CN201662525U - Cathode protection monitoring probe and cathode protection monitoring probe monitoring system - Google Patents
Cathode protection monitoring probe and cathode protection monitoring probe monitoring system Download PDFInfo
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- CN201662525U CN201662525U CN2010201559975U CN201020155997U CN201662525U CN 201662525 U CN201662525 U CN 201662525U CN 2010201559975 U CN2010201559975 U CN 2010201559975U CN 201020155997 U CN201020155997 U CN 201020155997U CN 201662525 U CN201662525 U CN 201662525U
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Abstract
The utility model relates to a cathode protection monitoring probe and a cathode protection monitoring probe monitoring system. A probe main body is integrally cylindrical. A probe core body is integrally cylindrical and is provided with a hollow blind hole. A hollow hole is a probe core chamber. An electrode wiring hole is arranged at the upper part of the probe core body. The electrode wiring hole penetrates through the cylindrical wall of the probe core body and is communicated with the probe core chamber. A cathode wiring hole is arranged at the lower part of the probe core body. The cathode wiring hole penetrates through the cylindrical wall of the probe core body and is communicated with the probe core chamber. A reference electrode is arranged in the probe core chamber. A fixing layer is arranged between the reference electrode and the cylindrical wall of the probe core body and the reference electrode is firmly fixed in the probe core body. The utility model has the advantages of scientific design, reasonable structure, reliable performance, wide application scope, high stability, high polarization resistance and stable probe quality, and can be widely used for pipe delivery of all kinds of fluid materials such as crude oil, natural gas, tapping water, urban liquefied gas in fields of roads, railways, water transportation, aviation, industrial and agricultural industry and the like.
Description
Technical field
The utility model relates to a kind of galvanic corrosion detection technique, relates in particular to a kind of cathodic protection monitoring probe and cathodic protection monitoring probe monitoring system.
Background technology
Fluid line is one of highway, railway, water transport and aviation five big means of transportation arranged side by side, especially buried pipe is deep into various aspects such as energy supply, urban development and people's lives, be widely used in the conveying of various fluid foods in crude oil, rock gas, tap water, city liquefied gas and the process industry field, in national economy, play a part very important, but buried pipe transports easily simultaneously providing for people, and the problem that buried pipe lost efficacy has been brought great potential safety hazard to pipeline transportation.The failure mode of buried pipe is various, and the mechanism complexity as fault in material, burn into outside destroy etc., has tangible locality, risk and sudden.
The PCCP pipeline (be Prestressed concrete cylinder pipe hereinafter to be referred as: the monitoring of the cathodic protection level PCCP pipeline) is criterion with the protection potential; the explication of the polarized potential of this protection should be not contain the polarized potential that IR falls; the condition of test is than complicated; these limit and are difficult to operation in practice for a certain reason, and also inconvenient in daily management mission.
Buried PCCP pipeline is that the associating corrosion protection measure of generally all adopting anticorrosive paint to add cathodic protection that increases the service life is controlled.Usually the environmental aspect around the pipeline is comparatively complicated, also has the influence of AC and DC stray current sometimes.In addition, the PCCP pipeline of long distance and the probability that other underground structure is collided are also very high, connect if any metal takes place, and potential test just is a problem; Because PCCP pipe lateral resistance is excessive, adopts sacrificial protection more, can not when measuring, all disconnect usually, make the real cathodic protection potential measurement of pipeline become complicated and difficult more.
At present, the eliminating of employing or reduce the method that IR falls and mainly contain: outage method, test piece outage method, pulse work, polarization probe method, original position reference method (near reference method), soil electric potential gradient technology, alternating current technology etc.As long as conditions permit adopts the outage method can measure the real potential of pipeline, but in practice, limit by the pipeline environmental conditions, the outage method is but often also unsatisfactory.IR during cathodic protection potential is measured falls also and can influence the potential measurement result; fall in order to eliminate IR; best method is the outage method; yet the outage method also is subjected to the restriction of some condition, adopts conventional outage method because the influence of stray current and offset current is difficult to monitor real pipeline cathode protection current potential.
Summary of the invention
Fundamental purpose of the present utility model is to solve the problem that monitoring exists in the above-mentioned buried pipeline, and a kind of cathodic protection monitoring probe and cathodic protection monitoring probe monitoring system are provided.
For the associating corrosion protection measure that generally all adopt anticorrosive paint to add cathodic protection the serviceable life that prolongs buried PCCP pipeline is controlled.Usually the environmental aspect around the pipeline is comparatively complicated, also has the influence of AC and DC stray current sometimes, and real potential how to measure the PCCP pipeline cathode protection under this disturbed condition just seems particularly important.
Expression formula for the ground survey current potential was in the past: P
ON=P
t+ IR; But expression formula has been ignored a non-IR and has been fallen error; Actual expression formula should be:
P
ON?=?P
t?+?ΔP=?P
t?+?IR?+?V
0 (1)
P in the formula
ON---ground energising current potential;
P
t---the true polarized potential of pipeline;
Δ P---measuring point place pipe/earth potential error;
The protection of I---the anticorrosive coat fault location of flowing through or other electric current that can't know;
R---measure the resistance in the loop;
V
0---the non-ohm step-down that formation falls in electric potential gradient in the soil is fallen.
The maximum negative potential that steel pipe is surveyed under the perfect condition should be-1150mV, because surpass-1150mV, evolving hydrogen reaction can take place, and current potential is no longer negative to be moved, and is difficult in the reality measure, and its reason is:
---V
0Value does not disconnect with I and changing, and influences V
0Variable have: the IR that secondary current causes falls, and the position of contrast electrode, soil resistivity, overlayer resistance, measuring point are with respect to position of rectifier etc.
---pipeline soil resistivity inequality along the line causes protective current density difference, its P
tAlso inequality;
---can produce an offset current at tectal fault location behind the cut-out electric current, its gradient will influence test result;
---pipe network is big more, overlayer is inhomogeneous more or the soil of pipeline process different resistivity, and its offset current is big more;
---when stray current, terrestrial current are arranged in the earth or have when disturbing from the electric field beyond the tested pipeline, measured switch-off potential is invalid;
---experience shows that the switch-off potential of pitch pipeline is more satisfactory under the low-resistivity, and high-quality anticorrosive coat time error can reach hundreds of mV under high resistivity.
The protection criterion that the PCCP pipe adopts is a polarized potential; the bad operation of measure field for the PCCP pipe polarized potential that adopts sacrificial protection; by the requirement of new national standard, the switch-off potential that not only will measure probe also will be measured the spontaneous potential of reinforcing bar, and the present invention gets rid of V in test data
0
The purpose of test probe is got rid of V exactly in the cathodic protection potential test data
0Influence is fallen with various IR.
The present invention is a simulation PCCP pipe test probe of judging PCCP tube cathode protection effect, and this probe is with spontaneous potential test, the integrated and one of cathodic protection on/off electric potential test function of PCCP pipe.
The technical scheme that its technical matters that solves the utility model adopts is:
Probe body integral body is tubular, by probe core body, form from corroding electrode, cathode electrode, contrast electrode, surface layer, lead-in wire, electrode through wires hole, negative electrode through wires hole, confining bed, fixed bed, probe core chamber, the reference utmost point and lead cable, probe core body integral body is tubular, the hollow blind hole, hollow hole is probe core chamber.
The top of probe core body is provided with the electrode through wires hole, and the electrode through wires hole runs through the barrel of probe core body, connects with probe core chamber.The bottom of probe core body is provided with the negative electrode through wires hole, and the negative electrode through wires hole runs through the barrel of probe core body, connects with probe core chamber.The probe core is provided with contrast electrode in the chamber, between the barrel of contrast electrode and probe core body fixed bed is set, and contrast electrode is stabilized in the probe core body.
Contrast electrode is placed into the central part of probe body, the central part that contrast electrode is placed on probe body enlarges the installing space of contrast electrode, can select the contrast electrode that stability is high, reliability is high, ensure the measurement accuracy of probe body, improve the serviceable life of contrast electrode.Avoid the contrast electrode solution leakage to the pollution that screed and steel wire may exist, avoided of the influence of cathodic protection electric field to greatest extent potential measurement.
To be wrapped in the probe core body top electrode and be divided into two sections,, be used for measuring the corrosion potential and the cathodic protection potential of steel wire under pre-stressed state respectively promptly from corroding electrode and cathode electrode.Cathode electrode has been simulated the actual condition of electrode, has also simulated actual condition fully from corroding electrode under etch state.Tightly be entangled on the probe core body from corroding electrode, with concrete and mortar for directly to contact, meet PCCP practical structures characteristics, performance is safer.
The top ends of contrast electrode is provided with the reference utmost point, the end of the reference utmost point is connected with an end of lead cable, lead cable is drawn from the port in probe core chamber, contrast electrode is arranged on the serviceable life that ensures the accuracy of test in the probe core chamber of probe body and prolong contrast electrode.
Contrast electrode is the probe body core component; the stability of its electrode potential has determined the stability of measurement result; determined the serviceable life of probe body its serviceable life, selected suitable contrast electrode most important the probe body of PCCP tube cathode protection potential.Copper/copper/saturated copper sulphate electrode with its high electrode potential stability and good anti-polarization performance, becomes preferred contrast electrode.But, copper/copper/saturated copper sulphate electrode is directly installed in the concrete of PCCP pipe probe body, then exist copper-bath to ooze out the pollution concrete, cause the danger of copper to occurring separating out from corroding electrode and cathode electrode; Also exist simultaneously contrast electrode and concrete surface too little, cause and measure the too high measurement that causes influencing current potential of loop resistance, therefore must carry out necessary improvement traditional copper/copper/saturated copper sulphate electrode structure.
Contrast electrode is divided into two chambers up and down, upper chamber is copper/copper/saturated copper sulphate electrode chambers, and lower chambers is the transition chamber of preserving moisture, and connects with the conducting salt bridging between chamber up and down, lower chambers forms with concrete simulation hole liquid and bentonitic clay allotment, seals with electric conduction mortar between the electrode and the external world.Contrast electrode does not directly contact with concrete, but contact with concrete by concrete simulation hole liquid, the reaction of the copper sulfate eletrode that oozes out and strong basicity concrete simulation hole liquid generates the Kocide SD precipitation, the danger that can avoid electrode solution to ooze out polluting the test probe concrete and separate out from corroding electrode and cathode electrode; Simultaneously, contact with extraneous, a moist relatively environment is provided for copper/copper/saturated copper sulphate electrode, help prolonging the serviceable life of contrast electrode by the cavity of preserving moisture; Lower chamber contacts with extraneous by conducting concrete, has enlarged electrode and extraneous concrete surface of contact, has reduced contrast electrode and concrete contact resistance, has improved the accuracy of potential measurement.
The top loop of probe core body outer wall around barrel be provided with the prestress metal wire rod from corroding electrode, at least around 2 circles, fixedly be embedded in from corroding electrode on the outer wall of probe core body, an end that connects lead-in wire from the end of corroding electrode, the other end of lead-in wire passes the electrode through wires hole from the outer wall in probe core chamber, enter in the probe core chamber, the other end from the lead-in wire of corroding electrode is connected with lead cable, and draw from the upper port in probe core chamber, measure the corrosion potential under the pre-stressed state from corroding electrode.
The bottom of probe core body outer wall is provided with the cathode electrode of prestress metal wire rod around barrel; at least around 2 circles; cathode electrode fixedly is embedded on the outer wall of probe core body; the end of cathode electrode connects an end of lead-in wire; the other end of lead-in wire passes the negative electrode through wires hole from the outer wall in probe core chamber; enter in the probe core chamber; the lead-in wire of cathode electrode is drawn to the upper port in probe core chamber along the inwall in probe core chamber; the other end of the lead-in wire of cathode electrode is connected with lead cable; and draw from the upper port in probe core chamber, measure the cathodic protection potential of the cathode electrode under the pre-stressed state.
Electrode on the probe core body outer wall is divided into two parts up and down, is used for measuring corrosion potential and cathodic protection potential under pre-stressed state respectively.Top is for to be used to measure corrosion potential from corroding electrode, and the bottom is that cathode electrode is used to measure cathodic protection potential.Adopt the wire rod of managing identical material with PCCP from corroding electrode with cathode electrode, two arrays of electrodes separately twines, answer uniform winding on the outer wall of probe core body, spacing is 15mm at least, keep constant and closely twine on the probe core body particularly importantly on corroding electrode and cathode electrode, corrosion can not be arranged, can not corrosion in gunite.
Lead-in wire from corroding electrode is connected with the yellow lead of lead cable, the lead-in wire of cathode electrode is connected with the green lead of lead cable, the reference utmost point of contrast electrode is connected with the red lead of lead cable, lead cable is drawn from the port in probe core chamber, and lead cable is connected with the wiring testing cassete.
Being connected with the lead of lead cable respectively by lead-in wire from corroding electrode, cathode electrode and the reference utmost point of probe body, lead cable is drawn from probe body, and lead cable adopts power cable with cross-linked polyethylene insulation (YJV 0.6/1 kV 3 * 2.5mm
2), three core colors are red, yellow, green three looks, wherein red lead is connected with contrast electrode, green lead is connected with cathode electrode, yellow lead be connected from corroding electrode, three cores of lead cable are connected on respectively on three binding posts of wiring testing cassete.
The top in probe core chamber is provided with confining bed, isolated with extraneous being communicated with of top seal in confining bed sealing probe core chamber, confining bed is isolated with extraneous together with sealing from the lead-in wire of corroding electrode, the lead-in wire of cathode electrode, the reference utmost point of contrast electrode and the end of lead cable.
Lead-in wire from corroding electrode, the lead-in wire of cathode electrode, the end that is connected lead-in wire of the lead-in wire of the reference utmost point and lead cable all is arranged in the confining bed, for the lead-in wire that allows from corroding electrode, the lead-in wire of cathode electrode, the end that is connected lead-in wire of the lead-in wire of the reference utmost point and lead cable is isolated from the outside, in confining bed, pour into epoxy resin, lead-in wire from corroding electrode, the lead-in wire of cathode electrode, the reference utmost point of contrast electrode and the end of lead cable wrap, after treating epoxy resin cure, from the lead-in wire of corroding electrode, the lead-in wire of cathode electrode, the reference utmost point of contrast electrode and the end of lead cable and extraneous seal isolation.
The outer setting surface layer of probe core body, surface layer wrap the outer wall of the outer protection of probe core body from corroding electrode, cathode electrode and probe core body.
Fixedly be wrapped on the probe core body from corroding electrode and cathode electrode, on the outer wall of probe core body, surface layer be set, surface layer protection probe core body, from corroding electrode and cathode electrode, surface layer plays guarantee and is not subjected to outside erosion from corroding electrode and cathode electrode.
Contrast electrode is by the contrast electrode tube chamber, electrode chambers, demarcation strip, the conduction salt bridge, preserve moisture chamber and electric conduction mortar back cover formed, contrast electrode integral body is tubular, the contrast electrode tube chamber integral body of contrast electrode is hollow tube-shape, the middle part of contrast electrode tube chamber is provided with demarcation strip, the contrast electrode tube chamber is separated into electrode chambers and the chamber of preserving moisture, the top of contrast electrode tube chamber is electrode chambers, fill copper/saturated copper sulphate solution in the electrode chambers, insert the reference utmost point of fine copper system in the electrode chambers, the reference utmost point is immersed in the copper/saturated copper sulphate solution, the top of the upper end extraction electrode chamber of the reference utmost point.
Analytical pure sulfuric acid copper should fill up as far as possible in upper chamber, adds an amount of distilled water then; The fine copper rod should be immersed in the copper-bath after surface treatment as early as possible, has assembled on electrode top, the current potential that should carry out contrast electrode detects, its electrode potential error answer the control criterion value ± the 5mV scope in, with the potential value fluctuation of batch contrast electrode should be controlled at ± 2mV in.
The bottom of contrast electrode tube chamber is the chamber of preserving moisture, the preserve moisture bottom of chamber is provided with the electric conduction mortar back cover, close the bottom of contrast electrode tube chamber, the electric conduction mortar back cover closely contacts with the bottom in probe core chamber, the potpourri of fill concrete hole liquid and bentonitic clay modulation in the chamber of preserving moisture.
The slip that the electric conduction mortar of lower chambers adopts cement, sand and conductive black to be mixed with, the filling material of bottom chamber adopt the potpourri of concrete pore liquid and bentonitic clay modulation, fill lower chambers.
On electrode chambers and the demarcation strip between the chamber of preserving moisture the conduction salt bridge is set, the two ends of conduction salt bridge are connected with the chamber of preserving moisture with electrode chambers respectively, the conduction salt bridge through electrode chamber and the chamber of preserving moisture, the copper/saturated copper sulphate solution in the electrode chambers is by conducting electricity salt bridge to the chamber transition of preserving moisture.
Probe body is arranged on by the pipeline under the ground surface, the pipeline that pipeline is interconnected to constitute, pipeline every 1km along the line is provided with 1 place probe at least and buries underground a little, every place probe is buried underground 1-2 group probe body a little is set around pipeline at least, probe body parallel burying underground around the pipeline, probe body is apart from pipeline 0.2-0.8m, electric current be flowing in probe body with producing less voltage drop in the soil between the pipeline.
Probe body is placed on by the buried pipe under the ground surface, and no matter how dark piping laying is under ground surface, probe body parallel placement under ground surface all the time with pipeline, probe body does not contact with buried pipe, with the distance of pipeline be 0.2-0.8m.Pipeline and pipeline are connected to form pipeline, along the every 1km of pipeline 1 place probe being set at least according to the designing requirement of pipeline buries underground a little, it is definite according to soil condition under the caliber area of the pipeline of burying underground and the face of land that every place probe is buried the quantity of pipeline placed around probe body a little underground, usually the pipeline of single less caliber is buried 1 probe body at least underground, buries 2 probe body at least underground for pipeline or large diameter pipeline that the single row or multiple rows caliber is bigger.Determine to bury underground the position and the quantity of probe body for the more poor situation of the soil condition around the pipeline under the relatively good situation of the soil condition around the pipeline under the face of land and the face of land in conjunction with the size of caliber, satisfy the requirement of monitoring.Soil condition under the face of land around the pipeline comprises the situation of soil property potential of hydrogen and underground water table etc.
Monitor by probe body, reflect near the body current potential that probe body is.No matter being single, double or the multi coil road, burying underground a little and probe body placement quantity according to condition setting such as designing requirement, project scale and the environment of living in probe of concrete engineering, is principle to satisfy the monitoring requirement.
Probe body, wiring testing cassete, master controller, engineering anode electrode and pipeline electrode constitute cathodic protection monitoring probe monitoring system; wherein the binding post on the wherein set of connections terminal row of an end of the lead cable of one group of probe body and wiring testing cassete is connected, and the red lead of the yellow lead from corroding electrode of an end of lead cable, the green lead of cathode electrode and contrast electrode is connected with binding post on the set of connections terminal row wherein respectively separately.
Binding post on the wherein set of connections terminal row of one end and the wiring testing cassete of the lead cable of another group probe body is connected, and the red lead of the yellow lead from corroding electrode of an end of lead cable, the green lead of cathode electrode and contrast electrode is connected with binding post on the set of connections terminal row wherein respectively separately.
At least the lead cable of 1-2 group probe body is routed in the wiring testing cassete, the red lead of the yellow lead from corroding electrode of lead cable, the green lead of cathode electrode and contrast electrode is routed to respectively on the binding post of a set of connections terminal row wherein, and master controller obtains the numerical information of probe body under the face of land from the binding post in the wiring testing cassete.
The pipeline that buried pipeline is interconnected to constitute; the metal inter-access piece is set between the end of adjacent pipeline and pipeline; the metal inter-access piece is connected pipeline with the end of pipeline; pipeline and pipeline are connected into the pipeline of a continuous conducting by the metal inter-access piece; pipeline is connected to form the pipeline electrode by the binding post on the wherein set of connections terminal row of circuit and wiring testing cassete; the pipeline concentrated expression of conducting goes out the current potential situation; by probe body monitoring potential anomalies situation; distinguish the pipeline cathode protection running situation; detect the current potential of the probe body of diverse location, then reflect the current potential and the current distributions of pipeline relevant position.
The socket joint form that itself is connected between the tube coupling; for improving the electrical connectivity of pipeline; also need adopt metal inter-access piece and jumper cable to be electrically connected; guarantee the continuity of cathodic protection current; improve conduction property between pipeline and the pipeline; the data analysis that monitoring by probe body goes out goes out the situation of whole monitoring pipeline, and the pipeline of conducting can concentrated expression go out whole current potential situation.
Pipeline is other under ground surface buries the engineering anode electrode underground, is connected with the wherein binding post of a set of connections terminal row of wiring testing cassete by circuit, constitutes the binding post of engineering anode electrode.
Pipeline under the face of land is other to be provided with the engineering anode electrode, is connected to by circuit on the binding post of wiring testing cassete, constitutes the binding post of engineering anode electrode, and master controller is implemented monitoring to the engineering anode electrode and obtained data message.
Wiring testing cassete integral body is the box body shape, and 2 row's connecting terminal blocks are set in the wiring testing cassete at least, and 10 binding posts are set on the connecting terminal block at least, between 2 row's connecting terminal blocks switch is set.
Install connecting terminal block in the wiring testing cassete, binding post is set on connecting terminal block, the cathode electrode of probe body, be routed to binding post on the connecting terminal block by lead cable from corroding electrode and contrast electrode, engineering anode electrode and pipeline electrode are routed to respectively on the binding post on the connecting terminal block, implement monitoring by the checkout equipment of master controller.
Wherein the cathode electrode of two groups of probe body that connect on the set of connections terminal row is connected with the binding post of another set of connections terminal row respectively, switch is set, switch open communication line under the even in everyday situations respectively on the circuit that the binding post with another set of connections terminal row is connected.
Wherein the binding post that is connected on the pipeline electrode that connects on the set of connections terminal row and another set of connections terminal row is connected, and on the circuit that the binding post with another set of connections terminal row is connected switch is set, switch open communication line under the even in everyday situations.
The cathode electrode of two groups of probe body is connected with pipeline electrode on another set of connections terminal row respectively on the binding post of another set of connections terminal row, wherein the engineering anode electrode on the set of connections terminal row is connected with pipeline electrode on the set of connections terminal row wherein by circuit, switch is set, switch open communication line under the even in everyday situations on engineering anode electrode and the circuit that the pipeline electrode is connected.
Cathode electrode in the wiring testing cassete, constitute circuit from corroding electrode, contrast electrode, engineering anode electrode and pipeline electrode by circuit and switch, switch is an opening under even in everyday situations, circuit together with.When detecting, make outage test off switch and implement monitoring.
Master controller is provided with checkout equipment and arithmetic facility; the checkout equipment of master controller is provided with outage tester and multimeter; the arithmetic facility of master controller is provided with computing machine or PC single card microcomputer; the checkout equipment of master controller detects according to the binding post on the designing requirement difference butted line testing cassete internal wiring terminal row; the arithmetic facility of master controller writes down, stores, analyzes data message, deal with data information respectively to the detected data message of checkout equipment, and the data message of detection is judged the duty and the security of cathodic protection system through the master controller data processing.
Binding post on the connecting terminal block in the checkout equipment butted line testing cassete of master controller is implemented Monitoring Data information respectively, the arithmetic facility record of master controller, storage, analysis, deal with data information, and print the data message report.
The utility model is cathodic protection monitoring probe and cathodic protection monitoring probe monitoring system.Design science; rational in infrastructure; dependable performance; applied range, stable height, anti-polarizability are strong, the probe steady quality; satisfy the PCCP plumber and made the true protection potential under the state and the needs of self-potential survey; adopting the copper sulphate contrast electrode is reference electrode, has reduced unit conversion, is convenient to the Measurement and Data Processing workload.Contrast electrode is selected traditional copper/saturated copper sulphate contrast electrode for use, and contrast electrode is arranged on the centre of probe, avoided the mutual interference problem of measuring loop and polarization loop to greatest extent, solved the pollution problem that electrode solution may exist, for the stability and the long-life of contrast electrode have been set up a good environment to concrete and steel wire.The result of engineering site test shows; test probe can reflect the cathode protecting state of pipeline compressor wire well, the application of PCCP cathodic protection monitoring probe for the effective enforcement that guarantees PCCP tube cathode resist technology, guarantee that the safe operation of pipeline has important and practical meanings.The in situ detection of pipe corrosion condition can in time be understood the corrosion present situation of commercial unit, the validity of evaluation anticorrosive measure, and industrial practice is had directive function.The present invention is widely used in the pipeline transportation of various fluid foods such as being used for crude oil, rock gas, tap water, city liquefied gas in the fields such as highway, railway, water transport, aviation and industrial or agricultural.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in detail.
The cross-sectional schematic of Fig. 1 cathodic protection monitoring probe
The cross-sectional schematic of the probe core body of Fig. 2 cathodic protection monitoring probe
The synoptic diagram of the probe core body of Fig. 3 cathodic protection monitoring probe
The synoptic diagram of Fig. 4 cathodic protection monitoring probe monitoring system
The synoptic diagram of Fig. 5 cathodic protection monitoring probe monitoring system.
1 probe core body, 2 from corroding electrode, 3 cathode electrodes, 4 contrast electrodes, 5 surface layers, 6 lead-in wires, 7 electrode through wires holes, 8 negative electrode through wires holes, 9 confining beds, 10 fixed beds, 11 contrast electrode tube chambers, 12 electrode chambers, 13 conduction salt bridges, 14 chambers of preserving moisture, 15 electric conduction mortar back covers, 16 wiring testing cassetes, 17 probe body, 18 probe core chambeies, the 19 reference utmost points, 20 engineering anode electrodes, 21 pipelines, 22 metal inter-access pieces, 23 ground surfaces, 24 lead cables, 25 demarcation strips, 26 connecting terminal blocks, 27 binding posts, 28 switches, 29 pipeline electrodes, 30 master controllers.
Embodiment
Probe body (17) integral body is tubular, by probe core body (1), form from corroding electrode (2), cathode electrode (3), contrast electrode (4), surface layer (5), lead-in wire (6), electrode through wires hole (7), negative electrode through wires hole (8), confining bed (9), fixed bed (10), probe core chamber (18), the reference utmost point (19) and lead cable (24), probe core body (1) integral body is tubular, the hollow blind hole, hollow hole is probe core chamber (18).
The top of probe core body (1) is provided with electrode through wires hole (7), and electrode through wires hole (7) runs through the barrel of probe core body (1), connects with probe core chamber (18).The bottom of probe core body (1) is provided with negative electrode through wires hole (8), and negative electrode through wires hole (8) runs through the barrel of probe core body (1), connects with probe core chamber (18).In the probe core chamber (18) contrast electrode (4) is set, between the barrel of contrast electrode (4) and probe core body (1) fixed bed (10) is set, contrast electrode (4) is stabilized in the probe core body (1).
The top ends of contrast electrode (4) is provided with the reference utmost point (19), the end of the reference utmost point (19) is connected with an end of lead cable (24), lead cable (24) is drawn from the port in probe core chamber (18), contrast electrode (4) is arranged on the interior serviceable life that ensures the accuracy of test and prolong contrast electrode (4) of probe core chamber (18) of probe body (17).
The top loop of probe core body (1) outer wall around barrel be provided with the prestress metal wire rod from corroding electrode (2), at least around 2 circles, fixedly be embedded on the outer wall of probe core body (1) from corroding electrode (2), an end that connects lead-in wire (6) from the end of corroding electrode (2), the other end of lead-in wire (6) passes electrode through wires hole (7) from the outer wall in probe core chamber (18), enter in the probe core chamber (18), the other end from the lead-in wire (6) of corroding electrode (2) is connected with lead cable (24), and draw from the upper port in probe core chamber (18), measure the corrosion potential under the pre-stressed state from corroding electrode (2).
The bottom of probe core body (1) outer wall is provided with the cathode electrode (3) of prestress metal wire rod around barrel; at least around 2 circles; cathode electrode (3) fixedly is embedded on the outer wall of probe core body (1); the end of cathode electrode (3) connects an end of lead-in wire (6); the other end of lead-in wire (6) passes negative electrode through wires hole (8) from the outer wall in probe core chamber (18); enter in the probe core chamber (18); the lead-in wire (6) of cathode electrode (3) is drawn to the upper port in probe core chamber (18) along the inwall in probe core chamber (18); the other end of the lead-in wire (6) of cathode electrode (3) is connected with lead cable (24); and draw from the upper port in probe core chamber (18), measure the cathodic protection potential of the cathode electrode (3) under the pre-stressed state.
Lead-in wire (6) from corroding electrode (2) is connected with the yellow lead of lead cable (24), the lead-in wire (6) of cathode electrode (3) is connected with the green lead of lead cable (24), the reference utmost point (19) of contrast electrode (4) is connected with the red lead of lead cable (24), lead cable (24) is drawn from the port in probe core chamber (18), and lead cable (24) is connected with wiring testing cassete (16).
The top in probe core chamber (18) is provided with confining bed (9), what the top seal in confining bed (9) sealing probe core chamber (18) was isolated with extraneous is communicated with, confining bed (9) is isolated with extraneous together with sealing from the lead-in wire (6) of corroding electrode (2), the lead-in wire (6) of cathode electrode (3), the reference utmost point (19) of contrast electrode (4) and the end of lead cable (24).
The outer setting surface layer (5) of probe core body (1), surface layer (5) wrap the outer wall of the outer protection of probe core body (1) from corroding electrode (2), cathode electrode (3) and probe core body (1), as Fig. 1, Fig. 2, shown in Figure 3.
Contrast electrode (4) is by contrast electrode tube chamber (11), electrode chambers (12), demarcation strip (25), conduction salt bridge (13), preserve moisture chamber (14) and electric conduction mortar back cover (15) formed, contrast electrode (4) integral body is tubular, contrast electrode tube chamber (11) integral body of contrast electrode (4) is hollow tube-shape, the middle part of contrast electrode tube chamber (11) is provided with demarcation strip (25), contrast electrode tube chamber (11) is separated into electrode chambers (12) and the chamber of preserving moisture (14), the top of contrast electrode tube chamber (11) is electrode chambers (12), fill copper/saturated copper sulphate solution in the electrode chambers (12), insert the reference utmost point (19) of fine copper system in the electrode chambers (12), the reference utmost point (19) is immersed in the copper/saturated copper sulphate solution, the top of the upper end extraction electrode chamber (12) of the reference utmost point (19).
The bottom of contrast electrode tube chamber (11) is the chamber of preserving moisture (14), the preserve moisture bottom of chamber (14) is provided with electric conduction mortar back cover (15), close the bottom of contrast electrode tube chamber (11), electric conduction mortar back cover (15) closely contacts with the bottom in probe core chamber (18), the potpourri of the chamber of preserving moisture (14) interior fill concrete hole liquid and bentonitic clay modulation.
Conduction salt bridge (13) is set on the demarcation strip (25) between electrode chambers (12) and the chamber of preserving moisture (14), the two ends of conduction salt bridge (13) are connected with the chamber of preserving moisture (14) with electrode chambers (12) respectively, conduction salt bridge (13) through electrode chamber (12) and the chamber of preserving moisture (14), copper/saturated copper sulphate solution in the electrode chambers (12) is by conducting electricity salt bridge (13) to the chamber of preserving moisture (14) transition, as Fig. 1, Fig. 2, shown in Figure 3.
The pipeline (21) that probe body (17) is arranged under the ground surface (23) is other, the pipeline that pipeline (21) is interconnected to constitute, pipeline every 1km along the line is provided with 1 place probe at least and buries underground a little, every place probe is buried underground a little and at pipeline (21) 1 group of probe body (17) is set at least on every side, probe body (17) is buried underground along pipeline (21) is parallel all around, probe body (17) is apart from pipeline (21) 0.2-0.8m, electric current be flowing in probe body (17) with producing less voltage drop in the soil between the pipeline (21), as Fig. 1, shown in Figure 4.
The pipeline (21) that probe body (17) is arranged under the ground surface (23) is other, the pipeline that pipeline (21) is interconnected to constitute, pipeline every 1km along the line is provided with 1 place probe at least and buries underground a little, every place probe is buried underground a little and at pipeline (21) 2 groups of probe body (17) is set at least on every side, probe body (17) is buried underground along pipeline (21) is parallel all around, probe body (17) is apart from pipeline (21) 0.2-0.8m, electric current be flowing in probe body (17) with producing less voltage drop in the soil between the pipeline (21), as Fig. 1, shown in Figure 5.
Probe body (17); wiring testing cassete (16); master controller (30); engineering anode electrode (20) and pipeline electrode (29) constitute cathodic protection monitoring probe monitoring system; wherein the binding post (27) on the wherein set of connections terminal row (26) of an end of the lead cable (24) of one group of probe body (17) and wiring testing cassete (16) is connected the yellow lead from corroding electrode (2) of an end of lead cable (24); the red lead of the green lead of cathode electrode (3) and contrast electrode (4) is connected with binding post (27) on the set of connections terminal row (26) wherein respectively separately.
Binding post (27) on the wherein set of connections terminal row (26) of one end and the wiring testing cassete (16) of the lead cable (24) of another group probe body (17) is connected, and the red lead of the yellow lead from corroding electrode (2) of an end of lead cable (24), the green lead of cathode electrode (3) and contrast electrode (4) is distinguished separately with binding post (27) on the set of connections terminal row (26) wherein and is connected.
The pipeline that buried pipeline (21) is interconnected to constitute; between the end of adjacent pipeline (21) and pipeline (21), metal inter-access piece (22) is set; metal inter-access piece (22) is connected the end of pipeline (21) with pipeline (21); pipeline (21) and pipeline (21) are connected into the pipeline of a continuous conducting by metal inter-access piece (22); pipeline (21) is connected to form pipeline electrode (29) by the binding post (27) on the wherein set of connections terminal row (26) of circuit and wiring testing cassete (16); the pipeline concentrated expression of conducting goes out the current potential situation; by probe body (17) monitoring potential anomalies situation; distinguish pipeline (21) cathodic protection system ruuning situation; detect the current potential of the probe body (17) of diverse location, then reflect the current potential and the current distributions of pipeline (21) relevant position.
Bury engineering anode electrode (20) underground in pipeline (21) side down at ground surface (23), be connected with the wherein binding post (27) of a set of connections terminal row (26) of wiring testing cassete (16) by circuit, constitute the binding post (27) of engineering anode electrode (20).
Wiring testing cassete (16) integral body is the box body shape, and 2 row's connecting terminal blocks (26) are set in the wiring testing cassete (16) at least, and 10 binding posts (27) are set on the connecting terminal block (26) at least, between 2 row's connecting terminal blocks (26) switch (28) is set.
Wherein the cathode electrode (3) of the last two groups of probe body (17) that connect of a set of connections terminal row (26) is connected with the binding post (27) of another set of connections terminal row (26) respectively, with circuit that the binding post (27) of another set of connections terminal row (26) is connected on switch (28) is set respectively, switch under the even in everyday situations (28) is opened communication line.
Wherein the binding post (27) that is connected on the pipeline electrode (29) that go up to connect of a set of connections terminal row (26) and another set of connections terminal row (26) is connected, with circuit that the binding post (27) of another set of connections terminal row (26) is connected on switch (28) is set, switch under the even in everyday situations (28) is opened communication line.
The cathode electrode (3) of the last two groups of probe body of binding post (27) (17) of another set of connections terminal row (26) is connected with pipeline electrode (29) on another set of connections terminal row (26) respectively, wherein the engineering anode electrode (20) on the set of connections terminal row (26) is connected with pipeline electrode (29) on the set of connections terminal row (26) wherein by circuit, on engineering anode electrode (20) and the circuit that pipeline electrode (29) is connected switch (28) is set, switch under the even in everyday situations (28) is opened communication line.
Master controller (30) is provided with checkout equipment and arithmetic facility; the checkout equipment of master controller (30) is provided with outage tester and multimeter; the arithmetic facility of master controller (30) is provided with computing machine or PC single card microcomputer; the checkout equipment of master controller (30) detects according to the binding post (27) on designing requirement difference butted line testing cassete (16) the internal wiring terminal row (26); the arithmetic facility of master controller (30) is to the detected data message of checkout equipment record respectively; storage; analyze data message; deal with data information; the data message that detects is through the duty and the security of master controller (30) data processing judgement cathodic protection system, as Fig. 1; Fig. 4; shown in Figure 5.
Claims (3)
1. cathodic protection monitoring probe, it is characterized in that probe body (17) integral body is tubular, by probe core body (1), form from corroding electrode (2), cathode electrode (3), contrast electrode (4), surface layer (5), lead-in wire (6), electrode through wires hole (7), negative electrode through wires hole (8), confining bed (9), fixed bed (10), probe core chamber (18), the reference utmost point (19) and lead cable (24), probe core body (1) integral body is tubular, the hollow blind hole, hollow hole is probe core chamber (18); The top of probe core body (1) is provided with electrode through wires hole (7), and electrode through wires hole (7) runs through the barrel of probe core body (1), connects with probe core chamber (18); The bottom of probe core body (1) is provided with negative electrode through wires hole (8), and negative electrode through wires hole (8) runs through the barrel of probe core body (1), connects with probe core chamber (18); In the probe core chamber (18) contrast electrode (4) is set, between the barrel of contrast electrode (4) and probe core body (1) fixed bed (10) is set, contrast electrode (4) is stabilized in the probe core body (1); The top ends of contrast electrode (4) is provided with the reference utmost point (19), the end of the reference utmost point (19) is connected with an end of lead cable (24), lead cable (24) is drawn from the port in probe core chamber (18), contrast electrode (4) is arranged on the interior serviceable life that ensures the accuracy of test and prolong contrast electrode (4) of probe core chamber (18) of probe body (17);
The top loop of probe core body (1) outer wall around barrel be provided with the prestress metal wire rod from corroding electrode (2), at least around 2 circles, fixedly be embedded on the outer wall of probe core body (1) from corroding electrode (2), an end that connects lead-in wire (6) from the end of corroding electrode (2), the other end of lead-in wire (6) passes electrode through wires hole (7) from the outer wall in probe core chamber (18), enter in the probe core chamber (18), the other end from the lead-in wire (6) of corroding electrode (2) is connected with lead cable (24), and draw from the upper port in probe core chamber (18), measure the corrosion potential under the pre-stressed state from corroding electrode (2);
The bottom of probe core body (1) outer wall is provided with the cathode electrode (3) of prestress metal wire rod around barrel, at least around 2 circles, cathode electrode (3) fixedly is embedded on the outer wall of probe core body (1), the end of cathode electrode (3) connects an end of lead-in wire (6), the other end of lead-in wire (6) passes negative electrode through wires hole (8) from the outer wall in probe core chamber (18), enter in the probe core chamber (18), the lead-in wire (6) of cathode electrode (3) is drawn to the upper port in probe core chamber (18) along the inwall in probe core chamber (18), the other end of the lead-in wire (6) of cathode electrode (3) is connected with lead cable (24), and draw from the upper port in probe core chamber (18), measure the cathodic protection potential of the cathode electrode (3) under the pre-stressed state;
Lead-in wire (6) from corroding electrode (2) is connected with the yellow lead of lead cable (24), the lead-in wire (6) of cathode electrode (3) is connected with the green lead of lead cable (24), the reference utmost point (19) of contrast electrode (4) is connected with the red lead of lead cable (24), lead cable (24) is drawn from the port in probe core chamber (18), and lead cable (24) is connected with wiring testing cassete (16);
The top in probe core chamber (18) is provided with confining bed (9), what the top seal in confining bed (9) sealing probe core chamber (18) was isolated with extraneous is communicated with, confining bed (9) is isolated with extraneous together with sealing from the lead-in wire (6) of corroding electrode (2), the lead-in wire (6) of cathode electrode (3), the reference utmost point (19) of contrast electrode (4) and the end of lead cable (24); The outer setting surface layer (5) of probe core body (1), surface layer (5) wrap the outer wall of the outer protection of probe core body (1) from corroding electrode (2), cathode electrode (3) and probe core body (1).
2. cathodic protection monitoring probe according to claim 1, it is characterized in that described contrast electrode (4) is by contrast electrode tube chamber (11), electrode chambers (12), demarcation strip (25), conduction salt bridge (13), preserve moisture chamber (14) and electric conduction mortar back cover (15) formed, contrast electrode (4) integral body is tubular, contrast electrode tube chamber (11) integral body of contrast electrode (4) is hollow tube-shape, the middle part of contrast electrode tube chamber (11) is provided with demarcation strip (25), contrast electrode tube chamber (11) is separated into electrode chambers (12) and the chamber of preserving moisture (14), the top of contrast electrode tube chamber (11) is electrode chambers (12), fill copper/saturated copper sulphate solution in the electrode chambers (12), insert the reference utmost point (19) of fine copper system in the electrode chambers (12), the reference utmost point (19) is immersed in copper/copper/saturated copper sulphate solution, the top of the upper end extraction electrode chamber (12) of the reference utmost point (19); The bottom of contrast electrode tube chamber (11) is the chamber of preserving moisture (14), the preserve moisture bottom of chamber (14) is provided with electric conduction mortar back cover (15), close the bottom of contrast electrode tube chamber (11), electric conduction mortar back cover (15) closely contacts with the bottom in probe core chamber (18), the potpourri of the chamber of preserving moisture (14) interior fill concrete hole liquid and bentonitic clay modulation; Conduction salt bridge (13) is set on the demarcation strip (25) between electrode chambers (12) and the chamber of preserving moisture (14), the two ends of conduction salt bridge (13) are connected with the chamber of preserving moisture (14) with electrode chambers (12) respectively, copper/saturated copper sulphate solution in conduction salt bridge (13) through electrode chamber (12) and the chamber of preserving moisture (14), electrode chambers (12) is by conducting electricity salt bridge (13) to the chamber of preserving moisture (14) transition.
3. cathodic protection monitoring probe monitoring system, it is characterized in that, the pipeline (21) that probe body according to claim 1 (17) is arranged under the ground surface (23) is other, the pipeline that pipeline (21) is interconnected to constitute, pipeline every 1km along the line is provided with 1 place probe at least and buries underground a little, every place probe is buried underground a little and at pipeline (21) 1-2 group probe body (17) is set at least on every side, probe body (17) is buried underground along pipeline (21) is parallel all around, probe body (17) is apart from pipeline (21) 0.2-0.8m, electric current be flowing in probe body (17) with producing less voltage drop in the soil between the pipeline (21); Probe body (17), wiring testing cassete (16), master controller (30), engineering anode electrode (20) and pipeline electrode (29) constitute cathodic protection monitoring probe monitoring system, wherein the binding post (27) on the wherein set of connections terminal row (26) of an end of the lead cable (24) of one group of probe body (17) and wiring testing cassete (16) is connected the yellow lead from corroding electrode (2) of an end of lead cable (24), the red lead of the green lead of cathode electrode (3) and contrast electrode (4) is connected with binding post (27) on the set of connections terminal row (26) wherein respectively separately;
Binding post (27) on the wherein set of connections terminal row (26) of one end and the wiring testing cassete (16) of the lead cable (24) of another group probe body (17) is connected, and the red lead of the yellow lead from corroding electrode (2) of an end of lead cable (24), the green lead of cathode electrode (3) and contrast electrode (4) is distinguished separately with binding post (27) on the set of connections terminal row (26) wherein and is connected.
The pipeline that buried pipeline (21) is interconnected to constitute, between the end of adjacent pipeline (21) and pipeline (21), metal inter-access piece (22) is set, metal inter-access piece (22) is connected the end of pipeline (21) with pipeline (21), pipeline (21) and pipeline (21) are connected into the pipeline of a continuous conducting by metal inter-access piece (22), pipeline (21) is connected to form pipeline electrode (29) by the binding post (27) on the wherein set of connections terminal row (26) of circuit and wiring testing cassete (16), the pipeline concentrated expression of conducting goes out the current potential situation, by probe body (17) monitoring potential anomalies situation, distinguish pipeline (21) cathodic protection system ruuning situation, detect the current potential of the probe body (17) of diverse location, then reflect the current potential and the current distributions of pipeline (21) relevant position; Bury engineering anode electrode (20) underground in pipeline (21) side down at ground surface (23), be connected with the wherein binding post (27) of a set of connections terminal row (26) of wiring testing cassete (16) by circuit, constitute the binding post (27) of engineering anode electrode (20);
Wiring testing cassete (16) integral body is the box body shape, and 2 row's connecting terminal blocks (26) are set in the wiring testing cassete (16) at least, and 10 binding posts (27) are set on the connecting terminal block (26) at least, between 2 row's connecting terminal blocks (26) switch (28) is set; Wherein the last cathode electrode (3) that connects probe body (17) of a set of connections terminal row (26) is connected with the binding post (27) of another set of connections terminal row (26), with circuit that the binding post (27) of another set of connections terminal row (26) is connected on switch (28) is set respectively, switch under the even in everyday situations (28) is opened communication line; Wherein the binding post (27) that is connected on the pipeline electrode (29) that go up to connect of a set of connections terminal row (26) and another set of connections terminal row (26) is connected, with circuit that the binding post (27) of another set of connections terminal row (26) is connected on switch (28) is set, switch under the even in everyday situations (28) is opened communication line; The cathode electrode (3) of the last two groups of probe body of binding post (27) (17) of another set of connections terminal row (26) is connected with pipeline electrode (29) on another set of connections terminal row (26) respectively, wherein the engineering anode electrode (20) on the set of connections terminal row (26) is connected with pipeline electrode (29) on the set of connections terminal row (26) wherein by circuit, on engineering anode electrode (20) and the circuit that pipeline electrode (29) is connected switch (28) is set, switch under the even in everyday situations (28) is opened communication line;
Master controller (30) is provided with checkout equipment and arithmetic facility; the checkout equipment of master controller (30) is provided with outage tester and multimeter; the arithmetic facility of master controller (30) is provided with computing machine or PC single card microcomputer; the checkout equipment of master controller (30) detects according to the binding post (27) on designing requirement difference butted line testing cassete (16) the internal wiring terminal row (26); the arithmetic facility of master controller (30) is to the detected data message of checkout equipment record respectively; storage; analyze data message; deal with data information, the data message of detection are judged the duty and the security of cathodic protection system through master controller (30) data processing.
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| CN2010201559975U CN201662525U (en) | 2010-04-12 | 2010-04-12 | Cathode protection monitoring probe and cathode protection monitoring probe monitoring system |
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Cited By (8)
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| CN101857957A (en) * | 2010-04-12 | 2010-10-13 | 天津市水利科学研究院 | Cathodic protection monitoring probe, cathodic protection monitoring probe monitoring system, and manufacturing method and monitoring method thereof |
| CN102424975A (en) * | 2011-12-02 | 2012-04-25 | 中国海洋石油总公司 | Device for acquiring relationship between cathode protection potential on specific part of marine structure and current intensity |
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| CN101857957A (en) * | 2010-04-12 | 2010-10-13 | 天津市水利科学研究院 | Cathodic protection monitoring probe, cathodic protection monitoring probe monitoring system, and manufacturing method and monitoring method thereof |
| CN101857957B (en) * | 2010-04-12 | 2012-08-15 | 天津市水利科学研究院 | Cathodic protection monitoring probe, cathodic protection monitoring probe monitoring system, and manufacturing method and monitoring method thereof |
| CN102818762A (en) * | 2011-06-10 | 2012-12-12 | 中国石油天然气股份有限公司 | Oil gas pipeline polarization potential monitoring devices |
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| CN102912356A (en) * | 2011-08-05 | 2013-02-06 | 北京科技大学 | Multifunctional catholic protection test probe and test method |
| CN102912356B (en) * | 2011-08-05 | 2014-06-04 | 北京科技大学 | Multifunctional catholic protection test probe and test method |
| CN102424975A (en) * | 2011-12-02 | 2012-04-25 | 中国海洋石油总公司 | Device for acquiring relationship between cathode protection potential on specific part of marine structure and current intensity |
| CN104532264A (en) * | 2014-12-24 | 2015-04-22 | 中国石油天然气股份有限公司 | Method and device for evaluating pipeline external damage and cathodic protection effect |
| CN106896299A (en) * | 2015-12-17 | 2017-06-27 | 中国石油天然气股份有限公司 | Method for testing insulating property of pipeline insulating device |
| CN106596387A (en) * | 2016-12-07 | 2017-04-26 | 中国特种飞行器研究所 | Corrosion rate on-line monitoring sensing probe of airplane metal matrix structure |
| CN112281165A (en) * | 2020-11-30 | 2021-01-29 | 广东腐蚀科学与技术创新研究院 | Multifunctional polarization probe for cathodic protection oil and gas pipeline and use method thereof |
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