FR2665472A1 - LANTERN EXAMPLE OF SMOKE. - Google Patents

Abstract

Skylight Two jacks are provided and the head of the body (24) of the second jack is articulated on the curb (1) at a distance from the opposite side (4) of the first side (2) substantially at least equal to or just greater than the length of the body (19) of the first cylinder. Building industry.

Description

Lantern smoke outlet.

  The present invention relates to skylights

smoke outlets.

  During a fire, the smoke and hot gases released are as dangerous to man as the flames In addition to the accumulation of heat in the upper parts of the

  buildings encourages the collapse of the frames and roof

  Finally, the concentration of the distillation gases leads to sudden flarings of the entire building and the presence of fumes considerably hampers the intervention of the workers.

security services.

  It is therefore necessary to provide in the building a certain

  number of openings that open in the event of a fire.

  fices can be vertical front or equipped with electromechanical extractors (ducts and fans) However the least expensive solution, when the building lends itself to it, consists of orifices on the roof which, once opened, let escape the smoke and the gas as would a chimney. To verify the reliability of the aircraft, aerodynamic performance is measured. For this purpose, the outlet to be tested is placed above a stabilization chamber in which a uniform static pressure is maintained and the flow of the outlet is measured. When it is open, furthermore, the outlet is subjected to a side wind generated by a wind tunnel by rotating it relative to the wind in order to

  simulate all positions in relation to the wind that it

  would be present during a fire At the end of this test,

  the device is assigned a S U E (Useful Area of

  outlet) in the form of a coefficient to be applied

  quer on its geometric surface. To obtain a satisfactory S u E coefficient, it is necessary: either to surround the hopper of the outlet of walls forming "windbreaks" so that the side wind does not close the smoke in the hopper, especially in the position where the

  closing shutter serves as a path for the wind

  when it passes, either open the shutter at a sufficiently large angle, in practice 1400, so that it does not oppose the passage of the

wind.

  The opening of a shutter weighing at such a large angle is a difficult operation in itself, which becomes

  especially since the component, which is intended only for

  exceptionally, must be opened for sure in the event of

  while architectural and architectural constraints

  truction (frame or slab that supports the curb)

  the space available to house the opening mechanisms. The invention provides for this by means of a smoking smoke shield, robust and simple to manufacture, the opening of which is reliable and safe, and requires fluid pressures as small as possible to maneuver it, which remains well in closed position without to be lifted by the wind or to fall back loudly and that comes back softly and

  cushioned, which leaves the space around it and allows the use of high curbs.

  The subject of the invention is a smoke outlet comprising a parallelepipedal curb whose iron shutter

  The frame can pivot about a first upper side of the curb under the action of a cylinder mechanism characterized in that the mechanism comprises a first and a second cylinder, the free end of the rod of the first cylinder is hinged on the flap and the head of the body of the first jack is articulated on a pivotally mounted member on the flap, the free end of the rod of the second jack is

  on the element between the point of articulation of this element

  on the shutter and the point of articulation of the body of the

  first cylinder on the element and the head of the body of the second cylinder is articulated on the curb at a distance from the opposite side

  on the first side substantially at least equal to or just above

  than the length of the body of the first cylinder.

  Thanks to the duality of the cylinders and their particular assembly, the first cylinder makes an angle of 60 to 1200 with the shutter in any position of the shutter 3 and the second cylinder makes an angle of 60 to 1200 with the movable element as the one made with the curb an angle less than 900 The cylinders are substantially perpendicular to the load they must move They are effective and, when returning the shutter, the

  stroke of the rod of the first cylinder in his body remains sen-

  proportionally to the pivot angle of the flap, so that the damping due to the compression of the fluid remaining in the body can be effected at best The point of articulation of the second cylinder at a distance from the first side substantially equal to the length of the body of the first cylinder is the best compromise between the need to move this point as far as possible from the first side to give a large lever to the second cylinder and therefore for it to be very effective and that to leave at first cylinder clearance for housing, in the closed position of the flap, 30 as the second cylinder, approximately vertically below the curb. According to an improvement, a fluid pressure unlocking locking device retaining the flap on the side of the curb opposite the first side and comprising means for preventing the fluid from actuating the jacks as long as the device locking is not unlocked Thus prevents any danger of deformation of the curb under the unwanted and powerful action of the cylinders. In the accompanying drawing, given solely by way of example:

  Figures 1, 2 and 3 are side views of the

  in a closed, semi-open and fully open position, and

  FIG. 4 is a diagram of a device for ver-

  rust used in the skylight.

  The escape lantern has a parallelepipedal curb 1 in the form of a box open upwards and downwards. On a small upper side 2 is pivotally mounted a translucent shutter 3 in the form of a cupola. The free end of the shutter 3 is locked on the other small upper side 4 of the curb 1 by a latch This latch comprises a latch 5 penetrating a latch of a conventional mechanical locking device 6 The latch 5 is integral with a finger 7 itself fixed on the rod 8 of a piston 9 recalled by a spring 10 housed in a cylinder 11 The cylinder-dre is pierced with two connections 12 and 13 for connection to a source of compressed air and a pneumatic control circuit The connectors 12 and 13 come into communication via the cylinder 11 only when the piston is pushed back to

  against spring 10 by the fact that

  the locking device 6.

  A fixed cross member 14 connects the two small lower sides of the curb 1 A fixed cross member 15 connects the two short sides of the flap 3 A member 16 is hinged to the bottom of the cross member 15 near the side 2 The free end 17 of the rod 18 of a first cylinder is articulated in the middle of the cross member 15 The head of the body 19 of the first cylinder is articulated to the free end 20 of the element 16.35 The free end 21 of the rod 22 of a second cylinder is

2665472

  articulated at a point 23 of the intermediate member 16 between the end 20 and the bottom of the cross member 15 The head of the body 24 of the second cylinder is articulated on the cross member 14 at a distance from the side 4 slightly greater than the length of the body 19 of the first cylinder.

  Ducts 25 feed the cylinders with compressed air from the connector 13.

  The escape lantern works as follows:

  The compressed air is sent into the connection 12 of the lock which releases the shutter 3 which it kept closed.

  The rod 18 of this jack then drives the cross member 15 and opens it at an angle of about 450 (the value of this angle is only specified for the purpose of understanding because it depends on length of cylinder used) The pressure is then applied to the second cylinder. The second cylinder then drives the assembly of the first cylinder, the cross-member 14 and the cross-member 15 in such a way that

  that the flap 3 makes an angle of at least 1400 relative to the plane of attachment of the curb 1.

  For reclosing, the air pressure is sent by another circuit first to the first cylinder, then to the

  second cylinder which, to complete the closure, engages the locking device 6.

Claims (4)

  1 smoke escape lantern, including a   curb (1) parallelepiped whose shutter (3)   ture can pivot about a first upper side (2) of the curb (1) under the action of a cylinder mechanism, characterized in that the mechanism comprises a first and a second cylinder, the free end (17) of the rod (18) of the first cylinder is   articulated on the shutter (3) and the head of the body (19) of the first   first cylinder is articulated on a member (16) pivotally mounted on the flap (3), the free end (21) of the rod (22) of the second cylinder is articulated on the element (16) between the point of articulation   of this element (16) on the shutter (3) and the articulation point   tion (20) of the body (19) of the first cylinder on the element (16), and the head of the body (24) of the second cylinder is articulated on the curb (1) at a distance from the opposite side (4) to the first side (2) substantially at least equal to or just greater than   the length of the body (19) of the first jack.   2 Lantern according to claim 1, characterized   rised in that the first cylinder makes an angle of 60 to 1200   with the shutter in any position of the shutter.   3 skylight according to claim 1 or 2, characterized in that the second cylinder makes an angle of 60 to 1200 with the movable element as it does with the 7 2665472   curb angle less than 900.   4 Lantern according to claim 1, characterized   characterized in that it comprises a locking device for unlocking by pressure of a fluid, holding the flap (3) on the side (4) of the curb (1) opposite to the first side (2) and comprising means ( 5 to 13) to prevent the fluid from actuating the jacks as long as the locking device is not unlocked.