CN209843279U

CN209843279U - Aluminum alloy flexible stranded wire

Info

Publication number: CN209843279U
Application number: CN201920902369.XU
Authority: CN
Inventors: 杨怀; 叶恺; 鞠霖; 周瑾
Original assignee: Wuxi Huaneng Electric Cable Co Ltd
Current assignee: Wuxi Huaneng Electric Cable Co Ltd
Priority date: 2019-06-14
Filing date: 2019-06-14
Publication date: 2019-12-24
Anticipated expiration: 2029-06-14

Abstract

The utility model belongs to the technical field of substation equipment, a flexible stranded conductor of aluminum alloy is related to, including many heart yearns as the inner core, the at least two-layer conductor hank layer of surface spiral transposition of many heart yearns, every the heart yearn all includes many first single lines of spiral transposition in proper order, every layer the conductor hank layer all includes many second single lines of spiral transposition in proper order, and the direction of transposition of adjacent two-layer second single line is opposite, and the ratio of the transposition pitch and the diameter of the second single line in the outermost conductor hank layer is 3 ~ 4, and the ratio of the transposition pitch and the diameter of the second single line in all the other conductor hank layers is 5 ~ 7, and the ratio of the transposition pitch and the diameter of the first single line in the heart yearn is 8 ~ 12, and the ratio of the pitch and the diameter of each conductor hank layer is less than the pitch and the diameter of next-door layer, and this.

Description

Aluminum alloy flexible stranded wire

Technical Field

The utility model belongs to the technical field of substation equipment, a flexible stranded conductor of aluminum alloy is related to.

Background

In high voltage transformer stations and high voltage converter stations, the electrical contacts of high voltage distribution equipment need to be connected by cables with the same current-carrying cross section as the cables in the high voltage power grid. The distance between the electrical contacts of the high-voltage distribution equipment is small, the current-carrying capacity is large, creep exists between the electrical contacts when some high-voltage distribution equipment operates, and flexible cables are usually adopted to be in elastic connection with the power grid engineering hardware fittings in a matching mode.

The connection cable between the electrical contacts of the high-voltage switchgear assembly should have: good flexibility, stable structure, no deformation and crack during bending, creep resistance and high-temperature resistance thermal stability. In the prior art, patent CN105931702A discloses a flexible aluminum stranded wire with small pitch and a manufacturing method thereof. The small-pitch flexible aluminum stranded wire is provided with a core wire, and the core wire is divided into a plurality of layers of stranded aluminum wires. Patent CN10178321A discloses a method for manufacturing small-pitch aluminum stranded wires, which is to assemble heat-treated aluminum wires on a fork-type stranding machine to manufacture small-pitch aluminum stranded wires. The patents all adopt pure aluminum as a conductor material, and the pure aluminum has weak anti-fatigue, thermal stability and creep resistance, so that the reliability of the cable product is reduced.

Disclosure of Invention

The utility model is directed to the above problem, a flexible stranded conductor of aluminum alloy is provided, and the compliance of this stranded conductor is better.

According to the technical scheme of the utility model, the flexible stranded wire of aluminum alloy is characterized in that the flexible stranded wire comprises a plurality of core wires serving as an inner core, at least two layers of conductor stranded layers are helically stranded on the outer surfaces of the core wires, each core wire comprises a plurality of first single wires which are sequentially helically stranded, each layer of conductor stranded layer comprises a plurality of second single wires which are sequentially helically stranded, the stranding directions of the two adjacent layers of second single wires are opposite, the ratio of the stranding pitch to the diameter of the second single wire in the outermost layer of conductor stranded layer is 3 ~ 4, the ratio of the stranding pitch to the diameter of the second single wires in the rest of conductor stranded layers is 5 ~ 7, the ratio of the stranding pitch to the diameter of the first single wire in the core wire is 8 ~ 12, and the ratio of the pitch to the diameter of the middle stranded layer in each conductor stranded layer is smaller than the ratio of the pitch to the diameter of the adjacent inner layer.

As a further improvement of the present invention, the diameter of the first element wire is 0.25 ~ 1.5.5 mm.

As a further improvement of the present invention, the diameter of the second single wire is 2 ~ 5 mm.

As a further improvement of the utility model, the intensity of the first single line and the second single line is 90 ~ 120MPa, the conductivity is more than 61% IACS, and the elongation is more than 10%.

The technical effects of the utility model reside in that: the utility model discloses the heart yearn strand of strands in the product is by many aluminum alloy single line combinations, and the conductive layer adopts the little pitch transposition for the stranded conductor is softer. The 8030 aluminum alloy is adopted by the conductor, so that the thermal stability, the fatigue resistance and the creep resistance of the stranded wire are improved.

Drawings

Fig. 1 is a schematic view of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In fig. 1 and 2, a core wire 1, a first single wire 1-1, a conductor strand layer 2, and the like are included.

As shown in fig. 1 and 2, the utility model relates to an aluminum alloy flexible stranded wire, including many heart yearns 1 as the inner core, the surface spiral transposition of many heart yearns 1 is at least two-layer conductor stranding layer 2, every heart yearn 1 all includes many first single lines 1-1 of spiral transposition in proper order, every layer conductor stranding layer 2 all includes many second single lines of spiral transposition in proper order, adjacent two-layer second single line's transposition direction is opposite, the ratio of the transposition pitch of the second single line in outermost conductor stranding layer 2 and diameter is 3 ~ 4, the ratio of the transposition pitch of the second single line in the other conductor stranding layers and diameter is 5 ~ 7, the ratio of the transposition pitch of the first single line in heart yearn 1 and diameter is 8 ~ 12, the ratio of the pitch of the outer layer stranding layer in each conductor stranding layer and diameter is less than the ratio of the pitch and diameter of closely adjacent inner layer stranding layer.

The diameter of the first element wire 1-1 was 0.25 ~ 1.5.5 mm, and the diameter of the second element wire was 2 ~ 5 mm.

The first element wire 1-1 and the second element wire have a strength of 90 ~ 120MPa, an electrical conductivity of more than 61% IACS, and an elongation of more than 10%.

The product of the utility model is simple in structure, reasonable, in the actual production process, can add alloy element's such as iron, copper, magnesium, tombarthite 8030 aluminum alloy in the conductor according to actual conditions needs.

The utility model discloses 1 strand of heart yearn among the flexible stranded conductor of aluminum alloy in the product is by many aluminum alloy single line combinations, and conductor stranding layer 2 adopts the short-pitch transposition, makes the utility model discloses the product is softer, adopts 8030 aluminum alloy to improve the thermal stability, fatigue resistance, the creep resistance of stranded conductor.

Claims

1. The aluminum alloy flexible stranded wire is characterized by comprising a plurality of core wires (1) serving as inner cores, wherein at least two conductor stranded layers (2) are helically stranded on the outer surfaces of the core wires (1), each core wire (1) comprises a plurality of first single wires (1-1) which are sequentially and helically stranded, each conductor stranded layer (2) comprises a plurality of second single wires which are sequentially and helically stranded, the stranding directions of the two adjacent layers of second single wires are opposite, the ratio of the stranding pitch to the diameter of the second single wires in the outermost conductor stranded layer (2) is 3 ~ 4, the ratio of the stranding pitch to the diameter of the second single wires in the rest conductor stranded layers is 5 ~ 7, the ratio of the stranding pitch to the diameter of the first single wires in the core wires (1) is 8 ~ 12, and the ratio of the pitch to the diameter of the outer stranded layer in each conductor stranded layer is smaller than the ratio of the pitch to the diameter of the adjacent inner stranded layer.

2. The aluminum alloy flexible strand as set forth in claim 1, wherein the diameter of said first element wire (1-1) is 0.25 ~ 1.5.5 mm.

3. The aluminum alloy flexible strand as set forth in claim 1, wherein said second element wire has a diameter of 2 ~ 5 mm.

4. The aluminum alloy flexible stranded wire of claim 1, wherein the strength of the first element wire (1-1) and the second element wire is 90 ~ 120MPa, the conductivity is more than 61% IACS, and the elongation is more than 10%.