Dynamic submarine optical cable

Abstract

The application provides a dynamic submarine optical cable, which comprises an optical fiber assembly, an inner sheath, a first armor layer, a first buffer assembly, a second armor layer and a second buffer assembly; the inner sheath is annularly arranged on the outer periphery of the optical fiber assembly; the first armor layer is annularly arranged on the outer periphery of the inner sheath; the first buffer assembly comprises a first buffer layer and a second buffer layer which are sequentially arranged on the outer periphery of the first armor layer; along the radial direction of the inner sheath, the first buffer layer and the second buffer layer elastically abut each other, and the first buffer layer and the second buffer layer can slide in the radial direction; the second armor layer is annularly arranged on the outer periphery of the first buffer assembly; the second buffer assembly comprises a third buffer layer and a fourth buffer layer which are sequentially arranged on the outer periphery of the second armor layer; along the radial direction of the inner sheath, the third buffer layer and the fourth buffer layer elastically abut each other, and the third buffer layer and the fourth buffer layer can slide in the radial direction; the radial sliding resistance between the first buffer layer and the second buffer layer is smaller than the radial sliding resistance between the third buffer layer and the fourth buffer layer.

Description

Technical Field

[0001] This application relates to the field of submarine cable technology, and in particular to a dynamic submarine optical cable. Background Technology

[0002] Most existing submarine optical cables are equipped with double-layer reverse twisted armor to improve torsional resistance, but the radial buffering performance of the entire submarine optical cable is relatively weak. Summary of the Invention

[0003] This application provides a dynamic submarine optical cable to address the problem of poor radial buffering performance in existing submarine optical cables.

[0004] This application provides a dynamic submarine optical cable, including an optical fiber assembly, an inner sheath, a first armor layer, a first buffer assembly, a second armor layer, and a second buffer assembly. The inner sheath is disposed around the outer periphery of the optical fiber assembly. The first armor layer is disposed around the outer periphery of the inner sheath. The first buffer assembly includes a first buffer layer and a second buffer layer sequentially disposed around the outer periphery of the first armor layer. Along the radial direction of the inner sheath, the first buffer layer and the second buffer layer elastically abut against each other, and the first buffer layer and the second buffer layer are radially slidable. The second armor layer is disposed around the outer periphery of the first buffer assembly. The second buffer assembly includes a third buffer layer and a fourth buffer layer sequentially disposed around the outer periphery of the second armor layer. Along the radial direction of the inner sheath, the third buffer layer and the fourth buffer layer elastically abut against each other, and the third buffer layer and the fourth buffer layer are radially slidable. The radial sliding resistance between the first buffer layer and the second buffer layer is less than the radial sliding resistance between the third buffer layer and the fourth buffer layer.

[0005] In one possible implementation, the first buffer layer includes a first buffer body and a plurality of first protrusions, the plurality of first protrusions being disposed on the side of the first buffer body away from the inner sheath; The second buffer layer includes a second buffer body and a plurality of second protrusions, wherein the plurality of second protrusions are disposed on the side of the second buffer body near the inner sheath; Wherein, any two adjacent first protrusions are circumferentially spaced to form a first buffer groove, and the second protrusion is at least partially located within the first buffer groove.

[0006] In one possible implementation, along the radial direction of the inner sheath, the first buffer body and the second buffer body are spaced apart, the first protrusion is spaced apart from the second buffer body, and the second protrusion is spaced apart from the bottom wall of the first buffer groove.

[0007] In one possible implementation, the third buffer layer includes a third buffer body and a plurality of third protrusions, wherein the plurality of third protrusions are disposed on the side of the third buffer body away from the inner sheath. The fourth buffer layer includes a fourth buffer body and a plurality of fourth protrusions, wherein the plurality of fourth protrusions are disposed on the side of the fourth buffer body near the inner sheath; Wherein, any two adjacent fourth protrusions are circumferentially spaced to form a second buffer groove, and the third protrusion is at least partially located within the second buffer groove.

[0008] In one possible implementation, along the radial direction of the inner sheath, the third buffer body and the fourth buffer body are spaced apart, the fourth protrusion is spaced apart from the third buffer body, and the third protrusion is spaced apart from the bottom wall of the second buffer groove.

[0009] In one possible implementation, the two opposite walls of the first buffer groove in the circumferential direction are designated as first groove walls, and the two first groove walls are inclined relative to each other and form a first included angle. The two opposite walls of the second buffer groove in the circumferential direction are designated as the second groove walls, and the two second groove walls are inclined relative to each other and form a second included angle; Wherein, the first included angle is smaller than the second included angle.

[0010] In one possible implementation, the outer peripheral surface of the second protrusion is configured as a first arc surface, and the first arc surface abuts against the two first groove walls; The outer peripheral surface of the third protrusion is configured as a second arc surface, and the second arc surface abuts against the two second groove walls.

[0011] In one possible implementation, both the second protrusion and the third protrusion are capable of elastic deformation, and the second protrusion has a greater capacity for elastic deformation than the third protrusion.

[0012] In one possible implementation, the number of the plurality of first protrusions is greater than the number of the plurality of fourth protrusions.

[0013] In one possible implementation, the first armor layer includes a plurality of first armor members, and the second armor layer includes a plurality of second armor members.

[0014] The dynamic submarine optical cable of this application has a first buffer component on the outside of the first armor layer and a second buffer component on the outside of the second armor layer. The first buffer layer and the second buffer layer in the first buffer component elastically resist each other and can slide radially relative to each other. The third buffer layer and the fourth buffer layer in the second buffer component elastically resist each other and can slide radially relative to each other, thereby realizing radial buffering of the entire dynamic submarine optical cable. The radial sliding resistance between the first buffer layer and the second buffer layer is less than the radial sliding resistance between the third buffer layer and the fourth buffer layer, making the mechanical strength of the second buffer layer on the outside stronger and able to withstand a larger impact force first. The first buffer layer on the inside has a stronger buffering capacity and can significantly buffer the weakened impact force transmitted to the first buffer layer. Thus, the layered buffering of the entire dynamic submarine optical cable is achieved while ensuring the mechanical strength of the entire cable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the dynamic submarine optical cable of this application in one embodiment.

[0016] Figure 2 for Figure 1 A partially enlarged schematic diagram of region II corresponding to the dynamic submarine optical cable.

[0017] Key component symbols: 100, Dynamic submarine optical cable; A1, First included angle; A2, Second included angle; P1, First trench wall; P2, First arc surface; P3, Second trench wall; P4, Second arc surface; 10, Optical fiber assembly; 11, Stainless steel tube; 12, Fiber core; 20, Inner sheath; 30, First armor layer; 31, First armor component; 40, First buffer assembly; 41, First buffer layer; 411, First buffer body; 412, First protrusion; 413. 414. First buffer groove; 42. First fitting part; 42. Second buffer layer; 421. Second buffer body; 422. Second protrusion; 423. Second fitting part; 50. Second armor layer; 51. Second armor piece; 60. Second buffer assembly; 61. Third buffer layer; 611. Third buffer body; 612. Third protrusion; 62. Fourth buffer layer; 621. Fourth buffer body; 622. Fourth protrusion; 623. Second buffer groove; 70. Outer sheath.

[0018] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0019] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may 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 the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. The same reference numerals denote the same or similar components.

[0020] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but does not exclude 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 used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant art and in the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

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

[0023] like Figures 1 to 2 As shown, this embodiment provides a dynamic submarine optical cable 100, including an optical fiber assembly 10, an inner sheath 20, a first armor layer 30, a first buffer assembly 40, a second armor layer 50, and a second buffer assembly 60.

[0024] The inner sheath 20 is made of cross-linked polyethylene or other insulating materials, and the inner sheath 20 is roughly a circular structure. The inner sheath 20 is arranged around the outer periphery of the optical fiber assembly 10 to protect the optical fiber assembly 10.

[0025] A first armor layer 30 is circumferentially disposed around the outer periphery of the inner sheath 20. A first buffer assembly 40 includes a first buffer layer 41 and a second buffer layer 42 sequentially disposed around the outer periphery of the first armor layer 30. Along the radial direction of the inner sheath 20, the first buffer layer 41 and the second buffer layer 42 elastically abut against each other, and are radially slidable between them. A second armor layer 50 is circumferentially disposed around the outer periphery of the first buffer assembly 40. A second buffer assembly 60 includes a third buffer layer 61 and a fourth buffer layer 62 sequentially disposed around the outer periphery of the second armor layer 50. Along the radial direction of the inner sheath 20, the third buffer layer 61 and the fourth buffer layer 62 elastically abut against each other, and are radially slidable between them. The radial sliding resistance between the first buffer layer 41 and the second buffer layer 42 is less than the radial sliding resistance between the third buffer layer 61 and the fourth buffer layer 62.

[0026] Thus, the dynamic submarine optical cable 100 of this application has a first buffer assembly 40 on the outside of the first armor layer 30 and a second buffer assembly 60 on the outside of the second armor layer 50. The first buffer layer 41 and the second buffer layer 42 in the first buffer assembly 40 elastically resist each other and can slide radially relative to each other. The third buffer layer 61 and the fourth buffer layer 62 in the second buffer assembly 60 elastically resist each other and can slide radially relative to each other. This achieves radial buffering of the entire dynamic submarine optical cable 100. The radial sliding resistance between the first buffer layer 41 and the second buffer layer 42 is less than the radial sliding resistance between the third buffer layer 61 and the fourth buffer layer 62. This makes the mechanical strength of the second buffer layer 42 on the outside stronger and able to withstand a larger impact force first. The buffering capacity of the first buffer layer 41 on the inside is stronger and can significantly buffer the weakened impact force transmitted to the first buffer layer 41. Thus, the layered buffering of the entire dynamic submarine optical cable 100 is achieved while ensuring the mechanical strength of the entire dynamic submarine optical cable 100.

[0027] Please combine Figures 1 to 2 In one embodiment, the optical fiber assembly 10 includes a plurality of fiber cores 12 and a stainless steel tube 11. The fiber cores 12 enable signal transmission, and the stainless steel tube 11 is a tubular structure made of stainless steel. The plurality of fiber cores 12 are inserted into the stainless steel tube 11, and the stainless steel tube 11 is filled with fiber grease.

[0028] It is worth noting that the number of fiber cores 12 can be adapted to actual needs, such as choosing six, eight, or twelve.

[0029] In this embodiment, the first armor layer 30 includes a plurality of first armor members 31, which are arranged around the outer periphery of the inner sheath 20. The first armor members 31 may be made of galvanized steel wire, and the cross-sectional shape of the first armor members 31 is approximately circular. Along the circumference of the inner sheath 20, any two adjacent first armor members 31 abut against each other. In addition, the plurality of first armor members 31 are sandwiched between the inner sheath 20 and the first buffer layer 41.

[0030] Please combine Figures 1 to 2 In one embodiment, the first buffer layer 41 may be made of a plastic material such as cross-linked polyethylene. The first buffer layer 41 includes a first buffer body 411 and a plurality of first protrusions 412. The first buffer body 411 is generally a circular ring structure, and the plurality of first protrusions 412 are disposed on the side of the first buffer body 411 away from the inner sheath 20, and the plurality of first protrusions 412 are integrally formed with the first buffer body 411.

[0031] Multiple first protrusions 412 are arranged around the outer periphery of the first buffer body 411, and any two adjacent first protrusions 412 are spaced apart and form a first buffer groove 413 between them.

[0032] In this embodiment, the second buffer layer 42 may be made of an elastic material such as polyurethane elastomer or rubber, which is capable of elastic deformation. The second buffer layer 42 includes a second buffer body 421 and a plurality of second protrusions 422. The second buffer body 421 is generally an annular structure, and the plurality of second protrusions 422 are disposed on the side of the second buffer body 421 near the inner sheath 20, and the plurality of second protrusions 422 are integrally formed with the second buffer body 421.

[0033] Multiple second protrusions 422 are arranged around the inner periphery of the second buffer body 421, and any two adjacent second protrusions 422 are spaced apart. The number of the multiple second protrusions 422 is the same as the number of the multiple first buffer grooves 413, and they are arranged in a one-to-one correspondence. Each second protrusion 422 is partially located in its corresponding first buffer groove 413, so that the multiple second protrusions 422 and the multiple first protrusions 412 are staggered to form a first fitting structure.

[0034] In this embodiment, the cross-sectional shape of the first protrusion 412 is approximately an isosceles trapezoid, and the cross-sectional shape of the first buffer groove 413 formed between two adjacent first protrusions 412 is also approximately an isosceles trapezoid. The groove width of the portion of the first buffer groove 413 near the inner sheath 20 is smaller than the groove width of the portion away from the inner sheath 20.

[0035] The first buffer groove 413 has two opposite groove walls in the circumferential direction, which are designated as first groove walls P1. Both first groove walls P1 are inclined planes, and the two first groove walls P1 are inclined relative to each other and form a first included angle A1.

[0036] In this embodiment, the cross-sectional shape of the second protrusion 422 is approximately arched. The outer peripheral surface of the second protrusion 422 is designated as a first arc surface P2. Along the circumference of the inner sheath 20, the opposite ends of the first arc surface P2 abut against two first groove walls P1, and the first arc surface P2 is tangent to the two first groove walls P1. This allows the second protrusion 422 to undergo elastic deformation and move inward within the first buffer groove 413 through the two first groove walls P1. Furthermore, the first arc surface P2 abuts against the two first groove walls P1 in the circumferential direction, achieving circumferential abutment between the first protrusion 412 and the second protrusion 422, thereby achieving circumferential positioning between the first buffer layer 41 and the second buffer layer 42.

[0037] In particular, the second protrusion 422 can be configured as a hollow structure to make the second protrusion 422 more prone to elastic deformation, thereby reducing the resistance of the second buffer layer 42 to radial sliding relative to the first buffer layer 41.

[0038] In this embodiment, along the radial direction of the inner sheath 20, the first buffer body 411 and the second buffer body 421 are spaced apart, the first protrusion 412 is spaced apart from the second buffer body 421, and the second protrusion 422 is spaced apart from the bottom wall of the first buffer groove 413. That is, the protrusion length of the first protrusion 412 and the protrusion length of the second protrusion 422 are both less than the distance between the first buffer body 411 and the second buffer body 421, so that the second buffer layer 42 can slide radially relative to the first buffer layer 41.

[0039] Please combine Figures 1 to 2 In one embodiment, the second armor layer 50 includes a plurality of second armor members 51, which are disposed around the outer periphery of the second buffer layer 42. The second armor members 51 may be made of galvanized steel wire, and their cross-sectional shape is approximately circular. Along the circumference of the inner sheath 20, any two adjacent second armor members 51 abut against each other. Furthermore, the plurality of second armor members 51 are sandwiched between the second buffer layer 42 and the third buffer layer 61.

[0040] In this embodiment, the third buffer layer 61 may be made of an elastic material such as polyurethane elastomer or rubber, which is capable of elastic deformation. The third buffer layer 61 includes a third buffer body 611 and a plurality of third protrusions 612. The third buffer body 611 is generally a ring structure, and the plurality of third protrusions 612 are disposed on the side of the third buffer body 611 away from the inner sheath 20, and the plurality of third protrusions 612 are integrally formed with the third buffer body 611.

[0041] Multiple third protrusions 612 are arranged around the outer periphery of the third buffer body 611, and any two adjacent third protrusions 612 are spaced apart.

[0042] In this embodiment, the fourth buffer layer 62 may be made of a plastic material such as cross-linked polyethylene. The fourth buffer layer 62 includes a fourth buffer body 621 and a plurality of fourth protrusions 622. The fourth buffer body 621 is generally a circular structure, and the plurality of fourth protrusions 622 are disposed on the side of the fourth buffer body 621 near the inner sheath 20, and the plurality of fourth protrusions 622 are integrally formed with the fourth buffer body 621.

[0043] Multiple fourth protrusions 622 are arranged around the inner periphery of the fourth buffer body 621, and any two adjacent fourth protrusions 622 are spaced apart to form a second buffer groove 623. Multiple third protrusions 612 are the same number as the multiple second buffer grooves 623 and are arranged in a one-to-one correspondence. Each third protrusion 612 is partially located in its corresponding second buffer groove 623, so that the multiple fourth protrusions 622 and the multiple third protrusions 612 are staggered to form a second interlocking structure.

[0044] In this embodiment, the cross-sectional shape of the fourth protrusion 622 is approximately an isosceles trapezoid, and the cross-sectional shape of the second buffer groove 623 formed between two adjacent fourth protrusions 622 is also approximately an isosceles trapezoid. The width of the second buffer groove 623 at the end near the inner sheath 20 is greater than the width of the end away from the inner sheath 20.

[0045] The second buffer groove 623 has two opposing groove walls in the circumferential direction designated as second groove walls P3. Both second groove walls P3 are inclined planes, and the two second groove walls P3 are inclined relative to each other, forming a second included angle A2. The first included angle A1 is smaller than the second included angle A2, so that the sliding resistance of the third protrusion 612 in the second buffer groove 623 is greater than the sliding resistance of the second protrusion 422 in the first buffer groove 413. This results in the radial sliding ability of the fourth buffer layer 62 relative to the third buffer layer 61 being less than the radial sliding ability of the second buffer layer 42 relative to the first buffer layer 41. This allows the second buffer assembly 60, in conjunction with the second armor layer 50, to act as the main support structure to withstand the external pressure on the submarine optical cable. After the external pressure is transmitted to the first buffer assembly 40 through the second buffer assembly 60 and the second armor layer 50, the second buffer layer 42 of the first buffer assembly 40 slides radially relative to the first buffer layer 41, further buffering the pressure that is reduced layer by layer, ensuring that the pressure finally transmitted to the inner sheath 20 is small and will not damage the optical fiber assembly 10 inside.

[0046] In this embodiment, the cross-sectional shape of the third protrusion 612 is approximately fan-shaped. The outer peripheral surface of the third protrusion 612 is designated as a second arc surface P4. Along the circumference of the inner sheath 20, the opposite ends of the second arc surface P4 abut against two second groove walls P3, and the second arc surface P4 is tangent to the two second groove walls P3. This allows the third protrusion 612 to undergo elastic deformation and move inward within the second buffer groove 623 through the two second groove walls P3. Furthermore, the second arc surface P4 abuts against the two second groove walls P3 in the circumferential direction, enabling circumferential abutment between the third protrusion 612 and the fourth protrusion 622, thereby achieving circumferential positioning between the third buffer layer 61 and the fourth buffer layer 62.

[0047] Both the second protrusion 422 and the third protrusion 612 are capable of elastic deformation, and the second protrusion 422 has a greater capacity for elastic deformation than the third protrusion 612. Specifically, the third protrusion 612 is designed as a solid structure so that it is less prone to elastic deformation compared to the hollow second protrusion 422.

[0048] In this embodiment, along the radial direction of the inner sheath 20, the third buffer body 611 and the fourth buffer body 621 are spaced apart, the fourth protrusion 622 is spaced apart from the third buffer body 611, and the third protrusion 612 is spaced apart from the bottom wall of the second buffer groove 623. That is, the protrusion length of the third protrusion 612 and the protrusion length of the fourth protrusion 622 are both less than the distance between the third buffer body 611 and the fourth buffer body 621, so that the fourth buffer layer 62 can slide radially relative to the third buffer layer 61.

[0049] In this embodiment, the number of the plurality of first protrusions 412 is greater than the number of the plurality of fourth protrusions 622, so that the degree of fitting of the first interlocking structure is greater than the degree of fitting of the second interlocking structure, making the entire submarine optical cable exhibit a state where the inside is tighter than the outside, which can improve the structural strength of the layer structure adjacent to the optical fiber assembly 10 and prevent damage to the optical fiber assembly 10.

[0050] Furthermore, since the fourth buffer layer 62 is made of a plastic material and the third buffer layer 61 is made of an elastic material, when the submarine optical cable is under pressure, the elastic third buffer layer 61 acts as the pressure-bearing body, and the elastic deformation of the third buffer layer 61 offsets the instantaneous pressure applied by the fourth buffer layer 62, thereby improving the impact resistance. Simultaneously, since the second buffer layer 42 is made of an elastic material and the first buffer layer 41 is made of a plastic material, when pressure is transmitted to the second buffer layer 42, the second buffer layer 42 compresses the first buffer layer 41, causing the second buffer layer 42 to undergo elastic deformation to buffer the pressure. The first buffer layer 41 then serves to support and stabilize the optical fiber assembly 10 inside it.

[0051] The second buffer layer 42 and the third buffer layer 61 are respectively located on the inner and outer sides of the second armor layer 50. The second armor layer 50 has greater strength and can play a stable supporting role. The second armor layer 50, together with the second buffer layer 42 and the third buffer layer 61, forms a buffer structure. The pressure on the submarine optical cable is mainly buffered by this buffer structure, avoiding excessive pressure transmission to the inner sheath 20 and the optical fiber assembly 10 inside. Meanwhile, the buffer structure is sandwiched between the first buffer layer 41 and the fourth buffer layer 62 made of plastic material, so that the internal structure formed by the first armor layer 30 and the first buffer layer 41 of the submarine optical cable and the outer structure formed by the fourth buffer layer 62 and the outer sheath 70 have high strength. The outer structure has high strength and can withstand greater pressure, while the internal structure has high strength and can effectively protect the optical fiber assembly 10 inside. The intermediate structure, as a transition structure, can achieve buffering. It not only provides elastic support to prevent the external structure from being easily damaged when it is subjected to greater pressure, but also buffers the pressure transmitted to this point step by step to reduce the pressure transmitted to the first armor layer 30, thereby realizing the graded pressure-resistant buffering system of the submarine optical cable.

[0052] In addition, the first buffer layer 41, the second buffer layer 42, the third buffer layer 61 and the fourth buffer layer 62 are all provided with multiple circumferentially spaced protrusions, which can improve the bending performance of the entire submarine optical cable while achieving radial buffering.

[0053] Please combine Figures 1 to 2 In one embodiment, a plurality of first fitting portions 414 protrude from the side of the first buffer body 411 near the inner sheath 20, and the plurality of first fitting portions 414 are integrally formed with the first buffer body 411. The plurality of first fitting portions 414 are arranged around the inner circumference of the first buffer body 411, and any two adjacent first fitting portions 414 are spaced apart. The plurality of first fitting portions 414 are correspondingly arranged with a plurality of first armor members 31, so that each first fitting portion 414 can be inserted into the gap between two adjacent first armor members 31, thereby realizing circumferential positioning between the first armor layer 30 and the first buffer layer 41.

[0054] The second buffer body 421 has a plurality of second fitting portions 423 protruding from the side away from the inner sheath 20. The plurality of second fitting portions 423 are integrally formed with the second buffer body 421. The plurality of second fitting portions 423 are arranged around the outer periphery of the second buffer body 421, and any two adjacent second fitting portions 423 are spaced apart. The plurality of second fitting portions 423 are correspondingly arranged with a plurality of second armor pieces 51, so that each second fitting portion 423 can be inserted into the gap between two adjacent second armor pieces 51, thereby achieving circumferential positioning between the second armor layer 50 and the second buffer layer 42.

[0055] Furthermore, the twisting directions between the first armor layer 30 and the second armor layer 50 are opposite, and the first buffer layer 41 and the second buffer layer 42 can achieve circumferential limiting through the first protrusion 412 and the second protrusion 422, thereby achieving circumferential limiting between the first armor layer 30, the first buffer layer 41, the second buffer layer 42 and the second armor layer 50, thereby improving the torsional resistance of the entire submarine optical cable.

[0056] It is understood that in some embodiments, the dimensions of the first armor member 31 are the same as those of the second armor member 51. It is also understood that in other embodiments, the dimensions of the second armor member 51 are larger than those of the first armor member 31, so that the second armor layer 50 formed by the second armor member 51 has higher strength and can provide stable support, thereby ensuring that the buffer structure formed by it, together with the second buffer layer 42 and the third buffer layer 61, has excellent buffering capacity while its strength is protected by the second armor layer 50. In this case, the torsional resistance can be ensured by adjusting the twisting angle and the number of second armor members 51.

[0057] In this embodiment, the dynamic submarine optical cable 100 also includes an outer sheath 70, which is wrapped around the outer periphery of the fourth buffer body 621, and the outer sheath 70 may be made of materials such as cross-linked polyethylene.

[0058] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. A dynamic submarine optical cable, characterized in that, include: Fiber optic components; An inner sheath is arranged around the outer periphery of the optical fiber assembly; The first armor layer is arranged around the outer periphery of the inner sheath; The first buffer assembly includes a first buffer layer and a second buffer layer sequentially disposed on the outer periphery of the first armor layer. Along the radial direction of the inner sheath, the first buffer layer and the second buffer layer elastically abut against each other, and the first buffer layer and the second buffer layer can slide radially between each other. The second armor layer is arranged around the outer periphery of the first buffer assembly; The second buffer assembly includes a third buffer layer and a fourth buffer layer sequentially disposed on the outer periphery of the second armor layer. Along the radial direction of the inner sheath, the third buffer layer and the fourth buffer layer elastically abut against each other, and the third buffer layer and the fourth buffer layer can slide radially between each other. The radial sliding resistance between the first buffer layer and the second buffer layer is less than the radial sliding resistance between the third buffer layer and the fourth buffer layer.

2. The dynamic submarine optical cable as described in claim 1, characterized in that, The first buffer layer includes a first buffer body and a plurality of first protrusions, wherein the plurality of first protrusions are disposed on the side of the first buffer body away from the inner sheath; The second buffer layer includes a second buffer body and a plurality of second protrusions, wherein the plurality of second protrusions are disposed on the side of the second buffer body near the inner sheath; Wherein, any two adjacent first protrusions are circumferentially spaced to form a first buffer groove, and the second protrusion is at least partially located within the first buffer groove.

3. The dynamic submarine optical cable as described in claim 2, characterized in that, Along the radial direction of the inner sheath, the first buffer body and the second buffer body are spaced apart, the first protrusion is spaced apart from the second buffer body, and the second protrusion is spaced apart from the bottom wall of the first buffer groove.

4. The dynamic submarine optical cable as described in claim 2, characterized in that, The third buffer layer includes a third buffer body and a plurality of third protrusions, wherein the plurality of third protrusions are disposed on the side of the third buffer body away from the inner sheath; The fourth buffer layer includes a fourth buffer body and a plurality of fourth protrusions, wherein the plurality of fourth protrusions are disposed on the side of the fourth buffer body near the inner sheath; Wherein, any two adjacent fourth protrusions are circumferentially spaced to form a second buffer groove, and the third protrusion is at least partially located within the second buffer groove.

5. The dynamic submarine optical cable as described in claim 4, characterized in that, Along the radial direction of the inner sheath, the third buffer body and the fourth buffer body are spaced apart, the fourth protrusion is spaced apart from the third buffer body, and the third protrusion is spaced apart from the bottom wall of the second buffer groove.

6. The dynamic submarine optical cable as described in claim 4, characterized in that, The two opposite walls of the first buffer groove in the circumferential direction are designated as the first groove walls, and the two first groove walls are inclined relative to each other and form a first included angle; The two opposite walls of the second buffer groove in the circumferential direction are designated as the second groove walls, and the two second groove walls are inclined relative to each other and form a second included angle; Wherein, the first included angle is smaller than the second included angle.

7. The dynamic submarine optical cable as described in claim 6, characterized in that, The outer peripheral surface of the second protrusion is set as a first arc surface, and the first arc surface abuts against the two first groove walls; The outer peripheral surface of the third protrusion is configured as a second arc surface, and the second arc surface abuts against the two second groove walls.

8. The dynamic submarine optical cable as described in claim 4, characterized in that, Both the second protrusion and the third protrusion are capable of elastic deformation, and the second protrusion has a greater capacity for elastic deformation than the third protrusion.

9. The dynamic submarine optical cable as described in claim 4, characterized in that, The number of the plurality of first protrusions is greater than the number of the plurality of fourth protrusions.

10. The dynamic submarine optical cable as described in claim 1, characterized in that, The first armor layer includes a plurality of first armor components, and the second armor layer includes a plurality of second armor components.

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