Seabed type auxiliary anode device and cathode protection system for underwater impressed current

Abstract

The invention provides a seabed type auxiliary anode device and an underwater impressed current cathode protection system, and belongs to the technical field of underwater equipment protection. The seabed type auxiliary anode device provided by the invention comprises a protective cover, an anode body, a cable, a wiring sleeve, a wiring box and a bending limiter, the anode body is arranged in the protective cover, the wiring sleeve is nested in the anode body, one end of the cable is arranged in the wiring sleeve in the anode body in a penetrating manner, and epoxy filler is poured into the anode body; the junction box is arranged in the protective cover, the interior of the junction box is communicated with the interior of the anode body, the cable penetrates through the junction box, a binding post is arranged in the junction box, the cable is fixed to the binding post, and epoxy filler is poured into the junction box; the bending limiter is arranged on the outer wall of the protective cover, and the cable penetrates through the bending limiter. The invention provides a seabed type auxiliary anode device and an underwater impressed current cathode protection system, which can improve the reliability of the joint of a cable and an auxiliary anode.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater equipment protection, and in particular to a seabed-type auxiliary anode device and an underwater impressed current cathodic protection system. Background Art

[0002] Currently, there are various methods for protecting underwater facilities, with impressed current cathodic protection being the most widely used. However, due to the complex underwater environment, this method can cause cables to float, leading to long-term bending and wear at the connection point between the cable and the auxiliary anode. This can easily lead to poor contact and, in severe cases, even breakage, compromising the normal operation of the entire cathodic protection system and reducing the protective effectiveness of the equipment. Summary of the Invention

[0003] In order to solve at least one of the problems mentioned in the background technology, the present invention provides a seabed auxiliary anode device and an underwater impressed current cathodic protection system, which can improve the reliability of the connection between the cable and the auxiliary anode.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] In a first aspect, the present invention provides a seabed auxiliary anode device for use in an underwater impressed current cathodic protection system, comprising a protective cover, an anode body, a cable, a wiring sleeve, a wiring box, and a bend limiter;

[0006] The anode body is arranged in the protective cover. The anode body is a hollow tubular structure. The wiring sleeve is nested in the anode body. One end of the cable is passed through the wiring sleeve in the anode body and is electrically connected to the wiring sleeve by pressing. The inside of the anode body is filled with epoxy filler.

[0007] The junction box is arranged in the protective cover, and is connected to one end of the anode body along its own axis. The interior of the junction box is connected to the interior of the anode body. The cable is passed through the junction box. The junction box has a terminal, and the cable is fixed to the terminal. The junction box is filled with epoxy filler.

[0008] The bending limiter is arranged on the outer wall of the protective cover, and the cable is passed through the bending limiter.

[0009] As an optional embodiment, there are at least two anode bodies, and the cables include a main cable and at least two branch cables, wherein the first ends of the branch cables are passed through the corresponding anode bodies and fixedly and electrically connected to the wiring bushings, and the second ends of the branch cables are passed through the wiring box and fixedly and electrically connected to the terminal posts;

[0010] One end of the main cable is passed through the junction box and fixedly and electrically connected to the terminal post, and the other end of the main cable passes through the bend limiter and extends out of the protective cover.

[0011] As an optional embodiment, it also includes a sealing joint. The side of the junction box facing away from the anode body has a through hole for the main cable to pass through. The sealing joint is installed at the through hole and is sleeved outside the main cable. The bend limiter is sleeved outside the sealing joint.

[0012] As an optional embodiment, it also includes an anode mounting frame, which includes a top plate and a first side plate and a second side plate connected to opposite sides of the top plate. The anode mounting frame can be removably installed in a protective cover. The top of the protective cover has an opening, the size of the opening matches the top plate, the top plate covers the opening, and the anode body is installed between the two side plates.

[0013] As an optional embodiment, it also includes a first insulating flange and a second insulating flange, the first insulating flange is connected between the first end of the anode body and the inner side of the first side plate, the junction box is arranged on the outer side of the first side plate, and the first side plate has a wire hole for the branch cable to pass through, the wire hole connects the interior of the anode body and the interior of the junction box, and the second insulating flange is connected between the second end of the anode body and the inner side of the second side plate.

[0014] As an optional embodiment, the top plate is provided with a plurality of filtering holes.

[0015] As an optional embodiment, the junction box includes a shell, a cover and an insulating gasket. The shell has a mounting opening, the cover is removably covered on the mounting opening, the insulating gasket is arranged in the shell, and the terminal is arranged on the insulating gasket.

[0016] As an optional embodiment, a sacrificial anode is further included, and the sacrificial anode is arranged outside the protective cover to perform electrochemical protection on the protective cover.

[0017] As an optional embodiment, the protective cover includes a base, the bottom of the base has a plurality of sharp corner structures for inserting into mud and sand, and the base has a plurality of air holes.

[0018] In a second aspect, the present invention further provides an underwater impressed current cathodic protection system, comprising a potentiostat, a cable fixing device, and the seabed auxiliary anode device of the first aspect, wherein one end of the cable is electrically connected to the seabed auxiliary anode device, and the other end of the cable is electrically connected to the potentiostat;

[0019] There are multiple cable fixing devices, which are arranged along the extension path of the cable to fix multiple locations on the cable.

[0020] The seabed auxiliary anode device provided by the present invention is used in an underwater external current cathodic protection system, including a protective cover, an anode body, a cable, a wiring sleeve, a junction box and a bending limiter; the anode body is arranged in the protective cover, the anode body is a hollow tubular structure, the wiring sleeve is nested in the anode body, one end of the cable is passed through the wiring sleeve in the anode body and is electrically connected to the wiring sleeve by pressing, and the inside of the anode body is poured with epoxy filler; the junction box is arranged in the protective cover, the junction box is connected to one end of the anode body along its own axial direction, and the inside of the junction box is connected to the inside of the anode body, the cable is passed through the junction box, there is a terminal in the junction box, the cable is fixed to the terminal post, and the junction box is poured with epoxy filler; the bending limiter is arranged at the outer wall of the protective cover, and the cable is passed through the bending limiter.

[0021] The seabed auxiliary anode device provided by the present invention designs the anode body as a hollow tubular structure and embeds the wiring sleeve, so that one end of the cable is inserted into the wiring sleeve and electrically connected by pressing, and at the same time, epoxy filler is poured into the inside of the anode body, which not only stabilizes the connection between the cable and the wiring sleeve, but also enhances the sealing and protection through the filler, reducing the risk of loosening of the connection due to the influence of the external environment; secondly, a junction box is set in the protective cover, the interior of which is connected to the anode body, and the cable is fixed to the terminal post after passing through the junction box, and epoxy filler is also poured into the junction box, further strengthening the cable connection and reducing the possibility of poor contact; finally, a bending limiter is set on the outer wall of the protective cover, and the cable is passed through it. The bending limiter can effectively limit the floating range of the cable, avoid excessive bending of the cable, and reduce wear on the connection between the cable and the auxiliary anode. The seabed auxiliary anode device provided by the present invention improves the reliability of the connection between the cable and the auxiliary anode through the above design, ensures the normal operation of the cathodic protection system, and effectively enhances the protection effect of underwater equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A schematic diagram of the overall structure of a seabed auxiliary anode device provided in an embodiment of the present invention;

[0024] Figure 2 A schematic cross-sectional view of a seabed auxiliary anode device provided in an embodiment of the present invention;

[0025] Figure 3A schematic diagram of the installation of the anode body and the anode mounting frame in the seabed auxiliary anode device provided by an embodiment of the present invention;

[0026] Figure 4 for Figure 3 The main view;

[0027] Figure 5 A schematic diagram of the base structure of a protective cover in a seabed-type auxiliary anode device provided by an embodiment of the present invention;

[0028] Figure 6 A schematic structural diagram of a bending limiter in a seabed auxiliary anode device provided in an embodiment of the present invention.

[0029] Description of reference numerals:

[0030] 100-seabed auxiliary anode device;

[0031] 110-protective cover; 111-base; 1111-pointed structure; 1112-ventilation hole;

[0032] 120- anode body;

[0033] 130-cable; 131-main cable; 132-branch cable;

[0034] 140-wiring sleeve;

[0035] 150-junction box; 151-terminal; 152-housing; 1521-perforation; 153-cover; 154-insulating gasket;

[0036] 160-bend limiter;

[0037] 170-epoxy filler;

[0038] 180-sealed joint;

[0039] 190-anode mounting frame; 191-top plate; 1911-filter hole; 192-first side plate; 193-second side plate;

[0040] 200-first insulating flange;

[0041] 210-second insulating flange;

[0042] 220-Sacrificial anode;

[0043] 300-Cable fixing device. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0046] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0047] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0048] Furthermore, the terms "first," "second," and the like are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0049] Currently, there are various methods for protecting underwater facilities, with impressed current cathodic protection being the most widely used. However, due to the complex underwater environment, this method can cause cables to float, leading to long-term bending and wear at the connection point between the cable and the auxiliary anode. This can easily lead to poor contact and, in severe cases, even breakage, compromising the normal operation of the entire cathodic protection system and reducing the protective effectiveness of the equipment.

[0050] In view of this, the present invention provides a seabed-type auxiliary anode device, comprising a protective cover, an anode body, a cable, a wiring sleeve, a junction box and a bending limiter; the anode body is arranged in the protective cover, and the anode body is designed to be a hollow tubular structure and the wiring sleeve is nested, so that one end of the cable is inserted into the wiring sleeve and electrically connected by pressing, and at the same time, epoxy filler is poured into the inside of the anode body, which not only can stabilize the connection between the cable and the wiring sleeve, but also can enhance the sealing and protection through the filler, and reduce the risk of loosening of the connection due to the influence of the external environment; secondly, a junction box is provided in the protective cover, and its interior is connected to the anode body. After the cable is inserted into the junction box, it is fixed to the terminal post, and epoxy filler is also poured into the junction box, which further strengthens the cable connection and reduces the possibility of poor contact; finally, a bending limiter is provided on the outer wall of the protective cover, and the cable is inserted therein. The bending limiter can effectively limit the floating range of the cable, avoid excessive bending of the cable, and reduce wear on the connection between the cable and the auxiliary anode. The seabed auxiliary anode device provided by the present invention improves the reliability of the connection between the cable and the auxiliary anode through the above design, ensures the normal operation of the cathodic protection system, and effectively enhances the protection effect of underwater equipment.

[0051] Figure 1 A schematic diagram of the overall structure of a seabed auxiliary anode device provided in an embodiment of the present invention; Figure 2 A schematic cross-sectional view of a seabed auxiliary anode device provided in an embodiment of the present invention; Figure 3 A schematic diagram of the installation of the anode body and the anode mounting frame in the seabed auxiliary anode device provided by an embodiment of the present invention; Figure 4 for Figure 3 The main view; Figure 5 A schematic diagram of the base structure of a protective cover in a seabed-type auxiliary anode device provided by an embodiment of the present invention; Figure 6 A schematic structural diagram of a bending limiter in a seabed auxiliary anode device provided in an embodiment of the present invention.

[0052] You can refer to Figures 1 to 6The embodiment of the present invention provides a seabed auxiliary anode device 100 for use in an underwater impressed current cathodic protection system, comprising a protective cover 110, an anode body 120, a cable 130, a wiring sleeve 140, a junction box 150, and a bending limiter 160; the anode body 120 is disposed in the protective cover 110, the anode body 120 is a hollow tubular structure, the wiring sleeve 140 is nested in the anode body 120, one end of the cable 130 is passed through the wiring sleeve 140 in the anode body 120, and is electrically connected to the wiring sleeve 140 by pressing. The inside of the pole body 120 is poured with epoxy filler 170; the junction box 150 is arranged in the protective cover 110, and the junction box 150 is connected to one end of the anode body 120 along its own axial direction, and the inside of the junction box 150 is connected to the inside of the anode body 120, the cable 130 is passed through the junction box 150, and the junction box 150 has a terminal 151, the cable 130 is fixed to the terminal post 151, and the junction box 150 is poured with epoxy filler 170; the bending limiter 160 is arranged at the outer wall of the protective cover 110, and the cable 130 is passed through the bending limiter 160.

[0053] The seabed auxiliary anode device 100 provided by the embodiment of the present invention is designed to be a hollow tubular structure of the anode body 120 and to be nested with the wiring sleeve 140, so that one end of the cable 130 is inserted into the wiring sleeve 140 and then electrically connected by pressing. At the same time, the epoxy filler 170 is poured into the inside of the anode body 120, which not only can stabilize the connection between the cable 130 and the wiring sleeve 140, but also can enhance the sealing and protection through the filler, thereby reducing the risk of the connection being loosened due to the influence of the external environment; secondly, a junction box 170 is set in the protective cover 110. 50, its interior is connected to the anode body 120, and the cable 130 is inserted into the junction box 150 and fixed to the terminal post 151. The junction box 150 is also filled with epoxy filler 170 to further strengthen the connection of the cable 130 and reduce the possibility of poor contact. Finally, a bend limiter 160 is set on the outer wall of the protective cover 110, and the cable 130 is inserted into it. The bend limiter 160 can effectively limit the floating range of the cable 130, prevent the cable 130 from excessive bending, and reduce wear at the connection between the cable 130 and the auxiliary anode. The seabed auxiliary anode device 100 provided by the embodiment of the present invention improves the reliability of the connection between the cable 130 and the auxiliary anode through the above design, ensures the normal operation of the cathodic protection system, and effectively enhances the protection effect of underwater equipment.

[0054] In the above embodiment, at least two anode bodies 120 can be provided. The cables 130 include a main cable 131 and at least two branch cables 132. The first end of each branch cable 132 is inserted into the corresponding anode body 120 and fixedly and electrically connected to the wiring sleeve 140. The second end of each branch cable 132 is inserted into the junction box 150 and fixedly and electrically connected to the terminal post 151. One end of the main cable 131 is inserted into the junction box 150 and fixedly and electrically connected to the terminal post 151. The other end of the main cable 131 passes through the bend limiter 160 and extends out of the protective cover 110. As can be appreciated, the provision of multiple anode bodies 120 disperses the current output pressure, preventing rapid wear of individual anodes due to long-term high-load operation, and improving the durability of the entire seabed-type auxiliary anode apparatus 100. The fixed electrical connection of the branch cables 132 to the anode body 120 and wiring sleeve 140, as well as their connection to the terminal post 151 in the junction box 150, ensures a stable current transmission path and reduces current loss due to poor contact. Secondly, the combined layout of the branch cables 132 and the main cable 131 forms a rational current distribution network. The branch cables 132 can accurately transmit current to the corresponding anode bodies 120, while the main cable 131 is responsible for the introduction and extraction of the total current, ensuring that each anode body 120 can output current evenly, thereby improving the protection effectiveness of the underwater impressed current cathodic protection system. In addition, the branch cables 132 are respectively installed in each anode body 120 and connected at the junction box 150. Together with the epoxy filler 170 injected into the junction box 150, they effectively isolate the cable 130 connectors from underwater corrosive media. The bend limiter 160 constrains the main cable 131, preventing it from excessive bending and shaking underwater. This reduces the risk of cable 130 sheath wear and internal circuit breakage, extends the service life of the cable 130, ensures the continuity of current transmission, and further enhances the reliability of the entire seabed auxiliary anode device 100 in complex underwater environments.

[0055] The above embodiment may further include a sealing joint 180. A through-hole 1521 for the main cable 131 to pass through is defined on the side of the junction box 150 facing away from the anode body 120. The sealing joint 180 is mounted at the through-hole 1521 and sleeved over the main cable 131. The bend limiter 160 is sleeved over the sealing joint 180. The sealing joint 180, mounted at the through-hole 1521 of the junction box 150 and sleeved over the main cable 131, effectively prevents media such as seawater and silt from entering the interior of the junction box 150 through the gap between the main cable 131 and the through-hole 1521. This prevents oxidation and corrosion at the connection between the terminal 151 and the cable 130 caused by water or impurities intruding, greatly enhancing the stability and safety of the electrical connections within the junction box 150 and reducing the probability of faults such as short circuits. Bend limiter 160, mounted on the outside of sealing joint 180, not only limits excessive bending of main cable 131 but also provides additional physical protection for sealing joint 180, preventing it from loosening or being damaged by the frequent swinging and pulling of main cable 131, further ensuring the sealing effect. The synergistic effect of the two ensures that the entire seabed auxiliary anode device 100 maintains excellent sealing performance and structural stability despite the complex underwater fluid environment and mechanical stress. This ensures the long-term reliable operation of the current transmission system, reduces equipment maintenance costs and the risk of system failure, and significantly improves the protection capability and service life of the underwater impressed current cathodic protection system.

[0056] The above embodiment may also include an anode mounting frame 190. The anode mounting frame 190 includes a top plate 191 and a first side plate 192 and a second side plate 193 connected to opposite sides of the top plate 191. The anode mounting frame 190 can be removably mounted in the protective cover 110. The top of the protective cover 110 has an opening, the size of the opening matches that of the top plate 191. The top plate 191 covers the opening, and the anode body 120 is mounted between the two side plates. The anode mounting frame 190 can be removably mounted in the protective cover 110, making the installation, maintenance, and replacement of the anode body 120 more convenient and efficient. When the anode body 120 is damaged and requires maintenance, there is no need to perform complex disassembly of the entire protective cover 110. The anode mounting frame 190 only needs to be removed from the top opening of the protective cover 110 to quickly handle the anode body 120, which greatly shortens maintenance time and reduces maintenance difficulty and cost. The top plate 191, first side plate 192, and second side plate 193 of the anode mounting frame 190 form a stable frame structure that firmly secures the anode body 120 between the two side plates. This design effectively limits the shaking of the anode body 120 in the underwater environment, preventing the anode body 120 from shifting or colliding due to factors such as water flow impact, ensuring the stability of the connection between the anode body 120 and components such as the cable 130 and the wiring sleeve 140, and further ensuring the reliability of current transmission. At the same time, the matching design of the top plate 191 and the top opening of the protective cover 110 not only enhances the integrity of the internal structure of the protective cover 110, but also helps disperse external pressure, allowing the protective cover 110 to better withstand the mechanical stress brought by the complex underwater environment, thereby improving the structural strength and durability of the entire seabed-type auxiliary anode device 100.

[0057] The above embodiment may also include a first insulating flange 200 and a second insulating flange 210. The first insulating flange 200 is connected between the first end of the anode body 120 and the inner side of the first side plate 192. The junction box 150 is disposed on the outer side of the first side plate 192. The first side plate 192 has a cable hole for the branch cable 132 to pass through. The cable hole connects the interior of the anode body 120 and the interior of the junction box 150. The second insulating flange 210 is connected between the second end of the anode body 120 and the inner side of the second side plate 193. The first insulating flange 200 and the second insulating flange 210 are respectively connected to the ends of the anode body 120 and the inner side of the side plate, effectively isolating the current conduction between the anode body 120 and the anode mounting frame 190, preventing current shunting or abnormal leakage. This ensures that the current can be efficiently transmitted along the predetermined path through the cable 130 to the underwater equipment to be protected, significantly improving the current utilization efficiency and protection effectiveness of the cathodic protection system.

[0058] Furthermore, the first insulating flange 200 and the second insulating flange 210 can act as buffer components, effectively alleviating the hard contact and wear between the anode body 120 and the side plates caused by factors such as water flow impact and equipment vibration, thereby preventing damage to the surface coating of the anode body 120 and extending its service life. At the same time, the insulating flanges can also enhance the stability of the installation of the anode body 120, and together with the anode mounting frame 190, form a stable support structure to ensure that the anode body 120 remains in a fixed position in a complex underwater environment, further enhancing the structural stability of the entire device. Furthermore, the first insulating flange 200 and the second insulating flange 210 facilitate the disassembly process when the anode body 120 needs maintenance or replacement, reducing the impact on other components of the anode mounting frame 190, facilitating routine maintenance and troubleshooting of the equipment, reducing maintenance costs and time costs, and contributing to improving the overall reliability and operational efficiency of the underwater impressed current cathodic protection system.

[0059] In the above embodiment, the top plate 191 may have a plurality of filter holes 1911. The provision of the plurality of filter holes 1911 on the top plate 191 provides numerous technical advantages for the seabed-type auxiliary anode device 100. The filter holes 1911 allow water to flow smoothly, allowing the anode body 120 to fully contact the surrounding electrolyte solution, thereby ensuring the smooth conduction of the electrochemical reaction in the underwater impressed current cathodic protection system, ensuring the stable output of the protection current, and effectively improving the protection effect. At the same time, the apertures of these filter holes 1911 are rationally designed to prevent larger particles of impurities such as mud, sand, and marine organisms from entering the interior of the protective cover 110, preventing the anode body 120 and the cable 130 from becoming clogged or entangled, and avoiding problems such as current transmission obstruction or component damage caused by impurity accumulation, thereby extending the service life of the device. In addition, the filter holes 1911 can also promote fluid exchange inside and outside the protective cover 110, accelerate the dissipation of heat generated by the anode body 120 during operation, prevent the internal temperature from being too high due to heat accumulation, and affect the performance of the anode material and the stability of the electrical connection. It helps to maintain the seabed auxiliary anode device 100 operating in a suitable temperature environment and ensure the reliability and safety of the entire cathodic protection system.

[0060] In the above embodiment, the junction box 150 may include a housing 152, a cover 153, and an insulating gasket 154. The housing 152 has an installation opening, and the cover 153 is removably arranged to cover the installation opening. The insulating gasket 154 is disposed within the housing 152, and the terminal 151 is disposed on the insulating gasket 154. The insulating gasket 154 disposed within the housing 152 and the terminal 151 mounted on the insulating gasket 154 effectively isolates the terminal 151 from the housing 152, preventing current leakage and potential safety hazards caused by the housing 152 being energized, thereby ensuring the personal safety of operators. Furthermore, this insulation design reduces the likelihood of electrical failures and ensures the stable operation of the entire cathodic protection system. The removable cover 153 design facilitates inspection and maintenance of the junction box 150. When components such as the terminal 151 and the cable 130 need to be inspected or replaced, the cover 153 can be opened to perform the operation, improving maintenance efficiency and reducing maintenance costs.

[0061] The above embodiment may also include a sacrificial anode 220, which is disposed outside the protective cover 110 to provide electrochemical protection for the protective cover 110. As will be appreciated, the sacrificial anode 220 has a lower electrode potential than the material of the protective cover 110. In an underwater electrolyte environment, the sacrificial anode 220 preferentially undergoes an oxidation reaction, releasing electrons to form an electric current, causing the protective cover 110 to act as a cathode, thereby inhibiting the corrosion process of the protective cover 110 and effectively extending its service life. This design provides active protection for the protective cover 110, overcoming the limitations of purely physical protection. Even if the coating on the protective cover 110 is damaged, the sacrificial anode 220 continues to provide protection, ensuring that key components within the protective cover 110, such as the anode body 120 and cable 130, are protected from external corrosive media. In practical applications, the presence of the sacrificial anode 220 reduces the maintenance frequency and cost of the entire seabed-mounted auxiliary anode assembly 100. Compared to replacing or repairing a corroded protective cover 110, replacing the sacrificial anode 220 is simpler and less costly. At the same time, the sacrificial anode 220 works in conjunction with the seabed auxiliary anode device 100 in the impressed current cathodic protection system. The sacrificial anode 220 is responsible for the basic electrochemical protection of the protective cover 110, while the auxiliary anode focuses on providing protective current for the underwater main equipment that needs protection. The two complement each other, improving the comprehensive protection effect of the underwater cathodic protection system and ensuring the long-term stable operation of underwater facilities in complex environments.

[0062] In the above embodiment, the protective cover 110 may include a base 111, the bottom of the base 111 having a plurality of pointed structures 1111 for inserting into mud and sand, and the base 111 having a plurality of air holes 1112. The pointed structures 1111 can be inserted into the underwater mud and sand to preliminarily fix the entire seabed-type auxiliary anode device 100. The air holes 1112 provided at the bottom of the base 111 can avoid the problem of the seabed-type auxiliary anode device 100 floating during installation. It can be understood that since the protective cover 110 is a hollow structure and is easily affected by the buoyancy of water, the air holes 1112 can allow air to be discharged, reducing the buoyancy, allowing the protective cover 110 to sink more smoothly and fall into the water stably, reducing the risk of displacement caused by factors such as water flow, and improving installation efficiency. Secondly, these air holes 1112 can also facilitate the passage of surrounding electric field lines, so that current can pass through the sea mud under the base 111, thereby forming a loop with the protected body, making the protection more uniform. In this way, even if the seabed auxiliary anode device 100 is buried as a whole, it can continue to function, further ensuring the smooth progress of the electrochemical reaction, improving the efficiency of the cathodic protection system, and effectively protecting underwater equipment.

[0063] In addition, an embodiment of the present invention also provides an underwater impressed current cathodic protection system, including a constant potential meter, a cable fixing device 300 and the seabed auxiliary anode device 100 in the above embodiment, one end of the cable 130 is electrically connected to the seabed auxiliary anode device 100, and the other end is electrically connected to the constant potential meter; there are multiple cable fixing devices 300, and the multiple cable fixing devices 300 are arranged along the extension path of the cable 130 to fix multiple parts on the cable 130. The seabed auxiliary anode device 100 includes a protective cover 110, an anode body 120, a cable 130, a wiring sleeve 140, a junction box 150 and a bending limiter 160; the anode body 120 is arranged in the protective cover 110, and the anode body 120 is designed to be a hollow tubular structure and nested with the wiring sleeve 140, so that one end of the cable 130 is inserted into the wiring sleeve 140 and then electrically connected by pressing, and at the same time, epoxy filler 170 is poured into the inside of the anode body 120, which not only can stabilize the connection between the cable 130 and the wiring sleeve 140, but also can enhance the sealing and protection through the filler, and reduce the connection caused by The risk of loosening due to the influence of the external environment; secondly, a junction box 150 is provided in the protective cover 110, the interior of which is connected to the anode body 120. The cable 130 is inserted into the junction box 150 and fixed to the terminal 151. The junction box 150 is also filled with epoxy filler 170 to further strengthen the connection of the cable 130 and reduce the possibility of poor contact; finally, a bend limiter 160 is provided on the outer wall of the protective cover 110, and the cable 130 is inserted therein. The bend limiter 160 can effectively limit the floating range of the cable 130, avoid excessive bending of the cable 130, and reduce wear on the connection between the cable 130 and the auxiliary anode. The seabed auxiliary anode device 100 provided by the embodiment of the present invention improves the reliability of the connection between the cable 130 and the auxiliary anode through the above design, ensures the normal operation of the underwater external current cathodic protection system, and effectively enhances the protection effect of underwater equipment.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A seabed auxiliary anode device, characterized in that: Used in underwater impressed current cathodic protection systems, including protective covers, anode bodies, cables, junction sleeves, junction boxes and bend limiters; The anode body is disposed in the protective cover and is a hollow tubular structure. The wiring sleeve is nested in the anode body. One end of the cable is passed through the wiring sleeve in the anode body and is electrically connected to the wiring sleeve by pressing. The anode body is filled with epoxy filler. The junction box is arranged in the protective cover, the junction box is connected to one end of the anode body along its own axial direction, and the interior of the junction box is connected to the interior of the anode body, the cable is passed through the junction box, the junction box has a terminal post, the cable is fixed to the terminal post, and the junction box is filled with the epoxy filler; The bending limiter is arranged on the outer wall of the protective cover, and the cable is passed through the bending limiter.

2. The seabed auxiliary anode device according to claim 1, characterized in that: There are at least two anode bodies, and the cables include a main cable and at least two branch cables. The first ends of the branch cables are inserted into the corresponding anode bodies and fixedly and electrically connected to the wiring bushings. The second ends of the branch cables are inserted into the wiring box and fixedly and electrically connected to the wiring posts. One end of the main cable is passed through the junction box and is fixedly and electrically connected to the terminal post. The other end of the main cable passes through the bend limiter and then extends out of the protective cover.

3. The seabed auxiliary anode device according to claim 2, characterized in that: It also includes a sealing joint. The side of the junction box facing away from the anode body has a through hole for the main cable to pass through. The sealing joint is installed at the through hole and is sleeved outside the main cable. The bending limiter is sleeved outside the sealing joint.

4. The seabed auxiliary anode device according to claim 3, characterized in that: It also includes an anode mounting frame, which includes a top plate and a first side plate and a second side plate connected to opposite sides of the top plate. The anode mounting frame can be detachably installed in the protective cover. The top of the protective cover has an opening, the size of the opening matches the top plate, the top plate covers the opening, and the anode body is installed between the two side plates.

5. The seabed auxiliary anode device according to claim 4, characterized in that: It also includes a first insulating flange and a second insulating flange, the first insulating flange is connected between the first end of the anode body and the inner side of the first side plate, the junction box is arranged on the outer side of the first side plate, the first side plate has a wire hole for the branch cable to pass through, the wire hole connects the interior of the anode body and the interior of the junction box, and the second insulating flange is connected between the second end of the anode body and the inner side of the second side plate.

6. The seabed auxiliary anode device according to claim 5, characterized in that: The top plate is provided with a plurality of filtering holes.

7. The seabed auxiliary anode device according to claim 6, characterized in that: The junction box includes a shell, a cover plate and an insulating gasket. The shell has a mounting opening. The cover plate is detachably covered on the mounting opening. The insulating gasket is arranged in the shell, and the terminal is arranged on the insulating gasket.

8. The seabed auxiliary anode device according to any one of claims 1 to 7, characterized in that: It also includes a sacrificial anode, which is arranged outside the protective cover to perform electrochemical protection on the protective cover.

9. The seabed auxiliary anode device according to any one of claims 1 to 7, characterized in that: The protective cover comprises a base, the bottom of the base is provided with a plurality of sharp corner structures for inserting into mud and sand, and the base is provided with a plurality of air holes.

10. An underwater impressed current cathodic protection system, characterized in that: A device comprising a potentiostat, a cable fixing device, and the seabed auxiliary anode device according to any one of claims 1 to 9, wherein one end of the cable is electrically connected to the seabed auxiliary anode device, and the other end is electrically connected to the potentiostat; There are a plurality of cable fixing devices, and the plurality of cable fixing devices are arranged along the extension path of the cable to fix a plurality of locations on the cable.

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