Dynamic submarine cable seabed limiting device and offshore floating system

Abstract

The invention relates to the technical field of dynamic submarine cable underwater protection, and provides a dynamic submarine cable seabed limiting device and an offshore floating type system.The dynamic submarine cable seabed limiting device comprises a base and a connector box; one end of the connector box is fixedly connected with the static section of the dynamic submarine cable, and the other end is fixedly connected with the dynamic section of the dynamic submarine cable; the base comprises a frame and a limiting support assembly. The frame is used for being fixed in a seabed, the limiting support assembly is arranged on the side, away from the seabed, of the frame, the frame is provided with a groove, and the connector box is slidably arranged in the groove; the limiting support assembly is used for pressing the connector box and can abut against the connecting end of the connector box and the static section to form constraint. The submarine limiting device for the dynamic submarine cable can limit the single-side movement and height direction of the static section of the connector box, so that the pulling force borne by the static section is not transmitted to the dynamic section, the dynamic section is ensured not to be influenced in the construction process, the fatigue damage of the dynamic section is delayed, and the service life of the dynamic submarine cable is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater protection of dynamic submarine cables, and in particular to a submarine limiting device for a dynamic submarine cable and an offshore floating system. Background Art

[0002] Dynamic submarine cable is a submarine cable used for floating offshore structures, with relevant buoyancy elements, and allowed to move within a certain range in the water following the floating body. Dynamic submarine cables are divided into dynamic sections and static sections. The dynamic section has two or more layers of armor, and is suspended from the floating structure on the sea surface to the seabed through the action of accessories such as counterweights and buoyancy blocks. During its service life, it continuously withstands the impact of waves, ocean currents, and the shaking caused by the floating body. Therefore, while ensuring the structural strength, higher requirements are placed on the bending stiffness performance and fatigue performance. The static section is an ordinary submarine cable, buried deep under the seabed, and does not withstand repeated alternating bending and axial tension.

[0003] Existing dynamic submarine cables usually adopt a lazy wave configuration, that is, the dynamic submarine cable is arranged in a wave shape underwater to adapt to the changes in ocean currents. During the construction of the dynamic submarine cable, the dynamic section is constructed first, and then the static section is constructed from the dynamic section. At present, the dynamic submarine cable submarine anchoring equipment is mainly used to limit and fix the dynamic submarine cable. Since there is a large tension between the static section and the traction system of the construction ship during the construction, the static section of the submarine cable will be subjected to axial tension. Although the submarine anchoring equipment is used for limiting and fixing, the direction of the limit is opposite to the tensile force received, and sudden situations may be encountered during the construction process. Wind, waves, ocean currents or other human factors will generate sudden stress. This stress directly acts on the static section and is transmitted to the dynamic section, affecting the life of the dynamic section. Moreover, after being pulled axially, although the waveform constructed by the dynamic submarine cable in the water can absorb most of the displacement, after being stretched and contracted axially, the entire dynamic cable waveform will produce unnecessary fluctuations, and the fluctuations will cause mechanical fatigue in the dynamic section. This fatigue will exist throughout the entire construction cycle, seriously affecting the expected life of the dynamic section. Summary of the invention

[0004] The present invention provides a dynamic submarine cable seabed limiting device and an offshore floating system, which are used to solve the problem in the prior art that the tension and sudden stress of the construction ship traction system affect the dynamic section of the submarine cable, resulting in a reduced service life of the dynamic section of the submarine cable.

[0005] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: In a first aspect, the present invention provides a dynamic submarine cable seabed limiting device, comprising: a base and a joint box; One end of the joint box is fixedly connected to the static section of the dynamic submarine cable, and the other end is fixedly connected to the dynamic section of the dynamic submarine cable; The base includes a frame and a limiting bracket assembly; The frame is used to be fixed in the seabed, the limiting bracket assembly is arranged on a side of the frame away from the seabed, the frame has a groove, and the joint box is slidably arranged in the groove; The limiting bracket assembly is used to press the joint box and can abut against the connection end of the joint box and the static section to form a constraint.

[0006] According to a dynamic submarine cable seabed limiting device provided by the present invention, the limiting bracket assembly includes a first vertical rod and a second vertical rod; The first vertical rod and the second vertical rod are vertically arranged at one end of the groove close to the static section, the first vertical rod and the second vertical rod are spaced apart, and the distance between the first vertical rod and the second vertical rod is smaller than the outer diameter of the joint box and is used for the static section to pass through; And / or, the position-limiting bracket assembly includes a first guide rod and a second guide rod; One end of the first guide rod is connected to the first vertical rod, the other end of the first guide rod is connected to the frame, one end of the second guide rod is connected to the second vertical rod, and the other end of the second guide rod is connected to the frame; Along the axial direction of the connection box extending from the static section toward the dynamic section, the first guide rod and the second guide rod are inclined toward the frame, and the distance between the first guide rod and the second guide rod gradually decreases.

[0007] According to a dynamic submarine cable seabed limiting device provided by the present invention, the limiting bracket assembly further includes a third guide rod and a fourth guide rod; The third guide rod and the fourth guide rod are arranged on the frame, the distance between the third guide rod and the fourth guide rod is smaller than the outer diameter of the joint box, and at least part of the third guide rod and the fourth guide rod are pressed on the joint box.

[0008] According to a dynamic submarine cable submarine limit device provided by the present invention, along the axial direction of the connecting box extending from the dynamic section toward the static section, the third guide rod and the fourth guide rod are inclined toward the frame, and the distance between the third guide rod and the fourth guide rod gradually decreases.

[0009] According to a dynamic submarine cable seabed limiting device provided by the present invention, the limiting bracket assembly further includes a supporting rod; There are multiple support rods, one end of each of the support rods is connected to the third guide rod or the fourth guide rod, and the other end of each of the support rods is connected to the frame.

[0010] According to a dynamic submarine cable seabed limiting device provided by the present invention, a counterweight block is provided on a side of the frame away from the seabed; There are a plurality of counterweight blocks, and the plurality of counterweight blocks are arranged at intervals; And / or, the ballast block is provided inside a concrete material or a ballast material having a density greater than seawater; And / or, the base further comprises: a metal plate; The metal plate is arranged on a side of the frame away from the seabed, and the metal plate is used to determine the inclination rate of the base.

[0011] According to a dynamic submarine cable seabed limiting device provided by the present invention, a metal plate is provided on a side of the frame close to the seabed; The metal plate is provided with a plurality of drainage holes, and the drainage holes are evenly spaced and arranged on the metal plate.

[0012] According to a dynamic submarine cable seabed limiting device provided by the present invention, the base further comprises: a plug plate; The plug plate is arranged on a side of the metal plate close to the seabed, the plug plate is arranged vertically to the metal plate, and the plug plate is used to be plugged into the seabed.

[0013] According to a dynamic submarine cable seabed limiting device provided by the present invention, the frame is provided with a mounting lug; The mounting lug is arranged vertically with respect to the frame; And / or, the frame is provided with transport lifting lugs; The transport lifting lug is arranged obliquely to the frame.

[0014] In a second aspect, the present invention provides an offshore floating system, comprising: a dynamic submarine cable and a seabed limiting device for the dynamic submarine cable; The joint box connects the dynamic section and the static section of the dynamic submarine cable.

[0015] The submarine limiting device and offshore floating system of the dynamic submarine cable provided by the present invention connect the static section and the dynamic section of the dynamic submarine cable by setting a joint box, and set a frame and a limiting bracket assembly on the base, and set a groove on the frame, and the limiting bracket assembly is used to constrain the connection end of the joint box and the static section, and the groove wall and the vertical surface of the groove and the frame also constrain the joint box. At the same time, the limiting bracket assembly can also press the joint box to constrain the height direction of the joint box, so that the movement of the joint box from the dynamic section to the static section and the movement along the height direction of the frame are limited, so that the static section is subjected to pulling force during construction, or when sudden stress during construction acts on the static section, the limiting device can limit the unilateral movement and height direction of the static section of the joint box, so that the pulling force borne by the static section will not be transmitted to the dynamic section, thereby ensuring that the dynamic section is not affected during the construction process, delaying fatigue damage of the dynamic section, and improving the service life of the dynamic submarine cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or 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 creative work.

[0017] Figure 1 The invention provides a schematic diagram of the installation of a dynamic submarine cable seabed limiting device and a dynamic submarine cable.

[0018] Figure 2 This is one of the three-dimensional structural schematic diagrams of the dynamic submarine cable seabed limiting device provided by the present invention.

[0019] Figure 3 This is the second schematic diagram of the three-dimensional structure of the dynamic submarine cable seabed limiting device provided by the present invention.

[0020] Figure 4 The present invention provides Figure 3 A partial enlarged view of the K section.

[0021] Figure 5 This is the third three-dimensional structural schematic diagram of the dynamic submarine cable seabed limiting device provided by the present invention.

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the connection box provided by the present invention and the dynamic section and the static section.

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the counterweight block provided by the present invention.

[0024] Reference numerals: 1. Dynamic submarine cable submarine limit device; 11. base; 12. joint box; 111. frame; 112. limit bracket assembly; 113. counterweight; 114. metal plate; 115. metal plate; 116. plug plate; 117. installation eye; 118. transport eye; 1111. groove; 1121. first vertical rod; 1122. second vertical rod; 1123. first guide rod; 1124. second guide rod; 1125. third guide rod; 1126. fourth guide rod; 1127. support rod; 1131. eye; 1151. drainage hole; 2. Dynamic submarine cable; 21. Static section; 22. Dynamic section; 3. Counterweight assembly; 4. Buoyancy block; 5. Mooring rope; 6. Construction ship; Ⅰ. Sea level; Ⅱ. Sea bed. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Combine the following Figures 1 to 7 , the dynamic submarine cable seabed limiting device and the offshore floating system provided by the embodiments of the present invention are described in detail through specific embodiments and their application scenarios.

[0027] First, as Figure 1 , Figure 2 Figure 3 , Figure 4 and Figure 6 As shown, this embodiment provides a dynamic submarine cable seabed limiting device 1, including: a base 11 and a joint box 12.

[0028] One end of the joint box 12 is fixedly connected to the static section 21 of the dynamic submarine cable 2 , and the other end of the joint box 12 is fixedly connected to the dynamic section 22 of the dynamic submarine cable 2 .

[0029] The base 11 includes a frame 111 and a limiting bracket assembly 112 .

[0030] The frame 111 is used to be fixed in the seabed II. The limiting bracket assembly 112 is arranged on the side of the frame 111 away from the seabed II. The frame 111 has a groove 1111, and the joint box 12 is slidably arranged in the groove 1111.

[0031] The limiting bracket assembly 112 is used to press the joint box 12 and can abut against the connection end of the joint box 12 and the static section 21 to form a constraint.

[0032] It is understandable that the joint box 12 is used to connect the dynamic section 22 and the static section 21 of the dynamic submarine cable 2 to ensure the overall optoelectronic continuity and mechanical continuity of the dynamic submarine cable 2, and also to ensure the waterproof effect of the dynamic section 22 and the static section 21 at the connection.

[0033] The frame 111 is used to provide an installation support for the joint box 12, and the frame 111 is fixedly connected to the seabed II by its own gravity. Optionally, the frame 111 can be inserted and fixed to the seabed II, the frame 111 can also be fixed to the seabed II by a suction anchor, and the frame 111 can also be fixed to the seabed II by a pile leg.

[0034] The groove 1111 is arranged to extend along the axial direction of the joint box 12, the first end of the groove 1111 is arranged at the position where the limit bracket assembly 112 constrains the joint box 12, and the second end of the groove 1111 passes through the other side of the frame 111. The groove wall and the groove bottom of the groove 1111 are sunken into the surface of the frame 111, and a stop surface is formed along the radial direction of the first end of the groove 1111 and the vertical surface of the frame 111, which can limit the movement of the lower part of the joint box 12.

[0035] Specifically, the groove wall of the groove 1111 of this embodiment is configured as an arc-shaped surface, and the arc-shaped surface is more closely fitted to the arc-shaped outer wall of the joint box 12 , which is beneficial to the limiting effect of the groove 1111 on the joint box 12 .

[0036] The position-limiting bracket assembly 112 of the present embodiment can be limited by a combination structure of plates, a combination structure of rods, or a combination of position-limiting blocks.

[0037] When the joint box 12 is installed into the groove 1111, the connection end of the joint box 12 and the static section 21 is close to the first end of the groove 1111, and the connection end of the joint box 12 and the dynamic section 22 is close to the second end of the groove 1111. The accommodating space formed by the groove bottom and the groove wall of the groove 1111 accommodates the part of the joint box 12 close to the groove bottom. With the pulling force of the construction ship 6, the joint box 12 slides along the extension direction of the groove 1111 to the constraint of the limiting bracket assembly 112. The limiting bracket assembly 112 constrains the joint box 12 in the horizontal direction and the height direction, so that the connection end of the joint box 12 and the static section 21 cannot move in the direction of the static section 21, and the joint box 12 cannot be separated from the frame 111 in the height direction, thereby realizing the constraint of the joint box 12 by the limiting bracket assembly 112, so that the pulling force of the construction ship 6 cannot pass through the joint box 12 and be transmitted from the static section 21 to the dynamic section 22, so that the dynamic section 22 will not be repeatedly bent due to force, thereby reducing the wear and damage of the dynamic section 22 during the construction process.

[0038] In practical applications, such as Figure 1 As shown, the dynamic submarine cable 2 floats on the sea and is moored by a mooring rope 5, with a buoyancy block 4 and a counterweight assembly 3. The dynamic submarine cable seabed limit device 1 is installed at the connection between the dynamic section 22 and the static section 21. The limit device abuts against the seabed II by gravity and is embedded in the seabed II for fixation. The junction box 12 is installed on the base 11. When the construction ship 6 is working, the limit device bears the tension of the construction ship 6 to ensure that the line shape of the dynamic section 22 is not affected by fluctuations. Therefore, the construction ship 6 can speed up the laying speed without considering the impact of the excessively fast laying speed on the dynamic submarine cable 2. In addition, when encountering emergencies during the construction process, such as wind, waves, ocean currents or other human factors, the limit device will bear the sudden stress generated by the static section 21 to protect the dynamic section 22 from being affected.

[0039] The dynamic submarine cable submarine limiting device 1 provided by the present invention connects the static section 21 and the dynamic section 22 of the dynamic submarine cable 2 by setting a joint box 12, and sets a frame 111 and a limiting bracket assembly 112 on the base 11, and sets a groove 1111 on the frame 111, and the limiting bracket assembly 112 is used to constrain the connection end of the joint box 12 and the static section 21, and the groove wall of the groove 1111 and the vertical surface of the frame 111 also constrain the joint box 12 to be set, and at the same time, the limiting bracket assembly 112 can also press the joint box 12 to form a height direction of the joint box 12. The limit device forms a constraint, so that the movement of the joint box 12 from the dynamic section 22 to the static section 21 and the movement along the height direction of the frame 111 are limited, so that when the static section 21 is subjected to pulling force during construction, or when sudden stress during construction acts on the static section 21, the limit device can limit the unilateral movement and height direction of the static section 21 of the joint box 12, so that the pulling force borne by the static section 21 will not be transmitted to the dynamic section 22, thereby ensuring that the dynamic section 22 is not affected during the construction process, delaying the fatigue damage of the dynamic section 22, and increasing the service life of the dynamic submarine cable 2.

[0040] In some embodiments, Figure 3 and Figure 4 As shown, the position-limiting bracket assembly 112 of this embodiment includes a first vertical rod 1121 and a second vertical rod 1122 .

[0041] The first vertical rod 1121 and the second vertical rod 1122 are erected at one end of the groove 1111 close to the static section 21 , and the first vertical rod 1121 and the second vertical rod 1122 are spaced apart, and the distance between the first vertical rod 1121 and the second vertical rod 1122 is smaller than the outer diameter of the joint box 12 and is used for the static section 21 to pass through.

[0042] It can be understood that the first vertical rod 1121 and the second vertical rod 1122 of the present embodiment form a constraint position of the connection end between the joint box 12 and the static section 21. Since the spacing between the first vertical rod 1121 and the second vertical rod 1122 is smaller than the outer diameter of the joint box 12, when the static section 21 of the joint box 12 is subjected to tension, the joint box 12 is stopped by the first vertical rod 1121 and the second vertical rod 1122, and the spacing between the first vertical rod 1121 and the second vertical rod 1122 enables the static section 21 to pass through. Moreover, since the first vertical rod 1121 and the second vertical rod 1122 are arranged at one end of the groove 1111 close to the static section 21, the groove 1111 and the first vertical rod and the second vertical rod jointly stop the connection end between the joint box 12 and the static section 21, thereby improving the reliability of the stop.

[0043] In this embodiment, a first vertical rod 1121 and a second vertical rod 1122 are arranged. The gap between the first vertical rod 1121 and the second vertical rod 1122 allows the static section 21 to pass through and blocks the junction box 12 from passing through, thereby achieving unilateral limitation of the junction box 12 without affecting the laying of the dynamic section 22. The structure is simple and easy to construct.

[0044] In some embodiments, Figure 3 and Figure 4 As shown, the limiting bracket assembly 112 of this embodiment includes a first guide rod 1123 and a second guide rod 1124 .

[0045] One end of the first guide rod 1123 is connected to the first vertical rod 1121 , and the other end of the first guide rod 1123 is connected to the frame 111 ; one end of the second guide rod 1124 is connected to the second vertical rod 1122 , and the other end of the second guide rod 1124 is connected to the frame 111 .

[0046] Along the axial direction of the joint box 12 extending from the static section 21 toward the dynamic section 22, the first guide rod 1123 and the second guide rod 1124 are inclined toward the frame 111, and the distance between the first guide rod 1123 and the second guide rod 1124 gradually decreases.

[0047] It can be understood that the first guide rod 1123 and the second guide rod 1124 of this embodiment are arranged in the area where the laying path from the connection end of the joint box 12 and the static section 21 to the static section 21 is located on the frame 111. Based on the direction from the static section 21 to the dynamic section 22, the first guide rod 1123 and the second guide rod 1124 gradually decrease in the height direction, and the spacing between the first guide rod 1123 and the second guide rod 1124 gradually decreases, so that the first guide rod 1123 and the second guide rod 1124 gradually get closer, and the first guide rod 1123 and the second guide rod 1124 gradually get closer. The height and width of the first guide channel between the guide rod 1123 and the second guide rod 1124 gradually decrease. When the junction box 12 and the static section 21 and the dynamic section 22 are installed on the frame 111, the junction box 12 enters the groove 1111 along the first guide channel. The gradual setting of the first guide channel allows the junction box 12 and the dynamic submarine cable 2 to be installed in place under the guidance of the first guide rod 1123 and the second guide rod 1124 in the height and length directions during installation. There is no need to require excessively high installation accuracy, which reduces the difficulty of construction.

[0048] In some embodiments, Figure 3 and Figure 4 As shown, the limiting bracket assembly 112 of this embodiment further includes a third guide rod 1125 and a fourth guide rod 1126 .

[0049] The third guide rod 1125 and the fourth guide rod 1126 are disposed on the frame 111 . The distance between the third guide rod 1125 and the fourth guide rod 1126 is smaller than the outer diameter of the joint box 12 , and at least a portion of the third guide rod 1125 and the fourth guide rod 1126 are pressed on the joint box 12 .

[0050] It is understandable that the third guide rod 1125 and the fourth guide rod 1126 are located at the connection end of the joint box 12 and the static section 21 , and are pressed on the joint box 12 to limit the height direction of the joint box 12 .

[0051] Specifically, the third guide rod 1125 of the present embodiment is mounted on the first vertical rod 1121, and the fourth guide rod 1126 is mounted on the second vertical rod 1122. The third guide rod 1125 and the fourth guide rod 1126 are connected to the first vertical rod 1121 and the second vertical rod 1122. The third guide rod 1125 and the fourth guide rod 1126 are pressed on the junction box 12 to limit the height direction of the junction box 12. When the junction box 12 and the static section 21 are subjected to tension in the height direction, since the spacing between the third guide rod 1125 and the fourth guide rod 1126 is smaller than the spacing between the junction box 12, the junction box 12 cannot pass through the spacing between the third guide rod 1125 and the fourth guide rod 1126, thereby limiting the movement of the junction box 12 and the dynamic submarine cable 2 in the height direction.

[0052] In this embodiment, a third guide rod 1125 and a fourth guide rod 1126 are arranged, and parts of the third guide rod 1125 and the fourth guide rod 1126 are pressed onto the joint box 12, so that the connection end between the joint box 12 and the static section 21 is limited in the height direction. The structure is simple, and the arrangement of the rod body does not affect the passage of seawater, thereby conveniently realizing the limitation of the height direction of the joint box 12, and the construction is easy and the operation is simple.

[0053] In some embodiments, Figure 3 and Figure 4 As shown, in this embodiment, along the axial direction of the joint box 12 extending from the dynamic section 22 toward the static section 21, the third guide rod 1125 and the fourth guide rod 1126 are inclined toward the frame 111, and the distance between the third guide rod 1125 and the fourth guide rod 1126 gradually decreases.

[0054] It can be understood that the third guide rod 1125 and the fourth guide rod 1126 of the present embodiment are arranged in the area where the laying path from the connection end of the joint box 12 and the dynamic section 22 to the dynamic section 22 is located on the frame 111. Based on the direction from the dynamic section 22 to the static section 21, the third guide rod 1125 and the fourth guide rod 1126 gradually descend in the height direction, and the spacing between the third guide rod 1125 and the fourth guide rod 1126 gradually decreases, so that the third guide rod 1125 and the fourth guide rod 1126 gradually get closer, and the third guide rod 1125 and the fourth guide rod 1126 gradually get closer. The height and width of the second guide channel between the guide rod 1125 and the fourth guide rod 1126 gradually decrease. When the junction box 12 and the static section 21 and the dynamic section 22 are installed on the frame 111, the junction box 12 enters the groove 1111 along the second guide channel. The gradual setting of the second guide channel allows the junction box 12 and the dynamic submarine cable 2 to be installed in place under the guidance of the third guide rod 1125 and the fourth guide rod 1126 in the height and length directions during installation. There is no need to require excessively high installation accuracy, which reduces the difficulty of construction.

[0055] In some embodiments, Figure 3 and Figure 4 As shown, the limiting bracket assembly 112 of this embodiment also includes a support rod 1127.

[0056] A plurality of support rods 1127 are provided, one end of each of the plurality of support rods 1127 is connected to the third guide rod 1125 or the fourth guide rod 1126 , and the other end of each of the plurality of support rods 1127 is connected to the frame 111 .

[0057] It is understandable that one end of the support rod 1127 is connected to the frame 111, and the other end is connected to the third guide rod 1125 or the fourth guide rod 1126, or the other end is connected to the first vertical rod 1121 or the second vertical rod 1122, or the other end is connected to the first guide rod 1123 or the second vertical rod 1124. The support rod 1127 increases the number of connection points between the first guide rod 1123, the second guide rod 1124, the third guide rod 1125, the fourth guide rod 1126, the first vertical rod 1121 and the second vertical rod 1122 and the frame 111, thereby increasing the connection strength between the first guide rod 1123, the second guide rod 1124, the third guide rod 1125, the fourth guide rod 1126, the first vertical rod 1121 and the second vertical rod 1122 and the frame 111, thereby ensuring the stability and reliability of the limiting bracket assembly 112 for limiting the junction box 12.

[0058] In some embodiments, Figure 2 and Figure 7 As shown, a counterweight 113 is provided on the side of the frame 111 of this embodiment facing away from the seabed II.

[0059] There are multiple counterweight blocks 113, and the multiple counterweight blocks 113 are arranged at intervals.

[0060] It is understandable that the counterweight 113 can increase the weight of the base 11, ensure the stability of the fixed connection between the base 11 and the seabed II, and improve the ability to resist wind or seawater impact.

[0061] In this embodiment, a plurality of counterweight blocks 113 are provided, and the counterweight blocks 113 are spaced apart on the frame 111 , so that the plurality of counterweight blocks can evenly increase the weight of the frame 111 , which is beneficial to the stress stability of the frame 111 and increases the overall weight of the frame 111 .

[0062] Specifically, the counterweight block 113 of this embodiment is provided with two lifting ears 1131, and the two lifting ears 1131 are arranged at an interval. The lifting ears 1131 are used to install the counterweight block 113 on the frame 111, and the counterweight block 113 is lifted by using a lifting equipment and moved to the installation position on the frame 111.

[0063] In some embodiments, Figure 2 As shown, the counterweight block 113 of this embodiment is disposed inside a concrete material or a counterweight material having a density greater than seawater.

[0064] It is understandable that when the counterweight block 113 is provided with concrete material, the concrete material structure is stable and is not easily corroded by seawater, thereby improving the stability of the counterweight block 113 .

[0065] Alternatively, the counterweight block 113 is provided with a counterweight material having a density greater than that of seawater, so that the counterweight block 113 installed near the seabed II can resist the buoyancy of seawater, thereby improving the durability of the base 11 and reducing maintenance costs and environmental impact.

[0066] In some embodiments, Figure 2 As shown, the base 11 of this embodiment further includes a metal plate 114 .

[0067] The metal plate 114 is disposed on a side of the frame 111 away from the seabed II, and the metal plate 114 is used to determine the inclination rate of the base 11 .

[0068] It is understandable that the metal plate 114 has a groove structure. When the frame 111 is installed, the groove structure can accommodate mud and sand in the sea. The seabed II has an angle with the horizontal plane. The outer surface of the sediment in the frame 111 is parallel to the seabed II. Therefore, the inclination of the mud and sand in the metal plate 114 can represent the inclination of the base 11. When installing the base 11, the installer can quickly judge the inclination rate of the base 11 by observing the inclination rate of the mud and sand in the metal plate 114, thereby providing a convenient method for judging the inclination rate of the base 11.

[0069] In some embodiments, Figure 2As shown, a metal plate 115 is provided on the side of the frame 111 of this embodiment close to the seabed II.

[0070] The metal plate 115 is provided with a plurality of drainage holes 1151 , and the drainage holes 1151 are evenly spaced on the metal plate 115 .

[0071] It is understandable that the metal plate 115 is used to be placed in the soil of the seabed II. A plurality of beams are provided on the side of the frame 111 facing the seabed II, and the metal plate 115 is welded to the beams. The metal plate 115 can increase the contact area between the base 11 and the seabed II, so that the base 11 is firmly inserted into the seabed II.

[0072] Furthermore, the metal plate 115 is provided with a plurality of drainage holes 1151 for draining seawater during the installation process, and can also drain excess air, which is more conducive to the installation of the base 11 on the seabed II.

[0073] In some embodiments, Figure 2 and Figure 5 As shown, the base 11 of this embodiment further includes: an inserting plate 116 .

[0074] The plug plate 116 is disposed on a side of the metal plate 115 close to the seabed II. The plug plate 116 is disposed perpendicular to the metal plate 115. The plug plate 116 is used to be plugged into the seabed II.

[0075] It can be understood that the plug plate 116 of the present embodiment is welded to the side of the metal plate 115 close to the seabed II and is arranged perpendicular to the metal plate 115. When the base 11 is installed on the seabed II, the plug plate 116 is inserted into the soil of the seabed II. When the base 11 is subjected to a force in the translation direction of the seabed II, the plug plate 116 provides resistance to suppress the movement of the base 11 relative to the seabed II, thereby ensuring the stability and reliability of the fixation of the base 11 relative to the seabed II.

[0076] In some embodiments, Figure 2 As shown, the frame 111 of this embodiment is provided with mounting ears 117 .

[0077] The mounting lug 117 is arranged vertically with the frame 111 .

[0078] It can be understood that the mounting ear 117 of the present embodiment is arranged on one side of the frame 111 close to the limiting bracket assembly 112 and is perpendicular to the surface of the frame 111. There are multiple mounting ears 117 in the present embodiment, and the multiple mounting ears 117 are evenly spaced around the center of the frame 111. When installing the base 11, the lifting equipment lifts the base 11 through the mounting ears 117, which can ensure that the base 11 is installed in a stable posture.

[0079] In some embodiments, Figure 2As shown, the frame 111 of this embodiment is provided with transport lifting lugs 118 .

[0080] The transport lifting eye 118 is arranged obliquely with respect to the frame 111 .

[0081] It is understandable that the transport ear 118 is arranged on one side of the frame 111 close to the limiting bracket assembly 112, and the transport ear 118 is arranged on the outside of the mounting ear 117, and is inclined to the frame 111, so that the base 11 can be lifted along a long side upward during transportation, so that the outer side of the base 11 faces downward during transportation, which saves transportation space and can also lift multiple bases 11 at the same time, which is beneficial to improving the lifting efficiency of the base 11.

[0082] In a second aspect, in some embodiments, as Figure 2 As shown, this embodiment provides an offshore floating system, including: a dynamic submarine cable 2 and a dynamic submarine cable seabed limiting device 1.

[0083] The joint box 12 connects the dynamic section 22 and the static section 21 of the dynamic submarine cable 2 .

[0084] Specifically, since the offshore floating system includes a dynamic submarine cable seabed limiting device 1, the specific structure of the dynamic submarine cable seabed limiting device 1 refers to the above embodiment, and the offshore floating system shown in this embodiment includes all the technical solutions of the above embodiment, and therefore, at least has all the beneficial effects achieved by all the technical solutions of the above embodiment, which will not be repeated here one by one.

[0085] It is understandable that the offshore floating system can be offshore floating wind power, offshore floating photovoltaic power generation, or offshore wave power generation.

[0086] The offshore floating system includes a dynamic submarine cable 2 and a dynamic submarine cable submarine limiting system. The junction box 12 of the dynamic submarine cable submarine limiting system connects the dynamic section 22 and the static section 21 of the dynamic submarine cable 2. The base 11 of the dynamic submarine cable submarine limiting system is fixedly connected to the seabed II, and the junction box 12 is constrained to the connection end of the junction box 12 and the static section 21, so that when the dynamic submarine cable 2 is installed, when the construction ship 6 pulls the static section 21 with a pulling force, the limiting bracket assembly 112 limits the height direction of the junction box 12 and the direction of the dynamic section 22 toward the static section 21, so that the pulling force of the construction ship 6 cannot affect the dynamic section 22 and cause it to bend repeatedly, thereby delaying the fatigue damage of the dynamic section 22, reducing the construction risk of the dynamic submarine cable 2, and extending the service life of the dynamic submarine cable 2, thereby improving the power generation efficiency of the offshore floating system.

[0087] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dynamic submarine cable bottom limit device, characterized in that: include: Pedestals and splice boxes; One end of the joint box is fixedly connected to the static section of the dynamic submarine cable, and the other end is fixedly connected to the dynamic section of the dynamic submarine cable; The base includes a frame and a limiting bracket assembly; The frame is used to be fixed in the seabed, the limiting bracket assembly is arranged on a side of the frame away from the seabed, the frame has a groove, and the joint box is slidably arranged in the groove; The limiting bracket assembly is used to press the joint box and can abut against the connection end of the joint box and the static section to form a constraint.

2. The dynamic submarine cable seabed limiting device according to claim 1 is characterized in that: The position-limiting bracket assembly includes a first vertical rod and a second vertical rod; The first vertical rod and the second vertical rod are vertically arranged at one end of the groove close to the static section, the first vertical rod and the second vertical rod are spaced apart, and the distance between the first vertical rod and the second vertical rod is smaller than the outer diameter of the joint box and is used for the static section to pass through; And / or, the position-limiting bracket assembly includes a first guide rod and a second guide rod; One end of the first guide rod is connected to the first vertical rod, the other end of the first guide rod is connected to the frame, one end of the second guide rod is connected to the second vertical rod, and the other end of the second guide rod is connected to the frame; Along the axial direction of the connection box extending from the static section toward the dynamic section, the first guide rod and the second guide rod are inclined toward the frame, and the distance between the first guide rod and the second guide rod gradually decreases.

3. The dynamic submarine cable seabed limiting device according to claim 1 or 2, characterized in that: The position limiting bracket assembly also includes a third guide rod and a fourth guide rod; The third guide rod and the fourth guide rod are arranged on the frame, the distance between the third guide rod and the fourth guide rod is smaller than the outer diameter of the joint box, and at least part of the third guide rod and the fourth guide rod are pressed on the joint box.

4. The dynamic submarine cable seabed limiting device according to claim 3 is characterized in that: Along the axial direction of the connection box extending from the dynamic section toward the static section, the third guide rod and the fourth guide rod are inclined toward the frame, and the distance between the third guide rod and the fourth guide rod gradually decreases.

5. The dynamic submarine cable seabed limiting device according to claim 3 is characterized in that: The position-limiting bracket assembly also includes a support rod; There are multiple support rods, one end of each of the support rods is connected to the third guide rod or the fourth guide rod, and the other end of each of the support rods is connected to the frame.

6. The dynamic submarine cable seabed limiting device according to claim 1 is characterized in that: A counterweight is provided on a side of the frame facing away from the seabed; There are a plurality of counterweight blocks, and the plurality of counterweight blocks are arranged at intervals; And / or, the ballast block is provided inside a concrete material or a ballast material having a density greater than seawater; And / or, the base further comprises: a metal plate; The metal plate is arranged on a side of the frame away from the seabed, and the metal plate is used to determine the inclination rate of the base.

7. The dynamic submarine cable seabed limiting device according to claim 1, characterized in that: A metal plate is provided on one side of the frame close to the seabed; The metal plate is provided with a plurality of drainage holes, and the drainage holes are evenly spaced and arranged on the metal plate.

8. The dynamic submarine cable seabed limiting device according to claim 7 is characterized in that: The base also includes: an insert plate; The plug plate is arranged on a side of the metal plate close to the seabed, the plug plate is arranged vertically to the metal plate, and the plug plate is used to be plugged into the seabed.

9. The dynamic submarine cable seabed limiting device according to claim 1, characterized in that: The frame is provided with mounting lugs; The mounting lug is arranged vertically with respect to the frame; And / or, the frame is provided with transport lifting lugs; The transport lifting lug is arranged obliquely to the frame.

10. An offshore floating system, characterized in that: include: A dynamic submarine cable and a submarine limiting device for a dynamic submarine cable as claimed in any one of claims 1 to 9; The joint box connects the dynamic section and the static section of the dynamic submarine cable.

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