A multi-stage coal pulverizing device

Abstract

The application discloses a kind of multistage coal pulverizing device, it is related to coal processing technical field, including pulverizing box, first coal hopper and second coal hopper are equipped with in the top communication of pulverizing box, the bottom end of inner wall of pulverizing box is rotatably equipped with multiple first pulverizing rollers, one end of each first pulverizing roller is penetrated to the outside of pulverizing box and is fixedly equipped with the first gear of intermeshing connection, the outer wall of pulverizing box is fixedly equipped with mounting bracket, and drive motor is equipped on mounting bracket, the output end of drive motor is drivingly connected with the end of one of first pulverizing roller, the inner wall of pulverizing box in the bottom of first pulverizing roller is equipped with the filtering recovery mechanism for filtering coal of primary pulverization, the lowest end of filtering recovery mechanism is equipped with the secondary pulverization mechanism capable of pulverizing coal again, by being equipped with multistage pulverization mechanism, so that coal raw material is pulverized for the first time and is pulverized for the second time, pulverization effect is more thorough, improves pulverization efficiency, ensures the uniformity of coal pulverization size, enhances the pulverization quality of device.

Description

TECHNICAL FIELD

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

[0002] In the process of coal mining and processing, the implementation of crushing operation on coal occupies a pivotal position. Only after the fine crushing treatment of raw coal or bituminous coal, can it smoothly enter the subsequent processing and treatment procedures to meet the needs of various industrial applications. However, the final effect of material crushing depends largely on the performance of the crushing device.

[0003] At present, although the coal industry has widely adopted the pulverizer for crushing coal, many traditional coal crushing devices still have obvious shortcomings in practical application. These devices not only have unsatisfactory crushing effect, but also often cause serious unevenness of coal particle size. Such unevenness not only brings additional difficulty to the subsequent coal screening, washing and other processes, but also may lead to the reduction of production efficiency and the increase of cost. SUMMARY

[0004] The purpose of the present application is to provide a multi-stage coal crushing device to solve the problem of poor crushing effect of the existing coal crushing device, which easily causes serious unevenness of coal particle size and reduces production efficiency.

[0005] A multi-stage coal crushing device, comprising a crushing box, a first coal inlet hopper and a second coal inlet hopper are communicated at the top of the crushing box, a plurality of first crushing rollers are rotatably arranged at the bottom of the inner wall of the crushing box, one end of each first crushing roller penetrates to the outside of the crushing box and is fixedly sleeved with first gears connected with each other, a mounting bracket is fixedly arranged on the outer wall of the crushing box, a driving motor is arranged on the mounting bracket, the output end of the driving motor is in transmission connection with the end of one of the first crushing rollers, the output end of the driving motor is in transmission connection with a stirring mechanism capable of uniformly mixing coal through a first synchronous belt, a filtering and recycling mechanism for filtering and recycling the coal crushed for the first time is arranged on the inner wall of the crushing box at the bottom of the first crushing roller, a circulating mechanism for transporting the coal not crushed is communicated with the highest end of the filtering and recycling mechanism, and a secondary crushing mechanism capable of crushing the coal again is arranged at the lowest end of the filtering and recycling mechanism.

[0006] Preferably, the stirring mechanism comprises two side plates arranged at the top of the crushing box, a rotating shaft is rotatably arranged between the side walls of the side plates, the rotating shaft is in transmission connection with the output end of the driving motor through the first synchronous belt, a main bevel gear is fixedly sleeved on the shaft body of the rotating shaft, a stirring main shaft is rotatably arranged through the top of the crushing box, a secondary bevel gear meshingly connected with the main bevel gear is fixedly sleeved on the top of the stirring main shaft, a plurality of stirring rods are arranged on the circumferential surface of the stirring main shaft, and a plurality of stirring side rods are arranged on the stirring rods.

[0007] Preferably, the filtering and recycling mechanism comprises two fixed plates fixed on the inner wall of the crushing box and symmetrically arranged along the central axis of the crushing box, the fixed plates are arranged obliquely, the top of the fixed plates is provided with a plurality of first springs, the top of the first spring is fixedly provided with a filter plate, the filter plate is rotatably provided with two symmetrically arranged belts above, one rotating shaft of the belts extends out of the crushing box and is fixedly sleeved with a driving gear connected with the first gear, a plurality of impact blocks and scraping strips are fixedly arranged on the belt, and the bottom of the upper surface of the filter plate is provided with a protrusion matched with the impact block.

[0008] Preferably, the inner wall of the crushing box is rotatably provided with an elastic door, the elastic door is arranged at the highest position of the obliquely arranged filter plate, the side wall of the crushing box is provided with a mounting plate, and a plurality of second springs are arranged between the mounting plate and the elastic door.

[0009] Preferably, the circulating mechanism comprises a coal inlet pipe arranged on the side wall of the crushing box, one end of the coal inlet pipe is communicated with the gap of the elastic door when the elastic door is opened, the other end is communicated with a circulating pipe, the top of the circulating pipe is communicated with a coal outlet pipe, the coal outlet pipe is arranged above the second coal inlet hopper, a screw blade is rotatably arranged in the circulating pipe, and a motor is fixedly arranged at the bottom of the circulating pipe, the output end of the motor is in transmission connection with the main shaft of the screw blade.

[0010] Preferably, the secondary crushing mechanism comprises misaligned supporting plates and inclined plates arranged on the side wall of the crushing box, a plurality of leakage holes are arranged in the side wall of the crushing box at the lowest end of the filter plate, the supporting plates are arranged on the side wall of the crushing box below the leakage holes, the bottom end of the supporting plates and the inclined plates is rotatably provided with two second crushing rollers matched with each other on the inner wall of the crushing box, one end of the upper second crushing roller extends out of the crushing box and is fixedly sleeved with a second gear, and is in transmission connection with the rotating shaft of the belt through a second synchronous belt, one end of the lower second crushing roller extends out of the crushing box and is fixedly sleeved with a third gear, and is in transmission connection with the upper second crushing roller through a third synchronous belt, and the inner wall of the crushing box below the filter plate and the inclined plate is provided with an inclined coal outlet plate.

[0011] The advantages of the present application are that: the multi-stage coal crushing device in the application can mix the coal uniformly in the crushing process through the setting of the stirring mechanism, avoids the local over-crushing or non-crushing condition, and makes the coal more easily crushed by impacting the coal, improves the crushing effect, makes the uncrushed coal re-enter the crushing process through the setting of the circulating mechanism, reduces the resource waste, makes the coal raw material pass through primary crushing and secondary crushing through the setting of the multi-stage crushing mechanism, the crushing effect is more thorough, the crushing efficiency is improved, the uniformity of the coal crushing size is ensured, and the crushing quality of the device is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 、 2 is a structural schematic diagram of different perspectives of the application.

[0013] Figure 3 is a structural schematic diagram of the stirring mechanism in the application.

[0014] Figure 4 is a structural schematic diagram of the filtering and recycling mechanism in the application.

[0015] Figure 5 is a sectional view of the application.

[0016] Figure 6 is a structural schematic diagram of the secondary crushing mechanism in the application.

[0017] Among them, 100, crushing box; 101, first coal hopper; 102, first gear; 103, mounting frame; 104, driving motor; 105, first synchronous belt; 106, first crushing roller; 200, stirring mechanism; 201, side plate; 202, rotating shaft; 203, main bevel gear; 204, auxiliary bevel gear; 205, stirring main shaft; 206, stirring rod; 207, stirring side rod; 300, circulating mechanism; 301, coal inlet pipe; 302, motor; 303, circulating pipe; 304, coal outlet pipe; 305, second coal hopper; 306, auger blade; 400, filtering and recycling mechanism; 401, driving gear; 402, filter plate; 403, belt; 404, impact block; 405, scraping strip; 406, protrusion; 407, first spring; 408, fixed plate; 409, elastic door; 410, second spring; 411, mounting plate; 500, secondary crushing mechanism; 501, second synchronous belt; 502, third synchronous belt; 503, leakage hole; 504, receiving plate; 505, second crushing roller; 506, inclined plate; 507, second gear; 508, third gear; 509, coal outlet plate. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purposes and effects achieved by the application easy to understand, the application will be further described below in combination with specific embodiments.

[0019] As Figures 1 to 6As shown, a multi-stage coal crushing device, including a crushing box 100, the top of the crushing box 100 is provided with a first coal hopper 101 and a second coal hopper 305, the inner wall of the crushing box 100 is rotatably provided with a plurality of first crushing rollers 106 at the bottom end, one end of each first crushing roller 106 penetrates to the outside of the crushing box 100 and is fixedly provided with a first gear 102 connected with each other, the outer wall of the crushing box 100 is fixedly provided with a mounting bracket 103, the mounting bracket 103 is provided with a driving motor 104, the output end of the driving motor 104 is drivingly connected with the end of one of the first crushing rollers 106, the output end of the driving motor 104 is drivingly connected with a stirring mechanism 200 capable of uniformly mixing coal through a first synchronous belt 105, the inner wall of the crushing box 100 at the bottom of the first crushing roller 106 is provided with a filtering and recycling mechanism 400 for filtering and recycling the coal crushed for the first time, the highest end of the filtering and recycling mechanism 400 is communicated with a circulating mechanism 300 for transporting the coal not crushed, and the lowest end of the filtering and recycling mechanism 400 is provided with a secondary crushing mechanism 500 capable of crushing the coal again.

[0020] The driving motor 104 is started, and the output end drives one of the first crushing rollers 106 to rotate, and all the first crushing rollers 106 rotate synchronously through the first gears 102 engaged with each other to crush the coal for the first time.

[0021] In this embodiment, the stirring mechanism 200 includes two side plates 201 provided on the top of the crushing box 100, a rotating shaft 202 is rotatably arranged between the side walls of the side plates 201, the rotating shaft 202 is drivingly connected with the output end of the driving motor 104 through the first synchronous belt 105, a main bevel gear 203 is fixedly provided on the shaft of the rotating shaft 202, a stirring main shaft 205 is rotatably provided through the top of the crushing box 100, a secondary bevel gear 204 is fixedly provided on the top of the stirring main shaft 205 and engaged with the main bevel gear 203, a plurality of stirring rods 206 are provided on the circumferential surface of the stirring main shaft 205, and a plurality of stirring side rods 207 are provided on the stirring rods 206.

[0022] While the driving motor 104 rotates, the rotating shaft 202 of the stirring mechanism 200 is driven to rotate through the first synchronous belt 105, the main bevel gear 203 on the rotating shaft 202 is engaged with the secondary bevel gear 204 on the stirring main shaft 205, the stirring main shaft 205 and the stirring rods 206 and the stirring side rods 207 thereon are driven to rotate, the coal is stirred to ensure uniform mixing of the coal, the coal is impacted to make it easier to be crushed, and the crushing effect is improved.

[0023] In the embodiment, the filtering and recycling mechanism 400 comprises two fixed plates 408 fixed on the inner wall of the crushing box 100 and symmetrically arranged along the central axis of the crushing box 100, the fixed plates 408 are arranged obliquely, the top of the fixed plates 408 is provided with a plurality of first springs 407, the top of the first springs 407 is fixedly provided with a filtering plate 402, the filtering plate 402 is rotatably provided with two symmetrically arranged belts 403 above, the rotating shaft of one of the belts 403 extends to the outside of the crushing box 100 and is fixedly sleeved with a driving gear 401 which is meshingly connected with the first gear 102, a plurality of impact blocks 404 and scraping strips 405 are fixedly arranged on the belt 403, the bottom of the upper surface of the filtering plate 402 is provided with protrusions 406 matched with the impact blocks 404, the inner wall of the crushing box 100 is rotatably provided with an elastic door 409, the elastic door 409 is arranged at the highest position of the obliquely arranged filtering plate 402, and the side wall of the crushing box 100 is provided with a mounting plate 411, a plurality of second springs 410 are arranged between the mounting plate 411 and the elastic door 409.

[0024] The coal after primary crushing falls on the filtering plate 402, the impact blocks 404 and the scraping strips 405 on the belt 403 rotate under the drive of the driving gear 401, the impact blocks 404 impact the protrusions 406 on the surface of the filtering plate 402, the filtering plate 402 is shaken through the first springs 407, which helps the fine particles to pass through the filtering plate 402, the uncrushed coal on the filtering plate 402 is scraped by the scraping strips 405, the large particle coal is transported to the highest end of the obliquely arranged filtering plate 402, the elastic door 409 is pressed, and the elastic door 409 is opened under the action of the second springs 410, the coal falls into the circulating mechanism 300, the uniformity of the crushing size of the coal is ensured, and the crushing quality of the device is enhanced.

[0025] In the embodiment, the circulating mechanism 300 comprises an inlet pipe 301 arranged on the side wall of the crushing box 100, one end of the inlet pipe 301 is in communication with the gap of the elastic door 409 when the elastic door 409 is opened, the other end is in communication with a circulating pipe 303, the top of the circulating pipe 303 is in communication with an outlet pipe 304, the outlet pipe 304 is arranged above a second inlet hopper 305, a spiral blade 306 is rotatably arranged in the circulating pipe 303, and a motor 302 is fixedly arranged at the bottom of the circulating pipe 303, the output end of the motor 302 is in transmission connection with the main shaft of the spiral blade 306.

[0026] The motor 302 is started to drive the spiral blade 306 in the circulating pipe 303 to rotate, the uncrushed coal is sent back to the second inlet hopper 305 through the circulating pipe 303 and the outlet pipe 304 for re-crushing, so that the uncrushed coal can re-enter the crushing process, and resource waste is reduced.

[0027] In the embodiment, the secondary crushing mechanism 500 comprises a receiving plate 504 and an inclined plate 506 arranged in a staggered manner on the side wall of the crushing box 100. A plurality of holes 503 are formed in the side wall of the crushing box 100 at the lowest end of the filter plate 402. The receiving plate 504 is arranged on the side wall of the crushing box 100 below the holes 503. The inner wall of the crushing box 100 at the bottom end of the receiving plate 504 and the inclined plate 506 is rotatably provided with two second crushing rollers 505 matched with each other. One end of the upper second crushing roller 505 extends out of the crushing box 100 and is fixedly sleeved with a second gear 507. The second gear 507 is drivingly connected with the rotating shaft of the belt 403 through a second synchronous belt 501. One end of the lower second crushing roller 505 extends out of the crushing box 100 and is fixedly sleeved with a third gear 508. The third gear 508 is drivingly connected with the upper second crushing roller 505 through a third synchronous belt 502. An inclined coal discharging plate 509 is arranged between the inner wall of the crushing box 100 below the filter plate 402 and the inclined plate 506.

[0028] Medium-sized coal particles enter the receiving plate 504 through the holes 503. The second crushing rollers 505 below the receiving plate 504 rotate under the driving of the second gear 507, the third gear 508, the second synchronous belt 501 and the third synchronous belt 502 to crush the coal particles again. The crushed coal particles are discharged through the coal discharging plate 509. The design of the multi-stage crushing mechanism enables the coal raw material to be crushed for multiple times, so that the crushing effect is more thorough and the crushing efficiency is improved.

[0029] Working process and principle: when the device is used, the coal raw material enters the crushing box 100 through the first coal inlet hopper 101, the driving motor 104 is started, the output end drives a first crushing roller 106 to rotate, all the first crushing rollers 106 rotate synchronously through the first gear 102, the coal is preliminarily crushed, the driving motor 104 rotates at the same time, the rotating shaft 202 of the stirring mechanism 200 is driven to rotate through the first synchronous belt 105, the main bevel gear 203 on the rotating shaft 202 is engaged with the auxiliary bevel gear 204 on the stirring main shaft 205, the stirring main shaft 205, the stirring rod 206 and the stirring side rod 207 are driven to rotate, the coal is stirred to ensure that the coal is uniformly mixed, the coal is impacted to make the coal more easily crushed, the preliminarily crushed coal falls on the filter plate 402, the impact block 404 and the scraping strip 405 on the belt 403 rotate under the drive of the driving gear 401, the impact block 404 impacts the protrusions 406 on the surface of the filter plate 402, the filter plate 402 is driven to vibrate through the first spring 407, the fine particles are helped to pass through the filter plate 402, the uncrushed coal on the filter plate 402 is scraped by the scraping strip 405 and transported to the highest end of the filter plate 402 arranged in an inclined manner, the elastic door 409 is extruded, the elastic door 409 is opened under the action of the second spring 410, the coal falls into the circulating mechanism 300, the motor 302 is started, the auger blade 306 in the circulating pipe 303 is driven to rotate, the uncrushed coal is sent back to the second coal inlet hopper 305 through the circulating pipe 303 and the coal outlet pipe 304 for secondary crushing, so that the uncrushed coal can re-enter the crushing process, resource waste is reduced, the medium-sized coal particles pass through the leakage hole 503 into the receiving plate 504, the second crushing roller 505 below the receiving plate 504 rotates under the drive of the second gear 507, the third gear 508, the second synchronous belt 501 and the third synchronous belt 502, and the coal is crushed for the second time, the crushed coal is discharged through the coal outlet plate 509, through the design of the multi-stage crushing mechanism, the coal raw material is crushed for multiple times, the crushing effect is more thorough, the crushing efficiency is improved, the uniformity of the crushed coal size is ensured, and the crushing quality of the device is enhanced.

[0030] It is to be understood by those skilled in the art that the present application can be implemented by other embodiments without departing from the spirit or essential characteristics thereof. Therefore, the above-mentioned disclosed embodiments are only examples in all aspects, and are not the only ones. All changes within the scope of the present application or within the scope equivalent to the present application are included in the present application.

Claims

1. A multi-stage coal pulverizing device, characterized by: The utility model relates to a pulverizer, which comprises a pulverizer box (100) having a first coal feeding hopper (101) and a second coal feeding hopper (305) at the top thereof, a plurality of first pulverizer rollers (106) rotatably arranged at the bottom of the inner wall of the pulverizer box (100), one end of each first pulverizer roller (106) penetrating out of the pulverizer box (100) and fixedly sleeving a first gear (102) connected with each other, a mounting bracket (103) fixedly arranged on the outer wall of the pulverizer box (100), a driving motor (104) arranged on the mounting bracket (103), the output end of the driving motor (104) being in transmission connection with the end of one of the first pulverizer rollers (106), the output end of the driving motor (104) being in transmission connection with a stirring mechanism (200) capable of uniformly mixing coal through a first synchronous belt (105), the inner wall of the pulverizer box (100) at the bottom of the first pulverizer roller (106) being provided with a filtering and recycling mechanism (400) for filtering and recycling the coal pulverized for the first time, the highest end of the filtering and recycling mechanism (400) being in communication with a circulating mechanism (300) for transporting the coal not pulverized, the lowest end of the filtering and recycling mechanism (400) being provided with a secondary pulverizing mechanism (500) capable of pulverizing the coal for the second time. The filtering and recycling mechanism (400) comprises two fixed plates (408) fixedly arranged on the inner wall of the pulverizer box (100) and symmetrically arranged along the central axis of the pulverizer box (100), the fixed plates (408) being obliquely arranged, the top of each fixed plate (408) being provided with a plurality of first springs (407), the top of each first spring (407) being fixedly provided with a filter plate (402), two symmetrically arranged belts (403) being rotatably arranged above the filter plate (402), the rotating shaft of one of the belts (403) extending out of the pulverizer box (100) and fixedly sleeving a driving gear (401) in meshing connection with the first gear (102), a plurality of impact blocks (404) and scraping strips (405) being fixedly arranged on the belt (403), the bottom of the upper surface of the filter plate (402) being provided with a protrusion (406) matched with the impact block (404). The inner wall of the pulverizer box (100) is rotatably provided with an elastic door (409), the elastic door (409) being arranged at the highest position of the obliquely arranged filter plate (402), the side wall of the pulverizer box (100) being provided with a mounting plate (411), a plurality of second springs (410) being arranged between the mounting plate (411) and the elastic door (409). The secondary crushing mechanism (500) comprises the misaligned receiving plates (504) and inclined plates (506) arranged on the side wall of the crushing box (100), a plurality of leakage holes (503) are arranged on the side wall of the crushing box (100) at the lowest end of the filter plate (402), the receiving plate (504) is arranged on the side wall of the crushing box (100) below the leakage hole (503), the bottom end of the receiving plate (504) and the inclined plate (506) is rotatably provided with two second crushing rollers (505) matched with each other in the inner wall of the crushing box (100), one end of the upper second crushing roller (505) extends to the outside of the crushing box (100) and is fixedly sleeved with a second gear (507), and the second gear (507) is driven by the rotating shaft of the second synchronous belt (501) and the belt (403), one end of the lower second crushing roller (505) extends to the outside of the crushing box (100) and is fixedly sleeved with a third gear (508), and the third gear (508) is driven by the third synchronous belt (502) and the upper second crushing roller (505), and the inner wall of the crushing box (100) below the filter plate (402) and the inclined plate (506) is provided with an inclined coal discharging plate (509).

2. A multi-stage coal pulverizing device according to claim 1, characterized in that: The stirring mechanism (200) comprises two side plates (201) arranged on the top of the crushing box (100), a rotating shaft (202) is rotatably arranged between the side walls of the side plate (201), the rotating shaft (202) is drivingly connected with the output end of the driving motor (104) through the first synchronous belt (105), a main bevel gear (203) is fixedly sleeved on the shaft body of the rotating shaft (202), a stirring main shaft (205) is rotatably arranged on the top of the crushing box (100), a secondary bevel gear (204) meshingly connected with the main bevel gear (203) is fixedly sleeved on the top of the stirring main shaft (205), a plurality of stirring rods (206) are arranged on the circumferential surface of the stirring main shaft (205), and a plurality of stirring side rods (207) are arranged on the stirring rods (206).

3. The multi-stage coal pulverizing device according to claim 1, characterized in that: The circulating mechanism (300) comprises an inlet pipe (301) arranged on the side wall of the crushing box (100), one end of the inlet pipe (301) is communicated with the gap of the elastic door (409) when the elastic door (409) is opened, the other end is communicated with a circulating pipe (303), the top of the circulating pipe (303) is communicated with an outlet pipe (304), the outlet pipe (304) is arranged above the second inlet hopper (305), a spiral blade (306) is rotatably arranged in the circulating pipe (303), and a motor (302) is fixedly arranged at the bottom of the circulating pipe (303). The output end of the motor (302) is drivingly connected with the main shaft of the spiral blade (306).

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