Fire dampers are valves used to block the passage of fumes and flames from fire zones and to meet fire resistance and fire integrity requirements for a certain period of time. In order to minimize the damage caused by fire, effective fire prevention and smoke prevention measures must be taken to control the spread of fire, and the reasonable setting of fire dampers in ventilation, air conditioning and smoke control systems plays an important role. effect.
2 Structure and working principle of fire damper
The fire damper is mainly composed of a valve body and an actuator. The valve body is composed of a casing, a flange, a blade and a blade linkage mechanism. The actuator is composed of a casing, a blade adjusting mechanism, a clutch, a temperature fuse, and the like. The actuator of the fire damper controls the rotation of the blade through a metal fusible sheet and a clutch mechanism.
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