JPH01116204A - Cooling device for steam turbine - Google Patents
Cooling device for steam turbineInfo
- Publication number
- JPH01116204A JPH01116204A JP27255487A JP27255487A JPH01116204A JP H01116204 A JPH01116204 A JP H01116204A JP 27255487 A JP27255487 A JP 27255487A JP 27255487 A JP27255487 A JP 27255487A JP H01116204 A JPH01116204 A JP H01116204A
- Authority
- JP
- Japan
- Prior art keywords
- steam turbine
- steam
- air introduction
- introduction nozzle
- residual pressure
- 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.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims description 23
- 238000012790 confirmation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Control Of Turbines (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、蒸気タービンの停止後強制冷却により短時
間でタービンケーシングおよびロータを強制冷却する蒸
気タービンの冷却装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a steam turbine cooling device that forcibly cools a turbine casing and a rotor in a short period of time by forced cooling after the steam turbine is stopped.
蒸気タービンの冷却装置の従来技術として、特公昭４９
−２４２４１号公報による冷却装置が公知である。第３
図は従来例による蒸気タービンの冷却装置の配管部分の
一部断面図である。As a conventional technology for steam turbine cooling equipment,
A cooling device according to Japanese Patent No. 24241 is known. Third
The figure is a partial sectional view of a piping portion of a conventional steam turbine cooling device.
ボイラによって発生された蒸気は、主蒸気配管５を通っ
て蒸気タービンで仕事をした後復水器へ流入する。この
蒸気タービンは高温蒸気によってそれ自身高温となって
いるのでタービン停止後冷却完了までの時間は長くなる
。従来温度の高い蒸気タービンを急速に冷却するため主
蒸気配管５に空気導入ノズル取付座管６が設けられてい
る。蒸気タービンの運転時には、空気導入ノズルは取除
かれて、空気導入ノズル取付座管は盲フランジ９により
気密に保たれている。タービン停止後盲フランジ９が除
かれ、空気導入装置が接続される。The steam generated by the boiler passes through the main steam pipe 5, performs work in the steam turbine, and then flows into the condenser. Since this steam turbine itself is at a high temperature due to the high-temperature steam, it takes a long time to complete cooling after the turbine is stopped. Conventionally, an air introduction nozzle mounting seat pipe 6 is provided in the main steam pipe 5 in order to rapidly cool down a steam turbine that has a high temperature. When the steam turbine is in operation, the air introduction nozzle is removed and the air introduction nozzle mounting seat tube is kept airtight by the blind flange 9. After the turbine is stopped, the blind flange 9 is removed and the air introduction device is connected.
即ち、空気導入ノズルが空気導入ノズル取付座管６に装
着され、冷却用空気は空気圧縮機によりタービンｌに流
入し、ケーシングおよびロータを冷却した後空気放出口
から外部に放出される。この貫流空気によりタービンケ
ーシングおよびロータは早急に冷却される。タービン冷
却後は再び空気導入ノズルは取外されて盲フランジが取
付けられる。That is, the air introduction nozzle is attached to the air introduction nozzle mounting seat pipe 6, and the cooling air flows into the turbine 1 by the air compressor, cools the casing and the rotor, and then is discharged to the outside from the air discharge port. The turbine casing and rotor are rapidly cooled by this flow-through air. After cooling the turbine, the air introduction nozzle is removed again and a blind flange is installed.
前記の蒸気タービンの冷却装置では、運転時に空気導入
ノズル取付用座管に単体の盲フランジを取付けているた
め、特に高温高圧の蒸気タービンの主蒸気管または主蒸
気流入部ケーシングに空気導入ノズル取付用座管を設置
した場合、空気導入ノズル取付の際盲フランジを取外す
時に配管又はケーシング内の残圧の有無が確認できない
ため盲フランジ取外し時に危険であり、かつ残圧が微圧
のとき確認が難しいという欠点があった。In the above-mentioned steam turbine cooling system, a single blind flange is attached to the seat pipe for attaching the air introduction nozzle during operation, so it is especially difficult to attach the air introduction nozzle to the main steam pipe or main steam inlet casing of a high-temperature, high-pressure steam turbine. If a seat pipe is installed, it is dangerous to remove the blind flange because it is impossible to check whether there is residual pressure in the piping or casing when removing the blind flange when installing the air introduction nozzle, and it is difficult to check when the residual pressure is small. The drawback was that it was difficult.
本発明は、空気導入ノズル取付用座管に空気導入ノズル
を取付ける際盲フランジを取付けたまま蒸気タービンケ
ーシングまたはそれに接続した配管の残圧の有無が確認
できる蒸気タービンの冷却装置を提供することを目的と
する。An object of the present invention is to provide a cooling device for a steam turbine in which the presence or absence of residual pressure in a steam turbine casing or piping connected thereto can be confirmed with a blind flange attached when an air introduction nozzle is attached to a seat pipe for attaching the air introduction nozzle. purpose.
本発明は、蒸気タービンケーシングもしくはそれに接続
する配管に接続された空気導入ノズル取付用座管に、少
なくとも１個の残圧確認弁と一体に構成した盲フランジ
または前記少なくとも１個の残圧確認弁を着脱可能の盲
フランジを設けた。The present invention provides a blind flange integrated with at least one residual pressure check valve or the at least one residual pressure check valve on a seat pipe for installing an air introduction nozzle connected to a steam turbine casing or piping connected thereto. A removable blind flange is provided.
本発明によれば、蒸気タービン停止後蒸気タービンを強
制冷却するとき、空気導入ノズル取付に先立って、空気
導入ノズル取付用座管に結合された盲フランジに一体に
構成された残圧確認弁を開放するか、又は前記盲フラン
ジに残圧確認弁を取付けて該残圧確認弁を開放して残圧
蒸気を流し、間接目視手段により蒸気残圧の有無を確認
する。According to the present invention, when the steam turbine is forcibly cooled after the steam turbine is stopped, the residual pressure check valve integrated with the blind flange connected to the air introduction nozzle mounting seat pipe is installed prior to the installation of the air introduction nozzle. Either open it, or attach a residual pressure check valve to the blind flange, open the residual pressure check valve to allow residual pressure steam to flow, and check the presence or absence of steam residual pressure by indirect visual inspection means.
以下図面に基いて本発明の詳細な説明する。 The present invention will be described in detail below based on the drawings.
第１図は本発明の実施例による蒸気タービンの冷却装置
の冷却系統図、第２図は第１図の冷却装置の配管部の一
部断面図である。FIG. 1 is a cooling system diagram of a steam turbine cooling device according to an embodiment of the present invention, and FIG. 2 is a partial sectional view of a piping section of the cooling device of FIG.
第１図、第２図において、蒸気タービンの運転時には主
蒸気管５は空気導入ノズル取付座管６と１個ないし圧力
が高い場合には２個の直列接続された残圧確認弁１０と
一体になった盲フランジ９で閉塞されるか、また−は残
圧確認弁１０を着脱可能の盲フランジ９で閉塞されてい
る。蒸気タービン冷却の際は盲フランジの取外しに先立
って残圧確認弁１０を開放し、蒸気タービンケーシング
またはそれに結合する配管の残圧蒸気を流し、間接目視
手段（１例として主蒸気配管内の蒸気を吹付けて曇れば
蒸気残圧あり、曇らなければ蒸気残玉なし）により蒸気
残圧の有無を確認できる。蒸気残圧があるときには、主
蒸気配管内の蒸気をドレン弁から逃がし次第に残圧をな
くする。蒸気残土 −が零となってから前記盲フランジ
を取はずし、生空気導入装置を接続する。即ち、空気導
入ノズル取付座管に空気導入ノズルを取付け、空気圧縮
機８より送求された冷却空気を空気導入ノズル７を介し
て主蒸気管５へ送入し、８らに冷却空気は主蒸気止め弁
２、主蒸気加減弁３を通って蒸気タービン１内に入り該
蒸気タービン１を冷却してから空気放出口４より大気に
放出される。1 and 2, when the steam turbine is in operation, the main steam pipe 5 is integrated with the air introduction nozzle mounting seat pipe 6 and one or, if the pressure is high, two residual pressure check valves 10 connected in series. Either the residual pressure check valve 10 is closed with a blind flange 9 to which the residual pressure check valve 10 can be attached and detached. When cooling the steam turbine, the residual pressure check valve 10 is opened prior to removing the blind flange, the residual pressure steam in the steam turbine casing or the piping connected to it is allowed to flow, and the steam in the main steam piping is If it becomes cloudy when sprayed, there is residual steam pressure, and if it is not cloudy, there is no residual steam.) You can check whether there is residual steam pressure. When there is residual steam pressure, the steam in the main steam piping is released from the drain valve to gradually eliminate the residual pressure. After the residual steam content becomes zero, remove the blind flange and connect the live air introduction device. That is, an air introduction nozzle is attached to the air introduction nozzle mounting seat pipe, and the cooling air sent from the air compressor 8 is sent to the main steam pipe 5 through the air introduction nozzle 7, and the cooling air is sent to the main steam pipe 5 through the air introduction nozzle 7. The air enters the steam turbine 1 through the steam stop valve 2 and the main steam control valve 3, cools the steam turbine 1, and then is released into the atmosphere through the air outlet 4.
本発明によれば、蒸気タービンの空気導入ノズル取付用
座管に、少なくとも１個の残玉確認弁と一体に構成した
盲フランジまたは少なくとも１個の残圧確認弁を着脱可
能の盲フランジを設け、蒸気タービンケーシングもしく
はそれに接続する配管の残圧を確認するので、残圧があ
る場合には蒸気を逃してから盲フランジをはずして空気
導入ノズル取付用座管に空気導入ノズルを取付けて冷却
空気を導入させるため、蒸気の残圧による人身事故を容
品に防止できる。According to the present invention, a blind flange integrated with at least one residual pressure check valve or a blind flange to which at least one residual pressure check valve can be attached and detached is provided on a seat pipe for mounting an air introduction nozzle of a steam turbine. , the residual pressure in the steam turbine casing or the piping connected to it is checked, so if there is residual pressure, release the steam, remove the blind flange, install the air introduction nozzle on the air introduction nozzle mounting seat tube, and install the cooling air. This prevents personal injury caused by the residual pressure of steam into the container.
第１図は本発明の実施例による蒸気タービンの冷却装置
の冷却系統図、第２図は第１図の冷却装置の配管部分の
一部断面図、第３図は従来例による蒸気タービンの冷却
装置の配管部分の一部断面図である。
１：蒸気タービン、５：主蒸気配管、６：空気導入ノズ
ル取付座管、７：空気導入ノズル、８：、空気圧縮機、
９：盲フランジ、１０：残圧確認弁。Fig. 1 is a cooling system diagram of a steam turbine cooling device according to an embodiment of the present invention, Fig. 2 is a partial sectional view of the piping section of the cooling device of Fig. 1, and Fig. 3 is a cooling system diagram of a steam turbine according to a conventional example. FIG. 3 is a partial cross-sectional view of the piping section of the device. 1: Steam turbine, 5: Main steam piping, 6: Air introduction nozzle mounting seat pipe, 7: Air introduction nozzle, 8: Air compressor,
9: Blind flange, 10: Residual pressure confirmation valve.
Claims (1)
管に空気導入ノズル取付用座管を備え、タービン停止の
際空気導入装置を前記空気導入ノズル取付用座管に接続
して蒸気タービン内に空気を導入し、該空気によってタ
ービンケーシングおよびロータを強制冷却する蒸気ター
ビンにおいて、前記空気導入ノズル取付用座管に、少な
くとも１個の残圧確認弁と一体に構成した盲フランジま
たは前記少なくとも１個の残圧確認弁を着脱可能の盲フ
ランジを設け、前記蒸気タービンケーシングもしくはそ
れに接続する配管の残圧を確認することを特徴とする蒸
気タービンの冷却装置。1) A steam turbine casing or piping connected thereto is provided with an air introduction nozzle mounting seat pipe, and when the turbine is stopped, an air introduction device is connected to the air introduction nozzle mounting seat pipe to introduce air into the steam turbine; In the steam turbine in which a turbine casing and a rotor are forcibly cooled by the air, a blind flange integrally formed with at least one residual pressure confirmation valve or the at least one residual pressure confirmation valve is provided on the air introduction nozzle mounting seat pipe. A cooling device for a steam turbine, characterized in that a removable blind flange is provided to check the residual pressure of the steam turbine casing or piping connected thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27255487A JPH0610405B2 (en) | 1987-10-28 | 1987-10-28 | Steam turbine cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27255487A JPH0610405B2 (en) | 1987-10-28 | 1987-10-28 | Steam turbine cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01116204A true JPH01116204A (en) | 1989-05-09 |
| JPH0610405B2 JPH0610405B2 (en) | 1994-02-09 |
Family
ID=17515523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27255487A Expired - Lifetime JPH0610405B2 (en) | 1987-10-28 | 1987-10-28 | Steam turbine cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0610405B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650106A (en) * | 1992-07-28 | 1994-02-22 | Toshiba Corp | Cooling/heating device for steam turbine |
| JPH06117204A (en) * | 1992-10-05 | 1994-04-26 | Toshiba Corp | Forced cooling device for steam turbine |
-
1987
- 1987-10-28 JP JP27255487A patent/JPH0610405B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0650106A (en) * | 1992-07-28 | 1994-02-22 | Toshiba Corp | Cooling/heating device for steam turbine |
| JPH06117204A (en) * | 1992-10-05 | 1994-04-26 | Toshiba Corp | Forced cooling device for steam turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0610405B2 (en) | 1994-02-09 |
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Legal Events
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| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
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