Classifications

• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62C—FIRE-FIGHTING
  • A62C5/00—Making of fire-extinguishing materials immediately before use
  • A62C5/002—Apparatus for mixing extinguishants with water
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62C—FIRE-FIGHTING
  • A62C31/00—Delivery of fire-extinguishing material
  • A62C31/02—Nozzles specially adapted for fire-extinguishing
  • A62C31/12—Nozzles specially adapted for fire-extinguishing for delivering foam or atomised foam
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62C—FIRE-FIGHTING
  • A62C5/00—Making of fire-extinguishing materials immediately before use
  • A62C5/02—Making of fire-extinguishing materials immediately before use of foam

Definitions

• the present invention relates to a fire extinguishing arrangement, which is preferably but not exclusively intended for stationary installation in buildings, means of transport, and similar.
• the water stations with hoses that are installed in hotels and in other frequently visited buildings are normally unsatisfactory, not only because it takes time to connect nozzles, hoses, etc., and the effect is often unsatisfactory, but also because it is not possible due to aesthetic considerations to arrange the water outlet in the most appropriate manner.
• Foam extinguishers are efficient, but since the foam is particularly bulky even before it is deployed, such arrangements can be used only to a limited extent, and it cannot be expected that they will be used completely rationally when panic has arisen. This is of major significance due to the short period during which output of foam from a container of limited size can take place. Powder extinguishers are principally associated with the disadvantage of having a very limited radius of action and a very limited time of action.
• the aim of the invention therefore, has been to achieve a simple and cheap arrangement that is efficient enough to make it possible to evacuate a building, means of transport, etc.
• Figure 1 thus shows in principle a water pipe with an attached device for the production of foam.
• Figure 2 shows a water pipe with an attached extinguishing unit.
• Figure 3 constitutes a plan view of a part of a building with a fire extinguishing arrangement according to the invention.
• Figure 4 shows a perspective view of a modified arrangement
• FIG. 5 constitutes a section through the arrangement according to Figure 4, and finally,
• Figure 6 constitutes a frontal view of a fixed fire extinguishing unit.
• problems of the type described above during the extinguishing of a fire are solved through a compound, which will be referred to as "foam compound", that forms an extinguishing foam when combined with water, and which is maintained until the occasion of use separate from the water, and through the said water, which acts not only in the formation of the foam but also as propellant for it, is placed under pressure. It is also appropriate that the water is obtained from a water pipe of essentially conventional design.
• a foam compound is used for the production of extinguishing foam by being mixed with water in predetermined proportions.
• the foam that is developed in this way has a significantly greater volume than the combined volume of the water and the compound, and it must be realised that it will be possible, by storing only the relatively low volume of foam compound, to achieve a very great volume of foam, since the amount of water is added gradually, at least in buildings that have a fixed water supply installation.
• One litre of foam compound provides approximately lm of foam.
• the arrangement in its simplest form according to Figure 1 comprises a water pipe 1, provided with a number of outlets 2 and the stopcocks 3 associated with these.
• a tube 4 can be connected to each of these outlets, which tube communicates via a second tube 5 with a dosing device 6, which in turn is connected through a tube 7 to a container 8 containing the foam compound.
• the stopcock 3 When the stopcock 3 is opened, water under pressure will flow through the tube 4 towards a spreader nozzle 9 that is connected to the tube.
• FIG. 2 constitutes an example of such a device.
• the foam extinguishing unit has been given the general reference numeral 10, and it is constituted by a tube 11 that forms at one end an externally directed connection flange 12.
• a throttle nozzle 13 and a diffusion nozzle 14 are arranged in the tube 11, and the tube demonstrates a thread 15 or similar for the attachment of a spreader nozzle 16 at the opposite end to that of the flange 12.
• the tube 11 is in communication via a thinner tube 17 with a closed container 18, which contains the foam compound 19. It is appropriate that a hole 20 for air intake, which is normally held closed by a check valve 21, is arranged in the upper part of the container.
• the nozzles 13 and 14 are designed and arranged relative to each other and to the tube 17 such that they form, in combination with the said tube 17 and the tube 11, an ejector pump, and it will be realised that the water that is held under pressure will, on the opening of the stopcock, achieve not only the dosed mixing of water and foam compound, but also the formation of foam and the output of foam.
• the stopcock 3 should be designed such that it can be rapidly turned to a fully open position, and naturally, known devices can be arranged to achieve instantaneously the desired suction effect through hoses.
• Arrangements of the type described here can be so designed that they can produce continuous pathways or carpets of foam, and such an design is shown in Figure 3, intended for, for example, passage from a hotel room to a lift or similar.
• 24 denotes hotel rooms and 25 denotes corridors leading to a lift 26.
• 24 denotes hotel rooms and 25 denotes corridors leading to a lift 26.
• foam extinguishing units 28, according to Figure 4 in such a manner that they normally adopt a position of preparedness, from which they very rapidly can be brought into an operational position.
• a number of such foam extinguishing units 28 each hang from a thread 29, attached for example to the ceiling directly above an outlet 2 in a water pipe 1.
• the foam extinguishing units in this way demonstrate control sections 31a, 31b that maintain them in a straddle position above the pipe 1.
• the container 32 for each of the units can thus be positioned under the pipe 1 and a tube 33 can be placed in connection through a thinner tube 34 with the container 32 in essentially the same manner as the tube 17 in Figure 2, and the tube 33 can thus via a bent section open out above the relevant outlet 2.
• the outlet can, in this way, demonstrate a valve seating 35, and a valve body 36 can interact in a sealing manner with the valve seating 35 through the effect of the water pressure, appropriately supported by a spring 37.
• a release rod 38 for the foam extinguishing unit is so arranged that when the foam extinguishing unit is allowed to fall, through the cutting, for example, of the thread 29, it rapidly opens the valve 36 and in this way initiates the extinguishing procedure.
• a calibrated ball 39 suspended in the tube 33 is intended to provide the negative pressure that ensures that an amount of foam proportional to the amount of flowing water is added to the water for the production of foam.
• the water pipe 1 does not need to be stationary, and a hose fed by a motor-driven pump can be envisaged, which pipe demonstrates a number of outputs or, where relevant, preinstalled extinguishing units according to the invention.
• a high-pressure pump for the purposes of increasing the pressure.
• a mobile arrangement can thus be combined with a fixed arrangement, for example, of the type described above, and interaction between fire extinguishing arrangements that are present on the site and mobile arrangements brought into place by, for example, the fire service, can thus arise, resulting in a particularly efficient fire extinguishing process.
• the fire extinguishing unit in the embodiment shown in Figure 6 has the form of a cabinet 40 that demonstrates on its front surface an opening 41 through which a length of hose 42 designed for the intended use can be inserted and removed.
• the venturi tube 17 that is used for withdrawal by suction of the foam compound from the exchangeable container 18 is terminated at its lower end by a strainer or a filter 43, and the supply of water takes place through a throttle valve 44, which is connected to the actual ejector, and which is calibrated according to the dimension of the hose that is being used in the particular situation.
• the spreader nozzle 45 is located readily available in the upper, open part of the cabinet.
• the fire extinguishing operation is produced by means of a stopcock 46, the control lever of which is located easily accessible on the front surface of the cabinet.

Landscapes

• Health & Medical Sciences (AREA)
• Public Health (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
• Fire Alarms (AREA)
• Gas-Filled Discharge Tubes (AREA)
• Insulated Conductors (AREA)
• Materials For Medical Uses (AREA)
• Control Of Motors That Do Not Use Commutators (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=20286920

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Family Cites Families (3)

• 2002
  • 2002-02-12 SE SE0200390A patent/SE518878C2/sv not_active IP Right Cessation
• 2003
  • 2003-01-29 EP EP03703568A patent/EP1539301B1/de not_active Expired - Lifetime
  • 2003-01-29 DE DE60316697T patent/DE60316697D1/de not_active Expired - Lifetime
  • 2003-01-29 AU AU2003207168A patent/AU2003207168A1/en not_active Abandoned
  • 2003-01-29 AT AT03703568T patent/ATE374644T1/de not_active IP Right Cessation
  • 2003-01-29 WO PCT/SE2003/000141 patent/WO2003068321A1/en not_active Ceased

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events