US3782455A - Heat exchanger tube mounts - Google Patents

Heat exchanger tube mounts Download PDF

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Publication number
US3782455A
US3782455A US00248842A US3782455DA US3782455A US 3782455 A US3782455 A US 3782455A US 00248842 A US00248842 A US 00248842A US 3782455D A US3782455D A US 3782455DA US 3782455 A US3782455 A US 3782455A
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US
United States
Prior art keywords
tube
tubes
bars
heat exchanger
supports
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.)
Expired - Lifetime
Application number
US00248842A
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English (en)
Inventor
W Wolowodiuk
J Anelli
B Dawson
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.)
US Atomic Energy Commission (AEC)
Original Assignee
US Atomic Energy Commission (AEC)
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by US Atomic Energy Commission (AEC) filed Critical US Atomic Energy Commission (AEC)
Application granted granted Critical
Publication of US3782455A publication Critical patent/US3782455A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/16—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour
    • F22B1/162—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being hot liquid or hot vapour, e.g. waste liquid, waste vapour in combination with a nuclear installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0133—Auxiliary supports for elements for tubes or tube-assemblies formed by concentric strips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/40—Shell enclosed conduit assembly
    • Y10S165/401—Shell enclosed conduit assembly including tube support or shell-side flow director
    • Y10S165/416—Extending transverse of shell, e.g. fin, baffle
    • Y10S165/423—Bar

Definitions

  • a heat exchanger in wh1ch tubes are secured to a tube sheet by internal bore welding, which tubes may be [52] US. Cl. 165/162, 122/510 moved into place in preparation for welding with [5]] lift.
  • Ci F28b 9/00 paratively file trouble A number f segmented tube Fleld 0f Search 72, Support plates are provided allow a consider able portion of each of the tubes to be moved laterally [56] References cued after the end thereof has been positioned in prepara-- UNITED STATES PATENTS tion for internal bore welding to the tube sheet.
  • the tubes are each butt welded to tube sheets, .usually at spigots projecting from the sheets.
  • the tubes are internal bore welded between two tube sheets, it is impossible to move the tubes coaxially into position for welding because the tubes do not pass through the sheets. This creates a construction problem in heat exchangers where tube supporting structure is positioned between the tube sheets to prevent the tubes from being moved laterally between the sheets.
  • a heat exchanger with at leastone tube sheet and a plurality of tubes which are supported along their length is provided with tube supports which have a number of circumferential bars which extend on each side of eachtube and which are supported by a plurality of radial support bars and which can be secured tolthe radial bars after tubeshave been moved radially into position to permanently support the tubes.
  • FIG. 1 shows a portion of a tube and tube sheet heat exchanger employing the tube supports of the present invention
  • FIG. 2 is a view in perspective showing a portion of one of the tube supports of FIG. 1;
  • FIG. 3 is a view, partly in section, showing how the circumferential bars of the present invention support the heat exchanger tubes;
  • FIG. 4 is a plan view of one of the radial support bars shown in FIG. 2;
  • FIG. 5 is a view, partly in section, showing how the circumferential support bars are secured to the radial bars.
  • FIG. 6 is an enlarged view showing the tube supports and their securement to the tube sheet.
  • FIG. 1 shows a portion of a heat exchanger made in accordance with the present invention.
  • the heat exchanger designated generally as 10 has an outer shell 12 which is generally cylindrical, being tapered inward at the bottom 14 so that it is essentially closed at the bottom.
  • the primary fluid enters at the primary inlet 16 to flow inward until it impinges against an annular shroud 18 to flow upward and over the top of the shroud l8 and then downward through a tube section 20within the shroud 18 until itis below a seal 22 which is between the shroud l8 and shell 12 at a location below the intake 16.
  • the primary fluid then flows radially outward through openings in the shroud 18 to the space between the shroud l8 and the outer shell 12 to flow downward between them and out of the heat exchanger through the primary outlet 24.
  • the seal 22 creates a stagnant annular layer of primary fluid above it and between the shroud 18 and the shell 12.
  • the tube-section 20 includes two tube sheets, specifically an upper tube sheet 30 and a lower tube sheet 32 and a plurality of tubes 34 extending between the two tube sheets.
  • the tube sheets are annular and encircle a central conduit 36 which feeds secondary fluid downward to a lower chamber 38 which is defined by an annular perforated distribution ring 40 and an inverted dome 42 below the ring 40.
  • the secondary fluid then flows upward through the ring 40 and then through the tube sheet 32 and the tubes 34.
  • the tubes 34 are distributed in the annular spacebetween the central conduit 36 and the cylindrical shroud 18. After leaving the tubes 34, the secondary fluid flows through the annular upper tube sheet 30 to an upper chamber 44, where it is collected and led out of the heat exchanger 10.
  • the tubes 34 are supported along their length by a series of annular tube supports 51, 52, 53, 54, 55, 56, 57 and 58. These supports allow the primary fluid to flow downward through them and at the same time, support and properly space the tubes 34.
  • the central conduit 36, shroud l8, tube sheet 32 and tube support 58 define an annular body of stagnant primary fluid.
  • each of the tubes are bent. The bends allow for thermal expansion and contraction of each of the tubes .34 without tube failure.
  • the bent portions are each situated in an area of stagnant primary fluid so that no vibration will be created by the flow of the primary fluid over the bent portions of the tubes 34.
  • the tube supports 51, 52, 53 and 54 which can be referred to as solid tube supports, plates with holes drilled in them to accommodate the tubes 34 and the tie rods which will be described hereinafter.
  • the other tube supports, namely, 55, 56, 57 and 58 which can be referred to as segmental tube supports are constructed in sections as the tubes 34 are placed in position and welded.
  • the tubes closest to the central conduit 36 are first welded in place and the tubes immediately outward of those are welded and then the tube outward of those are welded in place. The tubes are thus progressively welded until all are in place.
  • segmental tube supports thus allow the tubes to be positioned while being distorted only slightly below the lower most solid support 54 so that the upper end of the tubes can be moved axially through the supports 54, 53, 52 and 51 until the end of the tube abutts against the tube sheet 30. Thereafter, the lower portion of the tube is moved laterally inward until the lower end is positioned against the lower tube sheet 32 for welding.
  • FIG. 2 A section of a segmented tube support is shown in FIG. 2. Essentially, it consists of a series of parallel curvilinear circumferential bars 60, each of which makes up a portion of one of a number of concentric circles.
  • the outermost circumferential bar 62 is slightly different in that it has a series of round holes through it so that it encircles the tubes which pass through the holes.
  • the circumferential bar 64 also has a series of smaller holes 66 which allow primary fluid to pass easily through.
  • FIG. 3 shows two adjacent circumferential bars 60 grasping several of the tubes 34. Notice that the inner side 68 ofthe upper circumferential bar 60 does not engage against the outer side 69 of the lower bar 60 as they appear in H6. 3.
  • Each of the circumferential bars 60 has along each side a number of spaced indentations 72 which conform to a portion of the outer surface of each of the engaged tubes 34. Since the sides of adjacent circumferential bars 60 do not touch, primary fluid passing parallel to the tubes 34 can pass downward through the circumferential bars 60.
  • each of the circumferential bars 60 and 62 passes over several radial bars 70.
  • the radial bars 70 one of which is shown by itself in FIG. 4, each have at their ends a hole 73 through which the tie rod (which will presently be described) pass.
  • the bars 70 also have a plurality of smaller holes 74 which are used to securely fasten the circumferential bars 60 and 62 to it.
  • FlG. 5 shows in cross section a bar supporting several of the circumferential bars 60.
  • the circumferential bars 60 have holes 76, each of which is aligned with one of the holes 74 in the radial bars 70.
  • a pin is inserted in each of the holes 74 and projects upward into one of the holes 74.
  • the pins do not extend upward to the upper surface of the bars 60 and do not extend downward to the lower surface of the radial bars 70.
  • the spaces above and below the pins 80 are filled with weld material 82 to secure the pins 80 in the bars 70 and the bars 60. The result, of course, is to firmly secure the circumferential bars 60 t0 the radial bars 70.
  • the radial bars 70 are secured to the central conduit 36.
  • the tubes 34 are then positioned with inner most tubes being positioned first. They are each bent slightly at their lower portion and moved axially through the supports 54, 53, 52 and 51 and into engagement with the tube sheet 30 where they are welded. The lower portions are then allowed to flex inward and as circumferential rows of tubes 34 are positioned, circumferential bars 60 are secured to the radial bars 70 to secure the tubes 34 in place.
  • the securement of the circumferential bars 60 to the radial bars 70 involves no more than aligning those bars so that the holes 74 are aligned with the holes 76.
  • the pins 80 are inserted into each of the aligned pair of holes 74 and 76 and the weld material 82 is added.
  • HO. 6 shows the radial bars 70 mounted in position.
  • Rods threaded at their ends are passed through holes 91 in the tube sheet 30 which holes lie on a circle adjacent to the conduit 36.
  • the rod 90 is secured from downward movement by bolts 92.
  • Vertical sleeves 94 are passed over the rods 90 until they abutt against the lower side of the tube sheet 30.
  • the uppermost solid support 51 is moved upwardly into place with the rods 94 passing through holes provided therein.
  • other sleeves 94 are moved upward over the rods 94 and the next lower solid support can be placed in position.
  • the outer end of each support is held up by a temporary rigging. This procedure is followed until all of the solid supports are in place and the segmented supports are ready for positioning.
  • each of the radial bars 70 has at its inner end a hole 73 which will accommodate tie rods 90 as the radial bar 70 is passed upward so that it engages the bottoms of the sleeve 94.
  • the degree to which the tubes 34 must be distorted at their lower portions becomes less and less.
  • the outermost circumferential bar 62 has holes 64 rather than recessions 72 in the side thereof so it cannot be moved sideways to clamp the outermost circumferential row of tubes. This is no problem because the tubes can be moved axially through the outermost circumferential bars 62 because very little flexing is necessary.
  • the radial bars 70 are supported at their outer ends by a temporary rig (not shown) until outer tie rods 98 and their associated sleeves 100 are in place. This is accomplished by aligning all of the sleeves 100 between all of the tube supports and then moving the tie rods 98 axially through the sleeves and the holes 73 at the outer ends of the radial bars 70. The rods are secured by bolts 102 from movement with respect to the tube sheets and the rigging at the outer ends of the radial bars is removed. 7
  • a tube support for a heat exchanger having a plurality of tubes for conveying fluid in heat exchange with fluid flowing outside of said tubes comprising:
  • circumferential bars supported on said radial bars, said circumferential bars each being on the circumference of one of a plurality of concentric circles and each having a plurality of recessions spaced along the sides thereof so that facing recessions on adjacent circumferential bars can grasp a cooling tube between them.
  • a heat exchanger having a plurality of tubes for conveying fluid in'heat exchange with fluid flowing outside of said tubes comprising:
  • each of said tube sup- 6 ports comprising:
  • circumferential bars supported on said radial bars, said circumferential bars each being on the circumference of one of a plurality of circles concentric to said first defined circle, each of said circumferential bars having a plurality of recessions spaced along the sides thereof so that facing recessions on adjacent circumferential bars can grasp a cooling tube between them;
  • said heat exchanger further comprising:
  • tie rods extending through and bolted to said tube sheet and extending through and supporting said radial bars.
  • the heat exchanger defined in claim 6 further comprising a second tube sheet, said tie rods extending through and bolted to said second tube sheet, further comprising additional sleeves encircling said tie rods and positioned between said second tube sheet and the support closest thereto.
  • the heat exchanger defined in claim 6 further comprising other tube supports, said other tube supports comprising solid plates with holes through which said tubes and said tie rods pass, said other supports being positioned between said first defined tube supports and said tube sheet, additional sleeves encircling said tie rods, some of said additional sleeves being positioned between said other tube supports, some of said additional sleeves being positioned between the other tube support closest to said tube sheet and said tube sheet.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US00248842A 1972-05-01 1972-05-01 Heat exchanger tube mounts Expired - Lifetime US3782455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24884272A 1972-05-01 1972-05-01

Publications (1)

Publication Number Publication Date
US3782455A true US3782455A (en) 1974-01-01

Family

ID=22940917

Family Applications (1)

Application Number Title Priority Date Filing Date
US00248842A Expired - Lifetime US3782455A (en) 1972-05-01 1972-05-01 Heat exchanger tube mounts

Country Status (7)

Country Link
US (1) US3782455A (zh)
JP (1) JPS4961743A (zh)
CA (1) CA964950A (zh)
DE (1) DE2320084A1 (zh)
FR (1) FR2183090B1 (zh)
GB (1) GB1422695A (zh)
SU (1) SU500770A3 (zh)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058161A (en) * 1974-12-05 1977-11-15 Georges Trepaud Heat exchanger
US4154295A (en) * 1977-02-02 1979-05-15 General Atomic Company Heat exchanger tube support assembly
US4573528A (en) * 1981-01-08 1986-03-04 Georges Trepaud Heat exchangers with clusters of straight or corrugated tubes, especially to systems for supporting the tubes at fixed and movable axial levels
US6772832B2 (en) * 2002-04-23 2004-08-10 Babcock & Wilcox Canada, Ltd. Heat exchanger tube support bar
US20070175488A1 (en) * 2006-01-27 2007-08-02 Usgi Medical Inc. Methods and apparatus for revision of obesity procedures
US20100254865A1 (en) * 2007-11-01 2010-10-07 Jae Suk Choi Hydrogen generating apparatus using steam reforming reaction
CN105091657A (zh) * 2015-08-28 2015-11-25 中国石油天然气集团公司 绕管式换热器端部直管段防振装置
US20180224219A1 (en) * 2015-07-06 2018-08-09 Casale Shell-and-tube equipment with antivibration baffles and related assembling method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5279358A (en) * 1975-12-26 1977-07-04 Hitachi Ltd Oil cooler
US4224983A (en) * 1978-02-02 1980-09-30 General Atomic Company Heat exchange apparatus for a reactor
DE3310061A1 (de) * 1982-11-19 1984-05-24 MTU Motoren- und Turbinen-Union München GmbH, 8000 München Verfahren zur herstellung einer rohrverteileranordnung sowie ein nach diesem verfahren gefertigter waermetauscher-sammelbehaelter
DE4031577A1 (de) * 1990-10-05 1992-04-09 Behr Gmbh & Co Waermetauscher
CN111486740B (zh) * 2020-04-23 2021-09-28 中国原子能科学研究院 换热器及其组装方法
CN113432454B (zh) * 2021-07-14 2022-12-06 哈尔滨锅炉厂有限责任公司 一种非圆形截面双管程螺旋式换热器管束结构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336974A (en) * 1965-05-05 1967-08-22 United Aircraft Corp Serpentine tube boiler
US3527261A (en) * 1968-11-12 1970-09-08 Babcock & Wilcox Co Tube guide apparatus
US3545534A (en) * 1967-12-01 1970-12-08 Atomic Power Constr Ltd Heat exchangers
US3595309A (en) * 1968-07-31 1971-07-27 Babcock & Wilcox Ltd Heat exchanger with helically coiled tubes
US3677339A (en) * 1970-01-15 1972-07-18 Alfred J Perrin Coiled tube banks

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB962011A (en) * 1961-10-23 1964-06-24 Foster Wheeler Ltd A method of supporting tubes in heat exchangers
FR1389229A (fr) * 1964-03-24 1965-02-12 Atomic Energy Authority Uk Perfectionnements aux échangeurs de chaleur
GB1280662A (en) * 1969-01-28 1972-07-05 Atomic Energy Authority Uk Improvements in or relating to tubular heat exchangers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3336974A (en) * 1965-05-05 1967-08-22 United Aircraft Corp Serpentine tube boiler
US3545534A (en) * 1967-12-01 1970-12-08 Atomic Power Constr Ltd Heat exchangers
US3595309A (en) * 1968-07-31 1971-07-27 Babcock & Wilcox Ltd Heat exchanger with helically coiled tubes
US3527261A (en) * 1968-11-12 1970-09-08 Babcock & Wilcox Co Tube guide apparatus
US3677339A (en) * 1970-01-15 1972-07-18 Alfred J Perrin Coiled tube banks

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4058161A (en) * 1974-12-05 1977-11-15 Georges Trepaud Heat exchanger
US4154295A (en) * 1977-02-02 1979-05-15 General Atomic Company Heat exchanger tube support assembly
US4573528A (en) * 1981-01-08 1986-03-04 Georges Trepaud Heat exchangers with clusters of straight or corrugated tubes, especially to systems for supporting the tubes at fixed and movable axial levels
US6772832B2 (en) * 2002-04-23 2004-08-10 Babcock & Wilcox Canada, Ltd. Heat exchanger tube support bar
US20070175488A1 (en) * 2006-01-27 2007-08-02 Usgi Medical Inc. Methods and apparatus for revision of obesity procedures
US8726909B2 (en) 2006-01-27 2014-05-20 Usgi Medical, Inc. Methods and apparatus for revision of obesity procedures
US20100254865A1 (en) * 2007-11-01 2010-10-07 Jae Suk Choi Hydrogen generating apparatus using steam reforming reaction
US20180224219A1 (en) * 2015-07-06 2018-08-09 Casale Shell-and-tube equipment with antivibration baffles and related assembling method
US10788273B2 (en) * 2015-07-06 2020-09-29 Casale Sa Shell-and-tube equipment with antivibration baffles and related assembling method
CN105091657A (zh) * 2015-08-28 2015-11-25 中国石油天然气集团公司 绕管式换热器端部直管段防振装置

Also Published As

Publication number Publication date
FR2183090B1 (zh) 1976-05-07
FR2183090A1 (zh) 1973-12-14
JPS4961743A (zh) 1974-06-14
SU500770A3 (ru) 1976-01-25
GB1422695A (en) 1976-01-28
DE2320084A1 (de) 1973-11-22
CA964950A (en) 1975-03-25

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