| 摘要 |
PURPOSE: A ventilator maintaining protection device in a fire tunnel is provided to prevent a ventilator from being damaged or being transformed by fire heat by covering the lower part of a ventilator when the fire is generated in the tunnel. CONSTITUTION: A ventilator maintaining protection device in a fire tunnel comprises a housing (110), a winding shaft (120), a driving motor (130), a power transmission unit (140), and a guide unit (150). A connection flange (111) is protruded on the upper end of the housing, and the housing is connected to an anchor bolt of a tunnel ceiling. The winding shaft is rotatably connected to the inside of the housing and a fire prevention shutter (121) is wound. The guide unit is formed as a U-shape in order to guide the fire prevention shutter.
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