CN213182150U - Ultra-low loss optical fiber composite overhead ground wire - Google Patents

Abstract

The utility model discloses an ultra-low loss optical fiber composite overhead ground wire, which comprises an optical fiber unit and an aluminum alloy steel cable core, wherein the optical fiber unit is arranged in the cavity of the aluminum alloy steel cable core, a plurality of first stranded wire layers in an annular array are arranged on the outer wall of the aluminum alloy steel cable core, a first isolation layer is arranged on one surface of the first stranded wire layer, which is far away from the aluminum alloy steel cable core, a plurality of second stranded wire layers in an annular array are arranged on one surface of the first isolation layer, a second isolation layer is arranged on the outer wall of the second stranded wire layer, the two layers of isolation layers are utilized to better protect the optical fiber composite overhead ground wire, damage is prevented, safety is effectively improved, meanwhile, the two layers of stranded wire layers adopt a double-layer central tube structure, so that the optical fiber unit is ensured to control the surplus length of an appropriate space, transmission performance and speed are improved, and the capacity of resisting external temperature is better, is safe and reliable for a long time.

Description

Ultra-low loss optical fiber composite overhead ground wire

Technical Field

The utility model belongs to the technical field of the compound overhead ground wire of optic fibre, specifically be the compound overhead ground wire of ultra-low loss optic fibre.

Background

An optical fiber composite overhead ground wire opgwoptical power group waveguide, also called an optical fiber overhead ground wire, is a ground wire of a power transmission line that includes an optical fiber unit for communication. The lightning protection wire has 2 functions, one is used as a lightning protection wire of a power transmission line and provides shielding protection for lightning protection discharge resistance of the power transmission line; the other is that the optical fiber compounded in the ground wire is used as a medium for transmitting optical signals, and can transmit audio, video, data and various control signals to construct a multi-channel broadband communication network. The OPGW optical cable generally includes a framework type, a central tube type, a layer stranding type, and the like. The optical fiber composite overhead ground wire (opgw) optical cable is used as a shielding wire and a lightning protection wire of a power transmission line, provides protection for lightning-proof discharge of a power wire, plays a role in shielding when the power transmission line is short-circuited, and reduces mutual interference of short-circuit current to a power grid and a communication network. Meanwhile, through the optical fiber compounded in the ground wire, audio, video, data and various control signals can be transmitted, and multi-channel broadband communication is carried out. In order to realize the functions, different optical cable structural designs are adopted by various manufacturers, so that the optical cable and the ground wire are organically combined together to fully play respective functions

With the development of the times and the increasingly widespread application of optical fiber composite overhead ground wires, some areas with harsh environments such as: in hot deserts, tropical rainforests or plateau areas with large temperature differences, circuit cables can be used after being laid, but in the prior art, the use of the optical fiber composite overhead ground wire in the places can not avoid unnecessary energy and information loss in the way, thereby reducing the communication capacity, shortening the communication distance and increasing the cost. Therefore, it is necessary to improve the structure of the optical fiber composite overhead ground wire, and to provide an ultra-low loss optical fiber composite overhead ground wire, which facilitates better solution of the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problems proposed above, an ultra-low loss optical fiber composite overhead ground wire is provided.

The utility model adopts the technical scheme as follows:

the ultra-low loss optical fiber composite overhead ground wire comprises an optical fiber unit and an aluminum alloy cable core, wherein the optical fiber unit is arranged in a cavity of the aluminum alloy cable core, a plurality of first stranded wire layers in an annular array are arranged on the outer wall of the aluminum alloy cable core, a first isolation layer is arranged on one surface, away from the aluminum alloy cable core, of each first stranded wire layer, a plurality of second stranded wire layers in an annular array are arranged on one surface, away from the first stranded wire layers, of each first stranded wire layer, and a second isolation layer is arranged on the outer wall of each second stranded wire layer.

In a preferred embodiment, the first stranded wire layer is composed of metal stranded wires and hollow aluminum alloy steel, the number of the hollow aluminum alloy steel is at least 6, the metal stranded wires are 20SA aluminum-clad steel wires, and the metal stranded wires are arranged inside the hollow aluminum alloy steel.

In a preferred embodiment, the first insulation layer is composed of an insulation tube, and the insulation tube is tightly attached to the outer surface of the first twisted wire layer.

In a preferred embodiment, the second stranded wire layer is composed of outer stranded wires and hollow steel pipes, the number of the hollow steel pipes is at least 6, the outer stranded wires are 27SA aluminum-clad steel wires, and the outer stranded wires are arranged inside the hollow steel pipes.

In a preferred embodiment, the material of second insulating layer is stainless steel, and the outer wall fixed mounting of second insulating layer has the clamp, the both sides arch of clamp has seted up the fixed orifices, and threaded mounting has the gim peg on the fixed orifices.

In a preferred embodiment, a gap is left between the first stranded wire layer and the second stranded wire layer, and the gap is filled with ointment.

In conclusion, due to the adoption of the technical scheme, the utility model has the advantages that the optical fiber composite overhead ground wire is better protected by utilizing the two isolation layers, the damage is prevented, the safety is effectively improved, and meanwhile, the two stranded wire layers adopt the structure of the double-layer central pipe, so that the transmission performance and the transmission speed are improved, and the double-layer stranded wire has better capability of resisting the external temperature and is safe and reliable for a long time.

1. The utility model discloses in, the structure of double-deck center tube has been adopted on two-layer stranded conductor layer, thereby guaranteed that optic fibre unit still another suitable space controls the optic fibre extra length, thereby it is in a suitable interval to have kept optic fibre composite overhead earth wire temperature, and further improve its information transmission's performance, double-layer stranded conductor can protect optic fibre unit not receive external force better and destroy, when the short circuit, because double-layer stranded conductor all uses the aluminium clad steel wire, the current capacity has been improved effectively, and then better heat resistance has been had, thereby the condition of short circuit burnout circuit prevents to appear, long-term safe and reliable.

2. The utility model discloses in, the aluminium package copper wire is the air wire who is constituteed by aluminium package steel wire is strengthened core and duralumin wire transposition, aluminium package steel core aluminum stranded conductor compares with ordinary steel core aluminum stranded conductor, stranded conductor light in weight 5%, the current-carrying capacity improves 2 ~ 3%, the sag reduces 1 ~ 2%, power loss reduces 4 ~ 6%, and corrosion resistance is good, long service life, simple structure, erect and maintain convenient, transmission capacity is big, and then improved the transmission performance of compound overhead earth wire of optic fibre.

Drawings

Fig. 1 is the structure schematic diagram of the utility model:

fig. 2 is an enlarged schematic view of the structure at the position a in the present invention.

The labels in the figure are: the optical fiber cable comprises 1-an optical fiber unit, 2-an aluminum alloy steel cable core, 3-a first stranded wire layer, 4-a first isolation layer, 5-a second stranded wire layer, 6-a second isolation layer, 7-a metal stranded wire, 8-hollow aluminum alloy steel, 9-an outer layer stranded wire, 10-a hollow steel pipe, 11-a hoop and 12-a fixing bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1-2, an ultra-low loss optical fiber composite overhead ground wire comprises an optical fiber unit 1 and an aluminum alloy steel cable core 2, wherein the optical fiber unit 1 is arranged in a cavity of the aluminum alloy steel cable core 2, a plurality of first stranded wire layers 3 in an annular array are arranged on the outer wall of the aluminum alloy steel cable core 2, a first isolation layer 4 is arranged on one surface of each first stranded wire layer 3, which is far away from the aluminum alloy steel cable core 2, a plurality of second stranded wire layers 5 in an annular array are arranged on one surface of each first isolation layer 4, which is far away from the first stranded wire layer 3, a second isolation layer 6 is arranged on the outer wall of each second stranded wire layer 2, the two stranded wire layers adopt a double-layer central tube structure, so that a proper space is reserved for controlling the excess length of an optical fiber in the optical fiber unit 1, the temperature of the optical fiber composite overhead ground wire is kept in a proper interval, the information transmission performance of the optical fiber, during short circuit, because the double-layer stranded wires all use aluminum-clad steel wires, the current capacity is effectively improved, and better heat resistance is further achieved, the situation that a circuit is burnt out due to short circuit is prevented, the long-term safety and reliability are realized, the first stranded wire layer 3 is composed of metal stranded wires 7 and hollow aluminum alloy steel 8, the number of the hollow aluminum alloy steel 8 is at least 6, the metal stranded wires 7 are 20SA aluminum-clad steel wires, the metal stranded wires 7 are arranged inside the hollow aluminum alloy steel 8, the first isolation layer 4 is composed of insulating pipes, the insulating pipes are tightly attached to the outer surface of the first stranded wire layer 3, the second stranded wire layer 5 is composed of outer stranded wires 9 and hollow steel pipes 10, the number of the hollow steel pipes 10 is at least 6, the outer stranded wires 9 are 27SA aluminum-clad steel wires, the aluminum-clad steel wires are overhead conductors formed by twisting of aluminum-clad steel wires and hard aluminum wires, and compared with common steel-cored aluminum-clad steel wires, stranded conductor light in weight 5%, the current-carrying capacity improves 2 ~ 3%, the sag reduces 1 ~ 2%, power loss reduces 4 ~ 6%, and corrosion resistance is good, long service life, moreover, the steam generator is simple in structure, erect and maintain conveniently, transmission capacity is big, and then the transmission performance of compound overhead earth wire of optic fibre has been improved, and outer stranded conductor 9 sets up the inside at hollow steel pipe 10, the material of second isolated layer 6 is the stainless steel, and the outer wall fixed mounting of second isolated layer 6 has clamp 11, the fixed orifices has been seted up to clamp 11's both sides arch, and threaded mounting has gim peg 12 on the fixed orifices, first stranded conductor layer 3 leaves the space between each other with second stranded conductor layer 5, and the space intussuseption is filled with the oleamen.

The working principle is as follows: in this application, the structure of double-deck center tube has been adopted on two-layer stranded conductor layer, thereby guaranteed that optical fiber unit 1 still another suitable space controls the optic fibre extra length, thereby it is in a suitable interval to have kept the compound overhead earth wire temperature of optic fibre, and further improve its information transmission's performance, double-layer stranded conductor can protect optical fiber unit not receive external force better and destroy, when the short circuit, because double-layer stranded conductor all uses the aluminium-clad steel wire, the current capacity has been improved effectively, and then better heat resistance has been had, thereby the condition of circuit is burnt out to the short circuit that prevents to appear, long-term safe and reliable.

In this application, the aluminium-clad steel wire is the air wire who is formed by aluminium-clad steel wire is the enhancement core and the transposition of duralumin wire, and aluminium-clad steel core aluminum stranded conductor compares with ordinary steel core aluminum stranded conductor, and stranded conductor light in weight 5%, current-carrying capacity improves 2 ~ 3%, and the sag reduces 1 ~ 2%, and power loss reduces 4 ~ 6%, and corrosion resistance is good, long service life, simple structure, erect and maintain the convenience, transmission capacity is big, and then has improved the transmission performance of compound overhead earth wire of optic fibre.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. Ultra-low loss optical fiber composite overhead ground wire comprises an optical fiber unit (1) and an aluminum alloy steel cable core (2), and is characterized in that: the optical fiber unit (1) is arranged in a cavity of the aluminum alloy steel cable core (2), a plurality of first stranded wire layers (3) in an annular array are arranged on the outer wall of the aluminum alloy steel cable core (2), one side, away from the aluminum alloy steel cable core (2), of each first stranded wire layer (3) is provided with a first isolation layer (4), one side, away from the first stranded wire layers (3), of each first isolation layer (4) is provided with a plurality of second stranded wire layers (5) in an annular array, and the outer wall of each second stranded wire layer (5) is provided with a second isolation layer (6).

2. The ultra-low loss optical fiber composite overhead ground wire of claim 1, wherein: the first stranded wire layer (3) is composed of metal stranded wires (7) and hollow aluminum alloy steel (8), the number of the hollow aluminum alloy steel (8) is at least 6, the metal stranded wires (7) are 20SA aluminum-clad steel wires, and the metal stranded wires (7) are arranged inside the hollow aluminum alloy steel (8).

3. The ultra-low loss optical fiber composite overhead ground wire of claim 1, wherein: the first isolation layer (4) is composed of an insulating pipe, and the insulating pipe is tightly attached to the outer surface of the first stranded wire layer (3).

4. The ultra-low loss optical fiber composite overhead ground wire of claim 1, wherein: the second stranded wire layer (5) comprises outer stranded wires (9) and hollow steel pipes (10), and the quantity of hollow steel pipes (10) is 6 at least, outer stranded wires (9) are 27SA aluminium clad steel wires, and outer stranded wires (9) set up the inside at hollow steel pipes (10).

5. The ultra-low loss optical fiber composite overhead ground wire of claim 1, wherein: the material of second insulating layer (6) is the stainless steel, and the outer wall fixed mounting of second insulating layer (6) has clamp (11), the fixed orifices has been seted up to the both sides arch of clamp (11), and threaded mounting has gim peg (12) on the fixed orifices.

6. The ultra-low loss optical fiber composite overhead ground wire of claim 1, wherein: a gap is reserved between the first stranded wire layer (3) and the second stranded wire layer (5), and ointment is filled in the gap.

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