Stable self-locking anti-settling well

The stable self-locking anti-settling well comprises a well frame and a well lid, the upper end of an inner cavity of the well frame protrudes towards the middle to form an inner protruding ring, a supporting ring is arranged below the inner protruding ring, two supporting rods which are symmetrically arranged front and back are arranged below the supporting ring, the supporting rods are transversely arranged, and two connecting rods which are arranged left and right are hinged to the supporting rods; a rectangular groove is upwards formed in the middle of the bottom face of the well lid, the right side of the rectangular groove communicates with the right end face of the well lid, sliding grooves are symmetrically formed in the upper portions of the front side and the rear side of the rectangular groove, sliding rods capable of sliding left and right are installed in the sliding grooves in a matched mode, and the bottom faces of the sliding rods are hinged to the upper ends of the connecting rods. The novel