US797329A - Steam-generator. - Google Patents

Description

No. 797,329. PATENTED AUG. 15, 1905. G. B. SGHEFLR ER.

STEAM GENERATOR.

APP-LI'BATION FILED AUG. mo. 19%.

CHARLES E. SCHERRER, 0F BELLEVUE, KENTUCKY.

S'ttEtiWl mtituEFttt'l'UFt.

no. ve /e29.

fipeeification of Letters Patent.

Patented Aug. 15, 1905.

Application filed August 20, 1904. Serial No. 221,499.

To all whom 'rrtrty concern.-

Be it known that l, CI-IAnLies B. Sonnnnnn, a citizen of the United States of America, and a resident of ldellevue, in the county of Llampbell and tEtate of Kentucky, have invented certain new and useful Improvements in citeam- Generators, of which the following is a speciiication.

This invention relates to certain improve ments in steam-generators, and particularly in that class of boilers which are designed for quick operation in generating steamas, for example, boilers for lire-engines, automobiles, and the like; and the object of the invention is to provide a generator of this general character and of a simple and inexpensive nature which shall be compact and strong in construction and especially adapted to atlord a maximum of etliciency for the generation of steam with comparatively small bulk and light weight, whereby the device is especially adapted for use by reason of the convenience with which it may be transported.

The invention consists in certain novel features of the construction, combination, and arrangement of the several parts of the improved generator whereby certain important advantages are attained and the device is made simpler, cheaper, and otherwise better adapted and more convenient for use, all as will be hereinafter fully set forth.

The novel features of the invention will be carefully defined in the claims.

in the accon'ipanying drawings, which serve to illustrate my invention, Figure 1 is a sectional view taken vertically and axially through the generator embodying my improvements, and Fig. 2 is a transverse section taken through the device in the plane indicated by line ft (0 in Fig. 1. Fig. 3 is a sectional view drawn to an enlarged scale and showing, detached and in longitudinal midsection, one of the water tubes or plugs with which the improved generator is provided. Fig. t is a sectional view taken transversely through the water tube or plug and showing the partition extended in the same to tacili: tate the circulation of water therethrough.

In the views, 1. indicates a metallic shell which forms the upper body portion of the improved generator and is provided at itsupper part with a central steam. exit or supply pipe 2 and has its lower part or base closed by a sheet 3 of inverted conical form, the up per larger portion of which is provided with an integral cylindric flange 4C, lapped outside of the lower edge of the body portion 1 and held thereto by rivets or otherwise to produce a tight joint between the parts. The basesheet 3 has at its lower smaller portion a nipple 5, alined with the axis of the generator and from which is extended downwardly a water-supply pipe 6, the lower extremity of which has connection with a blow-oft cock 7 and has also connection above said cock 7 by way ota coupling 8 with horizontally extended and alined pipes 9 and 10, the pipe 10 having connection with a feed-water-supply pipe 11, so that the generator is fed therefrom through the pipes 10 and 6.

'Within the lower portion of the generatorshell, which is termed of the body portion 1 and base-sheet 3, is extended a battle-plate or sheet 12, the upper edge portion of which is held beneath the lower edge oi? the body portion 1 below the lap of the members of which the shell is formed, said upper portion being also provided with a series of ports 14 concentrically arranged within the wall of the shell and of circular form, as shown in the crosssection, Fig. 2, of the drawings. The battleplate 12 is also of inverted conical form; but its sides have less pitch or taper than the sides of the base-sheet 3, and said bai'lie-plate is supported within the shell of the generator at an elevation above the base-sheet 3, where by a space or chamber 16 is produced between the baliic-plate and base-sheet, which chamber is of contracted thickness and is thicker or deeper at its lower part than at its upper portion by reason of the (litter-once in pitch or taper between the sides of the conical baffle-plate and base-sheet, between which the chamber is produced. The battle-plate has a central port or opening 15 at its lower part alined with the inlet-pipe 6, by which the generator is supplied with teed-water from the pipe 8, and said port 15 permits a circulation of water from within the generatorshell above the battlelate 12 to the space or chamber 16 below said battle-plate, as indicated by the arrow in Fig. .1.

Upon the base-sheet 3 of the improved generator li provide a plurality 01'' water pipes or plugs 17, which may be concentrically arranged and which are extended, as shown on the drawings, at right angles from the conical inclined surface of the base-sheet :t'or ditferent distances, so that the extremities of said tubes or plugs 17 are alined with each other in a circular plane concentric with the shell of the generator and also in a horizontal plane parallel with the water-level indicated at w within the generator. The tubes or plugs 17 are closed at their outer ends, as clearly shown in Figs. 1 and 3 and in order that the flames and hot gases from the burner or heater may circulate freely between said tubes to heat the water therein contained the tubes are spaced apart to provide openings or channels between them. The conical formation of the base-sheet and the angular arrangement of the plugs 17 insures a maximum heating eflect, since the flames and hot gases are thereby caused to circulate in contact with the surfaces of said base-sheet and plugs 17 and are prevented from being deflected, so that the heating effect is concentrated and dissipation of the heat is avoided. Any desired kind or type of burner or heater may be employed in connection with the improved generatoras, for example, a petroleum-burner, as indicated in dotted lines at 19, in Fig. 1. Each tube or plug 17 has its upper or inner end set in the base-sheet 3 in any desired way, so that water from the space 16 is admitted at said end of the tube and is permitted to circulate through the same to absorb heat imparted to the tubes by the circulation of the flames and hot gases between them, and in order to facilitate the circulation of Water through said tubes17 I preferably provide each tube or plug, as shown on the drawings, with a central diaphragm or partition 18, formed of a metal sheet or strip centrally and longitudinally extended Within the tube so as to provide upon its opposite sides passages, one of which is adapted for the inflow of water from the chamber 16 to the closed extremity of the tube and the other of which is adapted for the outflow of water from the tube to said chamber 16, as indicated by the arrows in Fig. 1, the outer end of each metal plate or strip 18 being formed with a notched or concaved edge surface, so that when the strip or plate is inserted within the tube an opening 18will be afforded at the end of the tube for communication between the passages at opposite sides of the strip or plate 18.

20 and 21 indicate pipe-coils extended concentrically outside of the shell of the generator and outside of the circular plane in which the ends of the tubes or plugs 17 are arranged, and these coils have their turns closely adjacent, so as to receive as much of the heat as possible from the flames or heated gases from the heater or burner below the generator. The coil 20 is above the coil 21 and surrounds the steam-space within the generator above the Water-level {0, While the lower coil 21 surrounds the water-space of the generator. Said upper and lower coils are connected by T connections or couplings 22, which are coupled with opposite sides of the body portion 1 of thegenerator in line with the water-level 50 therein.

As shown on the drawings, each of the coils 20 and 21 is, in fact, a double coil, being formed of two spirally-bent pipes the turns or spirals of which alternate with each other, and the upper end of each'of the pipes of which the upper coil 20 is formed has connection, as shown at 23, with the steam-space at the top of the generator. w

One of the pipes of which the lower coil 21 is formed has connection, as shown at 24, with a coupling 25, connected with the pipes 10 and 11, so that feed-water from the pipe 11 is supplied to that pipe of the coil 21, and the other spirally-bent pipe of which the coil 21 is formed has connection, as shown at 26, with the pipe 9, which, as above stated, is connected with the coupling 8 and is adapted for the supply of feed-Water to the last-named spiral pipe comprised in the lower coil 21. Each pipe in each of the upper and lower coils 20 and 21 has also a connection with one of the T-couplings 22 22, and by this construction it will be seen that the feed-water supplied to the pipes of the lower coil 21 is heated in its passage upward through said pipes and is discharged through the T-couplings 22 into the shell of the generator at the water-level 50 thereof, While steam generated in said lower coil and also within the generator-shell is permitted to pass by way of the T-couplings into the upper coil 20, in which said steam circulates and is superheated and is finally discharged at the upper ends 23 of the pipes of which said upper coil is formed into the steamspace at the upper part of the generator-shell.

The water entering the chamber 16 between the base-sheet 3 and baflie-plate 12 from the supply-pipe will be deflected by said baffle-plate 12 and caused to circulate through said chamber 16 and through the water-tubes 17, becoming gradually more and more highly heated until it is finally discharged through the ports 14 into the water-space above the bafl le-plate 12. There is also a downward circulation of water along the surface of the baflie-plate 12 and through the central lower opening or port 15 thereof from the waterspace above the baffle-plate to the chamber 16 between said baifle-plate and the basesheet 3 of the improved generator. In this way it Will be seen that the employment of the baflie-plate serves to produce within the lower part of the shell or casing two water spaces or chambers, one above and the'other below the baffle-plate, in which spaces or chambers is adapted to be contained Water at different temperatures, the cooler water being below the baflie-plate, so that it is caused to circulate along the heating-surfaces of the base sheet and water -tubes and becomes teases quickly and highly heated, so that a quick generation of steam is rendered possible. The blow-oil cock 7 being alined with the pipe 6 and with the lower contracted portion of the conical base-shect 3, at which sediment will naturally collect, is adapted for convenient employment from time to time for blowing oii the generator to discharge such sediment.

The improved generator constructed as above described is of an extremely simple and inexpensive nature and is of very c0in pact, light, and strong construction, so that it is especially well adapted for use, and particularly in connection with automobiles, lireengines, and the like, for which purposes the lightness and compact character of the generator and its capacity for quick generation of steam render the device especially adaptable.

It will also be obvious from the above de scription of my improvements that the device is capable of considerable change without material departure from the principles and spirit of the invention, and for this reason I do not wish to be understood as limiting myself to the precise form and arrangement of the several parts of the device herein set forth in carrying out my invention in practice. For example, in some cases the employment of the partitions or diaphragms 18 within the water tubes or plugs 17 may be dispensed with, although these partitions materially facilitate the circulation of water through said tubes or plugs. In other cases the arrangement of the coils 20 and 21 may be modified, or said coils may even be dispensed with altogether in certain cases without departure from the principles and spirit of the invention.

Having thus described my invention, what ll claim, and desire to secure by Letters Patent, is-

1. A. steam-generator comprising a shell having a base-sheet, a bathe-plate extended across the interior of the shell below the wa ter-level and adjacent to the base-sheet and provided with ports and forming in the shell two water-spaces one above and the other be low the battle-plate, and adapted for containing water at different temperatures, means for supplying water to the space below the haflie-plate and water-tubes extended from the base-sheet at angles to .the vertical and provided with partitions longitudinally and centrally extended in them and forming in said tubes passages for the circulation of water from and to the space below the baffle-plate.

2. A steam-generator comprising a shell provided with a conical base-sheet and having a water-supply connection, a bathe-plate extended across the interior of the shell bewlOW the water-level therein and adjacent to the base-sheet and also of conical form and provided with ports and forming in the shell two water-spaces one below and the other above the baflie-plate, water-tubes extended from the base-sheet and partitions longitudinally and centrally extended in the watertubes and forming in each tube passages adapted for the circulation of water from and to the chamber below the baffle-plate.

3. A steam-generator provided with a shell having a base-sheet, a fire-box below said basesheet, a baffle-plate extended across the shell below the water-level and forming in the shell two communicating Water-spaces below and above the balile-plate respectively, means for supplying water to the space below the batiie-plate and a pipe-coil surrounding the generator and the fire-box and having connection with said generator at the water-level and also having connection with a source of feed-water supply.

4:. A steamgenerator comprising a shell having a base-sheet, a battle-plate extended across the shell below the water-level and formed with ports and forn'ling in the shell two water-spaces one above and the other below the baflie-plate, means for supplying water to the space below the batlleplate, a pipe coil surrounding the shell at the upper part thereof and having at its upper part communication with the upper part of the steamspace of the shell, another pipe-coil surround ing the generator and having connection at its lower part with a source of feed-water sup ply and connections between the respective pipe-coils and the shell at the water-level thereof.

Signed at Cincinnati, Ohio, this 17th day of August, 1904:.

CHARLES E. SCHERRER.

Witnesses:

E. P. KnIEeI-rorr, JOHN ELIAS Jones.

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