Filling strip applied to submarine cable and submarine cable

Abstract

The utility model relates to the technical field of submarine cables, and provides a filling strip applied to a submarine cable and the submarine cable. The filling strip comprises a first supporting section, a second supporting section, an attaching section, a first reinforcing section and a second reinforcing section. The two ends of the attaching section are connected with the first supporting section and the second supporting section respectively, and one end of the first supporting section and one end of the second supporting section are oppositely arranged and abut against each other; one end of the first reinforcing section is connected with the fitting section, and the other end of the first reinforcing section is connected with the abutting end of the first supporting section; one end of the second reinforcing section is connected with the fitting section, and the other end of the second reinforcing section is connected with the abutting end of the second supporting section; the first reinforcing section, the second reinforcing section and the attaching section define an accommodating cavity for accommodating an optical fiber unit, the area, located at the abutting end of the first supporting section and the abutting end of the second supporting section, of the accommodating cavity can be opened and closed, and the first supporting section, the second supporting section and the attaching section are all arc-shaped sections. According to the utility model, the roundness of the submarine cable is improved, and reliable protection of the optical fiber unit is realized.

Description

Technical Field

[0001] This utility model relates to the field of submarine cable technology, and in particular to a filler strip for use in submarine cables and a submarine cable. Background Technology

[0002] With the development of the marine power industry, the demand for submarine cables has increased dramatically. Filler strips are an important structural component of submarine cables, used to fill the space between the cable core and the sheath, and to secure the optical fiber units. Currently, filler strips in submarine cables often have openings facing either the cable core or the sheath. During the manufacturing and construction of submarine cables, the filler strips cannot provide complete protection for the optical fiber units, making them susceptible to mechanical damage. Utility Model Content

[0003] This invention provides a filler strip for use in submarine cables and a submarine cable, in order to solve the problem that the filler strip in the prior art cannot provide complete protection for the optical fiber unit and is prone to causing mechanical damage to the optical fiber unit.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows:

[0005] In a first aspect, this utility model provides a filler strip for use in submarine cables, comprising: a first support section, a second support section, an adhesive section, a first reinforcing section, and a second reinforcing section;

[0006] The two ends of the bonding section are respectively connected to the first support section and the second support section, and the end of the first support section opposite to the bonding section is disposed opposite to and abuts against the end of the second support section opposite to the bonding section;

[0007] One end of the first reinforcing section is connected to the fitting section, and the other end is connected to the abutting end of the first supporting section; one end of the second reinforcing section is connected to the fitting section, and the other end is connected to the abutting end of the second supporting section.

[0008] The first reinforcing section, the second reinforcing section, and the bonding section form a receiving cavity for accommodating the optical fiber unit. The area of ​​the receiving cavity located at the abutting end of the first support section and the abutting end of the second support section can be opened and closed.

[0009] The first support segment, the second support segment, and the fitting segment are all arc-shaped segments.

[0010] According to the present invention, a filler strip for use in submarine cables is provided, wherein the cross-section of the filler strip is an axisymmetric shape, and the arc-shaped segments of the first support segment and the second support segment are symmetrically arranged along the axis of symmetry of the filler strip.

[0011] According to the present invention, a filler strip for use in submarine cables is provided, wherein the arc-shaped segment of the bonding section includes a first arc-shaped unit and a second arc-shaped unit;

[0012] The first arc-shaped unit and the second arc-shaped unit are connected at the bottom of the accommodating cavity;

[0013] The first arc-shaped unit and the second arc-shaped unit are oriented towards different cable cores.

[0014] According to the present invention, a filler strip for use in submarine cables is provided, wherein both the first reinforcing section and the second reinforcing section are arc-shaped sections;

[0015] The first reinforcing segment is smoothly connected to the first arc-shaped unit, and the second reinforcing segment is smoothly connected to the second arc-shaped unit.

[0016] According to the present invention, a filler strip for use in submarine cables has a bending radius at the end of the first reinforcing section and the second reinforcing section near the bonding section that is greater than the bending radius at the end near the abutting section.

[0017] According to the present invention, a filling strip for use in submarine cables has an accommodating cavity area that is 1.15 to 1.25 times the cross-sectional area of ​​the optical fiber unit.

[0018] According to the present invention, a filler strip for use in submarine cables is provided, wherein at least one first support rod is provided in the region of the first support section and the bonding section opposite to the first reinforcing section;

[0019] And / or, the area of ​​the second support section and the fitting section opposite to the second reinforcing section is provided with at least one second support rod.

[0020] According to the present invention, a filler strip for use in submarine cables is provided, wherein the filler strip is an integral structure.

[0021] According to the present invention, a filler strip for use in submarine cables is provided, wherein the first support section, the second support section, the bonding section, the first reinforcing section and the second reinforcing section are all foamed components.

[0022] Secondly, this utility model provides a submarine cable, comprising: a cable core, an optical fiber unit, an armor layer, a sheath, and a filler strip as described above;

[0023] The cable core and the filler strip are disposed within the armor layer, the optical fiber unit is disposed in the receiving cavity of the filler strip, and the sheath is disposed within the armor layer.

[0024] The filler strip and submarine cable provided by this utility model are configured with a first support section, a second support section, a bonding section, a first reinforcing section, and a second reinforcing section. The arc-shaped arrangement of the first and second support sections conforms to the overall outer diameter of the submarine cable, and the arc-shaped arrangement of the bonding section conforms to the outer diameter of the cable core, thereby improving the roundness of the submarine cable. Furthermore, the first reinforcing section, the second reinforcing section, and the bonding section form an openable and closable cavity that completely encloses the optical fiber unit, providing a safe and reliable placement area for the optical fiber unit and achieving reliable protection for the optical fiber unit. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the filler strip provided by this utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the submarine cable provided by this utility model.

[0028] Figure label:

[0029] 1. Filler strip; 11. First support section; 12. Second support section; 13. Adhesive section; 14. First reinforcing section; 15. Second reinforcing section; 131. First arc-shaped unit; 132. Second arc-shaped unit;

[0030] 2. Cable core; 3. Fiber optic unit; 4. Armor layer; 5. Sheath. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] The following is combined with Figures 1 to 2 The present invention will provide a detailed description of the filler strip and submarine cable provided in the embodiments of the present invention through specific implementation methods and application scenarios.

[0033] Firstly, such as Figure 1 and Figure 2 As shown, this embodiment provides a filler strip for use in submarine cables, including: a first support section 11, a second support section 12, an adhesive section 13, a first reinforcing section 14, and a second reinforcing section 15.

[0034] The two ends of the bonding section 13 are connected to the first support section 11 and the second support section 12 respectively. The end of the first support section 11 facing away from the bonding section 13 and the end of the second support section 12 facing away from the bonding section 13 are respectively arranged opposite to and abut against each other.

[0035] One end of the first reinforcing section 14 is connected to the fitting section 13, and the other end is connected to the abutting end of the first supporting section 11; one end of the second reinforcing section 15 is connected to the fitting section 13, and the other end is connected to the abutting end of the second supporting section 12.

[0036] The first reinforcing section 14, the second reinforcing section 15, and the bonding section 13 form a cavity for accommodating the optical fiber unit 3. The cavity is located in the area between the abutting end of the first support section 11 and the abutting end of the second support section 12 and can be opened and closed.

[0037] The first support segment 11, the second support segment 12, and the fitting segment 13 are all arc-shaped segments.

[0038] Understandably, in a submarine cable, the cable core 2 is located near the center of the submarine cable's cross-section. The first support section 11 and the second support section 12 face towards the side closest to the outer diameter of the cross-section, while the fitting section 13 faces towards the side of the cable core 2. The first support section 11 and the second support section 12 are used to support the inner side of the sheath 5 of the submarine cable. Since the first support section 11 and the second support section 12 are arc-shaped, they can fit the overall outer diameter of the submarine cable. The fitting section 13 is used to support the outer wall of the cable core 2. Since the fitting section 13 is arc-shaped, it can fit the outer diameter of the cable core 2.

[0039] Specifically, since the number of cable cores 2 can be one or more, the shape of the bonding section 13 varies depending on the number of cable cores 2, allowing for bonding of different numbers of cable cores 2. That is, for submarine cables with different numbers of cable cores 2, the bonding section 13 has different structural configurations.

[0040] The first reinforcing section 14 and the second reinforcing section 15, together with the bonding section 13, form a cavity to house the optical fiber unit 3. Since the abutting ends of the first supporting section 11 and the second supporting section 12 can be opened and closed, tools can be used to open the abutting ends of the first supporting section 11 and the second supporting section 12 during installation, allowing for convenient insertion of the optical fiber unit 3. After the optical fiber unit 3 is installed, the abutting ends of the first supporting section 11 and the second supporting section 12 are restored, closing the cavity and providing a fully enclosed enclosure for the optical fiber unit 3. This prevents the optical fiber unit 3 from contacting other structures within the submarine cable, thus avoiding physical damage to the optical fiber unit 3 from other structures.

[0041] The filler strip 1 provided by this utility model for use in submarine cables, by setting a first support section 11, a second support section 12, a bonding section 13, a first reinforcing section 14, and a second reinforcing section 15, the arc-shaped arrangement of the first support section 11 and the second support section 12 conforms to the overall outer diameter of the submarine cable, and the arc-shaped arrangement of the bonding section 13 conforms to the outer diameter of the cable core 2, thereby improving the roundness of the submarine cable. Furthermore, the first reinforcing section 14, the second reinforcing section 15, and the bonding section 13 form an openable and closable accommodating cavity, which fully encloses the optical fiber unit 3, providing a safe and reliable placement area for the optical fiber unit 3 and achieving reliable protection for the optical fiber unit 3.

[0042] like Figure 1 As shown, the cross-section of the filler strip 1 in this embodiment is an axisymmetric figure, and the arc-shaped segments of the first support segment 11 and the second support segment 12 are symmetrically arranged along the axis of symmetry of the filler strip 1.

[0043] Understandably, the cross-section of filler strip 1 is an axisymmetric shape. Given that the entire submarine cable is an axisymmetric shape, the symmetry of filler strip 1 is more conducive to its placement within the submarine cable. The first support segment 11 and the second support segment 12 are also symmetrically arranged, which allows for better control of the roundness of the inner wall of the submarine cable when the first support segment 11 and the second support segment 12 are in contact with it, and is more conducive to the orderly processing of the submarine cable.

[0044] like Figure 1 As shown, the arc segment of the fitting segment 13 in this embodiment includes a first arc segment 131 and a second arc segment 132.

[0045] The first arc-shaped unit 131 and the second arc-shaped unit 132 are connected at the bottom of the accommodating cavity.

[0046] The first arc-shaped unit 131 and the second arc-shaped unit 132 are oriented towards different cable cores 2.

[0047] Understandably, when the submarine cable is a three-core cable, i.e., there are three cable cores 2, the bonding section 13 needs to be bonded to two adjacent cable cores 2 simultaneously. To accommodate the two cable cores 2 in different directions, the curved section of the bonding section 13 has two bending directions. Therefore, the curved section of the bonding section 13 includes a first curved unit 131 and a second curved unit 132, which are smoothly connected at the joint.

[0048] like Figure 1 As shown, in this embodiment, both the first reinforcing segment 14 and the second reinforcing segment 15 are arc-shaped segments.

[0049] The first reinforcing section 14 is smoothly connected to the first arc-shaped unit 131, and the second reinforcing section 15 is smoothly connected to the second arc-shaped unit 132.

[0050] Understandably, the first reinforcing segment 14 and the second reinforcing segment 15 are also arc-shaped segments. The first reinforcing segment 14, the first arc-shaped unit 131, the second reinforcing segment 15, and the second arc-shaped unit 132 can all be smoothly connected to form an arc-shaped accommodating cavity. The optical fiber unit 3 is placed inside the arc-shaped accommodating cavity, ensuring smooth contact between the outer wall of the optical fiber unit 3 and the accommodating cavity, thus better protecting the outer wall of the optical fiber unit 3.

[0051] like Figure 1 As shown, in this embodiment, the bending radius of the first reinforcing section 14 and the second reinforcing section 15 near the fitting section 13 is greater than the bending radius near the abutting end.

[0052] Understandably, since the abutment ends of the first support segment 11 and the second support segment 12 can open and close, the optical fiber unit 3 installed in the accommodating cavity needs to be as far away from the abutment ends as possible. The ends of the first reinforcing segment 14 and the second reinforcing segment 15 closest to the bonding segment 13 are furthest from the abutment ends in the accommodating cavity. Setting the bending radius at this point to be larger than the bending radius at the abutment ends makes it easier for the optical fiber unit 3 to be placed close to the bonding segment 13, ensuring the stability of the optical fiber unit 3 within the accommodating cavity.

[0053] like Figure 1 As shown, the area of ​​the accommodating cavity in this embodiment is 1.15 to 1.25 times the cross-sectional area of ​​the optical fiber unit 3.

[0054] Understandably, the area of ​​the accommodating cavity in this embodiment is slightly larger than the cross-sectional area of ​​the optical fiber unit 3, which can better cover the optical fiber unit 3 completely. Furthermore, the optical fiber unit 3 can be slightly adjusted in position within the accommodating cavity, so that the optical fiber unit 3 can be better protected from mechanical damage.

[0055] Specifically, the area of ​​the accommodating cavity can be 1.15 times, 1.2 times, or 1.25 times the cross-sectional area of ​​the fiber unit 3.

[0056] In this embodiment, at least one first support rod is provided in the area of ​​the first support section 11 and the fitting section 13 away from the first reinforcing section 14.

[0057] Understandably, in order to enhance the overall strength and stability of the filler strip 1, a first support rod is provided between the first support section 11 and the bonding section 13 in this embodiment. Specifically, there may be one or more first support rods, with multiple first support rods arranged in parallel.

[0058] In this embodiment, at least one second support rod is provided in the area of ​​the second support section 12 and the fitting section 13 that is away from the second reinforcing section 15.

[0059] Understandably, in order to enhance the overall strength and stability of the filler strip 1, a second support rod is provided between the second support section 12 and the bonding section 13 in this embodiment. Specifically, there can be one or more second support rods, with multiple second support rods arranged in parallel.

[0060] In an optional embodiment, multiple first support rods and multiple second support rods can be provided simultaneously, with the multiple first support rods arranged in parallel and the multiple second support rods arranged in parallel.

[0061] like Figure 1 As shown, the filler strip 1 in this embodiment is an integral structure.

[0062] It is understood that the first support section 11, the second support section 12, the bonding section 13, the first reinforcing section 14 and the second reinforcing section 15 in this embodiment are an integral structure, which is formed in one step by extrusion through a mold.

[0063] The integrated structure eliminates the gaps between multiple components, resulting in higher overall strength. The hollow portion of the integrated structure reduces the weight of the filler strip 1, thereby reducing the weight of the submarine cable. Furthermore, the integrated structure is easier to manufacture, eliminating the need for additional assembly and improving assembly efficiency and precision.

[0064] like Figure 1 As shown, in this embodiment, the first support section 11, the second support section 12, the bonding section 13, the first reinforcing section 14, and the second reinforcing section 15 are all foamed parts.

[0065] Understandably, the foamed component is made by crushing scrap sheath material 5 and adding a foaming agent, achieving a foaming rate of over 80%. The foamed component is lightweight, providing buoyancy during submarine cable laying and reducing the number of buoyancy blocks required. Furthermore, by reusing the scrap sheath material 5, waste materials are reused, reducing the production cost of submarine cables.

[0066] Secondly, such as Figure 2 As shown, this embodiment provides a submarine cable, including: cable core 2, optical fiber unit 3, armor layer 4, sheath 5, and filler strip 1 as described above.

[0067] The cable core 2 and the filler strip 1 are located inside the armor layer 4, the optical fiber unit 3 is located in the cavity of the filler strip 1, and the sheath 5 is fitted inside the armor layer 4.

[0068] Specifically, since the submarine cable includes a filler strip 1, and the specific structure of the filler strip 1 is as described in the above embodiments, the submarine cable shown in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects achieved by all the technical solutions of the above embodiments, which will not be described in detail here.

[0069] Understandably, when assembling submarine cables, the cable cores 2 are first arranged according to the preset structure, then the filler strips 1 are filled into the holes of the cable cores 2, the optical fiber units 3 are installed into the filler strips 1, the armor layer 4 is installed, and finally the sheath 5 is installed on the outside of the armor layer 4.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A filler strip for use in submarine cables, characterized in that, include: First support section, second support section, fitting section, first reinforcing section and second reinforcing section; The two ends of the bonding section are respectively connected to the first support section and the second support section, and the end of the first support section opposite to the bonding section is disposed opposite to and abuts against the end of the second support section opposite to the bonding section; One end of the first reinforcing section is connected to the fitting section, and the other end is connected to the abutting end of the first supporting section; one end of the second reinforcing section is connected to the fitting section, and the other end is connected to the abutting end of the second supporting section. The first reinforcing section, the second reinforcing section, and the bonding section form a receiving cavity for accommodating the optical fiber unit. The area of ​​the receiving cavity located at the abutting end of the first support section and the abutting end of the second support section can be opened and closed. The first support segment, the second support segment, and the fitting segment are all arc-shaped segments.

2. The filler strip for use in submarine cables according to claim 1, characterized in that, The cross-section of the filler strip is an axisymmetric shape, and the arc-shaped segments of the first support segment and the second support segment are symmetrically arranged along the axis of symmetry of the filler strip.

3. The filler strip for use in submarine cables according to claim 1, characterized in that, The arc-shaped segment of the bonding section includes a first arc-shaped unit and a second arc-shaped unit; The first arc-shaped unit and the second arc-shaped unit are connected at the bottom of the accommodating cavity; The first arc-shaped unit and the second arc-shaped unit are oriented towards different cable cores.

4. The filler strip for use in submarine cables according to claim 3, characterized in that, Both the first reinforcing segment and the second reinforcing segment are arc-shaped segments; The first reinforcing segment is smoothly connected to the first arc-shaped unit, and the second reinforcing segment is smoothly connected to the second arc-shaped unit.

5. The filler strip for use in submarine cables according to claim 4, characterized in that, The bending radius of the first reinforcing section and the second reinforcing section near the fitting section is greater than the bending radius near the abutting end.

6. The filler strip for use in submarine cables according to claim 1, characterized in that, The area of ​​the accommodating cavity is 1.15 to 1.25 times the cross-sectional area of ​​the optical fiber unit.

7. The filler strip for use in submarine cables according to claim 1, characterized in that, At least one first support rod is provided in the area of ​​the first support section and the fitting section opposite to the first reinforcing section; And / or, the area of ​​the second support section and the fitting section opposite to the second reinforcing section is provided with at least one second support rod.

8. The filler strip for use in submarine cables according to claim 1, characterized in that, The filler strip is a one-piece structure.

9. The filler strip for use in submarine cables according to claim 1, characterized in that, The first support section, the second support section, the bonding section, the first reinforcing section, and the second reinforcing section are all foamed components.

10. A submarine cable, characterized in that, include: Cable core, optical fiber unit, armor layer, sheath, and filler strip as described in any one of claims 1 to 9; The cable core and the filler strip are disposed within the armor layer, the optical fiber unit is disposed in the receiving cavity of the filler strip, and the sheath is disposed within the armor layer.

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