Device for collecting bottom sediments and submarine water simultaneously

Abstract

The invention discloses a device for collecting bottom sediments and submarine water simultaneously. The device comprises a sampling tube, a piston, a balance weight, a water collecting box and a balance wing; a plastic sleeve is arranged in the sampling tube and used for storing bottom sediment samples; the piston arranged in the plastic sleeve is connected with a cable, and extends out of the top of the sampling tube, and is driven to move upwards by pulling the cable, so that the bottom sediment samples are pulled into the plastic sleeve; an automatic opening assembly is arranged at the bottom of the water collecting box and is opened under pressure of seawater when the device sinks in the sea and is inserted into the bottom sediments so that the submarine water is sampled into the water collecting box; the automatic opening assembly is closed when the sampling device floats so that the submarine water sample is sealed. The device has both functions of collecting bottom sediments and submarine water and can collect the submarine water sample at the position 1-2m away from the seabed.

Description

technical field [0001] The invention belongs to the technical field of seabed sampling devices, and in particular relates to a sampling device for collecting seabed sediments and ocean bottom water. Background technique [0002] At present, the devices used for seabed geological sampling generally include gravity samplers and box samplers, and columnar sampling is the main method. Among them, the gravity sampler is a common tool for sampling seabed rock cores. Its working principle is to generate gravitational potential energy at a predetermined height, release it with a release device and convert it into kinetic energy, and generate a huge impact on the seabed rock formation, and then make gravity The sampler is inserted into the seabed rock formation to sample the seabed core. [0003] This kind of gravity sampler has a single function and can only sample the seabed geology, and cannot simultaneously complete the sampling task of the bottom water of the ocean. It needs to...

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Problems solved by technology

[0003] This kind of gravity sampler has a single function and can only sample the seabed geology, and cannot simultaneously complete the sampling task of the bottom water of the ocean. It needs to use other special water collectors to perform water intake operations alone

However, for the deep sea environment, it takes a long time to perform a single sampling operation. For example, it usually takes 2.5 hours to collect a sample at a water depth of 1200 meters. If the seabed sediment sampling and ocean bottom water sampling are performed sequentially, the sampling time will be too long. ,low efficiency

Moreover, current water extractors are generally not suitable for deep-sea environments, and are easily affected by tidal currents with water depths exceeding 500 meters, and can only hover at a position 10m~15m above the seabed and dare not continue to lower them, so it is impossible to complete the 1m~1m above the seabed. The collection task of 2m ocean bottom water, the applicable field is very limited

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