Coal gangue crushing wet material screening device

Abstract

The invention relates to the technical field of coal gangue treatment equipment, and particularly discloses a coal gangue crushing wet material screening device which comprises a box base and a screen drum, the upper surface of the box base communicates with two receiving hoppers, the screen drum is rotationally arranged above the two receiving hoppers, one end of the screen drum is connected with a feeding assembly, and the other end of the screen drum is connected with a discharging assembly. A coarse material discharging opening is formed in the outer circle face of the side, away from the feeding assembly, of the screen drum, screen holes are formed in the outer circle face of the screen drum located between the feeding assembly and the coarse material discharging opening, an end column is fixed to the end face of the side, close to the coarse material discharging opening, of the screen drum, and multiple sets of sliding rods arranged in the radial direction are evenly fixed to the outer circle face of the end column. Each set of sliding rods is sleeved with a balance weight impact block in a sliding mode. Full-automatic efficient screening treatment of the coal gangue crushing wet materials is achieved, online dredging of the screen holes is achieved through vibration generated by the impact effect, and the screening effect on the coal gangue crushing wet materials in the long-term running process of the screen drum is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of coal gangue treatment equipment, and specifically discloses a screening device for crushed wet coal gangue. Background Art

[0002] As the main means of resource utilization of coal gangue, decarbonization sintering of coal gangue requires the coal gangue to be crushed first before decarbonization sintering. After crushing, a screening machine is used to screen out large-particle coarse aggregates and small-particle fine materials. The screened fine materials are then processed by a granulator to prepare granular materials of appropriate size to ensure the ventilation effect and calcination uniformity during the subsequent sintering process.

[0003] Existing equipment for screening coal gangue is mainly divided into vibrating sieve plates and drums. However, no matter which type of sieve machine is used, it is impossible to avoid the occurrence of sieve hole blockage caused by high humidity and strong adhesiveness of coal gangue, resulting in the need to stop the machine for treatment after the sieve machine runs for a period of time, which seriously restricts its screening efficiency for coal gangue.

[0004] The invention application with the application number 202310803268.8 discloses an automatic screening device for crushing coal gangue, including a base, a vibration mechanism, a fixing mechanism, a laying mechanism, and a dust suction mechanism. The vibration mechanism includes a vibration machine main body and a screening component. The vibration machine main body is arranged on the base. The vibration machine main body has a feed inlet, a receiving cavity, and a discharge outlet that are sequentially connected. The screening component is detachably arranged in the receiving cavity and is used for screening coal gangue; the fixing mechanism is used to press or avoid the screening component; the laying mechanism is used to lay the coal gangue entering from the feed inlet onto the screening component; the dust suction mechanism includes a dust collection tank and a dust suction component, and the dust collection tank is arranged on the base. The automatic screening device for crushing coal gangue disclosed in this invention patent is essentially a vibrating sieve plate type sieve machine. When it is used for screening crushed wet coal gangue, once large-area blockage occurs in the sieve holes on the sieve plate, it will cause a sharp decline in the screening effect of coal gangue and cannot be cleaned online. In addition, during the vibrating screening process of crushed wet coal gangue, the fine materials will also agglomerate together due to their high water content, resulting in the inability to pass through the sieve holes smoothly and being mixed with the coarse aggregates, and the effective classification of the suction materials and the coarse aggregates cannot be achieved. Therefore, in view of the above deficiencies of the existing automatic screening device for crushing coal gangue, the present application discloses a screening device for crushed wet coal gangue that can effectively solve the above technical problems. Summary of the Invention

[0005] The present invention aims to provide a screening device for crushed wet coal gangue to solve problems such as easy sieve hole blockage and agglomeration of fine materials due to high humidity and inability to pass through the sieve holes when the existing sieve machines screen and process crushed wet coal gangue.

[0006] The present invention is achieved through the following technical solutions: A coal gangue crushing and wet material screening device, comprising a box base and a screening cylinder. The upper surface of the box base is communicated with two receiving hoppers arranged side by side, which respectively receive fine materials and coarse aggregates. The screening cylinder is rotatably arranged above the two receiving hoppers. One end of the screening cylinder is connected with a feeding assembly. On the outer circumferential surface of the screening cylinder on the side far from the feeding assembly, there is a coarse material discharge port aligned vertically with the receiving hopper for receiving coarse aggregates. On the outer circumferential surface of the screening cylinder between the feeding assembly and the coarse material discharge port, there are screening holes aligned vertically with the receiving hopper for receiving fine materials. At the center of the end wall of the screening cylinder near the coarse material discharge port, there is a fixed end post. On the outer circumferential surface of the end post, multiple groups of sliding rods arranged radially are circumferentially and evenly fixed. On each group of sliding rods, there is a sliding sleeve with a weight impact block, and the weight impact block is fixedly connected with a feeding steel plate extending towards the side of the screening holes. On the box base, there is a rotary drive assembly for driving the screening cylinder assembly to rotate around its own central axis.

[0007] As a further setting of the above solution, one end of the screening cylinder is open, and the other end is sealed. The end post is fixedly connected to the center of the sealed end face of the screening cylinder.

[0008] As a further setting of the above solution, the feeding assembly includes an end cover rotatably connected to the open end of the screening cylinder and fixedly arranged relative to the box base. On the outside of the end cover, there is a feeding hopper, and the lower end of the feeding hopper is connected with a guide pipe extending to the open end of the screening cylinder.

[0009] As a further setting of the above solution, on the inner wall of the screening cylinder near the feeding assembly, there are guide vanes for pushing the material towards the coarse material discharge port.

[0010] As a further setting of the above solution, on the upper surface of the box base, a pair of support wheels are arranged at each of the left and right ends. On the left and right ends of the outer circumferential surface of the screening cylinder, there are roller track rings acting with the corresponding support wheels.

[0011] As a further setting of the above solution, the rotary drive assembly includes a drive motor arranged on the box base. Transmission wheels are arranged at the center of the end faces of the drive motor and the screening cylinder, and a transmission member is arranged between the two transmission wheels.

[0012] As a further setting of the above solution, the screening holes are arranged in multiple rows and circumferentially and evenly on the screening cylinder, and multiple feeding steel plates are located between adjacent two rows of screening holes.

[0013] As a further setting of the above solution, on the upper surface of the box base, there is a box cover covering the screening cylinder.

[0014] As a further setting of the above solution, at the lower end of the box base, there are two belt conveyors. The lower ends of the two receiving hoppers extend out of the box base and are arranged vertically aligned with the corresponding belt conveyors.

[0015] During the operation of the coal gangue crushing wet material screening device disclosed in the present invention, the feeding assembly feeds the material to be screened into one end of the screening cylinder. Then, due to the continuous rotation of the screening cylinder and the design of the guide vanes, the fed material will move towards the side of the coarse material discharge port, and during its movement, the fine material in the material can pass through the screen holes and fall into the corresponding receiving hopper. The un-screened coarse aggregate and the agglomerated blocky fine material will continue to move, and each time they are lifted from the bottom by the material deflecting steel plate and will slide off the material deflecting steel plate after being lifted to a certain height, thus hitting the bottom of the screening cylinder to make it fully broken and screened. Finally, the material that has not been screened after being lifted and dropped multiple times is the coarse aggregate. These coarse aggregates are pushed by the subsequent feeding material to move to the coarse material discharge port, and then are discharged from the coarse material discharge port and received by the corresponding receiving hopper.

[0016] In addition, during the rotation of the screening cylinder, when the weight impact block and the material deflecting steel plate are at the top, they will move down under their own gravity and fit with the outer cylindrical surface of the end column. Then, during the downward rotation, when the rotation exceeds a certain angle, they will quickly slide down along the slide bar under their own gravity and hit the inner wall of the screening cylinder, thereby vibrating and dredging the screen holes in the corresponding area, facilitating the effective screening of the subsequent incoming material. At the same time, when the weight impact block and the material deflecting steel plate are at the bottom, the material deflecting steel plate fits on the inner wall of the screening cylinder, and the material deflecting steel plate can lift the bottom material to a certain height and then let it fall. When rotating upwards by more than a certain angle, it will slide down again under the action of gravity to contact the outer surface of the end column to achieve reset.

[0017] Compared with the prior art, the present invention has the following beneficial effects: During the process of processing the coal gangue crushing wet material by the screening device disclosed in the present invention, it can feed materials from one end and discharge materials from the other end to realize the continuous screening process of the materials. The screened fine materials and coarse aggregates can be collected and exported by different receiving hoppers respectively, realizing the fully automated and efficient screening process of the coal gangue crushing wet material.

[0018] One end of the screening cylinder in the present invention adopts a combined mechanism of a specially designed weight impact block, slide bar, etc. By using the position change of the weight impact block during the rotation of the screening cylinder and its own gravity, it can automatically hit the screening cylinder during the downward rotation, and use the vibration generated by the impact to realize the on-line dredging of the screen holes, effectively ensuring the screening effect of the coal gangue crushing wet material during the long-term operation of the screening cylinder.

[0019] The present invention further provides a feeding steel plate extending towards the feeding end on the counterweight impact block, so that the bottom materials can be lifted by the feeding steel plate during the upward rotation process, and then complete the downward throwing and falling. Through the throwing action, the suction materials originally agglomerated due to excessive humidity can be broken, enabling them to smoothly pass through the sieve holes, further improving the screening effect of coarse and fine aggregates in the crushed wet coal gangue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic three-dimensional structure diagram of the first angle of the present invention; Figure 2 is a schematic three-dimensional structure diagram of the second angle of the present invention; Figure 3 is a schematic three-dimensional structure diagram of the box seat, receiving hopper, belt conveyor, etc. in the present invention; Figure 4 is a schematic three-dimensional structure diagram of the sieve drum, end cover, feeding hopper, etc. in the present invention; Figure 5 is a schematic three-dimensional structure diagram of the internal part of the partial section of the sieve drum in the present invention; Figure 6 is a schematic internal planar structure diagram of the side view during the operation of the present invention; Figure 7 is a schematic three-dimensional structure diagram of the end post, counterweight impact block, feeding steel plate, etc. in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to enable those skilled in the art to better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the attached Figures 1 to 7 drawings and describe the present application in detail in conjunction with the embodiments. Embodiment 1

[0024] Embodiment 1 discloses a screening device for crushed wet coal gangue. Refer to the attachedFigures 1 - 3 , including a box seat 1 and a sieve cylinder 2. The box seat 1 is stably supported on the ground by legs 3 at the four corners of the lower surface, and a material receiving opening is provided on the upper surface of the box seat 1. Two material receiving hoppers 4 arranged side by side and separated by a partition 401 are connected in the material receiving opening. One of the material receiving hoppers 4 is used to receive the screened fine material, and the other is used to receive the coarse aggregate. The lower ends of both material receiving hoppers 4 extend out of the lower surface of the box seat 1, and then a belt conveyor 5 for conveying the screened material is arranged directly below each material receiving hopper 4. A pair of support wheels 6 are arranged at the left and right ends of the upper surface of the box seat 1, and the two support wheels 6 in each pair of support wheels 6 are respectively fixedly arranged on the upper surface of the box seat 1 on the front and rear sides of the material receiving opening.

[0025] Reference appendix Figures 4 - 7 , roller track rings 7 are welded to both the left and right ends of the outer cylindrical surface of the sieve cylinder 2, and each roller track ring 7 acts on a pair of support wheels 6, so that the sieve cylinder 2 can stably rotate around its own central axis under the support of the support wheels 6, and the lower end of the sieve cylinder 2 extends to the upper ends of the two material receiving hoppers 4 through the material receiving opening.

[0026] One end of the sieve cylinder 2 is sealed, and the other end is open. An end cover 8 is rotatably connected to the open end of the sieve cylinder 2, and the end cover 8 is fixedly installed on the upper surface of the box seat 1 through a connecting block at the bottom. Then a feeding hopper 9 is welded to the outside of the end cover 8, and a guide pipe 10 extending to the open end of the sieve cylinder 2 is connected to the lower end of the feeding hopper 9. In addition, in order to reduce the dust generation during the screening process, a box cover 20 covering the sieve cylinder 2 is also arranged on the upper surface of the box seat 1.

[0027] A plurality of coarse material discharge openings 201 are uniformly arranged on the outer cylindrical surface of the sieve cylinder 2 on the side far from the end cover 8, and the coarse material discharge openings 201 are vertically aligned with one of the material receiving hoppers 4. Then a large number of sieve holes 202 are uniformly arranged on the outer cylindrical surface of the sieve cylinder 2 between the coarse material discharge openings 201 and the end cover 8. The specific size of the sieve holes 202 is formulated according to the size standard of the fine coal gangue material, so that the fine material in the coal gangue can pass through the sieve holes 202 and then fall into the other material receiving hopper 4. A rotary drive assembly 11 is connected to the sealed end of the sieve cylinder 2. The rotary drive assembly 11 includes a drive motor 111 fixed on the upper surface of the box seat 1. Then transmission wheels 112 are arranged at the output shaft of the drive motor 111 and the center of the sealed end of the sieve cylinder 2, and a corresponding transmission member 113 is arranged between the two transmission wheels 112, so that under the power input of the drive motor 111 and the power transmission of the transmission member 113, the sieve cylinder 2 can stably rotate around its own central axis. In addition, in order to realize the automatic movement of the material inside the sieve cylinder 2 towards the side of the coarse material discharge openings 201 during the rotation of the sieve cylinder 2, a plurality of guide vanes 203 are uniformly arranged on the inner wall of the sieve cylinder 2, and the guide vanes 203 are arranged at an angle relative to the axis direction of the sieve cylinder 2.

[0028] At the center of the sealing end face of the sieve cylinder 2, a end post 12 extending into the sieve cylinder 2 is fixedly connected, and the end post 12 extends to a position not exceeding the coarse material discharge opening 201. Then, a plurality of groups of radially arranged slide bars 13 are evenly welded on the outer circumferential surface of the end post 12, and the ends of the slide bars 13 extend to contact the inner wall of the sieve cylinder 2 or leave a small distance. A weight impact block 14 is arranged on each group of slide bars 13, and a slide hole matching each group of slide bars 13 is formed in the weight impact block 14. When the weight impact block 14 rotates downward from the top with the rotation of the sieve cylinder 2, once the rotation angle exceeds 100°, the weight impact block 14 will slide down rapidly along the slide bar 13 under the action of gravity and impact the inner wall of the sieve cylinder 2, so as to dredge the sieve holes 202 in the corresponding area. When the weight impact block 14 rotates upward from the bottom with the rotation of the sieve cylinder 2, once the rotation angle exceeds 100°, the weight impact block 14 will slide down again to contact the end post 12 under the action of gravity, waiting for the next impact on the sieve cylinder 2. Embodiment 2

[0029] Embodiment 2 discloses a coal gangue crushing wet material screening device which is further optimized based on the technical solution in Embodiment 1, and the same parts as those in Embodiment 1 will not be described again.

[0030] In this Embodiment 2, multiple rows of sieve holes 202 are arranged on the sieve cylinder 2, and each row of sieve holes 202 is evenly arranged in an annular array on the outer circumferential surface of the sieve cylinder 2. At the same time, the sieve holes 202 in each row of sieve holes 202 are equally spaced along the axial direction.

[0031] At the same time, each group of slide bars 13 on the end post 12 is aligned with the position between two adjacent rows of sieve holes 202. Then, a feeding steel plate 15 extending axially is arranged at the end of each weight impact block 14. When the weight impact block 14 slides down and impacts the inner wall of the sieve cylinder 2, the radially outer end of the feeding steel plate 15 fits the inner wall of the sieve cylinder 2, so that during the rotation of the sieve cylinder 2, the material can be lifted and then thrown downward along the feeding steel plate 15 and impact the inner wall of the sieve cylinder 2, so that the fine materials originally agglomerated together can be shattered and sieved out through the sieve holes 202. At the same time, because the feeding steel plate 15 can also transfer the impact energy when the weight impact block 14 slides down more evenly to the sieve cylinder 2 aligned with the sieve holes 202, the sieve holes 202 on the side far from the weight impact block 14 can also dredge the originally blocked sieve holes through the impact.

[0032] During the operation of the coal gangue crushing wet material screening device disclosed in this Embodiment 2, the elevator continuously feeds the coal gangue crushing wet material into the feeding hopper 9, and then it enters the bottom of the rotating screening cylinder 2 along the material guiding pipe 10. During the rotation of the screening cylinder 2, the guide vanes 203 on its inner wall will cause the coal gangue crushing wet material to continuously move towards the side of the coarse material discharge opening 201. During the movement, the small-particle fine material will fall into the corresponding material receiving hopper 4 through the screen holes 202, and then it will be directionally sent out by the belt conveyor 5. The un-screened materials will continue to move towards the side of the coarse material discharge opening 201, and under the action of the material deflecting steel plate 15, they will rotate upward from the bottom. When reaching a certain height, the materials will slide off the material deflecting steel plate 15 and impact the bottom of the screening cylinder 2, so that the originally agglomerated materials will be shaken and broken and pass through the screen holes 202. Finally, the materials that have not been screened after several times of being lifted and falling are coarse aggregates, and they will move to the coarse material discharge opening 201 under the push of the subsequent feeding materials, and then be discharged from the coarse material discharge opening 201 and enter the corresponding material receiving hopper 4, and then be directionally sent out by the belt conveyor 5.

[0033] In addition, during the rotation of the screening cylinder 2 in this Embodiment 2, when the counterweight impact block 14 and the material deflecting steel plate 15 are at the top, they will press on the outer cylindrical surface of the end post 12 under their own gravity. Then, during the downward rotation, when rotating more than a certain angle, they will quickly slide down along the slide rod 13 under their own gravity and impact the inner wall of the screening cylinder 2, so as to vibrate and dredge the corresponding screen holes 202, thus facilitating the effective screening of the subsequent incoming materials. At the same time, when the counterweight impact block 14 and the material deflecting steel plate 15 are at the bottom, the material deflecting steel plate 15 will be attached to the inner wall of the screening cylinder 2, and the material deflecting steel plate 15 can lift the bottom materials to a certain height and then let them fall; when rotating upward more than a certain angle, it will slide down again under the action of gravity to contact the outer surface of the end post 12 to achieve reset.

[0034] The above are only the preferred embodiments of the present invention, and they are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coal gangue crushing wet material screening device, comprising a box seat and a screen drum, characterized in that: The upper surface of the box seat is connected to two receiving hoppers arranged side by side and receiving fine materials and coarse aggregates respectively. The screen drum is rotatably arranged above the two receiving hoppers. One end of the screen drum is connected to a feeding assembly. A coarse material discharge port aligned with the receiving hopper for receiving coarse aggregates is provided on the outer circumferential surface of the screen drum away from the feeding assembly. Screen holes aligned with the receiving hopper for receiving fine materials are provided on the outer circumferential surface of the screen drum located between the feeding assembly and the coarse material discharge port. An end column is fixed at the center of the end wall of the screen drum near the coarse material unloading port, and a plurality of groups of radially arranged sliding rods are evenly fixed on the outer circumferential surface of the end column. A counterweight impact block is slidably sleeved on each group of the sliding rods, and a material-moving steel plate extending toward one side of the screen hole is fixedly connected to the counterweight impact block. A rotating drive assembly for driving the screen drum assembly to rotate around its own central axis is provided on the box seat.

2. The coal gangue crushing wet material screening device according to claim 1, characterized in that: One end of the sieve cylinder is open, and the other end is sealed. The end column is fixedly connected to the center of the sealing end surface of the sieve cylinder.

3. The coal gangue crushing wet material screening device according to claim 2, characterized in that: The feeding assembly comprises an end cover which is rotatably connected to the opening end of the screen drum and fixedly arranged relative to the box seat. A feeding hopper is arranged on the outer side of the end cover, and a material guide pipe which extends to the opening end of the screen drum is connected to the lower end of the feeding hopper.

4. The coal gangue crushing wet material screening device according to any one of claims 1 to 3, characterized in that: A guide plate for pushing the material toward the coarse material discharge port is arranged on the inner wall of the screen cylinder close to the feeding assembly.

5. The coal gangue crushing wet material screening device according to claim 1, characterized in that: A pair of supporting wheels are respectively arranged at the left and right ends of the upper surface of the box seat, and roller track rings acting with the corresponding supporting wheels are respectively arranged at the left and right ends of the outer cylindrical surface of the screen drum.

6. The coal gangue crushing wet material screening device according to claim 5, characterized in that: The rotary drive assembly comprises a drive motor arranged on a box seat, and transmission wheels are arranged at the end centers of the drive motor and the screen drum, and a transmission member is arranged between the two transmission wheels.

7. The coal gangue crushing wet material screening device according to claim 1, characterized in that: The sieve holes are evenly arranged in a circumferential direction in multiple rows on the sieve cylinder, and a plurality of the material-moving steel plates are located between two adjacent rows of sieve holes.

8. The coal gangue crushing wet material screening device according to claim 1, characterized in that: A box cover covering the screen drum is arranged on the upper surface of the box seat.

9. The coal gangue crushing wet material screening device according to claim 1, characterized in that: Two belt conveyors are arranged at the lower end of the box seat, and the lower ends of the two receiving hoppers extend out of the box seat and are aligned with the corresponding belt conveyors up and down.

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