Sealing protection structure of road and bridge expansion device

The invention discloses a sealing protection structure of a road bridge expansion device, and relates to the technical field of roads and bridges. Comprising a beam body and a telescopic device, a rubber strip is fixed to the telescopic device, according to the sealing protection structure of the road bridge telescopic device, when a rubber protection plate is installed, the rubber plate extends into an expansion joint, then a push handle can be pressed, a first spring is compressed, a push rod moves downwards, a limiting block moves downwards, and therefore the rubber protection plate is installed. The side, close to the control mechanism, of a limiting block is provided with an inclined face, when the limiting block moves to the top of a semicircular block, the limiting block extrudes the semicircular block, the limiting block is far away from a rubber strip due to extrusion force, when the limiting block moves to the bottom of the semicircular block, a second spring is in a stretching state, and then the t