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WO2006037939A1 - Couvercles ignifugés de raccords de conduits - Google Patents

Couvercles ignifugés de raccords de conduits Download PDF

Info

Publication number
WO2006037939A1
WO2006037939A1 PCT/GB2005/002619 GB2005002619W WO2006037939A1 WO 2006037939 A1 WO2006037939 A1 WO 2006037939A1 GB 2005002619 W GB2005002619 W GB 2005002619W WO 2006037939 A1 WO2006037939 A1 WO 2006037939A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
fire
foam
open
retardant
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.)
Ceased
Application number
PCT/GB2005/002619
Other languages
English (en)
Inventor
Derek Alfred Ward
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.)
Environmental Seals Ltd
Original Assignee
Environmental Seals Ltd
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 Environmental Seals Ltd filed Critical Environmental Seals Ltd
Priority to GB0708671A priority Critical patent/GB2435576B/en
Publication of WO2006037939A1 publication Critical patent/WO2006037939A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0406—Details thereof
    • H02G3/0412—Heat or fire protective means

Definitions

  • This invention relates to fireproofed covers for conduit fittings for receiving electrical cabling.
  • Flexible expandable seals comprise a preformed flexible cellular foam or sponge which has been impregnated with fire- retardant material. When subjected to temperatures of the order of 300- 400 0 C such seals lose integrity thereby allowing flames to pass between the walls or other members between which the seal is positioned.
  • Expandable seals are also known which comprise layers of sponge and intumescent sheets. The sponge content of these seals deteriorates at temperatures around 200 0 C while the sheets expand. Seal flexibility is therefore substantially lost.
  • seals comprise preformed flexible cellular fire-retardant foam or sponge coated firstly with a primer solution including a sealant and secondly with a flowable coating of a fire-retardant material. These seals offer enhanced fire protection and acoustic properties.
  • Our patent application GB 2391716 discloses a cover for a conduit fitting which comprises sheets of preformed flexible cellular fire-retardant foam joined together by an intumescent adhesive to form a cover open on one of its sides.
  • the cover defines a snug fit about an open-sided conduit fitting. Whereas this cover has proved to be successful in providing protection for the conduit fitting and the electrical cabling present within the fitting interior, problems have occasioned in effectively securing the cover to the wall in which the conduit fitting is located.
  • the present invention sets out to overcome this problem.
  • Patent US 4616104 discloses an electrical box designed to minimise the potential for sound, smoke or fire travelling therethrough when wall- mounted and has an interior rigid housing and a moulded non-combustible exterior casing.
  • the casing is a unitary, single-piece sheathing, having openings only for attachment of line conduit. Hitherto such seals have been employed in block form for use within, for example, wall cavities. It has now surprisingly been established that the fire-retardant and acoustic protection properties of the described preformed flexible cellular foam or sponge can be retained even when relatively thin sheets of this material are produced.
  • Our International Application WO 2004/013528 discloses a cover for a conduit fitting which comprises sheets of preformed flexible cellular fire- retardant foam or sponge joined together by an intumescent adhesive to form a cover open on one of its sides and dimensioned to define a reasonably snug fit about the external walls of an open-sided conduit fitting.
  • Each sheet is coated firstly with a primer solution including a sealant and secondly with a flowable coating of a fire-retardant material.
  • the primer solution operates to close the open pores of the surface and provides a bond to which the fire-retardant coating can adhere.
  • a cover for a conduit fitting for location within a wall recess which comprises sheets of preformed flexible cellular fire-retardant foam sponge joined together by an intumescent adhesive to form a cover open on one of its sides and dimensioned to define a reasonably snug fit about the external walls of an open-sided conduit fitting, and means for securing the cover to one or more of the walls which define the recess comprising metallic fixing strips which extend from and generally normal to the base of the cover and protrude from the adjoining upstanding cover wall by a predetermined distance, the protruding end including an aperture through which a pin or screw can pass to secure the cover to the neighbouring edge of a wall in which the cover is positioned, each sheet of the cover being coated firstly with a primer solution including a sealant and secondly with a flowable coating of a fire-retardant material, the primer solution operating to close the open pores of the said at least one surface and to provide a bond to which the fire-retardant
  • the securing means may comprise metallic fixing strips which extend from and generally normal to the base of the cover and protrude from the adjoining upstanding cover wall by a predetermined distance, the protruding end including an aperture through which a pin or screw can pass to secure the cover to the neighbouring edge of a wall in which the cover is positioned.
  • the predetermined distance is equivalent to the thickness of a plasterboard sheet.
  • One object of this invention is to provide a fireproofed cover for conduit fittings such as dry lining boxes which can readily be positioned between and secured to adjoining plasterboard walls of timber framed properties.
  • All surfaces of the foam or sponge sheets may be coated.
  • the primer solution may comprise an aqueous solution of an acrylic copolymer which includes ammonium polyphosphate.
  • the fire-retardant coating may comprise a chlorinated vinyl copolymer system which includes a quantity of ammonium polyphosphate, zinc borate and/or magnesium and/or calcium carbonates.
  • the foam or sponge may comprise polyurethane or alternatively a silicone coated with a silane primer.
  • the primer solution may be allowed to dry before the fire-retardant material is applied.
  • One or both coatings may be applied by brushing, rolling or spraying.
  • Figure 1 is a plan view of a fireproofed cover in accordance with the invention.
  • Figure 2 is a side view of the fireproofed cover shown in Figure 1.
  • the cover illustrated in the drawings has walls 1 upstanding from a base 2 all cut from one or more sheets of polyurethane foam material impregnated with an aqueous solution of a fire-retardant material.
  • each strip end includes a hole 4 to enable the fixing strips to be secured to the adjoining edge surface of a plasterboard or other wall surface when the cover and conduit fitting is positioned within a wall recess.
  • the ends of the fixing strip remote from the holes 4 are turned through 90° to lie between the adjoining surface of the walls and the base.
  • the walls 1 and base 2 are cut from sheets of polyurethane foam material impregnated with an aqueous solution of a fire-retardant material are coated with a solution of an acrylic copolymer system which includes ammonium polyphosphate.
  • an acrylic copolymer system which includes ammonium polyphosphate.
  • the ammonium polyphosphate forms phosphoric acid which reacts with the fire-retardant coating for the polyurethane sheets.
  • This primer coating has a viscosity similar to that of water and acts to seal the open cells of the polyurethane foam. The primer coating therefore seals the exposed surfaces of the polyurethane sheets whilst retaining the flexibility characteristics of the sheets.
  • the primer coating also provides a bond to which the subsequently applied fire retardant coating can adhere.
  • the surfaces of the sheets are then coated with one or more coatings of a chlorinated vinyl copolymer system which includes a quantity of ammonium polyphosphate, zinc borate and/or magnesium and/or calcium carbonates.
  • a chlorinated vinyl copolymer system which includes a quantity of ammonium polyphosphate, zinc borate and/or magnesium and/or calcium carbonates.
  • the viscosity of this fire-retardant coating is more akin to an emulsion or paste.
  • the coatings may be applied by means of a brush, roller or spray.
  • the primer coating not only seals the open pores of the polyurethane block but also, as mentioned previously, provides a primed surface to which the fire-retardant coating can adhere.
  • the coated sheets retain their flexibility and the bond between the respective coatings is sufficient to prevent cracking or other damage to the surface during handling of the sheets.
  • the primer coating may be preferable to allow the primer coating to dry before the fire-retardant coating is applied.
  • the sheets are cut to sizes which approximate to the dimensions of the walls of the conduit fitting to be covered.
  • the edges of the sheets are then adhered together using an intumescent adhesive to define an open-sided cover of a shape which matches the. fitting to be covered but dimensioned marginally larger to enable the fitting to fit snugly within the cover.
  • the cover is inserted through an opening in, say, a plasterboard cavity wall to which a wall socket or the like is to be mounted. If necessary, the cover can, because of its inherent flexibility, be folded or screwed up to pass through the opening.
  • the area of internal wall of the opposed plasterboard cavity wall opposite the opening is coated with a layer of intumescent adhesive to retain the cover in place between the opposed cavity wall surfaces. Openings or slots formed in the appropriate side of the cover enable electrical cabling to enter the cover interior.
  • the required conduit fitting is then located within the cover and the cover is fixed in place by pins or screws passing through the holes 4 onto the adjoining side edges of the plasterboard.
  • Covers in accordance with the invention have enhanced sound- deadening properties which enable the covers to act as acoustic covers for conduit fittings.
  • the intumescent contents of the cover, the adhesive and the pads located within the fitting expand to fill completely all spacings between the fitting and the adjoining wall surfaces and within the fitting itself to prevent the flow of fire or smoke between the adjoining rooms defined by the cavity wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Building Environments (AREA)
  • Paints Or Removers (AREA)
  • Fireproofing Substances (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Couvercle de raccord de conduit, à placer à l’intérieur d’un renfoncement de paroi, comportant des feuilles préformées souples de mousse ignifuge cellulaire jointes par un adhésif intumescent afin de former un couvercle ouvert sur un de ses côtés et dimensionné pour définir un ajustement raisonnablement serré autour des parois externes d’un raccord de conduit à côté ouvert. Des moyens fixent le couvercle à une ou plusieurs des parois définissant le renfoncement. Chaque feuille du couvercle est enduite premièrement d’une solution d’apprêt comprenant un produit d’étanchéité et deuxièmement d’un enduit fluide de matière ignifuge. La solution d’apprêt agit en fermant les pores ouverts de ladite au moins une surface et en réalisant une liaison à laquelle l’enduit ignifuge peut adhérer.
PCT/GB2005/002619 2004-10-01 2005-07-05 Couvercles ignifugés de raccords de conduits Ceased WO2006037939A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0708671A GB2435576B (en) 2004-10-01 2005-07-05 Fireproofed covers for conduit fittings

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0421839A GB2418784A (en) 2004-10-01 2004-10-01 A fire resistant cover for an electrical conduit or socket.
GB0421839.2 2004-10-01

Publications (1)

Publication Number Publication Date
WO2006037939A1 true WO2006037939A1 (fr) 2006-04-13

Family

ID=33427904

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2005/002619 Ceased WO2006037939A1 (fr) 2004-10-01 2005-07-05 Couvercles ignifugés de raccords de conduits

Country Status (2)

Country Link
GB (2) GB2418784A (fr)
WO (1) WO2006037939A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2449088B (en) * 2007-05-09 2012-03-07 V Cut Ltd Insulation device for insertion into a wall requiring insulation
EP3646922A3 (fr) * 2018-10-29 2020-07-29 Martin Elze Structure de protection contre l'incendie ou système de protection contre l'incendie permettant d'envelopper un câble ou une conduite et utilisations correspondantes
GB2582544B (en) * 2019-03-14 2022-03-30 Hoody Speaker Hoods Ltd Covers for electrical appliances
GB2583735A (en) 2019-05-07 2020-11-11 Intumescent Systems Ltd Cable trays

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616104A (en) 1984-11-16 1986-10-07 Lindsey Travis C Fire resistant electrical junction boxes
GB2247977A (en) 1990-09-12 1992-03-18 Smiths Industries Plc Display assemblies
US5498466A (en) * 1993-03-12 1996-03-12 International Protective Coatings Corp. Intumescent composite
GB2297609A (en) * 1995-01-25 1996-08-07 Environmental Seals Ltd Ventilated covers for electic fittings
EP0982522A2 (fr) * 1998-08-19 2000-03-01 Friatec Aktiengesellschaft Dispositif coupe-feu
WO2001061119A1 (fr) 2000-02-18 2001-08-23 Environmental Seals Limited Joint d'etancheite flexible
GB2391716A (en) 2002-08-02 2004-02-11 Environmental Seals Ltd Fire retardant cover for a conduit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087624A (en) * 1976-05-17 1978-05-02 Hitchcock Robert A Fire shield for electrical box
US4667840A (en) * 1984-11-16 1987-05-26 Lindsey Travis C Fire-resistant electrical junction boxes and method of manufacture
GB2277871B (en) * 1993-05-14 1997-01-15 Environmental Seals Ltd Fire resistant container
JP4268338B2 (ja) * 2001-01-10 2009-05-27 積水化学工業株式会社 埋込型ボックスの防耐火構造

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4616104A (en) 1984-11-16 1986-10-07 Lindsey Travis C Fire resistant electrical junction boxes
GB2247977A (en) 1990-09-12 1992-03-18 Smiths Industries Plc Display assemblies
US5498466A (en) * 1993-03-12 1996-03-12 International Protective Coatings Corp. Intumescent composite
GB2297609A (en) * 1995-01-25 1996-08-07 Environmental Seals Ltd Ventilated covers for electic fittings
EP0982522A2 (fr) * 1998-08-19 2000-03-01 Friatec Aktiengesellschaft Dispositif coupe-feu
WO2001061119A1 (fr) 2000-02-18 2001-08-23 Environmental Seals Limited Joint d'etancheite flexible
GB2391716A (en) 2002-08-02 2004-02-11 Environmental Seals Ltd Fire retardant cover for a conduit
WO2004013528A1 (fr) 2002-08-02 2004-02-12 Environmental Seals Ltd Revetements ignifuges pour raccords de conduits

Also Published As

Publication number Publication date
GB2418784A (en) 2006-04-05
GB2435576B (en) 2008-11-05
GB0708671D0 (en) 2007-06-20
GB0421839D0 (en) 2004-11-03
GB2435576A (en) 2007-08-29

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