Roller rotary type bridge column anti-collision protection device

The utility model provides a roller rotary type bridge column anti-collision protection device. Bridge and pier column, the lower parts of the pier columns are connected through bearing platforms; protective layers are arranged on the outer sides of the pier column and the bearing platform; the protective layer is divided into a plurality of protective blocks; the protective blocks are provided with lock catches, every two adjacent protective blocks are connected through the lock catches, a protective layer formed by connecting the protective blocks can surround the pier column or the bearingplatform by a circle, the inner sides of the protective blocks are connected with idler wheels through pins, and the idler wheels are tightly attached to the pier column and the bearing platform and can rotate clockwise or anticlockwise around the pier column or the bearing platform when the pier column collides with a ship. The device can automatically rotate under the action of external force; therefore, the direction o