| Because deep-sea organisms have lived in extreme environments for long time,their activity characteristics and physiological structures are very unique,so they are developed in genetic resources As well as life science research and other fields have great application prospects.In order to obtain active deep-sea organisms samples,it is necessary to control and maintain the in situ living environment of the samples in the sampler during the recovery process.At present,after years of research,the pressure packing capacity of the sampler has matured,and it can achieve packing sampling within the technical requirements,but the temperature is also It is a key factor affecting the biological activity of deep-sea macros.Therefore,thermal analysis of the sampler and reasonable insulation measures are one of the key technologies for obtaining in situ characteristics of deep-sea macro biology.In this paper,the insulation performance of the whole sea deep macro organisms sampler is used as the research object,and the insulation structure design is carried out.The specific research work is as follows:(1)The whole sea deep macro organisms sampler is analyzed,and its sampling process is elaborated,combined with the structure of the sampler,the heat transfer law of the sampler in the recovery process is analyzed,and a mathematical model of sample temperature and the ambient temperature in the recovery process is established;through the mathematical model,the factors affecting the sample temperature are obtained;finally,the size of the parts of the sampler is solved,and the minimum outer wall size of the sampler packing cylinder is obtained to be 132 mm.(2)Qualitative analysis of influencing factors using ANSYS Workbench software.First,a basic assumption is made about the temperature of the external environment;then the relevant parameters are set,such as the Element Size of the packing cylinder,the two end covers and the two flap valves are set to 0.008 m during the meshing process The element size of the sample is set to 0.005m;its analysis results show that the whole sea is deep due to the low temperature of the deep seabed The macro organisms recovery process is accompanied by a continuous increase in sample temperature,which is affected by factors such as the recovery operation,sampler material,and wall thickness.For the mounted all-sea deep macro organisms whose weight is strictly limited,in order to maintain the temperature stability of the macro biological activity environment of the sampler,it is necessary to adopt an efficient thermal insulation coating on the outer surface of the all-sea deep macro biological sampler,and take measures to speed up the sample transfer speed during the recovery operation and shorten its exposure to high temperature air.(3)According to the thermal insulation performance index of the all-sea deep macro organisms sampler,combined with its actual recovery environment,the size and material of the insulation layer structure can be determined.First of all,the existing insulation materials were investigated and screened,and three kinds of materials with good thermal insulation performance were selected;then,through experiments,the best thermal insulation performance of the three materials was determined as the material of the insulation layer structure;and then through the finite element analysis software,yes The thermal insulation experiment was analyzed by comparing the results of the simulation with the experimental data: the simulation can be better Reflecting the results of the experiment,and can be used as an analysis method for the design of the insulation result,the feasibility of the structural design of the insulation layer is verified from the perspective of simulation analysis;finally,the thickness of the insulation layer is determined to be 11 mm. |
