Patent GB-732511-A (GB)
Title: Improvements relating to door handling means for horizontal chamber coking ovens
IPC: C10B25/14
Filed: 1953-07-07
Abstract: 732,511. Handling mechanism for coke-oven doors. KOPPERS GES., H. July 7 1953 [July 17, 1952], No. 18825/53. Addition to 699,399. Class 55 (1). Apparatus for handling coke-oven doors by means of which an unlatched door can be lifted, withdrawn and moved or pivoted aside, and in which devices operable by pneumatic or hydraulic pressure are used in accordance with the parent Specification, is characterized by the use of a change-over device for controlling the supply of pressure fluid to the door handling apparatus, the change-over device comprising a rotary control member disposed in a housing and provided with ducts such that as a result of operation of this control member the thrust motor, unlatching devices and retracting motor are connected in turn to a source of pressure fluid supply and then when such connection has been completed, can be exhausted of fluid pressure successively in the same order. As shown in Fig. 1, the door handling mechanism for a coke-oven door 2 is mounted on a trolley 7 and includes a vertical beam 11 carrying bearings 12, in which door-lifting levers 13 and 14 are pivotally mounted. The levers 13 and 14 are operated in common by pneumatic thrust means 18, 27 connected to the lever 13 by a rod 37. The beam 11 also carries pneumatic pressureapplying devices 19 and 20, which are used to compress the closure springs 5 of the door latches 6 when the door is to be unlatched. The pneumatic thrust means 18, 27 shown in Fig. 2 comprises a motor 18 and a motor 27 having respectively envelopes of expansible material, e.g. synthetic rubber, disposed between thrust rings 22 and 28 and a fixedly mounted ring 24, the rings 22 and 28 being threaded on an axially displaceable shaft 23 which can move through the ring 24 and are arranged to bear on an intermediate ring 29, which is capable of axial movement. The outer ends of the envelopes are engaged between closure rings 31 and clamping rings 33, and the shaft 23 is keyed to the rod 37 so as to be rotatable relatively thereto. The motor 18 is connected to a source of compressed air by a pipe 40, and the motor 27 by a pipe 41. Grease containers 44 supply grease automatically to the envelopes by ducts 45, 45a, 49 and 49a. The rotary change-over device 54 (Fig. 3) comprises a cylindrical housing 55 having a central recess covered by a plate 66, and four horizontal conduits 57, 58, 59 and 60 (Fig. 5), two of which 58 and 60 are shown also in Fig. 3. Conduits 57 and 59 are connected to the compressed air pipes 40 and 41 of motors 18 and 27, whilst conduit 58 connects with pipes 90 and 90a leading to the pressure-applying devices 19 and 20, and conduit 60 serves for exhaust. A rotatable control member 61 is mounted in the housing 55 and is arranged to turn with a spigot 56 having a central bore 70. The spigot 56 is axially immovable, and the rotary member 61 is urged fluid-tightly against surface 64 of the housing 55 by compressed air admitted through pipe 53. The spigot 56 is provided with a collar 192, and is connected thereby to a rotatable bush 73 and an operating lever 76, which carries a spring- pressed pin 78 which engages on rotation of the bush 73 in a series of four detent notches, two of which, 80 and 83, are shown, formed in the periphery of a ring 79 attached by screws 84 to the housing 55. The rotary member 61 is traversed by openings 85, 86 and 87 parallel to the bore 70 of spigot 56, and a free space 89 between spigot 56 and member 61 communicates with a segmented opening 88 in the member 61 and, as shown in Fig. 5, makes communication with three ducts 91, 92 and 93 in the housing 55, which lead respectively to ducts 57 ,58 and 59. An annular channel 94 formed in spigot 56 connects with duct 60, and through a duct 95 with the bore 70. A locking device is provided which is releasable by moving a pivoted lever 100 to allow rotation of the bush 73 and arm 76, and hence of the rotary member 61. In operation by rotation of member 61, compressed air is supplied successively to pipes 40, 90 and 90a, and 41 through the openings 85, 86 and 87 and the ducts 91, 92 and 93. Thus member 61 is positioned so that compressed air is first supplied to motor 18 which operates to move levers 13 and 14 upwardly, and then by further rotation of the member 61 compressed air is supplied to the pressure-applying devices 19 and 20 so that the door can be disengaged from the latches 6 and removed. In replacing the door from a position above the latches the member 61 is again rotated to supply compressed air to the motor 27, and the door can be lowered onto the latches. Still further rotation of the member 61 connects the motors 18 and 27 and the devices 19 and 20 to the exhaust line 60. A time delay device 109 (Fig. 1) may be arranged in the conduit 41 of the motor 27 to permit from this motor only a gradual exhaustion of the compressed air.