Pipe piece grabbing and lifting device for tunnel repair

Abstract

The invention provides a pipe piece grabbing and lifting device for tunnel repair. The snatching device comprises a telescopic arm, a segment bearing mechanism, a universal joint for connecting the telescopic arm and the segment bearing mechanism, and a rotation driving mechanism for driving the segment bearing mechanism to rotate along a Z axis; the rotary driving mechanism is hinged to the universal joint to drive the segment bearing mechanism to rotate along the Y axis, the swing driving mechanism is hinged to the universal joint to drive the segment bearing mechanism to rotate along the Y axis, the pitching driving mechanism is hinged to the universal joint to drive the segment bearing mechanism to rotate along the X axis, and the universal joint is in linkage with the rotary driving mechanism, the swing driving mechanism and the pitching driving mechanism. The device is simple in structure, high in automation degree and capable of accurately adjusting the angle of the duct piece bearing mechanism in multiple dimensions, operation can be rapidly carried out in a tunnel, the single-time repairing operation time is greatly shortened, interference to tunnel traffic or operation is reduced, the high-precision positioning capacity of the device ensures the splicing quality of new duct pieces, the tunnel repairing effect is reliable, and the working efficiency is improved. Manual construction is reduced, and potential safety hazards of construction are reduced.

Description

Technical Field

[0001] This application relates to the field of tunnel construction technology, and in particular to a segment lifting device for tunnel repair. Background Technology

[0002] Tunnels are engineering structures buried in the earth's strata. In transportation tunnels such as highways and railways, as the operating time continues to extend, the tunnel's defects become more and more serious.

[0003] Conventional tunnel repair methods include adding arches, chiseling and embedding arches, and attaching steel strips. However, traditional construction methods all have obvious drawbacks, such as long construction periods, significant impact on traffic, complex construction procedures, and limited construction results.

[0004] Currently, the industry uses precast reinforced concrete segments for assembly, which is convenient to construct, has little impact on traffic, and has reliable repair methods. However, this method faces technical bottlenecks in the segment installation process during actual construction. Existing mechanized equipment is not adaptable enough, and existing shield tunneling machines cannot be adapted to the existing tunnel space and cross-sectional shape. On the other hand, using manual labor with simple tools poses huge risks to efficiency, accuracy, and safety, thus limiting its application.

[0005] In view of this, it is necessary to design a segment lifting device for tunnel repair to solve one of the above problems. Summary of the Invention

[0006] This application provides a segment grabbing device for tunnel repair. The grabbing device can accurately grab and position segments with multiple degrees of freedom to adapt to different tunnel cross sections, thereby improving construction efficiency and construction safety.

[0007] To achieve the above objectives, the technical solution provided in this application is as follows: This application provides a segment lifting device for tunnel repair, wherein the lifting device includes: Telescopic boom; A universal joint, which is hinged to the end of the telescopic arm. The segment support mechanism includes a bracket for supporting the segment and an overturning structure hinged to the universal joint; A rotary drive mechanism is disposed on the overturning structure and is used to drive the bracket to rotate around the Z-axis, which is perpendicular to the plane of the overturning structure. A pair of symmetrically arranged swing drive mechanisms, one end of which is hinged to the universal joint and the other end of which is hinged to the overturning structure, are used to drive the overturning structure to swing along the Y-axis; A pitch drive mechanism, one end of which is hinged to a universal joint and the other end of which is fixed to the telescopic arm, is used to drive the universal joint to swing around the X-axis, thereby causing the overturning structure to swing around the X-axis. The Y-axis and X-axis are both perpendicular to the Z-axis.

[0008] Furthermore, the rotation drive mechanism includes a drive motor disposed on the overturning structure and a gear transmission assembly driven by the drive motor, the gear transmission assembly being connected to the bracket to drive its rotation.

[0009] Furthermore, the pair of swing drive mechanisms are hydraulic cylinders, with the cylinder body end of each hydraulic cylinder hinged to the lower part of the universal joint, and the piston rod end hinged to the lower end of the overturning structure. The two hydraulic cylinders are configured to perform differential extension and retraction.

[0010] Furthermore, the pitch drive mechanism is located in the middle of the pair of swing drive mechanisms along the arrangement direction.

[0011] Furthermore, the segment support mechanism also includes an inclined support for connecting the bracket and the overturning structure, the inclined support having a thin-walled support area for mounting the rotary drive mechanism and a thick-walled support area for rotatably connecting with the overturning structure.

[0012] Furthermore, the bracket includes at least two parallel crossbeams, a fixing frame connected between the crossbeams, and several fasteners provided on the crossbeams and / or the fixing frame for fixing the segments.

[0013] Furthermore, the segment support mechanism also includes multiple buffer modules disposed on the crossbeam, the buffer modules being used to directly support and contact the segments.

[0014] Furthermore, the buffer module includes a roller, a mounting base rotatably connected to the crossbeam, and a connecting shaft for connecting the roller to the mounting base, wherein at least a portion of the outer edge of the roller protrudes from the upper surface of the crossbeam for directly supporting the support plate.

[0015] Furthermore, the buffer module also includes a rotating shaft for rotating the mounting base between the crossbeams, the mounting base being able to rotate about the axis of the rotating shaft, and the axis of the connecting shaft being perpendicular or approximately perpendicular to the axis of the rotating shaft.

[0016] Furthermore, the segment support mechanism also includes a height adjustment component fixed to the crossbeam and a support plate fixed to the lower end of the height adjustment component. The support plate is perpendicular to the plane of the crossbeam. The height adjustment component includes an adjustment column, a sleeve that telescopically cooperates with the adjustment column, and a locking member for fixing the relative telescopic position. The adjustment column is fixed to the support plate or the crossbeam.

[0017] Compared with related technologies, the beneficial effects of this application are as follows: The segment lifting device for tunnel repair of this application, through the universal joint linkage of the rotary drive mechanism, the swing drive mechanism and the pitch drive mechanism, makes the lifting device compact in structure and highly automated. It can adjust the angle of the segment bearing mechanism in multiple dimensions and with precision, and can quickly carry out operations in the tunnel, greatly shortening the time of a single repair operation, thereby reducing interference with tunnel traffic or operation. Moreover, its high-precision positioning capability ensures the assembly quality of new segments, the tunnel repair effect is reliable, reduces manual construction, and reduces construction safety hazards. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the gripping device of one embodiment of the segment gripping device for tunnel repair in this application.

[0019] Figure 2 yes Figure 1 Enlarged view of the local structure at point A in the middle.

[0020] Figure 3 yes Figure 1 A three-dimensional structural diagram of the grabbing device from another angle.

[0021] Figure 4 yes Figure 1 A three-dimensional structural diagram of the central bracket at one angle.

[0022] Figure 5 yes Figure 4 A three-dimensional structural diagram of the middle bracket from another angle.

[0023] Figure 6 yes Figure 1 A three-dimensional structural diagram of the universal joint.

[0024] Among them, 1-grabbing device, 10-telescopic arm, 20-universal joint, 21-body, 22-first hinge end, 23-second hinge end, 24-third hinge end, 25-fourth hinge end, 26-bore, 27-connecting arm, 30-segment bearing mechanism, 31-bracket, 311-crossbeam, 312-fixed frame, 313-installation component, 314-fastener, 32-overturning structure, 33-slanted support, 331-thin-wall support area, 332-rear wall support area, 34-buffer module, 341-roller, 342-mounting base, 343-connecting shaft, 344-rotating shaft, 35-height adjustment component, 351-adjusting column, 352-sleeve, 36-plate, 40-rotation drive mechanism, 41-drive motor, 42-large gear, 50-swing drive mechanism, 60-pitch drive mechanism, 2-segment. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this application.

[0026] It should be noted that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the purpose of simplifying the description of this application and do not indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this application. Specifically, in this application, the direction facing the ground is referred to as "lower," and conversely, the direction away from the ground is referred to as "upper." Other descriptions of orientation are defined based on "upper" and "lower."

[0027] In the various figures of this application, for ease of illustration, certain dimensions of structures or parts may be exaggerated relative to other structural parts; therefore, they are only used to illustrate the basic structure of the subject matter of this application.

[0028] This application provides a segment grabbing device 1 for tunnel repair, which is used to grab precast concrete segments 2. It can accurately grab and position segments with multiple degrees of freedom in the limited space of the tunnel to adapt to different tunnel defects, thereby improving construction efficiency and construction safety.

[0029] like Figures 1 to 3As shown, the lifting device 1 includes a telescopic arm 10, a universal joint 20, a segment support mechanism 30, a rotary drive mechanism 40, a swing drive mechanism 50, and a pitch drive mechanism 60. Through the coordinated operation of these mechanisms, the pre-installation position of the segment 2 can be precisely controlled, thereby achieving the purpose of accurately and quickly repairing tunnel defects.

[0030] The telescopic arm 10 is used to support other components. The telescopic arm 10 is telescopic and its length can be adjusted according to the repair position to adjust the height of the segment 2.

[0031] The universal joint 20 connects the telescopic arm 10 and the segment support mechanism 30 through the rotation drive mechanism 40, the swing drive mechanism 50 and the pitch drive mechanism 60, so that the segment support mechanism 30 can be adjusted in multiple degrees of freedom to achieve the purpose of accurately installing the segment 2.

[0032] Among them, such as Figure 4 As shown, the universal joint 20 has a body 21 and a pair of first hinge ends 22 disposed on the body 21 and hinged to the segment support mechanism 30. The first hinge ends 22 are located at the upper end of the universal joint 20. The universal joint 20 drives the segment support mechanism 30 to rotate about the straight line where the pair of first hinge ends 22 are located as the axis, thereby adjusting the angle of the segments on the segment support mechanism 30.

[0033] The universal joint 20 has a pair of second hinge ends 23 that are hinged to the end of the telescopic arm 10. The second hinge ends 23 are symmetrically arranged on the lower side of the universal joint 20 and are used to adjust the angle of the universal joint 20 relative to the axial direction of the telescopic arm 10.

[0034] The universal joint 20 has a pair of third hinge ends 24 that are hinged to the swing drive mechanism 50, and the third hinge ends 24 are located opposite to the front side of the second hinge end 23.

[0035] To facilitate the installation of the swing drive mechanism 50, the universal joint 20 also includes a connecting arm 27 that connects the body 21 and the third hinge end 24. The connecting arm 27 extends outward and downward from the body 21, that is, there is a certain distance between the swing drive mechanism 50 and the body 21, providing a certain space for the swing drive mechanism 50 to adjust the universal joint 20 and avoiding interference.

[0036] In this application, the third hinge end 24 is provided with a boss 26, which on the one hand facilitates the provision of machining allowance and improves machining accuracy; on the other hand, it can avoid the risk of interference between the swing drive mechanism 50 and the connecting arm 27.

[0037] like Figure 1 and Figure 2As shown, the segment support mechanism 30 includes a bracket 31 for supporting the segment 2 and an overturning structure 32 hinged to the universal joint 20. The overturning structure 32 is hinged to the universal joint 20 through a first hinge end 22.

[0038] like Figure 2 As shown, the overturning structure 32 is a planar extended plate-like structure. On the one hand, it can support the bracket 31, and on the other hand, it is indirectly hinged to the rotary drive mechanism 40, the swing drive mechanism 50 and the pitch drive mechanism 60 through the universal joint 20. That is, the rotary drive mechanism 40, the swing drive mechanism 50 and the pitch drive mechanism 60 are hinged to the universal joint 20 and / or the overturning structure 32, thereby achieving the purpose of indirectly adjusting the angle of the tube segment 2 on the bracket 31.

[0039] like Figure 5 and Figure 6 As shown, the bracket 31 includes at least two parallel crossbeams 311, a fixing frame 312 connected between the crossbeams 311, and a number of fixing members provided on the crossbeams 311 and / or the fixing frame 312 for fixing the pipe segments, and the pipe segments are fixed on the crossbeams 311 by the fixing members.

[0040] The length of the crossbeam 311 is not less than the length of the fixing frame 312. When fixing the tube segment 2, the length direction of the tube segment 2 is along the extension direction of the crossbeam 311.

[0041] like Figure 6 As shown, the fixing bracket 312 is located on the back of the crossbeam 311 away from the tube segment 2, and is used to fix the crossbeam 311 without affecting the contact between the crossbeam 311 and the tube segment.

[0042] The fasteners include mounting members 313 for fixing the tube segment 2 and fasteners 314 for balancing the force on the tube segment 2 along the thickness direction. The mounting members 313 pass through the reserved holes on the tube segment 2 so that the tube segment 2 is subjected to an external force toward the bracket 31. This external force is used to fix the tube segment 2 to the bracket 31.

[0043] The fastener 314 is provided on the fixing frame 312. The fastener 314 is located on the inner side of the mounting member 313. Since the extension direction of the tube segment 2 is arc-shaped, there is a distance between the fastener 314 located in the middle position of the tube segment 2 and the tube segment 2. The fastener 314 is screwed in towards the tube segment 2 to abut against the inner side of the tube segment 2. The fastener 314 applies an external force to the tube segment 2 away from the bracket 31 to prevent the tube segment 2 from being subjected to unbalanced stress and breaking.

[0044] As a preferred embodiment of this application, such as Figure 1 and Figure 2As shown, the segment support mechanism 30 also includes an inclined support 33 for connecting the bracket 31 and the overturning structure 32. Along the length of the crossbeam 311, the thickness of the inclined support 33 gradually decreases or increases. The inclined support 33 has a horizontal end that mates with the overturning structure 32 and an inclined end that mates with the crossbeam 311 of the bracket 31. By providing the inclined end, the bracket 31 already has a preliminary angle suitable for easy installation in its initial state. The inclined support 33 has several spaced reinforcing ribs near the horizontal section and the inclined end to increase the structural strength of the inclined support 33.

[0045] Specifically, the inclined support 33 has a thin-walled support area 331 for mounting the rotary drive mechanism 40 and a thick-walled support area 332 for rotatably connecting with the overturning structure 32. The arrangement of the rotary drive mechanism 40 and the overturning structure 32 facilitates the rotary drive mechanism 40 to drive the inclined support 33 to rotate the bracket 31, while not affecting the connection strength between the overturning structure 32 and the universal joint 20.

[0046] As another preferred embodiment of this application, such as Figure 5 and Figure 6 As shown, the segment support mechanism 30 also includes a plurality of buffer modules 34 disposed on the crossbeam 311. The buffer modules 34 are located at the ends of the crossbeam 311 along the length direction and are used to directly support and contact the segment 2.

[0047] The buffer module 34 includes a roller 341, a mounting base 342 rotatably connected to the crossbeam 311, and a connecting shaft 343 for connecting the roller 341 to the mounting base 342. At least a portion of the outer edge of the roller 341 protrudes from the upper surface of the crossbeam 311 to directly support the support plate 2.

[0048] The buffer module 34 further includes a rotating shaft 344 for rotating the mounting base 342 between the crossbeams 311. The mounting base 342 is rotatable about the axis of the rotating shaft 344. The axis of the connecting shaft 343 is perpendicular or approximately perpendicular to the axis of the rotating shaft 344, so that the buffer module 34 can rotate freely to accommodate various sizes of pipe segments 2.

[0049] Since the buffer module 34 is in direct contact with the segment 2, the mounting component 313 described in this application is located on the mounting base 342, which facilitates the fixed engagement of the mounting component 313 with the segment.

[0050] The roller 341 is made of polyurethane material, which further alleviates the rigid contact between the segment 2 and the crossbeam 311 when the roller 341 contacts the segment 2.

[0051] The segment support mechanism 30 also includes a height adjustment component 35 fixed on the crossbeam 311 and a support plate 36 fixed at the lower end of the height adjustment component 35. The support plate 36 is arranged perpendicular to the plane where the crossbeam 311 is located. When lifting the segment 2, the support plate 36 can conveniently support the side of the segment 2.

[0052] Specifically, the height adjustment component 35 includes an adjustment column 351, a sleeve 352 that telescopically cooperates with the adjustment column 351, and a locking member for fixing the relative telescopic position. The height adjustment component 35 is used to adjust the distance between the support plate 36 and the crossbeam 311, and is used to accommodate tube segments 2 of different widths, further improving the adaptability of the lifting device 1 to different tube segments 2.

[0053] The adjusting column 351 is fixed to the support plate 36 or the crossbeam 311. The adjusting column 351 is fixed to the crossbeam 311 or the support plate 36, which can achieve the purpose of adjusting the distance between the support plate 36 and the crossbeam 311.

[0054] like Figures 1 to 3 As shown, the rotary drive mechanism 40 is disposed on the overturning structure 32 and is used to drive the bracket 31 to rotate around the Z-axis. In this application, the rotary drive mechanism 40 indirectly drives the bracket 31 to rotate by driving the inclined support 33, which is used to adjust the direction of the tube segment 2.

[0055] The rotary drive mechanism 40 includes a drive motor 41 disposed on the overturning structure 32 and a gear transmission assembly driven by the drive motor 41. The gear transmission assembly is connected to the bracket 31 to drive its rotation.

[0056] The transmission assembly includes a small gear ring that cooperates with the drive motor 41 and a large gear 42 that meshes with the small gear ring. The large gear 42 is fixed on the bracket 31 and drives the tube segment 2 to rotate through the bracket 31.

[0057] In the embodiment where the segment support mechanism 30 includes an inclined support 33, the large gear 42 is fixed to the thin-walled support area 331 of the inclined support 33, and is indirectly fixed to the bracket 31 through the thin-walled support area 331.

[0058] In this application, the plane where the overturning structure 32 is located is defined as the plane where the X-axis and Y-axis intersect perpendicularly, and the Z-axis is perpendicular to the plane where the overturning structure 32 is located. That is, the rotation drive mechanism 40 drives the bracket 31 to rotate relative to the plane where the overturning structure 32 is located.

[0059] The swing drive mechanism 50 is symmetrically arranged on both sides of the universal joint 20 along the X-axis. One end of the swing drive mechanism 50 is hinged to the third hinge end 24 of the universal joint 20, and the other end is hinged to the overturning structure 32, for driving the overturning structure 32 to swing along the Y-axis. In this application, the Y-axis is along the width direction of the segment 2. When the swing drive mechanism 50 drives the overturning structure 32, the swing drive mechanism 50 indirectly drives the long end of the segment on the bracket 31 to rotate within a certain angle range.

[0060] like Figure 2 As shown, a pair of swing drive mechanisms 50 are hydraulic cylinders. The cylinder body end of each hydraulic cylinder is hinged to the third hinge end 24 of the universal joint 20, and the piston rod end is hinged to the lower end of the overturning structure 32. The two hydraulic cylinders are configured to perform differential extension and retraction to adjust the tilt of the overturning structure 32 along the Y-axis.

[0061] It is understood that the swing drive cylinder 50 can also be a rotatable arc rack (or sector gear) set on the universal joint, and two independent drive motors drive the rack from both sides through small gears. The forward and reverse rotation of the motors controls the swing direction, thus achieving the purpose of driving the overturning structure 32 to swing left and right.

[0062] One end of the pitch drive mechanism 60 is hinged to the fourth hinge end 25 of the universal joint 20, and the other end is fixed to the telescopic arm 10. It is used to drive the universal joint 20 to swing around the X-axis, so as to drive the overturning structure 32 to swing around the X-axis. That is, the pitch drive mechanism 60 adjusts the tilt of the overturning structure 32 in the front-back direction, thereby driving the tube segment 2 on the bracket 31 to adjust the tilt of the tube segment 2 in the front-back direction.

[0063] The pitch drive mechanism 60 is a pitch hydraulic cylinder, wherein the cylinder body end of the pitch hydraulic cylinder is fixedly connected to the telescopic arm 10, and the piston rod end of the pitch hydraulic cylinder is hinged to the fourth hinge end 25 of the universal joint 20.

[0064] It is understood that the pitch drive cylinder 60 can also be an electric push rod, servo cylinder drive or other drive device with the same function, which is also within the protection scope of this application.

[0065] like Figure 2As shown, the pitch drive mechanism 60 is located in the middle of the pair of swing drive mechanisms 50 along the arrangement direction. The pitch drive mechanism 60 and the swing drive mechanism 50 can be compactly integrated in one area at the universal joint 20. The symmetrical layout allows the driving force of the pitch movement to act directly on the center of the adjustment plane, reducing additional torque. When performing pitch movement, it can minimize the generation of harmful lateral torque or torsional stress on the hinge point of the universal joint 20 and the overturning structure 32, making the movement smoother. At the same time, the gravity load and working load from the segment 2 can be more evenly transmitted to the telescopic boom 10 through this symmetrical structure, improving the rigidity and fatigue life of the overall structure.

[0066] In summary, the segment lifting device 1 for tunnel repair of this application, through the linkage of the universal joint 20 with the rotary drive mechanism 40, the swing drive mechanism 50 and the pitch drive mechanism 60, makes the lifting device 1 compact in structure and highly automated. It can adjust the angle of the segment carrying mechanism 30 in multiple dimensions and with precision, and can quickly carry out operations in the tunnel, greatly shortening the time of a single repair operation, thereby reducing interference with tunnel traffic or operation. Moreover, its high-precision positioning capability ensures the assembly quality of new segments, the tunnel repair effect is reliable, reduces manual construction, and reduces construction safety hazards.

[0067] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0068] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of this application and are not intended to limit the scope of protection of this application. All equivalent embodiments or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A segment lifting device for tunnel repair, characterized in that, The grabbing device includes: Telescopic boom; A universal joint, which is hinged to the end of the telescopic arm. The segment support mechanism includes a bracket for supporting the segment and an overturning structure hinged to the universal joint; A rotary drive mechanism is disposed on the overturning structure and is used to drive the bracket to rotate around the Z-axis, which is perpendicular to the plane of the overturning structure. A pair of symmetrically arranged swing drive mechanisms, one end of which is hinged to the universal joint and the other end of which is hinged to the overturning structure, are used to drive the overturning structure to swing along the Y-axis; A pitch drive mechanism, one end of which is hinged to a universal joint and the other end of which is fixed to the telescopic arm, is used to drive the universal joint to swing around the X-axis, thereby causing the overturning structure to swing around the X-axis. The Y-axis and X-axis are both perpendicular to the Z-axis.

2. The segment lifting device for tunnel repair as described in claim 1, characterized in that, The rotation drive mechanism includes a drive motor mounted on the overturning structure and a gear transmission assembly driven by the drive motor. The gear transmission assembly is connected to the bracket to drive its rotation.

3. The segment lifting device for tunnel repair as described in claim 1, characterized in that, The pair of swing drive mechanisms are hydraulic cylinders. The cylinder body end of each hydraulic cylinder is hinged to the lower part of the universal joint, and the piston rod end is hinged to the lower end of the overturning structure. The two hydraulic cylinders are configured to perform differential extension and retraction.

4. The segment lifting device for tunnel repair as described in claim 1, characterized in that, The pitch drive mechanism is located in the middle of the pair of swing drive mechanisms along the arrangement direction.

5. The segment lifting device for tunnel repair as described in any one of claims 1 to 4, characterized in that, The segment support mechanism further includes an inclined support for connecting the bracket and the overturning structure. The inclined support has a thin-walled support area for mounting the rotary drive mechanism and a thick-walled support area for rotatably connecting with the overturning structure.

6. The segment lifting device for tunnel repair as described in claim 5, characterized in that, The bracket includes at least two parallel crossbeams, a fixing frame connected between the crossbeams, and several fasteners provided on the crossbeams and / or the fixing frame for fixing the segments.

7. The segment lifting device for tunnel repair as described in claim 6, characterized in that, The segment support mechanism also includes multiple buffer modules disposed on the crossbeam, the buffer modules being used to directly support and contact the segments.

8. The segment lifting device for tunnel repair as described in claim 7, characterized in that, The buffer module includes a roller, a mounting base rotatably connected to the crossbeam, and a connecting shaft for connecting the roller to the mounting base. At least a portion of the outer edge of the roller protrudes from the upper surface of the crossbeam to directly support the support plate.

9. The segment lifting device for tunnel repair as described in claim 8, characterized in that, The buffer module further includes a rotating shaft for rotating the mounting base between the crossbeams. The mounting base is rotatable about the axis of the rotating shaft, and the axis of the connecting shaft is perpendicular or approximately perpendicular to the axis of the rotating shaft.

10. The segment lifting device for tunnel repair as described in claim 6, characterized in that, The segment support mechanism further includes a height adjustment component fixed to the crossbeam and a support plate fixed to the lower end of the height adjustment component. The support plate is perpendicular to the plane of the crossbeam. The height adjustment component includes an adjustment column, a sleeve that telescopically cooperates with the adjustment column, and a locking member for fixing the relative telescopic position. The adjustment column is fixed to the support plate or the crossbeam.

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