Modular device capable of realizing multilayer liquid taking in saturated or unsaturated soil

Abstract

The invention discloses a modular device capable of realizing multilayer liquid taking in soil. The modular device comprises a casing, an inner core and a liquid taking device, wherein the inner coreis a liquid collection component; the inner core comprises a connecting pipe, a liquid collecting cabin and a top cover in mutual connection. By selecting connecting pipes with different lengths and different quantity, the water taking depth can be regulated; the limitation by measuring point positions and soil layer number is avoided; the flexibility and the application range of the device are improved; a plurality of liquid passing holes are formed in the side wall of the liquid collecting cabin and the connecting pipe; a liquid taking passage is formed inside the liquid collecting cabin; liquid blocking plugs are arranged at the upper and lower ends of the liquid taking passage; the influence on the free flowing of liquid in the soil can be reduced through the liquid passing holes; theliquid blocking plugs ensure the liquid in the connecting pipe and the liquid collecting cabin not to be mixed during the liquid collection and the liquid taking; the structural design is favorable for improving the sampling representativeness; the liquid can be taken when the liquid taking device extends into the liquid taking passage; the operation is convenient; the sampling is fast and accurate.

Description

technical field [0001] The invention relates to the technical field of water conservancy test equipment, in particular to a modular device capable of taking liquid in saturated or unsaturated soil in multiple layers. Background technique [0002] Studying the migration law of heavy metals in multi-layered soils has far-reaching significance for the impact evaluation and treatment of polluted surfaces, and the study of heavy metal migration laws usually requires the measurement of the concentration of heavy metals in the leachate of different soil layers. At present, most of the methods for measuring the concentration of heavy metals in soil leachate are to extract leachate from the soil for analysis. Conventional extraction devices cannot extract multiple leachates at different heights in a vertical direction. Some devices achieve the purpose of extracting leachate at different points in the soil by pre-burying negative pressure suction heads in the soil, and each suction he...

AI Technical Summary

Problems solved by technology

At present, most of the methods for measuring the concentration of heavy metals in soil leachate are to extract leachate from the soil for analysis. Conventional extraction devices cannot extract multiple leachates at different heights in a vertical direction.

Some devices achieve the purpose of extracting leachate at different points in the soil by pre-burying negative pressure suction heads in the soil, and each suction head is connected to an infusion tube. Long, many pipelines have seriously affected the normal flow of liquid in the soil, the leachate obtained by negative pressure cannot represent the normal flow of liquid, and the location of the liquid will change due to the flow of liquid in the soil for a long time, As a result, the leachate extracted by it has no positional representation

There are also some improved devices, which are tubular main bodies, and the inside of the main body is divided into several water collecting compartments, and the leachate in the compartments is sucked out through the conduits equipped in each compartment, such as the Chinese invention patent of CN 107588982 A, but this device Constrained by the length of the conduit, the number of layers that can be collected is limited; this device does not consider the filtration of soil, and the soil will accumulate in the liquid collection bucket after long-term use and lose the water collection function; the main body of this device has no water permeability function and cannot maximize Effect of Minimizing Devices on Seepage Flow in Soil

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