Soil sample collection device

Abstract

The invention discloses a soil sample collection device which comprises a drill rod and a sampling tube, wherein a drill handle is arranged at the upper end of the drill rod; a drill bit is arranged at the lower end of the drill rod; a drill surface of the drill bit is a helical surface; a concentric positioning device is arranged in the drill rod; the sampling tube is rotatably arranged at the lower end of the concentric positioning device; and the upper end of the concentric positioning device is detachably connected with the drill handle. Compared with the prior art, in the soil sample collection device disclosed by the invention, a detachable sampling tube is arranged in the drill rod, and a drill bit with a helical surface is arranged at the lower end of the drill rod; when in sampling, external soil can be discharged out of the outer part of the drill rod through the helical drill surface, and the drill rod and the sampling tube are separated so that the sampling tube is always kept in a soil sampling hole; to continue drilling, the drill rod is connected with the sampling tube; thus continuous sampling is realized in the case of discontinuous drilling, and the sampling tube is always kept in the hole; and moreover, the soil sample collected in the sampling tube is always the original one, and the volume weight and water content of the soil can be accurately measured.

Description

technical field [0001] The invention relates to a soil sample collecting instrument, which belongs to the technical field of soil measurement. Background technique [0002] At present, the electronic instrument observation method and the soil auger observation method are used in agricultural meteorological operations to observe soil moisture, and the electronic instrument observation needs to be calibrated by the soil auger method. Obviously, the quality of the calibration is directly related to the observation results of the electronic instrument, and the quality of the calibration depends on the accuracy of the soil drilling method itself. The soil drilling method can only obtain the weight water content. If the volume water content is to be measured, the soil bulk density must also be measured. The measurement of soil bulk density in our country has always been a heavy task, such as the layered soil ring sampling method, which has a large workload, time-consuming and lab...

AI Technical Summary

Problems solved by technology

This method has the disadvantages that the collected soil will inevitably be squeezed during hard sampling, and the head and tail are cut off, the effective sampling height is limited, and the sampling depth is discrete.

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