Multi-stage coal mill and method for coal processing

Abstract

The present invention relates to the technical field of coal processing, and discloses a multi-stage coal mill and method for coal processing, including a bearing box, wherein feeding channels are symmetrically provided on both sides of the bearing box, a dredging mechanism is rotatably connected in the bearing box, an auxiliary feeding mechanism is fixed in the bearing box, and the auxiliary feeding mechanism passes through the rotating cylinder and extends into the inner grinding cylinder. In the multi-stage coal mill and method for coal processing, two crushing cylinders rotate relative to each other, and the use of coal grinding blocks can achieve the effect of primary grinding, and then the coal enters between the outer grinding cylinder and the inner grinding cylinder, and the inner grinding cylinder rotates relative to the outer grinding cylinder, which is convenient for secondary grinding of the coal, making the coal grinding effect more efficient and thorough, and the four wheels can rotate themselves while rotating with the connecting frame, and the cutting wire runs, which is convenient for comprehensive dredging of the annular space between the inner grinding cylinder and the outer grinding cylinder, and can play a role of cutting, which is convenient for more efficient completion of secondary grinding and feeding operations.

Description

Technical Field

[0001] The present invention relates to the technical field of coal processing, and in particular to a multi-stage coal mill and a method for coal processing. Background Art

[0002] Coal is a solid combustible mineral that is gradually formed by ancient plants buried underground and undergoing complex biochemical and physicochemical changes. Coal is hailed as black gold and food for industry. It has been one of the main energy sources used by the human world since the 18th century. When processing coal, a coal mill can be used to break up coal blocks and grind them into coal powder.

[0003] The existing coal mills generally only perform one coal grinding operation, and the coal grinding effect is not thorough enough. In addition, coal accumulation is likely to occur during the coal grinding process, which will affect the coal grinding efficiency and the material feeding speed, and congestion is likely to occur during the discharge. In view of the above problems, the existing equipment needs to be improved. Summary of the invention

[0004] The object of the present invention is to provide a multi-stage coal mill and method for coal processing, so as to solve the problem mentioned in the above background technology that the existing coal mills generally only perform one coal grinding operation, the coal grinding effect is not thorough enough, and coal accumulation is likely to occur during the coal grinding process, which will affect the coal grinding efficiency and the material discharge speed, and congestion is likely to occur during the discharge.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-stage coal mill for coal processing, comprising a carrying box, wherein feeding channels are symmetrically opened on both sides of the carrying box, a first bracket is fixed to the top of the carrying box, a first motor is fixed to the inner top of the first bracket, an output end of the first motor faces the bottom and is fixedly connected to a first rotating shaft, a pressing mechanism is fixed to the bottom of the first rotating shaft, a primary coal grinding mechanism is arranged in the carrying box, the primary coal grinding mechanism comprises a second motor, a scraper bar and a second spring, and the second motor is fixed to one side of the carrying box, an output end of the second motor is connected to a first circular gear, and a second circular gear is meshedly connected to the front side of the first circular gear, a crushing barrel is fixed to one side of the first circular gear and one side of the second circular gear, and a rotating ring is fixed to one side of the crushing barrel The swivel ring is rotatably connected to an inner wall of the carrying box, the front and rear ends of the scraper strip are fixed on the inner wall of the carrying box, the crushing cylinder and the scraper strip are arranged one by one above and below, a first groove is provided in the crushing cylinder, an extrusion rod is fixed on an inner wall of the carrying box, the extrusion rod passes through one side of the crushing cylinder and extends into the first groove, a second groove is provided on the outer side of the crushing cylinder, and a movable plate is slidably connected in the second groove, the bottom of the second spring is fixed in the second groove, the top of the second spring is fixed to the top of the movable plate, the second spring is sleeved on the outer side of the movable plate, a roller is fixed on the inner side of the movable plate, and the roller extends into the first groove, a coal grinding block is fixed on the outer side of the movable plate, and the coal grinding blocks are evenly distributed on the movable plate, and the movable plate is evenly distributed on the crushing cylinder in the circumferential direction.

[0006] A secondary coal grinding mechanism is passed through the side of the carrying box, a first support plate is fixed in the carrying box, a rotating drum is passed through the first support plate, an inner grinding drum is fixed on the top of the rotating drum, a dredging mechanism is rotatably connected in the carrying box, an auxiliary material passing mechanism is fixed in the carrying box, and the auxiliary material passing mechanism passes through the rotating drum and extends into the inner grinding drum.

[0007] Preferably, the pressing mechanism includes a turntable, and a track is opened on the side of the turntable, a limiting frame is slidably connected in the track, and a movable frame is fixed to the bottom of the limiting frame, the lower side of the movable frame is connected to the pressing plate through a first spring, and the pressing plate is a square structure, a limiting column is fixed on the upper end surface of the pressing plate, and the limiting column passes through the movable frame.

[0008] Preferably, the secondary coal grinding mechanism includes an airtight passage and an outer grinding cylinder, and the airtight passage is opened in the side wall of the carrying box, and a first piston and a second piston are slidably connected in the airtight passage, a connecting frame is fixed to the outer side of the second piston, and the connecting frame passes through the side wall of the carrying box and is connected to the insertion rod, and the insertion rod is connected to the inner wall of the carrying box through a third spring, and a slot is opened on the outer side of the outer grinding cylinder, and the insertion rod is engaged and connected in the slot.

[0009] Preferably, a first belt transmission assembly is fixed to one side of the second circular gear, and the first belt transmission assembly is rotatably connected to one side of the carrying box, the output end of the first belt transmission assembly is connected to the first bevel gear, and the bottom of the first bevel gear is meshed and connected to the second bevel gear, a second belt transmission assembly is fixed to the bottom of the second bevel gear, and the second belt transmission assembly passes through one side of the carrying box and is connected to the rotating drum, a third belt transmission assembly is fixed to the outside of the first rotating shaft, and the output end of the third belt transmission assembly is connected to the second rotating shaft, a second bracket is fixed to the top of the carrying box, the second rotating shaft is rotatably connected to the second bracket, and a third circular gear is fixed to the outside of the second rotating shaft, one side of the third circular gear is meshed and connected to a fourth circular gear, and the fourth circular gear is rotatably connected to the other side of the carrying box, a third bevel gear is fixed to the top of the fourth circular gear, and one side of the third bevel gear is meshed and connected to the fourth bevel gear, and a fifth circular gear is fixed to one side of the fourth bevel gear.

[0010] Preferably, the dredging mechanism includes a ring gear, and the ring gear is rotatably connected to the inner wall of the carrying box, the ring gear is meshingly connected to the bottom of the fifth circular gear, and the bottom of the ring gear is connected to the limit ring through a connecting frame, the connecting frame is located between the inner wall of the carrying box and the outer grinding cylinder, the limit ring is rotatably connected to the inner wall of the carrying box, an extrusion plate is fixed on one side of the connecting frame, and a third motor is fixed on the other side of the connecting frame, four wheels are rotatably connected in the connecting frame, the output end of the third motor is connected to one of the wheels, and cutting wires are wound around the outer sides of the four wheels, and the cutting wires pass between the outer grinding cylinder and the inner grinding cylinder.

[0011] Preferably, a fourth belt transmission assembly is fixed to the bottom of the second rotating shaft, a second support plate is fixed to the other side of the carrying box, the fourth belt transmission assembly is rotatably connected to the bottom of the second support plate, and the output end of the fourth belt transmission assembly is connected to the sixth circular gear.

[0012] Preferably, one side of the sixth circular gear is meshingly connected with an auxiliary material transfer mechanism, and the auxiliary material transfer mechanism includes a seventh circular gear, a third rotating shaft is fixed to the top of the seventh circular gear, a fixed frame is fixed to the inner side of the carrying box, the third rotating shaft passes through the fixed frame and is connected to the rotating plate, and a third bracket is fixed to the top of the fixed frame, the top of the third bracket is connected to the movable column through a fourth spring, the movable column passes through the third bracket and is connected to the movable frame, and an arc plate is fixed to one side of the movable frame, and a knocking ball is fixed to the top of the movable column.

[0013] A multi-stage coal grinding method for coal processing comprises the following steps:

[0014] S1. The coal is passed into the bearing box, and the two crushing cylinders rotate relative to each other to grind the coal in a primary manner. At the same time, the pressing plate moves up and down to press the coal repeatedly. When the crushing cylinder rotates, the squeezing rod squeezes the movable plate, and the coal grinding blocks exposed outside the crushing cylinder can be used for coal grinding. When the movable plate is not squeezed by the squeezing rod, the corresponding coal grinding blocks shrink into the crushing cylinder, and the scraping bar automatically scrapes off the coal adhering to the crushing cylinder;

[0015] S2, after the coal enters between the outer grinding cylinder and the inner grinding cylinder, the inner grinding cylinder rotates relative to the outer grinding cylinder to perform secondary grinding on the coal;

[0016] S3, when the connecting frame rotates together with the gear ring, the connecting frame and the extrusion plate will squeeze the first piston, the corresponding second piston will move, the corresponding insertion rod will leave the slot and retract into the side wall of the bearing box, and the remaining insertion rods will continue to support the outer grinding cylinder. While the connecting frame rotates, the four wheels will rotate, the cutting wire will run and fully clear the gap between the inner grinding cylinder and the outer grinding cylinder, and the effect of cutting coal can be achieved. After the connecting frame leaves the first piston, the first piston will automatically reset, and the insertion rod will be inserted back into the slot;

[0017] S4. During the secondary grinding of coal by the inner grinding cylinder, the rotating plate rotates. When the rotating plate squeezes the arc plate and the movable frame, the knocking ball moves down. After the rotating plate leaves the movable frame, the knocking ball automatically bounces up and knocks the inner grinding cylinder, thereby achieving a vibration effect, which is convenient for assisting rapid material transfer.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The multi-stage coal mill for coal processing can achieve the purpose of multi-stage coal grinding and automatic dredging. After the coal is passed into the carrying box, the two crushing cylinders rotate relative to each other, and the use of coal grinding blocks can achieve the effect of primary grinding. Then the coal enters between the outer grinding cylinder and the inner grinding cylinder, and the inner grinding cylinder rotates relative to the outer grinding cylinder, which is convenient for secondary grinding of the coal, making the coal grinding effect more efficient and thorough. At the same time, the gear ring, connecting frame and limit ring can rotate, and the four wheels can rotate together with the connecting frame and can rotate themselves. The cutting wire runs, which is convenient for comprehensive dredging of the annular space between the inner grinding cylinder and the outer grinding cylinder, and can play a role of cutting, which is convenient for more efficient completion of secondary grinding and feeding operations.

[0020] 2. The multi-stage coal mill for coal processing can achieve the purpose of auxiliary pressing. During the primary grinding of coal by two crushing cylinders, the turntable rotates. Since a wavy track is provided on the side of the turntable, the limit frame, the movable frame and the pressing plate can be guided to move back and forth. The pressing plate can repeatedly press the coal downward, which facilitates and better completes the primary grinding operation.

[0021] 3. The multi-stage coal mill for coal processing can achieve the purpose of vibration feeding. During the secondary grinding operation using the inner and outer grinding cylinders, the rotating plate rotates, and the rotating plate will squeeze the arc plate and the movable frame, and the movable column and the knocking ball will move down. After the rotating plate leaves the movable frame, the movable column and the knocking ball will automatically pop up, which is convenient for achieving the vibration effect and allows the coal to better enter between the inner and outer grinding cylinders. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the front view of the three-dimensional structure of the present invention;

[0023] Figure 2 It is a right-side stereoscopic structural schematic diagram of the present invention;

[0024] Figure 3 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0025] Figure 4 It is a right side cross-sectional structural schematic diagram of the present invention;

[0026] Figure 5 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0027] Figure 6 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0028] Figure 7 This is a schematic diagram of the three-dimensional appearance structure of the primary coal grinding mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the three-dimensional cross-sectional structure of the primary coal grinding mechanism of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the dredging mechanism of the present invention;

[0031] Fig.10 It is a schematic diagram of the three-dimensional structure of the auxiliary material transfer mechanism of the present invention;

[0032] Fig.11 It is a schematic diagram of the front cross-sectional structure of the auxiliary material transfer mechanism of the present invention;

[0033] Fig.12 It is a schematic diagram of the connection structure of the bearing box, the first piston, the connection frame and the extrusion plate of the present invention;

[0034] Fig.13 It is a schematic diagram of the connection structure between the outer grinding cylinder and the clamping groove of the present invention.

[0035] In the figure: 1, bearing box; 2, feeding channel; 3, first bracket; 4, first motor; 5, first rotating shaft; 6, pressing mechanism; 601, rotating disk; 602, track; 603, limiting frame; 604, movable frame; 605, first spring; 606, pressing plate; 607, limiting column; 608, stop frame; 7, primary coal grinding mechanism; 701, second motor; 702, first circular gear; 703, second circular gear; 704, crushing cylinder; 705, rotating ring ; 706, scraper; 707, first groove; 708, squeeze rod; 709, second groove; 710, second spring; 711, movable plate; 712, roller; 713, coal grinding block; 8, secondary coal grinding mechanism; 801, airtight passage; 802, first piston; 803, second piston; 804, connecting frame; 805, plug rod; 806, third spring; 807, outer grinding cylinder; 808, slot; 9, first support plate; 10, rotating cylinder; 11, inner Grinding cylinder; 12, first belt transmission assembly; 13, first bevel gear; 14, second bevel gear; 15, second belt transmission assembly; 16, third belt transmission assembly; 17, second rotating shaft; 18, second bracket; 19, third circular gear; 20, fourth circular gear; 21, third bevel gear; 22, fourth bevel gear; 23, fifth circular gear; 24, dredging mechanism; 2401, gear ring; 2402, connecting frame; 2403, limiting ring; 2404, extrusion plate; 2405, the third motor; 2406, the rotating wheel; 2407, the cutting wire; 25, the fourth belt transmission assembly; 26, the second supporting plate; 27, the sixth circular gear; 28, the auxiliary feeding mechanism; 2801, the seventh circular gear; 2802, the third rotating shaft; 2803, the rotating plate; 2804, the fixing frame; 2805, the third bracket; 2806, the fourth spring; 2807, the movable column; 2808, the movable frame; 2809, the arc plate; 2810, the knocking ball. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-13The present invention provides a technical solution: a multi-stage coal mill for coal processing, comprising a bearing box 1, wherein feeding channels 2 are symmetrically provided on both sides of the bearing box 1, a first bracket 3 is fixed on the top of the bearing box 1, a first motor 4 is fixed on the inner top of the first bracket 3, an output end of the first motor 4 faces the bottom and is fixedly connected with a first rotating shaft 5, a pressing mechanism 6 is fixed on the bottom of the first rotating shaft 5, a primary coal grinding mechanism 7 is arranged in the bearing box 1, the primary coal grinding mechanism 7 comprises a second motor 701, a scraper bar 706 and a second spring 710, and the second motor 701 is fixed on one side of the bearing box 1, an output end of the second motor 701 is connected with a first circular gear 702, and a second circular gear 703 is meshedly connected to the front side of the first circular gear 702, and the first circular gear 703 is meshed with the front side of the first circular gear 702. A crushing barrel 704 is fixed on one side of the wheel 702 and one side of the second circular gear 703, and a rotating ring 705 is fixed on one side of the crushing barrel 704. The rotating ring 705 is rotatably connected to an inner wall of the carrying box 1. The front and rear ends of the scraper bar 706 are fixed to the inner wall of the carrying box 1. The crushing barrel 704 and the scraper bar 706 are arranged one by one up and down. The first circular gear 702 can rotate under the action of the second motor 701, thereby driving the second circular gear 703 to rotate. The two crushing barrels 704 rotate relative to each other, which is convenient for the primary grinding operation of the coal. The scraper bar 706 can be used to scrape off the coal adhered to the crushing barrel 704. A first groove 707 is provided in the crushing barrel 704. An extrusion rod 708 is fixed on an inner wall of the carrying box 1. The extrusion rod 708 penetrates One side of the crushing cylinder 704 extends into the first groove 707, a second groove 709 is provided on the outer side of the crushing cylinder 704, and a movable plate 711 is slidably connected in the second groove 709, the bottom of the second spring 710 is fixed in the second groove 709, the top of the second spring 710 is fixed to the top of the movable plate 711, the second spring 710 is sleeved on the outer side of the movable plate 711, a roller 712 is fixed on the inner side of the movable plate 711, and the roller 712 extends into the first groove 707, a coal grinding block 713 is fixed on the outer side of the movable plate 711, and the coal grinding blocks 713 are evenly spaced on the movable plate 711, and the movable plate 711 is evenly distributed on the crushing cylinder 704 in the circumferential direction, and since the extrusion rod 708 is an irregular shape, the upper half of the extrusion rod 708 The radius of the upper part is larger than the radius of the lower part. During the relative rotation of the two crushing cylinders 704, when the roller 712 rolls to the upper part of the squeezing rod 708, the corresponding movable plate 711 will be squeezed by the squeezing rod 708, and the corresponding coal grinding block 713 will be exposed and grind the coal. At this time, the second spring 710 is in an elongated state. When the roller 712 rolls to the lower part of the squeezing rod 708, the corresponding movable plate 711 is not squeezed by the squeezing rod 708, and the second spring 710 is in a contracted state. The corresponding coal grinding block 713 will shrink into the crushing cylinder 704, and the scraper bar 706 can scrape off the excess coal on the surface of the crushing cylinder 704. When the crushing cylinder 704 rotates, the roller 712 rolls, which is convenient for reducing the friction between the crushing cylinder 704 and the squeezing rod 708.

[0038] A secondary coal grinding mechanism 8 is passed through the side of the carrying box 1, a first support plate 9 is fixed in the carrying box 1, a rotating drum 10 is passed through the first support plate 9, an inner grinding drum 11 is fixed on the top of the rotating drum 10, a dredging mechanism 24 is rotatably connected in the carrying box 1, and an auxiliary material passing mechanism 28 is fixed in the carrying box 1, the auxiliary material passing mechanism 28 passes through the rotating drum 10 and extends into the inner grinding drum 11.

[0039] In this embodiment, the pressing mechanism 6 includes a rotating disk 601, and a track 602 is provided on the side of the rotating disk 601. A limited frame 603 is slidably connected in the track 602, and a movable frame 604 is fixed at the bottom of the limited frame 603. The lower side of the movable frame 604 is connected to the pressing plate 606 through a first spring 605, and the pressing plate 606 is a square structure. A limited column 607 is fixed on the upper end surface of the pressing plate 606, and the limited column 607 penetrates the movable frame 604. When the rotating disk 601 rotates, the limited frame 603 slides in the track 602. Since the track 602 is a wavy structure, the height of the track 602 remains unchanged, and the limit frame 603 moves back and forth up and down, thereby driving the movable frame 604 and the pressing plate 606 to move back and forth up and down, which is convenient for repeatedly pressing the coal, so that it can enter between the two crushing cylinders 704 more smoothly and tightly, and the first spring 605 supports the pressing plate 606. The pressing plate 606 and the movable frame 604 can move relatively, which is convenient for better pressing of the coal, and will not cause excessive squeezing when the coal passes between the two crushing cylinders 704 too slowly.

[0040] In this embodiment, the secondary coal grinding mechanism 8 includes an airtight passage 801 and an outer grinding cylinder 807, and the airtight passage 801 is opened in the side wall of the bearing box 1, and the first piston 802 and the second piston 803 are slidably connected in the airtight passage 801, and the outer side of the second piston 803 is fixed with a connecting frame 804, and the connecting frame 804 passes through the side wall of the bearing box 1 and is connected to the insertion rod 805, and the insertion rod 805 is connected to the inner wall of the bearing box 1 through the third spring 806. The outer side of the outer grinding cylinder 807 is provided with a card slot 808, and the insertion rod 80 When the connecting frame 2402 and the extrusion plate 2404 are engaged and connected in the slot 808, and the first piston 802 moves outward, the second piston 803 moves outward under the action of pneumatics, and the connecting frame 804 moves outward accordingly, and the insertion rod 805 moves and leaves the slot 808. At this time, the remaining insertion rods 805 can still support the outer grinding cylinder 807. After the connecting frame 2402 leaves the first piston 802, the insertion rod 805 automatically pops open and snaps back into the slot 808 under the action of the third spring 806.

[0041] In this embodiment, a first belt transmission component 12 is fixed to one side of the second circular gear 703, and the first belt transmission component 12 is rotatably connected to one side of the carrying box 1, the output end of the first belt transmission component 12 is connected to the first bevel gear 13, and the bottom of the first bevel gear 13 is meshingly connected to the second bevel gear 14, a second belt transmission component 15 is fixed to the bottom of the second bevel gear 14, and the second belt transmission component 15 passes through one side of the carrying box 1 and is connected to the rotating drum 10, a third belt transmission component 16 is fixed to the outside of the first rotating shaft 5, and the output end of the third belt transmission component 16 is connected to the second rotating shaft 17, a second bracket 18 is fixed to the top of the carrying box 1, the second rotating shaft 17 is rotatably connected to the second bracket 18, and a third circular gear 19 is fixed to the outside of the second rotating shaft 17, and one side of the third circular gear 19 is meshingly connected to the second rotating shaft 17. The fourth circular gear 20 is connected to the bearing box 1, and the fourth circular gear 20 is rotatably connected to the other side of the bearing box 1. The third bevel gear 21 is fixed on the top of the fourth circular gear 20, and one side of the third bevel gear 21 is meshed and connected with the fourth bevel gear 22, and the fifth circular gear 23 is fixed on one side of the fourth bevel gear 22. The second circular gear 703 rotates to drive the first belt transmission assembly 12 to operate, thereby driving the rotating drum 10 to rotate, and the inner grinding drum 11 rotates relative to the outer grinding drum 807, which is convenient for secondary coal grinding operation. The first rotating shaft 5 rotates to drive the third belt transmission assembly 16 to operate, thereby driving the second rotating shaft 17 to rotate, the third circular gear 19 rotates to drive the fourth circular gear 20 to rotate, the third bevel gear 21 rotates to drive the fourth bevel gear 22 to rotate, and the fifth circular gear 23 rotates to drive the dredging mechanism 24 to rotate, which is convenient for auxiliary dredging and fast material discharge.

[0042] In this embodiment, the dredging mechanism 24 includes a gear ring 2401, and the gear ring 2401 is rotatably connected to the inner wall of the carrying box 1, the gear ring 2401 is meshed and connected to the bottom of the fifth circular gear 23, and the bottom of the gear ring 2401 is connected to the limit ring 2403 through a connecting frame 2402, the connecting frame 2402 is located between the inner wall of the carrying box 1 and the outer grinding cylinder 807, the limit ring 2403 is rotatably connected to the inner wall of the carrying box 1, an extrusion plate 2404 is fixed to one side of the connecting frame 2402, and a third motor 2405 is fixed to the other side of the connecting frame 2402, four rotating wheels 2406 are rotatably connected in the connecting frame 2402, the output end of the third motor 2405 is connected to one of the rotating wheels 2406, and the outer sides of the four rotating wheels 2406 are wound with cutting wires 2407, and the cutting wires 2407 pass through the outer grinding cylinder 807 and the inner grinding cylinder 1 1, the fifth circular gear 23 rotates to drive the ring gear 2401 to rotate, and the connecting frame 2402 and the limiting ring 2403 rotate accordingly. The limiting ring 2403 can play a limiting role. When the connecting frame 2402 rotates, the connecting frame 2402 and the extrusion plate 2404 will squeeze the first piston 802. When the first piston 802 is squeezed and moved, the corresponding second piston 803 moves, and the corresponding insertion rod 805 will retract into the side wall of the carrying box 1 to prevent it from interfering with the rotation of the connecting frame 2402. At the same time, one of the rotating wheels 2406 rotates under the action of the third motor 2405, thereby driving the other three rotating wheels 2406 to rotate. The cutting wire 2407 can rotate with the connecting frame 2402 while shuttling between the outer grinding cylinder 807 and the inner grinding cylinder 11, so as to facilitate the comprehensive and efficient dredging of the feeding channel, achieve the cutting effect, and facilitate auxiliary grinding.

[0043] In this embodiment, a fourth belt transmission assembly 25 is fixed to the bottom of the second rotating shaft 17, and a second support plate 26 is fixed to the other side of the carrying box 1. The fourth belt transmission assembly 25 is rotatably connected to the bottom of the second support plate 26, and the output end of the fourth belt transmission assembly 25 is connected to the sixth circular gear 27. The rotation of the second rotating shaft 17 can drive the fourth belt transmission assembly 25 to operate, thereby driving the sixth circular gear 27 to rotate.

[0044] In this embodiment, one side of the sixth circular gear 27 is meshedly connected with an auxiliary material transfer mechanism 28, and the auxiliary material transfer mechanism 28 includes a seventh circular gear 2801, a third rotating shaft 2802 is fixed to the top of the seventh circular gear 2801, a fixing frame 2804 is fixed to the inner side of the carrying box 1, the third rotating shaft 2802 penetrates the fixing frame 2804 and is connected to the rotating plate 2803, and a third bracket 2805 is fixed to the top of the fixing frame 2804, the top of the third bracket 2805 is connected to the movable column 2807 through a fourth spring 2806, the movable column 2807 penetrates the third bracket 2805 and is connected to the movable frame 2808, and an arc plate 2809 is fixed to one side of the movable frame 2808, and a knocking plate 2809 is fixed to the top of the movable column 2807 The ball 2810, the sixth circular gear 27 rotates to drive the seventh circular gear 2801 to rotate, thereby driving the third rotating shaft 2802 to rotate. During the rotation of the rotating plate 2803, the arc plate 2809 will be squeezed, and the movable frame 2808, the movable column 2807 and the knocking ball 2810 will move down. After the rotating plate 2803 leaves the movable frame 2808, the movable frame 2808, the movable column 2807 and the knocking ball 2810 can automatically bounce up under the action of the fourth spring 2806. The knocking ball 2810 repeatedly knocks the inner grinding cylinder 11, so that the coal can enter between the inner grinding cylinder 11 and the outer grinding cylinder 807 more efficiently. After passing through between the inner grinding cylinder 11 and the outer grinding cylinder 807, the coal falls from the bottom of the carrying box 1, and a collection box can be placed under the carrying box 1 to receive the coal.

[0045] According to another aspect of the present invention, there is provided a multi-stage coal grinding method for coal processing, comprising the following steps:

[0046] S1. The coal is passed into the carrying box 1. The two crushing cylinders 704 rotate relative to each other to grind the coal in a primary manner. At the same time, the pressing plate 606 moves up and down to press the coal repeatedly. When the crushing cylinder 704 rotates, the squeezing rod 708 squeezes the movable plate 711. The coal grinding blocks 713 exposed outside the crushing cylinder 704 can be used for grinding coal. When the movable plate 711 is not squeezed by the squeezing rod 708, the corresponding coal grinding blocks 713 shrink into the crushing cylinder 704. The scraping bar 706 automatically scrapes off the coal adhering to the crushing cylinder 704.

[0047] S2, after the coal enters between the outer grinding cylinder 807 and the inner grinding cylinder 11, the inner grinding cylinder 11 rotates relative to the outer grinding cylinder 807, thereby performing secondary grinding treatment on the coal;

[0048] S3, when the connection frame 2402 rotates together with the gear ring 2401, the connection frame 2402 and the extrusion plate 2404 will squeeze the first piston 802, and the corresponding second piston 803 will move, and the corresponding insertion rod 805 will leave the slot 808 and shrink into the side wall of the carrying box 1, and the remaining insertion rods 805 will continue to support the outer grinding cylinder 807. While the connection frame 2402 rotates, the four wheels 2406 rotate, and the cutting wire 2407 runs and fully clears the gap between the inner grinding cylinder 11 and the outer grinding cylinder 807, and the effect of cutting coal can be achieved. After the connection frame 2402 leaves the first piston 802, the first piston 802 automatically resets, and the insertion rod 805 is inserted back into the slot 808;

[0049] S4. During the secondary grinding of coal by the inner grinding cylinder 11, the rotating plate 2803 rotates. When the rotating plate 2803 squeezes the arc plate 2809 and the movable frame 2808, the knocking ball 2810 moves downward. After the rotating plate 2803 leaves the movable frame 2808, the knocking ball 2810 automatically pops up and knocks the inner grinding cylinder 11, thereby achieving a vibration effect, which is convenient for assisting rapid material transfer.

[0050] The working principle of the device is as follows: first, the coal is passed into the feed channel 2, and the coal enters between the two crushing cylinders 704. The two crushing cylinders 704 rotate relative to each other, and the coal grinding block 713 is used to perform primary grinding on the coal. At the same time, the first rotating shaft 5 and the turntable 601 rotate, the limit frame 603 slides in the track 602, and the movable frame 604 and the pressing plate 606 move up and down to repeatedly press the coal downward. The pressing plate 606 and the movable frame 604 can move relative to each other to avoid excessive pressing. During the downward movement of the pressing plate 606, the baffle frame 608 will seal the feed channel 2. When the crushing cylinder 704 rotates, the squeezing rod 708 will squeeze the movable plate 711, and the corresponding coal grinding block 713 will be exposed and grind the coal. The movable plate 711 When the turntable 601 reaches the bottom, it is not squeezed by the squeezing rod 708. The movable plate 711 and the coal grinding block 713 are retracted into the crushing cylinder 704 under the action of the second spring 710. The scraper bar 706 can scrape off the coal adhering to the crushing cylinder 704. The coal after primary grinding enters between the outer grinding cylinder 807 and the inner grinding cylinder 11. The second circular gear 703 rotates to drive the first belt transmission assembly 12, the first bevel gear 13, the second bevel gear 14, the second belt transmission assembly 15, the rotating cylinder 10 and the inner grinding cylinder 11 to rotate. The inner grinding cylinder 11 rotates relative to the outer grinding cylinder 807 to grind the coal for this secondary grinding. At the same time, the first rotating shaft 5 rotates to drive the third belt transmission assembly 16, the second rotating shaft 17, the fourth belt transmission assembly 25 and the sixth circular gear 27 to rotate. The seventh circular gear 2801, the third rotating shaft 2802 and the rotating plate 2803 rotate. During the rotation of the rotating plate 2803, the arc plate 2809 is squeezed, and the arc plate 2809, the movable frame 2808, the movable column 2807 and the knocking ball 2810 move downward. After the rotating plate 2803 leaves the movable frame 2808, the movable frame 2808, the movable column 2807 and the knocking ball 2810 automatically pop up, thereby achieving the effect of auxiliary vibration, so that the coal can enter between the outer grinding cylinder 807 and the inner grinding cylinder 11 more efficiently, and the insertion rod 805 supports the outer grinding cylinder 807. The rotation of the second rotating shaft 17 drives the third circular gear 19, the fourth circular gear 20, the third bevel gear 21, the fourth bevel gear 22 and the fifth circular gear 23 to rotate, thereby driving the ring gear 240 1 rotates, the connecting frame 2402 and the limiting ring 2403 rotate, when the extrusion plate 2404 squeezes the first piston 802, the corresponding second piston 803 moves, and the corresponding insertion rod 805 leaves the card slot 808 and retracts into the side wall of the carrying box 1. The four wheels 2406 can rotate while the connecting frame 2402 rotates, thereby guiding the cutting wire 2407 to rotate, so as to fully dredge the annular space between the outer grinding cylinder 807 and the inner grinding cylinder 11, and the effect of cutting coal can be achieved. The connecting frame 2402 leaves the first piston 802, the first piston 802 automatically resets, and the insertion rod 805 bounces into the card slot 808 to support the outer grinding cylinder 807. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0051] In summary, the multi-stage coal mill and method for coal processing achieve the purposes of multi-stage coal grinding, automatic dredging, auxiliary pressing and vibration material passing, and meet people's use needs.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-stage coal mill for coal processing, comprising a bearing box (1), characterized in that: The two sides of the carrying box (1) are symmetrically provided with feeding channels (2); a first bracket (3) is fixed on the top of the carrying box (1); a first motor (4) is fixed on the inner top of the first bracket (3); an output end of the first motor (4) faces the bottom and is fixedly connected to a first rotating shaft (5); a pressing mechanism (6) is fixed on the bottom of the first rotating shaft (5); a primary coal grinding mechanism (7) is arranged in the carrying box (1); the primary coal grinding mechanism (7) comprises a second motor (701), a scraper bar (706) and a second spring (710); and the first motor (701) is provided with a first motor (706), a second motor (710), a first motor (706), a second motor (710), and a first motor (706) is provided on the inner top of the first bracket (3); an output end of the first motor (4) faces the bottom and is fixedly connected to a first rotating shaft (5); a pressing mechanism (6) is fixed on the bottom of the first rotating shaft (5); a primary coal grinding mechanism (7) is arranged in the carrying box (1); the primary coal grinding mechanism (7) comprises a second motor (701), a scraper bar (706) and a second spring (710); and The second motor (701) is fixed on one side of the carrying box (1), the output end of the second motor (701) is connected to the first circular gear (702), and the front side of the first circular gear (702) is meshedly connected to the second circular gear (703), a crushing cylinder (704) is fixed on one side of the first circular gear (702) and one side of the second circular gear (703), and a rotating ring (705) is fixed on one side of the crushing cylinder (704), the rotating ring (705) is rotatably connected to an inner wall of the carrying box (1), and the front and rear ends of the scraper (706) are fixed on On the inner wall of the carrying box (1), the crushing cylinder (704) and the scraping strip (706) are arranged one by one in upper and lower correspondence, a first groove (707) is provided in the crushing cylinder (704), an extrusion rod (708) is fixed on an inner wall of the carrying box (1), the extrusion rod (708) passes through one side of the crushing cylinder (704) and extends into the first groove (707), a second groove (709) is provided on the outer side of the crushing cylinder (704), and a movable plate (711) is slidably connected in the second groove (709), and the bottom of the second spring (710) is fixed The movable plate (711) is fixed in the second groove (709); the top of the second spring (710) is fixed to the top of the movable plate (711); the second spring (710) is sleeved on the outer side of the movable plate (711); a roller (712) is fixed on the inner side of the movable plate (711); the roller (712) extends into the first groove (707); a coal grinding block (713) is fixed on the outer side of the movable plate (711); the coal grinding blocks (713) are evenly spaced on the movable plate (711); and the movable plate (711) is evenly distributed on the pulverizing cylinder (704) in the circumferential direction; A secondary coal grinding mechanism (8) is passed through the side of the bearing box (1); a first support plate (9) is fixed inside the bearing box (1); a rotating drum (10) is passed through the first support plate (9); an inner grinding drum (11) is fixed to the top of the rotating drum (10); a dredging mechanism (24) is rotatably connected inside the bearing box (1); an auxiliary material passing mechanism (28) is fixed inside the bearing box (1); the auxiliary material passing mechanism (28) passes through the rotating drum (10) and extends into the inner grinding drum (11); The secondary coal grinding mechanism (8) comprises an airtight passage (801) and an outer grinding cylinder (807), and the airtight passage (801) is provided in the side wall of the bearing box (1), a first piston (802) and a second piston (803) are slidably connected in the airtight passage (801), a connecting frame (804) is fixed to the outer side of the second piston (803), and the connecting frame (804) passes through the side wall of the bearing box (1) and is connected to an insertion rod (805), the insertion rod (805) is connected to the inner wall of the bearing box (1) via a third spring (806), a slot (808) is provided on the outer side of the outer grinding cylinder (807), and the insertion rod (805) is engaged and connected in the slot (808); A first belt transmission component (12) is fixed to one side of the second circular gear (703), and the first belt transmission component (12) is rotatably connected to one side of the carrying box (1); an output end of the first belt transmission component (12) is connected to a first bevel gear (13), and the bottom of the first bevel gear (13) is meshingly connected to a second bevel gear (14); a second belt transmission component (15) is fixed to the bottom of the second bevel gear (14), and the second belt transmission component (15) passes through one side of the carrying box (1) and is connected to the rotating drum (10); a third belt transmission component (16) is fixed to the outer side of the first rotating shaft (5), and the output end of the third belt transmission component (16) is connected to the first bevel gear (13); connected to the second rotating shaft (17), a second bracket (18) is fixed on the top of the carrying box (1), the second rotating shaft (17) is rotatably connected to the second bracket (18), a third circular gear (19) is fixed on the outer side of the second rotating shaft (17), one side of the third circular gear (19) is meshingly connected to a fourth circular gear (20), and the fourth circular gear (20) is rotatably connected to the other side of the carrying box (1), a third bevel gear (21) is fixed on the top of the fourth circular gear (20), one side of the third bevel gear (21) is meshingly connected to a fourth bevel gear (22), and a fifth circular gear (23) is fixed on one side of the fourth bevel gear (22); The dredging mechanism (24) comprises a gear ring (2401), and the gear ring (2401) is rotatably connected to the inner wall of the carrying box (1), the gear ring (2401) is meshedly connected to the bottom of the fifth circular gear (23), and the bottom of the gear ring (2401) is connected to a limiting ring (2403) via a connecting frame (2402), the connecting frame (2402) is located between the inner wall of the carrying box (1) and the outer grinding cylinder (807), and the limiting ring (2403) is rotatably connected to the inner wall of the carrying box (1). An extrusion plate (2404) is fixed on one side of the connection frame (2402), and a third motor (2405) is fixed on the other side of the connection frame (2402). Four rotating wheels (2406) are rotatably connected inside the connection frame (2402), an output end of the third motor (2405) is connected to one of the rotating wheels (2406), and cutting wires (2407) are wound around the outer sides of the four rotating wheels (2406), and the cutting wires (2407) pass between the outer grinding cylinder (807) and the inner grinding cylinder (11).

2. A multi-stage coal mill for coal processing according to claim 1, characterized in that: The pressing mechanism (6) comprises a rotating disk (601), and a track (602) is provided on the side of the rotating disk (601), a limiting frame (603) is slidably connected inside the track (602), and a movable frame (604) is fixed at the bottom of the limiting frame (603), the lower side of the movable frame (604) is connected to a pressing plate (606) via a first spring (605), and the pressing plate (606) is a square structure, and a limiting column (607) is fixed on the upper end surface of the pressing plate (606), and the limiting column (607) passes through the movable frame (604).

3. A multi-stage coal mill for coal processing according to claim 2, characterized in that: A fourth belt transmission assembly (25) is fixed to the bottom of the second rotating shaft (17), a second support plate (26) is fixed to the other side of the carrying box (1), the fourth belt transmission assembly (25) is rotatably connected to the bottom of the second support plate (26), and an output end of the fourth belt transmission assembly (25) is connected to a sixth circular gear (27).

4. A multi-stage coal mill for coal processing according to claim 3, characterized in that: One side of the sixth circular gear (27) is meshedly connected with an auxiliary material transfer mechanism (28), and the auxiliary material transfer mechanism (28) comprises a seventh circular gear (2801), a third rotating shaft (2802) is fixed to the top of the seventh circular gear (2801), a fixing frame (2804) is fixed to the inner side of the carrying box (1), the third rotating shaft (2802) passes through the fixing frame (2804) and is connected to the rotating plate (2803), and a third bracket (2805) is fixed to the top of the fixing frame (2804), the top of the third bracket (2805) is connected to a movable column (2807) via a fourth spring (2806), the movable column (2807) passes through the third bracket (2805) and is connected to a movable frame (2808), and an arc plate (2809) is fixed to one side of the movable frame (2808), and a knocking ball (2810) is fixed to the top of the movable column (2807).

5. A multi-stage coal grinding method for coal processing, applied to the multi-stage coal grinding machine for coal processing according to claim 4, characterized in that: The following steps are involved: S1. The coal is passed into the carrying box (1), and the two crushing cylinders (704) rotate relative to each other to perform primary grinding on the coal. At the same time, the pressing plate (606) moves up and down to press the coal repeatedly. When the crushing cylinder (704) rotates, the squeezing rod (708) squeezes the movable plate (711), and the coal grinding blocks (713) exposed outside the crushing cylinder (704) can be used for grinding the coal. When the movable plate (711) is not squeezed by the squeezing rod (708), the corresponding coal grinding blocks (713) shrink into the crushing cylinder (704), and the scraping bar (706) automatically scrapes off the coal adhering to the crushing cylinder (704); S2, after the coal enters between the outer grinding cylinder (807) and the inner grinding cylinder (11), the inner grinding cylinder (11) rotates relative to the outer grinding cylinder (807), thereby performing secondary grinding on the coal; S3, when the connection frame (2402) rotates together with the gear ring (2401), the connection frame (2402) and the extrusion plate (2404) will squeeze the first piston (802), the corresponding second piston (803) will move, the corresponding insertion rod (805) will leave the slot (808) and retract into the side wall of the bearing box (1), and the remaining insertion rods (805) will continue to support the outer grinding cylinder (807). While the connection frame (2402) rotates, the four wheels (2406) rotate, the cutting wire (2407) runs and fully clears the gap between the inner grinding cylinder (11) and the outer grinding cylinder (807), and the effect of cutting coal can be achieved. After the connection frame (2402) leaves the first piston (802), the first piston (802) automatically resets, and the insertion rod (805) is inserted back into the slot (808); S4. During the process of secondary grinding of coal by the inner grinding cylinder (11), the rotating plate (2803) rotates. When the rotating plate (2803) squeezes the arc plate (2809) and the movable frame (2808), the knocking ball (2810) moves downward. After the rotating plate (2803) leaves the movable frame (2808), the knocking ball (2810) automatically bounces up and knocks the inner grinding cylinder (11), thereby achieving a vibration effect and facilitating rapid material feeding.

Images