| 摘要 |
951,875. Storing liquefied gases. SUPERIOR AIR PRODUCTS CO. Sept.17, 1962 [Oct. 9, 1961], No. 35293/63. Heading F4P. A container for the storage of liquefied gas comprises a storage chamber 10 having a vacuum jacket 13 thereabout, a first tube 27 communicating at one end thereof with the chamber 10 for the introduction and removal of the liquefied gas, a second tube 29 arranged in spaced relation to the tube 27 through a major portion of the length of the tube 27 which with the tube 29 defines an elongated space 30 communicating at one end thereof with the chamber 10, and a pressure relief valve 32 communicating with the space 30 and arranged to open to the atmosphere, the space 30 being closed except at the said one end thereof and at the pressure relief valve. The chamber 10 is defined by a wall 11 which is surrounded by a spaced wall 12, the space between the walls 11 and 12 forming the jacket 13. The jacket 13 may be insulated by other means, e.g. multiple reflector shields. Another wall 14 surrounds the wall 12, the space 15 between the walls 12 and 14 being filled by another liquefied gas which acts as a heat shield. If the stored gas is helium, hydrogen or neon, the other gas may be nitrogen. An outer wall 16 surrounds the wall 14, the space 17 between the walls 14 and 16 being evacuated; the space 17 may be insulated by other means also. The walls 11, 12, 14 and 16 and the tubes 27 and 29 are preferably made of stainless steel or Monel metal. A tube 34 is spaced from and surrounds the tube 29 and is preferably made of copper or a copper alloy having high heat conductivity, the space 35 between the tubes 29 and 34 being sealed by a ferrule 36 made of the same material. A tube 37 is spaced from and surrounds the tube 34 and tube 39 is spaced from and surrounds the tube 37, the tubes 37 and 39 being made of stainless steel or Monel metal; alternatively the tube 39 may be made of copper. A ferrule 42 seals off the space 40 between the tubes 37 and 39 and extends almost to the tube 29 to which it is joined by a bellows member 45. A filling tube 46 extends through the space 38 into the gas space 15, the gas in the latter being vented to atmosphere through a tube 47. A serrated ferrule 48 made of copper or copper alloy extends between the tubes 27 and 29 in the area of the ferrule 36. The above construction ensures that heat travelling down tubes 27 and 29 will be diverted away from the gas in chamber 10 to that in space 15. The serrated ferrule 48 may be replaced by a ferrule having axial holes passing therethrough. |
