Nuclear power station condenser seawater expansion joint, expansion joint preparation mold and preparation method

The invention belongs to the technical field of rubber composite material forming, and particularly relates to a nuclear power station condenser seawater expansion joint, an expansion joint preparation mold and a preparation method thereof. The expansion joint comprises a pressing ring, a fixing bolt, a flange and a rubber body, the pressing ring, the flange and the rubber body are of a one-time pouring forming structure, and the flange is connected with a pipeline. One end of the rubber body is located between the flange and the pressing ring, a concave space is formed by the two opposite faces of the flange and the pressing ring, and the concave space is matched with the shape of the end of the rubber body; the flange is fixedly connected with the pressing ring through a fixing bolt. The manufacturing mold is precise in mechanical assembly, manufacturing of the expansion joint can be safely and efficiently completed, and the manufacturing time and the supply cycle of the expansion joint are shortened to the