US1288364A - Superheater. - Google Patents

Description

C. D. YOUNG.

SUFEHHEATER.

APNIC/111011 man ,1l/111.111.1914.

1,288,364, v f Patent-911 Dec. 17, 1918.

ED STATES Maur onion.

SUPERHEATER.

Specification of Letters Patent.

Patented Dec. 17, 1918.

Application filed March 19, 1914. Serial No. 825,731.

To all whom t may concern Be it known that I, CHARLES D. YOUNG, a citizen of the United States, residing at Altoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Superheaters, of which the following is a specification.

The invention relates to superheaters particularly designed for use in locomotives, traction engines, and the like. l: has for its primary object; the provision of an improved header construction wherein the dry pipe may lbe removed without interference by the usual partition wall; and wherein the said partition wall acts as a stay for the front wall of the header; and the provision of improved and simplified piping connections from the header to the engine cylinders. One embodiment of the invention is shown in the accompanying drawing, wherein- Figure 1 is a longitudinal section through the smoke box of a locomotive containing my improved superheater, such section being taken on the line 1 1 of Fig. 2, Fig. 2 is a transverse half section through the smoke box at the forward end oi" the superheater, and shows such superheater in front elevation with a portion of the front wall broken away, and Fig. 3 is a detail section on the line III-HI of Fig. 2.

Referring to the drawings; 1 is the smoke box of a locomotive; 2 is the boiler carrying the usual dry pipe 3 leading from the steam dome; 4:, 5, 6, and 'l' are the tire tubes in which lie the superheater tubes 8, 9, 10, and 11; 12 and 13 are the upper and lower superheater chambers respectively, and 14 is the stack of the locomotive.

The walls of the chambers 12 and 13 con sist of the top plate 15 (Fig. 2) forming a part of the smoke box wall, the back plate 16 which is a port-ion of the line sheet, the front plate 17, the bottom plate 18, and the partitionV plate or wall 19 which separates the upper chamber 12 from the lower chamber 13. The plate 19 acts as a stay for the front plate 17, and such front plate is provided with an opening closed by the cover plate 20. This permits the removal and replacement of the dry pipe 3. The arrangeA ment involving the use of the horizontal partition plate 19 over the use of a vertical plate resides not only in the function of such plate as a stay for the front wall, but in the fact that the plate is gotten out of the way of the dry pipe, it being necessary with a vertical partition plate to provide an opening therethrough for the passage of the dry pipe and a cover plate for such opening.

One end 20 of each of the superheater pipes is expanded into the lower plate 18 and communicates with the lower chamber 13, whileV the other end 21 extends through the lower plate 18 and the lower chamber, and h as its extremity expanded into the partit1on plate 19 so that such end communicates with the upper chamber 12. In order to make the end 21 tight where it passes the plate 18 the tube is expanded just above and Vbelow such plates as indicated most clearly in Fig. 2. In order to give access yto the tube ends 2O for expanding or cutting out, openings through the partition 19 are provided, which Openings are closed by removable screw plugs 22 (Fig. 2). Access is given to the plate 19 and the tube ends therein .and therebeneath, by means of the hand holes in the top plate 15 closed by the removable cover plates 23 placed at suitable intervals.

The smoke box walls are cut away at the ends of the chamber 13 as indicated at 24 (Fig. 2), and the bottom and partition plates 18 and 19 are flanged and riveted to the smoke box wall as indicated at 25 and 26 (Fig. 2). Riveted to the wall of the smoke box on each side is a shell 26 of sheet metal preferably covered with asbestos' and communicating at its upper end with the chamber 13. rlhe wall of the smoke box is thus made to constitute a side of the passage way for conducting steam from the chamber 13 to the valve chest and thence to the cylinder of the engine. A casting 27 at the lower end of the shell 26 is coupled to the casting 2S on the valve chest by means of the member' 29, a packing ring` 80 and ground joint 31 being employed, although any desired connect-ion might be employed. rlhis arrangement involving the shell 26 is advantageous, as the placing` of the passageway on the outside leaves more room in the smoke box and avoids interferences with iiues and superheater tubes. The construction is simple and inexpensive and affords a most direct connection between the superheater chamber and the steam cylinders, and one without a multiplicity of objectionable bends. The passageway is further not cooled to the same extent as the ordinary outside pipe, since one side is ormed by the smoke box wall which is relatively hot. @ther advantages will be apparent to those skilled in the art.

In operation saturated steam from the dome flows through the dry pipe 3 and into the chamber 12, thence into the ends of the superheater tubes expanded into the partition sheet 19. After passing through the lengths of tubes 8, 9, 10, and 11 lying in the lire tubes, the supcrheated steam Hows into the chamber 13, passing transversely through this chamber to the shells Q6 and thence to the steam cylinders of the engine.

What claim is:

1. In combination with a boiler having fire tubes and a dry pipe leadinO through the flue sheet thereabove, a header having a rear wall constituting a part of the said iue sheet through which the dry pipe leads and having a front wall with an opening opposite the end of the dry pipe, a removable cover plate for such opening, a sub stantially horizontal partition wall lying below the dry pipe and dividing the header into an upper and a lower chamber, and superheater tubes lying in the iire tubes and each having one end leading into the lower chamber and the other end extended through such lower chamber and the partition wall and communicating with the said upper chamber.

2. In combination with a boiler having iire tubes and a dry pipe leading through the fine sheet thereabove, a header having a rear wall constituting a part oithe said flue sheet through which the dry pipe leads and having a front wall with an opening` opposite the end of the dry pipe, a removable cover plate for such opening, a substantially horizontal partition wall lying below the dry pipe and dividing the header into an upper and a lower chamber, with the neseee said lower chamber opening through the smoke-box walls, superheater tubes lying 1n the fire tubes and each having one end lead-` ing into the lower chamber and the other end extended through such lower chamber and the partition wall and communicating with the said upper chamber, and outlet pipes lying' outside the smoke-box and leading from the ends of the lower chamber.

3. in combination with a locomotive vhaving hre tubes, and a smoke box at its front end with 'the opposite sides of such smoke box provided with openings, of a super heater in the smoke box comprising two chambers, lone of which is open at its ends in alinement vwith the Lopenings through the walls of the smoke box, and a `passage leading from each of said ends to a locomotive cylinder and having as a part of its wall the wall of the smoke box.

4. 1n combina-tion with a locomotive having iire tubes and a smoke box at its front end with the opposite sides of such smoke box provided with openings, of a superheater in the smoke box Comprising two chambers, one of which is open at its ends in alinement with the openings through the walls oi' the smoke box, and passages lying on the outside of the smoke box and leading :troni the said ends of the chamber to the cylinders of the engine, the said lpassages being shells open on their inner sides and secured against the smoke box walls, so that such walls constitute the inner sides of the said passages.

in testimony whereoil I have hereunto signed my name in the presence of the two subscribed witnesses.

CHARLES D. YOUNG.

Witnesses S. E. Greer-mnu?, J. T. HANLON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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