High-strength large-current-carrying-capacity OPGW optical cable

Abstract

The utility model discloses a high intensity large current-carrying capacity OPGW optical cable, comprising an optical fiber unit, an inner layer armor layer, an aluminium alloy pipe and an outer layer armor layer, the optical fiber unit is arranged in the inner layer armor layer, the inner layer armor layer is arranged in the aluminium alloy pipe, the aluminium alloy pipe is arranged in the outer layer armor layer, a cladding layer is arranged between the optical fiber unit and the inner layer armor layer, and the cladding layer is arranged in the aluminium alloy pipe. A plastic steel layer is arranged between the inner armor layer and the aluminum alloy pipe, a flame retardant layer is arranged between the aluminum alloy pipe and the outer armor layer, the inner armor layer is used for protecting the optical fiber unit, the structural strength of the OPGW optical cable is effectively improved, a carrier for bearing large current-carrying capacity is provided for the OPGW optical cable through the aluminum alloy pipe, and the OPGW optical cable has the advantages that the service life of the OPGW optical cable is prolonged, and the service life of the OPGW optical cable is prolonged. And the outer armor layer further protects the aluminum alloy pipe, so that the overall structural strength of the OPGW optical cable is improved again, and the technical problem that a conventional OPGW optical cable cannot meet the requirements of high mechanical strength and large current-carrying capacity at the same time is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of OPGW optical cables, in particular to a high-strength and high-current-carrying OPGW optical cable. Background Art

[0002] OPGW optical cable, also known as optical fiber composite overhead ground wire, places optical fiber in the ground wire of overhead high-voltage transmission line to form a fiber-optic communication network on the transmission line. This structural form has both ground wire and communication functions and is generally called OPGW optical cable. With the continuous development of my country's power communication technology, optical fiber communication technology has been widely used. As the main carrier of power communication, OPGW optical cable has become the main carrier of power communication system. OPGW optical cable is a carrier that integrates optical fiber communication and ground wire functions.

[0003] The common OPGW optical cable is mainly composed of stainless steel tube optical fiber unit, single or multiple layers of aluminum clad steel wire armor. It is difficult to achieve consistency between high mechanical strength and large current carrying capacity. To achieve high strength, it is inevitable to reduce the current carrying capacity appropriately. Conversely, to achieve large current carrying capacity, it is necessary to reduce the mechanical strength appropriately. However, with the continuous increase of power transmission voltage, from ultra-high voltage 500kV (including 750kV), ±800kV to ultra-high voltage 1000kV, the power transmission energy has increased, and the corresponding technical requirements of OPGW optical cables have also been continuously improved. Therefore, a high-strength and large current carrying OPGW optical cable is needed to meet the demand. Utility Model Content

[0004] The purpose of the utility model is to provide a high-strength and large-current-carrying OPGW optical cable to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-strength and large-current-carrying OPGW optical cable, comprising an optical fiber unit, an inner armor layer, an aluminum alloy tube and an outer armor layer, the optical fiber unit is located inside the inner armor layer, the inner armor layer is located inside the aluminum alloy tube, the aluminum alloy tube is located inside the outer armor layer, a coating layer is arranged between the optical fiber unit and the inner armor layer, a plastic steel layer is arranged between the inner armor layer and the aluminum alloy tube, and a flame retardant layer is arranged between the aluminum alloy tube and the outer armor layer.

[0006] Preferably, the optical fiber unit comprises a plurality of optical fibers and a stainless steel tube, and the stainless steel tube is filled with thixotropic optical fiber grease.

[0007] Preferably, the coating layer is a polyethylene sheath, and the coating layer is arranged on the outer wall of the stainless steel pipe.

[0008] Preferably, the inner armor layer is a single layer or several layers of high-strength fine aluminum-clad steel wire, the diameter of the high-strength fine aluminum-clad steel wire is 1.20mm-2.50mm, and the electrical conductivity of the aluminum-clad steel wire is mainly 20% IACS.

[0009] Preferably, the plastic-steel layer is a plastic-steel tape winding layer, and the plastic-steel layer is wound on the inner armor layer.

[0010] Preferably, the aluminum alloy tube has a thickness of 1.00 mm to 10.00 mm.

[0011] Preferably, the flame retardant layer is a flame retardant polyethylene sheath, and the flame retardant layer is arranged on the outer wall of the aluminum alloy tube.

[0012] Preferably, the outer armor layer is a single layer or multiple layers of aluminum clad steel wire, the wire diameter of the aluminum clad steel wire is 2.25mm~5.00mm, and the electrical conductivity of the aluminum clad steel wire is seven specifications of 14% IACS, 20.3% IACS, 23% IACS, 27% IACS, 30% IACS, 35% IACS, and 40% IACS.

[0013] The beneficial effects of the utility model are:

[0014] In the utility model, the optical fiber unit is protected by the inner armor layer, which effectively improves the structural strength of the OPGW optical cable, and the aluminum alloy tube is used to provide a carrier for the OPGW optical cable with a large current carrying capacity, and the outer armor layer further protects the aluminum alloy tube, which further improves the overall structural strength of the OPGW optical cable, and solves the technical problem that the conventional OPGW optical cable cannot meet the requirements of high mechanical strength and large current carrying capacity at the same time.

[0015] The utility model protects the optical fiber unit through the coating layer, avoids the wear of the inner armor layer on the optical fiber unit, and improves the service life of the optical fiber unit. The inner armor layer is wrapped by the plastic steel layer, which facilitates the sleeve connection of the aluminum alloy tube in the production process and avoids the wear between the armor layer and the aluminum alloy tube. The aluminum alloy tube is protected by the flame retardant layer, and the flame retardant effect of the OPGW optical cable is achieved, while the wear of the outer armor layer on the aluminum alloy tube is prevented, thereby improving the service life of the OPGW optical cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a high-strength and high-current-carrying OPGW optical cable proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the optical fiber unit structure of a high-strength and high-current-carrying OPGW optical cable proposed by the utility model;

[0018] Figure 3This is a schematic diagram of the stainless steel tube structure of a high-strength and high-current-carrying OPGW optical cable proposed by the utility model.

[0019] In the figure: 1. Optical fiber unit; 2. Inner armor layer; 3. Aluminum alloy tube; 4. Outer armor layer; 5. Coating layer; 6. Plastic steel layer; 7. Flame retardant layer; 11. Optical fiber; 12. Stainless steel tube; 13. Optical fiber grease. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-3 A high-strength and high-current-carrying OPGW optical cable comprises an optical fiber unit 1, an inner armor layer 2, an aluminum alloy tube 3 and an outer armor layer 4, the optical fiber unit 1 is located inside the inner armor layer 2, the inner armor layer 2 is located inside the aluminum alloy tube 3, the aluminum alloy tube 3 is located inside the outer armor layer 4, a coating layer 5 is arranged between the optical fiber unit 1 and the inner armor layer 2, a plastic steel layer 6 is arranged between the inner armor layer 2 and the aluminum alloy tube 3, and a flame retardant layer 7 is arranged between the aluminum alloy tube 3 and the outer armor layer 4.

[0022] The inner armor layer 2 protects the optical fiber unit 1, which effectively improves the structural strength of the OPGW optical cable, and the aluminum alloy tube 3 provides a carrier for the OPGW optical cable to carry a large current, and the outer armor layer 4 further protects the aluminum alloy tube 3, which further improves the overall structural strength of the OPGW optical cable, and solves the technical problem that the conventional OPGW optical cable cannot meet the requirements of high mechanical strength and large current. The optical fiber unit 1 is protected by the coating layer 5, and the wear of the optical fiber unit 1 by the inner armor layer 2 is avoided, and the service life of the optical fiber unit 1 is improved. The inner armor layer 2 is wrapped by the plastic steel layer 6, which facilitates the socketing of the aluminum alloy tube 3 during the production process, and avoids the wear between the inner armor layer 2 and the aluminum alloy tube 3. The aluminum alloy tube 3 is protected by the flame retardant layer 7, and the flame retardant effect of the OPGW optical cable is achieved, while the wear of the outer armor layer 4 on the aluminum alloy tube 3 is prevented, thereby improving the service life of the OPGW optical cable.

[0023] Specifically, in this embodiment, the optical fiber unit 1 includes a plurality of optical fibers 11 and a stainless steel tube 12 , and the stainless steel tube 12 is filled with thixotropic optical fiber paste 13 .

[0024] Specifically, in this embodiment, the coating layer 5 is a polyethylene sheath, and the coating layer 5 is arranged on the outer wall of the stainless steel tube 12 .

[0025] Specifically, in this embodiment, the inner armor layer 2 is a single layer or multiple layers of high-strength fine aluminum-clad steel wire, the wire diameter of the high-strength fine aluminum-clad steel wire is 1.20 mm to 2.50 mm, and the electrical conductivity of the aluminum-clad steel wire is mainly 20% IACS.

[0026] Specifically, in this embodiment, the plastic-steel layer 6 is a plastic-steel tape winding layer, and the plastic-steel layer 6 is wound on the inner armor layer 2 .

[0027] Specifically, in this embodiment, the thickness of the aluminum alloy tube 3 is 1.00 mm to 10.00 mm.

[0028] Specifically, in this embodiment, the flame retardant layer 7 is a flame retardant polyethylene sheath, and the flame retardant layer 7 is arranged on the outer wall of the aluminum alloy tube 3 .

[0029] Specifically, in this embodiment, the outer armor layer 4 is a single layer or multiple layers of aluminum clad steel wire, the wire diameter of the aluminum clad steel wire is 2.25 mm to 5.00 mm, and the electrical conductivity of the aluminum clad steel wire is seven specifications of 14% IACS, 20.3% IACS, 23% IACS, 27% IACS, 30% IACS, 35% IACS, and 40% IACS.

[0030] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A high-strength and high-current-carrying OPGW optical cable, comprising an optical fiber unit (1), an inner armor layer (2), an aluminum alloy tube (3) and an outer armor layer (4), characterized in that: The optical fiber unit (1) is located inside the inner armor layer (2), the inner armor layer (2) is located inside the aluminum alloy tube (3), the aluminum alloy tube (3) is located inside the outer armor layer (4), a coating layer (5) is provided between the optical fiber unit (1) and the inner armor layer (2), a plastic steel layer (6) is provided between the inner armor layer (2) and the aluminum alloy tube (3), and a flame retardant layer (7) is provided between the aluminum alloy tube (3) and the outer armor layer (4).

2. The high-strength and high-current-carrying OPGW optical cable according to claim 1, characterized in that: The optical fiber unit (1) comprises a plurality of optical fibers (11) and a stainless steel tube (12), wherein the stainless steel tube (12) is filled with thixotropic optical fiber paste (13).

3. The high-strength and high-current-carrying OPGW optical cable according to claim 1, characterized in that: The coating layer (5) is a polyethylene sheath, and the coating layer (5) is arranged on the outer wall of the stainless steel pipe (12).

4. The high-strength and high-current-carrying OPGW optical cable according to claim 1, characterized in that: The inner armor layer (2) is a single layer or multiple layers of high-strength fine aluminum-clad steel wire, the wire diameter of the high-strength fine aluminum-clad steel wire is 1.20mm-2.50mm, and the electrical conductivity of the aluminum-clad steel wire is mainly 20% IACS.

5. The high-strength and high-current-carrying OPGW optical cable according to claim 1, characterized in that: The plastic-steel layer (6) is a plastic-steel tape winding layer, and the plastic-steel layer (6) is wound on the inner armor layer (2).

6. The high-strength and high-current-carrying OPGW optical cable according to claim 1, characterized in that: The thickness of the aluminum alloy tube (3) is 1.00 mm to 10.00 mm.

7. The high-strength and high-current-carrying OPGW optical cable according to claim 1, characterized in that: The flame retardant layer (7) is a flame retardant polyethylene sheath, and the flame retardant layer (7) is arranged on the outer wall of the aluminum alloy tube (3).

8. The high-strength and high-current-carrying OPGW optical cable according to claim 1, characterized in that: The outer armor layer (4) is a single layer or multiple layers of aluminum clad steel wire, the wire diameter of the aluminum clad steel wire is 2.25mm-5.00mm, and the electrical conductivity of the aluminum clad steel wire is seven specifications of 14% IACS, 20.3% IACS, 23% IACS, 27% IACS, 30% IACS, 35% IACS, and 40% IACS.

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