JPH102672A - Safety device for molten metal heating apparatus - Google Patents
Safety device for molten metal heating apparatusInfo
- Publication number
- JPH102672A JPH102672A JP3559997A JP3559997A JPH102672A JP H102672 A JPH102672 A JP H102672A JP 3559997 A JP3559997 A JP 3559997A JP 3559997 A JP3559997 A JP 3559997A JP H102672 A JPH102672 A JP H102672A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- cylinder
- outer cylinder
- gas
- molten metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Regulation And Control Of Combustion (AREA)
- Air Supply (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は湯槽中にある溶融金
属を加熱する溶融金属加熱装置の安全装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a molten metal heating device for heating molten metal in a bath.
【０００２】[0002]
【従来の技術】湯槽内に貯留された溶融金属の中に上方
より有底状の筒（以下外筒という）を垂下させ該外筒中
に底部に向けて燃焼ガスを吹出するバーナを設け、該外
筒壁を伝熱させて溶融金属を加熱するようにした加熱装
置は、例えば特開昭６１−４９９８６号公報にて知られ
ているが、こ種の加熱装置ではバーナの熱を無駄なく溶
融金属に伝達できることから省エネルギー効果がある利
点があるものである。2. Description of the Related Art A bottomed cylinder (hereinafter referred to as an outer cylinder) is suspended from above in molten metal stored in a hot water tank, and a burner is provided in the outer cylinder to blow out combustion gas toward the bottom. A heating device that heats a molten metal by transferring heat to an outer cylinder wall is known, for example, from Japanese Patent Application Laid-Open No. 61-49986, but this type of heating device melts the heat of a burner without waste. It has the advantage of having an energy saving effect because it can be transmitted to metal.
【０００３】[0003]
【発明が解決しようとする課題】しかるに従来のこの種
の加熱装置は次のような欠点がある。 （ａ）外筒内部の燃焼筒が非常に高温度になるので耐熱
性および耐久性が充分でない。 （ｂ）所要の燃焼能力を満たすために燃焼筒が持つべき
内径と、その燃焼ガスを伝熱効率を考慮したうえでの所
要の速度で排出されるようにするための外筒内周と該燃
焼筒の外筒とのなす間隙寸法との関係が従来では燃焼筒
の肉厚に制約されて自由に設計することができなかっ
た。このため充分な熱効率を有ししかも必要な溶解能力
を持つ加熱装置が製作し難くなることが多かった。 （ｃ）外筒から排出された燃焼排ガスは未だ高い温度を
有しているにも拘らずその熱は金属溶解のために充分に
利用されることなく排棄されておりその点での熱損失も
大きかった。 （ｄ）セラミックス製の外筒は繰り返し加わる熱応力に
より使用中に突然割れることがあるが、その場合溶融金
属が外筒内の燃焼筒部に侵入し危険であったが、その状
況が外観上確認できないため異常な燃焼状態になっても
発見がおくれていた。However, this type of conventional heating apparatus has the following disadvantages. (A) Since the temperature of the combustion cylinder inside the outer cylinder becomes extremely high, heat resistance and durability are not sufficient. (B) The inner diameter that the combustion cylinder should have in order to satisfy the required combustion capacity, the inner circumference of the outer cylinder for discharging the combustion gas at a required speed in consideration of the heat transfer efficiency, and the combustion In the related art, the relationship between the cylinder and the gap dimension formed between the cylinder and the outer cylinder is limited by the wall thickness of the combustion cylinder, so that the cylinder cannot be freely designed. For this reason, it has often been difficult to manufacture a heating device having sufficient thermal efficiency and required melting ability. (C) Although the flue gas discharged from the outer cylinder still has a high temperature, its heat is discarded without being sufficiently used for melting the metal, and the heat loss at that point Was also big. (D) The outer cylinder made of ceramics may be broken suddenly during use due to repeated thermal stress. In this case, the molten metal may enter the combustion cylinder inside the outer cylinder, which is dangerous. Since it could not be confirmed, the discovery was delayed even if it became an abnormal combustion state.
【０００４】そこで本発明は上記欠点を解消し、耐久性
に秀れ熱効率が高くかつまた安全に使用できる溶融金属
加熱装置の安全装置を提供しようとするものである。Accordingly, an object of the present invention is to solve the above-mentioned drawbacks and to provide a safety device for a molten metal heating apparatus which is excellent in durability, has high thermal efficiency and can be used safely.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
本発明の溶融金属加熱装置の安全装置は、セラミックス
製の有底筒状の外筒を溶融金属の湯槽中に垂下し、該外
筒の中心に該外筒内底部へ向けて燃焼ガスを吹出す燃焼
筒を垂下し、該燃焼筒から排出された燃焼ガスは該外筒
内底部にて反転させて該外筒の上方へ排出するようにし
た溶融金属加熱装置において、燃焼筒へ燃料ガスおよび
燃焼用空気を供給する給ガス管および給気管を設け、該
給ガス管または給気管の途中に圧力検出器を設けると共
に、該給ガス管の途中に遮断弁を設け、該圧力検出器の
異常高圧検出信号により該遮断弁が遮閉されるようにし
たことを特徴とする。In order to achieve the above object, a safety device for a molten metal heating apparatus according to the present invention is provided by hanging a ceramic bottomed cylindrical outer cylinder into a molten metal bath. The combustion cylinder that blows out the combustion gas toward the bottom of the outer cylinder is suspended at the center of the cylinder, and the combustion gas discharged from the combustion cylinder is inverted at the bottom of the outer cylinder and discharged above the outer cylinder. In such a molten metal heating apparatus, a gas supply pipe and a gas supply pipe for supplying fuel gas and combustion air to a combustion cylinder are provided, and a pressure detector is provided in the gas supply pipe or the gas supply pipe. A shutoff valve is provided in the middle of the pipe, and the shutoff valve is shut off by an abnormally high pressure detection signal of the pressure detector.
【０００６】このため、外筒が割れ溶融金属が侵入して
燃焼管を閉塞したとき給ガス管または給気管の圧力が異
常に高くなることでただちに遮断弁を閉塞させ燃料ガス
の供給を止めて火災，爆発等の災害を未然に防ぐ。For this reason, when the outer cylinder cracks and molten metal enters and the combustion pipe is closed, the pressure of the gas supply pipe or the supply pipe becomes abnormally high, so that the shut-off valve is immediately closed and the supply of fuel gas is stopped. Prevent disasters such as fires and explosions.
【０００７】[0007]
【発明の実施の形態】図面に従い本発明の実施の形態を
説明する。図１において、１は溶融金属２を貯留する湯
槽、３は該湯槽に被せられた断熱蓋である。断熱蓋３に
は円形の取付孔４が開設されている。５は両端部にフラ
ンジ５ａ，５ｂが形成され中間に段部５ｃが形成された
筒形の基体で、該基体５を取付孔４中に嵌挿し、フラン
ジ５ａを該段熱蓋３上面の取付孔４外周縁に支持する。
６は前記フランジ５ａに合致するフランジ６ａが形成さ
れ外周壁に図２に示したように円周方向に延びる給気接
続管部６ｂを一体に形成した給気筒、７は該給気筒６上
に被着された円板状の蓋体で該蓋体の中心から先端に着
火部８ａを有する棒状の点火装置８を垂下すると共に、
その外周に燃料ガスを供給する給ガス筒９を垂下する。
１０は該給ガス筒９に連通するよう蓋体７に形成された
給ガス接続管部である。Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a hot water tank for storing a molten metal 2, and 3 denotes a heat insulating lid covered by the hot water tank. A circular mounting hole 4 is opened in the heat insulating lid 3. Reference numeral 5 denotes a cylindrical base having flanges 5a and 5b formed at both ends and a step 5c formed in the middle. The base 5 is inserted into the mounting hole 4, and the flange 5a is mounted on the upper surface of the step heating lid 3. The hole 4 is supported on the outer peripheral edge.
Reference numeral 6 denotes an air supply cylinder in which a flange 6a corresponding to the flange 5a is formed, and an air supply connection pipe portion 6b extending in a circumferential direction is integrally formed on an outer peripheral wall as shown in FIG. A rod-shaped ignition device 8 having an ignition portion 8a at the tip from the center of the lid is hung down with the attached disc-shaped lid,
A gas supply cylinder 9 for supplying a fuel gas to the outer periphery thereof is suspended.
Reference numeral 10 denotes a gas supply connection pipe formed on the lid 7 so as to communicate with the gas supply cylinder 9.
【０００８】蓋体５の下端のフランジ５ｂには環状連結
体１１が着脱自在に連結される。即ち、図３に示したよ
うにフランジ５ｂに複数の止孔１１ａ，１１ａ，１１ａ
を開設すると共に、環状連結体１１の上面縁にピン１
２，１２，１２を一体に突設し該各ピンを各止孔１１
ａ，１１ａ，１１ａに嵌挿し該各ピンのフランジ５ｂ上
に突出する部分に設けられた横孔にクサビ１３，１３，
１３を挿通し、該各クサビをフランジ５ｂ上面に支持さ
せることにより該環状連結体１１を基体５に固着する。
なお１４は環状連結体１１に開設された排気口である。
また、環状連結体１１の下縁部には連結環１５により耐
熱性に優れたセラミックス製の有底筒状の外筒１６を連
結し、該外筒１６を湯槽１中の溶融金属２に浸漬状なる
ように垂下させる。なお連結環１５は外筒１６の上端縁
に形成された拡径部１６ａに係合すると共に環状連結体
１１に対しては溶接されている。１７，１８はその連結
部の隙間を塞いでいるセラミックウールである。An annular connector 11 is detachably connected to the flange 5b at the lower end of the cover 5. That is, as shown in FIG. 3, a plurality of stopper holes 11a, 11a, 11a are formed in the flange 5b.
And a pin 1 on the upper edge of the annular connector 11.
2, 12 and 12 are integrally protruded and each pin is
a, 11a, and 11a, wedges 13, 13, and 13 are provided in lateral holes provided at portions protruding above the flange 5b of the pins.
13, the wedge is supported on the upper surface of the flange 5b to fix the annular connector 11 to the base 5.
Reference numeral 14 denotes an exhaust port provided in the annular connector 11.
In addition, a lower end portion of the annular connecting body 11 is connected with a ceramic bottomed cylindrical outer cylinder 16 having excellent heat resistance by a connecting ring 15, and the outer cylinder 16 is immersed in the molten metal 2 in the water bath 1. Hang it down. The connecting ring 15 is engaged with the enlarged diameter portion 16 a formed on the upper edge of the outer cylinder 16 and is welded to the annular connecting body 11. Reference numerals 17 and 18 denote ceramic wool which closes the gap between the connecting portions.
【０００９】一方基体５の段部５ｃには円筒形の保護筒
１９の上端に形成されたフランジ１９ａが担持されてい
る。保護筒１９の内周にはさらに一体に環状突起１９ｂ
が形成されており該環状突起１９ｂに上縁部２０ａを係
合させることで燃焼筒２０を該保護筒１９中に外筒１６
内底部へ向けて垂下状に配設する。なお、燃焼筒２０の
外周と保護筒１９の内周との間には通気間隙２１が形成
されるようにすると共に、該通気間隙２１に燃焼用空気
の一部を導びくため燃焼筒２０の上縁部近くに導気口２
２を開設する。保護筒１９の下縁部内周は燃焼筒２０の
外周面よりの離間部分２３があって通気間隙２１の下部
が外筒１６内空間に開口している。On the other hand, the step 5c of the base 5 carries a flange 19a formed at the upper end of a cylindrical protective tube 19. An annular projection 19b is further integrally formed on the inner periphery of the protection cylinder 19.
The combustion cylinder 20 is inserted into the protection cylinder 19 by engaging the upper edge 20a with the annular projection 19b.
It is arranged in a hanging shape toward the inner bottom. A ventilation gap 21 is formed between the outer circumference of the combustion cylinder 20 and the inner circumference of the protection cylinder 19, and a part of the combustion air is introduced into the ventilation gap 21 to guide a part of the combustion air. Air vent 2 near upper edge
Open 2 The inner circumference of the lower edge of the protection cylinder 19 has a space 23 away from the outer peripheral surface of the combustion cylinder 20, and the lower part of the ventilation gap 21 is open to the space inside the outer cylinder 16.
【００１０】２４は給ガス筒９の下端に装着されたバー
ナ部材で、該バーナ部材は燃料ガス吹出口２４ａが中心
部に形成されその外周部に燃焼用空気吹出口２４ｂが形
成されてなる給気接続管部６ｂに連通する給気管２６に
圧力検出器２７，逆止弁２８，遮断弁２９が設けられ
る。また給ガス接続管部１０に連通する給ガス管３０に
は逆止弁３１，遮断弁３２が設けられる。Reference numeral 24 denotes a burner member mounted at the lower end of the gas supply cylinder 9. The burner member has a fuel gas outlet 24a formed at the center and a combustion air outlet 24b formed at the outer periphery. A pressure detector 27, a check valve 28, and a shutoff valve 29 are provided in an air supply pipe 26 communicating with the air connection pipe section 6b. A check valve 31 and a shutoff valve 32 are provided in the gas supply pipe 30 communicating with the gas supply pipe section 10.
【００１１】しかしてこの加熱装置では、吹出口２４
ａ，２４ｂから噴出する燃料ガスおよび燃焼用空気の混
合ガスに着火部８ａにて着火され、燃焼筒２０内にて下
向きの燃焼火災が形成される。その燃焼ガスは外筒１６
内底部へ向けて吹出され該外筒内底部にてＵターンして
外筒１６が保護筒１９となす空隙２５を上昇して排気口
１４より断熱蓋３の下部空間に排出され該下部空間を燃
焼排ガスにより満たす。給気接続管部６より供給された
燃焼用空気の一部は導気口を通り通気間隙２１に入り該
通気間隙２１中を下降して離間部分２３より外筒１６中
に排出される。そこで燃焼筒１９の先端より吹出る燃焼
ガスとまざって上方に排出される。こうして通気間隙２
１を通る燃焼用空気は保護筒１９および燃焼筒２０に接
触してこれらを冷却しその過熱を防止することができ
る。運転中に外筒１６に万一クラックが入って中に溶融
金属２が侵入した場合燃焼管２０が閉塞され、燃料ガス
および燃焼用空気の行き場がなくなることによって給気
管２６中の気圧が異常に高くなり圧力検出器２７にその
異常高圧が検出され、その信号により遮断弁２９，３２
をただちに遮断させる。なおこの実施形態では圧力検出
器２７を給気管２６に設けたが、給ガス管３０に設けて
その異常圧力を検出するようにしてもよい。In this heating apparatus, however, the outlet 24
A mixture gas of the fuel gas and the combustion air ejected from the fuel cells a and 24b is ignited by the ignition part 8a, and a downward combustion fire is formed in the combustion tube 20. The combustion gas is transferred to the outer cylinder 16
The air is blown out toward the inner bottom, the U-turn is made at the inner bottom of the outer cylinder, the outer cylinder 16 rises in the gap 25 formed by the protective cylinder 19, and is discharged from the exhaust port 14 into the lower space of the heat insulating lid 3. Fill with flue gas. A part of the combustion air supplied from the air supply connection pipe 6 enters the ventilation gap 21 through the air guide port, descends in the ventilation gap 21, and is discharged into the outer cylinder 16 from the separated portion 23. There, it is discharged upward while being mixed with the combustion gas blown out from the tip of the combustion cylinder 19. Thus the ventilation gap 2
The combustion air passing through 1 comes into contact with the protection cylinder 19 and the combustion cylinder 20 to cool them and prevent their overheating. In the event that a crack enters the outer cylinder 16 during operation and the molten metal 2 penetrates into the outer cylinder 16, the combustion pipe 20 is closed, and there is nowhere to go for fuel gas and combustion air, so that the pressure in the air supply pipe 26 becomes abnormal. It becomes high and the abnormal high pressure is detected by the pressure detector 27, and the shutoff valves 29 and 32 are
Immediately. In this embodiment, the pressure detector 27 is provided in the air supply pipe 26, but may be provided in the gas supply pipe 30 to detect the abnormal pressure.
【００１２】なお、給気接続管部６ｂは図２に示される
ように給気筒６の円周方向に形成されていて、該給気接
続管部６ｂから給気筒６内に送給された燃焼用空気は矢
印で示したように螺旋状に回転しながら下降してゆき導
気口２２および吹出口２４ｂに分配される。このように
燃焼用空気が旋回して供給されるので複数の導気口２２
および吹出口２４ｂに均等な圧力で燃焼用空気を吹き出
させることができる。溶融金属２は外筒１６の壁からの
熱伝達により溶融状態に保つことができる。The air supply connection pipe portion 6b is formed in the circumferential direction of the air supply cylinder 6 as shown in FIG. 2, and the combustion supplied from the air supply connection pipe portion 6b into the air supply cylinder 6 is formed. The use air descends while rotating spirally as shown by the arrows, and is distributed to the air guide port 22 and the air outlet 24b. Since the combustion air is swirled and supplied in this manner, the plurality of air guide ports 22 are provided.
Further, the combustion air can be blown out to the blowout port 24b with a uniform pressure. The molten metal 2 can be kept in a molten state by heat transfer from the wall of the outer cylinder 16.
【００１３】[0013]
【発明の効果】このように本発明の溶融金属加熱装置の
安全装置は、セラミックス製の有底筒状の外筒を溶融金
属の湯槽中に垂下し、該外筒の中心に該外筒内底部へ向
けて燃焼ガスを吹出す燃焼筒を垂下し、該燃焼筒から排
出された燃焼ガスは該外筒内底部にて反転させて該外筒
の上方へ排出するようにした溶融金属加熱装置におい
て、燃焼筒へ燃焼ガスおよび燃焼用空気を供給する給ガ
ス管および給気管を設け、該給ガス管または給気管の途
中に圧力検出器を設けると共に、該給ガス管の途中に遮
断弁を設け、該圧力検出器の異常高圧検出信号により該
遮断弁が遮閉されるようにしたので、異常高圧を検出し
て燃料ガス等の供給がただちに遮断され、外筒が割れを
起こした場合にも燃料ガスの噴出により火災，爆発等の
災害が発生するのを未然に防止でき、操業の安全を確保
することができる効果がある。As described above, the safety device for a molten metal heating apparatus according to the present invention is such that a bottomed cylindrical outer cylinder made of ceramic is suspended in a molten metal bath and the center of the outer cylinder is provided inside the outer cylinder. A molten metal heating device in which a combustion cylinder that blows out combustion gas toward the bottom is suspended, and the combustion gas discharged from the combustion cylinder is inverted at the bottom of the outer cylinder and discharged above the outer cylinder. In the above, a gas supply pipe and a gas supply pipe for supplying combustion gas and combustion air to the combustion cylinder are provided, a pressure detector is provided in the gas supply pipe or the gas supply pipe, and a shutoff valve is provided in the gas supply pipe. Since the shut-off valve is shut off by the abnormally high pressure detection signal of the pressure detector, the supply of fuel gas or the like is immediately shut off by detecting the abnormally high pressure, and when the outer cylinder is cracked. Also prevent fires, explosions, and other disasters from In prevented natural, there is an effect that it is possible to ensure the safety of operations.
【図１】本発明の溶融金属加熱装置の安全装置の実施形
態を示した縦断面図。FIG. 1 is a longitudinal sectional view showing an embodiment of a safety device for a molten metal heating device of the present invention.
【図２】図１のＡ−Ａ線断面図。FIG. 2 is a sectional view taken along line AA of FIG.
【図３】図１のＢ−Ｂ線断面図。FIG. 3 is a sectional view taken along line BB of FIG. 1;
１ 湯槽 ２ 溶融金属 ３ 断熱蓋 ４ 取付孔 ５ 基体 ６ 給気筒 ９ 給ガス筒 １１ 環状連結体 １４ 排気口 １６ 外筒 １９ 保護筒 ２０ 燃焼筒 ２１ 通気間隙 ２２ 導気口 ２３ 離間部分 ２４ バーナ部材 ２６ 給気管 ２７ 圧力検出器 ２９ 遮断弁 ３０ 給ガス管 ３２ 遮断弁 DESCRIPTION OF SYMBOLS 1 Hot water tank 2 Molten metal 3 Heat insulation lid 4 Mounting hole 5 Base 6 Gas supply cylinder 9 Gas supply cylinder 11 Annular connector 14 Exhaust port 16 Outer cylinder 19 Protection cylinder 20 Combustion cylinder 21 Vent gap 22 Air guide port 23 Separated part 24 Burner member 26 Air supply pipe 27 Pressure detector 29 Shutoff valve 30 Gas supply pipe 32 Shutoff valve
Claims (1)
金属の湯槽中に垂下し、該外筒の中心に該外筒内底部へ
向けて燃焼ガスを吹出す燃焼筒を垂下し、該燃焼筒から
排出された燃焼ガスは該外筒内底部にて反転させて該外
筒の上方へ排出するようにした溶融金属加熱装置におい
て、燃焼筒へ燃料ガスおよび燃焼用空気を供給する給ガ
ス管および給気管を設け、該給ガス管または給気管の途
中に圧力検出器を設けると共に、該給ガス管の途中に遮
断弁を設け、該圧力検出器の異常高圧検出信号により該
遮断弁が遮閉されるようにしたことを特徴とする溶融金
属加熱装置の安全装置。1. A cylindrical bottomed cylinder made of ceramic is suspended in a molten metal bath, and a combustion cylinder that blows out combustion gas toward the bottom of the external cylinder is suspended at the center of the cylinder. In a molten metal heating device in which the combustion gas discharged from the combustion cylinder is inverted at the inner bottom of the outer cylinder and discharged above the outer cylinder, supply of fuel gas and combustion air to the combustion cylinder is performed. A gas pipe and an air supply pipe are provided, and a pressure detector is provided in the gas supply pipe or the air supply pipe, and a shutoff valve is provided in the gas supply pipe, and the shutoff valve is provided by an abnormal high pressure detection signal of the pressure detector. A safety device for a molten metal heating device, characterized in that the device is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3559997A JPH102672A (en) | 1997-02-03 | 1997-02-03 | Safety device for molten metal heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3559997A JPH102672A (en) | 1997-02-03 | 1997-02-03 | Safety device for molten metal heating apparatus |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63117781A Division JP2662663B2 (en) | 1988-05-13 | 1988-05-13 | Molten metal heating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH102672A true JPH102672A (en) | 1998-01-06 |
Family
ID=12446291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3559997A Pending JPH102672A (en) | 1997-02-03 | 1997-02-03 | Safety device for molten metal heating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH102672A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016505487A (en) * | 2012-11-30 | 2016-02-25 | コーニング インコーポレイテッド | Swirl burner and process for combustion melting in liquid |
-
1997
- 1997-02-03 JP JP3559997A patent/JPH102672A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016505487A (en) * | 2012-11-30 | 2016-02-25 | コーニング インコーポレイテッド | Swirl burner and process for combustion melting in liquid |
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