JPH04131577A - Valve monitor - Google Patents
Valve monitorInfo
- Publication number
- JPH04131577A JPH04131577A JP24716690A JP24716690A JPH04131577A JP H04131577 A JPH04131577 A JP H04131577A JP 24716690 A JP24716690 A JP 24716690A JP 24716690 A JP24716690 A JP 24716690A JP H04131577 A JPH04131577 A JP H04131577A
- Authority
- JP
- Japan
- Prior art keywords
- resistance value
- insulation resistance
- leak
- gland
- stem
- 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
- 210000004907 gland Anatomy 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims abstract description 23
- 238000012856 packing Methods 0.000 claims abstract description 19
- 238000012806 monitoring device Methods 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 description 6
- 238000011109 contamination Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は弁のグランドパッキングを常時監視することに
より、弁のリーク発生を予知することができる弁監視装
置に係る。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a valve monitoring device that can predict the occurrence of a leak in a valve by constantly monitoring the gland packing of the valve.
（従来の技術）
例えば原子力発電所等においては非常に多くの弁が使用
されている。而して、それ等の弁は極めて苛酷な条件に
曝されているため、故障を生じることが多い。特に、弁
のステムと弁筐との間に設けられたグランド部の故障は
最も起り易い故障の一つである。グランド部はグランド
パッキングの摩耗、劣化、傷、緩み、ステムの摩耗、異
物の混入等の種々の原因によりリークを生じるものであ
る。原子力発電所等の保守上、上記のような弁のリーク
発生の予知またはその検出は重要な課題である。(Prior Art) For example, a large number of valves are used in nuclear power plants and the like. Since these valves are exposed to extremely harsh conditions, they often fail. In particular, failure of the gland section provided between the valve stem and the valve housing is one of the most likely failures. Leakage occurs in the gland section due to various causes such as abrasion, deterioration, flaws, loosening of the gland packing, abrasion of the stem, and contamination of foreign matter. For the maintenance of nuclear power plants and the like, predicting or detecting the occurrence of valve leaks as described above is an important issue.
従来、上記の弁グランド部のＩノーりの予知または検出
すなわちグランド部の診断は、目視点検によるかリーク
発生による温度上昇を温度センサで検知するかの何れか
によっていた。Conventionally, the above-mentioned prediction or detection of the above-mentioned I leakage in the valve gland section, that is, diagnosis of the gland section, has been carried out either by visual inspection or by detecting a temperature rise due to leakage using a temperature sensor.
（発明が解決しようとする課題）
ところが、上記の何れの手段によっても１回の点検によ
って診断し得る弁の数は限られており、−挙に多数の弁
の診断を行うことは極めて国憲である。また、目視によ
る点検は不確実でありその上作業員の負担も大である。(Problem to be Solved by the Invention) However, the number of valves that can be diagnosed in one inspection by any of the above methods is limited, and it is extremely against the national constitution to diagnose a large number of valves at once. be. In addition, visual inspection is uncertain and also places a heavy burden on the workers.
さらに、リークによる温度上昇を基準とする診断にあっ
ても、リーク発生時に即座にこれを検知することは困難
である。Furthermore, even in a diagnosis based on a temperature rise due to a leak, it is difficult to immediately detect a leak when it occurs.
ましてリーク発生前の兆候の段階でリーク発生を予知す
ることは不可能であり、定期点検に役立てることはでき
ない。Furthermore, it is impossible to predict the occurrence of a leak at the stage where there are signs before a leak occurs, and it cannot be used for periodic inspections.
本発明は上記の事情に基づきなされたもので、同時に多
数の弁のグランド部を監視し、それ等の弁におけるリー
クの発生前においてこれを予知することができる弁監視
装置を提供することを目的としている。The present invention was made based on the above-mentioned circumstances, and an object of the present invention is to provide a valve monitoring device that can simultaneously monitor the gland portions of a large number of valves and predict leaks in those valves before they occur. It is said that
［発明の構成］
（課屈を解決するための手段）
本発明の弁監視装置は、弁筐のステム貫通部に装着した
グランドパッキングの絶縁抵抗値Ｚを常時監視し、グラ
ンド部からのリークを発生するグランドパッキングの絶
縁抵抗値Ｚ０よりも大きな絶縁抵抗値Ｚ□、 Ｚ２（Ｚ
、＞２２）として、ｚ１≧Ｚ ＞ Ｚ ｚにおいて注意
報を、Ｚ≦２２において警報をそれぞれ発生させるよう
にしたことを特徴とする。[Structure of the Invention] (Means for Solving Imposition) The valve monitoring device of the present invention constantly monitors the insulation resistance value Z of the gland packing attached to the stem penetrating portion of the valve casing, and prevents leakage from the gland portion. Insulation resistance values Z□, Z2 (Z
, >22), a warning is generated when z1≧Z>Z z, and an alarm is generated when Z≦22.
（作用）
上記構成の本発明の弁監視装置においては、グランドパ
ッキングの摩耗、劣化、傷、緩み、ステムの摩耗、異物
の混入等により弁筐側からステム貫通部に対して侵入し
た水または蒸気等により低下するグランドパッキングの
絶縁抵抗値２を常時監視し、Ｚ□≧Ｚ＞２２で注意報を
、またＺ≦２２で警報をそれぞれ発生するようにしであ
るから、弁のリークを早期において予知することができ
る。(Function) In the valve monitoring device of the present invention having the above configuration, water or steam that has entered the stem penetrating portion from the valve casing side due to wear, deterioration, scratches, loosening of the gland packing, wear of the stem, contamination of foreign matter, etc. The insulation resistance value 2 of the gland packing, which decreases due to factors such as can do.
（実施例）
第１図は本発明一実施例の縦断面図、第２図はその要部
の斜視図、第３図は前記実施例の理論的根拠を説明する
ためのグラフである。第１図において、弁筐１のステム
貫通部１ａには弁のステム２が貫通されており、前記ス
テム貫通部１ａには前記ステム２を同心的に包囲し、前
記ステム２外周面および前記ステム貫通部１ａ内周面に
密接する環状のバッキングを積層してなるグランドパッ
キング３が配置されている。なお、グランドパッキング
最下面とステム貫通部１ａ底面との間にはステム２およ
び前記底面とは電気的番こ非接触のリング状の端子４が
介在され、前記グランドパッキング３の最上面にはグラ
ンドフランジ５の筒状部５ａ下端が同じくステム２およ
び前記筒状部下端とは電気的に非接触のリング状の端子
６を介して当接されている。なお１図示の簡略化のため
上記各端子４．６は単に環板状として示しであるが、端
子４の前記底面に当接される面および端子６の前記筒状
部５ａ下端に当接される面には、絶縁被覆を施すかまた
はそれ等の面と当接の相手方との間には絶縁板を介在さ
せである。而して、前記グランドフランジ５と前記ステ
ム貫通部１ａ上端の弁筐フランジ１ｂとは、グランドボ
ルト７によって結合され、グランドボルト７の調節によ
って前記グランドパッキング３に適切な締付力を加え、
所要のシール作用を得るようにされている。(Embodiment) FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of the main part thereof, and FIG. 3 is a graph for explaining the theoretical basis of the embodiment. In FIG. 1, a stem 2 of the valve is passed through a stem penetration portion 1a of a valve housing 1, and the stem 2 is concentrically surrounded by the stem penetration portion 1a, and the outer peripheral surface of the stem 2 and the stem 2 are surrounded by the stem penetration portion 1a. A ground packing 3 formed by laminating annular backings in close contact with the inner circumferential surface of the penetrating portion 1a is arranged. Note that a ring-shaped terminal 4 is interposed between the lowest surface of the ground packing and the bottom surface of the stem penetrating portion 1a and has no electrical contact with the stem 2 and the bottom surface, and a ground terminal is provided on the top surface of the ground packing 3. The lower end of the cylindrical portion 5a of the flange 5 is also in contact with the stem 2 and the lower end of the cylindrical portion via a ring-shaped terminal 6 which is not in electrical contact. Note that each of the terminals 4.6 is simply shown as an annular plate for simplicity of illustration; An insulating coating may be applied to the surfaces to be used, or an insulating plate may be interposed between the surfaces and the other side. The gland flange 5 and the valve housing flange 1b at the upper end of the stem penetrating portion 1a are connected by a gland bolt 7, and an appropriate tightening force is applied to the gland packing 3 by adjusting the gland bolt 7.
It is designed to provide the required sealing action.
さらに、前記各端子４，６には導線８．９により電源装
置１０の出力端子がそれぞれ接続され、電源装置１ｏに
は絶縁抵抗検出器１１が布設されている。また、絶縁抵
抗検出器１１の出力は後記説明する演算器１２に入力さ
れ、演算器１２の出力は同じく後記説明する警報発生器
１３および表示器１４に与えられる。Further, the output terminals of a power supply device 10 are connected to each of the terminals 4 and 6 through conducting wires 8.9, and an insulation resistance detector 11 is installed in the power supply device 1o. Further, the output of the insulation resistance detector 11 is input to a computing unit 12, which will be explained later, and the output of the computing unit 12 is given to an alarm generator 13 and a display 14, which will also be explained later.
グランド部のリークはグランドパッキングの摩耗、劣化
、傷、緩み、ステムの摩耗、異物の混入等の種々の原因
により生じることは前記した通りであるが２それ等の原
因が発生または進行している場合には、弁筐１側からス
テム貫通部１ａに対して水または蒸気等が侵入して行く
。この侵入した水または蒸気はグランドパッキング３に
しみ込み、その絶縁抵抗値を低下させる。第３図は前記
水または蒸気の侵入開始後の経過時間と絶縁抵抗値との
関係を示している。この図において、絶縁抵抗値は時間
経過とともに低下して行き、絶縁抵抗値Ｚ０においてリ
ークを生じることが示されている。前記絶縁抵抗値Ｚ。As mentioned above, leaks in the gland can be caused by various causes such as wear, deterioration, scratches, loosening of the gland packing, wear of the stem, and contamination of foreign matter. In this case, water, steam, etc. enter the stem penetrating portion 1a from the valve housing 1 side. This intruding water or steam permeates into the gland packing 3 and reduces its insulation resistance value. FIG. 3 shows the relationship between the elapsed time after the entry of water or steam started and the insulation resistance value. This figure shows that the insulation resistance value decreases over time, and leakage occurs at the insulation resistance value Z0. The insulation resistance value Z.
より大きい絶縁抵抗値ｚ１．２２（但Ｌ Ｚ、＞ ２２
）を演算器１２に設定する。演算器１２は絶縁抵抗検出
器１１により与えられた入力Ｚが
Ｚ１≧２＞２２・・・・・・・・・・・・■であれば注
意報を、また前記２が
Ｚ≦Ｚ２・・・・・・・・・・・・・・・・・・■であ
れば警報をそれぞれ発生するようにしである。Larger insulation resistance value z1.22 (However, L Z, > 22
) is set in the arithmetic unit 12. The calculator 12 issues a warning if the input Z given by the insulation resistance detector 11 is Z1≧2>22...■, and if the above 2 is Z≦Z2...・・・・・・・・・・・・・・・・・・■ If it is, an alarm will be generated respectively.
なお、警報発生器１３は色を異ならしめた１対の発光ダ
イオード（ＬＥＤ）を診断対象である各弁毎に設けるも
のとしてあり、例えば前記■の場合においては黄色のＬ
ＥＤを、前記■の場合においては赤色のＬＥＤをそれぞ
れ発光させるようにしておく。The alarm generator 13 is provided with a pair of light emitting diodes (LEDs) of different colors for each valve to be diagnosed.For example, in the case of
In the case of (2) above, the ED is set so that each of the red LEDs emits light.
また、演算器１２は前記入力２を処理して表示器１４に
出力し、絶縁抵抗値の時間経過に伴う変化をグラフとし
て表示させる。Further, the arithmetic unit 12 processes the input 2 and outputs it to the display 14 to display the change in the insulation resistance value over time as a graph.
上記構成の本発明の弁監視装置によれば、多数の弁のグ
ランド部を常時監視し、そのリークの原因であるグラン
ドパッキングの摩耗、劣化、傷、緩み、ステムの摩耗、
異物の混入等の種々の原因の発生またはその進行を多数
の弁につき知ることができる。According to the valve monitoring device of the present invention having the above configuration, the gland portions of a large number of valves are constantly monitored, and the gland packing causes wear, deterioration, scratches, loosening, stem wear, etc., which are the causes of leaks.
The occurrence or progress of various causes such as foreign matter contamination can be detected for a large number of valves.
［発明の効果］
上記から明らかなように本発明の弁監視装置においては
、グランドパッキングの絶縁抵抗値を常時監視すること
により、グランド部からのリークを予知することができ
るから、例えば原子力発電所等の苛酷な条件下で多数の
弁を使用するプラントの安全性、その稼働率等を著しく
向上させることができる。[Effects of the Invention] As is clear from the above, in the valve monitoring device of the present invention, leakage from the gland can be predicted by constantly monitoring the insulation resistance value of the gland packing. It is possible to significantly improve the safety and operation rate of plants that use a large number of valves under such severe conditions.
第１図は本発明一実施例の縦断面図、第２図はその要部
の斜視図、第３図は前記実施例の理論的根拠を説明する
ためのグラフである。
１・・・・・・弁筐 １ａ・・・・・・ステム貫通部
１ｂ弁筐フランジ ２・・・・ステム ３・・・・・・
グランドパッキング ４．６・・・・・・端子 ５・・
・・・・グランドフランジ ５ａ・・・・筒状部 ７・
・・・・・グランドボルト８．９・・・・・・導線 １
０・・・・・・電源装置 １１・・・・・絶縁抵抗検出
器 １２・・・・・演算器 １３・・・・・・警報発生
器 １４・・・・・・表示器FIG. 1 is a longitudinal cross-sectional view of an embodiment of the present invention, FIG. 2 is a perspective view of its essential parts, and FIG. 3 is a graph for explaining the theoretical basis of the embodiment. 1... Valve housing 1a... Stem penetration part
1b Valve housing flange 2... Stem 3...
Ground packing 4.6...Terminal 5...
...Ground flange 5a...Cylindrical part 7.
...Ground bolt 8.9...Conductor wire 1
0...Power supply device 11...Insulation resistance detector 12...Calculator 13...Alarm generator 14...Display device
Claims (1)
絶縁抵抗値Ｚを常時監視し、グランド部からのリークを
発生するグランドパッキングの絶縁抵抗値Ｚ＿０よりも
大きな絶縁抵抗値Ｚ＿１、Ｚ＿２（Ｚ＿１＞Ｚ＿２）と
して、Ｚ＿１≧Ｚ＞Ｚ＿２において注意報を、Ｚ≦Ｚ＿
２において警報をそれぞれ発生させるようにしたことを
特徴とする弁監視装置。The insulation resistance value Z of the gland packing attached to the stem penetration part of the valve case is constantly monitored, and the insulation resistance values Z_1 and Z_2 (Z_1>Z_2) are larger than the insulation resistance value Z_0 of the gland packing that causes leakage from the ground part. As, Z_1≧Z>Z_2, a warning is issued, Z≦Z_
2. A valve monitoring device characterized in that alarms are generated respectively in step 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24716690A JPH04131577A (en) | 1990-09-19 | 1990-09-19 | Valve monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24716690A JPH04131577A (en) | 1990-09-19 | 1990-09-19 | Valve monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04131577A true JPH04131577A (en) | 1992-05-06 |
Family
ID=17159421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24716690A Pending JPH04131577A (en) | 1990-09-19 | 1990-09-19 | Valve monitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04131577A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19543589A1 (en) * | 1995-11-23 | 1997-05-28 | Konrad Laeufer | Bow valve with annular seals on operating shaft |
| CN117722527A (en) * | 2024-01-25 | 2024-03-19 | 浙江佰通防腐设备有限公司 | Fluorine lining ball valve |
-
1990
- 1990-09-19 JP JP24716690A patent/JPH04131577A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19543589A1 (en) * | 1995-11-23 | 1997-05-28 | Konrad Laeufer | Bow valve with annular seals on operating shaft |
| CN117722527A (en) * | 2024-01-25 | 2024-03-19 | 浙江佰通防腐设备有限公司 | Fluorine lining ball valve |
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