Coating composite steel pipe inner wall anticorrosion coating device

Abstract

This utility model discloses an anti-corrosion coating device for the inner wall of a plastic-coated composite steel pipe, including a processing support, on which a telescopic inner coating device is installed. The telescopic inner coating device includes a telescopic coating cylindrical block. A limiting sleeve is installed on the processing support, and the limiting sleeve is inserted into the processing support through a bearing. An angle drive motor is installed on the processing support. This utility model relates to the field of steel pipe anti-corrosion technology. It adopts a multi-stage electromagnetic telescopic structure and a rotary-spray integrated design. It can adapt to steel pipes of different diameters through the horizontal telescopic extension of the fitted annular tube, and can complete cleaning and coating in the same process, significantly shortening the operation cycle. The spider web spray pipe combined with the uniform coating technology of the rotating scraper, along with the thorough surface treatment of the extended cleaner, significantly improves the coating adhesion and the uniformity of anti-corrosion performance.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe anti-corrosion technology, specifically to an anti-corrosion coating device for the inner wall of a plastic-coated composite steel pipe. Background Technology

[0002] In the field of anti-corrosion coating of steel pipe inner walls, traditional equipment and processes suffer from key technical bottlenecks such as poor pipe diameter adaptability, separation of cleaning and coating processes, poor coating uniformity, severe mechanical wear, and low automation. Fixed structure equipment cannot adapt to steel pipes of different diameters, requiring frequent adjustments of components; the step-by-step cleaning and coating process leads to low production efficiency and is prone to secondary pollution; traditional spraying equipment causes coating cracking and blistering due to uneven spraying or improper surface treatment; mechanical drive methods are prone to component wear and high maintenance costs; and there is a strong reliance on manual operation, resulting in poor coating quality consistency. In view of these issues, this case was developed through in-depth research. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: a plastic-coated composite steel pipe inner wall anti-corrosion coating device, comprising a processing support, a telescopic inner coating device mounted on the processing support, the telescopic inner coating device comprising a telescopic coating cylindrical block, a limiting sleeve mounted on the processing support, the limiting sleeve being inserted into the processing support via bearings, an angle drive mechanism mounted on the processing support, multiple gear slots formed on the limiting sleeve, an angle gear mounted on the drive end of the angle drive mechanism, the angle gear meshing with the multiple gear slots, the telescopic coating cylindrical block being movably inserted into the inner side of the limiting sleeve, and the limiting sleeve... Multiple interlocking annular tubes are installed on the inner side, and these annular tubes are interlocked with each other. Telescopic rings are installed on the outer sides of the multiple interlocking annular tubes and the telescopic coating cylindrical block. Limiting rings are installed on the inner sides of the multiple interlocking annular tubes and the limiting sleeve. Multiple limiting telescopic shafts are installed on the paired limiting rings, and the limiting telescopic shafts are movably inserted into the telescopic rings. A circular electromagnet is installed on the limiting ring, and a circular magnet is installed on the telescopic ring. An electromagnetic expander is installed on the side wall of the interlocking annular tube, and a limiting insert block is installed on the electromagnetic expander. An extended cleaner and a sprayer are installed on the telescopic coating cylindrical block.

[0004] Preferably, the extended cleaner includes multiple arc-shaped cleaning blocks. The telescopic coated cylindrical block and the multiple arc-shaped cleaning blocks are provided with telescopic grooves. The telescopic grooves have a convex cross-section. A convex telescopic block is installed on the inner side of the telescopic groove. An angle limiting block is installed on the convex telescopic block. The angle limiting block is concave. Scissor-type brackets are installed on two pairs of angle limiting blocks. A pair of extended circular electromagnets are installed on the inner side of the telescopic groove. An extended circular magnet is installed on the convex telescopic block. A compression spring post is installed on one pair of convex telescopic blocks. A cleaning brush is installed on the arc-shaped cleaning block.

[0005] Preferably, the sprayer includes a spider web spray pipe, which is inserted into the telescopic coating cylinder block. A diversion spray pipe is installed on the spider web spray pipe, which is inserted into the telescopic coating cylinder block. A feeding valve is installed on the diversion spray pipe, and a flexible diversion pipe is installed on the feeding valve.

[0006] Preferably, a displacement sensor is installed on the inner side of the limiting sleeve.

[0007] Preferably, a vortex flow meter is installed at the inlet of the spider web spray pipe.

[0008] Preferably, the inner wall of the flexible drainage tube is coated with a Teflon coating. Beneficial effects

[0009] This utility model provides a device for anti-corrosion coating of the inner wall of plastic-coated composite steel pipes. It offers the following advantages: This device employs a multi-stage electromagnetic telescopic structure and an integrated rotary-spraying design. It can adapt to steel pipes of different diameters through the horizontal telescopic movement of the fitted annular tube, and can complete cleaning and coating in the same process, significantly shortening the work cycle. The spiderweb spray pipe combined with the rotating scraper's uniform coating technology, along with the thorough surface treatment of the extended cleaner, significantly improves coating adhesion and the uniformity of anti-corrosion performance. The electromagnetic precision drive system replaces traditional mechanical transmission, achieving not only stepless positioning and low-wear operation, but also reducing manual intervention through automated control, ensuring highly consistent coating quality. The overall solution solves the pain points of traditional equipment, such as poor pipe diameter adaptation, process separation, uneven coating, high maintenance costs, and low automation levels. It aligns with the industry trend of pipeline engineering towards high efficiency, intelligence, and environmental protection, demonstrating significant technological advancement and application value. Attached Figure Description

[0010] Figure 1 This is a front sectional view of the anti-corrosion coating device for the inner wall of the plastic-coated composite steel pipe described in this utility model.

[0011] Figure 2 for Figure 1 A magnified view of the letter "A" in the image.

[0012] In the diagram: 1. Machining bracket; 2. Limiting sleeve; 3. Angle drive mechanism; 4. Gear groove; 5. Angle gear; 6. Compression spring column; 7. Set circular tube; 8. Telescopic ring; 9. Limiting ring; 10. Circular ring electromagnet; 11. Circular ring magnet; 12. Electromagnetic expansion joint; 13. Limiting insert block; 14. Arc cleaning block; 15. Telescopic groove; 16. Convex telescopic block; 17. Angle limiting block; 18. Scissor-type bracket; 19. Extending circular ring electromagnet; 20. Extending circular ring magnet. Detailed Implementation

[0013] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Appropriate controllers and encoders should be selected according to the actual situation to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical components are connected in sequence. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, and will not describe the electrical control further. Example

[0015] Please see Figure 1-2 In the field of anti-corrosion coating of steel pipe inner walls, traditional equipment and processes have the following key technical bottlenecks: Traditional coating equipment is mostly a fixed structure, which cannot adapt to steel pipes of different diameters, resulting in low equipment versatility, requiring frequent adjustments or replacements of parts, and low efficiency; In traditional processes, the cleaning of the inner wall of the steel pipe (such as rust removal and decontamination) and anti-corrosion coating are carried out in separate steps, requiring multiple clamping of the steel pipe, resulting in low production efficiency, and incomplete cleaning can easily affect the adhesion of the coating; Traditional spraying equipment, due to uneven spraying or improper surface treatment, results in uneven coating thickness, which is prone to cracking, blistering and other problems, and unstable anti-corrosion performance; Therefore, this application protects the anti-corrosion coating device for the inner wall of the plastic-coated composite steel pipe. The angle drive motor 3 operates, driving the angle gear 5 on its drive end to rotate. The angle gear 5 drives the gear groove 4 on the limiting sleeve 2, thereby driving the upper limiting sleeve 2 to rotate. The rotating limiting sleeve 2 drives the multiple sleeved annular tubes 7 inside the device to rotate. Through the cooperation of the sleeved annular tubes, the limiting rings 9, telescopic rings 8, and the limiting telescopic shafts on the limiting sleeve 2, rotational drive and horizontal telescopic limiting effects are achieved. When the annular electromagnet 10 on the limiting ring 9 is energized, the magnetic repulsion or attraction of the annular magnet 11 on the limiting ring 9 causes the telescopic ring 8 on it to move horizontally along the limiting telescopic shafts on the paired limiting rings 9. The limiting rings 9 then drive the sleeved annular tubes 7 on them to move horizontally, thus allowing the sleeved annular tubes 7 to be inserted... The material is inserted into the inside of the steel pipe. The rotating sleeve ring tube 7 drives the outer extension cleaner. The extension ring electromagnet 19 inside the telescopic groove 15 on the sleeve ring tube 7 is energized. The extension ring electromagnet 19 magnetically repels the extension ring magnet 2011. The extension ring magnet 2011 drives the convex telescopic block 16 on it, causing the convex telescopic block 16 to extend and retract along the inside of the telescopic groove 15. The convex telescopic block 16 drives the angle limiting block 17 on it. The angle limiting block 17 drives the scissor bracket 18 on it. The extension and retraction of the scissor bracket 18 achieves the effect of extending the arc cleaning block 14. The cleaning brush on the arc cleaning block 14 rotates and cleans the inside of the steel pipe. Similarly, the material is guided to the inside of the diversion spray pipe. The material is then guided to the inside of the spider web spray pipe on the telescopic coating cylinder block, thereby spraying the inside of the steel pipe and achieving the effect of spraying and scraping. In summary, through the coordinated design of mechanical, electromagnetic, and fluid mechanics, efficient cleaning and anti-corrosion coating of the inner wall of steel pipes is achieved. Its core structure includes a processing support 1 (supporting the entire device and housing the telescopic inner coating device, limiting sleeve 2, and drive mechanism), the telescopic inner coating device (containing a telescopic cylindrical block as the core actuator), the limiting sleeve 2 (connected to the support via bearings, with gear grooves 4 on its surface and multiple layers of annular tubes fitted inside to achieve rotation and horizontal telescopic movement), and an angle drive 3 (with an angle gear 5 installed at the drive end, meshing with the gear grooves 4 of the limiting sleeve 2 to control the rotation angle). The extended cleaner is connected to the scissor bracket 18 via the arc-shaped cleaning block 14 (with a cleaning brush at the end). It works in conjunction with the extended ring electromagnet 19 in the telescopic groove 15 and the extended ring magnet 2011 on the convex telescopic block 16 to drive the cleaning block to extend and fit against the pipe wall using magnetic repulsion. The spraying system consists of a spider web spray pipe (forming a uniform spraying network) installed on the telescopic cylindrical block and a diversion spray pipe (connected to a flexible diversion pipe and controlled by a feeding valve to control the paint flow rate). In terms of operation, firstly, the annular electromagnet 10 inside the limiting sleeve 2 is energized, driving the telescopic ring 8 to adjust the insertion depth of the fitted annular tube 7 along the limiting telescopic axis to adapt to the pipe diameter; then, the angle drive motor 3 is started, driving the limiting sleeve 2 and the annular tube to rotate, while the expanding annular electromagnet 19 is energized to push the convex telescopic block 16 outward, and the scissor bracket 18 unfolds so that the arc cleaning block 14 fits against the pipe wall for rotating cleaning; after cleaning, the flexible drainage pipe delivers the anti-corrosion coating to the spider web spray pipe through the feeding valve, and the coating is evenly sprayed through the porous structure and combined with the rotating scraper to ensure uniform coating; finally, the electromagnetic power is cut off, and each telescopic component is reset and withdrawn from the steel pipe under the action of the compression spring column 6. This device achieves stepless telescopic and positioning through precise electromagnetic control, reducing mechanical wear, and adapts to different pipe diameters with a multi-stage telescopic design. It integrates cleaning and coating processes to improve efficiency and has the technical advantages of uniform coating and excellent anti-corrosion performance.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for anti-corrosion coating of the inner wall of a plastic-coated composite steel pipe, characterized in that, The system includes a processing bracket (1), on which a telescopic inner coating device is mounted. The telescopic inner coating device includes a telescopic coating cylindrical block. A limiting sleeve (2) is mounted on the processing bracket (1) and is inserted into the processing bracket (1) via a bearing. An angle drive (3) is mounted on the processing bracket (1). The limiting sleeve (2) has multiple gear slots (4). An angle gear (5) is mounted on the drive end of the angle drive (3). The angle gear (5) meshes with the multiple gear slots (4). The telescopic coating cylindrical block is movably inserted into the inner side of the limiting sleeve (2). Multiple fitted annular tubes (7) are mounted on the inner side of the limiting sleeve (2). The tubes (7) are nested together. A telescopic ring (8) is installed on the outer side of the multiple nested annular tubes (7) and the telescopic coating cylindrical block. A limiting ring (9) is installed on the inner side of the multiple nested annular tubes (7) and the limiting sleeve (2). Multiple limiting telescopic shafts are installed on the pairs of limiting rings (9). The limiting telescopic shafts are movably inserted into the telescopic rings (8). A circular electromagnet (10) is installed on the limiting ring (9). A circular magnet (11) is installed on the telescopic ring (8). An electromagnetic expander (12) is installed on the side wall of the nested annular tubes (7). A limiting insert block (13) is installed on the electromagnetic expander (12). An extended cleaner and a sprayer are installed on the telescopic coating cylindrical block.

2. The anti-corrosion coating device for the inner wall of a plastic-coated composite steel pipe according to claim 1, characterized in that, The extended cleaner includes multiple arc-shaped cleaning blocks (14). The telescopic coated cylindrical block and the multiple arc-shaped cleaning blocks (14) are provided with telescopic grooves (15). The telescopic grooves (15) are convex in cross-section. A convex telescopic block (16) is installed on the inner side of the telescopic groove (15). Angle limiting blocks (17) are installed on the convex telescopic blocks (16). The angle limiting blocks (17) are concave in shape. Scissor brackets (18) are installed on two pairs of angle limiting blocks (17). A pair of extended ring electromagnets (19) are installed on the inner side of the telescopic groove (15). An extended ring magnet (20) (11) is installed on the convex telescopic block (16). A compression spring column (6) is installed on a pair of convex telescopic blocks (16). A cleaning brush is installed on the arc-shaped cleaning block (14).

3. The anti-corrosion coating device for the inner wall of a plastic-coated composite steel pipe according to claim 2, characterized in that, The sprayer includes a spider web spray pipe, which is inserted into the telescopic coating cylinder block. A diversion spray pipe is installed on the spider web spray pipe, which is also inserted into the telescopic coating cylinder block. A feeding valve is installed on the diversion spray pipe, and a flexible diversion pipe is installed on the feeding valve.

4. The anti-corrosion coating device for the inner wall of a plastic-coated composite steel pipe according to claim 3, characterized in that, A displacement sensor is installed on the inner side of the limiting sleeve (2).

5. The anti-corrosion coating device for the inner wall of a plastic-coated composite steel pipe according to claim 4, characterized in that, A vortex flow meter is installed at the inlet of the spider web spray pipe.

6. The anti-corrosion coating device for the inner wall of a plastic-coated composite steel pipe according to claim 5, characterized in that, The inner wall of the flexible drainage tube is coated with a Teflon coating.

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