US698323A - Water-tube boiler. - Google Patents

Description

Patented Apr.`22, |902.' l E. G. RUST. wATl-: TusEBoILEn'.

(Appuevltion med N ov. 14 1901.)

* 2 Sheets-Sheet VI.

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Patented Apr. 22, 1902.

(Applietion med Nov. 14, 1901.;

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UNITED STATES y PATENT OEEIOE.

' EDWIN GRAY RUST, OE PUEBLO, COLORADO.

WATER-TUBE B'OILER.

SPECIFICATION forniing pari; 0f LetterSPatent No. 698,323, dated April 22, 1902.

Application led November 14, 1901. Serial No. 82,211. (No model.) v I To a/ZZ whom it nfl/wy concern:

Beit known that I, EDWIN GRAY RUsT,a citizen of the United States,'residing in Pueblo,

VColorado, have invented certain Improvements in W ater-Tube Boilers, of which the followingis a specification'.

My invention relates to certain improvements in steam-boilers having for its object through the drums and furnace of my improved boiler; and Fig. 2 is a vertical sectional .view taken on the line 2 2, Fig. 1.

In the above drawings, A is the boiler set- I ting or casing, usually of brick, and supported 1n the present instance on concrete foun dations a.. This casing projects in front of the boiler proper to form the furnace B, this latter, together with the whole interior surface of the casing, being provided with a refractory lining a. The grate is represented at b, and at its inner end is the bridge-Wall b.

Carried on any suitable framework around which the casing or setting is built are two drums C, and above these, at the top of the casing, are two Others C' of similar construction, while Water-tubes c, preferably all of the same length, extend between and connect the two pairs Of drums, respectively.;

The tube-sheets of these drums are preferably of the construction set forth in my application for patent- No. 81,420, tiled November 7, 1901, each sheetbeing pressed out, so as to form a number of plane surfaces c2, into each of which enter a series of the tubes o,

' each series consisting of four in the present are two sets ofsteam-pipes c5, connecting said upper drums. Upon awall of suitable rel fractory material vextending between and a smaller drum D, while directly above this latter'is'a drum D', carried by the frame- C. The tube-sheets ,of these smaller drums drums C and C', and they, like the larger of vertical tubes d. Each of the above Aseries consists of two tubesspaced in the present instance about three inches apart, the space so formed beingl filled witha refracthe boiler-casing andl from the drum D to the drum D.

of tubes CZ to the drum C farthest fromthe furnace B, while two series of tubes cl2 and d3 extend from rthe upper portion of the drum Dl to both of the'drums C', the tubes of each series alternating with each other. These Vtwo drums D and D', with the refractory partition E between them, serve as a baflie-wa'll to direct the products of combustion from the furnace, so as to secure most efficient action,

on hollow girders and channels e and e', re# speotively,` extending downwardly vfrom the top ofthe boiler-casing just back of the rear drum C and its tubes. The connection F to the stack is made between this latter drum and the' rear wall ofthe casing.

water-column g, and, besides the fire and ash doors a3 and a4, there area number of doors In operation'the hot gases from the furnace pass out'between the first set of tubes c, and after striking theftubes dk on the front face of the baffle-wall E rise through the space between said wall and the-front of the casing A, finally striking the bottoms of the upper vdrums C and passing between theftubes d2 and d3. From here the gases are directed down around the rear set of tubesc, between and around the drum D', with its back s'et of tubes d and the rear baffle-wall E'. Passing back between the rearset of tubes c, they somewhat above the two drums C is mounted` work of the boiler at a level below the drums are of a construction similar to that of the pairs of drn ms, also are connected by a series tory wall or partition E, which extends across 'The lower drum D is connectedby a series l a5 in thebrick casing provided for thepurpose of facilitating inspection and cleaning. y

there being a second baffle-'wall E', carried The boiler is provided with the customaryl i IOO iinally rise between the wall E and the back wall of the casing to the stack F. Such a course of the products of combustion will give rise to a circulation of water in the boiler, as indicated by the arrows. Thus from Fig. l it will be seen that the water will rise through the front set of tubes c, and after entering the first drum C will pass through to the tubes Z2 into the drum D and down through the tubes CZ into the drum D. From here it flows through the tubes d into the rear drum C and rises through the rear tubes c to the rear drum C.

It will be noted that by the construction shown I am enabled to effectively utilize the space for heating-surface in which it was formerly customary to place a baille-wall, at the same time employing the tubes in said space to support a relatively thin and light partition. In this manner I very materially increase the available heating-surface of the boiler withoutoccupying any more space than is ordinarily taken by a boiler of m uch smaller capacity. By the use of the peculiar construction of tube-sheets I am enabled to use straight tubes all of the same length between each pair of drums, by this means reducing the cost of manufacture and making it possi* ble to easily and quickly remove and replace any one of the tubes.

I claim as my inventionl. The combination in a water-tube boiler, of two pairs of main drums having watertubes extendingr between them, with a third pair of drums smaller in diameter than the main drums and placed parallel to them, said smaller drums also having tubes whereby they are connected and being above the lower and below the upper of said main drums, substantially as described. l

2. The combination in a water-tube boiler of upper and lower maindrums having tubes extending between them, with an auxiliary set of drums lying parallel to the main drums and also having tubes extending between them, said auxiliary setof drums being above the lower and below the upper of the' main drums, substantially as described.

3. The combination in a water-tube boiler, of upper and lower main drums having tubes extending between them, with an auxiliary set of drums also having tubes connecting them and placed above the lower and below the upper of the main drums, said auxiliary set of drums being parallel with and connected to the main drums and of less capacity than the same, substantially as described.

4. In a water-tube boiler, the combination of two pairs of main drums, substantially vertical tubes connecting the members of each pair, a pair of auxiliary drums below the upper main drums and above the lower main drums, said auxiliary drums being parallel to said main drums and alsohavingsubstantially vertical tubes connecting them together, with a baille-wall supported by the lower of said auxiliary drums, substantially as described.

5. In a water-tube boiler, the combination of two pairs of main drums, water-tubes connecting the members of each pair, a pair of auxiliary drums between said pairs of main drums, and also having water-tubes connecting them, said auxiliary drums being above the lower and below the upper of the main drums, and a battle-wall supported by the lower auxiliary drum and extending between the tubes thereof to the upper auxiliary drum, substantially as described.

6. In a water-tube boiler, the combination of two pairs of main drums, water-tubes connecting the members of each pair, a pair ot' auxiliary drums between said pairs of main drums also having water-tubes connectiner them, said auxiliary drums being above the` lower and below the upper of the main drums and parallel to the same, and a baffle-wall supported by the lower auxiliary drum and extending between the tubes thereof to the upper auxiliary drum, said auxiliary drums being of a diameter less than the main drums and being connected thereto, substantially as described.

7. In a water-tube boiler the combination of two pairs of main drums, a series of watertubes of equal length connecting the members of each pair, auxiliary drums parallel to and between said main drums, also having tubes ot' equal length connecting them, tubes connecting the lower of the auxiliary drums with the lower main drums, and tubes connecting the Lipper auxiliary drum with the I upper main drums, substantially as described.

S. In a water-tube boiler, the combination ,of a furnace, upper and lower main drums having water-tubes connecting them, auxiliary drums of smaller volume between said main drums and also having tubes connecting them, with means for causing'the hot gases from the furnace to rise verticallyaround the tubes of the front pair of main drums and after passing between the upper main drums and the upper auxiliary drums, to flow down between the tubes connecting the rear main drums and the tubes connecting the auxiliary drums, said means finally causing the gases to pass over the lower rear main drinn and to enter a conduit connected to the stack, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ED TIN GRAY RUST.

lVitn esses:

AXEL H. HELANDER, JAMES F. CHAPMAN.

IOO

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