CN2484628Y

CN2484628Y - Intensified high-voltage electric probe

Info

Publication number: CN2484628Y
Application number: CN 01231367
Authority: CN
Inventors: 段沛林; 孙再滨
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-07-13
Filing date: 2001-07-13
Publication date: 2002-04-03
Anticipated expiration: 2011-07-13

Abstract

The utility model discloses an intensified high-voltage electric probe as a spare part of the high-voltage circuitbreaker, which is characterized in that the junction surface of the probe and the probe handle is matched by the cone and the taper hole, which is much bigger than the contact area of linear plane and increases the bonding strength of the junction surface. The utility model has the advantages of high mechanical strength, long useful life, credibility, safety, and the phenomenon of the connection dropped has not appeared and has a high performance.

Description

The enhancement mode high-voltage electric contact

Technical field

The utility model belongs to the primary cut-out element, particularly is used for a kind of enhancement mode high-voltage electric contact of primary cut-out.

Background technology

The primary cut-out electrical contact member all adopts the CuW/CrCu integral form both at home and abroad, and the copper-tungsten that is about to anti-electrical arc erosion is made integral contact with the chromium-bronze with excellent conductive capability and favorable elasticity.The bond strength of copper-tungsten and chromium-copper faying face, the contact reliability and the mechanical endurance that are related to dynamic/static contact, it is one of leading indicator of passing judgment on the contact performance, the high-voltage electric contact of present common pattern, the conjunction plane of its two kinds of materials is a flat face, and contact-making surface is little, adds the influence that is subjected to copper-tungsten and two kinds of factors such as material thermal expansion coefficient difference of chromium-copper, the phenomenons such as (faying face disengagements) that often occurs turning around becomes a kind of hidden danger in the high-voltage switch gear.

Summary of the invention

It is big that the purpose of this utility model provides a kind of contact-making surface, the enhancement mode high-voltage electric contact that bonding strength is high.This purpose is achieved in that a kind of enhancement mode high-voltage electric contact, and 1 butt joint of described CuW contact 2 and CrCu contact handle forms, and its interface is cone 3 outer surfaces that stretch out of CrCu contact handle 1 and taper hole 4 inner surfaces of contact 2, and the two must closely cooperate.

The shape of described interface also is circular arc combine with the plane type, tapered tread faying face type.

The utility model compared with prior art, copper content in contact is fixed as under 20% the situation, the high-voltage electric contact faying face joint geometry of the utility model institute optimal design, increased faying face effectively, under identical melting infiltration sintering process conditions, the bond strength of its two kinds of materials strengthens greatly, has the mechanical strength height, life-span is long, sound arcing contact contact performance is good, safe and reliable, does not have and turns around to occur.

Description of drawings

Fig. 1 is the high-voltage electric contact schematic diagram of cone-shaped faying face;

Fig. 2 is the high-voltage electric contact schematic diagram that circular arc combines with the plane;

Fig. 3 (a) (b) is two kinds of tapered tread fitting-type faying face high-voltage electric contact schematic diagrames;

Embodiment

Fig. 1, Fig. 2 and Fig. 3 (a) (b) are depicted as the joint face shape and structure schematic diagram of enhancement mode high-voltage electric contact.Its contact is to be that contact handle 1 butt joint of the contact 2 of CuW and CrCu forms by material.The shape of its contact-making surface cone face 3 as shown in Figure 1 matches with taper hole face 4, carries out infiltration or infiltration sintering in protective atmosphere, and the bonded area of this structure is big, the bonding strength height, and mechanical endurance is long, and the phenomenon that do not turn around as yet is safe and reliable.

Figure 2 shows that the arc surface structure, the cambered surface of its arc surface structure is bigger than flat face contact area;

Fig. 3 (a) (b) is depicted as identical shaped tapered tread face combination, and the length of its broken line is bigger than straight length, and contact area is big, can reach high strength equally, long-life effect.

Claims

1. enhancement mode high-voltage electric contact is characterized in that: described CuW contact 2 and 1 butt joint of CrCu contact handle form, and its interface is cone (3) outer surface that CrCu contact handle (1) stretches out, and taper hole (4) inner surface of contact (2), and the two must closely cooperate.

2. enhancement mode high-voltage electric contact according to claim 1 is characterized in that: the shape of described interface also is circular arc combine with the plane type, tapered tread faying face type.