Screening device for pulverized coal production

Abstract

The utility model discloses a screening device for pulverized coal production, which relates to the technical field of screening devices, solves the technical problem of blocking prevention, and comprises a box body, a feeding hole is formed in the top of the box body, a conveying belt is rotatably mounted on the inner bottom wall of the box body, and a screening component is arranged in the box body; the screening assembly comprises a first filter plate rotationally installed on the inner wall of the box body, a second filter plate is slidably installed in the first filter plate, an electric telescopic rod is fixedly installed at the other end of the first filter plate, protection plates are fixedly installed on the two sides of the first filter plate, and kidney-shaped through holes are formed in the protection plates. A third filter plate is obliquely mounted on the inner wall of the box body, and sliding grooves are formed in the inner walls of the two sides of the box body; and anti-blocking multi-stage filtering operation is carried out while the filtering fineness is adjusted, so that the anti-blocking capacity of the device is improved, and the screening working efficiency of the device is improved.

Description

Technical Field

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

[0002] Powdered coal is a coal product made from washed coal, coking coal, etc., through screening, drying, and grinding. It is mainly used in the molding of wet sand in blast furnace smelting and casting. Powdered coal is added to the wet sand for cast iron. In the production of powdered coal, screening devices are needed to screen the raw materials.

[0003] While existing screening devices can adjust the filtration fineness, they are not convenient for performing multi-stage filtration to prevent clogging while adjusting the filtration fineness, nor are they convenient for vibration-based anti-clogging filtration. This affects the device's filtration capacity, anti-clogging ability, and screening efficiency. Therefore, based on the shortcomings of the technology, we propose a screening device for coal powder production that can solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a screening device for pulverized coal production, and to solve the following technical problems:

[0005] It is inconvenient to perform multi-stage filtration to prevent clogging while adjusting the filtration fineness, and it is also inconvenient to perform vibration-based anti-clogging filtration, which affects the filtration capacity, the anti-clogging ability, and the screening efficiency of the device.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A screening device for pulverized coal production includes a box body, a feed inlet at the top of the box body, a conveyor belt rotatably mounted on the inner bottom wall of the box body, and a screening assembly inside the box body.

[0008] The screening assembly includes a first filter plate rotatably mounted on the inner wall of the chamber, a second filter plate slidably mounted inside the first filter plate, an electric telescopic rod fixedly mounted on the other end of the first filter plate, protective plates fixedly mounted on both sides of the first filter plate, and waist-shaped through holes opened on the protective plates. A third filter plate is obliquely mounted on the inner wall of the chamber, and sliding grooves are opened on the inner walls of both sides of the chamber. A slider with a spring is slidably mounted in the sliding groove, and a limit post is fixedly mounted on the side of the slider near the protective plate.

[0009] As a further embodiment of this utility model: the limiting post is slidably installed through the waist-shaped through hole, the end of the spring away from the slider is fixedly installed on the inner bottom wall of the slide groove, and the other end of the electric telescopic rod is fixedly installed on the second filter plate.

[0010] As a further embodiment of this utility model: a guide rod is slidably mounted on the slider, the two ends of the guide rod are fixedly mounted on the inner wall of the groove, and the spring is nested on the outer surface of the guide rod.

[0011] As a further embodiment of this utility model: a grinding assembly is provided on the housing, the grinding assembly includes a grinding plate fixedly installed on the inner wall of the housing, a grinding roller is rotatably installed on the grinding plate, and the grinding plate and the third filter plate are fixedly connected together.

[0012] As a further embodiment of this utility model: a moving groove is provided on the inner wall of both sides of the box, a reciprocating block is slidably installed in the moving groove, a balance bar is fixedly installed in one of the moving grooves, a reciprocating lead screw is rotatably installed in the other moving groove, and a motor is fixedly installed on the side of the box near the conveyor belt.

[0013] As a further embodiment of this utility model: an electric telescopic scraper is fixedly installed between the two reciprocating blocks, and a cleaning brush is fixedly installed on the side of the electric telescopic scraper near the grinding roller, and the grinding roller is rotatably installed between the two reciprocating blocks.

[0014] As a further embodiment of this utility model: the balance bar is slidably mounted on one of the reciprocating blocks, the reciprocating screw is threadedly mounted on the other reciprocating block, the output end of the motor is slidably mounted through the moving groove and fixedly mounted on the reciprocating screw, and the grinding roller is rotatably mounted near the first filter plate.

[0015] The beneficial effects of this utility model are:

[0016] (1) The spring in the screening assembly, together with the first filter plate and the second filter plate, plays the role of shaking and preventing clogging during the screening and filtration process. While adjusting the filtration fineness, it performs multi-stage filtration operation to prevent clogging, which is convenient for vibration and anti-clogging filtration operation, which is beneficial to improving the filtration capacity of the device, improving the anti-clogging capacity of the device, and improving the screening efficiency of the device.

[0017] (2) The grinding rollers in the grinding assembly are combined with the grinding plates, which facilitates grinding operations during the screening process, improves the grinding capacity of the device, further enhances the screening capacity of the device, and improves the screening efficiency of the device. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of a screening device for pulverized coal production according to this utility model;

[0020] Figure 2This is a schematic diagram of the internal structure of a screening device for pulverized coal production according to this utility model;

[0021] Figure 3 yes Figure 2 Enlarged structural diagram at point A;

[0022] Figure 4 This is a top view schematic diagram of a screening device for pulverized coal production according to this utility model;

[0023] Figure 5 yes Figure 4 Enlarged structural diagram at point B;

[0024] Figure 6 yes Figure 4 Enlarged structural diagram at point C;

[0025] Figure 7 This is a side view of a screening device for coal powder production according to this utility model.

[0026] In the diagram: 1. Box body; 2. Conveyor belt; 3. Feed inlet; 4. Screening assembly; 41. First filter plate; 42. Second filter plate; 43. Electric telescopic rod; 44. Third filter plate; 45. Slide chute; 46. Guide rod; 47. Spring; 48. Slider; 49. Protective plate; 410. Waist-shaped through hole; 411. Limiting post; 5. Grinding assembly; 51. Moving groove; 52. Balance bar; 53. Reciprocating screw; 54. Grinding roller; 55. Electric telescopic scraper; 56. Cleaning brush; 57. Reciprocating block; 58. Grinding plate; 59. Motor. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figures 1-7 As shown, this utility model is a screening device for coal powder production, including a box body 1, a feed inlet 3 on the top of the box body 1, a conveyor belt 2 rotatably installed on the inner bottom wall of the box body 1, the conveyor belt 2 facilitates the transportation of the screened coal powder out of the box body 1, and a screening component 4 is provided inside the box body 1.

[0030] The screening assembly 4 includes a first filter plate 41 rotatably mounted on the inner wall of the housing 1. A second filter plate 42 is slidably mounted inside the first filter plate 41, facilitating the alternating control of the screening particle size of the first filter plate 41 and the adjustment of the screening fineness of the device. An electric telescopic rod 43 is fixedly mounted on the other end of the first filter plate 41, which facilitates the sliding adjustment of the second filter plate 42 within the first filter plate 41. Protective plates 49 are fixedly mounted on both sides of the first filter plate 41, serving to protect against coal dust. The protective plates 49 have oblong through holes 410. A third filter plate 44 is obliquely mounted on the inner wall of the housing 1, serving as a secondary filter for coal dust. Sliding grooves 45 are provided on the inner walls of both sides of the housing 1, and sliders 48 with springs 47 are slidably mounted within the sliding grooves 45. The springs 47 serve to elastically reset the sliders 48, causing the sliders 48 to move the protective plates 48 through the limiting post 411. The elastic reset mechanism 9 elastically drives the first filter plate 41 to vibrate, thus preventing clogging. A limit post 411 is fixedly installed on the side of the slider 48 closest to the protective plate 49. The limit post 411 slides through a waist-shaped through hole 410, driving the protective plate 49 to move. One end of the spring 47 away from the slider 48 is fixedly mounted on the inner bottom wall of the chute 45, and the other end of the electric telescopic rod 43 is fixedly mounted on the second filter plate 42. A guide rod 46 slides through the slider 48, guiding and stabilizing it. Both ends of the guide rod 46 are fixedly mounted on the inner wall of the chute 45, and the spring 47 is nested on the outer surface of the guide rod 46. During the screening and filtration process, this mechanism vibrates to prevent clogging, allowing for multi-stage filtration operations while adjusting the filtration fineness. This facilitates vibration-based anti-clogging filtration, improving the device's filtration capacity, anti-clogging ability, and screening efficiency.

[0031] Example 2

[0032] Please see Figures 6-7As shown, based on Embodiment 1, a grinding assembly 5 is provided on the housing 1. The grinding assembly 5 includes a grinding plate 58 fixedly installed on the inner wall of the housing 1. A grinding roller 54 is rotatably installed on the grinding plate 58. The grinding roller 54 grinds the large particles screened on the first filter plate 41 on the grinding plate 58, performing a grinding process. The grinding plate 58 and the third filter plate 44 are fixedly connected together to facilitate the filtration and screening of the ground large particles of coal powder. Movable grooves 51 are provided on the inner walls of both sides of the housing 1. A reciprocating block 57 is slidably installed in the movable groove 51. A balance rod 52 is fixedly installed in one movable groove 51, and a reciprocating screw 53 is rotatably installed in the other movable groove 51. The reciprocating screw 53 drives the grinding roller 54 to slide within the grinding plate 58 through the reciprocating block 57. A motor 59 is fixedly installed on the side of the housing 1 near the conveyor belt 2. The output end of 59 slides through the moving groove 51 and is fixedly installed on the reciprocating screw 53. An electric telescopic scraper 55 is fixedly installed between the two reciprocating blocks 57. The electric telescopic scraper 55 facilitates scraping and feeding the coal powder on the grinding plate 58. A cleaning brush 56 is fixedly installed on the side of the electric telescopic scraper 55 near the grinding roller 54. The cleaning brush 56 plays the role of cleaning the grinding roller 54. The grinding roller 54 is rotatably installed between the two reciprocating blocks 57. The balance bar 52 slides through and is installed on one of the reciprocating blocks 57. The reciprocating screw 53 is threaded through and installed on the other reciprocating block 57. The grinding roller 54 is rotatably installed near the first filter plate 41, which facilitates grinding operations during the screening process, which is beneficial to improving the grinding capacity of the device, further improving the screening capacity of the device, and improving the screening efficiency of the device.

[0033] The working principle of this utility model is as follows: When using the device, firstly, the electric telescopic rod 43 is activated, causing the electric telescopic rod 43 to drive the second filter plate 42 to slide within the first filter plate 41. After adjusting the filtration fineness, coal powder is poured into the box 1 through the feed inlet 3, causing the coal powder to fall onto the first filter plate 41 for filtration. Larger particles fall onto the grinding plate 58. Simultaneously, the impact force of the coal powder causes the limiting post 411 in the motor 59 to slide within the oblong through hole 410 and drive the slider 48 to slide within the groove 45. At the same time, the slider 48 slides on the guide rod 46, compressing the spring 47. This compresses the spring 47, causing the spring 47 to elastically reset the first filter plate 41, thus preventing the first filter plate 41 from clogging. Then, start the motor 59, so that the output end of the motor 59 drives the reciprocating screw 53 to rotate in the moving groove 51. At the same time, the reciprocating screw 53 drives one of the reciprocating blocks 57 to slide in the moving groove 51. Simultaneously, one of the reciprocating blocks 57 drives the grinding roller 54 to rotate on the grinding plate 58 to crush large coal powder particles. At the same time, the grinding roller 54 drives another reciprocating block 57 to slide on the balance bar 52. Simultaneously, the cleaning brush 56 cleans the grinding roller 54. Then, start the electric telescopic scraper 55, so that the electric telescopic scraper 55 moves to the grinding plate 58. Simultaneously, the electric telescopic scraper 55, driven by the reciprocating block 57, descends and scrapes the crushed coal powder to the third filter plate 44 for secondary filtration. The conveyor belt 2 transports the filtered coal powder out of the box 1 for collection.

[0034] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A screening device for coal dust production, comprising a box (1), characterized in that: The top of the box (1) is provided with a feeding port (3), and the inner bottom wall of the box (1) is rotatably provided with a conveying belt (2); a screening assembly (4) is arranged in the box (1). The screening assembly (4) comprises a first filter plate (41) rotatably arranged on the inner wall of the box (1), a second filter plate (42) slidably arranged in the first filter plate (41), an electric telescopic rod (43) fixedly arranged at the other end of the first filter plate (41), a protection plate (49) fixedly arranged on the two sides of the first filter plate (41), a waist-shaped through hole (410) formed in the protection plate (49), a third filter plate (44) obliquely arranged on the inner wall of the box (1), a sliding groove (45) formed in the inner wall of the box (1) on the two sides, a sliding block (48) with a spring (47) slidably arranged in the sliding groove (45), and a limiting column (411) fixedly arranged on the side of the sliding block (48) close to the protection plate (49).

2. The screening device for coal dust production according to claim 1, characterized in that: The limiting column (411) is slidably arranged in the waist-shaped through hole (410), one end of the spring (47) away from the sliding block (48) is fixedly arranged on the inner bottom wall of the sliding groove (45), and the other end of the electric telescopic rod (43) is fixedly arranged on the second filter plate (42).

3. The screening device for coal dust production according to claim 2, characterized in that: A guide rod (46) is slidably arranged on the sliding block (48), and the two ends of the guide rod (46) are fixedly arranged on the inner wall of the sliding groove (45); and the spring (47) is nestedly arranged on the outer surface of the guide rod (46).

4. The screening device for coal dust production according to claim 1, characterized in that: A grinding assembly (5) is arranged on the box (1), the grinding assembly (5) comprises a grinding plate (58) fixedly arranged on the inner wall of the box (1), and a grinding roller (54) rotatably arranged on the grinding plate (58); and the grinding plate (58) and the third filter plate (44) are fixedly connected together.

5. The screening device for coal dust production according to claim 4, characterized in that: Inner walls on the two sides of the box (1) are each provided with a moving groove (51), a reciprocating block (57) is slidably arranged in the moving groove (51), a balance rod (52) is fixedly arranged in one of the moving grooves (51), a reciprocating screw rod (53) is rotatably arranged in the other moving groove (51), and a motor (59) is fixedly arranged on the side of the box (1) close to the conveying belt (2).

6. The screening device for coal dust production according to claim 5, characterized in that: An electric telescopic scraper (55) is fixedly arranged between the two reciprocating blocks (57), a cleaning brush (56) is fixedly arranged on the side of the electric telescopic scraper (55) close to the grinding roller (54), and the grinding roller (54) is rotatably arranged between the two reciprocating blocks (57).

7. The screening device for coal dust production according to claim 6, characterized in that: The balance rod (52) is slidably arranged in one of the reciprocating blocks (57), the reciprocating screw rod (53) is threadedly arranged in the other reciprocating block (57), the output end of the motor (59) is slidably arranged in the moving groove (51) and fixedly arranged on the reciprocating screw rod (53), and the grinding roller (54) is rotatably arranged at a position close to the first filter plate (41).

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