sediment layer sampler

Abstract

Sediment layered sampler, including a semicircular sampling tube, a plurality of horizontal partitions are arranged at equal intervals inside, a knife edge is provided on one side edge, a drill bit is provided at the bottom, and a conical cap is provided at the top; the upper surface of the drill bit and the lower surface of the conical cap There is a round hole in the middle of each hole, and a rotatable wing plate is installed between the two holes; one side edge of the wing plate is connected with a wing plate, and the other side edge is equally spaced with a plurality of narrow slits. The number of slits is equal to the number of partitions, and each partition is located in the corresponding narrow slit; the top of the cone cap is connected with the connecting rod. When the invention is used for sampling, the sediment around the sampler will not be compacted longitudinally during the drilling process, which can ensure that the weak sediment interlayer enters the sampling tube, will not cause the loss of key sediment layers, and significantly improve the sediment quality. The high coring rate ensures that sediment samples from different layers will not be mixed during equipment operation and sample transportation, providing reliable samples for sedimentology research.

Description

technical field [0001] The present invention relates to the technical field of fidelity sampling of sediments, and more specifically relates to a device for accurately layered sampling of sediments, which ensures that the sedimentary sequence of high water content or loose sediments is not damaged during the sampling process. Background technique [0002] In the process of scientific research, it is often necessary to obtain sediment samples from sediments such as estuaries, coasts, beaches, wetlands, loess, etc. Research in certain directions has high requirements for sampling, and it is required that no sediment occurs during the sediment sampling process. Compression, lack of sedimentary layers, and changes in sedimentary sequences. Because sediments in these areas are prone to creep, liquefaction, and disturbance, fidelity sampling techniques and methods for sediments have always been an urgent problem to be solved in sedimentology research. [0003] The Chinese patent w...

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Problems solved by technology

[0003] The Chinese patent with the notification number CN 109596381A discloses "a soil core layered collector that maintains the in-situ characteristics of the sediment". The sediment directly enters the sample chamber in the sampler from the bottom of the sampler, which can meet the needs of scientific research activities There is a need for anaerobic, light-shielding, and stratification of sediments, but in practical applications, there are a series of problems in maintaining the in-situ characteristics of sediments, stratification, and compression in the sampler that acquires sediments from the bottom: for example, in The process of sediment entering the sampler will inevitably cause sediment compression. If there is a weak interlayer in the sediment, the interlayer may not enter the sampler, resulting in the lack of sediment sequence. In practical applications, the interlayer entering from the bottom The sampling rate of the sampler is basically below 70%, that is to say, for every 1 meter that the sampler enters into the sediment, the height of the sediment obtained in the sampler is basically below 0.7 meter, which is mainly due to the deposition during the drilling process. The compression of the material, the failure of one or more layers of sediment to enter the sampler, etc.

[0004] Notification number is that the Chinese patent of CN206479350U discloses a kind of device of " peat soil sampling drill bit and peat soil sampler ", can effectively solve the problems such as sediment compression and weak deposit layer missing that occur in the process of sediment entering the sampler, but carry out When fidelity sampling of high water content or loose sediment, the shaking of the sampler will damage the sequence and structure of the sediment in the sampler

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