An underground pipe having a viscoelastic anticorrosive coating
By installing multi-layered protective structures and connection devices on underground pipelines, the problems of pipeline corrosion and deformation are solved, and the corrosion resistance and pressure resistance are improved, ensuring the purity of liquid transportation and the stability of connections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CAITIAN CHEM
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-09
Smart Images

Figure CN224339644U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline-related technology, and in particular to an underground pipeline with a viscoelastic anti-corrosion coating. Background Technology
[0002] Underground pipelines are an important component of modern urban infrastructure. Underground water supply networks transport water sources (such as treated water from reservoirs and rivers) to various areas of the city, providing daily water for residents, businesses, and public facilities, ensuring the normal operation of people's lives and production activities. Underground drainage pipes collect domestic sewage, industrial wastewater, and rainwater in the city, transporting them to sewage treatment plants for treatment or discharging them directly into natural water bodies to prevent urban flooding and maintain the cleanliness and hygiene of the urban environment. Laying various types of pipelines underground avoids the need for a large number of pipeline facilities on the ground, making the urban surface space cleaner and more open, which is conducive to the aesthetics of the city and the effective use of land.
[0003] However, most existing underground pipelines, especially those with a viscoelastic anti-corrosion coating, are prone to corrosion. The liquid transported inside the pipeline may corrode it, causing the pipeline to malfunction or leak during transport. The pipeline is also easily compressed by external soil, leading to deformation. Utility Model Content
[0004] The purpose of this utility model is to provide an underground pipeline with a viscoelastic anti-corrosion coating to solve the problems mentioned in the background art. Most of the existing underground pipelines with viscoelastic anti-corrosion coatings are easily corroded. The liquid transported inside the pipeline may corrode the pipeline, resulting in the pipeline being unable to transport normally or leaking the liquid during transportation. The pipeline is also easily compressed by the external soil, resulting in pipeline deformation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an underground pipeline with a viscoelastic anti-corrosion coating, comprising a fiberglass pipe, wherein a protective mechanism is provided on the outside of the fiberglass pipe, and an installation mechanism is provided on the outside of the fiberglass pipe;
[0006] The protective mechanism includes an anti-corrosion coating, a first adhesive layer, a waterproof layer, a reinforcing plate, a second adhesive layer, and an anti-corrosion layer. The inner wall of the fiberglass pipe is provided with an anti-corrosion coating, the outer wall of the fiberglass pipe is provided with a first adhesive layer, the outer wall of the first adhesive layer is provided with a waterproof layer, the outer side of the waterproof layer is provided with a reinforcing plate, the outer wall of the reinforcing plate is provided with a second adhesive layer, and the outer wall of the second adhesive layer is provided with an anti-corrosion layer.
[0007] Preferably, the installation mechanism includes a flange, bolt groove, bolts, sealing ring, protective sleeve, and filter screen. The flange is installed on the outside of the anti-corrosion layer. The outer wall of the flange has bolt grooves. Bolts are installed on the outside of the flange. A sealing ring is installed on the outside of the flange. A protective sleeve is fixedly installed on the outer wall of the sealing ring. A filter screen is installed inside the flange.
[0008] Preferably, the anti-corrosion coating is made of viscoelastic anti-corrosion paste, and the first adhesive layer is made of polyurethane.
[0009] Preferably, the waterproof layer is made of PVC polymer roll material, and the outer wall dimensions of the waterproof layer match the inner wall dimensions of the reinforcing plate.
[0010] Preferably, the reinforcing plate is made of polymer lining, and the anti-corrosion layer is made of epoxy coal tar pitch.
[0011] Preferably, the flange is provided with two sets, and the bolt grooves are equally spaced on the outer wall of the flange.
[0012] Preferably, the bolts are evenly spaced on the outside of the flange, and the outer wall size of the sealing ring matches the inner wall size of the protective sleeve.
[0013] Preferably, the filter screen is provided in two sets, and the outer wall size of the filter screen matches the inner wall size of the flange.
[0014] Compared with the prior art, the beneficial effects of this utility model are: the underground pipeline with viscoelastic anti-corrosion coating strengthens the overall structure of the pipeline, and an anti-corrosion coating is applied to its transport surface so that the transported liquid will not come into direct contact with the pipeline. In addition, a reinforcing plate is placed on the outside of the pipeline so that the pipeline will not be deformed due to pressure from the external soil. The pipeline is convenient to connect with other pipelines and saves the labor of workers. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall appearance and structure of the present utility model;
[0016] Figure 2 This is a schematic diagram of the structure of the anti-corrosion coating of this utility model used in conjunction with fiberglass pipe;
[0017] Figure 3 This is a schematic diagram of the structure of the reinforcing plate and the anti-corrosion layer used in conjunction with this utility model;
[0018] Figure 4 This is a schematic diagram of the structure of the flange and bolts used in this utility model.
[0019] Figure 5This is a schematic diagram of the structure of the sealing ring and protective sleeve used in conjunction with this utility model.
[0020] In the diagram: 1. Fiberglass pipe; 2. Protective mechanism; 21. Anti-corrosion coating; 22. First adhesive layer; 23. Waterproof layer; 24. Reinforcing plate; 25. Second adhesive layer; 26. Anti-corrosion layer; 3. Installation mechanism; 31. Flange; 32. Bolt groove; 33. Bolt; 34. Sealing ring; 35. Protective sleeve; 36. Filter screen. Detailed Implementation
[0021] 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.
[0022] Please see Figure 1-5 This utility model provides a technical solution: an underground pipeline with a viscoelastic anti-corrosion coating, including a fiberglass pipe 1, a protective mechanism 2 on the outside of the fiberglass pipe 1, and an installation mechanism 3 on the outside of the fiberglass pipe 1.
[0023] The protective mechanism 2 includes an anti-corrosion coating 21, a first adhesive layer 22, a waterproof layer 23, a reinforcing plate 24, a second adhesive layer 25, and an anti-corrosion layer 26. The inner wall of the fiberglass pipe 1 is fitted with the anti-corrosion coating 21, the outer wall with the first adhesive layer 22, the outer wall of the first adhesive layer 22 with the waterproof layer 23, the outer wall of the waterproof layer 23 with the reinforcing plate 24, the outer wall of the reinforcing plate 24 with the second adhesive layer 25, and the outer wall of the second adhesive layer 25 with the anti-corrosion layer 26. Through the arrangement of the anti-corrosion coating 21, the first adhesive layer 22, the waterproof layer 23, the reinforcing plate 24, the second adhesive layer 25, and the anti-corrosion layer 26, the fiberglass pipe 1 is protected from corrosion by the internal liquid and from deformation by external pressure. Firstly, an anti-corrosion coating 21 is applied to the inner wall of the fiberglass pipe 1, preventing direct contact with the liquid during transport. This protects the fiberglass pipe 1 from liquid corrosion. A first adhesive layer 22 is applied to the outer wall of the fiberglass pipe 1, followed by a waterproof layer 23. The first adhesive layer 22 strengthens the connection between the fiberglass pipe 1 and the waterproof layer 23, allowing the waterproof layer 23 to adhere more closely to the fiberglass pipe 1, thus better protecting it and preventing it from coming into contact with rainwater. A reinforcing plate 24 is added to the outside of the waterproof layer 23, strengthening the overall structure of the pipe and preventing deformation caused by external pressure. A second adhesive layer 25 is applied to the outer wall of the reinforcing plate 24, followed by an anti-corrosion layer 26. The second adhesive layer 25 strengthens the connection between the reinforcing plate 24 and the anti-corrosion layer 26, while the anti-corrosion layer 26 protects the reinforcing plate 24 from external acidic substances, preventing pipe deformation.
[0024] Furthermore, the installation mechanism 3 includes a flange 31, bolt grooves 32, bolts 33, a sealing ring 34, a protective sleeve 35, and a filter screen 36. The flange 31 is installed on the outside of the anti-corrosion layer 26. Bolt grooves 32 are formed on the outer wall of the flange 31. Bolts 33 are installed on the outside of the flange 31. A sealing ring 34 is installed on the outside of the flange 31. A protective sleeve 35 is fixedly installed on the outer wall of the sealing ring 34. A filter screen 36 is installed inside the flange 31. The arrangement of the flange 31, bolt grooves 32, bolts 33, sealing ring 34, protective sleeve 35, and filter screen 36 facilitates the installation between pipes. The flange 31 is placed on the two pipes to be installed, and then the two... After the flanges 31 are tightly fitted together, the bolts 33 can be used to fix the two flanges 31 together through the bolt grooves 32 on the flanges 31. After confirming that the bolts are tightened, the sealing ring 34 is placed at the connection between the two flanges 31, so that the sealing ring 34 can prevent liquid from leaking from the connection between the two flanges 31. After placement, the protective sleeve 35 is installed on the outside of the sealing ring 34, so that the sealing ring 34 will not come into direct contact with the outside, thus protecting the integrity of the sealing ring 34. A filter screen 36 is set between the two flanges 31, so that the liquid can filter out impurities and solids in the liquid when passing through the pipeline, thus maintaining the high purity of the transported liquid.
[0025] Furthermore, the anti-corrosion coating 21 is made of viscoelastic anti-corrosion paste, and the first adhesive layer 22 is made of polyurethane. The anti-corrosion coating 21 prevents the transported liquid from directly contacting the fiberglass pipe 1, thus protecting the fiberglass pipe 1 from being corroded by the transported liquid. The first adhesive layer 22 strengthens the connection between the fiberglass pipe 1 and the waterproof layer 23, allowing the waterproof layer 23 to better protect the fiberglass pipe 1.
[0026] Furthermore, the waterproof layer 23 is made of PVC polymer roll material. The outer wall size of the waterproof layer 23 matches the inner wall size of the reinforcing plate 24. Through the setting of the waterproof layer 23, rainwater from the outside will not come into contact with the fiberglass pipe 1, so that the fiberglass pipe 1 can transport liquid normally.
[0027] Furthermore, the reinforcing plate 24 is made of polymer lining, and the anti-corrosion layer 26 is made of epoxy coal tar pitch. The reinforcing plate 24 enhances the overall stability of the pipeline, preventing it from deforming due to external pressure. The anti-corrosion layer 26 protects the reinforcing plate 24, preventing it from coming into contact with acidic substances and thus preventing it from being corroded.
[0028] Furthermore, the flange 31 is provided with two sets of bolt grooves 32, which are equally spaced on the outer wall of the flange 31. The flange 31 makes it easier to connect pipes to each other.
[0029] Furthermore, the bolts 33 are evenly distributed on the outside of the flange 31, and the outer wall size of the sealing ring 34 matches the inner wall size of the protective sleeve 35. The sealing ring 34 prevents liquid from leaking out from the connection between the two flanges 31, while the protective sleeve 35 prevents the sealing ring 34 from directly contacting the outside, thus protecting the integrity of the sealing ring 34.
[0030] Furthermore, two sets of filter screens 36 are provided. The outer wall size of the filter screen 36 matches the inner wall size of the flange 31. By setting the filter screen 36, impurities in the liquid can be filtered out, making the liquid purer.
[0031] Working principle: First, an anti-corrosion coating 21 is applied to the inner wall of the fiberglass pipe 1, preventing direct contact with the liquid during transport and protecting it from corrosion. A first adhesive layer 22 is applied to the outer wall of the fiberglass pipe 1, followed by a waterproof layer 23. The first adhesive layer 22 strengthens the connection between the fiberglass pipe 1 and the waterproof layer 23, allowing the waterproof layer 23 to adhere more closely to the fiberglass pipe 1, thus better protecting it from rainwater. A reinforcing plate 24 is then added outside the waterproof layer 23, strengthening the overall structure of the pipe and preventing deformation caused by external pressure. A second adhesive layer 25 is applied to the outer wall of the reinforcing plate 24, followed by an anti-corrosion layer 26. The second adhesive layer 25 further strengthens the connection between the reinforcing plate 24 and the anti-corrosion layer 26. The anti-corrosion layer 26 protects the reinforcing plate 24 from external acidic substances and prevents pipe deformation. Flanges 31 are placed on the two pipes to be installed. After the two flanges 31 are tightly fitted together, bolts 33 are used to fix the two flanges 31 together through bolt grooves 32 on the flanges 31. After confirming that the bolts are tightened, the sealing ring 34 is placed at the connection between the two flanges 31 so that the sealing ring 34 can prevent liquid from leaking from the connection between the two flanges 31. After placement, the protective sleeve 35 is installed on the outside of the sealing ring 34 so that the sealing ring 34 does not come into direct contact with the outside and protects the integrity of the sealing ring 34. A filter screen 36 is set between the two flanges 31 so that the liquid can filter out impurities and solids in the liquid when passing through the pipe, so that the transported liquid maintains high purity.
[0032] 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. An underground pipeline with a viscoelastic anti-corrosion coating, comprising a fiberglass pipe (1), characterized in that: The fiberglass pipe (1) is provided with a protective mechanism (2) on its exterior and an installation mechanism (3) on its exterior. The protective mechanism (2) includes an anti-corrosion coating (21), a first adhesive layer (22), a waterproof layer (23), a reinforcing plate (24), a second adhesive layer (25), and an anti-corrosion layer (26). The inner wall of the fiberglass pipe (1) is provided with an anti-corrosion coating (21), the outer wall of the fiberglass pipe (1) is provided with a first adhesive layer (22), the outer wall of the first adhesive layer (22) is provided with a waterproof layer (23), the outer side of the waterproof layer (23) is provided with a reinforcing plate (24), the outer wall of the reinforcing plate (24) is provided with a second adhesive layer (25), and the outer wall of the second adhesive layer (25) is provided with an anti-corrosion layer (26).
2. The underground pipeline with a viscoelastic anti-corrosion coating according to claim 1, characterized in that: The installation mechanism (3) includes a flange (31), bolt groove (32), bolt (33), sealing ring (34), protective sleeve (35), and filter screen (36). The flange (31) is installed on the outside of the anti-corrosion layer (26). The outer wall of the flange (31) has a bolt groove (32). The bolt (33) is installed on the outside of the flange (31). The sealing ring (34) is installed on the outside of the flange (31). The protective sleeve (35) is fixedly installed on the outer wall of the sealing ring (34). The filter screen (36) is installed inside the flange (31).
3. The underground pipeline with a viscoelastic anti-corrosion coating according to claim 1, characterized in that: The anti-corrosion coating (21) is made of viscoelastic anti-corrosion paste, and the first adhesive layer (22) is made of polyurethane.
4. The underground pipeline with a viscoelastic anti-corrosion coating according to claim 1, characterized in that: The waterproof layer (23) is made of PVC polymer roll material, and the outer wall dimensions of the waterproof layer (23) match the inner wall dimensions of the reinforcing plate (24).
5. The underground pipeline with a viscoelastic anti-corrosion coating according to claim 1, characterized in that: The reinforcing plate (24) is made of polymer lining, and the anti-corrosion layer (26) is made of epoxy coal tar pitch.
6. The underground pipeline with a viscoelastic anti-corrosion coating according to claim 2, characterized in that: The flange (31) is provided with two sets, and the bolt grooves (32) are equally spaced on the outer wall of the flange (31).
7. The underground pipeline with a viscoelastic anti-corrosion coating according to claim 2, characterized in that: The bolts (33) are evenly distributed on the outside of the flange (31), and the outer wall size of the sealing ring (34) matches the inner wall size of the protective sleeve (35).
8. The underground pipeline with a viscoelastic anti-corrosion coating according to claim 2, characterized in that: The filter screen (36) is provided in two sets, and the outer wall size of the filter screen (36) matches the inner wall size of the flange (31).