Convenient undisturbed soil taking device

Abstract

The invention discloses a convenient undisturbed soil taking device and relates to the technical field of soil taking tools. The undisturbed soil taking device comprises a base, a drilling pipe, a sampling pipe and a sample releasing device; the base is fixedly mounted on the ground to be sampled; the drilling pipe is clamped into the base, the top of the drilling pipe is provided with a handle for driving the drilling pipe to rotate, and the bottom of the drilling pipe is provided with sampling cutting edges which are vertically and spirally distributed; the sampling pipe is sleeved with the drilling pipe, and the sampling pipe can slide up and down along the inner wall of the drilling pipe; the sample releasing device comprises a sample releasing piston arranged at the top of the sampling pipe, and the sample releasing piston is provided with a sampling handle exposed out of the handle. The base plays a role of fixation, verticality of sampling is guaranteed, and labor intensity is lowered; a rotary-cut sampling mode is adopted, in the sampling process, soil is not or slightly disturbed, and the undisturbed feature of taken soil is guaranteed; by means of sample releasing design, secondary squeezing of taken soil by the sample releasing piston in a traditional sample releasing process is avoided.

Description

technical field [0001] The invention relates to the technical field of soil fetching tools, in particular to a convenient undisturbed soil fetching device. Background technique [0002] Soil is one of the high-yield, high-quality, and efficient resources for agricultural production. The undisturbed soil simulation experiment is an important means to study soil nutrients, trace elements, and water-salt migration characteristics in the field of agriculture and ecology. Physical properties such as soil bulk density and porosity All measurements need to be carried out on undisturbed soil columns, and the collection of undisturbed soil columns directly affects the accuracy and scientific nature of such research work. [0003] At present, the collection methods of the undisturbed soil column mainly fall into two categories: profile sampling and soil drilling. The section soil collection is to collect the undisturbed soil column in the field by using the natural or original terrai...

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Problems solved by technology

The section soil collection is to collect the undisturbed soil column in the field by using the natural or original terrain drop, or manually excavating the profile pit. Although this method can obtain a relatively high-quality undisturbed soil column, it is labor-intensive, time-consuming, and inefficient. Low, only suitable for large specimen collection and teaching demonstration

[0004] In the current research, all kinds of undisturbed soil samplers are commonly used, including electric or manual methods, but the electric soil fetching device has not been widely promoted because of the limitation of field power, complexity, and expense; manual soil fetching tools mainly include There are two methods: direct pressure type and rotary type. The direct pressure type enters the soil by hammering or auxiliary external force. This process is easy to disturb the edge of the soil sample due to artificial force such as hammering or pressure; rotary sampling equipment The soil column can be cut by rotation, and the soil column is directly sent into the sampling container, which can reduce the disturbance to the soil compared with the direct pressure type

For example, the prior art discloses a rotary undisturbed soil collection device. Although the device can reduce the disturbance of the soil during the sampling process to a certain extent, it lacks a fixing device, and it is easy to be uneven due to artificial force during use, and Factors such as topography and geology cannot guarantee the verticality of the soil samples taken; in addition, when the soil is taken from the sampling tube after the collection is completed, the movable rod is pushed to push the soil out. Relatively soft soil will cause damage to the original structure of the soil

[0005] In summary, the existing undisturbed soil sampling device has the disadvantages of inconvenient soil sampling or difficulty in ensuring the undisturbed structure of the soil. An improved equipment is urgently needed for sampling, which can make up for the shortcomings of traditional soil sampling devices and provide convenience for undisturbed soil sampling.

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