WO2021166430A1 - Electric heater device and heat-treatment furnace provided with same - Google Patents
Electric heater device and heat-treatment furnace provided with same Download PDFInfo
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- WO2021166430A1 WO2021166430A1 PCT/JP2020/047999 JP2020047999W WO2021166430A1 WO 2021166430 A1 WO2021166430 A1 WO 2021166430A1 JP 2020047999 W JP2020047999 W JP 2020047999W WO 2021166430 A1 WO2021166430 A1 WO 2021166430A1
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- Prior art keywords
- electric heater
- furnace
- bar
- heater device
- side wall
- Prior art date
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 40
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000011449 brick Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
- F27D11/02—Ohmic resistance heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0036—Linings or walls comprising means for supporting electric resistances in the furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B5/00—Muffle furnaces; Retort furnaces; Other furnaces in which the charge is held completely isolated
- F27B5/06—Details, accessories, or equipment peculiar to furnaces of these types
- F27B5/14—Arrangements of heating devices
- F27B2005/143—Heating rods disposed in the chamber
Definitions
- the heat treatment furnace of one aspect of the present disclosure includes the electric heater device and the inner side wall of the furnace to which the electric heater device is attached.
- the installation work of the electric heater device can be easily performed.
- the electric heater device 10 is an electric heater device that indirectly heats the object to be heated 6 in the internal space S1 of the muffle 8.
- the electric heater device 10 is attached to the inner side wall 5 of the furnace in the outer space S2 of the muffle 8.
- the hook 16 in the first embodiment includes a main body portion 30, a shaft portion 32, and a ceramic insulator 34.
- the main body portion 30 is a portion that engages with the bar 12 and is suspended from the bar 12.
- the shaft portion 32 is a portion that is welded to the main body portion 30 after being passed through the hole of the insulator 34, and exhibits a ring shape together with the main body portion 30.
- the insulator 34 is provided with a groove, and the groove supports the upper end portion of the corrugated shape of the electric heater 18 from below.
- the electric heater 18 can be easily arranged in the ring of the hook 16 by passing the ring-shaped hooks 16 in order from the end of the electric heater 18.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Details (AREA)
- Resistance Heating (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
An electric heater device (10) which is attached to the inner side wall of a heat-treatment furnace comprises: a bar (12) in a rod shape; a bar support portion (14) for supporting the ends of the bar (12) on the inner side wall of the furnace; a plurality of hooks (16) that are suspended from the bar (12); and an electric heater (18) that is supported by being hooked on the plurality of hooks (16).
Description
本開示は、熱処理炉の炉内側壁に取り付けられる電熱ヒータ装置およびそれを備える熱処理炉に関する。
The present disclosure relates to an electric heater device attached to the inner wall wall of the heat treatment furnace and a heat treatment furnace including the electric heater device.
従来の電熱式熱処理炉では、特許文献１や特許文献２のように、波形に折り曲げたワイヤー状や平板状のヒータエレメントを炉内のハンガー（ピンやフック）に波形の上部を引っ掛けて吊り下げている。
In a conventional electric heat treatment furnace, as in Patent Document 1 and Patent Document 2, a wire-shaped or flat plate-shaped heater element bent into a corrugated shape is hung by hooking the upper part of the corrugated shape on a hanger (pin or hook) in the furnace. ing.
しかしながら、ヒータエレメントは熱変形するため、位置を固定するには全箇所吊り下げる必要がある。よって、大量のハンガーを炉内に取り付けたり、ヒータエレメントを吊り下げるのに大変手間がかかる。
However, since the heater element is thermally deformed, it is necessary to hang it in all places to fix the position. Therefore, it takes a lot of time and effort to install a large number of hangers in the furnace and to suspend the heater element.
また、炉体が円筒形のものもあるが、そこでも特許文献３のように炉内側壁の全周にヒータを吊り下げている。
In addition, although some furnace bodies have a cylindrical shape, a heater is suspended all around the inner wall wall of the furnace as in Patent Document 3.
また、ハンガーは通常、特許文献４や特許文献５のように、炉壁がセラミックファイバー製の場合はその間に差し込んで保持しているが、自重で落下する恐れがある。そこで、特許文献６のように、外郭から突き出した金属製の枠体に差し込むものもある。しかしながら、ハンガーを水平に差し込んでいるため、長年の使用によって抜けてくる恐れが残っている。
Also, as in Patent Document 4 and Patent Document 5, when the furnace wall is made of ceramic fiber, the hanger is usually inserted and held between them, but there is a risk of falling due to its own weight. Therefore, as in Patent Document 6, there is also one that is inserted into a metal frame protruding from the outer shell. However, since the hanger is inserted horizontally, there is still a risk that it will come off after many years of use.
本開示は、前記課題を解決するものであり、設置作業を容易に行うことができる電熱ヒータ装置およびそれを備える熱処理炉を提供することを目的とする。
The present disclosure is to solve the above-mentioned problems, and an object of the present disclosure is to provide an electric heater device capable of easily performing installation work and a heat treatment furnace provided with the electric heater device.
本開示の一態様の電熱ヒータ装置は、熱処理炉の炉内側壁に取り付けられる電熱ヒータ装置であって、バーと、前記バーの端部を前記炉内側壁で支持するためのバー支持部と、前記バーから吊り下げられた複数のフックと、前記複数のフックに引っ掛けて支持される電熱ヒータと、を備える。
The electric heater device of one aspect of the present disclosure is an electric heater device attached to the inner side wall of the heat treatment furnace, and includes a bar, a bar support portion for supporting an end portion of the bar by the inner side wall of the furnace, and a bar support portion. A plurality of hooks suspended from the bar and an electric heater supported by being hooked on the plurality of hooks are provided.
前記構成によれば、バーから吊り下げた複数のフックに電熱ヒータを引っ掛けた状態で熱処理炉内に搬入することで、バー支持部にバーを置くだけで電熱ヒータ装置を炉内側壁に取り付けることができる。そうすることにより、炉外でのヒータの組立作業と、炉内でのヒータの配置作業などを同時に進行することができ、工事期間を短くできる。また、高所作業となる炉内での作業時間が短縮できることは、危険作業のリスク低減にもつながる。
According to the above configuration, by carrying the electric heater into the heat treatment furnace with the electric heater hooked on a plurality of hooks suspended from the bar, the electric heater device can be attached to the inner side wall of the furnace simply by placing the bar on the bar support portion. Can be done. By doing so, the assembly work of the heater outside the furnace and the arrangement work of the heater inside the furnace can be carried out at the same time, and the construction period can be shortened. In addition, shortening the work time in the furnace, which is aerial work, leads to a reduction in the risk of dangerous work.
前記電熱ヒータ装置において、前記バー支持部は、前記炉内側壁の筒部に着脱可能であってもよい。前記構成によれば、バー支持部の交換や修理が容易である。
In the electric heater device, the bar support portion may be detachable from the tubular portion of the inner side wall of the furnace. According to the above configuration, the bar support portion can be easily replaced or repaired.
前記電熱ヒータ装置において、前記バー支持部は、前記筒部に配置された状態で水平方向よりも上方を向くようにして前記熱処理炉の内側に向かって突出してもよい。前記構成によれば、バー支持部が筒部から抜けにくくなる。
In the electric heater device, the bar support portion may project toward the inside of the heat treatment furnace so as to face upward from the horizontal direction while being arranged in the tubular portion. According to the above configuration, the bar support portion is less likely to come off from the cylinder portion.
前記電熱ヒータ装置において、前記バー支持部よりも下方の位置で前記炉内側壁から突出して前記電熱ヒータの端部が接続される電極をさらに備え、前記電熱ヒータは、前記バー支持部の上面に沿って引っ掛けられてから前記電極に向かって下方に延びるように配置されてもよい。前記構成によれば、電熱ヒータの端部を水平方向等に延ばして電極に接続する場合に比べて、端部部分に生じる応力を小さくすることができ、電熱ヒータの端部を電極に精度良く接続することができる。
The electric heater device further includes an electrode protruding from the inner side wall of the furnace at a position below the bar support and to which an end of the electric heater is connected, and the electric heater is mounted on the upper surface of the bar support. It may be arranged so as to be hooked along and then extend downward toward the electrode. According to the above configuration, the stress generated at the end portion can be reduced as compared with the case where the end portion of the electric heater is extended in the horizontal direction or the like and connected to the electrode, and the end portion of the electric heater can be accurately connected to the electrode. You can connect.
前記電熱ヒータ装置において、前記炉内側壁は平面視して矩形状であり、前記バーは直線状に延びる形状を有し、前記炉内側壁に沿って配置されてもよい。前記構成によれば、汎用的な部材のバーを用いることができる。
In the electric heater device, the inner side wall of the furnace has a rectangular shape in a plan view, the bar has a shape extending linearly, and may be arranged along the inner side wall of the furnace. According to the above configuration, a bar of a general-purpose member can be used.
前記電熱ヒータ装置において、前記炉内側壁は平面視して円形状であり、前記バーは円弧状に延びる形状を有し、前記炉内側壁に沿って配置されてもよい。前記構成によれば、炉内側壁が円形断面である場合も炉内側壁の形状に応じて電熱ヒータ装置を配置することができる。
In the electric heater device, the inner side wall of the furnace has a circular shape in a plan view, the bar has a shape extending in an arc shape, and may be arranged along the inner side wall of the furnace. According to the above configuration, even when the inner side wall of the furnace has a circular cross section, the electric heater device can be arranged according to the shape of the inner side wall of the furnace.
本開示の一態様の熱処理炉は、前記電熱ヒータ装置と、前記電熱ヒータ装置が取り付けられる前記炉内側壁と、を備える。
The heat treatment furnace of one aspect of the present disclosure includes the electric heater device and the inner side wall of the furnace to which the electric heater device is attached.
前記構成によれば、前記電熱ヒータ装置と同様の効果を奏することができる。
According to the above configuration, the same effect as that of the electric heater device can be obtained.
本開示によれば、電熱ヒータ装置の設置作業を容易に行うことができる。
According to the present disclosure, the installation work of the electric heater device can be easily performed.
以下、本開示に係る電熱ヒータ装置およびそれを備える熱処理炉の好適な実施形態について、添付の図面を参照しながら説明する。本開示は、以下の実施形態の具体的な構成に限定されるものではなく、同様の技術的思想に基づく構成が本開示に含まれる。
Hereinafter, a preferred embodiment of the electric heater device according to the present disclosure and the heat treatment furnace provided with the electric heater device will be described with reference to the attached drawings. The present disclosure is not limited to the specific configuration of the following embodiments, and the present disclosure includes configurations based on the same technical idea.
（実施形態１）
図１は、実施形態１における熱処理炉２の概略構成を示す平面図である。 (Embodiment 1)
FIG. 1 is a plan view showing a schematic configuration of theheat treatment furnace 2 according to the first embodiment.
図１は、実施形態１における熱処理炉２の概略構成を示す平面図である。 (Embodiment 1)
FIG. 1 is a plan view showing a schematic configuration of the
熱処理炉２は、被加熱物６を内部に収容して加熱するための炉体である。実施形態１の熱処理炉２は、特に加熱手段として電熱ヒータを用いるとともに、被加熱物６をマッフル８に収容した状態でマッフル８の外側から間接加熱する。図１に示すように、熱処理炉２は、炉壁４と、被加熱物６を収容するマッフル８と、複数の電熱ヒータ装置１０とを備える。
The heat treatment furnace 2 is a furnace body for accommodating and heating the object to be heated 6 inside. The heat treatment furnace 2 of the first embodiment uses an electric heater as a heating means, and indirectly heats the object to be heated 6 from the outside of the muffle 8 in a state of being housed in the muffle 8. As shown in FIG. 1, the heat treatment furnace 2 includes a furnace wall 4, a muffle 8 for accommodating an object to be heated 6, and a plurality of electric heater devices 10.
炉壁４は、熱処理炉２の外郭を構成する部材である。炉壁４は、レンガやセラミックスファイバー製のボードなどの断熱材で構成される。炉壁４の内側の側面は、炉内側壁５である。実施形態１における炉内側壁５は平面視して矩形状に形成される。
The furnace wall 4 is a member constituting the outer shell of the heat treatment furnace 2. The furnace wall 4 is made of a heat insulating material such as a board made of brick or ceramic fiber. The inner side surface of the furnace wall 4 is a furnace inner side wall 5. The inner side wall 5 of the furnace in the first embodiment is formed in a rectangular shape in a plan view.
マッフル８は、被加熱物６を収容する部材である。被加熱物６は例えば鋼帯であり、紙面に対して垂直な方向に搬送される。実施形態１におけるマッフル８は円筒状である。
The muffle 8 is a member that houses the object to be heated 6. The object to be heated 6 is, for example, a steel strip, and is conveyed in a direction perpendicular to the paper surface. The muffle 8 in the first embodiment has a cylindrical shape.
マッフル８の内部空間Ｓ１は、マッフル８の外部空間Ｓ２、すなわちマッフル８と炉内側壁５で囲まれる空間に対して密閉されている。マッフル８の外部空間Ｓ２は大気に開放されるのに対して、マッフル８の内部空間Ｓ１は大気と異なるガス（例えば窒素）が充填される。マッフル８の内部空間Ｓ１は、外部空間Ｓ２から大気が流入しないように陽圧状態とされる。
The internal space S1 of the muffle 8 is sealed with respect to the external space S2 of the muffle 8, that is, the space surrounded by the muffle 8 and the inner side wall 5 of the furnace. The exterior space S2 of the muffle 8 is open to the atmosphere, while the interior space S1 of the muffle 8 is filled with a gas (for example, nitrogen) different from that of the atmosphere. The internal space S1 of the muffle 8 is in a positive pressure state so that the atmosphere does not flow in from the external space S2.
電熱ヒータ装置１０は、マッフル８の内部空間Ｓ１にある被加熱物６を間接加熱する電熱式のヒータ装置である。電熱ヒータ装置１０は、マッフル８の外部空間Ｓ２において炉内側壁５に取り付けられている。
The electric heater device 10 is an electric heater device that indirectly heats the object to be heated 6 in the internal space S1 of the muffle 8. The electric heater device 10 is attached to the inner side wall 5 of the furnace in the outer space S2 of the muffle 8.
実施形態１における電熱ヒータ装置１０は、炉内側壁５の各面に対して設けられ、図８に示すように上下の炉長方向に多数段並べられている。電熱ヒータ装置１０のそれぞれは同一の構成を有する。
The electric heater devices 10 in the first embodiment are provided on each surface of the inner side wall 5 of the furnace, and are arranged in a large number of stages in the upper and lower furnace length directions as shown in FIG. Each of the electric heater devices 10 has the same configuration.
電熱ヒータ装置１０の詳細な構成について、図２～図６を用いて説明する。図２は、図１の一部拡大図であり、電熱ヒータ装置１０およびその周辺を示す平面図である。図３は、電熱ヒータ装置１０の斜視図であり、図４は、電熱ヒータ装置１０の正面図である。図５は、電熱ヒータ装置１０のバー支持部１４およびその周辺を示す縦断面図であり、図６は、電熱ヒータ装置１０のフック１６およびその周辺を示す縦断面図である。
The detailed configuration of the electric heater device 10 will be described with reference to FIGS. 2 to 6. FIG. 2 is a partially enlarged view of FIG. 1, and is a plan view showing the electric heater device 10 and its surroundings. FIG. 3 is a perspective view of the electric heater device 10, and FIG. 4 is a front view of the electric heater device 10. FIG. 5 is a vertical cross-sectional view showing the bar support portion 14 of the electric heater device 10 and its periphery, and FIG. 6 is a vertical cross-sectional view showing the hook 16 of the electric heater device 10 and its periphery.
図２～図４に示すように、電熱ヒータ装置１０は、バー１２と、バー支持部１４（図２、図４）と、複数のフック１６と、電熱ヒータ１８とを備える。
As shown in FIGS. 2 to 4, the electric heater device 10 includes a bar 12, a bar support portion 14 (FIGS. 2 and 4), a plurality of hooks 16, and an electric heater 18.
バー１２は、棒状の部材である。バー１２は断面円形の棒状に限らず、断面矩形の平板状など任意の形状であってもよい。実施形態１におけるバー１２は一直線状に延びるとともに、中空の円筒形状を有する。バー１２の材質は、セラミックスなどの絶縁性材料である。バー１２はバー支持部１４により支持される。
The bar 12 is a rod-shaped member. The bar 12 is not limited to a rod shape having a circular cross section, and may have an arbitrary shape such as a flat plate shape having a rectangular cross section. The bar 12 in the first embodiment extends in a straight line and has a hollow cylindrical shape. The material of the bar 12 is an insulating material such as ceramics. The bar 12 is supported by the bar support portion 14.
バー支持部１４は、バー１２を炉内側壁５にて支持するための部材である。バー支持部１４は、バー１２の両端部を支持するように２つ設けられている。バー支持部１４の材質は、レンガなどの絶縁性部材である。
The bar support portion 14 is a member for supporting the bar 12 on the inner side wall 5 of the furnace. Two bar support portions 14 are provided so as to support both end portions of the bar 12. The material of the bar support portion 14 is an insulating member such as brick.
バー支持部１４は、炉内側壁５に設けられた筒部２０に対して着脱可能である。筒部２０は、炉内側壁５に三角プレート２１（図２）で補強されて溶接されている。図２、図５では、バー支持部１４が炉内側壁５の筒部２０に挿入された状態が示される。
The bar support portion 14 is removable from the tubular portion 20 provided on the inner side wall 5 of the furnace. The tubular portion 20 is reinforced and welded to the inner side wall 5 of the furnace with a triangular plate 21 (FIG. 2). 2 and 5 show a state in which the bar support portion 14 is inserted into the tubular portion 20 of the inner side wall 5 of the furnace.
図５に示すように、バー支持部１４は、筒部２０に挿入された状態で熱処理炉２の内部空間に向かってＡ方向に延びる。バー支持部１４が延びるＡ方向は、水平方向Ｈに対して角度θだけ上方を向いている。角度θは鋭角である。
As shown in FIG. 5, the bar support portion 14 extends in the A direction toward the internal space of the heat treatment furnace 2 in a state of being inserted into the tubular portion 20. The direction A in which the bar support portion 14 extends is directed upward by an angle θ with respect to the horizontal direction H. The angle θ is an acute angle.
バー支持部１４はその先端部に凹部１５を有する。凹部１５はバー１２を受ける部分であり、バー支持部１４の上面に形成される。バー支持部１４の凹部１５にバー１２の両端部が配置され、バー１２がバー支持部１４によって支持される。
The bar support portion 14 has a recess 15 at its tip. The recess 15 is a portion that receives the bar 12 and is formed on the upper surface of the bar support portion 14. Both ends of the bar 12 are arranged in the recess 15 of the bar support portion 14, and the bar 12 is supported by the bar support portion 14.
図２～図４に戻ると、フック１６は、バー１２から吊り下げられるとともに電熱ヒータ１８を引っ掛けて支持するための部材である。電熱ヒータ１８の波形形状に応じて、複数のフック１６が設けられている。実施形態１におけるフック１６はリング状であり、バー１２がフック１６の輪の中に通されている。フック１６の形状はリング状に限らず、Ｓ字形状など、バー１２から吊り下げられて電熱ヒータ１８を支持可能であれば他の形状であってもよい。
Returning to FIGS. 2 to 4, the hook 16 is a member for being suspended from the bar 12 and for hooking and supporting the electric heater 18. A plurality of hooks 16 are provided according to the corrugated shape of the electric heater 18. The hook 16 in the first embodiment has a ring shape, and the bar 12 is passed through the loop of the hook 16. The shape of the hook 16 is not limited to the ring shape, and may be another shape such as an S shape as long as it can be suspended from the bar 12 and can support the electric heater 18.
図６に示すように、実施形態１におけるフック１６は、本体部３０と、軸部３２と、セラミックス製の碍子３４とを備える。本体部３０は、バー１２に係合してバー１２から吊り下げられる部分である。軸部３２は、碍子３４の穴に通した後、本体部３０に溶接される部分であり、本体部３０とともにリング状の形状を呈する。碍子３４には、溝が設けられており、その溝で電熱ヒータ１８の波形形状の上端部を下方から支持する。
As shown in FIG. 6, the hook 16 in the first embodiment includes a main body portion 30, a shaft portion 32, and a ceramic insulator 34. The main body portion 30 is a portion that engages with the bar 12 and is suspended from the bar 12. The shaft portion 32 is a portion that is welded to the main body portion 30 after being passed through the hole of the insulator 34, and exhibits a ring shape together with the main body portion 30. The insulator 34 is provided with a groove, and the groove supports the upper end portion of the corrugated shape of the electric heater 18 from below.
電熱ヒータ１８の端からリング状のフック１６を順番にくぐらせていくことで、フック１６の輪の中に電熱ヒータ１８を容易に配置することができる。
The electric heater 18 can be easily arranged in the ring of the hook 16 by passing the ring-shaped hooks 16 in order from the end of the electric heater 18.
電熱ヒータ１８は、被加熱物６を加熱するための電熱式のヒータである。実施形態１における電熱ヒータ１８は電熱線であり、金属製の棒状（針金状）である（例えばニクロム線）。図３、図４に示すように、電熱ヒータ１８は波形の形状を有し、折り返し部分である上端部のそれぞれがフック１６に引っ掛けられている。電熱ヒータ１８は棒状のものに限らず、平らなリボン状のものであってもよい。
The electric heater 18 is an electric heater for heating the object 6 to be heated. The electric heater 18 in the first embodiment is a heating wire, and has a metal rod shape (wire shape) (for example, a nichrome wire). As shown in FIGS. 3 and 4, the electric heater 18 has a corrugated shape, and each of the upper end portions, which are folded portions, is hooked on the hook 16. The electric heater 18 is not limited to a rod shape, but may be a flat ribbon shape.
図４、図５に示すように、電熱ヒータ１８の両端部は電極２２に接続（例えば溶接）されている。電極２２は、電熱ヒータ１８に通電するための金属部材であり、熱処理炉２の外部から炉壁４を通じて熱処理炉２の内部に突出する。電極２２は、バー支持部１４が配置される筒部２０よりも下方に配置される。
As shown in FIGS. 4 and 5, both ends of the electric heater 18 are connected (for example, welded) to the electrodes 22. The electrode 22 is a metal member for energizing the electric heater 18, and projects from the outside of the heat treatment furnace 2 to the inside of the heat treatment furnace 2 through the furnace wall 4. The electrode 22 is arranged below the tubular portion 20 in which the bar support portion 14 is arranged.
図４、図５に示すように、電熱ヒータ１８の両端部は、バー支持部１４の上面に引っ掛けてから下方に延びるように配置され、電極２２に接続される。このような配置によれば、電熱ヒータ１８の両端部を水平方向に延ばして電極２２に接続する場合に比べて、電熱ヒータ１８の両端部にかかる応力が小さくなる。なお、電熱ヒータ１８の両端部は、バー支持部１４の先端に巻かれてもよい。
As shown in FIGS. 4 and 5, both ends of the electric heater 18 are arranged so as to be hooked on the upper surface of the bar support portion 14 and then extend downward, and are connected to the electrodes 22. According to such an arrangement, the stress applied to both ends of the electric heater 18 is smaller than that in the case where both ends of the electric heater 18 are extended in the horizontal direction and connected to the electrode 22. Both ends of the electric heater 18 may be wound around the tip of the bar support portion 14.
上述したように、実施形態１の電熱ヒータ装置１０は、熱処理炉２の炉内側壁５に取り付けられる装置であって、バー１２と、バー１２の端部を炉内側壁５で支持するためのバー支持部１４と、バー１２から吊り下げられた複数のフック１６と、複数のフック１６に引っ掛けて支持される電熱ヒータ１８とを備える。
As described above, the electric heater device 10 of the first embodiment is a device attached to the inner side wall 5 of the heat treatment furnace 2 for supporting the bar 12 and the end portion of the bar 12 by the inner side wall 5 of the furnace. A bar support portion 14, a plurality of hooks 16 suspended from the bar 12, and an electric heater 18 hooked on and supported by the plurality of hooks 16 are provided.
このような構成によれば、バー１２から吊り下げた複数のフック１６に電熱ヒータ１８を引っ掛けた状態で熱処理炉２に搬入することで、バー支持部１４にバー１２を置くだけで電熱ヒータ装置１０を炉内側壁５に取り付けることができる。そうすることにより、炉外での電熱ヒータ装置１０の組立作業と、炉内での電熱ヒータ装置１０の配置作業などを同時に進行することができ、工事期間を短くできる。また、高所作業となる炉内での作業時間が短縮できることは、危険作業のリスク低減にもつながる。このようにして、電熱ヒータ装置１０の設置作業を容易に行うことができる。また、電熱ヒータ１８を複数のフック１６を介してバー１２に支持させることで、電熱ヒータ１８の熱がバー１２に直接伝わららないため、バー１２の熱損傷を抑制することができる。これにより、バー１２および電熱ヒータ装置１０の耐熱寿命を延ばすことができる。
According to such a configuration, the electric heater 18 is carried into the heat treatment furnace 2 in a state where the electric heater 18 is hooked on a plurality of hooks 16 suspended from the bar 12, and the electric heater device is simply placed on the bar support portion 14. 10 can be attached to the inner side wall 5 of the furnace. By doing so, the assembly work of the electric heater device 10 outside the furnace and the arrangement work of the electric heater device 10 inside the furnace can be carried out at the same time, and the construction period can be shortened. In addition, shortening the work time in the furnace, which is aerial work, leads to a reduction in the risk of dangerous work. In this way, the installation work of the electric heater device 10 can be easily performed. Further, by supporting the electric heater 18 to the bar 12 via the plurality of hooks 16, the heat of the electric heater 18 is not directly transferred to the bar 12, so that the thermal damage of the bar 12 can be suppressed. As a result, the heat resistant life of the bar 12 and the electric heater device 10 can be extended.
また、実施形態１の電熱ヒータ装置１０によれば、バー支持部１４は、炉内側壁５の筒部２０に着脱可能である。このような構成によれば、バー支持部１４の交換や修理が容易になる。
Further, according to the electric heater device 10 of the first embodiment, the bar support portion 14 can be attached to and detached from the tubular portion 20 of the inner side wall 5 of the furnace. With such a configuration, the bar support portion 14 can be easily replaced or repaired.
また、実施形態１の電熱ヒータ装置１０によれば、バー支持部１４は、筒部２０に配置された状態で水平方向Ｈよりも上方を向くようにして熱処理炉２の内側に向かって突出する。このような構成によれば、バー支持部１４を筒部２０から抜けにくくすることができる。
Further, according to the electric heater device 10 of the first embodiment, the bar support portion 14 projects toward the inside of the heat treatment furnace 2 so as to face upward in the horizontal direction H in a state of being arranged in the tubular portion 20. .. According to such a configuration, the bar support portion 14 can be made difficult to come off from the tubular portion 20.
また、実施形態１の電熱ヒータ装置１０は、バー支持部１４よりも下方の位置で炉内側壁５から突出して電熱ヒータ１８の端部が接続される電極２２をさらに備える。電熱ヒータ１８は、バー支持部１４の上面に沿って引っ掛けてから電極２２に向かって下方に延びるように配置される。このような構成によれば、電熱ヒータ１８の端部部分を水平方向に延ばして電極２２に接続する場合に比べて、端部部分に生じる応力を小さくすることができ、端部部分の変形や損傷を抑制することができる。これにより、電熱ヒータ１８を電極２２に精度良く接続することができる。
Further, the electric heater device 10 of the first embodiment further includes an electrode 22 that protrudes from the inner side wall 5 of the furnace at a position below the bar support portion 14 and to which the end portion of the electric heater 18 is connected. The electric heater 18 is arranged so as to be hooked along the upper surface of the bar support portion 14 and then extend downward toward the electrode 22. According to such a configuration, the stress generated at the end portion can be reduced as compared with the case where the end portion of the electric heater 18 is extended in the horizontal direction and connected to the electrode 22, and the end portion is deformed. Damage can be suppressed. As a result, the electric heater 18 can be accurately connected to the electrode 22.
また、実施形態１の電熱ヒータ装置１０によれば、炉内側壁５は平面視して矩形状であり、バー１２は直線状に延びる形状を有し、直線状の炉内側壁５に沿って配置される。このような構成によれば、汎用的な部材のバー１２を用いることができ、電熱ヒータ装置１０の製造コストを低減することができる。
Further, according to the electric heater device 10 of the first embodiment, the inner side wall 5 of the furnace has a rectangular shape in a plan view, and the bar 12 has a shape extending linearly along the linear inner side wall 5 of the furnace. Be placed. According to such a configuration, the bar 12 of a general-purpose member can be used, and the manufacturing cost of the electric heater device 10 can be reduced.
また、実施の形態１の熱処理炉２は、上述した電熱ヒータ装置１０と、電熱ヒータ装置１０が取り付けられる炉内側壁５とを備える。このような構成によれば、上述した電熱ヒータ装置１０と同様の効果を奏することができる。
Further, the heat treatment furnace 2 of the first embodiment includes the above-mentioned electric heater device 10 and a furnace inner side wall 5 to which the electric heater device 10 is attached. According to such a configuration, the same effect as that of the electric heater device 10 described above can be obtained.
以上、上述の実施形態１を挙げて本開示の発明を説明したが、本開示の発明は上述の実施形態１に限定されない。例えば、上記実施形態１では、バー１２を支持するバー支持部１４が炉内側壁５の筒部２０に着脱可能である場合について説明したが、このような場合に限らない。例えば、図７に示す熱処理炉１００のように、炉壁１０２に貫通孔１０４を設け、電熱ヒータ装置１０６のバー１０８を貫通孔１０４に挿通することで、電熱ヒータ装置１０６を炉壁１０２に取り付けるようにしてもよい。このような構成によれば、実施形態１のようなバー支持部１４を省略しながら、電熱ヒータ装置１０６を炉壁１０２に支持させることができ、構成を簡素化することができる。なお、図７に示す変形例では、炉壁１０２に設けた貫通孔１０４が「バー支持部」として機能する。貫通孔１０４とバー１０８の隙間は別途、断熱材を詰める等して、塞がれる。
Although the invention of the present disclosure has been described above with reference to the above-described first embodiment, the invention of the present disclosure is not limited to the above-mentioned embodiment 1. For example, in the first embodiment, the case where the bar support portion 14 that supports the bar 12 can be attached to and detached from the tubular portion 20 of the inner side wall 5 of the furnace has been described, but the case is not limited to such a case. For example, as in the heat treatment furnace 100 shown in FIG. 7, the electric heater device 106 is attached to the furnace wall 102 by providing a through hole 104 in the furnace wall 102 and inserting the bar 108 of the electric heater device 106 into the through hole 104. You may do so. According to such a configuration, the electric heater device 106 can be supported by the furnace wall 102 while omitting the bar support portion 14 as in the first embodiment, and the configuration can be simplified. In the modified example shown in FIG. 7, the through hole 104 provided in the furnace wall 102 functions as a “bar support portion”. The gap between the through hole 104 and the bar 108 is closed by separately filling a heat insulating material or the like.
また、上記実施形態１では、炉内側壁５が平面視して矩形状である場合について説明したが、このような場合に限らず、図９に示すように例えば円形状であってもよい。この場合、直線状のバー１２に代えて、緩やかな湾曲形状のバーを用いればよい。図９に示す熱処理炉２００は、炉壁２０４が円弧状に形成されており、炉内側壁２０５の断面形状が円形である。電熱ヒータ装置２１０のバー２１２は円弧状に延びており、炉内側壁２０５に沿って配置される。バー２１２は、第１バー支持部２１４Ａおよび第２バー支持部２１４Ｂによって支持される。第１バー支持部２１４Ａは、２つのバー２１２の近接する両端部を支持するレンガサポートであり、第２バー支持部２１４Ｂは、１つのバー２１２の中間部を支持するレンガサポートである。第１バー支持部２１４Ａを２つのバー２１２に兼用して使用することで効率的な構成とすることができる。また、第１バー支持部２１４Ａに加えて第２バー支持部２１４Ｂを設けることで、第１バー支持部２１４Ａのみでバー２１２の両端部を支持する構成に比べて、バー２１２の回転を規制しながらバー２１２を支持することができ、安定的に支持できる。
Further, in the first embodiment, the case where the inner side wall 5 of the furnace has a rectangular shape in a plan view has been described, but the case is not limited to such a case, and may be, for example, a circular shape as shown in FIG. In this case, instead of the straight bar 12, a gently curved bar may be used. In the heat treatment furnace 200 shown in FIG. 9, the furnace wall 204 is formed in an arc shape, and the cross-sectional shape of the inner side wall 205 of the furnace is circular. The bar 212 of the electric heater device 210 extends in an arc shape and is arranged along the inner side wall 205 of the furnace. The bar 212 is supported by the first bar support portion 214A and the second bar support portion 214B. The first bar support portion 214A is a brick support that supports the adjacent both ends of the two bars 212, and the second bar support portion 214B is a brick support that supports the intermediate portion of the one bar 212. An efficient configuration can be obtained by using the first bar support portion 214A in combination with the two bars 212. Further, by providing the second bar support portion 214B in addition to the first bar support portion 214A, the rotation of the bar 212 is restricted as compared with the configuration in which both ends of the bar 212 are supported only by the first bar support portion 214A. However, the bar 212 can be supported and can be stably supported.
なお、上記様々な実施形態のうちの任意の実施形態を適宜組み合わせることにより、それぞれの有する効果を奏するようにすることができる。
It should be noted that by appropriately combining any of the above-mentioned various embodiments, the effects of each can be achieved.
本開示は、添付図面を参照しながら好ましい実施形態に関連して充分に記載されているが、この技術の熟練した人々にとっては種々の変形や修正は明白である。そのような変形や修正は、添付した特許請求の範囲による本開示の範囲から外れない限りにおいて、その中に含まれると理解されるべきである。また、各実施形態における要素の組合せや順序の変化は、本開示の範囲及び思想を逸脱することなく実現し得るものである。
Although the present disclosure is fully described in relation to preferred embodiments with reference to the accompanying drawings, various modifications and modifications are obvious to those skilled in the art. It should be understood that such modifications and modifications are included within the scope of the present disclosure by the appended claims. In addition, changes in the combination and order of elements in each embodiment can be realized without departing from the scope and ideas of the present disclosure.
本開示は、熱処理炉の炉内側壁に取り付けられる電熱ヒータ装置およびそれを備える熱処理炉であれば適用可能である。
The present disclosure is applicable to any electric heater device attached to the inner wall wall of the heat treatment furnace and a heat treatment furnace including the electric heater device.
２ 熱処理炉
４ 炉壁
５ 炉内側壁
６ 被加熱物
８ マッフル
１０ 電熱ヒータ装置
１２ バー
１４ バー支持部
１５ 凹部
１６ フック
１８ 電熱ヒータ
２０ 筒部
２１ 三角プレート
２２ 電極
３０ 本体部
３２ 着脱部
３４ 支持部
１００ 熱処理炉
１０２ 炉壁
１０４ 貫通孔
１０６ 電熱ヒータ装置
１０８ バー
２００ 熱処理炉
２０４ 炉壁
２０５ 炉内側壁
２１０ 電熱ヒータ装置
２１２ バー
２１４Ａ 第１バー支持部
２１４Ｂ 第２バー支持部
Ｓ１ マッフルの内部空間
Ｓ２ マッフルの外部空間
Ａ バー支持部が延びる方向
Ｈ 水平方向
θ 角度 2Heat treatment furnace 4 Furnace wall 5 Furnace inner side wall 6 Heated object 8 Muffle 10 Electric heater device 12 bars 14 Bar support 15 Recess 16 Hook 18 Electric heater 20 Cylinder 21 Triangular plate 22 Electrode 30 Main body 32 Detachable part 34 Support 100 Heat treatment furnace 102 Furnace wall 104 Through hole 106 Electric heating heater device 108 bar 200 Heat treatment furnace 204 Furnace wall 205 Furnace inner side wall 210 Electric heating heater device 212 bar 214A 1st bar support 214B 2nd bar support S1 Muffle internal space S2 Muffle External space A Direction in which the bar support extends H Horizontal direction θ Angle
４ 炉壁
５ 炉内側壁
６ 被加熱物
８ マッフル
１０ 電熱ヒータ装置
１２ バー
１４ バー支持部
１５ 凹部
１６ フック
１８ 電熱ヒータ
２０ 筒部
２１ 三角プレート
２２ 電極
３０ 本体部
３２ 着脱部
３４ 支持部
１００ 熱処理炉
１０２ 炉壁
１０４ 貫通孔
１０６ 電熱ヒータ装置
１０８ バー
２００ 熱処理炉
２０４ 炉壁
２０５ 炉内側壁
２１０ 電熱ヒータ装置
２１２ バー
２１４Ａ 第１バー支持部
２１４Ｂ 第２バー支持部
Ｓ１ マッフルの内部空間
Ｓ２ マッフルの外部空間
Ａ バー支持部が延びる方向
Ｈ 水平方向
θ 角度 2
Claims (7)
- 熱処理炉の炉内側壁に取り付けられる電熱ヒータ装置であって、
バーと、
前記バーの端部を前記炉内側壁で支持するためのバー支持部と、
前記バーから吊り下げられた複数のフックと、
前記複数のフックに引っ掛けて支持される電熱ヒータと、を備える、電熱ヒータ装置。 An electric heater device attached to the inner side wall of a heat treatment furnace.
With the bar
A bar support portion for supporting the end portion of the bar by the inner side wall of the furnace, and a bar support portion.
With multiple hooks suspended from the bar,
An electric heater device including an electric heater that is hooked on and supported by the plurality of hooks. - 前記バー支持部は、前記炉内側壁の筒部に着脱可能である、請求項１に記載の電熱ヒータ装置。 The electric heater device according to claim 1, wherein the bar support portion is removable from the tubular portion of the inner side wall of the furnace.
- 前記バー支持部は、前記筒部に配置された状態で水平方向よりも上方を向くようにして前記熱処理炉の内側に向かって突出する、請求項２に記載の電熱ヒータ装置。 The electric heater device according to claim 2, wherein the bar support portion projects toward the inside of the heat treatment furnace so as to face upward from the horizontal direction while being arranged in the tubular portion.
- 前記バー支持部よりも下方の位置で前記炉内側壁から突出して前記電熱ヒータの端部が接続される電極をさらに備え、
前記電熱ヒータは、前記バー支持部の上面に沿って引っ掛けられてから前記電極に向かって下方に延びるように配置される、請求項１から３のいずれか１つに記載の電熱ヒータ装置。 Further provided with an electrode protruding from the inner side wall of the furnace at a position below the bar support and to which the end of the electric heater is connected.
The electric heater device according to any one of claims 1 to 3, wherein the electric heater is hooked along the upper surface of the bar support portion and then is arranged so as to extend downward toward the electrode. - 前記炉内側壁は平面視して矩形状であり、
前記バーは直線状に延びる形状を有し、前記炉内側壁に沿って配置される、請求項１から４のいずれか１つに記載の電熱ヒータ装置。 The inner side wall of the furnace is rectangular in plan view and has a rectangular shape.
The electric heater device according to any one of claims 1 to 4, wherein the bar has a shape extending linearly and is arranged along the inner side wall of the furnace. - 前記炉内側壁は平面視して円形状であり、
前記バーは円弧状に延びる形状を有し、前記炉内側壁に沿って配置される、請求項１から４のいずれか１つに記載の電熱ヒータ装置。 The inner side wall of the furnace has a circular shape in a plan view.
The electric heater device according to any one of claims 1 to 4, wherein the bar has a shape extending in an arc shape and is arranged along the inner side wall of the furnace. - 請求項１から６のいずれか１つに記載の前記電熱ヒータ装置と、
前記電熱ヒータ装置が取り付けられる前記炉内側壁と、を備える、熱処理炉。 The electric heater device according to any one of claims 1 to 6.
A heat treatment furnace comprising the inner side wall of the furnace to which the electric heater device is attached.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20920315.7A EP4109022A4 (en) | 2020-02-18 | 2020-12-22 | Electric heater device and heat-treatment furnace provided with same |
| CN202080096790.1A CN115135944A (en) | 2020-02-18 | 2020-12-22 | Electric heater device and heat treatment furnace comprising same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020025454A JP6795715B1 (en) | 2020-02-18 | 2020-02-18 | Electric heater device and heat treatment furnace equipped with it |
| JP2020-025454 | 2020-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2021166430A1 true WO2021166430A1 (en) | 2021-08-26 |
Family
ID=73544837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2020/047999 WO2021166430A1 (en) | 2020-02-18 | 2020-12-22 | Electric heater device and heat-treatment furnace provided with same |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4109022A4 (en) |
| JP (1) | JP6795715B1 (en) |
| CN (1) | CN115135944A (en) |
| TW (1) | TWI821622B (en) |
| WO (1) | WO2021166430A1 (en) |
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- 2020-02-18 JP JP2020025454A patent/JP6795715B1/en active Active
- 2020-12-22 WO PCT/JP2020/047999 patent/WO2021166430A1/en unknown
- 2020-12-22 EP EP20920315.7A patent/EP4109022A4/en active Pending
- 2020-12-22 CN CN202080096790.1A patent/CN115135944A/en active Pending
- 2020-12-25 TW TW109146166A patent/TWI821622B/en active
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|---|---|---|---|---|
| JPS53124337A (en) * | 1977-03-04 | 1978-10-30 | Sauder Industries | Electric heating unit supporting method and apparatus |
| JPS58160790A (en) * | 1982-03-08 | 1983-09-24 | ステンカ−・コ−ポレ−シヨン | Furnace insulated by ceramic fiber with hanger element for electric heating element |
| JPS6045367U (en) | 1983-09-07 | 1985-03-30 | 新日本製鐵株式会社 | Furnace wall structure of vertical continuous annealing furnace |
| JPS6056025A (en) | 1983-09-07 | 1985-04-01 | Nippon Steel Corp | Construction of wall of continuous annealing furnace |
| US4620309A (en) * | 1985-03-29 | 1986-10-28 | Ppg Industries, Inc. | Electric furnace construction |
| JPS62163895A (en) | 1986-01-14 | 1987-07-20 | Mitsubishi Heavy Ind Ltd | Double reversal propeller vessel having stern bulb |
| JPH06221770A (en) | 1993-01-22 | 1994-08-12 | Nippon Steel Corp | Block of fibrous refractory |
| JP2005282928A (en) | 2004-03-29 | 2005-10-13 | Nippon Steel Corp | Fibrous refractory block for continuous annealing furnace |
| JP2009250548A (en) | 2008-04-08 | 2009-10-29 | Alpha Oikos:Kk | Heating furnace for high temperature |
Non-Patent Citations (1)
| Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2021131171A (en) | 2021-09-09 |
| EP4109022A1 (en) | 2022-12-28 |
| TW202132741A (en) | 2021-09-01 |
| CN115135944A (en) | 2022-09-30 |
| EP4109022A4 (en) | 2024-02-21 |
| JP6795715B1 (en) | 2020-12-02 |
| TWI821622B (en) | 2023-11-11 |
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