Coke oven levelling bar drive - with rope tension control by reducing valve and accumulator in hydraulic system

摘要

A levelling bar for horizontal chamber-type coke ovens is driven by a hydraulic motor with an accumulator in the system, large enough to withdraw the bar by its own power. The tension of the levelling bar rope on the pushing and levelling machine is adjusted by hydraulic or pneumatic units and it is kept constant independently of differential thermal or mech. stresses by a pressure reducing valve in the fluid circuit.