CN113981454B - Impressed current cathodic protection local repair device and repair method of floating platform - Google Patents
Impressed current cathodic protection local repair device and repair method of floating platform Download PDFInfo
- Publication number
- CN113981454B CN113981454B CN202111265460.3A CN202111265460A CN113981454B CN 113981454 B CN113981454 B CN 113981454B CN 202111265460 A CN202111265460 A CN 202111265460A CN 113981454 B CN113981454 B CN 113981454B
- Authority
- CN
- China
- Prior art keywords
- composite cable
- floating platform
- potential
- cable
- platform
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007667 floating Methods 0.000 title claims abstract description 88
- 238000004210 cathodic protection Methods 0.000 title claims abstract description 47
- 230000008439 repair process Effects 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 139
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims description 31
- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- 238000012544 monitoring process Methods 0.000 claims description 22
- 238000005067 remediation Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- 239000000565 sealant Substances 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 1
- 230000006378 damage Effects 0.000 abstract description 16
- 229910052751 metal Inorganic materials 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract description 5
- 238000005536 corrosion prevention Methods 0.000 abstract description 2
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 229910021607 Silver chloride Inorganic materials 0.000 description 6
- 238000009434 installation Methods 0.000 description 6
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- C23F13/04—Controlling or regulating desired parameters
-
- 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
- C23F13/20—Conducting electric current to electrodes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
- C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
- C23F13/06—Constructional parts, or assemblies of cathodic-protection apparatus
- C23F13/08—Electrodes specially adapted for inhibiting corrosion by cathodic protection; Manufacture thereof; Conducting electric current thereto
- C23F13/22—Monitoring arrangements therefor
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F2213/00—Aspects of inhibiting corrosion of metals by anodic or cathodic protection
- C23F2213/30—Anodic or cathodic protection specially adapted for a specific object
- C23F2213/31—Immersed structures, e.g. submarine structures
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Prevention Of Electric Corrosion (AREA)
Abstract
The invention discloses an impressed current cathodic protection local repair device and a repair method of a floating platform, relates to the technical field of marine metal corrosion prevention, and particularly relates to an impressed current cathodic protection local repair device and a repair method of the floating offshore platform. The current control equipment is arranged inside the waterproof junction box; the reticular auxiliary anode and the reference electrode are arranged outside the ocean floating platform, are fixed on the composite cable through the auxiliary anode sealing structure and the reference electrode sealing structure and are connected with the electric wire inside the composite cable; the composite cable is wound on the pay-off device; the head end of the composite cable is electrically connected with the current control device, and the tail end of the composite cable is connected to the sacrificial anode protection frame. The technical scheme of the invention solves the problem that in the prior art, because the position of the area to be repaired is uncertain due to the complex structure of the ocean platform and the size of the protection current required by the area to be repaired is different, a cathode protection repair system device which can be flexibly arranged needs to be designed according to the actual damage condition.
Description
Technical Field
The invention discloses an impressed current cathodic protection local repair device and a repair method of a floating platform, relates to the technical field of marine metal corrosion prevention, and particularly relates to an impressed current cathodic protection local repair device and a repair method of the floating offshore platform.
Background
The floating platform is a steel structure platform, and is a drilling platform and a construction platform which are widely applied at present. Such ocean platforms float above the ocean using mooring. Because seawater is a strong corrosion medium, if no effective anti-corrosion measures are taken, the floating platform must be damaged by corrosion in a harsh marine environment, the service life of the platform can be shortened, and the national economic property is lost.
The corrosion protection of steel structure platforms in marine environments generally employs a sacrificial anode cathodic protection method. However, a large amount of aluminum, zinc and heavy metal ions are released into seawater in the sacrificial anode dissolving process, potential threat is caused to marine ecology, and due to the fact that the electrolytic aluminum industry belongs to high energy consumption industry, double pollution is caused to the natural environment by smelting and dissolving consumption of the sacrificial anode. For floating platforms that have reached their design life but still need to continue to be used for extended life, or for in-service offshore platforms that have failed the original cathodic protection system and need to be replaced, the service life must be extended by cathodic protection remediation techniques. Considering the environmental factor, the impressed current repairing method is simpler in structure and more environment-friendly.
Chinese patent document CN108286249A discloses an ocean platform tensioning impressed current cathodic protection system, which comprises a rectifier, an upper end fixing device, a connecting piece i, a composite cable, a connecting piece ii and a lower end fixing device; the composite cable is provided with a reference electrode and an auxiliary anode at the designated positions, the upper end and the lower end of the composite cable are respectively provided with an end cable joint, and the end cable joints are connected with the fixing device through connecting parts. The deflection deformation of the composite cable is limited by adjusting the tension of the composite cable, so that the composite cable, the auxiliary anode and the reference electrode are prevented from colliding with an ocean platform structure under the action of wind, waves and currents to be damaged. The installation and arrangement method is characterized in that the tension type impressed current cathodic protection system and the fixing device thereof are pre-installed before the ocean platform is launched into water, after the platform is in place, other parts of the tension type impressed current cathodic protection system are put down to complete the assembly of the offshore system, the number and the distribution position of each part in the system can be determined by numerical simulation calculation, the installation method only can realize the overall cathodic protection of the platform and can not effectively repair the local part, the auxiliary anode is arranged on the center shaft of the jacket platform, the current is released from top to bottom, and only the overall current distribution of the platform can be regulated and controlled.
Chinese patent document CN104278277A discloses a sacrificial anode stack for cathodic protection rapid repair, comprising: a sacrificial anode piles, with the installation clamp that sacrificial anode piles links to each other, wherein, the installation clamp is: a U-shaped structure which is matched with the tubular metal structure; the sacrificial anode stack is of a frame-type structure comprising: a frame, a plurality of sacrificial anodes and balancing weights which are arranged on the frame. The invention has simple structure and convenient installation, can quickly repair the cathode protection of the marine metal structure, and avoids the marine metal structure from being corroded and damaged by seawater; moreover, the device can be conveniently installed only by an underwater robot or a diver; although the installation cost is reduced, the structure form cannot realize accurate repair control, the sacrificial anode cannot be changed again after being arranged, and the subsequent potential change cannot be further regulated and controlled. The applied current system can control the output current of different anodes, thereby achieving the purpose-oriented adjustment. Meanwhile, the sacrificial anode system per se can damage the marine environment compared with an impressed current system, and a large amount of metal ions are released into the marine environment to cause pollution to a certain degree.
However, the position of the area to be repaired with a complex ocean platform structure is uncertain, and the required protection current of the area to be repaired is different, so that a cathode protection repair system device which can be flexibly arranged needs to be designed according to the actual damage condition. In addition, it is very necessary to reduce the offshore operation time, reduce the offshore operation risk and ensure the personal safety of the operators.
Aiming at the problems in the prior art, a novel impressed current cathodic protection local repair device and a repair method of a floating platform are researched and designed, so that the problems in the prior art are very necessary to be overcome.
Disclosure of Invention
According to the technical problem that the cathode protection repair system device which can be flexibly arranged needs to be designed according to actual damaged conditions due to the fact that the position of a complex to-be-repaired area of an ocean platform structure is uncertain and the required protection current of the to-be-repaired area is different, and the prior art provides the impressed current cathode protection local repair device of the floating platform and the repair method thereof, wherein the impressed current cathode protection local repair device is simple in structure, convenient to install, long in service life, low in cost and free of potential ocean ecological pollution hidden troubles.
The technical means adopted by the invention are as follows:
an impressed current cathodic protection local remediation device for a floating platform, comprising: the device comprises a waterproof junction box, a potential detector, an ocean floating platform deck, an ocean floating platform, a current detection sensor, a potential detection sensor, a sacrificial anode and a sacrificial anode protection frame;
furthermore, the waterproof junction box is arranged on a deck of the ocean floating platform at the upper part of the ocean floating platform, and a potential detector is arranged in the waterproof junction box;
furthermore, a potential detection sensor is arranged inside the ocean floating platform, and a current detection sensor and a sacrificial anode are arranged at the bottom of the ocean floating platform;
furthermore, a sacrificial anode protection frame is arranged at the bottom of the ocean floating platform, is positioned outside the sacrificial anode and is used for protecting the sacrificial anode from collision;
further, impressed current cathodic protection local prosthetic devices of floating platform still includes: the device comprises a current control device, a composite cable reference electrode and a mesh auxiliary anode;
furthermore, the current control equipment is arranged inside the waterproof junction box; the current control equipment adopts an oil cooling mode, the transformation and electrical components of the current control equipment are sealed in cooling oil, and the high-voltage area is isolated from the operation area.
Furthermore, the current control equipment comprises a plurality of standardized auxiliary anode control modules, each module independently controls one auxiliary anode, and the current control equipment is also provided with a signal acquisition processing display device.
Further, anticorrosive paint is sprayed on the surface of the waterproof junction box.
Furthermore, the reticular auxiliary anode and the reference electrode are arranged outside the ocean floating platform, are respectively fixed on the composite cable through the auxiliary anode sealing structure and the reference electrode sealing structure, and are connected with the electric wire inside the composite cable through the electric wire;
furthermore, the composite cable is wound on a pay-off device arranged on a deck of the ocean floating platform, and the pay-off device is used for collecting the composite cable;
furthermore, the head end of the composite cable enters the interior of the waterproof junction box and is electrically connected with the current control device, and the tail end of the composite cable is connected to the sacrificial anode protection frame through the composite cable end connection structure.
Furthermore, the composite cable comprises a hypochlorous acid resistant outer sheath, a reinforcement, a signal core power core, an inner filler, a tensile element, an inner sheath and an armor layer; the composite cable is characterized in that the center of the cross section of the composite cable is a tensile element, the outer side of the tensile element is an inner sheath and a signal core power core, the outer side of the core is wrapped by an inner filler, the outer side of the core is an armor layer and a hypochlorous acid resistant outer sheath, and the reinforcing part is arranged in the armor layer and the hypochlorous acid resistant outer sheath.
Furthermore, a sealing device with a waterproof function is arranged on the composite cable, and a reference electrode and a mesh-shaped auxiliary anode are arranged in the sealing device;
furthermore, N reticular auxiliary anodes and N-1 reference electrodes are arranged on the composite cable; the distance between two adjacent mesh-shaped auxiliary anodes is 2-5 m, and a reference electrode is arranged between the two adjacent mesh-shaped auxiliary anodes.
Furthermore, the reference electrode adopts a silver chloride solid reference electrode, and is connected with a terminal box of a data acquisition device on the potential detector through a composite cable, namely is connected with the reference electrode terminal.
Furthermore, the negative pole of the current control device is connected with the ocean floating platform through a grounding wire, and the positive pole of the current control device is connected with the net-shaped auxiliary anode through a composite cable.
Furthermore, the sealing structure of the mesh-shaped auxiliary anode and the sealing structure of the reference electrode are made of nylon and matched with a nylon stuffing box or a stainless steel stuffing box;
furthermore, the water pressure resistance strength of the reticular auxiliary anode sealing structure and the reference electrode sealing structure is more than 1.6 Mpa.
Furthermore, the mesh auxiliary anode is an MMO anode or a platinized anode, is in a mesh cylinder shape and is sleeved on the cable; one end of the net-shaped auxiliary anode is welded with a conductive column to be connected into the net-shaped auxiliary anode watertight structure.
Furthermore, a plurality of mounting holes are formed in the waterproof junction box, the composite cable enters the waterproof junction box through the mounting holes in a connected mode, and other wires such as a ground wire can enter and exit the composite cable through the rest mounting holes;
further, a watertight joint is arranged between the mounting hole and the electric wire.
Further, the composite cable end connection structure includes: the tail end connecting device comprises a tail end connecting device bolt, a tail end connecting device shackle, a connecting device sheath and epoxy resin sealant;
further, the tail end connecting device shackle and the connecting device sheath are both made of stainless steel materials;
furthermore, one end of the connecting device sheath is welded with the tail end connecting device shackle, and the other end of the connecting device sheath is connected with the composite cable through the watertight connector;
furthermore, epoxy resin sealant is filled between the connecting device sheath and the composite cable;
further, the tail end connector shackle is connected with the sacrificial anode protection frame through a tail end connector bolt.
Furthermore, the device for impressed current cathodic protection local repair of the ocean floating platform comprises an upper end fixedly arranged in a waterproof junction box on a deck of the floating platform, a lower end fixed on a sacrificial anode support through a composite cable tail end connecting structure, a pay-off device for determining the length of the composite cable, and a packing box of the waterproof junction box for locking the composite cable, so that the composite cable is tensioned and fixed.
Furthermore, a plurality of sacrificial anode protection frames are arranged at different positions of the ocean floating platform;
furthermore, a plurality of composite cable body connecting structures are arranged on the cable body of the composite cable;
further, the composite cable body connection structure includes: the cable body connecting device comprises a watertight structure, a cable body connecting device bolt, a cable body connecting device shackle and a cable body connecting sheath;
furthermore, the cable body connecting sheath is sleeved outside the cable body of the composite cable, and two ends of the cable body connecting sheath are tightly connected through the watertight connector;
furthermore, the shackle of the cable body connecting device is fixedly connected with the cable body connecting sheath in a welding mode;
further, the cable body connecting device shackle is connected with the sacrificial anode protecting frame through a cable body connecting device bolt;
furthermore, the composite cable is connected with the sacrificial anode protection frame on the periphery of the damaged part of the ocean floating platform through the composite cable body connecting structure, so that the composite cable can enclose the damaged part and repair the damaged part.
A method for repairing an impressed current cathodic protection local repair device of a floating platform comprises the following steps:
A. monitoring the integral potential of the platform by a potential monitor arranged on the ocean floating platform, wherein the monitoring point is a potential detection sensor which is not worth on the platform, and feeding back information in real time by potential detection software; when the platform potential does not meet the specification requirement of-800 mV to-1150 mV (Ag/AgC1), the potential monitor gives an alarm, the software judges a potential failure area through calculation, and personnel or ROV enter water for inspection, determines the falling position of the sacrificial anode or the anticorrosive coating, and arranges a repairing device around the sacrificial anode or the anticorrosive coating;
B. connecting one end of the designed composite cable to an internal core wire of the composite cable in the waterproof junction box, and respectively connecting the internal core wire of the composite cable to a current control device and a potential detector; the cable bearing main body is wound on the pay-off device, and the other end of the cable bearing main body is connected to the sacrificial anode protection frame through the end part connecting structure;
C. connecting the wire connected with the mesh-shaped auxiliary anode in the composite cable with the anode of the current control equipment; the wire connected with the reference electrode in the composite cable is connected with a reference electrode terminal on the potential detector; electrifying the mesh-shaped auxiliary anode by using a current control device so as to realize impressed current cathodic protection on the platform;
D. the platform potential monitoring is carried out through a potential monitor installed on an ocean floating platform, a monitoring point is a potential detection sensor arranged on the platform, a reference electrode inside a reference electrode sealing structure connected with a composite cable can also be used as the monitoring point to be connected into the whole potential detection, the output size of the current control equipment to the network auxiliary anode electrified current is changed, the whole potential condition of the platform is fed back through software, and the repairing device is confirmed to take effect.
Compared with the prior art, the invention has the following advantages:
1. according to the impressed current cathodic protection local repair device and the repair method thereof for the floating platform, the composite cable repair device is arranged at the local corrosion reinforced part of the original cathodic protection system caused by special conditions, so that the local repair effect is realized, and the aim of accurate repair is fulfilled;
2. according to the impressed current cathodic protection local repair device and the repair method of the floating platform, the potential monitoring software is utilized on the platform to analyze the area to be repaired, and the composite cable, the auxiliary anode and the reference electrode are installed and distributed on the deck, so that the operation risk is reduced, and the purpose of ensuring the personal safety of operators is achieved;
3. according to the impressed current cathodic protection local repair device and the repair method of the floating platform, the simple and reliable end part structural form is designed at the end part of the composite cable, the existing sacrificial anode supporting legs of the platform are skillfully utilized as end part connection, the underwater operation time is greatly reduced, and the purpose of reducing the operation cost is achieved.
In conclusion, the technical scheme of the invention solves the problem that in the prior art, because the position of the area to be repaired with a complex ocean platform structure is uncertain and the protection current required by the area to be repaired is different, a cathode protection repair system device which can be flexibly arranged needs to be designed according to the actual damage condition.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a front view of the present invention;
FIG. 2 is a side view of the present invention;
FIG. 3 is a cross-sectional view of a composite cable of the present invention;
FIG. 4 is a schematic structural view of the connection structure of the end of the composite cable according to the present invention;
FIG. 5 is a view of the composite cable end connection structure A-A of the present invention;
FIG. 6 is a schematic structural diagram according to embodiment 3 of the present invention;
FIG. 7 is an enlarged view of section B of FIG. 6 in accordance with the present invention;
FIG. 8 is a schematic structural diagram of a composite cable body connection structure according to the present invention;
FIG. 9 is a view B-B of FIG. 8 of the present invention.
In the figure: 1. the device comprises a paying-off device 2, a current control device 3, a waterproof junction box 4, a potential detector 5, a composite cable 6, an ocean floating platform deck 7, an ocean floating platform 8, a current detection sensor 9, a potential detection sensor 10, a watertight connector 11, a reference electrode sealing structure 12, a reference electrode 13, a sacrificial anode 14, a net-shaped auxiliary anode 15, a net-shaped auxiliary anode sealing structure 16, a composite cable end connecting structure 17, a sacrificial anode protecting frame 18, a cable hypochlorous acid-resistant outer sheath 19, a reinforcement 20, a signal core power core 21, an inner layer filler 22, a tensile element 23, an inner sheath 24, an armor layer 25, a tail end connecting device bolt 26, a tail end connecting device shackle 27, a tail end connecting device sheath 28, epoxy resin sealant 29, a potential detector 5, a composite cable 6, an ocean floating platform deck 7, a current detection sensor 9, a potential detection sensor 10, a watertight connectors 11, a reference electrode sealing structure 12, a reference electrode sealing structure 13, a sacrificial anode 14, a net-shaped auxiliary anode sealing structure 16, a composite cable end connecting structure 17, a tail end connecting device bolt 26, a tail end connecting device shackle 27, a tail end connecting device sheath 28, a tail end connecting structure, a waterproof connector, a, The cable body connecting structure comprises a composite cable body connecting structure 30, a cable body connecting device shackle 31, a cable body connecting device bolt 32, a cable body connecting sheath 33 and an injury part.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative 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 a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in the figure, the invention provides an impressed current cathodic protection local repair device of a floating platform, which comprises: the device comprises a waterproof junction box 3, a potential detector 4, an ocean floating platform deck 6, an ocean floating platform 7, a current detection sensor 8, a potential detection sensor 9, a sacrificial anode 13 and a sacrificial anode protection frame 17; the waterproof junction box 3 is fixed on an ocean floating platform deck 6 on the upper part of an ocean floating platform 7 through an attached plate, and a potential detector 4 is arranged in the waterproof junction box; a potential detection sensor 9 is arranged in the ocean floating platform 7, and a current detection sensor 8 and a sacrificial anode 13 are arranged at the bottom of the ocean floating platform; the bottom of the ocean floating platform 7 is also provided with a sacrificial anode protection frame 17 which is positioned outside the sacrificial anode 13 and used for protecting the sacrificial anode from collision;
impressed current cathodic protection local prosthetic devices of floating platform still includes: the current control device 2, the reference electrode 12 of the composite cable 5 and the net-shaped auxiliary anode 14; the current control device 2 is arranged inside the waterproof junction box 3; the reticular auxiliary anode 14 and the reference electrode 12 are arranged outside the ocean floating platform 7, are respectively fixed on the composite cable 5 through the auxiliary anode sealing structure 15 and the reference electrode sealing structure 11, and are connected with the wires inside the composite cable 5 through wires; the composite cable 5 is wound on a pay-off device 1 arranged on a deck 6 of the ocean floating platform, and the pay-off device 1 is used for collecting the composite cable 5; the head end of the composite cable 5 enters the interior of the waterproof junction box 3 and is electrically connected with the current control device 2, and the tail end of the composite cable is connected to the sacrificial anode protection frame 17 through the composite cable end connecting structure 16.
The composite cable 5 comprises a hypochlorous acid resistant cable outer sheath 18, a reinforcing part 19, a signal core power core wire 20, an inner layer filler 21, a tensile element 22, an inner sheath 23 and an armor layer 24; the composite cable is characterized in that a tensile element 22 is arranged in the center of the cross section of the composite cable, an inner sheath 23 and a signal core power core wire 20 are arranged outside the tensile element 22, inner filler 23 is wrapped outside the core wire, an armor layer 24 and a hypochlorous acid resistant outer sheath 18 are arranged outside the core wire, and a reinforcing piece 19 is arranged in the armor layer 24 and the hypochlorous acid resistant outer sheath 18.
The composite cable 5 is provided with a sealing device with a waterproof function, and a reference electrode 12 and a reticular auxiliary anode 14 are arranged in the sealing device; the impressed current cathodic protection local repair device for the ocean floating platform 7 is applied when the integral cathodic protection is damaged due to the shedding of a sacrificial anode 13 or an anticorrosive coating which is preset and arranged by the sudden factors such as typhoons, ship collision and the like of the ocean floating platform 7. The composite cable 5 is laid to the periphery of the shedding of the sacrificial anode or the anticorrosive coating, and three reticular auxiliary anodes 14 and two reference electrodes 12 are arranged on the composite cable 5; the distance between two adjacent mesh-shaped auxiliary anodes 14 is 2-5 m, and a reference electrode 12 is arranged between two adjacent mesh-shaped auxiliary anodes 14.
The reference electrode 12 is connected with a terminal box of a data acquisition device on the potential detector 4 through a composite cable 5.
The negative pole of the current control device 2 is connected with the ocean floating platform 7 through a grounding wire, and the positive pole is connected with the net-shaped auxiliary anode 14 through the composite cable 5.
The water pressure resistance strength of the reticular auxiliary anode sealing structure 15 and the reference electrode sealing structure 11 is more than 1.6 Mpa.
The mesh-shaped auxiliary anode 14 is in a mesh cylinder shape and is sleeved on the cable; one end of the mesh-shaped auxiliary anode 14 is welded with a conductive column and connected into the mesh-shaped auxiliary anode watertight structure 15.
The waterproof junction box 3 is provided with a plurality of mounting holes, the composite cable 5 is connected into the waterproof junction box 3 through the mounting holes, and other wires such as a ground wire can be arranged in and out of the other mounting holes; a watertight joint 10 is provided between the mounting hole and the electric wire.
The composite cable end connection structure 16 includes: a tail end connecting device bolt 25, a tail end connecting device shackle 26, a connecting device sheath 27 and epoxy resin sealant 28; the tail-end connector shackle 26 and the connector sheath 27 are both made of stainless steel material; one end of the connecting device sheath 27 is welded with the tail end connecting device shackle 26, and the other end is connected with the composite cable 5 through the watertight connector 10; epoxy resin sealant 28 is filled between the connecting device sheath 27 and the composite cable 5; the trailing end connector shackle 26 is connected to the sacrificial anode protection frame 17 by a trailing end connector bolt 25.
A plurality of sacrificial anode protection frames 17 are arranged at different positions of the ocean floating platform 7; a plurality of composite cable body connecting structures 29 are arranged on the cable body of the composite cable 5; the composite cable body connection structure 29 includes: a watertight structure 10, a cable body connecting device bolt 31, a cable body connecting device shackle 30 and a cable body connecting sheath 32; the cable body connecting sheath 32 is sleeved outside the cable body of the composite cable 5, and two ends of the cable body connecting sheath are tightly connected through the watertight connector 10; the cable body connecting device shackle 30 is fixedly connected with the cable body connecting sheath 32 in a welding mode; the cable body connecting device shackle 30 is connected with the sacrificial anode protection frame 17 through a cable body connecting device bolt 31; the composite cable 5 is connected with the sacrificial anode protection frame 17 on the periphery of the damaged part of the ocean floating platform 7 through the composite cable body connecting structure 29, so that the composite cable can enclose the damaged part and repair the damaged part.
A method for repairing an impressed current cathodic protection local repair device of a floating platform comprises the following steps:
A. monitoring the integral potential of the platform by a potential monitor 4 arranged on an ocean floating platform 7, wherein the monitoring point is a potential detection sensor 9 which is not worth of on the platform, and feeding back information in real time by potential detection software; when the platform potential does not meet the specification requirement of-800 mV to-1150 mV (Ag/AgC1), the potential monitor 4 gives an alarm, the software judges a potential failure area through calculation, and personnel or ROV enter water for inspection, determines the falling position of the sacrificial anode 13 or the anticorrosive coating, and arranges a repairing device around the falling position;
B. connecting one end of the designed composite cable to the inner core wire of the composite cable in the waterproof junction box 3, and respectively connecting the inner core wire of the composite cable to the current control equipment 2 and the potential detector 4; the cable bearing main body is wound on the pay-off device 1, and the other end of the cable bearing main body is connected to the sacrificial anode protection frame 17 through the end connecting structure 16;
C. connecting the wire connected with the mesh-shaped auxiliary anode 14 in the composite cable 5 with the anode of the current control device 2; the wire connected with the reference electrode 12 in the composite cable 5 is connected with a reference electrode terminal on the potential detector 4; electrifying the mesh-shaped auxiliary anode 14 by using the current control device 2 so as to realize impressed current cathodic protection on the platform;
D. the platform potential monitoring is carried out through a potential monitor 4 installed on an ocean floating platform 7, a monitoring point is a potential detection sensor 9 arranged on the platform, a reference electrode inside a reference electrode sealing structure 11 connected with a composite cable 5 can also be connected into the whole potential detection as the monitoring point, the output size of the current control device 2 to the electrified current of the network auxiliary anode 14 is changed, the whole potential condition of the platform is fed back through software, and the effect of the repairing device is confirmed.
Example 1
The sacrificial anode fails due to ship collision, depletion of the anode itself or the surface of the sacrificial anode filled with marine organisms;
the reliability of the device is verified by carrying out a simulated actual sea state test on the scaling model and controlling the connection and disconnection of the sacrificial anode and the model platform by changing the electrical connection between the sacrificial anode and the model platform so as to simulate the shedding condition of the sacrificial anode. The concrete repairing steps are as follows:
1. monitoring the integral potential of the platform by a potential monitor 4 arranged on an ocean floating platform 7, finding that the potential near a sacrificial anode of the platform is-950 mV (Ag/AgCl) at the moment through real-time feedback information of potential monitoring software, electrically connecting and disconnecting the sacrificial anode and the platform, finding that the potential near the sacrificial anode is-745 mV (Ag/AgCl), judging that the sacrificial anode fails at the moment, and arranging a repairing device around the sacrificial anode;
2. one end of a designed composite cable is connected into a waterproof junction box 3, and core wires inside the composite cable are respectively connected to a current control device 2 and a potential detector 4; the cable bearing main body is wound on the pay-off device 1, and the other end of the cable bearing main body is connected to a sacrificial anode protection frame 17 near the failed sacrificial anode through an end connecting structure 16;
3. connecting the wire connected with the mesh-shaped auxiliary anode 14 in the composite cable 5 with the anode of the current control device 2; the wire connected with the reference electrode 12 in the composite cable 5 is connected with a reference electrode terminal on the potential detector 4; electrifying the reticular auxiliary anode 14 by using the current control equipment 2 to carry out impressed current cathodic protection on the coating damage, thereby further carrying out impressed current cathodic protection on the platform;
4. the change in the platform potential is judged by setting a current gradient of 100mA to 1200mA by modifying the amount of energization of the mesh-like auxiliary anode 14 by the current control device 2.
5. The platform potential is monitored by a potential monitor 4 arranged on an ocean floating platform 7, the monitoring point is a potential detection sensor 9 arranged on the platform, and a reference electrode in a reference electrode sealing structure 11 connected with the composite cable 5 can also be used as the monitoring point to be connected into the whole potential detection; the test result shows that: under the condition that the sacrificial anode falls off (the damage rate of the coating is set to be 0%), the current is emitted by increasing the net-shaped auxiliary anode to simulate different potential gradients, and the potential (Ag/AgCl) of the electrode near the failed sacrificial anode is remarkably reduced from-745 mV to-1180 mV along with the increase of the potential gradient from 100mA to 1200mA, so that the experimental expectation is met, and the device is real and reliable.
Example 2
The local coating at a certain part on the surface of the floating platform is damaged due to ship collision, self aging and shedding of the coating and ultra-large typhoon;
the actual sea condition test is simulated by the scaling model, the damage rate of the platform is assumed to be 32% preliminarily, and the platform falls off in a large area to verify the reliability of the device. The concrete repairing steps are as follows:
1. at the moment, the whole platform potential is monitored by a potential monitor 4 arranged on the ocean floating platform 7, and information is fed back in real time by potential monitoring software. When the full-platform potential is found to be distributed between-700 mV to-750 mV, the potential monitor 4 gives an alarm, software judges the damaged position of the coating through calculation, personnel enter water to check, the damaged condition of the coating is determined, and a repairing device is arranged around the damaged position.
2. One end of a designed composite cable is connected to the waterproof junction box 3, and core wires inside the composite cable are respectively connected to the current control equipment 2 and the potential detector 4. The cable bearing main body is wound on the pay-off device 1, and the other end of the cable bearing main body is connected to a sacrificial anode protection frame 17 near the local coating damage through an end connecting structure 16;
3. connecting the wire connected with the mesh-shaped auxiliary anode 14 in the composite cable 5 with the anode of the current control device 2; the wire connected with the reference electrode 12 in the composite cable 5 is connected with a reference electrode terminal on the potential detector 4; electrifying the reticular auxiliary anode 14 by using the current control equipment 2 to carry out impressed current cathodic protection on the coating damage, thereby further carrying out impressed current cathodic protection on the platform;
4. the change in the platform potential is judged by setting a current gradient of 100mA to 1200mA by modifying the amount of energization of the mesh-like auxiliary anode 14 by the current control device 2.
5. The platform potential is monitored by a potential monitor 4 arranged on an ocean floating platform 7, a monitoring point is a potential detection sensor 9 arranged on the platform, and a reference electrode in a reference electrode sealing structure 11 connected with the composite cable 5 can also be connected into the whole potential detection as the monitoring point. The test result shows that: under the same condition of the coating damage rate (the coating damage rate is set to be 32%), the current is emitted by increasing the net-shaped auxiliary anode to simulate different potential gradients, and the model electrode potential (Ag/AgCl) is remarkably reduced from-707.25 mV to-1068 mV on average and from-625 mV to-1142 mV around the coating damage point along with the increase of the potential gradient from 100mA to 1200mA, so that the experimental expectation is met, and the device is real and reliable.
Example 3
The local coating at a certain part on the surface of the floating platform is damaged due to ship collision, self aging and shedding of the coating and ultra-large typhoon; the sacrificial anode fails due to ship collision, depletion of the anode itself, or flooding of the sacrificial anode surface with marine life.
The method includes the steps that a scaling model is subjected to an actual sea condition simulation test, the damage rate of a platform is preliminarily assumed to be 4%, not only is a local small area dropped off, but also a sacrificial anode of the test platform is closed, namely the sacrificial anode fails, so that the reliability of the device is verified; the concrete repairing steps are as follows:
1. at the moment, the integral potential of the platform is monitored by a potential monitor 4 arranged on the ocean floating platform 7, and information is fed back in real time by potential monitoring software; when the full-platform potential is found to be distributed between-710 mV to-745 mV, the potential monitor 4 alarms, the software judges the failure reason through calculation, and judges that the sacrificial anode has failed according to the potential condition near the sacrificial anode; through personnel or ROV water-entry inspection, the damaged position of the coating is judged, the damaged condition of the coating is determined, and repair devices are arranged around the failure of the sacrificial anode and the damaged condition of the coating;
2. one end of a designed composite cable is connected into a waterproof junction box 3, and core wires inside the composite cable are respectively connected to a current control device 2 and a potential detector 4; the cable bearing main body is wound on the pay-off device 1, and the other end of the cable bearing main body is connected to a sacrificial anode protection frame 17 near the local coating damage through an end connecting structure 16; the cable carrier body can then be provided with a plurality of composite cable body connection structures 29, so that the composite cable surrounds all locally damaged parts; arranging an auxiliary anode and a reference electrode at the positions where the sacrificial anode fails and the coating is damaged;
3. connecting the wire connected with the mesh-shaped auxiliary anode 14 in the composite cable 5 with the anode of the current control device 2; the wire connected with the reference electrode 12 in the composite cable 5 is connected with a reference electrode terminal on the potential detector 4; electrifying the reticular auxiliary anode 14 by using the current control equipment 2 to carry out impressed current cathodic protection on the coating damage, thereby further carrying out impressed current cathodic protection on the platform;
4. the change of the platform potential is judged by modifying the current control device 2 to respectively set the current gradient of 100mA to 1200mA for the energization amount of different mesh-shaped auxiliary anodes 14;
5. platform potential monitoring is carried out through a potential monitor 4 arranged on an ocean floating platform 7, monitoring points are potential detection sensors 9 arranged on the platform, and a reference electrode in a reference electrode sealing structure 11 connected with a composite cable 5 can also be used as the monitoring points to be connected into overall potential detection; the test result shows that: in this case, by applying different potential gradients to the auxiliary anode in the vicinity of the failed sacrificial anode, it was found that the electrode potential (Ag/AgCl) in the vicinity of the sacrificial anode decreased significantly from-747 mV to-1148 mV as the potential gradient increased from 0mA to 1000mA, and by applying different potential gradients to the auxiliary anode in the vicinity of the coating failure, it was found that the potential around the point of failure of the coating decreased significantly from-825 mV to-1115 mV as the potential gradient increased from 0mA to 200mA, in accordance with experimental expectations, and the device was truly reliable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An impressed current cathodic protection local remediation device for a floating platform, comprising: the device comprises a waterproof junction box (3), a potential detector (4), an ocean floating platform deck (6), an ocean floating platform (7), a current detection sensor (8), a potential detection sensor (9), a sacrificial anode (13) and a sacrificial anode protection frame (17);
the waterproof junction box (3) is arranged on an ocean floating platform deck (6) at the upper part of an ocean floating platform (7), and a potential detector (4) is arranged in the waterproof junction box;
a potential detection sensor (9) is arranged in the ocean floating platform (7), and a current detection sensor (8) and a sacrificial anode (13) are arranged at the bottom of the ocean floating platform;
the bottom of the ocean floating platform (7) is also provided with a sacrificial anode protection frame (17) which is positioned outside the sacrificial anode (13) and used for protecting the sacrificial anode from collision;
the method is characterized in that: the impressed current cathodic protection local prosthetic devices of floating platform still include: the device comprises a current control device (2), a composite cable (5), a reference electrode (12) and a mesh-shaped auxiliary anode (14);
the current control equipment (2) is arranged inside the waterproof junction box (3);
the reticular auxiliary anode (14) and the reference electrode (12) are arranged outside the ocean floating platform (7), are respectively fixed on the composite cable (5) through an auxiliary anode sealing structure (15) and a reference electrode sealing structure (11), and are connected with wires inside the composite cable (5) through wires;
the composite cable (5) is wound on a pay-off device (1) arranged on a deck (6) of the ocean floating platform, and the pay-off device (1) is used for winding and unwinding the composite cable (5);
the head end of the composite cable (5) enters the interior of the waterproof junction box (3) and is electrically connected with the current control device (2), and the tail end of the composite cable is connected to the sacrificial anode protection frame (17) through the composite cable end connecting structure (16);
a plurality of sacrificial anode protection frames (17) are arranged at different positions of the ocean floating platform (7);
a plurality of composite cable body connecting structures (29) are arranged on the cable body of the composite cable (5);
the composite cable body connecting structure (29) comprises: the cable body connecting device comprises a watertight structure (10), a cable body connecting device bolt (31), a cable body connecting device shackle (30) and a cable body connecting sheath (32);
the cable body connecting sheath (32) is sleeved outside the cable body of the composite cable (5), and two ends of the cable body connecting sheath are tightly connected through the watertight connector (10);
the shackle (30) of the cable body connecting device is fixedly connected with a cable body connecting sheath (32) in a welding mode;
the cable body connecting device shackle (30) is connected with the sacrificial anode protecting frame (17) through a cable body connecting device bolt (31);
the composite cable (5) is connected with a sacrificial anode protection frame (17) on the periphery of the damaged part of the ocean floating platform (7) through a composite cable body connecting structure (29), so that the composite cable can enclose the damaged part and repair the damaged part.
2. Impressed current cathodic protection local remediation device of a floating platform according to claim 1, characterized in that:
the composite cable (5) is provided with a sealing device with a waterproof function, and the reference electrode (12) and the reticular auxiliary anode (14) are arranged in the sealing device;
the composite cable (5) is provided with N meshed auxiliary anodes (14) and N-1 reference electrodes (12); the distance between two adjacent mesh-shaped auxiliary anodes (14) is 2-5 m, and a reference electrode (12) is arranged between the two adjacent mesh-shaped auxiliary anodes (14).
3. Impressed current cathodic protection local remediation device of a floating platform according to claim 2, characterized in that:
the reference electrode (12) is connected with a terminal box of a data acquisition device on the potential detector (4) through a composite cable (5).
4. Impressed current cathodic protection local remediation device of a floating platform according to claim 1, characterized in that:
the negative pole of the current control device (2) is connected with the ocean floating platform (7) through a grounding wire, and the positive pole is connected with the net-shaped auxiliary anode (14) through the composite cable (5).
5. Impressed current cathodic protection local remediation device of a floating platform according to claim 2, characterized in that:
the water pressure resistance strength of the reticular auxiliary anode sealing structure (15) and the reference electrode sealing structure (11) is more than 1.6 Mpa.
6. Impressed current cathodic protection local remediation device of a floating platform according to claim 4, characterized in that:
the mesh-shaped auxiliary anode (14) is in a mesh cylinder shape and is sleeved on the cable; one end of the reticular auxiliary anode (14) is welded with a conductive column and connected into the reticular auxiliary anode watertight structure (15).
7. Impressed current cathodic protection local remediation device of a floating platform according to claim 1, characterized in that:
the waterproof junction box (3) is provided with a plurality of mounting holes, the composite cable (5) is connected into the waterproof junction box (3) through the mounting holes, and other wires such as a ground wire can be arranged in and out of the other mounting holes;
and a watertight joint (10) is arranged between the mounting hole and the electric wire.
8. Impressed current cathodic protection local remediation device of a floating platform according to claim 1, characterized in that:
the composite cable end connection structure (16) comprises: a tail end connecting device bolt (25), a tail end connecting device shackle (26), a connecting device sheath (27) and epoxy resin sealant (28);
the tail end connecting device shackle (26) and the connecting device sheath (27) are both made of stainless steel materials;
one end of the connecting device sheath (27) is welded with the tail end connecting device shackle (26), and the other end is connected with the composite cable (5) through the watertight connector (10);
epoxy resin sealant (28) is filled between the connecting device sheath (27) and the composite cable (5);
the tail end connecting device shackle (26) is connected with the sacrificial anode protecting frame (17) through a tail end connecting device bolt (25).
9. A method for repairing an impressed current cathodic protection local repair device of a floating platform is characterized by comprising the following steps:
91. the integral potential of the platform is monitored by a potential monitor (4) arranged on an ocean floating platform (7), the monitoring point is a potential detection sensor (9) which is not worth of on the platform, and information is fed back in real time by potential detection software; when the platform potential does not meet the specification requirement of-800 mV to-1150 mV (Ag/AgC1), the potential monitor (4) gives an alarm, software judges a potential failure area through calculation, personnel or ROV enter water for inspection, determines the falling position of the sacrificial anode (13) or the anticorrosive coating, and arranges a repairing device around the falling position;
92. connecting one end of the designed composite cable to the inner core wire of the composite cable in the waterproof junction box (3) and respectively connecting the inner core wire of the composite cable to the current control equipment (2) and the potential detector (4); the cable bearing main body is wound on the pay-off device (1), and the other end of the cable bearing main body is connected to the sacrificial anode protection frame (17) through an end connecting structure (16);
93. connecting the wire connected with the mesh-shaped auxiliary anode (14) in the composite cable (5) with the anode of the current control device (2); the wire connected with the reference electrode (12) in the composite cable (5) is connected with a reference electrode terminal on the potential detector (4); electrifying the mesh-shaped auxiliary anode (14) by using the current control equipment (2) so as to realize impressed current cathodic protection on the platform;
94. the platform potential monitoring is carried out through a potential monitor (4) installed on an ocean floating platform (7), a monitoring point is a potential detection sensor (9) arranged on the platform, a reference electrode inside a reference electrode sealing structure (11) connected with a composite cable (5) can also be connected into the whole potential detection as the monitoring point, the output size of the current control equipment (2) to the electrified current of a network auxiliary anode (14) is changed, the whole potential condition of the platform is fed back through software, and the repairing device is confirmed to take effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265460.3A CN113981454B (en) | 2021-10-28 | 2021-10-28 | Impressed current cathodic protection local repair device and repair method of floating platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265460.3A CN113981454B (en) | 2021-10-28 | 2021-10-28 | Impressed current cathodic protection local repair device and repair method of floating platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113981454A CN113981454A (en) | 2022-01-28 |
| CN113981454B true CN113981454B (en) | 2022-08-05 |
Family
ID=79743713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111265460.3A Active CN113981454B (en) | 2021-10-28 | 2021-10-28 | Impressed current cathodic protection local repair device and repair method of floating platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113981454B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115537818B (en) * | 2022-10-11 | 2024-05-28 | 山东大学 | Impressed current cathodic protection method for gearless mooring chain structure |
| CN117214076B (en) * | 2023-09-14 | 2024-05-14 | 大连理工大学 | Comprehensive analysis device and monitoring method for corrosion state of marine structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103060815A (en) * | 2012-12-24 | 2013-04-24 | 青岛钢研纳克检测防护技术有限公司 | Jacket platform far anode type corrosion control device and use method thereof |
| WO2013149300A1 (en) * | 2012-04-06 | 2013-10-10 | Silicon Controls Pty Ltd | Cathodic protection monitoring method, system and components |
| CN103726057A (en) * | 2013-12-31 | 2014-04-16 | 一重集团大连设计研究院有限公司 | Corrosion resistant system and method of offshore wind power generating set base |
| CN104278277A (en) * | 2014-09-28 | 2015-01-14 | 中国海洋石油总公司 | Sacrificial anode heap for rapidly repairing cathode protection |
| CN207738843U (en) * | 2018-01-09 | 2018-08-17 | 大连科迈尔防腐科技有限公司 | A kind of ocean platform tension type impressed current cathodic protection system |
-
2021
- 2021-10-28 CN CN202111265460.3A patent/CN113981454B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013149300A1 (en) * | 2012-04-06 | 2013-10-10 | Silicon Controls Pty Ltd | Cathodic protection monitoring method, system and components |
| CN103060815A (en) * | 2012-12-24 | 2013-04-24 | 青岛钢研纳克检测防护技术有限公司 | Jacket platform far anode type corrosion control device and use method thereof |
| CN103726057A (en) * | 2013-12-31 | 2014-04-16 | 一重集团大连设计研究院有限公司 | Corrosion resistant system and method of offshore wind power generating set base |
| CN104278277A (en) * | 2014-09-28 | 2015-01-14 | 中国海洋石油总公司 | Sacrificial anode heap for rapidly repairing cathode protection |
| CN207738843U (en) * | 2018-01-09 | 2018-08-17 | 大连科迈尔防腐科技有限公司 | A kind of ocean platform tension type impressed current cathodic protection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113981454A (en) | 2022-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113981454B (en) | Impressed current cathodic protection local repair device and repair method of floating platform | |
| CA1123785A (en) | Impressed current rope anodes | |
| CN201722427U (en) | Jacket impressed current cathode protection device | |
| CN204298462U (en) | Drawing impressed current anode | |
| US3038849A (en) | Insoluble trailing anode for cathodic protection of ships | |
| CN108118343A (en) | The impressed current of jacket platform and sacrificial anode Combined Protection device and method | |
| US4740106A (en) | Impressed current cathodic protection of off-shore platforms utilizing the tensioned anode ropes system | |
| CN207738843U (en) | A kind of ocean platform tension type impressed current cathodic protection system | |
| CN105552821A (en) | Water proofing type underwater cable connecting method | |
| CN112281164A (en) | Stretching impressed current cathodic protection device and use method thereof | |
| CN214736099U (en) | Stretching impressed current cathodic protection device | |
| CN102268679A (en) | Corrosion protection system for offshore steel structures and a method for its application | |
| CN111893491B (en) | Jacket tensioning type anti-corrosion system and installation method | |
| EP3594411A2 (en) | Anode structure for an offshore foundation, and a method of reducing corrosion in an offshore foundation | |
| CN109338374B (en) | Cathode protection device | |
| CN116315944A (en) | Cathode protection quick repair device and repair method based on underwater pluggable electric connector | |
| WO2017039017A1 (en) | Cable cover damage location detection method and cable cover damage location detection device | |
| CN114023500B (en) | Mesh auxiliary anode and reference electrode composite cable device for floating platform | |
| CN207904371U (en) | The impressed current and sacrificial anode Combined Protection device of jacket platform | |
| CN218969371U (en) | Marine wind power integrated auxiliary anode string structure | |
| CN218478803U (en) | Tensioning type impressed current cathodic protection and monitoring integrated device | |
| CN104265050A (en) | Tower column for fast first-aid repair | |
| RU2768061C1 (en) | Method for installation of underwater anodes for cathodic protection of underwater objects | |
| CN114318348B (en) | Oblique-pulling type impressed current cathode protection device and method | |
| CN219297647U (en) | Temporary cathode protection system for offshore wind power |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |