Research on the thermal insulation properties of fire proof sleeve for cable based on aerogel
The thermal insulation properties of aerogel cable fire proof sleeve was studied,and the finite element software was used to numerically analyze the aerogel sling fire proof sleeve model.The commonly used PES 7-121 parallel steel wire cable was selected as the research object,and the change rule of five different thicknesses of fire-proof sheath on the inner temperature of the sheath in the HCinc model curve of the oil tanker fire for 60 min was studied.The results show that with the continuous increase of the duration of fire action,the temperature rise curve of the fire sleeve is basically linear.The thickness of the aerogel fire sleeve has a great influence on the heat insulation effect of the cable.When the thickness of the sleeve is greater than or equal to 12 mm,the heat insulation effect of the sleeve is not obvious.When the fire lasts for 60 min,the inner temperature of the sleeve is 133.7 ℃,and the heat insulation efficiency is 87.85％,which is greater than the temperature protection target of 300 ℃,the insulation efficiency is 72.42％,the fire and insulation requirements are met.
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