EP2958638B1 - Dry drop intended to be mounted in a fireprotection installation of the type comprising a network of vacuum sprinklers - Google Patents

Dry drop intended to be mounted in a fireprotection installation of the type comprising a network of vacuum sprinklers Download PDF

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Publication number
EP2958638B1
EP2958638B1 EP14710001.0A EP14710001A EP2958638B1 EP 2958638 B1 EP2958638 B1 EP 2958638B1 EP 14710001 A EP14710001 A EP 14710001A EP 2958638 B1 EP2958638 B1 EP 2958638B1
Authority
EP
European Patent Office
Prior art keywords
blocking
nozzle
candle
sprinkler
dry
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.)
Not-in-force
Application number
EP14710001.0A
Other languages
German (de)
French (fr)
Other versions
EP2958638A2 (en
Inventor
Maurice Kadoche
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.)
Vactec SAS
Original Assignee
Vactec SAS
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Filing date
Publication date
Application filed by Vactec SAS filed Critical Vactec SAS
Priority to PL14710001T priority Critical patent/PL2958638T3/en
Publication of EP2958638A2 publication Critical patent/EP2958638A2/en
Application granted granted Critical
Publication of EP2958638B1 publication Critical patent/EP2958638B1/en
Not-in-force legal-status Critical Current
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/68—Details, e.g. of pipes or valve systems
    • 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
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C35/00—Permanently-installed equipment
    • A62C35/58—Pipe-line systems
    • A62C35/62—Pipe-line systems dry, i.e. empty of extinguishing material when not in use
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A62C37/10—Releasing means, e.g. electrically released
    • A62C37/11—Releasing means, e.g. electrically released heat-sensitive
    • A62C37/12—Releasing means, e.g. electrically released heat-sensitive with fusible links
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A62C37/10—Releasing means, e.g. electrically released
    • A62C37/11—Releasing means, e.g. electrically released heat-sensitive
    • A62C37/14—Releasing means, e.g. electrically released heat-sensitive with frangible vessels
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/002—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods
    • A62C3/004—Fire prevention, containment or extinguishing specially adapted for particular objects or places for warehouses, storage areas or other installations for storing goods for freezing warehouses and storages

Definitions

  • the field of the invention is that of the design and manufacture of fire fighting equipment and installations. More specifically, the invention relates to the devices designated by the term "dry candle", intended in particular to fight against fires in cold rooms.
  • the role of an automatic fire extinguishing system using sprinklers is to detect, as soon as possible, a fire and then automatically trigger the extinguishing system, at least locally, while emitting an alarm.
  • the purpose of the installation is to contain as much as possible the fire, before the arrival of the firefighters who then take over the installation to extinguish the fire.
  • the fuse is calibrated to burst when a certain temperature is exceeded, thus releasing the nozzle from its sealing cap.
  • underwater systems are not suitable for sites with frost risks. Indeed, in case of frost, the water can not flow.
  • the gel can cause damage to the piping of the installation (deformation or burst pipes).
  • the installation is then put out of water.
  • the site to be protected is heated to avoid any risk of frost.
  • energy consumption, and therefore the heating bill can be considerable, even prohibitive.
  • Another way to fight against freezing is to add an antifreeze to the water of the installation, such as glycol, which is a toxic and carcinogenic product.
  • the water can in some cases take up to 60 seconds to reach the sprinkler whose fuse is burst, which is certainly in line with the standard in force but may be too long vis-à-vis vis of some fire starts.
  • vacuum systems have been designed.
  • a vacuum is created in the pipes extending between a general valve and the set of sprinklers.
  • all the pipes separating the valve from the sprinklers are under vacuum.
  • vacuum is an active energy that serves as a functional source for sprinkler monitoring. Indeed, if a fuse of one of the sprinklers bursts, the atmospheric pressure wins the entire installation, which causes the change of state of an actuator which, in turn, opens the general valve of arrival of water. It follows that the water invades quickly and without obstacles the entire installation to the sprinklers, the water flowing through the sprinkler (s) where the fuse has burst. The still active vacuum in the networks quickly attracts the extinguishing water to the sprinklers whose fuse has burst.
  • the tripping time of the actuator is very short, since when a fuse bursts, the "vacuum" installation immediately generates a phenomenon of suction of the air outside the installation. It should be noted that this suction can be beneficial, the suction effect on the fire focus to reduce the intensity of it.
  • the water inlet time of the sprinkler with the fuse blown is less than 60 seconds.
  • dry candles provide the link between a pipe of the network of sprinklers "under vacuum” and the interior of the cold room.
  • the dry candles have an elongate body having at one of its ends a connection piece to a pipe and at the other end thereof, a sprinkler of the type described above.
  • the height of the elongate body is sized according to the thickness of the heat insulating wall of the ceiling of the cold room.
  • this dimension of the elongate body is such that the sprinkler carried by the lower end of the dry candle extends into the internal volume of the cold room.
  • the dry candles include closure means of the connection, consisting of a first nozzle, between the candle and the piping that carries it.
  • the shutter means at the first nozzle remain in the closed position and isolate the candle from the water present in the sprinkler system.
  • the sprinklers present at the lower end of the dry candles comprise, in addition to the fuse and the sealing cap, means for ejecting the cover.
  • ejection means are mounted on each sprinkler.
  • These ejection means are conventionally constituted by a spring inserted in a cylindrical part mounted in the nozzle of the sprinkler. One end of the spring is supported at the bottom of the cylindrical part, while the other end of the spring bears on the shutter held in position by the fuse. The spring is of course in the compressed state.
  • the lid may remain in a position of partial closure of the nozzle of the connector or in a position detrimental to the good diffusion of water.
  • the spring is not ejected from the nozzle and therefore remains inside of it.
  • the invention aims to provide a dry candle whose design can limit replacement costs in case of triggering thereof.
  • the invention also aims to provide such a dry candle whose maintenance can be performed quickly and easily.
  • the invention also aims to provide such a dry candle which ensures, at the sprinkler, a total release of the nozzle of the fitting in case of bursting fuse.
  • the object of the invention is to guarantee in all circumstances a minimum tripping time of the actuator of a "vacuum" system.
  • the means for discharging water are provided, as will be explained in more detail later, to evacuate the water introduced into the elongated body of the dry candle due to slight leaks.
  • the connecting means comprise an axis, the body of the candle including guide means in longitudinal translation of said axis.
  • closure means of the first nozzle are advantageously secured to one end of said axis.
  • the guide means preferably comprise at least one intermediate piece between two sections of the body of the candle, the part being perforated and having a central slide inside which the axis is guided in translation.
  • At least one spring is mounted between a stop means on the axis and the intermediate piece, the mounting of the spring being made so that the spring is in compression in the closed positions of the seal. shutter and means for sealing the first nozzle.
  • Such an assembly will contribute to the responsiveness of the dry candle in case of triggering thereof due to the bursting of the fuse of his sprinkler.
  • the axis advantageously carries a stop intended to abut against an intermediate piece and to retain the axis when the closure cap and the closure means of the first nozzle means are not in position d shutter.
  • said end section is connected to another portion of the body by a perforated intermediate piece and having a central slide inside which the axis is guided in translation.
  • a perforated intermediate piece and having a central slide inside which the axis is guided in translation.
  • the means for ejecting the shutter of the sprinkler are mounted outside the second nozzle and act in traction on the shutter.
  • the connecting piece 50 is intended to allow the connection of the dry candle to a pipe, and includes for this purpose a first nozzle 51 capable of ensuring the connection between the candle and the pipe.
  • the dry candle also includes means 60 for closing off said first nozzle 51, these shut-off means being movable between a closed position of the nozzle 51 (FIGS. figure 2 ) and a release position of the nozzle 51 ( figure 1 ).
  • the fuse 2 presses, at one of its ends, on the cap 3 so as to maintain it in its closed position of the second nozzle, the other end of the fuse resting on a lug 20 integral with the stirrup and, in this case, the deflector 12 (the pin 20 is in practice also a screw fixing means of the deflector on the stirrup).
  • the fuse 2 presses, at one of its ends, on the cap 3 so as to maintain it in its closed position of the second nozzle 10, the other end of the fuse resting on a lug 20 secured to the yoke and, in this case, the deflector 12 (the lug 20 is in practice also a fastening means by screwing the deflector on the caliper).
  • the dry candle comprises connecting means 6 between the closure means 60 of the first nozzle 51 on the one hand, and on the other hand, the sealing cap 3 of the second nozzle 10 , these connecting means being movable so as to make the closure position of the lid 3 coincide with the closed position of the closure means 60 of the first nozzle 51.
  • the connecting means 6 comprise an axis extending inside the elongated body of the candle, and on the end of which are secured the closure means 60 of the first nozzle 51.
  • the end of the axis constituting the connecting means and provided with a thread, and the closure means 60 are constituted by a head having a bore, so that the head of the closure means is screwed to the corresponding end of the axis.
  • the axis has a cup 61 intended to bear, as illustrated by the figure 2 against the base 30 of the shutter 3.
  • the axis of the connecting means is guided in longitudinal translation, this by means of guiding means comprising, as it appears on the Figures 1 and 2 , two intermediate pieces 52, 53.
  • Each of these intermediate pieces is perforated inside the body of the candle, and has a diametrical branch 520, 530 having in its middle a slide 521, 531 inside which the axis of the connecting means 6 is guided in translation.
  • the axis of the connecting means has a stop means 62 provided for mounting a spring 7 in compression between the stop means 62 and the intermediate piece 52.
  • the spring is in compression in the service configuration of the candle, that is to say when it is presented with the lid and the closure means of the first nozzle both in the closed position as illustrated by the figure 2 .
  • the spring 7 tends to push the axis of the connecting means down to its relaxed position as illustrated by the figure 1 , which causes the displacement of the shutter means 60 of the first nozzle 51, so as to release the latter and to communicate the interior of the candle with the piping (not shown) of the sprinkler system.
  • the axis of the connecting means carries a stop 63 intended to bear against an intermediate piece, in this case the intermediate piece 53, to retain the axis when the lid 3 and the closure means 60 are not in the closed position ( figure 1 ).
  • the plug 562 itself has a cavity communicating with the conduit 560, and extending in the continuity of the conduit 560 with the same inclination.
  • plug 562 On the inner side of the end section, plug 562 has a ball retaining grid through which water can flow.
  • the plug head 562 is traversed by an orifice for discharging the water to the outside of the end section.
  • the ball is at the bottom of the plug cavity (the ball having a diameter that does not obstruct the passage of water in the lower position in the plug cavity).
  • the system of the evacuation means according to the invention is advantageous in case of slight leaks between the candle and the conduit to which it is connected. Indeed, in the presence of slight leaks (which will not trigger the installation that is intended to restore the vacuum in case of leaks below a predetermined level), the candle will allow, from the low position of the ball allowing a air passage to the outer end of the inclined pipe, an aspiration tending to evacuate the water droplets that may be present in the candle.
  • the ball rises against the head of the cap, and is pressed against the orifice through the head of the plug so as to obstruct it and to prohibit the flow of water.
  • the sprinkler comprises ejection means mounted outside the nozzle 10 and acting in traction on the lid 3.
  • ejection means mounted outside the nozzle 10 and acting in traction on the lid 3.
  • the ejection means are constituted by a spring, and more specifically by a torsion spring 4, as illustrated by the Figures 5 to 7 .
  • the spring 4 In the relaxed state, the spring 4 has a configuration in which the branches 41 and 42 are spaced from each other, as illustrated by the figure 5 while, in the armed state, the two limbs 41 and 42 are brought closer to one another, as illustrated by the figure 6 .
  • the branches 41 and 42 In the armed state, according to the operating principle of a torsion spring, the branches 41 and 42 tend to exert a force on the elements that hold them in this position, to return to their respective positions corresponding to the relaxed state as illustrated by figure 5 in the relaxed state.
  • Such a spring is thus intended to cooperate by one of its branches (in this case the branch 41) with the lid to eject it from the sprinkler after bursting of the fuse 2.
  • the lid 3 has a flange 31 extending out of the second nozzle 10 and having a flared shape.
  • the lid 3 is held in abutment against a washer 11 mounted at the end of the nozzle 10.
  • the flared flange 31 of the seal with the washer 11 a space 110.
  • the spring 4 is mounted on the sprinkler so that one of its branches (in this case the branch 41) comes to be placed in the space 110, that is to say between the flange 31 flared and the washer 11 sprinkler. More specifically, the space 110 between the flange 31 and the washer 11 is provided so that the corresponding branch of the spring is stuck in this space once the fuse installed. The spring is thus safely kept in the waiting position.
  • the branch 41 has a curved shape intended to match the shape of the collar, the latter having a circular section.
  • the washer 11 has a passage of circular shape and that the cap 30 of the cap 3 is introduced into the passage of the washer, thus extending inside the second nozzle 10, until that the washer of flared shape, and more precisely frustoconical, comes to bear on the edges of the passage of the washer, closing it.
  • the branch 41 of the spring 4 is thus inserted into the space 110 between the flange 31 and the washer 11, while the other leg 42 of the spring 4 is held in a retaining means present on the coupling, positioned so that the spring takes of course its armed configuration as illustrated by the figure 6 .
  • this retaining means takes the form of an orifice 130 formed at the base of the stirrup 13, and intended to be traversed by the branch 42 as illustrated by FIG. figure 4 .
  • the two parts form a bend so that the end portion is able to go up through the orifice 130 of the stirrup, this with respect to the proximal part (according to the position of the winding relative to the at the orifice, it can also be considered that the proximal portion descends relative to the distal portion once it is inserted into the orifice).

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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

Le domaine de l'invention est celui de la conception et de la fabrication des équipements et installations de lutte contre les incendies. Plus précisément, l'invention concerne les dispositifs désignés par le terme de « chandelle sèche », destinés notamment à lutter contre les incendies à l'intérieur de chambres froides.The field of the invention is that of the design and manufacture of fire fighting equipment and installations. More specifically, the invention relates to the devices designated by the term "dry candle", intended in particular to fight against fires in cold rooms.

Le rôle d'une installation d'extinction automatique d'incendie mettant en oeuvre des sprinklers est de détecter, le plus tôt possible, un foyer d'incendie puis de déclencher automatiquement le système d'extinction, au moins localement, ceci tout en émettant une alarme. L'installation a pour objectif de contenir le plus possible l'incendie, avant l'arrivée des sapeurs-pompiers qui prennent alors le relais de l'installation pour éteindre l'incendie.The role of an automatic fire extinguishing system using sprinklers is to detect, as soon as possible, a fire and then automatically trigger the extinguishing system, at least locally, while emitting an alarm. The purpose of the installation is to contain as much as possible the fire, before the arrival of the firefighters who then take over the installation to extinguish the fire.

Dans le domaine de l'invention, les installations de lutte contre les incendies sont classées en trois catégories, à savoir :

  • les systèmes « sous eau » ;
  • les systèmes « sous air » ;
  • les systèmes « sous vide ».
In the field of the invention, the fire-fighting installations are classified in three categories, namely:
  • underwater systems;
  • "under the air"systems;
  • "vacuum" systems.

Dans ces trois systèmes, les sprinklers sont montés en réseau de façon à être régulièrement répartis sur le site à protéger. Classiquement, les sprinklers comprennent :

  • un raccord de fixation, permettant de relier le sprinkler à une tuyauterie, ce raccord de fixation présentant un ajutage destiné au passage de l'eau à libérer pour éteindre l'incendie ;
  • un fusible ;
  • un opercule d'obturation de l'ajutage, maintenu en position d'obturation par le fusible.
In these three systems, the sprinklers are networked so as to be regularly distributed on the site to be protected. Classically, sprinklers include:
  • a fixing connection, for connecting the sprinkler to a pipe, this fixing fitting having a nozzle for the passage of water to release to extinguish the fire;
  • a fuse;
  • a sealing cap of the nozzle, held in the closed position by the fuse.

Le fusible est calibré pour éclater lorsqu'une certaine température est dépassée, libérant ainsi l'ajutage de son opercule d'obturation.The fuse is calibrated to burst when a certain temperature is exceeded, thus releasing the nozzle from its sealing cap.

Dans les systèmes « sous eau », l'ensemble de la tuyauterie de l'installation est remplie d'eau, ceci jusqu'aux sprinklers. L'eau est donc en attente derrière le moyen d'obturation et lorsque le fusible éclate, l'eau s'écoule au travers de l'ajutage du raccord du sprinkler dont le fusible a éclaté.In "underwater" systems, all the piping in the installation is filled with water, right down to the sprinklers. The water is therefore waiting behind the sealing means and when the fuse bursts, the water flows through the nozzle of the sprinkler fitting whose fuse has burst.

Le temps de libération de l'eau est donc immédiat, ce qui est particulièrement avantageux. En revanche, les systèmes « sous eau », ne sont pas adaptés pour les sites présentant des risques de gel. En effet, en cas de gel, l'eau ne peut pas s'écouler. De plus, le gel peut causer des détériorations à la tuyauterie de l'installation (déformation voire éclatement des tuyaux). Dans certains cas, l'installation est alors mise hors d'eau. Dans d'autres cas, le site à protéger est chauffé pour éviter tout risque de gel. Pour les sites à protéger présentant une surface relativement importante, la consommation d'énergie, et par conséquent la facture de chauffage, peut s'avérer considérable, voire prohibitive. Une autre façon de lutter contre le gel est d'ajouter à l'eau de l'installation un antigel, tel que du glycol qui est un produit toxique et cancérigène.The time of release of water is immediate, which is particularly advantageous. In contrast, "underwater" systems are not suitable for sites with frost risks. Indeed, in case of frost, the water can not flow. In addition, the gel can cause damage to the piping of the installation (deformation or burst pipes). In some cases, the installation is then put out of water. In other cases, the site to be protected is heated to avoid any risk of frost. For sites to protect with a relatively large area, energy consumption, and therefore the heating bill, can be considerable, even prohibitive. Another way to fight against freezing is to add an antifreeze to the water of the installation, such as glycol, which is a toxic and carcinogenic product.

Dans les systèmes « sous air », l'ensemble de l'installation est hors d'eau. L'ensemble de la tuyauterie de l'installation est maintenue sous pression. Lorsque les fusibles éclatent, la pression d'air est libérée par le ou les sprinklers en question et l'eau, également sous pression, tend à « pousser » l'air hors de l'installation jusqu'à arriver à l'orifice ou aux orifices libérés de façon à s'échapper par ceux-ci.In "under air" systems, the whole installation is out of water. All the piping of the installation is kept under pressure. When the fuses burst, the air pressure is released by the sprinkler (s) in question and the water, also under pressure, tends to "push" the air out of the installation until it reaches the orifice or to the orifices released so as to escape through them.

Avec un tel système, l'eau peut dans certains cas mettre jusqu'à 60 secondes pour parvenir au sprinkler dont le fusible est éclaté, ce qui est certes conforme à la norme en vigueur mais qui peut s'avérer trop long vis-à-vis de certains départs d'incendie.With such a system, the water can in some cases take up to 60 seconds to reach the sprinkler whose fuse is burst, which is certainly in line with the standard in force but may be too long vis-à-vis vis of some fire starts.

En outre, les systèmes « sous air » ne s'affranchissent pas totalement des problèmes liés au gel. En effet, de la condensation peut se créer dans les tuyauteries d'une installation « sous air », ce qui peut nuire à certains composants de l'installation et mettre en échec la protection.In addition, the "under air" systems do not completely overcome the problems related to freezing. Indeed, condensation can occur in the pipes of an installation "under air", which can harm some components of the installation and defeat the protection.

De façon générale, les systèmes « sous eau » et « sous air » présentent les inconvénients suivants :

  • ils sont sujets à l'embouage et, par conséquent, au colmatage ;
  • ils sont sujets à la corrosion, ce qui peut évidemment conduire à une installation hors d'usage en tout ou partie et mettre en échec la protection ;
  • ils peuvent être l'objet de fuites d'eau non visibles ;
  • ils permettent le développement des micro-organismes dans les canalisations de l'installation.
In general, underwater and underwater systems have the following disadvantages:
  • they are subject to sludging and, consequently, clogging;
  • they are subject to corrosion, which can obviously lead to an installation out of order in whole or in part and defeat the protection;
  • they can be the object of non-visible water leaks;
  • they allow the development of micro-organisms in the pipes of the installation.

Il en résulte qu'ils nécessitent, entre autres, des traitements antigel et anticorrosion (impliquant le recours à des produits nocifs).As a result, they require, inter alia, anti-freeze and anti-corrosion treatments (involving the use of harmful products).

Par ailleurs, ils nécessitent des opérations de rinçage après utilisation.Moreover, they require rinsing operations after use.

En outre, ils impliquent des temps de mise en service relativement longs, en fonction de l'étendue de l'installation, qui peuvent aller de une à quatre heures pour les systèmes « sous eau » et de deux heures et plus pour les systèmes « sous air ».In addition, they involve relatively long commissioning times, depending on the extent of the installation, which can range from one to four hours for "underwater" systems and two hours or more for "wet" systems. under the air.

Pour pallier l'ensemble de ces inconvénients, les systèmes « sous vide » ont été conçus. Dans les systèmes « sous vide », on crée un vide dans les canalisations s'étendant entre une vanne générale et l'ensemble des sprinklers. En d'autres termes, toutes les canalisations séparant la vanne des sprinklers sont sous vide.To overcome all these drawbacks, the "vacuum" systems have been designed. In "vacuum" systems, a vacuum is created in the pipes extending between a general valve and the set of sprinklers. In other words, all the pipes separating the valve from the sprinklers are under vacuum.

Dans ces systèmes, le vide constitue une énergie active qui sert de source fonctionnelle à la surveillance des sprinklers. En effet, si un fusible d'un des sprinklers éclate, la pression atmosphérique gagne l'ensemble de l'installation, ce qui provoque le changement d'état d'un actionneur qui, à son tour, ouvre la vanne générale d'arrivé d'eau. Il s'en suit que l'eau envahit rapidement et sans obstacles l'ensemble de l'installation jusqu'aux sprinklers, l'eau s'écoulant par le ou les sprinklers dont le fusible a éclaté. Le vide encore actif dans les réseaux attire rapidement l'eau d'extinction vers les sprinklers dont le fusible a éclaté.In these systems, vacuum is an active energy that serves as a functional source for sprinkler monitoring. Indeed, if a fuse of one of the sprinklers bursts, the atmospheric pressure wins the entire installation, which causes the change of state of an actuator which, in turn, opens the general valve of arrival of water. It follows that the water invades quickly and without obstacles the entire installation to the sprinklers, the water flowing through the sprinkler (s) where the fuse has burst. The still active vacuum in the networks quickly attracts the extinguishing water to the sprinklers whose fuse has burst.

Le temps de déclenchement de l'actionneur est très court, dans la mesure où, lorsqu'un fusible éclate, l'installation « sous vide » engendre immédiatement un phénomène d'aspiration de l'air extérieur à l'installation. Il est à noter que cette aspiration peut être bénéfique, l'effet d'aspiration sur le foyer d'incendie tendant à réduire l'intensité de celui-ci.The tripping time of the actuator is very short, since when a fuse bursts, the "vacuum" installation immediately generates a phenomenon of suction of the air outside the installation. It should be noted that this suction can be beneficial, the suction effect on the fire focus to reduce the intensity of it.

Le temps d'arrivée d'eau au sprinkler dont le fusible a éclaté est inférieur à 60 secondes.The water inlet time of the sprinkler with the fuse blown is less than 60 seconds.

On comprend donc que, du fait de l'absence d'eau ou de condensation dans une installation d'un système « sous vide », on obtient les résultats suivants :

  • pas de corrosion, donc pas d'embouage ni de colmatage ;
  • la garantie d'obtenir la densité d'eau d'extinction requise ;
  • pas de développement de micro-organismes ;
  • pas de fuites d'eau possibles (l'eau étant par défaut absente dans les canalisations de l'installation conduisant aux sprinklers) ;
  • aucune nécessité de traitement antigel ou anticorrosif ;
  • pas de rinçage nécessaire avant mise en service de l'installation.
It is therefore understood that, due to the absence of water or condensation in an installation of a "vacuum" system, the following results are obtained:
  • no corrosion, so no fogging or clogging;
  • the guarantee of obtaining the density of extinguishing water required;
  • no development of micro-organisms;
  • no water leakage possible (water is by default absent in the pipelines of the installation leading to the sprinklers);
  • no need for antifreeze or anticorrosive treatment;
  • no rinsing necessary before putting the plant into operation.

Pour certaines installations, il est nécessaire de prévoir la mise en oeuvre de chandelles sèches, utilisées pour lutter contre un incendie susceptible de se déclarer dans une chambre froide.For some installations, it is necessary to provide for the use of dry candles, used to fight a fire likely to be declared in a cold room.

Ces chandelles sèches assurent la liaison entre une canalisation du réseau de sprinklers « sous vide » et l'intérieur de la chambre froide. Pour cela, les chandelles sèches présentent un corps allongé présentant à l'une de ses extrémités une pièce de raccordement à une tuyauterie et, à l'autre de ses extrémités, un sprinkler du type de celui décrit précédemment.These dry candles provide the link between a pipe of the network of sprinklers "under vacuum" and the interior of the cold room. For this, the dry candles have an elongate body having at one of its ends a connection piece to a pipe and at the other end thereof, a sprinkler of the type described above.

La hauteur du corps allongé est dimensionnée en fonction de l'épaisseur de la paroi calorifuge du plafond de la chambre froide.The height of the elongate body is sized according to the thickness of the heat insulating wall of the ceiling of the cold room.

Bien entendu, cette dimension du corps allongé est telle que le sprinkler porté par l'extrémité inférieure de la chandelle sèche s'étende dans le volume interne de la chambre froide.Of course, this dimension of the elongate body is such that the sprinkler carried by the lower end of the dry candle extends into the internal volume of the cold room.

La conception des chandelles sèches est prévue de telle sorte que, lorsque le réseau de sprinklers est mis en eau, les chandelles sèches dont les fusibles n'ont pas éclaté ne soient pas remplies d'eau. En effet, même après mise sous vide du réseau de sprinklers, de l'eau pourrait stagner dans le corps allongé d'une chandelle et, compte tenu de la température dans la chambre froide, serait amenée à geler. Il en résulterait évidemment que la chandelle serait mise en échec en situation d'incendie à l'intérieur de la chambre froide pour l'une et/ou l'autre des raisons suivantes :

  • la pression atmosphérique ne pourrait s'étendre dans le réseau de sprinklers du fait de la glace présente dans le corps allongé faisant obstacle à la pénétration de l'air ambiant de la chambre froide ;
  • l'eau ne pourrait s'écouler au travers du sprinkler, également du fait de la glace présente dans le corps allongé faisant obstacle en tout ou partie à l'écoulement de l'eau.
The design of the dry candles is designed so that when the sprinkler system is flooded, the dry candles whose fuses did not burst are not filled with water. Indeed, even after evacuation of the sprinkler system, water could stagnate in the elongated body of a candle and, given the temperature in the cold room, would be allowed to freeze. It would obviously result that the candle would be defeated in a fire situation inside the cold room for one or both of the following reasons:
  • the atmospheric pressure could not extend into the sprinkler network because of the ice present in the elongate body obstructing the penetration of the ambient air of the cold room;
  • water could not flow through the sprinkler, also because of the ice in the elongate body obstructing all or part of the flow of water.

Pour éviter cette situation, les chandelles sèches incluent des moyens d'obturation de la liaison, constitués par un premier ajutage, entre la chandelle et la tuyauterie qui la porte.To avoid this situation, the dry candles include closure means of the connection, consisting of a first nozzle, between the candle and the piping that carries it.

Selon le fonctionnement de cette chandelle sèche, si le fusible du sprinkler de la chandelle éclate, l'obturateur au niveau du sprinkler est éjecté, ce qui entraine le déplacement des moyens d'obturation au niveau du premier ajutage, de façon à libérer la communication entre la chandelle et la tuyauterie portant la chandelle.According to the operation of this dry candle, if the fuse sprinkler of the candle bursts, the shutter at the sprinkler is ejected, which causes the displacement of the shutter means at the first nozzle, so as to release the communication between the candle and the pipes carrying the candle.

En revanche, si le fusible du sprinkler de la chandelle n'éclate pas, les moyens d'obturation au niveau du premier ajutage restent en position d'obturation et isolent la chandelle de l'eau présente dans le réseau de sprinklers.On the other hand, if the fuse of the sprinkler of the candle does not burst, the shutter means at the first nozzle remain in the closed position and isolate the candle from the water present in the sprinkler system.

Or, selon la conception des chandelles actuelles et les pratiques de maintenance correspondantes, lorsque le sprinkler d'une chandelle sèche a été déclenché, celle-ci est remplacée dans son intégralité.However, according to the design of the current candles and the corresponding maintenance practices, when the sprinkler of a dry candle has been triggered, it is replaced in its entirety.

Le coup d'une seule chandelle sèche étant relativement important, cette pratique de maintenance s'avère particulièrement onéreuse lorsqu'il s'agit de remplacer toutes les chandelles sèches d'une chambre froide.The blow of a single dry candle being relatively important, this maintenance practice turns out to be particularly expensive when it comes to replacing all the dry candles of a cold room.

Par ailleurs, les sprinklers présents à l'extrémité inférieure des chandelles sèches, comme tous les autre sprinklers d'un réseau « sous vide », comprennent, outre le fusible et l'opercule d'obturation, des moyens d'éjection de l'opercule.Moreover, the sprinklers present at the lower end of the dry candles, like all the other sprinklers of a "vacuum" network, comprise, in addition to the fuse and the sealing cap, means for ejecting the cover.

En effet, comme indiqué précédemment, lorsqu'un fusible éclate, il s'en suit un phénomène d'aspiration de l'air vers l'intérieur de la tuyauterie de l'installation. L'opercule, s'il n'est pas contraint à quitter son emplacement, reste en quelque sorte « collé » sur l'embouchure de l'ajutage du raccord, ce qui ne permet pas alors à l'air de rentrer et empêche par conséquent l'actionneur de se déclencher.Indeed, as indicated above, when a fuse bursts, it follows a phenomenon of suction of air to the inside of the piping of the installation. The lid, if it is not forced to leave its location, remains somehow "stuck" on the mouth of the fitting nozzle, which does not allow the air to return and prevents by therefore the actuator will trip.

Pour éviter cela, des moyens d'éjection sont montés sur chaque sprinkler. Ces moyens d'éjection sont classiquement constitués par un ressort inséré dans une pièce cylindrique montée dans l'ajutage du sprinkler. Une extrémité du ressort est en appui au fond de la pièce cylindrique, tandis que l'autre extrémité de ressort est en appui sur l'obturateur maintenu en position par le fusible. Le ressort est bien entendu à l'état comprimé.To avoid this, ejection means are mounted on each sprinkler. These ejection means are conventionally constituted by a spring inserted in a cylindrical part mounted in the nozzle of the sprinkler. One end of the spring is supported at the bottom of the cylindrical part, while the other end of the spring bears on the shutter held in position by the fuse. The spring is of course in the compressed state.

Avec de tels sprinklers, il a parfois été constaté des situations indésirables.With such sprinklers, it has sometimes been found undesirable situations.

En effet, il a été constaté qu'après éclatement du fusible, l'opercule peut rester dans une position d'obturation partielle de l'ajutage du raccord ou dans une position nuisant à la bonne diffusion de l'eau. En tout état de cause, le ressort, lui, n'est pas éjecté de l'ajutage et reste donc à l'intérieur de celui-ci.Indeed, it was found that after bursting the fuse, the lid may remain in a position of partial closure of the nozzle of the connector or in a position detrimental to the good diffusion of water. In any case, the spring is not ejected from the nozzle and therefore remains inside of it.

Il en résulte que, dans tous les cas de figure, l'ajutage n'est pas totalement dégagé, ce qui fait partiellement obstacle à l'entrée d'air dans le réseau. La conséquence est que la dépression de l'installation est ralentie et, par conséquent, le déclenchement de l'actionneur est retardé, pouvant atteindre 30 à 40 secondes. Des chandelles sèches connues sont décrites par exemple dans les documents US 2009/211772 A et KR10-2012-0098205 A . L'invention a notamment pour objectif de pallier les inconvénients de l'art antérieur.As a result, in all cases, the nozzle is not completely clear, which partially prevents the entry of air into the network. The consequence is that the vacuum of the installation is slowed down and, consequently, the triggering of the actuator is delayed, which can reach 30 to 40 seconds. Known dry candles are described for example in documents US 2009/211772 A and KR10-2012-0098205 A . The invention particularly aims to overcome the disadvantages of the prior art.

Plus précisément, l'invention a pour objectif de proposer une chandelle sèche dont la conception permet de limiter les coûts de remplacement en cas de déclenchement de celle-ci.More specifically, the invention aims to provide a dry candle whose design can limit replacement costs in case of triggering thereof.

L'invention a également pour objectif de fournir une telle chandelle sèche dont la maintenance puisse être exécutée rapidement et aisément.The invention also aims to provide such a dry candle whose maintenance can be performed quickly and easily.

L'invention a également pour objectif de fournir une telle chandelle sèche qui assure, au niveau du sprinkler, une libération totale de l'ajutage du raccord en cas d'éclatement du fusible.The invention also aims to provide such a dry candle which ensures, at the sprinkler, a total release of the nozzle of the fitting in case of bursting fuse.

En ce sens, l'invention a pour objectif de garantir en toutes circonstances un temps de déclenchement minimal de l'actionneur d'un système « sous vide ».In this sense, the object of the invention is to guarantee in all circumstances a minimum tripping time of the actuator of a "vacuum" system.

Ces objectifs, ainsi que d'autres qui apparaîtront par la suite, sont atteints grâce à l'invention qui a pour objet une chandelle sèche destinée à être montée dans un installation de protection contre les incendies, du type comprenant un réseau de sprinklers sous vide, la chandelle comprenant un corps allongé présentant à l'une de ses extrémités une pièce de raccordement à une tuyauterie, incluant un premier ajutage susceptible d'assurer la liaison entre la chandelle et la tuyauterie, la chandelle incluant des moyens d'obturation du premier ajutage, l'autre extrémité portant un sprinkler comprenant :

  • un raccord de fixation, par l'intermédiaire duquel le sprinkler est couplé au corps de la chandelle, le raccord de fixation présentant un deuxième ajutage ;
  • un fusible ;
  • un opercule d'obturation du deuxième ajutage, maintenu en position d'obturation par le fusible ;
  • des moyens d'éjection de l'opercule d'obturation,
caractérisée en ce qu'elle comprend des moyens de liaison entre les moyens d'obturation du premier ajutage et l'opercule d'obturation du deuxième ajutage, lesdits moyens étant mobiles de façon à faire coïncider la position d'obturation de l'opercule d'obturation avec la position d'obturation des moyens d'obturation du premier ajutage, le raccord de fixation du sprinkler est solidarisé à un tronçon d'extrémité du corps présentant des moyens d'évacuation d'eau comprenant un conduit incliné, remontant vers l'extérieur du tronçon d'extrémité, et incluant une bille apte à permettre l'écoulement d'eau en position basse dans le conduit incliné et à interdire l'écoulement d'eau en position haute dans le conduit incliné.These objectives, as well as others which will appear later, are achieved thanks to the invention which relates to a dry candle intended to be mounted in a fire protection installation, of the type comprising a network of vacuum sprinklers. , the candle comprising an elongate body having at one of its ends a connection piece to a pipe, including a first nozzle capable of connecting the candle to the pipe, the candle including means for sealing the first nozzle, the other end carrying a sprinkler comprising:
  • a fastener, through which the sprinkler is coupled to the body of the candle, the fastener having a second nozzle;
  • a fuse;
  • a sealing cap of the second nozzle, held in the closed position by the fuse;
  • means for ejecting the sealing cap,
characterized in that it comprises connecting means between the closure means of the first nozzle and the sealing cap of the second nozzle, said means being movable so as to coincide the closed position of the seal shutter with the closed position of the closure means of the first nozzle, the sprinkler attachment connection is secured to an end portion of the body having means for discharging water comprising an inclined pipe, going back to the outside the end section, and including a ball adapted to allow the water flow in the lower position in the inclined conduit and to prohibit the flow of water in the upper position in the inclined conduit.

Ainsi, avec une chandelle selon l'invention, quand celle-ci doit être remise en service après que le fusible du sprinkler de la chandelle ait éclaté, il n'est pas nécessaire, contrairement à l'art antérieur, de remplacer l'intégralité de la chandelle.Thus, with a candle according to the invention, when it must be put back into service after the sprinkler fuse of the candle has burst, it is not necessary, contrary to the prior art, to replace the entire candle.

En effet, avec une chandelle selon l'invention, il est possible de ne remplacer que le sprinkler, voire seulement le fusible du sprinkler.Indeed, with a candle according to the invention, it is possible to replace only the sprinkler, or only the fuse of the sprinkler.

Comme cela va apparaître plus clairement par la suite, la remise en place d'un sprinkler avec un nouveau fusible va agir sur les moyens de liaison entre les moyens d'obturation du premier ajutage et l'opercule d'obturation du deuxième ajutage, de telle sorte que les moyens d'obturation du premier ajutage soient automatiquement en service une fois le nouveau sprinkler installé.As will become clearer later, the refitting of a sprinkler with a new fuse will act on the connecting means between the closure means of the first nozzle and the sealing cap of the second nozzle, of so that the shutter means of the first nozzle are automatically in use once the new sprinkler installed.

On comprend dès lors qu'en changeant uniquement les sprinklers, voire uniquement les fusibles des sprinklers, on peut obtenir des gains relativement importants sur les coûts de maintenance.It is understandable therefore that by changing only sprinklers, or even only sprinkler fuses, we can obtain relatively large gains on maintenance costs.

En outre, avec une chandelle selon l'invention, les opérations de maintenance peuvent être exécutées de façon aisée et très rapide.In addition, with a candle according to the invention, the maintenance operations can be performed easily and very quickly.

De plus, les moyens d'évacuation d'eau sont prévus, comme cela va être expliqué plus en détails par la suite, pour évacuer l'eau introduite dans le corps allongé de la chandelle sèche en raison de légères fuites.In addition, the means for discharging water are provided, as will be explained in more detail later, to evacuate the water introduced into the elongated body of the dry candle due to slight leaks.

En outre, grâce à leur structure, les moyens d'évacuation d'eau sont simples et agissent efficacement et naturellement en fonction de la quantité et de la pression d'eau dans la chandelle sèche, ceci de la façon suivante :

  • en l'absence de pression, la bille restera en bas du conduit incliné sous le simple effet de la gravité et l'eau présente dans le corps allongé, à priori sous forme de gouttelettes (dues à de légères fuites), va s'écouler par ce conduit, évitant qu'elle ne s'accumule puis ne gèle à l'intérieur de la chandelle ;
  • en cas de présence d'eau en quantité et en pression dans la chandelle, l'eau repousse la bille vers le haut du conduit, obturant celui-ci, et favorisant l'écoulement exclusif de l'eau par le sprinkler dont le fusible aura éclaté.
In addition, thanks to their structure, the means of water evacuation are simple and act efficiently and naturally depending on the quantity and the water pressure in the dry candle, as follows:
  • in the absence of pressure, the ball will remain at the bottom of the inclined pipe under the simple effect of gravity and the water present in the elongated body, a priori in the form of droplets (due to slight leaks), will flow by this conduit, avoiding that it accumulates and then freezes inside the candle;
  • if water is present in quantity and pressure in the candle, the water pushes the ball towards the top of the pipe, closing it, and promoting the exclusive flow of water by the sprinkler whose fuse will have bursts.

Selon une solution avantageuse, les moyens de liaison comprennent un axe, le corps de la chandelle incluant des moyens de guidage en translation longitudinale dudit axe.According to an advantageous solution, the connecting means comprise an axis, the body of the candle including guide means in longitudinal translation of said axis.

Dans ce cas, les moyens d'obturation du premier ajutage sont avantageusement solidarisés à une extrémité dudit axe.In this case, the closure means of the first nozzle are advantageously secured to one end of said axis.

En outre, les moyens de guidage comprennent préférentiellement au moins une pièce intermédiaire entre deux tronçons du corps de la chandelle, la pièce étant ajourée et présentant une coulisse centrale à l'intérieur de laquelle l'axe est guidé en translation.In addition, the guide means preferably comprise at least one intermediate piece between two sections of the body of the candle, the part being perforated and having a central slide inside which the axis is guided in translation.

Ainsi, on assure le guidage en translation de l'axe de liaison, ceci tout en réalisant une chandelle sèche constituée par l'assemblage de pièces détachées simples de conception et peu coûteuses à réaliser.Thus, it provides guidance in translation of the connecting axis, this while achieving a dry candle constituted by the assembly of simple spare parts design and inexpensive to achieve.

Préférentiellement, au moins un ressort est monté entre un moyen d'arrêt sur l'axe et la pièce intermédiaire, le montage du ressort étant réalisé de telle sorte que le ressort est en compression dans les positions d'obturation de l'opercule d'obturation et des moyens d'obturation du premier ajutage.Preferably, at least one spring is mounted between a stop means on the axis and the intermediate piece, the mounting of the spring being made so that the spring is in compression in the closed positions of the seal. shutter and means for sealing the first nozzle.

Un tel montage va contribuer à la réactivité de la chandelle sèche en cas de déclenchement de celle-ci du fait de l'éclatement du fusible de son sprinkler.Such an assembly will contribute to the responsiveness of the dry candle in case of triggering thereof due to the bursting of the fuse of his sprinkler.

De plus, l'axe porte avantageusement une butée destinée à venir en appui contre une pièce intermédiaire et à retenir l'axe quand l'opercule d'obturation et les moyens d'obturation du premier moyen d'ajutage ne sont pas en position d'obturation.In addition, the axis advantageously carries a stop intended to abut against an intermediate piece and to retain the axis when the closure cap and the closure means of the first nozzle means are not in position d shutter.

Selon un mode de réalisation particulier, ledit tronçon d'extrémité est relié à un autre tronçon du corps par une pièce intermédiaire ajourée et présentant une coulisse centrale à l'intérieur de laquelle l'axe est guidé en translation. On peut de cette façon obtenir deux zones de guidage différentes de l'axe de liaison à l'intérieur du corps allongé de la chandelle sèche.According to a particular embodiment, said end section is connected to another portion of the body by a perforated intermediate piece and having a central slide inside which the axis is guided in translation. In this way two different guiding zones of the connecting axis can be obtained inside the elongated body of the dry candle.

Selon encore une autre caractéristique avantageuse de l'invention, les moyens d'éjection de l'opercule d'obturation du sprinkler sont montés hors du deuxième ajutage et agissent en traction sur l'opercule d'obturation.According to yet another advantageous characteristic of the invention, the means for ejecting the shutter of the sprinkler are mounted outside the second nozzle and act in traction on the shutter.

Ainsi, grâce à cette caractéristique, après éclatement du fusible d'un sprinkler d'une chandelle sèche selon l'invention, on obtient la libération totale de l'ajutage du sprinkler en question.Thus, thanks to this characteristic, after bursting the fuse of a sprinkler of a dry candle according to the invention, we obtain the total release of the nozzle of the sprinkler in question.

En effet, deux caractéristiques de l'invention se combinent pour obtenir ce résultat particulièrement avantageux, à savoir :

  • le fait que le ressort est monté hors de l'ajutage, et n'est donc pas dans une position de nature à freiner l'admission d'air dans la tuyauterie de l'installation ;
  • le ressort agit par traction sur l'opercule, ce qui assure son extraction et son éjection à partir du sprinkler.
Indeed, two features of the invention combine to obtain this particularly advantageous result, namely:
  • the fact that the spring is mounted outside the nozzle, and is therefore not in a position likely to slow down the admission of air into the piping of the installation;
  • the spring acts by pulling on the lid, which ensures its extraction and ejection from the sprinkler.

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation préférentiel de l'invention, donné à titre de simple exemple illustratif et non limitatif, et des dessins annexés parmi lesquels :

  • la figure 1 est une vue schématique en coupe longitudinale d'une chandelle sèche selon l'invention, dans sa configuration déclenchée ;
  • la figure 2 est une vue schématique en coupe longitudinale d'une chandelle sèche selon l'invention, dans sa configuration de service ;
  • les figures 3 et 4 représentent schématiquement un sprinkler selon un premier mode de réalisation de l'invention, respectivement vu en coupe et vu de côté ;
  • les figures 5 à 7 représentent schématiquement un ressort de torsion destiné à équiper un sprinkler d'une chandelle sèche selon l'invention, respectivement vu de dessus à l'état détendu, vu de dessus à l'état armé et vu de côté.
Other characteristics and advantages of the invention will appear more clearly on reading the following description of a preferred embodiment of the invention, given by way of a simple illustrative and nonlimiting example, and the appended drawings among which:
  • the figure 1 is a schematic longitudinal sectional view of a dry candle according to the invention, in its triggered configuration;
  • the figure 2 is a schematic longitudinal sectional view of a dry candle according to the invention, in its service configuration;
  • the Figures 3 and 4 schematically represent a sprinkler according to a first embodiment of the invention, respectively seen in section and seen from the side;
  • the Figures 5 to 7 schematically represent a torsion spring intended to equip a sprinkler with a dry candle according to the invention, respectively seen from above in the relaxed state, seen from above in the armed state and viewed from the side.

Tel qu'illustré par les figures 1 et 2, une chandelle sèche selon l'invention comprend un corps 5 présentant :

  • une pièce de raccordement 50 à l'une de ses extrémités ;
  • un sprinkler à l'autre de ses extrémités.
As illustrated by Figures 1 and 2 , a dry candle according to the invention comprises a body 5 having:
  • a connecting piece 50 at one of its ends;
  • a sprinkler at the other end.

La pièce de raccordement 50 est destinée à permettre le raccordement de la chandelle sèche à une tuyauterie, et inclut pour ce faire un premier ajutage 51 susceptible d'assurer la liaison entre la chandelle et la tuyauterie. La chandelle sèche inclut en outre des moyens d'obturation 60 de ce premier ajutage 51, ces moyens d'obturation étant mobiles entre une position d'obturation de l'ajutage 51 (figure 2) et une position de libération de l'ajutage 51 (figure 1).The connecting piece 50 is intended to allow the connection of the dry candle to a pipe, and includes for this purpose a first nozzle 51 capable of ensuring the connection between the candle and the pipe. The dry candle also includes means 60 for closing off said first nozzle 51, these shut-off means being movable between a closed position of the nozzle 51 (FIGS. figure 2 ) and a release position of the nozzle 51 ( figure 1 ).

Le sprinkler porté par la chandelle sèche selon l'invention est du type comprenant :

  • un raccord de fixation 1, présentant un filetage extérieur permettant de visser celui-ci sur une tuyauterie présentant un filetage complémentaire, en vue de relier le sprinkler à la tuyauterie, le raccord présentant un deuxième ajutage 10 destiné à communiquer avec l'intérieur de la tuyauterie ;
  • un fusible 2, constitué en pratique par une ampoule renfermant un liquide et une bulle d'air prévue, selon la technique classique des fusibles utilisés sur les sprinkler, pour se dilater et provoquer l'éclatement de l'ampoule si la température à laquelle le fusible est soumis dépasse un seuil prédéterminé ;
  • un opercule d'obturation 3 du deuxième ajutage 10 ;
  • un déflecteur 12 fixé sur un étrier 13 faisant corps avec le raccord 1 du sprinkler.
The sprinkler carried by the dry candle according to the invention is of the type comprising:
  • a fastener 1, having an external thread for screwing it on a pipe with a complementary thread, to connect the sprinkler to the pipe, the connection having a second nozzle 10 for communicating with the interior of the piping;
  • a fuse 2, consisting in practice of a bulb containing a liquid and a planned air bubble, according to the conventional technique of fuses used on sprinklers, to expand and cause the bursting of the bulb if the temperature at which the fuse is subject exceeds a predetermined threshold;
  • a sealing cap 3 of the second nozzle 10;
  • a deflector 12 fixed on a stirrup 13 integral with the connector 1 of the sprinkler.

Le fusible 2 appuie, par l'une de ses extrémités, sur l'opercule 3 de façon à la maintenir dans sa position d'obturation du deuxième ajutage, l'autre extrémité du fusible étant en appui sur un ergot 20 solidaire de l'étrier et, en l'occurrence, du déflecteur 12 (l'ergot 20 étant en pratique aussi un moyen de fixation par vissage du déflecteur sur l'étrier).The fuse 2 presses, at one of its ends, on the cap 3 so as to maintain it in its closed position of the second nozzle, the other end of the fuse resting on a lug 20 integral with the stirrup and, in this case, the deflector 12 (the pin 20 is in practice also a screw fixing means of the deflector on the stirrup).

Dans la position d'attente d'une chandelle tel qu'illustré par la figure 2, le fusible 2 appuie, par l'une de ses extrémités, sur l'opercule 3 de façon à le maintenir dans sa position d'obturation du deuxième ajutage 10, l'autre extrémité du fusible étant en appui sur un ergot 20 solidaire de l'étrier et, en l'occurrence, du déflecteur 12 (l'ergot 20 étant en pratique aussi un moyen de fixation par vissage du déflecteur sur l'étrier).In the waiting position of a candle as illustrated by the figure 2 the fuse 2 presses, at one of its ends, on the cap 3 so as to maintain it in its closed position of the second nozzle 10, the other end of the fuse resting on a lug 20 secured to the yoke and, in this case, the deflector 12 (the lug 20 is in practice also a fastening means by screwing the deflector on the caliper).

Selon le principe de l'invention, la chandelle sèche comprend des moyens de liaison 6 entre les moyens d'obturation 60 du premier ajutage 51 d'une part, et d'autre part, l'opercule d'obturation 3 du deuxième ajutage 10, ces moyens de liaison étant mobiles de façon à faire coïncider la position d'obturation de l'opercule 3 avec la position d'obturation des moyens d'obturation 60 du premier ajutage 51.According to the principle of the invention, the dry candle comprises connecting means 6 between the closure means 60 of the first nozzle 51 on the one hand, and on the other hand, the sealing cap 3 of the second nozzle 10 , these connecting means being movable so as to make the closure position of the lid 3 coincide with the closed position of the closure means 60 of the first nozzle 51.

Selon le présent mode de réalisation, les moyens de liaison 6 comprennent un axe s'étendant à l'intérieur du corps allongé de la chandelle, et sur l'extrémité duquel sont solidarisés les moyens d'obturation 60 du premier ajutage 51.According to the present embodiment, the connecting means 6 comprise an axis extending inside the elongated body of the candle, and on the end of which are secured the closure means 60 of the first nozzle 51.

L'extrémité de l'axe constituant les moyens de liaison et pourvu d'un filetage, et les moyens d'obturation 60 sont constitués par une tête présentant un alésage, de telle sorte que la tête des moyens d'obturation est vissée à l'extrémité correspondante de l'axe.The end of the axis constituting the connecting means and provided with a thread, and the closure means 60 are constituted by a head having a bore, so that the head of the closure means is screwed to the corresponding end of the axis.

A son autre extrémité, l'axe présente une coupelle 61 destinée à venir en appui, tel qu'illustré par la figure 2, contre le culot 30 de l'obturateur 3.At its other end, the axis has a cup 61 intended to bear, as illustrated by the figure 2 against the base 30 of the shutter 3.

A l'intérieur du corps allongé 5, l'axe des moyens de liaison est guidé en translation longitudinale, ceci à l'aide de moyens de guidage comprenant, tel que cela apparaît sur les figures 1 et 2, deux pièces intermédiaires 52, 53. Chacune de ces pièces intermédiaires est ajourée à l'intérieur du corps de la chandelle, et présente une branche diamétrale 520, 530 présentant en son milieu une coulisse 521, 531 à l'intérieur de laquelle l'axe des moyens de liaison 6 est guidé en translation.Inside the elongated body 5, the axis of the connecting means is guided in longitudinal translation, this by means of guiding means comprising, as it appears on the Figures 1 and 2 , two intermediate pieces 52, 53. Each of these intermediate pieces is perforated inside the body of the candle, and has a diametrical branch 520, 530 having in its middle a slide 521, 531 inside which the axis of the connecting means 6 is guided in translation.

On note que le corps allongé 5 de la chandelle est constitué par l'assemblage des pièces suivantes :

  • deux tronçons tubulaires 54, 55 réunis par vissage à l'aide d'une des pièces intermédiaires 52 sensiblement à mi-hauteur du corps allongé ;
  • la pièce de raccordement 50, vissée à l'extrémité du tronçon 54 ;
  • la pièce intermédiaire 53, réunissant le tronçon 55 avec un tronçon d'extrémité 56 formant également un moyen de liaison avec le raccord de fixation 1 du sprinkler.
It is noted that the elongated body 5 of the candle is constituted by the assembly of the following parts:
  • two tubular sections 54, 55 joined by screwing with one of the intermediate parts 52 substantially halfway up the elongated body;
  • the connecting piece 50, screwed to the end of the section 54;
  • the intermediate piece 53, joining the section 55 with an end portion 56 also forming a connecting means with the attachment 1 of the sprinkler.

Tel que cela apparaît sur les figures 1 et 2, l'axe des moyens de liaison présente un moyen d'arrêt 62 prévu pour monter un ressort 7 en compression entre le moyen d'arrêt 62 et la pièce intermédiaire 52. Le ressort est en compression dans la configuration de service de la chandelle, c'est à dire lorsque celle-ci se présente avec l'opercule et les moyens d'obturation du premier ajutage tous deux en position d'obturation tel qu'illustré par la figure 2. Ainsi, lorsque le fusible du sprinkler éclate, le ressort 7 tend à repousser l'axe des moyens de liaison vers le bas, jusqu'à sa position détendue tel qu'illustré par la figure 1, ce qui provoque le déplacement des moyens d'obturation 60 du premier ajutage 51, de façon à libérer celui-ci et à mettre en communication l'intérieur de la chandelle avec la tuyauterie (non représentée) du réseau de sprinklers.As it appears on the Figures 1 and 2 , the axis of the connecting means has a stop means 62 provided for mounting a spring 7 in compression between the stop means 62 and the intermediate piece 52. The spring is in compression in the service configuration of the candle, that is to say when it is presented with the lid and the closure means of the first nozzle both in the closed position as illustrated by the figure 2 . Thus, when the fuse sprinkler bursts, the spring 7 tends to push the axis of the connecting means down to its relaxed position as illustrated by the figure 1 , which causes the displacement of the shutter means 60 of the first nozzle 51, so as to release the latter and to communicate the interior of the candle with the piping (not shown) of the sprinkler system.

De plus, l'axe des moyens de liaison porte une butée 63 destinée à venir en appui contre une pièce intermédiaire, en l'occurrence la pièce intermédiaire 53, ceci pour retenir l'axe quand l'opercule 3 et les moyens d'obturation 60 ne sont pas en position d'obturation (figure 1).In addition, the axis of the connecting means carries a stop 63 intended to bear against an intermediate piece, in this case the intermediate piece 53, to retain the axis when the lid 3 and the closure means 60 are not in the closed position ( figure 1 ).

Par ailleurs, le tronçon d'extrémité 56 présente des moyens d'évacuation d'eau comprenant :

  • un conduit incliné 560, s'étendant de façon inclinée en remontant vers l'extérieur du tronçon d'extrémité ;
  • une bille 561 disposée dans le conduit incliné ;
  • un bouchon 562, vissé sur le conduit incliné 560, du côté externe du tronçon d'extrémité.
Furthermore, the end section 56 has water evacuation means comprising:
  • an inclined duct 560 extending inclined upwardly outwardly of the end section;
  • a ball 561 disposed in the inclined duct;
  • a cap 562, screwed on the inclined duct 560, on the outer side of the end section.

Le bouchon 562 présente lui-même une cavité communicant avec le conduit 560, et s'étendant dans la continuité du conduit 560 avec la même inclinaison.The plug 562 itself has a cavity communicating with the conduit 560, and extending in the continuity of the conduit 560 with the same inclination.

Du côté interne du tronçon d'extrémité, le bouchon 562 présente une grille de retenue de la bille, au travers de laquelle de l'eau peut s'écouler. La tête du bouchon 562 est traversée par un orifice permettant d'évacuer l'eau vers l'extérieur du tronçon d'extrémité.On the inner side of the end section, plug 562 has a ball retaining grid through which water can flow. The plug head 562 is traversed by an orifice for discharging the water to the outside of the end section.

Ainsi, en l'absence de pression, la bille est en bas de la cavité du bouchon (la bille présentant un diamètre qui n'obstrue pas le passage de l'eau en position basse dans la cavité du bouchon).Thus, in the absence of pressure, the ball is at the bottom of the plug cavity (the ball having a diameter that does not obstruct the passage of water in the lower position in the plug cavity).

De plus, le système des moyens d'évacuation selon l'invention est avantageux en cas de légères fuites entre la chandelle et le conduit auquel elle est reliée. En effet, en présence de légères fuites (qui ne vont pas déclencher l'installation qui est prévue pour rétablir le vide en cas de fuites inférieures à un niveau prédéterminé), la chandelle va permettre, de par la position basse de la bille autorisant un passage d'air à l'extrémité extérieure du conduit incliné, une aspiration tendant à évacuer les gouttelettes d'eau éventuellement présentes dans la chandelle.In addition, the system of the evacuation means according to the invention is advantageous in case of slight leaks between the candle and the conduit to which it is connected. Indeed, in the presence of slight leaks (which will not trigger the installation that is intended to restore the vacuum in case of leaks below a predetermined level), the candle will allow, from the low position of the ball allowing a air passage to the outer end of the inclined pipe, an aspiration tending to evacuate the water droplets that may be present in the candle.

En revanche, en présence de pression, la bille remonte contre la tête du bouchon, et vient se plaquer contre l'orifice traversant la tête du bouchon de façon à obstruer celui-ci et à interdire l'écoulement d'eau.In contrast, in the presence of pressure, the ball rises against the head of the cap, and is pressed against the orifice through the head of the plug so as to obstruct it and to prohibit the flow of water.

Selon une autre caractéristique de l'invention, le sprinkler comprend des moyens d'éjection montés hors de l'ajutage 10 et agissant en traction sur l'opercule 3. Bien entendu, tant que le fusible 2 est en place, celui-ci exerce une force supérieure à l'effort de traction des moyens d'éjection.According to another characteristic of the invention, the sprinkler comprises ejection means mounted outside the nozzle 10 and acting in traction on the lid 3. Of course, as long as the fuse 2 is in place, it exerts a force greater than the tensile force of the ejection means.

Selon le présent mode de réalisation, les moyens d'éjection sont constitués par un ressort, et plus précisément par un ressort de torsion 4, tel qu'illustré par les figures 5 à 7.According to the present embodiment, the ejection means are constituted by a spring, and more specifically by a torsion spring 4, as illustrated by the Figures 5 to 7 .

Tel qu'illustré par ces figures, le ressort 4 comprend :

  • un enroulement 40, d'une ou de plusieurs spires ;
  • une première branche 41 s'étendant à partir de l'enroulement 40, et destinée à coopérer avec l'opercule ;
  • une deuxième branche s'étendant à partir de l'enroulement 40, et destinée à être retenue sur le sprinkler.
As illustrated by these figures, the spring 4 comprises:
  • a winding 40, of one or more turns;
  • a first branch 41 extending from the winding 40, and intended to cooperate with the lid;
  • a second branch extending from the winding 40, and intended to be retained on the sprinkler.

A l'état détendu, le ressort 4 présente une configuration dans laquelle les branches 41 et 42 sont écartées l'une de l'autre, tel qu'illustré par la figure 5, tandis que, à l'état armé, les deux branches 41 et 42 sont rapprochées l'une de l'autre, tel qu'illustré par la figure 6. A l'état armé, selon le principe de fonctionnement d'un ressort de torsion, les branches 41 et 42 tendent à exercer un effort sur les éléments qui les retiennent dans cette position, pour retourner dans leurs positions respectives correspondant à l'état détendu, tel qu'illustré par la figure 5 dans l'état détendu.In the relaxed state, the spring 4 has a configuration in which the branches 41 and 42 are spaced from each other, as illustrated by the figure 5 while, in the armed state, the two limbs 41 and 42 are brought closer to one another, as illustrated by the figure 6 . In the armed state, according to the operating principle of a torsion spring, the branches 41 and 42 tend to exert a force on the elements that hold them in this position, to return to their respective positions corresponding to the relaxed state as illustrated by figure 5 in the relaxed state.

Un tel ressort est donc destiné à coopérer par l'une de ses branches (en l'occurrence la branche 41) avec l'opercule en vue d'éjecter celui-ci du sprinkler après éclatement du fusible 2.Such a spring is thus intended to cooperate by one of its branches (in this case the branch 41) with the lid to eject it from the sprinkler after bursting of the fuse 2.

Selon le présent mode de réalisation, l'opercule 3 présente une collerette 31 s'étendant hors du deuxième ajutage 10 et présentant une forme évasée.According to the present embodiment, the lid 3 has a flange 31 extending out of the second nozzle 10 and having a flared shape.

L'opercule 3 est maintenu en appui contre une rondelle 11 montée à l'extrémité de l'ajutage 10. La collerette 31 évasée de l'opercule ménage avec la rondelle 11 un espace 110.The lid 3 is held in abutment against a washer 11 mounted at the end of the nozzle 10. The flared flange 31 of the seal with the washer 11 a space 110.

Le ressort 4 est monté sur le sprinkler de telle sorte que l'une de ses branches (en l'occurrence la branche 41) vienne se placer dans l'espace 110, c'est à dire entre la collerette 31 évasée et la rondelle 11 du sprinkler. Plus précisément, l'espace 110 entre la collerette 31 et la rondelle 11 est prévu de telle sorte que la branche correspondante du ressort est coincée dans cet espace une fois le fusible installé. Le ressort est donc maintenu en toute sécurité en position d'attente.The spring 4 is mounted on the sprinkler so that one of its branches (in this case the branch 41) comes to be placed in the space 110, that is to say between the flange 31 flared and the washer 11 sprinkler. More specifically, the space 110 between the flange 31 and the washer 11 is provided so that the corresponding branch of the spring is stuck in this space once the fuse installed. The spring is thus safely kept in the waiting position.

De plus, tel qu'illustré par les figures 5 et 6, la branche 41 présente une forme incurvée prévue pour épouser la forme de la collerette, celle-ci présentant une section de forme circulaire. A ce titre, on précise que la rondelle 11 présente un passage de forme circulaire et que le culot 30 de l'opercule 3 est introduit dans le passage de la rondelle, s'étendant donc à l'intérieur du deuxième ajutage 10, jusqu'à ce que la rondelle de forme évasée, et plus précisément tronconique, vienne en appui sur les rebords du passage de la rondelle, en obturant celui-ci.Moreover, as illustrated by the Figures 5 and 6 , the branch 41 has a curved shape intended to match the shape of the collar, the latter having a circular section. As such, it is specified that the washer 11 has a passage of circular shape and that the cap 30 of the cap 3 is introduced into the passage of the washer, thus extending inside the second nozzle 10, until that the washer of flared shape, and more precisely frustoconical, comes to bear on the edges of the passage of the washer, closing it.

La branche 41 du ressort 4 est donc insérée dans l'espace 110 entre la collerette 31 et la rondelle 11, tandis que l'autre branche 42 du ressort 4 est maintenue dans un moyen de retenue présent sur le raccord, positionné de telle sorte que le ressort prenne bien entendu sa configuration armée telle qu'illustré par la figure 6.The branch 41 of the spring 4 is thus inserted into the space 110 between the flange 31 and the washer 11, while the other leg 42 of the spring 4 is held in a retaining means present on the coupling, positioned so that the spring takes of course its armed configuration as illustrated by the figure 6 .

Selon le présent mode de réalisation, ce moyen de retenue prend la forme d'un orifice 130 ménagé à la base de l'étrier 13, et destiné à être traversé par la branche 42 tel qu'illustré par la figure 4.According to the present embodiment, this retaining means takes the form of an orifice 130 formed at the base of the stirrup 13, and intended to be traversed by the branch 42 as illustrated by FIG. figure 4 .

Par ailleurs, selon une caractéristique du ressort 4 de ce mode de réalisation, la branche 42, destinée à être insérée dans l'orifice 130 ménagé à la base de l'étrier, présente deux parties, à savoir :

  • une partie proximale 421, en sortie de l'enroulement ;
  • une partie terminale 420, destinée à être insérée dans l'orifice 130 à la base de l'étrier, et à traverser celui-ci.
Furthermore, according to a characteristic of the spring 4 of this embodiment, the branch 42, intended to be inserted into the orifice 130 formed at the base of the stirrup, has two parts, namely:
  • a proximal portion 421 at the exit of the winding;
  • an end portion 420, intended to be inserted into the hole 130 at the base of the stirrup, and to pass therethrough.

Tel que cela apparaît sur la figure 7, les deux parties forment un coude de telle sorte que la partie terminale soit susceptible de remonter au travers de l'orifice 130 de l'étrier, ceci par rapport à la partie proximale (selon la position de en hauteur de l'enroulement par rapport à l'orifice, on peut également considérer que la partie proximale descend par rapport à la partie distale une fois celle-ci insérée dans l'orifice).As it appears on the figure 7 , the two parts form a bend so that the end portion is able to go up through the orifice 130 of the stirrup, this with respect to the proximal part (according to the position of the winding relative to the at the orifice, it can also be considered that the proximal portion descends relative to the distal portion once it is inserted into the orifice).

Claims (8)

  1. Dry candle intended to be assembled in a protective installation against fires, of the type comprising a network of vacuum sprinklers, the candle comprising an extended body (5) that has, at one of the ends thereof, a part (50) for connecting to pipework, including a first nozzle (51) likely to ensure the connection between the candle and the pipework, the candle including means for blocking (60) the first nozzle (51), the other end holding a sprinkler comprising:
    - a fastening coupling (1), by the intermediary of which the sprinkler is coupled with the candle body, the fastening coupling having a second nozzle (10);
    - a fuse (2);
    - a lid for blocking (3) the second nozzle (10), held in a blocking position by the fuse (2);
    - means for ejecting the blocking lid,
    the dry candle comprising connecting means (6) between the means for blocking (60) the first nozzle (51) and the lid for blocking (3) the second nozzle (10), said connecting means (6) being mobile so as to match the blocking position of the blocking lid (3) with the blocking position of the means for blocking (60) the first nozzle (51), the fastening coupling (1) of the sprinkler being connected to an end section (56) of the body, characterised in that the end section (56) of the body has means for releasing water comprising a tilted pipe (560), rising towards the outside of the end section (56), and including a ball (561) able to enable the water flow in the low position into the tilted pipe (560) and to forbid the water flow in the high position into the tilted pipe.
  2. Dry candle according to claim 1, characterised in that the connecting means (6) comprise an axis, the body (5) of the candle including means for guiding said axis longitudinally forward.
  3. Dry candle according to claim 2, characterised in that the means for blocking (60) the first nozzle (51) are connected to an end of said axis.
  4. Dry candle according to claim 2, characterised in that the guiding means comprise at least one intermediate part (52), (53) between two sections of the body (5) of the candle, the part being perforated and having a central slider (521), (531), inside which the axis is guided forward.
  5. Dry candle according to claim 4, characterised in that at least one spring (7) is assembled between a stopping means (62) on the axis and the intermediate part, the assembly of the spring (7) being carried out such that the spring is compressed in the blocking positions of the blocking lid (3) and the means for blocking (60) the first nozzle (51).
  6. Dry candle according to claim 4, characterised in that the axis supports a stopper intended to support between an intermediate part and to retain the axis when the blocking lid (3) and the means for blocking (60) the first nozzle (51) are not in the blocking position.
  7. Dry candle according to claim 1, characterised in that said end section (56) is connected to another section of the body (5) by an intermediate part (53) that is perforated and that has a central slider (531) inside which the axis is guided forward.
  8. Dry candle according to claim 1, characterised in that the means for ejecting the blocking lid (3) of the sprinkler are assembled outside of the second nozzle (10) and act in tension on the blocking lid (3).
EP14710001.0A 2013-02-21 2014-02-13 Dry drop intended to be mounted in a fireprotection installation of the type comprising a network of vacuum sprinklers Not-in-force EP2958638B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14710001T PL2958638T3 (en) 2013-02-21 2014-02-13 Dry drop intended to be mounted in a fireprotection installation of the type comprising a network of vacuum sprinklers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1351518A FR3002152B1 (en) 2013-02-21 2013-02-21 DRY CANDLE INTENDED TO BE MOUNTED IN A FIRE PROTECTION PLANT COMPRISING A VACUUM SPRINKLERS NETWORK
PCT/FR2014/050284 WO2014128387A2 (en) 2013-02-21 2014-02-13 Dry visor intended to be mounted in a fireprotection installation of the type comprising a network of vacuum sprinklers

Publications (2)

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EP2958638A2 EP2958638A2 (en) 2015-12-30
EP2958638B1 true EP2958638B1 (en) 2018-03-14

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US (1) US9526935B2 (en)
EP (1) EP2958638B1 (en)
AU (1) AU2014220503B2 (en)
CA (1) CA2899173A1 (en)
FR (1) FR3002152B1 (en)
PL (1) PL2958638T3 (en)
RU (1) RU2648218C2 (en)
WO (1) WO2014128387A2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016354580B2 (en) * 2015-11-11 2019-05-09 The Reliable Automatic Sprinkler Co. Inc. Dry sprinkler
FR3085856B1 (en) 2018-09-14 2023-12-01 Exec DRY CANDLE FOR VACUUM FIRE EXTINGUISHING NETWORK
CN114470598B (en) * 2021-12-20 2022-11-29 大连万达集团股份有限公司 Fire pump state monitoring system

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Publication number Priority date Publication date Assignee Title
SU142152A1 (en) * 1961-03-24 1961-11-30 И.М. Цудиков Vacuum sprinkler installation
US5188185A (en) * 1991-06-19 1993-02-23 Grinnell Corporation Dry sprinkler
US7559376B2 (en) * 2004-12-01 2009-07-14 Tyco Fire Products Lp Dry sprinkler with a diverter seal assembly
KR101259098B1 (en) * 2011-02-28 2013-05-14 주식회사 진화이앤씨 Water costs set fire sprinkler frost protection device connections

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AU2014220503B2 (en) 2017-05-25
RU2015139349A (en) 2017-03-29
CA2899173A1 (en) 2014-08-28
WO2014128387A2 (en) 2014-08-28
FR3002152B1 (en) 2015-12-04
RU2648218C2 (en) 2018-03-22
US20150375024A1 (en) 2015-12-31
EP2958638A2 (en) 2015-12-30
FR3002152A1 (en) 2014-08-22
US9526935B2 (en) 2016-12-27
WO2014128387A3 (en) 2014-12-31
PL2958638T3 (en) 2018-08-31
AU2014220503A1 (en) 2015-08-13

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