GB2265085A - Hyperbaric fire extinguisher - Google Patents
Hyperbaric fire extinguisher Download PDFInfo
- Publication number
- GB2265085A GB2265085A GB9205997A GB9205997A GB2265085A GB 2265085 A GB2265085 A GB 2265085A GB 9205997 A GB9205997 A GB 9205997A GB 9205997 A GB9205997 A GB 9205997A GB 2265085 A GB2265085 A GB 2265085A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hyperbaric
- fire extinguisher
- pressure
- valve
- fire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C5/00—Making of fire-extinguishing materials immediately before use
- A62C5/02—Making of fire-extinguishing materials immediately before use of foam
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C13/00—Portable extinguishers which are permanently pressurised or pressurised immediately before use
- A62C13/62—Portable extinguishers which are permanently pressurised or pressurised immediately before use with a single permanently pressurised container
- A62C13/64—Portable extinguishers which are permanently pressurised or pressurised immediately before use with a single permanently pressurised container the extinguishing material being released by means of a valve
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
A hyperbaric fire extinguisher, has a cylinder 1, control valve 2, fire extinguishing agent 21, water 22, propellant gas 23. flow control orifice 20 and venturi nozzle 18, and is used for extinguishing fires in hyperbaric conditions. The cylinder 1 and valve 2 is made to hold the internal pressure of its contents and withstand external hyperbaric pressures. When opening the control valve 2 the propellant gas forces the contents out of the cylinder 1. The fire extinguishing agent 21 and water 22 and external atmosphere is mixed to produce a foam by the venturi nozzle 18 and mixer 27 regardless of the change in external hyperbaric pressure, which gives a liquid jet for extinguishing fires. <IMAGE>
Description
KYPThRÀP IC FIRE LXTINGUISHER is invention is of a hyperbaric fire extinguisher, that is a fire extinguisher that operates in ambient pressures greater than one barometric atmosphere.
Fire extinguishers are commonly used for the extinguishing of fires in one barometric atmosphere. The hyperbaric fire extinguisher is designed with a higher pressure holding and withstanding external pressure cylinder for use on fires where the ambient pressure may be greater than one barometric atmosphere, for example in divers decompression chambers or tunnel workers cassion chambers etc.
The present invention of a hyperbaric fire extingiiisher includes a higher pressure cylinder, pressure control valve, fire extinguishing agent, propellant gas, syphon tube, a foam forming venturi nozzle, pressure indicating gauge and pressure relief valve, where the charged propell.ant gas pressure is greater than the external hyperbaric pressure and is propelled en the the pressure valve is opened, forcing the extinguishing agent through the syphon tube and venturi to the external hyperbaric atmosphere, which in turn airates with the ambient hyperbaric atmosphere causing the production of a fire extinguishing fa.
A specific embodiment of the hyperbaric fire extinguisher invention will no be described by way of example with reference to the accompanying cross-section drawing in which: Referring to the drawing, the hyperbaric fire extinguisher cotiprises of a high pressure cylinder 1 which is sealed by means of a pressure control valve 2 and sealing gasket 13.
The cylinder 1 contains a fire extinguishing agent 21 mixed it water 22 and pressurised with a propellant gas 23.
The pressure control valve 2 consists of the valve bodv 2, valve stem 4, stem seal 24, valve seal 3, spring 7, spring retainer plug 8 and seal 12, valve control handle 5 with hinge pin 25 and lower handle 6. A flow restricting orifice 20 and syphon tube 19 is fitted on the inside of the valve 2.
A pressure indicating gauge 10 and safety pressure relief valve 9 is fitted to the spring retainer plug 8, with pilot hole 11.
The o-utlet tube 16 is connected to the pressure valve 2 by means of a lock nut 15 and coupling 14 with seal 26. At the end of the outlet tube 16 is the venturi base 17 and venturi nozzle 18
The cylinder 1 while at one barometric atmosphere is partially filled to 8% of its volume with the fire extinguishing agent 21, partially filled with a further 47? of its volume with water 22 and then forcibly pressurised with a propellant gas 23 for the remaining 25% of its volume to a pressure which is substantially greater than the ambient hyperbaric pressure that the hyperbaric fire extinguisher is to be used in.
The valve stem 4 is held in place by the spring 7 and maintains a pressure seal on the valve seal 3.
The pressure in the cylinder 1 is shown on the pressure indicator gauge 10 by means of the internal pressure travelling up the syphon tube 19, through the flow restricting orifice 20 and through the pilot hole 11.
5y the same means the pressure is forced upon the safety pressure relieve valve 9, where the pressure is automatically relieved if the pressure exceeds the pre-set pressure of the pressure relief valve 9.
Upon the action of squeezing the lower handle 6 and valve control handle 5, the control handle 5 swings in an arched motion on the hinge pin 25, which in turn pushes the valve stem 4 in a horizontal motion, opening the valve seal 3, allowing the propellant gas 23 to force a mixture of the extinguishing agent 21 and water 22 up the syphon tube 19, through the flow restricting orifice 20, past the valve seat 3 up through the outlet pipe 16 and venturi nozzle 18. The stem seal 24 prevents leakage passIng the rear of the valve stem 4. As the mixture of fire extinguishing agent 21 and water 22 pass the venturi base 17, the external ambient gas is drawn into the venturi base 17 and causes the production of foam by the mixer unit 27 mixing the ambient gas and the mixture of fire extinguishing agent 21 and water 22.
The flow restricting orifice 20 is sized to restrict the flow of the fir extinguishing agent 2i and water 22 mixture while being forced through the pressure valve 2 by the propellant gas 23, depending on the flow requirement.
The mixture of the ambient gas, fire extinguishing agent 21 and water 22 exits the venturi nozzle 18 in a uniformed foam mixture in a straight lined liquid jet to extinguish firs.
The outlet tube 16 may be snivelled on the coupling 14 to aim at the fire.
Upon the release of the squeezing of the valve handle 5 and lower handle 6, the spring 7 returns the valve stem 4 back to its origInal position closing the valve seal 3.
Claims (5)
1 A hyperbaric fire extinguisher coiaprising a high pressure cylinder, fire extinguishing agent, propellant as, pressure control valve and a foam making venturi nozzle, which is means for producing a uniformed foam i,tixtu-e in a straight lined liquid jet for the extinguishing of fires in pressures greater tn one barometric atmosphere.
2 A hyperbaric fire extinguisher as claimed in claim 1 wherein the flow is restricted by means of sized orifice, depending on the flow requirements.
3 A hyperbaric fire extinguisher as claimed in claim 1 or claim 2, wherein the pressure cylinder and pressure valve are provided with means for withstanding external hyperbaric pressures.
4 A hyperbaric fire extinguisher as claimed in claim 1 or claim 2 or claim j wherein a venturi nozzle and mixer is provided to produce a foam mixture in ambient pressures greater than one barometric atmosphere.
5 A hyperbaric fire extinguisher as claimed in any preceding claim wherein the mixture of 8% fire extinguishing agent, 67% water and 25% propellant gas or thereof being the calculated r,leasuremezrts,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9205997A GB2265085B (en) | 1992-03-19 | 1992-03-19 | Hyperbaric fire extinguisher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9205997A GB2265085B (en) | 1992-03-19 | 1992-03-19 | Hyperbaric fire extinguisher |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9205997D0 GB9205997D0 (en) | 1992-04-29 |
| GB2265085A true GB2265085A (en) | 1993-09-22 |
| GB2265085B GB2265085B (en) | 1996-07-03 |
Family
ID=10712449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9205997A Expired - Fee Related GB2265085B (en) | 1992-03-19 | 1992-03-19 | Hyperbaric fire extinguisher |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2265085B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1302710A3 (en) * | 2001-10-09 | 2003-08-13 | L.P.G. Tecnicas en Extincion de Incendios, S.A. | Valve for recipient containers for high pressure extinguishing agents |
| CN101979999A (en) * | 2010-11-04 | 2011-02-23 | 西安近代化学研究所 | Solid propellant depressurizing and extinguishing device |
| US10463898B1 (en) | 2018-07-19 | 2019-11-05 | Jaco du Plessis | Expandable fire-fighting foam system, composition, and method of manufacture |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1176377A (en) * | 1966-03-10 | 1970-01-01 | Celestin Herbline | Improvements in or relating to Fire Extinguishers |
| GB2031724A (en) * | 1978-08-14 | 1980-04-30 | Cummins M A | Foam generating fire fighting device |
| FR2543840A1 (en) * | 1983-04-05 | 1984-10-12 | Heuliez Dea | Static fire-extinguishing device using a high-swelling foam |
-
1992
- 1992-03-19 GB GB9205997A patent/GB2265085B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1176377A (en) * | 1966-03-10 | 1970-01-01 | Celestin Herbline | Improvements in or relating to Fire Extinguishers |
| GB2031724A (en) * | 1978-08-14 | 1980-04-30 | Cummins M A | Foam generating fire fighting device |
| FR2543840A1 (en) * | 1983-04-05 | 1984-10-12 | Heuliez Dea | Static fire-extinguishing device using a high-swelling foam |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1302710A3 (en) * | 2001-10-09 | 2003-08-13 | L.P.G. Tecnicas en Extincion de Incendios, S.A. | Valve for recipient containers for high pressure extinguishing agents |
| ES2214926A1 (en) * | 2001-10-09 | 2004-09-16 | L.P.G. Tecnicas En Extincion De Incendios, S.A. | Valve for recipient containers for high pressure extinguishing agents |
| CN101979999A (en) * | 2010-11-04 | 2011-02-23 | 西安近代化学研究所 | Solid propellant depressurizing and extinguishing device |
| CN101979999B (en) * | 2010-11-04 | 2011-12-28 | 西安近代化学研究所 | Solid propellant depressurizing and extinguishing device |
| US10463898B1 (en) | 2018-07-19 | 2019-11-05 | Jaco du Plessis | Expandable fire-fighting foam system, composition, and method of manufacture |
| US11247085B2 (en) | 2018-07-19 | 2022-02-15 | Jaco du Plessis | Self-expanding fire-fighting foam solution |
| US11794045B2 (en) | 2018-07-19 | 2023-10-24 | Jaco du Plessis | Expandable fire-fighting foam system, composition, and method of manufacture |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9205997D0 (en) | 1992-04-29 |
| GB2265085B (en) | 1996-07-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20080319 |