undisturbed soil fetcher

Abstract

An undisturbed soil fetcher is composed of an outer pipe joint, an oil seal, a bearing, a bearing end cover, an inner pipe joint, a lining pipe, an inner pipe, an outer pipe, an alloy cutting knife, a pipe shoe, a central shaft and a square hole; the outer outer The upper part of the pipe joint is processed with a square hole, which is used to connect with the driving drill pipe. The outer pipe joint and the outer pipe are connected by bolts, and the bottom port of the outer pipe is welded with several alloy cutting knives along the peripheral edge; the inner central axis passes through a pair of cones. The roller bearing is connected with the outer pipe joint, and the bottom end of the center shaft is connected with the inner pipe joint by thread; the upper and lower ends of the inner pipe are respectively connected with the inner pipe joint and the pipe shoe by bolts, and the pipe shoe exceeds the alloy cutting knife by 10~30mm; The liner is located on the inner side of the inner pipe, and its upper and lower ends are clamped and positioned by the inner pipe joint and the pipe shoe. The invention can keep the original state of the soil to the greatest extent, has a simple structure and is convenient for processing and manufacturing.

Description

technical field [0001] The invention belongs to the field of soil sample collection instruments. Background technique [0002] At present, there are few special soil fetchers for agricultural soil research sampling in China, especially in the sampling work involving undisturbed soil, most of the sampling tools are relatively simple. The commonly used sampling tool in soil science is the ring knife. Although it is easy to make, carry and use, the size of the undisturbed soil obtained is small, and the sampling efficiency is low. The undisturbed soil sample is also greatly affected by manual sampling experience. [0003] At present, most of the undisturbed soil fetchers used in soil science research are direct pressure type. For the soil with lush root system, the soil fetcher cannot cut off the root system during the working process, and the sampling will inevitably be disturbed by the movement of the root system. In addition, limited by the sampling diameter of the soil ext...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a large-diameter undisturbed soil sample collection device with a sampling diameter of 300mm and a sampling height of 500mm for the shortcomings of the existing undisturbed soil sampling diameter, which is small and the soil sample is easily affected by the root system. Cut off the crop root system to ensure the original state of the soil sample

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