JPH01269768A - Electromagnetic selector valve - Google Patents
Electromagnetic selector valveInfo
- Publication number
- JPH01269768A JPH01269768A JP9949588A JP9949588A JPH01269768A JP H01269768 A JPH01269768 A JP H01269768A JP 9949588 A JP9949588 A JP 9949588A JP 9949588 A JP9949588 A JP 9949588A JP H01269768 A JPH01269768 A JP H01269768A
- Authority
- JP
- Japan
- Prior art keywords
- coil
- magnetic sensor
- output
- switching valve
- electromagnetic switching
- 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
- 230000005291 magnetic effect Effects 0.000 claims abstract description 72
- 238000001514 detection method Methods 0.000 claims description 22
- 230000005284 excitation Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Magnetically Actuated Valves (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は例えば弁本体に併設されたソレノイドコイル
が直流励磁されて、流体の流路を切換えるスプールを作
動させる電磁切換弁、特に可動鉄心の作動に基づいた電
磁切換弁の作動検出に関する。[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to electromagnetic switching valves, in particular movable iron cores, in which, for example, a solenoid coil attached to a valve body is excited with direct current to operate a spool that switches a fluid flow path. This invention relates to detection of operation of an electromagnetic switching valve based on operation.
［従来の技術］
第６図は例えば従来の電磁切換弁の断面図を示し、
１は流体の流路を切換える弁本体、２は外部から電気信
号を供給するケーブルが接続される電装箱、旦は合成樹
脂材のケースに収納されるソレノイド部、４はコイル、
５は透磁性材料よりなるコイルフレーム、８は端子板、
９はプラグ、１０はレセプタタル、１１はコイル４の励
磁に応動し流路を切換えるスプール、１２はスプリング
、１３は固定鉄心、１４はスプール１１に連結されたブ
ツシュピン、１５はコイル４の励磁により作動する可動
鉄心、１６は表示灯、２５はスプール１１に押圧されて
動作するマイクロスイッチ、２６は弁本体１にｆＪ−ｆ
Ｋ２されたケースである。[Prior Art] Fig. 6 shows, for example, a cross-sectional view of a conventional electromagnetic switching valve, in which 1 is a valve body that switches a fluid flow path, 2 is an electrical box to which a cable for supplying electrical signals from the outside is connected, and 4 is a solenoid part housed in a synthetic resin case, 4 is a coil,
5 is a coil frame made of magnetically permeable material, 8 is a terminal plate,
9 is a plug, 10 is a receptor, 11 is a spool that switches the flow path in response to the excitation of the coil 4, 12 is a spring, 13 is a fixed iron core, 14 is a bushing pin connected to the spool 11, and 15 is activated by the excitation of the coil 4. 16 is an indicator light, 25 is a micro switch that operates when pressed by the spool 11, and 26 is a valve body 1 with fJ-f.
This is a case of K2.
従来の電磁切換弁は上記のように溝底され、電磁切換弁
は弁本体１に併設されたソレノイド部旦のコイル４を直
流励磁するため、外部からのケーブルが弁本体１に載置
された電装箱２の端子板８に接続され、プラグ９ならび
にレセプタクル１０を経てコイル４へ給電される。コイ
ル４が直流励磁されると可動鉄心１５ならびにこれに連
結されるスプール１１が作動する。Conventional electromagnetic switching valves have a groove bottom as described above, and in order to excite the coil 4 of the solenoid section attached to the valve body 1 with direct current, an external cable is placed on the valve body 1. It is connected to the terminal board 8 of the electrical equipment box 2, and power is supplied to the coil 4 via the plug 9 and receptacle 10. When the coil 4 is DC excited, the movable iron core 15 and the spool 11 connected thereto are activated.
従来電磁切換弁の作動表示は、ソレノイド部品のコイル
４へ印加される直流電圧を端子板８に表示灯１６を設け
て行われている。然し上記方法では端子板８に直流電圧
が印加されても、実際にコイル４が励磁され電磁切換弁
が所定の作動をすることが確認できない。Conventionally, the operation of an electromagnetic switching valve is indicated by providing an indicator light 16 on a terminal plate 8 for direct current voltage applied to a coil 4 of a solenoid component. However, in the above method, even if a DC voltage is applied to the terminal plate 8, it cannot be confirmed that the coil 4 is actually excited and the electromagnetic switching valve performs a predetermined operation.
また、電磁切換弁のコイル４へ直流電圧を印加したとき
の作動の確認は、弁本体１の一方のソレノイド部品に変
わりマイクロスイッチ２５とカバー２６を儲け、スプー
ル１１の端にブツシュピン１４を連結してマイクロスイ
ッチ２５と係合させる。Also, to check the operation when DC voltage is applied to the coil 4 of the electromagnetic switching valve, replace one solenoid part of the valve body 1 with a microswitch 25 and a cover 26, and connect the bushing pin 14 to the end of the spool 11. to engage the microswitch 25.
］イル４が直流励磁されたとき発生する直流磁界により
可動鉄心１５に吸引力が作用し、スプール１１が作動し
て連結されたブツシュビン１４はマイクロスイッチ２５
を押圧して作動ざぜ、応動した接点信号を電装箱２へ転
送し表示灯１６による作動表示が行われている。] When the coil 4 is DC excited, an attractive force acts on the movable iron core 15 due to the DC magnetic field generated, and the spool 11 is actuated, and the connected bushbin 14 is activated by the micro switch 25.
is activated by pressing , the responsive contact signal is transferred to the electrical equipment box 2, and the indicator light 16 indicates the activation.
コイル４の励磁を止めるとスプール１１はスプリング１
２のばね力により復帰する。When the excitation of the coil 4 is stopped, the spool 11 becomes the spring 1
It is restored by the spring force of step 2.
上記動作においてはスプール１１とマイクロスイッチ２
５の作動に要するストロークは整合させなければならな
い。In the above operation, spool 11 and micro switch 2
The strokes required for actuation of 5 must be matched.
［発明が解決しようとする課題］
上記のような従来の電磁切換弁ては、その作動表示はソ
レノイド部品のコイル４へ印ｊＤされる直流励磁電圧が
、端子板８に設けられた表示灯１６の点灯により行われ
ている。[Problems to be Solved by the Invention] In the conventional electromagnetic switching valve as described above, its operation is indicated by the DC excitation voltage applied to the coil 4 of the solenoid component by the indicator light 16 provided on the terminal board 8. This is done by lighting up.
然し端子板８から供給される電圧は配線過程における接
続不良やコイル４の断線などによりコイル４を正しく励
磁できず、また作動油中へ混入した異物によりスプール
１１がスティックしてスプール１１が正しく作動しない
ことがある。However, the voltage supplied from the terminal board 8 may not be able to properly excite the coil 4 due to poor connections or disconnections in the coil 4 during the wiring process, and the spool 11 may become stuck due to foreign matter mixed into the hydraulic oil, preventing the spool 11 from operating properly. There are things I don't do.
弁本体１にマイクロスイッチ２５を（７７、設すると、
電磁切換弁の寸法が大きくなり設置のための占有面積が
増加する。When the micro switch 25 (77) is installed in the valve body 1,
As the size of the electromagnetic switching valve increases, the area it occupies for installation increases.
また、スプール１１はマイクロスイッチ２５と機械的に
係合して押圧するための充分なトルクならびにストロー
クの整合性が要求されて電磁切換弁の作動が影響を受け
る。Furthermore, the spool 11 is required to have sufficient torque and stroke consistency to mechanically engage and press the microswitch 25, which affects the operation of the electromagnetic switching valve.
更に、ソレノイド部品は弁本体１の一方のみに取付けら
れるので、電磁切換弁の切換制御は３位置から２位置と
制限されるという問題点があった。Furthermore, since the solenoid component is attached to only one side of the valve body 1, there is a problem in that switching control of the electromagnetic switching valve is limited from three positions to two positions.
この発明はかかる問題点を解決するためになされたもの
で、電磁切換弁は本来の作動ならびに寸法に影響をうけ
ることなく、電磁切換弁の可動鉄心の作動による直流磁
界の変化に感応する磁気センサを利用して、所定の切換
動作が正しく検出できる電磁切換弁を得ることを目的と
する。This invention was made to solve this problem, and the electromagnetic switching valve is a magnetic sensor that is sensitive to changes in the DC magnetic field caused by the operation of the movable core of the electromagnetic switching valve, without being affected by its original operation and dimensions. The purpose of the present invention is to obtain an electromagnetic switching valve that can correctly detect a predetermined switching operation by utilizing the following.
［課題を解決するための手段］
この発明に係る電磁切換弁は、ソレノイド部のコイルに
印加された励磁電圧により、コイルが発生する直流磁界
に感応する磁気センサと、磁気センサ出力により可動鉄
心の所定位置を検知する検出回路を設けたものである。[Means for Solving the Problems] The electromagnetic switching valve according to the present invention includes a magnetic sensor that is sensitive to a DC magnetic field generated by the coil by an excitation voltage applied to the coil of a solenoid portion, and a movable iron core that is activated by the output of the magnetic sensor. A detection circuit is provided to detect a predetermined position.
［作用］
この発明においては、電磁切換弁の作動に係るソレノイ
ド部のコイルに近接して磁気センサをまた磁気センサ出
力に検出回路を設けたので、励磁されたコイルの発生す
る直流磁界に感応して磁気センサが出力を発生し、可動
鉄心の所定作動位置における磁気センサ出力信号が検出
回路にて検知できるので、可動鉄心の作動が正しく検出
される検出回路出力を報知することにより、電磁切換弁
の正しい動作が把握できる。[Function] In this invention, since a magnetic sensor is provided close to the coil of the solenoid part related to the operation of the electromagnetic switching valve, and a detection circuit is provided at the magnetic sensor output, the sensor is sensitive to the DC magnetic field generated by the excited coil. The magnetic sensor generates an output, and the magnetic sensor output signal at a predetermined operating position of the movable core can be detected by the detection circuit, so by notifying the detection circuit output that correctly detects the operation of the movable core, the electromagnetic switching valve The correct behavior can be understood.
上記作用は電磁切換弁の可動部に接触することなく非接
触にて行えるのでその作動および寸法に影響を与えない
。The above action can be performed in a non-contact manner without contacting the movable parts of the electromagnetic switching valve, so that its operation and dimensions are not affected.
また磁気センサは差動出力を発生するので周囲湿度が変
化しても、電磁切換弁の正しい作動データが１与られる
。Furthermore, since the magnetic sensor generates a differential output, correct operating data for the electromagnetic switching valve is provided even if the ambient humidity changes.
［実施例］
この発明の一実施例を添付図面を参照して詳細に説明す
る、
第１図はこの発明の一実施例を示す断面図であり、
図において、１．２、旦、４．５．８．９．１０．１１
．１２．１３．１４．１５．１６は上記従来の電磁切換
弁と同一であり、６はコイル４が直流励磁されて可動鉄
心１５の作動による直流磁界の変化に感応する磁気セン
サ、７は磁気センサ６の出力信号を検知する検出回路を
示している。[Embodiment] An embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view showing an embodiment of the invention. 5.8.9.10.11
．． 12, 13, 14, 15, and 16 are the same as the above-mentioned conventional electromagnetic switching valve, 6 is a magnetic sensor that is sensitive to changes in the DC magnetic field caused by the actuation of the movable core 15 when the coil 4 is DC-excited, and 7 is a magnetic sensor. 6 shows a detection circuit that detects the output signal of No. 6.
上記のように構成されたＮ磁切換弁においては、弁本体
１の側部にはソレノイド部品が併設され、また上部には
電装箱２が載置されている。In the N-magnetic switching valve configured as described above, a solenoid component is provided on the side of the valve body 1, and an electrical equipment box 2 is placed on the top.
電磁切換弁の作動を制御する直流電源は、外部からケー
ブルを介して電装箱２の端子板８へ給電され、更に端子
板８からプラグ９およびレセプタクル１０を経てソレノ
イド部品内の中空円筒状をなすコイル４を直流励磁する
。コイル４の中空部の一部に固定鉄心１３が設けられ、
これと同心状に可動自在をなす可動鉄心１５が配設され
ている。可動鉄心１５の一端はブシュピン１４を介して
弁本体１内のスプール１１へ連結され、スプール１１は
通常スプリング１２のばね力によりノーマル位置に配置
されている。The DC power supply that controls the operation of the electromagnetic switching valve is supplied from the outside via a cable to the terminal board 8 of the electrical equipment box 2, and then from the terminal board 8 through a plug 9 and a receptacle 10 to form a hollow cylinder inside the solenoid component. The coil 4 is excited with direct current. A fixed core 13 is provided in a part of the hollow part of the coil 4,
A movable core 15 is disposed concentrically with the movable core 15 so as to be freely movable. One end of the movable iron core 15 is connected to a spool 11 in the valve body 1 via a bushing pin 14, and the spool 11 is normally placed in a normal position by the force of a spring 12.
中空円筒状をなすコイル４が直流励磁されると直流磁界
が発生し、透磁性材料よりなるコイルフレーム５ならび
（コイル４の中空部に設けられた固定鉄心１３とこれに
同心状に配設された可動鉄心１５により磁気回路が形成
され、固定鉄心１３と可動鉄心１５の相互間に吸引力が
作用しスプリング１２のばね力に抗して両者が吸着され
スプール１１が移動して弁本体１内の流体の流路が切換
えられる。このとぎコイル４の磁気回路の抵抗は最小と
なり磁界は最大となる。When the hollow cylindrical coil 4 is excited with direct current, a direct current magnetic field is generated, and the coil frame 5 made of a magnetically permeable material and the fixed iron core 13 provided in the hollow part of the coil 4 are arranged concentrically therewith. A magnetic circuit is formed by the movable iron core 15, and an attractive force acts between the fixed iron core 13 and the movable iron core 15, so that they are attracted against the spring force of the spring 12, and the spool 11 moves to move inside the valve body 1. The resistance of the magnetic circuit of the sharpening coil 4 becomes minimum and the magnetic field becomes maximum.
コイル４の励磁を止めると磁界の発生が断たれ可動鉄心
１５即ちスプール１１はスプリング１２のばね力により
ノーマル位置へ復帰する。When the excitation of the coil 4 is stopped, the generation of the magnetic field is cut off, and the movable iron core 15, ie, the spool 11, returns to its normal position by the spring force of the spring 12.
合成樹脂材のケースに収納されるソレノイド部品のコイ
ル４の端部に設けられた透磁性材料よりなるコイルフレ
ーム５に近接して磁気センサ６が設けられる。コイル４
が直流励磁されるとコイルフレーム５を介して発生する
磁束に磁気センサ６は鎖交し従って直流磁界の方向なら
びにその大いさに感応した電気信号を出力する。A magnetic sensor 6 is provided close to a coil frame 5 made of a magnetically permeable material and provided at the end of a coil 4 of a solenoid component housed in a case made of synthetic resin. coil 4
When DC is excited, the magnetic sensor 6 interlinks with the magnetic flux generated through the coil frame 5, and therefore outputs an electric signal responsive to the direction and magnitude of the DC magnetic field.
磁気センサ６出力はレセプタクル１０とプラグ９を経て
電装箱２内に設けられた検出回路７へ入力される。The output of the magnetic sensor 6 is inputted to a detection circuit 7 provided in the electrical equipment box 2 via a receptacle 10 and a plug 9.
また一方可動鉄心１５が作動して所定位置に達したとき
の磁気センサ６出力レベルをしぎい値として検出回路７
へ入力すると、磁気センサ６出力が上記しきい値を超え
たとぎ検出回路７はオンオフの２値出力を発生するので
、検出回路７により電磁切換弁の所定の作動状態が正し
く検出される。On the other hand, the detection circuit 7 sets the output level of the magnetic sensor 6 when the movable iron core 15 operates and reaches a predetermined position as a threshold value.
When the output of the magnetic sensor 6 exceeds the threshold value, the detection circuit 7 generates a binary output of on/off, so that the detection circuit 7 correctly detects the predetermined operating state of the electromagnetic switching valve.
電装箱２内の検出回路７出力に表示灯１６を設けること
により電磁切換弁の作動が適切に表示できる。By providing an indicator light 16 at the output of the detection circuit 7 in the electrical equipment box 2, the operation of the electromagnetic switching valve can be appropriately indicated.
また検出回路７の２値出力を電装箱２から所定位置へ遠
隔伝送することにより、電磁切換弁の適格な作動情報が
担当者に伝達できて、電磁切換弁の異常発生が直らに検
出され早期に対応が図れるので、電磁切換弁は常に正し
い動作状態に維持できる。In addition, by remotely transmitting the binary output of the detection circuit 7 from the electrical box 2 to a predetermined position, proper operating information of the solenoid directional valve can be transmitted to the person in charge, and abnormalities in the solenoid directional valve can be detected immediately and early. The electromagnetic switching valve can always be maintained in the correct operating state.
第２図はこの発明の他の実施例を示す断面図であり、構
成は第１図と同一で、検出回路７がソレノイド部品内の
磁気センサ６の近傍に設置された例を示し、電磁切換弁
の所定の作動を示すオンオフ情報が電装箱２へ伝送され
る。FIG. 2 is a sectional view showing another embodiment of the present invention, and the configuration is the same as that in FIG. On/off information indicating a predetermined operation of the valve is transmitted to the electrical equipment box 2.
第３図は磁気センサの一例を示す構成図であり、
図において６は上記実施例と同一で、１９は磁界の影響
により抵抗値が変化する磁性体薄膜よりなる第１磁気抵
抗素子、２０は第１！ｉ気抵抗素子１９と一端を共用し
直交して配置される第２磁気抵抗素子、２１は磁気抵抗
素子が搭載される塞板、２２は直流電源を示している。FIG. 3 is a configuration diagram showing an example of a magnetic sensor. In the figure, 6 is the same as in the above embodiment, 19 is a first magnetoresistive element made of a magnetic thin film whose resistance value changes due to the influence of a magnetic field, and 20 is a first magnetoresistive element. 1st! A second magnetoresistive element shares one end with the magnetic resistance element 19 and is disposed orthogonal to it, 21 is a blocking plate on which the magnetoresistive element is mounted, and 22 is a DC power source.
第１磁気抵抗素子１９および第２磁気抵抗素子２０は共
に強磁性体金属Ｆｅ −Ｎｒ またはＣｏ−Ｎ＋よりな
る薄膜にて形成され直交配置されている。磁気抵抗素子
に対する磁化の方向ならびに磁化の大きさが変わるとこ
れに従ってそれぞれ抵抗値が変化する。The first magnetoresistive element 19 and the second magnetoresistive element 20 are both formed of thin films made of ferromagnetic metal Fe--Nr or Co--N+, and are arranged orthogonally. When the direction of magnetization and the magnitude of magnetization of the magnetoresistive element change, the resistance value changes accordingly.
基板２１と平行した面のあらゆる方向から磁界を加える
と、直交配置された第１ｖｉｉ気抵抗素子１９と第２１
１気抵抗素子２０はそれぞれ直流磁界に感応して抵抗値
が変化する、従って磁気センサ６から可動鉄心１５の作
動により変わる直流磁界に比例する両者の抵抗値の差動
出力が１ｑられる。When a magnetic field is applied from all directions on a plane parallel to the substrate 21, the first vii resistive element 19 and the twenty-first resistive element 19 orthogonally arranged
Each of the resistance elements 20 has a resistance value that changes in response to a DC magnetic field. Therefore, the magnetic sensor 6 outputs a differential output of the resistance values of the two that is proportional to the DC magnetic field that changes due to the operation of the movable iron core 15.
磁気センサ６からの差動出力は周囲温度の変化による抵
抗値の変動分は補償されるので安定した抵抗変化が得ら
れる。Since the differential output from the magnetic sensor 6 compensates for variations in resistance value due to changes in ambient temperature, stable resistance changes can be obtained.
第４図は検出回路の一例を示すブロック図で必り、６．
７．１９．２０．２２は上記実施例と同一で、２３は検
出回路７へ入力されるしきい値であり、
外部から加えられた直流磁界に感応する磁気センサ６の
抵抗値の差動出力に直流電源２２を接続して（ｑられた
差動電圧と、可動鉄心１５が所定の作動位置にあるとき
の磁気センサ６出力に対応したレベルのしきい値２３を
検出回路７に入力すると、電磁切換弁の可動鉄心１５の
作動により磁気回路の抵抗即ち直流磁界が変化し、これ
に感応する磁気センサ６出力がしきい値２３を超えたと
き検出回路７より、可動鉄心１５の所定位置における磁
界が検出されるので電磁切換弁の作動が正しく検出でき
る。FIG. 4 is a block diagram showing an example of a detection circuit.6.
7.19.20.22 are the same as in the above embodiment, and 23 is a threshold value input to the detection circuit 7, which is a differential output of the resistance value of the magnetic sensor 6 that is sensitive to the DC magnetic field applied from the outside. By connecting the DC power supply 22 to When the resistance of the magnetic circuit, that is, the DC magnetic field, changes due to the operation of the movable core 15 of the electromagnetic switching valve, and the output of the magnetic sensor 6 that is sensitive to this changes exceeds the threshold value 23, the detection circuit 7 detects that the movable core 15 is at a predetermined position. Since the magnetic field is detected, the operation of the electromagnetic switching valve can be detected correctly.
第５図は磁気センサ作動の一例を示し、磁気センサ６は
透磁性材料よりなるコイルフレーム５に近接し且つその
磁界に感応する位置に配置されており、コイル４を直流
励磁したとき可動鉄心１５と固定鉄心１３との距離、即
ちス］・ローフに対する磁気センサ６の出力レベルとの
関係は、図示のとおり可動鉄心１５のストロークがＯに
近づく即ちスプール１１が正しく作動して所定の位置に
近づくと、磁気センサ６出力レベルは急撃に顕著な変化
を呈して磁界の強さが大きくなることを示す。検出回路
７にてしきい値２３を上記変化に対応した値に選定する
と、可動鉄心１５の所定の作動が正しく検出できる。FIG. 5 shows an example of the operation of the magnetic sensor, in which the magnetic sensor 6 is placed close to the coil frame 5 made of a magnetically permeable material and at a position sensitive to the magnetic field, and when the coil 4 is excited with direct current, the movable iron core 15 The relationship between the distance between and the fixed core 13, that is, the output level of the magnetic sensor 6 with respect to the loaf, is as shown in the figure, when the stroke of the movable core 15 approaches O, that is, the spool 11 operates correctly and approaches the predetermined position. Then, the output level of the magnetic sensor 6 shows a sudden change, indicating that the strength of the magnetic field increases. When the threshold value 23 is selected in the detection circuit 7 to a value corresponding to the above change, a predetermined operation of the movable iron core 15 can be detected correctly.
磁気センサ６は差動出力を発生しているので、電磁切換
弁の作動により温度が上昇してそれぞれの磁気抵抗素子
の抵抗値が変動しても、作動出力にて補償され周囲温度
の広い範囲に亙り安定した抵抗値が１ｑられる。Since the magnetic sensor 6 generates a differential output, even if the temperature rises due to the operation of the electromagnetic switching valve and the resistance value of each magnetic resistance element fluctuates, it is compensated by the operating output and can be used over a wide range of ambient temperatures. A stable resistance value of 1q is obtained over a period of 1q.
ソレノイド部品の固定鉄心１３と可１７１鉄心に：常数
、Ｎ：コイルの巻数、χ：可動鉄心のストローク、Ｉ：
コイル電流、Ｓ：吸着部面積、従って可動鉄心１５の所
定の動作と磁気センサ６出力とは互いに対応できるので
、この出力を監視することにより？ｌｉ［ｎ切換弁の動
作が正しく把握できる。For the fixed core 13 and flexible core 171 of the solenoid parts: constant, N: number of turns of the coil, χ: stroke of the movable core, I:
Coil current, S: attraction area, therefore, the predetermined operation of the movable iron core 15 and the output of the magnetic sensor 6 can correspond to each other, so by monitoring this output? li [n The operation of the switching valve can be understood correctly.
電磁切換弁のコイル４の励磁電圧による作動表示におい
て、ソレノイド部品のコイル４への接続不良やコイル４
の断線、または作動油中への異物混入によるスプール１
１の作動のスティックなどにより、励磁電圧が印加され
表示灯１６が点灯しても電磁切換弁は正しく作動しない
ことがあるのと異なり、可変鉄心１５またはこれに連結
されるスプール１１の作動が直接検出される、従って電
磁切換弁による流路の切換動作が正しく把握できる。In the operation display based on the excitation voltage of the coil 4 of the electromagnetic switching valve, the solenoid parts may have a poor connection to the coil 4, or the coil 4 may be damaged.
Spool 1 due to wire breakage or foreign matter entering the hydraulic oil.
Unlike the case where the electromagnetic switching valve does not operate correctly even if the excitation voltage is applied and the indicator light 16 lights up due to the actuation stick of 1, etc., the operation of the variable iron core 15 or the spool 11 connected to it is directly caused. Therefore, the switching operation of the flow path by the electromagnetic switching valve can be correctly grasped.
コイル４の励磁と磁気センサ６感応出力が整合しないと
きの異常発生時の情報伝達は、検出回路７の２値出力を
警報器や表示灯１６などに供給して迅速に行えるので、
常に電磁切換弁が正常な動作を行うように維持管理でき
る。Information transmission in the event of an abnormality when the excitation of the coil 4 and the sensitive output of the magnetic sensor 6 do not match can be carried out quickly by supplying the binary output of the detection circuit 7 to the alarm, indicator light 16, etc.
The solenoid switching valve can be maintained and managed so that it always operates normally.
［発明の効果］
この発明は以上説明したとおり、電磁切換弁を作動さぜ
るンレノイド部内のコイル端部に近接して磁気センサを
配設しその出力に検出回路を設ける簡単な構造により、
電磁切換弁の作動は励磁電圧が印加されたコイルの発生
する直流磁界により、可動鉄心に吸引力が作用し、同時
に磁気センサも上記磁界に感応して出力するので、
磁気センサ出力としきい値が加えられる検出回路出力を
監視することによりスプールの作動即ち電磁切換弁の作
動が正しく検知できる。[Effects of the Invention] As explained above, the present invention has a simple structure in which a magnetic sensor is disposed close to the end of the coil in the renoid section that operates the electromagnetic switching valve, and a detection circuit is provided at the output of the magnetic sensor. The switching valve operates by applying an attractive force to the movable iron core due to the DC magnetic field generated by the coil to which an excitation voltage is applied, and at the same time, the magnetic sensor outputs an output in response to the magnetic field, so the magnetic sensor output and threshold value are added together. By monitoring the output of the detection circuit, the operation of the spool, that is, the operation of the electromagnetic switching valve can be correctly detected.
磁気センサは差動出力を発生するので電磁切換弁の温度
上昇に対しても安定し信頼できる信号を出力する。Since the magnetic sensor generates a differential output, it outputs a stable and reliable signal even when the temperature of the electromagnetic switching valve increases.
電磁切換弁は本来の作動ならびに寸法は何等影響を受け
ることなく、異常動作が発生したときは２値信号を供給
して迅速に報知できるので、電磁切換弁は常時正常な動
作を行うよう維持管理できるという効果がある。The original operation and dimensions of the solenoid directional valve are not affected in any way, and when an abnormal operation occurs, a binary signal can be supplied to quickly notify the solenoid directional valve, so it is necessary to maintain and manage the solenoid directional valve so that it always operates normally. There is an effect that it can be done.
第１図はこの発明の一実施例を示す断面図、第２図はこ
の発明の他の実施例を示す断面図、第３図は磁気センサ
の一例を示す構成図、第４図は検出回路の一例を示すブ
ロック図、第５図は磁気センサ作動の一例、第６図は従
来の電磁切換弁の断面図である。
図において、１は弁本体、２は電装箱、旦はソレノイド
部、４はコイル、５はコイルフレーム、６は磁気センサ
、７は検出回路、８は端子板、９はプラグ、１０はレセ
プタクル、１１はスプール、１２はスプリング、１３は
固定鉄心、１４はブツシュピン、１５は可動鉄心、１６
は表示灯である。
なお、各図中同一符号は同一または相当部分を示す。
特許出願人 株式会社 東京計器
８；端子板 １６；表示灯第７図
第２図
第３図
５！界
第４図Fig. 1 is a sectional view showing one embodiment of the present invention, Fig. 2 is a sectional view showing another embodiment of the invention, Fig. 3 is a configuration diagram showing an example of a magnetic sensor, and Fig. 4 is a detection circuit. A block diagram showing an example, FIG. 5 is an example of the operation of a magnetic sensor, and FIG. 6 is a sectional view of a conventional electromagnetic switching valve. In the figure, 1 is the valve body, 2 is the electrical box, 1 is the solenoid part, 4 is the coil, 5 is the coil frame, 6 is the magnetic sensor, 7 is the detection circuit, 8 is the terminal board, 9 is the plug, 10 is the receptacle, 11 is a spool, 12 is a spring, 13 is a fixed core, 14 is a bushing pin, 15 is a movable core, 16
is an indicator light. Note that the same reference numerals in each figure indicate the same or corresponding parts. Patent applicant Tokyo Keiki Co., Ltd. 8; Terminal board 16; Indicator light Figure 7 Figure 2 Figure 3 Figure 5! Figure 4
Claims (1)
を印加して可動鉄心の作動により流体の流路の切換えを
行う電磁切換弁において、印加された励磁電圧により上
記コイルが発生する直流磁界に感応する磁気センサと、 上記磁気センサ出力により上記可動鉄心の所定位置を識
別する検出回路とを備え、可動鉄心の作動を検出するこ
とを特徴とする電磁切換弁。[Claims] In an electromagnetic switching valve that applies a DC excitation voltage to a solenoid coil attached to the valve body and switches the fluid flow path by operating a movable core, the coil is generated by the applied excitation voltage. What is claimed is: 1. An electromagnetic switching valve comprising: a magnetic sensor sensitive to a direct current magnetic field; and a detection circuit that identifies a predetermined position of the movable core based on the output of the magnetic sensor, and detects operation of the movable core.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9949588A JPH01269768A (en) | 1988-04-22 | 1988-04-22 | Electromagnetic selector valve |
| US07/331,381 US4953590A (en) | 1988-04-22 | 1989-03-31 | Electromagnetic directional control valve |
| GB8908751A GB2217917B (en) | 1988-04-22 | 1989-04-18 | Electromagnetic fluid control valve |
| DE19893913222 DE3913222C2 (en) | 1988-04-22 | 1989-04-21 | Electromagnetic directional control valves |
| US07/569,281 US5101856A (en) | 1988-04-22 | 1990-06-28 | Electromagnetic directional control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9949588A JPH01269768A (en) | 1988-04-22 | 1988-04-22 | Electromagnetic selector valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01269768A true JPH01269768A (en) | 1989-10-27 |
Family
ID=14248876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9949588A Pending JPH01269768A (en) | 1988-04-22 | 1988-04-22 | Electromagnetic selector valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01269768A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038123A (en) * | 1996-07-25 | 1998-02-13 | Tokyo Gas Co Ltd | Bidirectional cutoff valve |
| EP0872857A2 (en) * | 1997-04-19 | 1998-10-21 | Robert Bosch Gmbh | Electromagnet for operating a valve actuator |
| JP2017187169A (en) * | 2016-04-01 | 2017-10-12 | Ckd株式会社 | Solenoid valve with sensor |
-
1988
- 1988-04-22 JP JP9949588A patent/JPH01269768A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1038123A (en) * | 1996-07-25 | 1998-02-13 | Tokyo Gas Co Ltd | Bidirectional cutoff valve |
| EP0872857A2 (en) * | 1997-04-19 | 1998-10-21 | Robert Bosch Gmbh | Electromagnet for operating a valve actuator |
| EP0872857A3 (en) * | 1997-04-19 | 1999-04-14 | Robert Bosch Gmbh | Electromagnet for operating a valve actuator |
| JP2017187169A (en) * | 2016-04-01 | 2017-10-12 | Ckd株式会社 | Solenoid valve with sensor |
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