JP2010054333A - Gas detecting tube - Google Patents

Gas detecting tube Download PDF

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JP2010054333A
JP2010054333A JP2008219435A JP2008219435A JP2010054333A JP 2010054333 A JP2010054333 A JP 2010054333A JP 2008219435 A JP2008219435 A JP 2008219435A JP 2008219435 A JP2008219435 A JP 2008219435A JP 2010054333 A JP2010054333 A JP 2010054333A
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gas
tube
gas detection
detection tube
agent
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Koji Nakazato
孝司 中里
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Gastec Corp
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Gastec Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas detecting tube having a means capable of properly responding to errors related to a direction of connecting with a gas suction pump. <P>SOLUTION: The gas detecting tube 11 includes at least a detecting agent 17 with which a glass tube 12 is filled and a removal agent 20 disposed at an end of the detecting agent 17 through a packing 19. The gas detecting tube 11 is configured such that both ends 13, 14 of the glass tube 12 are brought to shrink in diameter and sealed in a fused fashion, and a suction part 15 of a gas to be measured is formed, when one end is cut off, and connections 16 to be connected with the gas suction pump are formed, when the other end is cut off, and the responding means is implemented, which can properly respond to the errors related to the direction of connecting with the gas suction pump. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、ガス吸引ポンプに接続して使用するガス検知管に関するものであり、更に詳しくは、ガス吸引ポンプへの接続方向の誤りに対して、適宜に対処できる手段が講じられたガス検知管に関するものである。   The present invention relates to a gas detection tube used by being connected to a gas suction pump, and more specifically, a gas detection tube provided with means capable of appropriately dealing with an error in the connection direction to the gas suction pump. It is about.

従来のガス検知管としては、次のような構成のものが知られている。このガス検知管は、透明なガラス管の内部に所定量の検知剤を充填すると共に、この検知剤を保持するためのパッキンを両側に配設し、さらに、ガラス管の両端部は、縮径して溶封した構成である（特許文献１、２及び３参照）。   As a conventional gas detection tube, one having the following configuration is known. This gas detection tube is filled with a predetermined amount of detection agent inside a transparent glass tube, and packings for holding this detection agent are disposed on both sides, and both ends of the glass tube are reduced in diameter. (See Patent Documents 1, 2, and 3).

このような構成のガス検知管は、使用時に両方の端部を専用の工具で切り欠いてから、ガス吸引ポンプの吸引口に対して所定の接続方向を向けて接続する。そして、ガス吸引ポンプのハンドルを引いてガス検知管に気体を通気させる。ガス検知管の検知剤は気体中の被測定ガスに反応して変色し、その変色した先端の目盛りを読み取ることでガス濃度が測定される仕組みである。
実開平６−２２２５号公報 実開昭５９−１１５３４２号公報 特開昭５３−５２１９３号公報 The gas detection tube having such a configuration is cut out at both ends with a dedicated tool during use, and then connected to the suction port of the gas suction pump in a predetermined connection direction. Then, the handle of the gas suction pump is pulled to allow gas to pass through the gas detection tube. The detection agent in the gas detection tube changes its color in response to the gas to be measured in the gas, and the gas concentration is measured by reading the scale at the changed tip.
Japanese Utility Model Publication No. 6-2225 Japanese Utility Model Publication No.59-115342 JP-A-53-52193

この従来例のガス検知管においては、ガス吸引ポンプへの接続方向の表示が一応なされてはいるものの、誤って正規の接続方向と反対に向けて接続する作業ミスが生じる恐れがある。   In this conventional gas detection tube, although the indication of the connection direction to the gas suction pump is provided for the time being, there is a risk that an operation error will occur in which the connection is erroneously made in the direction opposite to the normal connection direction.

この場合は、ガス吸引ポンプで気体を吸引してもガス濃度の測定値は得られないばかりでなく、被測定ガスの種類と検知剤との関係で有害ガスが発生することがあるという重大な問題点を有している。   In this case, not only the gas concentration measurement value is not obtained even if the gas is sucked by the gas suction pump, but a serious gas may be generated due to the relationship between the type of gas to be measured and the detection agent. Has a problem.

更には、発生した有害ガスの影響でガス吸引ポンプの内部を傷めて故障の原因となるという問題点もある。   Furthermore, there is also a problem that the inside of the gas suction pump is damaged due to the influence of the generated harmful gas and causes a failure.

従って、従来例におけるガス検知管においては、ガス吸引ポンプへの接続方向の誤りに対して、適宜に対処できる何らかの対策を講じることに解決しなければならない課題を有している。   Therefore, the gas detection tube in the conventional example has a problem that must be solved by taking some measures that can appropriately deal with an error in the connection direction to the gas suction pump.

前記従来例の課題を解決する具体的手段として本発明は、ガラス管の内部に充填された検知剤と、該検知剤の端部にパッキンを介して配設された除去剤とを少なくとも備え、前記ガラス管の両端部は、縮径して溶封した構成のガス検知管であって、該ガス検知管は、一端部を切り欠くと被測定ガスの吸引部が形成され、他端部を切り欠くとガス吸引ポンプへの接続部が形成されると共に、前記ガス吸引ポンプへの接続方向の誤りに対して適宜に対処できる対処手段が講じられていることを特徴とするガス検知管を提供するものである。   As a specific means for solving the problems of the conventional example, the present invention comprises at least a detection agent filled in a glass tube, and a removal agent disposed at the end of the detection agent via a packing, Both ends of the glass tube are gas detection tubes having a reduced diameter and sealed, and when the gas detection tube is cut off at one end, a suction portion for the gas to be measured is formed and the other end is formed. Provided is a gas detection tube characterized in that when notched, a connection portion to a gas suction pump is formed, and a coping means capable of appropriately dealing with an error in the connection direction to the gas suction pump is taken. To do.

また、前記対処手段は、前記検知剤の前記吸引部側の端部に配設された有害ガス除去用の除去剤であること、；
前記対処手段は、前記吸引部側における、前記ガス検知管の外周面に設けられた接続防止用の突部であること、；
前記対処手段は、前記吸引部側における、前記ガス検知管の外周面に設けられた通気漏れ用の突条部であること、；
前記対処手段は、前記ガス検知管の内部に設けられた逆流防止弁であること、；
前記対処手段は、前記吸引部側における、前記ガス検知管の前記縮径した部位に嵌着された逆流防止栓であること、；
を含むものである。 Further, the coping means is a remover for removing harmful gas disposed at an end of the detection agent on the suction part side;
The coping means is a connection preventing projection provided on an outer peripheral surface of the gas detection tube on the suction unit side;
The coping means is a ventilation leakage ridge provided on the outer peripheral surface of the gas detection tube on the suction portion side;
The coping means is a backflow prevention valve provided inside the gas detection tube;
The coping means is a backflow prevention plug fitted to the reduced diameter portion of the gas detection tube on the suction portion side;
Is included.

本発明に係るガス検知管は、ガラス管の内部に充填された検知剤と、該検知剤の端部にパッキンを介して配設された除去剤とを少なくとも備え、前記ガラス管の両端部は、縮径して溶封した構成のガス検知管であって、該ガス検知管は、一端部を切り欠くと被測定ガスの吸引部が形成され、他端部を切り欠くとガス吸引ポンプへの接続部が形成されると共に、前記ガス吸引ポンプへの接続方向の誤りに対して適宜に対処できる対処手段が講じられていることによって、従来例のような有害ガスが発生する事故を防止できる。また、それに伴いガス吸引ポンプの内部を有害ガスで傷めることがない。
更には、ガス検知管をガス吸引ポンプに対して正規の接続方向に向けて接続し直せば、正確なガス濃度の測定値を得られることとなるという種々の優れた効果を奏する。 A gas detection tube according to the present invention includes at least a detection agent filled in a glass tube and a removal agent disposed at an end portion of the detection agent via a packing, and both end portions of the glass tube include The gas detector tube is configured to be reduced in diameter and sealed, and when the gas detector tube is cut off at one end, a suction portion for the gas to be measured is formed, and when the other end is cut out, the gas detector tube In addition, the coping means capable of appropriately dealing with an error in the connection direction to the gas suction pump is provided, thereby preventing accidents in which harmful gases are generated as in the conventional example. . In addition, the inside of the gas suction pump is not damaged by harmful gas.
Furthermore, if the gas detection tube is reconnected to the gas suction pump in the normal connection direction, there are various excellent effects that an accurate measurement value of the gas concentration can be obtained.

また、対処手段は、前記検知剤の前記吸引部側の端部に配設された有害ガス除去用の除去剤であることによって、誤ってガス検知管を逆向きに接続して有害ガスが発生した場合でも、有害ガス除去用の除去剤が有害ガスを除去するので、人的被害は発生しない。また、ガス吸引ポンプの内部は傷まないという優れた効果を奏する。   Further, the coping means is a removal agent for removing harmful gas disposed at the end of the detection agent on the suction portion side, so that harmful gas is generated by erroneously connecting the gas detection tube in the reverse direction. Even if this is done, the harmful gas removal agent removes the harmful gas, so no human damage occurs. In addition, there is an excellent effect that the inside of the gas suction pump is not damaged.

そして、対処手段は、前記吸引部側における、前記ガス検知管の外周面に設けられた接続防止用の突部であることによって、この突部が邪魔をしてガス検知管を逆向きに接続できないので、作業ミスが生じないという優れた効果を奏する。   The coping means is a connection preventing projection provided on the outer peripheral surface of the gas detection tube on the suction unit side, so that the projection interferes and connects the gas detection tube in the reverse direction. Since this is not possible, there is an excellent effect that no work mistake occurs.

更に、対処手段は、前記吸引部側における、前記ガス検知管の外周面に設けられた通気漏れ用の突条部であることによって、誤ってガス検知管を逆向きに接続した場合には、突条部の存在によりガス吸引ポンプの吸引口に気密接続できないこととなる。つまり、通気漏れが生じて、ガス検知管には通気できないこととなり、結果的に有害ガスが発生しないという優れた効果を奏する。   Furthermore, when the gas detection tube is erroneously connected in the reverse direction, the coping means is a protrusion for venting leakage provided on the outer peripheral surface of the gas detection tube on the suction portion side. Due to the presence of the protruding portion, the gas suction pump cannot be hermetically connected to the suction port. That is, ventilation leakage occurs and the gas detection tube cannot be vented. As a result, there is an excellent effect that no harmful gas is generated.

また、対処手段は、前記ガス検知管の内部に設けられた逆流防止弁であることによって、誤ってガス検知管を逆向きに接続した場合には、逆流防止弁の存在によりガス検知管に通気ができないこととなり、有害ガスは発生しないという優れた効果を奏する。   Further, since the countermeasure means is a backflow prevention valve provided inside the gas detection pipe, if the gas detection pipe is connected in the reverse direction by mistake, the gas detection pipe is vented by the presence of the backflow prevention valve. Therefore, there is an excellent effect that no harmful gas is generated.

そして、対処手段は、前記吸引部側における、前記ガス検知管の前記縮径した部位に嵌着された逆流防止栓であることによって、誤ってガス検知管を逆向きに接続した場合には、逆流防止栓の存在によりガス検知管に通気ができないこととなり、有害ガスは発生しないという優れた効果を奏する。   And, when the coping means is a backflow prevention plug fitted to the reduced diameter portion of the gas detection tube on the suction part side, when the gas detection tube is erroneously connected in the reverse direction, Due to the presence of the backflow prevention plug, the gas detector tube cannot be ventilated, and an excellent effect is obtained that no harmful gas is generated.

ガス検知管のガス吸引ポンプへの接続方向の誤りに対して、適宜に対処できる対策を講じるという目的を、以下に述べる種々の対処手段を講じることによって実現した。   The purpose of taking measures that can appropriately deal with an error in the connection direction of the gas detection pipe to the gas suction pump was realized by taking various countermeasures described below.

次に、本発明の実施の形態について図面を参照しながら説明する。まず、図１において、符号１１は第１実施例に係るガス検知管を示し、このガス検知管１１は、所定長さの透明なガラス管１２で形成されており、このガラス管１２の両方の端部１３、１４は、縮径して溶封した構成になっている。   Next, embodiments of the present invention will be described with reference to the drawings. First, in FIG. 1, the code | symbol 11 shows the gas detection pipe | tube which concerns on 1st Example, This gas detection pipe | tube 11 is formed with the transparent glass tube 12 of predetermined length, Both of this glass tube 12 is shown. The end portions 13 and 14 are configured to be reduced in diameter and sealed.

一方の端部１３を専用の工具で切り欠くと、被測定ガスの吸引部１５が形成される。また、他方の端部１４を専用の工具で切り欠くと、ガス吸引ポンプへの接続部１６が形成される。   When one end 13 is cut out with a dedicated tool, a measurement gas suction part 15 is formed. Further, when the other end portion 14 is cut out with a dedicated tool, a connection portion 16 to the gas suction pump is formed.

この接続部１６を、図示しないガス吸引ポンプの吸引口に向けて接続して、ガス濃度を測定する。なお、ガラス管１２に表示された「Ｇ」及び「矢印」のマーク３２は、ガス吸引方向、即ち、接続方向を示している。   The connecting portion 16 is connected toward a suction port of a gas suction pump (not shown) to measure the gas concentration. The “G” and “arrow” marks 32 displayed on the glass tube 12 indicate the gas suction direction, that is, the connection direction.

ガラス管１２の表面には、図示しない目盛りが表示されており、被測定ガスに反応して変色した検知剤１７の先端部位を、この目盛りに沿って読み取ることでガス濃度が測定される。   A scale (not shown) is displayed on the surface of the glass tube 12, and the gas concentration is measured by reading along the scale the tip portion of the detection agent 17 that has changed color in response to the gas to be measured.

ガラス管１２の内部には、所定量の検知剤１７が充填されており、この検知剤１７を保持するためのパッキン１８、１９がその両端に配設されている。検知剤１７は、上述のように、通気した測定ガスに反応して変色する。   The glass tube 12 is filled with a predetermined amount of detection agent 17, and packings 18 and 19 for holding the detection agent 17 are disposed at both ends thereof. As described above, the detection agent 17 changes color in response to the aerated measurement gas.

検知剤１７の接続部１６側の端部には、除去剤２０がパッキン１９を介して配設されている。また、除去剤２０を保持するためのパッキン２１が、接続部１６側の端部に配設されている。この除去剤２０は、被測定ガスと検知剤１７との関係で有害ガスが発生したときに、その有害ガスを除去するために設けられており、人的被害やガス吸引ポンプの内部の損傷を防止する。   A removal agent 20 is disposed via a packing 19 at an end of the detection agent 17 on the connection portion 16 side. Further, a packing 21 for holding the removing agent 20 is disposed at an end portion on the connection portion 16 side. This removal agent 20 is provided to remove harmful gas when a harmful gas is generated due to the relationship between the gas to be measured and the detection agent 17, thereby preventing human damage and internal damage of the gas suction pump. To prevent.

更に、検知剤１７の吸引部１５側の端部には、有害ガス除去用の除去剤（対処手段）２２がパッキン１８を介して配設されている。また、除去剤２２を保持するためのパッキン２３が接続部１６側の端部に配設されている。   Further, a removal agent (coping means) 22 for removing harmful gas is disposed via a packing 18 at the end of the detection agent 17 on the suction portion 15 side. Further, a packing 23 for holding the removing agent 22 is disposed at an end portion on the connection portion 16 side.

この除去剤２２の存在によって、ガス検知管１１を誤って正規の接続方向と逆向きにガス吸引ポンプへ接続して気体を吸引した結果、被測定ガスと検知剤１７との関係で有害ガスが発生したときに、当該有害ガスが拡散する前に除去される。従って、人的被害は発生しないし、ガス吸引ポンプの内部は傷まない。   Due to the presence of the removal agent 22, the gas detection tube 11 is erroneously connected to the gas suction pump in the direction opposite to the normal connection direction, and the gas is sucked. When generated, the harmful gas is removed before it diffuses. Therefore, no human damage occurs and the inside of the gas suction pump is not damaged.

次に、図２に第２実施例に係るガス検知管２４を示す。この第２実施例において、前記第１実施例のガス検知管１１と同一部分には同一符号を付してその詳細は省略する。   Next, FIG. 2 shows a gas detection tube 24 according to the second embodiment. In the second embodiment, the same parts as those of the gas detection tube 11 of the first embodiment are denoted by the same reference numerals and their details are omitted.

このガス検知管２４は、吸引部１５側における、ガラス管１２の外周面に沿って接続防止用の突部（対処手段）２５が設けられている。この突部２５が邪魔をしてガス検知管を正規の接続方向と逆向きにガス吸引ポンプへ接続できないので、作業ミスは生じない。   This gas detection tube 24 is provided with a projection (corresponding means) 25 for preventing connection along the outer peripheral surface of the glass tube 12 on the suction unit 15 side. Since the protrusion 25 obstructs the gas detection tube and cannot be connected to the gas suction pump in the direction opposite to the normal connection direction, no operation error occurs.

次に、図３に第３実施例に係るガス検知管２６を示す。この第３実施例において、前記第１実施例のガス検知管１１と同一部分には同一符号を付してその詳細は省略する。   Next, FIG. 3 shows a gas detection tube 26 according to the third embodiment. In the third embodiment, the same parts as those of the gas detection tube 11 of the first embodiment are denoted by the same reference numerals and the details thereof are omitted.

このガス検知管２６は、吸引部１５側における、ガラス管１２の外周面に、長手方向に沿った通気漏れ用の突条部（対処手段）２７が設けられている。誤ってガス検知管２６を正規の接続方向と逆向きに接続した場合は、突条部２７の存在によりガス吸引ポンプの吸引口に気密接続できない。つまり、通気漏れが生じて、ガス検知管２６には通気できないこととなり、結果的に有害ガスが発生しない。   The gas detection tube 26 is provided with a protruding portion (handling means) 27 for ventilation leakage along the longitudinal direction on the outer peripheral surface of the glass tube 12 on the suction portion 15 side. If the gas detection tube 26 is mistakenly connected in the direction opposite to the normal connection direction, the gas detection pump 26 cannot be hermetically connected to the suction port of the gas suction pump due to the presence of the protrusion 27. That is, ventilation leakage occurs and the gas detection pipe 26 cannot be ventilated, and as a result, no harmful gas is generated.

次に、図４に第４実施例に係るガス検知管２８を示す。この第４実施例において、前記第１実施例のガス検知管１１と同一部分には同一符号を付してその詳細は省略する。   Next, FIG. 4 shows a gas detection tube 28 according to a fourth embodiment. In the fourth embodiment, the same parts as those of the gas detection tube 11 of the first embodiment are denoted by the same reference numerals and their details are omitted.

このガス検知管２８は、接続部１６側における、ガラス管１２の内部に逆流防止弁（対処手段）２９が設けられている。この逆流防止弁２９は、ガス吸引方向（矢印及び○印方向）には通気が可能であり、また、その逆方向（矢印及び×印方向）には通気ができない仕組みである。従って、誤ってガス検知管２８を正規の接続方向と逆向きに接続した場合には、逆流防止弁２９の存在によりガス検知管２８に通気ができず、有害ガスは発生しない。   The gas detection pipe 28 is provided with a backflow prevention valve (coping means) 29 inside the glass tube 12 on the connection part 16 side. The backflow prevention valve 29 is capable of venting in the gas suction direction (in the direction of the arrow and the circle), and cannot vent in the reverse direction (in the direction of the arrow and the x). Therefore, if the gas detection tube 28 is connected in the reverse direction to the normal connection direction, the gas detection tube 28 cannot be vented due to the presence of the backflow prevention valve 29, and no harmful gas is generated.

なお、逆流防止弁２９は、図４においてはガラス管１２の接続部１６側に設けられているが、設置位置はこの部位に限定されることはなく、吸引部１５側に設けてもよいことは勿論である。   Although the backflow prevention valve 29 is provided on the connection part 16 side of the glass tube 12 in FIG. 4, the installation position is not limited to this part, and may be provided on the suction part 15 side. Of course.

次に、図５に第５実施例に係るガス検知管３０を示す。この第５実施例において、前記第１実施例のガス検知管１１と同一部分には同一符号を付してその詳細は省略する。   Next, FIG. 5 shows a gas detection tube 30 according to a fifth embodiment. In the fifth embodiment, the same parts as those in the gas detection tube 11 of the first embodiment are designated by the same reference numerals and their details are omitted.

このガス検知管３０は、吸引部１５側における、ガラス管１２の内部の縮径した部位に、逆流防止栓（対処手段）３１が嵌着されている。この逆流防止栓３１は、ガス吸引方向（矢印及び○印方向）に通気した場合には、嵌着状態が外れ落ちるので通気が可能となり、また、その逆方向（矢印及び×印方向）は、逆流防止栓３１の嵌着状態が維持されるので、通気ができない。従って、有害ガスは発生しない。   In the gas detection tube 30, a backflow prevention plug (coping means) 31 is fitted to a reduced diameter portion inside the glass tube 12 on the suction part 15 side. When the backflow prevention plug 31 is ventilated in the gas suction direction (the direction of the arrow and the circle), the fitted state falls off, so that the ventilation is possible. Since the fitted state of the backflow prevention plug 31 is maintained, ventilation is not possible. Therefore, no harmful gas is generated.

本発明の第１実施例に係る検知管１１を略示的に示す断面図である。It is sectional drawing which shows roughly the detection tube 11 which concerns on 1st Example of this invention. 本発明の第２実施例に係る検知管２４を略示的に示す断面図である。It is sectional drawing which shows schematically the detection tube 24 which concerns on 2nd Example of this invention. 本発明の第３実施例に係る検知管２６を略示的に示す断面図である。It is sectional drawing which shows schematically the detection tube 26 which concerns on 3rd Example of this invention. 本発明の第４実施例に係る検知管２８を略示的に示す断面図である。It is sectional drawing which shows schematically the detection tube 28 which concerns on 4th Example of this invention. 本発明の第５実施例に係る検知管３０を略示的に示す断面図である。It is sectional drawing which shows schematically the detection tube 30 which concerns on 5th Example of this invention.

符号の説明Explanation of symbols

１１ 第１実施例に係るガス検知管
１２ ガラス管
１３、１４ 端部
１５ 吸引部
１６ 接続部
１７ 検知剤
１８、１９ パッキン
２０ 除去剤
２１ パッキン
２２ 除去剤（対処手段）
２３ パッキン
２４ 第２実施例に係るガス検知管
２５ 突部（対処手段）
２６ 第３実施例に係るガス検知管
２７ 突条部（対処手段）
２８ 第４実施例に係るガス検知管
２９ 逆流防止弁（対処手段）
３０ 第５実施例に係るガス検知管
３１ 逆流防止栓（対処手段）
３２ マーク DESCRIPTION OF SYMBOLS 11 Gas detection tube which concerns on 1st Example 12 Glass tube 13, 14 End part 15 Suction part 16 Connection part 17 Detection agent 18, 19 Packing 20 Remover 21 Packing 22 Remover (coping means)
23 Gasket 24 Gas Detector Pipe According to Second Embodiment 25 Projection (Corrective Means)
26 Gas Detector Tube According to Third Example 27 Projection (Measures)
28 Gas Detector Pipe According to Fourth Embodiment 29 Backflow Prevention Valve (Countermeasure)
30 Gas Detector Tube According to Fifth Example 31 Backflow Prevention Stopper (Countermeasure)
32 mark

Claims (6)

ガラス管の内部に充填された検知剤と、該検知剤の端部にパッキンを介して配設された除去剤とを少なくとも備え、前記ガラス管の両端部は、縮径して溶封した構成のガス検知管であって、
該ガス検知管は、一端部を切り欠くと被測定ガスの吸引部が形成され、他端部を切り欠くとガス吸引ポンプへの接続部が形成されると共に、前記ガス吸引ポンプへの接続方向の誤りに対して適宜に対処できる対処手段が講じられていること
を特徴とするガス検知管。 At least a detection agent filled inside the glass tube and a removal agent disposed at the end of the detection agent via a packing, and both ends of the glass tube are reduced in diameter and sealed Gas detector tube
When the gas detection tube is notched at one end, a suction portion for the gas to be measured is formed, and when the other end is notched, a connection portion to the gas suction pump is formed, and the connection direction to the gas suction pump is The gas detector tube is characterized in that measures are taken to appropriately deal with errors. 前記対処手段は、前記検知剤の前記吸引部側の端部に配設された有害ガス除去用の除去剤であること
を特徴とする請求項１に記載のガス検知管。 The gas detection tube according to claim 1, wherein the coping means is a removal agent for removing harmful gas disposed at an end of the detection agent on the suction portion side. 前記対処手段は、前記吸引部側における、前記ガス検知管の外周面に設けられた接続防止用の突部であること
を特徴とする請求項１に記載のガス検知管。 The gas detection tube according to claim 1, wherein the coping means is a connection preventing protrusion provided on an outer peripheral surface of the gas detection tube on the suction unit side. 前記対処手段は、前記吸引部側における、前記ガス検知管の外周面に設けられた通気漏れ用の突条部であること
を特徴とする請求項１に記載のガス検知管。 2. The gas detection tube according to claim 1, wherein the coping means is a ventilation leak ridge provided on an outer peripheral surface of the gas detection tube on the suction unit side. 前記対処手段は、前記ガス検知管の内部に設けられた逆流防止弁であること
を特徴とする請求項１に記載のガス検知管。 The gas detection tube according to claim 1, wherein the coping means is a backflow prevention valve provided inside the gas detection tube. 前記対処手段は、前記吸引部側における、前記ガス検知管の前記縮径した部位に嵌着された逆流防止栓であること
を特徴とする請求項１に記載のガス検知管。 2. The gas detection tube according to claim 1, wherein the coping means is a backflow prevention plug fitted to the reduced-diameter portion of the gas detection tube on the suction unit side.
JP2008219435A 2008-08-28 2008-08-28 Gas detecting tube Pending JP2010054333A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020201177A (en) * 2019-06-12 2020-12-17 株式会社ガステック Oxygen detecting tube

Citations (6)

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Publication number Priority date Publication date Assignee Title
JPH076973B2 (en) * 1988-06-29 1995-01-30 ドレーゲルヴエルク・アクチエンゲゼルシヤフト Method and apparatus for detecting gaseous components in air
JPH1090247A (en) * 1996-09-11 1998-04-10 Tokyo Gas Co Ltd Detecting agent for tht in fuel gas, its preparing method, and detecting pipe for tht
JP2002340878A (en) * 2001-05-17 2002-11-27 Mitsubishi Heavy Ind Ltd Toxic substance exposure quantity detector
JP2003270236A (en) * 2002-03-14 2003-09-25 Gastec:Kk Gas detection member and gas-concentration measuring apparatus
JP2003344383A (en) * 2002-05-29 2003-12-03 Wako Pure Chem Ind Ltd Reagent for measuring formaldehyde
JP2004085525A (en) * 2002-06-24 2004-03-18 Kajima Corp Method for determining concentration of very small amount ammonia in air

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH076973B2 (en) * 1988-06-29 1995-01-30 ドレーゲルヴエルク・アクチエンゲゼルシヤフト Method and apparatus for detecting gaseous components in air
JPH1090247A (en) * 1996-09-11 1998-04-10 Tokyo Gas Co Ltd Detecting agent for tht in fuel gas, its preparing method, and detecting pipe for tht
JP2002340878A (en) * 2001-05-17 2002-11-27 Mitsubishi Heavy Ind Ltd Toxic substance exposure quantity detector
JP2003270236A (en) * 2002-03-14 2003-09-25 Gastec:Kk Gas detection member and gas-concentration measuring apparatus
JP2003344383A (en) * 2002-05-29 2003-12-03 Wako Pure Chem Ind Ltd Reagent for measuring formaldehyde
JP2004085525A (en) * 2002-06-24 2004-03-18 Kajima Corp Method for determining concentration of very small amount ammonia in air

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020201177A (en) * 2019-06-12 2020-12-17 株式会社ガステック Oxygen detecting tube

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