Segmented rolling device for ultra-long silt arrester of complex foundation tailing pond

Abstract

The invention relates to the related technical field of tailing pond silt arrester construction equipment, and provides a complex foundation tailing pond super-long silt arrester segmented rolling device which comprises a movable bearing assembly, a segmented rolling assembly arranged on the movable bearing assembly, an adjusting assembly and a quality monitoring assembly. The specification of the device can be flexibly adjusted according to the segment length of the ultra-long silt arrester, the rolling height and angle are adjusted, the device is adaptive to a complex foundation with uneven base surface fluctuation, and accurate rolling is achieved; the lap joint width between every two adjacent rolling rollers is adjusted according to the construction requirement, the number of the corresponding rolling rollers is increased or decreased, the phenomena of pressure leakage, overpressure or boundary ditches are avoided, and the overall compactness of the dam body is improved; a worker can monitor the rolling condition in real time, find rolling defects in time and supplement pressure; on the premise that the weight is not increased, the linear pressure is increased, the rolling times are reduced, and the rolling efficiency is improved; and automatic segmented rolling is achieved, the construction efficiency is greatly improved, and the rapid construction requirement of the ultra-long silt arrester is met.

Description

Technical Field

[0001] This invention relates to the technical field of tailings dam construction equipment, and in particular to a segmented compaction device for ultra-long tailings dams on complex foundations. Background Technology

[0002] Tailings dams are core facilities for storing tailings during mining operations. As a key protective structure within tailings dams, the construction quality of the dam directly determines its safety level. Tailings dams with complex foundations present numerous technical challenges due to geological characteristics such as uneven foundation bearing capacity, the presence of weak interlayers, and significant foundation undulations. Furthermore, the large construction span and dispersed work areas of ultra-long tailings dams (typically exceeding 500m in length) pose significant additional challenges to the compaction construction of these dams.

[0003] Currently, most existing silt-trapping dam compaction devices adopt an integral compaction structure, which is suitable for conventional scenarios with flat foundations and short dam lengths. However, they have significant drawbacks in the construction of ultra-long silt-trapping dams on complex foundations: First, the compaction width of integral compaction equipment is fixed, making it difficult to adapt to the segmented construction requirements of ultra-long dams. Furthermore, when compacting adjacent segments, issues such as incomplete overlap, under-compaction, or over-compaction can easily occur, affecting the overall density of the dam body. Second, the uneven surface of complex foundations prevents existing compaction devices from adjusting the compaction height and angle in real time, resulting in insufficient compaction in low-lying areas and over-compaction in high-lying areas. Third, when constructing ultra-long dams in segments, the compaction progress of each segment is difficult to coordinate. The staggered compaction effect at the joints is poor, and there is a lack of an effective compaction quality monitoring mechanism, making it impossible to detect compaction defects in a timely manner, leading to high rework costs and low efficiency. Summary of the Invention

[0004] The present invention aims to provide a segmented compaction device for ultra-long tailings dams on complex foundations, which can adapt to the characteristics of complex foundations, meet the segmented compaction requirements of ultra-long tailings dams, and adjust the compaction angle to ensure the quality of segmented overlap and compaction uniformity.

[0005] Therefore, the technical solution adopted by the present invention is as follows: a segmented compaction device for ultra-long sand-trapping dams in complex foundation tailings ponds, including a mobile bearing component, a segmented compaction component, an adjustment component and a quality monitoring component set on the mobile bearing component, wherein the mobile bearing component includes a bearing frame, a mounting plate set on the bearing frame, a walking component and a steering component;

[0006] The segmented compaction assembly includes at least three sets of compaction units spaced apart at the front end of the mounting plate, with an overlap adjustment unit between adjacent compaction units for adjusting the overlap width; the adjustment assembly includes a height adjustment assembly and an angle adjustment assembly; the movable bearing assembly is also provided with an auxiliary support assembly and a cleaning assembly; and the quality monitoring assembly includes visual monitoring modules evenly distributed above and at the rear end of the segmented compaction assembly.

[0007] As a preferred embodiment of the above solution, the supporting frame is made of high-strength steel welded together, the walking assembly includes at least four sets of walking wheels set under the supporting frame, and the walking wheels are made of non-slip and wear-resistant rubber tires; the steering assembly adopts a dual-cylinder hydraulic steering structure.

[0008] More preferably, each of the rolling units includes a hollow polygonal rolling roller, a vibrating motor installed inside the rolling roller, and a rolling drive motor connected to the rolling roller. The rolling rollers of multiple rolling units are coaxially arranged, and the rolling rollers of adjacent rolling units are of different sizes. Each rolling roller includes three rolling sections spaced apart and two connecting sections spaced apart between the three rolling sections. The two connecting sections are respectively connected to mounting brackets. Each rolling unit is connected to a mounting plate through two mounting brackets. The vibrating motor is located in the middle rolling section. The rolling roller is made of alloy steel forging and has a regular hexagonal or regular octagonal structure on its outer surface.

[0009] More preferably, the overlap adjustment unit includes two overlap cylinders. The fixed ends of the two overlap cylinders are symmetrically installed on a connecting section of the compaction unit by bolts, and the telescopic ends are connected to the connecting section of another set of compaction units by floating joints. The mounting plate is provided with a moving groove for the mounting bracket to move left and right. The upper end of the mounting bracket is hinged to a moving block provided in the moving groove. The middle part of the load-bearing frame is provided with a movable groove for the mounting bracket to extend downward and swing back and forth.

[0010] More preferably, a rolling drive motor for rotating the rolling roller is provided on another connecting section of the rolling roller. The housing of the rolling drive motor is fixedly connected to the mounting bracket, and the overlapping cylinders of adjacent rolling rollers are connected to both sides of the rolling drive motor and are staggered.

[0011] Further preferably, the height adjustment assembly includes at least four sets of height adjustment cylinders evenly distributed on the support frame. The telescopic ends of the height adjustment cylinders are detachably connected to the mounting plate. Each set of height adjustment cylinders is equipped with a displacement sensor, which is installed parallel to the height adjustment cylinder. The angle adjustment assembly includes an angle adjustment cylinder and a tilt sensor. The two ends of the angle adjustment cylinder are respectively hinged to the support frame and the mounting bracket for adjusting the rotation of the mounting bracket. The tilt sensor is fixedly installed on the mounting bracket.

[0012] More preferably, the visual monitoring module includes a high-definition camera and LED fill lights, with the high-definition camera mounted above the segmented compaction mechanism and the LED fill lights mounted on both sides of the high-definition camera.

[0013] More preferably, the auxiliary support assembly includes at least four support cylinders and four support feet. The support cylinders are evenly installed at the four bottom corners of the support frame. The support feet are fixedly connected to the telescopic ends of the support cylinders by bolts. The bottom of the support feet is provided with anti-slip texture.

[0014] More preferably, the cleaning component includes a cleaning brush fixedly installed above the pressing roller. The cleaning brush is made of high-strength nylon bristles and fits tightly against the surface of the pressing roller. The cleaning brush is fixed above the pressing roller by a mounting bracket and can remove the material adhering to the surface of the pressing roller in real time, avoiding the material adhesion from affecting the pressing effect and reducing the wear of the pressing roller. The diameter of the bristles of the cleaning brush is 0.3-0.5mm.

[0015] The beneficial effects of this invention are: the device specifications can be flexibly adjusted according to the segment length of the ultra-long sand-trapping dam, the rolling height and rolling angle of the rolling roller can be adjusted, it can adapt to complex foundations with uneven base surfaces, achieve precise rolling, eliminate rolling dead angles, and solve the problems of poor adaptability and uneven rolling of existing devices.

[0016] An adjustable overlap adjustment component is provided between adjacent compaction units. The overlap width between two adjacent compaction rollers can be adjusted according to the construction needs, and the number of corresponding compaction rollers can be increased or decreased to avoid leakage, over-compaction or boundary ditch phenomena, improve the overall density of the dam body, and solve the defects of poor overlap in existing segmented compaction.

[0017] A quality monitoring agency is set up to collect various parameters and images of the compaction process in real time. Staff can monitor the compaction situation in real time, detect compaction defects in time, and make up for them.

[0018] The segmented polygonal compaction rollers are used to increase linear pressure without increasing the weight, reduce the number of compaction passes, and improve compaction efficiency; automated segmented compaction is achieved, which greatly improves construction efficiency and meets the rapid construction needs of ultra-long silt-trapping dams. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the rolling roller in this invention.

[0021] Figure 3 This is a schematic diagram of the internal structure of the rolling roller in this invention. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-3As shown, a segmented compaction device for an ultra-long tailings dam with complex foundation includes a mobile bearing component, a segmented compaction component, an adjustment component, and a quality monitoring component installed on the mobile bearing component. The mobile bearing component includes a bearing frame 1, a mounting plate 2 installed on the bearing frame 1, a walking component, and a steering component.

[0024] The load-bearing frame 1 is made of high-strength steel welded together. The running gear includes at least four sets of running wheels 3 set under the load-bearing frame 1. The running wheels 3 are made of non-slip and wear-resistant rubber tires. The steering gear adopts a dual-cylinder hydraulic steering structure.

[0025] The load-bearing frame 1 is welded from Q355 high-strength steel, and its load-bearing capacity is not less than 50t. Each set of walking wheels 3 is equipped with an independent drive motor to achieve independent speed adjustment of a single wheel. The speed adjustment range is 0~8km / h, which facilitates the adjustment of the travel trajectory of the mobile load-bearing components and adapts to the steering and precise positioning requirements of segmented compaction.

[0026] The dual-cylinder hydraulic steering structure is located at the front end of the carrier frame 1 (not shown in the figure), and includes a steering knuckle, a left steering cylinder, a right steering cylinder, and a hinged support. The steering knuckle is located below the front end of the carrier frame 1, with the front wheel mounted on the lower end and the upper end hinged to the carrier frame 1 via a steering pin. The left and right steering cylinders are arranged symmetrically on the left and right sides, and the two steering cylinders are respectively connected to the carrier frame 1 via the hinged support at the front end of the carrier frame 1. The piston rod ends are respectively hinged to the left and right sides of the steering knuckle. The extension and retraction of the left and right steering cylinders drives the steering knuckle to rotate around the pin, thereby realizing the hydraulic steering of the whole machine and ensuring smooth and reliable steering. This is existing technology and will not be described in detail here.

[0027] The segmented compaction assembly includes at least three sets of compaction units spaced apart at the front end of the mounting plate 2. Each compaction unit includes a hollow polygonal compaction roller 4, a vibrating motor installed inside the compaction roller 4, and a compaction drive motor 5 connected to the compaction roller 4. The compaction rollers 4 of the multiple compaction units are coaxially arranged, and the size of the compaction rollers 4 of two adjacent compaction units is different. The compaction roller 4 includes three compaction sections 401 spaced apart and two connecting sections 402 spaced apart between the three compaction sections 401. The two connecting sections 402 are respectively connected to mounting brackets 6. Each compaction unit is connected to the mounting plate 2 through two mounting brackets 6. The vibrating motor is located in the compaction section 401 in the middle position. The compaction roller 4 is made of alloy steel forging, and the outer surface has a regular hexagonal or regular octagonal structure.

[0028] The vibratory motor is installed in the mounting cavity inside the compaction roller 4 (not shown in the figure). It includes the vibratory motor and two sets of eccentric blocks. The output end of the vibratory motor is fixedly connected to the eccentric blocks through a coupling. The adjustable vibration frequency range is 20Hz~30Hz, and the amplitude adjustment range is 0~5mm, which can adapt to the compaction requirements under different foundation conditions. The vibratory motor is installed inside the compaction roller 4, and its power supply line is connected through a conductive slip ring. The conductive slip ring is fitted on the end of the shaft of the compaction roller 4. The inner ring of the slip ring rotates synchronously with the shaft and is connected to the wiring of the vibratory motor. The outer ring of the slip ring is fixed on the mounting bracket 6 and connected to an external power supply. The rotational power supply is realized through the conductive slip ring to avoid the vibratory motor line from being entangled and damaged during the rotation of the compaction roller 4.

[0029] A rolling drive motor 5 for rotating the rolling roller 4 is installed on another connecting section 402 of the rolling roller 4. The housing of the rolling drive motor 5 is fixedly connected to the mounting bracket 6, and the overlapping cylinders 7 of adjacent rolling rollers 4 are connected to both sides of the rolling drive motor 5 and staggered. The wiring of the rolling drive motor 5 is fixed on the mounting bracket 6 and connected to the power supply.

[0030] An overlap adjustment unit is provided between adjacent compaction units to adjust the overlap width. The overlap adjustment unit includes two overlap cylinders 7. The fixed ends of the two overlap cylinders 7 are symmetrically installed on a connecting section 402 of the compaction unit by bolts, and the telescopic ends are connected to the connecting section 402 of another set of compaction units by floating joints. The mounting plate 2 is provided with a moving groove (not shown in the figure) for the mounting bracket 6 to move left and right. The upper end of the mounting bracket 6 is hinged to the moving block 8 set in the moving groove. The middle part of the supporting frame 1 is provided with a movable groove 9 for the mounting bracket 6 to extend downward and swing back and forth. The moving groove is a "T" shaped groove that matches the shape of the moving block 8, and one end of the moving groove is provided with an opening for increasing or decreasing the number of moving blocks 8.

[0031] The adjustment assembly includes a height adjustment assembly and an angle adjustment assembly. The height adjustment assembly includes at least four sets of height adjustment cylinders 10 evenly distributed on the support frame 1. The telescopic ends of the height adjustment cylinders 10 are detachably connected to the mounting plate 2. Each set of height adjustment cylinders 10 is equipped with a displacement sensor, which is installed parallel to the height adjustment cylinder 10 to ensure that the mounting plate 2 is in a horizontal state. The angle adjustment assembly includes an angle adjustment cylinder 11 and a tilt sensor. The two ends of the angle adjustment cylinder 11 are respectively hinged to the support frame 1 and the mounting bracket 6 to adjust the rotation of the mounting bracket 6. The tilt sensor is fixedly installed on the mounting bracket 6 to monitor the rotation angle of the mounting bracket 6.

[0032] The height adjustment component can adjust the height of the compaction roller 4 within the range of 0~50cm, and the angle adjustment component can adjust the swing amplitude of the compaction roller 4 within the range of 0°~15°. The two work together to adjust the compaction height and compaction angle of the compaction roller 4 in real time, accurately adapting to the geological characteristics of complex foundation surfaces with uneven undulations and weak interlayers. At the same time, the compaction posture near the bank slope and at the corners of the structure can be adjusted in a targeted manner.

[0033] The mobile support assembly is also equipped with auxiliary support components and cleaning components. The auxiliary support components include at least four support cylinders 12 and four support feet 13. The support cylinders 12 are evenly installed at the four bottom corners of the support frame 1. The support feet 13 are fixedly connected to the telescopic ends of the support cylinders 12 by bolts, and the bottom of the support feet 13 is provided with anti-slip texture. When the device stops working or is being repaired, the support cylinders 12 are extended to make the support feet 13 in close contact with the ground, providing stable support for the device and preventing it from sliding.

[0034] The cleaning component includes a cleaning brush 14 fixedly installed above the roller 4. The cleaning brush 14 is made of high-strength nylon bristles and fits tightly against the surface of the roller 4. The cleaning brush 14 is fixed above the roller 4 by a mounting bracket 6. It can remove the material adhering to the surface of the roller 4 in real time, avoid the material adhesion from affecting the crushing effect, and reduce the wear of the roller 4. The diameter of the bristles of the cleaning brush 14 is 0.3-0.5mm.

[0035] The quality monitoring components include visual monitoring modules that are evenly distributed above and behind the segmented compaction components.

[0036] The visual monitoring module includes a high-definition camera and LED supplementary lights (not shown in the figure). The high-definition camera is installed above the segmented compaction mechanism, and the LED supplementary lights are installed on both sides of the high-definition camera.

[0037] It employs a high-definition camera, model IPC-8231 or IPC-8232, with a resolution of 1080P and a shooting frame rate of 25-30fps. Installed above the segmented compaction mechanism, it can capture real-time images of the compaction surface, clearly capturing compaction defects such as under-compaction, over-compaction, and loose overlap. The LED supplementary lights, with a power of 40-50W, are installed on both sides of the high-definition camera, with a supplementary lighting range of 5-10m, used for supplementary lighting in low-light environments to ensure image clarity. It can realize real-time monitoring of compaction quality, abnormal early warning, and data traceability, facilitating subsequent quality verification and parameter optimization.

[0038] The device specifications can be flexibly adjusted according to the segment length of the ultra-long silt-trapping dam, adjusting the compaction height and angle of the roller 4 to adapt to complex foundations with uneven surfaces, achieving precise compaction, eliminating compaction dead angles, and solving the problems of poor adaptability and uneven compaction of existing devices. Adjustable overlap adjustment components are provided between adjacent compaction units, allowing adjustment of the overlap width between two adjacent rollers 4 according to construction needs, and increasing or decreasing the number of rollers 4 accordingly, avoiding missed compaction, over-compaction, or boundary gullies, improving the overall density of the dam body, and solving the defect of loose overlap in existing segmented compaction. A quality monitoring mechanism is set up to collect various parameters and compaction images in real time during the compaction process, allowing staff to monitor the compaction situation in real time, promptly identify compaction defects, and perform supplementary compaction. The use of segmented polygonal rollers 4 increases linear pressure without increasing weight, reducing the number of compaction passes and improving compaction efficiency. Automated segmented compaction is achieved, significantly improving construction efficiency and adapting to the rapid construction needs of ultra-long silt-trapping dams.

[0039] In this embodiment, a PLC programmable controller of model S7-300 or S7-400 is used. The controller is connected to a touch screen and a wireless communication module. The controller is distributed and electrically connected to the drive motor and steering cylinder of the walking wheel 3 in the mobile bearing component, the vibration motor, the compaction drive motor 5, and the connecting cylinder 7 of the segmented compaction component, the height adjustment cylinder 10 and the angle adjustment cylinder 11 of the adjustment component, and the high-definition camera and LED supplementary light of the quality monitoring component. It is used to receive various signals and send control commands to realize the automated operation of the device. The touch screen is 15-17 inches in size with a resolution of 1920×1080 and uses an electric... The resistive touchscreen has a response time of ≤0.3s and is used to preset the number of compaction passes, compaction standards, overlap width, and vibration frequency range. It can also display compaction parameters, equipment operation status, quality inspection results, and abnormal warning information in real time, facilitating operation by staff. The wireless communication module uses a 4G-730 or 5G-730 communication module, which supports full network compatibility and unlimited communication distance. It can realize wireless connection between the central control system and remote terminals (such as mobile phones and computers). Staff can monitor the equipment operation status and compaction quality in real time through remote terminals, and can also remotely send control commands to achieve remote operation. This is existing technology and will not be described in detail here.

[0040] In this embodiment, the vibration frequency of the vibratory motor is adjustable from 20Hz to 30Hz, with the range being 20Hz to 25Hz in the weak interlayer area and 25Hz to 30Hz in the hard foundation area; the compaction speed is adjustable from 2 to 8km / h, with the range being 2 to 4km / h in the weak interlayer area and 4 to 8km / h in the hard foundation area; the compaction angle is adjustable from 0° to 15°, which can be flexibly adjusted according to the slope of the dam body and the undulation of the base surface; the number of compaction passes is adjustable from 3 to 6, with 5 to 6 passes in the weak interlayer area and 3 to 4 passes in the hard foundation area, and the number of compaction passes can be automatically adjusted according to the compaction degree test results.

[0041] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A segmented compaction device for ultra-long sand-trapping dams in complex foundation tailings ponds, characterized in that: It includes a mobile load-bearing component, a segmented compaction component, an adjustment component, and a quality monitoring component mounted on the mobile load-bearing component. The mobile load-bearing component includes a load-bearing frame (1), a mounting plate (2) mounted on the load-bearing frame (1), a walking component, and a steering component. The segmented compaction assembly includes at least three sets of compaction units spaced apart at the front end of the mounting plate (2), and an overlap adjustment unit for adjusting the overlap width is provided between adjacent compaction units; the adjustment assembly includes a height adjustment assembly and an angle adjustment assembly; the movable bearing assembly is also provided with an auxiliary support assembly and a cleaning assembly, and the quality monitoring assembly includes a visual monitoring module evenly distributed above and behind the segmented compaction assembly.

2. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 1, characterized in that: The supporting frame (1) is made of high-strength steel welded together. The walking assembly includes at least four sets of walking wheels (3) set under the supporting frame (1). The walking wheels (3) are made of non-slip and wear-resistant rubber tires. The steering assembly adopts a dual-cylinder hydraulic steering structure.

3. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 1, characterized in that: Each of the rolling units includes a hollow polygonal rolling roller (4), a vibrating motor installed inside the rolling roller (4), and a rolling drive motor (5) connected to the rolling roller (4). The rolling rollers (4) of multiple rolling units are coaxially arranged, and the rolling rollers (4) of two adjacent rolling units are different in size. The rolling roller (4) includes three rolling sections (401) spaced apart and two connecting sections (402) spaced apart between the three rolling sections (401). The two connecting sections (402) are respectively connected to mounting brackets (6). Each rolling unit is connected to the mounting plate (2) through two mounting brackets (6). The vibrating motor is located in the middle rolling section (401). The rolling roller (4) is made of alloy steel forging and has a regular hexagonal or regular octagonal structure on its outer surface.

4. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 3, characterized in that: The overlap adjustment unit includes two overlap cylinders (7). The fixed ends of the two overlap cylinders (7) are symmetrically installed on a connecting section (402) of the rolling unit by bolts. The telescopic ends are connected to the connecting section (402) of another rolling unit by a floating joint. The mounting plate (2) is provided with a moving groove for the mounting bracket (6) to move left and right. The upper end of the mounting bracket (6) is hinged to the moving block (8) set in the moving groove. The middle part of the bearing frame (1) is provided with a movable groove (9) for the mounting bracket (6) to extend downward and swing back and forth.

5. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 4, characterized in that: A rolling drive motor (5) for rotating the rolling roller (4) is provided on another connecting section (402) of the rolling roller (4). The housing of the rolling drive motor (5) is fixedly connected to the mounting bracket (6), and the overlapping cylinders (7) of the adjacent rolling rollers (4) are connected to both sides of the rolling drive motor (5) and staggered.

6. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 1, characterized in that: The height adjustment assembly includes at least four sets of height adjustment cylinders (10) evenly distributed on the support frame (1). The telescopic ends of the height adjustment cylinders (10) are detachably connected to the mounting plate (2). Each set of height adjustment cylinders (10) is equipped with a displacement sensor, which is installed parallel to the height adjustment cylinder (10). The angle adjustment assembly includes an angle adjustment cylinder (11) and a tilt sensor. The two ends of the angle adjustment cylinder (11) are respectively hinged to the support frame (1) and the mounting bracket (6) for adjusting the rotation of the mounting bracket (6). The tilt sensor is fixedly installed on the mounting bracket (6).

7. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 1, characterized in that: The visual monitoring module includes a high-definition camera and LED fill lights. The high-definition camera is installed above the segmented compaction mechanism, and the LED fill lights are installed on both sides of the high-definition camera.

8. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 1, characterized in that: The auxiliary support assembly includes at least four support cylinders (12) and four support feet (13). The support cylinders (12) are evenly installed at the four corners of the bottom of the support frame (1). The support feet (13) are fixedly connected to the telescopic ends of the support cylinders (12) by bolts. The bottom of the support feet (13) is provided with anti-slip texture.

9. The segmented compaction device for ultra-long tailings dams on complex foundations according to claim 1, characterized in that: The cleaning component includes a cleaning brush (14) fixedly installed above the rolling roller (4). The cleaning brush (14) is made of high-strength nylon bristles and fits tightly against the surface of the rolling roller (4). The cleaning brush (14) is fixed above the rolling roller (4) by a mounting bracket (6) and can remove the material adhering to the surface of the rolling roller (4) in real time, so as to avoid the material adhering and affecting the rolling effect, and at the same time reduce the wear of the rolling roller (4). The diameter of the bristles of the cleaning brush (14) is 0.3-0.5mm.

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