Simple slag salvaging barrel for cast-in-situ bored pile

The utility model discloses a simple slag salvaging barrel for a cast-in-situ bored pile. The simple slag salvaging barrel comprises a cylinder and a hinge sealing bottom, the cylinder is formed by cutting off a steel pipe, and the loose-leaf back cover adopts a disc-shaped steel structure and is lined at the bottom end of the cylinder; the loose-leaf back cover is divided into a fixed blade and a movable blade, the fixed blade and the movable blade are hinged to each other, the fixed blade is welded to the inner wall of the cylinder, and the movable blade is movably limited to be only capable of being opened towards the interior of the cylinder. The loose-leaf back cover is divided into the fixed blade and the movable blade along the 1/2 position or the 1/3 position of the diameter of the loose-leaf back cover, and the 1/2 wafer or the 1/3 wafer is the fixed blade. The opening angle alpha of the movable blades towards the interior of the cylinder is limited to be larger than or equal to 90 degrees and smalle