Fractal anchoring device for submarine cable landing section

Abstract

The invention provides a fractal anchoring device for a submarine cable landing section. The fractal anchoring device comprises at least one pair of supporting bodies which are symmetrically arranged along the radial direction of a submarine cable; a clamping cavity is defined by the supporting bodies together and used for clamping the submarine cable from the two opposite sides. Each supporting body comprises a base plate, a first arc-shaped groove is formed in each base plate, and a first clamping piece is rotatably connected into each first arc-shaped groove; a second arc-shaped groove is formed in the first clamping piece, and a second clamping piece is rotatably connected into the second arc-shaped groove; and the first clamping piece and / or the second clamping piece are / is provided with a contact surface in contact with the outer surface of the submarine cable, and are / is used for rotating along with the outer surface of the submarine cable in the clamping process so as to realize dynamic fitting with the outer surface of the submarine cable. A two-stage fractal clamping structure is formed through the first clamping piece and the second clamping piece and can adaptively rotate along with the outline of the outer surface of the submarine cable, the effective contact area with the submarine cable is increased, the clamping stability is improved, and sliding of the submarine cable is restrained.

Description

Technical Field

[0001] This invention relates to the field of submarine cable anchoring equipment technology, and more specifically, to a fractal anchoring device for the landing section of a submarine cable. Background Technology

[0002] With the continuous development and construction of offshore wind power, submarine cables, as an important channel for transmitting information and electricity, are playing an increasingly important role in offshore wind power transmission projects. As the transmission capacity of offshore wind power increases, the size and weight of submarine cables are also increasing. After landing, due to their large size and weight, reliable fixing measures are needed to ensure the safety of the power system. These measures involve securing the submarine cables to onshore cable trenches or other pathways to prevent them from slipping due to external influences such as ocean tides.

[0003] In existing submarine cable landing section fixing technologies, conventional submarine cable landing anchoring devices are not secure and are prone to loosening, causing submarine cables to move and causing accidents, reducing the service life of submarine cables, affecting power grid safety, and causing huge economic losses to offshore wind power. Summary of the Invention

[0004] In view of this, the present invention proposes a fractal anchoring device for the landing section of submarine cables, which aims to solve the problem that existing submarine cable landing anchoring devices are prone to loosening and slippage under the action of ocean movement and gravity due to their small contact area with the cable and poor adaptability. This invention proposes a fractal anchoring device for the landing section of a submarine cable, comprising: at least one pair of supports arranged radially symmetrically along the submarine cable; All the aforementioned supports together form a clamping cavity for clamping the submarine cable from opposite sides; Each of the supports includes a base plate, on which a first arc-shaped groove is provided, and a first clamping member is rotatably connected; the first clamping member is provided with a second arc-shaped groove, and a second clamping member is rotatably connected in the second arc-shaped groove; The first clamping member and / or the second clamping member have a contact surface that contacts the outer surface of the submarine cable, and are used to follow the rotation of the outer surface of the submarine cable during the clamping process to achieve dynamic contact with the outer surface of the submarine cable.

[0005] Furthermore, in the fractal anchoring device for the landing section of the submarine cable mentioned above, the first arc-shaped groove is a semi-circular groove, and a first connecting part is provided in the middle of one end near the clamping cavity, and a connecting hole is provided on it for the first clamping member to be rotatably connected to the first connecting part.

[0006] Furthermore, in the fractal anchoring device for the landing section of the submarine cable described above, a second connecting part corresponding to the first connecting part is provided at the middle of one end of the first clamping member near the clamping cavity, for rotatably connecting with the substrate. The first clamping member is provided with a plurality of second arc-shaped grooves arranged at intervals. Each second arc-shaped groove has a third connecting part at the middle of one end near the clamping cavity. The third connecting part has a connecting hole for rotatably connecting the second clamping member to the third connecting part via a rotating shaft.

[0007] Furthermore, in the fractal anchoring device for the landing section of the submarine cable mentioned above, both the first clamping member and the second clamping member are semi-circular structures, the radius of the first clamping member is R1, the radius of the second clamping member is R2, and R2≤0.45R1 is satisfied.

[0008] Furthermore, in the fractal anchoring device for the landing section of the submarine cable mentioned above, a fourth connecting part corresponding to the third connecting part is provided at the middle of one end of the second clamping member near the clamping cavity, for rotatably connecting with the first clamping member; The second clamping member is provided with a plurality of spaced third arc-shaped grooves, and a third clamping member is rotatably connected in each of the third arc-shaped grooves; Each of the third arc-shaped grooves has a fifth connecting part at the middle of one end near the clamping cavity. The fifth connecting part has a connecting hole for the third clamping member to be rotatably connected to the fifth connecting part via a rotating shaft.

[0009] Furthermore, in the fractal anchoring device for the landing section of the submarine cable mentioned above, the third clamping member has an arc-shaped structure with a central angle greater than 180°.

[0010] Furthermore, in the fractal anchoring device for the landing section of the submarine cable mentioned above, the third clamping member is a semi-circular structure with a radius of R3, and the radius of the second clamping member is R2, and R3≤0.45R2.

[0011] Furthermore, in the fractal anchoring device for the landing section of the submarine cable described above, the contact surface between the third clamping member and the outer surface of the submarine cable is an arc-shaped surface.

[0012] Furthermore, in the fractal anchoring device for the landing section of the submarine cable mentioned above, the support body is a pair, symmetrically arranged in the vertical direction, used to clamp the submarine cable from the upper and lower sides.

[0013] Furthermore, in the fractal anchoring device for the landing section of the submarine cable mentioned above, the support body is in two pairs, symmetrically arranged along the vertical and horizontal directions respectively, forming a clamping structure in four directions: up, down, left, and right. Each support body is distributed at 90° intervals along the circumference of the submarine cable.

[0014] The fractal anchoring device for submarine cable landing sections provided by the present invention forms a two-stage fractal clamping structure by setting a rotatable first clamping member on a symmetrical support body and further embedding a rotatable second clamping member thereon. This structure can adaptively rotate following the contour of the outer surface of the submarine cable, increasing the effective contact area with the submarine cable, thereby improving clamping stability and suppressing submarine cable slippage caused by ocean movement and gravity. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of the fractal anchoring device for the landing section of a submarine cable provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the base plate of the support body in the fractal anchoring device for submarine cable landing section provided in an embodiment of the present invention; Figure 3 A schematic diagram of the structure of the first clamping member in the fractal anchoring device for submarine cable landing section provided in an embodiment of the present invention; Figure 4 A schematic diagram of the structure of the second clamping member in the fractal anchoring device for the landing section of a submarine cable provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the third clamping member in the fractal anchoring device for the landing section of a submarine cable provided in an embodiment of the present invention. Detailed Implementation

[0016] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] See Figures 1-4The fractal anchoring device for the landing section of a submarine cable according to an embodiment of the present invention includes: at least one pair of support bodies 1 arranged radially symmetrically along the submarine cable 2; each of the support bodies 1 together forms a clamping cavity 10 for clamping the submarine cable 2 from opposite sides; each of the support bodies 1 includes a base plate 11, the base plate 11 is provided with a first arc-shaped groove 13, and a first clamping member 3 is rotatably connected therein; the first clamping member 3 is provided with a second arc-shaped groove 31, and a second clamping member 4 is rotatably connected therein; the first clamping member 3 and / or the second clamping member 4 have a contact surface that contacts the outer surface of the submarine cable 2, and are used to follow the rotation of the outer surface of the submarine cable 2 during the clamping process to achieve dynamic contact with the outer surface of the submarine cable 2.

[0018] Specifically, the base plate 11 of the support body 1 can be arc-shaped, such as semi-circular, and has a first arc-shaped groove 13 recessed therein. The first arc-shaped groove 13 can be semi-circular with a radius of R1. A first connecting part 14 is provided in the middle of one end near the clamping cavity 10, and a connecting hole is provided thereon for the first clamping member 3 to be rotatably connected to the first connecting part 14.

[0019] Both the first clamping member 3 and the second clamping member 4 can be semi-circular structures. The radius of the first clamping member 3 is R1, and the radius of the second clamping member 4 is R2, satisfying R2≤0.45R1. When the submarine cable 2 deflects partially due to wave swaying, the first clamping member 3 and the second clamping member 4 rotate freely within their respective arc-shaped grooves, and the contact surfaces automatically face the outer surface of the submarine cable 2, maintaining surface contact at all times, effectively preventing slippage caused by poor contact.

[0020] More specifically, the first clamping member 3 has a second connecting part 32 corresponding to the first connecting part 14 at the middle of one end near the clamping cavity 10, for rotatably connecting with the substrate 11; the first clamping member 3 has a plurality of spaced second arc-shaped grooves 31, and each second arc-shaped groove 31 has a third connecting part 33 at the middle of one end near the clamping cavity 10, and the third connecting part 33 has a connecting hole for rotatably connecting the second clamping member 4 to the third connecting part 33 via a rotating shaft.

[0021] Specifically, the second arc-shaped groove 31 is arc-shaped with a central angle of 180°, an approximately U-shaped cross-section, a smooth inner wall, and a radius of curvature R2, matching the radius of the second clamping member 4. Notches are provided on both side walls of each second arc-shaped groove 31 to reduce structural weight. Gaps are provided between the multiple second arc-shaped grooves 31 to prevent interference between their corresponding second clamping members 4 during rotation. All second arc-shaped grooves 31 have the same radius.

[0022] In this embodiment, there are two second arc-shaped grooves 31, or three or more second arc-shaped grooves 31 can be provided at intervals to accommodate submarine cables 2 with different cross sections and enhance clamping stability.

[0023] In this embodiment, the first connecting part 14, the second connecting part 32 and the third connecting part 33 can all be protrusion structures. The protrusion structure extends from the center of the corresponding arc groove to the clamping cavity 10. The protrusion can be an inverted trapezoidal structure.

[0024] The first connecting part 14, the second connecting part 32 and the third connecting part 33 are all provided with connecting holes to install the rotating shaft and realize the independent rotation of the first clamping member 3 and the second clamping member 4.

[0025] In this embodiment, each of the support bodies 1 further includes an anchoring connection plate 12; wherein the anchoring connection plate 12 is disposed at one end of the base plate 11 away from the submarine cable 2, and is used to connect to the land foundation.

[0026] Specifically, the anchoring connection plate 12 can be a square or strip plate, which is connected to the land foundation by bolts or welding.

[0027] In one specific embodiment of this invention, the support bodies 1 are a pair, symmetrically arranged in the vertical direction, used to clamp the submarine cable 2 from the top and bottom. This allows the first clamping member 3 and the second clamping member 4 to rotate independently, adaptively conforming to the outer surface of the submarine cable 2. The two support bodies 1 are respectively positioned above and below the submarine cable 2, forming clamping cavities 10 from both sides. The structure is compact and facilitates on-site installation and alignment. Each support body 1 is detachable, making the structure more flexible.

[0028] It is evident from the above that the fractal anchoring device for the submarine cable landing section provided in this embodiment, by setting a rotatable first clamping member 3 on a symmetrical support body 1 and further embedding a rotatable second clamping member 4 thereon, forms a two-stage fractal clamping structure. This structure can adaptively rotate following the contour of the outer surface of the submarine cable 2, increasing the effective contact area with the submarine cable 2, thereby improving clamping stability and suppressing the slippage of the submarine cable 2 caused by ocean movement and gravity.

[0029] Combination Figure 4 and Figure 5In the above embodiment, a fourth connecting portion 43 corresponding to the third connecting portion 33 is provided at the middle of one end of the second clamping member 4 near the clamping cavity, for rotatably connecting with the first clamping member 3; the second clamping member 4 is provided with a plurality of spaced third arc-shaped grooves 41, and a third clamping member 5 is rotatably connected in each third arc-shaped groove 41; a fifth connecting portion 42 is provided at the middle of one end of each third arc-shaped groove 41 near the clamping cavity 10, and a connecting hole is provided on the fifth connecting portion 42 for rotatably connecting the third clamping member 5 to the fifth connecting portion 42 via a rotating shaft. The radii of each third arc-shaped groove 41 are equal.

[0030] In one specific embodiment of this example, the third clamping member is a semi-circular structure with a radius of R3, and the second clamping member has a radius of R2, satisfying R3≤0.45R2.

[0031] In another specific embodiment of this example, the third clamping member 5 is an arc-shaped structure with a central angle greater than 180°. That is, the third clamping member 5 is an arc-shaped structure formed by an arc with a central angle greater than 180° and its chord, for example, its central angle can be 185~270°. The radius of the arc is R3, and satisfies R3≤0.45R2, where R2 is the radius of the second clamping member.

[0032] The radius of the arc of the third clamping member 5 is R3; the radius of the second clamping member 4 is R2, and R3 ≤ 0.45R2. The end of the third clamping member 5 near the contact surface is provided with a connecting hole so as to cooperate with the connecting hole on the fifth connecting part 42 to realize the installation of the rotating shaft.

[0033] The third arc-shaped groove 41 is an arc-shaped groove with a U-shaped cross-section. Its inner wall is smooth, and its radius of curvature is R3, which matches the arc radius of the third clamping member 5. Notches are provided on both sides of the third arc-shaped groove 41 to reduce structural weight. A connecting hole is provided at the end of the third arc-shaped groove 41 near the clamping cavity 10 for mounting a rotating shaft, allowing the third clamping member 5 to rotate relative to the second clamping member 4 around this shaft. The depth and width of this groove are both greater than the maximum thickness of the third clamping member 5 to ensure that it does not jam during rotation.

[0034] Preferably, the contact surface between the third clamping member 5 and the outer surface of the submarine cable 2 is an arc-shaped surface, which increases the contact area between the third clamping member 5 and the submarine cable 2, and is beneficial to the flow of the metal armor and anchoring device of the submarine cable 2.

[0035] In this embodiment, the number of second clamping members 4 can be twice the number of first clamping members 3, and the number of third clamping members 5 can be twice the number of second clamping members 4. The number of first clamping members 3 is 2, and two clamping members 3 are symmetrically arranged about the outer surface of the submarine cable 2. The number of second clamping members 4 is 4, and they are symmetrically arranged in pairs. The number of third clamping members 5 is 8, and they are arranged in groups of four about the outer surface of the submarine cable 2.

[0036] In this embodiment, the contour edges of the first clamping member 3, the second clamping member 4, and the third clamping member 5 that contact the submarine cable are all rounded, which improves the stability of the anchoring device under ocean movement and gravity, and avoids damage to the submarine cable and steel wire. The support body 1, the first clamping member 3, the second clamping member 4, and the third clamping member 5 can be made of corrosion-resistant materials such as super austenitic stainless steel to improve corrosion resistance.

[0037] In the above embodiments, there are two pairs of support bodies 1, symmetrically arranged along the vertical and horizontal directions respectively, forming a clamping structure in four directions: up, down, left, and right. Each support body 1 is distributed at 90° intervals along the circumference of the submarine cable 2. Correspondingly, the first clamping member 3, the second clamping member 4, and the third clamping member 5 in the four directions can rotate independently to adaptively conform to the outer surface of the submarine cable 2, effectively increasing the contact area between the third clamping member 5 and the submarine cable 2, thereby improving the contact performance between the metal armor of the submarine cable 2 and the anchoring device, which is beneficial for current flow.

[0038] In summary, the fractal anchoring device for submarine cable landing sections provided by this invention forms a three-level fractal clamping structure by setting a rotatable first clamping member on a symmetrical support body, embedding a rotatable second clamping member on it, and further embedding a third clamping member on the second clamping member. Compared with existing anchoring devices that use semi-circular clamping plates, each level of clamping member can rotate independently through arc grooves and rotating shafts, which can respond to changes in the outer surface of the submarine cable step by step, achieve multi-scale dynamic fit, significantly increase the effective contact area with the submarine cable, and disperse contact stress. This three-level fractal mechanical structure, with its self-adaptability, not only improves the tensile strength and clamping stability of the anchoring device, but also effectively suppresses the slippage of the submarine cable under the action of ocean movement and gravity. At the same time, the overall structure is flexible and made of corrosion-resistant materials, which can effectively extend the service life of the anchoring device, thereby greatly improving the reliability of the submarine cable landing section anchoring.

[0039] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A fractal anchoring device for a submarine cable landing section, characterized in that, include: At least one pair of radially symmetrical supports for the coastal undersea cable; All the aforementioned supports together form a clamping cavity for clamping the submarine cable from opposite sides; Each of the supports includes a base plate, on which a first arc-shaped groove is provided, and a first clamping member is rotatably connected; the first clamping member is provided with a second arc-shaped groove, and a second clamping member is rotatably connected in the second arc-shaped groove; The first clamping member and / or the second clamping member have a contact surface that contacts the outer surface of the submarine cable, and are used to follow the rotation of the outer surface of the submarine cable during the clamping process to achieve dynamic contact with the outer surface of the submarine cable.

2. The fractal anchoring device for submarine cable landing sections according to claim 1, characterized in that, The first arc-shaped groove is a semi-circular groove, and a first connecting part is provided in the middle of one end near the clamping cavity. A connecting hole is provided on the connecting part for the first clamping member to be rotatably connected to the first connecting part.

3. The fractal anchoring device for submarine cable landing sections according to claim 2, characterized in that, The first clamping member has a second connecting part corresponding to the first connecting part at the middle of one end near the clamping cavity, which is used to rotatably connect with the substrate. The first clamping member is provided with a plurality of second arc-shaped grooves arranged at intervals. Each second arc-shaped groove has a third connecting part at the middle of one end near the clamping cavity. The third connecting part has a connecting hole for rotatably connecting the second clamping member to the third connecting part via a rotating shaft.

4. The fractal anchoring device for submarine cable landing sections according to claim 2, characterized in that, Both the first clamping member and the second clamping member are semi-circular structures. The radius of the first clamping member is R1, and the radius of the second clamping member is R2, and R2 ≤ 0.45 R1.

5. The fractal anchoring device for submarine cable landing sections according to claim 1, characterized in that, The second clamping member has a fourth connecting part corresponding to the third connecting part at the middle of one end near the clamping cavity, which is used to rotatably connect with the first clamping member; The second clamping member is provided with a plurality of spaced third arc-shaped grooves, and a third clamping member is rotatably connected in each of the third arc-shaped grooves; Each of the third arc-shaped grooves has a fifth connecting part at the middle of one end near the clamping cavity. The fifth connecting part has a connecting hole for the third clamping member to be rotatably connected to the fifth connecting part via a rotating shaft.

6. The fractal anchoring device for submarine cable landing sections according to claim 5, characterized in that, The third clamping element has an arc-shaped structure with a central angle greater than 180°.

7. The fractal anchoring device for submarine cable landing sections according to claim 5, characterized in that, The third clamping member has a semi-circular structure with a radius of R3, and the second clamping member has a radius of R2, satisfying R3≤0.45R2.

8. The fractal anchoring device for submarine cable landing sections according to claim 5, characterized in that, The contact surface between the third clamping member and the outer surface of the submarine cable is an arc-shaped surface.

9. The fractal anchoring device for submarine cable landing sections according to claim 1, characterized in that, The support consists of a pair, symmetrically arranged in the vertical direction, used to clamp the submarine cable from the top and bottom.

10. The fractal anchoring device for submarine cable landing sections according to claim 1, characterized in that, The support body consists of two pairs, which are symmetrically arranged along the vertical and horizontal directions to form a clamping structure in four directions: up, down, left, and right. Each support body is distributed at 90° intervals along the circumference of the submarine cable.

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