| 摘要 |
781,631. Storing gases under pressure. UNION CARBIDE & CARBON CORPORATION. Aug. 22, 1955 [Sept. 10, 1954], No. 24159/55. Class 8(2). A liquefied gas, e.g. oxygen container 11 mounted within and thermally insulated from a jacket 12 through which extends a filling and discharge tube 22 has a refrigerant container 28 in thermal contact with the liquid oxygen L ; the refrigerant being capable of change of state, e.g., from solid to liquid accompanied by absorption of heat at a temperature above the normal storage temperature of the liquid oxygen but below that at which the gas pressure is sufficient to open an automatic relief valve 25. A suitable refrigerant is dichlorodifluoromethane which is introduced as liquid through a duct 29 closed by a burstable disc 30. The container 28 is supported by braces 31 and container 11 by a tripod 16 within the jacket 12 which may be evacuated or filled with insulation. Charging with liquid oxygen is effected through the valved duct 22 until liquid issued from a trycock valve 27 and discharging is also effected through the duct 22 leading to a line 33 where it is joined by oxygen gas in a duct 40 connected to a gas release duct 24. The combined liquid and gaseous oxygen then traverses a vaporizing coil 35 surrounding the jacket 12 and is discharged as gas through a valved coupling 38. Alternatively the vapourizing coil is located within the jacket 12. In a modification the refrigerant is of the evaporative type, e.g. liquid nitrogen for use with argon in the container 11; the burstable disc being replaced by an automatic pressure relief valve 44<SP>1</SP>, Fig. 3 (not shown). |
