Water trough for combating coal dust and fire damp explosions in mines - is closable by cover suspended or fixed in frame with groove connecting to upper end of trough walling

摘要

The groove (3) with the covered water trough accommodates the edge (4) of the cover (2), and in it is a seal, at least part of which (6) locates on the edge (4) of the cover. The edge of the cover has a freely projecting, flange-type extension (5). The groove (3) of the water trough (1) is deeper than it is wide. The cover (2) in its area above the filling of the trough has a deepened formation (7) opposite to its locating area (8) on the edge of the water trough. The hollow space between the filling of the water trough and the underside of the cover is fed with vacuum. USE/ADVANTAGE - Low maintenance seal between the trough and its covers, involving a redn. in material usage.