Underwater injection type sediment in situ culture device

Abstract

The invention relates to an underwater injection-type sediment in-situ culture device. A basic principle of the underwater injection-type sediment in-situ culture device is that culture liquid is injected in advance into an injector in the culture device; a submersible vehicle carries the culture device to a deep seabed, a manipulator holds a T-shaped handle to firstly inert the culture device into sediment and then pull a knot at an upper end of a cable to pull out a cotter, an arc-shaped baffle rotates around a bolt and slides away under the effect of spring force, a lower baffle presses a push rod of the injector under the effect of the spring force, and the push rod moves downwards to inject the culture liquid into sediment at different depths in a culture cylinder to carry out in-situ culture. The underwater injection-type sediment in-situ culture device can simultaneously realize in-situ culture of 1 to 10 types of culture liquid at 1 to 10 culture depths in deep seabed sediment. The culture device can cooperatively perform operation with an ROV (Remotely Operated Vehicle) and an HOV (Human Operated Vehicle), the principle is reliable, the structure is simple, the operation is facilitated, and the culture device is suitable for in-situ culture of sediment on the deep seabed.

Description

technical field [0001] The invention belongs to the technical field of marine exploration, and in particular relates to an underwater injection type sediment in-situ culture device, which realizes in-situ sediment in-situ cultivation by injecting various culture solutions such as isotope tracers into sediments at different depths on the deep seabed Culture and sample collection. Background technique [0002] The study of deep-sea biogeochemical processes is of great significance for understanding the carbon, nitrogen and sulfur cycle. Most of the research on traditional biogeochemical processes is to collect sediments on the seabed, then transport them to the ship, and add various culture solutions such as isotope tracers to the collected sediment samples in the ship laboratory or land laboratory for cultivation, and finally Analytical testing of culture products reveals the rates and mechanisms of microbe-mediated biogeochemical reactions. However, in extreme seabed envir...

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Problems solved by technology

These high-concentration gases contained in the sediment will exchange and escape due to changes in temperature and pressure during the long process of sediment samples being collected from the seabed and then transported to the deck, resulting in such gases in the sediment samples collected on the deck. The content of the content is significantly reduced, resulting in significant deviations in the results of laboratory culture experiments

[0003] At present, the short columnar sediment sampler that can be used with submersibles can only collect sediment samples on the seabed by manipulators, and cannot carry isotope tracers and other culture fluids to carry out in situ culture experiments in seabed sediments.

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