Prefabricated concrete box girder curing device capable of being assembled

Abstract

The invention discloses an assembled precast concrete box girder maintenance device which comprises a spraying system and a maintenance vehicle, the spraying system is installed on the maintenance vehicle and connected with a water tank through a water conveying pipe and a water pump, and the maintenance vehicle comprises a maintenance frame, an angle adjusting telescopic supporting rod and a maintenance frame base. The maintenance frame comprises a square frame formed by fixedly connecting longitudinal connecting rods and transverse connecting rods, a plurality of telescopic rods extending downwards are fixedly connected to one side of the square frame, maintenance frame mounting transverse bolts are arranged at the bottom ends of the telescopic rods, and a maintenance frame connecting sleeve is fixedly arranged on one side of the maintenance frame base. The curing frame mounting transverse bolt is inserted and hinged in the curing frame connecting sleeve; a limiting hole for mounting a limiting bolt to prevent the curing frame mounting transverse bolt from falling off is formed in the curing frame base; a hinge sleeve is arranged on the other side of the square frame, the upper end of an angle-adjusting telescopic supporting rod is hinged to the hinge sleeve, and the lower end of the angle-adjusting telescopic supporting rod is inserted into a mounting hole in the maintenance frame base. The maintenance device can meet maintenance of different beam heights.

Description

Technical Field

[0001] The invention relates to the technical field of box beam maintenance devices, and in particular to an assembleable precast concrete box beam maintenance device. Background Art

[0002] With the development of technology and the continuous expansion of infrastructure construction, more and more bridge projects are being built, especially precast concrete box girders, which have been widely used in bridge projects. Precast concrete box girders are cast with concrete, and the hydration of cement is constantly going on during the solidification and hardening of concrete. Cement hydration requires sufficient temperature and appropriate conditions to ensure that the mechanical strength of concrete meets the standards and the appearance quality is excellent. Therefore, after the concrete is cast, it must be watered and maintained when the weather is hot and the air is dry.

[0003] In recent years, due to the long maintenance cycle of concrete box girders and the increasing height of the beams, manual watering maintenance is time-consuming and laborious. Traditional manual watering maintenance requires workers to climb up and down, which poses safety hazards and wastes water resources. There are also problems of maintenance dead corners and poor results, which cause local over-maintenance of concrete, serious color difference, and uneven color of concrete appearance. The use of automatic spraying maintenance system can effectively solve the problems of time-consuming and labor-intensive maintenance of concrete box girders and unsafe manual maintenance. The traditional automatic spraying maintenance device for box girders is fixed, so the nozzle is also fixed and the height is also fixed. If you want to adapt to box girders with different heights and web angles, you must rebuild the spraying system. Otherwise, there will be maintenance dead corners, uneven maintenance, and serious color difference in the local over-maintenance of the beam body during maintenance. Therefore, there is an urgent need for an assembleable, simple, labor-saving, efficient and safe concrete box girder maintenance device to carry out box girder maintenance work. Public literature also reports some information about concrete prefabricated box girder maintenance devices, such as: 1. Chinese Patent: An automatic spray curing device for prefabricated box beam; Application number: 201820554281.9; Application date: 2018.04.18; Abstract: The utility model discloses an automatic spray curing device for prefabricated box beam, which is characterized by comprising a spray car and a track; the track device is arranged on the side of the prefabricated box beam, and the spray car is mounted on the track; the spray car is equipped with a running wheel adapted to the track and a power system for driving the spray car to travel on the track; the spray car is equipped with a spray device and a control system; a limit block is arranged at the end of the track, and a limit switch adapted to the limit block is arranged at the end of the spray car; the control system is respectively connected to the limit switch, the power system and the spray device. The advantages of the utility model are: not only the labor productivity is greatly improved, but also the beam body is kept in a wet state during the concrete curing period, which is conducive to the improvement of the early strength of concrete, and has obvious effects on improving the early strength of concrete and preventing shrinkage cracks in concrete.

[0004] 2. Chinese Patent: Automatic spray curing device for prefabricated box beam concrete; Application No. 202023316700.1; Application Date: 2020.12.31; Abstract: The utility model belongs to the field of concrete prefabricated parts maintenance, and specifically relates to an automatic spray curing device for prefabricated box beam concrete, including a spray truck and a spray pipe on the spray truck, the spray pipe includes a main water pipe, a top plate spray pipe and a side plate spray pipe, a plurality of elastic telescopic water pipes are arranged on the main water pipe, and the two ends of the telescopic water pipes are connected by joints. It is fixed and communicated with the main water pipe, a moving rod is arranged on the side wall of the upper end joint, a telescopic cylinder is arranged under the moving rod, the cylinder includes a piston rod and a cylinder barrel, the moving rod is fixedly connected with the piston rod, the bottom of the cylinder barrel is fixedly connected with the spray truck, a plurality of extension pipes are arranged at the bottom of the side plate spray pipe, a water pipe valve is arranged near one end of the extension pipe of the side plate spray pipe, an atomizing nozzle and a water pipe valve are arranged on the extension pipe, one end of the first section of the extension pipe is detachably connected and communicated with the side plate spray pipe, and the other end is detachably connected to the next section of the extension pipe. The utility model can be telescopic in height and increase in width, and is suitable for prefabricated box beams of different heights and widths.

[0005] 3. Chinese Patent: Cast-in-place box girder concrete curing device; Application No. 202120044063.2; Application Date: 2021.01.08; Abstract: The utility model discloses a cast-in-place box girder concrete curing device, including a cast-in-place box girder, the cast-in-place box girder includes box girder concrete and a surrounding support frame, there are slide rail support plates on the ground on both sides of the cast-in-place box girder, the curing slide rails on the slide rail support plates are slidably installed with column bottom connecting plates, there are sliding support columns on the column bottom connecting plates, the upper end of the sliding support column at the edge position is connected with a curing top plate, the inner side curing bottom beam of the sliding support column at the edge position is connected to the surrounding support frame through an angle adjustment vertical bolt, and the fixed support rod on the curing bottom beam is connected to the surrounding support frame through an angle adjustment horizontal bolt; the curing water tank on the curing top plate is connected to the curing water pipe in the surrounding support frame. The utility model can realize accurate control of the curing space of the box girder concrete.

[0006] Through application investigation and research, it is found that Documents 1 and 3 need to set tracks on both sides of the box beam to install a spray trolley and a power system. The power system controls the trolley to spray and travel. The power system is in a humid and misty environment for a long time. The power system is prone to short circuit and electric shock, which poses a great safety hazard. The spray trolley is fixed in form and has a narrow scope of application. It is necessary to customize a specific spray trolley according to the needs of different beam heights. Document 3 also sets a water tank on the top of the box beam, which will conflict with the reserved bridge deck steel bars on the top of the box beam. Documents 1 and 3 both need to set tracks, which increases the maintenance and construction costs. The automatic spray curing device for prefabricated box beam concrete in Document 2 requires a telescopic cylinder. The telescopic cylinder is in a humid environment for a long time. The device is easy to damage, the device is bulky, and it is not convenient to install and disassemble. The construction steps are cumbersome, which increases the cost and also brings safety hazards. Therefore, the curing device should be easy to install and disassemble, and use as little hydraulic or high-power electrical appliances as possible. When in a humid state, the energized equipment is prone to safety hazards. At the same time, it must meet the curing conditions of different beam heights. Summary of the invention

[0007] The purpose of the present invention is to provide an assembleable precast concrete box girder maintenance device in view of the problems existing in the prior art. The assembleable precast concrete box girder maintenance device is designed by optimizing the spray trolley, using less live electrical appliances as the driving walking system, optimizing the weight of the spray trolley so that the overall installation and disassembly of the device is light, and is an assembleable light precast concrete box girder maintenance device that can adapt to different beam heights.

[0008] The present invention is achieved by adopting the following technical solutions: A prefabricated concrete box girder maintenance device that can be assembled includes a spray system and a maintenance vehicle, wherein the spray system is installed on the maintenance vehicle, and the spray system is connected to a water tank through a water pipe and a water pump, and the maintenance vehicle includes a maintenance frame, an angle-adjustable telescopic support rod, and a square maintenance frame base, wherein the maintenance frame includes a square frame composed of a longitudinal connecting rod and a transverse connecting rod fixedly connected, and a plurality of telescopic rods extending downward are fixedly connected to one side of the square frame, and a maintenance frame installation cross bolt is arranged at the bottom end of the telescopic rod, and the maintenance frame installation cross bolt is extended along the length direction of the square frame, and one side of the maintenance frame base corresponds to the maintenance frame installation cross bolt. A maintenance frame connecting sleeve is fixedly provided at the bolt position, and the maintenance frame connecting sleeve is also extended along the length direction of the square frame. The maintenance frame installation cross bolt is inserted and hinged in the maintenance frame connecting sleeve. A limiting hole is provided on the maintenance frame base where the maintenance frame installation cross bolt end of the maintenance frame connecting sleeve is inserted. The limiting hole is inserted with a limiting bolt for preventing the maintenance frame installation cross bolt from escaping from the maintenance frame connecting sleeve; a plurality of articulated sleeves for articulating the angle-adjusting telescopic support rod are provided on the other side of the square frame, the upper end of the angle-adjusting telescopic support rod is hinged with the articulated sleeve, and the lower end of the angle-adjusting telescopic support rod is inserted in the mounting hole on the maintenance frame base.

[0009] Further preferably, universal wheels are installed at the bottom of the maintenance frame base to facilitate pushing the maintenance device.

[0010] Further preferred: the angle-adjustable telescopic support rod comprises support rod 1, support rod telescopic adjustment sleeve, support rod 2 and connecting bolt, support rod 1 and support rod 2 are telescopically connected through the support rod telescopic adjustment sleeve plug-in sleeve, the upper end of support rod 1 and the lower end of support rod 2 are respectively inserted into the support rod telescopic adjustment sleeve, support rod 1, support rod 2 and support rod telescopic adjustment sleeve are respectively provided with adjustment holes, the connecting bolt is installed in the adjustment hole to fix support rod 1 and support rod 2 with the support rod telescopic adjustment sleeve, and the top end of support rod 2 is laterally provided with an angle-adjustable telescopic support rod installation cross bolt for hinged connection with the hinge sleeve plug-in sleeve. The inclination angle of the curing frame can be changed by adjusting the length of the angle-adjustable telescopic support rod, and proper fitting can be achieved for curing, and prefabricated box beams of different heights can be adapted for curing, and the atomizing nozzle in the curing device can rotate in multiple directions, so that there is no dead angle in the curing of prefabricated box beams.

[0011] Further preferably, the bottom end of the support rod 1 is fixedly connected with an inverted U-shaped plug for inserting into the mounting hole. The mounting hole is set with two holes, and the inverted U-shaped plug is inserted into the corresponding mounting hole to allow the angle-adjustable telescopic support rod and the maintenance frame base to form a stable support structure.

[0012] Further preferred: the spray system includes a spray hose and an atomizing nozzle, the atomizing nozzle is installed on the maintenance frame, the spray hose is connected to the atomizing nozzle, and the spray hose is connected to the water pipe through a water pipe quick connector. The maintenance frame is covered with a moisturizing geotextile, which can be fixed with nylon tie or wire to ensure that the moisturizing geotextile does not fall off after absorbing water. The moisturizing geotextile covers the atomizing nozzle. A hole of appropriate size should be opened in the place where the moisturizing geotextile covers the atomizing nozzle to ensure that the atomizing nozzle passes through the moisturizing geotextile, so that the atomizing nozzle can spray to the beam body. The atomizing nozzle adopts a universal atomizing nozzle, which is connected to the corresponding position of the spray hose through a pipe joint. The spray hose has a certain surplus length reserved to facilitate the normal operation of the maintenance device when the maintenance frame is raised.

[0013] Further preferred: an ultrasonic atomizer is installed on the water pipe, and the ultrasonic atomizer is installed on the water pipe between the water pump and the water pipe quick connector. The ultrasonic atomizer is used to improve the atomization effect. The water pump and the ultrasonic atomizer are controlled by a PLC controller, and the controller has the functions of timed spraying and automatic start of the spraying system.

[0014] Further preferred: the telescopic rod includes a maintenance frame rod 1, a telescopic adjustment sleeve, a maintenance frame rod 2 and a connecting bolt. The maintenance frame rod 1 and the maintenance frame rod 2 are telescopically connected by the telescopic adjustment sleeve. The upper end of the maintenance frame rod 1 and the lower end of the maintenance frame rod 2 are respectively inserted into the telescopic adjustment sleeve. Adjustment holes are respectively provided on the maintenance frame rod 1, the maintenance frame rod 2 and the telescopic adjustment sleeve. The connecting bolt is installed in the adjusting hole to fix the maintenance frame rod 1 and the maintenance frame rod 2 with the telescopic adjustment sleeve. The bottom end of the maintenance frame rod 1 is laterally provided with a maintenance frame installation cross bolt for hingedly connecting with the maintenance frame connecting sleeve.

[0015] Further preferably, a longitudinal connecting rod is connected between the maintenance frame rods of the telescopic rod to improve the supporting stability of the telescopic rod.

[0016] This precast concrete box girder maintenance device that can be assembled is light and simple, easy to install and disassemble, and can be quickly installed by ordinary workers, which improves the efficiency of maintenance construction, greatly reduces the overall steel consumption of the maintenance device, and saves construction costs. By adjusting the height and angle of the device's maintenance frame, and splicing multiple sections of the maintenance frame, it can be properly fitted with the box girder web and flange bottom plate for maintenance, and can adapt to precast box girders of different heights for maintenance. The atomizing nozzle in the maintenance device can rotate in multiple directions, so that there is no dead angle in the maintenance of the precast box girder, ensuring that the precast concrete box girder is fully maintained, which is conducive to controlling the strength and appearance quality of the concrete; after the maintenance device is used, it can be disassembled and transferred to the next precast beam site for maintenance operations, effectively reducing the cost of maintenance operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the application and installation structure of the precast concrete box girder maintenance device that can be assembled; Figure 2 It is a schematic diagram of the connection structure between the curing frame base and the curing frame; Figure 3 It is a structural schematic diagram of the base of the maintenance frame; Figure 4 This is a schematic diagram of the structure of the maintenance rack; Figure 5 It is a partially enlarged schematic diagram of the connection between the curing frame and the curing frame base; Figure 6 A schematic diagram of the connection between the angle-adjustable telescopic support rod and the maintenance frame base; The names of the parts corresponding to the serial numbers in the figure are: 1. Water tank; 2. Water pump; 3. Ultrasonic atomizer; 4. Water pipe; 5. Water pipe quick connector; 6. Spray system; 7. Maintenance vehicle; 8. Spray hose; 9. Maintenance rack; 10. Atomizing nozzle; 11. Angle-adjustable telescopic support rod; 12. Maintenance rack base; 13. Universal wheel; 14. Maintenance rack connecting sleeve; 15. Limiting hole; 16. Mounting hole; 17. Maintenance rack mounting cross bolt; 18. Maintenance rack rod one; 19. Telescopic adjustment sleeve; 20. Maintenance rack rod two; 21. Articulated sleeve; 22. Longitudinal connecting rod; 23. Transverse connecting rod; 24. Support rod one; 25. Adjustment hole; 26. Support rod telescopic adjustment sleeve; 27. Angle-adjustable telescopic support rod mounting cross bolt; 28. Support rod two; 29. ​​Connecting bolt; 30. Inverted U-shaped plug; 31. Limiting bolt. DETAILED DESCRIPTION

[0018] The technical solutions in the invention are clearly and completely described below in conjunction with the embodiments. The described embodiments are only a part of the present invention, rather than all the embodiments. Example

[0019] A precast concrete box girder maintenance device that can be assembled includes a spray system 6 and a maintenance vehicle 7. The spray system 6 is installed on the maintenance vehicle 7. The spray system 6 is connected to the water tank 1 through a water pipe 4 and a water pump 2. The maintenance vehicle 7 includes a maintenance frame 9, an angle-adjustable telescopic support rod 11 and a square maintenance frame base 12. The maintenance frame 9 includes a square frame composed of a longitudinal connecting rod 22 and a transverse connecting rod 23 fixedly connected. One side of the square frame is fixedly connected to a plurality of telescopic rods extending downward. The bottom end of the telescopic rod is provided with a maintenance frame installation cross bolt 17. The maintenance frame installation cross bolt 17 is extended along the length direction of the square frame. One side of the maintenance frame base 12 is fixedly provided at a position corresponding to the maintenance frame installation cross bolt 17. A maintenance frame connecting sleeve 14 is provided, and the maintenance frame connecting sleeve 14 is also extended along the length direction of the square frame. The maintenance frame mounting cross bolt 17 is inserted and hinged in the maintenance frame connecting sleeve 14. A limiting hole 15 is provided on the maintenance frame base 12 at the end of the maintenance frame connecting sleeve 14 where the maintenance frame mounting cross bolt 17 is inserted. The limiting hole 15 is inserted with a limiting bolt 31 for preventing the maintenance frame mounting cross bolt 17 from escaping from the maintenance frame connecting sleeve 14; a plurality of articulated sleeves 21 for articulating the angle-adjusting telescopic support rod 11 are provided on the other side of the square frame, the upper end of the angle-adjusting telescopic support rod 11 is hinged with the articulated sleeve 21, and the lower end of the angle-adjusting telescopic support rod 11 is inserted in the mounting hole 16 on the maintenance frame base 12.

[0020] A universal wheel 13 is installed at the bottom of the maintenance frame base 12.

[0021] The angle-adjustable telescopic support rod 11 includes a support rod 1 24, a support rod telescopic adjustment sleeve 26, a support rod 28 and a connecting bolt 29. The support rod 1 24 and the support rod 28 are telescopically connected through the support rod telescopic adjustment sleeve 26. The upper end of the support rod 1 24 and the lower end of the support rod 28 are respectively inserted into the support rod telescopic adjustment sleeve 26. Adjustment holes 25 are respectively provided on the support rod 1 24, the support rod 28 and the support rod telescopic adjustment sleeve 26. The connecting bolt 29 is installed in the adjusting hole 25 to fix the support rod 1 24 and the support rod 28 with the support rod telescopic adjustment sleeve 26. The top end of the support rod 28 is laterally provided with an angle-adjustable telescopic support rod mounting cross bolt 27 for being hinged to the hinge sleeve 21.

[0022] The bottom end of the support rod 1 24 is fixedly connected with an inverted U-shaped plug 30 for inserting into the mounting hole 16. The mounting hole 16 is set with two holes, and the inverted U-shaped plug 30 is inserted into the corresponding mounting hole 16 to allow the angle adjustment telescopic support rod 11 and the maintenance frame base 14 to form a stable support structure.

[0023] The spray system 6 includes a spray hose 8 and an atomizing nozzle 10. The atomizing nozzle 10 is installed on the maintenance frame 9. The spray hose 8 is connected to the atomizing nozzle 10. The spray hose 8 is connected to the water pipe 4 through the water pipe quick connector 5. The maintenance frame 9 is covered with a moisturizing geotextile. The moisturizing geotextile can be fixed with nylon tie or iron wire to ensure that the moisturizing geotextile does not fall off after absorbing water. The moisturizing geotextile covers the atomizing nozzle 10. A hole of appropriate size should be opened to ensure that the atomizing nozzle 10 passes through the moisturizing geotextile 9, so that the atomizing nozzle 10 can spray to the beam body. The atomizing nozzle adopts a universal atomizing nozzle, which is connected to the corresponding position of the spray hose 8 through a pipe joint. The spray hose 8 has a certain surplus length reserved to facilitate the normal operation of the maintenance device when the maintenance frame is raised.

[0024] The water pipe 4 is provided with an ultrasonic atomizer 3, which is installed on the water pipe 4 between the water pump 2 and the water pipe quick connector 5. The ultrasonic atomizer 3 is used to improve the atomization effect. The water pump 2 and the ultrasonic atomizer 3 are controlled by a PCL controller, which has the functions of timed spraying and automatic start of the spraying system.

[0025] The telescopic rod includes a maintenance frame rod 18, a telescopic adjustment sleeve 19, a maintenance frame rod 20 and a connecting bolt. The maintenance frame rod 18 and the maintenance frame rod 20 are telescopically connected through the telescopic adjustment sleeve 19. The upper end of the maintenance frame rod 18 and the lower end of the maintenance frame rod 20 are respectively inserted into the telescopic adjustment sleeve 19. Adjustment holes are respectively provided on the maintenance frame rod 18, the maintenance frame rod 20 and the telescopic adjustment sleeve 19. The connecting bolt is installed in the adjusting hole to fix the maintenance frame rod 18 and the maintenance frame rod 20 with the telescopic adjustment sleeve 19. The bottom end of the maintenance frame rod 18 is horizontally provided with a maintenance frame installation cross bolt 17 for hingedly connecting with the maintenance frame connecting sleeve 14.

[0026] A longitudinal connecting rod 22 is connected between the maintenance frame rod 18 of the telescopic rod to improve the supporting stability of the telescopic rod.

[0027] The application preparation process of the assembled precast concrete box girder maintenance device is as follows: Step 1: Cut materials according to the design size, and weld to make the maintenance frame base 12 and the angle-adjustable telescopic support rod 11, as well as the square frame and telescopic rod of the maintenance frame 9; install the universal wheel 13 at the bottom of the maintenance frame base 12.

[0028] Step 2: weld multiple curing frame connecting sleeves 14 at intervals along the length direction of the upper side of the curing frame base 12, and uniformly open a limiting hole 15 on the curing frame base 12 at one end of the curing frame connecting sleeve 14. The limiting hole 15 can also be pre-set when cutting and manufacturing the curing frame base 12.

[0029] Step 3: On one side of the square frame, extend the telescopic rod downward and weld it according to the spacing of the curing frame connecting sleeve 14 to ensure that the inclination of the telescopic rod is consistent with the inclination of the box beam web; on the other side of the square frame, weld multiple hinged sleeves 21 at intervals along its length direction.

[0030] Step 4: Lift or suspend the square frame and telescopic rod as a whole, insert the maintenance frame installation cross bolt 17 at the bottom of the telescopic rod into the maintenance frame connecting sleeve 14, and insert the limit bolt 31 into the limit hole 15 to prevent the maintenance frame installation cross bolt 17 from escaping from the maintenance frame connecting sleeve 14.

[0031] Step 5: Insert the angle-adjustable telescopic support rod mounting cross bolt 27 at the top of the angle-adjustable telescopic support rod 11 into the hinge sleeve 21 , and insert the bottom end of the angle-adjustable telescopic support rod 11 into the preset mounting hole of the maintenance frame base 12 .

[0032] Step 6: Install multiple rows of atomizing nozzles 10 on the telescopic rod side of the maintenance frame 9, connect the atomizing nozzles 10 to the spray hose 8, and then connect the spray hose 8 to the water pipe 4 through the water pipe quick connector 5.

[0033] Step seven, cover and install the moisturizing geotextile on the maintenance frame 9. The moisturizing geotextile can be fixed with nylon tie or wire to ensure that the moisturizing geotextile does not fall off after absorbing water. The moisturizing geotextile covers the atomizing nozzle 10 and a hole of appropriate size should be opened to ensure that the atomizing nozzle 10 passes through the moisturizing geotextile 9, so that the atomizing nozzle 10 can spray toward the beam body.

[0034] Step 8: Adjust the height of the angle-adjustable telescopic support rod 11 and the telescopic rod according to the height of the prefabricated box beam, so that the curing frame 9 is properly fitted with the web and flange bottom plate of the box beam, and adjust the angle of the atomizing nozzle 10; then start the spray curing.

[0035] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. An assembleable precast concrete box girder maintenance device, comprising a spray system (6) and a maintenance vehicle (7), wherein the spray system (6) is mounted on the maintenance vehicle (7), and the spray system (6) is connected to a water tank (1) via a water pipe (4) and a water pump (2), and characterized in that: The maintenance vehicle (7) comprises a maintenance frame (9), an angle-adjustable telescopic support rod (11) and a square maintenance frame base (12); the maintenance frame (9) comprises a square frame formed by a longitudinal connecting rod (22) and a transverse connecting rod (23) fixedly connected to each other; a plurality of telescopic rods extending downward are fixedly connected to one side of the square frame; a maintenance frame installation transverse bolt (17) is provided at the bottom end of the telescopic rod; a maintenance frame connecting sleeve (14) is fixedly provided on one side of the maintenance frame base (12) at a position corresponding to the maintenance frame installation transverse bolt (17); the maintenance frame installation transverse bolt (17) is inserted and hinged on the maintenance frame connecting sleeve (14) A limiting hole (15) is provided on the maintenance frame base (12) at the end of the maintenance frame connecting sleeve (14) inserted into the maintenance frame installation transverse bolt (17), and a limiting bolt (31) is inserted into the limiting hole (15) for preventing the maintenance frame installation transverse bolt (17) from coming out of the maintenance frame connecting sleeve (14); a plurality of hinged sleeves (21) for hingedly connecting the angle-adjustable telescopic support rod (11) are provided on the other side of the square frame, the upper end of the angle-adjustable telescopic support rod (11) is hingedly connected to the hinged sleeve (21), and the lower end of the angle-adjustable telescopic support rod (11) is inserted into the installation hole (16) on the maintenance frame base (12).

2. The assembleable precast concrete box girder maintenance device according to claim 1 is characterized in that: A universal wheel (13) is installed at the bottom of the maintenance frame base (12).

3. The assembleable precast concrete box girder maintenance device according to claim 1 is characterized in that: The angle-adjustable telescopic support rod (11) comprises a support rod 1 (24), a support rod telescopic adjustment sleeve (26), a support rod 2 (28) and a connecting bolt (29). The support rod 1 (24) and the support rod 2 (28) are telescopically connected via a sleeve of the support rod telescopic adjustment sleeve (26). The upper end of the support rod 1 (24) and the lower end of the support rod 2 (28) are respectively sleeved in the support rod telescopic adjustment sleeve (26). The support rod 1 (24), the support rod 2 (28) and the support rod telescopic adjustment sleeve (26) are respectively provided with adjustment holes (25). The connecting bolt (29) is installed in the adjustment hole (25) to fix the support rod 1 (24) and the support rod 2 (28) to the support rod telescopic adjustment sleeve (26). The top end of the support rod 2 (28) is transversely provided with an angle-adjustable telescopic support rod mounting transverse bolt (27) for being hinged to the sleeve of the hinge sleeve (21).

4. The assembleable precast concrete box girder maintenance device according to claim 3 is characterized in that: The bottom end of the support rod 1 (24) is fixedly connected to an inverted U-shaped plug (30) for being inserted into the mounting hole (16).

5. The assembleable precast concrete box girder maintenance device according to claim 1 is characterized in that: The spray system (6) comprises a spray hose (8) and an atomizing nozzle (10), wherein the atomizing nozzle (10) is mounted on a maintenance frame (9), the spray hose (8) is connected to the atomizing nozzle (10), and the spray hose (8) is connected to a water pipe (4) via a water pipe quick connector (5).

6. The assembleable precast concrete box girder maintenance device according to claim 1 or 5, characterized in that: The water delivery pipe (4) is equipped with an ultrasonic atomizer (3), and the ultrasonic atomizer (3) is installed on the water delivery pipe (4) between the water pump (2) and the water pipe quick connector (5).

7. The assembleable precast concrete box girder maintenance device according to claim 1 is characterized in that: The telescopic rod comprises a maintenance frame rod 1 (18), a telescopic adjustment sleeve (19), a maintenance frame rod 2 (20) and a connecting bolt. The maintenance frame rod 1 (18) and the maintenance frame rod 2 (20) are telescopically connected by being inserted into the telescopic adjustment sleeve (19). The upper end of the maintenance frame rod 1 (18) and the lower end of the maintenance frame rod 2 (20) are respectively inserted into the telescopic adjustment sleeve (19). Adjustment holes are respectively provided on the maintenance frame rod 1 (18), the maintenance frame rod 2 (20) and the telescopic adjustment sleeve (19). The connecting bolt is installed in the adjustment hole to fix the maintenance frame rod 1 (18) and the maintenance frame rod 2 (20) with the telescopic adjustment sleeve (19). A maintenance frame installation cross bolt (17) for hinged connection with the maintenance frame connecting sleeve (14) is horizontally provided at the bottom end of the maintenance frame rod 1 (18).

8. The assembleable precast concrete box girder maintenance device according to claim 7 is characterized in that: A longitudinal connecting rod (22) is connected between the maintenance frame rod (18) of the telescopic rod to improve the supporting stability of the telescopic rod.

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