US1804780A

US1804780A - Header and support therefor

Info

Publication number: US1804780A
Application number: US319152A
Authority: US
Inventors: William A Jones
Original assignee: Babcock and Wilcox Co
Current assignee: Babcock and Wilcox Co
Priority date: 1922-07-29
Filing date: 1928-11-13
Publication date: 1931-05-12
Anticipated expiration: 1948-05-12

Description

May 12, 1931. w. A. JONES- HEADER AND SUPPORT THEREFOR Original Filed July 29, 1922 4. fly kw /i. ATTORNEYS INVENTOR Patented "May 12, ,931

errant STATES PATENT OFFICE WILLIAM A. JONES, 0F WESTERLEIGH, YORK, ASSIGNOR T0 THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY HEADER AND SUPEORT THEREFOR Original application filed July 29, 1922, Serial No. 578,294. Divided and this application filed November 13,

1928. Serial N 319,152;

\Vhile not limited thereto, my invention particularly relates to steam boilers in'which a superheater is rovided.

One of the ob ects of my invention is to provide means by. which the superheater, and particularly the headers may be sus pended from boiler parts. Another 0b.]ect of my invention is to provide means by which a superheater, and particularly the headers may be suspended amongst water tubes from such water tubes or assoclated boiler parts.

lViththis and other objects in view, my invention consists in the combinations and arrangements hereinafter described, and more particularly pointed out in the appended claims.

The present application is a (llV1S1OI1 Of my application Serial No. 578,294, which was filed in the Patent Office on or about July 29, 1922.

My invention will best be understood by reference to the accompanying drawings 1n which I have illustrated the preferred embodiment of my invention, and in which Fig. 1 is an elevation, partly in section, of a portion of a water tube boiler provided with a superheater and Fig. 2 is a section taken alon the plane of the line 2-2 of Fig. 1.

Li e reference characters indicate like parts in the views. In the boiler which I have chosen for purposes of illustration in connection with my invention, the water tubes are horizontally inclined and formed into a lower bank 10 and an upper bank 11 with a space 12 be tween them. The tubes are connected at their ends to usual headers, the headers 101 and. 102 connected by nipples 103 being illustrated at only one end'of the tubes. It will, of course, be understood that the headers are connected to an upper steam and. water drum in the usual manner. The boiler is provided with a furnace, a portion of the furnace chamber of which is indicated ed by U-tub'es 22.

ting Similarly, outlet header 19 extends across "the space, the headers being connect- The U-tubes extend in the same general direction as the water ,tube'sQ Th'e'boiler in the form illustrated is rovided'with a baffle 23, located above and extcnding along the uppermost ,row of tubes of the lower bank 10 'to a point adjacent: the superheater headers. The gases zare"directedacross the tubes by suitable baffles, 'onego-f which is illustrated at 24;

In modern practice, the space between the sidewalls of boiler settings is quite wide and, because of the varying conditions which may arise within the superheater, the headers are subject to strains which tend to distort them. I provide means by which these headers may be supported throughout their length, and yet in such a manner that a relative motion, due to, expansion and con traction of the headers, will be permitted in each header in relation to the other headerand also to the boiler parts.

In the form of my invention illustrated, the header 17 has formed thereon'at its upper sidea fin 27 which may be divided into sections, as shown. This fin or these fins may be joined to the header body 17 by welding either electrically or autogenously. The.

bafiie 24: is preferably provided, in the usual way, with a backing plate 28, and the fin 27 will be placed against this plate and con-' nected thereto by bolts passing through holes 29 in the fin 27 and in the plate 28. Preferably, one.or both sets of these holes are slotted, as illustrated, in a direction parallel-to the longitudinal direction of the header, so that the headers may move length wise'of their axes and relativel to each other, without straining or tearing apart the suspension fasteners.

The upper header 17 is also preferably provided with a fin or fins 33 on the side opposite to the fins 27, which fins 38 may be formed in a similar manner. The, outlet header 19 is also preferably provided with fins 34 on its upper side, similar to the upper fins of the inlet header 17, and the

fins

33 and 34 are connected in overlapping relation by fasteners 35 passing through holes I in the two fins. The holes of one of these sets are preferably elongated longitudinally of the axes of the headers, as illustrated, so as to permit relative longitudinal movement between the two. A baille 36 is placed partly surrounding and in front of the headers to connect the lower end of the battle 24 with the end of the longitudinal baffle 23. In the form illustrated and described, both headers are suspended from boiler parts, and preferably from plates 28 which, in turn, are engaged by the water tubes in the usual manner.

It will be seen that I have provided a means by which superheater headers extendin across the boiler beneath some of the tubes thereof may be suspended from the boiler parts, such a baflles or tubes, and so that the possibility of sagging of the headers between their end supports will be avoided. At the same time, the headers are free to move longitudinally relatively to each other, as the will do under the varying conditions to wh1ch a superheater is subjected. It will also be seen that the superheater boxes form a part of a'baflle which extends across the superheater space, this battle at the same time protecting one of the faces of the superheater boxes so that the possibility of distortion arising from the higher temperature in one pass than inanother will be eliminated. It will also be noted that when the bafile comprises, as illustrated, plates 28 extending upwardly across the upper bank of water tubes and engaged by a lurality of those water tubes, the weight oi the superheater when connected to the bafile will, in fact, be carried, not by the lower water tubes only of the upper bank, but by all of those 1 water tubes. The bafile plate 28, by connecting the several water tubes, form what is, in fact, a beam made up of all the water tubes, and, therefore, strong enough to resist distortion under the weight of the super-heater.

It will be understood that the form of my invention which I have shown is merely illustrative and that the construction may be widely varied. WVhile I have shown the superheater in a space between the two groups of tubes, it will be understood that, for some purposes, the superheater may be above the water tubes and suspended from other boiler parts. By 'forming the suspension member as substantially an integral part of the boxes, I produce a construction which is not only simple, but which is capable of withstanding the action of the heat of the boiler.

I claim:

1. In a fluid heater, a pair of horizontally extending, substantially parallel headers disposed adjacent one another and one above the other, and heating tubes connecting the headers, a plurality of supports for supporting the upper header from above it and posed adjacent one another and one above the other, and heating tubes connecting the headers, a plurality of supports for supporting the upper header from above it and spaced along the length of the header, and members independent of said tubes forming suspension devices for connecting the lower header to the upper header and spaced along the length of the headers, said suspension devices being constructed and arranged to permit the headers to move longitudinally relatively to each other.

. 3. In'a fluid heater, a pair of horizontally disposed, substantially parallel headers, one above the other, and heating tubes connecting the headers, a plurality of supports for supporting the upper header from above and spaced along the length of the header, said headers being provided with overlapping fins, and means for securing said fins together.

4. In a fluid heater,.a pair of horizontally disposed, substantially parallel headers, one above the other, and heating tubes connecting the headers, a plurality of sup orts for supporting the upper header from Jove and spaced along the length of the header, said headers being provided with overlapping tins, and means for securing said fins together and permitting the headers to move longitudinally relatively to each other.

In a water tube boiler, two spaced groups of water tubes, a superheater in the space having upper and lower headers extending across the tubes, means for suspending the upper header from the upper bank of tubes, and means for suspending the lower header from the said upper header.

6. In a water tube boiler, two spaced groups of water tubes, a superheater in the space having upper and lower headers extending across the tubes, the upper header being provided with at least one in, means attachable to said fin for supporting the up per header from the upperbanir of tubes, the upper and lower header being provided with overlapping fins, and means for securing said fins together and rrnitting the headers to move longitudinally relatively to each other.

7. In a water tube boiler, two groups of water tubes spaced apart, a cross bathe in the group of tubes above the space, a superheater in'the space having headers extending across the tubes and beneath some of the tubes, means to suspend the headers from the cross battle, coinprisiin; a suspension member between one of the headers and the 13 bafiie, and suspension members between the headers.

8. In a water tube boiler, two groups of water tubes spaced apart, a cross bafile in the Illgroup of tubes above the space, a superheater in the space having headers extending across the tubes and beneath some of the tubes, means to suspend the headers from the cross baflle, comprising suspension members between one of the headers and the batfie, and suspension members between the headers, said suspension members being constructed and arranged to permit the headers to move longitudinally relatively to each other and to said battle.

9. In a water tube boiler, two groups of water tubes spaced apart, a cross battle in the group of tubes above the space, a superheater in the space having headers extending across the tubes and beneath some of the tubes, means to suspend the headers from the cross battle, comprising suspension members between one of the headers and the battle, suspension members between the headers, and an auxiliary battle connecting with the lower end of the cross bafile and-extending across the space at one side of the head-' ers. I

10. In a water tube boiler, two groups of water tubes spaced apart, a superheater in the space having headers extending acrossheld in parallel relation with each other,

said members being constructed and arranged to permit the headers to move longitudinally with respect to each other while maintaining a gas tight seal, and means for supporting said headers from boiler tubes.

11. In a water tube boiler, two groups of water tubes spaced apart, a superheater in the-space having headers extending across the tubes and beneath some of them, a bafiie for closing the space between the headers comprising overlapping metallic members held in parallel relation with each other, said members being constructed and arranged to permit the headers to move lon itudinally with respect to each other wh1le maintaining a gas tight seal, and refractory material located in front of said headers on the hottest side thereof for shielding the same from the hot gases, and means for supporting said headers from boiler tubes.

12. In a water tube boiler, two groups of water tubes spaced apart, a cross battle in the group of tubes above the space, a superheater in the space having headers extending across the tubes and beneath some of them, means for suspending the uppermost header from said cross bafiie, and a baffle for closing the spacebetween the headers comprising overlapping metallic members held in parallel relation with each other,

said members being constructed and arranged to permit the headers to move longitudinally with respect to each other wh1le maintaining a gas tight seal.

13. In a uid heater, a pair of horizontally extending, substantially parallel headers disposed adjacent one another and one above the other, and heating tubes connecting the headers, means for supporting the upper header, and means independent of said tubes for suspending the lower header from the upper header.

14. In a fluid heater, a pair of horizontally extending, substantially parallel headers disposed adjacent one another and one above the other, and heating tubes connecting the headers, means for supporting the upper header, and means independent of said tubes for flexibly suspending the lower header from the upper header.

15. In a fluid heater, a pair of horizontally extending, substantially parallel headers disposed adjacent one another and one above the other, and heatin tubes connecting the headers, a plurality 0% supports independent of said tubes for supporting the up er header from above and spaced along t e length of the header, and means for suspending the lower header from the upper header. a

16. In a fluid heater, a pair of horizontally disposed, substantially parallel headers, one above the other, each header being prow'ded on the side facing the other header with a fin, heating, tubes connecting said headers, a plurality of supports for supporting the upper header from above and spaced along the header, and suspension devices connecting said fins and spaced along the length of the headers for supporting the lower header from thempper.

Y WILLIAM A. JONES.