Copper and aluminum connection structure with flame retardant insulation bush

Abstract

The invention relates to a copper and aluminum connection structure with a flame retardant insulation bush. In the connection structure, cold welding and pressure welding manners are simultaneously adopted for fixedly connecting a copper conductor joint section of a copper conductor and an aluminum conductor joint section of an aluminum conductor into a copper and aluminum conductor joint section; the copper and aluminum conductor joint section and the peripheries of the copper conductor joint section and the aluminum conductor joint section which are adjacent to the copper and aluminum conductor joint section are coated by heat-shrinkable insulation bushes with a good flame retardant property; and the tension resistance strength of the copper and aluminum conductor joint section is not less that 200 N. The copper and aluminum connection structure with the flame retardant insulation bush can ensure that the two different metal conductors can well contact, have the characteristics of good strength and good insulation property, and can not be broken, carbonized and burnt easily in operation for a long time.

Description

technical field [0001] The invention relates to a copper-aluminum connection structure, in particular to a copper-aluminum connection structure with a flame-retardant insulating sleeve. It belongs to the technical field of wire and cable. Background technique [0002] In the household transmission and distribution lines of urban and rural power grids in my country, the connection between the copper wire and the aluminum wire is wound, that is, two different metal wires are wound by hand, and then coated with insulating tape or self-adhesive tape on the outside. This traditional connection structure has the following problems in actual use: (1) Good contact between two different metal wires cannot be guaranteed. (2) Since the wire is bent many times during winding, the strength is reduced, and the wire will be broken at the joint after long-term operation. (3) Insulating tape and self-adhesive tape are made of fiber and colloidal materials. When the temperature of the conne...

AI Technical Summary

Problems solved by technology

This traditional connection structure has the following problems in actual use: (1) can not guarantee good contact between two different metal wires

(2) Since the wire is bent many times during winding, the strength is reduced, and the wire will be broken at the joint after long-term operation

(3) Insulating tape and self-adhesive tape are made of fiber and colloidal materials. When the temperature of the connecting wire rises, it is easy to carbonize, and it is easy to cause combustion when it encounters an open flame or reaches a certain temperature. It is very easy to lose the insulation effect, causing leakage and electric shock hazards

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