Coal classifying and screening device

Abstract

The utility model discloses a coal grading screening device, include: frame, cylinder frame, cylinder frame rotation is placed in the middle part of frame, the inside of cylinder frame is provided with the support axle for supporting and transmission cylinder frame, support axle is connected with frame rotation, the middle part of cylinder frame is provided with a plurality of separation net, a plurality of separation net's mesh hole increases gradually to the direction of discharge end, the inside of separation net is fixed with helical blade, the utility model has the advantages of: the setting dust cover has effectively reduced the overflow of dust in the coal screening process, and the fan draws the air in the dust cover through the air duct, and the coal dust is drawn into the filter box and is filtered, avoids the pollution of dust to the working environment, and guarantees the health of operating personnel, sets up the filter plate in the filter box, and filters the dust-containing air that draws, the spray pipe of spray part can wash the filter plate, removes the dust and particle on the filter plate through high pressure water, keeps the filtration performance of filter plate.

Description

Technical Field

[0001] This utility model relates to the field of coal screening technology, specifically a coal grading and screening device. Background Technology

[0002] Coal grading and screening refers to the process of classifying coal according to particle size using screening equipment. It is typically a key step in coal processing and washing. Its main purpose is to separate coal of different particle sizes for further processing, transportation, or use. Currently, coal grading and screening often uses vibrating screens. During vibrating screening, the collision, friction, and vibration of coal particles generate a large amount of fine coal dust. This dust disperses into the air, polluting the environment and potentially posing a health hazard to surrounding facilities, equipment, and operators. Utility Model Content

[0003] The purpose of this invention is to provide a coal grading and screening device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a coal grading and screening device, comprising:

[0005] frame;

[0006] A cylindrical frame is rotatably positioned in the middle of the machine frame. The inside of the cylindrical frame is provided with a support shaft for supporting and driving the cylindrical frame. The support shaft is rotatably connected to the machine frame. Multiple separation screens are provided in the middle of the cylindrical frame. The mesh size of the multiple separation screens increases sequentially towards the discharge end. Spiral blades are fixed inside the separation screens.

[0007] A dust cover is placed on top of the frame. An air duct communicating with the dust cover is fixed to the top of the dust cover. A filter box for filtration is fixed to one end of the air duct. A fan for drawing air from inside the dust cover is installed on one side of the filter box. A cleaning spray unit is provided inside the filter box.

[0008] Preferably, the end of the cylinder frame closest to the fan is the feeding end, and the other end of the cylinder frame is the discharging end. Separating nets 1, 2, 3 and 4 are arranged sequentially from the feeding end to the discharging end of the separating net.

[0009] Preferably, the bottom of the frame is provided with discharge ports corresponding to separation net one, separation net two, separation net three, separation net four and the discharge end.

[0010] Preferably, a support rod for supporting the separation net is fixedly connected to the outer side of the support shaft, and a motor is fixedly connected to the end of the frame. The motor is connected to the end of the support shaft through a chain drive assembly.

[0011] Preferably, the side of the frame is provided with an air duct that communicates with the air duct.

[0012] Preferably, a filter plate is fixedly connected inside the filter box, and two drain pipes are fixedly connected to one side of the bottom of the filter box, with a valve installed in the middle of the drain pipe.

[0013] Preferably, the spray unit includes a spray pipe fixed inside the filter box, with the outlet of the spray pipe facing one side of the filter plate, and one end of the spray pipe extending out of the filter box and connected to a water pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The cylinder frame is composed of multiple metal rings and metal connecting rods, and multiple separation nets with progressively larger mesh sizes are set inside. With the help of spiral blades, during the rotation of the cylinder frame, the coal can be gradually separated towards the discharge end according to its volume from small to large, realizing graded screening and meeting the screening requirements of coal of different particle sizes; the dust cover effectively reduces the overflow of dust during the coal screening process. The fan draws air from the dust cover through the air duct and draws the coal dust into the filter box for filtration, avoiding dust pollution to the working environment and protecting the health of operators; the filter box is equipped with filter plates to filter the dusty air drawn in; the spray pipes of the spray section can wash the filter plates, removing dust and particles from the filter plates with high-pressure water, maintaining the filtration performance of the filter plates. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the material outlet structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the motor of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the tube frame of this utility model;

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

[0020] Figure 6 This is a schematic diagram of the separation net structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the spiral blade of this utility model.

[0022] In the diagram: 1. Frame; 2. Discharge port; 3. Cylindrical frame; 4. Support shaft; 5. Separator net one; 6. Spiral blades; 7. Dust cover; 8. Air duct; 9. Air pipe; 10. Fan; 11. Filter box; 12. Filter plate; 13. Spray pipe; 14. Drain pipe; 15. Motor; 16. Chain drive assembly; 17. Separator net two; 18. Separator net three; 19. Separator net four. 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] Please see Figure 1 , 2 As shown in 3, 4, 5, 6, and 7, this utility model provides a technical solution: a coal grading and screening device, comprising: a frame 1; a cylindrical frame 3 rotatably placed in the middle of the frame 1, the cylindrical frame 3 being made of multiple metal rings connected through metal connecting rods, a support shaft 4 for supporting and driving the cylindrical frame 3 being fixedly connected inside the cylindrical frame 3, the support shaft 4 being rotatably connected to the frame 1, multiple separation screens being provided in the middle of the cylindrical frame 3, the mesh size of the multiple separation screens increasing sequentially towards the discharge end, and spiral blades 6 being fixedly connected inside the separation screens; a dust cover 7 being placed on the top of the frame 1, an air duct 8 communicating with the dust cover 7 being fixedly connected to the top of the dust cover 7, a filter box 11 for filtering being fixedly connected to one end of the air duct 8, a fan 10 for extracting air from the inside of the dust cover 7 being installed on one side of the filter box 11, and a spray section for cleaning being provided inside the filter box 11.

[0025] It should be noted that in this embodiment, a guide plate is fixedly connected to one end of the frame 1 and the feed end of the cylinder 3. The coal is conveyed into the cylinder 3 through the guide plate. Under the action of the drive equipment, the support shaft 4 drives the cylinder 3 to rotate. The cylinder 3 drives the coal forward through the internal spiral blades 6. During the conveying process, the coal falls from the gaps in the separation net. As the gaps in the separation net gradually increase along the discharge end of the cylinder 3, the coal is gradually separated from the small to the large at the discharge end. During this period, the blower 10 draws the coal dust caused by the overturning into the filter box 11 through the air duct 8 for filtration. The output end of the blower 10 is equipped with a pipe. One end of the pipe is located at the top of the water tank, so that the blown air can contact the water surface, thereby recovering the dust in the blown air by contacting the water.

[0026] In one embodiment, the end of the cylinder frame 3 closest to the fan 10 is the feed end, and the other end of the cylinder frame 3 is the discharge end. Separating mesh 1 5, separating mesh 2 17, separating mesh 3 18 and separating mesh 4 19 are arranged sequentially from the feed end to the discharge end. The bottom of the frame 1 is provided with discharge port 2 corresponding to separating mesh 1 5, separating mesh 2 17, separating mesh 3 18, separating mesh 4 19 and the discharge end.

[0027] It should be noted that in this embodiment, the separating net is composed of multiple metal rods welded at equal intervals on the outer sides of two adjacent metal rings. The spacing between the metal rods of separating net 1 (5), separating net 2 (17), separating net 3 (18), and separating net 4 (19) gradually increases. This allows the coal to be gradually separated from small volume to large volume by rotating the cylinder frame 3, and then fall into the discharge port 2 below for discharge.

[0028] In one embodiment, a support rod for supporting the separation net is fixed to the outside of the support shaft 4, and a motor 15 is fixed to the end of the frame 1. The motor 15 is connected to the end of the support shaft 4 via a chain drive assembly 16.

[0029] It should be noted that in this embodiment, the outer side of the support shaft 4 is fixed to the metal ring by a metal support rod, thereby supporting the cylinder frame 3 through the support shaft 4, and driving the cylinder frame 3 to rotate through the support shaft 4, thereby driving the separation net to rotate. When driving, the motor 15 drives the support shaft 4 to rotate through the sprocket and chain of the chain transmission assembly 16, and the support shaft 4 drives the separation net to rotate through the cylinder frame 3, which, together with the spiral blades 6, makes the coal conveyed forward and sorted at the same time.

[0030] In one embodiment, the side of the frame 1 is provided with an air duct 9 that communicates with the air duct 8, the filter box 11 is fixedly connected to the inside of the filter plate 12, and two drain pipes 14 are fixedly connected to one side of the bottom of the filter box 11. A valve is installed in the middle of the drain pipe 14. The spray section includes a spray pipe 13 fixedly connected to the inside of the filter box 11. The outlet of the spray pipe 13 faces the side of the filter plate 12, and one end of the spray pipe 13 extends out of the filter box 11 and is connected to a water pipe.

[0031] It should be noted that, in this embodiment, under the action of the fan 10, the air inside the dust cover 7 enters the filter box 11 through the air duct 8 and is filtered by the filter plate 12 inside the filter box 11. The filter plate 12 is a metal plate. When it is necessary to clean the filter plate 12, the fan 10 can be stopped first, and the water valve of the drain pipe 14 can be opened. The high-pressure water pump can be used to spray high-pressure water onto the filter plate 12 to rinse the filter plate 12. The rinsed water and particles are discharged through the drain pipe 14. The water pipe is then connected to a hot air source to dry the filter plate 12 and the inside of the filter box 11 with hot air.

[0032] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[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 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 coal grading and screening device, characterized in that: include: Rack (1); A cylindrical frame (3) is rotatably placed in the middle of the frame (1). The inside of the cylindrical frame (3) is provided with a support shaft (4) for supporting and driving the cylindrical frame (3). The support shaft (4) is rotatably connected to the frame (1). Multiple separation nets are provided in the middle of the cylindrical frame (3). The mesh size of the multiple separation nets increases sequentially towards the discharge end. Spiral blades (6) are fixed inside the separation nets. A dust cover (7) is placed on top of the frame (1). A duct (8) communicating with the dust cover (7) is fixedly connected to the top of the dust cover (7). A filter box (11) for filtration is fixedly connected to one end of the duct (8). A fan (10) for drawing air from inside the dust cover (7) is installed on one side of the filter box (11). A spray section for cleaning is provided inside the filter box (11).

2. The coal grading and screening device according to claim 1, characterized in that: The end of the cylindrical frame (3) near the fan (10) is the feeding end, and the other end of the cylindrical frame (3) is the discharging end. Separating nets 1 (5), 2 (17), 3 (18) and 4 (19) are arranged sequentially from the feeding end to the discharging end of the separating net.

3. The coal grading and screening device according to claim 2, characterized in that: The bottom of the frame (1) is provided with discharge ports (2) corresponding to the first separation net (5), the second separation net (17), the third separation net (18), the fourth separation net (19) and the discharge end.

4. The coal grading and screening device according to claim 1, characterized in that: A support rod for supporting the separation net is fixed to the outside of the support shaft (4), and a motor (15) is fixed to the end of the frame (1). The motor (15) is connected to the end of the support shaft (4) through a chain drive assembly (16).

5. A coal grading and screening device according to claim 1, characterized in that: The side of the frame (1) is provided with an air duct (9) that communicates with the air duct (8).

6. A coal grading and screening device according to claim 1, characterized in that: A filter plate (12) is fixedly connected inside the filter box (11), and two drain pipes (14) are fixedly connected to one side of the bottom of the filter box (11), with a valve installed in the middle of the drain pipes (14).

7. A coal grading and screening device according to claim 6, characterized in that: The spray section includes a spray pipe (13) fixed inside the filter box (11), with the outlet of the spray pipe (13) facing the filter plate (12), and one end of the spray pipe (13) extending out of the filter box (11) and connected to a water pipe.

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