Low-temperature normal-pressure storage tank capable of preventing and controlling overpressure

The utility model provides a low-temperature and normal-pressure storage tank capable of preventing and controlling overpressure, and relates to the technical field of vacuum low-temperature storage, the storage tank comprises a tank and a placement box, the tank is rotatably mounted on the placement box, one end of the tank is provided with a rotation driving assembly, the other end of the tank is provided with an air inlet, and the upper end of the placement box is provided with a fixing frame; a spraying assembly and a cleaning assembly are arranged on the fixing frame, the spraying assembly is fixed to the top of the fixing frame, the cleaning assembly is fixed to the inner side wall of the fixing frame, the tank is rotationally installed on the containing box, cooling liquid is arranged in the containing box, in the normal state, the spraying assembly conducts conventional cooling on the tank at the rated power, and the cleaning efficiency is improved. And when the thermometer detects that the temperatur