Classifications

• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
  • B05B1/32—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages in which a valve member forms part of the outlet opening

Definitions

• the present invention relates to a fine spray nozzle, particularly for extinguishing fires, comprising an approximately rotationally symmetrical nozzle body provided with a central bore and one end of which is fitted with a device for connecting the nozzle to a hose or the like which is equipped with a. corresponding connecting element.
• the fine spray nozzle has the design and comprises the characteristics which are listed in the accompanying Patent Claims.
• Figure 1 shows schematically and partly in section a side view of an embodiment of a nozzle according to the invention
• Figure 2a shows schematically and partly in section a side view of an alternative embodiment of a nozzle according to the invention wherein the opening of the nozzle is controlled automatically by the water pressure.
• Figure 2b shows the nozzle further open than in Figure 2a.
• Figure 3 shows a cross-section along line II - II through the nozzles shown in Figures 1 and 2b.
• Figure 4 shows a cross-section along line I - I through the nozzle shown in Figure 2b.
• a body 1 is constructed as a body of rotation with end faces perpendicular to its axis of rotation, like a truncated cone, for example.
• the base surface 2 of this cone is equipped with a central, pipe connection 4 with an external thread.
• the top surface 3 of the cone is equipped with a cylindrical projection 5 which has a threaded part 6 at its free end.
• the projection 5 is provided with a central bore 7 with the same diameter, as the internal diameter of the pipe connection 4 and extending from this connecting part 4 almost up to the threaded part 6, where it terminates in a base 9.
• the projection 5 bas a number, preferably four, of longitudinally extending, planar chamfers 8 arranged at regular intervals and of such a width, that between them there remain strips 10 of the cylinder surface.
• the projection 5 is also provided with longitudinal slots 11 extending from the centre of the chamfers
• the disc washers 12 are arranged in pairs with shim rings 13 provided between the pairs, having the same external and internal diameters as the disc washers 12. Rings 13 are also provided outside the outermost pairs of disc washers 12. The thickness of the rings 13 is adapted so that the section with the disc washers 12 and the rings 13 is the same length as the chamfers 8. On the threaded part 6 beyond this section an adjustment nut 14 is provided and outside this there is a holding nut 16 with a recess 18 which is not threaded right through.
• the adjustment nut 14 By means of the adjustment nut 14 the amount of water per unit of time flowing out through the slits 15 between the disc washers 12 can be varied. The size of the individual drops is thereby influenced so that the finest dispersion is obtained with the smallest width of the slits 15.
• the nozzle shown in Figures 2a and 2b comprises a piston 20 which is axially movable, in the bore 7 and the piston rod 21 of which is slidably mounted on the free end wall 22 of the projection 5.
• a helical spring 23 acts between the wall and the piston 20 so that the pressing down of the piston 20 towards the end wall 22 is counteracted by the spring force.
• the free end of the piston rod 21 has a thread 24 which fits in the thread of the adjustment nut 14.
• the combination of the piston 20 with its piston rod 21, the helical spring 23 and the adjustment nut 14 provides automatic control of the size of the slits 15 between the disc washers 12. This is achieved in the following way; Under the effect of increasing water pressure the piston 20 is pressed downwards in the Figure, counteracted by the spring force, so that the adjustment nut 14 is also moved downwards. The space available for the disc washers 12 and the rings 13 thereby becomes larger and the slits 15 between the disc washers 12 are widened.
• the nozzle according to the invention is used, for example, by fitting it as the nozzle on the jet-pipe connected to a hosepipe, or as a sprinkler head beneath, a ceiling.
• the disc washers 12 are reversed so that the slits 15 between them slope backwards towards the fixing 1, while the outer face of the holding nut 16 is expediently planar or rounded 17.
• the outside face of the holding nut 16 is expediently shaped as a solid pointed cone 19 with an acute point.
• the holding nut 16, 19 can be used in this case to knock a hole in the ceiling of the room from above and to introduce the nozzle through this hole, into a position immediately under the ceiling.
• the disc washers 12 are turned round so that they slope towards the body 1.
• the cloud of fine spray directed obliquely upwards towards the ceiling which is produced from a nozzle thus introduced through the ceiling into a room which is burning all over is quickly vaporised without any drops falling down and, due to the fact that its weight is lower than that of the smoke gas (the weight of water vapour relative to that of carbon dioxide is in the ratio of 18 to 40 at the same temperature), the steam produced remains as an ever-thickening layer under the ceiling until it fills the whole room. The. steam does not support the fire, which is thus extinguished from above, downwards.
• a nozzle with the disc washers 12 turned so that they slope forwards towards the holding nut 16. In this case the steam formed again rises up, due to its lower volumetric weight and comes to rest as an increasingly thick, layer under the ceiling of the room.
• the nozzle may be used in industry wherever there is a need for a spray of extremely finely dispersed water.

Landscapes

• Health & Medical Sciences (AREA)
• Public Health (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Nozzles (AREA)
• Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20343054

Family Applications (1)

Country Status (3)

Families Citing this family (4)

Family Cites Families (4)

• 1981
  • 1981-02-04 SE SE8100800A patent/SE8100800L/sv not_active Application Discontinuation
• 1982
  • 1982-02-04 EP EP19820900403 patent/EP0071620A1/en not_active Withdrawn
  • 1982-02-04 WO PCT/SE1982/000028 patent/WO1982002679A1/en unknown

Non-Patent Citations (1)

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