A deep well anode bed structure for corrosion protection of natural gas pipelines

Abstract

This utility model relates to the field of anode ground beds, and more particularly to a deep well anode ground bed structure for corrosion protection of natural gas pipelines. It includes an installation column, a limiting groove, and a protrusion. The installation column has grooves at both ends, one of which has a limiting groove embedded in its outer edge. The inner wall of the limiting groove has an inverted V-shaped guide surface. The outer edge of the other groove has a protrusion with a thickness equal to that of the limiting groove. Both sides of the grooves have aluminum alloy electrofusion blocks arranged in a ring array around their outer edges. This device utilizes the pre-set aluminum alloy electrofusion block structure to achieve rapid and efficient welding between devices, forming an oxide film that optimizes the protection of the device surface. It solves the problem that existing welding methods between anode ground beds are too traditional and prone to rapid corrosion after prolonged use, affecting the long-term use of the device and increasing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of anode ground beds, and in particular to a deep well anode ground bed structure for corrosion protection of natural gas pipelines. Background Technology

[0002] Deep-well anode beds are devices used in cathodic protection systems to prevent corrosion of underground metal structures (such as pipelines and storage tanks). They consist of a set of anodes (such as high-silicon cast iron or precious metal oxide anodes) installed in vertical boreholes (reaching depths of tens to hundreds of meters) and filled with conductive coke backfill. By connecting the anodes to an external power source (forced current cathodic protection), the current flows through the soil to the protected metal, inhibiting its electrochemical corrosion. Deep-well designs are suitable for high-resistivity soils or space-constrained areas, offering advantages such as uniform current distribution, minimal interference, and long service life. They are widely used in corrosion protection projects for long-distance pipelines and urban pipe networks.

[0003] While existing technologies can achieve a certain level of protection for surface pipelines, they have drawbacks: the welding methods between existing anode beds are too traditional, and corrosion can easily occur quickly after prolonged use, affecting the long-term use of the equipment and increasing maintenance costs. In view of this, we propose a deep well anode bed structure for natural gas pipeline corrosion protection, which solves the above problems. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a deep well anode bed structure for corrosion protection of natural gas pipelines.

[0005] The technical solution of this utility model is as follows: a deep well anode bed structure for corrosion protection of natural gas pipelines, including an installation column, a limiting groove and a protrusion. The installation column has a sink groove at both ends, one of which has a limiting groove embedded in its outer edge. The inner wall of the limiting groove has an inverted V-shaped flow guide surface. The outer edge of the other sink groove has a protrusion with the thickness of the protrusion being equal to the thickness of the limiting groove. The outer ring of both sink grooves has aluminum alloy electrofusion blocks arranged in a ring array.

[0006] The key difference in the use of this device lies in its connection method. Typically, mounting columns are welded in sections, requiring the protrusions of other mounting columns to be inserted into the limiting groove before welding. This device innovatively incorporates pre-embedded aluminum alloy electrofusion blocks at both welding points. After inserting the mounting column into the ground, the user only needs to weld the beginning and end. This is achieved by quickly melting and welding the aluminum alloy electrofusion blocks. Utilizing the characteristic that it quickly forms an oxide film on the surface after welding, it improves the airtightness and corrosion resistance of the weld point, achieving high efficiency, convenience, and extended service life, thus possessing high practicality.

[0007] Preferably, the outer wall of the settling tank is provided with mounting grooves arranged in a ring array. Aluminum alloy electrofused blocks are welded inside the mounting grooves. The ring array design of the mounting grooves makes the aluminum alloy electrofused blocks more evenly distributed, and the heat transfer during welding is more stable, further ensuring the consistency of welding quality. After welding, when exposed to air, an Al2O3 film will be generated immediately. This film has self-healing properties and high chemical stability.

[0008] Preferably, the inner wall of the mounting column is provided with a through hole one, and a through hole two is provided on one side of the through hole one, with the through hole one and the through hole two being preset points.

[0009] Preferably, the outer wall of the mounting column is provided with grooves arranged in a ring array. The width of the grooves is five millimeters. The design of the ring grooves increases the friction and deformation resistance of the outer wall of the mounting column, while reducing the amount of material used, enhancing the soil anchoring effect, improving the resistance to lateral pressure, and saving material costs.

[0010] Preferably, the outermost layer of the mounting column is an outer protective layer, and the innermost layer of the outer protective layer is a wear-resistant woven mesh. The combination of the outer protective layer and the wear-resistant woven mesh provides double protection against external mechanical wear and environmental impact, significantly extending the life of the column, reducing surface damage, and adapting to harsh environments.

[0011] Preferably, the innermost layer of the wear-resistant woven mesh is an acid and alkali resistant layer, and the innermost layer of the acid and alkali resistant layer is a coke coating layer. The layered structure of the acid and alkali resistant layer and the coke coating layer further resists chemical corrosion and adsorbs harmful substances, thereby improving environmental adaptability.

[0012] Preferably, the outer layer of the first and second through holes is provided with a conductive polymer coating layer, which protects the through holes while providing electromagnetic shielding or anti-static functions.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] I. This utility model comprehensively improves the welding efficiency, connection strength, corrosion resistance and environmental adaptability of the mounting column by innovating the limiting fit of the sink groove, pre-embedded electrofusion blocks and the application of layered materials (wear-resistant, acid and alkali resistant, conductive wrapping, etc.).

[0015] Second, based on the first beneficial effect, the aluminum alloy electrofused block can form an oxide film after melting and cooling, which significantly extends the service life. The layered protection inside the device further increases the service life of the device. It can be widely used in construction, chemical, power and other fields, and has a highly efficient and long-lasting underground pipeline protection effect.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] Figure 1 This is a three-dimensional perspective view of the present invention from a first angle;

[0018] Figure 2 This is a two-dimensional perspective view of the present invention.

[0019] Figure 3 This is a top view of the present invention;

[0020] Figure 4 This is a front view schematic diagram of the present invention;

[0021] Figure 5 For the present utility model Figure 1 Enlarged schematic diagram of structure A in the middle;

[0022] Figure 6 For the present utility model Figure 2 Enlarged schematic diagram of the B-structure.

[0023] Figure label:

[0024] 1. Mounting post; 2. Groove; 3. Through hole one; 4. Through hole two; 5. Outer protective layer; 6. Wear-resistant woven mesh; 7. Acid and alkali resistant layer; 8. Coke coating layer; 9. Conductive polymer coating layer; 10. Settling tank; 11. Limiting groove; 12. Flow guiding surface; 13. Aluminum alloy electrofused block; 14. Mounting groove; 15. Protrusion. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0029] Example 1

[0030] Please see Figures 1-6 As shown, this embodiment is a deep well anode bed structure for corrosion protection of natural gas pipelines, including an installation column 1, a limiting groove 11 and a protrusion 15. The installation column 1 has sinkers 10 at both ends. One of the sinkers 10 has a limiting groove 11 embedded in its outer edge. The inner wall of the limiting groove 11 has an inverted V-shaped guide surface 12. The outer edge of the other sinker 10 has a protrusion 15. The thickness of the protrusion 15 is equal to the thickness of the limiting groove 11. The outer ring of both sinkers 10 has aluminum alloy electrofusion blocks 13 arranged in a ring array.

[0031] The key to using this device lies in its connection method. Typically, the mounting column 1 is welded in sections, requiring the protrusions 15 of other mounting columns 1 to be inserted into the limiting groove 11 before welding. This device innovatively embeds aluminum alloy electrofusion blocks 13 at the welding points on both sides. After inserting the mounting column 1 into the ground, the user only needs to weld the beginning and end. This can be achieved by quickly melting and welding the aluminum alloy electrofusion blocks 13. Utilizing the characteristic that it can quickly form an oxide film on the surface after welding, it improves the airtightness and corrosion resistance of the welding point, achieving high efficiency, convenience, and extended service life, thus possessing high practicality.

[0032] Example 2

[0033] Please see Figures 1-6 As shown, this embodiment, based on embodiment 1, further includes: an installation groove 14 arranged in a ring array on the outer wall of the settling tank 10, and an aluminum alloy electrofusion block 13 welded inside the installation groove 14. The ring array design of the installation groove 14 makes the aluminum alloy electrofusion block 13 more evenly distributed, and the heat transfer during welding is more stable, further ensuring the consistency of welding quality. After welding, when exposed to air, an Al2O3 film will be generated immediately. This film has self-healing properties and high chemical stability.

[0034] The inner wall of the mounting column 1 has a through hole 3, and a through hole 4 is provided on one side of the through hole 3. The through holes 3 and 4 are preset points, which are the installation positions of the conventional parts of the device. They are not within the scope of protection required by this solution and will not be explained further.

[0035] The outer wall of the mounting column 1 is provided with grooves 2 arranged in a ring array. The width of the grooves 2 is five millimeters. The design of the ring grooves 2 increases the friction and deformation resistance of the outer wall of the mounting column 1, while reducing the amount of material used, enhancing the soil anchoring effect, improving the resistance to lateral pressure, and saving material costs.

[0036] The outermost layer of the mounting column 1 is the outer protective layer 5. Inside the outer protective layer 5 is a wear-resistant woven mesh 6. The combination of the outer protective layer 5 and the wear-resistant woven mesh 6 provides double protection against external mechanical wear and environmental impact, significantly extending the life of the column, reducing surface damage, and adapting to harsh environments.

[0037] The wear-resistant woven mesh 6 has an inner layer of acid and alkali resistant layer 7, and the acid and alkali resistant layer 7 has an inner layer of coke coating layer 8. The layered structure of the acid and alkali resistant layer 7 and the coke coating layer 8 further resists chemical corrosion and adsorbs harmful substances, improving environmental adaptability.

[0038] The outer layer of through hole 3 and through hole 4 is provided with a conductive polymer coating layer 9, which protects the through holes and provides electromagnetic shielding or anti-static function.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A deep well anode bed structure for corrosion protection of natural gas pipelines, comprising an installation column (1), a limiting groove (11), and a protrusion (15), characterized in that: The mounting post (1) has grooves (10) at both ends. One of the grooves (10) has a limiting groove (11) embedded in its outer edge. The inner wall of the limiting groove (11) has an inverted V-shaped guide surface (12). The other groove (10) has a protrusion (15) on its outer edge. The thickness of the protrusion (15) is equal to the thickness of the limiting groove (11). The outer ring of both grooves (10) has aluminum alloy electrofused blocks (13) arranged in a ring array.

2. The deep well anode bed structure for corrosion protection of natural gas pipelines according to claim 1, characterized in that: The outer wall of the settling tank (10) is provided with mounting grooves (14) arranged in a ring array, and aluminum alloy electrofusion blocks (13) are welded inside the mounting grooves (14).

3. The deep well anode bed structure for corrosion protection of natural gas pipelines according to claim 1, characterized in that: The inner wall of the mounting column (1) is provided with a through hole 1 (3), and a through hole 2 (4) is provided on one side of the through hole 1 (3).

4. The deep well anode bed structure for corrosion protection of natural gas pipelines according to claim 1, characterized in that: The outer wall of the mounting post (1) is provided with grooves (2) arranged in a ring array, and the width of the grooves (2) is five millimeters.

5. The deep well anode bed structure for corrosion protection of natural gas pipelines according to claim 1, characterized in that: The outermost layer of the mounting post (1) is an outer protective layer (5), and the innermost layer of the outer protective layer (5) is a wear-resistant woven mesh (6).

6. The deep well anode bed structure for corrosion protection of natural gas pipelines according to claim 5, characterized in that: The wear-resistant woven mesh (6) has an inner layer of acid and alkali resistant layer (7), and the acid and alkali resistant layer (7) has an inner layer of coke coating layer (8).

7. The deep well anode bed structure for corrosion protection of natural gas pipelines according to claim 3, characterized in that: The outer layer of the through hole one (3) and through hole two (4) is provided with a conductive polymer coating layer (9).

Images