A crosslinked polyethylene anticorrosion pipe coating processing device

Abstract

This invention discloses a cross-linked polyethylene anti-corrosion pipe coating processing device, belonging to the technical field of anti-corrosion pipe processing equipment. It includes a worktable with vertical plates on both sides of its top. A connecting frame is connected to a groove on the vertical plate, and a support roller is installed outside the connecting frame. A mounting frame is slidably connected to a top slide rail of the worktable, and a vertical plate is slidably connected to the mounting frame. A grinding disc is installed on the top of the vertical plate. A fixed frame is installed outside the vertical plate, and a heating plate is installed inside the fixed frame. An adjustment component is installed inside the vertical plate, and a synchronous linkage component that drives the grinding disc and heating plate to move is installed inside the mounting frame. Simultaneously, an arc adjustment component for the heating plate is installed inside the fixed frame. This cross-linked polyethylene anti-corrosion pipe coating processing device achieves uniform preheating and grinding activation treatment of the pipe's outer surface in the entire circumference through rapid centering adjustment, radial coordinated feeding of the grinding disc and heating plate, and adaptive matching of the heating plate's arc, thereby improving the quality of subsequent coating processing.

Description

Technical Field

[0001] This invention relates to the field of anti-corrosion pipe processing equipment, specifically to a cross-linked polyethylene anti-corrosion pipe coating processing device. Background Technology

[0002] Cross-linked polyethylene (XLPE) anti-corrosion pipes are widely used in petroleum, natural gas, and chemical fluid transportation due to their excellent corrosion resistance, heat resistance, and mechanical strength. During the processing of XLPE anti-corrosion pipes, an XLPE anti-corrosion coating needs to be applied to the outer surface of the metal pipe to form a dense anti-corrosion barrier, effectively blocking corrosive media from eroding the pipe body. During storage, transportation, and initial processing, a dense oxide layer naturally forms on the outer surface of the metal pipe. This oxide layer has low surface energy and insufficient interfacial bonding with the subsequently applied XLPE coating material. If the coating is applied directly to this oxide layer, even with precise control of the coating process parameters, it is difficult to form a strong chemical bond and mechanical anchor between the coating and the pipe substrate. This leads to easy peeling, blistering, or even large-area detachment of the coating during service, seriously affecting the service life and safety of the anti-corrosion pipe.

[0003] To address the aforementioned deficiencies, existing technology (Chinese patent CN213730802U, published on July 20, 2021) discloses an anti-corrosion pipe coating processing device. This device, through a cleaning unit, can remove impurities adhering to the outer wall of the pipe. The positioning surface on the baffle improves the positioning accuracy of the pipe relative to the grinding wheel, thereby enhancing processing quality. By installing the baffle and cleaning unit onto a rocker plate, the baffle and cleaning unit remain relatively stationary with the grinding wheel, ensuring the stability and accuracy of the baffle's positioning position and the cleaning unit's cleaning position, thus improving the working quality of this anti-corrosion pipe coating processing device. The solution primarily uses a guide unit, rocker plate, and grinding unit to process the coating at the end of the anti-corrosion pipe. However, it is mainly used for finishing the already coated anti-corrosion coating, rather than for activating the pipe surface before coating. The prior art (Chinese patent publication number CN121179290A, publication date 2025.12.23) discloses a grinding device for repairing anti-corrosion coatings on the surface of anti-corrosion pipelines. It uses a hydraulic rod to push a moving frame away from the first motor, with the first support rod as the stress point. This moving frame then moves the first limiting frame towards the second limiting frame, pushing the second support rod outward to support the pipe fitting. The first motor then uses a pulley to drive a transmission rod to adjust the angle of the pipe fitting. This ensures a more stable and uniform grinding process, helps to completely remove the old anti-corrosion coating, ensures uniform adhesion of the new coating, improves the anti-corrosion effect, and reduces the complexity and difficulty of operation. This solution mainly removes the old coating through a pipe rotation component and a grinding component, and also falls under the field of coating repair, but it cannot solve the problem of the oxide layer on the substrate surface before new coating.

[0004] During use, the above-mentioned solution makes it difficult to achieve uniformity and consistency in the surface treatment of the pipes through fixed grinding contact. At the same time, when the pipe diameter changes, the contact force between the treatment unit and the pipe cannot be precisely controlled, which can easily lead to over-treatment or under-treatment of the pipe surface. Summary of the Invention

[0005] The purpose of this invention is to provide a cross-linked polyethylene anticorrosion pipe coating processing device to solve the problems mentioned in the background art. The existing anticorrosion pipe coating processing devices, through fixed grinding contact, make it difficult to achieve uniformity and consistency control of the surface treatment degree of the pipe. At the same time, when the pipe diameter changes, the contact force between the processing unit and the pipe cannot be precisely controlled, which easily leads to over-treatment or under-treatment of the pipe surface.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cross-linked polyethylene anticorrosion pipe coating processing device, comprising a worktable, upright plates provided on both sides of the top of the worktable, a sliding groove provided on the upright plate, a connecting frame slidably connected in the sliding groove, a support roller for bearing and rotating provided outside the connecting frame, a load-bearing roller connected to the middle of the worktable via a cylinder, and a sliding rail symmetrically provided on the front and rear sides of the top of the worktable, a mounting frame slidably connected in the sliding rail, a vertical plate slidably connected on the mounting frame, and a grinding disc conforming to the surface of the anticorrosion pipe provided on the top of the vertical plate; A fixed frame is symmetrically installed on the outside of the vertical plate. An arc-shaped heating plate is installed on the inside of the fixed frame, and the heating plate faces the surface of the anti-corrosion pipe. An adjustment component for adjusting the position of the support roller is provided inside the vertical plate. A rotating rod is rotatably connected to the front and rear sides of the vertical plate. The outside of the mounting frame is slidably connected to the outside of the rotating rod. A synchronous linkage component for driving the grinding disc and the heating plate to move is provided inside the mounting frame. At the same time, an arc adjustment component for the heating plate is provided inside the fixed frame.

[0007] Furthermore, a circular opening is reserved in the middle of the upright plate, the connecting frame on the upright plate is set as an "L" shaped structure, and a drive motor for the support roller is installed on the connecting frame, and a controller is set on the front side of the worktable.

[0008] Furthermore, the adjustment assembly includes a bevel gear ring rotatably connected inside the vertical plate, and the bevel gear ring meshes with a first driven bevel gear. The first driven bevel gear is rotatably connected inside the vertical plate at equal angles. A first screw is integrally mounted on the shaft of the first driven bevel gear, and the first screw is rotatably connected in a slide groove. A connecting frame is threadedly connected to the outer side of the first screw.

[0009] Furthermore, the inner wall of the bevel ring is equipped with protruding teeth at equal angles, and the protruding teeth are meshed with the drive gear. The drive gear is rotatably connected to the bottom inner side of the vertical plate, and the shaft of the drive gear is connected to the motor on the outer side of the vertical plate.

[0010] Furthermore, the synchronous linkage component includes a rotating rod, and the end of the rotating rod is connected to the drive gear shaft via a sprocket mechanism. A protrusion is installed on the outside of the rotating rod, and the protrusion is fitted into a groove. The groove is formed on the inner wall of the bevel gear cylinder, and the bevel gear cylinder is rotatably connected to the outside of the mounting frame. The bevel gear cylinder is meshed with a second driven bevel gear, and the second driven bevel gear is rotatably connected to the outside of the mounting frame. A second screw is integrally connected to the shaft of the second driven bevel gear, and the second screw is rotatably connected to the inside of the mounting frame. The bottom of the vertical plate is threadedly connected to the second screw.

[0011] Furthermore, the rotating rod drives the bevel gear cylinder to rotate synchronously through the convex ribs and grooves. The bevel gear cylinder can slide horizontally outside the rotating rod. The vertical plate drives the grinding disc and heating plate to adjust the distance between them and the anti-corrosion pipe synchronously through the second screw.

[0012] Furthermore, a motor for driving the grinding disc is installed on the vertical plate, and a pre-tensioning spring is provided on the inner side of the grinding disc. The grinding disc presses against the surface of the anti-corrosion pipe, and the heating plate is close to but does not contact the surface of the anti-corrosion pipe. The heating elements on the heating plate are evenly distributed and the heating plate is made of flexible material.

[0013] Furthermore, the curvature adjustment component includes a reverse lead screw rotatably connected inside the fixed frame, and a slider is symmetrically threaded onto the reverse lead screw. A connecting rod is hinged to the outside of the slider, and the connecting rod is hinged to the end edge of the heating plate.

[0014] Furthermore, the heating plate is configured with an arc adjustment structure through a slider, a reverse lead screw, and a connecting rod. The middle part of the heating plate is fixedly connected to the outside of the fixed frame, and the arc adjustment of the heating plate is adjusted synchronously with the specifications of the anti-corrosion pipe.

[0015] Furthermore, a pull rope is wound around the middle of the reverse lead screw, and the bottom of the pull rope is fixedly connected to the inner wall of the mounting frame. Torsion springs are installed on both sides of the reverse lead screw, and the reverse lead screw forms a rotating structure through the torsion springs and the pull rope.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This cross-linked polyethylene anticorrosion pipe coating processing device, during use, achieves uniform preheating and grinding activation treatment of the pipe's outer surface in the entire circumference through rapid centering adjustment, radial coordinated feeding of the linkage grinding disc and heating plate, and adaptive matching of the heating plate's curvature, thereby improving the quality of subsequent coating processing.

[0017] 1. Furthermore, by setting a heating plate on the upstream side of the grinding disc, the surface of the pipe is preheated before the grinding and activation treatment. This causes micro-cracks to form on the oxide layer of the pipe surface due to thermal stress, reducing the difficulty of grinding and activation. At the same time, the preheating enhances the surface activity of the pipe substrate. The grinding disc then performs micro-cutting on the preheated surface, effectively removing the oxide layer and forming a uniform micro-rough surface. The synergistic effect of preheating and grinding, compared with simple mechanical grinding, can more thoroughly remove the oxide layer, thereby significantly improving the bonding strength between the subsequent cross-linked polyethylene anti-corrosion coating and the pipe substrate, effectively preventing the coating from peeling or blistering during use.

[0018] 2. Furthermore, the shaft of the drive gear drives the rotating rod to rotate simultaneously via a sprocket mechanism. The rotating rod drives the bevel gear cylinder through the convex ribs and grooves, and then drives the vertical plate to slide through the second driven bevel gear and the second screw. This achieves synchronous radial advance and retreat of the grinding disc and the heating plate. This mechanical linkage structure ensures that the radial positional relationship between the grinding disc and the heating plate always maintains a fixed ratio, avoiding control errors and action delays that may be caused by using independent drive elements. It ensures precise matching of the timing and spacing between the preheating process and the grinding process, effectively improving the uniformity and consistency of the pipe surface activation treatment.

[0019] 3. Furthermore, when the mounting frame moves the vertical plate toward the pipe, the pull rope is tightened and drives the reverse screw to rotate. Through the slider and connecting rod, the end edge of the heating plate is pushed and pulled, so that the curvature of the heating plate is automatically adjusted according to the change of the pipe diameter. This curvature adjustment action is linked with the feeding action of the vertical plate. Without the need for an additional power source and independent control, the inner surface of the heating plate can always maintain a uniform heating distance with the outer surface of pipes of different diameters, ensuring the stability and uniformity of the preheating effect and significantly expanding the application range of the device.

[0020] 4. Furthermore, an adjustment component is installed inside the vertical plate, which allows the connecting frame and support rollers to move synchronously centripetally or centrifugally along the slide. Multiple support rollers are adjusted synchronously, ensuring that the pipe axis remains centered throughout the adjustment process. This enables rapid and precise centering support for pipes of different diameters. At the same time, the support rollers and the pipes are in rolling contact and work with the drive motor to provide rotational power, which ensures the smoothness of pipe rotation and avoids scratches on the pipe surface, thus improving processing quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall front view of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a schematic diagram showing the distribution structure of the upright plate, mounting frame, vertical plate, fixing frame, and heating plate of the present invention. Figure 4 This is a schematic diagram of the front section structure of the vertical plate of the present invention; Figure 5 This is a schematic diagram of the distribution structure of the bevel gear ring, the first driven bevel gear, the connecting frame, and the support roller of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram showing the distribution structure of the rotating rod, mounting frame, vertical plate, grinding disc, fixing frame, and heating plate of the present invention. Figure 8 This is a schematic diagram of the connection structure of the rotating rod, bevel gear cylinder, second driven bevel gear, and second screw of the present invention; Figure 9 This is a half-section exploded view of the connection between the rotating rod and the bevel gear cylinder of the present invention; Figure 10 For the present invention Figure 9 Enlarged structural diagram at point B; Figure 11 This is a schematic diagram of the structure of the fixed frame, reverse lead screw, slider, connecting rod and heating plate of the present invention; Figure 12 This is a schematic diagram of the internal cross-sectional structure of the fixing frame of the present invention; Figure 13 This is a schematic diagram of the coating processing apparatus assembly of the present invention.

[0022] In the diagram: 1. Workbench; 2. Vertical plate; 3. Slide groove; 4. Connecting frame; 5. Support roller; 6. Mounting frame; 7. Vertical plate; 8. Grinding disc; 9. Fixing frame; 10. Heating plate; 11. Bevel gear ring; 12. First driven bevel gear; 13. First screw; 14. Drive gear; 15. Convex tooth; 16. Bevel gear cylinder; 17. Second driven bevel gear; 18. Second screw; 19. Rotating rod; 20. Protrusion; 21. Groove; 22. Reverse lead screw; 23. Slider; 24. Connecting rod; 25. Torsion spring; 26. Pull rope; 27. Load-bearing roller. Detailed Implementation

[0023] 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.

[0024] Example 1: Please refer to Figures 1-12 The present invention provides the following technical solution: a cross-linked polyethylene anti-corrosion pipe coating processing device, comprising a workbench 1, upright plates 2 on both sides of the top of the workbench 1, a sliding groove 3 on the upright plate 2, a connecting frame 4 slidably connected in the sliding groove 3, a support roller 5 for bearing and rotating on the outside of the connecting frame 4, a load-bearing roller 27 connected to the middle of the workbench 1 by a cylinder, and symmetrical slide rails on the front and rear sides of the top of the workbench 1, a mounting frame 6 slidably connected in the slide rails, a vertical plate 7 slidably connected on the mounting frame 6, and an anti-corrosion coating on the top of the vertical plate 7. A grinding disc 8 is mounted on the surface of the pipe. A fixed frame 9 is symmetrically installed on the outside of the vertical plate 7. An arc-shaped heating plate 10 is installed on the inside of the fixed frame 9, and the heating plate 10 faces the surface of the anti-corrosion pipe. An adjustment component for adjusting the position of the support roller 5 is provided inside the vertical plate 2. A rotating rod 19 is rotatably connected to the front and rear sides of the vertical plate 2. The outside of the mounting frame 6 is slidably connected to the outside of the rotating rod 19. A synchronous linkage component for driving the grinding disc 8 and the heating plate 10 to move is provided inside the mounting frame 6. At the same time, an arc adjustment component for the heating plate 10 is provided inside the fixed frame 9.

[0025] The core working principle of the solution is as follows: the support roller 5 drives the anti-corrosion pipe to rotate at a uniform speed, while the mounting frame 6 slides back and forth along the pipe axis, driving the grinding disc 8 and the heating plate 10 to move synchronously along the pipe surface. This achieves a continuous processing process of preheating and then grinding the outer surface of the pipe. The device uses an adjustment component to allow the support roller 5 to adapt to different pipe diameters, a synchronous linkage component to achieve radial coordinated feeding of the grinding disc 8 and the heating plate 10, and an arc adjustment component to achieve adaptive matching of the arc of the heating plate 10 to the pipe diameter, thereby preheating the pipe surface before coating. The outer surface of the material undergoes uniform and controllable activation treatment, effectively removing the oxide layer and forming a micro-rough surface suitable for coating adhesion. All action mechanisms originate from the same power source, driving the motor of gear 14. Through the organic combination of various transmission methods such as sprocket transmission, bevel gear meshing, screw transmission, and sliding transmission of convex ribs 20 and grooves 21, the mechanical linkage and collaborative work of each functional module are realized. The structure is compact and easy to control, effectively ensuring the uniformity and consistency of the activation treatment of the pipe surface, and providing an ideal substrate surface state for the subsequent firm coating of cross-linked polyethylene anti-corrosion coating.

[0026] A circular opening is reserved in the middle of the upright plate 2. The connecting frame 4 on the upright plate 2 is set as an "L" shaped structure, and the drive motor of the support roller 5 is installed on the connecting frame 4. A controller is set on the front side of the worktable 1.

[0027] refer to Figures 1-6 As shown, the anti-corrosion pipe to be processed is placed horizontally at the circular opening between the two sets of vertical plates 2. The load-bearing roller 27 bears the weight of the anti-corrosion pipe, reducing the stress on the support roller 5. The height of the load-bearing roller 27 can be adjusted as needed by a cylinder. The outer surface of the pipe is centered and rolled by the support rollers 5 installed on the two vertical plates 2. A drive motor is installed on the connecting frame 4. The motor drives the support roller 5 to rotate around its own axis. The friction between the support roller 5 and the outer surface of the pipe drives the pipe to rotate at a constant speed around its own axis. The controller on the front of the worktable 1 is used to control the speed and start / stop of the drive motor, thereby adjusting the rotation speed of the pipe to meet the needs of different specifications of pipes and different processing techniques. Later, a drive source can also be added to the load-bearing roller 27 to drive the pipe to rotate.

[0028] The adjustment assembly includes a bevel ring 11 rotatably connected inside the vertical plate 2, and the bevel ring 11 meshes with a first driven bevel tooth 12. The first driven bevel tooth 12 is rotatably connected inside the vertical plate 2 at equal angles. A first screw 13 is integrally mounted on the shaft of the first driven bevel tooth 12, and the first screw 13 is rotatably connected in the slide groove 3. A connecting bracket 4 is threaded to the outer side of the first screw 13. Protruding teeth 15 are installed at equal angles on the inner wall of the bevel ring 11, and the protruding teeth 15 mesh with a drive gear 14. The drive gear 14 is rotatably connected to the inner bottom of the vertical plate 2, and the shaft of the drive gear 14 is connected to a motor on the outer side of the vertical plate 2.

[0029] refer to Figures 4-6 As shown, when processing pipes of different diameters, the position of the support roller 5 needs to be adjusted. This adjustment process is completed by the adjustment component. The drive gear 14 on the bottom inner side of the vertical plate 2 meshes with the convex teeth 15 on the inner wall of the bevel ring 11. The drive gear 14 is driven by the motor on the outer side of the vertical plate 2. When the motor starts, the drive gear 14 drives the bevel ring 11 to rotate through the convex teeth 15. The bevel ring 11 simultaneously drives multiple first driven bevel teeth 12 to rotate synchronously, thereby causing each first screw 13 to rotate synchronously, driving each connecting frame 4 to move synchronously in the slide groove 3 towards the center or centrifugally, thereby driving all support rollers 5 to move synchronously closer to or away from the pipe axis, realizing fast and accurate centering support for pipes of different diameters.

[0030] The synchronous linkage component includes a rotating rod 19, the end of which is connected to the shaft of the drive gear 14 via a sprocket mechanism. A protrusion 20 is mounted on the outside of the rotating rod 19, engaging with a groove 21. The groove 21 is formed on the inner wall of the bevel gear cylinder 16, which is rotatably connected to the outside of the mounting frame 6. The bevel gear cylinder 16 meshes with a second driven bevel gear 17, which is also rotatably connected to the outside of the mounting frame 6. A second screw 18 is integrally connected to the shaft of the second driven bevel gear 17, which is rotatably connected to the inside of the mounting frame 6. The bottom of plate 7 is threadedly connected to the second screw 18. The rotating rod 19 drives the bevel gear cylinder 16 to rotate synchronously through the protrusion 20 and the groove 21. The bevel gear cylinder 16 can slide horizontally outside the rotating rod 19. The vertical plate 7 drives the grinding disc 8 and the heating plate 10 to adjust the distance between them and the anti-corrosion pipe synchronously through the second screw 18. The vertical plate 7 is equipped with a motor that drives the grinding disc 8. A pre-tightening spring is provided on the inner side of the grinding disc 8. The grinding disc 8 is pressed against the surface of the anti-corrosion pipe. The heating plate 10 is close to but does not contact the surface of the anti-corrosion pipe. The heating elements on the heating plate 10 are evenly distributed and the heating plate 10 is made of flexible material.

[0031] refer to Figures 2-4 and Figures 7-10As shown, the pre-coating surface activation treatment requires the grinding disc 8 and heating plate 10 to reciprocate along the axial direction of the pipe, simultaneously preheating and grinding the pipe surface. This feeding motion is achieved by a synchronous linkage assembly. When the drive gear 14 rotates, it drives the rotating rod 19 to rotate synchronously through the sprocket mechanism. The rotating rod 19 has a protrusion 20 on its outside, which engages with the groove 21 on the inner wall of the bevel gear cylinder 16. The bevel gear cylinder 16 is rotatably connected to the outside of the mounting frame 6. The rotating rod 19 drives the bevel gear cylinder 16 to rotate synchronously through the protrusion 20 and the groove 21. The bevel gear cylinder 16 can slide horizontally outside the rotating rod 19 to adapt to the positional changes of the mounting frame 6 as it reciprocates along the slide rail. When the bevel gear cylinder 16 rotates, it drives the second screw 18 to rotate through the second driven bevel gear 17. The second screw 18 drives the vertical plate 7 to rotate in the mounting frame 6. The mounting frame 6 slides on the vertical plate 7, thereby driving the grinding disc 8 on the top of the vertical plate 7 and the heating plate 10 on the inner side of the fixed frame 9 to move synchronously towards or away from the pipe surface, adapting to anti-corrosion pipes of different diameters. At the same time, the mounting frame 6 slides back and forth along the pipe axis in the slide rail. Its sliding action can be driven by a separate drive mechanism, such as a lead screw or cylinder. Since the bevel gear cylinder 16 and the rotating rod 19 maintain rotational transmission through the convex rib 20 and the groove 21, when the mounting frame 6 slides axially, the bevel gear cylinder 16 can slide freely along the rotating rod 19, thus ensuring power transmission without interfering with the axial feed movement of the mounting frame 6. Therefore, the grinding disc 8 and the heating plate 10 can move radially with the vertical plate 7 to adapt to the pipe surface of different diameters, and can also move axially with the mounting frame 6 to achieve processing of the entire length of the pipe.

[0032] The curvature adjustment assembly includes a reverse lead screw 22 rotatably connected inside the fixed frame 9, and a slider 23 symmetrically threaded on the reverse lead screw 22. A connecting rod 24 is hinged to the outside of the slider 23, and the outside of the connecting rod 24 is hinged to the end edge of the heating plate 10. The heating plate 10 forms a curvature adjustment structure through the slider 23, the reverse lead screw 22 and the connecting rod 24. The middle part of the heating plate 10 is fixedly connected to the outside of the fixed frame 9, and the curvature adjustment of the heating plate 10 is adjusted synchronously with the specifications of the anti-corrosion pipe. A pull rope 26 is wound around the middle part of the reverse lead screw 22, and the bottom of the pull rope 26 is fixedly connected to the inner wall of the mounting frame 6. Torsion springs 25 are installed on the outside of both sides of the reverse lead screw 22. The reverse lead screw 22 forms a rotation structure through the torsion springs 25 and the pull rope 26.

[0033] refer to Figures 8-9 and Figures 11-12As shown, during the processing, the heating plate 10 first preheats the surface of the pipe. The heating plate 10 is made of flexible material and has heating elements evenly distributed inside. The heating plate 10 faces the surface of the pipe but is close to it without contacting it. It preheats the surface of the pipe to a set temperature through thermal radiation, causing micro-cracks to form in the oxide layer on the surface of the pipe due to thermal stress, reducing the difficulty of subsequent grinding and activation. Immediately afterwards, the grinding disc 8, located downstream of the heating plate 10 along the axial direction, rotates at high speed under the drive of a motor. The inner side of the grinding disc 8 is provided with pre-tensioning... A spring causes the grinding disc 8 to press against the pipe surface with elastic preload, performing micro-cutting on the preheated pipe surface. This effectively removes the oxide layer and forms a uniform micro-rough surface. The vertical plate 7, via the second screw 18, synchronously moves the grinding disc 8 and the heating plate 10, ensuring that both maintain a fixed contact and non-contact state with the pipe surface. This ensures that the processing parameters for the preheating and grinding processes are synchronized, avoiding process mismatch problems caused by separate adjustments. For pipes of different diameters, the heating plate 10 needs to be adapted to different pipe diameters. To ensure uniform preheating, the curvature of the material is adjusted. The working principle of the curvature adjustment component is as follows: When the mounting frame 6 moves along the slide rail towards the pipe, that is, when the vertical plate 7 drives the grinding disc 8 and the heating plate 10 closer to the pipe, the pull rope 26 is tightened, causing the reverse screw 22 to rotate against the torque of the torsion spring 25. When the reverse screw 22 rotates, the two sliders 23 on it move symmetrically along the axis of the reverse screw 22, pushing and pulling the end edge of the heating plate 10 through the connecting rod 24, thus changing the curvature of the heating plate 10. The curvature increases when the pipe diameter is large. When the pipe diameter is small, the curvature shrinks and narrows, ensuring that the inner curved surface of the heating plate 10 maintains a uniform distance from the outer surface of pipes of different diameters. When the mounting frame 6 moves away from the pipe, the pull rope 26 loosens, and the torsion spring 25 drives the reverse screw 22 to rotate and reset. Thus, the curvature of the heating plate 10 can be automatically adjusted synchronously with the pipe specifications without manual intervention, effectively ensuring the uniformity and consistency of the pipe surface activation treatment. This provides an ideal substrate surface condition for the subsequent firm application of the cross-linked polyethylene anti-corrosion coating. Figure 13 As shown, a coating process is performed after sanding.

[0034] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cross-linked polyethylene anticorrosion pipe coating processing device, comprising a workbench (1), wherein upright plates (2) are provided on both sides of the top of the workbench (1), a sliding groove (3) is provided on the upright plate (2), a connecting frame (4) is slidably connected in the sliding groove (3), a support roller (5) for bearing and rotating is provided outside the connecting frame (4), a load-bearing roller (27) is connected to the middle of the workbench (1) by a cylinder, and a sliding rail is symmetrically provided on the front and rear sides of the top of the workbench (1), a mounting frame (6) is slidably connected in the sliding rail, a vertical plate (7) is slidably connected on the mounting frame (6), and a grinding disc (8) that fits the surface of the anticorrosion pipe is provided on the top of the vertical plate (7); Its features are: A fixed frame (9) is symmetrically installed on the outside of the vertical plate (7). An arc-shaped heating plate (10) is installed on the inside of the fixed frame (9), and the heating plate (10) faces the surface of the anti-corrosion pipe. An adjustment component for adjusting the position of the support roller (5) is provided inside the vertical plate (2). A rotating rod (19) is rotatably connected to the front and rear sides of the vertical plate (2). The outside of the mounting frame (6) is slidably connected to the outside of the rotating rod (19). A synchronous linkage component for driving the grinding disc (8) and the heating plate (10) to move is provided inside the mounting frame (6). At the same time, an arc adjustment component for the heating plate (10) is provided inside the fixed frame (9).

2. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 1, characterized in that: The upright plate (2) has a circular opening in the middle. The connecting frame (4) on the upright plate (2) is set as an "L" shaped structure. The connecting frame (4) is equipped with a drive motor for the support roller (5). A controller is set on the front side of the workbench (1).

3. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 1, characterized in that: The adjustment assembly includes a bevel ring (11) rotatably connected inside the vertical plate (2), and the bevel ring (11) meshes with a first driven bevel tooth (12). The first driven bevel tooth (12) is rotatably connected inside the vertical plate (2) at equal angles. A first screw (13) is integrally installed on the shaft of the first driven bevel tooth (12), and the first screw (13) is rotatably connected in the slide groove (3). A connecting frame (4) is threadedly connected to the outside of the first screw (13).

4. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 3, characterized in that: The inner wall of the bevel ring (11) is equipped with protruding teeth (15) at equal angles, and the protruding teeth (15) are meshed with the drive gear (14). The drive gear (14) is rotatably connected to the bottom inner side of the vertical plate (2), and the shaft of the drive gear (14) is connected to the motor on the outside of the vertical plate (2).

5. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 1, characterized in that: The synchronous linkage component includes a rotating rod (19), and the end of the rotating rod (19) is connected to the shaft of the drive gear (14) through a sprocket mechanism. A protrusion (20) is installed on the outside of the rotating rod (19). The protrusion (20) is fitted into a groove (21). The groove (21) is opened on the inner wall of the bevel gear cylinder (16). The bevel gear cylinder (16) is rotatably connected to the outside of the mounting frame (6). The bevel gear cylinder (16) is meshed with a second driven bevel gear (17). The second driven bevel gear (17) is rotatably connected to the outside of the mounting frame (6). The shaft of the second driven bevel gear (17) is integrally connected to a second screw (18). The second screw (18) is rotatably connected to the inside of the mounting frame (6). The bottom of the vertical plate (7) is threadedly connected to the second screw (18).

6. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 5, characterized in that: The rotating rod (19) drives the bevel gear cylinder (16) to rotate synchronously through the protrusion (20) and groove (21). The bevel gear cylinder (16) can slide horizontally outside the rotating rod (19). The vertical plate (7) drives the grinding disc (8) and heating plate (10) to adjust the distance between them and the anti-corrosion pipe synchronously through the second screw (18).

7. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 5, characterized in that: The vertical plate (7) is equipped with a motor that drives the grinding disc (8). A pre-tightening spring is provided on the inner side of the grinding disc (8). The grinding disc (8) presses against the surface of the anti-corrosion pipe. The heating plate (10) is close to but does not contact the surface of the anti-corrosion pipe. The heating elements on the heating plate (10) are evenly distributed and the heating plate (10) is made of flexible material.

8. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 1, characterized in that: The arc adjustment assembly includes a reverse lead screw (22) rotatably connected inside the fixed frame (9), and a slider (23) is symmetrically threaded on the reverse lead screw (22). A connecting rod (24) is hinged to the outside of the slider (23), and the outside of the connecting rod (24) is hinged to the end edge of the heating plate (10).

9. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 8, characterized in that: The heating plate (10) forms an arc adjustment structure through a slider (23), a reverse lead screw (22) and a connecting rod (24). The middle part of the heating plate (10) is fixedly connected to the outside of the fixed frame (9), and the arc adjustment of the heating plate (10) is adjusted synchronously with the specifications of the anti-corrosion pipe.

10. The cross-linked polyethylene anti-corrosion pipe coating processing device according to claim 8, characterized in that: The middle part of the reverse lead screw (22) is wound with a pull rope (26), and the bottom of the pull rope (26) is fixedly connected to the inner wall of the mounting frame (6). Torsion springs (25) are installed on both sides of the reverse lead screw (22). The reverse lead screw (22) forms a rotating structure through the torsion springs (25) and the pull rope (26).

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