Oxygen gun fast changing device

The utility model discloses an oxygen gun fast changing device belonging to the technical field of metallurgy & steelmaking facilities. Three joints of flexible metal hoses are incorporated with the lower connecting base into one piece through flexible metal hose connecting pipe and connect with a lift lorry. Head joints of the flexible metal hoses are suited with O rings respectively. An oxygen gun is fixed on the upper connecting base. Seal covers corresponding to head joints of the lower flexible metal hoses are fixed on the upper connecting base and connect with the oxygen gun body. Press bolts are used to connect the upper and lower connecting bases. During changing of the gun body, what we need to do is only to loosen the press bolts to replace the gun. What is more, only O ring is required to be inserted between the upper and lower joints to realize sealing. The present utility model has simple structure and low manufacture cost, is convenient and quick for assembling and disassembling which can fulfill current requirements for quick-tempo and high efficient iron & steel production and can be widely applied in various similar mechanical equipments in other industries.