Device for in-situ liquid taking and hydrochemistry adjustment of high-temperature and high-pressure water loop

The utility model discloses a device for in-situ liquid extraction and hydrochemistry regulation of a high-temperature and high-pressure water loop, which comprises a liquid storage tank, a filler structure and a branch pipeline, the filler structure comprises a filler tank, a first valve and a second valve, the inlet of the filler tank is connected with the liquid storage tank, and the outlet of the filler tank is connected with the liquid storage tank; the branch pipeline is connected with the packing structure in parallel, and a branch valve is arranged on the branch pipeline. When the liquid needs to be taken and the hydrochemistry needs to be adjusted, the first valve and the second valve are closed, the branch valve is opened, the liquid in the liquid storage tank flows through the branch pipeline and then flows back, the adjusting opening is opened, the liquid can be taken and solution ions or particles can be added, then the first valve and the second valve are opened, the branch valve is closed, and