Patent ID: 8695380
Filing Date: 2014-04-15
Classification: C03B,F23D

Abstract:
1. A quartz glass burner, comprising: a relatively large diameter outer tube formed of quartz glass; a plurality of relatively small diameter inner tubes formed of quartz glass enclosed in the outer tube, each of the plurality of inner tubes defining a flow path of combustion assisting gas and having a tip opening defining an ejecting port ejecting combustion assisting gas, the plurality of inner tubes being arranged along a circumference of a circle with a center at a center axis of the outer tube so as to form an inner tube row, outer circumferences of the plurality of inner tubes defining a combustion gas flow path of combustion gas together with an inner circumference of the outer tube together; and a port defining member disposed at a tip of the outer tube and defining an outer shape of a combustion gas ejecting port ejecting combustion gas, the port defining member protruding from the inner circumference side of the outer tube towards the center axis side so as to block the outermost area of the combustion gas flow path including areas between the outer circumferences of the plurality of inner tubes forming the inner tube row and the inner circumference of the outer tube, wherein the port defining member has a plurality of notched portions for forming gaps between a plurality of the inner tubes forming the inner tube row, respectively.