Self-locking well lid

The utility model discloses a self-locking well lid which comprises a well lid body covering an opening of a well body. A plurality of lock hooks are arranged on the bottom face of the well lid body along the edge, and the opening directions of the lock hooks all point clockwise or anticlockwise. A plurality of fixing blocks formed by protruding in the radial direction are arranged on the inner wall of the well lid body, and when the well lid body rotates in the opening direction of the lock hook, the lock hook can hook the fixing blocks in a clamping mode. The locking device has the advantages of being good in locking effect and easy to operate. 本实用新型公开了一种自锁井盖，包括封盖在井体开口处的井盖盖体；所述井盖盖体的底面沿边缘处设有多个锁钩，所述锁钩的开口方向均沿顺时针或逆时针指向；所述井体内壁上具有多个沿径向凸起形成的固定块，所述井盖盖体沿着锁钩的开口方向转动时，所述锁钩可卡勾住固定块。本实用新型的有益效果在于，具有较好的锁定效果、操作简单。