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Creep-resistant aluminum alloy copper-aluminum transition terminal and preparation method thereof

A transition terminal and aluminum alloy technology, which is applied in the direction of metal/alloy conductors, contact manufacturing, multi-core cable end parts, etc., can solve problems such as poor welding performance, large contact resistance, and restrictions on popularization and application, and achieve improved thermal stability. The effect of safety and convenient construction

Active Publication Date: 2015-01-28
航天电工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. The mechanical strength of pure aluminum conductors is low, the welding performance is poor, and the contact resistance is large, so the promotion and application in engineering projects is limited; moreover, due to the poor creep resistance of pure aluminum conductors, aluminum conductor power cables are frequently used in engineering applications error occured
[0008] 1. 1350 grade common aluminum is prone to creep under the effect of constant temperature changes for a long time, causing irreversible changes in its structural dimensions
[0009] 2. Cylindrical connecting tubes are used for special-shaped conductors of low-voltage power cables (such as fan-shaped, tile-shaped, and semi-circular). Since the shapes of the two are too different, even if plastic measures are taken during the joint, it is difficult to ensure that the conductor is rounded. , resulting in an uneven gap between the outer surface of the conductor and the inner wall of the connecting pipe, which brings hidden dangers to the long-term stable operation of the cable

Method used

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  • Creep-resistant aluminum alloy copper-aluminum transition terminal and preparation method thereof
  • Creep-resistant aluminum alloy copper-aluminum transition terminal and preparation method thereof
  • Creep-resistant aluminum alloy copper-aluminum transition terminal and preparation method thereof

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Effect test

Embodiment 1

[0039] As shown in Figures 1 to 4, a creep-resistant aluminum alloy copper-aluminum transition terminal includes: a copper nose 1, an aluminum connecting pipe 2 connected to the copper nose 1, and the cross-sectional shape of the inner hole of the aluminum connecting pipe 2 is circular shape.

[0040] A method for preparing a creep-resistant aluminum alloy copper-aluminum transition terminal, the steps of which are as follows:

[0041] 1) Copper nose 1 is machined using T2 grade electrical copper rods according to the designed specifications and drawings;

[0042] 2) Use creep-resistant aluminum alloy to cast aluminum connecting pipes, and the mass percentage of chemical components of creep-resistant aluminum alloy is:

[0043] Si: 0.10, Fe: 0.50, Cu0.: 0.20, Mg: 0.03, Zn: 0.03

[0044] B: 0.02, the sum of other elements ≤ 0.1, Al balance.

[0045] 3) The copper nose 1 and the aluminum connecting pipe 2 are welded together by a friction welding process;

[0046] 4) After t...

Embodiment 2

[0048] As shown in Figures 1 to 4, a creep-resistant aluminum alloy copper-aluminum transition terminal includes: a copper nose 1, an aluminum connecting pipe 2 connected to the copper nose 1, and the cross-sectional shape of the inner hole of the aluminum connecting pipe 2 is fan-shaped .

[0049] 1) Copper nose 1 is machined using T2 grade electrical copper rods according to the designed specifications and drawings;

[0050] 2) Use creep-resistant aluminum alloy to cast aluminum connecting pipes, and the mass percentage of chemical components of creep-resistant aluminum alloy is:

[0051] Si: 0.10, Fe: 0.50, Cu0.: 0.20, Mg: 0.03, Zn: 0.03

[0052] B: 0.02, the sum of other elements ≤ 0.1, Al balance.

[0053] 3) The copper nose 1 and the aluminum connecting pipe 2 are welded together by a friction welding process;

[0054] 4) After trimming the copper-aluminum transition terminal, pack it into the warehouse.

Embodiment 3

[0056] As shown in Figures 1 to 4, a creep-resistant aluminum alloy copper-aluminum transition terminal includes: a copper nose 1, an aluminum connecting pipe 2 connected to the copper nose 1, and the cross-sectional shape of the inner hole of the aluminum connecting pipe 2 is tile shape.

[0057] The preparation method of the anti-creep aluminum alloy copper-aluminum transition terminal of the present invention, its steps are as follows:

[0058] 1) Copper nose 1 is machined using T2 grade electrical copper rods according to the designed specifications and drawings;

[0059] 2) Use creep-resistant aluminum alloy to cast aluminum connecting pipes, and the mass percentage of chemical components of creep-resistant aluminum alloy is:

[0060] Si: 0.08, Fe: 0.75, Cu: 0.15, Mg: 0.01, Zn: 0.01

[0061] B: 0.009, the sum of other elements ≤ 0.1, Al balance.

[0062] 3) The copper nose 1 and the aluminum connecting pipe 2 are welded together by a friction welding process;

[0063]...

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Abstract

The invention provides a creep-resistant aluminum alloy copper-aluminum transition terminal, comprising a copper nose and an aluminum connection pipe, wherein a connection hole is formed on the copper nose; the aluminum connection pipe is made of a creep-resistant aluminum alloy material; the inner holes of the aluminum connection pipe respectively are in a fan-shaped structure, a tile-shaped structure, a semicircular structure and a round structure; and the creep-resistant aluminum alloy copper-aluminum transition terminal is prepared by adopting a friction welding manner. The creep-resistant aluminum alloy copper-aluminum transition terminal provided by the invention has simple structure, and can greatly improve the stability of a cable joint and reduce the construction cost of the cable joint simultaneously.

Description

technical field [0001] The present invention relates to a creep-resistant aluminum alloy copper-aluminum transition terminal, in particular to a copper-aluminum transition joint used in low-voltage power grids and industrial distribution network cable joints and a preparation method thereof. Background technique [0002] With the rapid development of my country's economic construction, the demand for electricity in various industries continues to increase, and the market space for the wire and cable industry is huge. However, copper and aluminum conductors, which are the main components in the wire and cable product structure, have their own shortcomings that are difficult to overcome, which are described as follows: [0003] 1. The density of pure copper conductor is high (8.89g / cm 3 ), and copper resources are scarce in the world, and my country is a typical copper-poor country. Since 2004, my country's refined copper consumption has jumped to the first place in the worl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R11/11H01B1/02H01R43/16
Inventor 罗福安张静段书文黄建
Owner 航天电工集团有限公司
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