A coating device for the inner wall of small-bore pipes

Abstract

The utility model discloses a kind of coating coating devices for small-bore pipeline inner wall, including pressurizing device, stirring device, feeding device and pipe body, the pressurizing device is connected with lining injection hose by pressurizing short pipe, the lining injection hose is assembled with stirring device and feeding device connection, the utility model relates to small-bore pipeline repair technical field, by the synergistic effect of pressurizing device and lining ball, after stirring device completes coating mixing, coating is injected into feeding device by pressurizing device, then coating is ejected from feeding device to pipe body by pressurizing device and lining ball, realize the coating coating of pipeline inner wall, effectively ensure that coating is uniformly formed in narrow pipeline space, and keep thickness consistent, significantly improve coating quality and reliability, can adapt to complex construction environment, greatly improve work efficiency, reduce maintenance cost, provide a kind of efficient and feasible coating solution for the inner wall protection of small-bore pipeline.

Description

Technical Field

[0001] This utility model relates to the field of small-diameter pipe repair technology, specifically a coating device for the inner wall of small-diameter pipes. Background Technology

[0002] Gas pipelines have become an indispensable energy transmission infrastructure in urban gas supply systems. During long-term operation, pipelines are often exposed to H2S, H2O, CO2, O2, and Cl-. - In various corrosive media such as NH3, corrosion can lead to various forms of damage, including uniform corrosion, crevice corrosion, galvanic corrosion, and stress corrosion. This corrosion not only weakens the pipeline's load-bearing capacity but can also cause gas leaks, endangering public safety and resulting in significant economic losses.

[0003] Currently, traditional repair methods such as pipe replacement or welding are mainly used to address pipeline corrosion issues. However, these methods are quite difficult to implement in actual maintenance of old pipelines. Because these pipelines are often located in complex spaces such as deep underground or inside high-rise buildings, maintenance operations are challenging and costly. Replacing an entire section of pipeline often requires large-scale excavation and demolition work, which not only significantly disrupts the surrounding environment but also prolongs the construction period and increases project risks.

[0004] Therefore, there is an urgent need for a coating device that can achieve structural repair and corrosion protection of small-diameter pipes in the absence of construction conditions. In view of this, in-depth research was conducted on the above-mentioned problems, which led to this case. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a coating device for the inner wall of small-diameter pipes, which solves the problem that traditional coating processes such as spraying, roller coating, and brush coating are difficult to achieve efficient and uniform coating of the inner wall of small-diameter pipes in limited space, long length, and complex construction environments.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a coating device for the inner wall of a small-diameter pipe, comprising a pressurizing device, a stirring device, a feeding device, and a pipe body. The pressurizing device is connected to an inner lining injection hose via a pressurizing short pipe. The inner lining injection hose is assembled and connected to the stirring device and the feeding device. The stirring device has a stirring blade and a discharge port inside, and the discharge port is connected to the feeding device. The feeding device adopts a three-way structure, with one end connected to the pipe body and the other end having a freely openable and closable active channel. An inner lining ball is placed inside the feeding device.

[0007] The aforementioned pressurization device includes a pressure gauge, pressure regulating valve, direction switching valve, power indicator light, pressurization indicator light, pressure reduction indicator light, air outlet, and pressurization short pipe, all mounted on the air pump body.

[0008] The aforementioned inner lining sphere is a polyurethane elastic sphere with a diameter that matches the inner diameter of the tube.

[0009] The diameters of the aforementioned inner lining balls are 25mm, 32mm, 40mm, and 50mm.

[0010] A recycling device is installed on one side of the open end of the aforementioned pipe to recycle any remaining paint. Beneficial effects

[0011] This invention provides a coating device for the inner wall of small-diameter pipes. It offers the following advantages: Through the synergistic action of a pressurizing device and an inner lining ball, after the coating is mixed by a stirring device, the pressurizing device injects the coating into a feeding device. The pressurizing device then pushes the inner lining ball to eject the coating from the feeding device into the pipe body, achieving coating of the inner wall. This effectively ensures uniform coating formation and consistent thickness within the confined space of the pipe, significantly improving coating quality and reliability. Furthermore, this device is compact, easy to operate, and adaptable to complex construction environments, greatly improving work efficiency and reducing maintenance costs. It provides an efficient and feasible coating solution for the inner wall protection of small-diameter pipes, effectively solving the problem that traditional coating processes such as spraying, roller coating, and brushing are insufficient for achieving efficient and uniform coating of the inner wall of small-diameter pipes in limited spaces, long lengths, and complex construction environments. This effectively reduces social impact and overall costs, and provides a more feasible solution, especially for the long-term maintenance of aging gas pipelines. Attached Figure Description

[0012] Figure 1 This is a front view structural schematic diagram of a coating device for the inner wall of a small-diameter pipe according to the present invention.

[0013] Figure 2 This is a schematic diagram of the coating operation state of the coating device for the inner wall of a small-diameter pipe according to the present invention.

[0014] Figure 3 This is an isometric structural diagram of the pressurization device described in this utility model.

[0015] Figure 4 This is an isometric structural diagram of the stirring device described in this utility model.

[0016] Figure 5 This is an isometric structural diagram of the feeding device described in this utility model.

[0017] In the diagram: 1. Pressurization device; 101. Pressure gauge; 102. Pressure regulating valve; 103. Direction switching valve; 104. Power indicator light; 105. Pressurization indicator light; 106. Pressure reduction indicator light; 107. Air outlet; 2. Stirring device; 201. Stirring blade; 202. Air inlet; 203. Discharge outlet; 3. Feeding device; 301. Air guide valve; 302. Activation channel; 303. Liner ball; 4. Pipeline; 5. Pressurization short pipe; 6. Liner injection hose; 7. Recovery device. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example: Refer to the appendix of the instruction manual Figure 1-5 It is known that, in order to solve the problem that traditional coating processes such as spraying, roller coating, and brush coating are difficult to achieve efficient and uniform coating of the inner wall of small-diameter pipes in limited space, long length, and complex construction environments, this application specifically designs: 1. A coating device for the inner wall of small-diameter pipes, including a pressurizing device 1, a stirring device 2, a feeding device 3, and a pipe body 4. The pressurizing device 1 is connected to the inner lining injection hose 6 through a pressurizing short pipe 5. The inner lining injection hose 6 is assembled and connected to the stirring device 2 and the feeding device 3. The stirring device 2 is provided with a stirring blade 201 and a discharge port 202 inside. The discharge port 202 is connected to the feeding device 4. The feeding device 3 is connected to the pipe body 4. The feeding device 3 adopts a three-way structure with one end connected to the pipe body 4 and the other end provided with an active channel 302 that can be freely opened and closed. The feeding device 3 contains a liner ball 303. Through the synergistic action of the pressurizing device 1 and the liner ball 303, after the mixing device 2 completes the coating mixing, the pressurizing device 1 injects the coating into the feeding device 3. Then, the pressurizing device 1 pushes the liner ball 303 to push the coating out from the feeding device into the pipe body 4, thereby achieving coating of the inner wall of the pipe body 4. This effectively ensures that the coating is uniformly formed in the narrow pipe space and maintains a consistent thickness, significantly improving the coating quality and reliability. Furthermore, this device is compact in structure and easy to operate, adaptable to complex construction environments, significantly improving work efficiency and reducing maintenance costs. It provides an efficient and feasible coating solution for the inner wall protection of small-diameter pipelines, effectively solving the problem that traditional coating processes such as spraying, roller coating, and brush coating are difficult to achieve efficient and uniform coating of the inner wall of small-diameter pipelines in limited space, long length, and complex construction environments. It can effectively reduce social impact and overall costs, and in particular, provides a more feasible solution for the long-term maintenance of old gas pipelines.

[0020] In the specific implementation process, the pressurizing device 1 includes a pressure gauge 101 installed on the air pump body for real-time display of working pressure, a pressure regulating valve 102 for adjusting air pressure, a direction switching valve 103 for opening and closing to adjust the airflow direction, a power indicator light 104 for indicating whether the power is on, a pressurizing indicator light 105 for pressurizing reminder, a depressurizing indicator light 106 for depressurizing reminder, and an air outlet 107 for connecting to the pressurizing short pipe 5.

[0021] In the specific implementation process, the aforementioned inner lining ball 303 is a polyurethane elastic ball with a diameter that matches the inner diameter of the pipe body 4. The diameter of the inner lining ball 303 is 25mm, 32mm, 40mm and 50mm, which can effectively ensure that the coating is uniformly formed in the narrow pipe space and the thickness is stable and controllable. It is suitable for coating operations on the inner wall of small diameter (≤50mm) pipes.

[0022] In the specific implementation process, a recycling device 7 is installed on one side of the open end of the above-mentioned pipe body 4 to recycle the remaining paint.

[0023] The working principle is as follows: In use, first open the sealing cap on top of the mixing device 2 and add the paint. Start the mixing device 2, using the stirring blades 201 to mix the paint evenly. Then close the sealing cap to ensure the device is airtight and prevent air leakage. Next, connect the air inlet 202 of the mixing device 2 to the inner lining injection hose 6, and connect the outlet 203 to the feeding device 3. It should be noted that before this stage, the operator can pre-adjust the airflow pressure and direction using the pressurizing device 1: set the required system working pressure through the pressure regulating valve 102, and confirm the airflow direction is towards the mixing device 2 through the direction switching valve 103. After adjustment, start the pressurizing device 1, using the airflow pressure to force the paint in the mixing device 2 into the feeding device 3.

[0024] After feeding is completed, the stirring device 2 located at the top of the feeding device 3 is removed, and the inner liner ball 303 is placed inside the feeding device 3 through the freely openable and closable active channel 302. The air guide valve 301 is installed at the top of the feeding device 3, ensuring its sealing. The operating direction switching valve 103 switches the airflow direction to the top of the feeding device 3, and secondary pressurization can be performed again as needed through the pressure regulating valve 102. Under pressure, the inner liner ball 303 pushes the coating material in the pipe body 4 forward, thereby uniformly coating the inner wall of the pipe body 4. During this process, inner liner balls of different diameters can be selected according to the specific size of the pipe. After the inner liner ball 303 pushes the coating material to the end of the pipe body 4, it can be recovered by the recovery device 7. The recovered coating material and inner liner ball 303 can be recoated under the drive of the pressurizing device 1, which greatly improves the utilization rate of materials and the applicability of the device, and is conducive to the promotion and application of this technology.

[0025] In the description of this utility model, it should be understood that the terms "sealing cap," "pressurizing short pipe," "inner lining injection hose," "feeding device," "air guide valve," "inner lining ball," and "recovery device" all refer to the component structures described in the embodiments of this utility model. Their shapes, relative positions, and connection relationships can be referred to the accompanying drawings, and do not constitute an absolute limitation on the actual implementation. The terms "open," "add," "close," "connect," "set," "start," "place," "install," "switch," "calibrate," "push," and "recover" should be interpreted broadly. For example, "connection" can be a flange connection, threaded connection, or quick coupling connection; "installation" can be a fixed installation or a detachable installation; "push" can refer to direct contact pushing or indirect pushing through fluid pressure. The "pressure regulating valve" is used to regulate and stabilize the system pressure, and the "direction switching valve" is used to change the direction of the fluid passage. Their specific implementations can be manual, electric, hydraulic, or pneumatic, all of which fall within the protection scope of this utility model. The terms "secondary pressurization" and "secondary coating" are only for the convenience of describing the operation process and do not represent a limit on the number of times; multiple pressurizations or coatings can also be performed. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] 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 coating device for the inner wall of small-diameter pipes, characterized in that, It includes a pressurizing device (1), a stirring device (2), a feeding device (3), and a pipe body (4). The pressurizing device (1) is connected to the inner lining injection hose (6) through a pressurizing short pipe (5). The inner lining injection hose (6) is assembled and connected to the stirring device (2) and the feeding device (3). The stirring device (2) is provided with a stirring blade (201) and a discharge port (202) inside. The discharge port (202) is connected to the feeding device (3). The feeding device (3) adopts a three-way structure and one end is connected to the pipe body (4), and the other end is provided with an active channel (302) that can be opened and closed freely. The feeding device (3) contains an inner lining ball (303).

2. The coating device for the inner wall of a small-diameter pipe according to claim 1, characterized in that, The pressurizing device (1) includes a pressure gauge (101), a pressure regulating valve (102), a direction switching valve (103), a power indicator light (104), a pressurizing indicator light (105), a pressure reducing indicator light (106), an air outlet (107), and a pressurizing short pipe (5) installed on the air pump body.

3. The coating device for the inner wall of a small-diameter pipe according to claim 1, characterized in that, The inner liner ball (303) is a polyurethane elastic ball with a diameter that matches the inner diameter of the tube (4).

4. A coating device for the inner wall of a small-diameter pipe according to claim 3, characterized in that, The diameters of the inner liner spheres (303) are 25mm, 32mm, 40mm and 50mm.

5. A coating device for the inner wall of a small-diameter pipe according to claim 1, characterized in that, The tube (4) is equipped with a recycling device (7) on one side of the open end to recycle the remaining paint.

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