An automatic spraying system for bridge and culvert maintenance

Abstract

This invention discloses an automated spraying system for the maintenance of bridge and culvert structures, belonging to the field of bridge and culvert maintenance technology. It includes a drive rod with an end seat connected to one end. A supporting outer ring is provided outside the end seat. It also includes a first support mechanism, with multiple first support mechanisms arranged around the outside of the supporting outer ring. A first spraying maintenance mechanism is connected to the side of each first support mechanism away from the supporting outer ring. In this invention, the problem of water dripping from the top is completely solved through adhesive immersion maintenance. The first support mechanism expands radially, driving the first spraying maintenance mechanism to fully adhere to and press firmly against the inner side of the component to be maintained. The maintenance liquid is directly injected into the first adhesive part for contact immersion, effectively avoiding the problem of rapid water dripping from the top in traditional spraying. This greatly improves the moisturizing and maintenance effect on the top and side walls of the component's inner cavity, while also preventing excessive water deposition at the bottom.

Description

Technical Field

[0001] This invention belongs to the field of bridge and culvert maintenance technology, and particularly relates to an automated spraying system for the maintenance of bridge and culvert structures. Background Technology

[0002] After concrete pouring and formwork removal, bridge and culvert structures such as box girders, hollow piers, and pipe culverts must undergo strict moisture retention curing to ensure the concrete fully hydrates, prevent surface shrinkage and cracking, and thus ensure the overall strength and durability of the structure. Currently, for the curing of the inner cavity of bridge and culvert structures, traditional methods often involve manually pulling water pipes to spray water or installing simple fixed sprinkler pipes inside the cavity.

[0003] However, existing technologies have the following obvious drawbacks in practical applications: for the top and high sidewalls of the component's inner cavity, the curing liquid after spraying is easily dripped quickly due to gravity, resulting in a short water retention time and insufficient wetting of the top and sidewalls. Excess water will also accumulate in large quantities at the bottom of the component, which not only wastes water resources but may also have adverse effects on the bottom structure if soaked for a long time. Conventional scattering spraying is difficult to uniformly cover the angles or abrupt shape changes in the inner cavity of bridges and culverts, which can easily create curing dead zones, leaving room for improvement. Summary of the Invention

[0004] The purpose of this invention is to provide an automated spraying system for the maintenance of bridge and culvert structures, in order to solve the problem that the curing solution after spraying is prone to rapid dripping due to gravity, resulting in a short water retention time and insufficient wetting of the top and side walls.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automated spraying system for the maintenance of bridge and culvert structures includes a drive rod, one end of which is connected to an end seat, and the end seat is provided with a supporting outer ring. It also includes: The first support mechanism, a plurality of first support mechanisms are arranged around the outside of the support outer ring. The side of the first support mechanism away from the support outer ring is connected to the first spray curing mechanism. Spray curing is performed by the first spray curing mechanism moving radially along the support outer ring and contacting the inner side of the component to be cured. The second support mechanism consists of multiple second support mechanisms arranged around the outside of the outer support ring, with each second support mechanism located between adjacent first support mechanisms. A second spray curing mechanism is connected to the side of the second support mechanism away from the outer support ring. The second spray curing mechanism is located between adjacent first spray curing mechanisms. The second spray curing mechanism moves radially along the outer support ring to contact the inner angle position of the component to be cured for spraying.

[0006] As a further description of the above technical solution: The first spray maintenance mechanism includes: A rotating sleeve is provided with ball bearings on both sides, and a ball sleeve is rotatably connected inside the ball bearings. One end of the ball sleeve is connected to an extension tube, and the ends of the two extension tubes that are far apart are connected to the second spray curing mechanism. The rotating sleeve has a liquid inlet, which extends into the drive rod through a pipe. The first application part has a support plate at its top. Both sides of the top of the support plate are fixed to the outside of the extension tube by fixing collars. The first application part is connected to the bottom of the extension tube through a liquid guide tube.

[0007] As a further description of the above technical solution: The first spray maintenance mechanism also includes: Two telescopic rods are located on both sides of the first application part. A first spring is sleeved on the outside of each telescopic rod. A first rotating block and a second rotating block are respectively connected to the two ends of the telescopic rod and the first spring. The first rotating block is rotatably connected to one side of the fixed collar, and a connecting block is rotatably connected to one side of the second rotating block. The connecting block is connected to the top of the support plate. The telescopic rods extend and retract to make the support plate drive the first application part to rotate and apply.

[0008] As a further description of the above technical solution: The first spray maintenance mechanism also includes: The first application part is positioned on both sides of the limiting plate. Guide rods are connected to both ends of one side of the limiting plate. The guide rods are slidably connected to the guide holes at the top of the first application part. A plate body is connected between the other ends of the two guide rods. A screw seat is embedded on one side of the plate body. An adjusting screw is threaded into the screw seat. The other end of the adjusting screw extends through the hole reserved in the first application part to one side of the limiting plate. One end of the adjusting screw is rotatably connected to one side of the limiting plate through a rotating shaft and bearing.

[0009] As a further description of the above technical solution: The first spray maintenance mechanism also includes: Two adhesive strips are connected to both sides of the first adhesive part. The first adhesive part is connected to the liquid outlet hole at the bottom of the support plate. The first adhesive part is an absorbent sponge. An overflow tank, with multiple overflow tanks arrayed on one side of the first application part, allows the curing solution to fully wet the surface of the first application part through the overflow tanks; The roller is connected to one side of the rotating sleeve and contacts the inner side of the component to be cured.

[0010] As a further description of the above technical solution: The second spray maintenance mechanism includes: The second application part has an arc-shaped cross-section. A rotating rod is connected to one side of the second application part, and a rotating liquid seat is rotatably connected to the other end of the rotating rod. The two rotating liquid seats are rotatably connected to each other. An eccentric connecting pipe is connected to the outside of the rotating liquid seat. The other end of the eccentric connecting pipe is connected to one end of the extension pipe. The arc-shaped second application part is attached to the inner side of the component to be cured by moving radially with the second support mechanism.

[0011] As a further description of the above technical solution: The first support mechanism includes: The first support rod is radially slidably connected to the hole opened on the outer periphery of the support outer ring. One end of the first support rod is connected to a first extrusion plate. After the first extrusion plate moves, it contacts the second spray curing mechanism at the corresponding position on the outside, so that the second spray curing mechanism fully fits the included angle of the component to be cured. The first force-bearing block is connected to the end of the first support rod away from the first extrusion plate; The compression wedges are surrounded by a drive ring. A first rotary drive unit is connected to one side of the drive ring. The first rotary drive unit is connected to the outside of the drive rod. The first rotary drive unit drives the drive ring to rotate, thereby causing the compression wedges to compress the corresponding first force block.

[0012] As a further description of the above technical solution: The second support mechanism includes: The second support rod is radially slidably connected to the hole opened on the outer periphery of the outer ring of the support, and one end of the second support rod is connected to the second extrusion plate; The second force-bearing block is connected to the end of the second support rod away from the second extrusion plate; The extrusion ring is rotatably connected to the outside of the drive rod. The extrusion ring includes multiple protrusions corresponding to the second force block. A second rotation drive is provided on one side of the extrusion ring. The corresponding second force block is extruded by rotating the protrusions of the second rotation drive.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, the problem of water dripping from the top is completely solved by applying and immersing the curing agent. The first support mechanism expands radially, driving the first spray curing mechanism to fully adhere to and press against the inner side of the component to be cured. The curing liquid is directly injected into the interior of the first application part for contact immersion, which effectively avoids the problem of rapid water dripping from the top in traditional spraying, greatly improves the moisturizing and curing effect on the top side and sidewall of the component's inner cavity, and at the same time avoids excessive water deposition at the bottom.

[0014] 2. In this invention, a specially designed second support mechanism and a second spraying maintenance mechanism are used to perform radial contact spraying at the angle position between adjacent first mechanisms using an arc-shaped second application part. Through the cooperation of the eccentric connecting pipe and the rotating liquid seat, the second application part can adaptively adjust the angle to completely eliminate the maintenance blind spot at the angle position of the bridge culvert cavity.

[0015] 3. In this invention, by introducing a combination of ball bearing, telescopic rod and first spring in the first spray curing mechanism, when the applicator contacts the uneven inner wall of the component, the spring and telescopic rod can absorb the deflection angle and offset stress with elastic force to maintain a constant applicator pressure. In conjunction with the rotating sleeve, roller and applicator strip, the frictional resistance during applicator movement is greatly reduced, and the service life of the sponge applicator is extended.

[0016] 4. In this invention, the extrusion control assembly consisting of an adjustable lead screw, a lead screw seat, and a limiting plate can precisely control the amount of water immersion by rotating the adjustable lead screw to control the extrusion intensity of the limiting plate on the first application part according to the water demand of bridge and culvert components under different materials and temperature and humidity environments. In conjunction with the array of overflow troughs, the curing liquid can be fully overflowed even when a large amount of water is required. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure proposed in this invention; Figure 2 This is a schematic diagram of a partial assembly structure proposed in this invention; Figure 3 The present invention proposes Figure 2 Enlarged structural diagram of section A; Figure 4 The present invention proposes Figure 2 Enlarged structural diagram of section B; Figure 5 This is a schematic diagram of a portion of the lateral structure proposed in this invention; Figure 6 This is a schematic diagram of the transverse structure of the first spray curing mechanism proposed in this invention; Figure 7 The present invention proposes Figure 6 Enlarged structural diagram of section C; Figure 8 This is a schematic diagram of the side structure of the first spray curing mechanism proposed in this invention; Figure 9 This is a schematic diagram of the series assembly structure proposed in this invention.

[0018] Legend: 1. Drive rod; 2. Support outer ring; 3. Second support mechanism; 301. Second support rod; 302. Second extrusion plate; 303. Second force-bearing block; 304. Extrusion ring; 305. Second rotary drive unit; 4. First support mechanism; 401. First support rod; 402. First extrusion plate; 403. First force-bearing block; 404. Extrusion wedge; 405. First rotary drive unit; 5. First spray curing mechanism; 501. Rotary sleeve; 502. Roller; 503. Extension tube; 504. 505. First application section; 506. Overflow tank; 507. Adhesive strip; 508. Limiting plate; 509. Guide rod; 510. Adjusting screw; 511. Fixing collar; 512. First rotating block; 513. Telescopic rod; 514. First spring; 515. Second rotating block; 516. Connecting block; 517. Support plate; 518. Liquid guide tube; 6. Second spray curing mechanism; 601. Second application section; 602. Rotating rod; 603. Rotating liquid seat; 604. Eccentric connecting pipe; 7. End seat. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-9 The present invention provides a technical solution: an automated spraying system for the maintenance of bridge and culvert structures, including a drive rod 1, one end of which is connected to an end seat 7, and the end seat 7 is provided with a supporting outer ring 2, and further including: First support mechanism 4, multiple first support mechanisms 4 are arranged around the outside of the support outer ring 2. The side of the first support mechanism 4 away from the support outer ring 2 is connected to the first spray curing mechanism 5. Spray curing is carried out by the first spray curing mechanism 5 moving radially along the support outer ring 2 and contacting the inner side of the component to be cured. Second support mechanism 3, multiple second support mechanisms 3 are arranged around the outside of the support outer ring 2, and the second support mechanism 3 is located between adjacent first support mechanisms 4. The side of the second support mechanism 3 away from the support outer ring 2 is connected to a second spray curing mechanism 6. The second spray curing mechanism 6 is located between adjacent first spray curing mechanisms 5. The second spray curing mechanism 6 moves radially along the support outer ring 2 to contact the inner angle position of the component to be cured for spraying. Specifically: Through the designed first support mechanism 4 and second support mechanism 3, the corresponding first spray curing mechanism 5 and second spray curing mechanism 6 can be moved outward by the radially expandable first support mechanism 4 and second support mechanism 3. The first spray curing mechanism 5 and second spray curing mechanism 6 can fully fit the inner side of the component to be cured, which is conducive to improving the curing effect through contact spraying and avoids excessive water deposition affecting the curing effect. Furthermore, the contact spraying curing by the expanded second spray curing mechanism 6 and the inner side of the component at an angle improves the curing effect of dead corners.

[0021] Please see Figures 6-8 The first spray maintenance unit 5 includes: Rotary sleeve 501, ball bearings on both sides of the rotary sleeve 501, ball sleeves rotatably connected inside the ball bearings, extension tubes 503 connected to one end of the ball sleeves, and the ends of the two extension tubes 503 that are far apart are connected to the second spray curing mechanism 6. Rotary sleeve 501 has a liquid inlet, which extends into the drive rod 1 through a pipe. The first application part 504 has a support plate 516 at the top. Both sides of the top of the support plate 516 are provided outside the extension tube 503 through fixing collars 510. The first application part 504 is connected to the bottom of the extension tube 503 through a liquid guide tube 517. Specifically: Through the designed first support mechanism 4 and the designed rotating sleeve 501, the ball sleeve can be driven to rotate within the rotating sleeve 501 through the ball bearing via the two side extension tubes 503. This facilitates the partial movement of the two side extension tubes 503 so that the first application part 504 can fully adhere to the inner side of the component. At this time, the water supplied by the external liquid supply pipe into the rotating sleeve 501 can be transported to the support plate 516 and the first application part 504 through the liquid guide pipe 517, so that the first application part 504 can fully absorb the liquid and wet the component. Furthermore, by wetting and adhering to the inner side of the component, the wetting and curing effect on the top side of the inner cavity of the component can be improved, and water dripping can be avoided from affecting the curing effect.

[0022] The first spray maintenance unit 5 also includes: Two telescopic rods 512 are located on both sides of the first application part 504. A first spring 513 is sleeved on the outside of the telescopic rods 512. A first rotating block 511 and a second rotating block 514 are respectively connected to the two ends of the telescopic rods 512 and the first spring 513. The first rotating block 511 is rotatably connected to one side of the fixed collar 510. A connecting block 515 is rotatably connected to one side of the second rotating block 514. The connecting block 515 is connected to the top of the support plate 516. The telescopic rods 512 extend and retract to make the support plate 516 drive the first application part 504 to rotate and apply the product. Specifically: Through the designed telescopic rod 512 and the first spring 513, the shortening of the telescopic rod 512 can pull the external first spring 513. The first spring 513 can absorb the deflection angle of the bottom support plate 516 with its own elasticity, thereby maintaining the application effect of the bottom first application part 504. Furthermore, the telescopic rod 512 absorbs the offset stress through the rotation of the second rotating blocks 514 on both sides at the connecting block 515, thereby improving the application effect.

[0023] The first spray maintenance unit 5 also includes: The two limiting plates 507 correspond to the two sides of the first application part 504. Each end of one side of the limiting plate 507 is connected to a guide rod 508. The guide rod 508 is slidably connected in the guide hole at the top of the first application part 504. The other ends of the two guide rods 508 are connected to a plate body. A screw seat is embedded in one side of the plate body. An adjusting screw 509 is threaded into the screw seat. The other end of the adjusting screw 509 extends through the hole reserved in the first application part 504 to one side of the limiting plate 507. One end of the adjusting screw 509 is rotatably connected to one side of the limiting plate 507 through a rotating shaft and bearing. Specifically: When it is necessary to control the amount of saturated liquid overflow in the first application part 504, the limiting plate 507 can be moved by adjusting the rotation of the lead screw 509. The movement of the limiting plate 507 can adjust the squeezing intensity on the first application part 504, which is beneficial to control the amount of saturated water by squeezing the first application part 504 and improve the control of the spray volume for curing components of different materials.

[0024] The first spray maintenance unit 5 also includes: Adhesive strip 506, two adhesive strips 506 are respectively connected to both sides of the first adhesive part 504, the first adhesive part 504 is connected to the liquid outlet hole at the bottom of the support plate 516, wherein the first adhesive part 504 is an absorbent sponge. An overflow tank 505, an array of multiple overflow tanks 505 are provided on one side of the first application part 504, and the maintenance liquid is fully soaked into the surface of the first application part 504 through the overflow tanks 505. Roller 502 is connected to one side of rotating sleeve 501 and contacts the inner side of the component to be cured through roller 502; Specifically: By designing the bonding strip 506, the contact friction between the bonding strips 506 on both sides of the first bonding part 504 and the inner side of the component can be reduced, thereby improving the bonding and wetting durability of the first bonding part 504. Furthermore, by designing the overflow groove 505, the liquid supply can be increased when spraying is required, so that the water can be sprayed through the overflow groove 505 for bonding and curing. Furthermore, the designed roller 502 can reduce friction when in contact with the inner side of the component.

[0025] The second spray curing unit 6 includes: The second application part 601 has an arc-shaped cross-section. A rotating rod 602 is connected to one side of the second application part 601. A rotating liquid seat 603 is rotatably connected to the other end of the rotating rod 602. The two rotating liquid seats 603 are rotatably connected to each other. An eccentric connecting pipe 604 is connected to the outside of the rotating liquid seat 603. The other end of the eccentric connecting pipe 604 is connected to one end of the extension pipe 503. Specifically: Through the designed eccentric connecting pipe 604 and rotating liquid seat 603, the relative angle of the two first spray curing mechanisms 5 can be adjusted and adapted by the mutual rotation of the two rotating liquid seats 603.

[0026] As the second support mechanism 3 moves radially, the arc-shaped second application part 601 can fully fit the inner side of the component to be cured. Specifically: Through the design of the second spray curing section, the second application section 601 can repeatedly contact the inner side of the component through the arc surface, thereby maintaining the contact spraying effect on the inner side of the component clamp. The second application section 601 can rotate outside the rotating liquid seat 603 through the rotating rod 602 to adapt to the contact angle on the inner side of the component, thereby improving the curing treatment effect. Furthermore, when adjusting the dimensions of the first spray curing mechanism 5 and the second spray curing mechanism 6 to adapt to the inner diameter of the component during curing, the extension tubes 503 that move on both sides can drive the rotating liquid seat 603 to rotate relative to each other through the eccentric connecting tube 604 to adapt to the adjustment angle, thereby improving the application and curing effect on components of different sizes. The eccentric connecting tube 604 is designed to maintain the connection requirements of the extension tubes 503. The material of the second application part 601 is the same as that of the first application part 504. The first application part 504 and its internal fluid distribution and wetting process, the pressure equalization and distribution within the support plate 516, and the externally pumped curing liquid, after passing through the drive rod 1, rotating sleeve 501, and extension tube 503, are precisely delivered into the internal cavity of the support plate 516 via the liquid guide tube 517. This cavity acts as a pressure equalization and distribution chamber in fluid dynamics. After the curing liquid fills the cavity and reaches pressure balance, it is evenly and synchronously discharged downwards through multiple outlet holes at the bottom of the support plate 516, completely avoiding local overload or uneven wetting caused by single-point liquid supply. The "slow seepage and fast overflow" dual-channel wetting, along with the through-type overflow trough 505, ensures that the curing liquid, after being discharged from the outlet holes, enters the... The first application section 504 is an absorbent sponge. At this time, the fluid conducts through two channels. In the slow-penetration channel, the curing liquid slowly soaks into the sponge through its rich three-dimensional capillary pores until the sponge reaches saturation. It uses its physical water-locking properties to provide long-lasting moisture retention to the inner wall of the component. In the fast-overflow channel, the overflow groove 505 adopts a through-type design, which forms a flow channel directly to the inner wall of the component inside the sponge. When the system is in a high-volume liquid supply mode, or when the limiting plate 507 is squeezed by rotating the adjusting screw 509, the excess curing liquid or the instantaneous high-volume liquid that is squeezed out can flow directly and quickly to the surface of the component along the through-type overflow groove 505, quickly forming a water film and realizing the instantaneous switching from micro-moisturization to high-volume rinsing spray.

[0027] The second application section 601 and the adaptive fluid conduction process in dead corners: flexible infusion and penetration into dead corners. For the second application section 601 located in the dead corner of the bridge culvert, the fluid conduction is cleverly achieved by using the eccentric connecting pipe 604. The eccentric connecting pipe 604 serves as a dedicated hose channel connecting the extension pipe 503 and the rotating liquid seat 603. It not only acts as a reliable fluid bridge, but its flexibility and eccentric design can perfectly absorb the displacement and angle difference caused by the first support mechanism 4 on both sides adapting to components of different sizes. Under pressure, the curing liquid flows smoothly into the rotating liquid seat 603 along the hose of the eccentric connecting pipe 604, and then seeps into the liquid-absorbing sponge of the arc-shaped second application section 601. Under the radial push of the second support mechanism 3, the water-saturated arc-shaped sponge tightly fills the corner of the component. Through contact micro-penetration, it breaks the limitation of conventional spraying being unable to cover dead corners, and achieves all-round curing without blind spots.

[0028] The first support structure 4 includes: The first support rod 401 is radially slidably connected to the hole opened on the outer periphery of the support outer ring 2. One end of the first support rod 401 is connected to the first extrusion plate 402. After the first extrusion plate 402 moves, it contacts the second spray curing mechanism 6 at the corresponding position on the outside, so that the second spray curing mechanism 6 fully fits the included angle of the component to be cured. The first force-bearing block 403 is connected to the end of the first support rod 401 that is away from the first extrusion plate 402; A compression wedge 404 is formed, and a drive ring is connected around the compression wedge 404. A first rotary drive unit 405 is connected to one side of the drive ring. The first rotary drive unit 405 is connected to the outside of the drive rod 1. The first rotary drive unit 405 drives the drive ring to rotate, thereby causing the compression wedge 404 to compress the corresponding first force block 403.

[0029] Specifically: Through the designed first support mechanism 4, the first rotary drive unit 405 can rotate to drive the drive ring to rotate. The rotation of the drive ring can drive the external extrusion wedge 404 to rotate. The rotation of the extrusion wedge 404 can drive the first force block 403 to move. When the first force block 403 moves radially outward, it can push the corresponding rotating sleeve 501 and extension tube 503. The rotating sleeve 501 drives the extension tube 503 to move, which can drive the first application part 504 to move. The movement of the first application part 504 can make full contact with the inner side of the component, which is beneficial to adapting to the maintenance contact effect of components of different sizes.

[0030] The circumferentially arranged compression wedges 404 enable the first application part 504 to be equidistantly expanded, which helps to improve the full support effect on the inner side of the component. In a preferred embodiment of the present invention, in order to achieve stable rotation of the drive ring, the first rotary drive unit 405 adopts a gear transmission structure. Specifically, the first rotary drive unit 405 includes a first motor fixed to the outer wall of the drive rod 1, and a drive gear is fixedly connected to the output shaft of the first motor. Correspondingly, the inner ring of the drive ring is coaxially fixed with a driven gear ring that meshes with the drive gear. During operation, the first motor drives the drive gear to rotate, and through the meshing transmission of the gear ring, it directly drives the drive ring and the pressing wedge 404 to rotate smoothly, thereby realizing the radial expansion of the support mechanism. This part is a mature technology in the relevant field and will not be described in detail.

[0031] The second support structure 3 includes: The second support rod 301 is radially slidably connected to the hole opened on the outer periphery of the support outer ring 2, and one end of the second support rod 301 is connected to the second extrusion plate 302. The second force-bearing block 303 is connected to the end of the second support rod 301 that is away from the second extrusion plate 302; The extrusion ring 304 is rotatably connected to the outside of the drive rod 1. The extrusion ring 304 includes a plurality of protrusions corresponding to the second force block 303. A second rotation drive part 305 is provided on one side of the extrusion ring 304. The corresponding second force block 303 is extruded by rotating the protrusions of the second rotation drive part 305. The second rotation drive part 305 is installed on the outside of the drive rod 1. Specifically: Through the designed second support mechanism 3, the second rotary drive unit 305 can drive the extrusion ring 304 to rotate. The rotation of the extrusion ring 304 can drive the external protrusion. The rotation of the protrusion can squeeze the corresponding second force block 303. The force on the second force block 303 can drive the second support rod 301 to move radially within the hole of the outer support ring 2. The movement of the second support rod 301 can drive the arc-shaped second applicator 601 at the included angle to move and fully fit the inner side of the component, which is beneficial to improving the wetting and spraying curing effect of the clamp on the inner side of the component.

[0032] In another preferred embodiment of the present invention, in order to have a self-locking and anti-retraction function during extrusion, the second rotary drive unit 305 adopts a worm gear transmission structure. Specifically, the second rotary drive unit 305 includes a second motor fixed to the outer wall of the drive rod 1, and a worm gear is coaxially fixed on the output shaft of the second motor. Correspondingly, a worm wheel ring that meshes with the worm gear is fixed to the end face or outer peripheral side of the extrusion ring (04). During operation, the second motor drives the worm gear to rotate, thereby driving the worm wheel ring and the extrusion ring 304 to rotate to extrude the second force block 303. With the help of the self-locking characteristics of the worm gear mechanism, the second application part 601 can be effectively prevented from loosening and retracting due to the extrusion reaction force, ensuring stable application spraying to dead corner positions. This part is a mature technology in related fields and will not be described in detail.

[0033] Working principle: During use, the radial expansion and adaptive fit are delivered into the inner cavity of the bridge and culvert component to be cured via the drive rod 1. By activating the first rotating drive unit 405, the drive ring and the extrusion wedge 404 are rotated. The rotation of the extrusion wedge 404 pushes the first force block 403 outward radially, and the first support rod 401 slides within the support outer ring 2, pushing the first extrusion plate 402 and the first spray curing mechanism 5 against the inner wall of the component. The roller 502 contacts the inner wall first to reduce resistance, and then the absorbent sponge of the first application part 504 fully adheres to the inner wall surface. During this process, the telescopic rod 512 and the first spring 513 adaptively absorb the uneven stress of the inner wall, and the ball sleeve finely adjusts the angle within the rotating sleeve 501 to ensure perfect fit of the application part. When the angled surfaces are aligned, the second rotary drive unit 305 is activated synchronously or sequentially, driving the extrusion ring 304 and its protrusion to rotate, pushing the second force block 303 and the second support rod 301 outward. The second extrusion plate 302 pushes the arc-shaped second applicator 601 into the angled position inside the component. The extension tube 503 drives the rotating liquid seat 603 to rotate relative to each other through the eccentric connecting tube 604, so that the arc-shaped second applicator 601 can perfectly adapt to the specific angle size of the angle.

[0034] After the system is fully deployed and bonded, the external liquid supply system pumps the curing liquid into the drive rod 1. The liquid enters the inlet of the rotating sleeve 501 through the pipe, and then splits into two paths: one path enters the support plate 516 through the liquid guide pipe 517 and directly wets the absorbent sponge of the first bonding part 504; the other path enters the second bonding part 601 through the extension pipes 503 on both sides and the eccentric connecting pipe 604.

[0035] After the first application part 504 and the second application part 601 are filled with the curing liquid, they are immersed in the bridge culvert inner wall and the corner. If a large amount of water is needed instantly, the liquid can flow out through the overflow groove 505 on the surface of the first application part 504.

[0036] In terms of water output control and mobile operation, when it is necessary to adjust the immersion amount of a specific component, the operator or the automated mechanism can rotate the adjusting screw 509. The adjusting screw 509 drives the limiting plate 507 to approach and apply mechanical compression to the first application part 504 of the sponge material. The greater the compression force, the smaller the pores of the sponge and the change in water retention, thereby controlling the overflow rate of the internal curing liquid.

[0037] As the system moves along the bridge culvert axis under the traction of the drive rod 1, the bonding strip 506 and the roller 502 effectively reduce sliding friction, and the system continuously performs efficient automatic bonding spraying maintenance on the inner cavity without dead angles and without dripping.

[0038] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automated spraying system for the maintenance of bridge and culvert structures, comprising a drive rod (1), one end of which is connected to an end seat (7), and the end seat (7) is provided with a supporting outer ring (2), characterized in that, Also includes: First support mechanism (4), multiple first support mechanisms (4) are arranged around the outside of the support outer ring (2). The side of the first support mechanism (4) away from the support outer ring (2) is connected to a first spray curing mechanism (5). Spray curing is performed by the first spray curing mechanism (5) moving radially along the support outer ring (2) and contacting the inner side of the component to be cured. Second support mechanism (3), multiple second support mechanisms (3) are arranged around the outside of the support outer ring (2), and the second support mechanism (3) is located between adjacent first support mechanisms (4). The side of the second support mechanism (3) away from the support outer ring (2) is connected to a second spray curing mechanism (6). The second spray curing mechanism (6) is located between adjacent first spray curing mechanisms (5). The second spray curing mechanism (6) moves radially along the support outer ring (2) to contact the inner angle position of the component to be cured for spraying.

2. The automated sprinkler system for bridge and culvert structure maintenance according to claim 1, characterized in that, The first spray maintenance mechanism (5) includes: Rotary sleeve (501), ball bearings are provided on both sides of the rotary sleeve (501), a ball sleeve is rotatably connected in the ball bearing, an extension tube (503) is connected to one end of the ball sleeve, and the ends of the two extension tubes (503) that are far apart are connected to the second spray curing mechanism (6). The rotary sleeve (501) has a liquid inlet, which extends into the drive rod (1) through a pipe. The first patch (504) has a support plate (516) on its top. Both sides of the top of the support plate (516) are located outside the extension tube (503) through fixing collars (510). The first patch (504) is connected to the bottom of the extension tube (503) through a liquid guide tube (517).

3. The automated sprinkler system for the maintenance of bridge and culvert structures according to claim 2, characterized in that, The first spray maintenance mechanism (5) also includes: Two telescopic rods (512) are located on both sides of the first application part (504). A first spring (513) is sleeved on the outside of the telescopic rod (512). A first rotating block (511) and a second rotating block (514) are connected to the two ends of the telescopic rod (512) and the first spring (513), respectively. The first rotating block (511) is rotatably connected to one side of the fixed collar (510). A connecting block (515) is rotatably connected to one side of the second rotating block (514). The connecting block (515) is connected to the top of the support plate (516). The telescopic rod (512) extends and retracts to make the support plate (516) drive the first application part (504) to rotate and apply.

4. The automated sprinkler system for the maintenance of bridge and culvert structures according to claim 2, characterized in that, The first spray maintenance mechanism (5) also includes: The two limiting plates (507) are respectively positioned on both sides of the first application part (504). Each end of one side of the limiting plate (507) is connected to a guide rod (508). The guide rod (508) is slidably connected to the guide hole at the top of the first application part (504). The other ends of the two guide rods (508) are connected to a plate body. A screw seat is embedded on one side of the plate body. An adjusting screw (509) is threaded into the screw seat. The other end of the adjusting screw (509) extends through the hole reserved in the first application part (504) to one side of the limiting plate (507). One end of the adjusting screw (509) is rotatably connected to one side of the limiting plate (507) through a rotating shaft and bearing.

5. The automated spraying system for the maintenance of bridge and culvert structures according to claim 2, characterized in that, The first spray maintenance mechanism (5) also includes: Adhesive strip (506), two adhesive strips (506) are respectively connected to both sides of the first adhesive part (504), the first adhesive part (504) is connected to the liquid outlet hole at the bottom of the support plate (516), wherein the first adhesive part (504) is an absorbent sponge; An overflow tank (505) is provided on one side of the first application part (504) in an array. The overflow tank (505) allows the maintenance liquid to fully wet the surface of the first application part (504). Roller (502) is connected to one side of the rotating sleeve (501) and contacts the inner side of the component to be maintained through roller (502).

6. The automated sprinkler system for the maintenance of bridge and culvert structures according to claim 2, characterized in that, The second spray maintenance mechanism (6) includes: The second application part (601) has an arc-shaped cross-section. A rotating rod (602) is connected to one side of the second application part (601), and a rotating liquid seat (603) is rotatably connected to the other end of the rotating rod (602). The two rotating liquid seats (603) are rotatably connected to each other. An eccentric connecting pipe (604) is connected to the outside of the rotating liquid seat (603). The other end of the eccentric connecting pipe (604) is connected to one end of the extension pipe (503). The arc-shaped second application part (601) moves radially with the second support mechanism (3) to adhere to the inner side of the component to be cured.

7. The automated sprinkler system for the maintenance of bridge and culvert structures according to claim 1, characterized in that, The first support mechanism (4) includes: The first support rod (401) is radially slidably connected to the hole opened on the outer periphery of the support outer ring (2). One end of the first support rod (401) is connected to the first extrusion plate (402). After the first extrusion plate (402) moves, it contacts the second spray curing mechanism (6) at the corresponding position on the outside, so that the second spray curing mechanism (6) fully fits the included angle of the component to be cured. The first force-bearing block (403) is connected to the end of the first support rod (401) away from the first extrusion plate (402); A compression wedge (404) is formed, and a drive ring is connected around the compression wedges (404). A first rotary drive unit (405) is connected to one side of the drive ring. The first rotary drive unit (405) is connected to the outside of the drive rod (1). The drive ring is rotated by the first rotary drive unit (405) to drive the compression wedges (404) to compress the corresponding first force block (403).

8. The automated sprinkler system for the maintenance of bridge and culvert structures according to claim 1, characterized in that, The second support mechanism (3) includes: The second support rod (301) is radially slidably connected to the hole opened on the outer periphery of the support outer ring (2), and one end of the second support rod (301) is connected to the second extrusion plate (302). The second force-bearing block (303) is connected to the end of the second support rod (301) away from the second extrusion plate (302); The extrusion ring (304) is rotatably connected to the outside of the drive rod (1). The extrusion ring (304) includes a plurality of protrusions corresponding to the second force block (303). A second rotation drive part (305) is provided on one side of the extrusion ring (304). The second rotation drive part (305) is installed on the outside of the drive rod (1). The corresponding second force block (303) is extruded by rotating the protrusion of the second rotation drive part (305).

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