JP3361584B2 - Muffle for vertical heat treatment furnace and vertical heat treatment furnace - Google Patents
Muffle for vertical heat treatment furnace and vertical heat treatment furnaceInfo
- Publication number
- JP3361584B2 JP3361584B2 JP29742693A JP29742693A JP3361584B2 JP 3361584 B2 JP3361584 B2 JP 3361584B2 JP 29742693 A JP29742693 A JP 29742693A JP 29742693 A JP29742693 A JP 29742693A JP 3361584 B2 JP3361584 B2 JP 3361584B2
- Authority
- JP
- Japan
- Prior art keywords
- muffle
- end portion
- inner circumference
- metal strip
- heat insulating
- 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 - Fee Related
Links
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Tunnel Furnaces (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は竪型熱処理炉用のマッフ
ル及び竪型熱処理炉に関する。例えば金属ストリップを
焼鈍処理する場合に竪型熱処理炉が利用される。該竪型
熱処理炉は耐火材が内張りされた円筒形の炉体の内部に
円筒形のマッフルが装備されており、該炉体には該マッ
フルとの間で加熱源が装備されていて、該マッフルの上
端及び下端にそれぞれシール装置が取付けられて成るも
ので、下端のシール装置→マッフル→上端のシール装置
の順で金属ストリップを連続搬送しつつ該マッフルの内
部で所定雰囲気下に熱処理するものである。本発明はか
かる竪型熱処理炉用のマッフル及び竪型熱処理炉の改良
に関する。FIELD OF THE INVENTION The present invention relates to a muffle and a vertical heat treatment furnace for a vertical heat treatment furnace. For example, a vertical heat treatment furnace is used when annealing a metal strip. The vertical heat treatment furnace is equipped with a cylindrical muffle inside a cylindrical furnace body lined with refractory material, and the furnace body is equipped with a heating source between the muffle and A sealing device is attached to each of the upper and lower ends of the muffle, and the metal strip is heat-treated in a predetermined atmosphere inside the muffle while continuously transporting the metal strip in the order of the lower sealing device → the muffle → the upper sealing device. Is. The present invention relates to an improvement of such a muffle for a vertical heat treatment furnace and a vertical heat treatment furnace.
【０００２】[0002]
【従来の技術】従来、上記のような竪型熱処理炉用のマ
ッフルとして、全体の内周が同一径に形成された直筒状
の円筒形のものが使用されている（特公平２−２０７
３）。ところが、かかる従来のマッフルには、その具体
的使用における要請から結果的に全体が大円筒形のもの
になってしまい、該マッフルが高価な耐熱鋼製のもので
あることもあって、非経済的であるという欠点がある。2. Description of the Related Art Conventionally, as a muffle for a vertical heat treatment furnace as described above, a straight cylinder having a uniform inner diameter is used (Japanese Patent Publication No. 2-207).
3). However, such a conventional muffle has a large cylindrical shape as a result of a request for its specific use, and the muffle is made of expensive heat-resistant steel. It has the disadvantage of being targeted.
【０００３】マッフルを炉体の内部に装備した竪型熱処
理炉で金属ストリップを連続搬送しつつ熱処理する場
合、該マッフルの上端部及び下端部の内周には、該マッ
フルの上端及び下端からの熱放散を防止するために、該
金属ストリップの通過口が形成された全体として筒状の
断熱材が取付けられる。マッフルの上端部及び下端部の
内周は、金属ストリップの幅、連続搬送される金属スト
リップが断熱材に接触しないようにするための隙間及び
金属ストリップの幅方向における断熱材の厚さを見込ん
だ大きさにしなければならないのであるが、上端部、下
端部及び中間部の内周が同一径に形成された直筒状の円
筒形の従来のマッフルでは、全体がこれらを見込んだ大
きさのものとなり、したがって全体が大円筒形のものに
なってしまうのである。In the vertical heat treatment furnace equipped with the muffle inside the furnace body, the metal strip is heat-treated while being continuously conveyed, the inner periphery of the upper end and the lower end of the muffle is located at the upper and lower ends of the muffle. In order to prevent heat dissipation, a generally tubular insulation with a passage for the metal strip is installed. The inner circumferences of the upper and lower ends of the muffle allow for the width of the metal strip, a gap for preventing the continuously conveyed metal strip from contacting the heat insulating material, and the thickness of the heat insulating material in the width direction of the metal strip. Although it must be sized, the conventional straight cylindrical cylindrical muffle in which the inner circumferences of the upper end, lower end and middle part are formed to have the same diameter, the entire size is expected in these. Therefore, the whole becomes a large cylinder.
【０００４】金属ストリップの幅方向におけるマッフル
の上端部及び下端部の内周には断熱材を取付けないよう
にし、したがってその分だけ内径の小さい円筒形のマッ
フルにすることも考えられるが、このようにすると、金
属ストリップからの輻射熱等によって断熱材の取付けら
れていない部分だけが高温になり、断熱材の取付けられ
ている部分と取付けられていない部分との間で温度差が
生じ、そのためマッフルに大きな熱応力が発生する。か
かる熱応力の発生は特に、下端部よりも金属ストリップ
からの輻射熱等が大きい上端部において問題である。It is conceivable that no heat insulating material is attached to the inner circumferences of the upper and lower ends of the muffle in the width direction of the metal strip, so that a cylindrical muffle having a smaller inner diameter is considered. When set to, the radiant heat from the metal strip raises the temperature of only the part where the heat insulating material is not attached, causing a temperature difference between the part where the heat insulating material is attached and the part where the heat insulating material is not attached. Large thermal stress occurs. The generation of such thermal stress is a problem particularly in the upper end portion where the radiation heat from the metal strip is larger than the lower end portion.
【０００５】[0005]
【発明が解決しようとする課題】本発明が解決しようと
する課題は、従来の竪型熱処理炉用のマッフルでは、そ
の具体的使用における要請から結果的に全体が大円筒形
のものになってしまい、非経済的である点である。The problem to be solved by the present invention is that the conventional muffle for the vertical heat treatment furnace has a large cylindrical shape as a whole due to the requirement for its specific use. The point is that it is uneconomical.
【０００６】[0006]
【課題を解決するための手段】しかして本発明は、竪型
熱処理炉の炉体の内部に装備されるマッフルであって、
上端部及び／又は下端部の内周が直筒状の中間部の内周
よりも広径に形成されて成ることを特徴とするマッフル
と、耐火材が内張りされた炉体の内部に上端部及び／又
は下端部の内周が直筒状の中間部の内周よりも広径に形
成され且つ広径に形成された該上端部及び／又は該下端
部の内周に筒状の断熱材が取付けられたマッフルが装備
されて成ることを特徴とする竪型熱処理炉とに係る。DISCLOSURE OF THE INVENTION The present invention is a muffle equipped inside the furnace body of a vertical heat treatment furnace,
A muffle characterized in that the inner circumference of the upper end portion and / or the lower end portion is formed to have a wider diameter than the inner circumference of the middle portion of the straight tubular shape, and the upper end portion and the inside of the furnace body lined with the refractory material. The inner circumference of the lower end is formed wider than the inner circumference of the intermediate portion having a straight tubular shape, and a cylindrical heat insulating material is attached to the inner circumference of the upper end and / or the lower end formed to have a larger diameter. The present invention relates to a vertical heat treatment furnace, which is characterized by being equipped with a muffle.
【０００７】本発明のマッフルは上端部及び／又は下端
部の内周が直筒状の中間部の内周よりも広径に形成され
て成るものである。上端部及び／又は下端部の内周をこ
れらの間の長尺な直筒状の中間部の内周よりも広径に形
成し、広径に形成した部分の内周に金属ストリップの通
過口が形成された全体として筒状の断熱材を取付け得る
ようにするのである。In the muffle of the present invention, the inner circumference of the upper end portion and / or the lower end portion is formed to be wider than the inner circumference of the straight cylindrical intermediate portion. The inner circumference of the upper end portion and / or the lower end portion is formed to have a larger diameter than the inner circumference of the long straight tubular intermediate portion between them, and the passage of the metal strip is formed on the inner circumference of the portion formed to have a large diameter. The formed tubular heat insulating material can be attached.
【０００８】広径に形成した上端部及び／又は下端部は
これらと中間部との境界が折り目となるような縦断面多
角形状に形成してもよいが、かかる折り目が存在しない
ラッパ状に形成するのが好ましい。広径に形成した上端
部及び／又は下端部を中間部に対してラッパ状にすなわ
ちあたかもアール加工が施されたように形成する方が強
度に優れるからである。The upper end portion and / or the lower end portion formed to have a wide diameter may be formed in a polygonal shape in a vertical cross section such that a boundary between the upper end portion and / or the lower end portion becomes a fold, but it is formed in a trumpet shape without such a fold. Preferably. This is because it is more excellent in strength to form the upper end portion and / or the lower end portion having a wide diameter in a trumpet shape with respect to the intermediate portion, that is, as if the upper end portion and / or the lower end portion are rounded.
【０００９】またマッフルの具体的使用に際して、該マ
ッフルの上端部及び下端部の内周を中間部の内周よりも
広径に形成した場合には、該上端部及び該下端部の内周
に、金属ストリップの通過口が形成された全体として筒
状の断熱材を、金属ストリップの幅方向における該断熱
材の内周とこれに対応する中間部の内周とが同一線上す
なわち具体的使用においては同一鉛直線上に存在するよ
うに取付けるのが好ましい。When the muffle is used concretely, if the inner circumferences of the upper end and the lower end of the muffle are formed wider than the inner circumference of the middle part, the inner circumference of the upper end and the lower end are , A cylindrical heat insulating material having a passage for the metal strip is formed, and the inner circumference of the heat insulating material in the width direction of the metal strip and the inner circumference of the corresponding intermediate portion are on the same line, that is, in a specific use. Are preferably mounted so that they are on the same vertical line.
【００１０】更にマッフルの上端部又は下端部の内周を
中間部の内周よりも広径に形成し、該マッフルの下端部
又は上端部の内周を中間部の内周と同一径に形成した場
合には、広径に形成した上端部又は下端部の内周に、前
述した場合と同様、全体として筒状の断熱材を取付け、
中間部の内周と同一径に形成した下端部又は上端部の内
周のうちで金属ストリップの表面と相対する部分に該金
属ストリップをその両側から挟む状態で半割り円柱状の
断熱材を取付けるのが好ましい。この場合、特にマッフ
ルの下端部の内周を中間部の内周よりも広径に形成し、
上端部の内周を該中間部の内周と同一径に形成した場合
には、熱応力の発生を抑えるため、内周に半割り円柱状
の断熱材を取付けた部分の外周にも半割りパイプ状の断
熱材を取付けるのが好ましい。Further, the inner circumference of the upper end portion or the lower end portion of the muffle is formed wider than the inner circumference of the middle portion, and the inner circumference of the lower end portion or the upper end portion of the muffle is formed to have the same diameter as the inner circumference of the middle portion. In this case, a cylindrical heat insulating material as a whole is attached to the inner circumference of the upper end or the lower end formed to have a large diameter, as in the case described above.
A semi-circular columnar heat insulating material is attached to a portion of the inner circumference of the lower end portion or the upper end portion formed to have the same diameter as the inner circumference of the middle portion, facing the surface of the metal strip, with the metal strip sandwiched from both sides thereof. Is preferred. In this case, the inner circumference of the lower end of the muffle is formed wider than the inner circumference of the middle part,
When the inner circumference of the upper end is formed to have the same diameter as the inner circumference of the intermediate part, in order to suppress the occurrence of thermal stress, the inner circumference is also halved on the outer circumference of the part where a columnar heat insulating material is attached. It is preferable to attach a pipe-shaped heat insulating material.
【００１１】本発明の竪型熱処理炉は、耐火材が内張り
された炉体の内部に以上説明したようなマッフルすなわ
ち上端部及び／又は下端部の内周が直筒状の中間部の内
周よりも広径に形成され且つ広径に形成された該上端部
及び／又は該下端部の内周に筒状の断熱材が取付けられ
たマッフルが装備されて成るものである。In the vertical heat treatment furnace of the present invention, the muffle as described above, that is, the inner circumference of the upper end portion and / or the lower end portion of the furnace body lined with the refractory material is more than the inner circumference of the middle portion of the straight tubular shape. Also, a muffle in which a cylindrical heat insulating material is attached to the inner circumference of the upper end and / or the lower end formed to have a wide diameter is provided.
【００１２】マッフルを炉体の内部へ装備するに際して
は、該マッフルの広径に形成された上端部及び／又は下
端部と中間部との境界が該炉体を形成する耐火材で包囲
される箇所に位置決めされるように装備するのが好まし
い。例えばマッフルの上端部及び下端部が広径に形成さ
れている場合には、該上端部と中間部との境界が炉体の
頂部における耐火材で包囲される箇所に位置決めされ、
また該下端部と中間部との境界が炉体の底部における耐
火材で包囲される箇所に位置決めされるように装備する
のである。マッフルの広径に形成された上端部と中間部
との境界が炉体の頂部よりも上方に位置すると、或はマ
ッフルの広径に形成された下端部と中間部との境界が炉
体の底部よりも下方に位置すると、内周に断熱材が取付
けられていない中間部が外気に直接さらされることにな
って、該中間部からの熱放散が生じ、逆にマッフルの広
径に形成された上端部と中間部との境界が炉体の頂部よ
りも下方に位置すると、或はマッフルの広径に形成され
た下端部と中間部との境界が炉体の底部よりも上方に位
置すると、該境界が炉内の高温にさらされることになっ
て大きな応力が発生し、該境界が強度不足となるからで
ある。When the muffle is installed inside the furnace body, the boundary between the upper end portion and / or the lower end portion formed to have a large diameter and the middle portion is surrounded by the refractory material forming the furnace body. It is preferably equipped so as to be positioned at a location. For example, when the upper end and the lower end of the muffle are formed to have a wide diameter, the boundary between the upper end and the middle part is positioned at a place surrounded by the refractory material at the top of the furnace body,
Further, the boundary between the lower end portion and the intermediate portion is installed so as to be positioned at a portion surrounded by the refractory material in the bottom portion of the furnace body. If the boundary between the upper end and the middle of the muffle, which is formed wider, is located higher than the top of the furnace body, or the boundary between the lower end and the middle of the furnace, where the muffle is formed wider, If it is located below the bottom, the middle part, which has no heat insulating material attached to the inner circumference, is directly exposed to the outside air, and heat is dissipated from the middle part, and conversely the muffle is formed to have a large diameter. When the boundary between the upper end and the middle part is located lower than the top of the furnace body, or the boundary between the lower end and the middle part formed with a larger diameter of the muffle is located higher than the bottom part of the furnace body. This is because the boundary is exposed to the high temperature in the furnace, large stress is generated, and the strength of the boundary becomes insufficient.
【００１３】[0013]
【作用】マッフルの具体的使用に際しては直筒状の中間
部の内周よりも広径に形成された上端部及び／又は下端
部の内周に金属ストリップの通過口が形成された全体と
して筒状の断熱材を取付け、またその内周が中間部の内
周と同一径に形成された下端部又は上端部の該内周のう
ちで金属ストリップの表面と相対する部分に該金属スト
リップを両側から挟む状態で半割り円柱状の断熱材を取
付けるので、マッフルの上端及び下端からの熱放散を防
止できる。しかもマッフルの広径に形成された上端部及
び／又は下端部の内周には筒状の断熱材を金属ストリッ
プの幅方向における該断熱材の内周とこれに対応するマ
ッフルの中間部の内周とが同一鉛直線上に存在するよう
に取付け、またその内周が中間部の内周と同一径に形成
された下端部又は上端部の該内周のうちで金属ストリッ
プの幅方向における部分には断熱材を取付けないので、
金属ストリップの幅、連続搬送される金属ストリップが
断熱材に接触しないようにするための隙間及び断熱材の
厚さを見込んだ大きさの内周にする必要があるのはマッ
フルの広径に形成された上端部及び／又は下端部だけで
あり、これらの間の長尺な中間部の内周は金属ストリッ
プの幅及び連続搬送される金属ストリップが中間部に接
触しないようにするための隙間を見込んだ大きさにすれ
ばよいため、全体としてマッフルを従来よりも小円筒形
にでき、それだけ経済的である。When the muffle is used concretely, a cylindrical shape is formed as a whole, in which the passage of the metal strip is formed in the inner circumference of the upper end and / or the lower end formed to have a diameter larger than the inner circumference of the middle portion of the straight tube shape. The heat insulating material is attached, and the metal strip is attached from both sides to a portion of the inner periphery of the lower end portion or the upper end portion formed to have the same diameter as the inner periphery of the intermediate portion, the portion facing the surface of the metal strip. Since the half-columnar heat insulating material is attached in the sandwiched state, heat dissipation from the upper and lower ends of the muffle can be prevented. Moreover, a cylindrical heat insulating material is provided on the inner circumference of the upper end portion and / or the lower end portion formed in a wide diameter of the muffle in the inner circumference of the heat insulating material in the width direction of the metal strip and the middle portion of the corresponding muffle. It is attached so that the circumference is on the same vertical line, and the inner circumference is at the portion in the width direction of the metal strip of the inner circumference of the lower end portion or the upper end portion formed with the same diameter as the inner circumference of the intermediate portion. Does not install insulation, so
The width of the metal strip, the gap to prevent the continuously transported metal strip from coming into contact with the heat insulating material, and the thickness of the heat insulating material need to be the inner circumference. The inner circumference of the elongated middle portion between the upper and / or lower end is a gap for preventing the width of the metal strip and the continuously conveyed metal strip from contacting the middle portion. Since the size of the muffle is sufficient, the muffler as a whole can be made into a smaller cylindrical shape than before, which is economical.
【００１４】[0014]
【実施例】図１は本発明の一実施例を略示する一部省略
の縦断面図、図２は図１と同じ一実施例を略示する部分
横断面図である。耐火材１１が内張りされた炉体２１の
内部にマッフル３１が装備されている。マッフル３１は
上端部４１及び下端部５１の内周がこれらの間の長尺な
直筒状の中間部６１の内周よりも広径に形成されてい
る。上端部４１及び下端部５１の内周には、金属ストリ
ップＡの通過口７１，７２が形成された全体として筒状
の断熱材８１，８２が、金属ストリップＡの幅方向にお
ける断熱材の内周面８１ａ，８２ａとこれに対応するマ
ッフル３１の中間部６１の内周面６１ａとが同一鉛直線
上に存在するように取付けられている。1 is a partially omitted vertical sectional view schematically showing an embodiment of the present invention, and FIG. 2 is a partial transverse sectional view schematically showing the same embodiment as FIG. A muffle 31 is installed inside a furnace body 21 lined with the refractory material 11. The muffle 31 is formed such that the inner circumferences of the upper end portion 41 and the lower end portion 51 are wider than the inner circumference of a long straight tubular intermediate portion 61 between them. On the inner circumferences of the upper end portion 41 and the lower end portion 51, there are provided cylindrical heat insulating materials 81 and 82 in which the passage openings 71 and 72 of the metal strip A are formed. The surfaces 81a and 82a and the corresponding inner peripheral surface 61a of the intermediate portion 61 of the muffle 31 are attached so as to be on the same vertical line.
【００１５】図３は本発明の他の一実施例を略示する一
部省略の縦断面図である。耐火材１２が内張りされた炉
体２２の内部にマッフル３２が装備されている。マッフ
ル３２は上端部４２及び下端部５２の内周がこれらの間
の長尺な直筒状の中間部６２の内周よりも広径に形成さ
れている。上端部４２及び下端部５２の内周には、金属
ストリップＢの通過口７３，７４が形成された全体とし
て筒状の断熱材８３，８４が、金属ストリップＢの幅方
向における断熱材の内周面８３ａ，８４ａとこれに対応
するマッフル３２の中間部６２の内周面６２ａとが同一
鉛直線上に存在するように取付けられている。FIG. 3 is a partially omitted vertical sectional view schematically showing another embodiment of the present invention. A muffle 32 is installed inside the furnace body 22 lined with the refractory material 12. The muffle 32 is formed such that the inner circumferences of the upper end portion 42 and the lower end portion 52 are wider than the inner circumference of the long straight cylindrical intermediate portion 62 between them. On the inner circumferences of the upper end portion 42 and the lower end portion 52, there are provided cylindrical heat insulating materials 83 and 84 in which passage holes 73 and 74 for the metal strip B are formed. The surfaces 83a, 84a and the corresponding inner peripheral surface 62a of the intermediate portion 62 of the muffle 32 are attached so as to be on the same vertical line.
【００１６】図１に示した一実施例におけるマッフル３
１の上端部４１及び下端部５１が中間部６１に対して縦
断面多角形状に形成されており、上端部４１と中間部６
１との境界４１ａ及び下端部５１と中間部６１との境界
５１ａが折り目となっているが、図３に示した他の一実
施例におけるマッフル３２の上端部４２及び下端部５２
は中間部６２に対してラッパ状に形成されており、上端
部４２と中間部６２との境界４２ａ及び下端部５２と中
間部６２との境界５２ａは折り目のないあたかもアール
加工が施されたようになっている。しかも図３に示した
他の一実施例では、境界４２ａが炉体２２の頂部におけ
る耐火材１２ａで包囲される箇所に位置決めされてお
り、また境界５２ａが炉体２２の底部における耐火材１
２ｂで包囲される箇所に位置決めされている。Muffle 3 in the embodiment shown in FIG.
1 has an upper end portion 41 and a lower end portion 51 which are formed in a polygonal shape in a vertical cross section with respect to the intermediate portion 61.
The boundary 41a with 1 and the boundary 51a with the lower end 51 and the intermediate part 61 are folds, but the upper end 42 and the lower end 52 of the muffle 32 in another embodiment shown in FIG.
Is formed in a trumpet shape with respect to the intermediate portion 62, and the boundary 42a between the upper end portion 42 and the intermediate portion 62 and the boundary 52a between the lower end portion 52 and the intermediate portion 62 are as if they were rounded without folds. It has become. Moreover, in another embodiment shown in FIG. 3, the boundary 42a is positioned at the top of the furnace body 22 at a position surrounded by the refractory material 12a, and the boundary 52a is located at the bottom of the furnace body 22.
It is positioned at a location surrounded by 2b.
【００１７】図４は本発明の更に他の一実施例を略示す
る一部省略の縦断面図、図５は図４と同じ一実施例を略
示する部分横断面図である。耐火材１３が内張りされた
炉体２３の内部にマッフル３３が装備されている。マッ
フル３３は上端部４３の内周が長尺な直筒状の中間部６
３の内周よりも広径に形成されており、また下端部５３
の内周が長尺な直筒状の中間部６３の内周と同一径に形
成されている。上端部４３の内周には、金属ストリップ
Ｃの通過口７５が形成された全体として筒状の断熱材８
５が、金属ストリップＣの幅方向における断熱材の内周
面８５ａとこれに対応するマッフル３３の中間部６３の
内周面６３ａとが同一鉛直線上に存在するように取付け
られている。また下端部５３の内周のうちで金属ストリ
ップＣの表面と相対する部分には金属ストリップＣをそ
の両側から挟む状態で半割り円柱状の断熱材８６ａ，８
６ｂが取付けられており、断熱材８６ａと断熱材８６ｂ
との間に金属ストリップＣの通過口７６が形成されてい
て、断熱材８６ａ，８６ｂが取付けられた部分の外周に
も半割りパイプ状の断熱材８６ｃ，８６ｄが取付けら
れ、断熱材８６ｃ，８６ｄは中央部が両側部よりもやや
肉圧に形成されている。FIG. 4 is a partially omitted vertical sectional view schematically showing still another embodiment of the present invention, and FIG. 5 is a partial transverse sectional view schematically showing the same embodiment as FIG. A muffle 33 is installed inside the furnace body 23 lined with the refractory material 13. The muffle 33 has a straight tube-shaped intermediate portion 6 with an inner periphery of an upper end portion 43 being long.
3 is formed to have a diameter larger than the inner circumference of the inner circumference of the lower end 53
The inner circumference of is formed to have the same diameter as the inner circumference of the long straight cylindrical intermediate portion 63. On the inner circumference of the upper end portion 43, a heat insulating material 8 having a tubular shape as a whole, in which a passage opening 75 for the metal strip C is formed.
5 is attached such that the inner peripheral surface 85a of the heat insulating material in the width direction of the metal strip C and the corresponding inner peripheral surface 63a of the intermediate portion 63 of the muffle 33 are on the same vertical line. Further, in a portion of the inner circumference of the lower end portion 53 that faces the surface of the metal strip C, the metal strip C is sandwiched from both sides thereof, and the heat insulating materials 86a, 8 having a half-columnar shape.
6b is attached, the heat insulating material 86a and the heat insulating material 86b
And a half-pipe-shaped heat insulating material 86c, 86d is also attached to the outer circumference of the portion where the metal strip C passage opening 76 is formed between the heat insulating material 86c, 86d. Is formed so that the central portion thereof is slightly thicker than the both side portions.
【００１８】図４に示した更に他の一実施例も、図３に
示した他の一実施例の場合と同様、マッフル３３の上端
部４３は中間部６３に対してラッパ状に形成されてお
り、上端部４３と中間部６３との境界４３ａは折り目の
ないあたかもアール加工が施されたようになっていて、
境界４３ａが炉体２３の頂部における耐火材１３ａで包
囲される箇所に位置決めされている。In still another embodiment shown in FIG. 4, similarly to the other embodiment shown in FIG. 3, the upper end portion 43 of the muffle 33 is formed in a trumpet shape with respect to the intermediate portion 63. The boundary 43a between the upper end portion 43 and the intermediate portion 63 is as if it had been rounded without folds.
The boundary 43a is positioned at a position on the top of the furnace body 23 surrounded by the refractory material 13a.
【００１９】[0019]
【発明の効果】既に明らかなように、以上説明した本発
明には、竪型熱処理炉でのその具体的使用における要請
に応えて、マッフルを全体として小円筒形にでき、それ
だけ経済的であるという効果がある。As is apparent from the above, according to the present invention described above, the muffler can be made into a small cylindrical shape as a whole in response to the demand in its concrete use in the vertical heat treatment furnace, which is economical. There is an effect.
【図１】本発明の一実施例を略示する一部省略の縦断面
図。FIG. 1 is a partially omitted vertical sectional view schematically showing an embodiment of the present invention.
【図２】図１と同じ一実施例を略示する部分横断面図。FIG. 2 is a partial cross-sectional view schematically showing the same embodiment as FIG.
【図３】本発明の他の一実施例を略示する一部省略の縦
断面図。FIG. 3 is a partially omitted vertical sectional view schematically showing another embodiment of the present invention.
【図４】本発明の更に他の一実施例を略示する一部省略
の縦断面図。FIG. 4 is a partially omitted vertical sectional view schematically showing still another embodiment of the present invention.
【図５】図４と同じ一実施例を略示する部分横断面図。5 is a partial cross-sectional view schematically showing the same embodiment as FIG.
１１，１２，１３・・・耐火材、２１，２２，２３・・
・炉体、３１，３２，３３・・・マッフル、４１，４
２，４３・・・上端部、５１，５２，５３・・・下端
部、６１，６２，６３・・・中間部、７１〜７６・・・
通過口、８１〜８５，８６ａ〜８６ｄ・・・断熱材、
Ａ，Ｂ，Ｃ・・・金属ストリップ11,12,13 ... Refractory material 21,22,23 ...
・ Furnace, 31, 32, 33 ... Muffle, 41, 4
2, 43 ... Upper end portion, 51, 52, 53 ... Lower end portion, 61, 62, 63 ... Intermediate portion, 71-76 ...
Passage ports, 81-85, 86a-86d ... Insulation material,
A, B, C ... Metal strip
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−225780（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C21D 9/66 F27B 5/10 F27B 9/28 F27B 9/30 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-225780 (JP, A) (58) Fields investigated (Int.Cl. 7 , DB name) C21D 9/66 F27B 5/10 F27B 9 / 28 F27B 9/30
Claims (6)
マッフルであって、上端部及び／又は下端部の内周が直
筒状の中間部の内周よりも広径に形成されて成ることを
特徴とするマッフル。1. A muffle provided inside a furnace body of a vertical heat treatment furnace, wherein an inner circumference of an upper end portion and / or a lower end portion is formed to be wider than an inner circumference of a straight cylindrical intermediate portion. A muffle characterized by being made.
部が中間部に対してラッパ状に形成されて成る請求項１
記載のマッフル。2. A wide-diameter upper end portion and / or lower end portion formed in a trumpet shape with respect to an intermediate portion.
Muffle described.
周に、金属ストリップの通過口が形成された全体として
筒状の断熱材が、該金属ストリップの幅方向における該
断熱材の内周とこれに対応するマッフルの中間部の内周
とが同一線上に存在するように取付けられて成る請求項
１又は２記載のマッフル。3. A generally cylindrical heat insulating material having a wide-diameter upper end portion and a lower end portion formed with inner peripheries of passages for the metal strip, wherein the heat insulating material has a width in the width direction of the metal strip. The muffle according to claim 1 or 2, wherein the inner circumference and the corresponding inner circumference of the middle portion of the muffle are mounted so as to be on the same line.
周に、金属ストリップの通過口が形成された全体として
筒状の断熱材が、該金属ストリップの幅方向における該
断熱材の内周とこれに対応するマッフルの中間部との内
周が同一線上に存在するように取付けられ、また該中間
部の内周と同一径に形成された下端部又は上端部の内周
のうちで該金属ストリップの表面と相対する部分に該金
属ストリップを両側から挟む状態で半割り円柱状の断熱
材が取付けられて成る請求項１又は２記載のマッフル。4. A generally cylindrical heat insulating material having a wide-diameter upper end portion or a lower end portion formed with an inner periphery of a metal strip passage opening, wherein the heat insulating material has a width in the width direction of the metal strip. Of the inner circumference of the lower end portion or the upper end portion formed so that the inner circumference and the corresponding inner circumference of the intermediate portion of the muffle are on the same line, and formed to have the same diameter as the inner circumference of the intermediate portion. 3. The muffle according to claim 1 or 2, wherein a half-columnar heat insulating material is attached to a portion facing the surface of the metal strip so as to sandwich the metal strip from both sides.
項３又は４記載のマッフルが装備されて成ることを特徴
とする竪型熱処理炉。5. A vertical heat treatment furnace, wherein the muffle according to claim 3 or 4 is equipped inside a furnace body lined with a refractory material.
／又は下端部と中間部との境界が炉体を形成する耐火材
で包囲される箇所に位置決めされて成る請求項５記載の
竪型熱処理炉。6. The vertical shaft according to claim 5, wherein a boundary between an upper end portion and / or a lower end portion formed in a wide diameter of the muffle and an intermediate portion is positioned at a position surrounded by a refractory material forming a furnace body. Type heat treatment furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29742693A JP3361584B2 (en) | 1992-11-02 | 1993-11-01 | Muffle for vertical heat treatment furnace and vertical heat treatment furnace |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-317744 | 1992-11-02 | ||
| JP31774492 | 1992-11-02 | ||
| JP29742693A JP3361584B2 (en) | 1992-11-02 | 1993-11-01 | Muffle for vertical heat treatment furnace and vertical heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0797636A JPH0797636A (en) | 1995-04-11 |
| JP3361584B2 true JP3361584B2 (en) | 2003-01-07 |
Family
ID=26561125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29742693A Expired - Fee Related JP3361584B2 (en) | 1992-11-02 | 1993-11-01 | Muffle for vertical heat treatment furnace and vertical heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3361584B2 (en) |
-
1993
- 1993-11-01 JP JP29742693A patent/JP3361584B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0797636A (en) | 1995-04-11 |
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