JPS643072Y2 - - Google Patents
Info
- Publication number
- JPS643072Y2 JPS643072Y2 JP1981090740U JP9074081U JPS643072Y2 JP S643072 Y2 JPS643072 Y2 JP S643072Y2 JP 1981090740 U JP1981090740 U JP 1981090740U JP 9074081 U JP9074081 U JP 9074081U JP S643072 Y2 JPS643072 Y2 JP S643072Y2
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- cap
- tip
- periphery
- distal end
- 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
Links
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 239000007788 liquid Substances 0.000 description 10
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 239000011521 glass Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Description
【考案の詳細な説明】
本考案は、溶存アンモニア電極、溶存CO2電
極、残留塩素計等の隔膜式ガスセンサーの隔膜保
持構造に関する。[Detailed Description of the Invention] The present invention relates to a diaphragm holding structure for a diaphragm type gas sensor such as a dissolved ammonia electrode, a dissolved CO 2 electrode, and a residual chlorine meter.
これらガスセンサーにおいては、使用頻度に応
じて適宜隔膜を交換する必要があり、従来は第1
図に示すように、ボデイ21の先端側に、隔膜押
さえ部22を備えたキヤツプ23を着脱自在に螺
着し、そのネジ込みにより、ボデイ21の端面と
隔膜押さえ部22との間に、O−リング24とパ
ツキング25で挾む状態で隔膜26を挾圧保持さ
せるとか、あるいは、第2図に示すように、2個
のO−リング24,24で挾む状態でパツキング
25を設けると共に、パツキング25及び一方の
O−リング24と隔膜押さえ部22間に隔膜26
を位置させ、キヤツプ23のネジ込みによつて隔
膜26を挾圧保持させるようにしている。ところ
が、いずれにおいても、その取付けに伴うキヤツ
プ23のネジ込みに起因して隔膜26に捩れ力が
作用し、しわが発生したり一部が破損してシール
が不十分となり、そこを通じて試料液が不測に流
入し、測定精度が低下する問題があつた。又、O
−リングだけで隔膜をシールするため、シールが
不充分で長期間連続測定を行なう場合など試料液
がリークすることがあつた。 In these gas sensors, it is necessary to replace the diaphragm as appropriate depending on the frequency of use.
As shown in the figure, a cap 23 equipped with a diaphragm holding part 22 is removably screwed onto the distal end side of the body 21, and by screwing the cap 23, an O - Holding the diaphragm 26 under pinching pressure while sandwiching it between the ring 24 and the packing 25, or as shown in FIG. A diaphragm 26 is provided between the packing 25 and one O-ring 24 and the diaphragm holding part 22.
The diaphragm 26 is held under clamping pressure by screwing in the cap 23. However, in both cases, twisting force is applied to the diaphragm 26 due to the screwing of the cap 23 during its installation, causing wrinkles and partial damage, resulting in insufficient sealing, and the sample liquid is not allowed to flow through the diaphragm 26. There was a problem in which measurement accuracy decreased due to unexpected inflow. Also, O
- Because the diaphragm was sealed only with a ring, the seal was insufficient and the sample liquid sometimes leaked when continuous measurements were performed for a long period of time.
本考案は、上記の点に鑑み、シール不良を招く
事無く隔膜を保持できるようにすることを目的と
する。 In view of the above points, it is an object of the present invention to enable the diaphragm to be held without causing seal failure.
次に、本考案実施の態様を例示図に基いて詳述
する。 Next, embodiments of the present invention will be described in detail based on illustrative drawings.
第3図に示すように、筒状ボデイ1の先端側
に、ガスは透過するが液体、イオンは透過しない
隔膜(たとえばテフロン(商品名)製)2を保持
した筒状キヤツプ3を着脱自在に取付け、前記ボ
デイ1の内部に、先端を隔膜2に押付けるように
コイルバネ4を介して付勢する状態でPHガラス電
極(ガラス電極と比較電極を複合一体化した複合
電極でもよい。)5を内装すると共に、塩化カリ
ウムと塩化アンモニウムとの混合溶液から成る内
部液6を充填し、前記PHガラス電極5の先端側に
銀と塩化銀から成る比較電極7を付設し、その比
較電極7にリード線8を接続し、もつて、前記隔
膜2を試料液中に浸漬し、試料液中の溶存アンモ
ニアガスが隔膜2を透過するようにして試料液中
の溶存アンモニアガスの濃度を測定できる工業用
または実験用の溶存アンモニア電極を構成してあ
る。そして、前記キヤツプ3に隔膜押さえ部材9
が一体接着され、両者3,9によつて隔膜2が保
持されている。 As shown in FIG. 3, a cylindrical cap 3 holding a diaphragm 2 (for example, made of Teflon (trade name)) that allows gas to pass through but not liquids or ions to pass through is attached to and detached from the tip of the cylindrical body 1. Attach the PH glass electrode (it may be a composite electrode made by integrating a glass electrode and a reference electrode) 5 into the body 1, with the tip pressed against the diaphragm 2 through the coil spring 4. At the same time, an internal solution 6 consisting of a mixed solution of potassium chloride and ammonium chloride is filled, a comparison electrode 7 made of silver and silver chloride is attached to the tip side of the PH glass electrode 5, and a lead is connected to the comparison electrode 7. For industrial use, the concentration of dissolved ammonia gas in the sample liquid can be measured by connecting the wire 8 and immersing the diaphragm 2 in the sample liquid so that the dissolved ammonia gas in the sample liquid passes through the diaphragm 2. Alternatively, it is configured as a dissolved ammonia electrode for experimental use. Then, a diaphragm pressing member 9 is attached to the cap 3.
are integrally bonded together, and the diaphragm 2 is held by both 3 and 9.
即ち、第4図に示すように、前記キヤツプ3の
先端側に小径筒部3aが形成され、その小径筒部
3aの先端面f1に環状溝10が穿設形成されると
共にそこにO−リング11が嵌入されている。他
方、前記隔膜押さえ部材9は、試料液を通すため
の中央穴12と、この穴12の周縁に位置し、且
つ前記小径筒部3aの先端面f1に対向する端面F1
を有する環状部分9aと、内面F2が小径筒部3
aの先端部外壁f2に当接される側壁部分9bとを
備えている。又、この隔膜押さえ部材9には前記
キヤツプ3の大径筒部3bと小径筒部3aとの間
に形成される環状端面f3に対向する端面F3が設け
られている。 That is, as shown in FIG. 4, a small-diameter cylindrical portion 3a is formed on the distal end side of the cap 3, and an annular groove 10 is formed in the distal end surface f1 of the small-diameter cylindrical portion 3a. A ring 11 is fitted. On the other hand, the diaphragm holding member 9 has a central hole 12 for passing the sample liquid, and an end surface F 1 located at the periphery of this hole 12 and opposite to the tip surface f 1 of the small diameter cylindrical portion 3a.
an annular portion 9a having a
and a side wall portion 9b that comes into contact with the outer wall f 2 of the distal end portion of a. The diaphragm holding member 9 is also provided with an end face F 3 that faces the annular end face f 3 formed between the large diameter cylindrical portion 3 b and the small diameter cylindrical portion 3 a of the cap 3 .
そして、キヤツプ3に隔膜2を保持させるに
は、まず環状溝10内にO−リング11を嵌入し
た後、前記キヤツプ3の小径筒部3aの先端面
f1、先端部外壁f2、環状端面f3のそれぞれに撥水
性の接着剤(例えばシリコン系接着剤)Sを塗布
し、次いで、その外方から隔膜2をあてがい、更
に、環状部分9aの端面F1、側壁部分9bの内
面F2、端面F3のそれぞれに前記接着剤Sを塗布
した隔膜押さえ部材9を、前記隔膜2及びキヤツ
プ3の外方から被着し、前記環状端面f3と端面
F3、先端部外壁f2と側壁部分9bの内面F2、小径
筒部3aの先端面f1と隔膜周縁部上面、環状部分
9aの端面F1と隔膜周縁部下面とをそれぞれ接
着剤Sにより接着するのである。尚、前記ボデイ
1の先端側に、外周にネジ部13を形成した小径
部1aを形成し、他方、前記キヤツプ3の基端側
に前記ネジ部13に螺着するための内ネジ部14
を形成すると共に内ネジ部14の基端部にO−リ
ング15を嵌入する環状段部16を穿設形成して
あり、前記O−リング15を介装した状態でキヤ
ツプ3を螺着し、そのネジ込みに伴い、O−リン
グ15により両ネジ部13,14間に対するシー
ルを図るように構成してある。 In order to hold the diaphragm 2 in the cap 3, first fit the O-ring 11 into the annular groove 10, and then
A water-repellent adhesive (for example, a silicone adhesive) S is applied to each of f 1 , the tip outer wall f 2 , and the annular end face f 3 , and then the diaphragm 2 is applied from the outside, and then the annular portion 9 a is The diaphragm holding member 9 coated with the adhesive S is applied to the end face F 1 , the inner surface F 2 of the side wall portion 9b, and the end face F 3 from the outside of the diaphragm 2 and the cap 3, and the annular end face f 3 and end face
F 3 , the tip outer wall f 2 and the inner surface F 2 of the side wall portion 9b, the tip surface f 1 of the small diameter cylindrical portion 3a and the upper surface of the diaphragm periphery, and the end surface F 1 of the annular portion 9a and the lower surface of the diaphragm periphery with adhesive S. The adhesive is bonded by A small diameter part 1a having a threaded part 13 formed on the outer periphery is formed on the distal end side of the body 1, and an internal threaded part 14 for screwing into the threaded part 13 is formed on the proximal end side of the cap 3.
At the same time, an annular stepped portion 16 into which an O-ring 15 is fitted is formed at the base end of the internal threaded portion 14, and the cap 3 is screwed on with the O-ring 15 interposed therein. When screwed in, the O-ring 15 is configured to provide a seal between the threaded portions 13 and 14.
そして、隔膜2を交換する場合には、キヤツプ
3を隔膜2、隔膜押さえ部材9とともにボデイ1
の先端から取り外し、別の新たなキヤツプ3(隔
膜2、隔膜押さえ部材9付き)をボデイ1に取り
付けるのである。 When replacing the diaphragm 2, the cap 3 is attached to the body 1 together with the diaphragm 2 and the diaphragm holding member 9.
Then, another new cap 3 (with a diaphragm 2 and a diaphragm holding member 9) is attached to the body 1.
又、前記キヤツプ3及び隔膜押さえ部材9は、
夫々プラスチツク製で、接着剤で強固に一体接着
できるものである。 Further, the cap 3 and the diaphragm pressing member 9 are
They are each made of plastic and can be firmly bonded together with adhesive.
本考案は上述したように、筒状キヤツプ3の先
端面に環状溝を形成してこの環状溝内にO−リン
グを嵌入し、さらにその外方から隔膜をあてが
い、中央穴とこの中央穴の周縁に位置して前記隔
膜の周縁部に当接される環状部分と前記キヤツプ
の先端部外壁に当接される側壁部分とを有する隔
膜押さえ部材を前記隔膜及びキヤツプの外方から
被着し、前記隔膜が前記キヤツプの先端面とこの
先端面に対向する前記環状部分の端面との間にお
いてのみ挟持されるようにすると共に、前記キヤ
ツプの先端部外壁と前記側壁部分の内面及び前記
キヤツプの先端面と隔膜周縁部上面ならびに隔膜
周縁部下面と前記環状部分の端面とを夫々接着剤
により接着してあるので、従来のキヤツプをネジ
込んで取り付けるタイプのように、隔膜に捩れ力
が作用することがなく、従つて、未熟練者であつ
ても隔膜にしわや破損のない、即ち試料液のリー
クのおそれのない状態で簡単に隔膜を装着でき
る。しかも、筒状キヤツプ、隔膜、隔膜押さえ部
材が接着剤により一体的に接着されているので、
この接着とキヤツプ先端面に設けられたO−リン
グとの相乗効果により試料液のリークをより確実
に防止できる。 As described above, in the present invention, an annular groove is formed on the distal end surface of the cylindrical cap 3, an O-ring is fitted into the annular groove, and a diaphragm is applied from the outside of the O-ring. a diaphragm holding member having an annular portion located at the periphery and abutting the periphery of the diaphragm and a side wall portion abutting the outer wall of the distal end of the cap from the outside of the diaphragm and the cap; The diaphragm is sandwiched only between the distal end surface of the cap and the end surface of the annular portion opposite to the distal end surface, and the diaphragm is sandwiched between the outer wall of the distal end of the cap, the inner surface of the side wall portion, and the distal end of the cap. Since the surface and the upper surface of the diaphragm periphery and the lower surface of the diaphragm periphery and the end surface of the annular portion are each bonded with an adhesive, torsion force does not act on the diaphragm as in the case of the conventional type where the cap is screwed in. Therefore, even an unskilled person can easily attach the diaphragm without wrinkles or damage to the diaphragm, that is, without fear of sample liquid leakage. Moreover, since the cylindrical cap, diaphragm, and diaphragm holding member are integrally bonded with adhesive,
The synergistic effect of this adhesion and the O-ring provided on the tip end of the cap makes it possible to more reliably prevent leakage of the sample liquid.
そして、本考案においては、特に、隔膜がキヤ
ツプの先端面とこの先端面に対向する環状部分の
端面との間においてのみ挟持されるようにしてあ
るので、隔膜の周縁部に折り曲げ部分やしわ等が
できず、これらに起因して感度が変化したり低下
するといつた不都合がない。 In the present invention, the diaphragm is sandwiched only between the distal end surface of the cap and the end surface of the annular portion facing the distal end surface, so that the diaphragm has folds and wrinkles on its peripheral edge. There is no inconvenience such as changes or decreases in sensitivity due to these factors.
従つて、本考案によれば、試料液が不測にリー
クせず、しかも、高感度で精度よく測定を行うこ
とができる。 Therefore, according to the present invention, the sample liquid does not leak unexpectedly, and measurement can be performed with high sensitivity and accuracy.
図面は本発明の実施の態様を例示するもので、
第1図及び第2図は、夫々、従来例の隔膜保持部
の縦断面図、第3図は本考案にかかるセンサーの
概略縦断面図、第4図は第3図の隔膜保持部の拡
大縦断面図である。
1……筒状ボデイ、2……隔膜、3……筒状キ
ヤツプ、5……電極、9……隔膜押さえ部材、9
a……環状部分、9b……外壁部分、10……環
状溝、11……O−リング、12……中央穴、f1
……キヤツプの先端面、f2……キヤツプの先端部
外壁、F1……環状部分の端面、F2……側壁部分
の内面、S……接着剤。
The drawings illustrate embodiments of the invention, and
1 and 2 are longitudinal cross-sectional views of a conventional diaphragm holding part, respectively, FIG. 3 is a schematic longitudinal cross-sectional view of a sensor according to the present invention, and FIG. 4 is an enlarged view of the diaphragm holding part of Fig. 3. FIG. DESCRIPTION OF SYMBOLS 1... Cylindrical body, 2... Diaphragm, 3... Cylindrical cap, 5... Electrode, 9... Diaphragm holding member, 9
a...Annular part, 9b...Outer wall part, 10...Annular groove, 11...O-ring, 12...Central hole, f 1
...Front end surface of the cap, f 2 ... Outer wall of the cap end, F 1 ... End surface of the annular portion, F 2 ... Inner surface of the side wall portion, S... Adhesive.
Claims (1)
ヤツプ3を着脱自在に設け、このキヤツプ3に隔
膜2を保持させてある隔膜式ガスセンサーにおい
て、前記キヤツプ3の先端面f1に環状溝10を形
成してこの環状溝10内にO−リング11を嵌入
し、さらにその外方から隔膜2をあてがい、中央
穴12とこの中央穴12の周縁に位置して前記隔
膜2の周縁部に当接される環状部分9aと前記キ
ヤツプ3の先端部外壁に当接される側壁部分9b
とを有する隔膜押さえ部材9を前記隔膜2及びキ
ヤツプ3の外方から被着し、前記隔膜2が前記キ
ヤツプ3の先端面f1とこの先端面f1に対向する前
記環状部分9aの端面F1との間においてのみ挟
持されるようにすると共に、前記キヤツプ3の先
端部外壁f2と前記側壁部分9bの内面F2及び前記
キヤツプ3の先端面f1と隔膜周縁部上面ならびに
隔膜周縁部下面と前記環状部分9aの端面F1と
を夫々接着剤Sにより接着してあることを特徴と
する隔膜式ガスセンサー。 In a diaphragm type gas sensor in which a cylindrical cap 3 is detachably provided at the tip of a cylindrical body 1 having an electrode 5 therein, and a diaphragm 2 is held in the cap 3, an annular groove is formed in the tip surface f1 of the cap 3. 10 is formed, and an O-ring 11 is fitted into this annular groove 10, and the diaphragm 2 is applied from the outside thereof, and an O-ring 11 is formed in the central hole 12 and located at the periphery of the central hole 12 and attached to the periphery of the diaphragm 2. An annular portion 9a that abuts and a side wall portion 9b that abuts the outer wall of the tip end of the cap 3.
A diaphragm holding member 9 having a diaphragm holding member 9 is attached from the outside to the diaphragm 2 and the cap 3, and the diaphragm 2 is connected to the tip surface f 1 of the cap 3 and the end surface F of the annular portion 9a opposite to the tip surface f 1 . 1 , and the distal end outer wall f2 of the cap 3, the inner surface F2 of the side wall portion 9b, the distal end surface f1 of the cap 3 , the upper surface of the diaphragm periphery, and the diaphragm periphery. A diaphragm type gas sensor characterized in that the lower surface and the end surface F1 of the annular portion 9a are each bonded with an adhesive S.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981090740U JPS643072Y2 (en) | 1981-06-17 | 1981-06-17 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981090740U JPS643072Y2 (en) | 1981-06-17 | 1981-06-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57201962U JPS57201962U (en) | 1982-12-22 |
JPS643072Y2 true JPS643072Y2 (en) | 1989-01-26 |
Family
ID=29885847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1981090740U Expired JPS643072Y2 (en) | 1981-06-17 | 1981-06-17 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS643072Y2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5197492A (en) * | 1975-01-20 | 1976-08-27 |
-
1981
- 1981-06-17 JP JP1981090740U patent/JPS643072Y2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5197492A (en) * | 1975-01-20 | 1976-08-27 |
Also Published As
Publication number | Publication date |
---|---|
JPS57201962U (en) | 1982-12-22 |
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