Pressure vessel safety opening device and pressure vessel thereof

The utility model discloses a pressure vessel safety opening device and pressure vessel thereof, it sets up on pressure vessel's lid, hoist device includes pull ring, control valve and control the link mechanism that the control valve was opened, pull ring, link mechanism and control valve set up in on the lid, link mechanism's one end with the valve gap of control valve is articulated, its other end with the connection can be dismantled to the pull ring, link mechanism's one end with during the pull ring separation, link mechanism drives the valve gap of control valve is opened, makes pressure vessel's the inside and outside atmospheric pressure of cavity keeps unanimous. The utility model discloses a set up link mechanism between control valve and pull ring, when preparing hoist and mount, needed at first to break away from link mechanism mutually with the pull ring, then could arrange the lifting hook in pull ring and prepare to lift by crane, otherwise operating personnel just can't develop hoist and moun