EP2366436B1 - Fire-extinguishing device for a false wall - Google Patents

Fire-extinguishing device for a false wall Download PDF

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Publication number
EP2366436B1
EP2366436B1 EP20110158495 EP11158495A EP2366436B1 EP 2366436 B1 EP2366436 B1 EP 2366436B1 EP 20110158495 EP20110158495 EP 20110158495 EP 11158495 A EP11158495 A EP 11158495A EP 2366436 B1 EP2366436 B1 EP 2366436B1
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EP
European Patent Office
Prior art keywords
extinguishing device
fire extinguishing
fire
spraying
perforating
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EP20110158495
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German (de)
French (fr)
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EP2366436A1 (en
Inventor
Jean-Marc Scherrer
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Normalu SAS
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Normalu SAS
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • 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
    • A62C31/22—Nozzles specially adapted for fire-extinguishing specially adapted for piercing walls, heaped materials, or the like

Definitions

  • the present invention relates to an automatic fire extinguishing device of dispersion type extinguishing products such as water, for example, said device being intended to be integrated into a false-wall fabric stretched, and in particular a false ceiling .
  • the present invention relates to a false wall comprising such an automatic fire extinguishing device.
  • these fire extinguishing devices comprise dispersing heads and are connected to a network of water pipes or products dissolved in water under pressure and arranged on the ceiling of the premises to be protected. Said devices react automatically when a fire occurs. Thus, in case of fire, the heat released rises and reaches one of the dispersion heads distributed on the ceiling. Under the effect of heat, the bulb or fuse which keeps said closed dispersion head is destroyed (the ampoule contains, in a conventional manner, an alcohol which boils under the effect of heat and which thus breaks the thin wall of the bulb). The permanent pressure in the pipe, to which said fire extinguishing devices are connected, is then released through the dispersion head, thereby watering the inflamed area.
  • these fire extinguishing devices are either fixed and arranged projecting on the ceiling of the premises to be protected, or retractable and arranged partially in said ceiling.
  • False walls including false ceilings, conventionally comprise one or more stringers which are fixed on each of the walls and / or ceiling of a room, and a flexible sheet and generally opaque, which is deformed by tension so that its edges, provided with attachment means, can be fixed to said smooth with the aid of these attachment means, taking care to stretch the sheet well to offer a beautiful aspect.
  • This sheet is thus stretched parallel to a wall of the room so as to leave a residual space between the wall of said room and said sheet.
  • This residual space also called velum, can accommodate all unsightly equipment such as electrical cables, pipes, etc. Therefore, said web allows to hide these equipment but also the imperfections of the walls of the room and to have a uniform and clean visible face including retaining dust in this velum.
  • WO 2007/111897 discloses a fire extinguishing device according to the preamble of claim 1.
  • the object of the present invention is therefore to overcome the above-mentioned drawbacks and to propose a dispersion-type fire extinguishing device for a false stretched-web wall making it possible to maintain the uniformity of the visible face of said sheet and not to not intervene on the network of pipes.
  • this fire extinguishing device which is simple and economical, is visible, only when a fire occurs.
  • this fire extinguishing device is efficient, fast and does not require advantageously to exert significant mechanical forces for its implementation.
  • a fire extinguishing device fire-extinguishing device intended to be integrated at the rear of a false-wall type ceilings in particular and comprising a flexible sheet
  • said fire extinguishing device comprising means for dispersing fire extinguishing agents, at least one base capable of being secured to a fixed support and at least one perforating means capable of forming at least one orifice in the flexible sheet; to allow dispersion of the extinguishing products through said flexible sheet when a fire occurs, the perforating means comprising a body and a perforating element disposed at the free end of said body.
  • Said fire extinguishing device is remarkable in that the perforating element is at least one heating element arranged to melt and / or burn the flexible ply to create at least said orifice.
  • the fire extinguishing device is also partly retractable and automatic.
  • the present invention also relates to a false wall comprising a stretched sheet hung by its edges to a plurality of hanging rails attached to the wall or ceiling of a room, said flexible sheet being tensioned offset from a wall of said room so to leave between it and said wall a remarkable residual space in that it comprises a fire extinguishing device according to the invention.
  • a fire extinguishing device incorporated in a false wall 1 of false ceiling type will be described, however, the fire extinguishing device according to the invention may obviously be used for a fake wall-type fake wall.
  • the figure 1 represents the upper part of a false ceiling 1 comprising a flexible sheet 2 stretched horizontally below the ceiling (not shown) of a room 3.
  • This flexible sheet 2 is fixed along its edges to a smooth 4, said smooth 4 being formed of abutting profiles and fixed to the wall 5 of said room 3, by appropriate fastening means (not shown), such as screws.
  • a residual space 6, also called velum located between the ceiling of said room 3 and said flexible sheet 2.
  • the fire extinguishing device 7 comprises a base 8, a perforation means 9 adapted to move relative to said base 8 preferably in a direction substantially perpendicular to the inner face of the flexible sheet 2 and a means of dispersion 10 of fire extinguishing products.
  • inner face refers to the face of the flexible ply 2 located on the side of the residual space 6 and therefore "outer face” the face of the flexible ply 2 located on the side of the room 3.
  • the dispersed extinguishing products are preferably products acting by cooling such as water used alone or with additives capable of forming an insulating film.
  • products acting by cooling such as water used alone or with additives capable of forming an insulating film.
  • the base 8 is able to be secured to a fixed support and, preferably, it is integral with the ceiling of the room 3 and has a tubular shape of generally circular section oriented so that its longitudinal axis is substantially perpendicular to the face inside the flexible tablecloth 2.
  • the perforation means 9 comprises a body 91 advantageously of tubular shape of generally circular cross-section allowing the sliding of said perforating means 9 inside said base 8.
  • the perforating means 9 comprises, at its free end of the body 91 located on the side of the inner face of the flexible sheet 2, a perforating element 92, the free end of the body 91 advantageously bevel-shaped to facilitate the perforation of the flexible sheet 2 of the false ceiling 1 when a fire occurs.
  • the perforating element 92 is a cutting element provided with at least one cutting blade disposed along said beveled shape.
  • the perforating means 9 will move from its "rest position” to its "working position” (described below) and the cutting blade (s) will come into contact with the inner face of the flexible sheet 2 and then form at least one orifice in said flexible sheet 2 by cutting it.
  • the perforating element 92 is at least one heating element, of electrical resistance or heating cord type, disposed along the free edge of the body 91 and arranged to melt and / or burn the flexible ply 2 so as to to create an orifice to allow the passage and the dispersion of the products extinguishers in room 3 when a fire occurs.
  • perforating element 92 an entirely different element producing the same effects, such as needles or other pyrotechnic element for example, without departing from the scope of the present invention.
  • the perforation means 9 is able to slide inside said base 8 from its "rest position” in which its body 91 can be entirely contained in the base 8 of the fire extinguishing device 7 and where its perforating element 92 is located in the residual space 6 of the false ceiling 1 to its "working position” in which its body 91 is at least partially out of said base 8 and where its perforating element 92 has made an orifice in the flexible sheet 2 of the false ceiling 1 which it passes through, the perforating element 92 then being located at least partly under the visible outer face of said flexible sheet 2.
  • a propulsion means (not shown) to slide the perforating means 9 inside said base 8 using for example a hydraulic or pneumatic type actuator or all other pyrotechnic means and / or elastic return such as a spring.
  • the perforating means 9 is preferably coupled to a first fuse which holds it in the "rest position” until the heat generated by a fire is sufficient to melting said first fuse and releasing the piercing means 9 to its "working position".
  • the dispersing means 10 for the extinguishing products advantageously comprise at least one dispersion head of the automatic water extinguisher head type, commonly called "SPRINKLER", arranged to spread water in the room 3 when a fire occurs, said dispersing means 10 being for that purpose connected to a pressurized water pipe network (not shown) located in the space residual 6.
  • SPRINKLER automatic water extinguisher head type
  • the dispersing means 10 comprises at least one retractable dispersion head and arranged to be movable relative to the base 8 from a "rest position" to a "working position” in which said dispersion head is furthest from the base 8.
  • the dispersion head is advantageously housed in the perforation means 9 and arranged to slide inside said perforating means 9 from its "rest position” in which it can be entirely contained in said perforating means 9 and / or at least entirely located in the residual space 6 of the false ceiling 1 to its "working position” in which it is output of said perforating means 9 and passes through the flexible sheet 2 so that it is located under the outer face screws of said flexible sheet 2.
  • a propulsion means for sliding the dispersion means 10 inside said perforating means 9 using, for example, a hydraulic or pneumatic type actuator or else any other pyrotechnic means and / or elastic return such as a spring.
  • the dispersing means 10 is preferably coupled to a second fuse which holds it in the "rest position” until the heat generated by a fire is sufficient to melt said second fuse and release the dispersing means 10 to its "working position".
  • the second fuse so that it melts at a temperature higher than that required for the melting of the first fuse. It is also possible to provide delay means determining, for example, the triggering of the sliding of the dispersing means 10 after a lapse of time determined subsequent to the melting of the second fuse.
  • the fire-extinguishing device 7 is, in the "rest position", totally disposed in the residual space 6 at the rear of the flexible sheet 2 of the false ceiling 1, so that it is totally invisible for a person located in the room 3 under said flexible sheet 2, the "rest position" of the fire extinguishing device 7 being defined when the perforation means 9 and dispersion 10 are in the "rest position". It is therefore clear that this configuration makes it possible to maintain the visible external face uniformity of the flexible sheet 2 of the false ceiling 1.
  • the perforation means 9 directly forms an orifice during its passage from its "rest position” to its "working position", said orifice being the size of the perforating means 9 and therefore sufficient to allow the passage of the means of dispersion 10 contained in said perforation means 9.
  • the impact of the perforation means 9 on the flexible ply 2 may be limited to the creation of at least one orifice of smaller dimensions forming a rupture primer without departing from the scope of the present invention.
  • the passage orifice of the dispersing means 10 in the flexible ply 2 will then be formed by the end of the dispersing means 10 by passing through said flexible ply 2 during its transition from its "rest position" to its "working position ".
  • the perforating element 92 is a heating element only in contact with the inner face of the flexible ply 2 of the false ceiling 1 or disposed at a sufficiently small distance so that it can melt and / or burning the flexible web 2 to create an opening or a breakout primer.
  • the skilled person will easily adjust the temperature of this heating element in particular depending on the materials constituting the flexible web and the flexible web face 2 to melt and / or burn.
  • This perforating element 92 is advantageously fixed, but may also be movable between a "rest position" to a "working position” in which it is at least close to the inner face of the flexible ply 2 of the false ceiling 1.
  • this perforating element 92 is advantageously of flat non-beveled shape so that the whole of the heating element is in contact with the inner face of the flexible ply 2 of the false ceiling 1.
  • This variant embodiment is particularly interesting because it It is no longer necessary to exert a significant mechanical force to create the orifice or the beginning of rupture. As a result, the fire-extinguishing device 7 is simpler and more economical.
  • the fire extinguishing device 7 may also be coupled to at least one temperature sensor (not shown) disposed under the outer face of the flexible sheet 2 located on the side of the room 3, preferably at the periphery of said flexible sheet 2. This probe will be calibrated so that, when a fire occurs, it triggers successively at a certain temperature the means of perforation 9 and the dispersing means 10.
  • the fire-extinguishing device 7 according to the invention and the false-wall 1 comprising such a fire-extinguishing device may advantageously be used in any type of industrial preference location, whatever the orientation of said false-fire device.
  • the fire-extinguishing device 7 and the false-wall 1 according to the invention make it possible to maintain the uniformity of the visible outer face of the flexible sheet 2 of the false 1, while guaranteeing an effective dispersion of the extinguishing products in the room 3.
  • fire extinguishing device 7 for false wall 1 is only a particular illustration, in no way limiting of the invention; it is particularly applicable for false walls or for light boxes or not provided with false wall covering at least their lower horizontal open face.

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  • 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)

Description

Domaine techniqueTechnical area

La présente invention concerne un dispositif d'extinction d'incendie automatique de type dispersion de produits extincteurs tels que de l'eau par exemple, ledit dispositif étant destiné à être intégré à une fausse-paroi à toile tendue, et notamment un faux-plafond. La présente invention concerne une fausse-paroi comportant un tel dispositif d'extinction d'incendie automatique.The present invention relates to an automatic fire extinguishing device of dispersion type extinguishing products such as water, for example, said device being intended to be integrated into a false-wall fabric stretched, and in particular a false ceiling . The present invention relates to a false wall comprising such an automatic fire extinguishing device.

Technique antérieurePrior art

Le plus souvent, ces dispositifs d'extinction d'incendie comportent des têtes de dispersion et sont raccordés à un réseau de canalisations d'eau ou de produits dissous dans l'eau sous pression et disposés au plafond des locaux à protéger. Lesdits dispositifs réagissent de façon automatique lorsqu'un incendie se déclare. Ainsi, en cas d'incendie, la chaleur dégagée s'élève et atteint une des têtes de dispersion réparties sur le plafond. Sous l'effet de la chaleur, l'ampoule ou le fusible qui maintient ladite tête de dispersion fermée est détruite (l'ampoule contient de manière classique un alcool qui se met à bouillir sous l'effet de la chaleur et qui rompt ainsi la fine paroi de l'ampoule). La pression permanente dans la canalisation, à laquelle sont connectés lesdits dispositifs d'extinction d'incendie, se libère alors au travers de la tête de dispersion, arrosant ainsi la zone enflammée.Most often, these fire extinguishing devices comprise dispersing heads and are connected to a network of water pipes or products dissolved in water under pressure and arranged on the ceiling of the premises to be protected. Said devices react automatically when a fire occurs. Thus, in case of fire, the heat released rises and reaches one of the dispersion heads distributed on the ceiling. Under the effect of heat, the bulb or fuse which keeps said closed dispersion head is destroyed (the ampoule contains, in a conventional manner, an alcohol which boils under the effect of heat and which thus breaks the thin wall of the bulb). The permanent pressure in the pipe, to which said fire extinguishing devices are connected, is then released through the dispersion head, thereby watering the inflamed area.

Classiquement, ces dispositifs d'extinction d'incendie sont soit fixes et disposés en saillie sur le plafond des locaux à protéger, soit escamotables et disposés en partie dans ledit plafond.Conventionally, these fire extinguishing devices are either fixed and arranged projecting on the ceiling of the premises to be protected, or retractable and arranged partially in said ceiling.

Les fausses parois, notamment les faux plafonds, comprennent classiquement une ou plusieurs lisses d'accrochage qui sont fixées sur chacun des murs et/ou plafond d'un local, et une nappe souple et généralement opaque, qui est déformée par tension afin que ses bords, pourvus de moyens d'accrochage, puissent venir se fixer auxdites lisses à l'aide de ces moyens d'accrochage, en prenant soin de bien tendre la nappe afin d'offrir un bel aspect. Cette nappe est donc tendue parallèlement à une paroi du local de sorte à laisser un espace résiduel situé entre la paroi dudit local et ladite nappe. Cet espace résiduel, aussi nommé vélum, permet de loger tous les équipements inesthétiques tels que des câbles électriques, des tuyauteries, etc. Par conséquent, ladite nappe permet de masquer ces équipements mais aussi les imperfections des parois du local et d'avoir une face visible uniforme et propre en retenant notamment les poussières dans ce vélum.False walls, including false ceilings, conventionally comprise one or more stringers which are fixed on each of the walls and / or ceiling of a room, and a flexible sheet and generally opaque, which is deformed by tension so that its edges, provided with attachment means, can be fixed to said smooth with the aid of these attachment means, taking care to stretch the sheet well to offer a beautiful aspect. This sheet is thus stretched parallel to a wall of the room so as to leave a residual space between the wall of said room and said sheet. This residual space, also called velum, can accommodate all unsightly equipment such as electrical cables, pipes, etc. Therefore, said web allows to hide these equipment but also the imperfections of the walls of the room and to have a uniform and clean visible face including retaining dust in this velum.

Toutefois, lorsque des dispositifs d'extinction d'incendie tels que décrits précédemment sont intégrés à une fausse paroi à nappe tendue, l'uniformité de la face visible est rompue. En effet, lesdits dispositifs sont en tout ou partie en saillie par rapport à la face visible. De plus, comme le réseau de canalisations est disposé dans le vélum, on doit créer dans la nappe tendue des orifices pour recevoir les dispositifs d'extinction d'incendie, ce qui peut, compte tenu de la tension de la nappe, créer, d'une part, des problème d'étanchéité entre l'espace résiduel et le local et, d'autre part, des zones de faiblesses dans la nappe pouvant générer un aspect fripé, particulièrement inesthétique, de ladite nappe.However, when fire extinguishing devices as described above are integrated in a false stretch-walled wall, the uniformity of the visible side is broken. Indeed, said devices are wholly or partly projecting with respect to the visible face. Moreover, since the pipe network is arranged in the canopy, holes must be created in the stretched sheet to receive the fire-extinguishing devices, which can, given the tension of the sheet, create, firstly, leakage problems between the residual space and the room and, secondly, areas of weakness in the sheet may generate a crumpled appearance, particularly unsightly, said sheet.

Pour remédier à ces problèmes, on peut soigner l'étanchéité et renforcer la nappe au droit des orifices recevant les dispositifs d'extinction d'incendie. Toutefois, ceci a pour effet d'augmenter significativement le coût d'une telle installation.To remedy these problems, it is possible to heal the watertightness and reinforce the water table at the level of the orifices receiving the fire extinguishing devices. However, this has the effect of significantly increasing the cost of such an installation.

Par ailleurs, si on installe une nappe sous un plafond déjà pourvu de dispositifs d'extinction d'incendie et d'un réseau de canalisations, il faut alors rallonger toutes les canalisations pour amener lesdits dispositifs au droit des orifices prévus dans la nappe. Le surcoût engendré par cette modification du réseau de canalisations est loin d'être négligeable.Moreover, if we install a sheet under a ceiling already provided with fire extinguishing devices and a network of pipes, then we must extend all the pipes for bringing said devices to the right of the orifices provided in the sheet. The additional cost generated by this modification of the pipe network is far from negligible.

WO 2007/111897 divulgue un dispositif d'extinction d'incendie selon la préambule de la revendication 1. WO 2007/111897 discloses a fire extinguishing device according to the preamble of claim 1.

Exposé de l'inventionPresentation of the invention

Le but de la présente invention est donc de pallier les inconvénients précédemment cités et de proposer un dispositif d'extinction d'incendie de type dispersion pour fausse paroi à nappe tendue permettant de conserver l'uniformité de la face visible de ladite nappe et de ne pas intervenir sur le réseau de canalisations. En outre, ce dispositif d'extinction d'incendie, qui est simple et économique, n'est visible, que lorsqu'un incendie survient. De plus, ce dispositif d'extinction d'incendie est efficace, rapide et ne nécessite avantageusement pas d'exercer d'efforts mécaniques importants pour sa mise en oeuvre.The object of the present invention is therefore to overcome the above-mentioned drawbacks and to propose a dispersion-type fire extinguishing device for a false stretched-web wall making it possible to maintain the uniformity of the visible face of said sheet and not to not intervene on the network of pipes. In addition, this fire extinguishing device, which is simple and economical, is visible, only when a fire occurs. In addition, this fire extinguishing device is efficient, fast and does not require advantageously to exert significant mechanical forces for its implementation.

Conformément à l'invention, il est donc proposé un dispositif d'extinction d'incendie de type dispersion de produits extincteurs destiné à être intégré à l'arrière d'une fausse-paroi de type faux-plafond notamment et comprenant une nappe souple, ledit dispositif d'extinction d'incendie comportant un moyen de dispersion de produits extincteurs d'incendie, au moins une embase apte à être solidarisée à un support fixe et au moins un moyen de perforation apte à former au moins un orifice dans la nappe souple pour permettre la dispersion des produits extincteurs au travers de ladite nappe souple lorsqu'un incendie survient, le moyen de perforation comportant un corps et un élément perforant disposé à l'extrémité libre dudit corps. Ledit dispositif d'extinction d'incendie est remarquable en ce que l'élément perforant est au moins un élément chauffant agencé pour faire fondre et/ou brûler la nappe souple afin de créer au moins ledit orifice..According to the invention, it is therefore proposed a fire extinguishing device fire-extinguishing device intended to be integrated at the rear of a false-wall type ceilings in particular and comprising a flexible sheet, said fire extinguishing device comprising means for dispersing fire extinguishing agents, at least one base capable of being secured to a fixed support and at least one perforating means capable of forming at least one orifice in the flexible sheet; to allow dispersion of the extinguishing products through said flexible sheet when a fire occurs, the perforating means comprising a body and a perforating element disposed at the free end of said body. Said fire extinguishing device is remarkable in that the perforating element is at least one heating element arranged to melt and / or burn the flexible ply to create at least said orifice.

Selon un mode de réalisation préféré, le dispositif d'extinction d'incendie est en outre en partie escamotable et automatique.According to a preferred embodiment, the fire extinguishing device is also partly retractable and automatic.

La présente invention concerne aussi une fausse-paroi comprenant une nappe tendue accrochée par ses bords à une pluralité de lisses d'accrochage fixées au mur ou au plafond d'un local, ladite nappe souple étant tendue décalée d'une paroi dudit local de sorte à laisser entre elle et ladite paroi un espace résiduel remarquable en ce qu'elle comporte un dispositif d'extinction d'incendie selon l'invention.The present invention also relates to a false wall comprising a stretched sheet hung by its edges to a plurality of hanging rails attached to the wall or ceiling of a room, said flexible sheet being tensioned offset from a wall of said room so to leave between it and said wall a remarkable residual space in that it comprises a fire extinguishing device according to the invention.

Description sommaire des figuresBrief description of the figures

D'autres avantages et caractéristiques ressortiront mieux de la description qui va suivre d'une variante d'exécution d'un dispositif d'extinction d'incendie automatique selon l'invention en référence aux figures annexées sur lesquelles :

  • la figure 1 est une vue en coupe verticale partielle d'un dispositif d'extinction d'incendie selon l'invention intégré à un fausse-paroi comprenant une nappe souple tendue avec ses moyens de perforation et de dispersion en position repos ;
  • la figure 2 est une vue en coupe verticale partielle du dispositif d'extinction d'incendie de la figure précédente avec ses moyens de perforation en position de travail ;
  • la figure 3 est une vue en coupe verticale partielle du dispositif d'extinction d'incendie de la figure 1 avec ses moyens de perforation et de dispersion en position de travail.
Other advantages and features will become more apparent from the following description of an alternative embodiment of an automatic fire-extinguishing device according to the invention with reference to the appended figures in which:
  • the figure 1 is a partial vertical sectional view of a fire extinguishing device according to the invention integrated in a false wall comprising a flexible sheet stretched with its means of perforation and dispersion in the rest position;
  • the figure 2 is a partial vertical sectional view of the fire extinguishing device of the previous figure with its perforating means in the working position;
  • the figure 3 is a partial vertical sectional view of the fire suppression device of the figure 1 with its means of perforation and dispersion in working position.

Meilleure manière de réaliser l'invention techniqueBest way to realize the technical invention

On décrira, dans cette variante d'exécution non limitative, un dispositif d'extinction d'incendie intégré à une fausse-paroi 1 de type faux-plafond, toutefois, le dispositif d'extinction d'incendie, selon l'invention, peut évidemment être employé pour une fausse-paroi de type faux-mur.In this non-limiting embodiment variant, a fire extinguishing device incorporated in a false wall 1 of false ceiling type will be described, however, the fire extinguishing device according to the invention may obviously be used for a fake wall-type fake wall.

Ainsi, la figure 1 représente la partie supérieure d'un faux-plafond 1 comportant une nappe souple 2 tendue horizontalement en dessous du plafond (non représenté) d'un local 3. Cette nappe souple 2 est fixée le long de ses bords à une lisse 4, ladite lisse 4 étant formée de profils aboutés et fixée au mur 5 dudit local 3, par des moyens de fixation appropriés (non représentés), tels que des vis. Avec une telle configuration, il existe un espace résiduel 6, aussi nommé vélum, situé entre le plafond dudit local 3 et ladite nappe souple 2.So, the figure 1 represents the upper part of a false ceiling 1 comprising a flexible sheet 2 stretched horizontally below the ceiling (not shown) of a room 3. This flexible sheet 2 is fixed along its edges to a smooth 4, said smooth 4 being formed of abutting profiles and fixed to the wall 5 of said room 3, by appropriate fastening means (not shown), such as screws. With such a configuration, there is a residual space 6, also called velum, located between the ceiling of said room 3 and said flexible sheet 2.

En référence aux figures 1 à 3, le dispositif d'extinction d'incendie 7 comprend une embase 8, un moyen de perforation 9 apte à se déplacer par rapport à ladite embase 8 de préférence selon une direction sensiblement perpendiculaire à la face intérieure de la nappe souple 2 et un moyen de dispersion 10 de produits extincteurs d'incendie.With reference to Figures 1 to 3 , the fire extinguishing device 7 comprises a base 8, a perforation means 9 adapted to move relative to said base 8 preferably in a direction substantially perpendicular to the inner face of the flexible sheet 2 and a means of dispersion 10 of fire extinguishing products.

On désigne ici par « face intérieure » la face de la nappe souple 2 située du côté de l'espace résiduel 6 et donc par « face extérieure » la face de la nappe souple 2 située du côté du local 3.Here, the term "inner face" refers to the face of the flexible ply 2 located on the side of the residual space 6 and therefore "outer face" the face of the flexible ply 2 located on the side of the room 3.

Les produits extincteurs dispersés sont de préférence des produits agissant par refroidissement tels que de l'eau utilisée seule ou avec des additifs aptes à former un film isolant. Cependant, on comprend bien que l'on pourra utiliser comme produits extincteurs soit des poudres aptes à étouffer l'incendie en formant une couche imperméable vitreuse, soit des gaz inertes tels que du dioxyde de carbone (CO2), par exemple, permettant une diminution de la teneur en oxygène, sans sortir du cadre de la présente invention.The dispersed extinguishing products are preferably products acting by cooling such as water used alone or with additives capable of forming an insulating film. However, it is understood that it will be possible to use as extinguishing products either powders capable of quelling the fire by forming a vitreous impermeable layer, or inert gases such as carbon dioxide. carbon (CO 2 ), for example, allowing a decrease in the oxygen content, without departing from the scope of the present invention.

L'embase 8 est apte à être solidarisée à un support fixe et, de préférence, elle est solidaire du plafond du local 3 et a une forme tubulaire de section globalement circulaire orienté de manière à ce que son axe longitudinal soit sensiblement perpendiculaire à la face intérieure de la nappe souple 2.The base 8 is able to be secured to a fixed support and, preferably, it is integral with the ceiling of the room 3 and has a tubular shape of generally circular section oriented so that its longitudinal axis is substantially perpendicular to the face inside the flexible tablecloth 2.

Le moyen de perforation 9 comprend un corps 91 avantageusement de forme tubulaire de section globalement circulaire permettant le coulissement dudit moyen de perforation 9 à l'intérieur de ladite embase 8. En outre, le moyen de perforation 9 comporte, à son extrémité libre du corps 91 située du côté de la face intérieure de la nappe souple 2, un élément perforant 92, l'extrémité libre du corps 91 étant avantageusement en forme de biseau afin de faciliter la perforation de la nappe souple 2 du faux-plafond 1 lorsqu'un incendie survient.The perforation means 9 comprises a body 91 advantageously of tubular shape of generally circular cross-section allowing the sliding of said perforating means 9 inside said base 8. In addition, the perforating means 9 comprises, at its free end of the body 91 located on the side of the inner face of the flexible sheet 2, a perforating element 92, the free end of the body 91 advantageously bevel-shaped to facilitate the perforation of the flexible sheet 2 of the false ceiling 1 when a fire occurs.

Selon un premier mode préférentiel de réalisation, l'élément perforant 92 est un élément tranchant muni d'au moins une lame coupante disposée le long de ladite forme biseauté. Ainsi, en cas d'incendie, le moyen de perforation 9 va se déplacer de sa « position de repos » à sa « position de travail » (décrites plus loin) et la (ou les) lame(s) coupante(s) va venir en contact avec la face intérieure de la nappe souple 2 puis former au moins un orifice dans ladite nappe souple 2 en la coupant.According to a first preferred embodiment, the perforating element 92 is a cutting element provided with at least one cutting blade disposed along said beveled shape. Thus, in case of fire, the perforating means 9 will move from its "rest position" to its "working position" (described below) and the cutting blade (s) will come into contact with the inner face of the flexible sheet 2 and then form at least one orifice in said flexible sheet 2 by cutting it.

Selon un deuxième mode préférentiel de réalisation, l'élément perforant 92 est au moins un élément chauffant, de type résistance électrique ou cordon chauffant, disposé le long du bord libre du corps 91 et agencé pour fondre et/ou brûler la nappe souple 2 afin de créer un orifice pour permettre le passage et la dispersion des produits extincteurs dans le local 3 lorsqu'un incendie survient.According to a second preferred embodiment, the perforating element 92 is at least one heating element, of electrical resistance or heating cord type, disposed along the free edge of the body 91 and arranged to melt and / or burn the flexible ply 2 so as to to create an orifice to allow the passage and the dispersion of the products extinguishers in room 3 when a fire occurs.

On comprend bien que l'on pourra utiliser comme élément perforant 92 un tout autre élément produisant les mêmes effets, tels que des aiguilles ou autre élément pyrotechnique par exemple, sans sortir du cadre de la présente invention.It is well understood that it will be possible to use as perforating element 92 an entirely different element producing the same effects, such as needles or other pyrotechnic element for example, without departing from the scope of the present invention.

Le moyen de perforation 9 est apte à coulisser à l'intérieur de ladite embase 8 depuis sa « position de repos » dans laquelle son corps 91 peut être entièrement contenu dans l'embase 8 du dispositif d'extinction d'incendie 7 et où son élément perforant 92 est situé dans l'espace résiduel 6 du faux-plafond 1 jusqu'à sa « position de travail » dans laquelle son corps 91 est au moins en partie sorti de ladite embase 8 et où son élément perforant 92 a réalisé un orifice dans la nappe souple 2 du faux-plafond 1 qu'il traverse, l'élément perforant 92 étant alors situé au moins en partie sous la face extérieure visible de ladite nappe souple 2.The perforation means 9 is able to slide inside said base 8 from its "rest position" in which its body 91 can be entirely contained in the base 8 of the fire extinguishing device 7 and where its perforating element 92 is located in the residual space 6 of the false ceiling 1 to its "working position" in which its body 91 is at least partially out of said base 8 and where its perforating element 92 has made an orifice in the flexible sheet 2 of the false ceiling 1 which it passes through, the perforating element 92 then being located at least partly under the visible outer face of said flexible sheet 2.

L'Homme du Métier n'aura aucune difficulté pour concevoir un moyen de propulsion (non représenté) pour faire coulisser le moyen de perforation 9 à l'intérieur de ladite embase 8 en utilisant par exemple un actionneur de type hydraulique ou pneumatique ou encore tout autre moyen pyrotechnique et/ou de rappel élastique tel qu'un ressort.Those skilled in the art will have no difficulty in designing a propulsion means (not shown) to slide the perforating means 9 inside said base 8 using for example a hydraulic or pneumatic type actuator or all other pyrotechnic means and / or elastic return such as a spring.

Afin d'automatiser le dispositif d'extinction d'incendie 7, le moyen de perforation 9 est de préférence couplé à un premier fusible qui le maintient en « position de repos » jusqu'à ce que la chaleur dégagée par un incendie soit suffisante pour faire fondre ledit premier fusible et libérer le moyen de perforation 9 jusqu'à sa « position de travail ».In order to automate the fire extinguishing device 7, the perforating means 9 is preferably coupled to a first fuse which holds it in the "rest position" until the heat generated by a fire is sufficient to melting said first fuse and releasing the piercing means 9 to its "working position".

Le moyen de dispersion 10 des produits extincteurs comporte avantageusement au moins une tête de dispersion de type tête d'extincteur automatique à eau, communément nommée « SPRINKLER », agencée pour répandre de l'eau dans le local 3 lorsqu'un incendie survient, ledit moyen de dispersion 10 étant pour cela raccordé à un réseau de canalisation d'eau sous pression (non représenté) situé dans l'espace résiduel 6.The dispersing means 10 for the extinguishing products advantageously comprise at least one dispersion head of the automatic water extinguisher head type, commonly called "SPRINKLER", arranged to spread water in the room 3 when a fire occurs, said dispersing means 10 being for that purpose connected to a pressurized water pipe network (not shown) located in the space residual 6.

Afin d'augmenter l'efficacité de la dispersion et d'éviter de répandre des produits extincteurs dans l'espace résiduel 6, le moyen de dispersion 10 comporte au moins une tête de dispersion escamotable et agencée pour pouvoir être mobile par rapport à l'embase 8 depuis une « position de repos » jusqu'à une « position de travail » dans laquelle ladite tête de dispersion est le plus éloignée de l'embase 8. Dans un mode préférentiel de réalisation, la tête de dispersion est avantageusement logée dans le moyen de perforation 9 et agencée pour coulisser à l'intérieur dudit moyen de perforation 9 depuis sa « position de repos » dans laquelle elle peut être entièrement contenu dans ledit moyen de perforation 9 et/ou au moins situé en totalité dans l'espace résiduel 6 du faux plafond 1 jusqu'à sa « position de travail » dans laquelle elle est sortie dudit moyen de perforation 9 et traverse la nappe souple 2 pour qu'elle soit située sous la face extérieure visible de ladite nappe souple 2.In order to increase the effectiveness of the dispersion and to avoid spreading extinguishing products in the residual space 6, the dispersing means 10 comprises at least one retractable dispersion head and arranged to be movable relative to the base 8 from a "rest position" to a "working position" in which said dispersion head is furthest from the base 8. In a preferred embodiment, the dispersion head is advantageously housed in the perforation means 9 and arranged to slide inside said perforating means 9 from its "rest position" in which it can be entirely contained in said perforating means 9 and / or at least entirely located in the residual space 6 of the false ceiling 1 to its "working position" in which it is output of said perforating means 9 and passes through the flexible sheet 2 so that it is located under the outer face screws of said flexible sheet 2.

L'Homme du Métier n'aura aucune difficulté pour concevoir un moyen de propulsion (non représenté) pour faire coulisser le moyen dispersion 10 à l'intérieur dudit moyen de perforation 9 en utilisant par exemple un actionneur de type hydraulique ou pneumatique ou encore tout autre moyen pyrotechnique et/ou de rappel élastique tel qu'un ressort.Those skilled in the art will have no difficulty in designing a propulsion means (not shown) for sliding the dispersion means 10 inside said perforating means 9 using, for example, a hydraulic or pneumatic type actuator or else any other pyrotechnic means and / or elastic return such as a spring.

Afin d'automatiser le dispositif d'extinction d'incendie 7, le moyen de dispersion 10 est de préférence couplé à un second fusible qui le maintient en « position de repos » jusqu'à ce que la chaleur dégagée par un incendie soit suffisante pour faire fondre ledit second fusible et libérer le moyen de dispersion 10 jusqu'à sa « position de travail ».In order to automate the fire extinguishing device 7, the dispersing means 10 is preferably coupled to a second fuse which holds it in the "rest position" until the heat generated by a fire is sufficient to melt said second fuse and release the dispersing means 10 to its "working position".

Toutefois, pour que le dispositif d'extinction d'incendie 7 fonctionne bien, on comprend que le moyen de perforation 9 doit être en « position de travail » avant que le moyen de dispersion 10 soit en « position de travail ».However, for the fire extinguishing device 7 to work well, it is understood that the perforating means 9 must be in "working position" before the dispersing means 10 is in "working position".

Ainsi, le coulissement du moyen de dispersion 10 ne doit être déclenché qu'une fois le moyen de perforation 9 en « position de travail ».Thus, the sliding of the dispersing means 10 must be triggered only once the means of perforation 9 in "working position".

Pour ce faire, on peut choisir le second fusible pour qu'il fonde à une température supérieure à celle nécessaire à la fusion du premier fusible. On peut également prévoir des moyens de temporisation déterminant, par exemple, le déclenchement du coulissement du moyen de dispersion 10 qu'après un lapse de temps déterminé consécutif à la fusion du second fusible.To do this, we can choose the second fuse so that it melts at a temperature higher than that required for the melting of the first fuse. It is also possible to provide delay means determining, for example, the triggering of the sliding of the dispersing means 10 after a lapse of time determined subsequent to the melting of the second fuse.

Le dispositif d'extinction d'incendie 7 est, en « position de repos », totalement disposé dans l'espace résiduel 6 à l'arrière de la nappe souple 2 du faux-plafond 1, de sorte qu'il est totalement invisible pour une personne située dans le local 3 sous ladite nappe souple 2, la « position de repos » du dispositif d'extinction d'incendie 7 étant définie lorsque les moyens de perforation 9 et de dispersion 10 sont en « position de repos ». On comprend donc que cette configuration permet de conserver l'uniformité de face extérieure visible de la nappe souple 2 du faux-plafond 1.The fire-extinguishing device 7 is, in the "rest position", totally disposed in the residual space 6 at the rear of the flexible sheet 2 of the false ceiling 1, so that it is totally invisible for a person located in the room 3 under said flexible sheet 2, the "rest position" of the fire extinguishing device 7 being defined when the perforation means 9 and dispersion 10 are in the "rest position". It is therefore clear that this configuration makes it possible to maintain the visible external face uniformity of the flexible sheet 2 of the false ceiling 1.

Dans l'exemple décrit, le moyen de perforation 9 forme directement un orifice lors de son passage de sa « position de repos » à sa « position de travail », ledit orifice étant de la taille du moyen de perforation 9 et donc suffisant pour permettre le passage du moyen de dispersion 10 contenu dans ledit moyen de perforation 9. Il est bien entendu, que l'impact du moyen de perforation 9 sur la nappe souple 2 pourra être limité à la création d'au moins un orifice de plus petites dimensions formant une amorce de rupture, sans sortir du cadre de la présente invention. L'orifice de passage du moyen de dispersion 10 dans la nappe souple 2 sera alors formé par l'extrémité du moyen de dispersion 10 en traversant ladite nappe souple 2 lors de son passage de sa « position de repos » à sa « position de travail ».In the example described, the perforation means 9 directly forms an orifice during its passage from its "rest position" to its "working position", said orifice being the size of the perforating means 9 and therefore sufficient to allow the passage of the means of dispersion 10 contained in said perforation means 9. It is understood that the impact of the perforation means 9 on the flexible ply 2 may be limited to the creation of at least one orifice of smaller dimensions forming a rupture primer without departing from the scope of the present invention. The passage orifice of the dispersing means 10 in the flexible ply 2 will then be formed by the end of the dispersing means 10 by passing through said flexible ply 2 during its transition from its "rest position" to its "working position ".

Description d'autres modes de réalisationDescription of other embodiments

Dans une variante de réalisation non représentée, l'élément perforant 92 est un élément chauffant seulement en contact avec la face intérieure de la nappe souple 2 du faux-plafond 1 ou disposé à une distance suffisamment faible pour qu'il puisse faire fondre et/ou brûler la nappe souple 2 afin de créer un orifice ou une amorce de rupture. L'Homme du Métier règlera facilement la température de cet élément chauffant notamment en fonction des matériaux constituant la nappe souple et de la face de nappe souple 2 à faire fondre et/ou brûler. Cet élément perforant 92 est avantageusement fixe, mais pourra également être mobile entre une « position de repos » à une « position de travail » dans laquelle il est au moins proche de la face intérieure de la nappe souple 2 du faux-plafond 1. Enfin, cet élément perforant 92 est avantageusement de forme plate non biseautée afin que l'ensemble de l'élément chauffant soit en contact avec la face intérieure de la nappe souple 2 du faux-plafond 1. Cette variante de réalisation est particulièrement intéressante car il n'est plus nécessaire d'exercer un effort mécanique important pour créer l'orifice ou amorce de rupture. De ce fait, le dispositif d'extinction d'incendie 7 est plus simple et plus économique.In an alternative embodiment not shown, the perforating element 92 is a heating element only in contact with the inner face of the flexible ply 2 of the false ceiling 1 or disposed at a sufficiently small distance so that it can melt and / or burning the flexible web 2 to create an opening or a breakout primer. The skilled person will easily adjust the temperature of this heating element in particular depending on the materials constituting the flexible web and the flexible web face 2 to melt and / or burn. This perforating element 92 is advantageously fixed, but may also be movable between a "rest position" to a "working position" in which it is at least close to the inner face of the flexible ply 2 of the false ceiling 1. Finally this perforating element 92 is advantageously of flat non-beveled shape so that the whole of the heating element is in contact with the inner face of the flexible ply 2 of the false ceiling 1. This variant embodiment is particularly interesting because it It is no longer necessary to exert a significant mechanical force to create the orifice or the beginning of rupture. As a result, the fire-extinguishing device 7 is simpler and more economical.

En outre, pour automatiser son fonctionnement, le dispositif d'extinction d'incendie 7 pourra également être couplé à au moins une sonde de température (non représentée) disposée sous la face extérieure de la nappe souple 2 située du côté du local 3, de préférence en périphérie de ladite nappe souple 2. Cette sonde sera calibrée pour que, lorsqu'un incendie survient, elle déclenche successivement à une certaine température le moyen de perforation 9 et le moyen de dispersion 10.In addition, to automate its operation, the fire extinguishing device 7 may also be coupled to at least one temperature sensor (not shown) disposed under the outer face of the flexible sheet 2 located on the side of the room 3, preferably at the periphery of said flexible sheet 2. This probe will be calibrated so that, when a fire occurs, it triggers successively at a certain temperature the means of perforation 9 and the dispersing means 10.

Possibilité d'application industriellePossibility of industrial application

Le dispositif d'extinction d'incendie 7 selon l'invention et la fausse-paroi 1 comportant un tel dispositif d'extinction d'incendie peuvent avantageusement être utilisés dans tout type de lieu de préférence industriel quelque soit l'orientation de ladite fausse-paroi 1. En outre, il ressort clairement de la description que le dispositif d'extinction d'incendie 7 et la fausse-paroi 1 selon l'invention permettent de conserver l'uniformité de face extérieure visible de la nappe souple 2 de la fausse-paroi 1, tout en garantissant une dispersion efficace des produits extincteurs dans le local 3.The fire-extinguishing device 7 according to the invention and the false-wall 1 comprising such a fire-extinguishing device may advantageously be used in any type of industrial preference location, whatever the orientation of said false-fire device. In addition, it is clear from the description that the fire-extinguishing device 7 and the false-wall 1 according to the invention make it possible to maintain the uniformity of the visible outer face of the flexible sheet 2 of the false 1, while guaranteeing an effective dispersion of the extinguishing products in the room 3.

Enfin, il va de soi que l'exemple de dispositif d'extinction d'incendie 7 pour fausse-paroi 1 conforme à l'invention qui vient d'être décrit n'est qu'une illustration particulière, en aucun cas limitative de l'invention ; elle est notamment applicable pour de faux-mur ou encore pour des caissons lumineux ou non pourvus de fausse-paroi recouvrant au moins leur face inférieure horizontale ouverte.Finally, it goes without saying that the example of fire extinguishing device 7 for false wall 1 according to the invention which has just been described is only a particular illustration, in no way limiting of the invention; it is particularly applicable for false walls or for light boxes or not provided with false wall covering at least their lower horizontal open face.

Claims (17)

  1. A fire extinguishing device (7) of the extinguishing products spraying type intended to be incorporated behind a false wall (1) of the false ceiling type, in particular, and comprising a flexible web (2) with said fire extinguishing device (7) comprising means for spraying (10) fire extinguishing products, at least one base (8) able to be made integral with a fixed support and at least one perforating means (9) able to form at least one hole in the flexible web (2) to enable the spraying of the extinguishing products through said flexible web (2) when a fire occurs, with the perforating means (9) comprising a body (91) and a perforating element (92) positioned at the free end of said body (91), with said fire extinguishing device (7) being characterized in that the perforating element (92) is at least one heating element so arranged as to melt and/or burn the flexible web (2) in order to from the at least one hole.
  2. A fire extinguishing device (7) according to the preceding claim, characterized in that the perforating means (9) is so arranged as to be movable with respect to the base (8) between an "off-position" and an "on-position", wherein it made at least one hole in the flexible web (2).
  3. A fire extinguishing device (7) according to the preceding claim, characterized in that the body (91) of the perforating means (9) is able to slide at least partially inside said base (8).
  4. A fire extinguishing device (7) according to any one of claims 1 to 3, characterized in that the free end of said body (91) is tapered.
  5. A fire extinguishing device (7) according to any one of claims 1 to 4, characterized in that the perforating means (9) is coupled to at least a first fuse so arranged as to keep same in the "off-position" until said first fuse melts and releases the perforating means (9) to the "on-position" thereof, when a fire occurs.
  6. A fire extinguishing device (7) according to any one of claims 1 to 5, characterized in that the spraying means (10) includes at least one spraying head of the "SPRINKLER" type.
  7. A fire extinguishing device (7) according to any one of claims 1 to 6, characterized in that the spraying means (10) includes at least one retractable spraying head so arranged as to be movable with respect to the base (8) from an "off-position" to an "on-position" wherein said spraying head is furthermost from the base (8).
  8. A fire extinguishing device (7) according to the preceding claim, characterized in that the spraying head of the spraying means (10) is accommodated in the perforating means (9) and so arranged as to slide inside said perforating means (9) from the "off-position" thereof to the "on-position" thereof, wherein it comes out of said perforating means (9).
  9. A fire extinguishing device (7) according to any one of the preceding claims, characterized in that the spraying means (10) is coupled to at least a second fuse so arranged as to keep same in the "off-position" until said second fuse melts and releases said spraying means (10) to the "on-position" thereof, when a fire occurs.
  10. A fire extinguishing device (7) according to the preceding claim, characterized in that the first and second fuses are so arranged that, in case of a fire, the perforating means (9) is in the "on-position" before the spraying means (10) is released to the "on-position" thereof.
  11. A fire extinguishing device (7) according to any one of the preceding claims, characterized in that it is coupled to at least one temperature probe.
  12. A fire extinguishing device (7) according to the preceding claim, characterized in that the temperature probe is positioned at the periphery of the flexible web (2) under the outer face thereof, located on the room (3) side.
  13. A fire extinguishing device (7) according to any one of claims 11 or 12, characterized in that the temperature probe successively releases the perforating means (9) and the spraying means (10), when a fire occurs.
  14. A false wall (1) comprising a stretched flexible web (2), characterized in that it includes a fire extinguishing device (7) according to any one of claims 1 to 13.
  15. A false wall (1) according to the preceding claim, characterized in that the fire extinguishing device (7) is so arranged that the perforating element (92) is located, in the "off-position", behind the flexible web (2) and, in the "on-position", at least in contact with said flexible web (2).
  16. A false wall (1) according to the any one of claims 14 or 15, characterized in that the fire extinguishing device (7) is so arranged that the spraying head of the spraying means (10) thereof is located, in the "off-position", behind the flexible web (2) and, in the "on-position", at least under the visible outer face of said flexible web (2).
  17. A false wall (1) according to any one of claims 14 to 16, characterized in that the edges of flexible web (2) stretched are fixed on a plurality of fastening plates (4) fixed to the wall (5) or to the ceiling of a room (3), with said flexible web (2) being stretched spaced from the wall (5) or from the ceiling of said room (3), so as to leave a residual space (6) between the web and the wall (5) or the ceiling.
EP20110158495 2010-03-16 2011-03-16 Fire-extinguishing device for a false wall Active EP2366436B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1001036A FR2957524B1 (en) 2010-03-16 2010-03-16 FIRE EXTINGUISHING DEVICE FOR FALSE WALL

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EP2366436A1 EP2366436A1 (en) 2011-09-21
EP2366436B1 true EP2366436B1 (en) 2013-07-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107663918A (en) * 2017-09-30 2018-02-06 山东万得福装饰工程有限公司 Integrated equipment band for furred ceiling

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114775886B (en) * 2022-05-14 2023-01-17 韶关龙督装饰材料有限公司 Sound-absorbing heat-insulating environment-friendly decorative aluminum ceiling

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Publication number Priority date Publication date Assignee Title
US4147216A (en) * 1977-05-10 1979-04-03 Aai Corporation Penetrator/nozzle arrangement
WO2007111897A1 (en) * 2006-03-22 2007-10-04 Federal Express Corporation Fire suppressant device and method, including expansion agent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107663918A (en) * 2017-09-30 2018-02-06 山东万得福装饰工程有限公司 Integrated equipment band for furred ceiling
CN107663918B (en) * 2017-09-30 2019-05-21 山东万得福装饰工程有限公司 Integrated equipment band for furred ceiling

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FR2957524B1 (en) 2013-04-26
FR2957524A1 (en) 2011-09-23

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