Roller circulating cooling device

The utility model discloses a roller circulation cooling device which comprises a heat exchanger and a controller, the heat exchanger comprises a heat conduction arc plate and a heat conduction protruding column, the heat conduction protruding column comprises a heat conduction sleeve, a heat conduction column and a heat conduction driving piece, and the arc-shaped inner wall of the heat conduction arc plate is in contact with the outer wall of a sleeve barrel to be cooled. The top ends of the heat conduction sleeves of the heat conduction protruding columns are fixed to the arc-shaped outer wall of the heat conduction arc plate, the top ends of the heat conduction columns extend into the heat conduction sleeves, and the heat conduction columns are driven by a heat conduction driving piece to vertically move up and down along the heat conduction sleeves so that the bottom ends of the heat conduction columns can extend below the liquid level of the heat exchange liquid or retract to the original positions. And