A ring-shaped cylindrical member repair and spraying device for roads and bridges

Abstract

This invention provides a ring-shaped cylindrical member painting device for road and bridge applications, relating to the field of road and bridge engineering. The device includes: an opening and closing bracket with a ring-shaped structure that can be opened and closed; and climbing wheels distributed circumferentially within the opening and closing bracket. Several climbing wheels contact the outer wall of the cylindrical member and roll along its axial direction. The opening and closing bracket is ringed around the outside of the cylindrical member via the climbing wheels. When the climbing wheels rotate slightly with their housings, they can form a spiral motion trajectory when tilted relative to the member's axis. During this spiral movement, the brush and nozzle sweep away dust for thorough cleaning, and the nozzle sprays onto the clean area already swept by the brush, ensuring painting quality. This solves the problems of low efficiency and high safety risks associated with traditional high-altitude painting operations, achieving automated painting of cylindrical members.

Description

Technical Field

[0001] This invention relates to the field of roads and bridges, specifically to a ring-shaped cylindrical member repair and spraying device for roads and bridges. Background Technology

[0002] As a core component of transportation infrastructure, roads and bridges encompass engineering structures such as viaducts, interchanges, cable-stayed bridges, suspension bridges, and various municipal bridges. Their piers, towers, and inclined legs largely utilize vertical or inclined cylindrical members, bearing crucial roles in load-bearing, support, and structural stability. These cylindrical members are mostly steel or concrete-finished structures, and long-term exposure to the elements makes them susceptible to sun, rain, wind, sand, and corrosive media, leading to problems such as paint peeling, rust, and weathering. Therefore, regular touch-up painting is necessary to achieve corrosion protection, extend the structural lifespan, and ensure a clean appearance. Currently, common touch-up painting methods mainly involve manual high-altitude brushing and handheld spray guns, which suffer from low work efficiency, uneven spraying, high safety risks, and high labor intensity.

[0003] When applying paint to the cylindrical members of a bridge, manual high-altitude work is usually the main method. Construction workers need to use climbing equipment, baskets, or climbing facilities to carry out the spraying work with handheld spray guns or brushes. This is not only labor-intensive and inefficient, but also difficult to meet the needs of rapid maintenance of long-distance and high-altitude cylindrical members. In addition, high-altitude construction poses a high safety hazard. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a ring-shaped cylindrical member touch-up paint spraying device for roads and bridges, which solves the problems of high-altitude operation for touch-up paint spraying, which is not only labor-intensive and inefficient but also poses significant safety hazards.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a ring-shaped cylindrical member repair and spraying device for roads and bridges, comprising:

[0006] The opening and closing bracket has a wraparound structure and can be opened and closed.

[0007] The climbing wheels are distributed in a circle within the opening and closing bracket. Several climbing wheels are used to contact the outer wall of the cylindrical member and roll along the axial direction of the cylindrical member. The opening and closing bracket is wrapped around the outside of the cylindrical member by the climbing wheels.

[0008] A spraying assembly, fixed relative to the opening and closing bracket, is used to spray paint onto the surface of cylindrical rods;

[0009] When the climbing wheel is tilted relative to the axis of the cylindrical member, the climbing wheel forms a spiral motion trajectory along the outer wall of the cylindrical member.

[0010] Preferably, the opening and closing bracket includes a fixed support arm and two movable support arms. Both ends of the fixed support arm are rotatably connected to a connecting shaft. Both connecting shafts pass through the movable support arms that are close to them and are rotatably connected to the movable support arms. The other ends of the two movable support arms are detachably connected by fastening bolts.

[0011] Preferably, the spraying assembly includes a storage tank, a miniature airless pump, pipelines, and nozzles. The storage tank is connected to the input end of the miniature airless pump via the pipelines, and the output end of the miniature airless pump is connected to the nozzles via the pipelines.

[0012] Preferably, both the fixed support arm and the two movable support arms are fixedly connected to a sleeve, and an adjusting rod for rotation is installed inside the sleeve. One end of the adjusting rod is fixedly connected to a wheel housing, and the climbing wheel is rotatably installed in the wheel housing. Each sleeve has two symmetrical limiting grooves inside, and a limiting post fixed to the adjusting rod is slidably connected in the limiting groove.

[0013] Preferably, the climbing wheel includes a fixed wheel body and an annular pad. The wheel body is rotatably connected to the wheel shell, the annular pad is located on the outermost ring of the wheel body, and the annular pad can produce elastic deformation when it is pressed against the outer wall of the cylindrical rod.

[0014] Preferably, one end of each sleeve is rotatably connected to a limiting cylinder, the adjusting rod is slidably connected to the limiting cylinder, one end of the adjusting rod is provided with a groove, the inside of the limiting cylinder has a long strip-shaped protrusion structure, the protrusion of the limiting cylinder is slidably connected to the groove, one end of each of the three limiting cylinders is fixedly connected to a bevel gear, one side of the opening and closing bracket is provided with an arc-shaped plate for rotation, the outer side of the arc-shaped plate is fixedly connected to an arc-shaped bevel rack, and the three arc-shaped bevel racks are respectively meshed with the three bevel gears.

[0015] Preferably, the arc-shaped plate has two arc-shaped grooves inside, and two connecting shafts are slidably connected to the two arc-shaped grooves respectively. One end of each connecting shaft is fixedly connected to a baffle for resisting the arc-shaped plate.

[0016] Preferably, the outer side of the arc-shaped plate is provided with a number of equally spaced toothed grooves, and a micro drive motor is fixedly connected to the opening and closing bracket. The output shaft of the micro drive motor is fixedly connected to a drive gear that meshes with the toothed grooves.

[0017] Preferably, a fixing block is fixedly connected to the opening and closing bracket, a positioning rod slides inside the fixing block, a spring is fixedly connected between the head of the positioning rod and the fixing block, and two positioning holes are opened on one side of the arc plate. When the positioning hole is rotated to the positioning hole with the arc plate, the positioning rod is inserted into the positioning hole through the spring.

[0018] Preferably, a brush is fixedly installed on the opening and closing bracket, and the brush head is used to contact the cylindrical rod.

[0019] Compared with existing technologies, this invention has the following advantages: A closable, ring-shaped support bracket, combined with circumferentially distributed climbing wheels, enables the ring-shaped installation of cylindrical members. The climbing wheels contact the outer wall of the member for support and movement, while the spraying assembly is fixed to the bracket to complete the touch-up painting operation. When the climbing wheels rotate slightly with the wheel housing, they move slightly, allowing the annular pad to compress and deform the cylindrical member, increasing the contact area and friction. Furthermore, the climbing wheels can tilt relative to the member's axis, creating a spiral trajectory during rolling. As the brush and nozzle move spirally, the brush effectively cleans dust, and the nozzle sprays onto the clean area already cleaned by the brush, ensuring spray quality. This solves the problems of low efficiency and high safety risks associated with traditional high-altitude paint touch-up operations, achieving automated painting of cylindrical members. Attached Figure Description

[0020] Figure 1 This is a front view of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the opening and closing bracket of the present invention surrounding the outer side of the cylindrical member;

[0022] Figure 3 This is a schematic diagram of the climbing wheel of the present invention compressing and deforming a cylindrical rod;

[0023] Figure 4 This is a schematic diagram of the climbing wheel of the present invention when it tilts and compresses the cylindrical rod, causing deformation.

[0024] Figure 5 This is a schematic diagram of the structure of the sleeve of the present invention;

[0025] Figure 6 This is a schematic diagram of the opening and closing bracket of the present invention;

[0026] Figure 7 This is a cross-sectional view of the sleeve, adjusting rod, and limiting cylinder of the present invention;

[0027] Figure 8 This is a cross-sectional view of the positioning rod of the present invention not inserted into the positioning hole;

[0028] Figure 9 This is a cross-sectional view of the positioning rod of the present invention inserted into the positioning hole;

[0029] Figure 10 This is a cross-sectional view of the climbing wheel of the present invention;

[0030] Figure 11 This is a sectional view of the top view of the adjusting rod and the limiting cylinder of the present invention.

[0031] The components include: 1. Opening and closing bracket; 101. Fixed support arm; 102. Movable support arm; 103. Connecting shaft; 2. Climbing wheel; 201. Wheel body; 202. Annular pad; 3. Spraying assembly; 301. Storage box; 302. Miniature airless pump; 303. Nozzle; 4. Sleeve; 5. Adjusting rod; 6. Wheel housing; 7. Limiting groove; 8. Limiting post; 9. Limiting cylinder; 10. Bevel gear; 11. Arc plate; 12. Arc-shaped bevel rack; 13. Arc groove; 14. Baffle; 15. Gear groove; 16. Drive gear; 17. Positioning rod; 18. Spring; 19. Positioning hole; 20. Brush. Detailed Implementation

[0032] like Figures 1-11 As shown, a ring-shaped cylindrical member paint repair spraying device for roads and bridges includes:

[0033] The opening and closing bracket 1 has a ring-shaped structure and can be opened and closed. The opening and closing bracket 1 includes a fixed support arm 101 and two movable support arms 102. Both ends of the fixed support arm 101 are rotatably connected to the connecting shaft 103. Both connecting shafts 103 pass through the adjacent movable support arms 102 and are rotatably connected to the movable support arms 102. The other ends of the two movable support arms 102 are detachably connected by fastening bolts, which realizes the quick opening, closing and locking of the opening and closing bracket 1. It is convenient to quickly put on the outside of the cylindrical rod, while ensuring the stability of the ring-shaped structure after closing, preventing the opening and closing bracket 1 from loosening during operation, and improving the installation convenience and use safety of the device.

[0034] Climbing wheels 2 are arranged circumferentially within the opening and closing bracket 1. Several climbing wheels 2 are used to contact the outer wall of the cylindrical member and roll along the axis of the cylindrical member. The opening and closing bracket 1 is wrapped around the outside of the cylindrical member by the climbing wheels 2. It should be noted that there are three climbing wheels 2. The driving method of the climbing wheels 2 is as follows: each climbing wheel 2 is equipped with a corresponding miniature DC geared motor. The body of the miniature DC geared motor is fixedly installed on the wheel shell 6 corresponding to the climbing wheel 2. The output shaft of the miniature DC geared motor is coaxially and fixedly connected to the inner shaft of the climbing wheel 2. A remote control receiver module and a rechargeable lithium battery can also be provided. The lithium battery serves as the source of power for the miniature DC geared motor and the remote control receiver module. The system is powered by a block, and the remote control receiver module is electrically connected to the micro DC geared motor. The remote control receiver module sends control signals to control the start, stop, forward and reverse rotation of the micro DC geared motor, thereby driving the climbing wheel 2 to rotate forward or backward, so as to move the whole along the cylindrical rod. The climbing wheel 2 includes a fixed wheel body 201 and an annular pad 202. The wheel body 201 is rotatably connected to the wheel shell 6. The annular pad 202 is located on the outermost ring of the wheel body 201, and the annular pad 202 can produce elastic deformation when it is pressed against the outer wall of the cylindrical rod, which can increase the contact area between the two. The outer ring of the annular pad 202 is treated with anti-slip treatment to increase friction.

[0035] The spraying assembly 3, fixed relative to the opening and closing bracket 1, is used to spray paint onto the surface of cylindrical rods. The spraying assembly 3 includes a storage tank 301, a miniature airless pump 302, pipelines, and nozzles 303. The storage tank 301 is connected to the input end of the miniature airless pump 302 through the pipeline, and the output end of the miniature airless pump 302 is connected to the nozzles 303 through the pipeline. Both the storage tank 301 and the miniature airless pump 302 are fixedly connected to the fixed support arm 101 of the opening and closing bracket 1. Through the sequential connection of the storage tank 301, the miniature airless pump 302, the pipeline, and the nozzles 303, the pressurized delivery and atomized spraying of the paint are realized. The miniature airless pump 302 does not require external compressed air, has a compact structure, and can be directly integrated into the opening and closing bracket 1. At the same time, fixing the storage tank 301 and the miniature airless pump 302 to the fixed support arm 101 ensures the stability of the spraying assembly 3, making the paint delivery more stable and the spraying effect more uniform.

[0036] When the climbing wheel 2 tilts relative to the axis of the cylindrical member, it forms a spiral motion trajectory along the outer wall of the cylindrical member. Sleeves 4 are fixedly connected inside the fixed support arm 101 and the two movable support arms 102. An adjusting rod 5 for rotation is installed inside the sleeve 4. One end of the adjusting rod 5 is fixedly connected to a wheel housing 6. The climbing wheel 2 is rotatably installed in the wheel housing 6, and the climbing wheel 2 and wheel housing 6 are detachable. Different diameter climbing wheels 2 can be replaced according to the diameter of various cylindrical members to ensure that the climbing wheel 2 can make contact with the cylindrical member. Two symmetrical limiting grooves 7 are opened inside each sleeve 4, and sliding connections are made within the limiting grooves 7. The limiting post 8, fixed to the adjusting rod 5, moves a certain distance during rotation due to the cooperation of the limiting groove 7 and the limiting post 8. This causes the wheel housing 6 to drive the climbing wheel 2 to move radially along the cylindrical rod, allowing the annular pad 202 of the climbing wheel 2 to generate greater elastic deformation during the compression process with the cylindrical rod, further increasing the contact area. This helps the climbing wheel 2 to roll along the cylindrical rod in a spiral trajectory without slipping during rotation. One end of each sleeve 4 is rotatably connected to a limiting cylinder 9. The adjusting rod 5 is slidably connected to the limiting cylinder 9. One end of the adjusting rod 5 is provided with a groove. The interior of the limiting cylinder 9 has a long strip-shaped protrusion structure. The protruding part of the positioning cylinder 9 is slidably connected to the slot. One end of each of the three positioning cylinders 9 is fixedly connected to a bevel gear 10. One side of the opening and closing bracket 1 is provided with an arc-shaped plate 11 for rotation. An arc-shaped bevel rack 12 is fixedly connected to the outer side of the arc-shaped plate 11. The three arc-shaped bevel racks 12 are respectively meshed with the three bevel gears 10. When the arc-shaped plate 11 rotates, it drives the three arc-shaped bevel racks 12 to rotate around the center of the arc-shaped plate 11, and then drives the three bevel gears 10 to rotate, ensuring that the three climbing wheels 2 have the same tilt angle, avoiding uneven force, and improving the stability of operation. The inside of the arc-shaped plate 11 is provided with two arc-shaped grooves 13, and the two connecting shafts 103 are respectively connected to the two arc-shaped grooves 13. The slidable groove 13 is connected to the two connecting shafts 103. One end of each shaft is fixedly connected to a baffle 14 for resisting the arc plate 11. The two baffles 14, together with three bevel gears 10 and arc bevel rack 12, can prevent the arc plate 11 from shifting. The outer side of the arc plate 11 is provided with several equally spaced tooth grooves 15. A micro drive motor is fixedly connected to the opening and closing bracket 1. The output shaft of the micro drive motor is fixedly connected to a drive gear 16 that meshes with the tooth grooves 15. Through the meshing transmission of the micro drive motor, the drive gear 16 and the tooth grooves 15 on the outer side of the arc plate 11, the arc plate 11 can be automatically rotated, thereby automatically adjusting the tilt angle of the three climbing wheels 2.

[0037] A fixed block is fixedly connected to the fixed support arm 101 of the opening and closing bracket 1. A positioning rod 17 slides inside the fixed block. A spring 18 is fixedly connected between the head of the positioning rod 17 and the fixed block. The spring 18 is in a stretched state. Two positioning holes 19 are opened on one side of the arc plate 11. When the positioning hole 19 is rotated with the arc plate 11 to the positioning hole 19, the positioning rod 17 is inserted into the positioning hole 19 through the spring 18. Because the climbing wheel 2 has a large resistance with the cylindrical rod during the movement along the spiral trajectory, it is easy to deviate. Therefore, through The positioning rod 17 prevents the arc plate 11 from shifting, thereby fixing the tilt angle of the climbing wheel 2 and improving the stability of the climbing wheel 2. A brush 20 is fixedly installed on the opening and closing bracket 1. The brush head of the brush 20 is used to contact the cylindrical rod. When the brush 20 moves along the spiral trajectory of the cylindrical rod with the climbing wheel 2, it can clean the dust and impurities on the surface of the cylindrical rod before spraying, improve the cleanliness of the spraying area, and avoid dust affecting the adhesion of the paint and the spraying effect. Then, the nozzle of the spraying component 3 sprays the paint onto the area that the brush 20 has cleaned.

[0038] The cylindrical rod is installed in a ring-shaped manner by an openable and closable bracket 1 and a circularly distributed climbing wheel 2. The climbing wheel 2 contacts the outer wall of the rod to provide support and movement. The spraying component 3 is fixed to the bracket to complete the touch-up painting operation. When the climbing wheel 2 rotates slightly with the wheel shell 6, it can form a spiral motion trajectory when it is tilted relative to the axis of the rod. The nozzle 303 completes the full spraying simultaneously during the spiral movement, which solves the problems of low efficiency and high safety risk of traditional manual touch-up painting and realizes the automated operation of touch-up painting of cylindrical rods.

[0039] In use, the first step is to install the opening and closing bracket 1. Since road and bridge structures have many cylindrical members, and most are installed at height, the opening and closing bracket 1 is needed for quick installation while ensuring structural stability and preventing it from loosening during high-altitude operations. The operator first loosens the fastening bolts at the ends of the two movable support arms 102. Because the fixed support arm 101 and the movable support arm 102 are rotatably connected via a connecting shaft 103, the two movable support arms 102 can be rotated outwards around the connecting shaft 103, opening and closing bracket 1 into the open state. At this point, the device can be quickly... The bracket is fitted onto the outside of the cylindrical member to be painted. After fitting, the two movable arms 102 are flipped inward to make the opening and closing bracket 1 fit the outline of the cylindrical member. Then, the fastening bolts are tightened to achieve the detachable locking of the other end of the two movable arms 102, thereby forming a closed ring structure of the opening and closing bracket 1. At this time, the three climbing wheels 2 are pressed against the cylindrical member. Through the hinge structure of the fixed support arm 101 and the movable support arm 102, combined with the locking effect of the fastening bolts, the opening and closing of the opening and closing bracket 1 is realized, which facilitates the quick fitting and disassembly of the device and improves the ease of installation.

[0040] Next, after installation, as follows Figure 2 and Figure 3 As shown, the climbing wheels 2 do not need to be tilted. The three climbing wheels 2 are controlled by three miniature DC geared motors to rotate. The climbing wheels 2 drive the entire structure to climb from one end to the other along the axis of the cylindrical member (e.g., from the lowest point to the highest point). It should be noted that this method is applicable to both vertical and inclined cylindrical members.

[0041] Next, the climbing wheel 2 drives the entire assembly to climb from one end to the other along the axis of the cylindrical member. Then, the micro drive motor fixed to the opening / closing bracket 1 is activated. The output shaft of the micro drive motor drives the drive gear 16 to rotate. Since the drive gear 16 meshes with the equidistant toothed grooves 15 on the outer side of the arc-shaped plate 11, the rotation of the drive gear 16 drives the arc-shaped plate 11 to rotate around its own center. Arc-shaped bevel racks 12 are fixed to the outer side of the arc-shaped plate 11. The three arc-shaped bevel racks 12 respectively engage with the bevel gears 1 at one end of the three limiting cylinders 9. The 0-meshing connection means that when the arc plate 11 rotates, it will synchronously drive the three bevel gears 10 to rotate, which in turn will drive the limiting cylinder 9, which is fixedly connected to the bevel gears 10, to rotate. The elongated protrusion inside the limiting cylinder 9 is slidably connected to the slot at one end of the adjusting rod 5, and the adjusting rod 5 is slidably engaged with the limiting cylinder 9. Therefore, when the limiting cylinder 9 rotates, it will drive the adjusting rod 5 to rotate synchronously. At the same time, the limiting post 8 fixed on the adjusting rod 5 is slidably connected to the symmetrical limiting groove 7 inside the sleeve 4. The cooperation between the limiting groove 7 and the limiting post 8 When the adjusting rod 5 rotates, it moves a small distance radially along the cylindrical rod, thereby driving the wheel housing 6 and climbing wheel 2, which are fixedly connected to the adjusting rod 5, to move radially synchronously. This ultimately achieves synchronous tilt adjustment of the three climbing wheels 2 relative to the axis of the cylindrical rod. It should be noted that the three climbing wheels 2 must maintain a consistent tilt angle to ensure uniform force distribution during device movement and avoid deviation. The micro-drive motor drives the arc plate 11 to rotate, achieving automatic adjustment of the tilt angle of the climbing wheels 2. When the adjusting rod 5 moves radially, it drives the climbing wheels 2 to move closer to the cylindrical rod until the outermost annular pad 202 of the climbing wheel 2 presses against the outer wall of the cylindrical rod. Since the annular pad 202 is made of elastic material, it will undergo elastic deformation during compression. At the same time, the cooperation of the limiting groove 7 and the limiting post 8 will continuously apply a certain amount of compressive force to the climbing wheel 2, causing the annular pad 202 to undergo greater elastic deformation, thereby increasing the contact area between the climbing wheel 2 and the cylindrical rod. Furthermore, the outer ring of the annular pad 202 is treated with anti-slip material, which can further improve the friction between the two.

[0042] After the tilt angle of the climbing wheel 2 is adjusted, the arc plate 11 needs to be positioned and locked. When the climbing wheel 2 moves spirally along the cylindrical rod, the resistance between it and the cylindrical rod is relatively large, which can easily cause the arc plate 11 to shift, thereby changing the tilt angle of the climbing wheel 2 and affecting the spiral movement trajectory and spraying effect. Therefore, the arc plate 11 is provided with two arc grooves 13 inside, and two connecting shafts 103 are slidably connected to the two arc grooves 13 respectively. The baffle 14 fixed at one end of the connecting shaft 103 abuts against the arc plate 11, which can provide lateral limit for the arc plate 11. The function is to cooperate with the meshing constraint of the bevel gear 10 and the arc-shaped bevel rack 12 to initially prevent the arc plate 11 from shifting; at the same time, a positioning rod 17 is slidably connected in the fixing block on the fixed support arm 101 of the opening and closing bracket 1. The spring 18 fixedly connected between the head of the positioning rod 17 and the fixing block is in a stretched state. When the arc plate 11 rotates to the preset tilt angle, the positioning hole 19 on one side of the arc plate 11 will be aligned with the positioning rod 17. At this time, the tension of the spring 18 will drive the positioning rod 17 to insert into the positioning hole 19, thereby realizing the positioning and locking of the arc plate 11.

[0043] After the climbing wheel 2 is adjusted and positioned, it needs to be controlled to rotate in the opposite direction. The rotation of the climbing wheel 2 drives the device to move along the cylindrical rod. At the same time, the tilt angle of the climbing wheel 2 is used to achieve spiral movement, so that the spraying component 3 can fully cover the surface of the cylindrical rod and achieve full paint touch-up. Since the climbing wheel 2 is tilted relative to the axis of the cylindrical rod, when the climbing wheel 2 rotates, its motion trajectory will be decomposed into linear motion along the axis of the cylindrical rod and rotational motion along the circumference of the rod. After the two are combined, they drive the entire device to form a spiral motion trajectory along the outer wall of the cylindrical rod.

[0044] Since cylindrical rods are exposed to the outdoors for a long time, dust and impurities will adhere to their surfaces. If they are sprayed directly, it will affect the adhesion of the paint and the quality of the spraying. Therefore, it is necessary to clean them first and then spray them to achieve integrated operation and improve the efficiency and quality of paint touch-up. The brush 20 fixedly installed on the set opening and closing bracket 1 moves spirally along the cylindrical rod in sync with the device. The brush head of the brush 20 contacts the outer wall of the cylindrical rod. The brush head can be distributed with bristles and elastically contact the outer wall of the rod. During the movement, the bristles can clean the dust, rust and impurities on the surface of the rod in all directions, providing a clean base surface for subsequent spraying. The spraying assembly 3 starts synchronously. The paint in the storage tank 301 is transported to the input end of the micro airless pump 302 through the pipeline. The micro airless pump 302 pressurizes the paint and then transports it to the nozzle 303 through the pipeline. The nozzle 303 atomizes the paint and sprays it onto the surface of the cylindrical rod. The area sprayed by the nozzle 303 is the clean area that has been cleaned by the brush 20, ensuring the quality of the spraying. Since the storage tank 301 and the micro airless pump 302 are both fixed on the fixed support arm 101 of the opening and closing bracket 1, they move synchronously with the device, which can realize continuous and uniform spraying on the surface of the cylindrical rod.

[0045] It should be noted that the rechargeable lithium battery equipped with the device powers three miniature DC geared motors, a miniature airless pump 302, a miniature drive motor, and a remote control receiver module. The operator can send control signals through an external remote control. After receiving the signals, the remote control receiver module controls the start, stop, forward and reverse rotation of the miniature DC geared motor corresponding to each climbing wheel 2, as well as independently controls the operation of the miniature airless pump 302 and the miniature drive motor. Since the body of the miniature DC geared motor is fixed on the wheel housing 6, and the output shaft is coaxially and fixedly connected to the inner shaft of the climbing wheel 2, the motor will directly drive the climbing wheel 2 to rotate in the forward or reverse direction when it rotates.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ring-shaped cylindrical member paint repair spraying device for roads and bridges, characterized in that, include: The opening and closing bracket (1) has a ring-shaped structure and can be opened and closed; Climbing wheels (2) are distributed in a circle in the opening and closing bracket (1). Several climbing wheels (2) are used to contact the outer wall of the cylindrical rod and roll along the axis of the cylindrical rod. The opening and closing bracket (1) is surrounded by the outer side of the cylindrical rod through the climbing wheels (2). The spraying assembly (3) is fixed relative to the opening and closing bracket (1) and is used to spray paint onto the surface of the cylindrical rod. When the climbing wheel (2) is tilted relative to the axis of the cylindrical member, the climbing wheel (2) forms a spiral motion trajectory along the outer wall of the cylindrical member.

2. The ring-shaped cylindrical member paint spraying device for road and bridge use according to claim 1, characterized in that: The opening and closing bracket (1) includes a fixed support arm (101) and two movable support arms (102). Both ends of the fixed support arm (101) are rotatably connected to a connecting shaft (103). Both connecting shafts (103) pass through the movable support arms (102) that are close to them and are rotatably connected to the movable support arms (102). The other ends of the two movable support arms (102) are detachably connected by fastening bolts.

3. The ring-shaped cylindrical member paint spraying device for road and bridge use according to claim 1, characterized in that: The spraying assembly (3) includes a storage tank (301), a micro airless pump (302), pipelines and nozzles (303). The storage tank (301) is connected to the input end of the micro airless pump (302) through the pipeline, and the output end of the micro airless pump (302) is connected to the nozzles (303) through the pipeline.

4. A ring-shaped cylindrical member paint spraying device for road and bridge construction according to claim 2, characterized in that: The fixed support arm (101) and the two movable support arms (102) are all fixedly connected with sleeves (4). The sleeves (4) are equipped with adjusting rods (5) for rotation. One end of the adjusting rod (5) is fixedly connected to a wheel housing (6). The climbing wheel (2) is rotatably installed in the wheel housing (6). Each sleeve (4) has two symmetrical limiting grooves (7) inside. The limiting grooves (7) are slidably connected with limiting posts (8) that are fixed to the adjusting rods (5).

5. A ring-shaped cylindrical member paint spraying device for road and bridge use according to claim 1, characterized in that: The climbing wheel (2) includes a fixed wheel body (201) and an annular pad (202). The wheel body (201) is rotatably connected to the wheel shell (6). The annular pad (202) is located on the outermost ring of the wheel body (201), and the annular pad (202) can produce elastic deformation when it is pressed against the outer wall of the cylindrical rod.

6. A ring-shaped cylindrical member paint spraying device for road and bridge construction according to claim 4, characterized in that: One end of each sleeve (4) is rotatably connected to a limiting cylinder (9). The adjusting rod (5) is slidably connected to the limiting cylinder (9). One end of the adjusting rod (5) is provided with a slot. The inside of the limiting cylinder (9) has a long strip-shaped protrusion structure. The protrusion of the limiting cylinder (9) is slidably connected to the slot. One end of each of the three limiting cylinders (9) is fixedly connected to a bevel gear (10). One side of the opening and closing bracket (1) is provided with an arc plate (11) for rotation. An arc bevel rack (12) is fixedly connected to the outside of the arc plate (11). The three arc bevel racks (12) are respectively meshed with the three bevel gears (10).

7. A ring-shaped cylindrical member paint spraying device for road and bridge construction according to claim 6, characterized in that: The arc plate (11) has two arc grooves (13) inside. Two connecting shafts (103) are slidably connected to the two arc grooves (13) respectively. One end of each connecting shaft (103) is fixedly connected to a baffle (14) for resisting the arc plate (11).

8. A ring-shaped cylindrical member paint spraying device for road and bridge construction according to claim 7, characterized in that: The outer side of the arc plate (11) is provided with several equally spaced toothed grooves (15), and a micro drive motor is fixedly connected to the opening and closing bracket (1). The output shaft of the micro drive motor is fixedly connected to a drive gear (16) that meshes with the toothed grooves (15).

9. A ring-shaped cylindrical member paint spraying device for road and bridge construction according to claim 7, characterized in that: A fixed block is fixedly connected to the opening and closing bracket (1), and a positioning rod (17) slides inside the fixed block. A spring (18) is fixedly connected between the head of the positioning rod (17) and the fixed block. Two positioning holes (19) are opened on one side of the arc plate (11). When the positioning hole (19) rotates with the arc plate (11) to the positioning hole (19), the positioning rod (17) is inserted into the positioning hole (19) through the spring (18).

10. A ring-shaped cylindrical member paint repair spraying device for roads and bridges according to claim 1, characterized in that: A brush (20) is fixedly installed on the opening and closing bracket (1), and the brush head of the brush (20) is used to contact the cylindrical rod.

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