Efficient screening and impurity removing device for pulverized coal production

Abstract

The utility model relates to the technical field of pulverized coal production, and discloses an efficient screening and impurity-removing device for pulverized coal production, which comprises a vibrating screen main body, the bottom of the vibrating screen main body is fixedly connected with a bottom frame, the bottom of the vibrating screen main body is fixedly connected with a vibrating motor, and a screen mesh is connected close to the top in the vibrating screen main body. The portion, close to the front portion of the screen, of the interior of the vibrating screen body is fixedly connected with an impurity discharging plate, the portion, located at the bottom of the impurity discharging plate, of the interior of the vibrating screen body is fixedly connected with a pulverized coal discharging plate, the portion, close to the rear portion, of the top of the vibrating screen body is fixedly connected with a feeding cylinder, and the portion, close to the top, of the interior of the feeding cylinder is rotationally connected with a scattering frame. Two baffles are rotationally connected to the positions, located at the bottom of the scattering frame, in the feeding barrel, the pulverized coal is preliminarily crushed through rotation of the scattering frame, caking is prevented, meanwhile, the baffles are kept closed in the scattering stage, a temporary storage area is formed, it is ensured that the pulverized coal enters the screening procedure after being fully scattered, and the situation that the untreated pulverized coal directly impacts a screen is avoided.

Description

Technical Field

[0001] This utility model relates to the field of coal powder production technology, specifically to a high-efficiency screening and impurity removal device for coal powder production. Background Technology

[0002] In the field of pulverized coal production technology, pulverized coal is an important fuel or raw material for industries such as thermal power generation, metallurgy, and chemical industry. Its particle size distribution, purity, and combustion performance directly affect production efficiency and environmental protection indicators. The main focus is on the efficient crushing, grinding, and fine processing of coal resources. By optimizing raw material pretreatment, grinding processes, drying, and sorting technologies, the goal of controllable pulverized coal particle size and stable calorific value can be achieved.

[0003] Traditional coal powder preparation relies on mechanical grinding and sieving, but it is prone to agglomeration. Agglomeration causes coal powder particles to clump together into larger lumps, making it difficult for impurities encased in them to be separated through the sieve, resulting in impurity residue or coal powder being mistakenly screened out along with impurities. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency screening and impurity removal device for pulverized coal production, so as to solve the problem that existing devices are difficult to screen agglomerated pulverized coal, resulting in residual impurities or pulverized coal being mistakenly screened out along with impurities.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-efficiency screening and impurity removal device for pulverized coal production, comprising a vibrating screen body, a base frame fixedly connected to the bottom of the vibrating screen body, a vibrating motor fixedly connected to the bottom of the vibrating screen body, a screen mesh connected to the top of the vibrating screen body, a debris discharge plate fixedly connected to the front of the screen mesh inside the vibrating screen body, a pulverized coal discharge plate fixedly connected to the bottom of the debris discharge plate inside the vibrating screen body, a feed cylinder fixedly connected to the rear of the top of the vibrating screen body, a disintegrating frame rotatably connected to the top of the feed cylinder, two baffles rotatably connected to the bottom of the disintegrating frame inside the feed cylinder, and a discharge inclined plate fixedly connected to the bottom of the baffles inside the feed cylinder.

[0006] Preferably, a main gear is rotatably connected to one side of the feed cylinder near the top, a sector block is rotatably connected to one side of the feed cylinder and at the bottom of the main gear, a straight tooth block is slidably connected to one side of the feed cylinder and at the bottom of the sector block, two auxiliary gears are symmetrically rotatably connected to one side of the feed cylinder and at the bottom of the straight tooth block, a slide rail is fixedly connected to the top of the sector block, an arc-shaped tooth block is slidably connected to the top of the sector block via the slide rail, and stop blocks are fixedly connected to both ends of the top of the sector block near the slide rail.

[0007] Preferably, both of the auxiliary gears mesh with the bottom of the spur gear block, and the arc-shaped gear block meshes with the main gear.

[0008] Preferably, the bottom of the sector block is provided with a transmission tooth groove, which meshes with the top of the straight tooth block.

[0009] Preferably, one end of the disintegrating frame passes through one side of the feed cylinder and is fixedly connected to the side of the main gear, and one end of each of the two baffles passes through one side of the feed cylinder and is fixedly connected to the side of each of the two auxiliary gears.

[0010] Preferably, a rotating cover is rotatably connected to the other side of the feed cylinder, a reciprocating gear is rotatably connected to the other side of the feed cylinder and inside the rotating cover, and a residual gear is rotatably connected to the other side of the feed cylinder and at the center of the rotating cover. The inner wall of the rotating cover has a residual gear groove. The reciprocating gear meshes with the residual gear, the reciprocating gear and the residual gear groove are adaptively matched, the residual gear is fixedly connected to the rotating cover, and the reciprocating gear is fixedly connected to the other end of the disassembly frame.

[0011] Preferably, a fixing frame is fixedly connected to the other side of the feed cylinder and located on the outer surface of the rotating cover, and a motor is fixedly connected to the side of the fixing frame. The output shaft of the motor passes through the side of the fixing frame and is fixedly connected to the rotating cover.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The coal powder is initially crushed by rotating the crushing frame to prevent agglomeration. At the same time, the baffle remains closed during the crushing stage to form a temporary storage area, ensuring that the coal powder is fully crushed before entering the screening process, and avoiding untreated coal powder from directly impacting the screen.

[0014] The main gear drives the sector block, spur block and auxiliary gear in linkage to ensure that the opening and closing of the baffle is synchronized with the rotation of the disintegration frame, avoiding operational conflicts. The movement range of the arc-shaped tooth block is limited by the slide rail and the stop block, which precisely controls the disintegration time and the rhythm of the baffle action, and improves the coordination of the process.

[0015] The reciprocating gears driven by the residual tooth grooves inside the rotating hood rotate in both directions, causing the coal powder crushing frame to rotate periodically in both directions, which enhances the coal powder crushing effect, reduces dead angles, and the baffle opens and closes periodically with the movement of the coal powder crushing frame, realizing the cyclical operation of coal powder crushing and feeding, and improving the continuity of processing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a high-efficiency screening and impurity removal device for pulverized coal production according to an embodiment of the present invention;

[0017] Figure 2 This is a cross-sectional view of the feed cylinder in an embodiment of this utility model;

[0018] Figure 3 This is a side view of the feed cylinder in an embodiment of this utility model;

[0019] Figure 4 This is a disassembled view of the other side component of the feed cylinder in an embodiment of this utility model;

[0020] Figure 5 This is a diagram illustrating the rotating cover in an embodiment of this utility model.

[0021] In the diagram: 1. Vibrating screen body; 2. Base frame; 3. Vibrating motor; 4. Screen; 5. Debris discharge plate; 6. Coal powder discharge plate; 7. Feed cylinder; 8. Dispersing frame; 9. Baffle; 10. Discharge inclined plate; 11. Main gear; 12. Sector block; 13. Straight tooth block; 14. Secondary gear; 15. Slide rail; 16. Arc-shaped tooth block; 17. Stop block; 18. Transmission tooth groove; 19. Rotating cover; 20. Reciprocating gear; 21. Fixed frame; 22. Motor; 23. Residual gear; 24. Residual tooth groove. Detailed Implementation

[0022] 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.

[0023] Example 1

[0024] Combination Figure 1 - Figure 5 A high-efficiency screening and impurity removal device for pulverized coal production includes a vibrating screen body 1, a base frame 2 fixedly connected to the bottom of the vibrating screen body 1, a vibrating motor 3 fixedly connected to the bottom of the vibrating screen body 1, a screen 4 connected to the top of the vibrating screen body 1, a debris discharge plate 5 fixedly connected to the front of the screen 4 inside the vibrating screen body 1, a pulverized coal discharge plate 6 fixedly connected to the bottom of the debris discharge plate 5 inside the vibrating screen body 1, a feed cylinder 7 fixedly connected to the rear of the top of the vibrating screen body 1, a disintegrating frame 8 rotatably connected to the top of the feed cylinder 7, two baffles 9 rotatably connected to the bottom of the disintegrating frame 8 inside the feed cylinder 7, and a discharge inclined plate 10 fixedly connected to the bottom of the baffles 9 inside the feed cylinder 7.

[0025] In actual operation, the coal powder to be screened is put into the inside of the feed cylinder 7, and then the dispersing frame 8 is rotated to disperse the coal powder inside the feed cylinder 7. After being dispersed, the coal powder will fall along the discharge inclined plate 10 to the top of the screen 4. Then the vibration motor 3 is started to drive the vibrating screen body 1 and the screen 4 to vibrate together. The impurities will be discharged through the impurity discharge plate 5 during the vibration process. The screened coal powder will fall into the inside of the vibrating screen body 1 and then be discharged through the coal powder discharge plate 6.

[0026] See Figure 3 A main gear 11 is rotatably connected to one side of the feed cylinder 7 near the top. A sector block 12 is rotatably connected to one side of the feed cylinder 7 and at the bottom of the main gear 11. A straight tooth block 13 is slidably connected to one side of the feed cylinder 7 and at the bottom of the sector block 12. Two auxiliary gears 14 are symmetrically rotatably connected to one side of the feed cylinder 7 and at the bottom of the straight tooth block 13. A slide rail 15 is fixedly connected to the top of the sector block 12. An arc-shaped tooth block 16 is slidably connected to the top of the sector block 12 through the slide rail 15. Stop blocks 17 are fixedly connected to both ends of the top of the sector block 12 near the slide rail 15.

[0027] Specifically, when the dispersing frame 8 is not rotating, the arc-shaped toothed block 16 meshes with the main gear 11, and the arc-shaped toothed block 16 is pressed against the stop block 17 on one side, which causes the fan-shaped block 12 to stop, and the straight toothed block 13 along with the two auxiliary gears 14 to be in a stationary state. Therefore, the two baffles 9 are in a horizontal state. Thus, the coal powder entering the feed cylinder 7 will be blocked by the two baffles 9 and cannot continue to fall. At this time, the dispersing frame 8 rotates, which drives the main gear 11 to rotate synchronously, which in turn drives the arc-shaped toothed block 16 to slide along the slide rail 15 until it is pressed against the stop block 17 on the other side. At this time, the main gear 11 continues to rotate, which in turn drives the arc-shaped toothed block 16 along with the stop block 17 and the fan-shaped block 12 to rotate synchronously. Then, through the transmission tooth groove 18, it drives the straight toothed block 13 to rotate together, which in turn drives the two auxiliary gears 14 to rotate, which in turn drives the two baffles 9 to rotate. At this time, the dispersed coal powder can fall to the top of the discharge inclined plate 10 and be put into the vibrating screen process.

[0028] As the main gear 11 rotates, it drives the arc-shaped toothed block 16 to slide along the slide rail 15 until it is squeezed by the stop block 17 on the other side, which is the time for the coal powder to be broken up by the breaker 8.

[0029] See Figure 3 Both auxiliary gears 14 mesh with the bottom of the spur gear block 13, and the arc-shaped gear block 16 meshes with the main gear 11.

[0030] See Figure 3 The bottom of the sector block 12 is provided with a transmission tooth groove 18, which meshes with the top of the straight tooth block 13.

[0031] See Figure 3 One end of the disintegrating frame 8 passes through one side of the feed cylinder 7 and is fixedly connected to the side of the main gear 11. One end of each of the two baffles 9 passes through one side of the feed cylinder 7 and is fixedly connected to the side of each of the two auxiliary gears 14.

[0032] See Figure 4 and Figure 5A rotating cover 19 is rotatably connected to the other side of the feed cylinder 7. A reciprocating gear 20 is rotatably connected to the other side of the feed cylinder 7 and inside the rotating cover 19. A residual gear 23 is rotatably connected to the other side of the feed cylinder 7 and at the center of the inner circle of the rotating cover 19. A residual tooth groove 24 is provided on the inner wall of the rotating cover 19. The reciprocating gear 20 and the residual gear 23 mesh with each other. The reciprocating gear 20 and the residual tooth groove 24 are adaptively matched. The residual gear 23 is fixedly connected to the rotating cover 19. The reciprocating gear 20 is fixedly connected to the other end of the disintegrating frame 8.

[0033] Specifically, the motor 22 is started, which drives the rotating cover 19 to rotate, thereby driving the residual gear 23 to rotate synchronously. This causes the reciprocating gear 20 to rotate clockwise, thus driving the dispersing frame 8 to rotate clockwise. When the reciprocating gear 20 no longer meshes with the residual gear 23, the reciprocating gear 20 begins to mesh with the residual tooth groove 24, thereby causing the rotating cover 19 to rotate counterclockwise. Through the residual tooth groove 24, the reciprocating gear 20 rotates counterclockwise, which in turn drives the dispersing frame 8 to rotate counterclockwise. Therefore, the rotating cover 19 rotates counterclockwise, causing the dispersing frame 8 to switch back and forth between clockwise and counterclockwise rotation. This causes the two baffles 9 to switch back and forth between opening and closing. When the two baffles 9 are closed, the coal powder that has just been put into the feed cylinder 7 begins to be dispersed. When the two baffles 9 are open, the dispersed coal powder begins to fall onto the vibrating screen.

[0034] See Figure 4 and Figure 5 A fixed frame 21 is fixedly connected to the other side of the feed cylinder 7 and to the outer surface of the rotating cover 19. A motor 22 is fixedly connected to the side of the fixed frame 21. The output shaft of the motor 22 passes through the side of the fixed frame 21 and is fixedly connected to the rotating cover 19.

[0035] 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 the 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 high-efficiency screening and impurity removal device for pulverized coal production, comprising a vibrating screen body (1), wherein a base frame (2) is fixedly connected to the bottom of the vibrating screen body (1), characterized in that: The bottom of the vibrating screen body (1) is fixedly connected with a vibrating motor (3), the inside of the vibrating screen body (1) is connected with a screen mesh (4) at the top, the inside of the vibrating screen body (1) is fixedly connected with a sundry discharge plate (5) at the front of the screen mesh (4), the inside of the vibrating screen body (1) is fixedly connected with a coal powder discharge plate (6) at the bottom of the sundry discharge plate (5), the top of the vibrating screen body (1) is fixedly connected with a feeding cylinder (7) at the rear, the inside of the feeding cylinder (7) is rotatably connected with a scattering frame (8) at the top, the inside of the feeding cylinder (7) is rotatably connected with two baffles (9) at the bottom of the scattering frame (8), and the inside of the feeding cylinder (7) is fixedly connected with a discharge inclined plate (10) at the bottom of the baffles (9).

2. The high-efficiency screening and impurity removing device for coal powder production according to claim 1, characterized in that: The side of the feeding cylinder (7) is rotatably connected with a main gear (11) at the top, the side of the feeding cylinder (7) is rotatably connected with a sector block (12) at the bottom of the main gear (11), the side of the feeding cylinder (7) is slidably connected with a straight tooth block (13) at the bottom of the sector block (12), the side of the feeding cylinder (7) is symmetrically rotatably connected with two auxiliary gears (14) at the bottom of the straight tooth block (13), the top of the sector block (12) is fixedly connected with a sliding rail (15), the top of the sector block (12) is slidably connected with an arc tooth block (16) through the sliding rail (15), and the top of the sector block (12) is fixedly connected with a stop block (17) at the two ends of the sliding rail (15).

3. The high-efficiency screening and impurity removing device for coal powder production according to claim 2, characterized in that: The two auxiliary gears (14) are in mesh with the bottom of the straight tooth block (13), and the arc tooth block (16) is in mesh with the main gear (11).

4. The high-efficiency screening and impurity removing device for coal powder production according to claim 2, characterized in that: The bottom of the sector block (12) is provided with a transmission gear slot (18), and the transmission gear slot (18) is in mesh with the top of the straight tooth block (13).

5. The high-efficiency screening and impurity removing device for coal powder production according to claim 2, characterized in that: One end of the scattering frame (8) penetrates through the side of the feeding cylinder (7) and is fixedly connected with the side surface of the main gear (11), and one end of the two baffles (9) penetrates through the side of the feeding cylinder (7) and is fixedly connected with the side surface of the two auxiliary gears (14) respectively.

6. The high-efficiency screening and impurity removing device for coal powder production according to claim 1, characterized in that: The other side of the feeding cylinder (7) is rotatably connected with a rotating cover (19), the other side of the feeding cylinder (7) is rotatably connected with a reciprocating gear (20) in the inside of the rotating cover (19), the other side of the feeding cylinder (7) is rotatably connected with a residual gear (23) at the circumcenter position in the inside of the rotating cover (19), a residual gear slot (24) is formed in the inner wall of the rotating cover (19), the reciprocating gear (20) is in mesh with the residual gear (23), the reciprocating gear (20) and the residual gear slot (24) are adaptively matched, the residual gear (23) is fixedly connected with the rotating cover (19), and the reciprocating gear (20) is fixedly connected with the other end of the scattering frame (8).

7. The high-efficiency screening and impurity removing device for coal powder production according to claim 6, characterized in that: The other side of the feeding cylinder (7) is fixedly connected with a fixing frame (21) at the outer surface of the rotating cover (19), the side of the fixing frame (21) is fixedly connected with a motor (22), and the output shaft of the motor (22) penetrates through the side of the fixing frame (21) and is fixedly connected with the rotating cover (19).

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