Gravity columnar sediment sampler

Abstract

The invention relates to a gravity columnar sediment sampler. The gravity columnar sediment sampler comprises a sampling tube, a water drainage window is formed in the side wall at the top of a tubular part of the sampling tube, a sample tube and a clamping ring of the sample tube are arranged in the sampling tube, a limiting ring is arranged on the outer wall of the tubular part, a bearing seat and a lead load are arranged on the outer wall of the upper part of the water drainage window, a height gauge, a pressure sensor and a releaser are mounted below the bearing seat, a self-gravity waterdrainage window retainer ring connected with the releaser is arranged at the lower part of the bearing seat, the self-gravity water drainage window retainer ring descends under the action of the self-gravity and shields the water drainage window to prevent the overflowing phenomenon; a sealing cover, a submarine sound signal device and a lifting head are arranged at the top of the sampling tube, and a battery pack, a posture sensor, a singlechip and a data storage unit are arranged in the sealing cover. An upper propeller and a lower propeller which are perpendicular to each other are arrangedin the middle of the sampling tube. A one-way clamping tongue is also arranged on the outer side of the sampling tube and at the upper part of the water drainage window. The sampler penetrates into asediment on the seabed in a vertical posture, a columnar sediment sample on the seabed of the deep sea is efficiently acquired with high quality, and the sampling requirement on the columnar sedimentin the deep water area is met.

Description

technical field [0001] The present invention relates to a seabed sediment sampling device with known bottoming, controllable posture and roof fall prevention, more specifically, relates to a device that can vertically enter into seabed sediments and send a bottoming signal to a ship for receiving The gravity columnar sediment sampler of the device is used to obtain the columnar sediment samples of the deep sea bottom sediment, and is an important supplement to the sampling equipment for sea bottom sediment investigation. Background technique [0002] When conducting research on deep-sea marine sedimentary environment, seabed sediment acoustics, marine engineering geology, seabed geological hazard identification and evaluation, etc., only a certain number of undisturbed samples of seabed sediments can be directly obtained for sediment particle size, structure, composition, etc. The analysis and age determination, so as to obtain the corresponding geological information. Ther...

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Problems solved by technology

Due to the depth of the deep sea area and the length of the released cable, it is impossible to accurately judge whether the sampler has bottomed out by the tensiometer of the winch. It often happens that after the end of the sampling process, the length of the cable is not enough and the sampler does not touch the bottom. On the contrary, if the length of the cable is too large, it may cause a series of problems such as winding and knotting of the cable, and even lead to the scrapping of the cable. hit the bottom;

[0006] Another problem is that during the process of lowering the equipment, due to the effect of near-bottom ocean currents, the sampling tube of the gravity columnar sediment sampler often cannot enter the seabed sediments in a vertical posture, but is inserted obliquely into the sediments at a certain angle, resulting in The samples obtained cannot truly reflect the status of the sedimentary structure in the area; when encountering coarse-grained sediments, the sampler may even fall over and no sediment samples are obtained

[0007] Due to the time-consuming and expensive sampling of gravity columnar sediments in the deep ocean

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