JP2924143B2 - Valve opening detector - Google Patents
Valve opening detectorInfo
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- JP2924143B2 JP2924143B2 JP24583690A JP24583690A JP2924143B2 JP 2924143 B2 JP2924143 B2 JP 2924143B2 JP 24583690 A JP24583690 A JP 24583690A JP 24583690 A JP24583690 A JP 24583690A JP 2924143 B2 JP2924143 B2 JP 2924143B2
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- Prior art keywords
- angle
- valve opening
- tan
- detecting means
- valve
- Prior art date
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- Indication Of The Valve Opening Or Closing Status (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、直線性が良好で、角度検出手段の調節弁へ
の取付けが容易で、摩耗等の恐れがなく信頼性、安定性
の良好な弁開度検出器に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention has good linearity, easy mounting of an angle detecting means to a control valve, and has no risk of wear and the like, and has good reliability and stability. The present invention relates to a simple valve opening detector.
〈従来の技術〉 第３図は従来より一般に使用されている従来例の要部
構成説明図である。<Prior Art> FIG. 3 is an explanatory view of a main part configuration of a conventional example generally used conventionally.
図において、 １はコントロールバルブ、２はバルブステム、３はバ
ルブステムに取付けられたクランプ。In the figure, 1 is a control valve, 2 is a valve stem, and 3 is a clamp attached to the valve stem.
４はクランプのクランプピン、５はクランプピンに一
端が取付けられたレバー、６はレバー５の他端に取付け
られたシャフトである。4 is a clamp pin of the clamp, 5 is a lever having one end attached to the clamp pin, and 6 is a shaft attached to the other end of the lever 5.
７はシャフト６の他端に取付けられたポテンショメー
タである。Reference numeral 7 denotes a potentiometer attached to the other end of the shaft 6.
このように、弁開度検出器の変位検出素子としては、
ポテンショメータ等の角度検出素子が使用される事が多
い。Thus, as the displacement detection element of the valve opening detector,
An angle detecting element such as a potentiometer is often used.
グローブ弁等では、弁開度につれて変位するステムの
動きは直線であり、第３図に示すリンク機構を使用し直
線運動を回転運動に代えて角度検出素子に入力される。In a globe valve or the like, the movement of the stem that is displaced according to the valve opening is linear, and is input to the angle detecting element using the link mechanism shown in FIG. 3 instead of the linear movement.
〈発明が解決しようとする課題〉 しかしながら、この様な装置においては、直線運動を
回転運動に変換するので、以下に示す如く、誤差が発生
し、直線性が悪くなる。<Problems to be Solved by the Invention> However, in such an apparatus, since a linear motion is converted into a rotary motion, an error occurs as described below, and the linearity deteriorates.
今、第４図に示す如く、ポテンショメータ７の中心が
弁開度50％の点を通り直線運動をするバルブステム２に
90度の直線上にある場合を考えると、バルブ弁開度０〜
100％に相当するポテンショメータ７の回転角度を２β
とすると、弁開度Ｘ％とポテンショメータの回転角度θ
との関係は、次の様に表せられる。Now, as shown in FIG. 4, the center of the potentiometer 7 passes through the point with the valve opening of 50% to the valve stem 2 which moves linearly.
Considering the case where it is on a straight line of 90 degrees, the valve valve opening degree 0 to 0
The rotation angle of the potentiometer 7 corresponding to 100% is 2β
Then, the valve opening X% and the rotation angle θ of the potentiometer
Is expressed as follows.
Ｘ＝｛（1/2）−（tan（β−θ））／（2tanβ）｝×10
0 これから弁開度25％,50％,75％に対する誤差を２β＝
45度の場合について計算すると、第５図に示すように、
誤差が発生し直線性が悪くなる。X = {(1/2)-(tan (β-θ)) / (2tanβ)} × 10
0 From now on, the error for valve opening 25%, 50%, 75% is 2β =
Calculating for the case of 45 degrees, as shown in FIG. 5,
An error occurs and the linearity deteriorates.
従来においては、この誤差を、カムなどにより補正す
る方法が有ったが、角度検出手段とバルブステム２との
取付け相対位置を誤ってずれて取付けると、誤差を補正
する事にならず、かえって、誤差が大きくなるので、相
対取付け位置を正確にしなければならない制約がある。Conventionally, there has been a method of correcting this error by using a cam or the like. However, if the mounting relative position between the angle detecting means and the valve stem 2 is incorrectly shifted, the error will not be corrected. However, since the error increases, there is a restriction that the relative mounting position must be accurate.
例えば、レバー５が50％位置で水平になるように正確
に取付ける等の制約がある。For example, there is a restriction that the lever 5 is accurately mounted so as to be horizontal at the 50% position.
本発明は、この問題点を、解決するものである。 The present invention solves this problem.
本発明の目的は、直線性が良好で、角度検出手段の調
節弁への取付けが容易で、摩耗等の恐れがなく信頼性、
安定性の良好な弁開度検出器を提供するにある。An object of the present invention is that the linearity is good, the angle detecting means can be easily attached to the control valve, and there is no danger of abrasion or the like.
An object of the present invention is to provide a valve opening detector with good stability.
〈課題を解決するための手段〉 この目的を達成するために、本発明は、 （１）直線状に移動するステムを有する調節弁の弁開度
を角度変位に変換して検出する弁開度検出器において、 調節弁のステムの直線運動を回転運動に変換するリン
ク機構と、 前記角度変位を検出する角度検出手段と、 該角度検出手段の角度信号θと前記調節弁のステムに
垂直な直線と該角度検出手段の基準線との成す角度αと
調節弁の弁開度が０％と100％での角度検出手段の基準
角度からの角度θ１θ２と弁開度Ｘ％とから Ｘ＝［｛tan（θ１−α）−tan（θ−α）｝／｛tan
（θ１−α）−tan（θ２−α）｝］×100 なる演算をなす弁開度演算手段と を具備したことを特徴とする弁開度検出器。<Means for Solving the Problems> In order to achieve this object, the present invention provides: (1) a valve opening which detects a valve opening of a control valve having a stem which moves linearly by converting the valve opening into an angular displacement; In the detector, a link mechanism for converting a linear motion of a stem of the control valve into a rotary motion, an angle detecting means for detecting the angular displacement, a straight line perpendicular to the angle signal θ of the angle detecting means and the stem of the control valve. X from the angle α 1 θ 2 from the reference angle of the angle detecting means and the valve opening degree X% when the valve opening degree of the control valve is 0% and 100%. = [{Tan (θ 1 −α) −tan (θ−α)} / {tan
(Θ 1 −α) −tan (θ 2 −α)｝] × 100, and a valve opening calculating means for calculating the valve opening.
（２）調節弁の弁開度が０％と100％での角度検出手段
の基準角度からの角度θ１θ２を記憶し弁開度演算手段
での演算時に記憶値が取出される基準角度記憶手段 を具備したことを特徴とする特許請求の範囲第１項記載
の弁開度検出器 を構成したものである。(2) The reference angle at which the angle θ 1 θ 2 from the reference angle of the angle detection means is stored when the valve opening of the control valve is 0% and 100%, and the stored value is taken out at the time of calculation by the valve opening calculation means. A valve opening detector according to claim 1, comprising storage means.
〈作用〉 以上の構成において、弁開度演算手段において、角度
検出手段の角度信号θと調節弁のステムに垂直な直線と
角度検出手段の基準線との成す角度αと調節弁の弁開度
が０％と100％での角度検出手段の基準角度からの角度
θ１θ２と弁開度Ｘ％とから Ｘ＝［｛tan（θ１−α）−tan（θ−α）｝／｛tan
（θ１−α）−tan（θ２−α）｝］×100 なる演算をなし弁開度を検出する。<Operation> In the above configuration, in the valve opening calculating means, the angle α formed by the angle signal θ of the angle detecting means, the straight line perpendicular to the stem of the control valve and the reference line of the angle detecting means, and the valve opening of the control valve. X = [{tan ([theta] 1- [alpha])-tan ([theta]-[alpha])} / [deg.] From the angle [theta] 1 [ theta] 2 from the reference angle of the angle detecting means and the valve opening degree X% at 0% and 100%. tan
(Θ 1 −α) −tan (θ 2 −α)｝] × 100 and the valve opening is detected.
更に、基準角度記憶手段を設けて、調節弁の弁開度が
０％と100％での角度検出手段の基準角度からの角度θ
１θ２を記憶し弁開度演算手段での演算時に記憶値が取
出されるようにする。Further, a reference angle storage means is provided, and the angle θ from the reference angle of the angle detection means when the valve opening of the control valve is 0% and 100%
1 θ 2 is stored, and the stored value is taken out at the time of calculation by the valve opening calculating means.
以下、実施例に基づき詳細に説明する。 Hereinafter, a detailed description will be given based on embodiments.
〈実施例〉 第１図は本発明の一実施例の要部構成説明図である。<Embodiment> FIG. 1 is an explanatory view of a main part configuration of an embodiment of the present invention.
図において、第３図と同一記号は同一機能を表わす。 In the figure, the same symbols as those in FIG. 3 represent the same functions.
以下、第３図と相違部分のみ説明する。 Hereinafter, only differences from FIG. 3 will be described.
11は、調節弁１のステム２の直線運動を回転運動に変
換するリンク機構である。Reference numeral 11 denotes a link mechanism that converts a linear motion of the stem 2 of the control valve 1 into a rotary motion.
12は、角度変位を検出する角度検出手段である。 Reference numeral 12 denotes an angle detecting means for detecting an angular displacement.
13は、角度検出手段12の角度信号θと調節弁１のステ
ム２に垂直な直線と角度検出手段12の基準線との成す角
度αと調節弁１の弁開度が０％と100％での角度検出手
段12の基準角度からの角度θ１θ２と弁開度Ｘ％とから Ｘ＝［｛tan（θ１−α）−tan（θ−α）｝／｛tan
（θ１−α）−tan（θ２−α）｝］×100 ……（１） なる演算をなす弁開度演算手段である。Reference numeral 13 denotes an angle α between the angle signal θ of the angle detecting means 12, the straight line perpendicular to the stem 2 of the control valve 1 and the reference line of the angle detecting means 12, and the valve opening of the control valve 1 is 0% and 100%. X = [{tan ([theta] 1- [alpha])-tan ([theta]-[alpha])} / [eta] tan from the angle [theta] 1 [ theta] 2 from the reference angle of the angle detecting means 12 and the valve opening X%.
(Θ 1 −α) −tan (θ 2 −α)｝] × 100 (1) This is a valve opening calculating means for performing the following calculation.
14は、調節弁１の弁開度が０％と100％での角度検出
手段の基準角度からの角度θ１θ２を記憶し弁開度演算
手段12での演算時に記憶値が取出される基準角度記憶手
段である。14 stores the angle θ 1 θ 2 from the reference angle of the angle detecting means when the valve opening of the control valve 1 is 0% and 100%, and the stored value is taken out at the time of calculation by the valve opening calculating means 12. Reference angle storage means.
以上の構成において、弁開度演算手段13において、角
度検出手段12の角度信号θと調節弁１のステム２に垂直
な直線と角度検出手段12の基準線との成す角度αと調節
弁１の弁開度が０％と100％での角度検出手段12の基準
角度からの角度θ１θ２と弁開度Ｘ％とから Ｘ＝［｛tan（θ１−α）−tan（θ−α）｝／｛tan
（θ１−α）−tan（θ２−α）｝］×100 なる演算をなし弁開度を検出する。In the above configuration, in the valve opening calculating means 13, the angle α formed by the angle signal θ of the angle detecting means 12, the straight line perpendicular to the stem 2 of the control valve 1 and the reference line of the angle detecting means 12, and the control valve 1 X = [｛tan (θ 1 −α) −tan (θ−α) from the angle θ 1 θ 2 from the reference angle of the angle detecting means 12 at the valve opening of 0% and 100% and the valve opening X%. )｝ / ｛Tan
(Θ 1 −α) −tan (θ 2 −α)｝] × 100 and the valve opening is detected.
今、α＝０（基準線がステム２に垂直になるように弁
開度検出器を取付けた状態。）とすると、（１）式は、 Ｘ＝（tanθ１−tanθ）／（tanθ１−tanθ２）×100 ……（２） となる。つまり予めθ１，θ２の値を基準角度記憶手段
14に記憶させておき、角度検出手段12の出力をθとする
と、α＝０となるように角度検出手段を調節弁１に取付
けてやれば、（２）式により、正しい弁開度を求める事
が出来る。Now, assuming that α = 0 (a state in which the valve opening detector is attached so that the reference line is perpendicular to the stem 2), the equation (1) is expressed as follows: X = (tan θ 1 −tan θ) / (tan θ 1 − tan θ 2 ) × 100 (2) That is, the values of θ 1 and θ 2 are previously stored in the reference angle storage means.
If the angle detection means is attached to the control valve 1 so that α = 0, assuming that the output of the angle detection means 12 is θ, a correct valve opening is obtained by the equation (2). I can do things.
この結果、 （１）簡単な演算を行う弁開度演算手段13を用いて弁開
度を演算するようにしたので、弁開度検出器の直線性を
向上する事が出来る。As a result, (1) the valve opening is calculated using the valve opening calculating means 13 for performing a simple calculation, so that the linearity of the valve opening detector can be improved.
（２）角度検出手段12を調節弁１に対して自由に取付け
られるようになるので、カム等により補正する方法に比
べ、取付け上の制約がなくなり、組立てが楽になる。(2) Since the angle detecting means 12 can be freely mounted on the control valve 1, there is no restriction on mounting as compared with the method of correcting with a cam or the like, and the assembly becomes easier.
（３）カム等の機械的な検出に比し、電気的に補正する
事が出来るので、摩耗等の恐れがなく、信頼性、安定性
が向上する。(3) Compared with mechanical detection of a cam or the like, electrical correction can be performed, so that there is no fear of wear and the like, and reliability and stability are improved.
なお、θ１，θ２はポテンショメータ等により設定す
る様にしても良いが、第１図に示す如く、基準角度記憶
手段14に記憶させる様にしてもよい。Note that θ 1 and θ 2 may be set by potentiometers or the like, but may be stored in the reference angle storage means 14 as shown in FIG.
〈発明の効果〉 以上説明したように、本発明は、 １）直線状に移動するステムを有する調節弁の弁開度を
角度変位に変換して検出する弁開度検出器において、 調節弁のステムの直線運動を回転運動に変換するリン
ク機構と、 前記角度変位を検出する角度検出手段と、 該角度検出手段の角度信号θと前記調節弁のステムに
垂直な直線と該角度検出手段の基準線との成す角度αと
調節弁の弁開度が０％と100％での角度検出手段の基準
角度からの角度θ１θ２と弁開度Ｘ％とから Ｘ＝［｛tan（θ１−α）−tan（θ−α）｝／｛tan
（θ１−α）−tan（θ２−α）｝］×100 なる演算をなす弁開度演算手段とを具備したこと を特徴とする弁開度検出器。<Effects of the Invention> As described above, the present invention provides: 1) a valve opening detector for converting a valve opening of a control valve having a stem that moves linearly into angular displacement and detecting the angular displacement; A link mechanism for converting a linear motion of the stem into a rotary motion, an angle detecting means for detecting the angular displacement, an angle signal θ of the angle detecting means, a straight line perpendicular to the stem of the control valve, and a reference for the angle detecting means. X = [｛tan (θ 1) from the angle α between the line and the angle θ 1 θ 2 from the reference angle of the angle detecting means and the valve opening X% when the valve opening of the control valve is 0% and 100%. −α) -tan (θ−α)｝ / ｛tan
(Θ 1 −α) −tan (θ 2 −α)｝] × 100. A valve opening detector comprising: a valve opening calculator.
（２）調節弁の弁開度が０％と100％での角度検出手段
の基準角度からの角度θ１θ２を記憶し弁開度演算手段
での演算時に記憶値が取出される基準角度記憶手段 を具備したことを特徴とする特許請求の範囲第１項記載
の弁開度検出器 を構成した。(2) The reference angle at which the angle θ 1 θ 2 from the reference angle of the angle detection means is stored when the valve opening of the control valve is 0% and 100%, and the stored value is taken out at the time of calculation by the valve opening calculation means. A valve opening detector according to claim 1, characterized by comprising storage means.
この結果、 （１）簡単な演算を行う弁開度演算手段を用いて弁開度
を演算するようにしたので、弁開度検出器の直線性を向
上する事が出来る。As a result, (1) since the valve opening is calculated using the valve opening calculating means for performing a simple calculation, the linearity of the valve opening detector can be improved.
（２）角度検出手段を調節弁に対して自由に取付けられ
るようになるので、カム等により補正する方法に比べ、
取付け上の制約がなくなり、組立てが楽になる。(2) Since the angle detecting means can be freely attached to the control valve, compared with the method of correcting with a cam or the like,
There are no restrictions on installation, and assembly becomes easier.
（３）カム等の機械的な検出に比し、電気的に補正する
事が出来るので、摩耗等の恐れがなく、信頼性、安定性
が向上する。(3) Compared with mechanical detection of a cam or the like, electrical correction can be performed, so that there is no fear of wear and the like, and reliability and stability are improved.
したがって、本発明によれば、直線性が良好で、角度
検出手段の調節弁への取付けが容易で、摩耗等の恐れが
なく信頼性、安定性の良好な弁開度検出器を実現するこ
とができる。Therefore, according to the present invention, it is possible to realize a valve opening degree detector having good linearity, easy attachment of the angle detecting means to the control valve, good reliability and stability without fear of wear and the like. Can be.
第１図は本発明の一実施例の要部構成説明図、第２図は
第１図の動作説明図、第３図は従来より一般に使用され
ている従来例の構成説明図、第４図，第５図は第３図の
動作説明図である。 １……調節弁、２……バルブステム、11……リンク機
構、12……角度検出手段、13……弁開度演算手段、14…
…基準角度記憶手段。FIG. 1 is an explanatory view of a main part of one embodiment of the present invention, FIG. 2 is an explanatory view of the operation of FIG. 1, FIG. 3 is an explanatory view of a configuration of a conventional example which has been generally used, and FIG. FIG. 5 is an explanatory diagram of the operation of FIG. 1 ... control valve, 2 ... valve stem, 11 ... link mechanism, 12 ... angle detection means, 13 ... valve opening degree calculation means, 14 ...
... Reference angle storage means.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西島 剛志 東京都武蔵野市中町２丁目９番32号 横 河電機株式会社内 (72)発明者 翠川 稔 東京都武蔵野市中町２丁目９番32号 横 河電機株式会社内 (72)発明者 笠原 康男 東京都武蔵野市中町２丁目９番32号 横 河電機株式会社内 (72)発明者 菅原 藤和 東京都武蔵野市中町２丁目９番32号 横 河電機株式会社内 (56)参考文献 実公 昭59−21342（ＪＰ，Ｙ２) (58)調査した分野(Int.Cl.6，ＤＢ名) F16K 37/00 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takeshi Nishijima 2-9-132 Nakamachi, Musashino City, Tokyo Inside Yokogawa Electric Corporation (72) Inventor Minoru Midorikawa 2-9-132 Nakamachi, Musashino City, Tokyo Next to Inside Kawa Electric Co., Ltd. (72) Inventor Yasuo Kasahara 2-93-2, Nakamachi, Musashino-shi, Tokyo Yokogawa Electric Co., Ltd. (72) Towa Sugawara 2-9-132, Nakamachi, Musashino-shi, Tokyo Yokogawa Electric Incorporated (56) References Jikken Sho 59-21342 (JP, Y2) (58) Fields investigated (Int. Cl. 6 , DB name) F16K 37/00
Claims (2)
弁開度を角度変位に変換して検出する弁開度検出器にお
いて、 調節弁のステムの直線運動を回転運動に変換するリンク
機構と、 前記角度変位を検出する角度検出手段と、 該角度検出手段の角度信号θと前記調節弁のステムに垂
直な直線と該角度検出手段の基準線との成す角度αと調
節弁の弁開度が０％と100％での角度検出手段の基準角
度からの角度θ１θ２と弁開度Ｘ％とから Ｘ＝［｛tan（θ１−α）−tan（θ−α）｝／｛tan
（θ１−α）−（θ２−α）｝］×100 なる演算をなす弁開度演算手段と を具備したことを特徴とする弁開度検出器検出器。1. A link mechanism for converting a linear motion of a stem of a control valve into a rotary motion in a valve opening detector for detecting a valve opening of a control valve having a linearly moving stem by converting the valve opening into an angular displacement. An angle detecting means for detecting the angular displacement; an angle α formed by an angle signal θ of the angle detecting means, a straight line perpendicular to a stem of the control valve and a reference line of the angle detecting means, and a valve opening of the control valve. From the angle θ 1 θ 2 from the reference angle of the angle detecting means at 0% and 100% and the valve opening X%, X = [{tan (θ 1 −α) −tan (θ−α)} / ｛Tan
(Θ 1 −α) − (θ 2 −α)｝] × 100, and a valve opening calculating means for calculating the valve opening.
出手段の基準角度からの角度θ１θ２を記憶し弁開度演
算手段での演算時に記憶値が取り出される基準角度記憶
手段 を具備したことを特徴とする特許請求の範囲第１項記載
の弁開度検出器。2. A reference from which the angle θ 1 θ 2 from the reference angle of the angle detecting means is stored when the valve opening of the control valve is 0% and 100%, and the stored value is taken out at the time of calculation by the valve opening calculating means. 2. The valve opening detector according to claim 1, further comprising an angle storage unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24583690A JP2924143B2 (en) | 1990-09-14 | 1990-09-14 | Valve opening detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24583690A JP2924143B2 (en) | 1990-09-14 | 1990-09-14 | Valve opening detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04125380A JPH04125380A (en) | 1992-04-24 |
| JP2924143B2 true JP2924143B2 (en) | 1999-07-26 |
Family
ID=17139574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24583690A Expired - Fee Related JP2924143B2 (en) | 1990-09-14 | 1990-09-14 | Valve opening detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2924143B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL227323A (en) * | 2013-07-04 | 2016-06-30 | Israel Radomsky | System for wirelessly monitoring and predicting failures of linear valves |
-
1990
- 1990-09-14 JP JP24583690A patent/JP2924143B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04125380A (en) | 1992-04-24 |
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