Cooling device for extrusion wheel of zinc-clad steel coating machine

The utility model relates to a cooling device for an extrusion wheel of a zinc-clad steel coating machine. The device comprises a supporting shell, a fixing plate, a gas cooling device and a water cooling device, the supporting shell is fixed to a production line body. A fixing plate is arranged on the supporting shell; an extrusion wheel is arranged on the fixed plate; the gas cooling device comprises a cooling shell, a gas nozzle, a gas inlet pipe, a first pump and a gas compression refrigerating machine. The cooling shell is arranged above the extrusion wheel; a plurality of air nozzles arearranged on the cooling shell; the arc top of the cooling shell is connected with an intake pipe; one end of the first pump is connected with the gas inlet pipe, and the other end is connected with the gas compression refrigerator; the water cooling device comprises a cooling pipe, a liquid inlet pipe, a liquid outlet pipe, a water storage tank, a second pump, a water cooling refrigerator and a third pump, a liquid inlet