Submarine cable

Abstract

The utility model relates to the technical field of marine cables, in particular to a submarine cable. The submarine cable comprises a cable unit, an outer protection unit and at least one diversion line. The cable unit is arranged in the outer protection unit, the cable unit comprises a plurality of core wires and a plurality of optical fibers, the plurality of core wires and the plurality of optical fibers are arranged around the axis of the outer protection unit in an annular array mode, and one optical fiber is arranged between every two adjacent core wires; and the diversion wire is arranged in the outer protection unit and is used for being electrically connected with a ground wire. According to the submarine cable, the diversion wire connected with the ground wire is arranged, and when the core wire breaks down, the diversion wire is used as a short circuit channel, so that the safety of circuit operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of submarine cables, and more particularly, to a submarine cable. Background Art

[0002] A submarine cable is a wire wrapped with insulating material, laid under the seabed and underwater of rivers, and used for telecommunication transmission. Modern submarine cables all use optical fibers as materials to transmit telephone and Internet signals. Submarine communication cables are mainly used for communication services. Although the cost is high, the confidentiality level is high. Submarine power cables are mainly used for underwater transmission of high-power electric energy, which is equivalent to the function of underground power cables, except that the application scenarios and laying methods are different. Since submarine cable projects are recognized by countries around the world as complex and difficult large-scale projects, from environmental exploration, marine physical surveys to cable design, manufacturing and installation.

[0003] However, the submarine cables in the prior art are prone to short-circuit problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a submarine optical cable, which can set a diversion line connected to the ground wire, and when a core wire fails, the diversion line is used as a short-circuit channel to improve the safety of circuit operation.

[0005] The embodiments of the utility model are implemented as follows:

[0006] The utility model provides a submarine cable, including:

[0007] An outer protection unit;

[0008] A cable unit, the cable unit is arranged inside the outer protection unit, the cable unit includes a plurality of core wires and a plurality of optical fibers, the plurality of core wires and the plurality of optical fibers are both arranged in a circular array around the axis of the outer protection unit, and one optical fiber is arranged between every two adjacent core wires; and

[0009] At least one diversion line, the diversion line is arranged inside the outer protection unit, and the diversion line is used for electrically connecting to the ground wire.

[0010] In an optional embodiment, the plurality of core wires enclose a central gap, and the diversion line is located inside the central gap.

[0011] In an optional embodiment, the diversion line abuts against one or more core wires.

[0012] In an optional embodiment, the submarine cable further includes a bracket, the bracket is located in the central gap, the bracket abuts against the plurality of core wires; the bracket is provided with a through hole, and the through hole cooperates with the diversion line.

[0013] In an optional embodiment, the adjacent two core wires and the outer protection unit enclose a peripheral gap, and the diversion line is located inside the peripheral gap.

[0014] In an alternative embodiment, the current-carrying wire is in contact with the core wire, and the inner wall area of the outer protection unit is in contact; or, the current-carrying wire is in contact with two adjacent core wires.

[0015] In an alternative embodiment, the current-carrying wire includes a first conductor and a sheath, the sheath wraps the first conductor, and the outer peripheral surface of the sheath is wavy.

[0016] In an alternative embodiment, the core wire includes a second conductor, an alloy aluminum sheath, a hot melt adhesive layer, and a PE sheath. The alloy aluminum sheath wraps the second conductor, and the hot melt adhesive layer is disposed between the alloy aluminum sheath and the PE sheath.

[0017] In an alternative embodiment, the thickness of the hot melt adhesive layer is 0.2 mm - 0.3 mm.

[0018] In an alternative embodiment, the outer protection unit includes a lining layer wrapped around the cable unit, an armor layer wrapped around the lining layer, and a protective layer wrapped around the armor layer. The armor layer is used for electrically connecting to the ground wire.

[0019] The beneficial effects of the embodiments of the present utility model include:

[0020] The submarine cable includes a cable unit, an outer protection unit, and at least one current-carrying wire; the cable unit is disposed within the outer protection unit, the cable unit includes a plurality of core wires and a plurality of optical fibers, the plurality of core wires and the plurality of optical fibers are both arranged in a circular array around the axis of the outer protection unit, and one optical fiber is disposed between every two adjacent core wires; the current-carrying wire is disposed within the outer protection unit, and the current-carrying wire is used for electrically connecting to the ground wire.

[0021] By providing a current-carrying wire connected to the ground wire, when a fault occurs in the core wire, the current-carrying wire is used as a short-circuit path to improve the safety of the circuit operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a cross-sectional view of the submarine cable provided by the embodiments of the present utility model;

[0024] Figure 2 It is a cross-sectional view of the submarine cable provided by other embodiments of the present utility model;

[0025] Figure 3Cross-sectional view of the submarine cable provided by other embodiments of the present utility model;

[0026] Figure 4 Cross-sectional view of the submarine cable provided by other embodiments of the present utility model;

[0027] Figure 5 is Figure 4 partial enlarged view of location A in

[0028] Icon: 100 - submarine cable; 110 - cable unit; 111 - core wire; 112 - optical fiber; 113 - second conductor; 114 - alloy aluminum sheath; 115 - hot melt adhesive layer; 116 - PE sheath; 117 - binding tape; 118 - first shielding layer; 119 - insulating layer; 121 - second shielding layer; 122 - water blocking tape; 123 - coated adhesive tape; 130 - outer protection unit; 131 - inner lining layer; 132 - armor layer; 133 - protection layer; 140 - diversion wire; 141 - first conductor; 142 - sheath; 150 - bracket; 151 - through hole; 160 - filling strip; 170 - steel strand; 180 - central gap; 190 - peripheral gap. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0031] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for differential description and cannot be construed as indicating or implying relative importance.

[0033] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0034] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] Please refer to Figures 1-4 , Figure 1 is a cross-sectional view of the submarine cable 100 provided by an embodiment of the present utility model; Figure 2 is a cross-sectional view of the submarine cable 100 provided by other embodiments of the present utility model; Figure 3 is a cross-sectional view of the submarine cable 100 provided by other embodiments of the present utility model; Figure 4 is a cross-sectional view of the submarine cable 100 provided by other embodiments of the present utility model; Figure 5 is Figure 4 a partial enlarged view of part A in Figures 1-4 The cross-sectional directions of

[0036] The submarine cable 100 includes a cable unit 110, an outer protection unit 130, and at least one diversion line 140; the cable unit 110 is disposed within the outer protection unit 130, the cable unit 110 includes a plurality of core wires 111 and a plurality of optical fibers 112, the plurality of core wires 111 and the plurality of optical fibers 112 are both arranged in a circular array around the axis of the outer protection unit, and one optical fiber 112 is disposed between every two adjacent core wires 111; the diversion line 140 is disposed within the outer protection unit 130, and the diversion line 140 is used for electrically connecting to a ground wire.

[0037] The working principle of the submarine cable 100 is as follows:

[0038] The submarine cable 100 transmits electricity by setting the core wires 111. In the case where a core wire 111 fails, since the diversion line 140 is electrically connected to the ground wire, the diversion line 140 can be used as a short - circuit path to improve the safety of the circuit operation.

[0039] Further, please refer to Figure 1 , the plurality of core wires 111 enclose a central gap 180, and the diversion line 140 is located within the central gap 180. Specifically, in this embodiment, three core wires 111 are provided. It can be understood that the three core wires 111 are of a circular structure. Thus, when the three core wires 111 are arranged in a circumferential array, that is, in a triangular structure arrangement, a central gap 180 will be formed. This embodiment is provided with one diversion line 140 and the diversion line 140 is disposed within the central gap 180. Thus, when assembling the submarine cable 100, it is convenient to twist the diversion line 140, the core wires 111, and the optical fibers 112 into one body.

[0040] According to the above settings, in other embodiments, the plurality of diversion lines 140 are connected in sequence, so that each diversion line 140 abuts against one or more core wires 111, or the diversion lines 140 located within the central gap 180 are all spaced from the core wires 111. Specifically, in this embodiment, the submarine cable 100 is provided with one diversion line 140, and the diversion line 140 abuts against the three core wires 111, thereby supporting and positioning the core wires 111. It can be understood that since both the core wires 111 and the diversion line 140 are of a circular structure and the diversion line 140 abuts against the outer circumferential surfaces of the three core wires 111, the plurality of core wires 111 are arranged in a circumferential array around the center line of the diversion line 140. Thus, the three core wires 111 are positioned.

[0041] In other embodiments, please refer to Figure 2 and Figure 3, an adjacent pair of core wires 111 and the outer protection unit 130 enclose a peripheral gap 190, and the diversion wire 140 is located within the peripheral gap 190. It can be understood that since the core wire 111 and the outer protection unit 130 are circular structures, when the outer protection unit 130 wraps the core wire 111, a peripheral gap 190 is formed between the adjacent two core wires 111 and the outer protection unit 130.

[0042] According to the above settings, please refer to Figure 2 , the diversion wire 140 abuts against the core wire 111 and the inner wall area of the outer protection unit 130. Specifically, the diversion wire 140 abuts against the inner wall of the outer protection unit 130 and a core wire 111, thereby supporting the core wire 111. It can be understood that since both the core wire 111 and the outer protection unit 130 are circular, when the outer protection unit 130 wraps the core wire 111, the adjacent two core wires 111 can cooperate with the outer protection unit 130 to form a peripheral gap 190. In addition, since the diversion wire 140 abuts against a core wire 111 and the inner wall of the outer protection unit 130, two diversion wires 140 can be arranged in each peripheral gap 190. Thus, 6 diversion wires 140 can be arranged, thereby increasing the number of diversion wires 140 to increase the weight of the submarine cable 100, thereby improving the safety of the power operation of the submarine cable 100 and at the same time improving the stability of the submarine cable 100.

[0043] In other embodiments, please refer to Figure 3 , the diversion wire 140 abuts against two adjacent core wires 111. Specifically, the diversion wire 140 abuts against two adjacent core wires 111, that is, the diversion wire 140 is tangent to two adjacent core wires 111, wherein the distances between the center point of the diversion wire 140 and the two tangent points are the same.

[0044] According to the above settings, the diversion wire 140 includes a first conductor 141 and a sheath 142. The sheath 142 wraps the first conductor 141, and the outer peripheral surface of the sheath 142 is wavy, thereby increasing the friction coefficient of the sheath 142, and further increasing the static friction when the diversion wire 140 abuts against the core wire 111 or the diversion wire 140 abuts against the outer protection structure, improving the safety of the power operation of the submarine cable 100 and at the same time improving the stability of the submarine cable 100.

[0045] Furthermore, please refer to Figure 4 and Figure 5, in other embodiments, the submarine cable 100 further includes a bracket 150 located in the central gap 180. The bracket 150 abuts against a plurality of core wires 111. The bracket 150 is provided with a through hole 151 for cooperating with the current-carrying wire 140 located in the central gap 180. In this embodiment, by providing the bracket 150 in the central gap 180, when assembling the submarine core, the core wires 111 can be positioned by the bracket 150 and abutted against the bracket 150, thus facilitating the installation. It should be noted that since the core wires 111 are circular in structure, the bracket 150 is provided as an arc that fits the outer peripheral surface of the core wires 111, and the number of arc surfaces changes accordingly according to the number of core wires 111 to be assembled.

[0046] It can be understood that when the current-carrying wire 140 is disposed in the central gap 180, a through hole 151 is provided in the bracket 150 so that the current-carrying wire 140 can pass through the through hole 151, avoiding the influence of the bracket 150 on the installation of the current-carrying wire 140. Furthermore, the current-carrying wire 140 can serve as a short-circuit path when a fault occurs in the core wires 111, thereby improving the safety of power operation.

[0047] It should be noted that the bracket 150 is made of an insulating material to avoid the phenomenon of short circuit caused by the conduction of the bracket 150, resulting in installation accidents.

[0048] Furthermore, the core wire 111 includes a second conductor 113, an alloy aluminum sheath 114, a hot melt adhesive layer 115, and a PE sheath 116. The alloy aluminum sheath 114 wraps the second conductor 113, and the hot melt adhesive layer 115 is disposed between the alloy aluminum sheath 114 and the PE sheath 116. Specifically, hot melt adhesive is coated on the alloy aluminum sheath 114 to bond the PE sheath 116 through the hot melt adhesive, improving the adhesiveness between the alloy aluminum sheath 114 and the PE sheath 116 and enhancing the temperature resistance of the submarine cable 100. It should be noted that after the adhesion is completed, the hot melt adhesive solidifies into the hot melt adhesive layer 115. Although heat is generated during the operation of the cable, the maximum temperature of the cable is 90 degrees, while the melting point of the hot melt adhesive is 150 degrees, so the hot melt adhesive will not melt and affect the adhesiveness. In this embodiment, the thickness of the hot melt adhesive layer 115 is 0.2 mm - 0.3 mm.

[0049] Furthermore, please refer to Figure 1, the core wire 111 includes a first shielding layer 118 wrapped around the second conductor 113, an insulating layer 119 wrapped around the first shielding layer 118, a second shielding layer 121 wrapped around the insulating layer 119, and a sheath 142 layer wrapped around the outer periphery of the second shielding layer 121. A semiconductive water-blocking tape 122 is wound around the outer periphery of the second shielding layer 121. Specifically, the second conductor 113 includes multiple shields arranged from inside to outside and a water-blocking adhesive provided between adjacent two shielding layers. Each shielding layer includes multiple aluminum alloy single wires, so that the second conductor 113 has excellent water-blocking performance and improved resistance characteristics. And a binding tape 117 is provided to wrap the second conductor 113. The second conductor 113 is further bound and fixed by the binding tape 117, and the binding tape 117 is made of a semiconductive water-blocking material and can also play a water-blocking role.

[0050] In this embodiment, each optical fiber 112 is connected and abutted against two adjacent core wires 111, so as to detect the temperature of the second conductor 113 and the first shielding layer 118 through the optical fiber 112 and transmit signals through the optical fiber 112. In this embodiment, the cable unit 110 further includes a filling strip 160 and a steel strand 170, and both the filling strip 160 and the steel strand 170 are located in the peripheral gap 190. Specifically, the filling strip 160 abuts against the optical fiber 112 and the inner peripheral surface of the outer protection unit 130. The steel strand 170 is located on both sides of the filling strip 160, and its outer peripheral surface abuts against a core wire 111, the filling strip 160, and the inner peripheral surface of the outer protection unit 130. The filling strip 160 and the steel strand 170 are provided to protect and support the optical fiber 112. A coated adhesive tape 123 is wound around the outer periphery of the cable unit 110 to tighten the cable unit 110 through the coated adhesive tape.

[0051] Further, please refer to Figure 1 , the outer protection unit 130 includes a lining layer 131 wrapped around the cable unit 110, an armor layer 132 wrapped around the lining layer 131, and a protective layer 133 wrapped around the armor layer 132. The armor layer is used for electrical connection with the ground wire. Among them, the lining layer 131 is a PP rope, which plays a buffering role through the lining layer 131. The cable unit 110 of the cable is protected by the armor layer 132 to avoid mechanical damage, and the outer periphery of the armor layer 132 is coated with asphalt for anti-corrosion. The protective layer 133 is a PP rope, which plays an outer protection role. It should be noted that the armor layer 132 and the diversion wire 140 are electrically connected to the ground wire together, so that when a fault occurs in the core wire 111, they serve as a short-circuit channel together with the diversion wire 140. Among them, the diversion wire 140 is a standby short-circuit channel to improve the safety of the circuit operation.

[0052] In summary, the submarine cable 100 includes a cable unit 110, an outer protection unit 130, and at least one diversion line 140; the cable unit 110 is disposed within the outer protection unit 130, and the cable unit 110 includes a plurality of core wires 111 and a plurality of optical fibers 112. The plurality of core wires 111 and the plurality of optical fibers 112 are both arranged in an annular array around the axis of the outer protection unit, and one optical fiber 112 is disposed between every two adjacent core wires 111; the diversion line 140 is disposed within the outer protection unit 130, and the diversion line 140 is used for electrically connecting to a ground wire; wherein, the diversion lines 140 located in the central gap 180 are all spaced from the core wires 111, or the diversion lines 140 located in the central gap 180 are all in contact with one or more core wires 111; the diversion lines 140 located in the peripheral gap 190 are in contact with the outer protection unit 130 and one core wire 111, or the diversion lines 140 located in the peripheral gap 190 are in contact with two adjacent core wires 111. By providing the diversion lines 140 connected to the ground wire in the central gap 180 formed by the plurality of core wires 111 or the peripheral gap 190 formed by two adjacent core wires 111 and the outer protection unit 130, when a fault occurs in the core wire 111, the diversion line 140 is used as a short-circuit path to improve the safety of the circuit operation.

[0053] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A submarine cable, characterized in that: include: External protection unit; A cable unit, the cable unit is arranged in the outer protection unit, the cable unit comprises a plurality of core wires and a plurality of optical fibers, the plurality of core wires and the plurality of optical fibers are arranged in a circular array around the axis of the outer protection unit, and one optical fiber is arranged between every two adjacent core wires; as well as At least one guide wire is disposed in the outer protection unit and is used for being electrically connected to a ground wire.

2. The submarine cable according to claim 1, characterized in that: A plurality of the core wires enclose a central gap, and the guide wire is located in the central gap.

3. The submarine cable according to claim 2, characterized in that: The guide wire abuts against one or more of the core wires.

4. The submarine cable according to claim 2, characterized in that: The submarine cable further comprises a bracket, the bracket is located in the central gap, the bracket abuts against the multiple core wires; the bracket is provided with a through hole, and the through hole cooperates with the guide wire.

5. The submarine cable according to claim 1, characterized in that: Two adjacent core wires and the outer protection unit enclose a peripheral gap, and the guide wire is located in the peripheral gap.

6. The submarine cable according to claim 4, characterized in that: The guide wire abuts against the core wire and the inner wall area of ​​the outer protection unit; or the guide wire abuts against two adjacent core wires.

7. The submarine cable according to claim 1, characterized in that: The guide wire includes a first conductor and a sheath, wherein the sheath wraps the first conductor, and the outer peripheral surface of the sheath is wavy.

8. The submarine cable according to any one of claims 1 to 7, characterized in that: The core wire comprises a second conductor, an alloy aluminum sheath, a hot melt adhesive layer and a PE sheath. The alloy aluminum sheath wraps the second conductor, and the hot melt adhesive layer is arranged between the alloy aluminum sheath and the PE sheath.

9. The submarine cable according to claim 8, characterized in that: The thickness of the hot melt adhesive layer is 0.2mm-0.3mm.

10. The submarine cable according to any one of claims 1 to 7, characterized in that: The outer protection unit includes an inner lining layer wrapped around the cable unit, an armor layer wrapped around the inner lining layer, and a protective layer wrapped around the armor layer, wherein the armor layer is used for being electrically connected to a ground wire.

Images