US3644976A - Method for constructing superheater and/or reheater modules - Google Patents

Method for constructing superheater and/or reheater modules Download PDF

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Publication number
US3644976A
US3644976A US30370A US3644976DA US3644976A US 3644976 A US3644976 A US 3644976A US 30370 A US30370 A US 30370A US 3644976D A US3644976D A US 3644976DA US 3644976 A US3644976 A US 3644976A
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US
United States
Prior art keywords
header
superheater
reheater
positioning
nipples
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
US30370A
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English (en)
Inventor
James C Roberts Jr
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.)
Combustion Engineering Inc
Original Assignee
Combustion Engineering Inc
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 Combustion Engineering Inc filed Critical Combustion Engineering Inc
Application granted granted Critical
Publication of US3644976A publication Critical patent/US3644976A/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
    • F22G—SUPERHEATING OF STEAM
    • F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
    • F22G7/14—Steam superheaters characterised by location, arrangement, or disposition in water-tube boilers, e.g. between banks of water tubes
    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • F22B37/202—Suspension and securing arrangements for contact heating surfaces
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49387—Boiler making
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49895—Associating parts by use of aligning means [e.g., use of a drift pin or a "fixture"]
    • Y10T29/49901—Sequentially associating parts on stationary aligning means
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49904—Assembling a subassembly, then assembling with a second subassembly

Definitions

  • ABSTRACT A method for shop assembly of superheater and/or reheater modules wherein a segment of a superheater or reheater header, as it is formed in the shop, is accurately positioned in a vertical orientation with respect to a fixed reference base.
  • a lifting and shipping frame is particularly positioned on the reference base with respect to the header segment.
  • Individual tube panels are placed in the frame and joined to the header until a complete module is built up.
  • the module may then be conveniently shipped in its frame to the erection site where it may be positioned and joined to similar modules to form the unitary superheater or reheater structure.
  • FIG-8 INVENTOR. JANE 5 CRUBEETS JR.
  • FIG. 1 is a side elevation of the assembly fixture for constructing superheater and/or reheater modules according to the method of this invention.
  • FIG. la is a side elevation of a superheater/reheater module assembled in the lifting and shipping frame according to the method of this invention.
  • FIG. 2 is a plan view of the structural frame and module support of FIG. I.
  • FIG. 3 is a side elevational view of the structure of FIG. 2.
  • FIG. 4 is a plan view of the mounting plate of FIG. 1.
  • FIG. 5 is a side elevational view of the mounting plate of FIG. 4.
  • FIG. 6 is a rear elevational view of the mounting plate of FIG. 4.
  • FIG. 7 is a side elevational view of the V-slide base of FIG. 1.
  • FIG. 8 is a plan view of the V-slide assembly of FIG. I.
  • FIG. 9 is a side elevational view of the V-slide assembly of FIG. 8.
  • the superheater or reheater header is fabricated in cylindrical segments of between 8 and 14 feet in length.
  • each header segment is accurately positioned in a vertical orientation relative to a fixed reference base.
  • a lifting and shipping frame is particularly positioned on the fixed reference base relative to the header segment.
  • Tube panels, which are preassembled with the appropriate sealing means to form the seal ing wall of the boiler casing, are then placed one at a time in the shipping frame and joined to the header (and to each other). If two headers are necessary, the header segments are accurately positioned relative to one another and then the tube panels are joined thereto.
  • the tube panels will be accurately positioned to form desired superheater or reheater modules. Additionally, because the module is built up in a lifting and shipping frame, handling for shipping and erection at the site of the steam generating facility is readily and efficiently accomplished. As a result, there is a considerable cost savings due to the fact that the large number of tube-to-header welds are accomplished in the shop under standard, supervised conditions.
  • An assembly fixture 12 for assembling the superheater or reheater modules or elements 10 comprises a structural frame tower 18 mounted on the fixed reference base 16(FIG. 2). In relation to the tower 18 there is positioned a bed plate 20 and bed rails 22 on the fixed reference base 16 for the support of module 10 during assembly.
  • the structural frame tower 18 has mounted thereon longitudinally oriented machined surfaces 24 accurately positioned with respect to the fixed reference base 16.
  • the tower 18 may have additional machined surfaces 24 mounted on the side opposite from machined surfaces 24 in order to accomplish simultaneous construction of several modules at one time.
  • a mounting plate assembly 26 is particularly supported by the structural frame tower 18 so as to maintain an accurate relationship with the reference base 16.
  • the mounting plate assembly 26 comprises a mounting plate 28 which has accurately machined surfaces 30 positioned thereon so as to mate with the machined surfaces 24 to provide the desired accurate support therebetween.
  • the plate 28 At the top portion of the plate 28 are mounted rollers 32 which serve to support the mounting plate assembly 26 and permit transverse adjustment thereof along the machined surfaces 24.
  • the plate 28 has horizontal guides 34 which assist in the support and guiding of the mounting plate assembly 26.
  • the horizontal guides 34 have clamp means 36 so as to secure the position of the mounting plate assembly 26 with reference to the structural frame tower I8 and the shipping frame 14 when proper transverse positioning is accomplished.
  • the plate 28 Extending fonn the plate 28 are V-slide base supports 38 which have particular shaped notches 40 in the upper portions thereof for the purpose of accurately supporting the V-slide base 42.
  • the V-slide base 42 (best shown in FIG. 7) is comprised of a structural base 44 upon which are mounted guide rollers 46 which engage the notches 40 of the V-slide base supports 38 of the mounting plate assembly 26.
  • the base 44 has an upper extension 48 which in turn has a series of holes 50 to permit lifting and positioning of the V-slide base 42.
  • the structural base 44 has a lower extension 52 which supports a longitudinal positioning jack 54 and a header support means
  • the structural base 44 has an integral slide track 58 upon which V-slide assemblies 60 may be positioned.
  • the V-slide assembly 60 is comprised of a baseplate 62 having a standard 64 extending outwardly therefrom supported by web 66.
  • the standard 64 has guide bearings 68 mounted thereon.
  • the baseplate 62 of the V-slide assembly 60 has guides 70 formed by blocks 72 affixed to the base plate 62. These guides 70 ride on the slide track 58 so as to be adjustably positionable thereon.
  • Clamp means 74 serve to secure the position of the V-slide assembly 60 relative to the V-slide base 42.
  • the baseplate 62 additionally has bosses 76 through which a locking handle 78 extends. The locking handle 78 passes through an end connection 80 of a header retention cable 82 for the purpose to be explained hereinbelow.
  • a header locating plate 84 is positioned on the standard 64 and has tracks 86 which are engaged with guide bearings 68 of the V-slide assembly 60 so as to permit relative movement therebetween.
  • the header locating plate 84 has a V-notch 88 in the outwardly extending end (FIG. 8 shows two half views of the header locating plate 84, the first header locating plate 84 with notch 88 for the purpose of supporting large headers and the second header locating plate 84 with notch 88' for smaller headers) and a ram reaction plate 90 mounted centrally thereon. As seen in FIG.
  • an hydraulic ram 92 actuated by an hydraulic actuator 94 is positioned between the ram reaction plate 90 and the baseplate 62 of the V-slide assembly 60 to control the position of the header locating plate 84.
  • Blocks 96 (FIG. 8) are inserted between header locating plate 84 and the baseplate 62 to maintain their relative positions.
  • the assembly fixture 12 may be utilized to assembly superheater or reheater elements or modules according to the aforementioned. novel method in the following manner.
  • a segment of the superheater or reheater header 98 having the tube nipples 100 extending therefrom is positioned on the header locating plates 84 of the V-slide assemblies 60, the V-slide assemblies in turn being positioned on the V-slide base 42 so as to support the ends of the header 98 and clamped in the supporting position by clamps 74.
  • the header 98 is retained against the header locating plates 84 by the header retention cables 82 which are locked by the locking handles 78.
  • the end of the header 98 is supported by the header support means 56 and longitudinal positioning jack 54.
  • the V-slide base 42 is lifted by means (not shown) engaging the lifting holes 50 in the upper extension 48 lifting and positioning the guide rollers 44 into the notches 40 of the mounting plate assembly 26 to accomplish the correct relative positioning therebetween.
  • the mounting plate 26 is accurately positioned on the machined surfaces 24 of the structural frame tower l8 and clamped in position so that the header 98 is mounted in a vertical orientation and a fixed position relative to the structural frame tower 18.
  • the longitudinal positioning jack 56 may then be utilized to position the header 98 with respect to its height above the fixed reference base 16.
  • a lifting and shipping frame 14 is particularly positioned on the bed rails 22 so as to permit tube panels 102 for the superheater or reheater module 10 to be accurately positioned relative to the header 98 to build up the module 10. If two headers are associated with the superheater or reheater arrangement, the second header segment is accurately vertically positioned on the assembly 12 relative to the reference base 16 and the first header segment, in the same manner in which the first header segment is positioned. The tube panels can then be readily joined to each header segment to form the desired superheater or reheater configuration.
  • the high crown end bars 104 are located thereon.
  • the first tube panel 102 is then positioned in the shipping frame and welded to the corresponding nipple on the header 98.
  • the welding is accomplished by clamping the tube panel 102 to the respective tube nipples, tack welding the tubes and tube nipples removing the clamps and completing the welding.
  • the next tube panel is positioned and the high crown support bar 106 thereof is welded to the seal band 108 of the preceding tube panel.
  • the high crown support bars 106 are then welded to the high crown end bar 104 and the procedure is repeated until a complete module 10 is built up.
  • the high crown end bar, high crown support bar, and the seal bands serve to form the sealing wall of the boiler casing.
  • the shipping frame 14 may be completed and the entire unit positioned for shipping by the manipulation of th lifting and shipping frame 14.
  • a method for shop assembly of superheater or reheater modules comprising: accurately positioning a segment of the superheater or reheater header having integral nipples thereon in a vertical orientation with respect to a fixed reference, positioning a lifting and shipping frame means on said fixed reference relative to said header, positioning a first tube panel in said frame means adjacent said header for joining thereto, joining said first tube panel to said nipples on said header, positioning and joining additional tube panels with respect to said header until the superheater or reheater module is built up, and completing the shipping frame.
  • welding of said tube panel to said header comprises the steps clamping the tubes of said tube panel to said header nipples, tack welding said tubes to said nipples, removing said clamps, and finish welding said tubes to said nipples.
  • a method for shop assembly of superheater modules comprising: accurately positioning a segment of a first superheater or reheater header having integral nipples thereon in a vertical orientation with respect to a fixed reference, accurately positioning a segment of a second superheater or reheater header having integral nipples thereon in a vertical orientation with respect to said fixed reference and said first header segment, positioning a lifting and shipping frame means on said fixed reference relative to said headers, positioning a first tube panel in said frame means adjacent said integral nipples of said headers, welding said first tube panel to said nipples on said headers, positioning and welding additional tube panels with respect to said headers until the superheater or reheater element is built up, and completing the shipping frame.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Lining And Supports For Tunnels (AREA)
US30370A 1970-04-21 1970-04-21 Method for constructing superheater and/or reheater modules Expired - Lifetime US3644976A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3037070A 1970-04-21 1970-04-21

Publications (1)

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US3644976A true US3644976A (en) 1972-02-29

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US30370A Expired - Lifetime US3644976A (en) 1970-04-21 1970-04-21 Method for constructing superheater and/or reheater modules

Country Status (7)

Country Link
US (1) US3644976A (OSRAM)
CA (1) CA942483A (OSRAM)
DE (1) DE2107572A1 (OSRAM)
ES (1) ES389781A1 (OSRAM)
FR (1) FR2089921A5 (OSRAM)
GB (1) GB1311833A (OSRAM)
NL (1) NL7105295A (OSRAM)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4026419A (en) * 1975-10-29 1977-05-31 The Babcock & Wilcox Company Industrial technique
US4102652A (en) * 1975-10-01 1978-07-25 Deggendorfer Werft Und Eisenbau Gmbh Modular construction for a large catalytic reaction apparatus
US4194671A (en) * 1977-04-22 1980-03-25 Ecolaire Incorporated Method for constructing a steam condenser
US4255841A (en) * 1979-08-20 1981-03-17 Ecolaire Incorporated Condenser construction with delayed tube bundles
US4675963A (en) * 1983-10-19 1987-06-30 Stein Industrie Method of assembly of a steam separator super-heater

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107720580B (zh) * 2017-10-19 2023-09-01 中国电建集团福建工程有限公司 一种锅炉施工水冷壁快速施工吊装装置及其方法
CN113500320B (zh) * 2021-07-29 2022-04-19 中车长春轨道客车股份有限公司 一种波纹板插接式箱型结构的底架前端模块组焊工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775810A (en) * 1952-05-29 1957-01-01 Babcock & Wilcox Co Boiler erection apparatus
US3216749A (en) * 1960-04-19 1965-11-09 Babcock & Wilcox Ltd Pressure vessel having groups of welding nipples alternately arranged
US3274745A (en) * 1962-07-02 1966-09-27 Foster Wheeler Corp Process for constructing a petroleum refinery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2775810A (en) * 1952-05-29 1957-01-01 Babcock & Wilcox Co Boiler erection apparatus
US3216749A (en) * 1960-04-19 1965-11-09 Babcock & Wilcox Ltd Pressure vessel having groups of welding nipples alternately arranged
US3274745A (en) * 1962-07-02 1966-09-27 Foster Wheeler Corp Process for constructing a petroleum refinery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102652A (en) * 1975-10-01 1978-07-25 Deggendorfer Werft Und Eisenbau Gmbh Modular construction for a large catalytic reaction apparatus
US4026419A (en) * 1975-10-29 1977-05-31 The Babcock & Wilcox Company Industrial technique
US4194671A (en) * 1977-04-22 1980-03-25 Ecolaire Incorporated Method for constructing a steam condenser
US4255841A (en) * 1979-08-20 1981-03-17 Ecolaire Incorporated Condenser construction with delayed tube bundles
US4675963A (en) * 1983-10-19 1987-06-30 Stein Industrie Method of assembly of a steam separator super-heater

Also Published As

Publication number Publication date
NL7105295A (OSRAM) 1971-10-25
GB1311833A (en) 1973-03-28
CA942483A (en) 1974-02-26
DE2107572A1 (de) 1971-11-04
ES389781A1 (es) 1973-06-01
FR2089921A5 (OSRAM) 1972-01-07

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