US1763140A - Locomotive water-tube boiler - Google Patents

Description

Julie 10, 1930. M R 1,763,140

LOCOMOTIVE WATER TUBE BOILER Filed Sept. 20, 1928 ZSheets-Sheet 1 June 10, 193 0. EMERSON 1,753,140

LOCOMOTIVE WATER TUBE BOILER Filed Sept. 20, 1928 2.Sheets-Sheet 2 /G. 5 A? A? Patented June 10, 1930 GEORGE E. EMERSON, OF BALTIMORE, MARYLAND LOCOMOTIVE WATER-TUBE BOILER Application filed September 20, 1928. Serial No. 307,155.

In some water tube boilers there is an elbow connection between the bottom of the boiler shell and the front end of the fire box water frame, through which water is furnished for the fire box tubes. Due to the fact that the opening to the elbow is approximately 30" in front of the back flue sheet there is formed a pocket, or space, where the circulation is relatively slow, so that there is a constant precipitation of mud and other solid matter, which builds up around the lower fiues and in the bottom radius of the back flue sheet, and if not constantly cleaned results in mud burning of the flue sheet.

The object of the present invention is to overcome this objection by turning up the front mud ring casting for a suitable distance to engage a flanged extension of the back tube sheet and a throat sheet attached to the rear end of the boiler shell. 7

This connection eliminates two fiat flange connections used in previous designs, and at the same time eliminates the sediment pocket as the circulation is directly from the end of the boiler'course into the-front mud ring or water bar frame.

In the drawings: Figure 1 is a front elevation of the back flue sheet and front mudring casting embodying my invention.

Figure 2 is a detail sectional view on the line 22, Figure 1, looking in thedirection of the arrows. Figure 3 is a detail sectional view on the 3 line 33, Figure 1.

Figure 4 is a front elevation of the'throat sheet.

Figure 5 is a bottom edge view of the back tube sheet.

Figure 6 is a top plan view of the throat sheet. Y 7

The reference number 7 designates the back tube sheet which is different from the tube sheets heretofore employed in that it has at its bottom a downward extension or apron 8, the side edge portions of said extension being flanged or bent to form flanges 9 which join the flue sheet with the shell of the boiler, said flanges being on the outside of the shell.

The front mud ring 10 for a suitable distance at the center is turned up in the form of an extension 11 to engage the back tube sheet extension 8, and the throat sheet 12 vihiih is attached to the rear end of the boiler s e1 The flat surface of the extension 8 affords a suitable space into which to enter the arch tube, or tubes, when used, in the openings 16. 15 designates other arch tubes.

The throat sheet 12 is shown detached in Figures .4 and 6 and is provided with the flange 14 conforming to the contour of the boiler shell, and with flanges 13 which lap the flanges 9 of the extension 8. Rivets, or threaded plugs, 15 secure the throat sheet 12, extension 11 of the mud ring, and the extension 8 of the back tube sheet firmly together.

What I claim is:

1. In a water tube boiler, a back tube sheet having a downwardly depending apron at its lower edge, a forwardly extending flange at each side edge of saidapron, a front mud ring having an upwardly extending tubular like extension approximately midway its ends, a throat sheet having rearwardly extending flanges at its side edges adapted to underlap the side flanges of the apron, said tube like extension of the said mud ring entirely surrounded by said throat sheet and tube sheet and secured thereto.

2. In a water tube boiler, a back tube sheet, a throat sheet, and a front mud ring provided with an upwardly extending tubular like extension approximately midway between its ends, said tube sheet and throat sheet having extensions conj ointly forming an enclosure about said tubular-like extension of the mud ring and secured thereto.

3. In a water tube boiler, a back tube sheet having an extension, a mud ring having a tubular projection, and a throat sheet having an extension, the extensions of the tube sheet and throat sheet being arranged to embrace the tubular projection of the mud ring and secured thereto.

4. In a water tube boiler, a back tube sheet having a downwardlydepending apronprovided with arch tube receiving openings, arch tubes fitted in said openings, a mud ring pro- 4 vided with a tubular projection, and a throat sheet having an extension, the said apron of the back tube sheet and the extension of the throat sheet being arranged to embrace the tubular projection of the mud ring and secured thereto.

5. In a water tube boiler, a back tube sheet havin a downwardly depending extension, a front mud ring having an upwardly extending tubular-like projection approximately midway its ends, and a throat sheet having rearwardly extending flanges at its side edges, the extension of the back tube sheet and the flanges or" the throat sheet being arranged in lapped relation and forming an enclosure for the tubular projection of the mud ring.

6. In a water tube boiler, a back tube sheet, a throat sheet, and a front niud ring having a tubular projection, the back tube sheet and the throat sheet having portions folded about said tubular projection of the mud ring and arranged in lapping relation to provide an enclosure for and secured to said tubular projection.

7. In a water tube boiler, a back tube sheet having a downwardly depending apron at its lower edge, a forwardly extending flange at each side edge of said apron, a front niud ring having an upwardly extending tubular-like projection approximately midway its ends, a throat sheet having a flange conforming to the contour of the boiler shell and secured thereto, and provided with other flanges, the

flanges of the back tube sheet apron and the second-named flanges of the throat sheet being arranged to overlap and surround the tubular-like projection of the mud ring and secured thereto.

In testimony whereof I aflix my signature.

GEORGE H. EMERSON.

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