035] The sliding support assembly includes a sliding group, a mounting plate 21, and a support plate 29. The mounting plate 21 is slidably mounted on the fixed plate 6 via the sliding group, and the support plate 29 is slidably mounted on the mounting plate 21 via the sliding group. The sliding directions of the mounting plate 21 and the support plate 29 are perpendicular. The sliding group includes a slide rail 20 and a sliding block 19 slidably mounted on the slide rail 20. Specifically, two slide rails 20 are fixedly arranged on the upper side of the fixed plate 6, and two sliding blocks 19 are fixedly arranged on the lower side of the mounting plate 21, with the two sliding blocks 19 slidably mounted on the two slide rails 20 respectively. Two slide rails 20 are fixedly arranged on the upper side of the mounting plate 21, with the two slide rails 20 perpendicular to the slide rails 20 on the fixed plate 6. Two sliding blocks 19 are fixedly arranged on the lower side of the support plate 29, with the two sliding blocks 19 slidably mounted on the two slide rails 20 on the mounting plate 21 respectively.

[0036] The screen assembly is fixedly installed on the upper side of the base plate 5. A rotating shaft 18 is rotatably provided on both sides of the support plate 29. Two connecting blocks 17 are fixed on both sides of the base plate 5 and protrude downwards. The two connecting blocks 17 are rotatably connected to the two rotating shafts 18 respectively. The lifting component 9 pushes the base plate 5 upwards, so that the base plate 5 and the screen assembly rotate around the rotating shafts 18.

[0037] like Figure 5 As shown, the lifting assembly 9 includes a lifting motor 22, a lead screw 25, a lifting block 26, and a support rod 27. The lifting motor 22 is fixedly installed on the lower side of the fixed plate 6. The lead screw 25 is vertically arranged, with its upper end rotatably mounted on the fixed plate 6. The output shaft of the lifting motor 22 faces downward, and the lower end of the lead screw 25 is connected to the output shaft of the lifting motor 22 through a synchronization assembly. The lifting block 26 is threadedly connected to the lead screw 25. A fixed block 28 is fixedly installed on the lower side of the base plate 5. The upper end of the support rod 27 is hinged to the fixed block 28, and the lower end of the support rod 27 is hinged to the lifting block 26. When the lifting motor 22 operates, it drives the lead screw 25 to rotate, and the lifting block 26 moves up and down along the lead screw 25, thereby causing the support rod 27 to move up and down, pushing or pulling down the base plate 5. The synchronization assembly includes pulley 23 and timing belt 24. A pulley 23 is fixedly installed on the output shaft of the lifting motor 22, and a pulley 23 is fixedly installed at the lower end of the lead screw 25. The timing belt 24 simultaneously wraps around the outside of the two pulleys 23. When the output shaft of the lifting motor 22 rotates, the rotational power is transmitted to the lead screw 25 through the timing belt 24.

[0038] like Figures 6-8As shown, the turntable 35 is rotatably mounted in the middle of the support plate 29. The rotation drive assembly 8 includes a rotating shaft 32 and a vibrating motor 30. A connecting plate 33 is fixedly mounted on the vibrating motor 30. The connecting plate 33 is fixedly connected to the lower side of the fixed plate 6 via a connecting column 34. One end of the rotating shaft 32 is fixedly connected to the output shaft of the vibrating motor 30 via a coupling 31. The other end of the rotating shaft 32 passes through the fixed plate 6 and the mounting plate 21 and is eccentrically connected to the turntable 35. The rotation of the vibrating motor 30 drives the turntable 35 to rotate around the rotating shaft 32, thereby causing the support plate 29 to slide in two perpendicular directions, thus realizing the shaking of the screen assembly. A telescopic cover 1 is fixedly mounted between the fixed plate 6 and the base plate 3. The telescopic cover 1 covers the outside of the sliding support assembly, the rotation drive assembly 8, and the lifting assembly 9 to prevent dust from entering the mechanical components and extend the service life of the parts.

[0039] In use, unscreened grains are poured onto the first screen 10. The vibrating motor 30 drives the turntable 35 to rotate, causing the screen assembly to shake. Grains and fine dust are shaken and screened from the first screen 10 and fall onto the second screen 11. Fine dust falls onto the receiving plate 12 under the shaking and screening of the second screen 11. After a period of screening, when the lifting motor 22 rotates, the support rod 27 pushes one end of the screen assembly upward. The grains on the second screen 11 are poured out from the discharge port 4 under the action of gravity. Sand and dust slide down to the guide plate 13 under the action of gravity and are discharged from the screen assembly from the discharge port 15 and the chip discharge port 16 on one side of the guide plate 13. Then the lifting motor 22 reverses to make the screen assembly fall back to its original position, and then a new round of grain screening continues. This invention enables the screen assembly to oscillate around the output end of the rotation drive assembly 8, thereby simulating the shaking and screening of grains by a worker, improving the efficiency of grain screening. At the same time, the shaking also prevents local accumulation on the screen surface, avoiding uneven screening.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A vibrating screen for separating grain impurities, characterized in that: It includes a fixed component, a screen component and a rotation drive component (8). The rotation drive component (8) is fixedly installed on the fixed component. The screen component is movably installed on the upper side of the fixed component through a sliding support component. The rotation drive component (8) is located on the lower side of the screen component. A turntable (35) is rotatably installed on the screen component. The output end of the rotation drive component (8) is eccentrically connected to the turntable (35).

2. The vibrating screen for separating grain impurities according to claim 1, characterized in that: It also includes a lifting component (9), which is fixedly installed on a fixed component. The screen component is rotatably installed on a sliding support component via a rotating shaft (18). The output end of the lifting component (9) is connected to one side of the screen component. The lifting component (9) drives the screen component to rotate around the rotating shaft (18). A discharge port (4) is provided on the screen component opposite to the output end of the lifting component (9).

3. The vibrating screen for separating grain impurities according to claim 2, characterized in that: The screen assembly includes a first screen (10), a second screen (11), and a receiving plate (12) arranged sequentially from top to bottom. An outer cover is fixedly arranged around the first screen (10), the second screen (11), and the receiving plate (12). One end of the second screen (11) extends out of the outer cover and forms a discharge port (4). A guide plate (13) is inclinedly arranged at the end of the first screen (10) and the receiving plate (12) near the discharge port (4). The guide plate (13) is inclined along its length direction, and a discharge port is opened at the lower end of both guide plates (13).

4. A vibrating screen for separating grain impurities according to claim 3, characterized in that: The receiving plate (12) is inclined, with one end of the receiving plate (12) near the discharge port (4) being lower than the other end.

5. A vibrating screen for separating grain impurities according to claim 2 or 3, characterized in that: The screen assembly is fixedly installed on the upper side of the base plate (5), and the rotating shaft (18) is rotatably installed on the sliding support assembly. A connecting block (17) is fixed and protrudes from the lower side of the base plate (5), and the connecting block (17) is rotatably connected to the rotating shaft (18).

6. A vibrating screen for separating grain impurities according to claim 2, characterized in that: The lifting assembly (9) includes a lifting motor (22), a lead screw (25), a lifting block (26), and a support rod (27). The lead screw (25) is vertically arranged, with one end of the lead screw (25) rotatably mounted on a fixed assembly, and the other end of the lead screw (25) fixedly connected to the output shaft of the lifting motor (22). The lifting block (26) is threadedly connected to the lead screw (25). The upper end of the support rod (27) is hinged to the screen assembly, and the lower end of the support rod (27) is hinged to the lifting block (26).

7. A vibrating screen for separating grain impurities according to claim 1, characterized in that: The sliding support assembly includes a sliding group, a mounting plate (21), and a support plate (29). The mounting plate (21) is slidably mounted on the fixed assembly via the sliding group, and the support plate (29) is slidably mounted on the mounting plate (21) via the sliding group. The sliding directions of the mounting plate (21) and the support plate (29) are perpendicular to each other. The sliding group includes a slide rail (20) and a sliding block (19) slidably mounted on the slide rail (20).

8. A vibrating screen for separating grain impurities according to claim 7, characterized in that: The turntable (35) is rotatably mounted in the middle of the support plate (29). The rotation drive assembly (8) includes a rotating shaft (32) and a vibration motor (30). The vibration motor (30) is fixedly mounted on the fixed assembly. One end of the rotating shaft (32) is fixedly connected to the output shaft of the vibration motor (30), and the other end of the rotating shaft (32) passes through the mounting plate (21) and is eccentrically connected to the turntable (35).

9. A vibrating screen for separating grain impurities according to claim 1, characterized in that: The fixing assembly includes a base plate (3), fixing columns (7) and a fixing plate (6). Multiple fixing columns (7) are vertically arranged, and the lower end of the fixing column (7) is fixedly installed on the base plate (3). The fixing plate (6) is fixedly installed on the upper end of each fixing column (7). The rotation drive assembly (8) is fixedly installed on the lower side of the fixing plate (6). The output shaft of the rotation drive assembly (8) passes through the fixing plate (6) and the sliding support assembly and then connects to the screen assembly.

10. A vibrating screen for separating grain impurities according to claim 9, characterized in that: A telescopic cover (1) is fixedly provided between the fixed plate (6) and the seat plate (3), and the telescopic cover (1) covers the outside of the sliding support assembly and the rotation drive assembly (8).

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