JP2000007345A5 - - Google Patents

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Publication number
JP2000007345A5
JP2000007345A5 JP1998173232A JP17323298A JP2000007345A5 JP 2000007345 A5 JP2000007345 A5 JP 2000007345A5 JP 1998173232 A JP1998173232 A JP 1998173232A JP 17323298 A JP17323298 A JP 17323298A JP 2000007345 A5 JP2000007345 A5 JP 2000007345A5
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JP
Japan
Prior art keywords
pipe
vacuum degassing
vacuum
guide pit
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1998173232A
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Japanese (ja)
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JP2000007345A (en
JP3785810B2 (en
Filing date
Publication date
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Priority to JP17323298A priority Critical patent/JP3785810B2/en
Priority claimed from JP17323298A external-priority patent/JP3785810B2/en
Publication of JP2000007345A publication Critical patent/JP2000007345A/en
Publication of JP2000007345A5 publication Critical patent/JP2000007345A5/ja
Application granted granted Critical
Publication of JP3785810B2 publication Critical patent/JP3785810B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0002】
【従来の技術】
従来より、成形されたガラス製品の品質を向上させるために、図3に示すように、溶融炉で溶融した溶融ガラスを成形装置で成形する前に溶融ガラス内に発生した気泡を除去する減圧脱泡装置が提案されている。
図3に示す減圧脱泡装置110は、溶解槽120内の溶融ガラスGを減圧脱泡処理して、次の処理槽に連続的に供給するプロセスに用いられるものであって、減圧脱泡する際には、真空吸引されて内部が減圧される減圧ハウジング112内に設けられ、減圧ハウジング112と共に減圧される減圧脱泡槽114と、その両端部に、下方に向かって垂直に取り付けられた上昇管116および下降管118が配置されており、上昇管116の下端は、溶解槽120に連通する上流案内ピット122の溶融ガラスG内に浸漬されており、下降管118の下端は、同様に、次の処理槽(図示せず)に連通する下流案内ピット124の溶融ガラスG内に浸漬されている。
[0002]
[Prior Art]
Conventionally, in order to improve the quality of molded glass products, as shown in FIG. 3, vacuum degassing is carried out to remove bubbles generated in the molten glass before it is molded by a forming apparatus with molten glass melted in a melting furnace. A foam device has been proposed.
The vacuum degassing apparatus 110 shown in FIG. 3 is used in a process of subjecting the molten glass G in the dissolving tank 120 to vacuum degassing treatment and continuously supplying the next processing tank, and the vacuum degassing process is performed. The vacuum degassing vessel 114 is provided in the decompression housing 112 and is decompressed together with the decompression housing 112 when the vacuum suction is carried out and the inside is decompressed, and the vertically mounted downwards at the both ends thereof The pipe 116 and the down pipe 118 are disposed, and the lower end of the up pipe 116 is immersed in the molten glass G of the upstream guide pit 122 communicating with the dissolving tank 120, and the lower end of the down pipe 118 is similarly It is immersed in the molten glass G of the downstream guide pit 124 in communication with the next processing tank (not shown).

【0003】
そして、減圧脱泡槽114は、図示しない真空ポンプによって真空吸引されて内部が減圧される減圧ハウジング112内におおむね水平に設けられ、減圧ハウジング112と共に減圧脱泡槽114の内部が1/3〜1/20気圧に減圧されているので、上流案内ピット122内の脱泡処理前の溶融ガラスGは、上昇管116によって吸引上昇されて減圧脱泡槽114に導入され、減圧脱泡槽114内で減圧脱泡処理が行われた後、下降管118によって下降させて下流案内ピット124に導出される。
減圧脱泡槽114の上部には、減圧ハウジング112を図示しない真空ポンプ等によって吸引口112cから真空吸引することによって、減圧脱泡槽114内を所定の圧力に減圧して維持するために、減圧ハウジング112と連通する吸引孔114a、114bが設けられている。
[0003]
The vacuum degassing tank 114 is generally horizontally provided in the vacuum housing 112 whose inside is reduced by vacuum suction by a vacuum pump (not shown), and the inside of the vacuum degassing tank 114 together with the vacuum housing 112 is 1/3 to Since the pressure is reduced to 1/20 atmosphere, the molten glass G before degassing in the upstream guide pit 122 is sucked and raised by the rising pipe 116 and introduced into the vacuum degassing tank 114, and the inside of the vacuum degassing tank 114 After the vacuum degassing process is performed, the pressure is lowered by the down pipe 118 and led out to the downstream guide pit 124.
In order to decompress and maintain the inside of the vacuum degassing tank 114 to a predetermined pressure by vacuum-sucking the vacuum housing 112 from the suction port 112c with a vacuum pump or the like (not shown) above the vacuum degassing tank 114, Suction holes 114 a and 114 b communicating with the housing 112 are provided.

【0010】
このように、高温反応性の低い白金や白金ロジウムは高価であるため、装置の大型化がコストの面から困難であり、たとえ大型化しても円管の肉厚は十分に厚くできず、そのため熱に対する強度が保てないため、温度を高くできず、溶融ガラスの粘性を小さくして脱泡効果を十分に発揮することが難しく、また、肉厚は十分に厚くできないため、作業の困難な修理や更新を考慮する必要があり、装置の大型化および大流量化は実用上困難である。
[0010]
As described above, platinum and platinum rhodium having low high-temperature reactivity are expensive, so it is difficult to increase the size of the apparatus from the viewpoint of cost. Even if the size is increased, the wall thickness of the circular pipe can not be made sufficiently thick. the strength against heat can not be maintained, can not raise the temperature, to reduce the viscosity of the molten glass it is difficult to sufficiently exhibit defoaming effects, in addition, since the thickness can not be sufficiently thick, difficult work It is necessary to consider repair and updating, and it is practically difficult to increase the size and flow rate of the apparatus.

【0021】
これに対して、従来は、図3に示す減圧脱泡装置110のように、上昇管116および下降管118を上流案内ピット122および下流案内ピット124に浸漬していたため、減圧脱泡槽114、上昇管116および下降管118を減圧ハウジング112によって常時吊架して支持する必要があるし、補修や更新をする際に上昇管116および下降管118を上流案内ピット122および下流案内ピット124から1メートルも吊り上げて抜き出す危険な作業をしなければならず、装置も大型化する為、実用上問題があったが、図1に示す減圧脱泡装置10のように、下部受けレンガ32を介して上流案内ピット22および下流案内ピット24上に載置することで、下部受けレンガ32から上昇管16および下降管18の下端を少し持ち上げて切り離すことができるので、1メートルも吊り上げる危険な作業を行う必要はなくなり、容易に上昇管16、下降管18および減圧脱泡槽14を上流案内ピット22および下流案内ピット24から下ろすことができる。
[0021]
On the other hand, conventionally, as in the vacuum degassing apparatus 110 shown in FIG. 3, since the ascending pipe 116 and the descending pipe 118 are immersed in the upstream guide pit 122 and the downstream guide pit 124, the vacuum degassing tank 114, It is necessary to always lift and support the uprising pipe 116 and the downfalling pipe 118 by the pressure reducing housing 112, and when repairing or updating, the uprising pipe 116 and the downfalling pipe 118 are separated from the upstream guide pit 122 and the downstream guide pit 124 There is a problem in practical use because it is necessary to lift and pull out the meter and carry out a dangerous work, and the apparatus is also enlarged, but as in the vacuum degassing apparatus 10 shown in FIG. by placed on the upstream guide pit 22 and the downstream guide pit 24, lifting it up slightly lower end of the uprising pipe 16 and the downfalling pipe 18 from the lower receiving bricks 32 It is possible to detach one meters lifting need no longer to perform dangerous work, can be lowered easily riser 16, the downfalling pipe 18 and the vacuum degassing vessel 14 from the upstream guide pit 22 and the downstream guide pit 24.

【0028】
下部受けレンガ32は、上昇管16および下降管18をそれぞれ上流案内ピット22および下流案内ピット24と接続する為に用いられるばかりでなく、上流案内ピット22および下流案内ピット24に載置して、上昇管16、下降管18、および減圧ハウジング12を支持し、管路の荷重を支えるために設けられた耐火物製レンガで、好ましくは上述の上昇管16、減圧脱泡槽14、および下降管18に使用される緻密質耐火物製レンガがよい。
また、減圧ハウジング12と下部受けレンガ32の下端部の接触部にシール材38が充填され、エアシールされている。減圧ハウジング12を下部受けレンガ32が支持する場合、接触部にわずかな隙間が生じ、減圧ハウジング12内に空気が流入し、減圧されないのを防ぐためである。シール材38は特に限定されるものでなく、上述のモルタルやキャスタブル材で高温耐熱性があり、エアシールされるものであればよい。例として、エアセットモルタル、タイトシールおよびアサヒハイボンド(いずれも旭硝子(株)製)が例示される。
[0028]
The lower support brick 32 is used not only to connect the uprising pipe 16 and the downfalling pipe 18 to the upstream guide pit 22 and the downstream guide pit 24 respectively, but also mounted on the upstream guide pit 22 and the downstream guide pit 24 Refractory bricks provided to support the riser 16, the downcomer 18 and the vacuum housing 12 and to support the load of the pipeline, preferably the riser 16, the vacuum degassing vessel 14 and the downcomer described above The dense refractory brick used for 18 is good.
In addition, a seal material 38 is filled in the contact portion between the decompression housing 12 and the lower end portion of the lower receiving brick 32 and is air-sealed. When the lower receiving brick 32 supports the decompression housing 12, a slight gap is generated in the contact portion to prevent air from flowing into the decompression housing 12 and not being decompressed. The sealing material 38 is not particularly limited, as long as it has high temperature heat resistance and is air-sealed by the above-mentioned mortar or castable material. As an example, air set mortar, tight seal and Asahi Hibond (all manufactured by Asahi Glass Co., Ltd.) are exemplified.

【符号の説明】
10、110、 減圧脱泡装置
12、112 減圧ハウジング
12c、112c 吸引口
14、114 減圧脱泡槽
14a,14b、114a、114b 吸引口
14s 上部空間
16、116 上昇管
18、118 下降管
20、120 溶解槽
22、122 上流案内ピット
24、124 下流案内ピット
30、130 断熱材
32 下部受けレンガ
34 水管
36a、36b バリア
38 シール材
40、42 緻密質クロム系耐火物製レンガ
G 溶融ガラス
[Description of the code]
10, 110, vacuum degassing apparatus 12, 112 vacuum housing 12c, 112c suction port 14, 114 vacuum degassing tank 14a, 14b, 114a, 114b suction port 14s upper space 16, 116 ascending pipe 18, 118 descending pipe 20, 120 Dissolution tank 22, 122 upstream guide pit 24, 124 downstream guide pit 30, 130 heat insulating material 32 lower receiving brick 34 water pipe 36a, 36b barrier 38 sealing material 40, 42 dense chromium refractory brick G molten glass

JP17323298A 1998-06-19 1998-06-19 Vacuum degassing equipment for molten glass Expired - Fee Related JP3785810B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17323298A JP3785810B2 (en) 1998-06-19 1998-06-19 Vacuum degassing equipment for molten glass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17323298A JP3785810B2 (en) 1998-06-19 1998-06-19 Vacuum degassing equipment for molten glass

Publications (3)

Publication Number Publication Date
JP2000007345A JP2000007345A (en) 2000-01-11
JP2000007345A5 true JP2000007345A5 (en) 2004-12-09
JP3785810B2 JP3785810B2 (en) 2006-06-14

Family

ID=15956607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17323298A Expired - Fee Related JP3785810B2 (en) 1998-06-19 1998-06-19 Vacuum degassing equipment for molten glass

Country Status (1)

Country Link
JP (1) JP3785810B2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003108426A (en) 2001-09-28 2003-04-11 Canon Inc Information providing server, communication terminal, method of controlling the communication terminal, and information providing system
DE60217599T2 (en) 2001-09-28 2007-10-25 Asahi Glass Co., Ltd. Vacuum degassing apparatus for molten glass
WO2007020773A1 (en) * 2005-08-17 2007-02-22 Asahi Glass Company, Limited Conduit structure for molten glass
JP5067371B2 (en) * 2006-08-29 2012-11-07 旭硝子株式会社 Molten glass conduit structure and vacuum degassing apparatus using the conduit structure
JP2021054665A (en) * 2019-09-27 2021-04-08 日本電気硝子株式会社 Apparatus and method for manufacturing glass article

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