Water cooling device for balancing temperature of head and tail of continuous casting billet

The utility model belongs to the field of temperature control of continuous casting billets in the metallurgical industry, and particularly relates to a water cooling device for head and tail temperature equalization of continuous casting billets. The cooling device comprises a plurality of annular cooling headers which are coaxially arranged, the annular cooling headers are connected with a water inlet pipe, and a plurality of nozzles are arranged on the inner sides of the annular cooling headers. When the continuous casting billet sequentially passes through the interiors of the annular cooling headers, the annular cooling headers spray water to the continuous casting billet for cooling through the nozzles, and the uniformity of the temperature of the head and the tail of the continuous casting billet is guaranteed by controlling the water spraying starting and ending time and the water spraying flow of the nozzles of the annular cooling headers. In the cooling process, the continuous casting billets are tr