A pretreatment device for coal and stone waste from power plants

Abstract

This utility model discloses a pretreatment device for coal and stone waste in power plants, including a crushing box and a feeding hopper connected to the top of the crushing box. The feeding hopper is connected to a dust suction pipe, and a dust suction mechanism is connected inside the dust suction pipe. The dust suction mechanism includes a driven wheel, a rotating shaft, a fan blade, and a connecting rod. The driven wheel is connected to one end of the rotating shaft, and the other end of the rotating shaft is movably connected to the connecting rod. The end of the connecting rod is connected to the fan blade. The rotating shaft is connected to a connecting mechanism for securing the fan blade to the rotating shaft. The crushing box is connected to a crushing mechanism, which drives the driven wheel to rotate. This utility model facilitates the timely extraction of dust from inside the crushing box, preventing dust from being discharged from the feeding hopper and reducing pollution to the surrounding environment. Furthermore, the fan blade can rotate out of the dust suction pipe, at which point the fan blade is in a vertical position, facilitating thorough cleaning of the fan blade and subsequent use.

Description

Technical Field

[0001] This utility model relates to the field of power plant stone and coal waste treatment technology, specifically a pretreatment device for power plant stone and coal waste. Background Technology

[0002] Coal dust is a solid waste produced in coal-fired power plants during the coal grinding process. It is mainly composed of non-combustible impurities such as coal gangue, stones, and metal fragments. It is named for its hardness and particle size, which are similar to pebbles.

[0003] During processing, crushing is required to obtain materials with uniform particle size for subsequent use. Since the feed inlet is usually open, a large amount of dust will be discharged from the feed inlet during the crushing process. In order to reduce dust generation, water is usually sprayed at the feed inlet for dust removal. The water will combine with the dust to form a sludge that falls into the crushing box. Over time, the sludge will coat the crushing rollers. The adhered sludge will continue to accumulate, forming a thick, hard "material pad". This not only reduces the material crushing efficiency, but also aggravates the wear of the crushing rollers and shortens their service life. Utility Model Content

[0004] The purpose of this utility model is to provide a pretreatment device for coal and stone waste in power plants, which facilitates the timely extraction of dust from the inside of the crushing chamber, prevents dust from being discharged from the feed hopper, reduces pollution to the surrounding environment, facilitates comprehensive cleaning of the fan blades, and is convenient for subsequent use, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pretreatment device for power plant stone and coal waste, comprising a crushing box and a feeding hopper connected to the top of the crushing box, wherein the feeding hopper is connected to a dust suction pipe, and a dust suction mechanism is connected inside the dust suction pipe, the dust suction mechanism comprising a driven wheel, a rotating shaft, a fan blade, and a connecting rod, wherein the driven wheel is connected to one end of the rotating shaft, the other end of the rotating shaft is movably connected to the connecting rod, the end of the connecting rod is connected to the fan blade, the rotating shaft is connected to a connecting mechanism for securely connecting the fan blade to the rotating shaft, the crushing box is connected to a crushing mechanism, and the crushing mechanism is used to drive the driven wheel to rotate.

[0006] Preferably, the vacuuming mechanism further includes a guide seat, which is connected inside the vacuuming pipe, and the rotating shaft passes through the guide seat.

[0007] Preferably, the rotating shaft is rotatably connected to the guide seat and the dust extraction pipe.

[0008] Preferably, the connecting mechanism includes two guide plates, four inclined surfaces, two moving blocks, two threaded rods, a connecting seat, and two nuts. The two guide plates are distributed opposite to each other and are connected to the outside of the connecting rods. The inclined surfaces are provided on the guide plates. The moving blocks are movably connected to the guide plates. One end of the threaded rod is connected to the moving block, and the other end passes through the connecting seat. The connecting seat is connected to the rotating shaft, and the nuts are used for positioning the threaded rods.

[0009] Preferably, the nut is threadedly connected to the threaded rod, and the nut is pressed against the connecting seat.

[0010] Preferably, the end of the connecting rod is hinged to the rotation shaft.

[0011] Preferably, the crushing mechanism includes a motor, a drive wheel, two gears, and two crushing rollers. The two crushing rollers are rotatably connected to the crushing chamber. The gears are connected to the crushing rollers and the two gears are meshed together. The motor is connected to the crushing chamber, and the power output end of the motor is connected to the drive wheel. The drive wheel is connected to the gears, and the drive wheel and the driven wheel are connected by a belt drive.

[0012] Preferably, the feed hopper has an L-shaped structure and is provided with a feed inlet.

[0013] Preferably, the dust extraction pipe is detachably connected to two sealing plates, which face the fan blades.

[0014] Compared with existing technologies, the beneficial effects of this utility model are as follows: By incorporating a dust collection mechanism and a connecting mechanism, the motor synchronously drives the driven wheel to rotate during the crushing process, thereby rotating the rotating shaft, connecting rod, and fan blades. This creates a negative pressure state inside the dust collection pipe, facilitating the timely extraction of dust from the crushing chamber and preventing dust discharge from the feed hopper, thus reducing pollution to the surrounding environment. Furthermore, when the fan blades are covered with a large amount of impurities, the two sealing plates can be opened, and the two nuts can be loosened to release the threaded rod. Pulling the threaded rod away from the connecting seat further loosens the fan blades, allowing them to rotate out of the dust collection pipe. At this point, the fan blades are in a vertical position, facilitating thorough cleaning and subsequent use. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the drive wheel and the driven wheel of this utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of the dust collection pipe of this utility model;

[0018] Figure 4This is a schematic diagram of the connection mechanism and fan blade structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the guide plate structure of this utility model.

[0020] In the diagram: 1. Crushing box; 2. Feed hopper; 3. Dust suction pipe; 4. Sealing plate; 5. Motor; 6. Belt; 7. Feed inlet; 8. Drive wheel; 9. Driven wheel; 10. Rotating shaft; 11. Guide seat; 12. Fan blade; 13. Connecting rod; 14. Guide plate; 15. Inclined surface; 16. Moving block; 17. Threaded rod; 18. Connecting seat; 19. Nut. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 5 This utility model provides a pretreatment device for coal and stone waste in power plants, including a crushing box 1 and a feed hopper 2 connected to the top of the crushing box 1. The feed hopper 2 is connected to a dust suction pipe 3. A dust suction mechanism is connected inside the dust suction pipe 3. The dust suction mechanism includes a driven wheel 9, a rotating shaft 10, a fan blade 12, and a connecting rod 13. The driven wheel 9 is connected to one end of the rotating shaft 10, and the other end of the rotating shaft 10 is movably connected to the connecting rod 13. The end of the connecting rod 13 is connected to the fan blade 12. The rotating shaft 10 is connected to a connecting mechanism for securing the fan blade 12 to the rotating shaft 10. The crushing box 1 is connected to a crushing mechanism, which drives the driven wheel 9 to rotate.

[0023] During the waste crushing process, the rotation of the drive wheel 8 drives the driven wheel 9 through the belt 6. The driven wheel 9 drives the rotating shaft 10, the connecting rod 13 and the fan blade 12 to rotate, so that the inside of the dust suction pipe 3 is in a negative pressure state, which makes it easy to extract the dust inside the crushing box 1 in time, prevent the dust from being discharged from the feed hopper 2, and reduce the pollution to the surrounding environment.

[0024] The vacuuming mechanism also includes a guide seat 11, which is connected inside the vacuuming pipe 3, and the rotating shaft 10 passes through the guide seat 11. The guide seat 11 guides the rotating shaft 10 and is rotatably connected to the vacuuming pipe 3 in conjunction with the rotating shaft 10, thereby improving the stability of the rotation of the rotating shaft 10, the connecting rod 13, and the fan blade 12.

[0025] The rotating shaft 10 is rotatably connected to the guide seat 11 and the suction pipe 3.

[0026] The connecting mechanism includes two guide plates 14, four inclined surfaces 15, two moving blocks 16, two threaded rods 17, a connecting seat 18, and two nuts 19. The two guide plates 14 are distributed opposite to each other and are connected to the outside of the connecting rod 13. The inclined surfaces 15 are set on the guide plates 14. The moving blocks 16 are movably connected to the guide plates 14. One end of the threaded rod 17 is connected to the moving block 16, and the other end passes through the connecting seat 18. The connecting seat 18 is connected to the rotating shaft 10. The nuts 19 are used to position the threaded rod 17.

[0027] When the fan blade 12 needs cleaning after prolonged use, open the two sealing plates 4, loosen the two nuts 19 using a tool, and then drive the moving block 16 to move, causing the threaded rod 17 to separate from the connecting seat 18, and the moving block 16 to separate from the guide plate 14 and remove it. At this time, the connecting rod 13 and the fan blade 12 are in a loosened state. Rotate it 90° in the direction of rotation. Figure 3 The middle arrow points to the fan blade 12, which is in a vertical position and located outside the suction pipe 3. Then, use a cleaning tool to thoroughly clean the fan blade 12 for easy subsequent use.

[0028] When the fan blade 12 is cleaned and needs to be positioned and installed, screw the fan blade 12 into the dust collection pipe 3. Then, the moving block 16 is connected to the guide plate 14, and the moving block 16 is pushed to move so that the threaded rod 17 passes through the connecting seat 18. Finally, the nut 19 is used to lock the threaded rod 17 to improve the stability of the fan blade 12 installation.

[0029] Nut 19 is threadedly connected to threaded rod 17, and nut 19 is pressed against connecting seat 18. The end of connecting rod 13 is hinged to rotating shaft 10.

[0030] Because of the inclined surface 15, the threaded rod 17 applies a forward pulling force to the moving block 16, so that the moving block 16 is tightened to the inclined surface 15, that is, the fan blade 12 is pressed against the rotating shaft 10. This can improve the stability of the fan blade 12 installation and prevent the fan blade 12 from being misaligned with the rotating shaft 10. The rotation of the rotating shaft 10 can synchronously drive the rotation of the fan blade 12, and the two rotate in the same direction.

[0031] The angle between the inclined plane 15 and the horizontal plane is Figure 5 In the case of a, 5°≤a≤10°.

[0032] The crushing mechanism includes a motor 5, a drive wheel 8, two gears, and two crushing rollers. The two crushing rollers are rotatably connected inside the crushing box 1. The gears are connected to the crushing rollers and the two gears are meshed together. The motor 5 is connected to the crushing box 1, and the power output end of the motor 5 is connected to the drive wheel 8. The drive wheel 8 is connected to the gears, and the drive wheel 8 and the driven wheel 9 are connected by a belt 6.

[0033] Waste material enters the crushing chamber 1 from the feed hopper 2. The motor 5 drives the gear to rotate, which in turn drives another gear to rotate, causing the two crushing rollers to move towards each other, which facilitates the crushing and processing of the waste material and obtains uniform waste material. Finally, the waste material is discharged from the bottom outlet of the crushing chamber 1.

[0034] The feed hopper 2 has an L-shaped structure and a feed inlet 7. The feed inlet 7 has an arc-shaped guide surface and a smooth structure, allowing materials to slide smoothly into the crushing chamber 1 for pre-processing. The L-shaped design of the feed hopper 2 replaces the traditional upward-facing feed inlet 7, avoiding the flying of waste materials during crushing and preventing significant safety hazards to personnel.

[0035] The dust extraction duct 3 is detachably connected to two sealing plates 4. The detachable connection is usually a bolt connection, which improves the stability of the sealing plate 4 installation and facilitates the disassembly of the sealing plate 4. The sealing plate 4 faces the fan blade 12.

[0036] Working principle: Waste material is fed into the crushing chamber 1 through the feed hopper 2 for pre-processing crushing. The drive wheel 8 drives the driven wheel 9 to rotate via the belt 6, thereby rotating the rotating shaft 10, connecting rod 13, and fan blade 12. This creates a negative pressure inside the dust extraction pipe 3, facilitating the timely extraction of dust from the crushing chamber 1 and preventing dust from being discharged from the feed hopper 2, thus reducing pollution to the surrounding environment and achieving good dust extraction. When the fan blade 12 is heavily dusty and needs cleaning, the two sealing plates 4 are opened, and the nut 19 is loosened using a tool. This pushes the moving block 16 to move and disengage from the guide plate 14. At this time, the threaded rod 17 separates from the connecting seat 18, and the fan blade 12 is in a loosened state. The fan blade 12 then rotates 90°, making it vertical and located outside the dust extraction pipe 3. The fan blade 12 is then cleaned using a cleaning tool to improve its cleanliness and facilitate subsequent use. When the fan blade 12 is cleaned and needs to be installed, rotate the fan blade 12 so that it is inside the dust suction pipe 3, connect the moving block 16 to the guide plate 14, pass the threaded rod 17 through the connecting seat 18, and use a tool to tighten the nut 19 so that the nut 19 is pressed against the connecting seat 18, thereby improving the stability of the fan blade 12 installation. Finally, install and fix the two sealing plates 4.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for coal and stone waste from power plants, comprising a crushing chamber (1) and a feed hopper (2) connected to the top of the crushing chamber (1), characterized in that, The feed hopper (2) is connected to a dust suction pipe (3), and a dust suction mechanism is connected inside the dust suction pipe (3). The dust suction mechanism includes a driven wheel (9), a rotating shaft (10), a fan blade (12), and a connecting rod (13). The driven wheel (9) is connected to one end of the rotating shaft (10), and the other end of the rotating shaft (10) is movably connected to the connecting rod (13). The end of the connecting rod (13) is connected to the fan blade (12). The rotating shaft (10) is connected to a connecting mechanism for firmly connecting the fan blade (12) and the rotating shaft (10). The crushing box (1) is connected to a crushing mechanism, which is used to drive the driven wheel (9) to rotate.

2. The pretreatment device for power plant waste stone and coal according to claim 1, characterized in that, The vacuuming mechanism also includes a guide seat (11), which is connected inside the vacuuming pipe (3), and the rotating shaft (10) passes through the guide seat (11).

3. A pretreatment device for power plant coal and stone waste according to claim 2, characterized in that, The rotating shaft (10) is rotatably connected to the guide seat (11) and the dust suction pipe (3).

4. A pretreatment device for power plant coal and stone waste according to claim 1, characterized in that, The connecting mechanism includes two guide plates (14), four inclined surfaces (15), two moving blocks (16), two threaded rods (17), a connecting seat (18), and two nuts (19). The two guide plates (14) are distributed opposite to each other and are connected to the outside of the connecting rod (13). The inclined surfaces (15) are set on the guide plates (14). The moving blocks (16) are movably connected to the guide plates (14). One end of the threaded rod (17) is connected to the moving block (16), and the other end passes through the connecting seat (18). The connecting seat (18) is connected to the rotating shaft (10). The nuts (19) are used to position the threaded rod (17).

5. A pretreatment device for power plant coal and stone waste according to claim 4, characterized in that, The nut (19) is threadedly connected to the threaded rod (17), and the nut (19) is pressed against the connecting seat (18).

6. A pretreatment device for power plant waste stone and coal according to claim 1, characterized in that, The end of the connecting rod (13) is hinged to the rotating shaft (10).

7. A pretreatment device for power plant waste stone and coal according to claim 1, characterized in that, The crushing mechanism includes a motor (5), a drive wheel (8), two gears, and two crushing rollers. The two crushing rollers are rotatably connected inside the crushing box (1). The gears are connected to the crushing rollers, and the two gears are meshed together. The motor (5) is connected to the crushing box (1), and the power output end of the motor (5) is connected to the drive wheel (8). The drive wheel (8) is connected to the gears, and the drive wheel (8) and the driven wheel (9) are connected by a belt (6).

8. A pretreatment device for power plant coal and stone waste according to claim 1, characterized in that, The feed hopper (2) has an L-shaped structure and is provided with a feed inlet (7).

9. A pretreatment device for power plant coal and stone waste according to claim 1, characterized in that, The dust extraction pipe (3) is detachably connected to two sealing plates (4), which face the fan blades (12).

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