Abstract:
A foam-applying nozzle (100) including a generally hollow housing (102). An eductor (108) disposed in the housing (102) has a generally hollow body (110) with a wall (120), the hollow of the body (110) forming an eduction chamber (116). An eductor inlet (115) and an opposing eductor outlet (117) are in fluid communication with the eduction chamber (116). A plurality of jet inlets (118) extend into the wall (120) of the body (110), the jet inlets (118) terminating in jet ports (122) that are in fluid communication with the eduction chamber (116).
Abstract:
A fire suppression apparatus for fighting fires from a vehicle configured for flight is disclosed, comprising a foam and water held in separate containers aboard the vehicle that when mixed forms a fire retardant, a pump driven by an electric motor to pressurize the fire retardant, the pump including an air induction valve where air is drawn into a suction end of the pump and pressurized together with the fire retardant, and an aimable boom connected to the pump by a conduit, the boom including a nozzle on a distal end of the boom from which the pressurized fire retardant and air is dispensed toward a target.
Abstract:
A one-touch Compressed Air Foam System (CAFS) is provided that allows for a simplified user interface and simplified user operation. The user interface allows the CAFS to activate upon a single press of a single button. An electronic controller checks that several CAFS device parameters show that the CAFS is capable of operating. The controller gathers the device parameter data from a diagnostic system present in the CAFS that gives data pertaining to whether water is flowing, whether foam concentrate is present in the system, whether foam is flowing, and whether the temperature of an air compressor is within a safe range for operation. If the above device parameters are found to be in condition for safe operation of the CAFS, the controller will start and maintain operation until either one of the above falls out of tolerance or the user initiates a shut down of the CAFS.
Abstract:
A foam expansion tube for a fire fighting nozzle includes a tubular body with a longitudinal axis and a passageway extending there through along the longitudinal axis for directing a foam and water mixture from a fire fighting nozzle. The passageway has a larger diameter than the outlet of the nozzle to provide an expansion tube for the foam/water mixture. The tubular body further includes an inlet end and an outlet end, with the inlet end having an inlet adapted for mounting to the outlet of the fire fighting nozzle for receiving the foam/ water mixture into the passageway and having at least one opening to allow air to be drawn into the passageway for mixing with the foam/water mixture flowing through the passageway. The tube further includes a structure that extends into the passageway wherein the structure separates the foam/water mixture to further enhance the expansion of the foam and water mixture.
Abstract:
Disclosed is a foam ejector for a ship, which is capable of generating and discharging fire extinguishing foam to a deck of the ship where a fire takes place, which constitutes a fixing basement to be installed at the deck of the ship, a fitting capable of performing left and right rotations about the fixing basement, an ejecting tube capable of performing up and down angular motions, and a rotational joint which is formed as a pipe connecting part of the type wherein a plug portion is inserted into a socket portion and two rows of pluralities of ball bearings for supporting rotations of the fitting and the ejecting tube are disposed within the rotational joint. Due to this structure, a relatively wide contacting and supporting area may be provided within the rotational joint so that the rotational joint can very firmly support an exhaust pressure of the fire extinguishing foam. Furthermore, it is possible to highly reduce the total overall weight of the foam ejector and thereby resulting in a considerable reduction in time and costs to be spent for the transportation and the installation of the foam ejector. Furthermore, a steering lever becomes easy and reasonable to be installed at the rotational joint and it easy to operate the foam ejector.
Abstract:
An atomizer(5) for atomizing a liquid has a gas chamber (15) adapted to be connected to a supply of gas and a liquid chamber (30) adapted to be connected to a source of liquid. A mixing tube (38) extends from the gas chamber (15) in a downstream direction, and atomizing gas flows through the tube (38) at subsonic speed. A liquid conduit (32) fluidly connects the liquid chamber (30) with the mixing tube (38) so that liquid from the conduit (32) can be entrained in the gas flow for discharging a mixture of gas and partially atomized liquid from the tube (38). The mixture then flows through an exit gap (65) to the exterior of the housing (10). The exit gap (65) has several successive shear steps (45) which contact the mixture as it flows through the gap (65) to thereby substantially fully atomize the liquid as it is being discharged from the atomizer (5). The atomizer (5) permits variations in the liquid flow rate and therewith variations in the rate at which atomized liquid is discharged from the atomizer (5) by modulating the rate at which the liquid is entrained in the gas streams while maintaining the gas stream flow rate and pressure substantially constant.
Abstract:
A firefighting nozzle (10) has a low-turbulence liquid flow channel (20) that is directed outwardly by a baffle (30). Surrounding the flow channel (20) is an annular concentrate chamber (62). The concentrate chamber (62) leads from a concentrate inlet (14) to a concentrate entry port (50) on a rearward wall (52) opposed to the baffle (30). Liquid flowing past the baffle (30) draws concentrate through the concentrate entry port (50) into the flow. The concentrate and liquid subsequently mix to produce firefighting foam.
Abstract:
The invention includes components and methodology for fixed and semi-fixed systems for extinguishing fire in large industrial flammable liquid storage tanks, including aerated foam projecting nozzles discharging substantially focused streams together with aeration chambers and risers and the formation of wand heads and wands. Specifically, the invention includes a nozzle having a tip portion, the tip portion having a stream shaper, and the stream shaper having at least four fins with a longitudinal dimension in the tip portion greater than a radial dimension in the tip portion.
Abstract:
Fixed systems and method tor extinguishing large scale industrial tank fires, with and without fixed roofs, and featuring aerated foam projecting nozzles and including fixed center directed nozzles The invention includes two connected nozzles, which project aerated foam of between in substantially focused streams and in roughly opposing directions. The two nozzles have a stream shaper in a tip portion of the nozzle with fins which terminate substantially flush with a nozzle tip solid bore discharge orifice. The two nozzles preferably are attached proximally downstream of and in fluid communication with at least one ambient air aeration chamber structure in combination with the two nozzles to produce aerated foam. A third nozzle of the fixed system is structured to discharge in a direction of within 30° of a perpendicular to the discharge axis defined by the two nozzles discharging in the roughly opposing directions.