Carbon fiber composite core aluminum alloy overhead conductor

Abstract

The utility model discloses a carbon fiber composite core aluminum alloy overhead conductor, belongs to the technical field of overhead conductors, and mainly solves the technical problems that in the prior art, a thin ring-shaped aluminum alloy area in an overhead conductor wraps a cylindrical carbon fiber composite core rod area, the sectional area of the aluminum alloy area is small, the single-time power transmission quantity is small, and the power transmission efficiency is low. Meanwhile, the overall structural strength of the conductor is not comprehensive enough, and the tensile strength is enhanced only, so that the performance of the overhead conductor is affected, the overhead conductor comprises a carbon fiber composite core rod, and the carbon fiber composite core rod is formed by compounding carbon fibers, glass fibers and epoxy resin. A plurality of aluminum alloy single wires are arranged on the surface of the carbon fiber composite core rod at equal intervals, the aluminum alloy single wires are annularly arranged, a lining shielding layer is arranged outside the aluminum alloy single wires, an outer sheath is fixed to the outer surface of the lining shielding layer, a hollow groove is formed in the outer sheath in a penetrating mode, and a supporting framework is embedded in the hollow groove. The supporting framework is made of nylon materials.

Description

Technical Field

[0001] The utility model relates to the technical field of overhead conductors, and more specifically, to an overhead conductor with a carbon fiber composite core and an aluminum alloy. Background Art

[0002] As a carrier of power transmission, overhead transmission lines occupy an extremely important position in transmission lines. Since the transmission lines were put into operation, the main type of overhead transmission lines has been steel-core aluminum stranded wire. With the development of new material technology, new composite materials such as carbon fiber are used to replace the steel core in traditional conductors to form a new overhead transmission line conductor. Its outstanding features are light weight, tensile resistance, good thermal stability, small sag, strong current carrying capacity per unit area and corrosion resistance. It has good application prospects in transmission lines in county-level power grids.

[0003] However, there are various types of overhead conductors in the prior art. For example, utility model patent CN203673870U relates to a carbon fiber composite core thermal aluminum alloy overhead conductor. The utility model is provided with a carbon fiber composite core rod area and an aluminum alloy area, including a carbon fiber composite core rod area located at the inner core position and an aluminum alloy area located at the outer layer position. In the cross section of the conductor, the outer periphery of the carbon fiber composite core rod area and the outer periphery of the aluminum alloy area are concentric circles. The disclosed carbon fiber composite core thermal aluminum alloy overhead conductor has the advantages of large capacity, low resistance, low loss, low sag, high operating temperature, corrosion resistance, energy saving and environmental protection.

[0004] The overhead conductor uses the carbon fiber composite core rod area as a load-bearing unit and the aluminum alloy area as a power transmission unit. However, the thin ring-shaped aluminum alloy area in the overhead conductor is coated on the outside of the cylindrical carbon fiber composite core rod area. The cross-sectional area of ​​the aluminum alloy area is small, and the single power transmission amount is small. At the same time, the overall structural strength of the conductor is not comprehensive enough, and it is only enhanced from the tensile strength. These two aspects affect the performance of the overhead conductor. In order to avoid this phenomenon, it is very necessary to design a carbon fiber composite core aluminum alloy overhead conductor. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In order to achieve the above object, the utility model provides a carbon fiber composite core aluminum alloy overhead conductor, which is achieved by the following specific technical means:

[0007] A carbon fiber composite core aluminum alloy overhead conductor comprises a carbon fiber composite core rod, a plurality of aluminum alloy single wires are equidistantly arranged on the surface of the carbon fiber composite core rod, the plurality of aluminum alloy single wires are arranged in a ring shape, an inner lining shielding layer is arranged outside the plurality of aluminum alloy single wires, an outer sheath is fixed to the outer surface of the inner lining shielding layer, a hollow groove is penetrated inside the outer sheath, a support frame is embedded inside the hollow groove, and the support frame is made of nylon material.

[0008] Preferably, the carbon fiber composite core rod is composed of a carbon fiber rod, a glass fiber layer and an epoxy resin layer. The surface of the carbon fiber rod is provided with a glass fiber layer, the cross-sectional shape of the glass fiber layer is annular, and the outer surface of the tubular glass fiber layer is covered with an epoxy resin layer. The carbon fiber composite core rod serves as the load-bearing structure of the entire overhead conductor.

[0009] Preferably, the support frame is a frame warp and a frame weft, a plurality of frame warp are embedded in the hollow groove, a plurality of frame weft are sleeved on the surface of the frame warp, and the support frame is fixed in the outer sheath.

[0010] Preferably, the surface of the aluminum alloy single wire is coated with a heat-resistant insulation layer, and the heat-resistant insulation layer is made of thermoplastic polyimide material.

[0011] Preferably, the gap between the carbon fiber composite core rod and the inner liner shielding layer is filled with a filling layer, and the filling layer is made of polyethylene material, and the filling layer is coated on the outside of the plurality of aluminum alloy single wires and the heat-resistant insulation layer.

[0012] Preferably, a plurality of fixing strips are equidistantly arranged on the inner surface of the annular liner shielding layer, and the plurality of fixing strips are embedded in the filling layer, and tensile steel wire ropes are sleeved inside the fixing strips.

[0013] Preferably, the cross-sectional shape of the inner lining shielding layer is annular, the inner lining shielding layer is made of metal material, and the inner lining shielding layer is used to shield electromagnetic interference.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] A plurality of aluminum alloy single wires are arranged in a ring shape outside the epoxy resin layer, so that the aluminum alloy single wire is used as the power transmission unit of the entire overhead conductor. Multiple groups of aluminum alloy single wires form an aluminum alloy area. Compared with the thin ring-shaped aluminum alloy area of ​​the existing conductor, the cross-sectional area is larger and the single power transmission amount is greater, so as to ensure the good performance of the overhead conductor. At the same time, the excellent properties of carbon fiber, glass fiber and epoxy resin are utilized to improve the impact resistance and tensile strength of the conductor, and the excellent mechanical strength and toughness of nylon skeleton material are utilized to support the outer sheath through a supporting skeleton composed of skeleton warp and skeleton weft, so as to improve the compressive strength of the entire overhead conductor, thereby enhancing the structural strength of the conductor in many aspects, thereby further improving the performance of the entire overhead conductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 is a schematic diagram of the structure of the outer sheath;

[0019] Figure 3 is a schematic diagram of the structure of a carbon fiber composite core;

[0020] Figure 4 It is a schematic diagram of the structure of the supporting skeleton;

[0021] Figure 5 It is a schematic diagram of the local structure;

[0022] Figure 6 This is an enlarged schematic diagram of point A.

[0023] In the figure: 1. Carbon fiber composite core rod; 2. Carbon fiber rod; 3. Glass fiber layer; 4. Epoxy resin layer; 5. Aluminum alloy single wire; 6. Heat-resistant insulation layer; 7. Filling layer; 8. Lining shielding layer; 9. Outer sheath; 10. Hollow groove; 11. Support skeleton; 12. Fixed sleeve strip; 13. Tensile steel wire rope; 14. Skeleton warp; 15. Skeleton weft. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0027] like Figure 1 , Figure 2 as well as Figure 3 As shown, it is a schematic diagram of the structure of the carbon fiber composite core aluminum alloy overhead conductor in this embodiment. In this embodiment, the aluminum alloy overhead conductor can be used as a new type of carrier for power transmission, and has the outstanding characteristics of light weight, tensile resistance, good thermal stability, small sag, strong current carrying capacity per unit area and corrosion resistance. The overhead conductor includes a carbon fiber rod 2 and an aluminum alloy single wire 5. The surface of the carbon fiber rod 2 is provided with a glass fiber layer 3, and the cross-sectional shape of the glass fiber layer 3 is annular. The outer surface of the tubular glass fiber layer 3 is covered with an epoxy resin layer 4, and the outer surface of the epoxy resin layer 4 is equidistantly provided with a plurality of aluminum alloy single wires. 5. The surface of the aluminum alloy single wire 5 is coated with a heat-resistant insulating layer 6, and the heat-resistant insulating layer 6 is made of thermoplastic polyimide material. The carbon fiber composite core serves as the load-bearing structure of the entire overhead conductor, so that the conductor has preliminary tensile resistance and impact resistance. At the same time, a plurality of aluminum alloy single wires 5 are arranged in a ring shape outside the epoxy resin layer 4. The aluminum alloy single wire 5 serves as the power transmission unit of the entire overhead conductor. Multiple groups of aluminum alloy single wires 5 form an aluminum alloy area. Compared with the thin ring-shaped aluminum alloy area of ​​the existing conductor, the cross-sectional area is larger and the single power transmission amount is more, so as to ensure that the overhead conductor has good performance.

[0028] It is worth noting that the carbon fiber rod 2, glass fiber layer 3 and epoxy resin layer 4 in this embodiment constitute a carbon fiber composite core rod 1, which is formed by stretching the carbon fiber material and the glass fiber material, impregnating them in the epoxy resin material, and curing them at high temperature. The composite core rod is thus formed by utilizing the excellent properties of carbon fiber, glass fiber and epoxy resin to improve the impact resistance and tensile strength of the conductor.

[0029] like Figure 4 As shown, in this embodiment, a plurality of aluminum alloy single wires 5 are provided with an inner lining shielding layer 8 on the outside, and the cross-sectional shape of the inner lining shielding layer 8 is annular. The inner lining shielding layer 8 is made of metal material. By using the setting of the inner lining shielding layer 8, electromagnetic interference can be effectively shielded.

[0030] like Figure 4 and Figure 5 As shown, in this embodiment, an outer sheath 9 is fixed to the outer surface of the inner lining shielding layer 8, a hollow groove 10 is penetrated inside the outer sheath 9, a plurality of skeleton warp wires 14 are embedded inside the hollow groove 10, and a plurality of skeleton weft wires 15 are sleeved on the surface of the skeleton warp wires 14.

[0031] It is worth noting that the skeleton warp 14 and the skeleton weft 15 in this embodiment constitute a support skeleton 11, and the support skeleton 11 is made of nylon material. The support skeleton 11 is fixed in the outer sheath 9. Since the nylon skeleton material has good toughness and excellent mechanical strength, the outer sheath 9 is supported by the support skeleton 11, and the bending ability of the outer sheath 9 can also be adapted to improve the compressive strength of the entire overhead conductor, thereby enhancing the structural strength of the conductor in many aspects, thereby further improving the performance of the entire overhead conductor.

[0032] like Figure 3 As shown, in this embodiment, the gap between the inner lining shielding layer 8 and the carbon fiber composite core rod 1 is filled with a filling layer 7, and the filling layer 7 is made of polyethylene material. The filling layer 7 is coated on the outside of several aluminum alloy single wires 5 and the heat-resistant insulation layer 6. The filling layer 7 serves as an auxiliary structure, which can make the structure of the entire overhead conductor more stable and its interior more compact.

[0033] like Figure 6 As shown, in this embodiment, a plurality of fixed sleeves 12 are equidistantly arranged on the inner surface of the annular lining shielding layer 8, and the plurality of fixed sleeves 12 are embedded in the filling layer 7, and tensile steel wire ropes 13 are sleeved inside the fixed sleeves 12. By arranging multiple groups of tensile steel wire ropes 13, the tensile strength of the conductor is increased.

[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbon fiber composite core aluminum alloy overhead conductor, comprising a carbon fiber composite core rod (1), characterized in that: A plurality of aluminum alloy single wires (5) are equidistantly arranged on the surface of a carbon fiber composite core rod (1); the plurality of aluminum alloy single wires (5) are arranged in a ring shape; an inner lining shielding layer (8) is arranged outside the plurality of aluminum alloy single wires (5); an outer sheath (9) is fixed to the outer surface of the inner lining shielding layer (8); a hollow groove (10) is arranged through the interior of the outer sheath (9); a support frame (11) is embedded in the interior of the hollow groove (10); and the support frame (11) is made of nylon material.

2. The carbon fiber composite core aluminum alloy overhead conductor according to claim 1, characterized in that: The carbon fiber composite core rod (1) comprises a carbon fiber rod (2), a glass fiber layer (3) and an epoxy resin layer (4); the surface of the carbon fiber rod (2) is provided with a glass fiber layer (3); the cross-sectional shape of the glass fiber layer (3) is annular; the outer surface of the tubular glass fiber layer (3) is coated with an epoxy resin layer (4); the carbon fiber composite core rod (1) serves as a load-bearing structure for the entire overhead conductor.

3. The carbon fiber composite core aluminum alloy overhead conductor according to claim 1, characterized in that: The support frame (11) comprises frame warps (14) and frame wefts (15); a plurality of frame warps (14) are embedded in the hollow groove (10); a plurality of frame wefts (15) are sleeved on the surface of the frame warps (14); and the support frame (11) is fixed in the outer sheath (9).

4. The carbon fiber composite core aluminum alloy overhead conductor according to claim 1, characterized in that: The surface of the aluminum alloy single wire (5) is coated with a heat-resistant insulation layer (6), and the heat-resistant insulation layer (6) is made of thermoplastic polyimide material.

5. The carbon fiber composite core aluminum alloy overhead conductor according to claim 1, characterized in that: The gap between the carbon fiber composite core rod (1) and the inner lining shielding layer (8) is filled with a filling layer (7), and the filling layer (7) is made of a polyethylene material. The filling layer (7) is coated on the outside of a plurality of aluminum alloy single wires (5) and a heat-resistant insulation layer (6).

6. The carbon fiber composite core aluminum alloy overhead conductor according to claim 1, characterized in that: The inner surface of the annular lining shielding layer (8) is provided with a plurality of fixed sleeves (12) at equal intervals, and the plurality of fixed sleeves (12) are embedded in the filling layer (7), and the interior of the fixed sleeves (12) is provided with tensile steel wire ropes (13).

7. The carbon fiber composite core aluminum alloy overhead conductor according to claim 1, characterized in that: The cross-sectional shape of the inner lining shielding layer (8) is annular; the inner lining shielding layer (8) is made of a metal material; and the inner lining shielding layer (8) is used to shield electromagnetic interference.

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