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WO1991009648A1 - Fire barrier net - Google Patents

Fire barrier net Download PDF

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Publication number
WO1991009648A1
WO1991009648A1 PCT/FR1990/000954 FR9000954W WO9109648A1 WO 1991009648 A1 WO1991009648 A1 WO 1991009648A1 FR 9000954 W FR9000954 W FR 9000954W WO 9109648 A1 WO9109648 A1 WO 9109648A1
Authority
WO
WIPO (PCT)
Prior art keywords
net
elements
screen
filiform elements
flammable
Prior art date
Application number
PCT/FR1990/000954
Other languages
French (fr)
Inventor
Fernand Plantefeve
Original Assignee
S.A. Delobelle
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by S.A. Delobelle filed Critical S.A. Delobelle
Publication of WO1991009648A1 publication Critical patent/WO1991009648A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/02—Fire prevention, containment or extinguishing specially adapted for particular objects or places for area conflagrations, e.g. forest fires, subterranean fires
    • A62C3/0257—Fire curtains, blankets, walls, fences
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04G—MAKING NETS BY KNOTTING OF FILAMENTARY MATERIAL; MAKING KNOTTED CARPETS OR TAPESTRIES; KNOTTING NOT OTHERWISE PROVIDED FOR
    • D04G1/00—Making nets by knotting of filamentary material

Definitions

  • the present invention relates to a screen against the spread of fires, in particular forest fires; it concerns in particular a screen which can be easily transported to the place of the fire and installed by fire-fighting teams to circumscribe the outbreak or protect a specific area.
  • French patent N ° 924.016 describes a screen made up of a metallic canvas in contact with the ground; it is specified there that the conductivity of the metallic fabric prevents any appreciable caloric transport from one side to the other of the screen and will stop the transmission of the fire, that the height will be two meters fifty and that the metallic fabric is used in the form of elements capable of being transported in the form of rolls of relatively low weight and capable of being carried by human arm. These elements include the wire mesh itself and the frame on which it is stretched, namely stakes connected by metal wires.
  • U.S. Patent No. 3,635,290 describes a screen made of fabrics, the lower edge of which is secured to the ground and the lower edge held by hot air balloons, so that the screen forms a veil inflated by the wind and hot air from the fire.
  • the fabric is made of fire-resistant material, for example aluminized asbestos.
  • the object which the applicant has set for himself is to propose a fire screen which overcomes the drawbacks of known devices, and in particular which is light, easy to transport and to install, without having the rigidity of the metallic canvas, and which resists strong winds without acting as a veil or requiring special reinforcements.
  • the fire screen according to the invention which consists of a net, weighing less than 250g / m 2 and which is made of a flexible and non-flammable material.
  • net denotes an openwork network obtained by the interweaving of filiform elements.
  • the filiform elements are made of a flexible material, that is to say which, after having been folded or rolled up, regains its initial shape. They are preferably textile yarns.
  • the filiform elements are non-flammable, that is to say that in contact with a flame they must not ignite in their turn. For this, one uses either naturally non-flammable materials such as glass fibers or chlorofibres, or materials which are in themselves inflammable but which are impregnated or coated with a flame retardant finish, so that the filiform elements are made non-flammable. .
  • the confection of the net is carried out by any appropriate technique, making it possible to link the filiform elements together at each intersection.
  • the net consists of first filiform elements forming a warp and comprising several braided threads and second filiform elements forming a weft and inserted into the first elements during braiding.
  • This particular constitution of the net ensures good resistance to deformation on the screen.
  • certain filiform elements and in particular the second elements filiforms of this preferred mode consist of several threads, not twisted together.
  • the volume occupied by said filiform elements is greater and the stopping power of the screen is improved.
  • Each mesh of the net preferably occupies an average surface of the order of 0.25 cm 2 .
  • the screen net 1 shown in the figure is constituted by the interlacing of parallel elements 2 forming in a way the warp of the net and parallel elements 3, perpendicular to the first, forming the frame of the net.
  • the elements 3 of the weft consist of four cotton threads not twisted between them.
  • the elements 2 of the weft consist of four cotton threads twisted together by braiding.
  • the average surface of a mesh 4 of net 1 is 0.25 cm 2 , in a square of 0.5 x 0.5 cm.
  • the net 1 thus produced weighs on the order of 150 to 200 g / cm 2 . It is impregnated in a bath containing a high concentration flame retardant, for example based on phosphate. This operation can be done continuously by padding then passing through a drying ream.
  • a high concentration flame retardant for example based on phosphate.
  • the hydrophilic nature of cotton makes it possible to apply a significant amount of flame retardant to the net, of the order of 50 to 100 g / m 2 , which gives the net its non-flammable nature.
  • the screen mesh can be in very diverse presentations, facilitating its transport and its handling on the ground: it can of course be rolled up, but it can also be stacked by successive superposed folds. This last presentation is particularly interesting. Indeed it allows deployment of the net thus folded by simply maintaining the upper edge of the net at a certain height from the ground; the net falls by its own weight and forms a screen which it is sufficient to fix to the ground, unless the lower edge of the net is previously ballasted.
  • the net 1 according to the invention can be fixed by any appropriate means either at the time of the fire, or permanently as a preventive measure around areas particularly prone to fire.
  • the invention is not limited to the embodiment which has been described by way of non-exhaustive example but covers all the variants.
  • the mode of interlacing and the binding of the filiform elements may be different from those recommended above, without departing from the scope of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Woven Fabrics (AREA)

Abstract

The screen for preventing the spread of fires, especially forest fires, consists of a net having a weight lower than 250g/m2 and formed by interlacing flexible and non-flammable filamentary elements (2, 3), particularly cotton yarn impregnated with a flame retardant finishing agent.

Description

FILET ANTI-FEU FIRE PROTECTION NET
DOMAINE TECHNIQUETECHNICAL AREA
La présente invention concerne un écran contre la propagation des incendies, notamment des incendies de forêt ; elle concerne en particulier un écran qui peut être facilement transporté sur le lieu de l'incendie et implanté par les équipes de lutte contre le feu pour circonscrire le foyer ou protéger une zone déterminée.The present invention relates to a screen against the spread of fires, in particular forest fires; it concerns in particular a screen which can be easily transported to the place of the fire and installed by fire-fighting teams to circumscribe the outbreak or protect a specific area.
TECHNIQUE ANTERIEURE On a déjà proposé des dispositifs de ce type, par exemple dans le brevet français N° 924.016 et dans le brevet américain N°3,635,290.PRIOR ART Devices of this type have already been proposed, for example in French patent N ° 924,016 and in American patent N ° 3,635,290.
Le brevet français N°924.016 décrit un écran constitué d'une toile métallique en contact avec le sol ; il y est précisé que la conductibilité de la toile métalliαue empêche tout transport calorique appréciable d'un côté à l'autre de l'écran et arrêtera la transmission du feu, que la hauteur sera de deux mètres cinquante et que la toile métallique est utilisée sous forme d'éléments susceptibles d'être transportés sous forme de rouleaux d'un poids relativement peu élevé et susceptibles d'être portés à bras d'homme. Ces éléments comprennent la toile métallique proprement dite et le cadre sur lequel elle est tendue, à savoir des piquets reliés par des fils métalliques.French patent N ° 924.016 describes a screen made up of a metallic canvas in contact with the ground; it is specified there that the conductivity of the metallic fabric prevents any appreciable caloric transport from one side to the other of the screen and will stop the transmission of the fire, that the height will be two meters fifty and that the metallic fabric is used in the form of elements capable of being transported in the form of rolls of relatively low weight and capable of being carried by human arm. These elements include the wire mesh itself and the frame on which it is stretched, namely stakes connected by metal wires.
Du fait de la densité élevée du métal et de la rigidité de la toile métallique , les éléments d'écran sont nécessairement de faible longueur , déroulés à plat sur le sol, redressés puis enclenchés l'un dans l'autre à l'aide des piquets formant le cadre. Le brevet des Etats-Unis N° 3,635,290 décrit un écran constitué par des tissus dont le bord inférieur est arrimé au sol et le bord inférieur maintenu par des ballons d'air chaud, de telle sorte que l'écran forme une voile gonflée par le vent et l'air chaud dégagé par l'incendie . Le tissu est réalisé en matériau résistant au feu par exemple en amiante aluminisé.Due to the high density of the metal and the rigidity of the wire mesh, the screen elements are necessarily short, unwound flat on the ground, straightened and then interlocked using the stakes forming the frame. U.S. Patent No. 3,635,290 describes a screen made of fabrics, the lower edge of which is secured to the ground and the lower edge held by hot air balloons, so that the screen forms a veil inflated by the wind and hot air from the fire. The fabric is made of fire-resistant material, for example aluminized asbestos.
De plus le demandeur a déjà proposé par le brevet français N°2.615.109 un dispositif antifeu dans lequel un rouleau de tissu antifeu est susceptible d'être déroulé autour d'un axe perpendiculaire à des mâts implantés dans le sol, à l'aide de poulies et de treuils. Il est prévu que la toile devra résister à des vents violents et sera éventuellement quadrillée par des renforts.In addition, the applicant has already proposed by French patent No. 2,615,109 a fire-resistant device in which a roll of fire-resistant fabric is capable of being unwound around an axis perpendicular to masts implanted in the ground, using of pulleys and winches. It is expected that the canvas will have to withstand strong winds and will eventually be gridded with reinforcements.
EXPOSE DE L'INVENTION Le but que s'est fixé le demandeur est de proposer un écran anti-feu qui pallie les inconvénients des dispositifs connus, et en particulier qui soit léger, facile à transporter et à implanter, sans avoir la rigidité de la toile métallique , et qui résiste aux vents violents sans faire office de voile ni nécessiter de renforts particuliers.PRESENTATION OF THE INVENTION The object which the applicant has set for himself is to propose a fire screen which overcomes the drawbacks of known devices, and in particular which is light, easy to transport and to install, without having the rigidity of the metallic canvas, and which resists strong winds without acting as a veil or requiring special reinforcements.
Ce but est atteint par l'écran antifeu selon l'invention qui est constitué d'un filet , d'un poids inférieur à 250g/m2 et qui est réalisé dans un matériau souple et ininflammable.This object is achieved by the fire screen according to the invention which consists of a net, weighing less than 250g / m 2 and which is made of a flexible and non-flammable material.
On désigne sous le terme filet un réseau ajouré obtenu par l'entrecroisement d'éléments filiformes.The term “net” denotes an openwork network obtained by the interweaving of filiform elements.
Dans le cas présent les éléments filiformes sont dans un matériau souple , c'est-à-dire qui,après avoir été plié ou enroulé, retrouve sa forme initiale. Il s'agit de préférence de fils textiles. Les éléments filiformes sont ininflammables , c'est-à-dire que mis en contact avec une flamme ils ne doivent pas s'enflammer à leur tour. Pour cela on utilise soit des matériaux naturellement ininflammables tels que des fibres de verre ou des chlorofibres, soit des matériaux qui sont en eux-mêmes inflammaples mais qui sont imprégnés ou enduits d'un apprêt ignifugeant , de sorte que les éléments filiformes sont rendus ininflammables.In the present case, the filiform elements are made of a flexible material, that is to say which, after having been folded or rolled up, regains its initial shape. They are preferably textile yarns. The filiform elements are non-flammable, that is to say that in contact with a flame they must not ignite in their turn. For this, one uses either naturally non-flammable materials such as glass fibers or chlorofibres, or materials which are in themselves inflammable but which are impregnated or coated with a flame retardant finish, so that the filiform elements are made non-flammable. .
La confection du filet est réalisée par toute technique appropriée , permettant de lier les éléments filiformes entre eux à chaque entrecroisement. Selon un mode préféré de réalisation , le filet est constitué de premiers éléments filiformes formant chaîne et comprenant plusieurs fils tressés et de seconds éléments filiformes formant trame et insérés dans les premiers éléments lors du tressage. Cette constitution particulière du filet assure à l'écran une bonne résistance à la déformation. Avantageusement certains éléments filiformes et notamment les seconds éléments filiformes de ce mode préféré sont constitués de plusieurs fils, non retordus entre eux. Ainsi , à poids, égal, le volume occupé par lesdits éléments filiformes est plus important et le pouvoir d'arrêt de l'écran est amélioré. Chaque maille du filet occupe de préférence une surface moyenne de l'ordre de 0,25cm2.The confection of the net is carried out by any appropriate technique, making it possible to link the filiform elements together at each intersection. According to a preferred embodiment, the net consists of first filiform elements forming a warp and comprising several braided threads and second filiform elements forming a weft and inserted into the first elements during braiding. This particular constitution of the net ensures good resistance to deformation on the screen. Advantageously certain filiform elements and in particular the second elements filiforms of this preferred mode consist of several threads, not twisted together. Thus, for equal weight, the volume occupied by said filiform elements is greater and the stopping power of the screen is improved. Each mesh of the net preferably occupies an average surface of the order of 0.25 cm 2 .
BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS
D'autres avantages et caractéristiques de la présente invention apparaîtront plus clairement à la lecture de la description qui va être faite d'un exemple de réalisation d'un filet antifeu dans lequel la figure unique est une vue schématique en plan d'un bord de l'écran.Other advantages and characteristics of the present invention will appear more clearly on reading the description which will be given of an embodiment of a fire-resistant net in which the single figure is a schematic plan view of an edge of the screen.
MEILLEURE MANIERE DE REALISER L'INVENTIONBEST WAY TO IMPLEMENT THE INVENTION
Le filet-écran 1 représenté sur la figure est constitué par l'entrecroisement d'éléments parallèles 2 formant en quelque sorte la chaîne du filet et d'éléments parallèles 3, perpendiculaires aux premiers , formant la trame du filet.The screen net 1 shown in the figure is constituted by the interlacing of parallel elements 2 forming in a way the warp of the net and parallel elements 3, perpendicular to the first, forming the frame of the net.
Les éléments 3 de la trame consistent en quatre fils de coton non retordus entre eux. Les éléments 2 de la trame consistent en quatre fils de coton retordus entre eux par tressage.The elements 3 of the weft consist of four cotton threads not twisted between them. The elements 2 of the weft consist of four cotton threads twisted together by braiding.
La surface moyenne d'une maille 4 du filet 1 est de 0,25cm2, selon un carré de 0,5 x 0,5cm.The average surface of a mesh 4 of net 1 is 0.25 cm 2 , in a square of 0.5 x 0.5 cm.
La réalisation d'un tel entrecroisement de fils ne sera pas décrite ici, étant classique en particulier en passementerie. Il est à noter que certains fils unitaires peuvent faire partie successivement d'un élément 2 de chaîne puis d'un élément de trameThe realization of such a criss-crossing of threads will not be described here, being conventional in particular in trimmings. It should be noted that certain unitary threads can be successively part of a warp element 2 and then of a weft element
3.3.
Le filet 1 ainsi réalisé pèse de l'ordre de 150 à 200g/cm2. Il est imprégné dans un bain contenant un agent ignifugeant à forte concentration, par exemple à base de phosphate. Cette opération peut être faite à la continue par foulardage puis passage dans une rame de séchage.The net 1 thus produced weighs on the order of 150 to 200 g / cm 2 . It is impregnated in a bath containing a high concentration flame retardant, for example based on phosphate. This operation can be done continuously by padding then passing through a drying ream.
Le caractère hydrophile du coton permet d'appliquer sur le filet une quantité importante d'agent ignifugeant, de l'ordre de 50 à 100g/m2, qui confère au filet son caractère ininflammable.The hydrophilic nature of cotton makes it possible to apply a significant amount of flame retardant to the net, of the order of 50 to 100 g / m 2 , which gives the net its non-flammable nature.
Grâce à la souplesse des éléments qui le composent, le filet-écran peut être dans des présentations très diverses, facilitant son transport et sa manipulation sur le terrain : il peut bien sûr être enroulé , mais il peut aussi être empilé par plis superposés successifs. Cette dernière présentation est particulièrement intéressante. En effet elle permet un déploiement du filet ainsi plié en maintenant simplement le bord supérieur du filet à une certaine hauteur du sol ; le filet tombe par son propre poids et forme un écran qu'il suffit de fixer au sol , à moins que le bord inférieur du filet ne soit préalablement lesté. Lors des essais de simulation d'incendie réalisés avec le filet 1 décrit ci-dessus, on a constaté que les éléments filiformes 2,3 constitutifs du filet se dégradent sans s'enflammer, empêchant la propagation de la flamme d'un côté de l'écran vers l'autre côté , que les brindilles enflammées se collent préférentiellement sur le filet et ne passent pour ainsi dire pas à travers ses mailles , et que le filet 1 résiste à des vents violents, du fait que ceux-ci passent à travers les jours du filet.Thanks to the flexibility of its components, the screen mesh can be in very diverse presentations, facilitating its transport and its handling on the ground: it can of course be rolled up, but it can also be stacked by successive superposed folds. This last presentation is particularly interesting. Indeed it allows deployment of the net thus folded by simply maintaining the upper edge of the net at a certain height from the ground; the net falls by its own weight and forms a screen which it is sufficient to fix to the ground, unless the lower edge of the net is previously ballasted. During the fire simulation tests carried out with the net 1 described above, it was found that the filiform elements 2,3 constituting the net degrade without igniting, preventing the propagation of the flame on one side of the screen towards the other side, that the inflamed twigs preferentially stick to the net and do not pass, so to speak, through its meshes, and that the net 1 resists strong winds, because these pass through the days of the net.
Le filet 1 selon l'invention peut être fixé par tous moyens appropriés soit au moment même de l'incendie, soit de manière permanente à titre préventif autour de zones particulièrement sujettes aux incendies.The net 1 according to the invention can be fixed by any appropriate means either at the time of the fire, or permanently as a preventive measure around areas particularly prone to fire.
L'invention n'est pas limitée au mode de réalisation qui a été décrit à titre d'exemple non exhaustif mais en couvre toutes les variantes. En particulier le mode d'entrecroisement et le liage des éléments filiformes peuvent être différents de ceux préconisés ci-dessus, sans sortir du cadre de la présente invention. The invention is not limited to the embodiment which has been described by way of non-exhaustive example but covers all the variants. In particular, the mode of interlacing and the binding of the filiform elements may be different from those recommended above, without departing from the scope of the present invention.

Claims

REVENDICATIONS
1. Ecran contre la propagation des incendies caractérisé en ce qu'il est constitué d'un filet , d'un poids inférieur à 250g/cm2, réalisé par l'entrecroisement d'éléments filiformes (2, 3) souples et ininflammables. 1. Screen against the spread of fire characterized in that it consists of a net, weighing less than 250g / cm 2 , produced by the interweaving of filiform elements (2, 3) flexible and non-flammable.
2. Ecran selon la revendication 1 caractérisé en ce que les éléments filiformes (2, 3) sont dans un matériau rendu ininflammable grâceà un apprêt ignifugeant.2. Screen according to claim 1 characterized in that the filiform elements (2, 3) are made of a material made non-flammable thanks to a flame retardant finish.
3. Ecran selon l'une des revendications 1 ou 2 caractérisé en ce que chaque maille (4) du filet occupe une surface moyenne de l'ordre de 0,25cm2.3. Screen according to one of claims 1 or 2 characterized in that each mesh (4) of the net occupies an average surface of the order of 0.25 cm 2 .
4. Ecran selon la revendication 1 caractérisé en ce que le filet est constitué de premiers éléments filiformes (2) formant chaîne et comprenant plusieurs fils tressés et de seconds éléments filiformes (3) formant trame et insérés dans les premiers éléments (2) lors du tressage.4. Screen according to claim 1 characterized in that the net consists of first filiform elements (2) forming a warp and comprising several braided threads and second filiform elements (3) forming a weft and inserted into the first elements (2) during braiding.
5. Ecran selon la revendication 4 caractérisé en ce que les seconds éléments filiformes (3) sont constitués de plusieurs fils non retordus entre eux.5. Screen according to claim 4 characterized in that the second filiform elements (3) consist of several son not twisted together.
6. Ecran selon la revendication 2 caractérisé en ce que les éléments filiformes sont en coton rendu ininflammable par un apprêt phosphaté ignifuge , a raison de 50 à 100g d'apprêt/m2. 6. Screen according to claim 2 characterized in that the filiform elements are made of cotton made non-flammable by a flame retardant phosphate finish, at a rate of 50 to 100 g of finish / m 2 .
PCT/FR1990/000954 1990-01-03 1990-12-28 Fire barrier net WO1991009648A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000188A FR2656533B1 (en) 1990-01-03 1990-01-03 FIRE PROTECTION NET.
FR90/00188 1990-01-03

Publications (1)

Publication Number Publication Date
WO1991009648A1 true WO1991009648A1 (en) 1991-07-11

Family

ID=9392610

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1990/000954 WO1991009648A1 (en) 1990-01-03 1990-12-28 Fire barrier net

Country Status (4)

Country Link
EP (1) EP0461234A1 (en)
CA (1) CA2048600A1 (en)
FR (1) FR2656533B1 (en)
WO (1) WO1991009648A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605586A (en) * 1985-07-01 1986-08-12 Globe International Inc. Fire resistant oil spill barrier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4605586A (en) * 1985-07-01 1986-08-12 Globe International Inc. Fire resistant oil spill barrier

Also Published As

Publication number Publication date
FR2656533A1 (en) 1991-07-05
FR2656533B1 (en) 1992-05-07
EP0461234A1 (en) 1991-12-18
CA2048600A1 (en) 1991-07-04

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