US700091A - Water-tube boiler. - Google Patents

Description

No. 700,09l'.

PatentedMay I3", I902. I E. G. RUST. WATER TUBE BOILER.

(Application filed Nov. 7, 1901.)

3 Sheets- Sheet l.

. (No Model.)

1 mikum m2 Mourns Pzrzne 120., 'momumo" WASNKNG'ION. n. c.

a sheets-s eet 2.

Patented May l3, I902.

E. e. RUST. WATER TUBE BOILER.

(Application med Nov. 7, 1901.)

No. 700,09l.

LNo MG deI.)

No. 700, 09|. v Patented May l3, I902.

E. G. RUST.

WATER TUBE BOILER.

(Application flld Nm}. 7, 19013 "(no Model.)-

UNITED STATES PATENT OFFICE.

EDWIN GRAY RUST, OF PUEBLO, COLORADO.

WATER-TUBE BOILER.

SPECIFICATION forming part of I Letters Patent No. 700,091, dated May 13, 1902. Application filed November 7,1901. Serial No. 81,420- (No model.)

To all whom, it nuty'cmwern:

Be it known that I, EDWIN GRAY Rusr, a citizen of the United States, residing in Pueblo, Colorado, have invented certain Improvements in Water-Tube Boilers, of which the following is a specification.

My invention relates to certain improvements in water-tube boilers, having for its object the provision of a boiler which shall not only be an efficient steam-generator, but also of simple and relatively inexpensive construction.

A further object ofmy invention is to provide a boiler ofthe character described in which the vertical tubes shall be interchangeable, the construction being such that said tubes can be used without being curved, it being also desired to provide a boiler in which. the baffle-walls for directing the course of the products of combustion shall be readily replaceable and at the same time of a construction not "readily burned out.

These objects I attain as hereinafter set forth, reference being had to the accompanyingdrawings, in Which s Figure 1 is a vertical sectional view of my improvedboiler, taken through the various drums and the furnace. Fig. 2 isa vertical sectional view taken on theline 2 2, Fig. 1. Fig. 3is a perspective View of a portion of the" tube-sheet of one of the drums used in my improved boiler. Fig. 4 is 'a vertical sectional view taken through the tube-sheet shown in Fig. 3 at right'angles to the axis'of the boiler-drum, and Fig. 5 is-a similar view taken through a drum having'four instead of three openings in a series of the vertical tubes.

In the above drawings, A is the boiler setting or casing, usually of brick, supported on suitable foundations a, preferably of concrete, and having a forwardly-extending section A, which serves asthe furnace. The interior of the brick casing, as well as of the furnace, is provided with a fire-brick lining a, and the'rear portion of the furnace has a projecting bridge-walled, carried on the main foundations ofthe boiler, the said furnace being-also provided with the customary fire and aslidoorsa and. a, and any desired form of grate a v Suitably supported at the lower part of the boiler are three drums B, B, and B and cal tubes 1), all of the same length in the present instance. I preferably place the upper drums farther apart than the lower ones, the

result of this being that while the dll1Il1-O lS vertically over the drum l3 and the tubes conmeeting them are vertical the drum 0 is out of line with the drum B',,thereby causing the tubes connecting these two latter drums to be slightly inclined. The tubes connecting the drums B and O are thus still further inclined, there being, preferably, no space between the drum B and the bridge-wall a which is generally directly under the drum 0. In'order that all of the tubes 61 may enter the drums normally to the surface thereof and without curving the tubes, as has been customary, 1 form the tubesheet of said drums, as shown in Fig. 3. For this purpose the sheetafter being curved to the shape of the drum is subjected to the action of a suitable press, and portions of its surface I) are pressed out or made to project in the form and arrangement shown. Each of these projecting portions has a flat top surface, and all of these flat top surfaces are preferably in the same plane, although there may be certain constructions which will make it desirable to have said projecting portions formed so that they would be in different planes. The holes I) for the tubes are then drilled or punched in this fiat surface, it being noted that between each of the projecting parts I) there is a curved portion 12 of the drumproper.

Referring to the other figures of drawings, it will be seen that by the construction of the tube-sheet therein shown allof the tubes are brought out normal to the' surface of the boiler and do not require curving. Series of tubes 6 connect the drums B, B, and B respectively, and there is also a series of slightly-curved tubes 0 extending between the drums O and ,0. There are'two smaller drums D, supported o verthe drums O andO connected to them through pipes 01. There are also pipes d,which connect the said drums Dwith the drum 0. The steam-supply main d is preferably connected to the pipes d near the point of junction with the drum D.

It will be seen that the fire-brick lining a extends between the drumsG and 0 directly over the curved tubes c, while the stack E forthe removalof the products of combustion is supported over and communicates with the space between the drums C and C the drums D being within the base of said stack.

There are hollow girders ff, preferably of cast-iron, extending across the interior of the boiler, upon which are supported battle-walls F and F. These walls are built in sections, as shown, certain of the sections being altogether independent of the others, thus making it possible to remove and replace any desired section without disturbing the others. The baflie-wall F is made with lateral projecting extensions f on its top portion, the said wall extending in a practically vertical line from the point of junction of the tubes 7) with the drum B to within a short distance of the drums C and C. The baiiie-wall F, on the other hand, extends from the inner side of the drum 0' vertically downward to within a short distance of the drum B.

In order to cause the products of combustion to circulate in the mostefficient manner, there is a lateral projection a extending inwardly from the back wall of the boiler at a point about midway between the lateral projections of the baffle-wall F. In order to easily remove accumulations of soot and to permit of easy access to the interior of the boiler for inspection and repairs, there are a number of doors a in the sides of the boilercasing. There are also doors a in the rear of the same. Each of the three lower drums is provided with a separate blow-elf I), each being preferably, but not necessarily, independent of the others.

It will be seen that products of combustion from the furnace A will enter the lower portion of the boiler and rise around the tubes connecting the drums B and 0 toward the top thereof, where, striking upon the bottoms of the drums C and 0, they are deflected downward between the baffle-walls F and F around the tubes connecting the drums O and B. They then pass under the lower edge of the bafiie-wall F and are deflected by the lateral projections f, a, and f through and around the tubes connecting the drums B and C finally passing up between the drums C and C and around the drums D into a stack.

The lateral projections f and f from the baffle-walls aid in promoting the most effective circulation of the hot gases around the practically vertical water-tubes, and it will be understood that by permitting this still hot gas to pass out of the boiler around the steam-drums D, I am enabled to obtain steam which is to some extent superheated.

By the arrangement of the baffle-walls built in sections, as shown, I am enabled to very easily and quickly replace any portion of said walls which has become burned out or injured from any cause, it being thus a comparatively simple matter to make this class of repairs. It will further be noted that the cast-iron girders f are made hollow and open to the atmosphere at their ends, permitting air to circulate and cool them, thus preventing overheating of said girders and their speedy burn= ing out.

By the peculiar construction of drums above described I am enabled to use watertubes all of one length, and that without curving or bending the same. This very desirable result is attained without any inconvenience of construction, for the tubes are brought out of their'respective drums normal to the surface and there is enough space between each series of vertical tubes to'permit of any single tube being removed and replaced without disturbing those around it. It will of course be understood that I do not confine myself to the use of any, particular number of tubes in the series at right angles to the axis of the drum, as I may use four, as shown in Fig. 5, or any othernumber, depending upon the heating-surface desired.

From Fig. 3 it will be seen that there is a portion of the cylindrical surface of the drum between each of the pressed-out sections of the tube-sheet, and this construction aids greatly in stiffening the drums, making them very materially stronger than they would be without said curved portions between the pressed-out sections.

It will of course be understood that while I show a boiler in which the drums are made of two sheets riveted together, one of which contains the pressed-out sections 1), I may, if I desire, construct the drums of buta single sheet, forming the projecting surfaces, as shown in Fig. 3, for the reception of the watertubes.

I claim as my invention- 1. In a water-tube boiler, the combination of a furnace, upper and lower drums, a number of series of straight tubes connecting said drums, the latter being constructed with a series of pressed-out plane surfaces tangent to their curved surface, the same being constructed to permit the entrance in the same plane of all the tubes in each series perpendicular to both the interior and exterior surface of said pressed-out portions without bending, a stack, means for causing the products of combustion to circulate around the tubes and drums as they pass from the furnace to said stack, substantially as described.

2. As a new article of manufacture, a tubesheet for a water-tube boiler, the same having portions of its surface pressed out to form a series of plane surfaces, each one of said surfaces being tangent to the curve of the tube-sheet and having an unaltered curved portion of said tube-sheet between it and the pressed-out surface next adjacent, substantially as described.

3. In a water-tube boiler, the combination of a furnace, upper and lower drums each having its curved surface pressed out so as to form a number of successive plane surfaces all in the same plane and separated from the plane surface on each side of it by-an unaltered curved section of the drum-surface, series of tubes extending between the drums, all the tubes of each series entering a single one of said plane surfaces, a stack and means for causing the products of combustion to circulate around said tubes during their passage from the furnace to the stack, substantially as described.

4. The combination in a Water-tube boiler, of a casing, a series of lower drums, a series of upper drums, straight tubes connecting each of the upper drums with one of the lower drums, the vertical baffle-walls between the sets of tubes arranged across the combustionchamber of the structure, having means whereby they are supported independently of said tubes and drums, a furnace-section connected with one end of the combustion-chamber and a stack connected to theother end of the same, substantially as described.

5. As a new article of manufacture, a tubesheet for a water-tube boiler, the same havingportions of its surface pressed out to form a series of plane surfaces, each one of said surfaces having an unaltered curved portion of said tube-sheet between it and the pressedout surface next adjacent, substantially as described.

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

EDWIN GRAY RUST. Witnesses:

A. H. HOLANDER, J AMES F. CHAPMAN.

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