CN114141401A

CN114141401A - Production method of copper-aluminum composite conductor catalytic cable

Info

Publication number: CN114141401A
Application number: CN202010918225.0A
Authority: CN
Inventors: ***; 张逸中; 顾东平
Original assignee: Shanghai Csc Radiation Technology Development Co ltd
Current assignee: Shanghai Csc Radiation Technology Development Co ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2022-03-04

Abstract

The cable conductor adopts a solid aluminum rod, two ends of the solid aluminum rod are welded with the aluminum end surface of the aluminum-copper transition joint by applying an equal-diameter friction welding technology, and the copper end surface of the transition joint is respectively welded with a section of copper stranded wire core (the conductance of the copper stranded wire core is equivalent to that of the aluminum conductor) by using an equal-diameter resistance welding mode. Through the application of the core technology of permeation and fusion among the metal molecules, the aeipathia of creep deformation caused by crimping when a pure aluminum core conductor is used is avoided. In order to improve the welding quality of the aluminum conductor core and the aluminum end face of the aluminum-copper transition joint, the solid aluminum rod reaches the required specification through a continuous casting and rolling process and is annealed into a soft aluminum state, and the electric conductivity is not less than 61 IACS. In order to overcome the defects of inconvenient operation and easy breakage and easy damage when the aluminum conductor (rod) is connected with a distribution box and load equipment, two end parts of the conductor core of the aluminum cable are replaced by copper stranded wires with equivalent electric conductivity values.

Description

Production method of copper-aluminum composite conductor catalytic cable

The technical field is as follows:

the invention relates to a copper-aluminum combined core conductor, and relates to an application technology and a development prospect in the field of medium and low voltage power cables. Specifically, an aluminum conductor is used as a main body, two end parts of the aluminum conductor are respectively welded with the end of an aluminum rod of an aluminum-copper core transition joint, and the end of a copper rod of the transition joint is connected with two sections of copper stranded wires with equivalent electric conductivity values of the aluminum conductor by using an equal-diameter welding technology, so that the phenomenon that the joint is loosened, oxidized and heated due to the creep effect when a pure aluminum conductor core is connected and pressed is avoided, and the electrical accident is caused.

Background art:

as is well known, copper conductors are widely and permanently used in the cable industry in China due to their high electrical conductivity, good processing characteristics and oxidation resistance. However, the aluminum conductor has light weight, good conductivity and low price, and has wide application prospect as long as the problem of creep deformation is solved.

The patent technology of the creep-resistant copper-aluminum core combined conductor is excited in the absolute environment.

The invention content is as follows:

the cable conductor adopts a solid aluminum rod, two ends of the solid aluminum rod are welded with the aluminum end surface of the aluminum-copper transition joint by applying an equal-diameter friction welding technology, and the copper end surface of the transition joint is respectively welded with a section of copper stranded wire core (the conductance of the copper stranded wire core is equivalent to that of the aluminum conductor) by using an equal-diameter resistance welding mode. Through the application of the core technology of permeation and fusion among the metal molecules, the aeipathia of creep deformation caused by crimping when a pure aluminum core conductor is used is avoided.

In order to improve the welding quality of the aluminum conductor core and the aluminum end face of the aluminum-copper transition joint, the solid aluminum rod reaches the required specification through a continuous casting and rolling process and is annealed into a soft aluminum state, and the electric conductivity is not less than 61 IACS.

In order to overcome the defects of inconvenient operation and easy breakage and easy damage when the aluminum conductor (rod) is connected with a distribution box and load equipment, two end parts of the conductor core of the aluminum cable are replaced by copper stranded wires with equivalent electric conductivity values.

In order to optimize the cable manufacturing process, the defects of waste heads, short heads and false heads which are usually generated in the production process are cut off, and high efficiency, energy consumption saving and resource saving are achieved; a copper-aluminum combined conductor core for a cable is supplied by a conductor supply center according to the length of a required order, and a phase color band or a phase color heat-shrinkable tube (the phase color is red, yellow, green, blue and black) is wound on a copper stranded wire welded at two ends. After all welding points are subjected to nondestructive detection, the welding points are connected into a plate by connectors end to end and packaged for delivery. The cable finished product production plant can continuously extrude the plastic in a whole disc without color separation, and achieves a high-speed and large-scale production mode. Before cabling, cables are divided at the head-tail connectors, and are arranged on a tray and cabled: and short heads, waste materials, mold changing, machine head disassembling and material discharging, color matching and other troubles are avoided in the cable production.

Description of the drawings:

the attached drawing is a structure diagram of a copper-aluminum composite conductor

1-solid aluminum rod; 2-aluminum welding surface; 3-an aluminum copper core transition joint; 4-copper welding surface; 5-copper stranded wire; 6-phase band layer: 7-a connector; 8-last one cable conductor; 9-next cable conductor;

the implementation method comprises the following steps:

firstly, two copper stranded wires with phase color band marks are welded on the copper end faces of the copper-aluminum core transition joints, and then the two ends of the solid aluminum rod and the aluminum end faces of the copper-aluminum core transition joints are welded into a whole to form a complete cable core conductor. And connecting the other cores by connectors so as to facilitate continuous extrusion in the subsequent insulating process.

Claims

1. The main conductor of the cable is a solid aluminum rod, and the electric conductivity of the cable is more than or equal to 61IACS after annealing treatment. Two end faces of the solid aluminum rod are respectively welded with two aluminum-copper core transition joints, and the copper stranded wires welded on the copper end faces of the joints are subjected to phase sequence color separation, so that a complete cable conductor core is formed.

2. The sequential color separation on the copper stranded wires can adopt a wrapping or heat-shrinkable tube mode, convenience is brought to single-color extrusion of the cable insulating layer, and the color can be distinguished by means of the colors on the copper stranded wires at the two ends.

3. The cable production mode is changed, the conductor is provided by a conductor supply center, and the welding spots of the aluminum rod, the copper stranded wire and the aluminum-copper core transition joint are delivered after nondestructive detection. Cable manufacturers only need to complete the extrusion of the insulating layer and the subsequent procedures.