Corona-resistant aluminum tube supporting type expanded-diameter optical fiber composite overhead phase line

Abstract

The utility model relates to a corona-resistant aluminum tube supporting type expanded-diameter optical fiber composite overhead phase line, which comprises an embossed aluminum tube with a hollow structure; the conductor layer comprises a plurality of conductive aluminum wires, the plurality of conductive aluminum wires are sequentially and annularly stranded and spliced end to end and wrap an embossed aluminum tube to form the conductive layer, each conductive aluminum wire is provided with a notch, and the notches of every two adjacent conductive aluminum wires can be spliced to form a closed accommodating space; and the optical unit is embedded in the accommodating space between the two adjacent conductive aluminum wires. The utility model provides a corona-resistant aluminum tube supporting type expanded-diameter optical fiber composite overhead phase line, which adopts an expanded-diameter structure to achieve the purpose of reducing corona discharge.

Description

Technical Field

[0001] The utility model relates to the technical field of the structure of optical fiber composite overhead phase conductors (OPPCs), in particular to a corona-resistant aluminum tube supported and expanded optical fiber composite overhead phase conductor. Background Art

[0002] Referring to Figure 1 As shown, a conventional OPPC (optical fiber composite overhead phase conductor) is improved from an aluminum-clad steel core aluminum stranded wire in a traditional overhead transmission wire. A stainless steel tube optical unit 100 is embedded into an aluminum-clad steel wire 200, and a hard aluminum wire 300 is stranded on the outer layer, thus forming the most typical OPPC structure.

[0003] However, the existing OPPC has a simple structure. When it is energized and operating, with a large current and high voltage acting on the wire, when the local electric field strength reaches a certain value, the gas undergoes local ionization, resulting in a corona phenomenon. The corona discharge causes power transmission loss; the discharge will generate effects such as light, sound, and heat, and cause chemical reactions in the surrounding air, generating products such as ozone and nitrogen oxides, corroding the transmission line; moreover, the corona discharge will generate high-frequency pulse currents (also known as Trichel currents), and these pulses are exactly in the radio wave band, which will generate strong radio interference, and this will have an inestimable impact on radio communication, television signal transmission, etc. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem that the existing OPPC is prone to corona phenomenon under the action of large current and high voltage, and provide a corona-resistant aluminum tube supported and expanded optical fiber composite overhead phase conductor, adopting an expanded structure to achieve the purpose of reducing corona discharge.

[0005] To solve the above technical problem, the utility model provides a corona-resistant aluminum tube supported and expanded optical fiber composite overhead phase conductor, including:

[0006] A corrugated aluminum tube having a hollow structure;

[0007] A conductor layer, including a plurality of conductive aluminum wires, and the plurality of conductive aluminum wires are sequentially spliced end to end in a circular stranded manner and coated outside the corrugated aluminum tube to form the conductive layer. The conductive aluminum wire has a notch, and the notches of two adjacent conductive aluminum wires can be spliced to form an accommodating space;

[0008] An optical unit is embedded in the accommodating space between two adjacent conductive aluminum wires.

[0009] In an embodiment of the utility model, the conductor layer has a multi-layer structure, and each layer structure is formed by sequentially splicing a plurality of the conductive aluminum wires end to end in a circular stranded manner, and the multi-layer structures are concentrically arranged.

[0010] In an embodiment of the present utility model, the conductive aluminum wire has a "worker" - shaped structure.

[0011] In an embodiment of the present utility model, the outer of the conductive aluminum wire is filled with anti - corrosion grease.

[0012] In an embodiment of the present utility model, the conductive aluminum wire is a semi - hard aluminum wire and is made of semi - hard aluminum material.

[0013] In an embodiment of the present utility model, the conductivity of the conductive aluminum wire is greater than 61.5% IACS.

[0014] In an embodiment of the present utility model, the allowable long - term use temperature of the conductive aluminum wire is 150 °C.

[0015] In an embodiment of the present utility model, a plurality of the optical units are embedded in the conductor layer;

[0016] In an embodiment of the present utility model, the optical unit has a hose - coated structure.

[0017] In an embodiment of the present utility model, the outer of the conductor layer is further coated with a corona - resistant insulating paint layer.

[0018] The above - mentioned technical solution of the present utility model has the following advantages compared with the prior art:

[0019] For the corona - resistant aluminum - tube - supported and expanded - diameter optical - fiber composite overhead phase wire of the present utility model, which replaces the aluminum - clad steel core in the existing optical - fiber composite overhead phase wire and uses a corrugated aluminum tube as the load - bearing core, can not only reduce the self - weight of the optical - fiber composite overhead phase wire and lower the sag during overhead wiring, but also set a hollow structure in the corrugated aluminum tube to achieve the effect of diameter expansion. Without increasing the weight, it can increase the diameter of the optical - fiber composite overhead phase wire, make the surface electric field of the optical - fiber composite overhead phase wire more uniform, and after the electric field is uniform, it can play a role in reducing corona, thus eliminating the negative impact caused by corona discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in combination with the drawings, where:

[0021] Figure 1 is a schematic structural diagram of an optical - fiber composite overhead phase wire of the prior art;

[0022] Figure 2 is a schematic structural diagram of the corona - resistant aluminum - tube - supported and expanded - diameter optical - fiber composite overhead phase wire of the present utility model.

[0023] Description of the reference numerals in the drawings: 1. Corrugated aluminum tube; 2. Conductor layer; 21. Conductive aluminum wire; 3. Optical unit; 4. Corona-resistant insulating paint layer. 100. Stainless steel tube optical unit; 200. Aluminum-clad steel wire; 300. Hard aluminum wire. Detailed implementation manners

[0024] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited are not intended to limit the present utility model.

[0025] Referring to Figure 2 As shown, the present utility model discloses a corona-resistant aluminum tube-supported expanded-diameter optical fiber composite overhead phase wire, including: a corrugated aluminum tube 1, a conductor layer 2 and an optical unit 3, wherein: the conductor layer 2 and the optical unit 3 are respectively used to realize the transmission of electrical signals and optical signals, so that the optical fiber composite overhead phase wire has the functions of power transmission and communication. In this embodiment, the conductor layer 2 includes a plurality of conductive aluminum wires 21, and the plurality of conductive aluminum wires 21 are sequentially spliced end to end in a circular stranded manner and coated outside the corrugated aluminum tube 1 to form the conductive layer. Moreover, the conductive aluminum wire 21 is provided with a notch, and the notches of two adjacent conductive aluminum wires 21 can be spliced to form an accommodating space, and the optical unit 3 is embedded in the accommodating space between two adjacent conductive aluminum wires 21, which can realize the protection of the optical unit 3;

[0026] Furthermore, the corrugated aluminum tube 1 is provided with a hollow structure, replacing the aluminum-clad steel core in the existing optical fiber composite overhead phase wire. The corrugated aluminum tube 1 is used as the load-bearing core, which can not only reduce the self-weight of the optical fiber composite overhead phase wire and reduce the sag during overhead wiring, but also, a hollow structure is provided in the corrugated aluminum tube 1 to achieve the effect of diameter expansion. Without increasing the weight, the diameter of the optical fiber composite overhead phase wire can be increased, making the surface electric field of the optical fiber composite overhead phase wire more uniform. After the electric field is uniform, it can play a role in reducing corona, thereby eliminating the negative impact caused by corona discharge.

[0027] Specifically, in actual design, according to the requirement of current-carrying capacity, the conductor layer 2 can be provided with a multi-layer structure, and each layer structure is formed by sequentially splicing a plurality of the conductive aluminum wires 21 end to end in a circular stranded manner. The multi-layer structures are concentrically arranged. By increasing the number of stranded layers of the conductor layer 2, the current-carrying capacity of the optical fiber composite overhead phase wire can be increased to meet the actual use requirements.

[0028] To further illustrate how to embed the optical unit 3 in the conductive aluminum wire 21, this embodiment provides a specific structure of the conductive aluminum wire 21. Referring to Figure 2As shown, the conductive aluminum wire 21 has a "work" - shaped structure. Notches are provided on both side surfaces of the conductive aluminum wire 21. When two conductive aluminum wires 21 are spliced, the notches of the two conductive aluminum wires 21 are also spliced correspondingly. After the two notches are spliced, a circular closed accommodation space can be formed. Placing the optical unit 3 in this accommodation space can play a role in protecting the optical unit 3.

[0029] For the existing OPPC in the prior art, referring to Figure 1 As shown, most of them are single - root stainless - steel tube optical units 100 embedded in the phase wire. It is difficult to repair and continue to use the stainless - steel tube optical unit 100 after it is damaged. And in order to consider the mechanical properties of the OPPC, the stainless - steel tube optical unit 100 is used to replace the aluminum - clad steel wire 200, and it needs to be coated with a stainless - steel tube to ensure its mechanical properties;

[0030] To solve the above problems, in this embodiment, using the conductive aluminum wire 21 can protect the optical unit 3. Therefore, there is no need to consider the mechanical properties of the optical unit 3. The optical unit 3 can be set with a hose - coated structure. Compared with the prior art of using a stainless - steel tube to coat and support the optical unit 3, the hose - coated optical unit 3 is more convenient for pre - forming adjustment during the production of the conductive aluminum wire 21, and the dimensional requirements are not so precise.

[0031] Specifically, in this embodiment, multiple optical units 3 are embedded in the conductor layer 2. When one optical unit 3 is damaged, it does not affect the normal use of other optical units 3, and the maintenance times of the optical fiber composite overhead phase wire can be reduced.

[0032] Specifically, when preparing the optical fiber composite overhead phase wire of the present invention, anti - corrosion grease is filled between two adjacent conductive aluminum wires 21 and between two adjacent layers of conductive aluminum wires 21. The anti - corrosion grease can increase the corrosion resistance of the conductive aluminum wire 21. And the dropping point of the anti - corrosion grease ≥180°C, which can meet the allowable long - term operating temperature of 150°C of the conductive aluminum wire 21. During normal use, the anti - corrosion grease will not melt.

[0033] The conductive material of the existing OPPC uses hard aluminum material, with a resistivity of 28.264 nΩ·m, equivalent to 61% IACS. During the power - on operation process, the power consumption is large, and the existing OPPC has a low long - term operating temperature, only 70°C, and a small current - carrying capacity, similar to that of ordinary aluminum - clad steel - core aluminum stranded wires, which cannot meet the large - capacity demand.

[0034] To solve this problem, in this embodiment, the conductive aluminum wire 21 is set as a semi-rigid aluminum wire, which is made of semi-rigid aluminum material. Compared with hard aluminum material, the conductivity of the semi-rigid aluminum wire is greater than 61.5% IACS, and during the power-on process, the power loss is smaller. Moreover, the allowable long-term use temperature of the semi-rigid aluminum wire is 150 °C, which is much higher than the operating temperature of only 70 °C of the existing OPPC, and can meet the requirements of large-capacity transmission.

[0035] Referring to Figure 2 As shown, the optical fiber composite overhead phase line of this embodiment further includes: a corona-resistant insulating paint layer 4, and the corona-resistant insulating paint layer 4 is coated outside the conductor layer 2, which can increase the corona-resistant performance of the optical fiber composite overhead phase line and further achieve the effect of reducing corona discharge. The corona-resistant insulating paint can withstand a voltage of 220 kV, and its heat-resistant performance can reach 180 °C, and the long-term operating temperature is greater than 150 °C.

[0036] Obviously, the above embodiments are only examples clearly described and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line, characterized in that: include: Corrugated aluminum tube, with a hollow structure; The conductor layer includes a plurality of conductive aluminum wires, which are twisted and spliced ​​in an end-to-end manner and coated on the outside of the corrugated aluminum tube to form the conductor layer. The conductive aluminum wires have gaps, and the gaps of two adjacent conductive aluminum wires can be spliced ​​to form a closed accommodation space; The optical unit is embedded in the accommodation space between two adjacent conductive aluminum wires.

2. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The conductor layer has a multi-layer structure, each layer of the structure is formed by a plurality of the conductive aluminum wires being twisted and spliced ​​in sequence end to end in an annular manner, and the multi-layer structure is concentrically arranged.

3. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The conductive aluminum wire is an "I"-shaped structure.

4. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The conductive aluminum wire is filled with anti-corrosion grease.

5. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The conductive aluminum wire is a semi-hard aluminum wire, which is made of semi-hard aluminum material.

6. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The electrical conductivity of the conductive aluminum wire is greater than 61.5% IACS.

7. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The permissible long-term use temperature of the conductive aluminum wire is 150°C.

8. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: A plurality of the optical units are embedded in the conductor layer.

9. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The light unit is a hose-wrapped structure.

10. The corona-resistant aluminum tube supported expanded diameter optical fiber composite overhead phase line according to claim 1, characterized in that: The conductor layer is also coated with a corona-resistant insulating paint layer.

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