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51. 发明专利

JPH04113081A PUMP WATER SEALING DEVICE 失效
公开(公告)号：JPH04113081A
公开(公告)日：1992-04-14
申请号：JP22676590
申请日：1990-08-30
申请人： HITACHI LTD
发明人： MASUDA TOYOHIKO , UENO TAKESHI , ASADA YUKIHIRO , FUJITA KENICHI
IPC分类号： F04D29/10 , F16J15/16 , F16J15/40
摘要： PURPOSE:To prevent the generation of a flush and recover a drain fluid without changing the floor form of a building by mourning a contact type shaft seal member provided in a position closer to the outside from a second shaft seal member in a seal box. CONSTITUTION:In the inner part of a seal box 2, a third shaft seal member 7 of contact type is mounted along first and second shaft seal members 3, 4. It is mounted in the state situated on the outside of the second shaft seal 4 with a second space part between and seals the inside of the seal box 2 from the outside, whereby the seal box 2 is made into a space chamber having a pressure higher than the atmospheric pressure. Thus, even if the internal fluid in the pump is leaked to the seal box, the fluid is prevented from causing a flush, the generation of a water hammer is prevented, and the pressure of the fluid passing through the seal box is never reduced lower than the atmospheric pressure. Further, as the drain fluid can be guided to a desired upper position, the drain fluid can be recovered without changing the floor form of a building.

52. 发明专利

JPH0336123B2 失效
公开(公告)号：JPH0336123B2
公开(公告)日：1991-05-30
申请号：JP13728884
申请日：1984-07-04
申请人： HITACHI LTD
发明人： HASHIMOTO TSUGIO , ARAKAWA TADAO , UENO TAKESHI , INUI TAIJI , KURIBAYASHI TETSUZO , URUSHA HARUO
IPC分类号： F01D19/00 , F01D19/02 , F01D25/12 , F01K7/24 , F01K13/02

53. 发明专利

JPH01179805A RECIRCULATION DEVICE FOR SUPPLY WATER PUMP 失效
公开(公告)号：JPH01179805A
公开(公告)日：1989-07-17
申请号：JP38188
申请日：1988-01-06
申请人： HITACHI LTD
发明人： UENO TAKESHI , YOSHINARI YUKIMASA
IPC分类号： F22D5/34
摘要： PURPOSE:To make most appropriate the plant operation control by providing, besides a first overheat prevention line which goes to a condenser independently from the outlet of each supply water pump, a second minimum flow rate recirculation line which returns to a suction main pipe from a discharge main pipe of a supply water pump and combining recirculation control valves for both of those lines. CONSTITUTION:A system to prevent overheating of a supply water pump 8 branches an overheat prevention piping 10 from the outlet side of each pump, and the piping 10 is connected to a condenser 3 via a first recirculation control valve 11 and anti-flash orifice 12. The heat inputted to the pump is removed by this first overheat prevention line and the control valve 11 makes a rapid opening action so that it does not damage the protection function of the pump. Further, a minimum flow rate recirculation piping 13 branches from the outlet main pipe of the supply water pump 8 and is connected to the suction piping of the supply water pump via a second recirculation control valve 14, and supplements the flow rate required for securing safe operation in the low flow rate range which lacks in the overheat prevention line. The variation in the water level of a steam generator 1 is kept to minimum by mismatching the opening and closing timings of the control valve 14 to those of the control valve 11 or arranging them continuously.

54. 发明专利

JPS6193208A Turbine bypass system 失效
标题翻译：涡轮旁路系统
公开(公告)号：JPS6193208A
公开(公告)日：1986-05-12
申请号：JP21437284
申请日：1984-10-15
申请人： Babcock Hitachi Kk , Hitachi Ltd
发明人： HOIZUMI SHINICHI , ABE MICHIO , UENO TAKESHI , ARAKAWA TADAO , HODOTSUKA KUNIO
IPC分类号： F01K7/22 , F01K7/24 , F01K9/04
CPC分类号： F01K7/24 , F01K7/22 , F01K9/04
摘要： PURPOSE: To improve the profitability and the operability of a steam turbine power plant by disposing a valve which pocesses a flow-rate or a pressure adjusting function in a pipe passage which communicates a reheater and a condenser with each other.
CONSTITUTION: A turbine bypass system consists of a turbine bypass piping 53, a low-pressure turbine bypass piping 63 and a low-pressure turbine bypass piping 75. The turbine bypass system contains pipings 54 and 64 which discharge part of steam from a primary low-temperature steam piping 42 and a secondary low-temperature reheated steam piping 44 to a condenser 30. In operation of the turbine bypass, adjusting valves 58 and 68 are controlled to feed the demanded quantity of steam to the reheaters 12 and 13 of a boiler 10. The profitability and the operability of the turbine power plant can thereby be improved.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过在连通再热器和冷凝器的管道中设置流量或压力调节功能的阀门来提高蒸汽轮机发电厂的盈利能力和可操作性。构成：涡轮机旁通系统由涡轮机旁通管道53，低压涡轮机旁通管道63和低压涡轮机旁通管道75组成。涡轮机旁通系统包括管道54和64，其将部分蒸汽从初级低温度蒸汽管道42和次级低温再热蒸汽管道44连接到冷凝器30.在涡轮机旁路操作中，调节阀58和68被控制以将所需量的蒸汽输送到锅炉的再热器12和13 从而可以提高涡轮发电厂的盈利能力和可操作性。

55. 发明专利

JPS612873B2 JPS612873B2 - 失效
公开(公告)号：JPS612873B2
公开(公告)日：1986-01-28
申请号：JP10551379
申请日：1979-08-21
申请人： Hitachi Ltd
发明人： MASUDA TOYOHIKO , UENO TAKESHI , NAGAI HIROTSUGU , TSUNEMATSU HIROSHI , NAKAMURA SHOZO
IPC分类号： F28B9/08 , B01D5/00 , F22D11/00 , F28B11/00
CPC分类号： B01D5/009 , B01D5/00 , F22D11/006

56. 发明专利

JPS60223904A DEVICE FOR REPLACING HOT WATER OF BOILER FEED PUMP 失效
公开(公告)号：JPS60223904A
公开(公告)日：1985-11-08
申请号：JP7854984
申请日：1984-04-20
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NAKAMURA YASUAKI , KADOKI TERUO , UENO TAKESHI
IPC分类号： F22D11/00 , F22D7/08

57. 发明专利

JPS6017605A CIRCULATOR FOR BOILER FEED PUMP SYSTEM 失效
公开(公告)号：JPS6017605A
公开(公告)日：1985-01-29
申请号：JP12338483
申请日：1983-07-08
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OKADA MIKIO , KURIBAYASHI TETSUZOU , UENO TAKESHI
IPC分类号： F22D11/00 , F22D11/02

58. 发明专利

JPS6017204A TURBINE DEVICE FOR FEED WATER PUMP 失效
公开(公告)号：JPS6017204A
公开(公告)日：1985-01-29
申请号：JP12336083
申请日：1983-07-08
申请人： HITACHI LTD
发明人： KURIBAYASHI TETSUZOU , UENO TAKESHI
IPC分类号： F01D15/08 , F01D17/20
摘要： PURPOSE:To surpress a rise in temperature inside an exhaust chamber, by making the driving steam of a feed water pump turbine select from the air bleed of a main turbine to the main steam and then the auxiliary steam in time of fast cutback operation shifting, in case of a transformation power plant. CONSTITUTION:When a steam turbine 50, driving a feed water pump 35 in a transformation power plant, is shifted to fast cutback operation following the load interruption of a system, the driving steam of the turbine 50 is selected from low pressure steam 52 to main steam 53 and then to auxiliary steam 56. A pressure regulating valve 55 and a pressure regulator 62 both are installed in an auxiliary steam pipe 56 while a low selector 64 is installed in control air piping 63 connecting both 55 and 62. And, with a timer 66, a solenoid valve 67 is operated after the elapse of a certain period of time in an FCB signal, and the pressure regulating valve 55 is gradually opened with a ramp functioner 68, making it perform the pressure control.

59. 发明专利

JPS56100204A SIDE STREAM TYPE CONDENSATION SYSTEM 失效
公开(公告)号：JPS56100204A
公开(公告)日：1981-08-12
申请号：JP261280
申请日：1980-01-16
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： MASUDA TOYOHIKO , UENO TAKESHI , NAGAI HIROTSUGU , ISHIMARU HITOSHI
IPC分类号： F22B37/52 , F01K9/00 , F22B37/48 , F22D11/00

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