Test device for performance testing of thermal insulation materials

Abstract

The invention discloses a testing device for detecting performance of a heat insulating material. The testing device comprises a mounting frame, an outer barrel fixed to mounting frame, an inner container arranged inside the outer barrel, a vacuumizing unit connected with the outer barrel, and a data acquisition unit, wherein the mounting frame is further equipped with a lifting and rotating mechanism for lifting and horizontally moving the inner container; the lifting and rotating mechanism comprises a lifting rod, a lifting driving mechanism and a swinging mechanism; a hoisting arm used for being connected with the inner container is arranged at the top of the lifting rod; the lifting driving mechanism is used for driving the lifting rod to lift up and down; the swinging mechanism drives the hoisting arm to rotate when the lifting rod is lifted to be in place. The testing device achieves automatic lifting and horizontal position adjustment of the inner container by using the lifting and rotating mechanism, so that human intervention is not required and the labor intensity is reduced; a coil heating mechanism is arranged on the outer wall of the outer barrel of the testing device, so that the temperature control precision is ensured; the testing device adopts an oil-free vacuum system combination of a molecular pump and a vortex dry pump, so that cleanness and oil freeness of a vacuum environment are thoroughly guaranteed.

Description

technical field [0001] The invention relates to low-temperature heat-insulation materials, in particular to a test device for performance detection of heat-insulation materials with vacuum. Background technique [0002] Vacuum multilayer insulation (Multilayer Insulation, MLI) was successfully developed by Peterson in Sweden for the first time in 1951. It is made of aluminum foil / aluminized film and a spacer material with low thermal conductivity, or a pleated single / double-sided aluminized film Composite, it is currently recognized in the world as a thermal insulation material with low thermal conductivity under high vacuum, and it is called "super thermal insulation". [0003] There are mainly the following indicators to measure the thermal insulation performance of thermal insulation materials: apparent thermal conductivity, specific heat flow and static evaporation rate. Apparent thermal conductivity refers to the heat transfer of the thermal insulation system through t...

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Problems solved by technology

But there are following problems in this testing device: (1) when needing to take out liner, after lifting mechanism completes rising action, need manpower to push liner to suitable dismounting position; When needing to install, also there is same problem; Cause labor intensity (2) The temperature of the outer wall of the inner tank cannot be accurately controlled, and the fluctuation is large, which has a great influence on the experimental results; (3) The original test device uses a combination of a molecular pump and a mechanical pump with oil, and there is unavoidable oil vapor pollution. Greatly affects the service life of the vacuum gauge

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