A mobile tunnel wall cleaning device

Abstract

This utility model discloses a mobile tunnel wall cleaning device, mounted on the working platform of a tunnel cleaning vehicle. It includes: a guide rail, a translation support, a linear drive assembly, a cleaning brush assembly, and a movable support arm. The guide rail is located on the horizontal surface of the working platform and extends in a direction perpendicular to the travel of the tunnel cleaning vehicle. The linear drive assembly drives the translation support to reciprocate along the direction of the guide rail. The movable support arm and the cleaning brush assembly are hinged, allowing the cleaning brush assembly to shift position at least vertically. The translation support and the movable support arm are hinged, allowing the movable support arm to move horizontally. This design solves the problem of existing cleaning devices being suspended during operation, leading to poor stability. It effectively reduces vibration and displacement during operation, improving the stability and reliability of the device during operation and movement.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and more specifically, to a mobile tunnel wall cleaning device. Background Technology

[0002] As a crucial component of transportation infrastructure, the regular cleaning of tunnel walls during operation and maintenance is of great significance for ensuring driving safety and improving the traffic environment. Currently, the cleaning equipment installed on tunnel cleaning vehicles makes it inconvenient to adjust the distance between the cleaning brush and the tunnel wall, affecting the cleaning effect and potentially causing brush wear or wall damage. Furthermore, achieving an ideal cleaning trajectory requires drivers with a high level of driving skill, increasing the complexity and safety risks of the operation.

[0003] Patent publication number CN117005346A discloses a highway tunnel cleaning vehicle device. By incorporating a lateral movement component, the robotic arm can move laterally, allowing it to approach or move away from the tunnel wall. This adjusts the distance between the cleaning nozzle and the tunnel wall, overcoming the aforementioned problems. However, in this type of prior art, the lateral movement component is placed on the side wall of the tunnel vehicle, leaving the cleaning device suspended in mid-air. This results in poor overall structural stability, making it prone to shaking or damage during operation, affecting the cleaning effect and the equipment's lifespan.

[0004] Therefore, how to improve the operational stability of mobile tunnel wall cleaning devices and extend their service life is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a mobile tunnel wall cleaning device to solve the problem that the existing cleaning device is suspended in the air during operation, resulting in poor stability during operation, and to improve the stability and reliability of the device during operation and movement.

[0006] To achieve the above objectives, this utility model provides a mobile tunnel wall cleaning device, mounted on the working platform of a tunnel cleaning vehicle, comprising: a guide rail, a translation bracket, a linear drive assembly, a cleaning brush assembly, and a movable support arm. The guide rail is disposed on the horizontal surface of the working platform and extends in a direction perpendicular to the travel of the tunnel cleaning vehicle. The linear drive assembly drives the translation bracket to reciprocate along the direction of the guide rail. The movable support arm is hinged to the cleaning brush assembly, allowing the cleaning brush assembly to shift position at least in the height direction. The translation bracket is hinged to the movable support arm, allowing the movable support arm to move positionally in the horizontal direction.

[0007] The guide rail is set perpendicular to the direction of travel of the tunnel cleaning vehicle, which enables the lateral movement of the translation support. The guide rail is fixedly installed on the horizontal plane at the top of the work platform. The translation support drives the cleaning brush assembly and the movable support arm to move left and right on the work platform. The weight of the cleaning brush assembly and the movable support arm is transferred to the work platform by the guide rail structure, which effectively reduces the vibration and offset during the operation of the device, makes the contact between the cleaning brush assembly and the wall more stable, improves the smoothness of the device's operation and the cleaning effect, extends the service life of the device, and at the same time improves the safety and reliability of the operation.

[0008] Preferably, the linear drive assembly includes a first telescopic cylinder and a fixed support. The fixed support is fixedly mounted on the working platform. One end of the first telescopic cylinder is fixedly connected to the fixed support, and the other end is fixedly connected to the translational support. The translational support is driven to move horizontally closer to or further away from the tunnel wall by the extension / retraction movement of the telescopic rod of the first telescopic cylinder. The cleaning brush assembly includes a bracket, a spray pipe, and a brush. The spray pipe is fixedly mounted on the bracket for spraying cleaning fluid, and the brush is rotatably mounted on the bracket for contacting and rolling to clean the tunnel wall.

[0009] The linear motion of the cleaning brush assembly, achieved through the cooperation of the first telescopic hydraulic cylinder and the translational bracket, allows for horizontal movement of the brush assembly towards or away from the tunnel wall. The hydraulic cylinder provides significant thrust and load capacity, enabling smooth, precise, and rapid adjustment of the brush assembly's position based on the actual distance from the tunnel wall. Furthermore, the hydraulic cylinder-driven linear drive assembly offers advantages such as high impact resistance, long service life, and low maintenance costs. The cleaning brush assembly integrates a spray nozzle and a rotatable brush structure to perform the tasks of spraying cleaning fluid and scrubbing the wall. The linear drive assembly ensures that the brush maintains a suitable contact distance with the wall, improving cleaning effectiveness and thus significantly enhancing the overall operational performance and practicality of the tunnel wall cleaning device.

[0010] Preferably, the translation support is provided with a composite roller bearing, which is located on both sides of the translation support and rolls within the guide rail.

[0011] The translation support utilizes the low rolling friction resistance within the guide rail to reduce noise and wear, extending the device's lifespan. Therefore, a roller structure is incorporated into the translation support. During operation, the translation support is subjected to the downward force of gravity from the cleaning brush assembly and movable support arm. Simultaneously, when the brush contacts the tunnel wall for cleaning, it also bears lateral forces from the direction of travel of the tunnel cleaning vehicle. The composite roller bearing structure can simultaneously withstand the radial and axial loads generated by the translation support, ensuring uniform force distribution and precise guidance during operation within the guide rail. This effectively prevents problems such as support swaying and misalignment, significantly improving the overall stability and structural reliability of the machine.

[0012] Preferably, there are two guide rails, and the fixed support is located between the two guide rails. Both guide rails are groove-shaped structures with their grooves facing each other. The diameter of the composite roller bearing is adapted to the groove width of the guide rail.

[0013] Because the brush makes rolling contact with the tunnel wall, the composite roller bearing bears lateral loads from the direction of travel of the tunnel cleaning vehicle during operation. By setting up two grooved guide rail structures with opposing slots, the radial rollers of the composite roller bearing contact the upper and lower surfaces of the guide rail grooves respectively, while the axial rollers make close contact with the sidewalls of the guide rail grooves. This ensures smooth and stable movement of the translational support within the guide rails, effectively preventing shaking and jamming during operation, and significantly improving the operational reliability and service life of the cleaning device. The fixed support, the first telescopic cylinder, and the translational support are positioned between the two guide rails. Under the constraint and guidance of the guide rails, the movement direction of the translational support can be effectively restricted and precisely guided, thereby enhancing the guiding stability and anti-skewness capability of the device during movement.

[0014] Preferably, it includes a slewing mechanism rotatably mounted on the translation bracket, the slewing mechanism being used to adjust the movable support arm to rotate between predetermined angular positions, the predetermined angular positions including at least 0° and 180° positions.

[0015] The rotating mechanism allows the cleaning device to clean both sides of the tunnel without changing the direction of travel of the tunnel cleaning vehicle, significantly improving the flexibility and ease of use of the cleaning operation. When the rotating mechanism is at 0°, the brush faces one side of the tunnel wall; when the rotating mechanism rotates to 180°, the brush turns to the other side of the tunnel wall, thus meeting the cleaning needs under different operating directions.

[0016] Preferably, the slewing mechanism includes a slewing frame and a slewing shaft. The translation support is provided with a side plate. The slewing frame is rotatably connected to the side plate through the slewing shaft. The two sides of the slewing frame are respectively provided with lugs along the direction of travel of the tunnel cleaning vehicle. The lugs are provided with a first positioning hole, and the side plate is provided with a second positioning hole.

[0017] Positioning holes on the lugs and side plates facilitate quick alignment and locking using positioning pins and other positioning components, preventing angular displacement of the rotating frame during operation and ensuring its stability in working condition. When the rotating frame rotates to the 0° position, the positioning hole on one lug coincides with the positioning hole on the side plate; when the rotating frame rotates to the 180° position, the positioning hole on the other lug coincides with the positioning hole on the side plate. This allows the rotating frame to be rotatably set relative to the translation support within the range of 0° to 180°, and the distance between the brush and the wall can be adjusted by the lateral movement of the translation support. This enables rapid reversal cleaning of the left and right walls of the tunnel without rotating the vehicle body, improving cleaning efficiency and operational flexibility.

[0018] The cleaning brush assembly is provided in two parts, which are staggered in height along the height direction. Each of the two cleaning brush assemblies is provided with a pivot swing mechanism for adjusting the swing angle of the brush. The pivot swing mechanism is hinged to the bracket.

[0019] Two staggered cleaning brush assemblies along the vertical direction can cover a larger wall area in the same operation, effectively increasing the cleaning area per unit time and significantly improving cleaning efficiency. The pivot mechanism allows for individual adjustment of the swing angle of each cleaning brush assembly, enabling the brushes to better conform to the curved wall surface of the tunnel, achieving more thorough contact and cleaning, thereby improving the cleaning effect.

[0020] Preferably, the pivot swing mechanism includes a pivot frame and a second telescopic cylinder. One end of the pivot frame is fixedly connected to the bracket, and the other end is hinged to the movable support arm to form a swing fulcrum. One end of the second telescopic cylinder is fixed to the movable support arm, and the other end is hinged to the pivot frame. Through the extension / retraction movement of the telescopic rod of the second telescopic cylinder, the pivot frame is driven to swing clockwise or counterclockwise around the swing fulcrum.

[0021] The extension and retraction motion of the hydraulic cylinder drives the pivot frame to swing clockwise or counterclockwise around the swing fulcrum, allowing the brush to flexibly adjust the swing angle according to the curvature of the wall during the cleaning process. This improves the device's adaptability to complex tunnel walls and enhances the cleaning quality. Furthermore, the hydraulic cylinder drive structure is simple, reliable, durable, and has good practical value. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0023] Figure 1A schematic diagram of the mobile tunnel wall cleaning device provided by this utility model installed on a tunnel cleaning vehicle; Figure 2 This is a structural diagram of the mobile tunnel wall cleaning device provided by this utility model; Figure 3 This is a structural diagram of the rotary mechanism and pivot swing mechanism provided by this utility model.

[0024] in: 1-Working platform, 2-Guide rail, 21-Side, 22-Top, 23-Bottom, 3-Transfer bracket, 31-Composite roller bearing, 32-Side plate, 321-Second positioning hole, 4-Linear drive assembly, 41-First telescopic cylinder, 42-Fixed support, 5-Cleaning brush assembly, 51-Bracket, 52-Spray nozzle, 53-Brush, 54-Pivot swing mechanism, 541-Pivot frame, 542-Second telescopic cylinder, 6-Moving arm, 61-First arm, 62-Second arm, 63-Third telescopic cylinder, 64-Fourth telescopic cylinder, 7-Rotation mechanism, 71-Rotation frame, 711-Lug, 712-First positioning hole, 72-Rotation shaft. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Please refer to the instruction manual attached. Figure 1 To be continued Figure 3 This document describes an embodiment of the mobile tunnel wall cleaning device of the present invention. (See also...) Figure 1The cleaning system, mounted on the working platform 1 of the tunnel cleaning vehicle, includes: a guide rail 2, a translation bracket 3, a linear drive assembly 4, a cleaning brush assembly 5, and a movable support arm 6. The linear drive assembly 4 drives the translation bracket 3 to move along the guide rail 2, which is positioned on the horizontal plane of the working platform 1 and extends perpendicular to the direction of travel of the tunnel cleaning vehicle, enabling the translation bracket 3 to reciprocate laterally on the working platform. The movable support arm 6 is hinged to the top of the translation bracket 3, and the cleaning brush assembly 5 is mounted on the free end of the movable support arm 6. The movement of the translation bracket 3 drives the movable support arm 6 and its cleaning brush assembly 5 to achieve overall lateral position adjustment, allowing the cleaning brush assembly 5 to move closer to or further away from the tunnel wall to meet the cleaning needs of different wall locations. The guide rail 2 is mounted on the horizontal surface of the working platform 1. The weight of the cleaning brush assembly 5 and the movable support arm 6 is transferred to the working platform 1 via the guide rail 1 and the translation bracket 3 structure. This effectively reduces vibration and offset during device operation, making the contact between the cleaning brush assembly 5 and the wall surface more stable, improving the smoothness of device operation and cleaning effect, extending the service life of the device, and enhancing the safety and reliability of operation. (See also...) Figure 2 The movable support arm 6 includes a first support arm 61 and a second support arm 62. One end of the second support arm 62 is hinged to the first support arm 61, and the other end of the second support arm 62 is hinged to the cleaning brush assembly 5. The two ends of the first support arm 61 are respectively hinged to a third telescopic cylinder 63 and a fourth telescopic cylinder 64, which are used to make the cleaning brush assembly 5 offset at least in the height direction.

[0028] See Figure 2 The linear drive assembly 4 includes a first telescopic cylinder 41 and a fixed support 42. The fixed support 42 is installed on the working platform 1. One end of the first telescopic cylinder 41 is fixedly connected to the fixed support 42, and the other end is connected to the translation bracket 3. Through the telescopic movement of the first telescopic cylinder 41, the translation bracket 3 is driven horizontally, thereby driving the cleaning brush assembly 5 and the movable support arm 6 to move horizontally towards or away from the tunnel wall, completing their linear movement. The linear drive assembly 4 uses a cylinder drive method, which has advantages such as fast response speed, high control precision, and smooth operation. It can quickly and accurately adjust the position of the cleaning brush assembly according to the actual distance to the tunnel wall. In addition, this drive method has strong load capacity and impact resistance, long service life, simple maintenance, and good economic efficiency. The cleaning brush assembly 5 includes a bracket 51, a spray pipe 52, and a brush 53. The nozzle 52 is fixedly mounted on the bracket 51 and is used to spray cleaning fluid to soften or remove stains from the wall surface; the brush 53 is rotatably mounted on the bracket 51 and is used to contact the tunnel wall surface for rolling cleaning. During the cleaning process, the linear drive assembly 4 ensures that the brush 53 always maintains an appropriate contact distance with the tunnel wall surface, thereby improving cleaning efficiency. This structural design improves the operational performance of tunnel wall cleaning.

[0029] To reduce motion resistance, noise, and wear, and extend the service life of the device, the translation support 3 can utilize rolling friction when moving within the guide rail 2. Specifically, roller structures are installed on both sides of the translation support 3 to enable smooth rolling within the guide rail 2, thereby effectively reducing running resistance and improving transmission efficiency and structural durability. Since the translation support 3 is subjected to the gravity of the cleaning brush assembly 5 and the movable support arm 6 during operation, and also bears lateral forces from the direction of travel of the tunnel cleaning vehicle when the brush 53 contacts the tunnel wall for cleaning, a composite roller bearing structure is preferred for the roller structure. This structure can simultaneously withstand the radial and axial loads generated by the translation support 3, ensuring uniform force distribution and precise guidance during operation within the guide rail 2. This effectively avoids support swaying or offset caused by uneven force distribution, thus significantly improving the overall stability and structural reliability of the machine.

[0030] Two guide rails 2 are located on either side of the translation bracket 3 to facilitate the smooth operation of the translation bracket 3. The guide rail 2 has a groove-shaped structure with a rectangular cross-section. Specifically, it includes a top surface 22 and a bottom surface 23 arranged parallel to each other, and a side surface 21 connecting the two surfaces. The bottom surface 23 of the guide rail 2 is fixedly mounted on the work platform 1. The side surfaces 21 of the two guide rails 2 are opposite and parallel, forming a guide channel within which the composite roller bearing 31 rolls. The composite roller bearing 31 includes radial rollers and axial rollers. The radial rollers contact the upper and lower surfaces of the guide rail groove, respectively, thus matching the outer diameter of the composite roller bearing 31 to the groove width of the guide rail 2. The axial rollers are in close contact with the side surfaces 21 of the guide rail 2, ensuring that the translation bracket 3 can move smoothly and steadily within the guide rail 2 when subjected to lateral forces, effectively preventing shaking and jamming during operation, thereby significantly improving the operational reliability and service life of the cleaning device. The fixed support 42, the first telescopic cylinder 41, and the translation bracket 3 are set between the two guide rails 2. Under the constraint and guidance of the guide rails 2, the movement direction of the translation bracket 3 can be effectively restricted and accurately guided, thereby enhancing the guiding stability and anti-skewness capability of the device during movement.

[0031] The mobile tunnel wall cleaning device includes a rotating mechanism 7, which is rotatably mounted on a translational support 3. The rotation of the rotating mechanism 7 allows the movable support arm 6 to rotate between predetermined angle positions, enabling cleaning of the left and right tunnel walls without changing the direction of travel of the tunnel cleaning vehicle, significantly improving the flexibility and ease of use of the cleaning operation. The predetermined angle positions include at least 0° and 180°. When the rotating mechanism 7 is at the 0° position, the brush 53 faces one side of the tunnel wall; when the rotating mechanism 7 rotates to the 180° position, the brush 53 turns towards the other side of the tunnel wall, thus meeting the cleaning needs under different operating directions. Of course, the predetermined angle positions can be set to various values ​​according to actual needs, and this document does not impose any limitations.

[0032] See Figure 3 The rotary mechanism 7 includes a rotary frame 71 and a rotary shaft 72. A side plate 32 is provided on the translation support 3, and a lug 711 is provided on the rotary frame 71. The lug 711 has a first positioning hole 712, and the side plate 32 has a second positioning hole 321. The rotary frame 71 is rotatably connected to the side plate 32 via the rotary shaft 72. The structure is simple, the connection is stable, and it facilitates quick assembly and disassembly, which is beneficial for subsequent maintenance and replacement, improving the ease of use and reliability of the device. The rotating frame 71 has lugs 711 on both sides along the direction of travel of the tunnel cleaning vehicle. When the rotating frame 71 is at 0°, the first positioning hole 712 on one lug 711 corresponds to the second positioning hole 321 on the side plate 32. When the rotating frame 71 rotates to 180°, the first positioning hole 712 on the other lug 711 corresponds to the second positioning hole 321 on the side plate 32. This facilitates quick alignment and locking of the rotating frame 71 and the side plate 32 using positioning components such as positioning pins, preventing angular displacement of the rotating frame 71 during operation and ensuring its stability in working condition. Furthermore, multiple second positioning holes 321 on the side plate 32 can be provided according to actual needs to achieve precise positioning and locking of the rotating frame 71 at multiple angular positions, enhancing the adaptability and operational flexibility of the device.

[0033] See Figure 3 Two cleaning brush assemblies 5 are provided, arranged at different heights along the vertical direction. This allows the cleaning brush assemblies 5 to cover a larger wall area in the same operation, effectively increasing the cleaning area per unit time and significantly improving cleaning efficiency. Each of the two cleaning brush assemblies 5 is equipped with a pivot swing mechanism 54. The pivot swing mechanism 54 is hinged to the bracket 51, adjusting the swing angle of the brush 53 so that the brush 53 can better conform to the curved wall surface of the tunnel, achieving more thorough contact and cleaning, thereby improving the cleaning effect.

[0034] Furthermore, one embodiment of the pivot swing mechanism 54 includes a pivot frame 541 and a second telescopic cylinder 542. One end of the pivot frame 541 is fixedly connected to the support 51, and the other end is hinged to the movable support arm 6 to form a swing fulcrum. One end of the second telescopic cylinder 542 is fixed to the movable support arm 6, and the other end is hinged to the pivot frame 541. Through the extension or retraction of the telescopic rod of the second telescopic cylinder 542, the pivot frame 541 is driven to swing clockwise or counterclockwise around the swing fulcrum. During the cleaning process, the swing angle of the brush 53 can be adjusted according to the curvature of the tunnel wall, thereby improving the device's adaptability to complex curved surface structures and the cleaning effect. Preferably, the second telescopic cylinder 542 is used as the driving element. Its structural design is simple, the driving method is stable and reliable, it has strong durability, and it has low manufacturing cost, convenient maintenance, and good economic efficiency.

[0035] It should be noted that in this specification, relational terms such as "first" and "second" are used only to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. The orientations or positional relationships indicated by terms such as "up," "down," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0036] The wall cleaning device and tunnel cleaning vehicle provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A mobile tunnel wall cleaning device, mounted on the working platform (1) of a tunnel cleaning vehicle, characterized in that, include: The system includes a guide rail (2), a translation bracket (3), a linear drive assembly (4), a cleaning brush assembly (5), and a movable support arm (6). The guide rail (2) is located on the horizontal surface of the work platform (1) and extends in a direction perpendicular to the travel of the tunnel cleaning vehicle. The linear drive assembly (4) is used to drive the translation bracket (3) to reciprocate along the direction set by the guide rail (2). The movable support arm (6) and the cleaning brush assembly (5) are hinged together to allow the cleaning brush assembly (5) to shift at least in the height direction. The translation bracket (3) and the movable support arm (6) are hinged together to allow the movable support arm (6) to move in the horizontal direction.

2. The mobile tunnel wall cleaning device according to claim 1, characterized in that, The linear drive assembly (4) includes a first telescopic cylinder (41) and a fixed support (42). The fixed support (42) is fixedly mounted on the working platform (1). One end of the first telescopic cylinder (41) is fixedly connected to the fixed support (42), and the other end is fixedly connected to the translation bracket (3). Through the extension / retraction movement of the telescopic rod of the first telescopic cylinder (41), the translation bracket (3) is driven to move closer to or further away from the tunnel wall in the horizontal direction. The cleaning brush assembly (5) includes a bracket (51), a nozzle (52) and a brush (53). The nozzle (52) is fixedly mounted on the bracket (51) for spraying cleaning fluid, and the brush (53) is rotatably mounted on the bracket (51) for contacting and rolling to clean the tunnel wall.

3. The mobile tunnel wall cleaning device according to claim 2, characterized in that, The translation bracket (3) is provided with a composite roller bearing (31), which is located on both sides of the translation bracket (3) and rolls within the guide rail (2).

4. The mobile tunnel wall cleaning device according to claim 3, characterized in that, There are two guide rails (2), both of which are groove-shaped structures and the grooves are arranged opposite to each other. The fixed support (42) is located between the two guide rails (2), and the diameter of the composite roller bearing (31) is adapted to the groove width of the guide rail (2).

5. The mobile tunnel wall cleaning device according to any one of claims 1-4, characterized in that, Includes a slewing mechanism (7), which is rotatably mounted on the translation support (3). The slewing mechanism (7) is used to adjust the movable support arm (6) to rotate between predetermined angle positions, which include at least 0° and 180° positions.

6. The mobile tunnel wall cleaning device according to claim 5, characterized in that, The rotary mechanism (7) includes a rotary frame (71) and a rotary shaft (72). The translation support (3) is provided with a side plate (32). The rotary frame (71) is rotatably connected to the side plate (32) through the rotary shaft (72). The rotary frame (71) is provided with lugs (711) on both sides along the direction of travel of the tunnel cleaning vehicle. The lugs (711) are provided with a first positioning hole (712). The side plate (32) is provided with a second positioning hole (321).

7. The mobile tunnel wall cleaning device according to claim 2, characterized in that, Two cleaning brush assemblies (5) are provided and are arranged at different heights along the height direction. The two cleaning brush assemblies (5) are respectively provided with a pivot swing mechanism (54) for adjusting the swing angle of the brush (53). The pivot swing mechanism (54) and the bracket (51) are hinged.

8. The mobile tunnel wall cleaning device according to claim 7, characterized in that, The pivot swing mechanism (54) includes a pivot frame (541) and a second telescopic cylinder (542). One end of the pivot frame (541) is fixedly connected to the bracket (51), and the other end is hinged to the movable support arm (6) to form a swing fulcrum. One end of the second telescopic cylinder (542) is fixed on the movable support arm (6), and the other end is hinged to the pivot frame (541). Through the extension / retraction movement of the telescopic rod of the second telescopic cylinder (542), the pivot frame (541) is driven to swing clockwise or counterclockwise around the swing fulcrum.

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