US653216A - Water-tube boiler. - Google Patents

Description

No. 653,2l6. Patented July to, I900. c. B. cowuzve. H. c. coon-m- WATEB TUBE BOILER.

(Application mefi M 21, 1899.)

(No Nodal.)

THE Noam: PETERS cc, Pnm'uuma, vusnmcmmp. c.

NlTED STATES PATENT OFFICE.

CHARLES R. COWLEY, OF EVERETT, MASSACHUSETTS, AND HOWELL O. COOPER, OF OIL CITY, PENNSYLVANIA.

WATER-TU BE BOILER.

SPECIFICATION forming part of Letters iEatent l\l'oe 653,216, dated July 10, 1900.

Appfication filed August 21, 1899 To all whom it may concern:

Be it known that we, CHARLES R. COWLEY, residing at Everett,county of Middlesex, State of Massachusetts, and HOWELL O. COOPER, residing at Oil City, county of Vena'ngo, and State of Pennsylvania, have invented an Improvement in Water-Tube Steam-Boilers, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

The object of our invention is to produce a boiler combining the desirable featuresof the water-tube type with the desirable features of the fire-tube type-4. 6., large heatin g-surfaces compactly arranged, with an adequate proportion of contained water, and having all parts readily accessible for inspection, cleaning, and repairs.

Since the water side of the heating-surfaces immediately in'contact with the flame furnish the highest evaporative efficiency, and therefore when using salt or impure water become coated with deposit most rapidly, it is imperative that such surfaces be so disposed as to be easily cleaned. In order that this may be secured, together with the proper proportion of water to carry off such heat as rapidly as necessary, we have supplied two sets of heating-surfaces-that furnished by large watertubes and that furnished by smaller fire-tubes. To make the fire-tubes accessible, it is necessary to so arrange the draft that they may when desired be freed from the hot gases to allow of their being cleaned, plugged, &c., without entirely shutting down the boiler.

Our invention consists in, first, the insertion of oneor more fire-tubes or clusters of fire-tubes into a large water-tube, forming therewith a complete unit, in such a manner that said fire-tubes or clusters of fire-tubes may be readily removed; second, a packing gland arrangedto adjust a packing in the joint formed by the cluster of fire-tubes head and the Water-tube head, said gland adjusted by protected bolts, and, third, the combination of one or more water-tubes, with their removably-inserted fire tubes, with a steam-drum and a water or mud drum, the whole placed over a grate in such position that the water tubes receive the hottest gases, which may Serial No. 728,001. (No model.)

be released into the uptake or passed at a lower temperature through the inserted firetubes, as desired.

In the drawings, Figure 1 represents the front elevation of a boiler constructed in accordance with our improvements. Fig. 2 is a side elevation of the same, showing a section through one water-tube, its inserted firetubes, heads, stuffing-box glands, and adj usting-bolts, and also showing steam and mud or water drum, casing, grate-bars, uptake, and draft apparatus.

In our method of construction, as shown, the water-tubes D are set inclined from the horizontal, with their ends connected to cast or forged headers B and O. The upper ends of said headers are connected to a steamdrum A by the tubes F, and the lower ends of the headers G are connected to a mud-drum K by the tubes L.

The tube-heads E and E, into which are secured the fire-tubes M, forming therewith a cluster, are shown as arranged so that the entire cluster, with its attached heads, may be withdrawn from the water-tubes for inspection, cleaning, &c. The water-tubes D being of large diameter readily allow of inspection, cleaning, 85c. The tube-heads E and E are made to fit the corresponding outer openingsV and W of the headers B and O and are made tight therein by rings of packing G, said rings being held in place by the gland I, adjustable by means of bolts .I, the outer ends of said bolts being protected from the hot flames by the cap-nuts N. The diameters of the heads E and E being equal, there is no tendency for the cluster, with its attached heads, to change its relative position with respect to the water-tube D. Stops O are, however, provided on one end to hold said cluster of fire-tubes firmly in place.

Any set of fire-tubes, with its attached heads, may be readily withdrawn without disturbing any other set. A secondary passageway Q is provided for the gases to go directly into the uptake S instead of through the firetubes M, if desired, said passage-way being closed by the door P, arranged to open and close as required.

It is not intended to limit the invention to the specific construction shown and described,

moved and replaced, substantially as and for the purpose described.

2. The combination with a water tube or shell; of removable fire-tube heads therefor,

the said heads being about the same in diameter as that of theshell; and a cluster of fire-tubes extending from one of the said heads to the other whereby the entire cluster of fire-tubes may be removed at once to render the interior of the shell accessible, as set forth.

3. The combination with a removable firetube head, of a water-shell head, and adjustable packing-glands and adjusting-screws with protected ends, substantially as and for the purpose described.

4. The combination with a fire-tube boiler, of a supplementary normally-closed draftpassage leading from the top of the boiler directly into the uptake and adapted when opened to afford a direct passage for the draft whereby the fire-tubes are freed from the hot gases and may be inspected, plugged, &c., without shutting down the boiler, substantially as shown and described.

5. The combination of a number of water tubes or shells each containing one or more fire-tubes arranged in such a manner that the hot gases of combustion impinge first upon said water tubes or shells and becoming somewhat cooled are thence passed through the fire-tubes and finally out into the smoke-box at a low temperature and means whereby said tubes may be readily removed and replaced to afford access to the interior of said watershells, substantially as shown and described.

6. In a boiler, the combination with a water tube or shell; of removable heads for the ends of said shell; a cluster of fire-tubes extending from one of the said heads to the other whereby said heads and fire-tubes may be removed to afford access to the interior of the shell; and packing devices for said heads, substantially as described.

7. The combination with water tubes or shells, of connecting-headers fastened thereto and provided with openings opposite the ends of said Water tubes or shells for the insertion of removable fire-tube heads; and a cluster of fire-tubes extending through each of said shells from one of said heads to the corresponding opposite head, the said tubes being connected with said heads, whereby each cluster of fire-tubes and its attached heads may be removed, leaving the interior of the shells accessible, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

CHARLES R. COWLEY. HOWELL O. COOPER. -Witnesses:

HENRY J. LIVERMORE, J AS. J. MALoNEY.

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