Underwater maintainable corrosion protection system

Abstract

The utility model discloses a corrosion protection system capable of being maintained underwater. Comprising a multi-path control device arranged on a platform deck, a cathode cable assembly, an anode cable assembly, an underwater watertight connecting assembly connected with the anode cable assembly, an auxiliary anode assembly detachably connected with the underwater watertight connecting assembly, and a supporting assembly. The input end of the cathode cable assembly is connected with the cathode of the multipath control equipment, the output end of the cathode cable assembly is connected with the platform deck, the input end of the anode cable assembly is connected with the anode of the multipath control equipment, and the output end of the anode cable assembly is connected with the cathode of the multipath control equipment. The auxiliary anode assembly is arranged on the supporting assembly, and the supporting assembly and the auxiliary anode assembly are arranged in an insulated mode. According to the system, corrosion protection of the target steel framework can be achieved, safe and convenient disassembly, assembly and maintenance of underwater parts are achieved through the underwater watertight connecting assembly and the detachable auxiliary anode assembly, and reliability is high.

Description

Technical Field

[0001] The present disclosure relates to the technical field of marine engineering equipment protection, and in particular to an underwater maintainable corrosion protection system. Background Art

[0002] In offshore oil and offshore wind power development projects, it is necessary to build various platforms such as oil production platforms, living platforms, central processing platforms, wind power platforms, offshore wind power booster stations, etc. The platform generally includes: marine engineering modules, underwater support structures - jackets and risers and other marine engineering structures, which are generally steel structures. Since seawater is a very corrosive medium, if effective anti-corrosion measures are not taken, the steel marine jacket will be severely corroded; jacket corrosion will shorten the service life of the platform and increase the cost of platform maintenance and repair. Underwater steel structure cathodic protection corrosion control technology includes sacrificial anode method and impressed current method.

[0003] As the sea area gradually deepens and the structure of the conductor frame becomes more and more complex, the cost of large conductor frames has increased significantly; the sacrificial anode method cathodic protection system disclosed in the prior art requires the use of a large amount of aluminum alloy materials, which increases the load on the conductor frame and affects the stability and life of use; at the same time, the dissolution of the sacrificial anode will release a large amount of Al, Zn, In, Mg and other heavy metal ions, which may cause potential pollution hazards to the marine ecosystem when entering the marine environment. The smelting of anodes consumes a huge amount of resources and energy, and the discharge of a large amount of polluted waste causes serious ecological pollution and damage to the air, water and soil.

[0004] At the same time, the impressed current cathodic protection (ICCP) system of the conductor frame faces some challenges in practical application. The fixed ICCP system requires the underwater welding of a large number of bases and cable protection pipes, which leads to large construction workload and high cost, and increases the structural load of the conductor frame. In addition, underwater welding operations are high-risk, may have a negative impact on the marine environment, and are difficult to maintain and overhaul. Fixed systems also have technical limitations, poor flexibility, and are difficult to upgrade and expand. The resistance loss problem will also affect the system efficiency. Utility Model Content

[0005] In view of this, the embodiments of the present disclosure provide an underwater maintainable corrosion protection system, which at least partially solves the problems existing in the prior art of underwater protection systems such as difficulty in construction, maintenance, and high cost.

[0006] In a first aspect, an embodiment of the present disclosure provides an underwater maintainable corrosion protection system, comprising:

[0007] Multi-channel control equipment installed on the platform deck;

[0008] Cathode cable assembly; the input end of the cathode cable assembly is connected to the negative electrode of the multi-channel control device, and the output end is connected to the platform deck;

[0009] an anode cable assembly; the input end of the anode cable assembly is connected to the positive electrode of the multi-channel control device;

[0010] An underwater watertight connection assembly connected to the anode cable assembly;

[0011] an auxiliary anode assembly detachably connected to the underwater watertight connection assembly;

[0012] A support assembly installed in the target catheter area; the auxiliary anode assembly is installed on the support assembly, and the support assembly is insulated from the auxiliary anode assembly;

[0013] A signal cable assembly connected to the terminals of the multi-channel control device;

[0014] A dual reference electrode assembly is connected to the signal cable assembly.

[0015] Optionally, the support assembly includes a first mounting assembly, a second mounting assembly, and a mounting rope disposed between the first mounting assembly and the second mounting assembly;

[0016] The first mounting assembly is mounted in the first conduit region;

[0017] The second mounting assembly is mounted in the second conduit region;

[0018] The auxiliary anode assembly is fixedly connected to the installation rope via a plurality of fixing members.

[0019] Optionally, the first installation assembly includes a first cable knot head, a first shackle and a first lifting ear, one end of the first cable knot head is connected to one end of the installation rope, and the other end of the first cable knot head is connected to one end of the first lifting ear through the first shackle; the other end of the first lifting ear is fixedly connected to the first conduit area;

[0020] The second installation assembly comprises a second cable joint head, a second shackle, a second lifting ear and an anti-corrosion block, wherein the anti-corrosion block is installed on the second cable joint head;

[0021] One end of the second cable joint head is connected to the other end of the installation rope, and the other end of the second cable joint head is connected to one end of the second lifting ear through the second shackle; the other end of the second lifting ear is fixedly connected to the second catheter area.

[0022] Optionally, the first installation assembly further includes a first spare connection assembly, the first spare connection assembly includes a first spare anchor chain and a first spare lifting eye, one end of the first spare anchor chain is connected to the first shackle, and the other end is connected to the first spare lifting eye; the first spare lifting eye is fixedly connected to the first conduit area, and the first spare lifting eye is installed at a different position from the first lifting eye, and the first spare anchor chain is tilted relative to the installation rope;

[0023] The second installation assembly also includes a second spare connection assembly, which includes a second spare anchor chain and a second spare lifting ear, one end of the second spare anchor chain is connected to the second shackle, and the other end is connected to the second spare lifting ear; the second spare lifting ear is fixedly connected to the second conduit area, and the second spare lifting ear is installed at a different position from the second lifting ear, and the second spare anchor chain is inclined relative to the installation rope 380.

[0024] Optionally, the second backup connection component and the first backup connection component are arranged on the same side of the installation rope;

[0025] A connecting anchor chain, a turnbuckle connector, and a third shackle are also provided between the second shackle and the second lifting ear. One end of the connecting anchor chain is connected to the second shackle, and the other end is connected to the second lifting ear through the turnbuckle connector and the third shackle in sequence.

[0026] Optionally, the auxiliary anode assembly includes an underwater auxiliary anode main cable and a plurality of auxiliary anode components arranged outside the underwater auxiliary anode main cable, the plurality of auxiliary anode components are electrically connected to the underwater auxiliary anode main cable, and the connection between each auxiliary anode component and the underwater auxiliary anode main cable is independently arranged;

[0027] The plurality of auxiliary anode members are fixed to the installation ropes through the plurality of fixing members respectively.

[0028] Optionally, the underwater watertight connection assembly includes a watertight outlet, a connector, a transition cable and a silicone hose, one end of the watertight outlet is connected to the anode cable assembly, and the other end is connected to one end of the transition cable; the other end of the transition cable is connected to one end of the connector, and the other end of the connector is connected to the underwater auxiliary anode main cable;

[0029] The silicone hose is installed on the outside of the watertight outlet, the connector and the transition cable, and the silicone hose, the watertight outlet and the connector are all sealed.

[0030] Optionally, the anode cable assembly includes a first anode cable assembly, a first wiring device and a second anode cable assembly, wherein the first wiring device is installed in the first cable walkway area, and the second anode cable assembly is arranged inside the steel structure;

[0031] The input end of the first anode cable assembly is connected to the positive electrode of the multi-channel control device, and the output end of the first anode cable assembly is connected to the input end of the second anode cable assembly through the first wiring device;

[0032] The output end of the two-anode cable assembly is connected to the watertight outlet.

[0033] Optionally, the signal cable assembly includes a first signal cable assembly, a second wiring device and a second signal cable assembly, the second wiring device is installed in the second cable walkway area, and the second signal cable assembly is arranged inside the steel structure;

[0034] The input end of the first signal cable assembly is connected to the terminal of the multi-channel control device, and the output end of the first signal cable assembly is connected to the input end of the second signal cable assembly through the second wiring device;

[0035] The output end of the second signal cable assembly is connected to the dual reference electrode assembly.

[0036] In a second aspect, the present application discloses an underwater maintainable corrosion protection system, comprising:

[0037] Multi-channel control equipment installed on the platform deck;

[0038] Cathode cable assembly; the input end of the cathode cable assembly is connected to the negative electrode of the multi-channel control device, and the output end is connected to the platform deck;

[0039] Multi-channel protection system; the multi-channel protection systems are all connected to the multi-channel control device, and the multi-channel protection systems are independent of each other, and the underwater protection parts of the multi-channel protection systems are distributed and arranged in different steel frame areas;

[0040] Each of the protection systems includes an anode cable assembly, an underwater watertight connection assembly connected to the anode cable assembly, an auxiliary anode assembly detachably connected to the underwater watertight connection assembly, a support assembly installed in the target catheter area, a signal cable assembly connected to the terminal of the multi-channel control device, and a dual reference electrode assembly connected to the signal cable assembly;

[0041] The input end of the anode cable assembly is connected to the positive electrode of the multi-channel control device;

[0042] The auxiliary anode assembly is mounted on the support assembly, and the support assembly is insulated from the auxiliary anode assembly.

[0043] The underwater maintainable corrosion protection system disclosed in the present application provides cathodic protection through the cathode cable assembly to prevent corrosion of the metal structure; through the anode cable assembly, the underwater watertight connection assembly, and the auxiliary anode assembly, the underwater cable can be sealed and protected, and the steel structure can be protected against corrosion within a preset range through the coordinated design of the support assembly and the auxiliary anode assembly; the signal cable assembly is used to transmit the signals and data required for monitoring and controlling the operating status of the system, and the dual reference electrode assembly is used to measure and monitor the potential difference in the system to ensure the effectiveness of the cathode and anode protection. Specifically, the cathode cable assembly and the anode cable assembly provide current to make the target steel structure a cathode, thereby inhibiting corrosion; the anode cable assembly and the auxiliary anode assembly are used to provide additional anode protection, especially for the structure inside the main pipe rack; the underwater watertight connection assembly and the detachable auxiliary anode assembly realize the safe disassembly and maintenance of the underwater components, which is convenient for system maintenance and updating. The system disclosed in the present application not only effectively protects the underwater structure from corrosion, but also realizes convenient operation and efficient maintenance underwater, ensuring long-term protection effect and safe operation.

[0044] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0046] Figure 1 A schematic structural diagram of an underwater maintainable corrosion protection system provided in an embodiment of the present disclosure.

[0047] Figure 2 A schematic diagram of the structure of a multi-channel control device provided in an embodiment of the present disclosure.

[0048] Figure 3 Schematic diagram of an anode cable assembly and a signal cable assembly provided in an embodiment of the present disclosure.

[0049] Figure 4 A schematic diagram of the structure of the underwater part provided in an embodiment of the present disclosure.

[0050] Figure 5 A schematic cross-sectional view of an auxiliary anode member provided in an embodiment of the present disclosure.

[0051] Description of reference numerals:

[0052] 1. Negative pole of multi-channel control equipment; 2. Positive pole of multi-channel control equipment; 3. Terminal of multi-channel control equipment; 100. Multi-channel control equipment; 110. Master control center; 120. Data acquisition instrument; 130. Constant potential instrument unit; 140. Temperature control device; 200. Cathode cable assembly; 210. Cathode cable; 220. Cathode bus base; 310. First anode cable assembly; 320. First wiring device; 321. First watertight wiring box; 322. First protection box; 330. Second anode cable assembly; 331. Watertight flexible cable; 332, first cable box; 333, first cable protection tube; 340, underwater watertight connection assembly; 341, watertight outlet; 342, connector; 343, silicone hose; 350, auxiliary anode assembly; 351, underwater auxiliary anode main cable; 352, auxiliary anode piece; 3521, connecting copper tube; 3522, cable clamping part; 3523, upper sealing component; 3524, lower sealing component; 360, first installation assembly; 361, first cable knot head; 362, first shackle; 363, first hanging lug; 364, first spare anchor chain; 365, first spare lifting lug; 370, second mounting assembly; 371, second cable segment; 372, second shackle; 373, second lifting lug; 374, connecting anchor chain; 375, turnbuckle connector; 376, third shackle; 377, second spare anchor chain; 378, second spare lifting lug; 379, anti-corrosion block; 380, extruded steel wire rope; 390, anode fixture; 410, first signal cable assembly; 420, second wiring device; 421, second watertight wiring box; 422, second Protection box; 430, second signal cable assembly; 431, second signal cable; 432, second cable box; 433, second cable protective tube; 440, dual reference electrode assembly; 441, steel core; 442, sacrificial anode; 443, insulating flange; 444, dual reference electrode; 445, anode current probe; 500, platform deck; 610, first cable walkway area; 620, second cable walkway area; 710, first conduit area; 720, second conduit area; 730, third conduit area; 800, main conduit rack. DETAILED DESCRIPTION

[0053] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0054] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure can be combined with each other. The technical solution of the present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0055] Unless otherwise specified, the exemplary embodiments / embodiments shown will be understood as providing exemplary features of various details of some ways in which the technical concept of the present disclosure can be implemented in practice. Therefore, unless otherwise specified, the features of the various embodiments / embodiments can be combined, separated, interchanged and / or rearranged without departing from the technical concept of the present disclosure.

[0056] The use of cross-hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0057] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0058] For descriptive purposes, the present disclosure may use spatially relative terms such as "under," "beneath," "under," "down," "over," "upper," "above," "higher," and "side (e.g., as in "sidewall")," to describe the relationship of one component to another (other) component as shown in the accompanying drawings. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, components described as "under" or "beneath" other components or features would subsequently be positioned "over" the other components or features. Thus, the exemplary term "under" can encompass both the "above" and "below" orientations. Furthermore, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0059] The terms used here are for the purpose of describing specific embodiments, and are not intended to be restrictive. As used here, unless the context clearly indicates otherwise, the singular forms "one (kind, person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise" and / or "include" and their variations are used in this specification, it is explained that there are stated features, integral bodies, steps, operations, parts, assemblies and / or their groups, but it is not excluded that there are or add one or more other features, integral bodies, steps, operations, parts, assemblies and / or their groups. It should also be noted that, as used here, the terms "substantially", "approximately" and other similar terms are used as approximate terms and not as degree terms, so that they are used to explain the inherent deviations of the measured values, calculated values ​​and / or the values ​​provided that will be recognized by those of ordinary skill in the art.

[0060] Reference Figure 1 and Figure 2The present application discloses an underwater maintainable corrosion protection system, comprising: a multi-channel control device 100, a cathode cable assembly 200, an anode cable assembly, an underwater watertight connection assembly 340, an auxiliary anode assembly 350, a support assembly, a signal cable assembly and a dual reference electrode assembly 440, wherein the multi-channel control device 100 is arranged on a platform deck 500 for controlling and monitoring the operation of the entire system; the input end of the cathode cable assembly is connected to the negative electrode 1 of the multi-channel control device, and the output end is connected to the platform deck; the input end of the anode cable assembly is connected to the positive electrode 2 of the multi-channel control device; the underwater watertight connection assembly 340 is connected to the anode cable assembly; the auxiliary anode assembly 350 is detachably connected to the underwater watertight connection assembly 340; the support assembly is installed in the target catheter area, the auxiliary anode assembly is mounted on the support assembly, and the support assembly is insulated from the auxiliary anode assembly; the signal cable assembly is connected to the terminal 3 of the multi-channel control device; the dual reference electrode assembly 440 is connected to the signal cable assembly.

[0061] Specifically, the anode cable assembly includes a first anode cable assembly 310 , a first wiring device 320 and a second anode cable assembly 330 . The first wiring device 320 is installed in the first cable walkway area 610 , and the second anode cable assembly 330 is arranged inside the steel structure, in this embodiment, inside the main pipe rack 800 .

[0062] The input end of the first anode cable assembly is connected to the positive electrode 1 of the multi-channel control device, and the output end of the first anode cable assembly is connected to the input end of the second anode cable assembly 330 through the first wiring device 320 .

[0063] The signal cable assembly includes a first signal cable assembly 410, a second wiring device 420 and a second signal cable assembly 430. The second wiring device 420 is installed in the second cable walkway area, and the second signal cable assembly 430 is arranged inside the steel structure.

[0064] The input end of the first signal cable assembly is connected to the terminal of the multi-channel control device, and the output end of the first signal cable assembly is connected to the input end of the second signal cable assembly through the second wiring device; the output end of the second signal cable assembly is connected to the dual reference electrode assembly 440.

[0065] Wherein, the first anode cable assembly is preferably a multi-core anode cable with sufficient strength and tensile resistance.

[0066] The underwater maintainable corrosion protection system disclosed in the present application provides cathodic protection through the cathode cable assembly to prevent corrosion of the metal structure; through the anode cable assembly, the underwater watertight connection assembly, and the auxiliary anode assembly, the underwater cable can be sealed and protected, and the steel structure can be protected against corrosion within a preset range through the coordinated design of the support assembly and the auxiliary anode assembly; the signal cable assembly is used to transmit the signals and data required for monitoring and controlling the operating status of the system, and the dual reference electrode assembly is used to measure and monitor the potential difference in the system to ensure the effectiveness of the cathode and anode protection. Specifically, the cathode cable assembly and the anode cable assembly provide current to make the target steel structure a cathode, thereby inhibiting corrosion; the anode cable assembly and the auxiliary anode assembly are used to provide additional anode protection, especially for the structure inside the main pipe rack; the underwater watertight connection assembly and the detachable auxiliary anode assembly realize the safe disassembly and maintenance of the underwater components, which is convenient for system maintenance and updating. The system disclosed in the present application not only effectively protects the underwater structure from corrosion, but also realizes convenient operation and efficient maintenance underwater, ensuring long-term protection effect and safe operation.

[0067] The underwater maintainable corrosion protection system disclosed in the present application can effectively protect the target conductor frame and prevent the corrosion of the target conductor frame by seawater, and is particularly suitable for large conductor frames; moreover, it can be maintained underwater, is convenient and quick to install, requires less work, is more economical, has a wave-resistant design, has reliable performance, and has a long service life.

[0068] Reference Figure 2 The multi-channel control device includes a main control center 110, a data acquisition instrument 120, and multiple constant potentiostat units 130, wherein the data acquisition instrument and multiple constant potentiostat units are all connected to the main control center signal, and each constant potentiostat unit independently controls one auxiliary anode device; the input of the constant potentiostat unit is three-phase alternating current.

[0069] Among them, the constant potential instrument unit is a drawer cabinet type, and each constant potential instrument unit can independently control one auxiliary anode.

[0070] Furthermore, the multi-channel control device also includes a temperature control device 140 for controlling the internal temperature of the device.

[0071] The master control center 110 may preferably be a computer to facilitate intelligent control of the entire system.

[0072] In this embodiment, the potentiostat as a whole is a negative feedback amplification-output system, which forms a closed-loop regulation with the protected object (such as the steel structure of the conductor rack). The potential at the power-on point is measured by a reference electrode and compared with the control signal as a sampling signal to control and adjust the polarization current output so that the power-on potential can be maintained at the set control potential.

[0073] The cathode cable assembly includes a cathode cable 210 and a cathode bus base 220 welded on the platform deck 500, and the output end of the cathode cable is connected to the cathode bus base.

[0074] Reference Figure 1 At the same time refer to Figure 3 The first wiring device 320 includes a first watertight wiring box 321 and a first protection box 322. The first watertight wiring box 321 is arranged inside the first protection box 322. The first protection box 322 protects the internal seal to ensure effective and reliable cable connection.

[0075] The second anode cable assembly 330 includes a watertight flexible cable 331, a first cable box 332 and a first cable protective tube 333. The first cable box 332 is arranged at the turning area of ​​the watertight flexible cable 331 to prevent bending from affecting the performance of the watertight flexible cable 331, thereby effectively ensuring the performance stability and long service life of the watertight flexible cable 331. The first cable protective tube 333 is sleeved on the outside of the watertight flexible cable 331 to ensure the protection of the watertight flexible cable.

[0076] In the first watertight junction box 321, detachable connections are respectively realized with the first anode cable assembly 310 and the watertight soft cable 331; after being connected, the normal connection of different sections of cables is guaranteed. At the same time, through the setting of the first watertight junction box, segmented disassembly can be realized, which is convenient for transportation and quick assembly, simple and efficient.

[0077] In this embodiment, the watertight flexible cable can be provided with multiple sections, and multiple first cable boxes can be provided. The multiple first cable boxes are respectively arranged at the turning connections (i.e., inflection points) of the multiple sections, which does not affect the overall performance of the watertight flexible cable.

[0078] When the watertight flexible cable needs to turn for the first time, a first cable box is set up. The first first cable box set up at this time is also located in the first cable walkway area 610. Then, the cable coming out of the first first cable box is introduced into the main pipe rack, that is, it is pulled underwater from the inside of the main pipe rack.

[0079] In this embodiment, the first cable protection tube is sleeved on the outside of the multiple cable segments and is sealed and connected to each first cable box, which is convenient for installation and connection. It should be noted that if the first cable protection tube can protect the second cable boxes after the first cable boxes are installed to protect the first cable boxes, this solution is also possible and is within the protection scope of this application, so it will not be described in detail here.

[0080] The second wiring device 420 includes a second watertight wiring box 421 and a second protection box 422. The second watertight wiring box 421 is arranged inside the second protection box 422. The second protection box 422 protects the internal seal to ensure effective and reliable cable connection.

[0081] The second signal cable assembly 430 includes a second signal cable 431, a second cable box 432 and a second cable protective tube 433. The second cable box 432 is arranged at the turning area of ​​the second signal cable 431 to prevent bending from affecting the performance of the second signal cable 431, thereby effectively ensuring the performance stability and long service life of the second signal cable 431. The second cable protective tube 433 is sleeved on the outside of the second signal cable 431 to ensure protection of the second signal cable 431.

[0082] In the second watertight junction box 421, detachable connections are respectively realized with the first signal cable assembly 410 and the second signal cable 431; after being connected, the normal connection of different sections of cables is guaranteed. At the same time, through the setting of the second watertight junction box, segmented disassembly can be realized, which is convenient for transportation and quick assembly, simple and efficient.

[0083] In this embodiment, the second signal cable 431 may be provided with multiple sections, and multiple second cable boxes 432 may be provided. Multiple second cable boxes 432 are respectively arranged at the turning connections of the multiple sections, which does not affect the overall performance of the second signal cable 431.

[0084] When the second signal cable 431 needs to turn for the first time, a second cable box 432 is set up. At this time, the first second cable box 432 is also located in the second cable walkway area 620. Then, the cable coming out of the first second cable box 432 is introduced into the main pipe rack, that is, it is pulled underwater from the inside of the main pipe rack.

[0085] In this embodiment, the second cable protection tube is sleeved on the outside of the multiple cable segments and is sealed and connected to each second cable box 432, which is convenient for installation and connection. It should be noted that if the second cable protection tube can protect the second cable boxes 432 after the second cable boxes 432 are installed to protect the second cable boxes 432, this solution is also possible and is also within the protection scope of this application, so it will not be described in detail here.

[0086] Furthermore, the input end of the first wiring device is connected to the output end of the first anode cable assembly; the input end of the second anode cable assembly is connected to the output end of the first wiring device; the input end of the second wiring device is connected to the output end of the first signal cable assembly; the input end of the second signal cable assembly is connected to the output end of the second wiring device, and the detachable connection of the anode cable and the signal cable is realized through the first wiring device and the second wiring device respectively.

[0087] It should be noted that, for the installation of cables and cable boxes, the corresponding cables can be bundled on the threaded steel bars in the corresponding cable boxes.

[0088] In this embodiment, the cable located in the underwater part is fixed by a wire pressing plate when connected to the corresponding cable box.

[0089] Reference Figure 1 At the same time refer to Figure 4 The support assembly includes a first mounting assembly 360 , a second mounting assembly 370 , and a mounting rope 380 disposed between the first mounting assembly 360 and the second mounting assembly 370 .

[0090] The first installation component is installed in the first conduit area 710. Specifically, the first installation component 360 includes a first cable joint head 361, a first shackle 362 and a first lifting ear 363. One end of the first cable joint head is connected to one end of the installation rope 380, and the other end of the first cable joint head is connected to one end of the first lifting ear through the first shackle; the other end of the first lifting ear is fixedly connected to the first conduit area.

[0091] Among them, the first cable segment is cast on the upper part of the extruded steel wire rope.

[0092] The first installation component 360 also includes a first spare connection component, which includes a first spare anchor chain 364 and a first spare lifting ear 365. One end of the first spare anchor chain is connected to the first shackle, and the other end is connected to the first spare lifting ear. The first spare lifting ear is fixedly connected to the first conduit area, and the first spare lifting ear is installed at a different position from the first lifting ear. The first spare anchor chain is tilted relative to the installation rope 380.

[0093] During installation, the first shackle 362 is first connected to the first cable head 361, the first spare anchor chain 364 is connected to the first cable head 361 using the first shackle 362, and the eye bolt on the first cable head 361 is connected by a crane to lift the rigging.

[0094] The second installation component 370 is installed in the second conduit area 720. Specifically, the second installation component 370 includes a second cable joint head 371, a second shackle 372, a second lifting ear 373 and an anti-corrosion block 379. The anti-corrosion block is installed on the second cable joint head; one end of the second cable joint head is connected to the other end of the installation rope 380, and the other end of the second cable joint head is connected to one end of the second lifting ear through the second shackle; the other end of the second lifting ear is fixedly connected to the second conduit area.

[0095] A connecting anchor chain 374, a turnbuckle connector 375 and a third shackle 376 are also provided between the second shackle and the second lifting ear. One end of the connecting anchor chain is connected to the second shackle, and the other end is connected to the second lifting ear through the turnbuckle connector and the third shackle in sequence.

[0096] The second installation component 370 also includes a second spare connection component, which includes a second spare anchor chain 377 and a second spare lifting ear 378. One end of the second spare anchor chain is connected to the second shackle, and the other end is connected to the second spare lifting ear. The second spare lifting ear is fixedly connected to the second conduit area, and the second spare lifting ear is installed at a different position from the second lifting ear. The second spare anchor chain is tilted relative to the installation rope 380.

[0097] In this embodiment, the second backup connection assembly and the first backup connection assembly form a double layer of protection for the entire tensile structure.

[0098] The second backup connection component and the first backup connection component are preferably arranged on the same side of the installation rope, that is, the first backup connection component and the second backup connection component form corresponding inclined backup fixations in the upper end area and the lower end area of ​​the installation rope respectively. The same-side arrangement can further improve the connection and fixation of the installation rope relative to the conductor frame. Because the installation rope is located in the sea water, it may encounter various strong wave impacts in reality, which will cause the installation rope to shake. Through the arrangement of the support component in the present application, the installation stability of the installation rope can be effectively guaranteed, and at the same time, the freedom of the installation rope within a preset range can be satisfied, instead of tightening the installation rope. By ensuring the installation stability of the installation rope, the installation stability and reliability of the auxiliary anode assembly installed on the installation rope can be guaranteed.

[0099] During installation, the second cable joint head 371 is connected to the connecting anchor chain 374 by the second shackle 372, and the turnbuckle connector 375 and the second lifting lug 373 form a main tensile structure; the second spare anchor chain 377 is fixed to the second cable joint head 371 by the second shackle 372. The whole rigging and cable are hoisted to the designated position by a crane, and the first lifting lug 363 (i.e., the main lifting lug) on ​​the upper part is first connected by the second shackle 372, and then the second spare anchor chain 377 is connected to the second spare lifting lug 378 by the second shackle 372.

[0100] A second shackle 372 is used at the lower part, connected to the second lifting eye 373, and the second spare anchor chain 377 is connected to the second spare lifting eye 378. The turnbuckle connector 375 is rotated to tighten the entire rigging to a specified tension, and then the threads on the turnbuckle connector are welded and fixed to prevent loosening under external force, thereby ensuring a stable and reliable installation.

[0101] The underwater watertight connection assembly 340 includes a watertight outlet 341, a connector 342, a transition cable and a silicone hose 343. One end of the watertight outlet 341 is connected to the output end of the second anode cable assembly 330, specifically, to the output end of the watertight soft cable 331; the other end of the watertight outlet 341 is connected to one end of the transition cable. The other end of the transition cable is connected to one end of the connector 342, and the other end of the connector 342 is connected to the underwater auxiliary anode main cable;

[0102] The silicone hose 343 is installed on the outside of the watertight outlet 341, the connector 342, and the transition cable, and the silicone hose, the watertight outlet 341, and the connector 342 are all sealed.

[0103] The connector is a watertight structure that connects and ensures watertightness. It is equipped with watertight plug-in parts. The watertight soft cable and the underwater auxiliary anode main cable are electrically connected here through a mother-and-child watertight plug-in connection. When the underwater auxiliary anode needs to be replaced, only the underwater auxiliary anode main cable and its auxiliary anode component unit need to be replaced.

[0104] Through the setting of the support components in the present application, there is no need to weld a large number of bases and protective tubes. Through the setting of the scheme disclosed in the present application, both uniform distribution of current and simple, economical and efficient underwater maintainable corrosion protection can be achieved.

[0105] The double reference electrode assembly 440 is installed in the third conduit region 730, and specifically includes a steel core 441, a sacrificial anode 442, an insulating flange 443, a double reference electrode 444 and an anode current probe 445, wherein the double reference electrode 444 is assembled from silver / silver chloride and a high-purity zinc reference electrode; the two ends of the anode current probe 445 are respectively welded to the third conduit region and the sacrificial anode 442, specifically, the ends of the anode current probe 445 are connected to upper and lower conductive rods, and the two ends of the upper and lower conductive rods are respectively welded to the steel pipes on both sides of the insulating flange. The other end of the sacrificial anode 442 is insulated and connected to the third conduit region through the insulating flange 443.

[0106] Specifically, the sacrificial anode may be an aluminum alloy metal structure.

[0107] Among them, the dual reference electrode adopts an underwater plug-in structure, which is convenient for quick replacement after damage or failure.

[0108] Reference Figure 4 and Figure 5 The auxiliary anode assembly 350 is fixedly connected to the installation rope 380 through a plurality of fixing parts.

[0109] Specifically, the auxiliary anode assembly 350 includes an underwater auxiliary anode main cable 351 and a plurality of auxiliary anode components 352 arranged on the outside of the underwater auxiliary anode main cable, the plurality of auxiliary anode components are electrically connected to the underwater auxiliary anode main cable, and the connection between each auxiliary anode component and the underwater auxiliary anode main cable is independently set; the plurality of auxiliary anode components are fixed to the installation rope by a plurality of fixing components, respectively.

[0110] Among them, the underwater auxiliary anode main cable is a multi-core cable, which is longitudinally watertight and has sufficient strength and tensile resistance to meet the requirements of waterproofing, high strength, high tensile resistance, and is resistant to hypochlorous acid and oxidation.

[0111] In this embodiment, the underwater auxiliary anode main cable is preferably a four-core cable, and four auxiliary anode components are also provided. The four auxiliary anode components are electrically connected to each core cable of the underwater auxiliary anode main cable, respectively, to ensure that the output of each auxiliary anode can be accurately controlled.

[0112] The auxiliary anode member 352 includes a connecting copper tube 3521, a cable clamping portion 3522 is provided in the middle of the connecting copper tube, and the cable clamping portion is used to realize the electrical connection between the underwater auxiliary anode main cable and the connecting copper tube, that is, when powered on, the connecting copper tube and the underwater auxiliary anode main cable form a whole; both ends of the connecting copper tube are sealed, which can be specifically Epoxy sealant in the middle Sealing glue, To ensure moisture-proof and watertight protection for the cables inside, the outside of the copper tube is provided with a lifting ear, which is fixed with a fixing piece and an installation rope.

[0113] Specifically, an upper sealing component 3523 is provided at the upper part of the connecting copper tube, and a lower sealing component 3524 is provided at the lower part to ensure the sealing of the cable in each section of the auxiliary anode.

[0114] Furthermore, the outer side of the connecting copper tube is provided with a lifting lug made of titanium alloy for easy lifting.

[0115] In this embodiment, the fixing part is preferably an anode clamp 390, and the installation rope is preferably an extruded steel wire rope 380; the first conduit area and the second conduit area are preferably a first branch conduit rack and a second branch conduit rack, respectively, and the first branch conduit rack and the second branch conduit rack are preferably arranged in parallel to ensure that the installation rope installed between the first branch conduit rack and the second branch conduit rack is in a stretched state, so as to facilitate the auxiliary anode assembly to form protection of the preset area target architecture.

[0116] Furthermore, the anode fixture includes a titanium alloy clamp, an insulating gasket, and a bolt. After the cable is clamped by the titanium alloy clamp, the insulating gasket and the bolt are fixed to achieve fixed installation with the installation rope. Through the provision of the insulating gasket, each section of the auxiliary anode in the auxiliary anode assembly is fixed and insulated from the titanium alloy clamp.

[0117] When in use, the multi-channel control device starts power supply, turns on the corresponding constant potential instrument unit switch, sets it to constant potential mode, adjusts the value of the protection potential, and after clicking output, each constant potential instrument unit will automatically adjust and output current to make the target catheter rack reach the protection potential based on the potential of the corresponding target catheter rack fed back by the corresponding dual reference electrode assembly.

[0118] The steps for replacing the underwater auxiliary anode specifically include: removing the bolts on the anode fixture, removing the anode fixture from the extruded steel wire rope, removing the connector of the underwater auxiliary anode main cable from the connector, and disconnecting the underwater auxiliary anode main cable and the watertight flexible cable.

[0119] Install the new auxiliary anode assembly, fix the lifting lugs in the auxiliary anode assembly with bolts and wire ropes, use a crane to lift the auxiliary anode system to the specified location, and use bolts to tighten the titanium alloy clamps and insulating gaskets through diving operations to fix each section of the auxiliary anode in the auxiliary anode assembly and insulate the titanium alloy clamps. Tighten all bolts on the other side of the titanium alloy clamps to fix the titanium alloy clamps on the extruded steel wire ropes.

[0120] The underwater maintainable corrosion protection system disclosed in the present application realizes the rapid installation of the stretching cathodic protection device for marine metal structures, reduces the workload and installation time of the stretching anode installation, reduces the installation cost and installation risk, and can more effectively realize the stretching external current cathodic protection of marine metal structures to protect them from corrosion damage. It is extremely economical, easy to use, and improves work efficiency.

[0121] The underwater maintainable corrosion protection system disclosed in the present application has a wide range of uses and can be applied to the tensile impressed current cathodic protection of various marine metal structures, such as all offshore facilities such as offshore platforms, submarine pipelines, port terminals, etc. Different numbers of auxiliary anodes can be carried according to needs, which reduces the workload and installation time of the tensile sacrificial anode installation, reduces the installation cost and installation risk, and can more effectively achieve cathodic protection of marine metal structures.

[0122] The underwater maintainable corrosion protection system disclosed in the application can be easily replaced when the corrosion protection part is damaged, which increases the convenience and safety of offshore construction. The damaged unit can be replaced separately, reducing material costs and installation costs.

[0123] Furthermore, the underwater maintainable corrosion protection system disclosed in the present application also includes multiple protection systems, each of which can be connected to a multi-channel control device to achieve protection of steel structures in different areas.

[0124] Specifically, each protection system may include a cathode cable assembly, an anode cable assembly, an underwater watertight connection assembly, an auxiliary anode assembly, a support assembly, a signal cable assembly and a dual reference electrode assembly.

[0125] Alternatively, each protection system may include a second anode cable assembly, an underwater watertight connection assembly, an auxiliary anode assembly, a support assembly, a second signal cable assembly and a dual reference electrode assembly, that is, multiple protection systems may share a set of cathode cable assemblies, a set of first wiring devices, a set of second wiring devices, a set of first anode cable assemblies, and a set of first signal cable assemblies.

[0126] The constant potentiostat of the utility model is a multi-channel constant potentiostat, which can realize individual control of the auxiliary anode of each unit (that is, realize corresponding control of multiple protection systems). In the event of a single-channel constant potentiostat failure or a single-unit auxiliary anode failure, the other multiple-channel constant potentiostats and the auxiliary anodes of other units can still operate, ensuring that the entire catheter rack is in an impressed current cathodic protection state. The mutually independent utility models increase the reliability of the equipment.

[0127] Specifically, multiple protection systems are installed in a distributed manner in the underwater part. They can be arranged based on finite element numerical simulation calculations combined with the specific structure of the jacket. Under the premise of avoiding structural interference, the impact of operations such as the jacket launching and the floating of the upper platform are comprehensively considered to determine the number of underwater maintainable corrosion protection systems and the locations of hanging points.

[0128] The underwater maintainable corrosion protection system disclosed in the present application is a new type of impressed current cathodic protection system design. The protected metal cathode is polarized by an external power supply or a sacrificial anode, so that the metal electrode potential is negatively shifted from the self-corrosion potential to the open circuit potential of the metal surface corrosion cell anode, thereby achieving corrosion protection for the target area. Through a stretching setting, a more flexible and efficient underwater replaceable solution is provided, which effectively reduces the risk of underwater construction and the difficulty of maintenance, while improving the reliability and adaptability of the system.

[0129] The underwater maintainable corrosion protection system disclosed in the present application can reduce resistance loss for multi-channel protection through optimized design, making the current distribution more uniform and the protection effect better; the system provides easy upgrade and expansion capabilities to adapt to the development needs of the conductor frame platform, thereby improving the overall anti-corrosion protection efficiency and economy.

[0130] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments / methods or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments / methods or examples described in this specification and the features of the different embodiments / methods or examples, unless they are contradictory.

[0131] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0132] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. An underwater maintainable corrosion protection system, characterized in that: include: Multi-channel control equipment installed on the platform deck; Cathode cable assembly; The input end of the cathode cable assembly is connected to the negative electrode of the multi-channel control device, and the output end is connected to the platform deck; Anode cable assembly; The input end of the anode cable assembly is connected to the positive electrode of the multi-channel control device; An underwater watertight connection assembly connected to the anode cable assembly; an auxiliary anode assembly detachably connected to the underwater watertight connection assembly; a support assembly mounted in a target catheter area; The auxiliary anode assembly is mounted on the support assembly, and the support assembly is insulated from the auxiliary anode assembly; A signal cable assembly connected to the terminals of the multi-channel control device; A dual reference electrode assembly is connected to the signal cable assembly.

2. The underwater maintainable corrosion protection system according to claim 1, characterized in that: The support assembly includes a first mounting assembly, a second mounting assembly, and a mounting rope disposed between the first mounting assembly and the second mounting assembly; The first mounting assembly is mounted in the first conduit region; The second mounting assembly is mounted in the second conduit region; The auxiliary anode assembly is fixedly connected to the installation rope via a plurality of fixing members.

3. The underwater maintainable corrosion protection system according to claim 2, characterized in that: The first installation assembly includes a first cable knot head, a first shackle and a first lifting ear, one end of the first cable knot head is connected to one end of the installation rope, and the other end of the first cable knot head is connected to one end of the first lifting ear through the first shackle; the other end of the first lifting ear is fixedly connected to the first conduit area; The second installation assembly comprises a second cable joint head, a second shackle, a second lifting ear and an anti-corrosion block, wherein the anti-corrosion block is installed on the second cable joint head; One end of the second cable joint head is connected to the other end of the installation rope, and the other end of the second cable joint head is connected to one end of the second lifting ear through the second shackle; the other end of the second lifting ear is fixedly connected to the second conduit area.

4. The underwater maintainable corrosion protection system according to claim 3, characterized in that: The first installation assembly further includes a first spare connection assembly, the first spare connection assembly includes a first spare anchor chain and a first spare lifting eye, one end of the first spare anchor chain is connected to the first shackle, and the other end is connected to the first spare lifting eye; the first spare lifting eye is fixedly connected to the first conduit area, and the first spare lifting eye is installed at a different position from the first lifting eye, and the first spare anchor chain is tilted relative to the installation rope; The second installation assembly also includes a second spare connection assembly, which includes a second spare anchor chain and a second spare lifting ear, one end of the second spare anchor chain is connected to the second shackle, and the other end is connected to the second spare lifting ear; the second spare lifting ear is fixedly connected to the second conduit area, and the second spare lifting ear is installed at a different position from the second lifting ear, and the second spare anchor chain is inclined relative to the installation rope 380.

5. The underwater maintainable corrosion protection system according to claim 4, characterized in that: The second backup connection assembly and the first backup connection assembly are arranged on the same side of the installation rope; A connecting anchor chain, a turnbuckle connector, and a third shackle are also provided between the second shackle and the second lifting ear. One end of the connecting anchor chain is connected to the second shackle, and the other end is connected to the second lifting ear through the turnbuckle connector and the third shackle in sequence.

6. The underwater maintainable corrosion protection system according to claim 2, characterized in that: The auxiliary anode assembly includes an underwater auxiliary anode main cable and a plurality of auxiliary anode components arranged outside the underwater auxiliary anode main cable, the plurality of auxiliary anode components are electrically connected to the underwater auxiliary anode main cable, and the connection between each auxiliary anode component and the underwater auxiliary anode main cable is independently arranged; The plurality of auxiliary anode members are fixed to the installation ropes through the plurality of fixing members respectively.

7. The underwater maintainable corrosion protection system according to claim 6, characterized in that: The underwater watertight connection assembly includes a watertight outlet, a connector, a transition cable and a silicone hose, one end of the watertight outlet is connected to the anode cable assembly, and the other end is connected to one end of the transition cable; the other end of the transition cable is connected to one end of the connector, and the other end of the connector is connected to the underwater auxiliary anode main cable; The silicone hose is installed on the outside of the watertight outlet, the connector and the transition cable, and the silicone hose, the watertight outlet and the connector are all sealed.

8. The underwater maintainable corrosion protection system according to claim 7, characterized in that: The anode cable assembly comprises a first anode cable assembly, a first wiring device and a second anode cable assembly, wherein the first wiring device is installed in the first cable walkway area, and the second anode cable assembly is arranged inside the steel structure; The input end of the first anode cable assembly is connected to the positive electrode of the multi-channel control device, and the output end of the first anode cable assembly is connected to the input end of the second anode cable assembly through the first wiring device; The output end of the two-anode cable assembly is connected to the watertight outlet.

9. The underwater maintainable corrosion protection system according to claim 1, characterized in that: The signal cable assembly comprises a first signal cable assembly, a second wiring device and a second signal cable assembly, the second wiring device is installed in the second cable walkway area, and the second signal cable assembly is arranged inside the steel structure; The input end of the first signal cable assembly is connected to the terminal of the multi-channel control device, and the output end of the first signal cable assembly is connected to the input end of the second signal cable assembly through the second wiring device; The output end of the second signal cable assembly is connected to the dual reference electrode assembly.

10. An underwater maintainable corrosion protection system, characterized in that: Multi-channel control equipment installed on the platform deck; Cathode cable assembly; the input end of the cathode cable assembly is connected to the negative electrode of the multi-channel control device, and the output end is connected to the platform deck; Multi-channel protection system; The multiple protection systems are all connected to the multiple control devices, and the multiple protection systems are independent of each other, and the underwater protection parts of the multiple protection systems are distributed in different steel frame areas; Each of the protection systems includes an anode cable assembly, an underwater watertight connection assembly connected to the anode cable assembly, an auxiliary anode assembly detachably connected to the underwater watertight connection assembly, a support assembly installed in the target catheter area, a signal cable assembly connected to the terminal of the multi-channel control device, and a dual reference electrode assembly connected to the signal cable assembly; The input end of the anode cable assembly is connected to the positive electrode of the multi-channel control device; The auxiliary anode assembly is mounted on the support assembly, and the support assembly is insulated from the auxiliary anode assembly.

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