US1589689A - Boiler - Google Patents

Description

June 22,1926. 1,589,689

P. HEAY BOILE Filed Jan. 4?: 1922 l ooo o'o oo INVENTR Phulo Hey Patented June 22, 1926.

UNITED STATES 1,589,689 iaa'rEN'rA OFFICE.'y

` PI-IILLIP HEAY, OF VANCOUVER, BRITISH COLUMBIA, CANADA.

EOILER.

Application filed January My invention relates to improvements in boilers, with more particular rete-rence to those used in hot water heating systems, although myl improvements may be applied to steam boilers also, and the object of my in vention is to provide a boiler of simple and strong construction in which the heatingsurface in relation to the water space and size of the boiler is very large so that it may be constructed at a comparatively low cost and' o erated with creat econo-m f and eilicienc 2:1

I attain these objects by the construction illustrated` in the accompanying drawings in whichv Fig. 1 is a longitudinal sectional elevation taken on the centre line of the boiler.

Fig. 2 is a cross sectional elevation'talren on the line 2-2 of Fig. 1.

Fig. 3 is a sectional plan view taken on the line 3-3 of Fig. 1.

-Fig. 4 is an outside end elevation of the boiler. V

Similar figures of reference indicate similar parts throughout the several views.

In construction the boiler may be rectangular withsquare ends or any other aproved design, although in its preferred iorm, as illustrated, the ends are semi-circular.

The lower portion which in height is approximately half the height of the complete boiler consists of an outer shell, indicated generally by the numeral 1, having the top plate 2, side plates 3 and 4, and the end plates 5 and 6, within which outer shell is arranged the firebox, indicated generally by the numeral 7 having the top plate 8, side plates 9 and 10, and end plates 11 and 12, the lirebox being spaced from the outer shell so that a lower water chamber 13 is provided between the irebox and the shell and which extends around the top, sides and ends of the irebox, the bottom of this water chamber being closed by a mud ring 14, all as shown in Figs. 1 and 2. The sides and ends of the irebox are stayed from the sides and ends of the outer shell by means of stays 15 and the front half of the top plate 8 of the firebox is stayed kfrom the top plate 2 of the shell by stays 16, while the rear haltl of the top plate 8 of the irebox is stayed from the top plate 2 of the shell by means of stay tubes 17, these stay tubes being pitched close together and preferably arranged in parallel rows, as shown in Figs. 1, 2 and 3.

18 indica-tes an intermediate water cham- 5, 1922`. Serial No. 527,188.

ber disposed above and spaced from the lower outer shell 1, this water chamber being enclosed by spaced upper and lower plates 19 and 20 respectively, the side plates 21 and 22 and the Iplates 23 and 24 and being supported from the outer shell 1 by the'side plates 25 and 26 and the end plates 27 and 28,` which plates, besides supporting the water chamber, also form a shell to enclosel .the space between the chamber and ,the outer shell 1 so that a combustion chamber 29. is formed, as shownin Figs. lfand 2. .The front halves of the plates 19 and 20 are stayed from each other by means of stay tubes 3'0 pitched close together and prefer-- ably arranged in parallel `rows while the rear halves of the plates are stayed from each other by stays 31, and between the low`- er water chamber 13 and thev intermediate one 18 extend vertical water tubes32 and 33, which water tubes are positioned adjacent the 'front and rear ends of the water chambers respectively and, extending through the combustion chamber 29, establishcommuni-i cation between them. f

34 indicates an upper water'chamberdis- 'posed above and spaced from the intermediate water chamber 18, this water cham; ber being enclosed by spaced upper and low# erplates 35 and 36, the side plates 37 and 38,- and end plates 39 and 40 and being supported from the intermediate chamber 18 by the side plates 41 and 42 and end plates 43- and 44, whichyplates, besides supporting the water chamber 34,also form a shell to enclose the space between this chamber and the intermediate one so that a combustion chamber or smoke chamber45 is `formed, as shown in Figs. 1 and 2. The *upper and lower plates of the water chamber 34 are stayed from each other by vertical stays 46 while the side plates 37 and 38 are stayed from each other by transverse stays 47, and communication is established between the upper and intermediate water chambers respectively by vertical water tubes 48 and 49 positioned towards each side of the chambers and a short distance in front of the transverse axis of the boiler.

The rear end of the chamber 45 is provided with an opening 50 to which the lower It is-not-thought necessary to show or describe .the various joints throughout the boiler in detail as it will be readily understood that these arevinaccordance Awith the best practice "in V'boiler construction; it may be pointed out, however, that the designof the boiler is such that practically all the joints may be Welded or riveted with the utmost facility.

'In operation vthe flame, hot s, and smoke fromthe lirebox pass rup through the rearstaytubesxl 4into the rear end of the lower .combustion `chamber 29, travel forwardly therethr-oughgto pass up through the front stay tubes 30 into the `fomard end of the Vupper combustion,chamber e5, through which they travel rearwardly and pass out through the opening V into the lchimney 51,*.as indicated bythe arrows in Fig. l. lVith reference therefore to i the ,lower -iaater chamber it `will' be seen thatthe lwater thereinis ,heated through Vaflarge area of heating surface :formedb-y the-area of thetog, side-:andL end plates forming the tirebozr. and the combined peripheral area ,of the stay tubes 17 which .pass'fthrough the water, to which zarearfshouldbe addeththat of the top platebfthe shell 1,since'` this is heated by the :heatpassing through .the .combustion chamber 29,;so that the total area of-heating surface available for heating the vWater in the lower-chamberl vis very largein coni-l parison with the ,amount of Watery contained in the chamber. This is also the case in the intermediate water chamber 18 the heating surfacearea available to heat the water therein being made up ofthe areaofthe lower plate'QO whichfisheated by the hot gases passing ,throughA the combustion chamber 29, theI combined,r peripheral area of stay tubes 8O whichzpass through the water and are :heated by the gases passing through them, and the area of thelupper plate 19, which islieated by the gases asithey pass through the` upper combustion chamber 45. on their-'Way to-the chimney, thegases at the Sametime heatingy theV lower plate 3G- ofA the upper :Water chamber 34 and also the water tubes .48 --and 49,-the vlower Vwater tubes and 33 being .heated by .the gases `in the lower combustion chamber, from all of which `it will be seen that the utmost use is made .of the heat units between theliregrate and the chimney, thus ensuring great efficiency and economy in the operation of the boiler.

Vilhat I claim as my invention is A boiler comprising a fire box, a shell enclosing the fire box and spaced therefrom so as to provideia-shallow water chamber above and atthe sides ofthe tire bo;;, a second shell superposed on the first shelha Lsecond flat shallow water chamber superposed 0n the second shell and ,composed of spaced plates, thelower of 1which "cooperates with the shell to provide a lower con'ibustion chamber between the first andsecond .water chambers, a third-shell supe-rposed on the second `Water chamber, a third Water chamber-superposed on the third shell composed of spaced plates, the vlower of which cooperates with the adjacent shell-to provide an upper combustion chamber whichis positioned between the second iand third water chamber, a plurality of vertical stay tubes extending through the first water chamber from the fire box to the y lower combustion chamber on the rea-risideofithetnansverse axis of the boiler, a pluralityof verticahstay tubes extending through `the second .water chamber from the lower combustion Ychamber to the uppercombustionchamber onthe frontside of the transverse Kaxis ofthe boiler, stay bolts arrangedthroughthe remaining portionsv of the two Water chambers andalso through all of the third water chamberwa tubular connection Vbetween lthe rear wend of the first water chamber and the second Water chamber,.a tubular connectionbetween the front ends of said lirst andsecond water chambers, and a pair of tubular connections between the second and third water 4chambers arranged on oppositeside ofthedongitudinal aXis of theboiler ,.ashort distance in front of its transverseaxis.

In testimony whereof `affix `m'ytsignature atthe city of Vancouver, B. C., the y21st day of December, v1921.

AP HILLIP -HEAY

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