US3670811A - Protection-sleeve for finned-tubes of heat-exchanger core-unit - Google Patents
Protection-sleeve for finned-tubes of heat-exchanger core-unit Download PDFInfo
- Publication number
- US3670811A US3670811A US27906A US3670811DA US3670811A US 3670811 A US3670811 A US 3670811A US 27906 A US27906 A US 27906A US 3670811D A US3670811D A US 3670811DA US 3670811 A US3670811 A US 3670811A
- Authority
- US
- United States
- Prior art keywords
- sleeve
- strip
- finned
- tubes
- fins
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
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
- 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
- F28F9/0138—Auxiliary supports for elements for tubes or tube-assemblies formed by sleeves for finned tubes
-
- 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
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
Definitions
- ABSTRACT The essential concept of this invention involves a planar strip of flexible material of predetermined length and width having a series of slits formed therein to define small portions of the strip subject to being bent transversely to the plane of the strip to form tabs when the strip is converted into a sleeve for embracive positioning around groups of fins on a fluid-flow tube with the tabs disposed between fins to secure the sleeve against shifting axially of the tube.
- the main objects of this invention are; to provide an improved forrn of a planar strip of comparatively thin, narrow flexible material for formation into a simple sleeve for embracive location externally around the finned tubes; to provide a planar strip of this kind having-narrow portions thereof preformed to be disposed transversely to the plane of the strip formed sleeve for embracive position around groups of fins and secured against shifting axially of the tube; and to provide a pre-formed strip of this kind of such simple structure as to make highly economical the manufacturing and marketing thereof and exceedingly gratifying and profitable the use thereof by purchasers.
- FIG. 1 is a plan view of a relatively large heat-exchanger, for use with which these pre-forrned planar strips have been designed;
- FIG. 2 is a side view of what is shown in FIG. 1;
- FIG. 3 is an enlarged, plan view of a pre-formed, planar strip a number of which are shown in position in FIG. 1;
- FIG. 4 is a perspective view of a sleeve formed from a strip such as shown in FIG. 3;
- FIG. 5 is an enlarged, cross-sectional view of a group of tubes taken on the plane of the line 5-5 of FIG. 1, showing the positioned sleeves;
- FIG. 6 is a much-enlarged, side view of a positioned sleeve taken on the plane of the line 6-6 of FIG. 1.
- a protection sleeve for use with finned heat-exchanger tubes comprises a strip of comparatively thin, flexible material 10 of pre-determined dimension formed with a series of slits 11.
- the strip 10 is adapted to be converted into a sleeve 12 for embracive positioning around the peripheries of a group of fins mounted on the respective tube 15 with the portions of the strips 10, between the slits 11 disposed radially of the sleeve 12 to form tabs 14 extending axially of the sleeve 12.
- a requisite number of thusly protected finned tubes 15 have their opposite endsset in and bonded to conventional header plates.
- Such a completed core-unit then is secured to conventional tanks 16 with a suitable cross-braces 17 as shown in FIGS. 1 and 2.
- a sleeve adapted to be mounted on one or more of said finned tubes to prevent radial movement between adjacent tubes, said sleeve comprising, a planar strip of flexible material having a length greater than the circumference of the outer edges of said fins, and a plurality of pairs of closely spaced slits along each edge forming tabs, means for connecting the overlapping ends of said strip for embrasive positioning on the peripheral edges of said finned tube, said tabs being bent inwardly between the fins on said tube to retain the strip in a fixed axial position on said finned tube.
Abstract
The essential concept of this invention involves a planar strip of flexible material of predetermined length and width having a series of slits formed therein to define small portions of the strip subject to being bent transversely to the plane of the strip to form tabs when the strip is converted into a sleeve for embracive positioning around groups of fins on a fluid-flow tube with the tabs disposed between fins to secure the sleeve against shifting axially of the tube.
Description
United States Patent Christensen [4 1 June 20, 1972 [54] PROTECTION-SLEEVE FOR FINNED- TUBES OF HEAT-EXCHANGER CORE- UNIT [72] Inventor: Donald W. Christensen, Racine, Wis.
[73] Assignee: Young Radiator Company, Racine, Wis.
[22] Filed: April 13,1970
[21] Appl.No.: 27,906
[52] U.S.Cl... ..l65/134, 165/178 [51] Int. Cl ..F281'9/00 [58] Fieldofsearch ..165/l34, 67,158-160,
[56] References Cited UNITED STATES PATENTS 2,610,832 9/1952 Holmes et a1 ..165/l72 2,168,549 8/1939 Young ..l6S/l34 X 3,273,638 9/1966 Darling. 165/ l 34 2,402,209 6/1946 Ryder 165/ l 78 Primary Examiner-Frederick L. Matteson Assistant Examiner-'Iheophil W. Streule Attomey-Edwin Phelps 5?] ABSTRACT The essential concept of this invention involves a planar strip of flexible material of predetermined length and width having a series of slits formed therein to define small portions of the strip subject to being bent transversely to the plane of the strip to form tabs when the strip is converted into a sleeve for embracive positioning around groups of fins on a fluid-flow tube with the tabs disposed between fins to secure the sleeve against shifting axially of the tube.
2 China, 6 Drawing Figures PATENTEnMzo m2 8,670,811 sum 10F 2 in ii H H H H INVENTOR: DONALD W CHRISTENSEN BY v PATENTEDJUH 20 1912 W 1% WW; H Him I W sum 2 OF 2 FIG.5
INVENTOR. DONALD W CHRISTENSEN ATT'Y PROTECTION-SLEEVE FOR FINNED-TUBES OF HEAT- EXCHANGER CORE-UNIT In the current heat-exchanger industry, core-units of extensive sizes have to be produced for effecting temperature changes in fluids flowing through these core-units. At times these core-units may be from ten to twenty or more feet in axial length. Various facilities have had to be developed to counteract possible sagging of such dimensioned core-units.
Prior US. Pat. Nos. disclosing structures for such purpose include 3,420,296; 3,273,638; 2,775,433; 2,402,209; and 1,704,097. Each and every of these disclosures inheres limitations because of problems in production and/or in use.
The main objects of this invention are; to provide an improved forrn of a planar strip of comparatively thin, narrow flexible material for formation into a simple sleeve for embracive location externally around the finned tubes; to provide a planar strip of this kind having-narrow portions thereof preformed to be disposed transversely to the plane of the strip formed sleeve for embracive position around groups of fins and secured against shifting axially of the tube; and to provide a pre-formed strip of this kind of such simple structure as to make highly economical the manufacturing and marketing thereof and exceedingly gratifying and profitable the use thereof by purchasers.
In the adaptation shown in the accompanying drawings;
FIG. 1 is a plan view of a relatively large heat-exchanger, for use with which these pre-forrned planar strips have been designed;
FIG. 2 is a side view of what is shown in FIG. 1;
FIG. 3 is an enlarged, plan view of a pre-formed, planar strip a number of which are shown in position in FIG. 1;
FIG. 4 is a perspective view of a sleeve formed from a strip such as shown in FIG. 3;
FIG. 5 is an enlarged, cross-sectional view of a group of tubes taken on the plane of the line 5-5 of FIG. 1, showing the positioned sleeves; and
FIG. 6 is a much-enlarged, side view of a positioned sleeve taken on the plane of the line 6-6 of FIG. 1.
Heretofore, core-units of these dimensions, on occasion, have been faulted because of the tendency to sag radially. Often this causes the fins on adjacent tubes becoming intermeshed. The result is a lowering of the heat-transfer with a consequent increase in air-pressure demanding a greater horse-power for the motor driving the fan.
A protection sleeve for use with finned heat-exchanger tubes, embodying the foregoing concept, comprises a strip of comparatively thin, flexible material 10 of pre-determined dimension formed with a series of slits 11. The strip 10 is adapted to be converted into a sleeve 12 for embracive positioning around the peripheries of a group of fins mounted on the respective tube 15 with the portions of the strips 10, between the slits 11 disposed radially of the sleeve 12 to form tabs 14 extending axially of the sleeve 12.
Large core-units, such as shown in FIGS. 1 and 2, for use with which these pre-formed strips 10 of flexible material were designed for use, require a very special procedure for assembling. This begins with having the fin material 13 spiralled around, along and bonded to each tube 15 (FIG. 6). This being effected, several strips of the flexible material 10, with the tabs 14 turned inwardly, are set around the groups of fins 13 along each tube 15. The ends of each such strip 10 are overlapped and bonded together to form a sleeve (FIGS. 4 and 6).
A requisite number of thusly protected finned tubes 15 have their opposite endsset in and bonded to conventional header plates. Such a completed core-unit then is secured to conventional tanks 16 with a suitable cross-braces 17 as shown in FIGS. 1 and 2.
A number of such completed heat-exchangers then are ready for shipment and/or storage, as existing conditions require. In either instance these sleeves l2, spaced along each tube serve to prevent satgging of adjacent tubes.
Variations and mod: cations in the details of structure and arrangement of the parts may be resorted to within the spirit and coverage of the appended claims.
I claim:
1. In a heat exchanger having a core unit formed of a plurality of finned tubes, a sleeve adapted to be mounted on one or more of said finned tubes to prevent radial movement between adjacent tubes, said sleeve comprising, a planar strip of flexible material having a length greater than the circumference of the outer edges of said fins, and a plurality of pairs of closely spaced slits along each edge forming tabs, means for connecting the overlapping ends of said strip for embrasive positioning on the peripheral edges of said finned tube, said tabs being bent inwardly between the fins on said tube to retain the strip in a fixed axial position on said finned tube.
2. In a heat exchanger according to claim 5 wherein a sleeve is mounted on each finned tube, each sleeve being located in a common plane with the adjacent sleeve.
Claims (2)
1. In a heat exchanger having a core unit formed of a plurality of finned tubes, a sleeve adapted to be mounted on one or more of said finned tubes to prevent radial movement between adjacent tubes, said sleeve comprising, a planar strip of flexible material having a length greater than the circumference of the outer edges of said fins, and a plurality of pairs of closely spaced slits along each edge forming tabs, means for connecting the overlapping ends of said strip for embrasive positioning on the peripheral edges of said finned tube, said tabs being bent inwardly between the fins on said tube to retain the strip in a fixed axial position on said finned tube.
2. In a heat exchanger according to claim 5 wherein a sleeve is mounted on each finned tube, each sleeve being located in a common plane with the adjacent sleeve.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US2790670A | 1970-04-13 | 1970-04-13 |
Publications (1)
Publication Number | Publication Date |
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US3670811A true US3670811A (en) | 1972-06-20 |
Family
ID=21840457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US27906A Expired - Lifetime US3670811A (en) | 1970-04-13 | 1970-04-13 | Protection-sleeve for finned-tubes of heat-exchanger core-unit |
Country Status (1)
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4245694A (en) * | 1979-01-29 | 1981-01-20 | Exxon Research & Engineering Co. | Supports for closely spaced tubes |
DE3017574A1 (en) * | 1980-05-08 | 1981-11-12 | Wieland-Werke Ag, 7900 Ulm | COAXIAL TUBE SYSTEM FOR HEAT TRANSFER BETWEEN LIQUIDS OR GASES |
US20110034773A1 (en) * | 2009-08-10 | 2011-02-10 | Olympus Corporation | Endoscope apparatus |
US10580554B1 (en) * | 2018-06-25 | 2020-03-03 | Raymond Innovations, Llc | Apparatus to provide a soft-start function to a high torque electric device |
US11394198B2 (en) | 2019-02-26 | 2022-07-19 | Raymond Innovations, Llc | Soft starter for high-current electric devices |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2168549A (en) * | 1937-05-28 | 1939-08-08 | Fred M Young | Core fin binder strip |
US2402209A (en) * | 1944-06-29 | 1946-06-18 | Support for finned tubes | |
US2610832A (en) * | 1947-08-02 | 1952-09-16 | Gen Motors Corp | Condenser |
US3273638A (en) * | 1964-07-01 | 1966-09-20 | Raymond A Darling | Finned tube protector |
-
1970
- 1970-04-13 US US27906A patent/US3670811A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2168549A (en) * | 1937-05-28 | 1939-08-08 | Fred M Young | Core fin binder strip |
US2402209A (en) * | 1944-06-29 | 1946-06-18 | Support for finned tubes | |
US2610832A (en) * | 1947-08-02 | 1952-09-16 | Gen Motors Corp | Condenser |
US3273638A (en) * | 1964-07-01 | 1966-09-20 | Raymond A Darling | Finned tube protector |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4245694A (en) * | 1979-01-29 | 1981-01-20 | Exxon Research & Engineering Co. | Supports for closely spaced tubes |
DE3017574A1 (en) * | 1980-05-08 | 1981-11-12 | Wieland-Werke Ag, 7900 Ulm | COAXIAL TUBE SYSTEM FOR HEAT TRANSFER BETWEEN LIQUIDS OR GASES |
US4392526A (en) * | 1980-05-08 | 1983-07-12 | Wieland Werke Ag | Concentric tube heat exchanger with spacer |
DK151513B (en) * | 1980-05-08 | 1987-12-07 | Wieland Werke Ag | SPACES FOR COAXIAL HEAT EXCHANGE |
US20110034773A1 (en) * | 2009-08-10 | 2011-02-10 | Olympus Corporation | Endoscope apparatus |
US8900132B2 (en) * | 2009-08-10 | 2014-12-02 | Olympus Corporation | Endoscope apparatus |
US10580554B1 (en) * | 2018-06-25 | 2020-03-03 | Raymond Innovations, Llc | Apparatus to provide a soft-start function to a high torque electric device |
US11394198B2 (en) | 2019-02-26 | 2022-07-19 | Raymond Innovations, Llc | Soft starter for high-current electric devices |
US11811220B2 (en) | 2019-02-26 | 2023-11-07 | Raymond Innovations, Llc | Soft starter for high-current electric devices |
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