Patent Application
20070187531
The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without payment of any royalties thereon or therefor.
The present invention relates to an apparatus and method to amalgamate substances. More specifically, but without limitation, the present invention relates to a fine mist fire protection/suppression system for fire extinguishment.
Fluorocarbon-based and Halon fire extinguishants are environmentally harmful because they cause depletion of the earth's ozone layer. Present U.S. law and treaty requires the phase out and replacement of such materials under the 1988 Montreal Protocol. The 1988 Montreal Protocol classified Halon as a Class I Ozone Depleting Substance (ODS), and called for limits on global production by over 100 developed nation signatories. Furthermore, the U.S. Clean Air Act Amendments of 1990 call for the ban on production of Halon in the U.S after January 1994. This law also prohibits purposeful venting and requires training personnel involved with their use to minimize their emission into the atmosphere. The U.S. Navy has responded to the requirements of these acts by prospectively prohibiting the use of ozone depleting substances and by finding and using alternative designs in fire extinguishment systems. Therefore, a need exists to replace all Halon systems, specifically for hand held fire protection/suppression systems, which currently use Halons or CO2 (Halon being an ozone-depleting chemical and CO2 acting as a global warming agent). In addition, a need exists for replacing all Halon systems and improving existing water sprinkler based systems for more effective fire extinguishment use. Halon cannot be employed in any new military systems, except via a waiver. All new civilian uses of Halon have been banned, therefore, new solutions to fire suppression are required and encouraged. Therefore, a new type of fire suppression system is needed.
Thus, there is a need in the art to provide a fire protection/suppression system for fire extinguishment without the limitations inherent in present methods.
The present invention is directed to an apparatus to amalgamate substances, particularly a fire protection/suppression system for fire extinguishment, which includes at least two substance holding tanks, an inert gas tank, an amalgamation mixing chamber, and a nozzle. The inert gas tank is in fluid communication with the at least two substance holding tanks such that when actuated, inert gas will further pressurize substances contained in the at least two substance holding tanks. The amalgamation mixing chamber is in fluid communication with the at least two substance holding tanks such that when actuated, the substances in the at least two substance holding tanks enter and mix in the amalgamation mixing chamber. The nozzle is in fluid communication with the amalgamation mixing chamber such that when actuated, the mixed substances in the amalgamated mixing chamber are discharged from the nozzle.
It is a feature of the invention to provide an apparatus to amalgamate substances that can replace existing Halon based fire extinguishing systems.
It is a feature of the invention to provide an apparatus to amalgamate substances that provides an engineered flow delivered at low pressure that uses a highly efficient process contained within a system for a desired application.
It is a feature of the invention to provide an apparatus to amalgamate substances that is a mixing device with two or more separate chambers of substances to achieve an engineered flow and to flow the entire mixture through one or more nozzles.
It is a feature of the invention to provide an apparatus to amalgamate substances that is separate, self contained or fixed for delivery of an engineered flow for a desired application or process under low pressure.
It is a feature of the invention to provide an apparatus to amalgamate substances that is a pressurized device that houses separate storage vessels that flow to a mixing chamber and the resultant mixture is discharged as an atomized combination of the stored substances through an atomizing or converging-diverging nozzle.
It is a feature of the invention to provide an apparatus to amalgamate substances that is a device that includes a mixing chamber for two or more substances and achieves a multi-phase mixture through at least one converging-diverging nozzle thereby effectuating efficient use of fully mixed agents.
These and other features, aspects and advantages of the present invention will become better understood with reference to the following description and appended claims, and accompanying drawing wherein:
The preferred embodiment of the present invention is illustrated by way of example below and in
In the discussion of the present invention, the invention will be discussed in a fire extinguishant environment; however, this invention can be utilized for any type of need that requires a combination of substances to be mixed and/or reacted, specifically, but without limitation, in the amalgamation of substances and the like. Examples in which the invention may be utilized include, but without limitation, decontamination kits, agricultural pesticide dispensers, food preparation, paint sprayers, and aerosol delivery of medication.
As seen in
In the preferred embodiment, and as seen in
A noble or an inert gas 201 may be used to pressurize the inert gas tank 200 or apparatus 10 through an inert gas tank valve 205. The inert gas 201 will travel through associated inert gas piping 210. In one of the embodiments of the invention, all the inert gas piping 210 has substantially the same or equal radius. The inert gas tank 200 may be in fluid communication with inert gas check valves 215. Inert gas check valves 215 are not needed in some applications, but are shown and illustrated for complete clarity. The inert gas check valves 215 may be in fluid communication with piping 220 which leads to the filling chambers 500 and/or substance holding tanks 100. When the inert gas check valves 215 are not used or are in the open position, inert gas 201 from the inert gas tank 200 will fill the substance holding tanks 100 and further pressurize the contained substances 101 in the substance holding tanks 100. For fire extinguishing purposes, the preferred inert gas 201 is nitrogen and is pressurized to about 20 to about 60 psi such that all substances contained in substance holding tanks 100 are evenly expelled.
In the preferred embodiment, once the system is pressurized, specifically the inert gas tank 200, operation results from actuation of the inert gas check valves 215 and the tank valves 600. If there are no valves in the apparatus 10 then initial pressurization will actuate operation of the apparatus 10. The inert gas check valves 215, the tank valves 600, or any series of valves may be used to regulate the flow of the separate substances 101 to the amalgamation mixing chamber 300. In the preferred embodiment, each substance holding tank 100 has a corresponding tank valve 600. These tank valves 600, as with any other valves used in the apparatus 10 may be operated automatically, manually, or utilizing any method practicable. Furthermore, the described valves as well as any other valves potentially used may start, stop or restart the apparatus 10 and/or its flow.
In operation, when the tank valves 600 and inert gas check valves 215 are actuated or opened, inert gas 201 starts to expand and push the substances 101, through piping 120, through the tank valves 600 and into designed ratioed amalgamation mixing chamber piping 305. In one of the embodiments, all the amalgamation mixing chamber piping 305 has substantially the same or equal radius. Substances 101 that were stored in the substance holding tanks 100 are now flowing by proper ratio through amalgamation mixing chamber piping 305 and into the amalgamation mixing chamber 300. The substance holding tanks 100 may also be ratioed and designed such that the entire contents (all the substances 101) will deplete upon actuation of the apparatus 10 and/or maximum system efficiency is achieved. In one of the fire extinguishment embodiments of the invention, amalgamation mixing chamber piping 305 and substance holding tanks 100 are ratioed such that the mixed substances or mixture 301 has a two to one ratio of acetic acid to bicarbonate. The amalgamation mixing chamber piping 305 and substance holding tanks 100 may be ratioed to achieve any desired ratio. After the substances 101 enter the amalgamation mixing chamber 300, a mixture 301 of the substances 101 is then created in the amalgamation mixing chamber 300 and is discharged through the nozzle 400. Only one nozzle 400 is shown, however, more nozzles can be utilized. The preferred nozzle 400 is a converging-diverging (C-D) nozzle. When the inert gas check valves 215 and the tank valves 600 are not used or are in the open position, initial pressurization of the apparatus 10 propels the stored substances 101 into the amalgamation mixing chamber 300, creating a mixture 301, which is then propelled out the nozzle 400.
The apparatus to amalgamate substances 10 may operate at low pressures, typically about 20 to about 60 psi may be used for pressurization. However, higher pressures may be used for quicker discharge times.
The apparatus to amalgamate substances 10 may be used as a hand held fire extinguisher or where a separate self-contained fire suppression system is required. As stated above it can be utilized in any system which requires the mixing of two or more substances. The invention may be in a self contained unit or part of a larger apparatus.
The method to amalgamate substances includes pressurizing contained substances via a noble or inert gas, actuating the contained substances such that the contained substances are mixed, then discharged through a nozzle. The substances are discharged by the apparatus 10 through a combination of initial pressure and gases produced by the mixing of the stored substances in the amalgamation mixing chamber 300.
When introducing elements of the present invention or the preferred embodiment(s) thereof, the articles “a,” “an,” “the,” and “said” are intended to mean there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements.
Although the present invention has been described in considerable detail with reference to certain preferred embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the preferred embodiment contained herein.
