US3907031A - Tubular apparatus, in particular a steam generator - Google Patents

Tubular apparatus, in particular a steam generator Download PDF

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Publication number
US3907031A
US3907031A US426573A US42657373A US3907031A US 3907031 A US3907031 A US 3907031A US 426573 A US426573 A US 426573A US 42657373 A US42657373 A US 42657373A US 3907031 A US3907031 A US 3907031A
Authority
US
United States
Prior art keywords
frame
grating
tubes
series
bars
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
US426573A
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English (en)
Inventor
Helmut Tegethoff
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade AG
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 Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Application granted granted Critical
Publication of US3907031A publication Critical patent/US3907031A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F28F9/0135—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening
    • 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
    • Y10S165/405—Extending in a longitudinal direction
    • Y10S165/407—Extending in a longitudinal direction internal casing or tube sleeve
    • Y10S165/409—Extending in a longitudinal direction internal casing or tube sleeve including transverse element, e.g. fin, baffle
    • Y10S165/41—Movable internal casing connecting to transverse element

Definitions

  • the present invention concerns a tubular apparatus, in particular a steam generator, in the casing of which straight or U-shaped tubes are installed which are maintained at a certain distance of each other by unevenly spaced gratings, with the grating bars being fastened in a frame encircling the tube bundle.
  • the grating bars are fixed to the frame by welding.
  • the gratings are relatively rigid. If they are not accurately aligned or if the grating bars become distorted e.g., by welding, threading the tubes is difficult or the tubes might even by damaged by fluting.
  • the tube bundle cannot be installed in various instances before the shell of the tubular apparatus is fixed to the tube sheet so that the tubes must then be blindly inserted through the gratings.
  • the tubular apparatuses having a large shell diameter help in inserting the bars can be given by the assembly personnel provided manways permittingaccess are arranged in the grating structures.
  • the task to be accomplished by the present invention was to simplify the threading of tubes in a tubular apparatus of the design specified at the beginning and to improve working conditions during assembly.
  • this purpose is achieved by providing holders in the grating frames into which the grating bars can be plugged.
  • the grating structure of the tubular apparatus is so designed as to incorporate recesses in the front faces of the frame into which the holders are inserted, with the holders having a slot in their side which is in alignment with a recess in the frame inner side and with the grating bar engaging with the recess in the frame inner side through the slot provided in the holder.
  • the grating bars not being welded direct to the frame, the danger of bar distortion is eliminated in tubular apparatuses incorporating the present invention.
  • the recesses in the frame front-side and the frame inner side can be accurately made so that the gratings can be installed to be completely congruent. If the holders used have a circular cross-section the gratings are of a certain elasticity since the holders can rotate by a certain amount in the frame recesses which in this case are bores.
  • the main advantage of a tubular apparatus incorporating the present invention is that the grating bars can also be plugged into the frames as late as in the tube fitting stage. This permits the adoption of a basically new assembly technique.
  • the present invention further provides for the use of grating structures where only part of the overall grating area is fitted with bars prior to installing the tubes.
  • the bars of the free grating area are plugged in while fitting the tubes and will be located horizontally in this part of the grating.
  • the grating halves initially fitted with bars are offset by 180 from each other within the tubular apparatus, permitting access to the apparatus while the tubes are installed without the need for any additional manways in the grating structures.
  • FIG. 1 is a longitudinal section of a tubular apparatus incorporating the features of the present invention.
  • FIG. 2 shows Detail A.
  • FIG. 3 represents Section IIIIII to FIG. 2.
  • FIG. 4 is a plan view of a grating at the beginning of the tube-fitting process.
  • the tubular apparatus in this case a steam generator, consists of a casing 1 into which U-shaped tubes 2 are installed. Within the casing l the bundle of tubes 2 is encased in a shell 3 extending down to near the tube sheet 4. Instead of U-tubes, straight tubes can be used as well.
  • the tubes 2 are fixed in the tube sheet 4 which is welded up with the casing 1. Assembly of the casing 1 with the tube sheet 4 and shell 3 is made prior to fitting the tubes 2.
  • the tubes 2 are maintained at a certain distance of each other by means of gratings 5.
  • An equal distance between the individual gratings 5 is ensured by the provision of spacers 6.
  • the grating structures 5 comprise an annular frame 7 with intermediate braces 8. On either front face the frame 7 is alternately provided with bores 9 into which a sleeve 10 is inserted. in their side the sleeves 10 have a slot 11 with a cross-section slightly larger than that of the grating bars 12. The slot length is smaller than the length of the sleeve 10.
  • two continuous grooves 13 are arranged in the frame 7 with a width slightly larger than the width of the grating bars 12.
  • the sleeves 10 are so inserted in the frame 7 that the slot 11 is in alignment with the groove 13.
  • the grating bar 12 is inserted into thegroove 13 of the frame 7 through slot 1 1 in sleeve 10 and so held in position.
  • the central brace 8 is likewise provided with holders as described above. Before being inserted into the annular frame 7 and the brace 8, the bars 12 are slightly bent. The process of insertion is facilitated by rotating the sleeves 10 in their bores. in addition, the bars 12 can be welded up with the sleeves 10.
  • the gratings can be installed into the casing l in completely pre-fabricated state, i.e., with mounted bars 12.
  • the above method of providing holders for the grating bars in the frame 7 also permits to insert the bars during tube fitting.
  • only part preferably one half of the grating is fitted with bars 12 initially and then inserted in the casing 1.
  • the bars are arranged in conformity with the specified triangular tube pitch at an angle of 60 or from the middle plane.
  • the grating bars 12 are preferably welded up with the sleeve 10. The bars 12 of the free grating area are only inserted into the casing 1 while installating the Utubes 2.
  • FIG. 4 shows these operations accomplished for the first two rows of tubes. In this section of the gratings the bars 12 are arranged horizontally.
  • the grating halves fitted with bars are offset by from each other so that the assembly personnel can climb through the respective free halves arranged alternately on the righthand and lefthand sides of the steam generator (see line 14 in FIG. 1) and help to thread the tubes from inside the casing. As tube-fitting progresses, the free sections of the gratings become smaller so that the last few tubes must be threaded blindly".
  • a spacer for the tubes of a heat exchanger. in particular a steam generator having a tube bundle comprising a plurality of grating structures, each grating structure comprising a series of grating bars, a ringshaped frame surrounding the tube bundle and having a series of bores formed in at least one face thereof and extending into said frame, and a series of grooves, one
  • each of said sleeves having a slot therein and rotatably mounted within one of said bores so that the slot is aligned with a respective groove.
  • said frame further comprises a central brace for dividing said frame into two sections, the faces of said central brace forming part of said faces of said frame, whereby the rods are mounted in said frame by engaging each end thereof with a sleeve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US426573A 1972-12-21 1973-12-20 Tubular apparatus, in particular a steam generator Expired - Lifetime US3907031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2262621A DE2262621C3 (de) 1972-12-21 1972-12-21 Abstandshalter für die Rohre eines ein Rohrbündel aus geraden oder U-förmig gebogenen Rohren aufweisenden Röhrenapparates, insbesondere Dampferzeugers, und Verfahren zu dessen Berohrung

Publications (1)

Publication Number Publication Date
US3907031A true US3907031A (en) 1975-09-23

Family

ID=5865068

Family Applications (1)

Application Number Title Priority Date Filing Date
US426573A Expired - Lifetime US3907031A (en) 1972-12-21 1973-12-20 Tubular apparatus, in particular a steam generator

Country Status (7)

Country Link
US (1) US3907031A (xx)
JP (1) JPS49101701A (xx)
DE (1) DE2262621C3 (xx)
FR (1) FR2211615B3 (xx)
GB (1) GB1439690A (xx)
IT (1) IT1000957B (xx)
SE (1) SE388928B (xx)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967677A (en) * 1975-05-28 1976-07-06 Mobil Oil Corporation Heat exchanger baffles
US4021204A (en) * 1975-06-09 1977-05-03 Breda Termomeccanica S.P.A. Method of manufacturing a grill-type support comprising two different materials and capable of being initially rigid, while allowing differential thermal expansions after installation
US4036461A (en) * 1974-03-19 1977-07-19 Breda Termomeccanica S.P.A. Supporting grid for pipes
DE2706049A1 (de) * 1976-04-29 1977-11-10 Phillips Petroleum Co Vorrichtung zum lagern einer vielzahl von roehren in einem waermeaustauscher
US4128221A (en) * 1975-10-17 1978-12-05 Breda Termomeccanica S.P.A. Construction of a supporting grid for pipes
US4136736A (en) * 1976-04-29 1979-01-30 Phillips Petroleum Company Baffle
US4213499A (en) * 1976-12-21 1980-07-22 Breda Termomeccanica S.P.A. Supporting grate for tube plates and relative assembling in a steam generator or the like
US4429739A (en) 1980-08-29 1984-02-07 Phillips Petroleum Company Heat exchanger
US4718479A (en) * 1985-09-06 1988-01-12 Westinghouse Electric Corp. Antivibration bar installation apparatus
US4784220A (en) * 1986-09-19 1988-11-15 Man Gutrhoffnungshutte GmbH Pipe spacing grate rod spacing holder for heat exchangers
US4787440A (en) * 1981-12-02 1988-11-29 Phillips Petroleum Company Spiral flow in a shell and tube heat exchanger
US4828021A (en) * 1976-04-29 1989-05-09 Phillips Petroleum Company Heat exchanger baffle
CN103217051A (zh) * 2012-01-24 2013-07-24 阿尔斯通技术有限公司 用于管式交换器的交换管支承件和固定组件
WO2015091445A1 (en) * 2013-12-18 2015-06-25 Casale Sa Tube heat exchange unit for internals of heat exchangers or reactors

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4127165A (en) * 1976-07-06 1978-11-28 Phillips Petroleum Company Angular rod baffle
DE3540229A1 (de) * 1985-11-13 1987-05-14 MAN Gutehoffnungshütte GmbH, 4200 Oberhausen Rohrabstandsgitter zum fuehren der rohre von beispielsweise dampferzeugern
CN107701818B (zh) * 2017-09-27 2020-02-07 上海贝思特管业有限公司 一种高强高韧mpvc管

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2198529A (en) * 1938-12-09 1940-04-23 David E Fields Heat exchanger
US2884911A (en) * 1956-01-23 1959-05-05 Foster Wheeler Corp Tube support means
US3399719A (en) * 1964-12-23 1968-09-03 Atomic Energy Authority Uk Locating structure
US3420297A (en) * 1967-04-25 1969-01-07 Combustion Eng Heat exchanger tube support and spacing structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3421199A (en) * 1966-09-30 1969-01-14 Gen Electric Apparatus and method for manufacturing tube assemblies for heat exchange devices

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2198529A (en) * 1938-12-09 1940-04-23 David E Fields Heat exchanger
US2884911A (en) * 1956-01-23 1959-05-05 Foster Wheeler Corp Tube support means
US3399719A (en) * 1964-12-23 1968-09-03 Atomic Energy Authority Uk Locating structure
US3420297A (en) * 1967-04-25 1969-01-07 Combustion Eng Heat exchanger tube support and spacing structure

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036461A (en) * 1974-03-19 1977-07-19 Breda Termomeccanica S.P.A. Supporting grid for pipes
US3967677A (en) * 1975-05-28 1976-07-06 Mobil Oil Corporation Heat exchanger baffles
US4021204A (en) * 1975-06-09 1977-05-03 Breda Termomeccanica S.P.A. Method of manufacturing a grill-type support comprising two different materials and capable of being initially rigid, while allowing differential thermal expansions after installation
US4128221A (en) * 1975-10-17 1978-12-05 Breda Termomeccanica S.P.A. Construction of a supporting grid for pipes
DE2706049A1 (de) * 1976-04-29 1977-11-10 Phillips Petroleum Co Vorrichtung zum lagern einer vielzahl von roehren in einem waermeaustauscher
US4136736A (en) * 1976-04-29 1979-01-30 Phillips Petroleum Company Baffle
US4828021A (en) * 1976-04-29 1989-05-09 Phillips Petroleum Company Heat exchanger baffle
US4213499A (en) * 1976-12-21 1980-07-22 Breda Termomeccanica S.P.A. Supporting grate for tube plates and relative assembling in a steam generator or the like
US4429739A (en) 1980-08-29 1984-02-07 Phillips Petroleum Company Heat exchanger
US4787440A (en) * 1981-12-02 1988-11-29 Phillips Petroleum Company Spiral flow in a shell and tube heat exchanger
US4718479A (en) * 1985-09-06 1988-01-12 Westinghouse Electric Corp. Antivibration bar installation apparatus
US4784220A (en) * 1986-09-19 1988-11-15 Man Gutrhoffnungshutte GmbH Pipe spacing grate rod spacing holder for heat exchangers
CN103217051A (zh) * 2012-01-24 2013-07-24 阿尔斯通技术有限公司 用于管式交换器的交换管支承件和固定组件
US20130186594A1 (en) * 2012-01-24 2013-07-25 Alstom Technology Ltd. Exchange Tube Support and Securing Assembly for Tube Exchanger
CN103217051B (zh) * 2012-01-24 2015-05-20 阿尔斯通技术有限公司 用于管式交换器的交换管支承件和固定组件
WO2015091445A1 (en) * 2013-12-18 2015-06-25 Casale Sa Tube heat exchange unit for internals of heat exchangers or reactors
US10655921B2 (en) 2013-12-18 2020-05-19 Casale Sa Tube heat exchange unit for internals of heat exchangers reactors

Also Published As

Publication number Publication date
FR2211615A1 (xx) 1974-07-19
IT1000957B (it) 1976-04-10
DE2262621A1 (de) 1974-07-11
GB1439690A (en) 1976-06-16
FR2211615B3 (xx) 1976-10-15
SE388928B (sv) 1976-10-18
DE2262621B2 (de) 1981-07-02
DE2262621C3 (de) 1982-11-11
JPS49101701A (xx) 1974-09-26

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