JPH0438263Y2 - - Google Patents
Info
- Publication number
- JPH0438263Y2 JPH0438263Y2 JP16096787U JP16096787U JPH0438263Y2 JP H0438263 Y2 JPH0438263 Y2 JP H0438263Y2 JP 16096787 U JP16096787 U JP 16096787U JP 16096787 U JP16096787 U JP 16096787U JP H0438263 Y2 JPH0438263 Y2 JP H0438263Y2
- Authority
- JP
- Japan
- Prior art keywords
- electrode body
- molten metal
- rod
- protective tube
- level detection
- 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
- 239000002184 metal Substances 0.000 claims description 17
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 9
- 239000000919 ceramic Substances 0.000 claims description 8
- 239000004020 conductor Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910003564 SiAlON Inorganic materials 0.000 description 1
- 239000000112 cooling gas Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、金属溶湯中に電極体を浸漬し、溶湯
との導通の有無により検知する形式の湯面検知棒
に関するものである。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a metal level detection rod that detects the presence or absence of conduction with the molten metal by immersing an electrode body in the molten metal.
従来、知られている電極体を直接、湯面に浸漬
する形式の湯面検知棒としては、例えば第２図に
示す特開昭60−188818号公報に見られるような
SiCの棒状材料を用いた外層保護管なしの単体構
造のものや、第３図に示す特開昭58−37478号公
報に見られるような電極体をサーモアロイ材で作
り、その外周面のみに保護管として窒化ボロン等
を用いた２重電極構造のものがある。
Conventionally known hot water level detection rods in which the electrode body is directly immersed in the hot water surface include, for example, the one shown in JP-A-60-188818 shown in Figure 2.
The electrode body is made of a thermoalloy material and protected only on its outer circumferential surface, such as a single-piece structure without an outer protection tube using a rod-shaped SiC material, or the electrode body as shown in JP-A No. 58-37478 shown in Fig. 3. There is a tube with a double electrode structure using boron nitride or the like.
しかしながら、上記のような例において、前者
のSiC単体構造の湯面検知棒は、比較的低融点の
ものの湯面検知に用いれば問題はないが、高融点
のものに対しては、電極体自身が溶損を起こし、
導通性の劣化をまねいて測定寿命が短かいという
欠点がある。また、後者のサーモアロイを用いた
２重電極構造のものは、電極体の溶損を防止する
為に、耐熱絶縁体の外側にある空隙にAr等の冷
却ガスを供給する装置を伴う構造及び製作上の加
工処理が複雑という問題がある。
However, in the above example, the former SiC single-structured hot water level detection rod poses no problem if used to detect the level of hot water with a relatively low melting point, but when used for hot water with a high melting point, the electrode body itself causes melting loss,
The drawback is that it causes deterioration of conductivity and has a short measurement life. In addition, the latter double electrode structure using thermoalloy has a structure and manufacturing method that requires a device to supply a cooling gas such as Ar to the void outside the heat-resistant insulator in order to prevent melting of the electrode body. There is a problem that the above processing is complicated.
そこで、本考案の目的は、電極体の測定寿命を
向上し、製作が容易で附帯装置を伴なわない汎用
性のあるFe等の高融点金属用の湯面検知棒を提
供することである。 Therefore, the purpose of the present invention is to provide a hot water level detection rod for high-melting point metals such as Fe, which improves the measurement life of the electrode body, is easy to manufacture, and does not require ancillary equipment and is versatile.
本考案による湯面検知棒は、前記実用新案登録
請求の範囲に記載したように、電極体及びその外
周を取り巻く保護管として中空の耐熱性の高いセ
ラミツク体等にて構成するものである。電極体を
導電性セラミツクとすることにより、高融点の金
属溶湯と接触しても電極体自身の溶損変質はなく
なり、また溶湯との接触抵抗も小さくなる。中空
の保護管を絶縁性セラミツクとすることにより、
検知棒先端の電極体以外での導通及び短絡を排除
し、測定精度を向上する。
The hot water level detection rod according to the present invention, as described in the claims of the above-mentioned utility model registration, is constructed of a hollow highly heat-resistant ceramic body or the like as an electrode body and a protective tube surrounding the outer periphery of the electrode body. By making the electrode body of conductive ceramic, the electrode body itself will not suffer from erosion and deterioration even if it comes into contact with a molten metal having a high melting point, and the contact resistance with the molten metal will also be reduced. By using insulating ceramic for the hollow protection tube,
Eliminates conduction and short circuits other than the electrode body at the tip of the detection rod, improving measurement accuracy.
また、棒状導通体は中空の保護管との熱膨張差
にもとづく緩みを吸収するために、例えばスプリ
ング等の伸縮体を介して固定する。さらに、電極
体と保護管の先端の開口部とをテーパー接合する
ため、内側の電極体の熱膨張による外側の保護管
の割れを防ぎ、同時に中空隙への溶湯の浸入を防
ぐことができる。なお、セラミツク体としてはな
るべく溶湯とのぬれ性が悪く、また反応しにくい
材質を適用すれば好ましいことは勿論のことであ
る。 Further, the rod-shaped conductor is fixed via an elastic body such as a spring to absorb loosening due to a difference in thermal expansion with the hollow protective tube. Furthermore, since the electrode body and the opening at the tip of the protective tube are tapered together, it is possible to prevent the outer protective tube from cracking due to thermal expansion of the inner electrode body, and at the same time prevent molten metal from entering the hollow gap. It goes without saying that it is preferable to use a material that has poor wettability with the molten metal and is difficult to react with the ceramic body.
本考案の実施例を以下図面を参照しながら説明
する。第１図は、湯面検知棒の長尺方向の断面を
示したものである。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a longitudinal cross-section of the hot water level detection rod.
半球状の導電性サイアロンからなる電極体１
に、長尺のSUS304にてなる導通体３をねじ止め
によつて接続する。この電極の外周全体をサイア
ロンからなる中空円筒状の保護管２で取り巻く。
湯面検知棒先端の電極体１と保護管２との接触部
は、テーパ形状によつて接合させ、また保護管２
の他端では、導通体３が伸縮するように、とじふ
た４とバネ５を設けて固定する。電極体１及び保
護管２共に、同系材質のセラミツクで、熱膨張係
数がほぼ等しいのでほとんど問題となることはな
いが、導通体３が伸縮する構造とすることによ
り、内側の電極体１の熱膨張による外側の保護管
２の割れを防ぎ、同時に中空隙への溶湯の浸入と
スプラツシユの附着を防ぐことができる。 Electrode body 1 made of hemispherical conductive sialon
A conductor 3 made of long SUS304 is connected to the conductor 3 by screwing. The entire outer periphery of this electrode is surrounded by a hollow cylindrical protection tube 2 made of SiAlON.
The contact part between the electrode body 1 at the tip of the hot water level detection rod and the protective tube 2 is connected by a tapered shape, and the protective tube 2
At the other end, a closing lid 4 and a spring 5 are provided and fixed so that the conductor 3 can expand and contract. Both the electrode body 1 and the protection tube 2 are made of ceramic of the same type of material and have almost the same coefficient of thermal expansion, so there is almost no problem. It is possible to prevent cracking of the outer protective tube 2 due to expansion, and at the same time prevent molten metal from entering the hollow gap and adhesion of splash.
溶湯に対して、この湯面検知棒を任意のレベル
に設定して、溶湯部が接地していれば、溶湯と接
触することで導通状態が得られ、そのレベルを検
知できる。 If the molten metal level detection rod is set to an arbitrary level with respect to the molten metal and the molten metal part is grounded, a conductive state is obtained by contacting the molten metal, and the level can be detected.
本考案によれば、従来不充分であつた高融点金
属溶湯での溶損による測定寿命低下は、耐熱性の
高いセラミツクを用いることで防止し、測定寿命
を大幅に向上できた。また、従来の２重電極構造
における複雑な構造と比較して、導通体を伸縮さ
せるという簡易な構造により精度の高い湯面検知
を達成できる。これによりArガス供給装置等の
付帯設備を必要とせず、また小型である為、汎用
性が向上できた。
According to the present invention, the decrease in measured life due to melting loss with high melting point metal molten metal, which was insufficient in the past, can be prevented by using highly heat resistant ceramic, and the measured life can be significantly improved. Furthermore, compared to the complicated structure of the conventional dual electrode structure, highly accurate hot water level detection can be achieved with the simple structure of expanding and contracting the conductor. This eliminates the need for incidental equipment such as an Ar gas supply device, and the small size improves versatility.
第１図は、本考案に係る湯面検知棒の一実施例
を示す断面図、第２図は、従来の電極単体構造の
一例を示す略解図、第３図は、従来の２重電極構
造の略解図である。
１……電極体、２……保護管、３……導通体、
４……とじふた、５……伸縮体、６……接続端
子。
Fig. 1 is a sectional view showing an embodiment of the hot water level detection rod according to the present invention, Fig. 2 is a schematic diagram showing an example of a conventional single electrode structure, and Fig. 3 is a conventional double electrode structure. This is a schematic diagram. 1... Electrode body, 2... Protection tube, 3... Conductor,
4... Binding lid, 5... Expandable body, 6... Connection terminal.
Claims (1)
なる電極体に棒状導通体をとりつけ、前記棒状導
通体が内部を貫通するようにして、耐熱電気絶縁
性セラミツクからなる中空の保護管の先端の開口
部に前記電極体をテーパー接合させ、前記保護管
の他端の開口部において、前記棒状導通体を伸縮
体を介して固定してなることを特徴とする金属溶
湯の湯面検知棒。 A rod-shaped conductor is attached to an electrode body whose tip that comes into contact with the molten metal is made of conductive ceramic, and the rod-shaped conductor penetrates through the inside of the hollow protection tube made of heat-resistant electrically insulating ceramic. A molten metal level detection rod, characterized in that the electrode body is tapered joined to the protective tube, and the rod-shaped conductive body is fixed via an expandable body at the opening at the other end of the protective tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16096787U JPH0438263Y2 (en) | 1987-10-21 | 1987-10-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16096787U JPH0438263Y2 (en) | 1987-10-21 | 1987-10-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0166030U JPH0166030U (en) | 1989-04-27 |
| JPH0438263Y2 true JPH0438263Y2 (en) | 1992-09-08 |
Family
ID=31443499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16096787U Expired JPH0438263Y2 (en) | 1987-10-21 | 1987-10-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0438263Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007309775A (en) * | 2006-05-18 | 2007-11-29 | Omega:Kk | Waterproof electrode |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002054976A (en) * | 2000-08-10 | 2002-02-20 | Fulta Electric Machinery Co Ltd | Sensor |
| JP4986567B2 (en) * | 2006-10-10 | 2012-07-25 | 三井金属鉱業株式会社 | Ceramic sensor |
-
1987
- 1987-10-21 JP JP16096787U patent/JPH0438263Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007309775A (en) * | 2006-05-18 | 2007-11-29 | Omega:Kk | Waterproof electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0166030U (en) | 1989-04-27 |
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