EP1617139A1 - Pipe in a fire tube boiler - Google Patents
Pipe in a fire tube boiler Download PDFInfo
- Publication number
- EP1617139A1 EP1617139A1 EP05014961A EP05014961A EP1617139A1 EP 1617139 A1 EP1617139 A1 EP 1617139A1 EP 05014961 A EP05014961 A EP 05014961A EP 05014961 A EP05014961 A EP 05014961A EP 1617139 A1 EP1617139 A1 EP 1617139A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipe
- wall
- fins
- arc
- fire tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/40—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/06—Flue or fire tubes; Accessories therefor, e.g. fire-tube inserts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/001—Guiding means
- F24H9/0026—Guiding means in combustion gas channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
Definitions
- boilers for generating hot water particularly small boilers for domestic use, quite frequently have a structure that is known as "fire tube", comprising a plurality of pipes designed to convey internally the products of the combustion generated by a burner before sending them to the flue, and to be struck on the outside by the water to be heated.
- fire tube comprising a plurality of pipes designed to convey internally the products of the combustion generated by a burner before sending them to the flue, and to be struck on the outside by the water to be heated.
- the aim of the present invention is to provide a pipe which is adapted to be installed in a fire tube boiler and has high characteristics of heat exchange between the products of combustion and the water to be heated.
- a pipe in a fire tube boiler designed to convey the combustion gases and to be struck at its outer surface by the water to be heated, characterized in that it comprises a wall having a constant thickness along its entire length and a plurality of fins which protrude monolithically from at least one arc-like support, which is associated in contact with the internal surface of said wall.
- the reference numeral 1 generally designates the pipe according to the invention, which is designed to convey internally the products of combustion and to be struck at its outer surface by the water to be heated.
- the pipe 1 comprises a wall 2, which has a constant thickness along its entire length, and at least one and preferably two arc-like sectors 3 and 4 are associated in contact with said wall, for example by means of a mold or by rolling, and a plurality of fins such as 3a, 4a protrude from the sectors.
- Figures 3 and 4 illustrate further embodiments related to the shape of the fins provided in the pipe: thus, pipe 5 of Figure 3 comprises a wall 6 having a constant thickness along its entire length, which has in contact therewith three arc-like sectors 7, 8, 9, from which fins such as 7a, 8a, 9a protrude respectively; pipe 10 of Figure 4 comprises a wall 11 with constant thickness, which has in contact therewith four arc-like sectors 12, 13, 14, 15, from which fins such as 12a, 13a, 14a, 15a protrude.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Geometry (AREA)
- Details Of Fluid Heaters (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
- The present invention relates to a pipe in a fire tube boiler.
- It is known that boilers for generating hot water, particularly small boilers for domestic use, quite frequently have a structure that is known as "fire tube", comprising a plurality of pipes designed to convey internally the products of the combustion generated by a burner before sending them to the flue, and to be struck on the outside by the water to be heated.
- The aim of the present invention is to provide a pipe which is adapted to be installed in a fire tube boiler and has high characteristics of heat exchange between the products of combustion and the water to be heated.
- The above aim and other objects that will become better apparent hereinafter are achieved by a pipe in a fire tube boiler according to the invention, designed to convey the combustion gases and to be struck at its outer surface by the water to be heated, characterized in that it comprises a wall having a constant thickness along its entire length and a plurality of fins which protrude monolithically from at least one arc-like support, which is associated in contact with the internal surface of said wall.
- Further characteristics and advantages of the invention will become better apparent from the description of some preferred but not exclusive embodiments of the pipe according to the invention, illustrated by way of non-limiting example in the accompanying drawings, wherein:
- Figure 1 is a transverse sectional view of the pipe according to the invention, taken along the line I-I of Figure 2;
- Figure 2 is a sectional view of a portion of the pipe, taken along the line II-II of Figure 1;
- Figures 3 and 4 are transverse sectional views of pipes according to further embodiments.
- With reference to the Figures 1 and 2, the reference numeral 1 generally designates the pipe according to the invention, which is designed to convey internally the products of combustion and to be struck at its outer surface by the water to be heated.
- The pipe 1 comprises a
wall 2, which has a constant thickness along its entire length, and at least one and preferably two arc-like sectors - Such pipe 1 ensures good heat exchange efficiency and therefore ensures a temperature of the fins that is high enough to prevent condensation of the water vapor that is present in the combustion gases conveyed by the pipe.
- Figures 3 and 4 illustrate further embodiments related to the shape of the fins provided in the pipe: thus,
pipe 5 of Figure 3 comprises awall 6 having a constant thickness along its entire length, which has in contact therewith three arc-like sectors pipe 10 of Figure 4 comprises awall 11 with constant thickness, which has in contact therewith four arc-like sectors - The described invention is susceptible of numerous other modifications and variations, all of which are within the scope of the appended claims; all the details may further be replaced with other technically equivalent elements.
- The disclosures in Italian Patent Application No. MN2004A000019 from which this application claims priority are incorporated herein by reference.
- Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly, such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
Claims (4)
- A pipe (1) in a fire tube boiler, designed to convey the combustion gases and to be struck at its outer surface by the water to be heated, characterized in that it comprises a wall (2) which has a constant thickness along its entire length and a plurality of fins (3a, 4a, 7a, 8a, 9a, 12a, 13a, 14a, 15a) which protrude monolithically from at least one arc-like support (3,4,7,8,9,12,13,14,15), which is associated in contact with the internal surface of said wall.
- The pipe according to claim 1, characterized in that the fins (3a, 4a, 7a, 8a, 9a, 12a, 13a, 14a, 15a) protrude monolithically from two arc-like sectors (3,4) associated in contact with the internal surface of said wall.
- The pipe according to claim 1, characterized in that the fins protrude from three arc-like sectors (7,8,9) associated in contact with the internal surface of said wall.
- The pipe according to claim 1, characterized in that the fins protrude from four arc-like sectors (12,13,14,15) associated in contact with the internal surface of said wall.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000019A ITMN20040019A1 (en) | 2004-07-13 | 2004-07-13 | TUBE IN A SMOKE TUBE BOILER |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1617139A1 true EP1617139A1 (en) | 2006-01-18 |
EP1617139B1 EP1617139B1 (en) | 2016-08-31 |
Family
ID=35058765
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05014961.6A Revoked EP1617139B1 (en) | 2004-07-13 | 2005-07-11 | Pipe in a fire tube boiler |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060201451A1 (en) |
EP (1) | EP1617139B1 (en) |
ES (1) | ES2612012T3 (en) |
IT (1) | ITMN20040019A1 (en) |
PL (1) | PL1617139T3 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1936315A1 (en) * | 2006-12-13 | 2008-06-25 | UNICAL AG S.p.A. | Protected carbon steel pipe for conveying flue gases in a heat exchange apparatus |
WO2010129847A2 (en) * | 2009-05-08 | 2010-11-11 | E. I. Du Pont De Nemours And Company | Process of using an improved flue in a titanium dioxide process |
ITMI20101086A1 (en) * | 2010-06-16 | 2011-12-17 | Unical Ag Spa | TUBE IN BOILER WITH SMOKE PIPES. |
EP2781873A4 (en) * | 2011-11-14 | 2015-10-07 | Sung-Hwan Choi | Heat exchange pipe and manufacturing method thereof |
EP2944910A1 (en) * | 2014-05-13 | 2015-11-18 | Grand Hall Enterprise Co., Ltd. | Heat exchanger tube |
CN111577467A (en) * | 2020-05-27 | 2020-08-25 | 中国航空发动机研究院 | Spliced heat exchanger for high-speed air suction type engine |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5476080B2 (en) * | 2009-09-29 | 2014-04-23 | 株式会社Uacj | Aluminum inner surface grooved heat transfer tube |
KR20150108581A (en) * | 2014-03-18 | 2015-09-30 | 그랜드 홀 엔터프라이즈 컴파니 리미티드 | Heat exchanger tube |
CN104613805A (en) * | 2015-01-26 | 2015-05-13 | 西安交通大学 | Axisymmetric comb-shaped inner fin structure and fin tube thereof |
CN104613646B (en) * | 2015-01-27 | 2017-05-10 | 佛山市沃克曼普电气有限公司 | Heat exchange sheet |
US20180202724A1 (en) * | 2017-01-19 | 2018-07-19 | Dong Yong Hot Water System Inc. | Conductive structure of heat exchange pipe |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB472075A (en) * | 1935-06-19 | 1937-09-16 | Alexander Varga | Improvements in and relating to tubular heat transmitting bodies suitable for smoke-tube boilers |
GB698843A (en) * | 1950-09-18 | 1953-10-21 | Brown Fintube Co | Heat exchanger tube with internal fins and method of making same |
JPH09318172A (en) * | 1996-05-31 | 1997-12-12 | Sanyo Electric Co Ltd | Heat exchanger for external combustion type hot-gas engine |
US6070657A (en) * | 1994-03-24 | 2000-06-06 | Hoval Interliz Ag | Heat exchanger tube for heating boilers |
JP2003254690A (en) * | 2002-02-28 | 2003-09-10 | Usui Kokusai Sangyo Kaisha Ltd | Heat exchanger pipe and heat exchanger using this heat exchanger pipe |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US813918A (en) | 1899-12-29 | 1906-02-27 | Albert Schmitz | Tubes, single or compound, with longitudinal ribs. |
US1692529A (en) | 1926-01-29 | 1928-11-20 | American Luigi Corp | Machine for making hollow tubes or conductors |
US2203317A (en) | 1938-01-20 | 1940-06-04 | Locomotive Firebox Co | Locomotive smokestack |
US2707493A (en) * | 1943-03-13 | 1955-05-03 | Claude A Bonvillian | Conduits |
US2930405A (en) | 1955-05-31 | 1960-03-29 | Brown Fintube Co | Tube with internal fins and method of making same |
BE653792A (en) | 1963-09-30 | |||
US3267564A (en) | 1964-04-23 | 1966-08-23 | Calumet & Hecla | Method of producing duplex internally finned tube unit |
DE2920057C2 (en) | 1979-05-18 | 1982-09-16 | Kurt 7520 Bruchsal Heim | Inner finned tube for pressurized gas or pressurized oil-fired boilers |
DE3231322C2 (en) | 1982-08-23 | 1984-07-05 | Kurt 7520 Bruchsal Heim | Inner finned tube for pressurized gas or pressurized oil boilers |
DE8511562U1 (en) | 1985-04-18 | 1985-07-25 | Wolf Klimatechnik GmbH, 8302 Mainburg | Inner finned tube for gas or oil-fired boilers |
JP2004309074A (en) | 2003-04-10 | 2004-11-04 | Usui Kokusai Sangyo Kaisha Ltd | Heat transfer pipe internally having fin member |
-
2004
- 2004-07-13 IT IT000019A patent/ITMN20040019A1/en unknown
-
2005
- 2005-07-11 PL PL05014961T patent/PL1617139T3/en unknown
- 2005-07-11 EP EP05014961.6A patent/EP1617139B1/en not_active Revoked
- 2005-07-11 ES ES05014961.6T patent/ES2612012T3/en active Active
-
2006
- 2006-05-15 US US11/433,493 patent/US20060201451A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB472075A (en) * | 1935-06-19 | 1937-09-16 | Alexander Varga | Improvements in and relating to tubular heat transmitting bodies suitable for smoke-tube boilers |
GB698843A (en) * | 1950-09-18 | 1953-10-21 | Brown Fintube Co | Heat exchanger tube with internal fins and method of making same |
US6070657A (en) * | 1994-03-24 | 2000-06-06 | Hoval Interliz Ag | Heat exchanger tube for heating boilers |
JPH09318172A (en) * | 1996-05-31 | 1997-12-12 | Sanyo Electric Co Ltd | Heat exchanger for external combustion type hot-gas engine |
JP2003254690A (en) * | 2002-02-28 | 2003-09-10 | Usui Kokusai Sangyo Kaisha Ltd | Heat exchanger pipe and heat exchanger using this heat exchanger pipe |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 04 31 March 1998 (1998-03-31) * |
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1936315A1 (en) * | 2006-12-13 | 2008-06-25 | UNICAL AG S.p.A. | Protected carbon steel pipe for conveying flue gases in a heat exchange apparatus |
WO2010129847A2 (en) * | 2009-05-08 | 2010-11-11 | E. I. Du Pont De Nemours And Company | Process of using an improved flue in a titanium dioxide process |
WO2010129847A3 (en) * | 2009-05-08 | 2011-11-10 | E. I. Du Pont De Nemours And Company | Process of using an improved flue in a titanium dioxide process |
ITMI20101086A1 (en) * | 2010-06-16 | 2011-12-17 | Unical Ag Spa | TUBE IN BOILER WITH SMOKE PIPES. |
WO2011157495A1 (en) * | 2010-06-16 | 2011-12-22 | Unical Ag S.P.A | Tube in fire tube boiler |
EP2781873A4 (en) * | 2011-11-14 | 2015-10-07 | Sung-Hwan Choi | Heat exchange pipe and manufacturing method thereof |
EP2944910A1 (en) * | 2014-05-13 | 2015-11-18 | Grand Hall Enterprise Co., Ltd. | Heat exchanger tube |
CN111577467A (en) * | 2020-05-27 | 2020-08-25 | 中国航空发动机研究院 | Spliced heat exchanger for high-speed air suction type engine |
CN111577467B (en) * | 2020-05-27 | 2021-08-31 | 中国航空发动机研究院 | Spliced heat exchanger for high-speed air suction type engine |
Also Published As
Publication number | Publication date |
---|---|
EP1617139B1 (en) | 2016-08-31 |
ES2612012T3 (en) | 2017-05-11 |
US20060201451A1 (en) | 2006-09-14 |
ITMN20040019A1 (en) | 2004-10-13 |
PL1617139T3 (en) | 2017-02-28 |
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