JP2939217B2 - Atmospheric circulation type heat treatment furnace - Google Patents
Atmospheric circulation type heat treatment furnaceInfo
- Publication number
- JP2939217B2 JP2939217B2 JP9303056A JP30305697A JP2939217B2 JP 2939217 B2 JP2939217 B2 JP 2939217B2 JP 9303056 A JP9303056 A JP 9303056A JP 30305697 A JP30305697 A JP 30305697A JP 2939217 B2 JP2939217 B2 JP 2939217B2
- Authority
- JP
- Japan
- Prior art keywords
- atmosphere
- baffle
- furnace
- plate
- circulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
- C03B29/02—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a discontinuous way
- C03B29/025—Glass sheets
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Tunnel Furnaces (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ブラウン管等ガラ
ス製品の熱処理に適した雰囲気循環式熱処理炉に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an atmosphere circulation type heat treatment furnace suitable for heat treatment of glass products such as cathode ray tubes.
【０００２】[0002]
【従来の技術】雰囲気循環式熱処理炉において、特に、
ブラウン管等のガラス製品（処理材）を均一に熱処理す
るためには、循環雰囲気が十分に混合されて均一温度と
なっていることと循環雰囲気が均一に処理材に接触する
こと（偏流を生じないこと）が必要である。そのため、
本出願人は、特開平９−１１８５３３号公報にて、図８
に示す雰囲気循環式熱処理炉を提案した。すなわち、炉
内天井部に循環ファン１を設けるとともに、炉Ｔ′内に
バッフル２を設けて該バッフル２と炉内壁との間で雰囲
気循環路３を形成する一方、前記循環ファン１の下方に
ドーナツ状の邪魔板４を配設し、かつ、前記邪魔板４の
下方に前記バッフル２内を上下に区画する多孔板５を設
けて、炉内雰囲気を前記多孔板５を介して下方に噴出さ
せてベルトＶ上の処理材Ｗを熱処理するものである。な
お、６はバーナである。前記構成とした理由は、循環フ
ァン（ＲＣファン）１は羽根１ａの中心部（ボス部）を
除く内端部側の風量（風速）が一番強いため、この部分
の下方にドーナツ状の邪魔板４を設けて風量の均一化を
図り、さらに、多孔板５を介在させることにより整流し
て風量分布をより均一にすることで前記目的を達成しよ
うとするものである。2. Description of the Related Art In an atmosphere circulation type heat treatment furnace,
In order to uniformly heat-treat a glass product such as a cathode ray tube (processing material), it is necessary that the circulating atmosphere is sufficiently mixed to attain a uniform temperature, and that the circulating atmosphere uniformly contacts the processing material (there is no drift). It is necessary. for that reason,
The present applicant has disclosed in FIG.
The atmosphere circulation type heat treatment furnace shown in the following was proposed. That is, the circulation fan 1 is provided on the ceiling portion of the furnace, and the baffle 2 is provided in the furnace T 'to form the atmosphere circulation path 3 between the baffle 2 and the furnace inner wall. A donut-shaped baffle plate 4 is provided, and a perforated plate 5 is provided below the baffle plate 4 to partition the inside of the baffle 2 up and down, and the atmosphere in the furnace is jetted downward through the perforated plate 5. Then, the processing material W on the belt V is heat-treated. In addition, 6 is a burner. The reason for the above configuration is that the circulation fan (RC fan) 1 has the strongest air volume (wind speed) on the inner end side excluding the center portion (boss portion) of the blade 1a, so that a donut-shaped obstruction is provided below this portion. The purpose is to achieve the above object by providing the plate 4 to make the air volume uniform, and by interposing the perforated plate 5 to rectify and make the air volume distribution more uniform.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前記構
成の雰囲気循環式熱処理炉においても、処理材Ｗ近傍に
おいては、炉幅方向中央部の風量より両端部（バッフル
側板）側の風量の方が大きく、均一な風量分布が得られ
ていないことが判明した。そこで、本発明者らは、その
理由について種々検討の結果、バッフル２の側板２ａ下
端と炉床との間に形成される隙間が前記雰囲気循環路３
の入口ａとなるため、多孔板５から下方に吹き出した雰
囲気は前記循環ファン１と最も短距離にある該循環ファ
ン１の真横下部の入口部分において吸引力が一番大きく
なるため、図９，１０に示すように雰囲気が前記入口部
分に向かって偏流することが判明した。したがって、本
発明は雰囲気循環路の雰囲気入口のうちで、吸引力が一
番大きくなる部分のバッフル側板下部に平板状の邪魔板
を設けてこの部分からの吸引を阻止することにより炉巾
方向の雰囲気風量の均一化を図ることのできる雰囲気循
環式熱処理炉を提供することを目的とする。However, also in the atmosphere circulation type heat treatment furnace having the above-mentioned structure, in the vicinity of the processing material W, the air volume at both ends (baffle side plates) is larger than the air volume at the central portion in the furnace width direction. It was found that a uniform air volume distribution was not obtained. The inventors of the present invention have made various investigations as to the reason. As a result, the gap formed between the lower end of the side plate 2a of the baffle 2 and the hearth has been described.
At this time, the atmosphere blown downward from the perforated plate 5 has the largest suction force at the entrance portion immediately below the circulation fan 1 which is the shortest distance from the circulation fan 1. As shown in FIG. 10, the atmosphere was found to drift toward the entrance. Therefore, the present invention provides a plate-shaped baffle plate at the lower part of the baffle side plate at the part where the suction force is the largest in the atmosphere inlet of the atmosphere circulation path to prevent suction from this part, thereby reducing the width in the furnace width direction. It is an object of the present invention to provide an atmosphere circulation type heat treatment furnace capable of achieving a uniform air volume.
【０００４】[0004]
【課題を解決するための手段】本発明は、前記目的を達
成するために、炉内天井部に設けた循環ファンと炉内に
設けたバッフルにより雰囲気循環路を形成し、前記循環
ファンの下方にドーナツ状の邪魔板を配設するととも
に、この邪魔板の下方に前記バッフル内を上下に区画す
る多孔板を設け、炉内雰囲気を前記多孔板を介して下方
に噴出させて処理材を熱処理したのちバッフル側板下方
から前記雰囲気循環路に循環させる雰囲気循環式熱処理
炉において、前記循環雰囲気通路を形成するバッフル側
板の前記循環ファンの真横下部に平板状の邪魔板を下方
に突設したものである。According to the present invention, in order to achieve the above object, an atmosphere circulation path is formed by a circulation fan provided in a furnace ceiling and a baffle provided in a furnace, and an atmosphere circulation path is provided below the circulation fan. A baffle plate having a donut shape is provided at the bottom of the baffle, and a perforated plate for vertically dividing the inside of the baffle is provided below the baffle plate. The atmosphere in the furnace is blown downward through the perforated plate to heat-treat the processing material. Then, in an atmosphere circulation type heat treatment furnace that circulates from below the baffle side plate to the atmosphere circulation path, a plate-shaped baffle plate protrudes downward just below the circulation fan of the baffle side plate forming the circulation atmosphere passage. is there.
【０００５】[0005]
【発明の実施の形態】つぎに、本発明の実施の形態を図
１〜図３にしたがって説明する。本発明が適用される雰
囲気循環式熱処理炉Ｔは、図２に示すように、加熱・均
熱帯１０、徐冷帯２５および冷却帯２６とからなり、処
理材ＷはコンベアベルトＶによって前記各帯域を搬送さ
れ、その間に熱処理されるものである。なお、前記各帯
域は、複数の単位帯域１０Ａ，２５Ａ，２６Ａからなっ
ている。Next, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 2, an atmosphere circulation type heat treatment furnace T to which the present invention is applied includes a heating / soaking zone 10, a slow cooling zone 25, and a cooling zone 26, and a processing material W is conveyed by a conveyor belt V to each zone. Is transported, and heat-treated during the transport. Each of the bands includes a plurality of unit bands 10A, 25A, and 26A.
【０００６】前記加熱・均熱帯１０の単位帯域１０Ａ
は、大略、図１に示すように、耐火断熱材１２からなる
炉本体１１の炉内に設けたバッフル１３と循環ファン１
７と加熱手段であるバーナ１９とからなる。このバーナ
１９はラジアントチューブ式のバーナあるいは電熱ヒー
タであってもよい。[0006] The unit band 10A of the heating and leveling 10
The baffle 13 and the circulation fan 1 provided in the furnace of a furnace body 11 made of a refractory heat insulating material 12, as shown in FIG.
7 and a burner 19 as a heating means. The burner 19 may be a radiant tube type burner or an electric heater.
【０００７】そして、前記バッフル１３は、上面が舟底
形の天井１５となっており、該天井１５の炉幅方向両端
部に側板１４を有し、炉天井から吊持固定されている。
また、側板１４の下端と炉底部との間および側板１４と
炉側壁との間には、それぞれ空間が設けられる一方、炉
天井に取り付けられた循環ファン１７の羽根１８が前記
天井１５部に位置して、前記空間と循環ファン１７とで
炉内雰囲気循環路（以下、循環路という）１６を形成し
ている。The baffle 13 has a boat-bottomed ceiling 15 on its upper surface, and has side plates 14 at both ends in the furnace width direction of the ceiling 15 and is hung and fixed from the furnace ceiling.
Spaces are respectively provided between the lower end of the side plate 14 and the furnace bottom and between the side plate 14 and the furnace side wall, while the blades 18 of the circulation fan 17 mounted on the furnace ceiling are located at the ceiling 15. The space and the circulation fan 17 form a furnace atmosphere circulation path (hereinafter referred to as a circulation path) 16.
【０００８】また、前記側板１４の循環ファン１７の真
横下部には、所定巾の平板状の邪魔板１４ａを下方に突
設してあり、この部分における循環路１６の入口ａを閉
塞するようになっている。A plate-shaped baffle plate 14a of a predetermined width projects downward from the side plate 14 just below the circulation fan 17 so as to close the entrance a of the circulation passage 16 at this portion. Has become.
【０００９】さらに、前記循環ファン１７の下方にドー
ナツ状の邪魔板２０を配設するとともに、この邪魔板２
０の下方に前記バッフル１３内を上下に区画する多孔板
２４を設けている。Further, a donut-shaped baffle plate 20 is provided below the circulation fan 17 and the baffle plate 2
Below 0, a perforated plate 24 is provided which partitions the inside of the baffle 13 up and down.
【００１０】ところで、前記邪魔板２０は開孔率３８．
２％の多数の孔Ｈ1を有する多孔板（パンチングメタ
ル）からなり、図３，４に示すように中心に開口２１を
有するドーナツ状のもので、円周を８等分するように８
枚のＬ字状のリブ２２が取り付けられている。なお、図
においては、この邪魔板２０は２分割構造となってお
り、一片２０ａを吊りボルト２３により吊り下げたの
ち、他片２０ｂを同様に吊り下げ、その後、リブ２２，
２２をリベット等により一体化したものである。また、
前記邪魔板２０の直径は、前記循環ファン１７の羽根径
を１とすると、１．５であり、かつ、開口２１の直径は
前記羽根胴部径（中心部径）の０．７〜０．８としてあ
る。The baffle plate 20 has an aperture ratio of 38.
Porous plate having a number of holes H 1 2% consists (punching metal), those donut-shaped having an opening 21 at the center as shown in FIGS. 3 and 4, as the circumference 8 equal parts 8
A plurality of L-shaped ribs 22 are attached. In the drawing, the baffle plate 20 has a two-part structure. After one piece 20a is suspended by the suspension bolt 23, the other piece 20b is suspended in the same manner.
22 are integrated by rivets or the like. Also,
The diameter of the baffle plate 20 is 1.5 when the blade diameter of the circulation fan 17 is 1, and the diameter of the opening 21 is 0.7 to 0.2 mm of the blade body diameter (center diameter). There are eight.
【００１１】つぎに、前記構成からなる雰囲気循環式熱
処理炉Ｔの操業について述べる。まず、加熱・均熱帯１
０においては、バーナ１９を燃焼させて循環ファン１７
を回転すると、炉内雰囲気は循環路１６を矢印で示すよ
うに循環し、所定温度に加熱され、循環ファン１７によ
り吸引撹拌されてバッフル１３内で前記邪魔板２０に向
けて吹き出すことになる。Next, the operation of the atmosphere circulation type heat treatment furnace T having the above-described configuration will be described. First, heating and level tropical 1
0, the burner 19 is burned and the circulation fan 17
When the is rotated, the furnace atmosphere circulates through the circulation path 16 as indicated by the arrow, is heated to a predetermined temperature, is suction-stirred by the circulation fan 17, and blows out toward the baffle plate 20 in the baffle 13.
【００１２】この場合において、前記循環ファン１７か
ら吹き出す風量は前述の通り、羽根１８の中心部を除く
内端部において多いが、前記邪魔板２０により遮られ、
該邪魔板２０に設けた前記リブ２２に沿って放射状に均
一に外方に流れるとともに、中央部では、その一部が邪
魔板２０の孔Ｈ1から下方に吹き出し、その後、多孔板
２４の孔Ｈ2によって整流されて多孔板２４からほぼ均
一流量（風量）で下方へ真直に吹き出すことになる。In this case, the amount of air blown out from the circulation fan 17 is large at the inner end except for the center of the blade 18 as described above, but is blocked by the baffle plate 20.
With flows uniformly radially outwardly along the rib 22 provided on the baffle plate 20, the central portion, partly blown out of the hole H 1 of the baffle plate 20 downwardly, then the hole of the perforated plate 24 The flow is rectified by H 2 and blows straight down from the perforated plate 24 at a substantially uniform flow rate (air volume).
【００１３】前記のように真直下方に吹き出された雰囲
気は処理材Ｗを加熱したのち前記側板１４の下方開口か
ら循環路１６に吸引されることになるが、吸引力の最も
大きな開口部分は平板状の邪魔板１４ａで閉塞されてい
るため図５，図６に示すように雰囲気の流れが分散さ
れ、全体として炉巾方向においてほぼ均一の流量とな
り、つまり、炉内雰囲気は処理材Ｗに均一に接触するこ
とになる。The atmosphere blown straight downward as described above is heated by the processing material W and then sucked into the circulation path 16 from the lower opening of the side plate 14. The opening having the largest suction force is 5 and 6, the flow of the atmosphere is dispersed as shown in FIGS. 5 and 6, and the flow rate becomes substantially uniform in the furnace width direction as a whole. The contact will be uniform.
【００１４】図７は本発明の炉巾方向における雰囲気風
量分布状態を示し、図からも本発明においては炉巾方向
においてほぼ均一の風量となっていることが明らかであ
る。FIG. 7 shows the distribution of the ambient air flow in the furnace width direction of the present invention. It is apparent from the figure that the air flow in the present invention is substantially uniform in the furnace width direction.
【００１５】なお、前記説明は加熱・均熱帯１０につい
て実施したが、徐冷帯２５においては、バッフル１３の
上方に大気を導入する冷却ダクトを設けるとともに、多
孔板上方のバッフル空間に排気ダクトを設け、炉内循環
雰囲気温度を、バーナ１９の燃焼量、冷却ダクトからの
大気等の導入量および排気ダクトからの排気量を調節し
て所定温度にするようにする。Although the above description has been made for the heating and leveling zone 10, in the slow cooling zone 25, a cooling duct for introducing the atmosphere is provided above the baffle 13, and an exhaust duct is provided for the baffle space above the perforated plate. The temperature of the furnace circulating atmosphere is adjusted to a predetermined temperature by adjusting the amount of combustion of the burner 19, the amount of air introduced from the cooling duct, and the amount of exhaust from the exhaust duct.
【００１６】また、冷却帯２６においては、徐冷帯２５
の構造において、バーナをなくするとともに炉本体１１
を非断熱構造とすればよい。In the cooling zone 26, the slow cooling zone 25
In the above structure, the burner is eliminated and the furnace body 11
May have a non-insulated structure.
【００１７】[0017]
【発明の効果】以上の説明で明らかなように、本発明に
よれば、循環ファンの下方にドーナツ状の邪魔板を配設
したため、中央部の大流量は外方に流れて、直接多孔板
を介して流入せず、全体として循環ファンから下方にほ
ぼ均一に吹き出す。なお、前記邪魔板を前述のように多
孔板で構成すれば、より整流されるため、より風量分布
が均一となる。しかも、前述のようにほぼ均一に下方に
吹き出した雰囲気はバッフルの側板下方の隙間から吸引
されるが、吸引力が最も大きい部分に平板状の邪魔板が
設けてあるため、一部分に集中することなく均一に隙間
から吸引され、処理材を均一に熱処理する。As is apparent from the above description, according to the present invention, since the donut-shaped baffle plate is disposed below the circulation fan, a large flow rate in the central portion flows outward, and the perforated plate is directly provided. Does not flow through the circulating fan but blows out almost uniformly downward as a whole. If the baffle plate is made of a perforated plate as described above, the flow is more rectified and the air volume distribution becomes more uniform. In addition, as described above, the atmosphere blown down substantially uniformly is sucked from the gap below the side plate of the baffle, but since the plate-shaped baffle plate is provided in the portion where the suction force is greatest, it is necessary to concentrate on a part. It is sucked uniformly from the gap and heat-treated the processing material uniformly.
【図１】 加熱・均熱帯の断面図。FIG. 1 is a cross-sectional view of a heated / uniform tropical zone.
【図２】 雰囲気循環式熱処理炉の概略平面図。FIG. 2 is a schematic plan view of an atmosphere circulation type heat treatment furnace.
【図３】 図１の邪魔板の平面図。FIG. 3 is a plan view of the baffle plate of FIG. 1;
【図４】 図３のIV−IV線断面図。FIG. 4 is a sectional view taken along line IV-IV of FIG. 3;
【図５】 加熱・均熱帯における雰囲気流れを示す説明
図。FIG. 5 is an explanatory diagram showing an atmosphere flow in heating and solitary tropics.
【図６】 加熱・均熱帯の雰囲気流れを示す説明図。FIG. 6 is an explanatory diagram showing a heating / uniform tropical atmosphere flow.
【図７】 風量分布状態図。FIG. 7 is an air flow distribution diagram.
【図８】 従来の加熱・均熱帯の断面図。FIG. 8 is a cross-sectional view of a conventional heating / uniform tropical zone.
【図９】 従来の加熱・均熱帯における雰囲気流れを示
す説明図。FIG. 9 is an explanatory diagram showing an atmosphere flow in a conventional heating / uniform tropical zone.
【図１０】 従来の加熱・均熱帯における雰囲気流れを
示す説明図。FIG. 10 is an explanatory diagram showing an atmosphere flow in a conventional heating / uniform tropical zone.
１０Ａ…加熱・均熱帯、１１…炉本体、１３…バッフ
ル、１４…側板、１４ａ…平板状邪魔板、１７…循環フ
ァン、１８…羽根、１９…バーナ、２０…ドーナツ状邪
魔板、２１…開口、２２…リブ、２３…吊りボルト、２
４…多孔板、Ｈ1，Ｈ2…孔。10A: heating and leveling, 11: furnace body, 13: baffle, 14: side plate, 14a: flat baffle, 17: circulation fan, 18: blade, 19: burner, 20: donut baffle, 21: opening , 22 ... rib, 23 ... hanging bolt, 2
4 ... perforated plate, H 1, H 2 ... hole.
Claims (1)
設けたバッフルにより雰囲気循環路を形成し、前記循環
ファンの下方にドーナツ状の邪魔板を配設するととも
に、この邪魔板の下方に前記バッフル内を上下に区画す
る多孔板を設け、炉内雰囲気を前記多孔板を介して下方
に噴出させて処理材を熱処理したのちバッフル側板下方
から前記雰囲気循環路に循環させる雰囲気循環式熱処理
炉において、 前記循環雰囲気通路を形成するバッフル側板の前記循環
ファンの真横下部に平板状の邪魔板を下方に突設したこ
とを特徴とする雰囲気循環式熱処理炉。1. An atmosphere circulation path is formed by a circulation fan provided in a ceiling portion of a furnace and a baffle provided in the furnace, and a donut-shaped baffle plate is disposed below the circulation fan. An atmosphere circulation type in which a perforated plate for partitioning the inside of the baffle up and down is provided below, and the furnace atmosphere is jetted downward through the perforated plate to heat-treat the processing material and then circulate from the lower side of the baffle side plate to the atmosphere circulation path. An atmosphere circulation type heat treatment furnace, characterized in that a plate-shaped baffle plate protrudes downward immediately below the circulation fan of the baffle side plate forming the circulation atmosphere passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9303056A JP2939217B2 (en) | 1997-11-05 | 1997-11-05 | Atmospheric circulation type heat treatment furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9303056A JP2939217B2 (en) | 1997-11-05 | 1997-11-05 | Atmospheric circulation type heat treatment furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11142060A JPH11142060A (en) | 1999-05-28 |
| JP2939217B2 true JP2939217B2 (en) | 1999-08-25 |
Family
ID=17916385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9303056A Expired - Fee Related JP2939217B2 (en) | 1997-11-05 | 1997-11-05 | Atmospheric circulation type heat treatment furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2939217B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102551053B1 (en) * | 2021-05-12 | 2023-07-05 | 주식회사 한국제이텍트써모시스템 | Heater unit of heat treatment oven |
-
1997
- 1997-11-05 JP JP9303056A patent/JP2939217B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11142060A (en) | 1999-05-28 |
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