JP5155584B2 - Dip tube - Google Patents

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JP5155584B2
JP5155584B2 JP2007092367A JP2007092367A JP5155584B2 JP 5155584 B2 JP5155584 B2 JP 5155584B2 JP 2007092367 A JP2007092367 A JP 2007092367A JP 2007092367 A JP2007092367 A JP 2007092367A JP 5155584 B2 JP5155584 B2 JP 5155584B2
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dip tube
cooling air
burner
flow path
air flow
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JP2008249262A (en
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行男 清水
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Osaka Gas Co Ltd
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Description

本発明は、金属溶解炉で用いられる浸漬管に関するものである。 The present invention relates to a dip tube used in a metal melting furnace.

従来より、例えば亜鉛メッキ等を行うために亜鉛等の金属の溶融状態を維持する金属溶解炉において、金属を加熱する加熱手段としてバーナを収容した浸漬管が用いられている。図５に浸漬管の従来例を示す。   Conventionally, a dip tube containing a burner has been used as a heating means for heating a metal in a metal melting furnace that maintains a molten state of a metal such as zinc in order to perform galvanization or the like. FIG. 5 shows a conventional example of a dip tube.

浸漬管２は、セラミックからなる有底筒状をしたもので、浸漬管の上端開口からバーナ４を挿入して浸漬管２内の上部に配置し、浸漬管２内のバーナ４よりも下側の空間が燃焼空間となる。そしてバーナ４を燃焼させることで浸漬管２内の燃焼空間に高温の燃焼ガスを排出し、浸漬管２を高温にすると共に熱を供給して、浸漬管２に接している溶融金属１０の溶融状態を維持するものである。図５に示す従来例では、バーナ４に、一対の蓄熱式のバーナ４ａ、４ｂを交番燃焼させる所謂リジェネバーナを用いている。リジェネバーナは、燃料ガス供給路４１と空気供給路４２とを備えると共に、空気供給部にアルミナボール等からなる蓄熱体４３を収容しており、各蓄熱体４３は空気流路を介して四方弁４４に接続されると共に、四方弁４４は給気ブロア４５及び排気ブロア４６に接続される。本実施形態では燃料ガス供給路４１を共通とすると共に空気供給路４２を別々に構成され、一空気供給路４２と燃料ガス供給路４１とでバーナ４ａ、４ｂが構成される。そして、一方のバーナ４ａにて燃焼中に他方のバーナ４ｂより浸漬管２内の燃焼ガスを排気し、次に四方弁４４を切り替えて各バーナ４ａ、４ｂの燃焼、排気を交番させ、これにより交番燃焼を行うものである。この時、排気側のバーナ４ｂにて浸漬管２内の燃焼ガスを排気する際に蓄熱体４３に燃焼ガスの熱を蓄熱し、次にこのバーナ４ｂにて燃焼する際に、蓄熱した熱によって燃焼用空気の予熱を行うことで、高温の燃焼ガスの排熱を高効率で回収することができる。   The dip tube 2 has a bottomed cylindrical shape made of ceramic, and a burner 4 is inserted from the upper end opening of the dip tube and disposed at the upper part in the dip tube 2, and below the burner 4 in the dip tube 2. This space becomes the combustion space. Then, by burning the burner 4, high-temperature combustion gas is discharged into the combustion space in the dip tube 2, the dip tube 2 is heated to a high temperature, and heat is supplied to melt the molten metal 10 in contact with the dip tube 2. The state is maintained. In the conventional example shown in FIG. 5, a so-called regenerative burner that alternately burns a pair of regenerative burners 4 a and 4 b is used for the burner 4. The regenerative burner includes a fuel gas supply path 41 and an air supply path 42, and a heat storage body 43 made of alumina balls or the like is accommodated in the air supply section, and each heat storage body 43 is a four-way valve via an air flow path. The four-way valve 44 is connected to an air supply blower 45 and an exhaust blower 46. In this embodiment, the fuel gas supply path 41 is made common and the air supply path 42 is configured separately, and the one air supply path 42 and the fuel gas supply path 41 configure the burners 4a and 4b. Then, during combustion in one burner 4a, the combustion gas in the dip tube 2 is exhausted from the other burner 4b, and then the four-way valve 44 is switched to alternate combustion and exhaust of each burner 4a, 4b. It performs alternating combustion. At this time, when the combustion gas in the dip tube 2 is exhausted by the burner 4b on the exhaust side, the heat of the combustion gas is stored in the heat storage body 43, and then when the combustion is performed by the burner 4b, By preheating the combustion air, the exhaust heat of the high-temperature combustion gas can be recovered with high efficiency.

ところで浸漬管２は、溶融金属１０に浸漬されている状態で、溶融金属１０のメタルライン５（溶湯面）が浸漬管２の上下方向の中間部に位置することとなる。この時、浸漬管２のメタルライン５の上側の部分では温度差が大きくなって熱応力が発生し、浸漬管２が破損してしまうという問題があった。そこで、浸漬管の内面に断熱性を有する隔壁を設けるものが考えられたが（例えば特許文献１参照）、このものにあっては、隔壁が加熱されて劣化することで断熱性が下がり、さらには断熱材に割れが発生して脱落し、結局浸漬管に熱応力が発生してしまうものであった。   By the way, the dip tube 2 is immersed in the molten metal 10, and the metal line 5 (molten metal surface) of the molten metal 10 is located in the middle portion in the vertical direction of the dip tube 2. At this time, there is a problem that the temperature difference is increased in the portion on the upper side of the metal line 5 of the dip tube 2 and a thermal stress is generated, so that the dip tube 2 is broken. Then, although what provided the partition which has heat insulation in the inner surface of a dip tube was considered (for example, refer patent document 1), in this thing, heat insulation deteriorates because a partition heats and deteriorates, Cracked the insulation and dropped off, resulting in thermal stress in the dip tube.

また、浸漬管２の材質に耐熱性が高いセラミックを用いると、浸漬管２の酸化に対する耐性が低く、寿命が短いという問題があった。   Further, when a ceramic having high heat resistance is used as the material of the dip tube 2, there is a problem that the dip tube 2 has low resistance to oxidation and has a short life.

このため、セラミックを材質に用いて耐酸性を向上させるのに加えて、熱応力の発生を防止することのできる浸漬管が望まれていた。 For this reason, in addition to improving the acid resistance using ceramic as a material, a dip tube capable of preventing the generation of thermal stress has been desired.

本発明は上記の従来の問題点に鑑みて発明したものであって、その目的とするところは、耐酸性を向上させると共に熱応力の発生を防止して寿命を延ばすことのできる浸漬管を提供することを課題とするものである。 The present invention was invented in view of the conventional problems described above, it is an object of providing a dip tube which can extend the life by preventing the occurrence of thermal stress improves the resistance to acid It is an object to do.

上記課題を解決するために請求項１に係る発明にあっては、金属溶解炉１にて溶融金属１０に浸漬される浸漬管２であって、浸漬管２を有底筒状をしたセラミックで形成すると共に内部を燃焼空間２０とし、浸漬管２の上部に浸漬管２の内面との間に隙間３をあけてバーナ４を配設し、浸漬管２の上端部から少なくとも浸漬管２を溶融金属１０に浸漬した時のメタルライン５の位置にかけて前記浸漬管２の内面とバーナ４との間の隙間３に、内部に冷却空気流路６０を備えた布状部材で構成され前記冷却空気流路６０を流れる冷却空気を前記布状部材の繊維の隙間から前記浸漬管２内に排出可能とし、前記冷却空気により冷却される断熱部材６を設けて成ることを特徴とするものである。 In order to solve the above-mentioned problem, the invention according to claim 1 is a dip tube 2 immersed in a molten metal 10 in a metal melting furnace 1, wherein the dip tube 2 is made of ceramic having a bottomed cylindrical shape. At the same time, a combustion space 20 is formed, and a burner 4 is disposed above the dip tube 2 with a gap 3 between the inner surface of the dip tube 2 and at least the dip tube 2 is melted from the upper end of the dip tube 2. In the gap 3 between the inner surface of the dip tube 2 and the burner 4 over the position of the metal line 5 when immersed in the metal 10, the cooling air flow is constituted by a cloth-like member having a cooling air flow path 60 therein. Cooling air flowing through the path 60 can be discharged into the dip tube 2 from the gap between the fibers of the cloth-like member, and a heat insulating member 6 cooled by the cooling air is provided.

浸漬管２のメタルライン５より上側の部分は大きな温度差によって大きな熱応力が発生してしまうが、請求項１に係る発明のように冷却空気流路６０を備えた断熱部材６を設けたことで、前記熱応力の発生を抑えると共に断熱部材６の劣化を防止し、耐酸性および耐熱性に優れて寿命の長い浸漬管２とすることができる。   Although the portion above the metal line 5 of the dip tube 2 generates a large thermal stress due to a large temperature difference, the heat insulating member 6 provided with the cooling air channel 60 is provided as in the invention according to claim 1. Thus, generation of the thermal stress can be suppressed and deterioration of the heat insulating member 6 can be prevented, and the dip tube 2 having excellent acid resistance and heat resistance and having a long life can be obtained.

また、請求項２に係る発明は、請求項１に係る発明において、断熱部材６の冷却空気流路６０内に、冷却空気を冷却空気流路６０の一端側から他端側にかけて略均等に噴出する噴出孔７３を形成した送気管７２を設けて成ることを特徴とするものである。このような構成とすることで、冷却空気流路６０全体にわたって冷却空気を万遍なく行き渡らせることができて、確実に冷却を行うことができる。   The invention according to claim 2 is the invention according to claim 1, wherein the cooling air is ejected substantially uniformly from one end side to the other end side of the cooling air passage 60 in the cooling air passage 60 of the heat insulating member 6. It is characterized in that an air supply pipe 72 in which an ejection hole 73 is formed is provided. By setting it as such a structure, cooling air can be spread over the whole cooling air flow path 60, and it can cool reliably.

本発明は、断熱部材の劣化を防止し、耐酸性および耐熱性に優れて寿命の長い浸漬管とすることができる。   The present invention prevents deterioration of the heat insulating member, and can be a dip tube having excellent acid resistance and heat resistance and having a long life.

以下、本発明の一実施形態について添付図面に基づいて説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

本発明の浸漬管は、主に、金属溶解炉に用いられて溶融金属に浸漬される浸漬管である。金属溶解炉１としては、本実施形態では図２に示すような線材Ｗに亜鉛メッキを行うために溶融亜鉛１０を貯留する溶解炉として説明するが、特に限定はされない。 Dip tube of the present invention is mainly a dip tube which is immersed in the molten metal used in the metal melting furnace. In the present embodiment, the metal melting furnace 1 will be described as a melting furnace for storing molten zinc 10 in order to galvanize the wire W as shown in FIG. 2, but is not particularly limited.

浸漬管２は、図１に示すように、半球状をした底部２１と、円筒状をした側面部２２とからなる有底筒状をしたもので、耐酸化性が高いいわゆるファインセラミックで形成される。浸漬管２には、上端開口２３からバーナ４が下方の浸漬管２内に向けて挿入され、浸漬管２の上部に配置される。図２に示す金属溶解炉１においては、５本の浸漬管２を浸漬させており、溶融亜鉛１０中に配設したシンカーローラと金属溶解炉１外に設けたローラとの間に巻回した線材Ｗを送ることで、溶融亜鉛１０に線材Ｗを浸漬させて線材Ｗに亜鉛メッキを行う。   As shown in FIG. 1, the dip tube 2 has a bottomed cylindrical shape composed of a hemispherical bottom portion 21 and a cylindrical side portion 22, and is formed of a so-called fine ceramic having high oxidation resistance. The In the dip tube 2, the burner 4 is inserted into the dip tube 2 below from the upper end opening 23, and disposed on the dip tube 2. In the metal melting furnace 1 shown in FIG. 2, five dip tubes 2 are immersed and wound between a sinker roller disposed in the molten zinc 10 and a roller provided outside the metal melting furnace 1. By sending the wire W, the wire W is immersed in the molten zinc 10 and galvanized on the wire W.

バーナ４は、本実施形態ではリジェネバーナを用いており、リジェネバーナの構成および特徴は従来例に示した通りであるため、詳しい説明を省略する。なお、バーナ４としてはリジェネバーナに限定されないものである。   The burner 4 uses a regenerative burner in the present embodiment, and since the configuration and features of the regenerative burner are as shown in the conventional example, detailed description is omitted. The burner 4 is not limited to the regenerative burner.

リジェネバーナの燃料ガス供給路４１、蓄熱体４３を収容した空気供給路４２、等を備えた本体ボディ４０は、外径が浸漬管２の内径よりも小さい径の円筒状をしており、浸漬管２の上端開口２３から挿入されて浸漬管２の内面との間に隙間３（例えば１０ｍｍの隙間３）をあけた状態で配設される。本体ボディ４０の上端にはフランジ４０ａが形成してあり、浸漬管２の上端から上方に隙間３をあけてフランジ４０ａが位置する位置関係でバーナ４の本体ボティと浸漬管２とを位置固定する。   The main body 40 including the fuel gas supply path 41 of the regenerative burner, the air supply path 42 containing the heat storage body 43, and the like has a cylindrical shape whose outer diameter is smaller than the inner diameter of the dip tube 2 and is immersed. It is inserted from the upper end opening 23 of the tube 2 and disposed with a gap 3 (for example, a gap 3 of 10 mm) between the inner surface of the dip tube 2. A flange 40a is formed at the upper end of the main body 40, and the main body body of the burner 4 and the dip tube 2 are fixed in a positional relationship where the gap 40 is positioned above the upper end of the dip tube 2 with a gap 3 therebetween. .

そして本発明の浸漬管２では、バーナ４の本体ボティと浸漬管２の内面との間の隙間３に、浸漬管２の過熱防止のため、内部に冷却空気流路６０を備えた断熱部材６を設けている。 And in the dip tube 2 of the present invention, the gap 3 between the body Boti and the inner surface of the dip tube 2 of the burner 4, to prevent overheating of the dip tube 2, the heat insulating member having a cooling air flow path 60 in the interior 6 is provided.

断熱部材６は、耐熱性に優れるアルミナ系繊維からなる布状部材にて外筒６１ａ及び内筒６１ｂからなる二重筒６１にて構成され、前記二重筒６１の外筒６１ａと内筒６１ｂとの間の空間を冷却空気流路６０とするもので、外部より冷却空気を冷却空気流路６０に供給する。二重筒６１は、その外筒６１ａが浸漬管２の内面に沿うと共に内筒６１ｂが浸漬管２の外面から距離をあけて配置され、内筒６１ｂと外筒６１ａの下端部が接続してあって冷却空気流路６０の下端部を閉塞してある。二重筒６１の製作にあたっては一枚の布状部材を折り返して二重筒６１状に形成する等、特に限定されない。   The heat insulating member 6 is a cloth-like member made of alumina-based fibers having excellent heat resistance, and is constituted by a double tube 61 made of an outer tube 61a and an inner tube 61b. The outer tube 61a and the inner tube 61b of the double tube 61 The space between the cooling air channel 60 and the cooling air channel 60 is supplied to the cooling air channel 60 from the outside. In the double cylinder 61, the outer cylinder 61a extends along the inner surface of the dip tube 2 and the inner cylinder 61b is arranged at a distance from the outer surface of the dip tube 2, and the lower ends of the inner cylinder 61b and the outer cylinder 61a are connected. Thus, the lower end portion of the cooling air channel 60 is closed. The production of the double cylinder 61 is not particularly limited, for example, a single cloth-like member is folded back to form the double cylinder 61.

外筒６１ａの上端部と内筒６１ｂの上端部との間には隙間３が形成してあり、冷却空気の流入口６２となる。この冷却空気の流入口６２は、上記本体ボティのフランジ４０ａと浸漬管２の上端部の間の隙間３に位置する。   A gap 3 is formed between the upper end portion of the outer cylinder 61a and the upper end portion of the inner cylinder 61b, and serves as an inlet 62 for cooling air. The cooling air inlet 62 is located in the gap 3 between the flange 40 a of the main body body and the upper end of the dip tube 2.

冷却空気の供給手段としては、上記リジェネバーナ４の給気ブロア４５からの給気の一部を冷却空気として冷却空気流路６０に供給することで、別の供給手段としてのブロア等を要することなく、また上記給気ブロア４５の給気量の１〜５％程度を冷却空気として供給すればよいため、給気ブロア４５の容量を上げる必要もなく、コストの増加を抑えることができる。   As cooling air supply means, a part of the supply air from the supply blower 45 of the regenerative burner 4 is supplied as cooling air to the cooling air flow path 60, so that a blower or the like as another supply means is required. In addition, since it is only necessary to supply about 1 to 5% of the air supply amount of the air supply blower 45 as cooling air, it is not necessary to increase the capacity of the air supply blower 45, and an increase in cost can be suppressed.

この二重筒６１は、浸漬管２の内面に沿って浸漬管２の上端開口２３から少なくともメタルライン５の位置まで（好ましくはメタルライン５よりも下側）にかけて配置される。バーナ４の本体ボティは、浸漬管２が溶融金属１０に浸漬された際にメタルライン５の上側（本実施形態ではメタルライン５の１０ｍｍ程度上側）に位置するように浸漬管２内の上部（本体ボティの下端が浸漬管２の上端から約３００ｍｍの位置）に配置され、二重筒６１は、メタルライン５の下側（本実施形態ではメタルライン５の５０ｍｍ（好ましくは３０ｍｍ）程度下側）に位置するように浸漬管２の内面に沿って配置される。   The double cylinder 61 is disposed along the inner surface of the dip tube 2 from the upper end opening 23 of the dip tube 2 to at least the position of the metal line 5 (preferably below the metal line 5). The body body of the burner 4 has an upper part in the dip tube 2 so that it is located above the metal line 5 (in this embodiment, about 10 mm above the metal line 5) when the dip tube 2 is immersed in the molten metal 10. The lower end of the body body is arranged at a position about 300 mm from the upper end of the dip tube 2, and the double cylinder 61 is below the metal line 5 (in this embodiment, about 50 mm (preferably 30 mm) below the metal line 5. ) Is disposed along the inner surface of the dip tube 2 so as to be located in

上記の浸漬管２では、冷却空気を供給手段によって冷却空気流路６０の流入口６２から供給する。冷却空気は、冷却空気流路６０内に充満して浸漬管２が過熱されるのを防止する。そして、冷却空気流路６０内の高温となった冷却空気は後から供給される温度の低い新鮮な冷却空気によって、内筒６１ｂを構成する布状部材の繊維の隙間３から浸漬管２内に排出され、燃焼ガスと共に排出される。これにより、冷却空気流路６０内の空間は、所定の温度以下に保つことができる。 In the above immersion tube 2, it is supplied from the inlet 62 of the cooling air passages 60 cooling air by the supply means. The cooling air is filled in the cooling air channel 60 and prevents the dip tube 2 from being overheated. And the cooling air which became high temperature in the cooling air flow path 60 is in the dip tube 2 from the gap | interval 3 of the fiber of the cloth-like member which comprises the inner cylinder 61b by the fresh cooling air with the low temperature supplied later. It is discharged and discharged together with the combustion gas. Thereby, the space in the cooling air flow path 60 can be kept below a predetermined temperature.

本発明の浸漬管２を採用することで、浸漬管２が過熱されて熱応力によって破損するのを防止することができる。すなわち、浸漬管２の燃焼空間２０内の温度は本実施形態では約９８０℃、溶融金属１０である亜鉛の温度は約４５０℃で、浸漬管２が溶融金属１０に浸漬されている状態では、浸漬管２のメタルライン５の下側は前記約４５０℃の溶融金属１０に晒されると共に、メタルライン５の上側は溶融金属１０は存在せず前記４５０℃よりも低い温度に晒される。このため浸漬管２のメタルライン５より上側の部分はメタルライン５より下側の部分よりも大きな温度差となり、また、外側に溶融金属１０が存在しないため浸漬管２が高温となっても冷却されず、大きな熱応力が発生してしまう。そこで、メタルライン５の上側の部分に冷却空気流路６０を設けることで、このメタルライン５の上側の浸漬管２の内面が高温の燃焼ガスに晒されて、大きな熱応力が発生するのを防止することができる。これにより、耐酸性および耐熱性に優れて寿命の長い浸漬管２とすることができる。また、冷却空気により、冷却空気流路６０の外殻をなす二重筒６１の断熱部材６が冷却されて、断熱部材６のアルミナ系繊維が長時間の高温雰囲気での使用によってガラス化されて劣化するのを防止することができる。 By adopting the dip tube 2 of the present invention, it is possible to prevent the dip tube 2 from being overheated and damaged by thermal stress. That is, in this embodiment, the temperature in the combustion space 20 of the dip tube 2 is about 980 ° C., the temperature of zinc that is the molten metal 10 is about 450 ° C., and the dip tube 2 is immersed in the molten metal 10, The lower side of the metal line 5 of the dip tube 2 is exposed to the molten metal 10 at about 450 ° C., and the upper side of the metal line 5 is exposed to a temperature lower than the 450 ° C. with no molten metal 10 present. For this reason, the portion above the metal line 5 of the dip tube 2 has a larger temperature difference than the portion below the metal line 5, and since the molten metal 10 does not exist on the outside, the dip tube 2 is cooled even when the temperature is high. Not a large thermal stress. Therefore, by providing the cooling air flow path 60 in the upper part of the metal line 5, the inner surface of the dip pipe 2 on the upper side of the metal line 5 is exposed to high-temperature combustion gas, and a large thermal stress is generated. Can be prevented. Thereby, it can be set as the dip tube 2 which is excellent in acid resistance and heat resistance, and has a long lifetime. Moreover, the heat insulation member 6 of the double cylinder 61 which forms the outer shell of the cooling air flow path 60 is cooled by the cooling air, and the alumina fiber of the heat insulation member 6 is vitrified by use in a high temperature atmosphere for a long time. Deterioration can be prevented.

また、本実施形態のようにバーナ４にリジェネバーナを用いたものにあっては、リジェネバーナは交番燃焼するため温度分布が頻繁に変化して、熱応力が発生し易いため、本発明の浸漬管２を採用することで、上述した効果がより顕著に得られる。 Further, in the case where the regenerative burner is used for the burner 4 as in the present embodiment, the regenerative burner undergoes alternating combustion, so that the temperature distribution is frequently changed and thermal stress is likely to occur. By adopting the tube 2 , the above-described effects can be obtained more remarkably.

図３に断熱部材６の他例を示す。この図３に示す例では、断熱部材６の流入口６２から冷却空気流路６０の上端部に平面視環状をしたヘッダ７を挿入して配置し、ヘッダ７の下面に下方の冷却空気流路６０に向けて空気を吐出するスリット７１を設けたことを特徴とするものである。   FIG. 3 shows another example of the heat insulating member 6. In the example shown in FIG. 3, a header 7 having an annular shape in plan view is inserted and arranged from the inlet 62 of the heat insulating member 6 to the upper end of the cooling air channel 60, and the lower cooling air channel is disposed on the lower surface of the header 7. The slit 71 which discharges air toward 60 is provided.

これにより、断熱部材６の冷却空気流路６０内に流入させる冷却空気を冷却空気流路６０の下方に向けて吐出することができて、冷却空気流路６０全体にわたって冷却空気を万遍なく行き渡らせることができて、確実に冷却を行うことができる。   As a result, the cooling air that flows into the cooling air flow path 60 of the heat insulating member 6 can be discharged toward the lower side of the cooling air flow path 60, and the cooling air is uniformly distributed throughout the cooling air flow path 60. Therefore, cooling can be performed reliably.

図４に断熱部材６の更に他例を示す。この図４に示す例では、図３に示す上例のように断熱部材６の流入口６２から冷却空気流路６０の一端側（上端部）に平面視環状をしたヘッダ７を挿入して配置するのに加えて、ヘッダ７から下方の冷却空気流路６０の他端側（下端部）に向けて空気を搬送する送気管７２を設けたことを特徴とするものである。送気管７２は、ＳＵＳ３１０やＳＵＳ３０４等のＳＵＳ材で構成される円管等で、平面視において環状をしたヘッダ７の周方向に複数箇所（４〜８箇所）から下方に垂下されている。送気管７２の先端は冷却空気流路６０の下端付近にまで伸びており、浸漬管の内側の面に上下にわたって噴出孔７３が多数設けてある。   FIG. 4 shows still another example of the heat insulating member 6. In the example shown in FIG. 4, the header 7 having an annular shape in plan view is inserted and arranged from the inlet 62 of the heat insulating member 6 to one end side (upper end portion) of the cooling air flow channel 60 as in the above example shown in FIG. In addition, an air supply pipe 72 that conveys air from the header 7 toward the other end side (lower end portion) of the cooling air flow path 60 below is provided. The air supply pipe 72 is a circular pipe or the like made of a SUS material such as SUS310 or SUS304, and is suspended downward from a plurality of locations (4 to 8 locations) in the circumferential direction of the header 7 that is annular in plan view. The front end of the air supply pipe 72 extends to the vicinity of the lower end of the cooling air flow path 60, and a number of ejection holes 73 are provided on the inner surface of the dip pipe in the vertical direction.

これにより、断熱部材６の冷却空気流路６０内に流入させる冷却空気を冷却空気流路６０の下方に向けて搬送すると冷却空気流路６０の上下にわたって冷却空気を噴出孔７３より噴出することができて、より一層、冷却空気流路６０全体にわたって冷却空気を万遍なく行き渡らせることができて、確実に冷却を行うことができる。   As a result, when the cooling air that flows into the cooling air channel 60 of the heat insulating member 6 is conveyed downward of the cooling air channel 60, the cooling air can be ejected from the ejection holes 73 over the upper and lower sides of the cooling air channel 60. Thus, the cooling air can be distributed evenly throughout the cooling air flow path 60, and cooling can be performed reliably.

本発明の一実施形態の断面図である。It is sectional drawing of one Embodiment of this invention. 金属溶解炉を示し、（ａ）は側断面図であり、（ｂ）は平面図である。A metal melting furnace is shown, (a) is a sectional side view, (b) is a plan view. 同上の他の実施例の断熱部材の断面図である。It is sectional drawing of the heat insulation member of the other Example same as the above. 同上の更に他の実施例の断熱部材の断面図である。It is sectional drawing of the heat insulation member of further another Example same as the above. 従来の浸漬管の断面図である。It is sectional drawing of the conventional dip tube.

符号の説明Explanation of symbols

１ 金属溶解炉
２ 浸漬管
２０ 燃焼空間
２１ 底部
２２ 側面部
２３ 上端開口
３ 隙間
４ バーナ
４０ 本体ボディ
４０ａ フランジ
４１ 燃料ガス供給路
４２ 空気供給路
４３ 蓄熱体
４４ 四方弁
４５ 給気ブロア
４６ 排気ブロア
５ メタルライン
６ 断熱部材
６１ 二重筒
６１ａ 外筒
６１ｂ 内筒
６２ 流入口
６０ 冷却空気流路
Ｗ 線材
１０ 溶融金属（亜鉛） DESCRIPTION OF SYMBOLS 1 Metal melting furnace 2 Immersion pipe 20 Combustion space 21 Bottom part 22 Side part 23 Upper end opening 3 Crevice 4 Burner 40 Main body 40a Flange 41 Fuel gas supply path 42 Air supply path 43 Heat storage body 44 Four-way valve 45 Supply blower 46 Exhaust blower 5 Metal line 6 Heat insulation member 61 Double cylinder 61a Outer cylinder 61b Inner cylinder 62 Inlet 60 Cooling air flow path W Wire material 10 Molten metal (zinc)

Claims (2)

金属溶解炉にて溶融金属に浸漬される浸漬管であって、浸漬管を有底筒状をしたセラミックで形成すると共に内部を燃焼空間とし、浸漬管の上部に浸漬管の内面との間に隙間をあけてバーナを配設し、浸漬管の上端部から少なくとも浸漬管を溶融金属に浸漬した時のメタルラインの位置にかけて前記浸漬管の内面とバーナとの間の隙間に、内部に冷却空気流路を備えた布状部材で構成され前記冷却空気流路を流れる冷却空気を前記布状部材の繊維の隙間から前記浸漬管内に排出可能とし、前記冷却空気により冷却される断熱部材を設けて成ることを特徴とする浸漬管。 A dip tube which is immersed in the molten metal in metallic melting furnace, the interior and the combustion space to form a dip tube with a ceramic in which the bottomed cylindrical, between the inner surface of the dip tube to the top of the dip tube A burner is provided with a gap in between, and the interior is cooled to the gap between the inner surface of the dip tube and the burner from the upper end of the dip tube to the position of the metal line when at least the dip tube is immersed in molten metal. A heat insulating member that is configured by a cloth-like member having an air flow path and that can discharge the cooling air flowing through the cooling air flow path into the dip pipe through a gap between the fibers of the cloth-like member and is cooled by the cooling air is provided. The dip tube characterized by comprising. 断熱部材の冷却空気流路内に、冷却空気を冷却空気流路の一端側から他端側にかけて略均等に噴出する噴出孔を形成した送気管を設けて成ることを特徴とする請求項１記載の浸漬管。 2. An air supply pipe having an ejection hole for ejecting cooling air substantially uniformly from one end side to the other end side of the cooling air flow path is provided in the cooling air flow path of the heat insulating member. Dip tube .
JP2007092367A 2007-03-30 2007-03-30 Dip tube Active JP5155584B2 (en)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN101443256B (en) * 2006-05-16 2013-04-24 特雷克斯-德马格有限公司 Telescopic crane boom

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Publication number Priority date Publication date Assignee Title
JPS6149986A (en) * 1984-08-17 1986-03-12 東京瓦斯株式会社 Non-ferrous molten metal holder
JPH063291B2 (en) * 1988-05-27 1994-01-12 東邦瓦斯株式会社 Pulse combustion type immersion burner
JPH0616259Y2 (en) * 1988-08-23 1994-04-27 株式会社日本高熱工業社 Molten metal heating device
JP2754171B2 (en) * 1994-10-17 1998-05-20 工業技術院長 Submerged combustion burner
JP2000121250A (en) * 1998-10-15 2000-04-28 Osaka Gas Co Ltd Immersion pipe type liquid heating device
JP2001108207A (en) * 1999-10-04 2001-04-20 Sanken Sangyo Co Ltd Immersion tube burner
JP2001182912A (en) * 1999-12-24 2001-07-06 Toshiba Ceramics Co Ltd Triple layered single ended radiant tube and method of heating therewith

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101443256B (en) * 2006-05-16 2013-04-24 特雷克斯-德马格有限公司 Telescopic crane boom

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