Dewdon’s buried protective device for flexible rubber expansion joint, mainly cooperatively use with flexible rubber expansion joint, efficiently protect the rubber joint from being damaged by external force, it greatly lengthen the service life of rubber joint.

The buried protective device is assembled by two semicircle hollow molding, put rubber joint and pipeline slap on flange in the protective device, the steel belts on both ends ride on inscribed circle of flange, playing the function of supporting facade on both ends, it depends on soil depth, sufficient to bear external pressure. Both ends of the buried protective device are free to slide, without any resistance.