US2178619A - Tubular boiler - Google Patents

Description

Nov. 7, 1939.

Filed Feb. 3, 1938 0 m C w m T A R/ 1 1 000/ 7 ooo 00% 5 000 m O00 blml l I mu n F 00, A 9 0 .w

patented Nov. 7, 1939 2, 1 1

UNETED STATES ATENT OFFiCE TUBULAR BOILER Arthur P. Victor, Minneapolis, Minn, assignor of one-half to Herman E. Victor, Minneapolis, Minn.

Application February 3, 1938, Serial No. 188,472

2 Claims. (Cl. 122265) My invention relates to boilers and has for an in the drawing with which the invention is parobject to provide an extremely simple and practiticularly adaptable. cal boiler particularly adapted for use for heat- The construction, illustrated, comprises an ash ing purposes. pit section I 0, a fire box section l I and a combus- 5 Another object of the invention resides in protion chamber section l2. All of these parts are 5 viding an extremely compact construction which supported within a frame work it and are sepacan be erected at aminimum expense. rately renewable in case of wear or in case the Another object of the invention resides in prosame become otherwise disqualified for use. viding a highly .efiicient boiler and one where the Within the combustion chamber section I2 is heating medium can be quickly brought up to arranged the heat exchange unit, which is indi- 10 the desired temperature. cated in its entirety by the reference numeral M.

A still further object of the invention resides This heat exchange unit comprises an upper heat in providing a boiler which can be readily used exchan e member l5 and a lower h at eXChangB for coal, gas or liquid fuels. member it. These various parts will now be An object of the invention resides in constructdescribed indetail. l5 ing the boiler with two heat exchange members, The ash p Sectlon m Comprises a rectangular each having one or more elongated passageways Casting H p at the p d ot om and co and in arranging said member n above th structed with a rear wall l8, side walls l9 and other within the boiler. with vertical flanges 2! extending upwardly along Another object of the invention resides in ar- 2 Ward DE FE of z g t 12 f g 20 ranging the uppermost heat exchange member omqlng an as p1 p m a t e orwar with its passageway substantially horizontal and tlon of the samettached t0 the P the lower heat exchange member with its pasfaces ofthe flanges 2i is a plate 23 which is prosageway inclined from a position above the fire vlded Wlth an ash plt doorway 24 Closed by an 25 door at the front of the boiler downwardly toward 2 ig; g i g gfi fg g g gaggi gu fi 25 the rear of the boiler. P C

A feature of the invention resides in connecting f gt fongs no ptargcular if e 3 said upper heat exchange members at the rear i and as een 5 own m e end OI the Same to Said law-er heat exchange The ash pit section it supports the grates of 30 member at the lowermost portion thereof and at the invention in the following manner m9 Its rear and m provldmg an Inlet connected tending about the walls 18 and 9 and flan es M to the o'tner end of the upper heat excnange of the casting ll is a ledge 25 which is near member, and an outlet connected to the other the upper eaves the same Tljlis 1e carries end of t lower h'eat e9hangememner' two longitudinally extending plates 2? which are 35 A feature of the invention resides in co-nstructformed with inwardly projecting flanges 28 mg sald heat exchang? member Wlth i of Resting on the flanges 28 and upon the ledge 2%, tubes Connected to manifolds open at then outer of the rear wall i8, is a similar plate 29. A corfaces and m provldmg qover mates secured responding plate 3i, at the forward portion of the the open portions of said manifolds exterlorly casting m is Supported solely on the flanges 23 40 of the boiler for closing the m of the plates 2'1. The plates 27 and 29 overlie Other objects of the invention res1de 1n the the upper edges f the Walls of the Casting H and novel combination and arrangement of parts and are .rabbeted as indicated at 2 to fit the Same in the details of construction hereinafter illus- The grates f the invention comprise two Hated and/or. describedtionary grate plates 33 and 34 which are posi- 45 In the drawl i tioned adjacent the plates 29 and 3|. These 1 is a Vertical Sectional View of a boiler plates are constructed with openings 35 through illustrating an embodiment of my invention. which th i may pass, Between these plates Fig. 2 is a rear elevational View of a portion of are t rocking grates 36 and 37 which are proth boil S o in vided at their ends with trunnions 38. Trun- 50 Fig. 3 is a plan sectional view of the boiler shown nions 38 fit into notches 39 in the flanges 28 and in Fig. l and taken on line 3-3 of Fig. 1. are thus supported for rocking movement.

y invention y be u d t d e t ype The two grates 35 and 3B are provided with deof boiler settings and for the purpose of illustrapending arms 4|, as best shown in Fig. 1. These tion a particular type of setting has been shown arms are connected together by means of a link 55 42. Another link 4-3 is connected to the arm 4| of grate 35 and to an arm M- of a shaker lever 45. Shaker lever 45 includes a shaft 45 which extends through one of the walls IQ of the casting H and is journaled in a boss ll formed therein. The lever 15 is provided with a handle 48 by means of which the same may be manipulated.

It will be noted that the flxed grates and 3d are of substantially the same width as the rocking grates 3G and and notches 39 are provided centrally with respect to the space occupied by these grates so that other rocking grates may 3e substituted in place of the fixed grates, if desired. When the grates are properly installed the upper surfaces of the and the plates 2'1, 29 and Si all lie in a common horizontal plane.

The frame it, of the invention, consists of four uprights 5%, 52, and M which are angular in cross sect-ion and are bolted to the casting il at the corners thereof. These uprights have socured to the upper ends of the same cross frame members which mitered at the corners and riveted to said vertical uprights.

The fire box section ll, of the boiler, is constructed from fire brick, indicated at 53, which is laid in courses with the joints staggered. Where standard. sizes of brick are used, six courses employed at the front and sides, and an extra course indicated at El utilized at the rear of the flre box section These brick may be laid flat, as shown, where desired. The brick if preferred may be laid on edge, in which case less courses are required.

I'he combustion chamber section i2 is constructed from four sheets of asbestos mill board til, 62, "33 and G4 which are disposed within the uprights 59, 52, 53 and 54 and are bolted or otherwise secured thereto. This asbestos mill board is of sufficient thickness to give the desired insulating effect and to confine the heat within the boiler. A metal plate 55 is secured to the upper flanges of the angle frame members 55 and carries a thimble 58 to which a smoke pipe 59 is secured. This plate may be bolted or otherwise secured to the angle frame members 55.

In the sheet 62 of mill board is provided an opening 56, at the lowermost portion of the same, and in which is inserted a fire door frame Ell which has an opening '38 in it. This frame is constructed with flanges 69 and ll at the sides and top which snugly flt against the edges of the mill board formed by the opening 68. The said frame further includes a ledge 12 which rests upon the upper course of brick forming the fire box section ll. The frame 61' is further constructed with a flange it Which overlies the outer surface of the sheet of mill board 551 and is secured thereto and to the two angles 5E and 56-. A door 14, hingedly mounted on the frame 61, closes the opening 68 through said frame. Inasmuch as the construction for mounting the door does not form any particular feature of the instant invention, the same has not been illustrated in the drawing.

The heat exchange unit M, as previously stated, consists of two heat exchange members it and it which will now be described in detail.

The heat exchange member It comprises two box-like manifolds and 16 which are identical in construction and are constructed with inner walls '17, upper and lower walls '53 and it) and end walls 89. These manifolds are open at the outer portions thereof opposite the inner walls H. A flange encircles each of the manifolds at the open portion thereof and is formed at the outer ends of the walls 18, T9 and ill and is adapted to overlie the uprights 5|, 52, 53 and 54 and the sheets of mill boards ti and 62. Suitable openings 83 and B4 are formed in the sheets of mill board 6% and 62 to receive these manifolds which project inwardly into the combustion chamber l2, as clearly shown in Fig. 1. Between the two manifolds l5 and it are provided a number of tubes 85 which extend through the walls ll and are swedged at their ends to form a tight joint with said walls. These tubes form a bank of tubes which bring the two manifolds into communication. Plates 86 and ill are bolted to the flanges 82 of the manifolds l5 and i6 and close the outer open portions thereof.

The heat exchange unit M is constructed similar to the heat exchange unit it and comprises two manifolds 88 and 89 which are identical in construction, excepting that the same are arranged in inverted relation with respect to one another. These manifolds are triangular in cross section and are constructed with inner walls 9!, lower or upper walls 92 and end walls 93. A flange at encircles the walls Si, 92 and 9.3 and serves the same purpose as the flanges 32 of the heat exchange member H5. The entire heat exchange member M is arranged on an incline, as shown in Fig. l, sloping from a position above the fire door frame 5'. and in proximity to the heat exchange member if) to a position immediately above the course of brick 51 at the rearward portion of the fire box section ll. Due to the construction of the manifolds 3B and 89, of triangular cross section, such arrangement is made possible and the flanges 94 caused to overlie the sheets of mill board 6i and 62 and the uprights El, 52, 3 and 5 1. Between the walls SI of the manifolds 88 and :39 are provided tubes 95 which are secured to said walls in the same manher as the tubes 85 and serve the same purpose. Plates 96 and Eli are attached to the flanges 94 and close the open portions of said manifolds.

The manifold 86 is supported on a small angle it which is attached to the uprights ill and 54. The flange 82, of manifold l5, rests upon the flange Q6 of manifold 39 and is supported thereby. The manifolds l5 and 88 are similarly supported on angles ldi and Hit which are attached to the uprights E32 and To form a tight joint between the flanges and at and the respective sheets of mill board which they overlie, fillers I03 constructed of asbestos of the same thickness as the flanges of the uprights all, 52, 53 and 54 are utilized which are held between said flanges and sheets of mill board, and which bring the flanges flush with the outer surfaces with the uprights 5!, 52, 53 and E i. If desired, the manifolds 75, it, 83 and 89 may be secured to the sheets of mill board and the uprights supporting the same. I have found, however, that this is unnecessary for when the parts are unattached a certain amount of freedom is given which permits of expansion of heat exchange members, independently of the boiler proper, without causing undue leakage.

The manifold i5 is connected to the manifold 88 by means of two pipes le t and H15. These pipes have secured to the ends thereof, flanged elbows i636 and which are bolted to the plates and 96. These elbows communicate with the interiors of the said manifolds by means of openings in the plates and @6, not shown in the drawing. The two manifolds l5 and 88 have connected to them pipes and H9 which have secured to the ends thereof flanged elbows Ill and l l These elbows serve the same purpose as the elbows lot and Hill and bring the pipes I08 and 4%" not:

into communication with the chambers in the ifolds i5 and 89. The pipe Hi8 serves as an et pipe and the pipe Mil serves as an outlet pu s for the boiler.

Within the interior of the combustion chamber section if is provided a beveled ledge l i3, cont acted of some suitable plastic ceramic material, which extends from the upper course of brick to the inner surfaces of the sheets of mill board 65, (-352, 83 and 5 5. A similar ledge EM is laid upon the upper course 5'! of brick and extends up to the lower wall 92 of the maifold 88. In this manner pockets for the accumulation of soot and fuel are prevented. Upon the upper portion of the heat exchange unit M is placed a baflie llii, constructed of asbestos mill board, similar to the walls of the combustion chamber. other baffle H6, similarly constructed, is laid on the hea-u exchange member 15. Both of ti" .ze bafiies are shorter than the tubes on which they rest and by means of the same the interior of the combustion chamber section I2 is divided into combustion chamber proper, indicated at intermediate chamber H8 and a smoke box chamber H9. Due to the fact that the baf- H5 and H5 are shorter than the tubes on ch they rest, passagweays l2! and I22 are ned which bring these Various chambers into communication.

The method of utilizing the invention is as follows. The boiler is installed and connected to the chimney through the smoke pipe 59 in the customary manner. Pipe M8 is connected to the return of the steam or water system with which the boiler is to be used. Pipe M9 is connected to the feed pipes of the system. When the boiler is fired in the customary manner, the heated gases generated in combustion chamber proper 63 rise and heat is transferred to the tubes 95. The gases of combustion pass upwardly through the passageway l2! and enter chamber H3 where additional heat is absorbed by the tubes 85. The gases of combustion finally leave this chamber through passageway H22 and enter the smoke box chamber 1 it where the same pass out through the smoke pipe 59 to the chimney of the building in which the boiler is installed. In this manner, the hot gases come in contact with two heat exchange members and a greater portion of the heat of the said gases is absorbed.

The advantages of my invention are manifest. An extremely simple and practical construction is provided which produces highly efiective resuits and is extremely efficient. By constructing the tubes of the heat exchange members of copper, rapid transfer of heat occurs and changes of temperature in the fire box are rapidly transmitted to the heat exchange members. By the arrangement of heat exchange members rapid circulation of the heat exchange fluid is procured. At the same time, a minimum amount of space is occupied by the heat exchange members and the chambers constituting the combustion chamber are maintained relatively small so that the heat is readily transferred to the heat exchange members and a minimum amount of heat through the exterior walls of the boiler. I have found that, a boiler constructed, in accordance with my invention, of considerably smaller dimensions than boilers heretofore used, can be employed to heat buildings of the same size. I have further found that considerably less fuel is required than with ordinary boilers to procure the same heating effects.

While I have shown the boiler as adaptable for use with coal or solid fuel it can readily be comprehended that the boiler may be built to utilize gas or liquid fuel by the adoption of suitable gas or oil burners and the boiler changed in the necessary respects to adapt it to such uses.

Changes in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. In a boiler, a wall structure providing a heat exchange chamber and including front and rear walls, a manifold in said front wall near the upper portion thereof, a second manifold in the rear wall opposite said first manifold, a third manifold in said front wall disposed immediately below said first manifold and in juxtaposition with respect thereto, a fourth manifold in said rear wall disposed beneath said third manifold and spaced therefrom, said manifolds extending through said walls and into said heat exchange chamber, a bank of tubes between said first and second manifolds and extending in a substantially horizontal direction, a bank of tubes between said third and fourth manifolds and extending in an inclined direction, the aggregate cross sectional area of the tubes of both banks being substantially equal, a conduit connected to said second and fourth. manifolds, an inlet directly connected to said first manifold and an outlet directly connectedto said third manifold.

2. In a boiler, a wall structure providing a heat exchange chamber and including front and rear walls, a manifold in said front wall near the upper portion thereof, a second manifold in the rear wall opposite said first manifold, a third manifold in said front wall disposed immediately below said first manifold and in juxtaposition with respect thereto, a fourth manifold in said rear wall disposed beneath said third manifold and spaced therefrom, said manifolds extending through said walls and into said heat exchange chamber, a bank of tubes between said first and second manifold and extending in a substantially horizontal direction, a bank of tubes between said third and fourth manifolds and extending in an inclined direction, the aggregate cross sectional area of the tubes of both banks being substantially equal, a conduit connected to said second and fourth manifolds, said conduit being disposed exteriorily of said wall structure, an inlet directly connected to said first manifold, and an outlet directly connected to said third manifold.

ARTHUR P. VICTOR.

Images