Derusting and painting device for underground pipeline

Abstract

The invention relates to the technical field of pipeline rust removal, and discloses an underground pipeline rust removal and painting device which comprises symmetrically-arranged supports, each support comprises a base, stand columns fixed to the base and a top plate connected with the tops of the two stand columns, and two lower riding wheels capable of horizontally moving in the same direction or opposite directions along the X axis are arranged on each base; an upper pressing wheel is arranged over the two lower supporting wheels and installed on a lifting plate, and the lifting plate is driven by a Z-axis moving assembly arranged in the stand column to ascend and descend along the Z axis. The three-point type clamping structure guarantees stable operation of the pipeline, the integrated assembly achieves continuous operation of rust removal, recycling, preheating and painting, working procedure connection is smooth, the scrap heat recycling design is adopted, energy conservation and environmental protection are achieved, the paint film quality is improved, the multi-dimensional adjusting structure is matched with pipelines with different pipe diameters, and universality is high; batch processing can be achieved through multi-device linkage, and efficiency is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of pipeline rust removal technology, specifically to a device for rust removal and painting of underground pipelines. Background Technology

[0002] In harsh environments such as underground mines, pipelines are prone to corrosion on their outer surface after long-term service, requiring regular rust removal and repainting to extend their service life. Currently, maintenance of these pipelines often involves simple tooling combined with manual operation: the pipeline is placed on a support frame, supported and rotated by rollers at both ends, while workers use handheld angle grinders, paint guns, and other equipment to work on the pipeline surface. This method has the following drawbacks: 1. Low level of automation and low efficiency: It relies too much on manual hand operation, which is labor-intensive and makes it difficult to guarantee the uniformity and quality of rust removal and painting, resulting in low work efficiency. 2. Unstable pipeline operation: Simple roller support is difficult to effectively limit the radial runout of the pipeline, especially at high speeds, the runout is more serious, which leads to unstable contact between the rust removal / painting tools and the pipe wall, affecting the treatment effect and even posing safety hazards. 3. Discontinuous process flow: Rust removal and painting are two independent processes that require tool changes and workstation adjustments, resulting in process interruptions and making continuous operation difficult; 4. Poor adaptability: For pipes of different diameters, the support frame needs to be adjusted or replaced, which is cumbersome and lacks flexibility.

[0003] Therefore, there is an urgent need for a specialized device that can automatically, stably, and continuously complete rust removal and painting operations, and can adapt to different pipe diameters. Summary of the Invention

[0004] The present invention aims to solve the problems of low automation, unstable pipeline operation, discontinuous process and poor adaptability in the existing technology of pipeline rust removal and painting, and provides a special device that can automatically, stably and continuously complete rust removal and painting, and has good pipe diameter adaptability.

[0005] The present invention proposes a rust removal and painting device for underground pipelines, comprising symmetrically arranged supports. The supports include a base, columns fixed on the base, and a top plate connecting the tops of the two columns. The base is provided with two lower support rollers that can move horizontally towards or away from each other along the X-axis. An upper pressure roller is provided directly above the two lower support rollers. The upper pressure roller is mounted on a lifting plate. The lifting plate is driven to move up and down along the Z-axis by a Z-axis moving component provided in the column. The bottom of the top plate is provided with a horizontally movable suspension rod, the lower end of which is connected to a Y-axis moving assembly, and the movable end of the Y-axis moving assembly is equipped with a rust removal and painting assembly. The rust removal and painting assembly includes a mounting base, and a polishing wheel, a waste heat recovery unit, and a painting spray gun arranged sequentially on the mounting base along the Y-axis moving direction; The lower support roller and the upper pressure roller form a three-point clamping structure, which effectively limits the radial runout of the pipeline and ensures operational stability. The X-axis and Z-axis moving components adjust the distance between the support rollers and the height of the pressure rollers to adapt to pipelines of different diameters, making it highly versatile. The rust removal and painting components integrate a polishing wheel, a waste heat recovery unit, and a painting spray gun, enabling continuous operation of rust removal, recovery, preheating, and painting without interrupting the process, greatly improving efficiency. The Y-axis moving components drive the components to move along the pipeline axis, which, together with the rotation of the pipeline, forms a full surface coverage treatment, ensuring uniform operation.

[0006] As a further optimization of the present invention, the waste heat recovery device includes a miniature air pump, a filter box, and an air jet pipe; The filter box is mounted on the mounting base and located between the polishing wheel and the paint spray gun. At least one collection pipe is connected to the side of the filter box near the pipe, and the other side of the filter box is connected to the air inlet of the micro air pump through a connecting pipe. The exhaust port of the micro air pump is connected to the jet pipe, and the outlet of the jet pipe is oriented towards the surface of the pipe. The collection pipe absorbs rust removal waste and friction-heated air, while the filter box separates the waste, preventing environmental and paint film pollution. The micro air pump blows the purified hot air onto the pipe surface through the jet pipe, realizing waste heat recovery and preheating. This not only accelerates paint film curing and prevents sagging, but also enhances paint film adhesion. Recovery and preheating are carried out simultaneously, requiring no additional energy, which is energy-saving, environmentally friendly, and improves the quality of painting.

[0007] As a further optimization of the present invention, the inlet end of the collection pipe is provided with a flared mouth, and the bottom of the filter box is provided with an openable and closable discharge port. The flared mouth expands the collection range, improves the absorption efficiency of waste and hot air, and ensures the cleanliness of the working surface. The discharge port at the bottom of the filter box facilitates the centralized cleaning of waste, avoids accumulation that affects the recycling effect, and makes maintenance convenient without interrupting the operation process.

[0008] As a further optimization of the present invention, the number of collection pipes and filter boxes is multiple and they are evenly distributed circumferentially on the outside of the polishing wheel to achieve all-round chip and heat collection, avoid omission, and improve recycling efficiency through multiple sets of designs. This ensures uniform preheating of the pipe surface, further guarantees the quality of painting, and adapts to the needs of full-circumference pipe treatment.

[0009] As a further optimized solution of the present invention, the feature is that: a box is installed on the side of the mounting base near the pipe, the polishing wheel is rotatably mounted on the box via a rotating shaft, a gear is fixed on the rotating shaft, and a rack parallel to the pipe axis is fixedly mounted on the device, and the gear meshes with the rack for transmission. The meshing of gears and racks allows the polishing wheel to rotate automatically while moving along the pipe axis, eliminating the need for an additional drive motor. This simplifies the structure and saves energy. The rotation and movement work together to improve rust removal efficiency and effectiveness, ensuring uniform polishing of the pipe surface and laying a good foundation for painting.

[0010] As a further optimization of the present invention, the base is equipped with an X-axis moving assembly for driving the lower support roller to move. The X-axis moving assembly includes a bidirectional lead screw rotatably disposed in a movable groove inside the base, and two connecting plates respectively threaded to both ends of the bidirectional lead screw. A support roller seat is installed at the bottom of the lower support roller, and the support roller seat is slidably disposed on the upper end surface of the base. One end of the connecting plate extends to the outside of the movable groove and is fixed to the side of the support roller seat. The reverse thread of the bidirectional lead screw causes the two lower support rollers to move synchronously towards or away from each other, ensuring that the pipeline is always centered and achieving automatic alignment. The support roller seat slides with the base, ensuring smooth movement and precise adjustment. The opening of the movable slot is located on the side to prevent waste from falling in and affecting the operation of the components, ensuring the long-term stability of the adjustment mechanism.

[0011] As a further optimization of the present invention, the Z-axis moving component is a lead screw and nut mechanism. The lead screw is driven by a handwheel, and the nut is connected to the lifting plate. The handwheel-driven lead screw and nut mechanism is easy to operate and can accurately adjust the clamping force of the upper pressure roller, adapting to the constraint requirements of pipes with different diameters. The self-locking characteristic of the lead screw thread ensures stable positioning of the lifting plate, prevents the pressure roller from loosening when the pipe rotates, and ensures operational stability.

[0012] As a further optimization of the present invention, the boom is connected to a horizontal drive mechanism located inside the top plate. The horizontal drive mechanism is either a screw and nut mechanism or a linear motor. The screw and nut mechanism is precise in adjustment and runs smoothly, making it suitable for scenarios with high precision requirements. The linear motor is fast in response and efficient, making it suitable for batch and rapid operations. The two drive methods can be flexibly selected to achieve precise adjustment of the horizontal position of the boom and ensure that the distance between the rust removal and painting components and the pipe is compatible.

[0013] As a further optimization of the present invention, at least one of the lower support rollers is a drive roller, which is driven to rotate by a fixed drive assembly. Both the lower support roller and the upper pressure roller are rubber rollers. The drive roller drives the pipe to rotate through the drive assembly. The rubber roller material increases friction to prevent slippage and ensure that the pipe rotates at a uniform speed. The rubber roller is soft to avoid scratching the pipe surface and also buffers vibration, further improving operational stability.

[0014] As a further optimization of the present invention, multiple devices can be arranged side by side, and the active lower support rollers of each device are linked together through chain drive or synchronous belt drive mechanism to realize batch processing of multiple pipelines, greatly improving work efficiency. Chain drive or synchronous belt drive ensures that the active wheels of each device operate synchronously, ensuring the consistency of multi-pipeline processing and adapting to the needs of large-scale pipeline maintenance.

[0015] The rust removal and painting device for downhole pipelines proposed in this invention has the following beneficial effects: (i) By integrating rust removal and painting functions into one, continuous operation of rust removal, preheating and spraying is achieved, which significantly improves work efficiency and quality; (ii) The structure of lower support rollers and upper pressure rollers is adopted to effectively limit the radial runout of the pipeline and ensure the stability of the rust removal and painting process; (iii) The distance between the lower support rollers can be adjusted by the X-axis moving component, and the height of the upper pressure roller can be adjusted by the Z-axis moving component, which can adapt to pipes of different diameters; (iv) Install a waste heat recovery device to collect rust removal waste and use hot air to preheat the surface of the pipes, thereby improving the adhesion of the paint film and the drying speed.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the positioning structure for the smallest size pipe according to the present invention; Figure 2 This is a schematic diagram of the positioning structure for the largest size pipe according to the present invention; Figure 3 This is a partial side view of the structure of the present invention; Figure 4 This is a top view of the Y-axis moving component of the present invention; Figure 5 This is a top view of the rust removal and painting assembly in one embodiment of the present invention.

[0018] Figure Descriptions: 1. Base; 2. Column; 3. Top Plate; 4. Lower Support Roller; 5. Upper Pressure Roller; 6. Lifting Plate; 7. Rust Removal and Painting Assembly; 71. Mounting Base; 72. Grinding Wheel; 73. Painting Spray Gun; 8. Protective Cover; 9. Y-axis Moving Assembly; 10. Hanging Rod; 11. Support Roller Seat; 12. Movable Slot; 13. Two-way Lead Screw; 14. Connecting Plate; 15. Drive Assembly; 16. Box Body; 17. Rotating Shaft; 18. Gear; 19. Rack; 20. Miniature Air Pump; 21. Filter Box; 22. Collection Pipe; 23. Connecting Pipe; 24. Air Jet Pipe. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0021] Example 1 Please see Figures 1-5 The rust removal and painting device for underground pipelines proposed in this invention is mainly used for rust removal and painting of the outer surface of rusted steel pipes. Specifically, it includes two supports, each including a base 1. Columns 2 are installed on both sides of the upper end of the base 1. The upper ends of the two columns 2 are fixedly connected by a top plate 3. Two lower support rollers 4 are installed on the upper end of the base 1, located between the two columns 2. Driven by an X-axis moving component inside the base 1, the two lower support rollers 4 can move horizontally along the X-axis relative to the centerline of the base 1, thereby adjusting the distance between the two lower support rollers 4. An upper pressure roller 5 is positioned directly above the gap between the two lower support rollers 4. On the lifting plate 6, the lifting plate 6 is slidably set between two columns 2 and its height is adjusted by the Z-axis moving component inside the columns 2. By adjusting the distance between the two lower support rollers 4, pipes of various sizes can be placed. Then, the height of the upper pressure roller 5 is adjusted to roll the upper surface of the pipe. The outer surface of the pipe is in rolling connection with the lower support roller 4 and the upper pressure roller 5. The lower support roller 4 and the upper pressure roller 5 are both rubber wheels, and one of the lower support rollers 4 can rotate actively. The drive component 15 drives one of the lower support rollers 4 to rotate, thereby driving the pipe to rotate through friction, so as to facilitate subsequent rust removal and painting operations. A horizontally adjustable hanger 10 is installed at the bottom of the top plate 3. The lower end of the hanger 10 extends downward and is equipped with a Y-axis moving component 9. A rust removal and painting component 7 is installed at the movable end of the Y-axis moving component 9. The moving path of the rust removal and painting component 7 is parallel to the axis of the pipe. By adjusting the horizontal position of the hanger 10, the Y-axis moving component 9 and the rust removal and painting component 7 move synchronously towards the side closer to the pipe until the rust removal and painting component 7 moves to the working area outside the pipe. Then, the rust removal and painting component 7 and the Y-axis moving component 9 are activated. The Y-axis moving component 9 drives the rust removal and painting component 7 to move along the axis of the pipe, thereby removing rust and painting the outer surface of the pipe during the rotation process. The Y-axis moving component 9 extends beyond both ends of the pipe, enabling it to perform rust removal and painting operations on the pipe ends between the lower support roller 4 and the upper pressure roller 5.

[0022] Specifically, such as Figure 5 As shown, the rust removal and painting assembly 7 includes a mounting base 71 installed on the movable end of the Y-axis moving assembly 9. A grinding wheel 72, a painting spray gun 73, and a waste heat recovery unit are mounted on the mounting base 71. The grinding wheel 72 is positioned in front of the moving path of the painting spray gun 73, and the waste heat recovery unit is located between the grinding wheel 72 and the painting spray gun 73. During initial operation, the mounting base 71 moves from one end of the Y-axis moving assembly 9 to the other, causing the grinding wheel 72 and the painting spray gun 73 to move synchronously from one end of the pipe to the other. During the movement, the grinding wheel 72 impacts the rotating pipe surface. During the polishing and rust removal process, the waste heat recovery unit recovers the rust removal waste and hot air. After the waste is filtered and collected, the hot air is continuously sprayed onto the surface of the rust-removed pipe to preheat the pipe before spraying. The paint spray gun 73 moves to the side of the pipe and is opposite to the pipe surface. At this time, the front end of the pipe has been polished and preheated. Then, the paint is sprayed onto the surface of the pipe through the paint spray gun 73. The preheating temperature can promote the rapid setting of the paint film surface, effectively prevent sagging, and the preheating can also expand the micropores on the pipe surface, which is conducive to paint penetration and forms a stronger mechanical bond. Furthermore, the waste heat recovery unit includes a miniature air pump 20 installed in the inner cavity of the mounting base 71. A filter box 21 is installed on the side of the mounting base 71 near the pipe, located between the polishing wheel 72 and the paint spray gun 73. A collection pipe 22 communicating with the inner cavity of the filter box 21 is installed at one end near the pipe. The other end of the inner cavity of the filter box 21 is connected to the air inlet of the miniature air pump 20 via a connecting pipe 23. A filter screen is installed at the end of the connecting pipe 23 inside the filter box 21. An air jet pipe 24 is installed at the exhaust port of the miniature air pump 20. The other end of 24 extends to the outside of the mounting base 71 and is located between the collection pipe 22 and the paint spray gun 73, and is opposite to the pipe surface. The free end of the collection pipe 22 has a flared mouth, which can quickly suck up rust removal waste and hot air. The waste enters the filter box 21, is filtered by the filter screen and deposited at the bottom of the inner cavity of the filter box 21. The hot air is transferred to the jet pipe 24 through the connecting pipe 23 and sprayed onto the surface of the pipe after rust removal to preheat the surface of the pipe. The bottom of the filter box 21 also has an outwardly opening discharge port, which facilitates the centralized treatment and discharge of waste. Furthermore, the number of filter boxes 21 and collection tubes 22 can be set to multiple and evenly distributed around the outside of the polishing wheel 72, which can collect chips and heat from multiple directions and improve collection efficiency. The air inlet of the micro air pump 20 is equipped with a distributor, which can evenly distribute the suction force of each collection tube 22. Furthermore, a housing 16 is installed on the side of the mounting base 71 near the pipe. The polishing wheel 72 is rotatably mounted on the housing 16 via a rotating shaft 17. The end of the rotating shaft 17 away from the polishing wheel 72 extends into the housing 16 and is equipped with a gear 18. A rack 19 is installed on the column 2, located below the housing 16 and parallel to the pipe. The lower end of the housing 16 has an movable hole through which the rack 19 slides. The rack 19 passes through the movable hole and meshes with the gear 18. When the Y-axis moving assembly 9 drives the mounting base 71 to move, the mounting base 71 drives the housing 16 to move synchronously, causing the gear 18 to roll along the rack 19. This allows the polishing wheel 72 to rotate during horizontal movement, improving polishing and rust removal efficiency.

[0023] It should be noted that the micro air pump 20 is a conventional micro air pump of the prior art, which can be powered by its own power supply or connected to an external power supply through a power cord. The feed end of the paint spray gun 73 is connected to the paint supply equipment through a hose, and the movement of the hose does not affect the normal operation of the device.

[0024] Example 2 It illustrates yet another embodiment of the invention based on Embodiment 1; The lower support roller 4 is mounted on the support roller seat 11. The drive assembly 15 is a motor combination structure and is mounted on the support roller seat 11, moving synchronously with the support roller seat 11. The support roller seat 11 is slidably disposed on the upper end face of the base 1. A movable groove 12 is opened inside the upper end of the base 1. The X-axis moving assembly is disposed in the movable groove 12 and includes a bidirectional lead screw 13 and a connecting plate 14. The bidirectional lead screw 13 is rotatably mounted in the movable groove 12, and one end is driven by manual or electric drive, preferably by a handwheel installed at the end of the base 1. The two ends of the bidirectional lead screw 13 have opposite thread directions, and the middle position corresponds to the center line position of the base 1. A threaded pair is provided at both ends of the lead screw 13. A connecting plate 14 is installed on the side of the two threaded pairs facing the opening of the movable groove 12. The other end of the connecting plate 14 extends to the outside of the movable groove 12 and is fixedly connected to the side of the roller seat 11. When the bidirectional lead screw 13 rotates, the two roller seats 11 can move towards or away from each other along the X-axis, thereby adjusting the distance between the two lower rollers 4 and keeping the distance between the two lower rollers 4 and the center line of the base 1 equal. This ensures that the pipe is always directly below the upper pressure roller 5, so as to center the pipe, facilitate subsequent rolling stability, and prevent radial runout of the pipe. The opening of the movable groove 12 is located on the front and / or back of the base 1, rather than on the upper surface of the base 1, which can prevent waste from falling into the movable groove 12 during the polishing and rust removal process, thereby ensuring the normal operation of the X-axis moving assembly.

[0025] Example 3 It illustrates yet another embodiment of the invention based on Embodiment 1; The Z-axis moving assembly is preferably a handwheel-driven lead screw assembly. The inner sides of the two columns 2 are provided with longitudinal sliding grooves that communicate with their inner cavities. The two ends of the lifting plate 6 are respectively slidably assembled with the adjacent longitudinal sliding grooves. The Z-axis moving assembly is installed in one of the columns 2, and the movable end of the Z-axis moving assembly is fixedly connected to the end of the lifting plate 6. By rotating the handwheel at the top of the column 2, the height of the lifting plate 6 can be adjusted. Utilizing the thread self-locking characteristic of the lead screw, the stable rolling action of the lifting plate 6 can also be maintained, effectively preventing radial runout of the pipeline during rotation.

[0026] Example 4 It illustrates yet another embodiment of the invention based on Embodiment 1; The bottom of the top plate 3 is provided with a horizontal sliding groove that communicates with its inner cavity. The inside of the top plate 3 is equipped with a screw structure driven by a handwheel. The upper end of the hanger 10 is connected to the movable end of the screw structure, and the lower end of the hanger 10 passes through the horizontal sliding groove and extends downward. The hanger 10 is slidably connected to the inner wall of the horizontal sliding groove. By rotating the handwheel, the screw structure is driven to run, and the horizontal position of the hanger 10 is adjusted so as to adjust the horizontal position of the rust removal and painting component 7 according to the pipe of different sizes, thereby facilitating subsequent rust removal and painting operations. The lifting plate 6 has a longitudinal through hole, which is set along the X-axis and matches the stroke of the boom 10. The lower end of the boom 10 slides through the through hole to facilitate horizontal movement of the boom 10.

[0027] Example 5 It illustrates yet another embodiment of the present invention based on Embodiment 2; like Figure 2 As shown, a protective cover 8 is installed on the upper end of the roller seat 11 near the bottom of the rust removal and painting component 7. The protective cover 8 covers the drive component 15 and serves to protect it, preventing waste and paint from dripping onto it and making it difficult to clean.

[0028] Example 6 It illustrates yet another embodiment of the invention based on Embodiment 1; It also includes a movable base, and the drive component 15 is preferably a motor and a transmission structure. The motor is mounted on the movable base, and the transmission structure is a chain drive structure. Multiple of these devices are fixedly connected side by side, and a sprocket is installed on the axle of one of the lower support rollers 4 of each device. Multiple sprockets are connected by chain drive. The motor drives one of the axles to rotate, so that the lower support rollers 4 on multiple devices can run synchronously, thereby realizing the batch processing of multiple pipes of the same size.

[0029] The working process of the device of this invention is an automated continuous process integrating positioning, driving, rust removal, recycling, preheating, and spraying. Its core working principle is as follows: The operator adjusts the distance between the two lower support rollers according to the diameter of the pipe to be processed by driving the X-axis moving component, so that the pipe can be placed stably on it and the pipe axis is located in the center of the device. Then, the Z-axis moving component is driven to make the lifting plate drive the upper pressure roller to descend until it is pressed against the top of the pipe. The lower support roller provides support, and the upper pressure roller applies downward pressure. The three of them form a stable "three-point" rolling clamping mechanism. This structure can effectively limit the radial runout of the pipe during rotation and provide a stable foundation for subsequent precision operations. One of the lower support rollers is actively driven to rotate by the drive assembly. Relying on the friction between the rubber support roller and the pipe surface, the entire pipe rotates at a constant speed around its own axis. By adjusting the horizontal position of the hanger on the top plate, the entire rust removal and painting assembly is brought close to the pipe until the polishing wheel reaches a suitable working distance from the pipe surface. Then, the Y-axis moving assembly is activated to drive the rust removal and painting assembly to move at a constant speed along the pipe axis. At the same time, the polishing wheel is passively rotated during the movement through the gear-rack mechanism to perform comprehensive polishing and rust removal on the outer surface of the rotating pipe. During the rust removal process, the waste heat recovery unit operates simultaneously. A micro air pump starts, generating negative pressure through a collection pipe with a flared opening. This draws in metal waste generated during rust removal along with hot air produced by friction. The mixed gas enters the filter box, where the waste waste is intercepted by the internal filter screen and deposited at the bottom. The purified hot air is then sent to the jet pipe by the micro air pump through a connecting pipe. The jet pipe continuously blows this hot air onto the surface of the pipe that has just been rust-removed but has not yet been painted. This process achieves two main functions: Waste recycling: Keep the work surface clean to avoid environmental pollution and affecting the quality of the paint film; Surface preheating: The surface of the pipe is preheated using waste heat from friction. Preheating can accelerate the curing and shaping of the subsequent paint film, prevent paint sagging, and at the same time, the heat energy causes the micropores on the surface of the pipe to expand, which is conducive to paint penetration and enhances the adhesion and mechanical bonding strength of the paint film. Following the preheating area, the paint spray gun, driven by the mounting base, evenly sprays paint onto the clean, warm surface that has undergone rust removal and preheating. Because the process is continuous and without intermediate intervals, secondary contamination of the surface is avoided, ensuring the quality of the paint application. Moreover, the travel of the Y-axis moving component is designed to extend beyond both ends of the pipe, thus allowing for complete rust removal and painting of the pipe ends without any blind spots.

[0030] In summary, this invention ensures stable pipeline operation through a three-point clamping structure, and the integrated components enable continuous operations of rust removal, recycling, preheating, and painting with smooth process connections. The waste heat recovery design is energy-saving, environmentally friendly, and improves paint film quality. The multi-dimensional adjustment structure adapts to pipelines of different diameters, making it highly versatile. The linkage of multiple devices enables batch processing, significantly improving efficiency. The overall automation level is high, reducing labor intensity and solving many pain points of traditional maintenance. It is suitable for pipeline maintenance operations in harsh environments such as underground mines.

[0031] 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. A rust removal and painting device for underground pipelines, comprising symmetrically arranged supports, the supports including a base (1), columns (2) fixed on the base (1), and a top plate (3) connecting the tops of the two columns (2), characterized in that: The base (1) is provided with two lower support rollers (4) that can move horizontally towards or away from each other along the X-axis. An upper pressure roller (5) is provided directly above the two lower support rollers (4). The upper pressure roller (5) is installed on the lifting plate (6). The lifting plate (6) is driven by the Z-axis moving component provided in the column (2) to move up and down along the Z-axis. The bottom of the top plate (3) is provided with a horizontally movable rod (10), the lower end of the rod (10) is connected to a Y-axis moving assembly (9), and the movable end of the Y-axis moving assembly (9) is equipped with a rust removal and painting assembly (7). The rust removal and painting assembly (7) includes a mounting base (71), and a polishing wheel (72), a waste heat recovery unit, and a painting spray gun (73) arranged sequentially on the mounting base (71) along the Y-axis moving direction.

2. The downhole pipeline rust removal and painting device according to claim 1, characterized in that: The waste heat recovery unit includes a micro air pump (20), a filter box (21), and an air jet pipe (24). The filter box (21) is mounted on the mounting base (71) and located between the polishing wheel (72) and the paint spray gun (73). At least one collection pipe (22) is connected to one side of the filter box near the pipe, and the other side of the filter box is connected to the air inlet of the micro air pump (20) through the connecting pipe (23). The exhaust port of the micro air pump (20) is connected to the jet pipe (24), and the outlet of the jet pipe (24) is set facing the pipe surface.

3. The downhole pipeline rust removal and painting device according to claim 2, characterized in that: The inlet end of the collection tube (22) is provided with a flared mouth, and the bottom of the filter box (21) is provided with an openable and closable discharge port.

4. The downhole pipeline rust removal and painting device according to claim 2, characterized in that: The number of collection tubes (22) and filter boxes (21) is multiple, and they are evenly distributed circumferentially on the outside of the polishing wheel (72).

5. The downhole pipeline rust removal and painting device according to claim 1, characterized in that: The mounting base (71) has a box (16) installed on the side near the pipe. The polishing wheel (72) is rotatably mounted on the box (16) via a rotating shaft (17). A gear (18) is fixed on the rotating shaft (17). A rack (19) parallel to the pipe axis is fixed on the device, and the gear (18) meshes with the rack (19) for transmission.

6. The downhole pipeline rust removal and painting device according to claim 1, characterized in that: The base (1) is equipped with an X-axis moving assembly for driving the lower support roller (4) to move. The X-axis moving assembly includes a bidirectional lead screw (13) rotatably disposed in the movable groove (12) inside the base (1), and two connecting plates (14) threaded to both ends of the bidirectional lead screw (13). The bottom of the lower support roller (4) is equipped with a support roller seat (11), which is slidably disposed on the upper end surface of the base (1). One end of the connecting plate (14) extends to the outside of the movable groove (12) and is fixed to the side of the support roller seat (11).

7. The downhole pipeline rust removal and painting device according to claim 1, characterized in that: The Z-axis moving component is a lead screw and nut mechanism, with the lead screw driven by a handwheel and the nut connected to the lifting plate (6).

8. The downhole pipeline rust removal and painting device according to claim 1, characterized in that: The boom (10) is connected to a horizontal drive mechanism located inside the top plate (3), which is a lead screw and nut mechanism or a linear motor.

9. The downhole pipeline rust removal and painting device according to claim 1, characterized in that: At least one of the lower support rollers (4) is a drive roller, driven to rotate by a fixed drive assembly (15), and both the lower support roller (4) and the upper pressure roller (5) are rubber wheels.

10. The downhole pipeline rust removal and painting device according to any one of claims 1-9, characterized in that: Multiple devices can be arranged side by side, and the active lower support rollers (4) of each device are linked together by chain drive or synchronous belt drive mechanism.

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