JP6789199B2 - Rotary heat treatment furnace - Google Patents
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Description
本発明は、熱風を循環させてアルミニウム合金などの被加熱物に熱処理を施す回転式熱処理炉に関するものである。 The present invention relates to a rotary heat treatment furnace in which hot air is circulated to heat an object to be heated such as an aluminum alloy.
従来、例えば、アルミニウム合金等の被加熱物に熱処理を施すために、熱風循環式や多段型炉床回転式を組み合わせた回転式熱処理炉が知られている（例えば、特許文献１参照）。 Conventionally, for example, in order to heat-treat an object to be heated such as an aluminum alloy, a rotary heat treatment furnace that combines a hot air circulation type and a multi-stage hearth rotary type is known (see, for example, Patent Document 1).
この回転式熱処理炉２０は、図７に示すように、中央部上方に設けられたファン２４により一旦熱風を炉底まで送り、最も下方に位置する格納室２２ａに熱風を入れ、その熱風を最も上方に位置する格納室２２ａまで順に送るものである。そして、その熱風は再びファン２４により炉底まで送られる。
また、内筒には仕切り２１が設けられ、その仕切り２１によって加熱ゾーンと均熱ゾーンに分離され、加熱ゾーンでは、すばやく昇温するために大量の熱量投入と高速の熱風の循環が行われ、均熱ゾーンでは、熱量的には飽和した状態で一定の温度に維持する熱風の循環が行われる。
In this rotary heat treatment furnace 20, as shown in FIG. 7, hot air is once sent to the bottom of the furnace by a fan 24 provided above the central portion, and hot air is introduced into the storage chamber 22a located at the lowermost position, and the hot air is blown to the maximum. It is sent in order to the storage chamber 22a located above. Then, the hot air is sent to the bottom of the furnace again by the fan 24.
Further, a partition 21 is provided in the inner cylinder, and the partition 21 separates the heating zone and the soaking zone. In the heating zone, a large amount of heat is input and high-speed hot air is circulated in order to raise the temperature quickly. In the heat equalization zone, hot air is circulated to maintain a constant temperature in a saturated state in terms of calorific value.
しかしながら、特許文献１に記載された発明では中央部の上方に設けられた一台のファン２４によって加熱ゾーンと均熱ゾーンの両方に熱風を循環させているため、ファン２４の容量は大きくその分、炉本体の高さが高くなってしまう。
したがって、炉本体の大きさによっては、生産工場から納品場所まで輸送するためには炉本体を分割構造としなければ輸送できないという問題がある。
However, in the invention described in Patent Document 1, since hot air is circulated in both the heating zone and the soaking zone by one fan 24 provided above the central portion, the capacity of the fan 24 is large by that amount. , The height of the furnace body becomes high.
Therefore, depending on the size of the furnace body, there is a problem that the furnace body cannot be transported from the production factory to the delivery place unless the furnace body has a divided structure.
また、被加熱物を加熱して昇温させる加熱帯（加熱ゾーン）は、昇温した状態を保つ均熱帯（均熱ゾーン）よりも多くの熱量、すなわち大きな風量と風速を必要とし、ファン２４から吐出される熱風を均熱ゾーンよりも加熱ゾーンに多く分配するものであるが、一台のファン２４だけであると、熱風を分配するための構造と温度制御が複雑になってしまうといった問題があった。 Further, the heating zone (heating zone) for heating the object to be heated to raise the temperature requires a larger amount of heat, that is, a larger air volume and wind speed than the soaking tropics (soaking zone) for maintaining the heated state, and the fan 24 The hot air discharged from the fan is distributed more to the heating zone than to the soaking zone, but if only one fan 24 is used, the structure and temperature control for distributing the hot air become complicated. was there.
そこで、本発明の目的とするところは、構造及び温度制御が簡単でファンの容量も抑制可能な回転式熱処理炉を提供することにある。 Therefore, an object of the present invention is to provide a rotary heat treatment furnace having a simple structure and temperature control and capable of suppressing the capacity of a fan.
上記の目的を達成するために、本発明の回転式熱処理炉（３０）は、内側が第一ゾーン（Ｐ）と第二ゾーン（Ｑ）に分断された炉本体（３１）と、
径方向に延びる側壁（３２ｃ）で仕切られた格納室（３２ａ）が周方向に複数かつ多段状に形成されるとともに中央部には空隙（３２ｂ）が形成されてなる平面視ドーナツ状で、前記第一ゾーン（Ｐ）と前記第二ゾーン（Ｑ）を跨ぐように設置されしかも回転自在に支持される格納回転体（３２）と、
前記格納回転体（３２）を回転させる回転駆動装置（３３）と、
前記格納回転体（３２）に非接触状態で前記格納回転体（３２）の中央部に形成された空隙（３２ｂ）に固定された竪型円筒状で、その周側面の平面視左周側面に前記格納室（３２ａ）に連通した開口部（３４Ａ）が設けられるとともに平面視右周側面は閉状態にされたと内筒部（３４）と、
前記内筒部（３４）の右周側面における周方向一方端部に相対向する、前記炉本体（３１）の壁面の位置から前記格納回転体（３２）まで延びる第一仕切壁（３５）と、
前記内筒部（３４）の右周側面における周方向他方端部に相対向する、前記炉本体（３１）の壁面の位置から前記格納回転体（３２）まで延びる第二仕切壁（３６）と、
前記内筒部（３４）の右周側面と前記炉本体（３１）の壁面の間に、前記内筒部（３４）の右周側面の形状に沿って立設された曲面状のダクト内壁（３７Ａ）を有し、その前記内筒部（３４）側に吹出口（Ｅ）と吸込口（Ｆ）が互いに離れた位置に形成された循環ダクト（３７）と、
前記第一ゾーン（Ｐ）に加熱器（Ｈ）で温められた熱風を送る、前記内筒部（３４）の上部に設けられた第一ファン（３８）と、
前記第二ゾーン（Ｑ）に風を送る、前記第一ファン（３８）とは独立した第二ファン（３９）を備え、
前記第一ゾーン（Ｐ）は、前記第一仕切壁（３５）及び前記第二仕切壁（３６）の左側に位置し、前記第二ゾーン（Ｑ）は、前記第一仕切壁（３５）及び前記第二仕切壁（３６）の右側に位置するもので、
前記第一仕切壁（３５）の前記格納回転体（３２）側の部位が前記側壁（３２ｃ）の一つと近接するときに、前記第二仕切壁（３６）の前記格納回転体（３２）側の部位が前記側壁（３２ｃ）の他の一つと近接し、
前記第一ファン（３８）からの熱風を、前記内筒部（３４）内に下降させ前記開口部（３４Ａ）から、前記第一ゾーン（Ｐ）に位置する前記格納室（３２ａ）の外周側に向けて水平に送り、前記炉本体（３１）の壁面に沿って上昇させて前記第一ファン（３８）まで戻すように循環させるとともに、
前記第二ファン（３９）からの熱風を、前記循環ダクト（３７）内を周方向外向きに送り前記吹出口（Ｅ）から吐出し、前記第二ゾーン（Ｑ）に位置する前記格納室（３２ａ）の外周側に沿って周方向内向きに送り前記吸込口（Ｆ）から前記第二ファン（３９）まで戻すように循環させたことを特徴とする。
In order to achieve the above object, the rotary heat treatment furnace (30) of the present invention has a furnace body (31) whose inside is divided into a first zone (P) and a second zone (Q).
A donut shape in a plan view in which a plurality of storage chambers (32a) partitioned by a side wall (32c) extending in the radial direction are formed in a plurality of stages in the circumferential direction and a gap (32b) is formed in the central portion. A retractable rotating body (32) installed so as to straddle the first zone (P) and the second zone (Q) and supported rotatably.
A rotary drive device (33) for rotating the retractable rotating body (32) and
A vertical cylindrical shape fixed to a gap (32b) formed in the central portion of the storage rotating body (32) in a non-contact state with the storage rotating body (32) , and on the left peripheral side surface in a plan view of the peripheral side surface thereof. An opening (34A) communicating with the storage chamber (32a) was provided, and the right peripheral side surface in a plan view was closed.
With the first partition wall (35) extending from the position of the wall surface of the furnace body (31) to the retractable rotating body (32) facing one end in the circumferential direction on the right peripheral side surface of the inner cylinder portion (34). ,
With the second partition wall (36) extending from the position of the wall surface of the furnace body (31) to the retractable rotating body (32) facing the other end in the circumferential direction on the right peripheral side surface of the inner cylinder portion (34). ,
A curved duct inner wall (a curved duct inner wall) erected between the right peripheral side surface of the inner cylinder portion (34) and the wall surface of the furnace body (31) along the shape of the right peripheral side surface of the inner cylinder portion (34). A circulation duct (37) having 37A) and having an air outlet (E) and a suction port (F) formed at positions separated from each other on the inner cylinder portion (34) side.
A first fan (38) provided in the upper part of the inner cylinder portion (34) that sends hot air warmed by a heater (H) to the first zone (P), and
A second fan (39) independent of the first fan (38), which sends wind to the second zone (Q), is provided.
The first zone (P) is located on the left side of the first partition wall (35) and the second partition wall (36), and the second zone (Q) is the first partition wall (35) and It is located on the right side of the second partition wall (36).
When the portion of the first partition wall (35) on the storage rotating body (32) side is close to one of the side walls (32c), the storage rotating body (32) side of the second partition wall (36). Site is in close proximity to the other one of the side walls (32c)
Hot air from the first fan (38) is lowered into the inner cylinder portion (34), and from the opening (34A), the outer peripheral side of the storage chamber (32a) located in the first zone (P). It is fed horizontally toward the above, raised along the wall surface of the furnace body (31), and circulated so as to return to the first fan (38).
The hot air from the second fan (39) is sent outward in the circumferential direction in the circulation duct (37) and discharged from the outlet (E), and the storage chamber (Q) located in the second zone (Q). It is characterized in that it is circulated so as to be fed inward in the circumferential direction along the outer peripheral side of 32a) and returned from the suction port (F) to the second fan (39).
また、本発明は、前記循環ダクト（３７）の吸込口（Ｆ）は、前記循環ダクト（３７）の中央部に形成されるとともに、前記吹出口（Ｅ）は、前記循環ダクト（３７）の周方向の両端部の前記内筒部（３４）側に形成され、
前記第二ファン（３９）は、前記循環ダクト（３７）に形成された吸込口（Ｆ）に相対向する前記炉本体（３１）の壁面近傍に設けられ、
前記第二ファン（３９）からの熱風を、前記循環ダクト（３７）の中央部から周方向外向きに送り前記吹出口（Ｅ）から吐出し、前記第二ゾーン（Ｑ）に位置する前記格納室（３２ａ）の外周側に沿って周方向内きに送り前記循環ダクト（３７）の吸込口（Ｆ）から前記第二ファン（３９）まで戻すようにしたことを特徴とする。
Further, in the present invention, the suction port (F) of the circulation duct (37) is formed in the central portion of the circulation duct (37), and the outlet (E) is the circulation duct (37). It is formed on the inner cylinder portion (34) side of both ends in the circumferential direction.
The second fan (39) is provided near the wall surface of the furnace body (31) facing the suction port (F) formed in the circulation duct (37).
The hot air from the second fan (39) is sent outward from the central portion of the circulation duct (37) in the circumferential direction and discharged from the outlet (E), and the storage located in the second zone (Q). It is characterized in that it is fed inward in the circumferential direction along the outer peripheral side of the chamber (32a) and returned from the suction port (F) of the circulation duct (37) to the second fan (39).
また、本発明は、前記循環ダクト（３７）は、前記吸込口（Ｆ）が形成された位置の高さ（Ｓ）に比較して、前記吹出口（Ｅ）が形成された位置の高さ（Ｔ）を大きくするようにしたことを特徴とする。 Further, in the present invention, the circulation duct (37) has a height at a position where the air outlet (E) is formed as compared with a height (S) at a position where the suction port (F) is formed. It is characterized in that (T) is increased.
また、本発明は、前記循環ダクト（３７）の前記吹出口（Ｅ）が形成された位置の高さ（Ｔ）を、前記吸込口（Ｆ）が形成された位置の高さ（Ｓ）から徐々に大きくするようにして、前記吹出口（Ｅ）が形成された位置の高さ（Ｔ）を最大にするようにしたことを特徴とする。 Further, in the present invention, the height (T) of the circulation duct (37) at the position where the outlet (E) is formed is derived from the height (S) of the position where the suction port (F) is formed. It is characterized in that the height (T) of the position where the air outlet (E) is formed is maximized by gradually increasing the size.
また、本発明は、前記格納室（３２ａ）に被加熱物（Ｗ）を搬出入するための搬出入口（４１）を、前記格納回転体（３２）の回転により前記第二ゾーン（Ｑ）から前記第一ゾーン（Ｐ）に進入する部分におけるその第一ゾーン（Ｐ）側に位置する前記炉本体（３１）の壁面に設けたことを特徴とする。 Further, in the present invention, the carry-in / out port (41) for carrying in / out the object to be heated (W) into / out of the storage chamber (32a) is provided from the second zone (Q) by rotation of the storage rotating body (32). It is characterized in that it is provided on the wall surface of the furnace body (31) located on the first zone (P) side of the portion entering the first zone (P).
ここで、上記括弧内の記号は、図面および後述する発明を実施するための形態に掲載された対応要素または対応事項を示す。 Here, the symbols in parentheses indicate the corresponding elements or corresponding items described in the drawings and the mode for carrying out the invention described later.
本発明の記載の回転式熱処理炉によれば、格納回転体の中央部に形成された空隙に固定された竪型円筒状の内筒部に開口部を設けることで形成された第一ゾーンと、循環ダクトを設けることで形成された第二ゾーンを分断して、第一ゾーンに対しては、加熱器で温められた熱風を、内筒部の上部に設けられた第一ファンから送るようにし、第二ゾーンに対しては、第一ファンとは独立した第二ファンから風を送るようにしたので、第一ゾーン内における温度制御と第二ゾーン内における温度制御を別々に行うことができる。
これによって、ゾーン毎に精度の高い制御を簡単に行うことができ、例えば、第一ゾーンについては、格納室内の被加熱物を瞬時に加熱させる加熱帯（加熱ゾーン）とし、第二ゾーンについては、被加熱物の温度を一定に維持する均熱帯（均熱ゾーン）としたときの制御をきめ細かく行うことができる。
According to the rotary heat treatment furnace described in the present invention, the first zone formed by providing an opening in a vertical cylindrical inner cylinder portion fixed to a gap formed in the central portion of the storage rotating body. , The second zone formed by providing the circulation duct is divided, and the hot air warmed by the heater is sent to the first zone from the first fan provided at the upper part of the inner cylinder. Since the wind is sent from the second fan, which is independent of the first fan, to the second zone, the temperature control in the first zone and the temperature control in the second zone can be performed separately. it can.
As a result, highly accurate control can be easily performed for each zone. For example, the first zone is a heating zone (heating zone) that instantly heats the object to be heated in the storage chamber, and the second zone is a heating zone. It is possible to perform fine control when the temperature of the object to be heated is kept constant in the tropics (heat soaking zone).
また、従来例のように、第一ゾーンと第二ゾーンの両方に一台のファンを介して熱風を送るものでは大きな風量・風速を必要とすることから大きなファンを、炉本体の天井に設置する必要があるが、本発明では二台のファンを使用することになるので、天井に設ける側の一台のファンの大ききを従来のものと比較して小さいものにすることができる。
その結果、炉本体の天井スペースを小さくすることができるので炉本体の高さを低く炉本体の体積を小さいものとし、熱損失を少なくして省エネを図ることができる。
また、回転駆動装置やファンといった最低限の部材を取外すだけで、他は分解せずに炉本体を輸送可能となる。
In addition, as in the conventional example, a large fan is installed on the ceiling of the furnace body because a large air volume and speed are required to send hot air to both the first zone and the second zone via one fan. However, since two fans are used in the present invention, the size of one fan provided on the ceiling can be made smaller than that of the conventional fan.
As a result, the ceiling space of the furnace body can be reduced, so that the height of the furnace body can be lowered and the volume of the furnace body can be reduced, and heat loss can be reduced to save energy.
In addition, the furnace body can be transported without disassembling the others by simply removing the minimum members such as the rotary drive device and the fan.
また、本発明によれば、循環ダクトの中央部に吸込口を形成し、吹出口を循環ダクトの周方向の両端部の内筒部側に形成して、第二ファンからの熱風を、循環ダクトの中央部から周方向外向きに送り吹出口から吐出し、第二ゾーンに位置する格納室の外周側に沿って周方向内きに送り循環ダクトの吸込口から第二ファンまで戻すようにしたので、構造が簡易である。また、上下縦方向に熱風を循環させる第一ゾーンに対して、第二ゾーンでは横方向（周方向）に風を循環させる方式であるので、バランスがよく短時間で均熱状態にすることができる。 Further, according to the present invention, a suction port is formed in the central portion of the circulation duct, and outlets are formed on the inner cylinder side of both ends in the circumferential direction of the circulation duct to circulate hot air from the second fan. Discharge from the center of the duct outward in the circumferential direction from the outlet, send it inward along the outer peripheral side of the storage chamber located in the second zone, and return it from the suction port of the circulation duct to the second fan. Therefore, the structure is simple. In addition, in contrast to the first zone, which circulates hot air in the vertical and vertical directions, the second zone circulates air in the horizontal direction (circumferential direction). it can.
また、本発明によれば、循環ダクトについて、吸込口が形成された位置の高さに比較して、吹出口が形成された位置の高さを大きく、例えば、徐々に大きくするようにしたので、循環ダクトの構成だけで風速をアップさせることができる。 Further, according to the present invention, the height of the position where the air outlet is formed is made larger than the height of the position where the suction port is formed, for example, the height of the circulation duct is gradually increased. , The wind speed can be increased only by the configuration of the circulation duct.
また、本発明によれば、格納室に被加熱物を搬出入するための搬出入口を、格納回転体の回転により第二ゾーンから第一ゾーンに進入する部分におけるその第一ゾーン側に位置する炉本体の壁面に設けたので、搬出入口から漏れる熱量を抑制することができる。 Further, according to the present invention, the carry-in / out port for carrying in / out the object to be heated into the storage chamber is located on the first zone side of the portion entering the first zone from the second zone by the rotation of the storage rotating body. Since it is provided on the wall surface of the furnace body, the amount of heat leaking from the carry-in / out port can be suppressed.
なお、本発明の回転式熱処理炉のように、第一ゾーン専用の第一ファンと、第二ゾーン専用の第二ファンをそれぞれ設けて、熱循環させる点は、上述した特許文献１には全く記載されていない。 It should be noted that the above-mentioned Patent Document 1 completely describes that the first fan dedicated to the first zone and the second fan dedicated to the second zone are provided and heat-circulated as in the rotary heat treatment furnace of the present invention. Not listed.
図１乃至図４を参照して、本発明の実施形態に係る回転式熱処理炉３０を説明する。
この回転式熱処理炉３０は、アルミニウム合金等の被加熱物Ｗに熱処理を施すための熱処理炉であり、炉本体３１と、格納回転体３２と、回転駆動装置３３を備えるとともに、炉本体３１の内側は、内筒部３４，第一仕切壁３５，第二仕切壁３６によって、第一ゾーンＰと第二ゾーンＱに分断され、第一ゾーンＰでは第一ファン３８によって熱風が循環させられ、第二ゾーンＱでは第二ファン３９によって熱風が循環させられるようにしている。
The rotary heat treatment furnace 30 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 4.
The rotary heat treatment furnace 30 is a heat treatment furnace for heat-treating an object W to be heated such as an aluminum alloy, and includes a furnace main body 31, a retractable rotating body 32, a rotation driving device 33, and the furnace main body 31. The inside is divided into a first zone P and a second zone Q by an inner cylinder portion 34, a first partition wall 35, and a second partition wall 36, and hot air is circulated by a first fan 38 in the first zone P. In the second zone Q, hot air is circulated by the second fan 39.
炉本体３１は、平面視略円形状で、主に格納回転体３２と第一ファン３８，第二ファン３９を収容し、炉本体３１内の熱が外部に逃げ難くなるように断熱処理されている。 The furnace body 31 has a substantially circular shape in a plan view, and mainly accommodates the retractable rotating body 32, the first fan 38, and the second fan 39, and is heat-insulated so that the heat inside the furnace body 31 does not easily escape to the outside. There is.
格納回転体３２は、格納室３２ａが周方向に複数（ここでは１２個）かつ多段状（ここでは６段）に形成されるとともに中央部には空隙３２ｂが形成されてなり、平面視略ドーナツ状である。この格納回転体３２は、炉本体３１の内側に第一ゾーンＰと第二ゾーンＱを跨ぐように設置され、しかも回転自在に支持される。 The storage rotating body 32 has a plurality of storage chambers 32a in the circumferential direction (12 in this case) and is formed in a multi-stage shape (6 stages in this case), and a gap 32b is formed in the central portion. It is a state. The retractable rotating body 32 is installed inside the furnace body 31 so as to straddle the first zone P and the second zone Q, and is rotatably supported.
また格納室３２ａは、それぞれが略等しい大きさの平面視扇形であって、径方向に延びる側壁３２ｃで周方向が仕切られており、内部に被加熱物Ｗを格納する。
そして、第一ゾーンＰに位置する格納室３２ａが平面視で６個、第二ゾーンＱに位置する格納室３２ａが平面視で６個になるように、格納回転体３２は配置されている。
Further, the storage chambers 32a are fan-shaped in a plan view having substantially the same size, and are partitioned in the circumferential direction by the side wall 32c extending in the radial direction, and the object to be heated W is stored therein.
The storage rotating bodies 32 are arranged so that the number of storage chambers 32a located in the first zone P is 6 in a plan view and the number of storage chambers 32a located in the second zone Q is 6 in a plan view.
回転駆動装置３３は、格納回転体３２を回転させる動力源であり、炉本体３１の下部に設けられた回転用歯車３３ａに噛み合う歯車３３ｂを回転させる駆動用モータ３３ｃからなる。
本実施形態においては、回転駆動装置３３は格納回転体３２を平面視時計回り（図１の紙面において右回り）に回転させる。
一つの格納室３２ａが、格納室３２ａに被加熱物Ｗを搬出入するために設けられた搬出入口４１の正面となる状態では、回転駆動装置３３は停止している。そして、所定時間の経過後に回転駆動装置３３は１／１２回転（３０度）だけ格納回転体３２を回転させた後、回転を停止する。その後、所定時間が経過するとまた格納回転体３２を１／１２（３０度）回転させる。
このように、回転駆動装置３３は作動と停止を繰り返して、格納回転体３２を断続的に回転させる。
The rotation drive device 33 is a power source for rotating the retractable rotating body 32, and includes a drive motor 33c for rotating a gear 33b that meshes with a rotation gear 33a provided in the lower part of the furnace body 31.
In the present embodiment, the rotation driving device 33 rotates the retractable rotating body 32 clockwise in a plan view (clockwise in the paper surface of FIG. 1).
The rotation drive device 33 is stopped in a state where one storage chamber 32a is in front of the carry-in / out port 41 provided for carrying in / out the object to be heated W in the storage chamber 32a. Then, after the elapse of a predetermined time, the rotation driving device 33 rotates the stored rotating body 32 by 1/12 rotation (30 degrees), and then stops the rotation. After that, when the predetermined time elapses, the storage rotating body 32 is rotated again by 1/12 (30 degrees).
In this way, the rotation drive device 33 repeatedly operates and stops to intermittently rotate the retractable rotating body 32.
なお、図１に示すように、搬出入口４１については、格納回転体３２の回転により第二ゾーンＱから第一ゾーンＰに進入する部分におけるその第一ゾーンＰ側に位置する炉本体３１の壁面に設けるようにしたが、この位置に限られるものではない。 As shown in FIG. 1, with respect to the carry-in / out port 41, the wall surface of the furnace body 31 located on the first zone P side in the portion entering the first zone P from the second zone Q due to the rotation of the storage rotating body 32. However, it is not limited to this position.
内筒部３４は、竪型円筒状で、格納回転体３２の中央部に形成された空隙３２ｂに設置されている。内筒部３４は、炉本体３１の天井から吊り下げられ、格納回転体３２に対して非接触状態になるように、内筒部３４の周側面は格納室３２ａに対して間があけられ、内筒部３４の底面は格納回転体３２の床面に対して間があけられている。
また、内筒部３４の周側面の平面視左周側面（図１，図２の紙面において左側）には格納室３２ａに連通した開口部３４Ａが設けられている。なお、平面視右周側面（図１，図２の紙面において右側）は通常の円筒体の周側面で曲面状の仕切壁として機能する閉状態であり、特に開口部は設けられていない。ここでは内筒部３４の周側面の平面視左周側面を大きく開けた開口部３４Ａとしているが、熱風を通過されるものであればよく、開口部３４Ａの大きさは特に限定されるものではない。
The inner cylinder portion 34 has a vertical cylindrical shape and is installed in a gap 32b formed in the central portion of the storage rotating body 32 . The peripheral side surface of the inner cylinder portion 34 is spaced from the storage chamber 32a so that the inner cylinder portion 34 is suspended from the ceiling of the furnace main body 31 and is not in contact with the storage rotating body 32 . The bottom surface of the inner cylinder portion 34 is spaced from the floor surface of the storage rotating body 32 .
Further, an opening 34A communicating with the storage chamber 32a is provided on the left peripheral side surface (left side in the paper surface of FIGS. 1 and 2) of the peripheral side surface of the inner cylinder portion 34 in a plan view. The right peripheral side surface in a plan view (right side in the paper surface of FIGS. 1 and 2) is a closed state in which the peripheral side surface of a normal cylinder functions as a curved partition wall, and no opening is particularly provided. Here, the opening 34A is wide open on the left peripheral side surface in a plan view of the peripheral side surface of the inner cylinder portion 34, but it is sufficient as long as it allows hot air to pass through, and the size of the opening 34A is not particularly limited. Absent.
また、内筒部３４の右周側面における周方向一方端部に相対向する、炉本体３１の壁面の位置から格納回転体３２までは、第一仕切壁３５が延び、内筒部３４の右周側面における周方向他方端部に相対向する、炉本体３１の壁面の位置から格納回転体３２までは、第二仕切壁３６が延びている。すなわち、第一仕切壁３５は、内筒部３４の右周側面の一方端部における、炉本体３１の壁面の内面側から径方向に炉本体３１の中心に向って延び、第二仕切壁３６は、内筒部３４の右周側面の他方端部における、炉本体３１の壁面の内面側から径方向に炉本体３１の中心に向って延びている。本実施形態において、内筒部３４の右周側面の一方端部の位置ｍと、内筒部３４の右周側面の他方端部の位置ｎとは、内筒部３４において１８０度ずれた位置にあり、内筒部３４の右周側面とは、円を等しく半分にしたときの半円の右側に相当するものである。 Further, the first partition wall 35 extends from the position of the wall surface of the furnace body 31 facing the one end in the circumferential direction on the right peripheral side surface of the inner cylinder portion 34 to the storage rotating body 32, and the right side of the inner cylinder portion 34. The second partition wall 36 extends from the position of the wall surface of the furnace body 31 facing the other end in the circumferential direction on the peripheral side surface to the storage rotating body 32. That is, the first partition wall 35 extends radially from the inner surface side of the wall surface of the furnace main body 31 toward the center of the furnace main body 31 at one end of the right peripheral side surface of the inner cylinder portion 34, and the second partition wall 36 Extends radially from the inner surface side of the wall surface of the furnace body 31 toward the center of the furnace body 31 at the other end of the right peripheral side surface of the inner cylinder portion 34. In the present embodiment, the position m of one end of the right peripheral side surface of the inner cylinder portion 34 and the position n of the other end portion of the right peripheral side surface of the inner cylinder portion 34 are positioned 180 degrees apart from each other. The right peripheral side surface of the inner cylinder portion 34 corresponds to the right side of the semicircle when the circles are equally halved.
ここで、格納回転体３２が回転し、第一仕切壁３５の格納回転体３２側の部位が格納回転体３２の側壁３２ｃの一つの外周側と近接するときには、第二仕切壁３６の格納回転体３２側の部位は格納回転体３２の側壁３２ｃの他の一つの外周側と近接するようにされている。
これにより、図２に示すように、炉本体３１を平面視で、第一仕切壁３５と一つの側壁３２ｃ，内筒部３４の右周側面，そして第二仕切壁３６と他の一つの側壁３２ｃによって一連の仕切壁が構成される。この一連の仕切壁Ｌによって、炉本体３１の内部は仕切壁Ｌの左側に位置する第一ゾーンＰと、仕切壁Ｌの右側に位置する第二ゾーンＱに分断される。
Here, when the storage rotating body 32 rotates and the portion of the first partition wall 35 on the storage rotating body 32 side is close to one outer peripheral side of the side wall 32c of the storage rotating body 32, the storage rotation of the second partition wall 36 The portion on the body 32 side is made close to the other outer peripheral side of the side wall 32c of the retractable rotating body 32.
As a result, as shown in FIG. 2, when the furnace body 31 is viewed in a plan view, the first partition wall 35 and one side wall 32c, the right peripheral side surface of the inner cylinder portion 34, and the second partition wall 36 and another side wall A series of partition walls are constructed by 32c. By this series of partition walls L, the inside of the furnace body 31 is divided into a first zone P located on the left side of the partition wall L and a second zone Q located on the right side of the partition wall L.
また、第二ゾーンＱとなる、内筒部３４の右周側面と炉本体３１の壁面の間には循環ダクト３７が形成されている。
循環ダクト３７は、図５に示すように、内筒部３４の右周側面の形状に沿って立設された曲面状のダクト内壁３７Ａと、炉本体３１の壁面の形状に沿って立設された曲面状のダクト外壁３７Ｂと、ダクト内壁３７Ａの上面とダクト外壁３７Ｂの上面同士を連結して上部を塞いだダクト上面壁３７Ｃからなり、略中央部には循環ダクト３７の吸込口Ｆが形成され、循環ダクト３７の周方向の両端部の内筒部３４側には、それぞれ吹出口Ｅが形成されている。
吸込口Ｆは円形状の丸穴であり、吹出口Ｅはダクト内壁３７Ａの上面から下面まで開口した矩形状の長穴である。
なお、本実施形態では、循環ダクト３７の周方向の一端部を、上述した第一仕切壁３５とし、循環ダクト３７の周方向の他端部を、上述した第二仕切壁３６としているが、第一仕切壁３５，第二仕切壁３６と循環ダクト３７とは別体のもので構成するようにしてもよい。
Further, a circulation duct 37 is formed between the right peripheral side surface of the inner cylinder portion 34 and the wall surface of the furnace body 31, which is the second zone Q.
As shown in FIG. 5, the circulation duct 37 is erected along the shape of the curved duct inner wall 37A erected along the shape of the right peripheral side surface of the inner cylinder portion 34 and the shape of the wall surface of the furnace body 31. It is composed of a curved duct outer wall 37B, a duct upper surface wall 37C that connects the upper surface of the duct inner wall 37A and the upper surface of the duct outer wall 37B to close the upper surface, and a suction port F of the circulation duct 37 is formed in a substantially central portion. Therefore, outlets E are formed on the inner cylinder 34 sides of both ends of the circulation duct 37 in the circumferential direction.
The suction port F is a circular hole, and the air outlet E is a rectangular elongated hole that opens from the upper surface to the lower surface of the duct inner wall 37A.
In the present embodiment, one end of the circulation duct 37 in the circumferential direction is the above-mentioned first partition wall 35, and the other end of the circulation duct 37 in the circumferential direction is the above-mentioned second partition wall 36. The first partition wall 35, the second partition wall 36, and the circulation duct 37 may be formed separately.
第一ファン３８は、内筒部３４の上部で炉本体３１の天井に設けられ、第一ゾーンＰに対してだけに加熱器Ｈで温められた風を送る。加熱器Ｈは、第一ゾーンＰにおいて炉本体３１の天井から吊り下げられたヒータであり、出力７５ｋｗのものを使用した。なお、加熱器Ｈとしてはバーナ等の他の熱源であってもよい。 The first fan 38 is provided on the ceiling of the furnace main body 31 at the upper part of the inner cylinder portion 34, and sends the air warmed by the heater H only to the first zone P. The heater H was a heater suspended from the ceiling of the furnace body 31 in the first zone P, and was used with an output of 75 kW. The heater H may be another heat source such as a burner.
第二ファン３９は、循環ダクト３７の吸込口Ｆに相対向した炉本体３１の壁面に設けられ、第二ゾーンＱに対してだけに風を送る。第二ファン３９は第一ファン３８とは独立した別のものである。
第二ファン３９は、第二ゾーンＱを均熱帯にすることができればよくその送風は熱風でも冷風でもよい。なお、本実施形態では第二ゾーンＱには加熱器を設けていないが、温度調整のために加熱器を設けるようにしてもよい。
The second fan 39 is provided on the wall surface of the furnace body 31 facing the suction port F of the circulation duct 37, and sends wind only to the second zone Q. The second fan 39 is different from the first fan 38.
The second fan 39 may blow hot air or cold air as long as the second zone Q can be made tropical. Although the second zone Q is not provided with a heater in the present embodiment, a heater may be provided for temperature adjustment.
これらのファン３８，３９としては、軸流ファンやシロッコラジカルファン等を用いることができる。
なお、第一ファン３８は、出力３０ｋｗで、風量２５００ｍ3／ｍｉｎの熱風を送ることができるのに対して、第二ファン３９は、出力１０ｋｗで、風量５００ｍ3／ｍｉｎの熱風を送ることができるものを使用している。
As these fans 38 and 39, an axial fan, a sirocco radical fan, or the like can be used.
The first fan 38 can send hot air with an output of 30 kW and an air volume of 2500 m 3 / min, whereas the second fan 39 can send hot air with an output of 10 kW and an air volume of 500 m 3 / min. I'm using what I can.
このように構成された回転式熱処理炉３０における熱風の循環について説明する。
第一ゾーンＰでは、図１、図３、図４に示すように、第一ファン３８から、加熱器Ｈで温められた熱風Ｘを、内筒部３４内を上から下降させ開口部３４Ａから、第一ゾーンＰに位置する格納室３２ａの外周側に向けて略水平に、すなわち格納回転体３２の径方向内側から外側に向けて送り、炉本体３１の壁面に沿って上昇させて第一ファン３８まで戻すように循環させる。
The circulation of hot air in the rotary heat treatment furnace 30 configured as described above will be described.
In the first zone P, as shown in FIGS. 1, 3, and 4, hot air X warmed by the heater H is lowered from above in the inner cylinder portion 34 from the first fan 38 and from the opening 34A. , The first is to be fed substantially horizontally toward the outer peripheral side of the storage chamber 32a located in the first zone P, that is, from the radial inside to the outside of the storage rotating body 32, and raised along the wall surface of the furnace body 31. Circulate so that it returns to the fan 38.
第二ゾーンＱは、図１、図５に示すように、第二ファン３９からの風Ｙを、循環ダクト３７の略中央部から周方向外向きに送り二つの吹出口Ｅから吐出し、第二ゾーンＱに位置する格納室３２ａの外周側に沿って周方向内きに送り、循環ダクト３７の吸込口Ｆから第二ファン３９まで戻すように循環させる。 In the second zone Q, as shown in FIGS. 1 and 5, the wind Y from the second fan 39 is sent outward from the substantially central portion of the circulation duct 37 in the circumferential direction and discharged from the two outlets E. It is sent inward in the circumferential direction along the outer peripheral side of the storage chamber 32a located in the second zone Q, and is circulated so as to return from the suction port F of the circulation duct 37 to the second fan 39.
このとき、第一ゾーンＰに位置する６個の格納室３２ａに格納された被加熱物Ｗは、加熱器Ｈで温められた熱風Ｘが第一ファン３８から送られることで、加熱により瞬時に昇温させられる。
そして、格納回転体３２の回転によって、第一ゾーンＰから第二ゾーンＱに移動させられた６個の格納室３２ａに格納された被加熱物Ｗは、第二ファン３９によって循環ダクト３７を流れる熱風（冷風であってもよい）Ｙによって設定された均一の温度に維持される。
つまり、第一ゾーンＰが、被加熱物Ｗを加熱して昇温させる加熱帯（加熱ゾーン）となり、第二ゾーンＱが、その昇温した状態を保つ均熱帯（均熱ゾーン）となる。
なお、第一ゾーンＰ，第二ゾーンＱにはそれぞれ温度センサ（図示しない）が設けられ、それぞれ所定の温度に制御されるようになっている。
At this time, the object W to be heated stored in the six storage chambers 32a located in the first zone P is instantly heated by the hot air X warmed by the heater H being sent from the first fan 38. The temperature is raised.
Then, the object W to be heated stored in the six storage chambers 32a moved from the first zone P to the second zone Q by the rotation of the storage rotating body 32 flows through the circulation duct 37 by the second fan 39. It is maintained at a uniform temperature set by hot air (which may be cold air) Y.
That is, the first zone P becomes a heating zone (heating zone) for heating the object W to be heated to raise the temperature, and the second zone Q becomes a soaking zone (heat soaking zone) for maintaining the raised state.
A temperature sensor (not shown) is provided in each of the first zone P and the second zone Q, and each is controlled to a predetermined temperature.
以上のように構成された回転式熱処理炉３０によれば、格納回転体３２の中央部に形成された空隙３２ｂに固定された竪型円筒状の内筒部３４の平面視左周側面に格納室３２ａに連通した開口部３４Ａを設けることで形成された第一ゾーンＰと、循環ダクト３７を設けることで形成された第二ゾーンＱを分断して、第一ゾーンＰに対しては、加熱器Ｈで温められた熱風Ｘを、内筒部３４の上部に設けられた第一ファン３８から送るようにし、第二ゾーンＱに対しては、第一ファン３８とは独立した第二ファン３９から風を送るようにしたので、第一ゾーンＰ内における温度制御と第二ゾーンＱ内における温度制御を別々に行うことができる。
これによって、ゾーン毎に精度の高い制御を簡単に行うことができる。すなわち、第一ゾーンＰを、格納室３２ａ内の被加熱物Ｗを瞬時に加熱させる加熱帯（加熱ゾーン）とし、第二ゾーンＱを、被加熱物Ｗの温度を一定に維持する均熱帯（均熱ゾーン）にしたときの制御をきめ細かく行うことができる。
According to the rotary heat treatment furnace 30 configured as described above, it is stored in the left peripheral side surface in a plan view of the vertical cylindrical inner cylinder portion 34 fixed to the gap 32b formed in the central portion of the storage rotating body 32. The first zone P formed by providing the opening 34A communicating with the chamber 32a and the second zone Q formed by providing the circulation duct 37 are separated, and the first zone P is heated. The hot air X warmed by the vessel H is sent from the first fan 38 provided in the upper part of the inner cylinder portion 34, and for the second zone Q, the second fan 39 independent of the first fan 38 is sent. Since the air is sent from the air, the temperature control in the first zone P and the temperature control in the second zone Q can be performed separately.
As a result, highly accurate control can be easily performed for each zone. That is, the first zone P is a heating zone (heating zone) that instantly heats the object W to be heated in the storage chamber 32a, and the second zone Q is a tropical zone (heating zone) that maintains the temperature of the object W to be heated constant. It is possible to perform fine control when the heat equalizing zone is set.
なお、本実施形態では、図５に示したように、循環ダクト３７では、吸込口Ｆが形成された位置においても吹出口Ｅが形成された位置においても同じ高さにしたが、図６に示すように、吸込口Ｆが形成された位置の高さＳに比較して、吹出口Ｅが形成された位置の高さＴを大きくするようにしてもよい。ここでは、循環ダクト３７の吹出口Ｅが形成された位置の高さＴを、吸込口Ｆが形成された位置の高さＳから徐々に大きくするようにして、吹出口Ｅが形成された位置の高さＴを最大にするようにしている。
これによれば、循環ダクト３７の形状を変えるだけで風速をアップさせることができるとともに循環ダクト３７の中央部上部に空きスペースを確保することができる。
In the present embodiment, as shown in FIG. 5, in the circulation duct 37, the height is the same both at the position where the suction port F is formed and at the position where the air outlet E is formed. As shown, the height T at the position where the air outlet E is formed may be made larger than the height S at the position where the suction port F is formed. Here, the height T of the position where the air outlet E of the circulation duct 37 is formed is gradually increased from the height S of the position where the suction port F is formed, so that the position where the air outlet E is formed is formed. The height T of is maximized.
According to this, the wind speed can be increased only by changing the shape of the circulation duct 37, and an empty space can be secured in the upper part of the central portion of the circulation duct 37.
また、循環ダクト３７については、内筒部３４の右周側面と炉本体３１の壁面の間で内筒部３４側に、曲面状のダクト内壁３７Ａを設け、炉本体３１の壁面側に同じく曲面状のダクト外壁３７Ｂを設けてダクト上面壁３７Ｃで上面を塞いだものであるが、ダクト外壁３７Ｂを省略して、ダクト内壁３７Ａと炉本体３１の壁面の内壁とで循環ダクト３７を形成しダクト上面壁３７Ｃで上面を塞ぐようにすることもできる。 Regarding the circulation duct 37, a curved duct inner wall 37A is provided on the inner cylinder 34 side between the right peripheral side surface of the inner cylinder 34 and the wall surface of the furnace body 31, and the same curved surface is provided on the wall surface side of the furnace body 31. A duct outer wall 37B is provided and the upper surface is closed by the duct upper surface wall 37C. However, the duct outer wall 37B is omitted, and the duct inner wall 37A and the inner wall of the wall surface of the furnace body 31 form a circulation duct 37. It is also possible to block the upper surface with the upper surface wall 37C.
また、循環ダクト３７の中央部に一つの吸込口Ｆを形成し、吹出口Ｅを循環ダクト３７の周方向の両端部の内筒部３４側に向けて二つ形成するようにしたが、循環ダクト３７の周方向の両端部のうち一方側に吸込口Ｆを形成し他方側に吹出口Ｅを形成するようにしてもよい。これに対応して、第二ファン３９を設置する位置も変えるようにしてもよい。 Further, one suction port F is formed in the central portion of the circulation duct 37, and two outlets E are formed toward the inner cylinder portion 34 side of both ends in the circumferential direction of the circulation duct 37. A suction port F may be formed on one side of both ends of the duct 37 in the circumferential direction, and an outlet E may be formed on the other side. Correspondingly, the position where the second fan 39 is installed may be changed.
また、本実施形態では、格納回転体３２を回転させることにより、第一ゾーンＰに位置する格納室３２ａの数を平面視で６個、第二ゾーンＱに位置する格納室３２ａの数を平面視で６個としたが、全体の１２個という数や、第一ゾーンＰと第二ゾーンＱに対する格納室３２ａの割合も１対１に限定されるわけではない。 Further, in the present embodiment, by rotating the storage rotating body 32, the number of the storage chambers 32a located in the first zone P is 6 in a plan view, and the number of the storage chambers 32a located in the second zone Q is a plane. Although the number is set to 6 visually, the total number of 12 and the ratio of the storage chamber 32a to the first zone P and the second zone Q are not limited to 1: 1.
また、内筒部３４の平面視左周側面に格納室３２ａに連通した開口部３４Ａ側に各段，各列の格納室３２ａに風量を均等に分配させるための整流板を設置するようにしてもよい。 Further, on the left peripheral side surface of the inner cylinder portion 34 in a plan view, a straightening vane for evenly distributing the air volume is installed in each stage and in each row of the storage chamber 32a on the opening 34A side communicating with the storage chamber 32a. May be good.
２０ 回転式熱処理炉
２１ 仕切り
２２ａ 格納室
２４ ファン
３０ 回転式熱処理炉
３１ 炉本体
３２ 格納回転体
３２ａ 格納室
３２ｂ 空隙
３２ｃ 側壁
３３ 回転駆動装置
３３ａ 回転用歯車
３３ｂ 歯車
３３ｃ 駆動用モータ
３４ 内筒部
３４Ａ 開口部
３５ 第一仕切壁
３６ 第二仕切壁
３７ 循環ダクト
３７Ａ ダクト内壁
３７Ｂ ダクト外壁
３７Ｃ ダクト上面壁
３８ 第一ファン
３９ 第二ファン
４１ 搬出入口
Ｅ 吹出口
Ｆ 吸込口
Ｈ ヒータ（加熱器）
Ｌ 仕切壁
Ｐ 第一ゾーン
Ｑ 第二ゾーン
Ｗ 被加熱物
Ｘ 第一ゾーン内の熱風
Ｙ 第一ゾーン内の風
20 Rotary heat treatment furnace 21 Partition 22a Storage chamber 24 Fan 30 Rotary heat treatment furnace 31 Furnace body 32 Storage rotating body 32a Storage chamber 32b Void 32c Side wall 33 Rotation drive device 33a Rotation gear 33b Gear 33c Drive motor 34 Inner cylinder 34A Opening 35 1st partition wall 36 2nd partition wall 37 Circulation duct 37A Duct inner wall 37B Duct outer wall 37C Duct top wall
38 1st fan 39 2nd fan 41 Carry-in / out port E Air outlet F Suction port H Heater (heater)
L Partition wall P 1st zone Q 2nd zone W Heated object X Hot air in the 1st zone Y Wind in the 1st zone
Claims (5)
径方向に延びる側壁で仕切られた格納室が周方向に複数かつ多段状に形成されるとともに中央部には空隙が形成されてなる平面視ドーナツ状で、前記第一ゾーンと前記第二ゾーンを跨ぐように設置されしかも回転自在に支持される格納回転体と、
前記格納回転体を回転させる回転駆動装置と、
前記格納回転体に非接触状態で前記格納回転体の中央部に形成された空隙に固定された竪型円筒状で、その周側面の平面視左周側面に前記格納室に連通した開口部が設けられるとともに平面視右周側面は閉状態にされたと内筒部と、
前記内筒部の右周側面における周方向一方端部に相対向する、前記炉本体の壁面の位置から前記格納回転体まで延びる第一仕切壁と、
前記内筒部の右周側面における周方向他方端部に相対向する、前記炉本体の壁面の位置から前記格納回転体まで延びる第二仕切壁と、
前記内筒部の右周側面と前記炉本体の壁面の間に、前記内筒部の右周側面の形状に沿って立設された曲面状のダクト内壁を有し、その前記内筒部側に吹出口と吸込口が互いに離れた位置に形成された循環ダクトと、
前記第一ゾーンに加熱器で温められた熱風を送る、前記内筒部の上部に設けられた第一ファンと、
前記第二ゾーンに風を送る、前記第一ファンとは独立した第二ファンを備え、
前記第一ゾーンは、前記第一仕切壁及び前記第二仕切壁の左側に位置し、前記第二ゾーンは、前記第一仕切壁及び前記第二仕切壁の右側に位置するもので、
前記第一仕切壁の前記格納回転体側の部位が前記側壁の一つと近接するときに、前記第二仕切壁の前記格納回転体側の部位が前記側壁の他の一つと近接し、
前記第一ファンからの熱風を、前記内筒部内に下降させ前記開口部から、前記第一ゾーンに位置する前記格納室の外周側に向けて水平に送り、前記炉本体の壁面に沿って上昇させて前記第一ファンまで戻すように循環させるとともに、
前記第二ファンからの熱風を、前記循環ダクト内を周方向外向きに送り前記吹出口から吐出し、前記第二ゾーンに位置する前記格納室の外周側に沿って周方向内向きに送り前記吸込口から前記第二ファンまで戻すように循環させたことを特徴とする回転式熱処理炉。
The inside of the furnace is divided into the first zone and the second zone, and
The first zone and the second zone are divided into a donut shape in a plan view in which a plurality of storage chambers partitioned by side walls extending in the radial direction are formed in a plurality of stages in the circumferential direction and a gap is formed in the central portion. A retractable rotating body that is installed so as to straddle and is rotatably supported,
A rotation drive device that rotates the retractable rotating body,
It has a vertical cylindrical shape fixed to a gap formed in the central portion of the storage rotating body in a non-contact state with the storage rotating body, and an opening communicating with the storage chamber is provided on the left peripheral side surface in a plan view of the peripheral side surface thereof. When it is provided and the right peripheral side surface in plan view is closed, the inner cylinder and
A first partition wall extending from the position of the wall surface of the furnace body to the retractable rotating body, which faces one end in the circumferential direction on the right peripheral side surface of the inner cylinder portion.
A second partition wall extending from the position of the wall surface of the furnace body to the retractable rotating body, which faces the other end in the circumferential direction on the right peripheral side surface of the inner cylinder portion.
Between the right peripheral side surface of the inner cylinder portion and the wall surface of the furnace body, a curved duct inner wall erected along the shape of the right peripheral side surface of the inner cylinder portion is provided, and the inner cylinder portion side thereof. A circulation duct in which the air outlet and the suction port are separated from each other,
A first fan provided in the upper part of the inner cylinder portion that sends hot air warmed by a heater to the first zone, and
It has a second fan that is independent of the first fan and sends wind to the second zone.
The first zone is located on the left side of the first partition wall and the second partition wall, and the second zone is located on the right side of the first partition wall and the second partition wall.
When the portion of the first partition wall on the retractable rotating body side is close to one of the side walls, the portion of the second partition wall on the retractable rotating body side is close to the other one of the side walls.
Hot air from the first fan is lowered into the inner cylinder portion and horizontally sent from the opening toward the outer peripheral side of the storage chamber located in the first zone, and rises along the wall surface of the furnace body. Let it circulate so that it returns to the first fan, and
The hot air from the second fan is sent outward in the circumferential direction in the circulation duct, discharged from the air outlet, and sent inward in the circumferential direction along the outer peripheral side of the storage chamber located in the second zone. A rotary heat treatment furnace characterized in that it is circulated so as to return from the suction port to the second fan.
前記第二ファンは、前記循環ダクトに形成された吸込口に相対向する前記炉本体の壁面近傍に設けられ、
前記第二ファンからの熱風を、前記循環ダクトの中央部から周方向外向きに送り前記吹出口から吐出し、前記第二ゾーンに位置する前記格納室の外周側に沿って周方向内きに送り前記循環ダクトの吸込口から前記第二ファンまで戻すようにしたことを特徴とする請求項１に記載の回転式熱処理炉。 The suction port of the circulation duct is formed in the central portion of the circulation duct, and the air outlet is formed on the inner cylinder portion side of both ends in the circumferential direction of the circulation duct.
The second fan is provided near the wall surface of the furnace body facing the suction port formed in the circulation duct.
Hot air from the second fan is sent outward in the circumferential direction from the central portion of the circulation duct and discharged from the air outlet, and inward in the circumferential direction along the outer peripheral side of the storage chamber located in the second zone. The rotary heat treatment furnace according to claim 1, wherein the feed is returned from the suction port of the circulation duct to the second fan.
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