DEVICE FOR OBSERVING INSIDE OF FURNACE UNDER HIGH TEMPERATURE ENVIRONMENT

摘要

PROBLEM TO BE SOLVED: To allow a CCD camera to be used to observe continuously a state of the inside of a furnace under a high temperature environment such as an electric furnace and a coke oven by cooling efficiently the CCD camera. ;SOLUTION: Cooling water supplied from a supply water and supply gas device is led in a spiral tube 35 formed between a 1st inner cylinder 23 and a 2nd inner cylinder 26, the water is discharged to a tip inside of an outer cylinder 21 while being fed in spiral therein and returned to a cooling section via a cylindrical space formed between the 1st inner cylinder 23 and the outer cylinder 21. A cooling gas fed from the supply water and supply gas device is led to a space formed between the 2nd inner cylinder 26 and a 3rd inner cylinder 30 and in the inside of the 3rd inner cylinder 30 respectively and discharged to the outside of the outer cylinder 21 from a supervisory window 31.;COPYRIGHT: (C)1997,JPO