A grounding structure for stray current protection of a gas pipeline

Abstract

The utility model relates to gas pipeline grounding structure technical field discloses a kind of grounding structure of stray current protection of gas pipeline, including two pipeline bodies and two fixed plates, the pipeline body end portion is provided with clamping sealing assembly, two the fixed plate inside is provided with ground stake assembly, two the pipeline body outside is provided with protection assembly;The protection assembly includes rustproof coating, the rustproof coating is arranged in the outside of the pipeline body, the rustproof coating outside is provided with conductive shielding layer.In the utility model, the corrosion resistance life of pipeline body is improved by rustproof coating, dense coating blocks electrolyte, so that the corrosion rate of pipeline body is reduced;Conductive shielding layer can intercept most of stray current, so that the fluctuation of pipeline surface potential can be effectively controlled;Grounding current drainage network layer can quickly lead out low-frequency current that is not shielded, to avoid the corrosion caused by current accumulation on the surface of pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of grounding structure for gas pipelines, and in particular to a grounding structure for stray current protection of gas pipelines. Background Technology

[0002] The grounding structure for stray current protection of gas pipelines is a comprehensive protection system that uses multi-layer functional components and grounding devices to work together to shield, conduct, and safely release stray currents, thereby protecting the gas pipeline body from electrochemical corrosion.

[0003] Currently, stray current protection for gas pipelines typically relies on a single anti-corrosion coating to resist stray currents from the pipeline itself. This requires only one layer of anti-corrosion material (such as rust-preventive paint or polyethylene coating) applied to the outside of the pipeline. The construction process is simple, eliminating the need for complex multi-layer structures or grounding components, thus reducing material and installation costs. The anti-corrosion coating also physically isolates the pipeline from electrolytes in the soil, preventing ordinary electrochemical corrosion and extending the pipeline's service life.

[0004] Although a single anti-corrosion coating provides a simple structure and clear basic anti-corrosion effect against stray currents in pipelines, stray currents have strong penetrating power and a single coating is easily broken down, causing the current to act directly on the pipeline body and triggering concentrated corrosion. Moreover, during long-term use, the coating will age and break down due to factors such as soil stress and temperature changes, leading to protection failure. The insidious nature of stray current corrosion can cause damage points to go undetected in time, thus creating safety hazards. Therefore, a grounding structure for stray current protection of gas pipelines is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a grounding structure for stray current protection of gas pipelines, aiming to improve the problem that the existing technology cannot effectively shield stray currents from gas pipelines and protect the pipeline itself.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A grounding structure for stray current protection of gas pipelines includes two pipeline bodies and two fixing plates. The ends of the pipeline bodies are provided with snap-fit ​​sealing components, the inner sides of the two fixing plates are provided with ground pile components, and the outer sides of the two pipeline bodies are provided with protective components.

[0008] The protective component includes an anti-rust coating, which is disposed on the outside of the pipe body. A conductive shielding layer is disposed on the outside of the anti-rust coating. A grounding drainage network layer is disposed on the outside of the conductive shielding layer. An electromagnetic shielding protection composite layer is disposed on the outside of the grounding drainage network layer.

[0009] As a further description of the above technical solution:

[0010] The ground pile assembly includes a main ground pile, which is fixedly connected to the side of the fixing plate. A connecting ring is fixedly connected to the outside of the main ground pile, and a connecting plate is fixedly connected to the outside of the connecting ring. Multiple secondary ground piles are fixedly connected to the bottom of the connecting plate.

[0011] As a further description of the above technical solution:

[0012] The snap-fit ​​sealing assembly includes two arc-shaped snap blocks, both of which are located at the ends of the two pipe bodies. Two fixing bolts are provided on the inner side of both ends of the two arc-shaped snap blocks, and grooves are provided at both ends of the two pipe bodies.

[0013] As a further description of the above technical solution:

[0014] The snap-fit ​​sealing assembly also includes multiple sealing rings, which are respectively fixedly connected to the inner sides of the two arc-shaped snap blocks and snap-fitted into the inner sides of the two grooves.

[0015] As a further description of the above technical solution:

[0016] The two ends of the arc-shaped card block are fixedly connected to a fixing block one, the two fixing blocks one are fixedly connected to a card slot block on both sides, and the bottom of the two fixing blocks one is provided with a support block.

[0017] As a further description of the above technical solution:

[0018] Each of the multiple slot blocks has a slidably connected card block inside, and each of the multiple card blocks has a fixing bolt 2 inside its end. The multiple fixing bolt 2 are respectively located at both ends of the support block.

[0019] As a further description of the above technical solution:

[0020] Both of the two fixed plates are fixedly connected to the ends of the two fixed plates. Two copper wires are provided on the inner side of each of the two fixed plates. Fixed blocks two are fixedly connected to both ends of the two fixed plates. The ends of the multiple copper wires are respectively provided on the inner side of the multiple fixed blocks two.

[0021] As a further description of the above technical solution:

[0022] An insulating layer is provided on the outer side of both of the electromagnetic shielding protective composite layers.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the anti-rust coating extends the corrosion resistance life of the pipe body, and the dense coating blocks electrolytes, reducing the corrosion rate of the pipe body; the conductive shielding layer can intercept most of the stray current, effectively controlling the potential fluctuations on the pipe surface; the grounding drainage network layer can quickly discharge unshielded low-frequency current, preventing current accumulation on the pipe surface and causing corrosion; the electromagnetic shielding protection composite layer can block stray currents generated by electromagnetic induction, protecting the pipe body; the insulation layer uses high-molecular insulating materials to isolate the internal conductive structure from the external environment.

[0025] 2. In this utility model, the main ground pile is driven vertically into the ground to serve as the main grounding body to receive the current, providing a low-resistance grounding path to ensure that stray current is quickly released to the ground. The connecting ring and connecting plate expand the grounding area and improve the current diffusion efficiency. The secondary ground piles radiate to expand the current release range and avoid local soil electrolytic corrosion caused by current concentration. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a grounding structure for stray current protection of gas pipelines proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the pipeline body for a grounding structure for stray current protection of gas pipelines proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the support block of a grounding structure for stray current protection of gas pipelines proposed in this utility model.

[0029] Figure 4 This is a schematic diagram of the arc-shaped locking block of the grounding structure for stray current protection of gas pipelines proposed in this utility model;

[0030] Figure 5 A schematic diagram of the sealing ring of a grounding structure for stray current protection of gas pipelines proposed in this utility model;

[0031] Figure 6 A schematic diagram of the copper conductor of the grounding structure for stray current protection of gas pipelines proposed in this utility model;

[0032] Figure 7 This is a schematic diagram of the secondary grounding pile of the grounding structure for stray current protection of gas pipelines proposed in this utility model;

[0033] Figure 8 This is a schematic diagram of the groove structure of the grounding structure for stray current protection of gas pipelines proposed in this utility model.

[0034] Legend:

[0035] 1. Pipe body; 2. Groove; 3. Support block; 4. Arc-shaped locking block; 5. Main ground stake; 6. Secondary ground stake; 7. Insulation layer; 8. Sealing ring; 9. Fixing bolt one; 10. Connecting block; 11. Fixing plate; 12. Connecting plate; 13. Copper conductor; 14. Fixing block one; 15. Slot block; 16. Locking block; 17. Fixing bolt two; 18. Fixing block two; 19. Connecting ring; 20. Rust-proof coating; 21. Conductive shielding layer; 22. Grounding drainage network layer; 23. Electromagnetic shielding protection composite layer. Detailed Implementation

[0036] 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.

[0037] Reference Figure 1 , Figure 2 and Figure 8 An embodiment of this utility model is provided: a grounding structure for stray current protection of gas pipelines, including two pipeline bodies 1 and two fixing plates 11. The ends of the pipeline bodies 1 are provided with snap-fit ​​sealing components, the inner sides of the two fixing plates 11 are provided with ground pile components, and the outer sides of the two pipeline bodies 1 are provided with protective components.

[0038] The protective components include an anti-rust coating 20, which is applied to the outside of the pipe body 1. The anti-rust coating 20 uses dense anti-corrosion materials such as epoxy resin or polyurethane to prevent electrochemical corrosion caused by stray currents. As a basic protective layer, it prioritizes isolating the corrosive environment and extends the service life of the pipe body. A conductive shielding layer 21 is applied outside the anti-rust coating 20. The conductive shielding layer 21 uses a low-resistance conductive material metal mesh or conductive polymer and is tightly attached to the outside of the anti-rust coating. Its function is to actively intercept stray currents and guide them to the grounding drainage network layer 22 through its own conductivity, preventing the current from directly acting on the pipe body. A grounding drainage network layer 22 is applied outside the conductive shielding layer 21. The grounding drainage network layer 22 is a mesh structure composed of metal conductors such as copper strips and flat steel, wrapped around the outside of the conductive shielding layer. This is the core guiding layer, enabling efficient transfer of stray currents from the pipe to the ground. An electromagnetic shielding protection composite layer 23 is applied outside the grounding drainage network layer 22. The inner layer of the electromagnetic shielding protection composite layer 23 is a magnetically conductive material, and the outer layer is an insulating material. The magnetically conductive layer attenuates the alternating current generated by electromagnetic induction through the hysteresis effect. The insulating outer layer isolates the external environment, prevents corrosion of the magnetically conductive layer, and assists in fixing the grounding drainage network layer. Insulating layers 7 are provided on the outer sides of both electromagnetic shielding composite layers 23. As the outermost layer, the insulating layer 7 is made of high-molecular insulating material, isolating the internal conductive structure from the external environment.

[0039] Reference Figure 3 , Figure 6 and Figure 7 The grounding assembly includes a main grounding pile 5, which is fixedly connected to the side of a fixing plate 11. The main grounding pile 5 is driven vertically into the ground, serving as the primary grounding electrode. It directly receives stray currents conducted by the grounding drainage network layer and conducts the current into the underground soil through its high conductivity. This establishes a main grounding path between the pipeline and the earth, ensuring effective current release. A connecting ring 19 is fixedly connected to the outside of the main grounding pile 5, and a connecting plate 12 is fixedly connected to the outside of the connecting ring 19. The connecting ring 19 is fitted onto the outside of the main grounding pile 5 and extends horizontally in all directions through the connecting plate 12, forming a radial grounding network. This expands the grounding area, reduces the contact resistance between the main grounding pile and the soil, and improves current diffusion efficiency. Multiple secondary grounding piles 6 are fixedly connected to the bottom of the connecting plate 12. The secondary grounding piles 6 are vertically fixed to the bottom of the connecting plate 12, forming a three-dimensional grounding network with the main grounding piles, enhancing the current release capability to deep soil layers. This improves the reliability of the grounding system, ensuring that stray currents are quickly and thoroughly discharged to the earth.

[0040] Reference Figure 3 , Figure 4 and Figure 5The snap-fit ​​sealing assembly includes two arc-shaped locking blocks 4, each located at the end of one of the two pipe bodies 1. Two fixing bolts 9 are located on the inner side of each end of the arc-shaped locking blocks 4. Grooves 2 are formed at both ends of the two pipe bodies 1. The arc-shaped locking blocks 4 are inserted into the grooves and secured by the fixing bolts 9. Mechanical locking restricts axial and radial displacement of the pipes, ensuring interface stability. The snap-fit ​​sealing assembly also includes multiple sealing rings 8, which are fixedly connected to the inner sides of the two arc-shaped locking blocks 4 and snapped into the inner sides of the two grooves 2. The sealing rings 8 are embedded in the inner sides of the arc-shaped locking blocks 4 and snapped into the grooves 2, forming an annular sealing barrier. This prevents the formation of localized corrosion cells at the interface due to electrolyte accumulation and avoids the generation of additional stray currents.

[0041] Reference Figure 3 and Figure 5 The arc-shaped locking block 4 has a fixing block 14 fixedly connected to both ends of its sides. Each of the two fixing blocks 14 has a slotted block 15 fixedly connected to both sides, and a support block 3 is provided at the bottom of each fixing block 14. A locking block 16 is slidably connected to the inner side of each slotted block 15, and a fixing bolt 2 17 is provided at the inner side of each end of each locking block 16. The fixing bolts 2 17 are respectively located at both ends of the support block 3. The slotted blocks 15 on both sides of the fixing block 14 are slidably connected to the locking blocks 16 on the support block 3 and locked by the fixing bolts 2 17. This enhances the tensile and torsional resistance between the fixing block 14 and the support block 3.

[0042] Reference Figure 3 , Figure 6 and Figure 7 Each of the two fixed plates 11 has a connecting block 10 fixedly connected to its end. Two copper wires 13 are installed inside each connecting block 10. Each of the two connecting plates 12 has a second fixing block 18 fixedly connected to its end. The ends of multiple copper wires 13 are respectively located inside multiple second fixing blocks 18. The fixed plates 11, the grounding drainage network layer, and the connecting plates 12 are electrically connected through the connecting blocks 10 and the second fixing blocks 18. High-purity copper wires are used to ensure a complete conductive path is formed between the pipe body, the protective components, and the grounding pile components. This prevents grounding interruptions due to loose connections and ensures the continuity of current conduction.

[0043] Working Principle: The anti-rust coating 20 is located on the outside of the pipe body 1. A dense anti-corrosion material isolates the pipe from the external electrolyte environment, preventing electrochemical corrosion caused by stray currents. The conductive shielding layer 21, made of low-resistance conductive metal mesh or conductive polymer, is tightly attached to the outside of the anti-rust coating. Its function is to actively intercept stray currents and guide them to the grounding drainage network layer 22 through its own conductivity, preventing the current from directly acting on the pipe body. The grounding drainage network layer 22 is a mesh structure composed of copper conductor strips, wrapped around the outside of the conductive shielding layer. When stray currents are conducted through the conductive shielding layer, the network layer quickly guides the current to the grounding pile assembly through a low-resistance path, ultimately releasing it to the ground, thus achieving the drainage function. The electromagnetic shielding protection composite layer 23, made of a composite of magnetic and insulating materials, covers the outside of the grounding drainage network layer. Its function is to block stray currents generated by electromagnetic induction and further guide them through the grounding drainage network layer, forming double protection. The outermost insulating layer 7 is made of polymer insulating material, which isolates the internal conductive structure from the external environment, prevents the intrusion of media such as moisture and soil, and avoids accidental grounding failure of the grounding drainage network layer.

[0044] The main grounding pile 5 is driven vertically into the ground, serving as the primary grounding electrode, and is connected to the pipeline body via the fixing plate 11. This allows it to directly receive the current conducted by the grounding drainage network layer. The connecting ring 19 on the outer side of the main grounding pile extends outwards through the connecting plate 12, expanding the grounding area. The secondary grounding piles 6 at the bottom of the connecting plate 12 are radially distributed, further reducing grounding resistance and improving current diffusion efficiency. The copper conductor 13 connects the fixing plate 11 and the connecting plate 12 via the connecting block 10 and the fixing block 18, ensuring a complete conductive path is formed between the pipeline body, the grounding drainage network layer, and the grounding pile assembly.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A grounding structure for stray current protection of gas pipelines, comprising two pipeline bodies (1) and two fixing plates (11), characterized in that: The pipe body (1) is provided with a snap-fit ​​sealing assembly at its end, and the two fixing plates (11) are provided with ground pile assemblies on their inner sides, and the two pipe bodies (1) are provided with protective assemblies on their outer sides. The protective component includes a rust-proof coating (20), which is disposed on the outside of the pipe body (1). A conductive shielding layer (21) is disposed on the outside of the rust-proof coating (20), a grounding drainage network layer (22) is disposed on the outside of the conductive shielding layer (21), and an electromagnetic shielding protection composite layer (23) is disposed on the outside of the grounding drainage network layer (22).

2. The grounding structure for stray current protection of gas pipelines according to claim 1, characterized in that: The ground pile assembly includes a main ground pile (5), which is fixedly connected to the side of the fixing plate (11). A connecting ring (19) is fixedly connected to the outside of the main ground pile (5), and a connecting plate (12) is fixedly connected to the outside of the connecting ring (19). Multiple secondary ground piles (6) are fixedly connected to the bottom of the connecting plate (12).

3. The grounding structure for stray current protection of gas pipelines according to claim 1, characterized in that: The snap-fit ​​sealing assembly includes two arc-shaped snap blocks (4), both of which are located at the ends of the two pipe bodies (1). Two fixing bolts (9) are provided on the inner sides of both ends of the two arc-shaped snap blocks (4), and grooves (2) are provided at both ends of the two pipe bodies (1).

4. The grounding structure for stray current protection of gas pipelines according to claim 3, characterized in that: The snap-fit ​​sealing assembly also includes multiple sealing rings (8), which are fixedly connected to the inner sides of the two arc-shaped snap blocks (4) and snap-fitted into the inner sides of the two grooves (2).

5. The grounding structure for stray current protection of gas pipelines according to claim 3, characterized in that: The arc-shaped card block (4) has a fixed block (14) fixedly connected to both sides, and a slot block (15) fixedly connected to both sides of the two fixed blocks (14). A support block (3) is provided at the bottom of the two fixed blocks (14).

6. The grounding structure for stray current protection of gas pipelines according to claim 5, characterized in that: Multiple slot blocks (15) are slidably connected to a block (16) on their inner sides. Multiple blocks (16) are provided with a fixing bolt (17) on their inner sides at their ends. Multiple fixing bolts (17) are respectively provided at both ends of the support block (3).

7. The grounding structure for stray current protection of gas pipelines according to claim 2, characterized in that: Both ends of the two fixed plates (11) are fixedly connected to a connecting block (10), and two copper wires (13) are provided on the inner side of each of the two connecting blocks (10). Both ends of the two connecting plates (12) are fixedly connected to a second fixed block (18), and the ends of the multiple copper wires (13) are respectively provided on the inner side of the multiple second fixed blocks (18).

8. The grounding structure for stray current protection of gas pipelines according to claim 1, characterized in that: An insulating layer (7) is provided on the outside of both of the electromagnetic shielding protective composite layers (23).

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