Winding support type expanded-diameter bus

Abstract

The utility model provides a winding support type expanded-diameter bus, which belongs to the technical field of transmission line leads and comprises a support tube, a Z-shaped single-wire stranded conductor layer and a trapezoidal single-wire stranded conductor layer, the Z-shaped single-wire stranded conductor layer is arranged outside the support tube, and the trapezoidal single-wire stranded conductor layer is arranged outside the Z-shaped single-wire stranded conductor layer; the supporting pipe is a hollow circular pipe formed by spirally winding a stainless steel band, and the hollow circular pipe is provided with a spiral gap part in the axial direction. According to the winding support type expanded-diameter bus, the product structure is simple, large-scale extrusion equipment is not needed, the production is easy to realize, the stainless steel band winding pipe is used for supporting, the flexibility is improved, and enough supporting force is ensured; and the conductor layer adopts the combination of the high-strength heat-resistant aluminum alloy Z-shaped single wires and the soft aluminum trapezoidal single wires, so that the bus structure is round, compact and smooth, and has better conductivity.

Description

Technical Field

[0001] The utility model belongs to the technical field of transmission line conductors, and particularly relates to a winding support type expanded diameter busbar. Background Art

[0002] In the power system, the busbar is used for connecting various voltage distribution devices in a power station or a substation, and plays the role of collecting, distributing and transmitting electric energy. As the current transmission capacity of the busbar is large, tubular expanded diameter busbars are usually used to reduce the skin effect, and reduce the influence of electric field, magnetic field and corona on the environment. The patent with the utility model patent application number CN 203826104 U discloses an aluminum tube support type heat-resistant expanded diameter busbar for a substation. The expanded diameter busbar uses a corrugated tube as a support, and a conductive layer is arranged on the outer periphery of the expanded diameter support tube. A trapezoidal or Z-shaped heat-resistant aluminum alloy single wire is wound around the corrugated tube. The patent with the patent application number CN201758043U discloses an aluminum tube support type heat-resistant aluminum alloy expanded diameter busbar. The expanded diameter busbar uses a corrugated aluminum tube as a support, and a heat-resistant aluminum alloy single wire is wound around the corrugated aluminum tube. The cross-section of the heat-resistant aluminum alloy single wire is circular. When multiple aluminum alloy single wires with circular cross-sections are wound around the outer periphery of the corrugated aluminum tube, adjacent two aluminum alloy single wires are in line contact, that is, there is a gap between them, which leads to a change in the curvature radius of the outer surface of the busbar, and further leads to uneven electric field strength on the surface of the busbar. Summary of the Invention

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art, and provide a winding support type expanded diameter busbar, which realizes an expanded diameter busbar with stable structure, round and compact shape, easy bending, large current carrying capacity, and high anti-corona and radio interference levels.

[0004] To achieve the above technical purposes, the technical solution adopted by the utility model is:

[0005] A winding support type expanded diameter busbar, which includes a support tube, a Z-shaped single wire stranded conductor layer and a trapezoidal single wire stranded conductor layer. The Z-shaped single wire stranded conductor layer is arranged outside the support tube, and the trapezoidal single wire stranded conductor layer is arranged outside the Z-shaped single wire stranded conductor layer;

[0006] The support tube is spirally wound by a stainless steel strip into a hollow circular tube, and a spiral gap part is arranged along the axial direction of the hollow circular tube.

[0007] Preferably, in the winding support type expanded diameter busbar, the stainless steel strip is a non-magnetic material, the thickness of the stainless steel strip is 0.5 - 2.5 mm, and the width is 25 - 150 mm.

[0008] Preferably, in the winding support type expanded diameter busbar, the width of the spiral gap part is 4 - 15 mm.

[0009] Preferably, for the winding support type expanded diameter busbar, the Z-shaped single-wire stranded conductor layer is stranded by a plurality of aluminum alloy Z-shaped single wires, and adjacent aluminum alloy Z-shaped single wires cooperate with each other structurally.

[0010] Preferably, for the winding support type expanded diameter busbar, the rotation direction of the spiral gap part is opposite to the stranding direction of the aluminum alloy Z-shaped single wire stranding.

[0011] Preferably, for the winding support type expanded diameter busbar, the trapezoidal single-wire stranded conductor layer is stranded by a plurality of soft aluminum trapezoidal single wires.

[0012] Preferably, for the winding support type expanded diameter busbar, the winding support type expanded diameter busbar is a hollow conductor, and ventilation holes are arranged at both ends of the busbar.

[0013] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are as follows:

[0014] For the winding support type expanded diameter busbar of the present invention, the product structure is simple, no large extrusion equipment is required, and production is easy to achieve. The stainless steel strip winding tube is used as a support, which improves flexibility and ensures sufficient support force; the conductor layer adopts a combination of high-strength heat-resistant aluminum alloy Z-shaped single wires and soft aluminum trapezoidal single wires, ensuring that the busbar structure is round, tight, and smooth, and has good electrical conductivity. Description of the Drawings

[0015] Figure 1 It is a schematic end face structure diagram of the winding support type expanded diameter busbar of the present invention.

[0016] Figure 2 It is a cross-sectional view of the winding support type expanded diameter busbar of the present invention. Detailed Embodiments

[0017] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "inside, outside", "above, below", "front, back", etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the protection scope of the present invention.

[0018] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Such as Figure 1-2, a winding-supported expanded-diameter busbar, comprising a support tube 1, a Z-shaped single-wire stranded conductor layer 2 and a trapezoidal single-wire stranded conductor layer 3. The Z-shaped single-wire stranded conductor layer 2 is disposed outside the support tube 1, and the trapezoidal single-wire stranded conductor layer 3 is disposed outside the Z-shaped single-wire stranded conductor layer 2;

[0020] The support tube 1 is spirally wound by a stainless steel strip 1-1 into a hollow circular tube. A spiral gap portion 1-2 is provided along the axial direction of the hollow circular tube. The function of the spiral gap portion 1-2 is to facilitate the bending of the busbar.

[0021] The stainless steel strip 1-1 is a non-magnetic material. The thickness of the stainless steel strip 1-1 is 0.5 - 2.5 mm, and the width is 25 - 150 mm; the width of the spiral gap portion 1-2 is 4 - 15 mm; the Z-shaped single-wire stranded conductor layer 2 is stranded by a number of high-strength heat-resistant aluminum alloy Z-shaped single wires 2-1 with a conductivity of 55% IACS. The adjacent aluminum alloy Z-shaped single wires 2-1 cooperate with each other in structure. The Z-shaped single-wire stranding has an interlocking function to ensure the roundness and tightness of the busbar structure. The strength of the high-strength heat-resistant aluminum alloy is 240 MPa, which ensures the overall tensile force of the busbar; the rotation direction of the spiral gap portion 1-2 is opposite to the stranding direction of the aluminum alloy Z-shaped single wires 2-1; the trapezoidal single-wire stranded conductor layer 3 is stranded by a number of annealed soft aluminum trapezoidal single wires 3-1 with a conductivity of 63% IACS. The soft aluminum has softness, making the outer trapezoidal single-wire stranded conductor layer 3 more compliant during stranding, and the surface of the busbar smoother. The smooth surface can reduce the levels of corona and radio interference; the 63% IACS conductivity endows the busbar with good electrical conductivity. The winding-supported expanded-diameter busbar is a hollow conductor. Ventilation holes are provided at both ends of the busbar, and a natural convection of hot air can be formed in the inner diameter air duct, having a good heat dissipation effect.

[0022] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the examples, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A winding support type expanded diameter busbar, characterized in that: It comprises a support tube (1), a Z-shaped single-wire twisted conductor layer (2) and a trapezoidal single-wire twisted conductor layer (3), wherein the Z-shaped single-wire twisted conductor layer (2) is arranged outside the support tube (1), and the trapezoidal single-wire twisted conductor layer (3) is arranged outside the Z-shaped single-wire twisted conductor layer (2); The support tube (1) is formed by spirally winding a stainless steel strip (1-1) into a hollow circular tube, and a spiral gap portion (1-2) is provided in the hollow circular tube along the axial direction.

2. The winding support type expanded diameter busbar according to claim 1, characterized in that: The stainless steel strip (1-1) is a non-magnetic material, and has a thickness of 0.5-2.5 mm and a width of 25-150 mm.

3. The winding support type expanded diameter busbar according to claim 1, characterized in that: The width of the spiral gap portion (1-2) is 4-15 mm.

4. The winding support type expanded diameter busbar according to claim 1, characterized in that: The Z-shaped single-wire twisted conductor layer (2) is formed by twisting a plurality of aluminum alloy Z-shaped single wires (2-1), and adjacent aluminum alloy Z-shaped single wires (2-1) cooperate with each other in structure.

5. The winding support type expanded diameter busbar according to claim 4, characterized in that: The rotation direction of the spiral gap portion (1-2) is opposite to the twisting direction of the aluminum alloy Z-shaped single wire (2-1).

6. The winding support type expanded diameter busbar according to claim 1, characterized in that: The trapezoidal single-wire twisted conductor layer (3) is formed by twisting a plurality of soft aluminum trapezoidal single wires (3-1).

7. The winding support type expanded diameter busbar according to claim 1, characterized in that: The wound support type expanded diameter busbar is a hollow conductor, and ventilation holes are set at both ends of the busbar.

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