The utility model discloses a light fireproof plugging plate structure for sealing a
tube well floor hole constructed from the lower part, which comprises an upper-layer edge
keel, a lower-layer edge
keel, an upper-layer horizontal
keel, a lower-layer horizontal keel, an upper-layer fire-resistant paper surface
gypsum board, a lower-layer fire-resistant paper surface
gypsum board, rock
wool and
sealant, a plurality of upper-layer edge keels and a plurality of lower-layer edge keels are fixed to the upper portions and the lower portions of the opposite surfaces of a left beam and a right beam which are parallel to each other at the indoor top in the extending direction of the beams at intervals, upper-layer horizontal keels are fixed to the positions between the left upper-layer edge keels and the right upper-layer edge keels which correspond to each other, and upper-layer fire-resistant paper face
gypsum boards are fixed to the lower surfaces of the upper-layer horizontal keels. Lower-layer horizontal keels are fixed between the left and right corresponding lower-layer edge keels, are positioned at the bottom end of the upper-layer fire-resistant paper surface gypsum board, are filled with rock
wool, and are fixed on the lower surfaces of the lower-layer horizontal keels; the left end and the right end of the lower fire-resistant paper surface gypsum board are fixed to the bottoms of the left beam and the right beam respectively.