US519015A - Boiler - Google Patents

Description

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W. H; BERRY. BOILER.

No. 519,015. Patented May 1, 1894.

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.No. 519,015. Patented May 1,1894.

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NiTnD STATES WILLIAM H..-BERRY,1OF EDDYSTONE, PENNSYLVANIA.

BOILER.

SPECIFICATION forming part of Letters Patent No. 519,015, dated May 1, 1894. Application filed May 21, 1890. Renewed October 2, 1893. Serial ITO-487,033. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM H. BERRY, of

' Eddystone, in the countyof Delaware and State of Pennsylvania,have'invented certain new and useful Improvements in Boilers, of which the following is'a specification, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon.

My invention consists, broadly, in providing a boiler with a revoluble casing or shell having a door extending nearly the whole length thereof, whereby eachpart of the boiler inclosed by the shell is easily exposed and reached for inspection, cleaning and repair. The revoluble shell is provided for the greater part of its length with an inner lining of non-combustible and non-conducting material, such as a mixture of asbestus and magnesia, which lining serves asan insulator to prevent radiation'ot' heat from the boiler.

My invention consists further in several details of construction and arrangement of the several parts of the boiler, whereby horizontal surfaces inviting deposit of sediment and inaccessible for cleaning are avoided; unequal expansion, due to irregular heating, is largely avoided, and where expansion is unavoidable, (as between the inner and outer shells) opportunity for perfect compensation is given. The tubes connecting the inner and outer shells of the boiler are not radial, but are so arranged that the tubes forming one vertical row on the inner shell, willform two vertical rows on the outer shell, this being very essential in order to maintain the strength of the outer shell which is subjected to an expansive strain.

My invention will be fullyset forth in the following specification, and particularly pointed out in the claims.

In the drawings-Figure 1 is an elevation of my improved boiler. Fig. 2 is a vertical, and-Fig. 3, a horizontal section. Figs. 4:, 5 and 6 are detached details. Fig. 7 is an elevation, partly broken away, showing some details of my invention.

Similar letters and numerals of reference indicate similar parts in the respective fig- 5o ures.

The boiler consists of an'outer shell A and an inner shell Bunited at the top by an annular ring C which is crowned so as to resist pressure Without bracing, and is thus adapted 5 5 to accommodate the unequal expansion of the inner and outer shells. The annular ring I) unites the bottom ends of the two shells and is inclined so as to facilitate the deposit of sediment at its outer and lower edge, which is protected from the fire and where blow cocks are provided for its frequent removal. The cone or crown sheet D is braced to resist pressure and its conical shape holds it rigid so that the working of expansion will always occur at the top. The inner shell B is made in sections flanged and united as shown at B, thus forming a recess in which the arched circular head B is fitted for the I purpose of directing the draft. I shall, in some cases, use two such heads; in which event the shell B will be made in three sections. The head B is made of fire clay or other incombustible material, and formed in five pieces, 1, 2, 3, 4 and 5; 1 and 2 are put in first, then 3 and 4, and finally, 5,-which holds the rest in place. The shells A and B are perforated to receive the tubes a, a, which are horizontal, and expanded into the shells in the usual manner. These tubes are not arranged radially, but the tubes forming a vertical row on the inner shell B will form two vertical rows on the outer shell A, this beingaccomplished by deflecting the tubes alternately to the right and left of the radial line. The object of this arrangement is to maintain the tensile strength of the shell A which is subject to an expansive strain; it being obvious that tensile strength is not as essential to the shell B on which the strain is one of compression. At the top of the boiler, an iron head 13 is fitted upon the in nor shell B and madeto support the weight of the stack. The head B is provided with a door 13, through which access may be had to the inner shell.

Secured to andencircling' the outer shell A, at a point below the lowest line of tubes,is a

of the gases from the furnace.

shelf A, so constructed that its outer edge turns up and forms a continuous track A upon which a series of flanged rollers E is supported. The rollers E run on journals E secured to a jacket or casing E which surrounds the outer shell at a suificient distance therefrom to allow ample area in the annular space a inclosed for the free circulation The jacket E is thus supported solely by the track A through the medium of the rollers E, and is adapted to be revolved so as to bring the door E which extends from near the top to near the bottom of the jacket, opposite to any part of the outer shell A. The lower edge of the jacket E extends below the track A to a point near the bottom of the space made by the shelf A, track A and the side of the shell A; and by filling this space with sand, asealed joint is made allowing the jacket to revolve while preventing the entrance of air.

Secured to the shell A at a point slightly below the water line, is another shelf A similar to A but smaller, which also encircles the shell A, and in which sand is carried for the purpose of sealing the connection between the shell and the jacket at this point, by means of the inverted shelf E secured to the jacket as shown. Attached to the inner side of the jacket E, at its top edge, is a shelf E also filled with sand for the purpose of making a similar connection with a fixed hood F by means of the projection F. The result of this arrangement is that the gases pass from the furnace to the lower section of the inner shell B, thence out through the lower section of tubes at; then up through the annular space a and in through the middle section of tubes; then up and out through the upper section of tubes; and lastly up and over the top of the annular crowned ring 0, to the chimney A Secured to the lower edge of the jacket E, and extending inwardly and entirely around it, is a shelf E which supports a lining E of firebrick, asbestus, or other incombustible nonconductor. The lining E is made in sections, and held in place bya series of I-posts E which resting upon the shelf E, extend to the top of the jacket. The posts E are secured to the jacket by bolts having ferrules or distance pieces E upon them, so that when the sections of lining are slipped down between them, there will remain an air space between the lining and the jacket. This lining serves as an insulator and prevents radiation of heat from the boiler.

Attached to, and extending from the top to the bottom of the jacket, and adapted to revolve with it, is a pipe G provided with nozzles G so arranged that one nozzle shall stand opposite each tube a in two vertical rows in the outer shell A, so that as the jacket is revolved, a nozzle will be presented to every tube. A flexible connection G2 is made from the live steam to the pipe G, and by turning on the steam and revolving the jacket, the entire boiler maybe blown clean of soot while in service.

From the foregoing description it is obvious that the tubes can be cleaned out at any time without stopping the operation of the boiler. It is also obvious that when the boiler is not in use, by opening the door in the outer casing or jacket and revolving the latter, the portion of the boiler inclosed by the casing can be easily inspected and all repairs made without removing any portion of the casing, as would be necessary were the latter stationary.

In the drawings I have illustrated a peculiar construction of furnace, and a traveling grate. I do not, however, describe these features herein as theyform no part of the present invention, and will form the subject-matter of another application.

Having described my invention, I claim- 1. In a boiler, inner and outer shells and rows of horizontal fire tubes uniting said shells, combined with an annular crowned ring joining said shells at their upper ends and a conical crown sheet joining their lower ends, substantially as specified.

2. The combination with a sectional inner shell having a recess formed by a joint between two sections, of a bulkhead or draft check fitting in said recess, substantially as described.

3. The draft check constructed in sections to admit of its adjustment in the recess in the flue, substantially as described.

4. The combination in aboiler of inner and outer shells, rows of horizontal fire tubes uniting said shells, a revoluble casing surrounding the outer shell, and a series of blast nozzles carried by the revoluble casing and adapted to register with the fire tubes, substantially as specified.

5. In a boiler, a draft check consisting of a sand pocket and a blade or plate suspended therein, free to move, while resisting the passage of air, substantially as described.

6. The combination in a boiler of an outer casing, a series of I-posts secured to said casing, and an incombustible non-conducting lining made in sections and held between the flanges and webs of the I-posts, substantially as set forth.

7. The combination with a boiler and an outer casing, of a series of I-posts, distance pieces between the I-posts and the outer oasing, bolts to secure the casing, posts and distance pieces together, and an incombustible non-conducting lining made in sections and supported by the I-posts; an air space being left between the lining and the casing, substantially as specified.

8. In a boiler, the combination with an in nor and an outer shell, of aseries of fire tubes connecting the twoshells, the tubes being attached to the shells in vertical rows, one conical crown sheet, and an outer casing,sub vertical row of. tubes'on the inner shell makstantially as set forth. 1o ing two vertical rows on the outer shell, sub- In testimony whereof I' have hereunto set stantially as and for the purpose specified; my hand and seal this 3d day of April, 1890.

9. In a boiler, inner and outer shells and WM. H. BERRY. [L. s.] rows. of horizontal fire tubes uniting said Witnesses: shells, combined with an annular crowned E. CRUSE, ring joining the shells at their upper ends, a PHILIP MAURO.

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