WO2021005934A1 - Glass article production apparatus - Google Patents

Glass article production apparatus Download PDF

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Publication number
WO2021005934A1
WO2021005934A1 PCT/JP2020/022436 JP2020022436W WO2021005934A1 WO 2021005934 A1 WO2021005934 A1 WO 2021005934A1 JP 2020022436 W JP2020022436 W JP 2020022436W WO 2021005934 A1 WO2021005934 A1 WO 2021005934A1
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Prior art keywords
furnace
entrance block
platinum
glass
front surface
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PCT/JP2020/022436
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French (fr)
Japanese (ja)
Inventor
幹雄 檜山
裕之 板津
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日本電気硝子株式会社
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Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Priority to CN202090000581.8U priority Critical patent/CN216513446U/en
Publication of WO2021005934A1 publication Critical patent/WO2021005934A1/en

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/167—Means for preventing damage to equipment, e.g. by molten glass, hot gases, batches
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
    • C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
    • C03B5/42—Details of construction of furnace walls, e.g. to prevent corrosion; Use of materials for furnace walls
    • C03B5/425—Preventing corrosion or erosion

Definitions

  • the present invention relates to a glass article manufacturing apparatus including a glass melting furnace for melting a glass raw material to produce molten glass and a pipe for flowing the molten glass in the furnace out of the furnace.
  • glass articles typified by glass plates, glass tubes, glass fibers, etc. are manufactured by molding molten glass produced by melting a glass raw material in a glass melting furnace into a predetermined shape.
  • the molten glass produced in the glass melting furnace is discharged from the inside of the furnace to the outside of the furnace by a pipe penetrating the refractory material constituting the furnace wall.
  • the surface of the refractory that constitutes the furnace wall facing the inside of the furnace is eroded by the molten glass.
  • the flow of molten glass is intense near the pipe in the glass melting furnace.
  • a refractory material hereinafter referred to as an entrance block
  • an entrance block a refractory material through which a pipe is penetrated has a drawback that erosion easily proceeds, and as a result, the entrance block deteriorates.
  • the surface of the refractory material facing the inside of the furnace may be covered with a platinum member (platinum film or platinum plate).
  • the present invention made in view of the above circumstances has a technical problem of preventing deterioration of the entrance block by avoiding erosion of the entrance block by molten glass.
  • a glass melting furnace having an entrance block in the furnace wall and a molten glass penetrating the entrance block and flowing out the molten glass in the glass melting furnace to the outside of the furnace.
  • the entrance block is a device having a front surface facing the inside of the glass melting furnace, a back surface facing the outside of the furnace, and a side surface connecting the front surface and the back surface, and the front surface and the edge connected to the front surface on the side surface.
  • the part region is covered with a platinum member.
  • the platinum member covers not only the front surface of the entrance block facing the inside of the furnace, but also the edge region connected to the front surface on the side surface. With this configuration, a part of the platinum member is hooked on the side surface, and the platinum member is prevented from sagging accordingly. As a result, it is possible to prevent the molten glass from eroding the entrance block due to the sagging of the platinum member, and it is possible to prevent its deterioration.
  • the platinum member covers the edge region of the side surface, so that the molten glass has penetrated between the entrance block and the refractory material adjacent to the entrance block (hereinafter referred to as the adjacent block). This makes it easier to avoid erosion of the entrance block. Therefore, deterioration of the entrance block can be prevented more accurately.
  • the region other than the edge region on the side surface is also covered with the platinum member.
  • an opening for partially exposing the side surface is provided near the back surface of the portion of the platinum member that covers the side surface.
  • the amount of platinum used which is expensive, can be suppressed by the amount of the opening provided in the platinum member, so that the cost required to prevent the deterioration of the entrance block can be reduced.
  • the entrance block may be eroded by the molten glass that has penetrated through the opening, but since the opening is provided near the back surface where the molten glass does not penetrate, such a concern is accurately eliminated.
  • the back surface is covered with a platinum member.
  • FIG. 1 It is sectional drawing which shows the outline of the manufacturing apparatus of a glass article. It is an enlarged cross-sectional view which shows the part A in FIG. 1 enlarged. It is a top view which shows the entrance block provided in the manufacturing apparatus of a glass article. It is a front view which shows the entrance block provided in the manufacturing apparatus of a glass article.
  • platinum in the present invention is not limited to pure platinum, but includes platinum alloys (platinum rhodium, etc.) and reinforced platinum (platinum containing zirconia, etc.).
  • the glass article manufacturing apparatus 1 (hereinafter referred to as manufacturing apparatus 1) includes a glass melting furnace 2 (hereinafter referred to as furnace 2), a pipe 3, and a feeder 4.
  • the manufacturing apparatus 1 heats the molten glass 5 stored in the furnace 2 and sequentially melts the glass raw material 5x supplied on the molten glass 5 to generate a new molten glass 5, and also uses a pipe 3 to generate a new molten glass 5.
  • the molten glass 5 in the furnace 2 is allowed to flow out of the furnace 2.
  • the molten glass 5 flowing out of the furnace 2 is supplied to the feeder 4 connected to the pipe 3.
  • the feeder 4 includes, for example, a clarification container, a stirring pot, a state adjusting tank, a transfer pipe connecting them, and the like.
  • the molten glass 5 that has passed through such a feeder 4 is supplied to a molding apparatus and molded into a glass article.
  • the furnace 2 has a front wall 2a located at the upstream end in the flow direction of the glass raw material 5x, a rear wall 2b located at the downstream end in the flow direction, and front and back sides of the paper surface in FIG. It has a pair of side walls (not shown) facing each other, a ceiling wall 2c, and a bottom wall 2d. Each of these furnace walls consists of multiple refractories.
  • a screw feeder 6 for supplying the glass raw material 5x into the furnace 2 is arranged on the front wall 2a.
  • a burner capable of injecting a flame is arranged along the surface (liquid level) of the molten glass 5 on each of the pair of side walls.
  • An electrode 7 capable of energizing and heating the molten glass 5 is arranged on the bottom wall 2d.
  • the rear wall 2b includes the entrance block 8.
  • the entrance block 8 is one of a plurality of refractories 9 constituting the furnace wall (rear wall 2b).
  • the entrance block 8 is arranged at the lowest stage among the refractories 9 constituting the rear wall 2b.
  • the entrance block 8 is formed with a hole 8a leading from the inside of the furnace 2 to the outside of the furnace 2.
  • the pipe 3 inserted into the hole 8a penetrates the entrance block 8.
  • the inner peripheral surface of the hole 8a and the outer peripheral surface of the pipe 3 are in direct contact with each other. That is, the inner peripheral surface of the hole 8a is covered with the outer peripheral surface of the pipe 3.
  • the pipe 3 is arranged above the inner wall surface of the bottom wall 2d.
  • the downstream end of the pipe 3 is connected to the upstream end of the transfer pipe 4a included in the feeder 4 in an abutted state.
  • a flange 4ab is provided at the upstream end of the transfer pipe 4a.
  • Both the pipe 3 and the transfer pipe 4a are made of platinum.
  • the entrance block 8 has a front surface 8b facing the inside of the furnace 2, a back surface 8c facing the outside of the furnace 2, and a side surface 8d connecting the front surface 8b and the back surface 8c.
  • the side surface 8d includes an upper side surface 8da, a lower side surface 8db, a right side surface 8dc, and a left side surface 8dd.
  • the side surface 8d is located between the front surface 8b and the back surface 8c, and connects the front surface 8b and the back surface 8c.
  • each surface of the entrance block 8 the entire area of each surface excluding the upper side surface 8da (front surface 8b, back surface 8c, lower side surface 8db, right side surface 8dc, and left side surface 8dd) is covered with the platinum member 11. ing.
  • the region covered with the platinum member 11 is represented by cross-hatching.
  • an opening 11a is provided near the back surface 8c of the portion of the platinum member 11 that covers the upper side surface 8da, and the portion where the upper side surface 8da is partially exposed by the opening 11a is provided.
  • the platinum member 11 is a single member (a continuous continuous member).
  • the upper side surface 8da of the entrance block 8 but also the back surface 8c, the lower side surface 8db, the right side surface 8dc, and the left side surface 8dd are provided by the openings 11a provided in the platinum member 11. There may be a portion where the surface is partially exposed.
  • a part of the surfaces of the entrance block 8 may be completely exposed without being covered with the platinum member 11.
  • the platinum member 11 has a front surface 8b and an edge region x (xa, xb, xc, xd) of a side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b. At a minimum, it should be covered. Therefore, as an example, the back surface 8c may be completely exposed without being covered with the platinum member 11 at all.
  • the back surface 8c is made of platinum from the viewpoint of preventing the entrance block 8 from being eroded by the leaked molten glass 5. It is preferable to cover it with the member 11.
  • the platinum member 11 covering the back surface 8c may hang down. From the viewpoint of preventing this, it is preferable to cover the region other than the edge region x of the side surface 8d with the platinum member 11. As a result, the portion of the platinum member 11 that covers the back surface 8c and the portion that covers the side surface 8d (region other than the edge region x) are continuous, and the portion that covers the side surface 8d (region other than the edge region x) is the side surface. Since it is hooked on the back surface 8c, it is possible to prevent the portion covering the back surface 8c from dripping.
  • the platinum member 11 may be composed of a plurality of members instead of a single member.
  • the platinum member 11 may be divided into two members, a member on the front surface 8b side and a member on the back surface 8c side.
  • the member on the front surface 8b side is the edge region x (xa, xa, of the front surface 8b and the side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b).
  • the member on the back surface 8c side is the edge region of the back surface 8c and the side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the back surface 8c. It may cover y (ya, yb, yc, yd).
  • the platinum member 11 can be composed of, for example, a platinum film formed on the outer surface of the entrance block 8 or a platinum plate processed so as to conform to the shape of the entrance block 8.
  • the platinum member 11 may be made of one platinum plate or a plurality of platinum plates.
  • the platinum member 11 is composed of a plurality of platinum plates joined by welding.
  • the platinum plate is bent along the corners.
  • the platinum plate may have a partial gap between the platinum plate and the outer surface of the entrance block 8, or may be completely in close contact with the outer surface without a gap.
  • the platinum member 11 is not only the front surface 8b of the entrance block 8 facing the inside of the furnace 2, but also the side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b. ) To the edge region x (xa, xb, xc, xd). By having a part of the platinum member 11 hooked on the side surface 8d in this way, the platinum member 11 is prevented from sagging. As a result, it is possible to prevent the molten glass 5 from eroding the entrance block 8 due to the sagging of the platinum member 11, and it is possible to prevent its deterioration.
  • the apparatus for manufacturing a glass article according to the present invention is not limited to the configuration described in the above embodiment.
  • the platinum member 11 has a front surface 8b and an edge region x (xa, xb, xc, xd) of a side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b. Should be covered. That is, the region other than the edge region x on the side surface 8d (the remaining region excluding the edge region x) may be covered with the platinum member 11 or may be exposed without being covered.
  • the edge region x may be a region where the distance from the front surface 8b is 100 mm or less. It is preferable that the distance is 200 mm or less. From the viewpoint of further reducing the erosion of the entrance block 8 by the molten glass 5 that has penetrated between the entrance block 8 and the adjacent refractory 9, the region other than the edge region x on the side surface 8d is covered with the platinum member 11. It is preferable to have.
  • the opening 11a that partially exposes the side surface 8d may be omitted, but from the viewpoint of reducing the erosion of the entrance block 8 by the infiltrated molten glass 5 while suppressing the amount of platinum used, the side surface of the platinum member 11 It is preferable to provide the portion covering 8d closer to the back surface 8c.
  • the thickness of the entrance block 8 dimensions from the front surface 8b to the back surface 8c
  • the opening 11a has, for example, a distance (mm) from the back surface 8c within the range of 0.05t to 0.5t. It may be provided.

Abstract

This glass article production apparatus 1 is provided with: a glass melting furnace 2 including an entrance block 8 at a back wall 2b; and a pipe 3 which penetrates the entrance block 8 and through which molten glass 5 inside the furnace 2 is allowed to flow out of the furnace 2, the entrance block 8 having a front surface 8b facing the interior of the furnace 2, a back surface 8c facing the outside of the furnace 2, and lateral surfaces 8d (upper lateral surface 8da, lower lateral surface 8db, right lateral surface 8dc, and left lateral surface 8dd) that connect the front surface 8b and the back surface 8c, wherein the front surface 8b and edge regions x (xa, xb, xc, xd) of the lateral surfaces 8d contiguous to the front surface 8b are covered with a platinum member 11.

Description

ガラス物品の製造装置Glass article manufacturing equipment
　本発明は、ガラス原料を溶融させて溶融ガラスを生成するガラス溶融炉と、炉内の溶融ガラスを炉外に流出させるパイプとを備えたガラス物品の製造装置に関する。 The present invention relates to a glass article manufacturing apparatus including a glass melting furnace for melting a glass raw material to produce molten glass and a pipe for flowing the molten glass in the furnace out of the furnace.
　周知のように、ガラス板、ガラス管、ガラス繊維等に代表されるガラス物品は、ガラス溶融炉にてガラス原料を溶融させて生成した溶融ガラスを所定の形状に成形することにより製造される。ガラス溶融炉で生成された溶融ガラスは、炉壁を構成する耐火物を貫通したパイプにより炉内から炉外に流出させる。 As is well known, glass articles typified by glass plates, glass tubes, glass fibers, etc. are manufactured by molding molten glass produced by melting a glass raw material in a glass melting furnace into a predetermined shape. The molten glass produced in the glass melting furnace is discharged from the inside of the furnace to the outside of the furnace by a pipe penetrating the refractory material constituting the furnace wall.
　ところで、炉壁を構成する耐火物における炉内に臨む面は、溶融ガラスによって浸食される。特に、ガラス溶融炉内におけるパイプの付近では、溶融ガラスの流れが激しい。このため、パイプを貫通させた耐火物（以下、エントランスブロックと称する）では、浸食が進行しやすく、その結果、エントランスブロックが劣化してしまうという難点がある。 By the way, the surface of the refractory that constitutes the furnace wall facing the inside of the furnace is eroded by the molten glass. In particular, the flow of molten glass is intense near the pipe in the glass melting furnace. For this reason, a refractory material (hereinafter referred to as an entrance block) through which a pipe is penetrated has a drawback that erosion easily proceeds, and as a result, the entrance block deteriorates.
　このような炉壁を構成する耐火物の浸食対策として、特許文献１に開示されるように、耐火物における炉内に臨む面を白金部材（白金膜や白金板）で覆う場合がある。 As a measure against erosion of the refractory material constituting such a furnace wall, as disclosed in Patent Document 1, the surface of the refractory material facing the inside of the furnace may be covered with a platinum member (platinum film or platinum plate).
特開２０１０－２０２４４４号公報JP-A-2010-202444
　しかしながら、上述の対策をエントランスブロックに施し、エントランスブロックにおける炉内に臨む面を白金部材で覆った場合であっても、白金部材が垂れて溶融ガラスによるエントランスブロックの浸食を回避できなくなり、その劣化を防止できない場合があることから、更なる改良を加える必要が生じていた。 However, even when the above measures are applied to the entrance block and the surface of the entrance block facing the inside of the furnace is covered with a platinum member, the platinum member hangs down and erosion of the entrance block by the molten glass cannot be avoided, and the deterioration thereof. In some cases, it was not possible to prevent this, so it was necessary to make further improvements.
　上記の事情に鑑みなされた本発明は、溶融ガラスによるエントランスブロックの浸食を回避することで、エントランスブロックの劣化を防止することを技術的な課題とする。 The present invention made in view of the above circumstances has a technical problem of preventing deterioration of the entrance block by avoiding erosion of the entrance block by molten glass.
　上記の課題を解決するための本発明に係るガラス物品の製造装置は、炉壁にエントランスブロックを含んだガラス溶融炉と、エントランスブロックを貫通すると共にガラス溶融炉内の溶融ガラスを炉外に流出させるパイプとを備え、エントランスブロックが、ガラス溶融炉内に臨む正面、炉外に臨む背面、及び正面と背面とを連続させる側面を有する装置であって、正面、及び、側面における正面に連なる縁部領域が、白金部材で覆われていることを特徴とする。 In the glass article manufacturing apparatus according to the present invention for solving the above problems, a glass melting furnace having an entrance block in the furnace wall and a molten glass penetrating the entrance block and flowing out the molten glass in the glass melting furnace to the outside of the furnace. The entrance block is a device having a front surface facing the inside of the glass melting furnace, a back surface facing the outside of the furnace, and a side surface connecting the front surface and the back surface, and the front surface and the edge connected to the front surface on the side surface. The part region is covered with a platinum member.
　本装置では、白金部材が炉内に臨むエントランスブロックの正面のみでなく、側面における正面に連なる縁部領域まで覆っている。この構成により、白金部材の一部が側面に引っ掛けられた状態となり、これに伴って白金部材の垂れが防止される。その結果、白金部材の垂れに起因して溶融ガラスがエントランスブロックを浸食することを回避でき、その劣化を防止することが可能となる。また、副次的な効果として、白金部材が側面の縁部領域を覆っていることで、エントランスブロックと、これに隣接した耐火物（以下、隣接ブロックと表記）との間に浸入した溶融ガラスにより、エントランスブロックが浸食されることも回避しやすくなる。従って、エントランスブロックの劣化をより的確に防止できる。 In this device, the platinum member covers not only the front surface of the entrance block facing the inside of the furnace, but also the edge region connected to the front surface on the side surface. With this configuration, a part of the platinum member is hooked on the side surface, and the platinum member is prevented from sagging accordingly. As a result, it is possible to prevent the molten glass from eroding the entrance block due to the sagging of the platinum member, and it is possible to prevent its deterioration. In addition, as a secondary effect, the platinum member covers the edge region of the side surface, so that the molten glass has penetrated between the entrance block and the refractory material adjacent to the entrance block (hereinafter referred to as the adjacent block). This makes it easier to avoid erosion of the entrance block. Therefore, deterioration of the entrance block can be prevented more accurately.
　上記の構成では、側面における縁部領域以外の領域についても、白金部材で覆われていることが好ましい。 In the above configuration, it is preferable that the region other than the edge region on the side surface is also covered with the platinum member.
　このようにすれば、エントランスブロックと隣接ブロックとの間に浸入した溶融ガラスによるエントランスブロックの浸食について、一層好適に回避することが可能になる。その結果、エントランスブロックの劣化を更に確実に防止できる。 By doing so, it becomes possible to more preferably avoid erosion of the entrance block by the molten glass that has penetrated between the entrance block and the adjacent block. As a result, deterioration of the entrance block can be prevented more reliably.
　上記の構成では、白金部材における側面を覆った部位のうちの背面寄りに、側面を部分的に露出させる開口が設けられていることが好ましい。 In the above configuration, it is preferable that an opening for partially exposing the side surface is provided near the back surface of the portion of the platinum member that covers the side surface.
　このようにすれば、白金部材に開口が設けられている分だけ、高価である白金の使用量を抑制できることから、エントランスブロックの劣化を防止するのに要するコストを削減することが可能となる。なお、開口から浸入した溶融ガラスによりエントランスブロックが浸食されることが危惧されるが、溶融ガラスの浸入が略無い背面寄りに開口を設けているため、このような危惧は的確に排除される。 In this way, the amount of platinum used, which is expensive, can be suppressed by the amount of the opening provided in the platinum member, so that the cost required to prevent the deterioration of the entrance block can be reduced. There is a concern that the entrance block may be eroded by the molten glass that has penetrated through the opening, but since the opening is provided near the back surface where the molten glass does not penetrate, such a concern is accurately eliminated.
　上記の構成では、背面が白金部材で覆われていることが好ましい。 In the above configuration, it is preferable that the back surface is covered with a platinum member.
　エントランスブロックを貫通したパイプの下流側端部には、別のパイプの上流側端部を突き合わせて接続するのが通例である。このとき、エントランスブロックの背面が白金部材で覆われていれば、パイプ同士を突き合わせた箇所から溶融ガラスが漏れ出した場合でも、漏れ出た溶融ガラスによってエントランスブロックが浸食されることを好適に回避できる。 It is customary to abutting and connecting the upstream end of another pipe to the downstream end of the pipe that penetrates the entrance block. At this time, if the back surface of the entrance block is covered with a platinum member, even if the molten glass leaks from the portion where the pipes are butted against each other, it is preferably avoided that the entrance block is eroded by the leaked molten glass. it can.
　本発明に係るガラス物品の製造装置によれば、溶融ガラスによるエントランスブロックの浸食を回避できるため、エントランスブロックの劣化を防止することが可能となる。 According to the glass article manufacturing apparatus according to the present invention, erosion of the entrance block by molten glass can be avoided, so that deterioration of the entrance block can be prevented.
ガラス物品の製造装置の概略を示す断面図である。It is sectional drawing which shows the outline of the manufacturing apparatus of a glass article. 図１におけるＡ部を拡大して示す拡大断面図である。It is an enlarged cross-sectional view which shows the part A in FIG. 1 enlarged. ガラス物品の製造装置に備わったエントランスブロックを示す平面図である。It is a top view which shows the entrance block provided in the manufacturing apparatus of a glass article. ガラス物品の製造装置に備わったエントランスブロックを示す正面図である。It is a front view which shows the entrance block provided in the manufacturing apparatus of a glass article.
　以下、本発明の実施形態に係るガラス物品の製造装置について、添付の図面を参照しながら説明する。ここで、本発明における「白金」とは、純白金に限らず、白金合金（白金ロジウム等）及び強化白金（ジルコニアを含有した白金等）を含むものとする。 Hereinafter, the apparatus for manufacturing a glass article according to the embodiment of the present invention will be described with reference to the attached drawings. Here, "platinum" in the present invention is not limited to pure platinum, but includes platinum alloys (platinum rhodium, etc.) and reinforced platinum (platinum containing zirconia, etc.).
　図１に示すように、ガラス物品の製造装置１（以下、製造装置１と表記）は、ガラス溶融炉２（以下、炉２と表記）と、パイプ３と、フィーダー４とを備えている。 As shown in FIG. 1, the glass article manufacturing apparatus 1 (hereinafter referred to as manufacturing apparatus 1) includes a glass melting furnace 2 (hereinafter referred to as furnace 2), a pipe 3, and a feeder 4.
　製造装置１は、炉２内に貯留された溶融ガラス５を加熱しつつ、溶融ガラス５上に供給されたガラス原料５ｘを順次に溶融させて新たな溶融ガラス５を生成すると共に、パイプ３により炉２内の溶融ガラス５を炉２外に流出させる。炉２外に流出した溶融ガラス５は、パイプ３と接続されたフィーダー４に供給される。フィーダー４は、例えば清澄容器や撹拌ポット、状態調整槽、それらを接続する移送管等を備える。このようなフィーダー４を通過した溶融ガラス５は、成形装置に供給されてガラス物品に成形される。 The manufacturing apparatus 1 heats the molten glass 5 stored in the furnace 2 and sequentially melts the glass raw material 5x supplied on the molten glass 5 to generate a new molten glass 5, and also uses a pipe 3 to generate a new molten glass 5. The molten glass 5 in the furnace 2 is allowed to flow out of the furnace 2. The molten glass 5 flowing out of the furnace 2 is supplied to the feeder 4 connected to the pipe 3. The feeder 4 includes, for example, a clarification container, a stirring pot, a state adjusting tank, a transfer pipe connecting them, and the like. The molten glass 5 that has passed through such a feeder 4 is supplied to a molding apparatus and molded into a glass article.
　炉２は、炉壁として、ガラス原料５ｘの流れ方向の上流端に位置する前壁２ａと、流れ方向の下流端に位置する後壁２ｂと、図１における紙面の手前側と奥側とで対向する一対の側壁（不図示）と、天井壁２ｃと、底壁２ｄとを有する。これらの炉壁はそれぞれ複数の耐火物でなる。 The furnace 2 has a front wall 2a located at the upstream end in the flow direction of the glass raw material 5x, a rear wall 2b located at the downstream end in the flow direction, and front and back sides of the paper surface in FIG. It has a pair of side walls (not shown) facing each other, a ceiling wall 2c, and a bottom wall 2d. Each of these furnace walls consists of multiple refractories.
　前壁２ａには、ガラス原料５ｘを炉２内に供給するためのスクリューフィーダー６が配置されている。一対の側壁のそれぞれには、溶融ガラス５の表面（液面）に沿って火炎の噴射が可能なバーナーが配置されている。底壁２ｄには、溶融ガラス５の通電加熱が可能な電極７が配置されている。 A screw feeder 6 for supplying the glass raw material 5x into the furnace 2 is arranged on the front wall 2a. A burner capable of injecting a flame is arranged along the surface (liquid level) of the molten glass 5 on each of the pair of side walls. An electrode 7 capable of energizing and heating the molten glass 5 is arranged on the bottom wall 2d.
　図２に示すように、後壁２ｂにはエントランスブロック８が含まれている。エントランスブロック８は、炉壁（後壁２ｂ）を構成する複数の耐火物９のうちの一つである。エントランスブロック８は、後壁２ｂを構成する耐火物９のうちで最下段に配置されている。 As shown in FIG. 2, the rear wall 2b includes the entrance block 8. The entrance block 8 is one of a plurality of refractories 9 constituting the furnace wall (rear wall 2b). The entrance block 8 is arranged at the lowest stage among the refractories 9 constituting the rear wall 2b.
　エントランスブロック８には、炉２内から炉２外に通じる孔８ａが形成されている。この孔８ａに挿入されたパイプ３がエントランスブロック８を貫通している。孔８ａの内周面と、パイプ３の外周面とは直接に接触している。つまり、孔８ａの内周面が、パイプ３の外周面によって覆われた状態にある。なお、パイプ３は、底壁２ｄの内壁面よりも上方に配置されている。パイプ３の下流側端部には、フィーダー４が備える移送管４ａの上流側端部が突き合わされた状態で接続されている。移送管４ａの上流側端部にはフランジ４ａｂが設けられている。パイプ３及び移送管４ａは、いずれも白金で構成されている。 The entrance block 8 is formed with a hole 8a leading from the inside of the furnace 2 to the outside of the furnace 2. The pipe 3 inserted into the hole 8a penetrates the entrance block 8. The inner peripheral surface of the hole 8a and the outer peripheral surface of the pipe 3 are in direct contact with each other. That is, the inner peripheral surface of the hole 8a is covered with the outer peripheral surface of the pipe 3. The pipe 3 is arranged above the inner wall surface of the bottom wall 2d. The downstream end of the pipe 3 is connected to the upstream end of the transfer pipe 4a included in the feeder 4 in an abutted state. A flange 4ab is provided at the upstream end of the transfer pipe 4a. Both the pipe 3 and the transfer pipe 4a are made of platinum.
　図２～図４に示すように、エントランスブロック８は、炉２内に臨む正面８ｂ、炉２外に臨む背面８ｃ、及び、正面８ｂと背面８ｃとを連続させる側面８ｄを有する。なお、側面８ｄには、上側面８ｄａ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄが含まれている。側面８ｄは、正面８ｂと背面８ｃとの間に位置し、正面８ｂと背面８ｃとを繋ぐ。 As shown in FIGS. 2 to 4, the entrance block 8 has a front surface 8b facing the inside of the furnace 2, a back surface 8c facing the outside of the furnace 2, and a side surface 8d connecting the front surface 8b and the back surface 8c. The side surface 8d includes an upper side surface 8da, a lower side surface 8db, a right side surface 8dc, and a left side surface 8dd. The side surface 8d is located between the front surface 8b and the back surface 8c, and connects the front surface 8b and the back surface 8c.
　エントランスブロック８の各面のうち、上側面８ｄａを除いた面（正面８ｂ、背面８ｃ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄ）については、それぞれの全領域が白金部材１１で覆われている。ここで、図３ａ，図３ｂでは、白金部材１１で覆われた領域をクロスハッチングで表している。一方、上側面８ｄａについては、白金部材１１における上側面８ｄａを覆った部位のうちの背面８ｃ寄りに、開口１１ａが設けられており、この開口１１ａにより上側面８ｄａが部分的に露出した箇所が存在している。なお、本実施形態では、白金部材１１が単一部材（連続した一続きの部材）でなる。 Of each surface of the entrance block 8, the entire area of each surface excluding the upper side surface 8da (front surface 8b, back surface 8c, lower side surface 8db, right side surface 8dc, and left side surface 8dd) is covered with the platinum member 11. ing. Here, in FIGS. 3a and 3b, the region covered with the platinum member 11 is represented by cross-hatching. On the other hand, regarding the upper side surface 8da, an opening 11a is provided near the back surface 8c of the portion of the platinum member 11 that covers the upper side surface 8da, and the portion where the upper side surface 8da is partially exposed by the opening 11a is provided. Existing. In the present embodiment, the platinum member 11 is a single member (a continuous continuous member).
　ここで、本実施形態の変形例として、エントランスブロック８の上側面８ｄａに限らず、背面８ｃ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄについても、白金部材１１に設けられた開口１１ａにより面が部分的に露出した箇所を存在させてもよい。 Here, as a modification of the present embodiment, not only the upper side surface 8da of the entrance block 8 but also the back surface 8c, the lower side surface 8db, the right side surface 8dc, and the left side surface 8dd are provided by the openings 11a provided in the platinum member 11. There may be a portion where the surface is partially exposed.
　また、本実施形態の変形例として、エントランスブロック８の各面のうち、一部の面が白金部材１１で全く覆われずに完全に露出していてもよい。白金部材１１は、正面８ｂと、正面８ｂに連なる側面８ｄ（上側面８ｄａ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄ）の縁部領域ｘ（ｘａ、ｘｂ、ｘｃ、ｘｄ）とを、最低限覆っていればよい。そのため、一例として、背面８ｃが白金部材１１で全く覆われずに完全に露出していてもよい。ただし、パイプ３と移送管４ａとの突き合わされた箇所から溶融ガラス５が漏れ出した場合に、漏れ出た溶融ガラス５によってエントランスブロック８が浸食されることを回避する観点では、背面８ｃを白金部材１１で覆うことが好ましい。 Further, as a modification of the present embodiment, a part of the surfaces of the entrance block 8 may be completely exposed without being covered with the platinum member 11. The platinum member 11 has a front surface 8b and an edge region x (xa, xb, xc, xd) of a side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b. At a minimum, it should be covered. Therefore, as an example, the back surface 8c may be completely exposed without being covered with the platinum member 11 at all. However, when the molten glass 5 leaks from the abutting portion between the pipe 3 and the transfer pipe 4a, the back surface 8c is made of platinum from the viewpoint of preventing the entrance block 8 from being eroded by the leaked molten glass 5. It is preferable to cover it with the member 11.
　背面８ｃを白金部材１１で覆う場合に側面８ｄの縁部領域ｘ以外の領域を白金部材１１で覆わなければ、背面８ｃを覆う白金部材１１が垂れるおそれがある。これを防止する観点から、側面８ｄの縁部領域ｘ以外の領域についても、白金部材１１で覆うことが好ましい。これにより、白金部材１１のうちで背面８ｃを覆う部位と側面８ｄ（縁部領域ｘ以外の領域）を覆う部位とが連続し、側面８ｄ（縁部領域ｘ以外の領域）を覆う部位が側面に引っ掛けられた状態となるので、背面８ｃを覆う部位が垂れるのを防止できる。 When the back surface 8c is covered with the platinum member 11, if the area other than the edge region x of the side surface 8d is not covered with the platinum member 11, the platinum member 11 covering the back surface 8c may hang down. From the viewpoint of preventing this, it is preferable to cover the region other than the edge region x of the side surface 8d with the platinum member 11. As a result, the portion of the platinum member 11 that covers the back surface 8c and the portion that covers the side surface 8d (region other than the edge region x) are continuous, and the portion that covers the side surface 8d (region other than the edge region x) is the side surface. Since it is hooked on the back surface 8c, it is possible to prevent the portion covering the back surface 8c from dripping.
　さらに、本実施形態の変形例として、白金部材１１が単一部材ではなく、複数の部材からなってもよい。例えば、白金部材１１が、正面８ｂ側の部材と背面８ｃ側の部材との二つの部材に分割されていてもよい。具体的な例としては、正面８ｂ側の部材が、正面８ｂと、正面８ｂに連なる側面８ｄ（上側面８ｄａ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄ）の縁部領域ｘ（ｘａ、ｘｂ、ｘｃ、ｘｄ）とを覆うと共に、背面８ｃ側の部材が、背面８ｃと、背面８ｃに連なる側面８ｄ（上側面８ｄａ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄ）の縁部領域ｙ（ｙａ、ｙｂ、ｙｃ、ｙｄ）とを覆うようにしてもよい。 Further, as a modification of the present embodiment, the platinum member 11 may be composed of a plurality of members instead of a single member. For example, the platinum member 11 may be divided into two members, a member on the front surface 8b side and a member on the back surface 8c side. As a specific example, the member on the front surface 8b side is the edge region x (xa, xa, of the front surface 8b and the side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b). xb, xc, xd), and the member on the back surface 8c side is the edge region of the back surface 8c and the side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the back surface 8c. It may cover y (ya, yb, yc, yd).
　白金部材１１は、例えば、エントランスブロック８の外表面に成膜された白金膜や、エントランスブロック８の形状に沿うように加工された白金板で構成できる。白金部材１１を白金板で構成する場合には、一枚の白金板で構成してもよいし、複数枚の白金板で構成してもよい。本実施形態では、溶接により継がれた複数枚の白金板で白金部材１１を構成している。エントランスブロック８のコーナー部（エントランスブロック８の隣り合う面同士が接続する箇所）では、当該コーナー部に沿うように白金板に対して曲げ加工を施している。ここで、白金板は、エントランスブロック８の外表面との相互間に部分的に隙間を有していてもよいし、隙間なく完全に外表面に密着していてもよい。 The platinum member 11 can be composed of, for example, a platinum film formed on the outer surface of the entrance block 8 or a platinum plate processed so as to conform to the shape of the entrance block 8. When the platinum member 11 is made of a platinum plate, it may be made of one platinum plate or a plurality of platinum plates. In the present embodiment, the platinum member 11 is composed of a plurality of platinum plates joined by welding. At the corners of the entrance block 8 (where the adjacent surfaces of the entrance block 8 are connected to each other), the platinum plate is bent along the corners. Here, the platinum plate may have a partial gap between the platinum plate and the outer surface of the entrance block 8, or may be completely in close contact with the outer surface without a gap.
　以下、上記の製造装置１による主たる作用・効果について説明する。 Hereinafter, the main actions / effects of the above manufacturing apparatus 1 will be described.
　上記の製造装置１では、白金部材１１が、炉２内に臨むエントランスブロック８の正面８ｂのみでなく、正面８ｂに連なる側面８ｄ（上側面８ｄａ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄ）の縁部領域ｘ（ｘａ、ｘｂ、ｘｃ、ｘｄ）まで覆っている。このように白金部材１１の一部が側面８ｄに引っ掛けられた状態にあることで、白金部材１１の垂れが防止される。その結果、白金部材１１の垂れに起因して溶融ガラス５がエントランスブロック８を浸食することを回避でき、その劣化を防止することが可能となる。 In the above manufacturing apparatus 1, the platinum member 11 is not only the front surface 8b of the entrance block 8 facing the inside of the furnace 2, but also the side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b. ) To the edge region x (xa, xb, xc, xd). By having a part of the platinum member 11 hooked on the side surface 8d in this way, the platinum member 11 is prevented from sagging. As a result, it is possible to prevent the molten glass 5 from eroding the entrance block 8 due to the sagging of the platinum member 11, and it is possible to prevent its deterioration.
　ここで、本発明に係るガラス物品の製造装置は、上記の実施形態で説明した構成に限定されるものではない。例えば、白金部材１１は、正面８ｂと、正面８ｂに連なる側面８ｄ（上側面８ｄａ、下側面８ｄｂ、右側面８ｄｃ、及び左側面８ｄｄ）の縁部領域ｘ（ｘａ、ｘｂ、ｘｃ、ｘｄ）とを、覆っていればよい。つまり、側面８ｄにおける縁部領域ｘ以外の領域（縁部領域ｘを除いた残りの領域）は、白金部材１１で覆われていてもよく、覆われることなく、露出していてもよい。 Here, the apparatus for manufacturing a glass article according to the present invention is not limited to the configuration described in the above embodiment. For example, the platinum member 11 has a front surface 8b and an edge region x (xa, xb, xc, xd) of a side surface 8d (upper side surface 8da, lower side surface 8db, right side surface 8dc, and left side surface 8dd) connected to the front surface 8b. Should be covered. That is, the region other than the edge region x on the side surface 8d (the remaining region excluding the edge region x) may be covered with the platinum member 11 or may be exposed without being covered.
　エントランスブロック８と隣接する耐火物９との間に浸入した溶融ガラス５によるエントランスブロック８の浸食を低減する観点から、縁部領域ｘは、正面８ｂからの距離が１００ｍｍ以下の領域とすることが好ましく、前記距離が２００ｍｍ以下の領域とすることがより好ましい。エントランスブロック８と隣接する耐火物９との間に浸入した溶融ガラス５によるエントランスブロック８の浸食をさらに低減する観点から、側面８ｄにおける縁部領域ｘ以外の領域は、白金部材１１で覆われていることが好ましい。 From the viewpoint of reducing the erosion of the entrance block 8 by the molten glass 5 that has penetrated between the entrance block 8 and the adjacent refractory material 9, the edge region x may be a region where the distance from the front surface 8b is 100 mm or less. It is preferable that the distance is 200 mm or less. From the viewpoint of further reducing the erosion of the entrance block 8 by the molten glass 5 that has penetrated between the entrance block 8 and the adjacent refractory 9, the region other than the edge region x on the side surface 8d is covered with the platinum member 11. It is preferable to have.
　側面８ｄを部分的に露出させる開口１１ａは、省略してもよいが、白金の使用量を抑制しながら、浸入した溶融ガラス５によるエントランスブロック８の浸食を低減する観点から、白金部材１１における側面８ｄを覆った部位のうちの背面８ｃ寄りに設けることが好ましい。開口１１ａは、エントランスブロック８の厚み（正面８ｂから背面８ｃまでの寸法）をｔ（ｍｍ）とした場合、例えば、背面８ｃからの距離（ｍｍ）が０．０５ｔ～０．５ｔの範囲内に設ければよい。 The opening 11a that partially exposes the side surface 8d may be omitted, but from the viewpoint of reducing the erosion of the entrance block 8 by the infiltrated molten glass 5 while suppressing the amount of platinum used, the side surface of the platinum member 11 It is preferable to provide the portion covering 8d closer to the back surface 8c. When the thickness of the entrance block 8 (dimensions from the front surface 8b to the back surface 8c) is t (mm), the opening 11a has, for example, a distance (mm) from the back surface 8c within the range of 0.05t to 0.5t. It may be provided.
　１　　　　　ガラス物品の製造装置
　２　　　　　ガラス溶融炉
　２ｂ　　　　後壁
　３　　　　　パイプ
　５　　　　　溶融ガラス
　８　　　　　エントランスブロック
　８ｂ　　　　正面
　８ｃ　　　　背面
　８ｄ　　　　側面
　８ｄａ　　　上側面
　８ｄｂ　　　下側面
　８ｄｃ　　　右側面
　８ｄｄ　　　左側面
　１１　　　　白金部材
　１１ａ　　　開口
　ｘ　　　　　縁部領域 1 Glass article manufacturing equipment 2 Glass melting furnace 2b Rear wall 3 Pipe 5 Fused glass 8 Entrance block 8b Front 8c Back 8d Side 8da Upper side 8db Lower side 8dc Right side 8dd Left side 11 Platinum member 11a Opening x Edge area

Claims (4)

  1. 　炉壁にエントランスブロックを含んだガラス溶融炉と、前記エントランスブロックを貫通すると共に前記ガラス溶融炉内の溶融ガラスを炉外に流出させるパイプとを備え、
    　前記エントランスブロックが、前記ガラス溶融炉内に臨む正面、炉外に臨む背面、及び前記正面と前記背面とを連続させる側面を有するガラス物品の製造装置であって、
    　前記正面、及び、前記側面における前記正面に連なる縁部領域が、白金部材で覆われていることを特徴とするガラス物品の製造装置。     A glass melting furnace containing an entrance block in the furnace wall and a pipe that penetrates the entrance block and allows the molten glass in the glass melting furnace to flow out of the furnace are provided.
    The entrance block is a glass article manufacturing apparatus having a front surface facing the inside of the glass melting furnace, a back surface facing the outside of the furnace, and a side surface connecting the front surface and the back surface.
    An apparatus for manufacturing a glass article, characterized in that the front surface and the edge region connected to the front surface on the side surface are covered with a platinum member.
  2. 　前記側面における前記縁部領域以外の領域についても、前記白金部材で覆われていることを特徴とする請求項１に記載のガラス物品の製造装置。 The apparatus for manufacturing a glass article according to claim 1, wherein a region other than the edge region on the side surface is also covered with the platinum member.
  3. 　前記白金部材における前記側面を覆った部位のうちの前記背面寄りに、前記側面を部分的に露出させる開口が設けられていることを特徴とする請求項２に記載のガラス物品の製造装置。 The apparatus for manufacturing a glass article according to claim 2, wherein an opening for partially exposing the side surface is provided near the back surface of the portion of the platinum member that covers the side surface.
  4. 　前記背面が前記白金部材で覆われていることを特徴とする請求項１～３のいずれかに記載のガラス物品の製造装置。 The apparatus for manufacturing a glass article according to any one of claims 1 to 3, wherein the back surface is covered with the platinum member.
PCT/JP2020/022436 2019-07-05 2020-06-05 Glass article production apparatus WO2021005934A1 (en)

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