Special tool for assembling three shells of high-temperature gas cooled reactor nuclear power station and mounting method

The invention relates to the technical field of high-temperature gas cooled reactors, in particular to a special tool for assembling three shells of a high-temperature gas cooled reactor nuclear power station and a mounting method. The invention provides a high-temperature gas cooled reactor nuclear power station three-shell assembly installation method which comprises the following steps: assembling an assembly platform and an installation trolley: assembling the assembly platform between a pressure vessel cabin and a steam generator cabin, and then installing the installation trolley on the assembly platform; assembling and mounting the hot air conduit section I and the metal reactor internals: hoisting the hot air conduit section I to a mounting trolley, and moving the mounting trolley to assemble and mount the hot air conduit section I and the metal reactor internals; the second hot air guide pipe section and the first hot air guide pipe section are installed in pairs. According to the method, various pro