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公开(公告)号：US10916394B2
公开(公告)日：2021-02-09
申请号：US16645667
申请日：2018-07-30
申请人： Hitachi, Ltd.
发明人： Toshiaki Sakuyama , Hajime Urai , Masanao Terada , Ryoichi Shiobara , Takahiro Nishimura , Makoto Hirose , Yuichiro Yamane
摘要： A gas circuit breaker includes a gas suppresser composed of a protruded portion which is formed on a horizontal surface facing an exhaust cylinder of a shaft guide and which forms a gap between itself and the exhaust cylinder and an enlarged portion which is adjacent to the protruded portion and where a gap to the exhaust cylinder is enlarged so that the shaft guide, which operates along an inner circumferential surface of the exhaust cylinder, which is provided to an inner circumferential portion of a movable side main conductor and is provided to outer circumferences of an exhaust shaft and an operation rod, and couples the operation rod with the exhaust shaft, is axially adjacent to a sliding member that slides along the exhaust cylinder with no space to the exhaust cylinder and suppresses discharge of heated and pressurized insulating gas.
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公开(公告)号：US10699863B2
公开(公告)日：2020-06-30
申请号：US16275365
申请日：2019-02-14
申请人： Hitachi, Ltd.
摘要： In order to solve the above-described problems, a gas circuit breaker of the present invention has an insulating nozzle disposed so as to cover an inner surface of a coupling member such that an end surface of the coupling member and an end surface of the insulating nozzle form one surface (the end surface of the coupling member is flush with the end surface of the insulating nozzle), in order to suppress contact between a high-temperature and high-pressure gas generated by an arc and the coupling member coupling the insulating nozzle and a driving rod.
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公开(公告)号：US10354821B2
公开(公告)日：2019-07-16
申请号：US15900822
申请日：2018-02-21
申请人： Hitachi, Ltd.
发明人： Toshiaki Sakuyama , Ryoichi Shiobara , Hajime Urai , Makoto Hirose , Masanao Terada , Takahiro Nishimura
摘要： To provide a gas circuit breaker designed to achieve further improvement in interruption performance for a small to medium current. The gas circuit breaker according to the present invention includes: an operation mechanism 1; a heat puffer chamber 19; a machine puffer chamber 32; a release valve 34; a movable main contact 5 and movable arc contact 11; a stationary main contact 6 and stationary arc contact 12; a movable-side leading conductor 14; and a stationary-side leading conductor 15, and features: a separation cylinder 21 for radially partitioning the heat puffer chamber 19; an inner circumferential flow path 24 formed on an inner circumferential side of the separation cylinder 21; and a check valve 22 for opening or closing a communication hole 23.
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公开(公告)号：US10991529B2
公开(公告)日：2021-04-27
申请号：US16647647
申请日：2018-08-03
申请人： Hitachi, Ltd.
摘要： An object is to enhance direct-current insulating performance of a gas-blast circuit breaker. The gas-blast circuit breaker includes: a pair of main contacts disposed in a gas tank to face each other and configured to operate for opening and closing a circuit; a pair of arc contacts disposed to face each other and configured to operate for opening and closing the circuit, the arc contacts being disposed coaxially with the main contacts at locations close to the centers of the main contacts, respectively; and an elastic electrically conductive material disposed on an outer surface of an insulating nozzle facing an inner surface of one of the main contacts.
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