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US 6,308,534 B1Granted
Vacuum degassing apparatus for molten glass
AssigneeAsahi Glass Company, Limited
InventorsYusuke Takei, Shigekuni Inoue, Michito Sasaki, Yasuharu Hirabara, Atsushi Tanigaki, Mitsuo Sugimoto
Life of this patent
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Abstract
Molten glass has a liquid level located at a higher level than lower ends of an uprising pipe and a downfalling. In addition, a contacting portion of the uprising pipe or the downfalling pipe and a brick receiver on an upstream or downstream pit for supporting the uprising or downfalling pipe, or a joint in the brick receiver is filled with sealing material.
Claims13
A vacuum degassing apparatus for molten glass, comprising:
- a vacuum housing which is evacuated to be depressurized therein;
- a vacuum degassing vessel made of refractory material, which is provided in the vacuum housing to vacuum-degas molten glass;
- an uprising pipe made of refractory material, which connects to the vacuum degassing vessel in the vacuum housing, and sucks and draws up undegassed molten glass to introduce the undegassed molten glass into the vacuum degassing vessel;
- a downfalling pipe made of refractory material, which connects to the vacuum degassing vessel in the vacuum housing and draws down the degassed molten glass from the vacuum degassing vessel to discharge the degassed molten glass;
- an upstream pit located under a lower edge of the uprising pipe and which supports the vacuum housing and the uprising pipe and connects to the uprising pipe;
- a brick receiver external to the upstream pit and between the uprising pipe and the upstream pit;
- and
- a downstream pit located under a lower edge of the downfalling pipe and which supports the vacuum housing and the downfalling pipe and connects to the downfalling pipe;
- wherein the lower edge of the uprising pipe and the lower edge of the downfalling pipe are positioned at a lower level than a liquid level of the undegassed molten glass when depressurization starts.
6 more elements
A vacuum degassing apparatus for molten glass, comprising:
- a vacuum housing which is evacuated to be depressurized therein;
- a vacuum degassing vessel made of refractory material, which is provided in the vacuum housing to vacuum-degas molten glass;
- an uprising pipe made of refractory material, which connects to the vacuum degassing vessel in the vacuum housing, and sucks and draws up undegassed molten glass to introduce the undegassed molten glass into the vacuum degassing vessel;
- a downfalling pipe made of refractory material, which connects to the vacuum degassing vessel in the vacuum housing and draws down the degassed molten glass from the vacuum degassing vessel to discharge the degassed molten glass;
- an upstream pit located under a lower edge of the uprising pipe and which supports the vacuum housing and the uprising pipe and connects to the uprising pipe;
- a downstream pit located under a lower edge of the downfalling pipe and which supports the vacuum housing and the downfalling pipe and connects to the downfalling pipe;
- and
- a brick receiver external to the downstream pit and between the downfalling pipe and the downstream pit;
- wherein the lower edge of the uprising pipe and the lower edge of the downfalling pipe are positioned at a lower level than a liquid level of the undegassed molten glass when depressurization starts.
6 more elements
Dependencies are inferred from the claim text.