Optical monitoring system for observing internal conditions in the blast zone of a blast furnace

摘要

The invention relates to an optical monitoring system (26) for monitoring operating conditions in a blast furnace vent zone. This system comprises a light deflection device (40) with an observation display (28) disposed on a first face (46) of the light deflection device (40) and an optical sensor (30) disposed on a second face (46). 48) of the light deflection device (40). A light deflector (41) is disposed within the light deflection device (40) to direct incident light from the vent to the observation display (28) and the optical sensor (30). the light deflection device (40) comprises a housing (56) with a spherical body (60) rotatably disposed therein. the spherical body (60) comprises three passages: a first passage (62) which is, when the light deflection device (40) is connected to the rear portion of the blow tube (18), facing the vent to allow the incident light from the vent zone enter the spherical body (60); a second passage (70) facing the observation display (28); a third passage (72) facing the optical sensor (30). the first, second and third passages (62, 68, 72) are configured to be within the spherical body (60). the light deflector (41) is disposed within the spherical body (60) at the intersection of the first, second and third passages (62, 68, 72). furthermore, the light deflection device (40) comprises an opening (76) in a third face (50) of the housing (56) for accessing the spherical body (60) to allow rotation of the spherical body (60) within the housing (56). the spherical body (60) comprises a socket (78) facing the opening (76) on the third face (50). aperture (76) is a guide slot (86) whose width is substantially the same as a diameter of socket (78).