Horizontal plugging protection equipment

The utility model relates to a horizontal plugging protection device which is installed by means of a peripheral civil engineering structure, the civil engineering structure comprises a floor with an orifice, and the horizontal plugging protection device comprises a plugging door leaf and a hoisting device. The bottom edge of the blocking door leaf is adjacent to the orifice and is rotatably mounted on the floor on one side of the orifice through a hinge mechanism; the hoisting equipment is connected with the part, far away from the bottom edge, of the blocking door leaf so as to drive the blocking door leaf to rotate around the axis of the hinge mechanism; at ordinary times, the blocking door leaf rotates to a storage state around the axis of the hinge mechanism; in wartime, the blocking door leaf rotates around the axis of the hinge mechanism to a blocking state in which the blocking door leaf is flatly placed on the floor and covers the orifice. According to the horizontal plugging protection equipment, ra