A coal mining using crushing device

Abstract

The utility model discloses a kind of crushing devices for coal mining, including crushing box, the top of crushing box is equipped with feed hopper, and the bottom of crushing box is equipped with discharge hopper, and the upper left side of crushing box is equipped with motor, the upper inside of crushing box is symmetrically equipped with crushing roller;Further include:The left side bolt connection of crushing box has pneumatic cylinder, the inside of crushing box is connected with filter screen below crushing roller, and the left and right sides of filter screen lower surface are all fixed with adhering block.The coal mining crushing device, using double crushing roller relative rotation is crushed to coal block, and the particle size of coal particle after crushing is screened by filter screen, ensure that product granularity is uniform, simultaneously, transmission rod drives cam rotation, realizes reciprocating motion by extruding adhering block under the cooperation of sliding block and first spring, vibration effect is generated, effectively prevent screen hole blockage, guarantee screening efficiency.

Description

Technical Field

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

[0002] A coal mine crushing device is a mechanical device specifically used in coal mining to crush excavated coal and associated ores into smaller granular pieces that meet the requirements for subsequent processing or transportation. Its main function is to crush lumps of coal and ore into smaller granular pieces using various crushing methods, such as compression, impact, and shearing. However, a drawback is that some incompletely crushed or substandard coal pieces are easily transported along with the conveyor belt, requiring them to be re-sorted and re-crushed, which affects the overall crushing efficiency and is inconvenient to use. To address these drawbacks, existing technology (application number: 202420542406.1) has been developed. Chinese patent (authorization announcement date: 2024-11-15) discloses a coal mining crushing device. After coal blocks are fed into the crushing box, they are crushed by crushing rollers. Qualified coal blocks flow out through a filter screen, while some unqualified coal blocks are piled on the filter screen. The drive motor works, and the transmission mechanism drives the belt to rotate, which in turn drives the brush plate to sweep the coal blocks on the filter screen into the circulation inlet. The screw feeder then feeds the coal blocks back into the crushing box through the circulation outlet for secondary or multiple crushing until they are qualified and pass through the filter screen and flow out through the outlet. No manual sorting is required, further improving the overall crushing efficiency and usage effect.

[0003] Existing technology uses a screen frame to screen crushed coal. Unqualified coal pieces are then re-introduced into the crushing box through a circulation outlet for secondary or multiple crushing. However, coal pieces tend to accumulate on the screen frame and clog the screen holes, resulting in a significant reduction in screening efficiency. Furthermore, the vibrating structure of the screen frame reduces the fluidity of the coal pieces on the screen, leading to localized accumulation and uneven distribution across the screen surface. This further affects the screening effect, preventing a large number of coal pieces from passing through the screen frame in a timely manner, resulting in low work efficiency. Therefore, we propose that using a crushing device in coal mines can effectively solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide a crushing device for coal mining, in order to solve the problems mentioned in the background art, such as coal blocks easily accumulating on the filter screen and clogging the screen holes, resulting in a significant reduction in screening efficiency. At the same time, the vibration structure of the filter screen reduces the fluidity of coal blocks on the filter screen, making it easy to form local accumulation and not evenly distributed on the entire screen surface. This will further affect the screening effect, causing a large number of coal blocks to fail to pass through the filter screen in time, resulting in low working efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a crushing device for coal mining, comprising a crushing box, a feed hopper fixedly provided at the top of the crushing box, a discharge hopper fixedly provided at the bottom of the crushing box, and a motor installed on the upper left side of the crushing box; crushing rollers symmetrically arranged on the upper part of the crushing box; further comprising: a cylinder bolted to the left side of the crushing box; a filter screen connected to the crushing box below the crushing rollers, with adhesive blocks fixed on both sides of the lower surface of the filter screen; a transmission rod bearing connected to the crushing box below the filter screen, with cams fixedly fitted on the outer sides of both ends of the transmission rod; a movable plate slidably connected to the top of the crushing rollers inside the crushing box, with a scraper provided at the bottom of the movable plate; and a collection box bolted to the right side of the crushing box.

[0006] Preferably, the crushing roller bearing is connected inside the crushing box, and the left ends of the two crushing rollers extend out of the outer side of the crushing box, and the left ends of the crushing rollers are fixedly connected to the output end of the motor.

[0007] Preferably, a drive gear is fixedly fitted on the outer side of the left end of each of the two crushing rollers, and the two drive gears are meshed together.

[0008] Preferably, the filter screen is slidably disposed inside the crushing chamber via a slider, and a first spring is installed between the bottom of the slider and the inner wall of the crushing chamber. The left end of the transmission rod extends out of the outer side of the crushing chamber, and the transmission rod is connected to the outer side of the left end of the crushing roller via a pulley assembly.

[0009] Preferably, the positions of the bonding block and the cam correspond one-to-one, and the outer side of the cam is bonded to the bottom of the bonding block.

[0010] Preferably, the right side of the crushing box is provided with a discharge port located at the position of the collection box, the top of the scraper extends into the interior of the movable plate, and the scraper and the movable plate are slidably connected, and a second spring is installed between the top of the scraper and the inner wall of the movable plate.

[0011] Preferably, the bottom of the scraper is in contact with the upper surface of the filter screen, and the left side of the movable plate is fixedly connected to the output end of the cylinder.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the coal mine uses a crushing device with a novel structural design, the specific details of which are as follows:

[0013] (1) The incoming coal is crushed by two crushing rollers rotating relative to each other, and the crushed coal particles are screened by a filter screen to ensure that only particles that meet the particle size requirements pass through, thereby ensuring the uniformity of the product particle size and meeting the requirements of subsequent processing or use; further, the transmission rod drives the cam to rotate and reciprocate to squeeze the bonding block, causing the filter screen to move upward. When the cam stops squeezing the bonding block, the filter screen is reset under the action of the slider and the first spring, and the above operation is repeated, so that the filter screen moves up and down and vibrates, thereby preventing the screen holes of the filter screen from being blocked and affecting the screening efficiency.

[0014] (2) The cylinder pushes the movable plate to move, and drives the scraper to move horizontally along the filter screen, which can clean the large coal particles on the filter screen into the collection box. The large coal particles in the collection box can be centrally processed, such as being crushed again or processed in other targeted ways according to their characteristics, so as to realize the effective recycling of resources and improve the economic benefits of coal mining.

[0015] (3) When the filter screen moves up and down, the elastic force of the second spring is used to make the scraper move up and down inside the movable plate, thereby ensuring that the scraper can scrape off the coal blocks, impurities and other materials adhering to the filter screen in a timely manner. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the connection structure between the collection box and the crushing box of this utility model;

[0018] Figure 3 This is a schematic diagram of the meshing structure of the two drive gears of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the cam and transmission rod of this utility model;

[0020] Figure 5 This is a schematic diagram of the connection structure between the scraper and the movable plate of this utility model;

[0021] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Crushing box; 2. Feed hopper; 3. Discharge hopper; 4. Crushing roller; 5. Drive gear; 6. Collection box; 7. Filter screen; 8. Cylinder; 9. Slider; 10. First spring; 11. Transmission rod; 12. Cam; 13. Adhesive block; 14. Movable plate; 15. Scraper; 16. Second spring. 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 Figures 1-6 The present invention provides the following technical solution: a crushing device for coal mining;

[0025] Example 1: To address the problem in existing technologies where coal lumps easily accumulate on the filter screen and clog the screen holes, leading to a significant reduction in screening efficiency, and the vibration structure of the filter screen reduces the flowability of coal lumps on the screen, causing localized accumulation and uneven distribution across the screen surface, further affecting screening performance and preventing a large number of coal lumps from passing through the filter screen in a timely manner, resulting in low work efficiency, the following solution is disclosed. Please refer to the following for details. Figures 1-3 As shown, the device includes a crushing box 1, a feed hopper 2 fixedly located at the top of the crushing box 1, and a discharge hopper 3 fixedly located at the bottom of the crushing box 1. A motor is installed on the upper left side of the crushing box 1. Crushing rollers 4 are symmetrically arranged on the upper inside the crushing box 1. The two crushing rollers 4 are connected to the inside of the crushing box 1 by bearings, and the left ends of the two crushing rollers 4 extend out of the outer side of the crushing box 1. The left ends of the crushing rollers 4 are fixedly connected to the output end of the motor. Drive gears 5 are fitted and fixedly installed on the outer side of the left ends of the two crushing rollers 4, and the two drive gears 5 are meshed together. The device also includes a cylinder 8 bolted to the left side of the crushing box 1, and a filter screen 7 connected to the inside of the crushing box 1 below the crushing rollers 4.

[0026] During use, coal blocks enter the crushing box 1 through the feed hopper 2. At the same time, the motor is started, which drives one crushing roller 4 to rotate and drives one drive gear 5 to rotate. This causes the drive gear 5 to drive another meshing drive gear 5 to rotate. At this time, the two crushing rollers 4 rotate relative to each other and crush the incoming coal blocks. Then, the crushed coal particles are screened through the filter screen 7 to ensure that only particles that meet the particle size requirements pass through, thereby ensuring the uniformity of the product particle size and meeting the requirements of subsequent processing or use. After that, the screened coal particles are discharged from the discharge hopper 3.

[0027] Example 2: Unlike Example 1, this example utilizes the vibration of the filter screen 7 to prevent the screen holes of the filter screen 7 from becoming clogged and affecting the screening efficiency. See details... Figure 1 , Figure 3 and Figure 4As shown, the filter screen 7 is slidably disposed inside the crushing box 1 via the slider 9, and a first spring 10 is installed between the bottom of the slider 9 and the inner wall of the crushing box 1. The left end of the transmission rod 11 extends out of the outer side of the crushing box 1, and the transmission rod 11 is connected to the outer side of the left end of the crushing roller 4 via a belt pulley assembly. Adhesive blocks 13 are fixed on both sides of the lower surface of the filter screen 7. The transmission rod 11 is connected to the bearing below the filter screen 7 inside the crushing box 1, and cams 12 are fixed on the outer sides of both ends of the transmission rod 11. The positions of the adhesive blocks 13 and the cams 12 correspond one-to-one, and the outer side of the cams 12 is in contact with the bottom of the adhesive blocks 13.

[0028] The motor drives the crushing roller 4 to rotate at high speed. Through the transmission of the belt pulley assembly, the power is precisely transmitted to the transmission rod 11, which drives the cam 12 mounted on it to rotate synchronously. As the cam 12 rotates, its unique contour curve continuously interacts with the bonding block 13. When the protruding part of the cam 12 squeezes the bonding block 13, it pushes the bonding block 13 to move upward, thereby driving the filter screen 7 to rise synchronously along the guide structure of the slider 9. At this time, the first spring 10 is stretched and stores elastic potential energy. When the cam 12 rotates to a specific position and no longer applies pressure to the bonding block 13, the first spring 10 releases its elastic potential energy. With the assistance of the slider 9, the filter screen 7 is driven to quickly reset. This cycle repeats. Under the synergistic effect of the cam 12 and the first spring 10, the filter screen 7 achieves high-frequency up-and-down reciprocating motion, producing a stable vibration effect, effectively preventing coal particles and impurities from clogging the screen holes, and always maintaining high-efficiency screening performance.

[0029] Example 3: Unlike Example 2, this example utilizes the movement of the scraper 15 to clean large coal particles remaining on the filter screen 7 into the collection box 6, facilitating subsequent secondary crushing. See details... Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, a collection box 6 is bolted to the right side of the crushing box 1. A discharge port is opened on the right side of the crushing box 1 at the position of the collection box 6. A movable plate 14 is slidably connected to the top of the crushing roller 4 inside the crushing box 1. A scraper 15 is provided at the bottom of the movable plate 14. The bottom of the scraper 15 is in contact with the upper surface of the filter screen 7. The left side of the movable plate 14 is fixedly connected to the output end of the cylinder 8. The top of the scraper 15 extends into the interior of the movable plate 14. The scraper 15 and the movable plate 14 are slidably connected. A second spring 16 is installed between the top of the scraper 15 and the inner wall of the movable plate 14.

[0030] The cylinder 8 pushes the movable plate 14 to move, which in turn drives the scraper 15 to move horizontally along the filter screen 7. This allows large coal particles on the filter screen 7 to be cleaned through the discharge port into the collection box 6, so that the large coal particles in the collection box 6 can be centrally processed, such as being crushed again or subjected to other targeted processing according to their characteristics. This achieves effective recycling of resources and improves the economic benefits of coal mining. When the filter screen 7 moves up and down, the elastic force of the second spring 16 allows the scraper 15 to move up and down inside the movable plate 14, thus ensuring that the scraper 15 can scrape off the coal chunks, impurities, etc. adhering to the filter screen 7 in a timely manner.

[0031] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A crushing device for coal mining, comprising a crushing box (1), wherein a feed hopper (2) is fixedly provided at the top of the crushing box (1), and a discharge hopper (3) is fixedly provided at the bottom of the crushing box (1), and a motor is installed on the upper left side of the crushing box (1), and crushing rollers (4) are symmetrically arranged on the upper part of the interior of the crushing box (1); characterized in that, Also includes: A cylinder (8) is bolted to the left side of the crushing box (1). A filter screen (7) is connected inside the crushing box (1) below the crushing roller (4). Adhesive blocks (13) are fixed on both sides of the lower surface of the filter screen (7). A transmission rod (11) is connected to the bearing inside the crushing box (1) below the filter screen (7). Cams (12) are fixed on the outer sides of both ends of the transmission rod (11). A movable plate (14) is slidably connected to the top of the crushing roller (4) inside the crushing box (1). A scraper (15) is provided at the bottom of the movable plate (14). A collection box (6) is bolted to the right side of the crushing box (1).

2. A coal mine crushing device according to claim 1, characterized in that: The two crushing rollers (4) are connected to the inside of the crushing box (1) by bearings, and the left ends of the two crushing rollers (4) extend out of the outer side of the crushing box (1). The left ends of the crushing rollers (4) are fixedly connected to the output end of the motor.

3. A coal mine crushing device according to claim 1, characterized in that: Both of the two crushing rollers (4) have drive gears (5) fixedly fitted on the outer side of their left ends, and the two drive gears (5) are meshed together.

4. A coal mine crushing device according to claim 1, characterized in that: The filter screen (7) is slidably disposed inside the crushing box (1) by a slider (9), and a first spring (10) is installed between the bottom of the slider (9) and the inner wall of the crushing box (1). The left end of the transmission rod (11) extends out of the outer side of the crushing box (1), and the transmission rod (11) is connected to the outer side of the left end of the crushing roller (4) by a belt pulley assembly.

5. A coal mine crushing device according to claim 1, characterized in that: The positions of the bonding block (13) and the cam (12) correspond one-to-one, and the outer side of the cam (12) is bonded to the bottom of the bonding block (13).

6. A coal mine crushing device according to claim 1, characterized in that: The right side of the crushing box (1) is provided with a discharge port located at the position of the collection box (6). The top of the scraper (15) extends into the interior of the movable plate (14), and the scraper (15) and the movable plate (14) are slidably connected. A second spring (16) is installed between the top of the scraper (15) and the inner wall of the movable plate (14).

7. A coal mine crushing device according to claim 1, characterized in that: The bottom of the scraper (15) is in contact with the upper surface of the filter screen (7), and the left side of the movable plate (14) is fixedly connected to the output end of the cylinder (8).

Images