Multi-stage pulverized coal preparation unit

Abstract

This disclosure pertains to the field of coal mine processing and discloses a multi-stage pulverized coal preparation device, comprising a washing cylinder with an open upper end. A first circular plate is positioned directly below the washing cylinder, and multiple evenly distributed support columns are provided on the upper surface of the first circular plate. The support columns are all fixedly connected to the bottom of the washing cylinder. Multiple first discharge ports are symmetrically placed on the peripheral wall of the washing cylinder. A coaxially placed circular ring plate is fitted onto the washing cylinder, with the inner peripheral wall of the ring plate fitting against the outer peripheral wall of the washing cylinder. Multiple evenly distributed through-hole grooves are provided on the peripheral wall of the ring plate, and the through-hole grooves are inclined and staggered along the peripheral wall of the ring plate. The size of each through-hole groove is equal to that of the first discharge ports. The device performs multi-stage washing and coal preparation operations on a coal mixture, continuously separating coal and gangue suspended in the heavy suspension, improving the separation effect of coal and gangue in the coal mixture, and bringing the pure coal and gangue in the coal mine closer to a fully separated state, thus reducing the waste of pure coal.

Description

Technical Field

[0001] This disclosure pertains to the field of coal mine processing, specifically relating to a multi-stage pulverized coal preparation device. Background Technology

[0002] Pulverized coal injection in blast furnaces is a widely adopted new technology in modern blast furnace ironmaking and an indispensable means of regulating the furnace conditions. Pulverized coal injection is beneficial for reducing the coke ratio, reducing pig iron costs, improving the blast furnace smelting process, and thus further improving various technical and economic indicators of the blast furnace. Pulverized coal injection in blast furnaces has certain quality requirements: low ash and sulfur content, high calorific value, good grindability, combustibility, and conveying performance, low explosiveness, and good reactivity. Therefore, coal raw materials used for pulverized coal injection need to undergo a coal preparation process to reduce impurities such as gangue and improve coal purity. One existing coal preparation method involves washing and beneficiating coal through a heavy suspension. After mixing the coal with the heavy suspension, the heavier gangue in the coal mine sinks to the bottom of the heavy suspension, while the gangue-containing coal remains suspended in the heavy suspension, and the pure coal floats on the surface. By screening and collecting the pure coal floating on the surface of the heavy suspension, coal preparation is achieved. However, since the gangue coal suspended in the heavy suspension still contains a large amount of coal, the existing technology suffers from insufficient coal washing and beneficiation, resulting in a large waste of pure coal. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this disclosure is to provide a multi-stage pulverized coal preparation device, which solves the problem of insufficient coal washing and preparation in the prior art, resulting in a large waste of pure coal.

[0004] The objective of this disclosure can be achieved through the following technical solutions:

[0005] A multi-stage pulverized coal preparation device includes a washing cylinder with an open upper end. A first circular plate is located directly below the washing cylinder, and multiple evenly distributed support columns are located on the upper surface of the first circular plate. The support columns are all fixedly connected to the bottom of the washing cylinder. Multiple first discharge ports are symmetrically placed on the periphery of the washing cylinder. A coaxially placed circular ring plate is fitted on the washing cylinder, with the inner periphery of the ring plate fitting against the outer periphery of the washing cylinder. Multiple evenly distributed through-hole slots are located on the periphery of the ring plate, and the through-hole slots are placed in an inclined and staggered manner along the periphery of the ring plate. The size of each through-hole slot is equal to that of the first discharge port. Each through-hole slot corresponds to a first discharge port, and when any through-hole slot coincides with the first discharge port at its corresponding height, the remaining through-hole slots are completely staggered from the first discharge ports at their corresponding heights.

[0006] A rotating motor is fixedly installed on the first circular plate. The output end of the rotating motor is provided with a first rotating shaft. The first rotating shaft is placed coaxially with the washing and screening cylinder. The first rotating shaft passes through the lower end face of the washing and screening cylinder and is rotatably connected to the washing and screening cylinder. A skimming mechanism is sleeved on the first rotating shaft. A slot is provided on the circumferential side wall of the first rotating shaft, which is placed coaxially. The skimming mechanism can slide up and down along the slot.

[0007] The washing and screening cylinder is equipped with a rotating ring placed coaxially. The rotating ring is located near the bottom of the washing and screening cylinder. The outer wall of the rotating ring is rotatably engaged with the inner wall of the washing and screening cylinder. The rotating ring is equipped with multiple connecting strips that are evenly distributed in a ring about the central axis of the first rotating shaft. One end of each connecting strip is fixed to the first rotating shaft, and the other end of each connecting strip is fixed to the inner wall of the rotating ring. Each connecting strip has a groove placed coaxially. Each groove has a sliding block that is slidably engaged. Each groove also has a threaded rod placed coaxially. One end of each threaded rod is rotatably connected to the rotating ring. Each threaded rod passes through the first slider and is threadedly connected to the first slider. Each first slider has a vertically upward-placed connecting rod, and each connecting rod has a coaxially placed crushing plate fixedly connected to it.

[0008] The bottom of the washing and screening cylinder is shaped like a frustum, and the diameter of the lower end of the frustum is smaller than the diameter of the upper end. The bottom of the washing and screening cylinder is provided with a second discharge port, and a valve plate is provided on the second discharge port.

[0009] The skimming mechanism includes a float, which is sleeved on a first rotating shaft and slidably engaged with a slot. The float is symmetrically positioned about the central axis of the first rotating shaft. Mounting plates are fixedly connected to both ends of the float. A dual-axis rotating motor is fixedly mounted on one side of the upper end of the float near the middle section via a fixing block. Each output end of the dual-axis rotating motor is provided with a second threaded rod, which is perpendicular to the float. One end of each second threaded rod is rotatably connected to a mounting plate. A sliding rod is fixedly connected between the two mounting plates. The sliding rod and the second threaded rod are placed coaxially. A second slider is threadedly connected to each second threaded rod, and the second slider is slidably connected to the sliding rod. A pair of symmetrically placed push plates are fixedly connected to the lower end of each second slider. The push plates are located on both sides of the float parallel to the slide rod.

[0010] A sleeve is provided between the connecting strip and the first rotating shaft. The sleeve and the first rotating shaft are placed on the same axis. The inner diameter of the sleeve is larger than the diameter of the first rotating shaft. The upper end of the sleeve is sealed. The first rotating shaft passes through the sleeve and is rotatably connected to the sleeve. The end of the first threaded rod near the first rotating shaft passes through the circumferential wall of the sleeve. The first threaded rod is rotatably connected to the circumferential wall of the sleeve. A gear plate placed on the same axis is fixedly sleeved on the first threaded rod. The gear plate is located inside the sleeve. A first gear placed on the same axis is fixedly sleeved on the first rotating shaft. The first gear is meshed with the gear plate.

[0011] Multiple circular through holes are evenly distributed in a ring around the central axis of the sleeve on the peripheral side wall. A telescopic cylinder is fixedly installed on the peripheral side wall of the first rotating shaft. The telescopic cylinder is located inside the sleeve, and the telescopic rod of the telescopic cylinder can be inserted into any of the circular through holes.

[0012] The upper surface of the slide groove is provided with corrugated strips that can be slidably engaged. The corrugated strips can slide along the slide groove. The corrugated strips near the sleeve end are fixedly connected to the sleeve, and the corrugated strips near the rotating ring end are fixedly connected to the rotating ring. The corrugated strips can be extended and folded along the axis of the first threaded rod. The first slider is located below the corrugated strips, and the connecting rod passes through the corrugated strips.

[0013] A first screen plate is fixedly connected to the side wall of the washing cylinder near the lower end. The first screen plate is located below the first discharge port at the bottom of the washing cylinder. The first screen plate is fan-shaped and ring-shaped. The inner side wall of the first screen plate is fixedly connected to the side wall of the washing cylinder. A collection box is fixedly connected to the side wall of the washing cylinder. The collection box is a fan-shaped ring-shaped shell box. The collection box and the first screen plate are placed on the same axis. The diameter of the outer circle of the collection box is equal to the diameter of the outer circle of the first screen plate. The upper end face of the collection box and the upper end face of the first screen plate are in the same height plane, and the upper end face of the collection box and the upper end face of the first screen plate complement each other to form a complete ring.

[0014] The first screen plate is provided with a pusher bar, which can rotate around the central axis of the first rotating shaft along the upper surface of the first screen plate. The side of the pusher bar away from the washing cylinder is provided with an arc plate. The inner side wall of the arc plate is in contact with the outer peripheral wall of the first screen plate. The arc plate can rotate around the central axis of the first rotating shaft along the outer peripheral wall of the first screen plate. An ear plate is fixedly connected to the outer side wall of the arc plate. A first connecting piece placed vertically downward is fixedly connected to the lower end of the ear plate.

[0015] A second circular plate is located directly below the first circular plate. A second rotating shaft is rotatably connected to the second circular plate. The second rotating shaft is placed coaxially with the first rotating shaft. The upper end of the second rotating shaft is rotatably connected to the lower end face of the first circular plate. A second connecting piece is fixedly sleeved on the second rotating shaft. The second connecting piece is placed horizontally. The end of the second connecting piece away from the second rotating shaft is fixedly connected to the lower end of the first connecting piece.

[0016] A pair of toothed gears, placed parallel to each other, are mounted on the first rotating shaft. The toothed gears are located directly below the collection box. A third rotating shaft is mounted on the first circular plate. The third rotating shaft is placed coaxially with the second rotating shaft. The third rotating shaft passes through the first circular plate and is rotatably connected to the first circular plate. A gear post, placed coaxially, is fixedly mounted on the upper end of the third rotating shaft. Both toothed gears can mesh with the gear post. The meshing of the two toothed gears with the gear post is alternating. The two toothed gears do not mesh with the gear post at the same time.

[0017] Any one of the missing teeth gears is fixedly connected to the first rotating shaft, and the other missing tooth gear is rotatably connected to the first rotating shaft. On the side surfaces of the missing tooth gears that are close to each other, there are coaxially placed gear rings. A mounting component is fixedly provided on the first circular plate, and a fourth rotating shaft is fixedly connected to the mounting component. The fourth rotating shaft is placed perpendicular to the first rotating shaft and is perpendicular to the central axis of the first rotating shaft. A second gear is rotatably connected on the fourth rotating shaft. The second gear is located between the two gear rings and meshes with both gear rings.

[0018] A third gear, coaxially placed, is fixedly sleeved at the lower end of the third shaft, and a fourth gear is fixedly sleeved on the second shaft.

[0019] A first liquid storage tank is fixedly connected to the lower end of the first sieve plate. The upper end of the first liquid storage tank is open. A second liquid storage tank is placed coaxially below the washing cylinder. A first rotating shaft passes through the second liquid storage tank and is rotatably connected to the second liquid storage tank. The upper end of the second liquid storage tank is open. A second sieve plate is fixedly connected to the upper end of the second liquid storage tank. A first conduit connects the first liquid storage tank and the second liquid storage tank. The first liquid storage tank and the second liquid storage tank are connected through the first conduit. A water pump is installed in the second liquid storage tank. A second conduit is installed at the output end of the water pump. The other end of the second conduit is connected through the lower end of the washing cylinder.

[0020] A rotating bar is fixedly sleeved on the first rotating shaft. The rotating bar is located on the upper surface of the second screen plate and can rotate along the surface of the second screen plate.

[0021] The beneficial effects of this disclosure are:

[0022] 1. This invention utilizes a washing and screening cylinder, a first discharge port, a second discharge port, and a skimming mechanism to perform multi-stage washing and coal preparation operations on coal mixtures. This continuously separates coal from gangue in the heavy suspension, improving the separation effect of coal and gangue in the coal mixture. This allows pure coal and gangue in the coal mine to approach a degree of complete separation, reducing the waste of pure coal.

[0023] 2. The present invention can automatically adjust the position of the crushing plate through the cooperation of the first threaded rod, the first slider, the slide groove, the connecting rod, the crushing plate, the toothed disc, and the first gear. By adjusting the position of the crushing plate and coordinating with the rotation of the rotating motor and the first rotating shaft, the crushing plate can crush the gangue-containing coal suspended in the heavy suspension, which is convenient for further coal washing and beneficiation. At the same time, by adjusting the position of the crushing plate, sufficient rotation space can be provided for the skimming mechanism to operate, which is convenient for the multi-stage pulverized coal preparation device to perform multiple coal washing and beneficiation operations.

[0024] 3. The present invention uses a toothed gear, a gear column, a gear ring, a second gear, a third gear, a fourth gear, a first connector, a second connector, an ear plate, an arc plate, and a push bar to realize the push bar reciprocating rotation around the central axis of the first screen plate, which facilitates the automatic pushing of the pure coal filtered on the first screen plate into the collection box for collection.

[0025] 4. The present invention achieves repeated recycling of heavy suspension through the cooperation of a first liquid storage tank, a second liquid storage tank, a first conduit, a second conduit, and a water pump. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 These are schematic diagrams of the invention from different perspectives;

[0029] Figure 3 This is a partial structural schematic diagram of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the second circular plate and gear column of the present invention;

[0031] Figure 5 It is shown in the accompanying drawings of this invention. Figure 4 A magnified schematic diagram of the structure at point A;

[0032] Figure 6 This is a schematic diagram of the internal structure of the washing and screening cylinder of the present invention;

[0033] Figure 7 This is a schematic diagram of the rotating ring structure of the present invention;

[0034] Figure 8 This is a schematic diagram of the skimming mechanism of the present invention;

[0035] Figure 9 This is a schematic diagram of the connecting strip and sleeve structure of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0037] like Figures 1 to 9 As shown, a multi-stage pulverized coal preparation device includes a washing cylinder 1000 with an open upper end. A first circular plate 2 is positioned directly below the washing cylinder 1000. Multiple evenly distributed support columns 3 are located on the upper surface of the first circular plate 2, and all support columns 3 are fixedly connected to the bottom of the washing cylinder 1000. Multiple first discharge ports 1001, symmetrically arranged vertically, are opened on the peripheral wall of the washing cylinder 1000. A coaxially placed circular ring plate 4 is fitted onto the washing cylinder 1000, and the inner peripheral wall of the circular ring plate 4 is aligned with... The outer wall of the washing and screening cylinder 1000 is attached, and multiple evenly distributed through-hole grooves 41 are opened on the four sides of the annular plate. The multiple through-hole grooves 41 are placed in an inclined and staggered state along the four sides of the annular plate. The size of the through-hole grooves 41 is equal to that of the first discharge port 1001. The through-hole grooves 41 correspond one-to-one with the first discharge port 1001. When any through-hole groove 41 coincides with the first discharge port 1001 at the corresponding position height, the other through-hole grooves 41 are completely staggered from the first discharge port 1001 at the corresponding position height.

[0038] A rotating motor 5 is fixedly installed on the first circular plate 2. The output end of the rotating motor 5 is provided with a first rotating shaft 51. The first rotating shaft 51 is placed coaxially with the washing and selection cylinder 1000. The first rotating shaft 51 passes through the lower end face of the washing and selection cylinder 1000 and is rotatably connected to the washing and selection cylinder 1000. A skimming mechanism 6 is sleeved on the first rotating shaft 51. A slot is provided on the side wall of the first rotating shaft 51, which is placed coaxially. The skimming mechanism 6 can slide up and down along the slot.

[0039] The washing and screening cylinder 1000 is provided with a rotating ring 7 placed coaxially. The rotating ring 7 is located near the bottom of the washing and screening cylinder 1000. The outer wall of the rotating ring 7 is rotatably engaged with the inner wall of the washing and screening cylinder 1000. The rotating ring 7 is provided with a plurality of connecting strips 8 evenly distributed in a ring about the central axis of the first rotating shaft 51. One end of each connecting strip 8 is fixed to the first rotating shaft 51, and the other end of each connecting strip 8 is fixed to the inner wall of the rotating ring 7. Each connecting strip 8 is provided with a sliding groove 81 placed coaxially. Each sliding groove 81 is provided with a slidingly engaged first slider 82. Each sliding groove 81 is provided with a first threaded rod 83 placed coaxially. One end of each first threaded rod 83 is rotatably connected to the rotating ring 7. Each first threaded rod 83 passes through the first slider 82 and is threadedly connected to the first slider 82. Each first slider 82 is fixed with a vertically upward-placed connecting rod. Each connecting rod is fixedly connected with a crushing plate 84 placed coaxially.

[0040] The bottom of the washing and screening cylinder 1000 is shaped like a frustum, and the diameter of the lower end of the frustum is smaller than the diameter of the upper end. The bottom of the washing and screening cylinder 1000 is provided with a second discharge port, and a valve plate is provided on the second discharge port.

[0041] The coal mixture is poured into the washing and screening cylinder 1000, and a heavy suspension is injected into the washing and screening cylinder 1000. The skimming mechanism 6 always floats on the surface of the heavy suspension. At this time, the heavier gangue in the coal mine sinks to the lower end of the washing and screening cylinder 1000, the gangue-containing coal is suspended in the heavy suspension, and the pure coal floats on the heavy suspension.

[0042] Rotate the first threaded rod 83 to move the first slider 82 along the slide groove 81. The first slider 82 drives the connecting rod and the crushing plate 84 to move to one end away from the central axis of the first rotating shaft 51, leaving enough space for the skimming mechanism 6 to work. Open the valve plate to discharge the gangue settled at the bottom of the washing cylinder 1000 through the second discharge port. During the discharge of gangue, the level of the heavy suspension drops. After the level of the heavy suspension drops to be level with the uppermost first discharge port 1001, close the valve plate. Rotate the annular plate 4 to move the uppermost first discharge port 1001 in the washing cylinder 1000. 001 is turned on, and then the rotating motor 5 is turned on. The output end of the rotating motor 5 drives the first rotating shaft 51. The first rotating shaft 51 drives the skimming mechanism 6 to rotate around the central axis of the first rotating shaft 51, so that the skimming mechanism 6 collects the pure coal floating on the surface of the heavy suspension. When the skimming mechanism 6 rotates to be placed in the same direction as the first discharge port 1001, the collected pure coal is pushed out to the first discharge port 1001 through the skimming mechanism 6. After multiple rotations to collect and push out, the pure coal floating on the surface of the heavy suspension is initially discharged and separated, realizing the first stage of coal washing and selection.

[0043] After one round of coal washing and preparation, the first threaded rod 83 is rotated, and the first threaded rod 83 engages with the first slider 82 through threaded gear transmission. This causes the first slider 82 to move a certain distance along the slide groove 81 towards the central axis of the first rotating shaft 51. Then, the rotating motor 5 is restarted. The output of the rotating motor 5 drives the first rotating shaft 51, which in turn drives the connecting bar 8, the first threaded rod 83, the first slider 82, the connecting rod, and the crushing plate 84. This causes the crushing plate 84 to rotate within the washing cylinder 1000, crushing coal containing a small amount of gangue. By repeatedly adjusting the positions of the first slider 82, the connecting rod, and the crushing plate 84, coal containing a small amount of gangue in various parts of the washing cylinder 1000 is crushed. Then, the first threaded rod 83 is rotated again... A threaded rod 83 moves the first slider 82, connecting rod, and crushing plate 84 to an end away from the central axis of the first rotating shaft 51; then the valve plate is opened to release the gangue that has settled at the bottom. After the level of the heavy suspension drops to be level with the next first discharge port 1001, the valve plate is closed; then the first-stage coal washing and beneficiation process is repeated to carry out the second-stage coal washing and beneficiation process; each first discharge port 1001 is opened in sequence, and the above process is repeated multiple times to carry out multi-stage coal washing and beneficiation operations on the coal mixture, continuously separating the coal and gangue suspended in the heavy suspension, improving the separation effect of coal and gangue in the coal mixture, and making the pure coal and gangue in the coal mine continuously approach the degree of complete separation, reducing the waste of pure coal.

[0044] To facilitate the skimming and separation of pure coal floating on heavy suspension, the skimming mechanism 6 includes floats 61, which are sleeved on the first rotating shaft 51 and slidably engaged with slots. The floats 61 are symmetrically positioned about the central axis of the first rotating shaft 51. Mounting plates 62 are fixedly connected to both ends of the floats 61. A dual-axis rotating motor 63 is fixedly mounted on one side of the upper end of the float 61 near the middle section via a fixing block. Each output end of the dual-axis rotating motor 63 is equipped with a second threaded rod 64. Both threaded rods 64 are placed perpendicular to the float 61. One end of each threaded rod 64 is rotatably connected to the mounting plate 62. A sliding rod 65 is fixedly connected between the two mounting plates 62. The sliding rod 65 and the threaded rod 64 are placed coaxially. A second slider 66 is threadedly connected to each threaded rod 64. The second slider 66 is slidably connected to the sliding rod 65. A pair of symmetrically placed push plates 67 are fixedly connected to the lower end of each second slider 66. The push plates 67 are located on both sides of the float 61 parallel to the sliding rod 65.

[0045] When it is necessary to collect, discharge, and separate the pure coal floating on the heavy suspension, the rotary motor 5 is turned on. The output end of the rotary motor 5 drives the first rotating shaft 51, which in turn drives the float 61. The float 61 rotates around the central axis of the first rotating shaft 51 on the surface of the heavy suspension. During the rotation of the float 61, the floating pure coal is collected and gathered on both sides of the float 61. When the float 61 rotates to be placed coaxially with the first discharge port 1001, the dual-shaft rotary motor 63 is turned on. The output end of the dual-shaft rotary motor 63 drives the second threaded rod 64, which in turn drives the second slider 66. The second slider 66 drives the push plate 67, causing the push plate 67 near the first discharge port 1001 to move towards the discharge port. The push plate 67 pushes the heavy suspension and carries the pure coal away from the first discharge port 1001 for separation and discharge, thus facilitating the skimming and separation of the pure coal floating on the heavy suspension.

[0046] Before the pulverizing heavy suspension containing gangue coal and the skimming mechanism 6 collects pure coal, the position of the first slider 82 needs to be adjusted. To facilitate automatic control of the position adjustment of the first slider 82, a sleeve 9 is provided between the connecting bar 8 and the first rotating shaft 51. The sleeve 9 and the first rotating shaft 51 are placed coaxially. The inner diameter of the sleeve 9 is larger than the diameter of the first rotating shaft 51. The upper end of the sleeve 9 is sealed. The first rotating shaft 51 passes through the sleeve 9 and is rotatably connected to the sleeve 9. The ends of the first threaded rods 83 near the first rotating shaft 51 all pass through the circumferential sidewall of the sleeve 9 and are rotatably connected to the circumferential sidewall of the sleeve 9. Each of the three sleeves 3 is fixedly fitted with a coaxially placed gear disk 10, which is located inside the sleeve 9. The first rotating shaft 51 is fixedly fitted with a coaxially placed first gear 11, which meshes with the gear disk 10. When the rotating motor 5 is turned on, the output end of the rotating motor 5 drives the first rotating shaft 51, which drives the first gear 11, which drives the gear disk 10, which drives the first threaded rod 83, which drives the first slider 82 to perform threaded meshing transmission, so that the first slider 82 slides along the threaded rod, thereby achieving the purpose of facilitating automatic control of the position adjustment of the first slider 82.

[0047] When the first gear 11 needs to drive the gear disk 10 to rotate, the sleeve 9 needs to be kept stationary to prevent the gear disk 10 and the first gear 11 from rotating synchronously with the first rotating shaft 51. At this time, the sleeve 9 and the first rotating shaft 51 need to maintain a rotational connection.

[0048] When it is necessary to drive the connecting bar 8, the first slider 82, the connecting rod, and the crushing plate 84 to rotate around the central axis of the first rotating shaft 51 so that the crushing plate 84 can crush the gangue-containing coal, the first rotating shaft 51 and the sleeve 9 must be fixedly engaged to maintain synchronous rotation.

[0049] To facilitate selective control of the rotational connection or fixed engagement between the sleeve 9 and the first rotating shaft 51, multiple circular through holes 91 are evenly distributed in a ring around the central axis of the sleeve 9 on its peripheral sidewall. A telescopic cylinder 12 is fixedly installed on the peripheral sidewall of the first rotating shaft 51, located inside the sleeve 9. The telescopic rod of the telescopic cylinder 12 can be inserted into any of the circular through holes 91. When the telescopic rod of the telescopic cylinder 12 retracts away from the circular through hole 91, the first rotating shaft 51 and the sleeve 9 are in a rotational connection. When the telescopic rod of the telescopic cylinder 12 extends and inserts into the circular through hole 91, the sleeve 9 and the first rotating shaft 51 are fixedly engaged through the engagement of the telescopic rod of the telescopic cylinder 12, thus achieving the purpose of facilitating selective control of the rotational connection or fixed engagement between the sleeve 9 and the first rotating shaft 51.

[0050] To prevent gangue from falling into the chute 81 and causing the first threaded rod 83 to jam, the upper surface of the chute 81 is provided with corrugated strips 13 that slide and engage. The corrugated strips 13 can slide along the chute 81. The ends of the corrugated strips 13 near the sleeve 9 are fixedly connected to the sleeve 9, and the ends of the corrugated strips 13 near the rotating ring 7 are fixedly connected to the rotating ring 7. The corrugated strips 13 can all be extended and folded along the axis of the first threaded rod 83. The first sliders 82 are all located below the corrugated strips 13, and the connecting rods all pass through the corrugated strips 13. When the first sliders 82 drive the connecting rods to move, the connecting rods drive the corrugated strips 13 to extend and fold during the movement. Without affecting the position adjustment of the first sliders 82 and the connecting rods, the upper surface of the chute 81 is sealed, thereby preventing gangue from falling into the chute 81 and causing the first threaded rod 83 to jam.

[0051] In order to filter and collect the pure coal discharged from the first discharge port 1001, a first screen plate 14 is fixedly connected to the lower end of the side wall of the washing cylinder 1000. The first screen plate 14 is located below the first discharge port 1001 at the bottom of the washing cylinder 1000. The first screen plate 14 is fan-shaped and the inner side wall of the first screen plate 14 is fixedly connected to the side wall of the washing cylinder 1000. A collection box 15 is fixedly connected to the side wall of the washing cylinder 1000. The collection box 15 is a fan-shaped and annular shell box. The collection box 15 and the first screen plate 14 are placed on the same axis. The diameter of the outer circle of the collection box 15 is equal to the diameter of the outer circle of the first screen plate 14. The upper end face of the collection box 15 and the upper end face of the first screen plate 14 are in the same height plane, and the upper end face of the collection box 15 and the upper end face of the first screen plate 14 complement each other to form a complete ring.

[0052] The skimming mechanism 6 discharges the washed and collected pure coal and part of the heavy suspension through the first discharge port 1001. After passing through the first screen plate 14, the heavy suspension flows out, while the pure coal falls onto the first screen plate 14, thus achieving the filtration and separation of the pure coal and part of the heavy suspension. Then, the pure coal on the first screen plate 14 is pushed out into the collection box 15 for collection, thus achieving the purpose of filtering and collecting the pure coal discharged from the first discharge port 1001.

[0053] To facilitate the automatic pushing of the pure coal filtered on the first screen plate 14 into the collection box 15 for collection, the first screen plate 14 is provided with a pusher 16. The pusher 16 can rotate around the central axis of the first rotating shaft 51 along the upper end face of the first screen plate 14. An arc plate 161 is provided on the side of the pusher 16 away from the washing cylinder 1000. The inner side wall of the arc plate 161 is in contact with the outer peripheral wall of the first screen plate 14. The arc plate 161 can rotate around the central axis of the first rotating shaft 51 along the outer peripheral wall of the first screen plate 14. An ear plate 162 is fixedly connected to the outer side wall of the arc plate 161. A first connecting piece 163 placed vertically downward is fixedly connected to the lower end of the ear plate 162.

[0054] A second circular plate 17 is provided directly below the first circular plate 2. A second rotating shaft 171 is provided on the second circular plate 17 for rotatable connection. The second rotating shaft 171 is placed coaxially with the first rotating shaft 51. The upper end of the second rotating shaft 171 is rotatably connected to the lower end face of the first circular plate 2. A second connecting member 164 is fixedly sleeved on the second rotating shaft 171. The second connecting member 164 is placed horizontally. The end of the second connecting member 164 away from the second rotating shaft 171 is fixedly connected to the lower end of the first connecting member 163.

[0055] A pair of toothed gears 18, which are placed parallel to each other, are mounted on the first rotating shaft 51. The toothed gears 18 are located directly below the collection box 15. A third rotating shaft 191 is mounted on the first circular plate 2. The third rotating shaft 191 is placed coaxially with the second rotating shaft 171. The third rotating shaft 191 passes through the first circular plate 2 and is rotatably connected to the first circular plate 2. A gear post 19, which is placed coaxially, is fixedly mounted on the upper end of the third rotating shaft 191. Both toothed gears 18 can mesh with the gear post 19. The meshing of the two toothed gears 18 with the gear post 19 is alternating. The two toothed gears 18 do not mesh with the gear post 19 at the same time.

[0056] Any toothed gear 18 is fixedly connected to the first rotating shaft 51, and the other toothed gear 18 is rotatably connected to the first rotating shaft 51. On the side surfaces of the toothed gears 18 that are close to each other, there are coaxially placed gear rings 181. A mounting part is fixedly provided on the first circular plate 2. A fourth rotating shaft 20 is fixedly connected to the mounting part. The fourth rotating shaft 20 is placed perpendicular to the first rotating shaft 51. The fourth rotating shaft 20 is perpendicular to the central axis of the first rotating shaft 51. A second gear 201 is rotatably connected on the fourth rotating shaft 20. The second gear 201 is located between the two gear rings 181. The second gear 201 meshes with both gear rings 181.

[0057] The lower end of the third rotating shaft 191 is fixedly fitted with a third gear 21 placed on the same axis, and the second rotating shaft 171 is fixedly fitted with a fourth gear 22.

[0058] When the rotating motor 5 is turned on, its output drives the first rotating shaft 51. The first rotating shaft 51 drives the toothed gear 18 fixedly connected to it. This toothed gear 18 drives another toothed gear 18 through the gear ring 181 and the second gear 201, causing the two toothed gears 18 to rotate in opposite directions. The two toothed gears 18 alternately mesh with the gear post 19, causing the gear post 19 to reciprocate around the central axis of the third rotating shaft 191. The gear post 19 drives the third rotating shaft 191, which in turn drives the third gear 21. The third gear 21 drives the fourth gear 22, which in turn drives the second rotating shaft 171. The second rotating shaft 171 then drives the second connecting member 164 to rotate around its central axis. Connector 164 drives first connector 163, first connector 163 drives ear plate 162, ear plate 162 drives arc plate 161, arc plate 161 drives push bar 16, causing push bar 16 to reciprocate around the central axis of first rotating shaft 51 along the upper end face of first screen plate 14. Push bar 16 pushes the pure coal filtered on first screen plate 14 to move to both sides of first screen plate 14, so that pure coal enters collection box 15 for collection. This achieves the purpose of facilitating the pushing of pure coal filtered on first screen plate 14 into collection box 15 for collection. Moreover, the reciprocating rotation of push bar 16 around the central axis of first rotating shaft 51 allows the collected pure coal to enter from both ends of collection box 15, avoiding excessive accumulation of pure coal at one end of collection box 15 and causing spillage.

[0059] To facilitate the recovery and reuse of the heavy suspension discharged from the washing cylinder 1000, a first storage tank 23 is fixedly connected to the lower end of the first screen plate 14. The upper end of the first storage tank 23 is open. A second storage tank 24 is placed coaxially below the washing cylinder 1000. A first rotating shaft 51 passes through the second storage tank 24 and is rotatably connected to it. The upper end of the second storage tank 24 is open. A second screen plate 241 is fixedly connected to the upper end of the second storage tank 24. A first conduit 25 connects the first storage tank 23 and the second storage tank 24, and the two tanks are connected through the first conduit 25. The second storage tank 24 contains... A water pump is provided, and the output end of the water pump is equipped with a second conduit 251. The other end of the second conduit 251 is connected to the lower end of the washing and screening cylinder 1000. The heavy suspension discharged from the first discharge port 1001 and the second discharge port in the washing and screening cylinder 1000 passes through the first screen plate 14 and the second screen plate 241, and then enters the first storage tank 23 and the second storage tank 24. The heavy suspension in the first storage tank 23 enters the second storage tank 24 through the first conduit 25. The heavy suspension in the second storage tank 24 is guided back to the washing and screening cylinder 1000 by the action of the water pump and the second conduit 251, so as to realize the purpose of recycling and reusing the heavy suspension discharged from the washing and screening cylinder 1000.

[0060] In order to discharge the gangue collected on the second screen plate 241, a rotating bar 242 is fixedly sleeved on the first rotating shaft 51. The rotating bar 242 is located on the upper surface of the second screen plate 241 and can rotate along the surface of the second screen plate 241. The first rotating shaft 51 and the rotating bar 242 are driven by the output end of the rotating motor 5 to achieve the purpose of discharging the gangue collected on the second screen plate 241.

[0061] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A multi-stage coal injection coal cleaning device, comprising a cleaning cylinder (1000), characterized in that, The upper end of the washing and screening cylinder (1000) is open, and a first circular plate (2) is arranged below the washing and screening cylinder (1000). The upper end surface of the first circular plate (2) is provided with a plurality of support columns (3) distributed uniformly. The support columns (3) are all fixedly connected with the bottom of the washing and screening cylinder (1000). A plurality of first discharge ports (1001) are arranged on the side wall of the washing and screening cylinder (1000) in a symmetrical arrangement. A circular ring plate (4) is arranged coaxially on the washing and screening cylinder (1000). The inner side wall of the circular ring plate (4) is attached to the outer side wall of the washing and screening cylinder (1000). A plurality of through hole slots (41) are arranged on the side wall of the circular ring plate (4) in a uniform distribution. The through hole slots (41) are arranged in an inclined staggered manner along the side wall of the circular ring plate (4). The size of the through hole slots (41) is equal to that of the first discharge ports (1001). The through hole slots (41) correspond to the first discharge ports (1001) one by one. When any through hole slot (41) coincides with the corresponding first discharge port (1001) in height, the remaining through hole slots (41) are arranged in a completely staggered manner with the corresponding first discharge ports (1001) in height. A rotating motor (5) is fixedly installed on the first circular plate (2). The output end of the rotating motor (5) is provided with a first rotating shaft (51). The first rotating shaft (51) is arranged coaxially with the washing and screening cylinder (1000). The first rotating shaft (51) penetrates through the lower end surface of the washing and screening cylinder (1000) and is rotatably connected with the washing and screening cylinder (1000). The first rotating shaft (51) is sleeved with a skimming mechanism (6). The first rotating shaft (51) is provided with a clamping groove arranged coaxially on the side wall. The skimming mechanism (6) can slide up and down along the clamping groove. A rotating ring (7) is arranged coaxially in the washing and screening cylinder (1000). The rotating ring (7) is arranged at a position close to the bottom of the washing and screening cylinder (1000). The outer side wall of the rotating ring (7) is rotatably connected with the inner side wall of the washing and screening cylinder (1000). A plurality of connection strips (8) are arranged in the rotating ring (7) in a uniform distribution in a ring shape about the central axis of the first rotating shaft (51). One end of each connection strip (8) is fixedly connected with the first rotating shaft (51). The other end of each connection strip (8) is fixedly connected with the inner side wall of the rotating ring (7). A sliding groove (81) is arranged coaxially on each connection strip (8). A first sliding block (82) is slidably connected in each sliding groove (81). A first threaded rod (83) is arranged coaxially in each sliding groove (81). One end of each first threaded rod (83) is rotatably connected with the rotating ring (7). Each first threaded rod (83) penetrates through the first sliding block (82) and is threadedly connected with the first sliding block (82). A connecting rod is fixedly arranged vertically upward on each first sliding block (82). A pulverizing plate (84) is arranged coaxially on each connecting rod. The bottom of the washing and screening cylinder (1000) is in the shape of a circular truncated cone. The diameter of the lower end of the circular truncated cone is smaller than that of the upper end. A second discharge port is arranged on the bottom of the washing and screening cylinder (1000). A valve plate is arranged on the second discharge port. The skimming mechanism (6) comprises a floating strip (61), the floating strip (61) is sleeved on the first rotating shaft (51), the floating strip (61) is slidably connected with the clamping groove, the floating strip (61) is symmetrically arranged about the central axis of the first rotating shaft (51), the two ends of the floating strip (61) are fixedly connected with mounting plates (62), a double-shaft rotating motor (63) is fixedly installed on one side of the upper end surface of the floating strip (61) near the middle segment position through a fixing block, second threaded rods (64) are arranged on the output ends of the double-shaft rotating motor (63), the second threaded rods (64) are vertically arranged with the floating strip (61), one end of each second threaded rod (64) is rotatably connected with the mounting plate (62), sliding rods (65) are fixedly connected between the two mounting plates (62), the sliding rods (65) are coaxially arranged with the second threaded rods (64), second sliding blocks (66) are threadedly connected with the second threaded rods (64), the second sliding blocks (66) are slidably connected with the sliding rods (65), a pair of symmetrically arranged push plates (67) are fixedly connected to the lower ends of the second sliding blocks (66), and the push plates (67) are located on the two sides of the floating strip (61) parallel to the sliding rods (65).

2. The multi-stage jet-pulse coal cleaning device according to claim 1, characterized in that, A sleeve (9) is arranged between the connecting strip (8) and the first rotating shaft (51), the sleeve (9) is coaxially arranged with the first rotating shaft (51), the inner diameter of the sleeve (9) is greater than the diameter of the first rotating shaft (51), the upper end of the sleeve (9) is in a sealing state, the first rotating shaft (51) penetrates through the sleeve (9) and is rotatably connected with the sleeve (9), the first threaded rods (83) penetrate through the peripheral side wall of the sleeve (9) near the end of the first rotating shaft (51), the first threaded rods (83) are rotatably connected with the peripheral side wall of the sleeve (9), coaxially arranged toothed discs (10) are fixedly sleeved on the first threaded rods (83), the toothed discs (10) are located on the inner side of the sleeve (9), coaxially arranged first gears (11) are fixedly sleeved on the first rotating shaft (51), and the first gears (11) are toothedly connected with the toothed discs (10).

3. The multi-stage jet-pulse coal cleaning device according to claim 2, characterized in that, A plurality of circular through holes (91) are formed in the peripheral side wall of the sleeve (9) and are uniformly distributed in a ring shape about the central axis of the sleeve (9), an expansion cylinder (12) is fixedly installed on the peripheral side wall of the first rotating shaft (51), the expansion cylinder (12) is located on the inner side of the sleeve (9), and the expansion cylinder (12) is inserted into any circular through hole (91).

4. The multi-stage jet-pulse coal cleaning device according to claim 2, characterized in that, The upper end surfaces of the sliding grooves (81) are provided with slidably connected corrugated strips (13), the corrugated strips (13) can slide along the sliding grooves (81), the corrugated strips (13) are fixedly connected with the sleeve (9) near the end of the sleeve (9), the corrugated strips (13) are fixedly connected with the rotating ring (7) near the end of the rotating ring (7), the corrugated strips (13) can be folded and expanded along the axial direction of the first threaded rods (83), the first sliding blocks (82) are located below the corrugated strips (13), and the connecting rods penetrate through the corrugated strips (13).

5. The multi-stage jet-pulse coal cleaning device according to claim 1, characterized in that, The first sieve plate (14) is arranged on the lower end of the washing and selecting cylinder (1000), and the first sieve plate (14) is arranged below the first discharge port (1001) at the lowermost position of the washing and selecting cylinder (1000). The first sieve plate (14) is in the shape of a fan-shaped ring, and the inner side wall of the first sieve plate (14) is fixedly connected with the peripheral side wall of the washing and selecting cylinder (1000). The collecting box (15) is fixedly connected to the peripheral side wall of the washing and selecting cylinder (1000) and is in the shape of a fan-shaped ring. The collecting box (15) is coaxially arranged with the first sieve plate (14), and the diameter of the outer side circle of the collecting box (15) is equal to the diameter of the outer side circle of the first sieve plate (14). The upper end surface of the collecting box (15) is in the same horizontal plane as the upper end surface of the first sieve plate (14), and the upper end surface of the collecting box (15) is complementarily attached to the upper end surface of the first sieve plate (14) to form a complete circular ring.

6. The multi-stage jet-pulse coal cleaning device according to claim 5, characterized in that, The first sieve plate (14) is provided with a push strip (16) which can rotate around the central axis of the first rotating shaft (51) on the upper end surface of the first sieve plate (14). The side of the push strip (16) away from the washing and selecting cylinder (1000) is provided with a circular arc plate (161) which is attached to the outer peripheral wall of the first sieve plate (14). The circular arc plate (161) can rotate around the central axis of the first rotating shaft (51) along the outer peripheral wall of the first sieve plate (14). The outer side wall of the circular arc plate (161) is fixedly connected with an ear plate (162), and the lower end of the ear plate (162) is fixedly connected with a first connecting piece (163) which is vertically arranged downward. The first circular plate (2) is provided below with a second circular plate (17) which is provided with a second rotating shaft (171) which is rotatably connected. The second rotating shaft (171) is coaxially arranged with the first rotating shaft (51), and the upper end of the second rotating shaft (171) is rotatably connected with the lower end surface of the first circular plate (2). The second rotating shaft (171) is fixedly sleeved with a second connecting piece (164) which is horizontally arranged. The end of the second connecting piece (164) away from the second rotating shaft (171) is fixedly connected with the lower end of the first connecting piece (163). The first rotating shaft (51) is sleeved with a pair of upper and lower parallel missing tooth gears (18) which are arranged below the collecting box (15). The first circular plate (2) is provided with a third rotating shaft (191) which is coaxially arranged with the second rotating shaft (171). The third rotating shaft (191) penetrates through the first circular plate (2) and is rotatably connected with the first circular plate (2). The upper end of the third rotating shaft (191) is fixedly sleeved with a coaxially arranged gear column (19). The missing tooth gears (18) are all toothedly connected with the gear column (19), and the tooth engagement of the two missing tooth gears (18) with the gear column (19) is in an alternating conversion relationship. The two missing tooth gears (18) are not simultaneously toothedly connected with the gear column (19). Any toothless gear (18) and first shaft (51) fixed connection, another toothless gear (18) and first shaft (51) rotationally connected, toothless gear (18) on the side of each other close fixedly connected with coaxial placement of gear ring (181), the first circular plate (2) is fixedly provided with a mounting member, the mounting member is fixedly connected with a fourth shaft (20), the fourth shaft (20) is vertically placed with the first shaft (51), the fourth shaft (20) is vertically oriented to the first shaft (51) center axis, the fourth shaft (20) is provided with a second gear (201) rotationally connected, the second gear (201) is located between the two gear tooth ring (181), the second gear (201) is simultaneously connected with two gear tooth ring (181) tooth. The lower end of the third shaft (191) is fixedly provided with a coaxially placed third gear (21), and the fourth gear (22) is fixedly provided on the second shaft (171).

7. The multi-stage jet-pulse coal cleaning device according to claim 5, characterized in that, The lower end of the first sieve plate (14) is fixedly connected with a first liquid storage tank (23), and the upper end of the first liquid storage tank (23) is open. A second liquid storage tank (24) is coaxially arranged below the washing and selecting cylinder (1000). The first shaft (51) penetrates through the second liquid storage tank (24) and is rotationally connected with the second liquid storage tank (24). The upper end of the second liquid storage tank (24) is open. The upper end of the second liquid storage tank (24) is fixedly connected with a second sieve plate (241). A first conduit (25) is connected between the first liquid storage tank (23) and the second liquid storage tank (24). The first liquid storage tank (23) and the second liquid storage tank (24) are connected through the first conduit (25). A water pump is arranged in the second liquid storage tank (24). The output end of the water pump is provided with a second conduit (251). The other end of the second conduit (251) is connected with the lower end of the washing and selecting cylinder (1000).

8. The multi-stage jet-pulse coal cleaning device according to claim 7, characterized in that, The first shaft (51) is fixedly provided with a rotating strip (242). The rotating strip (242) is located on the upper end surface of the second sieve plate (241). The rotating strip (242) can rotate on the surface of the second sieve plate (241).

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