A pipe inner wall anti-corrosion spraying machine
By using centrifugal force-driven electronic nozzles and modular components, the problem of low efficiency in pipeline inner wall spraying anti-corrosion methods has been solved, achieving efficient and low-cost spraying results that are adaptable to different pipe diameters and complex pipeline structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA YANGTZE POWER
- Filing Date
- 2025-06-17
- Publication Date
- 2026-07-03
AI Technical Summary
Existing methods for spraying anti-corrosion coating on the inner walls of pipelines are inefficient, require a lot of manual intervention, involve high equipment investment, are prone to damage to spray nozzles, and have low automation levels, resulting in high construction and management costs.
The electronic nozzle, driven by centrifugal force, combined with adjustable casters, an arc-shaped cover plate, and a magnetic structure, achieves automatic nozzle protection and coating uniformity, while modular components reduce maintenance costs.
It improves spraying efficiency and coating uniformity, reduces manual operation intensity and construction costs, enhances the equipment's passability and stability in complex pipeline sections, and ensures nozzle protection and paint utilization.
Smart Images
Figure CN224443430U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of corrosion protection technology, specifically a spraying machine for corrosion protection of the inner wall of pipelines. Background Technology
[0002] As core infrastructure in energy, water conservancy, and chemical industries, such as large hydropower stations, pipelines have long faced challenges due to internal wall corrosion, which significantly impacts the lifespan and safety of operating systems. The media transported within pipelines often contain various corrosive ions, silt, and other inclusions, creating complex corrosive environments on the pipeline's inner wall under varying temperatures and flow rates. Over time, this leads to corrosion failure. Internal corrosion is often insidious; statistics show that internal corrosion perforation accounts for up to 90% of pipeline corrosion, far exceeding external corrosion. Therefore, pipelines operating in complex environments require coating or electrochemical corrosion protection. Currently, commonly used pipeline internal wall coating methods include manual or mechanical brushing and high-pressure air blasting. While these methods are effective to some extent, they have significant limitations. Traditional methods require substantial manual intervention or equipment investment, resulting in low efficiency; electrochemical corrosion protection methods have high energy demands, leading to high energy consumption; and the low level of automation in adjusting and controlling different pipe diameters and nozzles during coating requires specific settings and manual maintenance, resulting in high construction and management costs.
[0003] Existing methods for spraying anti-corrosion coating on the inner walls of pipelines typically involve using pipeline internal anti-corrosion spraying machines. After the application is complete, these machines cannot effectively protect the nozzles, which are easily damaged due to environmental factors and human error. Therefore, there is an urgent need for a spraying machine that can conceal the nozzles when not in use, providing automatic protection and improving construction efficiency, ease of maintenance, and reduced maintenance costs. Utility Model Content
[0004] To address the aforementioned issues, this invention provides a pipe inner wall anti-corrosion spraying machine that utilizes centrifugal force to make the electronic nozzle retractable, effectively improving the protection of the nozzle.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a pipe inner wall anti-corrosion spraying machine, including an installation cylinder and a cylinder cover, wherein the cylinder cover is rotatably connected to the installation cylinder;
[0006] The mounting cylinder is a cavity, and mounting blocks are arranged around the outside of the mounting cylinder. Each mounting block is hinged with a mounting plate by a torsion spring, and the end of the mounting plate is provided with a movable wheel.
[0007] The mounting cylinder has a mounting frame on the side wall away from the torsion spring. A second drive motor is mounted on the mounting frame. The second drive motor has an output shaft that passes through the mounting cylinder and extends into the side near the torsion spring. A circular mounting block is provided on one side of the output shaft. An electronic nozzle is slidably mounted inside the mounting block. Each electronic nozzle has a flexible tube. The other end of the flexible tube passes through the cylinder cover and extends into it. Each electronic nozzle will be thrown outward under the rotation of centrifugal force.
[0008] Preferably, one of the mounting plates is provided with a first drive motor, and the output shaft of the first drive motor is connected to the moving wheel.
[0009] Preferably, an arc-shaped cover plate is provided around the outer side of the circular mounting block, and the arc-shaped cover plate covers the electronic nozzle.
[0010] Preferably, each of the arc-shaped cover plates is provided with a magnet, and the magnet is in contact with the inner wall of the circular mounting block.
[0011] Preferably, the output shaft is provided with fan blades.
[0012] Preferably, the electronic nozzle is fitted with a spring.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] This utility model discloses a pipe inner wall anti-corrosion spraying machine that uses centrifugal force to drive an electronic nozzle to adaptively expand, combined with adjustable moving wheels to achieve efficient coverage spraying of the pipe inner wall. Through centrifugal ejection and spring reset, the electronic nozzle automatically adjusts its spray radius according to the rotation speed, adapting to different pipe diameters and ensuring coating uniformity. The torsion spring hinged mounting plate and independently driven moving wheel structure improve the equipment's passability and stability in complex pipe diameter sections (such as diameter changes and bends). An arc-shaped cover plate and magnetic structure provide double protection for the nozzle, preventing paint contamination during non-operational states. Simultaneously, the integrated fan blade design utilizes rotating airflow to assist in spray atomization and exhaust gas discharge, improving paint utilization and operational safety. Modular components (independent drive motor, detachable hose) reduce maintenance costs, and the spring buffer device reduces nozzle collision damage. The overall solution combines high efficiency, flexibility, and reliability, significantly reducing manual operation intensity and construction costs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the anti-corrosion spraying machine of this utility model.
[0016] Figure 2 This is a cross-sectional view of the anti-corrosion spraying machine of this utility model.
[0017] Figure 3 This is a schematic diagram of the installation structure of the connecting plate of this utility model.
[0018] Figure 4 This is a cross-sectional view of the circular mounting block of this utility model.
[0019] Figure 5 This is a detailed structural drawing of the electronic nozzle of this utility model.
[0020] Figure 6 This is a schematic diagram of the arc-shaped cover plate of this utility model.
[0021] Figure 7 This is a schematic diagram of the output shaft and fan blades of this utility model.
[0022] In the diagram: 1. Mounting cylinder; 2. Cylinder cover; 3. Mounting block; 4. Torsion spring; 5. Mounting plate; 6. Moving wheel; 7. First drive motor; 8. Mounting frame; 9. Second drive motor; 10. Output shaft; 11. Circular mounting block; 12. Electronic nozzle; 13. Hose; 14. Spring; 15. Arc-shaped cover plate; 16. Magnet; 17. Fan blade. Detailed Implementation
[0023] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals 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 intended to explain this utility model, and should not be construed as limiting this utility model.
[0024] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] Please see Figure 1-7 This embodiment provides a pipe inner wall anti-corrosion spraying machine, including an installation cylinder 1 and a cylinder cover 2, wherein the cylinder cover 2 is rotatably connected to the installation cylinder 1;
[0028] The mounting cylinder 1 is a cavity, and mounting blocks 3 are arranged around the outside of the mounting cylinder 1. Each mounting block 3 is hinged to a mounting plate 5 by a torsion spring 4. The end of the mounting plate 5 is provided with a movable wheel 6.
[0029] The mounting cylinder 1 has a mounting frame 8 on the side wall away from the torsion spring 4. The mounting frame 8 has a second drive motor 9. The second drive motor 9 has an output shaft 10. The output shaft 10 passes through the mounting cylinder 1 and extends into the side close to the torsion spring 4. A circular mounting block 11 is provided on one side of the output shaft 10. An electronic nozzle 12 is slidably mounted in the mounting block 11. Each electronic nozzle is equipped with a flexible hose 13. The other end of the flexible hose 13 passes through the cylinder cover 2 and extends in. Each electronic nozzle 12 will be thrown outward under the rotation of centrifugal force.
[0030] like Figures 2 to 5As shown, the second drive motor 9 is fixed to the mounting frame 8 with bolts. The mounting frame 8 is welded to a pre-set groove on the side wall of the mounting cylinder 1 (the groove depth ensures that the motor output shaft 10 coincides with the axis of the mounting cylinder 1). The output shaft 10 uses a high-precision sealed bearing to pass through the mounting cylinder 1, and its end is connected to a circular mounting block 11 by a thread. Three sets of dovetail-shaped sliding grooves are opened radially inside the circular mounting block 11. The tail of the electronic nozzle 12 is equipped with a matching trapezoidal slider. The bottom of the slider is fitted with a graphite copper sleeve to reduce sliding friction. Each electronic nozzle 12 is pre-pressed to the retracted position by a built-in spring 14 (in normal conditions, the electronic nozzle 12 is completely retracted into the mounting block 11). Its surface is coated with Teflon coating to prevent paint adhesion. The hose 13 is a pressure-resistant polyurethane spiral tube. One end is locked to the liquid inlet of the electronic nozzle 12 through a compression fitting. The other end passes through the center hole of the cylinder cover 2 and is connected to the paint booster pump. A rotary sealing joint is installed at the center hole to ensure that the pipeline rotates with the mounting cylinder 1 without leakage. At this time, the second drive motor 9 drives the output shaft 10 to rotate at a speed of 1200-1800 rpm. Under the action of centrifugal force, the electronic nozzle 12 slides outward along the slide groove to the maximum stroke (at this time, the compression of the spring 14 reaches the design value). The paint is delivered to the nozzle through the hose 13. Its atomization cone angle automatically expands as the speed increases (the cone angle reaches 60° at 1500 rpm and expands to 85° at 1800 rpm), so as to achieve uniform coating coverage within the pipe diameter range of Φ300-Φ800mm. After the spraying is completed, the motor speed is reduced to below 300 rpm. Under the action of the spring 14 reset force, the electronic nozzle 12 automatically retracts into the circular mounting block 11. At this time, the arc-shaped cover plate 15 (adhered to the surface of the mounting block 11 by the magnetic suction plate 16) closes to protect the nozzle. At the same time, the fan blade 17 (three-blade aluminum alloy material) at the end of the output shaft 10 rotates synchronously at low speed, generating an airflow of 0.8-1.2m / s to help discharge residual paint droplets and prevent them from depositing in the cylinder.
[0031] Example 1
[0032] like Figure 2 As shown, a pipe inner wall anti-corrosion spraying machine includes:
[0033] One end of the mounting cylinder 1 is rotatably connected to the cylinder cover 2 via an internal thread. An output shaft 10 passes through the center of the cylinder cover 2, and the end of the output shaft 10 is connected to a circular mounting block 11. Four sets of mounting blocks 3 are arranged around the outer side of the mounting cylinder 1. Each mounting block 3 is connected to a mounting plate 5 via a torsion spring 4. A moving wheel 6 is installed at the end of each mounting plate 5. A mounting frame 8 is provided on the side of the mounting cylinder 1 away from the torsion spring 4, and the mounting frame 8 is equipped with a second drive motor 9. In operation, a pipe inner wall anti-corrosion spraying machine is placed inside the pipe with manual assistance and moves to spray under the drive of the first drive motor 7. The paint in the mounting cylinder 1 is transported to the electronic nozzle 12 through a hose 13. Under the action of centrifugal force, the electronic nozzle 12 extends out of the circular mounting block 8 and begins to spray the paint evenly.
[0034] Example 2
[0035] like Figure 3 As shown, a first drive motor 7 is provided on the mounting plate 5 of a pipe inner wall anti-corrosion spraying machine, and the output shaft of the first drive motor 7 is connected to the moving wheel 6.
[0036] A motor mounting base is provided at the end of the longitudinal extension arm of one of the mounting plates 5. The first drive motor 7 is fastened to the base by four sets of M8 hexagon socket bolts. The end of the motor output shaft is machined into a D-shaped section to form a circumferential positioning fit with the D-shaped shaft hole in the center of the movable wheel 6, and axial limiting is achieved by a shaft elastic retaining ring. The movable wheel 6 adopts a polyurethane coated wheel structure, and its hub surface is provided with annular anti-slip texture. The movable wheel 6 is powered by the first drive motor 7 and moves close to the inner wall of the pipe, assisting a pipe inner wall anti-corrosion spraying machine to change different spraying areas inside the pipe, thereby achieving complete coverage of the inner wall of the pipe with coating and achieving the effect of anti-corrosion.
[0037] Example 3
[0038] like Figure 4 , Figure 5 , Figure 6 As shown, a circular mounting block 11 of a pipe inner wall anti-corrosion spraying machine is provided with an electronic nozzle 12 inside, and an arc-shaped cover plate 15 is provided around the outside. When the pipe inner wall anti-corrosion spraying machine stops working, the arc-shaped cover plate 15 can completely cover the electronic nozzle 12, and a spring 14 is sleeved on the electronic nozzle 12. Each arc-shaped cover plate 15 is provided with a magnet 16, and the magnet 16 is in contact with the inner wall of the circular mounting block 11.
[0039] The outer side wall of the circular mounting block 11 has four sets of U-shaped grooves, and four sets of 5mm diameter pivot pins are protruding on its inner arc surface. After the pins are embedded in the grooves, they are axially fixed by E-type retaining rings, so that each arc-shaped cover plate 15 can swing freely around the axis of the mounting block 11.
[0040] The magnets 16 (with anti-rust coating) embedded at the ends of each arc-shaped cover plate 15 are distributed along the thickness direction of the cover plate and form a magnetic attraction with the stainless steel magnetic ring pre-embedded in the inner wall of the circular mounting block 11. One end of the spring 14 abuts against the annular limiting platform of the electronic nozzle 12, and the other end is pressed against the inner wall of the stepped hole of the circular mounting block 11. Under normal conditions, the spring preload causes the nozzle 12 to retract completely into the mounting block 11.
[0041] During the operation of a pipe inner wall anti-corrosion spraying machine at a certain speed, the cover plate 15 automatically opens along the rotating shaft under the action of centrifugal force. The spring 14 undergoes elastic deformation within its elastic limit, stretching the spring 14 to its working stroke. At this time, the electronic nozzle 12 sprays coating material at a certain cone angle. When the work is finished, the rotational speed of the output shaft 10 decreases, and the remaining compression of the spring provides a reverse buffering force. The spring 14 drives the electronic nozzle 12 to reset, and the magnetic attraction force of the magnet 16 drives the cover plate 15 to reset and fit, ensuring that when the electronic nozzle 12 is stored, it forms a 0.3mm elastic seal with the silicone sealing ring (Shore hardness 40A) on the inner wall of the cover plate 15, preventing coating material from seeping into the groove.
[0042] Example 4
[0043] like Figure 7 As shown, the output shaft 10 is equipped with fan blades 17. The output shaft 10 rotates at a certain speed under the drive of the second drive motor 9, which in turn drives the fan blades 17 to rotate synchronously. During the rotation of the fan blades 17, not only can the dispersion of the coating be enhanced, making it better adhere to the inner wall of the pipe, but the coating can also achieve a rapid drying effect after adhesion.
[0044] The above specific embodiments are merely explanations of the present utility model and are not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to the embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.
Claims
1. A pipe inner wall anti-corrosion spraying machine, characterized in that: It includes a mounting cylinder (1) and a cylinder cover (2), wherein the cylinder cover (2) is rotatably connected to the mounting cylinder (1); The mounting cylinder (1) is a cavity, and mounting blocks (3) are arranged around the outside of the mounting cylinder (1). Mounting plates (5) are hinged to each mounting block (3) by torsion springs (4). The end of the mounting plate (5) is provided with a moving wheel (6). The mounting cylinder (1) has a mounting frame (8) on the side wall away from the torsion spring (4). The mounting frame (8) has a second drive motor (9) and an output shaft (10). The output shaft (10) passes through the mounting cylinder (1) and extends to the side near the torsion spring (4). A circular mounting block (11) is provided on one side of the output shaft (10). An electronic nozzle (12) is slidably provided in the mounting block (11). Each electronic nozzle is provided with a flexible hose (13). The other end of the flexible hose (13) passes through the cylinder cover (2) and extends in. Each electronic nozzle (12) will be thrown outward under the rotation of centrifugal force.
2. A pipe internal wall anticorrosive spraying machine according to claim 1, characterized in that: One of the mounting plates (5) is provided with a first drive motor (7), and the output shaft of the first drive motor (7) is connected to the moving wheel (6).
3. A pipe internal wall anticorrosive spraying machine according to claim 2, characterized in that: The circular mounting block (11) is surrounded by an arc-shaped cover plate (15) that rotates around it, and the arc-shaped cover plate (15) covers the electronic nozzle (12).
4. A pipe internal wall anticorrosive spraying machine according to claim 3, characterized in that: Each of the arc-shaped cover plates (15) is provided with a magnet (16), and the magnet (16) is in contact with the inner wall of the circular mounting block (11).
5. A pipe interior wall anticorrosive spraying machine according to claim 1, characterized in that: The output shaft (10) is provided with fan blades (17).
6. A pipe interior wall anticorrosive spraying machine according to claim 1, characterized in that: The electronic nozzle (12) is fitted with a spring (14).