Air regulating device for ventilating duct

The utility model relates to air regulating equipment, in particular to an air regulating device for a ventilating duct. The air regulating device comprises a valve plate and is characterized in that the valve plate comprises a plurality of small valve plate bodies with the same size, the small valve plate bodies are in linkage with a connection rod through connection shafts, and the small valve plate bodies are of a multi-blade-type structure. The multi-blade-type valve plate structure is adopted by the air regulating device, the air regulating device is simple and exquisite in structure, small in flow resistance, flexible in opening and closing, convenient to maintain and the like, the rotating space is greatly reduced, the rotating torque is also reduced, the requirement for a driving device is correspondingly reduced, the cost is saved, the structure of the air regulating device is reliable, and the air regulating device is economical and practical. The installation space required by the device is small,