A coal washing plant crusher

Abstract

The invention discloses a pulverizer for a coal washing plant, belonging to the technical field of coal processing; the pulverizer comprises a pulverizing chamber surrounded by a bearing platform, a side plate and a movable plate, and a pulverizing roller arranged in the pulverizing chamber; the pulverizing rollers are all arranged in a conical shape, the diameter of the cross section of the pulverizing roller gradually decreases from the movable plate to the direction of the connecting frame, the size of the pulverizing teeth gradually decreases from the large diameter end to the small diameter end of the pulverizing roller, and the spacing of the pulverizing teeth changes from sparse to dense; the large diameter end of the pulverizing roller is higher than the small diameter end, and a crushing space is formed between two pulverizing rollers on a pair of rotating shafts; the invention enables the coal to be subjected to a gradually increasing crushing force when passing through the pulverizing chamber, thereby realizing gradual crushing from coarse to fine, this structure greatly improves the crushing efficiency, reduces the crushing time, and improves the production capacity of the coal washing plant, and by adjusting the spacing between the two pulverizing rollers, the pulverizer can adapt to the crushing of coals of different hardness and particle sizes.

Description

Technical Field

[0001] The invention belongs to the technical field of coal processing and relates to a pulverizer used in a coal washing plant. Background Art

[0002] In the coal processing industry, coal washing plants play a vital role. Their main purpose is to remove impurities in coal, such as ash and sulfur, through physical or chemical methods to improve the purity and quality of coal and meet the market demand for coal of different qualities. In the coal washing process, coal crushing is a key pretreatment step, and its effect directly affects the subsequent washing effect and coal utilization rate. Traditional coal crushing equipment such as jaw crushers and hammer crushers usually use fixed crushing mechanisms and crushing gaps, and cannot be flexibly adjusted according to the type and particle size of coal. This results in these devices often failing to achieve ideal crushing effects when facing coal of different hardness, particle size, and viscosity, and may even cause problems such as blockage and excessive wear, affecting production efficiency and equipment life.

[0003] Therefore, it is necessary to provide a new coal washing plant pulverizer to solve the above-mentioned technical problems. Summary of the invention

[0004] The invention overcomes the shortcomings of the prior art and provides a pulverizer for a coal washing plant.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0006] A coal washing plant pulverizer comprises a pulverizing chamber surrounded by a bearing platform, side plates and a movable plate, and a pulverizing roller arranged in the pulverizing chamber; side plates are symmetrically arranged on both sides of the top of the bearing platform, a movable plate is arranged at one end of the bearing platform, and rotating rods are rotatably connected inside the two sides of the movable plate; a connecting frame is fixedly connected to the other end of the bearing platform, and sliding rods are symmetrically slidably connected inside the connecting frame; one side of the side plate is fixedly connected to the corresponding rotating rod, and the other side of the side plate is fixedly connected to the corresponding sliding rod; at least one pair of rotating shafts are rotatably connected in the pulverizing chamber, one end of the rotating shaft passes through the movable plate and is rotatably connected to the movable plate, and the other end of the rotating shaft passes through the movable plate and is rotatably connected to the movable plate. One end is fixedly connected to the side plate, and the end of the rotating shaft passing through the outer side of the movable plate is connected to the driving shaft through a universal joint, and the driving shaft is connected to a driving device; a crushing roller is fixedly connected to the outer side of the rotating shaft, and a plurality of crushing teeth are arranged on the outer side of the crushing roller; the crushing rollers are all arranged in a conical shape, and the diameter of the cross section of the crushing roller gradually decreases from the movable plate to the direction of the connecting frame, the size of the crushing teeth gradually decreases from the large diameter end to the small diameter end of the crushing roller, and the spacing between the crushing teeth changes from sparse to dense; the large diameter end of the crushing roller is higher than the small diameter end, and a crushing space is formed between the two crushing rollers on a pair of rotating shafts.

[0007] Furthermore, sliding holes are symmetrically provided at the top and bottom of the connecting frame, and both ends of the sliding rod are respectively slidably connected inside the corresponding sliding holes, and both ends of the sliding rod are fixedly connected with stoppers.

[0008] Furthermore, an L-shaped frame is fixedly connected to one side of the movable plate, a driving shaft is symmetrically rotatably connected inside the L-shaped frame, gears are fixedly connected to the outer sides of the two driving shafts, and the gears on the outer sides of the two driving shafts are meshed and connected.

[0009] Furthermore, a fixed seat is fixedly connected to the bottom of the bearing platform, a connecting seat is fixedly connected to the bottom of the L-shaped frame, a threaded rod is threadedly connected to the inside of the connecting seat, and one end of the threaded rod is rotatably connected to the fixed seat; the movable plate is not connected to the bearing platform; when the threaded rod is rotated, the L-shaped frame drives the movable plate to move forward and backward relative to the connecting frame and the bearing platform.

[0010] Furthermore, a discharge port is provided at the bottom of the supporting platform, and the discharge port is connected to a multi-stage screening device.

[0011] Furthermore, the multi-stage screening device includes a silo, one end of the silo is fixedly connected to a rotating disk, the other end of the silo is fixedly connected to an outer ring, one side of the outer ring is rotatably connected to an outer guide bin, a connecting ring is connected inside the rotating disk, one end of the connecting ring is rotatably connected to a feed barrel, the discharge port is communicated with the feed barrel, a receiving ring is rotatably connected inside the outer guide bin, one side of the receiving ring is rotatably connected to a middle guide bin, the middle guide bin is rotatably connected to an inner ring, one side of the inner ring is rotatably connected to the inner guide bin, a coarse rolling screen is fixedly connected between the inner ring and the connecting ring, a fine rolling screen is fixedly connected between the receiving ring and the rotating disk, and the fine rolling screen is sleeved on the outside of the coarse rolling screen, a transmission shaft is rotatably connected between the inner guide bin and the feed barrel, and the outer side of one end of the transmission shaft is fixedly connected to the inner wall of the connecting ring through a first bracket, the other end of the transmission shaft is fixedly connected to the inner ring, the receiving ring and the outer ring through a second bracket, and the end of the transmission shaft is connected to the output end of the motor.

[0012] Furthermore, a support frame is fixedly arranged at the bottom of the bearing platform, and the interior of the silo is rotatably connected in the support frame.

[0013] Furthermore, the outer material guide bin, the middle material guide bin and the inner material guide bin are all connected to the support frame; the outer material guide bin, the middle material guide bin and the inner material guide bin are all provided with a discharge port.

[0014] Furthermore, a baffle is provided inside the inner ring, and the baffle is fixedly connected to the inner wall of the inner material guide bin through a third bracket, and the diameter of the baffle is smaller than the inner material guide bin; the baffle is rotatably connected to the outside of the transmission shaft, and the baffle is evenly distributed with four sliding grooves around the circumference of the transmission shaft, and a slider is slidably connected in the sliding groove, and a movable block is fixedly connected to the side of the slider facing the coarse rolling screen, and the ends of the movable blocks are fixedly connected with arc-shaped extrusion strips, and an elliptical plate is fixedly connected to the outside of the transmission shaft, the elliptical plate is adjacent to the baffle, and the outer edge of the elliptical plate is located on the inner side of the four arc-shaped extrusion strips, and an elliptical groove is opened on the side of the elliptical plate facing the baffle, and a limit column is provided on the surface of the movable block, and one end of the limit column is slidably connected to the inside of the elliptical groove.

[0015] Furthermore, the discharge port is fixedly connected with a receiving hopper, and the bottom of the receiving hopper is communicated with the feed barrel.

[0016] The beneficial effects of the present invention compared with the prior art are as follows:

[0017] The present invention adopts a conical crushing roller and gradually decreasing crushing teeth, so that the coal can be subjected to gradually increasing crushing force when passing through, thereby realizing gradual crushing from coarse to fine. This design greatly improves the crushing efficiency, reduces the crushing time, and improves the production capacity of the coal washing plant. By adjusting the spacing between the two crushing rollers, the crusher can adapt to coal of different hardness and particle size. No matter it is coal with higher hardness or coal blocks with larger particle size, it can be effectively crushed into fragments that meet the requirements. This adjustable spacing design ensures the uniformity and stability of the crushing effect and improves the utilization rate of coal.

[0018] The bottom of the crusher described in the present invention is also provided with a structure for multi-stage screening of the crushed coal blocks, and an auxiliary crushing mechanism is arranged in the structure. Through the periodic extrusion of the arc extrusion bar, additional pressure and shear force can be applied to the coal blocks, thereby assisting in crushing the coal blocks, allowing the coal with larger particle size remaining in the coarse rolling screen to be crushed again, thereby improving the screening efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a coal washing plant pulverizer provided by the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the side panel shown;

[0021] Figure 3 for Figure 1 The structural schematic diagram of the crushing roller shown;

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the support frame shown;

[0023] Figure 5 for Figure 4 The structural diagram of the silo shown;

[0024] Figure 6 for Figure 5 A structural cross-section of the silo shown;

[0025] Figure 7 for Figure 5 A schematic diagram of the internal structure of the silo shown;

[0026] Figure 8 for Figure 5 The internal structure diagram of the outer guide bin shown;

[0027] Fig. 9 is a schematic diagram of the structure of the baffle;

[0028] Fig.10 for Figure 8 The schematic diagram of the structure of the elliptical plate shown;

[0029] Fig.11 for Figure 8 Schematic diagram of the structure of the arc extrusion strip shown.

[0030] Numbers in the figure:

[0031] 1. Carrying platform; 2. Side plate; 3. Movable plate; 4. Rotating rod; 5. Connecting frame; 6. Sliding rod; 7. Rotating shaft; 8. Crushing roller; 9. Crushing teeth; 10. Fixed plate; 11. Carrying block; 12. Discharge port; 13. Support frame; 14. Silo; 15. Sliding hole; 16. Stopper; 17. L-shaped frame; 18. Drive shaft; 19. Gear; 20. Universal joint; 21. Fixed seat; 22. Connecting seat; 23. Threaded rod; 24. Hand wheel; 25. Rotating disk; 26. Outer ring; 2 7. Outer guide bin; 28. Connecting ring; 29. ​​Feed barrel; 30. Receiving hopper; 31. Receiving ring; 32. Middle guide bin; 33. Inner ring; 34. Inner guide bin; 35. Coarse rolling screen; 36. Fine rolling screen; 37. Motor; 38. Transmission shaft; 39. Baffle; 40. Slider; 41. Movable block; 42. Arc extrusion strip; 43. Elliptical plate; 44. Elliptical groove; 45. Limiting column; 46. First bracket; 47. Second bracket; 48. Third bracket; 49. Slide. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0033] See also Figures 1 to 11 This embodiment proposes a coal washing plant pulverizer, including a bearing platform 1, a side plate 2, a movable plate 3, a rotating rod 4, a connecting frame 5, a sliding rod 6, a rotating shaft 7, a crushing roller 8, a crushing tooth 9, a fixed plate 10 and a bearing block 11. A discharge port 12 is provided at the bottom of the bearing platform 1, and side plates 2 are symmetrically provided on both sides of the top of the bearing platform 1. A movable plate 3 is provided at the front end of the bearing platform 1, and rotating rods 4 are rotatably connected to the inside of the movable plate 3 on both sides; a connecting frame 5 is fixedly connected to the rear end of the bearing platform 1, and sliding rods 6 are symmetrically slidably connected to the inside of the connecting frame 5. For details, see Figure 2 The top and bottom of the connecting frame 5 are symmetrically provided with sliding holes 15, and the two ends of the sliding rod 6 are respectively slidably connected to the corresponding sliding holes 15, and the two ends of the sliding rod 6 are fixedly connected with blocks 16; one side of the side panel 2 is fixedly connected to the corresponding rotating rod 4, and the other side of the side panel 2 is fixedly connected to the corresponding sliding rod 6. The side panel 2 can be rotated relative to the movable panel 3 around the axial direction of the rotating rod 4 through the rotating rod 4, and the other side of the side panel 2 moves left and right along the sliding hole 15 through the sliding rod 6, which is used to adjust the angle between the two side panels 2.

[0034] It should be noted that the slide bar 6 slides in the slide hole 15 of the connecting frame 5 to ensure the stability of the side plate 2 during the rotation process, and the stoppers 16 are fixed at both ends of the slide bar 6 to prevent the slide bar 6 from escaping from the slide hole 15.

[0035] A rotating shaft 7 is symmetrically arranged between the two side plates 2, and a crushing roller 8 is fixedly connected to the outer side of the rotating shaft 7. A plurality of crushing teeth 9 are arranged on the surface of the crushing roller 8. A fixed plate 10 is fixedly connected to the opposite inner rear ends of the two side plates 2. One end of the rotating shaft 7 is rotatably connected to the inside of the corresponding fixed plate 10. A bearing block 11 is symmetrically connected to the inside of the movable plate 3, and the other end of the rotating shaft 7 is rotatably connected to the inside of the corresponding bearing block 11. An L-shaped frame 17 is fixedly connected to one side of the movable plate 3, and a driving shaft 18 is symmetrically rotatably connected to the inside of the L-shaped frame 17. Gears 19 are fixedly connected to the outer sides of the two driving shafts 18. The gears 19 on the outer sides of the two driving shafts 18 are meshed and connected. One end of the driving shaft 18 is rotatably connected to one end of the corresponding rotating shaft 7 through a universal joint 20.

[0036] It should be noted that the design of the gear 19 and the universal joint 20 ensures stable transmission between the drive shaft 18 and the rotating shaft 7; especially when the side plate 2 rotates, the transmission of the rotating shaft 7 and the drive shaft 18 can be guaranteed by the universal joint 20; as the rotating shaft 7 rotates, the two crushing rollers 8 rotate relative to each other, and the coal entering between the two crushing rollers 8 will be crushed by the crushing teeth 9.

[0037] See also Figures 1 to 4The crushing rollers 8 are all set in a conical shape. The diameter of the cross section of the crushing roller 8 gradually decreases from the front end to the rear end of the side plate 2. The size of the crushing teeth 9 gradually decreases from the large diameter end to the small diameter end of the crushing roller 8, and the spacing of the crushing teeth 9 changes from sparse to dense; and the large diameter end of the crushing roller 8 is higher than the small diameter end. The closest points of the outer edges between the two crushing rollers 8 are equal everywhere and the spacing is small, forming a tight crushing space. When the coal enters the crushing chamber composed of the bearing platform 1, the side plate 2 and the movable plate 3, the two crushing rollers 8 rotating in opposite directions start to work, and the crushing teeth 9 on the outer side thereof crush the coal.

[0038] See also Figures 1 to 4 The size changes of the crushing teeth 9, including the tooth height, tooth width and other parameters, gradually decrease from the large diameter end to the small diameter end of the crushing roller 8; the crushing teeth 9 gradually crush the coal from coarse to fine as the crushing roller 8 rotates, achieving an efficient and uniform crushing effect; ensuring that the coal is subjected to a gradually increasing crushing force when passing through.

[0039] A fixed seat 21 is fixedly connected to the bottom of the supporting platform 1, and a connecting seat 22 is fixedly provided at the bottom of the L-shaped frame 17. A threaded rod 23 is threadedly connected to the internal thread of the connecting seat 22, and one end of the threaded rod 23 is rotatably connected to the fixed seat 21; a hand wheel 24 is fixedly connected to the other end of the threaded rod 23; the threaded rod 23 is rotated by rotating the hand wheel 24. When the threaded rod 23 is rotated, the L-shaped frame 17 will drive the movable plate 3 to move forward and backward relative to the connecting frame 5 and the supporting platform 1, and then the sliding rod 6 connected to the side plate 2 moves left and right in the sliding hole 15, which is used to adjust the distance between the two crushing rollers 8 to adapt to the crushing of different types of coal.

[0040] See also Figures 1 to 11A multi-stage screening device is arranged at the bottom of the bearing platform 1 for performing multi-stage screening on the crushed coal; the multi-stage screening device comprises a support frame 13 and a silo 14, the support frame 13 is fixedly arranged at the bottom of the bearing platform 1, the silo 14 is rotatably connected inside the support frame 13, a rotating disk 25 is fixedly connected at one end of the silo 14, an outer ring 26 is fixedly connected at the other end of the silo 14, an outer guide bin 27 is rotatably arranged on one side of the outer ring 26, a connecting ring 28 is connected inside the rotating disk 25, a feeding barrel 29 is rotatably connected at one end of the connecting ring 28, a receiving hopper 30 is fixedly connected to the discharge port 12, the bottom of the receiving hopper 30 is communicated with the feeding barrel 29, and the receiving hopper 30 is fixedly connected to the feeding barrel 29, a receiving ring 31 is rotatably connected inside the outer guide bin 27, a middle guide bin 32 is rotatably connected on one side of the receiving ring 31, and the middle guide bin An inner ring 33 is rotatably connected to the inside of 32, and an inner guide bin 34 is rotatably connected to one side of the inner ring 33. A coarse rolling screen 35 with an annular structure is fixedly connected between the inner ring 33 and the connecting ring 28. A fine rolling screen 36 with an annular structure is fixedly connected between the receiving ring 31 and the rotating disk 25, and the fine rolling screen 36 is sleeved on the outside of the coarse rolling screen 35. A transmission shaft 38 is rotatably connected between the inner guide bin 34 and the feeding barrel 29, and the outer side of one end of the transmission shaft 38 is fixedly connected to the inner wall of the connecting ring 28 through a first bracket 46, and the other end of the transmission shaft 38 is fixedly connected to the inner ring 33, the receiving ring 31 and the outer ring 26 through a cross-shaped second bracket 47. The outer guide bin 27, the middle guide bin 32 and the inner guide bin 34 are all fixedly connected to the support frame 13, and the outer guide bin 27, the middle guide bin 32 and the inner guide bin 34 are all provided with discharge ports. A motor 37 is installed on one side of the support frame 13 , and an output end of the motor 37 is fixedly connected to a corresponding end of the transmission shaft 38 .

[0041] See also Figure 8 , Fig. 9 , Fig.10 and Fig.11 A baffle 39 is provided inside the inner ring 33, and the baffle 39 is fixedly connected to the inner wall of the inner guide bin 34 through a cross-shaped third bracket 48. The diameter of the baffle 39 is smaller than the inner diameter of the inner guide bin 34 to ensure that the coal remaining on the inner wall of the coarse rolling screen 35 can enter the inner guide bin 34 and be discharged.

[0042] The baffle 39 is rotatably connected to the outside of the transmission shaft 38. Four slide grooves 49 are evenly distributed on the baffle 39 around the circumference of the transmission shaft 38. A slider 40 is slidably connected in the slide groove 49. A movable block 41 is fixedly connected to the side of the slider 40 facing the coarse rolling screen 35. The ends of the movable blocks 41 are fixedly connected to arc-shaped extrusion strips 42. An elliptical plate 43 is fixedly connected to the outside of the transmission shaft 38. The elliptical plate 43 is adjacent to the baffle 39, and the outer edge of the elliptical plate 43 is located on the inner side of the four arc-shaped extrusion strips 42. An elliptical groove 44 is opened on the side of the elliptical plate 43 facing the baffle. A limit column 45 is provided on the surface of the movable block 41, and one end of the limit column 45 is slidably connected to the inside of the elliptical groove 44.

[0043] When the transmission shaft 38 rotates, the elliptical plate 43 will rotate accordingly. The elliptical plate 43 acts like an eccentric wheel. As the elliptical plate 43 rotates, the position of the limiting column 45 in the elliptical groove 44 will continue to change. This position change will cause the movable block 41 to reciprocate. The reciprocating motion of the movable block 41 will drive the slider 40 to slide back and forth in the slide groove 49, and at the same time drive the arc-shaped extrusion bar 42 to perform periodic extrusion action to assist in crushing the coal blocks. The periodic extrusion of the arc-shaped extrusion bar 42 can apply additional pressure and shear force to the coal blocks, thereby assisting in crushing the coal blocks, and the coal blocks with larger particle sizes remaining in the coarse rolling screen 35 are crushed again.

[0044] The working principle of the coal washing plant pulverizer provided by the present invention is as follows:

[0045] First, the coal enters the crushing chamber surrounded by the bearing platform 1, the side plate 2 and the movable plate 3. This area constitutes the main working space for coal crushing;

[0046] Next, the two conical crushing rollers 8 are driven by the driving device to rotate in opposite directions through the rotating shaft 7. The crushing teeth 9 on the outer sides of the two crushing rollers 8 are key components for crushing coal. The crushing teeth 9 are uniquely designed, and their tooth height, tooth width and tooth spacing gradually decrease from the large diameter end to the small diameter end of the crushing roller 8. The large diameter end of the crushing roller 8 is higher than the small diameter end, ensuring that the coal can be subjected to a gradually increasing crushing force when passing through, and realizing a gradual crushing from coarse to fine.

[0047] During the crushing process, the user can adjust the distance between the two crushing rollers 8 by operating the threaded rod 23 according to the hardness and particle size requirements of the coal. When the threaded rod 23 rotates, it will drive the L-shaped frame 17 and the movable plate 3 to move relative to the connecting frame 5 and the supporting platform 1. Since the side plate 2 is parallel to the outer edge of the crushing roller 8, the movement of the movable plate 3 will drive the angle of the side plate 2 to change. This angle change causes the distance between one end of the crushing roller 8 connected to the fixed plate 10 to increase, while the other end rotates inside the movable plate 3 through the supporting block 11 to keep the rotation axis of the crushing roller 8 stable. After such adjustment, the outer edge distance between the two crushing rollers 8 forms a trapezoidal structure, and the distance gradually transitions from narrow to wide to meet the crushing needs of coal of different particle sizes.

[0048] Under the rotation of the crushing roller 8 and the action of the crushing teeth 9, the coal is gradually broken into small pieces. The crushed coal is discharged through the discharge port 12 at the bottom of the supporting platform 1 and enters the receiving hopper 30 located below for collection. The design of the receiving hopper 30 ensures the collection of the crushed coal.

[0049] During the entire working process, the slide bar 6 slides in the slide hole 15 of the connecting frame 5, ensuring the stability of the movable plate 3 and the side plate 2 during the movement. The blocks 16 are fixed at both ends of the slide bar 6 to prevent the slide bar 6 from escaping from the slide hole 15, thereby increasing the safety of the equipment. At the same time, the design of the gear 19 and the universal joint 20 ensures stable transmission between the drive shaft 18 and the rotating shaft 7, so that the crushing roller 8 can rotate smoothly.

[0050] A multi-stage screening device for screening coal is provided in the support frame 13. First, coal enters from the receiving hopper 30 and enters the silo 14 through the feeding tube 29. The silo 14 is driven by the motor 37 to rotate through the rotating disk 25 and the transmission shaft 38. The rotation of the silo 14 drives the rotation of the outer ring 26, and then the crushed coal begins to be screened.

[0051] Inside the silo 14, the coal is firstly screened by a coarse rolling screen 35. The coarse rolling screen 35 is composed of a fixed structure between a connecting ring 28 and an inner ring 33, and its surface is covered with sieve holes. When the silo 14 rotates, the coal is rolled and screened on the coarse rolling screen 35. Coal with larger particle size cannot pass through the sieve holes and is retained on the screen surface, and finally enters the inner guide bin 34, while coal with smaller particle size passes through the sieve holes and falls into the next screening area.

[0052] And in the screening process, when the transmission shaft 38 rotates, the elliptical plate 43 will rotate accordingly, and the position of the limiting column 45 in the elliptical groove 44 will change continuously. This position change will cause the movable block 41 to reciprocate along the trajectory of the elliptical groove 44. The reciprocating motion of the movable block 41 will drive the slider 40 to slide back and forth on the baffle 39, and at the same time drive the arc-shaped extrusion bar 42 to perform periodic extrusion action toward the inner wall of the inner guide bin 34 to assist in crushing the coal blocks. The periodic extrusion of the arc-shaped extrusion bar 42 can apply additional pressure and shear force to the coal blocks, thereby assisting in crushing the coal blocks and crushing the coal with larger particle size remaining in the coarse rolling screen 35 again.

[0053] After being screened by the coarse rolling screen 35, the coal with smaller particle size enters the area of ​​the fine rolling screen 36. The fine rolling screen 36 is located on the outside of the coarse rolling screen 35. Its screen hole size is smaller and is used to further screen the coal. The fine rolling screen 36 is fixedly connected to the rotating disk 25 and rotates with the rotation of the silo 14. On the fine rolling screen 36, the coal is rolled and screened again. The coal with smaller particle size passes through the screen hole of the fine rolling screen 36 and finally enters the outer guide bin 27, while the coal with larger particle size is retained on the screen surface of the fine rolling screen 36 and finally enters the middle guide bin 32.

[0054] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A pulverizer for a coal washing plant, characterized in that: The invention comprises a crushing chamber surrounded by a bearing platform (1), a side plate (2) and a movable plate (3), and a crushing roller (8) arranged in the crushing chamber; the side plates (2) are symmetrically arranged on both sides of the top of the bearing platform (1); the movable plate (3) is arranged at one end of the bearing platform (1); both sides of the movable plate (3) are rotatably connected to rotating rods (4); the other end of the bearing platform (1) is fixedly connected to a connecting frame (5); the connecting frame (5) is symmetrically slidably connected to sliding rods (6); one side of the side plate (2) is fixedly connected to the corresponding rotating rod (4); the other side of the side plate (2) is fixedly connected to the corresponding sliding rod (6) ) are fixedly connected; sliding holes (15) are symmetrically opened on the top and bottom of the connecting frame (5), and the two ends of the sliding rod (6) are respectively slidably connected to the corresponding sliding holes (15), and the two ends of the sliding rod (6) are fixedly connected to the stopper (16); the side plate (2) rotates relative to the movable plate (3) around the axial direction of the rotating rod (4) through the rotating rod (4), and the other side of the side plate (2) moves left and right along the sliding hole (15) through the sliding rod (6) to adjust the angle between the two side plates (2); the movable plate (3) moves relative to the connecting frame (5) and the bearing platform (1); At least one pair of rotating shafts (7) are rotatably connected in the crushing chamber, one end of the rotating shaft (7) passes through the movable plate (3) and is rotatably connected to the movable plate (3), and the other end is fixedly connected to the side plate (2). The end of the rotating shaft (7) passing through the outer side of the movable plate (3) is connected to the drive shaft (18) through a universal joint (20), and the drive shaft (18) is connected to a driving device; a crushing roller (8) is fixedly connected to the outer side of the rotating shaft (7), and a plurality of crushing teeth (9) are arranged on the outer side of the crushing roller (8); the crushing rollers (8) are all arranged in a conical shape, and the diameter of the cross section of the crushing roller (8) gradually decreases from the direction of the movable plate (3) to the connecting frame (5), and the size of the crushing teeth (9) gradually decreases from the large diameter end to the small diameter end of the crushing roller (8), and the spacing of the crushing teeth (9) changes from sparse to dense; the large diameter end of the crushing roller (8) is higher than the small diameter end, and a crushing space is formed between the two crushing rollers (8) on the pair of rotating shafts (7).

2. A coal washing plant pulverizer according to claim 1, characterized in that: An L-shaped frame (17) is fixedly connected to one side of the movable plate (3), a driving shaft (18) is symmetrically rotatably connected inside the L-shaped frame (17), gears (19) are fixedly connected to the outsides of the two driving shafts (18), and the gears (19) on the outsides of the two driving shafts (18) are meshingly connected.

3. A coal washing plant pulverizer according to claim 2, characterized in that: The bottom of the bearing platform (1) is fixedly connected to a fixed seat (21), the bottom of the L-shaped frame (17) is fixedly connected to a connecting seat (22), the connecting seat (22) is internally threadedly connected to a threaded rod (23), one end of the threaded rod (23) is rotatably connected to the fixed seat (21); the movable plate (3) is not connected to the bearing platform (1); when the threaded rod (23) is rotated, the L-shaped frame (17) drives the movable plate (3) to move forward and backward relative to the connecting frame (5) and the bearing platform (1).

4. A coal washing plant pulverizer according to claim 1, characterized in that: A discharge port (12) is provided at the bottom of the support platform (1), and the discharge port (12) is connected to a multi-stage screening device.

5. A coal washing plant pulverizer according to claim 4, characterized in that: The multi-stage screening device comprises a silo (14), one end of the silo (14) is fixedly connected to a rotating disk (25), the other end of the silo (14) is fixedly connected to an outer ring (26), one side of the outer ring (26) is rotatably connected to an outer material guide bin (27), a connecting ring (28) is connected inside the rotating disk (25), one end of the connecting ring (28) is rotatably connected to a feed barrel (29), a discharge port (12) is connected to the feed barrel (29), a receiving ring (31) is rotatably connected inside the outer material guide bin (27), one side of the receiving ring (31) is rotatably connected to a middle material guide bin (32), the middle material guide bin (32) is rotatably connected to an inner ring (33), one side of the inner ring (33) is rotatably connected to an inner material guide bin (29), and the inner ring (33) is rotatably connected to an inner material guide bin (29). A coarse rolling screen (35) is fixedly connected between the inner ring (33) and the connecting ring (28), a fine rolling screen (36) is fixedly connected between the receiving ring (31) and the rotating disk (25), and the fine rolling screen (36) is sleeved on the outside of the coarse rolling screen (35), a transmission shaft (38) is rotatably connected between the inner guide bin (34) and the feed barrel (29), and the outer side of one end of the transmission shaft (38) is fixedly connected to the inner wall of the connecting ring (28) through a first bracket (46), and the other end of the transmission shaft (38) is fixedly connected to the inner ring (33), the receiving ring (31) and the outer ring (26) through a second bracket (47), and the end of the transmission shaft (38) is connected to the output end of the motor (37).

6. A coal washing plant pulverizer according to claim 5, characterized in that: A support frame (13) is fixedly arranged at the bottom of the bearing platform (1), and the silo (14) is rotatably connected inside the support frame (13).

7. A coal washing plant pulverizer according to claim 6, characterized in that: The outer material guide bin (27), the middle material guide bin (32) and the inner material guide bin (34) are all connected to the support frame (13); and the outer material guide bin (27), the middle material guide bin (32) and the inner material guide bin (34) are all provided with a material outlet.

8. A coal washing plant pulverizer according to claim 5, characterized in that: A baffle (39) is provided inside the inner ring (33). The baffle (39) is fixedly connected to the inner wall of the inner guide bin (34) through a third bracket (48). The diameter of the baffle (39) is smaller than the inner diameter of the inner guide bin (34). The baffle (39) is rotatably connected to the outer side of the transmission shaft (38). Four slide grooves (49) are evenly distributed around the circumference of the transmission shaft (38) on the baffle (39). A slider (40) is slidably connected in the slide groove (49). The slider (40) is fixedly connected to a movable member on one side facing the coarse rolling screen (35). A movable block (41) is provided, and the ends of the movable block (41) are fixedly connected with arc-shaped extrusion strips (42). An elliptical plate (43) is fixedly connected to the outside of the transmission shaft (38). The elliptical plate (43) is adjacent to the baffle (39), and the outer edge of the elliptical plate (43) is located inside the four arc-shaped extrusion strips (42). An elliptical groove (44) is provided on the side of the elliptical plate (43) facing the baffle. A limiting column (45) is provided on the surface of the movable block (41), and one end of the limiting column (45) is slidably connected inside the elliptical groove (44).

9. A coal washing plant pulverizer according to claim 5, characterized in that: A material discharge port (12) provided at the bottom of the support platform (1) is fixedly connected to a material receiving hopper (30), and a bottom of the material receiving hopper (30) is in communication with a material feed tube (29).

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