A prefabricated box girder maintenance system

Abstract

This application discloses a prefabricated box girder curing system, relating to the technical field of bridge curing. The system comprises an isolation frame and a spray curing mechanism. The isolation frame is slidably positioned on one side of the spray curing mechanism and includes an isolation plate with a clearance hole for the box girder to pass through. The spray curing mechanism comprises a mobile base and a spray frame mounted on the mobile base. The spray frame is provided with a spray network pipe connected to a nozzle. A first drive source is provided at one end of the spray network pipe for transporting external water into the spray network pipe. This application facilitates wet curing of the box girder while the operator is removing the formwork.

Description

Technical Field

[0001] The present application relates to the technical field of bridge maintenance, and in particular to a prefabricated box girder maintenance system. Background Art

[0002] A box girder is a type of beam used in bridge construction. It is hollow inside with flanges on both sides, resembling a box. Box girders are available in single-box and multi-box configurations. Reinforced concrete box girders are available in precast and cast-in-place configurations. Precast box girders can accelerate construction progress and save time.

[0003] Precast box girders are constructed by pouring concrete into precast box girder formwork. To ensure the precast box girders reach the specified strength, curing is required before and after demolding, with strict control of temperature and humidity. During hot, windy, and dry seasons, curing is typically performed by removing the formwork section by section, watering the girders while removing them, or spraying curing agents while removing them.

[0004] When the operator is removing the formwork while spraying water on the prefabricated box girder, the spraying water is easy to splash onto the operator because the prefabricated box girder needs to be sprayed in all directions, making it inconvenient for the operator to perform the formwork removal operation. Summary of the Invention

[0005] In order to reduce the impact of spray curing of prefabricated box girders on the operator's formwork removal work, the present application provides a prefabricated box girder curing system.

[0006] This application provides a prefabricated box girder maintenance system, which adopts the following technical solutions:

[0007] A prefabricated box girder curing system includes an isolation frame and a spray curing mechanism, wherein the isolation frame is slidably placed on one side of the spray curing mechanism, and the isolation frame includes an isolation plate, and the isolation plate is provided with a clearance hole for the box girder to pass through;

[0008] The spray maintenance mechanism includes a mobile base and a spray rack arranged on the mobile base, the spray rack is provided with a spray network pipe, the spray network pipe is connected to a spray head, and a first driving source is provided at one end of the spray network pipe, and the first driving source is used to transport external water into the spray network pipe.

[0009] By adopting the above technical solution, the spray maintenance mechanism realizes movement around the box girder through the mobile base, and the first driving source transports external water to the spray network pipe, and the exposed outer wall of the box girder is fully sprayed and maintained while the operator removes the mold in sections; the isolation frame is slidably set on one side of the spray network pipe and moves toward the operator; the clearance hole on the isolation plate is for the box girder to pass through, so that the isolation frame can move along the length direction of the box girder. When the spray maintenance mechanism is in operation, the isolation frame separates the spray maintenance mechanism from the operator, thereby reducing the possibility of the spray maintenance mechanism splashing water onto the operator, making it convenient for the operator to remove the mold.

[0010] Optionally, the spray network pipe includes a central spray pipe laid along the spray frame and expanded spray pipes located on both sides of the central spray pipe. Several nozzles are provided on the central spray pipe and the expanded spray pipe, and the nozzles located on the central spray pipe have different orientations from those located on the expanded spray pipe.

[0011] By adopting the above technical solution, the laying of the central spray pipe and the expanded spray pipe expands the spray range of the spray network pipe; the nozzles on the central spray pipe and the expanded spray pipe have different directions, which further expands the spray range of the spray network pipe and achieves full replenishment of moisture on the surface of the box girder.

[0012] Optionally, the machine further comprises a covering device, the covering device comprising a movable frame and a winding roller group rotatably arranged on the movable frame;

[0013] The winding roller group includes an end winding roller and side winding rollers located on both sides of the end winding roller. Water-absorbent covering fabric is wound around the end winding roller and the side winding roller. The end of the covering fabric away from the movable frame passes through the spray frame and is fixedly connected to the isolation plate.

[0014] By adopting the above technical solution, the mobile frame makes the covering device mobile, making it easier for operators to move the covering device to the construction site; covering fabrics are wound around the side winding rollers and the end winding rollers, and one end of the covering fabrics is fixedly connected to the isolation plate. When the isolation plate moves, the covering fabrics on the winding roller group can be pulled out, and the spray mesh pipes on the spray rack spray the covering fabrics, so that the covering fabrics absorb sufficient moisture and then cover the box beam, achieving further maintenance of the box beam. Moreover, because the covering fabrics are water-absorbent, they can absorb a large amount of moisture and store the moisture for a short period of time, so that the box beam can be replenished with moisture in a timely manner. When the spray curing mechanism moves to the rest of the box beam to spray, the setting of the covering fabrics keeps the sprayed box beam area moist for a certain period of time, thereby reducing the rate of moisture loss on the box beam surface.

[0015] Optionally, the mobile frame includes a sliding platform and a roller group supporting frame arranged on the sliding platform, the roller group supporting frame includes a first support rod vertically arranged at both ends of the sliding platform, and the side winding roller is coaxially fixed to the first support rod;

[0016] A second support rod is rotatably provided above the first support rod, and an axis of the second support rod is perpendicular to the first support rod. The end surface winding roller is coaxially fixed on the second support rod.

[0017] By adopting the above technical solution, the first support rod is rotatably set on the sliding table, and the side winding roller is sleeved and fixed on the first support rod, thereby realizing the rotational connection of the side winding roller on the mobile frame; the second support rod is rotatably set, and the end winding roller is sleeved and fixed on the second support rod, thereby realizing the rotational connection of the end winding roller on the mobile frame.

[0018] Optionally, one end of the covering fabric close to the movable frame is fixed to the winding roller group, and the movable frame is provided with a driving component for driving the winding roller group to rotate.

[0019] By adopting the above technical solution, one end of the covering fabric is fixed on the winding roller group. When the box girder maintenance is completed, the driving component can drive the winding roller group to rotate, so that the winding roller group can wind up the covering fabric for the next use.

[0020] Optionally, the driving assembly includes a second driving source and a first bevel gear coaxially fixed to the second support rod, and a driving member is rotatably provided on the mobile frame, and the driving member is used to drive the two second support rods to rotate; the driving member is provided with a second bevel gear meshing with the first bevel gear.

[0021] By adopting the above technical solution, the second driving source drives the second supporting rod to rotate, so that the second supporting rod can reel in the covering fabric connected to itself; the first bevel gear is coaxially fixed on the second supporting rod, and when the second driving source drives the first bevel gear to rotate, the second gear engages with the first gear, driving the driving member to rotate, and when the driving member rotates, it drives the two first supporting rods to rotate, so that the side reeling rollers reel in the covering fabric connected to themselves, thereby realizing the simultaneous reeling operation of the end reeling roller and the side reeling roller.

[0022] Optionally, the driving member includes a driving rod, on which a driving wheel is coaxially fixed; a transmission wheel is sleeved and fixedly provided on each of the two first support rods, and a rotating wheel is sleeved and fixedly provided on the first support rod close to the driving rod;

[0023] The driving assembly further comprises a driving belt and a transmission belt, wherein the driving belt is sleeved on the driving wheel and the rotating wheel, and the transmission belt is sleeved on the two transmission wheels.

[0024] By adopting the above technical solution, the driving belt is sleeved on the driving wheel and the rotating wheel. When the driving rod rotates, the transmission belt moves along the outer wall of the driving wheel and the rotating wheel, thereby driving the rotating wheel to rotate, so that the first support rod fixedly connected to the rotating wheel rotates; a conveying belt is sleeved on the two transmitting wheels. When the first support rod fixed to the rotating ring rotates, it can drive the conveying belt to move along the outer wall of the two transmitting rings, thereby driving the other first support rod to rotate.

[0025] Optionally, a shaping assembly is provided on the spray rack, and the shaping assembly includes a shaping rod slidingly arranged on both sides of the spray rack in a horizontal direction and a pressure plate fixed to one end of the shaping rod, and the shape of the pressure plate is adapted to the side shape of the box beam.

[0026] By adopting the above technical solution, the shaping rod is set to slide, and the distance between the pressure plate and the side wall of the box beam can be adjusted by sliding the shaping rod, so that the pressure plate can be adjusted close to the side of the box beam; when the covering fabric is laid, the pressure plate can press part of the covering fabric that has absorbed moisture onto the side wall of the box beam, so that the covering fabric can be in full contact with the side wall of the box beam, thereby improving the maintenance effect of multiple box beams.

[0027] Optionally, a material pressing plate and a third driving source for driving the material pressing plate to slide in a vertical direction are slidably provided on one side of the roller group carrier frame, and the material pressing plate is used to abut against the covering fabric on the end face winding roller.

[0028] By adopting the above technical solution, the pressing plate is slidably arranged on one side of the roller group support frame. When a box beam is demolded, the covering fabric covers the box beam along the length direction of the box beam. Since the covering fabric wound on the end face winding roller is tilted upward near the end of the winding roller, there is a large gap between the end face of the box beam and the covering fabric, and the covering effect is poor. The pressing plate slides in the direction close to the covering fabric to further pull out the covering fabric, so that the covering fabric fits against the top of the box beam and covers part of the end of the box beam, thereby improving the covering effect of the covering fabric and improving the maintenance quality.

[0029] Optionally, the third driving source is configured as a telescopic cylinder, the telescopic cylinder includes a telescopic rod that can be telescoped, and the telescopic rod is connected to the pressing plate.

[0030] By adopting the above technical solution, the telescopic rod of the telescopic cylinder is connected to the pressing plate, thereby driving the pressing plate to move.

[0031] In summary, this application has at least one of the following beneficial effects:

[0032] 1. The isolation rack is slidably placed on one side of the spray curing mechanism, and an isolation plate is provided on the isolation rack. When the spray curing mechanism is in operation, the isolation rack will block the water sprayed by the spray curing mechanism, thereby reducing the possibility of the spray curing mechanism splashing water onto the operator, making it easier for the operator to remove the mold;

[0033] 2. The spray network pipe includes a central spray pipe and expanded spray pipes on both sides of the central spray pipe. The nozzles on the central spray pipe and the nozzles on the expanded spray pipes have different directions, thereby expanding the spray range of the spray network pipe and achieving sufficient replenishment of moisture on the box girder surface;

[0034] 3. The covering material is laid on the surface of the box girder through the setting of the covering device. The spray mesh pipe on the spray rack sprays the covering material so that the covering material absorbs sufficient moisture and then covers the box girder, thereby further maintaining the box girder, increasing the humidity around the box girder, and reducing the rate of moisture loss on the box girder surface during hot and windy dry seasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of the prefabricated box girder maintenance system according to an embodiment of the present application;

[0036] Figure 2 It is a structural diagram of the spray curing mechanism of an embodiment of the present application;

[0037] Figure 3 This is a schematic diagram of the overall structure of the prefabricated box girder maintenance system showing the installation position of the drive assembly in an embodiment of the present application;

[0038] Figure 4 It is an enlarged schematic diagram of the local structure of the display driver component of an embodiment of the present application.

[0039] Explanation of reference numerals: 1. Isolation frame; 11. Isolation plate; 111. Clearance hole; 12. Moving wheel; 13. Sponge pad; 2. Spray maintenance mechanism; 21. Moving base; 22. Spray frame; 23. Spray network pipe; 231. Center spray pipe; 232. Expanding spray pipe; 24. Spray head; 25. First driving source; 26. Guide sleeve; 3. Covering device; 31. Sliding table; 32. Roller group carrier; 321. First support rod; 322. Limiting plate; 323. Second support rod; 324. Installation Frame; 3241, mounting slot; 33, universal wheel; 34, winding roller assembly; 341, end winding roller; 342, side winding roller; 35, covering fabric; 4, driving assembly; 41, second driving source; 42, first bevel gear; 43, second bevel gear; 44, driving rod; 45, driving wheel; 46, transmission wheel; 47, rotating wheel; 48, driving belt; 49, transmission belt; 5, shaping assembly; 51, shaping rod; 52, pressure plate; 6, pressing plate; 7, third driving source; 8, locking piece. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-4 This application is described in further detail.

[0041] The present application discloses a prefabricated box beam maintenance system, referring to Figure 1 The prefabricated box girder curing system includes an isolation frame 1, a covering device 3, and a spray curing mechanism 2 located between the isolation frame 1 and the covering device 3. The isolation frame 1 includes an isolation plate 11 and a moving wheel 12 arranged at the bottom of the isolation plate 11. A clearance hole 111 is provided on the isolation plate 11, and the shape of the clearance hole 111 is adapted to the cross-section of the box girder, so that the isolation plate 11 can be sleeved on the box girder and moved. When the operator performs segmented demolding, the isolation plate 11 separates the spray curing mechanism 2, thereby reducing the possibility of the operator being splashed by water, making it easier for the operator to complete the demolding work smoothly. A sponge pad 13 is pasted on the inner wall of the clearance hole 111. The sponge pad 13 has strong water absorption performance and can reduce the possibility of spray water passing through the isolation plate 11 along the inner wall of the clearance hole 111 and the gap between the box girder.

[0042] The moving wheels 12 are driven by a motor. In order to achieve smooth operation of the isolation frame 1, two rows of moving wheel groups are arranged in parallel at both ends of the isolation plate 11. In this embodiment, one row of moving wheel groups includes three coaxially arranged moving wheels 12.

[0043] Reference Figure 2The spray maintenance mechanism 2 includes a spray rack 22 and a movable base 21 disposed at the bottom of the spray rack 22. The movable base 21 is controlled to move by a motor. A spray network pipe 23 is fixed to the side wall of the spray rack 22. The spray network pipe 23 includes a central spray pipe 231 and an expansion spray pipe 232. Two expansion spray pipes 232 are specifically provided, and are respectively located on both sides of the central spray pipe 231. The central spray pipe 231 and the expansion spray pipe 232 are both laid along the spray rack 22. A plurality of nozzles 24 are connected to the central spray pipe 231 and the expansion spray pipe 232 at intervals. The nozzles 24 on the central spray pipe 231 are arranged in a direction perpendicular to the side wall of the spray rack 22. The spray ports on the expansion spray pipe 232 are inclined away from the axis of the central spray pipe 231, thereby expanding the spray range of the spray network pipe 23 and achieving all-round spraying of the box girder.

[0044] The central spray pipe 231 and the expanded spray pipe 232 are interconnected at one end and connected to a first drive source 25, specifically a water pump. The water pump transports water from outside the spray network pipe 23 into the spray network pipe 23, where it is sprayed from the nozzle 24 to provide moist curing for the box girder.

[0045] Reference Figure 1 and Figure 3 The covering device 3 includes a mobile frame and a winding roller group 34 rotatably arranged on the mobile frame. The mobile frame includes a sliding platform 31 and a roller group carrier 32 arranged on the sliding platform 31. A universal wheel 33 with a brake is installed at the bottom of the sliding platform 31. In this embodiment, there are four universal wheels 33, and they are all distributed on the sliding platform 31. The roller group carrier 32 includes a mounting frame 324 and a first support rod 321 arranged between the sliding platform 31 and the mounting frame 324. A column is fixed on the end face of the sliding platform 31 away from the universal wheel 33, and the mounting frame 324 is fixed to the top of the column. Two first support rods 321 are vertically arranged and are respectively located at both ends of the sliding platform 31. A mounting groove 3241 is opened on the mounting frame 324. A second support rod 323 is rotatably arranged in the mounting groove 3241, and the second support rod 323 is horizontally arranged.

[0046] Reference Figure 1 and Figure 3The winding roller assembly 34 includes an end winding roller 341 and two side winding rollers 342. The end winding roller 341 is sleeved and fixed on the second support rod 323, and the side winding rollers 342 are sleeved and fixed on the first support rod 321. A water-absorbent covering fabric 35 is wound around both the end winding roller 341 and the side winding rollers 342. One end of the covering fabric 35 is bonded and fixed to the winding roller assembly 34, and the other end passes through the spray rack 22 and is fixed to the isolation plate 11. In order to reduce the possibility of the covering fabric 35 wound around the first support rod 321 slipping off the first support rod 321, a limit plate 322 is fixed to one end of the side winding roller 342 near the sliding platform 31. The limit plate 322 is used to abut against the covering fabric 35 located on the first support rod 321, providing partial support for the covering fabric 35 on the first support rod 321.

[0047] Maintaining the position of the movable frame, the spacer frame 1 moves, driving the covering fabric 35 to extend, allowing it to cover the box girder sidewalls. While the covering fabric 35 covers the box girder, the spray curing mechanism 2 simultaneously sprays the covering fabric 35. After absorbing sufficient moisture, the covering fabric 35 covers the box girder sidewalls, replenishing moisture to the exposed area of ​​the box girder, increasing the air humidity around the box girder, and reducing the rate of moisture evaporation from the box girder surface. In this embodiment, the covering fabric 35 is specifically configured as a geotextile.

[0048] Reference Figure 3 and Figure 4 , a driving assembly 4 for driving the winding roller group 34 to rotate is also provided on the mobile frame. The driving assembly 4 includes a second driving source 41 and a first bevel gear 42 and a second bevel gear 43 that are meshed with each other. The second driving source 41 is fixed to the outer wall of the mounting frame 324. In this embodiment, the second driving source 41 is specifically configured as a motor, and the output shaft of the second driving source 41 passes through the mounting frame 324 and is coaxially fixed to the second support rod 323. The first bevel gear 42 is located at the end of the second support rod 323 away from the second driving source 41, and the first bevel gear 42 is coaxially fixed to the second support rod 323. A driving member is provided in the mounting frame 324. The driving member is specifically configured to be rotatably connected to the driving rod 44 on the inner wall of the mounting groove 3241, and the second bevel gear 43 is coaxially fixed to the driving rod 44.

[0049] Reference Figure 3 and Figure 4The drive assembly 4 also includes a drive belt 48 and a transmission belt 49. One end of the first support rod 321, near the drive rod 44, passes through the side wall of the mounting frame 324 and is fitted with a rotating pulley 47. A drive pulley 45 is fitted onto the drive rod 44, and the drive belt 48 is fitted over both the drive pulley 45 and the rotating pulley 47. The ends of the two first support rods 321, near the mounting frame 324, are fitted with a transmission pulley 46, and the transmission belt 49 is fitted over both transmission pulleys 46. There is some friction between the drive belt 48 and the outer walls of the rotating pulley 47 and the drive pulley 45, and there is also some friction between the transmission belt 49 and the outer walls of the transmission pulley 46.

[0050] When the second driving source 41 drives the second support rod 323 to rotate, the second bevel gear 43 engages with the first bevel gear 42, driving the driving rod 44 to rotate, so that the driving belt 48 drives the first support rod 321 set near the driving rod 44 to rotate. Under the action of the transmission belt 49, the other first support rod 321 also rotates, realizing the winding roller group 34 to wind up the three covering fabrics 35 for the next use.

[0051] Reference Figure 1 and Figure 2 A shaping assembly 5 is provided on one side of the spray rack 22. The shaping assembly 5 includes a shaping rod 51 and a pressure plate 52 fixed to one end of the support rod. There are two shaping rods 51, which are respectively located on both sides of the spray rack 22; the pressure plate 52 is adapted to the side shape of the box beam and is used to abut against the covering fabric 35 located on the side winding roller 342. Guide sleeves 26 are fixed on both sides of the spray rack 22. The shaping rod 51 is inserted into the guide sleeve 26 and is slidably connected to the guide sleeve 26. A locking member 8 is provided on the guide sleeve 26. The locking member 8 is specifically configured as a locking bolt threadedly connected to the guide sleeve 26. After sliding the shaping rod 51 to move the pressure plate 52 to a suitable position, the locking bolt can be used to abut against the shaping rod 51, so that the position of the pressure plate 52 is not easily changed.

[0052] After the covering fabric 35 absorbs moisture, the processing pressing plate 52 moves toward the covering fabric 35, pressing the covering fabric 35 between the box beam and the pressing plate 52, so that the covering fabric 35 is in full contact with the side wall of the box beam to replenish moisture.

[0053] Reference Figure 1 and Figure 2A press plate 6 is slidingly provided on the side of the roller group carrier 32 near the spray frame 22. A third drive source 7 is fixed to the top of the roller group carrier 32. In this embodiment, the third drive source 7 is specifically configured as a telescopic cylinder, which includes a telescopic rod that can be extended and retracted. The telescopic rod is fixedly connected to the press plate 6. When the covering fabric 35 completely covers the box beam along the length direction of the box beam, the telescopic cylinder drives the press plate 6 to move vertically downward, further pulling out the covering fabric 35 located on the end face winding roller 341, so that the covering fabric 35 stretches and droops, contacting the end of the box beam, thereby improving the covering effect of the covering fabric 35 and further improving the maintenance quality.

[0054] The implementation principle of a prefabricated box girder maintenance system according to an embodiment of the present application is as follows: the prefabricated box girder maintenance system is moved to the construction site, and the position of the mobile frame is fixed after the clearance hole 111 on the isolation plate 11 is aligned with the box girder. When the operator starts to remove the mold, the isolation frame 1 gradually moves in the direction away from the mobile frame. While the isolation frame 1 moves, it drives the covering fabric 35 on the winding roller group 34 to move, and the covering fabric 35 is pulled out and covered on the box girder. When the spray frame 22 moves to the box girder, the shaping rod 51 is slid so that part of the covering fabric 35 is clamped between the side wall of the box girder and the pressure plate 52; then the locking bolt is tightened so that the locking bolt is pressed against the shaping rod 51. Start the first driving source 25 to transport the external water source into the spray network pipe 23, so that the spray network pipe 23 sprays the covering fabric 35 and the box girder. When the isolation plate 11 reaches the end of the box girder, the third drive source 7 is activated, driving the press plate 6 to move vertically downward, further stretching the covering fabric 35 located on the end winding roller 341, causing the covering fabric 35 to drape and adhere to the end of the box girder. During the curing process, the spray curing mechanism 2 performs intermittent reciprocating motion along the length of the box girder, replenishing moisture to the outer wall of the box girder.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A prefabricated box girder maintenance system, characterized by: It comprises an isolation frame (1) and a spray curing mechanism (2), wherein the isolation frame (1) is slidably placed on one side of the spray curing mechanism (2), and the isolation frame (1) comprises an isolation plate (11), and the isolation plate (11) is provided with a clearance hole (111) for the box beam to pass through; The spray maintenance mechanism (2) comprises a movable base (21) and a spray rack (22) arranged on the movable base (21); a spray network pipe (23) is arranged on the spray rack (22); a spray head (24) is connected to the spray network pipe (23); a first driving source (25) is arranged at one end of the spray network pipe (23); the first driving source (25) is used to transport external water into the spray network pipe (23); It also includes a covering device (3), the covering device (3) including a movable frame and a winding roller group (34) rotatably arranged on the movable frame; The winding roller group (34) includes an end winding roller (341) and side winding rollers (342) located on both sides of the end winding roller (341), and a water-absorbing covering fabric (35) is wound around the end winding roller (341) and the side winding roller (342), and the covering fabric (35) is fixedly connected to the isolation plate (11) at one end away from the movable frame through the spray frame (22); A shaping assembly (5) is provided on the spray frame (22), and the shaping assembly (5) comprises shaping rods (51) slidably arranged on both sides of the spray frame (22) in a horizontal direction and a pressure plate (52) fixed to one end of the shaping rod (51), and the shape of the pressure plate (52) is adapted to the shape of the side surface of the box beam.

2. A prefabricated box girder maintenance system according to claim 1, characterized in that: The spray network pipe (23) comprises a central spray pipe (231) laid along the spray frame (22) and expanded spray pipes (232) located on both sides of the central spray pipe (231). A plurality of spray heads (24) are provided on both the central spray pipe (231) and the expanded spray pipe (232), and the spray heads (24) located on the central spray pipe (231) and the spray heads (24) located on the expanded spray pipe (232) have different orientations.

3. The prefabricated box beam maintenance system according to claim 1, characterized in that: The movable frame includes a sliding platform (31) and a roller group support frame (32) arranged on the sliding platform (31), the roller group support frame (32) includes a first support rod (321) vertically arranged at both ends of the sliding platform (31), and the side winding roller (342) is coaxially fixed to the first support rod (321); a second support rod (323) is rotatably arranged above the first support rod (321), and the axis of the second support rod (323) is perpendicular to the first support rod (321), and the end winding roller (341) is coaxially fixed to the second support rod (323).

4. The prefabricated box beam maintenance system according to claim 3, characterized in that: One end of the covering fabric (35) close to the movable frame is fixed to the winding roller group (34), and a driving component (4) for driving the winding roller group (34) to rotate is provided on the movable frame.

5. The prefabricated box girder maintenance system according to claim 4, characterized in that: The driving assembly (4) comprises a second driving source (41) and a first bevel gear (42) coaxially fixed to the second support rod (323); a driving member is rotatably provided on the mobile frame, and the driving member is used to drive the two second support rods (323) to rotate; and a second bevel gear (43) is provided on the driving member and meshes with the first bevel gear (42).

6. The prefabricated box girder maintenance system according to claim 5, characterized in that: The driving member comprises a driving rod (44), and a driving wheel (45) is coaxially fixed on the driving rod (44); a transmission wheel (46) is sleeved and fixedly provided on each of the two first support rods (321), and a rotating wheel (47) is sleeved and fixedly provided on the first support rod (321) close to the driving rod (44); The driving assembly (4) further comprises a driving belt (48) and a transmission belt (49), wherein the driving belt (48) is sleeved on the driving wheel (45) and the intermediate wheel (47), and the transmission belt (49) is sleeved on the two transmission wheels (46).

7. The prefabricated box beam maintenance system according to claim 3, characterized in that: A material pressing plate (6) and a third driving source (7) for driving the material pressing plate (6) to slide in a vertical direction are slidably provided on one side of the roller group carrier (32); the material pressing plate (6) is used to abut against the covering fabric (35) on the end face winding roller (341).

8. The prefabricated box girder maintenance system according to claim 7, characterized in that: The third driving source (7) is configured as a telescopic cylinder, the telescopic cylinder comprising a telescopic rod capable of being telescoped, and the telescopic rod is connected to the pressing plate (6).

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