Tunnel repairing rack

Abstract

The utility model discloses a tunnel repairing rack which comprises a support assembly, a distance adjusting mechanism, an inserting plate, a vertical lifting mechanism, a repairing table and a sliding plate assembly. The support assembly comprises two lower supports, and the distance adjusting mechanism and the inserting plate are assembled between the two lower supports. The multiple sliding plate assemblies are assembled on the two lower supports in a sliding mode, and the repairing table is connected with the sliding plate assemblies through a vertical lifting mechanism. The structure is stable, operation is flexible, and efficient and safe repairing work can be conducted on tunnels with different widths and different heights; the distance adjusting mechanism adjusts the distance between the two lower supports according to the width of the tunnel. After the distance is adjusted, the insertion plate is used for enhancing the connection stability between the two lower brackets; the height of the repairing table can be adjusted through the vertical lifting mechanism, so that the repairing table can meet the repairing requirements of different heights; the sliding plate assembly can enable the repairing table to slide along the lower support in the tunnel, and the repairing table can conduct repairing work at different positions conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel repairing stand. Background Art

[0002] In the construction process of tunnel engineering, the construction of secondary lining is a crucial link. The secondary lining is not only related to the structural stability of the tunnel, but also directly affects the service life and safety of the tunnel. Therefore, after the pouring of the secondary lining concrete is completed, a series of meticulous follow-up work is required, such as grinding the staggered platform and repairing the honeycomb surface, to ensure the overall quality and aesthetics of the tunnel.

[0003] The completion of these follow-up tasks requires workers to stand on the secondary lining repair bench to operate. However, the currently commonly used secondary lining repair bench has a fixed size design, which makes it difficult for workers to reach certain areas when performing high-altitude operations. This undoubtedly increases the difficulty of construction and may bring potential safety risks. At the same time, when the bench needs to be moved to the next construction area, due to its large size, it is easy to collide with the secondary lining surface or the pipelines attached to its surface, which may not only cause damage to the secondary lining structure, but also cause damage to the pipelines, resulting in additional economic losses and safety hazards. More importantly, the sizes of different tunnel projects or different sections of the same tunnel are often different. This difference makes the traditional fixed-size secondary lining repair bench unable to meet the diverse construction needs, limiting its versatility and flexibility.

[0004] In the "An Adjustable Tunnel Second Lining Repair Bench" disclosed in publication number CN206903666U, multiple guardrails are set on the bench, resulting in a significant increase in the overall volume of the bench. Although the bench is adjustable, its overall structure becomes relatively bulky after adding these safety facilities. In a tunnel construction environment, especially in narrow or complex terrain tunnels, the movement and positioning of such large equipment is particularly difficult. Workers may need to use additional machinery or manpower to move this huge bench, which not only increases the difficulty of construction, but also affects work efficiency. Summary of the invention

[0005] In order to overcome the above defects in the prior art, a repair stand with a stable structure and suitable for different tunnels is provided.

[0006] The technical solution of the utility model is as follows: a tunnel repair stand, including a bracket assembly, a distance adjustment mechanism, a plug plate, a vertical lifting mechanism, a repair platform and a slide plate assembly; the bracket assembly includes two lower brackets, the distance adjustment mechanism and the plug plate are respectively assembled between the two lower brackets; a plurality of slide plate assemblies are provided, and the plurality of slide plate assemblies are slidably assembled on the two lower brackets, and the repair platform is connected to the slide plate assembly through the vertical lifting mechanism.

[0007] Preferably, the inner cavity of the lower bracket is equipped with an airbag, the bottom of the lower bracket is provided with an air outlet groove, the air outlet groove is provided with a plurality of air outlet holes, the airbag is placed on the top of the plurality of air outlet holes, and the bottom of the airbag is provided with a plurality of overflow holes connected with the plurality of air outlet holes.

[0008] Preferably, blocking doors are provided on the sides of the two lower brackets, and a first rotating shaft is provided between the lower brackets and the blocking doors; an iron sheet is provided on the lower bracket, and a permanent magnet that is magnetically attracted to the iron sheet is provided on the blocking door.

[0009] Preferably, the distance adjustment mechanism includes a clockwise threaded rod, a center knob and a counterclockwise threaded rod; both ends of the center knob are connected to the clockwise threaded rod and the counterclockwise threaded rod, and the clockwise threaded rod and the counterclockwise threaded rod are respectively screwed to the two lower brackets.

[0010] Preferably, the plug board includes a plug board body and side plug boards provided on both sides of the plug board body, and a slot for embedding the side plug boards is provided on the upper surface of the lower bracket.

[0011] Preferably, an inner plug hole is provided on the side plug plate, a fixing groove connected to the inner plug hole is provided on the side wall of the lower bracket, and the connected inner plug hole and fixing groove are equipped with a fixing component for connecting the side plug plate and the lower bracket.

[0012] Preferably, the fixing assembly includes a limit plate, a latch, a sliding block and a flexible spring; the end of the latch passes through the fixing slot and is inserted into the inner hole, the fixing slot includes a mounting slot, a guide hole and a guide slot; the guide slot and the mounting slot are connected through the guide hole; the end of the latch is connected to the limit plate, and the sliding block and the flexible spring are sleeved on the latch in the guide slot.

[0013] Preferably, the vertical lifting mechanism includes a main electric cylinder, a supporting electric cylinder and a clamp; a first telescopic rod is installed at one end of the main electric cylinder, and the clamp is sleeved on the main electric cylinder; a second rotating shaft is installed on the clamp, and the second telescopic rod of the supporting electric cylinder is rotatably connected to the second rotating shaft.

[0014] Preferably, a sliding groove is provided on the upper surface of the lower bracket, and the slide plate assembly is slidably connected to the lower bracket via the sliding groove. The slide plate assembly includes a sliding block rotatably connected to the main electric cylinder and an adjusting plate rotatably connected to the supporting electric cylinder.

[0015] Preferably, the repair platform includes a base plate and a fence installed around the base plate, and a hinged seat connected to the first telescopic rod is provided at the bottom of the base plate.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] A tunnel repair stand has a stable structure and flexible operation, and can realize efficient and safe repair work on tunnels of different widths and heights; wherein, a distance adjustment mechanism adjusts the distance between two lower supports according to the width of the tunnel, so as to facilitate the construction of the repair stand; after the distance is adjusted, a plug plate is used to enhance the connection stability between the two lower supports; the height of the repair stand can be adjusted by a vertical lifting mechanism to adapt to the repair needs of different heights; a slide plate assembly can make the repair stand slide along the lower support in the tunnel, so as to facilitate the repair work of the repair stand at different positions.

[0018] Furthermore, the assembly of the airbag effectively prevents injuries caused by accidental falls of workers, making the repair work safer and more reliable; the airbag provides additional stability and adaptability for the lower bracket. When the airbag is inflated, it can increase the friction between the lower bracket and the bottom surface of the tunnel to prevent the stand from sliding during the repair process; at the same time, the airbag can also adapt to the unevenness of the bottom surface of the tunnel to ensure that the stand is placed stably.

[0019] Furthermore, the magnetic attraction design enables the blocking door to automatically align and fit tightly when closed, improving the convenience and sealing of operation. The blocking door and the lower bracket are tightly closed by the iron sheet and the permanent magnet. The first rotating shaft is used to connect the lower bracket and the blocking door, which facilitates the opening and closing of the blocking door.

[0020] Furthermore, the distance adjustment mechanism can conveniently control the distance between the two lower brackets by rotating the center knob, thereby simplifying the steps of installing the repair stand and improving efficiency.

[0021] Furthermore, by inserting the side plug-in plate into the slot of the lower bracket, the plug-in plate can be firmly fixed on the lower bracket, so that the repair stand is not easy to shake or shift, thereby improving the stability and fixity of the entire structure. The side plug-in plate and the slot make the installation and removal of the plug-in plate simple and quick; just align the side plug-in plate with the slot and gently push it in to complete the installation of the plug-in plate; improve work efficiency and facilitate subsequent maintenance and replacement.

[0022] Furthermore, the inner plug hole and the fixing hole allow the fixing piece to pass through the two holes to firmly fix the side plug plate on the lower bracket; this connection method can effectively prevent the side plug plate from loosening or falling off during use, thereby improving the stability and reliability of the entire structure.

[0023] Furthermore, the fixing component inserts or removes the pin by operating the limit plate, thereby fixing or removing the side plug-in plate. The sliding block and the flexible spring sleeve are arranged on the pin to provide elastic force or damping, and slide smoothly in the guide groove, thereby increasing the stability of the side plug-in plate installation, avoiding the tedious installation of screws, and simplifying the installation steps.

[0024] Furthermore, the main electric cylinder drives the first telescopic rod to extend and retract, and the supporting electric cylinder drives the second telescopic rod to extend and retract, and the height of the vertical lifting mechanism is directly adjusted by the first telescopic rod and the second telescopic rod; the angles of the main electric cylinder and the supporting electric cylinder are adjusted by the clamp and the second rotating shaft, and the height of the vertical lifting mechanism is indirectly adjusted, thereby fine-tuning the height of the repair table.

[0025] Furthermore, the sliding groove ensures that the slide plate assembly can slide smoothly inside it, maintains sufficient stability, and prevents shaking or deviation during movement; the slider is connected to the main electric cylinder, and the adjustment plate is connected to the supporting electric cylinder. By adjusting the position of the slider and the adjustment plate, the position and height of the repair platform can be adjusted to adapt to tunnels of different sizes.

[0026] Furthermore, fences are installed around the bottom plate to increase the safety of the repair platform and prevent objects or tools from slipping during work. A hinged seat connected to the first telescopic rod is provided at the bottom of the bottom plate to facilitate the connection of the repair platform with the vertical lifting mechanism, ensuring the stability and accuracy of the movement.

[0027] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model is further described below in conjunction with the accompanying drawings:

[0029] Figure 1 It is a structural schematic diagram of the first use state of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the second use state of the present invention;

[0031] Figure 3 is a top view of the bracket assembly;

[0032] Figure 4 This is a schematic diagram of the installation of the lower bracket and the blocking door;

[0033] Figure 5 for Figure 4 A schematic diagram of the local section at point A;

[0034] Figure 6 This is a schematic diagram of the installation of the lower bracket and the side door;

[0035] Figure 7 for Figure 1 A partial enlarged view of point B in the middle;

[0036] Figure 8 for Figure 2 Schematic diagram of the cross-sectional structure at C in the middle;

[0037] The following are the descriptions of the reference numerals:

[0038] Bracket assembly 1, distance adjustment mechanism 2, plug board 3, vertical lifting mechanism 4, repair platform 5, sliding groove 6, fixing groove 7, slide plate assembly 8, fixing assembly 9, lower bracket 11, inflatable cushion 12, blocking door 13, air bag 14, side baffle 15, air outlet groove 111, air outlet hole 112, overflow hole 141, first rotating shaft 131, iron sheet 133, permanent magnet 132, clockwise threaded rod 21, center knob 22, counterclockwise threaded rod 23, plug board Body 31, side plug plate 32, slot 113, inner plug hole 321, main electric cylinder 41, supporting electric cylinder 42, clamp 43, tightening knob 44, first telescopic rod 411, second telescopic rod 421, second rotating shaft 431, slider 81, adjustment plate 82, bottom plate 51, fence 52, hinge seat 53, ball screw 61, mounting groove 71, guide hole 72, guide groove 73, limit plate 91, latch 92, sliding block 93, flexible spring 94. DETAILED DESCRIPTION

[0039] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0040] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0041] like Figures 1 to 8 As shown, a tunnel repair stand comprises a support assembly 1, a distance adjustment mechanism 2, a plug plate 3, a vertical lifting mechanism 4, a repair platform 5 and a slide assembly 8; the support assembly 1 comprises two lower supports 11, the distance adjustment mechanism 2 and the plug plate 3 are respectively assembled between the two lower supports 11; there are a plurality of slide assemblies 8, and the plurality of slide assemblies 8 are slidably assembled on the two lower supports 11, and the repair platform 5 is connected to the slide assembly 8 through the vertical lifting mechanism 4. The height and width of the repair stand are adjusted by the distance adjustment mechanism 2 and the vertical lifting mechanism 4, so that the whole stand structure is flexible and changeable, and each component is easy to assemble and disassemble, which can meet the needs of tunnel repairs of different sizes and shapes, and improve the efficiency and flexibility of the repair operation.

[0042] like Figure 4 and Figure 5As shown, the inner cavity of the lower bracket 11 is equipped with an air bag 14, an air outlet groove 111 is formed at the bottom of the lower bracket 11, a plurality of air outlet holes 112 are arranged on the top of the air outlet holes 112, the air bag 14 is installed on the top of the air outlet holes 112, an overflow hole 141 is arranged at the bottom of the air bag 14, the overflow hole 141 is connected to the air outlet holes 112, and the air bag 14 has an inflation port connected to a high-pressure air pump. This design can form a soft safety air cushion under the bracket assembly 1, effectively preventing injuries caused by accidental falls of tools or personnel, and improving the safety of operations.

[0043] Furthermore, the lower bracket 11 is provided with a first rotating shaft 131 on both sides, and the first rotating shaft 131 is rotatably connected to the blocking door 13. An inflatable cushion 12 is placed in the lower bracket 11, and the inflatable cushion 12 can cover the upper side of the blocking door 13 after being inflated. Such a structure can provide additional safety protection for the workers to prevent accidental falls without affecting the repair work. Figure 6 As shown, side baffles 15 are also provided on the front and rear sides of the lower bracket 11, and inflatable cushions 12 are also placed accordingly. This design increases safety protection all around, making the staff feel more at ease during the repair process.

[0044] like Figure 7 As shown, a permanent magnet 132 is provided on the blocking door 13, and in cooperation with it, an iron sheet 133 is provided on the lower bracket, and the permanent magnet and the iron sheet cooperate to enable the blocking door 13 to be magnetically attracted to the lower bracket 11 under the action of magnetic force. The design of the blocking door 13 using magnetic attraction makes the door opening and closing more convenient and quick, and also enhances safety.

[0045] like Figure 3 As shown, the distance adjustment mechanism 2 includes a clockwise threaded rod 21, a counterclockwise threaded rod 23 and a central knob 22. The clockwise threaded rod 21 and the counterclockwise threaded rod 23 are fixedly connected to both sides of the central knob 22. The clockwise threaded rod 21 and the counterclockwise threaded rod 23 are respectively threadedly connected to the two lower brackets 11. The rotation of the central knob 22 can make the two lower brackets 11 move closer to or farther from each other. This distance adjustment mechanism 2 is exquisitely designed and easy to operate, and can quickly adapt to the needs of tunnel repairs of different widths.

[0046] like Figure 8As shown, the lower bracket 11 is provided with a slot 113, and in coordination therewith, the upper plug plate 3 includes a plug plate body 31, and side plug plates 32 are provided on both sides of the plug plate body 31, and the side plug plates 32 are embedded in the slot 113; and an inner plug hole 321 is provided on the side plug plate 32, and a fixing groove 7 connected to the inner plug hole 321 is provided on the side wall of the lower bracket 11, and the fixing groove 7 includes a mounting groove 71, a guide hole 72 and a guide groove 73; the center of the mounting groove 71 and the center of the guide groove 73 are connected through the guide hole 72, and a sliding block 93 is slidably installed in the guide groove 73, and the sliding block 93 and a flexible spring 94 are sleeved on the pin 92 in the guide groove 73, and the end of the pin 92 is fixedly assembled with a limit plate 91, and a flexible spring 94 is provided between the right end of the sliding block 93 and the left end of the guide groove 73, and the flexible spring 94 can enable the end of the pin 74 to pass through the guide hole 72 and then be inserted into the inner plug hole 321.

[0047] In at least one embodiment, the vertical lifting mechanism 4 includes a plurality of main electric cylinders 41 and supporting electric cylinders 42, one end of the main electric cylinder 41 is equipped with a first telescopic rod 411, and the supporting electric cylinder 42 is provided with a second telescopic rod 421; the main electric cylinder 41 and the second telescopic rod 421 are rotatably connected, a clamp 43 is sleeved on the cylinder body of the main electric cylinder 41, a first rotating shaft 431 is installed on the clamp 43, and the second telescopic rod 421 of the supporting electric cylinder 42 is rotatably connected to the first rotating shaft 431.

[0048] Furthermore, a sliding groove 6 is provided on the upper surface of the lower bracket 11, and the slide plate assembly 8 is slidably connected to the lower bracket 11 through the sliding groove 6. The slide plate assembly 8 includes a slider 81 rotatably connected to the main electric cylinder 41 and an adjustment plate 82 rotatably connected to the supporting electric cylinder 42; a ball screw 61 is rotatably connected in the sliding groove 6, a thread sleeve matching the ball screw 61 is provided at the bottom of the slider 81, and a driving motor is connected to the end of the ball screw 61, and the driving motor can drive the slider 81 to move along the sliding groove 6. The slider 81 is rotatably connected to the main electric cylinder 41, and the first telescopic rods 411 provided on the multiple main electric cylinders 41 are rotatably connected to the hinge seat 53 provided at the bottom of the repair platform 5. This vertical lifting mechanism is flexible in design and can not only realize the height adjustment of the repair platform, but also ensure its stability and convenience of operation.

[0049] Furthermore, a tightening knob 44 is threadedly connected to the slider 81 , and the tightening knob 44 can position the slider 81 at a position on the sliding groove 6 , ensuring that the slider 81 remains stable, making the entire device more stable.

[0050] like Figure 1 As shown, when the two adjustment plates 82 are between the two sliders 81, the multiple main electric cylinders 41 and the repair platform 5 are trapezoidal, which is more stable and can be conveniently raised in vertical height. Figure 2As shown, when the two adjustment plates 82 are both on the left or right side of the slider 81, the horizontal distance between the two main electric cylinders 41 is equal to the length of the repair platform 5, forming a parallelogram structure, which can conveniently adjust the horizontal position and vertical height, but the stability deviation.

[0051] In at least one embodiment, the repair platform 5 includes a bottom plate 51, a fence 52 is arranged around the bottom plate, and a hinge seat 53 is arranged at the bottom of the bottom plate 51 and is rotatably connected to the first telescopic rod 411. The repair platform 5 is reasonably designed, and the fence 52 around it provides additional safety protection. At the same time, the rotation connection with the main electric cylinder 41 also ensures the flexibility and stability of the repair platform.

[0052] Working steps: Place the two lower brackets 11 at the location of the tunnel to be repaired, and adjust the distance between the two lower brackets by the center knob 22, the clockwise threaded rod 21 and the counterclockwise threaded rod 23 according to actual needs. Use the plug plate body 31 and the side plug plate 32 to insert the plug plate 3 into the slot 113 of the lower bracket 11, and ensure that the pin 74 is inserted into the inner plug hole 321 under the action of the flexible spring 76 to fix the plug plate 3. Check and ensure that the safety facilities such as the blocking door 13, the side blocking door 15, the inflatable cushion 12, and the airbag 14 are intact and in the appropriate position. Connect the high-pressure air pump to inflate the airbag and the inflatable cushion to ensure that they are in working condition.

[0053] According to the needs of repair, the ball screw 61 is driven by the driving motor to rotate, thereby driving the slider 81 to move along the sliding groove 6 to adjust the horizontal position of the repair platform 5. The vertical lifting and horizontal position fine-tuning of the repair platform 5 are achieved through the coordinated work of the supporting electric cylinder 42 and the main electric cylinder 41 on the adjustment plate 82. When stable repair is required, the adjustment plate 82 can be placed between the two sliders 81 to form a trapezoidal support structure; when flexible adjustment is required, the adjustment plate 82 can be moved to one side of the slider 81 to form a parallelogram structure. During the repair process, the operator can work on the repair platform 5. The fence 52 around the repair platform 5 provides safety protection. If there is a risk of falling from a high altitude during the repair process, an inflatable cushion 12 can be used for protection. At the same time, the blocking door 13 and the side blocking door 15 can also provide additional protection when necessary.

[0054] After the repair work is completed, the repair platform 5 is first lowered to a suitable height, and then the slider 81 is moved to the initial position by the driving motor. The gas in the airbag and the inflatable cushion is released, and the connection with the high-pressure air pump is disconnected. The plug board 3 is pulled out from the lower bracket 11, and then the distance between the two lower brackets 11 is adjusted for storage and transportation.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A tunnel repair stand, characterized in that: The invention comprises a support assembly (1), a distance adjustment mechanism (2), a plug plate (3), a vertical lifting mechanism (4), a repair platform (5) and a slide plate assembly (8); the support assembly (1) comprises two lower supports (11), the distance adjustment mechanism (2) and the plug plate (3) are respectively assembled between the two lower supports (11); a plurality of slide plates (8) are provided, and the plurality of slide plates (8) are slidably assembled on the two lower supports (11); the repair platform (5) is connected to the slide plate assembly (8) via the vertical lifting mechanism (4).

2. A tunnel repair stand according to claim 1, characterized in that: The inner cavity of the lower bracket (11) is equipped with an air bag (14); the bottom of the lower bracket (11) is provided with an air outlet groove (111); the air outlet groove (111) is provided with a plurality of air outlet holes (112); the air bag (14) is placed on top of the plurality of air outlet holes (112); and the bottom of the air bag (14) is provided with a plurality of overflow holes (141) connected to the plurality of air outlet holes (112).

3. The tunnel repair stand according to claim 1, characterized in that: The sides of the two lower brackets (11) are provided with blocking doors (13), and a first rotating shaft (131) is provided between the lower brackets (11) and the blocking doors (13); an iron sheet (133) is provided on the lower brackets (11), and a permanent magnet (132) that is magnetically attracted to the iron sheet (133) is provided on the blocking doors (13).

4. The tunnel repair stand according to claim 1, characterized in that: The distance adjustment mechanism (2) comprises a clockwise threaded rod (21), a central knob (22) and a counterclockwise threaded rod (23); two ends of the central knob (22) are connected to the clockwise threaded rod (21) and the counterclockwise threaded rod (23), and the clockwise threaded rod (21) and the counterclockwise threaded rod (23) are respectively screwed to the two lower brackets (11).

5. The tunnel repair stand according to claim 1, characterized in that: The plug board (3) comprises a plug board body (31) and side plug boards (32) provided on both sides of the plug board body (31); a slot (113) for inserting the side plug boards (32) is provided on the upper surface of the lower bracket (11).

6. The tunnel repair stand according to claim 5, characterized in that: The side plug plate (32) is provided with an inner plug hole (321), and the side wall of the lower bracket (11) is provided with a fixing groove (7) connected to the inner plug hole (321). The connected inner plug hole (321) and the fixing groove (7) are equipped with a fixing assembly (9) for connecting the side plug plate (32) and the lower bracket (11).

7. The tunnel repair stand according to claim 6, characterized in that: The fixing assembly (9) comprises a limit plate (91), a latch (92), a sliding block (93) and a flexible spring (94); the end of the latch (92) penetrates the fixing groove (7) and is inserted into the inner plug hole (321); the fixing groove (7) comprises a mounting groove (71), a guide hole (72) and a guide groove (73); the guide groove (73) and the mounting groove (71) are connected via the guide hole (72); the end of the latch (92) is connected to the limit plate (91), and the sliding block (93) and the flexible spring (94) are sleeved on the latch (92) in the guide groove (73).

8. The tunnel repair stand according to claim 1, characterized in that: The vertical lifting mechanism (4) comprises a main electric cylinder (41), a supporting electric cylinder (42) and a clamp (43); a first telescopic rod (411) is mounted on one end of the main electric cylinder (41), and the clamp (43) is sleeved on the main electric cylinder (41); a second rotating shaft (431) is mounted on the clamp (43), and a second telescopic rod (421) provided on the supporting electric cylinder (42) is rotatably connected to the second rotating shaft (431).

9. The tunnel repair stand according to claim 1, characterized in that: The upper surface of the lower bracket (11) is provided with a sliding groove (6), and the sliding plate assembly (8) is slidably connected to the lower bracket (11) via the sliding groove (6). The sliding plate assembly (8) comprises a sliding block (81) rotatably connected to the main electric cylinder (41) and an adjusting plate (82) rotatably connected to the supporting electric cylinder (42).

10. The tunnel repair stand according to claim 1, characterized in that: The repair platform (5) comprises a bottom plate (51) and a fence (52) mounted around the bottom plate (51). A hinged seat (53) connected to the first telescopic rod (411) is provided at the bottom of the bottom plate (51).

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