US20060201451A1 - Pipe in a fire tube boiler - Google Patents

Pipe in a fire tube boiler Download PDF

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Publication number
US20060201451A1
US20060201451A1 US11/433,493 US43349306A US2006201451A1 US 20060201451 A1 US20060201451 A1 US 20060201451A1 US 43349306 A US43349306 A US 43349306A US 2006201451 A1 US2006201451 A1 US 2006201451A1
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US
United States
Prior art keywords
pipe
wall
arc
fins
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.)
Abandoned
Application number
US11/433,493
Inventor
Giovanni Jahier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unical AG SpA
Original Assignee
Unical AG SpA
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35058765&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20060201451(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Unical AG SpA filed Critical Unical AG SpA
Assigned to UNICAL AG S.P.A. reassignment UNICAL AG S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JAHIER, GIOVANNI
Publication of US20060201451A1 publication Critical patent/US20060201451A1/en
Abandoned legal-status Critical Current

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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

  • the present invention relates to a pipe in a fire tube boiler.
  • 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.
  • FIG. 1 is a transverse sectional view of the pipe according to the invention, taken along the line I-I of FIG. 2 ;
  • FIG. 2 is a sectional view of a portion of the pipe, taken along the line II-II of FIG. 1 ;
  • FIGS. 3 and 4 are transverse sectional views of pipes according to further embodiments.
  • 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 3 a , 4 a protrude from the 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.
  • FIGS. 3 and 4 illustrate further embodiments related to the shape of the fins provided in the pipe: thus, pipe 5 of FIG. 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 7 a , 8 a , 9 a protrude respectively; pipe 10 of FIG. 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 12 a , 13 a , 14 a , 15 a protrude.

Abstract

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, comprising a wall which has 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 the wall.

Description

  • The present invention relates to a pipe in a fire tube boiler.
    • BACKGROUND OF THE INVENTION
  • 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.
    • SUMMARY OF THE INVENTION
  • 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.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • 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:
  • FIG. 1 is a transverse sectional view of the pipe according to the invention, taken along the line I-I of FIG. 2;
  • FIG. 2 is a sectional view of a portion of the pipe, taken along the line II-II of FIG. 1;
  • FIGS. 3 and 4 are transverse sectional views of pipes according to further embodiments.
    • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • With reference to the FIGS. 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 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 3 a, 4 a protrude from the 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.
  • FIGS. 3 and 4 illustrate further embodiments related to the shape of the fins provided in the pipe: thus, pipe 5 of FIG. 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 7 a, 8 a, 9 a protrude respectively; pipe 10 of FIG. 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 12 a, 13 a, 14 a, 15 a protrude.
  • 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.

Claims (4)

1. 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, comprising a wall which has 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.
2. The pipe according to claim 1, wherein the fins protrude monolithically from two arc-like sectors associated in contact with the internal surface of said wall.
3. The pipe according to claim 1, wherein the fins protrude from three arc-like sectors associated in contact with the internal surface of said wall.
4. The pipe according to claim 1, wherein the fins protrude from four arc-like sectors associated in contact with the internal surface of said wall.
US11/433,493 2004-07-13 2006-05-15 Pipe in a fire tube boiler Abandoned US20060201451A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMN2004A000019 2004-07-13
IT000019A ITMN20040019A1 (en) 2004-07-13 2004-07-13 TUBE IN A SMOKE TUBE BOILER

Publications (1)

Publication Number Publication Date
US20060201451A1 true US20060201451A1 (en) 2006-09-14

Family

ID=35058765

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/433,493 Abandoned US20060201451A1 (en) 2004-07-13 2006-05-15 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011075123A (en) * 2009-09-29 2011-04-14 Sumitomo Light Metal Ind Ltd Aluminum internally-grooved heat transfer tube
CN102422115A (en) * 2009-05-08 2012-04-18 纳幕尔杜邦公司 Process of using an improved flue in a titanium dioxide process
CN104613805A (en) * 2015-01-26 2015-05-13 西安交通大学 Axisymmetric comb-shaped inner fin structure and fin tube thereof
CN104613646A (en) * 2015-01-27 2015-05-13 胡桂林 Heat exchange sheet
US20150267970A1 (en) * 2014-03-18 2015-09-24 Grand Hall Enterprise Co., Ltd. Heat exchanger tube
US20180202724A1 (en) * 2017-01-19 2018-07-19 Dong Yong Hot Water System Inc. Conductive structure of heat exchange pipe

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMN20060071A1 (en) * 2006-12-13 2008-06-14 Unical Ag Spa CARBON STEEL PIPE PROTECTED FOR THE CONVEYANCE OF FUMES IN HEAT EXCHANGE APPLIANCE.
IT1401296B1 (en) * 2010-06-16 2013-07-18 Unical Ag Spa TUBE IN BOILER WITH SMOKE PIPES.
KR101287707B1 (en) * 2011-11-14 2013-08-07 최성환 Heat exchanger pipe and manufacturing method therefor
EP2944910B1 (en) * 2014-05-13 2016-05-25 Grand Hall Enterprise Co., Ltd. Heat exchanger tube
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

Citations (6)

* Cited by examiner, † Cited by third party
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.
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
US3267564A (en) * 1964-04-23 1966-08-23 Calumet & Hecla Method of producing duplex internally finned tube unit
US3267563A (en) * 1963-09-30 1966-08-23 Calumet & Hecla Method of producing composite tubes
US6070657A (en) * 1994-03-24 2000-06-06 Hoval Interliz Ag Heat exchanger tube for heating boilers

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1692529A (en) 1926-01-29 1928-11-20 American Luigi Corp Machine for making hollow tubes or conductors
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
US2930405A (en) 1955-05-31 1960-03-29 Brown Fintube Co Tube with internal fins and method of making same
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
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
JP2004309074A (en) 2003-04-10 2004-11-04 Usui Kokusai Sangyo Kaisha Ltd Heat transfer pipe internally having fin member

Patent Citations (6)

* Cited by examiner, † Cited by third party
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.
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
US3267563A (en) * 1963-09-30 1966-08-23 Calumet & Hecla Method of producing composite tubes
US3267564A (en) * 1964-04-23 1966-08-23 Calumet & Hecla Method of producing duplex internally finned tube unit
US6070657A (en) * 1994-03-24 2000-06-06 Hoval Interliz Ag Heat exchanger tube for heating boilers

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102422115A (en) * 2009-05-08 2012-04-18 纳幕尔杜邦公司 Process of using an improved flue in a titanium dioxide process
JP2011075123A (en) * 2009-09-29 2011-04-14 Sumitomo Light Metal Ind Ltd Aluminum internally-grooved heat transfer tube
US20150267970A1 (en) * 2014-03-18 2015-09-24 Grand Hall Enterprise Co., Ltd. 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
CN104613646A (en) * 2015-01-27 2015-05-13 胡桂林 Heat exchange sheet
US20180202724A1 (en) * 2017-01-19 2018-07-19 Dong Yong Hot Water System Inc. Conductive structure of heat exchange pipe

Also Published As

Publication number Publication date
EP1617139A1 (en) 2006-01-18
ITMN20040019A1 (en) 2004-10-13
EP1617139B1 (en) 2016-08-31
PL1617139T3 (en) 2017-02-28
ES2612012T3 (en) 2017-05-11

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Legal Events

Date Code Title Description
AS Assignment

Owner name: UNICAL AG S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:JAHIER, GIOVANNI;REEL/FRAME:017884/0441

Effective date: 20060413

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION