| 摘要 |
<p>A fluid injector particularly for injecting fluid into a furnace comprises a housing structure having inlet and outlet ports; a pair of fluid connections and means defining passageways for fluid between the ports and respective ones of the fluid connections; and valve means for controlling the flow of fluid along said passageways; a body assembly including an elongate tubular portion having provision for receiving a nozzle at its outer end; a pair of fluid connections and means defining passageways for fluid between each of the fluid connections and said outer end of the tubular portion; said housing structure providing a support for the body assembly and including fluid pressure means for displacing the assembly relative to the housing between a first position, in which the fluid connections on the body assembly are coupled to respective fluid connections on the housing structure, and a second position, in which the fluid connections on the body assembly are disconnected from the fluid connections on the housing structure, and mechanical interlock means arranged to allow said valve means to be operable to permit the flow of fluid along the passageways when the body assembly is in the first position, but not operable when the body assembly is in the second position, and for preventing the body assembly from being moved from the first to the second position when said valve means permit the flow of fluid along the passageways.</p> |
