Three-core sea cable

Abstract

This application provides a three-core submarine cable, including an electrical unit, an optical unit, an inner sheath, an outer sheath assembly, a support frame, and multiple support assemblies. The support frame is located inside the inner sheath and has multiple receiving slots, in which the electrical units are located. The multiple support assemblies are arranged correspondingly to the multiple electrical units. Along the circumference of the inner sheath, a support assembly is provided between any two adjacent electrical units. The support assembly includes a support base, two first support mechanisms, and a second support mechanism. Along the circumference of the inner sheath, the two first support mechanisms are rotatably connected to opposite sides of the support base, and the first support mechanisms are at least partially sandwiched between the support frame and the inner sheath. The first support mechanisms elastically abut against the support frame in the radial direction. A receiving cavity is formed between the first support mechanisms and the support base, and the optical unit is located in the receiving cavity. One end of the second support mechanism is elastically connected to the support frame, and the other end movably abuts against the optical unit.

Description

Technical Field

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

[0002] Three-core submarine cables contain three electrical cores and multiple optical fiber modules. The internal structure of the entire three-core submarine cable is relatively compact, and it mostly relies on its own pressure-bearing capacity to directly withstand pressure, resulting in weak pressure-resistant buffering performance. Summary of the Invention

[0003] This application provides a three-core submarine cable to address the problem of weak pressure resistance and buffering performance of existing three-core submarine cables.

[0004] This application provides a three-core submarine cable, including an electrical unit, an optical unit, an inner sheath, an outer sheath assembly, a bracket, and multiple support assemblies. The bracket is located inside the inner sheath and has multiple receiving slots, in which the electrical unit is disposed. The multiple support assemblies are correspondingly arranged with the multiple electrical units. Along the circumference of the inner sheath, a support assembly is provided between any two adjacent electrical units. Each support assembly includes a support base, two first support mechanisms, and a second support mechanism. Along the circumference of the inner sheath, the two first support mechanisms are rotatably connected to opposite sides of the support base, and the first support mechanisms are at least partially sandwiched between the bracket and the inner sheath. The first support mechanisms elastically abut against the bracket in the radial direction. A receiving cavity is formed between the first support mechanisms and the support base, and the optical unit is located in the receiving cavity. One end of the second support mechanism is elastically connected to the bracket, and the other end movably abuts against the optical unit.

[0005] In one possible implementation, the support includes: Central part; Multiple receiving portions are integrally formed on the outer periphery of the central portion, and the multiple receiving portions are spaced apart around the axis of the central portion, and the receiving portions are provided with receiving grooves; The first support mechanism is at least partially sandwiched between the adjacent receiving portion and the inner sheath, and the second support mechanism is provided between any two adjacent receiving portions, with one end of the second support mechanism away from the optical unit elastically connected to the center portion.

[0006] In one possible implementation, the first support mechanism includes: The first support member has one end rotatably connected to the support base; The second support member has one end rotatably connected to the other end of the first support member, and the first support member and the second support member are arranged at an angle, with the second support member at least partially covering the outer periphery of the receiving portion.

[0007] In one possible implementation, the first support mechanism further includes a first elastic element sandwiched between the receiving portion and the second support element.

[0008] In one possible implementation, the outer periphery of the receiving portion is provided with two receiving protrusions, which are spaced apart along the length direction of the receiving portion, and the two receiving protrusions cooperate with the receiving portion to form a movable cavity, and the second support member is at least partially movably disposed in the movable cavity.

[0009] In one possible implementation, along the radial direction of the inner sheath, one side of the support base abuts against the inner sheath, and the other side of the support base is provided with two support surfaces, which are inclined to each other, and both support surfaces are inclined to the adjacent first support member to form two receiving cavities.

[0010] In one possible implementation, the second support mechanism includes: A slider, one end of which is slidably connected to the central portion; Two third supports are rotatably connected to the end of the slider away from the center, and the two third supports respectively abut against the optical units in the two receiving cavities.

[0011] In one possible implementation, the second support mechanism further includes a second elastic member, one end of which is elastically connected to the central portion, and the other end of which is elastically connected to the sliding member, for driving the sliding member to move toward a side away from the central portion.

[0012] In one possible implementation, along the circumference of the inner sheath, extensions are provided on opposite sides of the support base. Two extensions are correspondingly provided with two first support mechanisms. The extensions are spaced apart on the side of their corresponding first support mechanism near the inner sheath, forming a filling space between the first support mechanism and the extensions. The filling space is filled with an elastic filler.

[0013] In one possible implementation, the outer protective assembly includes a metal sleeve, an armor layer, and an outer protective sleeve arranged sequentially from the inside out.

[0014] The three-core submarine cable of this application fixes multiple electrical units within multiple receiving slots of a support frame, ensuring that the relative positions of the electrical units remain constant, and the support frame enhances the pressure-resistant buffering protection of the electrical units. Furthermore, a first support mechanism is partially sandwiched between the support frame and the inner sheath, and the first support mechanism elastically abuts against the support frame in the radial direction, further improving the pressure-resistant buffering performance of the electrical units. A second support mechanism elastically supports the optical units, achieving pressure-resistant buffering protection for the optical units, thereby improving the overall pressure-resistant buffering performance of the three-core submarine cable. Attached Figure Description

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

[0016] Figure 2 for Figure 1 A partially enlarged schematic diagram of the three-core submarine cable.

[0017] Figure 3 This is a schematic diagram of the structure of the movable cavity in one embodiment of the three-core submarine cable of this application.

[0018] Figure 4 This is a schematic diagram of the installation of the sliding member in one embodiment of the three-core submarine cable of this application.

[0019] Key component symbols: 100, Three-core submarine cable; P1, Support surface; P2, Supporting surface; 10, Inner sheath; 11, Accommodation gap; 20, Outer sheath assembly; 21, Metal sheath; 22, Armor layer; 23, Outer sheath; 30, Electrical unit; 31, Conductor; 32, Shielding layer; 33, Insulation layer; 40, Optical unit; 41, Fiber core; 42, Stainless steel tube; 50, Support; 51, Accommodation groove; 52, Center part; 53, Connecting part; 54, Accommodation part; 55, Accommodation protrusion; 550, Movable cavity; 5 6. Accommodating opening; 57. Mounting protrusion; 570. Slide groove; 60. Support assembly; 61. Support base; 611. Extension; 612. First pivot; 613. Accommodating cavity; 62. First support mechanism; 621. First support member; 622. Second support member; 623. First elastic member; 624. Second pivot; 625. Filling space; 63. Second support mechanism; 631. Sliding member; 632. Third support member; 633. Third pivot; 634. Second elastic member; 70. Elastic filler.

[0020] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0025] like Figures 1 to 2 As shown, this embodiment provides a three-core submarine cable 100, including an electrical unit 30, an optical unit 40, an inner sheath 10, an outer sheath assembly 20, a bracket 50, and multiple support assemblies 60.

[0026] The inner sheath 10 is made of insulating material such as polyethylene, and is approximately an annular structure. The bracket 50 is located inside the inner sheath 10, and the axis of the bracket 50 coincides with the axis of the inner sheath 10. The bracket 50 has multiple receiving slots 51, which penetrate the bracket 50 along its axis. An electrical unit 30 is provided within each receiving slot 51. The shape and size of the electrical unit 30 are adapted to the receiving slot 51 so that the electrical unit 30 can be confined within the receiving slot 51. There are three electrical units 30, and correspondingly, there are three receiving slots 51.

[0027] Multiple support components 60 are correspondingly arranged with multiple electrical units 30, that is, the number of support components 60 is also set to three. A support component 60 is provided between any two adjacent electrical units 30 along the circumference of the inner sheath 10. The support component 60 includes a support base 61, two first support mechanisms 62, and a second support mechanism 63, along the circumference of the inner sheath 10. The two first support mechanisms 62 are rotatably connected to opposite sides of the support base 61, and the first support mechanisms 62 are at least partially sandwiched between the bracket 50 and the inner sheath 10, elastically abutting the bracket 50 radially. A receiving cavity 613 is formed between the first support mechanism 62 and the support base 61, and the optical unit 40 is located in the receiving cavity 613. One end of the second support mechanism 63 is elastically connected to the bracket 50, and its other end movably abuts against the optical unit 40.

[0028] Thus, the three-core submarine cable 100 of this application, by fixing multiple electrical units 30 within multiple receiving slots 51 of the support 50, ensures that the relative positions of the multiple electrical units 30 remain unchanged, and the support 50 enhances the pressure-resistant buffering protection of the electrical units 30. Furthermore, the first support mechanism 62 is partially sandwiched between the support 50 and the inner sheath 10, and the first support mechanism 62 elastically abuts against the support 50 in the radial direction, further improving the pressure-resistant buffering performance of the electrical units 30. The second support mechanism 63 elastically supports the optical unit 40, achieving pressure-resistant buffering protection for the optical unit 40, thereby improving the overall pressure-resistant buffering performance of the three-core submarine cable 100.

[0029] Please combine Figures 1 to 2 In one embodiment, the bracket 50 is made of an insulating material such as plastic, and the bracket 50 includes a central portion 52 and a plurality of receiving portions 54. The plurality of receiving portions 54 are integrally formed on the outer periphery of the central portion 52, and the plurality of receiving portions 54 are spaced apart around the axis of the central portion 52.

[0030] The central portion 52 is generally cylindrical, and a plurality of connecting portions 53 protrude from its outer peripheral surface. The number of connecting portions 53 is the same as the number of receiving portions 54, and the connecting portions 53 and receiving portions 54 are arranged in a one-to-one correspondence. The cross-sectional shape of the connecting portion 53 is generally an isosceles trapezoid. Along the radial direction of the central portion 52, one side of the connecting portion 53 is integrally formed on the outer peripheral surface of the central portion 52, and the other side of the connecting portion 53 is integrally formed on the side of the receiving portion 54 near the central portion 52. Furthermore, the outer diameter of the portion of the connecting portion 53 near the receiving portion 54 is larger than the outer diameter of the portion near the central portion 52.

[0031] In this embodiment, the receiving portion 54 is generally an annular structure, and each receiving portion 54 is provided with a receiving groove 51. The number of receiving portions 54 and connecting portions 53 is the same as the number of electrical units 30, that is, the number of receiving portions 54 and connecting portions 53 is also set to three.

[0032] Along the circumference of the inner sheath 10, any two adjacent receiving parts 54 and the corresponding area of ​​the inner sheath 10 are jointly arranged to form a receiving gap 11, and the three receiving parts 54 form a total of three receiving gaps 11, and each receiving gap 11 is provided with a support seat 61.

[0033] Along the radial direction of the inner sheath 10, one side of the support base 61 is arc-shaped and fits against the inner circumferential surface of the inner sheath 10. Along the circumferential direction of the inner sheath 10, each of the opposite sides of the support base 61 has an extension 611. Both extensions 611 and the support base 61 are integrally formed, and both can be made of materials such as plastic. The surfaces of the two extensions 611 closest to the inner sheath 10 are in contact with the surfaces of the support base 61 closest to the inner sheath 10 and together fit against the inner circumferential surface of the inner sheath 10.

[0034] In this embodiment, the extension 611 is spaced apart on the side of the corresponding first support mechanism 62 near the inner sheath 10, for forming a filling space 625 between the first support mechanism 62 and the extension 611, and the filling space 625 is filled with an elastic filler 70.

[0035] Two extensions 611 are correspondingly provided with two first support mechanisms 62, and the two extensions 611 and their corresponding first support mechanisms 62 are radially spaced apart in the inner sheath 10. Furthermore, along the circumference of the inner sheath 10, the circumferential length of the two extensions 611 and the support base 61 is less than the circumferential length of the receiving gap 11 in which they are located, so that the extensions 611, the first support mechanisms 62, the support base 61, and the inner sheath 10 together form a filling space 625, which is filled with an elastic filler 70. The elastic filler 70 can be made of an elastic material such as rubber, so that it provides elastic support between the first support mechanism 62 and the extensions 611. Thus, when an external force acts on the support base 61 through the inner sheath 10, it first acts radially on the corresponding elastic filler 70 through the two extensions 611. The buffered external force then acts on the first support mechanism 62, thereby reducing the external force transmitted to the first support mechanism 62 and preventing a large external force from directly acting on the electrical unit 30 through the first support mechanism 62. In addition, after the external force transmitted to the support base 61 is distributed by the elastic filler 70 on both sides, the external force exerted by the support base 61 on the optical unit 40 is also reduced accordingly, thus also protecting the optical unit 40.

[0036] Please combine Figures 1 to 3In one embodiment, the first support mechanism 62 includes a first support member 621 and a second support member 622. One end of the first support member 621 is rotatably connected to the support base 61, and one end of the second support member 622 is rotatably connected to the other end of the first support member 621. The first support member 621 and the second support member 622 are arranged at an angle, and the second support member 622 at least partially covers the outer periphery of the receiving portion 54.

[0037] Along the radial direction of the inner sheath 10, the thickness of the support base 61 is greater than the thickness of the extension 611, and the first support member 621 is rotatably connected to the portion of the support base 61 that extends beyond the extension 611. For example, along the circumferential direction of the inner sheath 10, the support base 61 has first rotating grooves on both opposite sides extending beyond the extension 611. The end of the first support member 621 away from the second support member 622 is rotatably disposed in the first rotating groove, and the first support member 621 can be rotatably connected to the support base 61 through a first rotating shaft 612, the axis of which is parallel to the axial direction of the inner sheath 10.

[0038] The first support member 621 may have a second rotating groove on the side away from the support base 61. One end of the second support member 622 is rotatably disposed in the second rotating groove, and the second support member 622 can be rotatably connected to the first support member 621 through the second rotating shaft 624. The axis of the second rotating shaft 624 is parallel to the axial direction of the inner sheath 10.

[0039] In this embodiment, the second support member 622 is generally curved, and the side of the second support member 622 facing the receiving portion 54 is recessed, so that the second support member 622 can at least partially conform to the outer peripheral surface of the receiving portion 54. In addition, the end of the second support member 622 away from the first support member 621 extends between the receiving portion 54 and the inner sheath 10.

[0040] The first support mechanism 62 also includes a first elastic element 623, which is sandwiched between the receiving portion 54 and the second support element 622. The first elastic element 623 can be a spring, with one end elastically connected to the inner sheath 10 and the other end elastically connected to the second support element 622, so that the first elastic element 623 always provides an elastic force to the second support element 622 to deflect towards one side of the inner sheath 10. In this way, when an external force acts on the second support element 622 through the inner sheath 10, the second support element 622 is elastically supported by the first elastic element 623 and plays a buffering role, and together with the receiving portion 54 covering the electrical unit 30, it achieves protection for the electrical unit 30. The number of first elastic elements 623 can be multiple, and multiple first elastic elements 623 are arranged sequentially at intervals along the axis of the receiving portion 54.

[0041] In this embodiment, two receiving protrusions 55 are provided on the outer periphery of the receiving portion 54, and the receiving protrusions 55 are generally annular. The two receiving protrusions 55 are spaced apart along the length direction of the receiving portion 54, and the two receiving protrusions 55 are located near the end faces of both ends of the receiving portion 54. The two receiving protrusions 55 cooperate with the receiving portion 54 to form a movable cavity 550, the movable cavity 550 is located between the two receiving protrusions 55, and the second support member 622 is at least partially movably disposed in the movable cavity 550, that is, the second support member 622 can move within the movable cavity 550 relative to the side of the receiving portion 54 facing the electrical unit 30 therein.

[0042] Furthermore, along the radial direction of the inner sheath 10, one side of the support base 61 abuts against the inner sheath 10, and the other side of the support base 61 is provided with two support surfaces P1. The two support surfaces P1 are inclined to each other, and both support surfaces P1 are inclined to the adjacent first support member 621 to form two receiving cavities 613. The surface of the first support member 621 away from its adjacent extension 611 is the abutment surface P2. The abutment surface P2 is an inclined plane, and the abutment surface P2 cooperates with the support surface P1 to form the receiving cavity 613. The shape of the receiving cavity 613 is approximately "V" shaped, so that the optical unit 40 is supported by the support surface P1 and the abutment surface P2.

[0043] Thus, when an external force is applied to the area of ​​the inner sheath 10 corresponding to the receiving portion 54, the second support member 622 moves inward within the movable cavity 550. The second support member 622 then causes the first support member 621 connected to it to deflect towards the extension portion 611. The elastic filler 70 buffers the swing of the first support member 621, allowing the first support mechanism 62 to be supported by both the first elastic member 623 and the elastic filler 70, with the two support methods providing opposite support forces, effectively buffering the impact of external forces. Simultaneously, when the first support member 621 deflects towards the extension portion 611, the optical unit 40 can slide along the support surface P1 towards the first support member 621, thus preventing the receiving portion 54 from squeezing the optical unit 40 when it is forced to move inward under pressure.

[0044] It is worth noting that by setting the shapes of the first support member 621 and the second support member 622 and the angle between them, it can be ensured that when the second support member 622 is moved by the external force at the inner sheath 10 in direct contact with it, the first support member 621 deflects toward the side of the extension 611.

[0045] In this embodiment, the receiving protrusion 55 is an open structure, and the receiving protrusion 55 is provided with a receiving opening 56 on one side of its area near the adjacent inner sheath 10. The receiving opening 56 is connected to the movable cavity 550, so that the first elastic member 623 can be installed in the space corresponding to the receiving opening 56. The first elastic member 623 can be connected to the receiving part 54 exposed on the outer peripheral surface of the area of ​​the receiving protrusion 55, avoiding the need to place the first elastic member 623 on the outer peripheral surface of the receiving protrusion 55, which would result in an excessively large outer diameter.

[0046] In this embodiment, the two second support members 622 on both sides of the receiving portion 54 extend to the receiving opening 56, so that when the inner sheath 10 corresponding to the receiving opening 56 is impacted by an external force, the external force can be dispersed through the two second support members 622, thereby further improving the impact resistance.

[0047] Please combine Figures 1 to 4 In one embodiment, a second support mechanism 63 is provided between any two adjacent receiving portions 54, and the end of the second support mechanism 63 away from the optical unit 40 is elastically connected to the central portion 52. That is, a second support mechanism 63 is provided in each receiving gap 11.

[0048] The second support mechanism 63 includes a slider 631 and two third support members 632. One end of the slider 631 is slidably connected to the central portion 52, and the two third support members 632 are rotatably connected to the end of the slider 631 away from the central portion 52, and the two third support members 632 respectively abut against the optical units 40 in the two receiving cavities 613.

[0049] The outer peripheral surface of the central portion 52 is provided with a plurality of mounting protrusions 57, the number of which is the same as the number of electrical units 30, i.e., three mounting protrusions 57. The three mounting protrusions 57 and three connecting portions 53 are alternately arranged around the central portion 52. A groove 570 is formed at the end of each mounting protrusion 57 away from the central portion 52, and the extending direction of the groove 570 is parallel to the radial direction of the central portion 52. One end of a sliding member 631 is slidably disposed within the groove 570 to guide the sliding member 631 through the mounting protrusions 57.

[0050] In this embodiment, the second support mechanism 63 further includes a second elastic element 634. One end of the second elastic element 634 is elastically connected to the central portion 52, and the other end is elastically connected to the sliding element 631, for driving the sliding element 631 to move away from the central portion 52. The second elastic element 634 can be a spring, and it is located within the slide groove 570. One end of the second elastic element 634 is elastically connected to the sliding element 631, and the other end is elastically connected to the bottom wall of the slide groove 570, so as to provide elastic force to the sliding element 631 through the second elastic element 634, thereby realizing radial buffering of the optical unit 40. In addition, the sliding element 631 can be slightly deflected relative to the central portion 52 by the second elastic element 634. The number of second elastic elements 634 can be multiple, and multiple second elastic elements 634 are arranged sequentially at intervals along the axis of the central portion 52.

[0051] One end of each of the two third support members 632 can be rotatably connected to the end of the slider 631 away from the center portion 52 via a third pivot 633. The other end of each of the two third support members 632 is provided with an arc-shaped portion, which can increase the contact area between the third support member 632 and the optical unit 40. In addition, a torsion spring can be provided at the third pivot 633 to provide an elastic force to the third support member 632, thereby providing an elastic force that deflects the third support member 632 toward the optical unit 40 at all times, so as to ensure that the third support member 632 can always hold the optical unit 40 tightly.

[0052] Thus, when the area of ​​the inner sheath 10 corresponding to the support base 61 is subjected to external force, the support base 61 abuts against the optical unit 40, while the third support member 632 elastically supports the optical unit 40, thereby achieving radial buffering of the optical unit 40. In addition, weight-reducing holes may be provided on the support base 61 to reduce the weight of the support base 61.

[0053] Please combine Figure 1 In one embodiment, the electrical unit 30 includes a conductor 31, a shielding layer 32, and an insulating layer 33 arranged sequentially from the inside out. The conductor 31 may be made of conductive materials such as copper, the shielding layer 32 may be made of semi-conductive shielding tape, and the insulating layer 33 may be made of cross-linked polyethylene.

[0054] The optical unit 40 includes multiple fiber cores 41 and a stainless steel tube 42. The multiple fiber cores 41 are inserted into the stainless steel tube 42, and the stainless steel tube 42 is filled with fiber grease. The optical unit 40 can be used for signal transmission, such as detecting temperature or strain.

[0055] It is worth noting that the specific number and structure of the electrical unit 30 and the optical unit 40 can be designed according to actual needs and are not limited to the above.

[0056] In this embodiment, the outer protective assembly 20 includes a metal sleeve 21, an armor layer 22, and an outer sheath 23 arranged sequentially from the inside to the outside. The metal sleeve 21 can be a tube made of metal materials such as corrugated copper sleeve, the armor layer 22 can be formed by twisting together wires such as galvanized steel wire, and the outer sheath 23 can be made of a wear-resistant and seawater corrosion-resistant polymer material.

[0057] In addition, the outer protective component 20 may also include other layered structures such as a water-blocking layer, an electromagnetic shielding layer, and a foaming layer, and the specific composition of its layered structure can be selected according to actual needs.

[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 three-core submarine cable, comprising an electrical unit, an optical unit, an inner sheath, and an outer sheath assembly; characterized in that, The three-core submarine cable also includes: A bracket is located inside the inner sheath, and the bracket is provided with multiple receiving slots, in which the electrical unit is disposed; Multiple support components are provided, corresponding to multiple electrical units, and one support component is provided between any two adjacent electrical units along the circumference of the inner sheath; The support assembly includes a support base, two first support mechanisms, and a second support mechanism. Along the circumference of the inner sheath, the two first support mechanisms are rotatably connected to opposite sides of the support base, and the first support mechanisms are at least partially sandwiched between the bracket and the inner sheath. The first support mechanisms elastically abut against the bracket in the radial direction. A receiving cavity is formed between the first support mechanisms and the support base, and the optical unit is located in the receiving cavity. One end of the second support mechanism is elastically connected to the bracket, and the other end movably abuts against the optical unit.

2. The three-core submarine cable as described in claim 1, characterized in that, The support includes: Central part; Multiple receiving portions are integrally formed on the outer periphery of the central portion, and the multiple receiving portions are spaced apart around the axis of the central portion, and the receiving portions are provided with receiving grooves; The first support mechanism is at least partially sandwiched between the adjacent receiving portion and the inner sheath, and the second support mechanism is provided between any two adjacent receiving portions, with one end of the second support mechanism away from the optical unit elastically connected to the center portion.

3. The three-core submarine cable as described in claim 2, characterized in that, The first support mechanism includes: The first support member has one end rotatably connected to the support base; The second support member has one end rotatably connected to the other end of the first support member, and the first support member and the second support member are arranged at an angle, with the second support member at least partially covering the outer periphery of the receiving portion.

4. The three-core submarine cable as described in claim 3, characterized in that, The first support mechanism further includes a first elastic element, which is sandwiched between the receiving portion and the second support element.

5. The three-core submarine cable as described in claim 4, characterized in that, Two receiving protrusions are provided on the outer periphery of the receiving part. The two receiving protrusions are spaced apart along the length direction of the receiving part, and the two receiving protrusions cooperate with the receiving part to form a movable cavity. The second support member is at least partially movably disposed in the movable cavity.

6. The three-core submarine cable as described in claim 3, characterized in that, Along the radial direction of the inner sheath, one side of the support base abuts against the inner sheath, and the other side of the support base is provided with two support surfaces. The two support surfaces are inclined to each other, and both support surfaces are inclined to the adjacent first support member to form two receiving cavities.

7. The three-core submarine cable as described in claim 6, characterized in that, The second support mechanism includes: A slider, one end of which is slidably connected to the central portion; Two third supports are rotatably connected to the end of the slider away from the center, and the two third supports respectively abut against the optical units in the two receiving cavities.

8. The three-core submarine cable as described in claim 7, characterized in that, The second support mechanism further includes a second elastic element, one end of which is elastically connected to the central portion, and the other end of which is elastically connected to the sliding element, for driving the sliding element to move away from the central portion.

9. The three-core submarine cable as described in claim 1, characterized in that, Along the circumference of the inner sheath, the support base has extensions on opposite sides. Two extensions are provided corresponding to two first support mechanisms. The extensions are spaced apart on the side of their corresponding first support mechanism near the inner sheath, forming a filling space between the first support mechanism and the extension. The filling space is filled with an elastic filler.

10. The three-core submarine cable as described in claim 1, characterized in that, The outer protective assembly includes a metal sleeve, an armor layer, and an outer protective sleeve arranged sequentially from the inside out.

Images