公开(公告)号：US4292137A

公开(公告)日：1981-09-29

申请号：US184308

申请日：1980-09-05

申请人： Kenji Fujita ,  Yuji Shibata ,  Hisao Mikuni ,  Tsuneo Shibuya

发明人： Kenji Fujita ,  Yuji Shibata ,  Hisao Mikuni ,  Tsuneo Shibuya

IPC分类号： C10B25/14 ,  C01B25/14

CPC分类号： C10B25/14

摘要： An door lifter for coke ovens is provided with a door lifting or lowering power actuator consisting of two hydraulic cylinders connected in series and in back-to-back relationship. In the case of the door removal, first one of the two hydraulic cylinders is actuated so that the hooks are made into engagement with the corresponding lug pieces of the door and when they have engaged, said one hydraulic cylinder is stopped and locked. Thereafter the other hydraulic cylinder is actuated so that the door is lifted to be removed from the oven. In order to reengage the door, the other hydraulic cylinder is reversely actuated so that the door is lowered by the same stroke as the lift stroke and then said one hydraulic cylinder is reversely actuated so that the hooks are disengaged from the lug pieces of the door. In the case of the prior art door lifter of the type having a single hydraulic cylinder for lifting or lowering the door in two steps or strokes, there must be provided a hydraulic control circuit which is very complex in construction and expensive, but the use of two hydraulic cylinders can considerably simplify the hydraulic control circuit.

摘要翻译： 用于焦炉的门提升器设置有门提升或降低动力致动器，其由串联连接和背对背关系的两个液压缸组成。 在门拆卸的情况下，两个液压缸中的第一个被致动，使得钩与门的相应的凸耳片接合，并且当它们接合时，所述一个液压缸被停止和锁定。 此后，另一个液压缸被致动，使得门被提升以从烘箱中移出。 为了重新接通门，另一个液压缸被反向致动，使得门以与升程行程相同的行程下降，然后所述一个液压缸反向致动，使得钩与门的凸耳片脱离 。 在现有技术的具有用于以两步或中风提升或降低门的单个液压缸的门式升降机的情况下，必须提供一种在结构上非常复杂并且昂贵的液压控制回路，但是使用 两个液压缸可以大大简化液压控制回路。