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11. 发明专利

JPS6185506A Warming up method of steam turbine 失效
标题翻译：蒸汽涡轮加热方法
公开(公告)号：JPS6185506A
公开(公告)日：1986-05-01
申请号：JP20706284
申请日：1984-10-04
申请人： Hitachi Eng Co Ltd , Hitachi Ltd
发明人： NISHINOMIYA TAKUJI , IKEDA HIROSHI , KANEDA HIDEAKI , MAEDA TAKAYOSHI , KUWAJIMA HIDESUMI
IPC分类号： F01D25/10
CPC分类号： F01D25/10
摘要： PURPOSE:To warm up a steam turbine speedily with a simple structure, by opening a warm up valve of a partial stop valve out of plural warm-up valved main steam stpp valves, while opening another stop valve too, and warming up a main steam leed pipe and a steam chest of a main steam control valve. CONSTITUTION:Warm-up valves 2a-1 and 2a-2 are installed in each of plural main steam stop valves 2-1 and 2-2 and drain valves 7-1 and 72 are installed in addition. In time of warming up for a turbine, the warm-up valve 2a-2 of the one side main steam control valve 2-2 is opened, while the drain valve 7-1 of the other side main steam control valve 2-1 is also opened. With this constitution, the steam run past the warm-up valve 2a-2 is discharged out of the drain valve 7-1 by way of main steam lead pipes 3-3 and 3-4 and steam chests 4-1 and 4-2 of a main steam control valve, whereby these main steam lead pipes 3-1-3-4 and steam chests 4-1 and 4-2 are speedily warmed up.
摘要翻译：目的：通过简单的结构快速预热蒸汽轮机，通过从多个预热阀主蒸汽阀门中打开一个部分止回阀的预热阀，同时打开另一个截止阀，并加热主蒸汽主管和主蒸汽控制阀的蒸汽箱。构成：在多个主蒸汽截止阀2-1和2-2中的每一个中安装有预热阀2a-1和2a-2，另外安装排水阀7-1和72。在涡轮机预热时，单侧主蒸汽控制阀2-2的预热阀2a-2打开，而另一侧主蒸汽控制阀2-1的排水阀7-1为也开了。利用这种结构，经过预热阀2a-2的蒸汽通过主蒸汽引管3-3和3-4以及蒸汽箱4-1和4-2从排水阀7-1排出的主蒸汽控制阀，由此这些主蒸汽导管3-1-3-4和蒸汽箱4-1和4-2被快速升温。

12. 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.

13. 发明专利

JPH0337304A START OF STEAM TURBINE GENERATION PLANT PROVIDED WITH TURBINE BYPASS DEVICE 失效
公开(公告)号：JPH0337304A
公开(公告)日：1991-02-18
申请号：JP17353089
申请日：1989-07-05
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TAKEDA TAIJI , KANEDA HIDEAKI , OGINO SATORU , IKEMATSU TAKEHIKO , TERANISHI NORIYOSHI , HOIZUMI SHINICHI
IPC分类号： F01D19/00 , F01K7/24
摘要： PURPOSE:To improve the starting property of a steam turbine generation plant by introducing steam into a high pressure turbine after introducing steam into a medium pressure turbine in starting the plant to change the opening and closing speed of a steam spill valve or intercept valve with a physical amount corresponding to the running condition of a high pressure turbine bypass device. CONSTITUTION:In starting a steam turbine plant, steam from a steam generator 1 is passed through a main steam pipe 2, high pressure bypass pipe 21 and low temperature reheating pipe 6 to be heated again by the steam generator 1 and then sent through a high temperature reheating pipe 7 and intercept valve 8 to a medium pressure turbine 9 and low pressure turbine 10. If the further load is increased after sending the steam into both turbines, a steam spill valve 3 is opened to introduce steam into a high pressure turbine 4. The steam spill valve 3 and intercept valve 8 are controlled by a valve opening controller X according to a turbine load signal Q, while, when the opening B of a high pressure bypass valve is a specified one or less, a controlling signal for stopping the abrupt opening of the steam spill valve 3 is constitutionally inputted to the valve opening controller X.

14. 发明专利

JPH1018808A HEATING STEAM CONTROL DEVICE FOR REHEATING STEAM TURBINE 失效
公开(公告)号：JPH1018808A
公开(公告)日：1998-01-20
申请号：JP19277796
申请日：1996-07-03
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUROSAWA ATSUHIRO , NISHINOMIYA TAKUJI , HIRONO MASAMITSU , WADA NORIHISA , SHIMOMURA NAOHITO , KANEDA HIDEAKI
IPC分类号： F01K7/24
摘要： PROBLEM TO BE SOLVED: To suppress thermal stress in a second stage reheater main body, its thermal transmission pipe and a low pressure turbine at the time of service-in of the second stage reheater in a reheating steam turbine. SOLUTION: This device is provided with a heating steam pressure regulating valve 9, a reheater operation data receiving part 22 and a saturation pressure-temperature function curve 23. The heating steam pressure (flow rate) regulating valve 9 is arranged for adjusting extracted steam (main steam) of a high pressure turbine flowed into a second stage reheater 5. An outlet heated steam temperature 17 of a first stage reheater 4 is input to the reheater operation data receiving part 22. Saturation pressure of the heating steam temperature in the second stage reheater 5 is calculated based on the saturation pressure-temperature function curve 23. A second stage reheater heating steam pressure setting function generator 20 is arranged for setting a lower limit set pressure at the time of service-in of the second stage reheater 5 by adding required excessive pressure for heating to the calculated saturation pressure. A heating steam control means 10 is arranged for controlling the regulating valve 9. The heating steam set pressure of the second stage reheater 5 is set equally to the saturation pressure of the outlet heated steam temperature of the first stage reheater 4 based on the outlet heated steam temperature of the first stage reheater which is previously sensed at the time of service-in of the second stage reheater 5.

15. 发明专利

JPH02308904A STEAM TURBINE DEVICE, ITS CONTROL METHOD AND CONTROL DEVICE 失效
公开(公告)号：JPH02308904A
公开(公告)日：1990-12-21
申请号：JP12877689
申请日：1989-05-24
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： YOSHIHARA NORIO , NAGAI SHINICHI , KANEDA HIDEAKI
IPC分类号： F01D17/20 , F01D19/00 , F01D21/14 , F01D21/16 , F01K7/24 , F01K13/02
摘要： PURPOSE:To avoid a turbine accident in advance by tripping a steam turbine when there occurs unbalance in the steam amount supplied to a plural number of steam turbines. CONSTITUTION:When it is detected during the ordinary drive of a turbine that there is a malfunction in controlling turbine control systems 29 and 30, a control part 40 first gives a quick close instruction to turbine by-pass valves 14 and 15. Then the unbalance amount of the supplied steam amount to turbines 1 - 3 after the quick close instruction is given is detected, and in the case when the valve 11 and a reheat steam stop valve 16 are closed and this steam turbine device is tripped. Consequently, even when the by-pass valves do not close in spite of the above, it is possible to avoid damages to the turbine.

16. 发明专利

JPS6456903A LOW PRESSURE TURBINE BYPASS CONTROLLER 失效
公开(公告)号：JPS6456903A
公开(公告)日：1989-03-03
申请号：JP21278887
申请日：1987-08-28
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OGINO SATORU , KANEDA HIDEAKI
IPC分类号： F01D19/00
摘要： PURPOSE:To prevent an increase in a high pressure exhaust temperature by providing a circuit which changes a pressure set value for controlling a low pressure turbine bypass to a specified pressure at changeover between an intercept bypass valve and a main steam control valve, in the control system of a low pressure turbine bypass valve. CONSTITUTION:The output of a detector 12 for steam pressure behind high pressure first stage is converted into a reheat steam pressure by means of a function generator 13 in a control device which controls a low pressure turbine bypass control valve 9 for directly introducing steam to a condenser while bypassing a middle pressure turbine. The reheat steam pressure is compared with a specified pressure from a signal generator 11 by a comparator 14, and the higher of which is used as a set value. The set value is then compared with a signal from a reheat steam pressure detector 15 by a comparator 16 to find a deviation, according to which the valve 9 is controlled. When a detector 21 detects that the changeover between an intercept bypass valve and a steam adjusting valve is completed, a signal generator 19 is selected by a changeover switch 20 and the pressure set value is switched with a specified changing rate by a function generator 22.

17. 发明专利

JPS63100203A STEAM FLOW CONTROL METHOD FOR STEAM TURBINE 失效
公开(公告)号：JPS63100203A
公开(公告)日：1988-05-02
申请号：JP24528686
申请日：1986-10-17
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NISHINOMIYA TAKUJI , KANEDA HIDEAKI
IPC分类号： F01D17/20 , F01K7/38
摘要： PURPOSE:To prevent a compartment from being heated by a windage in the main steam low flow range by bringing the extraction pressure set value forcibly down to the lowest limit, based on an opening degree signal or the like of a main steam control valve, to fully open an extraction steam control valve. CONSTITUTION:Steam is extracted after its flow is adjusted by a main steam control valve 4 and then introduced to a high pressure turbine 1. The extraction steam is controlled by an extraction steam control valve 5 so that the actual pressure detected by a pressure detector 7 can be the set value. At this time, during a normal operation, since the main steam pressure is higher than the extraction set pressure, the extraction steam control valve 5 is opened to introduce the high pressure turbine exhaust steam to a low pressure turbine 2. An opening degree detector 8 detects, in this structure, that the main steam control valve 4 is put into a slightly opened condition while the extraction pressure is under control and a low load operating condition appers. At the time of detecting this operation condition, such steps as to bring the extraction pressure set value forcibly down to the lowest limit or the like are taken.

18. 发明专利

JPH10299910A STEAM GOVERNING VALVE 失效
公开(公告)号：JPH10299910A
公开(公告)日：1998-11-13
申请号：JP10325797
申请日：1997-04-21
申请人： HITACHI LTD
发明人： YAMANAKA KAZUNORI , KANEDA HIDEAKI , YOKOTA OSAMU , KATO FUMIO
IPC分类号： F16K1/36 , F16K1/42 , F16K1/52 , F16K47/02
摘要： PROBLEM TO BE SOLVED: To smooth flow downstream of a valve element so as to prevent noise caused by the collision of jet and noise caused by the generation of a turbulent vortex by providing the bottom face part of the valve element with a flat face, and providing a circumferential groove of approximately angle shape or semicircular cross section near the outer periphery of the flat face. SOLUTION: A bottom face part of a valve element 1 of a steam governing valve is provided with a flat face 7, and a circumferential groove 9 is provided near the outer periphery of the flat face 7. In the bottom face part of the valve element 1, the radius of curvature R1 of the valve element 1 and the radius of curvature R2 of a valve seat 4 are set to be R1=R2, and the flat face 7 is formed in such a position that the distance h1 from a contact point between the valve element 1 and valve seat 4 is 0.05

19. 发明专利

JPH10299909A STEAM GOVERNING VALVE 失效
公开(公告)号：JPH10299909A
公开(公告)日：1998-11-13
申请号：JP10908697
申请日：1997-04-25
申请人： HITACHI LTD
发明人： YOKOTA OSAMU , KATO FUMIO , YAMAZAKI HARUYUKI , TSUBOI NOBUYOSHI , SENOO SHIGEKI , KANEDA HIDEAKI , YAMANAKA KAZUNORI , MUROBOSHI TAKANORI
IPC分类号： F16K1/36 , F16K1/42 , F16K47/02
摘要： PROBLEM TO BE SOLVED: To prevent the damage of a valve element and breaking of a valve stem by forming the tip part of the valve element in a flat face on the downstream of a contact point coming in contact with a valve seat, and specifying the distance between the contact point and the flat face part of the valve element in a steam governing valve formed in such a way that the spherical part of the valve element tip part is brought into contact with the valve seat. SOLUTION: The tip part of a valve element 5 of a steam governing valve is formed in a flat face on the downstream of a contact point in contact with a valve seat 6, but in this case, the distance (h) between the contact point and the flat face part of the valve element 5 is set to be not more than 1/10 of a diameter of a contact part between the valve element 5 and the valve seat 6. That is, when the distance between the contact point and the flat face part of the valve body 5 is (h) and the diameter of the contact part between the valve element 5 and valve seat 6 is Do, it is so formed as to be h

20. 发明专利

JPS62189304A METHOD FOR CONTROLLING COMBINED PLANT 失效
公开(公告)号：JPS62189304A
公开(公告)日：1987-08-19
申请号：JP2896286
申请日：1986-02-14
申请人： HITACHI LTD
发明人： KANEDA HIDEAKI
IPC分类号： F01D13/00 , F01D21/00 , F01D21/14 , F01K23/10
摘要： PURPOSE:To continue the FCB operation of a steam turbine with its thorough protection by reopening a control valve while watching various steam conditions and the conditions of a steam turbine main body at the time of its load shutdown or the FCB operation. CONSTITUTION:A high pressure steam governing valve HPCV and a low pressure steam governing valve LPCV are totally closed by a FCB signal. The LPCV is slightly opened to a cooling opening after it is checked for (B) time, generated LP steam quantity, and steam conditions when the FCB signal has ceased. When the conditions of a starting command, a mismatch, and high pressure steam have been secured for the steam turbine during its cooling operation, the HPCV is fully opened. Thus, a steam turbine can continue its FCB operation under thorough protection.

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