Device for providing low-temperature environment

Abstract

The invention discloses a device for providing a low-temperature environment, comprising a liquid nitrogen storing component, a liquid nitrogen delivery pipe and a liquid nitrogen insulating component, wherein a liquid nitrogen output end of the liquid nitrogen storing component is connected with a liquid nitrogen filling opening of the liquid nitrogen insulating component through the liquid nitrogen delivery pipe. The device for providing a low-temperature environment can overcome the defects of weak pressure-bearing capacity, poor insulation effect, deformation and the like in the prior art, thereby realizing the advantages of strong pressure-bearing capacity, good insulation effect and no deformation.

Description

technical field [0001] The invention relates to an experimental device for giant magnetostrictive materials, in particular to a low-temperature environment providing device. Background technique [0002] At present, in a large number of experimental studies, researchers have found that the magnetomechanical coupling performance of giant magnetostrictive materials is affected by changes in external loads and ambient temperature, especially in low temperature environments (the temperature of liquid nitrogen is -196°C). The giant magnetostrictive material has a much larger magnetostriction than that at normal temperature (the ambient temperature is 20°C). The magnetostriction of giant magnetostrictive materials can reach 6000ppm at low temperature, and the maximum magnetostriction of giant magnetostrictive materials at room temperature is 2200ppm (ppm=10 -6 ). [0003] In the prior art, when the above-mentioned giant magnetostrictive material is tested at low temperature, i...

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Problems solved by technology

[0005] The existing pressure-bearing Dewar vessel is an ordinary Dewar vessel, and the vacuum double-layer structure cannot withstand very large pressure

If the ordinary Dewar container is pressurized and exceeds the pressure, it will deform the ordinary Dewar container and lose the function of heat preservation. The serious ordinary Dewar container will be directly damaged.

[0006] To sum up, in the process of realizing the present invention, the inventors found that at least there are defects such as weak pressure bearing capacity, poor heat preservation effect and easy deformation in the prior art

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