GB1295141A - - Google Patents

Abstract

1295141 Cleaning coke oven door flanges ALLIED CHEMICAL CORP 3 July 1970 [18 July 1969] 32463/70 Heading F2N A device for cleaning the flanges 13 of a coke oven door 10 (Fig. 1) comprises a cleaner head 12 pivotably mounted on a carriage frame 51 via a pair of counterbalance arms 52. The counterbalance arms 52 are also connected via spring units 61 to the frame 51 and the height of the cleaner head 12 may be adjusted by nuts 64. A bell-crank 54 is connected via turnbuckle 66 to the head 12 at 67, the other arm of the crank being resiliently secured to frame 51 at 71 so that adjustment of the turnbuckle can cause the head to be inclined from the vertical when at rest. The carriage frame 51 is connected to a trolley with rollers 76, 77 running on parallel tracks 78. A coke oven door to be cleaned is presented to the cleaner head 12 and the ram 80 operated to advance the head towards the door. The head 12 is adjusted by the tumbuckle 66 so that the first engagement is between an inverted U- shaped slot 14 on the door and a spring-loaded finger 38. Subsequent movement of the head engages a profiled roller 44 on a co-operatingly profiled head 15 on the door, thus ensuring correct registration of head and door. The flexibility required to achieve this is achieved by making pivots 53, 57, 58 of the ball-jointed swivel bearing type. When in plumb position the head and door are locked together by clamps (97) (Fig. 13, not shown) on arms 91 after rotation of a crank-shaft (108). After cleaning the carriage frame 51 is retracted and the device centred by the ends of the arms 52 being engaged by guides (88) (Fig. 10, not shown). Scrapers.-Two scrapers progress round an endless path corresponding to flange 13. The scrapers 134 (Fig. 17) are spring-mounted on members 133 carried by the front section 132 of a scraper head 131, springs 135 allowing relative movement to prevent jamming on uneven deposits on the door. The scraper head 131 is mounted on parallel shafts 115 (118), the former carrying rollers 117, 116, and the latter bearing rollers 118, 119. The rollers run on wear strips 31 lining a pair of guides 25, 26 which are formed between Z-shaped strips 20, 21 (see also Figs. 1 and 2). The guides form the endless path for the carriage 30 (Fig. 17) and correspond in shape to the rectangular flange 13 on the oven door. To prevent the carriage 30 moving towards and away from the door a further guide rail 23 is provided on which guide rollers 128 run. Scraper drive.-A pair of endless chains 125, 127 run over sprockets 154, 155 on shafts 150-153, the shafts being placed at the corners of the rectangular guides 25, 26 (Figs. 1 and 2). Members 124, 126, mounted on carriages 30 (Fig. 17) are secured to links on the respective chains so as to move the carriages and scrapers when motor 156 (Fig. 2) drives shaft 150. The guides 25, 26 are cleaned by scrapers (147) (Fig. 18, not shown), mounted on shaft (143) which is attached to the chains 125, 127 by arms (142) and catches (144). The chains are adjusted and tensioned by moving the shaft bearings 161 by adjustment nuts 165.