CN106835150A - A kind of cathodic protection system polarization potential measuring instrument and evaluation method - Google Patents
A kind of cathodic protection system polarization potential measuring instrument and evaluation method Download PDFInfo
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- CN106835150A CN106835150A CN201710132474.5A CN201710132474A CN106835150A CN 106835150 A CN106835150 A CN 106835150A CN 201710132474 A CN201710132474 A CN 201710132474A CN 106835150 A CN106835150 A CN 106835150A
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- 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
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/32—Pipes
Abstract
The present invention relates to a kind of cathodic protection system polarization potential measuring instrument and evaluation method, polarization potential measuring instrument is to combine with measuring instrumentss together with current interrupter in the present invention, realize that cathodic protection current is interrupted and measurement polarization potential measuring instrumentss are while start process of measurement by a measurement start button, realize clock synchro measure, it is no longer rely on the clock synchronization that gps signal realizes current interrupter and measuring instrumentss, by adding current interruptions module in cathodic protection system and protectorate pipe laying line loop, one pumping signal is provided, and measured and record test point A point current potentials by potential measurement logging modle, by the pipeline current potential for recording cathodic protection system turn-off transient, eliminate the influence of IR drops, accurately obtain pipeline polarization potential value, so as to evaluate the validity of cathodic protection system.
Description
Technical field
The present invention relates to a kind of cathodic protection system measuring instrument and evaluation method, and in particular to a kind of cathodic protection system
Polarization potential measuring instrument and evaluation method.
Background technology
Buried pipeline as oil gas transport vehicle, one of the critical facility of ground surface works, be connection upstream resource and under
The tie of user is swum, because pipeline is embedded in underground for a long time, over time, due to extraneous soil characteristic and landform sedimentation etc.
The influence of factor, pipeline can occur situations such as burn into perforation and leakage, can bring serious economic loss to country, and pipeline is rotten
Erosion can be not only caused outside serious economic loss, and it can also cause the leakage of harmful substance, and environment is polluted, or even also
The disaster accident of burst can be caused, jeopardize personal safety.For the long distance pipeline and collection transmission pipe network that convey natural gas, prevent outside pipeline
The use of rotten technology and construction quality are directly connected to safe operation and the service life of pipeline.Due to Pipeline Crossing Program area landform
Complicated, soil property varies, and buried steel pipeline needs to take different outer anti-corrosion measures.
Cathodic protection is a kind of guard method for controlling electrochemical metal to corrode, in the battery that cathodic protection system is constituted
In, oxidation reaction is concentrated on anode, so as to inhibit as negative electrode by the corrosion on protection metal.In buried steel
The two kinds of cathode protecting process commonly used in pipeline are sacrificial protection and impressed current cathodic protection method, anode loss protection
Method is made up of than being electrically connected with protected metal by the metal or alloy of protection metal current potential more negativity a kind of, in electrolysis
In liquid, the anode of sacrifice realizes protection because relatively more active preferential dissolving, discharges electric current for being polarized by protection metal；It is additional
Current cathodic protection method is, by external dc electric current and impressed current anode, to force electron stream to be flowed to from soil by protection gold
Category, makes to be protected metal structure current potential less than surrounding environment, and impressed current cathodic protection method is mainly for the protection of large-scale or be in
Metal structure in high soil resistivity soil, such as：The defeated buried pipeline of length, large tank group etc..
At present, whether effective Buried steel pipelines cathodic protection system is evaluated, if serve corrosion-resisting function, it is main to use
The polarization potential of Buried steel pipelines is evaluated, and due to various resistance at electric resistance of soil and holiday, IR drops error is sometimes
Up to hundreds of thousands of millivolts, cause buried pipeline cathodic protection to measure the complete distortion of current potential, influence cathodic protection efficiency evaluation
Accuracy.
The measuring instrument of Buried steel pipelines cathodic protection system polarization potential, current China relies primarily on external instrument,
Import instrument is mainly made up of two parts --- and current interrupter and potential measuring instrument, instrument are heavier, expensive, operation
It is complicated, be unfavorable for single carrying and measurement operation；And when being needed when current interrupter and potential measuring instrument measurement polarization potential
Clock synchronization, two parts dependences receive satellite gps signal and realize synchronously, and satellite-signal difference or interior tend not to enough realization polarization
Potential measurement.
The Buried steel pipelines that there is hundreds of thousands kilometer in current China have cathodic protection system, measurement cathodic protection system
Polarization potential is a job for routine, and common universal meter can not measure polarization potential, therefore is badly in need of wanting a kind of light, behaviour
The instrument of cathodic protection system polarization potential can be accurately measured under work convenience, various ambient conditions.
Application publication number CN102337542A, application publication date 2011.07.19, it is entitled《Buried metal pipeline negative electrode is protected
Protecting system detection method and device》Invention, using buried metal pipeline cathode protection system rectifier by GPS synchronously believe
Number control electric current relay periodically turns on and off rectifier and provides pumping signal to buried pipe, using synchronous GPS electricity
Pipe ground voltage is turned on and off between pressure measurement data record instrument measurement starting point and measurement point, while to the lock-in tube ground for measuring
Voltage is recorded and shown, so as to draw the cathode protection condition of buried pipe.
The content of the invention
The object of the present invention is to a kind of cathodic protection system polarization potential measuring instrument and evaluation method are disclosed, in the present invention
Polarization potential measuring instrument is that current interrupter is combined together with measuring instrumentss, is realized by a measurement start button cloudy
Pole protective current is interrupted and measurement polarization potential measuring instrumentss start process of measurement simultaneously, realizes clock synchro measure, no longer according to
The clock synchronization of current interrupter and measuring instrumentss is realized by gps signal, and by recording cathodic protection system turn-off transient
Pipeline current potential, eliminates the influence of IR drops, pipeline polarization potential value is accurately obtained, so as to evaluate the validity of cathodic protection system.
Realizing the technical scheme of cathodic protection system polarization potential measuring instrument of the present invention and evaluation method is：
A kind of cathodic protection system polarization potential measuring instrument, potential measurement logging modle is provided with inside the polarization potential measuring instrument
With current interruptions module, the potential measurement logging modle include potential measurement module, data recordin module and time delay record mould
Block, the current interruptions module is switched including current interruptions, and chip is provided with inside the polarization potential measuring instrument, and the chip connects
Connect potential measurement module, data recordin module, time delay logging modle, current interruptions switch control terminal, display module and control mould
Block, the chip internal is provided with clock module, and the chip connects power supply, the potential measurement module by measuring trigger switch
Connection measurement port and reference potential port, the data recordin module connect an interface for connection computer, the time delay note
Record module connection time delay record regulation controller, the current interruptions switch ends connect an interruptive port respectively, described aobvious
Show that module connects display board, the control module connects control button.
Further, the panel of the polarization potential measuring instrument is provided with display board, measurement trigger switch and connection computer
Interface, the display board both sides and lower section are equipped with control button, reference are additionally provided with the polarization potential measuring instrument panel
Current potential port, measurement port and two interruptive ports, the polarization potential measuring instrument front end face are provided with time delay record regulation control
Device.
Further, the polarization potential measuring instrument is arranged in a rectangular box, and the casing front end face is provided with to be taken
Through hole with for installing time delay record regulation controller with handles.
A kind of cathodic protection system evaluation method, two interruptive ports of the polarization potential measuring instrument are connected by test pencil
Between cathodic protection system and protectorate buried pipeline, forming the electronics in cathodic protection system needs to be surveyed by polarization potential
The loop of protectorate buried pipeline is flowed to after amount instrument, the measurement port of the polarization potential measuring instrument meets test point A by test pencil,
The test point A is located among the loop of cathodic protection system and protectorate buried pipeline, and test point A is near protectorate pipe laying
Line, in the reference potential port insertion soil of the polarization potential measuring instrument, comprises the following steps that：
1）After completing wiring, the measurement trigger switch of polarization potential measuring instrument, the polarization potential measuring instrument internal current are pressed
Interrupt module runs simultaneously with potential measurement logging modle；
2）The current interruptions module opened " logical " cathodic protection system and protectorate pipe laying line loop by N seconds, then by M seconds
The mode of Zhong Guan " disconnected " cathodic protection systems and protectorate pipe laying line loop carries out periodic duty；
3）A points when the potential measurement logging modle measurement data includes that cathodic protection system is powered to protectorate buried pipeline
Current potential（Von values）, the current potential with the shutdown transient A points of cathodic protection system 5（Voff values）, by time delay logging modle 15, can be
The current potential of A points is measured after cathodic protection system power-off after 60-70 milliseconds of time delay（Voff values）；
4）In the case of the measurement of not keys interrupt, the current potential number of multigroup A points will be recorded for a record period by every N+M seconds
According to, and record storage；
5）Multigroup A points potential data is recorded, by the current potential of cathodic protection system shutdown transient A points（Voff values）Evaluate pipeline pole
Change current potential, can accurately remove the influence of IR drops, accurately draw pipeline polarization potential.
Further, the value of the N is 2, and the value of the M is 1.
Further, the potential measurement logging modle is measured and record test point A by copper/saturated copper sulphate reference electrode
Point current potential.
Brief description of the drawings
Fig. 1 is cathodic protection system polarization potential measuring instrument schematic diagram of the present invention；
Fig. 2 is the stereogram of cathodic protection system polarization potential measuring instrument of the present invention；
Fig. 3 is cathodic protection system evaluation method schematic diagram of the present invention；
Fig. 4 is the wiring diagram of cathodic protection system evaluation method of the present invention；
Fig. 5 is the datagram that cathodic protection system evaluation method of the present invention is measured.
The title that each part is marked in figure is as follows：
1st, polarization potential measuring instrument；11st, chip；111st, clock module；12nd, potential measurement logging modle；13rd, potential measurement mould
Block；131st, measurement port；132nd, reference potential port；14th, data recordin module；141st, the interface of computer is connected；15th, time delay note
Record module；151st, time delay record regulation controller；16th, current interruptions module；161st, current interruptions switch；162nd, interruptive port；
17th, display module；171st, display board；18th, control module；181st, control button；2nd, trigger switch is measured；3rd, casing；31st, carry
Handle；32nd, through hole；4th, cathodic protection system；5th, protectorate buried pipeline.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment：A kind of cathodic protection system polarization potential measuring instrument, current potential is provided with inside the polarization potential measuring instrument 1
Surveying record module 12 and current interruptions module 16, the potential measurement logging modle 12 include potential measurement module 13, data
Logging modle 14 and time delay logging modle 15, the current interruptions module 16 include current interruptions switch 161, the polarization potential
Chip 11, connection potential measurement module 13, data recordin module 14, the time delay record mould of the chip 11 are provided with inside measuring instrument 1
Block 15, current interruptions switchs 161 control ends, display module 17 and control module 18, and clock module is provided with inside the chip 11
111, the chip 11 connects power supply, the connection measurement port 131 of potential measurement module 13 and ginseng by measuring trigger switch 2
Current potential port 132 is examined, the data recordin module 14 connects an interface 141 for connection computer, the time delay logging modle 15
Connection time delay record regulation controller 151, the current interruptions switch 161 two ends and connect an interruptive port 162 respectively, described
Display module 17 connect display board 171, the control module 18 connection control button 181, by potential measurement logging modle 12 with
Current interruptions module 16 is incorporated into an instrument, facilitates user to carry, potential measurement logging modle 12 and current interruptions module
16 share a chip 11, a clock module 111 are shared in chip 11, it is ensured that the clock in two module runnings is same
Step, it is not necessary to add GPS receiver signaling module so that instrument is lighter.
The panel of the polarization potential measuring instrument 1 is provided with connecing for display board 171, measurement trigger switch 2 and connection computer
Mouth 141, the both sides of the display board 171 are equipped with control button 181 with lower section, are also set on the panel of polarization potential measuring instrument 1
There are reference potential port 132, measurement port 131 and two interruptive ports 162, the front end face of polarization potential measuring instrument 1 is provided with
Time delay record regulation controller 151.
The polarization potential measuring instrument 1 is arranged in a rectangular box 3, and the front end face of the casing 3 is provided with carrying handle
31 record the through hole 32 for adjusting controller with for installing time delay.
A kind of cathodic protection system evaluation method, two interruptive ports 162 of the polarization potential measuring instrument 1 pass through test pencil
It is connected between cathodic protection system 4 and protectorate buried pipeline 5, the electronics formed in cathodic protection system 4 is needed by pole
The loop of protectorate buried pipeline 5 is flowed to after change potential measuring instrument 1, the measurement port 131 of the polarization potential measuring instrument 1 passes through
Test pencil is connect among the loop of test point A, the test point A positioned at cathodic protection system 4 with protectorate buried pipeline 5, test point A
In protectorate buried pipeline 5, the insertion soil of reference potential port 132 of the polarization potential measuring instrument 1, specific steps are such as
Under：
1）After completing wiring, the measurement trigger switch 2 of polarization potential measuring instrument 1, the inside of the polarization potential measuring instrument 1 electricity are pressed
Stream interrupt module 16 runs simultaneously with potential measurement logging modle 12；
2）The current interruptions module 16 opened " logical " cathodic protection system 4 and the loop of protectorate buried pipeline 5 by N seconds, then
Periodic duty is carried out in the way of M seconds closes " disconnected " cathodic protection system 4 and the loop of protectorate buried pipeline 5；
3）The A when measurement data of potential measurement logging modle 12 includes that cathodic protection system 4 is powered to protectorate buried pipeline 5
The current potential of point（Von values）, the current potential with the shutdown transient A points of cathodic protection system 4（Voff values）, by time delay logging modle 15,
The current potential of A points can be measured after 60-70 milliseconds of time delay after cathodic protection system power-off（Voff values）；
4）In the case of the measurement of not keys interrupt, the current potential number of multigroup A points will be recorded for a record period by every N+M seconds
According to, and record storage；
5）Multigroup A points potential data is recorded, by the current potential of the shutdown transient A points of cathodic protection system 4（Voff values）Evaluate pipeline
Polarization potential, can accurately remove the influence of IR drops, accurately draw pipeline polarization potential：When cathodic protection system 4 is powered, it is assumed that protect
Shield current strength is I, and the current potential V of A points is by the polarization potential and system of pipeline and the electric current I of the equivalent resistance R of soil and system
Product composition, i.e.,：The energization current potential of pipeline（Von）=pipeline polarization potential+IR；When cathodic protection system 4 disconnects moment,
Electric current in cathodic protection system 4 goes to zero, and the polarization potential of pipeline does not disappear with time lengthening again（About 70 milliseconds）, this
When measurement A points current potential be the polarization potential of pipeline, i.e.,：Pipeline switch-off potential（Voff）=pipeline polarization potential+IR=pipelines
Polarization potential+0 × R=pipelines polarization potential+0.
The value of the N is 2, and the value of the M is 1.
The potential measurement logging modle 13 is measured and record test point A point current potentials by copper/saturated copper sulphate reference electrode.
The operation principle of the present embodiment：By current interrupter together with potential measurement instrument combine, by sharing one piece
Control chip 11, is provided with clock module 111, it is ensured that in running inside chip 11, current interruptions module 16 and potential measurement
Module 12 runs simultaneously, so as to remove gps signal receiver module in two instruments, it is ensured that instrument is light small convenient.
Beneficial effects of the present invention are：
1）The current interrupter used in cathodic protection system in buried pipeline will be evaluated to be combined with high accuracy current potential measuring instrumentss
Into a polarization potential measuring instrument, it is easy to carry；
2）Potential measurement logging modle in polarization potential measuring instrument shares a clock with current interruptions module, it is ensured that ran
Clock synchronization in journey, and GPS receiver module in two instruments is removed, reduce the weight of instrument.
When cathodic protection system validity is evaluated, polarization potential measuring instrument can record cathodic protection system and disconnect moment
The current potential of pipeline, the current potential for disconnecting moment pipeline by cathodic protection system more can accurately reacting pipe polarization potential.
Claims (6)
1. a kind of cathodic protection system polarization potential measuring instrument, it is characterised in that be provided with electricity inside the polarization potential measuring instrument
Position surveying record module and current interruptions module, the potential measurement logging modle include potential measurement module, data record mould
Block and time delay logging modle, the current interruptions module are switched including current interruptions, are provided with inside the polarization potential measuring instrument
Chip, it is chip connection potential measurement module, data recordin module, time delay logging modle, current interruptions switch control terminal, aobvious
Show module and control module, the chip internal is provided with clock module, and the chip connects power supply, institute by measuring trigger switch
The connection of potential measurement module measurement port and reference potential port are stated, the data recordin module connects one and connects connecing for computer
Mouthful, the time delay logging modle connection time delay record regulation controller, the current interruptions switch ends are connected in one respectively
Interruptive port, the display module connects display board, and the control module connects control button.
2. cathodic protection system polarization potential measuring instrument according to claim 1, it is characterised in that the polarization potential measurement
The panel of instrument is provided with the interface of display board, measurement trigger switch and connection computer, and the display board both sides are equipped with lower section
Control button, is additionally provided with reference potential port, measurement port and two interruptive ports, institute on the polarization potential measuring instrument panel
State polarization potential measuring instrument front end face and be provided with time delay record regulation controller.
3. cathodic protection system polarization potential measuring instrument according to claim 1, it is characterised in that the polarization potential measurement
Instrument is arranged in a rectangular box, and the casing front end face is provided with carrying handle and records regulation controller with for installing time delay
Through hole.
4. a kind of cathodic protection system evaluation method, it is characterised in that two interruptive ports of the polarization potential measuring instrument lead to
Cross test pencil to be connected between cathodic protection system and protectorate buried pipeline, forming the electronics in cathodic protection system needs to pass through
The loop of protectorate buried pipeline is flowed to after polarization potential measuring instrument, the measurement port of the polarization potential measuring instrument passes through test pencil
Connect among the loop of test point A, the test point A positioned at cathodic protection system with protectorate buried pipeline, test point A is close to and receives
Protection buried pipeline, in the reference potential port insertion soil of the polarization potential measuring instrument, comprises the following steps that：
1）After completing wiring, the measurement trigger switch of polarization potential measuring instrument, the polarization potential measuring instrument internal current are pressed
Interrupt module runs simultaneously with potential measurement logging modle；
2）The current interruptions module opened " logical " cathodic protection system and protectorate pipe laying line loop by N seconds, then by M seconds
The mode of Zhong Guan " disconnected " cathodic protection systems and protectorate pipe laying line loop carries out periodic duty；
3）A points when the potential measurement logging modle measurement data includes that cathodic protection system is powered to protectorate buried pipeline
Current potential（Von values）, the current potential with the shutdown transient A points of cathodic protection system 5（Voff values）, by time delay logging modle 15, can be
The current potential of A points is measured after cathodic protection system power-off after 60-70 milliseconds of time delay（Voff values）；
4）In the case of the measurement of not keys interrupt, the current potential number of multigroup A points will be recorded for a record period by every N+M seconds
According to, and record storage；
5）Multigroup A points potential data is recorded, by the current potential of cathodic protection system shutdown transient A points（Voff values）Evaluate pipeline pole
Change current potential, can accurately remove the influence of IR drops, accurately draw pipeline polarization potential.
5. cathodic protection system evaluation method according to claim 4, it is characterised in that the value of the N is 2, the value of the M
It is 1.
6. cathodic protection system evaluation method according to claim 4, it is characterised in that the potential measurement logging modle is led to
Supersaturated copper sulfate reference electrode measurement and record test point A point current potentials.
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Cited By (5)
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| CN109306490A (en) * | 2017-07-26 | 2019-02-05 | 中国石油天然气股份有限公司 | Cathodic protection test device |
| CN110196452A (en) * | 2019-06-25 | 2019-09-03 | 北京城建勘测设计研究院有限责任公司 | Extraordinary great burying underground piping detection device |
| CN111118502A (en) * | 2020-01-16 | 2020-05-08 | 西安热工研究院有限公司 | Small-caliber heat exchange tube cathode protection potential measuring device and using method |
| WO2021062403A1 (en) * | 2019-09-27 | 2021-04-01 | Borin F W | Automated cathodic protection measurement and communication system and method |
| CN114150322A (en) * | 2020-09-07 | 2022-03-08 | 山东省天然气管道有限责任公司 | Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection |
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| CN114150322A (en) * | 2020-09-07 | 2022-03-08 | 山东省天然气管道有限责任公司 | Portable auxiliary measuring device for measuring on-off potential of pipeline cathodic protection |
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| CN106835150B (en) | 2019-04-05 |
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