Hinge jacking type rail bridge expansion device

The utility model belongs to the technical field of rail bridges. The utility model relates to a telescopic device, in particular to a hinge jacking type rail bridge telescopic device. Wherein the first sectional material and the second sectional material are arranged on the two sides of an expansion joint respectively, and the waterproof adhesive tape is arranged between the first sectional material and the second sectional material. A first opening is formed in one side, close to the second profile, of the first profile; one end of the waterproof adhesive tape extends into the first opening;a second opening is formed in one side, close to the first profile, of the second profile; the other end of the waterproof adhesive tape extends into the second opening, clamping assemblies used forclamping the waterproof adhesive tape are arranged in the first opening and the second opening respectively, the clamping assemblies are quadrilateral hinge mechanisms, each quadrilateral hinge mechanism is provided with at le