Handheld columnar sediment collector with mud cutting knife edge

Abstract

The invention discloses a handheld columnar sediment collector with a mud cutting knife edge. The handheld columnar sediment collector comprises a handle rod, a lifting cover, a sampling pipe and a cavity frame thereof, a sampling head, a locking part and a top mud sealing plug, wherein a spillway hole and a movable plug matched with the spillway hole are arranged on the lifting cover; the handle rod is in threaded connection with the lifting cover; the sampling pipe is arranged in the cavity frame of the sampling pipe; the lifting cover is connected with the cavity frame of the sampling pipe by the locking part; the sampling head is fixed at the bottom of the cavity frame of the sampling pipe; the top mud sealing plug is cylindrical; the outer wall of the top mud sealing plug is tightly attached to the inner wall of the sampling pipe; in a sampling state, the lifting cover and the cavity frame of the sampling pipe are relatively fixed by the locking part, and the spillway hole is communicated with the sampling pipe; in a state of taking out the sampling pipe, the lifting cover is separated from the cavity frame of the sampling pipe, and the bottom of the sampling pipe is closed by the top mud sealing plug; in a state of taking out or segmenting a sample, the bottom end of the sampling pipe is closed by the top mud sealing plug. The collector disclosed by the invention can be applied to collection of a hard mud layer and has the advantages of convenience in sample segmentation, simplicity and convenience in operation, high efficiency, convenience in carrying and accommodating, lightness, convenience and easiness in operation.

Description

technical field [0001] The invention relates to the field of underwater sediment collection devices, in particular to a sediment collector capable of meeting the requirements for collecting hard sediment columnar samples. Background technique [0002] Sediment is the reservoir and destination of water pollutants, and has extremely high scientific research value. Sediment collection is the primary process of sediment analysis, and the requirements for sample analysis are different, so the selected collection devices are also different. According to the working principle, sediment collection devices can be roughly divided into three categories: suction type, grabbing type and drilling type. Drilling type sediment collectors usually collect columnar samples, so they are also called columnar sediment collectors. Compared with the first two types, the columnar sediment collector will not disturb the natural layer of the sediment during the sampling process, and is the main means...

AI Technical Summary

Problems solved by technology

At present, the columnar sediment collectors suitable for shallow waters (generally less than 5 meters deep) usually directly use the sampling tube, that is, the lower edge of the plexiglass tube as the sampling knife edge. silted waters), the sampling tube with a certain wall thickness is difficult to insert or the insertion depth is small, it is difficult to complete the collection or the expected sample collection volume cannot be achieved

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