CN217333691U - Optical fiber composite overhead ground wire - Google Patents
Optical fiber composite overhead ground wire Download PDFInfo
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- CN217333691U CN217333691U CN202220981873.5U CN202220981873U CN217333691U CN 217333691 U CN217333691 U CN 217333691U CN 202220981873 U CN202220981873 U CN 202220981873U CN 217333691 U CN217333691 U CN 217333691U
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- optical fiber
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- clad steel
- ground wire
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model relates to a power communication technical field aims at solving the problem that improves short-circuit current capacity and can cause negative effects to compound overhead earth wire of optic fibre. An optical fiber composite overhead ground wire is provided, which comprises an optical fiber unit, an aluminum pipe and a plurality of aluminum-clad steel wires. The aluminum pipe wraps the outer side of the optical fiber unit, and the outer surface of the aluminum pipe is provided with a plurality of straight surfaces which are connected in sequence at included angles. The outer side of aluminum pipe is located to a plurality of aluminium clad steel wire rings, and in optical fiber unit's radial direction, a straight surface of every aluminium clad steel wire's internal surface butt, a plurality of aluminium clad steel wire's surface has the segmental arc respectively, and a plurality of segmental arcs connect gradually and enclose into a face of cylinder. The beneficial effects of the utility model are that improve the short-circuit current capacity of compound overhead earth wire of optic fibre, mechanical properties and optical fiber transmission performance simultaneously.
Description
Technical Field
The utility model relates to a power communication technical field particularly, relates to compound overhead earth wire of optic fibre.
Background
An optical fiber composite overhead ground wire (OPGW) is a major product of power communications, and it assumes dual functions of ground wire and communications. The short-circuit current capacity is an index for measuring the temperature characteristics of the OPGW, when a single-phase earth fault occurs to a power transmission line, the short-circuit current of the line flows through the OPGW, and particularly, the short-circuit current can reach dozens of kA near about 5km of a power substation. The OPGW generates heat due to excessive short-circuit current, the mechanical and optical signal transmission performance of the OPGW is influenced due to excessive temperature, and a birdcage phenomenon or a strand breaking phenomenon can be generated in the OPGW in severe cases.
Known means for improving the short-circuit current capacity mainly include: and the single wires on the outer layer of the OPGW are replaced by high-conductivity single wires, the integral structure of the amplifying optical cable and the like. However, the adoption of the high-conductivity monofilament can cause the loss of the mechanical property of the OPGW, and the parameters such as the optical cable force value and the like can be reduced while the short-circuit current capacity is increased; the enlargement of the whole structure can increase the outer diameter and weight of the optical cable, so that the wire diameter and weight of the optical cable can exceed the bearing range of the tower, and hidden troubles are brought to the safe operation of the whole line.
SUMMERY OF THE UTILITY MODEL
The utility model provides a compound overhead earth wire of optic fibre to solve and improve the problem that short-circuit current capacity can cause negative effects to compound overhead earth wire of optic fibre.
The embodiment of the utility model is realized like this:
an optical fiber composite overhead ground wire comprises an optical fiber unit, an aluminum pipe and a plurality of aluminum-clad steel wires. The aluminum pipe is coated on the outer side of the optical fiber unit, and the outer surface of the aluminum pipe is provided with a plurality of straight surfaces which are connected in sequence at included angles. The plurality of aluminum-clad steel wires are annularly arranged on the outer side of the aluminum pipe, the inner surface of each aluminum-clad steel wire abuts against one flat surface in the radial direction of the optical fiber unit, the outer surfaces of the plurality of aluminum-clad steel wires are respectively provided with arc sections, and the arc sections are sequentially connected to form a cylindrical surface.
In one possible embodiment: the aluminum-clad steel wire comprises a steel core and an aluminum layer, and the aluminum layer is coated on the outer side of the steel core.
In one possible embodiment: on the radial section of the aluminum-clad steel wire, the area ratio of the sections of the aluminum layer and the steel core is N, wherein N is more than 1.5 and less than 4.
In one possible embodiment: the aluminum layer and the aluminum pipe are made of the same aluminum material.
In one possible embodiment: the optical fiber unit includes: loosening the sleeve; and the optical fibers are arranged on the inner side of the loose tube.
In one possible embodiment: the optical fiber unit further comprises a waterproof layer, and the waterproof layer is arranged on the outer surface of the loose tube.
In one possible embodiment: the optical fiber unit further comprises a reinforcing layer, and the reinforcing layer is arranged on the outer surface of the loose tube.
In one possible embodiment: the optical fiber unit further comprises a heat insulation layer, and the heat insulation layer is arranged on the outer side of the loose tube.
In one possible embodiment: the aluminum pipe is provided with six straight surfaces, and the included angle between every two adjacent straight surfaces is 120 degrees.
In one possible embodiment: in the radial direction of the optical fiber unit, a plurality of the aluminum-clad steel wires are provided with a plurality of layers.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive efforts.
Fig. 1 is one of schematic structural diagrams of an optical fiber composite overhead ground wire according to an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of an optical fiber composite overhead ground wire according to an embodiment of the present invention.
Description of the main element symbols:
optical fiber composite overhead ground wire 100
Loose tube 13
Reinforcing layer 11
Aluminum clad steel wire 30
Arc segment 31
Steel core 32
Aluminum layer 33
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
Some embodiments of the invention are described in detail. In the following embodiments, features of the embodiments may be combined with each other without conflict.
Examples
Referring to fig. 1 to 2, the present embodiment provides an optical fiber composite overhead ground wire 100 including an optical fiber unit 10, an aluminum pipe 20, and a plurality of aluminum-clad steel wires 30. An aluminum tube 20 is wrapped around the optical fiber unit 10, and the outer surface of the aluminum tube 20 has a plurality of flat surfaces 21 connected in sequence at an angle. The plurality of aluminum-clad steel wires 30 are annularly arranged on the outer side of the aluminum pipe 20, the inner surface of each aluminum-clad steel wire 30 abuts against a straight surface 21 in the radial direction of the optical fiber unit 10, the outer surfaces of the plurality of aluminum-clad steel wires 30 are respectively provided with arc sections 31, and the arc sections 31 are sequentially connected and enclose a cylindrical surface.
The aluminum pipe 20 is coated on the outer side of the optical fiber unit 10, so that the aluminum pipe 20 can provide more aluminum materials for the whole optical fiber composite overhead ground wire 100, and can be matched with aluminum of the aluminum-clad steel wire 30 to reduce the resistivity of the optical fiber composite overhead ground wire 100, thereby improving the short-circuit current capacity of the optical fiber composite overhead ground wire 100. Meanwhile, the steel in the aluminum-clad steel wire 30 has better mechanical properties to improve the tensile strength of the optical fiber composite overhead ground wire 100, and the aluminum in the aluminum-clad steel wire 30 is also matched with the aluminum pipe 20 and can bear a part of force to improve the mechanical properties of the optical fiber composite overhead ground wire 100, so that the mechanical properties of the optical fiber composite overhead ground wire 100 can be better guaranteed not to be affected.
In addition, since the inner surfaces of the plurality of aluminum-clad steel wires 30 in this embodiment are respectively abutted against the plurality of flat surfaces 21, the outer surfaces of the plurality of aluminum-clad steel wires 30 are respectively provided with the arc sections 31, and the plurality of arc sections 31 are sequentially connected to form a circle, compared with the conventional method in which the plurality of circular aluminum-clad steel wires 30 are simply arranged around the outer side of the optical fiber unit 10, the plurality of aluminum-clad steel wires 30 of this embodiment are smaller in size than the outer diameter of the circular aluminum-clad steel wires 30 in the radial direction of the optical fiber unit 10, so that the outer diameter of the optical fiber composite overhead ground wire 100 can be reduced, the sag of the optical fiber composite overhead ground wire 100 can be improved on the premise of the same quality, and the consumption of raw materials and the carbon emission can be reduced on the condition of the same outer diameter size, and the short-circuit current capacity can be improved.
It should be noted that, a plurality of aluminum-clad steel wires 30 in this embodiment may be stranded and extruded on the outer surface of the aluminum pipe 20 in a mold to achieve the structural description in this embodiment, and after the stranded and extruded, the structure of the optical fiber composite overhead ground wire 100 in this embodiment is more compact, which can further reduce the outer diameter of the optical fiber composite overhead ground wire 100.
Specifically, the aluminum pipe 20 in the present embodiment may be understood as a polygonal cylinder into which the optical fiber unit 10 is inserted in the axial direction of the polygonal cylinder with a space between the outer surface of the optical fiber unit 10 and the outer surface of the polygonal cylinder, and thus the flat surfaces 21 in the present embodiment are each flat surface in the outer surface of the polygonal cylinder.
Referring to fig. 1, in one embodiment of the present embodiment, the aluminum-clad steel wire 30 includes a steel core 32 and an aluminum layer 33, and the aluminum layer 33 is coated outside the steel core 32.
Because the aluminum layer 33 is coated on the outer side of the steel core 32, the problem that the steel core 32 is exposed is avoided, the problem that the steel core 32 is directly contacted with the aluminum pipe 20 can also be avoided, the foundation between the aluminum layer 33 and the aluminum pipe 20 is ensured, and the aluminum pipe 20 and the aluminum layer 33 are matched to achieve the effect of improving the short-circuit current capacity.
Referring to FIG. 1, in one embodiment of the present embodiment, the ratio of the cross-sectional area of the aluminum layer 33 to the steel core 32 is N, wherein 1.5 < N < 4, in a radial cross-section of the aluminum-clad steel wire 30.
The area ratio of the aluminum-steel cross section of the existing aluminum-clad steel wire 30 is generally 6 to 4, and N is more than 1.5 and less than 4 in this embodiment, so that the area ratio of the aluminum-steel cross section of the aluminum-clad steel wire 30 in this embodiment is more than 6 to 4, the aluminum content in the aluminum-clad steel wire 30 is increased, and the steel content is ensured, because the conductivity of aluminum is better than that of steel, the short-circuit current capacity of the aluminum-clad steel wire 30 can be increased by more than 10% under the condition of the same cross section, and therefore, on the premise of ensuring that the mechanical property of the aluminum-clad steel wire 30 is not changed, the wire resistivity of the aluminum-clad steel wire 30 is reduced, so that the short-circuit current capacity of the optical fiber composite overhead ground wire 100 is further increased, and the transmission performance of the optical fiber 12 of the optical fiber unit 10 can be better protected when a large short-circuit current passes through.
Advantageously, N in this embodiment may preferably be 7/3, and the specific cross-sectional area ratio thereof may be determined according to the quality of steel core 32 in aluminum-clad steel wire 30 actually selected, which need not be described in detail.
Specifically, the aluminum-clad steel wire 30 in the present embodiment may be an aluminum-clad steel wire 30 with high strength and high conductivity, which can simultaneously improve the tensile strength and the conductivity of the aluminum-clad steel wire 30, thereby simultaneously improving the mechanical performance and the short-circuit current capacity of the optical fiber composite overhead ground wire 100.
Referring to fig. 1, in one embodiment of this embodiment, the aluminum layer 33 and the aluminum tube 20 are made of the same aluminum material.
Because the aluminum layer 33 and the aluminum pipe 20 are made of the same aluminum material, electrochemical corrosion caused by contact of different materials is reduced, and the corrosion resistance between the aluminum-clad steel wire 30 and the aluminum pipe 20 is improved, so that the optical fiber composite overhead ground wire 100 of the embodiment can be applied to a high-pollution and high-corrosion use environment, and the application range of the optical fiber composite overhead ground wire 100 is improved.
Referring to fig. 1, in one embodiment of the present embodiment, an optical fiber unit 10 includes a loose tube 13 and a plurality of optical fibers 12. A plurality of optical fibers 12 are provided inside the loose tube 13.
The loose tube 13 can protect the plurality of optical fibers 12 from damage during processing.
Referring to fig. 1, in one embodiment of the present embodiment, the optical fiber unit 10 further includes a waterproof layer 14, and the waterproof layer 14 is provided on an outer surface of the loose tube 13.
The waterproof layer 14 can play a waterproof role in the loose tube 13 to ensure that the optical fiber 12 is not affected by a humid environment, and improve the transmission stability of the optical fiber 12.
Specifically, the waterproof layer 14 of the present embodiment is made of glass yarn.
Referring to fig. 1, in one embodiment of the present embodiment, the optical fiber unit 10 further includes a reinforcing layer 11, and the reinforcing layer 11 is provided on an outer surface of the loose tube 13.
The reinforcing layer 11 can reinforce the loose tube 13 to further improve the mechanical performance of the optical fiber unit 10, and thus the mechanical performance of the optical fiber composite overhead ground wire 100.
Specifically, the reinforcing layer 11 of the present embodiment is made of aramid yarn.
In addition, in another embodiment of this embodiment, a reinforcing layer 11 and a waterproof layer 14 are respectively provided on the outer side of the loose tube 13, and the waterproof layer 14 is provided between the reinforcing layer 11 and the loose tube 13.
Referring to fig. 1, in one embodiment of the present embodiment, the optical fiber unit 10 further includes a thermal insulation layer 15, and the thermal insulation layer 15 is provided on the outer side of the loose tube 13.
Since the aluminum-clad steel wire 30 generates heat when transmitting short-circuit current, the heat of the aluminum-clad steel wire 30 may affect or even damage the loose tube 13, and in this embodiment, the heat insulating layer 15 is additionally disposed outside the loose tube 13, so that a certain isolation effect can be achieved on the heat of the aluminum-clad steel wire 30, and the protection effect on the loose tube 13 and the optical fiber 12 is improved.
Referring to figure 1, in one embodiment of this embodiment, the aluminium tube 20 has six flat surfaces 21, and the angle between two adjacent flat surfaces 21 is 120 °.
The aluminum tube 20 with six flat surfaces 21 can facilitate the processing of the optical fiber composite overhead ground wire 100. Of course, in other embodiments of the present invention, the specific number of the flat surfaces can be adjusted according to actual requirements without specific limitations.
Referring to fig. 2, in one embodiment of the present embodiment, a plurality of aluminum-clad steel wires 30 are provided in multiple layers in a radial direction of the optical fiber unit 10.
The multi-layer aluminum-clad steel wire 30 can further improve the short-circuit current capacity of the optical fiber composite overhead ground wire 100, when the single-layer aluminum-clad steel wire 30 cannot meet the actual demand, a plurality of aluminum-clad steel wires 30 can be set to be multi-layer, because the size of the aluminum-clad steel wire 30 in the radial direction of the optical fiber unit 10 is smaller than the size of the existing aluminum-clad steel wire 30, the size of the existing multi-layer aluminum-clad steel wire 30 can be still smaller after the multi-layer is set, and the outer diameter and the weight of the optical fiber composite overhead ground wire 100 with the size of the existing multi-layer aluminum-clad steel wire 30 can be reduced.
The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. An optical fiber composite overhead ground wire, comprising:
an optical fiber unit;
the aluminum pipe is coated on the outer side of the optical fiber unit, and the outer surface of the aluminum pipe is provided with a plurality of straight surfaces which are sequentially connected in an included angle manner;
the aluminum-clad steel wires are annularly arranged on the outer side of the aluminum pipe, the inner surface of each aluminum-clad steel wire abuts against one straight surface in the radial direction of the optical fiber unit, the outer surfaces of the aluminum-clad steel wires are respectively provided with arc sections, and the arc sections are sequentially connected to form a cylindrical surface.
2. The optical fiber composite overhead ground wire of claim 1, wherein: the aluminum-clad steel wire comprises a steel core and an aluminum layer, and the aluminum layer is coated on the outer side of the steel core.
3. The optical fiber composite overhead ground wire of claim 2, wherein: on the radial section of the aluminum-clad steel wire, the area ratio of the sections of the aluminum layer and the steel core is N, wherein N is more than 1.5 and less than 4.
4. The optical fiber composite overhead ground wire of claim 2, wherein: the aluminum layer and the aluminum pipe are made of the same aluminum material.
5. The optical fiber composite overhead ground wire of claim 1, wherein: the optical fiber unit includes:
loosening the sleeve;
and the optical fibers are arranged on the inner side of the loose tube.
6. The optical fiber composite overhead ground wire of claim 5, wherein: the optical fiber unit further comprises a waterproof layer, and the waterproof layer is arranged on the outer surface of the loose tube.
7. The optical fiber composite overhead ground wire of claim 5, wherein: the optical fiber unit further comprises a reinforcing layer, and the reinforcing layer is arranged on the outer surface of the loose tube.
8. The optical fiber composite overhead ground wire of claim 5, wherein: the optical fiber unit further comprises a heat insulation layer, and the heat insulation layer is arranged on the outer side of the loose tube.
9. The optical fiber composite overhead ground wire of any one of claims 1-8, wherein: the aluminum pipe is provided with six straight surfaces, and the included angle between every two adjacent straight surfaces is 120 degrees.
10. The optical fiber composite overhead ground wire of any one of claims 1-8, wherein: in the radial direction of the optical fiber unit, a plurality of the aluminum-clad steel wires are provided with a plurality of layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220981873.5U CN217333691U (en) | 2022-04-25 | 2022-04-25 | Optical fiber composite overhead ground wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220981873.5U CN217333691U (en) | 2022-04-25 | 2022-04-25 | Optical fiber composite overhead ground wire |
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| Publication Number | Publication Date |
|---|---|
| CN217333691U true CN217333691U (en) | 2022-08-30 |
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| CN202220981873.5U Active CN217333691U (en) | 2022-04-25 | 2022-04-25 | Optical fiber composite overhead ground wire |
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| CN (1) | CN217333691U (en) |
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- 2022-04-25 CN CN202220981873.5U patent/CN217333691U/en active Active
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