US1977637A

US1977637A - Boiler superheater support

Info

Publication number: US1977637A
Application number: US433021A
Authority: US
Inventors: Howard J Kerr; William A Jones
Original assignee: Babcock and Wilcox Co
Current assignee: Babcock and Wilcox Co
Priority date: 1930-03-04
Filing date: 1930-03-04
Publication date: 1934-10-23
Anticipated expiration: 1951-10-23

Description

Oct. 23, 1934. H, J KERR r AL 1,977,637

BOILER SUPERHEATER SUPPORT Filed March 4, 1930 3 Sheets-Sheet l Fig f] MfiNVENTORS W 5W ATTORNEY Oct. 23, 1934. H, J, KERR El AL BOILER SUPERHEATER SUPPORT Filed March 1930 Sheets-Sheet 2 Oct. 23, 1934. J E r AL 1,977,637

BOILER SUPERHEATER suPPor i'r Filed March 4, 1930 I 3 Sheets-Sheet 3 Patented Oct. 23, 1934 1,977,637

UNITED STATES PATENT OFFICE 1,071,037 I nornsa surcanas'raa surroa'r Howard J. Kerr, Westfleld, N. J., and William A. Jones, Westerleigh, N. Y., asaignors to The Babcock & Wilcox Company, Bayonne, N. 1., a corporation of New Jersey Application March 4, 1930, Serial No. 433,021

x 10 Claims. (Cl. 122478) This invention relates to a boiler of the Bab- Due to the fact that the outlet header of the cock.& Wilcox type having a superheater supsuperheater reaches a higher temperature than ported upon the bank of inclined tubes with the inlet header, this header expands more than provision to permit the superheater tubes that the inlet header, so that if the upper row of tubes 6 are connected with the superheater outlet header 10 were to be immovably supported, the portions 50 to move laterally when this header expands and of these tubes between the support and the supercontracts. heater header 11 would be subjected to consider- The invention will be understood from the deable flexure with the danger of loosening these scription in connection with the accompanying tubes in the header. By the present invention,

10 drawings in which Fig. 1 is a vertical section provision is made for permitting these portions 65 through an illustrative embodiment of the inof the tubes 10 to move with the header 11, thus vention; Fig. 2 is a similar section through a distributing the flexure over long distances along modification; Fig. 3 is a section along the line the tubes. One. of the ways of providing this 3-3 of Fig. 4; Fig. 4 is a section along the line feature is indicated in Figs. 3 and 4 in which a 15 4-4 of Fig. 3; Fig. 5 is a section along the line portion 17 of the support that is located near the 7 -5 of Fig. 6; Fig. 6 is a section along the line superheater headers through which the upper- 6-6 of Fig. 5; Fig. 7 is a section along the line most portions of the rows of tubes pass is made 7-7 of Fig. 8; and Fig. 8 is a section along the in sections and is movable horizontally with reline 8-8 of Fig. 7. spect to the remainder of the support or baflle 12.

In the drawings, reference character 1 indicates The portion 17 is made of sections or strips of 76 the steam and water drum of the boiler, the water plate metal that are connected by means of bolts space of which is connected by means of the nip- 17' to the remainder oi the support both along ples 2 to the upper ends of the downtake headers the upper and lower edges of the sections 17 that 3. Abank of inclined tubes4connects the headers pass through holes 18 in the support 12 that are 3 to the uptake headers 5, and the upper ends elongated horizontally so as to permit movement of the uptake headers 5 are connected by means of the sections or portions 17 horizontally with of the circulating tubes 6 to the steam space of respect to the remainder of the support. The the steam and waterdruml. The uptake headers holes 19 in the sections 17 through which the 5 are supported by means of supporting rods (that tubes 10 pass may be made slightly larger than 30 may be connected to supports 7' outside of the the tubes 10.

boiler setting. Another way of providing for the lateral move- A pipe 8 leads from the steam space of the ment of the upper portions of the tubes 10 is steam and water drum 1 to the superheater inlet illustrated in Figs. 5 and 6, that is suitable when header 9 that is located above the upper ends of the superheater headers are located outside of 36 the inclined tubes4and protected from hot gases the boiler setting. In these figures reference by baflles. Return bend tubes 10 connect the character 20 indicates the portions or sections of inlet header 9 to the outlet header 11 of the the support through which the upper portions superheater. The tubes 10 are each provided of the tubes 10 pass. The sections 20 are prowith several return bends and the return bends vided with hook shaped flanges 21 at the upper 40 near the headers 9 and 11 may be supported upon and lower edges with other correspondingly a support or baflle 12 that rests upon the tubes 9, shaped flanges 22 on the remainder of the supwith the projections 13 on the return bends export so that the sections 20 will be kept in place tending through holes in the support or ballie 12. and can move with the movement of the tubes Tile-12' are located on the gas side of the support 10 as they are moved by the expansion and con- 4 or baflle 12. A support 10' may be provided near traction of the outlet header of the superheater. the other end of the superheater tubes 10, this In the modification shown in Figs. 7 and 8, the support also resting upon the tubes 4. support for the end of the superheater near the In the modification shown in Fig. 2, the superheaders is. by means of the bafne 23 that is supheater headers 9 and 11 are located outside of the ported upon an upper bank of inclined tubes 4.

0 boiler setting. Supports 14 and 15 are provided The lower edge of the support or bailie 23 is profor the superheater tubes 10, these supports restvided with hooked flange 24 to support the secing upon the tubes 4. A baflie 16 that may be tions 25 through which the upper portions of the lined on the gas side with tile 16' supports the tubes 10 pass. The sections 25 are provided with return bends of the superheater tubes 10 near hooked flanges 26 and 2'7 so that these sections 55 the headers 9 and 11. will be supported by the support 23 and will in turn support the remainder 28 of the support that is provided with the hooked flange 29 at its upper edge.

We claim:

1. In a superheater support, means comprising slidable plates for supporting a row oi superheater tubes so that they may move laterally with respect to each other.

2. In a superheater, an outlet header, a row of superheater tubes connected to said header, a support for saidtubes near said header permitting said tubes to move apart as said header expands, and a support for other tubes of said superheater supported by said first named support.

3. In a superheater comprising return bend tubes, 9. support at said return bends, a portion of said support being slidable with respect to the remainder thereof.

4. In a superheater comprising return bend tubes, a support at said retum bends, a portion of said support being slidable with respect to the remainder thereof and sustaining said remainder.

5. In a superheater comprising return bend tubes, a support at said return bends, a portion of said support being slidable with respect to the remainder thereof, and tubes of said superheater extending through said slidable portion oi! said support.

6. In a steam superheater, a gas pass wall formed with two spaced rows of tube openings, a superheater inlet header, a row of superheater inlet tubes extending from the header through the openings of one of said rows into the gas pass, a superheater outlet header, a row of superheater outlet tubes extending from the outlet header through the other row of openings and into the gas pass, and sections movable relatively to each other longitudinally oithe outlet header and constituting that portion of the wall through which the outlet tubes extend and supporting the tubes, there being a plurality of outlet tube openings in some of said sections.

7. In a Iurnace, a baiile support, a plurality of horizontally aligned and relatively movable separate baiile sections slidably hung from the support, a fixed lower section suspended from said sections, and relatively movable groups of superheater tubes passing through the relatively movable sections.

8. In a fluid heater having connected tubes extending across a gas pass, a header, a support for the tubes including a part interfltting with certain of the tubes only so as to be movable in unison therewith and slidable with respect to the remainder of the support and longitudinally of the header, said part having its interfitting and associated tubes extending through openings therein.

9. In combination, superheater tubes conducting steam across a gas pass, a ban'ie having the outlet portions of the superheater tubes extending through and beyond one part and the inlet portions of the tubes extending through and be- 'yond another part, a superheater outlet header spaced from the baii'ie and having the outlet portions connected thereto, and means for connecting the inlet portions 01' the tubes to a source of steam, thefirst part 01' the baiile constituting separate sections relatively movable longitudinally of the outlet header and supporting the outlet portions of the tubes so that some of the tubes may move longitudinally of the header relative to others.

10. In a suspended baflle construction, a plurality of successive sections each having formations so that each section is hooked to the one above it, and fluid heat exchange tubes receiving heat from the iumace, one of said sections consisting of] a plurality of separate parts movable relative to each other and to the other sections with each part so related to the tubes that it is moved by a group of those tubes.

, HOWARD J. KERR.

WILLIAM A. JONES.