CN210142532U

CN210142532U - Submarine optical cable

Info

Publication number: CN210142532U
Application number: CN201921405179.3U
Authority: CN
Inventors: 顾春飞; 邱兴宇; 蔡炳余; 谢书鸿; 孙杰; 顾浩然; 刘邓; 蒋峰
Original assignee: Jiangsu Zhongtian Technology Co Ltd; Zhongtian Technology Submarine Cable Co Ltd
Current assignee: Zhongtian Technology Submarine Cable Co Ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-03-13
Anticipated expiration: 2029-08-27

Abstract

The utility model provides a pair of submarine optical cable, including the outer jacket that is located the optical unit of central point position and is located the periphery, the optical unit with be provided with armor, a plurality of conductor layer and a plurality of insulating layer between the outer jacket, the armor sets up the skin of optical unit, the conductor layer with insulating layer quantity is unanimous, the conductor layer with the insulating layer interval set up and with what the mutual butt of armor is the conductor layer, it is outmost the insulating layer with still be provided with the enhancement layer between the outer jacket, the outer distribution of enhancement layer has sensing optical fiber. By adding the sensing optical fiber unit on the basis of the existing submarine optical cable structure, signals such as underwater sound, vibration, impact, temperature change and the like near the submarine optical cable can be monitored through a corresponding detection instrument and a detection system, the data acquisition range and the data acquisition quantity of a submarine observation network system are increased, and the functions of loop transmission of electric energy and information, information acquisition, route monitoring, eavesdropping prevention and the like can be realized.

Description

Submarine optical cable

Technical Field

The utility model relates to an optical cable designs technical field, especially indicates a submarine optical cable.

Background

This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

The seabed observation network is a whole set of observation equipment which is arranged on the seabed for a long time, and is considered as a third platform for observing the earth after the ground and the space by scientists. The submarine observation network comprises a shore base station, a submarine optical cable network (comprising submarine cables, repeaters, splitters and the like), a connection box, an observation instrument equipment platform, various marine observation equipment and the like, wherein the shore base station transmits electric energy to the submarine connection box system in a high-voltage direct current mode through the submarine optical cable network, the submarine connection box system converts high-voltage electricity into medium-low voltage electricity to be supplied to the observation instrument platform and the instrument equipment, observation data are transmitted to the shore base station through the observation instrument equipment platform and the connection box system and then through an optical fiber channel of the submarine optical cable network, and long-term, real-time, high-power, high-capacity and multi-data observation is achieved.

In a long-distance multi-node submarine observation network system, a bipolar submarine optical cable is generally used for realizing loop transmission of electric energy and information between a branch unit and a main node. The existing bipolar submarine optical cable can only realize the transmission of electric energy and information loops in the use process, and cannot monitor the surrounding environment in the use process, so that the observation network detection range is smaller.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for an improved submarine fiber optic cable to extend the monitoring range and content of the submarine observation network system.

The utility model provides a technical scheme does:

the submarine optical cable comprises an optical unit located at the center and an outer protective layer located on the periphery, wherein an armor layer, a plurality of conductor layers and a plurality of insulating layers are arranged between the optical unit and the outer protective layer, the armor layer is arranged on the outer layer of the optical unit, the number of the conductor layers is consistent with that of the insulating layers, the conductor layers and the insulating layers are arranged at intervals and are conductor layers which are mutually abutted to the armor layers, a reinforcing layer is further arranged between the insulating layers and the outer protective layer, and sensing optical fibers are distributed on the outer layer of the reinforcing layer.

Preferably, the reinforcing layer is longitudinally wrapped or wrapped on the periphery of the insulating layer on the outermost layer, and the sensing optical fiber comprises a plurality of sensing optical fiber units.

Preferably, the sensing optical fiber unit is a tight-buffered optical fiber unit or a loose-buffered optical fiber unit.

Preferably, the array of sensing optical fiber units is arranged on the outer layer of the reinforcing layer.

Preferably, the optical unit comprises a stainless steel tube and an optical fiber unit positioned in the stainless steel tube, and the stainless steel tube is filled with water-blocking ointment.

Preferably, the number of cores of the optical fiber is 1-192 cores.

Preferably, the armor layer is stranded on an outer layer of the light unit.

Preferably, the armor layer stranding gap is filled with a water blocking material.

Preferably, the number of the armor layers is 1-4.

Preferably, at least two of the conductor layers are provided, and a semiconductive layer is provided between adjacent conductor layers and the insulating layer.

Compared with the prior art, the submarine optical cable generates scattered light in a reverse direction when light propagates in the optical fiber, wherein the scattered light comprises Rayleigh scattering, Brillouin scattering and Raman scattering. The vibration of the submarine cable can be detected by utilizing the Rayleigh scattering principle and adopting a phase-sensitive optical time domain reflectometer step-by-step optical fiber sensing technology; the Raman scattering and the Brillouin scattering are used for measuring temperature, wherein the Brillouin scattering adopts sensing optical fibers as sensors, large-power detection can be carried out, meanwhile, the Brillouin scattering is sensitive to strain, and the temperature change and the stress change of the submarine cable can be monitored by adopting a stimulated Brillouin scattering technology. Signals such as underwater sound, vibration, impact, temperature change and the like in a certain range near the bipolar submarine optical cable route can be monitored through a corresponding detecting instrument and a corresponding detecting system, the data acquisition range and the data acquisition quantity of the submarine observation network system are increased, meanwhile, the sensing optical fiber unit is arranged on the outer layer of the cable core, the action that the bipolar submarine optical cable is manually stripped can be monitored, and the communication optical fiber can be effectively prevented from being eavesdropped. The bipolar submarine optical cable can realize the functions of loop transmission of electric energy and information, information acquisition, route monitoring, eavesdropping prevention and the like.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of an undersea optical cable according to an embodiment of the present invention.

Description of reference numerals:

submarine optical cable	100
		Light unit	10
Stainless steel pipe	11
		Optical fiber unit	12
Armor layer	20
		Conductive layer	30
Inner conductor	31
		Outer conductor	32
Insulating layer	40
		Inner insulating layer	41
Outer insulating layer	43
		Semi-conducting layer	45
Reinforcing layer	60
		Sensing optical fiber	61
Sensing optical fiber unit	611
		Outer protective layer	80

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and detailed description. In addition, the features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the invention, and the described embodiments are merely some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the scope protected by the embodiments of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention belong. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the invention.

Referring to fig. 1, an undersea optical fiber cable 100 for connecting underwater devices and monitoring submarine cable routing includes an optical unit 10, an armor layer 20, a plurality of conductor layers 30, a plurality of insulation layers 40, a reinforcing layer 60, and an outer sheath 80. The optical unit 10 is located at the center of the submarine optical cable 100, the armor 20 is twisted around the optical unit 10, the number of the conductor layers 30 and the number of the insulating layers 40 are the same, and the conductor layers 30 are spaced apart from each other, and the conductor layers 30 abut against the armor 20 on the inner side. The reinforcing layer 60 is longitudinally wrapped around the outermost insulating layer 40, and the outer sheath 80 is located on the outermost circumference of the submarine optical cable 100.

In an embodiment, the optical unit 10 is located at a central position of the submarine optical cable 100, the optical unit 10 includes a stainless steel tube 11 and an optical fiber unit 12 located in the stainless steel tube 11, and a high-performance water-blocking ointment is filled in the stainless steel tube 11 for improving the water-blocking performance of the submarine optical cable 100. In one embodiment, the stainless steel tube 11 is formed by welding the stainless steel tube 11 without seams, the number of optical fiber cores in the optical fiber unit 12 is 1-192, and it can be understood that the specific number of cores of the optical fiber unit 12 placed in the stainless steel tube 11 can be set according to specific information transmission requirements.

The armor layer 20 is twisted around the optical unit 10, in an embodiment, the armor layer 20 is formed by twisting steel wires, a water blocking material is further filled in a gap where the armor layer 20 is twisted, and the armor layer 20 is provided in 2 layers. In other embodiments, the armor 20 may also be formed by twisting non-metal reinforcing materials or other equivalent reinforcing materials, and the number of layers of the armor 20 may be set to 1-4.

The conductive layer 30 and the insulating layer 40 are disposed at an interval, and the conductive layer 30 is disposed at least in two layers. In one embodiment, the conductive layer 30 and the insulating layer 40 are respectively disposed in two layers, the conductive layer 30 is respectively an inner conductor 31 and an outer conductor 32, and the insulating layer 40 is divided into an inner insulating layer 41 and an outer insulating layer 43. In one embodiment, the conductive layer 30 and the insulating layer 40 are an inner conductor 31, an inner insulating layer 41, an outer conductor 32, and an outer insulating layer 43, respectively, from the inside to the outside. The inner conductor 31 is welded into a tube by adopting conductor strip material pre-deformation; the outer conductor 32 is formed by longitudinal wrapping of a conductor or seam-free welding of the conductor, and the conductor layer 30 is made of copper, aluminum or other equivalent materials; the inner insulating layer 41 and the outer insulating layer 43 are formed by extrusion molding, and the inner insulating layer 41 and the outer insulating layer 43 are made of polyethylene, polypropylene, polyvinyl chloride, ethylene propylene rubber or other equivalent materials.

A semiconductive layer 45 is provided between the conductive layer 30 and the insulating layer 40, which are provided adjacent to each other, and in one embodiment, the semiconductive layer 45 is provided in three layers, and the semiconductive layers 45 are provided between the inner conductor 31 and the inner insulating layer 41, between the inner insulating layer 41 and the outer conductor 32, and between the outer conductor 32 and the outer insulating layer 42. The semiconductive layer 45 is formed by extrusion molding of a semiconductive material, which is a semiconductive polyethylene material, and the semiconductive layer 45 serves to block the insulating layer 40 from the conductor layer 30 and to homogenize an electric field, preventing concentration of the electric field in the conductor layer 30 due to defects such as burrs, sharp corners, and the like. In other embodiments, the semi-conductive layer 45 can be wrapped or longitudinally formed by a semi-conductive tape.

The reinforcing layer 60 is wrapped or longitudinally arranged on the outer periphery of the outer insulating layer 43, in one embodiment, the reinforcing layer 60 is made of a steel-plastic composite tape material, and in other embodiments, the reinforcing layer 60 may also be made of a steel tape or other equivalent materials. In an embodiment, sensing optical fibers 61 are further distributed on the outer periphery of the reinforcing layer 60, the sensing optical fibers 61 include a plurality of groups of sensing optical fiber units 611, the sensing optical fiber units 611 are tightly-packed optical fiber units, and the sensing optical fiber units are arranged in an array on the outer periphery of the reinforcing layer 60. In other embodiments, the sensing fiber 61 may also be a loose-tube fiber unit. The sensing fiber unit 611 contains a plurality of fibers therein.

In one embodiment, the outer sheath 80 is extruded from a polyethylene material. In other embodiments, the material of the outer sheath 80 may also be polypropylene, polyvinyl chloride, ethylene propylene rubber, or other equivalent materials.

In other embodiments, the submarine optical cable 100 may be formed by adding steel wires, non-metallic reinforcements, or other equivalent reinforcements to the outer layer to form an armor layer, so as to act as other cable types on different water depths and seas.

The utility model provides an undersea optical cable 100, because light when propagating in optic fibre, produces the scattered light in the opposite direction, including rayleigh scattering, brillouin scattering and raman scattering. The vibration of the submarine cable can be detected by utilizing the Rayleigh scattering principle and adopting a phase-sensitive optical time domain reflectometer step-by-step optical fiber sensing technology; the Raman scattering and the Brillouin scattering are used for measuring temperature, wherein the Brillouin scattering adopts sensing optical fibers as sensors, large-power detection can be carried out, meanwhile, the Brillouin scattering is sensitive to strain, and the temperature change and the stress change of the submarine cable can be monitored by adopting a stimulated Brillouin scattering technology. Signals such as underwater sound, vibration, impact, temperature change and the like in a certain range near the route of the bipolar submarine optical cable 100 can be monitored through a corresponding detecting instrument and a corresponding detecting system, the data acquisition range and the data acquisition quantity of a submarine observation network system are increased, meanwhile, the sensing optical fiber unit 611 is arranged on the outer layer of the cable core, the manual stripping action of the bipolar submarine optical cable 100 can be monitored, and the communication optical fiber can be effectively prevented from being intercepted. The bipolar submarine optical cable 100 can realize the functions of loop transmission of electric energy and information, information acquisition, route monitoring, eavesdropping prevention and the like.

The above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention and are not limited, and although the embodiments of the present invention have been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of the embodiments of the present invention may be made without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an optical cable at sea bottom, is including being located the optical unit of central point position and being located the outer jacket of periphery, the optical unit with be provided with armor, a plurality of conductor layer and a plurality of insulating layer between the outer jacket, its characterized in that: the armor layer is arranged on the periphery of the optical unit, the number of the conductor layers is consistent with that of the insulation layers, the conductor layers are arranged at intervals with the insulation layers and are mutually abutted to the armor layer, a reinforcing layer is further arranged between the outermost insulation layer and the outer protective layer, and sensing optical fibers are distributed on the periphery of the reinforcing layer.

2. The undersea optical cable of claim 1, wherein: the reinforced layer is longitudinally wrapped or wrapped on the periphery of the outermost insulating layer, and the sensing optical fiber comprises a plurality of sensing optical fiber units.

3. The undersea optical cable of claim 2, wherein: the sensing optical fiber unit is a tightly-packed optical fiber unit or a loose-sleeve optical fiber unit.

4. The undersea optical cable of claim 1, wherein: the sensing optical fiber unit array is arranged on the outer layer of the reinforcing layer.

5. The undersea optical cable of claim 1, wherein: the optical unit comprises a stainless steel pipe and an optical fiber unit positioned in the stainless steel pipe, and water-blocking ointment is filled in the stainless steel pipe.

6. The undersea optical cable of claim 5, wherein: the number of the cores of the optical fiber is 1-192 cores.

7. The undersea optical cable of claim 1, wherein: the armor layer is arranged on the outer layer of the light unit in a twisted mode.

8. The undersea optical cable of claim 7, wherein: and a water blocking material is filled in the stranded gap of the armor layer.

9. The undersea optical cable of claim 8, wherein: the number of the armor layers is 1-4.

10. The undersea optical cable of claim 1, wherein: the conductor layer is provided with two at least, is provided with the semi-conducting layer between adjacent conductor layer and the insulating layer.