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1. 发明专利

DE3105962A1 未知
公开(公告)号：DE3105962A1
公开(公告)日：1981-11-26
申请号：DE3105962
申请日：1981-02-18
申请人： HITACHI LTD
发明人： KISHI TUNEO , TAKEDA YASUHIDE , TSUBAKI TORU , TAKAHASHI TAKESHI
IPC分类号： H01H33/88 , H01H33/02 , H01H33/42 , H01H33/64
摘要： A three-phase combined type circuit breaker is disclosed which comprises a common housing, three-phase interrupting units in said common housing, movable contacts of the interrupting units connected through link mechanisms to operating devices for three phases respectively provided outside of the common housing, the switching operation thus being performed by phase. Rotary shafts are disposed in substantially the same plane in the link mechanisms. Each of the rotary shafts is provided with a connector for the movable contact, a connector for the operating device, and a sealing arrangement positioned between the two connectors for allowing the rotary shaft to rotate while holding the common housing in hermetic condition. This construction makes up a three-phase combined type circuit breaker capable of being operated by phase. The arrangement and construction of the three-phase rotary shafts simplifies maintenance and inspection of the interrupting units and the operating devices.

2. 发明专利

FR2476382A1 未知
公开(公告)号：FR2476382A1
公开(公告)日：1981-08-21
申请号：FR8103092
申请日：1981-02-17
申请人： HITACHI LTD
发明人： KISHI TUNEO , TAKEDA YASUHIDE , TSUBAKI TORU , TAKAHASHI TAKESHI
IPC分类号： H01H33/02 , H01H33/88 , H01H33/42
摘要： A three-phase combined type circuit breaker is disclosed which comprises a common housing, three-phase interrupting units in said common housing, movable contacts of the interrupting units connected through link mechanisms to operating devices for three phases respectively provided outside of the common housing, the switching operation thus being performed by phase. Rotary shafts are disposed in substantially the same plane in the link mechanisms. Each of the rotary shafts is provided with a connector for the movable contact, a connector for the operating device, and a sealing arrangement positioned between the two connectors for allowing the rotary shaft to rotate while holding the common housing in hermetic condition. This construction makes up a three-phase combined type circuit breaker capable of being operated by phase. The arrangement and construction of the three-phase rotary shafts simplifies maintenance and inspection of the interrupting units and the operating devices.

3. 发明专利

JP2002245904A HYDRAULIC DRIVE DEVICE OF BREAKER 失效
公开(公告)号：JP2002245904A
公开(公告)日：2002-08-30
申请号：JP2001045994
申请日：2001-02-22
申请人： HITACHI LTD
发明人： SETO SHINJI , NOGAMI TADAHIKO , TAKEDA YASUHIDE , EBISAWA DAISUKE
IPC分类号： F15B11/00 , H01H33/30
摘要： PROBLEM TO BE SOLVED: To provide a low cost and highly reliable hydraulic drive device for a breaker having a device capable of preventing a pumping action. SOLUTION: This hydraulic drive device for the breaker comprises a cylinder 4 having fluid sealed therein, a piston 5 slidably disposed in the cylinder, a control valve and a circuit opening pilot valve 37 and a circuit closing pilot valve 39 operated so as to open or close the circuits of the cylinder and the piston. In addition, it comprises a check valve 41 and an anti-pumping piston 42 operated so as to close the check valve 41. When the circuit closing pilot valve 39 is open, an abnormality can be detected by oil leakage from a restriction 48. When a circuit open instruction is given with the circuit closing pilot valve open, the anti-pumping piston 42 closes the check valve 41 so that the pumping action is not performed after the circuit opening operation is performed.

4. 发明专利

JP2002093290A FLUID PRESSURE DRIVE UNIT FOR BREAKER 失效
公开(公告)号：JP2002093290A
公开(公告)日：2002-03-29
申请号：JP2000284057
申请日：2000-09-19
申请人： HITACHI LTD
发明人： SETO SHINJI , NOGAMI TADAHIKO , TAKEDA YASUHIDE , EBISAWA DAISUKE , IKEDA ISAMU , KUZUSHIMA YOJI
IPC分类号： F15B11/08 , F15B11/00 , H01H33/34
摘要： PROBLEM TO BE SOLVED: To provide a small-size and low-cost fluid pressure drive unit for a breaker increasing a pilot valve flow rate at the same drive force. SOLUTION: This fluid pressure drive unit for the breaker is provided with a cylinder 4 having fluid sealed therein, a piston 5 slidably disposed in the cylinder, and a channel opening pilot valve 37 and a channel closing pilot valve 39 for opening/closing channels respectively. This drive unit is so constituted that low-pressure rear face chambers are provided in parts of valve elements rear faces of the both pilot valves so as to reduce the force in driving the pilot valves or, if the driving force is same, to increase the flow rate.

5. 发明专利

JPH09161623A GAS-BLAST CIRCUIT BREAKER AND FLUID PRESSURE DRIVE DEVICE THEREOF 失效
公开(公告)号：JPH09161623A
公开(公告)日：1997-06-20
申请号：JP32142595
申请日：1995-12-11
申请人： HITACHI LTD , HITACHI ELECTRIC SYSTEMS
发明人： TAKEDA YASUHIDE , DAIMON GORO , NOGAMI TADAHIKO , KAWAMOTO HIDEO , SADO KOICHI , FUKUOKA MASARU , TSUBAKI TORU
IPC分类号： H01H33/34
摘要： PROBLEM TO BE SOLVED: To eliminate the possibility of a circuit closing operation after opening the circuit even in the case where the circuit opening operation is performed in the imperfect reset condition of a circuit closing pilot valve, and to eliminate the possibility of the pumping operation so as to improve the reliability by providing an unit-pumping valve. SOLUTION: An unti-pumping valve A having a spool 91 is provided, and a drive mechanism 50 of a circuit closing pilot valve 40 is reset by a reset mechanism after a main valve 20 is operated to a circuit closing side at the time of closing the circuit. At this stage, in any condition that a ball valve 41 of the valve 40 is not reset or reset, when the circuit opening command is input in the condition that a circuit closing side operating valve 34 is not reset, a circuit opening pilot drive valve 80 is driven. Consequently, when each valve is operated and the main valve 20 is operated for opening and the circuit closing side operating valve 34 is not reset, the high-pressure fluid is supplied to the valve A, but in the condition that the spool 91 is moved upward, the valve A is driven upward. A flow passage between a secondary side of the valve 34 and a main valve pilot chamber 21 is interrupted, and a main valve spool 22 is operated for opening by the circuit opening operation so as to lower the pressure of the chamber 21. Pumping operation is thereby eliminated so as to improve the reliability.

6. 发明专利

JPH09147695A HYDRAULICALLY OPERATING UNIT 失效
公开(公告)号：JPH09147695A
公开(公告)日：1997-06-06
申请号：JP30244795
申请日：1995-11-21
申请人： HITACHI LTD
发明人： KAWAMOTO HIDEO , DAIMON GORO , TAKEDA YASUHIDE , NOGAMI TADAHIKO , MAEDA HIROSHI , SADO KOICHI , SADAMURA HIROYOSHI , TSUBAKI TORU
IPC分类号： H01H3/24 , H01H33/34
摘要： PROBLEM TO BE SOLVED: To improve the reliability of a hydraulically operating unit by providing a filter for eliminating the foreign material larger than the allowable dimension of an equipment in an upstream side of the equipment, which has a sliding part, among equipments forming an operating unit. SOLUTION: For example, in the condition that a power breaker is closed, a high-pressure liquid chamber 204 and a control liquid chamber 205 for fluid pressure cylinder are high-pressure condition, and a capacity adjusting throttle 101 adjusts the capacity so as to hold a spool 213 of a main control valve at a left position, namely, in the closing condition. A filter 103, which is provided with six holes at a diameter smaller than the hole diameter of the throttle 101 or at the same degree of diameter with the hole diameter of the throttle 101, is provided in the upstream side (high-pressure side) of the throttle 101. Blocking of the throttle due to the foreign material, which is included in the oil, is thereby prevented so as to prevent the wrong operation of a hydraulic operating unit.

7. 发明专利

JPH0721861A GAS BUSHING 失效
公开(公告)号：JPH0721861A
公开(公告)日：1995-01-24
申请号：JP16682793
申请日：1993-07-06
申请人： HITACHI LTD
发明人： TSUJI OSAMU , SUZUKI AKIRA , TAKEDA YASUHIDE , FUKAYA MASAMI
IPC分类号： H01B17/26 , H01B17/36
摘要： PURPOSE:To provide a gas bushing in which the potential distribution of an insulator base part can be improved, and the structure also can be simplified excluding a file control external shield. CONSTITUTION:The head side top end part of a field control internal shield 3 is curved to the outside with a prescribed radius to form a head field control part 3A situated near the back surface, and a lower field control part 3B is formed in a part situated lower than the head field control part 3A and situated upper than the head part of a flange 4. The lower field control part 3B has a ring form having a semicircular section to enclose a central conductor 2. The lower field control part 3B is manufactured separately from the filed control internal shield 3 and then integrated thereto by welding the both to each other, and protruded on the flange side 4 over the head field control part 3A.

8. 发明专利

JPH0467728B2 失效
公开(公告)号：JPH0467728B2
公开(公告)日：1992-10-29
申请号：JP21256183
申请日：1983-11-14
申请人： HITACHI LTD
发明人： DAIMON GORO , TAKEDA YASUHIDE
IPC分类号： H01H33/34

9. 发明专利

JPH01220320A HYDRAULIC OPERATION APPARATUS FOR GAS-BLASTED CIRCUIT BREAKER 失效
公开(公告)号：JPH01220320A
公开(公告)日：1989-09-04
申请号：JP4437188
申请日：1988-02-29
申请人： HITACHI LTD
发明人： TANAKA TOYOICHI , TAKEDA YASUHIDE , NISHIMURA KAZUHIKO , DAIMON GORO
IPC分类号： H01H33/34
摘要： PURPOSE:To minimize an apparatus occupancy rate within an operation box and compact the captioned apparatus by rationally arranging and supportedly fixing a hydraulic pump, accumulator, and pressure switch etc., on the back plate supporting an operation cylinder. CONSTITUTION:An accumulator 5 is fixed to a back plate 4 at the outside of an operation box via a manifold, and installed beneath an operation cylinder in parallel to the drive direction of an operation piston 8 and at the lower part of a link case. A hydraulic pump 9 is arranged to the right side of a triangle's side connecting the operation cylinder 7 and the accumulator by a straight line. The cylinder 7 also is directly and supportedly fixed to the plate 4. A pressure switch 12 is supportedly fixed to a stay 13 supportedly fixed to the plate 4 by welding. This enables the space occupancy rate of the operation box minimum, and the whole circuit-breaker compact. And the vibration at the time of operation becomes the same mode, the stress generated in high pressure piping can be reduced, and reliability improved.

10. 发明专利

JPS61294723A GAS BREAKER FOR POWER 失效
公开(公告)号：JPS61294723A
公开(公告)日：1986-12-25
申请号：JP13602485
申请日：1985-06-24
申请人： HITACHI LTD
发明人： TAKEDA YASUHIDE , KISHI TSUNEO
IPC分类号： H01H33/34 , H01H33/56

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