JPS60237101A - Steam valve monitor - Google Patents
Steam valve monitorInfo
- Publication number
- JPS60237101A JPS60237101A JP9154884A JP9154884A JPS60237101A JP S60237101 A JPS60237101 A JP S60237101A JP 9154884 A JP9154884 A JP 9154884A JP 9154884 A JP9154884 A JP 9154884A JP S60237101 A JPS60237101 A JP S60237101A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- valve
- valve stem
- gap
- 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.)
- Pending
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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
- F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
- F01D17/145—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path by means of valves, e.g. for steam turbines
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、蒸気弁監視装置に係り、特に、弁棒の作動状
態を常時監視しうるようにした蒸気弁監視装置に関する
。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a steam valve monitoring device, and more particularly to a steam valve monitoring device that can constantly monitor the operating state of a valve stem.
一般に、火力発電所等、高温蒸気を使用するプラントで
は蒸気流を制御子るための蒸気弁が多数使用されている
。そしてこれらの蒸気弁は、高温高圧に耐え得るように
クロム、ニッケル系の材質が採用されることが多い。Generally, in plants that use high-temperature steam, such as thermal power plants, many steam valves are used to control steam flow. These steam valves are often made of chromium or nickel-based materials to withstand high temperatures and pressures.
ところが、このようなりロム、ニッケル系の蒸気弁を長
期使用すると酸化スケール（プルーブラッシュ）が弁棒
に付着し１次第に弁棒と弁棒案内体との間隙が小さくな
りていき、ついには弁の開閉が不能になってしまうこと
がある。特に火力発電プラントの場合には、一度運転を
開始すると一年間以上連続運転するのが普通であり、蒸
気弁の固着のおそれが強い。However, when such ROM and nickel-based steam valves are used for a long period of time, oxide scale (blue brush) adheres to the valve stem, and the gap between the valve stem and the valve stem guide gradually becomes smaller, and eventually the valve becomes damaged. It may become impossible to open or close. In particular, in the case of a thermal power plant, once it starts operating, it is common for it to continue operating for more than a year, and there is a strong possibility that the steam valve will become stuck.
従来から毎日蒸気弁の開閉テストをして運転中の弁口ツ
クを防止するようにしていることもあるが、このような
テストでは、弁間隙が極めて小さくガらないと判別が不
能でおり、さらに計測精度も非常に悪い。Traditionally, steam valves have been tested to open and close every day to prevent valve opening during operation, but in such tests, it is impossible to determine if the valve gap is extremely small and does not close. Furthermore, the measurement accuracy is also very poor.
また、弁の固着が起きないように弁棒間隙を大きくする
と、大量の蒸気洩れが生じたり、弁棒保持力が低下して
しまうという欠点があった。Furthermore, if the valve stem gap is increased to prevent the valve from sticking, there are disadvantages in that a large amount of steam leaks and the valve stem retaining force is reduced.
そこで本発明は、このような従来の欠点を解消し、容易
かつ正確に弁棒間隙を計測することができるようにした
蒸気弁監視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 steam valve monitoring device that eliminates such conventional drawbacks and can easily and accurately measure the valve stem clearance.
上記目的を達成するため、本発明による蒸気弁の監視装
置は、弁棒案内部の間隙を通って外部に漏洩する蒸領の
温度圧力信号と蒸気弁の入口、出口側蒸気の温度圧力信
号とに基いて上記弁棒案内部の間隙寸法を演算する弁棒
間隙算出器を備えてなることを特徴とし、蒸気の流動状
態から弁棒間隙を演算するようにしている。In order to achieve the above object, the steam valve monitoring device according to the present invention detects the temperature and pressure signals of the steam leaking to the outside through the gap in the valve stem guide and the temperature and pressure signals of the steam on the inlet and outlet sides of the steam valve. The present invention is characterized by comprising a valve stem gap calculator that calculates the gap size of the valve stem guide portion based on the above, and calculates the valve stem gap from the flow state of steam.
以下、本）発明の実施例を図面に基いて詳細に説明する
。Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は、再熱形火力発電プラントを表しており、ボイ
ラｌから発生した主蒸気がまず高圧タービンユに回転仕
事を与えた後、再熱されて中圧タービン３および低圧タ
ービンを内で膨張し、復水器ＳＶＣ導かれて凝縮する。Figure 1 shows a reheat-type thermal power plant, in which main steam generated from boiler 1 first gives rotational work to high-pressure turbine 1, and then is reheated and expanded inside intermediate-pressure turbine 3 and low-pressure turbine. Then, it is led to the condenser SVC and condensed.
そしてタービン回転仕事は発電機６で電力に変換される
。このような発電プラントのうち本実施例は特に再熱蒸
気管路りに設けられた再熱蒸気止め弁Ｓに本発明を適用
したものである。The turbine rotational work is then converted into electric power by the generator 6. In this embodiment, the present invention is particularly applied to a reheat steam stop valve S provided in a reheat steam pipeline in such a power generation plant.
第２図は、再熱蒸気止弁ｇを表したものであって、弁胴
９は、蒸気人口部ｌＯと蒸気出口部ｌ／とを有し、この
蒸気人口部１０と蒸気出口部／／とを結ぶ蒸気通路内に
弁座／コが配置されており、該弁座１２を弁体１３によ
り開放、閉鎖するようにしている。FIG. 2 shows a reheat steam stop valve g, in which the valve body 9 has a steam intake section 10 and a steam outlet section l//. A valve seat 12 is disposed in the steam passage connecting the two, and the valve seat 12 is opened and closed by a valve body 13.
上記弁体１３を作動させる弁棒／ダは、弁棒案内部／り
により保持されるとともに、力、シリング／ｌ−を介し
て油筒１７のピストンロッド／ｇに連結されている。The valve rod for actuating the valve body 13 is held by a valve rod guide and connected to the piston rod of the oil cylinder 17 via a force.
そして、油筒１７への油圧制御によって弁の開放。Then, the valve is opened by hydraulic control to the oil cylinder 17.
閉鎖が行われるようになっている。A closure is coming.
弁棒案内部／Ｓの内径りは弁棒／ダの外径ｄよりやや大
きく形成されてお９、弁棒／ダをスムーズに動かすこと
ができるようにしている。この結果、弁棒案内部ｌＳと
弁棒ｌｔとの間に所定の弁棒の間隙１９（間隙寸法Ｄ−
ａ）が生じ、運転中に所定量の蒸気がとの弁棒間隙／ｑ
を通って外部に漏洩しようとする。なお、第一図は全開
状態を表しているが、この場合には、弁棒／ダの途中に
設けられたシール斜面部／９３が弁棒案内部／左側に形
成されたシート部／３ａに密着して蒸気漏れは完全に防
止されるようになっている。The inner diameter of the valve stem guide part S is formed to be slightly larger than the outer diameter d of the valve stem 9, so that the valve stem can be moved smoothly. As a result, a predetermined valve rod gap 19 (gap dimension D-
a) occurs and a predetermined amount of steam is released during operation with the valve stem clearance/q
attempt to leak to the outside through the Note that Figure 1 shows the fully open state, but in this case, the seal slope part /93 provided in the middle of the valve stem /da is attached to the seat part /3a formed on the left side of the valve stem guide part. They fit tightly together to completely prevent steam leakage.
さらに上記弁棒間隙／９の外方開口部分（第７図下方部
分）には、該弁棒間隙／９からの漏れ蒸気の圧力を検出
する圧力検出孔、２１は管台２コを介して外部まで貫通
するように設けられており、圧力検出装＠、２３の配管
が連結されている。Furthermore, a pressure detection hole 21 for detecting the pressure of leaking steam from the valve stem gap/9 (lower part in FIG. 7) of the valve stem gap/9 is provided through two nozzles. It is provided so as to penetrate to the outside, and the piping of the pressure detection device @, 23 is connected to it.
圧力検出装置２３の主配管路２’ｌは、上述のように圧
力検出孔２／から延出してオリフィスＪおよび蒸気逃し
弁ｎを通って排気受２７に開口されている。As described above, the main piping line 2'l of the pressure detection device 23 extends from the pressure detection hole 2/, passes through the orifice J and the steam relief valve n, and opens into the exhaust receiver 27.
さらに、上記オリフィス８の流入側には漏れ蒸気圧力検
出器、２Ｉｒが設けられており、漏れ蒸気の圧力が検出
されるようになっている。Further, a leakage steam pressure detector 2Ir is provided on the inflow side of the orifice 8 to detect the pressure of leakage steam.
また、上記オリフィスＪの出口側からの分岐管路、２９
には止め弁３／（ｉ？介して蒸気へラダ３コが接続され
ている。この蒸気ヘッダ３２内にはシール蒸気が常時蓄
えられており、起動前に止め弁３１を開けておき、シー
ル蒸気を弁棒間隙１９内に送給して系統内に外部から空
気が流入しないようにしている。In addition, a branch pipe line from the outlet side of the orifice J, 29
3 ladders are connected to the steam through a stop valve 3/(i?). Seal steam is always stored in this steam header 32, and the stop valve 31 is opened before starting, and the seal steam is Steam is fed into the valve stem gap 19 to prevent air from entering the system from outside.
なお、運転中には上記止め弁３／は全閉されるようにな
っている。Note that the stop valve 3/ is completely closed during operation.
さらにまた、上記再熱蒸気管路めＳの前後には、それぞ
れ弁部温度検出器３Ｓ、弁前圧力検出器３６および弁径
圧力検出器３７が設けられており、各検出器、？ｊ 、
、ｕ 、 、７７から神前温度信号Ｓ１、弁部圧力信
号Ｓ２および弁径圧力信号Ｓ３が弁棒間隙算出器３ｇに
発せられるようになっている。また、前述した漏れ蒸気
圧力検出器２ｇからは再熱蒸気止め弁ｇの弁棒間隙／９
から漏出する蒸気の圧力値が漏れ蒸気圧力信号Ｓ４とし
て上記弁棒間隙算出器３ｇに出力されるようになってい
る。さらに、上記再熱蒸気止め弁ｇＫＡま全閉状態を検
出する弁全閉検出リミットスイッチ３ワが付設されてお
り、再熱蒸気止め弁ｇが全閉したときに全閉信号Ｓ５が
弁棒間隙算出器３ｇに発せられるようになっている。Furthermore, a valve temperature detector 3S, a valve front pressure detector 36, and a valve diameter pressure detector 37 are provided before and after the reheat steam pipe S, respectively. j,
, u , , , 77, a valve temperature signal S1, a valve portion pressure signal S2, and a valve diameter pressure signal S3 are outputted to the valve stem gap calculator 3g. In addition, from the leakage steam pressure detector 2g mentioned above, the valve stem gap/9 of the reheat steam stop valve g
The pressure value of the steam leaking from the valve is outputted as a leakage steam pressure signal S4 to the valve stem gap calculator 3g. Furthermore, a valve fully closed detection limit switch 3W is attached to detect the fully closed state of the reheat steam stop valve gKA, and when the reheat steam stop valve g is fully closed, a fully closed signal S5 is output from the valve stem gap. It is designed to be emitted to calculator 3g.
第３図は、上記弁棒間隙算出器３ｇの回路を説明したも
のである。FIG. 3 illustrates the circuit of the valve stem gap calculator 3g.
まず、上記漏れ蒸気信号Ｓ４および丹前温度信号Ｓ１は
信号変換器ｌＩｏを介して流量計算回路ケ／に入力され
、この流量計算回路ｔｌ／において算出された漏れ蒸気
流量りは、信号Ｓ６として弁棒間隙逆算回路な−に出力
される。First, the leakage steam signal S4 and the tanzen temperature signal S1 are input to the flow rate calculation circuit tl/ via the signal converter lIo, and the leakage steam flow rate calculated in this flow rate calculation circuit tl/ is sent as the signal S6 to the flow rate calculation circuit tl/. It is output to the bar gap inversion circuit.
また、上記弁棒間隙逆算回路弘コには、弁部圧力信号Ｓ
２が信号変換器ｔＩ０を通して印加されている。In addition, the valve stem clearance inversion circuit Hiroko also includes a valve pressure signal S.
2 is applied through signal converter tI0.
さらに、上記丹前温度信号Ｓ１および弁部圧力信号Ｓ２
にはエンタルピ計算回路ｑにも出力され、このエンタル
ピ計算回路ダ３にて算出されたエンタルピ１が信号Ｓ７
として上記弁棒間隙逆算回路ケ２に印加されるようにな
っている。Furthermore, the Tangen temperature signal S1 and the valve pressure signal S2
is also output to the enthalpy calculation circuit q, and the enthalpy 1 calculated by the enthalpy calculation circuit DA3 is outputted to the signal S7.
is applied to the valve stem gap inversion calculation circuit 2.
弁棒間隙逆算回路４（，２では、
Ｇ−ｘ（ｔ）・ｐｏ・（Ｄ−ａ）／ｓ −・−−−−−
−（１）に基いて弁棒間隙（Ｄ −４）が逆算される。Valve stem gap back calculation circuit 4 (, 2, G-x(t)・po・(D-a)/s −・−−−−
- The valve stem clearance (D-4) is calculated backwards based on (1).
ここで、 Ｇ：漏れ蒸気流量 Ｐｏ：邦画蒸気圧力 Ｓ：シール長さ Ｋ（ｉ） ：弁部蒸気エンタルピ ｍ、ｎ：定数 である。here, G: Leakage steam flow rate Po: Japanese movie steam pressure S: Seal length K(i): Valve steam enthalpy m, n: constant It is.
この場合、第９図に示すように、上記シール長さＳは全
閉状態時の弁棒間隙ｌりを形成する長さである。In this case, as shown in FIG. 9, the seal length S is a length that forms a gap between the valve stems in the fully closed state.
なお、第Ｓ図および第６図に示すように、漏れ蒸気流量
Ｇ（縦軸）は、シール長−ｇｓおよび弁棒間隙（Ｄ−ａ
）（横軸）にそれぞれ反比例および比例することから、
（） ＱＣＰ ６・（Ｄ−＋１）／ｓ ・・・・・・・
・・・・・・・・・・・（２）なる関係が導かれ、上記
（１）式はこの−）式に基いて得られたものである。As shown in Figures S and 6, the leakage steam flow rate G (vertical axis) is determined by the seal length - gs and the valve stem gap (D - a
) (horizontal axis), so () QCP 6・(D-+1)/s ・・・・・・・・・
The following relationship (2) was derived, and the above equation (1) was obtained based on this -) equation.
そして、上記弁棒間隙逆算回路値でめられた弁棒間隙（
Ｄ−＋１）は、信号Ｓ８として判断回路偶に出力される
。判断回路ｐｐには、全閉検出リミットスイッチ３９か
らの全閉信号Ｓ５および弁径圧力検出器３りからの弁径
圧力信号Ｓ３が入力され、弁が全閉していないことを確
め、さらに弁径圧力による修正が加えられた後に、表示
回路１５に弁棒間隙（Ｄ−（１）が表示される。Then, the valve stem gap (
D-+1) is output to the judgment circuit as a signal S8. The determination circuit pp receives the fully closed signal S5 from the fully closed detection limit switch 39 and the valve diameter pressure signal S3 from the valve diameter pressure detector 3, confirms that the valve is not fully closed, and further After the correction based on the valve diameter pressure is applied, the valve stem clearance (D-(1)) is displayed on the display circuit 15.
そして、この弁棒間隙（Ｄ−（１）は比較回路侘にて基
準値ダ７と比較され、危険値を越えたときに警報回路ｒ
ｉｇから警報が発せられるようになっているう
なお、本発明は、他の種々の蒸気弁にも適用しうろこと
はもちろんである。Then, this valve stem clearance (D-(1)) is compared with a reference value DA7 in a comparator circuit, and when it exceeds a dangerous value, an alarm circuit r
Of course, the present invention can also be applied to various other steam valves, although the alarm is issued from the IG.
以上述べたように、本発明による蒸気弁監視装置は、蒸
気弁の弁棒案内部の間隙を通って外部に漏洩する蒸気の
温度圧力信号と、蒸気弁の入口。As described above, the steam valve monitoring device according to the present invention detects the temperature and pressure signals of steam leaking to the outside through the gap in the valve stem guide of the steam valve, and the inlet of the steam valve.
出口側蒸気の温度圧力信号とに基いて弁棒案内部の間隙
寸法を演算する弁棒間隙算出器を備えるようにしたから
、蒸気の状態量を計測するのみで蒸気弁の弁棒間隙を直
ちに検知することができ、蒸気弁の安定作動を極めて良
好に実現することができる。Since it is equipped with a valve stem gap calculator that calculates the gap size of the valve stem guide based on the temperature and pressure signal of the steam on the outlet side, it is possible to immediately calculate the valve stem gap of the steam valve just by measuring the state quantity of steam. This can be detected and the stable operation of the steam valve can be achieved extremely well.
第７図は本発明を適用した火力発電プラントの系統説明
図、第一図は本発明の一実施例における再熱蒸気止め弁
の縦断面図、第３図は弁棒間隙算出器の回路説明図、第
９図は蒸気弁の全閉状態を表す縦断面図、第３図および
第６図は漏れ蒸気量とシール長さおよび弁棒間隙との関
係を表した線図である。
ｇ・・再熱蒸気止め弁、／Ｑ・・・弁棒、／Ｓ・・・弁
棒案内部、２／・・・圧力検出孔、コＪ・・・圧力検出
装置、Ｊ・・・オリフィス１．２６・・・蒸気逃し弁、
２ｇ・・・漏れ蒸気圧ノ１（小出器、３コ・・・蒸気ヘ
ッダ、３３・・・弁部温度検出器 ？る・・・弁部圧力
検出器、３７・・・弁径圧力検出器、ぎ ：１゛棒間隙
算出器、グト・・流量計算回路、グー・・・弁棒間隙逆
算回路、ダ３・・・エンタルピ計算回路。
出願人代理人 猪 股 消
ｉ正４５
第２図
第３図Fig. 7 is a system explanatory diagram of a thermal power plant to which the present invention is applied, Fig. 1 is a longitudinal cross-sectional view of a reheat steam stop valve in an embodiment of the present invention, and Fig. 3 is a circuit explanation of a valve stem gap calculator. 9 are longitudinal sectional views showing the fully closed state of the steam valve, and FIGS. 3 and 6 are diagrams showing the relationship between the amount of leaked steam, the seal length, and the valve stem gap. g...Reheat steam stop valve, /Q...valve stem, /S...valve stem guide, 2/...pressure detection hole, J...pressure detection device, J...orifice 1.26...Steam relief valve,
2g...Leak steam pressure No. 1 (dispenser, 3 pieces...Steam header, 33...Valve temperature detector?ru...Valve pressure detector, 37...Valve diameter pressure detection Applicant, gi: 1゛ rod gap calculator, Guto...flow rate calculation circuit, Goo...valve stem gap inverse calculation circuit, Da3...enthalpy calculation circuit. Applicant's attorney Inomata Isei 45 Figure 2 Figure 3
Claims (1)
蒸気の温度圧力信号と該蒸気弁の入口および出口側蒸気
の温度圧力信号とに基いて上記弁棒案内部の間隙寸法を
演算する弁棒間隙算出器を備えてなることを特徴とする
蒸気弁監視装置０ ２）弁棒間隙算出器は、弁棒間隙からの漏出蒸気の温度
圧力信号に基いて漏出蒸気流量を算出する流量計算回路
と、弁出口側蒸気の温度圧力信号忙基いてエンタルピを
算出するエンタルピ計算回路と、弁入口側蒸気圧力信号
と上記流量計算回路、エンタルピ計算回路からそれぞれ
発せられる漏れ蒸気流量信号、弁入口側蒸気エンタルピ
信号とに基いて弁棒間隙を算出する弁棒間隙逆算回路と
を備えていることを特徴とする特許請求の範囲第１項記
載の蒸気弁監視装置。[Scope of Claims] l) Based on the temperature and pressure signals of the steam leaking to the outside through the gap in the valve stem guide of the steam valve and the temperature and pressure signals of the steam on the inlet and outlet sides of the steam valve, Steam valve monitoring device 0 characterized in that it is equipped with a valve stem gap calculator that calculates the gap size of the guide part. 2) The valve stem gap calculator is based on the temperature and pressure signal of leaking steam from the valve stem gap. A flow rate calculation circuit that calculates the leaked steam flow rate, an enthalpy calculation circuit that calculates enthalpy based on the temperature and pressure signal of the steam on the valve outlet side, and a steam pressure signal on the valve inlet side and the above flow rate calculation circuit and enthalpy calculation circuit respectively. 2. The steam valve monitoring device according to claim 1, further comprising a valve stem gap back calculation circuit that calculates the valve stem gap based on the leakage steam flow rate signal and the valve inlet side steam enthalpy signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9154884A JPS60237101A (en) | 1984-05-08 | 1984-05-08 | Steam valve monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9154884A JPS60237101A (en) | 1984-05-08 | 1984-05-08 | Steam valve monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60237101A true JPS60237101A (en) | 1985-11-26 |
Family
ID=14029538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9154884A Pending JPS60237101A (en) | 1984-05-08 | 1984-05-08 | Steam valve monitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60237101A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106103910A (en) * | 2014-03-13 | 2016-11-09 | 西门子公司 | There is the apparatus of steam power plants of valve stem leakoff pipeline |
| WO2023149088A1 (en) * | 2022-02-01 | 2023-08-10 | 三菱重工業株式会社 | Steam valve and power generation system |
-
1984
- 1984-05-08 JP JP9154884A patent/JPS60237101A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106103910A (en) * | 2014-03-13 | 2016-11-09 | 西门子公司 | There is the apparatus of steam power plants of valve stem leakoff pipeline |
| JP2017519140A (en) * | 2014-03-13 | 2017-07-13 | シーメンス アクティエンゲゼルシャフト | Steam power equipment with valve shaft leakage steam piping |
| US10337356B2 (en) | 2014-03-13 | 2019-07-02 | Siemens Aktiengesellschaft | Steam power installation comprising valve-stem leakage steam line |
| WO2023149088A1 (en) * | 2022-02-01 | 2023-08-10 | 三菱重工業株式会社 | Steam valve and power generation system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6352001B1 (en) | Non-iterative method for obtaining mass flow rate | |
| US5046519A (en) | Method and apparatus for monitoring a fluid conduit system | |
| NO20055161L (en) | Method and apparatus for directly detecting leakage in node shut-off valves or other valves | |
| US8113764B2 (en) | Steam turbine and a method of determining leakage within a steam turbine | |
| US4651559A (en) | Method and apparatus for detecting leaks in a gas pipe line | |
| GB2289543A (en) | Flowmeter | |
| KR890013471A (en) | Flow Meter Control of Air Leak Monitor | |
| JPS60237101A (en) | Steam valve monitor | |
| KR101403347B1 (en) | Apparatus of steam generator tube plugging analysis using pressure drop and heat-transfer performance | |
| JP3295235B2 (en) | Method for judging gas leakage from inner tube using fluidic gas meter with flow sensor | |
| CN114593366B (en) | Monitoring system and monitoring method for hydrogen leakage of hydrogen station | |
| JP3295236B2 (en) | Method for judging gas leakage from inner tube using fluidic gas meter with flow sensor | |
| JP3358787B2 (en) | Gas leak detecting device and gas leak detecting method used for the same | |
| US5313830A (en) | Assessment of air ingress to steam systems | |
| CN208635142U (en) | A kind of cold and hot calibrating matching measurement device with online high temperature resistant function | |
| JP2765456B2 (en) | Pipeline leak detection method | |
| RU2270986C2 (en) | Method for measuring amount of gas (flow-over), flowing through closed ball valve, and device for realization of said method | |
| JP3117844B2 (en) | Gas leak detection method | |
| JP3231952B2 (en) | Apparatus for inspecting gas leakage from lamp inner tube | |
| JP3267808B2 (en) | Gas conduit leak inspection device and gas meter incorporating this device | |
| SU690312A1 (en) | Pipe-piston flow-metering apparatus | |
| JPS5913176A (en) | Supervisory device for valve action | |
| JPS62213695A (en) | Detecting device for leakage of cooling water | |
| JPH03265911A (en) | Pressure reducing valve containing steam dryness measuring function | |
| SU840675A1 (en) | Method of monitoring clearance condition steam turbine end sealings |