Automatic temperature control device for knurling wheel of calender

The utility model relates to an automatic temperature control device for a knurling wheel of a calender, which comprises a knurling wheel, a water freezing pipe, a water return pipe and an internal circulation pipe; one end of the internal circulation pipe is connected with the water freezing pipe, and the other end of the internal circulation pipe is connected with the water return pipe; the two ends of the knurling wheel are connected with the internal circulation pipe; the internal circulation pipe is provided with a temperature probe; the water return pipe is provided with a water outlet electromagnetic valve; and a controller which receives a temperature signal of the temperature probe to control the work of the water outlet electromagnetic valve is connected with the temperature probe and the water outlet electromagnetic valve. Compared with the prior art, when the water temperature in the internal circulation pipe is higher than a set value, the temperature probe sends a temperature signal to the contr