High-performance aluminum alloy cable connection terminal

Abstract

The invention relates to a copper-aluminum transition terminal applied to a low-voltage power network and an industrial power distribution network cable connector, in particular to a high-performance aluminum alloy cable connection terminal. The structure comprises a terminal lug and a connection pipe, wherein the connection pipe is a hollow pipe; and according to the key point, the high-performance aluminum alloy cable connection terminal also comprises a copper-aluminum transition part which is arranged between the terminal lug and the connection pipe. The invention further provides the high-performance aluminum alloy cable connection terminal. The copper-aluminum transition part is added to the structure, so that the use level of pure copper is reduced; the cost is reduced; the mechanical strength and the heat stability of the part can also be improved; the possibility of creepage at a high temperature is reduced; and the overall performance of the cable connection terminal is improved.

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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