Submarine cable grounding protection device and dynamic submarine cable system

Abstract

The invention relates to the technical field of submarine cables, and provides a submarine cable grounding protection device and a dynamic submarine cable system.The submarine cable grounding protection device comprises a protection pipe body, the protection pipe body is suitable for being arranged on a transition section between a dynamic section and a static section of a submarine cable in a sleeving mode, and the protection pipe body comprises a buffer layer, a reinforcing layer and a wear-resisting layer which are sequentially arranged from inside to outside; the reinforcing layer comprises a metal insert and reinforcing fibers and / or metal wires wound on the metal insert; the connecting piece is arranged at one end of the protection pipe body and fixedly connected with the metal insert, and the connecting piece is configured to be capable of being arranged on the outer side of the submarine cable in a sleeving mode and detachably assembled with an installation clamp fixed to the submarine cable. According to the submarine cable grounding protection device, the transition section is comprehensively protected from inside to outside, and the service life of the submarine cable is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of submarine cables, and particularly to a submarine cable ground contact protection device and a dynamic submarine cable system. Background Art

[0002] With the continuous advancement of marine resource development and marine engineering projects, such as offshore wind farms, deep-sea oil and gas development, transoceanic communication, etc., the use of submarine cables is becoming more and more extensive. In the early marine engineering, the design of submarine cables mainly focused on laying efficiency, reliability and cost, while ignoring the long-term risks of the section where the submarine cable contacts the seabed.

[0003] In practical applications, the dynamic sections of dynamic cables, umbilical cables and bundled cables are suspended in seawater, and the static cables are at the bottom of the seabed. When the submarine cable extends from the seabed to the upper equipment, bending, exposure and suspension will inevitably occur. The transition section between the static section and the dynamic section of the submarine cable is affected by water flow and marine activities, and undergoes long-term friction with gravel, rocks, marine organisms, etc. on the seabed, which is easy to cause wear or damage. Moreover, the transition section is long-term subjected to external impacts such as extrusion and impact and bending stress, which is easy to damage the core structure of the submarine cable, thus affecting the service life of the submarine cable. Summary of the Invention

[0004] The present invention provides a submarine cable ground contact protection device and a dynamic submarine cable system to solve the problem in the prior art that the transition section between the static section and the dynamic section of the submarine cable is easily damaged, affecting the service life of the submarine cable.

[0005] The present invention provides a submarine cable ground contact protection device, including: A protection pipe body adapted to be sleeved on the transition section between the dynamic section and the static section of the submarine cable. The protection pipe body includes a buffer layer, a reinforcement layer and a wear-resistant layer arranged in sequence from inside to outside. The reinforcement layer includes metal inserts and reinforcing fibers and / or metal wires wound around the metal inserts; A connecting member provided at one end of the protection pipe body and fixedly connected to the metal insert. The connecting member is configured to be sleeved on the outside of the submarine cable and is detachably assembled with a mounting fixture fixed on the submarine cable.

[0006] According to the submarine cable ground contact protection device provided by the present invention, the wear-resistant layer is wear-resistant rubber; and / or, the buffer layer is wear-resistant rubber.

[0007] According to the submarine cable ground contact protection device provided by the present invention, the wear-resistant layer is Hypalon rubber.

[0008] According to the submarine cable ground contact protection device provided by the present invention, the outer surface of the wear-resistant layer is provided with wear-resistant particles and / or a wear-resistant coating.

[0009] According to a submarine cable ground contact protection device provided by the present invention, the reinforcing fiber and the metal wire are spirally wound around the outer side of the metal insert.

[0010] According to a submarine cable ground contact protection device provided by the present invention, the reinforcing fiber is a nylon fiber cord, and the metal wire is a steel wire.

[0011] According to a submarine cable ground contact protection device provided by the present invention, the connecting piece is a first connecting flange, and the metal insert is fixedly connected to the first connecting flange.

[0012] According to a submarine cable ground contact protection device provided by the present invention, the first connecting flange has an installation end face away from the protection tube body, the buffer layer penetrates through the metal insert and the first connecting flange and turns over to the installation end face, and the buffer layer turned over to the installation end face is fixedly connected to the end face.

[0013] The present invention also provides a dynamic submarine cable system, including: a floating body platform, a submarine cable, a first installation fixture, and any one of the above cable ground contact protection devices; The submarine cable includes a dynamic section and a static section, the dynamic section is connected to the floating body platform, and the static section is fixed to the seabed; The submarine cable ground contact protection device is sleeved on the transition section between the dynamic section and the static section, the first installation fixture is fixed on the dynamic section, and the connecting piece is located at one end of the protection tube body facing the dynamic section and is assembled and connected to the first installation fixture.

[0014] According to a dynamic submarine cable system provided by the present invention, the first installation fixture is provided with a second connecting flange, and the second connecting flange is assembled and connected to the first connecting flange of the submarine cable ground contact protection device.

[0015] The submarine cable ground contact protection device and the dynamic submarine cable system provided by the present invention, by providing a protection tube body with a buffer layer, a reinforcing layer, and a wear-resistant layer, the protection tube body is fixedly connected to the connecting piece through the metal insert of the reinforcing layer. When in use, the transition section of the submarine cable is passed through the protection tube body and the connecting piece, and the connecting piece is connected to the installation fixture on the submarine cable. In a complex seabed environment, the buffer layer can absorb the external impact and stress received by the transition section to protect the core structure of the submarine cable; the reinforcing layer can improve the anti-bending, compressive, and tensile abilities of the transition section, and protect the transition section from fatigue damage caused by dynamic movement; the wear-resistant layer can improve the wear resistance of the transition section. The submarine cable ground contact protection device realizes the comprehensive protection of the transition section from the inside to the outside, and improves the service life of the submarine cable. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the submarine cable grounding protection device provided by the present invention.

[0018] Figure 2 It is a sectional view of the protection pipe body of the submarine cable grounding protection device provided by the present invention.

[0019] Figure 3 It is a partial schematic structural diagram of the dynamic submarine cable system provided by the present invention.

[0020] Figure 4 It is a schematic structural diagram of the dynamic submarine cable system provided by the present invention.

[0021] Reference numerals: 100, submarine cable grounding protection device; 11, protection pipe body; 111, buffer layer; 112, reinforcement layer; 113, wear-resistant layer; 12, connecting member; 121, installation end face; 200, first installation fixture; 21, second connecting flange; 31, dynamic section; 32, static section; 400, limiting device; 41, second installation fixture; 500, floating platform. Detailed implementation manners

[0022] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "first" and "second" are used for numbering product components for clear illustration and do not represent any substantial difference. The terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances. In addition, the meaning of "a plurality of" is two or more. In the specification and claims, "and / or" means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0024] The following will describe the subsea cable ground contact protection device and the dynamic subsea cable system of the present invention in conjunction with Figures 1 - 4 the description.

[0025] As Figure 1 and Figure 2 shown, the subsea cable ground contact protection device 100 provided by the embodiments of the present invention includes a protection tube body 11 and a connecting member 12. The protection tube body 11 is adapted to be sleeved on the transition section between the dynamic section 31 and the static section 32 of the subsea cable. The protection tube body 11 includes a buffer layer 111, a reinforcement layer 112, and a wear-resistant layer 113 arranged in sequence from the inside to the outside. The buffer layer 111 is adapted to be sleeved on the outside of the subsea cable. The reinforcement layer 112 includes metal inserts and reinforcing fibers and / or metal wires wound around the metal inserts. The connecting member 12 is arranged at one end of the protection tube body 11 and fixedly connected to the metal insert. The connecting member 12 is configured to be sleeved on the outside of the subsea cable and is detachably assembled with the installation fixture fixed on the subsea cable.

[0026] Among them, the protection tube body 11 is used to be sleeved on the transition section between the dynamic section 31 and the static section 32 of the subsea cable. The buffer layer 111 contacts the transition section, provides additional buffering for the transition section, absorbs external stress, and prevents external impact or bending stress from directly acting on the core structure of the subsea cable, ensuring the safety and long-term use of the subsea cable.

[0027] The wear-resistant layer 113 is used to contact the seabed, withstand the friction between the subsea cable and the seabed, can enhance the external protection of the subsea cable, reduce the wear and mechanical damage of the transition section, reduce the failure risk caused by wear and mechanical damage, and improve the reliability and safety of the subsea cable operation. The wear-resistant layer 113 can be made of a durable polymer material and has high elasticity and compressive and wear-resistant properties to ensure that the subsea cable is not damaged during long-term service in complex sea conditions.

[0028] The reinforcing layer 112 is embedded between the internal buffer layer 111 and the external wear-resistant layer 113, and includes metal inserts and reinforcing fibers and / or metal wires wound around the metal inserts. The reinforcing fibers or metal wires can be wound around the metal inserts according to the actual size and manufacturing process of the protection pipe body 11, or both the reinforcing fibers and metal wires can be wound simultaneously. The metal insert is a metal cylindrical part penetrating between the buffer layer 111 and the reinforcing layer 112, which can withstand negative pressure and has supportability, and has the ability to resist bending and external impacts. The reinforcing fibers and metal wires are wound on the outer side of the metal insert, which can improve the tensile and impact resistance of the reinforcing layer 112. In this way, the reinforcing layer 112 can enhance the bending resistance, compressive resistance and tensile resistance of the transition section, and prevent the submarine cable from being damaged due to frequent external pressure and tension in a complex seabed environment.

[0029] The connecting piece 12 is coaxially and fixedly connected to the protection pipe body 11. When installing the submarine cable ground protection device 100, the submarine cable is passed through the connecting piece 12 and the protection pipe body 11, so that the submarine cable ground protection device 100 is sleeved on the transition section between the static section 32 and the dynamic section 31 of the submarine cable. See Figure 3 . Among them, the connecting piece 12 is located at one end of the protection pipe body 11 facing the dynamic section 31 and is fixedly connected to the dynamic section 31, and the metal insert is fixedly connected to the connecting piece 12, which can ensure the reliable connection between the protection pipe body 11 and the connecting piece 12. When the submarine cable is subjected to an external impact, the metal insert bears the tensile force and impact force received by the transition section. Optionally, one end of the protection pipe body 11 facing the static section 32 is suspended, that is, not fixedly connected to the submarine cable, so as to avoid excessive tensile force on the metal insert.

[0030] The related technology is to add a protective structure on the outer side of the entire submarine cable, which increases the weight and volume of the submarine cable, resulting in an increase in the overall weight and diameter, affecting the convenience of laying, installation and transportation of the submarine cable. Especially in some scenarios with limited space, it will cause inconvenience, and also reduce the flexibility of the submarine cable, making it inflexible when bending or moving, and limiting the application scenarios of the submarine cable.

[0031] The submarine cable ground contact protection device 100 provided by the embodiment of the present invention is provided with a protection pipe body 11 having a buffer layer 111, a reinforcement layer 112 and a wear-resistant layer 113. The protection pipe body 11 is fixedly connected to the connecting member 12 through the metal insert of the reinforcement layer 112. When in use, the transition section of the submarine cable is passed through the protection pipe body 11 and the connecting member 12, and the connecting member 12 is connected to the mounting fixture on the submarine cable. In a complex seabed environment, the buffer layer 111 can absorb the external impact and stress received by the transition section to protect the core structure of the submarine cable; the reinforcement layer 112 can enhance the bending resistance, compressive resistance and tensile resistance of the transition section, and protect the transition section from fatigue damage caused by dynamic movement; the wear-resistant layer 113 can improve the wear resistance of the transition section. Thus, comprehensive protection of the transition section from the inside to the outside is achieved, and the service life of the submarine cable is prolonged. The protection pipe body 11 is fixedly connected to the connecting member 12 through the metal insert, ensuring the reliability of the connection between the protection pipe body 11 and the submarine cable. The detachable assembly of the connecting member 12 and the mounting fixture on the submarine cable makes the device modular, reducing the time and cost of installation and maintenance, and improving the practicability of the dynamic submarine cable system. In addition, using the submarine cable ground contact protection device 100 to protect the transition section of the submarine cable can reduce the overall weight of the submarine cable, not only playing a good protective role for the submarine cable, improving the ground contact stability and durability of the submarine cable, but also maintaining the overall flexibility of the submarine cable to adapt to various seabed terrains.

[0032] In the embodiment of the present invention, the wear-resistant layer 113 is wear-resistant rubber; and / or, the buffer layer 111 is wear-resistant rubber. The wear-resistant rubber endows the wear-resistant layer 113 and the buffer layer 111 with elasticity and wear resistance. The wear-resistant layer 113 and the buffer layer 111 are respectively tightly connected to the reinforcement layer 112.

[0033] Among them, the wear-resistant layer 113 is in direct contact with and rubs against the seabed, and the buffer layer 111 is in direct contact with and rubs against the submarine cable. Therefore, considering the different friction environments during their use, the wear-resistant rubbers used for the wear-resistant layer 113 and the buffer layer 111 are different. The wear-resistant rubber used for the wear-resistant layer 113 has better wear resistance than the wear-resistant rubber used for the buffer layer 111 to balance its elasticity, wear resistance, and the ability to resist external impact, extrusion or scratching, and protect the structure of the pipe body. The wear-resistant rubber used for the buffer layer 111 has better flexibility than the wear-resistant rubber used for the wear-resistant layer 113 to balance the flexibility and durability of the inner rubber layer.

[0034] Optionally, the wear-resistant layer 113 is Hypalon rubber (chlorosulfonated polyethylene rubber). Hypalon rubber is a synthetic rubber with excellent anti-friction performance. It can withstand long-term friction without being easily worn, can effectively resist the friction of the seabed, and is resistant to low temperature and corrosion, with high strength, high toughness and tear resistance, which is beneficial to prolong the service life of the submarine cable. Of course, the wear-resistant layer 113 can also be other types of wear-resistant rubber, such as neoprene or nitrile rubber, etc.

[0035] Optionally, the buffer layer 111 is natural rubber. Natural rubber not only has good wear resistance and excellent elasticity, so that on the premise of ensuring the wear resistance and cushioning properties of the buffer layer 111, the weight of the protection pipe body 11 can be reduced, thereby reducing the installation difficulty and cost, and reducing the load on the submarine cable by the submarine cable ground protection device 100. It should be noted that the buffer layer can also be made of non-rubber materials such as polyurethane.

[0036] In some optional embodiments, wear-resistant particles and / or wear-resistant coatings are provided on the outer surface of the wear-resistant layer 113. Specifically, wear-resistant particles or wear-resistant coatings can be provided on the outer surface of the wear-resistant layer 113; or wear-resistant particles and wear-resistant coatings can be provided simultaneously. The wear-resistant coating is attached to the surface of the wear-resistant layer 113 and / or the wear-resistant particles through a surface treatment process. The wear-resistant particles and the wear-resistant coating form an external protection structure of the wear-resistant layer 113, further improving the wear resistance of the submarine cable ground protection device 100 and extending its service life.

[0037] Among them, the wear-resistant particles can be integrally formed with the wear-resistant layer 113. For example, if the wear-resistant layer 113 is Hypalon rubber, the wear-resistant particles are also Hypalon rubber. Alternatively, the wear-resistant particles are embedded in the wear-resistant layer 113, and the wear-resistant particles can be made of a material with higher hardness.

[0038] In the embodiments of the present invention, the metal insert is resistant to negative pressure and has supportability. On the basis of being able to resist a certain degree of bending, it has a certain bending performance, so that the transition section can transition from the bottom of the seabed to the dynamic section 31 in a relatively gentle state. Optionally, the metal insert can be a stainless steel part.

[0039] In some optional embodiments, the reinforcing fibers and the metal wires are helically wound around the outside of the metal insert. When the protection pipe body 11 is subjected to an external load, the helically wound reinforcing fibers and metal wires can effectively disperse the axial stress and circumferential stress received by the protection pipe body 11, limit the radial and axial deformation of the protection pipe body 11, thereby significantly improving the tensile strength and compressive capacity of the protection pipe body 11 and increasing the fatigue life of the protection pipe body. The reinforcing fibers and the metal wires are helically wound around the outside of the metal insert, which can effectively bear the stress and at the same time avoid excessive increase in the stiffness of the protection pipe body 11, so that the reinforcing layer 112 maintains a certain bending performance.

[0040] It should be noted that the reinforcing fibers and the metal wires can also be wound around the outside of the metal insert through a weaving process.

[0041] In a specific embodiment, the reinforcing fiber is a nylon fiber cord, which has strong tensile properties and can be well combined with rubber. In the case where the size of the protection pipe body 11 is small, the nylon fiber cord can be helically wound around the metal insert to form the reinforcing layer 112.

[0042] In a specific embodiment, the wire is a steel wire, and a steel wire with relatively high stiffness can be used. When the size of the protective pipe body 11 is relatively large, the steel wire can be spirally wound around the metal insert to form the reinforcing layer 112. Of course, according to actual needs, nylon fiber cord and steel wire can also be spirally wound around the metal insert simultaneously.

[0043] In some embodiments of the present invention, the connecting member 12 is a first connecting flange. Refer to Figure 1 . The metal insert is fixedly connected to the first connecting flange. Among them, the metal insert can be welded to the first connecting flange, or the metal insert and the first connecting flange are connected by fasteners. The first connecting flange is used for assembling and connecting with the second connecting flange 21 of the mounting fixture fixed on the submarine cable.

[0044] It should be noted that the connecting member 12 in the embodiments of the present invention is not limited to the connecting structure of the first connecting flange. For example, the connecting member 12 can also be a mounting fixture that can be directly fixed to the submarine cable. Optionally, the first connecting flange is a stainless steel flange.

[0045] Optionally, a circumferentially extending annular flange is provided on the periphery of one end of the metal insert, and the metal insert is conveniently fixedly connected to the first connecting flange through the annular flange.

[0046] Optionally, the end of the wear-resistant layer 113 is fixedly connected to the end face of the first connecting flange.

[0047] Furthermore, the first connecting flange has a mounting end face 121 away from the protective pipe body 11. The buffer layer 111 penetrates through the metal insert and the first connecting flange and turns over to the mounting end face 121, and the buffer layer 111 turned over to the mounting end face 121 is fixedly connected to the mounting end face 121.

[0048] Specifically, the reinforcing layer 112 is connected to one side of the metal insert, and the first connecting flange is connected to the other side of the metal insert. One end of the buffer layer 111 protrudes from the reinforcing layer 112 and the wear-resistant layer 113, and passes through the metal insert and the first connecting flange. The protruding buffer layer 111 turns outwards and fits and fixes with the mounting end face 121 of the first connecting flange. In this way, a part of the buffer layer 111 is located between the first connecting flange and the submarine cable. When bending and torsion occur at the position of the submarine cable corresponding to the first connecting flange, the buffer layer 111 can avoid the shear stress caused by the first connecting flange to the submarine cable, enable the submarine cable at this place to adapt to the dynamic movement of the submarine cable, avoid stress concentration, thereby protecting the submarine cable from fatigue damage caused by dynamic movement, improving the bending fatigue life of the submarine cable, and reducing the failure risk.

[0049] Among them, the buffer layer 111 can be fixed to the mounting end face 121 of the first connecting flange by a fluidization process, or fixed to the mounting end face 121 of the first connecting flange by fasteners.

[0050] As shown Figure 4 in the figure, an embodiment of the present invention further provides a dynamic submarine cable system. The dynamic submarine cable system includes a floating body platform, a submarine cable, a first installation fixture 200, and any one of the above-mentioned submarine cable ground contact protection devices 100. The submarine cable includes a dynamic section 31 and a static section 32. The dynamic section 31 is connected to the floating body platform, and the static section 32 is fixed to the seabed. The submarine cable ground contact protection device 100 is sleeved on the transition section between the dynamic section 31 and the static section 32, and the first installation fixture 200 is fixed to the dynamic section 31. The connecting member 12 is located at one end of the protection pipe body 11 facing the dynamic section 31 and is assembled and connected to the first installation fixture 200.

[0051] Among them, a power generation device such as a wind turbine is provided on the floating body platform, and the power generation device is electrically connected to the dynamic section 31 of the submarine cable. When installing the submarine cable ground contact protection device 100, the first installation fixture 200 and the submarine cable ground contact protection device 100 are sleeved on the submarine cable. The first installation fixture 200 is located at one end of the submarine cable ground contact protection device 100 close to the floating body platform. After determining the ground contact transition section of the submarine cable, the first installation fixture 200 is fixed to the dynamic section 31, and then the connecting member 12 is assembled and fixed to the first installation fixture 200.

[0052] Among them, the first installation fixture 200 is provided with a second connecting flange 21, and the second connecting flange 21 is assembled and connected to the first connecting flange of the submarine cable ground contact protection device, realizing the convenient installation of the submarine cable ground contact protection device 100 and the submarine cable. The first installation fixture 200 can adopt the installation fixtures commonly used in the current submarine cable system.

[0053] Furthermore, the dynamic submarine cable system further includes a limiting device 400. The limiting device 400 is fixed to the seabed. A second installation fixture 41 is provided on the limiting device 400, and the static section 32 is fixedly connected to the second installation fixture 41. One end of the protection pipe body 11 of the submarine cable ground contact protection device 100 away from the first installation fixture 200 is spaced from the limiting device 400 to ensure good bending performance and torsional performance of the submarine cable between the submarine cable ground contact protection device 100 and the limiting device 400.

[0054] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A submarine cable ground contact protection device, characterized in that, Comprising: A protective pipe body, adapted to be sleeved on the transition section between the dynamic section and the static section of the submarine cable. The protective pipe body includes a buffer layer, a reinforcement layer, and a wear-resistant layer arranged in sequence from the inside to the outside. The reinforcement layer includes metal inserts and reinforcing fibers and / or metal wires wound around the metal inserts. A connecting member, arranged at one end of the protective pipe body and fixedly connected to the metal insert. The connecting member is configured to be sleeved on the outside of the submarine cable and is detachably assembled with a mounting fixture fixed on the submarine cable.

2. The submarine cable ground contact protection device according to claim 1, characterized in that, The wear-resistant layer is wear-resistant rubber; and / or, the buffer layer is wear-resistant rubber.

3. The submarine cable grounding protection device according to claim 2, characterized in that, The wear-resistant layer is Hypalon rubber.

4. The submarine cable grounding protection device according to claim 1, characterized in that, The outer surface of the wear-resistant layer is provided with wear-resistant particles and / or a wear-resistant coating.

5. The submarine cable grounding protection device according to claim 1, characterized in that, The reinforcing fibers and metal wires are spirally wound around the outside of the metal insert.

6. The submarine cable grounding protection device according to claim 1, characterized in that, The reinforcing fibers are nylon fiber cords, and the metal wires are steel wires.

7. The submarine cable ground contact protection device according to claim 1, characterized in that, The connecting member is a first connecting flange, and the metal insert is fixedly connected to the first connecting flange.

8. The submarine cable ground contact protection device according to claim 7, characterized in that The first connecting flange has a mounting end face away from the protective pipe body. The buffer layer penetrates through the metal insert and the first connecting flange and turns over to the mounting end face, and the buffer layer turned over to the mounting end face is fixedly connected to the end face.

9. A dynamic submarine cable system, characterized in that, Comprising: A floating body platform, a submarine cable, a first mounting fixture, and a submarine cable ground contact protection device according to any one of claims 1-8; The submarine cable includes a dynamic section and a static section. The dynamic section is connected to the floating body platform, and the static section is fixed to the seabed; The submarine cable ground contact protection device is sleeved on the transition section between the dynamic section and the static section. The first mounting fixture is fixed on the dynamic section, and the connecting member is located at one end of the protective pipe body facing the dynamic section and is assembled and connected to the first mounting fixture.

10. The dynamic submarine cable system according to claim 9, characterized in that, The first mounting fixture is provided with a second connecting flange, and the second connecting flange is assembled and connected to the first connecting flange of the submarine cable ground contact protection device.

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