Tunnel pipe joint anticorrosion treatment mechanism

Abstract

The application belongs to the technical field of tunnel excavation, in particular to a pipe joint anticorrosion treatment mechanism for tunnels, which comprises an annular body, a guide groove in the shape of a ring is formed on the front end surface of the annular body, a conveying belt is arranged in the guide groove, one end of the conveying belt is rotationally connected to the guide groove, one end of a connecting rod is fixedly connected to one end surface of the conveying belt, a spray head is connected to the other end of the connecting rod, and the spray head is connected to an external pump body through a hose; the anticorrosive paint is injected into the hose through the external pump body and sprayed out of the spray head, and then sprayed on the inclined surface of the inner ring of the steel ring, then the gear is driven to rotate by the motor, the gear is engaged with the clamping teeth on the conveying belt, the conveying belt moves along the guide groove, and the spray head is driven to move by the connecting rod, at the same time, additional spray heads can be arranged on the connecting rod, the additional spray heads spray on the outer surface of the steel ring, the surface of the steel ring is fully painted and anticorrosion treated, and the sealing connection between the two adjacent pipe joints is facilitated.

Description

Technical Field

[0001] This invention belongs to the field of tunnel excavation technology, specifically a corrosion protection mechanism for tunnel pipe sections. Background Technology

[0002] Tunnels are engineering structures buried underground, representing a form of human utilization of underground space. Tunnels can be categorized into traffic tunnels, hydraulic tunnels, municipal tunnels, mining tunnels, and military tunnels. Tunnel construction is characterized by narrow working faces, poor working conditions, numerous procedures, and significant interference. In particular, it is prone to safety accidents, necessitating thorough geological exploration beforehand to rationally select the locations of tunnel entrances and adits, muck transportation routes, and tunnel excavation methods. Tunnel excavation mainly includes tunneling, muck removal, safety support, and auxiliary operations such as ventilation, water, and electricity supply, as well as ventilation and drainage.

[0003] To prevent soil collapse and construction accidents during tunnel excavation, rectangular pipe sections are laid simultaneously with the excavation. These sections are gradually placed within the excavated culvert. Each pipe section is constructed from concrete and reinforced with a steel frame. One end of each section is fitted with a steel collar with a beveled inner surface. The other end of the pipe section has a corresponding bevel, ensuring a tight seal and stability between adjacent sections during splicing. The damp underground soil, along with potential undercurrents during excavation, can corrode the steel collar, affecting the seal and stability between adjacent sections. Therefore, the steel collar undergoes anti-corrosion painting before the pipe sections are lowered into the ground.

[0004] Therefore, the present invention provides a corrosion protection mechanism for tunnel pipe sections. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: A tunnel pipe section anti-corrosion treatment mechanism of this invention includes an annular body, which is rectangular in shape. The corners of the annular body are rounded. A ring-shaped guide groove is opened on the front end face of the annular body. A conveyor belt is provided in the guide groove and is rotatably connected to the guide groove. A ring of teeth is evenly provided on the outer surface of the conveyor belt. The teeth mesh with gears, and the gears are rotatably connected to the guide grooves on both sides of the annular body. One end of the conveyor belt is fixedly connected to one end of a connecting rod, and the other end of the connecting rod is connected to a nozzle. The nozzle is connected to an external pump body through a hose. A crawler crane is used to embed both ends of a U-shaped lifting device into the pre-reserved lifting holes on both sides of the pipe section. When the pipe section is turned over, the crawler crane slowly lifts the component obliquely upwards. As the center of gravity of the pipe section shifts, the lifting device also moves slowly, keeping the lifting device and the center of gravity of the pipe section on the same plumb line until the pipe section is completely lifted. Then, the pipe section is placed on one side of the anti-corrosion treatment mechanism, so that the front end face of the annular body is aligned with the steel collar part on the pipe section. Then, the anti-corrosion paint is injected into the hose through the external pump and sprayed out from the nozzle, spraying onto the inclined surface of the inner ring of the steel collar. Then, the motor drives the gear to rotate, and the gear meshes with the cleats on the conveyor belt. The conveyor belt moves along the guide groove and drives the connecting rod to move the nozzle. At the same time, additional nozzles can be set on the connecting rod. The additional nozzles spray onto the outer surface of the steel collar, fully spraying the steel collar surface for anti-corrosion treatment, which helps to seal the connection between two adjacent pipe sections.

[0007] Preferably, both sides of the annular body are provided with L-shaped connecting plates. One end of the connecting plate is vertically fixed to the annular body, and the other end of the connecting plate extends directly forward of the front end face of the annular body. A hydraulic cylinder is vertically fixed to the other end face of the connecting plate. The piston ends of the hydraulic cylinders are arranged opposite each other, and a pressing plate is fixed to the piston rod end of the hydraulic cylinder. After the pipe section is lifted by the crawler crane, it is difficult for the two sides of the pipe section to align with the two sides of the annular body after each lifting, making it difficult for the anti-corrosion paint sprayed by the nozzle to be effectively sprayed onto the steel collar on the pipe section. For this reason, a hydraulic cylinder is provided. When the pipe section is close to the annular body, the two sides of the pipe section are placed between the two pressing plates. Then the hydraulic cylinder is driven, and the pressing plates simultaneously and synchronously press against the two sides of the pipe section, so that the annular body and the two sides of the pipe section are aligned, thereby ensuring that the anti-corrosion paint at the nozzle spraying point is effectively sprayed onto the steel collar, which helps to seal and protect the pipe section.

[0008] Preferably, a second hydraulic cylinder is symmetrically arranged on the lower surface of the annular body; the end of the second hydraulic cylinder is fixed to the lower surface of the annular body, and a support plate is fixed to the end of the piston rod of the second hydraulic cylinder. The lower surfaces of both ends of the support plate are rotatably connected to spheres. After the pipe section is lifted by a crawler crane, it is difficult for the upper and lower sides of the pipe section to align with the upper and lower sides of the annular body after each lifting. As a result, the anti-corrosion paint sprayed by the nozzle is difficult to effectively spray onto the steel collar on the pipe section. Therefore, a second hydraulic cylinder is set up. The second hydraulic cylinder pushes the annular body so that the upper and lower sides of the annular body are aligned with the upper and lower sides of the pipe section, respectively. Then, the anti-corrosion paint sprayed by the nozzle is effectively sprayed onto the steel collar, thereby more comprehensively spraying anti-corrosion coating on the surface of the steel collar.

[0009] Preferably, the front end face of the conveyor belt is further provided with a rotating rod. One end of the rotating rod is rotatably connected to the inside of one end of the conveyor belt. An external toothed ring is fitted on the outer ring of the rotating rod. The external toothed ring meshes with a toothed rack on the inner side wall surface of the guide groove. The toothed rack is laid along the shape of the guide groove. The other end of the rotating rod extends through to the opening of the guide groove and is provided with a limiting baffle. The limiting baffle is set along the shape of the guide groove. The other end of the rotating rod is provided with a frustum-shaped brush roller. The large end face of the brush roller is fixed to the rotating rod. The tunnel excavation environment contains a lot of soil and gravel, and the steel collar is exposed around the excavation environment. Inevitably, dirt will adhere to the surface. Before spraying the anti-corrosion paint, the surface of the steel collar needs to be cleaned. For this purpose, a brush roller is installed. The brush roller is located in front of the moving path of the spray head. The conveyor belt drives the brush roller to move along the guide groove through the rotating rod. At the same time, the external toothed ring on the rotating rod cooperates with the toothed rack in the guide groove, so that the rotating rod drives the brush roller to rotate. That is, the brush roller moves and rotates at the same time, so that while cleaning the surface of the steel collar, the brush roller rotates and shakes off the dirt on itself. This helps the brush roller to clean the surface of the steel collar for a long time.

[0010] Preferably, the brush of the brush roller is arranged in a spiral shape. Since the steel collar is ring-shaped, when the brush roller cleans the upper edge surface of the steel collar, dirt and dust will fall to the lower edge of the steel collar and then be deposited on the steel collar again. Therefore, by arranging the brush of the brush roller in a spiral shape, when the brush roller rotates, it pushes the dirt and dust on the surface of the steel collar away from the pipe section, so that the dirt and dust are away from the steel collar, reducing the degree of dirt contamination on the painted surface of the lower edge of the steel collar, and helping the anti-corrosion paint to protect the steel collar.

[0011] Preferably, the nozzle includes a housing; the rear end of the housing is connected to a flexible hose, a through hole is formed at the central axis of the housing, a core is provided inside the through hole, the core is rod-shaped, the lower end of the core is fixed to the lower end of the through hole, the upper end of the core is conical, a sleeve is provided in the gap between the core and the through hole, the outer wall of the sleeve is connected to the inner wall of the through hole by a tension spring, liquid outlet holes are symmetrically formed inside the sleeve, one end of the liquid outlet hole extends to the lower end of the sleeve, the other end of the liquid outlet hole extends to the upper end of the sleeve, the other end of the liquid outlet hole is inclined towards the upper end of the sleeve, and the inner surface shape of the sleeve is adapted to the conical shape of the upper end of the core; if the anti-corrosion paint is not sprayed, and the nozzle is used at intervals of 30 minutes or 1 hour, some paint will remain at the nozzle nozzle, and this paint will be in direct contact with the ambient air. As the paint gradually solidifies into a paste, it accumulates and hardens into lumps, obstructing the path of the spray and, in severe cases, clogging the nozzle. To address this, the nozzle is designed with three parts: a housing, a sleeve, and a core. After the anti-corrosion paint is injected from the hose into the through-hole inside the housing, the hydraulic pressure pushes the sleeve upwards and into the outlet hole within the sleeve. The sleeve protrudes from the upper surface of the housing, and the upper end of the core no longer blocks the outlet hole. The paint then exits from the outlet hole, impacting out along the axis of the sleeve. When the nozzle is not in use, the hydraulic pressure in the through-hole is lost, and simultaneously, under the force of a tension spring, the sleeve moves towards the lower end of the hose housing. At this point, the upper end of the core blocks the outlet, isolating the paint in the outlet hole from the external environment, thus prolonging the solidification time and reducing the possibility of the nozzle being blocked by the solidified and dried paint.

[0012] Preferably, a bladder is symmetrically fixed to the upper end of the core, and a compression bladder is symmetrically fixed to the middle position of the core. The compression bladder is connected to the bladder through an air passage opened inside the core. During the downward movement of the sleeve, the inner surface of the sleeve gradually compresses the compression bladder, and the gas in the compression bladder is blown into the bladder. At this time, the bladder is embedded in the upper end of the liquid outlet hole, the bladder expands, and blocks the upper end of the liquid outlet hole, further improving the sealing between the liquid outlet hole and the core, thereby prolonging the solidification time of the paint and reducing the possibility of the nozzle being blocked by the solidification and drying of the paint.

[0013] Preferably, an elastic block is fixed to the upper end of the core. The elastic block is frustoconical, with its large end face fixed to the core. A rubber ring is fixed to the outer ring of the elastic block, and the outer ring of the rubber ring is inclined upward. There is a distance between the upper end of the liquid outlet and the upper end face of the sleeve. Paint can accumulate in this distance. Therefore, an elastic block is provided. When the sleeve retracts into the through hole, the elastic block pushes up to this distance. Then, the outer ring of the rubber ring scrapes and pushes the paint on the surface of this distance upward, exposing the paint to the environment. At the same time, the paint in this distance is scraped clean, reducing the possibility of paint solidification and blockage.

[0014] Preferably, a baffle is fixed to the inner ring of the annular body. The baffle is ring-shaped and conforms to the shape of the inner ring of the annular body. The front and rear ends of the pipe section and the annular body are both through. During painting, the external natural wind may converge along the pipe section and impact the annular body, resisting the atomized paint. This causes some paint to spread along the rear end of the annular body to the surrounding environment. The paint may fall onto the construction equipment or materials, causing pollution. Therefore, a baffle is set up along the inner ring of the annular body. The baffle blocks some of the blown paint, allowing the paint to deposit on the baffle, thereby reducing the pollution of the paint to the surrounding construction equipment or materials.

[0015] Preferably, the inner ring of the baffle is wound with a steel ring, and the outer ring of the baffle is wound with a magnet. The magnets are distributed in a ring shape, and the baffle is attracted to the rear end face of the ring body by the magnet. The steel ring in the inner ring of the baffle enhances the wind resistance of the baffle, so that the baffle can effectively block the paint. The outer ring of the baffle is attracted to the ring body by the magnet, which facilitates the disassembly and cleaning of the baffle.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. The anti-corrosion treatment mechanism for tunnel pipe sections described in this invention injects anti-corrosion paint into a hose via an external pump and sprays it out from a nozzle onto the inclined surface of the inner ring of a steel collar. Then, a motor drives a gear to rotate, and the gear meshes with a toothed cleat on a conveyor belt. The conveyor belt moves along a guide groove and moves the nozzle by driving a connecting rod. An additional nozzle can also be installed on the connecting rod to spray paint onto the outer surface of the steel collar, thus fully treating the steel collar surface with anti-corrosion paint and facilitating a sealed connection between adjacent pipe sections.

[0018] 2. The anti-corrosion treatment mechanism for tunnel pipe sections described in this invention, by setting up a No. 1 hydraulic cylinder and a No. 2 hydraulic cylinder, after the pipe section is lifted, adjusts the position between the annular body and the pipe section so that the edge of the annular body is opposite to the edge of the pipe section. This helps the nozzle to be aligned with the steel collar on the pipe section, so that the sprayed paint is effectively sprayed onto the steel collar, thus providing more effective anti-corrosion protection for the steel collar. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the anti-corrosion treatment mechanism in this invention;

[0021] Figure 2 This is a cross-sectional view of the annular body in this invention;

[0022] Figure 3 This is a diagram showing the interaction between the brush roller and the conveyor belt in this invention;

[0023] Figure 4This is a cross-sectional view of the nozzle in this invention;

[0024] Figure 5 yes Figure 4 Enlarged view of a portion of point A in the middle;

[0025] Figure 6 This is a perspective view of the sleeve in this invention;

[0026] Figure 7 This is a diagram showing the fit between the baffle and the annular body in this invention;

[0027] In the diagram: 1. Ring body; 2. Guide groove; 3. Conveyor belt; 4. Gear; 5. Nozzle; 6. Connecting plate; 7. No. 1 hydraulic cylinder; 8. Extrusion plate; 9. No. 2 hydraulic cylinder; 10. Support plate; 11. Rotating rod; 12. External toothed ring; 13. Rack; 14. Limiting baffle; 15. Brush roller; 16. Brush; 17. Housing; 18. Through hole; 19. Core; 20. Sleeve; 21. Liquid outlet; 22. Bag; 23. Extrusion bag; 24. Air passage; 25. Elastic block; 26. Rubber ring; 27. Protective cloth. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0029] Example 1:

[0030] Reference Figure 1 and Figure 2 A tunnel pipe section anti-corrosion treatment mechanism includes an annular body 1, which is rectangular in shape with rounded corners. A ring-shaped guide groove 2 is formed on the front end face of the annular body 1. A conveyor belt 3 is installed within the guide groove 2 and rotatably connected to it. A ring of teeth is evenly distributed on the outer surface of the conveyor belt 3, meshing with a gear 4. The gear 4 is rotatably connected to the guide grooves 2 on both sides of the annular body 1. One end of the conveyor belt 3 is fixedly connected to one end of a connecting rod, and the other end of the connecting rod is connected to a nozzle 5. The nozzle 5 is connected to an external pump body via a flexible hose. During tunnel excavation, to prevent soil collapse and construction accidents, this mechanism is used during excavation... During the process, rectangular pipe sections were laid simultaneously with excavation, gradually being placed into the excavated culvert. The pipe sections were constructed from concrete and reinforced with a steel frame. One end of each pipe section was fitted with a steel collar with an inclined inner surface. The other end of the pipe section had an inclined surface matching the steel collar, ensuring the sealing and stability between adjacent pipe sections during splicing. The underground soil was moist, and during excavation, there were also undercurrents. This damp environment could corrode the steel collar, affecting the sealing and stability between adjacent pipe sections. Therefore, the steel collar needed to be painted for corrosion protection before the pipe sections were laid underground.

[0031] Using a crawler crane, the two ends of the U-shaped lifting device are inserted into the pre-reserved lifting holes on both sides of the pipe section. When the pipe section is turned over, the crawler crane slowly lifts the component diagonally upward. As the center of gravity of the pipe section moves, the lifting device also moves slowly, keeping the lifting device and the center of gravity of the pipe section on the same plumb line, until the pipe section is completely lifted. Then, the pipe section is placed on one side of the anti-corrosion treatment mechanism, so that the front end face of the annular body 1 is aligned with the steel collar part on the pipe section. Then, the anti-corrosion paint is injected into the hose through the external pump and sprayed out from the nozzle 5, spraying onto the inclined surface of the inner ring of the steel collar. Then, the motor drives the gear 4 to rotate, and the gear 4 meshes with the teeth on the conveyor belt 3. The conveyor belt 3 moves along the guide groove 2 and drives the nozzle 5 to move through the connecting rod. At the same time, additional nozzles 5 can also be set on the connecting rod. The additional nozzles 5 spray onto the outer surface of the steel collar, fully spraying the surface of the steel collar with paint for anti-corrosion treatment, which helps to seal the connection between two adjacent pipe sections.

[0032] Reference Figure 1 and Figure 2 Both sides of the annular body 1 are provided with L-shaped connecting plates 6. One end of the connecting plate 6 is vertically fixed to the annular body 1, and the other end of the connecting plate 6 extends directly forward of the front end face of the annular body 1. A hydraulic cylinder 7 is vertically fixed to the other end face of the connecting plate 6. The piston ends of the hydraulic cylinder 7 are arranged opposite each other, and a pressing plate 8 is fixed to the piston rod end of the hydraulic cylinder 7. After the pipe section is lifted by the crawler crane, it is difficult for the two sides of the pipe section to align with the two sides of the annular body 1 after each lifting, making it difficult for the anti-corrosion paint sprayed by the nozzle 5 to be effectively sprayed on the steel collar on the pipe section. For this reason, a hydraulic cylinder 7 is set up. When the pipe section is close to the annular body 1, the two sides of the pipe section are placed between the two pressing plates 8. Then the hydraulic cylinder 7 is driven, and the pressing plates 8 simultaneously and synchronously press the two sides of the pipe section, so that the annular body 1 and the two sides of the pipe section are aligned, thereby ensuring that the anti-corrosion paint sprayed by the nozzle 5 is effectively sprayed on the steel collar, which helps to seal and protect the pipe section.

[0033] Reference Figure 1 The lower surface of the annular body 1 is symmetrically provided with a second hydraulic cylinder 9; the end of the second hydraulic cylinder 9 is fixed to the lower surface of the annular body 1, and the piston rod end of the second hydraulic cylinder 9 is fixed to a support plate 10, and the lower surfaces of both ends of the support plate 10 are rotatably connected to a ball; after the pipe section is lifted by a crawler crane, it is difficult for the upper and lower sides of the pipe section to align with the upper and lower sides of the annular body 1 after each lifting, so that the anti-corrosion paint sprayed by the nozzle 5 is difficult to effectively spray onto the steel collar on the pipe section. For this reason, a second hydraulic cylinder 9 is set up, which pushes the annular body 1 so that the upper and lower sides of the annular body 1 are aligned with the upper and lower sides of the pipe section respectively, and then the anti-corrosion paint sprayed by the nozzle 5 is effectively sprayed onto the steel collar, thereby more comprehensively spraying anti-corrosion coating on the surface of the steel collar.

[0034] Reference Figure 3The front end of the conveyor belt 3 is also provided with a rotating rod 11. One end of the rotating rod 11 is rotatably connected to the inside of one end of the conveyor belt 3. An external toothed ring 12 is fitted on the outer ring of the rotating rod 11. The external toothed ring 12 meshes with a rack 13 on the inner side wall surface of the guide groove 2. The rack 13 is laid along the shape of the guide groove 2. The other end of the rotating rod 11 extends to the opening of the guide groove 2 and is provided with a limiting baffle 14. The limiting baffle 14 is set along the shape of the guide groove 2. The other end of the rotating rod 11 is provided with a frustum-shaped brush roller 15. The large end face of the brush roller 15 is fixed to the rotating rod 11. The tunnel excavation environment contains a lot of soil and gravel, and the steel collar is exposed to the surrounding environment. Since dirt inevitably adheres to the surface of the steel collar, it is necessary to clean the surface of the steel collar before spraying the anti-corrosion paint. For this purpose, a brush roller 15 is set up. The brush roller 15 is located in front of the moving path of the spray head 5. The conveyor belt 3 drives the brush roller 15 to move along the guide groove 2 through the rotating rod 11. At the same time, the outer toothed ring 12 on the rotating rod 11 cooperates with the rack 13 in the guide groove 2, so that the rotating rod 11 drives the brush roller 15 to rotate. That is, the brush roller 15 moves and rotates at the same time, so that while cleaning the surface of the steel collar, the brush roller 15 rotates on its own, and the dirt on it is shaken off by its rotation. This helps the brush roller 15 to clean the surface of the steel collar for a long time.

[0035] Reference Figure 3 The brushes 16 of the brush roller 15 are arranged in a spiral shape. Since the steel collar is ring-shaped, when the brush roller 15 cleans the upper edge surface of the steel collar, dirt and dust will fall to the lower edge of the steel collar and then be deposited on the steel collar again. Therefore, by arranging the brushes 16 of the brush roller 15 in a spiral shape, when the brush roller 15 rotates, the dirt and dust on the surface of the steel collar are pushed away from the pipe section, so that the dirt and dust are away from the steel collar, reducing the degree of dirt contamination on the painted surface of the lower edge of the steel collar, which helps the anti-corrosion paint protect the steel collar.

[0036] Reference Figure 4The nozzle 5 includes a housing 17; the rear end of the housing 17 is connected to a flexible hose, and a through hole 18 is opened at the central axis of the housing 17. A core 19 is provided inside the through hole 18. The core 19 is rod-shaped, with its lower end fixed to the lower end of the hole in the through hole 18 and its upper end conical. A sleeve 20 is provided in the gap between the core 19 and the through hole 18. The outer wall of the sleeve 20 is connected to the inner wall of the through hole 18 by a tension spring. The sleeve 20 has symmetrical openings inside. A liquid outlet 21 is provided, with one end extending to the lower end of the sleeve 20 and the other end extending to the interior of the upper port of the sleeve 20. The other end of the liquid outlet 21 is inclined towards the upper port of the sleeve 20, and the inner surface shape of the sleeve 20 is adapted to the conical shape of the upper end of the core 19. If the anti-corrosion paint is not sprayed out, and the spray nozzle 5 is used at intervals of 30 minutes or 1 hour, some paint residue will remain at the spray nozzle 5, and this residue will directly come into contact with the ambient air. Upon contact, the paint gradually solidifies into a paste. Over time, the paint accumulates and solidifies into lumps, obstructing the path of the paint spray and, in severe cases, clogging the nozzle 5. Therefore, the nozzle 5 is designed with three parts: a housing 17, a sleeve 20, and a core 19. After the anti-corrosion paint is injected from the hose into the through-hole 18 inside the housing 17, the hydraulic pressure of the paint pushes up the sleeve 20 and into the outlet hole 21 inside the sleeve 20. The sleeve 20 is pushed upwards and protrudes from the upper end face of the housing 17, and the upper end of the core 19 is no longer blocked. The paint is discharged from the liquid outlet 21 by impact along the axis of the sleeve 20. When the nozzle 5 is not in use, the hydraulic pressure in the through hole 18 is lost. At the same time, under the force of the tension spring, the sleeve 20 moves towards the lower end of the hose housing 17. At this time, the upper end of the core 19 blocks the liquid outlet, thus isolating the paint in the liquid outlet 21 from the external environment, thereby prolonging the solidification time of the paint and reducing the possibility of the nozzle 5 being blocked by the solidification and drying of the paint.

[0037] Reference Figure 4 , Figure 5 and Figure 6 The upper end of the core 19 is symmetrically fixed with a bladder 22, and the middle position of the core 19 is symmetrically fixed with a compression bladder 23. The compression bladder 23 is connected to the bladder 22 through an air passage 24 opened inside the core 19. During the downward movement of the sleeve 20, the inner surface of the sleeve 20 gradually squeezes the compression bladder 23, and the gas in the compression bladder 23 is blown into the bladder 22. At this time, the bladder 22 is embedded in the upper end of the liquid outlet 21. The bladder 22 expands and blocks the upper end of the liquid outlet 21, further improving the sealing between the liquid outlet 21 and the core 19, thereby prolonging the solidification time of the paint and reducing the possibility of the nozzle 5 being blocked by the solidification and drying of the paint.

[0038] Reference Figure 5An elastic block 25 is fixedly connected to the upper end of the core 19. The elastic block 25 is frustoconical in shape, and the large end face of the elastic block 25 is fixedly connected to the core 19. A rubber ring 26 is fixedly connected to the outer ring of the elastic block 25, and the outer ring of the rubber ring 26 is inclined upward. There is a distance between the upper end of the liquid outlet 21 and the upper end face of the sleeve 20. Paint can accumulate in this distance. Therefore, the elastic block 25 is provided. When the sleeve 20 retracts into the through hole 18, the elastic block 25 pushes up to this distance. Then, the outer ring of the rubber ring 26 scrapes the paint on the surface of this distance and pushes it out, exposing the paint to the environment. At the same time, the paint in this distance is scraped clean, reducing the possibility of paint solidification and blockage.

[0039] Example 2:

[0040] Reference Figure 7 Compared with Embodiment 1, as another embodiment of the present invention, the inner ring of the annular body 1 is fixed with a baffle 27, which is ring-shaped and adapted to the shape of the inner ring of the annular body 1. The front and rear ends of the pipe section and the annular body 1 are both through. During painting, the external natural wind may converge along the pipe section and impact the annular body 1, resisting the atomized paint, causing some paint to spread along the rear end of the annular body 1 to the surrounding environment. The paint falls onto the construction equipment or materials, causing pollution. Therefore, the baffle 27 is set up. The baffle 27 is set along the inner ring of the annular body 1. The baffle blocks some of the blown paint, so that the paint is deposited on the baffle 27, thereby reducing the pollution of the paint to the surrounding construction equipment or materials.

[0041] The shield 27 has a steel ring wound inside and a magnet wound on the outer ring. The magnets are distributed in a ring shape, and the shield 27 is attracted to the rear end face of the ring body 1 by the magnet. The steel ring in the inner ring of the shield 27 enhances the wind resistance of the shield, so that the shield 27 can effectively block the paint. The outer ring of the shield 27 is attracted to the ring body 1 by the magnet, which facilitates the disassembly and cleaning of the shield 27.

[0042] Working principle: Using a crawler crane, the two ends of the U-shaped lifting device are embedded into the pre-reserved lifting holes on both sides of the pipe section. When the pipe section is turned over, the crawler crane slowly lifts the component obliquely upward. As the center of gravity of the pipe section moves, the lifting device also moves slowly, keeping the lifting device and the center of gravity of the pipe section on the same plumb line until the pipe section is completely lifted. Then, the pipe section is placed on one side of the anti-corrosion treatment mechanism, so that the front end face of the ring body 1 is aligned with the steel collar part on the pipe section. Then, through the external pump body, the anti-corrosion paint is injected into the hose and sprayed out from the nozzle 5, spraying on the inclined surface of the inner ring of the steel collar. Then, the motor drives the gear 4 to rotate, and the gear 4 meshes with the teeth on the conveyor belt 3. The conveyor belt 3 moves along the guide groove 2 and drives the nozzle 5 to move through the connecting rod. At the same time, an additional nozzle 5 can be set on the connecting rod. The additional nozzle 5 sprays on the outer surface of the steel collar, fully spraying the surface of the steel collar with paint for anti-corrosion treatment, which helps the sealing connection between two adjacent pipe sections.

[0043] After the pipe section is lifted by a crawler crane, it is difficult for the two sides of the pipe section to align with the two sides of the annular body 1 after each lifting. This makes it difficult for the anti-corrosion paint sprayed by the nozzle 5 to be effectively sprayed onto the steel collar on the pipe section. To address this, a hydraulic cylinder 7 is installed. When the pipe section is close to the annular body 1, the two sides of the pipe section are placed between two extrusion plates 8. Then, the hydraulic cylinder 7 is driven, and the extrusion plates 8 simultaneously and synchronously extrude towards the two sides of the pipe section, so that the annular body 1 is aligned with the two sides of the pipe section. This ensures that the anti-corrosion paint sprayed by the nozzle 5 is effectively sprayed onto the steel collar, which helps to seal and protect the pipe section.

[0044] After the pipe section is lifted by the crawler crane, it is difficult for the upper and lower sides of the pipe section to align with the upper and lower sides of the annular body 1 after each lifting. As a result, the anti-corrosion paint sprayed by the nozzle 5 cannot be effectively sprayed onto the steel collar on the pipe section. To address this, a second hydraulic cylinder 9 is installed. The second hydraulic cylinder 9 pushes the annular body 1 so that the upper and lower sides of the annular body 1 are aligned with the upper and lower sides of the pipe section, respectively. Then, the anti-corrosion paint sprayed by the nozzle 5 is effectively sprayed onto the steel collar, thereby providing a more comprehensive anti-corrosion coating on the surface of the steel collar.

[0045] The tunnel excavation environment contains a lot of soil and gravel, and the steel collar is exposed to the surrounding environment, so it is inevitable that soil will adhere to its surface. Before spraying the anti-corrosion paint, the surface of the steel collar needs to be cleaned. For this purpose, a brush roller 15 is set up. The brush roller 15 is set in front of the moving path of the spray head 5. The conveyor belt 3 drives the brush roller 15 to move along the guide groove 2 through the rotating rod 11. At the same time, the outer toothed ring 12 on the rotating rod 11 cooperates with the rack 13 in the guide groove 2, so that the rotating rod 11 drives the brush roller 15 to rotate. That is, the brush roller 15 moves and rotates at the same time, so that while cleaning the surface of the steel collar, the brush roller 15 rotates on its own, and the soil on it is thrown off by the rotation of the brush roller 15. This helps the brush roller 15 to clean the surface of the steel collar for a long time.

[0046] Because the steel collar is ring-shaped, when the brush roller 15 cleans the upper edge surface of the steel collar, dirt and dust will fall to the lower edge of the steel collar and then be deposited on the steel collar again. Therefore, the brush 16 of the brush roller 15 is set in a spiral shape. When the brush roller 15 rotates, it pushes the dirt and dust on the surface of the steel collar away from the pipe section, so that the dirt and dust are away from the steel collar and the degree of dirt contamination on the painted surface of the lower edge of the steel collar is reduced, which helps the anti-corrosion paint to protect the steel collar.

[0047] If the anti-corrosion paint is not sprayed out, and the spray nozzle 5 is used at intervals of 30 minutes or 1 hour, some paint will remain at the nozzle nozzle 5. This paint will come into direct contact with the ambient air and gradually solidify into a paste. Over time, the paint will accumulate and solidify into lumps, obstructing the spray path and, in severe cases, clogging the nozzle nozzle 5. Therefore, the spray nozzle 5 is designed with three parts: a housing 17, a sleeve 20, and a core 19. After the anti-corrosion paint is injected from the hose into the through-hole 18 inside the housing 17, the hydraulic pressure of the paint pushes up the sleeve 20 and injects it into the outlet hole 21 inside the sleeve 20. The upper end of the sleeve 20 protrudes from the upper end of the housing 17, and the upper end of the core 19 no longer blocks the liquid outlet 21. The paint is discharged from the liquid outlet 21 and impacted out along the axis of the sleeve 20. When the nozzle 5 is not in use, the hydraulic pressure in the through hole 18 is lost. At the same time, under the force of the tension spring, the sleeve 20 moves towards the lower end of the hose housing 17. At this time, the upper end of the core 19 blocks the liquid outlet, so that the paint in the liquid outlet 21 is isolated from the external environment, thereby prolonging the solidification time of the paint and reducing the possibility of the nozzle 5 being blocked by the solidification and drying of the paint.

[0048] During the downward movement of the sleeve 20, the inner surface of the sleeve 20 gradually squeezes the compression bladder 23. The gas in the compression bladder 23 is blown into the bladder body 22. At this time, the bladder body 22 is embedded in the upper end of the liquid outlet hole 21. The bladder body 22 expands and blocks the upper end of the liquid outlet hole 21, further improving the sealing between the liquid outlet hole 21 and the core 19, thereby prolonging the solidification time of the paint and reducing the possibility of the nozzle 5 being blocked by the solidification and drying of the paint.

[0049] There is a distance between the upper end of the outlet hole 21 and the upper end face of the sleeve 20. Paint can accumulate in this distance. To address this, an elastic block 25 is provided. During the process of the sleeve 20 retracting into the through hole 18, the elastic block 25 pushes up to this distance. Then, the outer ring of the rubber ring 26 scrapes the paint on the surface of this distance and pushes it out, exposing the paint to the environment. At the same time, the paint in this distance is scraped clean, reducing the possibility of paint solidification and blockage.

[0050] Both the front and rear ends of the pipe section and the annular body 1 are open. During painting, the external natural wind may converge along the pipe section and impact the annular body 1, resisting the atomized paint. This causes some paint to spread along the rear end of the annular body 1 to the surrounding environment. The paint may fall onto the construction equipment or materials, causing pollution. To address this, a baffle 27 is installed along the inner ring of the annular body 1. The baffle blocks some of the blown paint, causing the paint to deposit on the baffle 27, thereby reducing the pollution of the paint to the surrounding construction equipment or materials.

[0051] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0052] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion protection mechanism for tunnel pipe sections, characterized in that: The device includes an annular body (1), which is rectangular in shape. The corners of the annular body (1) are rounded. A ring-shaped guide groove (2) is opened on the front end face of the annular body (1). A conveyor belt (3) is provided in the guide groove (2). The conveyor belt (3) is rotatably connected to the guide groove (2). A ring of teeth is evenly provided on the outer surface of the conveyor belt (3). The teeth mesh with a gear (4). The gear (4) is rotatably connected to the guide grooves (2) on both sides of the annular body (1). One end of the conveyor belt (3) is fixedly connected to one end of a connecting rod. The other end of the connecting rod is connected to a nozzle (5). The nozzle (5) is connected to an external pump body through a hose. The nozzle (5) includes a housing (17); the rear end of the housing (17) is connected to a flexible hose, and a through hole (18) is opened at the central axis of the housing (17). A core (19) is provided inside the through hole (18). The core (19) is rod-shaped, and the lower end of the core (19) is fixed to the lower end of the hole in the through hole (18). The upper end of the core (19) is conical. A sleeve (20) is provided in the gap between the core (19) and the through hole (18). The outer wall of 0) is connected to the inner wall of the through hole (18) by a tension spring. The sleeve (20) has symmetrical liquid outlet holes (21) inside. One end of the liquid outlet hole (21) extends to the lower end of the sleeve (20), and the other end of the liquid outlet hole (21) extends to the inside of the upper port of the sleeve (20). The other end of the liquid outlet hole (21) is inclined to the upper port of the sleeve (20), and the inner surface shape of the sleeve (20) is adapted to the upper conical shape of the core (19). The upper end of the core (19) is symmetrically fixed with a bladder (22), and the middle position of the core (19) is symmetrically fixed with a compression bladder (23). The compression bladder (23) is connected to the bladder (22) through an airway (24) opened inside the core (19). An elastic block (25) is fixed to the upper end of the core (19). The elastic block (25) is frustum-shaped. The large end face of the elastic block (25) is fixed to the core (19). A rubber ring (26) is fixed to the outer ring of the elastic block (25). The outer ring of the rubber ring (26) is inclined upward.

2. The anti-corrosion treatment mechanism for tunnel pipe sections according to claim 1, characterized in that: Both sides of the annular body (1) are provided with L-shaped connecting plates (6). One end of the connecting plate (6) is vertically fixed to the annular body (1), and the other end of the connecting plate (6) extends directly forward to the front end face of the annular body (1). A hydraulic cylinder (7) is vertically fixed to the other end face of the connecting plate (6). The piston ends of the hydraulic cylinder (7) are arranged opposite each other, and a pressing plate (8) is fixed to the piston rod end of the hydraulic cylinder (7).

3. The anti-corrosion treatment mechanism for tunnel pipe sections according to claim 2, characterized in that: The lower surface of the annular body (1) is symmetrically provided with a second hydraulic cylinder (9); the end of the second hydraulic cylinder (9) is fixed to the lower surface of the annular body (1), and the piston rod end of the second hydraulic cylinder (9) is fixed to a support plate (10), and the lower surfaces of both ends of the support plate (10) are rotatably connected to a sphere.

4. The anti-corrosion treatment mechanism for tunnel pipe sections according to claim 1, characterized in that: The front end of the conveyor belt (3) is also provided with a rotating rod (11). One end of the rotating rod (11) is rotatably connected to the inside of one end of the conveyor belt (3). An external toothed ring (12) is fitted on the outer ring of the rotating rod (11). The external toothed ring (12) meshes with a toothed rack (13) on the inner side wall surface of the guide groove (2). The toothed rack (13) is laid along the shape of the guide groove (2). The other end of the rotating rod (11) extends through to the opening of the guide groove (2) and is provided with a limiting baffle (14). The limiting baffle (14) is set along the shape of the guide groove (2). The other end of the rotating rod (11) is provided with a frustum-shaped brush roller (15). The large end face of the brush roller (15) is fixed to the rotating rod (11).

5. The anti-corrosion treatment mechanism for tunnel pipe sections according to claim 4, characterized in that: The brushes (16) of the brush roller (15) are arranged in a spiral shape.

6. The anti-corrosion treatment mechanism for tunnel pipe sections according to claim 3, characterized in that: The inner ring of the annular body (1) is fixed with a baffle (27), which is ring-shaped and conforms to the shape of the inner ring of the annular body (1).

7. The anti-corrosion treatment mechanism for tunnel pipe sections according to claim 6, characterized in that: The inner ring of the baffle (27) is wound with a steel ring, and the outer ring of the baffle (27) is wound with a magnet. The magnets are distributed in a ring shape, and the baffle (27) is attracted to the rear end face of the ring body (1) by the magnet.

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