APPARATUS FOR OPENING AND CLOSING THE ASCENSION PIPE LID AND VALVE FLAP ON THE ASCENSION PIPE OF A COKE OVEN

摘要

The ascension pipe flap is pivotally supported on a shaft that is, in turn, rotatably supported by a portion of the collecting main outwardly beyond the ascension pipe. A counterweight and a lever are nonrotatably secured to the same shaft. The ascension pipe lid is connected by means of a first lever to a shaft and a second lever is connected to the same shaft. A telescopic actuator is connected to one end to the lever associated with the ascension pipe flap and at the other end to the second lever associated with the ascension pipe lid. In normal operation, when the ascension pipe is connected to the collecting main, the ascension pipe lid is closed and the ascension pipe flap is opened to permit flow of gases through the ascension pipe to the collecting main. When it is desired to close the ascension pipe, the telescopic actuator is retracted and because of the lever and counterweight, the torque required to close the valve flap is less than the torque required to open the ascension pipe lid and the ascension pipe flap first closes. Thereafter continued retraction of the telescopic actuator opens the ascension pipe lid. Similarly, when it is desired to connect the ascension pipe to the collecting main, the telescopic actuator is extended and because the torque for closing the ascention pipe lid is less than the torque for closing the valve flap, the ascension pipe lid first closes and thereafter the valve flap opens.