PROTECTIVE DRIVE DEVICE FOR DAMPER OR VALVE Russian patent published in 2012 - IPC F16K31/00 F16K31/04 H02J9/06 H02H7/09 H02M7/527 

FIELD: fire fighting systems.

SUBSTANCE: invention refers to protection drive device with emergency protection circuit and can be used in firefighting and monitoring systems used in the sphere of air conditioning, heating and ventilation. Protection drive device (10) with circuit (12) of emergency protection installs damper or valve into the set position ensuring safety for regulation of volumetric gas or flowing medium flow. The important parts of the device (10) are the executing mechanism (14) with controlled electric motor (28), unit (20) of capacity storage, energy converter (22) with energy module and power unit (18). During normal operation electric current in the energy module of converter (22) is converted into lower voltage and the charge is stored in the unit (20) comprising at least one double-layer condenser. In case of voltage decrease lower the set value or in case of electric supply failure the accumulated electric charge is converted with the same energy module into higher voltage, and as a result, the electric motor (28) works until the set position ensuring safety is reached.

EFFECT: simplification and improvement of emergency protection circuit.

25 cl, 9 dwg