EP3740290B1 - Schallgedämpfter kopf für feuerlöschgasentladung - Google Patents
Schallgedämpfter kopf für feuerlöschgasentladung Download PDFInfo
- Publication number
- EP3740290B1 EP3740290B1 EP19701326.1A EP19701326A EP3740290B1 EP 3740290 B1 EP3740290 B1 EP 3740290B1 EP 19701326 A EP19701326 A EP 19701326A EP 3740290 B1 EP3740290 B1 EP 3740290B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- silenced
- head
- webs
- wall
- base
- 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.)
- Active
Links
- 239000011148 porous material Substances 0.000 claims description 13
- 238000003754 machining Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 29
- 238000007599 discharging Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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
- A62C99/0018—Methods of extinguishing or preventing the spread of fire by cooling down or suffocating the flames using gases or vapours that do not support combustion, e.g. steam, carbon dioxide
-
- 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
- B05B1/002—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to reduce the generation or the transmission of noise or to produce a particular sound; associated with noise monitoring means
-
- 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
- B05B1/005—Nozzles or other outlets specially adapted for discharging one or more gases
Definitions
- the invention is directed to the field of gas discharge, more particularly to the discharge of fire extinguishing gases. Even more specifically, the invention is directed to gas discharge nozzles and heads thereof.
- Prior art patent document published EP 1 151 800 A2 discloses a silenced nozzle head for discharging fire extinguishing gases.
- the nozzle head comprises a body forming a cylindrical cavity housing filter elements made of porous material, and a perforated disk closing the cavity.
- the filter elements are made of sintered material and are two superimposed thick disks housed in the cavity.
- the body comprises a cylindrical wall that can be provided with apertures forming lateral or radial discharge passages.
- the massive construction of the filter element occupying most of the cavity generate a counter-pressure and a pressure drop for the gas being discharged there through.
- Prior art patent document published EP 2 818 207 A discloses also a silenced nozzle head for discharging fire extinguishing gases.
- the nozzle head comprises a base with an opening forming a gas input, a closed wall made of porous material and extending longitudinally from the base so as to form a distal opening, a front wall made of porous material closing the distal opening of the closed wall, and a fastening ring arranged against an outer face of the front wall and attached to the base by longitudinal screws.
- the cavity housed a filter element made of porous material causing a counter-pressure and a pressure drop for the gas being discharged there through.
- the closed wall shows an increased thickness at the location of the screws which extend through the wall. This renders the manufacturing of the wall more complex and expensive.
- Other prior art documents are US 2014/069663 A1 and JP 2017 104560 A .
- the invention has for technical problem to provide a head for a gas discharge, in particular for a fire extinguishing gas discharge, that causes a reduced pressure while reducing the noise generated when discharging the gas.
- the invention is directed to a silenced head for a gas discharge, in particular for a fire extinguishing gas discharge, comprising: a base with an opening forming a gas input; a closed wall made of porous material and extending longitudinally from the base so as to form a distal opening; a front wall made of porous material closing the distal opening of the closed wall; a fastening ring arranged against an outer face of the front wall and attached to the base by longitudinal screws; wherein the ring comprises a ring portion and webs extending radially from the ring portion so as to form contact surfaces for the front wall.
- the webs extend radially to the centre of the ring portion.
- the webs are three or more.
- the webs form with the ring portion apertures with a total cross-sectional area that is larger than 50%, preferably larger than 60%, of the area of the outer face of the front wall.
- the webs are integrally formed with the ring portion.
- the webs and apertures are formed by machining.
- the ring has an outer diameter and the webs have a minimum width that is larger than 5% and/or less than 10% of said outer diameter.
- the closed wall shows an inner side delimiting a cavity of the silenced head, the screws being located in the cavity.
- the screws are located radially distant from the closed wall.
- the closed wall is cylindrical with a constant wall thickness.
- the base is a circular plate with an outer edge forming a shoulder housing the closed wall.
- the base comprises threaded nuts formed in or attached to the circular plate at locations radially between the opening and the shoulder.
- the ring portion of the ring has an outer edge forming a shoulder housing the front wall and the closed wall.
- the screws are located on the ring at a junction between the ring portion and the webs.
- the opening of the base is configured for receiving a gas discharge nozzle.
- the silenced head further comprises the gas discharge nozzle, said nozzle comprising a first series of discharge holes oriented radially and a second series of discharge holes oriented obliquely with regard to a radial plane and the longitudinal axis.
- the porous material of the closed wall and/or of the front wall is a metallic sintered material.
- the invention is particularly interesting in that it provides a gas discharge nozzle assembly that generates a limited counter-pressure and pressure drop while remaining silent, essentially by maximizing the surface of porous material and thereby limiting the flow speed of the gas.
- Figure 1 is a perspective view of a silenced head for a gas discharge, in particular for a fire extinguishing gas discharge, according to the invention.
- the silenced head 2 comprises a base 4 with a generally circular plate (not visible in figure 1 ), a gas inlet at the centre of the circular plate (at the bottom in figure 1 ), and an outer edge 4.1 forming a shoulder.
- a gas discharge nozzle 14 is mounted on the opening at the centre of the base 4.
- the silenced head 2 comprises also a circular wall 6 extending along the longitudinal axis 7 of the head 2, with a proximate edge 6.1 housed in the shouldered edge 4.1 of the base 4.
- the circular wall is preferably circular so as to form a cylinder. It is made of porous material, e.g. sintered metal, in order to act as a filter for diffusing the gas while reducing the amount of noise generated by the gas discharge.
- the silenced head 2 comprises also a front wall 8 arranged in contact with the proximal edge 6.2 of the closed wall 6, in order to close the opening formed by said wall.
- the front wall 8, similarly to the closed wall 6, is made of porous material, e.g. sintered metal, in order to act as a filter for diffusing the gas while reducing the amount of noise generated by the gas discharge.
- the silenced head 2 comprises also a ring 10 arranged on an outer face of the front wall 8. More specifically, the ring 10 comprises a ring portion 10.1 that can form a shoulder for receiving the front wall 8 and the distal edge 6.2 of the closed wall 6.
- the ring 10 comprises also webs 10.2 that extend in a radial plane, inwardly, from the ring portion 10.1. These webs 10.2 form support and contact surfaces for the front wall 8.
- the silenced head 2 comprises also screw 12 that extend essentially longitudinally through the ring 10 and the cavity formed by the closed wall until the base 4.
- Figure 2 is an exploded view of the silenced head 2 of figure 1 .
- the base 4 and the nozzle 14 are better visible than in figure 1 .
- front wall 8 comprises an outer edge 8.1 contacting the distal edge 6.2 of the closed wall 6.
- the front wall 8 comprises also openings 8.2 through which the screws 14 extend.
- Figure 3 is a top view of the silenced head 2.
- the shape of the ring portion 10.1 and webs 10.2 of the ring 10. Each of the, for instance, three webs 10.2 extends essentially radially inwardly until the centre that corresponds to the longitudinal axis 7.
- the webs 10.2 and the ring portion 10.1 form then, for instance, three apertures 10.3 with a total cross-section area that is advantageously larger than 50%, preferably 60%, of the front wall 8 ( figures 1 and 2 ) contacting the webs 10.2.
- the ring 10 is advantageously made of a single piece where the apertures 10.3 can be formed by machining. Other techniques can however also be considered.
- the hole in the ring 10, through which the screws 12 extend are located at junctions between the ring portion 10.1 and the webs 10.2.
- the width of the webs 10.2 is advantageously less than 10% of the outer diameter d of the ring and/or more than 5% of said diameter d.
- Figure 4 is a cross-section view of the silenced head 2 according to the arrows in figure 3 .
- the nozzle 14 comprises a first series of discharge holes 14.1 oriented essentially radially at a mid-height of the cavity formed by the base 4 and the walls 6 and 8. It comprises also a second series of discharge holes 14.2 oriented obliquely with regard to the longitudinal axis 7 and also a radial plane.
- the holes of the second series 14.2 can be oriented with an angle ⁇ with the longitudinal axis 7 that is more than 30° and/or less than 60°, more preferably more than 40° and/or less than 50°.
- the gas being discharge can then be diffused both by the closed wall 6 and by the front wall 8 through the apertures 10.3. This means that the inner surfaces of the cavity able to diffuse the gas is maximized, leading to a reduced counter-pressure and pressure drop, while keeping the gas flow speed reduced and thereby the reducing the noise level.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
Claims (15)
- Schallgedämpfter Kopf (2) für eine Gasentladungsleitung und insbesondere für eine Feuerlösch-Gasentladungsleitung, der Folgendes umfasst:- einen Sockel (4) mit einer Öffnung (4.3, 14), die einen Gaseinlass bildet;- eine geschlossene Wand (6) aus porösem Material, die sich vom Sockel aus in Längsrichtung erstreckt, um eine distale Öffnung zu bilden;- eine Vorderwand (8) aus porösem Material, die die distale Öffnung der geschlossenen Wand (6) verschließt;- einen Befestigungsring (10), der an der Außenfläche der Vorderwand (8) angebracht und mit Längsschrauben (12) am Sockel (4) befestigt ist;dadurch gekennzeichnet, dass
der Befestigungsring (10) einen Ringabschnitt (10.1) und Rippen (10.2) aufweist, die sich radial vom Ringabschnitt (10.1) erstrecken, um Kontaktflächen für die Vorderwand (8) zu bilden. - Schallgedämpfter Kopf (2) gemäß Anspruch 1, wobei sich die Rippen (10.2) radial bis zur Mitte des Ringabschnitts (10.1) erstrecken.
- Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 und 2,
wobei es sich um mindestens drei Rippen (10.2) handelt. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 3,
wobei die Rippen (10.2) mit dem Ringabschnitt (10.1) Öffnungen (10.3) mit einer Gesamtquerschnittsfläche bilden, die größer als 50 % und vorzugsweise größer als 60 % der Fläche der Außenseite der Vorderwand (8) sind. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 4,
wobei die Rippen (10.2) in den Ringabschnitt (10.1) integriert sind. - Schallgedämpfter Kopf (2) gemäß den Ansprüchen 4 und 5,
wobei die Rippen (10.2) und Öffnungen (10.3) maschinell geformt werden. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 6,
wobei der Befestigungsring (10) einen Außendurchmesser (d) aufweist, und wobei die Rippen (10.2) eine Mindestbreite (w) aufweisen, die mehr als 5 % und/oder weniger als 10 % des Außendurchmessers (d) beträgt. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 7,
wobei die geschlossene Wand (6) eine Innenseite aufweist, die den Hohlraum des schallgedämpften Kopfs begrenzt, und wobei sich die Schrauben (12) im Hohlraum befinden. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 8,
wobei die Schrauben (12) einen strahlenförmigen Abstand zur geschlossenen Wand (6) aufweisen. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 9,
wobei die geschlossene Wand (6) zylindrisch ist und eine konstante Wandstärke aufweist. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 10,wobei es sich beim Sockel (4) um eine kreisförmige Platte (4.2) handelt, deren äußerer Rand (4.1) ein flankierendes Gehäuse bildet, das die geschlossene Wand (6) aufnimmt,wobei der Sockel (4) vorzugsweise Gewindemuttern (4.4) umfasst, die an strahlenförmig verteilten Stellen der Öffnung (4.3, 14) und dem flankierenden Gehäuse (4.1) auf der kreisförmigen Platte (4.2) ausgebildet oder befestigt sind.
- Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 11,
wobei der Ringabschnitt (10.1) des Befestigungsrings (10) einen Außenrand aufweist, der ein flankierendes Gehäuse bildet, das die Vorderwand (8) und die geschlossene Wand (6) aufnimmt. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 12,
wobei sich die Schrauben (12) am Befestigungsring (10) an den Verbindungsstellen zwischen dem Ringabschnitt (10.1) und den Rippen (10.2) befinden. - Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 13,wobei die Öffnung (4.3) des Sockels (4) eine Gasentladungsdüse (14) aufnehmen kann,wobei der schallgedämpfte Kopf vorzugsweise zudem die Gasentladungsdüse (14) umfasst,wobei die Düse eine erste Reihe von strahlenförmig angeordneten Entladungsbohrungen (14.1) sowie eine zweite Reihe von in Bezug auf die strahlenförmige Ebene und die Längsachse (7) schräg ausgerichteten Entladungsbohrungen (14.2) umfasst.
- Schallgedämpfter Kopf (2) gemäß einem der Ansprüche 1 bis 14, wobei es sich beim porösen Material der geschlossenen Wand (6) und/oder der Vorderwand (8) um ein Sintermetall handelt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU100679A LU100679B1 (en) | 2018-01-21 | 2018-01-21 | Silenced head for fire extinguishing gas discharge |
PCT/EP2019/051273 WO2019141819A1 (en) | 2018-01-21 | 2019-01-18 | Silenced head for fire extinguishing gas discharge |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3740290A1 EP3740290A1 (de) | 2020-11-25 |
EP3740290B1 true EP3740290B1 (de) | 2021-10-20 |
Family
ID=61627142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19701326.1A Active EP3740290B1 (de) | 2018-01-21 | 2019-01-18 | Schallgedämpfter kopf für feuerlöschgasentladung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3740290B1 (de) |
LU (1) | LU100679B1 (de) |
WO (1) | WO2019141819A1 (de) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1317475B1 (it) | 2000-05-05 | 2003-07-09 | Vesta S R L | Ugello silenziato per la scarica di gas estinguenti. |
JP4988945B2 (ja) * | 2009-10-23 | 2012-08-01 | エア・ウォーター防災株式会社 | ガス消火設備 |
TWI566804B (zh) | 2012-02-21 | 2017-01-21 | 高壓股份有限公司 | 氣體系滅火設備用的具有消音功能的噴射頭 |
RU2717772C1 (ru) * | 2016-06-13 | 2020-03-25 | Коацу Ко., Лтд. | Огнетушитель |
-
2018
- 2018-01-21 LU LU100679A patent/LU100679B1/en active IP Right Grant
-
2019
- 2019-01-18 EP EP19701326.1A patent/EP3740290B1/de active Active
- 2019-01-18 WO PCT/EP2019/051273 patent/WO2019141819A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
WO2019141819A1 (en) | 2019-07-25 |
LU100679B1 (en) | 2019-07-22 |
EP3740290A1 (de) | 2020-11-25 |
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