JP2000240904A - Supporting structure of furnace shell protruding section of radiant tube - Google Patents

Supporting structure of furnace shell protruding section of radiant tube

Info

Publication number
JP2000240904A
JP2000240904A JP11041972A JP4197299A JP2000240904A JP 2000240904 A JP2000240904 A JP 2000240904A JP 11041972 A JP11041972 A JP 11041972A JP 4197299 A JP4197299 A JP 4197299A JP 2000240904 A JP2000240904 A JP 2000240904A
Authority
JP
Japan
Prior art keywords
burner
radiant tube
resistance
tube
furnace
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.)
Pending
Application number
JP11041972A
Other languages
Japanese (ja)
Inventor
Yoshiharu Fujiwara
義治 藤原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP11041972A priority Critical patent/JP2000240904A/en
Publication of JP2000240904A publication Critical patent/JP2000240904A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To reduce the slide resistance of a radiant tube on the bung side by supporting a burner or a recuperater main body through a rotating body on the furnace shell protruding side of a radiant tube of a heat treatment furnace, and combining the section going through the furnace wall of the burner or the recuperater with a flexible combining body. SOLUTION: A resistance is eliminated by adopting a flexible combining body (bellows made of fabric) 4, and in order to reduce the deforming resistance of a connecting tube, the connecting tube is replaced by a flexible tube 5, and the resistance is reduced. For a rotating body (rolling body) 8 between a burner support 6 and a bearing fitting 7 on the bung side, a cylindrical roller is used. For the rolling body 8, article other than the cylindrical roller may be used as long as the slide resistance of which is small, and which can perform a positioning. Since the rolling body 8 is attached to the outside of a burner 82, the environmental condition is comparatively favorable. Even when a seizure occurs on a radiant tube support 11, a radiant tube 1 can freely extend to a burner 2 side. Therefore, a thermal stress is softened, a bending deformation is reduced, and life can be extended.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、熱処理炉内に設置
して、輻射熱源として使用するラジアントチューブのバ
ング側(炉殻突出し側)支持構造に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for supporting a radiant tube on a bang side (furnace shell projecting side) of a radiant tube used in a heat treatment furnace and used as a radiant heat source.

【0002】[0002]

【従来の技術】一般に、熱処理炉内に設置して輻射熱源
として使用する、W型、U型ラジアントチューブは、図
6に示すように支持されており、その特徴はレキュペレ
ータ3側のラジアントチューブ1とバング9は図8に詳
細を示すように、溶接固定されているか、又は図7に示
すように、バーナ2側のラジアントチューブ1とバング
9はわずかに隙間をもたせ、バング9の外側に金属ベロ
ーズ13を取付け、内部雰囲気ガスの洩れを防止すると
ともに、ラジアントチューブ1の熱膨張を逃す構造とし
ている。
2. Description of the Related Art In general, W-type and U-type radiant tubes installed in a heat treatment furnace and used as a radiant heat source are supported as shown in FIG. 8, and the radiant tube 1 on the side of the burner 2 and the bang 9 are slightly spaced from each other, as shown in FIG. The bellows 13 is attached to prevent leakage of the internal atmosphere gas and to release the thermal expansion of the radiant tube 1.

【0003】特殊な例としては、図10,図11に示す
ように、実公昭57−58187号公報のように、直管
形ラジアントチューブの伸縮側にコロを設け、熱膨張を
吸収するようにした技術もある。
As a special example, as shown in FIG. 10 and FIG. 11, as shown in Japanese Utility Model Publication No. 57-58187, a roller is provided on a telescopic side of a straight tube type radiant tube so as to absorb thermal expansion. Some technologies have been developed.

【0004】[0004]

【発明が解決しようとする課題】W型ラジアントチュー
ブ1の従来の支持構造では、図9(a)に示すように、
ラジアントチューブ1の熱膨張をサポート11が滑らか
に摺動することによって、図9(b)に示すように、熱
応力を緩和することができる。ところが実際の炉内では
ラジアントチューブ1をしばらく使用するとサポート1
1が焼付いて摺動不能となり、ラジアントチューブ1は
バング9側へ伸びようとする。この時、従来の支持構造
ではレキュペレータ3側は溶接固定されており、またバ
ーナ2側も以下の理由で滑らかに摺動できず、図9
(c)に示すように熱応力の増加によりラジアントチュ
ーブに曲りが発生し、寿命が低下する。
In the conventional support structure of the W-shaped radiant tube 1, as shown in FIG.
By smoothly sliding the support 11 on the thermal expansion of the radiant tube 1, thermal stress can be reduced as shown in FIG. 9B. However, if the radiant tube 1 is used for a while in the actual furnace, the support 1
As a result, the radiant tube 1 tends to extend toward the bang 9 side. At this time, in the conventional support structure, the recuperator 3 side is fixed by welding, and the burner 2 side cannot slide smoothly for the following reason.
As shown in (c), the radiant tube is bent due to an increase in thermal stress, and the life is shortened.

【0005】バーナ2側の摺動阻害理由は、ラジアント
チューブ1とバング9の隙間が小さく、熱膨張で接触し
て抵抗となること、金属ベローズ13より反力を受ける
ことに起因する。
[0005] The reason why the sliding of the burner 2 is hindered is that the clearance between the radiant tube 1 and the bang 9 is small, and the contact is caused by thermal expansion, thereby causing resistance, and receiving a reaction force from the metal bellows 13.

【0006】次に、直管型ラジアントチューブの伸縮側
支持技術として実公昭57−58187号公報には図1
0に示すように、転動体8を設け、熱膨張を吸収する手
段が提案されている。この技術には以下の問題があり、
完全に熱膨張を吸収することはできない。すなわち、短
管14の内部にベローズ(遮蔽膜)13を有しているた
め、この伸縮時の反力を受け完全に熱膨張を吸収できな
い。また、短管14の内部に転動体8を設置するため、
その機能チェック及び補修が容易にできない。さらに、
転動体8の構造と短管14の内部の環境から焼付を発生
しやすい。これは短管内部温度が200℃以上はあり、
転動体8の荷重を支える軸部の径が小さいため、接触面
圧が高くなるためである。
[0006] Japanese Utility Model Publication No. 57-58187 discloses a technique for supporting the expansion / contraction side of a straight tube type radiant tube as shown in FIG.
As shown in FIG. 0, means for providing a rolling element 8 and absorbing thermal expansion has been proposed. This technology has the following problems,
It cannot completely absorb thermal expansion. That is, since the short pipe 14 has the bellows (shielding film) 13 inside, it cannot receive the reaction force at the time of expansion and contraction to completely absorb the thermal expansion. In addition, in order to install the rolling element 8 inside the short pipe 14,
The function check and repair cannot be performed easily. further,
Seizure is likely to occur due to the structure of the rolling elements 8 and the environment inside the short pipe 14. This is because the temperature inside the short tube is 200 ° C or more,
This is because the diameter of the shaft supporting the load of the rolling elements 8 is small, so that the contact surface pressure increases.

【0007】本発明はこのような欠点を改善した技術を
提供することを目的とするものである。
An object of the present invention is to provide a technique in which such disadvantages are improved.

【0008】[0008]

【課題を解決するための手段】本発明は、前記問題点を
解決するためになされたもので、その技術手段は、バー
ナ又はレキュペレータ本体を熱処理炉のラジアントチュ
ーブの炉殻突出し側で、回転体を介して支え、バーナ又
はレキュペレータ本体が炉壁を貫通する部分を可撓性結
合体で結合したことを特徴としたラジアントチューブの
炉殻突出し部の支持構造である。すなわち、以下の部品
を配置し、バング側の摺動抵抗を軽減した。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its technical means is that a burner or a recuperator is provided with a rotating body on the side of a radiant tube of a heat treatment furnace at which a furnace shell protrudes. A support structure for a furnace shell projection of a radiant tube, characterized in that a portion through which a burner or a recuperator body penetrates a furnace wall is connected by a flexible coupling body. That is, the following components were arranged to reduce the sliding resistance on the bang side.

【0009】(1)金属ベローズを布製ベローズに変更
し、伸縮抵抗を軽減させた。
(1) The metal bellows is changed to a cloth bellows to reduce the stretching resistance.

【0010】(2)ラジアントチューブとバングの隙間
を広くし、接触を防止する。
(2) The gap between the radiant tube and the bang is widened to prevent contact.

【0011】(3)バーナの側面にバーナサポートを取
付け、バングに受け金物を取付け、その間に転動体を配
置することによって、滑らかな摺動を得ることができる
ようにした。この転動体は、温度的に高温でないので軸
付コロでも可である。
(3) Smooth sliding can be obtained by attaching a burner support to the side surface of the burner, attaching a receiving hardware to the bang, and arranging a rolling element between the burners. Since this rolling element is not high in temperature, a roller with a shaft can be used.

【0012】(4)バーナとレキュベレータを接続する
連結管を、パイプからフレキシブルチューブに変更し摺
動抵抗を軽減した。
(4) The connecting pipe connecting the burner and the recuperator is changed from a pipe to a flexible tube to reduce sliding resistance.

【0013】[0013]

【発明の実施の形態】図1は実施例の1つとしてバーナ
2側のみに本発明を適用した例を示しているが、レキュ
ベレータ3側にも適用可能である。本発明によれば、バ
ング9側へのラジアントチューブ1の熱膨張を阻害する
下記の要因をなくすことによって、滑らかな摺動を得る
ことができた。
FIG. 1 shows an embodiment in which the present invention is applied to only the burner 2 as one of the embodiments, but is also applicable to the recuperator 3. According to the present invention, smooth sliding could be obtained by eliminating the following factors that hinder the thermal expansion of the radiant tube 1 toward the bang 9 side.

【0014】(a)ラジアントチューブ1とバング9の
接触抵抗は図3に示すように、隙間を広げバーナサポー
ト6による位置決めによって接触防止を図った。図3は
図1のB部詳細図である。
(A) As shown in FIG. 3, the contact resistance between the radiant tube 1 and the bang 9 is widened to prevent the contact by positioning by the burner support 6. FIG. 3 is a detailed view of a portion B in FIG.

【0015】(b)ベローズ13の伸縮抵抗を低減し
た。すなわち、図3に示すように、布製ベローズ4の採
用で抵抗をなくするとともに、図2に示すように、図6
に示す従来の連結管12の変形抵抗を減少させるため、
これをフレキシブルチューブ5に取替えて抵抗を低減し
た。
(B) The expansion and contraction resistance of the bellows 13 is reduced. That is, as shown in FIG. 3, the resistance is eliminated by adopting the cloth bellows 4, and as shown in FIG.
In order to reduce the deformation resistance of the conventional connecting pipe 12 shown in FIG.
This was replaced with a flexible tube 5 to reduce the resistance.

【0016】図1は本発明の一実施例を示す図、図2は
そのA−A矢視図である。バーナ2側に本発明を適用し
た例で、前述のごとく、ラジアントチューブサポート1
1部に焼付きを生じた場合にも、バーナ2側に自由にラ
ジアントチューブ1が伸びることができるため、熱応力
が緩和され、曲り変形を減少させ寿命を延ばすことがで
きた。U型、W型ラジアントチューブ以外に直管型ラジ
アントチューブの伸縮側にも適用可能である。
FIG. 1 is a view showing one embodiment of the present invention, and FIG. 2 is a view taken on line AA of FIG. This is an example in which the present invention is applied to the burner 2 side.
Even when seizure occurs in one part, the radiant tube 1 can freely expand toward the burner 2 side, so that thermal stress is relaxed, bending deformation is reduced, and the life can be extended. In addition to the U-type and W-type radiant tubes, the present invention can be applied to the telescopic side of a straight tube type radiant tube.

【0017】実施例では図4,図5に示すように、バー
ナサポート6とバング9側受け金物7の間の転動体8に
円筒コロを使用した。転動体8は円筒コロ以外でも摺動
抵抗が小さく位置決めできるものであればよい。転動体
8をバーナ2の外部に取付けるため、環境条件が比較的
よい。
In the embodiment, as shown in FIGS. 4 and 5, a cylindrical roller is used for the rolling element 8 between the burner support 6 and the metal fitting 7 on the bang 9 side. The rolling element 8 is not limited to the cylindrical roller, and may be any element that has a small sliding resistance and can be positioned. Since the rolling elements 8 are mounted outside the burner 2, environmental conditions are relatively good.

【0018】[0018]

【発明の効果】本発明によれば、バング側のラジアント
チューブの摺動抵抗を軽減することによってラジアント
チューブに生ずる熱応力を緩和し変形による寿命短縮を
防止し寿命を向上させた。また、転動体を外部から見え
る位置に配置したことによって、点検、補修を容易に
し、その効果を継続して発揮できるようになった。
According to the present invention, the sliding resistance of the radiant tube on the bang side is reduced, thereby alleviating the thermal stress generated in the radiant tube, preventing the shortening of the life due to deformation, and improving the life. In addition, by arranging the rolling element at a position that can be seen from the outside, inspection and repair can be facilitated, and the effect can be continuously exhibited.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施例の側面図である。FIG. 1 is a side view of an embodiment of the present invention.

【図2】本発明の実施例の正面図(図1のA−A矢視
図)である。
FIG. 2 is a front view of the embodiment of the present invention (a view taken along the line AA in FIG. 1).

【図3】図1のB部詳細を示すバーナ側断面図である。FIG. 3 is a burner side sectional view showing details of a portion B in FIG. 1;

【図4】バーナサポート部の詳細図である。FIG. 4 is a detailed view of a burner support unit.

【図5】バーナサポート部の斜視図である。FIG. 5 is a perspective view of a burner support section.

【図6】従来技術の側面図である。FIG. 6 is a side view of the prior art.

【図7】図6のD部詳細図である。FIG. 7 is a detailed view of a portion D in FIG. 6;

【図8】図6のE部図である。FIG. 8 is a view of a part E in FIG. 6;

【図9】(a)常温時のラジアントチューブ、(b)ラ
ジアントチューブサポートが正常に動いた時の伸び、
(c)ラジアントチューブサポートが焼付けた時の変形
を示す説明図である。
FIG. 9 (a) Radiant tube at normal temperature, (b) Elongation when radiant tube support moves normally,
(C) It is explanatory drawing which shows the deformation | transformation when a radiant tube support is baked.

【図10】従来技術の全体図である。FIG. 10 is an overall view of the related art.

【図11】図10のF矢視図である。11 is a view as viewed from the direction of the arrow F in FIG. 10;

【符号の説明】[Explanation of symbols]

1 ラジアントチューブ 2 バーナ 3 レキュペレータ 4 布製ベローズ 5 フレキシブルチューブ 6 バーナサポート 7 バング側受け金物 8 転動体 9 バング 10 炉殻 11 ラジアントチューブサポート 12 連結管 13 金属ベローズ 14 短管 15 ストッパー 16 転動体保持枠 21 伸び 22 曲り DESCRIPTION OF SYMBOLS 1 Radiant tube 2 Burner 3 Recuperator 4 Cloth bellows 5 Flexible tube 6 Burner support 7 Bang side metal fittings 8 Rolling element 9 Bang 10 Furnace shell 11 Radiant tube support 12 Connecting pipe 13 Metal bellows 14 Short pipe 15 Stopper 16 Rolling element holding frame 21 Stretch 22 bends

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 バーナ又はレキュペレータ本体を熱処理
炉のラジアントチューブの炉殻突出し側で、回転体を介
して支え、バーナ又はレキュペレータ本体が炉壁を貫通
する部分を可撓性結合体で結合したことを特徴としたラ
ジアントチューブの炉殻突出し部の支持構造。
1. A burner or a recuperator main body is supported via a rotating body on a side of a radiant tube of a heat treatment furnace where a furnace shell protrudes, and a portion where the burner or the recuperator body penetrates a furnace wall is connected by a flexible coupling body. The support structure of the protruding part of the furnace shell of the radiant tube characterized by the following.
JP11041972A 1999-02-19 1999-02-19 Supporting structure of furnace shell protruding section of radiant tube Pending JP2000240904A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11041972A JP2000240904A (en) 1999-02-19 1999-02-19 Supporting structure of furnace shell protruding section of radiant tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11041972A JP2000240904A (en) 1999-02-19 1999-02-19 Supporting structure of furnace shell protruding section of radiant tube

Publications (1)

Publication Number Publication Date
JP2000240904A true JP2000240904A (en) 2000-09-08

Family

ID=12623122

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11041972A Pending JP2000240904A (en) 1999-02-19 1999-02-19 Supporting structure of furnace shell protruding section of radiant tube

Country Status (1)

Country Link
JP (1) JP2000240904A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011526352A (en) * 2008-07-04 2011-10-06 ベーエス−ベルメプロツェステクニーク ゲーエムベーハー Radiant heat arrangement with delay compensation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011526352A (en) * 2008-07-04 2011-10-06 ベーエス−ベルメプロツェステクニーク ゲーエムベーハー Radiant heat arrangement with delay compensation

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