Anti-corrosion structure of buried pipeline
By setting spiral grooves and gap protection belts on the outer wall of the buried pipeline, the cold-wrapped belts are ensured to be evenly wound, forming a multi-layer anti-corrosion structure, solving the problems of anti-corrosion coating failure and tight winding in the prior art, and achieving comprehensive anti-corrosion protection of the pipeline.
Patent Information
- Application Number
- CN202422287536.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The anti-corrosion coating of existing buried pipes is prone to failure during long-term use. The cold-wrapped belt is not tightly wrapped, resulting in failure of local protective functions, and cannot effectively prevent corrosion and leakage.
A spiral groove is provided on the outer wall of the pipeline, and the gap protection belt is laid to match the gap path of the cold-wrapped belt. The polyethylene anti-corrosion layer and the protrusions of the gap protection belt are used to ensure that the cold-wrapped belt is wound evenly, forming a multi-layer anti-corrosion structure.
Complete physical isolation between pipelines and soil is achieved, preventing local protection function failure, extending the corrosion prevention period, and improving corrosion prevention effect.
Smart Images
Figure CN223063485U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of buried pipelines, and specifically, to an anti-corrosion structure for buried pipelines. Background Art
[0002] Buried pipelines are carriers for oil and gas transmission and a link connecting upstream resources and downstream users. Since the pipelines are buried underground for a long time, over time, affected by factors such as the characteristics of the external soil and terrain settlement, the pipelines are prone to corrosion, perforation, and leakage, causing economic losses and environmental pollution. Currently, a common anti-corrosion measure for buried pipelines is to set an anti-corrosion coating on the outer side of the buried pipelines. However, during long-term use, the anti-corrosion coating will also gradually fail. To extend its service life, a cold wrap tape is often wound on the outer side of the buried pipelines to form an additional physical isolation between the pipelines and the soil. However, when winding the cold wrap tape, it is impossible to ensure that it is always tightly arranged. When there are gaps between the tapes, in addition, the cold wrap tape may not adhere firmly locally, both of which will lead to the failure of the local protection function.
[0003] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the Invention
[0004] The purpose of the utility model is to address the deficiencies of the prior art and thus provide an anti-corrosion structure for buried pipelines that is not prone to local protection function failure.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is: an anti-corrosion structure for buried pipelines, including a pipeline body, a cold wrap tape, and a gap protection tape. The cold wrap tape is spirally wound around the outer wall of the pipeline body. A spiral groove is formed on the outer wall of the pipeline body. The gap protection tape is laid in the spiral groove and coincides with the gap path between the cold wrap tapes. The side edges of the cold wrap tape overlap on the gap protection tape.
[0006] Based on the above, the pipeline body includes a steel pipe and a polyethylene anti-corrosion layer coated on the outer side of the steel pipe. The spiral groove is formed on the surface of the polyethylene anti-corrosion layer.
[0007] Based on the above, the two side edges of the gap protection tape are flush with the polyethylene anti-corrosion layer, and a raised portion is provided in the middle of the gap protection tape.
[0008] Based on the above, the raised portion on the gap protection tape is smoothly connected to the two side edges through a concave curved surface.
[0009] Based on the above, the gap protection tape is made of a polyethylene plastic tape.
[0010] The utility model has substantial features and progress compared with the prior art. Specifically, the utility model has the following advantages:
[0011] (1) By providing the gap protection belt, the gaps left during the winding of the cold-wrap tape can be blocked, so that the pipe body is completely physically isolated from the soil, thereby avoiding the failure of the local protection function and extending the anti-corrosion period; the setting of the polyethylene anti-corrosion layer further improves the anti-corrosion effect.
[0012] (2) The setting of the convex part makes it difficult for the cold-wrap tape to cross the boundary during the winding process, improving the winding uniformity. Description of the Drawings
[0013] Figure 1 is a schematic structural diagram of the anti-corrosion structure of the buried pipeline in the utility model.
[0014] Figure 2 is a partial enlarged view of the anti-corrosion structure of the buried pipeline in the utility model.
[0015] Figure 3 is a schematic cross-sectional structure diagram of the gap protection belt in the utility model.
[0016] In the figure: 1. Pipe body; 2. Cold-wrap tape; 3. Gap protection belt; 4. Spiral groove; 11. Steel pipe; 12. Polyethylene anti-corrosion layer; 31. Convex part; 32. Concave curved surface. Detailed Embodiments
[0017] The following further describes the technical solutions of the utility model in detail through specific embodiments.
[0018] As Figures 1-3 shown, an anti-corrosion structure of a buried pipeline includes a pipe body 1, a cold-wrap tape 2 and a gap protection belt 3. The cold-wrap tape 2 is spirally wound around the outer wall of the pipe body 1. A spiral groove 4 is formed on the outer wall of the pipe body 1. The gap protection belt 3 is laid in the spiral groove 4 and coincides with the gap path between the cold-wrap tapes 2. The side edges of the cold-wrap tape 2 overlap on the gap protection belt 3. Among them, the pipe body 1 specifically includes a steel pipe 11 and a polyethylene anti-corrosion layer 12 coated on the outside of the steel pipe 11. The spiral groove 4 is formed on the surface of the polyethylene anti-corrosion layer 12. The gap protection belt 3 is specifically made of a polyethylene plastic tape so as to be able to be used in the soil environment for a long time.
[0019] Working principle:
[0020] The polyethylene anti-corrosion layer 12 forms the first anti-corrosion protection, the cold-wrap tape 2 forms the second anti-corrosion protection. The arrangement of the gap protection tape 3 can block the gaps left during the winding process of the cold-wrap tape 2, completely physically isolate the pipe body 1 from the soil, thereby avoiding the failure of the local protection function and extending the anti-corrosion period.
[0021] To ensure no gaps, the two side edges of the gap protection tape 3 are flush with the polyethylene anti-corrosion layer 12. A convex portion 31 is provided in the middle of the gap protection tape 3, and the convex portion 31 on the gap protection tape 3 is smoothly connected to the two side edges through a concave curved surface 32; the setting of the convex portion 31 facilitates separating each turn of the cold-wrap tape 2, and it is not easy to cross the boundary during the winding process, so that the winding is more uniform. The setting of the concave curved surface 32 also makes the lap joint of the cold-wrap tape 2 smoother and not easy to come off, thus ensuring complete wrapping.
[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still can modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.
Claims
1. An anti-corrosion structure for buried pipelines, characterized in that: It includes a pipe body, a cold-wrapped tape and a gap protection tape. The cold-wrapped tape is spirally wound around the outer wall of the pipe body. A spiral groove is formed on the outer wall of the pipe body. The gap protection tape is laid in the spiral groove and coincides with the inter-tape gap path of the cold-wrapped tape. The side of the cold-wrapped tape overlaps on the gap protection tape.
2. The anti-corrosion structure of the buried pipeline according to claim 1, wherein: The pipe body includes a steel pipe and a polyethylene anti-corrosion layer coated on the outside of the steel pipe. The spiral groove is formed on the surface of the polyethylene anti-corrosion layer.
3. The anti-corrosion structure of the buried pipeline according to claim 2, characterized in that: Both sides of the gap protection tape are flush with the polyethylene anti-corrosion layer, and a convex portion is provided in the middle of the gap protection tape.
4. The anti-corrosion structure of the buried pipeline according to claim 3, characterized in that: The convex portion on the gap protection tape is smoothly connected to both sides by a concave curved surface.
5. The anti-corrosion structure of the buried pipeline according to any one of claims 1-4, characterized in that: The gap protection tape is made of a polyethylene plastic tape.