WO2018223620A1

WO2018223620A1 - Deep-sea feeder cable

Info

Publication number: WO2018223620A1
Application number: PCT/CN2017/111638
Authority: WO
Inventors: 商庆亮; 许人东; 孙贵林; 冯聪; 蔡旦军; 胥国祥; 沈韦韦; 宋敬涛; 陈小龙; 于文慧
Original assignee: 江苏亨通海洋光网系统有限公司
Priority date: 2017-06-08
Filing date: 2017-11-17
Publication date: 2018-12-13
Also published as: CN107219597A

Abstract

A deep-sea feeder cable, comprising an optical unit (2), an armor layer (3), a feeder layer (5), and an insulation layer (4). The armor layer (3) comprises an inner stranded layer and an outer stranded layer. The inner stranded layer has a plurality of first stranded metal wires (6). The outer stranded layer has a plurality of second stranded metal wires (8) and a plurality of third stranded metal wires (10). The second stranded metal wires (8) and the third stranded metal wires (10) are sequentially and alternately arranged, and the wire diameter of the third stranded metal wire (10) is less than the wire diameter of the second stranded metal wire (8). The plurality of first stranded metal wires (6) is stranded at an outer side of the optical unit (2). The second stranded metal wires (8) and the third stranded metal wires (10) are stranded at intervals along the first stranded metal wires (6). The third stranded metal wires (10) are stranded on the second stranded metal wires (8), wherein the stranding directions thereof are the same. The deep-sea feeder cable improves impact resistance, crush resistance, and the mechanical tensile properties of a deep-sea feeder sea cable, as well as the longitudinal water resistance and radial water resistance of the sea cable. This lowers manufacturing and maintenance costs of the sea cable, reduces damage to optical fibers during manufacture, and improves the insulative properties of the sea cable.

Description

Feeding deep sea cable

Technical field

The invention belongs to the technical field of submarine cables, and particularly relates to a feeder deep sea optical cable.

Background technique

Submarine cable is the high-end variety of cable products "big family" with the highest technical content, the most difficult manufacturing, and the most complicated application environment. It has been applied for water depth up to 8000 meters, with large capacity and high reliability transmission performance. It is mainly used for submarine cable. Trans-ocean intercontinental communications, defense communications, ocean exploration and monitoring networks. The current common deep sea cable has the following shortcomings:

1. The water-blocking material is difficult to fill, it is difficult to fill it fully, and the influence of seawater itself on conventional water-blocking materials causes the longitudinal water-blocking ability of the cable to be poor. Once the cable is broken during use, the length of maintenance required is large. , long maintenance time;

2, the impact resistance, anti-shrinking performance is poor, the cable core mechanical tensile performance is insufficient, can not meet the deep sea deployment and recovery tension requirements, can not be directly applied to the deep sea water depth environment;

3. The radial water blocking capacity of the cable is poor, and the edge of the copper strip is prone to rise during the manufacturing process, thereby causing damage to the sheath layer and reducing the insulation performance of the cable;

4. The outer tube of the optical unit is wrapped with copper and the outer sheath as the core. Because there is no inner layer armor protection, the core is easily twisted during the production process, which poses a great risk to the core unit of the submarine cable.

Summary of the invention

In order to solve the above technical problems, the present invention provides a feeder deep sea optical cable, which improves the impact resistance, crush resistance, and mechanical tensile properties of the submarine cable, and improves the longitudinal water blocking performance and radial water resistance of the submarine cable. Performance, reducing the manufacturing cost and maintenance cost of the submarine cable, reducing damage to the fiber during the manufacturing process, and improving the insulation performance of the submarine cable.

In order to achieve the above object, the technical solution of the present invention is as follows: a feeder deep sea optical cable, comprising a light unit, an armor layer stranded on the outside of the light unit, a feed layer wrapped on the outer side of the armor layer, and coated on the feed An insulating layer on the outer side of the electric layer, characterized in that the armor layer comprises an inner strand and an outer strand, and the inner strand The layer is stranded outside the light unit, the outer strand is stranded outside the inner strand, and the feed layer is wrapped outside the outer strand;

The inner strand has a plurality of first stranded wires, the outer strand has a plurality of second stranded wires and a third stranded wire, the second stranded wire and a third stranded wire The wire is alternately disposed, and the wire diameter of the third stranded wire is smaller than the wire diameter of the second stranded wire;

A plurality of first stranded wires are stranded outside the light unit, and the second stranded wire and the third stranded wire are stranded on the first stranded wire, the third stranded metal Wire stranded on the second stranded wire;

The twisted pitch of the first stranded wire, the second stranded wire, and the third stranded wire is the same, and the twisting direction is the same.

In a preferred embodiment of the present invention, the feeding layer is an aluminum tube, and the aluminum tube is formed by an aluminum strip and welded by argon arc welding.

In a preferred embodiment of the invention, the step of further forming the aluminum strip into an aluminum tube is as follows:

S1, online cleaning: after the aluminum strip is taken out, it is cleaned on-line to deoxidize and remove impurities on the aluminum strip;

S2, molding: forming the aluminum strip after the online cleaning into a tubular structure;

S3: welding: after the aluminum strip is formed into a tubular structure, the joint of the tubular structure is welded by argon arc welding to form an aluminum tube;

S4: Aluminum tube drawing: The aluminum tube after welding is drawn by the drawing process, so that the outer diameter of the aluminum tube is smaller than the outer diameter of the armor layer and the thickness of the double aluminum strip, and the aluminum after the drawing A tube forms the feed layer.

In a preferred embodiment of the present invention, the gap between the first stranded wire, the second stranded wire, and the third stranded wire is further filled with a water blocking material.

In a preferred embodiment of the present invention, the water blocking material further comprises 80% to 90% by weight of an emulsifiable polyol, and 10% to 20% by weight of a polymer plasticizer.

In a preferred embodiment of the present invention, the first stranded wire, the second stranded wire, and the third stranded wire are all phosphating wires.

In a preferred embodiment of the present invention, the wire diameter of the second stranded wire is further smaller than the wire diameter of the first stranded wire.

In a preferred embodiment of the present invention, the light unit further includes an optical fiber, a stainless steel tube coated on the outer side of the optical fiber, and a gap between the optical fiber and the stainless steel tube is filled with the magnetic paste.

In a preferred embodiment of the present invention, the method further includes providing an adhesive layer between the feed layer and the insulating layer.

In a preferred embodiment of the invention, the insulating layer further comprises a polyethylene insulating layer.

The beneficial effects of the invention are:

First, the stranded layer of the stranded wire is formed by three twisted wires of three unequal wire diameters, and the duty ratio of the wire is about 85%, which is comparable to the conventional 75% duty cycle. Improve the mechanical tensile properties of 13%; increase the duty cycle to greatly increase the load carrying capacity of the armor, and increase the duty ratio to reduce the gap of the armor layer, thereby greatly improving the longitudinal water blocking capacity of the cable. , reduce maintenance costs, improve the impact resistance of the submarine cable, and resistance to crushing force;

Secondly, the ratio of the volume cost of the double-layer stranded phosphating steel wire to the inner layer water blocking material is 1:4, and the volume cost of the inner layer material of the inner cable of the conventional optical cable is 0.75*1+(1-0.75 *4=1.75, the inner layer material volume cost of the inner core layer of the present invention is 0.85*1+(0-0.85)*4=1.45, which greatly reduces the cost of intrinsic defects;

Third, the conductivity of aluminum is 61% of copper, and the price of aluminum strip is only 30% of copper strip. The aluminum tube is used as the feeding layer to meet the same DC resistance, and the material cost of the feeding part of the optical cable is greatly reduced. 30%*61%=49%;

Fourth, the conductivity of aluminum is 61% of copper, and the density of aluminum is only 30% of copper. The aluminum tube is used as the feeding layer to satisfy the same DC resistance, and the weight of the feeding part of the cable is greatly reduced by 30%. *61%=49%;

Fifth, with the traditional copper material feeding layer, the melting point of aluminum is low, and the bear defect aluminum tube appearing in the support can be better repaired;

Sixth, the aluminum tube used for drawing is used as the feeding layer, which can reduce the radial gap of the core. After the radial gap of the core is reduced, the radial water blocking capacity of the cable can be improved on the one hand, and the other Aspect Enough to increase the adhesion between the aluminum tube and the armor layer, greatly reducing the risk of construction and joints;

7. After the aluminum strip is welded by argon arc welding, the stability of the optical cable structure can be better realized, and the radial water blocking capability of the optical cable can be improved;

8. The optical cable of the present application satisfies the requirement of direct laying in a deep sea of more than 2000 m.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the technical description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some implementations of the present invention. For example, other drawings may be obtained from those of ordinary skill in the art in light of the inventive work.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the structure of a preferred embodiment of the present invention.

Wherein: 2-photovoltaic, 3-armor layer, 4-insulation layer, 5-feed layer, 6-first stranded wire, 8-second stranded wire, 10-third stranded wire , 12-fiber, 14-stainless steel tube, 16-fiber paste, 18-bonded layer.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example

As shown in FIG. 1 , in this embodiment, a feed deep sea optical cable is disclosed, which comprises a light unit 2, an armor layer 3 stranded on the outside of the light unit 2, and a feed layer 5 wrapped on the outside of the armor layer 3. The adhesive layer 18 coated on the outer side of the feed layer 5 and the high-density polyethylene insulating layer 4 coated on the outer side of the adhesive layer 18.

The optical unit 2 includes an optical fiber 12 and a stainless steel tube 14 that is wrapped around the outer side of the optical fiber 12. The gap between the optical fiber 12 and the stainless steel tube 14 is filled with the silver paste 16.

The armor layer 3 includes an inner strand layer and an outer strand layer, the inner strand layer is stranded on the outer side of the stainless steel tube 14, the outer strand layer is stranded outside the inner strand layer, and the feed layer 5 is wrapped on the outer side of the outer strand layer;

The inner twisted layer has a plurality of first stranded wires 6 . In the technical solution of the embodiment, the first strand is twisted. The wire 6 is preferably circular in cross section, and a plurality of first stranded wires 6 are wound around the outer side of the light unit 2; the outer strand has a plurality of second stranded wires 8 and a third strand In the technical solution of the present embodiment, the cross sections of the second stranded wire 8 and the third stranded wire 10 are preferably circular, and the wire diameter of the third stranded wire 10 is smaller than the second strand. The wire diameter of the wire 8, the wire diameter of the second stranded wire is smaller than the wire diameter of the first stranded wire.

In order to further reduce the gap between the stranded wires and increase the duty ratio of the stranded wires, the second stranded wire 8 and the third stranded wire 10 are alternately arranged in sequence, and both are lighted The center of the unit 2 is the center of the circle M inward;

A plurality of first stranded wires 6 are stranded on the outside of the stainless steel tube 14, and the second stranded wire 8 and the third stranded wire 10 are circumferentially stranded on the first stranded wire 6, the third The stranded wire 10 is stranded on the second stranded wire 8.

The third stranded wire 10 having the smallest wire diameter is used to fill the gap between the first stranded wire 6 and the second stranded wire 8, and the first stranded wire 6 and the second stranded can be reduced. The gap between the wire 8 and the third stranded wire 10 increases the duty cycle between the three from 75% to 85%.

In order to ensure that the second stranded wire 8 is embedded in the first stranded wire 6 at all times, the third stranded wire 10 is embedded in the first stranded wire 6 and the second stranded wire 8 at all times, further improving The duty ratio between the wires is the same as that of the first stranded wire 6, the second stranded wire 8, and the third stranded wire 10, and the twisting direction is the same.

In the technical solution of the embodiment, the first stranded wire 6, the second stranded wire 8, and the third stranded wire 10 are preferably phosphating steel wires.

The gap between the first stranded wire 6, the second stranded wire 8, and the third stranded wire 10 is filled with a water blocking material, which is water-blocking compared to the conventional water blocking yarn and water blocking tape. The material of the embodiment is preferably a two-component mixed rubber as a water blocking material, wherein the two-component mixed rubber comprises 80% to 90% by weight of an emulsifiable polyol, and the weight percentage is 10% to 20%. Polymer plasticizer. The traditional water-blocking yarn and water-blocking belt have a large viscosity, and it is difficult to fill the gap sufficiently; at the same time, the water-blocking effect of the water-blocking yarn and the water-blocking belt is derived from the water-blocking powder, and the water-blocking property of the water-blocking powder is utilized. Play Water blocking effect, of course, high salinity seawater seriously affects the expansion effect of water blocking powder, the expansion coefficient is close to zero, and the water blocking effect will be seriously affected. The water blocking material preferably used in the technical solution of the embodiment is 80% to 90% by weight of emulsifiable polyol, 10% to 20% by weight of polymer plasticizer, emulsifiable polyol and polymer plasticizer The agent is a fluid state with a small viscosity. When filled, the emulsifiable polyol and the polymer plasticizer are separately filled, the fluid barrier material is easy to fill the gap, and the emulsifiable polyol and the polymer plasticizer are in the gap. Internally mixed and solidified, it has a very good water-blocking effect, and the high-salinity seawater does not affect the expansion effect of the water-blocking material after curing, and meets the water-resistance requirements of deep-sea cables.

As a further improvement of the present invention, the feeding layer 5 is an aluminum tube, and the aluminum tube is formed by an aluminum strip and is formed by argon arc welding. The steps of forming the aluminum strip into an aluminum tube are as follows:

S3: Welding: After the aluminum strip is formed into a tubular structure, the joint joint of the tubular structure is welded by argon arc welding to form an aluminum tube. The aluminum tube after the argon arc welding is good in mechanical properties, high in strength and not easy to be broken;

S4: Aluminum tube drawing: The aluminum tube after welding is drawn by the drawing process, so that the outer diameter of the aluminum tube is smaller than the outer diameter of the armor layer and the thickness of the double aluminum strip, and the aluminum after the drawing The tube forms the above feed layer.

In the technical solution of the embodiment, after the aluminum strip is cleaned on the line, the light unit and the armor layer are integrally placed on the flat aluminum strip, and the aluminum strip is formed into a tubular structure, and the light unit and the armor layer are integrally placed inside the tubular structure, after welding. The aluminum tube is separately drawn, so that the outer diameter of the aluminum tube is smaller than the outer diameter of the armor layer and the thickness of the double aluminum strip. During the process of pulling the aluminum tube, the inner wall of the aluminum tube is extruded into the armor layer. 3. The gap between the wires of the armor layer 3 is further reduced under the action of the pressing force, thereby further improving the longitudinal water blocking capacity and the radial water blocking capacity of the cable.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein. Rather, the broadest scope is consistent with the principles and novel features disclosed herein.

Claims

A feeder deep-sea optical cable includes a light unit, an armor layer stranded outside the light unit, a feed layer coated on the outside of the armor layer, and an insulation layer wrapped on the outside of the feed layer, wherein: The armor layer includes an inner strand and a outer strand, the inner strand is stranded outside the light unit, the outer strand is stranded outside the inner strand, and the feed layer is wrapped outside the outer strand;

The inner strand has a plurality of first stranded wires, the outer strand has a plurality of second stranded wires and a third stranded wire, the second stranded wire and a third stranded wire The wire is alternately disposed, and the wire diameter of the third stranded wire is smaller than the wire diameter of the second stranded wire;

A plurality of first stranded wires are stranded outside the light unit, and the second stranded wire and the third stranded wire are stranded on the first stranded wire, the third stranded metal The wire is stranded on the second stranded wire.
The feed deep sea optical cable according to claim 1, wherein the feed layer is an aluminum tube, and the aluminum tube is formed by an aluminum strip and welded by argon arc welding.
A feeder deep sea cable according to claim 2, wherein the step of forming the aluminum strip into an aluminum tube is as follows:

S1, online cleaning: after the aluminum strip is taken out, it is cleaned on-line to deoxidize and remove impurities on the aluminum strip;

S2, molding: forming the aluminum strip after the online cleaning into a tubular structure;

S3: welding: after the aluminum strip is formed into a tubular structure, the joint of the tubular structure is welded by argon arc welding to form an aluminum tube;

S4: Aluminum tube drawing: The aluminum tube after welding is drawn by the drawing process, so that the outer diameter of the aluminum tube is smaller than the outer diameter of the armor layer and the thickness of the double aluminum strip, and the aluminum after the drawing A tube forms the feed layer.
The feeder deep-sea optical cable according to claim 1, wherein the first stranded wire, the second stranded wire and the third stranded wire have the same twist pitch, and are twisted The direction is the same.
A feeder deep sea optical cable according to claim 1 or 2, wherein: said first The gap between the stranded wire, the second stranded wire, and the third stranded wire is filled with a water blocking material.
A feeder deep sea cable according to claim 5, wherein said water blocking material comprises 80% to 90% by weight of an emulsifiable polyol, and 10% to 20% by weight of the polymer is increased. Plasticizer.
A feeder deep sea cable according to claim 5, wherein the first stranded wire, the second stranded wire and the third stranded wire are all phosphating wires.
A feeder deep sea cable according to claim 5, wherein the wire diameter of the second stranded wire is smaller than the wire diameter of the first stranded wire.
A feeder deep sea cable according to claim 1, wherein the light unit comprises an optical fiber, a stainless steel tube coated on the outer side of the optical fiber, and a gap between the optical fiber and the stainless steel tube is filled with a fiber paste.
A feeder deep sea cable according to claim 1, wherein an adhesive layer is further disposed between the feed layer and the insulating layer.