A low-wind-pressure conductor

Abstract

The present invention discloses a low-wind-pressure conductor, which comprises a conductor, an inner-layer aluminum conductor and an outer-layer aluminum conductor; the conductor comprises a bundled conductor; the inner-layer aluminum conductor is coated on the periphery of the conductor; the outer-layer aluminum conductor comprises a plurality of special-shaped single-wire aluminum conductors, and the plurality of special-shaped single-wire aluminum conductors are stranded and coated on the periphery of the inner-layer aluminum conductor; one side of each special-shaped single-wire aluminum conductor in contact with the external environment is an arc structure. The low-wind-pressure conductor disclosed by the present invention can effectively improve the wind resistance of the bundled conductor in the overhead transmission line under high wind speeds and reduce the wind resistance coefficient.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission lines, and in particular, to a low-wind-pressure conductor. Background Art

[0002] In overhead transmission lines, the wind pressure on the conductor accounts for about 50% - 70% of the total wind pressure on the entire transmission line. The wind pressure on the conductor has a significant impact on the strength design of the tower foundation and the tower body. Reducing the wind pressure on the conductor is of great significance for reducing the line cost and improving the safety of line operation. Scholars and manufacturers in various countries have developed low-wind-pressure conductors with surface structures different from traditional conductors, but their actual applications are few. The surface structures of low-wind-pressure conductors are diverse, but they are all based on single-wire designs and do not consider the shielding effect of bundled conductors. In actual engineering, the conductors can be arranged in two-bundle, four-bundle, etc. The ability of low-wind-pressure conductors considering the shielding effect to reduce the wind resistance coefficient is weak, and the wind resistance coefficient has an extremely important impact on the performance, cost, and life of overhead transmission lines. The low-wind-pressure conductors of the existing technology have weak wind resistance and cannot maintain the safe and stable operation of overhead transmission lines better. Summary of the Invention

[0003] Aiming at the above problems, the purpose of the present invention is to provide a low-wind-pressure conductor with a simple structure and the ability to effectively reduce the wind pressure on the conductor.

[0004] To achieve the above purpose, an embodiment of the present invention provides a low-wind-pressure conductor, which includes a conductor, an inner-layer aluminum conductor, and an outer-layer aluminum conductor.

[0005] The conductor includes a bundled conductor.

[0006] The inner-layer aluminum conductor is coated on the periphery of the conductor.

[0007] The outer-layer aluminum conductor includes multiple special-shaped single-wire aluminum conductors, and the multiple special-shaped single-wire aluminum conductors are stranded and coated on the periphery of the inner-layer aluminum conductor.

[0008] One side of each special-shaped single-wire aluminum conductor in contact with the external environment is an arc structure.

[0009] As an improvement of the above solution, the conductor is a steel wire.

[0010] As an improvement of the above solution, the centers of the arc structures are all located on the same reference circle.

[0011] As an improvement of the above solution, the radius of the low-wind-pressure conductor is jointly determined by the dimensions of the conductor, the inner-layer aluminum conductor, and the outer-layer aluminum conductor, specifically:

[0012] The radius of the low-voltage wind conductor is equal to the sum of the radius of the coordinate circle corresponding to the arc structure and the radius of the coordinate circle corresponding to the center of the arc structure.

[0013] As an improvement to the above solution, multiple of the special-shaped single-wire aluminum conductors are all made of aluminum wire, heat-resistant aluminum alloy wire, and ultra-heat-resistant aluminum-magnesium-silicon alloy wire.

[0014] As an improvement to the above solution, the diameter of the low-voltage wind conductor is 18 mm to 26 mm, and the number of splits of the bundled conductor is single split and double split.

[0015] As an improvement to the above solution, the diameter of the low-voltage wind conductor is 27 mm to 33 mm, and the number of splits of the bundled conductor is double split and quadruple split.

[0016] As an improvement to the above solution, the split spacing of the bundled conductor is 500 mm.

[0017] As an improvement to the above solution, the split spacing of the bundled conductor is 450 mm.

[0018] The low-wind-pressure conductor provided by the present invention effectively combines conductors of different structures, an inner-layer aluminum conductor, and an outer-layer aluminum conductor. Considering the shielding effect of the bundled conductor, different stranded conductors are used, combined with a specific arc trapezoidal structure, so that the conductors of the arc trapezoidal structure form a certain roughness on the surface of the conductor, the reflux area is relatively small. For bundled conductors with different numbers of splits, the differential pressure resistance of the conductors of the entire transmission line is reduced, the total resistance of the conductors is small, and the resistance coefficient is also correspondingly reduced. It can effectively improve the wind resistance of the bundled conductors in the overhead transmission line at high wind speeds and reduce the wind resistance coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic cross-sectional structure diagram of a low-voltage wind conductor provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic structural diagram of a low-voltage wind conductor provided by an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a split model simulation of a low-voltage wind conductor provided by an embodiment of the present invention;

[0023] Figure 4It is a schematic diagram showing the relationship between the wind resistance coefficient and the wind speed of a low-voltage wind conductor provided by an embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram showing the relationship between the wind resistance coefficient and the wind speed of a low-voltage wind conductor provided by an embodiment of the present invention. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] An embodiment of the present invention provides a low-wind-pressure conductor. Please refer to Figure 1 , which is a schematic cross-sectional structure diagram of a low-voltage wind conductor provided by an embodiment of the present invention, and it includes a conductor, an inner-layer aluminum conductor, and an outer-layer aluminum conductor.

[0027] Specifically, the conductor includes a bundled conductor; the inner-layer aluminum conductor is coated on the periphery of the conductor; the outer-layer aluminum conductor includes multiple special-shaped single-wire aluminum conductors, and the multiple special-shaped single-wire aluminum conductors are stranded and coated on the periphery of the inner-layer aluminum conductor; one side of each special-shaped single-wire aluminum conductor in contact with the external environment is an arc structure.

[0028] The low-wind-pressure conductor provided by the embodiment of the present invention effectively combines conductors, inner-layer aluminum conductors, and outer-layer aluminum conductors with different structures. Considering the shielding effect of the bundled conductor, different stranded conductors are used, combined with a specific arc trapezoidal structure, so that the conductors with an arc trapezoidal structure form a certain roughness on the surface of the conductor, the backflow area is relatively small, for bundled conductors with different numbers of bundles, the pressure difference resistance of the conductors of the entire transmission line is reduced, the total resistance of the conductor is small, and the resistance coefficient is also correspondingly reduced. It can effectively improve the wind resistance of the bundled conductor in the overhead transmission line at high wind speeds and reduce the wind resistance coefficient.

[0029] It should be noted that the shape and structure of the outer-layer aluminum conductor are determined by the radius of the conductor, the curvature radius of the arc, the center of the arc, and the included angle between the centers of adjacent arcs. In the embodiment of the present invention, the inventor has conducted multiple tests and obtained the optimal arc trapezoidal structure. As Figure 1 shown, each of the special-shaped single-wire aluminum conductors of the outer-layer aluminum conductor is an arc trapezoidal structure, and one side of each special-shaped single-wire aluminum conductor in contact with the external environment is an arc.

[0030] Specifically, please refer to Figure 2, which is a schematic structural diagram of a low-voltage wind conductor provided by an embodiment of the present invention. Among them, one side of each of the shaped single-wire aluminum conductors in contact with the external environment is an arc structure, that is, the outer arc shown in the figure, and one side of each of the shaped single-wire aluminum conductors in contact with the inner-layer aluminum conductor is the inner arc shown in the figure. As Figure 2 shown, the radius of the coordinate circle corresponding to the inner arc is R1, the radius of the coordinate circle corresponding to the outer arc is R3, the central angle between the coordinate circles corresponding to adjacent outer arcs is θ, and the radius of the coordinate circle corresponding to the center of the outer arc is R2, and the radius of the entire low-voltage wind conductor is R.

[0031] Preferably, in the above embodiment, the conductor is a steel wire.

[0032] Preferably, in the above embodiment, the centers of the arc structures are all located on the same reference circle. As Figure 2 shown, the centers of the arc structures of each of the shaped single-wire aluminum conductors in contact with the external environment are all located on the same reference circle.

[0033] Preferably, in the above embodiment, the radius of the low-voltage wind conductor is jointly determined by the dimensions of the conductor, the inner-layer aluminum conductor and the outer-layer aluminum conductor, specifically:

[0034] The radius of the low-voltage wind conductor is equal to the sum of the radius of the coordinate circle corresponding to the arc structure and the radius of the coordinate circle corresponding to the center of the arc structure. In this embodiment, as Figure 2 shown, the value of the radius R of the entire low-voltage wind conductor is jointly determined by the radius R3 of the coordinate circle corresponding to the outer arc and the radius R2 of the coordinate circle corresponding to the center of the outer arc. Specifically, R2 + R3 = R. Preferably, R2 > R1, so that the entire arc structure is generated by the mutual constraint relationship between the radius R of the conductor, the radius R3 of the outer arc, the radius R2 of the coordinate circle corresponding to the position of the center of the outer arc, the radius R1 of the coordinate circle corresponding to the position of the inner arc, and the central angle between adjacent outer arcs.

[0035] Preferably, in the above embodiment, multiple shaped single-wire aluminum conductors are all made of aluminum wire, heat-resistant aluminum alloy wire and super heat-resistant aluminum-magnesium-silicon alloy wire.

[0036] Preferably, in the above embodiment, the diameter of the low-voltage wind conductor is 18 mm to 26 mm, and the number of splits of the bundled conductor is single split and double split.

[0037] Preferably, in the above embodiment, the diameter of the low-voltage wind conductor is 27 mm to 33 mm, and the number of splits of the bundled conductor is double split and quadruple split.

[0038] Preferably, in the above embodiment, the split spacing of the bundled conductor is 500 mm.

[0039] Preferably, in the above embodiment, the splitting distance of the bundled conductor is 450 mm.

[0040] As an example of the low-voltage wind conductor provided by the present invention, the radius R1 of the coordinate circle corresponding to the inner arc is set to 10 mm, the radius R2 of the coordinate circle corresponding to the center of the outer arc is set to 12.55 mm, and the radius R3 of the coordinate circle corresponding to the outer arc is set to 1.45 mm. The central angle θ between the centers of the coordinate circles corresponding to adjacent outer arcs is 22.5°. A 4-bundled conductor model is established, and the simulation range length is more than 10 times the radius of the conductor. Specifically, please refer to Figure 3 , which is the structural schematic diagram of the bundled conductor simulation model. Please refer to Figure 4 , which is the schematic diagram of the relationship between the wind resistance coefficient and the wind speed under this structure.

[0041] As an example of the low-voltage wind conductor provided by the present invention, the radius R1 of the coordinate circle corresponding to the inner arc is set to 10 mm, the radius R2 of the coordinate circle corresponding to the center of the outer arc is set to 11.9 mm, and the radius R3 of the coordinate circle corresponding to the outer arc is set to 2.1 mm. Specifically, please refer to Figure 5 , which is the schematic diagram of the relationship between the wind resistance coefficient and the wind speed at this time. By analogy, by selecting a suitable radius range and combining with the manufacturing process, a low-wind-pressure conductor structure with a significantly reduced wind resistance coefficient can be obtained. This structure takes into account the shielding effect of the bundled conductor and can better reduce the wind resistance coefficient during actual operation.

[0042] The low-wind-pressure conductor provided by the present invention effectively combines conductors with different structures, an inner-layer aluminum conductor, and an outer-layer aluminum conductor. Considering the shielding effect of the bundled conductor, different stranded conductors are used and combined with a specific arc trapezoid structure, so that the conductors of the arc trapezoid structure form a certain roughness on the surface of the conductor, and the backflow area is relatively small. For bundled conductors with different splitting numbers, the differential pressure resistance of the entire transmission line conductor is reduced, the total resistance of the conductor is small, and the resistance coefficient is also correspondingly reduced. It can effectively improve the wind resistance of the bundled conductor in the overhead transmission line at high wind speeds and reduce the wind resistance coefficient.

[0043] The above-disclosed are only some preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A low-wind-pressure conductor, characterized in that, Comprising: A conductor, an inner layer aluminum conductor, and an outer layer aluminum conductor; The conductor includes a bundled conductor; The conductor is a steel wire; The inner layer aluminum conductor is coated around the conductor; The outer layer aluminum conductor includes multiple special-shaped single-wire aluminum conductors, and the multiple special-shaped single-wire aluminum conductors are stranded and coated around the outer periphery of the inner layer aluminum conductor; each of the multiple special-shaped single-wire aluminum conductors is made of an aluminum wire, a heat-resistant aluminum alloy wire, and a super heat-resistant aluminum-magnesium-silicon alloy wire; One side of each of the special-shaped single-wire aluminum conductors in contact with the external environment is an arc structure; The centers of the arc structures are all located on the same reference circle; the radius of the low-voltage wind conductor is jointly determined by the dimensions of the conductor, the inner layer aluminum conductor, and the outer layer aluminum conductor, specifically: the radius of the low-voltage wind conductor is equal to the sum of the radius of the coordinate circle corresponding to the arc structure and the radius of the coordinate circle corresponding to the center of the arc structure.

2. The low-wind-pressure conductor according to claim 1, characterized in that, The diameter of the low-voltage wind conductor is 18 mm to 26 mm, and the number of splits of the bundled conductor is single split and double split.

3. The low-wind-pressure conductor according to claim 1, wherein The diameter of the low-voltage wind conductor is 27 mm to 33 mm, and the number of splits of the bundled conductor is double split and quadruple split.

4. The low-wind-pressure conductor according to claim 2 or 3, wherein The split spacing of the bundled conductor is 500 mm.

5. The low-wind-pressure conductor according to claim 2 or 3, characterized in that The split spacing of the bundled conductor is 450 mm.

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