Bottom gap shielding device for anti-explosion door

The invention discloses a bottom gap shielding device for an anti-explosion door. The bottom gap shielding device comprises a doorsill mounting pit, a bearing box, a doorsill lock assembly, an ascending reset assembly, a descending driving assembly, a lifting-bearing composite member, a water-proof sealing assembly and a position detector, wherein the bearing box is arranged in the doorsill mounting pit; the ascending reset assembly and the descending driving assembly are fixedly arranged at the bottom of the inner cavity of the bearing box respectively; the ascending reset assembly is used for driving the lifting-bearing composite member to ascend; the descending driving assembly is used for driving the lifting-bearing composite member to descend; the doorsill lock assembly is provided with a door lock bolt; the lifting-bearing composite member is provided with a keyhole; the door lock bolt of the doorsill lock assembly can be inserted into the keyhole of the lifting-bearing composite member to realize locking of the lifting-bearing composite member; the doorsill lock assembly is provided with the position detector; a water-proof sealing assembly is arranged between the lifting-bearing composite member and the inner wall of the bearing box. By adopting the bottom gap shielding device, shielding and opening of a bottom gap of the anti-explosion door can be realized through automatic ascending and descending functions.