In-situ soil sampling resistivity measurement device

Abstract

The invention relates to the field of soil corrosivity detection and analysis, specifically an in-situ soil sampling resistivity measurement device. The device is suitable for the soil in-situ resistivity analysis in the petroleum field, the petrochemical field, the power field and the building field. The device comprises an upper cover, an insulating cylinder, measurement electrodes, and a lowercover. The specific structure of the device is that the upper and lower covers are arranged in a vertically opposite manner; the insulating cylinder is disposed between the upper and lower covers; theinner wall of the insulating cylinder is oppositely provided with the stainless steel measurement electrodes. In use, the top of the insulating cylinder is provided with an auxiliary sampling device,and the auxiliary sampling device comprises a lower press rod, a supporting rod and a press ring. The lower press rod and the press ring are connected with each other through the supporting rod, andthe auxiliary sampling device applies a pressure to the insulating cylinder through the press ring. The device provided by the invention can achieve the accurate measurement of the resistivity of a to-be-detected soil layer in a non-disturbed state, is used for the in-site soil sampling, and truly reflects the soil resistivity at a sampling position.

Description

technical field [0001] The invention relates to the field of soil corrosion detection and analysis, in particular to an in-situ soil sampling resistivity measurement device, which is suitable for soil in-situ resistivity analysis in the fields of petroleum, petrochemical, electric power, construction and the like. Background technique [0002] Soil is a mixture of solid, liquid, and gas three-phase substances. The solid skeleton composed of soil particles is filled with air, water and different salts. The presence of moisture and salts capable of conducting ion conduction in the soil makes the soil have the characteristics of an electrolyte solution, so metals can undergo electrochemical corrosion in the soil, and soil resistivity is an important factor for soil corrosion. [0003] The grounding resistance value is the key parameter and main technical indicator for the anti-corrosion design of buried facilities in the fields of petroleum and petrochemical, electric power, co...

AI Technical Summary

Problems solved by technology

The soil box measurement method is suitable for laboratory sampling measurement, which requires a large disturbance of the soil, and its measurement results are greatly affected by the sampling state and test time, and usually the measurement results have large errors

The soil stick measurement method usually has a small distance between electrodes, and the electrode area is also small, which is easily affected by stones in the soil, plant roots, etc., so the measurement results have poor reproducibility

[0012] At present, the soil resistivity test methods have great limitations, and are easily disturbed by factors such as soil inhomogeneity and soil disturbance, and cannot accurately measure the resistivity of the soil layer to be tested.

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