Patent
Nozzle and method for generating foam
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TLDR
In this paper, a method for generating foam is described, which includes a nozzle body, a nozzle inlet, an orifice, a gas inlet and an impingement pin and a nozzle outlet.Abstract:
A nozzle and method for generating foam is disclosed which includes a nozzle body, a nozzle inlet, an orifice, a gas inlet, an impingement pin and a nozzle outlet. The nozzle body has upstream and downstream ends and an inner wall defining a passage within the nozzle body. The nozzle inlet at the upstream end of the nozzle body permits introduction of a liquid foam producing agent into the passage. The foam producing agent then passes through the orifice, thereby forming a stream. This stream is directed past the gas inlets in the nozzle body to aspirate gas into the passage. The stream then impinges against the impingement pin which is disposed transversely across the passage. At least the upstream half of the cross-section of the impingement pin is annular so that the impingement pin disrupts the flow of the stream and splits it into secondary streams. These secondary streams pass outwardly on each side of the impingement pin and diverge with respect to each other prior to being deflected inwardly off the inner wall of the nozzle body. The nozzle outlet comprises a transverse slot disposed parallel to the impingement pin so that a thorough mixing between the gas and foam producing agent is effected prior to discharge through the nozzle outlet as foam.read more
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References
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Patent
Mechanical foam generator
TL;DR: In this article, the authors proposed a means for mechanically mixing water with a foaming agent such as saponine, "Tutogen", such as shown in U. S. Patent No. 2,088,085.
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TL;DR: In this article, a vortex chamber is defined in the nozzle body, a gas inlet tangentially communicating with the vortex chamber and a liquid inlet axially communicating with it.
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Foam generating nozzle
TL;DR: In this article, a foam generating nozzle is used for applying treating material entrained into foam to plants, where a mix of water, foam agent and treatment material is fed through a valve to the generating nozzle.