US1200905A - Hot-water and steam boiler. - Google Patents

Description

F. 1. WALLING.

' HOT WATER AND STEAM BOILER.

APPLICATION men ozc. I6. 1913.

Patented 0ct.10,1916.

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HOT WATER AND STEAM BOILER. APrLlcAn-ou H LED 0mm. 1913.

' Patented Oct 10, 1916..

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FREDERICK J. WALLING, OF MINNEAPOLIS, MINNESOTA.

HOT-WATER AND STEAM BOILER.

Application filed December 16, 1913.

To (ZZZ whom it may concern:

Be it known that I, FREDERICK J. VALL- ING, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in HotlVater and 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 has for its object to provide an improved hot water and steam boiler, especially adapted for use in heating plants; and to such ends, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters 111C11- cate like parts throughout the several vlews.

Referring to the drawings: Figure 1 1s a view partly in side elevation and partly in vertical section showing a boiler designed in accordance with my invention; Fig. 2 IS a horizontal section taken on the irregular line of 00 on Fig. 1; Fig. 3 is a horizontal section taken on the line 00 m on Fig. 1; and Fig. 1 is a transverse section taken approximately on the line 00 02 on Fig. 1.

The main boiler shell 1, which 1s preferably of novel construction disclosed and claimed in my prior Patent 1,058,208, dated April 8th, 1913, is in the form of a hollow cast shell, resting upon a hollow cast base 2 having at its front the ordinary ash pit door 3. The hollow main shell 1, has an upright water chamber of annular form, but which 1s extended over the top of the fire pot chamber 1. In front, it is provided with a fuel door 5 and with a cleanout door 6. At a point very much eccentric to the vertical axis of the said main shell 1, the top structure there-' of is integrally formed with closely positioned, but circumferentiall yspaced draft or flame passages 7 (see particularly Fig. 2). Attention is here called to the fact that in Fig. l, the section line does not follow a true central plane, but deviates sufliciently to intersect the draft passages 7 and certain other passages shown in said Fig. 2, and hereinafter described. In Fig. 1, the numeral 8 indicates one of the several so-called water columns that extend inward from the annular water column of the main shell 1,

I Specification of Letters Patent.

Patented Oct. 10, 1916.

SerialNo. 807,048.

as fully disclosed and claimed in my said prior patent.

The numeral 9 indicates a cold water return pipe which opens into the annular water chamber of the shell 1, near the bottom thereof. Usually, there will be two of these cold water return pipes located, one on each side of the shell.

My present invention is directed chiefly to the provision of an improved super-structure for the main boiler shell, whereby very greatly increased heating efliciency is obtained, particularly by an improved arrangement of the water circulating passages in the said super-structure, and in the relative: arrangements of the heatlng surfaces. This super-structure is made in sections capable of being built up on the unit system to increase the heating capacity of the boi er, and also, to facilitate construction and erection. The super-structure, as shown, comprises a top section 10, and an intermediate section 11, the main boiler shell 1 being treated as the lower or bottom section of the boiler. The intermediate section 11 has an annular water chamber 12 and two horizontal water chambers 13 and 14. The water chambers 13 and 1% are in communication with the annular water chamber 12, the former, at a point considerably above the bottom thereof, and the latter at the extreme upper portion of the said chamber 12. Between the water chambers 13 and 1 1, there is formed a draft passage 15 which circumferentially follows the entire wall of the water chamber 12. A similar draft passage 16 is formed between the raised bottom of the chamber 13 and the top of the main shell 1. The draft passage or chamber 13 has an axially located independent hub 17 that is connected to the central portion of the horizontal top water chamber of the main shell 1, as shown, by

vide for circulation of water through the lower portion, as well as through the upper portion of the annular water chamber 12, I form the lower wall of the said water chamber 13 with a depending trough 21, preferably of V-shape, and which extends from the bottom of the said water chamber 13 to the bottom of the'hub 17. This trough 21 is located vertically over a line drawn mid way between the draft passages 7 in the top of the main shell 1, so that the flames passing upward through two passages 7, will be delivered on opposite sides of the said trough 21 and directly against the flat undersurface of the water chamber 13.

The intermediate section 11 rests directly upon the outer edge portion of the top of the main shell 1, and fits the same with a tight joint at Likewise, the upper section 10 rests directly upon the outer top portion of the section 11 and fits the same with a tight joint at 23. The top wall of the section 11 is connected by a thimble 2i, to an axially located depending hub 25 ofthe said upper section 10. A draft passage or flame chamber 26 is formed between the top of the section 11 and the bottom of the section 10, and the bottom plate or the said section 10 is formed with a radially extended depending trough 27, preferably of V-shape cross section and which is located vertically over a line drawn midway between the flame passages 20, so that the flames passing upward through said passage 20 will strike the raised bottom of the said section 10 on opposite sides thereof. The said section 10 is formed with three horizontally extended chambers 28, 29 and 30. The said chamber 29, which is a draft passage, is connected to the chamber 26 through vertical draft passages 31, the walls of which are cast integral with the section 10. These passages 31 are located very much eccentric to the axis of the boiler and to the thimble 20. At its rear, the said draft passage 29 is connected to a smoke outlet pipe 32, shown as cast integral with the section 10 and provided with an ordinary check damper 38. As clearly shown in Fig. at, the water chambers 26, 2S and 30 are in communication with each other. Hot water distributing pipes 3- lead from the top of the chamber 30.

The chambers or draft passages 15 and 16 have cleanout openings 15 and 16 respectively, at the front of the boiler that normally close by an ordinary door 35 hinged to a door frame 36, secured to the section 11. Likewise, the chambers or draft passages 26 and 29 have cleanout openings 26" and 29, respectively, at the front of the boiler, and which are normally closed by an ordinary door 37 hinged to a door frame 38, secured to the front of the section 10..

Qperation: Assuming that the main shell 1 has the water legs 8 projecting into the fire pot, as disclosed in my said prior patent, it is obvious that this boiler will have all of the advantagesof the boilerdisclosed in my said prior patent. It will, however, have the'following additional advantages, to wit, the flames or intensely hot products of combustion passing out of the fire pot, will be brought over and over again, into direct contact with the heating surface of the so-called superstructure, and are caused to take a zigzag course on their upward passage until they reach the smoke pipe 32. Two vertically adjacent draft passages are located vertically, one over the other, and hence, when the flames or hot products of combustion pass upward through one of the ports 7, 19, 20 or 31, they come directly into contact with an overlying horizontal undersurface of a water containing chamber. The

waterpassing upward through the several sections of the super-structure, is caused to take a zigzag or winding course, progressing toward the top of the boiler very much on the same plan as do the flames or hot products of combustion. Otherwise stated, the water and the hot products of combustion, both move upwardly on zigzag courses and repeatedly spread out through horizontally expanded chambers, the water being all the time subject to the heat from the other products of combustion until they reach the very top of the boiler.

In my improved arrangement the draft passages, as well as the water passages, are reversely or alternately offset, all of the flames or hot products of combustion are caused to pass vertically through the vertical draft passages and horizontally through all of the horizontally extended draft passages or chamber without possibility of any of the flames of the products of combustion taking a short or direct course to the smoke pipe.

As is well known, water circulation is essential to eliicient operation of a boiler. The rapidity of the transfer of heat by convection, depends upon the rapidity of circulation, and the circulation is made more rapid and efficient by compelling the flames or hot products of combustion and the water, both to follow similar extended zigzag courses that are definite and positive in their path. The water circulating channels or troughs in the bottoms of the horizontal water chambers of the sections, prevent the formation of pockets in which water will not circulate, and thus render efficient the entire water and heat conducting surfaces of the boiler. Also the said channels permit the depending marginal portions of the water chambers to be drained. This latter feature is very important and prevents breaking of the boiler by freezing when out of use in cold climates. Also it gives circulation which prevents accumulation of Cir sediment; or, if some sediment should accumulate, affords means for removing the same by flushing the boiler.

What I claim is:

1. In a hot water or steam boiler, the combination with a main shell including a fire pot, of a super-structure therefor, including a water conduit and draft passage, having vertically spaced alternated horizontally expanded chambers, and said water conduit also having an annular marginal water chamber extended below the horizontally expanded water chamber with which they directly communicate, the adjacent horizontally expanded water chambers being in communication through axial passages, and the horizontally expanded chambers of said flame passage being connected by vertical passages that are offset alternately on opposite sides of the axis of the boiler.

2. In a hot water or steam boiler, the combination with a main shell including a fire pot, of a super-structure therefor, including a water conduit and draft passage, having vertically spaced alternated horizontally expanded chambers, and the former also having annular marginal water chambers extended below the horizontally expanded water chambers with which they directly communicate, the adjacent horizontally expanded water chambers being in communication through axial passages, including hubs and connecting thimbles, and the said horizontally expanded chambers of said water conduit also having independent radial channels connecting the depending hubs to the depending portions of the an- Goplel of thin patent may be obtained for nular marginal chambers, and the horizontally expanded chambers of said draft passage being connected by vertical passages that are alternately offset on opposite sides of the axis of said boiler, and certain 'of which are arranged, one on each side of the overlying adjacent radial water channel.

3. In a hot water or steam boiler, the combination with a main shell having a water chamber that surrounds and extends over the top thereof, of a super-structure therefor, having alternated zigzag water and draft passages, the former including horizontally expanded water chambers with depending axial portions and with marginal water chambers depending below the same and also having radial channels connecting with the said depending axial portions, and the lower portions of said vertically extended marginal portions, the said water .passage being 'in communication with the water chamber of said main shell, substantially as described.

4. In a hot water or steam boiler, the combination with a shell having a horizontal water chamber extended therefrom, with a depending marginal portion and a depending axial portion, and also having a radial channel connecting the said depending marginal portion with the said depending axial portion.

In testimony whereof I aflix my signature in presence of two witnesses.

EDITH S. HOLLOWAY, F. D. MERCHANT.

five cents each, by addressing the "Commissioner of Patents, Washington, D. G."

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