CN116356331B - Method and device for troubleshooting and recovering failure reasons of flexible anode and cathode protection system - Google Patents
Method and device for troubleshooting and recovering failure reasons of flexible anode and cathode protection system Download PDFInfo
- Publication number
- CN116356331B CN116356331B CN202310311386.7A CN202310311386A CN116356331B CN 116356331 B CN116356331 B CN 116356331B CN 202310311386 A CN202310311386 A CN 202310311386A CN 116356331 B CN116356331 B CN 116356331B
- Authority
- CN
- China
- Prior art keywords
- flexible anode
- pipeline
- anode
- potential
- flexible
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 68
- 238000013024 troubleshooting Methods 0.000 title description 13
- 238000011084 recovery Methods 0.000 claims abstract description 38
- 238000012360 testing method Methods 0.000 claims description 75
- 239000000523 sample Substances 0.000 claims description 72
- 230000035772 mutation Effects 0.000 claims description 14
- 239000002689 soil Substances 0.000 claims description 14
- 238000004364 calculation method Methods 0.000 claims description 13
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 238000009412 basement excavation Methods 0.000 claims description 9
- 230000010287 polarization Effects 0.000 claims description 7
- 238000004210 cathodic protection Methods 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 238000007689 inspection Methods 0.000 description 5
- 238000007726 management method Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/04—Controlling or regulating desired parameters
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
- F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/10—Controlling or regulating parameters
- C23F2213/11—Controlling or regulating parameters for structures subject to stray currents
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The application provides a method and a device for checking and recovering the failure reason of a flexible anode cathode protection system, which can solve the problem of checking and processing the failure problem of the cathode protection system by adopting a flexible anode in the gas pipeline industry, and has the advantages of strong pertinence and operability; the method can effectively solve the problem of failure of the flexible anode-cathode protection system in the gas pipeline industry, accurately provides a failure recovery method, and provides guidance for management of the failure flexible anode-cathode protection system.
Description
Technical Field
The application relates to the technical field of corrosion and protection, in particular to a method and a device for troubleshooting and recovering failure reasons of a flexible anode cathode protection system.
Background
In recent years, cathodic protection has been widely used as an effective method for preventing or slowing down corrosion of buried metal structures in towns and long-distance pipelines buried in natural gas, and has achieved good corrosion protection. The flexible anode is used as an auxiliary anode land bed for cathode protection, and the cathode protection technology of the fuel gas buried pipeline is effectively applied. However, with the increase of the service life of the flexible anode cathode protection system, the pipeline coating is gradually aged, and meanwhile, as the urban gas pipeline is positioned at the periphery of the city, the flexible anode cathode protection system is frequently disabled and the cathode protection effect of the pipeline is reduced under the influence of subway rail transit and other electric facilities. The flexible anode cathode protection system fails, the pipeline is in an unprotected state and is simultaneously interfered by stray current, and the corrosion risk of the pipeline is increased. At present, no unified and effective method is available for checking and recovering the failure problem of the cathode protection system due to the failure of the flexible anode caused by various reasons, and the management work pressure of the management department of the pipeline for the flexible anode protection system is increased.
Disclosure of Invention
The present application aims to provide a method and apparatus for troubleshooting and recovering the cause of failure of a flexible anode cathode protection system that overcomes or at least partially solves the above-mentioned problems.
In order to achieve the above purpose, the technical scheme of the application is specifically realized as follows:
one aspect of the application provides a method for troubleshooting and recovering a failure cause of a flexible anode cathode protection system, comprising the following steps: obtaining test information of a flexible anode cathode protection system, wherein the test information comprises: the output current, the output voltage and the protection potential of the potentiostat, the grounding resistance of the flexible anode, the potential of the pipeline in the closed state of the potentiostat, the on/off potential along the pipeline, the peripheral interference source of the pipeline and the failure cause of the flexible anode cathode protection system; judging failure reasons and determining recovery modes according to the test information, wherein the method comprises the following steps: if the output current is smaller than a first preset value, the output voltage reaches a rated value of the potentiostat, the grounding resistance of the flexible anode is larger than a second preset value, and the failure cause is judged: breaking the flexible anode; the recovery mode is determined as follows: determining the breakpoint position by adopting a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method, and continuously connecting a flexible anode;
if the flexible anode grounding resistance is smaller than a third preset value, the output voltage, the output current and the protection potential fluctuate violently, and the peripheral interference sources of the pipeline are subway systems, the on/off potential fluctuation of the pipeline along the line is violent, and in the subway outage time period at night, the output current and the protection potential fluctuation are smaller, and the failure cause is judged as follows: the interference of subway stray current; the recovery mode is determined as follows: adding an anti-interference probe at the electrified point;
if the flexible anode grounding resistance is smaller than a fourth preset value, the output voltage is smaller than a fifth preset value, the output current is smaller than a sixth preset value, the pipeline protection potential is negative, the potentiostat is closed, the pipeline potential is still negative, and the failure reason is judged as follows: a sacrificial anode is arranged at the position of the electrifying point; the recovery mode is determined as follows: determining the position of a sacrificial anode, excavating the sacrificial anode and removing the sacrificial anode; if the flexible anode grounding resistance is smaller than a seventh preset value, the output voltage, the output current and the pipeline protection potential are normal, the on-off potential of the pipeline at a position far away from the electrifying point along the pipeline is correct, and the failure cause is judged: the flexible anode current decays fast; the recovery mode is determined as follows: the protection current feed point is increased.
Wherein, the adoption of the grounding resistance calculation method, the alternating current attenuation method and the alternating current ground potential gradient method for determining the breakpoint position comprises the following steps: basic data of a pipeline is obtained, the position of an insulating joint of the pipeline is determined, and the excavation laying position of the flexible anode is judged; acquiring the flexible anode grounding resistance test value, and calculating the length of the flexible anode which is connected with the cable after fracture by combining the flexible anode basic parameters, the soil resistivity of the flexible anode laying position; feeding an alternating current signal into the flexible anode, positioning the position of the flexible anode, searching an alternating current attenuation mutation point of the flexible anode, and primarily judging the alternating current attenuation mutation point as a flexible anode fracture position; testing the alternating current ground potential gradient value of the flexible anode along the line, and preliminarily judging the breaking position of the flexible anode when the alternating current ground potential gradient value appears nearest to the insulating joint; and determining the fracture position of the flexible anode according to the primarily judged fracture position of the flexible anode.
Wherein, increase anti-interference probe at circular telegram position location includes: acquiring basic data of a flexible anode cathode protection system and a pipeline, and determining the position of an electrified point; excavating a power-on point position, installing an anti-interference probe, wherein the anti-interference probe is away from the outer wall of a pipeline at the power-on point position by a preset distance, and the anti-interference probe comprises: the device comprises a reticular polarization probe and a long-acting reference electrode, wherein the long-acting reference electrode is arranged in the reticular probe, and a medium with preset resistivity is added between the long-acting reference electrode and the reticular probe; the test piece cable of the anti-interference probe is connected to the zero position negative binding post of the constant potential instrument, the long-acting reference electrode is connected to the reference electrode binding post of the constant potential instrument, and the long-acting reference electrode of the original flexible anode cathode protection system is canceled.
Wherein, the increasing the protection current feed point includes: obtaining basic parameters of flexible anode and cathode protection, and testing the resistivity of soil in the flexible anode laying environment; calculating the current attenuation length of the flexible anode; testing the on-off electric potential of the pipeline along the line; selecting a position where the potential of the pipeline cannot reach the standard, carrying out a feed test, and determining the current demand and the protection range; and determining the distance between the feed points of the protection current according to the current attenuation length of the flexible anode, the on-off electric potential of the pipeline along the line, the current demand and the protection range.
In another aspect, the present application provides a device for troubleshooting and recovering a failure cause of a flexible anode-cathode protection system, including: the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring test information of the flexible anode cathode protection system, and the test information comprises: the output current, the output voltage and the protection potential of the potentiostat, the grounding resistance of the flexible anode, the potential of the pipeline in the closed state of the potentiostat, the on/off potential along the pipeline, the peripheral interference source of the pipeline and the failure cause of the flexible anode cathode protection system; the judging module is used for judging failure reasons and determining recovery modes according to the test information, wherein: if the output current is smaller than a first preset value, the output voltage reaches a rated value of the potentiostat, the grounding resistance of the flexible anode is larger than a second preset value, and the failure cause is judged: breaking the flexible anode; the recovery mode is determined as follows: determining the breakpoint position by adopting a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method, and continuously connecting a flexible anode; if the flexible anode grounding resistance is smaller than a third preset value, the output voltage, the output current and the protection potential fluctuate violently, and the peripheral interference sources of the pipeline are subway systems, the on/off potential fluctuation of the pipeline along the line is violent, and in the subway outage time period at night, the output current and the protection potential fluctuation are smaller, and the failure cause is judged as follows: the interference of subway stray current; the recovery mode is determined as follows: adding an anti-interference probe at the electrified point; if the flexible anode grounding resistance is smaller than a fourth preset value, the output voltage is smaller than a fifth preset value, the output current is smaller than a sixth preset value, the pipeline protection potential is negative, the potentiostat is closed, the pipeline potential is still negative, and the failure reason is judged as follows: a sacrificial anode is arranged at the position of the electrifying point; the recovery mode is determined as follows: determining the position of a sacrificial anode, excavating the sacrificial anode and removing the sacrificial anode; if the flexible anode grounding resistance is smaller than a seventh preset value, the output voltage, the output current and the pipeline protection potential are normal, the on-off potential of the pipeline at a position far away from the electrifying point along the pipeline is correct, and the failure cause is judged: the flexible anode current decays fast; the recovery mode is determined as follows: the protection current feed point is increased.
The judging module adopts a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method to determine the breakpoint position in the following manner: basic data of a pipeline is obtained, the position of an insulating joint of the pipeline is determined, and the excavation laying position of the flexible anode is judged; acquiring the flexible anode grounding resistance test value, and calculating the length of the flexible anode which is connected with the cable after fracture by combining the flexible anode basic parameters, the soil resistivity of the flexible anode laying position; feeding an alternating current signal into the flexible anode, positioning the position of the flexible anode, searching an alternating current attenuation mutation point of the flexible anode, and primarily judging the alternating current attenuation mutation point as a flexible anode fracture position; testing the alternating current ground potential gradient value of the flexible anode along the line, and preliminarily judging the breaking position of the flexible anode when the alternating current ground potential gradient value appears nearest to the insulating joint; and determining the fracture position of the flexible anode according to the primarily judged fracture position of the flexible anode.
The judgment module adds an anti-interference probe at the power-on point by the following method: acquiring basic data of a flexible anode cathode protection system and a pipeline, and determining the position of an electrified point; excavating a power-on point position, installing an anti-interference probe, wherein the anti-interference probe is away from the outer wall of a pipeline at the power-on point position by a preset distance, and the anti-interference probe comprises: the device comprises a reticular polarization probe and a long-acting reference electrode, wherein the long-acting reference electrode is arranged in the reticular probe, and a medium with preset resistivity is added between the long-acting reference electrode and the reticular probe; the test piece cable of the anti-interference probe is connected to the zero position negative binding post of the constant potential instrument, the long-acting reference electrode is connected to the reference electrode binding post of the constant potential instrument, and the long-acting reference electrode of the original flexible anode cathode protection system is canceled.
The judging module increases the protection current feed-in point by the following mode: obtaining basic parameters of flexible anode and cathode protection, and testing the resistivity of soil in the flexible anode laying environment; calculating the current attenuation length of the flexible anode; testing the on-off electric potential of the pipeline along the line; selecting a position where the potential of the pipeline cannot reach the standard, carrying out a feed test, and determining the current demand and the protection range; and determining the distance between the feed points of the protection current according to the current attenuation length of the flexible anode, the on-off electric potential of the pipeline along the line, the current demand and the protection range.
Therefore, the method and the device for checking and recovering the failure cause of the flexible anode cathode protection system can solve the problem of checking and processing the failure problem of the cathode protection system by adopting the flexible anode in the gas pipeline industry, and provide the method for checking and recovering the failure cause of the flexible anode cathode protection system, and have the advantages of strong pertinence and operability; the method can effectively solve the problem of failure of the flexible anode-cathode protection system in the gas pipeline industry, accurately provides a failure recovery method, and provides guidance for management of the failure flexible anode-cathode protection system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a method for troubleshooting and recovering a failure cause of a flexible anode cathode protection system according to an embodiment of the present application;
FIG. 2 is a flowchart of a method for troubleshooting and recovering a failure cause of a flexible anode cathode protection system according to an embodiment of the present application;
FIG. 3 is a diagram of the output current of an unaddressed anti-interference probe according to an embodiment of the present application;
FIG. 4 is a diagram of the protection potential of a pipeline without adding an anti-interference probe according to an embodiment of the present application;
FIG. 5 is a schematic diagram of an anti-interference probe connection provided by an embodiment of the present application;
1. an anode binding post; 2. cathode binding post, 3 zero position connecting cathode binding post, 4 reference electrode binding post, 5 flexible anode, 6 buried steel pipe, 7 anti-interference probe, 8 potentiostat, 9 anti-interference probe test piece line, 10 anti-interference probe reference line
FIG. 6 is a graph showing output current fluctuation after adding an anti-interference probe according to an embodiment of the present application;
FIG. 7 is a graph showing the protection potential of the pipeline after the anti-interference probe is added according to the embodiment of the application;
fig. 8 is a schematic structural diagram of a failure cause checking and recovering device for a flexible anode cathode protection system according to an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 shows a flowchart of a method for troubleshooting and recovering a failure cause of a flexible anode cathode protection system according to an embodiment of the present application, fig. 2 shows a specific flowchart of a method for troubleshooting and recovering a failure cause of a flexible anode cathode protection system according to an embodiment of the present application, and in combination with fig. 1 and fig. 2, the method for troubleshooting and recovering a failure cause of a flexible anode cathode protection system according to an embodiment of the present application is described below, where the method for troubleshooting and recovering a failure cause of a flexible anode cathode protection system according to an embodiment of the present application includes:
s1, acquiring test information of a flexible anode cathode protection system, wherein the test information comprises: the output current, the output voltage and the protection potential of the potentiostat, the grounding resistance of the flexible anode, the potential of the pipeline in the closed state of the potentiostat, the on/off potential along the pipeline, the interference source around the pipeline and the failure cause of the flexible anode cathode protection system.
Specifically, the application can survey basic information of the flexible anode cathode protection system and test the flexible anode cathode protection system: the method comprises the steps of testing the conditions of output current, output voltage and protection potential of a potentiostat, testing the grounding resistance of a flexible anode, and testing the potential of a pipeline in a closed state of the potentiostat; and testing the on/off electric potential of the pipeline along the line, investigating the condition of interference sources around the pipeline, and judging the failure reason of the flexible anode-cathode protection system.
S2, judging failure reasons and determining recovery modes according to the test information, wherein the method comprises the following steps:
if the output current is smaller than the first preset value, the output voltage reaches the rated value of the potentiostat, the grounding resistance of the flexible anode is larger than the second preset value, and the failure cause is judged: breaking the flexible anode; the recovery mode is determined as follows: and determining the breakpoint position by adopting a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method, and continuously connecting a flexible anode.
Specifically, according to the conditions of the output current, the output voltage and the protection potential of the potentiostat, if the output current is small, the output voltage reaches the rated value of the potentiostat, the flexible anode grounding resistance is more than dozens of ohms, the flexible anode is judged to be broken, the failure of the flexible anode cathode protection system is caused, the breakpoint position is determined by adopting a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method, the cable breaking position is excavated and searched, the flexible anode is connected continuously, and the normal operation of the flexible anode cathode protection system is restored.
As an alternative implementation of the embodiment of the present application, determining the breakpoint position using the ground resistance calculation method, the ac current decay method, and the ac ground potential gradient method includes: basic data of a pipeline is obtained, the position of an insulating joint of the pipeline is determined, and the excavation laying position of the flexible anode is judged; obtaining a flexible anode grounding resistance test value, and calculating the length of the flexible anode which is connected with the cable after fracture by combining the flexible anode basic parameters, the soil resistivity of the flexible anode laying position; feeding an alternating current signal into the flexible anode, positioning the position of the flexible anode, searching an alternating current attenuation mutation point of the flexible anode, and primarily judging the alternating current attenuation mutation point as a flexible anode fracture position; testing the alternating current ground potential gradient value of the flexible anode along the line, and preliminarily judging the breaking position of the flexible anode when the alternating current ground potential gradient value appears nearest to the insulating joint; and determining the fracture position of the flexible anode according to the primarily judged fracture position of the flexible anode.
Specifically, the grounding resistance of the flexible anode is more than dozens of ohms, the flexible anode is judged to be broken, and the specific breaking position of the flexible anode is searched according to the following method:
(1) Searching basic data of the pipeline, determining the position of an insulating joint of the pipeline, and judging the excavation laying position of the flexible anode;
(2) According to the flexible anode grounding resistance test value, combining the flexible anode basic parameters, the soil resistivity of the flexible anode laying position and the length of the cable which is left to be connected after the flexible anode is reversely pushed to fracture.
(3) And (3) adopting alternating current method test equipment, feeding alternating current signals into the flexible anode, positioning the position of the flexible anode, searching alternating current attenuation mutation points of the flexible anode, and primarily judging the alternating current attenuation mutation points as the breaking positions of the flexible anode.
(4) The alternating current ground potential gradient test equipment tests alternating current ground potential gradient values along the flexible anode, and the alternating current ground potential gradient values which are obvious appear closest to the insulating joint are initially judged to be the breaking positions of the flexible anode.
(5) And (3) combining the positions preliminarily judged in the steps (2) to (4) to comprehensively judge the breaking position of the flexible anode.
If the flexible anode grounding resistance is smaller than a third preset value, the fluctuation of the output voltage, the output current and the protection potential is severe, and the peripheral interference source of the pipeline is a subway system, the fluctuation of the on/off potential along the pipeline is severe, and the fluctuation of the output current and the protection potential is smaller in the subway shutdown time period at night, so that the failure is judged as follows: the interference of subway stray current; the recovery mode is determined as follows: and adding an anti-interference probe at the electrified point.
Specifically, according to the conditions of the output current, the output voltage and the protection potential of the potentiostat, the test result of the flexible anode grounding resistance and the conditions of interference sources around the pipeline, such as small flexible anode grounding resistance, severe fluctuation of the output voltage, the output current and the protection potential of the potentiostat, a subway system around the pipeline, severe fluctuation of the on/off potential of the pipeline along the line, small fluctuation of the output current and the protection potential of the potentiostat after 24 hours, and judgment of severe fluctuation of the output of the flexible anode cathode protection system due to interference of subway stray current, the addition of an anti-interference probe at the electrifying point is needed, the fluctuation of the pipeline potential at the electrifying point is reduced, the output current of the potentiostat is stabilized, and the normal operation of the flexible anode cathode protection system is restored.
As an alternative implementation manner of the embodiment of the present application, adding an anti-interference probe at the power-on point includes: acquiring basic data of a flexible anode cathode protection system and a pipeline, and determining the position of an electrified point; excavating a power-on point position, installing an anti-interference probe, and presetting a distance between the anti-interference probe and the outer wall of a pipeline at the power-on point position, wherein the anti-interference probe comprises: the device comprises a reticular polarization probe and a long-acting reference electrode, wherein the long-acting reference electrode is arranged in the reticular probe, and a medium with preset resistivity is added between the long-acting reference electrode and the reticular probe; the test piece cable of the anti-interference probe is connected to the zero position negative binding post of the potentiostat, the long-acting reference electrode is connected to the reference electrode binding post of the potentiostat, and the long-acting reference electrode of the original flexible anode-cathode protection system is canceled.
Specifically, due to the interference of subway stray current, the fluctuation of the output current of the potentiostat of the flexible anode-cathode protection system is severe, and the normal operation of the flexible anode-cathode protection system is restored according to the following method:
(1) Searching basic data of a flexible anode cathode protection system and a pipeline, and determining the position of an electrified point;
(2) Excavating a power-on point position, installing an anti-interference probe, and enabling the anti-interference probe to be 0.3-1 m away from the outer wall of the pipeline at the power-on point position;
(3) The anti-interference probe consists of a reticular polarization probe and a long-acting reference electrode, wherein the long-acting reference electrode is arranged in the reticular probe, and a medium with small resistivity is added between the long-acting reference electrode and the reticular probe;
(4) The test piece cable of the anti-interference probe is connected to the zero position negative binding post of the potentiostat, the long-acting reference electrode is connected to the reference electrode binding post of the potentiostat, and the long-acting reference electrode of the original flexible anode-cathode protection system is canceled.
If the flexible anode grounding resistance is smaller than the fourth preset value, the output voltage is smaller than the fifth preset value, the output current is smaller than the sixth preset value, the pipeline protection potential is negative, the potentiostat is closed, the pipeline potential is still negative, and the failure reason is judged as follows: a sacrificial anode is arranged at the position of the electrifying point; the recovery mode is determined as follows: and determining the position of the sacrificial anode, excavating the sacrificial anode and removing.
Specifically, according to the conditions of the output current, the output voltage and the protection potential of the potentiostat, the test result of the grounding resistance of the flexible anode shows that the potential of the pipeline is smaller in the closed state of the potentiostat, if the grounding resistance of the flexible anode is smaller, the output voltage and the output current of the potentiostat are smaller, the protection potential of the pipeline is more negative, the potentiostat is closed, the pipeline potential is still more negative, the position of a power-on point is judged to have a sacrificial anode, so that the potential of the power-on point is more negative, the flexible anode cathode protection system is smaller in output, data are required to be searched, the position of the sacrificial anode is determined, the sacrificial anode is excavated and removed, the pipeline potential of the power-on point is reduced, and the normal operation of the flexible anode cathode protection system is restored.
If the grounding resistance of the flexible anode is smaller than a seventh preset value, the output voltage and the output current are normal to the protection potential of the pipeline, the on-off potential of the pipeline at the position far away from the on-off point along the pipeline is correct, and the failure cause is judged as follows: the current of the flexible anode decays fast; the recovery mode is determined as follows: the protection current feed point is increased.
Specifically, according to the output current, the output voltage and the protection potential of the potentiostat, the test result of the flexible anode grounding resistor shows that the potential of the pipeline is smaller in the closed state of the potentiostat, if the flexible anode grounding resistor is smaller, the output voltage and the output current of the potentiostat are higher than the protection potential of the pipeline, the on-off potential of the pipeline at the position far away from the electrified point along the pipeline is higher, the flexible anode current is judged to decay fast, so that the flexible anode cathodic protection system is far away from the pipeline at the electrified point and cannot receive the protection current, the flexible anode is required to be excavated along the pipeline, and the protection current feed point is increased, so that the on-off potential along the pipeline is in the standard requirement range.
As an alternative implementation of the embodiment of the present application, adding a protection current feed point includes: obtaining basic parameters of flexible anode and cathode protection, and testing the resistivity of soil in the flexible anode laying environment; calculating the current attenuation length of the flexible anode; testing the on-off electric potential of the pipeline along the line; selecting a position where the potential of the pipeline cannot reach the standard, carrying out a feed test, and determining the current demand and the protection range; and determining the distance between the feed points of the protection current according to the current attenuation length of the flexible anode, the on-off electric potential of the pipeline along the line, the current demand and the protection range.
Specifically, as the flexible anode current decays fast, the flexible anode cathode protection system is far away from the electrified point position pipeline and cannot receive protection current, and the protection current feed point is increased according to the following method:
(1) Searching basic parameters of flexible anode and cathode protection, and testing the resistivity of soil in the flexible anode laying environment;
(2) Calculating the current attenuation length of the flexible anode;
(3) Testing the on-off electric potential of the pipeline along the line;
(4) Selecting a position where the potential of the pipeline cannot reach the standard, carrying out a feed test, and determining the current demand and the protection range;
(5) And (3) combining the results of (2) to (4) to determine the distance between the feed points of the protection current.
Therefore, the failure cause of the flexible anode can be accurately judged by the failure cause checking and recovering method of the flexible anode cathode protection system, and the failure recovering method is provided in a targeted manner, after the flexible anode is broken, the broken position can be accurately positioned, and the waste of manpower and weakness caused by blind excavation is reduced; the problem that the flexible anode cathode protection system cannot normally operate due to subway interference can be effectively recovered, the difficulty of operation management is reduced, and the cost for increasing subway interference protection measures is reduced; the problem of flexible positive pole current decay is big has effectually been solved, has improved flexible positive pole's utilization ratio, has improved the protection efficiency of pipeline, reduces the corruption risk of pipeline.
The following is an exemplary description of a method for checking and recovering a failure cause of a flexible anode cathode protection system according to an embodiment of the present application with reference to fig. 3 to 7:
the method for checking and recovering the failure cause of the flexible anode cathode protection system provided by the embodiment of the application is suitable for the cathode protection system adopting the town gas pipeline and adopting the flexible anode auxiliary anode land bed.
Examples: the pipeline adopts a 3PE anticorrosive layer, and the pipeline adopts a flexible anode cathode protection system to provide cathode protection for the pipeline, and the rated output of the potentiostat is 50V/40A, so that the flexible anode cathode protection system fails. The method for troubleshooting and recovering the failure problem of the flexible anode-cathode protection system comprises the following steps:
(1) The output voltage of the test potentiostat fluctuates between 2 and 50V, the output current fluctuates between 0 and 23.43A (see the description of figure 3), and the protection potential fluctuates between-4.23 and 0.008V (see the description of figure 4);
(2) Testing the grounding resistance of the flexible anode to be 1.7 omega;
(3) Testing the on-off electric potential of the pipeline, wherein the electric potential of the pipeline fluctuates severely in the subway operation time period, and the electric potential of the pipeline does not fluctuate in the subway shutdown time period;
(4) The surrounding environment of the pipeline was investigated, and three subway lines were located at positions of distance of pipeline 618 m,710m and 1520m, respectively.
(5) Judging that the failure of the flexible anode cathode protection system of the pipeline is caused by subway stray current interference;
(6) Digging 2m deep at the position of the pipeline outlet power-on point, and installing an anti-interference probe at the position 0.3m away from the pipeline, wherein the wiring of the anti-interference probe is shown in figure 5 of the specification;
(7) The fluctuation of the protection potential of the test pipeline is reduced to minus 0.917 to minus 1.118V (see figure 6 of the specification), the fluctuation of the output current of the potentiostat is reduced to 0 to 14.45V (see figure 7 of the specification), and the flexible anode-cathode protection system is restored to normal operation.
The method determines the failure reason of the flexible anode cathode protection system and resumes the operation of the flexible anode cathode protection system.
Fig. 8 is a schematic structural diagram of a failure cause inspection and recovery device for a flexible anode-cathode protection system according to an embodiment of the present application, where the failure cause inspection and recovery device for a flexible anode-cathode protection system applies the above method, and the following description simply only refers to the structure of the failure cause inspection and recovery device for a flexible anode-cathode protection system, and other less-than-the-right matters, please refer to the related description in the failure cause inspection and recovery method for a flexible anode-cathode protection system, and referring to fig. 8, the failure cause inspection and recovery device for a flexible anode-cathode protection system according to an embodiment of the present application includes:
the acquisition module is used for acquiring test information of the flexible anode cathode protection system, wherein the test information comprises: the output current, the output voltage and the protection potential of the potentiostat, the grounding resistance of the flexible anode, the potential of the pipeline in the closed state of the potentiostat, the on/off potential along the pipeline, the peripheral interference source of the pipeline and the failure cause of the flexible anode cathode protection system;
the judging module is used for judging failure reasons and determining recovery modes according to the test information, wherein:
if the output current is smaller than the first preset value, the output voltage reaches the rated value of the potentiostat, the grounding resistance of the flexible anode is larger than the second preset value, and the failure cause is judged: breaking the flexible anode; the recovery mode is determined as follows: determining the breakpoint position by adopting a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method, and continuously connecting a flexible anode;
if the flexible anode grounding resistance is smaller than a third preset value, the fluctuation of the output voltage, the output current and the protection potential is severe, and the peripheral interference source of the pipeline is a subway system, the fluctuation of the on/off potential along the pipeline is severe, and the fluctuation of the output current and the protection potential is smaller in the subway shutdown time period at night, so that the failure is judged as follows: the interference of subway stray current; the recovery mode is determined as follows: adding an anti-interference probe at the electrified point;
if the flexible anode grounding resistance is smaller than the fourth preset value, the output voltage is smaller than the fifth preset value, the output current is smaller than the sixth preset value, the pipeline protection potential is negative, the potentiostat is closed, the pipeline potential is still negative, and the failure reason is judged as follows: a sacrificial anode is arranged at the position of the electrifying point; the recovery mode is determined as follows: determining the position of a sacrificial anode, excavating the sacrificial anode and removing the sacrificial anode;
if the grounding resistance of the flexible anode is smaller than a seventh preset value, the output voltage and the output current are normal to the protection potential of the pipeline, the on-off potential of the pipeline at the position far away from the on-off point along the pipeline is correct, and the failure cause is judged as follows: the current of the flexible anode decays fast; the recovery mode is determined as follows: the protection current feed point is increased.
As an optional implementation manner of the embodiment of the application, the judging module adopts a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method to determine the breakpoint position in the following manner: basic data of a pipeline is obtained, the position of an insulating joint of the pipeline is determined, and the excavation laying position of the flexible anode is judged; obtaining a flexible anode grounding resistance test value, and calculating the length of the flexible anode which is connected with the cable after fracture by combining the flexible anode basic parameters, the soil resistivity of the flexible anode laying position; feeding an alternating current signal into the flexible anode, positioning the position of the flexible anode, searching an alternating current attenuation mutation point of the flexible anode, and primarily judging the alternating current attenuation mutation point as a flexible anode fracture position; testing the alternating current ground potential gradient value of the flexible anode along the line, and preliminarily judging the breaking position of the flexible anode when the alternating current ground potential gradient value appears nearest to the insulating joint; and determining the fracture position of the flexible anode according to the primarily judged fracture position of the flexible anode.
As an optional implementation manner of the embodiment of the application, the judgment module adds the anti-interference probe at the power-on point by the following modes: acquiring basic data of a flexible anode cathode protection system and a pipeline, and determining the position of an electrified point; excavating a power-on point position, installing an anti-interference probe, and presetting a distance between the anti-interference probe and the outer wall of a pipeline at the power-on point position, wherein the anti-interference probe comprises: the device comprises a reticular polarization probe and a long-acting reference electrode, wherein the long-acting reference electrode is arranged in the reticular probe, and a medium with preset resistivity is added between the long-acting reference electrode and the reticular probe; the test piece cable of the anti-interference probe is connected to the zero position negative binding post of the potentiostat, the long-acting reference electrode is connected to the reference electrode binding post of the potentiostat, and the long-acting reference electrode of the original flexible anode-cathode protection system is canceled.
As an optional implementation manner of the embodiment of the present application, the judging module increases the protection current feed point by: obtaining basic parameters of flexible anode and cathode protection, and testing the resistivity of soil in the flexible anode laying environment; calculating the current attenuation length of the flexible anode; testing the on-off electric potential of the pipeline along the line; selecting a position where the potential of the pipeline cannot reach the standard, carrying out a feed test, and determining the current demand and the protection range; and determining the distance between the feed points of the protection current according to the current attenuation length of the flexible anode, the on-off electric potential of the pipeline along the line, the current demand and the protection range.
Therefore, the failure cause of the flexible anode can be accurately judged through the failure cause checking and recovering device of the flexible anode cathode protection system, and the failure recovering method is provided in a targeted manner, after the flexible anode is broken, the broken position can be accurately positioned, and the waste of manpower and weakness caused by blind excavation is reduced; the problem that the flexible anode cathode protection system cannot normally operate due to subway interference can be effectively recovered, the difficulty of operation management is reduced, and the cost for increasing subway interference protection measures is reduced; the problem of flexible positive pole current decay is big has effectually been solved, has improved flexible positive pole's utilization ratio, has improved the protection efficiency of pipeline, reduces the corruption risk of pipeline.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.
Claims (8)
1. The method for checking and recovering the failure cause of the flexible anode cathode protection system is characterized by comprising the following steps:
obtaining test information of a flexible anode cathode protection system, wherein the test information comprises: the output current, the output voltage and the protection potential of the potentiostat, the grounding resistance of the flexible anode, the potential of the pipeline in the closed state of the potentiostat, the on/off potential along the pipeline, the peripheral interference source of the pipeline and the failure cause of the flexible anode cathode protection system;
judging failure reasons and determining recovery modes according to the test information, wherein the method comprises the following steps:
if the output current is smaller than a first preset value, the output voltage reaches a rated value of the potentiostat, the grounding resistance of the flexible anode is larger than a second preset value, and the failure cause is judged: breaking the flexible anode; the recovery mode is determined as follows: determining the breakpoint position by adopting a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method, and continuously connecting a flexible anode;
if the flexible anode grounding resistance is smaller than a third preset value, the output voltage, the output current and the protection potential fluctuate violently, and the peripheral interference sources of the pipeline are subway systems, the on/off potential fluctuation of the pipeline along the line is violent, and in the subway outage time period at night, the output current and the protection potential fluctuation are smaller, and the failure cause is judged as follows: the interference of subway stray current; the recovery mode is determined as follows: adding an anti-interference probe at the electrified point;
if the flexible anode grounding resistance is smaller than a fourth preset value, the output voltage is smaller than a fifth preset value, the output current is smaller than a sixth preset value, the pipeline protection potential is negative, the potentiostat is closed, the pipeline potential is still negative, and the failure reason is judged as follows: a sacrificial anode is arranged at the position of the electrifying point; the recovery mode is determined as follows: determining the position of a sacrificial anode, excavating the sacrificial anode and removing the sacrificial anode;
if the flexible anode grounding resistance is smaller than a seventh preset value, the output voltage, the output current and the pipeline protection potential are normal, the on-off potential of the pipeline at a position far away from the electrifying point along the pipeline is correct, and the failure cause is judged: the flexible anode current decays fast; the recovery mode is determined as follows: the protection current feed point is increased.
2. The method of claim 1, wherein determining the breakpoint location using a ground resistance calculation method, an ac current decay method, and an ac ground potential gradient method comprises:
basic data of a pipeline is obtained, the position of an insulating joint of the pipeline is determined, and the excavation laying position of the flexible anode is judged;
acquiring the flexible anode grounding resistance test value, and calculating the length of the flexible anode which is connected with the cable after fracture by combining the flexible anode basic parameters, the soil resistivity of the flexible anode laying position;
feeding an alternating current signal into the flexible anode, positioning the position of the flexible anode, searching an alternating current attenuation mutation point of the flexible anode, and primarily judging the alternating current attenuation mutation point as a flexible anode fracture position;
testing the alternating current ground potential gradient value of the flexible anode along the line, and preliminarily judging the breaking position of the flexible anode when the alternating current ground potential gradient value appears nearest to the insulating joint;
and determining the fracture position of the flexible anode according to the primarily judged fracture position of the flexible anode.
3. The method of claim 1, wherein adding an anti-interference probe at the energized point location comprises:
acquiring basic data of a flexible anode cathode protection system and a pipeline, and determining the position of an electrified point;
excavating a power-on point position, installing an anti-interference probe, wherein the anti-interference probe is away from the outer wall of a pipeline at the power-on point position by a preset distance, and the anti-interference probe comprises: the device comprises a reticular polarization probe and a long-acting reference electrode, wherein the long-acting reference electrode is arranged in the reticular probe, and a medium with preset resistivity is added between the long-acting reference electrode and the reticular probe; the test piece cable of the anti-interference probe is connected to the zero position negative binding post of the constant potential instrument, the long-acting reference electrode is connected to the reference electrode binding post of the constant potential instrument, and the long-acting reference electrode of the original flexible anode cathode protection system is canceled.
4. The method of claim 1, wherein increasing the protection current feed point comprises:
obtaining basic parameters of flexible anode and cathode protection, and testing the resistivity of soil in the flexible anode laying environment;
calculating the current attenuation length of the flexible anode;
testing the on-off electric potential of the pipeline along the line;
selecting a position where the potential of the pipeline cannot reach the standard, carrying out a feed test, and determining the current demand and the protection range;
and determining the distance between the feed points of the protection current according to the current attenuation length of the flexible anode, the on-off electric potential of the pipeline along the line, the current demand and the protection range.
5. The utility model provides a flexible positive pole cathodic protection system failure cause investigation and recovery device which characterized in that includes:
the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring test information of the flexible anode cathode protection system, and the test information comprises: the output current, the output voltage and the protection potential of the potentiostat, the grounding resistance of the flexible anode, the potential of the pipeline in the closed state of the potentiostat, the on/off potential along the pipeline, the peripheral interference source of the pipeline and the failure cause of the flexible anode cathode protection system;
the judging module is used for judging failure reasons and determining recovery modes according to the test information, wherein:
if the output current is smaller than a first preset value, the output voltage reaches a rated value of the potentiostat, the grounding resistance of the flexible anode is larger than a second preset value, and the failure cause is judged: breaking the flexible anode; the recovery mode is determined as follows: determining the breakpoint position by adopting a grounding resistance calculation method, an alternating current attenuation method and an alternating current ground potential gradient method, and continuously connecting a flexible anode;
if the flexible anode grounding resistance is smaller than a third preset value, the output voltage, the output current and the protection potential fluctuate violently, and the peripheral interference sources of the pipeline are subway systems, the on/off potential fluctuation of the pipeline along the line is violent, and in the subway outage time period at night, the output current and the protection potential fluctuation are smaller, and the failure cause is judged as follows: the interference of subway stray current; the recovery mode is determined as follows: adding an anti-interference probe at the electrified point;
if the flexible anode grounding resistance is smaller than a fourth preset value, the output voltage is smaller than a fifth preset value, the output current is smaller than a sixth preset value, the pipeline protection potential is negative, the potentiostat is closed, the pipeline potential is still negative, and the failure reason is judged as follows: a sacrificial anode is arranged at the position of the electrifying point; the recovery mode is determined as follows: determining the position of a sacrificial anode, excavating the sacrificial anode and removing the sacrificial anode;
if the flexible anode grounding resistance is smaller than a seventh preset value, the output voltage, the output current and the pipeline protection potential are normal, the on-off potential of the pipeline at a position far away from the electrifying point along the pipeline is correct, and the failure cause is judged: the flexible anode current decays fast; the recovery mode is determined as follows: the protection current feed point is increased.
6. The apparatus of claim 5, wherein the determination module determines the breakpoint position by using a ground resistance calculation method, an ac current decay method, and an ac ground potential gradient method by:
basic data of a pipeline is obtained, the position of an insulating joint of the pipeline is determined, and the excavation laying position of the flexible anode is judged;
acquiring the flexible anode grounding resistance test value, and calculating the length of the flexible anode which is connected with the cable after fracture by combining the flexible anode basic parameters, the soil resistivity of the flexible anode laying position;
feeding an alternating current signal into the flexible anode, positioning the position of the flexible anode, searching an alternating current attenuation mutation point of the flexible anode, and primarily judging the alternating current attenuation mutation point as a flexible anode fracture position;
testing the alternating current ground potential gradient value of the flexible anode along the line, and preliminarily judging the breaking position of the flexible anode when the alternating current ground potential gradient value appears nearest to the insulating joint;
and determining the fracture position of the flexible anode according to the primarily judged fracture position of the flexible anode.
7. The apparatus of claim 5, wherein the determination module adds an anti-interference probe at the energized point location by:
acquiring basic data of a flexible anode cathode protection system and a pipeline, and determining the position of an electrified point;
excavating a power-on point position, installing an anti-interference probe, wherein the anti-interference probe is away from the outer wall of a pipeline at the power-on point position by a preset distance, and the anti-interference probe comprises: the device comprises a reticular polarization probe and a long-acting reference electrode, wherein the long-acting reference electrode is arranged in the reticular probe, and a medium with preset resistivity is added between the long-acting reference electrode and the reticular probe; the test piece cable of the anti-interference probe is connected to the zero position negative binding post of the constant potential instrument, the long-acting reference electrode is connected to the reference electrode binding post of the constant potential instrument, and the long-acting reference electrode of the original flexible anode cathode protection system is canceled.
8. The apparatus of claim 5, wherein the determination module increases the protection current feed point by:
obtaining basic parameters of flexible anode and cathode protection, and testing the resistivity of soil in the flexible anode laying environment;
calculating the current attenuation length of the flexible anode;
testing the on-off electric potential of the pipeline along the line;
selecting a position where the potential of the pipeline cannot reach the standard, carrying out a feed test, and determining the current demand and the protection range;
and determining the distance between the feed points of the protection current according to the current attenuation length of the flexible anode, the on-off electric potential of the pipeline along the line, the current demand and the protection range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310311386.7A CN116356331B (en) | 2023-03-28 | 2023-03-28 | Method and device for troubleshooting and recovering failure reasons of flexible anode and cathode protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310311386.7A CN116356331B (en) | 2023-03-28 | 2023-03-28 | Method and device for troubleshooting and recovering failure reasons of flexible anode and cathode protection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116356331A CN116356331A (en) | 2023-06-30 |
| CN116356331B true CN116356331B (en) | 2023-09-26 |
Family
ID=86936072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310311386.7A Active CN116356331B (en) | 2023-03-28 | 2023-03-28 | Method and device for troubleshooting and recovering failure reasons of flexible anode and cathode protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116356331B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1529794A (en) * | 1975-12-02 | 1978-10-25 | Morgan J | Reference electrode system for use in cathodic protection |
| FR2726083A1 (en) * | 1994-10-24 | 1996-04-26 | Gaz De France | Checking method for buried metallic pipeline system having cathodic protection |
| GB0607031D0 (en) * | 2005-10-04 | 2006-05-17 | Glass Gareth K | Monitoring method |
| CN104060279A (en) * | 2014-05-20 | 2014-09-24 | 北京市燃气集团有限责任公司 | Effectiveness criterion and residual life prediction method of sacrificial anode and cathode protection system |
| CN105698849A (en) * | 2016-01-20 | 2016-06-22 | 北京化工大学 | Zinc-base sacrificial anode failure analysis method |
| CN108411308A (en) * | 2018-03-30 | 2018-08-17 | 东北电力大学 | Novel buried pipeline cathod protector and method |
| CN113621969A (en) * | 2020-05-07 | 2021-11-09 | 中国石油天然气股份有限公司 | Analysis method for failure reasons of oil-gas field pipeline cathode protection system |
| CN114487574A (en) * | 2020-10-27 | 2022-05-13 | 沃尔沃遍达公司 | Potential measuring apparatus and method |
| CN114717564A (en) * | 2021-01-05 | 2022-07-08 | 中国石油天然气股份有限公司 | Method and device for determining cathodic protection potential of pipeline |
| CN115248352A (en) * | 2022-06-08 | 2022-10-28 | 北京市燃气集团有限责任公司 | Method and device for evaluating effectiveness of buried pipeline sacrificial anode cathodic protection system |
-
2023
- 2023-03-28 CN CN202310311386.7A patent/CN116356331B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1529794A (en) * | 1975-12-02 | 1978-10-25 | Morgan J | Reference electrode system for use in cathodic protection |
| FR2726083A1 (en) * | 1994-10-24 | 1996-04-26 | Gaz De France | Checking method for buried metallic pipeline system having cathodic protection |
| GB0607031D0 (en) * | 2005-10-04 | 2006-05-17 | Glass Gareth K | Monitoring method |
| CN104060279A (en) * | 2014-05-20 | 2014-09-24 | 北京市燃气集团有限责任公司 | Effectiveness criterion and residual life prediction method of sacrificial anode and cathode protection system |
| CN105698849A (en) * | 2016-01-20 | 2016-06-22 | 北京化工大学 | Zinc-base sacrificial anode failure analysis method |
| CN108411308A (en) * | 2018-03-30 | 2018-08-17 | 东北电力大学 | Novel buried pipeline cathod protector and method |
| CN113621969A (en) * | 2020-05-07 | 2021-11-09 | 中国石油天然气股份有限公司 | Analysis method for failure reasons of oil-gas field pipeline cathode protection system |
| CN114487574A (en) * | 2020-10-27 | 2022-05-13 | 沃尔沃遍达公司 | Potential measuring apparatus and method |
| CN114717564A (en) * | 2021-01-05 | 2022-07-08 | 中国石油天然气股份有限公司 | Method and device for determining cathodic protection potential of pipeline |
| CN115248352A (en) * | 2022-06-08 | 2022-10-28 | 北京市燃气集团有限责任公司 | Method and device for evaluating effectiveness of buried pipeline sacrificial anode cathodic protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116356331A (en) | 2023-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gummow et al. | GIC effects on pipeline corrosion and corrosion control systems | |
| CN105695997A (en) | Safety protection method for underground metal pipeline | |
| JP5060052B2 (en) | Anticorrosion management method, anticorrosion management device, anticorrosion management program, information recording medium of buried metal body cathodically protected | |
| CN104947118B (en) | Flexible anode breakpoint detection method | |
| CN110609221A (en) | Automatic monitoring device for pipeline insulating joint and application method thereof | |
| JP4095937B2 (en) | Method and apparatus for protecting buried structure | |
| CN116356331B (en) | Method and device for troubleshooting and recovering failure reasons of flexible anode and cathode protection system | |
| CN115248352A (en) | Method and device for evaluating effectiveness of buried pipeline sacrificial anode cathodic protection system | |
| KR101604344B1 (en) | Protection potential measurement system of underground pipeline of high-speed mobile Based on low-power | |
| CN115747811B (en) | Community gas pipe network corrosion hot spot targeting protection field test method, implementation method and system | |
| CN112856252A (en) | Drainage pipeline water leakage detection method | |
| KR100806961B1 (en) | Integrated measurement device capable of measuring corrosion against protection direct voltage, alternating voltage and ground resistance | |
| JP4698318B2 (en) | Anticorrosion state monitoring method and system | |
| JP2005091191A (en) | Method of detecting defective part in coating of embedded metal pipe | |
| CN107727970B (en) | Detection method and system for alternating current drainage device of buried steel pipeline | |
| US7190154B2 (en) | Method and system for measuring a condition of a structure | |
| CN116413197B (en) | Flexible anode breakpoint position testing and determining method and device | |
| Segall et al. | Ensuring the accuracy of indirect inspections data in the ECDA process | |
| Leeds et al. | Cathodic protection | |
| CN207541167U (en) | A kind of detecting system of buried steel pipe exchange drain means | |
| Kowalski | The close interval potential survey (CIS/CIPS) method for detecting corrosion in underground pipelines | |
| CN217980719U (en) | Nonmetal composite pipe leak source on-line monitoring and detection positioning integrated equipment | |
| CN219772263U (en) | Cathode protection system for buried metal structures | |
| CN219752438U (en) | Community gas pipe network corrosion hot spot targeting protection field test and implementation system | |
| CN111220536A (en) | Method, device and system for detecting corrosion probability of pipeline |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |