Isotope sample collection device for inhibiting evaporation and exchange of water sample

Abstract

The invention belongs to the technical field of isotope collection devices, and particularly relates to an isotope sample collection device for inhibiting evaporation and exchange of a water sample. The isotope sample collection device comprises a sample storage container, a funnel and a water guide pipe, wherein the sample storage container and the funnel are hermetically connected through the water guide pipe, the top end of the water guide pipe is hermetically communicated with a water leakage port at the bottom of the funnel, and a floating ball is placed at the bottom of the funnel; the bottom end of the water guide pipe extends into the bottom end of the sample storage container, a thread is arranged on the outer surface of the bottom end of the water guide pipe, a water outlet hole is formed above the thread, the bottom end of the water guide pipe is sleeved with a closed sleeve, and a thread is arranged at the bottom end in the closed sleeve and is matched and screwed with the thread at the bottom end of the water guide pipe; the bottom end of the funnel is further communicated with a pressure relief pipe which is arranged at the bottom of the floating ball, and the other end of the pressure relief pipe is communicated with the sample storage container. A small amount of rainfall is stored in the water guide pipe for the first time to form a small liquid level, and large-area water sample evaporation is avoided; the arrangement of the pressure relief pipe enables all rainfall in the funnel to flow into the sample storage container.

Description

technical field [0001] The invention belongs to the technical field of isotope collection devices, in particular to an isotope sample collection device that suppresses evaporation and exchange of water samples. Background technique [0002] Although the monthly cumulative sample collection devices used in the isotope monitoring of atmospheric precipitation in the past are relatively simple to manufacture, they all have defects to varying degrees. For example, the regional applicability is not strong, the prevention of water sample evaporation and exchange is not complete, or the operation is inconvenient, etc., none of which is generally recognized and promoted. [0003] Among the several sampling devices currently used, the oil-film-enclosed device is inconvenient to operate for oil-water separation, especially a small amount of water sample is more difficult to separate; when the ball-sealed sampling device is used in forested areas or areas with strong sandstorms, it is o...

AI Technical Summary

Problems solved by technology

Such as poor regional applicability, incomplete prevention of evaporation and exchange of water samples, or inconvenient operation, etc., none of them has been widely recognized and promoted.

[0003] Among the several sampling devices currently used, the oil-film-enclosed device is inconvenient to operate for oil-water separation, especially a small amount of water sample is more difficult to separate; when the ball-sealed sampling device is used in forested areas or areas with strong sandstorms, it is often damaged by foreign objects falling into it. The ball seal fails, and because the floating ball can only be floated when more than a certain amount of rainwater is used, there is always a small amount of retained water that cannot flow into the plastic bucket after each precipitation process; after the retained water is partially evaporated, it is brought into the container by subsequent rainfall; Bag-tube type sampling device, because the pressure generated by the inflow of rainwater in the early stage will prevent the rainwater from continuing to flow in later, so the bag or barrel must have vent holes, once the vent holes are left, the water in the bag or barrel will evaporate partly ,

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