Underground water stratified sampling device

Abstract

The invention relates to an underground water stratified sampling device which comprises a sampling barrel with a fixing frame, a sampling inner pipe and a sampling outer pipe, and the sampling barrel is in threaded connection with the sampling outer pipe; wherein a plurality of partition plates are arranged in the sampling inner tube, the inside of the sampling inner tube is divided into a plurality of sampling cavities by the partition plates, a sampling air bag is arranged in each sampling inner cavity, an air pipe is arranged in the sampling inner tube, each sampling air bag is communicated with an air pump arranged on the fixing frame through the air pipe, a plurality of sampling inner holes are formed in the sampling inner tube, and at least one sampling inner hole is formed in the side wall of each sampling cavity; a plurality of sampling outer holes are formed in the sampling outer pipe, and the sampling outer holes in the sampling outer pipe correspond to the sampling inner holes in the sampling inner pipe one by one; a plurality of filtering windows are arranged on the sampling barrel, and each filtering window corresponds to the sampling outer hole in position; a balancing weight is arranged at the bottom of the sampling outer pipe. By means of the device, water samples of different aquifers can be collected from a single sampling well, the device is suitable for a phreatic bed of a single structure and a confined aquifer of a multi-layer structure, and the occupied area of a drill hole and the construction cost can be effectively saved.

Description

technical field [0001] The invention relates to the technical field of sampling devices, in particular to an underground water layered sampling device. Background technique [0002] Groundwater sampling technology is the core of groundwater monitoring. However, due to the existence of relatively impermeable layers in the stratum structure, the groundwater also layers accordingly, and the indicators and components of water in each layer are also different. Therefore, layered sampling is required to avoid mixing. In order not to interfere with each other, resulting in inaccurate analysis of the results. [0003] At present, the methods for realizing sampling at different levels are: (1) multi-well monitoring sampling, that is, drilling many wells with different depths in the site to realize monitoring sampling at different levels; (2) multi-well monitoring sampling, that is, Sampling pipes of different depths are arranged in a wellbore to the selected monitoring sampling laye...

AI Technical Summary

Problems solved by technology

In the above two methods, the former requires a large number of drilling holes, so the construction cost and maintenance cost are high; although the latter can reduce the number of drilling holes and save costs, it is difficult to seal and stop the water of multiple sampling pipes. may affect each other, resulting in distortion of monitoring data

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