US1928861A

US1928861A - Locomotive boiler

Info

Publication number: US1928861A
Application number: US569346A
Authority: US
Inventors: Jr Jesse C Martin
Original assignee: Individual
Current assignee: Individual
Priority date: 1931-10-16
Filing date: 1931-10-16
Publication date: 1933-10-03
Anticipated expiration: 1950-10-03

Description

Od. 3, 1933. l Q MAR-11N, JR 1,928,861

LOCOMOTIVE BOILER Filed Oct. 16, 1931 4 Sheets-Sheet' l O O O O O O 38 O O O O O O Oct. 3, 1933.

Filed Oct. 16, 19,31

4 Sheets-Sheet 2 Oct- 3, 1933- J. c. MARTIN, JR

LOCOMOTIVE BOILER 4 Sheets-Sheet 3 Filed OCT.. 16. 1931 Zwen i0 Ot- 3, 1933- J. c. MARTIN, JR

LOCOMOTIVE BOILER 4 Sheets-Sheet 4 Filed Oct. 16, 1931 Patented Oct. 3, 1933 UNITED STATES PATENT OFFICE s Claims.

The invention relates to boilers, particularly locomotive boilers, and has as an object the provision of means for attaching tubular elements to the sheets of the boiler in such manner that the strain between the elementsl and the boiler sheets as occasioned by the heat of combustion will be borne by the outside or wrapper sheet of the rebox. Y

`It is a further object of the invention to provide a structure for the attachment of tubular elements to boiler sheets utilizing staybolts between the wrapper sheet surrounding the f1rebox and the ends of the elements as extended beyond the sheets forming the rebox, to take the strains which tend to separate the elements from the sheets.

It is a further object of the invention to provide a means for connecting tubular elements to the sheets of the firebox of a boiler wherein the rebox sheet has a positive bearing upon the walls of the element to support the edges of the opening through which the element projects into the water space of the boiler, while forming an abutment for the element end against the firebox sheet, and also provide means for taking up the strain tending to separate the element from the sheets by means of staybolts transmitting the strain to the Wrapper sheet.

It is a further object of the invention to provide a connectionl for tubular elements to firebox and wrapper sheets of the boiler which shall be simple to install and wherein the strain-receiving elements will not be exposed to the heat of the rebox.

It is a further object of the invention to provide a novel water bottom for a locomotive Iirebox.

Further objects of the `invention will appear from the following description when read in con- Fig. 4" is a detail perspective view showing a portion of the water bottom of the invention ;l Fig. 5 is a detail horizontal view partly in plan and broken away to reduceits lengthvshowing one of the tubular elements of the water bottom atnection with the accompanying drawings showtached to the sheets of the boiler in accordance with the invention;

Fig. 6 is a vertical section on line 6--6 of Fig. 5;

Fig. 7 is a detail vertical section with a portion 60 broken away'online 7-7 ofy Fig. 8;

Fig. 8 is a section von line 8-'8 of Fig. 7;

Fig.A 9 is a face View partly broken away of the attaching means of Figs. 5 to 8 inclusive;

Fig. 10 is a face view of the connection of the 65 lower end of the tubular element to the-header of Figs. 5 to 8 inclusive;

Fig. 11 is a detail view corresponding to a portion of Fig. 5 showing a modied form of staybolt connection;

Fig. 12 is a face view partly broken away of the wrapper sheet of Fig. 11;

Fig. 13 is a detail section on line 13-13 of Fig.

Fig. 14 is adetail vertical section of an end of 75 a tubular element showing a portion of a iirebox sheet with the lapped ends of the element walls riveted instead of weldedas shown in Fig. 8;

Fig. 15 is a View corresponding to a portion o Fig. 8 showing a further modification;

Fig. 16 isa vertical section on line 16--16 of Fig. 15; Y

Fig. 17 is a. detail section on line 17-17 of Fig.

Fig. 18 is a section on line 18-18 ofFig. 17;

Figs. 19 and 20 are detail perspective views from the inside of the flrebox showing further modiied `forms of attachment ofthe vtubular elements to the rebox sheet; and

Figs. 21 and 22'are detail vertical sections of 90 the ends of the tubular elements showing portions of the Iirebox sheet and illustrating further modied Vforms of the ends of the tubular elements. v

As shown in Figs. 1 to 4 inclusive, the firebox 95 to whichv the invention'is applied comprises a llame space 10, a crown sheet 11, a Wrapper sheet 12, inside side sheets 13, anda mudA ring 15.

The illustrative embodiments of the invention show its application to locomotive boilers fired with injected fuel through burner 16 entering the firebox through opening 17 in the' usual mannel'.

The novel water bottom provided by the invention is shown as comprising header means'shown 105 as spaced tubular elements 18, and upwardly andV outwardly sloping tubular elements 19. The elements 19 are shown as attached to and having their interiors opening into the header means 18. For suchattachment the elements 19 are shown 110 t tion in any of its various embodiments.

as passing into openings in the walls of the header means 18, the joint being sealed by welding as at 20. To receive strain tending to separate the elements from the header, the ends of the elements are shown as cut away at 21, Fig. l, to provide extending plate-like members 22, the ends of said members passing through slots in the opposite wall of the header means and being clinched on the exterior thereof as shown at 23, the joint being sealed by welding as shown at 24. A

To support refractory material in the space between'the header means 18, there is shown a horizontal plate 25 spanning the space between the headers and having its ends upwardly turned as at 26, the upwardly turned portion being welded l to the walls of the headers as at 27.

Between the separate elements and iiush with the lower Walls thereof, there are shown further plates 28 desirably welded to the walls of the elements and

refractory material

29, 30 is provided to fill the spaces between the headers and between the tubular elements. The closure of the bottom of the firebox is completed by means of refractory end walls 31, 32.

Desirably end plates 33, 34 are provided through which the ends of the headers pass and which rigidly support the ends of the headers in correct spacing and assist in confining the refractory material. Anl air inlet box is shown atv 35 in accordance with the usual practice.

The ends of the separate elements 19 may be secured to the side sheets of the boiler in accordance with the structure provided by the inven- While this structure for attaching tubular elements to the sheets of the flrebox are shown herein as applied to the novel water bottom provided by the present invention, it will be understood that this structure is applicable wherever tubular elements 40 forming a portion of the circulatory and steaming system in the boiler are provided opening through lthe inside sheets of the boiler, whether the sheets are the side sheets and wrapper sheet or the crown sheetand wrapper sheets of the boiler` The showing of this connection in Fig. 2 is somewhat diagrammatic and for detail illustration of various embodimentsof this feature of the invention attention is directed to Figs. 5 to 22 inclusive.

In the form of Figs. 5 and 6 the tubular element A19, which is shown as flattened and formed with rounded edges desirably produced by bending a flat plate and joining the edges thereof by welding as indicated at 36, are passed through an opening 37 inthe flrebox sheet 13,'the joint being sealed by welding as at 38. The end of the element projecting into the side water leg is cut away to provide

plate portions

39, 40, which portions are bent to overlapping position as shown in Fig. 6 and perforated at their overlapped portion as shown at 41 for engagement by key-headed staybolt 42. The'staybolt passes through the wrapper sheet 12 and has screw-threaded engagement with a nut '43, the lower. surface of which is formed upon the portion of'a surface of a sphere to provide flexible bearing upon the edge of the opening in the wrapper sheet.

The 'nut 43 is shown as provided with projecting lugs 44 desirably Welded to the outside surface wrapper sheet to prevent unscrewing thereof.

In application of this form of the invention, as well as each ofthe other forms illustrated, to

lexisting boilers the already existing staybolt holes in the wrapper sheet may be utilized and the spacing of the staybolts engaging the ends of the .Figs 21 and 22.

tubular elements will be correct to receive staybolts projecting through the existing openings, thus very greatly simplifying the application of the invention.

In the form of Figs. 7 and 8, the rounded ends of elements 19 inside the water leg space is cut away as shown at 45 and the resulting plate portions 46, 47 are bent intooverlapping position and provided with internally screw-threaded openings for engagement with the staybolts 48. In this form of the invention openings 49 are provided in the projecting plate portions for circulatory communication between the interior of the tubular element and the water leg. Also the staybolts 48 areshown as passing through and having flexible bearing in externally threaded sleeves 50 which in turn are screwed into openings in the'wrapper sheet and asealing cap 51 is applied over the ends of the staybolts which are shown as slotted for engagement with an applying tool in the nature of a screwdriver.

In the form of Figs. 11, 12, and 13 the plate portions of the end elements 19 are merely projecting into the water leg in spaced relation and opposite perforations 52 are provided for engage- 52, the nut 44 securing the staybolt beingof the 105 form shown in Figs. 5, 6, and 9,

Fig. 14 shows the ends of the

plate portions

47, 48 overlapped and secured together by rivets 70, the overlapped ends being provided with a tapped opening for a staybolt connection. f

To support the long edges of the perforation in the rebox sheet 13 and to provide a distancing stop for the end of the element 19 thereagainst as shown in the form of Figs. 15 to 21 inclusive, a shoulder is provided upon the wall of the elements 19 by inwardly deforming the end of the element where it enters the opening in the firebox sheet and the opening in the sheet is designed to flt the exterior of the element as modified by the presence of the shoulder.

In the form of Figs. 15 and 16, the rounded edges of the element project through the opening, while the substantially plain side walls of the element are Yinwardly deformed as at 55 to provide shoulders 56 against which the edges 57 of the opening in the sheet may bear. In this form .of the invention the inwardly turned and overlapping ends of the plate-like portions of the element are secured together by screw-threaded members 58 for which rivets may be substitutedv if desired and the staybolts 59 are shown as engaging screwthreaded openings in the overlapped ends, flexible staybolts being illustrated in this as in other forms.

The openings 49. are alsor shown in each of Figs. 15 to 22 for thepurpose already described.

In the form of Figs. 17 and 18, the shoulders 56 are formed ina plane inwardly spaced from the plane of the side sheet and the edge of the opening in the side sheet'is inwardly flared as at 60 so as to bear at its edge upon the said shoulder, while the rounded edges of the element are outwardly flared, as at 61, to join the edge of the opening in the side sheet by a butt weld 62.

The perspective view of Fig..19 illustrates the form of Figs. 15 and 16, and of Fig. 20 illustrates the form of Figs. 17 and 18.

Modified forms of element ends are shown in In Fig. 21, one of the plate ends, at 63, is bent to provide a butt weld engagement at 64 with the other plate projection of the element and a threaded opening 65 is provided for staybolt connection in the arc thus formed. Fig. 22 is similar but the end 66 of the one plate overlaps the end 67 of the other plate and is riveted thereto as shown at 68.

By the structure of the tubular element` connection, the necessity of forming extensive flanges upon the end of the tubular element is avoided. Any extensive perforating of the firebox and wrapper sheets for flanges and supporting staybolts therefor is also avoided and a staybolt connection is provided whereby the strain between the tubular element and the sheets of the rebox is borne through such staybolt connection directly by the wrapper sheet out of influence of the intense heat of the iirebox.

Minor changes may be made in the physical embodiments of the invention within the scope of the appended claims without departing from the spirit thereof.

I claim:

1. A boiler structure comprising, in combination, spaced firebox and Wrapper sheets, a tubular element directly exposed to heat in the frebox, having its walls sealed to the edges of an opening in the rebox sheet and opening into the space between said sheets, a portion of said walls extending into and terminating in the space between said sheets, said termination provided with a staybolt connection and a staybolt passing through the wrapper sheet and engaging said connection. l

2. A boiler structure comprising, in combination, spaced firebox and wrapper sheets, a tubular element directly exposed to heat in the firebox and opening into said space, the walls of said element sealed to the edges of an opening in the firebox sheet, opposite portions of said walls extending into said space, Vone of said portions bent across the space between said portions and secured to the opposite portion to form a yoke, a stayboltgconnection carried by said yoke and a staybolt passing through said wrapper sheet and engaging said connection.

3. A boiler structure comprising, in combination, spaced firebox and wrapper sheets, a tubular velement directly exposed to heat in the rebox and opening into said space, the walls of said element sealed to the edges of an opening in the rebox sheets, opposite portions of said walls extending into said space, said parts-turned to overlapping relation to form a double thickness yoke, said yoke provided Witha tapped opening to form a threaded staybolt connection, and a threaded staybolt passing through said wrapper sheet and engaged in said connection.

4. A boiler structure comprising in combination, spaced frebox and wrapper sheets, a tubular steaming and circulating element exposed to heat within the firebox and opening into the space between said sheets, said element having its full tubular wall sealed to the edges of an opening in the ilrebox sheet and a part of its tubular wall extending through said opening and terminating between said sheets, said termination connected by staybolts to the wrapper sheet.

5. A boiler structure comprising in combination, spaced firebox and Wrapper sheets, a tubular steaming and circulating element exposed to heat within the rebox and opening into the space between said sheets, said element having its full tubular Wall sealed to an opening in the iirebox sheets and having parts of its tubular wall projectingV beyond said opening and connected by strain-resisting bolts to the wrapper sheet.

6. In a boiler structure: spaced rebox and wrapper sheets; a tubular steaming and circulating element exposed to heat in the rebox having its walls sealed to the edges of an opening in the rebox sheet; said walls terminating in the space between said sheets; means not exposed to heat in the rebox for securing the element end to the wrapper sheet comprising: an opening for a bolt in the terminating portion of said walls, and a bolt engaging said opening securing the element walls to the wrapper sheet. V

'7. In a boiler structure: spaced firebox and wrapper sheets; a tubular steaming and circulating element exposed to heat in the rebox having its walls sealed to the edges of an opening in the rebox sheet; said walls terminating in the space between said sheets; means for holding the walls of said element in said opening comprising: a perforation in said terminating portion thereof threaded for a staybolt, and a threaded staybolt passing through the wrapper sheet engaging the threads of said perforation.

8. In a boiler structure: spaced iirebox and wrapper sheets; a tubular steaming and circulating element exposed to heat in the firebox having its walls sealed to the edges of an opening in the firebox sheet; said walls terminating in the space between said sheets and said terminating portion having surfaces adapted for a staybolt connection; a staybolt passing through the wrapper sheet engaging said surfaces; and means for tightening said staybolt against the wrapper sheet and said surfaces.

JESSE C. MARTIN, JR.