CN2458720Y

CN2458720Y - Static conducting rod coupling device for vacuum circuit breaker

Info

Publication number: CN2458720Y
Application number: CN 00265144
Authority: CN
Inventors: 张吉顺
Original assignee: BEIJING BEIKAI ELECTRICAL Co Ltd
Current assignee: BEIJING BEIKAI ELECTRICAL Co Ltd
Priority date: 2000-12-11
Filing date: 2000-12-11
Publication date: 2001-11-07
Anticipated expiration: 2010-12-11

Abstract

The utility model relates to a static conducting rod coupling device for a vacuum circuit breaker, which is mainly used for the occasion needing a breaker with frequent action. The upper end of a static conductive rod (4) is a convex spherical surface or a concave spherical surface; one spherical surface conducting ring (3) is arranged between the static conductive rod and an upper outgoing line (1); the lower end of the spherical surface conducting ring is a concave spherical surface or a convex spherical surface; the lower end of the spherical surface conducting ring tightly contacted with the convex spherical surface or the concave spherical surface of the upper end of the static conductive rod (4). Because the connection of the spherical surface has self centering function, the vacuum arc-extinguishing chamber can automatically adjust the position thereof; thereby, the breakage of a corrugated pipe caused by radial force is eliminated; the utility model can be used for the breaker with frequent action; the service life of vacuum breaker is increased.

Description

Vacuum circuit-breaker static conductive rod coupling arrangement

The utility model belongs to the power switch parts, is mainly used in the power switchgears such as vacuum circuit-breaker of frequent movement.

The bellows that connects as welded seal with moving conductive rod in the vacuum circuit-breaker is the main parts in decision vacuum circuit-breaker life-span, and its thin-walled ripple struction has determined it can only bear certain axial force, and the ability of bearing radial force is very little.In case moving conductive rod gives it with radial load bigger or frequent effect, will break very soon or snap, and the vacuum state of vacuum interrupter is damaged, vacuum circuit-breaker also just can't be worked.It is owing to produce error in circuit breaker processing and the assembling unavoidably that the radial load of moving conductive rod produces one of reason, make dynamic and static contact can not guarantee to do completely parallel plane contact, and contact-making surface has inclination slightly, will make moving conductive rod produce radial load with the fix static conductive rod that connects of the last outlet of rigidity.This radial load does not still have too big influence for general purpose vacuum circuit-breaker, but will shorten bellows greatly so that the life-span of entire product for the vacuum circuit-breaker as frequent control operations of needs such as metallurgy.

The design's purpose is exactly to connect the problem that makes moving conductive rod easily produce radial load and then harm bellows owing to static conductive rod and last outlet fix for solving existing vacuum circuit-breaker, and a kind of static conductive rod coupling arrangement that does not make moving conductive rod produce collision contact radial load is provided.

The vacuum circuit-breaker static conductive rod coupling arrangement that the design provides is made up of the last outlet and the joint bolt of static conductive rod, static conductive rod upper end, and different with existing vacuum circuit-breaker static conductive rod connecting mode is:

Static conductive rod upper end be protruding sphere or concave spherical, its with last outlet between have one with static conductive rod on protruding sphere or concave spherical surface to do tight that contact, the lower end of sphere be the sphere conducting ring of concave spherical surface or protruding sphere shape.

Operating principle of the present utility model is: utilize the sphere contact to connect the function that has self-centering or claim to regulate automatically centering, the vacuum interrupter that makes vacuum circuit-breaker to moving conductive rod because the radial load that a variety of causes produces can be made corresponding oscillation adjustment, the radial load of moving conductive rod band just no longer acts on the bellows like this, thereby has eliminated the destruction of radial load to bellows.

This shows, the utility model has utilized the self-regulation effect of sphere contact dexterously, " flexibility " but that make rigid attachment between the last outlet of vacuum interrupter and rigidity become the automatic fine tuning pivot angle connects, thereby eliminated the destruction of moving conductive rod radial load, and then the life-span of having improved vacuum circuit-breaker greatly to bellows.

Below in conjunction with description of drawings embodiment of the present utility model.

Fig. 1 is existing vacuum circuit-breaker static conductive rod coupling arrangement schematic diagram;

Fig. 2 is the utility model " vacuum circuit-breaker static conductive rod coupling arrangement " schematic diagram;

In Fig. 1,1 is last outlet, and 2 is joint bolt, and 4 is static conductive rod, and 5 is fixed contact, and 6 is moving contact, and 7 is moving conductive rod, and 8 is bellows, and 9 is vacuum interrupter.As seen from the figure, the static conductive rod upper end is a planar shaped, directly is fixedly connected by joint bolt and last outlet, and the radial load that moving conductive rod has inevitably can not promote the vacuum interrupter swing, can only act on the bellows " tough ".

In Fig. 2,3 is the sphere conducting ring, the same Fig. 1 of all the other numbered blocks.As seen from the figure, the static conductive rod of the utility model embodiment upper end is protruding sphere shape, and sphere conducting ring lower end is a concave spherical, and a pair of convex-concave sphere closely contacts.When producing radial load on the moving conductive rod, its energy is absorbed in the swing that sphere connects under the Self-centering Action by vacuum interrupter, and the radial load that bellows is subjected to alleviates greatly, thereby has protected ripple battalion effectively, has improved the life-span of vacuum circuit-breaker.

The utility model has been manufactured experimently out sample and has been tested, and makes the product mechanical action life-span bring up to 120,000 times by 10,000 times, thereby has improved greatly the useful life of the vacuum circuit-breaker of working under the frequent movement occasion.

Claims

1, vacuum circuit-breaker static conductive rod coupling arrangement is made up of the last outlet (1) and the joint bolt (2) of static conductive rod (4), static conductive rod (4) upper end, it is characterized in that:

Static conductive rod (4) upper end be protruding sphere or concave spherical, its with last outlet (1) between have one with static conductive rod (4) on protruding sphere or concave spherical surface to do tight that contact, the lower end of sphere be the sphere conducting ring (3) of concave spherical surface or protruding sphere shape.