A screen aperture switching device for coal gangue screening
By designing a screen aperture switching device, the problem of needing to stop the machine to disassemble the screen aperture for adjustment in the existing technology has been solved, thereby improving screening efficiency and accuracy, solving the problem of dust blockage, and improving production continuity and screening effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PINGDINGSHAN RUIPING COAL & ELECTRICITY CO LTD PISHAN COAL MINE
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-02
AI Technical Summary
Existing coal gangue screening devices require machine shutdown and screen disassembly for screen hole adjustment, which is cumbersome and affects production efficiency. Furthermore, dust during screening can easily clog the spray pipes, affecting the dust removal effect.
A screen aperture switching device for coal gangue screening was designed. Through the cooperation of a support frame, screening components and a sweeping mechanism, the screen aperture size can be quickly adjusted and cleaned. The screen plate is moved by a magnetic block and a threaded rod, and the surface of the screen plate is swept by a sweeping rod to enhance the contact area and cleaning effect.
It enables rapid adjustment of screen aperture size, improves production continuity and screening efficiency, enhances screening accuracy and effect, reduces downtime, keeps screen apertures unobstructed, and improves coal and gangue separation efficiency.
Smart Images
Figure CN224308945U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal gangue screening technology, and more specifically, to a screen aperture switching device for coal gangue screening. Background Technology
[0002] Coal gangue screening is an important step in the coal washing and processing process. It aims to classify coal gangue (solid waste from coal mining and washing) according to its particle size, density and other characteristics, so as to facilitate subsequent resource utilization or disposal.
[0003] During the screening of coal gangue, smoke and dust will drift everywhere, and some of the smoke and dust will reach the vicinity of the spray pipe. After mixing with water mist, this part of the smoke and dust will adhere to the surface of the spray pipe, causing blockage of the spray channels and affecting the removal of smoke and dust.
[0004] A search revealed that Chinese patent CN222830125U discloses a coal gangue screening device. The position-changing motor moves the cleaning component to the cleaning nozzle position, i.e., the nozzle cleaning state. In this state, through the cooperation of the various components within the cleaning component, the dust and water mixture adhering to the nozzle surface can be removed. The cleaning component in the nozzle retracted state does not obstruct the normal operation of the spray dust suppression component.
[0005] In actual use, the screen aperture of the above-mentioned coal gangue screening device is fixed when screening coal gangue. When it is necessary to adjust the screening particle size, it is usually necessary to stop the machine and disassemble the screen, which is cumbersome and time-consuming, causing production interruption and affecting the overall production efficiency. Utility Model Content
[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a screen aperture switching device for coal gangue screening to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A screen aperture switching device for coal gangue screening includes a support frame, a screening machine is installed at the top of the support frame, a feed pipe is connected to the top of the screening machine, a screening component and a sweeping mechanism are installed inside the screening machine, and the sweeping mechanism is installed above the screening component.
[0009] The screening assembly includes two guide columns, which are fixedly connected to one side of a support frame. A connecting plate is slidably connected to the outer side of the guide columns. The connecting plate is bolted to the front side of the support frame. A handle is fixedly connected to the front side of the connecting plate. A first screening plate is fixedly connected to one side of the connecting plate. The upper surface of the first screening plate has multiple first screening holes and second screening holes. A second screening plate is slidably connected to the outer side of the first screening plate. The second screening plate is bolted to the support frame. The upper surface of the second screening plate has multiple third screening holes. Two first magnets are fixedly connected to one side of the connecting plate. Two second magnets are fixedly connected to the other side of the connecting plate. Two third magnets are fixedly connected to one side of the support frame. Two fixing frames are fixedly connected to one side of the support frame. A fourth magnet is fixedly connected to the inner side of the fixing frame. A connecting frame is fixedly connected to the outer side of the fixing frame. A threaded rod is rotatably connected inside the connecting frame. A limit block is threadedly connected to the outer side of the threaded rod. The limit block is slidably connected to the inner side of the fixing frame.
[0010] By adopting the above technical solution, the size of the screen aperture can be quickly adjusted, thereby enabling more efficient separation of coal and gangue of different particle sizes.
[0011] As a further description of the above technical solution: the sweeping mechanism includes a stepper motor, which is fixedly connected to one side of the support frame. A lead screw is fixedly connected to the output end of the stepper motor. A support plate is rotatably connected to the outer side of the lead screw. The support plate is fixedly connected to the inner side of the support frame. A moving block is threadedly connected to the outer side of the lead screw. A servo motor is installed inside the moving block. A rotating rod is fixedly connected to the output end of the servo motor. Multiple sweeping rods are fixedly connected to the outer side of the rotating rod. A connecting block is rotatably connected to one end of the rotating rod. A guide rod is slidably connected inside the connecting block. The guide rod is fixedly connected to the inner side of the support frame.
[0012] By adopting the above technical solution, the coal and gangue on the surface of the second screening plate can be swept, increasing the contact area between the coal and gangue and the second screening plate, thereby improving the screening effect.
[0013] The technical effects and advantages of this utility model are as follows:
[0014] 1. By setting up a screening component, compared with the existing technology, the first screening plate can be moved inside the second screening plate according to the actual situation, so that the first screening hole and the second screening hole can coincide with the third screening hole, so as to adjust the size of the screened particles. This allows for more efficient separation of coal and gangue of different particle sizes. The screen holes can be quickly adjusted without disassembling the second screening plate, greatly reducing downtime and improving production continuity.
[0015] 2. By setting up a sweeping mechanism, compared with the existing technology, the rotating rod can drive multiple sweeping rods to sweep the upper surface of the second screening plate back and forth. This can continuously sweep across the surface of the second screening plate, promptly clean up the adhering material, keep the screen holes unobstructed, and evenly disperse the coal and gangue on the surface of the second screening plate. This increases the contact area between the coal and gangue and the second screening plate, helping the coal and gangue to contact the second screening plate more fully, thereby improving the screening accuracy and effect. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0017] Figure 2 This is a schematic diagram of the right side of the screening machine of this utility model.
[0018] Figure 3 This is a cross-sectional view of the screening machine of this utility model.
[0019] Figure 4 This is a schematic diagram of the second screening plate structure of this utility model.
[0020] Figure 5 This is a partial structural diagram of the rotating rod connection of this utility model.
[0021] Figure 6 For the present utility model Figure 3 Enlarged view of the structure of part A in the middle.
[0022] The attached figures are labeled as follows: 1. Support frame; 2. Screening machine; 3. Feed pipe; 4. Guide column; 5. Connecting plate; 6. Handle; 7. First screening plate; 8. First screening hole; 9. Second screening hole; 10. Second screening plate; 11. Third screening hole; 12. First magnet block; 13. Second magnet block; 14. Third magnet block; 15. Fixing frame; 16. Fourth magnet block; 17. Connecting frame; 18. Threaded rod; 19. Limiting block; 20. Stepper motor; 21. Lead screw; 22. Support plate; 23. Moving block; 24. Servo motor; 25. Rotating rod; 26. Sweeping rod; 27. Connecting block; 28. Guide rod. Detailed Implementation
[0023] 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.
[0024] The embodiments disclosed in this application are as follows: Figure 1-6The screen aperture switching device for coal gangue screening shown includes a support frame 1, a screening machine 2 is installed at the top of the support frame 1, a feed pipe 3 is connected to the top of the screening machine 2, a screening component and a sweeping mechanism are installed inside the screening machine 2, and the sweeping mechanism is installed above the screening component.
[0025] The screening assembly includes two guide columns 4, which are fixedly connected to one side of the support frame 1. A connecting plate 5 is slidably connected to the outer side of the guide columns 4. The connecting plate 5 is bolted to the front side of the support frame 1. A handle 6 is fixedly connected to the front side of the connecting plate 5. A first screening plate 7 is fixedly connected to one side of the connecting plate 5. The upper surface of the first screening plate 7 has multiple first screening holes 8 and second screening holes 9. A second screening plate 10 is slidably connected to the outer side of the first screening plate 7. The second screening plate 10 is bolted to the support frame 1. The upper surface of the second screening plate 10 has multiple third screening holes 11. Two first magnet blocks 12 are fixedly connected to one side of the connecting plate 5, and two second magnet blocks 13 are fixedly connected to the other side of the connecting plate 5. Two third magnet blocks 14 are fixedly connected to one side of the support frame 1, and two fixing frames 15 are fixedly connected to one side of the support frame 1. A fourth magnet block 1 is fixedly connected to the inner side of the fixing frame 15. 6. A connecting frame 17 is fixedly connected to the outside of the fixed frame 15. A threaded rod 18 is rotatably connected inside the connecting frame 17. A limiting block 19 is threadedly connected to the outside of the threaded rod 18. The limiting block 19 is slidably connected to the inside of the fixed frame 15. Two guide columns 4 can provide guidance for the movement of the connecting plate 5. When one side of the connecting plate 5 is in contact with the front side of the support frame 1, the connecting plate 5 can drive the first screening plate 7 to move inside the second screening plate 10, so that the first screening hole 8 can coincide with the third screening hole 11, thereby screening large particles of coal and gangue. When the other side of the connecting plate 5 is in contact with the inside of the fixed frame 15, the connecting plate 5 can drive the second screening hole 9 on the surface of the first screening plate 7 to coincide with the third screening hole 11, thereby reducing the aperture of the third screening hole 11 to facilitate the screening of small particles of coal and gangue. This allows for more efficient separation of coal and gangue of different particle sizes, which helps to improve screening efficiency and flexibility.
[0026] Reference Figure 5As shown, the sweeping mechanism includes a stepper motor 20, which is fixedly connected to one side of the support frame 1. A lead screw 21 is fixedly connected to the output end of the stepper motor 20. A support plate 22 is rotatably connected to the outside of the lead screw 21. The support plate 22 is fixedly connected to the inside of the support frame 1. A moving block 23 is threadedly connected to the outside of the lead screw 21. A servo motor 24 is installed inside the moving block 23. A rotating rod 25 is fixedly connected to the output end of the servo motor 24. Multiple sweeping rods 26 are fixedly connected to the outside of the rotating rod 25. A connecting block 27 is rotatably connected to one end of the rotating rod 25. A guide rod 28 is slidably connected inside the connecting block 27. The guide rod 28 is fixedly connected to the inside of the support frame 1. The rotation of the lead screw 21 can drive the moving block 23 to move back and forth. The servo motor 24 can drive the rotating rod 25 to drive the multiple sweeping rods 26 to sweep the surface of the second screening plate 10, which helps the coal and gangue to contact the second screening plate 10 more fully. In conjunction with the vibrating screening machine 2, the screening accuracy and effect are improved.
[0027] Working principle of this utility model: This utility model designs a screen aperture switching device for coal gangue screening, the specific structure of which is shown in the attached instruction manual. Figure 1-6 As shown, in this technical solution, through the cooperation between various structures, when coal gangue needs to be screened, the coal gangue is first transported to the support frame 1 through the feed pipe 3. Then, the screening machine 2 is started. The vibration of the screening machine 2 and the screening of the second screening plate 10 can screen the coal gangue. At the same time as screening, the stepper motor 20 is started. The stepper motor 20 drives the lead screw 21 to rotate back and forth, so that the lead screw 21 drives the moving block 23 to move back and forth through the thread. The servo motor 24 is started. The servo motor 24 drives the rotating rod 25 to drive multiple sweeping rods 26 to sweep the upper surface of the second screening plate 10, thereby increasing the contact area between the coal gangue and the second screening plate 10, so that the second screening plate 10 can screen better. The connecting block 27 is slidably connected to the outside of the guide rod 28, which can provide effective support for the reciprocating sweeping of the rotating rod 25.
[0028] When the screen aperture size needs to be adjusted, push the connecting plate 5. The two guide columns 4 provide guidance for the connecting plate 5, allowing it to move the first screening plate 7 and fit against the front of the support frame 1. The two first magnets 12 and the third magnet 14 on one side of the connecting plate 5 are magnetically attracted, thus limiting the position of the connecting plate 5. Then, bolts are used to fix the connecting plate 5 to the support frame 1, allowing the multiple first screening holes 8 on the surface of the first screening plate 7 to coincide with the third screening holes 11 on the surface of the second screening plate 10, enabling the screening of large coal and gangue particles. When screening of small coal and gangue particles is required, pull the handle 6, causing it to move the connecting plate 5 so that it can fit against the inner side of the fixing frame 15. The two second magnet blocks 13 and the fourth magnet block 16 on the front side of the connecting plate 5 are magnetically attracted to each other, thereby limiting the position of the connecting plate 5. At the same time, the connecting plate 5 can pull the first screening plate 7 to move inside the second screening plate 10, so that the multiple second screening holes 9 on the surface of the first screening plate 7 coincide with the multiple third screening holes 11 on the surface of the second screening plate 10. Rotating the threaded rod 18, the threaded rod 18 can drive the limiting block 19 to move downward through the thread, so that the limiting block 19 can fit against one side of the connecting plate 5 and limit one side of the connecting plate 5, thus limiting and fixing the first screening plate 7. By coinciding the second screening holes 9 and the third screening holes 11, the internal diameter of the third screening holes 11 becomes smaller, thereby enabling the screening of smaller coal and gangue particles.
[0029] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0030] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are existing technologies and are therefore not shown in the figures and will not be described here.
[0031] In conclusion, the above are merely preferred embodiments of this utility model and are not intended to limit this utility model. 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 screen aperture switching device for coal gangue screening, comprising a support frame (1), characterized in that: The support frame (1) is equipped with a screening machine (2) at the top, and the top of the screening machine (2) is connected to a feed pipe (3). The screening machine (2) is equipped with a screening component and a sweeping mechanism inside, and the sweeping mechanism is installed above the screening component. The screening assembly includes two guide columns (4), which are fixedly connected to one side of the support frame (1). A connecting plate (5) is slidably connected to the outside of the guide column (4). The connecting plate (5) is bolted to the front side of the support frame (1). A handle (6) is fixedly connected to the front side of the connecting plate (5). A first screening plate (7) is fixedly connected to one side of the connecting plate (5). The upper surface of the first screening plate (7) is provided with a plurality of first screening holes (8) and second screening holes (9). The second screening plate (10) is slidably connected to the outside of the first screening plate (7). The second screening plate (10) is fixedly connected to the support frame (1) by bolts. Multiple third screening holes (11) are opened on the upper surface of the second screening plate (10). The sweeping mechanism includes a stepper motor (20), which is fixedly connected to one side of the support frame (1). A lead screw (21) is fixedly connected to the output end of the stepper motor (20). A support plate (22) is rotatably connected to the outside of the lead screw (21). The support plate (22) is fixedly connected to the inside of the support frame (1). The lead screw (21) is threaded to a moving block (23), and a servo motor (24) is installed inside the moving block (23). A rotating rod (25) is fixedly connected to the output end of the servo motor (24), and multiple sweeping rods (26) are fixedly connected to the outside of the rotating rod (25).
2. The screen aperture switching device for coal gangue screening according to claim 1, characterized in that: Two first magnet blocks (12) are fixedly connected to one side of the connecting plate (5), two second magnet blocks (13) are fixedly connected to the other side of the connecting plate (5), and two third magnet blocks (14) are fixedly connected to one side of the support frame (1).
3. The screen aperture switching device for coal gangue screening according to claim 1, characterized in that: Two fixed frames (15) are fixedly connected to one side of the support frame (1). A fourth magnet block (16) is fixedly connected to the inner side of the fixed frame (15). A connecting frame (17) is fixedly connected to the outer side of the fixed frame (15). A threaded rod (18) is rotatably connected inside the connecting frame (17). A limit block (19) is threadedly connected to the outer side of the threaded rod (18). The limit block (19) is slidably connected to the inner side of the fixed frame (15).
4. The screen aperture switching device for coal gangue screening according to claim 1, characterized in that: One end of the rotating rod (25) is rotatably connected to a connecting block (27), and a guide rod (28) is slidably connected inside the connecting block (27). The guide rod (28) is fixedly connected to the inner side of the support frame (1).