Air cylinder type soil profile gas collector

Abstract

The invention relates to an air cylinder type soil profile gas collector. The air cylinder type soil profile gas collector comprises a piston handle, a dust cap, a protective sleeve, a rubber piston, a suction pipe, a miniature vacuum pump, a gas collection bag, a gas outlet pipe with a needle, a replaceable type filter, a single-channel gas outlet valve and a gas collection pipe, wherein a certain range of gas inlet micro pores are uniformly distributed on the wall on the lower part of the protective sleeve, and the top of the gas collection pipe is connected with the single-channel gas outlet valve. According to the air cylinder type soil profile gas collector, blockage interference of soil particles, water and ice to the gas inlet micro pores can be avoided; soil greenhouse gas within a depth range can be collected, and meanwhile, outside atmosphere can be avoided entering the gas collection pipe; and mobile gas suction equipment consisting of the miniature vacuum pump and the like is utilized to suck gas to increase the quantity of collected gas, so that test errors can be further eliminated, and the test precision can be improved. The air cylinder type soil profile gas collectors can be distributed in soil of different depths to collect soil greenhouse gas of different depth ranges so as to regularly monitor greenhouse gas concentrations of soil profiles within various depth ranges. The air cylinder type soil profile gas collector has the advantages of simple structure and convenience in operation and is suitable for simultaneous observation of multiple points.

Description

technical field [0001] The invention relates to the technical field of test instruments and equipment, in particular to an air cylinder type soil profile gas collector. Background technique [0002] As we all know, it is an indisputable fact that the change of the earth's climate system is mainly characterized by climate warming. Under the background of climate warming, the permafrost in the Qinghai-Tibet Plateau is degraded to varying degrees, which may cause a large amount of soil organic carbon and nitrogen in the permafrost area to be released in the form of greenhouse gases (such as CO 2 and N 2 O, etc.) into the atmosphere, showing a positive feedback effect, therefore, the study of the Qinghai-Tibet Plateau permafrost soil greenhouse gas generation mechanism and influencing factors has important practical significance for controlling greenhouse gas emissions and protecting the ecological environment in permafrost regions. During the period when soil freeze-thaw proc...

AI Technical Summary

Problems solved by technology

Since the soil in the permafrost active layer of the Qinghai-Tibet Plateau often undergoes alternating freeze-thaw interactions, when the soil water freezes into ice, it often blocks the air intake holes for gas collection, which brings great challenges to the application of other porous soil gas collectors in this area. obstacle

At present, researchers have used a single stomata to monitor soil gas samples at different depths, but since it only represents soil gas at a certain depth, it is difficult to combine it with soil physical and chemical properties in a specific depth range to analyze the mechanism of greenhouse gas generation and Influencing factors, which bring a lot of error and uncertainty to the test results

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