US3326282A - Arrangement for fastening spiral wire spacers in tubular heat exchangers - Google Patents

Arrangement for fastening spiral wire spacers in tubular heat exchangers Download PDF

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US3326282A
US3326282A US524396A US52439666A US3326282A US 3326282 A US3326282 A US 3326282A US 524396 A US524396 A US 524396A US 52439666 A US52439666 A US 52439666A US 3326282 A US3326282 A US 3326282A
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tube
tubes
arrangement
tubular heat
heat exchangers
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US524396A
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Sverre K Jenssen
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Rosenblads Patenter AB
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Rosenblads Patenter AB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/06—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits having a single U-bend
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • 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
    • F28F9/0137—Auxiliary supports for elements for tubes or tube-assemblies formed by wires, e.g. helically coiled
    • 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
    • Y10S165/454—Heat exchange having side-by-side conduits structure or conduit section
    • Y10S165/492—Plural conduits with ends connected to tube plate

Definitions

  • the heat exchanger has a tube bundle which is mounted in a tube sheet and extending generally normal thereto, such tube bundle containing rows of parallel tubes in spaced relation. Every third tube in each row thereof is encircled by a helical wire which spaces adjacent tubes from the encircled tube.
  • the arrangement of the invention includes thin metal wall members extending between adjacent rows of tubes adjacent each end of the helical wires, means to secure the wall members in fixed relation with respect to the tube sheet, and means securing the ends of the helical wires to the respective wall members.
  • the invention concerns an arrangement wherein the helical wire can be fastened without the mentioned difiiculties and is characterized mainly in that this helical wire at each end is secured to a thin metal sheet wall which is fastened in fixed relationship with respect to the tube sheet and is arranged in the interspace between a row of tubes in which the tube encircled by the wire helix is located and an adjacent row of tubes.
  • FIG. 1 illustrates a side sectional view of a tubular heat exchanger provided with fastening device according to the present invention
  • FIG. 2 shows a cross section view of the tube bundle taken along line IIII in FIG. 1 showing the positions of the tubes and the fastening devices respectively;
  • FIG. 3 shows a fragment III of the cross section view of FIG. 2 in a larger scale
  • FIG. 4 shows a side sectional view of a further embodiment of a heat exchanger according to the invention.
  • FIG. 1 a bundle. of tubes 1 is mounted in a thick tube sheet or end wall 2.
  • the tubes are bent like a U around a partition 3 which is also fastened to the tube sheet and diametrically divides the space in the cylindrical container or shell 4 surrounding the tube bundle and closed by the tube sheet.
  • One of the heat exchange mediums is for example led into the container 4 via connection piece 5 and out via connection piece 6 while another heat exchange medium passes through the tubes, suitably in counterflow, in via connection piece 7 and chamber 8 and out via distribution chamber 9 and connection piece 10.
  • every third tube 1 of each row thereof is encircled by a helical wire 12, the other tubes being free from helical wires.
  • the tubes 1 (indicated only in FIG. 2) are arranged on a triangular pitch in rows on both sides of partition 3 which is furnished with wings 11a, 11b of thin sheet metal extending out from respective sides of the partition.
  • each helical wire 12 surrounding a tube has one end welded against the side of wing 11a and its other end welded against the side of wing 11b.
  • the partition 3, being fastened to the tube sheet 2, thus indirectly fastens the wall members 11a, 11b to the tube sheet.
  • the tube sheet, tubes with helical wires, and partition with wings together form a tube bundle removable from shell 4.
  • This removable construction may be assembled in the following manner: The tubes, with and without helical wires, are introduced in horizontal position into the tube sheet, horizontal row after horizontal row starting from below and building upward. After each row is completed Wings 11a, 11b are placed on top of the row and welded to the partition. The ends of the helical wires are welded to the free upper side of these wings. Thereafter the next row of tubes is introduced and the next sheets are applied whereupon the next welding operations are carried out etc. until the tube bundle is completed. In this manner the welding can be easily performed with a good heat balance between the wire and the thin wing.
  • FIGURE 4 shows as an example an embodiment of a heat exchanger with a removable tube bundle having straight tubes.
  • the straight tubes la extend between an upper tube sheet 2 and a lower tube sheet 2a which is tightly fitted into the lower portion of shell 4a by means of a packing in groove 13.
  • the top of the shell 4a is closed by the upper tube sheet.
  • a partition 3a also extends between the tube sheets and this partition is furnished with wings 11a and 11b to which the ends of helical wires 12 are fastened.
  • first heat exchanging medium is for example led in through the shell 4a via the two connection pieces in and out via the two connection pieces 6a, while the other heat exchanging medium is led through the tubes, suitably in counterflow, in via connection piece 7a and chamber 8a and out via chamber 9a and connection piece 1011.
  • single connection pieces 5a and 6a so that the first heat exchanging medium is distributed on both sides of partition 31: and/ or this partition may be replaced by another arrangement for anchoring wings 11a, 11b which does not partition the shell.
  • the center portion of the partition between the two groups of wings may be omitted.
  • a tubular heat exchanger having a tube bundle and a tube sheet mounting the tube bundle, said tube bundle containing rows of parallel tubes in spaced relation extending from the tube sheet generally normal thereto, and a helical wire encircling every third tube of each row thereof to space adjacent tubes from the wire-encircled tube
  • the improved arrangement for fastening the helical wires which comprises thin sheet metal wall members extending between adjacent rows of tubes adjacent each 10 end of the helical wires, means to secure the wall members in fixed relationship with respect to the tube sheet, and means securing the ends of the helical wires to the respective wall members.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Description

June 20, 1967 s JENSSEN 3,326,282
ARRANGEMENT FOR FASTENING SPIRAL WIRE SPACERS IN TUBULAR HEAT EXGHANGERS Filed Feb. 2, 1966 INVEN'IOR.
SVERRE K. JENSSEA/ ATTORNEY United States Patent 3,326,282 ARRANGEMENT FOR FASTENING SPIRAL WIRE SPACERS IN TUBULAR HEAT EXEHANGERS Sverre K. .Ienssen, Saltsjobaden, Sweden, assignor to AB Rosenblads Patenter, Stockholm, Sweden, a corporation of Sweden Filed Feb. 2, 1966, Ser. No. 524,396 Claims priority, application Sweden, Feb. 8, 1965, 1,564/65 1 Claim. (Cl. 165172) ABSTRACT OF THE DISCLOSURE An arrangement for fastening spiral wire spacers in a tubular heat exchanger. The heat exchanger has a tube bundle which is mounted in a tube sheet and extending generally normal thereto, such tube bundle containing rows of parallel tubes in spaced relation. Every third tube in each row thereof is encircled by a helical wire which spaces adjacent tubes from the encircled tube.
The arrangement of the invention includes thin metal wall members extending between adjacent rows of tubes adjacent each end of the helical wires, means to secure the wall members in fixed relation with respect to the tube sheet, and means securing the ends of the helical wires to the respective wall members.
It has been knewn previously to maintain the wire helix extended around the tube fastened in place by welding its ends either to the tube or to the tube sheet between the adjacent tubes. However, both of these methods involve considerable disadvantages. Thus, when welding the wire to the tube it is difficult to avoid burning through the tube wall, and when welding to the tube sheet difiiculty arises first because there is little space for the welding and second because of the poor temperature balance which during welding arises between the tube sheet and the wire which is thin compared to the tube sheet. This temperature unbalance is particularly troublesome when thick tube sheets are involved.
The invention concerns an arrangement wherein the helical wire can be fastened without the mentioned difiiculties and is characterized mainly in that this helical wire at each end is secured to a thin metal sheet wall which is fastened in fixed relationship with respect to the tube sheet and is arranged in the interspace between a row of tubes in which the tube encircled by the wire helix is located and an adjacent row of tubes.
The invention will now be more fully described with reference to the accompanying drawing wherein:
FIG. 1 illustrates a side sectional view of a tubular heat exchanger provided with fastening device according to the present invention;
FIG. 2 shows a cross section view of the tube bundle taken along line IIII in FIG. 1 showing the positions of the tubes and the fastening devices respectively;
FIG. 3 shows a fragment III of the cross section view of FIG. 2 in a larger scale; and
FIG. 4 shows a side sectional view of a further embodiment of a heat exchanger according to the invention.
All figures are merely schematic and are intended to serve as examples only, without limiting the invention. Identical details are designated with the same reference characters in the various figures.
In FIG. 1 a bundle. of tubes 1 is mounted in a thick tube sheet or end wall 2. The tubes are bent like a U around a partition 3 which is also fastened to the tube sheet and diametrically divides the space in the cylindrical container or shell 4 surrounding the tube bundle and closed by the tube sheet. One of the heat exchange mediums is for example led into the container 4 via connection piece 5 and out via connection piece 6 while another heat exchange medium passes through the tubes, suitably in counterflow, in via connection piece 7 and chamber 8 and out via distribution chamber 9 and connection piece 10.
As shown in FIG. 3, every third tube 1 of each row thereof is encircled by a helical wire 12, the other tubes being free from helical wires. The tubes 1 (indicated only in FIG. 2) are arranged on a triangular pitch in rows on both sides of partition 3 which is furnished with wings 11a, 11b of thin sheet metal extending out from respective sides of the partition. According to the invention each helical wire 12 surrounding a tube has one end welded against the side of wing 11a and its other end welded against the side of wing 11b. The partition 3, being fastened to the tube sheet 2, thus indirectly fastens the wall members 11a, 11b to the tube sheet.
The tube sheet, tubes with helical wires, and partition with wings together form a tube bundle removable from shell 4. This removable construction may be assembled in the following manner: The tubes, with and without helical wires, are introduced in horizontal position into the tube sheet, horizontal row after horizontal row starting from below and building upward. After each row is completed Wings 11a, 11b are placed on top of the row and welded to the partition. The ends of the helical wires are welded to the free upper side of these wings. Thereafter the next row of tubes is introduced and the next sheets are applied whereupon the next welding operations are carried out etc. until the tube bundle is completed. In this manner the welding can be easily performed with a good heat balance between the wire and the thin wing.
The possibility of applying the invention in this manner is, of course based on the provision of the removable tube bundle but it is not essential that the tubes be U-shaped for practicing the invention. FIGURE 4 shows as an example an embodiment of a heat exchanger with a removable tube bundle having straight tubes. The straight tubes la extend between an upper tube sheet 2 and a lower tube sheet 2a which is tightly fitted into the lower portion of shell 4a by means of a packing in groove 13. The top of the shell 4a is closed by the upper tube sheet. A partition 3a also extends between the tube sheets and this partition is furnished with wings 11a and 11b to which the ends of helical wires 12 are fastened. In this embodiment individual tubes, even those which are provided with helical wires, may easily be replaced because the wire remains in place in the bundle when such a tube is drawn out. The first heat exchanging medium is for example led in through the shell 4a via the two connection pieces in and out via the two connection pieces 6a, while the other heat exchanging medium is led through the tubes, suitably in counterflow, in via connection piece 7a and chamber 8a and out via chamber 9a and connection piece 1011. Of course it is also possible to arrange single connection pieces 5a and 6a so that the first heat exchanging medium is distributed on both sides of partition 31: and/ or this partition may be replaced by another arrangement for anchoring wings 11a, 11b which does not partition the shell. For example the center portion of the partition between the two groups of wings may be omitted.
Instead of welding the ends of the helical wires they may be hooked fast to the wings as is shown by the dashed lines It in FIG. 1 and FIG. 3.
What I claim is:
In a tubular heat exchanger having a tube bundle and a tube sheet mounting the tube bundle, said tube bundle containing rows of parallel tubes in spaced relation extending from the tube sheet generally normal thereto, and a helical wire encircling every third tube of each row thereof to space adjacent tubes from the wire-encircled tube, the improved arrangement for fastening the helical wires which comprises thin sheet metal wall members extending between adjacent rows of tubes adjacent each 10 end of the helical wires, means to secure the wall members in fixed relationship with respect to the tube sheet, and means securing the ends of the helical wires to the respective wall members.
4 References Cited UNITED STATES PATENTS 2,774,575 12/1956 Walter 165158 X FOREIGN PATENTS 188,589 1/1957 Austria. 644,651 10/ 1950 Great Britain. 685,848 1/1953 Great Britain. 153,613 3/1956 Sweden.
ROBERT A. OLEARY, Primary Examiner.
A. W. DAVIS, Assistant Examiner.
US524396A 1965-02-08 1966-02-02 Arrangement for fastening spiral wire spacers in tubular heat exchangers Expired - Lifetime US3326282A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643735A (en) * 1970-03-10 1972-02-22 Modine Mfg Co Fin and tube heat exchanger
US4204570A (en) * 1978-02-23 1980-05-27 Foster Wheeler Energy Corporation Helical spacer for heat exchanger tube bundle
US4796695A (en) * 1983-06-30 1989-01-10 Phillips Petroleum Company Tube supports
US5472047A (en) * 1993-09-20 1995-12-05 Brown Fintube Mixed finned tube and bare tube heat exchanger tube bundle
WO2002029349A1 (en) * 2000-10-04 2002-04-11 Joseph Kaellis Heat exchanger
US20030178187A1 (en) * 2002-03-22 2003-09-25 Wanni Amar S. Heat exchanger flow-through tube supports
US6736199B2 (en) 2002-04-23 2004-05-18 Exxonmobil Research And Engineering Company Heat exchanger with floating head
US6779596B2 (en) 2002-03-22 2004-08-24 Exxonmobil Research And Engineering Company Heat exchanger with reduced fouling
US6808017B1 (en) * 1999-10-05 2004-10-26 Joseph Kaellis Heat exchanger
US20060108107A1 (en) * 2004-11-19 2006-05-25 Advanced Heat Transfer, Llc Wound layered tube heat exchanger
US20060108108A1 (en) * 2004-11-19 2006-05-25 Naukkarinen Olli P Spirally wound, layered tube heat exchanger and method of manufacture
US20060162913A1 (en) * 2004-10-12 2006-07-27 Wanni Amar S Support system for tube bundle devices
US20150083365A1 (en) * 2013-09-25 2015-03-26 Westinghouse Electric Company Llc Steam generator and method of securing tubes within a steam generator against vibration

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB644651A (en) * 1948-03-19 1950-10-18 Parsons C A & Co Ltd Improvements in or relating to tubular heat exchangers
GB685848A (en) * 1950-01-24 1953-01-14 Vickers Electrical Co Ltd Improvements relating to the construction of tubular heat exchangers
US2774575A (en) * 1952-03-07 1956-12-18 Worthington Corp Regenerator
AT188589B (en) * 1954-02-18 1957-01-25 Rosenblads Patenter Ab Process for the construction of tubular heat exchangers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB644651A (en) * 1948-03-19 1950-10-18 Parsons C A & Co Ltd Improvements in or relating to tubular heat exchangers
GB685848A (en) * 1950-01-24 1953-01-14 Vickers Electrical Co Ltd Improvements relating to the construction of tubular heat exchangers
US2774575A (en) * 1952-03-07 1956-12-18 Worthington Corp Regenerator
AT188589B (en) * 1954-02-18 1957-01-25 Rosenblads Patenter Ab Process for the construction of tubular heat exchangers

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3643735A (en) * 1970-03-10 1972-02-22 Modine Mfg Co Fin and tube heat exchanger
US4204570A (en) * 1978-02-23 1980-05-27 Foster Wheeler Energy Corporation Helical spacer for heat exchanger tube bundle
US4796695A (en) * 1983-06-30 1989-01-10 Phillips Petroleum Company Tube supports
US5472047A (en) * 1993-09-20 1995-12-05 Brown Fintube Mixed finned tube and bare tube heat exchanger tube bundle
US6808017B1 (en) * 1999-10-05 2004-10-26 Joseph Kaellis Heat exchanger
WO2002029349A1 (en) * 2000-10-04 2002-04-11 Joseph Kaellis Heat exchanger
US6779596B2 (en) 2002-03-22 2004-08-24 Exxonmobil Research And Engineering Company Heat exchanger with reduced fouling
US20030178187A1 (en) * 2002-03-22 2003-09-25 Wanni Amar S. Heat exchanger flow-through tube supports
US6874572B2 (en) 2002-03-22 2005-04-05 Exxonmobil Research And Engineering Company Heat exchanger flow-through tube supports
US6736199B2 (en) 2002-04-23 2004-05-18 Exxonmobil Research And Engineering Company Heat exchanger with floating head
US20060162913A1 (en) * 2004-10-12 2006-07-27 Wanni Amar S Support system for tube bundle devices
US7117935B2 (en) * 2004-10-12 2006-10-10 Exxonmobil Research And Engineering Company Support system for tube bundle devices
US20060108107A1 (en) * 2004-11-19 2006-05-25 Advanced Heat Transfer, Llc Wound layered tube heat exchanger
US20060108108A1 (en) * 2004-11-19 2006-05-25 Naukkarinen Olli P Spirally wound, layered tube heat exchanger and method of manufacture
US7546867B2 (en) 2004-11-19 2009-06-16 Luvata Grenada Llc Spirally wound, layered tube heat exchanger
WO2007076314A2 (en) 2005-12-21 2007-07-05 Luvata Grenada Llc Spirally wound, layered tube heat exchanger and method of manufacture
US20150083365A1 (en) * 2013-09-25 2015-03-26 Westinghouse Electric Company Llc Steam generator and method of securing tubes within a steam generator against vibration
EP3050063A4 (en) * 2013-09-25 2017-06-07 Westinghouse Electric Company Llc Steam generator and method of securing tubes within a steam generator against vibration

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