Expansion joint maintenance device for bridge engineering

Abstract

The invention belongs to the technical field of bridge engineering, and discloses an expansion joint maintenance device for bridge engineering, which comprises a maintenance vehicle, universal wheels and a push rod, the universal wheels are arranged at four corners of the bottom of the maintenance vehicle, and the push rod is fixedly mounted on the right side of the maintenance vehicle. According to the device, foreign matters are scraped through the scraping head, when the device encounters stubborn foreign matters, the scraping head and the moving rod can stretch out and draw back into the moving seat, the plug is opened through transmission of the sealing rod, it is ensured that the spraying head sprays the foreign matter accumulation area, the foreign matter accumulation area is softened and loosened, and compared with a traditional device, the device is more convenient to use. According to the device, the expansion joint can be cleaned through rotation of the cleaning brush roller, stubborn foreign matter can be sensed through arrangement of the scraping head, the foreign matter is softened and loosened in a water spraying mode after the scraping head is triggered, the cleaning and maintaining efficiency is guaranteed, meanwhile, water resources are saved in an intermittent water spraying mode, and the device is efficient and environmentally friendly.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge engineering, and in particular relates to an expansion joint maintenance device used in bridge engineering. Background Art

[0002] Bridge engineering is a complex and extensive field, involving multiple links such as bridge survey, design, construction, maintenance and verification. It is an important branch of civil engineering. During the construction of a bridge, in order to meet the requirements of bridge deck deformation, expansion joints are usually set between the two beam ends, between the beam ends and the abutments, or at the hinged positions of the bridge. Expansion joints can adapt to the displacement and deformation of the bridge structure caused by temperature changes, concrete shrinkage, creep, vehicle loads and other factors, and are an indispensable part of bridge engineering.

[0003] After the construction of the bridge is completed, the expansion joints need to be maintained regularly. This is because when a large amount of debris accumulates in the expansion joints, it will hinder its normal expansion and contraction function, resulting in uneven force on the bridge, deformation of the bridge deck and even cracks, endangering the normal operation of the bridge and driving safety. Therefore, regular cleaning and maintenance are required to ensure the safe use of the bridge.

[0004] Current expansion joint cleaning and maintenance devices are usually carried out by cleaning brushes or spraying. Although this maintenance method of cleaning with a brush is suitable for most scenarios, when dirt and dust dry inside the expansion joint, the rotation of the brush will generate a large amount of dust, and the cleaning efficiency is poor. Cleaning by spraying will consume a lot of water resources and is not environmentally friendly. Therefore, it needs to be improved and optimized. Summary of the invention

[0005] The object of the present invention is to provide an expansion joint maintenance device for bridge engineering to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solutions: an expansion joint maintenance device for bridge engineering, comprising a maintenance vehicle, universal wheels and a push rod, wherein the four corners of the bottom of the maintenance vehicle are all provided with universal wheels, a push rod is fixedly installed on the right side of the maintenance vehicle, a cleaning brush roller is arranged inside the maintenance vehicle, a water tank is fixedly installed on the top of the maintenance vehicle, and an observation window is opened on the front side of the water tank;

[0007] A guide groove is provided on the left side of the maintenance vehicle, a movable seat is movably installed inside the guide groove, a water storage tank is fixedly installed inside the movable seat, a nozzle is fixedly installed on the left side of the movable seat, the nozzle and the water storage tank are connected with each other, a plug is movably installed inside the nozzle, a water outlet groove is provided inside the plug, a sealing rod is fixedly installed on the right end of the plug, one end of the sealing rod passes through the outside of the water storage tank, and a movable rod is fixedly installed on the bottom of the sealing rod, the movable rod is movably installed below the movable seat, and a scraper head is fixedly installed on the left end of the movable rod.

[0008] Preferably, rotating rods are rotatably installed on the front and rear sides inside the maintenance vehicle, a connecting rod is fixedly installed between the two groups of rotating rods, a worm gear is fixedly installed on the middle part of the connecting rod, a shell is fixedly installed on the left end of the rotating rod, a cleaning brush roller is rotatably installed inside the shell, a worm is rotatably installed inside the maintenance vehicle, the worm and the worm gear are drivingly connected, a second motor is fixedly installed on the top of the maintenance vehicle, and the output shaft of the second motor is fixedly connected to the worm.

[0009] Preferably, an air inlet is fixedly installed on the front side of the maintenance vehicle, an ash bucket is fixedly installed on the front side of the air inlet, a bottom cover is provided at the bottom of the ash bucket, an induced draft fan is fixedly installed on the top of the ash bucket, and a filter plate is fixedly installed inside the ash bucket.

[0010] Preferably, a screw rod is rotatably installed inside the guide groove, the screw rod and the movable seat are threadedly sleeved, and a knob is rotatably installed on the top of the maintenance vehicle, and the knob and the screw rod are fixedly connected.

[0011] Preferably, a high-pressure water pump is fixedly installed on the top of the movable seat, one end of the high-pressure water pump is connected to the water storage tank, and a rubber water pipe is fixedly installed on the other end of the high-pressure water pump, and the rubber water pipe is connected to the water tank.

[0012] Preferably, one end of the sealing rod penetrates into the interior of the movable seat, and one end of the sealing rod and the inner wall of the movable seat are elastically connected via a spring.

[0013] Preferably, a first motor is fixedly installed inside the housing, and an output shaft of the first motor is fixedly connected to the cleaning brush roller.

[0014] Preferably, arc-shaped grooves are provided on both the front and rear sides of the inner wall of the maintenance vehicle, and both the front and rear ends of the outer shell are movably mounted inside the arc-shaped grooves.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention scrapes away foreign matter by a scraper head, and when encountering stubborn foreign matter, the scraper head and the moving rod will be extended to the inside of the moving seat, and the plug will be opened through the transmission of the sealing rod to ensure that the nozzle sprays the area where foreign matter accumulates to soften and loosen it. Compared with the traditional device, the device can clean the expansion joint by rotating the cleaning brush roller, and can also sense stubborn foreign matter through the setting of the scraper head, and soften and loosen the foreign matter by spraying water after the scraper head is triggered, thereby ensuring the efficiency of cleaning and maintenance. At the same time, it saves water resources by intermittent water spraying, making the device efficient and environmentally friendly.

[0017] 2. The present invention arranges a worm and a worm wheel so that when the second motor is in operation, the connecting rod and the rotating rod rotate to drive the outer shell to move, and further the outer shell slides along the arc groove to complete the adjustment of the position of the cleaning brush roller. Compared with the traditional device, the device can control the operation of the second motor to move the outer shell along the arc groove, thereby ensuring that the cleaning brush roller is always located inside the expansion joint, providing guarantee for the efficient cleaning of the cleaning brush roller and reducing the adjustment burden of the staff.

[0018] 3. The present invention uses the operation of the induced draft fan to allow the dust-laden airflow generated by the operation of the cleaning brush roller to enter the ash bin through the air inlet, and the dust will be isolated by the filter plate, and the clean air will be discharged from the induced draft fan. Compared with the traditional device, the device can provide a negative pressure environment for the working area of ​​the cleaning brush roller when cleaning and maintaining the expansion joint of the bridge, effectively avoiding dust, and dust will accumulate in the ash bin. The staff can open the bottom cover to centrally process the dust, thereby ensuring the working environment and having high environmental protection benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the worm structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the screw rod structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the plug structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the sealing rod structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the connecting rod structure of the present invention;

[0025] Figure 7 This is a schematic diagram of the housing structure of the present invention;

[0026] Figure 8 It is a schematic diagram of the filter plate structure of the present invention.

[0027] In the figure: 1. maintenance vehicle; 2. universal wheel; 3. push rod; 4. cleaning brush roller; 5. water tank; 6. observation window; 7. guide groove; 8. screw rod; 9. knob; 10. moving seat; 11. high-pressure water pump; 12. rubber water pipe; 13. water storage tank; 14. sealing rod; 15. plug; 16. water outlet trough; 17. nozzle; 18. spring; 19. moving rod; 20. scraper; 21. rotating rod; 22. connecting rod; 23. worm gear; 24. housing; 25. first motor; 26. arc groove; 27. second motor; 28. worm; 29. ​​air inlet; 30. ash storage bucket; 31. bottom cover; 32. induced draft fan; 33. filter plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 8 As shown, an embodiment of the present invention provides an expansion joint maintenance device for bridge engineering, comprising a maintenance vehicle 1, universal wheels 2 and a push rod 3, wherein the four corners of the bottom of the maintenance vehicle 1 are all provided with universal wheels 2, the right side of the maintenance vehicle 1 is fixedly installed with a push rod 3, a cleaning brush roller 4 is provided inside the maintenance vehicle 1, a water tank 5 is fixedly installed on the top of the maintenance vehicle 1, and an observation window 6 is provided on the front side of the water tank 5;

[0030] A guide groove 7 is provided on the left side of the maintenance vehicle 1, and a movable seat 10 is movably installed inside the guide groove 7, a water storage tank 13 is fixedly installed inside the movable seat 10, a nozzle 17 is fixedly installed on the left side of the movable seat 10, the nozzle 17 and the water storage tank 13 are connected to each other, a plug 15 is movably installed inside the nozzle 17, a water outlet trough 16 is provided inside the plug 15, a sealing rod 14 is fixedly installed on the right end of the plug 15, one end of the sealing rod 14 passes through the outside of the water storage tank 13, and a movable rod 19 is fixedly installed on the bottom of the sealing rod 14, the movable rod 19 is movably installed below the movable seat 10, and a scraper head 20 is fixedly installed on the left end of the movable rod 19.

[0031] When it is necessary to clean and maintain the expansion joint of the bridge, the staff moves the maintenance vehicle 1 to one end of the expansion joint, and then rotates the knob 9 to rotate the screw rod 8. The further moving seat 10 will move downward along the guide groove 7, so that the scraper head 20 extends into the expansion joint, and then the high-pressure water pump 11 and the first motor 25 are started. At this time, the nozzle 17 is blocked by the plug 15 and will not spray water. The operation of the first motor 25 will drive the cleaning brush roller 4 to rotate to clean the expansion joint. The staff pushes the maintenance vehicle 1 to move along the expansion joint. At this time, the scraper head 20 is located inside the expansion joint and will scrape the foreign matter in the expansion joint to loosen it. When encountering particularly stubborn foreign matter such as dried mud, the scraper head 20 It cannot be pushed, and as the maintenance vehicle 1 moves, the scraper head 20 and the moving rod 19 will extend into the interior of the moving seat 10, and at this time the spring 18 will be squeezed, and the sealing rod 14 will pull the plug 15 out to the interior of the water storage tank 13. Further, the high-pressure water pump 11 will transport the water in the water tank 5 to the interior of the water storage tank 13 through the water storage tank 13, and the water will be sprayed out from the nozzle 17 through the water outlet trough 16 to spray the foreign matter to loosen and soften it. After the foreign matter is loosened, the scraper head 20 and the moving rod 19 are reset by the elastic potential energy of the spring 18. At the same time, the plug 15 will block the nozzle 17 again. As the maintenance vehicle 1 moves, the cleaning brush roller 4 will sweep out the softened foreign matter to complete the cleaning and maintenance operation.

[0032] The foreign matter is scraped off by the scraper head 20, and when encountering stubborn foreign matter, the scraper head 20 and the moving rod 19 will be extended to the inside of the moving seat 10, and the plug 15 will be opened through the transmission of the sealing rod 14, ensuring that the nozzle 17 sprays the area where foreign matter accumulates to soften and loosen it. Compared with the traditional device, the device can clean the expansion joint by rotating the cleaning brush roller 4, and can also sense stubborn foreign matter through the setting of the scraper head 20, and soften and loosen the foreign matter by spraying water after the scraper head 20 is triggered, thereby ensuring the efficiency of cleaning and maintenance, and saving water resources by intermittent water spraying, making the device efficient and environmentally friendly.

[0033] Among them, rotating rods 21 are rotatably installed on the front and rear sides inside the maintenance vehicle 1, a connecting rod 22 is fixedly installed between the two groups of rotating rods 21, a worm gear 23 is fixedly installed in the middle of the connecting rod 22, a shell 24 is fixedly installed on the left end of the rotating rod 21, a cleaning brush roller 4 is rotatably installed inside the shell 24, a worm 28 is rotatably installed inside the maintenance vehicle 1, the worm 28 and the worm gear 23 are transmission-connected, a second motor 27 is fixedly installed on the top of the maintenance vehicle 1, and the output shaft of the second motor 27 is fixedly connected to the worm 28.

[0034] Before cleaning and maintaining the expansion joint, the staff can first observe whether the cleaning brush roller 4 is located inside the expansion joint. When the distance between the cleaning brush roller 4 and the expansion joint is large, the staff starts the second motor 27, and the second motor 27 drives the worm 28 to rotate, so that the worm 28 drives the worm wheel 23 meshing with it to rotate, and further the connecting rod 22 and the rotating rod 21 rotate. As the rotating rod 21 rotates, the outer shell 24 will slide along the arc groove 26, further completing the adjustment of the cleaning brush roller 4 to ensure that the cleaning brush roller 4 deeply cleans the expansion joint.

[0035] By setting the worm 28 and the worm wheel 23, when the second motor 27 is in operation, the connecting rod 22 and the rotating rod 21 rotate to drive the outer shell 24 to move, and further the outer shell 24 slides along the arc groove 26 to complete the adjustment of the position of the cleaning brush roller 4. Compared with the traditional device, the device can control the operation of the second motor 27 to displace the outer shell 24 along the arc groove 26, thereby ensuring that the cleaning brush roller 4 is always located inside the expansion joint, providing guarantee for the efficient cleaning of the cleaning brush roller 4 and reducing the adjustment burden of the staff.

[0036] Among them, an air inlet 29 is fixedly installed on the front side of the maintenance vehicle 1, an ash bucket 30 is fixedly installed on the front side of the air inlet 29, a bottom cover 31 is provided at the bottom of the ash bucket 30, a draft fan 32 is fixedly installed on the top of the ash bucket 30, and a filter plate 33 is fixedly installed inside the ash bucket 30.

[0037] In a dry environment, the operation of the cleaning brush roller 4 will generate a large amount of dust. At this time, the staff can start the induced draft fan 32. The operation of the induced draft fan 32 will absorb the dust generated by the cleaning brush roller 4 through the air inlet 29. At this time, the dust-laden airflow will enter the interior of the ash storage bucket 30 through the air inlet 29, and when passing through the filter plate 33, the dust is isolated inside the ash storage bucket 30. Finally, the clean airflow will be discharged through the exhaust port of the induced draft fan 32. At this time, the dust will accumulate inside the ash storage bucket 30. After the staff finishes the work, the bottom cover 31 can be opened to complete the dust unloading operation.

[0038] Through the operation of the induced draft fan 32, the dust-containing airflow generated by the operation of the cleaning brush roller 4 will enter the ash bin 30 through the air inlet 29, and the dust will be isolated by the filter plate 33, and the clean air will be discharged from the induced draft fan 32. Compared with the traditional device, the device can provide a negative pressure environment for the working area of ​​the cleaning brush roller 4 when cleaning and maintaining the expansion joint of the bridge, effectively avoiding dust, and dust will accumulate in the ash bin 30. The staff can open the bottom cover 31 to centrally process the dust, thereby ensuring the working environment and having high environmental protection benefits.

[0039] A screw rod 8 is rotatably installed inside the guide groove 7, and the screw rod 8 is threadedly sleeved with the moving seat 10. A knob 9 is rotatably installed on the top of the maintenance vehicle 1, and the knob 9 and the screw rod 8 are fixedly connected.

[0040] The staff rotates the knob 9 to rotate the screw rod 8, and the further moving seat 10 will move downward along the guide groove 7.

[0041] Among them, a high-pressure water pump 11 is fixedly installed on the top of the movable seat 10, one end of the high-pressure water pump 11 is connected to the water storage tank 13, and the other end of the high-pressure water pump 11 is fixedly installed with a rubber water pipe 12, and the rubber water pipe 12 is connected to the water tank 5.

[0042] By setting the high-pressure water pump 11 , when the plug 15 is opened, water will be pumped into the water storage tank 13 through the rubber water pipe 12 and sprayed out from the nozzle 17 .

[0043] One end of the sealing rod 14 penetrates into the interior of the moving seat 10 , and one end of the sealing rod 14 and the inner wall of the moving seat 10 are elastically connected via a spring 18 .

[0044] By setting the spring 18, after the stubborn foreign matter is softened, the scraper head 20 is reset to stop the spray head 17 from spraying water.

[0045] A first motor 25 is fixedly installed inside the housing 24 , and an output shaft of the first motor 25 is fixedly connected to the cleaning brush roller 4 .

[0046] The front and rear sides of the inner wall of the maintenance vehicle 1 are both provided with arc grooves 26 , and the front and rear ends of the outer shell 24 are both movably mounted inside the arc grooves 26 .

[0047] The staff can control the operation of the second motor 27 to move the housing 24 along the arc groove 26 to complete the adjustment of the position of the cleaning brush roller 4 .

[0048] Working principle and usage process:

[0049] When it is necessary to clean and maintain the expansion joint of the bridge, the staff moves the maintenance vehicle 1 to one end of the expansion joint, and then rotates the knob 9 to rotate the screw rod 8. The further moving seat 10 will move downward along the guide groove 7, so that the scraper head 20 extends into the expansion joint, and then the high-pressure water pump 11 and the first motor 25 are started. At this time, the nozzle 17 is blocked by the plug 15 and will not spray water. The operation of the first motor 25 will drive the cleaning brush roller 4 to rotate to clean the expansion joint. The staff pushes the maintenance vehicle 1 to move along the expansion joint. At this time, the scraper head 20 is located inside the expansion joint and will scrape the foreign matter in the expansion joint to loosen it. When encountering particularly stubborn foreign matter such as dried mud, the scraper head 20 It cannot be pushed, and as the maintenance vehicle 1 moves, the scraper head 20 and the moving rod 19 will extend into the interior of the moving seat 10, and at this time the spring 18 will be squeezed, and the sealing rod 14 will pull the plug 15 out to the interior of the water storage tank 13. Further, the high-pressure water pump 11 will transport the water in the water tank 5 to the interior of the water storage tank 13 through the water storage tank 13, and the water will be sprayed out from the nozzle 17 through the water outlet trough 16 to spray the foreign matter to loosen and soften it. After the foreign matter is loosened, the scraper head 20 and the moving rod 19 are reset by the elastic potential energy of the spring 18. At the same time, the plug 15 will block the nozzle 17 again. As the maintenance vehicle 1 moves, the cleaning brush roller 4 will sweep out the softened foreign matter to complete the cleaning and maintenance operation.

[0050] Before cleaning and maintaining the expansion joint, the staff can first observe whether the cleaning brush roller 4 is located inside the expansion joint. When the distance between the cleaning brush roller 4 and the expansion joint is large, the staff starts the second motor 27, and the second motor 27 drives the worm 28 to rotate, so that the worm 28 drives the worm wheel 23 meshing with it to rotate, and further the connecting rod 22 and the rotating rod 21 rotate. As the rotating rod 21 rotates, the outer shell 24 will slide along the arc groove 26, further completing the adjustment of the cleaning brush roller 4 to ensure that the cleaning brush roller 4 deeply cleans the expansion joint.

[0051] In a dry environment, the operation of the cleaning brush roller 4 will generate a large amount of dust. At this time, the staff can start the induced draft fan 32. The operation of the induced draft fan 32 will absorb the dust generated by the cleaning brush roller 4 through the air inlet 29. At this time, the dust-laden airflow will enter the interior of the ash storage bucket 30 through the air inlet 29, and when passing through the filter plate 33, the dust is isolated inside the ash storage bucket 30. Finally, the clean airflow will be discharged through the exhaust port of the induced draft fan 32. At this time, the dust will accumulate inside the ash storage bucket 30. After the staff finishes the work, the bottom cover 31 can be opened to complete the dust unloading operation.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An expansion joint maintenance device for bridge engineering, comprising a maintenance vehicle (1), a universal wheel (2) and a push rod (3), characterized in that: Universal wheels (2) are arranged at the four corners of the bottom of the maintenance vehicle (1), a push rod (3) is fixedly installed on the right side of the maintenance vehicle (1), a cleaning brush roller (4) is arranged inside the maintenance vehicle (1), a water tank (5) is fixedly installed on the top of the maintenance vehicle (1), and an observation window (6) is opened on the front side of the water tank (5); The left side of the maintenance vehicle (1) is provided with a guide groove (7), a movable seat (10) is movably installed inside the guide groove (7), a water storage tank (13) is fixedly installed inside the movable seat (10), a nozzle (17) is fixedly installed on the left side of the movable seat (10), the nozzle (17) and the water storage tank (13) are connected to each other, a plug (15) is movably installed inside the nozzle (17), a water outlet groove (16) is provided inside the plug (15), a sealing rod (14) is fixedly installed at the right end of the plug (15), one end of the sealing rod (14) passes through the outside of the water storage tank (13), and a movable rod (19) is fixedly installed at the bottom of the sealing rod (14), the movable rod (19) is movably installed below the movable seat (10), and a scraper (20) is fixedly installed at the left end of the movable rod (19).

2. The expansion joint maintenance device for bridge engineering according to claim 1, characterized in that: The maintenance vehicle (1) has rotating rods (21) rotatably mounted on both the front and rear sides thereof, a connecting rod (22) fixedly mounted between the two groups of rotating rods (21), a worm gear (23) fixedly mounted in the middle of the connecting rod (22), a housing (24) fixedly mounted on the left end of the rotating rod (21), a cleaning brush roller (4) rotatably mounted inside the housing (24), a worm gear (28) rotatably mounted inside the maintenance vehicle (1), the worm gear (28) and the worm gear (23) being transmission-connected, a second motor (27) fixedly mounted on the top of the maintenance vehicle (1), an output shaft of the second motor (27) and the worm gear (28) being fixedly connected.

3. The expansion joint maintenance device for bridge engineering according to claim 1 is characterized in that: An air inlet (29) is fixedly installed on the front side of the maintenance vehicle (1), an ash bucket (30) is fixedly installed on the front side of the air inlet (29), a bottom cover (31) is provided at the bottom of the ash bucket (30), an induced draft fan (32) is fixedly installed on the top of the ash bucket (30), and a filter plate (33) is fixedly installed inside the ash bucket (30).

4. The expansion joint maintenance device for bridge engineering according to claim 1, characterized in that: A screw rod (8) is rotatably mounted inside the guide groove (7), and the screw rod (8) and the movable seat (10) are threadedly sleeved. A knob (9) is rotatably mounted on the top of the maintenance vehicle (1), and the knob (9) and the screw rod (8) are fixedly connected.

5. The expansion joint maintenance device for bridge engineering according to claim 1, characterized in that: A high-pressure water pump (11) is fixedly mounted on the top of the movable seat (10), one end of the high-pressure water pump (11) is in communication with a water storage tank (13), and a rubber water pipe (12) is fixedly mounted on the other end of the high-pressure water pump (11), and the rubber water pipe (12) is in communication with a water tank (5).

6. The expansion joint maintenance device for bridge engineering according to claim 1, characterized in that: One end of the sealing rod (14) penetrates into the interior of the movable seat (10), and one end of the sealing rod (14) and the inner wall of the movable seat (10) are elastically connected via a spring (18).

7. The expansion joint maintenance device for bridge engineering according to claim 2, characterized in that: A first motor (25) is fixedly installed inside the housing (24), and an output shaft of the first motor (25) is fixedly connected to the cleaning brush roller (4).

8. The expansion joint maintenance device for bridge engineering according to claim 2, characterized in that: The front and rear sides of the inner wall of the maintenance vehicle (1) are both provided with arc-shaped grooves (26), and the front and rear ends of the outer shell (24) are both movably mounted inside the arc-shaped grooves (26).

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