US835749A - Steam-boiler. - Google Patents

Description

PATENTED NOV. 13, 1906. M. CONNOR.

STEAM BOILER.

APPLICATION FILED MAE.'1 6, 1906.

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I I B P 1 5 PATENTED NOV. 13, 1906.

M. CONNOR. STEAM BOILER. APPLICATION FILED MAR. 16, 1906.

2 SHEETS-SHEET 2.

a n ve u l'o'a MILES CONNOR, OF PUEBLO, COLORADO.

STEAM-BOILER.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed March 16,1906. Serial No. 306,441.

To (ti/Z whom it may concern:

Be it known that I, MILES CONNOR, a citizen of the United States, residing at Pueblo, in the county of Pueblo and State of Colorado, have invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to steam boilers or generators, and it is adapted to be used in connection with steam-generators having vertical flues therein, and more particularly with that class known as fire-engines.

The object of my invention is to provide means for protecting the upper portions of the flues whereby excessive expansion will be obviated.

A further object is to provide added heating-surface and to compensate for the slight additional expansion occasioned thereby.

A still further object is to provide a circulating means whereby the flues will be immersed in water throughout their entire length.

Other objects and advantages will be made clearly apparent in the specification, and pointed out in the claims.

In the accompanying drawings I have shown the preferred forms of my invention.

In said drawings, Figure 1 is a central vertical sectional view through the boiler. Fig. 2 is a transverse sectional view therethrough; and Fig. 3 is a sectional view of the lower end of a boiler, showing a slightly-modified form of construction.

Referring to the figures by numerals of reference, 1 is the outer casing of a boiler, 2 the fire-box, and 3 the usual form of flues, said flues being secured at one end to a crownsheet 4 and at their op osite ends to a tubesheet 5. The crown-s est 4 is preferably a continuation of the walls of the fire-box 2, while the up er tube-sheet 5 is secured to the boiler 1. he tube-sheet 5 is disposed in two planes, and that portion of the metal vertically disposed between the two planes of the tube-sheet is corrugated or bent substantially S-shape'd, as best shown at 6 in Fig. 1. The object in providing said tubesheet with the corrugations is to compensate for the expansion of the fines, so that when said fiues expand longitudinally that portion of the tube-sheet disposed between the two planes will yield and again assume its normal position when the flues are contracted. The flues 3 are inclosed in a shell 7, said shell being secured in position around said flues in any preferred manner, as by bolts 8 extending from said shell to the boiler 1. The shell 7 is of less length than the flues 3 and is provided with a flange 9 at its lower end, said flange being disposed in such a way that the water in circulating upwardly around the fire-pot will be directed around the flues 3, as indicated by arrows in Fig. 1. The upper end of the shell 7 is spaced a short distance below the tube-sheet 5, so that the water circulating upwardly around the flues will be carried to approximately the upper end of said flues before the same can escape into the boiler proper. A deflector-plate 10 is secured to the tube-sheet 5 and projects downwardly below the upper edge of the shell 7 and is greater in circumference than said shell, thereby providing a space for the escape of the water and steam. After the water and steam have passed downwardly through the space 11 they are separated; the steam rising and accumulating in the upper end of the boiler while the water is directed downwardly, as indicated by the arrows in Fig. 1, around the fire-box and thence up wardly into engagement with the flange 9 and into contact with the flues 3. At the intersection of the crown-sheet and shell of the fire-box the corners 12 are rounded to give greater space for the passage of the water between the flange 9 and the crownsheet 4. At the juncture of the crown-sheet 4 and the fire-box corrugations can also be provided, if desired, as shown in Fig. 3 of the drawings, thereby increasing the space between the crown-sheet and the flange 9, and also making said crown-sheet more resilient.

In boilers of this class, where forced draft is required, it has been a very difficult matter to carry the water to a sufficient height in the boiler to protect the upper portions of the fines, and when the water is not so conducted excessive expansion of the flues is the result, thereby springing the juncture between the flues and the crown and flue sheets and causing the same to leak. It will also be seen that the use of the upper portions of the flues as a heating-surface is lost. It has been the practice, therefore, to construct boilers of this class, especially those used for fire-engines, with very short flues, thereby diminishing the heatmg-surface to such an extent that it requires a very intense heat to generate sufficient steam.

It will now be seen that by using longer flues and providing means for conducting the water the full length thereof, as disclosed in my invention, the disadvantages heretofore encountered are obviated, and owing to the increased heating-surface steam can be generated very easily with but a small consumption of fuel.

What I claim is 1. In a boiler of the class described, the combination with an outer casing or boiler proper, vertically-disposed flues in said casing, a fire-box below said fines, a crown-sheet at the upper end of said fire-box and receiving the lower ends of said. lines, a tube-sheet at the upper ends of said flues disposed in two planes, the uniting portion of the metal between the two planes being substantially Sshaped to form corrugations; of a shell disposed around said flues, bolts extending inwardly from said casing and supporting said shell, a flange disposed at an obtuse angle around. the lower end of said shell and extending beyond the wall of the firebox,

said shell being of less length than said lines to form a space at each end thereof and a deflector-plate secured to said tube-sheet and extending around and below the upper end of said shell.

2. In a boiler of the class described, the combination with an outer casing; of a firebox surrounded by said outer casing, a crown-sheet over said fire-box, the wall of the fire-box at its juncture with the crownsheet being substantially S-shaped to form corrugations, a tube-sheet at the upper end of said casing, said tube-sheet being disposed in two planes and the metal disposed between the two planes of the tube-sheet being substantially S-shaped to form corrugations and tubes connecting said crown-sheet and tube-sheet.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

MILES CONNOR.

Witnesses:

J. STEWART, E. B. GREENLAND.

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