Foam generating device
First Claim
1. A device for forming foam by the Venturi effect, mixing a substance in liquid phase and a substance in gas phase, the device comprising a liquid insertion nozzle on a same axis as a Venturi stage comprising a converging portion disposed facing the nozzle, the Venturi stave having a throat of diameter "D", and a gas inlet coaxial with the nozzle and in communication with the converging portion, a gas being sucked in by the Venturi effect and directed to a mixing chamber connected to a foam outlet, wherein a diverging portion of the Venturi stage comprises at least three zones of progressive cone angles, with discontinuities between the zones, co-operating with a geometry of the diverging portion to give rise to a cavitation phenomenon, and opening out into a turbulence area of the mixing chamber, mixing between the two phases taking place in a free jet.
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Accused Products
Abstract
A device for generating foam by the Venturi effect mixes liquid and gaseous phases. The device has a liquid insertion nozzle on the same axis as a Venturi stage having a converging portion disposed facing the nozzle, a throat of diameter "D", and a gas inlet coaxial with the nozzle and in communication with the converging portion. In operation, the gas is sucked in by the Venturi effect and directed towards a mixing chamber connected to a foam outlet. Mixing between the two phases takes place in a free jet, and the diverging portion of the Venturi has at least three zones of progressive cone angles, with discontinuities between the zones giving rise to a cavitation phenomenon, and opening out into a turbulent chamber.
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Citations
13 Claims
- 1. A device for forming foam by the Venturi effect, mixing a substance in liquid phase and a substance in gas phase, the device comprising a liquid insertion nozzle on a same axis as a Venturi stage comprising a converging portion disposed facing the nozzle, the Venturi stave having a throat of diameter "D", and a gas inlet coaxial with the nozzle and in communication with the converging portion, a gas being sucked in by the Venturi effect and directed to a mixing chamber connected to a foam outlet, wherein a diverging portion of the Venturi stage comprises at least three zones of progressive cone angles, with discontinuities between the zones, co-operating with a geometry of the diverging portion to give rise to a cavitation phenomenon, and opening out into a turbulence area of the mixing chamber, mixing between the two phases taking place in a free jet.
Specification