US567913A

US567913A - Vertical water-tube boiler

Info

Publication number: US567913A
Authority: US
Publication date: 1896-09-15
Anticipated expiration: 1913-09-15

Description

(No Model.)

MILLER. VERTICAL WATERIUBE BOILER. I I -No. 567,913. Patented Sept. 15, 1896.

w/r/mss; %%@2 W242 INVENTOR UNITED STAT PATENT FricE.

MATHIASrMILLER, OF AUBURN, INDIANA.

VERATICAL WATER-TUBE BOILER.

SPECIFICATION forming part of Letters Patent No. 567,913, dated September 15, 1896.

Application filed May 28, 1896. Serial No. 593,384. (No model.)

To all whom it may concern-.-

Be it known that I, MA'rHIAs MILLER, a citi to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in vertical water-tube boilers designed to utilize the waste heat from furnaces and by presenting an extended heating-surface in contact with the water to quickly and economically generate steam. s

The object of my invention is also to pro vide a steam-generator for marine and stationary engines having a large area of heat ing-surface, and which can be placed in a plant without the necessity of building brick arches or to incase the boiler with brick.

A further object is to arrange the watertubes in connection with an inner waterdrum to secure the best circulation of heat within the boiler. a

i I accomplish these objects by the device described in the following specification, and illustrated by the accompanying drawings, in which I Figure l is a view in vertical section of the boiler embodying my invention. Fig. 2 is a transverse sectional view ofFig. 1 through the line a: w, and Fig. 3 is a transverse sectional view through the line N N.

Similar figures refer to similar parts in the several views. a

The small numeral 1 represents the outer shell of the boiler, cylindrical in form and resting upon a brick foundation 31 and having a crown-shell 18.

2 is an inner shell concentric with the outer shell 1.

Both the outer and inner shell have a cir cular central opening at the bottom, inclosed by the cylindrical casing 32, which is united to the base 25 of the outer shell at the bottom and to the base 33 of the inner shell at the top, thus practically forming a part of the boiler and a support for the inner shell, with a water-space .3 between the two. bottoms, which communicates with and forms an exten- 5 5 sion of the water-space 3 between the sides of the two shells.

The tops or crowns of both the inner and outer shells have central circular openings for a smoke-flue 17, which is united at its base to the crown 30 of the inner shell, and at its top to the crown 18 of the outer shell, thus affording a draft-opening from the interior for the escape of the smoke.

Above the ash-pit 8 at the base of the boiler are the fire-grates 6 and the firebox 7.

9 is a cylindrical inner drum suspended midway between the top and bottom of the boiler, having a bottom 10, a crown 1 1, and vertical sides 21. 7o

28 is a ring or sleeve which is riveted to the drum 9 and the wall of the shell 2 and open in its center and thereby giving a free communication between the water-space 3 and the interior of the drum 9. w

Secured to the bottom 33 of the shell 2 in concentric rows around the fire-grates are the water-tubes 12, which are preferably inclined inwardly at their upper ends, where they are united to the bottom 10 of the drum 9. These tubes communicate at their lower ends with the water-space 3 and at their upper ends with the interior of the drum 9. Above this drum are also a plurality of concentric rows of water-tubes12, secured at their lower ends to the crown 11 and preferably inclining outwardly, also secured at their upper ends in the crown 30, and thus communicate with the interior of the drum 9 and the water-space above the crown 30.

The drum 9 is less in diameter than the inner diameter of the shell 2, thus leaving a space between their walls for the ascent of the heat from the fire below the drum to the spaces 29 above the same and having the draft-exit through the flue 17.

Above the crown of the drum 9 a circular angle-iron 24 is secured to the inner wall of the shell 2 to deflect the heat as it rises around the exterior of the drum toward the center of the inner space of the boiler. This erable.

boiler opposite the opening through the ring 28, Which has a manhole door or plate 34, secured in the outer shell by the ordinary bridge and bolt, so as to make it water-tight. Through the opening 20 and the coincident opening through the ring 28 a free access is afforded to the interior of the drum 9 for the purpose of cleaning and repairing the said drum when the water is drawn from the boiler.

22 is a blow-off pipe communicating with the bottom of the drum 9 and projecting at its outer end through a sleeve 35. to the outside of the boiler. The sleeve 35 is secured to the outer and inner shells of the boiler so as to be water-tight.

2 3 is an ordinary fire-door mounted within the, solid ring 27, which ring is also secured to the outer and inner shells. Bythis means access is given to the fire-box and there is free communication between the water-space below and above the fire-door around the eX- terior of the ring 27.

13 is a metallic cone suspended centrallyin the shell 2 by a rod or chain 14 from the lever 15,, pivoted upon the standard 16. This. cone divides the heated air in its ascent, and it is thus diffused among the upper tubes l2, and by raising it against the base of the flue 17 or lowering it it regulates the draft.

l9 a manhole, in the crown 18, secured by a manhole-plate in the usual manner.

29 and 29, are hot-air spaces in the interior of the inner shell.

26 is wash-out plug at the base of the boiler and there can be any-number of them placed at different points in the outer circumference.

The dotted line 5 indicates the height of the water above the top of the crown 30, which of course can be varied, and 4 is the steamspace above the water-line.

'By this construction it will be perceived that the water fills the entire space between the outer and inner shells up to and covering the top of the inner shell and also fills the upper and lower series of tubes 12 and the drum 9.

In very large boilers central draft-tubes may also be made through the drum 9 for the heated air to ascend from the fire to the airspace above the drum.

By this device a very equal distribution of the heat is secured and the hot air surrounds the water-tubes and the drum as well as givfi ing a heating-surface to the whole of the inner shell. No. brick walls or casingare necessary for inclosing the boiler. The fire-grate surface may be quite small and a great saving of fuel effected. The boiler can be made ready for use in the shop before shipping and can be set for use by any ordinary mechanic.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is-T 1. In a vertical water-tube boiler the combination of an external and an inner shell having a water-space between the shells at the bottom, sides, and top, and having a central circular opening at the base for an ashpit, a fire-box above the ash-pit, a central circular water-drum suspended midway between the base and the top of the inner shell of less diameter than the interior diameter of the inner shell, a plurality of concentric rows of water-tubes communicating with the waterspace beneath the bottom plate of the inner shell and the interior of the said water-drum and supporting said drum, a plurality of concentric rows of water-tubes connected at their lower ends with the crown of the said waterdrum and at their upper ends with the crown of the said inner shell thereby forming a water communication between the water=space in the interior of said drum and the space above the crown of the inner shell, a central vertical flue connected with and opening through the crown-sheets of both the outer and inner shells into the heat-chamber in the interior of the boiler and an inverted conical damper adapted to close said flue with means for regulating said damper all arranged as shown and described.

2. In a vertical water-tube boiler, the com bination of an external cylindrical shell and an inner concentric cylindrical shell having a water-space between them, a fire-box in the interior of the, base of said boiler, with means to feed fuel into said fire-box through an open ing in said shells, a central circular waterdrum suspended midway between the base and the top of the said inner shell and having a less diameter than the said inner shell and having communication by water-tubes between thewater-space, at the lowerpart of the inner shell and the interior of said drum, a plurality of water tubes connecting at their lower ends with the said water-drum, and at their upper ends with the water-space between the outer and inner shells, a central vertical flue com municating with the hot-air space of the inner shell,.a draft-damper adapted to regulate the draft and diiiuse the heat in the said airchamber, a steam-chest. above the water-lines in said boiler, and means for communicating with said steam-chest, and also means for communicating with said inner drum from the exterior all arranged as shown and de, scribed and for the purpose stated.

3. In a vertical water-tube, boiler, the combination of an outer shell, an inner concentric shell so .arranged as to leave a water-space between it and the outer shell, a smoke-flue and draft-damper as shown, a centrally-arranged inner water-drum suspended as shown and connecting with said waterspace by a series of fixed water+tubes arranged as described and the said inner drum being provided with a suitable opening coin, cident with an adjacent manhole, thereby affording access from the exterior to the interior of said inner drum for cleaning and repairs, all substantially as. described and shown and for the purpose stated.

at. In a vertical Water-tube boiler an inner terior to the interior of said drum for clean- 10 heating-drum centrally fixed in an inner heating and repairs. ing or furnace shell and communicating With Dated at Fort Wayne, Indiana, this 25th the Water-spaces surrounding said shell by a day of May, 1896. 1 series of fixed Water-tubes constructed and arranged as described, the said drum being provided with a suitable opening coincident Witnesses: with an adjacent manhole of the heating- ALBERT L. BOND, shell, thereby aflording access from the eX- HENRY J. MILLER.

MATI-IIAS MILLER.