Crushing device for coal mining

Abstract

The utility model relates to the technical field of coal mine crushing, in particular to a crushing device for coal mining, which comprises a fixing frame, a crushing frame, a driving device and a driving device, the crushing mechanism comprises two rotating shafts; the separating frame and the separating assembly are used for separating coal mines needing to be crushed according to the size, under the action of the multiple round rods in the separating assembly, the large coal mines can be intercepted, meanwhile, the coal mines with the maximum width smaller than the width between every two adjacent round rods fall onto a grating plate more dispersedly to be screened, and the screening efficiency is improved. The impact force of the coal mine on the grating plate is reduced, the grating plate is used for separating coal frames falling on the grating plate, the large coal mine enters the two first crushing rollers to be subjected to primary crushing, and the small coal mine and the coal mine crushed by the first crushing rollers enter the space between the two second crushing rollers to be crushed; the coal mine crushing effect is guaranteed, meanwhile, small coal mines are prevented from being excessively crushed, and meanwhile the coal mine crushing efficiency is improved.

Description

A coal mining crushing device Technical Field

[0001] This utility model relates to the field of coal mine crushing technology, and in particular to a coal mine crushing device. Background Technology

[0002] Coal mines are areas where humans extract coal resources in coal-rich areas. They are generally divided into underground coal mines and open-pit coal mines. When the coal seam is far from the surface, underground tunnels are usually dug to extract the coal; this is called an underground coal mine. When the coal seam is very close to the surface, the surface soil layer is usually stripped directly to extract the coal; this is called an open-pit coal mine. After the coal is extracted, crushing equipment is usually used to crush the coal to reduce the space occupied by the mine, thereby facilitating the storage and transportation of raw coal.

[0003] A search revealed a Chinese patent, "A Coal Mine Crushing Device," with publication number CN220460939U. The device involves pouring coal into a first crushing chamber via a feed hopper, driving a pair of crushing rollers to rotate in opposite directions for initial crushing. The crushed coal is then screened through a sieve. Larger pieces of coal fall into a second crushing chamber through a trough under the action of an inclined sieve. A second motor is activated, and a second transmission shaft drives an eccentric wheel to rotate. This, in turn, drives a moving block, causing the movable jaw plate to reciprocate left and right periodically. This, in conjunction with the fixed jaw plate, crushes larger pieces of coal. The crushed coal is then discharged from the first crushing chamber through a connecting port. This constitutes a coal mine crushing device that, through crushing and clamping, achieves multi-stage crushing, improving the crushing effect and facilitating mining operations.

[0004] Although the above application can perform multi-stage crushing of coal mines, the mined coal mines are of uneven size. When the above scheme pours the coal into the first crushing box for crushing, coal mines of uneven size will pass through the first crushing roller at the same time, which can easily cause smaller coal mines to be over-crushed and reduce the efficiency of coal mine crushing.

[0005] Therefore, a coal mining crushing device is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a coal mining crushing device to solve the above-mentioned problems. It improves the problem that coal of uneven size will be crushed by the first crushing roller at the same time, which can easily cause smaller coal to be over-crushed and reduce the crushing efficiency of coal.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a coal mining crushing device, comprising: a fixed frame, on which a crushing frame is mounted; a crushing mechanism, the crushing mechanism comprising two first crushing rollers rotatably connected to the inner wall of the crushing frame, a fixed frame fixedly connected to the bottom end of the crushing frame, two second crushing rollers rotatably connected to the inner wall of the fixed frame, a feeding frame fixedly connected to one side of the top end of the fixed frame, a separation frame fixedly connected to the top end of the crushing frame and the feeding frame, and a separation component disposed inside the separation frame;

[0008] The separation assembly includes a grid plate slidably connected to one side of the inner wall of the separation frame, an installation frame fixedly connected to the upper end of the inner wall of the separation frame, a plurality of evenly distributed round rods fixedly connected to the inner wall of the installation frame, and a fixing plate fixedly connected to the lower end of the inner wall of the separation frame.

[0009] Preferably, a first motor is fixedly connected to one side of the separating frame, and a reciprocating lead screw is fixedly connected to the output shaft of the first motor. A movable plate is provided on the surface of the reciprocating lead screw, and one side of the movable plate extends into the separating frame and is fixedly connected to one side of the grid plate. This facilitates driving the grid plate to continuously move up and down reciprocally.

[0010] Preferably, the grating plate, mounting frame, and fixing plate are all inclined, with the grating plate having the same inclination angle as the mounting frame. The lower end of the grating plate is located above the higher end of the fixing plate, and the lower end of the fixing plate is located above the feed frame. This facilitates better unloading of the separated coal.

[0011] Preferably, a plurality of connecting rods are fixedly connected to one side of the top of the grating plate, and a tamping rod is fixedly connected to the end of each connecting rod away from the grating plate. The plurality of tamping rods and the plurality of round rods are staggered on the horizontal plane. This facilitates the pushing of coal stuck between two adjacent round rods during the continuous up-and-down reciprocating movement of the grating plate, ensuring that the coal is fully discharged through the gap between the two round rods. At the same time, under the action of the multiple tamping rods, it helps to better disperse the falling coal on the grating plate.

[0012] Preferably, the top of the grating is fixedly connected to multiple mounting rods, which are evenly distributed horizontally. When the grating moves the mounting rods up and down repeatedly, it facilitates continuous collisions between the rods and the coal on the grating. This creates gaps between larger coal particles and the grating, allowing smaller coal particles to fall more easily through the grating's openings, thus enhancing the grating's coal separation effect.

[0013] Preferably, a guide plate is fixedly connected to the other side of the inner wall of the separation frame, and the guide plate is inclined. This facilitates the guidance of coal falling from the mounting frame and the grating plate, ensuring that smaller pieces of coal fall more effectively into the middle of the two first crushing rollers.

[0014] Preferably, a first baffle is fixedly connected to the lower end of the grating, and one side of the first baffle is abutted against one side of the higher end of the fixed plate. This ensures that coal falling through the holes of the grating falls fully onto the fixed plate.

[0015] Preferably, a second baffle is fixedly connected to one side of the bottom of the mounting frame, and the second baffle is inclined. This prevents smaller coal particles from being moved into the crushing frame when the tamping rod moves upward.

[0016] The beneficial effects of this utility model are:

[0017] 1. In this solution, a separation frame and separation assembly are used to separate the coal ore to be crushed by size. Under the action of multiple round rods in the separation assembly, larger coal ore is intercepted, while coal ore with a maximum width smaller than the width between two adjacent round rods falls more dispersedly onto the grid plate for screening, reducing the impact force of the coal ore on the grid plate. The grid plate separates the coal frames falling onto it, allowing larger coal ore to enter the two first crushing rollers for primary crushing, while smaller coal ore and the coal ore crushed by the first crushing rollers enter the space between the two second crushing rollers for further crushing. This ensures the crushing effect of the coal ore while avoiding over-crushing of smaller coal ore, thereby improving the crushing efficiency of the coal ore.

[0018] 2. The setting of multiple tamping rods is conducive to pushing the coal stuck between two adjacent round rods during the continuous up and down movement of the grid plate, ensuring that the coal is fully discharged through the gap between the two round rods. At the same time, under the action of multiple tamping rods, it is beneficial to better disperse the falling coal on the grid plate. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of the coal mining and crushing device of this utility model;

[0020] Figure 2 is an exploded view of the fixed frame, crushing frame, and feeding frame of the coal mining crushing device of this utility model.

[0021] Figure 3 is a cross-sectional view of the separation frame and the feeding frame of the coal mining crushing device of this utility model;

[0022] Figure 4 is an exploded view of the installation frame and grating plate of the coal mining crushing device of this utility model.

[0023] Figure 5 is a schematic diagram of the grating structure of the coal mining crushing device of this utility model.

[0024] In the diagram: 100, fixed frame; 200, crushing frame; 300, crushing mechanism; 310, first crushing roller; 320, fixed frame; 330, second crushing roller; 340, feed frame; 350, separation frame; 351, guide plate; 360, separation component; 361, grating plate; 362, mounting frame; 363, round rod; 364, fixed plate; 365, connecting rod; 366, tamping rod; 367, mounting rod; 368, first baffle; 369, second baffle; 370, first motor; 371, reciprocating screw; 372, moving plate. Detailed Implementation

[0025] 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.

[0026] In specific implementation: As shown in Figures 1-5, a coal mining crushing device includes: a fixed frame 100, on which a crushing frame 200 is installed; a crushing mechanism 300, which includes two first crushing rollers 310 rotatably connected to the inner wall of the crushing frame 200; a fixed frame 320 fixedly connected to the bottom end of the crushing frame 200; two second crushing rollers 330 rotatably connected to the inner wall of the fixed frame 320; a feed frame 340 fixedly connected to one side of the top end of the fixed frame 320; a separation frame 350 fixedly connected to the top end of the crushing frame 200 and the feed frame 340; and a separation component 360 disposed inside the separation frame 350.

[0027] The separation component 360 includes a grid plate 361 slidably connected to one side of the inner wall of the separation frame 350, an installation frame 362 fixedly connected to the upper end of the inner wall of the separation frame 350, a plurality of evenly distributed round rods 363 fixedly connected to the inner wall of the installation frame 362, and a fixing plate 364 fixedly connected to the lower end of the inner wall of the separation frame 350.

[0028] In this embodiment, an inclined guide plate is fixedly connected to the lower end of the inner wall of the fixed frame 100. The coal crushed by the two second crushing rollers 330 will fall onto the guide plate and be discharged. The top end of the fixed frame 320 is connected to the bottom end of the crushing frame 200 and the bottom end of the feeding frame 340. The bottom end of the separating frame 350 is connected to the top end of the crushing frame 200 and the top end of the feeding frame 340. The distance between the two second crushing rollers 330 is less than the distance between the two first crushing rollers 310. The width between two adjacent round rods 363 is greater than the width of the holes in the grid plate 361.

[0029] One end of each of the two first crushing rollers 310 extends through the crushing frame 200 and is fixedly connected to a first gear. The two first gears are meshed together. A second motor is fixedly connected to the side of the crushing frame 200 away from the feed frame 340. The output shaft of the second motor is installed with one of the first gears. The second motor is started by the controller and can drive the two first crushing rollers 310 through the two first gears to drive the two first gears to rotate in opposite directions to crush the coal.

[0030] One end of each of the two second crushing rollers 330 extends through the fixed frame 320 and is fixedly connected to a second gear. The two second gears mesh with each other. A third motor is fixedly connected to one side of the fixed frame 320. The output shaft of the third motor is installed with one of the second gears. The third motor is started by the controller, which drives the two second crushing rollers 330 to rotate in opposite directions to crush the coal.

[0031] As shown in Figures 3 and 4, a first motor 370 is fixedly connected to one side of the separation frame 350. A reciprocating screw 371 is fixedly connected to the output shaft of the first motor 370. A movable plate 372 is provided on the surface of the reciprocating screw 371. One side of the movable plate 372 extends into the separation frame 350 and is fixedly connected to one side of the grid plate 361.

[0032] In this embodiment, the first motor 370 is started by the controller. The output shaft of the first motor 370 drives the reciprocating screw 371 to rotate. The reciprocating screw 371 is in the form of two threaded grooves with the same pitch and opposite directions, connected at both ends by a transition curve. The rotation of the reciprocating screw 371 causes the side of the spiral groove to push the slider placed in the spiral groove to move axially back and forth. Therefore, when the reciprocating screw 371 rotates, it drives the grid plate 361 to move up and down back and forth through the moving plate 372. The inner wall of the separation frame 350 is provided with a moving groove that matches the moving plate 372. A protective plate is fixedly connected to one side of the top end and one side of the bottom end of the grid plate 361. The protective plate matches the moving groove, and one side of the protective plate is in contact with the inner wall of the separation frame 350. When the grid plate 361 moves up and down, the protective plate will protect the moving groove to prevent coal mines from passing through the moving groove.

[0033] It should be noted that two fixing blocks are fixedly connected to one side of the separation frame 350. The inner wall of the fixing block is fixedly connected to the surface of the reciprocating screw 371. Corrugated sleeves are fixedly connected to the opposite ends of the two fixing blocks. The corrugated sleeves are rubber components. The opposite ends of the two corrugated sleeves are fixedly connected to the top and bottom ends of the moving plate 372, respectively. The reciprocating screw 371 is set inside the corrugated sleeve to protect the reciprocating screw 371. When the moving plate 372 moves, it drives the corresponding corrugated sleeve to extend and retract.

[0034] As shown in Figures 3 and 4, the grating plate 361, the mounting frame 362 and the fixing plate 364 are all inclined. The inclination angle of the grating plate 361 is the same as that of the mounting frame 362. The lower end of the grating plate 361 is above the higher end of the fixing plate 364, and the lower end of the fixing plate 364 is above the feed frame 340.

[0035] In this embodiment, the lowest end of the mounting frame 362 and the lowest end of the grating plate 361 are located on the same vertical plane, and there is a distance between the lower end of the mounting frame 362 and the lower end of the grating plate 361 and the other side of the inner wall of the separation frame 350, which facilitates the unloading of larger coal mines. In the initial state, the grating plate 361 is at its lowest height within the vertical movement range. When the grating plate 361 is at its lowest height, the distance between the bottom end of the grating plate 361 and the top end of the fixing plate 364 does not affect the guiding operation of the fixing plate 364 on the coal mine.

[0036] As shown in Figures 4 and 5, a plurality of connecting rods 365 are fixedly connected to one side of the top of the grid plate 361. A tamping rod 366 is fixedly connected to the end of the connecting rod 365 away from the grid plate 361. The plurality of tamping rods 366 and the plurality of round rods 363 are staggered on the horizontal plane.

[0037] In this embodiment, multiple tamping rods 366 are arranged at an angle, and the vertical cross section of the tamping rod 366 is triangular. The angle of inclination of the tamping rod 366 is the same as the angle of inclination of the mounting frame 362. When the grid plate 361 drives the tamping rod 366 to move upward to the highest height through the connecting rod 365, the tamping rod 366 will enter between two adjacent round rods 363, and the tamping rod 366 and the round rod 363 are on the same axis.

[0038] As shown in Figure 5, a plurality of mounting rods 367 are fixedly connected to the top of the grating plate 361, and the plurality of mounting rods 367 are evenly distributed along the horizontal direction.

[0039] In this embodiment, the grid plate 361 has multiple longitudinal holes as a group, and the mounting rod 367 is installed between two adjacent holes. The vertical cross section of the mounting rod 367 is an isosceles triangle.

[0040] As shown in Figure 2, a guide plate 351 is fixedly connected to the other side of the inner wall of the separation frame 350, and the guide plate 351 is set at an angle.

[0041] In this embodiment, the lower end of the guide plate 351 is located above the two first crushing rollers 310, and the guide plate 351 guides the coal entering the crushing frame 200.

[0042] As shown in Figure 5, a first baffle 368 is fixedly connected to the lower end of the grating plate 361, and one side of the first baffle 368 is attached to one side of the higher end of the fixing plate 364.

[0043] In this embodiment, when the grille plate 361 drives the first baffle 368 to move upward to the highest height, the contact surface between the first baffle 368 and the fixed plate 364 is always in contact.

[0044] As shown in Figure 4, a second baffle 369 is fixedly connected to one side of the bottom end of the mounting frame 362, and the second baffle 369 is set at an angle.

[0045] In this embodiment, when the tamping rod 366 is at its lowest height, the lowest end of the tamping rod 366 is located within the angle between the second baffle 369 and the mounting frame 362.

[0046] In use, the coal to be crushed is poured into the separation frame 350 through the feed inlet at the top of the separation frame 350. Simultaneously, the controller starts the first motor 370, which drives the reciprocating screw 371 to rotate. This causes the moving plate 372 to continuously move the grid plate 361 up and down. At the same time, the two first crushing rollers 310 and two second crushing rollers 330 rotate in opposite directions. After the coal is poured into the separation frame 350, multiple round rods 363 separate larger pieces of coal. Larger pieces fall between the two first crushing rollers 310 through the inclined round rods 363 for crushing. Coal with a maximum width smaller than the width between two adjacent round rods 363 falls onto the grid plate 361. During the up-and-down movement of the grid plate 361, coal smaller than the holes in the grid plate 361 falls onto the fixed plate 364 and is then crushed by the fixed plate 364 and the feed frame 361. Coal ore larger than the holes in the grid plate 361 will fall between the two first crushing rollers 310 for crushing. Coal ore larger than the holes in the grid plate 361 will fall through the inclined surface of the grid plate 361 into the two first crushing rollers 310 for crushing. The grid plate 361 will drive multiple tamping rods 366 to move up and down repeatedly through multiple connecting rods 365 to push the coal ore stuck between two adjacent round rods 363. At the same time, during the up and down reciprocating movement of the grid plate 361, the coal ore on the grid plate 361 will continuously collide with the mounting rods 367, so that smaller coal ore on the grid plate 361 can fall more easily through the holes in the grid plate 361. Larger coal ore will fall to the two first crushing rollers 310 for initial crushing and then fall between the two second crushing rollers 330 for further crushing. The coal ore crushed by the second crushing rollers 330 will fall onto the guide plate installed on the fixed frame 100 and be discharged through the guide plate.

[0047] It should be noted that the motors and other components mentioned above are all devices with relatively mature existing technologies. The specific model can be selected according to actual needs. The motor can be powered by a built-in power supply or by AC power. The specific power supply method should be selected according to the situation, and will not be elaborated here.

[0048] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A coal mining crushing device, characterized in that, include: A fixed frame (100) is provided with a crushing frame (200); a crushing mechanism (300) includes two first crushing rollers (310) rotatably connected to the inner wall of the crushing frame (200), a fixed frame (320) is fixedly connected to the bottom end of the crushing frame (200), two second crushing rollers (330) are rotatably connected to the inner wall of the fixed frame (320), and a feed frame (340) is fixedly connected to one side of the top end of the fixed frame (320). A separation frame (350) is fixedly connected to the top of the feed frame (340), and a separation component (360) is provided inside the separation frame (350); wherein, the separation component (360) includes a grid plate (361) slidably connected to one side of the inner wall of the separation frame (350), an installation frame (362) is fixedly connected to the upper end of the inner wall of the separation frame (350), a plurality of evenly distributed round rods (363) are fixedly connected to the inner wall of the installation frame (362), and a fixing plate (364) is fixedly connected to the lower end of the inner wall of the separation frame (350).

2. The coal mining crushing device according to claim 1, characterized in that: A first motor (370) is fixedly connected to one side of the separation frame (350), and a reciprocating screw (371) is fixedly connected to the output shaft of the first motor (370). A movable plate (372) is provided on the surface of the reciprocating screw (371), and one side of the movable plate (372) extends into the separation frame (350) and is fixedly connected to one side of the grid plate (361).

3. The coal mining crushing device according to claim 1, characterized in that: The grating plate (361), mounting frame (362) and fixing plate (364) are all inclined. The inclination angle of the grating plate (361) is the same as that of the mounting frame (362). The lower end of the grating plate (361) is above the higher end of the fixing plate (364), and the lower end of the fixing plate (364) is above the feed frame (340).

4. A coal mining crushing device according to claim 1, characterized in that: Multiple connecting rods (365) are fixedly connected to one side of the top of the grating plate (361). A tamping rod (366) is fixedly connected to the end of the connecting rod (365) away from the grating plate (361). The multiple tamping rods (366) and multiple round rods (363) are staggered on the horizontal plane.

5. A coal mining crushing device according to claim 4, characterized in that: The top of the grating plate (361) is fixedly connected to a plurality of mounting rods (367), which are evenly distributed along the horizontal direction.

6. A coal mining crushing device according to claim 1, characterized in that: A guide plate (351) is fixedly connected to the other side of the inner wall of the separation frame (350), and the guide plate (351) is inclined.

7. A coal mining crushing device according to claim 1, characterized in that: The lower end of the grating plate (361) is fixedly connected to a first baffle (368), and one side of the first baffle (368) is attached to one side of the higher end of the fixing plate (364).

8. A coal mining crushing device according to claim 1, characterized in that: A second baffle (369) is fixedly connected to one side of the bottom end of the mounting frame (362), and the second baffle (369) is inclined.

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