There may be the following reasons why a liquid argon dewar cannot be filled with liquid argon:
1.There may be cracks or tiny pores inside the liquid argon dewar, preventing the liquid argon from being charged. This can be due to prolonged use, aging of the material, or impact from external forces.
2.The filling port of a liquid argon dewar may be clogged or malfunctioning, preventing the liquid argon from being filled properly. This can be due to dust, impurities, or other substances getting into the inflatable port.
3.The liquid argon dewar can have an excessively high evaporation rate, resulting in a rapid reduction in the amount of liquid argon that cannot meet the filling demand. This can be due to high temperatures, insufficient purity of liquid argon, or poor sealing of storage containers.
4.The filling pressure of the liquid argon dewar may be insufficient or too high, resulting in the failure to properly fill the liquid argon. This can be due to a malfunctioning pressure regulator or inaccurate pressure control.
In view of the above reasons, we can take the following measures to solve the problem that the liquid argon dewar cannot be filled with liquid argon:
1.Inspect the liquid argon dewar for cracks or porosity and replace it with a new one if necessary. At the same time, care should be taken to avoid external force impact and overload use to prolong the service life of the liquid argon dewar.
2.Check whether the inflation port of the liquid argon dewar is unblocked, and clean it up in time if it is blocked. Keep the inflator clean and dry to prevent dust, impurities, and other substances from entering the inflator port.
3.Reduce the evaporation rate of liquid argon by lowering the storage temperature of liquid argon, improving the purity of liquid argon, or replacing storage containers with better sealing performance. At the same time, pay attention to the environment in which liquid argon is stored and used to maintain its quality and quantity.
4.Inspect the pressure regulator and pressure control of the liquid argon dewar to make sure it is working properly. In case of failure, repair or replace relevant parts in time. At the same time, pay attention to adjust the filling pressure according to the actual demand to avoid too high or too low a situation.
In short, the liquid argon dewar tank can not be filled with liquid argon may involve many problems, which need to be comprehensively considered and taken corresponding measures to solve. Paying attention to maintenance and upkeep during use can extend the service life of the liquid argon dewar tank and improve its use effect. At the same time, for the liquid argon dewar tank that has problems, timely measures should be taken to repair or replace it to ensure its normal use and safety performance.