Design And Research Of Deep-Sea Planktonic Microorganism Concentration,Pressure And Heat Preservation Sampling Device

There are a large number of planktonic microorganisms in the deep-sea environment,which have important research value in the fields of industry,medical care,and life sciences.However,changes in pressure and temperature can lead to the death or deterioration of planktonic microorganisms,which seriously affects the authenticity of the data.Therefore,it is very important to develop a deep-sea planktonic microorganism concentration,pressure,and heat preservation sampling device.Based on the design of the traditional sampler,this paper adopts a modular design idea.According to the functions realized by each module,the sampling device is divided into seven modules,which are pressure holding module,filter module,heat preservation module,storage module,Control module,power module,transfer module.The overall design of the sampling device is carried out through Solidworks,and appropriate components such as accumulators,motors,and deep water pumps are selected,and the focus is on designing the basic structure of the sampling cylinder.During the sampling process,there will be problems such as uncontrollable sampling quantity,sudden change of pressure,sudden change of temperature,etc.Therefore,it is very important to design a new sampling cylinder.Aiming at the sudden change of pressure,the pressure compensation principle of the accumulator is used to maintain the pressure of the storage cavity inside the sampling cylinder.For the core component of the sampling device,the sampling cylinder,the dimensions of its key components are calculated and checked respectively.With the help of the ANSYS?Workbench static analysis module,the static simulation of the key components of the sampling cylinder is carried out to verify its strength and stability.At the same time,the excessive weight of the sampling cylinder will have a great impact on the sampling work.Therefore,the optimization analysis of the sampling outer cylinder is carried out,the sensitivity analysis of the sampling outer cylinder is carried out through the ANSYS?Workbench optimization module,and the response surface method is used to construct the relationship between the design parameters and the output results.The approximate function relationship of,improves its strength and stability under the premise of ensuring the lightest quality of the sampling outer cylinder.In order to achieve the purpose of thermal insulation,the design and research of the thermal insulation structure of the sampling cylinder are mainly carried out by filling the insulation material between the sampling outer cylinder and the sampling inner cylinder for thermal insulation treatment.Improve the overall thermal insulation effect.Compare and analyze different materials through the ANSYS?Workbench thermal analysis module,and select suitable insulation materials.In addition,due to the large amount of filling materials in the axial space,under the condition of meeting the temperature requirements,in order to achieve the lightest weight of the sampling cylinder,a For composite structural insulation materials,through comparison and analysis,the optimal thickness ratio scheme is selected.In order to increase the content of microorganisms,a four-stage filter membrane was designed in the plug cavity for concentration and filtration.At the same time,in order to characterize the deposition process of microorganisms on the filter membrane,the coupling method of CFD-DEM was used to study the effect of plankton concentration on the deposition process of plankton.The three-dimensional model of the ceramic membrane pores was established with reference to the suspended particle method,and the deposition process of planktonic microorganisms on the primary filter membrane was simulated under the conditions of fully considering the interaction between planktonic microorganisms and plankton microorganisms,and planktonic microorganisms and filter membranes.