High flow rate foam generating apparatus

摘要

A foam generating apparatus provides a high-quality mixing of solution and air to produce foam without restricting the flow of liquid through apparatus. An air manifold has passages allowing the flow of water or solution through the apparatus and also features apertures that introduce pressurized air in a parallel flow with the water or solution introduced into the exit chamber. The cross-sectional area of the passages is at least as great as the water or solution inlet, and thus the device does not significantly restrict flow of liquid, even in the case where a straight flow of water or solution without mixed air is desired.

主权项

1. A foam generating apparatus, comprising:
a. an entry chamber comprising a first entry chamber diameter and a second entry chamber diameter, wherein the second entry chamber diameter is wider than the first entry chamber diameter; b. an exit chamber comprising a first exit chamber diameter and a second exit chamber diameter, wherein the second exit chamber diameter is wider than the first exit chamber diameter; c. an air manifold separating the entry and exit chamber, comprising:
i. a back air manifold face adjacent the second entry chamber diameter;ii. a front air manifold face adjacent to the second exit chamber diameter, wherein the front and back air manifold faces connect to form a hollow air chamber therebetween enclosed at a periphery of the air manifold;iii. an air inlet connected to the hollow air chamber;iv. a plurality of liquid passages passing through the front and back air manifold faces whereby liquid may pass from the entry chamber into the exit chamber without entering the air manifold, to result in a plurality of liquid streams in the exit chamber; andv. a plurality of air apertures positioned around and between the plurality of liquid passages to inject air around and between the plurality of liquid passages; d. a source of pressurized liquid connected to the entry chamber; e. a liquid valve positioned to control a flow of liquid from the source of pressurized liquid into the entry chamber; f. a source of pressurized gas connected to the air inlet; and g. an air valve positioned to control a flow of gas from the source of pressurized gas to the air inlet.