Patent GB-747350-A (GB)
Title: Improvements in or relating to coke oven door
IPC: C10B25/06
Filed: 1953-09-03
Abstract: 747,350. Coke oven doors. KOPPERS CO., Inc. Sept. 3, 1953. [Dec. 13, 1952] No. 24402/53. Class 55(1). A coke-oven door comprises a rectangular border member 21 (Figs. 1 and 3) carrying on its outer side a sealing member 26 adapted to seal against a sealing surface 15 of the door frame 12, a clamping plate member 90 surrounded by the border member 21, a flexible metal sealing diaphragm 105 secured by bolts to the border member 21 and to the plate member 90, and separate pressure transmitting means associated with the border member 21 respectively above and below the vertical centre of the door and each disposed along both the intermediate and end quarter portions of the respective door halves on which they are disposed, force exerting means operable between the door frame and the pressure transmitting means exerting force on the portions of the pressure transmitting means only at points located adjacent the upper and lower ends of the door and solely in the region of the uppermost quarter portions of the door to press the border member and its sealing member towards the sealing surface of the door frame. The border member 21 is formed of relatively heavy rolled steel plate which is substantially wider than it is thick and also is of varying width as shown in Fig. 2, so that different portions of the border member have different degrees of flexibility. The border member is about 7 ins. wide extending across the top and bottom of the door and also round the corners and for a short distance along the sides of the door, the width of the border member then abruptly decreases in width to about 4¢ ins. and this width continues from each end for a distance until at the middle of. the door the width increases and is again about 7 ins. On its inner side the member 21 carries upper and lower pairs of parallel arms 35 and 60 (Fig. 1) secured thereto by pairs of bolts 40 and 41 and 65 and 66 respectively in such a manner that the arms are spaced from the member 21 and so that movement of the arms relative to the member is permitted. As shown in Fig. 3 the inner edges of the arms 35 and 60 (35 is shown) are slightly offset in relation to the inner edges of the border member 21 and the arms 35 and 60 (Fig. 2) are wider adjacent their mid-points than their ends. The upper and lower ends of the arms 35 and 60 are connected by crossmembers 36 and 37 and 61 and 62 slightly offset relative to the arms as shown in Fig 3. As shown in Fig. 3, L-brackets 45 are secured to the inner faces of the arms 35 adjacent the mid-points of the arms, the brackets 45 being arranged to carry a latch bracket 46 having a central recess in which is secured a threaded bushing 50. The bushing 50 receives the threaded end of a shaft 51 which has a latch bar 52 rotatably mounted thereon between a collar 53 and a washer 55, the latter being secured by a cottar pin 56. The outer end of the shaft 51 is square as shown in Fig. 1 and is adapted to be received by a socket of a door machine (not shown). The latch bar 52 has an enlargement 57 which is engagable by the door machine for operation. The lower part of the door has a similar assembly of a latch bracket which carries a shaft 64 on which the latch bar is rotatably mounted. The arms 35 and 60 also carry hook brackets 70 and 74 adapted to receive the lifting hooks of the door machine. The border member has a hook 81 which is adapted to rest on a ledge 19 of the door frame 12 (Fig. 2) and thereby to support the door. The door frame 12 bears a series of hook plates 20 which are adapted to'co-operate with the latch bars 52 and 63. The clamping plate 90 mounted within the border member 21 is of such a size that when the plate is located centrally within the border member there is a space of about 2¢ ins. between the edges of the plates and the inner face of the border member 21. The plate 90 carries a refractory plug 102 and is secured to the crossmembers 36 and 37, 60 and 62 by bolts 91 and studs 92 respectively so that as shown in Fig. 3 the plate 90 lies forward of the inner edge of the border member 21. The bolts 91 and studs 92 are such that while the plate 90 is rigidly secured by the bolts 91 to the crossmember 36 against relative movement in a direction perpendicular to the plane of the door it is secured to the members 37, 61 and 62 by the studs 92 in a manner shown in Fig. 4, which permits a limited amount of movement relative to the border member 21 in the direction perpendicular to the plane of the door. In operation when the latch bars 51 and 64 are moved to exert pressure on the border member 21 through the arms 35 and 60, the pressure is first exerted on the upper and lower ends of the border frame before pressure is exerted on the portions of the border frame adjacent the middle of the door. The door when applied to the charging side of the oven may be provided with a chuck-door 125 (Fig. 8) for levelling the charge. The chuck-door covers an opening 120 in the plate 90 and has means 126 for urging the edges of the chuck-door into sealing contact with a marginal surround of the opening 120. The plate 90 when provided with an opening 120 may be reinforced by an angle-bar 139 bolted to the plate.