Sludge and sludge soil sample collecting and sampling device

Abstract

The invention discloses a sludge and sludge soil sample collecting and sampling device. The device comprises a sampling cylinder formed by fastening two semicircles; the lower end of the sampling cylinder is provided with a lower external thread to be connected with an annular sampler bottom edge or to be in threaded connection with the annular sampler bottom edge through a strain gauge mounting cylinder in threaded connection; the upper end of the sampling cylinder is provided with an upper external thread to be in threaded connection with a connecting cylinder; the upper end of the connecting cylinder is in threaded connection with an exhaust device internally provided with a piston rod and provided with an exhaust hole in a side wall; a coupling for connecting a driving device is arranged at the upper end of the exhaust device; a conical piston body at the lower end of the piston rod is located at an opening in the bottom of the exhaust device; and a matched conical surface is formed at the opening in the bottom of the exhaust device. According to the device, a commonly used small drilling machine can be used as a driving force, and sampling can be carried out in a relatively shallow sludge area by manual driving; and an original sampling mode is changed into a pure static pressure mode from a rotary static pressure mode, so that primary disturbance is reduced.

Description

technical field [0001] The invention relates to the technical field of surveying, in particular to a sampling device for collecting and sampling mud and muddy soil samples. Background technique [0002] In the field of engineering investigation and geotechnical engineering investigation technology, the most direct investigation technical method for high water content and high consistency soils such as silt and silt is to carry out various engineering physical and mechanical analyzes and tests after drilling and sampling. In order to better obtain undisturbed soil samples of silt and silty soil, it has become an important requirement in the fields of engineering and environmental protection. Traditional silt soil sampling is mainly carried out by means of drilling rig rotation to drive the sampler. This method has the following disadvantages: [0003] 1. Existing soil sample extractors are designed for non-silty soil samples. During the soil extraction process, a drilling ri...

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Problems solved by technology

[0003] 1. Existing soil sample extractors are designed for non-silty soil samples. During the soil extraction process, a drilling rig is used to drive the soil extractor to rotate and press down. This will greatly disturb the soil and easily damage the structure and original properties of the silt soil. It is not suitable for soft silt and silty soil to take the original sample

[0004] 2. Existing soil extractors need to use high-pressure water to push the soil samples out of the soil extractor after sampling. After the soil samples are ejected, sample selection, sample cutting and sample loading still need to be carried out, which will cause secondary disturbance to the silt soil

The sampling process is complicated, which is not conducive to field drilling operations

[0005] 3. The existing soil extractor has no visualization window and cannot observe the layered structure of water and silt soil

[0006] 4. The existing sampler is made of steel, with heavy weight, thick shell, fixed structure, single length, and heavy use, which cannot meet the diverse needs of silt light soil sampling

[0007] 5. The function of the existing soil extractor is single, and when the number of samples is large, it is necessary to purchase a large number of samplers, the cost of a single cycle is large, and the long-term use loss is high

[0008] 6. The existing sampler is a traditional sampler, which cannot obtain the corresponding physical and mechanical parameters and related mechanical curves during the sampling process. It does not have digital characteristics and cannot keep up with the needs of digital development.

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