Locomotive appliances . ong the head would notpass their share. (This is due to the fact that allliquids under pressure will seek the nearest outletfirst.) To overcome this, the small (Mid of the suckernearest the opening in the center of the draw oil headis made the smallest, and the size of the othersincreases with the distance from the center. Thematter surrounding this is always water soaked, andis a soft slush, which is easily removed by the pressurein the boiler. 22 338 LOCOMOTIVE APPLIANCES. As the impurities are over and around the draw-offhead in front of the water and steam, the pres
Locomotive appliances . ong the head would notpass their share. (This is due to the fact that allliquids under pressure will seek the nearest outletfirst.) To overcome this, the small (Mid of the suckernearest the opening in the center of the draw oil headis made the smallest, and the size of the othersincreases with the distance from the center. Thematter surrounding this is always water soaked, andis a soft slush, which is easily removed by the pressurein the boiler. 22 338 LOCOMOTIVE APPLIANCES. As the impurities are over and around the draw-offhead in front of the water and steam, the pressure inthe boiler pushes them out through the suckers intothe blow-off pipe before any water or steam can passthrough. There is no waste of water, as the blowing offis stopped as soon as the water shows clear. This iswhat reduces the waste of water to a minimum. Thedraw-off head here shown is a great improvement overthe old head formerly used; even if they should stopup from neglect, they can be cleaned from the outside. Fig. 2. Hornish Mechanical Boiler Cleaner.(Sectional View Through Front of Boiler. by forcing water through them. They cannot scaleup, since there is no heat next to them from the firebox. Each part of the cleaner is a companion to theother, and what one leaves undone the other two must be used together to obtain perfectresults. When the water is boiling the impurities come to thesurface in a boiler the same as in an open vessel. Theproper circulation in a locomotive boiler is down to thebelly of the boiler after water leaves the check, then LOCOMOTIVE APPLIANCES. 339 down the forward leg along the side and up the backleg over the crown sheet, and forward over the top ofthe flues, striking the front head of the boiler, fromwhich point it starts to repeat the same course overagain. It is here at the front end of the boiler and atthe surface that the skimmer intercepts the impurities,settling and removing them before they have time totouch the hot flues
Size: 2077px × 1203px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
