Submarine cable with large cross section and high buffering performance

Abstract

The invention provides a large-section high-buffering submarine cable. The large-section high-buffering submarine cable comprises an inner sheath, a conductive assembly, a buffering assembly and an outer sheath assembly, an accommodating cavity is formed in the inner sheath; the conductive assembly is located in the accommodating cavity and comprises at least one first conductive layer and at least one second conductive layer which are alternately arranged; the first conductive layer comprises a plurality of first conductive parts, and the second conductive layer comprises a plurality of second conductive parts; the buffer assembly and the outer protection assembly are arranged around the outer peripheral surface of the inner sheath in sequence; any second conductive piece is at least partially located between the two adjacent first conductive pieces of the adjacent first conductive layer, the second conductive piece abuts against the two adjacent first conductive pieces, and a plurality of first elastic protruding parts are arranged on the inner circumferential face of the inner sheath in a protruding mode. Any first elastic convex part is at least partially located between the two adjacent first conductive pieces of the adjacent first conductive layer, and the first elastic convex part abuts against the two adjacent first conductive pieces and is used for abutting against the two adjacent first conductive pieces to deflect relative to the second conductive piece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of submarine cables, and in particular to a submarine cable with large cross-section and high buffering performance. BACKGROUND

[0002] The submarine environment is complex and changeable, and the submarine cable laid in it for a long time is subject to external damage such as rock friction and ocean current impact, which affects the service life of the submarine cable. SUMMARY

[0003] The present application provides a submarine cable with large cross-section and high buffering performance to solve the problem that the submarine cable in the known technology is easily damaged by external forces such as rock friction and ocean current impact, thereby affecting its service life.

[0004] The present application provides a submarine cable with large cross-section and high buffering performance, comprising an inner sheath, a conductive assembly, a buffering assembly, and an outer sheath assembly. The inner sheath is provided with a receiving cavity. The conductive assembly is located in the receiving cavity, and the conductive assembly comprises at least one first conductive layer and at least one second conductive layer. The at least one first conductive layer and the at least one second conductive layer are arranged around the inner wall of the inner sheath, and the at least one first conductive layer and the at least one second conductive layer are arranged alternately. The first conductive layer comprises a plurality of first conductive pieces, and the second conductive layer comprises a plurality of second conductive pieces. The buffering assembly is arranged around the outer circumferential surface of the inner sheath. The outer sheath assembly is arranged around the outer circumferential surface of the buffering assembly. Wherein, any one of the second conductive pieces is at least partially located between the adjacent two first conductive pieces of the adjacent first conductive layer, and the second conductive piece abuts the adjacent two first conductive pieces. The inner circumferential surface of the inner sheath is provided with a plurality of first elastic protrusions. Any one of the first elastic protrusions is at least partially located between the adjacent two first conductive pieces of the adjacent first conductive layer, and the first elastic protrusion abuts the adjacent two first conductive pieces, for abutting the adjacent two first conductive pieces against the deflection of the second conductive piece.

[0005] In a possible implementation, the cross-sectional shape of the first conductive piece is elliptical, and the cross-sectional shape of the second conductive piece is circular.

[0006] In a possible implementation, a first gap and a second gap are provided between the adjacent two first conductive pieces in the same layer, and the first gap is located on the side of the second gap close to the inner sheath; The first gap is configured to accommodate part of the first elastic protrusion or the second conductive piece, and the area of the first elastic protrusion and the second conductive piece located in the first gap abuts the two first conductive pieces forming the first gap; The second gap is configured to accommodate part of the second conductive member, and a section of the second conductive member located in the second gap abuts against two first conductive members forming the second gap.

[0007] In a possible implementation, the number of the first elastic protrusions is the same as the number of the second conductive members of the second conductive layer closest to the first elastic protrusions, and the first elastic protrusions and the second conductive members are one-to-one corresponding. The first elastic protrusion and the corresponding second conductive member are respectively accommodated in the first gap and the second gap formed between the same set of two adjacent first conductive members.

[0008] In a possible implementation, the conductive assembly further comprises a central member, and a plurality of second elastic protrusions are protruded from the outer circumferential surface of the central member and are sequentially and spaced apart around the outer circumferential surface of the central member. The outer circumferential surface of the central member is surrounded by the second conductive layer, and any one of the second elastic protrusions is at least partially located between two adjacent second conductive members and abuts against the two adjacent second conductive members.

[0009] In a possible implementation, the second conductive member is accommodated in the second gap near one end of the inner sheath, and the second conductive member is accommodated in the first gap or the space between two adjacent second elastic protrusions away from the other end of the inner sheath.

[0010] In a possible implementation, the buffer assembly comprises a first buffer layer and a second buffer layer, the first buffer layer is arranged around the outer circumferential surface of the inner sheath, and the second buffer layer is arranged around the outer circumferential surface of the first buffer layer.

[0011] In a possible implementation, the first buffer layer comprises a plurality of first buffer members and a plurality of second buffer members, and the first buffer members and the second buffer members are alternately arranged along the circumference of the inner sheath. The inner sheath comprises a plurality of first sections and a plurality of second sections, and the first sections and the second sections are alternately arranged along the circumference of the first buffer layer. The inner wall of any one of the first sections is provided with the first elastic protrusion. The first buffer member is provided in a solid structure, and the first buffer member is attached to the outer circumferential surface of the first section. The second buffer member is provided in a hollow structure, and the second buffer member is attached to the outer circumferential surface of the second section.

[0012] In a possible implementation, the second buffer layer comprises a plurality of third buffer members, and the third buffer members are arranged around the outer circumferential surface of the first buffer layer.

[0013] In a possible implementation, the large-section high-buffering submarine cable further comprises an optical unit, two of the third buffering members in the second buffering layer are spaced apart and form an accommodation space, the optical unit is located in the accommodation space, and the optical unit is clamped between the second buffering member and the outer protection assembly.

[0014] The large-section high-buffering submarine cable provided by the application can improve the buffering performance of the submarine cable and reduce the influence of external forces such as ocean current impact on the submarine cable by arranging the buffering assembly between the outer protection assembly and the inner sheath. In addition, the conductive assembly adopts the structure in which the first conductive layer and the second conductive layer are alternately arranged, the first conductive layer is composed of a plurality of first conductive members, and the second conductive layer is composed of a plurality of second conductive members, so that the conductive performance of the submarine cable can be improved. At the same time, when the submarine cable is impacted by external forces, the buffering assembly and the first elastic protrusion buffer the external forces, and the first elastic protrusion abuts against two adjacent first conductive members, so that the two first conductive members are deflected relative to the second conductive member abutting against them, thereby buffering the impact force received by the first conductive member and avoiding damage to the first conductive member. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 FIG. 1 is a structural schematic diagram of a large-section high-buffering submarine cable according to an embodiment of the application.

[0016] Fig. 2 FIG. 2 is a structural schematic diagram of a large-section high-buffering submarine cable according to another embodiment of the application.

[0017] Main element symbol explanation: 100, large-section high-buffering submarine cable; 10, conductive assembly; 11, first conductive layer; 110, first conductive member; 111, first outer conductive layer; 112, first inner conductive layer; 12, second conductive layer; 120, second conductive member; 121, second outer conductive layer; 122, second inner conductive layer; 13, center member; 130, second elastic protrusion; 14, first gap; 15, second gap; 20, inner sheath; 21, accommodation cavity; 22, first elastic protrusion; 23, first zone; 24, second zone; 30, buffering assembly; 31, first buffering layer; 311, first buffering member; 312, second buffering member; 32, second buffering layer; 321, third buffering member; 322, accommodation space; 40, outer protection assembly; 50, optical unit.

[0018] The following specific implementation will further illustrate the application in combination with the above drawings. Specific implementation

[0019] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Illustrated in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make this application thorough and complete and to fully convey the scope of this application to those skilled in the art. The same reference numerals represent the same or similar components.

[0020] The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. In addition, when used herein, "includes" and / or "comprising" and / or "having" integers, steps, operations, components and / or components do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0021] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the context of this application, and will not be interpreted as idealized or overly formal meanings.

[0022] The specific implementation methods of the present application will be described in further detail below with reference to the accompanying drawings.

[0023] like Figs. 1-2 As shown, this embodiment provides a large-cross-section and high-buffer submarine cable 100 , including an inner sheath 20 , a conductive component 10 , a buffer component 30 , and an outer sheath component 40 .

[0024] The inner sheath 20 is made of an insulating and elastic material, such as plastic. It is generally a hollow cylindrical structure and defines a receiving cavity 21. The conductive assembly 10 is located within the receiving cavity 21 and includes at least one first conductive layer 11 and at least one second conductive layer 12. These layers are arranged around the inner wall of the inner sheath 20, alternating with each other in the radial direction of the cable.

[0025] The first conductive layer 11 includes a plurality of first conductive elements 110 , and the second conductive layer 12 includes a plurality of second conductive elements 120 . The buffer assembly 30 is disposed around the outer circumference of the inner sheath 20 , and the outer sheath assembly 40 is disposed around the outer circumference of the buffer assembly 30 .

[0026] The second conductive member 120 is at least partially located between the two adjacent first conductive members 110 of the adjacent first conductive layer 11, and the second conductive member 120 abuts the two adjacent first conductive members 110. The inner circumferential surface of the inner sheath 20 is provided with a plurality of first elastic protrusions 22. Any one of the first elastic protrusions 22 is at least partially located between the two adjacent first conductive members 110 of the adjacent first conductive layer 11, and the first elastic protrusion 22 abuts the two adjacent first conductive members 110, so as to abut the two adjacent first conductive members 110 to deflect relative to the second conductive member 120.

[0027] Thus, the submarine cable 100 with large cross-section and high cushioning performance provided by the present application can improve the cushioning performance of the submarine cable and reduce the impact of external forces such as ocean current impact on the submarine cable by arranging the buffer assembly 30 between the outer sheath assembly 40 and the inner sheath 20. In addition, the conductive assembly 10 adopts the structure in which the first conductive layer 11 and the second conductive layer 12 are arranged alternately, and the first conductive layer 11 is composed of a plurality of first conductive members 110, and the second conductive layer 12 is composed of a plurality of second conductive members 120, so as to improve the conductive performance of the submarine cable. At the same time, when the submarine cable is impacted by external forces, the external forces are buffered by the buffer assembly 30 and the first elastic protrusion 22, and the first elastic protrusion 22 abuts the two adjacent first conductive members 110, so that the two first conductive members 110 deflect relative to the second conductive member 120 abutting the two first conductive members 110, thereby buffering the impact force received by the first conductive member 110 and avoiding damage to the first conductive member 110.

[0028] Please combine Figs. 1-2 In an embodiment, the inner sheath 20 includes a plurality of first regions 23 and a plurality of second regions 24. Along the circumference of the first buffer layer 31, the plurality of first regions 23 and the plurality of second regions 24 are arranged alternately, and the inner wall of any one of the first regions 23 is provided with a first elastic protrusion 22. The first elastic protrusion 22 protrudes inward from the inner wall of the first region 23, and the cross-sectional shape of the first elastic protrusion 22 is substantially fan-shaped.

[0029] The two ends of any one of the first regions 23 are respectively connected to two different second regions 24, and the plurality of first regions 23, the plurality of second regions 24, and the plurality of first elastic protrusions 22 are integrally formed.

[0030] The first conductive members 110 are arranged in sequence around the central axis of the submarine cable, and any two adjacent first conductive members 110 abut each other to ensure that the first conductive layer 11 formed by the plurality of first conductive members 110 has a compact structure. The two ends of the first conductive member 110 correspond to the two first elastic protrusions 22, respectively, so that the two elastic protrusions abut the two ends of the first conductive member 110, respectively, and the portion of the first conductive member 110 between the two ends abuts the second portion 24. The second conductive members 120 are arranged in sequence around the central axis of the submarine cable, and any two adjacent second conductive members 120 abut each other to ensure that the second conductive layer 12 formed by the plurality of second conductive members 120 has a compact structure.

[0031] The first conductive member 110 and the second conductive member 120 are both conductive materials, such as aluminum or the like. The cross-sectional shape of the first conductive member 110 is elliptical, and the cross-sectional shape of the second conductive member 120 is circular. The elliptical first conductive member 110 and the circular second conductive member 120 are arranged in layers and staggered. Compared with the structure in which both the first conductive member 110 and the second conductive member 120 have a circular cross-section, the present application can increase the cross-sectional area of the entire conductive assembly 10. The ends of the two adjacent first conductive members 110 in the same layer abut each other, and the ends of the two first conductive members 110 abutting each other form a first gap 14 and a second gap 15. The first gap 14 is located on the side of the second gap 15 close to the inner sheath 20.

[0032] The first gap 14 is configured to accommodate part of the first elastic protrusion 22 or the second conductive member 120. The portions of the first elastic protrusion 22 and the second conductive member 120 located in the first gap 14 abut the two first conductive members 110 forming the first gap 14. The second gap 15 is configured to accommodate part of the second conductive member 120. The portions of the second conductive member 120 located in the second gap 15 abut the two first conductive members 110 forming the second gap 15.

[0033] In the present embodiment, the number of the first conductive layer 11 is two, including a first outer conductive layer 111 and a first inner conductive layer 112. The number of the second conductive layer 12 is also two, including a second outer conductive layer 121 and a second inner conductive layer 122.

[0034] The first outer conductive layer 111 and the first inner conductive layer 112 each include a plurality of first conductive members 110 arranged in a ring. The second outer conductive layer 121 and the second inner conductive layer 122 each include a plurality of second conductive members 120 arranged in a ring. The first outer conductive layer 111 is arranged around the inner circumferential surface of the inner sheath 20, the second outer conductive layer 121 is arranged around the inner circumferential surface of the first outer conductive layer 111, the first inner conductive layer 112 is arranged around the inner circumferential surface of the second outer conductive layer 121, and the second inner conductive layer 122 is arranged around the inner circumferential surface of the first inner conductive layer 112.

[0035] The first elastic protrusions 22 and the second conductive members 120 of the second outer conductive layer 121 are in one-to-one correspondence. The first elastic protrusions 22 and the corresponding second conductive members 120 are respectively partially accommodated in the first gap 14 and the second gap 15 formed between the same set of two adjacent first conductive members 110.

[0036] Thus, for the first outer conductive layer 111, the side portion of any one of the first conductive members 110 close to the inner sheath 20 is clamped between two adjacent first elastic protrusions 22, the side portion of any one of the first conductive members 110 away from the inner sheath 20 is clamped between two adjacent second conductive members 120 of the second outer conductive layer 121, and based on the abutting of each first conductive member 110 to each other, the circumferential limiting of each first conductive member 110 in the first outer conductive layer 111 is realized, and the compactness of the structure of the first outer conductive layer 111 as the outermost layer of the entire conductive assembly 10 is ensured.

[0037] Further, the conductive assembly 10 further comprises a center member 13, and the outer circumferential surface of the center member 13 is provided with a plurality of second elastic protrusions 130, which are sequentially and spaced apart around the outer circumferential surface of the center member 13. The outer circumferential surface of the center member 13 is provided with a second conductive layer 12, and any one of the second elastic protrusions 130 is at least partially located between two adjacent second conductive members 120 and abuts the two adjacent second conductive members 120.

[0038] In the embodiment, the center piece 13 is in a cylindrical structure, and the center piece 13 is coaxially arranged with the submarine cable, and the center piece 13 is made of insulating plastic material. The second inner conductive layer 122 is arranged around the outer circumferential surface of the center piece 13 to support the second inner conductive layer 122 through the center piece 13. The second elastic protrusion 130 can be elastically deformed, and the second elastic protrusion 130 is integrally formed with the center piece 13. The second elastic protrusion 130 protrudes outward from the outer circumferential surface of the center piece 13, and the cross-sectional shape of the second elastic protrusion 130 is substantially fan-shaped. Any one of the second elastic protrusions 130 is accommodated in the gap between the two adjacent second conductive pieces 120, and the portion of any one of the second conductive pieces 120 close to one side of the center piece 13 is clamped between the two adjacent second elastic protrusions 130, and the second conductive pieces 120 are abutted with each other, thereby achieving the circumferential limiting of the second conductive pieces 120 in the second inner conductive layer 122, thereby ensuring the compactness of the structure of the second inner conductive layer 122 as the innermost layer of the entire conductive assembly 10, thereby ensuring that the entire conductive assembly 10 will not be loose by ensuring the compactness of the structure of the outermost layer and the innermost layer of the entire conductive assembly 10. At the same time, the first conductive pieces 110 and the second conductive pieces 120 between the first outer conductive layer 111 and the second inner conductive layer 122 are not limited by the elastic protrusions, and the first conductive pieces 110 and the second conductive pieces 120 between the first outer conductive layer 111 and the second inner conductive layer 122 have a certain space to be able to deflect to a certain extent, thereby increasing the buffering capacity of the conductive assembly 10 by the small-range deflection of the first conductive pieces 110 and the second conductive pieces 120 under stress while ensuring that the entire conductive assembly 10 will not be loose.

[0039] Further, one end of the second conductive piece 120 close to the inner sheath 20 is accommodated in the second gap 15, and the other end of the second conductive piece 120 away from the inner sheath 20 is accommodated in the first gap 14 or the space between the two adjacent second elastic protrusions 130.

[0040] In the embodiment, for the second outer conductive layer 121, the portion of any one of the second conductive pieces 120 close to one side of the inner sheath 20 is accommodated in the second gap 15 formed by the two first conductive pieces 110 in the first outer conductive layer 111, and the portion of any one of the second conductive pieces 120 away from one side of the inner sheath 20 is accommodated in the first gap 14 formed by the two first conductive pieces 110 in the first inner conductive layer 112, thereby achieving the limiting of any one of the second conductive pieces 120 by the abutment of the four first conductive pieces 110, and the tangential contact between the second conductive piece 120 and the four first conductive pieces 110 abutting therewith, thereby ensuring that the first conductive pieces 110 can be deflected based on the tangent point of the second conductive piece 120 contacted thereby.

[0041] For the second inner conductive layer 122, the side portion of any one second conductive piece 120 close to the inner sheath 20 is accommodated in the second gap 15 formed by the two first conductive pieces 110 in the first inner conductive layer 112, and the side portion of any one second conductive piece 120 away from the inner sheath 20 is accommodated in the gap between the two adjacent second elastic protrusions 130, so as to realize that any one first conductive piece 110 in the first inner conductive layer 112 is limited by the four second conductive pieces 120, and the tangential contact is formed between the first conductive piece 110 and the four second conductive pieces 120, so as to ensure that the first conductive piece 110 can be deflected based on the tangent point of the second conductive piece 120 contacted by the first conductive piece 110. At the same time, any one second conductive piece 120 in the second inner conductive layer 122 is limited by the two first conductive pieces 110 and the two second elastic protrusions 130, so as to ensure the compactness of the structure of the entire conductive assembly 10.

[0042] In this way, when the first zone 23 is pressed, the first elastic protrusion 22 contacts the two first conductive pieces 110, the proximal ends of the two first conductive pieces 110 are deflected towards the center piece 13 based on the outer surface of the second conductive piece 120 contacted by the two first conductive pieces 110, and the distal ends of the two second conductive pieces 120 are deflected towards the inner sheath 20 based on the outer surface of the first elastic protrusion 22 contacted by the two second conductive pieces 120, so as to buffer the pressure borne by the first conductive piece 110, and the deflection of the distal ends of the two first conductive pieces 110 supports the other two first elastic protrusions 22, so as to distribute the pressure borne by the first zone 23 to the adjacent other first elastic protrusions 22, and further improve the pressure resistance of the conductive assembly 10. In addition, based on the first elastic protrusion 22 adopting the material with elastic deformation, the deflection space is provided for the first conductive piece 110 by the elastic deformation of the first elastic protrusion 22.

[0043] In addition, when the second conductive member 120 of the second outer conductive layer 121 is pressed by the first conductive member 110 outside thereof, the second conductive member 120 continues to press the two first conductive members 110 of the first inner conductive layer 112 it contacts, so that the two first conductive members 110 are deflected based on the outer circumferential surface of the second conductive member 120 of the second inner conductive layer 122, and the second conductive member 120 of the second inner conductive layer 122 is pressed and is limited by the two second elastic protrusions 130 clamping it, so as to ensure the stability of the structure and not to cause the innermost structure of the conductive assembly 10 to be loose. At the same time, the center member 13 and the second elastic protrusion 130 are made of a material that can be elastically deformed to a certain extent, so that the second conductive member 120 of the second inner conductive layer 122 has a space to move inward, thereby ensuring that the first conductive member 110 has a space to deflect inward at the pressed end. When the first conductive member 110 of the first inner conductive layer 112 is pressed and deflected, the end of the first conductive member 110 away from the pressed end deflects outward along the outer circumferential surface of the second conductive member 120 of the second outer conductive layer 121, and when the second conductive member 120 of the second outer conductive layer 121 is subjected to an outward force, the second conductive member 120 can resist the first conductive member 110 of the first outer conductive layer 111 outward, and the first conductive member 110 of the first outer conductive layer 111 has a space to deflect outward based on the presence of the first elastic protrusion 22, thereby ensuring the smooth deflection and sliding of each first conductive member 110 and second conductive member 120 in the conductive assembly 10, and ensuring better buffering capacity of the entire conductive assembly 10.

[0044] When the second zone 24 is pressed, the second zone 24 directly acts on the middle zone of the first conductive member 110 of the first outer conductive layer 111, the first conductive member 110 in turn resists the two second conductive members 120 located inside it, the two second conductive members 120 in turn resist the two first conductive members 110 located inside them, and the two first conductive members 110 in turn deflect based on the outer circumferential surface of the second conductive member 120 of the second inner conductive layer 122. The deflection mode is as described above and will not be described again.

[0045] In particular, the center member 13 can adopt a hollow structure shape to ensure that the second conductive member 120 of the second inner conductive layer 122 has the ability to slide inwardly within a small range.

[0046] In this embodiment, the size of the first conductive member 110 of the first outer conductive layer 111 is larger than the size of the first conductive member 110 of the first inner conductive layer 112, and the size of the second conductive member 120 of the second outer conductive layer 121 is larger than the size of the second conductive member 120 of the second inner conductive layer 122.

[0047] Please refer to Figs. 1-2In an embodiment, the buffer assembly 30 comprises a first buffer layer 31 and a second buffer layer 32, the first buffer layer 31 is arranged around the outer circumferential surface of the inner sheath 20, and the second buffer layer 32 is arranged around the outer circumferential surface of the first buffer layer 31.

[0048] The first buffer layer 31 comprises a plurality of first buffer pieces 311 and a plurality of second buffer pieces 312, the plurality of first buffer pieces 311 are arranged in sequence and spaced apart around the outer circumferential surface of the inner sheath 20, and the plurality of second buffer pieces 312 are arranged in sequence and spaced apart around the outer circumferential surface of the inner sheath 20. Along the circumferential direction of the inner sheath 20, the plurality of first buffer pieces 311 and the plurality of second buffer pieces 312 are arranged alternately, that is, one second buffer piece 312 is arranged between any two adjacent first buffer pieces 311, one first buffer piece 311 is arranged between any two adjacent second buffer pieces 312, and any adjacent first buffer piece 311 and second buffer piece 312 abut each other.

[0049] Along the radial direction of the submarine cable, the surfaces of the opposite sides of the first buffer piece 311 are both curved surfaces, the surface of the side of the first buffer piece 311 close to the inner sheath 20 is attached to the inner sheath 20, and the surface of the side of the first buffer piece 311 away from the inner sheath 20 is attached to the outer sheath assembly 40. Along the circumferential direction of the inner sheath 20, the end surfaces of the opposite ends of the first buffer piece 311 can be curved surfaces or flat surfaces. The shape of the second buffer piece 312 is the same as that of the first buffer piece 311.

[0050] In the embodiment, the first buffer piece 311 and the second buffer piece 312 are both made of a plastic material with a certain elasticity. The first buffer piece 311 is arranged in a solid structure, and the first buffer piece 311 is attached to the outer circumferential surface of the first zone 23, and the second buffer piece 312 is arranged in a hollow structure, and the second buffer piece 312 is attached to the outer circumferential surface of the second zone 24.

[0051] The first buffer member 311 with solid structure and the second buffer member 312 with hollow structure are arranged alternately, which can reduce the weight of the submarine cable and improve the flexibility of the first buffer layer 31. In addition, the second buffer member 312 is arranged corresponding to the second zone 24. When the second buffer member 312 is pressed, the second buffer member 312 has strong buffering capacity itself, which can reduce the pressure applied by the second buffer member 312 to the second zone 24, so as to avoid the second zone 24 applying large pressure to the middle zone of the contacted first conductive member 110, and avoid the first conductive member 110 being directly abutted by the two second conductive members 120 on the inner side thereof when the first conductive member 110 is subjected to large pressure, so as to cause the two second conductive members 120 to be pressed too much. The first buffer member 311 is arranged corresponding to the first zone 23. When the first buffer member 311 is pressed, the first buffer member 311 transmits the pressure to the first elastic protrusion 22, the first elastic protrusion 22 can buffer the pressure, and the first elastic protrusion 22 is abutted by the two first conductive members 110 contacted thereby when being pressed, so as to deflect the first conductive member 110, which can buffer the pressure in time, so that the first buffer member 311 can be provided in solid structure, the first buffer member 311 with solid structure is arranged around the outer circumferential surface of the inner sheath 20, which can ensure that the inner sheath 20 can maintain the shape without too much change when being subjected to the deflection action of the first conductive member 110, and the plurality of first buffer members 311 can stably support the outer sheath assembly 40 on the outer side thereof, which can ensure the structural strength of the whole submarine cable.

[0052] In particular, the second buffer member 312 can be filled with a filling rope or other elastic material elements.

[0053] Please refer to Figs. 1-2 In an embodiment, the second buffer layer 32 includes a plurality of third buffer members 321, the plurality of third buffer members 321 are arranged around the outer periphery of the first buffer layer 31, and any two adjacent third buffer members 321 abut each other.

[0054] The third buffer member 321 has a circular cross-sectional shape, and the third buffer member 321 is made of plastic material. A semi-conductive shielding belt or the like structure can be arranged between the first buffer layer 31 and the second buffer layer 32, the plurality of third buffer members 321 are clamped between the semi-conductive shielding belt and the outer sheath assembly 40, and the outer sheath assembly 40 is supported by the plurality of third buffer members 321.

[0055] In the embodiment, the submarine cable 100 with large cross-section and high buffering capacity further includes an optical unit 50, two third buffer members 321 in the second buffer layer 32 are arranged at intervals and form an accommodation space 322, the optical unit 50 is located in the accommodation space 322, and the optical unit 50 is clamped between the second buffer member 312 and the outer sheath assembly 40.

[0056] The optical unit 50 is a communication optical fiber or a temperature measuring optical fiber, etc. The optical unit 50 is elastically clamped by the two third buffer members 321 forming the accommodation space 322, so as to ensure the stability of the position of the optical unit 50. In addition, the accommodation space 322 can be two or other number, and each accommodation space 322 can accommodate one optical unit 50. The optical unit 50 is arranged corresponding to the second buffer member 312, so that when the outer protection assembly 40 is pressed and acts on the optical unit 50, the optical unit 50 can act on the second buffer member 312. The second buffer member 312 is a hollow structure, and the optical unit 50 will not be damaged by the elastic deformation of the second buffer member 312. In addition, the gap between the third buffer members 321 in the second buffer layer 32 can be filled with water-blocking glue or water-blocking powder, so as to improve the waterproof function of the second buffer layer 32.

[0057] It can be understood that the gap between the first buffer member 311 and the second buffer member 312 in the first buffer layer 31 can also be filled with water-blocking glue or water-blocking powder. Whether the first buffer layer 31 and the second buffer layer 32 are filled with water-blocking material and the specific type of water-blocking material can be selected according to actual needs, which is not limited in the present application.

[0058] In the embodiment, the outer protection assembly 40 can be composed of at least one of the insulation layer, the insulation shielding layer, the armored layer, the outer sheath, etc. The outer protection assembly 40 can also include a waterproof layer and other structures. In the present application, the specific structure of the outer protection assembly 40 is not limited, and the structure of the outer protection assembly 40 can be designed according to the actual needs and the existing products by those skilled in the art.

[0059] In the above, the specific embodiments of the present application are described with reference to the drawings. However, those skilled in the art can understand that various changes and replacements can be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and replacements are within the scope defined by the present application.

Claims

1. A submarine cable with large cross-section and high buffering performance, characterized in that: include: an inner sheath having a receiving cavity therein; a conductive assembly located in the receiving cavity, the conductive assembly comprising at least one first conductive layer and at least one second conductive layer, the at least one first conductive layer and the at least one second conductive layer being arranged around the inner wall of the inner sheath, and the at least one first conductive layer and the at least one second conductive layer being arranged alternately; the first conductive layer comprising a plurality of first conductive elements, and the second conductive layer comprising a plurality of second conductive elements; a buffer assembly disposed around the outer circumference of the inner sheath; An outer protection component is arranged around the outer peripheral surface of the buffer component; Among them, any one of the second conductive parts is at least partially located between two adjacent first conductive parts of its adjacent first conductive layer, and the second conductive part abuts against the two adjacent first conductive parts, and the inner circumferential surface of the inner sheath is convexly provided with a plurality of first elastic protrusions, and any one of the first elastic protrusions is at least partially located between two adjacent first conductive parts of its adjacent first conductive layer, and the first elastic protrusion abuts against the two adjacent first conductive parts, and is used to abut against the deflection of the two adjacent first conductive parts relative to the second conductive part.

2. The large-cross-section high-buffer submarine cable according to claim 1, characterized in that: The cross-sectional shape of the first conductive member is set to be elliptical, and the cross-sectional shape of the second conductive member is set to be circular.

3. The large-cross-section high-buffer submarine cable according to claim 2, characterized in that: A first gap and a second gap are provided between two adjacent first conductive members located on the same layer, and the first gap is located on a side of the second gap close to the inner sheath; The first gap is configured to accommodate a portion of the first elastic protrusion or the second conductive member, and the first elastic protrusion and the second conductive member located in the first gap abut against the two first conductive members forming the first gap; The second gap is configured to accommodate a portion of the second conductive member, and a portion of the second conductive member located in the second gap abuts against the two first conductive members forming the second gap.

4. The large-cross-section high-buffer submarine cable according to claim 3, characterized in that: The number of the multiple first elastic protrusions is the same as the number of the multiple second conductive parts of the second conductive layer that is closest to each other, and the multiple first elastic protrusions are arranged in a one-to-one correspondence with the multiple second conductive parts. The first elastic protrusions and their corresponding second conductive parts are respectively partially accommodated in the first gap and the second gap formed between two adjacent first conductive parts in the same group.

5. The large-cross-section high-buffer submarine cable according to claim 4, characterized in that: The conductive assembly further includes a center piece, a plurality of second elastic protrusions are convexly provided on the outer circumference of the center piece, and the plurality of second elastic protrusions are sequentially spaced around the outer circumference of the center piece; The second conductive layer is provided on the outer periphery of the central member, and any one of the second elastic protrusions is at least partially located between two adjacent second conductive members and abuts against the two adjacent second conductive members.

6. The large-cross-section high-buffer submarine cable according to claim 5, characterized in that: One end of the second conductive member close to the inner sheath is accommodated in the second gap, and one end of the second conductive member away from the inner sheath is accommodated in the first gap or in the space between two adjacent second elastic protrusions.

7. The large-cross-section high-buffer submarine cable according to claim 1, characterized in that: The buffer assembly includes a first buffer layer and a second buffer layer. The first buffer layer is arranged around the outer circumference of the inner sheath, and the second buffer layer is arranged around the outer circumference of the first buffer layer.

8. The large-cross-section high-buffer submarine cable according to claim 7, characterized in that: The first buffer layer includes a plurality of first buffer members and a plurality of second buffer members, and the plurality of first buffer members and the plurality of second buffer members are alternately arranged along the circumference of the inner sheath; The inner sheath includes a plurality of first sections and a plurality of second sections. The plurality of first sections and the plurality of second sections are alternately arranged along the circumference of the first buffer layer. The first elastic protrusion is protruded from the inner wall of any one of the first sections. The first buffer is a solid structure and is attached to the outer peripheral surface of the first section. The second buffer is a hollow structure and is attached to the outer peripheral surface of the second section.

9. The large-cross-section high-buffer submarine cable according to claim 8, characterized in that: The second buffer layer includes a plurality of third buffer members, and the plurality of third buffer members are arranged around the outer circumference of the first buffer layer.

10. The large-cross-section high-buffer submarine cable according to claim 9, characterized in that: The large-section, high-buffer submarine cable also includes an optical unit. The two third buffer members in the second buffer layer are spaced apart to form a receiving space. The optical unit is located in the receiving space and is sandwiched between the second buffer member and the outer protective assembly.

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