Spraying device of billet caster

The utility model provides a spraying device of a billet caster. The spraying device is composed of a hanging frame, an installation base, an upper square frame, a lower square frame, a spraying tube and a pin shaft. The hanging frame is installed on an inner arc lateral steel structure, and the installation base and the hanging frame are adjusted to the proper positions and then connected in a welding mode. The upper square frame and the lower square frame are connected through a bolt and respectively installed on the installation base. A suspended support plate is welded onto the upper square frame, an open type fixed base is welded onto the lower frame, a cylindrical hanging rod is welded at the upper end of the spraying tube and hung in the suspended support plate of the upper square frame, the spraying tube is in movable connection with the upper end hanging rod, and the lower end hanging rod of the spraying tube is inserted into the open type fixing base of the lower square frame and fixedly connected t