Drying oven draught fan bearing cooling water circulation device

The utility model relates to a drying oven draught fan bearing cooling water circulation device. The drying oven draught fan bearing cooling water circulation device comprises a water tank arranged above a draught fan bearing box, the water tank is supported through a support, a water inlet is formed in the upper portion of the water tank and is connected to a water inlet pipe, a ball float valve is arranged on the water inlet pipe, a floating ball is arranged in the water tank, and the two ends of the bottom face of the water tank are each provided with a water passing opening, and water pipes are connected to the water passing openings and are connected with cooling water connectors of the draught fan bearing box respectively. The drying oven draught fan bearing cooling water circulation device is simple in structure and stable in work, and is an automatic circulation system free of any source and maintenance. The circulation water consumption amount is the naturally-evaporating water amount, and the water consumption amount is basically zero. In this way, waste of cooling water is avoided, and the effects of reducing the cost and improving the efficiency are achieved.