Centrifugal concrete mixer

A centrifugal concrete mixer, including a base frame, a mixing drum provided on the base frame, and a transmission means coupled to the base frame, the transmission means driving a transmission shaft to rotate via a power device, characterized in that:

• the power device rotates at a speed of 60 rpm to 600 rpm, one end of the transmission shaft penetrates the mixing drum, a waterproof unit is provided between the transmission shaft and the mixing drum, at least one stirring piece is provided on an outer edge of the transmission shaft in the mixing drum, the waterproof unit is hollow sleeve, one end of the waterproof unit is fixedly connected to the bottom of the mixing drum where the transmission shaft penetrates, a top end of the transmission shaft is connected to the stirring piece via a connecting piece, a center of the connecting piece is provided with a cap portion for connecting the transmission shaft, a plurality of sub-rods extend downwardly from the outer periphery of the connecting piece to the bottom of the mixing drum, the stirring piece is fixedly provided on the sub-rod, the stirring piece is formed into a plate, an outer surface of the stirring piece relative to its rotation direction is formed into an inclined surface, the inclined surface of the stirring piece is capable of generating a centrifugal force when the stirring piece is driven by the transmission means to rotate at a high speed, thereby mixing the concrete containing stones.