Sediment stratified sampler

Abstract

A sediment stratified sampler comprises a semicircular sampling pipe, a plurality of horizontal partition plates are arranged in the semicircular sampling pipe at equal intervals, a knife edge is arranged on the edge of one side of the semicircular sampling pipe, a drill bit is arranged at the bottom of the semicircular sampling pipe, and a conical cap is arranged at the top of the semicircular sampling pipe; the middle of the upper surface of the drill bit and the middle of the lower surface of the conical cap are each provided with a round hole, and a rotatable wing plate is installed between the two round holes. A wing plate is connected to the edge of one side of the wing plate, a plurality of narrow slits are formed in the edge of the other side of the wing plate at equal intervals, the number of the narrow slits is equal to that of the partition plates, and each partition plate is located in the corresponding narrow slit; and the top of the conical cap is connected with the connecting rod. When the sediment stratified sampler is used for sampling, in the drilling process, the longitudinal compaction effect cannot be generated on sediments around the sampler, so that a soft sediment interlayer can enter the sampling pipe, loss of a key sediment layer is avoided, the coring rate of sediments is remarkably increased, sediment samples at different layers are prevented from being mixed in the equipment operation and sample transportation process, and reliable samples are provided 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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