A high-performance aluminum alloy cable connection terminal

Abstract

The invention relates to a copper-aluminum transition terminal used for cable joints in low-voltage power grids and industrial distribution networks, in particular to a high-performance aluminum alloy cable connection terminal. The structure includes a wiring lug and a connecting pipe, the connecting pipe is a hollow pipe, and the key point is: it also includes a copper-aluminum transition part arranged between the wiring lug and the connecting pipe. The invention provides a high-performance aluminum alloy cable connection terminal. The structure is additionally equipped with a copper-aluminum transition part, which not only reduces the amount of pure copper, reduces the cost, but also improves the mechanical strength and thermal stability of this part, and reduces high temperature. Reduce the possibility of creep and improve the overall performance of the cable connection terminal.

Description

technical field [0001] The invention relates to a copper-aluminum transition terminal used for cable joints in low-voltage power grids and industrial distribution networks, in particular to a high-performance aluminum alloy cable connection terminal. Background technique [0002] With the rapid development of my country's economic construction, the demand for electricity in various industries continues to increase, the market space for the wire and cable industry is huge, and the application of aluminum alloy cables in the cable market is becoming more and more extensive. Common cable connection terminals include a lug and a connecting pipe. One end of the lug is sheet-shaped, the other end is cylindrical, and the connecting pipe is a hollow pipe. The cylindrical shape of the lug and the connecting pipe are integrally cast. However, this structure has the following defects : First, the contact area between the wiring nose and the connecting pipe is small, which is prone to b...

AI Technical Summary

Problems solved by technology

Common cable connection terminals include a lug and a connecting pipe. One end of the lug is sheet-shaped, the other end is cylindrical, and the connecting pipe is a hollow pipe. The cylindrical shape of the lug and the connecting pipe are integrally cast. However, this structure has the following defects : First, the contact area between the wiring nose and the connecting pipe is small, which is prone to breakage; second, the safety of the cable is mainly limited by the stability of the terminal connection. At present, aluminum alloy cables mainly use copper-aluminum transition terminals, and the material of the wiring nose It is T2 grade electrical copper, and the connecting pipe is made of pure aluminum instead of aluminum alloy material, which leads to potential safety hazards in the process of use after the aluminum terminal is crimped with the aluminum alloy conductor. At the same time, the mechanical strength of the aluminum conductor is low, and the welding performance Poor, high contact resistance, limited popularization and application in engineering projects, and because of the poor thermal stability of aluminum conductors, creep is prone to occur under long-term use at high temperatures, resulting in frequent failures of aluminum conductor power cables in engineering applications; The connecting tube is used for low-voltage power cables with special-shaped cable conductors, such as fan-shaped, tile-shaped, and semi-circular. Because 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. The gap between the outer surface and the inner wall of the connecting pipe is uneven, which brings hidden dangers to the long-term stable operation of the cable

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