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51. 发明专利

JPH03236128A GAS BREAKER 失效
公开(公告)号：JPH03236128A
公开(公告)日：1991-10-22
申请号：JP2961090
申请日：1990-02-13
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , SEKI YASUHARU , TSUKUSHI MASANORI , KUROSAWA YUKIO
IPC分类号： H01H33/91
摘要： PURPOSE:To improve breaking capacity by making the flow passage of a gas breaker, where the opening of the flow passage from the hollow nozzle provided in a needle is arranged at the side of a cylinder, into the shape of a Laval nozzle. CONSTITUTION:A cylinder 7 is provided, being divided into a needle base 7a, where a main needle 2 and a needle 4 are placed, and a buffer cylinder 10, and air intake ports are provided apart in three places, and flow passage 9 and openings 10 are provided in three places between the air intake ports. By enlarging the area of the air intake port 14 for blasting gas from a buffer chamber 13 to arc as far as possible and making the passage 9 into the shape of a Labal tube to secure the area of the passage 9, it has solved the magnitudes of the area of the air intake port 14 and that of the passage 9 in contradictory relation. That is, by putting it in the shape of a Laval nozzle, the gas flow speed can be increased, and a limited space can be used effectively, and by the increase of gas flow, interrupting capacity can be improved.

52. 发明专利

JPH03205722A GAS-BLAST CIRCUIT-BREAKER 失效
公开(公告)号：JPH03205722A
公开(公告)日：1991-09-09
申请号：JP55390
申请日：1990-01-08
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , SEKI YASUHARU , TSUKUSHI MASANORI
IPC分类号： H01H33/91 , H01H1/00 , H01H33/70 , H01H33/915
摘要： PURPOSE:To make inspection, disjoining, and assembly of a circuit-breaking part easy by composing a gas-discharging guide of a plurality of divided guide parts and making the tip part of the gas-discharging guide movable. CONSTITUTION:A gas-discharging guide is divided and the tip part of the gas- discharging guide is made movable from a hand hole 17, etc., of a circuit- breaking part container 18. That is, the gas-discharging guide is divided into the guide parts 19, 20 and the divided parts are connected with a bolt 21. In this way, the gas-discharging guide is divided into the guide parts 19, 20 and made movable and thus inspection of an insulated nozzle 5, an outer circumference of a cylinder 11, an open part 10, etc., from the hand hole 17 as well as disjoining and assembly of a stator 3, a mover 4, the insulated nozzle 5, etc., becomes easy. Consequently, circuit-breaking part inspection from outside of the circuit-breaking part container, disjoining, and assembly become easy.

53. 发明专利

JPH0210618A GAS BREAKER 失效
公开(公告)号：JPH0210618A
公开(公告)日：1990-01-16
申请号：JP15914888
申请日：1988-06-29
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , TSUKUSHI MASANORI , OZAWA HIROSHI
IPC分类号： H01H33/915
摘要： PURPOSE:To obtain the stable performance ranging from a large current to a small current and reduce the operating force by providing a buffer chamber in a movable contact piece and suppressing the inflow of the high-temperature gas heated by the arc heat at the time of large current cutoff into the buffer chamber. CONSTITUTION:When a lever 14 is operated by an operating device outside a container 1 to the right rotation direction centering a rotary shaft 16, a movable contact piece 11 is driven to the right direction. The gas in a buffer chamber 12 is compressed, an arc is generated between contact pieces 7 and 11. The high-temperature gas heated by the arc heat of an arc-extinguishing chamber 12 is sprayed at the time of large-current cutoff, the gas is sprayed through a spray hole 17a at the time of small-current cutoff to extinguish the arc. A simple breaking section can be constituted with a small structure by utilizing the interior of the movable contact piece 11 as a buffer. The stable performance ranging from a large current to a small current is obtained, the operating force can be reduced.

54. 发明专利

JPH01243328A BUFFER-TYPE GAS-BLASTED CIRCUIT BREAKER 失效
公开(公告)号：JPH01243328A
公开(公告)日：1989-09-28
申请号：JP6985588
申请日：1988-03-25
申请人： HITACHI LTD
发明人： KASHIMURA KATSUICHI , SATO MINORU , KOYANAGI OSAMU , KUROSAWA YUKIO
IPC分类号： H01H33/70 , H01H33/91 , H01H33/915
摘要： PURPOSE:To prevent deterioration of a withstand voltage caused by decrease in gas density at the fore end of a fixed contact due to rapid gas flow by supplying high pressure gas to a chamber between first and second throat portions through a gas flowing-in portion when the second throat portion is broken by means of a large diameter portion. CONSTITUTION:Upon starting braking operation, movement of a small diameter portion 11a by means of a first throat portion 4a supplies high pressure gas passing through a gas flowing-in portion B as shown by an arrow 25. Substantial shutout of a large diameter portion 11c by means of a second throat portion 4b eliminates an exhaust area therebetween so as not to hardly form virtual gas flow. This can prevent any decrease in density at the fore end of a fixed contact 11 while maintaining the density in a preferable state. Therefore, even in such a case of breaking a small leading current that an arc between contacts 2 and 11 are lost while a high recovery voltage is applied therebetween, the gas density at the fore end of the contact 11 increases, thereby enhancing a withstand voltage.

55. 发明专利

JPH01197929A GAS-BLASTED CIRCUIT BREAKER 失效
公开(公告)号：JPH01197929A
公开(公告)日：1989-08-09
申请号：JP1969188
申请日：1988-02-01
申请人： HITACHI LTD
发明人： TSUKUSHI MASANORI , HASHIMOTO TAKESHI , KOYANAGI OSAMU , SEKI YASUHARU
IPC分类号： H01H33/98
摘要： PURPOSE:To improve the large-current cutoff performance and stabilize the small-current cutoff performance with a small operating force by performing an absorbing action at the later stage of the cutoff operation and providing an insulating nozzle controlling the suction gas flow between a fixed contact piece and a movable contact piece. CONSTITUTION:A suction chamber 5 is constituted of a suction piston 15, a suction cylinder 16 and an insulating nozzle 14, the gas suction port of the insulating nozzle 14 is closed by a movable contact piece 6 while a gas breaker is closed, and it is opened when the movable contact piece 6 passes the insulating nozzle 14 during the cutoff operation. The arc heat at the time of large- current cutoff can be effectively utilized, an arc is absorbed into the insulating nozzle at the time of suction operation, the arc can be surely ignited in the gas flow, the stable cutoff performance for a large current and a small current can be obtained.

56. 发明专利

JPS6459731A BUFFER TYPE GAS BREAKER 失效
公开(公告)号：JPS6459731A
公开(公告)日：1989-03-07
申请号：JP21539587
申请日：1987-08-31
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , SATO MINORU , KASHIMURA KATSUICHI , KUROSAWA YUKIO
IPC分类号： H01H33/91 , H01H33/70
摘要： PURPOSE:To constitute a buffer cylinder without any adverse effect upon breaking, power supply and mechanical performances and make a breaker compact by providing the end plate part of the buffer cylinder with a large diameter part larger than cylinder outer diameter, separating the end plate part from the cylinder part and securing the separated part with bolts. CONSTITUTION:A large diameter part larger than a cylinder part 1b is formed on the external surface of an end plate part 1a, and this large diameter part separates the end plate part 1a from the cylinder part 1b. The separated part is fixed with a set bolt 11 for a movable main contactor 9 and another set bolt 12 for the end plate part 1a and the cylinder part 1b. By providing the large diameter part at the external surface of the end plate part 1a for said separation, the electrically live area of the separated part can be maintained and the area of an air intake part 6 can be kept as conventional, thereby giving no adverse effect to breaking performance. Also, the separated part can be properly fastened with the bolts 11 and 12, and therefore the screwed part thereof is free from a mechanical shock at the time of turning on a breaker, thereby enhancing the mechanical reliability of the breaker.

57. 发明专利

JPS63105421A BUFFER TYPE GAS BREAKER 失效
公开(公告)号：JPS63105421A
公开(公告)日：1988-05-10
申请号：JP24969486
申请日：1986-10-22
申请人： HITACHI LTD
发明人： KASHIMURA KATSUICHI , SATO MINORU , KOYANAGI OSAMU , HIRASAWA KUNIO , ENDO FUMIMASA
IPC分类号： H01H33/70

58. 发明专利

JPS61284014A THREE-PHASE PACKAGE OPERATION TYPE GAS INSULATION EQUIPMENT 失效
公开(公告)号：JPS61284014A
公开(公告)日：1986-12-15
申请号：JP12477785
申请日：1985-06-07
申请人： HITACHI LTD
发明人： KOYANAGI OSAMU , SATO MINORU , KASHIMURA KATSUICHI
IPC分类号： H01H33/42

59. 发明专利

JPS61253732A BUFFER TYPE GAS BREAKER 失效
公开(公告)号：JPS61253732A
公开(公告)日：1986-11-11
申请号：JP9369185
申请日：1985-05-02
申请人： HITACHI LTD
发明人： KASHIMURA KATSUICHI , SATO MINORU , KOYANAGI OSAMU , TSUKUSHI MASANORI
IPC分类号： H01H33/91

60. 发明专利

JPS61109229A 3-phase package gas breaker 失效
标题翻译： 3相封装气体断路器
公开(公告)号：JPS61109229A
公开(公告)日：1986-05-27
申请号：JP23018184
申请日：1984-11-02
申请人： Hitachi Ltd
发明人： SATO MINORU , KASHIMURA KATSUICHI , KOYANAGI OSAMU
IPC分类号： H01H33/56

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