Development Of Sampler Actuated By A Shape-Memory-Alloy Element For Hydrothermal Fluid From Underwater Volcano

The sampling of hydrothermal vents of the volcano in the deep sea is aprosperous technology, which is of utmost importance to the biomedicine technologyand the life science. A new sampler for the hot fluids from the volcano underwaterusing Shape Memory Alloy (SMA) is developed in this paper.Based on the analysis using the Finite Element Analysis software of ADINA,we decide on the scheme of the sampler that comprised of two reverse ball checkvalves, that can regulate corresponding to the condition to keep seal. The outside BallCheck valve is actuated by a shank made of Shape Memory Alloy. A Nitrogen springis included in the sampler to keep the pressure of the fluid container be the same as inthe sampling position. Thus, the sampling technology promoted here is one that freeof distortion in a sense.With a view to the working environment of the sampler, which is of highpressure and high temperature, we select the Titanium alloy to make the sampler, thatis of high strength and is high temperature enduring, and it is seawater erosionenduring as well. The process of manufacturing of the sampler is analyzed and someadvices are promoted in this essay.Lastly, some experiments are deployed on the showpiece of the sampler, and it isproved to be effective in the hydrothermal fluid sampling conditions.The special characteristics of the sampler are: Firstly, actuated by a SMA shank,the sampler is electric free, and it is environment protecting to some degree.Secondly, applying the Nitrogen spring, he pressure of the fluid sampled is keptin that of the position of the volcano underwater, which is benefit for the animalculein the fluid to survive the sampling, that is significant to the following research.