Coal dressing device for slack coal processing

Abstract

The invention discloses a coal dressing device for slack coal processing, and belongs to the technical field of coal dressing devices.The coal dressing device comprises a bottom block and a bucket-shaped screen drum, the bucket-shaped screen drum is arranged on the bottom block, and a plurality of first filter residue holes and first slack coal filter holes are formed in the bucket-shaped screen drum; the plurality of first filter residue holes are formed in the relatively narrow surface part of the hopper-shaped screen drum, and the plurality of first slack coal filter holes are formed in the relatively wide surface part of the hopper-shaped screen drum; according to the device, the eccentric pressing block on the connecting rod is driven to rotate through the rotating ring block under the maneuvering rotation of the inner screen drum, the eccentric pressing block drives large-size coal briquettes at the eccentric pressing block to be ground and crushed by the eccentric pressing drum through the pressing and sliding rotation in the eccentric pressing drum, and the large-size coal briquettes can finally pass through the first slack coal filtering hole to be screened out to take out slack coal. And the screening and crushing effects of a unified machine body on the coal are achieved, and therefore the coal screening and processing efficiency can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal preparation devices, and in particular relates to a coal preparation device for processing fine coal. Background Art

[0002] Fine coal is the finest coal produced in the mines in terms of coal chemistry and coal quality analysis. It often contains stone flakes and gangue. Unless it is removed, the fuel will not meet the requirements. Its particle size is 0mm-13mm. It is generally used as a combustion aid in steel plants.

[0003] Existing coal is often screened through filters with different apertures. After the coal is screened into fine coal, it is found that the quantity is insufficient. Sometimes some of the coal needs to be crushed and then screened into fine coal again. The process from crushing to screening of materials is relatively cumbersome, which reduces the efficiency of fine coal screening processing.

[0004] In order to avoid the above technical problems, it is necessary to provide a coal preparation device for fine coal processing to overcome the above defects in the prior art. Summary of the invention

[0005] The object of the present invention is to provide a coal preparation device for fine coal processing to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a coal selection device for fine coal processing, comprising a bottom block and a bucket-shaped screen drum, wherein the bucket-shaped screen drum is arranged on the bottom block, and a plurality of first filter residue holes and first fine coal filter holes are respectively opened on the bucket-shaped screen drum, wherein the plurality of first filter residue holes are all located on a relatively narrow surface portion of the bucket-shaped screen drum, and the plurality of first fine coal filter holes are all located on a relatively wide surface portion of the bucket-shaped screen drum, a rotating ring block is rotatably arranged on one side of the bucket-shaped screen drum, a plurality of multi-stage electric push rods are fixedly arranged on one side of the rotating ring block, one end of the plurality of multi-stage electric push rods is commonly fixedly connected to a ring gear block, and the inner portion of the ring gear block An inner sieve cylinder is fixedly connected, one end of the inner sieve cylinder is connected to a head sieve frame, a plurality of second filter residue holes are provided on the inner sieve cylinder and the head sieve frame, the head sieve frame is located in the bucket-shaped sieve cylinder, and the head sieve frame is adapted to the cross-sectional size of the bucket-shaped sieve cylinder, the limit position of the head sieve frame is located at the boundary between the first filter residue hole and the first final coal filter hole on the bucket-shaped sieve cylinder, a plurality of second final coal filter holes are provided on one side of the head sieve frame, two connecting rods are fixedly connected in the rotating ring block, one end of the two connecting rods are fixedly connected with an eccentric pressure block, an eccentric pressure cylinder is provided on the outside of the inner sieve cylinder, and a driving mechanism is provided on the bottom block.

[0007] As a preferred embodiment, each of the eccentric pressure blocks is located in an eccentric pressure cylinder, a limiting ring block is arranged inside the eccentric pressure cylinder, the limiting ring block is located on one side of the eccentric pressure block, and a plurality of guide blocks are arranged on the inner wall of the head screen frame.

[0008] As a preferred embodiment, the driving mechanism includes a first slip ring block, which is fixedly arranged on the bucket-shaped screen drum, and two side sliders are circularly slidably arranged on the first slip ring block, and two synchronous electric push rods are fixedly arranged on one side of the two side sliders, and a fixed block is commonly fixedly arranged at one end of the two synchronous electric push rods.

[0009] As a preferred implementation, a first motor is fixedly provided on one side of the fixed block, a first gear is fixedly provided on an output shaft of the first motor, and the first gear is meshed with the ring gear block.

[0010] As a preferred embodiment, two columns are fixedly provided on the bottom block, and the far sides of the two side sliders are respectively rotated and provided on the proximal sides of the two columns. An arc cylinder is fixedly provided on the bottom block via a first connecting block, and a second connecting block is fixedly provided on the top end of the arc cylinder.

[0011] As a preferred implementation scheme, a second slip ring block is fixedly provided on the bucket-shaped screen drum, a bottom sliding block is circularly slidably provided on the second slip ring block, and the bottom of the bottom sliding block is connected to the second connecting block.

[0012] As a preferred embodiment, a second motor is fixedly provided on the second connecting block, a second gear is fixedly provided on the output shaft of the second motor, a crown gear ring is provided on one side of the second slip ring block, the second gear and the crown gear ring are meshed with each other, and the first slip ring block and the second slip ring block are both located at the two end positions on the bucket-shaped screen drum.

[0013] As a preferred embodiment, the adjacent sides of the two columns are jointly fixed with inclined discharge plates through connecting blocks, and the inclined discharge plates are located at the position of the first final coal filter hole on the bucket-shaped screen drum. A residue storage frame is fixedly provided on the bottom block.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention provides a bucket-shaped screen drum. When coal is put into the narrow opening on one side of the bucket-shaped screen drum, the slope formed by the bucket-shaped inner wall of the bucket-shaped screen drum and the motorized rotation of the bucket-shaped screen drum make the coal gradually roll toward one side of the head screen frame in the bucket-shaped screen drum. During this period, fine powder residue in the coal will fall through the first filter residue hole with a smaller diameter, and coal blocks that meet the size of the final coal will be screened into the head screen frame when they contact the second final coal filter hole on the side of the head screen frame, thereby realizing the screening of the final coal of the appropriate size, while the larger coal blocks will be left in the first filter residue hole on the side of the head screen frame. At this time, the ring gear block will be driven by the extension and retraction of the multi-stage electric push rod. The inner screen drum and the head screen frame are telescopically moved toward the wide-diameter side of the bucket-shaped screen drum, so that large-sized coal blocks will continue to roll down the downslope of the inner wall of the bucket-shaped screen drum through the gap between the head screen frame and the inner screen drum, and finally fall into the eccentric pressing cylinder. At this time, the motorized rotation of the inner screen drum will drive the eccentric pressing block on the connecting rod to rotate through the rotating ring block. The eccentric pressing block will drive the large-sized coal blocks here to be crushed by the eccentric pressing cylinder through the pressure and sliding in the eccentric pressing cylinder, and can finally be sieved out of the first fine coal filter hole to remove the fine coal. In summary, the unified screening and crushing effect of the coal material is achieved, which helps to improve the efficiency of coal screening and processing.

[0016] The present invention, by arranging the first filter residue hole and the first final coal filter hole on the bucket-shaped screen cylinder, can realize screening of small particles of coal at the first filter residue hole, and can realize screening of final coal at the first final coal filter hole at the same time, so that large-sized coal blocks can be specifically crushed at the eccentric pressing cylinder, which not only realizes multiple screening of coal blocks, but also realizes the targeted and accurate crushing of large-sized coal blocks, which helps to improve the quality of coal block crushing and processing.

[0017] The present invention, by arranging an arc cylinder, can drive the bucket-shaped screen drum to rotate at a certain angle through the second connecting block, the bottom sliding block and the second sliding ring block under the operation of the arc cylinder, thereby the inclination angle of the side wall of the bucket-shaped screen drum can be changed, so that the rolling screening speed of the coal in the bucket-shaped screen drum with different slopes during screening can be conveniently changed according to needs, thereby helping to achieve the adjustment of the coal screening effect.

[0018] The present invention, by setting a first motor and a second motor, will drive the annular gear block to rotate through the first gear when the first motor is working, and the annular gear block will drive the rotating annular block to rotate on one side of the bucket-type screen drum through the multi-stage electric push rod, and at the same time, the annular gear block will also drive the inner screen drum and the head screen frame to rotate, and will drive the second gear to rotate when the second motor is working, and the second gear will drive the second sliding ring block to slide in the bottom slider through the crown gear ring, and the second sliding ring block will drive the bucket-type screen drum to rotate, and the first sliding ring block on one side of the bucket-type screen drum will slide adaptively in the two side sliders, and when the multi-stage electric push rod is extended and retracted, the synchronous electric push rod will also be extended and retracted synchronously, so as to meet the synchronous meshing of the first gear and the annular gear block, so that the bucket-type screen drum and the head screen frame can be rotated, so that the coal material in the bucket-type screen drum and the head screen frame is screened due to the rotation of the bucket-type screen drum and the head screen frame and the nested multi-layer screening between the bucket-type screen drum and the head screen frame, which helps to improve the balance and effectiveness of coal material screening and ensure the screening effect of coal material.

[0019] The present invention provides an inclined discharge plate. When coal blocks that meet the size of fine coal among the coal blocks crushed by the eccentric pressing cylinder in the bucket-shaped screen cylinder are screened out from the first fine coal filter hole, the screened coal blocks will fall on the inclined discharge plate. The inclined discharge plate will guide the screened fine coal to be discharged in the same direction as the discharge port on one side of the inner screen cylinder. The crushed coal powder slag that falls from the first fine coal filter hole will be screened out by the sieve holes on the inclined discharge plate and fall into the residue storage frame, thereby realizing the synchronous processing of the crushing and screening of large-sized coal blocks and the same-direction collection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a schematic diagram of a local three-dimensional structure of the present invention;

[0022] Figure 3 It is a schematic diagram of a cross-sectional three-dimensional structure of a bucket-shaped screen drum of the present invention;

[0023] Figure 4 It is a schematic diagram of a partially cutaway three-dimensional structure of a bucket-shaped screen drum of the present invention;

[0024] Figure 5 For the present invention Figure 3 A is a schematic diagram of the magnified three-dimensional structure;

[0025] Figure 6 It is a schematic diagram of a partial three-dimensional structure of the bucket-shaped screen drum of the present invention;

[0026] Figure 7 It is a schematic diagram of a side-view stereoscopic structure of the present invention;

[0027] Figure 8It is a schematic diagram of a partial three-dimensional structure from a side view of the present invention;

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the inner screen drum of the present invention;

[0029] Fig.10 It is a schematic diagram of the three-dimensional structure of the eccentric pressing block of the present invention;

[0030] Fig.11 It is a schematic diagram of a top view of a three-dimensional structure of the present invention.

[0031] In the figure: 1, bottom block; 2, bucket-shaped screen cylinder; 3, first filter residue hole; 4, first final coal filter hole; 5, rotating ring block; 6, multi-stage electric push rod; 7, ring gear block; 8, inner screen cylinder; 9, head screen frame; 10, second filter residue hole; 11, second final coal filter hole; 12, connecting rod; 13, eccentric pressure block; 14, eccentric pressure cylinder; 15, driving mechanism; 151, first sliding ring block; 152, side slider; 153, synchronous electric push rod; 154 , fixed block; 155, first motor; 156, first gear; 157, column; 158, first connecting block; 159, arc cylinder; 1510, second connecting block; 1511, second slip ring block; 1512, bottom slider; 1513, second motor; 1514, second gear; 1515, crown gear ring; 16, limiting ring block; 17, guide block; 18, connecting block; 19, oblique discharge plate; 20, residue storage frame. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the embodiments.

[0033] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0034] See also Figure 1-11The present invention provides a coal selection device for fine coal processing, comprising a bottom block 1 and a bucket-shaped screen drum 2, the bucket-shaped screen drum 2 is arranged on the bottom block 1, and a plurality of first filter residue holes 3 and first fine coal filter holes 4 are respectively opened on the bucket-shaped screen drum 2, the plurality of first filter residue holes 3 are all located at a relatively narrow surface portion of the bucket-shaped screen drum 2, and the plurality of first fine coal filter holes 4 are all located at a relatively wide surface portion of the bucket-shaped screen drum 2, a rotating ring block 5 is rotatably arranged on one side of the bucket-shaped screen drum 2, a plurality of multi-stage electric push rods 6 are fixedly arranged on one side of the rotating ring block 5, one end of the plurality of multi-stage electric push rods 6 are commonly fixedly connected to a ring gear block 7, the interior of the ring gear block 7 is fixedly connected to an inner screen drum 8, and one end of the inner screen drum 8 is connected to a rotating ring block 5. A head screen frame 9 is provided, and a plurality of second filter residue holes 10 are provided on the inner screen cylinder 8 and the head screen frame 9. The head screen frame 9 is located in the bucket-shaped screen cylinder 2, and the head screen frame 9 is adapted to the cross-sectional size thereof in the bucket-shaped screen cylinder 2. The limit position of the head screen frame 9 is located at the boundary between the first filter residue hole 3 and the first final coal filter hole 4 on the bucket-shaped screen cylinder 2. A plurality of second final coal filter holes 11 are provided on one side of the head screen frame 9. Two connecting rods 12 are fixedly connected in the rotating ring block 5, and one end of the two connecting rods 12 is fixedly connected with an eccentric pressure block 13. An eccentric pressure cylinder 14 is provided on the outside of the inner screen cylinder 8, and a driving mechanism 15 is provided on the bottom block 1. By providing the bucket-shaped screen cylinder 2, when the coal material passes through the bucket-shaped screen cylinder 2, the eccentric pressure cylinder 14 is provided on the bottom block 1. When the narrow opening on one side of the screen drum 2 is put in, due to the slope formed by the bucket-shaped inner wall of the bucket-shaped screen drum 2, combined with the motorized rotation of the bucket-shaped screen drum 2, the coal material will gradually roll to the side of the head screen frame 9 in the bucket-shaped screen drum 2. During this period, the fine powder residue in the coal material will be screened through the first filter residue hole 3 with a smaller diameter, and the coal blocks that meet the size of the fine coal will be screened into the head screen frame 9 when they come into contact with the second fine coal filter hole 11 on the side of the head screen frame 9, thereby realizing the screening of the fine coal of the appropriate size, while the larger coal blocks will be left in the first filter residue hole 3 on the side of the head screen frame 9. At this time, under the extension and retraction of the multi-stage electric push rod 6, the inner screen drum 8 and the head screen frame 9 will be driven to the bucket-shaped screen drum 2 through the ring gear block 7. The wide-diameter telescopic movement of one side of the screen drum 2 allows large-sized coal blocks to continue to roll down the inner wall of the bucket-shaped screen drum 2 for screening through the gap between the head screen frame 9 and the inner wall of the inner screen drum 8, and finally fall into the eccentric pressing cylinder 14. At this time, the eccentric pressing block 13 on the connecting rod 12 is driven to rotate through the rotating ring block 5 under the motorized rotation of the inner screen drum 8. The eccentric pressing block 13 drives the large-sized coal blocks here to be crushed by the eccentric pressing cylinder 14 through the pressure sliding in the eccentric pressing cylinder 14, and can finally be sieved out of the first fine coal filter hole 4. In summary, the unified screening and crushing effect of the coal material is achieved, which helps to improve the efficiency of coal material screening and processing.

[0035] like Figure 3 and Figure 5As shown, the present invention provides an embodiment, each eccentric pressure block 13 is located in an eccentric pressure cylinder 14, a limiting ring block 16 is arranged inside the eccentric pressure cylinder 14, the limiting ring block 16 is located on one side of the eccentric pressure block 13, and a plurality of guide blocks 17 are arranged on the inner wall of the head screen frame 9.

[0036] By setting the guide blocks 17, when the head screen frame 9 is driven to rotate, the guide blocks 17 in the head screen frame 9 will also rotate. The multiple guide blocks 17 can guide the coal in the head screen frame 9 to be transported to the inner screen tube 8 through rotation, which helps to prevent the accumulation of coal in the head screen frame 9.

[0037] like Figure 2 As shown, the present invention provides an embodiment, the driving mechanism 15 includes a first slip ring block 151, the first slip ring block 151 is fixedly set on the bucket-shaped screen drum 2, two side sliders 152 are circularly slidably set on the first slip ring block 151, two synchronous electric push rods 153 are fixedly set on one side of the two side sliders 152, and a fixed block 154 is fixedly set at one end of the two synchronous electric push rods 153.

[0038] like Figure 2 As shown, the present invention provides an embodiment, a first motor 155 is fixedly provided on one side of the fixed block 154, a first gear 156 is fixedly provided on the output shaft of the first motor 155, and the first gear 156 is meshed with the ring gear block 7.

[0039] like Figure 6 As shown, the present invention provides an embodiment, two columns 157 are fixedly provided on the bottom block 1, and the far sides of the two side sliders 152 are respectively rotated and provided on the proximal sides of the two columns 157, and an arc cylinder 159 is fixedly provided on the bottom block 1 through a first connecting block 158, and a second connecting block 1510 is fixedly provided on the top of the arc cylinder 159.

[0040] like Figure 7 As shown, the present invention provides an embodiment, a second slip ring block 1511 is fixedly provided on the bucket-shaped screen drum 2, a bottom sliding block 1512 is circularly slidably provided on the second slip ring block 1511, and the bottom of the bottom sliding block 1512 is connected to the second connecting block 1510.

[0041] like Figure 7As shown, the present invention provides an embodiment, a second motor 1513 is fixedly provided on the second connecting block 1510, a second gear 1514 is fixedly provided on the output shaft of the second motor 1513, a crown gear ring 1515 is provided on one side of the second slip ring block 1511, the second gear 1514 and the crown gear ring 1515 are meshed with each other, the first slip ring block 151 and the second slip ring block 1511 are both located at the two end parts of the bucket-shaped screen drum 2, and the arc cylinder 159 is provided, and the arc cylinder 159 can be operated through the second connecting block The block 1510, the bottom slider 1512 and the second sliding ring block 1511 drive the bucket-shaped screen drum 2 to rotate at a certain angle, thereby changing the inclination angle of the side wall of the bucket-shaped screen drum 2, so that the rolling and screening speed of the coal in the bucket-shaped screen drum 2 with different slopes during screening can be conveniently changed according to needs, thereby helping to adjust the screening effect of the coal, and by setting the first motor 155 and the second motor 1513, the ring gear block 7 will be driven to rotate through the first gear 156 under the operation of the first motor 155, and the ring gear block 7 will be driven to rotate. The block 7 will drive the rotating ring block 5 to rotate on one side of the bucket-shaped screen drum 2 through the multi-stage electric push rod 6. At the same time, the ring gear block 7 will also drive the inner screen drum 8 and the head screen frame 9 to rotate. Under the operation of the second motor 1513, the second gear 1514 will be driven to rotate. The second gear 1514 will drive the second slip ring block 1511 to slide in the bottom slider 1512 through the crown gear ring 1515. The second slip ring block 1511 drives the bucket-shaped screen drum 2 to rotate. The first slip ring block 151 on one side of the bucket-shaped screen drum 2 will slide in the two side sliders 152. Adaptive sliding is performed. When the multi-stage electric push rod 6 is extended or retracted, the synchronous electric push rod 153 will also be extended or retracted synchronously to satisfy the synchronous meshing of the first gear 156 and the ring gear block 7, so that the bucket-shaped screen drum 2 and the head screen frame 9 can be rotated, so that the coal in the bucket-shaped screen drum 2 and the head screen frame 9 is screened by the rotation of the bucket-shaped screen drum 2 and the head screen frame 9 and the nested multi-layer screening between the bucket-shaped screen drum 2 and the head screen frame 9, which helps to improve the balance and effectiveness of the coal screening and ensure the screening effect of the coal.

[0042] like Figure 7As shown, the present invention provides an embodiment, the adjacent sides of the two uprights 157 are jointly fixed with an inclined discharge plate 19 through a connecting block 18, the inclined discharge plate 19 is located at the position of the first final coal filter hole 4 on the bucket-shaped screen drum 2, and a residue storage frame 20 is fixedly provided on the bottom block 1. By providing the inclined discharge plate 19, when the coal blocks that meet the final coal size among the coal blocks crushed by the eccentric pressing cylinder 14 in the bucket-shaped screen drum 2 are screened out from the first final coal filter hole 4, the screened coal blocks will fall on the inclined discharge plate 19, and the inclined discharge plate 19 will guide the screened final coal to be discharged in the same direction as the discharge port on one side of the inner screen drum 8, and the crushed coal powder slag that is screened out from the first final coal filter hole 4 will be screened into the residue storage frame 20 by the screen holes on the inclined discharge plate 19 when it falls on the inclined discharge plate 19, thereby realizing the synchronous processing and same-direction collection effect of the crushing and screening of large-sized coal blocks.

[0043] The working principle and use process of the present invention are as follows: by setting a bucket-shaped screen drum 2, when coal is put into the narrow opening on one side of the bucket-shaped screen drum 2, due to the slope formed by the bucket-shaped inner wall of the bucket-shaped screen drum 2, combined with the motorized rotation of the bucket-shaped screen drum 2, the coal will gradually roll to the side of the head screen frame 9 in the bucket-shaped screen drum 2. During this period, the fine powder residue in the coal will be screened through the first filter residue hole 3 with a smaller diameter, and the coal blocks that meet the size of the fine coal will be screened into the head screen frame 9 when they contact the second fine coal filter hole 11 on the side of the head screen frame 9. Moreover, due to the motorized rotation of the inner screen drum 8 and the head screen frame 9 and the oblique setting of the inner screen drum 8 and the head screen frame 9, the screened fine coal blocks will pass through the head screen frame 9 and the inner screen drum 8 and finally enter from a side opening of the bucket-shaped screen drum 2. The fine coal falls, thereby realizing the screening of the fine coal of suitable size, while the larger coal pieces will be left in the bucket-shaped screen drum 2 on one side of the head screen frame 9. At this time, under the extension and contraction of the multi-stage electric push rod 6, the ring tooth block 7 will drive the inner screen drum 8 and the head screen frame 9 to move toward the wide-diameter extension and contraction of the bucket-shaped screen drum 2, so that the head screen frame 9 will not be restricted to the corresponding cross-sectional size position in the bucket-shaped screen drum 2. In this way, the large-sized coal pieces left after screening on one side of the head screen frame 9 will pass through the head screen frame 9. After the movement of the head screen frame 9, the coal pieces will continue to roll down the downslope of the inner wall of the bucket-shaped screen drum 2 through the gap between the head screen frame 9 and the inner wall of the bucket-shaped screen drum 2 for screening. During this period, the first fine coal filter hole 4 on the bucket-shaped screen drum 2 will once again screen the rolled coal pieces, and the large-sized coal pieces will eventually When the coal falls to the eccentric pressing cylinder 14, the inner screen cylinder 8 will rotate with the eccentric pressing block 13 on the connecting rod 12 through the rotating ring block 5. The eccentric pressing block 13 will drive the eccentric pressing cylinder 14 to perform annular eccentric rolling rotation in the bucket-shaped screen cylinder 2 through the pressing and sliding in the eccentric pressing cylinder 14. The large-sized coal blocks that fall here can be crushed and crushed by the eccentric pressing cylinder 14, and can finally be sieved out of the first final coal filter hole 4. In summary, the unified screening and crushing effect of the coal material is achieved, which helps to improve the efficiency of the coal screening process. In addition, the first filter residue hole 3 and the first final coal filter hole 4 are set on the bucket-shaped screen cylinder 2, so that the coal material can be screened for small particles at the first filter residue hole 3, and at the same time, the first final coal filter hole 4 can realize the screening of fine coal, so that large-sized coal blocks can be crushed in a targeted manner at the eccentric pressing cylinder 14, which not only realizes multiple screening of coal blocks, but also realizes the targeted and accurate crushing of large-sized coal blocks, which is helpful to improve the quality of coal block crushing and processing; by setting the arc cylinder 159, the bucket-shaped screen drum 2 can be driven to rotate at a certain angle through the second connecting block 1510, the bottom sliding block 1512 and the second sliding ring block 1511 under the operation of the arc cylinder 159, and the inclination angle of the side wall of the bucket-shaped screen drum 2 can be changed thereby, so that the rolling screening speed of the coal in the bucket-shaped screen drum 2 with different slopes during screening can be conveniently changed according to needs, which is helpful to realize the adjustment of the coal screening effect;By setting the first motor 155 and the second motor 1513, the first motor 155 will drive the ring gear block 7 to rotate through the first gear 156 under the operation of the first motor 155, and the ring gear block 7 will drive the rotating ring block 5 to rotate on one side of the bucket-type screen drum 2 through the multi-stage electric push rod 6. At the same time, the ring gear block 7 will also drive the inner screen drum 8 and the head screen frame 9 to rotate. Under the operation of the second motor 1513, the second gear 1514 will be driven to rotate. The second gear 1514 will drive the second slip ring block 1511 to slide in the bottom slider 1512 through the crown gear ring 1515. The second slip ring block 1511 drives the bucket-type screen drum 2 to rotate, and the first slip ring block 151 on one side of the bucket-type screen drum 2 will slide adaptively in the two side sliders 152. When the multi-stage electric push rod 6 is extended or retracted, the synchronous electric push rod 153 will also be extended or retracted synchronously, so as to meet the synchronous meshing of the first gear 156 and the ring gear block 7, thereby making the bucket-type screen drum 2 and the head screen frame 9 can be rotated, so that the coal is screened in the bucket-shaped screen drum 2 and the head screen frame 9 due to the rotation of the bucket-shaped screen drum 2 and the head screen frame 9 and the nested multi-layer screening between the bucket-shaped screen drum 2 and the head screen frame 9, which helps to improve the balance and effectiveness of coal screening and ensure the screening effect of coal; by setting the inclined discharge plate 19, when the coal blocks in the bucket-shaped screen drum 2 that meet the size of the fine coal are crushed by the eccentric pressing cylinder 14, the coal blocks are discharged from the first fine coal When the filter hole 4 is screened out, the screened coal will fall on the oblique discharge plate 19, and the oblique discharge plate 19 will guide the screened coal to be discharged in the same direction as the discharge port on one side of the inner screen cylinder 8, and the crushed coal slag screened out from the first coal filter hole 4 will be screened by the screen holes on the oblique discharge plate 19 and fall into the residue storage frame 20, thereby achieving the synchronous processing and same-direction collection effect of crushing and screening large-sized coal blocks. ;

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coal preparation device for fine coal processing, comprising a bottom block (1) and a bucket-shaped screen drum (2), characterized in that: The bucket-shaped screen drum (2) is arranged on the bottom block (1), and a plurality of first filter residue holes (3) and first coal fine filter holes (4) are respectively provided on the bucket-shaped screen drum (2), and the plurality of first filter residue holes (3) are all located on a relatively narrow surface portion of the bucket-shaped screen drum (2), and the plurality of first coal fine filter holes (4) are all located on a relatively wide surface portion of the bucket-shaped screen drum (2). A rotating ring block (5) is rotatably arranged on one side of the bucket-shaped screen drum (2), and a plurality of multi-stage electric push rods (6) are fixedly arranged on one side of the rotating ring block (5), and one end of the plurality of multi-stage electric push rods (6) are commonly fixedly connected to a ring gear block (7), and an inner screen drum (8) is fixedly connected to the interior of the ring gear block (7), and one end of the inner screen drum (8) is connected to a head screen frame (9), and the The inner screen cylinder (8) and the head screen frame (9) are provided with a plurality of second filter residue holes (10); the head screen frame (9) is located in the bucket-shaped screen cylinder (2), and the head screen frame (9) is adapted to the cross-sectional size thereof in the bucket-shaped screen cylinder (2); the limit position of the head screen frame (9) is located at the boundary between the first filter residue hole (3) and the first final coal filter hole (4) on the bucket-shaped screen cylinder (2); a plurality of second final coal filter holes (11) are provided on one side of the head screen frame (9); two connecting rods (12) are fixedly connected in the rotating ring block (5); one end of each of the two connecting rods (12) is fixedly connected to an eccentric pressure block (13); an eccentric pressure cylinder (14) is provided outside the inner screen cylinder (8); and a driving mechanism (15) is provided on the bottom block (1).

2. A coal preparation device for fine coal processing according to claim 1, characterized in that: Each of the eccentric pressure blocks (13) is located in an eccentric pressure cylinder (14), a limiting ring block (16) is arranged inside the eccentric pressure cylinder (14), and the limiting ring block (16) is located on one side of the eccentric pressure block (13), and a plurality of guide blocks (17) are arranged on the inner wall of the head screen frame (9).

3. The coal preparation device for fine coal processing according to claim 1 is characterized in that: The driving mechanism (15) comprises a first slip ring block (151), the first slip ring block (151) being fixedly arranged on the bucket-shaped screen drum (2), two side sliders (152) being circularly slidably arranged on the first slip ring block (151), two synchronous electric push rods (153) being fixedly arranged on one side of the two side sliders (152), and a fixing block (154) being fixedly arranged at one end of the two synchronous electric push rods (153).

4. A coal preparation device for fine coal processing according to claim 3, characterized in that: A first motor (155) is fixedly disposed on one side of the fixed block (154); a first gear (156) is fixedly disposed on the output shaft of the first motor (155); and the first gear (156) is meshed with the ring gear block (7).

5. The coal preparation device for fine coal processing according to claim 3 is characterized in that: Two upright posts (157) are fixedly arranged on the bottom block (1), and the far sides of the two side sliders (152) are respectively rotatably arranged on the near sides of the two upright posts (157). An arc cylinder (159) is fixedly arranged on the bottom block (1) via a first connecting block (158), and a second connecting block (1510) is fixedly arranged on the top end of the arc cylinder (159).

6. A coal preparation device for fine coal processing according to claim 5, characterized in that: A second slip ring block (1511) is fixedly arranged on the bucket-shaped screen drum (2), a bottom sliding block (1512) is circularly slidably arranged on the second slip ring block (1511), and the bottom of the bottom sliding block (1512) is connected to the second connecting block (1510).

7. A coal preparation device for fine coal processing according to claim 6, characterized in that: A second motor (1513) is fixedly arranged on the second connecting block (1510), a second gear (1514) is fixedly arranged on the output shaft of the second motor (1513), a crown gear ring (1515) is arranged on one side of the second slip ring block (1511), the second gear (1514) and the crown gear ring (1515) are meshed with each other, and the first slip ring block (151) and the second slip ring block (1511) are both located at two end portions of the bucket-shaped screen drum (2).

8. The coal preparation device for fine coal processing according to claim 5, characterized in that: The adjacent sides of the two uprights (157) are fixedly provided with an oblique discharge plate (19) via a connecting block (18); the oblique discharge plate (19) is located at the position of the first final coal filter hole (4) on the bucket-shaped screen drum (2); and a residue storage frame (20) is fixedly provided on the bottom block (1).

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