Underwater equipment corrosion potential data detection systemTechnical field
The utility model relates to the outer surfaces of a kind of data detection system, in particular to a kind of pair of underwater equipment to corrodeThe system of potential data detection, belongs to the technical field of underwater equipment monitoring.
Background technique
It is well known that seawater is a kind of electrolyte solution.Various underwater equipments made of metal soak in the seawater for a long timeBubble, easily formation corrosion potential, to cause corrosion and the underwater equipment structure function of the metal material of underwater equipment outer surfaceThe damage of energy.Wherein, the corrosion potential refers to, when not having impressed current, when metal reaches a stable etch stateThe current potential measured.
The corrosion potential of underwater equipment is wet corrosion current potential, and principle is electrochemical reaction, i.e., forms one in metal surfaceThe corrosion potential battery of a anode region and cathodic region isolation, metal lose electronics in the seawater, become positively charged ion, this isOne oxidation process, that is, anodic process.At the same time in the metal surface of contact seawater, electronics has a large amount of chances by seawaterCation neutralizes, and the process for neutralizing electronics is reduction process, i.e. cathodic process.
Underwater equipment realizes anticorrosion usually using spelter.Since corrosion potential is more readily formed than steel in spelter,Current underwater equipment generallys use the cathode protection method of sacrificial anode, loads spelter by the surface of equipment under water to protectUnderwater equipment itself.
But due to the complex situations of ocean underwater environment, still lacks in this way and practical corrosion condition is carried outRapidly, direct monitoring means.That is, discovering in time not yet if spelter has been damaged by corrosion totally, under waterEquipment will face the danger for the damage that is corroded, and eventually lead to the generation of industrial accident.
Based on above-mentioned, the utility model proposes a kind of underwater equipment corrosion potential data detection systems, are able to achieve to underwaterThe real-time detection of the corrosion potential data of equipment, the timely early warning before potential corrosion influences underwater equipment functional completeness,To effectively solve disadvantage existing in the prior art and limitation.
Utility model content
The purpose of the utility model is to provide a kind of underwater equipment corrosion potential data detection systems, in real time to underwater equipmentCorrosion potential data detected, the timely early warning before potential corrosion influences underwater equipment functional completeness avoids sending outRaw safety accident.
In order to achieve the above object, the utility model proposes a kind of underwater equipment corrosion potential data detection system, include:At least one reference electrode is fixed at the monitoring position for needing to carry out potential corrosion monitoring on the metal of underwater equipment outer surfaceUnderwater equipment outer surface metal at place, the reference electrode and monitoring position forms measurement battery；Pressure measuring instrument, respectively with ginsengThan the underwater equipment outer surface metal at electrode and monitoring position by circuit connection, the electrode electricity of the measurement battery is measuredGesture；Data control block receives the electromotive force of measurement battery with pressure measuring instrument by circuit connection, judge whether in advanceThere are differences between the reference electromotive force of setting, and export pre-warning signal to remote control center.
The reference electrode is mounted on the oil and gas pipeline, and/or electronic instrument, and/or control valve of underwater equipmentOn the outer surface metal of door.
Underwater equipment corrosion potential data detection system described in the utility model also includes power-supply battery, surveys with voltageInstrument connection is measured, provides reference electromotive force for reference electrode.
The data control block includes: data converter, with pressure measuring instrument by circuit connection, by voltage measurementThe measurement cell emf of instrument output is converted to analog output；Controller, respectively and in data converter and long-range controlThe heart is by circuit connection, by the analog quantity of the measurement cell emf of data converter output and pre-set reference electromotive forceAnalog quantity is compared, and judges whether difference between the two is equal to 0, such as otherwise exports pre-warning signal to remote control center.
The reference electromotive force of the reference electrode is converted to reference electromotive force analog quantity by data converter.
Underwater equipment corrosion potential data detection system described in the utility model also includes alarm, controls with dataThe controller of module connects, and sounds an alarm when receiving pre-warning signal.
Underwater equipment corrosion potential data detection system described in the utility model also includes waterproof pressure shell, describedData control block, pressure measuring instrument and power-supply battery be fixed at the inside of the waterproof pressure shell.
The waterproof pressure shell is made of anticorrosion material, and pressure-bearing range is in 1500Psi or more.
Between the pressure measuring instrument and reference electrode, connected using waterproof pressure conducting wire；The pressure measuring instrumentBetween the underwater equipment outer surface metal at monitoring position, connected using waterproof pressure conducting wire.
It, can be in real time to setting under water in conclusion underwater equipment corrosion potential data detection system described in the utility modelStandby corrosion potential data are detected, the timely early warning before potential corrosion influences underwater equipment functional completeness, to keep awayExempt from safety accident caused by occurring because of potential corrosion.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the underwater equipment corrosion potential data detection system in the utility model.
Specific embodiment
Below in conjunction with Fig. 1, by preferred embodiment to the technology contents of the utility model, construction feature, reached purposeAnd effect is described in detail.
As shown in Figure 1, being underwater equipment corrosion potential data detection system provided by the utility model, include: at least oneA reference electrode 3 is fixed at the monitoring position for needing to carry out potential corrosion monitoring on the metal of underwater equipment outer surface, shouldUnderwater equipment outer surface metal at reference electrode 3 and monitoring position forms measurement battery；Pressure measuring instrument 2, respectively with referenceUnderwater equipment outer surface metal at electrode 3 and monitoring position measures the electrode potential of the measurement battery by circuit connection；Data control block 1 receives the electromotive force of measurement battery, judges whether and set in advance with pressure measuring instrument 2 by circuit connectionThere are differences between the reference electromotive force set, and export pre-warning signal to remote control center.
In the preferred embodiment of the utility model, for underwater equipment, some important and perishable position isNecessary real-time perfoming potential corrosion monitoring, specifically include oil transportation or gas pipeline, electronic instrument and control valve etc..AlsoIt is to say, the reference electrode 3 in the utility model is optionally separately mounted to oil transportation or the gas pipeline, electronics of underwater equipmentOn instrument and the outer surface metal of control valve, multiple monitoring positions are formed, while monitoring the potential corrosion at these positionsSituation.
Underwater equipment corrosion potential data detection system described in the utility model also includes power-supply battery 7, surveys with voltageIt measures instrument 2 to connect, provides stable 220V reference electromotive force for reference electrode 3, service life is generally at 10 years or more.
The data control block 1 includes: data converter, and with pressure measuring instrument 2 by circuit connection, voltage is surveyedThe electromotive force that amount instrument 2 measures obtained measurement battery is converted to 4~20mA analog output；Controller, respectively with data conversionDevice and remote control center are by circuit connection, by 4~20mA mould of the electromotive force of the measurement battery of data converter outputAnalog quantity is compared with pre-set reference electromotive force analog quantity, judges whether difference between the two is equal to 0, such as otherwise defeatedPre-warning signal is to remote control center out.
Wherein, after the 220V reference electromotive force of reference electrode 3 being converted to 4~20mA analog quantity by data converter,Obtain reference electromotive force analog quantity.
In the preferred embodiment of the utility model, the controller is realized using RAW NAND control chip, toolThere is the RAM module for loading control program, the operation program that data processing is carried out to 4~20mA analog quantity, and tool can be providedThere is the ROM module of storing data, can store and record 4~20mA analog quantity of data converter output, and storage is in advanceThe reference electromotive force analog quantity of setting.
Underwater equipment corrosion potential data detection system described in the utility model also includes alarm 6, controls with dataThe controller of module 1 connects, and when receiving pre-warning signal, sounds an alarm to other underwater equipments around.
Further, underwater equipment corrosion potential data detection system described in the utility model, also comprising outside waterproof pressureShell 4, the data control block 1, pressure measuring instrument 2 and power-supply battery 7 are fixed at the interior of the waterproof pressure shell 4Portion.
The waterproof pressure shell 4 is made of anticorrosion material, and pressure-bearing range is at 1500Psi (ft lbf/square inch)More than, favorable sealing property.
In the preferred embodiment of the utility model, the waterproof pressure shell 4 is according to the internal electronic component installedSize be formed into cylindrical shape, diameter 200mm, length 500mm, and be provided on its inner wall for fix electronics memberThe groove of part and electronic circuit.
Between the pressure measuring instrument 2 and reference electrode 3, connected using waterproof pressure conducting wire；The voltage measurementBetween underwater equipment outer surface metal at instrument 2 and monitoring position, (not shown) is also connected using waterproof pressure conducting wire, with trueProtect the circuit safety and reliability of whole system.
The reference electrode is when measuring various electrode electromotive force as referring to the electrode compared.By tested fixed electrodeReference cell is constituted with the reference electrode of accurately known electrode electromotive force numerical value, by measuring the electromotive force of reference cell, thusThe electromotive force of tested fixed electrode can be calculated.
Therefore in the present invention, being tested fixed electrode is the underwater equipment outer surface metal monitored at position, withReference electrode 3 formed reference cell, by pressure measuring instrument 2 measure reference cell electromotive force, and due to reference electrode 3 byPower-supply battery 7 provides precise and stable electromotive force for it, is calculated by the difference of the two, can obtain (the monitoring of tested fixed electrodeUnderwater equipment outer surface metal at position) electromotive force.And once find that the electromotive force of the underwater equipment outer surface metal isWhen non-zero, then illustrate that there are corrosion potentials at the monitoring position, realize processing in time by timely early warning, it otherwise will be to underwaterEquipment causes further to damage and influence.
It, can be in real time to setting under water in conclusion underwater equipment corrosion potential data detection system described in the utility modelStandby corrosion potential data are detected, the timely early warning before potential corrosion influences underwater equipment functional completeness, to keep awayExempt from safety accident caused by occurring because of potential corrosion.
It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that onThe description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, forA variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appendedClaim limit.