Pressure-balanced type portable device for soil gas collection

A soil gas and portable device technology, which is applied in the direction of sampling devices, etc., can solve the problems of constant carrying and many experimental error factors, and achieve the effects of convenient material collection, easy disassembly and carrying, and good sealing performance
CN102901657AInactive Publication Date: 2013-01-30INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Publication Date
2013-01-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a pressure-balanced type portable device for soil gas collection. The pressure-balanced type portable device comprises a gas collection box and a gas extraction device, wherein the gas collection box mainly comprises a top cover, a collection box and a base; a first piston is arranged in the top cover; and the base comprises an upper part and a lower part which are provided with an adjustable included angle. During a gas collection process, the internal pressure and the external pressure of the collection box are balanced via the up-and-down movement of the first piston, thus reducing the influence of the pressure change in the collection box on the emission of soil gas, ensuring observation accuracy, and shortening observation time; and particularly, the pressure-balanced type portable device is small in sampling area and good in sealing performance. The pressure-balanced type portable device disclosed by the invention can also be applied to a slope environment with a certain angle by designing the base to be an upper base and a lower base which have an adjustable angle. Additionally, the pressure-balanced type portable device disclosed by the invention also has the advantages of being convenient in getting materials, easy to detach and carry, simple to operate, etc.
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Description

technical field

[0001] The invention relates to a collection and observation system of soil respiration flux that can be used in laboratory control conditions, in the field, and in farmland, and in particular relates to a soil respiration flux suitable for common farmland soil, slope soil, greenhouses and other facility agricultural soils and potted environmental pressures. Balanced soil gas collection device. Background technique

[0002] Flux is the amount of material passing through a unit area per unit time. Soil respiration flux refers to the change of gas mass emitted by soil per unit area and per unit time. Soil respiration flux is an important basis for studying soil microbial processes, greenhouse gas emissions and climate change.

[0003] Soil respiration studies mostly use closed static chambers. The static box method in the traditional sense is: using the principle of gas flux, a chemically stable box with known volume and bottom area is directly inserted into...

Claims

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