Gas collector for collecting soil gas

Abstract

The invention relates to a soil gas collector, in particular to the field of equipment for collecting and measuring a trace amount of soil gas. In the technical scheme for fulfilling the aim of the invention, a gas collector for collecting the soil gas consists of a cone frustum-shaped air chamber body without a bottom surface, a tubular connecting ring and a tubular fixed pipe which are connected with one another sequentially, wherein the lower port of the cone frustum-shaped air chamber body is directly connected with one end of the tubular connecting ring; the upper end orifice of the tubular fixed pipe is connected with the other end of the tubular connecting ring in a sleeved type and is embedded into an inclined plane rubber seal ring which is arranged on the outer wall of the tubular connecting ring so as to ensure air tightness; and the lower end orifice of the tubular fixed pipe has a tool edge shape so as to be conveniently and directly inserted into soil. The soil gas collector provided by the invention is extremely convenient to manufacture, use and maintain, has low cost, can be suitable for different soil environments such as mountains, plains, wetlands and the like through sample plot investigation, is extremely flexibly used, meets the requirements of field environments and has accurate acquired data.

Description

technical field [0001] The patent of the present invention relates to a soil gas collector, in particular to the field of equipment for collecting and measuring soil trace gases. Background technique [0002] Commonly used measuring and collecting tools for the flux of a certain component of soil air are a cubic box with a length, width and height of about 80 cm, equipped with fans and air extraction holes, etc. When measuring, a body with an air chamber Π is pre-arranged. The square frame of the shaped groove is placed on the flat surface of the soil to be tested, and water is added to the Π shaped groove of the air chamber body to seal the air chamber. It is used to measure the flux of a certain component of soil air by pumping air from the air hole at regular intervals. The tool of this method is simple, but bulky and expensive, and it is not suitable for use in complex terrain such as mountains due to its large area. As the use time increases, the air pressure in the ga...

AI Technical Summary

Problems solved by technology

The tool of this method is simple, but bulky and expensive, and it is not suitable for use in complex terrain such as mountains due to its large area. As the use time increases, the air pressure in the gas chamber will change due to the absorption or emission of gas by the soil, which will give poor measurement results. have a greater impact

It also cannot be used in conjunction with the current general-purpose automatic greenhouse gas observation instrument; it makes it difficult to measure the consistency of fluxes of different components of the atmosphere in the same area, and brings large errors to the final measurement data

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