. American engineer and railroad journal . -tube boiler made by the Robert Poole & SonCompany, of Baltimore. The advantages claimed for this classof boilers are so well known that it is hardly necessary to re-state them here. The boiler shown is composed of lap-welded wrought-irontubes, placed in an inclined position, and connected by vertical the steam and water drum, prevents what is known as primingor foaming, the steam passing away from the boiler dry evenwhen the boiler is forced to its utmost capacity. 2. It causes a thorough commingling of the water through-out the boiler, and a consequ
. American engineer and railroad journal . -tube boiler made by the Robert Poole & SonCompany, of Baltimore. The advantages claimed for this classof boilers are so well known that it is hardly necessary to re-state them here. The boiler shown is composed of lap-welded wrought-irontubes, placed in an inclined position, and connected by vertical the steam and water drum, prevents what is known as primingor foaming, the steam passing away from the boiler dry evenwhen the boiler is forced to its utmost capacity. 2. It causes a thorough commingling of the water through-out the boiler, and a consequent equable temperature, thus pre-venting those very serious strains from unequal expansionwhich occur in all boilers of ordinary construction, and whichare a frequent cause of explosions. 3. Tlie rapid circulation prevents, to a great degree, theformation of deposits or incrustations upon the heating sur-faces, sweeping them away and depositing them in the muddrum, at the rear and lowest point of the boiler, whence theyare blown I HE VVAltR-TUKL BUILER. passages at each end, with a horizontalsteam and water tubes are staggered, or so placed that one row comes overthe spaces of the previous row. The vertical passages, or endconnections, are made of two plates of the best flange iron, orsteel, placed far enough apart to give full area for the circu-lation between the inclined tubes and horizontal drum Theplates are flanged at sides and bottom, and very stronglystay-bolted together. The tubes are expanded into the innerplate, and suitable hand holes in the outer plate admit thetubes and allow for cleaning. The connection to the drumis made in the strongest manner. The fire is made underthe higher end of the tubes, and the products of combustionpass up between the tubes into a combustion chamber underthe steam and water-drum ; from thence they pass down acrossthe tubes, then once more up through the spaces between thetubes, and off to the chimney. The water,
Size: 1875px × 1332px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
