Multi-stage crushing device for washing raw coal

Abstract

The invention relates to the technical field of raw coal washing and separation, and discloses a multi-stage crushing device for raw coal washing and separation, which comprises a shell, a feeding frame arranged at the top end of the shell, a crushing roller rotationally connected in the shell, a filter screen arranged in the shell, a conveying belt arranged on one side of the shell, and a screening assembly rotationally connected in the shell, crushed coal briquettes fall onto a filter screen and a sieve plate, small particles enter the next link through the filter screen, large coal briquettes circulate back to a feeding frame through the sieve plate to be crushed again, the coal briquettes subjected to primary crushing are subjected to reciprocating motion of an arc plate to be matched with a guide plate to achieve secondary extrusion crushing, then the coal briquettes fall onto a first separation plate and a second separation plate, and classification screening is completed through vertical reciprocating motion of the separation plates. Meanwhile, coal briquettes on the surface of the separation plate make contact with nail blocks at the bottom end of the arc plate to achieve re-crushing, and the nail blocks can dredge separation plate holes. According to the device, through cooperation of multi-stage crushing and graded screening, the raw coal crushing uniformity and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing and sorting raw coal, and particularly relates to a multi-stage crushing device for washing and sorting raw coal. BACKGROUND

[0002] Raw coal enters the coal washing plant from the coal storage yard, and the initial particle size is not uniform, and there are a large number of oversized materials exceeding the washing and sorting requirements. If only single-stage crushing is relied on, it is difficult to fully crush these large pieces of raw coal to the required particle size. The crushing force and precision of single-stage crushing are limited, and when facing raw coal of different hardness and particle size, the crushing may not be complete and the dissociation may not be sufficient, which may lead to large pieces of medium coal and loss of clean coal. In the raw coal processing process of the coal washing plant, the raw coal is usually stored in the coal storage yard, and is fed into the belt conveyor by the coal pit feeder according to the coal blending scheme. After being transported to the raw coal preparation workshop, the raw coal is first subjected to classification treatment by a classification screen. The raw coal is crushed after being sorted. The crushing equipment used in the coal washing plant is mainly a toothed roll crusher.

[0003] In view of the above and the prior art, the present application has the following defects: the existing multi-stage crushing device for washing and sorting raw coal is not thorough enough, and the processing capacity of many devices for large pieces of coal is limited. Large pieces of coal often directly mix into subsequent links, resulting in uneven size of crushed coal, affecting the subsequent washing and sorting effect, and being difficult to classify according to the coal particle size requirement. At the same time, the crushed coal is often not further refined, resulting in poor dissociation effect, more loss of clean coal during subsequent washing and sorting, and affecting the yield and quality stability. SUMMARY

[0004] The technical problem to be solved by the present application is that the multi-stage crushing of raw coal in the prior art is not thorough enough, resulting in uneven size of crushed coal. To solve this problem, the present application provides a multi-stage crushing device for washing and sorting raw coal.

[0005] In order to achieve the above object, the technical scheme adopted by the present application is as follows: A multi-stage crushing device for washing and screening raw coal comprises a shell, a feeding frame arranged at the top end of the shell, a crushing roller rotatably connected in the shell, a filter screen arranged in the shell, a conveying belt arranged on one side of the shell, and a screening assembly rotatably connected in the shell, wherein the screening assembly comprises sieve plates rotatably connected on both sides of the filter screen, and the sieve plates are inclined, and a crushing structure is further rotatably connected in the shell, wherein the crushing structure comprises a reciprocating moving part rotatably connected in the shell, and an arc plate is arranged on one side of the reciprocating moving part, and a guide plate is arranged in the shell corresponding to the arc plate, and the reciprocating arc plate and the guide plate are in contact to crush the coal blocks, and a secondary crushing and sorting structure is further slidably connected in the shell, wherein the secondary crushing and sorting structure comprises a first partition plate and a second partition plate slidably connected in the shell, and the first partition plate and the second partition plate slide up and down, and holes are arranged on the surface of the first partition plate, and the diameter of the holes of the first partition plate is larger than the diameter of the holes of the second partition plate, and the first partition plate is in contact with the bottom end of the arc plate to crush the coal blocks, and the coal blocks are crushed in multiple stages through the crushing structure and the secondary crushing and sorting structure.

[0006] Preferably, a servo motor is fixedly installed on one side of the shell, the output end of the servo motor extends to the inside of the shell, the output end of the servo motor is provided with a gear set, the gear set is reversely meshed and connected, and the gear set is connected with the crushing roller.

[0007] Preferably, the screening assembly comprises a groove arranged in the inner wall of the shell, and an electric push rod is arranged in the groove, and the output end of the electric push rod is provided with a rack, and the rack is slidably connected with the inner wall of the shell.

[0008] Preferably, the two sides of the sieve plate are provided with rotating rods, the outer side of the rotating rod is provided with a driven wheel, the driven wheel is meshed and connected with the rack, and an opening is arranged on the surface of the shell, and a baffle is rotatably connected in the opening.

[0009] Preferably, a rotating column is rotatably connected in the shell, a belt is sleeved on the output surface of the servo motor and the rotating column, one side of the rotating column is provided with a rotating disc, and the surface of the rotating disc is provided with a protruding block.

[0010] Preferably, a frame plate is arranged in the shell, a push plate is slidably connected in the frame plate, one end of the push plate is provided with a hollow plate, and the protruding block is slidably connected with the hollow plate.

[0011] Preferably, the other end of the push plate is provided with a connecting block, the connecting block is connected with the arc plate, the top surface of the arc plate is arc-shaped, the side surface of the arc plate is inclined, the bottom end of the arc plate is provided with a plurality of nail blocks distributed at equal intervals.

[0012] Preferably, a half gear is further arranged on the outer side of the rotating column, a side block is slidably connected in the shell, one side of the side block is provided with a gear ring, and the gear ring is meshed and connected with the half gear.

[0013] Preferably, the bottom end of the gear ring is provided with a bottom plate, one side of the bottom plate is provided with a fixed plate, and the fixed plate is connected with the first partition plate and the second partition plate.

[0014] Preferably, the inner wall of the shell is provided with a sliding groove, a sliding block is slidably connected in the sliding groove, a spring is arranged at the bottom end of the sliding block, and the spring is connected with the sliding groove.

[0015] The technical effects and advantages of the present application are as follows: the present application realizes efficient multi-stage crushing of raw coal, first, the circulating crushing structure of the filter screen and the sieve plate is used to ensure that the large coal is fully crushed, so that the substandard materials are prevented from entering the subsequent link, and the uniformity of primary crushing is improved; secondly, the same servo motor is used to drive multiple components to link, so that the power cost is saved, and the arc plate reciprocating motion is used in cooperation with the guide plate to realize secondary extrusion crushing and refine the coal particle size; finally, the grading screening design of the first partition plate and the second partition plate is combined with the crushing and dredging effect of the peg block, so that the different particle size requirements are met, the equipment is prevented from being blocked, and the continuous and stable operation is ensured. The overall device effectively improves the raw coal crushing efficiency and dissociation effect, reduces the clean coal loss in the subsequent washing and selecting link, and improves the clean coal yield and quality stability. BRIEF DESCRIPTION OF DRAWINGS

[0016] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts.

[0017] Fig. 1 It is a whole three-dimensional structure schematic diagram of the multi-stage crushing device for washing and selecting raw coal of the present application.

[0018] Fig. 2 It is a whole three-dimensional sectional structure schematic diagram of the multi-stage crushing device for washing and selecting raw coal of the present application.

[0019] Fig. 3 It is a three-dimensional structure schematic diagram of the crushing roller, gear set and servo motor of the multi-stage crushing device for washing and selecting raw coal of the present application.

[0020] Fig. 4 It is a three-dimensional structure schematic diagram of the filter screen and screening assembly of the multi-stage crushing device for washing and selecting raw coal of the present application.

[0021] Fig. 5 It is a three-dimensional structure schematic diagram of the crushing structure of the multi-stage crushing device for washing and selecting raw coal of the present application.

[0022] Fig. 6 It is a three-dimensional structure schematic diagram of the re-crushing and sorting structure of the multi-stage crushing device for washing and selecting raw coal of the present application.

[0023] Legend: 1, shell; 2, feed frame; 3, conveying belt; 4, servo motor; 5, gear set; 6, crushing roller; 7, filter screen; 8, crushing structure; 81, rotating column; 82, rotating disc; 83, protruding block; 84, hollow plate; 85, push plate; 86, frame plate; 87, connecting block; 88, arc plate; 89, peg block; 9, secondary crushing and sorting structure; 91, half gear; 92, gear ring; 93, side block; 94, bottom plate; 95, fixed plate; 96, sliding block; 97, spring; 98, first sub-plate; 99, second sub-plate; 10, belt; 11, guide plate; 12, opening; 13, screening assembly; 131, screen plate; 132, rotating rod; 133, driven wheel; 134, electric push rod; 135, rack. DETAILED DESCRIPTION

[0024] It is easy to understand that, according to the technical solution of the present application, those skilled in the art can propose various structural modes and implementation modes that can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solution of the present application, and should not be regarded as the whole or as a limitation or restriction on the technical solution of the present application.

[0025] Reference Figs. 1-6 As shown in the figure, the present application provides a technical solution: a multi-stage crushing device for washing and sorting raw coal, which comprises a shell 1, a feed frame 2 opened at the top end of the shell 1, a crushing roller 6 rotatably connected inside the shell 1, a filter screen 7 arranged inside the shell 1, a conveying belt 3 arranged on one side of the shell 1, and a screening assembly 13 rotatably connected inside the shell 1, the screening assembly 13 comprising screen plates 131 rotatably connected on both sides of the filter screen 7, the screen plates 131 being inclined, the shell 1 further comprising a crushing structure 8 rotatably connected inside the shell 1, the crushing structure 8 comprising a reciprocating moving part rotatably connected inside the shell 1, one side of the reciprocating moving part being provided with an arc plate 88, the inside of the shell 1 being provided with a guide plate 11 corresponding to the arc plate 88, the arc plate 88 being in contact with the guide plate 11 to crush the coal blocks, the inside of the shell 1 further comprising a secondary crushing and sorting structure 9 slidably connected, the secondary crushing and sorting structure 9 comprising a first sub-plate 98 and a second sub-plate 99 slidably connected inside the shell 1, the first sub-plate 98 and the second sub-plate 99 sliding up and down, the surface of the first sub-plate 98 being provided with holes, the diameter of the holes of the first sub-plate 98 being larger than the diameter of the holes of the second sub-plate 99, the first sub-plate 98 being in contact with the bottom end of the arc plate 88 to crush the coal blocks, and the coal blocks being crushed in multiple stages by the crushing structure 8 and the secondary crushing and sorting structure 9.

[0026] Reference Figs. 1-6 As shown in the figure, in the present embodiment: one side of the shell 1 is fixedly provided with a servo motor 4, the output end of the servo motor 4 extends to the inside of the shell 1, the output end of the servo motor 4 is provided with a gear set 5, the gear set 5 is reversely meshed and connected, and the gear set 5 is connected with the crushing roller 6.

[0027] The screening assembly 13 comprises a groove opened in the inner wall of the shell 1, the inside of the groove is provided with an electric push rod 134, the output end of the electric push rod 134 is provided with a rack 135, the rack 135 is in sliding connection with the inner wall of the shell 1, both sides of the sieve plate 131 are provided with a rotating rod 132, the outer side of the rotating rod 132 is provided with a driven wheel 133, the driven wheel 133 is in meshing connection with the rack 135, the surface of the shell 1 is provided with an opening 12, the inside of the opening 12 is rotatably connected with a baffle, this process realizes the preliminary classification screening of the coal blocks through the W-shaped structure, avoids that the large coal blocks that do not meet the standard directly enter the subsequent links, and realizes the circulating crushing of the large coal blocks in cooperation with the automatically driven sieve plate 131, so that the particle size of the primary crushed coal blocks is more uniform, and the subsequent crushing pressure is reduced.

[0028] The inside of the shell 1 is rotatably connected with a rotating column 81, the rotating column 81 is sleeved with a belt 10 at the output surface of a servo motor 4, one side of the rotating column 81 is provided with a rotating disc 82, the surface of the rotating disc 82 is provided with a protruding block 83, the inside of the shell 1 is provided with a frame plate 86, the inside of the frame plate 86 is slidably connected with a push plate 85, one end of the push plate 85 is provided with a hollow plate 84, the protruding block 83 is in sliding connection with the hollow plate 84, the other end of the push plate 85 is provided with a connecting block 87, the connecting block 87 is connected with an arc plate 88, the top surface of the arc plate 88 is arc-shaped, the side surface of the arc plate 88 is beveled, the bottom end of the arc plate 88 is provided with a plurality of nail blocks 89 distributed at equal intervals, so that the arc plate 88 reciprocatingly moves to extrude and crush the fallen coal blocks, so that the effect of multiple crushing is achieved.

[0029] The outside of the rotating column 81 is further provided with a half gear 91, the inside of the shell 1 is slidably connected with a side block 93, one side of the side block 93 is provided with a gear ring 92, the gear ring 92 is in meshing connection with the half gear 91, the bottom end of the gear ring 92 is provided with a bottom plate 94, one side of the bottom plate 94 is provided with a fixed plate 95, the fixed plate 95 is connected with a first dividing plate 98 and a second dividing plate 99, the inner wall of the shell 1 is provided with a sliding groove, the inside of the sliding groove is slidably connected with a sliding block 96, the bottom end of the sliding block 96 is provided with a spring 97, the spring 97 is connected with the sliding groove, the up-and-down reciprocating movement of the first dividing plate 98 and the second dividing plate 99 realizes the classification screening of the coal blocks, the holes with different diameters meet the different particle size requirements, and the movement process is in contact with the nail blocks 89 to realize the secondary crushing, and the particle size of the coal blocks is further refined.

[0030] Working principle: the user through the coal by the input frame 2 into the shell 1 inside the multi-stage crushing work, by starting the shell 1 outside fixed installation of servo motor 4 drive, servo motor 4 output end extends to the shell 1 inside and drive gear set 5 meshing rotation, gear set 5 drive one side of the broken roll 6 rotation, broken roll 6 to the input through the feed frame 2 coal will be preliminary broken, coal through two groups of reverse rotation of the wolf tooth broken roll 6 broken after falling into the surface of the filter screen 7, coal through the filter screen 7 inclined surface roll to both sides, because the filter screen 7 both sides are rotatably connected with sieve plate 131, so that the filter screen 7 and sieve assembly 13 is W-shaped, coal in the filter screen 7 surface roll, small coal through the filter hole falls down, however, the large coal roll to the inner side of the sieve plate 131, so when two groups of sieve plate 131 inside stack more large coal, by starting the shell 1 inner wall opening groove inside fixed electric push rod 134 drive, electric push rod 134 drive the output end of the rack 135 movement, rack 135 and shell 1 inner wall sliding connection, rack 135 and driven wheel 133 meshing connection, driven wheel 133 drive the rotation of the connecting rod 132, so that the connecting rod 132 drive sieve plate 131 rotation, so that the sieve plate 131 and shell 1 surface opening 12 corresponding, therefore the opening 12 hinged baffle open, so that the coal through the inclined surface of the sieve plate 131 roll, coal through the opening 12 discharge after re-entering the shell 1 inside through the feed frame 2 for crushing again, this process through the W-shaped structure to realize the preliminary classification of coal, to avoid non-compliance of large coal directly into the subsequent link, at the same time with the automatic drive sieve plate 131 to realize the cycle crushing of large coal, ensure the primary broken coal particle size more uniform, reduce the subsequent crushing pressure; The coal block falling through the filter holes on the surface of the filter screen 7 falls on the top surface of the arc plate 88. Since the top surface of the arc plate 88 is arc-shaped, the coal block falling on the surface of the arc plate 88 slides from both sides to the surface of the partition plate one 98. Since the output end surface of the servo motor 4 is sleeved with the belt 10, the rotating column 81 is driven to rotate through the belt 10 while the crushing roller 6 is driven to crush by the servo motor 4. The rotating column 81 drives the rotating disc 82 on one side to rotate, and the rotating disc 82 drives the protruding block 83 on the surface to rotate, so that the protruding block 83 is in sliding connection with the hollow plate 84, and the hollow plate 84 drives the push plate 85 on one side to reciprocate. The push plate 85 is in sliding connection with the frame plate 86 on the outside, the frame plate 86 is connected with the inner wall of the shell 1, and the push plate 85 drives the connecting block 87 on one side to reciprocate. Since the connecting block 87 is connected with the arc plate 88, the connecting block 87 drives the arc plate 88 to reciprocate. The side surface of the arc plate 88 is inclined, and two groups of guide plates 11 are symmetrically arranged in the interior of the shell 1 corresponding to the inclined surface of the arc plate 88, so that the arc plate 88 reciprocates to crush the falling coal block, thereby achieving the effect of multiple crushing. The same servo motor 4 is used to drive multiple components to link, saving the cost of power source, and the reciprocating movement of the arc plate 88 cooperates with the guide plates 11 to form a crushing space, so that the coal block crushed in the primary crushing is refined again, improving the crushing efficiency. Meanwhile, the rotating column 81 drives the half gear 91 on the outside to rotate, the half gear 91 is in meshing connection with the gear ring 92 on the outside, and the rotating column 81 drives the half gear 91 to rotate one circle, so that the gear ring 92 reciprocates once. The gear ring 92 is in sliding connection with the inner wall of the shell 1 through the side block 93 on one side, the gear ring 92 drives the bottom plate 94 at the bottom end to reciprocate, and the bottom plate 94 drives the fixed plate 95 on one side to reciprocate up and down. Since the fixed plate 95 is connected with the partition plate one 98 and the partition plate two 99, the fixed plate 95 drives the partition plate one 98 and the partition plate two 99 to reciprocate up and down. Since the surfaces of the partition plate one 98 and the partition plate two 99 are both provided with a plurality of holes, the hole diameter of the partition plate one 98 is larger than that of the partition plate two 99. The fixed plate 95 drives the sliding block 96 on one side to be in sliding connection with the sliding groove provided in the inner wall of the shell 1, the sliding block 96 drives the spring 97 on one side to stretch and contract, and the partition plate one 98 and the partition plate two 99 reciprocate up and down, which has a screening effect. Meanwhile, the coal block on the surface of the partition plate one 98 contacts the nail block 89 at the bottom end of the arc plate 88, which reciprocates up and down, so that the crushing structure 8 crushes the coal, and the nail block 89 also has the effect of dredging the holes of the partition plate one 98. The coal is classified and screened through the reciprocating movement of the partition plate one 98 and the partition plate two 99, different hole diameters meet different particle size requirements, and the coal is crushed again during the movement process and contacts the nail block 89, which further refines the particle size of the coal. Meanwhile, the dredging effect of the nail block 89 on the holes avoids blockage during the screening process, ensures the continuous and stable operation of the equipment, and finally the coal falling through the holes of the partition plate two 99 falls on the surface of the lower conveying belt 3 for discharge.

[0031] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should all belong to the protection scope of the present application.

Claims

1. A multi-stage crushing device for washing raw coal, characterized by, The utility model provides a coal crushing and screening device, including shell (1), the feed frame (2) of opening in shell (1) top, the crushing roller (6) of rotation connection in the inside of shell (1), the filter screen (7) of setting in the inside of shell (1), the transmission belt (3) of setting in one side of shell (1) and the screening assembly (13) of rotation connection in the inside of shell (1), screening assembly (13) includes the sieve plate (131) of rotation connection in the both sides of filter screen (7), sieve plate (131) is inclined, the inside of shell (1) is also rotationally connected with the pressure crush structure (8), pressure crush structure (8) includes reciprocating movement part of rotation connection in the inside of shell (1), one side of reciprocating movement part is provided with arc plate (88), the inside of shell (1) is provided with guide plate (11) corresponding arc plate (88), and reciprocating movement arc plate (88) is contacted with guide plate (11) and extrudes and crushes coal block, the inside of shell (1) is also slidably connected with the complex crushing and screening structure (9), and complex crushing and screening structure (9) includes the division board one (98) and the division board two (99) of sliding connection in the inside of shell (1), and the division board one (98) and the division board two (99) slide up and down, the surface of division board one (98) is provided with hole, and the hole diameter of division board one (98) is greater than the hole diameter of division board two (99), and the bottom of division board one (98) is contacted with arc plate (88) and extrudes and crushes coal block, and coal block is crushed in multiple stages through pressure crush structure (8) and complex crushing and screening structure (9).

2. The multi-stage crushing device for washing raw coal according to claim 1, characterized in that: The side of shell (1) is fixedly installed with a servo motor (4), the output end of servo motor (4) extends to the inside of shell (1), the output end of servo motor (4) is provided with a gear set (5), the gear set (5) is reversely engaged, and the gear set (5) is connected with the crushing roller (6).

3. The multi-stage crushing device for washing raw coal according to claim 1, characterized in that: The screening assembly (13) includes a groove formed in the inner wall of the shell (1), an electric push rod (134) is arranged in the groove, the output end of the electric push rod (134) is provided with a rack (135), and the rack (135) is slidably connected with the inner wall of the shell (1).

4. The multi-stage crushing device for washing raw coal according to claim 3, characterized in that: The both sides of the sieve plate (131) are provided with rotating rods (132), the outer side of the rotating rod (132) is provided with a driven wheel (133), the driven wheel (133) is engaged with the rack (135), and the surface of the shell (1) is provided with an opening (12), the inside of the opening (12) is rotatably connected with a baffle.

5. The multi-stage crushing device for washing raw coal according to claim 1, characterized in that: The inside of the shell (1) is rotatably connected with a rotating column (81), the rotating column (81) is sleeved with a belt (10) on the output surface of the servo motor (4), one side of the rotating column (81) is provided with a rotating disc (82), and the surface of the rotating disc (82) is provided with a protruding block (83).

6. The multi-stage crushing device for washing and sorting raw coal according to claim 6, characterized in that: The inside of the shell (1) is provided with a frame plate (86), the inside of the frame plate (86) is slidably connected with a push plate (85), one end of the push plate (85) is provided with a hollow plate (84), and the protruding block (83) is slidably connected with the hollow plate (84).

7. The multi-stage crushing device for washing and sorting raw coal according to claim 6, characterized in that: The other end of the push plate (85) is provided with a connecting block (87), the connecting block (87) is connected with an arc plate (88), the top surface of the arc plate (88) is arc-shaped, the side surface of the arc plate (88) is inclined, and the bottom end of the arc plate (88) is provided with a nail block (89), and the nail block (89) is distributed at equal intervals.

8. The multi-stage crushing device for washing raw coal according to claim 1, characterized in that: The outer side of the rotating column (81) is further provided with a half gear (91), the inside of the shell (1) is slidably connected with a side block (93), one side of the side block (93) is provided with a gear ring (92), and the gear ring (92) is meshed and connected with the half gear (91).

9. The multi-stage crushing device for washing raw coal according to claim 8, characterized in that: The bottom end of the gear ring (92) is provided with a bottom plate (94), one side of the bottom plate (94) is provided with a fixed plate (95), and the fixed plate (95) is connected with a first partition plate (98) and a second partition plate (99).

10. The multi-stage crushing device for washing and sorting raw coal according to claim 9, characterized in that: The inner wall of the shell (1) is provided with a sliding groove, the inside of the sliding groove is slidably connected with a sliding block (96), and the bottom end of the sliding block (96) is provided with a spring (97), and the spring (97) is connected with the sliding groove.

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