Automatic cooling internal circulation device for hot water tank of optical cable production line

The utility model discloses an optical cable production line hot water tank automatic cooling internal circulation device which comprises a hot water tank body, a cold water tank and a cooling-water machine, a cold water tank is connected between the hot water tank body and the cold water tank, the cooling-water machine is placed on the right side of the cold water tank, the right side of the cold water tank is connected with a connecting pipe, and one end of the connecting pipe extends into the cooling-water machine. A first pump is connected to the top in the cooling-water machine, one end of the first pump is connected with a cold water pipe, an electromagnetic valve is arranged on the cold water pipe, and one end of the cold water pipe extends into the hot water tank body. The temperature controller in the hot water tank body is used for monitoring the temperature in the hot water tank body, the electromagnetic valve is controlled by a cooling signal given by the temperature controller, when the water tem