CN222995115U - Submarine cable - Google Patents

Abstract

The utility model relates to the technical field of ocean cables, in particular to a submarine cable. The submarine cable comprises a cable unit, an outer protection unit and at least one current conducting wire, wherein the cable unit is arranged in the outer protection unit and comprises a plurality of core wires and a plurality of optical fibers, the plurality of core wires and the plurality of optical fibers are all arranged in an annular array around the axis of the outer protection unit, one optical fiber is arranged between every two adjacent core wires, the current conducting 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 current conducting wire connected with the ground wire is arranged, and when the core wire fails, the current conducting wire is used as a short circuit channel, so that the safety of circuit operation is improved.

Description

Submarine cable

Technical Field

The utility model relates to the technical field of ocean cables, in particular to a submarine cable.

Background

Submarine cables are wires wrapped with insulating materials and laid on the sea and under rivers for telecommunication transmission. Modern submarine cables use fiber optics as the material to transmit telephone and internet signals. Submarine communication cables are mainly used for communication services, and although the submarine communication cables are expensive, the submarine communication cables are high in confidentiality. The submarine power cable is mainly used for transmitting high-power electric energy underwater and has the same function as the underground power cable, but the application occasions and the laying modes are different. Submarine cable engineering is recognized by countries around the world as a complex and difficult large-scale project from environmental detection, marine physics investigation, and design, manufacture and installation of cables.

However, the submarine cable in the prior art is prone to the problem of short circuit.

Disclosure of utility model

The utility model aims to provide a submarine optical cable, which can be used for improving the safety of circuit operation by arranging a current-guiding wire connected with a ground wire and taking the current-guiding wire as a short-circuit channel when a core wire fails.

Embodiments of the present utility model are implemented as follows:

The present utility model provides a submarine cable comprising:

An outer protection unit;

The cable unit is arranged in the outer protection unit and comprises a plurality of core wires and a plurality of optical fibers, the plurality of core wires and the plurality of optical fibers are all arranged in an annular array around the axis of the outer protection unit, one optical fiber is arranged between every two adjacent core wires, and

At least one current-guiding wire is arranged in the outer protection unit and is used for being electrically connected with the ground wire.

In an alternative embodiment, a plurality of cords are enclosed into a central gap, with the guide wire being located within the central gap.

In an alternative embodiment, the guide wire abuts one or more core wires.

In an alternative embodiment, the submarine cable further comprises a support, the support is located in the center gap and is in butt joint with the plurality of core wires, the support is provided with through holes, and the through holes are matched with the guide wires.

In an alternative embodiment, two adjacent core wires and the outer guard unit are surrounded to form a peripheral gap, and the guide wire is positioned in the peripheral gap.

In an alternative embodiment, the guide wire is in abutment with the core wire and the inner wall region of the outer guard unit is in abutment, or the guide wire is in abutment with two adjacent core wires.

In an alternative embodiment, the current lead comprises a first conductor and a sheath, the sheath surrounding the first conductor, the outer circumferential surface of the sheath being wavy.

In an alternative embodiment, the core wire includes a second conductor, an alloy aluminum sheath surrounding the second conductor, a hot melt adhesive layer disposed between the alloy aluminum sheath and the PE sheath, and the PE sheath.

In an alternative embodiment, the thickness of the hot melt adhesive layer is 0.2mm to 0.3mm.

In an alternative embodiment, the outer protection unit comprises an inner liner layer wrapped on the cable unit, an armor layer wrapped on the inner liner layer and a protective layer wrapped on the armor layer, and the armor layer is used for being electrically connected with the ground wire.

The beneficial effects of the embodiment of the utility model include:

The submarine cable comprises a cable unit, an outer protection unit and at least one current conducting wire, wherein the cable unit is arranged in the outer protection unit and comprises a plurality of core wires and a plurality of optical fibers, the plurality of core wires and the plurality of optical fibers are all arranged in an annular array around the axis of the outer protection unit, one optical fiber is arranged between every two adjacent core wires, the current conducting 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 current conducting wire connected with the ground wire is arranged, and when the core wire fails, the current conducting wire is used as a short circuit channel, so that the safety of circuit operation is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a cross-sectional view of a submarine cable according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a submarine cable according to other embodiments of the utility model;

FIG. 3 is a cross-sectional view of a submarine cable according to other embodiments of the utility model;

FIG. 4 is a cross-sectional view of a submarine cable according to other embodiments of the utility model;

fig. 5 is a partial enlarged view at a in fig. 4.

The icons are 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-glued cloth tape, 130-outer protection unit, 131-inner liner, 132-armor layer, 133-protective layer, 140-guide wire, 141-first conductor, 142-sheath, 150-bracket, 151-through hole, 160-filler strip, 170-steel strand, 180-central gap, 190-peripheral gap.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Referring to fig. 1-4, fig. 1 is a cross-sectional view of a submarine cable 100 according to an embodiment of the present utility model, fig. 2 is a cross-sectional view of a submarine cable 100 according to another embodiment of the present utility model, fig. 3 is a cross-sectional view of a submarine cable 100 according to another embodiment of the present utility model, fig. 4 is a cross-sectional view of a submarine cable 100 according to another embodiment of the present utility model, fig. 5 is a partial enlarged view at a in fig. 4, wherein the cross-sectional directions of fig. 1-4 are all perpendicular to the axis of the submarine cable 100

The submarine cable 100 comprises a cable unit 110, an outer protection unit 130 and at least one current lead 140, wherein the cable unit 110 is arranged in the outer protection unit 130, the cable unit 110 comprises 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 all arranged in an annular array around the axis of the outer protection unit, one optical fiber 112 is arranged between every two adjacent core wires 111, the current lead 140 is arranged in the outer protection unit 130, and the current lead 140 is used for being electrically connected with a ground wire.

The submarine cable 100 operates according to the following principle:

The submarine cable 100 transmits power by providing the core wire 111, and in case of a failure of the core wire 111, since the current lead 140 is electrically connected with the ground, the current lead 140 can be used as a short circuit path to improve the safety of the circuit operation.

Further, referring to fig. 1, the plurality of core wires 111 are surrounded by a central gap 180, and the drain wire 140 is located in the central gap 180. Specifically, three core wires 111 are provided in the present embodiment, and it is understood that the three core wires 111 have a circular structure, so that when the three core wires 111 are arranged in a circumferential array, i.e., in a triangular structure, a central gap 180 is formed. The present embodiment provides a current lead 140 and places the current lead 140 in the central gap 180, thereby facilitating twisting of the current lead 140, the core wire 111 and the optical fiber 112 into one piece when assembling the submarine cable 100.

In accordance with the above arrangement, in other embodiments, the plurality of guide wires 140 are connected in sequence such that each guide wire 140 abuts one or more of the core wires 111 or the guide wires 140 located in the central gap 180 are spaced from the core wires 111. Specifically, in the present embodiment, the submarine cable 100 is provided with one current lead 140, and then the current lead 140 abuts against the three cores 111, thereby supporting and positioning the cores 111. As can be appreciated, since the core wire 111 and the guide wire 140 are both of a circular structure, and the guide wire 140 abuts against the outer peripheral 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 guide wire 140, thereby positioning the three core wires 111.

In other embodiments, referring to fig. 2 and 3, two adjacent core wires 111 and the outer sheath 130 are enclosed to form a peripheral gap 190, and the drain wire 140 is located in the peripheral gap 190. As can be appreciated, since the core wire 111 and the outer sheath unit 130 have a circular structure, when the outer sheath unit 130 wraps the core wire 111, a peripheral gap 190 is formed between the adjacent two core wires 111 and the outer sheath unit 130.

According to the above arrangement, referring to fig. 2, the guide wire 140 abuts against the core wire 111, and the inner wall region of the outer protection unit 130 abuts against. Specifically, the guide wire 140 abuts against the inner wall of the outer sheath unit 130 and one core wire 111, thereby supporting the core wire 111. It can be appreciated that, since the core wire 111 and the outer protection unit 130 are both circular, when the outer protection unit 130 wraps the core wire 111, two adjacent core wires 111 can cooperate with the outer protection unit 130 to form a peripheral gap 190, and in addition, the current-guiding wire 140 abuts against one core wire 111 and the inner wall of the outer protection unit 130, two current-guiding wires 140 can be disposed in each peripheral gap 190. Thereby, 6 current conductors 140 may be provided, thereby increasing the number of current conductors 140 to increase the weight of the submarine cable 100, thereby improving the stability of the submarine cable 100 while improving the safety of the power operation of the submarine cable 100.

In other embodiments, referring to fig. 3, the guide wire 140 abuts two adjacent core wires 111. Specifically, the current lead 140 abuts against two adjacent core wires 111, i.e. the current lead 140 is tangential to two adjacent core wires 111, wherein the distance between the center point of the current lead 140 and the two tangential points is the same.

According to the above arrangement, the current lead 140 includes the first conductor 141 and the sheath 142, the sheath 142 wraps the first conductor 141, and the outer circumferential surface of the sheath 142 is wavy, so as to increase the friction coefficient of the sheath 142, further increase the static friction force when the current lead 140 abuts against the core wire 111 or the current lead 140 abuts against the outer sheath structure, and improve the stability of the submarine cable 100 while improving the safety of the electric power operation of the submarine cable 100.

Further, referring to fig. 4 and 5, in other embodiments, the submarine cable 100 further comprises a rack 150, where the rack 150 is located in the central gap 180, and the rack 150 abuts against the plurality of cores 111. And the bracket 150 is provided with a through hole 151, and the through hole 151 is used for being matched with the guide wire 140 positioned in the central gap 180. In this embodiment, the support 150 is disposed in the center gap 180, and when the submarine cell is assembled, the core wire 111 can be positioned by the support 150, and the core wire 111 is abutted against the support 150, so that the installation is facilitated. It should be noted that, since the core wire 111 has a circular structure, the holder 150 is provided in an arc shape to be fitted to the outer peripheral surface of the core wire 111, and the number of arc surfaces is changed accordingly according to the number of core wires 111 to be assembled.

It can be appreciated that when the current guide wire 140 is disposed in the central gap 180, the through hole 151 is disposed in the bracket 150, so that the current guide wire 140 can pass through the through hole 151, thereby avoiding the influence of the bracket 150 on the installation of the current guide wire 140, and further enabling the current guide wire 140 to serve as a short circuit channel when the core wire 111 fails, so as to improve the safety of electric power operation.

It should be noted that, the support 150 is made of an insulating material, so as to avoid the occurrence of a short circuit caused by the conduction of the support 150, which results in an installation accident.

Further, 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 wrapping the second conductor 113, the hot melt adhesive layer 115 being disposed between the alloy aluminum sheath 114 and the PE sheath 116. Specifically, a hot melt adhesive is applied to the alloy aluminum sheath 114, so that the PE sheath 116 is bonded by the hot melt adhesive, the adhesion between the alloy aluminum sheath 114 and the PE sheath 116 is improved, and the temperature property of the submarine cable 100 is improved. After the adhesion, the hot melt gel is a hot melt adhesive layer 115, and although the cable generates heat during operation, the highest temperature of the cable is 90 degrees, and the melting point of the hot melt adhesive is 150 degrees, so that the hot melt adhesive cannot be melted to affect the viscosity. In this embodiment, the thickness of the hot melt adhesive layer 115 is 0.2mm-0.3mm.

Further, referring to fig. 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. The outer circumference of the second shield layer 121 is wrapped with a semiconductive water blocking tape 122. Specifically, the second conductor 113 includes a plurality of shields arranged from inside to outside and a water blocking adhesive arranged between two adjacent shield layers, each of which includes a plurality of aluminum alloy monofilaments, so that the second conductor 113 is excellent in water blocking performance and improved in resistance characteristics. And a binding band 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 also has a water blocking effect.

In the present embodiment, each of the optical fibers 112 is connected to and abutted against the adjacent two core wires 111, so that the temperatures of the second conductor 113 and the first shielding layer 118 are detected by the optical fibers 112, and signals are transmitted through the optical fibers 112. In this embodiment, the cable unit 110 further includes filler strips 160 and steel strands 170, both of which are located in the peripheral gap 190. Specifically, the filler rod 160 is in contact with the inner peripheral surfaces of the optical fiber 112 and the outer sheath unit 130, the steel strands 170 are positioned on both sides of the filler rod 160, and the outer peripheral surfaces thereof are in contact with the inner peripheral surfaces of the core wire 111, the filler rod 160, and the outer sheath unit 130, and the filler rod 160 and the steel strands 170 are provided to protect and support the optical fiber 112. The outer circumference of the cable unit 110 is wrapped with a rubberized tape 123, and the cable unit 110 is fastened by the rubberized tape.

Further, referring to fig. 1, the outer protection unit 130 includes an inner liner 131 wrapped around the cable unit 110, an armor layer 132 wrapped around the inner liner 131, and a protective layer 133 wrapped around the armor layer 132, where the armor layer is electrically connected to a ground wire. Wherein, inner liner 131 is the PP rope, plays the cushioning effect through inner liner 131, protects cable unit 110 of cable through armor 132, avoids mechanical damage to the periphery coating of armor 132 has pitch, carries out the anticorrosion, and protective layer 133 is the PP rope, plays outer guard action. It should be noted that, the armor layer 132 is electrically connected with the current-guiding wire 140 together with the ground wire, so that when the core wire 111 fails, the armor layer and the current-guiding wire 140 together serve as a short-circuit channel, wherein the current-guiding wire 140 serves as a standby short-circuit channel to improve the safety of circuit operation.

In summary, the submarine cable 100 includes a cable unit 110, an outer protection unit 130 and at least one current guiding wire 140, wherein the cable unit 110 is disposed in 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 all arranged in an annular array around an axis of the outer protection unit, one optical fiber 112 is disposed between every two adjacent core wires 111, the current guiding wire 140 is disposed in the outer protection unit 130, the current guiding wire 140 is used for electrically connecting with a ground wire, the current guiding wires 140 located in a central gap 180 are all spaced from the core wires 111, or the current guiding wires 140 located in the central gap 180 are all abutted against one or more core wires 111, the current guiding wires 140 located in a peripheral gap 190 are abutted against the outer protection unit 130 and one core wire 111, or the current guiding wires 140 located in the peripheral gap 190 are abutted against two adjacent core wires 111. The submarine cable 100 has the advantage that the current lead 140 connected with the ground is arranged in the central gap 180 formed by the plurality of core wires 111 or the peripheral gap 190 formed by the two adjacent core wires 111 and the outer protection unit 130, and when the core wires 111 fail, the current lead 140 is used as a short circuit channel, so that the safety of circuit operation is improved.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A submarine cable, comprising:

An outer protection unit;

The cable unit is arranged in the outer protection unit and comprises a plurality of core wires and a plurality of optical fibers, the core wires and the optical fibers are all arranged in an annular array around the axis of the outer protection unit, one optical fiber is arranged between every two adjacent core wires, and

And the current conducting wire is arranged in the outer protection unit and is used for being electrically connected with the ground wire.

2. Submarine cable according to claim 1, characterized in that:

the plurality of core wires enclose a central gap, and the guide wire is positioned in the central gap.

3. Submarine cable according to claim 2, characterized in that:

the guide wire is abutted with one or more core wires.

4. Submarine cable according to claim 2, characterized in that:

The submarine cable further comprises a support, the support is located in the center gap and is in butt joint with the plurality of core wires, the support is provided with through holes, and the through holes are matched with the guide wires.

5. Submarine cable according to claim 1, characterized in that:

And two adjacent core wires and the outer protection unit are enclosed to form a peripheral gap, and the guide wire is positioned in the peripheral gap.

6. The submarine cable according to claim 4, wherein:

The guide line is abutted with the core wire and is abutted with the inner wall area of the outer protection unit, or the guide line is abutted with two adjacent core wires.

7. Submarine cable according to claim 1, characterized in that:

The current-conducting wire comprises a first conductor and a sheath, wherein the sheath wraps the first conductor, and the outer circumferential surface of the sheath is wavy.

8. Submarine cable according to any of claims 1-7, characterized in that:

the core wire comprises a second conductor, an alloy aluminum sheath, a hot melt adhesive layer and a PE sheath, wherein 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. Submarine cable according to claim 8, characterized in that:

The thickness of the hot melt adhesive layer is 0.2mm-0.3mm.

10. Submarine cable according to any of claims 1-7, characterized in that:

The outer protection unit comprises an inner liner layer, an armor layer and a protective layer, wherein the inner liner layer is wrapped on the cable unit, the armor layer is wrapped on the inner liner layer, the protective layer is wrapped on the armor layer, and the armor layer is used for being electrically connected with a ground wire.