JPH0217332Y2 - - Google Patents
Info
- Publication number
- JPH0217332Y2 JPH0217332Y2 JP5247782U JP5247782U JPH0217332Y2 JP H0217332 Y2 JPH0217332 Y2 JP H0217332Y2 JP 5247782 U JP5247782 U JP 5247782U JP 5247782 U JP5247782 U JP 5247782U JP H0217332 Y2 JPH0217332 Y2 JP H0217332Y2
- Authority
- JP
- Japan
- Prior art keywords
- cap
- molten steel
- openings
- opening
- tip
- 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
- 229910000831 Steel Inorganic materials 0.000 claims description 57
- 239000010959 steel Substances 0.000 claims description 57
- 239000000523 sample Substances 0.000 claims description 22
- 238000007654 immersion Methods 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 239000002893 slag Substances 0.000 description 26
- 238000001514 detection method Methods 0.000 description 17
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000000465 moulding Methods 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 230000004043 responsiveness Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Description
本考案は、消耗浸漬型プローブの先端保護キヤ
ツプに関し、更に詳しくは先端部に溶鋼温度測定
用の熱電対、若しくは酸素、炭素、硫黄等の濃度
測定用の検出部を設けてなる消耗浸漬型のプロー
ブを溶融金属上表面の比較的硬いスラグ層を通過
して溶鋼中に浸漬させるに際してスラグ層通過時
に熱電対、検出部等の先端取付部材を破損するこ
となく、容易に溶鋼中に浸漬させ、目的とする測
定を正確に行えるようにすべくプローブ先端部を
被覆保護したものに関する。
従来消耗浸漬型プローブの先端に金属製の有孔
キヤツプを嵌着することは既に公知であり、これ
ら金属製有孔キヤツプは、プローブ搬送中の機械
的シヨツクから先端検出部等を保護し、溶鋼中に
プローブを浸漬する際の熱的・機械的シヨツクか
ら先端検出部等を保護し、かつプローブ先端の検
出部等が溶鋼中の測定点等に達したとき、容易か
つ迅速に溶融して先端検出部等を溶鋼中に露出さ
せる必要があることから、溶鋼の温度にて適宜溶
融する材質（鉄・銅またはアルミニウム）にてキ
ヤツプ本体を肉厚0.25〜0.3mmとなし、頂部又は
側壁に直径２〜３mmの小孔を１ケまたは複数個形
成したキヤツプが一般に使用されてきた。しかし
これら従来公知の金属製キヤツプは、溶鋼表面の
スラグ層が硬く、且厚いときには、キヤツプのつ
ぶれが発生して先端検出部等を損傷して使用でき
ない欠陥があり、これを除去、解決する手段とし
て別体のスラグ・ブレーカーによつて機械的にス
ラグを破砕してからプローブを浸漬する方法、ま
たは第４図に示す実公昭52−52625号のごとく、
スラグ層貫通時の熱的・機械的シヨツクに充分に
耐えるだけの肉厚をもつた有孔先細キヤツプ10
を、比較的肉薄な保持筒１１を用いてプローブ先
端に固定し、もつてスラグ貫通後に保持筒１１が
溶融して有孔先細キヤツプ１０そのものを脱落さ
せるよう構成されたものが使用されてきた。
しかし別体スラグ・ブレーカーを併用する方法
はプローブ浸漬を煩雑化しかつプローブ浸漬単価
が高くなる欠点を有し、また第４図に示す先行技
術の構成は、キヤツプと保持筒という２重構造の
ため部品単価が高くなり、キヤツプ取付けが複雑
となるばかりでなく、スラグ貫通中に保持筒１１
が溶融してキヤツプ１０がずれ先端検出部等を破
損させるか、または保持筒１１が容易に溶融せ
ず、先端検出部の性能を阻害する等の欠陥があつ
た。
本考案は、上記した従来公知の先端保護キヤツ
プまたは浸漬方法の欠陥を除去、解決したもの
で、その要旨とするところは、スラグ層が硬く厚
い使用条件下で、プローブ先端の検出部等を損傷
することなくスラグ層を貫通して溶鋼内測定点に
到達せしめ、かつスラグ層と溶鋼層との界面に対
して傾斜角度をもつて突入し、溶鋼層内を斜め下
方へ向かつて下降する途上や、溶鋼内測定点に停
止したときに、溶鋼をキヤツプ内に迅速に導入し
て検出部への溶鋼熱の伝播を迅速化することで検
出部の応答性を高め、かつキヤツプの脱落を溶鋼
浸漬後早期に行なわせて検出部を露出せしめ、し
かも単体構造で部品コスト及び取付け作業単価と
もに安価であり、加えてキヤツプの形成方法とし
ても溶鋼導入用の開口を予め開設した金属板をプ
レス成型する従来の加工法をそのまま踏襲できる
保護キヤツプを提供せんとするものである。
更に詳述すると、本考案の保護キヤツプは、硬
く厚いスラグ層の貫通が容易なようにその先端に
円錐状の先細部を形成し、かつ該キヤツプを形成
する金属の材質及び肉厚を、スラグ層通過時の熱
的・機械的衝撃に充分耐えうるもの、即ち肉厚に
関してはやや厚めのものに設定する。そしてキヤ
ツプに開設する複数個の開口は略長方形状となし
て各開口間にスラグ通過時の衝撃に対しても変形
しない程度の機械的強度を有する側壁を残した構
成となし、更にこの開口の大きさは、比較的粘性
が高いスラグは侵入できず、他方、比較的粘性の
低い溶鋼はキヤツプ内に迅速に導入し得る大きさ
に設定している。そして、略長方形状の開口はそ
の先端側がキヤツプの先細部にかかるように形成
することで、先細部のテーパー面にも開口部が存
在するようにしている。溶鋼層内を斜め下方へ向
かつて降下する途上及び溶鋼層内測定点で停止し
たときには先細部に存在する開口に大きな流入圧
が作用する為、溶鋼のキヤツプ内への導入は迅速
となり、このことによつて、キヤツプが厚肉であ
つてもキヤツプの脱落は迅速に行なうことが可能
となり、又、キヤツプ内溶鋼熱が厚肉キヤツプに
吸熱されることがあつても、溶鋼の流入が迅速に
行える為、吸熱による影響はほとんど無視するこ
とが可能で、熱電対等の検出部の応答性は低下し
ない。そして、キヤツプの作成は、開口を設けた
金属板をプレス成型するという従来の一般的作成
方法を用いることとができる結果、プレス成型後
のキヤツプにおける各開口間側壁幅は先細部にお
ける開口間側壁幅が円筒部におけるそれよりも幅
狭に形成され、このことによつて、キヤツプ先端
部である先細部の溶融脱落を一層容易化してい
る。
以下本考案を図面にもとづいて説明すると、第
１図、第２図は夫々本考案の異なつた実施態様を
示す斜視図であつて、１はキヤツプ本体Ａ先端の
円錐状先細部、２はキヤツプ円筒部、３は開口を
示し、さらに開口３においてａは開口の幅寸法、
ｂは開口の長さ寸法を示し、円筒部２における長
さb1と先細部１における長さb2の合計長さであ
る。ｃは開口３…によつて形成された開口間のキ
ヤツプ側壁のうちの先細部１における開口間側壁
寸法を示し、c′は円筒部の開口間側壁寸法を示す
ものであり、これ等の構成要素はその必要条件と
して；
１ 第１図、第２図の矢印方向に鋼浴表面から溶
鋼中へ進行（浸漬）する消耗浸漬型プローブの
先端キヤツプにおいて、スラグ貫通中はスラグ
が侵入せず、スラグ下の溶鋼中では溶鋼が容易
に侵入する寸法とされた複数個の開口をキヤツ
プ側壁に設ける点。
２ 前記複数個の開口によつて形成される開口間
の側壁が、スラグ貫通中の熱的・機械的シヨツ
クに充分に耐えるだけの強度を有するととも
に、溶鋼中の測定点で停止したとき、キヤツプ
内外の溶鋼（キヤツプ内溶鋼は前記開口から流
入したもの）による加熱でもつて容易かつ迅速
に溶融して、キヤツプ先端部を脱落、開口する
ような寸法となす点。
３ スラグ層通過時の衝撃に耐え得る肉厚とした
ことでキヤツプに溶鋼熱が奪われ、この結果検
知部の応答性の低下が懸念されるが、この低下
を補うことができるようにキヤツプへの溶鋼の
導入を迅速になすこと。
４ キヤツプの作成方法として、開口開設後の金
属板をプレス成型する従来方法がそのまま踏襲
できるものであること。
を充足するものとし、更に具体的に説明する
と、前記要件を満たす材質および厚さをもつ金属
製キヤツプにおいて、10mm≦ａ≦15mm，10mm≦ｂ
なるａ，ｂ寸法を有する複数個の開口をキヤツプ
側壁に設けるとともに、溶鋼層内を斜め下方向に
向かつて降下するプローブ先端のキヤツプ内への
溶鋼の導入をより迅速化する為に、前記開口はキ
ヤツプ円筒部２から先細部１にかけて通常５〜10
mm入り込ませた構成となして、先細部１に溶鋼の
流入圧が効果的に作用する開口を存在させてい
る。そして溶鋼層突入後は先細部１の溶融脱落を
容易化する為に、先細部１に存在する開口間側壁
寸法ｃが開口全長における最小幅部となるよう開
口間側壁寸法ｃを円筒部２における開口間側壁寸
法c′よりも小さく設定し、かつ該最小幅部分をス
ラグ貫通中の熱的・機械的シヨツクに耐えるだけ
の強度をもつとともにキヤツプ内外の溶鋼による
加熱で容易に溶融するような寸法になすものとす
る。
そして、先細部１の開口間側壁寸法ｃを円筒部
２の開口間側壁寸法c′より小さく設定するに際
し、キヤツプ加工方法として特別の方法を採用す
る必要はなく従来どおりの作成方法、即ち、開口
を放射状に開設した金属板に対し前記放射状の開
口の中心が成型後のキヤツプの最頂部となるよう
にしてプレス成型する方法が採用され、この従来
方法によりプレス成型するだけで開口間側壁寸法
ｃを開口間側壁寸法c′よりも小さくすることがで
きる。
而して具体例としては円筒部２を直径25mm、高
さ22.5mmとなし先細部１は、その頂角を60゜とな
し、全体を高さ39mmとなすとともに肉厚0.5又は
1.0mmとした鋼製キヤツプ本体Ａの側壁に、開口
長さ寸法ｂを20mmとなして開口幅寸法ａを例えば
８mm，10mm等に設定した開口３…をキヤツプ先細
部１に５mm入りこませて所定数配設して構成し、
開口幅寸法ａ及び開口３の形成数を変更した場合
における実験を行い、その結果を下記の第１表に
示す。
The present invention relates to a tip protection cap for a consumable immersion type probe, and more specifically, the present invention relates to a cap for protecting the tip of a consumable immersion type probe, and more specifically, a consumable immersion type probe having a thermocouple for measuring the temperature of molten steel or a detection part for measuring the concentration of oxygen, carbon, sulfur, etc. at the tip. When the probe passes through a relatively hard slag layer on the upper surface of the molten metal and is immersed in the molten steel, the probe can be easily immersed in the molten steel without damaging tip attachment members such as a thermocouple and a detection part when passing through the slag layer. This relates to a probe in which the tip of the probe is coated and protected so that the intended measurement can be carried out accurately. It is already known that a perforated metal cap is fitted to the tip of a conventional consumable immersion type probe. It protects the tip detection part etc. from thermal and mechanical shock when the probe is immersed in the molten steel, and when the detection part etc. of the probe tip reaches the measuring point etc. Since it is necessary to expose the detection part etc. to the molten steel, the cap body is made of a material (iron, copper, or aluminum) that melts at the temperature of the molten steel, and has a wall thickness of 0.25 to 0.3 mm, and the top or side wall has a diameter Caps having one or more small holes of 2 to 3 mm in size have generally been used. However, these conventionally known metal caps have the defect that when the slag layer on the surface of the molten steel is hard and thick, the cap collapses and damages the tip detection part, making it unusable. A method of mechanically crushing the slag using a separate slag breaker and then immersing the probe, or as shown in Utility Model Publication No. 52-52625 shown in Fig. 4,
Perforated tapered cap with wall thickness sufficient to withstand thermal and mechanical shock when penetrating the slag layer10
is fixed to the tip of the probe using a relatively thin holding cylinder 11, and after the slug penetrates, the holding cylinder 11 melts and the perforated tapered cap 10 itself falls off. However, the method of using a separate slag breaker together has the drawbacks of complicating probe immersion and increasing the cost per probe immersion.Furthermore, the prior art configuration shown in Fig. 4 has a double structure of a cap and a holding cylinder. Not only does the unit cost of parts increase and the cap installation become complicated, but also the holding cylinder 11
There were defects such as melting of the cap 10, causing the cap 10 to shift and damaging the tip detection section, or the holding cylinder 11 not easily melting, impairing the performance of the tip detection section. The present invention eliminates and solves the deficiencies of the conventionally known tip protection caps or immersion methods described above. It penetrates the slag layer to reach the measuring point in the molten steel without causing any damage, enters at an inclined angle to the interface between the slag layer and the molten steel layer, and descends diagonally downward in the molten steel layer. , when stopped at a measuring point in molten steel, molten steel is quickly introduced into the cap to speed up the propagation of molten steel heat to the detection part, increasing the responsiveness of the detection part, and preventing the cap from falling off due to immersion in the molten steel. It is done early in the process to expose the detection part, and since it is a single unit, both the parts cost and the unit cost of installation work are low.In addition, the cap is formed by press-molding a metal plate with an opening for introducing molten steel in advance. The purpose is to provide a protective cap that can be used in conventional processing methods. More specifically, the protective cap of the present invention has a conical taper at its tip so that it can easily penetrate a hard and thick slag layer, and the material and wall thickness of the metal forming the cap are different from those of the slag. The material is designed to be able to sufficiently withstand thermal and mechanical shocks when passing through the layer, that is, to have a slightly thicker wall thickness. The plurality of openings formed in the cap are approximately rectangular in shape, with a side wall between each opening having enough mechanical strength not to be deformed even by the impact of the slag passing through. The size is set so that slag, which has a relatively high viscosity, cannot enter, while molten steel, which has a relatively low viscosity, can be quickly introduced into the cap. The substantially rectangular opening is formed so that its tip side extends over the tapered part of the cap, so that an opening also exists on the tapered surface of the tapered part. As the molten steel moves diagonally downward in the molten steel layer and stops at the measurement point within the molten steel layer, a large inflow pressure acts on the opening in the tapered part, so the molten steel can be quickly introduced into the cap. This allows the cap to fall off quickly even if the cap is thick-walled, and even if the heat of the molten steel inside the cap is absorbed by the thick-walled cap, the molten steel can quickly flow in. Therefore, the effect of heat absorption can be almost ignored, and the responsiveness of the detection unit such as a thermocouple does not deteriorate. As a result, the width of the side wall between each opening in the cap after press molding is the same as that of the side wall between the openings at the tapered part. The width is narrower than that of the cylindrical portion, thereby making it easier for the tapered portion, which is the tip of the cap, to melt and fall off. The present invention will be explained below based on the drawings. Figs. 1 and 2 are perspective views showing different embodiments of the present invention, in which 1 is a conical taper at the tip of the cap main body A, and 2 is a cap. In the cylindrical part, 3 indicates an opening, and in the opening 3, a indicates the width of the opening;
b indicates the length of the opening, and is the total length of the length b 1 in the cylindrical portion 2 and the length b 2 in the tapered portion 1. c indicates the dimension of the side wall between the openings in the tapered part 1 of the side wall of the cap between the openings formed by the openings 3, and c' indicates the dimension of the side wall between the openings of the cylindrical part. The elements are necessary conditions: 1. In the tip cap of the consumable immersion type probe that advances (immerses) from the steel bath surface into the molten steel in the direction of the arrows in Figs. 1 and 2, slag does not enter during the slag penetration; The cap side wall is provided with multiple openings sized to allow molten steel to easily penetrate into the molten steel below the slag. 2. The side wall between the openings formed by the plurality of openings has sufficient strength to withstand thermal and mechanical shock during penetration of the slag, and when the cap stops at the measurement point in molten steel. The dimensions are such that the molten steel inside and outside (the molten steel inside the cap flows through the opening) melts easily and quickly, allowing the tip of the cap to fall off and open. 3 By making the cap thick enough to withstand the impact when it passes through the slag layer, the heat of the molten steel is taken away by the cap, and as a result, there is a concern that the responsiveness of the detection section will decrease. To quickly introduce molten steel. 4. The cap can be made using the conventional method of press-molding a metal plate after opening an opening. To be more specific, in a metal cap having a material and thickness that satisfies the above requirements, 10mm≦a≦15mm, 10mm≦b
A plurality of openings having dimensions a and b of is usually 5 to 10 from the cap cylindrical part 2 to the tapered part 1.
mm, so that the tapered portion 1 has an opening on which the inflow pressure of molten steel acts effectively. After entering the molten steel layer, in order to facilitate the melting and falling off of the tapered part 1, the side wall dimension c between the openings in the cylindrical part 2 is adjusted so that the side wall dimension c between the openings existing in the tapered part 1 becomes the minimum width part in the entire length of the opening. The dimension of the side wall between the openings is set to be smaller than c', and the minimum width part is strong enough to withstand the thermal and mechanical shock during penetration of the slag, and is also dimensioned so that it is easily melted by heating by molten steel inside and outside the cap. shall be done. When setting the inter-opening side wall dimension c of the tapered part 1 to be smaller than the inter-opening side wall dimension c' of the cylindrical part 2, there is no need to adopt a special method as a cap processing method, and the conventional manufacturing method, that is, the opening A method is adopted in which a metal plate with radial openings is press-molded so that the center of the radial openings becomes the top of the cap after molding, and by simply press-molding using this conventional method, the side wall dimension between the openings c can be made smaller than the inter-opening side wall dimension c'. As a specific example, the cylindrical part 2 has a diameter of 25 mm and a height of 22.5 mm, and the tapered part 1 has an apex angle of 60 degrees, a total height of 39 mm, and a wall thickness of 0.5 mm or 22.5 mm.
In the side wall of the steel cap body A, which has a diameter of 1.0 mm, an opening 3 with an opening length b of 20 mm and an opening width a of 8 mm, 10 mm, etc. is inserted 5 mm into the tapered part 1 of the cap. Arrange and configure a predetermined number of
Experiments were conducted in which the opening width dimension a and the number of openings 3 formed were changed, and the results are shown in Table 1 below.
【表】
表１のテスト結果によれば、開口幅寸法ａが、
10mm≦ａ≦15mmのとき、スラグ貫通中にスラグが
侵入せずかつ溶鋼中で溶鋼が容易に流入すること
を示すとともにキヤツプ先細部１における開口間
側壁ｃを肉厚0.5mmの場合5.7mm〜10.9mm、肉厚1.0
mmの場合5.7mm〜8.4mmの範囲内に設定したとき満
足すべき結果を示し、ｃ寸法が上記範囲にないと
きは、熱的・機械的強度不足のためスラグ貫通中
にキヤツプのつぶれが発生するか、または、キヤ
ツプ内外からの溶鋼加熱によつても開口間側壁寸
法ｃ部分が溶融せず、従つてキヤツプ先端部が脱
落、開口しないことを示した。
次に後掲した第２表は、前記第１表のテストに
おいて所期の効果が得られた開口幅寸法ａの範囲
内において更に肉厚を0.5mm又は1.0mmとした場合
のキヤツプ先細部の開口間側壁寸法ｃを限定すべ
く行つたテストである。[Table] According to the test results in Table 1, the opening width dimension a is
When 10mm≦a≦15mm, the slag does not enter during the slag penetration and the molten steel easily flows into the molten steel, and the side wall c between the openings in the tapered part 1 of the cap is 5.7mm to 5.7mm when the wall thickness is 0.5mm. 10.9mm, wall thickness 1.0
In the case of mm, satisfactory results are obtained when the value is set within the range of 5.7 mm to 8.4 mm, and when the c dimension is not within the above range, the cap collapses during slug penetration due to insufficient thermal and mechanical strength. Or, even when the molten steel is heated from the inside and outside of the cap, the side wall dimension c between the openings does not melt, and therefore the tip of the cap does not fall off or open. Next, Table 2 below shows the cap tip part when the wall thickness is further increased to 0.5 mm or 1.0 mm within the range of opening width dimension a that achieved the desired effect in the test in Table 1 above. This test was conducted to limit the side wall dimension c between the openings.
【表】
表２に示すテスト結果によれば所期効果が得ら
れる先細部１における開口間側壁ｃの幅寸法は、
肉厚0.5mmの鋼製キヤツプの場合６mm≦ｃ≦12mm、
肉厚1.0mmの鋼製キヤツプの場合４mm≦ｃ≦９mm
であることが確認された。また上記の第１、第２
表のテストにおいてスラグが流入せずかつ溶鋼が
容易に流入し得る開口３は、開口寸法ａ，ｂに関
連し、開口数には殆んど関連しないことが同時に
確認された。またその後のテストにおいて開口長
さ寸法ｂは、開口幅寸法ａの最小寸法10mmを越え
ておれば問題なく、特に限定する必要のないこと
を示した。
そして、上記各寸法であれば、溶鋼層内を斜め
下方向に向けて降下するプローブ先端のキヤツプ
内に、先細部に形成した開口を通じて溶鋼を迅速
に導入させることができ、厚肉であるキヤツプも
迅速に溶融脱落させることができるとともに、厚
肉であるキヤツプによる吸熱作用に起因して発生
が懸念される検知部の応答性低下も回避すること
ができる。なお、従来どおりのプレス成型方法に
よりキヤツプを作成するだけで、先細部の開口間
側壁寸法ｃは必然的に円筒部の開口間側壁寸法
c′より小さくなるので、開口間側壁寸法ｃを最小
幅と成すための加工上の特別の配慮もいらない。
以上、テスト結果を総合して、本考案を構成す
る開口寸法ａ，ｂおよびキヤツプ先細部１の開口
間側壁寸法ｃはキヤツプ肉厚0.5〜1.0mmとした鋼
製キヤツプの場合、以下数値にもとづいて決定さ
れるものである。
10mm≦ａ≦15mm，10mm≦ｂ，
６mm≦ｃ≦12mm（肉厚0.5mm）、４mm≦ｃ≦９mm
（肉厚1.0mm）
従つて肉厚0.5mmで、円筒部２を直径2r、高さ
ｈとし先細部１を頂角60゜（但し頂端から５mmを除
く）となした鋼製キヤツプにおけるａ，ｂ，ｃの
各寸法および開口数ｎは開口上端面を円筒部から
先細部に５mm達せしめた場合：
ｎ＝π（2r−５）／16〜27
注 分母の16〜27は肉厚0.5mmとした場合の開口
幅寸法ａと先細部の開口間側壁寸法ｃの加算
値の最大値と最小値の範囲を示し、肉厚1.0
mmとなした場合は、14〜24となる。
を満足する整数ｎを決定してかつ、ｎを確定した
ときのａ＋ｃ寸法を算出し、ついで前記ａ＋ｃ値
を満足させるａ，ｃを定めればよいわけで、例え
ば円筒部を直径27mm、高さ25mmとなし、全高43
mm、頂角60゜とした肉厚1.0mmの鋼製キヤツプにお
ける本考案の開口寸法等は：
上述の式によれば
ｎ＝π（27−５）／14〜24＝69／14〜24 ―
となり、
式においてｎがとりうる整数値は３または４
であり、このときの分母の数値は23または17.25
である。
69／23＝３ ―′
69／17.25＝４ ―″
上記分母の数値23および17.25はａ＋ｃ寸法を
あらわすことから、
ａ＋ｃ＝23 ―″
ａ＋ｃ＝17.25 ―″
となり、従つてａ及びｃは以下の範囲となる。
10≦ａ≦15，４≦ｃ≦９
例えばａを整数に限定したとき、第３表による
組合わせの開口数ｎ、開口寸法ａ，ｃをとること
ができる。[Table] According to the test results shown in Table 2, the width dimension of the side wall c between the openings in the tapered part 1 where the desired effect can be obtained is:
For a steel cap with a wall thickness of 0.5mm, 6mm≦c≦12mm,
For a steel cap with a wall thickness of 1.0mm, 4mm≦c≦9mm
It was confirmed that Also, the first and second
In the tests shown in the table, it was simultaneously confirmed that the openings 3 into which slag does not flow and into which molten steel can easily flow are related to the opening dimensions a and b, and are hardly related to the opening number. Further, in subsequent tests, it was shown that there is no problem as long as the opening length dimension b exceeds the minimum dimension of the opening width dimension a of 10 mm, and there is no need to limit it in particular. With each of the above dimensions, molten steel can be quickly introduced into the cap of the probe tip that descends diagonally downward in the molten steel layer through the opening formed in the tapered part, and the thick-walled cap can be In addition, it is possible to quickly melt and fall off the cap, and it is also possible to avoid a decrease in the responsiveness of the detection section, which may occur due to the heat absorption effect of the thick cap. Note that by simply creating a cap using the conventional press molding method, the side wall dimension c between the openings in the tapered part will inevitably be the same as the side wall dimension between the openings in the cylindrical part.
Since it is smaller than c', there is no need for special consideration in processing to make the inter-opening side wall dimension c the minimum width. Combining the above test results, the opening dimensions a and b and the side wall dimension c between the openings of the cap tapered part 1 that constitute the present invention are based on the following numerical values in the case of a steel cap with a cap wall thickness of 0.5 to 1.0 mm. It is determined by 10mm≦a≦15mm, 10mm≦b, 6mm≦c≦12mm (wall thickness 0.5mm), 4mm≦c≦9mm
(Wall thickness 1.0 mm) Therefore, in a steel cap with a wall thickness of 0.5 mm, the cylindrical part 2 has a diameter of 2r, a height of h, and the tapered part 1 has an apex angle of 60° (excluding 5 mm from the top end). The dimensions of b and c and the numerical aperture n are when the upper end of the opening reaches 5 mm from the cylindrical part to the tapered part: n = π (2r - 5) / 16 to 27 Note: Denominators 16 to 27 are wall thickness 0.5 mm The range of the maximum and minimum values of the sum of the opening width dimension a and the inter-opening side wall dimension c of the tapered part is shown, and the wall thickness is 1.0.
If it is set to mm, it will be 14 to 24. All you need to do is to determine the integer n that satisfies the following, calculate the a+c dimensions when n is determined, and then determine a and c that satisfy the a+c value.For example, if the cylindrical part is 27 mm in diameter and the height is 25mm and total height 43
The opening dimensions of the present invention in a steel cap with a wall thickness of 1.0 mm and an apex angle of 60 degrees are: According to the above formula, n = π (27-5) / 14 ~ 24 = 69 / 14 ~ 24 - In the formula, n can take an integer value of 3 or 4.
In this case, the denominator value is 23 or 17.25
It is. 69/23=3 ―′ 69/17.25=4 ―″ Since the above denominator numbers 23 and 17.25 represent a+c dimensions, a+c=23 ―″ a+c=17.25 ―″ Therefore, a and c are in the following ranges. 10≦a≦15, 4≦c≦9 For example, when a is limited to an integer, the combination of numerical aperture n and aperture dimensions a and c according to Table 3 can be taken.
【表】
またキヤツプ円筒部の高さは25mmであることか
ら
10mm≦ｂ≦20mmであればよい。
以上のように本考案の保護キヤツプは、円錐状
の先細部を形成したキヤツプの側壁に複数個の略
長方形状の開口を円筒部から先細部にかけて形成
し、かつキヤツプの肉厚をスラグ層貫通時に熱
的・機械的衝撃時にも耐え得るような厚さに設定
したから、スラグ貫通時にはキヤツプがキヤツプ
内部の検知部を保護し、かつスラグは粘性が比較
的高いので開口を通じてキヤツプ内に流入される
ことはなく、他方、プローブ先端を溶鋼層内を降
下若しくは溶鋼層内の測定点で停止したときに
は、粘性の低い溶鋼が迅速に導入され、しかも、
開口は先細部にかけて形成されているから溶鋼層
内を斜め下方向に向かつてプローブが降下すると
きには、先細部に存在する開口には大きな流入圧
が作用して、キヤツプ内への溶鋼の迅速な導入が
なされる。又、そして、溶鋼の導入が迅速かつ早
期に行われることから、厚肉キヤツプによる吸熱
作用を無視し得る程度の溶鋼熱を検知部に対して
供給することができ、スラグ通過時の衝撃に耐え
うる程度の肉厚を確保しながらも検知部の応答性
も劣化させることのない保護キヤツプが提供され
るのである。しかも、先細部の開口間側壁寸法ｃ
を円筒部の開口間側壁寸法c′に比べて幅狭として
いるから、キヤツプ内に溶鋼が導入されたときに
先細部は迅速に溶融脱落して先端側を大きく開口
させて検知部周囲への溶鋼熱を伝播をより速やか
に行うことができる。そして、開口間側壁寸法ｃ
を開口間側壁寸法c′よりも小さく設定する為に加
工上特別の配慮は払う必要はなく、単に従来と同
様、開口が開設された金属板をプレス成型するだ
けで上記条件の開口が必然的に形成されるのであ
る。
なお、本考案の保護キヤツプは材質として鋼以
外のものを用いることも可能であり、又その肉厚
も本考案実施例において開示した0.5mm〜1.0mmに
限定されるものではない。[Table] Also, since the height of the cap cylindrical part is 25 mm, it is sufficient if 10 mm≦b≦20 mm. As described above, the protective cap of the present invention has a plurality of approximately rectangular openings formed in the side wall of the cap, which has a conical tapered part, extending from the cylindrical part to the tapered part, and extends through the thickness of the cap to penetrate the slag layer. The cap is designed to have a thickness that can withstand thermal and mechanical shocks, so when the slag penetrates, the cap protects the sensing part inside the cap, and since the slag has a relatively high viscosity, it does not flow into the cap through the opening. On the other hand, when the tip of the probe descends into the molten steel layer or stops at a measurement point within the molten steel layer, molten steel with low viscosity is quickly introduced.
The opening is formed in the tapered part, so when the probe descends diagonally downward in the molten steel layer, a large inflow pressure acts on the opening in the tapered part, causing the molten steel to quickly flow into the cap. An introduction is made. Furthermore, since the introduction of molten steel is carried out quickly and early, it is possible to supply molten steel heat to the detection part to the extent that the heat absorption effect by the thick cap can be ignored, and it can withstand the impact when the slag passes through. This provides a protective cap that does not deteriorate the responsiveness of the detection section while ensuring a sufficient wall thickness. Moreover, the side wall dimension between the openings of the tapered part c
Since the width is narrower than the side wall dimension c' between the openings of the cylindrical part, when molten steel is introduced into the cap, the tapered part quickly melts and falls off, leaving the tip side wide open and spreading around the detection part. Molten steel heat can be propagated more quickly. And the side wall dimension between the openings c
There is no need to take any special consideration in processing in order to set C' to be smaller than the side wall dimension between the openings, and the openings with the above conditions are inevitably created by simply press-forming the metal plate with the openings in the same manner as before. It is formed in The protective cap of the present invention may be made of a material other than steel, and its thickness is not limited to 0.5 mm to 1.0 mm as disclosed in the embodiments of the present invention.
第１図、第２図は夫々本考案の実施様態を示す
斜視図、第３図は第１図に示す実施例のキヤツプ
縦断面図、第４図は従来公知の２重構成のキヤツ
プを消耗浸漬型プローブの先端に嵌着した状態を
示す縦断面図である。
１：キヤツプ先端先細部、２：円筒部、３：開
口、ａ：開口幅寸法、ｂ：開口長さ寸法、ｃ：先
細部における開口間キヤツプ側壁寸法、c′：円筒
部の開口間キヤツプ側壁寸法。
Figures 1 and 2 are perspective views showing embodiments of the present invention, Figure 3 is a vertical cross-sectional view of the cap of the embodiment shown in Figure 1, and Figure 4 is a conventionally known double-structured cap that is worn out. FIG. 3 is a longitudinal cross-sectional view showing a state where the probe is fitted onto the tip of the immersion probe. 1: Cap tip tapered part, 2: Cylindrical part, 3: Opening, a: Opening width dimension, b: Opening length dimension, c: Cap side wall dimension between openings at tapered part, c': Cap side wall between openings of cylindrical part size.
Claims (1)
行ない、若しくは試料採取を行うようになした消
耗浸漬型プローブの先端に取付けられ、円筒部の
先端に円錐状の先細部を形成してなる保護キヤツ
プの側壁に略長方形状となした複数の開口を円筒
部から先細部にかけて形成し、かつ各開口間の側
壁は、円筒部における開口間側壁よりも先細部に
おける開口間側壁が幅狭に形成され、キヤツプ肉
厚をスラグ通過時の衝撃に耐えうる厚さに設定し
てなる消耗浸漬型プローブの先端保護キヤツプ。 It is attached to the tip of a consumable immersion type probe that is immersed in molten steel to measure temperature and/or oxygen, etc., or to collect samples, and has a conical tapered part formed at the tip of the cylindrical part. A plurality of approximately rectangular openings are formed in the side wall of the protective cap from the cylindrical portion to the tapered portion, and the side walls between the openings are narrower in the tapered portion than the side walls between the openings in the cylindrical portion. A cap to protect the tip of a consumable immersion type probe, which has a wall thickness that can withstand the impact when the slug passes through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5247782U JPS58154461U (en) | 1982-04-10 | 1982-04-10 | Tip protection cap for consumable immersion probes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5247782U JPS58154461U (en) | 1982-04-10 | 1982-04-10 | Tip protection cap for consumable immersion probes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58154461U JPS58154461U (en) | 1983-10-15 |
| JPH0217332Y2 true JPH0217332Y2 (en) | 1990-05-15 |
Family
ID=30063188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5247782U Granted JPS58154461U (en) | 1982-04-10 | 1982-04-10 | Tip protection cap for consumable immersion probes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58154461U (en) |
-
1982
- 1982-04-10 JP JP5247782U patent/JPS58154461U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58154461U (en) | 1983-10-15 |
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