JPS61132708A - Security unit in steam turbine plant - Google Patents

Security unit in steam turbine plant

Info

Publication number
JPS61132708A
JPS61132708A JP25271284A JP25271284A JPS61132708A JP S61132708 A JPS61132708 A JP S61132708A JP 25271284 A JP25271284 A JP 25271284A JP 25271284 A JP25271284 A JP 25271284A JP S61132708 A JPS61132708 A JP S61132708A
Authority
JP
Japan
Prior art keywords
valve
trip
supply line
pressure
oil
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.)
Pending
Application number
JP25271284A
Other languages
Japanese (ja)
Inventor
Keiichi Kuroki
黒木　慶一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP25271284A priority Critical patent/JPS61132708A/en
Publication of JPS61132708A publication Critical patent/JPS61132708A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
    • F01D21/16—Trip gear

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Turbines (AREA)

Abstract

PURPOSE:To expedite drop of emergency hydraulic pressure in an emgency case. by installing a hydraulic pressure holding unit for checking reverse flow of pressure oil and a relay valve for making a changeover between hold and release of pressure oil, in a pressure oil supply line by which a master trip valve is maintained at a normal position. CONSTITUTION:In a turbine security unit in which the operation of a master trip valve 3 is switched by a mechanical trip valve 1 or a master trip solenoid valve 2, a solenoid valve 2 and a relay 20 are provided in a supply line 10 of pressure oil which holds the master trip valve 3 in its normal position. A check valve CV for preventing reverse flow of pressure oil from the trip valve 3 to the solenoid valve 2 is installed on the way of an emergency oil supply line 21 and three lines 23-25 are branched from the line 21. When the solenoid valve 2 is operated by a trip signal S3, the oil pressure in the line 21 drops to get a relay valve 20 operated, so as to have the line 25 connected to a line 26, thereby the trip valve operates rapidly to open the steam valve quickly.

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の保安装置に係り、特
に、タービン異常時に運転を停止させるタービントリッ
プ機能を向上させることができるようにした蒸気タービ
ンプラントの保安装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a safety device for a steam turbine plant, and particularly to a steam turbine plant that is capable of improving a turbine trip function that stops operation when a turbine abnormality occurs. related to safety devices.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

発電所等に用いられる蒸気タービンプラン１〜は、−・
般に、過速防止用の保安装置が採用されでいる。Steam turbine plans 1~ used in power plants etc. are -・
Generally, a safety device is used to prevent overspeeding.

この保安装置は、非常時に主要な蒸気弁を油圧により全
閉して蒸気タービンを停止させるものであって、第５図
および第６図に示すように、メカニカルトリップ弁１お
よびマスタートリップ電磁弁２によりマスタートリップ
弁３を切換作動させて然気弁駆動部４に全閉動作を行わ
せるものである。This safety device completely closes the main steam valves using hydraulic pressure to stop the steam turbine in an emergency.As shown in FIGS. 5 and 6, the safety device includes a mechanical trip valve 1 and a master trip solenoid valve 2. This switches the master trip valve 3 and causes the air valve drive section 4 to perform a fully closing operation.

すなわち、正常運転時、非常用の高圧油は、メカニカル
トリップ弁１（以下ＭＴＶＩという。）。That is, during normal operation, the emergency high pressure oil is the mechanical trip valve 1 (hereinafter referred to as MTVI).

ロックアウト弁５（以下ＭＬＶ５という。）およびマス
タートリップ弁３（以下ＥＴＶ３という、）を通って蒸
気弁駆動部４へ送給されている。これにより蒸気弁が開
放状態に保持される。そして、タービンの過速や手動操
作等によるタービントリップ時には、ＭＴＶＩが油圧ト
リップ信号Ｓ１により図示位置に切換えられ、非常用高
圧油供給ライン６がドレンライン７にバイパスされ、上
記非常油供給うイン６の油圧が下がる。このため、オリ
フィス９を配した非常油供給ライン１０内の油圧すなわ
ち、ＥＴＶ３のピストン１１に加えられる油圧が下降し
て、上記ピストン１１が第６図左方側（第５図右方側）
にスプリング作動される。It is fed to the steam valve drive unit 4 through a lockout valve 5 (hereinafter referred to as MLV5) and a master trip valve 3 (hereinafter referred to as ETV3). This keeps the steam valve open. In the event of a turbine trip due to turbine overspeed or manual operation, the MTVI is switched to the illustrated position by the hydraulic trip signal S1, the emergency high pressure oil supply line 6 is bypassed to the drain line 7, and the emergency oil supply line 6 is bypassed to the drain line 7. oil pressure drops. Therefore, the oil pressure in the emergency oil supply line 10 in which the orifice 9 is arranged, that is, the oil pressure applied to the piston 11 of the ETV 3, decreases, and the piston 11 moves to the left side in Figure 6 (right side in Figure 5).
spring actuated.

これによって蒸気弁駆動部４への非常油供給ライン１２
内の圧油がドレンライン１３から排出され、前記蒸気弁
駆動部４にて蒸気弁が全閉される。This allows the emergency oil supply line 12 to the steam valve drive unit 4 to
The pressure oil inside is discharged from the drain line 13, and the steam valve is fully closed by the steam valve drive section 4.

また、ＭＬＶ５は、ロックアウト信号８２を受（プて他
系統の高圧油をＥ下■３側に送給し、非常油を保持する
機能を有している。The MLV 5 also has the function of receiving the lockout signal 82 and supplying high pressure oil from another system to the E lower part 3 side to hold emergency oil.

さらに、マスタートリップ電磁弁２（以下ＴＰＶ２とい
う。）に電気トリップ信号Ｓ３が印加されると、図示位
置から第５図左方側に切換作動され、前記非常油供給ラ
イン１０内の圧油がドレンライン１４から排出される。Furthermore, when the electric trip signal S3 is applied to the master trip solenoid valve 2 (hereinafter referred to as TPV2), it is switched from the illustrated position to the left side in FIG. 5, and the pressure oil in the emergency oil supply line 10 is drained. It is discharged from line 14.

これにより、ＥＴＶ３のピストン１１が切換え作動され
、同様に蒸気弁が全開される。As a result, the piston 11 of the ETV3 is switched and the steam valve is similarly fully opened.

このように、非常時にはまず、非常油供給ライン１０内
の油圧が下降され、これに伴って第７図１で表すように
非常油供給ライン１２内の油圧力が次第に低下され、Ｅ
ＴＶ３のピストン１１がトリップ位置（第６図中一点鎖
線位＠）に移動される。ところが、この際、非常油供給
ライン１２と通じる油ボート１５がピストンランド部１
６により一時的にふさがれ、非常油の排出が一時阻止さ
れる。この結果、第７図■に示すように非常油圧の降下
が一時停止され、その分だけタービントリップ時間が遅
れる。蒸気タービンの大官退化に伴ってＥＴＶが大型化
すると、さらにこの傾向は強くなり、タービン過速を機
器の安全範囲に抑制することが困難になる。In this manner, in the event of an emergency, the oil pressure in the emergency oil supply line 10 is first lowered, and as a result, the oil pressure in the emergency oil supply line 12 is gradually lowered as shown in FIG.
The piston 11 of the TV 3 is moved to the trip position (dotted chain line position @ in FIG. 6). However, at this time, the oil boat 15 communicating with the emergency oil supply line 12 was connected to the piston land portion 1.
6, and the discharge of emergency oil is temporarily blocked. As a result, the fall of the emergency oil pressure is temporarily stopped as shown in FIG. 7, and the turbine trip time is delayed by that amount. As ETVs become larger due to the deterioration of steam turbines, this tendency becomes even stronger, and it becomes difficult to suppress turbine overspeed within the safety range of the equipment.

〔発明の目的〕[Purpose of the invention]

そこで本発明は、非常時における非常油圧の降下を迅速
に行うことができる安全性の高い僚友装置を提供するこ
とを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a highly safe companion device that can quickly lower the emergency oil pressure in an emergency.

（発明の実施例） 以下、本発明の実施例を図面に基いて詳細に説明する。(Example of the invention) Embodiments of the present invention will be described in detail below with reference to the drawings.

第５図と同一構成物を同一符号で表した第１図にＪ５い
で、ＥＴＶ３のピストン１１に圧油供給して該ＥＴＶ３
を定常状態に保持する非常油供給ライン１０には、ＴＰ
Ｖ２と油圧リレー弁２０（以下５Ｖ２０という。）が配
置されている。上記ＴＰＶ２は、通常運転時に非常油供
給ライン１０内の圧油を非常油供給ライン２１を通して
ＥＴＶＳ側に送給する位置にセットされるとともに、電
気１−リップ信号Ｓ３が印加されたときには、図示位置
に切換作動され上記非常油供給ライン２１内の圧油がド
レンライン２２に排出されるようになっている。非常油
供給ライン２１は、ＥＴＶ３のシリンダ室内に連通ずる
よう接続され、この非常油供給ライン２１から送給され
る圧油により、ＥＴＶ３のピストン１１が非常油を蒸気
弁駆動部４へ送給するようにセットされるようになって
いる。In FIG. 1, in which the same components as in FIG.
The emergency oil supply line 10 that maintains the
V2 and a hydraulic relay valve 20 (hereinafter referred to as 5V20) are arranged. During normal operation, the TPV2 is set at a position where the pressure oil in the emergency oil supply line 10 is fed to the ETVS side through the emergency oil supply line 21, and when the electric 1-rip signal S3 is applied, the TPV2 is set at the position shown in the figure. The pressure oil in the emergency oil supply line 21 is discharged to the drain line 22. The emergency oil supply line 21 is connected to communicate with the cylinder chamber of the ETV 3, and the pressure oil supplied from the emergency oil supply line 21 causes the piston 11 of the ETV 3 to supply emergency oil to the steam valve drive unit 4. It is set as follows.

また、上記非常油供給ライン２１の途中には、ＥＴＶ３
からＴＰＶ２への圧油の逆流を防ぐ逆止弁Ｃ■が設けら
れるとともに、この非常油供給ライン２１からは、他の
３つの非常油供給ライン２３．２４．２５が分岐されて
いる。このうら非常油供給ライン２５は、上記逆止弁Ｃ
ｖのＦ流側から分岐され、５Ｖ２０の入口ボートに接続
されるとともに、５Ｖ２０の出口ボートにドレンライン
２６が接続されている。さらに、仙の２つの非常油供給
ライン２３．２４は、上記逆止弁Ｃｖの上流側および非
常油供給ライン２５の下流側からそれぞれ分岐され、上
記５Ｖ２０の両端シリンダ室にそれぞれ連通ずるように
対称的に接続されている。これによって、両側からの油
圧力が互いにバランスされるようになっている。さらに
また、この５Ｖ２０のピストン部は、ばね２７により付
勢されており、このばね付勢力によって５Ｖ２０が上記
油圧のバランスに抗して図示位置にセットされるように
なっている。これにより、上記非常油供給ライン２５内
の圧油は、通常ストップされ、ドレンライン２６には流
出しないようになっている。しかし、５Ｖ２０が切換え
られると、非常油がドレンライン２６から排出される。Also, in the middle of the emergency oil supply line 21, there is an ETV3
A check valve C■ is provided to prevent backflow of pressure oil from the TPV 2 to the TPV 2, and three other emergency oil supply lines 23, 24, and 25 are branched from this emergency oil supply line 21. This back emergency oil supply line 25 is connected to the check valve C
It is branched from the F flow side of V and connected to the 5V20 inlet boat, and the drain line 26 is connected to the 5V20 outlet boat. Furthermore, the two emergency oil supply lines 23 and 24 are branched from the upstream side of the check valve Cv and the downstream side of the emergency oil supply line 25, respectively, and are symmetrical so as to communicate with the cylinder chambers at both ends of the 5V 20, respectively. connected. This allows the hydraulic pressure from both sides to be balanced against each other. Furthermore, the piston portion of the 5V20 is biased by a spring 27, and the biasing force of the spring causes the 5V20 to be set at the illustrated position against the above-mentioned oil pressure balance. As a result, the pressure oil in the emergency oil supply line 25 is normally stopped and does not flow into the drain line 26. However, when 5V20 is switched, emergency oil is drained from drain line 26.

このような構成からなる保安装置において、まず、ＭＴ
Ｖｌに油圧トリップ信号Ｓ１が印加されると、このＭＴ
Ｖｌが切換作動され、下流側の非常油供給ライン６がド
レンライン７に接続される。In the security device having such a configuration, first, the MT
When the hydraulic trip signal S1 is applied to Vl, this MT
Vl is switched and the emergency oil supply line 6 on the downstream side is connected to the drain line 7.

これにより、上記非常油供給ライン６内の圧油が逆流し
て排出され、ＭＬＶ５の下流側非常油供給ライン内の圧
油も逆流して非常油供給ライン１０゜非常油供給ライン
２１および非常油供給ライン２３内の油圧が低下する。As a result, the pressure oil in the emergency oil supply line 6 flows backward and is discharged, and the pressure oil in the emergency oil supply line on the downstream side of the MLV5 also flows backward, and the emergency oil supply line 10° emergency oil supply line 21 and the emergency oil The oil pressure in the supply line 23 decreases.

この場合、上記非常油供給ライン２１内の油几降下は、
逆止弁ＣＶの上流側においてのみ行われ、下流側の油圧
力はそのまま確保される。したがつ゛　で、油圧リレー
弁２０を図示右方に押す非常油供給ライン２４内の油圧
力もｈＯの状態を維持される。In this case, the oil tank in the emergency oil supply line 21 drops,
This is performed only on the upstream side of the check valve CV, and the hydraulic pressure on the downstream side is maintained as is. Therefore, the hydraulic pressure in the emergency oil supply line 24 that pushes the hydraulic relay valve 20 to the right in the figure is also maintained at hO.

そして、上述のように、５Ｖ２０を図示左方に押ず非常
油供給ライン２３内の油圧力が時間の経過とともに低下
してくると、５Ｖ２０が切換えられ、非常油供給ライン
２５が５Ｖ２０を介してドレンライン２６に接続される
。これにより、非常油供給ライン２１内の油圧力が急激
に低下していき、ＥＴＶ３のピストン１１を図示左方に
押圧１ｒる油圧力が急減する。したがって上記ＥＴＶ３
が図示位置にセットされ、蒸気弁駆動部４に圧油を供給
する非常油供給ライン１２がドレンライン１３に接続さ
れてタービントリップに至る。Then, as described above, when the 5V20 is pushed to the left in the figure and the hydraulic pressure in the emergency oil supply line 23 decreases over time, the 5V20 is switched and the emergency oil supply line 25 is It is connected to the drain line 26. As a result, the hydraulic pressure in the emergency oil supply line 21 rapidly decreases, and the hydraulic pressure that presses the piston 11 of the ETV 3 to the left in the drawing 1r rapidly decreases. Therefore, the above ETV3
is set to the illustrated position, and the emergency oil supply line 12 that supplies pressure oil to the steam valve drive unit 4 is connected to the drain line 13, leading to a turbine trip.

つぎに、ＴＰＶ２に電気トリップ信号Ｓ３が印加される
と、このＴＰＶ２が図示位置に切換作動され、非常油供
給ライン２１．２３内の油圧力が低下する（非常油供給
ライン２１は逆止弁ＣＶの上流側のみ低下する。、）。Next, when the electric trip signal S3 is applied to the TPV2, the TPV2 is switched to the illustrated position, and the hydraulic pressure in the emergency oil supply line 21.23 is reduced (the emergency oil supply line 21 is connected to the check valve CV decreases only on the upstream side of ).

一方、非常油供給ライン２１の逆止弁Ｃｖより下流側部
分は、油圧力がそのまま保持され、非常油供給ライン２
４の油圧力も同様に維持される。したがって、５Ｖ２０
が図示右方に切換えられ、非常油供給ライン２５がドレ
ンライン２６に接続される。以下、上述の場合と同様に
、ＥＴＶ３が図示位置に切換えられ、タービントリップ
に至る。On the other hand, in the downstream portion of the emergency oil supply line 21 from the check valve Cv, the hydraulic pressure is maintained as it is, and the emergency oil supply line 21
4 hydraulic pressure is similarly maintained. Therefore, 5V20
is switched to the right in the figure, and the emergency oil supply line 25 is connected to the drain line 26. Thereafter, as in the case described above, the ETV 3 is switched to the illustrated position, leading to a turbine trip.

なお、油圧トリップ信号Ｓ１および電気トリップ信号Ｓ
３が同時に印加された場合には、上述した２つの動作が
共に行われ、同様にタービントリップを得る。Note that the hydraulic trip signal S1 and the electric trip signal S
3 are applied at the same time, the two operations described above are performed together, resulting in a turbine trip as well.

このように、５Ｖ２０は、非常油供給ライン２１に設け
られた逆止弁Ｃｖによる油圧力維持様能に基いて迅速に
切換えられ、ＥＴＶ３を切換作動するための油圧降下は
、第２図に示すように急激に行われる。ずなわら、［Ｅ
ＴＶ３の切換用非常油は、線図Ａで示１ように、５Ｖ２
０の迅速な切換動作によつ急激に下降される。したがっ
て、この急激な油圧降下によって油圧干渉に基く休止時
間は線図８に示すように極めて少くなる。すなわら、ト
リップ時間もこれに伴って非常に少くなる。In this way, 5V20 is quickly switched based on the ability to maintain hydraulic pressure by the check valve Cv provided in the emergency oil supply line 21, and the hydraulic pressure drop for switching and operating ETV3 is shown in Fig. 2. It is done so rapidly. Zunawara, [E
The emergency oil for switching TV3 is 5V2 as shown in diagram A.
0 is rapidly lowered by a quick switching action. Therefore, due to this sudden drop in oil pressure, the downtime due to oil pressure interference becomes extremely short as shown in diagram 8. In other words, the trip time is also significantly reduced.

また、第１図と同一構成物を同一符号で表した第３図に
承りように、上記実施例におｔ）る逆止弁Ｃｖの代りに
オリフィス等の絞り装置３０を用いることもできる。Further, as shown in FIG. 3 in which the same components as in FIG. 1 are indicated by the same reference numerals, a throttle device 30 such as an orifice may be used in place of the check valve Cv in t) in the above embodiment.

さらに、第４図に示すように、逆止弁ＣＶと絞り装＠３
０とを並列に設けることもできる。このようにＪれば、
逆止弁Ｃ■がスティック等のトラブルにより、所定の油
圧確保機能が得られない場合にも、絞り装置３０でその
代用を行うことができる。Furthermore, as shown in Fig. 4, the check valve CV and the restrictor @3
0 can also be provided in parallel. If J is like this,
Even if the check valve C2 cannot achieve the desired oil pressure securing function due to a problem such as sticking, the throttle device 30 can be used as a substitute.

〔発明の効果〕〔Effect of the invention〕

以上述べたように、本発明によれば、タービントリップ
に必要な油圧低下を急速かつ確実に行うことかでき、特
にＥＴＶの一時的な油圧干渉を回避覆ることができるた
め、保安装置の信頼性を大きく高めることができる。As described above, according to the present invention, it is possible to quickly and reliably reduce the oil pressure necessary for turbine tripping, and in particular, it is possible to avoid and cover temporary oil pressure interference of the ETV, thereby improving the reliability of the safety device. can be greatly increased.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例における医安装置の系統説明
図、第２図は油圧低下状態を示す縮図、第３図および第
４図は本発明の他の実施例における保安装置の系統説明
図、第５図および第６図は従来の保安装置の系統説明図
、第７図は従来装置における油圧低下状態を示づ一線図
である。 １・・・メカニカルトリップ弁（ＭＴＶ）、２・・・マ
スター１〜リツプ電磁弁（ＴＰＶ）、３・・・マスター
トリップ弁（ＥＴＶ）、４・・−主要蒸気弁駆動部、５
・・・ロックアウト弁（ＭＬＶ）、６，１０．１２゜２
１．２３，２４．２５・・・非常油供給ライン、７゜１
３．２２．２６・・・ドレンライン、２０・・・油圧リ
レー弁、Ｃｖ・・・逆止弁。 出願人代理人　　猪　　股　　　　清 第１図 第２図 第７因 時間 第３０ 第４０ 第５図 第６図FIG. 1 is an explanatory diagram of the system of the medical safety device in one embodiment of the present invention, FIG. 2 is a miniature diagram showing a state of low oil pressure, and FIGS. 3 and 4 are the systems of the safety device in other embodiments of the present invention. The explanatory drawings, FIG. 5 and FIG. 6 are system explanatory diagrams of a conventional safety device, and FIG. 7 is a line diagram showing a state of oil pressure drop in the conventional device. 1... Mechanical trip valve (MTV), 2... Master 1 to lip solenoid valve (TPV), 3... Master trip valve (ETV), 4...-Main steam valve drive section, 5
...Lockout valve (MLV), 6,10.12゜2
1.23, 24.25...Emergency oil supply line, 7゜1
3.22.26... Drain line, 20... Hydraulic relay valve, Cv... Check valve. Applicant's agent Kiyoshi Inomata Figure 1 Figure 2 Figure 7 Factor Time 30th 40th Figure 5 Figure 6

Claims (1)

【特許請求の範囲】 １、非常時にメカニカルトリップ弁あるいはマスタート
リップ電磁弁を切換えてマスタートリップ弁を切換作動
させ、これにより油圧制御を行って蒸気弁を閉塞し、タ
ービントリップを行うようにした蒸気タービンプラント
の保安装置において；上記マスタートリップ弁を定常位
置に保持する圧油の供給ラインに該圧油の逆流を防ぐよ
うに設けられた油圧維持装置と、この油圧維持装置によ
り確保される圧油をそのまま保持しあるいはドレンライ
ンに排出するように切換えられるリレー弁とを備えてな
ることを特徴とする蒸気タービンプラントの保安装置。 ２、油圧維持装置は、逆止弁からなることを特徴とする
特許請求の範囲第１項記載の蒸気タービンプラントの保
安装置。 ３、油圧維持装置は、オリフィスからなることを特徴と
する特許請求の範囲第１項記載の蒸気タービンプラント
の保安装置。 ４、油圧維持装置は、逆止弁とオリフィスとを並列配置
してなることを特徴とする特許請求の範囲第１項記載の
蒸気タービンプラントの保安装置。[Scope of Claims] 1. Steam that switches a mechanical trip valve or a master trip solenoid valve in an emergency to switch and operate the master trip valve, thereby performing hydraulic control to close the steam valve and perform a turbine trip. In a turbine plant safety system: a hydraulic pressure maintenance device installed in a pressure oil supply line that maintains the master trip valve in a steady position to prevent backflow of the pressure oil, and a pressure oil secured by this hydraulic pressure maintenance device. A safety device for a steam turbine plant, comprising a relay valve that can be switched to hold the water as it is or to discharge it to a drain line. 2. The safety device for a steam turbine plant according to claim 1, wherein the oil pressure maintenance device comprises a check valve. 3. The safety device for a steam turbine plant as set forth in claim 1, wherein the hydraulic pressure maintenance device comprises an orifice. 4. The safety device for a steam turbine plant as set forth in claim 1, wherein the oil pressure maintenance device is formed by arranging a check valve and an orifice in parallel.
JP25271284A 1984-11-29 1984-11-29 Security unit in steam turbine plant Pending JPS61132708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25271284A JPS61132708A (en) 1984-11-29 1984-11-29 Security unit in steam turbine plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25271284A JPS61132708A (en) 1984-11-29 1984-11-29 Security unit in steam turbine plant

Publications (1)

Publication Number Publication Date
JPS61132708A true JPS61132708A (en) 1986-06-20

Family

ID=17241197

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25271284A Pending JPS61132708A (en) 1984-11-29 1984-11-29 Security unit in steam turbine plant

Country Status (1)

Country Link
JP (1) JPS61132708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012085934A (en) * 2010-10-22 2012-05-10 Air Water Inc Oxygen concentrator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012085934A (en) * 2010-10-22 2012-05-10 Air Water Inc Oxygen concentrator

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