Quick opening device for pressure container

The utility model relates to a quick opening device for a pressure vessel, which comprises a first hoop piece and a second hoop piece, the first hoop piece and the second hoop piece are connected with a bearing mechanism arranged on the outer rings of the first hoop piece and the second hoop piece through connecting pieces, and the bearing mechanism comprises a first screw rod and a second screw rod which are parallel to each other; the first lead screw is composed of a first conveying section and a second conveying section, the first conveying section is in threaded connection with a first sliding block, and the second conveying section is in threaded connection with a second sliding block. The weight borne by the first hoop piece and the second hoop piece is converted into the weight borne by the first lead screw and the second lead screw through the bearing mechanism, the weight limitation can be broken through, and the sealing device can be applied to sealing of a large-caliber or high-pressure cavity. Th