Screening device for coal-based solid waste

Abstract

The utility model discloses a screening device for coal-based solid waste, and relates to the field of coal-based solid waste screening equipment. According to the technical scheme, the screening device for the coal-based solid waste comprises a screening box, an inclined screen is arranged in the screening box, a first discharging pipe is arranged outside the screening box, the upper end of the first discharging pipe communicates with the side face, close to the lower side of the screen, of the screening box, and the lower end of the first discharging pipe is connected with a belt conveyor; a second discharging pipe is arranged below the screen, the upper end of the second discharging pipe communicates with the bottom of the screening box, the lower end of the second discharging pipe communicates with a collecting box, and a powder conveying pump is installed in the collecting box. The full-automatic screening device has the advantages that full-automatic operation of the whole device is achieved, complexity and inconvenience of manual collection are avoided, high efficiency and accuracy of the screening process are guaranteed, and therefore the overall working efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the field of coal-based solid waste screening equipment, in particular to a screening device for coal-based solid waste. Background Art

[0002] The coal-based solid waste screening device plays a vital role in the process of coal mining and utilization. It can effectively distinguish between larger coal gangue and smaller fly ash, and realize the refined treatment of coal-based solid waste. The application of coal-based solid waste screening devices not only improves the efficiency of coal-based solid waste treatment, but also makes subsequent landfill work more targeted and avoids waste of resources. Through screening, it can ensure that coal gangue and fly ash are reasonably utilized and treated, reducing potential harm to the environment. In addition, the application of coal-based solid waste screening devices has also promoted the development of environmental protection technology and promoted the green transformation of the coal industry. In the future, with the continuous advancement of technology, coal-based solid waste screening devices will play a more important role in improving coal utilization efficiency and protecting the ecological environment.

[0003] The existing screening device mainly uses an inclined screen to separate the gangue and fly ash. As shown in the patent with announcement number CN 217569646 U and announcement date 2022.10.14, an inclined screen is arranged inside the box, and a dragon screw is arranged on the lower side of the screen. The smaller fly ash slides through the mesh of the screen, and the larger gangue slides onto the dragon screw and is transported out by the dragon screw.

[0004] However, the gangue lifted up by the Jiaolong screw and the fly ash slipping through the screen mesh still need to be collected manually. This process is not only time-consuming and labor-intensive, but also inevitably affects the overall screening efficiency. Summary of the invention

[0005] In view of the problem that screened coal gangue and fly ash need to be collected manually, which affects the overall screening efficiency, the utility model provides a screening device for coal-based solid waste which can automatically collect and transport the screened coal gangue and fly ash without reducing the overall screening efficiency.

[0006] In order to solve the above problems, the technical solution adopted by the utility model is a screening device for coal-based solid waste, including a screening box, an inclined screen is arranged inside the screening box, a first feed pipe is arranged outside the screening box, the upper end of the first feed pipe is connected to the side of the screening box close to the lower side of the screen, and the lower end of the first feed pipe is connected to a belt conveyor; a second feed pipe is arranged below the screen, the upper end of the second feed pipe is connected to the bottom of the screening box, and the lower end of the second feed pipe is connected to a collection box, and a powder conveying pump is installed inside the collection box. The coal gangue naturally slides along the inclined surface of the screen to the first feed pipe, and then falls on the belt conveyor and is transported to the predetermined position by it. The fly ash passes through the mesh of the screen, enters the collection box through the second feed pipe, and is then accurately blown to the predetermined position by the powder conveying pump. The entire device realizes automated operation, which not only avoids the tediousness of manual collection, but also ensures the efficient progress of the screening process, thereby improving the overall work efficiency.

[0007] Preferably, a fixed frame is provided on the belt conveyor, and an inclined feeding chute is provided on the fixed frame. The feeding chute is located opposite to the lower end of the first feeding pipe, and the higher end of the feeding chute is fixedly connected to the fixed frame. The feeding chute guides the gangue to fall smoothly on the belt conveyor, and at the same time plays a buffering role, effectively protecting the belt conveyor from impact and damage.

[0008] Preferably, a first vibration motor is installed on the fixed frame, and the first vibration motor can vibrate the feeding trough. The first vibration motor applies vibration to the feeding trough, effectively preventing the accumulation of coal gangue in the feeding trough, ensuring smooth and unobstructed transportation of coal gangue, and improving screening efficiency.

[0009] Preferably, an ash collecting hopper is provided below the screen, and the lower end of the ash collecting hopper is connected to the upper end of the second feeding pipe. The ash collecting hopper collects the fly ash sliding off the screen and guides it into the second feeding pipe to ensure the continuous collection and efficient transportation of the fly ash.

[0010] Preferably, a feed inlet is provided at the top of the screening box, and a sealing door is installed on the feed inlet. When the coal-based solid waste is poured into the screening box from the feed inlet, the sealing door can effectively prevent the coal-based solid waste from escaping from the screening box.

[0011] Preferably, an electromagnet is fixed on the top of the screening box, a metal rod is adsorbed below the electromagnet, an inclined guide plate is provided on the metal rod, the guide plate is positioned opposite to the feed inlet, the higher side of the guide plate is fixedly connected to the metal rod, and the lower side of the guide plate is located above the higher side of the screen. When the coal-based solid waste enters from the feed inlet, it first falls on the guide plate, and its impact force causes the metal rod to be temporarily separated from the electromagnet. After the material is poured, the electromagnet quickly adsorbs and fixes the metal rod again. Subsequently, the guide plate smoothly transports the coal-based solid waste to the higher side of the screen, which can effectively extend the screening stroke and ensure that the coal-based solid waste is more fully screened.

[0012] Preferably, a mounting frame is further provided outside the screening box, on which a chain plate conveyor belt is provided, and a charging box is fixed on the chain plate of the chain plate conveyor belt. The charging box can load coal-based solid waste, and the chain plate conveyor belt, with its stable conveying capacity, transports the coal-based solid waste to the feed port, thereby ensuring the continuity and efficiency of the screening operation.

[0013] Preferably, an empty chain plate is provided between adjacent charging boxes, which can effectively prevent the coal-based solid waste in the next charging box from accidentally spilling out when the previous charging box is unloading, thereby ensuring the neatness and efficiency of the screening operation.

[0014] Preferably, a dust suction fan is provided above the feed port, and a filter is installed at the inlet of the dust suction fan. The dust suction fan can capture the dust generated during the feeding process of the screening box, and effectively maintain the cleanliness of the working environment. At the same time, the presence of the filter ensures that large particles will not enter the dust suction fan, thereby avoiding the risk of equipment damage and ensuring the safety and stability of the screening operation.

[0015] Preferably, a second vibration motor is fixed on the screening box, and the second vibration motor can vibrate the screen. The second vibration motor applies vibration to the screen, effectively preventing the gangue from getting stuck on the screen, ensuring that it slides smoothly into the first feeding pipe, thereby ensuring the continuity and efficiency of the screening process.

[0016] It can be seen from the above technical solutions that the advantages of the utility model are: the chain conveyor belt accurately delivers the coal-based solid waste into the screening box, wherein the coal gangue slides into the first discharge pipe along the inclined surface of the screen, then falls smoothly on the belt conveyor and is transported to the predetermined position. The fine fly ash easily passes through the mesh of the screen, smoothly enters the collection box along the second discharge pipe, and is then accurately blown to the designated position by the powder delivery pump. In summary, the entire device realizes fully automated operation, which not only gets rid of the tediousness and inconvenience of manual collection, but also ensures the efficiency and accuracy of the screening process, thereby significantly improving the overall work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0019] Figure 2 It is a schematic diagram of the structure of the chain conveyor belt in a specific implementation manner of the utility model.

[0020] Figure 3 for Figure 1 A partial enlarged view of point A in the middle.

[0021] Description of main reference numerals

[0022] In the figure: 1. screening box, 11. feeding port, 12. ash collecting hopper, 13. second feeding pipe, 14. screen, 15. second vibration motor, 16. first feeding pipe, 17. material guide plate, 2. belt conveyor, 21. fixing frame, 22. feeding chute, 23. first vibration motor, 3. collecting box, 4. powder conveying pump, 5. mounting frame, 6. chain conveyor belt, 61. charging box, 62. empty chain plate, 7. electromagnet, 71. metal rod. DETAILED DESCRIPTION

[0023] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0024] A screening device for coal-based solid waste includes a screening box 1, which can screen the coal-based solid waste. A mounting frame 5 is provided outside the screening box 1, and a chain plate conveyor belt 6 is provided on the mounting frame 5, and the chain plate conveyor belt 6 can transport the coal-based solid waste into the screening box 1. A belt conveyor 2 is also provided outside the screening box 1, and the belt conveyor 2 can deliver the screened coal gangue to a designated location. A collecting box 3 is provided below the screening box 1, and a powder conveying pump 4 is installed inside the collecting box 3, and the powder conveying pump 4 can blow the screened fly ash to a designated location.

[0025] like Figure 1As shown, in this specific embodiment, the screening box 1 specifically adopts the following structure: an inclined screen 14 is arranged inside the screening box 1, and the outer ring of the screen 14 is fixed to the inner wall of the screening box 1 by a snap connection. A second vibration motor 15 is fixed to the screening box 1, and the output end of the second vibration motor 15 is connected to the screen 14. The second vibration motor 15 can apply vibration to the screen 14, effectively preventing the gangue from getting stuck on the screen 14. An ash collecting hopper 12 is arranged below the screen 14, and the ash collecting hopper 12 is fixed to the bottom of the screening box 1, and the upper end of the ash collecting hopper 12 is directly opposite to the screen 14. A second feeding pipe 13 is arranged below the ash collecting hopper 12, and the upper end of the second feeding pipe 13 is connected to the lower end of the ash collecting hopper 12, and the lower end of the second feeding pipe 13 is connected to the collecting box 3. A discharge port is arranged on the side of the screening box 1, and the discharge port is located on the side of the screening box 1 close to the lower side of the screen 14. A first discharge pipe 16 is disposed outside the screening box 1 , the upper end of the first discharge pipe 16 is communicated with the discharge port, and the lower end of the first discharge pipe 16 is opposite to the belt conveyor 2 .

[0026] In this embodiment, a feed port 11 is provided at the top of the screening box 1, and the coal-based solid waste enters the screening box 1 from the feed port 11. A sealing door is installed on the feed port 11, and the sealing door is made of a highly elastic rubber material. When the coal-based solid waste is poured onto the sealing door, the sealing door automatically opens under pressure, allowing the coal-based solid waste to smoothly enter the screening box 1. After the coal-based solid waste completely enters the screening box 1, the sealing door quickly returns to a closed state with its good resilience, effectively preventing the coal-based solid waste from escaping from the feed port 11 during the screening process, ensuring the cleanliness and efficiency of the screening operation.

[0027] In other embodiments, a dust suction fan is provided above the feed port 11, the inlet of the dust suction fan is opposite to the feed port 11, and a filter screen is installed at the inlet of the dust suction fan, and the filter screen and the dust suction fan are detachably connected. In the process of pouring coal-based solid waste from the feed port 11 into the screening box 1, dust will inevitably be generated. The dust suction fan can quickly capture and absorb the scattered dust to ensure the cleanliness of the working environment. At the same time, the filter screen at the inlet of the dust suction fan can finely filter the dust and prevent large particles from entering the dust suction fan, thereby reducing the risk of equipment damage.

[0028] like Figure 3 As shown, in this embodiment, an electromagnet 7 is also provided on the top of the screening box 1. The electromagnet 7 is fixed to the top of the screening box 1 by bolts, and the electromagnet 7 is in an energized state and has magnetism. A metal rod 71 is adsorbed below the electromagnet 7, and a guide plate 17 is provided on the metal rod 71. The position of the guide plate 17 is opposite to the feed inlet 11, and the guide plate 17 is tilted, with an inclination angle of 15-25 degrees. The higher side of the guide plate 17 is connected to the metal rod 71 by welding, and the lower side of the guide plate 17 is located above the higher side of the screen 14.

[0029] In this specific embodiment, the belt conveyor 2 specifically adopts the following structure: the belt conveyor 2 includes fixed plates on both sides, and fixed frames 21 are arranged on the fixed plates on both sides of the belt conveyor 2. The fixed frames 21 are provided with inclined feed troughs 22, and the feed troughs 22 are made of wear-resistant materials. The position of the feed troughs 22 is opposite to the lower end of the first feed pipe 16. The higher end of the feed trough 22 is fixedly connected to the fixed frame 21 by bolts, and the distance between the lower end of the feed trough 22 and the conveying belt of the belt conveyor 2 is 3-5 cm.

[0030] In other embodiments, a first vibration motor 23 is installed on the fixed frame 21, and the output end of the first vibration motor 23 is connected to the feed chute 22. The first vibration motor 23 can apply vibration to the feed chute 22, effectively preventing the accumulation of coal gangue in the feed chute 22, and ensuring that the coal gangue is smoothly transported to the belt conveyor 2.

[0031] like Figure 2 As shown, in this specific embodiment, the mounting frame 5 specifically adopts the following structure: the mounting frame 5 is placed vertically, and the chain plate conveyor belt 6 is also placed vertically. A chain plate is installed on the chain plate conveyor belt 6, and a charging box 61 is arranged on the chain plate. The charging box 61 is fixedly connected to the chain plate by bolts, and the charging box 61 can load coal-based solid waste. When the chain plate conveyor belt 6 rotates, the charging box 61 remains in a vertical state during the rising process, and the charging port of the charging box 61 faces upward. When the charging box 61 reaches the highest point, the charging box 61 will become horizontal, and the charging port of the charging box 61 faces the feed port 11, and the coal-based solid waste in the charging box 61 will be poured into the screening box 1 for subsequent screening processing. In other embodiments, the charging boxes 61 are placed at intervals, that is, an empty chain plate 62 is arranged between adjacent charging boxes 61, which can effectively prevent the coal-based solid waste in the next charging box 61 from accidentally spilling when the previous charging box 61 is unloading.

[0032] The specific use process of the utility model is as follows: first, start the chain plate conveyor belt 6, and the loading box 61 begins to load the coal-based solid waste. Subsequently, the loading box 61 is transported to the feed port 11 by the chain plate conveyor belt 6, and the coal-based solid waste is dumped there. When the coal-based solid waste contacts the sealing door of the feed port 11, the sealing door is automatically opened under pressure, and the coal-based solid waste then falls on the guide plate 17. Due to the impact of the coal-based solid waste, the metal rod 71 on the guide plate 17 is temporarily separated from the electromagnet 7. Once the dumping is completed, the electromagnet 7 will quickly re-absorb and fix the metal rod 71 to ensure stable operation of the system.

[0033] The dust generated during the material discharge process is quickly sucked away by the dust suction fan to ensure a clean working environment. The coal-based solid waste slides on the guide plate 17 and slides to the higher side of the screen 14. At this time, the second vibration motor 15 starts to work, and its vibration causes the coal gangue in the coal-based solid waste to pass through the screen 14 and fall into the feeding trough 22 through the first feeding pipe 16. Subsequently, under the vibration of the first vibration motor 23, the coal gangue slides from the feeding trough 22 to the belt conveyor 2, and is transported to the designated location by it.

[0034] At the same time, the fly ash in the coal-based solid waste passes through the mesh of the screen 14 and falls into the ash collecting hopper 12. The ash collecting hopper 12 collects the fly ash and transports it to the collection box 3 through the second discharge pipe 13. Finally, the fly ash is accurately blown to the predetermined position by the powder delivery pump 4, completing the entire screening and transportation process.

[0035] It can be seen from the above embodiments that the beneficial effect of the utility model is that the chain conveyor belt accurately delivers coal-based solid waste into the screening box, wherein the coal gangue slides into the first discharge pipe along the inclined surface of the screen, then falls smoothly on the belt conveyor and is transported to the predetermined position. The fine fly ash easily passes through the mesh of the screen, smoothly enters the collection box along the second discharge pipe, and is then accurately blown to the designated position by the powder delivery pump. In summary, the entire device realizes fully automated operation, which not only gets rid of the tediousness and inconvenience of manual collection, but also ensures the efficiency and accuracy of the screening process, thereby significantly improving the overall work efficiency.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screening device for coal-based solid waste, comprising a screening box (1), wherein an inclined screen (14) is arranged inside the screening box (1), characterized in that: A first feed pipe (16) is arranged outside the screening box (1), the upper end of the first feed pipe (16) is connected to the side of the screening box (1) close to the lower side of the screen (14), and the lower end of the first feed pipe (16) is connected to the belt conveyor (2); a second feed pipe (13) is arranged below the screen (14), the upper end of the second feed pipe (13) is connected to the bottom of the screening box (1), and the lower end of the second feed pipe (13) is connected to the collecting box (3), and a powder conveying pump (4) is installed inside the collecting box (3).

2. The screening device for coal-based solid waste according to claim 1, characterized in that: A fixed frame (21) is arranged on the belt conveyor (2), and an inclined material discharge chute (22) is arranged on the fixed frame (21). The position of the material discharge chute (22) is opposite to the lower end of the first material discharge pipe (16), and the higher end of the material discharge chute (22) is fixedly connected to the fixed frame (21).

3. The screening device for coal-based solid waste according to claim 2, characterized in that: A first vibration motor (23) is installed on the fixed frame (21), and the first vibration motor (23) can vibrate the feed chute (22).

4. The screening device for coal-based solid waste according to claim 1, characterized in that: An ash collecting hopper (12) is arranged below the screen (14), and the lower end of the ash collecting hopper (12) is connected to the upper end of the second feeding pipe (13).

5. The screening device for coal-based solid waste according to claim 1, characterized in that: A feed inlet (11) is provided at the top of the screening box (1), and a sealing door is installed on the feed inlet (11).

6. The screening device for coal-based solid waste according to claim 5, characterized in that: An electromagnet (7) is fixed on the top of the screening box (1), a metal rod (71) is adsorbed below the electromagnet (7), an inclined material guide plate (17) is arranged on the metal rod (71), the position of the material guide plate (17) is opposite to the feed inlet (11), the higher side of the material guide plate (17) is fixedly connected to the metal rod (71), and the lower side of the material guide plate (17) is located above the higher side of the screen (14).

7. The screening device for coal-based solid waste according to claim 1, characterized in that: A mounting frame (5) is also provided outside the screening box (1), a chain plate conveyor belt (6) is provided on the mounting frame (5), and a charging box (61) is fixed on the chain plate of the chain plate conveyor belt (6).

8. The screening device for coal-based solid waste according to claim 7, characterized in that: Empty chain plates (62) are arranged between adjacent charging boxes (61).

9. The screening device for coal-based solid waste according to claim 5, characterized in that: A dust suction fan is arranged above the feed inlet (11), and a filter screen is installed at the inlet of the dust suction fan.

10. The screening device for coal-based solid waste according to claim 1, characterized in that: A second vibration motor (15) is fixed on the screening box (1), and the second vibration motor (15) can vibrate the screen (14).

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