JPS6367853B2 - - Google Patents
Info
- Publication number
- JPS6367853B2 JPS6367853B2 JP56089908A JP8990881A JPS6367853B2 JP S6367853 B2 JPS6367853 B2 JP S6367853B2 JP 56089908 A JP56089908 A JP 56089908A JP 8990881 A JP8990881 A JP 8990881A JP S6367853 B2 JPS6367853 B2 JP S6367853B2
- Authority
- JP
- Japan
- Prior art keywords
- probe
- solid electrolyte
- tip
- zirconia
- conduit
- 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
- 239000000523 sample Substances 0.000 claims description 43
- 239000007784 solid electrolyte Substances 0.000 claims description 36
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 42
- 239000007789 gas Substances 0.000 description 18
- 238000005259 measurement Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Measuring Oxygen Concentration In Cells (AREA)
Description
【発明の詳細な説明】 本発明は固体電解質酸素計に関する。[Detailed description of the invention] The present invention relates to a solid electrolyte oxygen meter.
固体電解質酸素計には種々の形式のものが実用
化されているが、その中でも、直接挿入形酸素計
はサンプリング装置を必要としないので、応答性
が良い、ダスト、ドレンによるトラブルが少ない
等の長所を有し、最近注目されている。 There are various types of solid electrolyte oxygen meters in practical use, but among them, direct insertion oxygen meters do not require a sampling device, so they have good response and are less likely to cause troubles due to dust or condensate. It has many advantages and has been attracting attention recently.
第１図は、この種の従来の酸素計における検出
部の構成説明図である。図において、２１は胴部
にさし込み溶接して取付けられたフランジ２２に
よつて炉壁２３に設置されるプローブ、２４はジ
ルコニア、セリア、トリア等による試験管形固体
電解質である。固体電解質２４は、閉塞端をプロ
ーブ１の先端側にして設置され、プローブ１の先
端側と非先端側を隔離する壁を形成している。２
５及び２６は固体電解質の壁の内と外に密着設置
された電極、２７は固体電解質の温度を検出する
温度センサ、２８は固体電解質を加熱するヒータ
である。温度センサ２７、ヒータ２８及び調節部
（図示せず）で温度制御系が構成され、固体電解
質２４が所定の温度に保持され、固体電解質２４
の壁の内と外の酸素濃度差に対応する信号が、電
極２５，２６及びリード線（図示せず）を介して
送出されるようになつている。２９は固体電解質
２４の壁面にダストの付着を防止するためのフイ
ルタ、３０は一端が固体電解質２４の閉塞端（外
側）に位置し、他端がプローブ１の非先端側にあ
つて、校正ガスを固体電解質２４の閉塞端に導入
する管路である。 FIG. 1 is an explanatory diagram of the configuration of a detection section in a conventional oxygen meter of this type. In the figure, 21 is a probe installed on the furnace wall 23 by a flange 22 attached to the body by insert welding, and 24 is a test tube-shaped solid electrolyte made of zirconia, ceria, thoria, or the like. The solid electrolyte 24 is installed with the closed end facing the tip side of the probe 1, and forms a wall separating the tip side and the non-tip side of the probe 1. 2
Reference numerals 5 and 26 designate electrodes that are closely installed inside and outside the walls of the solid electrolyte, 27 a temperature sensor that detects the temperature of the solid electrolyte, and 28 a heater that heats the solid electrolyte. A temperature control system is configured by a temperature sensor 27, a heater 28, and a controller (not shown), and the solid electrolyte 24 is maintained at a predetermined temperature.
A signal corresponding to the difference in oxygen concentration between the inside and outside of the wall is transmitted via electrodes 25, 26 and lead wires (not shown). 29 is a filter for preventing dust from adhering to the wall surface of the solid electrolyte 24; 30 has one end located at the closed end (outside) of the solid electrolyte 24, and the other end located on the non-tip side of the probe 1; This is a conduit that introduces the solid electrolyte into the closed end of the solid electrolyte 24.
ところで、この種の酸素計において、測定精度
を維持するために、固体電解質２４を時折り交換
する必要がある。しかし、従来の検出部は、上記
のように、プローブ１の先端に種々の部品が設置
され複雑な構成となつているので、上記交換作業
が煩わしいものとなつていた。 By the way, in this type of oxygen meter, it is necessary to occasionally replace the solid electrolyte 24 in order to maintain measurement accuracy. However, as described above, the conventional detection section has a complicated structure with various parts installed at the tip of the probe 1, making the replacement work cumbersome.
本発明はかかる点に鑑みてなされたものであ
り、その目的は、固体電解質の交換を簡単に行う
ために、試験管形固体電解質及びこれに一体化さ
れるフランジから成るセルユニツトを、その閉塞
端を先にしてプローブの先端から挿入して固定す
ると共に、校正ガス導入管路を簡単に分離し得る
構成にした固体電解質酸素計を提供するにある。 The present invention has been made in view of the above, and an object of the present invention is to provide a cell unit consisting of a test tube solid electrolyte and a flange integrated with the test tube solid electrolyte at its closed end in order to easily replace the solid electrolyte. To provide a solid electrolyte oxygen meter having a configuration in which the probe is inserted and fixed from the tip of the probe first, and the calibration gas introduction pipe can be easily separated.
上記目的を実現した本発明は、一端がプローブ
の先端近傍に位置し、他端がプローブの非先端側
に突出してプローブ内に設置される管路と、試験
管形固体電解質及びこの固体電解質に一体化され
るフランジから成り、固体電解質の閉塞端をプロ
ーブの先端から挿入してプローブに設置されるセ
ルユニツトと、一端が固体電解質の中空部に挿入
され、他端がプローブの先端近傍に位置する管路
に結合される略Ｕ字形管路と、この管路を支持す
ると共にセルユニツトのフランジに接合し、締付
用具によつてセルユニツトをプローブの先端に固
定するフランジで構成される。 The present invention, which has achieved the above object, includes a conduit installed in the probe with one end located near the tip of the probe and the other end protruding toward the non-tip side of the probe, a test tube-shaped solid electrolyte, and the solid electrolyte. It consists of a flange that is integrated with a cell unit that is installed in the probe by inserting the closed end of the solid electrolyte from the tip of the probe, and a cell unit that has one end inserted into the hollow part of the solid electrolyte and the other end located near the tip of the probe. It consists of a generally U-shaped conduit connected to the conduit, and a flange that supports the conduit and is joined to the flange of the cell unit, and fixes the cell unit to the tip of the probe by means of a fastening tool.
以下、図面を参照し本発明について説明する。 The present invention will be described below with reference to the drawings.
第２図及び第３図は、本発明の一実施例による
酸素計の構成説明図で、第２図は、検出部の要部
説明図、第３図は、その要部の一部拡大説明図で
ある。 2 and 3 are explanatory diagrams of the configuration of an oxygen meter according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of the main part of the detection section, and FIG. 3 is an enlarged explanation of a part of the main part. It is a diagram.
各図において、１は胴部にさし込み溶接して取
付られたフランジ２によつて炉壁３に設置される
プローブ、４は試験管形ジルコニア５及びフラン
ジ６から成り、プローブ１の先端に設置されるセ
ルユニツト、７はジルコニア５を加熱するヒータ
である。尚、図示されていないが、ジルコニア５
の先端部（試験管の底部分）の両側に白金多孔質
電極膜が形成され、この電極によつてジルコニア
３の壁で形成される２室（プローブ１の内と外）
の酸素濃度差に対応する信号が検出され、リード
線を介して外部に出力されるようになつている。
また、ジルコニア５の先端部には、温度センサが
設置されており、このセンサ、調節部及びヒータ
７から成る温度制御系によつてジルコニア５が所
定の温度に制御御されるようになつている。 In each figure, 1 is a probe installed on the furnace wall 3 by a flange 2 attached to the body by insert welding, 4 is a test tube-shaped zirconia 5 and a flange 6, and the probe 1 is attached to the tip of the probe 1. The installed cell unit 7 is a heater that heats the zirconia 5. Although not shown, zirconia 5
A platinum porous electrode film is formed on both sides of the tip (bottom of the test tube), and these electrodes create two chambers (inside and outside of probe 1) formed by walls of zirconia 3.
A signal corresponding to the difference in oxygen concentration is detected and output to the outside via a lead wire.
Further, a temperature sensor is installed at the tip of the zirconia 5, and the zirconia 5 is controlled to a predetermined temperature by a temperature control system consisting of this sensor, an adjustment section, and a heater 7. .
８は直管８ａ及びＵ字形状部８ｂから成る管
路、９はジルコニア５の開口端に設置されるメツ
シユフイルタ、１０はフランジである。フランジ
１０は、管路８のＵ字形状部８ｂをブラケツト１
１を介して支持すると共に、ボルト１２を用いて
セルユニツト４をプローブ１の先端に固定するた
めのものである。この固定状態にて、管路８のＵ
字形状部８ｂの一端はジルコニア５の中空部に位
置し、他端は管路８の直管部８ａの一端に結合す
るようになつている。１３はプローブ１室内にお
いて、ジルコニア５近傍を除いて室内を上下に仕
切る仕切板、１４はプローブ１の非先端部に設置
される有底円筒形蓋である。蓋１４は、仕切板１
３で形成されたプローブ１の各室が個々に独立し
て外気に連通するようになつている。 8 is a conduit consisting of a straight pipe 8a and a U-shaped portion 8b, 9 is a mesh filter installed at the open end of zirconia 5, and 10 is a flange. The flange 10 connects the U-shaped portion 8b of the conduit 8 to the bracket 1.
1 to support the cell unit 4 through the probe 1, and to fix the cell unit 4 to the tip of the probe 1 using a bolt 12. In this fixed state, the U of the pipe line 8
One end of the letter-shaped portion 8b is located in the hollow portion of the zirconia 5, and the other end is connected to one end of the straight pipe portion 8a of the conduit 8. Reference numeral 13 designates a partition plate that partitions the interior of the probe 1 chamber into upper and lower sections except for the vicinity of the zirconia 5, and 14 designates a bottomed cylindrical lid installed at the non-tip portion of the probe 1. The lid 14 is the partition plate 1
Each chamber of the probe 1 formed by the probe 3 is individually and independently communicated with the outside air.
上記の酸素計の検出部において、測定時、プロ
ーブ１の先端は200〜500℃の測定ガスの流れの中
にあり、測定ガスは拡散、対流によつてフイルタ
１０を通してジルコニア５の中に入り、ジルコニ
ア５の内壁に常時接触する。一方、ジルコニア５
の外壁に接触するガス、即ち、プローブ１内部の
空気は、測定ガス、ヒータ７等の熱量によつて加
熱され高温状態（700℃〜850℃）になつているの
で、第１図に示すように、大気→プローブ１の下
の室→プローブ１の先端（ジルコニア５の近傍）
→プローブ１の上の室→大気の対流が形成され
る。このため、ジルコニア５の基準ガス側は、常
時、新鮮な空気に置換され、安定した出力信号が
得られる。尚、上記測定時には、通常、管路８は
密閉状態になつており、管路８内にあるガスは流
動しない。したがつて、管路８の存在は、ジルコ
ニア５内に流入する測定ガスの流れや組成に何ら
影響を与えることがないが、管路８を使つて応答
を早めることができる。即ち、管路８の一端をエ
ジエクタ等の吸気口に接続することによつて、ジ
ルコニア５内への測定ガスの流入が加速されガス
の置換が早くなる。 In the detection section of the oxygen meter described above, during measurement, the tip of the probe 1 is in the flow of the measurement gas at 200 to 500°C, and the measurement gas enters the zirconia 5 through the filter 10 by diffusion and convection. It is always in contact with the inner wall of zirconia 5. On the other hand, zirconia 5
The gas in contact with the outer wall of the probe 1, that is, the air inside the probe 1, is heated by the heat of the measurement gas, heater 7, etc. and reaches a high temperature (700°C to 850°C). , atmosphere → chamber below probe 1 → tip of probe 1 (near zirconia 5)
→Chamber above probe 1→Atmospheric convection is formed. Therefore, the reference gas side of the zirconia 5 is always replaced with fresh air, and a stable output signal can be obtained. Incidentally, at the time of the above measurement, the pipe line 8 is normally in a sealed state, and the gas within the pipe line 8 does not flow. Therefore, the presence of the conduit 8 has no effect on the flow or composition of the measurement gas flowing into the zirconia 5, but the conduit 8 can be used to speed up the response. That is, by connecting one end of the conduit 8 to an inlet of an ejector or the like, the flow of the measurement gas into the zirconia 5 is accelerated and the gas replacement is accelerated.
次に、校正動作及び洗浄動作について説明す
る。 Next, the calibration operation and cleaning operation will be explained.
校正は、測定状態のまま、管路８を介して、測
定ガスよりもやや高い圧力を有する校正ガスをジ
ルコニア５の中に導入しながら行う。校正ガスが
測定ガスよりも高い圧力を有するので、ジルコニ
ア５内における二つのガスの置換が円滑に行わ
れ、正確な校正を行うことができる。 Calibration is performed while a calibration gas having a slightly higher pressure than the measurement gas is introduced into the zirconia 5 through the pipe 8 while the measurement state is maintained. Since the calibration gas has a higher pressure than the measurement gas, the two gases are smoothly replaced within the zirconia 5, allowing accurate calibration.
上記校正ガスに代えて洗浄ガス、例えば計装用
空気を多量に流してやれば、フイルタ１０やジル
コニア５内に付着するダストをブロー・バツクで
除去することができる。 If a large amount of cleaning gas, such as instrumentation air, is flowed in place of the above-mentioned calibration gas, dust adhering to the filter 10 and the zirconia 5 can be removed by blowback.
一方、ジルコニア５の交換は、ボルト１２の螺
合をといて、管路８の直管部８ａとＵ字形状部８
ｂを分離し、セルユニツト４をプローブ１の先端
から引抜いて行う。したがつて、その交換作業が
簡単に行うことができる。 On the other hand, to replace the zirconia 5, the bolts 12 are unscrewed, and the straight pipe part 8a and the U-shaped part 8 of the conduit 8 are replaced.
b is separated and the cell unit 4 is pulled out from the tip of the probe 1. Therefore, the replacement work can be easily performed.
以上、説明したように、本発明の固体電解質酸
素計によれば、試験管形固体電解質及びこれに一
体されるフランジから成るセルユニツトを、その
閉塞端を先にしてプローブの先端さら挿入して固
定する構成となつており、しかも、校正ガス導入
管路をプローブ先端近傍にて分離し得る構成とな
つているので、固体電解質を交換する保守作業が
きわて簡単になつた。 As explained above, according to the solid electrolyte oxygen meter of the present invention, a cell unit consisting of a test tube solid electrolyte and a flange integrated therein is fixed by further inserting the tip of the probe with its closed end first. Furthermore, the calibration gas introduction line can be separated near the tip of the probe, making the maintenance work of replacing the solid electrolyte extremely easy.
第１図は、従来の固体電解質酸素計の検出部の
構成説明図、第２図は、本発明の一実施例による
固体電解質酸素計の検出部の構成説明図、第３図
は、本発明の一実施例による固体電解質酸素計の
検出部の要部拡大説明図である。
１…プローブ、４…セルユニツト、５…試験管
形固体電解質、６…フランジ、７…ヒータ、８…
管路、８ａ…管路の直管部、８ｂ…管路のＵ字形
状部、９…メツシユフイルタ、１０…フランジ、
１１…ブラケツト、１２…ボルト、１３…仕切
板。
FIG. 1 is an explanatory diagram of the configuration of a detection section of a conventional solid electrolyte oxygen meter, FIG. 2 is an explanatory diagram of the configuration of a detection section of a solid electrolyte oxygen meter according to an embodiment of the present invention, and FIG. 3 is an explanatory diagram of the configuration of a detection section of a solid electrolyte oxygen meter according to an embodiment of the present invention. FIG. 2 is an enlarged explanatory view of a main part of a detection section of a solid electrolyte oxygen meter according to an embodiment. DESCRIPTION OF SYMBOLS 1...Probe, 4...Cell unit, 5...Test tube solid electrolyte, 6...Flange, 7...Heater, 8...
Pipe line, 8a... Straight pipe part of the pipe line, 8b... U-shaped part of the pipe line, 9... Mesh filter, 10... Flange,
11... Bracket, 12... Bolt, 13... Partition plate.
Claims (1)
解質で形成される隔壁を有し、該プローブの内と
外の酸素濃度差に対応する信号を検出する固体電
解質酸素計において、 一端が前記プローブの先端近傍に位置し、他端
が該プローブの非先端側に突出して該プローブ内
に設置される管路と、試験管形固体電解質及び該
固体電解質に一体化されるフランジから成り、該
固体電解質の閉塞端を前記プローブの先端から挿
入して該プローブに設置されるセルユニツトと、
一端が前記固体電解質の中空部に挿入され、他端
が前記プローブの先端近傍に位置する管路に結合
される略Ｕ字形管路と、該管路を支持すると共に
前記セルユニツトのフランジに接合し、締付用具
によつて該セルユニツトを前記プローブの先端に
固定するフランジとを具備することを特徴とする
固体電解質酸素計。[Scope of Claims] 1. A solid electrolyte oxygen meter that has a partition made of a solid electrolyte at or near the tip of the probe and detects a signal corresponding to the difference in oxygen concentration between the inside and outside of the probe. , a conduit installed in the probe with one end located near the tip of the probe and the other end protruding toward the non-tip side of the probe, a test tube-shaped solid electrolyte, and a flange integrated with the solid electrolyte. a cell unit that is installed in the probe by inserting the closed end of the solid electrolyte from the tip of the probe;
A substantially U-shaped conduit whose one end is inserted into the hollow part of the solid electrolyte and whose other end is connected to a conduit located near the tip of the probe; A solid electrolyte oxygen meter comprising: a flange for fixing the cell unit to the tip of the probe with a tightening tool.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56089908A JPS57204448A (en) | 1981-06-11 | 1981-06-11 | Solid electrolyte oxygen meter |
| CA000397396A CA1180384A (en) | 1981-03-06 | 1982-03-02 | Oxygen gas analyzer using solid electrolyte |
| GB8206502A GB2096772B (en) | 1981-03-06 | 1982-03-05 | Oxygen gas analyzer using solid electrolyte |
| GB08223968A GB2112526B (en) | 1981-03-06 | 1982-08-20 | Oxygen gas analyzer using solid electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56089908A JPS57204448A (en) | 1981-06-11 | 1981-06-11 | Solid electrolyte oxygen meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57204448A JPS57204448A (en) | 1982-12-15 |
| JPS6367853B2 true JPS6367853B2 (en) | 1988-12-27 |
Family
ID=13983811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56089908A Granted JPS57204448A (en) | 1981-03-06 | 1981-06-11 | Solid electrolyte oxygen meter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57204448A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6358152A (en) * | 1986-08-28 | 1988-03-12 | Ngk Insulators Ltd | Industrial oxygen concentration measuring apparatus |
| JPS6350059U (en) * | 1986-09-18 | 1988-04-05 | ||
| JPH0640091B2 (en) * | 1986-09-30 | 1994-05-25 | 日本碍子株式会社 | Industrial gas concentration measuring device |
| JPH0799364B2 (en) * | 1988-03-31 | 1995-10-25 | 東京電力株式会社 | Oxygen analyzer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5585247A (en) * | 1978-10-13 | 1980-06-27 | Milton Roy Co | Probe for oxygen estimation meter |
-
1981
- 1981-06-11 JP JP56089908A patent/JPS57204448A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5585247A (en) * | 1978-10-13 | 1980-06-27 | Milton Roy Co | Probe for oxygen estimation meter |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57204448A (en) | 1982-12-15 |
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