Double-layered cylinder wall soil pillar soil sampler

Abstract

The invention discloses a double-layered cylinder wall soil pillar soil sampler, which includes an outer cylinder and an inner cylinder that are mutually nested and spliced, wherein spirally arranged guiding ribs are arranged at the bottom on the outer wall of the outer cylinder; axial positioning parts mutually matched are arranged at the top parts of the outer cylinder and the inner cylinder; the inner cylinder is provided with an extending part extending out of the top end of the outer cylinder; and an inner cylinder handle is fixed on the extending part. The soil sampler has a simple structure, and is convenient to use, the inner cylinder and the outer cylinder are jointly rotated and drilled underground, the inner cylinder is drawn out to obtain the soil pillar of a soil sampler, and then the outer cylinder is screwed out in the reverse direction; the splicing fit of the inner cylinder and the outer cylinder reduces the resistance when the soil sampler is inserted in and drawn out, so as to reduce the dissipation of the soil sampler and prolong the service life of the soil sampler, and a soil pillar sample at a specific depth in the soil can be accurately obtained as per calibrations of the inner cylinder and the outer cylinder.

Description

technical field [0001] The invention relates to a soil fetching tool, in particular to a soil fetching device for a double-layer cylinder wall soil column which is easy to obtain deep soil profile samples. Background technique [0002] Soil sampling analysis is the basic content of environmental, ecological, agricultural and other research. Accurate, appropriate, and rapid acquisition of soil samples at different depths of soil is directly related to the accuracy of the research and the reliability of the data. [0003] Soil samplers come in many varieties. A small shovel can be used to collect surface soil samples from farmland or wasteland. To study the general physical properties of soil, such as soil bulk density, porosity and water holding properties, etc., ring cutters can be used. The ring knife is a cylinder with openings at both ends and a blade at the bottom. The height and diameter of the cylinder are about 5 cm. But the most commonly used sampling tool at pre...

AI Technical Summary

Problems solved by technology

Due to the relatively large contact area of ​​the existing soil extractor with the soil surface, the insertion resistance will also increase with the increase of the sampling depth, resulting in the difficulty of inserting and removing the soil extractor in the soil, time-consuming and laborious, and due to the increase of resistance It is easy to cause problems such as damage to the soil fetcher, which greatly limits the depth of one-time sampling of the soil soil column

The method of collecting soil samples at different depths multiple times is not only time-consuming and laborious, but also causes significant sampling errors.

[0005] A traditional soil extractor consists of a tubular drill bit connected to a drill pipe and a handle fixed to the upper end of the drill pipe. When collecting soil samples, hold the handle and rotate vigorously to lock the soil in the pipe of the drill bit, and then use a thin stick to squeeze the required Soil scraping, this method of collecting soil is time-consuming and laborious, which seriously affects the work efficiency of soil collection

[0006] The Chinese patent application number 201010026667.6 discloses a device for collecting surface soil samples, including a soil auger, wherein the auger is composed of a handle and a drill rod, the handle is arranged on the upper part of the drill rod, and the lower part of the drill rod It is provided with threads, and also includes a glue stick. A through hole is opened in the drill rod of the soil-borrowing drill. The through hole cooperates with the glue stick to meet the needs of collecting soil at different depths, but it still cannot solve the problem of increasing the sampling depth. Insertion resistance also increases

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