Double-layer armored submarine optical cable

Abstract

The utility model discloses a double-layer armored submarine optical cable in the field of submarine optical cables, which comprises an optical unit, an elastic buffer unit is arranged on the outer side of the optical unit, the elastic buffer unit comprises an inner supporting tube and an outer supporting tube, the inner supporting tube and the outer supporting tube are divided into a plurality of cavities with the same volume through a plurality of connecting pieces, and the connecting pieces are arranged in the cavities. A plurality of buffer pieces are arranged in the cavity, a first armor layer and a second armor layer are correspondingly arranged on the outer side of the elastic buffer unit, an inner sheath is arranged between the first armor layer and the second armor layer, a water-blocking tape is wrapped on the outer side of the second armor layer, and an outer sheath is arranged on the outer side of the water-blocking tape. The submarine optical cable can cope with a complex submarine environment, and the strength and the structural stability of the submarine optical cable are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of submarine optical cables, and particularly relates to a double-layer armored submarine optical cable. Background Art

[0002] As a large-capacity, efficient communication medium, optical cable is the foundation and first choice of communication systems. Optical cable has penetrated into all aspects of social development. Submarine optical cable has become the best way to connect islands with the mainland, islands with islands, and continents with its stable communication quality, good confidentiality, and anti-interference characteristics.

[0003] The laying environment of submarine optical cables is complex. During use, they may be damaged by shark bites, sand and gravel impacts, and seabed vibrations. Once the optical cable is damaged, the damaged area will slowly expand over time, affecting the inside of the optical cable and ultimately affecting the light transmission efficiency of the optical fiber. Utility Model Content

[0004] The purpose of the utility model is to provide a double-layer armored submarine optical cable, which can cope with complex laying environments and effectively improve the strength and structural stability of the submarine optical cable.

[0005] The purpose of the utility model is achieved as follows: a double-layer armored submarine optical cable, comprising an optical unit, an elastic buffer unit is arranged on the outside of the optical unit, the elastic buffer unit comprises an inner support tube and an outer support tube, the inner support tube and the outer support tube are divided into a plurality of cavities of equal volume by a plurality of connectors, a plurality of buffers are arranged in the cavity, a first armor layer and a second armor layer are arranged corresponding to the outside of the elastic buffer unit, an inner sheath is arranged between the first armor layer and the second armor layer, a water blocking tape is wrapped around the outside of the second armor layer, and an outer sheath is arranged on the outside of the water blocking tape.

[0006] Compared with the prior art, the beneficial effects of the utility model are: when the optical cable is squeezed, a buffering force can be generated through the elastic deformation of the outer support tube and the inner support tube, thereby avoiding the optical unit from being squeezed and damaged, which can effectively improve the compressive resistance of the cable and increase the service life of the optical cable in a complex working environment; the space between the outer support tube and the inner support tube is divided into multiple cavities, and multiple buffer parts are filled in the cavity, which can make the elastic buffer unit produce elastic deformation when it is stretched and recover when it is not stressed, so that the optical unit at the center is not affected by sand and gravel impact or seabed vibration; the design of the outer sheath, the first armor layer, the inner sheath and the second armor layer stacked in sequence can ensure that the optical cable has sufficient strength and support while taking into account its soft performance, greatly improving the strength of the optical cable and effectively avoiding damage to the optical unit caused by shark bites.

[0007] As a further improvement of the utility model, the cavity is also filled with water-blocking yarn or water-blocking ointment.

[0008] As a further improvement of the present invention, the support tube, the outer support tube and the connecting piece are made of insulating material in one piece.

[0009] As a further improvement of the present invention, the second armor layer is coated with low-temperature modified asphalt.

[0010] As a further improvement of the utility model, the outer sheath is coated with low-temperature modified asphalt.

[0011] As a further improvement of the present invention, the buffer is made of silicon carbide material and has a cylindrical structure.

[0012] As a further improvement of the present invention, the first armor layer and the second armor layer are both formed by spirally winding galvanized steel wires.

[0013] As a further improvement of the present invention, the diameter of the galvanized steel wire of the second armor layer is greater than the diameter of the galvanized steel wire of the first armor layer.

[0014] As a further improvement of the present invention, the armoring direction of the second armor layer is opposite to the armoring direction of the first armor layer.

[0015] As a further improvement of the present invention, the optical unit includes a stainless steel tube and an optical fiber, and fiber paste is filled between the optical fiber and the stainless steel tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure of the elastic buffer sheet.

[0018] Among them, 1 optical unit, 101 stainless steel tube, 102 optical fiber, 103 fiber paste, 2 elastic buffer unit, 201 inner support tube, 202 outer support tube, 203 connector, 204 cavity, 205 buffer, 3 first armor layer, 4 second armor layer, 5 inner sheath, 6 water blocking tape, 7 outer sheath. DETAILED DESCRIPTION Embodiment 1

[0019] like Figure 1 and 2As shown, a double-layer armored submarine optical cable includes an optical unit 1, the optical unit 1 includes a stainless steel tube 101 and an optical fiber 102, and a fiber paste 103 is filled between the optical fiber 102 and the stainless steel tube 101; an elastic buffer unit 2 is arranged outside the optical unit 1, and the elastic buffer unit 2 includes an inner support tube 201 and an outer support tube 202, and the inner support tube 201 and the outer support tube 202 are divided into six equal-volume cavities 204 by six connectors 203, and three buffers 205 made of silicon carbide material in a cylindrical structure are arranged in each cavity 204. Preferably, the support tube, the outer support tube 202 and the connector 203 are made of insulating material in one piece; In order to improve the water-blocking effect of the optical cable, the cavity 204 is also filled with water-blocking yarn or water-blocking grease; the first armor layer 3 and the second armor layer 4 are arranged on the outer side of the corresponding elastic buffer unit 2, and preferably, the second armor layer 4 is coated with low-temperature modified asphalt; the first armor layer 3 and the second armor layer 4 are both formed by spirally winding galvanized steel wire, and the armoring direction of the second armor layer 4 is opposite to the armoring direction of the first armor layer 3; the diameter of the galvanized steel wire of the second armor layer 4 is larger than the diameter of the galvanized steel wire of the first armor layer 3; an inner sheath 5 is arranged between the first armor layer 3 and the second armor layer 4, a water-blocking tape 6 is wrapped around the outer side of the second armor layer 4, and an outer sheath 7 is arranged on the outer side of the water-blocking tape 6. Embodiment 2

[0020] The difference between this embodiment and the first embodiment is that low-temperature modified asphalt is coated on the outer sheath 7 .

[0021] The advantages of the utility model are as follows: when the optical cable is impacted by sand and gravel or the seabed vibrates, the elastic buffer unit 2 can prevent the cable core from being overly compressed and causing damage to the optical fiber 102. At the same time, the cable core is supported by the elastic buffer unit 2 to prevent the optical unit 1 from being damaged by friction with the first armor layer 3; low-temperature modified asphalt is coated on the second armor layer 4 or the outer sheath 7 to ensure that the asphalt does not become brittle or crack under extremely low temperature conditions; combined with the water-blocking tape 6 wrapped around the outside of the second armor layer 4 and the water-blocking yarn or water-blocking paste in the cavity 204, the optical cable has a higher longitudinal water-blocking function; the filling strip is composed of silicon carbide, which is light in weight, flexible and has an insulating effect.

[0022] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A double-layer armored submarine optical cable, characterized in that: It includes an optical unit, an elastic buffer unit is arranged on the outside of the optical unit, the elastic buffer unit includes an inner supporting tube and an outer supporting tube, the inner supporting tube and the outer supporting tube are divided into a plurality of cavities of equal volume by a plurality of connecting parts, a plurality of buffer parts are arranged in the cavities, a first armor layer and a second armor layer are arranged on the outside of the elastic buffer unit corresponding to the first armor layer and the second armor layer, an inner sheath is arranged between the first armor layer and the second armor layer, a water-blocking tape is wrapped around the outside of the second armor layer, and an outer sheath is arranged on the outside of the water-blocking tape.

2. A double-layer armored submarine optical cable according to claim 1, characterized in that: The cavity is also filled with water-blocking yarn or water-blocking ointment.

3. A double-layer armored submarine optical cable according to claim 1, characterized in that: The support tube, the outer support tube and the connecting piece are made of insulating material in one piece.

4. A double-layer armored submarine optical cable according to claim 1, characterized in that: The second armor layer is coated with low-temperature modified asphalt.

5. A double-layer armored submarine optical cable according to claim 1, characterized in that: The outer sheath is coated with low-temperature modified asphalt.

6. A double-layer armored submarine optical cable according to claim 1, characterized in that: The buffer is made of silicon carbide material and is made into a cylindrical structure.

7. A double-layer armored submarine optical cable according to claim 1, characterized in that: The first armor layer and the second armor layer are both formed by spirally winding galvanized steel wires.

8. A double-layer armored submarine optical cable according to claim 7, characterized in that: The diameter of the galvanized steel wire of the second armor layer is greater than the diameter of the galvanized steel wire of the first armor layer.

9. A double-layer armored submarine optical cable according to claim 8, characterized in that: The armoring direction of the second armor layer is opposite to the armoring direction of the first armor layer.

10. A double-layer armored submarine optical cable according to any one of claims 1 to 9, characterized in that: The optical unit comprises a stainless steel tube and an optical fiber, and fiber paste is filled between the optical fiber and the stainless steel tube.

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