CN114959716A - Stray current interference test probe for cathode protection pipeline and intelligent monitoring system - Google Patents
Stray current interference test probe for cathode protection pipeline and intelligent monitoring system Download PDFInfo
- Publication number
- CN114959716A CN114959716A CN202210373741.9A CN202210373741A CN114959716A CN 114959716 A CN114959716 A CN 114959716A CN 202210373741 A CN202210373741 A CN 202210373741A CN 114959716 A CN114959716 A CN 114959716A
- Authority
- CN
- China
- Prior art keywords
- module
- monitoring
- acquisition
- circuit
- stray current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/04—Controlling or regulating desired parameters
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/10—Controlling or regulating parameters
- C23F2213/11—Controlling or regulating parameters for structures subject to stray currents
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A stray current interference test probe and an intelligent monitoring system for a cathode protection pipeline are disclosed, wherein a reference test piece and a test piece are connected with a built-in circuit arranged in a shell, the reference test piece is used as a comparison test piece and sealed in the shell, the surface of the test piece is exposed in the external environment, a corrosion signal and the resistance change of the reference test piece are compared and transmitted to the built-in circuit, the built-in circuit calculates the metal thinning amount, and further the corrosion rate of the external environment is obtained, and the built-in circuit is externally connected with an aviation plug through a test wire; the invention can accurately acquire the cathodic protection performance and the distribution and the size of the stray current by carrying out multiparameter full-coverage acquisition on stray current interference and cathodic protection level, realizes ultrahigh-reliability low-delay communication transmission of detection data, and improves the working efficiency of the processing efficiency of pipeline corrosion prevention and cathodic protection faults.
Description
Technical Field
The invention relates to a cathode protection test probe, in particular to an intelligent monitoring system based on a stray current interference test probe, and belongs to the technical field of corrosion monitoring and cathode protection of oil and gas pipelines.
Background
With the high-speed development of economy in recent years, the construction and development of energy, electric power transmission, railway systems and oil and gas transmission pipelines in China are rapid, and the situations that more basic facilities such as high-power high-voltage/extra-high-voltage transmission lines, electrified railways and the like are crossed with buried oil and gas pipelines and are laid in parallel appear. The problem of adjacent buried pipeline ac stray current interference is becoming more and more common. The interference of the alternating stray current on the pipeline has the following characteristics: resistive interference and inductive interference coexist, and the interference rule is complex; the influence range on the high-insulation anticorrosive layer pipeline is wide; the alternating current induction voltage causes personal safety hidden danger; damage to the pipeline anticorrosive coating and even the pipeline body is caused; normal operation of equipment is influenced, and the equipment can be damaged in serious cases; the problem of corrosion of the buried pipeline caused by alternating current interference is increasingly prominent, the safety and service life of a pipeline transportation system are seriously influenced, and higher requirements are put forward on the safety, reliability and service life of a conveying pipeline.
Cathodic protection is the most common and effective means for controlling corrosion of pipelines, and in order to ensure the effectiveness of cathodic protection, the cathodic protection performance in a test pile needs to be monitored in real time. Most of the existing monitoring means are monitoring the cathode protection potential and the alternating current and direct current, and evaluating the pipeline cathode protection performance and the interference degree of stray current according to the cathode protection potential and the alternating current and direct current values. The corrosion rate is used as a common corrosion evaluation index and is obtained by manually taking out test pieces on site at regular intervals and calculating according to weightlessness, the operation is complex, the time consumption is long, the cost is high, the corrosion rate obtained by the method reflects the corrosion accumulation effect, and the corrosion data cannot be continuously acquired. The resistance probe technology obtains corrosion loss and corrosion rate data by measuring resistance change in the corrosion process of a metal test piece in an environment to be measured. The resistance probe is used as a sensitive element exposed in an environment to be monitored, one surface of the metal test piece is exposed in the environment to be monitored in the monitoring process, current is introduced into the metal test piece, and the corrosion thickness change can be deduced by monitoring the resistance change of the metal test piece, so that the corrosion loss and corrosion rate information can be obtained. Compared with a corrosion weight loss test piece method, the resistance probe technology can realize real-time monitoring of the corrosion rate of the pipeline, and the method is more convenient for the in-service pipeline.
The influence of stray current on underground pipelines is increasingly serious, new requirements are provided for pipeline corrosion control management, the potential and the current of the cathodic protection are monitored singly, so that the instant potential and the current value are the only standard for evaluating the effectiveness of the cathodic protection, test errors can be caused by factors such as test environment, equipment stability and the like, the actual condition of the cathodic protection of a pipeline section and the interference of the stray current cannot be truly reflected by single standard evaluation, and the corrosion condition of the whole pipeline cannot be accurately and comprehensively diagnosed.
Disclosure of Invention
Aiming at the problems in the prior art, the stray current interference test probe and the intelligent monitoring system for the cathode protection pipeline can accurately acquire the cathode protection performance and the stray current distribution and size through multi-parameter full-coverage acquisition of stray current interference and the cathode protection level, and realize ultrahigh-reliability low-delay communication transmission of detection data, so that related personnel at all levels can timely master the real-time operation condition of the pipeline corrosion and cathode protection system, the working efficiency of the processing efficiency of pipeline corrosion prevention and cathode protection faults is improved, and the pipeline network corrosion prevention management is scientifically and reasonably carried out.
In order to achieve the above object, the present invention provides a probe for testing stray current interference of a cathode protection tube, which includes a reference test piece and a test piece disposed in a housing, wherein the reference test piece and the test piece are both electrically connected to a built-in circuit disposed in the housing, the reference test piece is used as a comparison test piece and sealed in the housing, and is not corroded, the surface of the test piece is exposed in an external environment, is in contact with the environment and is corroded, and transmits a corrosion signal to the built-in circuit in comparison with a change of resistance of the reference test piece, the built-in circuit calculates a metal thinning amount, and further obtains a corrosion rate of the external environment, and the built-in circuit is externally connected to an aviation plug through a test wire.
As a further improvement of the present invention, the built-in circuit includes a resistance Rf of a reference test piece and a variable resistance Rx of a test piece, the variable resistance Rx of a section of metal sample in the corrosion process is tested by the test piece, the corrosion margin is calculated by comparing the resistance Rx with the resistance Rf of the reference test piece, the variable resistance Rx of the metal sample gradually increases as the sectional area of the metal sample gradually decreases, the variation of the micro-resistance is measured by using an AV bridge, the metal thinning amount is calculated, and the corrosion rate is obtained by the calculation formula:
in the formula: m is the atomic weight of the metal material;
i corr current density for direct probe testing;
n is the number of transferred electrons and takes the value of 2;
d is the metal density;
f is the faraday constant 96500.
As a further improvement of the invention, the material and the size of the test strip and the reference strip are the same; the sizes of the test strip and the reference test strip can be determined according to the requirement, and the 1cm is selected in the common alternating current stray current interference area 2 The test strip can be 6.5cm in the area with DC stray current interference 2 Or 10cm 2 The thickness of the test strip, or other suitable dimensions, can be adjusted according to the test requirements.
As a further improvement of the invention, the shell is in a rod shape, one tip is in a conical shape or a flat head shape, and the tip of the shell is encapsulated by adopting an injection molding process.
An intelligent monitoring system, comprising the test probe of claims 1-4 and a monitoring system connected with the test probe, wherein the test probe is used for collecting corrosion rate data and uploading the collected corrosion rate data to the monitoring system for being checked by managers conveniently, the monitoring system comprises a wiring board and a multi-parameter data collecting module, the inside of a steel pile body is communicated, two pile doors are arranged at the upper part and the middle part, the wiring board is arranged at the inner part of the upper pile door, all test wires and connecting wires are arranged in the wiring board in a centralized manner, so that field personnel can test conveniently and collect data; inside the placing multi-parameter data acquisition module of middle part stake door, wiring board and multi-parameter data acquisition module all are fixed with the steel pile body through the support draw-in groove, there is the trompil steel pile body lower part for the connecting wire access & exit, multi-parameter data acquisition module's rectangle casing width and height are half for the steel pile body diameter, rectangle casing length is about 2 times PCB board length, multi-parameter data acquisition module connects the antenna respectively, power module and wiring board, the test probe is reserved to the wiring board, from the test block, high-efficient reference electrode and pipeline zero-bit connecting wire.
As a further improvement of the invention, the multi-parameter data acquisition module comprises an on-off potential acquisition circuit, an alternating current potential acquisition circuit, a direct current density acquisition circuit, an alternating current density acquisition circuit, a corrosion rate acquisition circuit and a self-corrosion potential acquisition circuit, wherein the on-off potential acquisition circuit, the alternating current potential acquisition circuit, the direct current density acquisition circuit, the alternating current density acquisition circuit, the corrosion rate acquisition circuit and the self-corrosion potential acquisition circuit transmit respective acquired signals to an input port of the chip processor, the chip processor uploads the signals to an input port of the data transmission module, and the data transmission module transmits data information to the monitoring terminal.
As a further improvement of the invention, the multi-parameter data acquisition module circuit comprises a data clock, a programmable gain amplifier PGA and an A/D analog-to-digital conversion module, wherein after the data clock acquisition signal is amplified by the programmable gain amplifier PGA, the A/D analog-to-digital conversion module is selected for signal analog-to-digital conversion, and then the chip processor is used for completing the processing of the acquisition signal, so that the parameter acquisition is realized, and the acquisition is uploaded after encryption.
As a further improvement of the invention, the data transmission module comprises a 5G communication module, a GPS module and a communication antenna, and is used for wirelessly transmitting data to the monitoring terminal, and the 5G communication module is used for recording and communicating with the monitoring terminal.
As a further improvement of the invention, the monitoring and detecting terminal comprises a remote control module, system software and a terminal upper computer, wherein the remote control module comprises a cathode protection on-line monitoring and detecting module, a stray current interference on-line monitoring and detecting module, a system remote monitoring module and an alarm module; the stray current interference on-line monitoring module comprises a direct current stray current interference monitoring and detecting module, an alternating current stray current interference monitoring and detecting module and a stray current interference analyzing module, wherein the direct current stray current interference monitoring and detecting module is used for judging whether direct current stray current interference exists in the pipeline or not through voltage data acquired by the potential acquisition circuit and current data acquired by the current acquisition circuit; the alternating stray current interference monitoring and detecting module is used for judging whether the pipeline has alternating stray current interference or not through voltage data acquired by the potential acquisition circuit and current data acquired by the current acquisition circuit; the stray current interference analysis module is used for comparing and analyzing the stray current monitoring data with a standard numerical value; the device remote monitoring module is used for remotely controlling each module of the collector so as to report data according to the program set time, and comprises the program settings of standard time setting, data acquisition parameters, instant acquisition, acquisition time and acquisition frequency; the alarm module is used for carrying out alarm prompt immediately when the received potential and current values monitored and detected by the acquisition module exceed the normal range;
the system software displays the data charts of the remote monitoring modules on the desktop of the terminal equipment in a centralized manner; the functions of searching, browsing, contrastive analysis, printing and the like can be realized, and the input and statistics of the pipeline basic parameters and the operation and maintenance data can also be carried out, so that the pipeline condition can be further mastered.
The terminal upper computer is one of a mobile phone, a tablet personal computer or a computer.
Compared with the prior art, the test probe adopts a resistance probe technology, environmental corrosivity evaluation is carried out according to the change of metal resistance, the surface of a test specimen is in contact with the environment and is corroded, the corrosion rate of the test specimen can be tested by comparing the change of the resistance of the test specimen with the change of the resistance of a reference specimen, other cathodic protection and stray current interference parameters such as pipeline on-off potential, alternating current and direct current potential, self-corrosion potential and alternating current and direct current density can be synchronously carried out by the probe, the traditional polarization specimen and the stray current interference test specimen are replaced by a multi-parameter test probe, the instant corrosion rate can be monitored and detected in real time by the multi-parameter test probe without excavating and taking out the test specimen, other parameters are synchronously collected, and the full-coverage collection of stray current interference data and the cathodic protection level is realized; the probe is connected by an aviation plug in a plugging manner, so that the probe is more convenient to replace; by adopting a faster 5G communication mode, the collected data can be timely, stably and rapidly transmitted to the monitoring terminal, and the corrosion condition of the pipeline can be diagnosed immediately; the invention realizes the multi-parameter full-coverage acquisition of stray current interference and cathode protection level, can accurately acquire the cathode protection performance and the distribution and the size of the stray current, realizes the informatization, the visualization, the automation and the systematization of the pipeline running condition and the real-time corrosion state data, forms a smooth and efficient information communication channel, enables related personnel at all levels to timely master the pipeline corrosion and the real-time running condition of a cathode protection system, improves the working efficiency of the processing efficiency of pipeline corrosion protection and cathode protection faults, and scientifically and reasonably performs the corrosion protection management of a pipe network.
Drawings
FIG. 1 is a schematic diagram of the structure of a test probe of the present invention;
FIG. 2 is a schematic diagram of the built-in circuitry of FIG. 1;
FIG. 3 is a functional block diagram of the intelligent monitoring system of the present invention;
FIG. 4 is a circuit schematic of the data acquisition module of the present invention;
figure 5 is a wiring schematic of the wiring block of the present invention.
In the figure: 1. reference test piece, 2, test piece, 3, casing, 4, built-in circuit, 5, test wire, 6, aviation plug.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in FIG. 1, a stray current interference testing probe for a cathode protection tube comprises a reference test strip 1 and a test strip 2 disposed in a housing 3,the reference test piece 1 and the test piece 2 are both electrically connected with a built-in circuit 4 arranged in a shell 3, the reference test piece 1 is used as a comparison test piece and sealed in the shell 3 and cannot be corroded, the surface of the test piece 2 is exposed in an external environment and is in contact with the environment to be corroded, a corrosion signal and the change of the resistance of the reference test piece 1 are compared and transmitted to the built-in circuit 4, the built-in circuit 4 calculates the metal thinning amount, the corrosion rate of the external environment is further obtained, and the built-in circuit 4 is externally connected with an aviation plug 6 through a test wire 5; the material and the size of the test piece 2 are the same as those of the reference piece 1; the sizes of the test strip 2 and the reference test strip 1 can be determined according to the requirement, and the 1cm is selected in the common alternating current stray current interference area 2 The test strip 2 can be 6.5cm in the area with DC stray current interference 2 Or 10cm 2 The thickness of the test strip 2, or other suitable dimensions, can be adjusted according to the test requirements.
The shell 3 is rod-shaped, one tip is conical or flat, and the tip of the shell is packaged by adopting an injection molding process.
As shown in fig. 2, the built-in circuit 4 includes a resistance Rf of the reference test piece 1 and a variable resistance Rx tested by the test piece 2, the variable resistance Rx of a section of metal sample in the corrosion process is tested by the test piece 2, the corrosion margin is calculated by comparing with the resistance Rf of the reference test piece 1, the variable resistance Rx of the metal sample gradually increases as the sectional area of the metal sample gradually decreases, the variation of the micro-resistance is measured by using the AV bridge, the metal thinning amount is calculated, the corrosion rate is obtained, and the calculation formula of the corrosion rate is:
in the formula: m is the atomic weight of the metal material, and the value of iron is 55.85 g;
i corr current density for direct probe testing;
n is the number of transferred electrons, and the value is 2;
d is the metal density and is 7.87g/cm 3 ；
F is the faraday constant 96500.
As shown in figures 3 and 5, an intelligent monitoring system comprises the test probe of claims 1-4 and a monitoring system connected with the test probe, the test probe is used for collecting corrosion rate data and uploading the collected corrosion rate data to the monitoring system for the convenience of the manager to check, the monitoring system comprises a wiring board and a multi-parameter data collecting module, the steel pile body is internally communicated, two pile doors are arranged at the upper part and the middle part, the wiring board is arranged at the inner part of the upper pile door, the multi-parameter data collecting module is arranged at the inner part of the middle pile door, the wiring board and the multi-parameter data collecting module are both fixed with the steel pile body through a bracket clamping groove, an opening is arranged at the lower part of the steel pile body and used for connecting a connecting wire inlet and outlet, the width and the height of a rectangular shell of the multi-parameter data collecting module are half of the diameter of the steel pile body, and the length of the rectangular shell is about 2 times of the length of a PCB (printed circuit board), the multi-parameter data acquisition module is respectively connected with the antenna, the power supply module and the wiring board, and the wiring board is reserved with a test probe, a self-corrosion test piece, a high-efficiency reference electrode and a pipeline zero position connecting wire.
The multi-parameter data acquisition module comprises an on-off potential acquisition circuit, an alternating current potential acquisition circuit, a direct current density acquisition circuit, an alternating current density acquisition circuit, a corrosion rate acquisition circuit and a self-corrosion potential acquisition circuit, wherein the on-off potential acquisition circuit, the alternating current potential acquisition circuit, the direct current density acquisition circuit, the alternating current density acquisition circuit, the corrosion rate acquisition circuit and the self-corrosion potential acquisition circuit transmit respective acquired signals to an input port of a chip processor, the signals are uploaded to an input port of a data transmission module by the chip processor, and the data transmission module transmits data information to a monitoring and detecting terminal.
As shown in fig. 4, the multi-parameter data acquisition module circuit includes a data clock, a programmable gain amplifier PGA, and an a/D analog-to-digital conversion module, where after a data clock acquisition signal is amplified by the programmable gain amplifier PGA, the a/D analog-to-digital conversion module is selected to perform analog-to-digital conversion on the signal, and then the chip processor completes processing of the acquisition signal, so as to realize parameter acquisition and upload after encryption.
The data transmission module comprises a 5G communication module, a GPS module and a communication antenna and is used for wirelessly transmitting data to the monitoring terminal, and the 5G communication module is used for recording and communicating with the monitoring terminal.
The monitoring and detecting terminal comprises a remote control module, system software and a terminal upper computer, wherein the remote control module comprises a cathode protection on-line monitoring and detecting module, a stray current interference on-line monitoring and detecting module, a system remote monitoring module and an alarm module, and the cathode protection on-line monitoring and detecting module comprises an on-off potential monitoring and detecting module and a self-corrosion potential monitoring module and is used for judging the cathode protection state through potential data acquired by a corresponding acquisition circuit; the stray current interference on-line monitoring module comprises a direct current stray current interference monitoring and detecting module, an alternating current stray current interference monitoring and detecting module and a stray current interference analyzing module, wherein the direct current stray current interference monitoring and detecting module is used for judging whether direct current stray current interference exists in the pipeline or not through voltage data acquired by the potential acquisition circuit and current data acquired by the current acquisition circuit; the alternating stray current interference monitoring and detecting module is used for judging whether the pipeline has alternating stray current interference or not through voltage data acquired by the potential acquisition circuit and current data acquired by the current acquisition circuit; the stray current interference analysis module is used for comparing and analyzing the stray current monitoring data with a standard numerical value; the device remote monitoring module is used for remotely controlling each module of the collector so as to report data according to the program set time, and comprises the program settings of standard time setting, data acquisition parameters, instant acquisition, acquisition time and acquisition frequency; the alarm module is used for carrying out alarm prompt immediately when the received potential and current values monitored and detected by the acquisition module exceed the normal range;
the system software displays the data charts of the remote monitoring modules on the desktop of the terminal equipment in a centralized manner; the functions of searching, browsing, contrastive analysis, printing and the like can be realized, and the input and statistics of the pipeline basic parameters and the operation and maintenance data can also be carried out, so that the pipeline condition can be further mastered.
The terminal upper computer is one of a mobile phone, a tablet personal computer or a computer.
Claims (10)
1. The utility model provides a cathodic protection pipeline stray current interference test probe, including reference test block (1) and test block (2) of setting in casing (3), a serial communication port, reference test block (1) and test block (2) all are connected with built-in circuit (4) electricity that sets up in casing (3), reference test block (1) uses and seals in casing (3) as the contrast test block, the surface of test block (2) exposes in external environment, take place to corrode with environmental contact, and pass to built-in circuit (4) with the change contrast of corrosion signal and reference test block (1) resistance, built-in circuit (4) calculate the metal and reduce the thin volume, and then obtain external environment corrosion rate, built-in circuit (4) are through external aviation plug (6) of test wire (5).
2. The probe of claim 1, wherein the built-in circuit (4) comprises a resistance Rf of a reference test piece (1) and a variable resistance Rx tested by a test piece (2), the variable resistance Rx of a section of metal sample in the corrosion process is tested by the test piece (2), the corrosion margin is calculated by comparing the resistance Rx with the resistance Rf of the reference test piece (1), the variable resistance Rx of the metal sample gradually increases as the sectional area of the metal sample gradually decreases, the variation of the micro-resistance is measured by an AV bridge, and the metal thinning amount is calculated to obtain the corrosion rate.
3. The probe for testing the stray current interference of the cathodic protection pipeline as set forth in claim 2, wherein the corrosion rate is calculated by the formula:
in the formula: m is the atomic weight of the metal material;
i corr current density for direct probe testing;
n is the number of transferred electrons and takes the value of 2;
d is the metal density;
f is the faraday constant 96500.
4. The probe for testing the stray current interference of the cathodic protection pipeline as claimed in claim 2, wherein the test strip (2) and the reference strip (1) are the same in material and size.
5. The probe for testing the stray current interference of the cathodic protection tube according to claim 3, wherein the housing (3) is rod-shaped and has a tapered or flat tip, and the tip of the housing is encapsulated by injection molding.
6. An intelligent monitoring system, comprising the test probe as claimed in claims 1-4, wherein the test probe is connected with the monitoring system, the test probe uploads monitoring data to the monitoring system, the monitoring system comprises a wiring board and a multi-parameter data acquisition module, the steel pile body is internally penetrated, two pile doors are arranged at the upper part and the middle part, the wiring board is arranged inside the upper pile door, the multi-parameter data acquisition module is arranged inside the middle pile door, the wiring board and the multi-parameter data acquisition module are fixed with the steel pile body through bracket clamping grooves, an opening is formed at the lower part of the steel pile body and used for connecting a wiring inlet and a wiring outlet, the width and the height of a rectangular shell of the multi-parameter data acquisition module are half of the diameter of the steel pile body, the length of the rectangular shell is about 2 times of that of a PCB (printed circuit board), the multi-parameter data acquisition module is respectively connected with an antenna, a power supply module and the wiring board, the test probe is reserved in the wiring board, The self-corrosion test piece, the high-efficiency reference electrode and the pipeline zero position connecting line.
7. The intelligent monitoring system according to claim 5, wherein the multi-parameter data acquisition module comprises an on-off potential acquisition circuit, an alternating current potential acquisition circuit, a direct current density acquisition circuit, an alternating current density acquisition circuit, a corrosion rate acquisition circuit and a self-corrosion potential acquisition circuit, wherein the on-off potential acquisition circuit, the alternating current potential acquisition circuit, the direct current density acquisition circuit, the alternating current density acquisition circuit, the corrosion rate acquisition circuit and the self-corrosion potential acquisition circuit transmit respective acquired signals to an input port of the chip processor, the signals are uploaded to an input port of the data transmission module by the chip processor, and the data transmission module transmits data information to the monitoring terminal.
8. The intelligent monitoring system according to claim 6, wherein the multi-parameter data acquisition module circuit comprises a data clock, a programmable gain amplifier PGA, and an A/D analog-to-digital conversion module, wherein after the data clock acquisition signal is amplified by the programmable gain amplifier PGA, the A/D analog-to-digital conversion module is selected for signal analog-to-digital conversion, and then the chip processor completes the processing of the acquisition signal to realize the parameter acquisition and the uploading after the encryption.
9. The intelligent monitoring system according to claim 6, wherein the data transmission module comprises a 5G communication module, a GPS module and a communication antenna, and is used for wirelessly transmitting data to the monitoring terminal, and the 5G communication module is used for recording and communicating with the monitoring terminal.
10. The intelligent monitoring system of claim 6, wherein the monitoring terminal comprises a remote control module, system software and a terminal upper computer, the remote control module comprises a cathodic protection on-line monitoring module, a stray current interference on-line monitoring module, a system remote monitoring module and an alarm module, and the cathodic protection on-line monitoring module comprises an on-off potential monitoring module and a self-corrosion potential monitoring module and is used for judging the cathodic protection state through potential data acquired by a corresponding acquisition circuit; the stray current interference on-line monitoring module comprises a direct current stray current interference monitoring and detecting module, an alternating current stray current interference monitoring and detecting module and a stray current interference analyzing module, wherein the direct current stray current interference monitoring and detecting module is used for judging whether direct current stray current interference exists in the pipeline or not through voltage data acquired by the potential acquisition circuit and current data acquired by the current acquisition circuit; the alternating stray current interference monitoring and detecting module is used for judging whether the pipeline has alternating stray current interference or not through voltage data acquired by the potential acquisition circuit and current data acquired by the current acquisition circuit; the stray current interference analysis module is used for comparing and analyzing the stray current monitoring data with a standard numerical value; the device remote monitoring module is used for remotely controlling each module of the collector so as to report data according to the program set time, and comprises the program settings of standard time setting, data acquisition parameters, instant acquisition, acquisition time and acquisition frequency; the alarm module is used for carrying out alarm prompt immediately when the received potential and current values monitored and detected by the acquisition module exceed the normal range;
the system software displays the data charts of the remote monitoring modules on the desktop of the terminal equipment in a centralized manner;
the terminal upper computer is one of a mobile phone, a tablet personal computer or a computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373741.9A CN114959716A (en) | 2022-04-11 | 2022-04-11 | Stray current interference test probe for cathode protection pipeline and intelligent monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210373741.9A CN114959716A (en) | 2022-04-11 | 2022-04-11 | Stray current interference test probe for cathode protection pipeline and intelligent monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114959716A true CN114959716A (en) | 2022-08-30 |
Family
ID=82977541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210373741.9A Pending CN114959716A (en) | 2022-04-11 | 2022-04-11 | Stray current interference test probe for cathode protection pipeline and intelligent monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114959716A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598047A (en) * | 2022-10-25 | 2023-01-13 | 西南石油大学（Cn） | Automatic pipeline corrosion rate measuring instrument and application thereof |
| CN116678818A (en) * | 2023-04-17 | 2023-09-01 | 北京市鼎新新技术有限责任公司 | Portable testing tool and testing method for high corrosion risk point of buried gas pipeline |
| CN117821984A (en) * | 2024-03-04 | 2024-04-05 | 成都秦川物联网科技股份有限公司 | Intelligent gas pipeline cathode protection intelligent detection method and Internet of things system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505256A (en) * | 2017-09-13 | 2017-12-22 | 大连理工大学 | Weld corrosion monitoring device and its monitoring method under stress can be simulated |
| CN110031392A (en) * | 2019-04-30 | 2019-07-19 | 大庆市华藏油田科技开发有限公司 | The remote control ginseng system of oil field pipe corrosion monitoring and the monitoring stake with the system |
| CN112430817A (en) * | 2020-09-27 | 2021-03-02 | 北京科技大学 | Split type device and method for buried metal pipeline corrosion parameter test probe |
| CN113970516A (en) * | 2021-09-26 | 2022-01-25 | 北京航空航天大学 | Metal material corrosion monitoring system and method |
-
2022
- 2022-04-11 CN CN202210373741.9A patent/CN114959716A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505256A (en) * | 2017-09-13 | 2017-12-22 | 大连理工大学 | Weld corrosion monitoring device and its monitoring method under stress can be simulated |
| CN110031392A (en) * | 2019-04-30 | 2019-07-19 | 大庆市华藏油田科技开发有限公司 | The remote control ginseng system of oil field pipe corrosion monitoring and the monitoring stake with the system |
| CN112430817A (en) * | 2020-09-27 | 2021-03-02 | 北京科技大学 | Split type device and method for buried metal pipeline corrosion parameter test probe |
| CN113970516A (en) * | 2021-09-26 | 2022-01-25 | 北京航空航天大学 | Metal material corrosion monitoring system and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115598047A (en) * | 2022-10-25 | 2023-01-13 | 西南石油大学（Cn） | Automatic pipeline corrosion rate measuring instrument and application thereof |
| CN116678818A (en) * | 2023-04-17 | 2023-09-01 | 北京市鼎新新技术有限责任公司 | Portable testing tool and testing method for high corrosion risk point of buried gas pipeline |
| CN117821984A (en) * | 2024-03-04 | 2024-04-05 | 成都秦川物联网科技股份有限公司 | Intelligent gas pipeline cathode protection intelligent detection method and Internet of things system |
| CN117821984B (en) * | 2024-03-04 | 2024-05-24 | 成都秦川物联网科技股份有限公司 | Intelligent gas pipeline cathode protection intelligent detection method and Internet of things system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114959716A (en) | Stray current interference test probe for cathode protection pipeline and intelligent monitoring system | |
| CN107024629B (en) | State detection and evaluation system and state evaluation method for power oil-less equipment | |
| CN106771900A (en) | Switch cubicle big data state evaluating method and system based on intelligent shelf depreciation live detection | |
| CN101576593B (en) | Array type inferior insulator local electric field detector and inverse diagnosis method | |
| CN202994931U (en) | Lightning arrester state monitoring device based on wireless sensing technology | |
| CN204536448U (en) | A kind of high voltage supply leakage conductor wireless monitoring device | |
| CN112630585B (en) | Distribution cable partial discharge live detection system and detection method | |
| CN205880122U (en) | Railway link up line cord running state monitoring devices | |
| CN105258765A (en) | Dam body hydrostatic level in situ automatic monitoring system and method | |
| CN204214974U (en) | High voltage power cable terminal on-Line Monitor Device | |
| CN112526240A (en) | Non-contact broadband overvoltage online monitoring device | |
| CN109459467B (en) | Internet of things system for remotely monitoring soil environment and corrosivity in situ | |
| CN208937478U (en) | A kind of oil pipeline anticorrosion ability on-line monitoring system | |
| CN207007990U (en) | A kind of state monitoring apparatus of Partial Discharge in Power Transformer | |
| CN109374513A (en) | Pipeline external anti-corrosion layer testing and analysis system | |
| CN105758554A (en) | Power transmission line temperature online monitoring system and method, and application | |
| CN107085147A (en) | Distribution grounding resistance on-line monitoring system | |
| CN213517304U (en) | Monitoring device for potential change of town gas pipeline | |
| CN101937049A (en) | Estimator for monitoring online state of power cable by ultraviolet method | |
| CN117092390A (en) | Power grid electricity larceny monitoring and positioning method | |
| CN207074258U (en) | Monitor the device of communication base station and electric power power supply state | |
| CN205027414U (en) | Dam body hydrostatic level normal position automatic monitoring system | |
| CN114459532A (en) | Passive wireless partial discharge and temperature and humidity composite sensing monitoring system | |
| CN201681137U (en) | Cross-linked polyethylene power cable failure online early warning device | |
| CN104090155B (en) | Ring network T-joint integral high-voltage electric energy intelligent metering method and apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |