Patent ID: 11897807
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC C  G | IPC C  G

Claim 0:
1. A porous glass base material manufacturing apparatus for an optical fiber comprising:
a liquid mass flow controller for controlling a flow rate of a raw material liquid of an organic siloxane;
a vaporizer for mixing the raw material liquid and a carrier gas to vaporize the raw material liquid to form a mixed gas in which a raw material gas and the carrier gas are mixed;
a raw material liquid nozzle for ejecting the raw material liquid into the vaporizer;
a carrier gas supply pipe for supplying the carrier gas into the vaporizer;
a raw material liquid pipe for introducing the raw material liquid supplied from the liquid mass flow controller into the raw material liquid nozzle;
a burner for combusting the mixed gas together with a combustible gas and a combustion supporting gas to produce SiO2 particles;
a mixed gas pipe for supplying the mixed gas to the burner;
an open/close valve provided on a flow path of the raw material liquid pipe; and
a purge gas supply pipe that joins the raw material liquid pipe between the open/close valve and the raw material liquid nozzle to supply purge gas.