Raw coal multi-stage crushing device and crushing method

Abstract

The invention relates to the technical field of raw coal crushing, and discloses a raw coal multi-stage crushing device and a crushing method.The raw coal multi-stage crushing device comprises a crushing machine body, a coordinated dust removal mechanism is arranged on the crushing machine body, and a limiting and flow limiting mechanism is installed above the crushing machine body; the coordinated dust removal mechanism comprises a limiting disc and a stirring rod connected into the limiting disc in a sliding mode, the limiting disc is fixedly installed on the inner wall of the crusher body, one end of the stirring rod is arranged on the inner wall of the crusher body, and a coordinated assembly is arranged between the limiting disc and the stirring rod; the driving device is used for driving the stirring rod to irregularly disturb and stop raw coal in the crusher body. A coordination spring sleeving the top end of a lifting column can drive one end of a stirring rod to be tightly attached to the inner wall of a limiting sliding groove according to the width change, so that the inclination angle of the stirring rod can be changed accordingly, the disturbance range of the stirring rod in the crusher body is enlarged, larger turbulent flow can be generated in the stirring process, and the stirring efficiency is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of raw coal crushing, in particular to a raw coal multi-stage crushing device and a crushing method. BACKGROUND

[0002] Raw coal refers to the product produced by coal mines without washing, screening and processing, only with manual gangue and impurities. It includes natural coke and poor quality coal, but does not include low calorific value coal (such as stone coal, peat, oil shale, etc.); raw coal can be divided into three categories according to its origin: humic coal, sapropelic coal and humic sapropelic coal; according to its carbonization degree, it can be divided into peat, lignite, bituminous coal and anthracite.

[0003] The dynamic raw coal screening and crushing processing system disclosed by Chinese patent CN116713068B can compensate the roller teeth through the compensation block, effectively avoid the gap between the two roller teeth being too large, cause the size of the material to exceed the standard, improve the working quality of the crusher, and cooperate with the reminding component to emit a reminding sound when the compensation block is in the maximum compensation state, so as to inform the staff to replace the adjusting roller tooth component in time, so that the material can be stably crushed to the size meeting the standard.

[0004] The raw coal crushing equipment has the characteristics that the particle size distribution of raw coal particles is uneven and the shape is irregular. When the raw coal particles enter the feed inlet of the crusher, significant mutual extrusion and friction effects will occur between the materials. Such interaction makes it difficult for raw coal particles to form effective contact with the crushing cutter, affecting the crushing efficiency. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a raw coal multi-stage crushing device and a crushing method, which has the advantages of disturbing the stagnant raw coal, and solves the problem of resistance and blockage between raw coals.

[0006] The present invention provides the following technical solution: a multi-stage coal crushing device, comprising a crusher body, the crusher body is provided with a coordinated dust removal mechanism, a limit position and flow limiting mechanism is installed above the crusher body, the coordinated dust removal mechanism comprises a limit plate and a stirring rod slidably connected in the limit plate, the limit plate is fixedly mounted on the inner wall of the crusher body, one end of the stirring rod is arranged on the inner wall of the crusher body, a coordination component is arranged between the limit plate and the stirring rod, for driving the stirring rod to irregularly disturb stagnant raw coal in the crusher body, a dust removal component is arranged in the stirring rod, for intermittently spraying water mist on the surface of the raw coal, a driving component is arranged on one side of the limit plate, for driving the stirring rod in the crusher body to rotate alternately, thereby accelerating the crushing efficiency of the raw coal, the limit position and flow limiting mechanism comprises a rotating plate and a flow limiting plate slidably connected to the rotating plate, the rotating plate torsion spring is connected to the top of the crusher body, and a limit position component is arranged between the rotating plate and the flow limiting plate, for limiting the height of the raw coal flying.

[0007] As a preferred solution of the raw coal multi-stage crushing device described in the present invention, the coordination component includes a sliding sleeve, which is slidably sleeved on one end of the stirring rod, and a lifting column is hinged above the sliding sleeve, which is slidably connected to a limiting frame on the lifting column, and one end of the lifting column is fixedly connected to a sliding column.

[0008] As a preferred solution of the multi-stage coal crushing device described in the present invention, a coordination spring is arranged between the limit frame and the slide column, the coordination spring is sleeved on the lifting column, an annular slide rail is fixedly connected to the inner wall of the crusher body, the limit frame is clamped and slid on the annular slide rail, a limiting slide groove is provided on the limit plate, a ratchet block frame is fixedly connected to the inner wall of the crusher body, one end of the stirring rod is connected to a universal shaft, and the universal shaft is rotatably connected to the inner wall of the crusher body.

[0009] As a preferred solution of the raw coal multi-stage crushing device described in the present invention, the dust removal assembly includes a nozzle, which is arranged and installed on the stirring rod, and the inner wall of the stirring rod is symmetrically installed with sliding frames, and the sliding frames are slidably connected with sliding plates, and the sliding plates are arranged with connecting holes, and the surface of the sliding plate is slidably connected to the inner wall of the stirring rod.

[0010] As a preferred solution of the raw coal multi-stage crushing device described in the present invention, a folding spring is fixedly installed at one end of the sliding plate, and the folding spring is arranged between the sliding frames. A connecting pipe is fixedly installed on the lower surface of the sliding plate, and a slide is fixedly connected to the other end of the sliding plate. A limiting bevel block is fixedly connected to the limit plate.

[0011] As a preferred scheme of the raw coal multi-stage crushing device, the driving assembly comprises a connecting block fixedly connected to the limiting frame, one end of the connecting block is fixedly connected with a rotating ring, one side of the rotating ring is fixedly connected with a gear ring, and the gear ring is rotatably connected to the upper part of the crusher body.

[0012] As a preferred scheme of the raw coal multi-stage crushing device, the gear ring is internally meshed with a driven gear, one side of the driven gear is meshed with a driven disc, the driven disc is sleeved with a belt, one end of the belt is sleeved with a driving gear, and one side of the driving gear is fixedly installed with a motor.

[0013] As a preferred scheme of the raw coal multi-stage crushing device, the limiting assembly comprises a sliding groove, the sliding groove is formed on both sides of the flow limiting plate, one end of the rotating plate is fixedly connected with a sliding shaft, and one end of the flow limiting plate is fixedly connected with a baffle.

[0014] As a preferred scheme of the raw coal multi-stage crushing device, both sides of the crusher body are provided with adjusting grooves, one end of the flow limiting plate is fixedly connected with a sliding inclined block, one side of the crusher body is slidably connected with a fixed inclined block, the fixed inclined block is fixedly installed with an air cylinder, the top end of the crusher body is fixedly connected with a storage box, and the air cylinder is fixedly connected to the storage box.

[0015] To achieve the above object, the present application provides the following technical scheme: a raw coal multi-stage crushing method, comprising the following steps: At the beginning, one end of the stirring rod is inclined downward in the limiting sliding groove on the limiting disc, the folding elastic sheet pushes the sliding plate between the sliding frames to slide, the sliding plate at one end of the sliding plate is in contact with the inner wall of the limiting disc, the communication hole is staggered with the upper nozzle, and does not maintain a communication state; The output end of the motor drives the driving gear to rotate, drives the meshed gear ring to rotate on the crusher body, the gear ring drives the rotating ring in the crusher body to rotate, the connecting block drives the limiting frame at one end to slide on the annular sliding rail, the sliding sleeve and the lifting column drag one end of the stirring rod to slide along the limiting sliding groove, while the stirring rod rotates along the limiting sliding groove, the coordinating spring sleeved to the top end of the lifting column can be closely combined with one end of the stirring rod and the inner wall of the limiting sliding groove according to the change of the width, so that the inclination angle of the stirring rod also changes, and the disturbance range of the stirring rod in the crusher body is increased; Meanwhile, when the limiting rack drives one end of the stirring rod to slide from the upper end to the lower end of the limiting sliding groove, there is a gap between the thickest end and the thinnest end, and after the stirring rod slides from the gap, the originally compressed coordination spring is quickly pulled to make the stirring rod fit the lower end of the limiting sliding groove under the reaction force, and when the stirring rod continues to rotate, the sliding column will be in contact with the ratchet block installed on the inner wall of the crusher body, and when the sliding column slides up along the inclined surface, the compressed coordination spring is pressed again, the sliding sleeve connected to the stirring rod is moved by the lifting column, so that the stirring rod is no longer in contact with the surface of the limiting sliding groove, and when the sliding column slides from the gap between the two inclined blocks, the compressed coordination spring will quickly pull the stirring rod to move and contact the inner wall of the limiting sliding groove under the reaction force, so that the stirring rod shakes in the process, and the reciprocating operation is realized. When the stirring rod slides along the limiting sliding groove from the thin end to the thick end above, the sliding plate extending from one end of the stirring rod will slide along the limiting sliding groove and contact the limiting inclined block, and as the stirring rod continues to rotate, the sliding plate at one end of the stirring rod will slide along the inclined surface on one side of the limiting inclined block, and at the same time, the sliding plate will push the sliding plate between the two sliding racks to slide to the other end, push the folding spring sheet at the other end to slide and press, so that the communication hole on the sliding plate is gradually aligned with the spray head on the stirring rod, and when the sliding plate slides to the top end of the limiting inclined block, the communication hole is also aligned with the spray head, water is transported into each spray head through the communication pipe below the sliding plate, water mist is sprayed upward, the surface moisture is increased to suppress dust flying, the amount of spray is controlled intermittently, the surface moisture is maintained in the dust suppression safety interval of 8%-10%, and the coal dust can be effectively controlled. After the water mist is sprayed, the tiny water droplets collide with the coal dust particles and adhere to the surface of the raw coal to form a wet layer, which reduces the frictional resistance between the particles, so that the water mist can fall on the surface of the raw coal in a larger range, and when the sliding plate slides through the limiting inclined block, the compressed folding spring sheet will push the sliding plate to slide back to its original position, so that the communication hole is disconnected with the spray head. In this way, the reciprocating operation is realized, which facilitates the subsequent crushing efficiency of the raw coal. Initially, the two rotating plates are in a vertical state, the sliding shaft is located at the bottom end of the sliding groove, and the limiting plate slides to the two sides to open, the bottom end of the rotating plate contacts the lower surface of the limiting plate. The output end of the air cylinder pushes the fixed inclined block to slide downward, so that the fixed inclined block is separated from the sliding inclined blocks on both sides, the torsional spring pushes the rotating plate to rotate under the reaction force, the top end of the rotating plate pushes the baffle on one side to drive the limiting plate above to slide along the adjusting groove, and at the same time, the sliding shaft gradually slides upward from the bottom end of the sliding groove, and the rotating plates on both sides are inclined above the crusher body to limit the raw coal in the crusher body, and at the same time, the discharge opening between the storage tank and the crusher body is reduced, so as to avoid the raw coal from rushing down and falling into the crusher body to cause blockage during loading.

[0016] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects: 1. The coordinated spring sleeved at the top end of the lifting column can drive one end of the stirring rod to tightly fit the inner wall of the limiting sliding groove according to the change in width, so that the inclination angle of the stirring rod also changes, the disturbance range of the stirring rod in the crusher body is increased, greater turbulence can be generated in the stirring process, and the stirring efficiency is further improved.

[0017] 2. When the sliding column is pushed to slide off the drop between the two inclined blocks, the compressed coordinated spring will quickly pull the stirring rod to move against the inner wall of the limiting sliding groove under the reaction force, so that the stirring rod shakes in this process, which can effectively reduce the accumulation and blockage of raw coal at the crushing port, so that the raw coal can more smoothly enter the crushing equipment, thereby improving the efficiency of the entire production process.

[0018] 3. By pushing the sliding plate to slide and extrude the folded elastic sheet at the other end, the communication hole on the sliding plate is aligned with the spray head on the stirring rod, water mist is sprayed upward, the surface moisture is increased to suppress dust flying, thereby effectively reducing the suspended dust in the air, and also reducing the high friction between raw coal blocks, improving the subsequent crushing efficiency of raw coal. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0020] Figure 1 is a schematic view of the overall structure of the present application; Figure 2 is a schematic view of the structure of the crusher body of the present application; Figure 3 is a schematic view of the coordinated dust removal mechanism of the present application; Figure 4 is a schematic view of the driving assembly of the present application; Figure 5 is a schematic view of the coordinated assembly of the present application; Figure 6 is a schematic view of the Figure 5 is an enlarged schematic view of position A in the present application; Figure 7 is an enlarged schematic view of position B in the present application; Figure 5 Figure 8 is a schematic view of the limiting and flow limiting mechanism of the present application. ​

[0021] In the figure: 100, crusher body; 200, coordinated dust removal mechanism; 201, limit disc; 202, stirring rod; 203, sliding sleeve; 204, lifting column; 205, limiting frame; 206, sliding column; 207, coordination spring; 208, annular slide rail; 209, limiting sliding groove; 210, ratchet block frame; 211, universal shaft; 212, spray head; 213, sliding frame; 214, sliding plate; 215, communication hole; 216, folding elastic sheet; 217, communication pipe; 218, sliding plate; 219, limiting inclined block; 220, connecting block; 221, rotating ring; 222, gear ring; 223, driven gear; 224, driven disc; 225, belt; 226, drive gear; 227, motor; 300, limiting current limiting mechanism; 301, rotating plate; 302, current limiting plate; 303, sliding groove; 304, sliding shaft; 305, baffle; 306, adjusting groove; 307, sliding inclined block; 308, fixed inclined block; 309, air cylinder; 310, storage box. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] The present application will be further described in conjunction with the embodiments.

[0024] Embodiment 1: Reference Figure 1 and Figure 2 The first embodiment of the present application provides a raw coal multi-stage crushing device, which comprises a crusher body 100, a coordinated dust removal mechanism 200 is arranged on the crusher body 100, and a limiting current limiting mechanism 300 is installed above the crusher body 100. The coordinated dust removal mechanism 200 comprises a limit disc 201 and a stirring rod 202 slidingly connected in the limit disc 201, the limit disc 201 is fixedly installed on the inner wall of the crusher body 100, one end of the stirring rod 202 is arranged on the inner wall of the crusher body 100, a coordination assembly is arranged between the limit disc 201 and the stirring rod 202, for driving the stirring rod 202 to irregularly disturb the stagnant raw coal in the crusher body 100, a dust removal assembly is arranged in the stirring rod 202, for intermittently spraying water mist on the surface of the raw coal, a driving assembly is arranged on one side of the limit disc 201, for driving the stirring rod 202 in the crusher body 100 to stagger rotation, and accelerating the crushing efficiency of the raw coal; The limiting and current-limiting mechanism 300 comprises a rotating plate 301 and a current-limiting plate 302 slidingly connected to the rotating plate 301, the rotating plate 301 is torsionally spring-connected to the top end of the crusher body 100, and a limiting assembly is arranged between the rotating plate 301 and the current-limiting plate 302 for limiting the height of the coal crashing.

[0025] Embodiment 2: Reference Figures 1-7 For the second embodiment of the present application, a raw coal multi-stage crushing device is provided, and the coordination assembly comprises a sliding sleeve 203 slidingly sleeved at one end of the stirring rod 202, a lifting column 204 hingedly connected above the sliding sleeve 203, a limiting frame 205 slidingly connected to the lifting column 204, a slide column 206 fixedly connected to one end of the lifting column 204, one end of the stirring rod 202 slidingly connected to the limiting disc 201, and an opening formed on the side of the limiting frame 205 away from the lifting column 204.

[0026] A coordination spring 207 is arranged between the limiting frame 205 and the slide column 206, the coordination spring 207 is sleeved on the lifting column 204, an annular slide rail 208 is fixedly connected to the inner wall of the crusher body 100, the limiting frame 205 is clamped and slides on the annular slide rail 208, a limiting sliding groove 209 is formed on the limiting disc 201, a ratchet block frame 210 is fixedly connected to the inner wall of the crusher body 100, a universal shaft 211 is connected to one end of the stirring rod 202, the universal shaft 211 is rotationally connected to the inner wall of the crusher body 100, a limiting ring is arranged on both sides of the annular slide rail 208, one end of the limiting frame 205 is fitted on the annular slide rail 208 and slides, so that the limiting frame 205 is prevented from swinging when sliding along the annular slide rail 208, the limiting sliding groove 209 has a shape of a wide distance between the upper end and the edge, a narrow distance between the lower end and the edge, a worm-shaped groove connected by a middle annular arc, and a groove gradually opening or tapering around the central axis.

[0027] The dust removal assembly comprises a spray head 212 arranged on the stirring rod 202, a sliding frame 213 symmetrically arranged on the inner wall of the stirring rod 202, a sliding plate 214 slidingly connected between the sliding frames 213, a plurality of communication holes 215 arranged on the sliding plate 214, and the surface of the sliding plate 214 slidingly connected to the inner wall of the stirring rod 202, the sliding frame 213 has an L-shaped structure, and the symmetric sliding frames 213 clamp the sliding plate 214 slidingly arranged in the middle on the inner wall of the stirring rod 202.

[0028] One end of the sliding plate 214 is fixedly provided with a folding elastic sheet 216, the folding elastic sheet 216 is arranged between the sliding frames 213, the lower surface of the sliding plate 214 is fixedly provided with a communication pipe 217, the other end of the sliding plate 214 is fixedly connected with a sliding plate 218, the limiting disc 201 is fixedly connected with a limiting inclined block 219, the communication pipe 217 is connected with each communication hole 215 on the sliding plate 214, the limiting inclined block 219 is fixedly connected in the limiting sliding groove 209, and the limiting inclined block 219 is provided with an inclined surface on one side, so that the sliding plate 218 can slide to the limiting inclined block 219.

[0029] The driving assembly comprises a connecting block 220, the connecting block 220 is fixedly connected to the limiting frame 205, one end of the connecting block 220 is fixedly connected with a rotating ring 221, one side of the rotating ring 221 is fixedly connected with a gear ring 222, the gear ring 222 is rotatably connected to the crusher body 100, the connecting block 220 is connected to the opening on one side of the limiting frame 205, and the rotating ring 221 is rotatably connected to the crusher body 100.

[0030] The gear ring 222 is meshed with a driven gear 223, one side of the driven gear 223 is meshed with a driven disc 224, the driven disc 224 is sleeved with a belt 225, one end of the belt 225 is sleeved with a driving gear 226, one side of the driving gear 226 is fixedly provided with a motor 227, the crusher body 100 is provided with a limiting plate on one side, the driven gear 223, the driven disc 224 and the motor 227 are all mounted on the limiting plate, the diameter of the belt 225 at one end of the driven disc 224 is larger than that of the belt 225 at one end of the driving gear 226, and the driving gear 226 drives another group in the crusher body 100 to rotate in the opposite direction.

[0031] Specifically, initially, one end of the stirring rod 202 is inclined downward in the limiting sliding groove 209 on the limiting disc 201, the folding elastic sheet 216 pushes the sliding plate 214 between the sliding frames 213 to slide, the sliding plate 218 at one end of the sliding plate 214 is in contact with the inner wall of the limiting disc 201, the communication hole 215 is staggered with the upper nozzle 212 and does not keep a communication state; The output end of the motor 227 drives the driving gear 226 to rotate, and the meshing gear ring 222 rotates on the crusher body 100, the gear ring 222 drives the rotating ring 221 in the crusher body 100 to rotate, and the connecting block 220 drives the one-end connected limiting frame 205 to slide on the annular slide rail 208, the sliding sleeve 203 and the lifting column 204 pull one end of the stirring rod 202 to slide along the limiting sliding groove 209, while the stirring rod 202 rotates along the limiting sliding groove 209, the coordinating spring 207 sleeved at the top end of the lifting column 204 can drive one end of the stirring rod 202 to tightly fit the inner wall of the limiting sliding groove 209 according to the change of the width, so that the inclination angle of the stirring rod 202 also changes, and the disturbance range of the stirring rod 202 in the crusher body 100 is increased; At the same time, when the limiting frame 205 drives one end of the stirring rod 202 to slide from the upper end to the lower end of the limiting sliding groove 209, there is a gap between the thickest end and the thinnest end, after the stirring rod 202 slides from the gap, the originally compressed coordinating spring 207 quickly pulls the stirring rod 202 to fit the lower end of the limiting sliding groove 209 under the reaction force, and when the stirring rod 202 continues to rotate, the slide column 206 will be in contact with the ratchet block frame 210 installed on the inner wall of the crusher body 100, when the slide column 206 slides upward along the inclined surface, the coordinating spring 207 sleeved on the lifting column 204 is again extruded, the sliding sleeve 203 sleeved on the stirring rod 202 is moved by the lifting column 204, so that the stirring rod 202 is no longer fitted with the surface of the limiting sliding groove 209, when the slide column 206 slides from the gap between the two inclined blocks, the compressed coordinating spring 207 quickly pulls the stirring rod 202 to move and contact the inner wall of the limiting sliding groove 209 under the reaction force, so that the stirring rod 202 shakes in the process, and the coal blocks relatively displace due to the inertia difference, the interlaced sliding between the particles forms shear stress, the surface crack expands until the crushing is realized, and the primary crushing is realized, and the raw coal is secondarily crushed by the crushing roller below; When the stirring rod 202 slides along the limiting sliding groove 209 from the thin end to the thick end above, the sliding plate 218 at one end of the stirring rod 202 will slide along the limiting sliding groove 209 and be in contact with the limiting inclined block 219, and with the continuous rotation of the stirring rod 202, the sliding plate 218 at one end of the stirring rod 202 will slide along the inclined surface on one side of the limiting inclined block 219, and at the same time, the sliding plate 218 will push the sliding plate 214 between the sliding frames 213 on the two sides to slide to the other end, push the folding elastic sheet 216 at the other end to slide and extrude, so that the communication hole 215 on the sliding plate 214 is gradually aligned with the spray head 212 on the stirring rod 202, when the sliding plate 218 slides to the top end of the limiting inclined block 219, the communication hole 215 is also aligned with the spray head 212, water is transported into each spray head 212 through the communication pipe 217 below the sliding plate 214 to spray water mist upward, so as to inhibit dust flying by increasing the surface moisture, and by intermittently controlling the amount of spray, the surface moisture is maintained in the dust control safety interval of 8%-10%, so that the coal dust can be effectively controlled, after the water mist is sprayed, the tiny water droplets collide with the coal dust particles and adhere to the surface of the raw coal to form a wet layer, this process reduces the frictional resistance between the particles, so that the water mist can fall on the surface of the raw coal in a larger range, when the sliding plate 218 slides through the limiting inclined block 219, the compressed folding elastic sheet 216 will push the sliding plate 214 to slide back to the original position, so as to disconnect the communication hole 215 and the spray head 212, and the reciprocating work is convenient, which can speed up the crushing efficiency of the subsequent raw coal.

[0032] Embodiment 3: for reference Figure 1 、 Figure 2 and Figure 8 , the third embodiment of the present application provides a raw coal multi-stage crushing device, the limiting component comprises a sliding groove 303, the sliding groove 303 is arranged on the two sides of the flow limiting plate 302, one end of the rotating plate 301 is fixedly connected with a sliding shaft 304, one end of the flow limiting plate 302 is fixedly connected with a baffle 305.

[0033] Adjusting grooves 306 are arranged on the two sides of the crusher body 100, a sliding inclined block 307 is fixedly connected to one end of the flow limiting plate 302, a fixed inclined block 308 is slidingly connected to one side of the crusher body 100, a cylinder 309 is fixedly installed on the fixed inclined block 308, and a storage box 310 is fixedly connected to the top end of the crusher body 100, and the cylinder 309 is fixedly connected to the storage box 310.

[0034] Specifically, initially, the rotating plates 301 on the two sides are in a vertical state, the fixed inclined block 308 is between the sliding inclined blocks 307 on the two sides, the sliding shaft 304 is located at the top end of the sliding groove 303, the flow limiting plate 302 slides open to the two sides, and the top end of the rotating plate 301 is in contact with the lower surface of the flow limiting plate 302. The fixed inclined block 308 is pushed to slide downward by the output end of the air cylinder 309, so that the fixed inclined block 308 is separated from the sliding inclined blocks 307 on both sides, the torsional spring pushes the rotating plate 301 to rotate under the reaction force, so that the top end of the rotating plate 301 pushes the baffle 305 on one side to drive the flow limiting plate 302 above to slide along the adjusting groove 306, and the sliding shaft 304 gradually slides downward from the top end of the sliding groove 303, and the rotating plates 301 on both sides are inclined above the crusher body 100 to limit the raw coal in the crusher body 100, so that the double-toothed roller crusher avoids applying extrusion and shearing force to the raw coal by high-speed rotation of the roller, when the internal stress of the coal exceeds its compressive strength, the elastic potential energy is released instantaneously, causing the raw coal fragments to burst out of the equipment, and at the same time, the discharge port between the storage box 310 and the crusher body 100 is reduced, so that when the raw coal is loaded, the raw coal is not all fallen into the crusher body 100 to cause blockage.

[0035] Embodiment 4: Refer to Figures 1-8 The fourth embodiment of the present application provides a raw coal multi-stage method, comprising the following steps: At the beginning, one end of the stirring rod 202 is inclined downward in the limiting sliding groove 209 on the limiting disc 201, the folded elastic sheet 216 pushes the sliding plate 214 between the sliding frames 213 to slide, so that the sliding plate 218 at one end of the sliding plate 214 is in contact with the inner wall of the limiting disc 201, the communication hole 215 is staggered with the upper nozzle 212 and does not maintain a communication state; The driving gear 226 is driven to rotate by the output end of the motor 227, the meshing gear ring 222 is driven to rotate on the crusher body 100, the gear ring 222 drives the rotating ring 221 in the crusher body 100 to rotate, the limiting frame 205 connected at one end is driven to slide on the annular sliding rail 208 through the connecting block 220, one end of the stirring rod 202 is driven to slide along the limiting sliding groove 209 through the sliding sleeve 203 and the lifting column 204, while the stirring rod 202 rotates along the limiting sliding groove 209, the coordinated spring 207 sleeved at the top end of the lifting column 204 can drive one end of the stirring rod 202 to tightly fit with the inner wall of the limiting sliding groove 209 according to the change of the width, so that the inclination angle of the stirring rod 202 also changes, and the disturbance range of the stirring rod 202 in the crusher body 100 is increased; At the same time, when the limit frame 205 drives one end of the stirring rod 202 to slide from the upper end of the limit slide 209 to the lower end, there is a gap between the thickest end and the thinnest end. After the stirring rod 202 slides from here, the originally compressed coordination spring 207 quickly pulls the stirring rod 202 to fit the lower end of the limit slide 209 under the reaction force. As the stirring rod 202 continues to rotate, the sliding column 206 will conflict with the ratchet block frame 210 installed on the inner wall of the crusher body 100. When the sliding column 206 slides up along the inclined surface, it squeezes the coordination spring 207 sleeved on the lifting column 204 again, and the lifting column 204 pushes The sliding sleeve 203 movably connected to the stirring rod 202 moves, so that the stirring rod 202 no longer fits the surface of the limiting chute 209. When the slide column 206 slides down from the drop between the two inclined blocks, the compressed coordination spring 207 will quickly pull the stirring rod 202 toward the inner wall of the limiting chute 209 under the reaction force, causing the stirring rod 202 to vibrate in the process. In this reciprocating operation, during the stirring movement, the coal blocks produce relative displacement due to the inertia difference. The staggered sliding between the particles forms shear stress, causing the surface cracks to expand until they are broken to achieve primary crushing. The raw coal is then crushed by the crushing roller below for secondary crushing. When the stirring rod 202 slides from the thin end to the thick end above along the limiting slide groove 209, the slide plate 218 extending from one end of the stirring rod 202 will slide along the limiting slide groove 209 and conflict with the limiting bevel block 219. As the stirring rod 202 continues to rotate, the slide plate 218 at one end of the stirring rod 202 will slide along the inclined surface of one side of the limiting bevel block 219. At the same time, the slide plate 218 will push the sliding plate 214 between the sliding frames 213 on both sides to slide toward the other end, pushing the sliding plate 214 to slide and squeeze the folded spring piece 216 at the other end, so that the connecting hole 215 on the sliding plate 214 gradually aligns with the nozzle 212 on the stirring rod 202. When the slide plate 218 slides to the top of the limiting bevel block 219, the connecting hole 215 is also aligned with the nozzle 212. Water is transported to each nozzle 212 through the connecting pipe 217 under the sliding plate 214, and the water mist is sprayed upward, thereby suppressing the flying of dust by increasing the surface moisture. By intermittently controlling the spray volume, the surface moisture is maintained in the dust suppression safety range of 8%-10%, and the coal dust can be effectively controlled. After the water mist is sprayed, the tiny water droplets collide with the coal dust particles and adhere to the surface of the raw coal, forming a wet layer. This process reduces the friction resistance between the particles, allowing the water mist to fall on the surface of the raw coal in a larger range. When the slide plate 218 slides over the limiting inclined block 219, the compressed folded spring 216 will push the sliding plate 214 to slide back to its original position, disconnecting the connecting hole 215 from the nozzle 212, and thus working back and forth, it is convenient to accelerate the subsequent raw coal crushing efficiency; Initially, the rotating plates 301 on both sides are in a vertical state, the fixed inclined blocks 308 are between the sliding inclined blocks 307 on both sides, the sliding shaft 304 is located at the top of the sliding groove 303, the flow limiting plate 302 slides to both sides and opens, and the top of the rotating plate 301 contacts the bottom surface of the flow limiting plate 302; The output end of the cylinder 309 pushes the fixed inclined block 308 to slide downward, so that the fixed inclined block 308 disengages from between the sliding inclined blocks 307 on both sides. The torsion spring pushes the rotating plate 301 to rotate under the reaction force, so that the top of the rotating plate 301 pushes the baffle 305 on one side to drive the upper flow limiting plate 302 to slide along the adjusting groove 306. At the same time, the sliding shaft 304 gradually slides downward from the top of the sliding groove 303. The rotating plates 301 on both sides are tilted above the crusher body 100, limiting the raw coal in the crusher body 100, preventing the double-toothed roller crusher from applying squeezing and shearing forces to the raw coal through the high-speed rotation of the rollers. When the internal stress of the coal block exceeds its compressive strength, the elastic potential energy will be released instantly, causing the raw coal fragments to burst out of the equipment and at the same time narrow the discharge port between the storage box 310 and the crusher body 100 to avoid the raw coal rushing down and falling into the crusher body 100 and causing blockage during loading.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A raw coal multi-stage crushing device, comprising a crusher body (100), characterized in that: A coordinated dust removal mechanism (200) is provided on the crusher body (100), and a position limiting and current limiting mechanism (300) is installed above the crusher body (100); The coordinated dust removal mechanism (200) comprises a limit plate (201) and a stirring rod (202) slidably connected to the limit plate (201), the limit plate (201) being fixedly mounted on the inner wall of the crusher body (100), one end of the stirring rod (202) being arranged on the inner wall of the crusher body (100), a coordination component being arranged between the limit plate (201) and the stirring rod (202), for driving the stirring rod (202) to irregularly disturb stagnant raw coal in the crusher body (100), a dust removal component being arranged in the stirring rod (202), for intermittently spraying water mist on the surface of the raw coal, and a driving component being arranged on one side of the limit plate (201), for driving the stirring rod (202) in the crusher body (100) to rotate in an intermittent manner, thereby accelerating the pulverization efficiency of the raw coal; The position limiting and current limiting mechanism (300) comprises a rotating plate (301) and a current limiting plate (302) slidably connected to the rotating plate (301); the rotating plate (301) is connected to the top of the crusher body (100) by a torsion spring; a position limiting component is provided between the rotating plate (301) and the current limiting plate (302) for limiting the height of the raw coal avalanche.

2. The multi-stage coal crushing device according to claim 1, characterized in that: The coordination component comprises a sliding sleeve (203), the sliding sleeve (203) being slidably sleeved on one end of the stirring rod (202), a lifting column (204) being hinged above the sliding sleeve (203), a limiting frame (205) being slidably connected to the lifting column (204), and a sliding column (206) being fixedly connected to one end of the lifting column (204).

3. The multi-stage coal crushing device according to claim 2, characterized in that: A coordination spring (207) is provided between the limit frame (205) and the slide column (206), and the coordination spring (207) is sleeved on the lifting column (204). An annular slide rail (208) is fixedly connected to the inner wall of the crusher body (100), and the limit frame (205) is engaged and slid on the annular slide rail (208). A limit slide groove (209) is provided on the limit plate (201), and a ratchet block frame (210) is fixedly connected to the inner wall of the crusher body (100). One end of the stirring rod (202) is connected to a universal shaft (211), and the universal shaft (211) is rotatably connected to the inner wall of the crusher body (100).

4. The multi-stage coal crushing device according to claim 1, characterized in that: The dust removal assembly comprises a nozzle (212), the nozzle (212) being arranged and mounted on the stirring rod (202), a sliding frame (213) being symmetrically mounted on the inner wall of the stirring rod (202), a sliding plate (214) being slidably connected between the sliding frames (213), and connecting holes (215) being arranged and opened on the sliding plate (214), and a surface of the sliding plate (214) being slidably connected to the inner wall of the stirring rod (202).

5. The multi-stage raw coal crushing device according to claim 4, characterized in that: A folding spring (216) is fixedly mounted on one end of the sliding plate (214), and the folding spring (216) is arranged between the sliding frames (213). A connecting pipe (217) is fixedly mounted on the lower surface of the sliding plate (214). A sliding plate (218) is fixedly connected to the other end of the sliding plate (214). A limiting inclined block (219) is fixedly connected to the limiting plate (201).

6. The multi-stage coal crushing device according to claim 1, characterized in that: The driving assembly comprises a connecting block (220), wherein the connecting block (220) is fixedly connected to the limiting frame (205), one end of the connecting block (220) is fixedly connected to a rotating ring (221), one side of the rotating ring (221) is fixedly connected to a gear ring (222), and the gear ring (222) is rotatably connected to the crusher body (100).

7. The multi-stage coal crushing device according to claim 6, characterized in that: A driven gear (223) is meshed inside the gear ring (222), a driven disc (224) is meshed on one side of the driven gear (223), a belt (225) is sleeved on the driven disc (224), a driving gear (226) is sleeved on one end of the belt (225), and a motor (227) is fixedly mounted on one side of the driving gear (226).

8. The multi-stage coal crushing device according to claim 1, characterized in that: The position limiting assembly comprises a sliding groove (303), the sliding groove (303) being provided on both sides of the flow limiting plate (302), one end of the rotating plate (301) being fixedly connected to a sliding shaft (304), and one end of the flow limiting plate (302) being fixedly connected to a baffle (305).

9. The multi-stage coal crushing device according to claim 1, characterized in that: Adjustment slots (306) are provided on both sides of the crusher body (100); one end of the flow limiting plate (302) is fixedly connected to a sliding inclined block (307); one side of the crusher body (100) is slidably connected to a fixed inclined block (308); a cylinder (309) is fixedly mounted on the fixed inclined block (308); a top end of the crusher body (100) is fixedly connected to a material storage box (310); and the cylinder (309) is fixedly connected to the material storage box (310).

10. A method for multi-stage crushing of raw coal, using the multi-stage crushing device of any one of claims 1 to 9, characterized in that , including the following steps: Initially, one end of the stirring rod (202) is tilted downward in the limiting slide groove (209) on the limiting plate (201), and the folding spring (216) pushes the sliding plate (214) between the sliding frames (213) to slide, so that the slide plate (218) at one end of the sliding plate (214) contacts the inner wall of the limiting plate (201), so that the communicating hole (215) and the nozzle (212) above are staggered and do not maintain a connected state; The output end of the motor (227) drives the driving gear (226) to rotate, driving the meshing gear ring (222) to rotate on the crusher body (100), and the gear ring (222) drives the rotating ring (221) in the crusher body (100) to rotate, and drives the limit frame (205) connected at one end to slide on the annular slide rail (208) through the connecting block (220), and pulls one end of the stirring rod (202) to slide along the limit slide groove (209) through the sliding sleeve (203) and the lifting column (204). While the stirring rod (202) rotates along the limit slide groove (209), the coordination spring (207) sleeved on the top end of the lifting column (204) can drive one end of the stirring rod (202) to fit closely with the inner wall of the limit slide groove (209) according to the change in width, so that the inclination angle of the stirring rod (202) will also change accordingly; At the same time, when the limit frame (205) drives one end of the stirring rod (202) to slide from the upper end of the limit chute (209) to the lower end, there is a gap between the thickest end and the thinnest end. After the stirring rod (202) slides from this place, the originally compressed coordination spring (207) quickly pulls the stirring rod (202) to fit the lower end of the limit chute (209) under the reaction force. As the stirring rod (202) continues to rotate, the sliding column (206) will conflict with the ratchet block frame (210) installed on the inner wall of the crusher body (100). When the sliding column (206) slides up along the inclined surface, the sliding column (206) will contact the ratchet block frame (210) installed on the inner wall of the crusher body (100). When the lifting column (206) is lifted, the coordination spring (207) sleeved on the lifting column (204) is squeezed again, and the sliding sleeve (203) sleeved on the stirring rod (202) is pushed by the lifting column (204) to move, so that the stirring rod (202) no longer fits the surface of the limiting slide groove (209). When the sliding column (206) slides down from the drop between the two inclined blocks, the compressed coordination spring (207) will quickly pull the stirring rod (202) to move toward the inner wall of the limiting slide groove (209) under the reaction force, so that the stirring rod (202) shakes during this process, thereby reciprocating. When the stirring rod (202) slides from the thin end to the upper thick end along the limiting slide groove (209), the slide plate (218) extending from one end of the stirring rod (202) will slide along the limiting slide groove (209) and come into contact with the limiting bevel block (219). As the stirring rod (202) continues to rotate, the slide plate (218) at one end of the stirring rod (202) will slide along the inclined surface on one side of the limiting bevel block (219). At the same time, the slide plate (218) will push the sliding plate (214) between the two side sliding frames (213) to slide toward the other end, pushing the sliding plate (214) to slide and squeeze the folding spring (216) at the other end, so that the connecting member on the sliding plate (214) is The hole (215) gradually aligns with the nozzle (212) on the stirring rod (202). When the slide plate (218) slides to the top of the limiting inclined block (219), the connecting hole (215) is also aligned with the nozzle (212). Water is transported to each nozzle (212) through the connecting pipe (217) below the sliding plate (214), and the water mist is sprayed upward. When the slide plate (218) slides through the limiting inclined block (219), the compressed folded spring (216) pushes the sliding plate (214) to slide back to its original position, disconnecting the connecting hole (215) from the nozzle (212). In this way, the reciprocating operation is convenient for accelerating the subsequent raw coal crushing efficiency. Initially, the rotating plates (301) on both sides are in a vertical state, the fixed inclined blocks (308) are between the sliding inclined blocks (307) on both sides, the sliding shaft (304) is located at the top of the sliding groove (303), the flow limiting plate (302) slides open to both sides, and the top of the rotating plate (301) contacts the lower surface of the flow limiting plate (302); The fixed inclined block (308) is pushed downward by the output end of the cylinder (309), so that the fixed inclined block (308) is disengaged from between the sliding inclined blocks (307) on both sides. The torsion spring pushes the rotating plate (301) to rotate under the reaction force, so that the top of the rotating plate (301) pushes the baffle (305) on one side to drive the upper flow limiting plate (302) to slide along the adjustment groove (306). At the same time, the sliding shaft (304) gradually slides downward from the top of the sliding groove (303). The rotating plates (301) on both sides are tilted above the crusher body (100), limiting the raw coal in the crusher body (100) and simultaneously narrowing the discharge port between the storage box (310) and the crusher body (100).

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