Protective heat flow meter method thermal conductivity coefficient measuring instrument for realizing vacuum insulation and thickness measurement function

Abstract

The invention provides a protective heat flow meter method thermal conductivity coefficient measuring instrument for realizing the vacuum insulation and thickness measurement function. A test stack body of the measuring instrument comprises a hot plate and a cold plate, wherein a heating film is clamped between the hot plate and a hot plate fixed seat; and the cold plate is similar to the hot plate in structure. A vacuum system consists of a vacuum box, a vacuum pump, a sealing gasket and a sealing bottom plate; and the vacuum insulation function can be realized through the vacuum pump. A thickness measurement module consists of a displacement sensor capable of outputting an electric displacement signal; the displacement signal enters a controller and realizes the function of automatically measuring the thickness of a test piece; and the whole instrument is measured and controlled by a computer. The protective heat flow meter method thermal conductivity coefficient measuring instrument has the beneficial effects that the influence of environment on measurement stability is avoided through a vacuum chamber; meanwhile, the thickness of the test piece is automatically measured to avoid the personal error caused by manual measurement; and the measuring repeatability, the accuracy and the degree of automation of the instrument are improved. The protective heat flow meter method thermal conductivity coefficient measuring instrument can be widely applied to manufacturing enterprises of heat insulation and heat preservation materials, related quality inspection departments and units, institutes of higher learning, research institutes and other scientific research units.

Description

technical field [0001] The invention relates to a thermal conductivity measuring instrument, in particular to a protective heat flow meter method thermal conductivity measuring instrument capable of realizing the functions of vacuum insulation and thickness measurement. Background technique [0002] Thermal conductivity is an important parameter used to measure the thermal conductivity and thermal insulation performance of thermal insulation materials and thermal insulation materials. There are extremely important applications in aerospace and other fields. In order to better reduce energy consumption, save energy and reduce emissions, as well as optimize product design and improve product performance, the thermal physical parameter data of materials has high guiding significance, so the research on the method of determining the thermal conductivity of materials has very important practical significance. [0003] The measurement methods of thermal conductivity are mainly di...

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Problems solved by technology

[0004] At this stage, the leading thermal conductivity meters based on the heat flow meter method are mainly produced in foreign countries. Although there are related products in China, the technology is far from mature and the reliability is poor.

And the price of importing a protective heat flow meter method thermal conductivity tester is too expensive

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