JPH03130137U

JPH03130137U -

Info

Publication number: JPH03130137U
Application number: JP3912890U
Authority: JP
Priority date: 1990-04-12
Filing date: 1990-04-12
Publication date: 1991-12-26

Description

[Brief explanation of drawings]

第１図は本考案の実施例を示した要部縦断面図
、第２図は同実施例で用いる絶縁シールドの斜視
図、第３図は可動アークコンタクトに絶縁シール
ドを取付ける際の状態を示した断面図、第４図は
可動アークコンタクトの接点部付近の形状を示し
た断面図、第５図は従来の遮断器の要部の縦断面
図である。１……可動導体、１ａ……端部内周面、１ｂ…
…雌ネジ部、３……パツフアシリンダ、４……絶
縁ノズル、６……可動アークコンタクト、６Ａ…
…コンタクト主部、６Ｂ……ネジ結合部、６ａ…
…接点部、６ｂ……雄ネジ部、６ｃ……切り込み
部、６ｅ……バネ受け面、６ｆ……鍔部、６ｇ…
…溝部、７……絶縁シールド、７ａ……内鍔部。 Fig. 1 is a vertical sectional view of the main part showing an embodiment of the present invention, Fig. 2 is a perspective view of the insulation shield used in the embodiment, and Fig. 3 shows the state when the insulation shield is attached to the movable arc contact. FIG. 4 is a cross-sectional view showing the shape of the movable arc contact near the contact portion, and FIG. 5 is a longitudinal cross-sectional view of the main part of a conventional circuit breaker. 1...Movable conductor, 1a...End inner peripheral surface, 1b...
...Female thread part, 3...Puff cylinder, 4...Insulating nozzle, 6...Movable arc contact, 6A...
...Contact main part, 6B...Screw connection part, 6a...
...Contact part, 6b...Male thread part, 6c...Notch part, 6e...Spring receiving surface, 6f...Flame part, 6g...
...Groove portion, 7...Insulation shield, 7a...Inner flange portion.

Claims

[Claims for Utility Model Registration] A hollow movable arc contact having a contact portion at the tip and a male screw portion on the outer periphery of the rear end, and an inner periphery of the end portion surrounding the outer periphery of a portion near the rear end of the movable arc contact. and a female screw portion located deeper than the inner peripheral surface of the end portion and screwed into the male screw portion of the movable arc contact on the tip side, and the inner peripheral surface of the end portion is larger than the female screw portion. a hollow movable conductor having an inner diameter and a stepped portion formed between the inner circumferential surface of the end portion and the female threaded portion; A cylindrical insulation shield placed between the inner peripheral surface of the end portion and the outer peripheral surface of the rear end portion of the movable arc contact, and a spring provided in a portion close to the male threaded portion of the movable arc contact. A disc spring disposed between a receiving surface and a stepped portion of the movable conductor, and a fixed arc contact with which the movable arc contact approaches and separates, the hollow portion of the movable arc contact and the hollow portion of the movable conductor In a gas circuit breaker that forms part of a flow path for arc-extinguishing gas, a flange portion protruding radially outward is provided near the male threaded portion of the movable arc contact, and the male threaded portion of the flange portion is provided with a flange portion projecting outward in the radial direction. An end surface of one end of the side serves as the spring receiving surface, a groove is provided at a position adjacent to the other end of the flange of the movable arc contact, and the insulating shield has a rear end formed with the groove of the movable arc contact. The insulation shield has an inner flange portion that is disposed in a fitted state, and the rear end portion of the insulating shield is provided with a plurality of notches extending in the axial direction so that the rear end portion can be displaced radially outward. A gas circuit breaker characterized by being formed in.