JP5495534B2 - Impeller for stirring desulfurization equipment - Google Patents
Impeller for stirring desulfurization equipment Download PDFInfo
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- JP5495534B2 JP5495534B2 JP2008288820A JP2008288820A JP5495534B2 JP 5495534 B2 JP5495534 B2 JP 5495534B2 JP 2008288820 A JP2008288820 A JP 2008288820A JP 2008288820 A JP2008288820 A JP 2008288820A JP 5495534 B2 JP5495534 B2 JP 5495534B2
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- 238000003756 stirring Methods 0.000 title claims description 24
- 238000006477 desulfuration reaction Methods 0.000 title claims description 23
- 230000023556 desulfurization Effects 0.000 title claims description 23
- 230000002093 peripheral effect Effects 0.000 claims description 48
- 238000001816 cooling Methods 0.000 claims description 35
- 238000004804 winding Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 description 23
- 239000010959 steel Substances 0.000 description 23
- 230000000694 effects Effects 0.000 description 17
- 239000002184 metal Substances 0.000 description 16
- 230000003009 desulfurizing effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Description
本発明は、溶銑の脱硫に用いられる攪拌式脱硫装置用のインペラに関するものであり、具体的には、インペラの冷却構造に関するものである。 The present invention relates to an impeller for a stirring type desulfurization apparatus used for desulfurization of hot metal, and specifically relates to a cooling structure for an impeller.
従来、溶銑が入れられた取鍋に脱硫剤を投入するとともに該取鍋内の溶銑にインペラを浸漬させ、該インペラを回転させることにより溶銑と脱硫剤を攪拌混合し、溶銑の脱硫を行う機械攪拌式脱硫装置が知られている（特許文献1参照。）。 Conventionally, a desulfurizing agent is introduced into a ladle containing hot metal, and the impeller is immersed in the hot metal in the ladle, and the impeller is rotated to stir and mix the hot metal and the desulfurizing agent, thereby desulfurizing the hot metal. A stirring-type desulfurization apparatus is known (see Patent Document 1).
図１は、機械攪拌式脱硫装置に用いられる従来のインペラの一例を示すものである。
図1に示すインペラ１は、回転軸２及び該回転軸２の先端に設けられた攪拌翼３から構成されており、それらの表面には、高温の溶銑によるインペラの溶損を防ぐため、耐火物４が被覆されている。
ところで、インペラ１は、溶銑への浸漬と待機が一日の内に頻繁に繰り返されるものであり、大きな熱衝撃を受け耐火物４が剥離し易いものである。
そこで、従来、耐火物の剥離を抑止し、インペラの寿命を向上させるため、図２に示すようにインペラ内部を空気で冷却することが行われている。
FIG. 1 shows an example of a conventional impeller used in a mechanical stirring desulfurization apparatus.
The impeller 1 shown in FIG. 1 is composed of a rotating shaft 2 and a stirring blade 3 provided at the tip of the rotating shaft 2, and the surface of the impeller 1 is refractory to prevent the impeller from being damaged by high-temperature hot metal. Object 4 is coated.
By the way, the impeller 1 is such that immersion in the hot metal and standby are frequently repeated within a day, and the refractory 4 is easily peeled off due to a large thermal shock.
Therefore, conventionally, in order to suppress the separation of the refractory and improve the life of the impeller, the inside of the impeller is cooled with air as shown in FIG.
図２は、このようなインペラの冷却構造を示すものである。
インペラ１の回転軸２は、先端に攪拌翼３が設けられた外筒５と該外筒５内に同心状に隙間を空けて配置された内筒６の二重筒構造で構成されている。
図示のとおり、冷却用の空気は、上部から内筒６内に供給され、該内筒６の下端開口を経て外筒５との隙間を、外筒５及び耐火物４を冷却しながら上昇し、該外筒５上部に設けられた開口８から外部に放出される。
The rotating shaft 2 of the impeller 1 has a double cylinder structure of an outer cylinder 5 provided with a stirring blade 3 at the tip and an inner cylinder 6 disposed concentrically within the outer cylinder 5. .
As shown in the figure, cooling air is supplied into the inner cylinder 6 from above, and rises through the lower end opening of the inner cylinder 6 through the gap with the outer cylinder 5 while cooling the outer cylinder 5 and the refractory 4. , It is discharged to the outside through an opening 8 provided in the upper part of the outer cylinder 5.
図２に示すインペラの冷却構造は、溶銑によるインペラの温度上昇を抑制するものであり、一定の効果が認められるものである。
しかしながら、その冷却効果は、インペラの寿命を向上させる上において十分なものでなく、更なる改良の余地がある。
The impeller cooling structure shown in FIG. 2 suppresses the temperature rise of the impeller due to hot metal, and a certain effect is recognized.
However, the cooling effect is not sufficient for improving the life of the impeller, and there is room for further improvement.
そこで、本発明は、従来に比べ効果の高い冷却構造をもつ攪拌式脱硫装置のインペラを提供することを目的とする。 Then, an object of this invention is to provide the impeller of the stirring type desulfurization apparatus which has a cooling structure with a high effect compared with the past.
前記目的を達成するため、請求項１に係る発明は、回転軸１２が、先端に攪拌翼１３が設けられた外筒１５と該外筒１５内に隙間を空けて配置された内筒１６の二重筒構造からなり、該外筒１５及び攪拌翼１３の外表面が耐火物１４によって被覆される攪拌式脱硫装置用のインペラ１１であって、冷却用の空気が、上部から内筒１６内に供給され、該内筒１６の下端開口を経て外筒１５との隙間を上昇し、該外筒１５上部に設けられた開口１８から外部に放出される攪拌式脱硫装置用のインペラにおいて、内筒１６の外周面または外筒１５の内周面に螺旋状の凸部を形成し、前記螺旋状の凸部は、内筒１６の外周面または外筒（１５）の内周面に棒鋼１７をインペラの基端部から先端部に向けてインペラの回転 方向と同方向に螺旋状に巻きつけることにより形成されることを特徴とする。
In order to achieve the above object, the invention according to claim 1 includes a rotating shaft 12 having an outer cylinder 15 provided with a stirring blade 13 at the tip thereof and an inner cylinder 16 disposed with a gap in the outer cylinder 15. An impeller 11 for a stirring type desulfurization apparatus having a double cylinder structure, in which outer surfaces of the outer cylinder 15 and the stirring blade 13 are covered with a refractory 14, and cooling air is introduced into the inner cylinder 16 from above. In the impeller for the agitation desulfurization apparatus, the gap between the inner cylinder 16 and the outer cylinder 15 rises through the lower end opening of the inner cylinder 16 and is discharged to the outside through the opening 18 provided in the upper portion of the outer cylinder 15. A spiral convex portion is formed on the outer peripheral surface of the cylinder 16 or the inner peripheral surface of the outer cylinder 15, and the spiral convex portion is a steel bar 17 on the outer peripheral surface of the inner cylinder 16 or the inner peripheral surface of the outer cylinder (15). One spirally wound in the same direction as the rotational direction of the impeller toward the distal end from the proximal end of the impeller Characterized in that it is formed by Rukoto.
請求項２に係る発明は、回転軸１２が、先端に攪拌翼１３が設けられた外筒１５と該外筒１５内に隙間を空けて配置された内筒１６の二重筒構造からなり、該外筒１５及び攪拌翼１３の外表面が耐火物１４によって被覆される攪拌式脱硫装置用のインペラ１１であって、冷却用の空気が、上部から内筒１６内に供給され、該内筒１６の下端開口を経て外筒１５との隙間を上昇し、該外筒１５上部に設けられた開口１８から外部に放出される攪拌式脱硫装置用のインペラにおいて、内筒１６の外周面または外筒１５の内周面に螺旋状の凸部を形成し、前記螺旋状の凸部は、内筒１６の外周面または外筒（１５）の内周面に棒鋼１７をインペラの基端部から先端部に向けてインペラの回転方向と逆方向に螺旋状に巻きつけることにより形成されることを特徴とする。
In the invention according to claim 2, the rotating shaft 12 has a double cylinder structure of an outer cylinder 15 provided with a stirring blade 13 at the tip and an inner cylinder 16 arranged with a gap in the outer cylinder 15, An impeller 11 for a stirring-type desulfurization apparatus in which outer surfaces of the outer cylinder 15 and the stirring blade 13 are covered with a refractory 14, and cooling air is supplied into the inner cylinder 16 from above, and the inner cylinder In the impeller for the agitation-type desulfurization apparatus that is released to the outside through the opening 18 provided at the upper portion of the outer cylinder 15 through the lower end opening of the outer cylinder 15, A spiral convex portion is formed on the inner peripheral surface of the cylinder 15, and the spiral convex portion is formed by attaching the steel bar 17 to the outer peripheral surface of the inner cylinder 16 or the inner peripheral surface of the outer cylinder (15) from the base end portion of the impeller. It is formed by winding spirally in a direction opposite to the rotation direction of the impeller toward the tip And wherein the door.
請求項１に係る発明のインペラは、内筒１６の外周面または外筒１５の内周面に棒鋼を インペラの基端部から先端部に向けてインペラの回転方向と同方向に螺旋状に巻付けて凸部を形成することで、螺旋状の凸部が形成されていない従来のインペラと比較して、冷却用空気の流路となる両者の隙間断面積が小さくなり、該隙間を上昇する冷却用空気の流速を速くすることができ抜熱効果が向上する。そして、冷却用空気が螺旋状の凸部に沿って流れることで、インペラの全面を万遍なく冷却することができ、冷却効果が非常に高いものとなる。また螺旋状の凸部が、耐火物を介して溶銑の熱の影響を直接受ける外筒１５の内周面に形成される場合は、該凸部が放熱フィンの役割を果たすため、より一層冷却効果の高いものとなり、螺旋状の凸部を内筒１６の外周面に棒鋼１７を螺旋状に巻きつけることにより形成する場合は、内筒１６の外周面に容易に螺旋状の凸部を形成することができる。
In the impeller according to the first aspect of the present invention, a steel bar is spirally wound around the outer peripheral surface of the inner cylinder 16 or the inner peripheral surface of the outer cylinder 15 in the same direction as the impeller rotation direction from the base end portion of the impeller toward the tip end portion . As a result of forming the protrusions, the gap cross-sectional area of both of the cooling air flow paths becomes smaller and the gap increases as compared with the conventional impeller in which the spiral protrusions are not formed. The flow rate of the cooling air can be increased, and the heat removal effect is improved. And since the cooling air flows along the spiral convex portion, the entire surface of the impeller can be uniformly cooled, and the cooling effect becomes very high. Further, when the spiral convex portion is formed on the inner peripheral surface of the outer cylinder 15 that is directly affected by the heat of the hot metal via the refractory, the convex portion serves as a heat radiating fin, so that the cooling is further improved. When the spiral protrusion is formed by spirally winding the steel bar 17 around the outer peripheral surface of the inner cylinder 16, the spiral protrusion is easily formed on the outer peripheral surface of the inner cylinder 16. can do.
請求項２に係る発明のインペラは、内筒１６の外周面または外筒１５の内周面に棒鋼をThe impeller of the invention according to claim 2 is made of steel bar on the outer peripheral surface of the inner cylinder 16 or the inner peripheral surface of the outer cylinder 15.
インペラの基端部から先端部に向けてインペラの回転方向と逆方向に螺旋状に巻付けて凸Convex spirally wound in the direction opposite to the impeller rotation direction from the base end of the impeller toward the tip
部を形成することで、内外筒間を通る冷却用空気の流れが乱れ、乱流化して冷却効果が向By forming the part, the flow of cooling air passing between the inner and outer cylinders is disturbed, and the cooling effect is improved by turbulent flow.
上する。そして、冷却用空気が螺旋状の凸部に沿って流れることで、インペラの全面を万I will go up. Then, the cooling air flows along the spiral convex portion, so that the entire surface of the impeller is fully covered.
遍なく冷却することができ、冷却効果が非常に高いものとなる。また螺旋状の凸部が、耐It can cool uniformly, and the cooling effect becomes very high. In addition, the spiral convex part
火物を介して溶銑の熱の影響を直接受ける外筒１５の内周面に形成される場合は、該凸部When formed on the inner peripheral surface of the outer cylinder 15 that is directly affected by the heat of the hot metal via a fire, the convex portion
が放熱フィンの役割を果たすため、より一層冷却効果の高いものとなり、螺旋状の凸部をSince it plays the role of a heat radiating fin, the cooling effect becomes even higher, and the spiral convex part
内筒１６の外周面に棒鋼１７を螺旋状に巻きつけることにより形成する場合は、内筒１６When forming the steel bar 17 by spirally winding it on the outer peripheral surface of the inner cylinder 16, the inner cylinder 16
の外周面に容易に螺旋状の凸部を形成することができる。It is possible to easily form a spiral convex portion on the outer peripheral surface.
本発明の実施の形態を図面に基づいて説明する。 Embodiments of the present invention will be described with reference to the drawings.
図３は、攪拌式脱硫装置の攪拌機を示すものである。
攪拌機２０は、当該攪拌機２０を昇降可能に支持するデッキ２４先端部に連結される筒体２６と、筒体２６の軸心に配置され上下のベアリングにより筒体２６に回転可能に支持される駆動軸２８と、駆動軸２８下端にカップリング４０を介して着脱可能に取り付けられるインペラ１１と、デッキ２４上に固定されるモータ及び該モータと駆動軸２８を連結する歯車伝動機構よりなる駆動軸回転手段３８とを有している。
そして、脱硫時には、溶銑が入れられた取鍋３０に脱硫剤を投入するとともに該取鍋内の溶銑にインペラ１１を浸漬させ、該インペラ１１を回転させることにより溶銑と脱硫剤を攪拌混合し、溶銑の脱硫を行う。
FIG. 3 shows a stirrer of a stirring type desulfurization apparatus.
The stirrer 20 is a cylinder 26 connected to the tip of the deck 24 that supports the stirrer 20 so that it can be moved up and down, and a drive that is disposed on the axis of the cylinder 26 and is rotatably supported by the cylinder 26 by upper and lower bearings. Drive shaft rotation comprising a shaft 28, an impeller 11 that is detachably attached to the lower end of the drive shaft 28 via a coupling 40, a motor fixed on the deck 24, and a gear transmission mechanism that connects the motor and the drive shaft 28. Means 38.
At the time of desulfurization, the desulfurizing agent is put into the ladle 30 containing the hot metal, the impeller 11 is immersed in the hot metal in the ladle, and the impeller 11 is rotated to stir and mix the hot metal and the desulfurizing agent Perform desulfurization of hot metal.
図示しない脱硫装置の本体には、インペラ１１の上方で取鍋３０の上部を覆う位置に耐火物で被覆された防塵カバー２２が取り付けられており、排気ダクトを通して脱硫時に発生した粉塵を捕集するものとなっている。ここで、防塵カバー２２の内周側には、耐火物で被覆される防熱カバー２３が垂下されている。
また、インペラ１１の回転軸１２上部位置には、耐火物で被覆された防熱カバー２１が設けられている。当該防熱カバー２１は、インペラ１１交換時の支持部を兼ねることができるものである。
そして、駆動軸２８下端にインペラ１１を着脱可能に取り付けるカップリング４０や、該カップリング４０の直上に配置されたベアリングは、インペラ１１の回転軸１２上部位置に設けられる防熱カバー２１と、上記防塵カバー２２の内周側に垂下され耐火物で被覆される防熱カバー２３とに覆われて、取鍋３０の輻射熱から保護される構成となっている。
A dust-proof cover 22 covered with a refractory is attached to the body of the desulfurization apparatus (not shown) at a position covering the upper portion of the ladle 30 above the impeller 11 and collects dust generated during desulfurization through an exhaust duct. It has become a thing. Here, on the inner peripheral side of the dust-proof cover 22, a heat-proof cover 23 covered with a refractory is suspended.
Further, a heat insulating cover 21 covered with a refractory is provided at the upper position of the rotating shaft 12 of the impeller 11. The heat insulating cover 21 can also serve as a support portion when the impeller 11 is replaced.
And the coupling 40 which attaches the impeller 11 to the drive shaft 28 lower end detachably, and the bearing arrange | positioned just above this coupling 40 are the heat-insulation cover 21 provided in the rotating shaft 12 upper part position of the impeller 11, and the said dust-proof. It is configured to be protected from the radiant heat of the ladle 30 by being covered with a heat insulating cover 23 that is suspended on the inner peripheral side of the cover 22 and covered with a refractory.
図４は、本発明の実施の形態におけるインペラの構造を示すもので、図５（ａ）は、図４に示されたインペラ１１の内筒１６の正面図、図５（ｂ）は、図５（ａ）のＢ−Ｂ断面を示すものである。
本発明の実施の形態におけるインペラ１１の基本的な構造は、図２に示す従来のものと同様であり、インペラ１１の回転軸１２は、先端に攪拌翼１３が設けられた外筒１５と該外筒１５内に同軸上に隙間を空けて配置された内筒１６の二重筒構造で構成されており、図４に示すとおり、図示しない圧縮空気源から供給された冷却用の空気が、内筒１６内に上部から供給され、該内筒１６の下端開口を経て外筒１５との隙間を、内筒１６、外筒１５及び耐火物１４を冷却しながら上昇し、該外筒１５上部に設けられた開口１８から外部に放出されるものである。
そして、本発明の実施の形態におけるインペラ１１は、前記内筒１６の外周面または外筒１５の内周面に螺旋状の凸部を形成したものであり、図４及び図５は、その一例として、内筒１６の外周面に二本の棒鋼１７を螺旋状に巻きつけて凸部を形成したものを示すものである。
図４に示すとおり、本発明の実施形態におけるインペラ１１は、内筒１６の外周面に二本の棒鋼１７を螺旋状に巻きつけることによって、図２に示す従来のインペラ１に比べ、内筒１６と外筒１６の隙間面積を小さくするものである。
これにより、当該内筒１６と外筒１６の隙間を上昇する冷却用空気は流速が速くなり、従来のインペラに比べ、抜熱効果が向上する。また、本発明の実施の形態のインペラは、冷却用空気が螺旋状に巻きつけられた棒鋼１７に沿って流れることで、インペラの全面を万遍なく冷却することができ、冷却効果が非常に高いものである。
4 shows the structure of the impeller according to the embodiment of the present invention. FIG. 5 (a) is a front view of the inner cylinder 16 of the impeller 11 shown in FIG. 4, and FIG. FIG. 5B shows a BB cross section of FIG.
The basic structure of the impeller 11 in the embodiment of the present invention is the same as that of the conventional one shown in FIG. 2, and the rotating shaft 12 of the impeller 11 includes an outer cylinder 15 provided with a stirring blade 13 at the tip and the outer cylinder 15. It is composed of a double cylinder structure of an inner cylinder 16 disposed coaxially within the outer cylinder 15 and, as shown in FIG. 4, cooling air supplied from a compressed air source (not shown) The inner cylinder 16 is supplied from the upper part, and rises through the lower end opening of the inner cylinder 16 while cooling the inner cylinder 16, the outer cylinder 15 and the refractory 14, and the upper part of the outer cylinder 15. It is discharged to the outside from the opening 18 provided in.
And the impeller 11 in embodiment of this invention forms the helical convex part in the outer peripheral surface of the said inner cylinder 16, or the inner peripheral surface of the outer cylinder 15, FIG.4 and FIG.5 is the example. As shown, the two steel bars 17 are spirally wound around the outer peripheral surface of the inner cylinder 16 to form a convex portion.
As shown in FIG. 4, the impeller 11 according to the embodiment of the present invention has an inner cylinder compared with the conventional impeller 1 shown in FIG. 2 by spirally winding two steel bars 17 around the outer peripheral surface of the inner cylinder 16. The gap area between the outer cylinder 16 and the outer cylinder 16 is reduced.
Thereby, the cooling air that rises through the gap between the inner cylinder 16 and the outer cylinder 16 has a higher flow velocity, and the heat removal effect is improved as compared with the conventional impeller. Further, the impeller according to the embodiment of the present invention can cool the entire surface of the impeller evenly by flowing the cooling air along the steel bar 17 wound spirally, and the cooling effect is extremely high. It is expensive.
螺旋状の凸部は、内筒１６の外周面に形成されていてもよいし、外筒１５の内周面に形成されていてもよい。
また、凸部は、内筒１６または外筒１５に棒鋼１７を巻きつけて形成するものでもよいし、内筒１６の外周面または外筒１５の内周面に一体に形成されるものでもよい。
凸部を、内筒１６または外筒１５に棒鋼１７を巻きつけて形成する場合、該棒鋼１７は、内筒１６または外筒１５に溶接により固定される。
棒鋼１７は、断面が円形、四角形、六角形等、任意のものを使用できる。
凸部の螺旋方向は、任意に設定できるが、インペラの基端部（駆動軸との連結部側）から先端部に向けて回転方向と同方向になるよう設定すれば、冷却用空気の流速がより一層速くなり、冷却効果の向上に寄与する。また、凸部の螺旋方向をインペラの基端部から先端部に向けて回転方向と逆方向になるよう設定すれば、冷却用空気の流れが乱れ、乱流化する結果、冷却効果が向上する。
なお、耐火物１４を介して溶銑の熱の影響を直接受ける外筒１５の内周面に螺旋状の凸部１７が形成されるものとした場合は、該凸部が放熱フィンの役割を果たし、より一層冷却効果が高いものとなる。
The spiral convex portion may be formed on the outer peripheral surface of the inner cylinder 16, or may be formed on the inner peripheral surface of the outer cylinder 15.
Further, the convex portion may be formed by winding the steel bar 17 around the inner cylinder 16 or the outer cylinder 15, or may be formed integrally with the outer peripheral surface of the inner cylinder 16 or the inner peripheral surface of the outer cylinder 15. .
When the convex portion is formed by winding a steel bar 17 around the inner cylinder 16 or the outer cylinder 15, the steel bar 17 is fixed to the inner cylinder 16 or the outer cylinder 15 by welding.
The bar steel 17 may be any member having a circular cross section, a square shape, a hexagonal shape, or the like.
The spiral direction of the convex part can be set arbitrarily, but if it is set so as to be in the same direction as the rotation direction from the base end part of the impeller (the connecting part side to the drive shaft) toward the tip part, the flow velocity of the cooling air Becomes faster and contributes to the improvement of the cooling effect. Further, if the spiral direction of the convex portion is set to be opposite to the rotation direction from the base end portion of the impeller toward the tip end portion, the flow of cooling air is disturbed and becomes turbulent, resulting in an improved cooling effect. .
In addition, when the helical convex part 17 shall be formed in the internal peripheral surface of the outer cylinder 15 which receives the influence of the heat of a hot metal directly via the refractory 14, this convex part will play the role of a radiation fin. Further, the cooling effect becomes higher.
図４は、本発明の実施例１におけるインペラの構造を示すもので、内筒１６の外周面に二本の棒鋼１７を螺旋状に巻きつけた状態を示すものである。
内筒１６の外周面に螺旋状に巻きつける棒鋼１７は、一本でも、あるいは複数本でも構わない。
FIG. 4 shows the structure of the impeller in the first embodiment of the present invention, and shows a state in which two steel bars 17 are spirally wound around the outer peripheral surface of the inner cylinder 16.
One or a plurality of steel bars 17 wound spirally around the outer peripheral surface of the inner cylinder 16 may be used.
内筒１６の外周面に棒鋼１７を螺旋状に巻きつけるものであれば、内筒１６の外周面に容易に螺旋状の凸部を形成することができる。
また、内筒１６の外周面に複数本の棒鋼１７を螺旋状に巻きつけるものであれば、内筒の外周面に棒鋼を一本巻きつけるものに比べ、冷却用空気の流路となる内筒と外筒の隙間の断面積をより小さくすることができ、冷却効果を向上させることができる。
なお、内筒１６の外周面に棒鋼１７を螺旋状に巻きつけることに代えて、内筒１６の外周面に螺旋状の凸部を一体に形成しても冷却効果が向上することはいうまでもない。
As long as the steel bar 17 is spirally wound around the outer peripheral surface of the inner cylinder 16, a spiral convex portion can be easily formed on the outer peripheral surface of the inner cylinder 16.
Further, if a plurality of steel bars 17 are spirally wound around the outer peripheral surface of the inner cylinder 16, the inner airflow passage for cooling air can be used as compared with the case where a single steel bar is wound around the outer peripheral surface of the inner cylinder. The cross-sectional area of the gap between the cylinder and the outer cylinder can be further reduced, and the cooling effect can be improved.
It goes without saying that the cooling effect is improved even if the spiral protrusion is integrally formed on the outer peripheral surface of the inner cylinder 16 instead of spirally winding the steel bar 17 around the outer peripheral surface of the inner cylinder 16. Nor.
本発明の実施例２におけるインペラは、外筒の内周面に棒鋼を螺旋状に沿わせてなるものである。
外筒の内周面に螺旋状に沿わせる棒鋼は、一本でも、あるいは複数本でも構わない。
The impeller according to the second embodiment of the present invention is formed by spiraling steel bars along the inner peripheral surface of the outer cylinder.
There may be one steel bar or a plurality of steel bars that spiral along the inner peripheral surface of the outer cylinder.
外筒の内周面に螺旋状の凸部を形成する場合は、外筒が耐火物を介して溶銑の熱の影響を直接受けるものであることから、内筒の外周面に螺旋状の凸部を形成する場合と同様の効果を奏するのに加え、該凸部が放熱フィンの役割を果たしより一層冷却効果が高いものとなる。 When forming the spiral convex portion on the inner peripheral surface of the outer cylinder, the outer cylinder is directly affected by the heat of the hot metal via the refractory, so that the spiral convexity is formed on the outer peripheral surface of the inner cylinder. In addition to producing the same effect as in the case of forming the portion, the convex portion plays the role of a heat radiating fin, and the cooling effect is further enhanced.
本発明は、攪拌式脱硫装置に用いられるインペラの寿命を向上させる上において好適である。 The present invention is suitable for improving the service life of an impeller used in a stirring desulfurization apparatus.
１，１１・・・インペラ
２，１２・・・回転軸
３，１３・・・攪拌翼
４，１４・・・耐火物
５，１５・・・外筒
６，１６・・・内筒
１７・・・棒鋼
２０・・・攪拌機
２１・・・防熱カバー
２２・・・防塵カバー
２３・・・防熱カバー
２４・・・デッキ
２６・・・筒体
２７・・・ベアリング
２８・・・駆動軸
３０・・・取鍋
３８・・・モータ
３９・・・歯車伝動機構
４０・・・カップリング
DESCRIPTION OF SYMBOLS 1,11 ... Impeller 2,12 ... Rotary shaft 3,13 ... Stirring blade 4,14 ... Refractory material 5,15 ... Outer cylinder 6,16 ... Inner cylinder 17 ... Steel bar 20 ... Stirrer 21 ... Heat-proof cover 22 ... Dust-proof cover 23 ... Heat-proof cover 24 ... Deck 26 ... Cylindrical body 27 ... Bearing 28 ... Drive shaft 30 ...・ Ladle 38 ... motor 39 ... gear transmission mechanism 40 ... coupling
Claims (2)
内筒（１６）の外周面または外筒（１５）の内周面に螺旋状の凸部を形成し、前記螺旋状の凸部は、内筒（１６）の外周面または外筒（１５）の内周面に棒鋼（１７）をインペ ラの基端部から先端部に向けてインペラの回転方向と同方向に螺旋状に巻きつけることにより形成されることを特徴とする攪拌式脱硫装置用のインペラ。The rotating shaft (12) has a double cylinder structure of an outer cylinder (15) provided with a stirring blade (13) at the tip and an inner cylinder (16) arranged with a gap in the outer cylinder (15). The impeller (11) for the stirring type desulfurization apparatus in which the outer surfaces of the outer cylinder (15) and the stirring blade (13) are covered with the refractory (14), and the cooling air flows from the upper side to the inner side. It is supplied into the cylinder (16), passes through the lower end opening of the inner cylinder (16), rises to the gap with the outer cylinder (15), and passes through the opening (18) provided on the upper part of the outer cylinder (15) to the outside. In the impeller for the stirred desulfurization device to be released,
A spiral convex portion is formed on the outer peripheral surface of the inner cylinder (16) or the inner peripheral surface of the outer cylinder (15), and the spiral convex portion is the outer peripheral surface of the inner cylinder (16) or the outer cylinder (15). for stirring desulfurization apparatus characterized by toward the distal end portion of the bars (17) from the base end portion of the impeller La is formed by winding spirally in the same direction as the rotational direction of the impeller on the inner peripheral surface of the Impeller.
内筒（１６）の外周面または外筒（１５）の内周面に螺旋状の凸部を形成し、前記螺旋状の凸部は、内筒（１６）の外周面または外筒（１５）の内周面に棒鋼（１７）をインペ ラの基端部から先端部に向けてインペラの回転方向と逆方向に螺旋状に巻きつけることにより形成されることを特徴とする攪拌式脱硫装置用のインペラ。
The rotating shaft (12) has a double cylinder structure of an outer cylinder (15) provided with a stirring blade (13) at the tip and an inner cylinder (16) arranged with a gap in the outer cylinder (15). The impeller (11) for the stirring type desulfurization apparatus in which the outer surfaces of the outer cylinder (15) and the stirring blade (13) are covered with the refractory (14), and the cooling air flows from the upper side to the inner side. It is supplied into the cylinder (16), passes through the lower end opening of the inner cylinder (16), rises to the gap with the outer cylinder (15), and passes through the opening (18) provided on the upper part of the outer cylinder (15) to the outside. In the impeller for the stirred desulfurization device to be released,
A spiral convex portion is formed on the outer peripheral surface of the inner cylinder (16) or the inner peripheral surface of the outer cylinder (15), and the spiral convex portion is the outer peripheral surface of the inner cylinder (16) or the outer cylinder (15). for stirring desulfurization apparatus characterized by toward the distal end portion of the bars (17) from the base end portion of the impeller La is formed by winding spirally in a direction opposite to the rotation direction of the impeller on the inner peripheral surface of the Impeller.
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| JP2008288820A JP5495534B2 (en) | 2008-11-11 | 2008-11-11 | Impeller for stirring desulfurization equipment |
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| JP2008288820A JP5495534B2 (en) | 2008-11-11 | 2008-11-11 | Impeller for stirring desulfurization equipment |
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| JP5495534B2 true JP5495534B2 (en) | 2014-05-21 |
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| JP5578415B2 (en) * | 2010-04-21 | 2014-08-27 | 株式会社リコー | Cooling device and image forming apparatus |
| KR101344349B1 (en) * | 2011-06-24 | 2013-12-23 | 신동기계산업 (주) | Stirring apparatus for melting funace |
| KR101687292B1 (en) * | 2015-12-18 | 2016-12-16 | 신일인텍 주식회사 | Desulfurization device for ladle |
| CN107435085B (en) * | 2017-07-17 | 2019-03-15 | 武汉钢铁有限公司 | The efficient mixing agitator of desulfurizing iron |
| CN107937655B (en) * | 2017-12-07 | 2019-07-09 | 武汉钢铁有限公司 | A kind of long-life molten iron desulphurization stirring device |
| CN108262490A (en) * | 2018-03-28 | 2018-07-10 | 昆明银科电子材料股份有限公司 | For the nitrogen cooling means and system of touch screen silver powder preparation process |
| CN110455094B (en) * | 2019-07-18 | 2021-08-03 | 派罗特克（广西南宁）高温材料有限公司 | Molten metal stirring mechanism with flow guide heat dissipation ring |
| CN113134595A (en) * | 2021-04-08 | 2021-07-20 | 西北工业大学 | Smelting furnace and smelting method for making chemical components and microstructure of magnesium alloy uniform |
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