Cement waste screening and recycling device

Abstract

The present application relates to the field of cement. The cement waste screening and recycling device comprises a machine frame, a rotary screen rotationally connected to the machine frame, a vibrating screen arranged below the rotary screen and a driving device used for driving the rotary screen to rotate, a rolling barrel is arranged in the rotary screen, a rotating shaft is connected in the rolling barrel, and the rotating shaft is connected with the vibrating screen. The rotary shaft and the rolling barrel are not coaxially arranged, a swing part used for driving the rotary shaft to swing in a reciprocating mode is arranged on the machine frame, and the rotary shaft swings in a reciprocating mode to drive the rolling barrel to roll large-particle soil blocks in the rotary screen. The construction waste screening device has the effects that the situation that large-particle soil blocks are doped in construction waste for discharging is reduced, and the screening quality is improved.

Description

Technical Field

[0001] This application relates to the field of cement, and in particular to a cement waste screening and recycling device. Background Technology

[0002] Screening and recycling of cement waste is a crucial step in achieving resource recycling in the building materials industry, especially given the growing demand for efficient processing of waste materials such as lumpy cement, mixed crushed soil, and substandard semi-finished products generated during production. While traditional screening technologies are widely used in the grading of sand, gravel, and construction waste, existing equipment often suffers from problems such as screen clogging, incomplete separation of fine particles, and secondary pollution due to the unique characteristics of cement waste, including high viscosity, easy agglomeration of fine powder, and easy compaction of crushed soil. This not only leads to the loss of recyclable materials but also increases energy consumption and environmental governance costs due to low screening efficiency, hindering the large-scale reuse of cement waste.

[0003] Current mainstream rotary drum screens (typically including a feeding device, multi-stage screens, and a discharging device) achieve particle size classification through rotating screens. While they offer advantages such as high sorting accuracy and low investment costs, they have significant drawbacks when processing cement waste containing broken soil. During the screening process, the broken soil easily solidifies into lumps on the screen surface due to moisture or stickiness, forming agglomerates with particle sizes close to those of construction waste. This prevents them from passing through the corresponding screen openings, ultimately resulting in them being discharged mixed with larger particles of waste. This phenomenon not only reduces the broken soil recovery rate but also affects the subsequent recycling performance of the waste due to the mixed soil lumps. Utility Model Content

[0004] In order to reduce the mixing of large soil particles with construction waste and improve the screening quality, this application provides a cement waste screening and recycling device.

[0005] The cement waste screening and recycling device provided in this application adopts the following technical solution:

[0006] A cement waste screening and recycling device includes a frame, a drum screen rotatably connected to the frame, a vibrating screen disposed below the drum screen, and a drive device for driving the drum screen to rotate. A compaction cylinder is disposed inside the drum screen, and a rotating shaft is connected inside the compaction cylinder. The rotating shaft and the compaction cylinder are not coaxially disposed. A swinging component is disposed on the frame for driving the rotating shaft to swing back and forth. The swinging back and forth of the rotating shaft drives the compaction cylinder to crush large soil particles inside the drum screen.

[0007] By adopting the above technical solution, the drum screen is used to separate construction waste from sand and gravel in cement waste; the vibrating screen is used to separate stones from broken soil in sand and gravel; the swinging component can drive the rotating shaft to swing back and forth, thereby driving the rolling cylinder connected to the rotating shaft to make eccentric movements in the drum screen. As the distance between the rolling cylinder and the drum screen decreases, the rolling cylinder and the drum screen can crush the larger broken soil particles in the drum screen into broken soil, which then falls onto the vibrating screen below to complete the feeding.

[0008] Optionally, the swing element includes a cylinder mounted on the frame and a rack connected to the piston rod of the cylinder, with a gear connected to one end of the rotating shaft, and the rack meshing with the gear.

[0009] By adopting the above technical solution, the piston rod of the cylinder drives the rack to move back and forth by extending and shortening, which in turn drives the gear meshing with the rack to rotate back and forth. Since the gear is connected to the shaft, it drives the shaft to swing back and forth.

[0010] Optionally, a limiting wheel is rotatably connected to the frame, the limiting wheel abutting against the side of the rack away from the gear, the limiting wheel being used to prevent the rack from separating from the gear.

[0011] By adopting the above technical solution, the setting of the limiting wheel can restrict the rack's movement between itself and the gear without affecting the rack's rotation, thereby ensuring that the rack is always meshed with the gear.

[0012] Optionally, a connecting rod is provided between the inner wall of the compaction cylinder and the outer wall of the rotating shaft. Multiple connecting rods are provided at intervals along the circumference of the rotating shaft, and the lengths of the multiple connecting rods are different.

[0013] By employing the aforementioned technical solution, the varying lengths of the connecting rods result in varying distances from the rotating shaft connected to the compaction cylinder to different parts of the cylinder, causing the rotating shaft and the central axis of the compaction cylinder to not coincide. Therefore, when the oscillating component drives the rotating shaft to oscillate back and forth, the shaft causes the compaction cylinder to move eccentrically within the drum screen, thus altering the distance between the compaction cylinder and the drum screen. As the distance decreases, the broken soil clods between the compaction cylinder and the drum screen are crushed and broken up.

[0014] Optionally, the outer wall of the rolling cylinder is machined with rolling teeth.

[0015] By adopting the above technical solution, the setting of the compaction teeth can more easily crush and break up the soil clods compared to the contact between the compaction cylinder and the soil clods, thus further improving the compaction efficiency.

[0016] Optionally, the driving device includes a rotating drum rotatably connected to the frame and a motor for driving the rotating drum to rotate. A transmission component is provided between the rotating drum and the drum screen, and the rotating drum drives the drum screen to rotate through the transmission component.

[0017] By adopting the above technical solution, the motor rotates and drives the drum to rotate. The drum is driven by the transmission component to the drum screen. The drum screen rolls under the drive of the transmission component, so that the cement waste inside the drum screen moves with the rolling of the drum screen. In this process, the larger construction waste particles in the cement waste are discharged through the end of the drum screen, while the smaller waste particles such as sand and gravel fall through the screen surface of the drum screen to the vibrating screen below for secondary screening.

[0018] Optionally, the transmission component includes a transmission wheel sleeved on the outside of the rotating shaft and a guide rail arranged circumferentially around the outer wall of the drum screen. The transmission wheel is partially embedded in the guide rail and abuts against the outer wall of the drum screen.

[0019] By adopting the above technical solution, the embedded setting of the transmission wheel and the guide rail can maintain their relative positional relationship during the rotation of the drum screen driven by the rotating shaft; the abutment setting between the transmission wheel and the outer wall of the drum screen can apply a thrust to the drum screen while the rotating shaft drives the transmission wheel to rotate, thereby causing the drum screen to rotate accordingly.

[0020] Optionally, a protective cover is provided on the frame, and the protective cover is fitted over the outside of the drum screen.

[0021] By adopting the above technical solution, the protective cover can, on the one hand, prevent the drum screen from derailing from the frame during rotation, thereby accidentally injuring the operator; on the other hand, it can effectively prevent the material inside the drum screen from splashing in all directions, controlling the material to only exit through the end of the drum screen or fall into the vibrating screen below.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By setting the roller and the rotating shaft to different axes, the roller can move eccentrically inside the drum screen as the rotating shaft swings back and forth, thereby changing the distance between the roller and the drum screen. When the distance between the roller and the drum screen is shortened, the roller can compact larger soil clods in the drum screen.

[0024] 2. By setting up the swinging component, the extension and shortening of the cylinder piston rod causes the rack to drive the gear to reciprocate, which in turn causes the gear to drive the rotating shaft to reciprocate through the rotating rod and connecting handle. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this application.

[0026] Figure 2 This is a partial cross-sectional schematic diagram of the overall structure of this application.

[0027] Figure 3 yes Figure 1 Enlarged diagram of point A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Support leg; 12. Support plate; 121. Discharge hole; 13. Support base; 14. Protective cover; 15. Support rod; 151. Mounting plate; 2. Feeding device; 21. Feeding frame; 22. Feeding hopper; 221. Feeding plate; 3. Drum screen; 31. Collar; 32. Guide rail; 4. Drive device; 41. Rotary drum; 42. Motor; 43. Transmission wheel; 5. Vibrating screen; 6. Compacting device; 61. Compacting cylinder; 62. Compacting teeth; 63. Rotating shaft; 631. Gear; 64. Connecting rod; 65. Swinging component; 651. Cylinder; 652. Rack; 653. Limiting groove; 66. Limiting wheel; 7. Compacting space; 8. Collection device; 81. Waste collection box; 82. Stone collection box; 83. Sand collection box; 84. Discharge plate. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0030] This application discloses a cement waste screening and recycling device. (Refer to...) Figure 1 The cement waste screening and recycling device includes a frame 1, a feeding device 2 located at one end of the frame 1, a drum screen 3 rotatably connected to the frame 1, a drive device 4 located on the frame 1 for driving the drum screen 3 to rotate, and a vibrating screen 5 located below the drum screen 3. In use, the feeding device 2 first feeds the cement waste into the drum screen 3. Driven by the drive device 4, the drum screen 3 separates the mixed construction waste and cement. The construction waste and cement are discharged from the drum screen 3, and the discharged cement then falls onto the vibrating screen 5, where it is screened into cement blocks and broken soil under the vibration of the vibrating screen 5, thus completing the recycling and screening of the cement waste.

[0031] Reference Figure 1 The frame 1 includes four support legs 11 placed at intervals on the ground and a support plate 12 fixed to the same end of the four support legs 11. Two sets of support seats 13 are vertically fixed to the support plate 12 at intervals. The two sets of support seats 13 are located near the opposite two edges of the support plate 12, and two support seats 13 are arranged at intervals along the length of the support plate 12.

[0032] Reference Figure 1The drive unit 4 includes a rotating drum 41 rotatably connected to each set of support bases 13 and a motor 42 mounted on the frame 1 for driving the rotating drum 41 to rotate. Each support base 13 has a rotating hole for the rotating drum 41 to pass through. The motor 42 is mounted on one side of the support base 13, and the output shaft of the motor 42 is fixedly connected to the rotating drum 41. The drum screen 3 is located between two rotating drums 41, and a transmission component is provided between the rotating drum 41 and the drum screen 3.

[0033] Reference Figure 1 and Figure 2 The transmission components include transmission wheels 43 fixed to the end of the rotating drum 41, with one transmission wheel 43 at each end of each rotating drum 41. Two collars 31 are fixedly and spaced apart on the outer wall of the drum screen 3 near its end, forming guide rails 32 between the two collars 31 and the drum screen 3 for the transmission wheels 43 to partially embed. One guide rail 32 is provided at each end of the drum screen 3. A discharge hole 121 is provided on the support plate 12, vertically opposite to the drum screen 3 and along the length of the support plate 12. In use, the motor 42 is started, causing the rotating drum 41 to rotate, which in turn drives the transmission wheels 43 on the rotating drum 41 to rotate. After the transmission wheels 43 embed into the guide rails 32, they abut against the outer wall of the drum screen 3, thereby driving the drum screen 3 to rotate. This separates the cement waste in the drum screen 3 into large-particle construction waste and cement. The separated construction waste is discharged from the open end of the drum screen 3, while the cement falls through the discharge hole 121 onto the vibrating screen 5 below.

[0034] Reference Figure 1 To prevent the drum screen 3 from detaching from the frame 1 during rotation and injuring workers, an arc-shaped protective cover is fixed to the support plate 12. The protective cover is fitted over the outside of the drum screen 3 with its two ends located on opposite sides of the first discharge port, and the protective cover is set along the length of the drum screen 3.

[0035] Understandably, cement waste contains large clumps of soil. These clumps cannot pass through the cylinder wall of the drum screen 3 during the screening process and will be mixed with the large construction waste particles, thus reducing the quality of the screening and recycling. Therefore, the drum screen 3 is also equipped with a compaction device 6 for crushing the soil clumps.

[0036] Reference Figure 1 and Figure 2 The compaction device 6 includes a compaction cylinder 61 that is oscillatingly connected inside the drum screen 3, forming a compaction space 7 between the compaction cylinder 61 and the drum screen 3 for compacting the broken soil clods. Compaction teeth 62 are machined on the outer wall of the compaction cylinder 61.

[0037] Reference Figure 1 and Figure 2A rotating shaft 63 is installed inside the compaction cylinder 61. Connecting rods 64 are fixed between the outer wall of the rotating shaft 63 and the inner wall of the compaction cylinder 61. Two sets of connecting rods 64 are provided, located near the two ends of the compaction cylinder 61. Each set of connecting rods 64 has three rods spaced at intervals along the circumference of the outer wall of the rotating shaft 63. The lengths of the three connecting rods 64 are different, ensuring that the rotating shaft 63 and the compaction cylinder 61 are not coaxial. A swinging component 65 is installed on the support plate 12 to drive the rotating shaft 63 to reciprocate. In use, cement material is fed into the compaction space 7 via the feeding mechanism. Driven by the swinging component 65, the rotating shaft 63 reciprocates, thereby causing the compaction cylinder 61 to move eccentrically within the drum screen 3, changing the distance between it and the inner wall of the drum screen 3. When the distance between the compaction cylinder 61 and the drum screen 3 decreases, the compaction space 7 also decreases, thus crushing and breaking up the soil clods.

[0038] Reference Figure 3 Two support rods 15 are vertically spaced and fixed to the support plate 12. The two support rods 15 are located near the drum screen 3 and away from the feeding device 2. A mounting plate 151 is fixed between the two support rods 15 and is located away from the support plate 12. The swinging component 65 includes a cylinder 651 mounted on the side of one of the support rods 15 away from the mounting plate 151 and a rack 652 horizontally fixed to the piston rod of the cylinder 651. One end of the rotating shaft 63 passes through the mounting plate 151 and extends to the side of the mounting plate 151 away from the crushing cylinder 61. A gear 631 is fixed to the end of the rotating shaft 63 extending out of the mounting plate 151. In use, the piston rod of cylinder 651 normally drives rack 652 to pass above rotating shaft 63 and mesh with gear 631. When cylinder 651 is started, the piston rod of cylinder 651 extends and retracts, driving gear 631 to rotate back and forth at a set angle, which in turn drives rotating shaft 63 connected to gear 631 to swing back and forth, thereby realizing the reciprocating eccentric motion of crushing cylinder 61 in drum screen 3.

[0039] Understandably, the rack 652 may disengage from the gear 631 during operation; therefore, a limiting component is also provided to restrict the movement of the rack 652. (Refer to...) Figure 3 The limiting component includes a limiting wheel 66 rotatably connected to the mounting plate 151 and located above the rotating shaft 63. A limiting groove 653 is provided on the side of the rack 652 away from the roller, allowing the limiting wheel 66 to partially engage and slide. In use, the limiting wheel 66 can abut against the bottom of the limiting groove 653 and slide within the limiting groove 653 in coordination with the movement of the rack 652, so that the rack 652 can always be limited to move between the limiting wheel 66 and the gear 631.

[0040] Reference Figure 1The feeding device 2 includes a feeding frame 21 mounted on a support plate 12 and located near one end of the support plate 12, and a feeding hopper 22 fixed to the feeding frame 21. The bottom of the feeding hopper 22 is connected to an inclined feeding plate 221, the slope of which gradually decreases from the end away from the drum screen 3 towards the end closer to the drum screen 3. The lowest end of the feeding plate 221 extends into the compaction space 7. In use, cement material is fed into the feeding hopper 22, and the material in the feeding hopper 22 enters the compaction space 7 along the slope of the feeding plate 221, and is then screened as the drum screen 3 rotates.

[0041] To facilitate the collection of the multi-stage materials separated by screening, a collection device 8 is also provided for collecting the multi-stage materials separated by screening. (Refer to...) Figure 1 The collection device 8 includes a waste collection box 81, a stone collection box 82, and a sand collection box 83 located on the ground at the discharge end of the drum screen 3 and the vibrating screen 5.

[0042] The discharge ends of the drum screen 3 and the vibrating screen 5 are also provided with discharge plates 84. The two discharge plates 84 are respectively provided with slopes. The slopes of the two discharge plates 84 decrease from the end closer to the drum screen 3 or the vibrating screen 5 to the end farther away from the drum screen 3 or the vibrating screen 5, so that the material discharged from the drum screen 3 or the vibrating screen 5 can slide into the waste collection box 81 or the stone collection box 82 along the slope of the discharge plate 84.

[0043] It is understood that the structure and function of the vibrating screen 5 in this embodiment are the same as those of the existing vibrating screen 5, and will not be described in detail here.

[0044] The implementation principle of the cement waste screening and recycling device in this application embodiment is as follows: When in use, two motors 42, cylinder 651 and vibrating screen 5 are started respectively. Cement waste is added into the feeding device 2. The cement waste is fed into the drum screen 3 through the feeding device 2. The drum screen 3 rotates continuously under the drive of motor 42 to screen the cement waste. Among them, the larger construction waste particles are fed into the waste collection box 81 through the opening end of the drum screen 3, and the smaller sand particles fall onto the vibrating screen 5 below through the discharge port. After screening by the vibrating screen 5, the gravel falls into the stone collection box 82 and the sand falls into the sand collection box 83. During the screening process of the drum screen 3, the piston rod of the cylinder 651 extends and retracts, driving the rack 652 to reciprocate, which in turn drives the rotating shaft 63 to reciprocate. Since the rotating shaft 63 and the roller 61 are not coaxially arranged, the roller 61 moves eccentrically within the drum screen 3 under the drive of the rotating shaft 63. As the distance between the roller 61 and the drum screen 3 decreases, the roller teeth 62 on the roller 61 come into contact with and crush the larger soil particles in the construction waste, turning the soil particles into smaller ones that are then fed onto the vibrating screen 5 for secondary screening. Through a cement waste screening and recycling device, the roller 61 can move eccentrically within the drum screen 3 under the drive of the rotating shaft 63, thereby crushing the larger soil particles mixed in with the cement waste, allowing them to be screened out through multi-stage screening, effectively improving the quality of cement waste screening.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cement waste screening and recycling device, characterized in that: The device includes a frame (1), a drum screen (3) rotatably connected to the frame (1), a vibrating screen (5) located below the drum screen (3), and a drive device (4) for driving the drum screen (3) to rotate. A compaction cylinder (61) is provided inside the drum screen (3), and a rotating shaft (63) is connected inside the compaction cylinder (61). The rotating shaft (63) is not coaxial with the compaction cylinder (61). A swinging component (65) is provided on the frame (1) for driving the rotating shaft (63) to swing back and forth. The swinging of the rotating shaft (63) drives the compaction cylinder (61) to crush the large soil particles inside the drum screen (3).

2. The cement waste screening and recycling device according to claim 1, characterized in that: The swinging component (65) includes a cylinder (651) mounted on the frame (1) and a rack (652) connected to the piston rod of the cylinder (651). One end of the rotating shaft (63) is connected to a gear (631), and the rack (652) meshes with the gear (631).

3. The cement waste screening and recycling device according to claim 2, characterized in that: A limiting wheel (66) is rotatably connected to the frame (1). The limiting wheel (66) abuts against the side of the rack (652) away from the gear (631). The limiting wheel (66) is used to prevent the rack (652) from separating from the gear (631).

4. The cement waste screening and recycling device according to claim 1, characterized in that: A connecting rod (64) is connected between the inner wall of the rolling cylinder (61) and the outer wall of the rotating shaft (63). Multiple connecting rods (64) are spaced apart along the circumference of the rotating shaft (63), and the lengths of the multiple connecting rods (64) are different.

5. The cement waste screening and recycling device according to claim 1, characterized in that: The outer wall of the rolling cylinder (61) is machined with rolling teeth (62).

6. The cement waste screening and recycling device according to claim 1, characterized in that: The driving device (4) includes a rotating drum (41) rotatably connected to the frame (1) and a motor (42) for driving the rotating drum (41) to rotate. A transmission component is provided between the rotating drum (41) and the drum screen (3), and the rotating drum (41) drives the drum screen (3) to rotate through the transmission component.

7. The cement waste screening and recycling device according to claim 6, characterized in that: The transmission component includes a transmission wheel (43) sleeved on the outside of the rotating shaft (63) and a guide rail (32) arranged circumferentially around the outer wall of the drum screen (3). The transmission wheel (43) is partially embedded in the guide rail (32) and abuts against the outer wall of the drum screen (3).

8. The cement waste screening and recycling device according to claim 1, characterized in that: A protective cover (14) is provided on the frame (1), and the protective cover (14) is fitted over the outside of the drum screen (3).

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