Cathode protection device applied to buried steel pipeline

Abstract

The utility model discloses a cathode protection device applied to a buried steel pipeline, which comprises a sacrificial anode assembly, an anode wire and a filling material, the sacrificial anode assembly comprises a sacrificial anode and an electrode slice, the electrode slice is connected with the upper end face of the sacrificial anode, a first end of the anode wire is used for being electrically connected with the buried steel pipeline to be protected, and a second end of the anode wire is used for being electrically connected with the filling material. The second end of the anode wire is electrically connected with the electrode plate, and the sacrificial anode assembly is located in the filling material and integrally buried in an underground anode pit. According to the utility model, not only is the excavation and maintenance cost greatly reduced, but also the complexity and difficulty of excavation and maintenance are obviously reduced.

Description

Technical Field

[0001] This utility model relates to, but is not limited to, the field of pipeline corrosion protection technology, and in particular to a cathodic protection device for buried steel pipelines. Background Technology

[0002] In the underground gas pipeline network of the city, the buried courtyard pipes in the residential area are usually made of inexpensive PE pipes. However, since the gas pipeline after emerging from the ground must be made of steel, a steel-plastic conversion head is installed before the buried PE pipe emerges from the ground to make the pipe into a steel pipe before it can be led out of the ground and into the gas valve box.

[0003] Therefore, considering the cost and the difficulty of excavating for landscaping in residential areas, the buried steel pipes a few meters or tens of meters after the steel-plastic converter are generally not cathodic protected, meaning sacrificial anode protection is not installed. A set of ordinary sacrificial anodes has an effective protection range of over 100 meters. If each outlet pipe were installed individually, the cost would be enormous. Moreover, ordinary sacrificial anodes are bulky, requiring very large excavations for installation. Excavation and repair within residential areas usually require the consent of the owners or property management, and the larger the excavation, the greater the restoration cost. Utility Model Content

[0004] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims. This invention aims to at least solve one of the technical problems existing in the prior art. To this end, embodiments of this invention provide a cathodic protection device for buried steel pipelines, which not only significantly reduces the cost of excavation and maintenance but also significantly reduces the complexity and difficulty of excavation and maintenance.

[0005] This utility model provides a cathodic protection device for buried steel pipelines, comprising: a sacrificial anode assembly, an anode wire, and a packing material. The sacrificial anode assembly includes a sacrificial anode and an electrode plate. The electrode plate is connected to the upper end face of the sacrificial anode. The first end of the anode wire is used for electrical connection to the buried steel pipeline to be protected, and the second end of the anode wire is electrically connected to the electrode plate. The sacrificial anode assembly is located within the packing material and is entirely buried in an underground anode pit.

[0006] According to some embodiments of this utility model, the sacrificial anode is a magnesium alloy sacrificial anode.

[0007] According to some embodiments of the present invention, the anode wire is connected and fixed to the electrode sheet by fasteners.

[0008] According to some embodiments of the present invention, the electrode sheet is provided with a through hole, and the fastener includes a through insert and a screw fastener that cooperates with the through insert. The through insert passes through the through hole and connects the anode wire to the electrode sheet, and the screw fastener is used to fix the anode wire and the electrode sheet.

[0009] According to some embodiments of this utility model, the insert is a screw and the fastener is a nut.

[0010] According to some embodiments of this utility model, the electrode sheet is a magnesium sheet.

[0011] According to some embodiments of the present invention, the filler material comprises the following components by weight percentage: 75% gypsum powder, 20% bentonite and 5% sodium sulfate.

[0012] According to some embodiments of the present invention, a fixing rod is provided on the pipe, a metal plate is connected to the first end of the anode wire, the metal plate is provided with a fixing hole that cooperates with the fixing rod, and the anode wire is connected to the buried steel pipe through the fixing hole.

[0013] According to some embodiments of this utility model, the diameter of the anode pit is 15 cm and the depth is 40 cm to 60 cm.

[0014] According to some embodiments of the present invention, the filler material is covered with a protective sleeve.

[0015] The cathodic protection device for buried steel pipelines according to this embodiment of the utility model has at least the following beneficial effects:

[0016] 1. The compact and efficient cathodic protection device eliminates the need for a large sacrificial anode to be installed at each buried steel pipe outlet. This significantly reduces material and installation costs, especially in environments such as urban communities where cost control and maintenance complexity are critical.

[0017] 2. Due to the small size of the sacrificial anode components, the required excavation pit during installation is also correspondingly smaller. This not only reduces construction difficulty but also minimizes the impact on community greenery and residents' lives, while reducing post-excavation restoration costs.

[0018] 3. Due to the small size and ease of installation, future maintenance and repair will be much simpler. This reduces long-term operating costs.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0020] The accompanying drawings are provided to further understand the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this utility model to explain the technical solution of this utility model, and do not constitute a limitation on the technical solution of this utility model.

[0021] Figure 1 This is a structural diagram of a cathodic protection device provided in one embodiment of the present invention;

[0022] Figure 2 This is a front view of a sacrificial anode assembly provided in one embodiment of the present invention;

[0023] Figure 3 This is a side view of a sacrificial anode assembly provided in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the working scenario of a cathodic protection device provided in one embodiment of the present invention;

[0025] Reference numerals: Sacrificial anode assembly 110; anode wire 120; filler material 130; protective sleeve 140; sacrificial anode 210; electrode plate 220; perforation 230; insert 310; fastener 320; metal plate 121; pipe 410; screw 420; nut 430. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0031] Reference Figure 1-3 The cathodic protection device provided by this utility model mainly consists of a sacrificial anode assembly 110, an anode wire 120, and filler material 130. Specifically, the sacrificial anode assembly 110 includes a sacrificial anode 210 and an electrode plate 220. The electrode plate 220 is connected to the upper end face of the sacrificial anode 210, forming an integral structure. One end of the anode wire 120 can be electrically connected to the buried steel pipeline to be protected, and the other end can be electrically connected to the electrode plate 220, thereby achieving an electrical connection with the sacrificial anode 210. The entire sacrificial anode assembly 110 can be placed inside the filler material 130 and can be buried integrally in an underground anode pit.

[0032] In some embodiments of this utility model, in order to further enhance the performance of the filling material 130 and protect it from interference from the external environment, a protective sleeve 140 can be wrapped around the filling material 130. This protective sleeve 140 can be made of suitable materials such as cloth bags, which can effectively isolate the influence of the external environment on the filling material 130, while maintaining the stability and durability of the filling material 130.

[0033] In some embodiments of this utility model, the sacrificial anode 210 can be a magnesium alloy sacrificial anode, that is, the sacrificial anode 210 is made of magnesium alloy material, whose composition mainly includes metallic magnesium and contains a small amount of other metal elements.

[0034] In some embodiments of this utility model, the electrode sheet 220 can also be made of magnesium material, which is consistent with the material of the sacrificial anode 210.

[0035] In some embodiments of this utility model, the anode wire 120 can be connected to the electrode sheet 220 by fasteners to ensure the stability of the electrical connection.

[0036] In some embodiments of this utility model, such as Figure 2 and Figure 3As shown, in terms of connection details, the electrode plate 220 may have a through hole 230, and the fastener may consist of two parts: a through-hole 310 and a fastener 320. The anode wire 120 can pass through the through hole 230 on the electrode plate 220 along with the through-hole 310 to connect the anode wire 120 to the electrode plate 220, and the fastener 320 can be screwed into the through-hole 310 to further secure the connection between the anode wire 120 and the electrode plate 220. In a specific implementation, the through-hole 310 can be a screw, and the fastener 320 can be a nut that mates with it.

[0037] Furthermore, the anode wire 120 is preferably copper wire to ensure good conductivity and durability.

[0038] In some embodiments of this invention, the packing material 130 is carefully formulated and may contain the following components by mass percentage: 75% gypsum powder, 20% bentonite, and 5% sodium sulfate. This combination makes the packing material 130 play a crucial role in the cathodic protection device. It not only effectively reduces the grounding resistance of the anode, thereby increasing the output current, but also ensures more uniform anode consumption. Furthermore, the packing material 130 also has the function of keeping the soil moist, which helps the sacrificial anode 210 to achieve its optimal protective effect.

[0039] In some embodiments of this invention, the sacrificial anode 210 can be designed as a cuboid, with a length of 5 cm, a width of 5 cm, a height of 20 cm, and a weight of 1.2 kg. This dimensional design not only ensures the structural strength of the sacrificial anode 210 but also greatly facilitates its installation and fixing in the anode pit. Simultaneously, the 1.2 kg weight makes it easy to handle and operate during installation. The electrode plate 220, which matches the sacrificial anode 210, can have the same length as the sacrificial anode 210, 5 cm, but its width can be slightly smaller, for example, set to 2 cm. This design ensures close contact between the two while avoiding unnecessary material waste. The height can be set to 3 cm, coordinating with the height ratio of the sacrificial anode 210, thus achieving a fit in both material and size. This design ensures a stable and reliable electrical connection between the sacrificial anode 210 and the electrode plate 220, providing a strong guarantee for the efficient operation of the cathodic protection device. Based on this, when the sacrificial anode assembly 110 of this size is placed inside the packing material 130 with a cloth bag, the main structure of the entire cathodic protection device presents a compact and practical form. For example, its length is 8 cm, its width is 8 cm, and its height is extended to 25 cm. This size design ensures that the cathodic protection device can be stably installed in the anode pit.

[0040] In some embodiments of this utility model, the diameter of the anode pit can be set to 15 cm, and the depth is between 40 cm and 60 cm. Such dimensions ensure that the sacrificial anode assembly 110 has enough space for installation and fixation, while also ensuring that the anode pit is not too large, thus increasing the construction difficulty and cost.

[0041] In some embodiments of this utility model, a fixing rod can be installed on the pipe to securely connect the anode wire 120. For example... Figure 1 As shown, one end of the anode wire 120 can be connected to a metal plate 121, on which a fixing hole is formed to fit the fixing rod. In this way, the anode wire 120 can establish a stable and reliable connection with the buried steel pipeline through the fixing hole on the metal plate 121. This design not only enhances the stability of the connection, but also improves the working efficiency of the entire cathodic protection device.

[0042] In some embodiments of this utility model, the fixing rod is preferably a screw.

[0043] Reference Figure 4 , Figure 4 This is a schematic diagram of the working scenario of a cathodic protection device provided in one embodiment of this utility model. During installation, the anode wire 120 and the sacrificial anode assembly 110 are first tightly and securely connected together with screws. Then, the sacrificial anode assembly 110 is placed in a cloth bag containing packing material 130. Next, an anode pit with a diameter of 15 cm and a depth of 40 to 60 cm is dug near the outlet pipe to securely place the entire cloth bag containing the magnesium anode into the anode pit. To further enhance the stability of the connection, a screw 420 with a length of approximately 3 cm is welded to the outlet pipe of the buried steel pipe 410. After the metal plate 121 on the anode wire 120 is threaded through the screw 420, the metal plate 121 can be firmly fixed to the screw 420 with a nut 430 to achieve an electrical connection between the outlet pipe and the sacrificial anode assembly 110. After soaking in water and backfilling with soil, the sacrificial anode assembly 110 can be put into operation and perform its due protective function.

[0044] During routine inspections, this cathodic protection device functions as a test post. For example, by simply disconnecting the sacrificial anode assembly 110 from the pipe 410, the wear and tear of the sacrificial anode assembly 110 can be accurately detected, allowing for timely maintenance. Replacing the sacrificial anode assembly 110 is equally simple and quick. A tiny pit is all that's needed to easily remove the old anode assembly. Then, simply loosening the nut 430 allows for its replacement with a new sacrificial anode assembly 110, significantly saving time and labor costs. Furthermore, this cathodic protection device offers a wide protection range, covering an area within 50 meters, sufficient to meet the protection needs of most steel-plastic conversion lead-out pipes.

[0045] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present utility model.

Claims

1. A cathodic protection device for application to a buried steel pipeline, characterised in that, The application relates to a sacrificial anode assembly, an anode wire and a backfilling material, the sacrificial anode assembly comprising a sacrificial anode and an electrode sheet, the electrode sheet being connected with an upper end surface of the sacrificial anode, a first end of the anode wire being used for electrically connecting with a buried steel pipeline to be protected, a second end of the anode wire being electrically connected with the electrode sheet, the sacrificial anode assembly being located in the backfilling material and being integrally buried in an underground anode pit. The sacrificial anode is a magnesium alloy sacrificial anode.

2. The cathodic protection device of claim 1, wherein, The anode wire is connected and fixed with the electrode sheet through a fastener.

3. The cathodic protection apparatus of claim 1, wherein, The electrode sheet is provided with a perforation, the fastener comprises a penetrating piece and a screwing piece matched with the penetrating piece, the penetrating piece is arranged in the perforation and connects the anode wire with the electrode sheet, and the screwing piece is used for fixing the anode wire and the electrode sheet.

4. The cathodic protection apparatus of claim 3, wherein, The penetrating piece is a screw, and the screwing piece is a nut.

5. The cathodic protection device of claim 4, wherein, The electrode sheet is a magnesium sheet.

6. The cathodic protection apparatus of claim 4, wherein, The pipeline is provided with a fixing rod, a metal sheet is connected with the first end of the anode wire, the metal sheet is provided with a fixing hole matched with the fixing rod, and the anode wire is connected with the buried steel pipeline through the fixing hole.

7. The cathodic protection apparatus of claim 1, wherein, The diameter of the anode pit is 15 cm, and the depth is 40-60 cm.

8. The cathodic protection apparatus of claim 1, wherein, The backfilling material is externally covered with a protective sleeve.

9. The cathodic protection apparatus of claim 1, wherein, ​

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