US1603500A - Boiler - Google Patents

Description

W. H. WIINSLOW BOILER Filed May 31. 1921 5 Sheets-Sheet 1 W. H. WINSLOW BOILER Filed May-51 1921 5 Sheets-Sheet 5 (ZZ /i an? e gs.

W. H. WINSLOW BOILER Filed May 51 1921 5 Sheets -Sheet 4 W. H. WINSLOW BOILER File y 31 1921 5 Sheets-Sheet 5 Patented PATENT OFFICE.

WILLIAM H. WINSLOW, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WINSLOW SAFETY HIGH PRESSURE BOILER COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION O- ILLINOIS.

BOILER.

Application filed May 31, 192-1.

My invention relates to steam boilers.

The boiler Which I shall illustrate and describe in detail'in the following specification is particularly adapted to automotive work, but it will be understood that the invention is not limited to any specific use.

In producing a boiler for such work as trucks, tractors, pleasure vehicles and the like, there is the requirement of relatively large capacity to be confined in limited space with the additional requirement of absolute safety and a high degree of accessi' bility. VVit-h all of these relatively light Weights and a high free steaming rate is required.

The present boiler of my invention is of the general Winslow type, that is, characterized by a construction in which the separating space is provided in the form of a series of tubes above the regular water circulating tubes, these tubes being all welded to headers, and the boiler being formed in sections.

A particular object of the invention is to produce a single pass boiler in which the heating of the sections is equalized, and in which the tubes are very closely nested.

A further object is the provision of a steam separator in the rear header of each section. Other objects will be apparent from the following description.

In order to acquaint those skilled in the art with the manner of constructing and operating my invention, I shall now describe in detail in connection with the accompanying drawings which form a part of the present specification, a specific embodiment of my invention.

In the drawings:

Figure 1 is a vertical section through the boiler, boiler casing and fire box showing one of the sections in elevation;

Figure 2 is a horizontal section on the line 22 of Figure 1, showing the boiler in plan view Figure 3 is a view similar to Figure 1 of a modification;

Figure =t is a fragmentary side elevational view of a number of the sections, illustrating a modified construction;

Figure 5 is a fragmentary plan view of the same;

Figure 6 is a side elevation partly in section showing the use of the steam separator in the rear header;

cleaning of the sections. It is not essential Serial No, 473,836.

Figure 7 is a section taken on the line 77 shown in Figure 6; and

Figure 8 is a diagrammatic plan showing the manner in which the sections may be placed to conform to the taper of the frame atthe front of an automobile.

The boiler is built up of a number of sections 1 comprising front headers 2 and rear headers 3 connected by a plurality of tubes. These tubes comprise the lower inclined water circulating tubes 4 and the upper substantially horizontal steam and water separating and steam drying tubes 5. termediate tubes are of intermediate inclination, the reason for this being that no definite water level need be maintained in the present boiler. While normally the sec- The intions are filled to a level in the neighbori hood of the line marked VVL as shown on Figure 1, raising or lowering of this water level has no detrimental effect on the boiler, since all of the tubes are connected to the respective headers by welded joints which in the normal operation are adapted particularly in the upper part of the boiler to be wetted with water or with steam indifferently and at the same time subjected to a high degree of heat.

It will be noted that the tubes where they join the front header are reduced in diameter as by swaging in order that all of the tubes may be readily joined to said header without crowding. It will be noted that the front header 2 is substantially shorter and of a substantially smaller diameter than the rear header 3 in each case. The upper and lower ends of the front header 2 are closed by screw threaded plugs or caps 6 and These are made removable for easier that these plugs be removable and the ends of the header may be closed by a welded cap or the like. The rear headers 3 each consist of relatively large tubing as compared with the circulating and drying tubes 5. The lower end of each rear header is re duced as indicated at 8 in order to permit it to be joined readily by means of the union 9 with the mud drum or water manifold 10. In a similarmanner, the rear headers are reduced a-t'their upper ends as indicated at 11 to cooperate with the screw plugs 12 which are connected to the flexible steam delivery tubes 13 which are joined to the steam manifold 14 by means of separable couplings 15. The pipes 13 which are of relatively small diameter are given .a turn as indicated at 16, so that a fair degree of flexibility in. this connection is secured for any disconnection and reconnection of the sections to the steam manifold 14:.

The mud drum or water manifold 10 is substantially U-shaped as is clear from Figure 2 and it serves to support, and connect together the various sections.

As will be plainly seen in Figure 2, the rear headers which are joined along the two sides of the U-shaped drum or {manifold 1U are placed closely adjacent to each other, so that they form or define a wall. The sections face alternately in opposite directions, and the relatively small size of the front headers 2 permits the tubes between the headers for the various sect-ions to be brought relatively close to each other, so that a very decided economy of space is effected. The front headers 2 lie in each case within the wall defined by the rear headers 3. These front headers .are substantially in contact with the rear headers, and are spaced from each other a distance substantially equal to the diameter of one front header, so that a section may be completely withdrawn without difficulty.

This provides an arrangement which is at once compact and economical of space, and is highly accessible.

It is desirable, as will more fully appear later, to have a rear header of a""substan- .tially greater diameter than the front header in order to secure greater freedom of separation of water andsteam. It is likewise desirable to have the front header of a relatively small diameter, in order to secure a relatively high velocity of the water flowing upward into the open end of the steam separating and drying tubes at the upper part of the section. These desirable features are combined to secure a struc.-

tural, as well as thermal advantage in the present boiler. The front headers are adapted to be subjected to a relatively high degree of heat, while the same is not so desirable with the rear headers. By the arrangement which. I have made, the front headers lie nearer to the fire gases than do the rear headers with the consequent assist- 18 is formed in the cover 17, although this aeaawo is not of the essence of the invention. ll provide an economizer 19, which is preferably formed in the shape of a flat coil having its discharge end 20 connected by a pipe 21 to a water manifold 22. The economizer coil 19 may be connected to the U-shaped manifold 10, which forms the mud drum during normal operation.

The use of'a separate water manifold 22 is optional, but for heavy duty, it is preferred that a separate feed Water manifold 22 be provided, so that the sediment may collect in the drum 10 and be blownoff without disturbing the feed water supply. The feed water manifold 22 is connected to the rear headers 3 through releasable connections 23, which has unions at 24 and 25, which may be released for the removal of a boiler section. These feed water connections 23 discharge the feed water into the rear headers at a point a short distance below the normal water level. The feed water manifold 22 is in the form of a Ill-shaped manifold passing around the rear end of the boiler, as is clearly shown in Figure 2.

The operation of the device is as follows:

A furnace 26 is provided in the space between the lower ends of the rear headers, and this furnace is adapted to have either grates where solid fuel is to be burned, or a suitable burner where liquid fuel is to be burned, either of the well-known vaporizing type or of the atomizing type, which I have indicated by: the fire box 27. is of the well-known type having an opening 28 for the introduction of a blast of air and fuel, which impinges against a vane 29 at the rear wall, dividing the blast into two currets which whirl within the fire box, and secure a very hot fire. The lowermost tubes are directly exposed .to the heat of the furnace, and they contain water which is caused to move upwardly along the inclined tubes into the front headers 2 of each section, where the water and steam is cast upwardly into the upper tubes above the water level and there separated, the water being drained back into the rear headers 3 and the steam being discharged through the connections 13 to the steam manifold 14,.and from thence to the main delivery pipe 30.

Due to the bowing of the lower tubes, they do not impose such great structural stresses upon the boiler as would be expected from This fire box ill) till

the steam which rises in this header, so that orderly separation and discharge of steam occurs.

Dueto the opposite inclination of the lower tubes of alternate sections, the effect of the impingement of gases upon these lower tubes is to create a cross current whereby the cure an effective cont-act between the fire.

gases and said tubes.

Feed water is introduced through the economizer 19 where it receives the heat of the gases before they pass through the stack, the water is then discharged into the water 'manifold 22 from whence it passes into the individual sections through the connections 23, or it may be discharged directly into the manifold 10, which serves as a mud drain, from whence it is discharged into the individual sections.

In Figure 3, I have shown a modified form, in which the flexible connections 13 are enlarged into superheating coils 31, these coils being bent back and forth, as shown in Figure 3 and lying between the tubcs of ad jacent sections. In this manner, the steam from each rear header is subjected to a superheating action before being discharged into the steam manifold 14. The superheater coils 31 lie in substantiallythe same plane. In other respects, the modification shown in Figure 3 is the same as'that shown in Figures 1 and 2.

In Figures i and 5, I have illustrated a modification in which the front and rear headers are built up in sections, so that injury to a part of one section may be remedied without removing the entire section. The lower tubes of a boiler of this character being directly subjected to an intense heat are more apt to be damaged than are the upper tubes. In the present embodiment, the rear header is divided into two sections 33 and 34 joined by a union 35, and

the front header is divided into two sections 36 and 37 joined by a similar union 38. By this means, a space is provided between the upper tubes 5 and the lower tubes 4, in which space I dispose a superheater 40 which is connected to the steam manifold 14.

The operation of this device is substantially identical with the operation of the device shown in Figure 1 so far as the thermal action is concerned. The superheater &0 being disposed crosswise would prevent the withdrawal of sections, but the provisions of the unions and 38 permit the lower parts or an upper part to be withdrawn without removing the superheater 40.

The front and rear headers are put substantially in line in-this form of the invention, although they may be disposed as indicated in Figure 2.

At the same time, the superheater 40 provides a thermal screen between the lower circulating tubes and the upper separating tubes, which is highly advantageous for heavy duty.

In Figures 6 and 7, I have illustrated the manner in which a steam separating ele ment may be employed in the rear header. Due to the large size of the rear headers they perform an important function of forming a steam separating space where there is enough room for the water to drop down while the steam is rising to the outlet.

I take advantage of the room provided by these headers to insert a steam separating element in the shape of a curved or cupped vane 41 which lies in the rear header 3 directly in line with the separating and drying tubes, so that any water which is discharged from said tubes will strike said vane or separator 41, and be deflected from direct passage to the outlet 42 which is formed at the upper end of the header 3 at the rear of the vane 41.

The vane 41 has its concave face turned toward the tubes and it extends only partway across the diameter of the header. It is long enough to extend a short distance below the normal water level although the length may be varied. The vane or separator 11 is attached at its upper end to a hollow plug 13 which seats on an annular shoulder I4: in the upper end of the header 3. A cap 15 closes the end of the header and at the same time holds the hollow plug 43 in place.

The provision of the separator in the rear header permits the boiler to be worked at a relatively high rate without priming and insures a smoother and more orderly evolution of steam. V

I do not intend to be limited-to the precise details shown and described.

I claim:

1. In a boiler of the Winslow type, a plurality of sections, each section comprising a front and a rear vertical header, the front header of each section being of a smaller diameter and of less vertical height than the rear header, a plurality of inclined water circulating tubes connected between said headers, a plurality of water and steam separating tubes also connected between said headers and lying above said water C11- culating tubes, said separating tubes having a different inclination from said circulating tubes, said sections being arranged side by side with alternate sections facing in opposite direction, the rear headers lying invariably beyond the front headers whereby the outside walls of the boiler are defined tubes, said sections being arranged side byside with alternate sections facing in opposite direction, the rear headers lying invariably beyond the front headers whereby the outside walls of the boiler are defined by said rear headers, and a U-shaped manifold connected to said rear headers and serving to supportcthe sections.

3. In a boiler of the Winslow type, a plurality of sections each comprising lower inclined circulating tubes and upper steam separating tubes approaching the horizontal, a pair of headers for each section joining the corresponding ends of the tubes, said tubes being welded to said headers, the headers comprising a cold header of larger diameter and a hot header of smaller diameter relative to each other, the cold header extending down below the lowermost inclined tube, said sections being juxtaposed in substantially parallel planes with alternate sections reversed so that the lower tubes of alternate sections are inclined in opposite directions, the cold headers forming two walls, the hot headers lying between the cold headers and being substantially in contact therewith, and a common steam manifold lying above said sections between the headers and lying transversely to the tubes.

4;;In a sectional boiler, sections of the Winslow type comprising each a cold header and a shorter hot header, said headers having their upper ends lying on substantially the same level, said sections being mounted side by side with the sections facing alternately in opposite directions, the cold headers formin outer side walls for the boiler, and a casing closing'ofl the ends of the boiler, a steam. manifold tube connected through steam pipes having turns in their lengths to each of the cold headers, said manifold tube lying between the walls of headers and parallel to the same, said manifold having no connection with the water space of the sections, and means for se arating out the moisture from the steam efoie the steam is delivered to the manifold tu e.

5. In a sectional boiler, sections of the Winslow type comprising each a cold header and a shorter hot header having their upper reoaeoc ends on substantially the same level, said sections being mounted side by side with the sections facing alternately in opposite directions, the cold headers forming outer side walls for the boiler with the hot headers nesting therebetween at the inside of a line diametrically through the cold header and a casin closing off the ends, a steam manifold tu e lying between the walls of headers and parallel to the same, said manifold having no connection with the water space of the sections, superheating pipes connected to the steam manifold and lying between adjacent sections of the boiler, and means for separating out moisture from the steam within each section to prevent moisture being carried into the superheating pipes.

,6. A boiler comprising a steam manifold and a plurality of units connected thereto, each embodying upwardl inclining generating tubes, and uniformly separated pairs of manifolds connected to the ends of the tubes,.the manifolds of adjacent units being arranged in staggered relation and the mani-' folds of each unit to which the upper ends of the tubes are connected being disposed inwardly of and in overlapping relation to the adjacent manifolds to which the lower ends of the tubes are connected.

7. In a boiler, a plurality of sections, each section comprising a front and a rear header, and a plurality of inclined circulatin; and separating tubes connected to the said headers, said sections being arranged side by side with alternate sections facing in opposite directions, the rear headers lying invariably beyond the front headers and defining the outside walls of the boiler.

8. In a boiler, a plurality of sections, each section comprising a front and a rear header, a plurality of inclined circulating and separating tubes connected to the said headers, said sections being arranged side by side with alternate section-s facing in opposite directions, the rear headers lying invariably beyond the front headers and defining the outside walls of the boiler, and a substantially U-shaped manifold connected to said rear headers and serving to support the sections.

9. In a boiler, a plurality of sections, each section comprising a front and a rear header, a plurality of inclined circul'atin and separating tubes connected to the said headers, said sections being arranged side by side with alternate sections facing in opposite directions, the rear headers lying invariably beyond the front headers and defining the outside walls of the boiler, a feed water manifold connected to the said rear headers, and an economizer disposed above the inclined tubes connected to the said feed water manifold.

10. In a boiler, a plurality of sections,

aeaasoo' each comprising lower inclined circulatin, tubes and upper steam separating tubes, an a pair of headers for each section joining the corresponding ends of the tubes, the headers comprising a cold header of larger diameter and a hot header of smaller diameter relative to each other, the cold header extending down below the lowermost inclined tube, said sections being juxtaposed in substantially parallel planes with alternate sections reversed so that the lower tubes of alternate sections are inclined in opposite directions, the cold headers forming two walls, the hot headers being disposed between the cold headers.

11. lln a boiler, a plurality of sections each comprising lower inclined circulating tubes and upper steam separating tubes, a pair of headers for each section joining the corresponding ends of the tubes, the headers comprisin a cold header of larger diameter and a hot eader of smaller diameter relative to each other, the cold header extending down below the lowermost inclined tube, said sections being juxtaposed in substantially parallel planes with alternate sections reversed so that the lower tubes of alternate sections are inclined in opposite directions, the cold headers forming two walls, the hot headers being disposed between the cold headers, and a steam manifold connected through steam pipes to each of the cold headers, said manifold lying above said sections between the headers and lying transversely to the tubes,

l2. lln a boiler, a plurality ot sections,

comprising a cold header of larger diameter and a hot header of smaller diameter relative to each other, the cold header extending down below the lowermost inclined tube, said sections being juxtaposed in substantially parallel planes with alternate sections reversed so that the lower tubes of alternate sections are inclined in opposite directions, the cold headers, forming two walls the hot headers being disposed between the cold headers, and a common steam manifold lying above the sections between the said walls and having connection with alternate headers only.

13. In a boiler, a plurality of sections, each section comprising a front and a rear header, a plurality of inclined circulating and separating tubes connected to the said headers, said sections being arranged side by side with alternate .sectionsfacing in opposite directions, the rear headers lying invariably beyond the front headers and defining the outside walls of the boiler, each of the said front headers being positioned in proximity to two rear headers and being in a space partially defined by the arcuate walls of the said two rear headers associated therewith, and a steam manifold positioned intermediate the walls and connected to alternate headers only.

In witness whereof, ll hereunto subscribe my name this 20th day of May, 1921.

WILLIAM H. WINSLOW.

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