Well pipe device and method for groundwater layered sampling

Abstract

The invention discloses a well pipe device and method for groundwater layered sampling. The device comprises a pipe body formed by connecting more than one well pipe end to end; multiple sets of through sieve holes are formed in the same heights of the side walls of the well pipe; each set of the sieve holes is longitudinally arranged; hollow annular clamping grooves are further formed in the inner wall of the well pipe; the upper arms and the lower arms of the clamping grooves are fixed on the inner wall of the well pipe; the upper arms are located above the sieve holes, and the lower arms are positioned below the sieve holes, so that the sieve holes are surrounded; openings are reserved in the side walls of the clamping grooves; water check valves corresponding to the multiple sets of the sieve holes are arranged in the clamping grooves; and an outer operating rod penetrates through the openings to be clamped with the water check valves, and the operating rod is transversely rotated,so that the water check valves can slide in the clamping grooves, and groundwater with different depths is introduced into the well pipe for sampling.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a well pipe device and method for layered sampling of underground water. Background technique [0002] Groundwater pollution is the deterioration of groundwater quality due to human factors. Polluted groundwater is harmful to human health, industrial and agricultural production, and the ecological environment. The strata below the surface are complex, and groundwater flows extremely slowly. Therefore, groundwater pollution has the characteristics of pollution stratification, slow pollution migration, strong pollution concealment, and difficult restoration and treatment. There are some obvious differences between groundwater pollution and surface water pollution: because pollutants enter the aquifer and move slowly in the aquifer, pollution often occurs gradually, and it is difficult to detect it in time without special monitoring. [0003] Most of t...

AI Technical Summary

Problems solved by technology

There are some obvious differences between groundwater pollution and surface water pollution: because pollutants enter the aquifer and move slowly in the aquifer, the pollution often occurs gradually, and it is difficult to detect it in time without special monitoring

[0003] Most of the existing groundwater monitoring well construction devices and sampling methods can only be used to monitor a certain point and a specific aquifer, and the groundwater quality varies in concentration or pollution at different depths at the same location, and mixed water samples cannot be well analyzed. Reflect groundwater conditions

In recent years, in the field of groundwater investigation and monitoring, composite wells or integrated monitoring well devices or other fixed-depth sampling devices have been developed to monitor groundwater at different depths at the same location. However, the construction cost of composite wells is high and integration The structure of the monitoring well device is complex, the requirements for well construction are high, and the cost of well construction is relatively high. The groundwater collected by the fixed-depth sampling device is not a real in-situ groundwater sample. The above devices and methods are greatly affected by the layered sampling of groundwater. limit

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