Underwater gas heat-preservation and pressure-preservation sampling device

Abstract

The invention relates to the technical field of underwater sampling devices, in particular to an underwater gas heat-preservation and pressure-preservation sampling device. The device comprises a gas collection mechanism, a sealing mechanism, a gas storage mechanism and a heat preservation mechanism. The sealing mechanism is arranged between the gas collecting mechanism and the gas storage mechanism, and the heat preservation mechanism is arranged on the outer wall of the gas storage mechanism and used for heat preservation of the gas storage mechanism. The heat preservation mechanism comprises a heat preservation cover body and a hydraulic gas tank assembly, the heat preservation cover body comprises a hydraulic gas channel arranged on the inner wall of the heat preservation cover body, and a gas inlet and a gas outlet are formed in the hydraulic gas channel. The hydraulic gas tank assembly comprises a hydraulic gas tank and a hydraulic gas pipe, and the hydraulic gas tank is communicated with the gas inlet through the hydraulic gas tank. The sealing mechanism comprises a sealing cabin body, a sealing plug block assembly and a high-pressure sealing assembly. The underwater gas heat preservation and pressure preservation sampling device is small in size, stable in packaging and heat preservation and suitable for small underwater remote control submersible vehicles such as an ARV.

Description

technical field [0001] The invention relates to the technical field of underwater sampling devices, in particular to an underwater gas heat preservation and pressure maintaining sampling device. Background technique [0002] ARV is a new type of underwater remote-controlled submersible. This type of submersible is similar to a remote-controlled underwater vehicle (ROV), but it is different from ROV in that it uses underwater self-contained power supply. [0003] The underwater gas heat preservation and pressure holding sampling device is mainly used for the hydrate sample collection of deep-sea cold spring vents. Due to the performance limitation of the manipulator equipped on the underwater submersible, it is impossible to complete the precise sealing and pressure holding work. Existing sampling devices mostly use a hydraulically driven multi-link structure for sealing and maintaining pressure, and use ice packs and insulation materials for heat preservation. The existing ...

AI Technical Summary

Problems solved by technology

The existing underwater gas heat preservation and pressure holding sampling device mainly has the following problems: ① Due to the matching gap and structural deformation of the connecting rod device during the underwater packaging process, it is easy to cause leakage of the packaged gas

② After the sample reaches the water surface, it is necessary to release the pressure and open the cabin to take out the sample, and then carry out a second pressurized packaging and transfer. This process will lead to changes in the internal structure of the sample and lose the value of research and analysis

③The existing device has a large overall volume and requires hydraulic drive, which is only suitable for large ROVs and cannot be adapted to small deep submersibles such as ARVs

④ The existing device uses ice packs and insulation materials to keep the samples warm, and the temperature of the samples is unstable during the submersible’s ascent process

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