JPH0448Y2 - - Google Patents
Info
- Publication number
- JPH0448Y2 JPH0448Y2 JP1986095368U JP9536886U JPH0448Y2 JP H0448 Y2 JPH0448 Y2 JP H0448Y2 JP 1986095368 U JP1986095368 U JP 1986095368U JP 9536886 U JP9536886 U JP 9536886U JP H0448 Y2 JPH0448 Y2 JP H0448Y2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- refractory
- refractory brick
- castable
- core
- 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
- 239000011449 brick Substances 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 21
- 238000007654 immersion Methods 0.000 claims description 15
- 238000009849 vacuum degassing Methods 0.000 claims description 5
- 230000035882 stress Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Description
【考案の詳細な説明】
(産業上の利用分野)
本考案は、構造的に強固で耐用性に優れた真空
脱ガス装置用浸漬管に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an immersion tube for a vacuum degassing device that is structurally strong and has excellent durability.
(従来の技術)
真空脱ガス装置の下部に付設されている浸漬管
は、外周が溶鋼に浸漬し、内周は溶鋼が流通する
という過酷な使用条件のため耐用寿命は短いもの
である。(Prior Art) The immersion pipe attached to the lower part of a vacuum degassing device has a short service life due to harsh operating conditions in which the outer periphery is immersed in molten steel and the inner periphery is immersed in molten steel.
従来の浸漬管の構造は特開昭57−110630号公報
で示すような煉瓦支持が一般的である。この浸漬
管の構造は、第2図及び第3図のように、上端に
フランジ1を備えた円筒状芯金2の内周面にキヤ
スタブル耐火物層3aを介して、円筒状に積付け
た耐火煉瓦層4を設け、芯金2の外周をキヤスタ
ブル耐火物層3bで構成させ、かつ前記耐火煉瓦
層4を支持するため、芯金2の内面に支持金具5
を突設し、最下段耐火煉瓦4aを支持している。 The structure of a conventional immersion pipe is generally a brick support as shown in Japanese Patent Application Laid-Open No. 110630/1983. As shown in Figs. 2 and 3, the structure of this immersion tube is as follows: As shown in Figs. A refractory layer 4 is provided, the outer periphery of the core metal 2 is made up of a castable refractory layer 3b, and a supporting metal fitting 5 is provided on the inner surface of the core metal 2 in order to support the refractory layer 4.
is provided protrudingly to support the lowest refractory brick 4a.
(考案の解決しようとする問題点)
上記従来の浸漬管は、耐火煉瓦層4を支持する
ために最下段耐火煉瓦4aを支持金具5で支持し
ている。そのために、使用中耐火煉瓦層4の膨張
が芯金2の膨張より大きく、支持金具5と耐火煉
瓦層4と接している部分に拘束応力が集中し亀裂
11が発生しやすい問題があつた。その亀裂11
の状態は第4図a及びbに示す如く最下段耐火煉
瓦4aの支持金具5部分に集中して生起する。亀
裂が発達すると溶鋼が侵入し芯金2を溶失し、又
最下段耐火煉瓦4aの脱落を招き浸漬管全体の破
損となる。(Problems to be Solved by the Invention) In the conventional immersion pipe described above, the lowermost refractory brick 4a is supported by a support fitting 5 in order to support the refractory brick layer 4. Therefore, during use, the expansion of the refractory brick layer 4 is greater than the expansion of the core bar 2, resulting in the problem that restraint stress is concentrated on the portion where the support fitting 5 and the refractory brick layer 4 are in contact, and cracks 11 are likely to occur. The crack 11
As shown in FIGS. 4a and 4b, this condition occurs mainly in the support fitting 5 portion of the lowest refractory brick 4a. When the crack develops, molten steel enters and melts down the core metal 2, causing the lowermost refractory brick 4a to fall off, resulting in damage to the entire immersion pipe.
浸漬管の耐用寿命は一般的に第5図に示す如く
キヤスタブル耐火物層3bの下端部の剥落溶損が
あり、したがつて外周キヤスタブル3bの下端部
を厚く施工するのが良いが、溶鋼に浸漬する場合
の取鍋の内径との関係であまり厚く施工出来な
い。本考案は従来のかかる欠点を解決することを
目的とするものである。 As shown in Fig. 5, the service life of the immersion pipe is generally affected by peeling and melting of the lower end of the castable refractory layer 3b. Therefore, it is better to construct the outer castable refractory layer 3b thicker at the lower end. Due to the inner diameter of the ladle when dipping, it cannot be applied too thickly. The present invention aims to solve these drawbacks of the conventional technology.
(問題点の解決手段)
本考案は上端にフランジを備えた円筒状芯金の
内周面に、キヤスタブル耐火物層を介して円筒状
に積付けた耐火煉瓦層を設けるとともに、前記芯
金の外周面をキヤスタブル耐火物層で構成した浸
漬管において、前記芯金の下端に内周側へ向けて
傾斜部を形成せしめてなる真空脱ガス装置用浸漬
管である。(Means for Solving Problems) The present invention provides a layer of refractory bricks stacked in a cylindrical manner with a castable refractory layer interposed on the inner peripheral surface of a cylindrical cored metal having a flange at the upper end, and This immersion tube for a vacuum degassing device is a immersion tube whose outer peripheral surface is made of a castable refractory layer, in which a sloped portion is formed toward the inner periphery at the lower end of the metal core.
(作用)
本考案者等は耐火煉瓦層における熱応力の集中
を分散させるために種々検討を加えた結果、芯金
の下端を内周側へ向つて全面的に傾斜させて最下
段煉瓦の外周全面を支持せんとするものである。
さらに芯金の傾斜面と最下段耐火煉瓦との間には
キヤスタブル耐火物を介在させて応力緩和をも図
つたものである。(Function) As a result of various studies in order to disperse the concentration of thermal stress in the refractory brick layer, the inventors of the present invention made the lower end of the core metal completely sloped toward the inner periphery, and the outer periphery of the lowermost brick layer was It is intended to be fully supported.
Furthermore, a castable refractory is interposed between the inclined surface of the core metal and the lowest refractory brick to alleviate stress.
このように最下段煉瓦の外周全面による支持及
びキヤスタブル耐火物の介在による相乗作用によ
つて、従来のように拘束応力あるいは熱応力によ
る支持個所の亀裂防止を有効に解消したものであ
る。 In this way, the synergistic effect of the support by the entire outer periphery of the lowermost brick and the interposition of the castable refractories effectively eliminates the conventional problem of preventing cracks in the supported portions due to restraint stress or thermal stress.
以下に本考案を図面に基づいて説明すると第1
図に示すように上端にフランジ1を備えた下端部
を内周側に傾斜させた円筒状芯金2の内周面に15
〜30mm程度のキヤスタブル層3aを介して最下段
耐火煉瓦4aを芯金2に平行に切断した煉瓦4a
を含む積付けた耐火煉瓦層4を設ける。芯金2の
外周は例えば60〜200mm程度の厚みを有するキヤ
スタブル耐火物層3bで覆う。図示していないが
芯金2の外周面にスタツドを多数植設し、キヤス
タブル耐火物層3bを保持しておくのが好まし
い。芯金2の下端に内周側へ向けて傾斜部6を形
成させその角度10〜40°好ましくは15〜30°とな
し、傾斜面の長さは芯金2の長さの1/3が好まし
い。耐火煉瓦層4のうち最下段耐火煉瓦4aの背
面は芯金2と同一形状に加工する必要がある。最
下段煉瓦4aのみを傾斜させるのは耐火煉瓦層4
の支持を効果的に行うだけでなく、加工が必要な
耐火煉瓦層4の形状を少くすることができる。従
つて耐火煉瓦層4の形状寸法の種類が少なくな
り、煉瓦製造上及び耐火煉瓦層4の製造上有利に
なる。耐火煉瓦層4の目地代及び耐火煉瓦層4と
キヤスタブル3b間の目地は耐火煉瓦層4の膨張
を極力吸収する様に取るのが良い。芯金2の厚み
は耐火煉瓦層4の上下方向及び内周方向の膨張を
受ける為に10〜20mm程度の厚みが必要である。 The present invention will be explained below based on the drawings.
As shown in the figure, a cylindrical core bar 2 has a flange 1 at its upper end and a lower end inclined toward the inner periphery.
A brick 4a obtained by cutting the lowest refractory brick 4a parallel to the core metal 2 through a castable layer 3a of about 30 mm.
A stacked refractory brick layer 4 containing The outer periphery of the core metal 2 is covered with a castable refractory layer 3b having a thickness of, for example, about 60 to 200 mm. Although not shown, it is preferable to install a large number of studs on the outer peripheral surface of the core bar 2 to hold the castable refractory layer 3b. An inclined part 6 is formed at the lower end of the core bar 2 toward the inner circumferential side, and its angle is 10 to 40 degrees, preferably 15 to 30 degrees, and the length of the inclined surface is 1/3 of the length of the core bar 2. preferable. The back surface of the lowest refractory brick 4a in the refractory brick layer 4 needs to be processed into the same shape as the core bar 2. It is the refractory brick layer 4 that slopes only the lowest brick 4a.
In addition to effectively supporting the refractory brick layer 4, the shape of the refractory brick layer 4 that requires processing can be reduced. Therefore, the variety of shapes and dimensions of the refractory brick layer 4 is reduced, which is advantageous in manufacturing the bricks and the refractory brick layer 4. The joint allowance of the refractory brick layer 4 and the joint between the refractory brick layer 4 and the castable 3b are preferably designed to absorb expansion of the refractory brick layer 4 as much as possible. The thickness of the core metal 2 is required to be about 10 to 20 mm in order to receive the expansion of the refractory brick layer 4 in the vertical direction and the inner circumferential direction.
前述した傾斜角度が10°より小さくなると使用
末期に最下段耐火煉瓦が脱落しやすくなる。また
40°より大きくなると芯金による拘束力が大きく
なり、亀裂の防止が出来なくなるからである。本
考案は芯金2の下端に内周側へ向つて傾斜部6を
形成させ耐火煉瓦層4を支持し、且つ使用中の応
力をキヤスタブル耐火物3bを介して芯金2で受
けるほか支持面積を大きくして一点応力集中によ
る割れを回避するものである。使用中の浸漬管の
芯金2は耐火物の膨張により下端部がラツパ状に
開く傾向があるが本考案は芯金2をしぼり、且つ
芯金2の厚みを考慮することによりラツパ状に開
くことも防止している。 If the above-mentioned inclination angle is smaller than 10°, the lowermost refractory brick will easily fall off at the end of its use. Also
This is because if the angle is larger than 40°, the restraining force by the core metal becomes large, making it impossible to prevent cracks. The present invention supports the refractory brick layer 4 by forming an inclined part 6 toward the inner circumference at the lower end of the core metal 2, and supports the core metal 2 through the castable refractories 3b to receive stress during use. This is to avoid cracking due to stress concentration at one point. The lower end of the core 2 of a dipping tube during use tends to open in a floppy shape due to the expansion of the refractory, but in the present invention, the core 2 is squeezed and the thickness of the core 2 is taken into consideration to open the bottom end in a floppy shape. It also prevents this.
更に芯金2をしぼることにより外周キヤスタブ
ル耐火物の下端部の厚みが厚くなりキヤスタブル
の剥落損耗にも対応している。 Furthermore, by squeezing the core metal 2, the thickness of the lower end of the outer castable refractory becomes thicker, thereby dealing with peeling and wear of the castable.
(考案の効果)
本考案をRH式真空脱ガス装置の浸漬管に使用
した結果、耐火煉瓦層は80チヤージ後においても
亀裂が認められず、耐用寿命も従来法に比較し50
%程度改善され使用後の解体調査の結果において
も芯金の変形及び溶失も認められなかつた。(Effects of the invention) As a result of using this invention in the immersion pipe of an RH type vacuum degassing equipment, no cracks were observed in the refractory brick layer even after 80 charges, and the service life was 50 years longer than that of the conventional method.
% improvement, and no deformation or melting of the core metal was observed even in the results of a disassembly inspection after use.
第1図は本考案による浸漬管の構造正面断面
図、第2図、第3図は従来法の浸漬管の構造正面
断面図、第4図は従来法の最下段耐火煉瓦の支持
金具に起因する亀裂発生状態図、第5図は浸漬管
の溶損状態図である。
1……フランジ、2……円筒状芯金、3a……
キヤスタブル耐火物層、3b……外周キヤスタブ
ル耐火物層、4……耐火煉瓦層、4a……最下段
耐火煉瓦、5……支持金具、6……傾斜部、11
……亀裂、12……溶損部。
Figure 1 is a front sectional view of the structure of the immersion pipe according to the present invention, Figures 2 and 3 are front sectional views of the structure of the immersion pipe of the conventional method, and Figure 4 is the structure due to the support metal fittings of the lowermost refractory brick of the conventional method. Fig. 5 is a diagram showing the state of crack occurrence, and Fig. 5 is a diagram of the state of melting and damage of the immersion pipe. 1...Flange, 2...Cylindrical core metal, 3a...
Castable refractory layer, 3b...Outer castable refractory layer, 4...Refractory brick layer, 4a...Lowermost refractory brick, 5...Supporting metal fittings, 6...Slope portion, 11
...Crack, 12...Erosion part.
Claims (1)
面にキヤスタブル耐火物層3aを介して円筒状に
積付けた耐火煉瓦層4を設けるとともに、前記芯
金2の外周面をキヤスタブル耐火物層3bで構成
した浸漬管において、前記芯金2の長さの1/3以
下の下端に内周側へ向つて傾斜部6を形成せしめ
てなる真空脱ガス装置用浸漬管。 A refractory brick layer 4 stacked in a cylindrical manner via a castable refractory layer 3a is provided on the inner circumferential surface of a cylindrical cored metal 2 having a flange 1 at the upper end, and the outer circumferential surface of the cored metal 2 is covered with a castable refractory. A immersion tube for a vacuum degassing device, comprising a immersion tube composed of a layer 3b, in which a sloped portion 6 is formed toward the inner circumference at the lower end of one-third or less of the length of the core bar 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986095368U JPH0448Y2 (en) | 1986-06-24 | 1986-06-24 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1986095368U JPH0448Y2 (en) | 1986-06-24 | 1986-06-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS632760U JPS632760U (en) | 1988-01-09 |
JPH0448Y2 true JPH0448Y2 (en) | 1992-01-06 |
Family
ID=30959820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1986095368U Expired JPH0448Y2 (en) | 1986-06-24 | 1986-06-24 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0448Y2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5241305B2 (en) * | 1973-03-01 | 1977-10-18 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS552025Y2 (en) * | 1975-09-18 | 1980-01-19 | ||
JPS57150544U (en) * | 1981-03-13 | 1982-09-21 | ||
JPS60105643U (en) * | 1983-12-21 | 1985-07-18 | ハリマセラミック株式会社 | Reflux pipe of vacuum degassing equipment |
-
1986
- 1986-06-24 JP JP1986095368U patent/JPH0448Y2/ja not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5241305B2 (en) * | 1973-03-01 | 1977-10-18 |
Also Published As
Publication number | Publication date |
---|---|
JPS632760U (en) | 1988-01-09 |
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