US1229171A - Water-tube boiler. - Google Patents

Description

H. A: TURNBULL,

WATER TUBE BOILER.

APPLICATION man IUD/22,3915.

FL D Patented Jun 5, 3917.

2 SHEETS-SHEET I.

.H, A. TURNBULL,

WATER TUBE BOILER.

APPLICATION FILED JULY 22,1915.

W 13 Q Q 1 5 n 3 2 mm NZ A. .m m m i m A H .V% AL v l m 2 m HENRY ALEAANDERTURNBULL, OF SURREY HTLLS, VICTORIA, AUSTRALIA.

WATER-TUBE BOILER.

To'all whom it may concern:

Be it known that LHENRY ALEXANDER 'TURNBULL, residing at 50 New-ton street,

Surrey Hills, in the-State of Victoria and Commonwealth of Australia, a subject of the King of Great Britain, have invented certain new and useful Improvements in Water-Tube Boilers, of which the-following is a specification.

This invention is devised to secure greater efiiciency in the production of and maintenance of a steam supply for marine and other engines, and. for all other purposes. One of the characteristics and objects of the combination of parts as hereinafter described is the'provision of a set of steam generating elements which shall be separately removable and interchangeable and at the same, time adapted to produce the most rapid circulation and a highpressure of steam with economy of fuel. Another object is to attain the before stated result with the minimum of expenditure for cleaning and repairs and to enable the same to be conducted'with little inconvenience and without long stoppage of the engines or work.

One of the principal features of my in-' vention is that the boiler consists of a number of sets of straight vertical water tubes or steam generating tubes. A number of these are joined at'the top to a header tube,

which is horizontal, all being of convenient length and diameter to suit the various requirements and purposes. A similar header is provided "at the bottom. The two headers and set of vertical tubes constitute one of the elements referred to. of the top and bottom header by -the vertical tubes in the -manner described allows, tubes of smaller size to be used, and ob tains greater effective circulation of water through the tubes, than previously practicable on a given basis. The number oftubes and the length and size are adjusted to suit requirements. Any required number of such elements are placed within the furnace combustion space side by side. All the bottom headers are connected with a mud drum and the top headers with a steam water drum. Each bottom header and top header with the set of vertical tubes forms an ele-' ment which element is interchangeable with other elements thus greatly facilitating cleaning and repairs.

One embodiment of. my invention and Specification of Letters Ifatent. Application filed .iul 22, 1915. Serial No. 41,221.

- looking in the direction of arrow The connectionv ]Patented June 5, 1917.

some modification to'suit differing conditions are illustrated in the accomp nying drawings in which Figure 1 is a side sectional elevation of boiler with transverse steam and water drum.

Fig. 2 is an end sectional elevation of boiler taken through line X.X Fig. l and Fig. 3 is a back view of Fig. 1 looking in the direction ofarrow Y. p

Fig. 4 is a side sectional elevation of boiler with longitudinal steam and water drum.

Fig. 5 is an enlarged section through downtake mud drum and lower header.

Fig. 6 is'an alternative method of hand hole fitting at front end of headers.

Fig. 7 is an enlarged section of mud drum showing an alternative method of fixing lower header in same.

' Fig. 8 is an elevation of mud drum and with lower header as show to same. v

Fig. 9 is an arrangem'ntof tubes and cast iron spreaders for supporting baffles.

Fig. 10 is an elevation of tubes showing baffles. v I

Fig. 11 is a view showing a valve and fitting to a down pipe.

in Fig. 5 fitted One of the most useful ordinary embodiments of my invention is illustrated in Figs. 1, 2 and 3. The part marked 2 is the-furnace, 4c'the furnacebar, 6 the furnace door opening, and 8 is part of the fire brick lining. 10 is the bottom header and 12 the top header, 13 the vertical tubes, 14 the mud drum, 15 the water and steam'drum, 16

down comer, 17 man hole door, and 18 the steam o'fi' take. 19 shows the jointing. of the upper end of the down comer. The end is expanded into the bottom of the steam and water drum, strengthening plate 20 being fitted inside the shell plate 21. The element will be seen in Fig. 1 consisting of bottom header 10, top header 12, and set of vertical tubes 13, which are fifteen in this case, but may be any number more or less. The joint between the upper header and the water drum may be formed -in one or other of the ways shown in Figs. 5 or 7. Both or either of these may be applied to top or bottom headers. The vertical tubes may be fitted to the top header by expanding and the bottom header by screwing or if desired both'top and bottom ends may be expanded into the'top and bottom headers respectively. Each down comer is joined tothe mud drum ,by a'joint as shown. 22 are the screw plugs at the top 'of each tube 13. 23 is the uptake, 24 is the steel casing of boiler, which may have suitable doors or openings as at 47 for inspection and cleaning purposes. The boiler is sometimes portable being in- 1 closed entirely by metal casing" or it may be totally inclosed by brick work or partly of one and partly of the other.

Fig. 2 isa sectional elevation showing the same' parts and also gage glass. 25 and diagrammatically superheater 26 (Fig; 1).

Fig. 3 illustrates an endsectional elevation of the boiler.

.. 5 and 6 respectively.

In the bottom of the mud drum oppositev cover 31,'closing the ends of mud drum. At v the front end of each top and bottom'head'er is fitted a removable screw cap 29 or a hand hole door 30 both as shown in detail'in Figs. The mud drum is 'shown square but both it and'the headers may be of square, round or oval section.

always necessary, fitted at its top endwitl a valve such as a miter valve seating upon the annular top of the down comer.

wardly through a screw passage'in the top of the. drum andbeing; at the top attached to a wheel exterior of the drum by turning is illustrated in Fig. l1. l6 is-the 'down 1 ,comer' which in this case is shown attached to the shell 21 of the steam water drum by means of a flange 52. The down comer extends upwardly to within the steam water drum 15 and is formed with a miter seat 53 upon. which seats the valve 54 which has a stem 55 extending to'a wheel handle 56 external to the drum. A suitable packed gland connection 57 is to keep the valve stem.

steam tight.

- The elements are sometimes placed one alittle forwardof the other so that the position of the vertical pipes is staggered as shown'in Fig. 9, in order to better attain the advantage of the products of combustion.

In the steam water drum for the purpose I of more effectively separating the water from the steam as it emerges from the top header a small baffle plate 49 (Fig. 1) may be provided opposite the opening where the steam emerges. v

The water level in the steam water drum is arranged to be at a desired predetermined position either above or below the entrance Y The valve' is attached to a stem extending up- I In Fig.- 4isrepresented a from the header. I A perforated dry pipe 48 'ora steam dome. may be attached. The economizer referred to-may be at any suit able position inthe upper part of the fur-*- I nace chamber or elsewhere (one example beingshown in Fig. 1.) Some of the orditiveness of the foregoing devices consists in the division of the chamber and thedirection of the furnace gases by means of two;

three or more baflles so constituted'that'the gases from the furnace are carried across the vertical tubes at right angles. thereto. Thismay be efi'e'cted by the means ill11s' trated in Fig. 9. The two spreader plates Y I 32,- 33, having holes to fit around the tubes are clamped together by bolts 34. -These plates support suitable corresponding fire brick strips 35 thus forming the equivalent of one bafil'e36 and another bafiie-37. This,

arrangement in conjunction with the shape of the furnace and the flue space .provlded at each side 38 and 39 enable the superhea'ter position shown Where it receives the heat from the furnace gases after the tempera- I 26 to be very advantageously placed in'the" Each down comer may be though it is not ture has been lowered to a suitable degree.

The path of the gases is shown by the arrows, being from left to right between and around the tubes past thesuperheate'r back from right to left between and around-the tubes then up to the top space which is specially adapted by this construction and arrangement for the economical employment of the economizer.

modification or alternative in which the water steam drum 15 is longitudinal with the headers. In this casethe uptake is on one'side of the boiler accordingly. Otherwisethe construction is the same as 'hereinbefore described.

andthe connections of parts are adjusted Fig. shows bottom header 1( vertical tubes 13," and one method of joining the element to themud drum '14 consisting in flange 4O whichmay be screwed. as shown or may be welded to theheader. 16isthe down comer expanded. at 41 into the mud drum. 27 are hand holes and 28 doors for A inspecting and cleaning. I

In Fig.-6 is shown. the front'end'of a header with hand hole and door 30' instead of screw cap. The flanges 4.0'shown in Fig.

5 are secured to the mud drum asshown in Fig. 8. Theflange of the upper header is secured to -the saddle plate Qfin a similar manner.

In, Fig. 7 is shown analte'rnative method of securingtheheader to the mud drum by I means of expanding. 1.0 isth'e header, 149' the mud drum, 43 the nipplefwhieh is expanded into the header at one end, and into the mud drum at the other When this method of connecting the elements is used the top header is connected to the steam water drum in a like manner.

I claim 'A Water tube boiler, comprising an inner and outer-lining, a combustion chamber in the lower portion of the inner lining, a plurality of heating elements each consistingof a plurality of vertical tubes and upper and lower headers with which the tubes are connected, the elements being arranged with their tubes in staggered relation and their headers on the same level and close together,

the lower headers being arranged directly above the combustion chamber, horizontal bafile plates projecting from opposite sides of the inner lining and through which the tubes pass, a steam drum, a mud drum, and a plurality of down-comers connecting the steam and mud drums, the steam and mud drums and down-comers being outside of the inner lining.

Signed at Melbourne, in the State of Victoria, Australia, by me, the said HENRY ALEXANDER TURNBULL this 25th day of May, A. D. 1915.

HENRY ALEXANDERTURNBULL.

In the presence of CHARLES NICHOLAS CoLLIsoN,

AMY MABEL VOIG

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