Multilayer heat-insulating flexible cover with variable volume

Abstract

The invention discloses a multilayer heat-insulating flexible cover with a variable volume, which is used under a constant pressure condition. The multilayer heat-insulating flexible cover with the variable volume comprises multiple heat-insulating layers, one or more protective layers and one or more waterproof layers, wherein the heat-insulating layers are located in the middle of the flexible cover and used for decreasing heat conduction on two sides for the realization of a heat insulating effect; the protective layers are connected with the heat-insulating layers and used for protecting the heat-insulating layers from external environmental influences; the waterproof layers are located on the outermost side of the flexible cover and used for preventing the entrance of moisture into the internal structure of the flexible cover from the external environment; spacing layers are arranged between the multiple heat-insulating layers; and inert gas is filled between each two adjacent layers. The multilayer heat-insulating flexible cover with the variable volume can be designed into various shapes according to demands, combined into various-volume cavities, and mainly used for a heat-insulating structure of a constant pressure high / low temperature test system with the variable volume; meanwhile, the multilayer heat-insulating flexible cover with the variable volume is filled with argon; and therefore, the heat conduction amount of the multiple heat-insulating material layers is effectively decreased, the higher heat-insulating performance still can be maintained under the constant pressure and the usage range of the multiple heat-insulating material layers is expanded.

Description

technical field [0001] The invention relates to high and low temperature heat insulation technology, in particular to an atmospheric pressure flexible multi-layer heat insulation soft cover of a variable volume high and low temperature test box in the aerospace field. Background technique [0002] During the comprehensive high and low temperature test of the space docking mechanism on the ground, it is required that the volume of the high and low temperature test chamber can be changed with the movement of the docking mechanism. Volumetric high and low temperature flexible multi-layer insulation mechanism. [0003] In general, air containing moisture will remain in the multilayer insulation material. Under normal pressure, the change of residual gas in the multilayer insulation material will cause the change of the temperature distribution of the insulation layer, especially at low temperature, the interlayer air moisture content Condensation can seriously affect the ther...

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Problems solved by technology

But spacer materials with adsorbents increase solid thermal conductivity and reduce strength

[0005] Most of the above methods are carried out under high vacuum for multilayer insulation, but there are some disadvantages in high vacuum multilayer insulation materials: (1) It is difficult to achieve and maintain high vacuum between layers, which affects the insulation performance of the material ; (2) The general interlayer vacuum is mostly a rigid structure. Even if the flexible layer film material is pumped into a high vacuum, its flexibility will be greatly reduced, which affects the scope of use; In high-temperature applications, it is difficult to effectively balance the needs of high vacuum and flexibility

[0007] After searching the public literature of the prior art, it was found that the existing invention patents on multi-layer thermal insulation structures are mainly applied in vacuum state, the invention patent of multi-layer thermal insulation with application number 85106548 and the thermal insulation structure of cryogenic liquid container with application number 200620048082.8 The utility model patent is mainly used in cold and hot vacuum interlayers, especially suitable for thermal control of space vehicles, and does not mention the use effect and improvement method in the non-vacuum state of the ground

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