초록 ▼

A gas flow diverter receives large volumes of hot gases from a gas turbine into a chamber in which is a pivotally mounted blade adapted to close either the outlet port to a heat recovery steam generator or the outlet port to the stack. Each port is surrounded by an open channel, the two side walls o

A gas flow diverter receives large volumes of hot gases from a gas turbine into a chamber in which is a pivotally mounted blade adapted to close either the outlet port to a heat recovery steam generator or the outlet port to the stack. Each port is surrounded by an open channel, the two side walls of each of which are provided with an exposed seal arranged one beyond the other. One or both surfaces of the blade is insulated, the insulated surface(s) being covered with steel cladding and the uncovered surface being a stainless steel membrane adapted to resist corrosion from the hot gases. The steel cladding is connected through insulation to the underlying structure in a manner permitting but confining the expansion of the cladding. The blade\s border is provided with first and second marginal ledges adapted, respectively, when the blade is in a closed position to engage a different one of the two exposed seals bordering an outlet port, thus establishing the channel as a closed passageway surrounding the closed port which may be further sealed against leakage by discharging sealing air into it. The blade is shifted between its two operative positions by means of a reversible drive including toggle joints connected to the blade by a unit which is shiftable in response to forces exerted by the expanding or contracting toggle joints. During blade movement the sealing air is cut off and its passageway into the chamber closed against the escape of hot gases.

대표청구항 ▼

In a gas flow diverter for diverting hot gases from an inlet port to either of first and second mutually spaced outlet ports of a chamber by a blade pivotally mounted to swing between two positions within the chamber in each of which one outlet port is closed by the blade and the other is opened, sa

In a gas flow diverter for diverting hot gases from an inlet port to either of first and second mutually spaced outlet ports of a chamber by a blade pivotally mounted to swing between two positions within the chamber in each of which one outlet port is closed by the blade and the other is opened, said blade being connected to a pivot shaft rotatably mounted within said chamber and being linked by toggle joints to an actuator shaft spaced from and parallel to said pivot shaft, the improvement comprising a marginal frame about said blade, both sides of which comprise first ledges, and a central projection, both sides of which comprise second ledges, a U-shaped sealing frame surrounding each outlet port, and comprising first and second side walls, with said first side wall longer than said second side wall, each of said sealing frames secured to the chamber wall and having an open end that opens into the chamber; and leaf spring sealing members mounted on said side walls; the sealing members of said first and second side walls being constructed and arranged to enter into sealing engagement with said first and second ledges, respectively, on the appropriate side of said blade marginal frame when said blade is in one of said two positions and said actuator shaft being operable to adjust the position of said blade between said first and second positions.