Patent GB-857184-A (GB)
Title: Coke-oven door
IPC: C10B25/12
Filed: 1958-05-16
Abstract: 857,184. Coke oven doors. SOC. D'ETUDE DE CONSTRUCTION EVENCE COPPEE S.A. May 16, 1958 [May 20, 1957], No. 15812/58. Class 55 (1). A coke oven door 2 is fitted with springs 4 pressing it against a frame 3 integral with the oven, themselves bearing against bolts 7 which rock simultaneously into an unlocking position after springs 4 have been moved away from the same by members carried on door 2 and operated by a door removal mechanism which raises the unbolted door prior to removing it from frame 3, characterised in that the aforesaid members are connected between themselves by a mechanical linkage comprising a horizontal traverse disposed so as to be capable of being lifted by a conventional door removal mechanism (shown in broken outline in Figs. 2 and 3) having a lever 16 capable of hooking on to a traverse on door 2 by pivoting about a horizontal axis, and in that the said mechanical linkage is fitted, at one end, with a projection 29 which causes the bolts 7 to rock into their unlocking position after the aforesaid members have moved springs 4 away from the latter, and, at the other end, with a stop 32 which encounters a member integral with the door after the bolts 7 have been brought into their unlocking position. As shown, springs 4 are compressed between door 2 and shoulderpiece 5 of a sliding rod 6 serving as a pivot for bolt 7. The latter is immobilized axially in relation to rod 6 between shoulderpiece 5 and a pin 35. To facilitate the action of unbolting the door, springs 4 are compressed still further by moving rod 6 in direction of arrow X so that bolts 7 no longer make contact with hooks 8, 9 integral with frame 3. The horizontal traverse is fixed to two bars 18 forming part of the mechanical linkage and slidably mounted in guides 19 integral with door 2. Traverse 20 connecting bars 18 is raised by lever 16 of the door remover. Bars 18 are kept in the rest position by adjustable stops 21 and as seen in Fig. 3 rods 22 which join bars 18 are constructed such that the upper one is straight and the lower one is bent. Connecting rods 22 are in turn joined to arms 23, keyed on shafts 24 supported by bearings 25 fitted to door 2 by bolts 26 and assembled after springs 4 have been placed in position by bolts (not shown) which pass through holes 27. Each shaft 24 carries a cam 28 which, when bars 18 are raised by the door remover mechanism, push back, in the direction of the arrow X, the corresponding rod 6. When bolts 7 cease to be applied against hooks 8, 9 projection 29 integral with the upper connecting rod 22 encounters bolt 7 and causes it to rock into its unbolted position as shown in Fig. 5. The upper bolt is joined to the lower one by connecting rod 30 and thus the unbolting of both occurs simultaneously. Connecting rod 30 is weighted by a counterweight 31 acting in the direction of locking. Instead of this connecting rod 30, a second projection of the same type as 29 may be provided on the mechanical linkage uniting the two cams 28. Stop 32, fitted to the mechanical linkage for raising and removing door 2 after the two bolts have been unbolted, encounters a member integral with the door e.g. lower guides 19. When the door is replaced in position by the door removal mechanism, the pivot action of lever 16 in a clockwise direction in Fig. 3 permits bolts 7 to come back into their locking position and cams 28 to leave rods 6. The latter then take up the positions shown in Figs. 2 and 4 under the action of springs 4 which once again apply door 2 firmly against frame 3. In a modification, Fig. 7, instead of keying a cam 28 on shaft 24, an eccentric plate 28<SP>1</SP> is keyed on same. The latter is engaged in a collar 61 integral with sliding rod 6. This slides in a sleeve 33 around which are engaged springs 4, the sleeve being provided with a rim 34 bearing against bolt 7. This sleeve is engaged with a little play, in bearings 25 allowing rod 6 to follow the slight variations in the level of eccentric plate 28<SP>1</SP>.