Split type gas displacement type underground water sampler

A gas replacement and groundwater technology, applied in the direction of sampling devices, etc., can solve problems such as overflow, gas, and large disturbance of groundwater, and achieve the effects of low gas pressure, high sampling efficiency, and small gas consumption
CN101718640AInactive Publication Date: 2010-06-02NORTHWEST INST OF NUCLEAR TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHWEST INST OF NUCLEAR TECH
Publication Date
2010-06-02
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a split type gas displacement type underground water sampler which comprises a sample containing pipe, an inflation and deflation unit and a water acquirement pipeline; the inflation and deflation unit comprises an air source, an air pipe and an air pressure controller, the upper end of the sample containing pipe is communicated with the inflation and deflation unit, and the water acquirement pipeline comprises a water outlet pipe. The underground water sampler also comprises a sampling unit, wherein the sampling unit comprises a water outlet non-return valve, a tee and a water inlet non-return valve which are sequentially communicated from top to bottom; the water acquirement pipeline also comprises a hose which is communicated with the lower end of the sample containing pipe and a middle outlet of the tee, and the water outlet non-return valve is communicated with the water outlet pipe. The invention solves the technical problems of large disturbance of underground water, existence of a gas spilling phenomenon and the like during sampling. The invention realizes the sampling of the underground water under the conditions of low air pressure and small gas quantity and has the advantage of high sampling efficiency.
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Description

technical field

[0001] The invention relates to a ground water sampler, in particular to a gas displacement type ground water sampler. Background technique

[0002] In the investigation of groundwater pollution, obtaining representative groundwater samples from monitoring wells is the first step in investigation and monitoring. At present, the types of groundwater samplers mainly include: bucket sampler, negative pressure lift sampler, gas displacement sampler, pneumatic impeller pump, electric submersible pump, inertial lift pump, etc. (1.ASTM standard: D6634Standard guide for the selection of purging and sampling devices for groundwater monitoring wells; 2. Zheng Jitian, Wang Jianzeng, A Review of Overseas Groundwater Pollution Survey Sampling Techniques, Survey Science and Technology http: / / 171.131.80.13 / kns50 / Navi / Bridge.aspx?DBCode=cjfd&LinkType=BaseLink&Field= The BaseII sampler uses the pressure of the gas to drive the groundwater to the ground. It is composed of a p...

Claims

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