A coal gangue powder screening device

Abstract

This utility model discloses a coal gangue powder screening device, which includes a shell, a second guide pipe fixedly connected to the left end of the shell, a main shaft inside the second guide pipe, a screw feeder and a fixed blade fixedly connected to the outer wall of the main shaft, a cylindrical screen outside the fixed blade, a primary inclined screen and a secondary inclined screen below the shell, and a frame correspondingly arranged around the shell. Through the above structure, the synergistic action of the cylindrical screen and the fixed blade on the main shaft can quickly achieve preliminary classification of large-diameter powder and small-diameter powder. Subsequently, the staggered combination and height difference design of the primary and secondary inclined screens significantly improves screening accuracy and capacity. The automatic feeding and anti-clogging design, and the composite motion mode of the screw feeder and the fixed blade, can both uniformly transport materials and break up soft lumps in the materials through centrifugal force, avoiding clogging of the cylindrical screen.

Description

Technical Field

[0001] This utility model relates to the field of particle screening technology, and in particular to a particle screening device for coal gangue. Background Technology

[0002] In the process of processing coal gangue into industrial powder, the screening process is a key step in achieving particle size classification and improving product quality. However, existing coal gangue industrial powder screening devices generally suffer from the following technical bottlenecks.

[0003] Insufficient screening efficiency and accuracy: Traditional screening equipment mostly uses single-layer vibrating screens or static screen structures, relying on gravity settling for preliminary classification. These devices have low interception efficiency for large-diameter powders, and small-diameter powders are prone to agglomeration and remain in the coarse powder, resulting in insufficient classification accuracy. Furthermore, single-stage screening cannot meet the simultaneous demands of industrial production for multi-size products (such as coarse, medium, and fine powders), limiting capacity expansion.

[0004] Coal gangue powder often contains soft lumps or sticky impurities. Traditional screw feeders can only achieve unidirectional conveying and cannot effectively disperse materials. Fixed screens are prone to blockage due to particle embedding or agglomeration during high-load operation, which seriously affects the continuity of the production line. Utility Model Content

[0005] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a coal gangue powder screening device that can efficiently screen and process in multiple stages. The staggered combination and height difference design of the first-stage and second-stage inclined screens form a three-stage screening system. Centrifugal force breaks up soft lumps in the material and avoids clogging of the cylindrical screen.

[0006] This utility model also provides a coal gangue powder screening device, comprising a shell, a second guide pipe fixedly connected to the left end of the shell, a feed hopper fixedly connected to the upper end of the second guide pipe, a main shaft arranged inside the second guide pipe, a screw feeder and a fixed blade fixedly connected to the outer wall of the main shaft, a cylindrical screen arranged outside the fixed blade, a first guide pipe fixedly connected to the right end of the shell, a coarse powder hopper fixedly connected to the lower end of the first guide pipe, a fine powder inlet fixedly connected to the lower end of the shell, a fixed plate fixedly connected to the outer wall of the fine powder inlet, a primary inclined screen and a secondary inclined screen arranged below the shell, a frame correspondingly arranged around the shell, and a receiving trough fixedly connected to the outer wall of the frame.

[0007] According to the present invention, a coal gangue powder screening device is provided, wherein a cover plate is fixedly connected to the outer wall of the shell.

[0008] According to the present invention, a coal gangue powder screening device is provided at the left end of the main shaft, the output end of the motor is fixedly connected to the main shaft, the outer wall of the motor is fixedly connected to the side wall of the second guide pipe, and the outer wall of the main shaft is rotatably connected to the inner wall of the first guide pipe.

[0009] According to the present invention, a coal gangue powder screening device is provided, wherein the two ends of the cylindrical screen are fixedly connected to the inner wall of the shell.

[0010] According to the present invention, in a coal gangue powder screening device, the top of the primary inclined screen is fixedly connected to the outer wall of the fixed plate.

[0011] According to the present invention, a coal gangue powder screening device is provided, wherein a first baffle is fixedly connected to the upper end of the first-stage inclined screen, and the top end of the first baffle is fixedly connected to the outer wall of the fixed plate.

[0012] According to the present invention, a coal gangue powder screening device is provided, wherein a second baffle is fixedly connected to the upper end of the secondary inclined screen, and the top end of the second baffle is fixedly connected to the outer wall of the fixed plate.

[0013] According to the present invention, a coal gangue powder screening device is provided, wherein a first support plate is fixedly connected to the lower end of the first-stage inclined screen, and a second support plate is fixedly connected to the lower end of the second-stage inclined screen.

[0014] Beneficial effects:

[0015] 1. High-efficiency screening and multi-stage processing: Through the synergistic effect of the cylindrical screen and the fixed blades on the main shaft, combined with the dispersion effect of the centrifugal force field on the material, the initial classification of large-diameter powder and small-diameter powder can be quickly achieved. Subsequently, through the staggered combination of the first-stage and second-stage inclined screens and the height difference design, a three-stage screening system is formed, which accurately separates three different particle sizes of powder, significantly improving screening accuracy and production capacity.

[0016] 2. Automatic feeding and anti-clogging design: The combined motion mode of the screw feeder and fixed blades can not only convey materials evenly, but also break up soft lumps in the materials through centrifugal force, thus avoiding clogging of the cylindrical screen. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a perspective view of a coal gangue powder screening device according to the present invention;

[0019] Figure 2 This is a structural diagram of a coal gangue powder screening device according to the present invention;

[0020] Figure 3This is a top view of a coal gangue powder screening device according to the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of a cylindrical screen in a coal gangue powder screening device according to the present invention;

[0022] Figure 5 This is a schematic diagram of the internal structure of the cylindrical screen of a coal gangue powder screening device according to the present invention;

[0023] Figure 6 This is a schematic diagram of the main shaft of a coal gangue powder screening device according to the present invention.

[0024] Legend:

[0025] 1. Feed hopper; 2. Motor; 3. Housing; 4. Cover plate; 5. Coarse powder hopper; 6. Frame; 7. Fixing plate; 8. Primary inclined screen; 9. Secondary inclined screen; 10. Receiving trough; 11. First baffle; 12. Second baffle; 13. First support plate; 14. Second support plate; 15. Screw feeder; 16. Fine powder inlet; 17. Fixed blade; 18. Main shaft; 19. Cylindrical screen; 20. First guide pipe; 21. Second guide pipe. Detailed Implementation

[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0027] Reference Figure 1-6 This utility model provides a coal gangue powder screening device, which includes a shell 3. A second guide pipe 21 is fixedly connected to the left end of the shell 3. A feed hopper 1 is fixedly connected to the upper end of the second guide pipe 21. A main shaft 18 is arranged inside the second guide pipe 21. A screw feeder 15 and a fixed blade 17 are fixedly connected to the outer wall of the main shaft 18. A cylindrical screen 19 is arranged outside the fixed blade 17. A first guide pipe 20 is fixedly connected to the right end of the shell 3. A coarse powder hopper 5 is fixedly connected to the lower end of the first guide pipe 20. A fine powder inlet 16 is fixedly connected to the lower end of the shell 3. A fixed plate 7 is fixedly connected to the outer wall of the fine powder inlet 16. A primary inclined screen 8 and a secondary inclined screen 9 are arranged below the shell 3. A frame 6 is arranged around the shell 3. A receiving trough 10 is fixedly connected to the outer wall of the frame 6.

[0028] Specifically, the main shaft 18 drives the screw feeder 15 and the fixed blade 17 to rotate. The screw feeder 15 is used for automatic feeding, and the fixed blade 17 is used to pick up the powder and centrifugally throw it out.

[0029] A cover plate 4 is fixedly connected to the outer wall of the shell 3.

[0030] Specifically, after the cover plate 4 is removed, the internal condition of the housing 3 can be inspected, which facilitates equipment maintenance.

[0031] A motor 2 is provided at the left end of the main shaft 18. The output end of the motor 2 is fixedly connected to the main shaft 18. The outer wall of the motor 2 is fixedly connected to the side wall of the second guide tube 21. The outer wall of the main shaft 18 is rotatably connected to the inner wall of the first guide tube 20.

[0032] Specifically, motor 2 drives the main shaft 18 to rotate.

[0033] The cylindrical screen 19 is fixedly connected to the inner wall of the shell 3 at both ends.

[0034] Specifically, the cylindrical screen 19 is fixed to the inner wall of the shell 3 to enhance vibration resistance.

[0035] The top of the first-stage inclined screen 8 is fixedly connected to the outer wall of the fixed plate 7.

[0036] Specifically, the fixing plate 7 is used to fix the primary inclined screen 8.

[0037] The first baffle 11 is fixedly connected to the upper end of the first-stage inclined screen 8, and the top of the first baffle 11 is fixedly connected to the outer wall of the fixed plate 7.

[0038] Specifically, the first baffle 11 is fixed on the first-stage inclined screen 8 to prevent powder from flowing out from the side, and the fixing plate 7 is used to fix the first baffle 11.

[0039] The upper end of the secondary inclined screen 9 is fixedly connected to a second baffle 12, and the top of the second baffle 12 is fixedly connected to the outer wall of the fixed plate 7.

[0040] Specifically, the second baffle 12 is fixed on the secondary inclined screen 9 to prevent powder from flowing out from the side.

[0041] The lower end of the first-stage inclined screen 8 is fixedly connected to a first support plate 13, and the lower end of the second-stage inclined screen 9 is fixedly connected to a second support plate 14.

[0042] Specifically, the first support plate 13 ensures the stable operation of the primary inclined screen 8, and the second support plate 14 ensures the stable operation of the secondary inclined screen 9.

[0043] Working principle: Powder is fed into the second guide pipe 21 from the feed hopper 1. The screw feeder 15 rotates under the drive of the main shaft 18, and the material is evenly fed into the inside of the cylindrical screen 19. The main shaft 18 drives the fixed blade 17 to rotate at high speed. The fixed blade 17 picks up the powder and forms a centrifugal motion. The centrifugal force causes large-diameter powder to be thrown to the outside of the cylindrical screen 19. After being intercepted by the cylindrical screen 19, it is transferred to the first guide pipe 20 and finally discharged through the coarse powder hopper 5. Small-diameter powder passes through the cylindrical screen 19 and enters the fine powder inlet 16. The small-diameter powder falls from the fine powder inlet 16 to the first-stage inclined screen 8 and the second-stage inclined screen 9. The two screens are arranged in a staggered combination, and multi-stage screening is formed by utilizing the height difference.

[0044] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A coal gangue industrial powder screening device comprising a shell (3), characterized in that: The left end of the housing (3) is fixedly connected to a second guide pipe (21), the upper end of the second guide pipe (21) is fixedly connected to a feed hopper (1), the inside of the second guide pipe (21) is provided with a main shaft (18), the outer wall of the main shaft (18) is fixedly connected to a screw feeder (15) and a fixed blade (17), the outside of the fixed blade (17) is provided with a cylindrical screen (19), the right end of the housing (3) is fixedly connected to a first guide pipe (20), the lower end of the first guide pipe (20) is fixedly connected to a coarse powder hopper (5), the lower end of the housing (3) is fixedly connected to a fine powder inlet (16), the outer wall of the fine powder inlet (16) is fixedly connected to a fixed plate (7), a first-stage inclined screen (8) and a second-stage inclined screen (9) are provided below the housing (3), and a frame (6) is correspondingly provided around the housing (3), the outer wall of the frame (6) is fixedly connected to a receiving trough (10).

2. The coal gangue industrial powder screening device according to claim 1, characterized in that, The outer wall of the housing (3) is fixedly connected to a cover plate (4).

3. The coal gangue powder screening device according to claim 1, characterized in that, A motor (2) is provided at the left end of the main shaft (18). The output end of the motor (2) is fixedly connected to the main shaft (18). The outer wall of the motor (2) is fixedly connected to the side wall of the second guide tube (21). The outer wall of the main shaft (18) is rotatably connected to the inner wall of the first guide tube (20).

4. The coal gangue powder screening device according to claim 1, characterized in that, The cylindrical screen (19) is fixedly connected to the inner wall of the shell (3) at both ends.

5. A coal gangue powder screening device according to claim 1, characterized in that, The top of the first-stage inclined screen (8) is fixedly connected to the outer wall of the fixed plate (7).

6. The coal gangue industrial powder screening device according to claim 1, characterized in that, The first-stage inclined screen (8) is fixedly connected to the upper end of a first baffle (11), and the top of the first baffle (11) is fixedly connected to the outer wall of the fixed plate (7).

7. The coal gangue powder screening device according to claim 1, characterized in that, The upper end of the secondary inclined screen (9) is fixedly connected to a second baffle (12), and the top end of the second baffle (12) is fixedly connected to the outer wall of the fixed plate (7).

8. The coal gangue industrial powder screening device according to claim 1, characterized in that, The lower end of the first-stage inclined screen (8) is fixedly connected to a first support plate (13), and the lower end of the second-stage inclined screen (9) is fixedly connected to a second support plate (14).

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