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Device for testing low-temperature heat conduction rate of foam heat insulation material in loaded state

A technology of thermal insulation materials and testing devices, which is applied in the direction of material thermal development, etc., can solve the problems of low-temperature thermal conductivity testing of non-foam thermal insulation materials, etc., and achieve the effects of reducing test costs, eliminating heat loss, and simple structure

Inactive Publication Date: 2010-06-16
DALIAN FISHERIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no method and device for testing the low-temperature thermal conductivity of foam insulation materials in a loaded state.

Method used

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  • Device for testing low-temperature heat conduction rate of foam heat insulation material in loaded state
  • Device for testing low-temperature heat conduction rate of foam heat insulation material in loaded state
  • Device for testing low-temperature heat conduction rate of foam heat insulation material in loaded state

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Experimental program
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Embodiment Construction

[0019] The specific embodiments of the present invention will be described below in conjunction with the drawings. Such as figure 1 Shown: there is a sealed vacuum chamber 1, and the entire inner and outer surfaces of the vacuum chamber 1 can be polished to function as a heat radiation shield. The vacuum chamber is provided with a wire hole 11 and the vacuum chamber The vacuum tube 2 is communicated in the body 1, and a bellows 4 is welded to the cover (flange) 3 on the vacuum chamber 1. The bellows 4 is built with a heat-insulating pressure rod 5 made of glass fiber reinforced plastic and other heat-insulating materials. The upper end of the pressure rod 5 is connected with the bellows 4, and the lower end is inserted into the vacuum chamber 1 through the cover 3 and connected with the pressure plate 6. A cold chamber 7 is provided under the pressure plate 6, and the upper surface of the cold chamber 7 is a cold plate 8. The lower end of the cold chamber 7 communicates with th...

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Abstract

The invention discloses a device for testing the low-temperature heat conduction rate of a foam heat insulation material in a loaded state, which is simple in structure, low in cost, convenient in operation and accurate in test result, and is provided with a sealed vacuum cavity communicated with a vacuumizing pipe, wherein a sealing cover on the vacuum cavity is fixed with a corrugated pipe; a heat insulating pressure bar is arranged in the corrugated pipe; the upper end of the heat insulating pressure bar is connected with the corrugated pipe and the lower end of the heat insulating pressure bar passes through the sealing cover to enter the vacuum cavity to be connected with a pressing plate; a cold cavity is arranged below the pressing plate; a cold plate is arranged on the top of the cold cavity; the lower end of the cold cavity is communicated with a low-temperature liquid input pipe and the upper end of the cold cavity is communicated with an air exhaust pipe; the end of the airexhaust pipe comes out of the vacuum cavity; and a wire hole is formed on the vacuum cavity.

Description

Technical field: [0001] The invention relates to a testing device for low-temperature thermal conductivity of foam insulation materials, in particular to a testing device for low-temperature thermal conductivity of foam insulation materials in a loading state with simple structure, low cost, convenient operation and accurate test results. Background technique: [0002] Foam insulation materials have been widely used in low temperature fields, such as LNG transportation pipelines, LNG ships and other cryogenic liquid storage and transportation, etc., used in the aerospace industry cryogenic liquid propellant insulation layer and outer space cryogenic environment The insulation design and so on. The low-temperature thermal conductivity of foam insulation materials is an important thermophysical property index and an essential thermodynamic parameter for adiabatic calculation. [0003] The existing material thermal conductivity testing methods are roughly divided into two types, name...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20
Inventor 杨春光高兴张殿光段炼
Owner DALIAN FISHERIES UNIVERSITY
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