JPH0423088B2 - - Google Patents
Info
- Publication number
- JPH0423088B2 JPH0423088B2 JP57195615A JP19561582A JPH0423088B2 JP H0423088 B2 JPH0423088 B2 JP H0423088B2 JP 57195615 A JP57195615 A JP 57195615A JP 19561582 A JP19561582 A JP 19561582A JP H0423088 B2 JPH0423088 B2 JP H0423088B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- steam
- temperature
- turbine bypass
- temperature difference
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000012360 testing method Methods 0.000 claims description 23
- 238000011144 upstream manufacturing Methods 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 8
- 230000008646 thermal stress Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 230000035939 shock Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/04—Plants characterised by condensers arranged or modified to co-operate with the engines with dump valves to by-pass stages
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Turbines (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、蒸気タービンプラントにおけるター
ビンバイパス弁暖機装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a turbine bypass valve warm-up device in a steam turbine plant.
一般に、蒸気タービンプラントにおいては、タ
ービン起動時における蒸気発生器の安定性と過熱
防止を確保するため、蒸気発生器ではタービン起
動時でも必要最低限の蒸気を発生させておき、タ
ービン起動に必要以外の蒸気をバイパスさせて復
水器に回収させ、或はタービンの緊急停止時に蒸
気発生器で発生した蒸気をバイパスさせて復水器
に送給する等のために、タービンバイパス装置を
設けることが行なわれている。
Generally, in a steam turbine plant, in order to ensure the stability of the steam generator and prevent overheating when the turbine is started, the steam generator is made to generate the minimum amount of steam even when the turbine is started. A turbine bypass device may be installed to bypass the steam generated in the steam generator and to recover it in the condenser, or to bypass the steam generated in the steam generator and feed it to the condenser in the event of an emergency shutdown of the turbine. It is being done.
すなわち、第１図は上記タービンバイパス装置
を設けたタービンプラントの系統図であつて、原
子炉の如き蒸気発生器１で発生した蒸気は、主蒸
気隔離弁２、主蒸気止め弁３、および蒸気加減弁
４を経て高圧タービン５に供給される。上記高圧
タービン５に供給されそこで仕事を行なつた蒸気
は、湿分分離器６で湿分を除去された後、インタ
ーセプト弁７を経て低圧タービン８に流入して仕
事を行ない、発電機９を駆動し、その後復水器１
０で凝縮復水せしめられる。そしてこの復水は復
水ポンプ１１によつて抽出され、図示しない給水
加熱器等を経て再び蒸気発生器１に還流される。 That is, FIG. 1 is a system diagram of a turbine plant equipped with the above-mentioned turbine bypass device, in which steam generated in a steam generator 1 such as a nuclear reactor is passed through a main steam isolation valve 2, a main steam stop valve 3, and a steam It is supplied to a high pressure turbine 5 via a regulating valve 4. The steam that is supplied to the high pressure turbine 5 and performs work there has its moisture removed by a moisture separator 6, and then flows into the low pressure turbine 8 via an intercept valve 7 to perform work and power the generator 9. drive, then condenser 1
At 0, the water is condensed. This condensate is then extracted by a condensate pump 11 and returned to the steam generator 1 via a feed water heater (not shown) or the like.
一方、主蒸気止め弁３の上流側には、タービン
バイパス弁１２を有するタービンバイパス導管１
３の一端が接続されており、そのタービンバイパ
ス導管１３の他端が減圧装置１４および減温装置
１５を介して復水器１０に連接されている。 On the other hand, on the upstream side of the main steam stop valve 3, a turbine bypass conduit 1 having a turbine bypass valve 12 is provided.
3 is connected to the turbine bypass conduit 13, and the other end of the turbine bypass conduit 13 is connected to the condenser 10 via a pressure reducing device 14 and a temperature reducing device 15.
しかして、例えば電力系統の事故等によつて負
荷しや断が行なわれると、蒸気加減弁４が閉じら
れるとともに、タービンバイパス弁１２が開らか
れ、蒸気発生器１から送給された蒸気はタービン
をバイパスしタービンバイパス導管１３を経て復
水器１０に流入され、原子炉スクラム等の非常停
止にまで発展することが防止される。 For example, when the load is turned on or off due to an accident in the electric power system, the steam control valve 4 is closed, the turbine bypass valve 12 is opened, and the steam supplied from the steam generator 1 is It bypasses the turbine and flows into the condenser 10 via the turbine bypass conduit 13, thereby preventing the situation from developing into an emergency shutdown such as a reactor scram.
このように、発電機９が負荷しや断したような
場合、蒸気加減弁４を急閉させるとともに、定格
蒸気流量を処理するバイパス弁１２を急開させ、
これによつて蒸気発生器１での発生蒸気をしや断
することなく復水器１０に吸収させるので、蒸気
発生器１の圧力上昇等を回避し、蒸気発生器を停
止させることなく、所内単独運転に移行させるこ
とができる。したがつて、所内単独運転状態で系
統事故の復旧を待ち、復旧後直ちに再併入てター
ビン駆動を開始することができる。 In this way, when the load on the generator 9 is cut off, the steam control valve 4 is suddenly closed, and the bypass valve 12, which handles the rated steam flow rate, is suddenly opened.
As a result, the steam generated in the steam generator 1 is absorbed into the condenser 10 without interruption, thereby avoiding a pressure increase in the steam generator 1, etc., and without stopping the steam generator. It is possible to shift to independent operation. Therefore, it is possible to wait for recovery from the system accident in the standalone operation state in the plant, and immediately rejoin the system and start driving the turbine after recovery.
第２図は上記タービンバイパス装置に使用され
るタービンバイパス弁１２の縦断面図であつて、
弁ケーシング２０は上流側蒸気室２１および下流
側蒸気室２２に区割されており、上記上流側蒸気
室２１が連結管部２１ａを介して主蒸気管側のタ
ービンバイパス導管に接続され、下流側蒸気室２
２は連結管部２２ａを介して復水器側のタービン
バイパス導管に接続されている。
FIG. 2 is a longitudinal cross-sectional view of the turbine bypass valve 12 used in the turbine bypass device, and includes:
The valve casing 20 is divided into an upstream steam chamber 21 and a downstream steam chamber 22, and the upstream steam chamber 21 is connected to a turbine bypass conduit on the main steam pipe side via a connecting pipe section 21a, and steam room 2
2 is connected to a turbine bypass conduit on the condenser side via a connecting pipe section 22a.
また、上記上流側蒸気室２１と下流側蒸気室２
２との連通口部には弁座２３が設けられており、
その弁座２３に、上流側蒸気室２１内に配設され
た弁体２４が着座し、その連通口をしや断し得る
ようにしてある。上記弁体２４に装着された弁杆
２５は、下流側蒸気室２２を貫通し、弁棒ガイド
２６に案内されて軸線方向に摺動可能とされ、弁
ケーシング２０外に設けられた弁駆動装置（図示
せず）に連結されている。なお、図中符号２７は
弁上蓋である。 In addition, the upstream steam chamber 21 and the downstream steam chamber 2
A valve seat 23 is provided at the communication port with the valve 2.
A valve body 24 disposed within the upstream steam chamber 21 is seated on the valve seat 23 so as to be able to close the communication port. A valve rod 25 attached to the valve body 24 passes through the downstream steam chamber 22 and is slidable in the axial direction while being guided by a valve rod guide 26, and is connected to a valve drive device provided outside the valve casing 20. (not shown). In addition, the code|symbol 27 in the figure is a valve upper cover.
ところで、このようなバイパス弁１２において
は、弁が全閉している場合には、上流側蒸気室２
１は高温高圧の蒸気で満たされており、一方下流
側蒸気室２２は復水器１０に連通しているため、
復水器１０の真空度に応じたかなり低温の飽和蒸
気で満たされている。 By the way, in such a bypass valve 12, when the valve is fully closed, the upstream steam chamber 2
1 is filled with high-temperature, high-pressure steam, while the downstream steam chamber 22 is in communication with the condenser 10.
The condenser 10 is filled with saturated steam at a fairly low temperature depending on the degree of vacuum.
したがつて、この場合上流側蒸気室２１の室壁
は高温蒸気と接しているため高い温度レベルとな
り、下流側蒸気室２２の室壁および連結管部２２
ａは、かなり低温の飽和蒸気と接しており、また
保温されているとはいえ周囲はプラント室内空気
温度であること、および高温側蒸気室２１の室壁
からの熱伝導による影響はかなり少なくなつてい
ることから、温度レベルはプラント室内空気温度
より数十度高い程度の状態にある。また、弁座２
３が設けられている連通口部は、上流側蒸気室２
１からの熱伝導の影響によつて上記両者の中間の
温度レベルにある。 Therefore, in this case, the chamber wall of the upstream side steam chamber 21 is in contact with the high temperature steam, so the temperature level is high, and the chamber wall of the downstream side steam chamber 22 and the connecting pipe section 22
A is in contact with fairly low-temperature saturated steam, and although it is kept warm, the ambient temperature is the same as that of the air inside the plant, and the influence of heat conduction from the chamber wall of the high-temperature side steam chamber 21 is considerably reduced. Therefore, the temperature level is several tens of degrees higher than the indoor air temperature of the plant. Also, valve seat 2
3 is provided in the upstream steam chamber 2.
Due to the influence of heat conduction from 1, the temperature level is between the above two.
ところが、このような温度分布による熱応力
は、定常時にはメタル内外面温度差が低いために
かなり低いが、数百ミリ秒でバイパス弁１２の弁
体２４が弁座２３から急速に離れて急開すると、
主蒸気管側からの高温蒸気が短時間のうちに下流
側蒸気室２２に流入し、復水器側に流れていくた
め、瞬時のうちに、連通口部、下流側蒸気室２２
および連通管部２２ａが高温蒸気と接し、熱衝撃
が加えられ、当該部にクラツクが生じる可能性が
ある。 However, although the thermal stress caused by such temperature distribution is quite low in steady state because the temperature difference between the inner and outer surfaces of the metal is low, the valve body 24 of the bypass valve 12 rapidly separates from the valve seat 23 in a few hundred milliseconds and suddenly opens. Then,
Since high-temperature steam from the main steam pipe side flows into the downstream side steam chamber 22 in a short time and flows to the condenser side, the high temperature steam flows from the communication port to the downstream side steam chamber 22 in an instant.
The communication pipe portion 22a may come into contact with high-temperature steam and receive a thermal shock, which may cause cracks in the portion.
さらに、タービンバイパス弁の信頼性を確認す
るために、毎週実施されている開閉テストにおい
ても、弁開時間が数秒と長いとはいえ、前述と同
様に熱応力によつてタービンバイパス弁の強度寿
命が高い割合で消費されてしまう等の問題点があ
る。 Furthermore, in the opening/closing tests that are conducted weekly to confirm the reliability of turbine bypass valves, even though the valve opening time is long (several seconds), as mentioned above, the strength of the turbine bypass valve is affected by thermal stress. There are problems such as a high rate of consumption.
本発明はこのような点に鑑み、バイパス弁開閉
テスト時におけるタービンバイパス弁急開時に弁
ケーシング等に加わる熱衝撃を大幅に緩和し、発
生熱応力による強度寿命の低下を低減させるよう
にしたタービンバイパス弁暖機装置を得ることを
目的とする。
In view of these points, the present invention provides a turbine that significantly alleviates the thermal shock applied to the valve casing etc. when the turbine bypass valve suddenly opens during the bypass valve opening/closing test, and reduces the decrease in strength life due to generated thermal stress. The purpose is to obtain a bypass valve warming device.
本発明は、タービンバイパス弁の上流側蒸気室
の蒸気温度と下流側蒸気室メタル温度との温度差
を検出する温度差検出装置と、タービンバイパス
弁テスト時における上記タービンバイパス弁の開
度変化を上記検出装置からの温度差信号によつて
変更する弁テスト制御装置とを設けたことを特徴
とするものであつて、上流側蒸気室内蒸気温度と
下流側蒸気室メタル温度との温度差に応じてター
ビンバイパス弁急開時における弁ケーシング等の
熱衝撃を緩和するとともに、一方弁テスト時にお
いてもタービンバイパス弁に高い熱応力が加わる
ことを防止するようにしたものである。
The present invention provides a temperature difference detection device that detects the temperature difference between the steam temperature in the upstream steam chamber of a turbine bypass valve and the downstream steam chamber metal temperature, and a temperature difference detection device that detects the temperature difference between the steam temperature in the upstream steam chamber and the downstream steam chamber metal temperature, and The valve test control device is characterized in that it is provided with a valve test control device that changes according to a temperature difference signal from the detection device, and the valve test control device changes the temperature according to the temperature difference between the steam temperature in the upstream steam chamber and the metal temperature in the downstream steam chamber. This is designed to alleviate thermal shock to the valve casing and the like when the turbine bypass valve is suddenly opened, and also to prevent high thermal stress from being applied to the turbine bypass valve during one-way valve tests.
以下、第３図乃至第５図を参照して本発明の一
実施例について説明する。なお、第３図中第２図
と同一部分には同一符号を付し詳細な説明は省略
する。
An embodiment of the present invention will be described below with reference to FIGS. 3 to 5. Note that the same parts in FIG. 3 as in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.
第３図において、弁ケーシング２０には、上流
側蒸気室２１内の蒸気温度を検出する第１の温度
検出器３０および下流側蒸気室２２のメタル温度
を検出する第２の温度検出器３１がそれぞれ設け
られている。上記両温度検出器３０および３１で
検出された温度信号は、それぞれ温度差検出装置
３２に加えられ、そこで互いに比較され温度差信
号が出力される。 In FIG. 3, the valve casing 20 includes a first temperature detector 30 for detecting the steam temperature in the upstream steam chamber 21 and a second temperature detector 31 for detecting the metal temperature in the downstream steam chamber 22. Each is provided. The temperature signals detected by both temperature detectors 30 and 31 are respectively applied to a temperature difference detection device 32, where they are compared with each other and a temperature difference signal is output.
一方、下流側蒸気室２２には、例えば蒸気加減
弁４の弁棒漏えい蒸気管と連結された暖機蒸気供
給管３３が接続開口せしめられており、その暖機
蒸気供給管３３には調節弁３４が設けられてい
る。ところで、上記調節弁３４はバイパス弁暖機
制御装置３５によつてその開度制御が行なわれる
ようにしてあり、そのバイパス弁暖機制御装置３
５には、前記温度差検出装置３２からの温度差信
号が加えられ、その温度差信号に対応して調節弁
制御信号が前記調節弁３４に加えられる。 On the other hand, the downstream side steam chamber 22 has a connection opening for a warm-up steam supply pipe 33 connected to, for example, a valve stem leakage steam pipe of the steam control valve 4, and the warm-up steam supply pipe 33 has a control valve. 34 are provided. By the way, the opening degree of the control valve 34 is controlled by a bypass valve warm-up control device 35.
5, a temperature difference signal from the temperature difference detection device 32 is applied, and a control valve control signal is applied to the control valve 34 in response to the temperature difference signal.
第４図はその作動説明図であつて、上流側蒸気
室２１の蒸気温度をＡ、下流側蒸気室２２のメタ
ル温度をＣとする。いま、下流側蒸気室２２のメ
タル温度が或る温度Ｂ以下であり、上記上流側蒸
気室２１の蒸気温度Ａと下流側蒸気室２２のメタ
ル温度Ｃとの温度差が温度ＡとＢとの差T1以上
であると、前記温度差検出装置３２から出力され
る温度差信号が大であるため、前記バイパス弁暖
機制御装置３５によつて調節弁３４が開となり、
暖機蒸気供給管３３を経て暖機蒸気が下流側蒸気
室２２に供給され、下流側蒸気室２２のメタル温
度Ｃが上昇する。そこで、上記メタル温度が温度
Ｂより高い温度Ｄとなり、上流側蒸気室２１の蒸
気温度Ａとの差がT2となると、バイパス弁暖機
制御装置３５が調節弁閉信号を発生し、調節弁３
４は閉じられる。したがつて、下流側蒸気室メタ
ル温度Ｃはその後或程度上昇した後次第に低下
し、温度Ｂになり前記温度差がT1となると、再
び調節弁３４が開となり、下流側蒸気室メタル温
度Ｃが上昇せしめられる。すなわち、前記温度差
がT1以上になると調節弁３４が開らかれ、T2に
なると閉じるように制御される。 FIG. 4 is an explanatory diagram of the operation, in which the steam temperature in the upstream steam chamber 21 is A, and the metal temperature in the downstream steam chamber 22 is C. Now, the metal temperature of the downstream steam chamber 22 is below a certain temperature B, and the temperature difference between the steam temperature A of the upstream steam chamber 21 and the metal temperature C of the downstream steam chamber 22 is equal to the temperature A and B. If the difference is T1 or more, the temperature difference signal output from the temperature difference detection device 32 is large, so the bypass valve warm-up control device 35 opens the control valve 34,
Warm-up steam is supplied to the downstream steam chamber 22 via the warm-up steam supply pipe 33, and the metal temperature C of the downstream steam chamber 22 increases. Therefore, when the metal temperature becomes a temperature D higher than the temperature B, and the difference between the temperature and the steam temperature A in the upstream steam chamber 21 becomes T2 , the bypass valve warm-up control device 35 generates a control valve closing signal, and the control valve closes. 3
4 is closed. Therefore, the downstream steam chamber metal temperature C rises to a certain extent and then gradually decreases to temperature B. When the temperature difference reaches T1 , the control valve 34 is opened again, and the downstream steam chamber metal temperature C is forced to rise. That is, the control valve 34 is controlled to be opened when the temperature difference becomes T1 or more, and closed when the temperature difference becomes T2 .
このように、プラントの通常運転時において
は、下流側蒸気室２２のメタル温度に対応して、
弁座２３の下流側に暖機蒸気が送入され、弁ケー
シング２０の下流側蒸気室２２の室壁等の温度レ
ベルが一定以上に維持され、弁急開時における弁
座下流側の熱衝撃が緩和される。 In this way, during normal operation of the plant, depending on the metal temperature of the downstream steam chamber 22,
Warming-up steam is sent to the downstream side of the valve seat 23, and the temperature level of the chamber wall of the downstream side steam chamber 22 of the valve casing 20 is maintained above a certain level, thereby preventing thermal shock on the downstream side of the valve seat when the valve is suddenly opened. is alleviated.
また、タービンバイパス弁制御装置（図示せ
ず）には、タービンバイパス弁１２の開閉テスト
を行なう場合に作動してタービンバイパス弁１２
の開閉制御を行なう弁テスト制御装置３６が設け
られている（第３図）。この弁テスト制御装置３
６にはタービンバイパス弁の開閉テスト時にテス
ト要求信号ａが加えられるとともに、前記温度差
検出装置３２から温度差信号も加えられている。 Further, the turbine bypass valve control device (not shown) is configured to actuate the turbine bypass valve 12 when performing an opening/closing test of the turbine bypass valve 12.
A valve test control device 36 is provided for controlling the opening and closing of the valve (FIG. 3). This valve test control device 3
6 is applied with a test request signal a during an opening/closing test of the turbine bypass valve, and a temperature difference signal from the temperature difference detection device 32 is also applied thereto.
すなわち、暖機蒸気として蒸気加減弁の弁棒漏
えい蒸気を使用している場合、蒸気温度の低減も
考えられるため、自ずと低温蒸気室メタル温度の
最上昇値にも限界がある。したがつて、前記弁テ
スト制御装置３６は、温度差検出装置３２からの
温度差信号の大小によつて、第５図の如くタービ
ンバイパス弁１２の開閉テスト時における弁開度
率を変更するようにしてある。 That is, when leaking steam from a valve stem of a steam control valve is used as warm-up steam, there is a possibility that the steam temperature may be reduced, so there is naturally a limit to the maximum value of the temperature of the low-temperature steam chamber metal. Therefore, the valve test control device 36 changes the valve opening rate during the opening/closing test of the turbine bypass valve 12, as shown in FIG. 5, depending on the magnitude of the temperature difference signal from the temperature difference detection device 32. It is set as.
第５図は、弁テスト制御装置３６から出力され
る弁開度信号の変化線図であつて、上流側蒸気室
の蒸気温度と下流側蒸気室のメタル温度との温度
差が前記T2以上の場合には、タービンバイパス
弁１２の開度変化が線Ｍのようになるような信号
が出される。すなわち、タービンバイパス弁の弁
開後微少開度Ｉで一定時間その開度を保持してそ
の間暖機蒸気を流した後、タービンバイパス弁を
全開する。一方、上記温度差がT2以下の場合に
は、線Ｌのように、タービンバイパス弁を微少開
度で一旦保持することなく、全開させる。 FIG. 5 is a change diagram of the valve opening signal output from the valve test control device 36, and shows that the temperature difference between the steam temperature in the upstream steam chamber and the metal temperature in the downstream steam chamber is equal to or greater than T 2 . In this case, a signal is output such that the opening degree of the turbine bypass valve 12 changes as shown by line M. That is, after opening the turbine bypass valve, the opening degree is maintained at a slight opening degree I for a certain period of time, during which warm-up steam is allowed to flow, and then the turbine bypass valve is fully opened. On the other hand, when the above-mentioned temperature difference is T2 or less, as shown by line L, the turbine bypass valve is not held at a slight opening but is fully opened.
したがつて、バイパス弁テスト時においても、
上流側蒸気室の蒸気温度と下流側蒸気室のメタル
温度の温度差が大きい場合には、タービンバイパ
ス弁の微少開度で暖機された後、全開されるの
で、弁テスト時における熱応力も低い値になり、
弁テストによる弁ケーシング等の強度寿命消費も
低減される。 Therefore, even during the bypass valve test,
If the temperature difference between the steam temperature in the upstream steam chamber and the metal temperature in the downstream steam chamber is large, the turbine bypass valve is warmed up by a small opening and then fully opened, reducing thermal stress during valve testing. becomes a low value,
The strength life consumption of valve casings and the like due to valve testing is also reduced.
以上説明したように、本発明によれば、弁テス
ト時においても、タービンバイパス弁の上流側お
よび下流側の温度差が或る値以上の場合には、暖
機蒸気を流した後全開され、熱応力の発生が低下
せしめられ、弁テスト時における強度寿命消費を
低減させ、信頼性を高めることができる等の効果
を奏する。
As explained above, according to the present invention, even during a valve test, if the temperature difference between the upstream side and the downstream side of the turbine bypass valve is more than a certain value, the turbine bypass valve is fully opened after flowing warm-up steam, The generation of thermal stress is reduced, strength life consumption during valve testing is reduced, and reliability can be improved.
第１図はタービンバイパス装置を有するタービ
ンプラントの概略系統図、第２図はタービンバイ
パス弁の縦断面図、第３図は本発明のタービンバ
イパス弁暖機装置の系統図、第４図はその作動説
明図、第５図は弁テスト制御装置のバイパス弁開
度信号変化線図である。
１２……タービンバイパス弁、２０……弁ケー
シング、２１……上流側蒸気室、２２……下流側
蒸気室、２３……弁座、２４……弁体、３０……
第１の温度検出器、３１……第２の温度検出器、
３２……温度差検出装置、３３……暖機蒸気供給
管、３４……調節弁、３６……弁テスト制御装
置。
Fig. 1 is a schematic system diagram of a turbine plant having a turbine bypass device, Fig. 2 is a longitudinal sectional view of a turbine bypass valve, Fig. 3 is a system diagram of a turbine bypass valve warm-up device of the present invention, and Fig. 4 is its system diagram. The operation explanatory diagram, FIG. 5, is a bypass valve opening degree signal change diagram of the valve test control device. 12... Turbine bypass valve, 20... Valve casing, 21... Upstream steam chamber, 22... Downstream steam chamber, 23... Valve seat, 24... Valve body, 30...
First temperature detector, 31... second temperature detector,
32...Temperature difference detection device, 33...Warm-up steam supply pipe, 34...Control valve, 36...Valve test control device.
Claims (1)
度と下流側蒸気室メタル温度との温度差を検出す
る温度差検出装置と、上記温度差検出装置からの
温度差信号によつて、弁テスト時におけるタービ
ンバイパス弁の開度変化を変更せしめる弁テスト
制御装置とを設けたことを特徴とするタービンバ
イパス弁暖機装置。 ２ 温度差信号が所定値以上の場合には、タービ
ンバイパス弁が一定時間微少開度に保持された後
全開されるように、開度変化が変更されることを
特徴とする、特許請求の範囲第１項記載のタービ
ンバイパス弁暖機装置。[Scope of Claims] 1. A temperature difference detection device that detects a temperature difference between the steam temperature in the upstream steam chamber and the downstream steam chamber metal temperature of the turbine bypass valve, and a temperature difference signal from the temperature difference detection device. A turbine bypass valve warm-up device comprising a valve test control device that changes the opening degree change of the turbine bypass valve during a valve test. 2. Claims characterized in that when the temperature difference signal is greater than or equal to a predetermined value, the change in opening degree is changed such that the turbine bypass valve is held at a slight opening degree for a certain period of time and then fully opened. The turbine bypass valve warm-up device according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19561582A JPS5985403A (en) | 1982-11-08 | 1982-11-08 | Bypass-valve warming apparatus for turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19561582A JPS5985403A (en) | 1982-11-08 | 1982-11-08 | Bypass-valve warming apparatus for turbine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5985403A JPS5985403A (en) | 1984-05-17 |
| JPH0423088B2 true JPH0423088B2 (en) | 1992-04-21 |
Family
ID=16344107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19561582A Granted JPS5985403A (en) | 1982-11-08 | 1982-11-08 | Bypass-valve warming apparatus for turbine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5985403A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5018356A (en) * | 1990-10-10 | 1991-05-28 | Westinghouse Electric Corp. | Temperature control of a steam turbine steam to minimize thermal stresses |
| JP4990992B2 (en) * | 2010-03-12 | 2012-08-01 | 中国電力株式会社 | Leak detection device and leak detection method for turbine bypass valve |
| JP5959454B2 (en) * | 2013-03-08 | 2016-08-02 | 株式会社東芝 | Steam turbine system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54118902A (en) * | 1978-03-08 | 1979-09-14 | Toshiba Corp | Steam cut-off valve warming equipment |
| JPS5575509A (en) * | 1978-12-04 | 1980-06-06 | Toshiba Corp | By-pass system for turbine |
-
1982
- 1982-11-08 JP JP19561582A patent/JPS5985403A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54118902A (en) * | 1978-03-08 | 1979-09-14 | Toshiba Corp | Steam cut-off valve warming equipment |
| JPS5575509A (en) * | 1978-12-04 | 1980-06-06 | Toshiba Corp | By-pass system for turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5985403A (en) | 1984-05-17 |
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