An arch installation device for tunnel disease repair

Abstract

The application provides an arch installation device for tunnel disease repair in operation, which comprises a track flat car, a base body arranged on the track flat car, a plurality of bearing platforms arranged symmetrically along the tunnel contour on the base body, and an arch lifting tool and an arch clamping tool arranged on the plurality of bearing platforms respectively. The arch installation device for tunnel disease repair in operation provided by the application can meet the displacement in the tunnel by arranging the track flat car, and can complete the contact line and the building bypassing by arranging the bearing platform, the arch lifting tool and the arch clamping tool to cooperate and perform the stepping action, and can transport the arch to each installation position to realize the arch installation.

Description

Technical Field

[0001] This invention relates to the field of tunnel arch installation equipment, and more specifically, to an arch installation device for repairing defects in an operational tunnel. Background Technology

[0002] With the continuous growth of the total mileage of railway tunnels in my country, defects in operational railway tunnels are becoming increasingly frequent, including cracking, spalling, mesh cracking, water leakage, and frost heave in the tunnel lining structure. These defects have seriously threatened the operational safety of trains.

[0003] To address tunnel structural defects, engineering departments often use makeshift scaffolding and machinery for repairs. Among these, arch frame installation is the most critical and time-consuming process, currently carried out manually with simple hoisting tools and scaffolding. This not only compromises construction safety but also results in high labor intensity, low efficiency, poor quality, slow progress, and a low safety factor.

[0004] Currently, in this technical field, to improve the efficiency of arch frame installation, tunnel arch frame trolleys are commonly used, essentially achieving semi-mechanization and significantly reducing the labor intensity of operators. Existing tunnel arch frame installation structures utilize robotic arms or other lifting devices to grab the arch frame from the ground, then close the gripper to lift the arch frame into place. However, existing tunnel arch frame installation equipment is designed for the tunnel construction phase and does not consider the arch frame installation conditions in the repair of defects in already operational tunnels. Furthermore, the repair work on defects in already operational tunnels faces numerous construction limitations due to their operational nature. These limitations mainly include the following aspects:

[0005] 1) The working time is short, limited to tunnel operation windows (4-6 hours). After deducting time for loading / unloading, construction preparation, etc., the actual working time is less than 4 hours. Currently, in tunnel repair, due to the lack of suitable machinery, manual labor is still the primary method, supplemented by simple tools. The installation of a 1.2m lining arch requires 7 operation windows and more than 10 people. Therefore, higher requirements are placed on work efficiency.

[0006] 2) Existing tunnel construction limitations: According to national standards, planning and electrification requirements, the top of currently operating tunnels is generally equipped with an overhead contact line, and lighting lines, dedicated cables and public network cables are installed on both sides of the tunnel. Due to stress requirements, the contact wires suspended on the overhead contact line are arranged in a zigzag pattern. During construction, it is necessary to avoid them; otherwise, equipment and personnel may be at risk of electric shock and damage to the lines during operation.

[0007] 3) Transportation restrictions: According to existing laws and regulations, maintenance equipment and tools can only be transported by qualified railway locomotives. The maintenance equipment and tools carried on the locomotive while it is in motion must meet the requirements of GB1.46.1-2020 "Standard Gauge Railway Clearance Part 1: Locomotive and Rolling Stock Clearance" and must not exceed the transportation restrictions.

[0008] Therefore, under the aforementioned constraints, how to improve the efficiency and quality of arch frame installation during the repair of defects in operational tunnels, reduce labor intensity, ensure construction safety, and solve problems related to transportation, contact wire detours, and automated installation are urgent issues that need to be addressed by those skilled in the art. Summary of the Invention

[0009] The present invention provides an arch frame installation device for repairing defects in an operational tunnel, including a rail flatbed car, a base set on the rail flatbed car, multiple bearing platforms symmetrically arranged along the tunnel outline on the base, and arch frame lifting fixtures and arch frame clamping fixtures respectively set on the multiple bearing platforms.

[0010] Optionally, the bearing platform is a bearing unit of the arch frame installation device, and the bearing platform is provided with two sets symmetrically arranged at intervals along the tunnel contact line. Each set is provided with two pieces spaced apart along the direction from the tunnel contact line to the tunnel wall. The two bearing platforms located away from the tunnel contact line are connected to arch frame lifting fixtures to drive the arch frame lifting fixtures to move in the height and horizontal directions. The two bearing platforms located near the tunnel contact line are connected to arch frame clamping fixtures to drive the arch frame clamping fixtures to move in the height and horizontal directions.

[0011] Optionally, the single-piece bearing platform includes a transverse base, a lifting mechanism, and a working platform; the transverse base includes a main frame, a bottom mounting base, and a scissor sliding mechanism; the main frame is connected to the arch frame lifting fixture or the arch frame clamping fixture; the bottom mounting base is connected to the base; the scissor sliding mechanism connects the main frame and the bottom mounting base and adjusts the relative position of the main frame and the bottom mounting base in the horizontal direction; one end of the lifting mechanism is hinged to the bottom mounting base, and the other end is hinged to the working platform, used to adjust the relative position of the bottom mounting base and the working platform in the height direction; the working platform is connected to the arch frame lifting fixture or the arch frame clamping fixture.

[0012] Optionally, the single-piece arch frame lifting fixture includes a base, an arch frame lifting arm, an arch frame support, and a swing cylinder; the base is connected to the bearing platform, and a connecting flange seat is provided on the base, which is connected to both the arch frame lifting arm and the sliding device; one end of the swing cylinder is hinged to the arch frame lifting arm, and the other end of the swing cylinder is hinged to the connecting flange seat, for driving the arch frame lifting arm to swing relative to the sliding device; the other end of the arch frame lifting arm is connected to the arch frame support, and the arch frame is mounted on the arch frame support; the sliding device is slidably connected to the base.

[0013] Optionally, a winch is also installed on the arch frame lifting arm, and the wire rope of the winch is connected to the arch frame.

[0014] Optionally, the part of the arch support for gripping the arch is configured to include a structure with multiple flexible rollers, and the multiple flexible rollers are in a rolling connection with the arch.

[0015] Optionally, the arch frame grab arm includes a first telescopic arm, a second telescopic arm, and a third telescopic arm, which are connected to each other to form a boom structure with a certain angle between them; one end of the boom structure is hinged to the mounting flange seat, and the other end of the boom structure is connected to the arch frame support.

[0016] Optionally, the arch frame lifting fixture further includes a sliding device and a first sliding track structure; a plurality of threaded shaft rollers are provided on the base, and the plurality of threaded shaft rollers are arranged side by side to form the first sliding track structure; the sliding device is slidably connected to the first sliding track structure.

[0017] Optionally, the single-piece arch frame clamping fixture includes a sliding bracket, a telescopic arm, an arch frame support, and a tilting cylinder; the sliding bracket is connected to the bearing platform, and a sliding plate is provided on the sliding bracket; one end of the telescopic arm is hinged to the sliding plate, and the other end of the telescopic arm is equipped with the arch frame support; one end of the tilting cylinder is hinged to the telescopic arm, and the other end of the tilting cylinder is hinged to the sliding plate; the arch frame is installed on the arch frame support.

[0018] Optionally, the sliding bracket is also provided with multiple sliding rollers arranged in parallel, and the multiple sliding rollers are spaced apart to form a second sliding track structure. The sliding plate and the second sliding track structure are slidably connected.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention provides an arch frame installation device for repairing defects in an operational tunnel. By setting up a rail flatbed car to allow it to move within the tunnel, and by setting up a bearing platform, an arch frame lifting tool and an arch frame clamping tool to work together to perform a stepping action to avoid the contact line and the building, the arch frame is lifted and transported to various installation positions to achieve the installation of the frame.

[0021] (2) In this invention, by setting the bearing platform as a structure that can be displaced in the horizontal and vertical directions, the working range of the arch frame lifting fixture and the arch frame clamping fixture set on the bearing platform can cover the tunnel profile section. Multiple arch frames can be completed in one stop, which greatly expands the working range. It can be applied to the working conditions of short working time in the already operational tunnel, and the existing tunnel structure and transportation restrictions. It solves the problems of transportation, contact line avoidance and automated installation of the arch frame installation device in the already operational tunnel, and meets the needs of efficient and high-quality arch erection for the repair of cross-sectional defects in the operational tunnel.

[0022] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of an arch frame installation device for repairing defects in an operational tunnel, as described in an embodiment of the present invention.

[0025] Figure 2 yes Figure 1 Axonometric schematic diagram of the load-bearing platform;

[0026] Figure 3 yes Figure 2 Axonometric schematic diagram of the base of the load-bearing platform;

[0027] Figure 4 yes Figure 1 Axonometric schematic diagram of the lifting fixture for the central arch frame;

[0028] Figure 5 yes Figure 1 Axonometric schematic diagram of the clamping fixture for the central arch frame;

[0029] Figure 6 This is a schematic diagram of the state of an arch frame installation device for repairing defects in an operational tunnel during the construction process, according to an embodiment of the present invention.

[0030] in:

[0031] 1. Arch frame clamping fixture; 1.1. Sliding bracket; 1.1.1. Sliding roller; 1.2. Telescopic arm; 1.3. Arch frame support; 1.3.1. Base plate; 1.4. Tilting cylinder;

[0032] 2. Arch frame lifting fixture, 2.1 base, 2.1.1 threaded shaft roller, 2.2 arch frame lifting arm, 2.3 arch frame support, 2.4 winch, 2.5 swing cylinder, 2.6 sliding device;

[0033] 3. Supporting platform; 3.1. Horizontal sliding base; 3.1.1. Main frame; 3.1.2. Mounting base; 3.1.3. Scissor lift mechanism; 3.2. Lifting mechanism; 3.3. Working platform;

[0034] 4. Matrix; 5. Rail flatbed vehicle. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of the present invention clearer and easier to understand, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings of the present invention are all in a simplified form and use non-precise proportions, and are only used to facilitate and clearly assist in illustrating the implementation of the present invention; the "several" mentioned in the present invention are not limited to the specific number shown in the examples in the accompanying drawings; the orientations or positional relationships indicated by terms such as "front," "middle," "rear," "left," "right," "up," "down," "top," "bottom," and "center" mentioned in the present invention are all based on the orientations or positional relationships shown in the accompanying drawings of the present invention, and do not indicate or imply that the device or component referred to must have a specific orientation, nor should they be construed as limitations on the present invention.

[0036] This embodiment:

[0037] See Figure 1 As shown, an arch frame installation device for repairing defects in an operational tunnel includes a rail flatbed trolley 5 for transport under road conditions, a base 4 connected to a fixing hook mounted above the rail flatbed trolley 5, multiple support platforms 3 symmetrically arranged along the tunnel outline on the base 4, and arch frame lifting fixtures 2 and arch frame clamping fixtures 1 respectively mounted on the multiple support platforms 3. Preferably, the rail flatbed trolley 5 is existing technology.

[0038] See Figure 2 and Figure 3 As shown, the single-piece support platform 3 includes a transverse base 3.1, a lifting mechanism 3.2, and a working platform 3.3;

[0039] The transverse base 3.1 includes a main frame 3.1.1, a bottom mounting base 3.1.2, and a scissor sliding mechanism 3.1.3. The main frame 3.1.1 is connected to the arch frame lifting fixture 2 or the arch frame clamping fixture 1. The bottom mounting base 3.1.2 is connected to the base 4. The scissor sliding mechanism 3.1.3 connects the main frame 3.1.1 and the bottom mounting base 3.1.2 and adjusts the relative horizontal position between the main frame 3.1.1 and the bottom mounting base 3.1.2.

[0040] One end of the lifting mechanism 3.2 is hinged to the bottom mounting base 3.1.2, and the other end of the lifting mechanism 3.2 is hinged to the working platform 3.3, which is used to adjust the relative position between the bottom mounting base 3.1.2 and the working platform 3.3 in the height direction;

[0041] The working platform 3.3 is used to connect to the arch frame lifting fixture 2 or the arch frame clamping fixture 1.

[0042] Optionally, a first groove is provided on the bottom mounting base 3.1.2 for sliding connection with the scissor sliding mechanism 3.1.3, and a second groove is provided on the main frame 3.1.1 for sliding connection with the scissor sliding mechanism 3.1.3; the scissor sliding mechanism 3.1.3 is preferably configured as a hydraulically driven scissor sliding structure, and by adjusting the hydraulic drive stroke of the scissor sliding mechanism 3.1.3, the main frame 3.1.1 and the bottom mounting base 3.1.2 can slide relative to each other in the horizontal direction.

[0043] Optionally, the lifting mechanism 3.2 is preferably configured as a hydraulically driven scissor lift structure. By driving the lifting mechanism 3.2 to extend or retract, the distance between the bottom mounting base 3.1.2 and the working platform 3.3 along the height direction can be adjusted to match the height requirements of the working surface.

[0044] Optionally, the bearing platform 3 is a bearing unit of the arch frame installation device. Two sets are symmetrically arranged according to the position of the tunnel contact line. Each set has two pieces spaced apart along the direction from the tunnel contact line to the tunnel wall. Each bearing platform 3 can expand its coverage range to adapt to different arch frame interfaces through the scissor sliding mechanism 3.1.3 of its transverse base 3.1. The working platform 3.3 of the two bearing platforms 3 located far from the tunnel contact line (i.e., the two bearing platforms 3 closest to the tunnel wall) is connected to an arch frame lifting fixture 2 to drive the arch frame lifting fixture 2 to move in the height and horizontal directions. The working platform 3.3 of the two bearing platforms 3 located close to the tunnel contact line (i.e., the two bearing platforms 3 located between the two bearing platforms 3 closest to the tunnel wall) is connected to an arch frame clamping fixture 1 to drive the arch frame clamping fixture 1 to move in the height and horizontal directions.

[0045] See Figure 4 As shown, the single-piece arch frame lifting fixture 2 includes a base 2.1, an arch frame lifting arm 2.2, an arch frame support 2.3, a swing cylinder 2.5, and a sliding device 2.6;

[0046] The base 2.1 is the main body of the arch frame lifting fixture 1, and a mounting flange seat is welded to one end of the base 2.1;

[0047] One end of the swing cylinder 2.5 is hinged to the boom structure, and the other end of the swing cylinder 2.5 is hinged to the mounting flange seat.

[0048] The arch frame lifting arm 2.2 is the main actuator of the arch frame lifting fixture 2. The arch frame lifting arm 2.2 includes a first telescopic arm, a second telescopic arm, and a third telescopic arm. The first telescopic arm, the second telescopic arm, and the third telescopic arm are connected to each other to form a boom structure with a certain angle between them. One end of the boom structure is hinged to the mounting flange seat, and the other end of the boom structure is connected to the arch frame support 2.3 through the mounting plate so that the arch frame support 2.3 is close to the tunnel wall, thereby restraining the swaying arc of the arch frame placed on the arch frame support 2.3 and creating a track space for the arch frame lifting and transportation.

[0049] Optionally, a winch 2.4 is also provided on the arch frame lifting arm 2.2. The wire rope of the winch 2.4 is connected to the arch frame via the arch frame support 2.3 to restrain the transport of the traction arch frame.

[0050] Optionally, the arch support 2.3 is provided with multiple flexible rollers that can rotate in three directions at the part connected to the arch frame. The rolling connection between the multiple flexible rollers and the arch frame improves the passability of the arch frame during traction transportation.

[0051] In addition to the above structure, the arch frame lifting fixture 2 also includes a sliding device 2.6 and a first sliding track structure; a plurality of threaded shaft rollers 2.1.1 are provided on the base 2.1, and the plurality of threaded shaft rollers 2.1.1 are arranged side by side to form the first sliding track structure; the sliding device 2.6 is slidably connected to the first sliding track structure so that the gear and rack transmission system of the sliding device 2.6 can smoothly and efficiently drive the entire arch frame lifting fixture 2 to slide on the first sliding track structure.

[0052] The arch frame lifting fixture 2 is a transport unit for the arch frame. The arch frame to be transported is placed inside the arch frame support 2.3, and the winch 2.4 is used to complete the traction and fixation. During the transportation process, the arch frame lifting arm 2.2 is adjusted to extend and retract, and the swing cylinder 2.5 rotates in coordination with the lifting and lowering of the bearing platform 3 to perform a stepping action to complete the avoidance of the contact line and the building. Along the track space formed by the arch frame support 2.3 and the tunnel wall, the arch frame is lifted and transported to the top of the tunnel, and then transported to the respective installation positions using the sliding device 2.6.

[0053] The specific lifting action of the arch frame lifting fixture 2 is as follows:

[0054] Place the transport arch frame inside the arch frame support and connect and secure it to the arch frame using the wire rope of the winch;

[0055] Action a: The winch's rotation and rope winding action drags the arch frame upward along the track space formed by the arch frame support and the tunnel wall.

[0056] Action b: The upward rotation of the arched grab arm driven by the swing cylinder;

[0057] Action c: The extension and retraction of the grab arm and arch support caused by the adjustment of the stroke of the internal hydraulic cylinder of the arch grab arm;

[0058] Action d: The overall lifting motion of the supporting platform;

[0059] Actions a through d are performed in combination, allowing the arch frame fixture to rise along the track space formed by the arch frame support and the tunnel wall, thus avoiding the contact line and the structure, and reaching the top of the tunnel.

[0060] See Figure 5 As shown, the single-piece arch frame clamping fixture 1 includes a sliding bracket 1.1, a telescopic arm 1.2, an arch frame support 1.3, and a tilting cylinder 1.4;

[0061] The sliding bracket 1.1 is the main base of the arch frame clamping fixture 1. The sliding bracket 1.1 is connected to the working platform 3.3, and a sliding plate is provided on the sliding bracket 1.1.

[0062] One end of the telescopic arm 1.2 is hinged to the sliding plate, and the other end of the telescopic arm 1.2 is connected to the arch support 1.3;

[0063] One end of the tilting cylinder 1.4 is hinged to the telescopic arm 1.2, and the other end of the tilting cylinder 1.4 is hinged to the sliding bracket 1.1, so that by adjusting the extension or retraction of the tilting cylinder 1.4, the telescopic arm 1.2 can be driven to tilt around the sliding bracket 1.1, thereby realizing the storage and unfolding of the telescopic wall 1.2.

[0064] The arch support 1.3 is used to limit and lift the arch frame, and to clamp the arch frame so that the arch frame is fixedly installed.

[0065] Optionally, the sliding bracket 1.1 is also provided with a plurality of parallel sliding rollers 1.1.1, which are spaced apart to form a second sliding track structure. The sliding plate and the second sliding track structure are slidably connected to achieve the adjustment of the relative position between the telescopic arm 1.2 and the sliding bracket 1.1.

[0066] Optionally, the telescopic arm 1.2 is the main actuator of the arch frame clamping fixture 1. The telescopic arm 1.2 includes an inner cylinder, an outer cylinder and a telescopic cylinder. The inner cylinder and the outer cylinder are nested together. One end of the telescopic cylinder is connected to the inner cylinder and the other end of the telescopic cylinder is connected to the outer cylinder, so that the inner cylinder and the outer cylinder move closer or further apart under the drive of the telescopic cylinder.

[0067] See Figure 6 As shown, the working process of the arch frame installation device for repairing defects in an operational tunnel provided by the present invention is as follows:

[0068] After being transported to the site of the defect by the rail flatbed car 5, the bearing platform 3 adjusts the stroke of the scissor sliding mechanism 3.1.3 on the transverse base 3.1 to move the entire platform laterally to a position that matches the tunnel outline and begin the arch frame operation;

[0069] The arch frame lifting fixture 2 adjusts the stroke of the lifting arm 2.2 to place the arch frame to be transported inside the arch frame support 2.3, close to the tunnel wall, to restrain the arch frame from swaying and create a track space for lifting and transporting the arch frame. The winch 2.4 wire rope is adjusted to connect with the arch frame through the space inside the arch frame support 2.3 to restrain and pull the arch frame during transport. During the transport process, the extension and retraction of the arch frame lifting arm 2.2 and the rotation of the swing cylinder 2.5 are coordinated with the lifting and lowering of the bearing platform 3 to perform stepping movements to complete the avoidance of the contact line and the building. Along the track space formed by the arch frame support 2.3 and the tunnel wall, the arch frame is lifted and transported to the top of the tunnel, and then transported to the installation position using the sliding device 2.6.

[0070] Then, with the help of the arch frame clamping fixture 1, the arch frame is clamped by lifting, and the installation and fixing of the arch frame is completed.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An arch frame installation device for repairing defects in an operational tunnel, characterized in that, It includes a rail flatbed car (5), a base (4) set on the rail flatbed car (5), a multi-piece bearing platform (3) symmetrically arranged on the base (4) along the tunnel outline, and an arch frame lifting fixture (2) and an arch frame clamping fixture (1) respectively set on the multi-piece bearing platform (3). The bearing platform (3) is the bearing unit of the arch frame installation device, and the bearing platform (3) is provided with two sets of symmetrically arranged along the tunnel contact line, and each set is provided with two pieces spaced apart along the tunnel contact line to the tunnel wall. The two bearing platforms (3) located far from the tunnel contact line are each connected to the arch frame lifting fixture (2) so as to drive the arch frame lifting fixture (2) to move along the height direction and the horizontal direction. The arch frame lifting fixture (2) includes a base (2.1), an arch frame lifting arm (2.2), an arch frame support (2.3), and a swing cylinder (2.5). The base (2.1) is connected to the bearing platform (3), and the base (2.1) is provided with a connecting flange seat, which is connected to the arch frame lifting arm (2.2) and the sliding device (2.6). One end of the swing cylinder (2.5) is hinged to the arch frame lifting arm (2.2), wherein there are three arch frame lifting arms (2.2), and the other end of the swing cylinder (2.5) is hinged to the connecting flange seat, for driving the arch frame lifting arm (2.2) to swing relative to the sliding device (2.6); The other end of the arch frame grab arm (2.2) is connected to the arch frame support (2.3), and the arch frame is installed on the arch frame support (2.3); The sliding device (2.6) is slidably connected to the base (2.1); The arched grab arm (2.2) includes a first telescopic arm, a second telescopic arm and a third telescopic arm, which are connected to each other to form a boom structure with a certain angle between them. One end of the boom structure is hinged to the mounting flange seat, and the other end of the boom structure is connected to the arch support (2.3). During transportation, the extension and retraction of the arch grab arm (2.2) and the rotation of the swing cylinder (2.5) are coordinated with the lifting of the bearing platform (3) to perform the stepping action to complete the avoidance of the contact line and the building.

2. The arch frame installation device for repairing defects in operational tunnels according to claim 1, characterized in that, The two bearing platforms (3) located near the tunnel contact line are each connected to an arch frame clamping fixture (1) to drive the arch frame clamping fixture (1) to move along the height direction and the horizontal direction.

3. The arch frame installation device for repairing defects in operational tunnels according to claim 2, characterized in that, The carrying platform (3) includes a transverse base (3.1), a lifting mechanism (3.2), and a working platform (3.3). The transverse base (3.1) includes a main frame (3.1.1), a bottom mounting base (3.1.2), and a scissor sliding mechanism (3.1.3). The main frame (3.1.1) is connected to the arch frame lifting fixture (2) or the arch frame clamping fixture (1). The bottom mounting base (3.1.2) is connected to the base (4). The scissor sliding mechanism (3.1.3) connects the main frame (3.1.1) and the bottom mounting base (3.1.2) and adjusts the relative horizontal position between the main frame (3.1.1) and the bottom mounting base (3.1.2). One end of the lifting mechanism (3.2) is hinged to the bottom mounting base (3.1.2), and the other end is hinged to the working platform (3.3), which is used to adjust the relative position between the bottom mounting base (3.1.2) and the working platform (3.3) along the height direction; The working platform (3.3) is connected to the arch frame lifting fixture (2) or the arch frame clamping fixture (1).

4. The arch frame installation device for repairing defects in operational tunnels according to claim 1, characterized in that, A winch (2.4) is also installed on the arch frame lifting arm (2.2), and the wire rope of the winch (2.4) is connected to the arch frame.

5. The arch frame installation device for repairing defects in an operational tunnel according to claim 1, characterized in that, The part of the arch support (2.3) used to grasp the arch is configured to include a structure of multiple flexible rollers, with the multiple flexible rollers having a rolling connection with the arch.

6. The arch frame installation device for repairing defects in operational tunnels according to any one of claims 1-5, characterized in that, The arch frame lifting fixture (2) also includes a sliding device (2.6) and a first sliding track structure; Several threaded shaft rollers (2.1.1) are provided on the base (2.1), and several threaded shaft rollers ( 2.1.1) The tracks are arranged side by side to form the first sliding track structure; The sliding device (2.6) is slidably connected to the first sliding track structure.

7. The arch frame installation device for repairing defects in operational tunnels according to claim 2, characterized in that, The arch frame clamping fixture (1) includes a sliding bracket (1.1), a telescopic arm (1.2), an arch frame support (1.3), and a tilting cylinder (1.4); the sliding bracket (1.1) is connected to the bearing platform (3), and a sliding plate is provided on the sliding bracket (1.1); one end of the telescopic arm (1.2) is hinged to the sliding plate, and the other end of the telescopic arm (1.2) is equipped with the arch frame support (1.3); one end of the tilting cylinder (1.4) is hinged to the telescopic arm (1.2), and the other end of the tilting cylinder (1.4) is hinged to the sliding plate; the arch frame is installed on the arch frame support (1.3).

8. The arch frame installation device for repairing defects in operational tunnels according to claim 7, characterized in that, The sliding bracket (1.1) is also provided with multiple sliding rollers (1.1.1) arranged in parallel, and the multiple sliding rollers ( 1.1.1) The two sliding rail structures are arranged at intervals to form a second sliding rail structure, and the sliding plate and the second sliding rail structure are slidably connected.

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