Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection

A multi-layer thermal insulation material, low temperature vacuum technology, applied in the direction of material thermal development, etc.

Active Publication Date: 2012-12-05
SHANGHAI JIAO TONG UNIV
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  • Abstract
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Problems solved by technology

Many current patents on thermal insulation test systems either measure the thermal insulation performance of thermal insulation materials in a hig

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  • Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection
  • Device for testing performance of low-temperature vacuum multilayer heat-insulation material based on thermal protection

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Embodiment Construction

[0020] The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

[0021] The present invention is realized through the following technical schemes, the present invention includes: a vacuum cover, an upper protection chamber, a test chamber, a lower protection chamber, a back pressure stabilization device, a controllable electric heating system, a temperature and flow sensing system, and liquid nitrogen filling System, data acquisition and processing system, vacuum pumping system, wherein: the upper and lower protective chambers are connected in space by using stainless steel pipes, and are connected to the blind end cover flange of the vacuum housing through thin-walled steel pipes. The test chamber is the main part to test the performance of multi-layer insulation, and the connecting pipe between...

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Abstract

The invention discloses a device for testing performance of a low-temperature vacuum multilayer heat-insulation material based on thermal protection. The device comprises a vacuum outer cover, a blind plate end cover flange, an upper protective cavity, a testing cavity, a lower protective cavity, a back pressure stabilizing device, a controllable electric heating system, a temperature and flow-rate sensing system, a liquid nitrogen filling system, a data collecting-processing system and a vacuum pumping system, wherein the upper protective cavity and the lower protective cavity are used for insulating heat leakage in the vertical direction and connected with the blind plate end cover flange of the vacuum outer cover through thin-wall steel tubes; the testing cavity is connected with the blind plate end cover flange through the same thin-wall steel tube structure as the protective cavities. An insulating material testing sample of the device can be replaced at will, the temperature distribution inside the insulating material and the evaporation rate of stored liquid under different thermal boundary temperature conditions can be measured, and the heat leakage percentage and the material apparent thermal conductivity can be further obtained by the evaporation rate.

Description

technical field [0001] The invention relates to a device for testing the performance of vacuum multilayer heat insulation materials, in particular to a performance test device for low temperature vacuum multilayer heat insulation materials based on thermal protection method. Background technique [0002] With the continuous development of industries such as aerospace, liquefied natural gas, metallurgy and chemical industry, the demand for cryogenic liquids is increasing, thus driving the demand for storage and transportation of cryogenic liquids. Vacuum multilayer insulation technology has been widely used in the field of cryogenic liquid storage due to its excellent performance. In addition, for the on-orbit storage scheme of low-Earth orbit propellant, the natural high vacuum environment of space can effectively eliminate the heat flow caused by gas heat conduction and convection, and the radiation shield in the multi-layer insulation can greatly reduce the radiation heat ...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 黄永华朱浩唯李骏
Owner SHANGHAI JIAO TONG UNIV
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