JPS60231083A - Flow control device - Google Patents
Flow control deviceInfo
- Publication number
- JPS60231083A JPS60231083A JP8643384A JP8643384A JPS60231083A JP S60231083 A JPS60231083 A JP S60231083A JP 8643384 A JP8643384 A JP 8643384A JP 8643384 A JP8643384 A JP 8643384A JP S60231083 A JPS60231083 A JP S60231083A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- proportional control
- control valve
- abnormality
- pulse input
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、通電量に応じて気体、液体等の流体流量を制
御する比例制御弁と、比例制御弁の上流側に流体を遮断
する閉止弁装置を設けた流量制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a proportional control valve that controls the flow rate of fluid such as gas or liquid according to the amount of current applied, and a shutoff valve device that shuts off fluid to the upstream side of the proportional control valve. The present invention relates to a flow rate control device provided with a.
従来例の構成とその問題点
第１図は従来の流量制御装置を示し、流体通路１を遮断
するだめの閉止弁装置２と閉止弁装置２の下流に設けら
れ通電量に応じて流体流量を制御する比例制御弁３及び
負荷温度信号ＦＢと設定温度信号Ｆｄを比較する比較器
４と比較器４の偏差信号に応じて比例制御弁３を制御す
る比例弁駆動回路５を有する。Structure of a conventional example and its problems Fig. 1 shows a conventional flow rate control device, which includes a shutoff valve device 2 that shuts off a fluid passage 1, and a shutoff valve device 2 that is installed downstream of the shutoff valve device 2 and controls the fluid flow rate according to the amount of current. It has a proportional control valve 3 to control, a comparator 4 to compare the load temperature signal FB and a set temperature signal Fd, and a proportional valve drive circuit 5 to control the proportional control valve 3 according to the deviation signal of the comparator 4.
比例制御弁３は弁座６と弁体７及び弁体７と共動し流体
入口圧を受けて動作するダイヤフラム８と弁体７を弁体
６に押付ける方向に作用する圧縮バネ９から構成される
流量制御部１ａと、コイル１０とヨーク１１及びコイル
１０の中央部を貫通して設けた摺動パイプ１２と摺動パ
イプ１２内を上下動可能に設けられ、コイル１０への通
電により電磁力を受け弁体７を下方に変位させるプラン
ジャ１３から構成される駆動部２ａとを有する。The proportional control valve 3 is composed of a valve seat 6, a valve body 7, a diaphragm 8 that operates together with the valve body 7 and operates in response to fluid inlet pressure, and a compression spring 9 that acts in a direction to press the valve body 7 against the valve body 6. A sliding pipe 12 is provided to penetrate the coil 10, the yoke 11, and the center of the coil 10, and the sliding pipe 12 is movable up and down. The driving portion 2a includes a plunger 13 that receives force and displaces the valve body 7 downward.
通電されると閉止弁装置２が開となり、甘だ比例弁駆動
回路５によってコイル１０に通電がなされプランジャ１
３は圧縮バネ９の閉弁力に打勝って弁体７を下方に変位
させ、流体は閉止弁装置２をへて比例制御弁３の出口か
ら放出される。例えば燃料ガスを制御する場合比例制御
弁３によって制御されたガスはバーナーへと流入して燃
焼し熱交換器（いずれも図示せず）によって水を湯にか
える。その湯温は負荷温度信号Ｆｓ として検出され、
設定温度信号Ｆｄと比較器４で比較され偏差信号に応じ
て比例制御弁３が制御される。つ捷り設定温度信号Ｆｄ
となるよう比例制御弁３によって燃焼量が制御されるわ
けである。When energized, the shutoff valve device 2 is opened, and the coil 10 is energized by the proportional valve drive circuit 5 to close the plunger 1.
3 overcomes the valve closing force of the compression spring 9 and displaces the valve body 7 downward, and the fluid passes through the closing valve device 2 and is discharged from the outlet of the proportional control valve 3. For example, when controlling fuel gas, the gas controlled by the proportional control valve 3 flows into a burner, burns it, and converts water into hot water by a heat exchanger (none of which is shown). The hot water temperature is detected as a load temperature signal Fs,
The set temperature signal Fd is compared with the comparator 4, and the proportional control valve 3 is controlled according to the deviation signal. Threading setting temperature signal Fd
The combustion amount is controlled by the proportional control valve 3 so that.
ところでこの種の流量制御装置の場合、駆動部１ａによ
って弁体７を変位させるため、プランジャ１３がスムー
ズに上下動する必要があり、もし万一プランジャ１３が
摺動ノｆイブ１２と摩擦しロックされてしまうと通電し
ても開弁じない、もしくは逆に通電を解除しても流体が
流出する場合が発生し、特に燃料ガスの制御に際しては
器具破損、爆発等の重大な事故に至る危険があった。By the way, in the case of this type of flow control device, since the valve body 7 is displaced by the drive unit 1a, the plunger 13 needs to move up and down smoothly, and if the plunger 13 should rub against the sliding knob 12 and lock If this happens, the valve may not open even when energized, or conversely, fluid may leak out even when energization is removed. Especially when controlling fuel gas, there is a risk of equipment damage, explosion, and other serious accidents. there were.
発明の目的
本発明は、上記従来の問題点に鑑み、比例制御弁に動作
異常が発生した時上流側に設けた閉止弁装置を閉保持し
安全、信頼性の向上を図った流量制御装置を提供するこ
とを目的とする。Purpose of the Invention In view of the above-mentioned conventional problems, the present invention provides a flow rate control device that improves safety and reliability by keeping a shutoff valve device provided on the upstream side closed when an abnormality occurs in the proportional control valve. The purpose is to provide.
発明の構成
この目的を達成するため本発明による流量制御装置は通
電量に応じて流体流量を制御する比例制御弁と、この比
例制御弁に装備された弁開度検出器と、前記比例制御弁
の上流に設けた閉止弁装置と比例弁駆動回路を有すると
ともに、前記比例制御弁への通電初期に前記閉止弁装置
よりもさらに比例制御弁にパルス入力を印加するパルス
入力手段と、そのパルス入力の有無とそれに応じて得ら
れる前記弁開度検出器の信号との組合せにより比例制御
弁の異常を判別する異常判別手段を有し、正常時には前
記閉止弁装置を開として比例制御動作を行ない、異常時
は閉止弁装置を閉保持する安全回路を設けて構成したも
のである。Structure of the Invention In order to achieve this object, a flow rate control device according to the present invention includes a proportional control valve that controls a fluid flow rate according to the amount of energization, a valve opening degree detector equipped on this proportional control valve, and a proportional control valve. pulse input means, which has a shutoff valve device and a proportional valve drive circuit provided upstream of the proportional control valve, and applies a pulse input to the proportional control valve further than the shutoff valve device at the initial stage of energization of the proportional control valve; has an abnormality determining means for determining an abnormality in the proportional control valve based on a combination of the presence or absence of the valve opening and a signal from the valve opening degree detector obtained accordingly, and when normal, the shutoff valve device is opened to perform a proportional control operation; It is constructed with a safety circuit that keeps the shutoff valve device closed in the event of an abnormality.
この構成により、上流側に設けられた閉止弁装置が閉の
状態で比例制御弁にパルス入力が印加され、パルス入力
の有無とそれに応じて得られる弁開度検出器の信号の組
合せにより比例制御弁の異常を判別し、異常時には閉止
弁装置を閉保持することにより信頼性向上が図られる。With this configuration, a pulse input is applied to the proportional control valve while the shut-off valve device installed on the upstream side is closed, and proportional control is performed by a combination of the presence or absence of the pulse input and the signal from the valve opening detector obtained accordingly. Reliability can be improved by determining whether there is an abnormality in the valve and keeping the shutoff valve device closed in the event of an abnormality.
実施例の説明 以下本発明の実施例を図面とともに説明する。Description of examples Embodiments of the present invention will be described below with reference to the drawings.
第２図は本発明による流量制御装置の構成図を示し、１
４は弁体７と共動するプランジャ１３の上下動に応じて
接点が０Ｎ−ＯＦＦするマイクロスイッチ等からなる弁
開度検出器であり取付は板１５によってヨーク１１の上
面部に固定されている。FIG. 2 shows a configuration diagram of a flow rate control device according to the present invention, 1
Reference numeral 4 designates a valve opening detector consisting of a microswitch, etc., whose contacts turn ON/OFF in accordance with the vertical movement of a plunger 13 that moves together with the valve body 7, and is fixed to the upper surface of the yoke 11 by a plate 15. .
弁開度検出器１４は弁閉止時はＯＦＦ、！た弁全開時は
ＯＮとなるよう設定されておりその信号は安全回路１６
ａＫ入力される。第３図は安全回路１６ａのブロック図
を示し、１７は電源投入直後、すなわち比例制御弁３へ
の通電初期に所定時間安全回路ｌｅａを動作させるタイ
マー回路であり、所定時間後にパルス入力回路１８を動
作させ比例弁駆動回路５をへてコイル１０にパルス入力
を印加する。１９は比例弁駆動回路５からの出力信号を
検出する比例弁信号検出回路であり２０は弁開度検出器
１４の信号を検出する弁開度検出回路である。The valve opening detector 14 is OFF when the valve is closed! The signal is set to be ON when the valve is fully open, and the signal is sent to the safety circuit 16.
aK is input. FIG. 3 shows a block diagram of the safety circuit 16a, and 17 is a timer circuit that operates the safety circuit lea for a predetermined time immediately after the power is turned on, that is, at the beginning of energization to the proportional control valve 3, and after a predetermined time, the pulse input circuit 18 is activated. A pulse input is applied to the coil 10 through the proportional valve drive circuit 5. 19 is a proportional valve signal detection circuit that detects the output signal from the proportional valve drive circuit 5, and 20 is a valve opening detection circuit that detects the signal from the valve opening detector 14.
なおここでパルス入力回路１８の出力レベルは比例制御
弁３の弁体７を圧縮バネ９の閉弁力に打勝って全開する
にたりる出力レベルとする。つまり、パルス入力回路１
８の動作によって弁開度検出器１４がＯＮするよう設定
される。Here, the output level of the pulse input circuit 18 is set to such an output level that the valve body 7 of the proportional control valve 3 is fully opened by overcoming the valve closing force of the compression spring 9. In other words, pulse input circuit 1
8, the valve opening degree detector 14 is set to turn on.
判別回路２１は比例弁信号検出回路１９と弁開度検出回
路２０からの信号の組合せにより比例制御弁３の異常を
検出し、正常な組合せの場合は電磁弁駆動回路２２を動
作させて閉止弁装置２を開とし、また異常時は電磁弁駆
動回路２２を動作させず報知回路２３を動作させブザー
、ＬＥＤ等（図示せず）により異常を報知する。その他
は第１図従来例と同じであり同一記号を付して説明を省
略する。The discrimination circuit 21 detects an abnormality in the proportional control valve 3 based on a combination of signals from the proportional valve signal detection circuit 19 and the valve opening detection circuit 20, and if the combination is normal, operates the electromagnetic valve drive circuit 22 to close the valve. The device 2 is opened, and when an abnormality occurs, the electromagnetic valve drive circuit 22 is not operated, but the notification circuit 23 is operated to notify the abnormality using a buzzer, LED, etc. (not shown). The other parts are the same as those of the conventional example shown in FIG. 1, so the same symbols are given and the explanation is omitted.
上記構成において電源が投入されるとタイマー回路１７
が動作し所定時間安全回路１６ａが動作する。第４図は
比例弁信号検出回路１９と弁開度検出回路２０の出力レ
ベル波形図を示し、安全回路１６ａが動作する所定時間
Ｔ内においてｔｌはパルス入力回路１８が動作しない時
間でありｔ２は動作してコイル１０に通電される時間で
ある。In the above configuration, when the power is turned on, the timer circuit 17
operates, and the safety circuit 16a operates for a predetermined time. FIG. 4 shows output level waveform diagrams of the proportional valve signal detection circuit 19 and the valve opening detection circuit 20, where tl is the time during which the pulse input circuit 18 does not operate within the predetermined time T during which the safety circuit 16a operates, and t2 is the time when the pulse input circuit 18 does not operate. This is the time during which the coil 10 is activated and energized.
正常時は第４図（、）に示すようにコイル１０へ通電さ
れない状態では弁開度検出器１４の信号はなく、パルス
入力回路１８が動作しコイル１０に通電されるとプラン
ジャ１３は下方に変位し弁開度検出器１４はＯＮする。Under normal conditions, as shown in FIG. 4(,), when the coil 10 is not energized, there is no signal from the valve opening detector 14, and when the pulse input circuit 18 operates and the coil 10 is energized, the plunger 13 moves downward. The valve opening degree detector 14 is turned ON.
この信号は判別回路２１に入力され正常判別されて閉止
弁装置２は閉保持され流体は比例制御弁３へ流入し比較
器４の偏差信号に応じて流量が制御される。This signal is input to the determination circuit 21 and determined to be normal, the shutoff valve device 2 is held closed, the fluid flows into the proportional control valve 3, and the flow rate is controlled in accordance with the deviation signal from the comparator 4.
一方プランジャ１３と摺動パイプ１２の摺動面に異物が
混入したり、また長期使用によるプランジャ１３からの
発錆等によりプランジャ１Ｇがロックされて動作不能に
なった場合、もしくはコイル１０が断線した場合等の異
常時には、コイル１０への通電がない状態で弁開度検出
Ｍ１４７＞すＮとなったり、また逆にコイル１０に通電
されているにもかかわらす弁開度検出器１４がＯＦＦ状
態となるため判別回路２１は異常判別して閉止弁装置２
を閉保持するとともに報知する。なお異常判別の誤動作
を防ぐため、検出時間Ｔを１回だけでなく複数回繰返し
、その後に異常判別するようにしても良い。On the other hand, if the plunger 1G is locked and becomes inoperable due to foreign matter getting into the sliding surfaces of the plunger 13 and the sliding pipe 12, or rusting from the plunger 13 due to long-term use, or if the coil 10 is disconnected. In the event of an abnormality such as when the coil 10 is not energized, the valve opening detection M147 becomes N, or conversely, even though the coil 10 is energized, the valve opening detector 14 is in the OFF state. Therefore, the determination circuit 21 determines the abnormality and shuts off the shutoff valve device 2.
is held closed and alerted. Note that in order to prevent malfunctions in abnormality determination, the detection time T may be repeated not only once but a plurality of times, and then abnormality determination may be performed.
以上のように本実施例によれば、プランジャ１３の動作
不能を比例制御弁３内に流体が流入しない間に検出し、
正常時は上流側に設けた閉止弁装置２を開として通常の
比例制御動作を行ない、異常時には閉止弁装置２を閉保
持して流体を比例制御弁３に至らしめないとともに異常
を報知するため、安全、信頼性が向上する。As described above, according to this embodiment, the inoperability of the plunger 13 is detected while no fluid flows into the proportional control valve 3,
In normal times, the shut-off valve device 2 provided on the upstream side is opened to perform normal proportional control operation, and in the event of an abnormality, the shut-off valve device 2 is kept closed to prevent fluid from reaching the proportional control valve 3 and to notify the abnormality. , safety and reliability are improved.
また比例制御弁３の弁座６と弁体７間に弾性体（図示せ
ず）を設は比例制御弁３に閉止機能を付加する場合弁体
７と弁座６の粘着及び底着によって開弁不能となる場合
があったが、本実施例では流体が比例制御弁３内に流入
する前にパルス入力回路１８によってコイル１０にパル
ス入力が付加されるため、前記粘着及び嵌着を解除する
程度の電磁力が得られるパルヌ入カ信号に設定すれば弁
座６と弁体７の粘着、嵌着を防止することができる。In addition, when adding a closing function to the proportional control valve 3 by installing an elastic body (not shown) between the valve seat 6 and the valve body 7 of the proportional control valve 3, it is necessary to install an elastic body (not shown) between the valve seat 6 and the valve body 7. However, in this embodiment, the pulse input circuit 18 applies a pulse input to the coil 10 before the fluid flows into the proportional control valve 3, so the adhesion and fitting are released. By setting the PALNU input signal to obtain a certain level of electromagnetic force, it is possible to prevent the valve seat 6 and the valve body 7 from sticking or fitting together.
発明の詳細
な説明したように本発明の流量制御装置は、比例制御弁
に弁動作状態を検出する弁開度検出器を設けるとともに
比例制御弁上流側に閉止弁装置を設け、さらに比例制御
弁への通電初期、すなわち閉止弁装置を閉弁した状態で
比例制御弁にパルス入力を印加し、そのパルス入力の有
無とそれに応じて得られる弁開度検出器の信号との組合
せにより比例制御弁の異常判別を行ない、正常時は閉止
弁装置を開として通常の比例制御動作に移行し、異常時
は閉止弁装置を閉弁保持する安全回路を設けて構成した
ものである。DETAILED DESCRIPTION OF THE INVENTION As described in detail, the flow control device of the present invention includes a proportional control valve provided with a valve opening detector for detecting the valve operating state, a shutoff valve device provided on the upstream side of the proportional control valve, and a proportional control valve At the initial stage of energization, that is, when the shutoff valve device is closed, a pulse input is applied to the proportional control valve, and the proportional control valve A safety circuit is provided to determine whether there is an abnormality, and to open the shutoff valve device and proceed to normal proportional control operation in normal times, and to keep the shutoff valve device closed in times of abnormality.
したがって器具使用毎に比例制御弁の動作チェックを行
ない、動作異常の場合は流体を比例制御弁内に流入させ
ないため、燃料ガスを制御する場谷においても爆発等の
事故が未然に防がれ１．安全性信頼性が向上する。さら
に器具使用前に比例制御弁に流体を流さない状態でパル
ス入力を印加し、空運転を行なうため比例制御弁駆動部
の異物混入等による引かかり、もしくは弁体と弁座の当
接部での粘着及び底着などの外乱を解消した後比例制御
動作に移行できるため流量制御特性が安定する。Therefore, the operation of the proportional control valve is checked every time the device is used, and if there is an abnormality in operation, fluid is not allowed to flow into the proportional control valve. This prevents accidents such as explosions even in places where fuel gas is controlled. ．． Improves safety and reliability. Furthermore, before using the device, a pulse input is applied to the proportional control valve without fluid flowing to it, so that the proportional control valve is run dry. After eliminating disturbances such as adhesion and bottoming, the flow control characteristics can be stabilized because the proportional control operation can be started.
などの効果を有するものである。It has the following effects.
第１図は従来の流量制御装置の構成図、第２図は本発明
の一実施例を示す流量制御装置の構成図、第３図は同装
置における安全回路のブロック図、第４図は同比例弁信
号検出回路と弁開度検出回路の出力波形図である。
２・・閉止弁装置、３・・・比例制御弁、５・・・比例
弁駆動回路、１４・・・弁開度検出器、１６ａ・・・安
全回路、１８・・・パルス入力回路、２１・・判別回路
。
代理人の氏名 弁理士 中 尾 敏 男 他１名第１図
焦
第２図
３図
！６の
第４図
し）正常
時間□
（ｂ）異常
待閲□Fig. 1 is a block diagram of a conventional flow control device, Fig. 2 is a block diagram of a flow control device showing an embodiment of the present invention, Fig. 3 is a block diagram of a safety circuit in the same device, and Fig. 4 is a block diagram of the same. FIG. 3 is an output waveform diagram of a proportional valve signal detection circuit and a valve opening degree detection circuit. 2... Closing valve device, 3... Proportional control valve, 5... Proportional valve drive circuit, 14... Valve opening degree detector, 16a... Safety circuit, 18... Pulse input circuit, 21 ...Discrimination circuit. Name of agent Patent attorney Toshio Nakao and 1 other person Figure 1 Jiao Figure 2 Figure 3! 6, Figure 4) Normal time □ (b) Abnormal waiting time □
Claims (1)
比例制御弁に装備され弁の動作状態を検出する弁開度検
出器と、前記比例制御弁の上流側に設けた閉止弁装置と
、比例弁駆動回路を有するとともに、前記比例制御弁へ
の通電初期に前記閉止弁装置を閉弁した状態で比例制御
弁にパルス入力を印加するパルス入力手段と、そのパル
ス入力の有無とそれに応じて得られる前記弁開度検出器
の信号との組合せにより比例制御弁の異常を判別する異
常判別手段を有し、正常時は前記閉止弁装置を開として
比例制御動作を行ない、異常時は閉止弁装置を閉保持す
る安全回路を設けた流量制御装置。A proportional control valve that controls a fluid flow rate according to the amount of energization, a valve opening detector that is installed on the proportional control valve and detects the operating state of the valve, and a shutoff valve device provided on the upstream side of the proportional control valve. , a pulse input means having a proportional valve drive circuit and applying a pulse input to the proportional control valve with the shutoff valve device closed at the initial stage of energization to the proportional control valve, and whether or not the pulse input is present and responsive thereto; It has an abnormality determination means for determining an abnormality in the proportional control valve based on a combination with a signal from the valve opening degree detector obtained from the valve opening, and when normal, the shutoff valve device is opened and a proportional control operation is performed, and when abnormality, it is closed. A flow control device equipped with a safety circuit that keeps the valve device closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8643384A JPS60231083A (en) | 1984-04-27 | 1984-04-27 | Flow control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8643384A JPS60231083A (en) | 1984-04-27 | 1984-04-27 | Flow control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60231083A true JPS60231083A (en) | 1985-11-16 |
| JPH0258513B2 JPH0258513B2 (en) | 1990-12-07 |
Family
ID=13886771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8643384A Granted JPS60231083A (en) | 1984-04-27 | 1984-04-27 | Flow control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60231083A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63156916A (en) * | 1986-12-19 | 1988-06-30 | Matsushita Electric Ind Co Ltd | Burning apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06307066A (en) * | 1993-04-20 | 1994-11-01 | Kobe Steel Ltd | Soundproof panel |
-
1984
- 1984-04-27 JP JP8643384A patent/JPS60231083A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63156916A (en) * | 1986-12-19 | 1988-06-30 | Matsushita Electric Ind Co Ltd | Burning apparatus |
| JPH0794890B2 (en) * | 1986-12-19 | 1995-10-11 | 松下電器産業株式会社 | Burning appliances |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0258513B2 (en) | 1990-12-07 |
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