VACUUM VALVE

WIPO Patent Application WO/2011/138819

A1

In a vacuum valve, a movable electrode bar is provided with a bellows, and the bellows expands or shrinks in accordance with the movement of the movable electrode bar, so that the airtightness of a vacuum container is maintained. However, there is a problem wherein the bellows buckles when the movable electrode bar is not in contact with another electrode bar. Disclosed is a vacuum valve provided with a vacuum container comprised of an insulation tube (1), and a stationary side end plate (2) and a movable side end plate (3), which are connected to both ends of the insulation tube; a stationary electrode (7) and a movable electrode (8), which are opposed to each other on the inside of the vacuum container; a movable side electrode bar (5), one end of which is secured to the movable electrode (8), and the other end is exposed to the outside of the vacuum container; and a bellows (6) having an accordion portion which expands or shrinks in accordance with the direct movement of the movable side electrode bar (5), wherein a cylindrical bellows support element (12) is secured to the vacuum container so that the accordion portion of the bellows (6) is in contact with the inner side of the bellows support element (12).

JP05328545	SWITCH GEAR
JP03017922	VACUUM CIRCUIT BREAKER
JP2004356109	VACUUM SWITCHING DEVICE

MIKI, Shinichi (7-3Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)

JP2010/003136

November 10, 2011

May 07, 2010

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Mitsubishi Electric Corporation (7-3Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
三菱電機株式会社 (〒10 東京都千代田区丸の内二丁目７番３号 Tokyo, 〒1008310, JP)

H01H33/66

TAKAHASHI, Shogo et al. (7-3Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)

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