US832000A - Steam-boiler. - Google Patents

Description

PATENTED SEPT; 25, 1906,

0. H. SMITH.

STEAM BOILER.

APPLICATION FILED 1113.19, 1906.

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.PATENTED SEPT. 25, 1906.

C. H. SMTH.

STEAM BOILER.

APPLICATION FAILED PEB.19, 1906.

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POWER DEVELOPMENT COMPANY,

RATION OF- MAINE.

OF PORTLAND, MAINE, A CORPO- STEAM-BOILER.

Specification of Letters Patent.

Patented Sept. 25, 1906.

Application filed February 19, 1906. Serial No. 301,717.

To all whom it may concern:

Be it known that I, CLARENCE HILL SMITH, of Falmouth, in the county of Barnstable and State of Massachusetts, have invented certain new and useful Improvements in Steam-Boilers and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

This invention has reference to improvements in steam-boilers, and particularly to water-tube steam-boilers.

One object of the invention is to so construct a water-tube steam-boiler that'provision for increased water circulation is furnished without increase in height of the boiler.

Another object of the invention is to improve the construction of water-tube steamboilers having a lower rear drum with respect to the circulation of water from said drum.

Another object of the invention is to more completely utilize the products of combustion.

Another object of the invention is to more fully protect the water-circulating elements from the direct heat of the fire-box.

The invention consists in the peculiar arrangement of the water-circulating sections or elements.

The invention also consists in the peculiar system of directing the flowv of the products of combustion.

The invention also consists in such other novel features of construction and combination of parts as shall hereinafter be more fully described, and pointed out in the claims.

Figure l represents a side elevation of the improved boiler, partly in section. Fig. 2 represents a plan view of the sametaken on line2 2, Fig. 1.

Similar numbers of reference designate corresponding parts throughout.

As shown in the drawings in its preferred form, 5 represents the grate of a steam-boiler, 6 the front wall thereof, and 7 the top, the rear wall being of any well-known construction.

At the upper front is the transversedrum 8, and at the rear is located the transverse drum 9, these drums being connected by tubes 10 and 11. From the drum 9 extends a series of depending and inwardly-inclined tubes 12, .which are connected with inclined headers 13, from which extend forward the upwardly-inclined tubes 14, having their forward ends connected in the drum 8. The lower ends of the headers 13 are connected with similar inclined headers 1 5, which in turn are connected with the rear lower transverse drum 16 by short tubes 17 The headers 15 are connnected with the similarly -inclined headers 18 by the tubes 19, these headers 18 being connected with the drum 8 by the short tubes 20. In line with the headers 18 and connected therewith is a series of headers 21, which are connected by the series of tubes 22` with the rear lower drum 16. From the end portions of the rear lower drum 16 extends forward at each side of the fire-box a series of tubes 23 23, which communicate at their forward ends with the headers 24 24, these headers being connected by the bent tubes 25 25 with the end headers of the series 21, by means of which connection water circulating forward from the drum 18 through the tubes 23, may pass through the headers 24 24 andthe tubes 25 25 to the headers 21.

At the sides of the fire-box 5 are located the baffles 26 26, which protect the tubes 23 and their headers from the direct action of the heat. At the rear these baflies 26 26 are connected by the bridge-block 27, having the upwardly-extending deflector 28 for the protection of the rear drum 16 from the direct action of the heat.

Between the series of tubes 19 and 22 is located the inclined baflie 29, which directs the products of combustion passing from the firebox toward the rear of the boiler. When these products of combustion pass the endof this baffle 29, said gases circulate upward between the tubes 19 until they reach the baffle 30, located between the tubes 19 and 14, and are by this baflie directed forward. The gases then pass over the forward edge of this baffle 30 and rise between the tubes 14 and 11 until they reach the baffle 3 1 located between the tubes l0 and 11, and are directed toward the rear, in which passage they are directed downwardly by the inclined deector 32 which extends from the rear end of the bafl'le 31, and again circulate between the tubes 14 and finally pass out of the boiler through any suitable opening.

The transverse drums are preferably supplied with the usual inlets and outlets, as is well known in general practice inl the constructionA of boilers of this class.

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Water, preferably supplied to the drum 9, fills the several drums and the circulatingtubes to a suitable height, and when its temperature is raised by the heat from the gases passing from the fire-box circulates upwardly in the several series of inclined tubes toward the front of the boiler, -the water from the tubes 14 passing directly into the drum 8, while the water circulating;` forward from the series of tubes 19 and 22 passes through the headers 18 and 21, respectively, before entering said drum 8, the heated water and steam passing from this drum 8 to the drum 9 through the tubes 1() and11. As the water circulates downward from the drum 9 through the tubes 12 tothe headers 13 and 15 there is a natural tendency for it to circulate Jforward again through the tubes 14 and 19, and a large portion of the water passing through these headers 13 and 15 and entering the drum 16 circulates forward through the tubes 22 to the headers21 3 but to supply additional circulation forthe water from the drum l prefer to use the side circulation tubes 23 23, through which water from the drum 16 circulates forward at the sides of the fire-box and enters the headers 21 21 through the headers 24 24 and the curved tubes 25 25, thereby considerably increasing the circulation from the drum 16.

By the inclination of the headers 13, 15, 2O

' and 21 tubes of approximately they same length may be used, these tubes and their headers comprising a series of tubular sections closely arranged, whereby a large number of circulating elements are supplied without materially increasing the height of the boiler.

While I have herein shown and described a specific arrangement of water-circulating elements, I do not intend thereby to limit my invention as regards said circulating elements or as regards the method of directing the flow of the products of combustion by means of the various baiiies.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent- 1. A water-tube boiler comprising upper front and rear drums, tubes connecting said drums, a header below the rear drum and connected therewith, inclined tubes connecting said header with the front drum, a rear lower drum, headers connected respectively with the front upper drum and with the rear lower drum, the rear header of said pair communicating with the first-mentioned header, tubes connecting said pair of headers, inclined tubes extending forward from the lower drum, a front header in which said latter tubes are connected, and a connection between the front headers.

2. A water-tube boiler comprising upper front and rear drums, tubes connecting the same, a rear lower drum a header below the rear upper drum and connected therewith, tubes connecting said header and the front drum, intermediate headers connected respectively with the front drum and with the rear lower drum, the rear header of said pair communicating with the upper rear header, tubes connecting said intermediate headers, a front lower header communicating with the front intermediate header, tubes connecting said front lower header with the rear lower drum, tubes extending forward from the lower drum at the sides of the fireebox, a header in which the forward ends of said tubes are connected; and connections between the last-mentioned header and the front lower header, substantially as and for the purpose described.

3. Awater-tube boiler comprising a .front upper drum and a rear lower drum, a series of inclined tubes communicating with each of said drums and extending vin opposite directions, headers in which the ends of said tubes are connected, a series of inclined tubes, located between said drum-connected tubes, and furnished with he aders connected respectively with said drums and with the corresponding headers of the rst-mentioned series of tubes.

4. A water-tube boiler comprising an upper front drum and a rear lower drum, a series of tubes extending forward from the lower drum at each side of the fire-box, headers with which the forward ends of said tubes communicate and connections between said headers and the front drum. 4

5. A water-tube boiler comprising an upper front drum and a lower rear drum, a series of tubes extending forward from the latter drum above the fire-box, headers in which the forward ends of said tubes are connected, connections between said headers and the front drum, and means connected with said headers and the rear drum for circulating water at the sides of the fire-box.

6. A water-tube boiler comprising a firebox, baffles located at the sides of the 'firebox, a drum located at the rear of the firee box, tubes extending forward from said drum over the fire-box and furnished at theiry forward ends with headers, a baffle located above said tubes and extending in line there-i with, a series of tubes extending forward from said drum outside the side baffles of the fire-box and having headers connected with the front headers of the first-mentioned series of tubes, and a series of water-circulating elements located above the baffie of the first series of tubes and connected with the headers thereof and with said drum.

1n testimony whereof 1 affix my signature in presence of two witnesses.

- CLARENCE HILL SMITH.

Vitnesses:

HENRY J. MILLER, Primus TONER.

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