A low-temperature performance test device and test method for a support heat insulation rod for low-temperature equipment

Abstract

The invention discloses a testing device for the cryogenic property of thermal-insulation support rods for cryogenic equipment. The testing device comprises a base, a vacuum container, an axial mounting assembly and a radial mounting assembly, wherein the axial mounting assembly is mainly used for providing axial tension; the radial mounting assembly is mainly used for providing a cryogenic environment; the axial mounting assembly comprises a first thermal-insulation support rod, a cold plate, a second thermal-insulation support rod, a loading pull rod and a loading device, and a one-way or three-way cryogenic strain gauge and a one-way or three-way normal-temperature strain gauge are arranged on the first thermal-insulation support rod and the second thermal-insulation support rod respectively; the radial mounting assembly comprises a thermal-insulation support seat located in the vacuum container, the cold plate, a cold bridge device and a refrigerator cold head, and a heating piece is arranged on the refrigerator cold head. The invention further discloses a testing method of the testing device. The testing device is ingenious and reliable in structure and meets the testing requirements for mechanical property and heat leakage of the thermal-insulation support rods for the cryogenic equipment, and a testing result of the testing device can provide technical support for overall design of the cryogenic equipment.

Description

technical field [0001] The invention belongs to the technical field of material performance testing, and in particular relates to a low-temperature performance testing device and a testing method for a supporting heat-insulating rod for low-temperature equipment, which is used for simulating and assessing the strength of a supporting heat-insulating rod for low-temperature equipment at low temperatures in a low-temperature vacuum environment and leak heat. Background technique [0002] For some equipment operating at deep low temperature, it is usually placed in a low-temperature environment with thermal insulation and vacuum, and it is connected with structural members at normal temperature by using support insulation rods. The supporting insulation rod is a key part of cryogenic equipment, which plays the role of heat insulation, bearing the weight of the equipment and bearing a certain load. Therefore, the requirements of strength and heat leakage should be taken into acc...

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Problems solved by technology

[0003] At present, the low-temperature performance test devices provided by domestic testing machine factories are generally transformed from universal testing machines, and can only test the strength in a liquid nitrogen environment (77K), and cannot test heat leakage

For some equipment used at a temperature of 30K, the test device obviously cannot meet the performance test requirements

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