JPS6134581B2 - - Google Patents
Info
- Publication number
- JPS6134581B2 JPS6134581B2 JP16140978A JP16140978A JPS6134581B2 JP S6134581 B2 JPS6134581 B2 JP S6134581B2 JP 16140978 A JP16140978 A JP 16140978A JP 16140978 A JP16140978 A JP 16140978A JP S6134581 B2 JPS6134581 B2 JP S6134581B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- ball screw
- signal
- control
- shaft
- 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
Links
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 239000012530 fluid Substances 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000033001 locomotion Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
- Feedback Control In General (AREA)
- Control Of Fluid Pressure (AREA)
Description
【発明の詳細な説明】
本発明は制御系を所望の状態にするように制御
系へ流体を供給し、あるいは制御系から流体を排
出する制御弁に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control valve that supplies fluid to or discharges fluid from a control system so as to bring the control system into a desired state.
従来の制御弁は実公昭38−24061号公報に示さ
れているように、ポテンシヨ・メータ等の位置検
出手段で弁軸の位置を常時検出するようになつて
いる。しかしながら、閉弁位置は位置検出手段の
特定の信号値に１対１に対応しているので、信号
処理の遅れ、減速ギヤやねじ結合部のガタ、バツ
クラツシユ、あるいは弁体が弁座の摩耗等で、こ
の１対１の対応にズレが生じると、不完全閉弁に
なつたり、過剰な閉弁操作力が加わつて弁部、ギ
ヤ、モータが破損することがある。 As disclosed in Japanese Utility Model Publication No. 38-24061, conventional control valves constantly detect the position of the valve stem using a position detection means such as a potentiometer. However, since the valve closing position corresponds one-to-one to a specific signal value of the position detection means, there may be delays in signal processing, play in the reduction gear or threaded joint, bumps, or wear of the valve seat. If a discrepancy occurs in this one-to-one correspondence, the valve may be incompletely closed, or excessive valve-closing force may be applied, resulting in damage to the valve portion, gear, and motor.
従つて、本発明は、信号処理の遅れ、減速ギヤ
やねじ結合部のガタ、バツクラツシユ、あるいは
弁体や弁座の摩耗等が生じても、不完全閉弁にな
つたり、過剰な閉弁操作力が加わつて弁部、ギ
ヤ、モータが破損することのない、制御弁を得る
ことを目的とする。 Therefore, the present invention prevents incomplete valve closing or excessive valve closing operation even if there is a delay in signal processing, rattling or bumping of the reduction gear or threaded joint, or wear of the valve body or valve seat. The purpose of this invention is to obtain a control valve in which the valve part, gear, and motor will not be damaged by force.
上記の目的を達成するために講じた本発明の技
術的手段は、制御手段が目標信号と制御系の状態
の検出信号を受けて操作信号を発し、操作手段が
この操作信号を受けて弁手段を操作し、制御系に
又は制御系から連通した流体通路の開度を調節す
る制御弁に於いて、操作手段の出力軸にボールス
クリユーの回転軸を、回転力を受けると共に軸方
向に変位できる様に連結し、ボールスクリユーの
往復動部材に弁手段の弁軸を連結し、弾性手段で
ボールスクリユーの回転軸を弁手段の閉弁方向に
付勢し、弾性手段の可動端にその圧縮変位と共に
変位するように伝達部材を取り付け、操作手段に
閉弁方向の操作を停止する信号を送るリミツトス
イツチを制御手段に組み込むと共に、そのリミツ
トスイツチを伝達部材が所定量変位した位置で駆
動するように取り付けた、ものである。 The technical means of the present invention taken to achieve the above object is that the control means receives the target signal and the detection signal of the control system state and issues an operation signal, and the operation means receives this operation signal and In a control valve that operates a control valve and adjusts the opening degree of a fluid passage communicating with or from a control system, the rotation shaft of a ball screw is applied to the output shaft of the operating means, and the shaft receives rotational force and is displaced in the axial direction. The valve shaft of the valve means is connected to the reciprocating member of the ball screw, and the rotating shaft of the ball screw is urged in the closing direction of the valve means by the elastic means, and the movable end of the elastic means is A transmission member is attached so as to be displaced along with the compression displacement, and a limit switch that sends a signal to the operating means to stop operation in the valve closing direction is incorporated into the control means, and the limit switch is driven at a position where the transmission member is displaced by a predetermined amount. It is something that is attached to.
上記の技術的手段の作用は下記の通りである。 The operation of the above technical means is as follows.
閉弁した後弾性手段を圧縮し、その圧縮変位と
共に変位する伝達部材が所定量変位した時にリミ
ツトスイツチから閉弁方向の操作を停止する信号
が発つせられるので、弁体や弁座が摩耗しても、
あるいは操作力伝達系統にガタが生じても、常に
弾性手段から所定の付勢力を受けた状態で、完全
に閉弁する。また、信号処理が遅れたり、弁体と
弁座の間に固形物が挟まつても、弾性手段が緩衝
作用をするので、弁部がギヤやモータを破損する
ようなことがない。このためにまた、閉弁位置の
検出精度は低くてもよく、安価なマイクロ・スイ
ツチ（リミツト・スイツチ）を用いることもでき
る。 After the valve is closed, the elastic means is compressed, and when the transmission member that is displaced along with the compressed displacement is displaced by a predetermined amount, a signal is issued from the limit switch to stop the operation in the valve closing direction, so the valve body and valve seat are not worn out. too,
Alternatively, even if play occurs in the operating force transmission system, the valve will always be completely closed while receiving a predetermined urging force from the elastic means. Further, even if signal processing is delayed or solid matter is caught between the valve body and the valve seat, the elastic means acts as a buffer, so the valve part will not damage the gear or motor. For this reason, the accuracy of detecting the valve closing position may be low, and an inexpensive micro switch (limit switch) may be used.
以下図示の実施例に基づいて詳細に説明する。
第１図は本発明による制御弁をいわゆる減圧弁と
して用いた場合の概略を示すブロツク図である。
弁手段１の下流側配管２が制御系となり、制御系
２の圧力は圧力検出手段４で検出される。５は制
御手段であり、圧力検出手段４からの信号が入力
される。制御系２の所望の圧力状態を表わす目標
値は入力手段６から制御手段５に入力される。制
御手段５はLSIからなるデジタルコンピユータを
有し、目標値を記憶し、記憶されたプログラムに
従つて、目標値と検出圧力値の比較、演算等を行
い、所定の操作信号を出力する。操作手段７はス
テツプモータを有し、そのドラーバー８に対して
制御手段から上記の操作信号が送られる。この操
作信号は一般にはモータの回転方向（正転か逆転
か）と単位時間あたりの回転ステツプ数の情報を
含む。かくして操作手段７により弁手段１はその
開度を調節され、制御系２の圧力が目標値より小
さければ弁開度を増大するように弁手段は操作さ
れ、入口側配管３からの圧力流体の供給割合が増
大され、また逆に、制御系２の圧力が目標値より
大きければ弁開度を小さくするように弁手段１は
操作され、入口側配管３からの流体圧供給の割合
が減小される。かくしてLSIの小形のデジタルコ
ンピユータとステツプモータを用いて正確な制御
をする調節弁が得られる。コンピユータの小形化
に伴つて、遠隔制御ではなく、コンピユータを搭
載した単体の制御弁が得られる。ステツプモータ
はその大出力の故に減速機構を簡単にでき、ボー
ルスクリユーを用いることができる。９は閉弁位
置検出手段を示す。これには弁体が弁座に当接し
たときのその当接力を伝える弁軸の荷重を検出す
る手段が用いられる。閉弁位置検出手段からの信
号は制御手段に送られ、コンピユータのプログラ
ムに従つて処理され、制御手段から操作手段へ閉
弁方向の操作を禁止する信号が送られる。 A detailed explanation will be given below based on the illustrated embodiment.
FIG. 1 is a block diagram schematically showing the case where the control valve according to the present invention is used as a so-called pressure reducing valve.
A downstream piping 2 of the valve means 1 serves as a control system, and the pressure of the control system 2 is detected by a pressure detection means 4. Reference numeral 5 denotes a control means, into which a signal from the pressure detection means 4 is input. A target value representing a desired pressure state of the control system 2 is inputted to the control means 5 from the input means 6 . The control means 5 has a digital computer consisting of an LSI, stores the target value, performs comparisons and calculations between the target value and the detected pressure value, and outputs a predetermined operation signal according to the stored program. The operating means 7 has a step motor, and the above-mentioned operating signal is sent to the driver bar 8 from the control means. This operation signal generally includes information on the direction of rotation of the motor (forward or reverse) and the number of rotation steps per unit time. In this way, the opening degree of the valve means 1 is adjusted by the operating means 7, and if the pressure of the control system 2 is lower than the target value, the valve means is operated to increase the valve opening degree, and the pressure fluid from the inlet side piping 3 is controlled. The supply ratio is increased, and conversely, if the pressure in the control system 2 is greater than the target value, the valve means 1 is operated to reduce the valve opening, and the ratio of fluid pressure supply from the inlet side piping 3 is reduced. be done. In this way, a control valve that can be accurately controlled using a small LSI digital computer and a step motor can be obtained. With the miniaturization of computers, a single control valve equipped with a computer is now available instead of being remotely controlled. Because of its large output, the step motor allows for a simple reduction mechanism, and a ball screw can be used. 9 indicates a valve closing position detection means. For this purpose, means is used to detect the load on the valve shaft that transmits the contact force when the valve body contacts the valve seat. A signal from the valve closing position detecting means is sent to the control means and processed according to a computer program, and a signal is sent from the control means to the operating means to prohibit operation in the valve closing direction.
第２図は上記第１図の実施例をより具体化した
一例を示す。但し、本実施例は弁手段１、操作手
段７、閉弁位置検出手段９から成る第２図Ａ部の
みを具体化したもので、他部分は第１図と共通し
説明は省略する。 FIG. 2 shows a more specific example of the embodiment shown in FIG. 1 above. However, this embodiment embodies only the section A in FIG. 2, which consists of the valve means 1, the operating means 7, and the valve closing position detecting means 9, and the other parts are the same as those in FIG. 1, and their explanation will be omitted.
弁手段１を成す部分について、１０は弁本体を
示し、この本体１０は上流配管（図示せず）が連
通する上流通路１１と、下流配管（図示せず）が
連通する下流通路１２及び下流通路１２に連通す
る開口１４とを有する。１５は他配管との接続用
のフランジ部を示す。１３は上流通路１１と下流
通路１２とを連通する弁口を示し、開口１４から
ガスケツト１６，１７を介して気密的に挿着され
た円筒状の弁座部材１８によつて形成される。１
９は弁座部材１８に設けられた流通孔を示す。開
口１４は弁座部材１８を挿着後、ボルト、ナツト
の如き締付手段（図示せず）を用いて弁本体１０
に固着された蓋体２０によつて塞がれ、弁座部材
１８は弁本体１０内の隔壁と蓋体２０との間に挾
持される。２１は弁本体１０と蓋体２０との間の
気密を保つガスケツトを示す。２２は弁座部材１
８内に摺動可能に配された弁体を示し、この弁体
２２はＯリング２３を介して弁座部材１８内を気
密的に摺動し、弁口１３の開度を変更する。２４
は弁体２２を貫通して弁体２２の上面室２５に上
流側圧力を導入する連通孔を示し、弁体２２の上
下面に作用する流体圧力を相殺し、小さな駆動力
で弁体２２が摺動することを可能にする。２６は
弁体２２を駆動する弁軸を示し、鍔部５８とナツ
ト５９を用いて弁体２２に連結する。この弁軸２
６は蓋体２０を貫通して外部に突出し、その貫通
部はプラグ２７によつて締付されたグラントパツ
キング２８と、Ｏリング２９によつて密閉され
る。３０はプラグ２７と蓋体２０との間の気密を
保つガスケツトを示す。 Regarding the parts constituting the valve means 1, 10 indicates a valve body, and this body 10 has an upstream passage 11 communicating with an upstream piping (not shown), a downstream passage 12 and a downstream passage communicating with a downstream piping (not shown). The opening 14 communicates with the passage 12. Reference numeral 15 indicates a flange portion for connection with other piping. Reference numeral 13 indicates a valve port that communicates the upstream passage 11 and the downstream passage 12, and is formed by a cylindrical valve seat member 18 that is airtightly inserted from the opening 14 via gaskets 16 and 17. 1
Reference numeral 9 indicates a communication hole provided in the valve seat member 18. After the valve seat member 18 is inserted into the opening 14, the valve body 10 is tightened using a tightening means (not shown) such as a bolt or nut.
The valve seat member 18 is held between the partition wall inside the valve body 10 and the lid 20. Reference numeral 21 indicates a gasket that maintains airtightness between the valve body 10 and the lid body 20. 22 is the valve seat member 1
8, the valve body 22 slides airtightly within the valve seat member 18 via an O-ring 23 to change the opening degree of the valve port 13. 24
indicates a communication hole that penetrates the valve body 22 and introduces upstream pressure into the upper surface chamber 25 of the valve body 22, cancels out the fluid pressure acting on the upper and lower surfaces of the valve body 22, and allows the valve body 22 to move with a small driving force. Allows sliding. Reference numeral 26 indicates a valve shaft that drives the valve body 22, and is connected to the valve body 22 using a collar portion 58 and a nut 59. This valve stem 2
6 protrudes to the outside through the lid 20, and its penetrating portion is sealed by a gland packing 28 tightened by a plug 27 and an O-ring 29. 30 indicates a gasket that maintains airtightness between the plug 27 and the lid body 20.
次に、操作手段７を成す部分には、ステツプモ
ータ３１が用いられ、このステツプモータ３１は
蓋体２０に固着された取付筒３２に担持される。
また、この取付筒３２は弁本体１０に蓋体２０を
固着する際に用いられた締付部材により蓋体２０
に固着される。この取付筒３２は蓋体２０に安定
に固着する為に下部にフランジ部４２を有し、か
つ中空で、その中空内面の上部には環状の段部３
３が形成され、この段部３３にステツプモータ３
１の凸部３４が接合し、ステツプモータ３１は正
確に位置決めされる。このステツプモータ３１の
下面には出力軸３５が突出し、この出力軸３５の
下端は断面略逆Ｌ字形で継手部３６の一部を形成
する。５７は出力軸と同軸的に形成された上部に
突出する手動操作軸を示し、スパナの工具を掛け
て手動で弁手段１の開度を変更する時に用いられ
る。出力軸３５には上端を断面略Ｌ字形に形成し
た被動軸３７が対応し、その断面略Ｌ字形の部分
は上記出力軸３５の断面略逆Ｌ字形の部分と共に
継手部３６を成す。この継手部３６は出力軸３５
の正逆両方向の回転を被動軸３７に伝達できる両
方向継手の一種で、この継手部３６の外周には案
内筒３８が取り付けられ、継手部３６のかみ合い
が外れることを防止している。３９は案内筒３８
が外れ落ちることを防ぐ為に、被動軸３７に取り
付けられたスナツプリングを示す。被動軸３７に
は中部から下部にかけて螺子が刻設され、この被
動軸３７の下端はボールスクリユー４０に連結
し、出力軸３５から被動軸３７に伝達された回転
はこのボールスクリユー４０自体の往復動に変換
される。４１はボールスクリユー４０のケーシン
グに螺着されたガイド部材を示し、ボールスクリ
ユー４０の傾きを防止して円滑な減束及び運動方
向の変換を行う。また、このガイド部材４１の下
部には、上記弁手段１側の弁軸２６が螺着され、
ロツクナツト４３で緩み止めされている。４４は
ガイド部材４１の回転を禁止し、かつ案内するガ
イド棒を示し、このガイド棒４４は下端を蓋体２
０の孔４５で、一方上端を保持板４６の孔４７で
保持され、蓋体２０と取付筒３２の間に挾持され
ている。 Next, a step motor 31 is used as the operating means 7, and this step motor 31 is carried by a mounting tube 32 fixed to the lid 20.
Further, this mounting cylinder 32 is attached to the lid body 20 by a tightening member used when fixing the lid body 20 to the valve body 10.
is fixed to. This mounting cylinder 32 has a flange part 42 at the lower part in order to stably fix it to the lid body 20, and is hollow, and an annular step part 3 is provided at the upper part of the hollow inner surface.
3 is formed, and a step motor 3 is attached to this stepped portion 33.
The first protrusion 34 is joined, and the step motor 31 is accurately positioned. An output shaft 35 protrudes from the lower surface of the step motor 31, and the lower end of the output shaft 35 has a substantially inverted L-shaped cross section and forms a part of a joint portion 36. Reference numeral 57 indicates a manual operation shaft that is formed coaxially with the output shaft and projects from the top, and is used when manually changing the opening degree of the valve means 1 by applying a spanner tool. Corresponding to the output shaft 35 is a driven shaft 37 whose upper end is formed into a substantially L-shaped cross section, and the substantially L-shaped portion of the driven shaft 37 forms a joint portion 36 together with the portion of the output shaft 35 whose cross section is substantially inverted L-shaped. This joint part 36 is connected to the output shaft 35
This is a type of bidirectional joint that can transmit rotation in both forward and reverse directions to the driven shaft 37. A guide tube 38 is attached to the outer periphery of the joint portion 36 to prevent the joint portion 36 from disengaging. 39 is the guide tube 38
A snap spring attached to the driven shaft 37 is shown to prevent it from coming off and falling. The driven shaft 37 is threaded from the middle to the lower part, and the lower end of the driven shaft 37 is connected to a ball screw 40, and the rotation transmitted from the output shaft 35 to the driven shaft 37 is caused by the rotation of the ball screw 40 itself. converted into reciprocating motion. Reference numeral 41 indicates a guide member screwed onto the casing of the ball screw 40, which prevents the ball screw 40 from tilting and smoothly reduces the flux and changes the direction of movement. Further, the valve shaft 26 on the side of the valve means 1 is screwed into the lower part of the guide member 41.
It is prevented from loosening with lock nut 43. Reference numeral 44 denotes a guide rod that prohibits and guides the guide member 41 from rotating, and the lower end of this guide rod 44 is connected to the lid body 2.
0 hole 45 , one upper end is held by a hole 47 of a holding plate 46 , and is sandwiched between the lid body 20 and the mounting cylinder 32 .
次に、閉弁位置検出手段９を成す部分について
第３図に部分拡大して説明する。４８は被動軸３
７の上部に上記スナツプリング３９を介して取り
付けられた上下動板を示し、この上下動板４８の
上下には間隙４９を設けてボールベアリング５
０，５１が配される。ベアリング５０は図示の如
く閉弁状態で被動軸３７が上動した時の回転を受
け、他方ベアリング５１は開弁状態で被動軸３７
が下動した時に、その被動軸３７や減速機構４０
等の重力を受ける。５２はベアリング５０上に載
置された伝達部材を示し、この部材５２は皿バネ
５３を用いてベアリング５０に付勢されている。
また、伝達部材５２は板状で、右端部は取付筒３
２の上面に設けられた溝５４内に位置し、かつ上
方に折り曲げられ、その折り曲げ端の平面部はマ
イクロスイツチ５５に対向している。また、マイ
クロスイツチ５５は取付板５６を介して取付筒３
２に取り付けられる。６０はステツプモータ３
１、マイクロスイツチ等の部分を覆う為に取付筒
３２上端に取り付けられたカバーを示し、このカ
バー６０には配線の挿入口６１が設けられてい
る。 Next, a portion forming the valve closed position detecting means 9 will be explained with a partial enlargement shown in FIG. 3. 48 is driven shaft 3
A vertically moving plate is shown attached to the upper part of the ball bearing 5 via the snap spring 39, and a gap 49 is provided above and below this vertically moving plate 48.
0,51 are arranged. As shown in the figure, the bearing 50 receives rotation when the driven shaft 37 moves upward in the valve closed state, while the bearing 51 receives the rotation when the driven shaft 37 moves upward in the valve open state.
When the driven shaft 37 and deceleration mechanism 40 move downward,
etc. subject to gravity. Reference numeral 52 indicates a transmission member placed on the bearing 50, and this member 52 is biased against the bearing 50 using a disc spring 53.
Further, the transmission member 52 is plate-shaped, and the right end portion is attached to the mounting tube 3.
It is located in a groove 54 provided on the top surface of the switch 2 and is bent upward, with the flat part of the bent end facing the micro switch 55. Further, the micro switch 55 is connected to the mounting tube 3 via the mounting plate 56.
Can be attached to 2. 60 is step motor 3
1. A cover is shown attached to the upper end of the mounting tube 32 to cover parts such as a micro switch, and this cover 60 is provided with a wiring insertion opening 61.
本実施例の作用について説明する。ドライバー
８からステツプモータ３１に操作信号が送られた
場合、ステツプモータ３１はこの指令に基づいて
出力軸３５を回転する。出力軸３５はこの回転を
被動軸３７に伝達し、被動軸３７の回転はボール
スクリユー４０自体の上下動に変換される。この
ボールスクリユー４０の上下動はガイド部材４１
を介して弁軸２６に伝達され、弁軸２６は弁体２
２を駆動して弁口１３の開度を変更する。そし
て、図示の如き閉弁状態になつた場合、弁体２２
が弁座部材１８に当接するので弁軸２６はこれ以
上下動できず、この反力はボールスクリユー４０
から被動軸３７を押し上げる方向に作用し、被動
軸３７は上動し始める。上下動板４８は皿バネ５
３の弾性力に抗して被動軸３７の上動に伴つて上
昇し、ベアリング５０を介して伝達部材５２を持
ち上げる。マイクロスイツチ５５は伝達部材５２
の所定以上の上昇に伴つてスイツチングされ、閉
弁位置検出信号を制御手段５に送り、制御手段５
からステツプモータ３１へ閉弁方向の運転を禁止
する信号が送られる。従つて、弁体２２が弁座部
材１８に着座した後も駆動され続け、弁体２２や
弁座部材１８等に無理な力が作用して、この部分
が破損変形する危険がなくなる。ここに於いて、
ボールスクリユー４０は閉弁位置に於いて弁軸２
６の変位を禁止する作用を有する。また、閉弁位
置に於いて、出力軸３５の回転力を弁軸２６に伝
達する部分に介在され、この荷重を受けて圧縮さ
れる皿バネ５３、この皿バネ５３の圧縮に伴つて
マイクロスイツチ５５をスイツチングする伝達部
材５２は、閉弁位置に於いて弁軸２６に作用する
力でこれを検出する作用を有する。また、閉弁状
態から開弁状態に戻る場合、ステツプモータ３１
の運転に伴つて被動軸３７は皿バネ５３の弾性力
により、上下動板４８がベアリング５１に当接す
る位置まで下動する。そして、上下動板４８がベ
アリング５１に当接した後は、ボールスクリユー
４０自体が上動し、ガイド部材４１が弁軸２６を
持ち上げ、弁軸２６は弁体２２を開弁方向に駆動
して弁口１３の開度を変更する。かくして、本実
施例では皿バネ５３の如き小型で大きな弾性力を
発揮する弾性体を用い、かつ伝達部材５２を取付
筒３２の溝５４を収容しているので閉弁位置検出
手段９を成す部分の占有空間を少なくでき、制御
弁をコンパクト化するで効果がある。また、被動
軸３７の螺子部、ボールスクリユー４０、ガイド
部材４１の如き機械的な部分も取付筒３２内に配
し、直接外気にさらさない様にしているので、こ
の部分が錆やゴミカミによつて作動不能を起こす
危険がなくなる。更に、ステツプモータ３１は大
出力を発揮できるので、ボールスクリユー４０の
如き減速比の小さな減速機構を適用できる。ま
た、ボールスクリユー４０は他の減速機構に比べ
てパツクラツシユが殆どなく、かつ円滑な運動を
行うので、正密な開閉弁位置を取ることができ正
確な制御を行える。 The operation of this embodiment will be explained. When an operation signal is sent from the driver 8 to the step motor 31, the step motor 31 rotates the output shaft 35 based on this command. The output shaft 35 transmits this rotation to the driven shaft 37, and the rotation of the driven shaft 37 is converted into vertical movement of the ball screw 40 itself. The vertical movement of this ball screw 40 is controlled by a guide member 41.
The signal is transmitted to the valve shaft 26 via the valve body 2, and the valve shaft 26
2 to change the opening degree of the valve port 13. When the valve is in the closed state as shown in the figure, the valve body 22
comes into contact with the valve seat member 18, so the valve shaft 26 cannot move down any further, and this reaction force is applied to the ball screw 40.
This acts in a direction to push up the driven shaft 37, and the driven shaft 37 begins to move upward. The vertical moving plate 48 is a disc spring 5
As the driven shaft 37 moves upward against the elastic force of 3, the transmission member 52 is lifted up via the bearing 50. The micro switch 55 is the transmission member 52
is switched as the valve rises above a predetermined value, and a valve closing position detection signal is sent to the control means 5.
A signal is sent to the step motor 31 from the step motor 31 to prohibit operation in the valve closing direction. Therefore, even after the valve body 22 is seated on the valve seat member 18, the valve body 22 continues to be driven, and there is no danger that unreasonable force will be applied to the valve body 22, the valve seat member 18, etc., causing damage and deformation of these parts. Here,
The ball screw 40 is connected to the valve stem 2 in the valve closing position.
It has the effect of inhibiting the displacement of 6. In addition, in the valve closing position, a disc spring 53 is interposed in the portion that transmits the rotational force of the output shaft 35 to the valve shaft 26 and is compressed under the load, and as the disc spring 53 is compressed, the micro switch is The transmission member 52 that switches the valve 55 has the function of detecting the force acting on the valve shaft 26 when the valve is in the closed position. In addition, when returning from the valve closed state to the valve open state, the step motor 31
With the operation, the driven shaft 37 is moved downward by the elastic force of the disc spring 53 to a position where the vertical moving plate 48 comes into contact with the bearing 51. After the vertical moving plate 48 comes into contact with the bearing 51, the ball screw 40 itself moves upward, the guide member 41 lifts the valve shaft 26, and the valve shaft 26 drives the valve body 22 in the valve opening direction. to change the opening degree of the valve port 13. Thus, in this embodiment, a small elastic body such as the disc spring 53 that exerts a large elastic force is used, and the transmission member 52 is housed in the groove 54 of the mounting tube 32, so that the part forming the valve closing position detection means 9 is It is effective in reducing the space occupied by the control valve and making the control valve more compact. In addition, mechanical parts such as the screw part of the driven shaft 37, the ball screw 40, and the guide member 41 are arranged inside the mounting tube 32 so that they are not directly exposed to the outside air, so these parts are not susceptible to rust or dirt. This eliminates the risk of malfunction. Furthermore, since the step motor 31 can exert a large output, a reduction mechanism with a small reduction ratio, such as a ball screw 40, can be applied. In addition, the ball screw 40 has almost no crashing compared to other speed reduction mechanisms and moves smoothly, so that the opening/closing valve can be positioned accurately and accurate control can be performed.
第１図は本発明の一実施例の制御弁を示すブロ
ツク図、第２図は第１図のＡ部のみを具体化した
一例図、第３図は第１図の部分拡大図を示す。
１は弁手段、４は圧力検出手段、５は制御手
段、６は入力手段、７は操作手段、８はドライバ
ー、９は閉弁位置検出手段、１０は弁本体、１１
は上流通路、１２は下流通路、１３は弁口、１８
は弁座部材、２０は蓋体、２２は弁体、２６は弁
軸、３１はステツプモータ、３２は取付筒、３５
は出力軸、３６は継手部、３７は被動軸、４０は
ボールスクリユー、４１はガイド部材、４８は上
下動板、５０と５１はベアリング、５２は伝達部
材、５３は皿バネ、５５はマイクロスイツチ、６
０はカバーを示す。
FIG. 1 is a block diagram showing a control valve according to an embodiment of the present invention, FIG. 2 is an example diagram embodying only part A in FIG. 1, and FIG. 3 is a partially enlarged view of FIG. 1. 1 is a valve means, 4 is a pressure detection means, 5 is a control means, 6 is an input means, 7 is an operating means, 8 is a driver, 9 is a valve closing position detection means, 10 is a valve body, 11
is an upstream passage, 12 is a downstream passage, 13 is a valve port, 18
20 is a valve seat member, 20 is a lid body, 22 is a valve body, 26 is a valve shaft, 31 is a step motor, 32 is a mounting cylinder, 35
is an output shaft, 36 is a joint, 37 is a driven shaft, 40 is a ball screw, 41 is a guide member, 48 is a vertical moving plate, 50 and 51 are bearings, 52 is a transmission member, 53 is a disc spring, 55 is a micro Switch, 6
0 indicates cover.
Claims (1)
号を受けて操作信号を発し、操作手段がこの操作
信号を受けて弁手段を操作し、制御系に又は制御
系から連通した流体通路の開度を調節する制御弁
に於いて、操作手段の出力軸にボールスクリユー
の回転軸を、回転力を受けると共に軸方向に変位
できる様に連結し、ボールスクリユーの往復動部
材に弁手段の弁軸を連結し、弾性手段でボールス
クリユーの回転軸を弁手段の閉弁方向に付勢し、
弾性手段の可動端にその圧縮変位と共に変位する
ように伝達部材を取り付け、操作手段に閉弁方向
の操作を停止する信号を送るリミツトスイツチを
制御手段に組み込むと共に、そのリミツトスイツ
チを伝達部材が所定量変位した位置で駆動するよ
うに取り付けた制御弁。1 The control means receives the target signal and the detection signal of the state of the control system and issues an operation signal, and the operation means receives this operation signal and operates the valve means to open a fluid passage communicating with or from the control system. In a control valve that adjusts the temperature, the rotating shaft of a ball screw is connected to the output shaft of the operating means so that it can receive rotational force and be displaced in the axial direction, and the reciprocating member of the ball screw is connected to the rotating shaft of the valve means. The valve shafts are connected, and the rotating shaft of the ball screw is urged in the valve closing direction of the valve means by an elastic means,
A transmission member is attached to the movable end of the elastic means so as to be displaced with the compressive displacement thereof, and a limit switch that sends a signal to the operating means to stop operation in the valve closing direction is incorporated into the control means, and the transmission member displaces the limit switch by a predetermined amount. The control valve is installed so that it is activated in the specified position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16140978A JPS5591004A (en) | 1978-12-28 | 1978-12-28 | Control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16140978A JPS5591004A (en) | 1978-12-28 | 1978-12-28 | Control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5591004A JPS5591004A (en) | 1980-07-10 |
| JPS6134581B2 true JPS6134581B2 (en) | 1986-08-08 |
Family
ID=15734535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16140978A Granted JPS5591004A (en) | 1978-12-28 | 1978-12-28 | Control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5591004A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230594A (en) * | 1986-03-28 | 1987-10-09 | 新明和工業株式会社 | Driving device for construction car, etc. |
| JPH0344193U (en) * | 1989-09-05 | 1991-04-24 | ||
| JPH053288U (en) * | 1991-06-28 | 1993-01-19 | 株式会社タダノ | Control device for vehicle-mounted crane |
| JP2000320711A (en) * | 1999-03-08 | 2000-11-24 | Saginomiya Seisakusho Inc | Electric control valve |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58177255A (en) * | 1982-04-09 | 1983-10-17 | Nippon Sheet Glass Co Ltd | Pressure control device |
| JPS59125413A (en) * | 1982-12-30 | 1984-07-19 | M Syst Giken:Kk | Servomechanism using alternating-current induction motor |
| JPS6084876U (en) * | 1983-11-15 | 1985-06-11 | 東芝機械株式会社 | Poppet lift amount control mechanism |
| JPS6334382A (en) * | 1986-07-25 | 1988-02-15 | Matsushita Electric Ind Co Ltd | Valve gear |
| JPS6345614A (en) * | 1986-08-12 | 1988-02-26 | Tlv Co Ltd | Pressure reducing valve |
| JPS6431411U (en) * | 1987-08-13 | 1989-02-27 | ||
| JPH0454500Y2 (en) * | 1987-08-13 | 1992-12-21 | ||
| JPH0298280U (en) * | 1989-01-24 | 1990-08-06 |
-
1978
- 1978-12-28 JP JP16140978A patent/JPS5591004A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230594A (en) * | 1986-03-28 | 1987-10-09 | 新明和工業株式会社 | Driving device for construction car, etc. |
| JPH0344193U (en) * | 1989-09-05 | 1991-04-24 | ||
| JPH053288U (en) * | 1991-06-28 | 1993-01-19 | 株式会社タダノ | Control device for vehicle-mounted crane |
| JP2000320711A (en) * | 1999-03-08 | 2000-11-24 | Saginomiya Seisakusho Inc | Electric control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5591004A (en) | 1980-07-10 |
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