Locking device for dumping material barrel

A locking device for dumping a material barrel is characterized in that a vertical sliding rod of the locking device can vertically slide and rotate in a supporting seat, when the vertical sliding rod rotates inwards, arc-shaped baffles at the two ends of the vertical sliding rod synchronously rotate inwards and are attached to the upper end side face and the lower end side face of the material barrel respectively, then the vertical sliding rod is pressed downwards, and the two arc-shaped baffles move downwards; a clamping jaw at the upper end of an upper arc-shaped baffle is clamped at an upper end opening of a material barrel, at the moment, a stop lever of a locking head can just move to the inner side of the lower end of a limiting plate, then the stop lever is rotated outwards through a rotating sleeve of the locking head, the stop lever is rotated to the position below the limiting plate and attached to the lower end face of the limiting plate, and the stop lever is locked on the limiting plate by screw