. Railway mechanical engineer . move-ment in the drum may be maintained. The cleaner is loadedthrough one end of the drum and the entire load of cleanedtubes is ejected in one operation. The rattler drum has a diameter of 50 in., and is 25 inside. It has a capacity of 300 two-inch boiler tubes,250 2;4-in. boiler tubes or 50 superheater flues. From one car, or cradle, if crane service is available, thus eliminatingone handling of the tubes. The drum is driven by a 25 hp. motor ojjcrating at 400revolutions per minute through gears which reduce the rota-tion of the drum to 30 revolutions
. Railway mechanical engineer . move-ment in the drum may be maintained. The cleaner is loadedthrough one end of the drum and the entire load of cleanedtubes is ejected in one operation. The rattler drum has a diameter of 50 in., and is 25 inside. It has a capacity of 300 two-inch boiler tubes,250 2;4-in. boiler tubes or 50 superheater flues. From one car, or cradle, if crane service is available, thus eliminatingone handling of the tubes. The drum is driven by a 25 hp. motor ojjcrating at 400revolutions per minute through gears which reduce the rota-tion of the drum to 30 revolutions per minute. The cleaningprocess is simple and effective. Rattlers of the usual typedepend en the shock of impact of the tubes against eachother to crack and remove the scale. In the Baird rattlerthe tubes are not subjected to impact, but are rotated oneagainst another. The friction of this rotation generates alarge amount of heat, and the rise in temperature causes thecracking and removal of the scale. .\s the scale is removed. Baird Flue Cleaner to six hours per load is required for thorough cleaning, thetime depending on the nature and thickness of the scale. One end of the drum is closed with douijle doors hinged atopposite sides, through which the tubes are placed in thedrum. At the opposite end is placed a movable bulkhead,which is operated by the piston in a 14-in. air cylinder. Fortubes requiring less than the full length of the drum, this bulk-head is moved in far enough so that the length of the clean-ing chamber is but inches longer than the tubes to becleaned. The length of the air cylinder is such that, afterthe tubes have been cleaned, the bulkhead may be used topush the complete set ejected from the drum into a pu.«h in this manner it is pulverized b\ the movement of tin- fluesagainst each other, all moisture is expelled by the heat, andthe pulverized scale, which ultimatel} assumes the finenessof flour, forms an effective scouring compound. The finelyground
Size: 2319px × 1078px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
