US271482A - Method of setting steam-boilers - Google Patents

Description

\ (No Model.) 3 Sheets-Shet 1.

W. J. F. LIDDELL.

METHOD OF SETTING STEAM BOILERS.

- No. 271,482. P tenteghmsm 83.

WITNESSES 1.7V V' TOR Attorney 3 Sheets-Sheet 2.

(No Model.)

W. J. F. LIDDELL.

METHOD OF SETTING STEAM BOILERS.

Patented Jan. 30,1883.

, I r IJVVENIOR WITNESSES 2. 9:, W fly (No Model. 3 Sheets-Sheet 3. W. J. P. LIDDELL.

METHOD OF SETTING STEAM BOILERS- No. 271,482. 4 Patented Jan. 30,1 3.

WITNESSES .Attorney WWW A waw TATES ATENT METHOD OF SETTING STEAM-BOILERS.

SPECIFICATION forming part of Letters Patent No. 271,482, dated January 30, 1883,

Application filed December a, 1882. (No model.)

lb all whom it may concern:

Be it known that I, VVAL'IER J. F. LIDDELL, of Charlotte, county of Mecklenburg, State of North Carolina, have invented a new and useful Improvement in the Method of Setting Steam-Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing making part of this specification.

My invention relates to the manner of setting a horizontal steam-boiler having flues through which the products of combustion pass from end to end of the boiler, whereby the heat from the boiler is utilized, as far as practicable, and at the same time the liability of injury to the supporting walls or partitions, due to the expansion and contraction of the metal, is obviated,as hereinafter explained.

In theaccompanying drawings, Figure 1 represents a longitudinal vertical sectionthrough the brick-work, showing the boiler in side elevation, partly broken away to show the arrangement of the'flues. Fig. 2 is a horizontal section of the same, taken below the line of the boiler, the relation of the latter thereto being indicated in dotted lines. Fig. 3 is a vertical transverse section through the boiler and its setting or brick-work, taken on the line a; m, Fig. 2. Fig. 4 shows in vertical transverse section a modification in the form of the boiler, or rather of the steam-dome applied thereto; and Fig. 5 shows a setting or brick-Work adapted to such modification in the form of the boiler.

A represents a horizontal boiler, B the flues, passing through said boiler from end to end, for permitting the passage of the products of combustion, and U the steam-dome applied to the boiler, said parts being constructed in any usual or preferred way.

ln the setting of a boiler of the form shown in Fig. l the brick-work is composed of the usual side walls, 1) and l), and end walls, D and D built upon any suitable foundation, and which, with the arching brick covering D serves to inclose the boiler proper, as shown.

, In addition to these inclosing -walls there are )artitions D and D own which the boiler I 1 l rests and is supported, said partitions dividing the chamber, inclosiugthe boilerinto three compartments, E, E,and E the first, E, forming the combustion-chamber or fire-pot, the

last named, E the descending chamber or flue, into which the products of combustion, escape after passing through the fines B, and E the central compartment, into which said products pass underneath the boiler from the chamber E and in which they pass up and around the boiler to the smoke-stack F, communicating with said chamber E. The boiler, at its ends, overhangs or extends beyond the supporting-partitions D and D the extreme ends being unsupported and left free to move to conform to the expansion of the cylindrical shell or body ofthe boiler, and theforward end, as will be seen,overhangs the grate G, reaching forward two-thirds (more orless) thelength from rear tot'rontofthe chamber E. By this a-rrangement the products ofcombustion are compelled to pass forward near the front end wall, D in order to reach the mouth cfthe fines B, through which only they can escape. Theside walls of the combustion-chamber E are made thicker than. those of chambers E and E by about the thickness of the lining of fire-brick used in said chamber, and this serves to form a supporting-ledge upon which the forward end of the boiler, projecting within said'chamdotted outline of-said boiler in Fig. 3, and which serves to prevent the passage of the products of combustion up by the sidesof the boiler in said chamber, forcing them forward to the mouth or forward ends of the tubes 13. After reaching the chamber E the products of combustion pass down under the boiler and forward through a flue or passage, E in the partition D to the chamber E, thence up around the central portion of the boiler and out through the smoke-stack communicating with said chamber.

In a boiler of the form shown in Fig. 1, where the steam-dome is located near the forward end, as shown, said dome, passingthrough and being firmly held in the brick cover or arch D becomes necessarily the fixed point of'the boiler, and any longitudinal expansion or contraction of the boiler-shell must be from said dome as a center, and to provide for this on said dome the boiler rests on small rollers a a, arranged in pockets or recesses b, which permit the movement of the rollers to accommodate such expansion and contraction, thereby her, rests on either side, as indicated by the' the supporting-partitions arranged in rear of relieving the partition-walls of the dragging action of the boiler on said walls and preventing the swaying and consequent injury thereto. which would otherwise result.

Where a boiler of the construction shown in Fig. 4 is employed, with the transverse cylindrical dome arranged about midway of its length, a. single supporting-partition only is necessary, as indicated in Fig. 5, arranged about in the same vertical transverse plane with the dome. In this construction, as the partition-wall D becomes the fixed center, the expansion being therefrom, no frictional roller support is required. In this construction, while but a single supporting-partition is required, a second may be used, if desired; but by bringing the sides and top of the brick arch in rear of the boiler into close proximity with the sides and top of the upper half of the boiler, as indicated at d, Fig. 5, leaving only about sutficient room to provide for the expansion longitudinally of the boiler, substantially the same effect of dividing the boiler-chamber into three separate compartments is obtained. The products of combustion, passing from the combustion-chamber E through the fines B to the rear end of the boiler at E are compelled to pass down under and thence forward and up around the boiler at E to the smoke-stack.

\Vhere a boiler ol the form or construction shown in Figs. 4 and 5 is employed, giving the large transverse cylindrical dome, the boiler portion proper, A, may have the flues B arranged through its entire area, leaving only space between them for the free circulation of the water, and the water-line in such case will be within the enlarged dome, as shown. In this last-named construction of the boiler the single supporting-partition l) is located at or near the center of the length of the boiler,the weight of the boiler being about balanced thereon, and the flue or neck 0, which connects it with the transverse cylindrical dome 0, passes through the brick-arch cover D, and serves, in connection with the setting of the latter in a semi-cylindrical bed in said cover, (indicated at H,) to effectually steady and also to assist in supporting the boiler in its setting, rendering the second supporting-partition unnecessary. The partition I) surrounds the boiler snugly from the foundation to the roof or cover, and prevents any escape of the products ofcombnstion except by passing forward and upward in front of the boiler and thence through the fines B, as explained.

By the arrangement and the manner of setting the boiler, as explained, a large heatingsurface is obtained, both on the inside of the boiler proper and upon the external surface, thus utilizing the heat as far as practicable in its passage through and up around the exposed sides of the boiler.

The front and rear walls, D and D are provided with the usual fire-door and man-hole, the latter afl'ording access to the fines for cleaning or repairs, and the side walls, either or both, have doors I, arranged below the plane of the grate and at the rear end thereof, as

shown, for admitting air to promote combustion and facilitating the forward and upward movement of the products of combustion, as

explained, the principal supply or draft of air beingthrough such door or doors 1.

Aside from the features particularly described, both the boiler itself and its walls or setting may be of any usual or preferred construction.

Having now described my invention, what I claim as new is 1. A horizontal tubular boiler supported upon a close partition-wall, with its ends pro jected one over the fire-grate and the other within a chamber in rear of said wall, its rear end placed in contact with or in proximity to the overhanging roofor arch, whereby the products of combustion are made to pass forward and upward in front of and through the boiler from front to rear, and thence forward and upward around the boiler to the smoke-stack.

2. A horizontal tubular boiler supported upon a close partition-wall and overhanging the fire-grate, whereby the products of combustion are made to pass forward and upward in front of and through the boiler from front to rear, in combination with a secondary partial partition-wall or its equivalent, whereby the products of combustion, after passing through the boiler from front to rear, are made to pass forward, under, and upward around said boiler, substantially as and for the purpose described.

In testimony whereof I have hereunto set my hand this 4th day of December, A. D. 1882.

\VARREN O. STONE,

SMrrI-I.

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