Field evaporation-preventing rainfall hydrogen and oxygen isotope sample collecting device

The utility model belongs to the technical field of rainfall collection, and relates to a field anti-evaporation rainfall oxyhydrogen isotope sample collection device which comprises a box body, a beveled cylindrical enclosure and a funnel are arranged above the box body, and louvre blades are mounted on the beveled cylindrical enclosure; the top cover of the box body is provided with anti-bird thorns; a first flow deflector, a second flow deflector and a plurality of water collecting bottles are arranged in the box body; a flow guide pipe A, a flow guide pipe B and a flow guide pipe C are sequentially connected below the funnel from top to bottom; the flow guide pipe A and the flow guide pipe B are connected through a sand core filter; an inclined hole is prefabricated in the first flow deflector, a plurality of water inlet holes are prefabricated in the second flow deflector, and each water inlet hole is connected with the water collecting bottle through a flow guide pipe C; a bottle cap is arranged on the