Novel roller screen for coal conveying system

Abstract

The utility model discloses a novel roller screen for a coal conveying system, which comprises a screen body shell, a plurality of rotating rollers are rotatably mounted in the middle of the inner wall of the screen body shell, a plurality of plum blossom screen pieces are mounted in the middles of the rotating rollers, the bottom of the screen body shell is connected with a bottom support frame, and the bottom support frame is communicated with the inside of the screen body shell. Top bin absorption pipes are installed on the two sides of the inner wall of the screen body shell correspondingly, a first purification mechanism is installed on the side, close to the feeding frame, of the top end of the screen body shell, falling material absorption pipes are installed on the two sides of the inner wall of the bottom supporting frame correspondingly, and a second purification mechanism is installed on the side, away from the discharging frame, of the screen body shell. The bottom of the first purification mechanism and the bottom of the second purification mechanism are each provided with an exhaust pipe, the bottoms of the exhaust pipes are communicated with a three-way branch pipe, and the surface of the top bin absorption pipe and the surface of the falling material absorption pipe are each provided with a plurality of air inlets. And pulverized coal diffusion pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the field of coal block transportation, in particular to a new roller screen for a coal transportation system. Background Art

[0002] In the coal conveying system, the roller screen is a commonly used screening equipment, which is used to classify coal according to particle size to meet the requirements of subsequent processes or equipment for coal quality and particle size. The screen surface of the roller screen is composed of many parallel rollers with screen plates staggered on them. The rollers rotate through sprockets or gears, and their rotation direction is the same as the material flow direction. During the use of the existing roller screen for coal transportation, due to continuous rolling and screening, small pieces of coal slag will stir up dust inside the screen frame, and small pieces of coal slag will fall to the bottom after screening, which will also form dust. These coal dusts spread to the outside air and cause certain environmental pollution. Utility Model Content

[0003] The purpose of the utility model is to provide a new type of roller screen for a coal conveying system to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of roller screen for a coal conveying system, comprising a screen shell, a feed frame is provided on the top of one side of the screen shell, a discharge frame is provided on the bottom of the other side of the screen shell, a plurality of rotating rollers are rotatably installed in the middle of the inner wall of the screen shell, a plurality of plum blossom screens are installed in the middle of the rotating rollers, a bottom support frame is connected to the bottom of the screen shell, and the bottom support frame is communicated with the inside of the screen shell, top bin absorption pipes are installed on both sides of the inner wall of the screen shell, a first purification mechanism is installed on one side of the top of the screen shell close to the feed frame, and falling absorption pipes are installed on both sides of the inner wall of the bottom support frame. A second purification mechanism is installed on the side of the sieve shell away from the discharge frame, and an exhaust pipe is provided at the bottom of the first purification mechanism and the bottom of the second purification mechanism. The bottom of the exhaust pipe is connected with a three-way branch pipe, and the surfaces of the top bin absorption pipe and the blanking absorption pipe are provided with a plurality of air inlets. The first purification mechanism and the second purification mechanism both include an equipment box and a centrifugal fan installed inside the equipment box, and the input end of the centrifugal fan is connected with a rectangular shell, and a filter element is clamped in the middle of the rectangular shell. A plurality of driving mechanisms corresponding to the rotating rollers are provided in the middle of the front side of the sieve shell, and the driving mechanism includes a driving motor and a reducer installed on one side of the driving motor.

[0005] Preferably, a switch panel is installed in the middle of the sieve shell near the second purification mechanism, and the drive motor and the centrifugal fan are electrically connected to the external power supply through the switch panel, and the switch panel facilitates the control of the drive motor and the centrifugal fan.

[0006] Preferably, a plurality of maintenance end covers are provided on the top of the screen shell, a discharge port is provided at the bottom of the discharge frame, the output end of the drive motor is transmission-connected to the input end of the reducer, the output end of the reducer is fixedly connected to one end of the rotating roller, and the drive mechanism is convenient for driving the rotating roller to rotate.

[0007] Preferably, both ends of the three-way branch pipe at the bottom of the first purification mechanism are connected to two top bin absorption pipes on the top of the inner wall of the sieve shell, and both ends of the three-way branch pipe at the bottom of the second purification mechanism are connected to two blanking absorption pipes on the inner wall of the bottom support frame.

[0008] Preferably, the bottom of the centrifugal fan is fixedly connected to the bottom of the inner wall of the equipment box, and one end of the exhaust pipe away from the three-way branch pipe is connected to one side of the rectangular shell.

[0009] Preferably, the top cover of the equipment box is provided with a top cover, and a ventilation groove is provided on one side of the top cover, and the ventilation groove facilitates the exhaust work of the fan.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] During the screening process, the centrifugal fans of the first purification mechanism and the second purification mechanism are started. The centrifugal fan of the first purification mechanism can generate negative pressure when working. The air above the inside of the screen shell and the air above the inside of the bottom support frame will be sucked away through the air inlets on the top bin absorption pipe and the falling material absorption pipe, and enter the rectangular shell through the three-way branch pipe and the exhaust pipe. When passing through the rectangular shell, it is filtered by the filter element, and then the dust formed by the rolling screen inside the screen shell and the dust formed by the falling of coal blocks and coal slag inside the bottom support frame are absorbed and treated, reducing diffusion pollution. The entire rolling screen greatly reduces the diffusion of dust during the screening process, thereby reducing the pollution caused by the diffusion of coal powder to the external air. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front perspective view of the utility model;

[0013] Figure 2 This is a side structural diagram of the screen shell of the utility model;

[0014] Figure 3 This is a structural diagram of the first purification mechanism of the utility model;

[0015] Figure 4 This is a structural diagram of the top bin absorption pipe of the utility model.

[0016] In the figure: 1. sieve shell; 2. feed frame; 3. discharge frame; 4. discharge port; 5. rotating roller; 6. plum blossom sieve; 7. maintenance end cover; 8. bottom support frame; 9. first purification mechanism; 10. top bin absorption pipe; 11. second purification mechanism; 12. drop absorption pipe; 13. exhaust pipe; 14. three-way branch pipe; 15. switch panel; 16. drive mechanism; 17. drive motor; 18. reducer; 19. equipment box; 20. centrifugal fan; 21. rectangular shell; 22. filter element; 23. top cover; 24. ventilation groove; 25. air inlet. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1-4 The utility model provides a new type of roller screen for a coal conveying system, comprising a screen body shell 1, a feed frame 2 is arranged on the top of one side of the screen body shell 1, a discharge frame 3 is arranged on the bottom of the other side of the screen body shell 1, a plurality of rotating rollers 5 are rotatably installed in the middle of the inner wall of the screen body shell 1, a plurality of plum blossom screen pieces 6 are installed in the middle of the rotating rollers 5, a bottom support frame 8 is connected to the bottom of the screen body shell 1, and the bottom support frame 8 is communicated with the inside of the screen body shell 1, top bin absorption pipes 10 are installed on both sides of the inner wall of the screen body shell 1, a first purification mechanism 9 is installed on the side of the top of the screen body shell 1 close to the feed frame 2, a drop absorption pipe 12 is installed on both sides of the inner wall of the bottom support frame 8, and a second purification mechanism 9 is installed on the side of the screen body shell 1 away from the discharge frame 3. Structure 11, the bottom of the first purification mechanism 9 and the bottom of the second purification mechanism 11 are both provided with an exhaust pipe 13, the bottom of the exhaust pipe 13 is connected with a three-way branch pipe 14, the surfaces of the top bin absorption pipe 10 and the falling material absorption pipe 12 are both provided with a plurality of air inlets 25, the first purification mechanism 9 and the second purification mechanism 11 both include an equipment box 19 and a centrifugal fan 20 installed inside the equipment box 19, the input end of the centrifugal fan 20 is connected with a rectangular shell 21, the middle part of the rectangular shell 21 is clamped with a filter element 22, and the middle part of the front side of the sieve body shell 1 is provided with a plurality of driving mechanisms 16 corresponding to the rotating roller 5, the driving mechanism 16 includes a driving motor 17 and a reducer 18 installed on one side of the driving motor 17.

[0019] See also Figure 1-4A switch panel 15 is installed in the middle of the sieve shell 1 near the second purification mechanism 11. The drive motor 17 and the centrifugal fan 20 are electrically connected to the external power supply through the switch panel 15. A plurality of maintenance end covers 7 are provided on the top of the sieve shell 1. A discharge port 4 is provided at the bottom of the discharge frame 3. The output end of the drive motor 17 is transmission-connected to the input end of the reducer 18. The output end of the reducer 18 is fixedly connected to one end of the rotating roller 5.

[0020] In this embodiment, the coal blocks are located above a number of rotating rollers 5. The driving motor 17 of the driving mechanism 16 drives the rotating rollers 5 to rotate through the reducer 18. The rotating rollers 5 can rotate while the plum blossom screen 6 rotates. There are gaps between the rotating rollers 5, so that while the coal blocks are constantly moving above the rotating rollers 5, smaller coal blocks and coal slag will pass through the rotating rollers 5 and fall into the bottom support frame 8. Large coal blocks are continuously rolled and transported to the discharging frame 3 by the rotating rollers 5 and the plum blossom screen 6, and then discharged, completing the rolling screening work.

[0021] See also Figure 1-4 , the two ends of the three-way branch pipe 14 at the bottom of the first purification mechanism 9 are connected to the two top bin absorption pipes 10 at the top of the inner wall of the sieve shell 1, the two ends of the three-way branch pipe 14 at the bottom of the second purification mechanism 11 are connected to the two blanking absorption pipes 12 on the inner wall of the bottom support frame 8, the bottom of the centrifugal fan 20 is fixedly connected to the bottom of the inner wall of the equipment box 19, the end of the exhaust pipe 13 away from the three-way branch pipe 14 is connected to one side of the rectangular shell 21, the top cover of the equipment box 19 is provided with a top cover 23, and a ventilation groove 24 is provided on one side of the top cover 23;

[0022] In this embodiment, the centrifugal fans 20 of the first purification mechanism 9 and the second purification mechanism 11 are started during the screening process, and the air is drawn away through the air inlets 25 on the top bin absorption tube 10 and the falling material absorption tube 12, and enters the rectangular shell 21 after passing through the three-way branch pipe 14 and the exhaust pipe 13. When passing through the rectangular shell 21, it is filtered by the filter element 22, and then the dust formed inside the sieve shell 1 and the bottom support frame 8 is absorbed to reduce diffuse pollution.

[0023] During specific use, the utility model is a new type of roller screen for a coal conveying system. During the use of the entire roller screen, coal blocks are added to the interior of the screen body shell 1 through the feed frame 2, and the coal blocks are above a number of rotating rollers 5. The driving motor 17 of the driving mechanism 16 drives the rotating rollers 5 to rotate through the reducer 18. The rotating rollers 5 can rotate while the plum blossom screen pieces 6 rotate. There are gaps between the rotating rollers 5, so that while the coal blocks are constantly moving above the rotating rollers 5, smaller coal blocks and coal slag will pass through the rotating rollers 5 and fall into the bottom support frame 8. Large pieces of coal blocks are continuously rolled and transported to the discharging frame 3 with the rotating rollers 5 and the plum blossom screen pieces 6, and then discharged, completing the roller screen work. During the screening process, the centrifugal fans 20 of the first purification mechanism 9 and the second purification mechanism 11 are started. The centrifugal fans 20 of the first purification mechanism 9 can generate negative pressure when working, and the air above the interior of the screen body shell 1 It will be sucked away through the air inlet 25 on the top bin absorption pipe 10, and enter the rectangular shell 21 of the first purification mechanism 9 after passing through the three-way branch pipe 14 and the exhaust pipe 13. It will be filtered by the filter core 22 when passing through the rectangular shell 21, and then the dust formed by the rolling screen inside the sieve shell 1 will be absorbed and treated, thereby reducing diffusion pollution. Similarly, the centrifugal fan 20 of the second purification mechanism 11 can generate negative pressure when working. The air above the bottom support frame 8 will be sucked away through the air inlet 25 on the blanking absorption pipe 12, and enter the rectangular shell 21 of the second purification mechanism 11 after passing through the three-way branch pipe 14 and the exhaust pipe 13. It will be filtered by the filter core 22 when passing through the rectangular shell 21, and then the dust formed by the coal blocks and coal slag falling inside the bottom support frame 8 will be absorbed and treated, thereby reducing diffusion pollution. The entire rolling screen greatly reduces the diffusion of dust during the screening process, thereby reducing the pollution caused by the coal powder diffusing into the external air.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A novel roller screen for a coal conveying system, comprising a screen shell (1), characterized in that: A feed frame (2) is provided at the top of one side of the sieve shell (1), and a discharge frame (3) is provided at the bottom of the other side of the sieve shell (1). A plurality of rotating rollers (5) are rotatably mounted in the middle of the inner wall of the sieve shell (1), and a plurality of plum blossom screens (6) are mounted in the middle of the rotating rollers (5). A bottom support frame (8) is connected to the bottom of the sieve shell (1), and the bottom support frame (8) is communicated with the interior of the sieve shell (1). Top bin absorption pipes (10) are mounted on both sides of the inner wall of the sieve shell (1). A first purification mechanism (9) is mounted on the side of the top of the sieve shell (1) close to the feed frame (2), and material drop absorption pipes (12) are mounted on both sides of the inner wall of the bottom support frame (8). A second purification mechanism (11) is mounted on the side of the sieve shell (1) away from the discharge frame (3). The first purification mechanism (9) The bottom of the first purifying mechanism (9) and the bottom of the second purifying mechanism (11) are both provided with an exhaust pipe (13), the bottom of the exhaust pipe (13) is connected to a three-way branch pipe (14), the surfaces of the top bin absorption pipe (10) and the falling material absorption pipe (12) are both provided with a plurality of air inlets (25), the first purifying mechanism (9) and the second purifying mechanism (11) both comprise an equipment box (19) and a centrifugal fan (20) installed inside the equipment box (19), the input end of the centrifugal fan (20) is connected to a rectangular shell (21), the middle of the rectangular shell (21) is clamped with a filter core (22), and the middle of the front side of the sieve shell (1) is provided with a plurality of drive mechanisms (16) corresponding to the rotating rollers (5), the drive mechanisms (16) comprising a drive motor (17) and a reducer (18) installed on one side of the drive motor (17).

2. The novel roller screen for coal conveying system according to claim 1 is characterized in that: A switch panel (15) is installed in the middle of the sieve shell (1) on the side close to the second purification mechanism (11), and the drive motor (17) and the centrifugal fan (20) are both electrically connected to an external power supply through the switch panel (15).

3. The novel roller screen for coal conveying system according to claim 1 is characterized by: A plurality of maintenance end covers (7) are provided at the top of the screen shell (1), and a discharge port (4) is provided at the bottom of the discharge frame (3).

4. The novel roller screen for coal conveying system according to claim 1 is characterized by: The output end of the driving motor (17) is transmission-connected to the input end of the reducer (18), and the output end of the reducer (18) is fixedly connected to one end of the rotating roller (5).

5. The novel roller screen for coal conveying system according to claim 1 is characterized by: The two ends of the three-way branch pipe (14) at the bottom of the first purification mechanism (9) are connected to two top bin absorption pipes (10) at the top of the inner wall of the sieve shell (1), and the two ends of the three-way branch pipe (14) at the bottom of the second purification mechanism (11) are connected to two blanking absorption pipes (12) on the inner wall of the bottom support frame (8).

6. The novel roller screen for coal conveying system according to claim 1 is characterized by: The bottom of the centrifugal fan (20) is fixedly connected to the bottom of the inner wall of the equipment box (19), and one end of the exhaust pipe (13) away from the three-way branch pipe (14) is connected to one side of the rectangular shell (21).

7. The novel roller screen for coal conveying system according to claim 1 is characterized by: The top cover of the equipment box (19) is provided with a top cover (23), and a ventilation groove (24) is provided on one side of the top cover (23).

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