Cathode protection system with built-in pipeline

Abstract

The utility model relates to a pipeline built-in cathode protection system, which comprises a pipeline, a constant potential rectifier, a loop cable and a protection structure, one end of the loop cable is welded with the pipeline, the other end of the loop cable is connected with the constant potential rectifier, one end of the protection structure is arranged in the pipeline, the other end of the protection structure is connected with the constant potential rectifier, and the protection structure comprises an electrode body; the flange assembly comprises a base flange and a gland flange, the base flange is configured to penetrate out from the interior of the pipeline to the exterior, the gland flange is located in the pipeline and used for being matched with the base flange to fix the electrode body, the base flange is provided with a hollow cavity for an electrode cable to penetrate through, and one end of the electrode cable is connected with the electrode body; the pipeline cathode protection effect can be achieved, installation, overhaul and replacement of the electrode body can be conducted in the pipeline, and the problem that an inspection well needs to be arranged for installation, overhaul and replacement of an electrode of an impressed current cathode protection system on the inner wall of the buried pipeline is solved.

Description

Technical Field

[0001] This utility model relates to the field of cathodic protection technology, specifically to a pipeline-embedded cathodic protection system. Background Technology

[0002] The buried pipelines (equipment) employ an impressed current cathodic protection system, requiring backfilling for the installation of the pipelines (equipment) and corresponding cathodic protection electrodes (auxiliary anode and reference electrode). For electrode installation and subsequent maintenance and replacement, a manhole is typically prefabricated at each electrode installation location, resulting in significant civil engineering work and a large footprint for the manholes. Furthermore, due to the deep burial of the pipelines (equipment) and electrodes, groundwater seepage into the manholes poses a risk of collapse, and the limited space within the plant area prevents the provision of numerous manholes, thus hindering the implementation of the impressed current system.

[0003] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Utility Model Content

[0004] In view of the above, this application provides a pipeline-embedded cathodic protection system to solve at least one problem existing in the background art, including a pipeline, a potentiostat, a loop cable and a protection structure. One end of the loop cable is welded to the pipeline and the other end is connected to the potentiostat. One end of the protection structure is disposed inside the pipeline and the other end is connected to the potentiostat.

[0005] The protective structure includes:

[0006] The electrode body is located inside the pipe;

[0007] A flange assembly includes a base flange and a gland flange. The base flange is configured to extend from the inside of a pipe to the outside so that a portion of the base flange abuts against the inner wall of the pipe. The gland flange is located inside the pipe and is used to cooperate with the base flange to fix the electrode body. The base flange has a hollow cavity for an electrode cable to pass through. One end of the electrode cable is connected to the electrode body, and the other end is connected to a potentiostat.

[0008] Optionally, the above-described pipeline-embedded cathodic protection system further includes a sealing assembly located above the base flange, mating with the base flange, and having a perforation for the electrode cable to pass through.

[0009] Optionally, in the above-mentioned pipeline-embedded cathodic protection system, the sealing assembly includes a first mating part, a second mating part, a third mating part, and a sealing ring that mate with the base flange. The first mating part mates with the base flange and has a first groove. The second mating part has a first protrusion and a second groove that are adapted to the first groove. The first protrusion engages with the first groove. The third mating part has a second protrusion that engages with the second groove. The sealing ring is located between the second protrusion and the second groove. The through hole passes through the first mating part, the second mating part, and the third mating part in sequence.

[0010] Optionally, in the above-described pipeline-embedded cathodic protection system, the electrode cable includes a first electrode cable and a second electrode cable connected to the first electrode cable. The first electrode cable is adapted to be connected to the electrode body, and the second electrode cable is adapted to be connected to the potentiostat.

[0011] Optionally, in the above-mentioned pipeline-embedded cathodic protection system, the protection structure further includes a first sealing connector located within the hollow cavity, the first sealing connector being used to connect the first electrode cable and the second electrode cable.

[0012] Optionally, in the above-described pipeline-embedded cathodic protection system, the protection structure further includes a second sealing connector for connecting the first electrode cable to the electrode body.

[0013] Optionally, in the above-described pipeline-embedded cathodic protection system, the second sealing connector has a plug portion and a plug hole provided on the plug portion, and the first electrode cable is adapted to pass through the plug hole for connection.

[0014] Optionally, in the above-mentioned pipeline-embedded cathodic protection system, the length of the first electrode cable is 30-40cm.

[0015] Optionally, the above-described pipeline-embedded cathodic protection system further includes fasteners and elastic gaskets for connecting the base flange and the gland flange.

[0016] Optionally, in the above-mentioned pipeline-embedded cathodic protection system, the potentiostat includes a housing, a loop connection position and an electrode connection position located inside the housing, the loop cable is connected to the loop connection position, and the electrode cable is connected to the electrode connection position.

[0017] Compared with the prior art, this application has the following advantages: the electrode body is fixed in the pipeline through the flange base and the gland base, and the electrode body is connected to the external potentiostat through the electrode cable. This can achieve the function of cathodic protection of the pipeline. Moreover, the installation, maintenance and replacement of the electrode body can be carried out inside the pipeline. This avoids the problem that the electrodes of the buried pipeline inner wall impressed current cathodic protection system need to be installed in the preparation inspection well for installation, maintenance and replacement. No excavation is required, which is safe, convenient, labor-saving and saves site space. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a pipeline-embedded cathodic protection system according to the present invention;

[0019] Figure 2 for Figure 1 The diagram shows the structural schematic of the heavy protection structure of the protection system.

[0020] Figure 3 for Figure 2 A magnified view of a portion of the image.

[0021] Figure Descriptions: 1-Pipe; 2-Potentialistometer; 3-Circuit Cable; 4-Protective Structure; 5-Electrode Body; 6-Flange Assembly; 7-Base Flange; 8-Gland Flange; 9-Hollow Cavity; 10-Electrode Cable; 11-Box; 12-Circuit Connection Position; 13-Electrode Connection Position; 14-Fastener; 15-Plug; 16-Sealing Assembly; 17-First Connecting Part; 18-Second Connecting Part; 19-Third Connecting Part; 20-Sealing Ring; 21-Perforation; 22-First Groove; 23-First Protrusion; 24-Second Groove; 25-Second Protrusion; 26-First Electrode Cable; 27-Second Electrode Cable; 28-First Sealing Connection; 29-Second Sealing Connection. Detailed Implementation

[0022] The exemplary embodiments disclosed in this application will now be described in more detail. Numerous specific details are set forth in the following description to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0023] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0024] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used here for convenience to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of devices in use and operation.

[0025] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “ / the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “compose” and / or “comprising,” when used in this specification, identify the presence of features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0026] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.

[0027] Please refer to Figures 1-3As shown in the preferred embodiment of this application, a pipeline-embedded cathodic protection system is used to provide protective current to mitigate pipeline corrosion and achieve cathodic protection. The protection system includes a pipeline 1, a potentiostat 2, a loop cable 3, and a protective structure 4. One end of the loop cable 3 is welded to the pipeline 1, and the other end is connected to the potentiostat 2. One end of the protective structure 4 is disposed inside the pipeline 1, and the other end is connected to the potentiostat 2.

[0028] The potentiostat 2 includes a housing 11, a loop connection position 12 and an electrode connection position 13 located within the housing 11, a loop cable 3 connected to the loop connection position 12, and an electrode cable 10 led out from the protective structure 4 and connected to the electrode connection position 13. It should be noted that in this embodiment, the pipe 1 is located in seawater or soil, while the potentiostat 2 is located on the ground.

[0029] In this embodiment, the protective structure 4 includes an electrode body 5 and a flange assembly 6 located inside the pipe 1. The flange assembly 6 includes a base flange 7 and a gland flange 8. The base flange 7 is configured to extend from the inside of the pipe 1 to the outside, such that a portion of the base flange 7 abuts against the inner wall of the pipe 1. The gland flange 8 is located inside the pipe 1 and is used to cooperate with the base flange 7 to fix the electrode body 5. The base flange 7 has a hollow cavity 9 through which an electrode cable 10 passes. One end of the electrode cable 10 is connected to the electrode body 5, and the other end is connected to the potentiostat 2. The hollow cavity 9 can also be used for connecting and storing the electrode cable 10 within it.

[0030] Understandably, by fixing the electrode body 5 inside the pipe 1 through the base flange 7 and the gland flange 8, the electrode body 5 can be installed, inspected and replaced directly inside the pipe 1. There is no need to set up a separate inspection well for installing, inspecting and replacing the electrode body 5, and it does not occupy ground area, thus reducing the difficulty of construction.

[0031] Understandably, the base flange 7 and the gland flange 8 not only make the entire installation process simple and quick, but also ensure the stability of the electrode body 5, prevent the electrode body 5 from loosening, and ensure a leak-proof seal.

[0032] It should be noted that, in this embodiment, the protective structure 4 also includes fasteners 14 and elastic pads for connecting the base flange 7 and the gland flange 8. By setting the elastic pads, buffering can be provided when the base flange 7 and the gland flange 8 are connected to fix the electrode body 5, so as to prevent excessive strength from damaging the electrode body 5 and to ensure connection stability.

[0033] Furthermore, the protective structure 4 also includes a sealing assembly 16, which is located above the base flange 7, mats with the base flange 7, and has a through hole 21 for the electrode cable 10 to pass through, so that the electrode cable 10 can pass through and connect to the electrode connection position 13.

[0034] Furthermore, the sealing assembly 16 includes a first mating member 17, a second mating member 18, a third mating member 19, and a sealing ring 20 that mate with the base flange 7. The first mating member 17 mates with the base flange 7 and has a first groove 22. The second mating member 18 has a first protrusion 23 and a second groove 24 that are adapted to the first groove 22. The first protrusion 23 engages with the first groove 22. The third mating member 19 has a second protrusion 25 that engages with the second groove 24. The sealing ring 20 is located between the second protrusion 25 and the second groove 24. The through hole 21 passes through the first mating member 17, the second mating member 18, and the third mating member 19 in sequence to facilitate the entry and exit of cables.

[0035] In this embodiment, the electrode cable 10 includes a first electrode cable 26 and a second electrode cable 27 connected to the first electrode cable 26. The connection point of the first electrode cable 26 and the second electrode cable 27 is located in the hollow cavity. The hollow cavity facilitates the storage and connection of the first electrode cable 26 and the second electrode cable 27. The first electrode cable 26 is adapted to be connected to the electrode body 5, and the second electrode cable 27 is adapted to be connected to the potentiostat 2.

[0036] Understandably, the segmented design of the electrode cable 10 facilitates the installation and maintenance of the protection structure 4. For example, since the electrode body 5 and the first electrode cable 26 are prefabricated structures that have been sealed and connected before leaving the factory, when replacing or repairing the electrode body 5, the first electrode cable 26 located in the hollow cavity can be directly separated from the second electrode cable 27, and then the first electrode cable 26 and the electrode body 5 connected to it can be disassembled together for replacement or repair without disassembling the entire protection structure, thus achieving rapid replacement.

[0037] Furthermore, the protective structure 4 also includes a first sealing connector 28 located within the hollow cavity 9. The first sealing connector 28 is used to connect the first electrode cable 26 and the second electrode cable 27, thereby ensuring the stability and sealing of the connection between the first electrode cable 26 and the second electrode cable 27. The first sealing connector 28 can be manifested as heat shrink tubing or cable sealing insulating tape.

[0038] Furthermore, the protective structure 4 also includes a second sealing connector 29, which is used to connect the first electrode cable 26 to the electrode body 5, thereby ensuring the firmness and sealing of the connection between the first electrode cable 26 and the electrode body 5. The second sealing connector 29 can be manifested as a sealing terminal and sealing insulating tape (the electrode body has already been connected and sealed before leaving the factory).

[0039] Furthermore, the second sealing connector 29 has a plug portion and a plug hole provided on the plug portion, and the first electrode cable 26 is provided with a plug 15 suitable for connecting through the plug hole, so as to realize the quick connection between the electrode body 5 and the first electrode cable and simplify the installation process.

[0040] It should be noted that in this embodiment, the length of the first electrode cable 26 is 30-40cm.

[0041] In summary, the installation process of the protective structure is as follows: First, the electrode body is fixed to the gland base through the flange base. Then, the base flange extends from the inside to the outside through the opening of the pipe, so that the base flange can abut against the bottom wall of the pipe. The connection is then welded to ensure sealing. Next, the first electrode cable is connected to the second electrode cable, and the second electrode cable is passed through the through hole and connected to the potentiostat.

[0042] Furthermore, the specific structure and usage of the potentiostat 2 can be referenced from conventional potentiostat 2, and are not limited here. In actual use, the potentiostat 2 is typically configured with two loop connection positions and two electrode connection positions; there are two loop cables, one for cathode and one for zero cathode, which connect to the pipeline and to their respective loop connection positions. There are two electrode cables, and two electrode bodies, one for auxiliary anode and one for reference electrode. The auxiliary anode and reference electrode are mounted on the pipeline through their respective flange assemblies and connected to their respective electrode connection positions through their respective electrode cables. Regarding the specific materials of the auxiliary anode and reference electrode, existing technology can be referenced, and will not be limited or elaborated here.

[0043] The above is only one specific implementation of this application, and any other improvements made based on the concept of this application shall be considered within the scope of protection of this application.

Claims

1. A pipeline-embedded cathodic protection system, characterized in that, It includes a pipe, a potentiostat, a loop cable, and a protective structure. One end of the loop cable is welded to the pipe, and the other end is connected to the potentiostat. One end of the protective structure is installed inside the pipe, and the other end is connected to the potentiostat. The protective structure includes: The electrode body is located inside the pipe; A flange assembly includes a base flange and a gland flange. The base flange is configured to extend from the inside of a pipe to the outside so that a portion of the base flange abuts against the inner wall of the pipe. The gland flange is located inside the pipe and is used to cooperate with the base flange to fix the electrode body. The base flange has a hollow cavity for an electrode cable to pass through. One end of the electrode cable is connected to the electrode body, and the other end is connected to a potentiostat.

2. The pipeline-embedded cathodic protection system according to claim 1, characterized in that, The protective structure also includes a sealing assembly located above the base flange, mating with the base flange, and having a through-hole for the electrode cable to pass through.

3. The pipeline-embedded cathodic protection system according to claim 2, characterized in that, The sealing assembly includes a first mating part, a second mating part, a third mating part, and a sealing ring that mate with the base flange. The first mating part mates with the base flange and has a first groove. The second mating part has a first protrusion and a second groove that are adapted to the first groove. The first protrusion engages with the first groove. The third mating part has a second protrusion that engages with the second groove. The sealing ring is located between the second protrusion and the second groove. The through hole passes through the first mating part, the second mating part, and the third mating part in sequence.

4. The pipeline-embedded cathodic protection system according to claim 1, characterized in that, The electrode cable includes a first electrode cable and a second electrode cable connected to the first electrode cable. The first electrode cable is adapted to be connected to the electrode body, and the second electrode cable is adapted to be connected to the potentiostat.

5. The pipeline-embedded cathodic protection system according to claim 4, characterized in that, The protective structure also includes a first sealing connector located within the hollow cavity, the first sealing connector being used to connect the first electrode cable and the second electrode cable.

6. The pipeline-embedded cathodic protection system according to claim 4, characterized in that, The protective structure also includes a second sealing connector for connecting the first electrode cable to the electrode body.

7. The pipeline-embedded cathodic protection system according to claim 6, characterized in that, The second sealing connector has a plug portion and a plug hole provided on the plug portion, and the first electrode cable is adapted to be connected through the plug hole.

8. The pipeline-embedded cathodic protection system according to claim 4, characterized in that, The length of the first electrode cable is 30-40cm.

9. The pipeline-embedded cathodic protection system according to claim 1, characterized in that, The protective structure also includes fasteners and elastic gaskets for connecting the base flange and the gland flange.

10. The pipeline-embedded cathodic protection system according to claim 1, characterized in that, The potentiostat includes a housing, a loop connection position and an electrode connection position located inside the housing, the loop cable is connected to the loop connection position, and the electrode cable is connected to the electrode connection position.

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