Boiler for use with gaseous fuel or oil |
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| 申请号 | US25844472 | 申请日 | 1972-05-31 | 公开(公告)号 | US3805745A | 公开(公告)日 | 1974-04-23 |
| 申请人 | RAYPAK INC; | 发明人 | BLOCK L; ASHTON L; | ||||
| 摘要 | The boiler has two horizontal rows of steel tubes with steel fins staggered with respect to each other and extending between tube sheets. Headers are associated with the tube sheets to provide multiple passes. The tube sheets are in sections having joints between the sections so that the tube sheets are articulated to allow freedom of axial expansion relatively of tubes in respective passes to prevent failure at tube ends. The tubes are copper lined and the faces of tubes sheets within headers are copper clad with copper inserts joining ends of copper tube linings with copper claddings. | ||||||
| 权利要求 | 1. In a boiler construction, in combination: means comprising a plurality of steel tubes having steel fins; and tube sheet means having the tubes extending between them, there being only two horizontal rows of tubes, the tubes in the respective rows being staggered with respect to each other so that the tubes in one row do not directly overlie tubes in another row so that tubes are exposed equally to radiant heat. 2. A boiler construction as in claim 1, wherein the tubes are arranged so as to provide a plurality of passes so related to each other that fluid traverses the passes in sequence. 3. In a boiler construction, in combination: means comprising a plurality of finned tubes; and tube sheet means having the tubes extending between them, there being only two horizontal rows of tubes, the tubes in the respective rows being staggered with respect to each other so that the tubes in one row do not directly overlie tubes in another row so that tubes are exposed equally to radiant heat, the tubes being arranged so as to provide a plurality of passes so related to each other that fluid traverses the passes in sequence, said tube sheet means comprising a plurality of tube sheet sections at each end of the tubes, means providing joints between tube sheet sections allowing relative movement between adjacent tube sheet sections in the direction of the axis of the tube whereby to allow for variable expansion of tubes in different passes. 4. A boiler construction as in claim 3, wherein said tube sheet sections are so interrelated to each other that the tube means in each pass have freedom to expand without disturbing the joints between the ends of tubes and the tube sheets. 5. A boiler construction as in claim 3, including header means associated with tube sheet sections, said tube sheet sections and header means including tube sheet sections with an associated header which provides communication between the tube means of one pass and tube means of another pass with the tube means of the one pass and of the other pass being free to expand axially relatively to each other. 6. A boiler construction as in claim 3, adjacent tube sheet sections having portions juxtaposed against each other, said juxtaposed portions having recesses therein opposed to each other, and a sealing means disposed in the opposed recesses for allowing limited relative movement as between the juxtaposed portions. 7. A boiler construction as in claim 6, wherein the sealing means is made of flexible material forming a seal. 8. A boiler construction as in claim 1, including supporting means for said tube sheets, said supporting means having attachment to said tube sheets whereby to allow relative movement of the tube sheets in the direction of the axes of the tubes. 9. A boiler construction as in claim 8, wherein said supporting means are in the form of members suspending the tube sheets from a frame structure. 10. In a boiler construction, in combination: means comprising tube sheets having a plurality of metal tubes extending therebetween, the ends of said tubes extending into openings in the tube sheets; means comprising copper linings within the tubes, said tube sheets having a surface forming a part of a header, said surface having a copper cladding thereon; and means whereby the ends of the copper lining are joined to said copper cladding so that fluid is exposed only to the copper. 11. A boiler construction as in claim 10, including means comprising a copper ring at the end of a tube positioned to be interposed between the end of a copper tube lining and the copper cladding on said surface of the tube sheet. 12. A boiler construction as in claim 11, wherein each of said openings in said tube sheet comprises a bore and a counterbore, said copper tube lining extending beyond the end of the tube at the counterbore, said copper cladding having a circular flange part extending into the counterbore; and means comprising a copper ring having a cross section to provide a part engaging against an extending end part of the copper lining and an extending part in said counterbore juxtaposed against said circular flange on the copper cladding. 13. A boiler construction as in claim 12, wherein the end of each tube and its lining is flared outwardly into said counterbore. 14. In a boiler construction, in combination: means comprising tube sheet means having tubes extending therebetween, the ends of the tubes being sealed to the tube sheet means; tube sheet means comprising a plurality of tube sheet sections at each end of the tubes; means providing joints between tube sheet sections allowing relative movement between adjacent tube sheet sections in the direction of the axes of the tubes whereby to allow for variable expansion of the tubes. 15. A boiler construction as in claim 14, wherein said tube sheet sections are so interrelated to each other that tubes connected to different tube sheet sections have feeedom to expand. 16. A boiler construction as in claim 15, including header means associated with tube sheet sections, including tube sheet sections with an associated header which provide communication betwe the tube means of one pass through the boiler and tube means of another pass through the boiler with the tube means of the different passes being free to expand axially relative to each other. 17. A boiler construction as in claim 15, wherein said tube sheet sections have edge portions juxtaposed against each other, said portions having recesses therein opposed to each other, and a holding means disposed in the opposed recesses for allowing limited relative movement between the juxtaposed portions. |
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