CN118793950A - A device and method for comprehensive evaluation of buried pipeline corrosion monitoring - Google Patents

Abstract

The invention discloses a comprehensive evaluation device and a comprehensive evaluation method for corrosion monitoring of a buried pipeline, which belong to the field of corrosion monitoring and comprise the following steps: the intelligent multi-parameter RTU module, the four-channel vibrating wire acquisition module, the GNSS monitoring station, the GNSS monitoring reference station and the remote corrosion on-line monitoring module which are respectively connected with the intelligent multi-parameter RTU module can monitor crack expansion rate, cathode potential, geological displacement condition and pipe wall corrosion condition of the buried pipeline and comprehensively evaluate the corrosion of the buried pipeline. According to the invention, the buried pipeline corrosion evaluation result with higher precision and convenient understanding by operators can be obtained, the buried pipeline position with potential corrosion cracking risk can be found, and leakage accidents of the buried pipeline can be effectively prevented; meanwhile, the invention can carry out data transmission with an external upper computer, establishes a data processing platform comprising a plurality of intelligent multi-parameter RTU modules, uniformly carries out data integration analysis, and improves the maintenance decision efficiency.

Description

A device and method for comprehensive evaluation of buried pipeline corrosion monitoring

Technical Field

The invention belongs to the field of corrosion monitoring, and specifically provides a device and method for comprehensive evaluation of corrosion monitoring of buried pipelines.

Background Art

Pipeline corrosion refers to the corrosion phenomenon caused by chemical or electrochemical reactions between the part of the pipeline that transports liquid or gas and the soil, groundwater, seawater or other media in contact with the external environment. Pipeline corrosion will cause the gradual loss of pipeline materials, resulting in thinning of pipeline wall thickness and reduced strength of pipeline materials. In severe cases, pipeline rupture may occur, causing leakage accidents of pipeline transported liquid or gas, polluting the ecological environment around the pipeline and even the safety of life and property of nearby residents. For example, leakage of oil and gas pipelines may cause fires, explosions and other consequences, and will also cause huge economic losses. Therefore, effective prevention and control of pipeline corrosion is of great significance to ensuring social public safety, environmental protection and economic development.

Corrosion monitors can monitor real-time data of buried pipeline corrosion, but they lack predictive corrosion monitoring. The data provided by corrosion monitors are mainly used to evaluate the current corrosion status of buried pipelines. They cannot predict and evaluate future corrosion trends of buried pipelines, making it difficult to make effective decisions on buried pipeline maintenance. At the same time, they cannot monitor stress changes and geological changes in buried pipelines, and lack the ability to promptly detect ruptures of buried pipelines caused by external squeezing, stretching, twisting and other stress changes. In addition, corrosion monitors may malfunction, fail or give false alarms, which may delay buried pipeline maintenance and lead to the mistaken belief that the pipeline is in a safe state. Effective verification and confirmation of the monitoring data is required.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, the present invention provides a buried pipeline corrosion monitoring comprehensive evaluation device and method, which can solve the problem that the corrosion monitor cannot predict the future corrosion trend of the buried pipeline, the problem that the buried pipeline rupture caused by geological activities cannot be monitored, and the problem that the corrosion monitor cannot confirm the error data due to fault output.

In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a buried pipeline corrosion monitoring and comprehensive evaluation device, comprising: an intelligent multi-parameter RTU module, a four-channel vibrating string acquisition module respectively connected to the intelligent multi-parameter RTU module, a GNSS monitoring station, a GNSS monitoring base station and a remote corrosion online monitoring module, wherein the four-channel vibrating string acquisition module is respectively connected to four vibrating string sensors;

The four-channel vibrating string acquisition module is used to process and analyze the buried pipeline data collected by the vibrating string sensor and transmit it to the intelligent multi-parameter RTU module;

The GNSS monitoring station is used to monitor the displacement data of the surrounding environment of the buried pipeline and transmit it to the intelligent multi-parameter RTU module;

The GNSS monitoring base station is used to monitor the displacement data of the surrounding environment of the buried pipeline with high positioning accuracy and stability, and generate differential correction information, and transmit the differential correction information to the intelligent multi-parameter RTU module;

The remote corrosion online monitoring module includes a remote corrosion online monitoring instrument and a probe tooling, which is used to monitor the corrosion of the pipe wall of the buried pipeline and transmit it to the intelligent multi-parameter RTU module;

The intelligent multi-parameter RTU module is used to monitor the cathode potential of the buried pipeline through the cathode potential monitoring channel and process and analyze the received data.

The beneficial effects of the present invention are as follows: the present invention monitors the crack growth rate, cathode potential, geological displacement and corrosion of the buried pipeline respectively through a vibrating string sensor, a four-channel vibrating string acquisition module, a cathode potential monitoring channel, a GNSS monitoring station and a remote corrosion online monitoring module. Through the crack growth rate, cathode potential and geological displacement of the buried pipeline, the potential rupture risk of the buried pipeline can be warned in advance, and the corrosion of the buried pipeline can be comprehensively evaluated in combination with the corrosion of the buried pipeline. At the same time, the pipe wall corrosion output by the remote corrosion online monitoring module can be verified, and the buried pipeline can be effectively prevented from being damaged and leaked due to corrosion. At the same time, the intelligent multi-parameter RTU module can transmit data with an external host computer, and the host computer can transmit data with several intelligent multi-parameter RTU modules, and unified data integration and analysis can be performed to improve the management and decision-making efficiency of buried pipeline corrosion monitoring.

Further: the intelligent multi-parameter RTU module is connected to the 8-core wire of the communication port of the four-channel vibrating string acquisition module through a 4-core male connector;

The intelligent multi-parameter RTU module is connected to the red core wire of the communication port of the four-channel vibrating string acquisition module through the red core wire of the 4-core male connector;

The intelligent multi-parameter RTU module is connected to the yellow core wire of the communication port of the four-channel vibrating string acquisition module through the black core wire of the 4-core male connector;

The intelligent multi-parameter RTU module is connected to the white core wire of the communication port of the four-channel vibrating string acquisition module through the white core wire of the 4-core male connector;

The intelligent multi-parameter RTU module is connected to the blue core wire of the communication port of the four-channel vibrating string acquisition module through the blue core wire of the 4-core male connector.

The beneficial effect of the above further scheme is that the intelligent multi-parameter RTU module can detect and analyze the stress of the buried pipeline by connecting with the four-channel vibrating string acquisition module, so as to facilitate the subsequent evaluation of the crack growth rate of the buried pipeline.

Further: the vibrating string channels of the four-channel vibrating string acquisition module are respectively connected to four vibrating string sensors;

The black core wires of the vibrating string channels of the four-channel vibrating string acquisition module are all connected to the black core wires of the four vibrating string sensors;

The white core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the first vibrating string sensor;

The brown core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the second vibrating string sensor;

The blue core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the third vibrating string sensor;

The grey core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the fourth vibrating string sensor.

The beneficial effects of the above further scheme are: through 4 vibrating string sensors, the four-channel vibrating string acquisition module can simultaneously detect the stress at multiple different positions of the buried pipeline, improve the detection efficiency, and at the same time make a preliminary judgment on the distribution of the crack growth rate of the buried pipeline, find the area with greater stress on the buried pipeline, give priority to maintenance, and prevent local cracks from expanding to the whole area.

Furthermore: the antenna port of the intelligent multi-parameter RTU module is connected to the GNSS antenna; the GNSS antenna is wirelessly connected to the GNSS monitoring station and the GNSS monitoring base station.

The beneficial effect of the above further scheme is: the present invention is connected to the GNSS monitoring station and the GNSS monitoring base station through the GNSS antenna, so as to detect the displacement of the surrounding environment of the buried pipeline, and to give early warning of stress changes such as extrusion, stretching, and twisting caused by geological activities on the buried pipeline, so as to prevent the buried pipeline from rupture and leakage due to excessive stress changes.

Furthermore: the intelligent multi-parameter RTU module is wirelessly connected to the remote corrosion online monitoring module; the remote corrosion online monitoring module includes: a remote corrosion online monitor and a probe tooling.

The beneficial effects of the above further scheme are: the remote corrosion online monitor and the probe tooling can continuously and in real time detect the corrosion status of the pipe wall of the buried pipeline, timely discover the corrosion of the buried pipeline, and obtain high-precision corrosion results of the buried pipeline that are easy for operators to understand.

The present invention also provides a method for comprehensive evaluation of buried pipeline corrosion monitoring, comprising the following steps:

S1: Use a vibrating wire sensor to monitor the vibration frequency outside the buried pipeline and calculate the crack growth rate of the buried pipeline;

S2: Using the cathode potential monitoring channel of the intelligent multi-parameter RTU module, the cathode potential of the buried pipeline is monitored to obtain the cathode potential of the buried pipeline;

S3: Use GNSS monitoring stations and GNSS monitoring base stations to monitor the displacement data of the surrounding environment of the buried pipeline, and calibrate it through differential correction information to obtain the geological displacement of the buried pipeline;

S4: Monitor the buried pipeline using the remote corrosion monitoring module to obtain the corrosion status of the buried pipeline wall;

S5: Comprehensively evaluate the corrosion of buried pipelines based on the crack growth rate of buried pipelines, cathode potential of buried pipelines, geological displacement of buried pipelines and corrosion of buried pipeline walls.

The beneficial effects of the present invention are as follows: the present invention can detect and comprehensively evaluate the crack growth rate, cathode potential, geological displacement and pipe wall corrosion of the buried pipeline. Through the crack growth rate, cathode potential and geological displacement of the buried pipeline, the position of the buried pipeline with potential corrosion risk can be discovered, and a comprehensive evaluation can be performed in combination with the pipe wall corrosion of the buried pipeline. At the same time, the pipe wall corrosion output by the remote corrosion online monitoring module can be verified, effectively preventing the buried pipeline from being damaged or leaking due to corrosion, and improving the maintenance and management efficiency of the buried pipeline.

Further: the specific steps of S1 are as follows:

S101: using a vibrating wire sensor to monitor the vibration frequency outside the buried pipeline, and calculating the stress intensity factor of the buried pipeline;

S102: Compare the stress intensity factor of the buried pipeline with the critical stress intensity factor of stress corrosion of the buried pipeline. If the stress intensity factor of the buried pipeline is greater than the critical stress intensity factor of stress corrosion of the buried pipeline, stress corrosion cracking exists in the buried pipeline, and enter S103; otherwise, stress corrosion cracking does not exist in the buried pipeline, and enter S2;

S103: According to the stress intensity factor of the buried pipeline, the crack growth rate of the buried pipeline is calculated using the Paris formula, and then enters S2.

The beneficial effects of the above further scheme are: using the vibrating string sensor, the vibration frequency of the buried pipeline can be monitored in real time, potential buried pipeline stress anomalies can be identified, and early warning of rupture, leakage and deformation of the buried pipeline can be given, thereby ensuring the normal operation of the buried pipeline.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a structural diagram of a buried pipeline corrosion monitoring and comprehensive evaluation device;

FIG2 is a flow chart of a comprehensive evaluation method for monitoring corrosion of buried pipelines.

DETAILED DESCRIPTION

The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

Example 1

As shown in FIG1 , in this embodiment, the present invention provides a buried pipeline corrosion monitoring and comprehensive evaluation device, comprising: an intelligent multi-parameter RTU module, a four-channel vibrating string acquisition module respectively connected to the intelligent multi-parameter RTU module, a GNSS monitoring station, a GNSS monitoring base station and a remote corrosion online monitoring module, wherein the four-channel vibrating string acquisition module is respectively connected to four vibrating string sensors;

Four-channel vibrating string acquisition module, used to process and analyze the buried pipeline data collected by the vibrating string sensor and transmit it to the intelligent multi-parameter RTU module;

GNSS monitoring station, used to monitor displacement data around buried pipelines and transmit it to the intelligent multi-parameter RTU module;

GNSS monitoring base station is used to monitor the displacement data of the surrounding environment of the buried pipeline with high positioning accuracy and stability, generate differential correction information, and transmit the differential correction information to the intelligent multi-parameter RTU module;

Remote corrosion online monitoring module, including remote corrosion online monitoring instrument and probe tooling, is used to monitor the corrosion of the buried pipeline wall and transmit it to the intelligent multi-parameter RTU module;

The intelligent multi-parameter RTU module is used to monitor the cathode potential of the buried pipeline through the cathode potential monitoring channel and process and analyze the received data.

In this embodiment, the intelligent multi-parameter RTU module is connected to the 8-core wire of the communication port of the four-channel vibrating wire acquisition module through a 4-core male connector; the specific connection method is as follows:

The intelligent multi-parameter RTU module is connected to the red core wire of the communication port of the four-channel vibrating string acquisition module through the red core wire of the 4-core male connector;

The intelligent multi-parameter RTU module is connected to the yellow core wire of the communication port of the four-channel vibrating string acquisition module through the black core wire of the 4-core male connector;

The intelligent multi-parameter RTU module is connected to the white core wire of the communication port of the four-channel vibrating string acquisition module through the white core wire of the 4-core male connector;

The intelligent multi-parameter RTU module is connected to the blue core wire of the communication port of the four-channel vibrating string acquisition module through the blue core wire of the 4-core male connector.

In this embodiment, the vibrating string channels of the four-channel vibrating string acquisition module are respectively connected to four vibrating string sensors;

Among them, the black core wires of the vibrating string channels of the four-channel vibrating string acquisition module are all connected to the black core wires of the four vibrating string sensors;

The white core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the first vibrating string sensor to serve as the vibrating string sensor of the first channel;

The brown core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the second vibrating string sensor to serve as the vibrating string sensor of the second channel;

The blue core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the third vibrating string sensor to serve as the vibrating string sensor of the third channel;

The gray core wire of the vibrating string channel of the four-channel vibrating string acquisition module is connected to the red core wire of the fourth vibrating string sensor to serve as the vibrating string sensor of the fourth channel.

In this embodiment, the antenna port of the intelligent multi-parameter RTU module is connected to the GNSS antenna, and wirelessly connects and communicates with the GNSS monitoring station and the GNSS monitoring base station through the GNSS antenna; the intelligent multi-parameter RTU module is wirelessly connected to the remote corrosion online monitoring module; the remote corrosion online monitoring module includes: a remote corrosion online monitor and a probe tool, wherein the probe tool is fixed to the pipeline by magnetic attraction and sealed to the pipeline with a viscoelastic body, and the monitored data is transmitted to the remote corrosion online monitor by wire, and the remote corrosion online monitor transmits the data to the intelligent multi-parameter RTU module by wireless transmission.

The working process of the device of the present invention is described below:

The vibrating string sensor is installed on the pipeline, which can monitor the vibration frequency of the vibrating string and transmit it to the four-channel vibrating string acquisition module. The four-channel vibrating string acquisition module performs preliminary processing and calculation on the collected data to obtain the stress of the buried pipeline and transmit it to the intelligent multi-parameter RTU module. The GNSS monitoring station and the GNSS monitoring base station are installed in an open position above the buried pipeline. They can monitor and calibrate the geological displacement of the surrounding environment of the buried pipeline and transmit the displacement data of the buried pipeline to the intelligent multi-parameter RTU module through the GNSS antenna. The remote corrosion online monitor monitors the wall corrosion of the buried pipeline through the tooling probe and transmits it wirelessly to the intelligent multi-parameter RTU module; the intelligent multi-parameter RTU module processes all the received data to obtain the comprehensive corrosion assessment results of the buried pipeline, and can transmit the data to the external host computer through wired or wireless transmission for data integration and analysis.

The beneficial effects of the present invention are as follows: the present invention monitors the crack growth rate, cathode potential, geological displacement and corrosion of the buried pipeline respectively through the vibrating string sensor, the four-channel vibrating string acquisition module, the cathode potential monitoring channel, the GNSS monitoring station and the remote corrosion online monitoring module. The potential rupture risk of the buried pipeline can be warned in advance through the crack growth rate, cathode potential and geological displacement of the buried pipeline, and the corrosion of the buried pipeline can be comprehensively evaluated in combination with the corrosion of the buried pipeline. At the same time, the pipe wall corrosion output by the remote corrosion online monitoring module can be verified, and the damage and leakage accidents of the buried pipeline caused by corrosion can be effectively prevented. At the same time, the intelligent multi-parameter RTU module can transmit data with the external host computer, and the host computer can transmit data with several intelligent multi-parameter RTU modules, and unified data integration and analysis can be performed to improve the management and decision-making efficiency of buried pipeline corrosion monitoring.

Example 2

As shown in FIG2 , the present invention also provides a method for comprehensive evaluation of buried pipeline corrosion monitoring, comprising the following steps:

S1: Use a vibrating wire sensor to monitor the vibration frequency outside the buried pipeline and calculate the crack growth rate of the buried pipeline;

S2: Using the cathode potential monitoring channel of the intelligent multi-parameter RTU module, the cathode potential of the buried pipeline is monitored to obtain the cathode potential of the buried pipeline;

S3: Use GNSS monitoring stations and GNSS monitoring base stations to monitor the displacement data of the surrounding environment of the buried pipeline, and calibrate it through differential correction information to obtain the geological displacement of the buried pipeline;

S4: Monitor the buried pipeline using the remote corrosion monitoring module to obtain the corrosion status of the buried pipeline wall;

S5: Comprehensively evaluate the corrosion of buried pipelines based on the crack growth rate of buried pipelines, cathode potential of buried pipelines, geological displacement of buried pipelines and corrosion of buried pipeline walls.

In this embodiment, the specific steps of S1 are as follows:

S101: The vibration frequency outside the buried pipeline is monitored using a vibrating wire sensor, and the stress intensity factor of the buried pipeline is calculated. The calculation expression is as follows:

in, is the stress intensity factor of the buried pipeline, is the string density of the vibrating wire sensor, is the steel string length of the vibrating wire sensor, is the instantaneous vibration frequency of the vibrating string sensor;

S102: comparing the stress intensity factor of the buried pipeline with the critical stress intensity factor of stress corrosion of the buried pipeline. If the stress intensity factor of the buried pipeline is greater than the critical stress intensity factor of stress corrosion of the buried pipeline, stress corrosion cracking exists in the buried pipeline. Otherwise, stress corrosion cracking does not exist in the buried pipeline. The critical stress intensity factor of stress corrosion of the buried pipeline is a property of the buried pipeline itself and can be obtained by testing in the laboratory in advance.

S103: According to the stress intensity factor of the buried pipeline, the four-channel vibrating string acquisition module uses the Paris formula to calculate and obtain the crack growth rate of the buried pipeline. Through the crack growth rate of the buried pipeline, the remaining service life of the buried pipeline can be preliminarily judged. The expression of the crack growth rate is as follows:

in, is the crack depth of the buried pipeline, For time, is the crack growth rate of the buried pipeline, is the stress intensity factor change value, and All are material parameters of buried pipelines.

In S2, the cathode potential of the buried pipeline is obtained and then evaluated. The specific evaluation method is as follows:

Compare the cathode potential of the buried pipeline monitoring point with the cathodic protection potential range of the buried pipeline. If the cathode potential of the buried pipeline monitoring point is within the cathodic protection potential range of the buried pipeline, the cathode potential corrosion rate of the buried pipeline is slow and within the normal range. Otherwise, the cathode potential corrosion rate of the buried pipeline is fast, and technicians are required to carry out anti-corrosion protection near the buried pipeline monitoring potential to prevent corrosion from expanding.

Among them, the cathodic protection potential range of the buried pipeline can refer to the cathodic protection potential formulation standard, and can be tested according to the soil environment where the buried pipeline is located to obtain a more accurate cathodic protection potential range of the buried pipeline.

In S3, the GNSS monitoring station and the GNSS monitoring base station can monitor the geological activities near the buried pipeline. The GNSS monitoring station can provide accurate information on the location, direction, burial depth, coordinates, etc. of the buried pipeline, which is convenient for operators to carry out subsequent maintenance and pipeline planning. At the same time, it can capture the ground deformation of the buried pipeline due to possible geological disasters, and give early warning of rupture and leakage of the buried pipeline due to geological activities, which can avoid or reduce the harm of geological activities to the buried pipeline.

In S4, the remote corrosion monitor can monitor the wall corrosion of the buried pipeline in real time, obtain the metal corrosion rate, corrosion current density and other factors affecting the corrosion rate and corrosion type of the buried pipeline, and obtain the wall thickness, which can intuitively display the corrosion condition of the buried pipeline.

In S5, the health of the buried pipeline is predicted based on the crack growth rate of the buried pipeline; the corrosion rate of the buried pipeline is determined based on the cathode potential of the buried pipeline; the situation in which the buried pipeline is damaged due to the stress change caused by geological changes is discovered in time based on the geological displacement of the buried pipeline; and the pipe wall corrosion output by the remote corrosion monitor is verified based on the crack growth rate of the buried pipeline, the cathode potential of the buried pipeline and the geological displacement of the buried pipeline, to ensure the normal operation of the remote corrosion monitor and the accuracy of the monitoring results.

The beneficial effects of the present invention are as follows: the present invention can detect and comprehensively evaluate the crack growth rate, cathode potential, geological displacement and pipe wall corrosion of the buried pipeline. Through the crack growth rate, cathode potential and displacement of the buried pipeline, the position of the buried pipeline with potential corrosion risk can be discovered, and a comprehensive evaluation can be performed in combination with the pipe wall corrosion of the buried pipeline. At the same time, the pipe wall corrosion output by the remote corrosion online monitoring module can be verified, effectively preventing accidents of damage and leakage of the buried pipeline due to corrosion, and improving the maintenance and management efficiency of the buried pipeline.

Claims (7)

1. An integrated evaluation device for monitoring corrosion of a buried pipeline, comprising: the intelligent multi-parameter RTU module, the four-channel vibrating wire acquisition module, the GNSS monitoring station, the GNSS monitoring reference station and the remote corrosion online monitoring module are respectively connected with the intelligent multi-parameter RTU module, and the four-channel vibrating wire acquisition module is respectively connected with the 4 vibrating wire sensors;

The four-channel vibrating wire acquisition module is used for processing and analyzing buried pipeline data acquired by the vibrating wire sensor and transmitting the buried pipeline data to the intelligent multi-parameter RTU module;

The GNSS monitoring station is used for monitoring displacement data of the surrounding environment of the buried pipeline and transmitting the displacement data to the intelligent multi-parameter RTU module;

The GNSS monitoring reference station is used for monitoring the displacement data of the surrounding environment of the buried pipeline with high positioning precision and stability, generating differential correction information and transmitting the differential correction information to the intelligent multi-parameter RTU module;

The remote corrosion on-line monitoring module comprises a remote corrosion on-line monitor and a probe tool, and is used for monitoring the corrosion condition of the pipe wall of the buried pipeline and transmitting the corrosion condition to the intelligent multi-parameter RTU module;

The intelligent multiparameter RTU module is used for monitoring the cathode potential of the buried pipeline through the cathode potential monitoring channel and processing and analyzing the received data.

2. The comprehensive evaluation device for monitoring the corrosion of the buried pipeline according to claim 1, wherein the intelligent multi-parameter RTU module is connected with an 8-core wire of a communication port of the four-way vibrating wire acquisition module through a 4-core male head;

the intelligent multi-parameter RTU module is connected with the red core wire of the communication port of the four-channel vibrating wire acquisition module through the red core wire of the 4-core male head;

The intelligent multi-parameter RTU module is connected with a yellow core wire of a communication port of the four-way vibrating wire acquisition module through a black core wire of the 4-core male head;

the intelligent multi-parameter RTU module is connected with the white core wire of the communication port of the four-channel vibrating wire acquisition module through the white core wire of the 4-core male head;

The intelligent multi-parameter RTU module is connected with the blue core wire of the communication port of the four-channel vibrating wire acquisition module through the blue core wire of the 4-core male head.

3. The comprehensive evaluation device for monitoring corrosion of buried pipelines according to claim 1, wherein the vibrating wire channels of the four-channel vibrating wire acquisition module are respectively connected with 4 vibrating wire sensors;

The black core wires of the vibrating wire channels of the four-way vibrating wire acquisition module are connected with the black core wires of the 4 vibrating wire sensors;

the white core wire of the vibrating wire channel of the four-channel vibrating wire acquisition module is connected with the red core wire of the first vibrating wire sensor;

the brown core wire of the vibrating wire channel of the four-way vibrating wire acquisition module is connected with the red core wire of the second vibrating wire sensor;

The blue core wire of the vibrating wire channel of the four-channel vibrating wire acquisition module is connected with the red core wire of the third vibrating wire sensor;

and a gray core wire of a vibrating wire channel of the four-channel vibrating wire acquisition module is connected with a red core wire of a fourth vibrating wire sensor.

4. The comprehensive evaluation device for monitoring corrosion of a buried pipeline according to claim 1, wherein an antenna port of the intelligent multi-parameter RTU module is connected with a GNSS antenna; and the GNSS antennas are both in wireless connection with the GNSS monitoring station and the GNSS monitoring reference station.

5. The comprehensive evaluation device for monitoring corrosion of a buried pipeline according to claim 1, wherein the intelligent multi-parameter RTU module is wirelessly connected with a remote corrosion on-line monitoring module; the remote corrosion on-line monitoring module comprises: remote corrosion on-line monitor and probe tool.

6. The comprehensive evaluation method for the corrosion monitoring of the buried pipeline is characterized by comprising the following steps of:

S1: monitoring vibration frequency outside the buried pipeline by using a vibration wire sensor, and calculating to obtain crack expansion rate of the buried pipeline;

S2: monitoring the cathode potential of the buried pipeline by utilizing a cathode potential monitoring channel of the intelligent multiparameter RTU module to obtain the cathode potential of the buried pipeline;

S3: monitoring surrounding environment displacement data of the buried pipeline by using a GNSS monitoring station and a GNSS monitoring reference station, and calibrating the surrounding environment displacement data by using differential correction information to obtain the geological displacement condition of the buried pipeline;

S4: monitoring the buried pipeline by using a remote corrosion monitoring module to obtain the pipe wall corrosion condition of the buried pipeline;

S5: and comprehensively evaluating the corrosion of the buried pipeline according to the crack expansion rate of the buried pipeline, the cathode potential of the buried pipeline, the geological displacement condition of the buried pipeline and the pipe wall corrosion condition of the buried pipeline.

7. The comprehensive evaluation method for corrosion monitoring of buried pipelines according to claim 6, wherein the specific steps of S1 are as follows:

s101: monitoring vibration frequency outside the buried pipeline by using a vibration wire sensor, and calculating to obtain a stress intensity factor received by the buried pipeline;

S102: comparing the stress intensity factor of the buried pipeline with the stress corrosion critical stress intensity factor of the buried pipeline, if the stress intensity factor of the buried pipeline is larger than the stress corrosion critical stress intensity factor of the buried pipeline, the buried pipeline is subjected to stress corrosion cracking and enters S103, otherwise, the buried pipeline is not subjected to stress corrosion cracking and enters S2;

s103: and (2) calculating by utilizing a Paris formula according to the stress intensity factor of the buried pipeline to obtain the crack expansion rate of the buried pipeline, and entering into S2.