Water bottom sludge sampling device driven by two positioning slide blocks

Abstract

The invention relates to a water bottom sludge sampling device driven by two positioning slide blocks. The water bottom sludge sampling device comprises a power mechanism, a left and right side surface positioning mechanism, a bottom positioning mechanism and a scraper pan mechanism, wherein the power mechanism and the bottom positioning mechanism are respectively mounted on at the upper part andlower part of the left and right side surface positioning mechanism, slide blocks are positioned by guide slots to vertically move in the left and right side surface positioning mechanism, shear forksare controlled by a lead screw and springs between two ends of the shear forks, and the bottom of the device is positioned by the bottom positioning mechanism. According to the device, the positionedlead screw is moved up and down by virtue of a spring force and a tensile force of a digging rope to drive the two shear forks to move so as to open or close a scraper pan, thereby finishing the sampling of water bottom sludge; the manual operation is replaced with a mechanical method, so that the amount of labor is reduced, and the interference of water flow in the water bottom can be avoided; and by arranging the springs in the shear forks, the scraper pan can be automatically opened during sinking and can be closed by overcoming an elastic force when being pulled upwards, so that the operation is simple, and the structure is elaborate.

Description

technical field [0001] The invention relates to a sampling device, in particular to a bottom mud sampling device driven by double positioning sliders, which is used for sampling in environmental change research and environmental pollution detection of shallow water areas such as lakes or reservoirs. Background technique [0002] At present, the samplers for obtaining shallow muddy sediments in lakes, reservoirs and other waters include sampling tools such as grab type, box type, gravity type, piston type and freezing type. The samples obtained by the grab type and box type samplers are easily disturbed. The sampling tools such as gravity type, piston type and freezing type are affected by the water flow during sampling, the work is not stable, the sealing effect is not good, and the sample is lifted. During the process, it is easy to drop, and the sampling device cannot be fixed on the mud layer. Existing sampling devices cannot well meet the requirements of obtaining silty...

AI Technical Summary

Problems solved by technology

The samples obtained by the grab type and box type samplers are easily disturbed. The sampling tools such as gravity type, piston type and freezing type are affected by the water flow during sampling, the work is not stable, the sealing effect is not good, and the sample is lifted. It is easy to drop during the process, and the sampling device cannot be fixed on the mud layer, etc.

Existing sampling devices cannot well meet the requirements of obtaining silty undisturbed sediments in lakes and reservoirs. Therefore, it is necessary to develop a simple structure, practical and efficient, simple and fast assembly and operation, and a high sampling success rate. The sample obtained contains interfacial water, the original structure remains intact, no disturbance, and a high-quality bottom mud sampling device

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