A roller-type slag screening device

Abstract

The utility model discloses a roller type slag screening device relates to industrial slag processing technical field. The utility model discloses a support frame, and four support frames of top are equipped with roller support frame and are fixed dust cover, and the coaxial nesting outer drum and built -in inner drum are in dust cover, and both are by the semicircular sieve plate module assembly of half joint block and joint groove, and are locked by bolt radially, and the sieve plate surface is opened to have the sieve hole, and the outer cylinder aperture is greater than the inner tube, the utility model discloses a modular sieve plate design through the mechanical self -lock of inverted trapezoidal joint block and joint groove, and is combined bolt positioning of mounting hole, ensures that the screen is in high -speed rotation and resists centrifugal displacement, avoids the deformation cracking problem of traditional welding sieve cylinder, supports single -block sieve plate independent replacement, and the maintenance time and cost are reduced greatly, and the composite frame of support frame and roller support frame provides rigid support for inner drum and outer drum, and the prescreening function of cooperation buffer board disperses the big particle impact force, reduces the sieve hole blockage risk.

Description

Technical Field

[0001] This utility model relates to the field of industrial slag treatment technology, specifically a drum-type slag screening device. Background Technology

[0002] Slag screening devices are specialized equipment for particle size classification of industrial slag. Utilizing vibrating screens with wear-resistant screen surfaces of specific apertures, they precisely separate the slag into oversize and undersize particles. Their core function is to remove impurities and ensure qualified particle size distribution, providing qualified raw materials for the resource utilization of slag in building materials aggregates, cement admixtures, or roadbed materials. This improves recycling efficiency, reduces dust pollution, and is a key pretreatment step in the resource utilization of slag in industries such as metallurgy and power generation. Traditional slag screening devices generally adopt an integral welded single-layer drum structure. During use, the impact of large slag particles can easily cause the screen plate to deform and crack. Maintenance requires cutting and welding the integral screen cylinder, which is not easy to install and difficult for operators to maintain. In view of this, the inventors urgently need to design a drum-type slag screening device in which the drum can be installed in separate parts. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a drum-type slag screening device to solve the technical problem that traditional screening devices are not easy to install.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a drum-type slag screening device, including a support frame, with drum support frames installed at the four corners of the top of the support frame, and a dust cover supported on the upper side of the drum support frame. The inner wall of the dust cover is coaxially sleeved with an outer drum and an inner drum built into the outer drum. Both the outer drum and the inner drum are modularly spliced ​​from multiple semi-circular screen plates. Each screen plate has a snap-fit ​​block at one end and a snap-fit ​​groove at the other end, and is radially locked by fastening bolts through mounting holes. The outer surface of the screen plate has several screen holes, and the screen hole diameter of the outer drum is larger than that of the inner drum.

[0005] By adopting the above technical solution, the composite frame structure of the support frame and the roller support frame provides stable mechanical support for the dust cover and inner and outer rollers, effectively resisting the torsional vibration generated by the rotation of the rollers.

[0006] Furthermore, a motor is fixed in the middle of the support frame, and the output shaft of the motor is connected to a drive gear. The drive gear meshes with the driven gear to form a split-type power drive source.

[0007] By adopting the above technical solution, the split power drive source consisting of the motor, the driving gear, and the driven gear avoids the torsional vibration interference caused by the traditional long transmission shaft structure, ensuring the smoothness of power transmission.

[0008] Furthermore, the inner wall of the roller support frame is equipped with rotating wheels. Two bearings are coaxially fixed on one side of the driven gear. A through rotating shaft is sleeved on the inner wall of the bearing. One end of the rotating shaft is fixedly connected to the driven gear, and the other end is coaxially connected to the rotating wheel at the bottom right corner.

[0009] By adopting the above technical solution, the through-type design of the bearing and the rotating shaft provides bidirectional synchronous power output to the driven gear and the rotating wheel, ensuring the synchronous accuracy of the coaxial rotation of the inner and outer rollers.

[0010] Furthermore, the outer wall of the dust cover is symmetrically provided with clamps, and the outer surface of the clamps is provided with an annular rotating groove, which rolls with the rotating shaft to form a rotational support.

[0011] By adopting the above technical solution, the annular rotating groove of the clamp and the rotating shaft form a rolling pair, which transforms traditional sliding friction into rolling friction, reducing frictional energy consumption and noise when the dust cover rotates.

[0012] Furthermore, a feed hopper bracket is provided on one side of the support frame, a feed hopper is installed on the top of the feed hopper bracket, and a buffer plate is provided at the outlet of the feed hopper for pre-dispersing the impact force.

[0013] By adopting the above technical solution, the separate design of the feed hopper support and the support frame isolates the vibration transmission path of the feed hopper from the screening body, thus avoiding material impact from interfering with the dynamic balance of the drum.

[0014] Furthermore, the outer roller is equipped with an outer roller discharge plate at its discharge port, and the inner roller is equipped with an inner roller discharge plate at its discharge port. The two discharge plates are inclined at an angle to guide the flow of graded materials.

[0015] By adopting the above technical solution, the inclined guiding design of the outer roller discharge plate and the inner roller discharge plate guides fine particles and coarse particles to the designated collection area according to the angle of repose characteristics of materials of different particle sizes, thus avoiding the decline in grade caused by mixing.

[0016] Furthermore, the snap-fit ​​blocks and snap-fit ​​grooves of the sieve plate adopt an inverted trapezoidal cross-section design, which, together with the bolt positioning of the mounting holes, achieves self-locking and anti-displacement during splicing.

[0017] By adopting the above technical solution, the inverted trapezoidal cross-section of the locking block and the locking groove constitutes a mechanical self-locking structure, which generates a radial component force under the action of bolt pre-tightening force, thus counteracting the centrifugal displacement trend when the screen plate rotates.

[0018] In summary, the present invention has the following main advantages: 1. This utility model, through its modular screen plate design, utilizes the mechanical self-locking of the inverted trapezoidal locking block and locking groove, combined with the bolt positioning of the mounting holes, to ensure that the screen resists centrifugal displacement during high-speed rotation, avoiding the deformation and cracking problems of traditional welded screen cylinders. At the same time, this design supports independent replacement of individual screen plates, significantly reducing maintenance time and costs. Meanwhile, the composite frame of the support frame and the drum support frame provides rigid support for the inner and outer drums. Combined with the pre-screening function of the buffer plate, it disperses the impact force of large particles, reducing the risk of screen hole blockage. The gradient classification of the screen holes of the inner and outer drums further realizes the continuous and accurate separation of coarse, medium and fine slag, improving screening efficiency and resource recovery rate. 2. This utility model uses a motor to drive the rotating shaft directly via a drive gear and a driven gear, transmitting power to the rotating wheel through bearings. This eliminates torsional vibration interference from long transmission chains and ensures the synchronous rotation stability of the inner and outer rollers. At the same time, the rotating wheel and the annular rotating groove of the clamp form a rolling friction pair, significantly reducing rotational resistance and energy consumption. Meanwhile, the dust cover fully encloses the nested roller, blocking the dust escape path. Its rigid connection with the clamp, combined with the radial constraint of the rotating shaft by the rotating groove, simultaneously solves the problems of sealing and axial movement. The inclined inner and outer roller discharge plates at the discharge port prevent material mixing through gravity guidance, ensuring the purity of the graded materials. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a schematic diagram of the three-dimensional structure of the inner and outer rollers of this utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the inner and outer rollers of this utility model.

[0020] In the diagram: 1. Support frame; 2. Dust cover; 3. Outer roller; 4. Inner roller; 5. Motor; 6. Drive gear; 7. Bearing; 8. Rotating shaft; 9. Rotating wheel; 10. Clamp; 11. Feed hopper support; 12. Feed hopper; 13. Inner roller discharge plate; 14. Outer roller discharge plate; 15. Buffer plate; 16. Screen plate; 17. Mounting hole; 18. Clip block; 19. Clip groove; 20. Rotating groove; 21. Roller support frame; 22. Driven gear; 23. Screen hole. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] In this embodiment: A drum-type slag screening device, such as Figure 1-5 As shown, the system includes a support frame 1, with roller support frames 21 installed at the four corners of the top of the support frame 1. A dust cover 2 is supported on the upper side of the roller support frame 21. An outer roller 3 and an inner roller 4 are coaxially sleeved on the inner wall of the dust cover 2. Both the outer roller 3 and the inner roller 4 are modularly assembled from multiple semi-circular screen plates 16. Each screen plate 16 has a locking block 18 at one end and a locking groove 19 at the other end, and is radially locked through fastening bolts in mounting holes 17. The outer surface of the screen plate 16 has... The outer roller 3 has a number of screen holes 23, and the screen hole diameter of the outer roller 3 is larger than that of the inner roller 4. The composite frame structure of the support frame 1 and the roller support frame 21 provides stable mechanical support for the dust cover 2, the inner roller 4, and the outer roller 3, effectively resisting the torsional vibration generated by the rotation of the rollers. At the same time, the modularly spliced ​​semi-circular screen plate 16 is used, and the positioning structure of the snap-fit ​​block 18 and the snap-fit ​​groove 19 is used in conjunction with bolts to lock the inner roller 4 and the outer roller 3, so as to realize the quick disassembly and maintenance of the inner roller 4 and the outer roller 3, and greatly reduce the replacement cost when the screen is partially damaged.

[0023] See Figure 1 , Figure 2 , Figure 3 The motor 5 is fixed in the middle of the support frame 1. The output shaft of the motor 5 is connected to the drive gear 6. The drive gear 6 meshes with the driven gear 22 to form a split power drive source. The split power drive source formed by the motor 5, the drive gear 6, and the driven gear 22 avoids the torsional vibration interference caused by the traditional long transmission shaft structure and ensures the smoothness of power transmission. At the same time, this layout fixes the motor 5 in the middle of the support frame 1 and directly drives the driven gear 22 through the meshing of the short shaft gear, reducing the energy loss in the transmission link. Moreover, the gearbox is independent of the roller system, which facilitates the quick separation of the power unit during maintenance and significantly improves the maintainability of the equipment.

[0024] See Figure 1 , Figure 2 , Figure 4 , Figure 5The inner wall of the roller support frame 21 is equipped with rotating wheels 9. Two bearings 7 are coaxially fixed on one side of the driven gear 22. The inner wall of the bearing 7 is fitted with a through rotating shaft 8. One end of the rotating shaft 8 is fixedly connected to the driven gear 22, and the other end is coaxially connected to the rotating wheel 9 at the bottom right corner. The through design of the bearing 7 and the rotating shaft 8 provides bidirectional synchronous power output from the driven gear 22 to the rotating wheel 9, ensuring the synchronous accuracy of the coaxial rotation of the inner roller 4 and the outer roller 3. At the same time, the rotating wheels 9 are evenly distributed on the inner wall of the roller support frame 21. Through rolling friction, they support the dust cover 2 and the roller assembly, greatly reducing the rotational resistance. The compact layout of the rotating shaft 8, with one end connected to the driven gear 22 and the other end directly connected to the rotating wheel 9, effectively shortens the force transmission path, reduces the risk of wear of the bearing 7 due to off-center load, and extends the service life of the core transmission components.

[0025] See Figure 1 , Figure 2 , Figure 3 The outer wall of the dust cover 2 is symmetrically provided with clamps 10. The outer surface of the clamps 10 is provided with an annular rotating groove 20. The rotating groove 20 and the rotating shaft 8 roll together to form a rotational support. The annular rotating groove 20 of the clamps 10 and the rotating shaft 8 form a rolling pair, which transforms the traditional sliding friction into rolling friction, reducing the frictional energy consumption and noise when the dust cover 2 rotates. At the same time, the symmetrically distributed clamps 10, through the arc envelope of the rotating groove 20, achieve radial constraint and axial limit on the rotating shaft 8, preventing axial movement caused by centrifugal force during the operation of the drum.

[0026] See Figure 1 , Figure 2 , Figure 3 A feed hopper support 11 is provided on one side of the support frame 1, and a feed hopper 12 is installed on the top of the feed hopper support 11. A buffer plate 15 is provided at the outlet of the feed hopper 12 to pre-disperse the impact force. The separate design of the feed hopper support 11 and the support frame 1 isolates the vibration transmission path of the feed hopper 12 from the screening body, avoiding material impact from interfering with the dynamic balance of the drum. At the same time, the inclined grid structure of the buffer plate 15 forms a multi-stage diversion at the feed inlet, so that large pieces of slag are evenly dispersed at the feed end of the inner drum 4, reducing the concentrated impact on the screen plate 16.

[0027] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5The outer roller 3 is equipped with an outer roller discharge plate 14 at its discharge port, and the inner roller 4 is equipped with an inner roller discharge plate 13 at its discharge port. The two discharge plates are inclined to guide the flow of graded materials. The inclined flow guiding design of the outer roller discharge plate 14 and the inner roller discharge plate 13 guides fine particles and coarse particles to the designated collection area according to the angle of repose characteristics of materials of different particle sizes, avoiding the grade drop caused by mixing. At the same time, the separate layout of the two-stage discharge plates allows the coarse particles of the inner roller 4 to be discharged directly, while the fine particles of the outer roller 3 are collected through an independent channel, eliminating cross-contamination of materials. The optimized inclination angle of the discharge plates also significantly reduces the amount of sticky and wet slag residue stuck on the wall at the discharge port.

[0028] See Figure 4 , Figure 5 The snap-fit ​​block 18 and snap-fit ​​groove 19 of the screen plate 16 adopt an inverted trapezoidal cross-section design. With the bolt positioning of the mounting hole 17, the splicing self-locking and anti-displacement are achieved. The inverted trapezoidal cross-section of the snap-fit ​​block 18 and the snap-fit ​​groove 19 constitutes a mechanical self-locking structure. Under the action of the bolt preload, a radial component force is generated to counteract the centrifugal displacement tendency when the screen plate 16 rotates. At the same time, the inverted trapezoidal mating surface applies a vertical clamping force through the bolt of the mounting hole 17, so that the inclined surface of the snap-fit ​​block 18 and the inclined surface of the snap-fit ​​groove 19 are tightly fitted, forming a double constraint against shear misalignment.

[0029] The implementation principle of this embodiment is as follows: Slag enters through the feed hopper 12, is dispersed by the buffer plate 15, and is evenly introduced into the inner drum 4. The motor 5 drives the drive gear 6 to mesh with the driven gear 22, which in turn drives the rotating wheel 9 via the rotating shaft 8 and bearing 7, causing the inner drum 4 and outer drum 3 inside the dust cover 2 to rotate synchronously. The slag tumbles and is classified inside the inner drum 4. Fine particles pass through the sieve holes 23 and fall into the outer drum 3 for secondary screening, while coarse particles are discharged along the inner drum discharge plate 13. The slag entering the outer drum 3 is further separated, and the fine particles are further separated. Particles fall through the sieve holes 23 to the bottom collection area. Medium-sized particles are discharged by the outer drum discharge plate 14. The modular sieve plate 16 is self-locking and anti-deviation through the inverted trapezoidal snap-fit ​​block 18 and snap-fit ​​groove 19, and is reinforced by the bolts in the mounting holes 17 to ensure the stability of the sieve structure. The dust cover 2 maintains a low-resistance seal by rolling cooperation with the rotating shaft 8 through the annular rotating groove 20 of the clamp 10. The entire system relies on the support frame 1 and the drum support frame 21 to provide rigid support. Combined with the buffer plate pre-dispersion and the double-stage drum screening, it achieves continuous, efficient and closed operation.

[0030] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A drum-type slag screening device, characterized in that: The system includes a support frame (1), with roller support frames (21) installed at the four corners of the top of the support frame (1). The upper side of the roller support frame (21) supports a dust cover (2). The inner wall of the dust cover (2) is coaxially fitted with an outer roller (3) and an inner roller (4) built into the outer roller (3). The outer roller (3) and the inner roller (4) are both modularly assembled from multiple semi-circular screen plates (16). Each screen plate (16) has a snap-fit ​​block (18) at one end and a snap-fit ​​groove (19) at the other end. The screen plates (16) are radially locked by fastening bolts in the mounting holes (17). The outer surface of the screen plates (16) has several screen holes (23), and the diameter of the screen holes (23) of the outer roller (3) is larger than that of the inner roller (4).

2. The drum-type slag screening device according to claim 1, characterized in that: The motor (5) is fixed in the middle of the support frame (1), and the output shaft of the motor (5) is connected to the drive gear (6). The drive gear (6) meshes with the driven gear (22) to form a split power drive source.

3. The drum-type slag screening device according to claim 2, characterized in that: The inner wall of the roller support frame (21) is equipped with rotating wheels (9). Two bearings (7) are coaxially fixed on one side of the driven gear (22). The inner wall of the bearing (7) is fitted with a through rotating shaft (8). One end of the rotating shaft (8) is fixedly connected to the driven gear (22), and the other end is coaxially connected to the rotating wheel (9) at the bottom right corner.

4. The drum-type slag screening device according to claim 1, characterized in that: The outer wall of the dust cover (2) is symmetrically provided with clamps (10), and the outer surface of the clamps (10) is provided with an annular rotating groove (20). The rotating groove (20) and the rotating shaft (8) roll together to form a rotating support.

5. The drum-type slag screening device according to claim 1, characterized in that: A feed hopper support (11) is provided on one side of the support frame (1), a feed hopper (12) is installed on the top of the feed hopper support (11), and a buffer plate (15) is provided at the outlet of the feed hopper (12) for pre-dispersing the impact force.

6. The drum-type slag screening device according to claim 5, characterized in that: The outer roller (3) is equipped with an outer roller discharge plate (14) at its discharge port, and the inner roller (4) is equipped with an inner roller discharge plate (13) at its discharge port. The two discharge plates are inclined at an angle to guide the flow of graded materials.

7. The drum-type slag screening device according to claim 1, characterized in that: The snap-fit ​​block (18) and snap-fit ​​groove (19) of the sieve plate (16) adopt an inverted trapezoidal cross section design, which, together with the bolt positioning of the mounting hole (17), realizes splicing self-locking and anti-displacement.

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