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EP1029558A1 - Fire protection valve - Google Patents

Fire protection valve Download PDF

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Publication number
EP1029558A1
EP1029558A1 EP00400433A EP00400433A EP1029558A1 EP 1029558 A1 EP1029558 A1 EP 1029558A1 EP 00400433 A EP00400433 A EP 00400433A EP 00400433 A EP00400433 A EP 00400433A EP 1029558 A1 EP1029558 A1 EP 1029558A1
Authority
EP
European Patent Office
Prior art keywords
rod
valve
return spring
valve according
spring
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.)
Granted
Application number
EP00400433A
Other languages
German (de)
French (fr)
Other versions
EP1029558B1 (en
Inventor
Wilhelm Paul Strulik
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1029558A1 publication Critical patent/EP1029558A1/en
Application granted granted Critical
Publication of EP1029558B1 publication Critical patent/EP1029558B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/18—Sliding dampers
    • A62C2/20—Sliding dampers at 90 degrees to the plane of the opening
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers
    • A62C2/24—Operating or controlling mechanisms
    • A62C2/241—Operating or controlling mechanisms having mechanical actuators and heat sensitive parts
    • A62C2/242—Operating or controlling mechanisms having mechanical actuators and heat sensitive parts with fusible links

Definitions

  • the present invention relates to an aeration valve, likely to close depending on the air temperature the crossing, so as not to spread fires and smokers.
  • Figure 1 attached shows an example of a valve known ventilation, described in the French patent application FR-A-2 371 557.
  • This valve comprises a body 10, which forms a seat of valve 12.
  • the body 10 is embedded in a wall and connected to a conduit air vent C.
  • the shutter 14 intended to cooperate with the valve seat 12 so as to prevent the passage of air through the body 10.
  • a rod 16 is secured, at one of its ends, to the shutter 14.
  • the free end of the rod 16, oriented towards the duct C comprises mechanical stop means 18.
  • a bore 19 is formed in the end of the rod 16 located beyond the stop means mechanical 18, towards the ventilation duct C.
  • the rod 16 is held in a substantially central position and parallel to the axis of the seat of valve 12 by a cross 17.
  • the spider 17 has a threaded central part 17A intended to cooperate with the external thread 22 of a socket adjustment 20.
  • the adjustment sleeve 20 is screwed into the central part 17A of the spider 17.
  • the rod 16, integral with the shutter 14 is introduced into the through the adjustment sleeve 20, its free end projecting towards the conduit C.
  • the adjustment sleeve 20 therefore makes it possible both to position and guide the rod 16 and adjust the open position of the shutter 14 relative to the seat 12.
  • the portion of the rod 16, between the end 21 of the adjusting sleeve 20 and the mechanical stop means 18, is surrounded by a return spring 23.
  • the return spring 23 When the valve is open, as is the case in FIG. 1, the return spring 23 is compressed, one end return spring 23 bearing on the stop means mechanical 18, the other end resting on the end 21 of the adjusting sleeve 20.
  • the means forming the trigger system 24 of the valve consist of a lug 25 integral with the adjustment sleeve 20 and disposed near the end 21 of the socket 20.
  • This tab 25 is connected to a fuse element 30; the element fuse 30 being, itself, connected to bore 19, located at the rear of the stop means 18, by means of a rod 32.
  • a lock nut 40 cooperating with the thread 22 of the sleeve regale 20 allows to block the position of the socket 20, in the part central 17A of the cross 17.
  • the presence of the fuse element 30 therefore maintains the spring return 23 in a compressed state, between the stop means 18 and the end 21 of the sleeve 20.
  • the resistance properties fuse element 30 change causing it to break, less partial, which thus causes the return spring 23 to relax.
  • the return spring 23 bears on the end 21 of the adjustment sleeve 20 which is itself immobilized with respect to the spider 17. This end of the spring is therefore immobilized.
  • the second end of the return spring pushes on the stop means mechanical 18 which are arranged on the rod 16 which is movable. Relaxation the return spring 23 causes the displacement of the rod 16 towards the air duct C, which causes the valve to close, the shutter 14 being driven towards the conduit C and thus blocking the seat valve 12.
  • the return spring 23 being disposed at the rear of the sleeve setting 20, the rod 16 must be long enough to allow the installation at its free end, of the return spring 23 and the means forming a fuse 24.
  • the length of the rod 16 can be troublesome. Indeed, either it is impossible to install the valve, the space between the air duct C and the body of valve 10 not allowing the introduction of the rod 16, ie the rod 16 risk of damaging the ventilation duct C when the spring is released 23.
  • the ventilation duct C may also interfere with the relaxation of the return spring thus preventing the correct closing of the valve.
  • valve insufficient closing pressure regardless of air temperature entering through valve seat 12.
  • the valve insufficiently closed is liable, by a lack of sealing, to contribute to the spread of the fire or fire.
  • valves should be subject to periodic technical checks. It is therefore important to have valves designed in such a way that they no longer require these controls.
  • the aim of the present invention is to solve the problems techniques related to the use of prior art valves.
  • said spring booster is, in compressed state, at least partially contained inside of said adjusting sleeve, the first end of said adjusting sleeve adjustment comprising a rim, serving as a support at one end of said return spring, when it is released, the other end of said spring being secured to the second end of the rod, whereby the entire length of the adjustment sleeve is used to receive the return spring.
  • the bulk longitudinal due to the assembly constituted by the bush and the return spring is very significantly reduced. This gives more freedom to choose the shutter stroke, the closing speed and especially the pressure of closing.
  • the spring in the compressed state, is fully contained in the adjustment sleeve and preferably also the second end of the socket is closed.
  • the spring is fully contained in the adjustment sleeve and preferably also the second end of the socket is closed.
  • This type of fuse means is simple to produce and has the advantage of occupying a more restricted space than the means forming prior art fuse.
  • a shorter rod can be used to connect the shutter to the fuse means.
  • the fusible link element must maintain the compression of the spring, when the temperature of the air passing through the valve does not exceed its melting temperature.
  • the choice of material constitutive of this element is, therefore, decisive.
  • the means forming fuse include a cover on which the free end of the rod, and intended to close, at least partially, the opening of the sleeve adjustment located opposite the ventilation duct and fixing means temporary fuses of this cover on the open end of the socket setting.
  • fixing means are liable to give way when the temperature of the air entering the valve seat exceeds one determined temperature. The compressed return spring inside the adjusting sleeve, closed by the cover, is thus protected from air exterior and therefore protected from any risk of corrosion.
  • the fixing means cover have a part with a fixing surface mounted on the adjustment sleeve, the cover being fixed on the surface of fixing of the part by means of an adhesive material capable to melt at a certain temperature.
  • the presence of the cover closing off the bush allows to hermetically seal the spring inside the adjustment sleeve.
  • the part consists of a nut comprising an internal thread capable of cooperating with the external thread of the sleeve adjustment.
  • the cover completely covers the opening of the adjustment sleeve, in order to obtain effective protection of the spring reminder.
  • the valve according to the present invention includes a valve body 100, forming a valve seat 120. Either the valve is embedded in a wall and connected to a conduit ventilation C, or one end of the duct is engaged in an orifice the wall and the body of the valve is fitted into the end of the conduit.
  • a shutter 140 is mounted inside the valve body.
  • the shutter 140 has a shape adapted to cooperate with a portion of valve seat 120 to prevent air from entering in the valve, in the closed position.
  • a rod 160 in one piece is secured by one of its ends, to the shutter 140.
  • Support means 170 comprising a central portion 170A threaded and at least two connected arms to the body 100, keep the rod 160 substantially in the center of the valve seat 120 and parallel to its axis.
  • An adjustment socket 200 with an external thread 220 is screwed into the central part 170A having an internal thread.
  • the rod 160 passes through the adjustment sleeve 200 and is thus held at inside the valve seat 120.
  • the free end of the rod 160, located opposite the conduit C includes, as standard, mechanical stop means 180 which may consist of an attached washer.
  • a return spring 230 surrounds the rod 160 and is supported, when it is compressed on the mechanical stop means 180 and on a flange 202 located inside the adjustment sleeve 200.
  • the means forming fuse 240 have a first tab 250 mounted close to the free end of the socket 210 and a second tab 260, fixed to the end of the rod 160.
  • This second tab 260 can also, depending on its mode of attachment to the rod 160, act as a means of stop 180.
  • the fuse element 300 comprises two non-fusible parts 302 and 304 provided with orifices 306 and 308 each capable of receiving the end of one of the legs 250 and 260.
  • the two parts 302 and 304 are connected together by a 300A layer of a fusible material at the predetermined temperature.
  • a fusible material at the predetermined temperature.
  • he can be a welding or soldering material or an adhesive having a very low softening share.
  • Figure 3 shows the thermal trip means when the fuse element has blown and the return spring 230 is relaxed. Because part of the spring is contained in the bushing, the distance between the bearing face 202 of the sleeve and the end 180 of the rod is reduced compared to previous solutions.
  • a nut 400 is fitted to the external surface of the bush 200 making it possible to immobilize the bush relative to the part central 170A support means.
  • FIG. 5 represents a second embodiment of the thermal trip means.
  • the rod 160 comprises, at its free end, mechanical stop means 180 which can be, for example, a collar, as shown in FIG. 4.
  • the return spring 230 partially surrounds the rod 160 and is supported, at one of its ends, on the internal rim 202 of the socket 200 and, by its other end, on the stop means mechanical 180.
  • the end 210 of the socket 200 is equipped with a threaded nut 600 cooperating with thread 220 of the adjusting sleeve 200.
  • a cover 500 is intended to close the open end of the socket 200. It can be perforated or completely cover the end socket 200 open.
  • the cover 500 and the nut 600 are joined by a layer of an adhesive material 700, fusible from a determined temperature and interposed between a fixing surface 602 of the nut and the cover.
  • the socket 220 is equipped with a stop mechanical 604 to limit the screwing of the fuse element constituted by nut 600 and cover 500 during assembly of the thermal release.
  • the adhesive material can be a weld, solder or glue.
  • the material 700 melts or at least softens enough to lose mechanical properties of joining of the two parts; under the thrust of the return spring 230, the cover 500 detaches from the nut 600 which causes the relaxation of spring 230.
  • the spring bearing both on the flange 202 and on the stop means 180, relaxes, tearing off the cover 500 and pulling backward shutter 140, which has the effect of closing the valve.
  • This embodiment provides protection optimal return spring.
  • a 400 nut also equips the surface of the adjustment bush 200 in order to block the position of the adjustment bush 200 inside the central part 170A of the means support 170.
  • the body 100 and the shutter 140 are preferably made with a fire-resistant material which may be provided with a coating of insulating material to limit thermal conduction.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)
  • Check Valves (AREA)
  • Magnetically Actuated Valves (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

The valve consists of a body (100) forming a seat (120) for a shutter (140) connected by a rod (160) to a support (170) with a threaded hole (170A) for a regulating bush (200). The rod is surrounded at least partially by a return spring (230) which is released by a fuse (240) when the temperature of the air passing through the valve exceeds a set level. In its compressed state the return spring (230) is located at least partially inside the regulating bush and is held in place by a rim (202) on the end of the bush. The other end of the spring presses against a collar on the rear end of the rod and forces the valve shutter into its closed position when the fuse releases it.

Description

La présente invention concerne une soupape d'aération, susceptible de se fermer en fonction de la température de l'air la traversant, de façon à ne pas propager les incendies et les fumeurs.The present invention relates to an aeration valve, likely to close depending on the air temperature the crossing, so as not to spread fires and smokers.

La figure 1 annexée représente un exemple de soupape d'aération connue, décrite dans la demande de brevet français FR-A-2 371 557.Figure 1 attached shows an example of a valve known ventilation, described in the French patent application FR-A-2 371 557.

Cette soupape comporte un corps 10, qui forme un siège de soupape 12. Le corps 10 est encastré dans une paroi et relié à un conduit d'aération C. Au centre du siège de soupape 12, se situe l'obturateur 14 destiné à coopérer avec le siège de soupape 12 de manière à empêcher le passage de l'air à travers le corps 10.This valve comprises a body 10, which forms a seat of valve 12. The body 10 is embedded in a wall and connected to a conduit air vent C. In the center of the valve seat 12 is the shutter 14 intended to cooperate with the valve seat 12 so as to prevent the passage of air through the body 10.

Une tige 16 est solidaire, à l'une de ses extrémités, de l'obturateur 14. L'extrémité libre de la tige 16, orientée vers le conduit C comporte des moyens de butée mécanique 18. Un alésage 19 est ménagé dans l'extrémité de la tige 16 située au delà des moyens de butée mécanique 18, vers le conduit d'aération C. La tige 16 est maintenue dans une position sensiblement centrale et parallèlement à l'axe du siège de soupape 12 par un croisillon 17.A rod 16 is secured, at one of its ends, to the shutter 14. The free end of the rod 16, oriented towards the duct C comprises mechanical stop means 18. A bore 19 is formed in the end of the rod 16 located beyond the stop means mechanical 18, towards the ventilation duct C. The rod 16 is held in a substantially central position and parallel to the axis of the seat of valve 12 by a cross 17.

Le croisillon 17 comporte une partie centrale filetée 17A destinée à coopérer avec le filetage externe 22 d'une douille de réglage 20. La douille de réglage 20 est vissée dans la partie centrale 17A du croisillon 17. La tige 16, solidaire de l'obturateur 14 est introduite au travers de la douille de réglage 20, son extrémité libre dépassant vers le conduit C. La douille de réglage 20 permet donc, à la fois, de positionner et de guider la tige 16 et de régler la position d'ouverture de l'obturateur 14 par rapport au siège 12.The spider 17 has a threaded central part 17A intended to cooperate with the external thread 22 of a socket adjustment 20. The adjustment sleeve 20 is screwed into the central part 17A of the spider 17. The rod 16, integral with the shutter 14 is introduced into the through the adjustment sleeve 20, its free end projecting towards the conduit C. The adjustment sleeve 20 therefore makes it possible both to position and guide the rod 16 and adjust the open position of the shutter 14 relative to the seat 12.

La portion de la tige 16, comprise entre l'extrémité 21 de la douille de réglage 20 et les moyens de butée mécanique 18, est entourée par un ressort de rappel 23. Lorsque la soupape est ouverte, comme c'est le cas sur la figure 1, le ressort de rappel 23 est comprimé, une extrémité du ressort de rappel 23 prenant appui sur les moyens de butée mécanique 18, l'autre extrémité prenant appui sur l'extrémité 21 de la douille de réglage 20.The portion of the rod 16, between the end 21 of the adjusting sleeve 20 and the mechanical stop means 18, is surrounded by a return spring 23. When the valve is open, as is the case in FIG. 1, the return spring 23 is compressed, one end return spring 23 bearing on the stop means mechanical 18, the other end resting on the end 21 of the adjusting sleeve 20.

Le moyen formant le système de déclenchement 24 de la soupape selon l'art antérieur, se composent d'une patte 25 solidaire de la douille de réglage 20 et disposée à proximité de l'extrémité 21 de la douille 20. Cette patte 25 est reliée à un élément fusible 30 ; l'élément fusible 30 étant, lui-même, relié à l'alésage 19, situé à l'arrière des moyens de butée 18, au moyen d'une tige 32.The means forming the trigger system 24 of the valve according to the prior art, consist of a lug 25 integral with the adjustment sleeve 20 and disposed near the end 21 of the socket 20. This tab 25 is connected to a fuse element 30; the element fuse 30 being, itself, connected to bore 19, located at the rear of the stop means 18, by means of a rod 32.

Un contre-écrou 40 coopérant avec le filetage 22 de la douille de régale 20 permet de bloquer la position de la douille 20, dans la partie centrale 17A du croisillon 17.A lock nut 40 cooperating with the thread 22 of the sleeve regale 20 allows to block the position of the socket 20, in the part central 17A of the cross 17.

La présence de l'élément fusible 30 maintient donc le ressort de rappel 23 dans un état comprimé, entre les moyens de butée 18 et l'extrémité 21 de la douille 20. Lorsque l'air, entrant dans le siège de soupape 12, atteint une température déterminée, dépendant du matériau dans lequel est réalisé l'élément fusible 30, les propriétés de résistance mécanique de l'élément fusible 30 se modifient provoquant sa rupture, au moins partielle, qui entraíne ainsi la détente du ressort de rappel 23.The presence of the fuse element 30 therefore maintains the spring return 23 in a compressed state, between the stop means 18 and the end 21 of the sleeve 20. When the air entering the seat of valve 12, reaches a determined temperature, depending on the material in which the fusible element 30 is made, the resistance properties fuse element 30 change causing it to break, less partial, which thus causes the return spring 23 to relax.

Le ressort de rappel 23 prend appui sur l'extrémité 21 de la douille de réglage 20 qui est, elle, immobilisée par rapport au croisillon 17. Cette extrémité du ressort est donc imobilisée. La seconde extrémité du ressort de rappel exerce une poussée sur les moyens de butée mécanique 18 qui sont disposés sur la tige 16 qui est mobile. La détente du ressort de rappel 23 entraíne le déplacement de la tige 16 vers le conduit d'aération C, ce qui provoque la fermeture de la soupape, l'obturateur 14 étant entraíné vers le conduit C et bouchant ainsi le siège de soupape 12.The return spring 23 bears on the end 21 of the adjustment sleeve 20 which is itself immobilized with respect to the spider 17. This end of the spring is therefore immobilized. The second end of the return spring pushes on the stop means mechanical 18 which are arranged on the rod 16 which is movable. Relaxation the return spring 23 causes the displacement of the rod 16 towards the air duct C, which causes the valve to close, the shutter 14 being driven towards the conduit C and thus blocking the seat valve 12.

Ce type de soupape présente néanmoins plusieurs inconvénients.This type of valve nevertheless presents several disadvantages.

Le ressort de rappel 23 étant disposé à l'arrière de la douille de réglage 20, la tige 16 doit être suffisamment longue pour permettre l'installation à son extrémité libre, du ressort de rappel 23 et des moyens formant fusible 24.The return spring 23 being disposed at the rear of the sleeve setting 20, the rod 16 must be long enough to allow the installation at its free end, of the return spring 23 and the means forming a fuse 24.

Lorsque la soupape doit être raccordée à un conduit C présentant un coude immédiatement après la soupape, la longueur de la tige 16 peut se révéler gênante. En effet, soit il est impossible d'installer la soupape, l'espace compris entre le conduit d'aération C et le corps de soupape 10 ne permettant pas l'introduction de la tige 16, soit la tige 16 risque de détériorer le conduit d'aération C lors de la détente du ressort de rappel 23. Le conduit d'aération C risque également de gêner la détente du ressort de rappel empêchant ainsi la fermeture correcte de la soupape.When the valve must be connected to a pipe C having a bend immediately after the valve, the length of the rod 16 can be troublesome. Indeed, either it is impossible to install the valve, the space between the air duct C and the body of valve 10 not allowing the introduction of the rod 16, ie the rod 16 risk of damaging the ventilation duct C when the spring is released 23. The ventilation duct C may also interfere with the relaxation of the return spring thus preventing the correct closing of the valve.

Un autre inconvénient de ce type de soupape est le fait que le ressort de rappel 23 soit constamment exposé à l'air entrant par le siège de soupape 12, ce qui risque de le détériorer. En effet, une exposition prolongée à des vapeurs corrosives provenant d'une salle de bains ou d'une cuisine, par exemple, risque d'oxyder le ressort de rappel ou de provoquer l'apparition de dépôts à sa surface, entraínant un mauvais fonctionnement de la soupape en cas d'incendie, sans qu'aucun signe extérieur n'alerte l'attention lors d'une opération de vérification ou d'entretien.Another disadvantage of this type of valve is the fact that the return spring 23 is constantly exposed to the air entering through the seat valve 12, which may damage it. Indeed, an exhibition prolonged to corrosive fumes from a bathroom or kitchen, for example, may oxidize the return spring or cause the appearance of deposits on its surface, causing bad valve operation in case of fire, without any sign exterior does not alert attention during a verification operation or maintenance.

En effet, si le ressort de rappel 23 est détérioré au point de perdre une partie de ses propriétés mécaniques, il n'est plus capable de se détendre correctement, la soupape ne se ferme donc qu'avec une pression de fermeture insuffisante, quelle que soit la température de l'air entrant par le siège de soupape 12. En cas d'incendie, la soupape insuffisamment fermée est susceptible, par un manque d'étanchéité, de contribuer à la propagation de l'incendie ou de l'incendie.Indeed, if the return spring 23 is damaged to the point of lose some of its mechanical properties, it is no longer able to relax properly, the valve therefore only closes with a insufficient closing pressure, regardless of air temperature entering through valve seat 12. In case of fire, the valve insufficiently closed is liable, by a lack of sealing, to contribute to the spread of the fire or fire.

En outre, les soupapes connues doivent faire l'objet de contrôles techniques périodiques. Il est donc important de disposer de soupapes conçues de telle manière qu'elles ne nécessitent plus ces contrôles. In addition, known valves should be subject to periodic technical checks. It is therefore important to have valves designed in such a way that they no longer require these controls.

Le but de la présente invention est de résoudre les problèmes techniques liés à l'utilisation des soupapes de l'art antérieur.The aim of the present invention is to solve the problems techniques related to the use of prior art valves.

Ce but est atteint au moyen d'une soupape de protection contre l'incendie, destinée aux conduites d'aération, du type comprenant :

  • un corps de soupape dans lequel est disposé le siège de soupape ;
  • un obturateur susceptible de coopérer avec les parois dudit siège de soupape, de façon à empêcher le passage de l'air à travers ledit siège de soupape ;
  • une tige dont une première extrémité est solidaire audit obturateur ;
  • des moyens de support de ladite extrémité libre de ladite tige pour maintenir ladite tige selon l'axe dudit siège, lesdits moyens de support comportant une partie centrale munie d'un filetage interne et ;
  • une douille de réglage filetée traversée par ladite tige et coopérant avec ledit filetage interne de ladite partie centrale, ladite douille présentant une première extrémité proche dudit obturateur et une deuxième extrémité ;
  • un ressort de rappel entourant au moins partiellement ladite tige, destiné à entraíner en déplacement ladite tige et ;
  • des moyens formant fusible pour maintenir ledit obturateur écarté desdites parois dudit siège de soupape et susceptibles de provoquer la détente dudit ressort de rappel, quand la température de l'air pénétrant à travers ledit siège dépasse une valeur déterminée, lesdits moyens fusibles coopérant avec la deuxième extrémité de ladite tige.
This object is achieved by means of a fire protection valve, intended for ventilation ducts, of the type comprising:
  • a valve body in which the valve seat is disposed;
  • a shutter capable of cooperating with the walls of said valve seat, so as to prevent the passage of air through said valve seat;
  • a rod, a first end of which is integral with said shutter;
  • means for supporting said free end of said rod to hold said rod along the axis of said seat, said support means comprising a central part provided with an internal thread and;
  • a threaded adjusting bushing traversed by said rod and cooperating with said internal threading of said central part, said bushing having a first end close to said shutter and a second end;
  • a return spring at least partially surrounding said rod, intended to cause displacement of said rod and;
  • fuse means for holding said shutter away from said walls of said valve seat and capable of causing the expansion of said return spring, when the temperature of the air entering through said seat exceeds a determined value, said fuse means cooperating with the second end of said rod.

De façon caractéristique, selon l'invention, ledit ressort de rappel est, à l'état comprimé, au moins partiellement contenu à l'intérieur de ladite douille de réglage, la première extrémité de ladite douille de réglage comprenant un rebord, servant d'appui à une extrémité dudit ressort de rappel, lors de sa détente, l'autre extrémité dudit ressort étant solidaire de la deuxième extrémité de la tige, par quoi la totalité de la longueur de la douille de réglage sert à recevoir le ressort de rappel. Typically, according to the invention, said spring booster is, in compressed state, at least partially contained inside of said adjusting sleeve, the first end of said adjusting sleeve adjustment comprising a rim, serving as a support at one end of said return spring, when it is released, the other end of said spring being secured to the second end of the rod, whereby the entire length of the adjustment sleeve is used to receive the return spring.

Grâce aux dispositions de l'invention, l'encombrement longitudinal dû à l'ensemble constitué par la douille et le ressort de rappel est très sensiblement réduit. Cela donne davantage de liberté pour choisir la course de l'obturateur, la vitesse de fermeture et surtout la pression de fermeture.Thanks to the provisions of the invention, the bulk longitudinal due to the assembly constituted by the bush and the return spring is very significantly reduced. This gives more freedom to choose the shutter stroke, the closing speed and especially the pressure of closing.

De préférence, à l'état comprimé, le ressort est entièrement contenu dans la douille de réglage et de préférence également la deuxième extrémité de la douille est obturée. On obtient ainsi une protection du ressort contre les éventuels dépôts de particules et la corrosion.Preferably, in the compressed state, the spring is fully contained in the adjustment sleeve and preferably also the second end of the socket is closed. We thus obtain a protection of the spring against possible deposits of particles and corrosion.

Avantageusement, les moyens formant fusible comprennent :

  • une première patte fixée sur ladite douille de réglage ;
  • une seconde patte fixée à ladite tige et située plus près de l'extrémité libre de la tige que les moyens de butée mécanique ; et
  • un élément de liaison fusible destiné à relier ladite première et ladite seconde patte de manière à comprimer le ressort de rappel ; l'élément fusible étant susceptible de fondre lorsque la température de l'air entrant dans ledit corps est supérieure à une température déterminée.
Advantageously, the means forming a fuse comprise:
  • a first tab fixed on said adjustment socket;
  • a second tab fixed to said rod and located closer to the free end of the rod than the mechanical stop means; and
  • a fusible link element intended to connect said first and said second tab so as to compress the return spring; the fuse element being capable of melting when the temperature of the air entering said body is greater than a determined temperature.

Ce type de moyens formant fusible est simple à réaliser et a l'avantage d'occuper un espace plus restreint que les moyens formant fusible de l'art antérieur. Une tige plus courte peut être utilisée pour relier l'obturateur aux moyens formant fusible.This type of fuse means is simple to produce and has the advantage of occupying a more restricted space than the means forming prior art fuse. A shorter rod can be used to connect the shutter to the fuse means.

L'élément de liaison fusible doit assurer le maintien de la compression du ressort, lorsque la température de l'air traversant la soupape n'excède pas sa température de fusion. Le choix du matériau constitutif de cet élément est, par conséquent, déterminant.The fusible link element must maintain the compression of the spring, when the temperature of the air passing through the valve does not exceed its melting temperature. The choice of material constitutive of this element is, therefore, decisive.

Selon un mode de réalisation préféré, les moyens formant fusible comprennent un couvercle sur lequel s'appuie l'extrémité libre de la tige, et destiné à fermer, au moins partiellement, l'ouverture de la douille de réglage se situant face au conduit d'aération et des moyens de fixation temporaire fusibles de ce couvercle sur l'extrémité ouverte de la douille de réglage. Ces moyens de fixation sont susceptibles de céder lorsque la température de l'air pénétrant dans le siège de soupape dépasse une température déterminée. Le ressort de rappel comprimé à l'intérieur de la douille de réglage, fermée par le couvercle, est ainsi à l'abri de l'air extérieur et donc protégé de tout risque de corrosion.According to a preferred embodiment, the means forming fuse include a cover on which the free end of the rod, and intended to close, at least partially, the opening of the sleeve adjustment located opposite the ventilation duct and fixing means temporary fuses of this cover on the open end of the socket setting. These fixing means are liable to give way when the temperature of the air entering the valve seat exceeds one determined temperature. The compressed return spring inside the adjusting sleeve, closed by the cover, is thus protected from air exterior and therefore protected from any risk of corrosion.

Selon un mode de réalisation particulier, les moyens de fixation du couvercle comportent une pièce munie d'une surface de fixation montée sur la douille de réglage, le couvercle étant fixé sur la surface de fixation de la pièce par l'intermédiaire d'un matériau adhésif susceptible de fondre à une température déterminée. La présence du couvercle obturant la douille permet d'enfermer, de manière hermétique, le ressort à l'intérieur de la douille de réglage.According to a particular embodiment, the fixing means cover have a part with a fixing surface mounted on the adjustment sleeve, the cover being fixed on the surface of fixing of the part by means of an adhesive material capable to melt at a certain temperature. The presence of the cover closing off the bush allows to hermetically seal the spring inside the adjustment sleeve.

Par matériau adhésif susceptible de fondre, il faut entendre un matériau initialement non solide qui assure la liaison mécanique des deux pièces en se solidifiant et qui, porté à une température prédéterminée, devient non solide et permet la séparation des deux pièces (soudure, brasure, colle, etc.)By adhesive material liable to melt, it is necessary to understand a initially non-solid material which provides the mechanical connection of the two parts solidifying and which, brought to a predetermined temperature, becomes non-solid and allows the separation of the two parts (welding, solder, glue, etc.)

Avantageusement, la pièce consiste en un écrou comportant un filetage intérieur apte à coopérer avec le filetage externe de la douille de réglage.Advantageously, the part consists of a nut comprising an internal thread capable of cooperating with the external thread of the sleeve adjustment.

De préférence, le couvercle recouvre entièrement l'ouverture de la douille de réglage, afin d'obtenir une protection efficace du ressort de rappel.Preferably, the cover completely covers the opening of the adjustment sleeve, in order to obtain effective protection of the spring reminder.

L'invention sera bien comprise et ses avantages apparaítront mieux à la lecture de la description détaillée qui suit, de deux modes de réalisation représentés à titre d'exemple, non limitatif. La description se réfère aux dessins annexés sur lesquels :

  • la figure 1, déjà décrite, représente une soupape selon l'art antérieur ;
  • la figure 2 représente un premier mode de réalisation d'une soupape selon l'invention ;
  • la figure 3 représente une soupape selon le premier mode de réalisation lorsque le ressort de rappel est détendu ;
  • la figure 4 est une vue en perspective montrant un mode de réalisation de l'élément fusible ; et
  • la figure 5 représente un second mode de réalisation des moyens formant fusible susceptibles d'équiper une soupape selon la présente invention.
The invention will be clearly understood and its advantages will appear better on reading the detailed description which follows, of two embodiments shown by way of example, without limitation. The description refers to the accompanying drawings in which:
  • Figure 1, already described, shows a valve according to the prior art;
  • FIG. 2 represents a first embodiment of a valve according to the invention;
  • FIG. 3 represents a valve according to the first embodiment when the return spring is relaxed;
  • Figure 4 is a perspective view showing an embodiment of the fuse element; and
  • FIG. 5 represents a second embodiment of the fuse-forming means capable of equipping a valve according to the present invention.

Les principaux éléments constitutifs de la soupape selon l'invention vont maintenant être décrits en se référant à la figure 2.The main components of the valve according to the invention will now be described with reference to FIG. 2.

De façon standard, la soupape selon la présente invention comprend un corps de soupape 100, formant un siège de soupape 120. Soit la soupape est encastrée dans une paroi et reliée à un conduit d'aération C, soit une extrémité du conduit est engagée dans un orifice de la paroi et le corps de la soupape est emboíté dans l'extrémité du conduit.As a standard, the valve according to the present invention includes a valve body 100, forming a valve seat 120. Either the valve is embedded in a wall and connected to a conduit ventilation C, or one end of the duct is engaged in an orifice the wall and the body of the valve is fitted into the end of the conduit.

Un obturateur 140 est monté à l'intérieur du corps de soupape. L'obturateur 140 présente une forme adaptée pour coopérer avec une portion du siège de soupape 120 de façon à empêcher l'air de pénétrer dans la soupape, en position fermée.A shutter 140 is mounted inside the valve body. The shutter 140 has a shape adapted to cooperate with a portion of valve seat 120 to prevent air from entering in the valve, in the closed position.

Une tige 160 en une seule pièce est solidarisée, par l'une de ses extrémités, à l'obturateur 140. Des moyens de support 170 comportant, une partie centrale 170A filetée et au moins deux bras reliés au corps 100, permettent de maintenir la tige 160 sensiblement au centre du siège de soupape 120 et parallèlement à son axe.A rod 160 in one piece is secured by one of its ends, to the shutter 140. Support means 170 comprising a central portion 170A threaded and at least two connected arms to the body 100, keep the rod 160 substantially in the center of the valve seat 120 and parallel to its axis.

Une douille de réglage 200 comportant un filetage externe 220 est vissée dans la partie centrale 170A comportant un filetage interne. La tige 160 traverse la douille de réglage 200 et est ainsi maintenue à l'intérieur du siège de soupape 120.An adjustment socket 200 with an external thread 220 is screwed into the central part 170A having an internal thread. The rod 160 passes through the adjustment sleeve 200 and is thus held at inside the valve seat 120.

L'extrémité libre de la tige 160, située face au conduit C comporte, de façon standard, des moyens de butée mécanique 180 qui peuvent consister en une rondelle rapportée.The free end of the rod 160, located opposite the conduit C includes, as standard, mechanical stop means 180 which may consist of an attached washer.

Un ressort de rappel 230 entoure la tige 160 et prend appui, lorsqu'il est comprimé sur les moyens de butée mécanique 180 et sur un rebord 202 situé à l'intérieur de la douille de réglage 200. A return spring 230 surrounds the rod 160 and is supported, when it is compressed on the mechanical stop means 180 and on a flange 202 located inside the adjustment sleeve 200.

Selon un premier mode de réalisation, les moyens formant fusible 240 comportent une première patte 250 montée à proximité de l'extrémité libre de la douille 210 et une seconde patte 260, fixée à l'extrémité de la tige 160. Cette seconde patte 260 peut également, selon son mode de solidarisation avec la tige 160, faire office de moyen de butée 180.According to a first embodiment, the means forming fuse 240 have a first tab 250 mounted close to the free end of the socket 210 and a second tab 260, fixed to the end of the rod 160. This second tab 260 can also, depending on its mode of attachment to the rod 160, act as a means of stop 180.

Comme représenté sur la figure 2, dans ce mode de réalisation, lorsque le ressort de rappel 230 est comprimé, il est contenu entièrement dans la douille de réglage 200 ; les deux pattes 250 et 260 sont maintenues rapprochées l'une de l'autre au moyen d'un élément fusible 300.As shown in Figure 2, in this mode of embodiment, when the return spring 230 is compressed, it is contained entirely in the adjustment socket 200; the two legs 250 and 260 are kept close to each other by means of an element fuse 300.

Selon un mode préféré de réalisation représenté sur la figure 4, l'élément fusible 300 comporte deux pièces non fusibles 302 et 304 munies d'orifices 306 et 308 aptes à recevoir chacun l'extrémité d'une des pattes 250 et 260.According to a preferred embodiment shown in FIG. 4, the fuse element 300 comprises two non-fusible parts 302 and 304 provided with orifices 306 and 308 each capable of receiving the end of one of the legs 250 and 260.

Les deux pièces 302 et 304 sont reliées entre elles par une couche 300A d'un matériau fusible à la température prédéterminée. Il peut s'agir d'un matériau de soudage ou de brasage ou encore d'une colle ayant une part de ramollissement très faible.The two parts 302 and 304 are connected together by a 300A layer of a fusible material at the predetermined temperature. he can be a welding or soldering material or an adhesive having a very low softening share.

La figure 3 montre les moyens de déclenchement thermique lorsque l'élément fusible a fondu et que le ressort de rappel 230 est détendu. Du fait qu'une partie du ressort est contenue dans la douille, la distance entre la face d'appui 202 de la douille et l'extrémité 180 de la tige est réduite par rapport aux solutions antérieures.Figure 3 shows the thermal trip means when the fuse element has blown and the return spring 230 is relaxed. Because part of the spring is contained in the bushing, the distance between the bearing face 202 of the sleeve and the end 180 of the rod is reduced compared to previous solutions.

De façon standard, un écrou 400 équipe la surface externe de la douille 200 permettant d'immobiliser la douille par rapport à la partie centrale 170A des moyens de support.As standard, a nut 400 is fitted to the external surface of the bush 200 making it possible to immobilize the bush relative to the part central 170A support means.

On ne sortirait pas de l'invention si, à l'état comprimé, le ressort n'était que partiellement contenu dans la douille.We would not depart from the invention if, in the compressed state, the spring was only partially contained in the socket.

La figure 5 représente un second mode de réalisation des moyens de déclenchement thermique. FIG. 5 represents a second embodiment of the thermal trip means.

Selon ce second mode de réalisation, la tige 160 comporte, à son extrémité libre, des moyens de butée mécanique 180 qui peuvent être, par exemple, une collerette, comme représenté sur la figure 4.According to this second embodiment, the rod 160 comprises, at its free end, mechanical stop means 180 which can be, for example, a collar, as shown in FIG. 4.

Le ressort de rappel 230 entoure partiellement la tige 160 et prend appui, à l'une de ses extrémités, sur le rebord interne 202 de la douille 200 et, par son autre extrémité, sur les moyens de butée mécanique 180. L'extrémité 210 de la douille 200 est équipée d'un écrou fileté 600 coopérant avec le filetage 220 de la douille de réglage 200.The return spring 230 partially surrounds the rod 160 and is supported, at one of its ends, on the internal rim 202 of the socket 200 and, by its other end, on the stop means mechanical 180. The end 210 of the socket 200 is equipped with a threaded nut 600 cooperating with thread 220 of the adjusting sleeve 200.

Un couvercle 500 est destiné à fermer l'extrémité ouverte de la douille 200. Il peut être perforé ou recouvrir entièrement l'extrémité ouverte de la douille 200.A cover 500 is intended to close the open end of the socket 200. It can be perforated or completely cover the end socket 200 open.

Le couvercle 500 et l'écrou 600 sont solidarisés par une couche d'un matériau adhésif 700, fusible à partir d'une température déterminée et interposée entre une surface de fixation 602 de l'écrou et le couvercle.The cover 500 and the nut 600 are joined by a layer of an adhesive material 700, fusible from a determined temperature and interposed between a fixing surface 602 of the nut and the cover.

De préférence, la douille 220 est équipée d'une butée mécanique 604 pour limiter le vissage de l'élément fusible constitué par l'écrou 600 et le couvercle 500 lors de l'assemblage du système de déclenchement thermique.Preferably, the socket 220 is equipped with a stop mechanical 604 to limit the screwing of the fuse element constituted by nut 600 and cover 500 during assembly of the thermal release.

Lorsque le ressort de rappel 230 est comprimé, l'extrémité de la tige 160 s'appuie sur la face interne du couvercle 500. Le matériau 700 doit donc permettre une solidarisation suffisante pour maintenir le ressort 230 dans un état comprimé. Le matériau adhésif peut être une soudure, une brasure ou encore de la colle.When the return spring 230 is compressed, the end of the rod 160 rests on the internal face of the cover 500. The material 700 must therefore allow sufficient securing to maintain the spring 230 in a compressed state. The adhesive material can be a weld, solder or glue.

Lorsque la température de l'air entrant par le siège de soupape 120 dépasse une valeur déterminée, le matériau 700 fond ou du moins se ramollit suffisamment pour perdre des propriétés mécaniques de solidarisation des deux pièces ; sous la poussée du ressort de rappel 230, le couvercle 500 se désolidarise de l'écrou 600 ce qui provoque la détente du ressort 230. When the temperature of the air entering through the valve seat 120 exceeds a determined value, the material 700 melts or at least softens enough to lose mechanical properties of joining of the two parts; under the thrust of the return spring 230, the cover 500 detaches from the nut 600 which causes the relaxation of spring 230.

Le ressort, prenant appui à la fois sur le rebord 202 et sur les moyens de butée 180, se détend, arrachant ainsi le couvercle 500 et tirant vers l'arrière l'obturateur 140, ce qui a pour effet de fermer la soupape.The spring, bearing both on the flange 202 and on the stop means 180, relaxes, tearing off the cover 500 and pulling backward shutter 140, which has the effect of closing the valve.

Ce mode de réalisation permet d'obtenir une protection optimale du ressort de rappel.This embodiment provides protection optimal return spring.

De façon standard, un écrou 400 équipe également la surface externe de la douille de réglage 200 afin de bloquer la position de la douille de réglage 200 à l'intérieur de la partie centrale 170A des moyens de support 170.As standard, a 400 nut also equips the surface of the adjustment bush 200 in order to block the position of the adjustment bush 200 inside the central part 170A of the means support 170.

Le corps 100 et l'obturateur 140 sont, de préférence, réalisés avec un matériau résistant au feu qui peut être muni d'un revêtement en matériau isolant afin de limiter la conduction thermique.The body 100 and the shutter 140 are preferably made with a fire-resistant material which may be provided with a coating of insulating material to limit thermal conduction.

Claims (10)

Soupape de protection contre l'incendie, destinée aux conduits d'aération, du type comprenant : un corps de soupape (100) formant un siège de soupape (120) ; un obturateur (140) susceptible de coopérer, en position fermée, avec ledit siège de soupape (120) ; une tige (160) dont une première extrémité est solidaire dudit obturateur ; des moyens de support (170) de ladite extrémité libre de ladite tige (160) pour maintenir ladite tige selon l'axe dudit siège (120), lesdits moyens de support (170) comportant une partie centrale (170A) munie d'un filetage interne ; une douille de réglage (200) filetée extérieurement (220) traversée par ladite tige (160) et coopérant avec ledit filetage interne de ladite partie centrale, ladite douille présentant une première extrémité proche dudit obturateur et une deuxième extrémité ; un ressort de rappel (230) entourant au moins partiellement ladite tige (160), destiné à entraíner en déplacement ladite tige (160) et ; des moyens formant fusible (240) pour maintenir ledit obturateur (140) écarté dudit siège de soupape (120) et susceptibles de provoquer la détente dudit ressort de rappel (230), quand la température de l'air pénétrant à travers ledit siège (120) dépasse une valeur déterminée, lesdits moyens coopérant avec la deuxième extrémité de ladite tige (160) ;    ladite soupape de protection se caractérisant en ce que ledit ressort de rappel (203) est, à l'état comprimé, au moins partiellement contenu à l'intérieur de ladite douille de réglage (200), la première extrémité de ladite douille de réglage (200) comprenant un rebord (202), servant d'appui à une extrémité dudit ressort de rappel (230), lors de sa détente, l'autre extrémité dudit ressort étant solidaire de la deuxième extrémité de la tige, par quoi la totalité de la longueur de la douille est utilisée pour loger le ressort.Fire protection valve, intended for ventilation ducts, of the type comprising: a valve body (100) forming a valve seat (120); a shutter (140) capable of cooperating, in the closed position, with said valve seat (120); a rod (160), a first end of which is integral with said shutter; support means (170) of said free end of said rod (160) for holding said rod along the axis of said seat (120), said support means (170) comprising a central part (170A) provided with a thread internal; an externally threaded adjusting bush (200) traversed by said rod (160) and cooperating with said internal thread of said central portion, said bush having a first end close to said shutter and a second end; a return spring (230) at least partially surrounding said rod (160), intended to cause said rod (160) to move; fuse means (240) for holding said shutter (140) away from said valve seat (120) and capable of causing said return spring (230) to relax, when the temperature of the air entering through said seat (120 ) exceeds a determined value, said means cooperating with the second end of said rod (160); said protection valve being characterized in that said return spring (203) is, in the compressed state, at least partially contained inside said adjustment sleeve (200), the first end of said adjustment sleeve ( 200) comprising a flange (202), serving to support one end of said return spring (230), when it is released, the other end of said spring being integral with the second end of the rod, whereby all of the length of the sleeve is used to accommodate the spring. Soupape selon la revendication 1, caractérisée en ce que lesdits moyens de support (170) de l'extrémité libre de ladite tige (160) comportent un croisillon.Valve according to claim 1, characterized in that said support means (170) of the free end of said rod (160) have a cross. Soupape selon la revendication 1 ou 2, caractérisée en ce que lesdits moyens formant fusible (240) comprennent : une première patte (250) fixée sur la surface externe de ladite douille de réglage (200) ; une seconde patte (260) fixée à ladite tige et située plus près de l'extrémité libre de ladite tige que lesdits moyens de butée mécaniques (180) ; et un élément (300) fusible destiné à relier ladite première (250) et ladite seconde patte (260) de manière à comprimer ledit ressort de rappel, ledit élément fusible (300) étant susceptible de fondre lorsque la température de l'air entrant dans ledit corps de soupape est supérieure à une température déterminée. Valve according to claim 1 or 2, characterized in that said fuse means (240) comprise: a first tab (250) fixed to the outer surface of said adjusting sleeve (200); a second tab (260) fixed to said rod and located closer to the free end of said rod than said mechanical stop means (180); and a fusible element (300) intended to connect said first (250) and said second tab (260) so as to compress said return spring, said fusible element (300) being capable of melting when the temperature of the air entering said valve body is higher than a specified temperature. Soupape selon la revendication 3, caractérisée en ce que l'élément fusible comprend deux pièces non fusibles munies chacune d'un trou pour recevoir une desdites pattes, lesdites deux pièces étant reliées entre elles par un matériau susceptible de fondre à ladite température prédéterminée.Valve according to claim 3, characterized in that the fusible element comprises two non-fusible parts each provided with a hole for receiving one of said legs, said two parts being connected between them by a material capable of melting at said temperature predetermined. Soupape selon la revendication 1, caractérisé en ce que lesdits moyens formant fusible (240) comprennent : un couvercle (500) sur lequel s'appuie l'extrémité libre de ladite tige (160) et destiné à fermer au moins partiellement l'ouverture de ladite douille de réglage (200) orientée face à ladite gaine d'aération (G) ; des moyens de fixation temporaire dudit couvercle sur l'extrémité ouverte de ladite tige, lesdits moyens de fixation étant susceptibles de céder lorsque la température de l'air pénétrant dans ledit siège de soupape dépasse une température déterminée. Valve according to claim 1, characterized in that said fuse means (240) comprise: a cover (500) on which the free end of said rod (160) rests and intended to at least partially close the opening of said adjustment sleeve (200) oriented facing said ventilation duct (G); means for temporarily fixing said cover on the open end of said rod, said fixing means being liable to fail when the temperature of the air entering said valve seat exceeds a determined temperature. Soupape selon l'une quelconque des revendications 1 à 5, caractérisée en ce que, en position comprimée, ledit ressort est entièrement contenu dans ladite douille.Valve according to any one of Claims 1 to 5, characterized in that, in the compressed position, said spring is entirely contained in said socket. Soupape selon la revendication 6, caractérisée en ce que lorsque le ressort est comprimé, la deuxième extrémité de la douille est obturée.Valve according to claim 6, characterized in that when the spring is compressed, the second end of the sleeve is closed. Soupape selon la revendication 5, caractérisée en ce que lesdits moyens de fixation dudit couvercle comporte une pièce (600) munie d'une surface de fixation (602) montée sur ladite douille de réglage à sa deuxième extrémité, ledit couvercle (500) étant fixé sur ladite surface de fixation par un matériau adhésif (700) susceptible de fondre à une température déterminée.Valve according to claim 5, characterized in that said means for fixing said cover comprises a part (600) provided with a fixing surface (602) mounted on said adjustment sleeve at its second end, said cover (500) being fixed on said surface fixing by an adhesive material (700) capable of melting at a determined temperature. Soupape selon la revendication 8, caractérisé en ce que ladite pièce (600) est formée par un écrou apte à coopérer avec le filetage de ladite douille de réglage (200) et définissant ladite surface de fixation.Valve according to claim 8, characterized in that said piece (600) is formed by a nut capable of cooperating with the thread of said adjusting sleeve (200) and defining said fixing surface. Soupape selon l'une quelconque des revendications 5, 8 et 9 caractérisée en ce que ledit couvercle (500) recouvre entièrement ladite ouverture de ladite douille de réglage (200).Valve according to any one of claims 5, 8 and 9 characterized in that said cover (500) completely covers said opening of said adjustment sleeve (200).
EP00400433A 1999-02-17 2000-02-16 Fire protection valve Expired - Lifetime EP1029558B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9901911A FR2789745B1 (en) 1999-02-17 1999-02-17 FIRE PROTECTION VALVE
FR9901911 1999-02-17

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EP1029558A1 true EP1029558A1 (en) 2000-08-23
EP1029558B1 EP1029558B1 (en) 2006-01-18

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DE (1) DE60025577T2 (en)
ES (1) ES2255951T3 (en)
FR (1) FR2789745B1 (en)

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EP3372914A3 (en) * 2017-02-17 2018-12-12 FläktGroup Sweden AB Ventilation valve and method for measuring air flow from the ventilation valve
CN109185520A (en) * 2018-11-06 2019-01-11 陈开兵 A kind of fireproof check valve for combined flue
CN113217674A (en) * 2021-04-09 2021-08-06 东莞市金尔来电子科技有限公司 Valve gate

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EP3372914A3 (en) * 2017-02-17 2018-12-12 FläktGroup Sweden AB Ventilation valve and method for measuring air flow from the ventilation valve
CN109185520A (en) * 2018-11-06 2019-01-11 陈开兵 A kind of fireproof check valve for combined flue
CN109185520B (en) * 2018-11-06 2024-05-07 陈开兵 Combined type flue fireproof check valve
CN113217674A (en) * 2021-04-09 2021-08-06 东莞市金尔来电子科技有限公司 Valve gate

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FR2789745B1 (en) 2001-05-04
ES2255951T3 (en) 2006-07-16
DE60025577D1 (en) 2006-04-06
DE60025577T2 (en) 2006-09-14
EP1029558B1 (en) 2006-01-18
ATE315952T1 (en) 2006-02-15
FR2789745A1 (en) 2000-08-18

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