| 摘要 |
PURPOSE:To feed the raw material gas stably, preventing the condensation of the gas in the tube after the joint part, by bubbling a part of the carrier gas in a raw material tank to form a mixture of the raw material and the carrier gas, heating the remaining part of the carrier gas at a temperature higher than the temperature of the above mixed gas and joining both gas streams. CONSTITUTION:Carrier gas supplied through the line 1 is divided into two, and passed through flow controlling devices 2, 3. The stream passed through the device 2 is introduced into the raw material tank 4 and mixed with the raw material liquid 5 in the tank to form a mixed gas, which is sent through the raw material supplying device to the reaction burner of an optical fiber preform producing apparatus. The carrier gas stream passed through the flow controlling device 3 is heated with the carrier gas heater 9 to a temperature higher than the temperature of the mixed gas and is joined with the mixed gas at the joining part 10. A mixed gas can be supplied stably with a simple structure. |
