Method and device for checking blind spots of buried steel pipeline corrosion control unit division and verification

Abstract

The present invention provides a method and device for dividing and verifying blind spots in buried steel pipeline corrosion control units. By utilizing the division of the corrosion control units, the electrical continuity of the pipeline is clarified, a precise range is provided for on-site testing, the pipeline interference risk is more accurately evaluated, and effective protective measures are taken. This can effectively avoid the waste of manpower and material resources caused by blind detection and construction, and ensure the safe operation of the pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of corrosion protection of buried steel pipelines, and in particular to a method and device for dividing, verifying and blind spot checking of a corrosion control unit of a buried urban gas steel pipeline. Background Art

[0002] In recent years, my country's electrified railways, high-voltage transmission lines, urban rail transit, and other infrastructure have developed rapidly. The electromagnetic environment surrounding pipelines has become increasingly complex, and the risk of corrosion from stray current interference has become increasingly prominent. Urban gas pipelines, in particular, are often located in densely populated areas. Due to the influence of urban rail transit and various power facilities, the external corrosion environment is relatively complex. Furthermore, urban gas pipelines have complex routes and numerous insulated joints. This makes it difficult to clearly determine the electrical continuity of the pipelines during operation, making it difficult to evaluate the effectiveness of cathodic protection and troubleshoot cathodic protection failures. It is also difficult to accurately determine the interference range during stray current evaluation, making field testing difficult, interference evaluation inaccurate, and protective measures ineffective. This results in a significant waste of manpower and resources, while seriously impacting pipeline operational safety. Summary of the Invention

[0003] The present invention aims to provide a method and device for dividing, verifying and checking blind areas of a buried steel pipeline corrosion control unit, which overcomes the above-mentioned problems or at least partially solves the above-mentioned problems.

[0004] To achieve the above object, the technical solution of the present invention is specifically implemented as follows:

[0005] One aspect of the present invention provides a method for dividing and verifying blind spots of corrosion control units of buried steel pipelines, comprising: obtaining basic information of the buried steel pipeline, determining the location of the pipeline insulation joint based on the basic information of the buried steel pipeline, wherein the basic information of the buried steel pipeline includes: the external anti-corrosion coating of the buried steel pipeline, the cathodic protection method, the station or valve chamber location and the potential test point; dividing the corrosion control units of the buried steel pipeline according to the location of the pipeline insulation joint and the route of the buried steel pipeline; obtaining the nearest pipeline potential test points on both sides of each insulation joint between the corrosion control units; determining one or more preset methods based on the potential test points to test and evaluate the effectiveness of the insulation joint to obtain test results; verifying each corrosion control unit based on the test results, re-splitting and merging the corrosion control units, and numbering each corrosion control unit; conducting on-site verification of the basic information of each corrosion control unit, screening out corrosion control units without test piles or other test points, and determining them as blind spots of the pipeline, wherein the basic information of the corrosion control unit includes: cathodic protection method, cathodic protection station location, test pile location, test well and sacrificial anode location; and drawing a pipeline corrosion control unit management schematic diagram.

[0006] Among them, determining one or more preset methods based on the potential test points to test and evaluate the effectiveness of the insulating joint includes: using the potential method to test the location where the insulating joint test pile is set, using a data recorder to synchronously record the power potential and AC voltage of the pipelines on both sides of the insulating joint, and judging the effectiveness of the insulating joint by comparing the test data; using the potential monitoring method to test the pipe section within 1 km on both sides of the insulating joint where potential test points are set, using a data recorder to synchronously record the power potential and AC voltage of the pipelines on both sides, and judging the effectiveness of the insulating joint by comparing the test data; and / or using the AC current attenuation method to test the corrosion control unit where potential test points are set on both sides of the pipeline or within 2 km on one side, feeding a high-frequency signal on the pipeline, and judging the effectiveness of the insulating joint by the current test data in the pipes on both sides of the insulating joint.

[0007] Among them, drawing a pipeline corrosion control unit management diagram includes: drawing a pipeline route diagram; summarizing the station location, insulation joint location, cathodic protection station location, and test point location on the pipeline route diagram; marking the corrosion control unit number and pipeline basic information on the pipeline; and marking the blind spot corrosion control unit on the pipeline.

[0008] Wherein, dividing the corrosion control units of the buried steel pipeline includes: dividing the electrically connected pipelines into the same corrosion control unit.

[0009] On the other hand, the present invention provides a device for verifying and checking blind spots of buried steel pipeline corrosion control units, including: a determination module for obtaining basic information of buried steel pipelines and determining the position of pipeline insulation joints according to the basic information of buried steel pipelines, wherein the basic information of buried steel pipelines includes: the outer anti-corrosion coating of buried steel pipelines, cathodic protection mode, station or valve room position and potential test points; a division module for dividing the corrosion control units of buried steel pipelines according to the positions of pipeline insulation joints and buried steel pipeline routes; an acquisition module for obtaining the nearest pipeline potential test points on both sides of each insulation joint between corrosion control units; a testing module for determining the position of pipeline insulation joints according to the positions of pipeline insulation joints and buried steel pipeline routes; a determination ... The potential test point determines one or more preset methods to test and evaluate the effectiveness of the insulating joint to obtain the test results; the verification module is used to verify each corrosion control unit according to the test results, re-split and merge the corrosion control units, and number each corrosion control unit; the screening module is used to verify the basic information of each corrosion control unit on site, screen out the corrosion control units without test piles or other test points, and determine them as blind spots of the pipeline, where the basic information of the corrosion control unit includes: cathodic protection method, cathodic protection station location, test pile location, test well and sacrificial anode location; the drawing module is used to draw a schematic diagram of the pipeline corrosion control unit management.

[0010] Among them, the test module determines one or more preset methods according to the potential test points to test and evaluate the effectiveness of the insulation joint in the following manner: the potential method is used to test the location where the insulation joint test pile is set, and the power potential and AC voltage of the pipeline on both sides of the insulation joint are synchronously recorded by a data recorder, and the effectiveness of the insulation joint is judged by comparing the test data; the potential monitoring method is used to test the pipe section with potential test points set within 1 km on both sides of the insulation joint, and the power potential and AC voltage of the pipeline on both sides are synchronously recorded by a data recorder, and the effectiveness of the insulation joint is judged by comparing the test data; and / or the AC current attenuation method is used to test the corrosion control unit with potential test points set within 2 km on both sides of the pipeline, feed a high-frequency signal on the pipeline, and judge the effectiveness of the insulation joint by the current test data in the pipes on both sides of the insulation joint.

[0011] Among them, the drawing module draws the pipeline corrosion control unit management diagram in the following ways: drawing a pipeline route diagram; summarizing the station location, insulation joint location, cathodic protection station location, and test point location on the pipeline route diagram; marking the corrosion control unit number and pipeline basic information on the pipeline; marking the blind spot corrosion control unit on the pipeline.

[0012] The division module divides the corrosion control units of the buried steel pipeline in the following manner: the electrically connected pipelines are divided into the same corrosion control unit.

[0013] It can be seen that the blind spot inspection method and device for the buried steel pipeline corrosion control unit provided by the present invention can clarify the electrical continuity of the pipeline by utilizing the division of the corrosion control unit, provide a precise range for on-site testing, more accurately evaluate the pipeline interference risk, and take effective protective measures, which can effectively avoid the waste of manpower and material resources caused by blind detection and construction, and ensure the safe operation of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 A flowchart of a method for dividing, verifying, and troubleshooting blind areas of a buried steel pipeline corrosion control unit provided by an embodiment of the present invention;

[0016] Figure 2 Provide a potential method test wiring diagram for an embodiment of the present invention;

[0017] Figure 3A wiring diagram of the potential monitoring method provided by an embodiment of the present invention;

[0018] Figure 4 A PCM test wiring diagram provided in an embodiment of the present invention;

[0019] Figure 5 A diagram showing the division of the corrosion control unit provided in an embodiment of the present invention;

[0020] Figure 6 A structural diagram of a device for dividing and verifying blind areas of a buried steel pipeline corrosion control unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0022] Figure 1 A flowchart showing a method for checking blind spots of a buried steel pipeline corrosion control unit according to an embodiment of the present invention is shown. Figure 1 The embodiment of the present invention provides a method for checking blind areas of a buried steel pipeline corrosion control unit by dividing and verifying the blind areas, including:

[0023] S1, obtain the basic information of the buried steel pipeline, and determine the location of the pipeline insulation joint according to the basic information of the buried steel pipeline, wherein the basic information of the buried steel pipeline includes: the external anti-corrosion coating of the buried steel pipeline, the cathodic protection method, the station or valve room location and the potential test point.

[0024] Specifically, the present invention determines the location of the pipeline insulation joint based on pipeline design, completion and measurement basic data.

[0025] During specific implementation, the present invention queries basic information based on the design data, completion data, and measurement data of the buried steel pipeline, and based on this basic information, collects statistics on the locations of the insulation joints designed for the target pipe section or the locations where insulation joints may be designed; the basic information includes the external anti-corrosion coating of the buried steel pipeline, the cathodic protection method, the station (valve chamber) location, and the potential test points; the locations where insulation joints may be designed are generally the inlet and outlet valve chamber locations, the inlet and outlet station locations, and the locations before and after the directional drilling crossing section. The potential test points include insulation joint test piles, ordinary potential test piles, intelligent test piles, drainage piles, gate wells, and all other locations that can be electrically connected to the pipeline through wires.

[0026] S2, divide the corrosion control units of the buried steel pipeline according to the location of the pipeline insulation joints and the routing of the buried steel pipeline.

[0027] Specifically, the corrosion control units of the buried steel pipeline are divided according to the query results of the above basic information and the direction of the pipeline.

[0028] As an optional implementation of an embodiment of the present invention, dividing the buried steel pipeline corrosion control units includes dividing the electrically connected pipelines into the same corrosion control unit. Specifically, the present invention divides the electrically connected pipelines into the same corrosion control unit based on the buried steel pipeline routing and the locations of the insulation joints.

[0029] S3, obtain the nearest pipeline potential test points on both sides of each insulating joint between the corrosion control units.

[0030] Specifically, an on-site survey is conducted based on the query results of the above basic information to confirm the nearest pipeline potential test points on both sides of each insulating joint between the corrosion control units.

[0031] S4, determining one or more preset methods according to the potential test points to test and evaluate the effectiveness of the insulating joint to obtain a test result.

[0032] Specifically, a variety of suitable methods are selected according to the potential test points to test and evaluate the effectiveness of the insulating joint.

[0033] The present invention verifies basic information of the internal pipeline of the corrosion control unit, including pipeline length, pipeline cathodic protection mode, test point location and number, and pipeline historical test data; tests the performance of the insulating joints between the corrosion control units, evaluates the effectiveness of the insulating joints, and verifies the electrical continuity of different corrosion control units.

[0034] As an optional implementation manner of an embodiment of the present invention, determining one or more preset methods based on potential test points to test and evaluate the effectiveness of the insulating joint includes: using the potential method to test the location where the insulating joint test pile is set, using a data recorder to synchronously record the power potential and AC voltage of the pipelines on both sides of the insulating joint, and judging the effectiveness of the insulating joint by comparing the test data; using the potential monitoring method to test the pipe section within 1 km on both sides of the insulating joint where potential test points are set, using a data recorder to synchronously record the power potential and AC voltage of the pipelines on both sides, and judging the effectiveness of the insulating joint by comparing the test data; and / or using the AC current attenuation method to test the corrosion control unit where potential test points are set on both sides of the pipeline within 2 km on one side, feeding a high-frequency signal into the pipeline, and judging the effectiveness of the insulating joint by the current test data in the pipes on both sides of the insulating joint.

[0035] Specifically, the applicable method for the effectiveness test of the insulating joint is implemented as follows:

[0036] (1) The location where the insulation joint test pile is set is tested using the potential method. The pipeline power potential and AC voltage on both sides of the insulation joint are synchronously recorded using a data recorder. The effectiveness of the insulation joint is determined by comparing the test data.

[0037] (2) For the pipe sections with potential test points within 1 km on both sides of the insulation joint, the potential monitoring method is used to test the pipelines. The potential and AC voltage on both sides of the pipeline are recorded synchronously by a data recorder. The effectiveness of the insulation joint is judged by comparing the test data.

[0038] (3) For the corrosion control unit with potential test points set within 2 km on both sides of the pipeline or on one side, the AC current attenuation method is used to test the pipeline. A high-frequency signal is fed into the pipeline, and the effectiveness of the insulation joint is judged by the current test data on both sides of the insulation joint;

[0039] (4) Evaluate the effectiveness of the insulating joint based on the test results of one or more methods (1)-(3).

[0040] S5, verify each corrosion control unit according to the test results, re-split and merge the corrosion control units, and number each corrosion control unit.

[0041] Specifically, the present invention verifies the division result of the buried pipeline corrosion control units according to the performance of the insulating joints and the electrical continuity of the corrosion control units, and numbers the corrosion control units.

[0042] During specific implementation, based on the above test results, the divided corrosion control units are verified, the corrosion control units are re-split and merged, and each corrosion control unit is reasonably numbered. The numbering principle must ensure the uniqueness, simplicity and easy identification of the unit.

[0043] S6. Verify the basic information of each corrosion control unit on site, screen out the corrosion control units without test piles or other test points, and identify them as blind spots of the pipeline. The basic information of the corrosion control unit includes: cathodic protection method, cathodic protection station location, test pile location, test well and sacrificial anode location.

[0044] Specifically, the present invention evaluates whether the buried pipeline of the corrosion control unit is a blind spot based on the distribution of the corrosion control units, the arrangement of the insulating joints, and whether the corrosion control unit has a test point.

[0045] During the specific implementation, the basic information of each corrosion control unit, such as the cathodic protection mode, cathodic protection station location, test pile location, test well, and sacrificial anode location, is verified on site, and corrosion control units without test piles or other test points are screened out and defined as blind spots of the pipeline.

[0046] S7, draw a schematic diagram of pipeline corrosion control unit management.

[0047] Specifically, a management diagram of the target pipeline corrosion control unit is drawn based on the test results of the above steps, which is used for cathodic protection and stray current interference testing and protection scheme design of the pipeline.

[0048] As an optional implementation of an embodiment of the present invention, drawing a pipeline corrosion control unit management schematic includes: drawing a pipeline routing schematic; summarizing the station location, insulation joint location, cathodic protection station location, and test point location on the pipeline routing schematic; marking the corrosion control unit number and pipeline basic information on the pipeline; and marking the blind spot corrosion control unit on the pipeline.

[0049] Specifically, the pipeline corrosion control unit management diagram is implemented as follows:

[0050] (1) Draw a schematic diagram of the pipeline routing;

[0051] (2) Summarize the station location, insulation joint location, cathodic protection station location, and test point location on the schematic diagram;

[0052] (3) Mark the corrosion control unit number and pipeline basic information on the pipeline;

[0053] (4) Mark the blind zone corrosion control unit on the pipeline.

[0054] It can be seen that the blind spot troubleshooting method for dividing and verifying the buried steel pipeline corrosion control unit provided by the embodiment of the present invention divides the complex urban gas underground pipeline network into different corrosion control units. Through the management of independent corrosion control units, the cathodic protection measures taken by different corrosion control units and the degree of interference by stray currents are different, so that the pipeline management unit can take different management measures according to different corrosion control units, effectively evaluate the effectiveness of cathodic protection of buried pipelines, accurately troubleshoot the problem of cathodic protection failure, accurately evaluate the stray current interference of the corrosion control unit pipeline, accurately take protective measures, and at the same time sort out the blind spot positions of the pipeline, improve the protection level of the pipeline, reduce the corrosion risk of buried steel pipelines, and avoid the waste of manpower and material resources caused by blind detection and construction.

[0055] The following combination Figures 2 to 5 The specific division method of the buried steel pipeline corrosion control unit of the present invention is described, which includes the following steps:

[0056] 1. Basic information was retrieved based on the design data, completion data, and measurement data of the buried steel pipeline. Based on this basic information, statistics were collected on the locations of the designed insulation joints or possible insulation joints in the target pipe sections. The data showed that insulation joints were present at the exit of plant station 1, before and after the directional drilling crossing section, and at the entry and exit locations and branch line locations of plant station 2. Pipe section 1 had 6 test piles, pipe section 2 had no test piles, pipe section 3 had 7 test piles, and pipe section 4 had 1 test pile. Plant stations 1 and 2 were each equipped with an impressed current cathodic protection system, which used flexible anodes as auxiliary anodes.

[0057] 2. Based on the query results of the basic data in step 1 and the pipeline trend map, divide the four pipe sections into four corrosion control units;

[0058] 3. Conduct an on-site survey based on the query results of the basic data in step 1 to confirm that the corrosion control unit of pipe section 1 has test pile 1 within 1 km of the exit position of plant station 1, and test pile 6 within 1 km before the directional drilling section. The corrosion control unit of pipeline 2 has test pile 7 within 1 km after the directional drilling section, and test piles 13 and 14 within 1 km of the entry and exit positions of plant station 2 respectively.

[0059] 4. At the test pile 1 position, the current decay method was used to test and confirm that the performance of the insulation joint at the outlet of plant station 1 was good; at the test pile 6 of pipeline 1 and the test pile 7 of pipe section 3, the potential monitoring method was used to simultaneously monitor the pipeline potential at the two test pile positions, and it was determined that pipe section 1 and pipe section 3 were electrically connected pipe sections. Through basic data investigation, it was determined that there were insulation joints before and after the directional drilling crossing section of the pipeline, and jumper wires were set before and after the directional drilling crossing to electrically connect pipe section 1 and pipe section 3; at the test pile 13 of pipeline 3 and the test pile 14 of pipe section 4, the potential monitoring method was used to simultaneously monitor the pipeline potential at the two test pile positions, and it was determined that pipe section 3 and pipe section 4 were electrically connected pipe sections. Through basic data investigation, insulation joints were set at the inlet and outlet of plant station 2, and jumper wires were set on the outside of the insulation joints to electrically connect pipe section 3 and pipe section 4; at the test piles 13 and 14 positions, the current decay method was used to test and confirm that the performance of the insulation joints at the inlet and outlet of plant station 2 was good.

[0060] 5. According to the test results of step 4, pipe section 1, pipe section 3 and pipe section 4 are divided into corrosion control unit 1, and pipe section 2 is divided into corrosion control unit 2.

[0061] VI. Based on the basic data query results and on-site verification in Step 1, Corrosion Control Unit 1 uses external cathodic protection, with cathodic protection stations located at Stations 1 and 2, using flexible anodes to assist with the anode bed. Corrosion Control Unit 1 has a total of 14 test piles, each with a temporary sacrificial anode. Corrosion Control Unit 2 is a blind area with no test points, making it impossible to test the pipeline's current condition.

[0062] 7. Draw a schematic diagram of the pipeline corrosion control unit management. Figure 5 .

[0063] Figure 6 The structure diagram of the blind spot inspection device for the buried steel pipeline corrosion control unit provided by the embodiment of the present invention is shown. The blind spot inspection device for the buried steel pipeline corrosion control unit is applied with the above method. The following is a brief description of the structure of the blind spot inspection device for the buried steel pipeline corrosion control unit. For other matters not covered, please refer to the relevant description of the blind spot inspection method for the buried steel pipeline corrosion control unit. Figure 6 The embodiment of the present invention provides a device for checking blind spots of a buried steel pipeline corrosion control unit, comprising:

[0064] A determination module is used to obtain basic information of the buried steel pipeline and determine the location of the pipeline insulation joint based on the basic information of the buried steel pipeline, wherein the basic information of the buried steel pipeline includes: the external anti-corrosion coating of the buried steel pipeline, the cathodic protection method, the station or valve room location and the potential test point;

[0065] A partitioning module is used to partition the corrosion control units of the buried steel pipeline according to the location of the pipeline insulation joint and the route of the buried steel pipeline;

[0066] An acquisition module, used for acquiring the nearest pipeline potential test points on both sides of each insulating joint between the corrosion control units;

[0067] A test module is used to determine one or more preset methods based on the potential test points to test and evaluate the effectiveness of the insulation joint and obtain test results;

[0068] A verification module is used to verify each corrosion control unit according to the test results, re-split and merge the corrosion control units, and number each corrosion control unit;

[0069] The screening module is used to verify the basic information of each corrosion control unit on site, screening out corrosion control units without test piles or other test points, and identifying them as blind spots of the pipeline. The basic information of the corrosion control unit includes: cathodic protection method, cathodic protection station location, test pile location, test well and sacrificial anode location;

[0070] Drawing module, used to draw pipeline corrosion control unit management schematic diagram.

[0071] As an optional implementation manner of an embodiment of the present invention, the test module determines one or more preset methods according to the potential test points to test and evaluate the effectiveness of the insulating joint in the following manner: the location where the insulating joint test pile is set is tested using the potential method, and the power-on potential and AC voltage of the pipelines on both sides of the insulating joint are synchronously recorded using a data recorder, and the effectiveness of the insulating joint is judged by comparing the test data; the pipe section with potential test points set within 1 km on both sides of the insulating joint is tested using the potential monitoring method, and the power-on potential and AC voltage of the pipelines on both sides are synchronously recorded using a data recorder, and the effectiveness of the insulating joint is judged by comparing the test data; and / or the corrosion control unit with potential test points set within 2 km on both sides of the pipeline is tested using the AC current attenuation method, a high-frequency signal is fed into the pipeline, and the effectiveness of the insulating joint is judged by the current test data in the pipes on both sides of the insulating joint.

[0072] As an optional implementation manner of an embodiment of the present invention, the drawing module draws a pipeline corrosion control unit management schematic diagram in the following manner: drawing a pipeline routing schematic diagram; summarizing the station location, insulation joint location, cathodic protection station location, and test point location on the pipeline routing schematic diagram; marking the corrosion control unit number and pipeline basic information on the pipeline; and marking the blind spot corrosion control unit on the pipeline.

[0073] As an optional implementation of the embodiment of the present invention, the division module divides the corrosion control units of the buried steel pipeline in the following manner: the electrically connected pipelines are divided into the same corrosion control unit.

[0074] It can be seen that the buried steel pipeline corrosion control unit division verification blind spot investigation device provided by the embodiment of the present invention divides the complex urban gas underground pipeline network into different corrosion control units. Through the management of independent corrosion control units, the cathodic protection measures taken by different corrosion control units and the degree of interference by stray currents are different, so that the pipeline management unit can take different management measures according to different corrosion control units, effectively evaluate the effectiveness of cathodic protection of buried pipelines, accurately investigate the problem of cathodic protection failure, accurately evaluate the stray current interference of the corrosion control unit pipeline, accurately take protective measures, and at the same time sort out the blind spot position of the pipeline, improve the protection level of the pipeline, reduce the corrosion risk of buried steel pipelines, and avoid the waste of manpower and material resources caused by blind detection and construction.

[0075] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for checking blind spots of buried steel pipeline corrosion control unit division verification, characterized in that: include: Obtaining basic information of the buried steel pipeline, and determining the location of the pipeline insulation joint based on the basic information of the buried steel pipeline, wherein the basic information of the buried steel pipeline includes: the external anti-corrosion coating of the buried steel pipeline, the cathodic protection method, the station or valve room location, and the potential test point; Dividing the buried steel pipeline into corrosion control units according to the pipeline insulation joint position and the buried steel pipeline route; Obtain the nearest pipeline potential test points on both sides of each insulating joint between the corrosion control units; Determine one or more preset methods according to the potential test points to test and evaluate the effectiveness of the insulating joint to obtain a test result; Verifying each of the corrosion control units according to the test results, re-splitting and merging the corrosion control units, and numbering each of the corrosion control units; Conduct on-site verification of the basic information of each corrosion control unit, screen out corrosion control units without test piles or other test points, and determine them as blind spots of the pipeline, wherein the basic information of the corrosion control unit includes: cathodic protection mode, cathodic protection station location, test pile location, test well and sacrificial anode location; Draw a schematic diagram of pipeline corrosion control unit management; in: Determining one or more preset methods based on the potential test points to test and evaluate the effectiveness of the insulating joint includes: The potential method is used to test the location where the insulation joint test pile is set. The data recorder is used to synchronously record the electrical potential and AC voltage of the pipelines on both sides of the insulation joint. The effectiveness of the insulation joint is determined by comparing the test data. For pipe sections with potential test points within 1 km on both sides of the insulation joint, use the potential monitoring method to test, use a data logger to synchronously record the electrical potential and AC voltage of the pipelines on both sides, and determine the effectiveness of the insulation joint by comparing the test data; and / or For the corrosion control unit with potential test points set on both sides of the pipeline or within 2km on one side, the AC current attenuation method is used for testing. A high-frequency signal is fed into the pipeline, and the effectiveness of the insulating joint is judged by the current test data in the pipes on both sides of the insulating joint.

2. The method according to claim 1, characterized in that Drawing a pipeline corrosion control unit management schematic diagram includes: Draw a schematic diagram of the pipeline routing; Summarize the station location, insulation joint location, cathodic protection station location, and test point location on the pipeline routing diagram; Mark the corrosion control unit number and pipeline basic information on the pipeline; Mark the blind corrosion control unit on the pipe.

3. The method according to claim 1, characterized in that The corrosion control unit for dividing the buried steel pipeline includes: Divide electrically continuous pipelines into the same corrosion control unit.

4. A device for checking blind spots of buried steel pipeline corrosion control unit, characterized in that: include: a determination module, configured to obtain basic information of the buried steel pipeline and determine the location of the pipeline insulation joint based on the basic information of the buried steel pipeline, wherein the basic information of the buried steel pipeline includes: the external anti-corrosion coating of the buried steel pipeline, the cathodic protection method, the station or valve chamber location, and the potential test point; A division module, configured to divide the corrosion control units of the buried steel pipeline according to the positions of the pipeline insulation joints and the routing of the buried steel pipeline; An acquisition module, configured to acquire the nearest pipeline potential test points on both sides of each insulating joint between the corrosion control units; A testing module, configured to determine one or more preset methods based on the potential test points to test and evaluate the effectiveness of the insulating joint and obtain a test result; A verification module, configured to verify each of the corrosion control units according to the test results, re-split and re-merge the corrosion control units, and number each of the corrosion control units; A screening module is used to verify the basic information of each corrosion control unit on site, screen out corrosion control units without test piles or other test points, and determine them as blind spots of the pipeline, wherein the basic information of the corrosion control unit includes: cathodic protection mode, cathodic protection station location, test pile location, test well and sacrificial anode location; Drawing module, used to draw pipeline corrosion control unit management schematic diagram; in: The testing module determines one or more preset methods based on the potential test points to test and evaluate the effectiveness of the insulating joint in the following manner: The potential method is used to test the location where the insulation joint test pile is set. The data recorder is used to synchronously record the electrical potential and AC voltage of the pipelines on both sides of the insulation joint. The effectiveness of the insulation joint is determined by comparing the test data. For pipe sections with potential test points within 1 km on both sides of the insulation joint, use the potential monitoring method to test, use a data logger to synchronously record the electrical potential and AC voltage of the pipelines on both sides, and determine the effectiveness of the insulation joint by comparing the test data; and / or For the corrosion control unit with potential test points set on both sides of the pipeline or within 2km on one side, the AC current attenuation method is used for testing. A high-frequency signal is fed into the pipeline, and the effectiveness of the insulating joint is judged by the current test data in the pipes on both sides of the insulating joint.

5. The device according to claim 4, characterized in that The drawing module draws the pipeline corrosion control unit management schematic diagram in the following manner: Draw a schematic diagram of the pipeline routing; Summarize the station location, insulation joint location, cathodic protection station location, and test point location on the pipeline routing diagram; Mark the corrosion control unit number and pipeline basic information on the pipeline; Mark the blind corrosion control unit on the pipe.

6. The device according to claim 4, characterized in that The division module divides the corrosion control units of the buried steel pipeline in the following manner: Divide electrically continuous pipelines into the same corrosion control unit.

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