COMPRESSED AIR FOAM GENERATION

摘要

A foam generating system is disclosed that includes a liquid source providing liquid including at least one of water, an additive and a foaming agent. The system further includes a compressed gas source and a manifold coupled with the liquid source to receive liquid therefrom. A pressure control valve controls pressure of liquid flowing from the liquid source to the manifold and a plurality of foam generators fluidly coupled with the manifold. A control system is electrically coupled to the pressure control valve and each foam generator. In one implementation, the control system operates each of the foam generators to provide a first flow control state for a first type of foam output, a second flow control state for a second type of foam output and a water flow control state for liquid.

主权项

1. A foam generating system, comprising:
a liquid source providing liquid including at least one of water, an additive, and a foaming agent; a compressed gas source; a manifold coupled with the liquid source to receive the liquid therefrom, the manifold fluidly coupled to a plurality of conduits spaced apart from and fluidly isolated from one another; a pressure control valve controlling pressure of liquid flowing from the liquid source to the manifold; a plurality of foam generators fluidly coupled with the manifold and configured to be transitioned between an active state and an inactive state, each foam generator including:
a foaming chamber,a first valve assembly controlling liquid flow rate from one of the plurality of conduits to the foaming chamber,a second valve assembly controlling gas flow rate from the compressed gas source to the foaming chamber, andan output assembly fluidly coupled to the foaming chamber; and a control system electrically coupled to the pressure control valve and each foam generator of the plurality of generators, the control system transitioning each of the foam generators between the active state and the inactive state to implement one or more active generators and operating the pressure control valve dependent upon a number of the one or more active generators, the control system further operating each of the first valves and the second valves for each of the one or more active generators to provide: a first flow control state for a first type of foam output, the first flow control state defining a first setting for each of the first valve assemblies and the second valve assemblies in the one or more active foam generators; a second flow control state for a second type of foam output, the second flow control state defining a second setting for each of the first valve assemblies and the second valve assemblies in the one or more active foam generators; and a water flow control state for liquid, the water flow control state defining a third setting for each of the first valve assemblies in the one or more active foam generators with a greater level of flow than the first setting and the second setting, wherein each of the second valve assemblies prevent gas from reaching respective foaming chambers in the water flow control state.