The design process and the construction of a device that simplifies the procedure of obtaining low vacuum between the walls of the cryogenic vessels allowing a safe sealing and a substantial improvement of the thermal insulation

摘要

"The process of design and construction of a device that simplifies the procedure of obtaining low vacuum between the walls of the cryogenic vessels allowing a safe sealing and a substantial improvement of the thermal insulation.The present invention relates to a device which simplifies the procedure of obtaining partial vacuum between the walls of the cryogenic vessels allowing a safe sealing and a substantial improvement of the thermal insulation; and its manufacturing process, consisting of a u00e9rie parts simple and easy construction.The maintenance of the capacity of thermal insulation of cryogenic vessels is very important both in respect to the economy of cryogenic liquids and the safety of the material to be stored in them.The device mounted between the vacuum pump and the cryogenic container, allows the same to be hermetically sealed to the end of the evacuation operation without increase of pressure and without the use of any welding or mechanical methods of sealing by means of simple movement of clamping a P. Arafuso.Even if a high vacuum is generated in a container hermetically sealed, there is no guarantee that a low pressure will continue over time. This device facilitates maintenance operations allowing repeated evacuation operations without prejudice to the quality of sealing and thermal insulation.