CN220252917U - Optical fiber composite overhead phase wire - Google Patents

Abstract

The utility model provides an optical fiber composite overhead phase wire. The optical fiber composite overhead phase line comprises an optical fiber assembly, a protective layer and a conductor layer which are sequentially arranged from inside to outside, wherein the optical fiber assembly comprises: the protection unit is of a cylindrical structure with a through hole; a reinforcing member located in the through hole; the optical fiber units are located in the through holes and are stranded on the periphery of the reinforcing member, and each optical fiber unit comprises a plurality of optical fibers and a flexible protection tube located on the periphery of each optical fiber. The technical scheme of the utility model solves the problems of large optical fiber attenuation caused by the increase of the number of optical fibers of the existing optical fiber composite overhead phase line and the loss of the whole mechanical property and the electric property caused by replacing the aluminum-clad steel monofilament with a steel pipe optical unit.

Description

Optical fiber composite overhead phase wire

Technical Field

The utility model relates to the technical field of overhead transmission, in particular to an optical fiber composite overhead phase line.

Background

The optical fiber composite overhead phase line OPPC (Opticalphase Conductor, OPPC for short) has the dual functions of power transmission and communication, and can provide an optical fiber channel for power distribution network construction. The combination of the power line and the optical fiber network is effectively enhanced, and the intelligent degree of the power grid is improved.

At present, most of power optical fiber communication systems in China adopt OPPC with more than 24 cores, 24-core optical fibers are the lowest configuration, and if the number of the cores of the optical fibers is increased on the basis, the optical fibers are hindered by certain factors. For example, when the outer diameter of the steel tube optical fiber unit is fixed, the excessive fiber cores are put into the steel tube optical fiber unit, and the fiber cores are not enough space for the fiber to bend so as to generate the residual length of the fiber, so that the fibers are mutually extruded on the premise that the residual length is kept unchanged. The optical fiber receives lateral pressure, so that microbending loss is increased, and transmission performance is affected; the long-term stressing of the fiber in its non-relaxed state will affect the long-term life of the fiber.

The patent application No. 201220110150.4 discloses a high core number optical fiber composite overhead phase wire in a 220kV voltage class line, which replaces one aluminum clad steel wire with one steel tube optical unit, the number of which is increased from one to two, in order to double the communication capacity. However, the original aluminum-clad steel wire is replaced by the optical unit, so that the overall performance loss of the optical cable can be caused, the mechanical performance and the electrical performance can not meet the overall requirements of the original circuit, and the mode of replacing the aluminum-clad steel monofilament can increase the number of the optical units of the steel pipe to 3 at most, if the optical units are continuously increased, the stress and the attenuation of the optical fiber can be increased, and the requirements of circuit communication can not be met.

Disclosure of Invention

The utility model mainly aims to provide an optical fiber composite overhead phase wire, which solves the problems of optical fiber attenuation and overall mechanical performance and electrical performance loss caused by replacing aluminum-clad steel monofilaments with steel tube optical units due to the increase of the number of optical fibers of the existing optical fiber composite overhead phase wire.

In order to achieve the above object, the present utility model provides an optical fiber composite overhead phase wire, comprising an optical fiber assembly, a protective layer and a conductor layer sequentially arranged from inside to outside, wherein the optical fiber assembly comprises: the protection unit is of a cylindrical structure with a through hole; a reinforcing member located in the through hole; the optical fiber units are located in the through holes and are stranded on the periphery of the reinforcing member, and each optical fiber unit comprises a plurality of optical fibers and a flexible protection tube located on the periphery of each optical fiber.

Further, the optical fiber assembly further includes a heat insulating layer located at an outer circumference of the plurality of optical fiber units, the heat insulating layer being located between the plurality of optical fiber units and the protection unit.

Further, the heat insulating layer is formed of a mica tape wrapped around the outer circumferences of the plurality of optical fiber units.

Further, the flexible protection tube is a loose tube; alternatively, the protection unit is made of a steel pipe or an aluminum pipe.

Further, the protective layer comprises a plurality of aluminum-clad steel wires stranded on the periphery of the optical fiber assembly, and two adjacent aluminum-clad steel wires are attached to each other.

Further, the cross section of the aluminum-clad steel wire is fan-shaped.

Further, the aluminum-clad steel wire comprises a steel core and an aluminum piece positioned at the periphery of the steel core, and the sectional area of the aluminum piece accounts for 70-74% of the sectional area of the aluminum-clad steel wire.

Further, the conductor layer comprises a plurality of conductors positioned at the periphery of the protective layer, and two adjacent conductors are arranged in a laminating mode.

Further, the cross section of the conductor is T-shaped, Z-shaped or S-shaped.

Further, the conductor is an aluminum alloy wire.

By applying the technical scheme of the utility model, on one hand, compared with the problem that in the prior art, when a steel pipe with a certain outer diameter is placed with excessive fiber cores, a plurality of optical fibers are mutually extruded, so that the optical fiber attenuation is increased, in the embodiment, the plurality of optical fibers are arranged in a flexible protection pipe to form an optical fiber unit, the plurality of optical fiber units are arranged in the protection unit, and a protection layer and a conductor layer are sequentially arranged outside the protection unit, so that the steel pipe with a certain outer diameter does not need to be placed with excessive fiber cores, the problem that the optical fibers are mutually extruded due to the excessive fiber cores in the optical fiber unit, so that the optical fiber attenuation is increased due to the mutual extrusion of the plurality of optical fibers is avoided; on the other hand, for the existing replacement of an aluminum-clad steel wire with a steel tube light unit, the embodiment can increase the optical fiber core number of the optical fiber composite overhead phase line without replacing the aluminum-clad steel wire with the steel tube light unit, and the embodiment is provided with the protective layer and the conductor layer, which have certain supporting effect on the optical fiber assembly, so that the overall mechanical property is improved, the problems that the original replacement of the aluminum-clad steel wire with the light unit causes the reduction of the parameters such as the bearing sectional area, the force value, the short-circuit current and the like of the optical fiber composite overhead phase line are avoided, and the problems that the stress and the attenuation of the optical fiber caused by continuously increasing the light unit cannot meet the line communication requirement are solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of the optical fiber composite overhead phase wire of the present utility model.

Wherein the above figures include the following reference numerals:

1. an optical fiber assembly; 2. a protective layer; 3. a conductor layer; 4. a protection unit; 5. a reinforcing member; 6. an optical fiber unit; 7. an optical fiber; 8. a flexible protective tube; 9. and a heat insulation layer.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The patent number of the optical fiber composite overhead phase line is 201621462037.7, the optical fiber composite overhead phase line adopts optical fibers with 200 mu m small outer diameter, the maximum fiber capacity is only 36 cores, the requirements of optical fiber communication at present cannot be met, and the cost is obviously higher than that of common optical fibers under the condition of the same core number by adopting the optical fibers with small core diameters.

Thus, as shown in FIG. 1, an embodiment of the present utility model provides an optical fiber composite overhead phase wire. The optical fiber composite overhead phase line comprises an optical fiber assembly 1, a protective layer 2 and a conductor layer 3 which are sequentially arranged from inside to outside, wherein the optical fiber assembly 1 comprises: the protection unit 4 is a cylindrical structure with a through hole; a reinforcing member 5 located in the through hole; a plurality of optical fiber units 6 are positioned in the through holes, the plurality of optical fiber units 6 are stranded on the outer periphery of the reinforcing member 5, and the optical fiber units 6 comprise a plurality of optical fibers 7 and a flexible protection tube 8 positioned on the outer periphery of the plurality of optical fibers 7.

In the above technical solution, on one hand, compared with the problem that in the prior art, when too many optical fiber cores are placed in a steel pipe with a certain outer diameter to cause mutual extrusion among a plurality of optical fibers 7, so that the attenuation of the optical fibers 7 is increased, in this embodiment, the optical fibers 7 are arranged in a flexible protection pipe 8 to form an optical fiber unit 6, and the optical fibers 6 are arranged in a protection unit 4, and the protection unit 4 is further provided with a protection layer 2 and a conductor layer 3 in sequence outside, so that the too many optical fiber cores are not needed to be placed in the steel pipe with a certain outer diameter, and the problem that the attenuation of the optical fibers 7 is increased due to mutual extrusion among the optical fibers 7 is avoided; on the other hand, compared with the existing method that an aluminum-clad steel wire is replaced by a steel tube optical unit, the method can increase the optical fiber core number of the optical fiber composite overhead phase line without replacing the aluminum-clad steel wire by the steel tube optical unit, the method is provided with the protective layer 2 and the conductor layer 3, the protective layer 2 and the conductor layer 3 have certain supporting effect on the optical fiber assembly 1, and the overall mechanical property is improved, so that the problems that the original aluminum-clad steel wire is replaced by the optical unit, and parameters such as the bearing sectional area, the force value and the short circuit current of the optical fiber composite overhead phase line are reduced are avoided, and the optical unit is continuously increased, so that the stress and attenuation of the optical fiber are increased, and the line communication requirement cannot be met are solved.

Preferably, in the embodiment of the present utility model, the reinforcing member 5 is made of an aramid rod, so that the aramid rod can bear a part of the force applied to the optical fiber unit 6 to support the optical fiber unit 6, thereby avoiding the extrusion loss of the optical fiber unit 6 and thus avoiding affecting the service life of the optical fiber 7.

Specifically, in the embodiment of the utility model, one part of the optical fibers is a single-mode optical fiber, the single-mode optical fiber is used as a carrier for transmitting communication signals, and the other part of the optical fibers is a multimode temperature measuring optical fiber (A1 a,50/125 multimode optical fiber), so that the multimode temperature measuring optical fiber can realize temperature monitoring of the optical fiber composite overhead phase line.

As shown in fig. 1, in the embodiment of the present utility model, the optical fiber assembly 1 further includes a heat insulating layer 9 located at the outer circumference of the plurality of optical fiber units 6, the heat insulating layer 9 being located between the plurality of optical fiber units 6 and the protection unit 4.

In the above technical solution, by providing the heat insulation layer 9 between the optical fiber unit 6 and the protection unit 4, it is possible to avoid heat of the conductor layer 3 from being transferred from the protection layer 2 to the optical fiber unit 6 through the protection unit 4 of the optical fiber assembly 1, thereby avoiding damage to the function of the optical fiber unit 6.

In the embodiment of the present utility model, as shown in fig. 1, the heat insulating layer 9 is formed of a mica tape wrapped around the outer circumferences of the plurality of optical fiber units 6.

In one embodiment, the mica tape may be replaced with other insulating materials.

In the embodiment of the utility model, as shown in fig. 1, the flexible protection tube 8 is a loose tube.

Preferably, in an embodiment of the utility model, the loose tube is a PBT (polybutylene terephthalate) loose tube.

In the above technical scheme, the loose tube is used as the flexible protection tube 8, and the optical fiber 7 is placed in the loose tube, so that the abrasion of the optical fiber 7 caused by the direct contact between the optical fiber 7 and the protection unit 4 is avoided, and the damage of the performance of the optical fiber 7 is avoided.

Of course, in embodiments of the present utility model, the loose tube may be replaced with other flexible materials.

Preferably, in the embodiment of the present utility model, 6 to 8 flexible protection pipes 8 may be placed in the protection unit 4, so that the number of the optical fiber units 6 may be two to three times greater than the existing structure.

Preferably, in an embodiment of the present utility model, 12 to 24 optical fibers 7 may be placed in the loose tube. Therefore, the capacity of the optical fiber can reach more than 72 cores and can reach 144 cores at most, and the requirement of most of the current lines on the core number of the optical fiber composite overhead phase line is met.

As shown in fig. 1, in the embodiment of the present utility model, the protection unit 4 is made of a steel pipe or an aluminum pipe.

Preferably, in the embodiment of the present utility model, the protection unit 4 is made of an aluminum pipe, so that the use of the aluminum pipe material can increase the transmission capacity of the optical fiber composite overhead phase wire due to the lower resistivity of the aluminum pipe material relative to other materials.

In one embodiment, the protection unit 4 may also be made of steel pipe or other rigid material.

As shown in fig. 1, in the embodiment of the present utility model, the protective layer 2 includes a plurality of aluminum-clad steel wires stranded around the outer periphery of the optical fiber assembly 1, and two adjacent aluminum-clad steel wires are attached to each other.

In the above technical scheme, two adjacent aluminum-clad steel wires on the periphery of the optical fiber assembly 1 are tightly attached, so that the gap of the aluminum-clad steel wires can be reduced, the cross-sectional area of the protective layer 2 is increased, and the thickness of the protective layer 2 is further reduced, so that the outer diameter of the optical fiber composite overhead phase wire is reduced.

In the embodiment of the present utility model, as shown in fig. 1, the cross section of the aluminum-clad steel wire is a sector.

In the embodiment of the present utility model, the cross section of the aluminum-clad steel wire is perpendicular to the axis of the aluminum-clad steel wire.

In the technical scheme, the aluminum-clad steel wire adopts the structure that the cross section is fan-shaped, so that two adjacent aluminum-clad steel wires are tightly attached, the cross section area of the protective layer 2 is increased while the space between the aluminum-clad steel wires is reduced, the thickness of the protective layer 2 is reduced, and the outer diameter of the optical fiber composite overhead phase wire is reduced.

Further, the cross section of the aluminum-clad steel wire is set to be fan-shaped, so that the structure is simpler and the processing is convenient.

As shown in fig. 1, in the embodiment of the present utility model, the aluminum-clad steel wire includes a steel core and an aluminum member located at the outer circumference of the steel core, and the sectional area of the aluminum member is 70% to 74% of the sectional area of the aluminum-clad steel wire.

According to the technical scheme, the aluminum-clad steel wire comprises the steel core at the center and the aluminum piece at the periphery of the steel core, so that the steel core can effectively improve the overall mechanical strength of the aluminum-clad steel wire, the sectional area of the aluminum core of the aluminum-clad steel wire accounts for 70-74% of the sectional area of the aluminum-clad steel wire, and the conductive section of the aluminum-clad steel wire can be improved by more than 10%, so that the resistivity of the aluminum-clad steel wire is similar to the single wire resistivity of the aluminum alloy wire in the optical fiber composite overhead phase line, the resistivity of the aluminum-clad steel wire is reduced, and the electric performance of the aluminum-clad steel wire in the embodiment is improved compared with that of the aluminum-clad steel wire commonly used in the prior art.

As shown in fig. 1, in the embodiment of the present utility model, the conductor layer 3 includes a plurality of conductors located at the outer periphery of the protection layer 2, and two adjacent conductors are disposed in a laminated manner.

In the above technical scheme, two adjacent conductors of the conductor layer 3 are closely attached, so that a gap between the conductors can be reduced, thereby increasing the cross-sectional area of the conductor layer 3, and further reducing the thickness of the conductor layer 3, so as to reduce the outer diameter of the optical fiber composite overhead phase line.

Further, in embodiments of the utility model, reducing the cross-sectional area of the conductor may reduce raw material consumption and reduce carbon emissions during manufacturing.

In the embodiment of the utility model, the cross section of the conductor is T-shaped or Z-shaped or S-shaped, as shown in figure 1.

Preferably, in the embodiment of the present utility model, the cross section of the conductor is S-shaped, which increases the bonding area of two adjacent conductors, so that the combination of the conductor layers 3 is tighter and the structure is more stable.

Preferably, in the embodiment of the present utility model, the conductor layer 3 is two layers, and the installation directions of the S-shaped conductors in the two conductor layers 3 are opposite, so that the structure of the conductor layer 3 can be more stable; and the two conductor layers 3 are closely attached.

In one embodiment, the cross section of the conductors is Z-shaped, so that the bonding area of two adjacent conductors is increased, and the combination of the conductor layers 3 is tighter. The conductor with the Z-shaped cross section is the same as the conductor with the S-shaped cross section in the installation mode, and the description is omitted here.

In one embodiment, the conductors are T-shaped in cross section, with adjacent two T-shaped conductors being mounted in opposite directions to achieve a tight connection.

In the embodiment of the utility model, the T-shaped or Z-shaped or S-shaped conductors are special-shaped wires, the special-shaped wires are drawn into a target section line shape through a hole type gradual change mode die, and the problem that the special-shaped wires are easy to turn over is solved by adopting a special pre-forming and double-wheel positioning device during twisting.

In the prior art, an optical fiber composite overhead phase wire (OPPC) is mainly used for achieving the purpose of communication capacity expansion by replacing an original aluminum-clad steel wire with optical units so as to increase the number of the optical units of the steel tube. After the number of the optical units of the steel pipe is increased, parameters such as bearing sectional area, force value and short-circuit current of the optical cable are reduced, if the original electric and mechanical performance level is required to be achieved, the outer diameter and section parameters of the optical fiber composite overhead phase line must be amplified, so that the tower of the distribution network line cannot bear the weight of the optical cable, the risk of tower inversion exists, and great potential safety hazards are brought to line operation.

In order to solve the above problems, as shown in fig. 1, in the embodiment of the present utility model, the conductor is an aluminum alloy wire, and the electrical resistivity of the aluminum alloy wire is low, so that the transmission capacity of the line can be effectively increased, and thus, the number of optical fiber cores can be effectively increased without increasing the outer diameter of the optical fiber composite overhead phase wire.

Preferably, in the embodiment of the utility model, the aluminum alloy wire is a heat-resistant aluminum alloy wire, the tensile strength of the heat-resistant aluminum alloy wire is larger than that of the hard aluminum wire, and the heat resistance of the heat-resistant aluminum alloy wire is good, so that good transmission performance can be maintained when a large amount of current passes through the heat-resistant aluminum alloy wire, and meanwhile, overheat deformation of the conductive layer is avoided.

It should be noted that the conventional OPPC-24B1-160/30 structure of the optical fiber composite overhead phase line has an outer diameter of 18.2mm and an optical fiber capacity of only 24 cores, while the optical fiber composite overhead phase line adopting the embodiment of the utility model has a minimum cross-sectional area of 165mm ² The minimum outer diameter may be 17.4mm and the maximum fiber core count capacity 72 cores. Under the condition of unchanged mechanical property and electric property, the cross section can be reduced by 13.1%, the outer diameter is reduced by 5%, and the core number is increased by three times.

Under the same force value and current-carrying capacity parameter requirements, the novel optical fiber composite overhead phase line (OPPC) has the optical fiber core number reaching more than 72 cores, does not additionally increase the burden of a pole tower, and effectively solves the technical problem of tension of the communication capacity of the existing optical cable.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: on the one hand, compared with the problem that in the prior art, when too many optical fiber cores are put into a steel pipe with a certain outer diameter to cause mutual extrusion among a plurality of optical fibers, so that the optical fiber attenuation is increased, in the embodiment, the optical fiber units are arranged in the flexible protection pipe to form the optical fiber units, the optical fiber units are arranged in the protection unit, and the protection layer and the conductor layer are sequentially arranged outside the protection unit, so that the too many optical fiber cores are not needed to be put into the steel pipe with a certain outer diameter, the problem that the optical fiber attenuation is increased due to mutual extrusion among the optical fibers is avoided; on the other hand, for the existing replacement of an aluminum-clad steel wire with a steel tube light unit, the embodiment can increase the optical fiber core number of the optical fiber composite overhead phase line without replacing the aluminum-clad steel wire with the steel tube light unit, and the embodiment is provided with the protective layer and the conductor layer, which have certain supporting effect on the optical fiber assembly, so that the overall mechanical property is improved, the problems that the original replacement of the aluminum-clad steel wire with the light unit causes the reduction of the parameters such as the bearing sectional area, the force value, the short-circuit current and the like of the optical fiber composite overhead phase line are avoided, and the problems that the stress and the attenuation of the optical fiber caused by continuously increasing the light unit cannot meet the line communication requirement are solved.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The optical fiber composite overhead phase wire is characterized by comprising an optical fiber assembly (1), a protective layer (2) and a conductor layer (3) which are sequentially arranged from inside to outside, wherein the optical fiber assembly (1) comprises:

a protection unit (4) having a tubular structure with a through hole;

a reinforcing member (5) located within the through hole;

the optical fiber units (6) are positioned in the through holes, the optical fiber units (6) are stranded on the periphery of the reinforcing member (5), and the optical fiber units (6) comprise a plurality of optical fibers (7) and flexible protection pipes (8) positioned on the periphery of the optical fibers (7).

2. The optical fiber composite overhead phase wire according to claim 1, wherein the optical fiber assembly (1) further comprises a heat insulating layer (9) located at the outer periphery of the plurality of optical fiber units (6), the heat insulating layer (9) being located between the plurality of optical fiber units (6) and the protection unit (4).

3. Optical fiber composite overhead phase wire according to claim 2, characterized in that the insulating layer (9) is formed by a mica tape wrapped around the outer circumference of a plurality of the optical fiber units (6).

4. Optical fiber composite overhead phase wire according to claim 1, characterized in that the flexible protective tube (8) is a loose tube; alternatively, the protection unit (4) is made of steel or aluminum pipe.

5. Optical fiber composite overhead phase wire according to any one of claims 1 to 4, characterized in that the protective layer (2) comprises a plurality of aluminum-clad steel wires stranded around the periphery of the optical fiber assembly (1), adjacent two of the aluminum-clad steel wires being arranged in a fitting manner.

6. The optical fiber composite overhead phase wire according to claim 5, wherein the aluminum-clad steel wire has a sector-shaped cross section.

7. The optical fiber composite overhead phase wire according to claim 5, wherein the aluminum-clad steel wire comprises a steel core and an aluminum member located at an outer periphery of the steel core, and a sectional area of the aluminum member is 70% to 74% of a sectional area of the aluminum-clad steel wire.

8. Optical fiber composite overhead phase wire according to any one of claims 1 to 4, characterized in that the conductor layer (3) comprises a plurality of conductors located at the periphery of the protective layer (2), adjacent two of the conductors being arranged in a conforming manner.

9. The optical fiber composite overhead phase wire according to claim 8, wherein the cross section of the conductor is T-shaped or Z-shaped or S-shaped.

10. The optical fiber composite overhead phase wire of claim 8, wherein the conductor is an aluminum alloy wire.