Ultra-silent liquid helium thermostat

Abstract

The invention discloses an extra-static liquid helium thermostat and relates to a liquid helium thermostat. The thermostat comprises a shell, an inner container, a bottle neck, a gas exhaust and inflation pipe, a helium outlet pipe and a cold shield, wherein, the inner container is arranged inside the shell; one end of the bottle neck extends to the bottom of the inner container from the top of the inner container and is sealed and connected with the bottom of the inner container; the other end of the bottle neck is communicated with the outer part of the shell by the top of the shell; the inside of the bottle neck is communicated with the outer part of the shell by the gas exhaust and inflation pipe; the cold shield is arranged between the inner container and the shell and covers the inner container; the helium outlet pipe is wound around the cold shield; the two ends of the helium outlet pipe communicate the inside of the inner container with the outside of the shell; vacuum is formed between the outside of the inner container and the inner surface of the shell; an auxiliary helium outlet pipe can be added and wound on the bottle neck; the two ends of the auxiliary helium outlet pipe can communicate the inside of the inner container with the outside of the shell; and the bottle neck can be made of a corrugated pipe. The bottle neck extends to the bottom from the top of the inner container and is sealed and connected with the bottom, so as to obtain a lower temperature cavity body separated from the liquid helium, and avoid the shock caused by the collision of the boiling of the liquid helium with the experimental facilities in the bottle neck. Two helium outlet pipes are utilized to cool the cold shield and the bottle neck, so as to reduce helium evaporativity.

Description

technical field

[0001] The invention relates to a liquid helium thermostat, in particular to an ultra-static liquid helium thermostat for scientific research with ultra-low vibration, and belongs to the technical field of cryostats. Background technique

[0002] The liquid helium thermostat for scientific research is a low-temperature container that can provide a low-temperature cold environment for the experimental device and shield the influence of external temperature, air and water vapor on the experiment. It has been widely used in thermophysical properties, material mechanical properties, Research and testing fields such as magnetic mechanical properties, material superconducting properties, optical physical properties and biomedicine development.

[0003] The existing liquid helium thermostats for scientific research have the following disadvantages: (1) The experimental device is directly immersed in the liquid helium in the inner tank when used, and the boiling of t...

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