JPH0314508B2 - - Google Patents
Info
- Publication number
- JPH0314508B2 JPH0314508B2 JP18563885A JP18563885A JPH0314508B2 JP H0314508 B2 JPH0314508 B2 JP H0314508B2 JP 18563885 A JP18563885 A JP 18563885A JP 18563885 A JP18563885 A JP 18563885A JP H0314508 B2 JPH0314508 B2 JP H0314508B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- motor
- valve member
- valve seat
- zero point
- 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 8
- 239000003973 paint Substances 0.000 description 8
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Nozzles (AREA)
Description
【発明の詳細な説明】
発明が属する技術分野
本発明は、弁座に対する弁部材の変位量を自動
的に制御することにより流体の流量を制御する弁
装置に関する。TECHNICAL FIELD The present invention relates to a valve device that controls the flow rate of fluid by automatically controlling the amount of displacement of a valve member with respect to a valve seat.
従来技術及びその問題点
従来用いられている、上述の如き自動的な流量
制御弁は、弁座と、弁座に着座した閉位置をとり
得るようにまた該弁座から離れる方向に可動なよ
うに設けられた弁部材と、弁部材を駆動するため
のモータと、該モータの出力軸の運動を弁部材に
伝達する伝動装置と、弁部材の位置を検知する位
置検出器と、弁部材の開度を与える命令信号に応
じモータを駆動する制御装置とを有する。制御装
置は、弁部材の開度を与える命令信号を受ける
と、この開度と前述した位置検出器よりの信号に
より決定される弁部材の現在の変位量との差か
ら、弁部材をさらに変位させる量を決定し、この
量に応じモータを駆動する。PRIOR ART AND PROBLEMS THEREOF Conventionally used automatic flow control valves, such as those described above, have a valve seat and a mechanism that is movable in a direction away from the valve seat so as to assume a closed position seated on the valve seat. a valve member provided in the valve member, a motor for driving the valve member, a transmission device for transmitting the motion of the output shaft of the motor to the valve member, a position detector for detecting the position of the valve member, and a motor for driving the valve member; and a control device that drives the motor in response to a command signal that provides an opening degree. When the control device receives a command signal giving the opening degree of the valve member, the control device further displaces the valve member based on the difference between this opening degree and the current displacement amount of the valve member determined by the signal from the position detector described above. The motor is driven according to this amount.
上述の如き弁装置においては、弁部材が弁座に
予め定めた適度な力で押圧された状態の位置を閉
位置とし、この閉位置に対応する位置検出器の出
力を制御装置においてゼロ点として扱うものであ
り、従つて、弁部材及び弁座が一定以上摩耗した
後は、弁部材を閉鎖位置に変位させたとき位置検
出器のゼロ点に相当する位置をとるため、流体の
漏洩が生じるという問題があつた。 In the above-mentioned valve device, the position where the valve member is pressed against the valve seat with a predetermined moderate force is defined as the closed position, and the output of the position detector corresponding to this closed position is set as the zero point in the control device. Therefore, after the valve member and valve seat wear out beyond a certain level, when the valve member is moved to the closed position, it assumes a position corresponding to the zero point of the position detector, causing fluid leakage. There was a problem.
問題を解決するための手段
本発明では、弁部材を駆動するモータのトルク
をそれに流れる電流により検知し、この値が所定
の値に達したことにより弁部材が弁座に所定の押
圧力で接している状態を知り、このときの位置検
出器の出力をゼロ点としこのゼロ点を基準にして
制御装置に加えられる弁部材開度の命令信号から
弁部材の変位量を決定するようになして、上述の
問題を解決した。Means for Solving the Problem In the present invention, the torque of the motor that drives the valve member is detected by the current flowing through it, and when this value reaches a predetermined value, the valve member contacts the valve seat with a predetermined pressing force. The output of the position detector at this time is set as the zero point, and the amount of displacement of the valve member is determined from the command signal for valve member opening applied to the control device based on this zero point. , solved the above problem.
実施例
第１図は本発明による流量制御弁装置の１つの
実施例を備えた塗装用吹付装置の縦断面図であ
り、塗料の噴出口１と、これに連通した塗料の供
給路２とを有している。供給路は塗料の供給源Ｓ
に連通している。噴出口１の周囲には空気口３が
形成され、これに連通して加圧空気の供給路４が
形成され、該供給路には空気コンプレツサＰが接
続されている。空気供給路からはパターン調整用
空気通路４ａが分岐しパターン調整用空気口３ａ
にまで延びており、この空気口３ａを出る空気で
噴霧のパターンが変わる。塗料用の供給路２内に
は塗料の流量を制御する流量制御弁装置５が設け
られ、これは噴出口１に近接して形成された弁座
６と、該弁座に近づきまたそれから離れるよう変
位可能に設けられた弁部材７とを有する。同様に
空気用の供給路４にも空気用の流量制御弁装置８
が設けられ、これは弁座９と弁部材１１とを有し
ている。Embodiment FIG. 1 is a longitudinal cross-sectional view of a paint spraying device equipped with an embodiment of the flow control valve device according to the present invention, showing a paint spout 1 and a paint supply path 2 communicating therewith. have. The supply path is the paint supply source S
is connected to. An air port 3 is formed around the jet nozzle 1, and a pressurized air supply path 4 is formed in communication with the air port 3, and an air compressor P is connected to the supply path. A pattern adjustment air passage 4a branches from the air supply path and is connected to a pattern adjustment air port 3a.
The spray pattern changes depending on the air exiting from this air port 3a. A flow rate control valve device 5 for controlling the flow rate of the paint is provided in the supply channel 2 for the paint, and it has a valve seat 6 formed close to the spout 1 and a valve seat 6 that approaches the valve seat and moves away from it. The valve member 7 is displaceably provided. Similarly, the air flow control valve device 8 is also connected to the air supply path 4.
is provided, which has a valve seat 9 and a valve member 11.
流量制御弁装置５はさらにサーボモータ１２も
有しその出力軸１３と弁部材７とが伝動装置１４
により接続されている。伝動装置１４は出力軸に
キー止めされたねじ部材１５及び該部材１５に形
成した外ねじと係合する内ねじを有したケーシン
グ１６を含み、該ケーシングは長手方向には可動
であるが回転は阻止されるようになつており、従
つて出力軸１３の回転によりケーシングは出力軸
の軸線方向に変位する。ケーシング１６内には止
めねじ１７がねじ込まれ、また該ケーシング内に
収容された弁部材７後端の拡大頭部１８との間に
圧縮ばね１９が介装されている。従つて、弁部材
７が弁座６に接した後モータ１２がさらに弁閉方
向に回転したときモータにかかる抵抗が急激に増
大せず、ケーシング１６はばね１９の力に抗し軸
線方向に移動し、モータにかかる抵抗は徐々に増
大する。モータ１２の出力軸１３にはさらに、出
力軸の一定回転角毎にパルスを生じるエンコーダ
２１に結合されている。後に説明するようにこの
エンコーダは弁部材７に対する位置検出器の一部
をなしている。 The flow control valve device 5 also has a servo motor 12 , whose output shaft 13 and the valve member 7 are connected to a transmission device 14 .
connected by. The transmission 14 includes a threaded member 15 keyed to the output shaft and a casing 16 having internal threads that engage external threads formed in the member 15, the casing being movable longitudinally but not rotationally. Therefore, rotation of the output shaft 13 displaces the casing in the axial direction of the output shaft. A set screw 17 is screwed into the casing 16, and a compression spring 19 is interposed between it and an enlarged head 18 at the rear end of the valve member 7 housed within the casing. Therefore, when the motor 12 further rotates in the valve closing direction after the valve member 7 contacts the valve seat 6, the resistance applied to the motor does not increase suddenly, and the casing 16 moves in the axial direction against the force of the spring 19. However, the resistance applied to the motor gradually increases. The output shaft 13 of the motor 12 is further coupled to an encoder 21 that generates a pulse at every constant rotation angle of the output shaft. As will be explained later, this encoder forms part of a position detector for the valve member 7.
他方の流量制御弁装置８も、サーボモータ２
２、伝動装置２３、及びエンコーダ２４を有して
おり、これらの構成及び機能はサーボモータ１
２、伝動装置１４、及びエンコーダ２１と同じで
あるため以下これらに関する説明は省略する。 The other flow control valve device 8 also has a servo motor 2.
2, a transmission device 23, and an encoder 24, and these configurations and functions are similar to those of the servo motor 1.
2. Since they are the same as the transmission device 14 and the encoder 21, explanations regarding these will be omitted below.
サーボモータ１２は、制御回路３１に接続して
おり、その回転を制御される。制御回路の詳細は
第２図に示す通りであり、以下この第２図を説明
しつつ流量制御弁装置の作動を説明する。尚、制
御回路の機能は弁装置５及び８について同じであ
るので、以下弁装置５に関してのみ説明する。 The servo motor 12 is connected to a control circuit 31, and its rotation is controlled. The details of the control circuit are as shown in FIG. 2, and the operation of the flow rate control valve device will be explained below with reference to FIG. Incidentally, since the function of the control circuit is the same for the valve devices 5 and 8, only the valve device 5 will be described below.
モータ１２に対する給電回路には、適宜に選定
した抵抗３２，３３を介して、基準電圧設定ライ
ン３４が接続され、また、モータ１２の一方の側
から消費電力検知ライン３５が引出され、このラ
インにはモータにかかるトルクに応じ変動する電
流に比例した信号が生じる。ライン３４，３５は
比較器３６に接続され、モータにかかるトルクが
予め定めた一定の値に達するとゼロ点設定信号を
ライン３７に出力する。ゼロ点設定信号はモータ
１２を停止させる命令信号にもなつており、制御
装置３８はこれを受けるとモータ１２への給電を
断つてモータを停止させる。エンコーダ２１から
のパルスはアツプダウンカウンタ３９によりカウ
ントされ該カウンタからはカウントされた値即ち
モータの現在の位置を表わす位置信号が制御装置
３８に送られる。このようにこの例ではエンコー
ダ２１とカウンタ３９が弁部材の位置を検知する
位置検出器を構成している。 A reference voltage setting line 34 is connected to the power supply circuit for the motor 12 via appropriately selected resistors 32 and 33, and a power consumption detection line 35 is drawn out from one side of the motor 12 and connected to this line. produces a signal proportional to the current that varies depending on the torque applied to the motor. Lines 34 and 35 are connected to a comparator 36, which outputs a zero point setting signal to line 37 when the torque applied to the motor reaches a predetermined constant value. The zero point setting signal also serves as a command signal to stop the motor 12, and upon receiving it, the control device 38 cuts off the power supply to the motor 12 and stops the motor. The pulses from the encoder 21 are counted by an up-down counter 39 which sends a position signal representing the counted value, ie, the current position of the motor, to the controller 38. Thus, in this example, the encoder 21 and the counter 39 constitute a position detector that detects the position of the valve member.
４１は入力装置であり、該装置からは弁部材７
の開度を決定するための信号が制御装置３８に与
えられる。例えば、本例の塗装用吹付装置が被塗
装物と吹付装置の間の距離を測定し、この測定値
に応じて塗料及び空気の流量を変える形式の場
合、入力装置は距離測定器であり、距離に応じた
信号を制御装置３８に与え、制御装置はこの距離
の信号により予めデータをもとに設定したプログ
ラムにより望ましい弁開度を算出する。入力装置
４１は、操作者が逐次要求する弁開度の信号を入
力するものでもよく、また予め弁開度の変化をプ
ログラムしておき継続的に弁開度の信号を制御装
置３８に与えるものでもよい。 41 is an input device, from which the valve member 7
A signal is given to the control device 38 to determine the opening degree of the opening. For example, if the painting spraying device of this example measures the distance between the object to be painted and the spraying device and changes the flow rate of paint and air according to this measured value, the input device is a distance measuring device, A signal corresponding to the distance is given to the control device 38, and the control device uses this distance signal to calculate a desired valve opening according to a program set in advance based on data. The input device 41 may be a device into which signals of the valve opening degree sequentially requested by the operator are input, or a device in which changes in the valve opening degree are programmed in advance and a signal of the valve opening degree is continuously given to the control device 38. But that's fine.
吹付装置のメインスイツチ（図示せず）をオン
にし作動を開始すると、制御装置はＤ／Ａコンバ
ータ４２及びパワーアンプ４３を介してモータ１
２を介閉方向に駆動する。弁部材７が弁座６に接
した後その押圧力が一定値まで上ると、即ちモー
タ１２のトルクが所定の位置に達すると比較器３
６の生ずるゼロ点設定信号によりモータが停止せ
しめられ、同時にカウンタ３９がクリアされ、従
つて弁部材７が弁座６に所定の圧力で接した状態
でカウンタがゼロになり位置検出器のゼロ点が設
定される。尚、このゼロ点の設定は制御装置内に
記憶装置を設け、ゼロ点設定信号を受けたときの
カウンタ３９の内容を記憶しこれをゼロ点とし以
降はその値を元に弁部材の変位を算出するように
してもよい。 When the main switch (not shown) of the spraying device is turned on and the operation starts, the control device controls the motor 1 via the D/A converter 42 and the power amplifier 43.
2 in the closing direction. After the valve member 7 contacts the valve seat 6, when the pressing force increases to a certain value, that is, when the torque of the motor 12 reaches a predetermined position, the comparator 3
The motor is stopped by the zero point setting signal generated by 6, and the counter 39 is cleared at the same time. Therefore, with the valve member 7 in contact with the valve seat 6 at a predetermined pressure, the counter becomes zero and the zero point of the position detector is reached. is set. For setting this zero point, a storage device is provided in the control device to memorize the contents of the counter 39 when the zero point setting signal is received, and from then on, the displacement of the valve member is determined based on this value. It may be calculated.
ゼロ点が設定された後は、制御装置は弁開度を
与える命令信号から、新たに設定されたゼロ点を
基に弁部材の変位量を算出し、これを基にＤ／Ａ
コンバータ及びパワーアンプ４３を介しモータ１
２を駆動する。即ち、弁及び弁部材の摩耗がない
状態において与えられる弁開度信号に応じ弁部材
がとる各位置に比較し、摩耗量ａが生じた後は同
じ弁開度信号を与えられた場合弁部材は対応する
非摩耗時位置より各々距離ａだけ弁閉鎖側とな
る。 After the zero point is set, the control device calculates the displacement amount of the valve member based on the newly set zero point from the command signal that gives the valve opening degree, and based on this, the D/A
Motor 1 via converter and power amplifier 43
Drive 2. That is, compared to each position that the valve member assumes in response to the valve opening signal given in a state where there is no wear on the valve and the valve member, after the amount of wear a occurs, the valve member will be in the same position when the same valve opening signal is given. are each on the valve closing side by a distance a from the corresponding non-wearing position.
尚、上述の例において、モータ１２はサーボモ
ータでありエンコーダにより所望の位置へ駆動制
御しているが、エンコーダを用いず、ステツプモ
ータにより直接回転位置を制御し所望位置で停止
させるようにしてもよい。この場合、ステツプモ
ータに入力したパルスをカウントする装置が位置
検出器となる。また抵抗３２，３３は可変抵抗に
すれば、ゼロ点における弁及び弁座の圧力を必要
に応じ選定することができる。また、ゼロ点の設
定は、メインスイツチの投入時に限らず、弁開度
をゼロにすべき命令が生じたごとに行つてもよ
く、あるいは操作者が必要時にゼロ点設定をすべ
き命令を入力するような構成としてもよい。 In the above example, the motor 12 is a servo motor and is controlled to drive to a desired position by an encoder. However, the rotational position may be directly controlled by a step motor and stopped at a desired position without using an encoder. good. In this case, a device that counts pulses input to the step motor serves as a position detector. Furthermore, if the resistors 32 and 33 are variable resistors, the pressure of the valve and valve seat at the zero point can be selected as required. Furthermore, the zero point setting is not limited to when the main switch is turned on, but may be set every time a command to set the valve opening to zero occurs, or the operator inputs a command to set the zero point when necessary. It is also possible to configure such a configuration.
発明の効果
上述のように、本発明による流量制御弁におい
ては、弁座及び弁部材が摩耗しても、漏洩が生じ
ず、またまた一定の弁開度を与えるべき命令に対
し、実際の開度が変わるということがなく、正確
な流量制御が可能である。Effects of the Invention As described above, in the flow control valve according to the present invention, even if the valve seat and valve member are worn out, no leakage occurs, and the actual opening is Accurate flow control is possible without any change in flow rate.
第１図は本発明による流量制御弁装置を組込ん
だ塗装用吹付装置の縦断面図；第２図は第１図に
示した装置の制御回路を示す図である。
６……弁座、７……弁部材、１２……モータ、
１４……伝動装置、１９……ばね、２１……位置
検出器の一部をなすエンコーダ、３８……制御装
置、３９……位置検出器の一部をなすカウンタ。
FIG. 1 is a longitudinal sectional view of a paint spraying device incorporating a flow control valve device according to the present invention; FIG. 2 is a diagram showing a control circuit of the device shown in FIG. 1. 6... Valve seat, 7... Valve member, 12... Motor,
14...Transmission device, 19...Spring, 21...Encoder forming part of the position detector, 38...Control device, 39...Counter forming part of the position detector.
Claims (1)
うにまた該弁座から離れる方向に可動なように設
けられた弁部材と、弁部材を駆動するためのモー
タと、該モータの出力軸の運動を前記弁部材に伝
達する伝動装置と、前記弁部材の位置を検知する
位置検出器と、弁部材の開度を与える命令信号に
応じ前記モータを駆動する制御装置とを有する流
量制御弁装置において、 前記制御装置を、前記モータのトルクが予め定
めた一定の値を越えたときの前記位置検出器の位
置情報をゼロ点として、該ゼロ点を基準に前記弁
部材の開度を与える命令信号に応じ前記モータの
駆動量を決定するようになしたことを特徴とする
流量制御弁装置。 ２ 特許請求の範囲第１項に記載の装置におい
て、前記伝動装置は、前記弁部材が弁座に接した
後に前記モータがさらに弁閉鎖方向に運動するこ
とを許容するよう設けられたばねを有しているこ
とを特徴とする流量制御弁装置。[Claims] 1. A valve seat, a valve member provided so as to be able to assume a closed position seated on the valve seat and movable in a direction away from the valve seat, and a motor for driving the valve member. a transmission device that transmits the motion of the output shaft of the motor to the valve member; a position detector that detects the position of the valve member; and a control that drives the motor in response to a command signal that determines the opening degree of the valve member. A flow control valve device having a flow control valve device, wherein the control device is configured such that the position information of the position detector when the torque of the motor exceeds a predetermined constant value is set as a zero point, and the A flow rate control valve device, characterized in that the amount of drive of the motor is determined in accordance with a command signal that gives an opening degree of a valve member. 2. The device according to claim 1, wherein the transmission device includes a spring provided to allow the motor to further move in the valve closing direction after the valve member contacts the valve seat. A flow control valve device characterized by:
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185638A JPS6245367A (en) | 1985-08-23 | 1985-08-23 | Flow control valve apparatus with variable valve closing position |
| DE8888116694T DE3675552D1 (en) | 1985-08-22 | 1986-08-06 | SPRAY GUN WITH AUTOMATIC CONTROL OF THE VALVE OPENING. |
| EP86110850A EP0212442B1 (en) | 1985-08-22 | 1986-08-06 | Spray gun with automatic valve opening control means |
| DE8686110850T DE3675460D1 (en) | 1985-08-22 | 1986-08-06 | SPRAY GUN WITH AUTOMATIC VALVE CONTROL. |
| EP88116694A EP0308993B1 (en) | 1985-08-22 | 1986-08-06 | Spray gun with automatic valve opening control means |
| US06/896,204 US4754923A (en) | 1985-08-22 | 1986-08-14 | Spray gun with automatic valve opening control means |
| KR1019860006905A KR930001503B1 (en) | 1985-08-22 | 1986-08-21 | Spray gun with automatic valve opening control means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60185638A JPS6245367A (en) | 1985-08-23 | 1985-08-23 | Flow control valve apparatus with variable valve closing position |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6245367A JPS6245367A (en) | 1987-02-27 |
| JPH0314508B2 true JPH0314508B2 (en) | 1991-02-26 |
Family
ID=16174271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60185638A Granted JPS6245367A (en) | 1985-08-22 | 1985-08-23 | Flow control valve apparatus with variable valve closing position |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6245367A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016131907A (en) * | 2015-01-16 | 2016-07-25 | アネスト岩田株式会社 | Spray gun |
-
1985
- 1985-08-23 JP JP60185638A patent/JPS6245367A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6245367A (en) | 1987-02-27 |
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