Tunnel maintenance engineering vehicle

Abstract

The embodiment of the present application provides a tunnel maintenance engineering vehicle, including: a vehicle frame and a first working platform, a second working platform and a third working platform arranged on the vehicle frame; the first working platform is provided with a first platform driving mechanism, a first platform guiding mechanism and a first operating platform; the first platform driving mechanism is connected to the first operating platform and can drive the first operating platform to move to one side of the vehicle frame or to the other side along the width direction of the vehicle frame; the second working platform is provided with a lifting mechanism and a second operating platform, the lifting mechanism can drive the second operating platform to lift and lower and the second operating platform can move to one side of the vehicle frame and / or to the other side of the vehicle frame; the third working platform is provided with a rotating mechanism, a mechanical arm and a third operating platform, the mechanical arm and the third operating platform can rotate horizontally relative to the vehicle frame through the rotating mechanism, and the mechanical arm can drive the third operating platform to lift and lower. The tunnel maintenance engineering vehicle provided by the embodiment of the present application can meet the requirements of tunnel construction in different locations.

Description

Technical Field

[0001] The present application relates to railway maintenance equipment technology, and in particular to a tunnel maintenance engineering vehicle. Background Art

[0002] In recent years, my country's urban rail transit has flourished and achieved remarkable results. A well-connected urban and intercity rail transit network has been built. As of the end of 2020, the total length of urban rail transit lines in operation in my country has reached 7,978 kilometers. Due to the different ages of the built rail facilities, and the limitations of the survey methods, design technical standards and construction technology levels at the time, after years of operation, most tunnels have begun to have different types of defects or diseases that affect the safe operation of urban rails, such as leakage, voids, and local loosening of concrete. Timely maintenance of urban rail transit infrastructure is required to ensure the safe operation of rail lines.

[0003] After a certain degree of local demolition work is carried out on the existing rail transit tunnel wall leakage, concrete voids, loose concrete and other locations, the demolition locations need to be washed and moistened before applying concrete mortar. At present, demolition construction work usually involves building scaffolding in the area that needs demolition, and operators climbing up the scaffolding to carry out demolition. This is inefficient, has a long construction period, and is highly dangerous during the construction process. Only in some places where the environment meets the conditions can a flat car be used to carry a lifting platform, and the operator stands on the platform to carry out demolition. However, since the lifting platform does not have the ability to travel by itself or cannot travel on the track, it must be led into the construction area by a special traction vehicle. In addition, due to the limitations of the width of the rail flat car, the height of the platform, and the position of the personnel operating the equipment, demolition work is more difficult in places where the operator is far away or at a high place. Summary of the invention

[0004] In order to solve one of the above technical defects, a tunnel maintenance engineering vehicle is provided in an embodiment of the present application, comprising: a frame and a first working platform, a second working platform and a third working platform arranged on the frame along the length direction of the frame;

[0005] The first working platform is provided with a first platform driving mechanism, a first platform guiding mechanism and a first operating platform, wherein the first platform guiding mechanism extends along the width direction of the vehicle frame; the first platform driving mechanism is connected to the first operating platform and can drive the first operating platform to move to one side or the other side of the vehicle frame along the width direction of the vehicle frame;

[0006] The second working platform is provided with a lifting mechanism and a second operating platform, the lifting mechanism can drive the second operating platform to rise and fall, and the second operating platform can move to one side of the frame and / or to the other side of the frame along the width direction of the frame;

[0007] The third working platform is provided with a rotating mechanism, a mechanical arm and a third operating platform. The mechanical arm and the third operating platform can rotate horizontally relative to the frame through the rotating mechanism, and the mechanical arm can drive the third operating platform to rise and fall.

[0008] The technical solution provided in this embodiment is to set a first working platform, a second working platform and a third working platform on the frame, wherein the first platform driving mechanism in the first working platform drives the first operating platform to move along the width direction of the frame to one side of the frame or to the other side, and is cooperated with the movement by the first platform guiding mechanism to realize construction on both sides of the vehicle; the second working platform is provided with a lifting mechanism and a second operating platform, the lifting mechanism can drive the second operating platform to lift and lower and the second operating platform can move along the width direction of the frame to one side of the frame and / or to the other side of the frame, which can meet higher construction requirements; the third working platform is provided with a rotating mechanism, a mechanical arm and a third operating platform, the mechanical arm and the third operating platform can rotate horizontally relative to the third working platform through the rotating mechanism, and the mechanical arm can drive the third operating platform to lift and lower, which can further meet the requirements of farther, higher and more complex operating positions and has higher flexibility.

[0009] When the tunnel maintenance engineering vehicle enters the tunnel, the three working platforms mentioned above can meet the construction requirements of different positions. Operators use the corresponding working platforms for construction as needed, and the three working platforms can operate simultaneously, which can multiply the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0011] Figure 1 A schematic diagram of the structure of a tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0012] Figure 2 A side view of a tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0013] Figure 3 A top view of a tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0014] Figure 4 A schematic diagram of the structure of the first platform operating area in the tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0015] Figure 5 A schematic diagram of the structure of the sliding wheel on the first operating platform of the tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0016] Figure 6A schematic diagram of the structure of a first operating platform in a tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0017] Figure 7 A schematic diagram of the structure of the second platform operation area in the tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0018] Figure 8 A schematic diagram of the structure of the second telescopic protection device in the tunnel maintenance engineering vehicle provided in an embodiment of the present application being deployed;

[0019] Fig. 9 A bottom view showing the second platform working area of ​​the tunnel maintenance engineering vehicle provided in an embodiment of the present application;

[0020] Fig.10 A schematic structural diagram of the second platform slide rail and the second platform slide trough in the tunnel maintenance engineering vehicle provided in an embodiment of the present application.

[0021] Reference numerals:

[0022] 1-frame; 11-bogie; 12-motor controller and cooling system; 13-power battery; 14-hydraulic pump station; 16-brake assembly; 17-driving operating console; 18-generator set;

[0023] 2-first working platform; 21-first platform driving mechanism; 211-first driving cylinder; 212-second driving cylinder; 22-first platform guiding mechanism; 23-first operating platform; 231-first movable platform; 232-first fixed protection device; 233-through door; 24-first platform supporting mechanism; 25-sliding wheel;

[0024] 3-second working platform; 31-lifting mechanism; 32-second operating platform; 321-fixed platform; 322-second movable platform; 323-second fixed protection device; 324-second telescopic protection device; 3241-main railing; 3242-movable railing group; 33-second platform driving cylinder; 34-second platform slide rail; 35-second platform slideway;

[0025] 4-The third working platform. DETAILED DESCRIPTION

[0026] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0027] With the continuous increase in labor costs and the improvement of the timeliness requirements for repair and maintenance, the improvement of rail transit tunnel maintenance and construction efficiency has become a practical need, and less manpower has also become an inevitable trend in the inspection and maintenance of infrastructure such as tunnel maintenance. In this context, in response to the need to demolish existing urban rail transit tunnel wall cavities, water leaks, local loose concrete and other diseased locations, the embodiment of the present application provides a tunnel maintenance engineering vehicle equipped with three different types of working platforms that can meet the demolition requirements of different locations, heights and distances.

[0028] like Figures 1 to 3 As shown, this embodiment provides a tunnel maintenance engineering vehicle, including: a frame 1, bogies 11 are provided below both ends of the frame 1, one bogie 11 is a power bogie, and the other bogie 11 is a driven bogie. Two sets of drive motors are provided on the power bogie, which drive the wheels to move through a gear box.

[0029] A motor controller and cooling system 12, a power battery 13, a hydraulic pump station 14 and a brake assembly 16 are also provided at the lower middle of the vehicle frame 1. A driving console 17 is provided above both ends of the vehicle frame 1 to control the tunnel maintenance engineering vehicle to travel in the front and rear directions, respectively. It is assumed that one of the driving consoles 17 is the front driving console and the other is the rear driving console. A generator set 18 is also provided behind the front driving console.

[0030] The frame 1 is also provided with a first working platform 2, a second working platform 3 and a third working platform 4, which are arranged along the length direction of the frame. In one embodiment, the second working platform 3 is located in front of the rear vehicle operating platform, the third working platform 4 is located behind the generator set 18, and the first working platform 2 is located between the second working platform 3 and the third working platform 4.

[0031] like Figure 3 and Figure 4 As shown, the first working platform 2 is provided with a first platform driving mechanism 21, a first platform guiding mechanism 22 and a first operating platform 23. The first platform guiding mechanism 22 extends along the width direction of the frame; the first platform driving mechanism 21 is connected to the first operating platform 23 and can drive the first operating platform 23 to move to one side or the other side of the frame 1 along the width direction of the frame 1. The first platform guiding mechanism 22 is used to guide and limit the movement process of the first operating platform 23.

[0032] For example, the first operating platform 23 moves to the left side of the vehicle frame 1, and the operator stands on the first operating platform 23 to perform construction work on the tunnel on the left side of the engineering vehicle. When the construction on the left side is completed, the first operating platform 23 moves to the right to be stored above the vehicle frame 1. Alternatively, the first operating platform 23 moves to the right side of the vehicle frame 1, and the operator stands on the first operating platform 23 to perform construction work on the tunnel on the right side of the engineering vehicle, and after the construction is completed, it moves to the left to be stored above the vehicle frame 1. In addition, during the driving of the engineering vehicle, the first operating platform 23 is stored above the vehicle frame 1.

[0033] The first operating platform 23 cooperates with the first platform driving mechanism 21 and the second platform guiding mechanism 22 to enable the first operating platform 23 to extend to the left or to the right to meet the requirements of construction on both sides of the tunnel, and has extremely high flexibility.

[0034] The second working platform 3 is provided with a lifting mechanism 31 and a second operating platform 32 . The lifting mechanism 31 can drive the second operating platform 32 to rise and fall, and the second operating platform 32 can move to one side of the frame 1 and / or to the other side of the frame 1 along the width direction of the frame 1 .

[0035] For example, the second operating platform 32 can be deployed only to the left side of the vehicle frame 1, or only to the right side of the vehicle frame 1, or can be deployed to both the left and right sides of the vehicle frame 1 at the same time, and the operator can perform construction work on both sides of the tunnel on the second operating platform 32. After the construction is completed or during the vehicle driving, the second operating platform 32 is stored above the vehicle frame 1.

[0036] The lifting mechanism 31 can adjust the height of the second operating platform 32 to meet higher construction requirements. When the first operating platform 2 cannot meet the height requirement, the second operating platform 3 can be used for construction.

[0037] The third working platform 4 is provided with a rotating mechanism, a mechanical arm and a third operating platform. The mechanical arm and the third operating platform can rotate horizontally relative to the frame 1 through the rotating mechanism, and the mechanical arm can drive the third operating platform to rise and fall. The rotating mechanism can adopt a slewing bearing, and the mechanical arm includes a multi-stage mechanical arm, which is driven by a hydraulic cylinder to move. The third operating platform is set at the end of the final mechanical arm. The third operating platform is provided with a supporting platform and a fence. The operator stands on the supporting platform. The fence protects the operator from falling. The mechanical arm drives the third operating platform to rise and fall, and rotates 360° horizontally to perform construction at a higher or farther position in the tunnel.

[0038] When the first working platform 2 and the second working platform 3 cannot meet the height or distance requirements when unfolded, the third working platform 4 can be used for construction work.

[0039] The technical solution provided in this embodiment is to set a first working platform, a second working platform and a third working platform on the frame, wherein the first platform driving mechanism in the first working platform drives the first operating platform to move along the width direction of the frame to one side of the frame or to the other side, and is cooperated with the movement by the first platform guiding mechanism to realize construction on both sides of the vehicle; the second working platform is provided with a lifting mechanism and a second operating platform, the lifting mechanism can drive the second operating platform to lift and lower and the second operating platform can move along the width direction of the frame to one side of the frame and / or to the other side of the frame, which can meet higher construction requirements; the third working platform is provided with a rotating mechanism, a mechanical arm and a third operating platform, the mechanical arm and the third operating platform can rotate horizontally relative to the third working platform through the rotating mechanism, and the mechanical arm can drive the third operating platform to lift and lower, which can further meet the requirements of farther, higher and more complex operating positions and has higher flexibility.

[0040] When the tunnel maintenance engineering vehicle enters the tunnel, the three working platforms mentioned above can meet the construction requirements of different positions. Operators use the corresponding working platforms for construction as needed, and the three working platforms can operate simultaneously, which can multiply the construction efficiency.

[0041] On the basis of the above technical solution, this embodiment provides an implementation method of the first working platform 2:

[0042] like Figure 4 As shown, the first platform driving mechanism 21 includes: a first driving cylinder 211 and a second driving cylinder 212, both of which are arranged on the frame 1. The first driving cylinder 211 and the second driving cylinder 212 both extend along the width direction of the frame 1, and the installation directions of the first driving cylinder 211 and the second driving cylinder 212 are opposite; the piston rods of the first driving cylinder 211 and the second driving cylinder 212 are respectively connected to the first operating platform 23.

[0043] The piston rod of the first driving cylinder 211 extends, driving the first operating platform 23 to extend toward one side; the piston rod of the first driving cylinder 211 retracts, driving the first operating platform 23 to be retracted above the vehicle frame 1. The piston rod of the second driving cylinder 212 extends, driving the first operating platform 23 to extend toward the other side; the piston rod of the second driving cylinder 212 retracts, driving the first operating platform 23 to be retracted above the vehicle frame 1.

[0044] In this embodiment, the adjacently arranged first driving cylinder 211 and the second driving cylinder 212 form a group of cylinders. The two groups of cylinders are arranged at intervals. The cylinders arranged in the same direction synchronously drive the first operating platform 23 to move, so that the first operating platform 23 is subjected to balanced force during movement, thereby improving reliability.

[0045] On the basis of the above technical solution, the first platform guide mechanism 22 includes two sets of slide rails, which are arranged in sequence along the length direction of the frame 1, and the first platform driving mechanism 22 is located between the two sets of slide rails. The slide rails extend along the width direction of the frame 1, and the slide rails are recessed inward toward the side of the first platform driving mechanism 22 to form a slide groove, which is used to cooperate with the sliding wheel provided on the side of the first operating platform 23. The sliding wheel slides in the slide groove to limit and guide the movement of the first operating platform 23 relative to the slide rail. Figure 5 The sliding wheel 25 on the side of the first operating platform 23 is shown. The sliding wheel 25 adopts a composite bearing to ensure that the top and bottom of the sliding wheel are in contact with the inner wall of the slide groove, so that the movement of the first operating platform 23 is not prone to jamming.

[0046] On the basis of the above technical solution, the frame 1 is further provided with a first platform support mechanism 24 for supporting the first operating platform 23. The first platform support mechanism 34 includes a plurality of support rollers arranged in sequence along the width direction of the frame 1, and the rotation axis of the support rollers extends along the length direction of the frame 1. There is rolling friction between the support rollers and the first operating platform 23, which can support the first operating platform 23 on the one hand and assist the movement process of the first operating platform 23 on the other hand.

[0047] For the first operating platform 23, this embodiment provides an implementation method: Figure 1 , Figure 6 As shown, the first operating platform 23 includes: a first movable platform 231 and a first fixed protection device 232. The first movable platform 231 is connected to the first driving cylinder 211 and the second driving cylinder 212. The two driving cylinders drive the first movable platform 231 to move relative to the frame 1, and can be stored above the frame 1, or moved to one side of the frame 1 in the first direction, or moved to the other side of the frame 1 in the second direction. The operator can walk onto the first movable platform 231 to perform construction.

[0048] The first fixed guard device 232 is arranged around the first movable platform 231 and is fixedly connected to the first movable platform 231 so as to move together with the first movable platform 231. The first fixed guard device 232 is used to provide safety protection for the operator to prevent the operator from falling from the telescopic platform 33. The first fixed guard device 232 is formed by cross-connecting a plurality of beams. Passing doors 233 are also provided on both sides of the first fixed guard device 232, and the operator can enter and exit the telescopic platform 33 through the passing doors 333.

[0049] Sliding wheels 25 are provided on both sides of the first movable platform 231, which move along the slide rails in the first platform guide mechanism 22, guide and limit the movement of the first movable platform 231, and make the first movable platform 231 move along the width direction of the frame. The first movable platform 231 is also located above the first platform support mechanism 24, and there is rolling friction between it and the support rollers.

[0050] The height of the first fixed guard device 232 can be set according to the average height of an adult, for example, the height of the first fixed guard device 232 is set to 1.1 meters.

[0051] On the basis of the above technical solution, this embodiment provides an implementation of the second working platform 3: wherein the lifting mechanism 31 is a scissor-type lifting mechanism. The second operating platform 32 includes: two sets of telescopic platforms, which are arranged in sequence along the length direction of the frame 1, one set of telescopic platforms can be moved to one side of the frame 1 along the width direction of the frame 1, and the other set of telescopic platforms can be moved to the other side of the frame 1 along the width direction of the frame 1. The two sets of telescopic platforms can be extended independently, only one of them can be extended, or both can be extended.

[0052] One implementation method is: Figure 7 As shown, the telescopic platform includes: a fixed platform 321, a second movable platform 322, a second fixed protective device 323 and a second telescopic protective device 324. The fixed platform 321 is fixed on the frame 1, and a certain space is left between the fixed platform 321 and the frame 1. The second movable platform 322 can be stored under the fixed platform 322, or moved to one side of the frame 1 relative to the fixed platform 322 along the width direction of the frame 1. The second fixed protective device 323 is surrounded by the edge of the fixed platform 321. The second telescopic protective device 324 is arranged at the edge of the second movable platform 322, unfolds with the movement of the second movable platform 322 and is surrounded by the periphery of the second movable platform 322.

[0053] The second fixed protection device 323 can be connected into a fence structure by vertical beams and horizontal beams, fixedly installed on the second movable platform 322, and moves together with the second movable platform 322.

[0054] like Figure 8 As shown, the second telescopic protection device 324 includes: a main railing 3241 and a movable railing group 3242. The main railing 3241 is fixedly arranged at the edge of the second movable platform 322 away from the frame 1 after the second movable platform 322 is unfolded. The main railing 3241 is connected to form a fence structure by vertical beams and horizontal beams, and is fixedly installed on the second movable platform 322.

[0055] The movable railing group 3242 is arranged on both sides of the main railing 3241, one end of the movable railing group 3242 is connected to the fixed platform 321, and the other end is connected to the main railing 3241. The movable railing group 3242 can be extended and retracted along the width direction of the frame 1.

[0056] Referring to the above scheme, the movable railing group 3242 may include at least two movable railings, one of which is connected to the fixed platform 321, and the other is connected to the main railing 3241; a guide mechanism is provided between the movable railings so as to enable relative movement through the guide mechanism.

[0057] Specifically, the movable railing group 3242 may include two groups of fences, one of which is connected to the fixed platform 321, and the other is connected to the main railing 3241, and the two groups are directly connected and can move relative to each other. Alternatively, the movable railing group 3242 may also include four groups of fences, each group of fences is connected and can move relative to each other, and the two outer groups of fences are connected to the fixed platform 321 and the main railing 3241 respectively.

[0058] The fixed platforms 321 in the above two sets of telescopic platforms are arranged adjacent to each other, and a common second fixed protective device 323 is provided at the butt joint portion of the two fixed platforms 321, and a through hole is provided on the second fixed protective device 323 so that an operator can enter the other fixed platform 321 from one fixed platform 321 through the through hole.

[0059] like Fig. 9 and Fig.10 As shown, a second platform driving cylinder 33 is provided below the fixed platform 321 and is connected to the second movable platform 322 for driving the second movable platform 322 to move along the width direction of the frame.

[0060] Furthermore, a second platform guide mechanism is provided below the fixed platform 321, including a second platform slide rail 34 and a second platform slide groove 35. The second platform slide groove 35 is fixed below the fixed platform 321 by a channel steel, and the second platform slide rail 34 can move along the second platform slide groove 35. The second platform slide rail 34 is connected to the second movable platform 322, and is used to guide the movement of the second movable platform 322.

[0061] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A tunnel maintenance engineering vehicle, characterized in that: include: A vehicle frame and a first working platform, a second working platform and a third working platform arranged on the vehicle frame along the length direction of the vehicle frame; The first working platform is provided with a first platform driving mechanism, a first platform guiding mechanism and a first operating platform, wherein the first platform guiding mechanism extends along the width direction of the vehicle frame; the first platform driving mechanism is connected to the first operating platform and can drive the first operating platform to move to one side or the other side of the vehicle frame along the width direction of the vehicle frame; The second working platform is provided with a lifting mechanism and a second operating platform, the lifting mechanism can drive the second operating platform to rise and fall, and the second operating platform can move to one side of the frame and / or to the other side of the frame along the width direction of the frame; The third working platform is provided with a rotating mechanism, a mechanical arm and a third operating platform. The mechanical arm and the third operating platform can rotate horizontally relative to the frame through the rotating mechanism, and the mechanical arm can drive the third operating platform to rise and fall.

2. The tunnel maintenance engineering vehicle according to claim 1, characterized in that: The platform driving mechanism includes: a first driving cylinder and a second driving cylinder, which are arranged on the frame; the first driving cylinder and the second driving cylinder both extend along the width direction of the frame, and the installation directions of the first driving cylinder and the second driving cylinder are opposite; the piston rods of the first driving cylinder and the second driving cylinder are respectively connected to the first operating platform.

3. The tunnel maintenance engineering vehicle according to claim 2, characterized in that: The platform guide mechanism includes two sets of slide rails, which are arranged in sequence along the length direction of the frame, and the platform drive mechanism is located between the two sets of slide rails; the slide rails extend along the width direction of the frame, and the slide rails are recessed inward toward the side of the platform drive mechanism to form a slide groove for cooperating with the sliding wheel set on the side of the first operating platform.

4. The tunnel maintenance engineering vehicle according to claim 1, characterized in that: The first working platform also includes: a platform supporting mechanism for supporting the first operating platform, including a plurality of supporting rollers arranged in sequence along the width direction of the frame, and the rotation axis of the supporting rollers extends along the length direction of the frame.

5. The tunnel maintenance engineering vehicle according to claim 1, characterized in that: The first operating platform includes: The first movable platform can be stored above the frame, or moved to one side of the frame in a first direction, or moved to the other side of the frame in a second direction; The first fixed protection device is arranged around the floor and is fixedly connected to the first movable platform.

6. The tunnel maintenance engineering vehicle according to claim 1, characterized in that: The lifting mechanism is a scissor-type lifting mechanism; The second operating platform includes: two groups of telescopic platforms, which are arranged in sequence along the length direction of the frame, one group of telescopic platforms can be moved to one side of the frame along the width direction of the frame, and the other group of telescopic platforms can be moved to the other side of the frame along the width direction of the frame.

7. The tunnel maintenance engineering vehicle according to claim 6, characterized in that: The telescopic platform comprises: Fixed platform; The second movable platform can be stored under the fixed platform or moved to one side of the frame relative to the fixed platform along the width direction of the frame; A second fixed protection device is arranged around the edge of the fixed platform; The second telescopic protection device is arranged at the edge of the second movable platform, is unfolded along with the movement of the second movable platform and is arranged around the periphery of the second movable platform.

8. The tunnel maintenance engineering vehicle according to claim 7, characterized in that: The second telescopic protection device comprises: A main railing, fixedly arranged on an edge of the second movable platform away from the vehicle frame after the second movable platform is unfolded; The movable railing group is arranged on both sides of the main railing; one end of the movable railing group is connected to the fixed platform, and the other end is connected to the main railing; the movable railing group can be extended and retracted along the width direction of the frame.

9. The tunnel maintenance engineering vehicle according to claim 8, characterized in that: The movable railing set includes: at least two movable railings; One of the movable railings is connected to the fixed platform, and the other movable railing is connected to the main railing; a guide mechanism is arranged between the movable railings so as to enable relative movement along a first direction through the guide mechanism.

10. The tunnel maintenance engineering vehicle according to claim 9, characterized in that: The fixed platforms in the two sets of telescopic platforms are arranged adjacent to each other, and a common second fixed protection device is arranged at the butting part of the two fixed platforms, and a through hole is opened on the second fixed protection device so that operators can enter the other fixed platform through the through hole from one fixed platform.

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