Research And Design Of Deep-sea Hydrothermal Fidelity Storage Device

Since1979the human firstly found the hot spring biological communities in thesea area of more than2000meters deep, the investigation of seafloor hydrothermal hasbecome one of the hotspots among major international research fields. At presentdomestic and foreign researchers have developed a series of hydrothermal samplingequipment, these sampling devices equipped with HOV or ROV (deep-sea cableremote control robot) or other equipment can enter into the submarine hydrothermalvents getting the sample, and bring back the heat fluid samples collected relying on thecarrying equipment. In the training and preservation of samples, domestic andinternational researchers have developed a series of indoor high temperature and highpressure reactor which realized the analysis and culture function of samples inlaboratory. But in the transfer between the sampler and sample observation equipment,the sample is directly transfer to the cultivation and observation equipment by thesampler to analysis at present.Because the thermal fluid sampling device have not themeasures of heat and pressure preservation for long time, it limits the effective storageof samples, and in this way, we cannot make many times and longer time intervalanalysis for a hot liquid sampling according to the need of subsequent analysisequipment. Aiming at these problems, we do research and design of the deep seahydrothermal sample temperature and pressure storage device system. The device canstorage the sampler samples with longer holding temperature and pressure, also canaccording to the need to sample time, partial transfer to hydrothermal training andanalysis equipment. In this paper, the main contents are as follows:(1) In this paper, through consulting massive literature material, I analyzed thesampling, training status and development trend of technology and equipment of hotliquid, and discussed their advantages and disadvantages. Based on the purpose andsignificance of this research, the research contents and technical route are established.(2) The overall design of deep-sea hydrothermal fluid storage device, establishedthe design scheme including structure system and control system. Through the analysisof the sample storage mechanism, established the storage technology scheme of anti-corrosion, insulation, packing and sealing method.(3) The storage tube, connector, energy storage cylinder, outer cylinder and otherparts are designed.On the basis of elastic failure criterion, cylinder size are calculated,then do the strength analysis and optimization design of the cylinder by Workbenchanalysis. At the same time, make the piston for transient analysis, analyses the stressand strain under the impact of sample moment, finally the supporting screw strength ischecked.(4) The design of the control system with PLC as the core are done, through theinstallation of temperature, pressure sensor at the storage cylinder end to monitor thestate of sample, display values, according to the feedback to realize the closed-loopcontrol.Finally according to the I/O distribution, control program are programed.(5) The storage device of sample transfer process dynamic characteristics areinvestigated. Through theoretical calculation and analysis, the orifice diameter d,length L and the relationship between the orifice sample transfer time are established.And with the hydraulic simulation software AMESim, the sample transfer process wassimulated, results show that the pore size larger effect the transfer time, the simulationresults and theoretical calculation results are consistent.