CN1308048C - Low-pressure water spray fire extinguishing method - Google Patents
Low-pressure water spray fire extinguishing method Download PDFInfo
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- CN1308048C CN1308048C CNB021423318A CN02142331A CN1308048C CN 1308048 C CN1308048 C CN 1308048C CN B021423318 A CNB021423318 A CN B021423318A CN 02142331 A CN02142331 A CN 02142331A CN 1308048 C CN1308048 C CN 1308048C
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- Prior art keywords
- pressure
- nozzle
- gas
- water
- reducing valve
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 239000007921 spray Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007789 gas Substances 0.000 claims abstract description 48
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000011261 inert gas Substances 0.000 claims abstract description 5
- 238000005507 spraying Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 238000000889 atomisation Methods 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 230000004069 differentiation Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000009689 gas atomisation Methods 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000000699 topical effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Landscapes
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
A low-pressure water spray fire-extinguishing method mainly comprises components such as a gas storage cylinder, a water storage bottle, a control valve, a connecting pipeline and a low-pressure nozzle, wherein a high-pressure reducing valve is arranged at the outlet of the gas storage cylinder, and secondary reducing valves are respectively arranged on the connecting pipeline between the gas storage cylinder and the water storage bottle as well as between the gas storage cylinder and the nozzle, so that the jet pressure of the nozzle is constantly maintained between 0.7 and 4bar, and water spray particles as small as 10 mu m can be obtained. Compared with the prior art, the system has lower pressure, the sprayed water drops are more tiny, and the selected power source is high-pressure inert gas which can be used as a fire extinguishing agent, so that the atomization and fire extinguishing effects are better, the whole system is basically operated at low pressure, the manufacturing cost is reduced, and the installation, the use and the maintenance are also very convenient.
Description
Affiliated technical field
The present invention relates to a kind of low-pressure water spraying (being thin water smoke, as follows) method for extinguishing fire, is the improvement to existing automatic water sprinkling fire-distinguishing system.Be suitable for when stamping out a fire special facilities dangerous big, that the fire attack difficulty is big or equipment, using, also can when putting out a fire to save life and property liquid fire and electrical fire, use.
Background technology
In traditional fire-fighting system, drop diameter is greater than 1mm, mainly be the cooling effect by big water gaging and the diluting effect of combustible and the percussion of water are realized stamping out a fire, therefore fire extinguishing needs a large amount of water, and material and the equipment that is easy to badly be lost by damage by water value can not put out, as books, paper, archives and precision instrument, high voltage electric equipment and flammable liquid such as gasoline, the diesel oil etc. lighter than water, fire the time use.Therefore, people research and develop the water outlet spray fire extinguishing system, for size discrimination with drop diameter for the purpose of the difference as follows: drop diameter is called the water spray greater than 1mm; And drop diameter is called water spray between 1000 μ m～10 μ m.The water spray fire extinguish system of successfully developing on the market has multiple: distinguish from operating pressure low-pressure system (operating pressure is less than 12.1bar) is arranged, (operating pressure is 12.1～34.5bar) to medium voltage network, high-pressure system (operating pressure is greater than 34.5bar); From the objective of defense differentiation topical application system and total flooding system are arranged; From the preparation method differentiation prefabrication system and engineering system are arranged; From the fluid media (medium) differentiation single current medium system and double-current medium system are arranged.The combination of above-mentioned several classification often in actual applications.The method for designing of releasing in " heavy pressure fine spray systematic design discipline " that domestic certain city works out is exactly a kind of high pressure double fluid medium prefabricated water spray fire extinguish system.This fire extinguishing system is made up of parts such as tank, air container, check valve, header, control valve, nozzle, connecting tube, pipeline and detector, alarm controllers, wherein fill pure water or distilled water in the tank, air container fills nitrogen, and the working pressure range of air container is 12～15MPa.After detector is found out the condition of a fire, the alarm controller drive control valve makes water-nitrogen two streams with certain pressure enter nozzle by screen pack, the spiral space that surrounds along spring, nozzle and nozzle core produces high speed rotary motion under pressure, water was smashed fully after gas, water two phase flow reached the nozzle aperture, form atomic little droplet with the gases at high pressure ejection, thereby reach the fire extinguishing purpose.This fire extinguishing system has that extinguishing ability is strong, water for fire extinguishing amount and system's moisture storage capacity is few, water damage is minimum, advantage such as easy for installation.But also exist some deficiencies: when fire extinguishing beginning or water filling transition, may make pipe-line system and tank be subjected to the compression shock of maximum pressure peak value; When water spray, the pressure of spout descends with variation of gas pressure, has influenced the further raising of extinguishing ability.The Chinese invention patent application discloses a kind of sprinkling fire method for No. 01117827.2, belong to low pressure double fluid medium water spray fire extinguish system, it has a water storage apparatus, is connected to the pipe-line system of spout with it, and water is pressed onto the drive unit of spout by pipe-line system and is provided with the throttling arrangement of reduction drive unit pressure.Wherein, drive unit is made of a kind of gas that fills in the gas pressure memory that is connected with water storage apparatus by catheter pressure, throttling arrangement is arranged on the catheter pressure, gas cylinder in the gas pressure memory is connected with the catheter pressure that throttling arrangement is housed by control valve, after control valve is opened, the gases at high pressure that flow out by pressure pipeline are depressurized and reach the state of critical flow, the approximate steady state value that keeps of the pressure behind throttling arrangement by throttling arrangement the time.The gas pressure memory pressure that provides in this system surpasses 100bar, is preferably 200bar; Pressure in the pressure pipeline is lower than 100bar, is preferably 10～40bar.This extinguishing method has solved nozzle operation pressure transient when water spray, reduce the problem that descends with the operating pressure in the gas pressure memory, also can avoid water slug dangerous in the pipe-line system simultaneously, make water guide pipeline and water-filled vessel needn't have high voltage bearing quality.But, just narrated the technical conceive of this fire extinguishing system qualitatively, do not provide clear complete technical solution and specific embodiment, cause and can't judge that it replaces the ability of prior art.
Summary of the invention
The objective of the invention is to overcome the prior art above shortcomings, by this low-pressure water spraying method for extinguishing fire that provides, the constant pressure value that longer time is arranged when not only can be implemented in injection stream, and total system all needn't adopt the high pressure material to make except that air container, and under lower operating pressure, can also obtain little water spray particulate to 10 μ m.
This low-pressure water spraying method for extinguishing fire that the present invention provides, the pressed gas that employing fills in air container is the power source of water spray jet, mainly include air container, tank, connecting pipe, parts such as control valve and low-pressure nozzle, compared with prior art, its difference is that the place, gas outlet of air container is provided with high-pressure pressure-reducing valve, and be connected with tank with nozzle respectively by connecting pipe, on air container and nozzle and connecting pipe that tank is connected, be respectively arranged with the secondary pressure-reducing valve, after high-pressure pressure-reducing valve and secondary pressure-reducing valve are all opened, water in the tank is under the pressed gas effect, through outlet conduit, filter, conducting valve flows to nozzle and mixes back ejection mutually with pressed gas in the nozzle, wherein the gases at high pressure that fill in the air container are at the gas pressure that enters nozzle behind high-pressure pressure-reducing valve and secondary pressure-reducing valve, should be more than or equal to gases at high pressure at the gas pressure that behind high-pressure pressure-reducing valve and secondary pressure-reducing valve, enters tank, the pressed gas type of drive is adopted in the outflow of water in the present invention, certainly also can adopt other pressure-driven mode, even comprise that also the negative-pressure siphon effect of adopting the pressed gas jet to produce causes the outflow of water or the mode of employing flow by gravity.
Be to improve extinguishing ability, the gases at high pressure in air container of filling as this system dynamic source are inert gas or other not combustion-supporting gas, for example one or more the mixed gases in the gases such as nitrogen, carbon dioxide, argon gas.
For realizing goal of the invention better, according to the principle of water spray extinguishing: water absorbs in a large number behind the energy rapidly that vaporization causes volumetric expansion, also oxygen is drained except that reducing fire scene temperature, thereby reaches the purpose of fire extinguishing.And water is relevant with the size of drop diameter to the absorbability of energy, in existing water spray fire extinguish system, usually under up to 80～200bar system pressure, can obtain, if it is very difficult to seek out the littler spraying of spraying drop diameter greater than 70 μ m water sprays.The present invention adopts the method for binary fluid spraying and gas atomizing nozzle with matching, this gas atomizing nozzle is open in my utility model patent 01250448.2 in first to file, operating pressure in air container is 12～15MPa, the gas pressure behind high-pressure pressure-reducing valve is 0.6～1.6MPa, the gas pressure (jet pressure) that enters nozzle again behind the secondary pressure-reducing valve is 0.7～4bar, the diameter minimum of the spraying water droplet that penetrates by nozzle reached 10 μ m.
With existing water spray fire extinguish system ratio, water and inert gas that the present invention adopts all are extinguishing chemicals, inert gas is again the energy source of water spray jet simultaneously, therefore system pressure is lower, the spraying water droplet is more small, atomizing effect that is obtained and fire extinguishing better effects if, whole fire extinguishing system (except that air container) all can adopt the low pressure material to make, reduced construction costs, use, installation and maintenance is all very convenient, the operating pressure of nozzle can keep constant for a long time in fire extinguishing procedure, helps improving extinguishing ability.
The specific embodiment
In the embodiment that the present invention provides, air container adopts the high-pressure nitrogen bottle of a volume 40L, operating pressure is 15MPa, utilize high pressure nitrogen as power source, tank is the normal pressure water storage bottle of a volume 80L, nozzle is selected low pressure binary fluid spray nozzle (this nozzle is open in No. 01250448.2, the utility model patent of first to file at me) for use, the exit of high-pressure nitrogen bottle is provided with high-pressure pressure-reducing valve, remain between 0.6～1.6MPa through the nitrogen pressure behind the high-pressure pressure-reducing valve, high-pressure nitrogen bottle links with nozzle and water storage bottle respectively by connecting pipe, on connecting pipe separately, be respectively equipped with the secondary pressure-reducing valve, can be with gas, the pressure of liquid fluid is controlled at selected scope, the water that fills in the water storage bottle is under the driving of low-pressure nitrogen, through flow nozzle behind filter and the conducting valve, mix with the pressed gas of nozzle interior and spray, and adopt position phase Doppler light scattering apparatus to measure the diameter of water spray particulate, meet the standard of ASTM (ASTM).Experimental result is as shown in the table:
| Flow through gas pressure (nozzle) behind the secondary pressure-reducing valve | Flow through gas pressure (water storage bottle) behind the secondary pressure-reducing valve | Discharge L/min | Gas consumption L/min | The spray particles average diameter | |
| Experiment 1 | 1.3bar ±5％ | 1bar ±5％ | 5.3 | 440 | 60～70μm |
| Experiment 2 | 2bar ±5％ | 2bar ±5％ | 1.3 | 150 | 15～50μm |
| Experiment 3 | 3bar ±5％ | 3bar ±5％ | 1.9 | 200 | 15～50μm |
Claims (3)
1. low-pressure water spraying method for extinguishing fire, the pressed gas that employing fills in air container is the power source of water spray jet, mainly include air container, tank, connecting pipe, control valve and low-pressure nozzle, the place, gas outlet that it is characterized in that air container is provided with high-pressure pressure-reducing valve, and be connected with tank with nozzle respectively by connecting pipe, on air container and nozzle and connecting pipe that tank is connected, be respectively arranged with the second depressurized valve, after high-pressure pressure-reducing valve and second depressurized valve are all opened, water in the tank is under the pressed gas effect, through outlet conduit, filter, conducting valve flows to nozzle and mixes back ejection mutually with pressed gas in the nozzle, wherein the gases at high pressure that fill in the air container should be more than or equal to gases at high pressure at the gas pressure that enters tank behind high-pressure pressure-reducing valve and secondary pressure-reducing valve at the gas pressure that enters nozzle behind high-pressure pressure-reducing valve and secondary pressure-reducing valve.
2. water spray extinguishing method according to claim 1 is characterized in that the gases at high pressure in air container of filling as this system dynamic source, is inert gas or other not combustion-supporting gas.
3. water spray extinguishing method according to claim 1 and 2, the operating pressure that it is characterized in that air container is 12～15MPa, the gas pressure behind high-pressure pressure-reducing valve is 0.6～1.6MPa, the gas pressure that enters nozzle again behind the second depressurized valve is 0.7～4bar, the diameter minimum of the spraying water droplet that penetrates by nozzle reach 10 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021423318A CN1308048C (en) | 2001-12-17 | 2002-09-12 | Low-pressure water spray fire extinguishing method |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN011388390 | 2001-12-17 | ||
| CN01138839 | 2001-12-17 | ||
| CN01138839.0 | 2001-12-17 | ||
| CNB021423318A CN1308048C (en) | 2001-12-17 | 2002-09-12 | Low-pressure water spray fire extinguishing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1426820A CN1426820A (en) | 2003-07-02 |
| CN1308048C true CN1308048C (en) | 2007-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021423318A Expired - Fee Related CN1308048C (en) | 2001-12-17 | 2002-09-12 | Low-pressure water spray fire extinguishing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1308048C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009041935A1 (en) * | 2007-09-24 | 2009-04-02 | Utc Fire & Security Corporation | Hybrid inert gas fire suppression system |
| WO2009126155A1 (en) * | 2008-04-10 | 2009-10-15 | Utc Fire & Security Corporation | Fire suppression system with improved two-phase flow distribution |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2098300U (en) * | 1991-07-25 | 1992-03-11 | 曾祥德 | Gas-water spraying fire extinguishing device |
| CN1190028A (en) * | 1997-09-19 | 1998-08-12 | 张卫社 | Automatic water-spraying fire extinguisher |
-
2002
- 2002-09-12 CN CNB021423318A patent/CN1308048C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2098300U (en) * | 1991-07-25 | 1992-03-11 | 曾祥德 | Gas-water spraying fire extinguishing device |
| CN1190028A (en) * | 1997-09-19 | 1998-08-12 | 张卫社 | Automatic water-spraying fire extinguisher |
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| Publication number | Publication date |
|---|---|
| CN1426820A (en) | 2003-07-02 |
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