JP2006205217A - Stopper for automatic pouring furnace - Google Patents

Stopper for automatic pouring furnace Download PDF

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JP2006205217A
JP2006205217A JP2005020996A JP2005020996A JP2006205217A JP 2006205217 A JP2006205217 A JP 2006205217A JP 2005020996 A JP2005020996 A JP 2005020996A JP 2005020996 A JP2005020996 A JP 2005020996A JP 2006205217 A JP2006205217 A JP 2006205217A
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Prior art keywords
stopper
automatic pouring
nozzle
molten metal
pouring furnace
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JP2005020996A
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Shigenori Yamamoto
成規 山本
Sadanori Kasugai
貞規 春日井
Toshiyuki Muroi
利行 室井
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Akechi Ceramics Co Ltd
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Akechi Ceramics Co Ltd
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Priority to JP2005020996A priority Critical patent/JP2006205217A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a stopper for an automatic pouring furnace with which entrapment of slag can be restrained. <P>SOLUTION: The stopper 1 for an automatic pouring furnace moves vertically to open and close a nozzle hole 17 in a molten metal pouring nozzle 16 of the automatic pouring furnace 11, wherein a flange-like radially enlarged portion 4 is formed on the outer periphery of the immersion portion of the stopper which is immersed in molten metal when the nozzle hole 17 is opened. The flange-like radially enlarged portion 4 prevents the slag floated up on a molten metal surface from being entrapped in a vortex flow which is enlarged as the molten metal surface in the automatic pouring furnace 11 lowers, and from being discharged into a mold from the molten metal pouring nozzle 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、自動注湯炉用ストッパーに関するものである。   The present invention relates to a stopper for an automatic pouring furnace.

自動注湯炉では、ストッパーを上昇させて注湯ノズルのノズル孔を開くと、注湯ノズルの上方で下降流が発生する。そして、この下降流に引かれて渦巻き流が生じる。自動注湯炉の湯面が下がるにつれて渦巻き流が漏斗状に拡大する。この拡大した渦巻き流に、湯面に浮遊するスラグが巻き込まれて注湯ノズルから鋳型内に排出されてしまうという問題点がある。
なし In the automatic pouring furnace, when the stopper is raised to open the nozzle hole of the pouring nozzle, a downward flow is generated above the pouring nozzle. And it is drawn by this downward flow and a spiral flow arises. As the hot water level of the automatic pouring furnace decreases, the spiral flow expands in a funnel shape. There is a problem that slag floating on the hot water surface is caught in this expanded spiral flow and discharged from the pouring nozzle into the mold.
None

本発明は上記の問題点を解決するためになされたもので、形状の改良によりスラグの巻き込みを抑制できる自動注湯炉用ストッパー（以下、ストッパーという。）を提供することを目的とするものである。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a stopper for an automatic pouring furnace (hereinafter referred to as a stopper) capable of suppressing entrainment of slag by improving the shape. is there.

上記課題を解決するための本発明のストッパーは、自動注湯炉の注湯ノズルのノズル孔を開閉するストッパーにおいて、前記ノズル孔の開時に溶湯に浸漬する部位の外周に、フランジ状の拡径部を形成したことを特徴とする。   The stopper of the present invention for solving the above problems is a stopper that opens and closes a nozzle hole of a pouring nozzle of an automatic pouring furnace. A part is formed.

上記構成のストッパーによれば、ノズル孔の開時に溶湯に浸漬する部位の外周に、フランジ状の拡径部を形成したから、自動注湯炉の湯面が下がるにつれて拡大する渦巻き流に、湯面に浮遊するスラグが巻き込まれ、注湯ノズルから鋳型内に排出されるのを抑制することができる。   According to the stopper configured as described above, since the flange-shaped enlarged diameter portion is formed on the outer periphery of the portion immersed in the molten metal when the nozzle hole is opened, the hot water flows into the spiral flow that expands as the molten metal surface of the automatic pouring furnace is lowered. It is possible to prevent slag floating on the surface from being caught and discharged from the pouring nozzle into the mold.

自動注湯炉の湯面が下がるにつれて拡大する渦巻き流に、湯面に浮遊するスラグが巻き込まれ、注湯ノズルから鋳型内に排出されるのを抑制するという目的を、自動注湯炉の注湯ノズルのノズル孔を開閉するストッパーに、ノズル孔の開時に溶湯に浸漬する部位の外周に、フランジ状の拡径部を形成することにより実現した。   The purpose of the automatic pouring furnace is to prevent the slag floating on the hot water surface from being entrained in the spiral flow that expands as the hot water surface of the automatic pouring furnace is lowered, and to be discharged from the pouring nozzle into the mold. This was realized by forming a flange-shaped enlarged diameter portion on the outer periphery of the portion immersed in the molten metal when the nozzle hole was opened in the stopper that opens and closes the nozzle hole of the hot water nozzle.

本発明の実施例について添付図面を参照して説明する。図１は、実施例に係るストッパー１の要部の正面図、図２はストッパー１を使用した自動注湯炉１１の断面図である。ストッパー１の本体２の先端部には、後述する注湯ノズルのノズル孔を開閉するストッパーヘッド３が形成されている。そして、ノズル孔の開時に溶湯に浸漬する部位の外周にフランジ状の拡径部４が形成されている。拡径部４の下面は、テ−パ面４ａが形成されている。   Embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of a main part of a stopper 1 according to the embodiment, and FIG. 2 is a cross-sectional view of an automatic pouring furnace 11 using the stopper 1. A stopper head 3 that opens and closes a nozzle hole of a pouring nozzle described later is formed at the tip of the main body 2 of the stopper 1. And the flange-shaped enlarged diameter part 4 is formed in the outer periphery of the site | part immersed in a molten metal at the time of opening of a nozzle hole. A taper surface 4 a is formed on the lower surface of the enlarged diameter portion 4.

ストッパー１に形成する上記拡径部４について、以下の実験によりその効果を検証した。自動注湯炉を想定して、幅３５０（ｍｍ）×長さ５００（ｍｍ）×深さ５００（ｍｍ）の水槽の中央に内径３０（ｍｍ）のノズル孔を設けた。その水槽に７０リットルの水を入れるとともに、スラグを想定して直径１（ｍｍ）の発泡スチロールを２００ｇを浮かべた。そして、本体２の外径を５０（ｍｍ）として、図１の符号Ａで示す外径及び符号Ｂで示すストッパーヘッド３からの距離を変えて拡径部４を形成した各種のストッパー１を用い、水槽のノズル孔を開いて水を３５リットルまで排水したとき水槽から排出される発泡スチロールの割合を測定した。   About the said enlarged diameter part 4 formed in the stopper 1, the effect was verified by the following experiment. Assuming an automatic pouring furnace, a nozzle hole having an inner diameter of 30 (mm) was provided at the center of a water tank of width 350 (mm) × length 500 (mm) × depth 500 (mm). While putting 70 liters of water into the water tank, 200 g of polystyrene foam having a diameter of 1 (mm) was floated assuming slag. Various types of stoppers 1 are used in which the outer diameter of the main body 2 is 50 (mm) and the outer diameter indicated by the symbol A and the distance from the stopper head 3 indicated by the symbol B in FIG. When the nozzle hole of the water tank was opened and water was drained to 35 liters, the ratio of the polystyrene foam discharged from the water tank was measured.

Figure 2006205217
Figure 2006205217

表１により、拡径部４の外径が大きくなるに従い、またストッパーヘッド３からの距離が大きくなるにつれて、つまり最終的な水面と拡径部４の距離が近づくにつれ水槽外へ排出される発泡スチロールの割合が低下することが確認され、拡径部４のスラグ巻き込み抑制効果が予想できる。   According to Table 1, as the outer diameter of the enlarged diameter portion 4 increases, and as the distance from the stopper head 3 increases, that is, as the distance between the final water surface and the enlarged diameter portion 4 approaches, the expanded polystyrene is discharged out of the water tank. It is confirmed that the ratio of slag is reduced, and the slag entrainment suppressing effect of the enlarged diameter portion 4 can be expected.

上記した自動注湯炉１１は、溶湯貯留槽１２の上部に加圧室１３が形成されている。加圧室１３の左右に受湯口１４とノズル装着部１５が形成されている。ノズル装着部１５には、注湯ノズル１６が装着されている。そして、注湯ノズル１６に対向して、ストッパー１が図示しない上下動機構に吊持されてる。ストッパー１は上下動により、注湯ノズル１６のノズル孔１７を開閉する。注湯ノズル１６の下方に鋳型１８が配設されている。   In the automatic pouring furnace 11 described above, a pressurizing chamber 13 is formed above the molten metal storage tank 12. A hot water receiving port 14 and a nozzle mounting portion 15 are formed on the left and right sides of the pressurizing chamber 13. A pouring nozzle 16 is mounted on the nozzle mounting portion 15. The stopper 1 is suspended by a vertical movement mechanism (not shown) so as to face the pouring nozzle 16. The stopper 1 opens and closes the nozzle hole 17 of the pouring nozzle 16 by moving up and down. A casting mold 18 is disposed below the pouring nozzle 16.

この場合、注湯ノズル１６の上方で発生する下降流に引かれて渦巻き流が生じ、さらに自動注湯炉の湯面が下がるにつれて渦巻き流が漏斗状に拡大するが、ストッパー１に形成した拡径部４により、上記水モデルによる実験で確認される拡径部４のスラグ巻き込み抑制効果が期待でき、自動注湯炉１１の湯面が下がるにつれて拡大する渦巻き流に、湯面に浮遊するスラグが巻き込まれ、注湯ノズル１６から鋳型内に排出されるのを抑制することができる。   In this case, a swirl flow is generated by the downward flow generated above the pouring nozzle 16, and the swirl flow expands in a funnel shape as the hot water level of the automatic pouring furnace is lowered. The diameter portion 4 can be expected to suppress the slag entrainment of the enlarged diameter portion 4 confirmed by the experiment using the water model. Can be prevented from being caught and discharged from the pouring nozzle 16 into the mold.

尚、拡径部４として、図３（ａ）〜（ｄ）示した形状のものであってもよい。同図（ａ）は鍔状の拡径部４であり、同（ｂ）に示した拡径部４は、図１のものを上下逆にしたものである。また、同（ｃ）に示した拡径部４は、算盤玉形状のものであり、同（ｄ）に示した拡径部４は、外周部を円弧面としたものである。   In addition, as the enlarged diameter part 4, the thing of the shape shown to Fig.3 (a)-(d) may be sufficient. FIG. 4A shows a bowl-shaped enlarged diameter portion 4, and the enlarged diameter portion 4 shown in FIG. 4B is the one shown in FIG. 1 turned upside down. Moreover, the enlarged diameter part 4 shown to the same (c) is an abacus ball-shaped thing, and the enlarged diameter part 4 shown to the same (d) makes an outer peripheral part circular arc surface.

実施例に係るストッパーの要部の正面図である。It is a front view of the principal part of the stopper which concerns on an Example. 実施例に係るストッパーを使用した自動注湯炉の断面図である。It is sectional drawing of the automatic pouring furnace using the stopper which concerns on an Example. 拡径部を例示した図面である。It is drawing which illustrated the enlarged diameter part.

符号の説明Explanation of symbols

１ ストッパー
２ 本体
３ ストッパーヘッド
４ 拡径部
１１ 自動注湯炉
１６ 注湯ノズル
１７ ノズル孔 DESCRIPTION OF SYMBOLS 1 Stopper 2 Main body 3 Stopper head 4 Expanded part 11 Automatic pouring furnace 16 Pouring nozzle 17 Nozzle hole

Claims (1)

自動注湯炉の注湯ノズルのノズル孔を開閉する自動注湯炉用ストッパーにおいて、
前記ノズル孔の開時に溶湯に浸漬する部位の外周に、フランジ状の拡径部を形成したことを特徴とする自動注湯炉用ストッパー。 In the automatic pouring furnace stopper that opens and closes the nozzle hole of the pouring nozzle of the automatic pouring furnace,
A stopper for an automatic pouring furnace, wherein a flange-shaped enlarged portion is formed on the outer periphery of a portion immersed in the molten metal when the nozzle hole is opened.
JP2005020996A 2005-01-28 2005-01-28 Stopper for automatic pouring furnace Pending JP2006205217A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102328070A (en) * 2011-10-21 2012-01-25 北京科技大学 Flow suppression ring for tundish stopper
CN108380862A (en) * 2018-04-03 2018-08-10 青岛正望钢水控制股份有限公司 A kind of anti-slag stopper of continuous casting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102328070A (en) * 2011-10-21 2012-01-25 北京科技大学 Flow suppression ring for tundish stopper
CN108380862A (en) * 2018-04-03 2018-08-10 青岛正望钢水控制股份有限公司 A kind of anti-slag stopper of continuous casting

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