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1. 发明专利

JPH07189609A CONTROL METHOD FOR MOISTURE CONTENT SEPARATION HEATER 失效
公开(公告)号：JPH07189609A
公开(公告)日：1995-07-28
申请号：JP33492993
申请日：1993-12-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： IGARASHI KINGO , AKITA AKIRA , KANEDA HIDEAKI , NISHINOMIYA TAKUJI
IPC分类号： F01K7/24
摘要： PURPOSE:To realize an operation method for a moisture content separation heater in which occurrence of turbine vibration is prevented so that non reheated operation for the moisture content separation heater is carried out when the malfunction of the moisture content separation heater or plant occurrs, and the plant operation is continued without causing any trouble to the moisture content separation heater and a steam turbine in the steam turbine having the moisture content separation heater. CONSTITUTION:A moisture content separation heater to prevent occurrence of turbine vibration is non reheatedly operated by outputting a non-reheat operation start command for the moisture content separation heater, and gradually lowering heating steam of the moisture content separation heater by means of a by-pass valve 12 of a heating steam control valve 11, the heating steam control valve 11 or a heating steam stop valve 10 in a controller 16. By such a process, the occurrence of steam turbine vibration is prevented so that the moisture content separation heater can be nonreheatedly operated.

2. 发明专利

JPH08326506A HEATING STEAM PRESSURE CONTROL METHOD FOR REHEAT STEAM TURBINE AND REHEAT STEAM TURBINE PLANT 失效
公开(公告)号：JPH08326506A
公开(公告)日：1996-12-10
申请号：JP13162295
申请日：1995-05-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUROSAWA ATSUHIRO , NISHINOMIYA TAKUJI , HIRONO MASAMITSU , IGARASHI KINGO
IPC分类号： F01D17/24 , F01K7/24 , F01K13/02
摘要： PURPOSE: To shorten the start time of a turbine by obtaining the value of thermal stress generated to a low pressure turbine from the low pressure turbine inlet part metal temperature, and controlling a heating steam pressure control valve so that this value does not exceed the specified value to the specific life. CONSTITUTION: The low pressure turbine inlet part metal temperature 13 is detected and taken into a thermal stress computing element 26. The specific life consumption of a low pressure turbine 5 is computed from thermal stress generated to the low pressure turbine 5, and the thermal stress value is determined from a life cycle. This value is compared with the thermal stress limit value of a thermal stress limiter 28 by a thermal stress comparator 27. The compared result is sent as a thermal stress ratio to a thermal stress ratio - heating steam pressure change rate setter 25, and the optimum heating steam pressure change rate is determined according to the operating state of the turbine. Turbine load from a load detector 21 is sent as the heating steam set pressure to a heating steam pressure setter 23. The heating steam pressure, a change rate setting signal and the signal of an actual heating steam pressure detector 14 are compared by a heating steam pressure comparing part 19 to compute the deviation, and a heating steam pressure control valve 8 is controlled in response to this signal.

3. 发明专利

JPH08144713A OPERATING METHOD FOR STEAM TURBINE 失效
公开(公告)号：JPH08144713A
公开(公告)日：1996-06-04
申请号：JP28194094
申请日：1994-11-16
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： IGARASHI KINGO , IKEDA HIROSHI , KANEDA HIDEAKI , NISHINOMIYA TAKUJI
IPC分类号： F01K7/22 , F01K7/38
摘要： PURPOSE: To provide an operating method for a steam turbine by which the vibration of a low pressure turbine can be sufficiently suppressed. CONSTITUTION: In case that the outlet steam temperature of a moisture content separating heater 5 rises over a specified value or the exhaust pressure of a high pressure turbine 4 is decreased below the specified value when a steam turbine operation is topped, the heating of the exhaust steam of the high pressure turbine 4 by the moisture content heater 5 is gradually decreased so as to reduce the steam temperature changing rate of a low pressure turbine 6.

4. 发明专利

JPH01307898A MONITOR DEVICE 失效
公开(公告)号：JPH01307898A
公开(公告)日：1989-12-12
申请号：JP13755088
申请日：1988-06-06
申请人： HITACHI LTD
发明人： IGARASHI KINGO , NIKAWARA SEIITSU , ABE MICHIO
IPC分类号： G06T1/00 , G08B13/18
摘要： PURPOSE:To automatically find abnormality in an early stage and find and trace a trespasser to facilitate monitor by projecting a change part without operator's instruction at the time of the occurrence of the change of a picture and tracing and zooming up the change part. CONSTITUTION:When a controller 4 detects the change of the picture and outputs this detection to a monitor device 5 and the device 5 recognizes the change of the picture, a signal 7 is transmitted to the controller 4 to control an electric universal head 3 by the signal 7. Consequently, the universal head 3 and a television camera (ITV) 2 are controlled, and the changed picture is projected on an ITV monitor 1 by a picture signal 8. When the size of the changed picture projected on the ITV monitor 1 is smaller than a preliminarily set size at the time of recognizing the picture change by the device 5, such command is issued to the controller 4 that the changed picture is expanded to the prelimiarily set size by a zoom-up lens 9. The controller 4 issues a signal 11 to control the lens 9 and the changed picture is projected on the monitor 1, thereby discriminating contents of the changed picture by the expanded picture.

5. 发明专利

JPH02143001A MINIMUM FLOW VALVE CONTROLLER OF FEED WATER PUMP 失效
公开(公告)号：JPH02143001A
公开(公告)日：1990-06-01
申请号：JP29455888
申请日：1988-11-24
申请人： HITACHI LTD
发明人： IGARASHI KINGO
IPC分类号： G21D3/08 , F17D1/14 , F22D5/34
摘要： PURPOSE:To prevent disturbances by simultaneous opening and closing by controlling to prevent the simultaneous opening and closing of a plurality of minimum flow valves in the title device of a power generation plant. CONSTITUTION:Opening indicators 9a, 9b of minimum flow valves 7a, 7b, a feed water flow meter 11 and the operation condition of feed water pumps 6a, 6b are input in a control portion 10 to output opening regulation signals of the minimum flow valves 7a, 7b. At this time, the detected flow of the feed water flow meter 11 is equal to or more than the regulation value and the feed water pump 6a is prior when the minimum flow valves 7a, 7b are fully opened together, and the minimum flow valve 7a is closed previous to the minimum flow valve 7a. After the opening of the minimum flow valve 7a becomes 0%, the minimum flow valve 7b of the feed water pump 6b is closed. In the case of valve opening, the minimum flow valve 7b is opened previous to the minimum flow valve 7a. As a result, the disturbances by simultaneous opening and closing are prevented and the pumps can be protected.

6. 发明专利

JP2012122626A Control apparatus of water supply pump 有权
标题翻译：供水泵控制装置
公开(公告)号：JP2012122626A
公开(公告)日：2012-06-28
申请号：JP2010271324
申请日：2010-12-06
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IGARASHI KINGO
IPC分类号： F22D5/32
CPC分类号： F22D11/02 , F01K7/22 , F22B1/023
摘要： PROBLEM TO BE SOLVED: To provide a control apparatus of a water supply pump that makes a reducing amount of a water supply flow rate to a steam generator small during a steam condensate pump trip to inhibit a water level of the steam generator from reducing and prevents the steam condensate pump continuing an operation from continuing a runout operation.SOLUTION: The control apparatus of the water supply pump includes: the plurality of steam condensate pumps installed in parallel to increase a pressure of steam condensate from a condenser; and the plurality of water supply pumps installed in parallel to further increase the steam condensate whose pressure has been increased by the steam condensate pump to supply the steam condensate to the steam generator. The control apparatus outputs a frequency control instruction to a variable frequency power supply device. The control apparatus also includes: a tripping controller that changes the maximum flow-rate limit value, only in the transition duration, with respect to the frequency control instruction to the variable frequency power supply to a runout flow rate in which a short time operation is admitted when the trip of the steam condensate pump during the operation is detected; and a restoration controller that changes the maximum flow-rate limit value from the runout flow rate to a normal flow rate when a stand-by machine of the steam condensate pump is detected to start.
摘要翻译：要解决的问题：提供一种供水泵的控制装置，其在蒸汽冷凝泵跳闸期间使蒸汽发生器的供水流量减少到较小，从而抑制蒸汽发生器的水位减少并防止蒸汽冷凝水泵继续运行以继续跳动操作。供水泵的控制装置包括：并联安装的多个蒸汽冷凝泵，以增加来自冷凝器的蒸汽冷凝物的压力; 并且多个供水泵并联安装，以进一步增加蒸汽冷凝物的蒸汽冷凝物，其蒸汽冷凝泵已经增加了压力，从而将蒸汽冷凝物供给蒸汽发生器。控制装置向变频电源装置输出频率控制指令。控制装置还包括：跳闸控制器，其将相对于对可变频率电源的频率控制指令的转换持续时间的最大流量限制值改变为其中短时间操作为检测到运行期间蒸汽冷凝水泵的行程时承认; 以及恢复控制器，当检测到蒸汽冷凝水泵的待机机启动时，将最大流量限制值从跳动流量改变为正常流量。版权所有（C）2012，JPO＆INPIT

7. 发明专利

JP2002147204A MONITORING DEVICE FOR FEED WATER PUMP DRIVING TURBINE 失效
公开(公告)号：JP2002147204A
公开(公告)日：2002-05-22
申请号：JP2000346520
申请日：2000-11-14
申请人： HITACHI LTD
发明人： IGARASHI KINGO
IPC分类号： F01D17/24 , F22B35/00 , F22D5/32
摘要： PROBLEM TO BE SOLVED: To monitor the operation of both of the whole mechanical system mechanism of an electrical hydraulic control device and a mechanical hydraulic control device, and enhance reliability in plant operation in steam turbine facilities. SOLUTION: A monitoring device 58 detecting the numbers of revolutions 36a, 36b of two feed water pump driving turbines 9a, 9b and monitoring the deviation 56 of the numbers of revolutions is installed, and when the large deviation 61 of the number of revolutions is generated, the control mechanism of the feed water pump driving turbine is judged as abnormal based on such a condition that a controller (changeover) for the instruction of the number of revolutions to the feed water pump driving turbines 9a, 9b within the feed water control device is automatic 11c, and minimum flow valves 16a, 16b of a turbine driving feed water pump is fully closed, as an auxiliary condition, and water level abnormality of a steam generator is notified by an alarm, after the feed water pump driving turbine on the high side of the number of revolutions is stopped when the water level is high 11e, and after the feed water driving turbine on the low side of the number of revolutions is stopped when the water level is low 11d, as the auxiliary condition.

8. 发明专利

JPH05196208A CONTROL OF MOISTURE SEPARATION HEATER 失效
公开(公告)号：JPH05196208A
公开(公告)日：1993-08-06
申请号：JP818492
申请日：1992-01-21
申请人： HITACHI LTD
发明人： IGARASHI KINGO
IPC分类号： F22B37/42 , F22G3/00 , F22G5/00
摘要： PURPOSE:To interrupt heating without damaging a moisture separation heater at irregulanty of the moisture separation heater of a steam turbine of a thermal or atomic power generation plant or at the time of abnormality in the plant. CONSTITUTION:In the case where an alarm 28 is issued owing to abnromality 27 of a moisture separation heater, a manual interruption 20 signal is turned on, or in the case where a plant state signal 17 is turned on, a memory circuit 25 is set and a heating interruption signal 29 is turned on into a non-reheating operation. Thus, the non-reheating operation without damaging the moisture separation heater is enabled.

9. 发明专利

JPS63223308A TURBINE WARMING CONTROLLER 失效
公开(公告)号：JPS63223308A
公开(公告)日：1988-09-16
申请号：JP5404187
申请日：1987-03-11
申请人： HITACHI LTD
发明人： IGARASHI KINGO
IPC分类号： F01D25/10
摘要： PURPOSE:To automate the warming of a high pressure turbine so as to reduce the burden on an operator by constituting the warming valve of a main steam stopping valve in such a way as to be controlled in accordance with the rates of change in a pressure and an inner wall temperature on the first step rear portion of the high pressure turbine. CONSTITUTION:To a controller 5, there are respectively inputted a pre-warming starting command 1 which is the casing warming of a high pressure turbine, a pressure 2 on the first step rear portion of the high pressure turbine, an inner wall temperature 3 on the first step rear portion, an outer wall temperature 4 on the first step rear portion, a rotational speed 62 of the turbine and a drain level 63. The warming valve 6 of a main steam stopping valve is thus controlled with the aid of the controller 5. Thereat, the pressure 2 on the first step rear portion is increased at a fixed rate, and the increasing rate of the inner wall temperature 3 on the first step rear portion is fixed when it comes within the specified value, in addition, a pressure is controlled to become a fixed value when it reaches the pressure required for the warming. In the meantime, a drain valve is opened, and the warming valve 6 is controlled to be constant except when the drain valve is fully closed.

10. 发明专利

JPS63105206A TURBINE WARMING CONTROL METHOD 失效
公开(公告)号：JPS63105206A
公开(公告)日：1988-05-10
申请号：JP24969786
申请日：1986-10-22
申请人： HITACHI LTD
发明人： IGARASHI KINGO , SUZUKI YONEMASA
IPC分类号： F01D25/10
摘要： PURPOSE:To automate the warming of a high pressure turbine wheel chamber and steam regulating valves by controlling warming valves at main steam stop valves on the basis of the 1st stage rear pressure and inner wall temperature rising rate of a high pressure turbine. CONSTITUTION:Warming valves 11-13, 45 are provided at main steam stop valves 6, 7, 9, 10 on the upper stream side of steam regulating valves 14-17. And, the 1st stage rear pressure sensor 2, the 1st stage rear inner wall temperature sensor 3 and the 1st stage rear outer wall temperature sensor 4 are provided at a high pressure turbine 61. At the starting time of warming, the 1st stage rear pressure of the high pressure turbine is made to rise at a fixed ratio, and when the rising rate of the 1st stage rear inner wall temperature becomes within a specified value, the change rate of the inner wall temperature is fixedly controlled, and when the 1st stage rear pressure rises to the pressure equivalent to warming completion, pressure is fixedly controlled.

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