US1135422A - Superheater. - Google Patents

Description

C. D. YOUNG SUPERHEATER.

APPLICATION FILED DEC-13, 191a.

Ru 1 9 1 00 1 v. p A a Du t n m a P 2 SHEETS-31131 1.

C. D. YOUNG.

SUPERHEATER.

APPLICATION FILED DEC.I3, 1913.

Patented Apr. 13, 1915.

2 SHEETS-SHEET 2.

SUPERHEATIER.

Specification of Letters Patent.

Application filed December 13, 1913. Serial No. 806,382.-

To all whom it may concern Be it known that l[, 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 usefullmprovements in Superheaters,

' of which the following is a specification.

tit the header 8 and the other in communication The invention relates to superheaters; and has for its primary objects, the 'provision of an improved arrangement of tubes and cooperating parts whereby any tube may be removed for replacement or repair without disturbing other tubes; and the provision ofimproved supporting and connecting means for the lengths of superheater tubes located in the fire tubes whereby the spaces between the tubes may be conveni'ently relieved of cinder and other foreign matter which collects and wedges into such spaces and reduces the heat absorbing capacity of the tubes. One embodiment of the invention is illustrated in the accompanying drawings, wherein Fig. 1 is a longitudinal section taken through the front end of a locomotive provided with my improvement, the section being on the line II of Fig. 2, Fig. 2 is a half section taken transversely through the smoke boX of the locomotive and showing the superheater in end elevation, Figs. 3 and 1 are enlarged details of the means for connecting the superheater tubes with the headerS, Fig. 3 being a plan view and Fig. 4 a side elevation, and Fig. 5 is an enlarged section throughone of the tire tubes and the superheater tube carried thereby, and shows the means for securing the lengths of superheater tubes in their proper relative positions.

Referring first to the arrangement shown in Figs. 1 and 2, 1 is the boiler of the locomotive provided with the usual dry pipe 2 and the vertical rows of fire tubes or fiues 3, 4, 5, and 6 (Fig. 2) 7 is a casting divided into two main headers or header chambers 8 and 9; 10 is one of the two outlet pipes leading from the header 9 to one of the cylinders of the engine, and 11, 12, 13, 14, and 15 are the superheater tubes, each of which has one end in communication with *or sub-chamber 16 which in turn communiwith which these tube ends communicate is' another row of holes which communicate with another pocket or sub-chamber 17 divided from the pocket 16 by the wall 18 (see Fig. 2), and it is with this second row of holes that the other ends of the superheater tubes communicate, the arrangement being suchthat the two ends of each tube are alongside of each other. The chamber 17 with which the other ends of the tubes communicate is in communication with the other superheater header or chamber 9, proper division walls being provided so that the alternate sub-chambers or pockets communicate with the same header. This arrangement of pockets is well known in the art and will be readily understood without further description In the portion of the structure shown in Fig. 2 the alternate pockets 16 and 19 communicate with the header 8 which receives the saturated steam, while theother pockets 17 and 20 communicate with the header 9 to which the super- 1 heated steam is supplied by the superheater tubes. It will thus be seen that each of the superheater tubes is in communication at one end with the saturated steam header 8, and at its other end with the superheater steam header 9.

The manner in which each pair of tube ends is secured in communication with the perforations or passages in the bottoms of the two headers will be readily understood by reference to Figs. 3 and 4:. The tube sections 21 and 22 constitute the ends of the same superheater pipe, and each end is upset as indicated at 23 and 24-, and has a beveled portion 25 which is ground to make a tight fit with a corresponding surface in the bottom of the header. Mounted upon the tube ends 21 and 22 are the clamping blocks 26 and 27. These blocksare provided with interlocking hook portions 28 and 29 which prevent the separation of the blocks and at the same time permit the blocks to be disengaged by a relative backward or forward movement. As indicated in dotted lines, the blocks fit with a considerable degree of looseness upon the tube ends, for a purpose to be hereinafter pointed out. The two blocks are clamped in position against the underside of the headers,

engages a key slot 31 extending across the Patented apr. is, rats.

- purpose of this is to permit the more ready removal of the superheater tube lying just above. F or instance the tube ends 33 and 31 (Fig. 2) by their divergence avoid interference with the superheater tube ll lying thereabove, and in fact avoids interference with the removal of any of the superheater tubes lying thereabove.

The foregoing arrangement, including the divergence of the tubes and the use of the blocks detachably-secured together permits of the removal of any superheater tube in the system-without the necessity of loosening or removing any of the other superheater tubes. The manner in which this may be accomplished will now be described. If it is desired to remove the bottom tube 15 lying in the fire tube 5 (Figs. 1 and 2), the nut on the bolt 30 is first unscrewed (Fig. 4:) and the two blocks 26 and 27 are slid downward until the blocks are entirely free from the clamping bolt 30. This can easily be accomplished because of the looseness of the fit of the blocks with respect to the tube ends. After the two blocks have been slipped down to a point below the securing bolt and below the adjacent securing blocks, one block is pulled forward and the other moved to the rear until the parts 28 and 29 are unhooked. The blocks are then free to move apart, and the tube carrying the two blocks can be sprung sufliciently so that these blocks clear the ends of the tubes lying in front of them. At this time the upper ends of the tube 15 (Fig. 2) will occupy the spaces 35 and 36between the vertical rows of fire tubes, and the entire tube can then be moved forward, thus disengaging the portion of the tube lying in the fire tube. The same operation is repeated in removing any of the other superheater tubes, with the exception of the tubes 1]. lying in the upper fire tubes, such tubes being removable without disengaging the blocks or without springing the tubes, since .there are no tube ends in front of such upper superheater tubes 11.

Another feature of my invention consists in the means for supporting and spacing the tube lengths in the fire tubes. By reference to Fig. 5 it will be noted that the four tube lengths 37, 38, 39 and 40 lying in the fire tube 5 are engaged by the strap iron members 41 and 42. The member 41 partially encircles the outer sides of the pipes and is provided with two pair of projections 43 and 4A engaging the inner wall of the fire tube and serving to hold the lengths in proper position with respect to the fire tube.

The member 42 engages the inner side of the tube length and is secured to the member a l by means of the rivets 45. The advantage in this arrangement resides in the fact that the spaces 46 and t? between and below the tubes are substantially unobstructed, thus permitting the ready insertion of a cleaning tool 48 indicated in dotted lines. The spaces between and below the tubes can therefore be very easily and effectively relieved of cinder, and the super-heater tubes maintained at their greatest efiiciency in so far as the absorption of heat is concerned.

hat I claim is:

1. The combination in a boiler having fire tubes, of a superheater having a pair of headers, 21 superheater tube having its ends connected to the headers and comprising four lengths of tube lying in a fire tube, and. a band of strap metal encircling the two upper lengths of tube and the lower lengths of tube with the exception of the inner sides thereto which are left free, and also engaging the wall of the fire tube on opposite sides of its vertical center line whereby the vertical space between the tubes and below the tubes is left unobstructed for the passage of a cleaning tool.

2. The combination in a boiler having fire tubes, of a superheater having a pair of headers, a superheater tube having its ends connected to the headers and comprising four lengths of tube lying in a fire tube, a band of strap metal encircling the outer sides of all four lengths of tube and engaging the wall of the fire tube, leaving th inner sides free, another band encircling the inner sides of the said lengths but with its ends engaging the lower lengths of tubes spaced apart to permit the passage of a cleaning tool, and means connecting the two bands.

3. The combination in a boiler having fire tubes, a pair of superheater headers above one of the fire tubes and having passages through their lower walls, a superheater tube lying in the fire tube and having its two ends upturned, a clamping block carried by each tube end, means whereby the two blocks are secured detachably together, and means for clamping the blocks against the bottoms of the said headers with one tube end in communication with one header and the other tube end in communication with the other header.

4. The combination in a boiler having fire tubes, a pair of superheater headers above one of the fire tubes and having passages through their lower walls, a superheater tube lying in the fire tube and having its two ends upturned, a clamping block carried by each tube end, means whereby the two blocks are secured detachably together, and a bolt lying between the tubes for clampin both blocks against the bottoms of the sai headmes es ers with one tube end in communication with one header and the other tube end in communication with the other header.

5. The combination in a boiler having fire tubes, a pair of superheater headers above one of the fire tubes and having passages through their lower walls, a superheater tube lying in the fire tube and having its two ends upturned, a clamping block carried by each tube end, interlocking means on the blocks for preventing their relative movement away from each other, but permitting their disengagement by a relative backward or forward movement, and means for clamping the blocks against the bottoms of the said headers with one tube end in communication with 7 one header and the other tube end in communication with the other header.

6. The combination in a boiler having fire tubes, a pair of superheater headers above one of the fire tubes and having passages through their lower walls, a superheater tube lying in the fire tube and having its two ends upturned, a clamping block mounted loosely upon each tube end and movable freely downward thereon, means whereby the two blocks are secured detachably together, and means for clamping the blocks against the bottoms of the said headers with one tube end in communication with one header and the other tube end in communication with the other header.

7. The combinationin a boiler having fire tubes, a pair of superheater headers above one of the fire tubes and having passages through their lower walls, a superheater tube lying in the fire tube and having its two ends upturned, a clamping block mounted loosely upon each tube end and movable freely downward thereon, interlocking means on the blocks preventing their relative movement away from each other, but permitting their disengagement by a relative backward or forward movement, and means for clamping the blocks against the bottoms of the said headers with one tube end in communication with one header and the other tube end in communication with the other header.

8. The combination'in a boiler having a vertical row' of fire tubes, a pair of superheater headers above the said row of fire tubes having a row of passages through the bottom of each header with the said rows of passages alongside each other, a superheater tube in each fire tube with its outer ends turned up and spread apart to form a V, aclamping block carried by each tube end, means for detachably securing the blocks carried by the ends of the same tubes together, and means for clamping the blocks to the bottoms of the headers with the ends of the tubes in communication with the said passages through the bottoms of the headers.

9. The combination in a boiler having a vertical row of fire tubes, a pair of superheater headers above the said row of fire tubes having a row of passages through the bottom of each header with the said rows of passages alongside each other, a superheater tube in each fire tube with its outer ends turned up, and means for detachably securing the said ends in communication with the said passages in the bottoms of the headers with the ends of the same tube alongside each other and with one end communicating with one header and the other end with the other header, the ends of the upper superheater tube communicating with the outer pair of passages and the ends of the next lower superheater tube communicating with the pair of passages next to the outer pair and straddling the outer portions of the said upper superheater tube.

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

' CHARLES D. YOUNG.

Witnesses:

S. E. GEARHART, OTrro 18. Human.

Images