Portable sampling device for deep in situ soil and usage method thereof

Abstract

The present invention relates to a portable sampling device for deep in situ soil. The device comprises a hamming handle, a threaded joint, a connecting rod and a sampling head which are connected successively from top to bottom. The threads of one end of the connecting rod are connected to the threaded joint, and the threads of the other end of the connecting rod are connected to the sampling head; the connecting rods and the sampling head are sleeved with a straightness limiting device; the straightness limiting device comprises a cylindrical sleeve; a horizontal plate is arranged at the periphery of the bottom of the cylindrical sleeve; the cylindrical sleeve is perpendicular to the horizontal plate; the bottom port of the cylindrical sleeve is provided with an annular fending platform; a perforation is arranged at the center of the annular fending platform; and the sampling head and the connecting rod penetrate through the cylindrical sleeve and the perforation. The portable sampling device of the invention can perform stratified sampling and deep soil sampling; the straightness limiting device ensures the sampling head and the connecting rod vertically enter into the soil to prevent the sampling head and the connecting rod from inclining and remolding other soil layer when entering into the soil, thus no destruction to the original soil layers; the portable sampling device is dismountable and easy to carry, greatly improving the efficiency of soil sample collection.

Description

technical field [0001] The invention relates to a portable deep in-situ soil sampling device, which belongs to the technical field of soil sampling equipment. Background technique [0002] my country is a large agricultural country with only 7% of the world's arable land, but it needs to feed 22% of the world's population. In order to obtain high yields to meet the growing population needs, my country's production and use of chemical fertilizers currently rank first in the world. In 2008, the national fertilizer application The consumption is 52.39 million tons, with an average of 430.4kg / hm 2 , far exceeding the 225kg / hm set by developed countries to prevent water pollution from chemical fertilizers 2 The upper limit of the safety limit, the average utilization rate of chemical fertilizers is only about 40%. The application of a large amount of chemical fertilizers brings about the problem of excessive fertilizer pollution: on the one hand, high-volume fertilizer input can...

AI Technical Summary

Problems solved by technology

The application of a large amount of chemical fertilizers brings about the problem of excessive fertilizer pollution: on the one hand, high-volume fertilizer input can easily lead to the enrichment of soil nutrients, resulting in eutrophication of the soil; on the other hand, a large amount of lost chemical fertilizers enter the groundwater and Surface water, exacerbating the eutrophication of water bodies

But this soil layer scraping sampler has the following defects in use: (1), when in use, the horizontal frame is driven into the ground first, then scrape the soil back and forth along the horizontal frame with a scraper, and use a small shovel, etc. at any time The tool collects the scraped soil samples. When the scraping reaches the preset single-layer sample sampling depth, it slides back and forth to scrape the soil until all the soil samples at the set depth are scraped. This device requires repeated scraping by manpower. The soil layer is time-consuming, laborious, slow, and inefficient. Due to the long-term accumulation of fertilization, the accumulation of nutrients in the soil has gradually moved down. This device is only suitable for collecting samples of the soft soil layer. Layer samples cannot be collected

(2) Larger soil pits will be left on the surface after sampling, which will seriously damage the surface topography

However, the disadvantage of this patent is that when the soil is taken from deep layers and the soil quality is hard, when hammering is used as the power, the power directly acts on the drill bit and drill pipe of the collection drill, and the drill bit and drill pipe are easily damaged, and the drill pipe is longer , it is easy to tilt when entering the soil layer, resulting in inaccurate sampling of the soil layer during sampling, and the soil sample is easily polluted

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