EP1543881A2 - A method and a nozzle for generating a water mist - Google Patents
A method and a nozzle for generating a water mist Download PDFInfo
- Publication number
- EP1543881A2 EP1543881A2 EP04388089A EP04388089A EP1543881A2 EP 1543881 A2 EP1543881 A2 EP 1543881A2 EP 04388089 A EP04388089 A EP 04388089A EP 04388089 A EP04388089 A EP 04388089A EP 1543881 A2 EP1543881 A2 EP 1543881A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- mist
- water
- water jet
- nozzles
- 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.)
- Withdrawn
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/05—Nozzles specially adapted for fire-extinguishing with two or more outlets
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C99/00—Subject matter not provided for in other groups of this subclass
- A62C99/0009—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames
- A62C99/0072—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using sprayed or atomised water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
Definitions
- the invention relates to a method of generating a water mist in particular for fire extinction by means of permanently installed nozzles as well as a nozzle for performing the method.
- valve and nozzle arrangement is known from US 5 590 719, where the nozzle is configured as a pipe having an adjustable outlet nozzle at one end and a needle valve having a centre hole at the other end.
- the adjustable needle valve ensures that the liquid flow through the nozzle pipe may be adjusted, which, together with the position of the outlet nozzle, makes it possible to adjust the water distribution of the nozzle and thereby the ability of the outlet nozzle to split the periphery of the liquid flow into water droplets.
- the liquid mist from the nozzle is distributed hereby, which is expedient in connection with fire fighting by means of hoses having such a nozzle and valve arrangement.
- the object of the invention is to provide a method of permanently installing nozzles for fire fighting, and this is achieved according to the invention by a method wherein a conical water jet is discharged from a nozzle at the same time as a mist is discharged from one or more nozzles in a direction toward the exterior of the water jet to entrain the mist with the water jet.
- the water mist may be extended over relatively long distances, since the drops are relatively large while their velocity is supported by the velocity of the water jet.
- the nozzles are provided in a nozzle holder, a compact and reliable structure is ensured.
- mist nozzles it is expedient, as stated in claim 3, to allow the mist nozzles to discharge mist in a direction toward the periphery of the water jet in order to thereby utilize the ability of the water to carry the mist forwards.
- the nozzle 2 is mounted in a vertically extending wall 1 such that a horizontal water mist may be spread from the nozzle 2.
- Pressurized water 3 is fed to the nozzle 2 in a generally known manner and such that water is conveyed to a centrally positioned water nozzle 4 for spreading a water jet 5, which has a conical shape, as shown.
- mist nozzles 6 are shown in the nozzle 2, positioned at an inclined angle relative to the horizontal plane such that a water mist 7 is spread from the nozzles 6 which has a direction essentially in parallel with outer rim of the water jet 5.
- the mist 7 when contacting the exterior of the water jet 5, the mist 7 will be given a turbulent movement 8 as well as a laminar movement 8a, as indicated by arrows.
- This pattern of movement has the advantage that the small and thereby light drops, which constitute the mist 7, will be "carried” forwards by the water jet 5 and may thereby be advanced over a relatively great distance.
- the example shown includes two mist nozzles 6, but it is within the scope to have e.g. just an overlying mist nozzle 6 or to arrange more than two around the water nozzle 4.
- the nozzle may hereby be dimensioned according to the mist mixture proportion, while ensuring the desired direction and distance.
- This precise spray picture is important particularly in permanently installed mist nozzle systems.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
Description
- The invention relates to a method of generating a water mist in particular for fire extinction by means of permanently installed nozzles as well as a nozzle for performing the method.
- Extinction of fires by means of water droplets, the so-called water mist, is generally known particularly in the form of valves and nozzles which are mounted on fire hoses.
- An example of such a valve and nozzle arrangement is known from US 5 590 719, where the nozzle is configured as a pipe having an adjustable outlet nozzle at one end and a needle valve having a centre hole at the other end.
- The adjustable needle valve ensures that the liquid flow through the nozzle pipe may be adjusted, which, together with the position of the outlet nozzle, makes it possible to adjust the water distribution of the nozzle and thereby the ability of the outlet nozzle to split the periphery of the liquid flow into water droplets.
- The liquid mist from the nozzle is distributed hereby, which is expedient in connection with fire fighting by means of hoses having such a nozzle and valve arrangement.
- This arrangement, however, is not suitable for use in fixed installations where a very precise spray picture is needed.
- The object of the invention is to provide a method of permanently installing nozzles for fire fighting, and this is achieved according to the invention by a method wherein a conical water jet is discharged from a nozzle at the same time as a mist is discharged from one or more nozzles in a direction toward the exterior of the water jet to entrain the mist with the water jet.
- This provides a very precise mist generation in a surprisingly simple manner, which, together with the water jet, is conveyed forwards in the desired direction and with the correct composition of the water mist.
- To this should be added that the water mist may be extended over relatively long distances, since the drops are relatively large while their velocity is supported by the velocity of the water jet.
- Thus, entrainment of the mist will take place, which will ensure in connection with the "breaking" of the air by the water jet that the velocity of the generated mist may be maintained over relatively long distances.
- When, as stated in claim 2, the nozzles are provided in a nozzle holder, a compact and reliable structure is ensured.
- Finally, it is expedient, as stated in claim 3, to allow the mist nozzles to discharge mist in a direction toward the periphery of the water jet in order to thereby utilize the ability of the water to carry the mist forwards.
- An example of a nozzle according to the invention will be described more fully below with reference to the drawing, which shows a permanently mounted nozzle and its spray picture.
- An example of the nozzle according to the invention for performing the method will be described first.
- As shown in the drawing, the nozzle 2 is mounted in a vertically extending
wall 1 such that a horizontal water mist may be spread from the nozzle 2. - Pressurized water 3 is fed to the nozzle 2 in a generally known manner and such that water is conveyed to a centrally positioned water nozzle 4 for spreading a water jet 5, which has a conical shape, as shown.
- Further, two
mist nozzles 6 are shown in the nozzle 2, positioned at an inclined angle relative to the horizontal plane such that awater mist 7 is spread from thenozzles 6 which has a direction essentially in parallel with outer rim of the water jet 5. - Hereby, when contacting the exterior of the water jet 5, the
mist 7 will be given aturbulent movement 8 as well as a laminar movement 8a, as indicated by arrows. - This pattern of movement has the advantage that the small and thereby light drops, which constitute the
mist 7, will be "carried" forwards by the water jet 5 and may thereby be advanced over a relatively great distance. - This is expedient in particular in case of a horizontal spreading of the water mist.
- The example shown includes two
mist nozzles 6, but it is within the scope to have e.g. just anoverlying mist nozzle 6 or to arrange more than two around the water nozzle 4. - The nozzle may hereby be dimensioned according to the mist mixture proportion, while ensuring the desired direction and distance.
- This precise spray picture is important particularly in permanently installed mist nozzle systems.
Claims (3)
- A method of generating a water mist in particular for fire extinction by means of permanently installed nozzles, characterized in that a conical water jet (5) is discharged from a nozzle (4) at the same time as mist (7) is discharged from one or more nozzles (6) in a direction toward the exterior of the water jet (5) to entrain the mist (7) with the water jet (5).
- A nozzle for performing the method according to claim 1, characterized in that the nozzles (4, 6) are provided in a nozzle holder (2), where the water nozzle (4) is surrounded by one or more mist nozzles (6).
- A nozzle according to claim 2, characterized in that the direction of the mist nozzle (6) is essentially in parallel with the exterior direction of the water jet (5).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200301860 | 2003-12-16 | ||
DK200301860 | 2003-12-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1543881A2 true EP1543881A2 (en) | 2005-06-22 |
EP1543881A3 EP1543881A3 (en) | 2008-03-05 |
Family
ID=34485971
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04388089A Withdrawn EP1543881A3 (en) | 2003-12-16 | 2004-12-15 | A method and a nozzle for generating a water mist |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1543881A3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009068558A1 (en) * | 2007-11-29 | 2009-06-04 | Firexpress A/S | A nozzle head for a fire extinguisher |
CN104667466A (en) * | 2013-11-29 | 2015-06-03 | 上海金盾消防安全科技有限公司 | Water mist nozzle with combination of direct-spray atomizing nozzle and cyclone atomizing nozzles |
CN106994219A (en) * | 2017-04-19 | 2017-08-01 | 国网湖南省电力公司 | Mesohigh fine mist spray head and its wind resistance application process with wind resistance |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20015198U1 (en) * | 2000-09-02 | 2000-10-26 | Callies, Oliver, 64342 Seeheim-Jugenheim | Fire fighting equipment |
-
2004
- 2004-12-15 EP EP04388089A patent/EP1543881A3/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20015198U1 (en) * | 2000-09-02 | 2000-10-26 | Callies, Oliver, 64342 Seeheim-Jugenheim | Fire fighting equipment |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009068558A1 (en) * | 2007-11-29 | 2009-06-04 | Firexpress A/S | A nozzle head for a fire extinguisher |
CN104667466A (en) * | 2013-11-29 | 2015-06-03 | 上海金盾消防安全科技有限公司 | Water mist nozzle with combination of direct-spray atomizing nozzle and cyclone atomizing nozzles |
CN106994219A (en) * | 2017-04-19 | 2017-08-01 | 国网湖南省电力公司 | Mesohigh fine mist spray head and its wind resistance application process with wind resistance |
Also Published As
Publication number | Publication date |
---|---|
EP1543881A3 (en) | 2008-03-05 |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: PALLE, CARSTEN |
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18D | Application deemed to be withdrawn |
Effective date: 20080906 |