Marine sediment sampler

Abstract

The invention discloses a marine sediment sampler, which comprises a guide tail wing, a balancing assembly and a sampling tube with a sampling knife edge. The upper part of the balancing assembly is provided with an air storage chamber, an airflow passage is connected with the air storage chamber and an air vibrator, and an air outlet hole of the air vibrator is communicated with a vertical adjustor; and a valve control system controls a valve on the airflow passage. The upper part of the balancing assembly of the sampler is provided with the air storage chamber, the air vibrator and the vertical adjustor, the sampler has the sampling functions of two samplers of gravity and electric vibration; during vibration sampling, the inclination of the sampler is corrected by using the air discharged by the air vibrator through the vertical adjustor; and the sampler has a simple, compact and reliable structure, does not need a bracket or a chassis, and does not need a power supply cable. Once the sampler is fed, the sampler automatically finishes sampling in a mode of gravity or combination of gravity and vibration according to the property of the marine sediment, and greatly improves the sampling work efficiency.

Description

technical field [0001] The invention belongs to a sampling device in the field of measurement and testing, in particular to a seabed sediment sampler. Background technique [0002] At present, the columnar samplers used for underwater sediment sampling are mostly gravity piston samplers and vibrating piston samplers. In order to obtain well-preserved long rock cores, vibrating pistons are often used for hard bottom sediments such as iron plate sand and hard clay. sampler. The Chinese patent of notification number CN 2360587Y discloses a "long rock core gravity piston sampler" technology, which relies on the self-weight of the equipment and utilizes the momentum generated by the movable hanging and falling off to make the sampling pipe drill into the underwater sediment for sampling. Limited by the weight of the equipment, it is suitable for routine sediment sampling. The Chinese patent with the notification number CN 100334436C discloses the technology of "a single-pipe se...

AI Technical Summary

Problems solved by technology

In order to be able to replace the bulky chassis, the DDC-XZ-1 suspension vibrating piston sampler uses a separately set float ball suspended above the sampler to keep the vertical balance of the sampling tube underwater, although the chassis of the equipment is reduced so that The volume of the equipment is reduced, but keeping the sampling tube vertical is only an ideal state. In actual operation, under the action of water flow, it is difficult to achieve a vertical balance state; at the same time, the sampler must have a power supply cable connected to the vibrator. , it also needs to add a steel wire connected with the floating body ball, its design is complex and bulky, far less practical and convenient than the gravity piston sampler

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