Cathodic protection device for pipelines

Abstract

This application relates to the field of pipeline protection technology and provides a pipeline cathodic protection device. The pipeline cathodic protection device includes an insulating shell and a test piece. The insulating shell has a mounting cavity and a reference electrode. The test piece is disposed within the mounting cavity, adjacent to the reference electrode. The pipeline cathodic protection device according to the embodiment of this application can effectively reduce the influence of stray currents in the soil on the measurement of pipeline cathodic protection potential, thus improving the accuracy of the measurement results.

Description

Technical Field

[0001] This application relates to the field of pipeline protection technology, and in particular to pipeline cathodic protection devices. Background Technology

[0002] To prevent corrosion of pipes buried in the soil, cathodic protection is required. The measurement of the cathodic protection potential directly affects the effectiveness of the cathodic protection. In practice, to improve accuracy and efficiency, the potential of a test piece connected to the pipe is often used instead of the pipe's cathodic protection potential.

[0003] In related technologies, when measuring the cathodic protection potential of pipelines using test pieces, the test pieces are directly buried in the soil near the pipeline. Stray currents in the soil can affect the potential of the test pieces, leading to a decrease in the accuracy of the potential measurement. Furthermore, the distance between the test piece and the reference electrode is usually too great, which also affects the accuracy of the measurement results. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the related art. To this end, this application proposes a pipeline cathodic protection device that can effectively reduce the influence of stray currents in the soil on the measurement of pipeline cathodic protection potential, thereby improving the accuracy of the measurement results.

[0005] The pipeline cathodic protection device according to this application includes:

[0006] An insulating housing having a mounting cavity and a reference electrode formed thereon;

[0007] The test piece is placed inside the mounting cavity, and the test piece is arranged adjacent to the reference electrode.

[0008] According to the pipeline cathodic protection device of this application, when measuring the cathodic protection potential of a pipeline, since the test piece is installed inside the mounting cavity, the insulating shell can effectively block stray currents in the soil, reducing the stray current flowing to the test piece. Simultaneously, a reference electrode is formed in the insulating shell; that is, both the test piece and the reference electrode are located within the insulating shell, reducing the distance between the test piece and the reference electrode, and eliminating the need for an additional reference electrode on the ground to complete the measurement. This application can effectively reduce the influence of stray currents in the soil on the measurement of the pipeline cathodic protection potential, improving the accuracy of the measurement results.

[0009] According to one embodiment of this application, the insulating housing includes a first insulating pipe and a second insulating pipe, the first insulating pipe having the mounting cavity, the second insulating pipe being sleeved on the first insulating pipe, and the first insulating pipe being located inside the second insulating pipe.

[0010] According to one embodiment of this application, the first end of the first insulating conduit is provided with a first opening communicating with the mounting cavity.

[0011] According to one embodiment of this application, a solution cavity is formed in the wall of the insulating shell, the insulating shell is provided with a ceramic plug, the ceramic plug is at least partially located in the solution cavity, a copper rod is provided in the solution cavity, and the solution cavity can be used to store a saturated copper sulfate solution, such that the copper rod, the ceramic plug and the saturated copper sulfate solution constitute the reference electrode.

[0012] According to one embodiment of this application, the insulating housing is provided with a terminal block, which is electrically connected to the copper rod, and the terminal block is located in a space outside the solution cavity.

[0013] According to one embodiment of this application, the insulating shell is provided with a water injection hole, which communicates with the solution cavity.

[0014] According to one embodiment of this application, a gap is provided between the first insulating pipe and the second insulating pipe, and ceramic plugs are provided between one end of the first insulating pipe and one end of the second insulating pipe, as well as between the other end of the first insulating pipe and the other end of the second insulating pipe. The outer wall surface of the first insulating pipe and the inner wall surface of the second insulating pipe are sealed to the ceramic plugs.

[0015] According to one embodiment of this application, the second end of the first insulating pipe is provided with a second opening communicating with the mounting cavity, and the pipe cathodic protection device includes a sealing element, which covers the second opening.

[0016] According to one embodiment of this application, the pipeline cathodic protection device includes a waterproof cap, which is installed on the side of the seal facing away from the first insulated pipeline.

[0017] According to one embodiment of this application, the sealing element has a first connection hole, the waterproof cap has a second connection hole, and the pipeline cathodic protection device includes an electrical connector, one end of which is electrically connected to the test piece, and the other end of which passes through the first connection hole and the second connection hole.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the pipeline cathodic protection device provided in the embodiments of this application.

[0021] Figure label:

[0022] 1. Insulating housing; 2. Test piece; 3. Sealing element; 4. Waterproof cap; 11. Mounting cavity;

[0023] 12. Reference electrode; 14. First insulating conduit; 15. Second insulating conduit; 16. Solution chamber;

[0024] 17. Ceramic plug; 18. Copper rod; 19. Terminal; 110. Water inlet. Detailed Implementation

[0025] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but should not be used to limit the scope of this application.

[0026] In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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 the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0028] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The following is combined Figure 1 This application describes a pipeline cathodic protection device.

[0031] According to the embodiments of this application, such as Figure 1 As shown, the pipeline cathodic protection device includes an insulating housing 1 and a test piece 2. The insulating housing 1 has an installation cavity 11 and a reference electrode 12. The test piece 2 is disposed in the installation cavity 11 and is arranged adjacent to the reference electrode 12.

[0032] According to the pipeline cathodic protection device of this application embodiment, when measuring the pipeline cathodic protection potential, since the test piece 2 is installed inside the mounting cavity 11, the insulating shell 1 can effectively block stray currents in the soil, reducing the stray current flowing to the test piece 2. Simultaneously, a reference electrode 12 is formed in the insulating shell 1, meaning both the test piece 2 and the reference electrode 12 are located within the insulating shell 1, reducing the distance between the test piece 2 and the reference electrode 12, and eliminating the need for an additional reference electrode 12 on the ground to complete the measurement. This application can effectively reduce the influence of stray currents in the soil on the measurement of pipeline cathodic protection potential, improving the accuracy of the measurement results.

[0033] It is understandable that the mounting cavity 11 can be sealed, and the cathodic protection potential can be measured by electrically connecting the test piece 2 to the external soil through a wire; the mounting cavity 11 can also be open, and when the insulating shell 1 is inserted into the soil, soil will be filled into the mounting cavity 11, so that the test piece 2 is in contact with the soil. At this time, the test piece 2 is only in contact with the soil inside the mounting cavity 11, and the insulating shell 1 can separate most of the soil from the test piece 2, thereby improving the accuracy of the potential measurement.

[0034] Understandably, in related technologies, when measuring cathodic protection potential, a reference electrode 12 needs to be additionally installed on the ground. The distance between the reference electrode 12 and the test piece 2 is relatively large, and stray currents flowing through them can create a voltage difference between the reference electrode 12 and the test piece 2, causing measurement errors. However, this application integrates the reference electrode 12 and the test piece 2 together in the insulating housing 1, effectively reducing the distance between them and ensuring measurement accuracy.

[0035] Specifically, when measuring the cathodic protection potential of a pipeline using the pipeline cathodic protection device of this application, the test piece 2 is connected to two wires, one of which is connected to the pipeline and the other is connected to the positive probe of a multimeter. The negative probe of the multimeter is connected to the reference electrode 12. Then, the multimeter is switched to the DC voltage range, and the wire connecting the test piece 2 to the pipeline is disconnected. At this time, the reading of the multimeter is the cathodic protection potential.

[0036] In one embodiment of this application, such as Figure 1 As shown, the insulating housing 1 includes a first insulating pipe 14 and a second insulating pipe 15. The first insulating pipe 14 forms an installation cavity 11, and the second insulating pipe 15 is sleeved on the first insulating pipe 14. The first insulating pipe 14 is located inside the second insulating pipe 15.

[0037] Understandably, when the test piece 2 is installed inside the first insulating conduit 14, the first insulating conduit 14 can block stray currents; when the second insulating conduit 15 is fitted over the first insulating conduit 14, the second insulating conduit 15 can also block stray currents. In other words, by fitting the first insulating conduit 14 and the second insulating conduit 15 together to form an insulating shell 1, the insulation resistance of the insulating shell 1 is effectively increased, achieving double-layer insulation and effectively reducing the impact of stray currents on the test piece 2.

[0038] In one embodiment of this application, the first end of the first insulating conduit 14 is provided with a first opening communicating with the mounting cavity 11.

[0039] Understandably, when the pipeline cathodic protection device is placed in the soil, some soil can enter the installation cavity 11 through the first opening, allowing the test piece 2 to contact the soil and thus enabling the measurement of the pipeline's cathodic protection potential. However, it is important to note that the test piece 2 only connects to a portion of the soil within the installation cavity 11; most of the soil remains blocked outside the cavity by the first insulating pipe 14 and the second insulating pipe 15. This means that most stray currents from the soil are difficult to reach the test piece 2 due to the obstruction of the first and second insulating pipes 14 and 15, thus improving the accuracy of the measurement.

[0040] In one embodiment of this application, such as Figure 1 As shown, a solution cavity 16 is formed in the wall of the insulating shell 1. The insulating shell 1 is provided with a ceramic plug 17, which is at least partially located in the solution cavity 16. A copper rod 18 is provided in the solution cavity 16. The solution cavity 16 can be used to store a saturated copper sulfate solution, so that the copper rod 18, the ceramic plug 17 and the saturated copper sulfate solution constitute a reference electrode 12.

[0041] It is understandable that injecting a saturated copper sulfate solution into the solution chamber 16 makes the first insulating pipe 14, the second insulating pipe 15, the copper rod 18, the ceramic plug 17, and the saturated copper sulfate solution in the solution chamber 16 form the reference electrode 12 structure, thereby realizing the setting of the reference electrode 12 in the insulating shell 1 and shortening the distance between the reference electrode 12 and the test piece 2.

[0042] In one embodiment of this application, such as Figure 1 As shown, the insulating housing 1 is provided with a terminal 19, which is electrically connected to the copper rod 18. The terminal 19 is located in the space outside the solution chamber 16.

[0043] Understandably, connecting the negative probe of the multimeter to terminal 19 allows the multimeter to be connected to the copper rod 18. Terminal 19 is located in the space outside the solution chamber 16, making the connection between the multimeter and the reference electrode 12 simpler.

[0044] In one embodiment of this application, such as Figure 1 As shown, the insulating housing 1 is provided with a water injection hole 110, which is connected to the solution chamber 16.

[0045] Understandably, the water injection port 110 can switch between an open and closed state. When it is necessary to inject saturated copper sulfate solution into the solution chamber 16, the water injection port 110 is opened to allow the solution to be injected directly into the solution chamber 16 through the water injection port 110. After the solution injection is completed, the water injection port 110 is closed to prevent the solution in the solution chamber 16 from leaking during the use of the pipeline cathodic protection device.

[0046] In one embodiment of this application, such as Figure 1 As shown, a gap is provided between the first insulating pipe 14 and the second insulating pipe 15. A ceramic plug 17 is provided between one end of the first insulating pipe 14 and one end of the second insulating pipe 15, and between the other end of the first insulating pipe 14 and the other end of the second insulating pipe 15. The outer wall surface of the first insulating pipe 14 and the inner wall surface of the second insulating pipe 15 are sealed to the ceramic plug 17.

[0047] It is understandable that the ceramic plug 17 seals the outer wall of the first insulating pipe 14 and the inner wall of the second insulating pipe 15, so that the ceramic plug 17 and the gap form a sealed solution cavity 16. In other words, the ceramic plug 17 can not only be used to form the reference electrode 12, but also serve a sealing function.

[0048] In one embodiment of this application, such as Figure 1 As shown, the second end of the first insulating pipe 14 is provided with a second opening that communicates with the mounting cavity 11. The pipe cathodic protection device includes a seal 3, which covers the second opening.

[0049] It is understandable that by covering the second opening with a seal 3, the seal 3 can prevent external water or other objects from entering the installation cavity 11 through the second opening, thus avoiding external interference to the pipeline cathodic protection potential measurement process.

[0050] For example, seal 3 is a plastic seal 3.

[0051] In one embodiment of this application, such as Figure 1 As shown, the pipeline cathodic protection device includes a waterproof cap 4, which is installed on the side of the seal 3 facing away from the first insulating pipeline 14.

[0052] It is understandable that by setting a waterproof cap 4 at the upper end of the seal 3, the waterproof cap 4 can play a waterproof role and prevent external water from flowing into the mounting cavity 11.

[0053] In one embodiment of this application, the sealing member 3 has a first connection hole, the waterproof cap 4 has a second connection hole, and the pipeline cathodic protection device includes an electrical connector, one end of which is electrically connected to the test piece 2, and the other end of which passes through the first connection hole and the second connection hole.

[0054] Understandably, the electrical connector can connect test piece 2 to the pipe, or it can connect test piece 2 to the multimeter. The other end of the electrical connector passes through the first connection hole and the second connection hole in sequence, so that the other end of the electrical connector can protrude from the mounting cavity 11 for easy connection with the multimeter.

[0055] It is understandable that the other end of the electrical connector is sealed to the inner wall of the first connection hole and the other end of the electrical connector is sealed to the inner wall of the second connection hole. This can prevent external water from seeping into the mounting cavity 11 through the connection between the electrical connector and the first connection hole, and prevent external water from seeping into the mounting cavity 11 through the connection between the electrical connector and the second connection hole.

[0056] It is understandable that a seal 3 can be provided between the other end of the electrical connector and the inner wall of the first mounting hole, and between the other end of the electrical connector and the inner wall of the second mounting hole.

[0057] In one embodiment of this application, the outer wall surface of the test piece 2 abuts against the inner wall surface of the mounting cavity 11.

[0058] It is understandable that by abutting the outer wall of the test piece 2 against the inner wall of the mounting cavity 11, the volume of the mounting cavity 11 can be reduced, the amount of soil in contact with the test piece 2 can be reduced, and the influence of stray current in the soil on the cathodic protection potential measurement can be reduced.

[0059] In one embodiment of this application, the mounting cavity 11 is a sealed cavity, the insulating shell 1 is provided with a through hole communicating with the sealed cavity, the pipeline cathodic protection device includes a wire, one end of the wire is electrically connected to the test piece 2, and the other end of the wire passes through the through hole and is located in the space outside the mounting cavity 11, and the wire is sealed to the inner wall surface of the through hole.

[0060] Understandably, installing test piece 2 inside the sealed cavity separates it from the soil, effectively reducing the impact of stray currents from the soil on the measurement. When measuring the cathodic protection potential, since the other end of the conductor passes through the through hole and is located outside the mounting cavity 11, the other end of the conductor can contact the soil. That is, test piece 2 can be indirectly connected to the soil through the guide, which can effectively block the influence of the soil while completing the measurement of the cathodic protection potential.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate this application and are not intended to limit this application. Although this application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be covered within the scope of the claims of this application.

Claims

1. A pipeline cathodic protection device, characterized in that, include: An insulating housing having a mounting cavity and a reference electrode formed thereon; A test piece is disposed within the mounting cavity, and the test piece is arranged adjacent to the reference electrode. The insulating housing includes a first insulating pipe and a second insulating pipe, the first insulating pipe having the mounting cavity, the second insulating pipe being sleeved on the first insulating pipe, and the first insulating pipe being located inside the second insulating pipe. A solution cavity is formed within the wall of the insulating shell. The insulating shell is provided with a ceramic plug, which is at least partially located within the solution cavity. A copper rod is provided within the solution cavity. The solution cavity can be used to store a saturated copper sulfate solution, such that the copper rod, the ceramic plug, and the saturated copper sulfate solution constitute the reference electrode. A gap is provided between the first insulating pipe and the second insulating pipe. Ceramic plugs are provided between one end of the first insulating pipe and one end of the second insulating pipe, as well as between the other end of the first insulating pipe and the other end of the second insulating pipe. The outer wall surface of the first insulating pipe and the inner wall surface of the second insulating pipe are sealed to the ceramic plugs.

2. The pipeline cathodic protection device according to claim 1, characterized in that, The first end of the first insulating pipe is provided with a first opening that communicates with the mounting cavity.

3. The pipeline cathodic protection device according to claim 1, characterized in that, The insulating housing is provided with a terminal block, which is electrically connected to the copper rod and is located in the space outside the solution cavity.

4. The pipeline cathodic protection device according to claim 1 or 3, characterized in that, The insulating shell is provided with a water injection hole, which is connected to the solution cavity.

5. The pipeline cathodic protection device according to any one of claims 1 to 3, characterized in that, The second end of the first insulating pipe is provided with a second opening that communicates with the mounting cavity, and the pipe cathodic protection device includes a sealing element that covers the second opening.

6. The pipeline cathodic protection device according to claim 5, characterized in that, The pipeline cathodic protection device includes a waterproof cap, which is installed on the side of the seal facing away from the first insulated pipeline.

7. The pipeline cathodic protection device according to claim 6, characterized in that, The sealing element has a first connection hole, the waterproof cap has a second connection hole, and the pipeline cathodic protection device includes an electrical connector. One end of the electrical connector is electrically connected to the test piece, and the other end of the electrical connector passes through the first connection hole and the second connection hole.

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