IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0011822
(2013-08-28)
|
등록번호 |
US-9505645
(2016-11-29)
|
우선권정보 |
JP-2011-078365 (2011-03-31) |
발명자
/ 주소 |
- Miyoshi, Wataru
- Hamamoto, Hiroaki
- Kobayashi, Suguru
- Uematsu, Toshiyuki
- Sasaki, Michito
|
출원인 / 주소 |
- Asahi Glass Company, Limited
|
대리인 / 주소 |
Oblon, McClelland, Maier & Neustadt, L.L.P.
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
It is an object of the present invention to provide a vacuum degassing apparatus configured so as to be capable of carrying out more simply exchange operation for an extension pipe made of heat-resisting metal and immersed in molten glass. The present invention includes a vacuum housing, a vacuum ve
It is an object of the present invention to provide a vacuum degassing apparatus configured so as to be capable of carrying out more simply exchange operation for an extension pipe made of heat-resisting metal and immersed in molten glass. The present invention includes a vacuum housing, a vacuum vessel, an introduction pipe and a discharge pipe which are assembled by a plurality of bricks, and an extension pipe connected to at least one of the introduction pipe and the discharge pipe and made of heat-resisting metal. The extension pipe is constituted by a base end portion, a body portion formed so as to be continuous to the base end portion, and a sealing flange extending from an outer peripheral side of the body portion.
대표청구항
▼
1. A vacuum degassing apparatus for molten glass, comprising: a vacuum housing;a vacuum vessel disposed in the vacuum housing such that molten glass is introduced into the vacuum vessel;an introduction pipe positioned in the vacuum housing and connected to an upstream side of the vacuum vessel such
1. A vacuum degassing apparatus for molten glass, comprising: a vacuum housing;a vacuum vessel disposed in the vacuum housing such that molten glass is introduced into the vacuum vessel;an introduction pipe positioned in the vacuum housing and connected to an upstream side of the vacuum vessel such that the molten glass is introduced into the vacuum vessel;a discharge pipe positioned in the vacuum housing and connected to downstream side of the vacuum vessel such that the molten glass is discharged from the vacuum vessel; andan extension pipe connected to at least one of an upstream end of the introduction pipe and a downstream end of the discharge pipe and extending through a through hole formed in an outer wall of the vacuum housing,wherein the extension pipe is made of heat-resisting metal and has a base end portion formed on one end close to the vacuum vessel, a body portion formed continuous to the base end portion, and a sealing flange extending outward from an outer periphery of the body portion and mounted to the outer wall of the vacuum housing such that the sealing flange is covering the through hole in the outer wall,the extension pipe is detachably fixed to the outer side of the outer wall through a fixing structure disposed on of the sealing flange such that the base end portion of the extension pipe is received in an opening formed at the upstream end of the introduction pipe or the downstream end of the discharge pipe, andthe sealing flange contacts with the outer wall. 2. The apparatus according to claim 1, wherein the introduction pipe is an uprising pipe through which the molten glass flows upward, and the discharge pipe is a down falling pipe through which the molten glass flows downward;the base end portion is formed on an upper end of the extension pipe, the body portion is formed continuous to the base end portion and extending downward, and the sealing flange is positioned at a lower end of at least one of the uprising pipe and the downfalling pipe; andthe opening is formed at a lower end of the uprising pipe or a lower end of the downfalling pipe. 3. The apparatus according to claim 2, wherein the uprising pipe is constituted by assembling inner armoring bricks in contact with the molten glass and outer armoring bricks disposed outside the inner armoring bricks in a radial direction of the uprising pipe, the inner armoring bricks comprise at least one end brick at the lower end of the uprising pipe; the downfalling pipe is constituted by assembling inner armoring bricks in contact with the molten glass and outer armoring bricks disposed outside the inner armoring bricks in a radial direction of the downfalling pipe, the inner armoring bricks comprise at least one end brick at the lower end of the downfalling pipe;the outer wall of the vacuum housing has an extended portion extending more inward than the outer armoring bricks in the radial direction of the uprising pipe or the downfalling pipe such that the outer wall is brought into contact with the lower end of the uprising pipe or the lower end of the downfalling pipe; andthe at least one end brick positioned at the lower end of the uprising pipe or the lower end of the downfalling pipe is supported by the extended portion of the outer wall. 4. The apparatus according to claim 2, wherein the extension pipe is brought into contact with the lower end of the uprising pipe or the lower end of the downfalling pipe. 5. The apparatus according to claim 2, wherein the sealing flange is formed in a dish shape having an outer peripheral edge portion on an outer periphery, and the outer peripheral edge portion is mounted to the outer wall by the fixing structure. 6. An apparatus comprising: a glass melting furnace;the vacuum degassing apparatus of claim 2;a forming device to form molten glass which is vacuum degassed; andan annealing device to anneal glass. 7. A process comprising: melting a glass raw material to obtain molten glass;vacuum-degassing the molten glass by the vacuum degassing apparatus of claim 2;forming the molten glass which is vacuum degassed; andannealing the formed glass. 8. The apparatus according to claim 1, wherein the introduction pipe is constituted by assembling inner armoring bricks in contact with the molten glass and outer armoring bricks disposed outside the inner armoring bricks in a radial direction of the introduction pipe, the inner armoring bricks comprise at least one end brick at the upstream end of the introduction pipe; the discharge pipe is constituted by assembling inner armoring bricks in contact with the molten glass and outer armoring bricks disposed outside the inner armoring bricks in a radial direction of the discharge pipe, the inner armoring bricks comprise at least one end brick at the downstream end of the discharge pipe;the outer wall of the vacuum housing has an extended portion extending more inward than the outer armoring bricks in the radial direction of the introduction pipe or the discharge pipe such that the outer wall is brought into contact with the upstream end of the introduction pipe or the downstream end of the discharge pipe; andthe at least one end brick at the upstream end of the introduction pipe or the downstream end of the discharge pipe is supported by the extended portion of the outer wall. 9. The apparatus according to claim 1, wherein the introduction pipe or the discharge pipe comprises at least one end brick which has a through hole formed therein such that the molten glass passed through the through hole formed in the at least one end brick; the through hole formed in the at least one end brick has a large diameter portion formed in an opening thereof close to the outer wall and a small diameter portion formed so as to be continuous to the large diameter portion; andthe extension pipe has an expanded portion expanding outward in a position close to the base end portion thereof in a deepest area of the large diameter portion. 10. The apparatus according to claim 9, wherein the small diameter portion comprises a protection member made of heat-resisting metal disposed on an inner peripheral surface of the small diameter portion so as to cover the inner peripheral surface. 11. The apparatus according to claim 1, wherein the introduction pipe or the discharge pipe has an end surface at the upstream end of the introduction pipe or the downstream end of the discharge pipe such that the end surface is flush with the outer surface of the outer wall, which surrounds the introduction pipe or the discharge pipe in a radial direction of the introduction pipe or the discharge pipe; and the end surface is covered by the sealing flange fixed to the outer wall of the vacuum housing. 12. The apparatus according to claim 1, wherein the sealing flange is formed in a dish shape having an outer peripheral edge portion on an outer periphery, and the outer peripheral edge portion is mounted to the outer wall by the fixing structure. 13. The apparatus according to claim 1, wherein the extension pipe has a backup flange formed at a position closer to the base end portion than the sealing flange, the introduction pipe or the discharge pipe has an end surface at the upstream end of the introduction pipe or the downstream end of the discharge pipe, andthe end surface is covered by the backup flange. 14. The apparatus according to claim 1, wherein the introduction pipe and the discharge pipe are connected to the vacuum vessel in a vertical direction. 15. The apparatus according to claim 1, wherein the extension pipe is brought into contact with the upstream end of the introduction pipe or the downstream end of the discharge pipe. 16. An apparatus comprising: a glass melting furnace;the vacuum degassing apparatus of claim 1;a forming device to form molten glass which is vacuum degassed; andan annealing device to anneal glass. 17. A process comprising: melting a glass raw material to obtain molten glass;vacuum-degassing the molten glass by the vacuum degassing apparatus of claim 1;forming the molten glass which is vacuum degassed; andannealing the formed glass. 18. The apparatus according to claim 1, wherein a tip of the base end portion of the extension pipe does not contact with the introduction pipe or the discharge pipe. 19. The apparatus according to claim 1, wherein the extension pipe is detachable from the outer wall by removing the fixing structure. 20. The apparatus according to claim 1, wherein the outer wall has a tapped hole, the fixing structure is a bolt, and the extension pipe is fixed by screwing the bolt into the tapped hole.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.