| 摘要 |
A lens protection device for a reheating furnace is provided to prevent damage of the lens due to a temperature difference of inner and outer surfaces of the lens and prevent alien substances from sticking to the lens by ejecting air of which moisture is removed by a high temperature heat in the reheating furnace onto a surface of the lens. A lens protection device for a reheating furnace comprises: an extension pipe(210) which is installed on a see-through port(200) of the reheating furnace, and has a plurality of ejection holes(211) formed on a peripheral surface thereof; a preheating pipe(220) which is inserted onto the extension pipe to form a preheating chamber(221) on an outer peripheral surface of the extension pipe, and has a supply pipe(230) connected to one side thereof and an exhaust pipe(231) connected to the other side thereof; a first lens(240) installed on an end of the extension pipe; a supporting pipe(250) which is formed on the end of the extension pipe, and has the exhaust pipe connected to one side thereof and exhaust holes(251) formed on the other side thereof; and a second lens(260) installed on an end of the supporting pipe. |
