Flexible anode for water environment

Abstract

The utility model provides a flexible anode for a water environment, which relates to the field of anti-corrosion equipment and comprises an anode body, a protective sleeve is arranged outside the anode body, and two ends of the protective sleeve are fixedly connected with the anode body; the anode body is of a one-section structure and comprises a cable core and an anode coating, the outer surface of the cable core is coated with the anode coating, the cable core is electrically connected with the anode cable, and the connecting point of the cable core and the anode cable is located outside the protective sleeve. The anode body is of a one-section structure, the cable core serves as a base body, the outer surface of the cable core is coated with the anode coating, when the cable core is electrically connected with the anode cable, the anode coating plays a role in protecting a cathode in an electrolytic tank, a connecting point can be located above the water surface, and no connecting point is arranged in the protective sleeve. The problem of anode body failure caused by disconnection of the connection point of the anode body and the anode cable due to poor waterproof sealing performance is prevented, and the service life of the steel structure in the underground water-sealed cave depot is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-corrosion equipment, in particular to a flexible anode for water environment. Background Art

[0002] There are many steel structures such as pipes and brackets in the vertical shaft of underground water-sealed caverns, and the pipe diameters are of different sizes. These steel structures should be protected against corrosion using impressed current cathodic protection technology. The selection of auxiliary anodes in the impressed current cathodic protection system is key. To ensure that the auxiliary anodes can serve in a water environment for a long time, the pipes in the vertical shaft of the water-sealed caverns are installed vertically on the ground. It should also be ensured that the weight of the auxiliary anodes is not too large, otherwise the cables connected to the auxiliary anodes may bear too much weight, causing the cables to easily disconnect. Therefore, the existing technology uses MMO / Ti anodes with light weight and high current output density. The shapes are tubular and linear. The tubular anodes are made in the form of anode strings; the linear anodes are MMO / Ti flexible anode structures used in soil environments. Since the coke filler, wrapped fabric layer, and wear-resistant woven mesh in this anode structure cannot be immersed in a water environment for a long time, they are replaced by water-resistant porous high-density polyethylene pipes.

[0003] In the prior art, the anode body is a segmented structure, which consists of a cable and an anode wire (or an anode tube). The cable and the anode wire (or an anode tube) are arranged in parallel, and each segment is electrically connected.

[0004] The applicant has discovered that the prior art suffers from at least the following technical problems: The auxiliary anode structure in the prior art has numerous connection points between the anode and the cable. In a structure employing a string of MMO / Ti tubular anodes, each tubular anode requires two connection points with the anode cable. If 40 MMO / Ti tubular anodes are used in a system, at least 40 connection points will be generated. In a structure employing linear anodes, the MMO / Ti anode wire is connected to the cable every 3-5 meters. The linear anodes must be arranged in parallel with the pipeline (they are arranged in parallel), resulting in a significant number of connection points. In production, these connection points are required to meet an IPX8 waterproof rating. During the required lifespan of the water-sealed cavern (40-50 years), these connection points must be immersed in a water medium environment. During this period, these connection points are inevitably subject to water leakage. Once water leakage causes the anode cable to disconnect from the auxiliary anode, the auxiliary anode cannot be energized and cannot output current. Consequently, the protected structure cannot receive sufficient protection current, lacking adequate protection and subjecting it to corrosion, thus shortening the lifespan of the underground water-sealed cavern. Utility Model Content

[0005] The purpose of the present utility model is to provide a flexible anode for use in an aquatic environment, so as to solve the technical problem in the prior art that the segmented structure of the anode body has many electrical connection points, and these connection points leak due to poor sealing performance in the aquatic environment, resulting in the anode body being unable to be powered; the many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the present utility model are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The utility model provides a flexible anode for aquatic environment, wherein the flexible anode includes an anode body, wherein:

[0008] The anode body is a one-piece structure, comprising a cable core and an anode coating, wherein:

[0009] The anode coating is coated on the outer surface of the cable core, and the cable core is electrically connected to the anode cable; a protective sleeve is provided on the outside of the anode body, and both ends of the sleeve are fixedly connected to the anode body.

[0010] Preferably, the anode body is electrically connected to the anode cable via a connection point, and the connection point is located above the water surface.

[0011] Preferably, the anode coating comprises a metal oxide coating.

[0012] Preferably, the protective sleeve is a high-density polyethylene plastic sleeve or a polyvinyl chloride sleeve.

[0013] Preferably, the protective sleeve is provided with perforations, the perforations pass through the side wall of the protective sleeve, and the perforations are evenly spaced on the protective sleeve.

[0014] Preferably, the perforations are provided in two or more rows, and the perforations in each row are arranged at intervals along the axial direction of the protective sleeve.

[0015] Preferably, the perforations in all rows are evenly distributed on the peripheral wall of the protective sleeve around the axis of the protective sleeve.

[0016] Preferably, the protective sleeve is a cylindrical structure, the perforations are arranged in four rows, and the central angle between the perforations in any adjacent rows is 90°.

[0017] Preferably, the inner diameter of the protective sleeve is larger than the outer diameter of the anode body, and the protective sleeve and the anode body are coaxially arranged.

[0018] Preferably, both ends of the protective sleeve are fixedly connected to the anode body through sealing joints.

[0019] The flexible anode for water environment provided by the utility model has the following beneficial effects compared with the prior art: the anode body is a one-piece structure with a cable core as a substrate, the anode coating is coated on the outer surface of the cable core, and when the cable core is electrically connected to the anode cable, the anode coating plays a role in protecting the cathode in the electrolytic cell. The electrical connection point between the anode body and the anode cable is not in the protective casing. When the flexible anode is used in a water environment, the connection point can be located above the water surface, and no connection point is provided in the protective casing. This can prevent the connection point between the anode body and the anode cable from being disconnected due to poor waterproof sealing performance, resulting in failure of the anode body, thereby ensuring the service life of the steel structure in the underground water-sealed cavern. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the structure of a flexible anode for water environment;

[0022] Figure 2 It is a schematic diagram of the arrangement structure of flexible anodes for water environment and protected pipelines.

[0023] In the figure, 10, flexible anode; 1, anode body; 11, cable core; 12, anode coating; 2, protective sleeve; 3, perforation; 4, sealing joint; 20, connection point; 30, anode cable; 40, junction box; 50, protected pipeline; 60, cathode cable. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center," "length," "width," "height," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and "side" and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0026] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0027] In the prior art, the anode body is a segmented structure consisting of a cable and anode wire (or anode tube). The cable and anode wire (or anode tube) are arranged parallel to each other, and the segments are electrically connected. The auxiliary anode structure in the prior art has many connection points between the anode and the cable. In a structure using a MMO / Ti tubular anode string, each tubular anode requires two connection points with the anode cable. If a system uses 40 MMO / Ti tubular anodes, there will be at least 40 connection points. In a structure using linear anodes, the MMO / Ti anode wire is connected to the cable every 3-5 meters. The linear anodes must be arranged at the same length as the pipeline (they are arranged parallel to each other), and there are also many connection points. In production, the waterproof grade requirement for these connection points is IPX8. They must be immersed in a water medium environment within the required life span of the water-sealed cavern (40 to 50 years). During this period, these connection points are inevitably subject to water leakage. Once the leakage causes the anode cable to be disconnected from the auxiliary anode, the auxiliary anode cannot be powered and cannot output current. In this way, the protected structure cannot obtain sufficient protection current, is not fully protected and is corroded, affecting the life of the underground water-sealed cavern.

[0028] In response to the above problems, the utility model provides a flexible anode for water environment. The anode body is a one-piece structure, and there is no connection point in the protective casing. It can prevent the connection point between the anode body and the anode cable from being disconnected due to poor sealing, resulting in failure of the anode body, thereby ensuring the life of the underground water seal cavern.

[0029] The following combination Figure 1 and Figure 2 The technical solution provided by the utility model is described in more detail.

[0030] like Figure 1 and Figure 2 As shown, the utility model provides a flexible anode 10 for a water environment, wherein the flexible anode is arranged parallel to the length direction of the protected pipe, and one end of the flexible anode 10 is fixedly arranged, which end can be the lower end (the embodiment shown in the figure) or the side end of the flexible anode 10. Alternatively, both ends of the flexible anode 10 are connected to the anode cable. The flexible anode 10 includes an anode body 1, wherein: a protective sleeve 2 is provided outside the anode body 1, and both ends of the protective sleeve 2 are fixedly connected to the anode body 1; the anode body 1 is a one-piece structure, and the anode body 1 includes a cable core 11 and an anode coating 12, wherein: the anode coating 12 is coated on the outer surface of the cable core 11, and the cable core 11 is used to be electrically connected to the anode cable 30, and the connection point 20 between the two is located outside the protective sleeve 2.

[0031] The flexible anode 10 for water environment in this embodiment has a one-stage structure, a cable core 11 as a substrate, and an anode coating 12 coated on the outer surface of the cable core 11. When the cable core 11 is electrically connected to the anode cable 30, the anode coating 12 plays a role in protecting the cathode in the electrolytic cell. The electrical connection point 20 between the anode body 1 and the anode cable 30 is not in the protective sleeve 2. When the flexible anode 10 is used in a water environment, the connection point 20 can be located above the water surface. There is no connection point 20 in the protective sleeve 2, which can prevent the connection point 20 between the anode body 1 and the anode cable 30 from being disconnected due to poor waterproof sealing, resulting in failure of the anode body 1, thereby ensuring the life of the steel structure in the underground water-sealed cavern.

[0032] As an alternative embodiment, see Figure 2 As shown, the anode body 1 is electrically connected to the anode cable 30 via a connection point 20, and the connection point 20 is located above the water surface.

[0033] Since the anode body 1 is a one-piece structure, there is no connection point 20 (the connection point 20 between the anode body 1 and the anode cable 30) in the protective sleeve 2. When the flexible anode 10 is located in a water environment, water does not come into contact with the connection point 20 when entering the protective sleeve 2. This prevents the connection point 20 from being disconnected due to long-term immersion in the water environment.

[0034] As an optional embodiment, the anode coating 12 in this embodiment includes a metal oxide coating. Preferably, the metal oxide coating can be a mixed metal oxide coating. Mixed metal oxides are mixtures of platinum group metal (Pt, Ir, Ru) oxides and valve metal (Ti, Ta, Nb, Zr) oxides in certain proportions. They have excellent electrical conductivity, corrosion resistance, chemical stability, and a relatively low consumption rate.

[0035] Preferably, the cable core 11 can be made of a metal material that acts as an anode. When the anodic coating 12 is consumed, the cable core 11 acts as an anode and continues to play a protective role. Therefore, in this embodiment, the cable core 11 not only serves as a substrate and a conductor, but also acts as an anode after the anodic coating 12 is consumed.

[0036] As an optional implementation, the protective sleeve 2 in this embodiment is a high-density polyethylene plastic sleeve, or a plastic sleeve made of other water-resistant materials, such as polyvinyl chloride.

[0037] The protective sleeve 2 of this embodiment protects the anode coating 12 by preventing it from falling off due to friction and collision, and prevents the auxiliary anode body 1 from directly contacting the protected steel structure.

[0038] As an alternative embodiment, see Figure 1 As shown, the protective sleeve 2 is provided with perforations 3, which penetrate the side wall of the protective sleeve 2 and are evenly spaced on the protective sleeve 2. The perforations 3 are provided in two or more rows, and the perforations 3 in each row are spaced along the axis of the protective sleeve 2.

[0039] The perforation 3 can prevent the protective sleeve 2 from obstructing the output of the protective current of the anode body, so that the protected pipeline 50 absorbs sufficient protective current, thereby achieving an anti-corrosion protection effect on the protected pipeline 50 through the anode body 1.

[0040] As an alternative embodiment, see Figure 1 As shown, all rows of perforations 3 are evenly distributed on the peripheral wall of the protective sleeve 2 around the axis of the protective sleeve 2. Specifically, the protective sleeve 2 is a cylindrical structure, and the perforations 3 are arranged in four rows, and the central angle between any adjacent rows of perforations 3 is 90°.

[0041] In the above structure, the perforation 3 can prevent the protective sleeve 2 from obstructing the output of the protection current of the anode body, so that the protected pipeline 50 absorbs sufficient protection current, thereby achieving an anti-corrosion protection effect on the protected pipeline 50 through the anode body 1.

[0042] As an alternative embodiment, see Figure 1 As shown, the inner diameter of the protection sleeve 2 is larger than the outer diameter of the anode body 1 , and the protection sleeve 2 and the anode body 1 are coaxially arranged.

[0043] Specifically, the cable core 11 can be made of copper, aluminum, titanium or other current-conducting conductors to ensure good conductivity. The cross-sectional area of ​​the cable core 11 is selected according to the design requirements, for example: 16mm 2 , 25mm 2 , 35mm2 The diameter of the protective sleeve 2 can be selected from DN25mm, DN32mm, DN40mm, etc. The protective sleeve 2 is coaxially arranged with the anode body 1, which can improve the protection effect of the anode body 1.

[0044] As an alternative embodiment, see Figure 1 As shown, both ends of the protective sleeve 2 are fixedly connected to the anode body 1 through sealing joints 4.

[0045] The sealing joint 4 fixedly connects the anode body 1 and the end of the protective sleeve 2 and also plays a sealing role to prevent relative displacement between the anode body 1 and the protective sleeve 2 in the axial and radial directions.

[0046] The cross-sectional radius of the sealing joint 4 gradually increases in a direction approaching the protective sleeve 2 , thereby ensuring a fixing effect on the anode body 1 and the protective sleeve 2 .

[0047] See also Figure 2 As shown, the connection point 20 between the flexible anode 10 and the anode cable 30 is located above the water surface, the anode cable 30 is electrically connected to the anode bus cable in the junction box 40, and the protected pipeline 50 is electrically connected to the cathode bus cable in the junction box 40 through the cathode cable 60.

[0048] In the cathodic protection system of the underground water-sealed cavern shaft, the flexible anode 10 is arranged along the length direction of the protected pipeline 50, the upper end of the anode body 1 is connected to the anode cable 30 to ensure that the connection point 20 is above the water surface, and the lower end is fixed to the bottom of the cavern by a fixing device, or a fixed support is used to keep the flexible anode 10 at a fixed distance from the protected pipeline 50.

[0049] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A flexible anode for water environment, characterized in that: The flexible anode comprises an anode body, wherein: A protective sleeve is provided outside the anode body, and both ends of the protective sleeve are fixedly connected to the anode body; The anode body is a one-piece structure, comprising a cable core and an anode coating, wherein the anode coating is coated on the outer surface of the cable core, the cable core is electrically connected to the anode cable, and the connection point between the two is located outside the protective sleeve.

2. The flexible anode for water environment according to claim 1, characterized in that: The anode body is electrically connected to the anode cable through a connection point, and the connection point is located above the water surface.

3. The flexible anode for water environment according to claim 1, characterized in that: The anode coating includes a metal oxide coating.

4. The flexible anode for water environment according to claim 1, characterized in that: The protective sleeve is a high-density polyethylene plastic sleeve or a polyvinyl chloride sleeve.

5. The flexible anode for water environment according to claim 1 or 4, characterized in that: The protective sleeve is provided with perforations, which penetrate through the side wall of the protective sleeve and are evenly spaced apart on the protective sleeve.

6. The flexible anode for water environment according to claim 5, characterized in that: The perforations are arranged in two or more rows, and the perforations in each row are spaced apart along the axial direction of the protective sleeve.

7. The flexible anode for water environment according to claim 6, characterized in that: The perforations in all rows are evenly distributed on the peripheral wall of the protective sleeve around the axis of the protective sleeve.

8. The flexible anode for water environment according to claim 6, characterized in that: The protective sleeve is a cylindrical structure, the perforations are arranged in four rows, and the central angle between the perforations in any adjacent rows is 90°.

9. The flexible anode for water environment according to claim 1, characterized in that: The inner diameter of the protection sleeve is larger than the outer diameter of the anode body, and the protection sleeve is coaxially arranged with the anode body.

10. The flexible anode for water environment according to claim 1, characterized in that: Both ends of the protective sleeve are fixedly connected to the anode body through sealing joints.

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