FIELD: 3D images holographic projection devices.
SUBSTANCE: invention relates to details of devices for holographic projection of 3D images. A device for placing 3D holographic fans under the spans of bridge structures, containing a base, in the body of which an air filter and an air blower are mounted, while the air filter and the air blower are connected through an air channel, an electric winch with a cable is mounted on the lower surface of the base, the end of which is fixed on the protective screen, which can be placed on its lower side of the 3D fan, between the protective screen and the lower surface of the base, a cylindrical shell is mounted, reinforced with a spiral frame, which communicates with the air supercharger.
EFFECT: ensuring timely adjustment of the height of 3D fans under bridge spans, as well as ensuring the operation of 3D fans under bridge spans in conditions of changing wind load.
1 cl, 2 dwg
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