Cathodic protection device and system for steel pipelines in a courtyard gallery

Abstract

The utility model discloses a kind of yard corridor steel pipeline cathodic protection device and system, it is related to cathodic protection technical field, including insulating protection plate, auxiliary anode body and connecting element, the auxiliary anode body is located at the first side of the insulating protection plate, and the auxiliary anode body with the insulating protection plate between through the connecting element can be detachably connected, the second side of the insulating protection plate is buried metal pipeline, and the insulating protection plate is located between the auxiliary anode body and buried metal pipeline, the insulating protection plate is parallel with buried metal pipeline, and isolation gap is equipped between the insulating protection plate and buried metal pipeline.The utility model can avoid the occurrence of hydrogen evolution phenomenon that the potential of buried metal pipeline anode vicinity is over negative, prolong the service life of buried metal pipeline.

Description

Technical Field

[0001] This utility model relates to the field of cathodic protection technology, and in particular to a cathodic protection device and system for steel pipelines in courtyard corridors. Background Technology

[0002] In today's living environment, cathodic protection of gas pipelines in residential communities is becoming increasingly important. In a cathodic protection system, an external electron supply polarizes the entire surface of the gas pipeline into a cathode, transforming a localized area that was originally an anode into a protected cathode. For example, the sacrificial anode method uses the corrosion and dissolution of materials such as magnesium and zinc to provide electrons to the gas pipeline, causing the overall potential of the gas pipeline to shift negatively, achieving an anti-corrosion effect. This electrochemical approach prevents corrosion of gas pipelines, thereby ensuring the safety of buried steel pipelines, guaranteeing safe gas supply to the community, and ensuring the normal lives of residents.

[0003] However, commercial and residential areas have relatively limited space compared to the open natural environment, and their underground pipelines are more densely packed. This can lead to the auxiliary anodes being too close to the underground pipelines or even in direct contact when they are installed. Consequently, the auxiliary anodes may continuously discharge after being energized, resulting in hydrogen evolution and causing pipeline cracking. Utility Model Content

[0004] The purpose of this utility model is to provide a cathodic protection device and system for steel pipelines in courtyard corridors, so as to solve the problems existing in the prior art, avoid hydrogen evolution caused by excessively negative potential near the anode of buried metal pipelines, and extend the service life of buried metal pipelines.

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a cathodic protection device for steel pipelines in courtyard corridors, including an insulating protection plate, an auxiliary anode body, and a connecting element. The auxiliary anode body is located on the first side of the insulating protection plate, and the auxiliary anode body and the insulating protection plate are detachably connected through the connecting element. The second side of the insulating protection plate is a buried metal pipeline, and the insulating protection plate is located between the auxiliary anode body and the buried metal pipeline. The insulating protection plate is parallel to the buried metal pipeline, and an isolation gap is provided between the insulating protection plate and the buried metal pipeline.

[0006] Preferably, the cross-sectional area of ​​the insulating protective plate is larger than the cross-sectional area of ​​the auxiliary anode body, and the outer edge of the insulating protective plate extends beyond the outer edge of the auxiliary anode body.

[0007] Preferably, the auxiliary anode body is a cylinder.

[0008] Preferably, the auxiliary anode body is a cuboid.

[0009] Preferably, there are multiple connecting elements, and the multiple connecting elements are arranged sequentially along the length direction of the auxiliary anode body.

[0010] Preferably, the connecting element includes a buckle and a retaining ring, one end of the retaining ring and the buckle are both connected to the first side of the insulating protective plate, and the other side of the retaining ring can bypass the auxiliary anode body and be detachably connected to the buckle.

[0011] Preferably, the connecting element is a binding strap, which can be wrapped around the outer periphery of the auxiliary anode body and the insulating protective plate.

[0012] Preferably, the isolation gap is filled with soil and stone.

[0013] Preferably, the cathodic protection device for steel pipelines in courtyard corridors provided by this utility model further includes a supporting load-bearing body, which is detachably installed on the first side of the insulating protection plate, and the supporting load-bearing body is used to contact the side of the auxiliary anode body.

[0014] This utility model also provides a cathodic protection system for steel pipelines in courtyard corridors, including buried pipelines and the cathodic protection device for steel pipelines in courtyard corridors as described in any of the above technical solutions.

[0015] The present invention achieves the following technical advantages over the prior art: This utility model provides a cathodic protection device and system for steel pipelines in courtyard corridors, including an insulating protection plate, an auxiliary anode body, and connecting elements. The auxiliary anode body is located on the first side of the insulating protection plate, and the auxiliary anode body and the insulating protection plate are detachably connected through the connecting elements. The second side of the insulating protection plate is a buried metal pipeline, and the insulating protection plate is located between the auxiliary anode body and the buried metal pipeline. The insulating protection plate isolates the auxiliary anode body and the buried metal pipeline, preventing them from being too close or even in direct contact due to the limited space. This also prevents the accumulation of ions due to continuous discharge of the auxiliary anode body, resulting in a negative polarity. It prevents hydrogen evolution due to excessively negative potential near the anode during the protection period of the buried metal pipeline, thereby preventing accelerated aging of the anti-corrosion coating of the protected buried metal pipeline and preventing cracking of the buried metal pipeline caused by the accumulation of hydrogen inside the pipeline. This extends the service life of the buried metal pipeline, prevents gas leakage, and improves safety. The insulating protection plate is parallel to the buried metal pipeline, and an isolation gap is provided between the insulating protection plate and the buried metal pipeline. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional view of the cathodic protection device for steel pipelines in the courtyard corridor in Example 1; Figure 2 This is a top view of the cathodic protection device for steel pipelines in the courtyard corridor in Example 1; Figure 3 This is a side view of the cathodic protection system for steel pipelines in the courtyard corridor in Example 2; Figure 4 This is a top view of the cathodic protection system for steel pipelines in the courtyard corridor in Example 2; Figure 5 This is a schematic diagram of the working principle of the cathodic protection device for steel pipelines in the courtyard corridor in Example 1 (arrows represent the direction of current flow). In the diagram: 1-Auxiliary anode body, 2-Insulation protection plate, 3-Supporting load-bearing body, 4-Clamping ring, 5-Snap fastener, 6-Buried metal pipe. 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] The purpose of this invention is to provide a cathodic protection device and system for steel pipelines in courtyard corridors, in order to solve the problems existing in the prior art, avoid hydrogen evolution caused by excessively negative potential near the anode of buried metal pipelines, and extend the service life of buried metal pipelines.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 like Figures 1-5As shown, this embodiment provides a cathodic protection device for steel pipelines in courtyard corridors, particularly suitable for confined spaces. It includes an insulating protective plate 2, an auxiliary anode body 1, and connecting elements. The auxiliary anode body 1 is located on the first side of the insulating protective plate 2, and the auxiliary anode body 1 and the insulating protective plate 2 are detachably connected via connecting elements. The second side of the insulating protective plate 2 is a buried metal pipe 6, and the insulating protective plate 2 is located between the auxiliary anode body 1 and the buried metal pipe 6. Thus, the insulating protective plate 2 isolates the auxiliary anode body 1 and the buried metal pipe 6, preventing contact between the auxiliary anode body 1 and the buried metal pipe due to the limited space. The distance between the underground metal pipeline 6 and the pipeline 6 is too close or even in direct contact, thereby avoiding the accumulation of ions due to the continuous discharge of the auxiliary anode body 1, which would cause an extremely negative phenomenon. This prevents hydrogen evolution due to excessively negative potential near the anode during the protection period of the underground metal pipeline 6, thus preventing accelerated aging of the anti-corrosion coating of the protected underground metal pipeline 6 and preventing cracking of the underground metal pipeline 6 caused by the accumulation of hydrogen inside the underground metal pipeline 6, extending the service life of the underground metal pipeline 6, preventing gas leakage, and improving safety. The insulating protection plate 2 is parallel to the underground metal pipeline 6, and an isolation gap is provided between the insulating protection plate 2 and the underground metal pipeline 6.

[0022] Specifically, the cross-sectional area of ​​the insulating protection plate 2 is larger than that of the auxiliary anode body 1, and the outer edge of the insulating protection plate 2 extends beyond the outer edge of the auxiliary anode body 1, thereby ensuring that the insulating protection plate 2 can provide effective insulation, so that the final current flow direction is as follows: Figure 5 As shown.

[0023] As a preferred embodiment, the auxiliary anode body 1 is a cylinder.

[0024] As another preferred embodiment, the auxiliary anode body 1 is a cuboid.

[0025] However, in this embodiment, the specific shape of the auxiliary anode body 1 is not limited to the above-mentioned limitations. Those skilled in the art can also make adaptive adjustments to the specific shape of the auxiliary anode body 1 according to actual needs.

[0026] Multiple connecting elements are arranged sequentially along the length of the auxiliary anode body 1, thereby achieving stability in fixing the auxiliary anode body 1 and preventing it from shaking during actual application. In this embodiment, two connecting elements can be used, with each element positioned close to one end of the auxiliary anode body 1. This fixes the two ends of the connecting elements, improving the stability of the auxiliary anode body 1.

[0027] As a preferred embodiment, the connecting element includes a buckle 5 and a retaining ring 4. One end of the retaining ring 4 and the buckle 5 are both connected to the first side of the insulating protection plate 2. The other side of the retaining ring 4 can bypass the auxiliary anode body 1 and be detachably connected to the buckle 5. Thus, the retaining ring 4 limits the circumferential movement of the auxiliary anode body 1 and ensures that the retaining ring 4 applies a certain clamping force to the auxiliary anode body 1 to prevent displacement of the auxiliary anode body 1. Furthermore, the installation and disassembly are more convenient.

[0028] As another preferred embodiment, the connecting element is a binding strap. The binding strap can be wrapped around the outer periphery of the auxiliary anode body 1 and the insulating protection plate 2. When the auxiliary anode body 1 is placed on the first side of the insulating protection plate 2, the binding strap is used to wrap the two together to bind the auxiliary anode body 1 and the insulating protection plate 2 together. Alternatively, one end of the binding strap can be fixed to the first side of the insulating protection plate 2, and the auxiliary anode body 1 can be fixed to the insulating protection plate 2 by simply wrapping the binding strap around the auxiliary anode body 1 and fixing the other end of the binding strap.

[0029] However, the specific structural design of the connecting element in this embodiment is not limited to the above limitations. Those skilled in the art can also make adjustments according to actual needs. For example, in order to ensure the connection stability between the insulating protection plate 2 and the auxiliary anode body 1, a tray can be added to the first side of the insulating protection plate 2, and a stable connection can be achieved by installing the auxiliary anode body 1 on the tray.

[0030] The isolation gaps are filled with soil and rocks to improve stability.

[0031] The cathodic protection device for steel pipelines in the courtyard corridor in this embodiment also includes a support 3. The support 3 can be detachably installed on the first side of the insulating protection plate 2, and the support 3 is used to contact the side of the auxiliary anode 1, thereby supporting the auxiliary anode 1 and preventing collapse.

[0032] In this embodiment, the cathodic protection device for steel pipelines in the courtyard corridor is made of insulating material, except for the auxiliary anode body 1.

[0033] The specific installation steps for the cathodic protection device for steel pipelines in the courtyard corridor in this embodiment are as follows: S1. Based on the site conditions, measure the space size, determine the dimensions of the insulation protection board 2, and use insulating materials to make the insulation protection board 2; S2. A tray for supporting the auxiliary anode body 1 is fixedly installed on the first side of the insulating protection plate 2. Connecting elements, such as clips 5 and retaining rings 4, are installed on the tray. S3. Using the retaining ring 4 or other fixing structures (such as fixing straps), fix the auxiliary anode body 1 on the tray of the insulating protection plate 2 to complete the assembly of the auxiliary anode body 1.

[0034] Furthermore, it is necessary to ensure that the cathodic protection device for the steel pipeline of the courtyard corridor in this embodiment is buried at the same depth as the underground metal pipeline 6 (e.g., gas pipeline), and the insulating protection plate 2 needs to maintain a certain gap with the gas pipeline. The cathodic protection device for the steel pipeline of the courtyard corridor in this embodiment is fixed in position with soil and stones, and is ensured to be parallel to the underground metal pipeline 6.

[0035] Example 2 like Figures 1-5 As shown, this embodiment provides a cathodic protection system for steel pipelines in courtyard corridors, including an underground pipeline 6 and the cathodic protection device for steel pipelines in courtyard corridors as described in Embodiment 1.

[0036] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cathodic protection device for steel pipelines in courtyard corridors, characterized in that: The device includes an insulating protective plate, an auxiliary anode body, and a connecting element. The auxiliary anode body is located on a first side of the insulating protective plate, and the auxiliary anode body and the insulating protective plate are detachably connected through the connecting element. The second side of the insulating protective plate is a buried metal pipe, and the insulating protective plate is located between the auxiliary anode body and the buried metal pipe. The insulating protective plate is parallel to the buried metal pipe, and an isolation gap is provided between the insulating protective plate and the buried metal pipe.

2. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: The cross-sectional area of ​​the insulating protective plate is larger than that of the auxiliary anode body, and the outer edge of the insulating protective plate extends beyond the outer edge of the auxiliary anode body.

3. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: The auxiliary anode body is cylindrical.

4. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: The auxiliary anode body is a cuboid.

5. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: The connecting elements are multiple, and the multiple connecting elements are arranged sequentially along the length direction of the auxiliary anode body.

6. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: The connecting element includes a buckle and a retaining ring. One end of the retaining ring and the buckle are both connected to the first side of the insulating protective plate. The other side of the retaining ring can bypass the auxiliary anode body and can be detachably connected to the buckle.

7. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: The connecting element is a binding strap, which can be wrapped around the outer periphery of the auxiliary anode body and the insulating protective plate.

8. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: The isolation gap is filled with soil and rocks.

9. The cathodic protection device for steel pipelines in courtyard corridors according to claim 1, characterized in that: It also includes a support bearing that is detachably mounted on a first side of the insulating protective plate and is used to contact the side of the auxiliary anode body.

10. A cathodic protection system for steel pipelines in courtyard corridors, characterized in that: Includes buried metal pipes and cathodic protection devices for steel pipelines in courtyard corridors as described in any one of claims 1-9.

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