JP2527712B2 - Steam valve test method and test apparatus - Google Patents
Steam valve test method and test apparatusInfo
- Publication number
- JP2527712B2 JP2527712B2 JP60188426A JP18842685A JP2527712B2 JP 2527712 B2 JP2527712 B2 JP 2527712B2 JP 60188426 A JP60188426 A JP 60188426A JP 18842685 A JP18842685 A JP 18842685A JP 2527712 B2 JP2527712 B2 JP 2527712B2
- Authority
- JP
- Japan
- Prior art keywords
- steam
- valve
- drain
- test
- drain pipe
- 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
Landscapes
- Details Of Valves (AREA)
Description
【発明の詳細な説明】 〔発明の利用分野〕 本発明は、複数系列の蒸気供給配管にそれぞれ設けら
れている蒸気弁（例えば再熱塞止弁，中間阻止弁など）
を、当該蒸気原動機プラントの運転中に個々に閉弁テス
トする方法、及びその装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Use of the Invention] The present invention relates to a steam valve (for example, a reheat blocking valve, an intermediate blocking valve, etc.) provided in each of a plurality of series of steam supply pipes.
The present invention relates to a method for individually performing a valve closing test during the operation of the steam engine plant, and an apparatus therefor.
〔発明の背景〕 第２図は、蒸気タービンＴに対して２系統の蒸気配管
A,Bによつて高温高圧の蒸気を供給する蒸気原動機プラ
ントの１例についての蒸気供給系統図である。[Background of the Invention] FIG. 2 shows two lines of steam piping for a steam turbine T.
It is a steam supply system diagram about an example of a steam engine plant which supplies high temperature and high pressure steam by A and B.
蒸気配管Ａには、上流側に再熱塞止弁1aが、その下流
側に中間阻止弁2aが、それぞれ設けられている。The steam pipe A is provided with a reheat blocking valve 1a on the upstream side and an intermediate blocking valve 2a on the downstream side.
また、蒸気配管Ｂには、上流側に再熱塞止弁1bが、そ
の下流側に中間阻止弁2bが、それぞれ設けられている。Further, the steam pipe B is provided with a reheat blocking valve 1b on the upstream side and an intermediate blocking valve 2b on the downstream side.
上記の再熱塞止弁1a,1bの上流側にはドレン配管6aが
接続され、ドレン配管8a及びドレン弁4bを介して復水器
に接続されている。A drain pipe 6a is connected to the upstream side of the reheat stop valves 1a and 1b, and is connected to the condenser via the drain pipe 8a and the drain valve 4b.
また、前記の中間阻止弁2a,2bの下流側にはドレン配
管6bが接続され、ドレン配管8bおよびドレン弁4bを介し
て復水器に接続されている。A drain pipe 6b is connected to the downstream side of the intermediate blocking valves 2a and 2b, and is connected to a condenser via a drain pipe 8b and a drain valve 4b.
上記の中間阻止弁2a,2bは、定期的（例えば毎週１
回）に、弁開閉テスト（弁テスト）される。この弁テス
トはタービン負荷運転中に中間阻止弁への制御（開閉）
信号に関係なく、テスト装置により中間阻止弁を開閉す
ることにより、十分に機能が発揮できることを定期的に
確認するものである。The above intermediate stop valves 2a and 2b are periodically (for example, 1 weekly).
The valve opening / closing test (valve test) is performed. This valve test controls (opens / closes) the intermediate blocking valve during turbine load operation.
Regardless of the signal, the test device opens and closes the intermediate blocking valve to periodically confirm that the function can be sufficiently performed.
蒸気タービンに複製系列の蒸気供給配管が設けられて
いる場合の主要蒸気弁（本例では、中間阻止弁2a,2b、
及び再熱塞止弁1a,1b）に設けられているドレン系統で
相互の共通母管6a,6bにドレン弁4a,4bを設けている場
合、ドレン配管が比較的長いことから、該ドレン配管か
らの放熱の為に、蒸気の一部が凝縮しドレン化して、ド
レン系統のドレン弁よりも上流側にタービン運転中にド
レンが溜つてしまう。この状態で複数個あるうち片側の
蒸気弁（中間阻止弁2a又は同2b）の全閉作動テストを実
施すると中間阻止弁の下流側の蒸気圧力が変動し、もう
一方の中間阻止弁の下流側との間に圧力差が発生し、タ
ービン運転中に溜つたドレンが弁テストを行なつた中間
阻止弁側に逆流してくる。この逆流してくるドレンによ
つて、高温になつている配管及び弁ケーシングは急冷さ
れ過大な熱応力が発生すると同時にドレンアタツクによ
る繰返し熱衝撃により亀裂（クラツク）が発生する危険
性が大である。The main steam valve (in this example, the intermediate stop valves 2a, 2b,
Also, in the case where the drain valves 4a and 4b are provided on the common mother pipes 6a and 6b in the drain system provided to the reheat stop valves 1a and 1b), the drain pipes are relatively long. Due to the heat radiation from the part, a part of the steam is condensed and drained, and the drain is accumulated upstream of the drain valve of the drain system during the turbine operation. If a full-closed operation test of one steam valve (intermediate blocking valve 2a or 2b) is performed in this state, the steam pressure at the downstream side of the intermediate blocking valve fluctuates, and at the downstream side of the other intermediate blocking valve. A pressure difference is generated between and, and the drain accumulated during the turbine operation flows back to the intermediate blocking valve side where the valve test was performed. Due to the backflowing drain, the piping and the valve casing, which are at a high temperature, are rapidly cooled and excessive thermal stress is generated, and at the same time, there is a great risk that cracks are generated by repeated thermal shock due to the drain attack.
第３図は上述の問題点の説明図である。鎖線で囲んで
示したＤ部およびＤ′部はドレンが溜まる部分を表わし
ている。FIG. 3 is an explanatory diagram of the above problems. The portions D and D ′ surrounded by the chain line represent the portions where drainage is accumulated.
圧力計のシボルマークで表わしたP1,P′1,P2,P′２は
それぞれの個所の圧力を示している。 P 1, P '1, P 2, P' 2 , expressed in Shiborumaku pressure gauge indicates a pressure of each point.
いま、２個の中間阻止弁2a,2bの内の片側2aをタービ
ンＴの稼働中に弁テストのために閉弁したとする。この
操作により、再熱塞止弁1a後の圧力P1と再熱塞止弁1b後
の圧力Ｐ′１との関係は、P1＞Ｐ′１となる。Now, assume that one side 2a of the two intermediate blocking valves 2a, 2b is closed for a valve test while the turbine T is in operation. By this operation, the relationship between the pressure P 1 after the reheat stop valve 1a and the pressure P ′ 1 after the reheat stop valve 1b is P 1 > P ′ 1 .
また、中間阻止弁2a後の圧力P2は、蒸気タービンＴの
内部圧力P3とほぼ等しくなる。ここで、弁テストを実施
することにより中間阻止弁2aは全閉となる、今まで中間
阻止弁2aともう一方の中間阻止弁2bとにはほぼ同一の流
量の蒸気が流れている状態であつたが、弁テストにより
中間阻止弁2aが全閉したことにより全流量分の蒸気が全
閉状態の中間阻止弁2b側へ流れるため、この中間阻止弁
2bの後の圧力Ｐ′２はP2よりも高くなる。The pressure P 2 after the intermediate blocking valve 2a becomes substantially equal to the internal pressure P 3 of the steam turbine T. Here, by performing a valve test, the intermediate blocking valve 2a is fully closed. Until now, the intermediate blocking valve 2a and the other intermediate blocking valve 2b are in a state in which almost the same flow rate of steam is flowing. However, since the intermediate blocking valve 2a was fully closed by the valve test, steam for the entire flow rate flows to the intermediate blocking valve 2b side in the fully closed state.
Pressure P '2 after the 2b is higher than P 2.
上記の圧力差P1＞Ｐ′１により、Ｄ部に溜まつていた
ドレンは矢印イの如く、弁テストを行つていない側の中
間阻止弁2b方向へ逆流する。Due to the above pressure difference P 1 > P ′ 1 , the drain accumulated in the portion D flows backward in the direction of the intermediate blocking valve 2b on the side where the valve test is not performed, as shown by the arrow a.
また、前記の圧力差Ｐ′２＞P2により、Ｄ′部に溜ま
つているドレンは矢印ロの如く弁テストを行つている側
の中間阻止弁2a方向へ逆流する。Further, due to the pressure difference P ′ 2 > P 2 , the drain accumulated in the D ′ portion flows backward in the direction of the intermediate blocking valve 2a on the side where the valve test is being performed as indicated by the arrow B.
この逆流したドレンは、高温になつている主要蒸気弁
や配管を急激に冷却し過大な熱応力の発生と共に、繰返
し熱衝撃により亀裂（クラツク）が発生し蒸気漏洩に至
る危険性が大であつた。This reverse flow of drain causes a large risk of vapor leakage due to repeated thermal shock causing cracks due to repeated thermal shocks as well as excessive thermal stress due to rapid cooling of the main steam valve and piping that are hot. It was
上記の不具合を防止するため、特公昭58−33363号に
記載された装置が公知である。In order to prevent the above-mentioned problems, the device described in Japanese Patent Publication No. 58-33363 is known.
上記の公知技術は、中間阻止弁の弁テスト時に高温に
なつている中間阻止弁へのドレン逆入（逆流）を防止し
て、亀裂発生時の事故を防止するための蒸気弁のドレン
流入防止装置であつて、このドレン流入防止装置の特徴
とするところは、複数系列の蒸気弁における下流側のド
レン配管を共通母管にして止め弁を設けると、弁テスト
時にタービン運転中に溜つたドレンが逆流するので、こ
のドレンの逆流を防止するために各々のドレン配管に逆
止弁を設けることにあつた。The above-mentioned known technique prevents the drain inflow of the steam valve for preventing the accident at the time of crack occurrence by preventing drain back-entry (reverse flow) into the intermediate stop valve, which is hot during the valve test of the intermediate stop valve. The feature of this drain inflow prevention device is that when a drain valve on the downstream side of multiple series steam valves is used as a common mother pipe and a stop valve is provided, the drain accumulated during turbine operation during valve test. Since a reverse flow occurs, a check valve was provided in each drain pipe in order to prevent the reverse flow of the drain.
しかし、この逆流防止のためにドレン配管に設けた逆
止弁よりも上流側、すなわち主要弁（中間阻止弁）から
逆止弁までの範囲はドレンの逆流防止にはならず、弁テ
スト時の圧力差によるドレンアタツクが発生してしまう
という問題が有る。However, the upstream side of the check valve provided in the drain pipe to prevent this backflow, that is, the range from the main valve (intermediate blocking valve) to the check valve, does not prevent drain backflow, and is There is a problem that a drain attack is generated due to the pressure difference.
本発明の目的は、前記公知の発明（特公昭58−33363
号）を改良して、通常運転中に溜まつたドレンが、中間
阻止弁の弁テスト時に、配管および弁ケーシングに逆流
して急冷することで繰り返し熱衝撃により発生する亀裂
（クラツク）を防止することを可能とする中間阻止弁の
試験方法と装置を提供することにある。The object of the present invention is to provide the above-mentioned known invention (Japanese Patent Publication No. 58-33363).
No.) is improved to prevent cracks (cracks) caused by repeated thermal shocks by drainage accumulated during normal operation by flowing back to the piping and valve casing and rapidly cooling during valve testing of the intermediate blocking valve. It is an object of the present invention to provide a test method and device for an intermediate blocking valve that enables the above.
上記の目的を達成するために創作した本発明方法につ
いて、先ず、その基本的な原理を略述する。Regarding the method of the present invention created to achieve the above object, the basic principle thereof will first be outlined.
本発明のポイントは、第３図について先に示したＤ
部、及びＤ′部に溜まつているドレンを、弁テストの開
始に先立つて予め復水器に排出することにある。ドレン
を予め排出すれば、当然に、ドレン逆流の虞れは無くな
る。The point of the present invention is that D shown in FIG.
Drain accumulated in the parts D and D'is discharged to the condenser in advance before the start of the valve test. If the drain is discharged in advance, naturally there is no fear of drain backflow.
上記の原理に基づいて前記の目的（ドレン逆流防止）
を達成するため、本発明の蒸気弁の試験方法は、同一の
蒸気タービンに高圧高温の蒸気を供給する複数系列の蒸
気配管を設けるとともに、上記複数系列の蒸気配管それ
ぞれの途中に蒸気弁を設け、かつ、上記蒸気弁の下流側
にドレン配管及びドレン弁を設けた蒸気原動機プラント
の蒸気弁を、当該蒸気原動機プラントの運転中に個々に
閉弁試験する方法において、前記の蒸気弁の内の何れか
一つを閉弁するに先立つて、前記のドレン弁を微開し、
ドレン配管内に溜まつているドレンを排出し、前記蒸気
弁の何れか一つを閉弁したときにドレン配管内のドレン
が逆流する虞れを無からしめることを特徴とする。Based on the above principle, the above purpose (prevention of drain backflow)
In order to achieve the above, the steam valve test method of the present invention provides a plurality of series of steam pipes for supplying high-pressure and high-temperature steam to the same steam turbine, and a steam valve is provided in the middle of each of the plurality of series of steam pipes. And, the steam valve of the steam engine plant provided with a drain pipe and a drain valve on the downstream side of the steam valve, in the method of individually performing a valve closing test during the operation of the steam engine plant, in the steam valve, Prior to closing any one, slightly open the drain valve,
The drain accumulated in the drain pipe is discharged, and when any one of the steam valves is closed, the drain in the drain pipe is prevented from flowing backward.
上記の弁テストはタービンＴの運転中に行うので、該
タービンの蒸気供給配管には高温高圧の蒸気が流れてい
る。従つて、前記ドレン弁の開度は微開でなければなら
ない。Since the above valve test is performed during the operation of the turbine T, high temperature and high pressure steam is flowing through the steam supply pipe of the turbine. Therefore, the opening degree of the drain valve must be slightly opened.
また、上記の発明方法を行うに当つて、ドレン配管内
のドレンの排出が完了したが否かを目視確認することが
できない。そこで、ドレン排出の完了を容易に確認し
て、上記発明方法を容易に実施できるようにするため、
本発明の蒸気弁試験装置は、同一の蒸気タービンに高圧
高温の蒸気を供給する複数系列の蒸気配管を設けるとと
もに、上記複数系列の蒸気配管それぞれの途中に蒸気弁
を設け、かつ、上記蒸気弁の下流側にドレン配管及びド
レン弁を設けた蒸気原動機プラントにおいて、上記のド
レン弁の直近の上流側にドレン配管内の流体の温度を検
出する温度計を設けたことを特徴とする。Further, in carrying out the above-mentioned method of the invention, it is not possible to visually confirm whether or not drainage in the drain pipe has been completed. Therefore, in order to easily confirm the completion of drain discharge and to easily carry out the method of the invention,
The steam valve test apparatus of the present invention is provided with a plurality of series of steam pipes for supplying high-pressure and high-temperature steam to the same steam turbine, and a steam valve is provided in the middle of each of the plurality of series of steam pipes, and the steam valve In the steam engine plant in which the drain pipe and the drain valve are provided on the downstream side of the above, a thermometer for detecting the temperature of the fluid in the drain pipe is provided on the upstream side in the immediate vicinity of the drain valve.
第１図は、本発明方法の１実施例におけるインターロ
ックを示すフローチャートである。FIG. 1 is a flowchart showing an interlock in one embodiment of the method of the present invention.
ステップＥで、主要蒸気弁（本例においては中間阻止
弁2a,2b若しくは再熱塞止弁1a,1bの内の何れか一つ）の
テスト指令が出ると、ステップＧの弁テスト開始の前
に、必ずドレン弁が微開したかどうかを確認する。（ス
テップＦ）。この時にドレン弁が微開していなければ弁
テストは実施できない。ドレン弁微開が確認されれば主
要蒸気弁の弁テストは実施され、弁テスト実施に伴ない
微開しているドレン弁は全閉状態へと戻す（ステップ
Ｈ）。この一連のインターロックに従つて弁テストを実
施することによつて、ドレン配管に溜つたドレンは全て
復水器側へと排出されるためにドレンアタツクによる熱
衝撃がなくなり、弁ケーシングや配管に亀裂（クラツ
ク）の発生することを防止できる。In step E, when a test command for the main steam valve (either one of the intermediate blocking valves 2a and 2b or the reheat stop valves 1a and 1b in this example) is issued, before the valve test in step G is started. First, make sure that the drain valve is slightly opened. (Step F). At this time, the valve test cannot be performed unless the drain valve is slightly opened. If it is confirmed that the drain valve is slightly opened, the valve test of the main steam valve is performed, and the drain valve that is slightly opened is returned to the fully closed state in accordance with the valve test (step H). By performing the valve test according to this series of interlocks, all the drain accumulated in the drain pipe is discharged to the condenser side, so that the thermal shock due to the drain attack disappears and the valve casing and pipe are cracked. (Crack) can be prevented from occurring.
第４図は上記実施例を改良した実施例の説明図であつ
て、この実施例の方法を実施するために構成した本発明
装置の１実施例を描いた系統図である。FIG. 4 is an explanatory view of an improved embodiment of the above embodiment, and is a system diagram depicting one embodiment of the apparatus of the present invention configured to carry out the method of this embodiment.
ドレン弁4a,4bそれぞれの直近の上流側に、ドレン配
管内の液体の温度を検出する温度計7a,7bを設けてあ
る。Thermometers 7a and 7b for detecting the temperature of the liquid in the drain pipe are provided immediately upstream of the drain valves 4a and 4b, respectively.
通常運転状態で低温のドレン配管の放熱によつて凝縮
した一部の蒸気はドレン化しドレン弁4a,4bの上流側に
溜るが、この溜つたドレンは低温である。ここでドレン
弁を微開することによつてドレンは蒸気の一部と共に復
水器へ排出されるためドレン弁の上流側に高温高圧蒸気
の１部が流入してくる。この高温高圧蒸気は、この場所
に停溜していると降温してドレンとなるが、前述の如く
ドレン弁が微開しているときは僅かに流動しているので
高温高圧の状態である。この高温高圧蒸気がドレン弁直
近の上流まで流動したことを、温度計7a,7bで検知する
と、「ドレン排出完了」と判定し得る。In the normal operation state, a part of the vapor condensed by the radiation of the low temperature drain pipe is drained and accumulated on the upstream side of the drain valves 4a and 4b, but the accumulated drain is low temperature. Since the drain is discharged to the condenser together with a part of the steam by opening the drain valve slightly, a part of the high-temperature high-pressure steam flows into the upstream side of the drain valve. This high-temperature and high-pressure steam is cooled when it stays in this place and becomes a drain, but it is in a high-temperature and high-pressure state because it slightly flows when the drain valve is slightly opened as described above. When the thermometers 7a and 7b detect that the high-temperature high-pressure steam has flowed to the immediate vicinity of the drain valve, it can be determined that "drain discharge is completed".
本実施例においては、温度計7a,7bの指示温度がそれ
ぞれ予め設定した温度以上となることを、弁テスト開始
の許可条件とする。これにより、一層信頼性の高いイン
ターロックとなり、ドレンアタツクによる熱衝撃を皆無
とすることが可能となる。In the present embodiment, the permitting condition for starting the valve test is that the indicated temperatures of the thermometers 7a and 7b are equal to or higher than the preset temperatures. This makes the interlock even more reliable, and eliminates the thermal shock caused by the drain attack.
以上詳述したように、本発明の蒸気弁試験方法によれ
ば、ドレンが逆流する虞れなく弁テストを行うことがで
き、ドレン逆流に起因する亀裂発生を未然に防止できる
という優れた実用的効果を奏し、蒸気原動機プラントの
信頼性，耐久性の向上に貢献するところ多大である。As described above in detail, according to the steam valve test method of the present invention, it is possible to perform a valve test without the risk of drain backflow, and it is possible to prevent the occurrence of cracks due to drain backflow. It is a great place to produce the effect and contribute to the improvement of the reliability and durability of the steam engine plant.
また、本発明の蒸気弁試験装置によれば、上記の試験
方法を容易に、かつ確実に実施することができ、その効
果を充分に発揮せしめ得る。Further, according to the steam valve test apparatus of the present invention, the above-mentioned test method can be easily and reliably carried out, and the effect thereof can be sufficiently exhibited.
第１図は本発明の試験方法の１実施例におけるインター
ロツクフロー図である。第２図は蒸気タービンの高圧蒸
気供給系統図の１例である。第３図は弁テストにおける
ドレン逆流現象の説明図である。第４図は本発明の蒸気
弁試験装置の１実施例の系統図である。 1a,1b……再熱塞止弁、2a,2b……中間阻止弁、4a,4b…
…ドレン弁、5a,5b……バランス管、6a,6b……ドレン配
管、7a,7b……温度計、8a,8b……ドレン配管、Ｔ……蒸
気タービン。FIG. 1 is an interlock flow chart in one embodiment of the test method of the present invention. FIG. 2 is an example of a high pressure steam supply system diagram of a steam turbine. FIG. 3 is an explanatory diagram of the drain backflow phenomenon in the valve test. FIG. 4 is a system diagram of one embodiment of the steam valve test apparatus of the present invention. 1a, 1b …… Reheat stop valve, 2a, 2b …… Intermediate stop valve, 4a, 4b…
… Drain valve, 5a, 5b …… Balance pipe, 6a, 6b …… Drain pipe, 7a, 7b …… Thermometer, 8a, 8b …… Drain pipe, T …… Steam turbine.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 前田 高義 日立市幸町３丁目１番１号 株式会社日 立製作所日立工場内 (72)発明者 池田 啓 日立市幸町３丁目１番１号 株式会社日 立製作所日立工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takayoshi Maeda 3-1-1 Hitachi-machi, Hitachi-shi, Hitachi City Inside the Hitachi Factory of Hitachi, Ltd. (72) Inventor Kei Ikeda 3-1-1 Hitachi-machi, Hitachi City Company Hitachi Factory, Hitachi factory
Claims (3)
給する複数系列の蒸気配管を設けるとともに、上記複数
系列の蒸気配管それぞれの途中に蒸気弁を設け、かつ、
上記蒸気弁の下流側にドレン配管及びドレン弁を設けた
蒸気原動機プラントの蒸気弁を、当該蒸気原動機プラン
トの運転中に個々に閉弁試験する方法において、前記の
蒸気弁の内の何れか一つを閉弁するに先立って、前記の
ドレン弁を微開し、ドレン配管内に溜っているドレンを
排出し、前記蒸気弁の何れか一つを閉弁したときにドレ
ン配管内のドレンが逆流する虞れを無からしめることを
特徴とする、蒸気弁の試験方法。1. A plurality of series of steam pipes for supplying high-pressure and high-temperature steam to the same steam turbine, and a steam valve in the middle of each of the plurality of series of steam pipes, and
A steam valve of a steam engine plant provided with a drain pipe and a drain valve on the downstream side of the steam valve, in a method of individually performing a valve closing test during the operation of the steam engine plant, any one of the steam valves Prior to closing one of the steam valves, the drain valve is opened slightly, the drain accumulated in the drain pipe is discharged, and when any one of the steam valves is closed, the drain pipe is drained. A method for testing a steam valve, which is characterized in that there is no risk of backflow.
度計を設けたものとし、該温度計の指度の上昇状態によ
ってドレンの排出完了を判断することを特徴とする特許
請求の範囲第１項に記載の蒸気弁の試験方法。2. The drain valve is provided with a thermometer on the immediate upstream side thereof, and the completion of drain discharge is judged by the rising state of the finger of the thermometer. The test method for the steam valve according to the first item of the range.
給する複数系列の蒸気配管を設けるとともに、上記複数
系列の蒸気配管それぞれの途中に蒸気弁を設け、かつ、
上記蒸気弁の下流側にドレン配管及びドレン弁を設けた
蒸気原動機プラントにおいて、上記のドレン弁の直近の
上流側にドレン配管内の液体の温度を検出する温度計を
設けたことを特徴とする蒸気弁の試験装置。3. A plurality of series of steam pipes for supplying high-pressure and high-temperature steam to the same steam turbine, and a steam valve in the middle of each of the plurality of series of steam pipes, and
In a steam engine plant provided with a drain pipe and a drain valve on the downstream side of the steam valve, a thermometer for detecting the temperature of the liquid in the drain pipe is provided on the upstream side in the immediate vicinity of the drain valve. Steam valve test equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60188426A JP2527712B2 (en) | 1985-08-29 | 1985-08-29 | Steam valve test method and test apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60188426A JP2527712B2 (en) | 1985-08-29 | 1985-08-29 | Steam valve test method and test apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6249086A JPS6249086A (en) | 1987-03-03 |
| JP2527712B2 true JP2527712B2 (en) | 1996-08-28 |
Family
ID=16223462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60188426A Expired - Lifetime JP2527712B2 (en) | 1985-08-29 | 1985-08-29 | Steam valve test method and test apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2527712B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5833363A (en) * | 1981-08-21 | 1983-02-26 | Hitachi Ltd | Producing circuit of synchronizing signal |
-
1985
- 1985-08-29 JP JP60188426A patent/JP2527712B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5833363A (en) * | 1981-08-21 | 1983-02-26 | Hitachi Ltd | Producing circuit of synchronizing signal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6249086A (en) | 1987-03-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP7084155B2 (en) | Tube leak detection device and tube leak detection method | |
| KR860007454A (en) | Operation protection device and method of water heater | |
| RU2445469C2 (en) | Gas turbine expansion compensator (versions) and method of providing fluid flowing from exhaust channel | |
| RU2498098C2 (en) | Turbine cooling system and method of cooling turbine section with intermediate pressure | |
| EP0933505A2 (en) | Steam cooled system in combined cycle power plant | |
| JP2527712B2 (en) | Steam valve test method and test apparatus | |
| US5027507A (en) | Method for controlling leakage through degraded heat exchanger tubes in the tubesheet region of a nuclear generator | |
| JP2002364802A (en) | Exhaust heat recovery system | |
| JP2005030318A (en) | Gas turbine | |
| JPS5833363B2 (en) | Steam valve drain inflow prevention device | |
| JP4679873B2 (en) | Exhaust heat boiler that detects abnormal exhaust gas outlet temperature | |
| JP3100311B2 (en) | Boiler reheat steam system | |
| JP2734372B2 (en) | Waste heat recovery boiler | |
| Gremaud | HRSG inspection, maintenance and repair | |
| JPS6146895A (en) | Heat pipe type heat exchanger | |
| JPH07279614A (en) | By-pass valve automatically warming device | |
| JPS6166996A (en) | Method and device for inhibiting hammering | |
| JPH07280490A (en) | Method for emergency measure against leakage of water of heat transfer tube and method for removal of stain inside tube, in operation | |
| Radin et al. | Connecting the second exhaust-heat boiler to the operating first one under the conditions of flow circuits of combined-cycle plants with two gas-turbine units and one steam turbine | |
| JPH11210407A (en) | Method and device for warming up bypass valve in steam plant | |
| US3187727A (en) | Steam generator | |
| JPH02150604A (en) | Method for preventing breakdown of moisture content separating heater drum and device therefor | |
| EP2796807B1 (en) | Method for protecting a condenser against overheating | |
| CN115264404A (en) | Intelligent moment blowoff valve | |
| JPH11159875A (en) | Water heater |