EP3177368A1 - Open nozzles for firefighting systems - Google Patents

Open nozzles for firefighting systems

Info

Publication number
EP3177368A1
EP3177368A1 EP15770969.2A EP15770969A EP3177368A1 EP 3177368 A1 EP3177368 A1 EP 3177368A1 EP 15770969 A EP15770969 A EP 15770969A EP 3177368 A1 EP3177368 A1 EP 3177368A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
water
nozzle body
wings
systems
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Withdrawn
Application number
EP15770969.2A
Other languages
German (de)
French (fr)
Inventor
Ferruccio CERRUTI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Etea Sicurezza Group Ltd
Original Assignee
Etea Sicurezza Group Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Etea Sicurezza Group Ltd filed Critical Etea Sicurezza Group Ltd
Publication of EP3177368A1 publication Critical patent/EP3177368A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
    • B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
    • B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
    • B05B1/3415—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with swirl imparting inserts upstream of the swirl chamber

Definitions

  • the present invention relates to a nozzle, of the type called "open", for fire extinguishing systems employing water mist at low pressure.
  • low pressure is intended a pressure not greater than 12.5 bar.
  • water mist is intended a cone jet of water having at least 90% of the droplets at 1 m distance from the nozzle characterized by a diameter smaller than 1 mm.
  • Water mist nozzles for firefighfing systems are known and are called “sprinkler".
  • a jet of water is conveyed into nozzles within which, after hitting a deflector, is divided into a spray of droplets.
  • a problem of "sprinkler" firefighting systems is that the water is distributed in droplet of enough large size and, consequently, the sprinkler systems require large reserves of water.
  • Another disadvantage of such systems is that the deflector makes the nozzle sensitive to physical shock and possible tampering by spiteful person.
  • An alternative solution is represented by systems having nebulized water at high pressure, which operate with water input pressures greater than 35 bar and typically between 00 and 120 bar.
  • nozzles have small orifices, to create droplets of suitable size.
  • the small holes of the nozzle make it very sensitive to dogging by impurities, which are present in water and pipes. Therefore, it is necessary to make sure that components of the supply system are internally free of solid particles and ensure that the used materials have a high corrosion resistance, since said corrosion could generate solid particles that can dog the nozzle orifices.
  • the small size of the drops generated by high pressure systems and, accordingly, the small mass that characterizes them make this technology unsuitable to extinguish fires at high power thermal emissions, in fact, the droplets tend to be easily taken away from flames by air upward movements around the fire. Thus the droplets cannot reach and cool the fuel.
  • Aim of the present invention is to realize a so called “open” nozzle for firefighting low pressure water mist systems, which is free from the above described drawbacks.
  • the nozzle is characterized in that it comprises an effective "swirl” generator device. Swirl means those vortex and rotational motions that allow the water jet to increase the available kinetic energy, making effective the atomization of the jet in small size droplets.
  • an open nozzle is described, the nozzle being suitable for low pressure firefighting systems and having the features as defined in the enclosed independent claim.
  • FIG. 1 is a cross section of a nozzle according to a preferred embodiment of the present invention.
  • Figure 2 is a detail of the nozzle body of Fig. 1 ;
  • Figure 3 is a front view of the guiding insert of the nozzle of Fig. 1 ;
  • Figure 4 is a top view of the guiding insert of Fig. 3;
  • FIG. 5 is a side view of the guiding insert of Fig. 3.
  • a nozzle for firefighting low-pressure water mist systems is indicated as a whole by 10.
  • the nozzle is able to create a full cone water mist with opening angle between
  • the nozzle can be used for fire protection of confined (e.g., tunnels) and open spaces, in maritime and terrestrial applications, for facilities cooling and for individual machines protection.
  • the nozzle 10 comprises a nozzle body 20, made of stainless steel or brass, axisymmetric shaped with respect to an axis X, in fluid communication with the water supply pipes, which are of known type and therefore not shown in the attached drawings.
  • the nozzle comprises an inlet opening 21 , for water supplying, an inner cavity 22 substantially cylindrical shaped with a spherical bottom wall 22' having a radius equal to the overall diameter of the inner cylindrical cavity 22 and an outlet opening 23 with rounded edges 23', for evacuation of the water mist.
  • the rounded radius of the edges is such as to create an angle ranging between 100° and 120° among the external tangents.
  • a groove 24 having a triangular section, with a vertex angle of 90°.
  • Such groove creates a sharp corner 24 'on the outer edge of the outlet opening 23, able to favor breakage of the liquid lamina and, therefore, the formation of small size droplets. In this way the size distribution of the droplets through the cone is more uniform.
  • the nozzle body 20 is provided with coupling means, in the example in the figure a thread 25, to be steadily fixed to the water supply pipe or to a coupling with said pipe.
  • the mounting of a filter consisting of stainless steel mesh can be provided, the filter acting to prevent the impurities passage.
  • the nozzle 10 also comprises a guiding insert 30, which is also made of stainless steel or brass, steadily allocated inside the inner cylindrical cavity 22 , having the function to split the water flow into two streams. Said streams assume a composed rotational (“swirl") and axial motion within the cavity 22 before to leak out from the nozzle through the outlet opening 23.
  • the insert 30 is locked inside the hollow body by means of an interference with the inner surfaces of the body, which prevents the rotation.
  • the insert is realized by means of mechanical working or by a sintering process. As known, one of the mechanisms for extinguishing fires by means of water mist is the temperature reduction.
  • the extent of the removed heat depends, obviously, by the volume of water and the diameter of the water droplets: with same amount of water, smaller droplets are able to extract more heat, thanks to the effect of a more favorable surface/volume ratio.
  • the droplets of water mist in order to penetrate into the flames, must possess speed and mass such as to overcome the turbulence of the combustion gases emitted by the flames.
  • the main nozzle design target according to the present invention is to minimize the operating pressure and the needed water flow-rate, obtaining at the same time a sufficient amount of water droplets with adequate speed and mass.
  • the small water droplets can be generated from a suitable atomization, which can be defined as liquid breaking into a light mist that is hanging in the air.
  • the atomization is obtained by forming within it an appropriate rotational motion of the liquid.
  • the guiding insert 30 is designed to create a full cone atomized jet, providing the flowing through water with a turbulent and swirling motion.
  • the insert is configured such as to optimize the fluid dynamics of the water flow, reducing losses and, at the same time, limiting the possibility of passages obstruction.
  • the insert comprises a vertical support 31 , with curved surfaces, preferably 1 mm thick and having a width equal to the diameter of the inner cavity 22 of the nozzle body.
  • the insert can be locked to translations and rotations within the nozzle body 20 by interference (for example, by means of press-fit operation) or mechanically in any other way.
  • the insert 30 also includes two inclined wings 32, having an inclination comprised between 35° and 60° with respect to the vertical axis X of the nozzle body 20 and preferably equal to 54°.
  • Each wing 32 has a distal portion 33, which extends beyond the surface of the support 31 and, adjacent to the respective distal portions 33, corresponding openings 34 are located, said openings substantially square or rectangular shaped capable to generate an axial flow, which interacts with the swirling motion of the water generated by the wings, allowing as a final result to have a full cone jet.
  • the openings 34 have similar depth and width and, in any case, comprised between 1/7 and 1/5 of the diameter of the guiding insert. Said dimensions guarantee the presence of two passages 35 through which two liquid veins having a purely axial flow are generated. Such configuration allows to reduce the probability of nozzle clogging, preserving its fluid-dynamic efficiency.
  • the inner surfaces 36 of the openings 34 are parallel to the wings surfaces 32 and are coplanar with the wing lower surfaces 37. Finally, each of the end surfaces 38 of the wings 32 is coplanar with the surface 39 of the vertical support 31 to which each wing 32 is connected.
  • Equipped with this composition of motions (rotational and axial inside the inner cavity 22), the water is then guided through the outlet opening 23 with rounded edges 23' and gives rise to a conical and full jet having half of amplitude, with respect to the axis X, ranging between 40° - 60°.
  • nozzles allow to acquire to the firefighting low-pressure water mist systems both the benefits of firefighting sprinkler systems and high pressure water systems.
  • low pressure systems present components which are normally used in common sprinklers, and, at the same time, ensure fire protection performances and benefits comparable to those of high pressure water mist systems.
  • the present nozzle creates a small dispersion of droplets that quickly evaporating due to the high surface/volume ratio, is able to absorb heat quickly; in addition, the homogeneous atomization generated by the nozzle contains the flame thermal radiance and contributes to fire chocking, by means of a partial process of replacement of oxygen with water in the area surrounding the fire.
  • said nozzles 10 are made of steel AISI 303 or AISI 316 or brass, work at operating pressures typically between 3.5 and 6 bar and ensure, against fire, the same performances of traditional sprinkler systems, using a water flow from 30 to 50% lower. This means the possibility of allocating to fire systems a lower reserve of water and, in case of fire, to limit damages to objects and structures reached by the water.
  • the nozzle according to the invention with the corresponding low pressure water mist system is indicated, and however not limited, for the protection of industrial and civil, warehouses, conveyor belts, machinery and small paper archives.

Abstract

An open nozzle (10) for firefighting low-pressure water mist systems, presents a nozzle body (20) in fluid communication with water supply pipes, the nozzle body having an inlet opening (21), for water supplying, an inner cavity (22), substantially cylindrical shaped, and an outlet opening (23) for evacuation of the water mist. Moreover, the nozzle (10) is provided with a guiding insert (30), steadily fixed inside the nozzle body (20), having a vertical support (31) and two inclined wings (32), each wing (32) presenting a distal portion (33), which extends beyond the surface of the support (31) and, adjacent to the respective distal portion (33), corresponding openings (34), with a substantially square or rectangular section and dimensions ranging between 1/7 and 1/5 of the guiding insert overall diameter.

Description

OPEN NOZZLES FOR F!REF!GHTING SYSTEMS
DESCRIPTION
Technical field of the invention
The present invention relates to a nozzle, of the type called "open", for fire extinguishing systems employing water mist at low pressure. With the term low pressure is intended a pressure not greater than 12.5 bar. With water mist is intended a cone jet of water having at least 90% of the droplets at 1 m distance from the nozzle characterized by a diameter smaller than 1 mm.
Background Art
Water mist nozzles for firefighfing systems are known and are called "sprinkler". In such systems, a jet of water is conveyed into nozzles within which, after hitting a deflector, is divided into a spray of droplets. A problem of "sprinkler" firefighting systems is that the water is distributed in droplet of enough large size and, consequently, the sprinkler systems require large reserves of water. Another disadvantage of such systems is that the deflector makes the nozzle sensitive to physical shock and possible tampering by spiteful person.
An alternative solution is represented by systems having nebulized water at high pressure, which operate with water input pressures greater than 35 bar and typically between 00 and 120 bar.
This solution implies a series of drawbacks the main of which is linked to complexity and cost of the system; in fact, pumps and components of the water supply system must be designed and produced with materials suitable to operate at high pressures.
l Another problem of high pressure spray systems is that the nozzles have small orifices, to create droplets of suitable size. The small holes of the nozzle make it very sensitive to dogging by impurities, which are present in water and pipes. Therefore, it is necessary to make sure that components of the supply system are internally free of solid particles and ensure that the used materials have a high corrosion resistance, since said corrosion could generate solid particles that can dog the nozzle orifices. Finally, the small size of the drops generated by high pressure systems and, accordingly, the small mass that characterizes them, make this technology unsuitable to extinguish fires at high power thermal emissions, in fact, the droplets tend to be easily taken away from flames by air upward movements around the fire. Thus the droplets cannot reach and cool the fuel.
The above problem has been solved by introducing firefighting systems having low pressure water mist. These systems can work with simpler components from materials and costs point of view: in practice, same components of sprinkler systems can be adopted. However, in these systems, the water fed at low pressure is provided with low kinetic energy: for this reason, it is not possible to get a water jet sufficiently atomized, which, at the same time, completely fills the exit cone of the nozzle.
Summary of the invention
Aim of the present invention is to realize a so called "open" nozzle for firefighting low pressure water mist systems, which is free from the above described drawbacks. Specifically, the nozzle is characterized in that it comprises an effective "swirl" generator device. Swirl means those vortex and rotational motions that allow the water jet to increase the available kinetic energy, making effective the atomization of the jet in small size droplets. According to the present invention an open nozzle is described, the nozzle being suitable for low pressure firefighting systems and having the features as defined in the enclosed independent claim.
Further embodiments of the invention, preferred and/or particularly advantageous, are described according to the characteristics as in the enclosed dependent claims.
Brief Description of Drawings
The invention will be now described by reference to the enclosed drawings, which show some non-limitative embodiments, namely:
- Figure 1 is a cross section of a nozzle according to a preferred embodiment of the present invention;
Figure 2 is a detail of the nozzle body of Fig. 1 ;
Figure 3 is a front view of the guiding insert of the nozzle of Fig. 1 ;
Figure 4 is a top view of the guiding insert of Fig. 3;
- Figure 5 is a side view of the guiding insert of Fig. 3.
Detailed Description
Referring now to the figures, a nozzle for firefighting low-pressure water mist systems, according to a preferred embodiment of the invention, is indicated as a whole by 10.
The nozzle is able to create a full cone water mist with opening angle between
80° and 120° and it is used for control/suppression/firefighting of fires belonging to risk class LH, OH and HHS according to the UNI EN 12845: 2009 regulation. The nozzle can be used for fire protection of confined (e.g., tunnels) and open spaces, in maritime and terrestrial applications, for facilities cooling and for individual machines protection. The nozzle 10 comprises a nozzle body 20, made of stainless steel or brass, axisymmetric shaped with respect to an axis X, in fluid communication with the water supply pipes, which are of known type and therefore not shown in the attached drawings. The nozzle comprises an inlet opening 21 , for water supplying, an inner cavity 22 substantially cylindrical shaped with a spherical bottom wall 22' having a radius equal to the overall diameter of the inner cylindrical cavity 22 and an outlet opening 23 with rounded edges 23', for evacuation of the water mist. The rounded radius of the edges is such as to create an angle ranging between 100° and 120° among the external tangents.
Moreover, on the outer edge of the outlet opening 23 there is a groove 24 having a triangular section, with a vertex angle of 90°. Such groove creates a sharp corner 24 'on the outer edge of the outlet opening 23, able to favor breakage of the liquid lamina and, therefore, the formation of small size droplets. In this way the size distribution of the droplets through the cone is more uniform.
The nozzle body 20 is provided with coupling means, in the example in the figure a thread 25, to be steadily fixed to the water supply pipe or to a coupling with said pipe.
In correspondence of the inlet opening of the nozzle the mounting of a filter consisting of stainless steel mesh can be provided, the filter acting to prevent the impurities passage.
The nozzle 10 also comprises a guiding insert 30, which is also made of stainless steel or brass, steadily allocated inside the inner cylindrical cavity 22 , having the function to split the water flow into two streams. Said streams assume a composed rotational ("swirl") and axial motion within the cavity 22 before to leak out from the nozzle through the outlet opening 23. The insert 30 is locked inside the hollow body by means of an interference with the inner surfaces of the body, which prevents the rotation. The insert is realized by means of mechanical working or by a sintering process. As known, one of the mechanisms for extinguishing fires by means of water mist is the temperature reduction. The extent of the removed heat depends, obviously, by the volume of water and the diameter of the water droplets: with same amount of water, smaller droplets are able to extract more heat, thanks to the effect of a more favorable surface/volume ratio. In addition, in order to penetrate into the flames, the droplets of water mist must possess speed and mass such as to overcome the turbulence of the combustion gases emitted by the flames.
The main nozzle design target according to the present invention is to minimize the operating pressure and the needed water flow-rate, obtaining at the same time a sufficient amount of water droplets with adequate speed and mass. The small water droplets can be generated from a suitable atomization, which can be defined as liquid breaking into a light mist that is hanging in the air.
In the present nozzle, the atomization is obtained by forming within it an appropriate rotational motion of the liquid. For this purpose, the guiding insert 30 is designed to create a full cone atomized jet, providing the flowing through water with a turbulent and swirling motion. The insert is configured such as to optimize the fluid dynamics of the water flow, reducing losses and, at the same time, limiting the possibility of passages obstruction.
The insert comprises a vertical support 31 , with curved surfaces, preferably 1 mm thick and having a width equal to the diameter of the inner cavity 22 of the nozzle body. The insert can be locked to translations and rotations within the nozzle body 20 by interference (for example, by means of press-fit operation) or mechanically in any other way. The insert 30 also includes two inclined wings 32, having an inclination comprised between 35° and 60° with respect to the vertical axis X of the nozzle body 20 and preferably equal to 54°. Each wing 32 has a distal portion 33, which extends beyond the surface of the support 31 and, adjacent to the respective distal portions 33, corresponding openings 34 are located, said openings substantially square or rectangular shaped capable to generate an axial flow, which interacts with the swirling motion of the water generated by the wings, allowing as a final result to have a full cone jet.
The openings 34 have similar depth and width and, in any case, comprised between 1/7 and 1/5 of the diameter of the guiding insert. Said dimensions guarantee the presence of two passages 35 through which two liquid veins having a purely axial flow are generated. Such configuration allows to reduce the probability of nozzle clogging, preserving its fluid-dynamic efficiency.
The inner surfaces 36 of the openings 34 are parallel to the wings surfaces 32 and are coplanar with the wing lower surfaces 37. Finally, each of the end surfaces 38 of the wings 32 is coplanar with the surface 39 of the vertical support 31 to which each wing 32 is connected.
Equipped with this composition of motions (rotational and axial inside the inner cavity 22), the water is then guided through the outlet opening 23 with rounded edges 23' and gives rise to a conical and full jet having half of amplitude, with respect to the axis X, ranging between 40° - 60°.
The use of these nozzles allows to acquire to the firefighting low-pressure water mist systems both the benefits of firefighting sprinkler systems and high pressure water systems. In fact, such low pressure systems present components which are normally used in common sprinklers, and, at the same time, ensure fire protection performances and benefits comparable to those of high pressure water mist systems.
As already mentioned, the present nozzle creates a small dispersion of droplets that quickly evaporating due to the high surface/volume ratio, is able to absorb heat quickly; in addition, the homogeneous atomization generated by the nozzle contains the flame thermal radiance and contributes to fire chocking, by means of a partial process of replacement of oxygen with water in the area surrounding the fire.
Advantageously, said nozzles 10 are made of steel AISI 303 or AISI 316 or brass, work at operating pressures typically between 3.5 and 6 bar and ensure, against fire, the same performances of traditional sprinkler systems, using a water flow from 30 to 50% lower. This means the possibility of allocating to fire systems a lower reserve of water and, in case of fire, to limit damages to objects and structures reached by the water.
The nozzle according to the invention with the corresponding low pressure water mist system (including pump means, water supply means and water shut-off means) is indicated, and however not limited, for the protection of industrial and civil, warehouses, conveyor belts, machinery and small paper archives.
The regulation for water mist systems, UNI CEN TS 14972: 2011 - Water mist systems - Design and installation, is a technical specification. In other words, this European regulatory document clarifies that the use of water mist systems is limited to those applications which have been tested.
In particular, the above described nozzle was used with success for the following fires extinction (in the table below is showed the fire scenery and its hazard class):
Table 1
Other than the embodiments of the invention, as above disclosed, it is to be understood that a vast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples and are not intended to limit the scope, applicability, or configuration in any way. Rather, the foregoing summary and detailed description will provide those skilled in the art with a convenient road map for implementing at least one exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope as set forth in the appended claims and their legal equivalents.

Claims

1. Open nozzle (10) for firefighting low-pressure water mist systems, comprising:
- a nozzle body (20) in fluid communication with water supply pipes, the nozzle body comprising an inlet opening (21), for water supplying, an inner cavity (22), substantially cylindrical shaped, and an outlet opening (23) for evacuation of the water mist,
- a guiding insert (30), steadily fixed inside the nozzle body (20), comprising a vertical support (31) and two inclined wings (32),
and characterized in that each wing (32) presents a distal portion (33), which extends beyond the surface of the support (31) and, adjacent to the respective distal portion (33), corresponding openings (34), with a substantially square or rectangular section and dimensions ranging between 1/7 and 1/5 of the guiding insert overall diameter.
2. Nozzle (10) according to claim 1 , characterized in that said wings (32) have an inclination ranging between 35° and 60° with respect to a vertical axis (X) of the nozzle body (20).
3. Nozzle (10) according to claim 2, characterized in that said inclination is exactly equal to 54°.
4. Nozzle (10) according to any of the preceding claims, characterized in that the inner surfaces (36) of the openings (34) are parallel to the wings (32) surfaces and coplanar to the lower surfaces (37) of the wings (32).
5. Nozzle (10) according to any of the preceding claims, characterized in that the end surfaces (38) of the wings (32) are coplanar to the surfaces (39) of the vertical support (31).
6. Nozzle (10) according to any of the preceding claims, characterized in that the support (31) has a thickness of 1 mm and a width equal to the overall diameter of the inner cavity (22) of the nozzle body (20).
7. Nozzle (10) according to any of the preceding claims, characterized in that an outer edge of the outlet opening (23) is provided with a sharp corner (24').
8. Nozzle (10) according to claim 7, wherein said sharp corner (24') is realized by means of a groove (24), having a triangular section and a vertex angle of 90°.
9. Nozzle (10) according to any of the preceding claims, characterized in that said outlet opening (23) has rounded edges (23'), radiused so as to obtain an angle between the outer tangents ranging from 100° to 120°.
10. Nozzle (10) according to any of the preceding claims, characterized in that said inner cylindrical cavity (22) has a spherical bottom wall (22') having a radius equal to the overall diameter of the inner cylindrical cavity (22).
EP15770969.2A 2014-08-05 2015-07-31 Open nozzles for firefighting systems Withdrawn EP3177368A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20140636 2014-08-05
PCT/IB2015/055813 WO2016020811A1 (en) 2014-08-05 2015-07-31 Open nozzles for firefighting systems

Publications (1)

Publication Number Publication Date
EP3177368A1 true EP3177368A1 (en) 2017-06-14

Family

ID=51753390

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15770969.2A Withdrawn EP3177368A1 (en) 2014-08-05 2015-07-31 Open nozzles for firefighting systems

Country Status (2)

Country Link
EP (1) EP3177368A1 (en)
WO (1) WO2016020811A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5685376A (en) * 1993-10-19 1997-11-11 Tirronen; Hannu System and method utilizing low-pressure nozzles for extinguishing fires

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3072346A (en) * 1961-09-29 1963-01-08 Spraying Systems Co Spray nozzle
US3104829A (en) * 1962-05-17 1963-09-24 Spraying Systems Co Vane unit for spray nozzles
US6076744A (en) * 1998-12-23 2000-06-20 Spraying Systems Co. Full cone spray nozzle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5685376A (en) * 1993-10-19 1997-11-11 Tirronen; Hannu System and method utilizing low-pressure nozzles for extinguishing fires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2016020811A1 *

Also Published As

Publication number Publication date
WO2016020811A1 (en) 2016-02-11

Similar Documents

Publication Publication Date Title
US9004375B2 (en) Method and apparatus for generating a mist
US9010663B2 (en) Method and apparatus for generating a mist
KR101531478B1 (en) Fire protection apparatus, systems and methods for addressing a fire with a mist
US10507480B2 (en) Method and apparatus for generating a mist
US10286240B2 (en) Automatic nozzle for firefighting systems
KR20070042552A (en) Fire fighting nozzle for projecting fog cloud
CN102065954A (en) Extinguishing nozzle body
US10933265B2 (en) Ambient mist sprinkler head
RU84715U1 (en) FIRE FIGHTING PLANT
JP3542806B2 (en) Spray nozzle
WO2016020811A1 (en) Open nozzles for firefighting systems
EP3019246B1 (en) Air induction nozzle
RU2570756C2 (en) Sprinkling nozzle for fire extinguishing units with high pressure fine sprayed liquid
CA2255079A1 (en) Nozzle
AU2018222911B2 (en) Spray nozzle
RU154235U1 (en) FIRE EXTINGUISHER FOAM GENERATOR FOR COMPLETING A MOBILE EDUCATIONAL COMPLEX FOR TEACHING POPULATION IN THE FIELD OF CIVIL DEFENSE AND PROTECTION AGAINST EXTRAORDINARY SITUATIONS
US20230044995A1 (en) Firefighting system for an extractor duct, in particular of a cooking zone
CN113398519A (en) Air-assisted water curtain and water mist composite spraying device
JP2010518953A (en) Spray head, fire extinguishing apparatus and method
TR201717360A2 (en) RADIATOR SYSTEM IN WHICH LIQUID IS ATOMIZED

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20170210

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20200330

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200811