Collecting device of different depth soil gas

Abstract

The invention relates to a collector for collecting gas at different depths soil, which has a structure that the top end of a gas collecting tube is tip-shaped and closed with a plurality of pores arranged around the tip of the gas collecting tube which is connected with a connecting tube, the other end of the connecting tube is connected with a tee the other end of which is connected with the front end of an injector. The invention solves the defect existed in the prior soil gas collecting box and gas collecting bag. The invention, which can adapt different climate condition and meet the requirement of extensively collecting gas at different depths soil, reduces disturbance to soil, has the advantages of unnecessary of preembedding and additional power, simple structure, convenient operation, low cost, time saving and labor saving, and adaptability for simultaneously multi-point observation.

Description

technical field [0001] The invention relates to soil gas diffusion and soil greenhouse gas emission, in particular to a collection device for collecting soil gas at different depths. Background technique [0002] Prior to the present invention, research on soil gas diffusion characteristics and soil greenhouse gas emissions often required accurate measurement of soil gas composition and concentration, and accurate collection of soil gas samples was an important prerequisite. The existing collection methods and their defects mainly include: [0003] 1. Use soil gas collection box, including gas collection box, gas collection bag, suction pump, gas collection tube, protection tube, etc. The collection method is to insert the gas collection tube into the protective tube, use an air suction pump to cause negative pressure in the gas collection tube, and suck the soil air into the gas collection box. The disadvantage of this method is that the equipment is expensive and require...

AI Technical Summary

Problems solved by technology

The defect of this method is that due to the relatively large clay pipe head, it is difficult to take it out after being buried in the soil, especially when it is buried in the soil below 50cm. Often it can only be left in the soil after the test is over, so that it cannot be used repeatedly, resulting in The cost increases, and it also damages the soil. When collecting, it is necessary to equip an air suction pump or purchase an artificial foot-operated aspirator. The price is high, and energy consumption or artificial foot-operated sampling is required. sampling requirements

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