WO2023065426A1

WO2023065426A1 - Dynamic submarine optical cable

Info

Publication number: WO2023065426A1
Application number: PCT/CN2021/130092
Authority: WO
Inventors: 邱兴宇; 顾春飞; 孙杰; 胡明; 张洪亮; 蒋峰; 陈珍珍; 徐麟鑫; 陈小刚
Original assignee: 中天科技海缆股份有限公司
Priority date: 2021-10-21
Filing date: 2021-11-11
Publication date: 2023-04-27
Also published as: CN116009159A

Abstract

The present application relates to the technical field of optical cables, and in particular to a dynamic submarine optical cable, comprising: a core (1), at least three armor layers (2, 4, 6, 8), and an outer sheath (10) provided in sequence from the inside to the outside, wherein each armor layer (2, 4, 6, 8) comprises at least one armor structure, a partition layer (3, 5, 7) is arranged between two adjacent armor layers (2, 4, 6, 8), and the stranding directions of two adjacent armor layers (2, 4, 6, 8) are opposite. A dynamic submarine optical cable having a long service life and good stability in seawater is provided.

Description

A dynamic submarine optical cable

Cross References to Related Applications

This disclosure is based on the Chinese patent application 202111230251.5 filed on October 21, 2021 with the title of "A Dynamic Submarine Optical Cable and Its Manufacturing Method", and claims the priority of this patent application. into this disclosure.

technical field

The embodiments of the present application relate to the technical field of optical cables, and in particular to a dynamic submarine optical cable.

Background technique

Conventional submarine optical cables are mainly used between continents, between continents and islands, between islands, and between coastal cities. This kind of submarine optical cable is generally used statically, and it is constructed by burying during construction, that is, the submarine optical cable is directly buried on the seabed to avoid the influence of ocean currents during long-term use. With the development of marine resources, there are more and more applications of offshore floating platforms in deep seas, but offshore floating platforms generally use satellite communications, because conventional static submarine optical cables cannot withstand dynamic fatigue caused by external forces such as ocean currents and waves, which in turn leads to The fiber optic cable fails and the optical fiber breaks, affecting the communication of the offshore platform.

For this reason, dynamic optical cables have been developed to meet the above requirements, but the relevant dynamic submarine optical cables are generally double-layer steel wire armored, and the weight in seawater generally does not exceed 2.5kg/m. Due to the small weight of the cable, the stability in seawater is poor. The anti-dynamic fatigue characteristics of long-term work are poor, and the service life is generally 3 years, which is far less than the 25-year service life of the static submarine optical cable. The dynamic submarine optical cable needs to be replaced frequently during the service life of the system, which is inconvenient to operate.

Contents of the invention

Therefore, the technical problem to be solved by the embodiments of the present application is to overcome the short service life and poor stability in seawater of the dynamic optical cable in the related art, so as to provide a long service life and high stability in seawater. Good dynamic submarine cable.

In order to solve the above technical problems, the embodiment of the present application provides a dynamic submarine optical cable, including:

The core, at least three layers of armor and the outer sheath are sheathed in sequence from the inside to the outside;

Wherein, each armoring layer includes at least one armoring structure, a separation layer is provided between two adjacent armoring layers, and the stranding directions of the two adjacent armoring layers are opposite.

Optionally, the number of layers of the armor structure of two adjacent armor layers is different, and the number of layers of the armor structure of the two armor layers arranged at intervals is the same.

Optionally, the diameter of the armor structure of the inner armor layer is smaller than the diameter of the armor structure of the adjacent outer armor layer.

Optionally, the ratio of the twisted length along the axial direction of the optical cable to the twisted length along the radial direction of each armor layer is 5-25, and the ratio decreases successively from inside to outside.

Optionally, the ratio of the sum of the torsional parameters of the two armor layers arranged at intervals to the sum of the torsional parameters of the armor layers of the adjacent outer layer is 0.95-1.05.

Optionally, a filling material is provided in the gap of the armor layer.

Optionally, the core body includes a strength member, an optical fiber metal tube and a filling tube twisted on the periphery of the strength member, and the fiber metal pipe and filling pipe are arranged at intervals along the periphery of the strength member.

Optionally, the ratio of the twisted length along the axial direction of the optical cable to the twisted length along the radial direction of the optical fiber metal tube and the filling tube is 5-25.

Optionally, the diameter of the filling tube is not smaller than the diameter of the optical fiber metal tube.

Optionally, a second wrapping layer and a multi-layer protective layer are sequentially arranged on the outer circumference of the optical fiber metal tube and the filling tube, the second wrapping layer is filled with a water-blocking material, and the adjacent two layers of protective layers There is a reinforced layer in between.

The technical solution of the embodiment of the present application has the following advantages:

1. The dynamic submarine optical cable provided by the embodiment of the present application includes a core, at least three layers of armor and an outer sheath that are sheathed sequentially from the inside to the outside. At least three layers of armor increase the weight of the cable and improve its The stability in seawater can withstand the dynamic fatigue caused by external forces such as ocean currents and waves during dynamic use; and the stranding directions of two adjacent armor layers are opposite, so that the optical cable can maintain dynamic balance on the seabed, and at the same time two adjacent There is a separation layer between the layers of armor, which avoids mutual abrasion between adjacent armor layers twisted in opposite directions during dynamic use, and prolongs the service life.

2. For the dynamic submarine optical cable provided by the embodiment of the present application, the ratio of the stranding length in the axial direction of each armor layer to the stranding length in the radial direction of each armor layer is 5-25, and the ratio decreases sequentially from the inside to the outside , which can make the outer armor layer lock the inner armor layer and improve the structural stability of the optical cable.

3. In the dynamic submarine optical cable provided by the embodiment of the present application, the ratio of the sum of the torsion parameters of the two layers of armor layers arranged at intervals to the sum of the torsional parameters of the armor layers of the adjacent outer layers is 0.95-1.05, ensuring The dynamic submarine cable will not twist during use, further extending the service life.

3. In the dynamic submarine optical cable provided by the embodiment of the present application, filling material is provided in the gap between the armor layers, which reduces mutual abrasion between the armor layers during the dynamic use of the optical cable.

5. In the dynamic submarine optical cable provided by the embodiment of the present application, the optical fiber metal tube and the filling tube are arranged at intervals on the outer periphery of the strength member, which prevents the mutual abrasion between the optical fiber metal tubes.

6. For the dynamic submarine optical cable provided in the embodiment of the present application, the diameter of the filling pipe is not smaller than the diameter of the optical fiber metal pipe, so as to avoid the failure of the optical fiber metal pipe when subjected to radial forces such as impact and flattening.

7. The dynamic submarine optical cable provided by the embodiment of the present application is further provided with a wrapping layer and a multi-layer protective layer on the outer periphery of the optical fiber metal tube and the filling tube. There is a reinforced layer in between. The setting of the water-blocking material improves the waterproof performance of the optical cable and prolongs the service life; the setting of the reinforcing layer enhances the mechanical properties of the protective layer and improves the fatigue resistance.

Description of drawings

In order to more clearly illustrate the specific implementation methods of the embodiments of the present application or the technical solutions in the related technologies, the following will briefly introduce the drawings that need to be used in the descriptions of the specific embodiments or related technologies. Obviously, the accompanying drawings in the following description The drawings are some implementations of the embodiments of the present application. For those skilled in the art, other drawings can also be obtained according to these drawings without creative work.

FIG. 1 is a schematic diagram of a dynamic submarine optical cable provided by an embodiment of the present application;

Figure 2 is an enlarged schematic view of the core body shown in Figure 1;

Fig. 3 is a schematic diagram of another embodiment of the dynamic submarine optical cable provided by the embodiment of the present application.

Explanation of reference signs:

1. Core; 2. The first armor layer; 3. The first separation layer; 4. The second armor layer; 5. The second separation layer; 6. The third armor layer; 7. The third separation layer; 8. The fourth armor layer; 9. The first wrapping layer; 10. The outer sheath; 11. The reinforcement; 12. The optical fiber metal tube; 13. The filling tube; 14. The second wrapping layer; 15. The protective layer ; 16, the first sheath; 17, the reinforcing layer; 18, the second sheath.

Detailed ways

The following will clearly and completely describe the technical solutions of the embodiments of the present application with reference to the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the embodiments of the present application.

In addition, the technical features involved in different implementations of the embodiments of the present application described below may be combined as long as they do not constitute a conflict with each other.

A specific implementation of the dynamic submarine optical cable shown in Figures 1 and 2, including a core 1, a first armor layer 2, a first separation layer 3, and a second armor layer 4 that are sheathed in sequence from the inside to the outside , The second separation layer 5, the third armor layer 6, the third separation layer 7, the fourth armor layer 8, the first wrapping layer 9 and the outer sheath 10.

The core body 1 includes a reinforcing member 11 arranged in the center, an optical fiber metal tube 12 twisted on the outer periphery of the reinforcing member 11, a filling tube 13, a second wrapping layer 14 and a multi-layer protection, which are sequentially arranged from the inside to the outside. Layer 15.

The reinforcing member 11 is made of plastic-coated steel wire or non-metallic reinforcing member (Fiber Reinforced Polymer, FRP for short). The optical fiber metal tube 12 is composed of optical fiber, fiber paste and stainless steel tube. The fiber optic metal tube 12 has an excess length of 1.5-6‰ before twisting; the filling tube 13 is made of plastic-coated steel wire or non-metallic reinforcing wire (FRP). 13 can be distinguished by different color areas or surface marks, the diameter of the filling tube 13 is not smaller than the diameter of the optical fiber metal tube 12; the optical fiber metal tube 12 and the filling tube 13 are twisted on the surface of the reinforcement 11, and the When arranged at intervals along the outer circumference of the reinforcing member 11 , the ratio of the stranding length in the axial direction of the optical cable to the stranding length in the radial direction of the optical fiber metal tube 12 and the filling tube 13 is 5-25. All the gaps of the second wrapping layer 14 are filled with water-blocking material, and the water-blocking material is thermally filled. The multi-layer protective layer 15 includes a first protective layer 16, a reinforcement layer 17 and a second protective layer 18 arranged in sequence from the inside to the outside. The first protective layer 16 and the second protective layer 18 are made of the same material, which can be polyurethane, polyethylene or It is extruded from polypropylene, the nominal thickness of the first sheath 16 and the second sheath 18 is not less than 1.5mm, and the reinforcement layer is formed by weaving outside the first sheath 16, and the weaving material can be steel wire or non-metallic reinforcement wire .

The first armoring layer 2 and the third armoring layer 6 all include two layers of armoring structure, the second armoring layer 4 and the fourth armoring layer 8 all include one layer of armoring structure, the first armoring layer 2 and the second armoring layer The stranding directions of the three armor layers 6 are the same, for example, all are clockwise, and the stranding directions of the second armor layer 4 and the fourth armor layer 8 are the same, for example, all are counterclockwise, and the first armor layer The stranding direction of the armor layer 2 and the third armor layer 6 is opposite to that of the second armor layer 4 and the fourth armor layer 8 , that is, the stranding directions of two adjacent armor layers are opposite. Optionally, the diameters of the first armoring layer 2 and the third armoring layer 6 are identical, the diameters of the second armoring layer 4 and the fourth armoring layer 8 are identical, and the first armoring layer 2 and the third armoring layer The diameter of the layer 6 is smaller than the diameter of the second armor layer 4 and the fourth armor layer 8 . The ratio of the stranding length in the axial direction of each armor layer to the stranding length in the radial direction is 5-25, that is, the ratio gradually decreases from the first armor layer 2 to the fourth armor layer 8 . And the ratio of the sum of the torsion parameters of the first armor layer 2 and the third armor layer 6 to the sum of the torsion parameters of the second armor layer 4 and the fourth armor layer 8 is 0.95-1.05.

In the production process, the armor layer is armored by layered armor. After each layer of armor is armored, it needs to be pre-stretched to stabilize the state of the armored layer. The pre-stretched tension is the armored strength The pre-stretching time is not less than 10 minutes; there is a filling material in the gap of the armor layer, and the filling material adopts special friction-reducing grease.

The first separation layer 3, the second separation layer 5, and the third separation layer 7 are all made of non-metallic wrapping tapes such as polyester braided tapes and cotton cloth tapes, and the non-metallic wrapping tapes are formed by overlapping wrapping. The rate is not less than 10%.

The first wrapping layer 9 is formed by lapping and wrapping non-metallic wrapping tapes such as polyester braids and cotton tapes, and the lapping rate of the wrapping is not less than 15%, which is used to avoid overflow of filling materials in the gap of the armor layer.

The outer protective layer 10 is extruded on the surface of the first wrapping layer, and is extruded from anti-ultraviolet aging polyethylene or polyurethane material.

The dynamic submarine optical cable provided by the embodiment of the present application can be applied to the construction of submarine communication systems, especially the submarine optical cable in the landing section of the offshore platform, which realizes the structural design of the dynamic submarine optical cable and enables the dynamic use of the submarine optical cable; it has good performance in seawater Stability, able to withstand dynamic fatigue caused by external forces such as ocean currents and waves during long-term work, and realize long-term dynamic use of submarine optical cables.

As an alternative embodiment, as shown in Figure 3, the number of layers of the armor structure of two adjacent armor layers can be the same, such as one layer; the diameter of the armor structure of the inner armor layer is larger than the same The diameter of the armor structure of the adjacent outer armor layer; multiple filling tubes, for example three, can be arranged between two adjacent optical fiber metal tubes.

As an alternative embodiment, a separation layer may be provided between adjacent armored structures in the same direction, for example, between two armored structures of the first armored layer and the third armored layer.

As an alternative embodiment, the filling tube may use an insulated core formed by a copper conductor and an insulating layer to increase the power supply function of the dynamic submarine optical cable.

As an alternative embodiment, the stainless steel tube in the optical fiber metal tube may be a copper tube.

As an alternative embodiment, the separation layer may adopt a longitudinal wrapping method instead of a wrapping method.

As an alternative embodiment, the entire armor layer is pre-stretched after production.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or changes derived therefrom are still within the protection scope of the invention of the present application.

Industrial Applicability

The dynamic submarine optical cable provided by the embodiment of the present invention includes a core, at least three layers of armor and an outer sheath that are sheathed sequentially from the inside to the outside. At least three layers of armor increase the weight of the cable and improve its performance in seawater. The stability in the medium can withstand the dynamic fatigue caused by external forces such as ocean currents and waves during dynamic use; and the stranding directions of the two adjacent armor layers are opposite, so that the optical cable can maintain dynamic balance on the seabed, and at the same time the adjacent two layers of armor There is a separation layer between the armor layers, which avoids mutual abrasion between adjacent armor layers twisted in opposite directions during dynamic use, and prolongs the service life.

Claims

A dynamic submarine optical cable, comprising:

A core (1), at least three armor layers and an outer sheath (10) are sheathed sequentially from the inside to the outside;

Wherein, each armoring layer includes at least one armoring structure, a separation layer is provided between two adjacent armoring layers, and the stranding directions of the two adjacent armoring layers are opposite.
The dynamic submarine optical cable according to claim 1, wherein the number of layers of the armor structure of two adjacent armor layers is different, and the number of layers of the armor structure of the two layers of armor layers arranged at intervals is the same.
The dynamic submarine optical cable according to claim 2, wherein the diameter of the armor structure of the inner armor layer is smaller than the diameter of the armor structure of the adjacent outer armor layer.
The dynamic submarine optical cable according to any one of claims 1-3, wherein the ratio of the twisted length of each armor layer along the axial direction of the cable to the twisted length along the radial direction is 5-25, and the The ratio decreases sequentially from the inside to the outside.
The dynamic submarine optical cable according to any one of claims 1-3, wherein the ratio of the sum of the torsion parameters of the two layers of armor layers arranged at intervals to the sum of the torsion parameters of the armor layers of the adjacent outer layers is 0.95-1.05.
The dynamic submarine optical cable according to any one of claims 1-3, wherein a filling material is provided in the gap of the armor layer.
The dynamic submarine optical cable according to any one of claims 1-3, wherein the core body comprises a strengthening member (11), an optical fiber metal tube (12) twisted on the outer periphery of the strengthening member (11) and a filling tube (13), the optical fiber metal tube (12) and the filling tube (13) are arranged at intervals along the outer circumference of the reinforcing member (11).
The dynamic submarine optical cable according to claim 7, wherein the ratio of the stranding length in the axial direction of the optical cable to the stranding length in the radial direction of the optical fiber metal tube (12) and the filling tube (13) is 5-25.
The dynamic submarine optical cable according to claim 8, wherein the diameter of the filling pipe (13) is not smaller than the diameter of the optical fiber metal pipe (12).
The dynamic submarine optical cable according to any one of claims 8-9, wherein a second wrapping layer (14) and a multi-layer protective layer are sequentially arranged on the outer circumference of the optical fiber metal tube (12) and the filling tube (13) layer (15), the second wrapping layer is filled with water-blocking material, and a reinforcement layer (17) is provided between two adjacent protective layers (15).