Protective cover for a ventilation opening

Abstract

A protective cover is provided for a ventilation opening in a plant space of a nuclear-engineering plant. The cover is configured, with a construction that is simple, and with simple manufacture and mounting, for a sufficient air-flow cross section and also for protection against ingress of destructive projectiles into the building interior. The protective cover has profile elements, which are arranged in a mounting plane in a rectangular frame, are aligned in a longitudinal direction such that they are parallel to one another, and are shaped in the same way and orientated in the same way. The relevant profile element has an L-shaped or V-shaped cross section with two limbs that meet in a peak, with the peaks pointing in the transverse direction. A spacing between profile elements that immediately follow each other is chosen such that there is no rectilinear passage between them.

1 . A protective cover for a ventilation opening in a plant space of a nuclear-engineering plant, the protective cover comprising:
 a rectangular frame having a longitudinal direction and a transverse direction; and   a plurality of elongate profile elements disposed in a mounting plane in said rectangular frame, said profile elements aligned in said longitudinal direction such that said profile elements are parallel to one another, and are shaped in a same way and orientated in a same way, wherein each of said profile elements having an L-shaped cross section or a V-shaped cross section with at least two limbs that meet in a peak, with said peak pointing in said transverse direction, and wherein a first spacing between said profile elements that immediately follow each other is chosen such that there is no rectilinear passage between said profile elements.   
     
     
         2 . The protective cover according to  claim 1 , wherein said two limbs of said profile elements meet in said peak at an angle that ranges from 80° to 110°. 
     
     
         3 . The protective cover according to  claim 1 , wherein, when viewed in said transverse direction, a second spacing which characterizes an overlap between a leading edge of said profile element and a trailing edge of said profile element that is located immediately in front of it is approximately 0.5% to 5% of a total width of said profile element in said transverse direction. 
     
     
         4 . The protective cover according to  claim 1 , wherein said two limbs of said profile elements have same dimensions. 
     
     
         5 . The protective cover according to  claim 1 , wherein said profile elements have a cross section being constant over an entire longitudinal extent. 
     
     
         6 . The protective cover according to  1 , wherein each of said profile elements have two end faces, at which each of said profile elements is welded to said frame. 
     
     
         7 . The protective cover according to  claim 1 , wherein said profile elements are configured in a unipartite manner and produced by bending an originally planar steel sheet. 
     
     
         8 . The protective cover according to  claim 1 , wherein said rectangular frame is composed of said profile elements with U-shaped cross sections or double-U-shaped cross sections. 
     
     
         9 . The protective cover according to  claim 1 , wherein said two limbs of each of said profile elements meet in said peak at an angle of 90°.