Telescopic movable flue gas collecting cover

The utility model relates to a telescopic movable flue gas collecting cover, and belongs to the field of industrial waste gas collection. The smoke collecting cover comprises a fixed cover, a movablecover, a fixed rail, a movable rail, a first walking rack and a second walking rack. The fixed rails are laid on the two sides of the pouring pool, and the first walking rack is arranged at the bottomof the fixed cover and erected on the fixed rails. And the movable cover is nested on the fixed cover, and two-way movement is achieved through a second walking rack mounted at the bottom of the movable cover. According to the flue gas moving cover disclosed by the utility model, on the premise that the existing pouring process is not influenced; the sand box is effectively sealed, flue gas is collected, the length of the flue gas collecting cover can be flexibly adjusted according to the length of the sand box through mutual cooperation of the fixed cover and the movable cover, the sand boxis suitable for various wor