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WO1994022535A1 - Clapets coupe-feu - Google Patents

Clapets coupe-feu Download PDF

Info

Publication number
WO1994022535A1
WO1994022535A1 PCT/GB1994/000746 GB9400746W WO9422535A1 WO 1994022535 A1 WO1994022535 A1 WO 1994022535A1 GB 9400746 W GB9400746 W GB 9400746W WO 9422535 A1 WO9422535 A1 WO 9422535A1
Authority
WO
WIPO (PCT)
Prior art keywords
fire
foam
fire resistant
polymer
syntactic foam
Prior art date
Application number
PCT/GB1994/000746
Other languages
English (en)
Inventor
Bernard Deryck Baines
Original Assignee
Howden Buffalo Calidair Division
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 Howden Buffalo Calidair Division filed Critical Howden Buffalo Calidair Division
Publication of WO1994022535A1 publication Critical patent/WO1994022535A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C2/00—Fire prevention or containment
    • A62C2/06—Physical fire-barriers

Definitions

  • This invention relates to fire dampers, to fire damper elements, and to other fire resistant elements.
  • Fire dampers for use in conduits and ducting systems employed in chemical and other manufacturing plants.
  • Fire dampers provide controllable means for preventing or inhibiting the spread of fire through ducting.
  • the invention may well be applicable in the form of other fire resistant elements to other applications in which an element is required to have fire and/or thermal resistance properties.
  • a fire resistant element comprising syntactic foam.
  • syntactic foam refers to the foamed structure of the foam material, and not to the chemical nature of the polymer, if any, which is incorporated therein.
  • Syntactic foams applicable for the purposes of the invention contain dispersed bubble elements introduced from an external source, as opposed to the more usual means for producing a foam employing, for example, two reagents which react to produce gas bubbles within the material, and thus the foaming effect.
  • the syntactic foam is a material obtainable from Alderley Holdings of Wotton-Under-Edge, Gloucester, United Kingdom under the trade mark CONTRATHERM.
  • the material is more fully described in UK patent application number GB 9312926.0 to which reference is hereby directed and the contents of which are hereby incorporated in the present application for purposes of disclosure.
  • the syntactic foam is produced by the mixture of two reagent materials referred to as parts A and B.
  • Part A comprises a dispersion of inert refractory fillers and hollow glass icrospheres in an aqueous solution of phenol formaldehyde resins, modified with phosphate triesters, and wetting agents.
  • Part B comprises a dispersion of boric acid in an aqueous solution of partial orthophosphate ester and ortho phosphoric acid and triflic acid.
  • a foam By introducing the bubbles or bubble elements (in the form of glass spheres) in this non chemical way, a foam can be produced having a very regular foam structure. Moreover, this material effectively has the desirable gas insulation space actually built into its structure, whereby this generally uniform material can be employed in place of the multiple laminate structures previously proposed for fire resistant elements, in a very simple way.
  • a fire resistant element having no conventional air gaps, and yet which provides excellent fire resistant properties, with physical strength even when hot, and able to withstand temperatures up to, for example, 1100 degrees celsius.
  • the use of this material in processes for the manufacture of fire dampers and other fire resistant elements is a great simplification.
  • the foamed material can be provided in a consistency comparable to that of mastic, and thus can be squeezed out or extruded into a required location.
  • the foam sets in due course to form a generally rigid structure.
  • the foam can be incorporated, if desired, into a suitable outer casing or envelope, for example of a phenolic resin.
  • the body of the fire damper is formed of the syntactic foam.
  • An envelope of composite material defines a cavity which is substantially filled with the foam.
  • the composite material may comprise a resin reinforced with glass or ceramic fibres.
  • the syntactic foam forms the entire substance of the main body of the fire damper element, without using an outer envelope.
  • outer envelope may comprise other resins than phenolic polymers.
  • the space defined within the envelope is simply filled by extruding the syntactic foam into the envelope until it fills it, and then subsequently the foam sets after the passage of an interval of time.
  • syntactic foam is to be employed to form substantially the entire body of the fire damper element, then it is moulded to the appropriate shape and allowed to set before removal from the mould.
  • mechanical movement of the fire damper element may be carried out by means of a shaft extending through or adjacent the element and having radial spaced arms to transmit torque to the element.
  • the fire damper element may be in the form of a single angularly movable element, for example a disc, mounted in the manner of a butterfly valve element to open and close a duct.
  • a series of fire damper elements cooperate to open and close a duct by means of angular movement, usually through 90 degrees between the fully open and fully closed positions.
  • an intu escent material may be provided in the zones where the fire damper elements cooperate in their closed configuration.
  • the syntactic foam material has unexpectedly advantageous thermal properties in terms of physical strength and fire resistance at high temperatures.
  • the material has been found to be resistant to temperatures up to 1100 degrees Celsius.
  • the combination of the syntactic foam with the phenolic resin envelope, the assembly having a thickness of 50 millimetres, has better thermal resistance than a 75 millimetre thickness phenolic envelope over currently available ceramic fibre material protected by a 5 millimetre layer of two-pack intumescent material. It can thus be seen that the syntactic foam provides a major improvement in performance.
  • the intumescent material is as described in Austrian patent application number AT-1790-91.
  • the intrinsically intumescent polymer comprises partial phosphate esters of carbonific polyols which are reacted with methanol functional amino-resins.
  • Phenolic resins have been known to have thermal properties including temperature resistance which is somewhat better than polymers based on aliphatic monomers, but the above-identified thermal properties of the syntactic foam are so markedly better than would have been expected on this basis that the use of the material in fire dampers represents a very significant technical advance.
  • Fig 1 shows a section through a duct and associated fire damper assembly as viewed in the direction of the axes of rotation of the fire damper elements;
  • Fig 2 shows, on a larger scale, a section through one of the fire damper elements of Fig 1;
  • Fig 3 shows details of the internal structure of the fire damper element of Fig 2 ;
  • Fig 4 shows a modification of the structures shown in Figs 1 and 2;
  • Fig 5 shows details of a modified sealing arrangement
  • Figs 6 and 7 show further modified sealing arrangements.
  • a fire damper assembly 10 is mounted in a rectangular section duct 12 and comprises fire damper elements 14, 16 and 18 rotatable about respective axes 20, 22 and 24 between the closed position shown in Fig 1, and an open position in which the lengthwise axes of the cross- sectional profiles of the elements as seen in Fig 1 extend parallel to the axis 26 of duct 12.
  • each fire damper element comprises a casing 28 having the profile seen in Fig 2 comprising a convex nose 30, a concave tail 32, parallel side faces 34, 36 and upper and lower end walls 38 in which are fixed respective shafts 40 whereby the fire damper elements are rotatable about their respective axes, as mentioned above.
  • Duct 12 may be formed at locations 42, 44 with suitable profiles to cooperate with the nose 30 of fire damper element 14, and the tail 32 of fire damper element 18 respectively.
  • Each fire damper element has contained within casing 28 and end walls 38, a body of syntactic foam 46 which substantially fills the casing and has set therein to a substantially rigid mass having the requisite fire resistance properties.
  • the foam 46 is introduced into casing 28 by a simple extrusion technique.
  • the syntactic foam is the same material which is described earlier in this application in terms of its source and availability together with details of its manufacture using a mixture of two reagents.
  • the syntactic foam material may contain varying amounts of bubble elements dispersed in the material which contains the bubble elements.
  • This latter material may be a fire resistant resin, but other materials are contemplated.
  • Figs 4 to 7 show details of sealing arrangements for the fire dampers.
  • Fig 4 largely corresponds to that described above in relation to Figs 1 and 2, but is provided with an intumescent gel-coat 50 having end recesses 52 to accommodate mechanical seals, as described below.
  • the internal structure of fire damper element 54 is substantially as described above.
  • the sealing arrangement for the co ⁇ operating fire damper elements 54, 56 comprises a brush or lip-type seal element 58 fixed to fire damper element 54 in recess 52 thereof and constructed and arranged to sealingly co-operate with the concave portion 60 of the profile thereof, on which the intumescent material 50 is likewise provided.
  • Syntactic foam fills the internal structure of the fire damper elements 54 and 56, as previously.
  • Figs 6 and 7 show further smoke seal arrangements.
  • Fig 6 illustrates the co-operation between a lip or brush type seal 62 mounted in a recess 64 of a frame structure 66 with which an end one 68 of the fire damper elements co-operates at the end at which it is a concave end shape 70.
  • Fig 7 shows the use of the intumescent material 50 in the joint 72 between a fixed structure 74 corresponding to frame structure 66, and an associated fire-resistant damper member 76.
  • the damper member or element 74 has a rectangular cross-sectional profile.
  • a smoke seal 78 is provided in a recess 80 to offer resistance to smoke movement under non fire-temperature conditions. Under fire conditions, the intumescent material 50 expands and seals the joints in all four embodiments described above.
  • damper elements are provided for use in rectangular section ducts.
  • a single damper element is employed.

Landscapes

  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fireproofing Substances (AREA)

Abstract

Clapet coupe-feu comportant une mousse syntactique moulée selon la forme appropriée pour un élément coupe-feu. La mousse comporte une résine à résistance thermique dans laquelle sont dispersés des éléments en forme de bulles que l'on introduit dans la résine à partir d'une source externe.
PCT/GB1994/000746 1993-04-07 1994-04-07 Clapets coupe-feu WO1994022535A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB939307256A GB9307256D0 (en) 1993-04-07 1993-04-07 Fire dampers
GB9307256.9 1993-04-07

Publications (1)

Publication Number Publication Date
WO1994022535A1 true WO1994022535A1 (fr) 1994-10-13

Family

ID=10733492

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/000746 WO1994022535A1 (fr) 1993-04-07 1994-04-07 Clapets coupe-feu

Country Status (2)

Country Link
GB (1) GB9307256D0 (fr)
WO (1) WO1994022535A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0630956A3 (fr) * 1993-06-23 1995-10-25 Alderley Materials Ltd Matériaux duplex et sandwich résistant au feu et enduits de protection au feu à base de mousses syntactiques légères durcissant à froid.
WO2006075045A1 (fr) * 2005-01-17 2006-07-20 Fläkt Woods AB Regulateur de gaz de combustion

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137198A (en) * 1970-10-28 1979-01-30 Sachs Carrol C Polymer-inorganic foam
GB2029419A (en) * 1978-07-27 1980-03-19 Dainichi Nippon Cables Ltd Fire-retardant Putty-like Compositions Comprising a Polymer and Metal Oxide
US4391924A (en) * 1981-09-28 1983-07-05 Goodyear Aerospace Corporation High temperature thermobarrier compositions
WO1985005113A1 (fr) * 1984-05-07 1985-11-21 Hughes Aircraft Company Composites a base de mousse syntactique renforces par des fibres et leur procede de production
GB2198039A (en) * 1986-12-04 1988-06-08 Bernard Deryck Baines Fire dampers
US4788230A (en) * 1985-09-30 1988-11-29 The Boeing Company Process for making a low density syntactic foam product and the resultant product
EP0307290A1 (fr) * 1987-09-09 1989-03-15 Hutchinson Procédé de fabrication d'une pièce de garnissage intégralement avec sa barrière anti-feu
FR2646432A1 (fr) * 1989-04-28 1990-11-02 Poudres & Explosifs Ste Nale Mousse syntactique thermostable
WO1993005118A1 (fr) * 1991-09-09 1993-03-18 Chemische Fabrik Budenheim Rudolf A. Oetker Composition a proprietes d'intumescence integrees

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137198A (en) * 1970-10-28 1979-01-30 Sachs Carrol C Polymer-inorganic foam
GB2029419A (en) * 1978-07-27 1980-03-19 Dainichi Nippon Cables Ltd Fire-retardant Putty-like Compositions Comprising a Polymer and Metal Oxide
US4391924A (en) * 1981-09-28 1983-07-05 Goodyear Aerospace Corporation High temperature thermobarrier compositions
WO1985005113A1 (fr) * 1984-05-07 1985-11-21 Hughes Aircraft Company Composites a base de mousse syntactique renforces par des fibres et leur procede de production
US4788230A (en) * 1985-09-30 1988-11-29 The Boeing Company Process for making a low density syntactic foam product and the resultant product
GB2198039A (en) * 1986-12-04 1988-06-08 Bernard Deryck Baines Fire dampers
EP0307290A1 (fr) * 1987-09-09 1989-03-15 Hutchinson Procédé de fabrication d'une pièce de garnissage intégralement avec sa barrière anti-feu
FR2646432A1 (fr) * 1989-04-28 1990-11-02 Poudres & Explosifs Ste Nale Mousse syntactique thermostable
WO1993005118A1 (fr) * 1991-09-09 1993-03-18 Chemische Fabrik Budenheim Rudolf A. Oetker Composition a proprietes d'intumescence integrees

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0630956A3 (fr) * 1993-06-23 1995-10-25 Alderley Materials Ltd Matériaux duplex et sandwich résistant au feu et enduits de protection au feu à base de mousses syntactiques légères durcissant à froid.
WO2006075045A1 (fr) * 2005-01-17 2006-07-20 Fläkt Woods AB Regulateur de gaz de combustion
NO340152B1 (no) * 2005-01-17 2017-03-13 Flaekt Woods Ab Røykspjeld

Also Published As

Publication number Publication date
GB9307256D0 (en) 1993-06-02

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