Water-cooling compression roller and water-cooling system of chain type casting machine

The utility model relates to the technical field of casting machines, and discloses a chain type casting machine water cooling compression roller and a water cooling system, which comprise a roller body, the roller body is of a tubular structure, the roller body is in rolling contact with a mold and is used for flattening molten iron accumulated on the surface of the mold, two ports of the roller body are provided with hollow shafts for injecting circulating cold water, and the hollow shafts are concentric with the roller body. The side wall of the hollow shaft is rotationally connected with a pipe joint, the pipe joint comprises an L-shaped plate, a second sealing bearing rotationally connected with the hollow shaft is arranged on the end face of the vertical section of the L-shaped plate, a conical cap with threads is arranged at the position of the second sealing bearing on the end face of the L-shaped plate and used for being connected with a water pipe, and the horizontal section of the L-shaped plate is