Fine crushing device for coal processing

Abstract

The utility model discloses a fine crushing device for coal processing, which comprises a frame, a feed port and a discharge port, the feed port and the discharge port are arranged at the top end and the bottom end of the frame, two rotatable crushing rollers are connected in the frame and are distributed in a staggered manner, and a plurality of crushing grooves and a plurality of crushing bulges are arranged on the surfaces of the crushing rollers. A crushing area is formed by the crushing protrusions and the crushing grooves of the other crushing roller, the rack is connected with a scraping plate used for scraping materials on the surfaces of the two crushing rollers, and the rack is connected with a driving mechanism used for driving the two crushing rollers to rotate. Local high stress can be generated when materials are extruded by the edge of the crushing groove, the materials can be promoted to be broken, fine materials can be obtained, the machining quality is improved, a traditional smooth crushing roller design is replaced, meanwhile, residual materials on the crushing roller can be scraped by the scraping plate, the crushing roller is cleaned, the situation that the crushing efficiency is affected due to material accumulation is avoided, and the service life of the crushing roller is prolonged. The practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of coal processing technology, specifically to a fine crushing device for coal processing. Background Technology

[0002] Coal, hailed as "black gold" and the "food of industry," has been one of the world's primary energy sources since the 18th century, an indispensable part of production and daily life. After mining, coal requires crushing and processing to achieve the appropriate particle size for use.

[0003] In the crushing process, two crushing rollers are used to crush the coal. Existing crushing rollers typically have a smooth surface. For example, the patent publication number CN215277527U, entitled "A Coal Crushing Device," mentions that "a gap is left between the two crushing rollers 5 for coal to pass through. As the crushing rollers 5 rotate, the coal is crushed." The accompanying drawings in the specification also show that the crushing rollers have a smooth surface. This results in poor material "biting" ability, relying mainly on compression and friction for crushing. However, coal with a certain degree of moisture easily adheres to the roller surface, reducing crushing efficiency and requiring frequent cleaning, thus affecting crushing efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a fine crushing device for coal processing. When the crushing trough is used to compress the material, local high stress is generated at the edge, which promotes the material to break and can obtain fine material, thus improving the processing quality. This solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fine crushing device for coal processing, comprising a frame and an inlet and an outlet disposed at the top and bottom of the frame, wherein two rotatable crushing rollers are connected inside the frame, the two crushing rollers are staggered, and the surface of the crushing rollers is provided with multiple crushing grooves and multiple crushing protrusions, the crushing protrusions and the crushing grooves of the other crushing rollers forming a crushing zone, the frame is connected to a scraper for scraping off the material on the surface of the two crushing rollers, and the frame is connected to a drive mechanism for driving the two crushing rollers to rotate.

[0006] Preferably, the scraper has multiple protruding ends and multiple scraping grooves at its end, the scraping grooves matching the crushing protrusions and the protruding ends matching the crushing grooves.

[0007] Preferably, the scraper has an L-shaped structure and is provided with multiple mounting holes, the mounting holes are connected to bolts, and the bolts are threadedly connected to the frame.

[0008] Preferably, there are four scrapers in total, with each crushing roller corresponding to two scrapers, and the two scrapers are distributed vertically.

[0009] Preferably, the drive mechanism includes a motor, a belt, a drive wheel, a first rotating shaft, a drive tooth, a driven tooth, and a second rotating shaft. The output end of the motor is connected to the drive wheel via the belt. The two ends of the first rotating shaft are connected to the drive wheel and the drive tooth, and the first rotating shaft is fixedly connected to the crushing roller. The drive tooth is used to drive the driven tooth to rotate. The driven tooth is connected to the end of the second rotating shaft. The second rotating shaft is fixedly connected to another crushing roller.

[0010] Preferably, the driving tooth meshes with the driven tooth, and the diameter of the driving tooth is smaller than the diameter of the driven tooth.

[0011] Preferably, two bearing seats are connected to both sides of the frame, and the first rotating shaft and the second rotating shaft are rotatably connected to the bearing seats.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model has two crushing rollers and four scrapers. During operation, the two crushing rollers can fully crush the material. The edge of the crushing groove will generate local high stress when squeezing the material, which will promote the material to break and obtain fine material, improve the processing quality, and replace the traditional smooth crushing roller design. At the same time, the scrapers can scrape off the residual material on the crushing rollers, realize the cleaning of the crushing rollers, avoid the accumulation of material and affect the crushing efficiency, and have strong practicality. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the frame of this utility model;

[0015] Figure 3 This is a schematic diagram of the scraper structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the crushing zone structure of this utility model.

[0017] In the diagram: 1. Frame; 2. Bearing housing; 3. Rotating shaft one; 4. Drive wheel; 5. Crushing roller; 6. Scraper; 7. Feed inlet; 8. Drive gear; 9. Driven gear; 10. Crushing trough; 11. Protruding end; 12. Scraping trough; 13. Rotating shaft two; 14. Crushing zone; 15. Mounting hole; 16. Crushing protrusion. Detailed Implementation

[0018] 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.

[0019] Please see Figures 1 to 4 This utility model provides a fine crushing device for coal processing, including a frame 1 and an inlet 7 and an outlet 7 disposed at the top and bottom of the frame 1. Two rotatable crushing rollers 5 are connected inside the frame 1, staggered in distribution. Each crushing roller 5 has multiple crushing grooves 10 and multiple crushing protrusions 16 on its surface. The crushing protrusions 16 and the crushing grooves 10 of the other crushing roller 5 form a crushing zone 14, with a length of 2.6 to 2.7 mm. Material is crushed in the crushing zone 14 to obtain fine material, which is then discharged from the outlet below the crushing zone 14. The frame 1 is connected to a scraper 6 for scraping material from the surfaces of the two crushing rollers 5, and a drive mechanism for rotating the two crushing rollers 5 is also connected to the frame 1.

[0020] Material enters the frame 1 through the feed inlet 7. Two crushing rollers 5 rotate in opposite directions. The crushing groove 10 and the crushing protrusion 16 work together to crush the material. The edge of the crushing groove 10 generates local high stress when squeezing the material, which promotes the material to break. Fine material can be obtained, improving the processing quality and replacing the traditional smooth crushing roller 5 design.

[0021] The connection between the crushing trough 10 and the crushing protrusion 16, as well as the bottom of the crushing trough 10, are all chamfered to reduce material residue.

[0022] The scraper 6 has multiple protruding ends 11 and multiple scraping grooves 12 at its end. The scraping grooves 12 match the crushing protrusions 16, and the protruding ends 11 match the crushing grooves 10.

[0023] The scraper 6 has an L-shaped structure and multiple mounting holes 15. Bolts are connected to the mounting holes 15 and are threaded to the frame 1. The scraper 6 can scrape off the material remaining on the crushing roller 5, thereby cleaning the crushing roller 5 and preventing material accumulation from affecting the crushing efficiency.

[0024] There are four scrapers 6 in total. Each crushing roller 5 corresponds to two scrapers 6, and the two scrapers 6 are distributed vertically, which can fully clean the crushing roller 5 and improve the cleanliness of the crushing roller 5.

[0025] The drive mechanism includes a motor, a belt, a drive wheel 4, a first rotating shaft 3, a drive gear 8, a driven gear 9, and a second rotating shaft 13. The output end of the motor is connected to the drive wheel 4 via the belt. Both ends of the first rotating shaft 3 are connected to the drive wheel 4 and the drive gear 8, and the first rotating shaft 3 is fixedly connected to the crushing roller 5. The drive gear 8 drives the driven gear 9 to rotate. The driven gear 9 is connected to the end of the second rotating shaft 13, which is fixedly connected to another crushing roller 5. The motor and belt are not shown in the diagram and are existing technologies. The motor drives the drive wheel 4 to rotate via the belt. The drive wheel 4 drives the first rotating shaft 3 to rotate, which in turn drives the drive gear 8 to rotate. The drive gear 8 drives the driven gear 9 to rotate, causing the second rotating shaft 13 to rotate. The first rotating shaft 3 and the second rotating shaft 13 respectively drive the corresponding crushing roller 5 to rotate in opposite directions, thus achieving the crushing of materials.

[0026] The drive tooth 8 and driven tooth 9 mesh together, resulting in high transmission efficiency. The diameter of the drive tooth 8 is smaller than that of the driven tooth 9, causing the two crushing rollers 5 to rotate at different speeds, creating a speed difference. This speed difference results in different linear velocities of the two crushing rollers 5 relative to the material, generating shearing force. This shearing action is more effective than simple compression, reducing material blockage. Simultaneously, the speed difference extends the residence time of the material in the crushing zone 14, increasing the probability of secondary crushing, making the material more uniform, and reducing the proportion of excessively coarse or excessively fine particles.

[0027] Two bearing seats 2 are connected to both sides of the frame 1. Rotary shaft 1 3 and rotary shaft 2 13 are rotatably connected to the bearing seats 2. The bearing seats 2 guide the rotary shaft 1 3 and rotary shaft 2 13, improving the rotational stability of the rotary shaft 1 3 and rotary shaft 2 13.

[0028] Working principle: Material is fed into the frame 1 through the feed inlet 7. The motor drives the drive wheel 4 to rotate via a belt. The drive wheel 4 drives the rotating shaft 3 to rotate, thereby rotating the drive gear 8. The drive gear 8 works in conjunction with the driven gear 9 to drive the rotating shaft 13, causing the two crushing rollers 5 to rotate in opposite directions with a certain speed difference. This ensures thorough crushing of the material. The crushed material is discharged from the outlet below the crushing zone 14. Simultaneously, as the crushing rollers 5 rotate, the scraper 6 scrapes away any residual material, cleaning the rollers and preventing material accumulation that could affect crushing efficiency. This design is highly practical.

[0029] 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 fine crushing device for coal processing, comprising a frame (1) and an inlet (7) and an outlet disposed at the top and bottom ends of the frame (1), characterized in that, The frame (1) is connected to two rotatable crushing rollers (5), which are staggered and have multiple crushing grooves (10) and multiple crushing protrusions (16) on their surfaces. The crushing protrusions (16) and the crushing grooves (10) of the other crushing roller (5) form a crushing zone (14). The frame (1) is connected to a scraper (6) for scraping off the material on the surfaces of the two crushing rollers (5), and the frame (1) is connected to a drive mechanism for driving the two crushing rollers (5) to rotate.

2. The fine crushing device for processing coal according to claim 1, characterized in that, The scraper (6) has multiple protruding ends (11) and multiple scraping grooves (12) at its end. The scraping grooves (12) match the crushing protrusions (16), and the protruding ends (11) match the crushing grooves (10).

3. The fine crushing device for coal processing according to claim 2, characterized in that, The scraper (6) has an L-shaped structure and is provided with multiple mounting holes (15). The mounting holes (15) are connected to bolts, which are threaded to the frame (1).

4. The fine crushing device for processing coal according to claim 3, characterized in that, There are four scrapers (6), with each crushing roller (5) corresponding to two scrapers (6), and the two scrapers (6) are distributed vertically.

5. The fine crushing device for processing coal according to claim 1, characterized in that, The drive mechanism includes a motor, a belt, a drive wheel (4), a first rotating shaft (3), a drive tooth (8), a driven tooth (9), and a second rotating shaft (13). The output end of the motor is connected to the drive wheel (4) via a belt. The two ends of the first rotating shaft (3) are connected to the drive wheel (4) and the drive tooth (8), and the first rotating shaft (3) is fixedly connected to the crushing roller (5). The drive tooth (8) is used to drive the driven tooth (9) to rotate. The driven tooth (9) is connected to the end of the second rotating shaft (13), and the second rotating shaft (13) is fixedly connected to another crushing roller (5).

6. The fine crushing device for processing coal according to claim 5, characterized in that, The driving tooth (8) meshes with the driven tooth (9), and the diameter of the driving tooth (8) is smaller than the diameter of the driven tooth (9).

7. The fine crushing device for processing coal according to claim 5, characterized in that, The frame (1) is connected to two bearing seats (2) on both sides, and the first rotating shaft (3) and the second rotating shaft (13) are rotatably connected to the bearing seats (2).

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