Patent ID: 6321572
Filing Date: 2001-11-27
Classification: C03B,Y02P

Abstract:
A vacuum degassing apparatus for molten glass, comprisinga vacuum housing which is evacuated to be depressurized therein;a vacuum degassing vessel assembled by combining a plurality of refractory bricks in the vacuum housing;an uprising pipe assembled by combining a plurality of refractory bricks, the uprising pipe communicating with the vacuum degassing vessel in the vacuum housing to suck and draw up undegassed molten glass and to introduce the molten glass into the vacuum degassing vessel;a downfalling pipe assembled by combining a plurality of refractory bricks, the downfalling pipe communicating with the vacuum degassing vessel in the vacuum housing to draw down and take out the degassed molten glass; anda thermal expansion absorber, wherein said thermal expansion absorber comprises a path slider for freely sliding at least one portion of the vacuum degassing vessel in a longitudinal direction of the vacuum degassing vessel so as to absorb thermal expansion of the vacuum degassing vessel in the longitudinal direction of the vacuum degassing vessel.