Multi-stage coal crushing device

Abstract

The invention discloses a multistage coal crushing device, and relates to the technical field of coal processing, the multistage coal crushing device comprises a crushing box, the top of the crushing box communicates with a first coal feeding hopper and a second coal feeding hopper, and the bottom end of the inner wall of the crushing box is rotatably provided with a plurality of first crushing rollers; one end of each first crushing roller penetrates out of the crushing box and is fixedly sleeved with first gears which are in meshed connection with each other, a mounting frame is fixedly arranged on the outer wall of the crushing box, a driving motor is arranged on the mounting frame, and the output end of the driving motor is in transmission connection with the end of one first crushing roller; a filtering and recycling mechanism used for filtering coal subjected to primary smashing is arranged on the inner wall of the portion, at the bottom of the first smashing roller, of the smashing box, a secondary smashing mechanism capable of smashing the coal again is arranged at the lowest end of the filtering and recycling mechanism, and by arranging the multiple stages of smashing mechanisms, coal raw materials are subjected to primary smashing and secondary smashing, and the smashing 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.

Description

Technical Field

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

[0002] In the process of coal mining and processing, coal crushing plays a pivotal role. Only after fine crushing can raw coal or bituminous coal enter the subsequent processing and handling procedures smoothly 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 pulverizers to pulverize coal, many traditional coal crushing devices still have obvious shortcomings in practical applications. These devices not only have unsatisfactory crushing effects, but also often cause serious unevenness in the size of coal particles. This unevenness not only brings additional difficulties to subsequent coal screening, washing and other processes, but may also lead to reduced production efficiency and increased costs. Summary of the invention

[0004] The object of the present invention is to provide a multi-stage coal crushing device to solve the problem that the existing coal crushing devices have poor crushing effect, easily cause serious unevenness in coal particle size, and reduce production efficiency.

[0005] A multi-stage coal crushing device comprises a crushing box, wherein a first coal feed hopper and a second coal feed hopper are connected at the top of the crushing box, a plurality of first crushing rollers are rotatably arranged at the bottom end of the inner wall of the crushing box, one end of each first crushing roller passes through the outside of the crushing box and is fixedly sleeved with a first gear that is meshed with each other, a mounting frame is fixedly arranged on the outer wall of the crushing box, a driving motor is arranged on the mounting frame, the output end of the driving motor is transmission-connected to the end of one of the first crushing rollers, the output end of the driving motor is transmission-connected to a stirring mechanism that can mix the coal evenly through a first synchronous belt, a filtering and recovering mechanism for filtering the initially crushed coal is arranged on the inner wall of the crushing box at the bottom of the first crushing roller, the highest end of the filtering and recovering mechanism is connected to a circulation mechanism for transporting uncrushed coal, and the lowest end of the filtering and recovering mechanism is provided with a secondary crushing mechanism that can crush the coal again.

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

[0007] Preferably, the filtering and recovering mechanism includes two fixing plates fixed to the inner wall of the crushing box and symmetrically arranged along the central axis of the crushing box, the fixing plates are arranged at an incline, a plurality of first springs are arranged on the top of the fixing plates, a filter plate is fixedly arranged on the top of the first spring, two symmetrically arranged belts are rotatably arranged above the filter plate, a rotating shaft of one of the belts extends to the outside of the crushing box and is fixedly sleeved with a driving gear meshing with the first gear, a plurality of impact blocks and scraping strips are fixed on the belt, and a protrusion matching the impact block is provided on the bottom of the upper surface of the filter plate.

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

[0009] Preferably, the circulation mechanism includes a coal feed pipe arranged on the side wall of the crushing box, one end of the coal feed pipe is connected to the notch when the elastic door is opened, and the other end is connected to a circulation pipe, and the top of the circulation pipe is connected to a coal outlet pipe, and the coal outlet pipe is arranged above the second coal feed hopper, and an auger blade is rotatably arranged in the circulation pipe, and a motor is fixedly arranged at the bottom of the circulation pipe, and the output end of the motor is transmission-connected to the main shaft of the auger blade.

[0010] Preferably, the secondary crushing mechanism includes a receiving plate and an inclined plate which are staggered and arranged on the side walls of the crushing box, a plurality of leakage holes are opened on the side wall of the crushing box at the lowest end of the filter plate, the receiving plate is arranged on the side wall of the crushing box below the leakage holes, and two matching second crushing rollers are provided for rotating on the inner wall of the crushing box at the receiving plate and the bottom end of the inclined plate, one end of the upper second crushing roller extends to the outside of the crushing box and is fixedly sleeved with a second gear, and is connected to the rotating shaft of the belt by a second synchronous belt, one end of the lower second crushing roller extends to the outside of the crushing box and is fixedly sleeved with a third gear, and is connected to the upper second crushing roller through a third synchronous belt, and an inclined coal outlet plate is provided between the inner wall of the crushing box below the filter plate and the inclined plate.

[0011] The advantages of the present invention are: a multi-stage coal crushing device in the present invention, by setting a stirring mechanism, can mix the coal evenly during the crushing process, avoiding local over-crushing or under-crushing, and at the same time impacting the coal, making the coal easier to crush and improving the crushing effect; by setting a circulation mechanism, the uncrushed coal can re-enter the crushing process, reducing resource waste; by setting a multi-stage crushing mechanism, the coal raw material undergoes primary crushing and secondary crushing, 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 THE DRAWINGS

[0012] Figure 1 , 2 It is a schematic diagram of the structure of the present invention from different viewing angles.

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

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

[0015] Figure 5 It is a cross-sectional view of the present invention.

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

[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, secondary bevel gear; 205, stirring main shaft; 206, stirring rod; 207, stirring side rod; 300, circulation mechanism; 301, coal inlet pipe; 302, motor; 303, circulation pipe; 304, coal outlet pipe; 305, second coal inlet hopper; 306, auger Blade; 400, filtering and recovering mechanism; 401, driving gear; 402, filtering plate; 403, belt; 404, impact block; 405, scraper; 406, protrusion; 407, first spring; 408, fixing 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, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0019] like Figures 1 to 6As shown, a multi-stage coal crushing device includes a crushing box 100, the top of the crushing box 100 is connected to a first coal feeding hopper 101 and a second coal feeding hopper 305, a plurality of first crushing rollers 106 are rotatably arranged at the bottom of the inner wall of the crushing box 100, one end of each first crushing roller 106 passes through the outside of the crushing box 100 and is fixedly sleeved with a first gear 102 that is meshed and connected with each other, a mounting frame 103 is fixedly arranged on the outer wall of the crushing box 100, a driving motor 104 is arranged on the mounting frame 103, and the output end of the driving motor 104 is connected to the first gear 102. The end of a first crushing roller 106 is transmission-connected, and the output end of the drive motor 104 is transmission-connected to a stirring mechanism 200 capable of evenly mixing the 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 recovering mechanism 400 for filtering the initially crushed coal, and the highest end of the filtering and recovering mechanism 400 is connected to a circulation mechanism 300 for transporting uncrushed coal, and the lowest end of the filtering and recovering mechanism 400 is provided with a secondary crushing mechanism 500 capable of crushing the coal again.

[0020] The driving motor 104 is started, and its output end drives a first crushing roller 106 to rotate. Through the mutually meshing first gears 102, all the first crushing rollers 106 rotate synchronously to perform primary crushing on the coal.

[0021] In this embodiment, the stirring mechanism 200 includes two side panels 201 arranged on the top of the crushing box 100, and a rotating shaft 202 is rotatably provided between the side walls of the side panels 201. The rotating shaft 202 is connected to the output end of the driving motor 104 through a 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 provided through the top of the crushing box 100, and a secondary bevel gear 204 meshingly connected to the main bevel gear 203 is fixedly sleeved on the top of the stirring main shaft 205. 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 rod 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 meshed with the secondary bevel gear 204 on the stirring main shaft 205, driving the stirring main shaft 205 and the stirring rod 206 and the stirring side rod 207 thereon to rotate, stirring the coal to ensure that the coal is mixed evenly, and impacting the coal, making the coal easier to be crushed, thereby improving the crushing effect.

[0023] In this embodiment, the filtering and recycling mechanism 400 includes two fixed plates 408 fixedly arranged 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, a plurality of first springs 407 are arranged on the top of the fixed plates 408, a filter plate 402 is fixedly arranged on the top of the first spring 407, and two symmetrically arranged belts 403 are rotatably arranged above the filter plate 402, the rotating shaft of one of the belts 403 extends to the outside of the crushing box 100 and is fixedly sleeved with a first gear. The drive gear 401 is meshed with the wheel 102, and a plurality of impact blocks 404 and scraper strips 405 are fixedly arranged on the belt 403. The bottom of the upper surface of the filter plate 402 is provided with a protrusion 406 adapted to the impact block 404. The inner wall of the crushing box 100 is rotatably provided with an elastic door 409, and the elastic door 409 is arranged at the highest end position of the inclined filter plate 402. The side wall of the crushing box 100 is provided with a mounting plate 411, and a plurality of second springs 410 are arranged between the mounting plate 411 and the elastic door 409.

[0024] The coal after the initial crushing falls on the filter plate 402, and the impact block 404 and the scraper bar 405 on the belt 403 rotate under the drive of the driving gear 401. The impact block 404 hits the protrusion 406 on the surface of the filter plate 402, and drives the filter plate 402 to vibrate through the first spring 407, thereby helping fine particles to pass through the filter plate 402. The scraper bar 405 is used to scrape the uncrushed coal on the filter plate 402, and the large particles of coal are transported to the highest end of the inclined filter plate 402, squeezing the elastic door 409. The elastic door 409 is opened under the action of the second spring 410, and the coal falls into the circulation mechanism 300, thereby ensuring the uniformity of the coal crushing size and enhancing the crushing quality of the device.

[0025] In this embodiment, the circulation mechanism 300 includes a coal feed pipe 301 arranged on the side wall of the crushing box 100, one end of the coal feed pipe 301 is connected to the notch when the elastic door 409 is opened, and the other end is connected to a circulation pipe 303, and the top of the circulation pipe 303 is connected to a coal outlet pipe 304, and the coal outlet pipe 304 is arranged above the second coal feed hopper 305. An auger blade 306 is rotatably provided in the circulation pipe 303, and a motor 302 is fixedly provided at the bottom of the circulation pipe 303, and the output end of the motor 302 is connected to the main shaft transmission of the auger blade 306.

[0026] The motor 302 is started, driving the auger blade 306 in the circulation pipe 303 to rotate, and sending the uncrushed coal back to the second coal hopper 305 through the circulation pipe 303 and the coal outlet pipe 304 for re-crushing, so that the uncrushed coal can re-enter the crushing process, reducing resource waste.

[0027] In this embodiment, the secondary crushing mechanism 500 includes a receiving plate 504 and an inclined plate 506 which are arranged on the side wall of the crushing box 100. The side wall of the crushing box 100 at the lowest end of the filter plate 402 is provided with a plurality of leak holes 503. The receiving plate 504 is arranged on the side wall of the crushing box 100 below the leak holes 503. The inner wall of the crushing box 100 at the bottom of the receiving plate 504 and the inclined plate 506 is provided with two second crushing rollers 505 which are matched with each other. The second crushing roller 505 at the upper end is provided with a plurality of leak holes 503. One end of the second crushing roller 505 extends to the outside of the crushing box 100 and is fixedly sleeved with a second gear 507, and is connected to the rotating shaft of the belt 403 by a second synchronous belt 501. One end of the second crushing roller 505 below extends to the outside of the crushing box 100 and is fixedly sleeved with a third gear 508, and is connected to the second crushing roller 505 above by a third synchronous belt 502. An inclined coal outlet plate 509 is provided 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 leakage hole 503. The second crushing roller 505 under 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 to crush the coal for the second time. The crushed coal is discharged through the coal outlet plate 509. The design of the multi-stage crushing mechanism allows the coal raw materials to be crushed multiple times, the crushing effect is more thorough, and the crushing efficiency is improved.

[0029] Working process and principle: When the device is in use, the coal raw material enters the crushing box 100 through the first coal hopper 101, and the drive motor 104 is started. The output end of the drive motor 104 drives a first crushing roller 106 to rotate. Through the first gears 102 that mesh with each other, all the first crushing rollers 106 rotate synchronously to perform the initial crushing of the coal. While the drive motor 104 rotates, the first synchronous belt 105 drives the rotating shaft 202 of the stirring mechanism 200 to rotate, and the main bevel gear 203 on the rotating shaft 202 and the secondary bevel gear on the stirring main shaft 205 are rotated. The first spring 407 is engaged with the stirring main shaft 205, and the stirring rod 206 and the stirring side rod 207 thereon are driven to rotate, so as to stir the coal, ensure that the coal is evenly mixed, and collide with the coal to make the coal easier to be crushed. The coal after the initial crushing falls on the filter plate 402, and the impact block 404 and the scraper bar 405 on the belt 403 rotate under the drive of the driving gear 401. The impact block 404 hits the protrusion 406 on the surface of the filter plate 402, and drives the filter plate 402 to vibrate through the first spring 407, so as to help fine particles pass through the filter plate 40 2. Use the scraper bar 405 to scrape the uncrushed coal on the filter plate 402, transport the large particles of coal to the highest end of the filter plate 402, squeeze the elastic door 409, and the elastic door 409 opens under the action of the second spring 410, and the coal falls into the circulation mechanism 300. The motor 302 starts, driving the auger blade 306 in the circulation pipe 303 to rotate, and the uncrushed coal is sent back to the second coal hopper 305 through the circulation pipe 303 and the coal outlet pipe 304 for re-crushing, so that the uncrushed coal can re-enter the crushing process, reducing Resources are wasted. Medium-sized coal particles enter the receiving plate 504 through the leakage hole 503. The second crushing roller 505 under the receiving plate 504 is driven by the second gear 507, the third gear 508, the second synchronous belt 501 and the third synchronous belt 502 to rotate, 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 coal crushing size is ensured, and the crushing quality of the device is enhanced.

[0030] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A multi-stage coal pulverizing device, characterized in that: The invention comprises a crushing box (100), wherein a first coal feed hopper (101) and a second coal feed hopper (305) are connected to each other at the top of the crushing box (100), a plurality of first crushing rollers (106) are rotatably arranged at the bottom end of the inner wall of the crushing box (100), one end of each first crushing roller (106) passes through the outside of the crushing box (100) and is fixedly sleeved with a first gear (102) that is meshed with each other, a mounting frame (103) is fixedly arranged on the outer wall of the crushing box (100), a driving motor (104) is arranged on the mounting frame (103), and an output end of the driving motor (104) is connected to one of the first The end of the crushing roller (106) is connected in a transmission manner, and the output end of the driving motor (104) is connected in a transmission manner to a stirring mechanism (200) capable of evenly mixing the 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 recovering mechanism (400) for filtering the initially crushed coal; the uppermost end of the filtering and recovering mechanism (400) is connected to a circulation mechanism (300) for transporting uncrushed coal; and the lowermost end of the filtering and recovering mechanism (400) is provided with a secondary crushing mechanism (500) capable of crushing the coal again.

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 plates (201); the rotating shaft (202) is connected to the output end of the driving motor (104) by a 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 through the top of the crushing box (100); a secondary bevel gear (204) meshingly connected to 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 rod (206).

3. A multi-stage coal pulverizing device according to claim 1, characterized in that: The filtering and recovering mechanism (400) comprises two fixing plates (408) fixedly arranged on the inner wall of the crushing box (100) and symmetrically arranged along the central axis of the crushing box (100); the fixing plates (408) are arranged obliquely; a plurality of first springs (407) are arranged on the top of the fixing plates (408); a filter plate (402) is fixedly arranged on the top of the first springs (407); two symmetrically arranged belts (403) are rotatably arranged above the filter plate (402); a 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) meshingly connected with the first gear (102); a plurality of impact blocks (404) and scraping strips (405) are fixedly arranged on the belt (403); and a protrusion (406) adapted to the impact block (404) is provided at the bottom of the upper surface of the filter plate (402).

4. A multi-stage coal pulverizing device according to claim 3, characterized in that: The inner wall of the crushing box (100) is rotatably provided with an elastic door (409), and the elastic door (409) is arranged at the highest end position of the inclined filter plate (402). The side wall of the crushing box (100) is provided with a mounting plate (411), and a plurality of second springs (410) are arranged between the mounting plate (411) and the elastic door (409).

5. A multi-stage coal pulverizing device according to claim 4, characterized in that: The circulation mechanism (300) comprises a coal inlet pipe (301) arranged on the side wall of the crushing box (100); one end of the coal inlet pipe (301) is connected to the notch when the elastic door (409) is opened, and the other end is connected to a circulation pipe (303); the top of the circulation pipe (303) is connected to a coal outlet pipe (304); the coal outlet pipe (304) is arranged above the second coal inlet hopper (305); an auger blade (306) is rotatably arranged in the circulation pipe (303); a motor (302) is fixedly arranged at the bottom of the circulation pipe (303); the output end of the motor (302) is drivingly connected to the main shaft of the auger blade (306).

6. The multi-stage coal pulverizing device according to claim 3, characterized in that: The secondary crushing mechanism (500) comprises a receiving plate (504) and an inclined plate (506) which are arranged on the side wall of the crushing box (100) in a staggered manner. The side wall of the crushing box (100) at the lowest end of the filter plate (402) is provided with a plurality of leakage holes (503). The receiving plate (504) is arranged on the side wall of the crushing box (100) below the leakage holes (503). The inner wall of the crushing box (100) at the bottom of the receiving plate (504) and the inclined plate (506) is provided with two second crushing rollers (505) which are matched with each other. 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 is connected to the rotating shaft of the belt (403) by means of a second synchronous belt (501); one end of the second crushing roller (505) below extends to the outside of the crushing box (100) and is fixedly sleeved with a third gear (508), and is connected to the second crushing roller (505) above by means of a third synchronous belt (502); an inclined coal outlet plate (509) is provided between the inner wall of the crushing box (100) below the filter plate (402) and the inclined plate (506).

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