摘要:
The object of the present invention is to provide a method for cutting with gas which uses a cutting tip including a preheating hole for forming a preheating flame with a fuel gas and an oxygen gas for preheating, and an oxygen gas hole for cutting a workpiece by injecting oxygen gas for cutting, and which can decrease an amount of hydrogen gas used by supply a fuel gas to the preheating hole, which is appropriate in both heating and cutting the workpiece, and an apparatus for cutting with gas, and the present invention provides an apparatus for cutting with gas (30) which supplies an oxygen gas, and a fuel gas to a cutting tip (20) including a preheating hole (23) and an oxygen gas hole for cutting (22), wherein the apparatus (30) includes a supply circuit for oxygen gas (50), a supply circuit for hydrogen gas (41), a supply circuit for hydrocarbon-based gas (45), and a gas supply control means (60), and the gas supply control means (60) can alter a ratio of the hydrogen gas and the hydrocarbon-based gas which are supplied to the preheating hole in a case of heating the workpiece and a case of cutting the workpiece.
摘要:
PROBLEM TO BE SOLVED: To provide a cryogenic vessel heating device capable of heating a cryogenic vessel efficiently in a short time, and a method of heating a cryogenic vessel.SOLUTION: A cryogenic vessel heating device 1 comprises: a cryogenic vessel 11 for containing gas G; a compressor 21 for adiabatically compressing the gas G discharged from the cryogenic vessel 11 to raise the temperature of the gas; and a circulation path 31 for circulating the gas G between the cryogenic vessel 11 and the compressor 21. The compressor 21 and the circulation path 31 are configured to integrally form a movable compression unit.