JPH0639332Y2 - Air bleeding valve for metering pump for gas detector tube - Google Patents
Air bleeding valve for metering pump for gas detector tubeInfo
- Publication number
- JPH0639332Y2 JPH0639332Y2 JP1475090U JP1475090U JPH0639332Y2 JP H0639332 Y2 JPH0639332 Y2 JP H0639332Y2 JP 1475090 U JP1475090 U JP 1475090U JP 1475090 U JP1475090 U JP 1475090U JP H0639332 Y2 JPH0639332 Y2 JP H0639332Y2
- Authority
- JP
- Japan
- Prior art keywords
- protrusion
- air bleeding
- bleeding valve
- outer peripheral
- peripheral surface
- 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 - Lifetime
Links
- 230000000740 bleeding effect Effects 0.000 title claims description 20
- 230000002093 peripheral effect Effects 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 21
- 229920001971 elastomer Polymers 0.000 description 11
- 239000005060 rubber Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 5
- 229920000459 Nitrile rubber Polymers 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Sampling And Sample Adjustment (AREA)
- Details Of Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） 本考案は、真空式のガス検知管用定量ポンプのエア抜き
バルブに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) The present invention relates to an air bleeding valve of a vacuum type metering pump for a gas detection tube.
（従来の技術及びその課題並びに考案の目的） 従来、検知管式ガス測定器に使用される手動式の定量ポ
ンプは、労働環境下におけるガス濃度測定や工程管理の
ためのガス濃度測定或いは各種研究機関でのガス濃度測
定などに用いられてきた。(Prior art, its problems, and the purpose of devising) Conventional manual metering pumps used in detector-type gas measuring instruments are used for measuring gas concentration in a working environment, measuring gas concentration for process control, or conducting various researches. It has been used for gas concentration measurement at institutions.
このガス検知管用定量ポンプには、予め被験ガスを検知
管内に吸引後、操作ハンドルの等速送りにより当該ガス
をガス検知管へ送出する送入式のものと、検知管を介し
て被験ガスをポンプ内に一気に吸引する真空式のものと
があった。上記の定量ポンプの内で前者、即ち送入式の
ものは、操作ハンドルを等速で押圧して被験ガスをガス
検知管に送出するので、熟練を要し、操作が煩雑であっ
た。そのため、最近では、操作が簡単な上記の真空式の
ガス検知管用定量ポンプが主流となっている。This gas detection tube metering pump has a feed-in type pump that sucks the test gas into the detection tube in advance, and then sends the gas to the gas detection tube by constant-speed feeding of the operating handle, and the test gas through the detection tube. There was a vacuum type that sucked into the pump all at once. The former of the above-mentioned metering pumps, that is, the feed-in type pump, requires a skill and is complicated to operate because the test gas is sent to the gas detection tube by pressing the operation handle at a constant speed. Therefore, recently, the above-mentioned vacuum type metering pump for a gas detection tube, which is easy to operate, has become the mainstream.
ところで、この真空式のガス検知管用定量ポンプは、通
常、筒の径が約40mmで、内容積が100mlであり、実際の
ガス濃度測定にあたって被験ガスの吸引操作を行い、測
定終了後、吸入した空気を排出する際に勢いよく排気操
作を行うと高圧となったポンプ内の圧力が逃げ場を求め
てガス導入孔側に逆流してガス検知管を吹き飛ばすこと
があった。そのため、ガス検知管用定量ポンプには、通
常、安全対策としてピストン部にエア抜きバルブが設け
られていた。By the way, this vacuum type metering pump for gas detection tube usually has a cylinder diameter of about 40 mm and an internal volume of 100 ml, and when the actual gas concentration is measured, the test gas is sucked and then sucked after the measurement is completed. When the exhaust operation was performed vigorously when exhausting air, the pressure in the pump, which became high pressure, sometimes flowed back to the gas introduction hole side in search of an escape site and blows off the gas detector tube. Therefore, the metering pump for the gas detection tube is usually provided with an air bleeding valve in the piston portion as a safety measure.
このような従来のガス検知管用定量ポンプのエア抜きバ
ルブ１は、第５図に示す如く、ピストン部２に設けられ
た透孔３のシャフト４側開口に設けられており、このエ
ア抜きバルブ１は、弾性を有する平板状ゴム体1aと、該
ゴム体1aの押え金具1bと、上記ゴム体1aと押え金具1bと
を重合してピストン部２のネジ穴に取り付けるためのネ
ジ部材1cとにより構成されるものであった。As shown in FIG. 5, the air bleeding valve 1 of such a conventional metering pump for a gas detecting tube is provided at the opening of the through hole 3 provided in the piston portion 2 on the shaft 4 side. Is composed of an elastic flat rubber body 1a, a holding metal fitting 1b of the rubber body 1a, and a screw member 1c for superposing the rubber body 1a and the holding metal fitting 1b to attach to the screw hole of the piston portion 2. It was composed.
しかしながら、上記従来のエア抜きバルブにあっては、
ゴム体1aは約0.5×1cm程度のものであり、又押え金具1b
は約0.5×0.5cm程度の小寸法のものであるので、該ゴム
体1a及び押え金具1bの取り付けは面倒であり、しかも、
この取り付けが正確でないとバルブとしての信頼性が低
下する点、又長期間使用するとゴム体1aがそり返り空気
漏れの原因になる点、更にネジ部材1cは使用中に緩解す
る虞れがあるので定期的にチェックする保守を必要とす
る点に課題があった。However, in the above conventional air bleeding valve,
The rubber body 1a is about 0.5 x 1 cm, and the holding metal fitting 1b
Is a small size of about 0.5 × 0.5 cm, it is troublesome to attach the rubber body 1a and the holding metal fitting 1b, and
If this mounting is not accurate, the reliability of the valve will decrease, and if it is used for a long period of time, the rubber body 1a will bend back and cause air leakage, and the screw member 1c may loosen during use. There was a problem in that it requires maintenance that is regularly checked.
本考案は、このような従来の課題に鑑み、これを解消す
るためになされたものであり、エア抜きバルブの取り付
け作業を容易にすると共に、信頼性を向上させ且つメイ
ンテナンスフリーをもたらすガス検知管用定量ポンプの
エア抜きバルブを提供することを目的とするものであ
る。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has been made in order to solve the problems. For the gas detector pipe, the work of attaching the air bleeding valve is facilitated, and the reliability is improved and maintenance-free is provided. The purpose is to provide an air bleeding valve for a metering pump.
（課題を解決するための手段） 本考案は、上記の課題を解消し、上記目的を達成するた
めになされたものであり、その要旨とするところは、中
空円筒状ケーシングと、該ケーシング内に嵌装されたピ
ストン部を有するシャフトと、前記ケーシングの一方の
端部に装着されたガス導入孔を有する案内筒と、該案内
筒に装着され、上記ガス導入孔に連通する検知管の端部
収容体と、前記ケーシングの他方の端部に装着されてい
て上記シャフトを挿通自在に支持する支持筒と、該支持
筒の外部に且つ上記シャフトの端部に固着された操作ハ
ンドルとを備え、前記ピストン部に透孔を設け、該透孔
のシャフト側出口にエア抜きバルブを設けたガス検知管
用定量ポンプのエア抜きバルブにおいて、前記ピストン
部のシャフト側に、該ピストン部より径の小さい外周面
を有する突起部が一体に形成され、前記透孔における一
方の開口が上記ピストン部の案内筒側端面に形成され且
つ他方の開口が上記突起部の外周面に形成され、かつ前
記エア抜きバルブが弾性を有するリング体で構成され、
該リング体が上記突起部の外周面に装着されたことを特
徴とする、ガス検知管用定量ポンプのエア抜きバルブに
存する。(Means for Solving the Problems) The present invention has been made to solve the above problems and achieve the above objects, and its gist is to provide a hollow cylindrical casing and a casing inside the casing. A shaft having a fitted piston portion, a guide cylinder having a gas introduction hole attached to one end of the casing, and an end of a detection pipe attached to the guide cylinder and communicating with the gas introduction hole. A housing, a support cylinder attached to the other end of the casing to support the shaft so that the shaft can be inserted therethrough, and an operation handle fixed to the outside of the support cylinder and to the end of the shaft, In an air bleeding valve of a metering pump for gas detection pipe, wherein a through hole is provided in the piston portion and an air bleeding valve is provided at the shaft side outlet of the through hole, a piston having a diameter larger than that of the piston portion is provided on the shaft side of the piston portion. A projecting portion having a small outer peripheral surface is integrally formed, one opening of the through hole is formed on a guide cylinder side end surface of the piston portion, and the other opening is formed on the outer peripheral surface of the projecting portion, and the air The extraction valve is composed of an elastic ring body,
The air vent valve of a metering pump for a gas detection tube is characterized in that the ring body is attached to the outer peripheral surface of the protrusion.
また、前記突起部の外周面に、凹状溝を形成し、該凹状
溝の一部に、前記透孔のシャフト側開口を形成し、上記
凹状溝の開口部を覆うように上記リング体を装着するこ
とが好ましい。Further, a concave groove is formed on the outer peripheral surface of the protrusion, a shaft side opening of the through hole is formed in a part of the concave groove, and the ring body is attached so as to cover the opening of the concave groove. Preferably.
さらに、前記突起部の遊端部にフランジを形成し、該フ
ランジにより前記リング体を上記突起部の外周面に位置
決め配置させることが好ましい。Further, it is preferable that a flange is formed at a free end portion of the protrusion, and the ring body is positioned and arranged on the outer peripheral surface of the protrusion by the flange.
（作用） このように構成される本考案のガス検知管用定量ポンプ
のエア抜きバルブは、所謂リングバルブであり、ピスト
ン部のシャフト側に一体に形成される突起部の外周面に
リング体自体の弾性力により装着される構造となり、上
記突起部の外周面に形成される透孔のシャフト側開口を
常態的にはシールすることとなる。(Operation) The air bleeding valve of the metering pump for a gas detecting pipe of the present invention configured as described above is a so-called ring valve, and the ring body itself is formed on the outer peripheral surface of the protrusion integrally formed on the shaft side of the piston portion. The structure is mounted by elastic force, and the shaft side opening of the through hole formed on the outer peripheral surface of the protrusion is normally sealed.
また、ピストン部のシャフト側に一体に形成される突起
部の外周面に、凹状溝を形成し、該凹状溝の一部に、前
記透孔のシャフト側開口を形成し、上記凹状溝の開口部
を覆うように上記リング体を装着する構造とすれば、吸
引操作の際には、上記透孔のシャフト側開口の凹状溝を
介して高圧のエアがリング体の裏面に一様にかかること
となるので、リング体が突起部の外周面からずれること
が少なくなる。In addition, a concave groove is formed on the outer peripheral surface of the protrusion integrally formed on the shaft side of the piston portion, and the shaft side opening of the through hole is formed in a part of the concave groove, and the opening of the concave groove is formed. If the ring body is mounted so as to cover the portion, high-pressure air is uniformly applied to the back surface of the ring body through the concave groove of the shaft side opening of the through hole during the suction operation. Therefore, the ring body is less likely to be displaced from the outer peripheral surface of the protrusion.
さらに、前記突起部の遊端部にフランジを形成し、該フ
ランジにより前記リング体を上記突起部の外周面に位置
決め配置させる構造とすれば、突起部の外周面に装着さ
れたリング体が定量ポンプの使用中に次第にずれてしま
う可能性はなくなり、従ってリング体が充分な弾性を失
わない限り、常にその機能を完全に発揮することとな
る。Further, if a structure is adopted in which a flange is formed at the free end of the protrusion and the flange is used to position and arrange the ring body on the outer peripheral surface of the protrusion, the ring body mounted on the outer peripheral surface of the protrusion is fixed. The possibility of gradual displacement during use of the pump is eliminated, so that the ring body will always fulfill its function unless it loses sufficient elasticity.
（実施例） 次に、本考案の実施例を第１図乃至第４図を参照しなが
ら詳細に説明する。(Embodiment) Next, an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.
第１図乃至第３図は、本考案の第１実施例を示すもので
ある。該第１実施例のガス検知管用定量ポンプＡは、中
空円筒状のケーシング10を備え、該ケーシング10内には
ピストン部11と、これを支持するシャフト12とが嵌装さ
れている。前記ケーシング10の一端には案内筒13が取り
付けられており、該案内筒13の中心部には環状凹部14が
形成され、該環状凹部14の中心にガス導入孔15が形成さ
れている。上記環状凹部14には、検知管の端部を収容す
る筒状ゴム体16と該ゴム体16を保持する保持具17とから
なる検知管の端部収容体18が取り付けられ、上記ガス導
入孔15と筒状ゴム体16とは連通状態となっている。1 to 3 show a first embodiment of the present invention. The gas detecting pipe metering pump A according to the first embodiment includes a hollow cylindrical casing 10 in which a piston portion 11 and a shaft 12 supporting the piston portion 11 are fitted. A guide cylinder 13 is attached to one end of the casing 10, an annular recess 14 is formed in the center of the guide cylinder 13, and a gas introduction hole 15 is formed in the center of the annular recess 14. The annular recess 14 is fitted with an end container 18 of the detection tube, which is composed of a tubular rubber body 16 that houses the end of the detection tube and a holder 17 that holds the rubber body 16, and the gas introduction hole. 15 and the tubular rubber body 16 are in communication with each other.
前記ピストン部11のシャフト側には、第２図に示す如
く、該ピストン部11より径の小さい外周面20を有する突
起部21が一体に設けられている。上記ピストン部11と突
起部21内には、透孔22が設けられており、該透孔22にお
ける一方の開口部は上記ピストン部11の案内筒13側端面
に形成され、他方の開口部は上記突起部21の外周面20に
形成されている。また、前記突起部21の外周面20には、
凹状溝23が形成され、該凹状溝23の一部には、前記透孔
22のシャフト側開口部が形成されており、上記凹状溝23
の開口部を覆うように弾性を有するリング体24からなる
エア抜きバルブ25が前記突起部21の外周面20に装着され
ている。前記リング体24としては、被験ガスの性質を考
慮して例えば、耐薬品性を有し、厚さが0.3〜0.5mm程度
のニトリルラバー（NR）、ニトリルブタジエンラバー
（NBR）、クロロプレンラバー（CR）等の合成ゴム製帯
状リングが使用される。As shown in FIG. 2, a projection portion 21 having an outer peripheral surface 20 having a diameter smaller than that of the piston portion 11 is integrally provided on the shaft side of the piston portion 11. A through hole 22 is provided in the piston portion 11 and the projection portion 21, one opening portion of the through hole 22 is formed at the end surface of the piston portion 11 on the guide cylinder 13 side, and the other opening portion is formed. It is formed on the outer peripheral surface 20 of the protrusion 21. Further, on the outer peripheral surface 20 of the protrusion 21,
A concave groove 23 is formed, and the through hole is formed in a part of the concave groove 23.
The shaft side opening of 22 is formed, and the concave groove 23 is formed.
An air bleeding valve 25 composed of a ring body 24 having elasticity is attached to the outer peripheral surface 20 of the projection 21 so as to cover the opening. The ring body 24 has, for example, chemical resistance and a thickness of about 0.3 to 0.5 mm, nitrile rubber (NR), nitrile butadiene rubber (NBR), and chloroprene rubber (CR) in consideration of the properties of the test gas. ) Etc. synthetic rubber strip ring is used.
前記ケーシング10の他端には、前記シャフト12を挿通自
在に支持するための挿通孔26を有する支持筒27が取り付
けられている。該支持筒27の外部に突出するシャフト12
の端部には、操作ハンドル28が固着されている。At the other end of the casing 10, a support cylinder 27 having an insertion hole 26 for supporting the shaft 12 so that the shaft 12 can be inserted is attached. The shaft 12 protruding to the outside of the support cylinder 27
An operation handle 28 is fixed to the end of the.
このように構成される本実施例のエア抜きバルブは、リ
ング体24の弾性作用によりピストン部11のシャフト12側
に一体に形成される突起部21の外周面20に装着されて透
孔22のシャフト側開口を常態的にはシールするものとな
り、しかも、吸引操作の際には、上記透孔22のシャフト
側開口から凹状溝23を介して高圧のエアがリング体24の
裏面にかかることになるので、リング体24が突起部21の
外周面20からずれることがない。The air bleeding valve of this embodiment configured as described above is mounted on the outer peripheral surface 20 of the projection 21 integrally formed on the shaft 12 side of the piston portion 11 by the elastic action of the ring body 24, and the through hole 22 The opening on the shaft side is normally sealed, and during suction operation, high-pressure air is applied to the back surface of the ring body 24 from the opening on the shaft side of the through hole 22 through the concave groove 23. Therefore, the ring body 24 is not displaced from the outer peripheral surface 20 of the protrusion 21.
また、定量ポンプＡの使用にあたっては、従来と同様に
両端を切断したガズ検知管を筒状ゴム体16に挿入して保
持し、操作ハンドル28を一気に吸引操作して上記ガス検
知管内に収容される検知剤の変色等によりガス濃度を測
定するものである。Further, when the metering pump A is used, the gas detection tube whose both ends are cut is inserted into the tubular rubber body 16 and held as in the conventional case, and the operation handle 28 is sucked at once to be housed in the gas detection tube. The gas concentration is measured by the color change of the detection agent.
第４図は、本考案の第２実施例を示す要部断面図であ
る。該第２実施例のガス検知管用定量ポンプＢは、前記
突起部21の遊端部にフランジ21aを形成し、該フランジ2
1aにより前記リング体24を該突起部21の外周面20に位置
決め配置させた点でのみ前記第１実施例の定量ポンプＡ
と相違する。このような構成とすれば、突起部21の外周
面20にリング体24を装着する場合に、その定置が目視確
認でき且つ定量ポンプＡの使用中に、リング体24が突起
部21の外周面20からずれることは確実に防止される。FIG. 4 is a sectional view of the essential parts showing a second embodiment of the present invention. The metering pump B for a gas detecting tube according to the second embodiment has a flange 21a formed at the free end of the protrusion 21.
The metering pump A according to the first embodiment is provided only in that the ring body 24 is positioned and arranged on the outer peripheral surface 20 of the projection 21 by 1a.
Is different from. With such a configuration, when the ring body 24 is mounted on the outer peripheral surface 20 of the protrusion 21, the stationary state can be visually confirmed and the ring body 24 is disposed on the outer peripheral surface of the protrusion 21 during use of the metering pump A. The deviation from 20 is surely prevented.
尚、本考案は、上述のように構成され、使用されるもの
であるが、前述の実施例に限定されるものではなく、本
考案の基本的技術思想を逸脱しない範囲で種々の設計変
更及び使用が可能である。Although the present invention is configured and used as described above, it is not limited to the above-described embodiments, and various design changes and modifications can be made without departing from the basic technical idea of the present invention. It can be used.
（考案の効果） 本考案のガス検知管用定量ポンプのエア抜きバルブは、
ピストン部のシャフト側に一体に形成される突起部の外
周面に弾性を有するリング体を装着することにより取り
付けが完了することとなるので、従来のネジ部材による
取り付けよりも取付作業を極めて容易にでき、しかも透
孔の開口は上記のリング体でシールされるので、従来の
平板状ゴム体によるシールに較べてシールの信頼性を更
に向上させることができる。(Effect of the device) The air vent valve of the metering pump for gas detector tube of the present invention is
Since the mounting is completed by mounting the elastic ring body on the outer peripheral surface of the protruding portion integrally formed on the shaft side of the piston portion, the mounting work is much easier than the conventional screw member mounting. Moreover, since the opening of the through hole is sealed by the ring body, the reliability of the seal can be further improved as compared with the conventional sealing by the flat rubber body.
また、ピストン部のシャフト側に一体に形成される突起
部の外周面に、凹状溝を形成し、該凹状溝の一部に、透
孔のシャフト側開口を形成して、上記凹状溝の開口部を
覆うように上記のリング体を装着すれば、吸引操作の際
には、透孔のシャフト側開口から凹状溝を介して高圧の
エアがリング体の裏面にかかることとなるので、リング
体が突起部の外周面からずれる虞れはなくなる。In addition, a concave groove is formed on the outer peripheral surface of the protrusion integrally formed on the shaft side of the piston portion, and a shaft side opening of a through hole is formed in a part of the concave groove, and the opening of the concave groove is formed. If the above ring body is attached so as to cover the portion, high pressure air will be applied to the back surface of the ring body from the opening of the through hole on the shaft side through the concave groove during the suction operation. There is no risk that the slip will shift from the outer peripheral surface of the protrusion.
さらに、前記突起部の遊端部にフランジを形成し、該フ
ランジにより前記リング体を上記突起部の外周面に位置
決め配置させる構造とすれば、突起部の外周面に装着さ
れたリング体が定量ポンプの使用中に定位置からずれる
ことが確実に防止できるためにバルブに関しては完全に
メインテナンスフリーのものとなる。Further, if a structure is adopted in which a flange is formed at the free end of the protrusion and the flange is used to position and arrange the ring body on the outer peripheral surface of the protrusion, the ring body mounted on the outer peripheral surface of the protrusion is fixed. The valve is completely maintenance free as it can be reliably prevented from moving out of position during use of the pump.
図面は本考案の実施例を示すものであり、第１図は第１
実施例の横断面図、第２図は同要部断面図、第３図は同
正面図、第４図は第２実施例の要部断面図、第５図は従
来のガス検知管用定量ポンプのエア抜きバルブを示す断
面図である。 Ａ、Ｂ……ガス検知管用定量ポンプ、 10……ケーシング、11……ピストン部、 12……シャフト、13……案内筒、 14……ガス導入孔、 18……検知管の端部収容体、 21……突起部、21a……フランジ、 22……透孔、23……凹状溝、 24……リング体、25……エア抜きバルブ、 27……支持筒、28……操作ハンドル。The drawings show an embodiment of the present invention, and FIG.
FIG. 2 is a cross-sectional view of the embodiment, FIG. 2 is a cross-sectional view of the same main portion, FIG. 3 is a front view of the same, FIG. 4 is a cross-sectional view of the main portion of the second embodiment, and FIG. 3 is a cross-sectional view showing the air bleeding valve of FIG. A, B ... Metering pump for gas detection tube, 10 ... Casing, 11 ... Piston part, 12 ... Shaft, 13 ... Guide tube, 14 ... Gas introduction hole, 18 ... Detector tube end container , 21 ... Protrusion, 21a ... Flange, 22 ... Through hole, 23 ... Concave groove, 24 ... Ring body, 25 ... Air bleeding valve, 27 ... Support tube, 28 ... Operation handle.
Claims (3)
に嵌装されたピストン部を有するシャフトと、前記ケー
シングの一方の端部に装着されたガス導入孔を有する案
内筒と、該案内筒に装着され、上記ガス導入孔に連通す
る検知管の端部収容体と、前記ケーシングの他方の端部
に装着されていて上記シャフトを挿通自在に支持する支
持筒と、該支持筒の外部に且つ上記シャフトの端部に固
着された操作ハンドルとを備え、前記ピストン部に透孔
を設け、該透孔のシャフト側出口にエア抜きバルブを設
けたガス検知管用定量ポンプのエア抜きバルブにおい
て、前記ピストン部のシャフト側に、該ピストン部より
径の小さい外周面を有する突起部が一体に形成され、前
記透孔における一方の開口が上記ピストン部の案内筒側
端面に形成され且つ他方の開口が上記突起部の外周面に
形成され、かつ前記エア抜きバルブが弾性を有するリン
グ体で構成され、該リング体が上記突起部の外周面に装
着されたことを特徴とする、ガス検知管用定量ポンプの
エア抜きバルブ。1. A hollow cylindrical casing, a shaft having a piston portion fitted in the casing, a guide cylinder having a gas introduction hole attached to one end of the casing, and the guide cylinder. An end-portion housing of a detection pipe that is mounted and communicates with the gas introduction hole, a support cylinder that is mounted on the other end of the casing and supports the shaft so that the shaft can be inserted therethrough, and outside the support cylinder. An air bleeding valve of a metering pump for a gas detection tube, comprising: an operation handle fixed to an end of the shaft; a piston having a through hole; and an air bleeding valve provided at the shaft side outlet of the through hole. A protrusion having an outer peripheral surface having a smaller diameter than that of the piston is integrally formed on the shaft side of the piston, and one opening of the through hole is formed on a guide cylinder side end surface of the piston. One opening is formed on the outer peripheral surface of the protrusion, and the air bleeding valve is formed of an elastic ring body, and the ring body is mounted on the outer peripheral surface of the protrusion. Air bleeding valve for metering pump for detector tube.
該凹状溝の一部に、前記透孔のシャフト側開口が形成さ
れており、上記凹状溝の開口部を覆うように上記リング
体が装着されていることを特徴とする、請求項（１）に
記載のガス検知管用定量ポンプのエア抜きバルブ。2. A concave groove is formed on the outer peripheral surface of the protrusion,
The shaft-side opening of the through hole is formed in a part of the recessed groove, and the ring body is mounted so as to cover the opening of the recessed groove. Air bleeding valve of the metering pump for gas detector tube described in.
該フランジにより前記リング体を上記突起部の外周面に
位置決め配置させたことを特徴とする、請求項（１）又
は（２）に記載のガス検知管用定量ポンプのエア抜きバ
ルブ。3. A flange is formed at the free end of the protrusion,
The air bleeding valve for a metering pump for a gas detection tube according to claim 1, wherein the ring body is positioned and arranged on the outer peripheral surface of the protrusion by the flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1475090U JPH0639332Y2 (en) | 1990-01-09 | 1990-02-19 | Air bleeding valve for metering pump for gas detector tube |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2-355 | 1990-01-09 | ||
| JP35590 | 1990-01-09 | ||
| JP1475090U JPH0639332Y2 (en) | 1990-01-09 | 1990-02-19 | Air bleeding valve for metering pump for gas detector tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03115851U JPH03115851U (en) | 1991-12-02 |
| JPH0639332Y2 true JPH0639332Y2 (en) | 1994-10-12 |
Family
ID=31889726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1475090U Expired - Lifetime JPH0639332Y2 (en) | 1990-01-09 | 1990-02-19 | Air bleeding valve for metering pump for gas detector tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639332Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4518439B1 (en) * | 2009-08-13 | 2010-08-04 | 明 山田 | Containers with squeezed pieces and methods for making them. |
| CN108426752A (en) * | 2018-06-22 | 2018-08-21 | 杨宁 | Solution gas negative pressure sampler |
-
1990
- 1990-02-19 JP JP1475090U patent/JPH0639332Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03115851U (en) | 1991-12-02 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |