VENTILATION VALVE OF UNDERGROUND MINE WORKING Russian patent published in 2013 - IPC E21F17/103 

FIELD: mining.

SUBSTANCE: ventilation valve includes a bed with mechanism of its opening and closing, which is hinged on a support frame, and a gap sealing device between the bed and the support frame. The valve bed consists of sections. Each section of the bed consists of two external layers, two intermediate layers and an internal layer. Each of the external layers is made in the form of a steel plate. Each of the intermediate layers is made in the form of a flexible plate from refractory material. Internal layer is made from heat insulating material. Gap sealing device between the bed and the support frame includes an annular seal from elastic material and an annular foaming gasket.

EFFECT: improving reliability of the ventilation valve owing to improving the rigidity of its bed and simultaneous prevention of the possibility of its buckling in three-dimensional space.

3 cl, 2 dwg