Deep groundwater heavy metal content detection device

Abstract

The invention discloses a deep groundwater heavy metal content detection device, belongs to the field of groundwater, and adopts the scheme that a sampling device stably slides up and down in a pre-drilled hole when a screw rod rotates, and is in a closed state between a normal-temperature fixed cylinder and a sliding cylinder; the sealing effect between the fixed barrel and the sliding barrel isimproved, and blockage caused by dust entering the fixed barrel is reduced; when the shape memory spring is deformed due to heat, the telescopic rod is stretched through the shape memory spring, so that the sliding barrel is separated from the fixed barrel, and underground water enters the sampling barrel through the water inlet hole; groundwater in the sampling barrel is effectively prevented from leaking through a water inlet through absorbent cotton, and when the groundwater is sampled in the sampling barrel, the groundwater melts edible gelatin, so that the interior and the periphery of the sampling barrel are cooled instantly, and the shape memory spring deforms in a cold state, so that the telescopic rod contracts, and the fixed cylinder and the sliding cylinder are mutually closed.

Description

technical field [0001] The invention relates to the field of groundwater, in particular to a device for detecting heavy metal content in deep groundwater. Background technique [0002] According to the laws and regulations of our country, before redevelopment and utilization of the land used by industrial enterprises left after the closure and relocation, it is necessary to carry out the soil and groundwater pollution survey of the plot according to the relevant national technical specifications, and carry out risk assessment in combination with the future land use planning of the site. The investigation of groundwater pollution is currently mainly done by collecting typical groundwater samples for pollutant detection to characterize its pollution status. Due to the anisotropic spatial heterogeneity of site hydrogeology, the vertical distribution of pollutants in groundwater usually has obvious inhomogeneity , especially for sites with thicker aquifers, the phenomenon of une...

AI Technical Summary

Problems solved by technology

[0003] The traditional way to collect typical groundwater samples at different depths is to set up group wells at the same monitoring point, and set screens at different depths in the aquifer to achieve the purpose of collecting typical groundwater samples at different depths. The cost of drilling and building wells is relatively high. For example, the buried depth of groundwater is deep, the aquifer is thick, and the cost increase is more obvious, which has become the main obstacle restricting the popularization and application of this technology. The volume of water is large, it takes a long time to wash the well before sampling, the sampling efficiency is reduced, and more waste water from well washing is generated, which further increases the application cost of this technology

Images