A real-time monitoring and management system for the whole process of composite anticorrosion construction of a marine sheet pile wharf

Abstract

This invention relates to the field of corrosion prevention and control technology, specifically a real-time monitoring and management system for the entire process of composite corrosion prevention construction at marine sheet pile wharves. The system includes a pre-construction pretreatment control module for managing sandblasting dust and substrate salt content, verifying compressed air dew point and construction temperature and humidity, and ensuring that pre-coating conditions meet standards; a full-cycle monitoring module for monitoring spraying operation parameters, tracing construction trajectory images, and long-term collection of corrosion data from different marine zones, comprising a coating operation acquisition unit, a construction trajectory tracing unit, and a corrosion status monitoring unit; and a coating protection supervision module for controlling the welding quality and insulation performance of sacrificial anodes. This invention relies on a full range of monitoring hardware and an intelligent early warning mechanism across these four modules to achieve closed-loop management of the entire composite corrosion prevention process at marine sheet pile wharves, eliminating potential construction quality hazards at the source, extending the service life of steel structures, and reducing port operation and maintenance costs.

Description

Technical Field

[0001] This invention relates to the field of corrosion prevention and control technology, specifically to a real-time monitoring and management system for the entire process of composite corrosion prevention construction of marine sheet pile wharves. Background Technology

[0002] Currently, the construction of coastal ports in my country is continuously advancing towards deeper water and larger scale. As a core infrastructure of ports, marine sheet pile wharves are in a harsh corrosive environment with high salt spray, strong tides, and severe chloride ion penetration. The traditional anti-corrosion management model of manual inspection and post-construction repair is no longer suitable for the requirements of smart port construction. The industry urgently needs a digital monitoring and management system that covers the entire construction process and the entire service life to ensure the long-term safe service of the wharf steel structure facilities.

[0003] Existing corrosion control measures for marine sheet pile wharves suffer from several problems: lack of quantitative monitoring methods in the pre-treatment stage, poor traceability of coating process parameters, and inability to perceive corrosion status in real time during service. Data from different stages is scattered and isolated, and there is a lack of a unified intelligent analysis and early warning platform. Therefore, these measures do not meet the current needs. To address this, we propose a real-time monitoring and management system for the entire process of composite corrosion protection construction for marine sheet pile wharves. Summary of the Invention

[0004] The purpose of this invention is to provide a real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves, in order to solve the problems mentioned in the background art, such as the lack of quantitative monitoring methods in the pre-treatment stage before construction, poor traceability of coating process parameters, inability to perceive corrosion status in real time during service, scattered and isolated data in different stages, and lack of a unified intelligent analysis and early warning platform.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves, comprising: The pre-treatment control module is used to control sandblasting dust and substrate salt content, and to verify the dew point of compressed air and the temperature and humidity during construction, so as to ensure that the pre-coating conditions meet the standards. The full-cycle monitoring module is used to monitor spraying operation parameters, trace construction trajectory images, and collect corrosion data from different marine zones over a long period of time. The full-cycle monitoring module consists of a coating operation acquisition unit, a construction trajectory tracing unit, and a corrosion status monitoring unit. The coating protection monitoring module is used to control the welding quality and insulation performance of sacrificial anodes, and to keep the component protection potential within the compliance range by dynamically adjusting the current; The operation and maintenance management platform is used to aggregate monitoring data from the entire chain to complete the visualization display, and to assess corrosion risks and issue early warnings in real time. The operation and maintenance management platform consists of a data processing and display unit and a corrosion early warning model. The pre-construction pretreatment control module performs pretreatment before anti-corrosion construction, while the full-cycle monitoring module records the entire coating process and corrosion status data. The coating protection supervision module accurately controls the cathodic protection operation status based on the aforementioned data. All the multi-dimensional data obtained from the monitoring of these three modules are uniformly integrated into the operation and maintenance management platform and analyzed and warned through the corrosion early warning model. The four modules are linked together to form a closed loop for the full life cycle control of anti-corrosion of marine sheet pile wharves.

[0006] Preferably, the pre-treatment control module consists of a substrate pre-treatment monitoring unit and an environmental parameter verification unit. The substrate pre-treatment monitoring unit consists of a vacuum sandblasting machine and a surface salinity detector. The vacuum sandblasting machine is used to recover sandblasting abrasive and control dust emission concentration, which is ≤2mg / m³. 3 The surface salinity analyzer is used to detect the residual salt content on the surface of sheet piles using the Bresle method. The standard residual salt content on the surface of the sheet piles is ≤20 mg / m³. 2 ; The environmental parameter verification unit consists of a dew point meter and a temperature and humidity sensor. The dew point meter is used to monitor the dew point of compressed air and ensure the conditions for sandblasting operations. The dew point of the compressed air is ≤-40℃. The temperature and humidity sensor is used to collect the ambient temperature and relative humidity in real time.

[0007] Preferably, the coating operation acquisition unit consists of a pressure sensor and a wet film thickness gauge. The pressure sensor is used to monitor the spraying pressure of the airless sprayer, which is 20-25 MPa. The wet film thickness gauge is used to provide real-time feedback of wet film thickness data, and the density of the wet film thickness gauges is 10m. 2 No fewer than 3 testing sites; The construction trajectory tracing unit consists of personnel positioning tags and high-definition explosion-proof PTZ cameras. The personnel positioning tags are used to record the work area and operation time of the construction personnel, and the high-definition explosion-proof PTZ cameras are used to record the entire spraying operation process and retain construction image data. The corrosion status monitoring unit consists of a corrosion monitoring sensor unit and a high-voltage spark leak detector. The corrosion monitoring sensor unit is used to collect corrosion rate data of different marine zones in real time, and the high-voltage spark leak detector is used to scan the coating after construction and to check for pinholes and through cracks.

[0008] Preferably, the coating protection monitoring module consists of a coating protection unit, an anode installation quality monitoring unit, and a potential parameter control unit. The coating protection unit consists of an installation connection assembly and a floating contact assembly. The installation connection assembly is located directly above the floating contact assembly. The floating contact assembly includes a connection cover, and an installation shell is fixedly installed at the bottom of the connection cover. An anode rod is fixedly installed in the middle of the installation shell. Multiple partitions are fixedly installed on the inner side of the installation shell, and a float is provided between every two partitions. The multiple floats are arranged circumferentially relative to the axis of the installation shell.

[0009] Preferably, the mounting connection assembly includes a winding box, a crank handle is rotatably connected to the inner side of the winding box, a locking knob is installed in the middle of the crank handle, a connecting nylon rope is fixedly wound around one end of the crank handle located inside the winding box, the bottom end of the connecting nylon rope passes through the winding box and is fixedly connected to the connecting cover, one end of the locking knob passes through the crank handle and is threadedly connected to the winding box, and the crank handle and the winding box are locked together by the locking knob.

[0010] Preferably, the anode installation quality monitoring unit consists of a welding current recorder and an insulation resistance tester. The welding current recorder is used to collect current parameters during the sacrificial anode welding process and ensure that the weld height meets the standard. The insulation resistance tester is used to test the insulation performance of the insulating gasket between the anode and the structure. The potential parameter control unit consists of an underwater potential measuring instrument and a current rectifier. The underwater potential measuring instrument is used to collect the protective potential of the sheet pile surface in real time. The protective potential is -0.85V to -1.05V. The current rectifier is used to automatically adjust the output voltage. The fluctuation of the output voltage is less than ±5%.

[0011] Preferably, the operation and maintenance management platform consists of a data processing and display unit and a corrosion early warning model. The data processing and display unit consists of an edge acquisition terminal, an industrial-grade UDP communication module, an industrial gateway, a data server, and a display terminal. The data processing and display unit processes, analyzes, and transforms multidimensional data through the edge acquisition terminal, the industrial-grade UDP communication module, the industrial gateway, and the data server, and transmits it to the corrosion early warning model. The display terminal displays the multidimensional data and the early warning results output by the corrosion early warning model.

[0012] Preferably, the corrosion early warning model has a built-in corrosion risk assessment algorithm. The corrosion early warning model is used to predict the corrosion status of marine sheet piles and estimate the corrosion loss time through multi-dimensional data fusion and mechanism model coupling, and to trigger the early warning level by setting a dynamic threshold.

[0013] Preferably, the warning levels are divided into yellow warning, orange warning and red warning in order from low to high. The judgment index for yellow warning is that the output voltage fluctuation is greater than ±5%. The judgment index for orange warning is that the measured corrosion rate is greater than the design allowable value. The judgment index for red warning is that the remaining wall thickness is less than the minimum safe thickness. ; in, The corrosion rate at temperature T. This is a comprehensive constant, and it is related to material properties and hydrochemical conditions. For activation energy, steel is typically selected at 40-60 kJ / mol. Let be the gas constant, taken as 8.314 J / (mol·K), and T be the absolute temperature.

[0014] Preferably, the corrosion loss time t of the marine sheet pile is: ; Where d is the initial thickness of the marine sheet pile, To allow for a certain percentage of thickness loss, The average corrosion rate after the protective layer cracks is typically greater than [a certain value]. ; ; in, The average corrosion rate before the protective layer cracks is given, and K is the conversion factor, which is used when the atomic weight of iron is 55.85 and the density is 7.85 g / cm³. 3 The value is usually 0.0116. This represents the corrosion current density, in units of... .

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by relying on the substrate pretreatment monitoring unit and environmental parameter verification unit of the pretreatment control module before construction, can achieve full quantitative control of sandblasting dust emissions, substrate residual salt content, compressed air dew point, and construction temperature and humidity, thus eliminating the risk of coating peeling caused by substandard preconditions from the source. Compared with the traditional manual sampling inspection mode, the compliance rate of the pretreatment process is effectively improved. 2. This invention, through the coordinated operation of the full-cycle monitoring module and the coating protection supervision module, combined with the corrosion early warning model and hierarchical early warning mechanism of the operation and maintenance management platform, can realize the traceability of the entire coating process, the dynamic and precise adjustment of the cathodic protection potential, and the early prediction of corrosion risks. It completely breaks down the data silos in each link, effectively extends the design life of the anti-corrosion system of marine sheet pile wharves, and significantly reduces the operation and maintenance costs of the port throughout its entire life cycle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a flowchart illustrating the early warning process of the corrosion early warning model of this invention. Figure 3 This is a schematic diagram of the structure of the coating protection unit of the present invention; Figure 4 This is a cross-sectional structural diagram of the floating contact component of the present invention; Figure 5 This is a schematic diagram of the installation structure of the float of the present invention; Figure 6 This is an application flowchart of the real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves, as described in this invention.

[0017] In the diagram: 1. Installation connection assembly; 101. Rewind box; 102. Locking knob; 103. Handle; 104. Connecting nylon rope; 2. Floating contact assembly; 201. Connecting cover; 202. Mounting shell; 203. Anode rod; 204. Float; 205. Divider. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figure 1 This invention provides an embodiment of a real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves. The system includes a pre-construction pretreatment control module, a full-cycle monitoring module, a coating protection supervision module, and an operation and maintenance management platform. The pre-construction pretreatment control module performs pretreatment before anti-corrosion construction. At the same time, the full-cycle monitoring module records the entire coating process and corrosion status data. The coating protection supervision module accurately controls the cathodic protection operation status based on the aforementioned data. All the multi-dimensional data obtained from the monitoring of the three modules are uniformly integrated into the operation and maintenance management platform and analyzed and warned through a corrosion early warning model. The four modules are connected to form a closed loop for the full life cycle management of anti-corrosion of marine sheet pile wharves.

[0020] Please see Figure 1 The pre-treatment control module is used to manage sandblasting dust and substrate salt content, and to verify compressed air dew point and construction temperature and humidity, ensuring that pre-coating conditions meet standards. The module consists of a substrate pre-treatment monitoring unit and an environmental parameter verification unit. The substrate pre-treatment monitoring unit comprises a vacuum sandblasting machine and a surface salt content detector. The vacuum sandblasting machine is used to recover sandblasting abrasive and control dust emission concentration, which is ≤2mg / m³. 3The surface salt content analyzer is used to detect the residual salt content on the surface of sheet piles using the Bresle method. The standard residual salt content on the surface of sheet piles is ≤20 mg / m³. 2 ; The environmental parameter calibration unit consists of a dew point meter and a temperature and humidity sensor. The dew point meter is used to monitor the dew point of compressed air and ensure the conditions for sandblasting operations. The dew point of compressed air is ≤-40℃. The temperature and humidity sensor is used to collect the ambient temperature and relative humidity in real time.

[0021] Please see Figure 1 The full-cycle monitoring module is used to monitor spraying operation parameters, trace construction trajectory images, and collect long-term corrosion data from different marine zones. The module consists of a coating operation acquisition unit, a construction trajectory tracing unit, and a corrosion status monitoring unit. The coating operation acquisition unit comprises a pressure sensor and a wet film thickness gauge. The pressure sensor monitors the spraying pressure of the airless sprayer (20-25 MPa), and the wet film thickness gauge provides real-time feedback of wet film thickness data. The wet film thickness gauges are deployed at a density of every 10m. 2 No fewer than 3 testing sites; The construction trajectory traceability unit consists of personnel positioning tags and high-definition explosion-proof PTZ cameras. The personnel positioning tags are used to record the work area and operation time of the construction personnel, while the high-definition explosion-proof PTZ cameras are used to record the entire spraying operation process and retain construction image data. The corrosion status monitoring unit consists of a corrosion monitoring sensor unit and a high-voltage spark leak detector. The corrosion monitoring sensor unit is used to collect corrosion rate data of different marine zones in real time, while the high-voltage spark leak detector is used to scan the coating after construction and check for pinholes and through cracks.

[0022] Please see Figure 1 The coating protection monitoring module is used to control the welding quality and insulation performance of sacrificial anodes, and to maintain the protective potential of the components within the compliant range by dynamically adjusting the current. The coating protection monitoring module consists of a coating protection unit, an anode installation quality monitoring unit, and a potential parameter control unit. The anode installation quality monitoring unit consists of a welding current recorder and an insulation resistance tester. The welding current recorder is used to collect the current parameters during the welding process of sacrificial anodes and to ensure that the weld height meets the standards. The insulation resistance tester is used to test the insulation performance of the insulating gasket between the anode and the structure. The potential parameter control unit consists of an underwater potential measuring instrument and a current rectifier. The underwater potential measuring instrument is used to collect the protective potential of the sheet pile surface in real time. The protective potential is -0.85V to -1.05V. The current rectifier is used to automatically adjust the output voltage, and the fluctuation of the output voltage is less than ±5%.

[0023] Please see Figures 3 to 5The coating protection unit consists of an installation connection assembly 1 and a floating contact assembly 2. The installation connection assembly 1 is located directly above the floating contact assembly 2. The floating contact assembly 2 includes a connection cover 201. An installation shell 202 is fixedly installed at the bottom of the connection cover 201. An anode rod 203 is fixedly installed in the middle of the installation shell 202. Multiple partitions 205 are fixedly installed on the inner side of the installation shell 202. A float 204 is provided between every two partitions 205. The multiple floats 204 are arranged in a circle relative to the axis of the installation shell 202. The floating contact assembly 2 facilitates the floating support of the anode rod 203 on seawater, maintains the depth of the anode rod 203 inserted into the seawater, and protects the marine sheet pile, which is the negative electrode, by sacrificing the anode rod 203 as the anode. The mounting connection assembly 1 includes a rewind box 101, with a crank 103 rotatably connected to the inside of the rewind box 101. A locking knob 102 is installed in the middle of the crank 103. A connecting nylon rope 104 is fixedly wound around one end of the crank 103 located inside the rewind box 101. The bottom end of the connecting nylon rope 104 passes through the rewind box 101 and is fixedly connected to the connecting cover 201. One end of the locking knob 102 passes through the crank 103 and is threadedly connected to the rewind box 101. The crank 103 and the rewind box 101 are locked together by the locking knob 102. The mounting connection assembly 1 facilitates the movable connection of the floating contact assembly 2, which helps to maintain stable contact between the anode rod 203 and the seawater while the seawater is floating.

[0024] Please see Figure 1 and Figure 2 The operation and maintenance management platform is used to aggregate monitoring data across the entire chain for visualization and to assess corrosion risks and issue early warnings in real time. The platform consists of a data processing and display unit and a corrosion early warning model. The data processing and display unit comprises an edge acquisition terminal, an industrial-grade UDP communication module, an industrial gateway, a data server, and a display terminal. The data processing and display unit processes, analyzes, and transforms multidimensional data through the edge acquisition terminal, the industrial-grade UDP communication module, the industrial gateway, and the data server, and transmits it to the corrosion early warning model. The display terminal displays the multidimensional data and the early warning results output by the corrosion early warning model. The corrosion early warning model has a built-in corrosion risk assessment algorithm. It is used to predict the corrosion status of marine sheet piles and estimate the corrosion loss time by coupling multi-dimensional data fusion and mechanism model. The model triggers the early warning level by setting dynamic thresholds. The early warning levels are divided into yellow, orange and red warnings from low to high. The criteria for yellow warning is that the output voltage fluctuation is greater than ±5%. The criteria for orange warning is that the measured corrosion rate is greater than the design allowable value. The criteria for red warning is that the remaining wall thickness is less than the minimum safe thickness. ; in, The corrosion rate at temperature T. This is a comprehensive constant, and it is related to material properties and hydrochemical conditions. For activation energy, steel is typically selected at 40-60 kJ / mol. Let be the gas constant, taken as 8.314 J / (mol·K), and T be the absolute temperature.

[0025] The corrosion loss time t of marine sheet piles is: ; Where d is the initial thickness of the marine sheet pile, To allow for a certain percentage of thickness loss, The average corrosion rate after the protective layer cracks is typically greater than [a certain value]. ; ; in, The average corrosion rate before the protective layer cracks is given, and K is the conversion factor, which is used when the atomic weight of iron is 55.85 and the density is 7.85 g / cm³. 3 The value is usually 0.0116. This represents the corrosion current density, in units of... .

[0026] Please see Figure 6 The application of a real-time monitoring and management system for the entire process of composite corrosion protection construction of marine sheet pile wharves includes the following steps: S1: Pre-construction pretreatment control, the dust emission concentration is controlled by the vacuum sand suction machine of the substrate pretreatment monitoring unit, the residual salt on the surface of the sheet pile is detected by the surface salt content detector, and the dew point of the compressed air is monitored by the dew point meter of the environmental parameter verification unit. The temperature and relative humidity of the construction environment are collected in real time by the temperature and humidity sensor, and all the preconditions for the coating operation are verified to meet the standards in all dimensions. S2: Full-process construction and full-cycle monitoring. The spraying pressure of the airless sprayer is stably controlled by the pressure sensor of the coating operation acquisition unit. The wet film thickness gauge collects the wet film thickness data of the coating in real time. At the same time, the personnel positioning tags of the construction trajectory traceability unit record the operation area and operation time of the operators. The high-definition explosion-proof PTZ camera records the spraying operation video throughout the process. Subsequently, the corrosion monitoring sensor unit of the corrosion status monitoring unit continuously collects the corrosion rate of different marine zones. The high-voltage electric spark leak detector scans and checks for pinholes and penetrating cracks in the coating. S3: Precise control of the cathodic protection system. The welding current recorder of the anode installation quality monitoring unit collects the current parameters of the sacrificial anode welding process to ensure that the weld height meets the standard. The insulation resistance tester tests the insulation performance of the insulating gasket between the anode and the structure. After the anode installation quality verification is completed, the underwater potential measuring instrument of the potential parameter control unit collects the protective potential data of the sheet pile surface in real time, and the linkage current rectifier automatically adjusts the output voltage to maintain the stable operation of the entire cathodic protection system. S4: Full-link data aggregation and early warning processing. Multi-dimensional monitoring data generated at each stage of the entire process are processed and analyzed by the data processing and display unit and then transmitted to the corrosion early warning model. Relying on the built-in corrosion risk assessment algorithm, the multi-source data and mechanism model are coupled to dynamically determine the early warning level. All monitoring data and early warning results are simultaneously pushed to the display terminal for visualization, realizing closed-loop management of the entire life cycle of corrosion prevention of marine sheet pile wharves.

[0027] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A real-time monitoring and management system for the entire process of composite corrosion protection construction of marine sheet pile wharves, characterized in that, include: The pre-treatment control module is used to control sandblasting dust and substrate salt content, and to verify the dew point of compressed air and the temperature and humidity during construction, so as to ensure that the pre-coating conditions meet the standards. The full-cycle monitoring module is used to monitor spraying operation parameters, trace construction trajectory images, and collect corrosion data from different marine zones over a long period of time. The full-cycle monitoring module consists of a coating operation acquisition unit, a construction trajectory tracing unit, and a corrosion status monitoring unit. The coating protection monitoring module is used to control the welding quality and insulation performance of sacrificial anodes, and to keep the component protection potential within the compliance range by dynamically adjusting the current; The operation and maintenance management platform is used to aggregate monitoring data from the entire chain to complete the visualization display, and to assess corrosion risks and issue early warnings in real time. The operation and maintenance management platform consists of a data processing and display unit and a corrosion early warning model. The pre-construction pretreatment control module performs pretreatment before anti-corrosion construction, while the full-cycle monitoring module records the entire coating process and corrosion status data. The coating protection supervision module accurately controls the cathodic protection operation status based on the aforementioned data. All the multi-dimensional data obtained from the monitoring of these three modules are uniformly integrated into the operation and maintenance management platform and analyzed and warned through the corrosion early warning model. The four modules are linked together to form a closed loop for the full life cycle control of anti-corrosion of marine sheet pile wharves.

2. The real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 1, characterized in that: The pre-construction pretreatment control module consists of a substrate pretreatment monitoring unit and an environmental parameter verification unit. The substrate pretreatment monitoring unit consists of a vacuum sandblasting machine and a surface salinity detector. The vacuum sandblasting machine is used to recover the sandblasting abrasive and control the dust emission concentration, which is ≤2mg / m³. 3 ; The surface salinity analyzer is used to detect the residual salt content on the surface of sheet piles using the Bresle method. The standard residual salt content on the surface of sheet piles is ≤20 mg / m³. 2 ; The environmental parameter verification unit consists of a dew point meter and a temperature and humidity sensor. The dew point meter is used to monitor the dew point of compressed air and ensure the conditions for sandblasting operations. The dew point of compressed air is ≤-40℃.

3. The real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 2, characterized in that: The coating operation acquisition unit consists of a pressure sensor and a wet film thickness gauge. The pressure sensor monitors the spraying pressure of the airless sprayer, which is 20-25 MPa. The wet film thickness gauge provides real-time feedback of the wet film thickness data, and the gauges are deployed at a density of 10 m. 2 No fewer than 3 testing sites; The construction trajectory traceability unit consists of personnel positioning tags and high-definition explosion-proof PTZ cameras. The personnel positioning tags are used to record the work area and operation time of the construction personnel, while the high-definition explosion-proof PTZ cameras are used to record the entire spraying operation process and retain construction image data. The corrosion status monitoring unit consists of a corrosion monitoring sensor unit and a high-voltage spark leak detector. The corrosion monitoring sensor unit is used to collect corrosion rate data of different marine zones in real time, and the high-voltage spark leak detector is used to scan the coating after construction and to check for pinholes and through cracks.

4. The real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 3, characterized in that: The coating protection monitoring module consists of a coating protection unit, an anode installation quality monitoring unit, and a potential parameter control unit. The coating protection unit consists of an installation connection assembly (1) and a floating contact assembly (2). The installation connection assembly (1) is located directly above the floating contact assembly (2). The floating contact assembly (2) includes a connection cover (201). An installation shell (202) is fixedly installed at the bottom of the connection cover (201). An anode rod (203) is fixedly installed in the middle of the installation shell (202). Multiple partitions (205) are fixedly installed on the inner side of the installation shell (202). A float (204) is provided between every two partitions (205). The multiple floats (204) are arranged in a circle relative to the axis of the installation shell (202).

5. The real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 4, characterized in that: The mounting connection assembly (1) includes a winding box (101), a crank (103) is rotatably connected to the inner side of the winding box (101), a locking knob (102) is installed in the middle of the crank (103), a connecting nylon rope (104) is fixedly wound around one end of the crank (103) located inside the winding box (101), the bottom end of the connecting nylon rope (104) passes through the winding box (101) and is fixedly connected to the connecting cover (201), one end of the locking knob (102) passes through the crank (103) and is connected to the winding box (101) by a thread, and the crank (103) and the winding box (101) are locked together by the locking knob (102).

6. The real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 5, characterized in that: The anode installation quality monitoring unit consists of a welding current recorder and an insulation resistance tester. The welding current recorder is used to collect current parameters during the sacrificial anode welding process and ensure that the weld height meets the standard. The insulation resistance tester is used to test the insulation performance of the insulating gasket between the anode and the structure. The potential parameter control unit consists of an underwater potential measuring instrument and a current rectifier. The underwater potential measuring instrument is used to collect the protective potential of the sheet pile surface in real time. The protective potential is -0.85V to -1.05V. The current rectifier is used to automatically adjust the output voltage. The fluctuation of the output voltage is less than ±5%.

7. The real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 6, characterized in that: The operation and maintenance management platform consists of a data processing and display unit and a corrosion early warning model. The data processing and display unit consists of an edge acquisition terminal, an industrial-grade UDP communication module, an industrial gateway, a data server, and a display terminal. The data processing and display unit processes, analyzes, and transforms multidimensional data through the edge acquisition terminal, the industrial-grade UDP communication module, the industrial gateway, and the data server, and transmits it to the corrosion early warning model. The display terminal displays the multidimensional data and the early warning results output by the corrosion early warning model.

8. The real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 7, characterized in that: The corrosion early warning model has a built-in corrosion risk assessment algorithm. It is used to predict the corrosion status of marine sheet piles and estimate the corrosion loss time by coupling multi-dimensional data fusion with a mechanism model, and to trigger the early warning level by setting a dynamic threshold.

9. A real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 8, characterized in that: The warning levels are divided into yellow warning, orange warning and red warning from low to high. The criteria for determining a yellow warning is that the output voltage fluctuation is greater than ±5%. The criteria for determining an orange warning is that the measured corrosion rate is greater than the design allowable value. The criteria for determining a red warning is that the remaining wall thickness is less than the minimum safe thickness. ； in, The corrosion rate at temperature T. This is a comprehensive constant, and it is related to material properties and hydrochemical conditions. For activation energy, steel is typically selected at 40-60 kJ / mol. Let be the gas constant, taken as 8.314 J / (mol·K), and T be the absolute temperature.

10. A real-time monitoring and management system for the entire process of composite anti-corrosion construction of marine sheet pile wharves according to claim 9, characterized in that: The corrosion loss time t of the marine sheet pile is: ； Where d is the initial thickness of the marine sheet pile, To allow for a certain percentage of thickness loss, The average corrosion rate after the protective layer cracks is typically greater than [a certain value]. ; ； in, The average corrosion rate before the protective layer cracks is given, and K is the conversion factor, which is used when the atomic weight of iron is 55.85 and the density is 7.85 g / cm³. 3 The value is usually 0.0116. This represents the corrosion current density, in units of... .

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