Groundwater sample collection device and method for multi-channel monitoring well

Abstract

The invention provides an underground water sample collecting device and method for a multichannel monitoring well. The collecting device comprises N sample collecting and storing units and a multi-distributing valve; the sample collecting and storing units are used for containing N collected underground samples, and water inlets of the sample collecting and storing units extend to corresponding selected sampling positions of the multi-channel monitoring well; the multi-distributing valve is provided with N+1 ports, one port is connected with a pump, and the other N ports are connected with water outlets of the N sample collecting and storing units respectively; the water outlets and the water inlets of the N sample collecting and storing units are each provided with a water stop valve, wherein N is a positive integer larger than or equal to 2. According to the device, the sampling time of the nested multi-channel monitoring well can be shortened, and the outdoor underground water sampling working efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of groundwater environment monitoring, and in particular relates to a groundwater sample collection device for a multi-channel monitoring well, and a collection method using the collection device. Background technique [0002] At present, with the continuous improvement of groundwater environmental monitoring requirements and the mastery and accurate description of the distribution characteristics of groundwater pollution, different types of multi-level monitoring wells have been developed. Nested multi-channel monitoring well is a new type of multi-level monitoring well. It can provide multiple different monitoring areas, and a continuous multi-channel monitoring well can be equivalent to multiple single-pipe monitoring wells. The nested multi-channel tube monitoring well realizes the purpose of monitoring multi-layer groundwater in a single borehole, and is cost-saving, economical and practical. It plays...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of multi-channel continuous monitoring wells, the number of each monitoring hole is large and the aperture is small, the existing groundwater sampling equipment cannot quickly realize the simultaneous collection of porous samples

In addition, the small-diameter inertial pump can collect water samples from multi-channel monitoring wells, but due to its operating power, it will stir the groundwater in the multi-channel monitoring holes, thereby affecting the representativeness of groundwater samples

Therefore, the current groundwater sampling equipment mainly has problems such as long sampling time and large disturbance when collecting multi-channel monitoring wells.

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