A cathodic protection device for buried natural gas pipelines

Abstract

This utility model discloses a cathodic protection device for buried natural gas pipelines, comprising a pipeline body, a sacrificial anode layer, and a cathodic protection structure. The sacrificial anode layer is wrapped around the pipeline body, and the cathodic protection structure is disposed on the sacrificial anode layer. The cathodic protection structure further includes an external intelligent power supply unit and a discharge unit, the external intelligent power supply unit being disposed on the sacrificial anode layer, and the discharge unit being disposed on the sacrificial anode layer. This utility model belongs to the field of pipeline cathodic protection technology, specifically referring to a cathodic protection device for buried natural gas pipelines. It effectively solves the problems of rapid anode material consumption, increased maintenance costs and workload, and insufficient protection in some areas of the pipeline due to uneven anode distribution or soil environmental differences, affecting the uniformity of the protection effect.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline cathodic protection technology, specifically referring to a cathodic protection device for buried natural gas pipelines. Background Technology

[0002] In natural gas transmission systems, buried pipelines, as the primary transport carriers, are constantly exposed to complex soil environments and are highly susceptible to electrochemical corrosion. Once a pipeline corrodes and perforates, it not only leads to natural gas leaks, causing energy waste and environmental pollution, but can also trigger serious safety accidents, threatening people's lives and property. Therefore, cathodic protection grounding devices for natural gas pipelines are necessary. These devices isolate the cathode of the natural gas pipeline from the external environment. Currently, in China, long-distance transportation of oil and natural gas uses steel pipelines, and mandatory cathodic protection of the pipeline layer is essential during pipeline laying to prevent corrosion and reduce its service life.

[0003] However, existing cathodic protection devices for buried natural gas pipelines use sacrificial anode cathodic protection to protect the pipeline. The anode material is consumed quickly, requiring frequent replacement of the anode, which increases maintenance costs and workload. At the same time, due to factors such as uneven anode distribution or differences in soil environment, some areas of the pipeline are not adequately protected, affecting the uniformity of the protection effect. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model proposes a cathodic protection device for buried natural gas pipelines. It effectively solves the problems of rapid consumption of anode materials and increased maintenance costs and workload caused by the sacrificial anode cathodic protection method used in buried natural gas pipeline cathodic protection devices. At the same time, due to factors such as uneven anode distribution or differences in soil environment, some areas of the pipeline are not adequately protected, which affects the uniformity of the protection effect.

[0005] The technical solution adopted by this utility model is as follows: The present utility model proposes a cathodic protection device for buried natural gas pipelines, including a pipeline body, a sacrificial anode layer and a cathodic protection structure. The sacrificial anode layer is wrapped around the pipeline body, and the cathodic protection structure is disposed on the sacrificial anode layer. The cathodic protection structure also includes an external intelligent power supply unit and a discharge unit. The external intelligent power supply unit is disposed on the sacrificial anode layer, and the discharge unit is disposed on the sacrificial anode layer.

[0006] The external intelligent power supply unit also includes a conductive copper sheet, an anode potential monitoring module, and a current control module. The conductive copper sheet is wrapped around the outside of the sacrificial anode layer. Wire 1 is electrically connected to the conductive copper sheet. The anode potential monitoring module is electrically connected to wire 1. Wire 2 is electrically connected to wire 1. The current control module is electrically connected to wire 2. Wire 3 is electrically connected at one end to the anode potential monitoring module and at the other end to the current control module. Wire 4 is electrically connected to the current control module. The photovoltaic panel is electrically connected to wire 4.

[0007] Preferably, the discharge unit further includes an auxiliary anode layer and a conductive pillar, wherein the auxiliary anode layer is snapped onto the outside of the sacrificial anode layer, and the conductive pillar is welded onto the outside of the auxiliary anode layer.

[0008] To better achieve the effect of supplementing current, the current control module is equipped with an energy storage unit and a discharge unit, and the anode potential monitoring module is equipped with a current sensor to intelligently detect and transmit the anode electron threshold signal.

[0009] To achieve cathodic protection more quickly, the sacrificial anode layer is made of magnesium-aluminum alloy, and the auxiliary anode layer and conductive pillar are made of high-silicon cast iron. The conductive pillar extends and inserts into the soil.

[0010] Furthermore, the sacrificial anode layer is uniformly fixed to the outer wall of the pipe using a clamp.

[0011] To achieve uniform protection of the cathode, the anode potential monitoring module and the current control module are installed in groups at regular intervals along the pipeline to form distributed monitoring nodes.

[0012] The beneficial effects of this utility model using the above structure are as follows: The cathodic protection device for buried natural gas pipelines proposed in this solution uses a sacrificial anode material as the sacrificial anode layer for cathodic protection. At the same time, the anode potential monitoring module monitors the anode electrons inside the pipeline body in real time through wire one. When a local increase in cathodic protection potential occurs, the cathodic protection potential signal is transmitted through wire three. Then, the current control module applies current to the sacrificial anode layer on the conductive copper sheet through wire two. At this time, the current is introduced into the soil through the conductive column on the auxiliary anode layer, so that the pipeline body is always in a cathodic state, protecting the pipeline, avoiding local corrosion, and improving the uniformity of the protection effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a cathodic protection device for buried natural gas pipelines proposed in this utility model;

[0014] Figure 2This is a schematic diagram of the cathodic protection device for buried natural gas pipelines proposed in this utility model from another perspective.

[0015] Figure 3 This is a cross-sectional structural schematic diagram of a cathodic protection device for buried natural gas pipelines proposed in this utility model;

[0016] Figure 4 This is another cross-sectional structural schematic diagram of a cathodic protection device for buried natural gas pipelines proposed in this utility model.

[0017] The components include: 1. main body of the conveying pipeline; 2. sacrificial anode layer; 3. cathodic protection structure; 4. external intelligent power supply unit; 5. discharge unit; 6. conductive copper sheet; 7. wire one; 8. anode potential monitoring module; 9. wire two; 10. current control module; 11. wire three; 12. wire four; 13. photovoltaic panel; 14. auxiliary anode layer; and 15. conductive column.

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1 , Figure 2 and Figure 4 As shown, the present invention proposes a cathodic protection device for buried natural gas pipelines, comprising a pipeline body 1, a sacrificial anode layer 2, and a cathodic protection structure 3. The sacrificial anode layer 2 is wrapped around the pipeline body 1 and is made of magnesium-aluminum alloy. The sacrificial anode layer 2 is uniformly fixed to the outer wall of the pipeline by clamps. The cathodic protection structure 3 is disposed on the sacrificial anode layer 2. The cathodic protection structure 3 also includes an external intelligent power supply unit 4 and a discharge unit 5. The external intelligent power supply unit 4 and the discharge unit 5 are disposed on the sacrificial anode layer 2.

[0021] The additional intelligent power supply unit 4 also includes a conductive copper sheet 6, an anode potential monitoring module 8, and a current control module 10. The conductive copper sheet 6 is wrapped around the outside of the sacrificial anode layer 2. Wire 1 7 is electrically connected to the conductive copper sheet 6. The anode potential monitoring module 8 is electrically connected to wire 1 7. The anode potential monitoring module 8 is equipped with a current sensor that intelligently detects and transmits the anode electron threshold signal. Wire 2 9 is electrically connected to wire 1 7. The current control module 10 is electrically connected to wire 2 9. The current control module 10 is equipped with an energy storage unit and a discharge unit. The anode potential monitoring module 8 and the current control module 10 are installed at regular intervals along the pipeline to form a distributed monitoring node. Wire 3 11 is electrically connected at one end to the anode potential monitoring module 8 and at the other end to the current control module 10. Wire 4 12 is electrically connected to the current control module 10. The photovoltaic panel 13 is electrically connected to wire 4 12.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, the discharge unit 5 also includes an auxiliary anode layer 14 and a conductive post 15. The auxiliary anode layer 14 is snapped onto the outside of the sacrificial anode layer 2, and the conductive post 15 is welded onto the outside of the auxiliary anode layer 14. The auxiliary anode layer 14 and the conductive post 15 are made of high silicon cast iron material, and the conductive post 15 extends into the soil.

[0023] In practical use, data analysis software and a monitoring platform are installed in the remote monitoring center, connecting the anode potential monitoring module 8 and the current control module 10 to ensure real-time reception and processing of data sent by distributed monitoring nodes. This enables intelligent power management and control, achieving uniform cathodic protection. The sacrificial anode layer 2 releases electrons in real-time on the outside of the main body 1 of the conveying pipeline for cathodic protection. Simultaneously, to prevent rapid consumption of the sacrificial anode layer 2, an external current is introduced from the current control module 10 via wire 2 9 to achieve stable electron release, reducing the consumption of the sacrificial anode layer 2 material and avoiding frequent replacements. Meanwhile, the anode potential monitoring module 8 is connected via wire 1 7... The copper sheet 6 receives real-time changes in the cathodic protection potential on the main body 1 of the pipeline inside the sacrificial anode layer 2. Then, it transmits the signal of the increase in cathodic protection potential to the current control module 10 through wire 3 11. At this time, the current control module 10, relying on data analysis software and monitoring platform, automatically adjusts the output current and outputs the current to the sacrificial anode layer 2 on the conductive copper sheet 6 through wire 2 9, thereby achieving cathodic protection. In addition, multiple sets of anode potential monitoring modules 8 and current control module 10 are evenly arranged and controlled independently, achieving a uniform protection effect for the main body 1 of the pipeline. The above is the entire process of using the cathodic protection device for buried natural gas pipelines.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] 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.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A cathodic protection apparatus for a buried natural gas pipeline, characterized by: The system includes a main body of a conveying pipeline (1), a sacrificial anode layer (2), and a cathodic protection structure (3). The sacrificial anode layer (2) is wrapped around the main body of the conveying pipeline (1), and the cathodic protection structure (3) is disposed on the sacrificial anode layer (2). The cathodic protection structure (3) also includes an external intelligent power supply unit (4) and a discharge unit (5). The external intelligent power supply unit (4) is disposed on the sacrificial anode layer (2), and the discharge unit (5) is disposed on the sacrificial anode layer (2). The external intelligent power supply unit (4) also includes a conductive copper sheet (6), an anode potential monitoring module (8), and a current control module (10). The conductive copper sheet (6) is wrapped around the outside of the sacrificial anode layer (2). Wire 1 (7) is electrically connected to the conductive copper sheet (6). The anode potential monitoring module (8) is electrically connected to the wire 1 (7). Wire 2 (9) is electrically connected to the wire 1 (7). The current control module (10) is electrically connected to the wire 2 (9). One end of wire 3 (11) is electrically connected to the anode potential monitoring module (8), and the other end is electrically connected to the current control module (10). Wire 4 (12) is electrically connected to the current control module (10). The photovoltaic panel (13) is electrically connected to wire 4 (12).

2. A cathodic protection apparatus for a buried natural gas pipeline according to claim 1, characterized in that: The discharge unit (5) further includes an auxiliary anode layer (14) and a conductive post (15). The auxiliary anode layer (14) is snapped onto the outside of the sacrificial anode layer (2), and the conductive post (15) is welded onto the outside of the auxiliary anode layer (14).

3. A cathodic protection apparatus for a buried natural gas pipeline as defined in claim 2, wherein: The current control module (10) is equipped with an energy storage unit and a discharge unit (5), and the anode potential monitoring module (8) is equipped with a current sensor to intelligently detect and transmit the anode electron threshold signal.

4. A cathodic protection apparatus for a buried natural gas pipeline according to claim 3, characterized in that: The sacrificial anode layer (2) is made of magnesium-aluminum alloy, and the auxiliary anode layer (14) and the conductive pillar (15) are made of high-silicon cast iron. The conductive pillar (15) extends into the soil.

5. A cathodic protection apparatus for a buried natural gas pipeline according to claim 4, characterized in that: The sacrificial anode layer (2) is uniformly fixed to the outer wall of the pipe by a clamp.

6. A cathodic protection apparatus for a buried natural gas pipeline according to claim 5, characterized in that: The anode potential monitoring module (8) and the current control module (10) are installed at regular intervals along the pipeline to form a distributed monitoring node.

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