WO2010094835A1 - Ventilation-duct fire damper and method - Google Patents

Ventilation-duct fire damper and method Download PDF

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Publication number
WO2010094835A1
WO2010094835A1 PCT/FI2010/050094 FI2010050094W WO2010094835A1 WO 2010094835 A1 WO2010094835 A1 WO 2010094835A1 FI 2010050094 W FI2010050094 W FI 2010050094W WO 2010094835 A1 WO2010094835 A1 WO 2010094835A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
cone
fire
closing
outer section
Prior art date
Application number
PCT/FI2010/050094
Other languages
French (fr)
Inventor
Kim HAGSTRÖM
Pekka Heino
Jarno Vuorio
Raimo Parkkila
Original Assignee
Halton Oy
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 Halton Oy filed Critical Halton Oy
Priority to EP10707309.0A priority Critical patent/EP2398563B1/en
Publication of WO2010094835A1 publication Critical patent/WO2010094835A1/en

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L5/00—Devices for use where pipes, cables or protective tubing pass through walls or partitions
    • F16L5/02—Sealing
    • F16L5/04—Sealing to form a firebreak device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/1026—Fire protection devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • F24F13/062—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser having one or more bowls or cones diverging in the flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/33—Responding to malfunctions or emergencies to fire, excessive heat or smoke
    • F24F11/35—Responding to malfunctions or emergencies to fire, excessive heat or smoke by closing air passages

Definitions

  • the invention relates to a fire damper of a ventilation duct according to the preamble of claim 1.
  • the invention also relates to a method according to the preamble of claim 7.
  • Fire dampers are usually located in a ventilation duct between two different fire compartments. Fire dampers aim at preventing fire from spreading from one fire compartment to another fire compartment.
  • Patent FI55767 describes a fire damper to be connected to a supply or exhaust air duct of a ventilation installation.
  • the fire damper has an operation which forces a valve regulating element to close the valve in the event of fire in a flow duct.
  • the valve comprises a conical collar and a conical disc fitted in the conical collar. Between the conical collar and the conical disc is formed a flow duct the cross- sectional area of which can be adjusted by moving the disc in relation to the collar in the axial direction.
  • the disc has a threaded hole in which is fitted a first end of a threaded stem. The second end of the threaded stem is connected to a bail the ends of which are fastened in the conical collar.
  • a trigger and closing mechanism of the fire damper which in the event of fire performs an automatic quick-closing of the disc against the conical collar.
  • the valve Via the bail, the valve can be fastened in a frame by rotating.
  • the frame comprises a cylindrical section to be installed in the supply or exhaust air duct and an outer flange which comes directly against a wall surface. It is possible to use a fire insulating seal between the outer flange of the frame coming against the wall surface and the conical collar of the valve.
  • Patent EP 1095672 also describes a fire damper of a ventilation installation.
  • the principal structures of the valve and the frame are here equivalent to the ones of the valve and frame of the above patent FI55767.
  • the valve is fastened to the frame via an annular piece of heat-resistant material, being castable. Said annular piece forms the only mechanical connection between the conical collar of the valve and the frame surrounding it.
  • the aim of the arrangement according to the invention is to minimise disadvantages related to prior-art arrangements or to eliminate them totally.
  • the fire damper comprises a frame extending through a hole in a wall structure installable at the end of a ventilation duct and a valve installable in the frame.
  • the frame comprises a substantially cylindrical inner section and a substantially flange-shaped outer section.
  • the valve comprises a closing cone and a counter cone between which is formed a flow duct and a trigger mechanism with which the closing cone is triggered against the counter cone for closing the flow duct in the event of fire.
  • the counter cone has a conical inner section and a split annular outer section.
  • the fire damper utilises two fire insulating seals.
  • the first fire insulating seal is located between the outer section of the counter cone of the valve and the outer section of the frame.
  • the second fire insulating seal is located between the outer section of the frame and the outer surface surrounding the hole in the wall structure and the end of the ventilation duct.
  • the fire damper according to the invention is inexpensive and simple to manufacture as well as easy to install and maintain.
  • the use of elastic, heat- resistant fire insulating seals to seal leakages is a simple and cost-effective way to prevent fire from spreading via the fire damper to other spaces.
  • the arrangement according to the invention is applicable to all wall structures.
  • the use of the second fire insulating seal between the outer section of the frame and the outer surface surrounding the hole in the wall structure and the end of the ventilation duct protects the outer surface of the wall surrounding the hole in the wall structure from chipping. For instance, the surface of a plasterboard is easily chipped when the outer section of the frame in time rubs against the plasterboard.
  • Fig. 1 shows a schematic view of a fire damper of a ventilation duct according to the invention.
  • Fig. 2 shows a trigger mechanism applicable to the fire damper according to Fig. 1 in its excited state.
  • Fig. 3 shows the trigger mechanism of Fig. 2 as triggered.
  • Fig. 1 shows a schematic view of a fire damper of a ventilation duct according to the invention.
  • the fire damper consists of a frame 10 which in connected to a ventilation duct 30 extending through a hole 40a in a wall structure 40 and of a valve 20 connected to the frame .10.
  • the valve 20 comprises a closing cone 21, a counter cone 22, a bail 23 which is fixedly connected to the counter cone 22 in a connection point A, and a stem 24 with which the closing cone 21 is movably connected to the bail 23.
  • the frame 10 of the fire damper comprises a substantially cylindrical inner section 10a and a substantially flange-shaped outer section 10b which has an inner surface and an outer surface.
  • the inner section 10a of the frame 10 sets against the inner surface of the ventilation duct 30 and the outer section 10b of the frame sets against an outer surface 40b surrounding the hole 40a in the wall structure 40 and the end of the duct 30.
  • the wall structure 40 here comprises an outer panel 41 and an inner panel 42 and an insulating layer 43 between them.
  • the frame 10 is fastened of its inner section 10a in the duct 30 with fastening means 70, e.g. screws.
  • the counter cone 22 of the valve 20 of the fire damper consists of a truncated conical inner section 22a and a split annular outer section 22b.
  • the inner section 22a sets in the ventilation duct 30 and the outer section sets against the side surface 40b surrounding the hole 40a in the wall structure 40.
  • Between the closing cone 21 and the counter cone 22 is formed a conical flow duct 26 from which air can enter the ventilation duct 30 or exit it.
  • the stem 24 advantageously consists of a threaded tap, whereby the closing cone 21 includes a nut 25 in which the threaded tap 24 sets.
  • the closing cone 21 is thus movable in the axial direction S in relation to the counter cone 22, whereby the area of the duct 26 between the closing cone 21 and the counter cone 22 is adjustable.
  • first fire insulating seal 50 Between the outer section 22b of the counter cone 22 and the outer surface of the outer section 10b of the frame 10, there is a first fire insulating seal 50. Between the inner surface of the outer section 10b of the frame 10 and the side surface 40b surrounding the hole 40a in the wall structure 40 and the end of the duct 30, there is a second fire insulating seal 51. These seals 50, 51 are located in the axial direction S opposite each other on both sides of the outer section 10b of the frame 10. Both fire insulating seals 50, 51 consist of an elastic material resistant to high temperatures, an example of which is the insulating material marketed with trademark Kerafix 2000 owned by a company called Trader-Koo Oy. The wall lead-in of the ventilation duct 30 is also sealed properly against the spreading of fire.
  • the valve 20 can be fastened in the frame 10 by rotating such that slightly outwards deflected ends 23 a of the bail 23 set against stoppers 10c in the inner section 10a of the frame 10.
  • the stoppers 10c are advantageously designed such that rotating the valve 20 to the frame 10 simultaneously presses down the first fire insulating seal 50 within the outer section 22b of the counter cone 22 tightly against the outer section 10a of the frame 10.
  • the valve 20 thus supports itself to the frame 10 via two support locations at a distance from each other in the axial direction S.
  • the first support location is formed of two support points between the ends 23a of the bail 23 and the inner section 10a of the frame.
  • the second support location is formed via a circular support point formed by the first fire insulating seal 50 between the outer section 22b of the counter cone 22 and the outer section 10b of the frame 10.
  • Fig. 2 shows a trigger mechanism applicable to the fire damper according to Fig. 1 in its excited state
  • Fig. 3 shows the trigger mechanism as triggered.
  • This trigger mechanism is known as such from the above patent FI55767.
  • the trigger mechanism 60 comprises a diaphragm spring 61 installed around the threaded tap 24, which supports itself of its one end to the end of the threaded tap 24 in a washer 62 fastened e.g. with a pin and of its other end on the inner surface of a bottom 21a of the closing cone 21.
  • the trigger mechanism 60 also comprises a flange 63 fastened onto the outer surface of the bottom 21a of the closing cone 21 e.g. with rivets 65, which includes a formed part 64 closing the nut 25 within itself.
  • the nut 25 is fastened in the formed part 64 of the flange 63 with a solder joint 66 which forms a fuse melting in a specific temperature.
  • the diaphragm spring 61 is pressed down and ready to trigger the fire damper as soon as the fuse 66 has melted.
  • Figs. 2 and 3 show a trigger mechanism applicable to the fire damper according to the invention but, from the viewpoint of the invention, it is possible to use any trigger mechanism known by those skilled in the art.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Air-Flow Control Members (AREA)

Abstract

The fire damper comprises a frame (10) which includes a cylindrical inner section (10a) and a flange-shaped outer section (10b) which has an inner surface and an outer surface. The fire damper further comprises a valve (20), which includes a closing cone (21) and a counter cone (22) as well as a flow duct (26) between them, and a trigger mechanism (60) with which the flow duct (26) is closed in the event of fire. The fire damper additionally comprises a first fire insulating seal (50) which is fastened within an outer section (22b) of the counter cone (22) and a second fire insulating seal (51) which is fastened on the inner surface of the outer section (10b) of the frame (10).

Description

Ventilation-duct fire damper and method
FIELD OF INVENTION
The invention relates to a fire damper of a ventilation duct according to the preamble of claim 1.
The invention also relates to a method according to the preamble of claim 7.
PRIOR ART
Fire dampers are usually located in a ventilation duct between two different fire compartments. Fire dampers aim at preventing fire from spreading from one fire compartment to another fire compartment.
Patent FI55767 describes a fire damper to be connected to a supply or exhaust air duct of a ventilation installation. The fire damper has an operation which forces a valve regulating element to close the valve in the event of fire in a flow duct. The valve comprises a conical collar and a conical disc fitted in the conical collar. Between the conical collar and the conical disc is formed a flow duct the cross- sectional area of which can be adjusted by moving the disc in relation to the collar in the axial direction. The disc has a threaded hole in which is fitted a first end of a threaded stem. The second end of the threaded stem is connected to a bail the ends of which are fastened in the conical collar. Within the disc is arranged a trigger and closing mechanism of the fire damper which in the event of fire performs an automatic quick-closing of the disc against the conical collar. Via the bail, the valve can be fastened in a frame by rotating. The frame comprises a cylindrical section to be installed in the supply or exhaust air duct and an outer flange which comes directly against a wall surface. It is possible to use a fire insulating seal between the outer flange of the frame coming against the wall surface and the conical collar of the valve.
Patent EP 1095672 also describes a fire damper of a ventilation installation. The principal structures of the valve and the frame are here equivalent to the ones of the valve and frame of the above patent FI55767. The valve is fastened to the frame via an annular piece of heat-resistant material, being castable. Said annular piece forms the only mechanical connection between the conical collar of the valve and the frame surrounding it.
SUMMARY OF INVENTION
The aim of the arrangement according to the invention is to minimise disadvantages related to prior-art arrangements or to eliminate them totally.
The principal characteristics of a fire damper of a ventilation duct according to the invention are presented in the characterising part of claim 1.
The principal characteristics of a method according to the invention are presented in the characterising part of claim 7.
Other characteristics of the invention are presented in the dependent claims.
The fire damper according to the invention comprises a frame extending through a hole in a wall structure installable at the end of a ventilation duct and a valve installable in the frame. The frame comprises a substantially cylindrical inner section and a substantially flange-shaped outer section. The valve comprises a closing cone and a counter cone between which is formed a flow duct and a trigger mechanism with which the closing cone is triggered against the counter cone for closing the flow duct in the event of fire. The counter cone has a conical inner section and a split annular outer section. The fire damper utilises two fire insulating seals. The first fire insulating seal is located between the outer section of the counter cone of the valve and the outer section of the frame. The second fire insulating seal is located between the outer section of the frame and the outer surface surrounding the hole in the wall structure and the end of the ventilation duct.
The fire damper according to the invention is inexpensive and simple to manufacture as well as easy to install and maintain. The use of elastic, heat- resistant fire insulating seals to seal leakages is a simple and cost-effective way to prevent fire from spreading via the fire damper to other spaces.
The arrangement according to the invention is applicable to all wall structures.
The use of the second fire insulating seal between the outer section of the frame and the outer surface surrounding the hole in the wall structure and the end of the ventilation duct protects the outer surface of the wall surrounding the hole in the wall structure from chipping. For instance, the surface of a plasterboard is easily chipped when the outer section of the frame in time rubs against the plasterboard.
Then, a leakage can be created between the frame and the plasterboard, due to which the fire damper will not form a fire blockage as tight as required.
The invention will now be described with reference to the figures of the accompanying drawings.
BRIEF DESCRIPTION OF FIGURES
Fig. 1 shows a schematic view of a fire damper of a ventilation duct according to the invention.
Fig. 2 shows a trigger mechanism applicable to the fire damper according to Fig. 1 in its excited state. Fig. 3 shows the trigger mechanism of Fig. 2 as triggered.
DESCRIPTION OF ADVANTAGEOUS EMBODIMENTS
Fig. 1 shows a schematic view of a fire damper of a ventilation duct according to the invention.
The fire damper consists of a frame 10 which in connected to a ventilation duct 30 extending through a hole 40a in a wall structure 40 and of a valve 20 connected to the frame .10. The valve 20 comprises a closing cone 21, a counter cone 22, a bail 23 which is fixedly connected to the counter cone 22 in a connection point A, and a stem 24 with which the closing cone 21 is movably connected to the bail 23.
The frame 10 of the fire damper comprises a substantially cylindrical inner section 10a and a substantially flange-shaped outer section 10b which has an inner surface and an outer surface. The inner section 10a of the frame 10 sets against the inner surface of the ventilation duct 30 and the outer section 10b of the frame sets against an outer surface 40b surrounding the hole 40a in the wall structure 40 and the end of the duct 30. The wall structure 40 here comprises an outer panel 41 and an inner panel 42 and an insulating layer 43 between them. The frame 10 is fastened of its inner section 10a in the duct 30 with fastening means 70, e.g. screws.
The counter cone 22 of the valve 20 of the fire damper consists of a truncated conical inner section 22a and a split annular outer section 22b. The inner section 22a sets in the ventilation duct 30 and the outer section sets against the side surface 40b surrounding the hole 40a in the wall structure 40. Between the closing cone 21 and the counter cone 22 is formed a conical flow duct 26 from which air can enter the ventilation duct 30 or exit it. The stem 24 advantageously consists of a threaded tap, whereby the closing cone 21 includes a nut 25 in which the threaded tap 24 sets. The closing cone 21 is thus movable in the axial direction S in relation to the counter cone 22, whereby the area of the duct 26 between the closing cone 21 and the counter cone 22 is adjustable.
Between the outer section 22b of the counter cone 22 and the outer surface of the outer section 10b of the frame 10, there is a first fire insulating seal 50. Between the inner surface of the outer section 10b of the frame 10 and the side surface 40b surrounding the hole 40a in the wall structure 40 and the end of the duct 30, there is a second fire insulating seal 51. These seals 50, 51 are located in the axial direction S opposite each other on both sides of the outer section 10b of the frame 10. Both fire insulating seals 50, 51 consist of an elastic material resistant to high temperatures, an example of which is the insulating material marketed with trademark Kerafix 2000 owned by a company called Trader-Koo Oy. The wall lead-in of the ventilation duct 30 is also sealed properly against the spreading of fire.
The valve 20 can be fastened in the frame 10 by rotating such that slightly outwards deflected ends 23 a of the bail 23 set against stoppers 10c in the inner section 10a of the frame 10. The stoppers 10c are advantageously designed such that rotating the valve 20 to the frame 10 simultaneously presses down the first fire insulating seal 50 within the outer section 22b of the counter cone 22 tightly against the outer section 10a of the frame 10. The valve 20 thus supports itself to the frame 10 via two support locations at a distance from each other in the axial direction S. The first support location is formed of two support points between the ends 23a of the bail 23 and the inner section 10a of the frame. The second support location is formed via a circular support point formed by the first fire insulating seal 50 between the outer section 22b of the counter cone 22 and the outer section 10b of the frame 10.
Fig. 2 shows a trigger mechanism applicable to the fire damper according to Fig. 1 in its excited state, and Fig. 3 shows the trigger mechanism as triggered. This trigger mechanism is known as such from the above patent FI55767. The trigger mechanism 60 comprises a diaphragm spring 61 installed around the threaded tap 24, which supports itself of its one end to the end of the threaded tap 24 in a washer 62 fastened e.g. with a pin and of its other end on the inner surface of a bottom 21a of the closing cone 21. The trigger mechanism 60 also comprises a flange 63 fastened onto the outer surface of the bottom 21a of the closing cone 21 e.g. with rivets 65, which includes a formed part 64 closing the nut 25 within itself. The nut 25 is fastened in the formed part 64 of the flange 63 with a solder joint 66 which forms a fuse melting in a specific temperature. In the situation of Fig. 2, the diaphragm spring 61 is pressed down and ready to trigger the fire damper as soon as the fuse 66 has melted.
In the event of fire and temperature rising in the flow duct 26 to a temperature which melts the fuse 66, the locking between the nut 25 and the formed part 64 of the flange 63 is released, whereby the spring 61 forces the freely-movable closing cone 21 to close the flow duct 26 totally, as shown in Fig. 3.
Figs. 2 and 3 show a trigger mechanism applicable to the fire damper according to the invention but, from the viewpoint of the invention, it is possible to use any trigger mechanism known by those skilled in the art.
Above was described an advantageous embodiment of the fire damper according to the invention, to which the invention is not intended to be solely limited.

Claims

1. A fire damper of a ventilation duct comprises:
- a frame (10) comprising a substantially cylindrical inner section (10a) and a substantially flange-shaped outer section (10b) which has an inner surface and an outer surface,
- a valve (20) comprising a closing cone (21) and a counter cone (22) between which is formed a flow duct (26), which counter cone (22) consists of a conical inner section (22a) and a split annular outer section (22b), and a trigger mechanism (60) with which the closing cone (21) is triggered against the counter cone (22) for closing the flow duct (26) between the closing cone (21) and the counter cone (22) in the event of fire,
- a first fire insulating seal (50) which is fastened within the split annular outer section (22b) of the counter cone (22), characterised in that the fire damper-further comprises:
- a second fire insulating seal (51) which is fastened on the inner surface of the outer section (10b) of the frame (10).
2. A fire damper according to claim 1, characterised in that the valve (20) further comprises a bail (23) which is fixedly connected to the counter cone (22) at a connection point (A) and a stem (24) with which the closing cone (21) is movably connected to the bail (23).
3. A fire damper according to claim 2, characterised in that the stem (24) consists of a threaded tap which sets in a nut (25) in the closing cone (21), whereby the closing cone (21) is movable in the axial direction (S) in relation to the counter cone (22) for adjusting the area of the duct (26) between the closing cone (21) and the counter cone (22).
4. A fire damper according to any one of claims 1-4, characterised in that the trigger mechanism (60) comprises: - a diaphragm spring (61) installed around a threaded tap (24) which supports itself of its one end to a washer (62) fastened at the end of the threaded tap (24) and of its other end on the inner surface of a bottom (21a) of the closing cone (21), and - a flange (63) fastened on the outer surface of the bottom (21a) of the closing cone (21), which includes a formed part (64) closing the nut (25) within, in which formed part (64) the nut (25) is fastened with a solder joint (66) which solder joint (66) forms a fuse melting in a specific temperature, whereby the melting of the fuse (66) in the event of fire releases the locking between the nut (25) and the formed part (64) of the flange (63), as a result of which the diaphragm spring (61) forces the freely-movable closing cone (21) to close the flow duct (26) totally.
5. A fire damper according to any one of claims 1-4, characterised in that the frame (10) is installed at the end of the ventilation duct (30) extending through a hole (40a) in a wall structure (40) such that the inner section (10a) of the frame (10) sets against the inner surface of the ventilation duct (30) and that the outer section (10b) of the frame (10) sets against a wall surface (40b) surrounding the hole (40a) in the wall structure (40) and the end of the ventilation duct (30), and the valve (20) is installed in the frame (10) such that the inner section (22a) of the counter cone (22) sets within the inner section (10a) of the frame (10) and the outer section (22b) of the counter cone (22) sets against the outer section (10b) of the frame (10), whereby the first fire insulating seal (50) seals the connection between the outer section (22b) of the counter cone (22) and the outer section (22b) of the frame (10) and the second fire insulating seal (51) seals the connection between the outer section (10b) of the frame (10) and the wall surface (40b) surrounding the hole (40a) and the end of the ventilation duct (30).
6. A fire damper according to claim 5, characterised in that the fire damper further comprises fastening means (70) with which the frame (10) is fastened of its cylindrical inner section (10a) in the ventilation duct (30).
7. A method in connection with a fire damper of a ventilation duct, characterised by:
- installing a frame (10) of the fire damper at the end of a ventilation duct (30) extending through a hole (40a) in a wall structure (40) such that a substantially cylindrical inner section (10a) of the frame (10) sets within the ventilation duct (30) and that a substantially flange-shaped outer section (10b) of the frame (10) sets against a wall surface (40b) surrounding the hole (40a) in the wall structure (40) and the end of the ventilation duct (30),
- installing in the frame (10) a valve (20) which comprises a closing cone (21) and a counter cone (22) between which is formed a flow duct (26), which counter cone
(22) consists of a conical inner section (22a) and a split annular outer section (22b), and a trigger mechanism (60) with which the closing cone (21) is triggered against the counter cone (22) for closing the flow duct (26) between the closing cone (21) and the counter cone (22) in the event of fire, - installing a first fire insulating seal (50) between the outer section (22b) of the counter cone (22) and the outer section (10b) of the frame (10), characterised by:
- installing a second fire insulating seal (51) between the outer section (10b) of the frame (10) and the outer surface (40b) surrounding the hole (40a) in the wall structure (40) and the end of the duct (30).
8. A method according to claim 6, characterised by fastening the frame (10) of its inner section (10b) in the ventilation duct (30) with fastening means (70).
PCT/FI2010/050094 2009-02-23 2010-02-12 Ventilation-duct fire damper and method WO2010094835A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10707309.0A EP2398563B1 (en) 2009-02-23 2010-02-12 Ventilation-duct fire damper and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20095172A FI122823B (en) 2009-02-23 2009-02-23 Fire limiter for a ventilation duct and procedure
FI20095172 2009-02-23

Publications (1)

Publication Number Publication Date
WO2010094835A1 true WO2010094835A1 (en) 2010-08-26

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EP (1) EP2398563B1 (en)
FI (1) FI122823B (en)
WO (1) WO2010094835A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2019203399B2 (en) 2018-05-21 2020-12-24 Price Holyoake (NZ) Limited Fire Damper

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371557A1 (en) * 1976-11-20 1978-06-16 Strulik Wilhelm Fire protection valve for air ducts - consisting of fire resistant valve closure body and valve seat
FI55767B (en) 1977-12-21 1979-06-29 Halton Oy BRANDBEGRAENSARE FOER VENTILATIONSANLAEGGNINGAR
EP1095672A1 (en) 1999-10-26 2001-05-02 Wilhelm Paul Strulik Fire stop air vent
DE202006010096U1 (en) * 2006-06-28 2007-11-08 Bartholomäus, Gert Smoke protection device with cold smoke barrier for buildings

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2371557A1 (en) * 1976-11-20 1978-06-16 Strulik Wilhelm Fire protection valve for air ducts - consisting of fire resistant valve closure body and valve seat
FI55767B (en) 1977-12-21 1979-06-29 Halton Oy BRANDBEGRAENSARE FOER VENTILATIONSANLAEGGNINGAR
EP1095672A1 (en) 1999-10-26 2001-05-02 Wilhelm Paul Strulik Fire stop air vent
DE202006010096U1 (en) * 2006-06-28 2007-11-08 Bartholomäus, Gert Smoke protection device with cold smoke barrier for buildings

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EP2398563A1 (en) 2011-12-28
FI122823B (en) 2012-07-13
FI20095172A (en) 2010-08-24
FI20095172A0 (en) 2009-02-23
EP2398563B1 (en) 2014-10-29

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