CN113337825A - Monitoring of marine desilting environment sacrificial anode service performance and failure risk early warning system - Google Patents
Monitoring of marine desilting environment sacrificial anode service performance and failure risk early warning system Download PDFInfo
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- CN113337825A CN113337825A CN202110496510.2A CN202110496510A CN113337825A CN 113337825 A CN113337825 A CN 113337825A CN 202110496510 A CN202110496510 A CN 202110496510A CN 113337825 A CN113337825 A CN 113337825A
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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
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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
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Abstract
The invention discloses a sacrificial anode service performance monitoring and failure risk early warning system for an ocean desilting environment, which comprises a sensor subsystem, a data acquisition subsystem, a data storage and transmission subsystem and a power module, wherein the sensor subsystem is used for acquiring a working state of a sacrificial anode; the sensor subsystem includes N sensor groups, every sensor group is including setting up the couple sensor in the protection box, protection current sensor, corrosion sensor, environmental parameter sensor, N sensor group fixes on the protecting wire pipe, the protecting wire pipe passes through the leg welding and is on being protected the steel construction, the wire of each sensor group leads to in the protecting wire pipe and upwards draws out along the protecting wire pipe and inserts the data acquisition subsystem, the data acquisition subsystem is connected with data storage transmission subsystem, data storage transmission subsystem passes through wireless or wired mode and connects the surveillance center. The method is used for monitoring the service performance and the environmental parameters of the sacrificial anode, and pre-warning the failure risk of the sacrificial anode, so as to guarantee the service effect and the service life of the cathode protection.
Description
Technical Field
The invention belongs to the technical field of cathodic protection, and particularly relates to a sacrificial anode service performance monitoring and failure risk early warning system for an ocean desilting environment.
Background
The aluminum alloy sacrificial anode has excellent performance and can be widely applied to the cathodic protection of the steel structure in the marine environment. When the aluminum alloy sacrificial anode is used in a desilting marine environment (such as a desilting port, a desilting cross-sea bridge and the like), the sea mud surface is gradually raised by the desilting, and the sacrificial anode originally used in seawater is often covered by the sea mud and is used in a passive sea mud environment. When the submarine steel shell immersed tube tunnel, submarine pipeline and the like are laid, the submarine needs to be excavated and backfilled, sea mud is gradually backfilled to cover the tunnel, the pipeline and the like, and the preassembled aluminum alloy sacrificial anode is also in service in a sea mud environment.
When the aluminum alloy sacrificial anode is used in a sea mud environment, the performance of the anode is reduced compared with the performance of the aluminum alloy sacrificial anode used in a seawater environment even if the aluminum alloy sacrificial anode is used in a sea mud environment. Meanwhile, when the aluminum alloy sacrificial anode is in service in a sea mud environment, the service performance can be changed along with the properties of the sea mud, the temperature and the service time, and the risk of passivation failure exists. In a silted-back environment, the properties of the sea mud will vary with the fouling time, and generally the longer the fouling time or the lower the layer of sea mud is, the more detrimental the sacrificial anode performance is. In addition, since the sea mud belongs to an anoxic environment, the propagation of anaerobic bacteria (such as sulfate reducing bacteria) can be promoted, so that microbial corrosion is caused, and steel corrosion in the sea mud environment is accelerated. Therefore, it is necessary to grasp the service performance of the sacrificial anode in time and to perform early warning on failure risk so as to take treatment measures in time and ensure the service effect and the service life of the cathode protection.
However, after the sacrificial anode is covered by the sea mud, the traditional diving detection can be implemented after excavation, so that the workload is large, the time and the labor are consumed, and the method is difficult to realize at the part with larger installation depth or thicker sea mud coverage. Meanwhile, the diving detection has discontinuity in time, and failure risk early warning is easy to cause. The sacrificial anode and the monitoring technology of the protection effect thereof mainly monitor the current generated by the sacrificial anode or the protection potential of a steel structure (such as the technical schemes disclosed in the Chinese patents CN100585010C and CN 211284550U), cannot reflect the change of the environmental parameters of the sacrificial anode, and are difficult to realize the early warning of the failure risk of the sacrificial anode in the back-silting environment.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a sacrificial anode service performance monitoring and failure risk early warning system for a marine desilting environment. The system is used for monitoring the service performance and the environmental parameters of the sacrificial anode and early warning the failure risk of the sacrificial anode so as to take treatment measures in time and guarantee the service effect and the service life of cathode protection.
The invention is realized by the following technical scheme:
a sacrificial anode service performance monitoring and failure risk early warning system for an ocean desilting environment comprises a sensor subsystem, a data acquisition subsystem, a data storage and transmission subsystem and a power module;
the sensor subsystem comprises N sensor groups, wherein N is more than or equal to 1, each sensor group comprises a couple pair sensor, a protection current sensor, a corrosion sensor and an environmental parameter sensor which are arranged in a protection box, and epoxy resin is cast among the 4 sensors to form an insulating isolation layer for isolation and form a whole; the couple sensor comprises a sacrificial anode probe, a protected electrode and a first reference electrode, wherein the sacrificial anode probe is square, the protected electrode is square, the sacrificial anode probe is positioned at the center of the square protected electrode, the sacrificial anode probe and the protected electrode are cast into an insulating isolation layer by epoxy resin for isolation, and the first reference electrode is arranged in the insulating isolation layer; the protection current sensor comprises a current collection probe, a second reference electrode and an electric connection point, wherein the current collection probe is annular, the second reference electrode is arranged at the center of the current collection probe and is isolated by an insulating isolation layer which is cast by epoxy resin, the current collection probe is connected with the electric connection point by a lead, a sampling resistor is connected between the current collection probe and the electric connection point in series, and the electric connection point is welded with a protected steel structure; the corrosion sensor comprises a corrosion-resistant counter electrode, a steel electrode, a sacrificial anode working electrode and a third reference electrode, wherein the steel electrode and the sacrificial anode working electrode are symmetrically distributed on two sides of the third reference electrode and are respectively sleeved in 3 mounting openings of the corrosion-resistant counter electrode, which are arranged in a layout mode, epoxy resin is cast in a gap part, and an insulating isolation layer is formed for isolation; the environment parameter sensor comprises a resistivity probe, a temperature probe, an oxidation-reduction potential electrode, a dissolved oxygen electrode, a pH electrode, a chlorine ion electrode and a sulfur ion electrode, wherein the probes and the electrodes of the environment parameter sensor are arranged at intervals according to the layout and are cast by epoxy resin to form an insulating isolation layer for isolation;
the N sensor groups are fixed on a wire protection pipe, the wire protection pipe is welded on a protected steel structure through welding feet, leads of the sensor groups are led into the wire protection pipe through respective protection boxes and led out upwards along the wire protection pipe, the led leads are connected into a data acquisition subsystem, the data acquisition subsystem is connected with a data storage and transmission subsystem, and the data storage and transmission subsystem is connected with a monitoring center in a wireless or wired mode; the power supply module is connected with the data acquisition module and the data storage and transmission subsystem and supplies power to the data acquisition module and the data storage and transmission subsystem;
the data acquisition subsystem periodically sends an acquisition instruction to the sensor subsystem, acquires response data, transmits the data to the monitoring center through the communication module, and then realizes online monitoring, evaluation and failure risk early warning of the service performance of the sacrificial anode in the marine back-silting environment through monitoring center software.
In the technical scheme, the data acquisition subsystem, the data storage and transmission subsystem and the power supply module are arranged in the instrument and equipment box.
In the technical scheme, the data acquisition subsystem comprises a current acquisition module, a voltage acquisition module, an electrochemical test module and an environmental parameter acquisition module;
the lead wires led out from the sacrificial anode and the protected electrode in the galvanic couple sensor of the sensor group are connected with the current acquisition module of the data acquisition subsystem and used for acquiring galvanic couple current between the sacrificial anode and the protected electrode; the lead wires led out of the anode probe, the protected electrode and the first reference electrode are also connected with a voltage acquisition module of the data acquisition subsystem and used for monitoring the working potential of the sacrificial anode and the protection potential of the protected electrode;
the wire led out from the signal output end of the sampling resistor in the protection current sensor of the sensor group is connected with the voltage acquisition module of the data acquisition subsystem, because the resistance of the sampling resistor is known, the protection current between the protected steel structure and the current collecting probe can be obtained by dividing the voltage between the signal output ends of the sampling resistor by the resistance, and because the surface area of the current collecting probe is known, the protection current density can be obtained by dividing the surface area by the protection current; the current collecting probe in the protective current sensor of the sensor group and a lead led out from the second reference electrode are also connected with a voltage acquisition module of the data acquisition subsystem and used for monitoring the protective potential of the current collecting probe;
a sacrificial anode working electrode, a third reference electrode and an anti-corrosion counter electrode in a corrosion sensor of the sensor group form a three-electrode system, and leads led out of the three electrodes are connected with an electrochemical test module of a data acquisition subsystem and used for monitoring data such as sacrificial anode corrosion rate, sacrificial anode corrosion potential and the like; the steel electrode, the third reference electrode and the corrosion-resistant counter electrode form a three-electrode system, and leads led out of the three electrodes are connected with an electrochemical test module of the data acquisition subsystem and used for monitoring data such as steel corrosion rate, steel corrosion potential and the like;
and wires led out from the resistivity probe, the temperature probe, the oxidation-reduction potential electrode, the dissolved oxygen electrode, the pH electrode, the chloride ion electrode and the sulfur ion electrode in the environmental parameter sensor of the sensor group are connected with an environmental parameter acquisition module of the data acquisition subsystem and are used for monitoring the resistivity, the temperature, the oxidation-reduction potential, the dissolved oxygen content, the pH value, the chloride ion concentration and the sulfur ion concentration data of the sea mud or the seawater.
In the technical scheme, the power supply module comprises a power supply, an anti-surge switch, a voltage stabilizer, a power supply management module and a battery pack, wherein the power supply is connected with the anti-surge switch, the anti-surge switch is connected with the voltage stabilizer, the voltage stabilizer is connected with the power supply management module, the power supply management module is connected with the battery pack, and the power supply management module is connected with the wiring module and is connected with the data acquisition subsystem and the data storage and transmission subsystem.
In the above technical solution, the data storage and transmission subsystem includes a data storage module and a communication module, and the data storage module is used for storing various data collected by the data collection subsystem; the communication module is used for realizing wired or wireless communication and transmitting various data acquired by the acquisition subsystem.
In the technical scheme, the material of the corrosion-resistant counter electrode is a corrosion-resistant material such as seawater-resistant stainless steel, a platinum-plated titanium electrode, a platinum electrode and the like.
In the technical scheme, the material of the collecting probe is the same as that of the protected steel structure.
In the above technical solution, the first reference electrode, the second reference electrode and the third reference electrode may be a silver/silver chloride reference electrode, a high purity zinc reference electrode, a copper/copper sulfate electrode, a solid silver halide reference electrode, or the like.
In the above technical solution, the insulating isolation layer may be made of polymer materials such as epoxy resin, nylon, and the like.
The invention has the advantages and beneficial effects that:
(1) the method can realize the on-line monitoring of the service performance of the sacrificial anode, the environmental parameters and the condition of the protected steel structure, and can early warn the failure risk of the sacrificial anode according to the monitoring result so as to take treatment measures in time, delay or inhibit the failure risk of the sacrificial anode, thereby having positive significance for guaranteeing the cathodic protection effect and the age limit.
(2) The invention has comprehensive monitoring parameters, can realize galvanic couple current, protected electrode protection potential, protection current density, current collection probe protection potential, sacrificial anode corrosion rate, steel corrosion potential, resistivity, temperature, oxidation-reduction potential, dissolved oxygen content, pH value, chloride ion concentration, sulfur ion concentration and other data, and can obtain a sacrificial anode failure risk critical value through comprehensive analysis and processing of the monitoring data for judging whether the sacrificial anode fails.
(3) In the initial stage of burying the sacrificial anode in sea mud, the sea mud property change is not enough to make the sacrificial anode fail, and premature treatment measures cause additional cost. The invention can effectively judge whether the sacrificial anode is invalid or not through monitoring data, realize the starting early warning in reasonable time and take treatment measures, avoid the extra cost caused by the early treatment, and ensure the service effect and the service life of the steel structure cathode protection under the condition of economy and applicability.
(4) The invention has simple and convenient processing and production, convenient implementation and simple operation, is suitable for standardized production and large-scale use, has wide application range, and can be used for basic facilities or equipment with aluminum alloy sacrificial anodes serving in a sea mud environment, such as ports in siltation areas, sea-crossing bridges, offshore wind power foundations, and submarine steel shell tunnels, submarine pipelines and the like which need to be excavated and backfilled.
(5) The method has strong applicability, is particularly suitable for monitoring the service performance of the aluminum alloy sacrificial anode and early warning of failure risk in the ocean desilting environment, and can also be used for monitoring the service performance of the magnesium alloy, the aluminum alloy, the zinc alloy and other sacrificial anodes in water bodies such as seawater, river water, salt lake water and the like, and monitoring the service performance of the aluminum alloy sacrificial anode in the water body silt and early warning of failure risk.
Drawings
FIG. 1 is a schematic diagram of a sacrificial anode service performance monitoring and failure risk early warning system in an ocean desilting environment. In fig. 1, a is a sensor subsystem, B is a data acquisition subsystem, C is a data storage transmission subsystem, D is a monitoring center, 1 is a sensor group, 2 is a protection box, 3 is a current acquisition module, 4 is a voltage acquisition module, 5 is an electrochemical test module, 6 is an environmental parameter acquisition module, 7 is a power module, 8 is a wiring module, 9 is a data storage module, 10 is a communication module, and 11 is an instrument and equipment box.
FIG. 2 is a schematic diagram of a sensor group of the sacrificial anode service performance monitoring and failure risk early warning system in the ocean desilting environment. In fig. 2, a is a galvanic couple sensor, b is a protection current sensor, c is a corrosion sensor, d is an environmental parameter sensor, 2 is a protection box, 12 is a sacrificial anode probe, 13 is a protected electrode, 14 is an insulating isolation layer, 15 is a reference electrode, 16 is a current collecting probe, 17 is an electrical connection point, 18 is a corrosion-resistant counter electrode, 19 is a steel electrode, 20 is a sacrificial anode working electrode, 21 is a resistivity probe, 22 is a temperature probe, 23 is an oxidation-reduction potential electrode, 24 is a dissolved oxygen electrode, 25 is a pH electrode, 26 is a chloride ion electrode, 27 is a sulfur ion electrode, and 39 is a sampling resistor.
FIG. 3 is an installation schematic diagram of a sensor group of the marine back-silting environment sacrificial anode service performance monitoring and failure risk early warning system. In fig. 3, 29 denotes a protected steel structure, 30 denotes a sacrificial anode of the protected steel structure, 31 denotes a guard pipe, 32 denotes a lead wire, and 33 denotes a fillet.
FIG. 4 is a schematic diagram of a power module of the system for monitoring service performance of a sacrificial anode and early warning failure risk in an ocean desilting environment. In fig. 4, 8 is a connection module, 34 is a power supply, 35 is an anti-surge switch, 36 is a voltage regulator, 37 is a power management module, and 38 is a battery pack.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Example one
Referring to fig. 1, a schematic diagram of a sacrificial anode service performance monitoring and failure risk early warning system for an ocean desilting environment is shown, which includes a sensor subsystem a, a data acquisition subsystem B, a data storage and transmission subsystem C, and a monitoring center D.
The sensor subsystem A comprises a single or a plurality of sensor groups 1, the data acquisition subsystem B comprises a current acquisition module 3, a voltage acquisition module 4, an electrochemical test module 5 and an environmental parameter acquisition module 6, and the data storage and transmission subsystem C comprises a data storage module 9 and a communication module 10; the sensor subsystem A is connected with the data acquisition subsystem B, the data acquisition subsystem B is connected with the data storage and transmission subsystem C, the power module 7 is connected with the data acquisition subsystem B and the data storage and transmission subsystem C, and the data storage and transmission subsystem C is connected with the monitoring center D in a wireless or wired mode through the wiring module 8; the data acquisition subsystem B, the data storage and transmission subsystem C, the power module 7, the wiring module 8 and the like are arranged in the instrument and equipment box 11.
The sensor group 1 and its mounting structure and the structure of the power module 7 will be described below with reference to specific embodiments.
Referring to fig. 2, a schematic structural diagram of a single sensor group 1 is shown, which comprises a galvanic couple sensor a, a protection current sensor b, a corrosion sensor c, and an environmental parameter sensor d arranged in a protection box 2, and 4 sensors are cast with epoxy resin to form an insulating isolation layer 14 for isolation and integration.
The couple sensor a comprises a sacrificial anode probe 12, a protected electrode 13 and a first reference electrode 15-1, wherein the sacrificial anode probe 12 is square, the protected electrode 13 is square, the sacrificial anode probe 12 is located at the center of the square protected electrode 13, the sacrificial anode probe 12 and the square protected electrode 13 are isolated by an insulating isolation layer 14-1 which is formed by casting epoxy resin, the first reference electrode 15-1 is arranged in the insulating isolation layer 14-1, and the sacrificial anode probe 12, the protected electrode 13 and the first reference electrode 15-1 are all connected with a lead and led out.
The protection current sensor b comprises a current collecting probe 16, a second reference electrode 15-2 and an electric connection point 17, wherein the current collecting probe 16 is annular, the second reference electrode 15-2 is arranged at the center of the current collecting probe 16 and is isolated by an insulating isolation layer 14-2 which is cast by epoxy resin, the current collecting probe 16 is connected with the electric connection point 17 by a lead, a sampling resistor 39 is connected between the current collecting probe and the electric connection point in series, the electric connection point 17 is welded with a protected steel structure, and the signal output end of the sampling resistor 39, the current collecting probe 16 and the second reference electrode 15-2 are all connected with the lead and led out.
The corrosion sensor c comprises a corrosion-resistant counter electrode 18, a steel electrode 19, a sacrificial anode working electrode 20 and a third reference electrode 15-3, wherein the steel electrode 19 and the sacrificial anode working electrode 20 are symmetrically distributed on two sides of the third reference electrode 15-3 and are respectively sleeved in 3 mounting openings of the corrosion-resistant counter electrode 18 according to the layout, epoxy resin is cast in a gap part to form an insulating isolation layer 14-3 for isolation, and the corrosion-resistant counter electrode 18, the steel electrode 19, the sacrificial anode working electrode 20 and the third reference electrode 15-3 are all connected with and led out through wires.
The environment parameter sensor d comprises a resistivity probe 21, a temperature probe 22, an oxidation-reduction potential electrode 23, a dissolved oxygen electrode 24, a pH electrode 25, a chloride ion electrode 26 and a sulfur ion electrode 27, wherein the probes and the electrodes are arranged at intervals according to the layout and are cast by epoxy resin to form an insulating isolation layer 14-4 for isolation, the resistivity probe 21 adopts 316L stainless steel electrodes which are linearly arranged at equal intervals, and all the electrodes and the probes of the environment parameter sensor d are connected with leads and led out.
Referring to fig. 3, which is a schematic diagram of the installation of the sensor groups, each sensor group 1 is fixed on the conduit 31 by a clamp, and when a plurality of sensor groups 1 are arranged on the conduit 31, the sensor groups are arranged at equal intervals along the length direction of the conduit 31; the position of the guard pipe 31 is set, the sensor group at the uppermost layer is arranged at a proper position away from the sacrificial anode at the lowermost layer, the guard pipe 31 is welded on the protected steel structure 29 through a welding foot 33, the lead of each sensor group is led into the guard pipe 31 through the respective protection box and led upwards along the guard pipe 31, and the led lead 32 is connected into the data acquisition subsystem B. Specifically speaking:
a lead led out by a sacrificial anode 12 and a protected electrode 13 in a couple pair sensor a of the sensor group is connected with a current acquisition module 3 of the data acquisition subsystem and is used for acquiring couple current between the sacrificial anode and the protected electrode; the anode probe 12, the protected electrode 13 and the first reference electrode 15-1 are also connected with a voltage acquisition module 4 of the data acquisition subsystem for monitoring the working potential of the sacrificial anode and the protection potential of the protected electrode.
The lead led out from the signal output end of the sampling resistor 39 in the protection current sensor b of the sensor group is connected with the voltage acquisition module 4 of the data acquisition subsystem, because the resistance of the sampling resistor 39 is known, the voltage between the signal output ends of the sampling resistor 39 is divided by the resistance, so that the protection current between the protected steel structure and the current collecting probe can be obtained, and because the surface area of the current collecting probe is known, the protection current is divided by the surface area, so that the protection current density can be obtained; and the current collecting probe 16 in the protective current sensor b of the sensor group and a lead led out from the second reference electrode 15-2 are also connected with a voltage acquisition module 4 of the data acquisition subsystem for monitoring the protective potential of the current collecting probe.
A sacrificial anode working electrode 20, a third reference electrode 15-3 and a corrosion-resistant counter electrode 18 in a corrosion sensor c of the sensor group form a three-electrode system, and leads led out of the three are connected with an electrochemical test module 5 of a data acquisition subsystem and used for monitoring data such as sacrificial anode corrosion rate, sacrificial anode corrosion potential and the like; the steel electrode 19, the third reference electrode 15-3 and the corrosion-resistant counter electrode 18 form a three-electrode system, and leads led out of the three electrodes are connected with the electrochemical test module 5 of the data acquisition subsystem and used for monitoring data such as the corrosion rate of the steel, the corrosion potential of the steel and the like.
Wires led out from a resistivity probe 21, a temperature probe 22, an oxidation-reduction potential electrode 23, a dissolved oxygen electrode 24, a pH electrode 25, a chloride ion electrode 26 and a sulfur ion electrode 27 in an environmental parameter sensor d of the sensor group are connected with an environmental parameter acquisition module 6 of the data acquisition subsystem and are used for monitoring data such as resistivity, temperature, oxidation-reduction potential, dissolved oxygen content, pH value, chloride ion concentration, sulfur ion concentration and the like of sea mud or seawater.
Referring to fig. 4, the schematic diagram of the power module 7 is shown, and the power module includes a power source 34, an anti-surge switch 35, a voltage stabilizer 36, a power management module 37, and a battery pack 38, where the power source 34 is connected to the anti-surge switch 35, the anti-surge switch 35 is connected to the voltage stabilizer 36, the voltage stabilizer 36 is connected to the power management module 37, the power management module 37 is connected to the battery pack 38, and the power management module 37 is connected to the connection module 8 and is connected to the data acquisition subsystem and the data storage transmission subsystem. The power supply 34 may be in a commercial power mode, a wind power mode, a solar power mode, or the like.
Further, the data storage module 9 can store various data collected by the data collection subsystem. The communication module 10 can implement wired or wireless communication to transmit various data collected by the collection subsystem. The wired communication can adopt optical fiber or network cable communication, and the wireless communication can adopt GPRS, 3G, 4G or 5G and other modes.
Further, the material of the corrosion-resistant counter electrode 18 is a corrosion-resistant material such as seawater-resistant stainless steel, platinum-plated titanium electrode, platinum electrode, or the like.
Furthermore, the material of the current collecting probe 16 is the same as that of the protected steel structure.
Further, the first reference electrode 15-1, the second reference electrode 15-2, and the third reference electrode 15-3 may be silver/silver chloride reference electrodes, high purity zinc reference electrodes, copper/copper sulfate electrodes, solid silver halide reference electrodes, or the like.
Furthermore, the insulating isolation layer may be made of polymer materials such as epoxy resin, nylon, and the like.
Example two
The implementation method of the sacrificial anode service performance monitoring and failure risk early warning system for the ocean desilting environment comprises the following steps:
(1) the sensor group 1 and the conduit 31 are assembled and fixed by a hoop, and the lead 32 is laid in the conduit 31 by wiring and sealed and protected;
(2) the assembled sensor group and the combination formed by the protective tube 31 are welded and fixed on the protected steel structure 29 through the welding feet 33;
(3) connecting the lead 32 of the sensor subsystem A with each module of the data acquisition subsystem B through the wiring module 8;
(4) connecting the data acquisition subsystem B with each module of the data storage and transmission subsystem C;
(5) and monitoring the service performance of the sacrificial anode and early warning the failure risk by the whole system. The data acquisition subsystem periodically sends an acquisition instruction to the sensor subsystem, acquires response data, transmits the data to the monitoring center through the communication module, and then realizes online monitoring, evaluation and failure risk early warning of the service performance of the sacrificial anode in the marine back-silting environment through monitoring center software.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (10)
1. The utility model provides a marine back-silting environment sacrificial anode service performance monitoring and inefficacy risk early warning system which characterized in that: the system comprises a sensor subsystem, a data acquisition subsystem, a data storage and transmission subsystem and a power module;
the sensor subsystem comprises N sensor groups, wherein N is more than or equal to 1, each sensor group comprises a couple pair sensor, a protection current sensor, a corrosion sensor and an environmental parameter sensor which are arranged in a protection box, and epoxy resin is cast among the 4 sensors to form an insulating isolation layer for isolation and form a whole; the couple sensor comprises a sacrificial anode probe, a protected electrode and a first reference electrode, wherein the sacrificial anode probe is square, the protected electrode is square, the sacrificial anode probe is positioned at the center of the square protected electrode, the sacrificial anode probe and the protected electrode are cast into an insulating isolation layer by epoxy resin for isolation, and the first reference electrode is arranged in the insulating isolation layer; the protection current sensor comprises a current collection probe, a second reference electrode and an electric connection point, wherein the current collection probe is annular, the second reference electrode is arranged at the center of the current collection probe and is isolated by an insulating isolation layer which is cast by epoxy resin, the current collection probe is connected with the electric connection point by a lead, a sampling resistor is connected between the current collection probe and the electric connection point in series, and the electric connection point is welded with a protected steel structure; the corrosion sensor comprises a corrosion-resistant counter electrode, a steel electrode, a sacrificial anode working electrode and a third reference electrode, wherein the steel electrode and the sacrificial anode working electrode are symmetrically distributed on two sides of the third reference electrode and are respectively sleeved in 3 mounting openings of the corrosion-resistant counter electrode, which are arranged in a layout mode, epoxy resin is cast in a gap part, and an insulating isolation layer is formed for isolation; the environment parameter sensor comprises a resistivity probe, a temperature probe, an oxidation-reduction potential electrode, a dissolved oxygen electrode, a pH electrode, a chlorine ion electrode and a sulfur ion electrode, wherein the probes and the electrodes of the environment parameter sensor are arranged at intervals according to the layout and are cast by epoxy resin to form an insulating isolation layer for isolation;
the N sensor groups are fixed on a wire protection pipe, the wire protection pipe is welded on a protected steel structure through welding feet, leads of the sensor groups are led into the wire protection pipe through respective protection boxes and led out upwards along the wire protection pipe, the led leads are connected into a data acquisition subsystem, the data acquisition subsystem is connected with a data storage and transmission subsystem, and the data storage and transmission subsystem is connected with a monitoring center in a wireless or wired mode;
the power supply module comprises a power supply, an anti-surge switch, a voltage stabilizer, a power supply management module and a battery pack, wherein the power supply is connected with the anti-surge switch, the anti-surge switch is connected with the voltage stabilizer, the voltage stabilizer is connected with the power supply management module, the power supply management module is connected with the battery pack, and the power supply management module is connected with the wiring module and is connected with the data acquisition subsystem and the data storage and transmission subsystem;
the data acquisition subsystem periodically sends an acquisition instruction to the sensor subsystem, acquires response data, transmits the data to the monitoring center through the communication module, and then realizes online monitoring, evaluation and failure risk early warning of the service performance of the sacrificial anode in the marine back-silting environment through monitoring center software.
2. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the data acquisition subsystem, the data storage and transmission subsystem and the power supply module are arranged in the instrument and equipment box.
3. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the data acquisition subsystem comprises a current acquisition module, a voltage acquisition module, an electrochemical test module and an environmental parameter acquisition module;
the lead wires led out from the sacrificial anode and the protected electrode in the galvanic couple sensor of the sensor group are connected with the current acquisition module of the data acquisition subsystem and used for acquiring galvanic couple current between the sacrificial anode and the protected electrode; the lead wires led out of the anode probe, the protected electrode and the first reference electrode are also connected with a voltage acquisition module of the data acquisition subsystem and used for monitoring the working potential of the sacrificial anode and the protection potential of the protected electrode;
the wire led out from the signal output end of the sampling resistor in the protection current sensor of the sensor group is connected with the voltage acquisition module of the data acquisition subsystem, because the resistance of the sampling resistor is known, the protection current between the protected steel structure and the current collecting probe can be obtained by dividing the voltage between the signal output ends of the sampling resistor by the resistance, and because the surface area of the current collecting probe is known, the protection current density can be obtained by dividing the surface area by the protection current; the current collecting probe in the protective current sensor of the sensor group and a lead led out from the second reference electrode are also connected with a voltage acquisition module of the data acquisition subsystem and used for monitoring the protective potential of the current collecting probe;
a sacrificial anode working electrode, a third reference electrode and an anti-corrosion counter electrode in a corrosion sensor of the sensor group form a three-electrode system, and leads led out of the three electrodes are connected with an electrochemical test module of a data acquisition subsystem and used for monitoring data such as sacrificial anode corrosion rate, sacrificial anode corrosion potential and the like; the steel electrode, the third reference electrode and the corrosion-resistant counter electrode form a three-electrode system, and leads led out of the three electrodes are connected with an electrochemical test module of the data acquisition subsystem and used for monitoring data such as steel corrosion rate, steel corrosion potential and the like;
and wires led out from the resistivity probe, the temperature probe, the oxidation-reduction potential electrode, the dissolved oxygen electrode, the pH electrode, the chloride ion electrode and the sulfur ion electrode in the environmental parameter sensor of the sensor group are connected with an environmental parameter acquisition module of the data acquisition subsystem and are used for monitoring the resistivity, the temperature, the oxidation-reduction potential, the dissolved oxygen content, the pH value, the chloride ion concentration and the sulfur ion concentration data of the sea mud or the seawater.
4. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the data storage and transmission subsystem comprises a data storage module and a communication module, and the data storage module is used for storing various data acquired by the data acquisition subsystem; the communication module is used for realizing wired or wireless communication and transmitting various data acquired by the acquisition subsystem.
5. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the material of the corrosion-resistant counter electrode is seawater-resistant stainless steel, a platinum-plated titanium electrode, a platinum electrode and other corrosion-resistant materials.
6. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the material of the collecting probe is the same as that of the protected steel structure.
7. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the first reference electrode, the second reference electrode and the third reference electrode adopt silver/silver chloride reference electrodes.
8. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: and the first reference electrode, the second reference electrode and the third reference electrode adopt high-purity zinc reference electrodes.
9. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the first reference electrode, the second reference electrode and the third reference electrode adopt copper/copper sulfate electrodes or solid silver halide reference electrodes.
10. The marine desilting environment sacrificial anode service performance monitoring and failure risk early warning system of claim 1, wherein: the insulating isolation layer is made of epoxy resin or nylon.
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| CN117214076A (en) * | 2023-09-14 | 2023-12-12 | 大连理工大学 | Comprehensive analysis device and monitoring method for corrosion state of marine structure |
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