Coal mine crushing and screening device

Abstract

The utility model discloses a coal mine crushing and screening device relates to coal mine technical field, including crushing and screening box, the one side fixed mounting of crushing and screening box top has feed hopper, and the other side of crushing and screening box bottom is provided with the discharge gate, the utility model discloses through the rotary drive assembly drive screening cylinder rotation, make the coal in the inside of screening cylinder be received by the edge plate and stir, constantly the lump coal and the pulverized coal of required granularity size are screened from the sieve hole, and the remaining big lump coal falls on the crushing assembly and carries out the crushing, and the lump coal and the pulverized coal of required granularity size after crushing and after the sieve hole screening, after first screen cloth further screening, the lump coal of required granularity size is discharged from the discharge gate, and the pulverized coal falls into the powder collecting box and is collected, through the prescreening before the pulverized coal, the lump coal and the pulverized coal of required granularity size are screened, can avoid the crushing assembly to the coal excessive crushing, and simultaneously, make the crushing assembly only to the large lump coal and carry out the crushing, improved the crushing efficiency of the crushing assembly to the coal.

Description

Technical Field

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

[0002] After coal mining, the coal needs to be crushed using crushing equipment to form coal of different particle sizes and qualities. In the crushing process, lump coal and pulverized coal will inevitably be produced. Lump coal can be used for blast furnace injection, industrial kilns, thermal power plants, steam boilers, etc., and has a higher selling price. Pulverized coal can be used to make coal briquettes, coal-water slurry, or as a raw material for coal chemical industry (such as gasification and liquefaction). They have different uses, so it is necessary to screen the crushed lump coal and pulverized coal.

[0003] Currently, after coal mining, excavators are used to feed coal into the hopper of the crushing device for direct crushing. However, since the mined coal includes large lump coal, lump coal of the required particle size, and pulverized coal, directly feeding these materials into the hopper together will not only cause the lump coal of the required particle size to be over-crushed into coal powder, but will also affect the coal crushing efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, this utility model provides a coal mine crushing and screening device to solve the problem that since the coal after mining includes large lump coal, lump coal of the required particle size and pulverized coal, directly feeding large lump coal, lump coal of the required particle size and pulverized coal into the feed hopper will not only cause the lump coal of the required particle size to be over-crushed into coal powder, but also affect the coal crushing efficiency.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a coal mine crushing and screening device, comprising... A crushing and screening box, wherein a feed hopper is fixedly installed on one side of the top of the crushing and screening box, and a discharge port is opened on the other side of the bottom of the crushing and screening box; and a crushing component is installed inside the crushing and screening box. The first inner partition, the second inner partition, and the screening cylinder are fixedly arranged in the crushing and screening box from left to right. The screening cylinder passes through the second inner partition, and both ends of the screening cylinder are rotatably connected to the crushing and screening box and the first inner partition, respectively. The screening cylinder has screen holes evenly distributed on the right side of the second inner partition. The first screen and the feed inlet are located at the bottom of the second inner partition. The first screen passes through the feed inlet and is inclined inside the crushing and screening box. A rotary drive assembly is disposed on the outside of the crushing and screening box and is used to drive the screening cylinder to rotate.

[0006] Preferably, the screening cylinder is funnel-shaped and the opening faces upwards toward the crushing component.

[0007] Preferably, the size of the sieve opening is larger than the mesh size of the first sieve.

[0008] Preferably, the rotary drive assembly includes a second motor, which is fixedly installed on the outside of the crushing and screening box. The output end of the second motor is connected to a third gear. A gear ring is fixedly installed at one end of the screening cylinder near the feed hopper. The third gear meshes with the gear ring. Symmetrical ribs are arranged inside the screening cylinder along the diameter direction.

[0009] Preferably, the bottom of the crushing and screening box is equipped with a powder collection box that is pulled out, and a handle is fixedly installed on one side of the powder collection box.

[0010] Preferably, the bottom four corners of the first screen are connected to the crushing and screening box by elastic elements, and the bottom of the crushing and screening box is provided with a vibrator that can make the first screen vibrate.

[0011] Preferably, the crushing assembly includes a first motor, two first crushing rollers, and two second crushing rollers. The first motor is fixedly mounted on the crushing and screening box. The two first crushing rollers are rotatably connected to the inner cavity of the crushing and screening box and located on the left side of the bottom of the first inner partition. The two second crushing rollers are rotatably connected to the inner cavity of the crushing and screening box and located on the side close to the second inner partition. The output end of the first motor is connected to one end of the first crushing roller. A first gear is fixedly mounted on the same end of each of the two first crushing rollers, and the two first gears mesh with each other. A second gear is fixedly mounted on the same end of each of the two second crushing rollers, and the two second gears mesh with each other. A second screen is inclinedly arranged inside the crushing and screening box and located between the first crushing rollers and the second crushing rollers. A transmission component is provided between the first crushing rollers and the second crushing rollers.

[0012] Preferably, the distance between the two first crushing rollers is greater than the distance between the two second crushing rollers, and the mesh size of the second screen is the same as the mesh size of the screen hole.

[0013] Preferably, the crushing and screening box is further provided with a guide plate parallel to the second screen, and the guide plate is located between the second crushing roller and the first screen.

[0014] Preferably, the transmission component includes a first pulley, a second pulley, and a belt. The first pulley and the second pulley are respectively fixedly installed at the same end of the left first crushing roller and the left second crushing roller, and the belt is fitted onto the first pulley and the second pulley.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This invention uses a rotary drive assembly to drive the screening cylinder to rotate, causing the coal to be agitated by the ribs inside the screening cylinder. This continuously filters out lump coal and pulverized coal of the required particle size through the screen holes. The remaining large lumps of coal fall onto the crushing assembly for crushing. The crushed lumps and pulverized coal of the required particle size, along with the coal lumps and pulverized coal that have passed through the screen holes, are further screened through a first screen. The lump coal of the required particle size is discharged from the discharge port, while the pulverized coal falls into the dust collection box for collection. By pre-screening the coal before crushing, the required particle size of lump coal and pulverized coal can be screened out, which can prevent the crushing assembly from over-crushing the coal. At the same time, it allows the crushing assembly to crush only large lumps of coal, thus improving the crushing efficiency of the coal.

[0016] This invention uses a first motor to drive the first crushing roller to rotate, which enables the two first crushing rollers to perform the first crushing process on the coal. After crushing, the lump coal and pulverized coal that meet the required particle size are screened through a second screen. The remaining larger lump coal is then crushed a second time by the second crushing roller. Compared with single-stage crushing, the energy consumption of the crushing process can be reduced through two-stage crushing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a three-dimensional view of the internal structure of the crushing and screening box of this utility model; Figure 3 This is a cross-sectional view of the relevant structure inside the crushing and screening box of this utility model; Figure 4 This is a schematic diagram of the relevant structure of the rotary drive assembly of this utility model; Figure 5 This is a schematic diagram of the relevant structure of the crushing component of this utility model.

[0018] [Figure Labels] 1. Crushing and screening box; 2. Feed hopper; 3. Discharge port; 4. Crushing assembly; 41. First motor; 42. First crushing roller; 43. First gear; 44. Second screen; 45. Second crushing roller; 46. Second gear; 47. First pulley; 48. Second pulley; 49. Belt; 410. Guide plate; 5. First inner partition; 6. Second inner partition; 7. Screening cylinder; 8. Screen hole; 9. First screen; 10. Feed inlet; 11. Rotary drive assembly; 111. Second motor; 112. Third gear; 113. Gear ring; 12. Rib plate; 13. Powder collection box; 14. Handle; 15. Elastic element; 16. Vibrator. Detailed Implementation

[0019] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0020] As attached Figure 1 To be continued Figure 5 This utility model provides a coal mine crushing and screening device, including a crushing and screening box 1, a feed hopper 2 fixedly installed on one side of the top of the crushing and screening box 1, and a discharge port 3 opened on the other side of the bottom of the crushing and screening box 1. A crushing component 4 is arranged inside the crushing and screening box 1; a first inner partition 5, a second inner partition 6, and a screening cylinder 7. The first inner partition 5 and the second inner partition 6 are fixedly arranged in the crushing and screening box 1 from left to right. The screening cylinder 7 passes through the second inner partition 6, and both ends of the screening cylinder 7 are rotatably connected to the crushing and screening box 1 and the screen. On the first inner partition 5, the screening cylinder 7 has screen holes 8 evenly distributed on the right side of the second inner partition 6; a first screen 9 and a feed inlet 10, the feed inlet 10 is opened at the bottom of the second inner partition 6, the first screen 9 passes through the feed inlet 10 and is inclinedly arranged in the crushing and screening box 1; a rotary drive assembly 11 is arranged on the outside of the crushing and screening box 1 and is used to drive the screening cylinder 7 to rotate. The screening cylinder 7 is arranged in a trumpet shape and the opening faces the top of the crushing assembly 4. The size of the screen holes 8 is larger than the mesh size of the first screen 9.

[0021] Among them, the screen hole 8 is used to screen out the lump coal and pulverized coal of the required particle size in the coal, the second inner baffle 6 is used to separate the screened lump coal and pulverized coal from the crushing component 4, the first screen 9 is used to further screen the lump coal and pulverized coal of the required particle size, and discharge the lump coal of the required particle size from the discharge port 3.

[0022] Preferably, the rotary drive assembly 11 includes a second motor 111, which is fixedly installed on the outside of the crushing and screening box 1. The output end of the second motor 111 is connected to a third gear 112. A gear ring 113 is fixedly installed at one end of the screening cylinder 7 near the feed hopper 2. The third gear 112 meshes with the gear ring 113. Symmetrical ribs 12 are arranged inside the screening cylinder 7 along the diameter direction.

[0023] The second motor 111 drives the third gear 112 to mesh with the gear ring 113, which drives the screening cylinder 7 to rotate, causing the rib plate 12 to tumble the coal and convey the coal to the crushing component 4 for screening.

[0024] Preferably, a powder collection box 13 is installed at the bottom of the crushing and screening box 1 by a pull-out mechanism, and a handle 14 is fixedly installed on one side of the powder collection box 13.

[0025] The powdered coal screened by the first screen 9 is collected by the powder collection box 13, and the staff can remove the powder collection box 13 from the crushing and screening box 1 by pulling the handle 14.

[0026] Preferably, the bottom four corners of the first screen 9 are connected to the crushing and screening box 1 by elastic members 15, and the bottom of the crushing and screening box 1 is provided with a vibrator 16 that can make the first screen 9 vibrate.

[0027] Among them, the vibrator 16 is existing technology, which can drive the first screen 9 to vibrate, so as to facilitate the full screening of lump coal and pulverized coal of the required particle size.

[0028] Specifically, coal is fed into the feed hopper 2, and the rotating drive assembly 11 drives the screening cylinder 7 to rotate, causing the coal to be agitated by the rib plate 12 inside the screening cylinder 7. The desired size of lump coal and pulverized coal are continuously screened out through the screen holes 8. The remaining large pieces of coal fall onto the crushing assembly 4 for crushing. The crushed lump coal and pulverized coal of the desired size, as well as those screened through the screen holes 8, are further screened through the first screen 9. The desired size of lump coal is discharged from the discharge port 3, while the pulverized coal falls into the powder collection box 13 for collection, thus completing the crushing and screening of coal.

[0029] Preferably, the crushing assembly 4 includes a first motor 41, two first crushing rollers 42, and two second crushing rollers 45. The first motor 41 is fixedly mounted on the crushing and screening box 1. The two first crushing rollers 42 are rotatably connected to the inner cavity of the crushing and screening box 1 and are located on the left side of the bottom of the first inner partition 5. The two second crushing rollers 45 are rotatably connected to the inner cavity of the crushing and screening box 1 and are located on the side close to the second inner partition 6. The output end of the first motor 41 is connected to one end of the first crushing roller 42. A first gear 43 is fixedly mounted on the same end of each of the two first crushing rollers 42, and the two first gears 43 mesh with each other. A second gear is fixedly mounted on the same end of each of the two second crushing rollers 45. 46. ​​Two second gears 46 mesh with each other. A second screen 44 is inclinedly arranged in the crushing and screening box 1 between the first crushing roller 42 and the second crushing roller 45. A transmission component is arranged between the first crushing roller 42 and the second crushing roller 45. The distance between the two first crushing rollers 42 is greater than the distance between the two second crushing rollers 45. The mesh size of the second screen 44 is the same as the mesh size of the screen hole 8. The transmission component includes a first pulley 47, a second pulley 48 and a belt 49. The first pulley 47 and the second pulley 48 are respectively fixedly installed at the same end of the left first crushing roller 42 and the left second crushing roller 45. The belt 49 is fitted on the first pulley 47 and the second pulley 48.

[0030] The first inner partition 5 is used to separate the first crushing roller 42 and the second crushing roller 45.

[0031] Specifically, the first motor 41 drives the first crushing roller 42 to rotate. Two first gears 43 mesh, enabling the two first crushing rollers 42 to perform the first crushing process on the coal. The pulverized coal and pulverized coal that meet the required particle size are screened through the second screen 44. Then, the first pulley 47, the second pulley 48, and the belt 49 drive one of the second crushing rollers 45 to rotate. Similarly, the remaining larger lumps of coal are driven by the second gear 46 to drive the second crushing roller 45 to perform the second crushing process on the crushed coal. Through two-stage crushing, the energy consumption of the crushing process can be reduced compared to single-stage crushing. Furthermore, the setting of the second screen 44 avoids the second crushing roller 45 from over-crushing the coal, and at the same time, improves the crushing efficiency of the second crushing roller 45 on the remaining coal.

[0032] Preferably, the crushing and screening box 1 is also provided with a guide plate 410 parallel to the second screen 44, and the guide plate 410 is located between the second crushing roller 45 and the first screen 9.

[0033] The guide plate 410 guides the lumps and pulverized coal of the required particle size above the first screen 9, so that the lumps and pulverized coal of the required particle size can obtain a sufficiently long screening distance on the first screen 9, thereby facilitating the full screening of the lumps and pulverized coal of the required particle size that fall from the guide plate 410.

[0034] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coal mine crushing and screening device, characterized in that, include A crushing and screening box (1) is provided with a feed hopper (2) fixedly installed on one side of the top of the crushing and screening box (1), and a discharge port (3) is provided on the other side of the bottom of the crushing and screening box (1). A crushing component (4) is provided inside the crushing and screening box (1). The first inner partition (5), the second inner partition (6), and the screening cylinder (7) are fixedly arranged in the crushing and screening box (1) from left to right. The screening cylinder (7) passes through the second inner partition (6), and the two ends of the screening cylinder (7) are rotatably connected to the crushing and screening box (1) and the first inner partition (5) respectively. The screening cylinder (7) has screen holes (8) evenly distributed on the right side of the second inner partition (6). The first screen (9) and the feed inlet (10) are located at the bottom of the second inner partition (6). The first screen (9) passes through the feed inlet (10) and is inclined inside the crushing and screening box (1). A rotary drive assembly (11) is disposed on the outside of the crushing and screening box (1) and is used to drive the screening cylinder (7) to rotate.

2. The coal mine crushing and screening device according to claim 1, characterized in that, The screening cylinder (7) is horn-shaped and its opening faces upwards toward the crushing component (4).

3. The coal mine crushing and screening device according to claim 1, characterized in that, The size of the sieve hole (8) is larger than the mesh size of the first sieve (9).

4. The coal mine crushing and screening device according to claim 1, characterized in that, The rotary drive assembly (11) includes a second motor (111), which is fixedly installed on the outside of the crushing and screening box (1). The output end of the second motor (111) is connected to a third gear (112). A gear ring (113) is fixedly installed at one end of the screening cylinder (7) near the feed hopper (2). The third gear (112) meshes with the gear ring (113). Symmetrical ribs (12) are arranged inside the screening cylinder (7) along the diameter direction.

5. The coal mine crushing and screening device according to claim 1, characterized in that, The bottom of the crushing and screening box (1) is equipped with a powder collection box (13) that is pulled out, and a handle (14) is fixedly installed on one side of the powder collection box (13).

6. The coal mine crushing and screening device according to claim 1, characterized in that, The bottom four corners of the first screen (9) are connected to the crushing and screening box (1) by elastic elements (15), and the bottom of the crushing and screening box (1) is provided with a vibrator (16) that can make the first screen (9) vibrate.

7. The coal mine crushing and screening device according to claim 1, characterized in that, The crushing assembly (4) includes a first motor (41), two first crushing rollers (42), and two second crushing rollers (45). The first motor (41) is fixedly mounted on the crushing and screening box (1). The two first crushing rollers (42) are rotatably connected to the inner cavity of the crushing and screening box (1) and located on the left side of the bottom of the first inner partition (5). The two second crushing rollers (45) are rotatably connected to the inner cavity of the crushing and screening box (1) and located on the side close to the second inner partition (6). The output end of the first motor (41) is connected to the first crushing rollers (42). One end of the first crushing roller (42) is connected to the other end of the first crushing roller (42), and the two first crushing rollers (43) are fixedly installed at the same end. The two first crushing rollers (43) mesh with each other. The two second crushing rollers (45) are fixedly installed at the same end of the first crushing roller (46), and the two second crushing rollers (46) mesh with each other. The crushing and screening box (1) is inclinedly provided with a second screen (44) located between the first crushing roller (42) and the second crushing roller (45). A transmission component is provided between the first crushing roller (42) and the second crushing roller (45).

8. The coal mine crushing and screening device according to claim 7, characterized in that, The distance between the two first crushing rollers (42) is greater than the distance between the two second crushing rollers (45), and the mesh size of the second screen (44) is the same as the mesh size of the screen hole (8).

9. The coal mine crushing and screening device according to claim 7, characterized in that, The crushing and screening box (1) is also provided with a guide plate (410) parallel to the second screen (44), and the guide plate (410) is located between the second crushing roller (45) and the first screen (9).

10. The coal mine crushing and screening device according to claim 7, characterized in that, The transmission component includes a first pulley (47), a second pulley (48), and a belt (49). The first pulley (47) and the second pulley (48) are respectively fixedly installed at the same end of the left first crushing roller (42) and the left second crushing roller (45). The belt (49) is fitted on the first pulley (47) and the second pulley (48).

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