JP4553195B2 - Gas measuring device - Google Patents

Gas measuring device Download PDF

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JP4553195B2
JP4553195B2 JP2005037686A JP2005037686A JP4553195B2 JP 4553195 B2 JP4553195 B2 JP 4553195B2 JP 2005037686 A JP2005037686 A JP 2005037686A JP 2005037686 A JP2005037686 A JP 2005037686A JP 4553195 B2 JP4553195 B2 JP 4553195B2
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gas
arm
valve
switching valve
frame
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JP2006226710A (en
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修二 田島
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Riken Keiki KK
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Riken Keiki KK
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Description

本発明は、外部の被測定流体を強制的に導入して成分を測定する装置、より詳細には流体の導入経路を切り替えるための切換弁の構造に関する。   The present invention relates to an apparatus for forcibly introducing an external fluid to be measured and measuring a component, and more particularly to a structure of a switching valve for switching a fluid introduction path.

外部の被測定流体をポンプなどにより強制的にセンサーに導入して成分を測定する装置においては、流路を切換えることができるように操作性の良好なロータリー式三方弁が利用されている。
しかしながら、基本的にボール弁を使用した構造であるため、温度が降下した場合には熱膨張率の差に起因して封止性が低下する場合があり、メンテナンスに手間を要するなどの問題がある。 In an apparatus for forcibly introducing an external fluid to be measured into a sensor by a pump or the like and measuring a component, a rotary three-way valve with good operability is used so that the flow path can be switched.
However, since the structure basically uses a ball valve, if the temperature drops, the sealing performance may be reduced due to the difference in the coefficient of thermal expansion, and there are problems such as requiring labor for maintenance. is there.

本発明はこのような問題に鑑みてなされたものであって、その目的とするところは回動操作により確実に流路を切り替えることができる切換弁を備えたガス測定装置を提供することである。   The present invention has been made in view of such problems, and an object of the present invention is to provide a gas measuring device including a switching valve that can reliably switch the flow path by a turning operation. .

このような課題を達成するために本発明においては、外部からのサンプリングガスを切換弁を介してガスセンサーに供給して成分を測定するガス測定装置において、前記切換弁は、これを構成するスライド弁の作動杆に結合された枠体と、一端が前記枠体に遊嵌され、他端が外部操作可能なノブにより回動される軸に固定されたアームと、基台と前記アームとの間に掛け渡されて前記アームを前記作動杆のいずれかの一端側に付勢する引っ張りバネとにより構成され、また前記アームと前記枠体との移動をそれぞれ検出するための移動検出手段が設けられている。 In order to achieve such a problem, in the present invention, in the gas measuring device for measuring a component by supplying sampling gas from the outside to the gas sensor via the switching valve, the switching valve is a slide constituting the same. A frame coupled to the valve operating rod, an arm having one end loosely fitted to the frame and the other end fixed to a shaft rotated by an externally operable knob, a base and the arm A movement detecting means for detecting movement of each of the arm and the frame, each of which is constituted by a tension spring that is stretched between and urges the arm toward one end side of the operating rod. It has been.

本発明によれば、スライド操作に比較して操作性の良好な回動操作により流路の切換を可能としつつ、スライド弁が有する高い封止性により２つの流路のガスが混合するなどの不都合を防止することができ、またノブの回動により流路が切換えられたかを確実に検出することができる。 According to the present invention, the gas in the two flow paths is mixed by the high sealing property of the slide valve while allowing the flow paths to be switched by a rotation operation with better operability compared to the slide operation. it is possible to prevent a disadvantage, also Ru can reliably detect whether the flow path is switched by the rotation of the knob.

図１は、本発明の一実施例を示すものであって、複数、この実施例ではそれぞれ異なる成分に感応する２つのガスセンサー１、２、及びこれらガスセンサー１、２からの信号を処理する信号処理手段３、及び本発明が特徴とする切換弁４をケース１０に収容し、切換弁４を介して一方のガスセンサー１（２）に被測定流体を供給するように構成されている。   FIG. 1 shows an embodiment of the present invention, in which a plurality of gas sensors 1 and 2 sensitive to different components in this embodiment, and signals from these gas sensors 1 and 2 are processed. The signal processing means 3 and the switching valve 4 characterized by the present invention are accommodated in a case 10, and the fluid to be measured is supplied to one gas sensor 1 (2) through the switching valve 4.

切換弁４は外部から比較的操作のしやすい位置に切換えノブ５が設けられ、ノブ５の回動操作により流入口６を２つの流出口７、８のいずれか一方に連通させて一方のガスセンサーにのみ被測定流体を供給することができる。   The switching valve 4 is provided with a switching knob 5 at a position that is relatively easy to operate from the outside. By turning the knob 5, the inlet 6 is connected to one of the two outlets 7 and 8, and one gas is The fluid to be measured can be supplied only to the sensor.

また、ケース１０には外部の被検ガスを導入するガス導入口１１、ガスセンサーに流入した被検ガスを外部に排出する排出口１３が設けられ、ガス導入口１１は切換弁４の流入口６に、さらにガスセンサー１、２のガス取り入れ口１ａ、２ａがそれぞれ切換弁４の流出口７、８に図示しないチューブなどの管路により接続されている。なお、図中符号１ｂ、２ｂは、センサー１、２のガス排出口を示す。   Further, the case 10 is provided with a gas inlet 11 for introducing an external test gas and an exhaust port 13 for discharging the test gas flowing into the gas sensor to the outside. The gas inlet 11 serves as an inlet of the switching valve 4. 6, the gas intake ports 1a and 2a of the gas sensors 1 and 2 are connected to the outlets 7 and 8 of the switching valve 4 by pipes such as tubes (not shown), respectively. In addition, the code | symbol 1b, 2b in a figure shows the gas exhaust port of the sensors 1 and 2. FIG.

図２は、上述の切換弁４の一実施例を示すものであって、基台１４の一端側、この実施例では図中上部に往復動式の三方弁１５が固定され、スライド弁１６の作動杆１７の両端には略「コ」字状の枠体１８が往復動可能に取り付けられている。   FIG. 2 shows an embodiment of the switching valve 4 described above. A reciprocating three-way valve 15 is fixed to one end side of the base 14, in this embodiment, the upper portion in the figure. A substantially “U” -shaped frame 18 is attached to both ends of the operating rod 17 so as to be able to reciprocate.

また、スライド弁１６のほぼ中心線を通るように回転軸１９が基台１４を貫通するように設けられ、表面となる側にはノブ５が、また裏面となる側にはアーム２０が固定されている。アーム２０は一端側が枠体１８に遊嵌されていて、アーム２０の回動により枠体１８を直線移動させるようになっている。   In addition, a rotary shaft 19 is provided so as to pass through the base 14 so as to pass through almost the center line of the slide valve 16, and the knob 5 is fixed to the front side and the arm 20 is fixed to the back side. ing. One end of the arm 20 is loosely fitted to the frame body 18, and the frame body 18 is linearly moved by the rotation of the arm 20.

アーム２０の枠体側（図中、上部）と基台１４との間には引っ張りバネ２１が掛け渡されていて、スライド弁１６の２つの死点に対応する位置を安定点として、いずれか一方の位置を保持するようなっている。   A tension spring 21 is stretched between the frame side (upper part in the drawing) of the arm 20 and the base 14, and one of the positions corresponding to the two dead points of the slide valve 16 is set as a stable point. Is supposed to hold the position.

また、アーム２０の２安定点のそれぞれに対応する位置にはアーム２０に接触してオンオフ動作するように移動検出手段としてのマイクロスイッチ２２と、このアーム２０の回動に枠体１８が追従して移動したことを確認するために、枠体１８の移動によりオンオフする移動検出手段としてのマイクロスイッチ２３とが配置されている。   In addition, the micro switch 22 as a movement detecting means and the frame 18 follow the rotation of the arm 20 so that the arm 20 comes into contact with the arm 20 and is turned on and off at positions corresponding to the two stable points of the arm 20. In order to confirm that it has moved, a micro switch 23 is disposed as a movement detecting means that is turned on and off by the movement of the frame 18.

これにより、ノブ５によりアーム２０が回動されても、何かの不都合で枠体１８が移動しない状態、つまり切換弁４が切換え操作されないといった状態を確実に検出できる。   Thereby, even if the arm 20 is rotated by the knob 5, it is possible to reliably detect a state where the frame body 18 does not move due to some inconvenience, that is, a state where the switching valve 4 is not switched.

この実施例においてノブ５をバネ２１の反力に抗して一方に回動すると、アーム２０の回動につれて枠体１８が一方の方向に移動してスライド弁１６が他方の死点に移動し、バネ２１の付勢力によりスライド弁１６がパッキン２５に押し付けられる。   In this embodiment, when the knob 5 is rotated to one side against the reaction force of the spring 21, the frame 18 moves in one direction as the arm 20 rotates, and the slide valve 16 moves to the other dead center. The slide valve 16 is pressed against the packing 25 by the biasing force of the spring 21.

これにより、第２の流入口と流出口とが連通するとともに、第１の流入口と流出口とは弁室２４に配置されたパッキン２５とスライド弁１６とにより完全に遮断され、被検流体が第２のガスセンサー２に流入する。   As a result, the second inlet and the outlet communicate with each other, and the first inlet and the outlet are completely blocked by the packing 25 and the slide valve 16 disposed in the valve chamber 24, and the fluid to be tested Flows into the second gas sensor 2.

この切換え操作により一方のマイクロスイッチ２２がオンからオフに、他方のマイクロスイッチ２３がオフからオンに切り替わる。なお、パッキン２５は、作動杆１７との間に流路を確保できる程度の間隙を形成する内径を備えたリング状に形成されている。   By this switching operation, one micro switch 22 is switched from on to off, and the other micro switch 23 is switched from off to on. The packing 25 is formed in a ring shape having an inner diameter that forms a gap to the extent that a flow path can be secured with the operating rod 17.

これらマイクロスイッチ２２、２３のオンオフの切り替わりにより、三方弁１５が切り替えられたことが確認できるため、信号処理手段３は第２のセンサー２の校正データに基づいて成分を検出する。   Since it can be confirmed that the three-way valve 15 has been switched by switching the micro switches 22 and 23 on and off, the signal processing means 3 detects the component based on the calibration data of the second sensor 2.

もとより、レバー１７は引っ張りバネ２１により安定点に位置するように付勢されているので、ノブ５に若干の外力が作用した程度ではスライド弁１６は移動せず、設定されている流路を維持する。   Of course, since the lever 17 is urged to be positioned at a stable point by the tension spring 21, the slide valve 16 does not move to the extent that a slight external force is applied to the knob 5, and the set flow path is maintained. To do.

なお、上述の実施例においては、サンプリングガスを２つのガスセンサーに振り分ける場合に例をとって説明したが、２種類のサンプリングガスのいずれかを１つのガスセンサーに切り替えて供給する場合に適用しても同様の作用を奏することは明らかである。   In the above-described embodiment, an example has been described in which the sampling gas is distributed to the two gas sensors, but the present invention is applied to the case where one of the two types of sampling gas is switched to be supplied to one gas sensor. However, it is clear that the same effect is achieved.

すなわち、図１において流出口７、８のそれぞれをチューブなどによりサンプリング領域に連通させ、また流入口６をガスセンサーの流入口に接続することにより、２箇所のガスを測定することができる。   That is, by connecting each of the outlets 7 and 8 to the sampling region with a tube or the like in FIG. 1 and connecting the inlet 6 to the inlet of the gas sensor, two gases can be measured.

本発明のガス検出装置の一実施例を示す図である。It is a figure which shows one Example of the gas detection apparatus of this invention. 同上ガス検出装置に使用されている三方切換弁の一実施例を示す正面図である。It is a front view which shows one Example of the three-way selector valve currently used for the gas detection apparatus same as the above. 同上三方切換弁の背面図である。It is a rear view of a three-way switching valve same as the above. 同上三方切換弁の側面図である。It is a side view of a three-way selector valve same as the above. 同上三方切換弁の、図１における線分Ａ−Ａでの断面図である。It is sectional drawing in line segment AA in FIG. 1 of a three-way switching valve same as the above.

符号の説明Explanation of symbols

１、２ ガスセンサー
３ 信号処理手段
４ 切換弁
５ 切換えノブ
６ 流入口
７、８ 流出口
１４ 基台
１５ 往復動式の三方弁
１６ スライド弁
１７ 作動杆
１８ 略「コ」字状の枠体
１９ 回転軸
２０ アーム
２１ 引っ張りバネ
２２、２３ マイクロスイッチ
２４ 弁室
２５ パッキン DESCRIPTION OF SYMBOLS 1, 2 Gas sensor 3 Signal processing means 4 Switching valve 5 Switching knob 6 Inlet 7, 8 Outlet 14 Base 15 Reciprocating three-way valve 16 Slide valve 17 Actuation rod 18 Substantially "U" -shaped frame 19 Rotating shaft 20 Arm 21 Tension spring 22, 23 Micro switch 24 Valve chamber 25 Packing

Claims (1)

外部からのサンプリングガスを切換弁を介してガスセンサーに供給して成分を測定するガス測定装置において、
前記切換弁は、これを構成するスライド弁の作動杆に結合された枠体と、一端が前記枠体に遊嵌され、他端が外部操作可能なノブにより回動される軸に固定されたアームと、基台と前記アームとの間に掛け渡されて前記アームを前記作動杆のいずれかの一端側に付勢する引っ張りバネとにより構成され、また前記アームと前記枠体との移動をそれぞれ検出するための移動検出手段が設けられているガス測定装置。 In a gas measuring device for measuring components by supplying an external sampling gas to a gas sensor via a switching valve,
The switching valve is fixed to a frame that is coupled to an operating rod of a slide valve that constitutes the switching valve, and one end that is loosely fitted to the frame and the other end that is rotated by a knob that can be externally operated. An arm, and a tension spring that spans between the base and the arm and biases the arm toward one end of the operating rod, and moves the arm and the frame. A gas measuring device provided with movement detecting means for detecting each .
JP2005037686A 2005-02-15 2005-02-15 Gas measuring device Expired - Fee Related JP4553195B2 (en)

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Application Number Priority Date Filing Date Title
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JP2006226710A JP2006226710A (en) 2006-08-31
JP4553195B2 true JP4553195B2 (en) 2010-09-29

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2077452B1 (en) * 2008-01-07 2010-11-24 F. Hoffmann-La Roche AG Reagent cartridge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6253357U (en) * 1985-09-24 1987-04-02
JP2001174372A (en) * 1999-12-17 2001-06-29 Shimadzu Corp Odor distinguishing apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6253357U (en) * 1985-09-24 1987-04-02
JP2001174372A (en) * 1999-12-17 2001-06-29 Shimadzu Corp Odor distinguishing apparatus

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