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Multi-point instantaneous synchronous sampling device for gas in unsaturated zone for polluted soil column test

A technology for synchronous sampling and testing, applied in the direction of sampling devices, etc., can solve the problems that there are no indoor geotechnical test batches, synchronous gas sample collection devices, etc., and achieve the effect of simple structure and convenient operation

Active Publication Date: 2018-07-17
SOUTHEAST UNIV
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Problems solved by technology

[0005] Technical problem: Collecting gas in soil for analysis is a commonly used analysis and testing method in environmental geotechnical tests. The existing gas sampling devices for organic pollution geotechnical tests are all aimed at field tests. At present, there is no batch synchronization for indoor geotechnical tests. gas sampling device

Method used

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  • Multi-point instantaneous synchronous sampling device for gas in unsaturated zone for polluted soil column test
  • Multi-point instantaneous synchronous sampling device for gas in unsaturated zone for polluted soil column test

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] The invention relates to a multi-point instantaneous synchronous sampling device for unsaturated gas in a polluted soil column test. The device is mainly composed of a suction syringe, a three-way needle system and a linkage plate. The air extractor is mainly composed of a light and high-strength stainless steel hollow cylinder, a piston, a piston shaft and a piston handle. The three-way needle system is mainly composed of a connecting chamber, a needle connecting tube, a control valve, a sampling needle, a gas treatment and a gas collection device. The linkage plate is mainly composed of the left linkage plate of the air extractor, the right linkage plate of the air extractor and the piston rod linkage rod. Existing gas sampling devices for geotechnical tests of organically polluted soil are all aimed at field tests. At present, there is no device for unsatura...

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Abstract

The invention relates to an unsaturated zone gas multi-point instant and synchronous sampling device for a polluted soil column test. The device comprises a suction barrel, a three-directional needle head system and a linking plate, wherein the suction barrel comprises a piston shank (1), an empty barrel (3), a piston shaft (2) positioned between the piston shank (1) and the empty barrel (3), a piston (4) which is positioned at the bottom of the empty barrel (3) and is connected with the piston shaft (2), and a nipple plate (5) positioned at the periphery of the bottom of the empty barrel (3); and the three-directional needle head system comprises an activated carbon column (6), a joint switching pipe (7) connected with the activated carbon column (6), an exhaust valve (8) connected with the joint switching pipe (7), a four-directional joint (9) connected with the exhaust valve (8), and a gas collection valve (13) connected with the four-directional joint (9) from top to bottom. A three-directional sampling needle and the linking plate are used for implementing a linking gas sampling device applicable to an indoor soil test for organic polluted soil.

Description

technical field [0001] The invention relates to a gas collection device for geotechnical tests, in particular to a gas linkage collection device for indoor geotechnical tests of organic polluted soil. Background technique [0002] In recent years, with the acceleration of China's industrialization and urbanization process and the adjustment of the country's industrial layout, a large number of industries have moved out of the main urban area, and the remaining industrially polluted sites need to be treated and redeveloped into a living environment. In these industrially polluted sites, organic pollution occupies a considerable proportion. For example, leakage of underground oil storage facilities and oil pipelines causes organic compounds to pollute soil and groundwater. Organic pollutants are industrial pollutants with a wide range of pollution and great harm. . [0003] Among the organic pollutants entering the soil, volatile organic pollutants and semi-volatile organic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/24
CPCG01N1/24
Inventor 毛柏杨刘志彬刘松玉
Owner SOUTHEAST UNIV
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