Self-locking multifunction extract pot

The utility model relates to a self-locking multifunction extracting tank, which comprises a tank 3, a lower door 1 of the tank, a cylinder 2 which is arranged vertically, and cylinder 4, 5 which are arranged horizontally. The utility model has the advantages that the self-locking multifunction extracting tank discards the traditional hook type locking device, and creatively uses a concave convex (convex concave) edge type locking device. The lower door is pushed in the mode of an air cylinder, an oil cylinder, or hydraulic pressure to do multidimensional movement to lock the lower door. After the lower door is locked, the original state that the lower door is locked by external force is altered, and natural locking is adopted. Consequently, the utility model has the advantages of reliable self-locking, the improvement of safety, and the avoidance of leakage, unnecessary waste, and the occurrence of accidents.