EP0701841B1 - Installation for fire protection - Google Patents
Installation for fire protection Download PDFInfo
- Publication number
- EP0701841B1 EP0701841B1 EP19950402044 EP95402044A EP0701841B1 EP 0701841 B1 EP0701841 B1 EP 0701841B1 EP 19950402044 EP19950402044 EP 19950402044 EP 95402044 A EP95402044 A EP 95402044A EP 0701841 B1 EP0701841 B1 EP 0701841B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- network
- orifice
- sprinklers
- pressure
- evacuated
- 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.)
- Expired - Lifetime
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- 238000009434 installation Methods 0.000 title claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims 1
- 239000003570 air Substances 0.000 description 5
- 230000006378 damage Effects 0.000 description 2
- 108010036050 human cationic antimicrobial protein 57 Proteins 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- 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
Definitions
- the present invention relates to an installation for protection against a fire of the type comprising a network of sprinklers normally out of water and capable of being supplied with water via a connected control station has a pressurized water source, when the sprinkler network outside water is brought to atmospheric pressure following the opening of said network of sprinklers.
- the role of a sprinkler installation is to detect a focus fire, give an alarm and turn it off when it starts, or at least shut it down contain in such a way that extinction can be carried out by the means of the establishment equipped with said installation or by the fire brigade.
- the network of sprinklers can be permanently underwater.
- the network of sprinklers are permanently kept under compressed air.
- a fall of pressure in the air sprinkler network following the opening of a sprinkler causes a command to the opening of a checkpoint valve, which triggers the alarm and puts the network of sprinklers in communication with the source of pressurized water.
- the disadvantage of these current air installations is that the air contained in the network is at a pressure at least equal to 2 bars. This entails a time relatively high air exhaust after opening the network, which can be prohibitive in certain installations, and the need to provide the installation of a compressor device making it possible to obtain these pressures. This overpressure also causes condensation in the sprinkler network which can again entail the risk of ice formation due to frost.
- US-A-3,759,331 describes an installation in accordance with the preamble of claim 1.
- the checkpoint has a flexible sleeve that is part of the arrival pipe which isolates the sprinkler network from the water source under pressure by pinching the flexible sleeve by means of a backing plate and a rod actuated by a membrane control device, sensitive to the pressure in the sprinkler network.
- the invention differs from this state of the art by the characteristics defined in the characterizing part of claim 1.
- the actuator has a cylinder body having an axial port connected to the network of vacuum sprinklers, and a radial orifice connected to the control chamber, a warhead slidably mounted in said body cylinder and capable of closing together the axial orifice and the radial orifice in a closed position or to port them into a position opening, elastic means interposed between the warhead and the body of cylinder and intended to move the warhead relative to the cylinder body of the closed position to open position, when the pressure in the network of vacuum sprinklers is greater than said minimum pressure predetermined, and an external handle connected to the warhead by a rod control and allowing the displacement of the warhead in the position of closing when the vacuum sprinkler network is depressed as well than manual triggering of the valve opening.
- the actuator cylinder body further comprises a second radial orifice connected to a hydraulic alarm network and capable of being closed by the warhead in the closed position and to communicate with the room in the open position of the warhead.
- These means include elastic means interposed between said orifice and said fuse.
- These elastic means include a spring compression by pressing on a flange provided in the orifice of the sprinkler and on a cap closing the orifice and having a fuse support cradle.
- FIG. 1 there is shown by reference 1 an installation of fire protection which includes a network 2 of vacuum sprinklers 3 capable of being connected to a source of pressurized water 4 via a checkpoint 5.
- the control station 5 comprises in particular a three-way valve 6, of the deluge type, having an inlet duct 7 connected to the water source 4 by a barrier valve 8, an outlet conduit 9 communicating with the network 2 sprinklers 3 through a conduit 10 connected to a vacuum pump 11, and a chamber control top 12 connected to conduit 10 by a second bypass 13 in which an actuator 21 is provided which controls the opening of a valve 14 disposed in the valve 6 and normally closing the inlet duct 7 and the outlet duct 9.
- a first branch 15 connects the inlet duct 7 with the chamber control 12, in order to maintain, in normal position, that is to say in valve 14 closed position, the same pressure in the supply line 7 and the control chamber 12.
- This first branch 15 communicates also with the source of pressurized water 4 through a conduit 16 equipped with a valve 17 for commissioning the valve 6.
- a calibrated orifice 18 is provided in the connection of conduit 16 with the first branch 15.
- a pressure gauge 19 allows to measure the pressure in the first branch 15 and a second pressure gauge 20 makes it possible to measure the water pressure in the second bypass 13 between the actuator 21 and the control chamber 12.
- the second bypass 13 is connected to a hydraulic alarm circuit 22 via the actuator 21 and a non-return valve 23.
- the circuit hydraulic alarm 22 can also be put in communication with the first bypass 15 via a valve 24 which allows test the correct operation of the alarm circuit 22.
- the actuator 21 closes the second bypass 13 and the valve 14 closes the outlet conduit 9.
- the network 2 of sprinklers 3, and conduit 10 are disconnected from the water network under pressure 4 and can be put under vacuum by the vacuum pump 11.
- the circuit hydraulic alarm 22 is also out of water.
- Reference 25 represents an alarm pressure switch, reference 26 a filter and reference 27 a hydraulic alarm.
- FIGS 2 and 3 show in detail the actuator 21.
- This actuator comprises a cylinder body 30 having an orifice axial 31 provided in a connector 31a with a conduit 13b leading to the conduit 10, and two radial holes 32, 33 diametrically opposite and provided in fittings 34, 35 with a conduit 13a leading to the control chamber 12 and the circuit 22.
- the end of the cylinder body 30 opposite the axial orifice 31 is closed by a knurled cover 36.
- a warhead 37 is slidably mounted in the internal cavity 38 of the cylinder body 30.
- the warhead 37 is integral with a rod 39 which passes through the cover 36 and which comprises, at its outer end, a lever 40.
- a tension spring 41 is fixed by one of its ends to the cover 36 and through the other end to the warhead 37.
- a sealing membrane cylindrical 42 is interposed between the warhead 37 and the cover 36.
- the conduits 13a and 13b constitute the second derivation 13 described above.
- the cavity internal 38 between the warhead 37 and the cover 36 is normally under pressure atmospheric.
- the warhead 37 can take two positions, a closed position shown in Figure 2 in which the warhead closes the openings 31, 32 together and 33, and an open or trigger position, in which the warhead 37 is held on the side of the cover 36 by the tension spring 41, the orifices 31, 32 and 33 then communicating with each other.
- FIGS 4 and 5 show a sprinkler 3 intended for installation 1 according to the invention.
- This sprinkler 3 has a connector 50 for fixing it to the piping of network 2, which has, in its center, an orifice 51 normally closed by a fuse 52, a bulb for example, pressing against a bracket 53 integral with the connector 50, and a deflector 54 fixed on the stirrup 53 opposite the orifice 51.
- a flange 55 is mounted which serves to support a first end of a compression spring 56, the other end of which is in support on the underside of a cap 57 which normally closes the orifice 51 and which has, on its external face, a support cradle 58 for the base of the bulb.
- the tightening of the fuse 52 compresses the cap 57 and the spring 56.
- the tension spring 41 of the actuator 21 is calibrated in such a way that when the network 2 of sprinklers is in depression compared to the pressure atmospheric, the depression existing in the duct 13b can maintain the warhead 37 in the closed position, and in such a way that when the pressure in line 13b increases and approaches pressure atmospheric, following a rupture of a fuse 52 of sprinkler, the warhead 37 moves to the open position under the action of the tension spring 41 and pressure differences between orifice 31 and cavity 38.
- the procedure is as follows: On closes the shut-off valve 8, starts the vacuum pump 11 and apply the warhead 37 against the orifice 31 by pressing the lever 40.
- the handle 40 is released and the valve 17 for pressurizing the control chamber 12.
- the balancing in the valve 6 and the closing of the valve 14 will be done by through the safety valve 60 and the calibrated orifice 18.
- the valve 6 is operational. He ... not All that remains is to open the shut-off valve 8.
- the pressure in the network 2 of sprinklers is less than atmospheric pressure by a value of - 0.6 bar about.
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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
La présente invention concerne une installation de protection contre l'incendie du type comportant un réseau de sprinkleurs normalement hors eau et susceptible d'être alimenté en eau par l'intermédiaire d'un poste de contrôle relié a une source d'eau sous pression, lorsque le réseau de sprinkleurs hors eau est mis à la pression atmosphérique par suite de l'ouverture dudit réseau de sprinkleurs.The present invention relates to an installation for protection against a fire of the type comprising a network of sprinklers normally out of water and capable of being supplied with water via a connected control station has a pressurized water source, when the sprinkler network outside water is brought to atmospheric pressure following the opening of said network of sprinklers.
Le rôle d'une installation de sprinkleurs est de déceler un foyer d'incendie, de donner une alarme et de l'éteindre à ses débuts, ou au moins de le contenir de façon que l'extinction puisse être menée à bien par les moyens de l'établissement muni de ladite installation ou par les sapeurs pompiers.The role of a sprinkler installation is to detect a focus fire, give an alarm and turn it off when it starts, or at least shut it down contain in such a way that extinction can be carried out by the means of the establishment equipped with said installation or by the fire brigade.
Dans les locaux où il n'existe aucun risque de gel, le réseau de sprinkleurs peut être en permanence sous eau.In premises where there is no risk of frost, the network of sprinklers can be permanently underwater.
Mais lorsqu'il y a des risques de gel, le réseau de sprinkleurs est hors eau, car le gel d'une installation sous eau peut entraíner la détérioration de l'installation, donc des risques de dégâts des eaux , et surtout un risque de mise hors service de l'installation pendant une durée plus ou moins longue nécessaire à la remise en ordre de l'installation.But when there is a risk of frost, the sprinkler network is out water, because the freezing of an underwater installation can cause deterioration of installation, therefore risks of water damage, and above all a risk of out of service of the installation for a more or less long time necessary when the installation is put back in order.
Dans la plupart des installations hors eau actuels, le réseau de sprinkleurs est maintenu sous air comprimé en permanence. Une chute de pression dans le réseau de sprinkleurs sous air par suite de l'ouverture d'un sprinkleur, en cas de détection d'un incendie, entraíne une commande de l'ouverture d'une soupape du poste de contrôle, ce qui déclenche l'alarme et met le réseau de sprinkleurs en communication avec la source d'eau sous pression. L'inconvénient de ces installations actuelles sous air est que l'air contenu dans le réseau est à une pression au moins égale à 2 bars. Ceci entraíne un temps d'évacuation d'air relativement élevé après l'ouverture du réseau, ce qui peut être rédhibitoire dans certaines installations, et la nécessité de doter l'installation d'un dispositif compresseur permettant d'obtenir ces pressions. Cette surpression provoque également des condensations dans le réseau de sprinkleurs ce qui peut entraíner de nouveau des risques de formation de glaces par suite du gel.In most of the current non-water installations, the network of sprinklers are permanently kept under compressed air. A fall of pressure in the air sprinkler network following the opening of a sprinkler, if a fire is detected, causes a command to the opening of a checkpoint valve, which triggers the alarm and puts the network of sprinklers in communication with the source of pressurized water. The disadvantage of these current air installations is that the air contained in the network is at a pressure at least equal to 2 bars. This entails a time relatively high air exhaust after opening the network, which can be prohibitive in certain installations, and the need to provide the installation of a compressor device making it possible to obtain these pressures. This overpressure also causes condensation in the sprinkler network which can again entail the risk of ice formation due to frost.
Pour pallier ces inconvénients et notamment pour diminuer le temps de
mise en eau du réseau de sprinkleurs en cas d'incendie, il a déjà été proposé de
maintenir normalement le réseau de sprinkleurs sous vide. US-A-3 759 331
décrit une installation conforme au préambule de la revendication 1. Dans ce
document le poste de contrôle comporte un manchon flexible faisant partie de la
conduite d'arrivée qui isole le réseau de sprinkleurs de la source d'eau sous
pression par pincement du manchon flexible au moyen d'une contreplaque et
d'une tige actionnée par un dispositif de commande à membrane, sensible à la
pression régnant dans le réseau de sprinkleurs.To overcome these drawbacks and in particular to reduce the time of
impoundment of the sprinkler network in the event of a fire, it has already been proposed to
maintain the vacuum sprinkler network normally. US-A-3,759,331
describes an installation in accordance with the preamble of
Dans US-A-3 759 331 c'est le vide qui règne dans le réseau de sprinkleurs, qui maintient le clapet fermé.In US-A-3,759,331, there is a vacuum in the network of sprinklers, which keeps the valve closed.
L'invention se différencie de cet état de la technique par les
caractéristiques définies dans la partie caractérisante de la revendication 1.The invention differs from this state of the art by the
characteristics defined in the characterizing part of
L'actuateur comporte un corps de cylindre présentant un orifice axial connecté au réseau de sprinkleurs sous vide, et un orifice radial connecté à la chambre de commande, une ogive montée coulissante dans ledit corps de cylindre et susceptible d'obturer ensemble l'orifice axial et l'orifice radial dans une position de fermeture ou de les mettre en communication dans une position d'ouverture, des moyens élastiques interposés entre l'ogive et le corps de cylindre et destinés à déplacer l'ogive par rapport au corps de cylindre de la position de fermeture à la position d'ouverture, lorsque la pression dans le réseau de sprinkleurs sous vide est supérieure à ladite pression minimum prédéterminée, et une manette extérieure reliée à l'ogive par une tige de commande et permettant le déplacement de l'ogive dans la position de fermeture lors de la mise en dépression du réseau de sprinkleurs sous vide ainsi que le déclenchement manuel de l'ouverture du clapet.The actuator has a cylinder body having an axial port connected to the network of vacuum sprinklers, and a radial orifice connected to the control chamber, a warhead slidably mounted in said body cylinder and capable of closing together the axial orifice and the radial orifice in a closed position or to port them into a position opening, elastic means interposed between the warhead and the body of cylinder and intended to move the warhead relative to the cylinder body of the closed position to open position, when the pressure in the network of vacuum sprinklers is greater than said minimum pressure predetermined, and an external handle connected to the warhead by a rod control and allowing the displacement of the warhead in the position of closing when the vacuum sprinkler network is depressed as well than manual triggering of the valve opening.
Le corps de cylindre de l'actuateur comporte, en outre, un deuxième orifice radial connecté à un réseau d'alarme hydraulique et susceptible d'être obturé par l'ogive en position de fermeture et de communiquer avec la chambre de commande en position d'ouverture de l'ogive.The actuator cylinder body further comprises a second radial orifice connected to a hydraulic alarm network and capable of being closed by the warhead in the closed position and to communicate with the room in the open position of the warhead.
Selon l'invention il est prévu, entre l'orifice de sortie du sprinkleur et le fusible, des moyens pour déboucher positivement ledit orifice en cas de destruction du fusible.According to the invention, provision is made between the outlet orifice of the sprinkler and the fuse, means for positively unblocking said orifice in the event of destruction of the fuse.
Ces moyens comportent des moyens élastiques interposés entre ledit orifice et ledit fusible. Ces moyens élastiques comportent un ressort de compression en appui sur une collerette prévue dans l'orifice du sprinkleur et sur un cabochon obturant l'orifice et présentant un berceau de support du fusible.These means include elastic means interposed between said orifice and said fuse. These elastic means include a spring compression by pressing on a flange provided in the orifice of the sprinkler and on a cap closing the orifice and having a fuse support cradle.
D'autres avantages et caractéristiques de l'invention ressortiront à la
lecture de la description suivante faite à titre d'exemple et en référence aux
dessins annexés dans lesquels :
Sur la figure 1 on a représenté par la référence 1 une installation de
protection contre l'incendie qui comporte un réseau 2 de sprinkleurs 3 sous vide
susceptible d'être relié à une source d'eau sous pression 4 par l'intermédiaire
d'un poste de contrôle 5.In Figure 1 there is shown by
Le poste de contrôle 5 comporte notamment une soupape à trois voies 6,
du type déluge, présentant un conduit d'arrivée 7 relié à la source d'eau 4 par
une vanne de barrage 8, un conduit de sortie 9 communiquant avec le réseau 2
de sprinkleurs 3 par un conduit 10 relié à une pompe à vide 11, et une chambre
supérieure de commande 12 reliée au conduit 10 par une deuxième dérivation
13 dans laquelle est prévu un actuateur 21 qui commande l'ouverture d'un clapet
14 disposé dans la soupape 6 et obturant normalement le conduit d'arrivée 7 et
le conduit de sortie 9. The
Lorsque le clapet 14 est dans la position normale de fermeture, le
conduit d'arrivée 7 est hors communication avec le conduit de sortie 9.When the
Une première dérivation 15 relie le conduit d'arrivée 7 avec la chambre
de commande 12, afin de maintenir, en position normale, c'est-à-dire en
position de fermeture du clapet 14, la même pression dans la conduite d'arrivée
7 et la chambre de commande 12. Cette première dérivation 15 communique
également avec la source d'eau sous pression 4 par un conduit 16 équipé d'une
vanne 17 de mise en service de la soupape 6. Un orifice calibré 18 est prévu au
raccord du conduit 16 avec la première dérivation 15. Un manomètre 19 permet
de mesurer la pression dans la première dérivation 15 et un deuxième
manomètre 20 permet de mesurer la pression d'eau dans la deuxième dérivation
13 entre l'actuateur 21 et la chambre de commande 12.A
La deuxième dérivation 13 est reliée à un circuit d'alarme hydraulique
22 par l'intermédiaire de l'actuateur 21 et d'un clapet antiretour 23. Le circuit
d'alarme hydraulique 22 peut également être mis en communication avec la
première dérivation 15 par l'intermédiaire d'une vanne 24 ce qui permet de
tester le bon fonctionnement du circuit d'alarme 22.The
En condition normale de l'installation 1, l'actuateur 21 obture la
deuxième dérivation 13 et le clapet 14 obture le conduit de sortie 9. Ainsi, le
réseau 2 de sprinkleurs 3, et le conduit 10 sont déconnectés du réseau d'eau sous
pression 4 et peuvent être mis en dépression par la pompe à vide 11. Le circuit
d'alarme hydraulique 22 est également hors eau.In normal condition of
La référence 25 représente un pressostat d'alarme, la référence 26 un
filtre et la référence 27 une alarme hydraulique.
Les figures 2 et 3 montrent en détail l'actuateur 21.Figures 2 and 3 show in detail the
Cet actuateur comporte un corps de cylindre 30 présentant un orifice
axial 31 prévu dans un raccord 31a avec un conduit 13b menant au conduit 10,
et deux orifices radiaux 32, 33 diamétralement opposés et prévus dans des
raccords 34, 35 avec un conduit 13a menant à la chambre de commande 12 et le
circuit 22. L'extrémité du corps de cylindre 30 opposée à l'orifice axial 31 est
obturée par un couvercle moleté 36. Une ogive 37 est montée coulissante dans
la cavité interne 38 de corps de cylindre 30. L'ogive 37 est solidaire d'une tige
39 qui traverse le couvercle 36 et qui comporte, à son extrémité extérieure, une
manette 40. Un ressort de traction 41 est fixé par l'une de ses extrémités au
couvercle 36 et par l'autre extrémité à l'ogive 37. Une membrane d'étanchéité
cylindrique 42 est interposée entre l'ogive 37 et le couvercle 36. Les conduits
13a et 13b constituent la deuxième dérivation 13 décrite plus haut. La cavité
interne 38 entre l'ogive 37 et le couvercle 36 est normalement à la pression
atmosphérique.This actuator comprises a
L'ogive 37 peut prendre deux positions, une position de fermeture
montrée sur la figure 2 dans laquelle l'ogive obture ensemble les orifices 31, 32
et 33, et une position d'ouverture, ou de déclenchement, dans laquelle l'ogive 37
est maintenu du côté du couvercle 36 par le ressort de traction 41, les orifices
31, 32 et 33 communiquant alors entre eux.The
Les figures 4 et 5 montrent un sprinkleur 3 destiné à l'installation 1 selon
l'invention. Ce sprinkleur 3 comporte un raccord 50 pour sa fixation sur la
tuyauterie du réseau 2, qui présente, en son centre, un orifice 51 normalement
obturé par un fusible 52, une ampoule par exemple, en appui contre un étrier 53
solidaire du raccord 50, et un déflecteur 54 fixé sur l'étrier 53 en regard de
l'orifice 51. Dans l'orifice 51, est montée une collerette 55 qui sert d'appui à une
première extrémité d'un ressort de compression 56, dont l'autre extrémité est en
appui sur la face inférieure d'un cabochon 57 qui obture normalement l'orifice
51 et qui présente, sur sa face externe , un berceau de support 58 pour la base de
l'ampoule. Le serrage du fusible 52 comprime la cabochon 57 et le ressort 56.Figures 4 and 5 show a
A l'élévation de la température de l'air ambiant, au delà d'une
température déterminée en fonction du type de fusible 52, ce dernier éclate et le
ressort 56 se détend et éjecte le cabochon 57, mettant ainsi le réseau 2 de
sprinkleurs 3 à la pression atmosphérique.When the ambient air temperature rises, beyond a
temperature determined according to the type of
Le ressort de traction 41 de l'actuateur 21 est calibré de telle manière
que, lorsque le réseau 2 de sprinkleurs est en dépression par rapport à la pression
atmosphérique, la dépression existant dans le conduit 13b puisse maintenir
l'ogive 37 dans la position de fermeture, et de telle manière que, lorsque la
pression dans le conduit 13b augmente et approche de la pression
atmosphérique, par suite d'une rupture d'un fusible 52 de sprinkleur, l'ogive 37
se déplace vers la position d'ouverture sous l'action du ressort de traction 41 et
des écarts de pression entre l'orifice 31 et la cavité 38.The
Lorsque l'actuateur 21 se met dans la position d'ouverture de la
deuxième dérivation 13, la pression dans la chambre de commande 12 chute
brutalement et le clapet 14 s'ouvre, mettant en eau le réseau 2 de sprinkleurs 3
par la conduite de sortie 9 et le conduit 10. Le conduit 13b se remplit également
d'eau ainsi que le circuit d'alarme 22. L'actuateur 21 reste ensuite
automatiquement dans la position d'ouverture. When the
Pour mettre en service l'installation 1, la procédure est la suivante : On
ferme la vanne de barrage 8, on met en marche la pompe à vide 11 et on
applique l'ogive 37 contre l'orifice 31 en appuyant sur la manette 40. Lorsque la
dépression dans le réseau 2 de sprinkleurs est suffisante pour maintenir
l'actuateur 21 en position de fermeture, on relache la manette 40 et on ouvre la
vanne 17 pour la mise à pression de la chambre de commnde 12. Les
équilibrages dans la soupape 6 et la fermeture du clapet 14 se feront par
l'intermédiaire de la soupape de sureté 60 et de l'orifice calibré 18. Lorsque les
pressions dans la conduite d'entrée 7 et la chambre de commande 12, lues sur
les manomètres 19 et 20, sont identiques, la soupape 6 est opérationnelle. Il ne
reste plus qu'à ouvrir la vanne de barrage 8. La pression dans le réseau 2 de
sprinkleurs est inférieure à la pression atmosphérique d'une valeur de -
0,6 bar
environ.To
Claims (7)
- A fire protection installation of the type comprising a normally dry network (2) of sprinklers (3) that may be fed with water via a control station (5) that is connected to a supply of water under pressure (4), when the dry network (2) of sprinklers (3) is put to atmospheric pressure due to said network of sprinklers being opened, the network (2) of sprinklers (3) being evacuated and being normally maintained at a pressure that is lower than the atmospheric pressure, the control station (5) comprising a valve body (6) containing a nonreturn valve member (14), said valve body (6) having a water inlet duct (7) connected to the water supply (4) and normally closed by the valve member (14), and an outlet duct (9) connected to the evacuated network (2) of sprinklers (3) for being put into communication with the inlet duct (7) by displacement of the valve member (14) under the action of an actuator (21), characterised by the fact that the valve body (16) is a three-port valve body and includes a control chamber (12) separated from the inlet duct (7) by the valve member (14) and is connected to the inlet duct (7) by a first branch (15), said first branch (15) enabling equal pressures to be maintained between the inlet duct (7) and the control chamber (12) so that the valve member (14) closes the inlet duct (7) and isolates the outlet duct (9), and by the fact that the actuator (21) is provided in a second branch (13) for connecting the control chamber (12) to the evacuated network (2) of sprinklers (3), said actuator (21) being capable of maintaining said second branch (13) closed, when the evacuated network (2) of sprinklers (3) is at a low pressure, and of permanently opening said second branch (13), when the pressure in the evacuated network (2) of sprinklers (3) exceeds a predetermined threshold pressure below the atmospheric pressure, thereby causing the pressure in the control chamber (12) to drop and the valve member (14) to open.
- An installation according to claim 1, characterised by the fact that the actuator (21) comprises a cylinder body (30) having an axial orifice (31) connected to the evacuated network (2) of sprinklers (3) and a radial orifice (32) connected to the control chamber (12), a plug (37) slidably mounted in said cylinder body (30) for closing both the axial orifice (31) and the radial orifice (32) when in a closed position and for putting the axial orifice and the radial orifice into communication with each other when in an open position, resilient means interposed between the plug (37) and the cylinder body (30) for urging the plug (37) relative to the cylinder body (30) away from the closed position thereof towards the open position thereof whenever the pressure in the evacuated network (2) of sprinklers (3) exceeds said predetermined threshold pressure, and an external handle (40) connected to the plug (37) by a control rod (39) for enabling the plug (37) to be moved into the closed position thereof while the network (2) of sprinklers (3) is being evacuated as well as the opening of the valve member (14) to be triggered.
- An installation according to claim 2, characterised by the fact that the cylinder body (30) of the actuator (21) further includes a second radial orifice (33) connected to a water alarm network (22) that may be closed by the plug (37) when in the closed position thereof and for communicating with the control chamber (12) when the plug (37) is in the open position thereof.
- An installation according to one of claims 1 to 3, in which each sprinkler (3) of the evacuated network includes a fuse (52) interposed between a bracket (53) and a water outlet orifice (51) of said sprinkler, characterised by the fact that means are provided between said outlet orifice (51) and said fuse (52) for positively opening said orifice (51) in an event-of the fuse (52) being destroyed.
- An installation according to claim 4, characterised by the fact that the means for positively opening said orifice (51) include resilient means (56) interposed between said orifice (51) and said fuse (52).
- An installation according to claim 5, characterised by the fact that the resilient means comprise a compression spring (56) bearing on a collar (55) provided in the orifice (51) of the sprinkler (3) thereof and against a tee (57) closing said orifice (51) thereof, and said tees have a support cradle (58) for the fuse (52) thereof.
- An installation according to one of claims 1 to 6, characterised by the fact that it includes means (11) for reducing the pressure in the evacuated network (2) of sprinklers (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9410892A FR2724323A1 (en) | 1994-09-13 | 1994-09-13 | FIRE PROTECTION SYSTEM |
| FR9410892 | 1994-09-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0701841A1 EP0701841A1 (en) | 1996-03-20 |
| EP0701841B1 true EP0701841B1 (en) | 1999-12-22 |
Family
ID=9466881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19950402044 Expired - Lifetime EP0701841B1 (en) | 1994-09-13 | 1995-09-11 | Installation for fire protection |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0701841B1 (en) |
| AU (1) | AU695191B2 (en) |
| CA (1) | CA2158200C (en) |
| DE (1) | DE69514058T2 (en) |
| FR (1) | FR2724323A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10208052C1 (en) * | 2002-02-25 | 2003-11-27 | Preussag Ag Minimax | Building sprinkler installation has reduced pressure generated in pipeline network during opening for sprinkler replacement or repair |
| FR3002163B1 (en) * | 2013-02-21 | 2016-12-30 | Vactec | PNEUMATIC PRESSURE RESTRICTER WHERE SECONDARY ADJUSTMENT IS INTERCHANGEABLE, AND CORRESPONDING FIRE FIGHTING FACILITY |
| FR3002154B1 (en) | 2013-02-21 | 2015-12-04 | Vactec | FIRE FIGHTING APPARATUS, INCLUDING A VACUUM SPRINKLERS NETWORK, WHICH CAN BE TRIGGERED BY A PILOT ACTUATOR BY A MASTER ACTUATOR |
| FR3002150B1 (en) | 2013-02-21 | 2018-03-16 | Vactec | SPRINKLER COMPRISING A SHUTTER OPERATOR MADE IN POSITION BY A FUSE USING A DISPLACABLE SUPPORT MEANS |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3759331A (en) * | 1972-04-27 | 1973-09-18 | Factory Mutual Res Corp | Fire protection system utilizing dry pipes normally maintained in a vacuum |
| FR2225927A5 (en) * | 1973-04-13 | 1974-11-08 | Materiel Ind Projection | Remotely controlled fire extinguisher installation - has 3-way valve between fluid reservoir and discharge circuit |
| CA1265972A (en) * | 1985-07-18 | 1990-02-20 | Alan George William Dry | Dry sprinkler system |
| US5010959A (en) * | 1989-12-07 | 1991-04-30 | Automatic Sprinkler Corporation Of America | Automatic sprinkler head |
-
1994
- 1994-09-13 FR FR9410892A patent/FR2724323A1/en active Granted
-
1995
- 1995-09-11 DE DE1995614058 patent/DE69514058T2/en not_active Expired - Lifetime
- 1995-09-11 EP EP19950402044 patent/EP0701841B1/en not_active Expired - Lifetime
- 1995-09-13 AU AU30640/95A patent/AU695191B2/en not_active Expired
- 1995-09-13 CA CA002158200A patent/CA2158200C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE69514058T2 (en) | 2000-09-14 |
| CA2158200C (en) | 2007-01-02 |
| EP0701841A1 (en) | 1996-03-20 |
| DE69514058D1 (en) | 2000-01-27 |
| AU3064095A (en) | 1996-03-28 |
| CA2158200A1 (en) | 1996-03-14 |
| AU695191B2 (en) | 1998-08-06 |
| FR2724323A1 (en) | 1996-03-15 |
| FR2724323B1 (en) | 1997-02-07 |
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