Closure for sprinklers and nozzles with heat activation

Abstract

Closure for sprinklers and nozzles with heat activation for use in fire fighting, comprising a nozzle body (1) and an outlet channel (11) which is kept tightly closed by means of a cover (5). The cover (5) is detachably connected to the nozzle body (1) and detaches in case of fire. At least one of the fastenings between the cover (5) and the nozzle body (1) is a releasable arrangement (6) and at least one other is a connection (7). The heat-sensitive element is integrated in the releasable arrangement (6) or acts thereon so that the releasable arrangement (6) is detached when the heat-sensitive element is released. The forces on the cover (5) are distributed between the detachable assembly (6) and the joint (7) so that the detachable assembly (6) carries only a fraction of these forces.

1 . Closure for sprinklers and nozzles with heat activation, with a nozzle body ( 1 ) and an outlet channel ( 11 ), wherein a seal ( 4 ) is arranged on the nozzle body ( 1 ) above the outlet channel ( 11 ), which seals off the outlet channel ( 11 ),
 wherein the seal ( 4 ) is pressed against the outlet channel ( 11 ) by a cover ( 5 ) and is held in the closed position, wherein the cover ( 5 ) is detachably fastened to the nozzle body ( 1 ) and can be actively or passively removed in the event of fire,   characterised in that   the cover ( 5 ) is connected to the nozzle body ( 1 ) by at least two fastenings,   a first fastening is a releasable arrangement ( 6 ) and a second fastening is a connection ( 7 ) around which the cover ( 5 ) is movable,   wherein the releasable arrangement ( 6 ) comprises at least one heat-sensitive element and is released upon active or passive activation of the heat-sensitive element.   
     
     
         2 . Closure according to  claim 1 ,
 characterised in that   the cover ( 5 ) falls out of the connection ( 7 ) after a certain angle of movement and is thus completely detached from the nozzle body ( 1 ).   
     
     
         3 . Closure according to  claim 1 ,
 characterised in that   the releasable arrangement ( 6 ) comprises a fusible element ( 61 ) which connects the cover ( 5 ) to the nozzle body ( 1 ), fuses in the event of fire and detaches the cover ( 5 ) from the nozzle body ( 1 ).   
     
     
         4 . Closure according to  claim 1 ,
 characterised in that   the detachable assembly ( 6 ) comprises a fastening element ( 62 ) and an explosive ( 63 ) which is detonated in the event of fire and detaches the cover ( 5 ) from the nozzle body ( 1 ).   
     
     
         5 . Closure according to  claim 4 ,
 characterised in that   the fastening element ( 62 ) is a special screw with a predefined breaking point or an adhesive.   
     
     
         6 . Closure according to  claim 1 ,
 characterized in that   the releasable assembly ( 6 ) comprises a heat-sensitive and frangible glass bulb ( 64 ).   
     
     
         7 . Closure according to  claim 6 ,
 characterized in that   the glass bulb ( 64 ) is arranged in the cover ( 5 ) substantially at right angles to the axis of the outlet channel ( 11 ).   
     
     
         8 . Closure according to  claim 7 ,
 characterised in that   the releasable assembly ( 6 ) comprises a latch ( 65 ) movable in the cover ( 5 ) between two positions: a closed position in which the front end of the latch ( 65 ) engages in a first recess ( 12 ) of the nozzle body ( 1 ) or abuts against a first abutment of the nozzle body ( 1 ), and an open position in which the front end of the latch ( 65 ) does not engage in the first recess ( 12 ) or does not abut against the first abutment.   
     
     
         9 . Closure according to  claim 8 ,
 characterized in that   the cover ( 5 ) comprises an actuating element ( 66 ) which acts on the latch ( 65 ) and on the lid ( 5 ) in such a way that the latch ( 65 ) is always pushed or pulled towards the open position,   wherein in the waiting position, the glass bulb ( 64 ) holds the latch ( 65 ) in the closed position against the force of the actuating element ( 66 ).   
     
     
         10 . Closure according to  claim 3  or  4  or  6 ,
 characterised in that 
 for active activation of the nozzle, the heat-sensitive element is actively heated by means of a controlled electrical resistance or induction heating element. 
 
     
     
         11 . Closure according to  claim 10 ,
 characterized in that   the active heating of the heat sensitive element is controlled by an intelligent controller.   
     
     
         12 . Closure according to  claim 11 ,
 characterised in that   the intelligent controller is connected or can communicate with one or more fire sensors ( 14 ) and/or with an external control station from which the intelligent controller receives fire alarms and/or instructions.   
     
     
         13 . Closure according to  claim 1 ,
 characterised in that   the heat sensitive element is only activated passively and a second heat sensitive element is only activated actively.