In-service gas pipeline additional cathode protection device based on data detection

Abstract

The utility model discloses an in-service gas pipeline additional cathode protection device based on data detection, which comprises test piles arrayed beside a gas pipeline at intervals, and each test pile is provided with a cathode protection data acquisition and sensing system, the cathode protection data acquisition and sensing system continuously acquires potential change of each fuel gas pipeline section and transmits potential change data to the CPU control module, after the CPU control module processes the potential change data, if a certain section of fuel gas pipeline is abnormal, the positioning module transmits position information of the corresponding test pile to the CPU control module, and the CPU control module transmits the position information of the corresponding test pile to the cathode protection data acquisition and sensing system. And the CPU control module controls the intelligent constant-current instrument to regulate and control the potential value input by the intelligent constant-current instrument to the gas pipeline, so that the gas pipeline is protected in time.

Description

Technical Field

[0001] The utility model relates to the field of buried pipeline protection in ground engineering, and in particular to an additional cathode protection device for an in-service gas pipeline based on data detection. Background Art

[0002] At present, the most commonly used method for judging stray current is to manually collect the cathodic protection potential of the buried pipeline at the test pile. If the pipeline potential is abnormal, it indicates that there may be stray current interference on the pipeline. The secondary high-voltage pipeline of the bypass line (Wan'an Gas Distribution Station-Zhonghe New Station) is 11.51KM long, with a specification of D159, a design pressure of 1.6MPa, and an operating pressure of 0.8MPA. The pipeline is laid in parallel with Chengdu Metro Line 1 and Line 18. The pipeline uses seamless steel pipes with a material of No. 20. Three layers of PE are used for corrosion protection. The entire line is protected by sacrificial anode protection. However, after the sacrificial anode was installed in this section of the pipeline in July 2019, the cathodic protection potential of the pipeline has never reached the minimum protection unit specified in GB / T21448-2017 [Technical Specifications for Cathodic Protection of Buried Steel Pipelines]. It was found in daily testing that the cathodic protection potential fluctuated greatly, and the fluctuation pattern was closely related to the operation and suspension of the subway, which was suspected to be interfered by dynamic stray current. To this end, currently, manual measurement of power-off potential is often used for detection. However, this method is highly dependent on synchronous switches and manual power-off measurements, and there is also a problem of large measurement requirements for daily maintenance. Utility Model Content

[0003] The purpose of the utility model is to provide an additional cathodic protection device for an in-service gas pipeline based on data detection. By means of test piles arranged at intervals beside the gas pipeline, the gas pipeline is independently monitored in sections, and anomalies in local sections of the gas pipeline can be located in time, thereby improving the accuracy of gas pipeline monitoring and reducing the need for daily maintenance measurements. In addition, the cathodic protection data acquisition and sensing system can also improve the traceability and detection efficiency of monitoring data.

[0004] In order to achieve the above technical requirements, the utility model is implemented through the following technical solutions:

[0005] An additional cathodic protection device for an in-service gas pipeline based on data detection includes test piles arranged in an array at intervals beside the gas pipeline, each of which is provided with a cathodic protection data acquisition and sensing system;

[0006] The cathodic protection data acquisition and sensing system includes a positioning module, a cathodic protection data acquisition module and an intelligent constant current instrument. The anode terminal of the intelligent constant current instrument is connected to a buried deep well polarization probe, the cathode terminal of the intelligent constant current instrument is connected to a gas pipeline, and the electrode terminal of the intelligent constant current instrument is connected to a buried long-term reference electrode.

[0007] The cathodic protection data acquisition module is connected to the reference electrode and the gas pipeline respectively, and is used to continuously collect the potential change of the gas pipeline and transmit the potential change data to the CPU control module. The CPU control module is connected to the intelligent constant current instrument to adjust the potential value input to the gas pipeline by the intelligent constant current instrument;

[0008] The positioning module transmits the position information corresponding to the test pile to the CPU control module.

[0009] In this solution, the test piles are arranged in an array along the gas pipeline to evenly divide the gas pipeline into several sections, and each test pile is provided with a cathodic protection data acquisition and sensing system, which continuously collects the potential changes of the gas pipeline section to which it belongs and transmits the potential change data to the CPU control module. After the CPU control module processes the potential change data, if an abnormality occurs in a certain section of the gas pipeline, the positioning module transmits the position information of the corresponding test pile to the CPU control module, and promptly locates the abnormality of the local section of the gas pipeline. The CPU control module controls the intelligent constant current instrument to adjust the potential value input to the gas pipeline, so as to protect the gas pipeline in time.

[0010] A further technical solution of the cathodic protection device is that the cathodic protection data acquisition module collects and stores data on the potential of the gas pipeline at a frequency of 1s to 3s, further improving the accuracy of gas pipeline monitoring.

[0011] A further technical solution of the cathodic protection device is that the cathodic protection data acquisition module collects DC stray current and / or AC stray current on the gas pipeline, further improving the accuracy of gas pipeline monitoring.

[0012] A further technical solution of the cathodic protection device is that when the potential change of the gas pipeline is greater than 0.5mV / m or the potential offset between the gas pipeline and the surrounding soil exceeds ±20mV, the CPU control module adjusts the potential value input to the gas pipeline to further improve the accuracy of gas pipeline monitoring.

[0013] A further technical solution of the cathodic protection device is that when the CPU control module detects that the AC disturbance voltage is higher than 4V, the CPU control module transmits the position information of the corresponding test pile to the system platform module, thereby improving the accuracy of gas pipeline monitoring and reducing the need for daily maintenance measurements.

[0014] A further technical solution of the cathodic protection device is that the system platform module includes a data transmission module and a cloud server. The data transmission module collects data from the CPU control module and transmits the data information to the cloud server via a wired or wireless network. The data transmission module uses specific communication technology to transmit and remotely monitor the processed data, thereby improving the traceability and detection efficiency of the monitoring data.

[0015] A further technical solution of the cathodic protection device is that a front-end processing module is further arranged between the cathodic protection data acquisition module and the CPU control module, and the front-end processing module acquires and converts the front-end data and transmits it to the CPU control module.

[0016] A further technical solution of the cathodic protection device, the cathodic protection device also includes an auxiliary acquisition module, the auxiliary acquisition module includes various sensor probes for monitoring the outside of the gas pipeline, the auxiliary acquisition module collects some pipe body parameters in addition to the conventional parameters of the cathodic protection, and assists in evaluating the operating status of the cathodic protection, mainly including ultrasonic monitoring, optical fiber temperature monitoring, optical fiber Bragg grating strain monitoring, ER corrosion monitoring and soil pH monitoring near the pipeline.

[0017] A further technical solution of the cathodic protection device is that the cathodic protection device also includes a power supply module, which is arranged on the test pile, and the power supply module provides power for the cathodic protection data acquisition and sensing system, and the power supply module supplements electricity through efficient and clean energy.

[0018] A further technical solution of the cathodic protection device is that the outer shell of the test pile is made of hot-dip galvanized steel, and the outer surface of the test pile is sprayed with long-lasting anti-corrosion paint, so that the cathodic protection data acquisition and sensing system meets the requirements of long-term outdoor work.

[0019] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0020] The utility model comprises test piles, which are arrayed at intervals along the gas pipeline to evenly divide the gas pipeline into several sections, and each test pile is provided with a cathodic protection data acquisition and sensing system. The gas pipeline is independently monitored in sections through the test piles arrayed at intervals beside the gas pipeline, and the abnormality of the local section of the gas pipeline can be located in time, so as to improve the accuracy of gas pipeline monitoring and reduce the demand for daily maintenance and measurement. In addition, the cathodic protection data acquisition and sensing system continuously acquires the potential change of the gas pipeline section and transmits the potential change data to the CPU control module. The CPU control module controls the intelligent constant current instrument to adjust the potential value input to the gas pipeline, so as to protect the gas pipeline in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0022] Figure 1 This is a schematic structural diagram of an additional cathodic protection device for an in-service gas pipeline based on data detection provided by the utility model. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0024] Embodiment 1:

[0025] This embodiment 1 provides an additional cathodic protection device for an in-service gas pipeline based on data detection, such as Figure 1 As shown, it includes test piles arranged in an array beside the gas pipeline, the test piles are arranged in an array along the gas pipeline to evenly divide the gas pipeline into several sections, and each test pile is provided with a cathodic protection data acquisition and sensing system;

[0026] Among them, Figure 1 As shown, the above-mentioned cathodic protection data acquisition and perception system includes a front-end processing module, a positioning module, a cathodic protection data acquisition module and an intelligent constant current instrument. The positioning module transmits the position information of the corresponding test pile to the CPU control module, the anode terminal of the intelligent constant current instrument is connected to the buried deep well polarization probe, the cathode terminal of the intelligent constant current instrument is connected to the gas pipeline, and the electrode end of the intelligent constant current instrument is connected to the buried long-term reference electrode; and the cathodic protection data acquisition module is connected to the reference electrode and the gas pipeline respectively, and is used to continuously collect the potential change of the gas pipeline and transmit the potential change data to the front-end processing module. In this embodiment, the cathodic protection data acquisition module continuously collects the DC stray current data and / or the AC stray current on the gas pipeline at a frequency of 1s. The front-end processing module collects and converts the data and transmits it to the CPU control module. The CPU control module is connected to the intelligent constant current instrument to adjust the potential value input by the intelligent constant current instrument to the gas pipeline. Specifically, when the potential change of the gas pipeline is greater than 0.5mV / m or the potential offset between the gas pipeline and the surrounding soil exceeds ±20mV, the CPU control module adjusts the potential value input to the gas pipeline; when the CPU control module detects that the AC disturbance voltage is higher than 4V, the CPU control module transmits the position information of the corresponding test pile to the system platform module. The maintenance personnel can locate which section of the pipeline has an abnormality through the feedback of the system platform module, thereby improving the accuracy of gas pipeline monitoring and reducing the demand for daily maintenance measurements.

[0027] Among them, the system platform module includes a data transmission module and a cloud server. The data transmission module collects data from the CPU control module and transmits the data information to the cloud server through a wired or wireless network. At the same time, the server data is queried, analyzed, warned, and reported through the analysis software in the cloud server. Reports are automatically generated without manual measurement and archiving, thereby improving the traceability and detection efficiency of monitoring data.

[0028] Example 2

[0029] This embodiment 2 provides another additional cathodic protection device for an in-service gas pipeline based on data detection on the basis of embodiment 1, such as Figure 1 As shown, the cathodic protection device also includes an auxiliary acquisition module and a power supply module. The auxiliary acquisition module includes various sensor probes for monitoring the outside of the gas pipeline. The auxiliary acquisition module collects some pipe body parameters in addition to the conventional parameters of the cathodic protection, and assists in evaluating the operation status of the cathodic protection, mainly including ultrasonic monitoring, optical fiber temperature monitoring, optical fiber Bragg grating strain monitoring, ER corrosion monitoring and soil pH monitoring near the pipeline. The auxiliary acquisition module automatically uploads the collected data to the cloud server. The cloud server automatically measures, alarms and analyzes, and can timely discover problems with the cathodic protection, stray current corrosion, and changes in corrosion rate. It is possible to know at any time whether the operation of the cathodic protection is normal and to timely discover damage to the test pile. At the same time, the positioning module can be used to locate and track the equipment after it is stolen.

[0030] The power supply module is set on the test pile. The power supply module provides power for all electrical equipment in the cathodic protection data acquisition and sensing system. Since the gas pipeline may be laid in a variety of environments, the power supply module can be supplemented by solar energy, wind energy or tidal energy according to different environments. The use of high-efficiency clean energy batteries for power supply is the development trend of cathodic protection devices to ensure that the equipment can operate for a long time. At the same time, the use of wind and light complementary power supply can improve the efficiency of intelligent operation of equipment. Especially in some remote areas, the use of high-performance batteries and wind and light complementary power supply can greatly reduce the cost of manual power replacement, so that the intelligent development of cathodic protection is guaranteed.

[0031] Example 3

[0032] This embodiment 3 provides an additional cathodic protection device for an in-service gas pipeline based on data detection on the basis of embodiment 1 or embodiment 2. The difference lies in that the outer shell of the test pile is made of hot-dip galvanized steel, and the outer surface of the test pile is sprayed with long-term anti-corrosion paint, so that the cathodic protection data acquisition and sensing system meets the requirements of long-term outdoor work.

[0033] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. Additional cathodic protection device for in-service gas pipeline based on data detection, characterized in that: It includes test piles arranged in an array at intervals beside a gas pipeline, each of which is provided with a cathodic protection data acquisition and sensing system; The cathodic protection data acquisition and sensing system includes a positioning module, a cathodic protection data acquisition module and an intelligent constant current instrument. The anode terminal of the intelligent constant current instrument is connected to a buried deep well polarization probe, the cathode terminal of the intelligent constant current instrument is connected to a gas pipeline, and the electrode terminal of the intelligent constant current instrument is connected to a buried long-term reference electrode. The cathodic protection data acquisition module is connected to the reference electrode and the gas pipeline respectively, and is used to continuously collect the potential change of the gas pipeline and transmit the potential change data to the CPU control module. The CPU control module is connected to the intelligent constant current instrument to adjust the potential value input to the gas pipeline by the intelligent constant current instrument; The positioning module transmits the position information corresponding to the test pile to the CPU control module.

2. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 1 is characterized in that: The cathodic protection data acquisition module acquires and stores data on the potential of the gas pipeline at a frequency of 1s to 3s.

3. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 1 is characterized in that: The cathodic protection data acquisition module acquires DC stray current and / or AC stray current on the gas pipeline.

4. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 3 is characterized in that: When the potential change of the gas pipeline is greater than 0.5 mV / m or the potential offset between the gas pipeline and the surrounding soil exceeds ±20 mV, the CPU control module adjusts the potential value input to the gas pipeline.

5. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 3 or 4, characterized in that: When the CPU control module detects that the AC disturbance voltage is higher than 4V, the CPU control module transmits the position information of the corresponding test pile to the system platform module.

6. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 5 is characterized in that: The system platform module includes a data remote transmission module and a cloud server. The data remote transmission module collects data from the CPU control module and transmits the data information to the cloud server via a wired or wireless network.

7. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 1 is characterized in that: A front-end processing module is also provided between the cathode protection data acquisition module and the CPU control module. The front-end processing module acquires and converts the front-end data and transmits the data to the CPU control module.

8. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 1 is characterized in that: The cathode protection device also includes an auxiliary acquisition module, which includes various sensor probes for monitoring the outside of the gas pipeline.

9. The additional cathodic protection device for in-service gas pipelines based on data detection according to claim 1 is characterized in that: The cathodic protection device also includes a power supply module, which is arranged on the test pile. The power supply module provides power for the cathodic protection data acquisition and sensing system, and the power supply module supplements electric energy through efficient and clean energy.

10. The additional cathodic protection device for an in-service gas pipeline based on data detection according to claim 1, characterized in that: The shell of the test pile is made of hot-dip galvanized steel, and the outer surface of the test pile is sprayed with long-term anti-corrosion paint.

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