Focused stream, aerated foam projecting nozzle including fixed wand system and method as well as possibly portable center pointing nozzle
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.
1. A nozzle for projecting aerated fire fighting foam in a substantially focused stream, the nozzle comprising:
a cylindrical tip portion defining a longitudinal axis and terminating the nozzle at an outermost end, the cylindrical tip portion including an inner wall, the cylindrical tip portion having a stream shaper,
wherein the stream shaper has a plurality of fins with a longitudinal dimension in the cylindrical tip portion greater than a radial dimension in the cylindrical tip portion,
wherein an end of each of the plurality of fins is positioned substantially flush with the outermost end of the nozzle,
wherein each of the plurality of fins is positioned in the cylindrical tip portion to span from the longitudinal axis to the inner wall of the cylindrical tip portion; and
a tapered swedge down portion comprising a first end and a second end, the second end being connected to the cylindrical tip portion, an opening at the first end being larger than an opening at the second end,
wherein the tapered swedge down portion is attached by a conduit to, and proximally downstream of, an ambient air aeration chamber, the conduit structured to provide substantially open, unobstructed flow upstream of the plurality of fins for at least a distance of a diameter of the outermost end, and
wherein the tapered swedge down portion does not include the stream shaper.
2. The nozzle of claim 1 , wherein the plurality of fins are greater than four fins; and
wherein the plurality of fins have the longitudinal dimension greater than twice the radial dimension.
3. The nozzle of claim 2 , structured to project between 100 gpm (gallons per minute) and 900 gpm (gallons per minute) of the aerated fire fighting foam at 100 psi (pounds per square inch).
4. The nozzle of claim 1 , 2 , or 3 , wherein the outermost end comprises a solid bore discharge orifice.
5. The nozzle of claim 4 , wherein the ambient air aeration chamber in combination with the nozzle is structured to project foam with a volume expansion ratio of between 2:1 and 8:1.
6. The nozzle of claim 4 , wherein the ambient air aeration chamber in combination with the nozzle is structured to project foam with a volume expansion ratio of between 3:1 to 5:1.
7. The nozzle of claim 4 , structured together with the ambient air aeration chamber to attach proximate a top of an at least 100 foot diameter industrial tank wall.
8. The nozzle of claim 7 , in fluid communication with a riser attached to or proximate an at least 100 foot diameter industrial tank wall.
9. The nozzle of claim 1 , wherein the plurality of fins extends along an entirety of the cylindrical tip portion.
10. The nozzle of claim 1 , wherein the nozzle structured to project into an atmosphere from the outermost end at least 100 gallons per minute (gpm) aerated fire fighting foam at at least 100 pounds per square inch (psi).
11. The nozzle of claim 1 , wherein the plurality of fins comprise at least four fins.