WO2012063661A1 - Procédé de fabrication d'un générateur de vapeur - Google Patents

Procédé de fabrication d'un générateur de vapeur Download PDF

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Publication number
WO2012063661A1
WO2012063661A1 PCT/JP2011/074997 JP2011074997W WO2012063661A1 WO 2012063661 A1 WO2012063661 A1 WO 2012063661A1 JP 2011074997 W JP2011074997 W JP 2011074997W WO 2012063661 A1 WO2012063661 A1 WO 2012063661A1
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WO
WIPO (PCT)
Prior art keywords
heat transfer
transfer tube
steam generator
bracing
interval
Prior art date
Application number
PCT/JP2011/074997
Other languages
English (en)
Japanese (ja)
Inventor
康輔 北村
宣隆 中島
崇 香川
Original Assignee
三菱重工業株式会社
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 三菱重工業株式会社 filed Critical 三菱重工業株式会社
Publication of WO2012063661A1 publication Critical patent/WO2012063661A1/fr

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    • 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
    • F22B1/023—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes, for nuclear reactors as far as they are not classified, according to a specified heating fluid, in another group
    • F22B1/025—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers with heating tubes, for nuclear reactors as far as they are not classified, according to a specified heating fluid, in another group with vertical U shaped tubes carried on a horizontal tube sheet
    • 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
    • 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
    • F28F9/0132—Auxiliary supports for elements for tubes or tube-assemblies formed by slats, tie-rods, articulated or expandable rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/30—Safety or protection arrangements; Arrangements for preventing malfunction for preventing vibrations
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D1/00—Details of nuclear power plant
    • G21D1/006—Details of nuclear power plant primary side of steam generators

Definitions

  • the present invention relates to a method for manufacturing a steam generator, for example, in which a bracing member is inserted at a predetermined position between heat transfer tubes.
  • the steam generator is a series of U-shaped heat transfer tubes.
  • a bracing member is used to prevent fluid excitation vibration in a U-shaped arc portion when the gas-liquid two-phase fluid flows outside the heat transfer tube.
  • the bracing member is substantially V-shaped inserted between the heat transfer tubes in the arc portion.
  • a member in which a substantially V-shaped anti-vibration member is further inserted inside a substantially V-shaped anti-vibration member is known (for example, see Patent Document 1).
  • Such a bracing member is inserted from the substantially V-shaped bent portion side between the heat transfer tubes laminated so that the arc portion is horizontal when the steam generator is manufactured, and the outermost peripheral heat transfer tube Both ends of the substantially V-shape project outside the arc portion. Thereafter, each end of the bracing member is connected.
  • a method in which a spacer is interposed between the anti-vibration members and fastened with bolts for example, refer to Patent Document 2
  • the slot is formed in the long portion.
  • a method of inserting a stop member, closing a space formed by a slot with a cover, and fastening the cover to a long portion with a bolt for example, see Patent Document 3 is known.
  • the vibration preventing member itself may vibrate. If the distance between adjacent members is smaller than a predetermined distance, the heat transfer tube may be damaged. For this reason, it is necessary to connect the adjacent bracing members at a predetermined interval.
  • the bracing members adjacent to each other by the spacer or the slot of the elongated portion are set at a predetermined interval. If the bolts are loosened, the spacers and the long part may fall off and fall, damaging the heat transfer tubes.
  • This invention solves the subject mentioned above, and while connecting the adjacent bracing member with a predetermined space
  • a method of manufacturing a steam generator according to the present invention is a method of manufacturing a steam generator in which an anti-vibration member is disposed between heat transfer tubes.
  • a spacing holding jig is disposed between the respective bracing members to hold the spacing between the bracing members, and the bracing members that are held by the spacing holding jig are mutually connected.
  • adjacent bracing members are connected by welding holding members, and the interval between the bracing members is set by a spacing holding jig that is attached during welding and removed after welding. Retained. For this reason, there is no gap holding jig when the steam generator is in operation. As a result, it is possible to connect adjacent anti-vibration members at a predetermined interval and prevent a member having the predetermined interval from falling into the steam generator.
  • the distance between the neighboring bracing members is measured, and the measured value
  • the distance holding jig having a size according to the above is used.
  • the spacing between the heat transfer tube and the bracing member is designed in consideration of the design tolerance by using the spacing holding jig according to the spacing between adjacent bracing members. Adjacent bracing members can be connected at predetermined intervals as required.
  • the heat transfer tube has a circular arc portion formed in a U shape, and the heat transfer tube in which a large diameter is arranged from the center toward the outside.
  • the arc portion is formed into a hemispherical shape by changing the diameter of the outermost heat transfer tube while overlapping the heat transfer tube layers, and the bracing member is inserted between the heat transfer tube layers.
  • an end projecting outside the arc portion forms a row provided along the hemispherical shape along the direction in which the heat transfer tube layers are stacked, and a plurality of the rows are provided following the hemispherical shape.
  • Each of the steps is performed from the center of the hemisphere to the outside in one row of the end portions of the bracing member.
  • this steam generator manufacturing method when welding is performed from the center of the hemisphere in the row of end portions of the bracing member, the interval between the bracing members at the center is first determined. It becomes easy to keep the balance of the spacing of the bracing members in the stacked direction. As a result, a highly accurate steam generator can be efficiently manufactured.
  • the heat transfer tube has a circular arc portion formed in a U shape, and the heat transfer tube in which a large diameter is arranged from the center toward the outside.
  • the arc portion is formed into a hemispherical shape by changing the diameter of the outermost heat transfer tube while overlapping the heat transfer tube layers, and the bracing member is inserted between the heat transfer tube layers.
  • an end projecting outside the arc portion forms a row provided along the hemispherical shape along the direction in which the heat transfer tube layers are stacked, and a plurality of the rows are provided following the hemispherical shape.
  • Each step is performed from the hemispherical outer side to the center in each row of the end portions of the anti-vibration member.
  • the hemispherical outer side is narrow due to the configuration of the steam generator. Is difficult. Furthermore, the interval adjustment and welding operations are difficult because the pre-adjustment width of the subsequent row is eliminated as much as the previous row is adjusted. For this reason, when welding is performed from the hemispherical outer row to the middle row, a reduction in work efficiency is suppressed. As a result, the steam generator can be efficiently manufactured.
  • the gap between the heat transfer tube and the bracing member is larger than a predetermined interval.
  • the holding member that connects the stop members is reduced and adjusted by contraction heating.
  • the interval between the respective bracing members can be corrected to a predetermined interval.
  • FIG. 1 is a schematic side sectional view of a steam generator according to an embodiment of the present invention.
  • FIG. 2 is a schematic plan view of the heat transfer tube group. 3 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 4 is a schematic perspective view of the heat transfer tube group.
  • FIG. 5 is a schematic diagram showing a method for manufacturing a steam generator according to an embodiment of the present invention.
  • FIG. 6A is a process diagram illustrating a procedure for assembling a heat transfer tube in the method of manufacturing a steam generator according to the embodiment of the present invention.
  • FIG. 6B is a process diagram showing the procedure for assembling the heat transfer tube in the method for manufacturing the steam generator according to the embodiment of the present invention.
  • FIG. 6A is a process diagram illustrating a procedure for assembling a heat transfer tube in the method of manufacturing a steam generator according to the embodiment of the present invention.
  • FIG. 6B is a process diagram showing the procedure for assembling the heat transfer tube in the method
  • FIG. 6-3 is a process diagram showing a heat transfer tube assembling procedure in the steam generator manufacturing method according to the embodiment of the present invention.
  • FIG. 6-4 is a process diagram illustrating a procedure for assembling the heat transfer tube in the method for manufacturing the steam generator according to the embodiment of the present invention.
  • FIG. 6-5 is a process diagram showing the procedure for assembling the heat transfer tubes in the method for manufacturing the steam generator according to the embodiment of the present invention.
  • FIG. 7 is a cross-sectional view taken along line BB in FIG. 6-3.
  • FIG. 8-1 is a schematic diagram illustrating an example of a spacing unit used in the method for manufacturing a steam generator according to the embodiment of the present invention.
  • FIG. 8-2 is a schematic diagram illustrating an example of a spacing unit used in the method for manufacturing a steam generator according to the embodiment of the present invention.
  • FIG. 8-3 is a schematic diagram illustrating an example of a spacing unit used in the method for manufacturing a steam generator according to the embodiment of the present invention.
  • FIG. 9 is a schematic view showing the order in which the holding members are welded in the method of manufacturing the steam generator according to the embodiment of the present invention.
  • FIG. 1 is a schematic side sectional view of a steam generator according to the present embodiment.
  • the steam generator 1 is used, for example, in a pressurized water reactor (PWR: Pressurized Water Reactor).
  • the pressurized water reactor uses light water as a reactor coolant and neutron moderator.
  • the pressurized water reactor sends primary cooling water to the steam generator 1 as high-temperature and high-pressure water that does not boil light water over the entire core.
  • the heat of the primary cooling water at high temperature and high pressure is transmitted to the secondary cooling water, and water vapor is generated in the secondary cooling water. Then, the steam generator is rotated by this steam to generate electricity.
  • the steam generator 1 has a hollow cylindrical shape that extends in the vertical direction and is hermetically sealed, and has a body portion 2 in which the lower half is slightly smaller in diameter than the upper half.
  • the trunk portion 2 is provided with a tube group outer cylinder 3 having a cylindrical shape disposed at a predetermined distance from the inner wall surface of the trunk portion 2 in the lower half portion thereof.
  • the lower end portion of the tube group outer tube 3 extends to the vicinity of the tube plate 4 disposed below in the lower half of the body portion 2.
  • a heat transfer tube group 51 is provided in the tube group outer tube 3.
  • the heat transfer tube group 51 includes a plurality of heat transfer tubes 5 having an inverted U shape.
  • Each heat transfer tube 5 is arranged with the U-shaped arc portion facing upward, the lower end portion thereof is supported by the tube plate 4, and the intermediate portion thereof via the plurality of tube support plates 6. It is supported by.
  • a number of through holes are formed in the tube support plate 6, and the heat transfer tubes 5 are passed through the through holes.
  • the body 2 is provided with a water chamber 7 at its lower end.
  • the water chamber 7 is divided into an entrance chamber 71 and an exit chamber 72 by a partition wall 8.
  • the entrance chamber 71 communicates with one end of each heat transfer tube 5, and the exit chamber 72 communicates with the other end of each heat transfer tube 5.
  • the entrance chamber 71 is formed with an inlet nozzle 711 leading to the outside of the body portion 2, and the exit chamber 72 is formed with an exit nozzle 721 leading to the outside of the body portion 2.
  • the inlet nozzle 711 is connected to a cooling water pipe (not shown) through which primary cooling water is sent from the pressurized water reactor, and the outlet nozzle 721 passes the primary cooling water after heat exchange to the pressurized water reactor.
  • the cooling water piping (not shown) to send is connected.
  • an air-water separator 9 that separates feed water into steam and hot water, and a moisture separator that removes the moisture of the separated steam and makes it close to dry steam. 10 is provided.
  • a water supply pipe 11 for supplying secondary cooling water from the outside into the body 2 is inserted.
  • drum 2 has the vapor
  • the body 2 has a tube plate in the lower half of which the secondary cooling water supplied from the water supply pipe 11 into the body 2 flows down between the body 2 and the tube group outer tube 3.
  • a water supply path 13 that is folded back at 4 and raised along the heat transfer tube group 51 is formed.
  • the steam outlet 12 is connected to a cooling water pipe (not shown) for sending steam to the turbine, and the water supply pipe 11 has two steams used in the turbine cooled by a condenser (not shown).
  • a cooling water pipe (not shown) for supplying the next cooling water is connected.
  • the primary cooling water heated in the pressurized water reactor is sent to the entrance chamber 71, circulates through the numerous heat transfer tubes 5, and reaches the exit chamber 72.
  • the secondary cooling water cooled by the condenser is sent to the water supply pipe 11 and rises along the heat transfer pipe group 51 through the water supply path 13 in the trunk portion 2. At this time, heat exchange is performed between the high-pressure and high-temperature primary cooling water and the secondary cooling water in the trunk portion 2. Then, the cooled primary cooling water is returned from the outlet chamber 72 to the pressurized water reactor.
  • the secondary cooling water subjected to heat exchange with the high-pressure and high-temperature primary cooling water rises in the body portion 2 and is separated into steam and hot water by the steam separator 9.
  • the separated steam is sent to the turbine after moisture is removed by the moisture separator 10.
  • FIG. 2 is a schematic plan view of the heat transfer tube group
  • FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2
  • FIG. 4 is a schematic perspective view of the heat transfer tube group.
  • an inverted U-shaped arc portion of the heat transfer tube 5 is disposed at the upper end portion of the heat transfer tube group 51.
  • the heat transfer tubes 5 are arranged in such a manner that the arc portions having large diameters are arranged from the center toward the outside, and the arranged outermost outer circumferences are stacked side by side as shown in FIG.
  • the upper end portion of the heat transfer tube group 51 is formed in a hemispherical shape by changing the diameter of the heat transfer tube.
  • the bracing member 14 is inserted between the stacked rows of heat transfer tubes 5.
  • the bracing member 14 has a rectangular cross section, is formed by being bent into a substantially V shape, and a bent portion is disposed at a portion (predetermined position) having the same diameter in the row of the stacked heat transfer tubes 5. Then, both ends of the bracing member 14 protrude from the outer side of the arc portion of the heat transfer tube 5 having the largest diameter.
  • the ends of the bracing members 14 are arranged in a line along the hemispherical arc of the heat transfer tube group 51.
  • a small V-shaped member is disposed inside a large substantially V-shaped member to form a pair, and for example, three pairs are disposed in a semicircular portion of the heat transfer tube 5.
  • the bracing member 14 is formed of a metal material (for example, stainless steel 405 or 410) that is preferable for suppressing vibration of the heat transfer tube 5.
  • the joining member 15 is provided in the both ends which protrude outside the circular arc part of the heat exchanger tube 5. As shown in FIG.
  • the joining member 15 is formed of a metal material (for example, Inconel 690) which is the same metal material as the holding member 16 described later and has excellent corrosion resistance in a high temperature atmosphere.
  • the holding member 16 is welded to the joining member 15 provided on the bracing member 14.
  • the holding member 16 is formed of a metal material (for example, Inconel 690) excellent in corrosion resistance in a high temperature atmosphere, and is a rod-like member attached along the hemispherical outer periphery of the heat transfer tube group 51, and the outermost heat transfer tube. It is attached to the heat transfer tube group 51 by being welded to both ends of a substantially U-shaped attachment portion 17 inserted between the heat transfer tube 5 and the heat transfer tube 5 inside thereof.
  • the bracing member 14 is disposed in the heat transfer tube group 51 in a form inserted at a predetermined position between the heat transfer tubes 5.
  • FIG. 5 is a schematic diagram showing a method for manufacturing the steam generator according to the present embodiment
  • FIGS. 6-1 to 6-5 are methods for manufacturing the steam generator according to the present embodiment.
  • FIG. 7 is a process diagram showing a procedure for assembling a heat tube
  • FIG. 7 is a front view showing a spacing holding jig used in the method of manufacturing a steam generator according to the present embodiment, and is a cross-sectional view taken along line BB in FIG.
  • FIGS. 8A to 8C are schematic diagrams illustrating an example of the interval holding unit used in the method for manufacturing the steam generator according to the present embodiment
  • FIG. 9 illustrates the embodiment. It is the manufacturing method of the steam generator which concerns on this, and is the schematic which shows the order which welds a holding member.
  • the heat transfer tube 5 includes an upper half portion of the body portion 2, an air / water separator 9, a moisture separator 10, and a water supply tube 11 provided in the upper half portion. It is attached to the lower half part of the body part 2 before. As shown in FIG. 5, the tube group outer cylinder 3, the tube plate 4, and each tube support plate 6 are attached to the lower half of the body portion 2 in a state of being horizontally placed on the gantry 20. Thereafter, the heat transfer tube 5 is penetrated through the tube support plates 6 at both ends from the upper side in the lower half portion of the trunk portion 2 (right side for horizontal placement in FIG. 5), and is penetrated and fixed to the tube plate 4. It is arranged in a hemispherical shape on the upper side in the lower half of the part 2.
  • the heat transfer tube 5 penetrating the tube support plate 6 and the tube plate 4 has a single layer in which a plurality of large tubes are arranged horizontally from the center to the outside where the diameter of the arcuate portion formed in the U shape is the smallest.
  • the heat tube layer 5A (see FIG. 3) is used as a reference. And while this heat transfer tube layer 5A is laminated
  • bracing member 14 is inserted between the heat transfer tube layers 5A, and the end protruding outside the arc portion of the heat transfer tube 5 follows the hemispherical shape along the direction in which the heat transfer tube layers 5A are laminated.
  • a row is provided side by side, and a plurality of the rows are provided following the hemispherical shape (see FIG. 9).
  • Each heat transfer tube layer 5A has a lifter on the upper side (the right side in FIG. 5) of the lower half of the body portion 2 so that the heat transfer tube layers 5A can be taken out in order from the top with the layers stacked in reverse order. 21 is put on. A lifter 22 is provided between the lifter 21 and the lower half of the body 2 for a worker who performs an operation of penetrating the heat transfer tube 5 through the tube support plate 6 and the tube plate 4.
  • the end of the bracing member 14 inserted at a predetermined position between the heat transfer tube layers 5A and the outermost heat transfer tube 5 having the largest diameter are temporarily fixed such as a binding band.
  • the baffle member 14 is temporarily fixed to the heat transfer tube 5 (heat transfer tube group 51) by binding with the tool 18.
  • the horizontally laminated heat transfer tube layers 5A are vertically raised as shown in FIG. 6-2.
  • the heat transfer tube group 51 is rotated 90 degrees around the center line S shown in FIG.
  • the end of the bracing member 14 is fixed to the heat transfer tube 5 by the fixing jig 19 instead of the temporary fastener 18.
  • the fixing jig 19 described in Japanese Patent Application Laid-Open No. 2009-168398 may be used.
  • the holding member 16 is welded to the joining member 15 of the other end part of the bracing member 14.
  • FIG. The holding member 16 is welded so as to connect the row of end portions of the bracing member 14.
  • a gap holding jig 25 is interposed between the other ends of the anti-vibration member 14 not fixed by the fixing jig 19, and the clamp is performed.
  • a predetermined interval between the heat transfer tube 5 and the anti-vibration member 14 is maintained by sandwiching the joining member 15 at the other end of the anti-vibration member 14 on both sides with the interval holding jig 25 interposed therebetween (not shown).
  • the holding member 16 is welded to the joining member 15 at the other end of the bracing member 14 that is not fixed by the fixing jig 19.
  • the fixing jig 19 is removed, and one end is similarly held by the joining member 15 while holding the predetermined interval between the heat transfer tube 5 and the anti-rest member 14 using the interval holding jig 25 and the clamp.
  • the member 16 is welded.
  • the holding members 16 are continuously welded in the same row of the end portions of the bracing members 14, the welded bracing members 14 are adjacent to the bracing members 14 as shown in FIG. 6-4.
  • the interval holding jig 25 is inserted between the anti-vibration members 14, the respective anti-vibration members 14 are brought close to the interval holding jig 25, and fixed with clamps.
  • the holding member 16 is welded to the joining member 15 of the unwelded bracing member 14 fixed by the clamp.
  • the attaching part 17 is inserted between the outermost periphery in the heat exchanger tube 5 (heat exchanger tube group 51), and its inner side, and this attaching part The both ends of 17 and the holding member 16 are welded.
  • the interval holding jig 25 is protruded from the interval holding portion 25 a so as to be hung on the edge of the adjacent holding member 14 and the interval holding portion 25 a holding the interval between the adjacent holding members 14. And an arcuate portion 25c at the insertion end for facilitating insertion between the anti-vibration members 14.
  • the interval Wa formed by the interval holding unit 25 a takes into consideration the plate thickness Wb of the anti-vibration member 14, the diameter Wc of the heat transfer tube 5, and the thickness Wd of the joining member 15.
  • the distance W between the heat pipe 5 and the bracing member 14 is set to meet the designed requirements.
  • the interval holding jig 25 has four types according to the arrangement of the bracing member 14 and the joining member 15 with respect to the heat transfer tube 5. Specifically, as shown in FIG. 8A, it is inserted between the bracing member 14 and between the bracing member 14 and the joining member 15 as shown in FIG. 8B, and the configuration in which the anti-vibration member 14 and the joining member 15 are disposed in the reverse direction in FIG. As shown in FIG. 3, there is a form inserted between the joining members 15. These interval holding jigs 25 may be used according to the arrangement of the bracing member 14 and the joining member 15 with respect to the heat transfer tube 5.
  • the spacing holding jig 25 is a design that is a difference between the maximum dimension and the minimum dimension of an allowable error with respect to the plate thickness Wb of the bracing member 14, the diameter Wc of the heat transfer tube 5, and the thickness Wd of the joining member 15.
  • the interval Wa of the interval holding portion 25a is different so that the interval W between the heat transfer tube 5 and the bracing member 14 becomes a designed requirement.
  • the spacing member 14 is brought close to the heat transfer tube 5 to measure the spacing between the damping member 14 and the spacing W between the heat transfer tube 5 and the damping member 14.
  • the interval holding jig 25 is selected so as to be a predetermined interval. In this manner, the interval is adjusted so as to be allowed for the entire row of end portions of the bracing member 14.
  • welding of the holding member 16 to the joining member 15 of the bracing member 14 includes each row of end portions of the bracing member 14 as one area (indicated by ⁇ in FIG. 9), and each The area is defined as a zone (indicated by ⁇ in FIG. 9) divided into a plurality of zones in the direction in which the heat transfer tube layers 5A are laminated, and the order is determined for each zone and each area.
  • Each area is divided into 12 areas because in FIG. 9 there are 12 rows at the end of the bracing member 14.
  • each zone has a hemispherical central portion of the heat transfer tube group 51 as one zone, and is divided into three zones toward both outer sides, for a total of four zones.
  • each zone starting from the hemispherical central zone ⁇ 1 of the heat transfer tube group 51, welding is performed in the order of zone ⁇ 2 ⁇ zone ⁇ 3 ⁇ zone ⁇ 4. In each zone, welding is performed every predetermined number (for example, 10) of the anti-vibration members 14 from the inside to the outside. As described above, when welding is performed from the center of the hemispherical shape of the heat transfer tube group 51 in the zone, the interval between the anti-vibration members 14 at the center is first determined. It becomes easy to maintain the balance of the interval between the members 14.
  • each area welding is performed from the hemispherical outer side of the heat transfer tube group 51 to the center.
  • the uppermost outer area ⁇ 1 ⁇ the inner area ⁇ 2 ⁇ the lower outermost area ⁇ 3 ⁇ the inner area ⁇ 4 ⁇ the inner area ⁇ 5.
  • Inside area ⁇ 6 Inside area ⁇ 2 Inside area ⁇ 7 ⁇ Inside area ⁇ 8 ⁇ Inside area ⁇ 9 ⁇ Inside (uppermost inside) area ⁇ 10 ⁇ Inside of area ⁇ 6
  • Welding is performed in the order of area ⁇ 11 ⁇ area ⁇ 12 on the inner side (lower innermost side).
  • the hemispherical outer area of the heat transfer tube group 51 is narrow and close to the tube group outer tube 3 as shown in FIG. Furthermore, the interval adjustment and the welding work are difficult because the pre-adjustment width of the subsequent area is lost as the previous area is adjusted. For this reason, when welding is performed from the hemispherical outer area of the heat transfer tube group 51 to the center area, a reduction in work efficiency is suppressed.
  • welding is performed by combining each zone and each area. That is, starting from the zone ⁇ 1, welding is performed in the order of the area ⁇ 1 to the area ⁇ 12 in the zone ⁇ 1, and this is sequentially welded up to the zone ⁇ 4. If it does in this way, the balance of the space
  • the steam generator manufacturing method according to the present embodiment is inserted between the heat transfer tubes 5 and adjacent to each other in the steam generator manufacturing method in which the bracing member 14 is disposed between the heat transfer tubes 5.
  • the spacing holding jig 25 is disposed between the respective bracing members 14 to hold the spacing between the respective bracing members 14 and the respective bracing members 14 held by the spacing holding jig 25.
  • adjacent bracing members 14 are connected by welding holding members 16, and the spacing between the respective bracing members 14 is a spacing hold that is attached during welding and removed after welding. It is held by the jig 25. For this reason, the interval holding jig 25 does not exist when the steam generator is in operation. As a result, it is possible to connect adjacent anti-vibration members 14 at a predetermined interval and prevent a member having the predetermined interval from falling into the steam generator.
  • the spacing holding jig 25 between the adjacent bracing members 14 is measured, An interval holding jig 25 having a dimension corresponding to the measured value is used.
  • the heat transfer tube 5 and the anti-vibration member 14 are considered in consideration of design tolerances.
  • Adjacent bracing members 14 can be connected at a predetermined interval so that the interval W becomes a designed requirement.
  • the heat transfer tube 5 has a circular arc portion formed in a U shape, and a large diameter is arranged from the center toward the outside.
  • the heat transfer tube layer 5A is formed, and the arc portion is formed in a hemispherical shape by changing the diameter of the outermost heat transfer tube while overlapping the heat transfer tube layer 5A, and the bracing member 14 is provided between the heat transfer tube layers 5A.
  • an end projecting outward from the arc portion along the direction in which the heat transfer tube layers 5A are stacked along the hemispherical shape is formed, and the row follows the hemispherical shape.
  • Each step is performed from the center of the hemisphere to the outside in one row at the end of the anti-vibration member 14.
  • this steam generator manufacturing method when welding is performed from the center of the hemispherical shape of the heat transfer tube group 51 in the end row of the bracing members 14, the interval between the bracing members 14 at the center is first determined. For this reason, it becomes easy to maintain the balance of the spacing of the bracing members 14 in the direction in which the heat transfer tube layers 5A are laminated. As a result, a highly accurate steam generator can be efficiently manufactured.
  • each of the steps is performed from the outer side of the hemisphere to the center in each row of the end portion of the anti-vibration member 14.
  • the hemispherical outer area is narrow and close to the tube group outer tube 3 as shown in FIG. Compared to the side, it is difficult to adjust the distance and perform welding. Furthermore, the interval adjustment and the welding work are difficult because the pre-adjustment width of the subsequent area is lost as the previous area is adjusted. For this reason, when welding is performed from the hemispherical outer area of the heat transfer tube group 51 to the center area, a reduction in work efficiency is suppressed. As a result, the steam generator can be efficiently manufactured.
  • each said The portion of the holding member 16 that connects the anti-vibration members 14 is reduced and adjusted by contraction heating.

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  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

La présente invention se rapporte à un procédé de fabrication d'un générateur de vapeur, des éléments qui empêchent les vibrations (14) étant positionnés entre des tuyaux de chauffage (5). Ledit procédé comprend : une étape pour positionner des gabarits d'écartement (25) entre des éléments adjacents qui empêchent les vibrations (14) de sorte à insérer les éléments qui empêchent les vibrations (14) entre les tuyaux de chauffage (5), ce qui permet de conserver l'écartement des éléments qui empêchent les vibrations (14) ; une étape pour souder un élément de support (16) aux éléments qui empêchent les vibrations (14) de telle sorte que les éléments qui empêchent les vibrations (14), dont l'écartement est conservé par les gabarits d'écartement (25), soient reliés les uns aux autres ; et une étape pour enlever les gabarits d'écartement (25) après que l'élément de support (16) a été soudé aux éléments qui empêchent les vibrations (14).
PCT/JP2011/074997 2010-11-09 2011-10-28 Procédé de fabrication d'un générateur de vapeur WO2012063661A1 (fr)

Applications Claiming Priority (2)

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JP2010251313A JP2012102934A (ja) 2010-11-09 2010-11-09 蒸気発生器の製造方法
JP2010-251313 2010-11-09

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WO2012063661A1 true WO2012063661A1 (fr) 2012-05-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2693149A1 (fr) * 2012-08-02 2014-02-05 Mitsubishi Heavy Industries, Ltd. Échangeur de chaleur, gabarit d'expansion d'entrefer d'un tube de transfert de chaleur et procédé de disposition d'élément de suppression de vibration

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014070821A (ja) * 2012-09-28 2014-04-21 Mitsubishi Heavy Ind Ltd 蒸気発生器及び蒸気発生器の組立方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009168398A (ja) * 2008-01-18 2009-07-30 Mitsubishi Heavy Ind Ltd 蒸気発生器の製造方法および固定治具
JP2009242823A (ja) * 2008-03-28 2009-10-22 Netsusan Heat Kk 誘導加熱装置
JP2009264279A (ja) * 2008-04-25 2009-11-12 Toyota Industries Corp 電動圧縮機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009168398A (ja) * 2008-01-18 2009-07-30 Mitsubishi Heavy Ind Ltd 蒸気発生器の製造方法および固定治具
JP2009242823A (ja) * 2008-03-28 2009-10-22 Netsusan Heat Kk 誘導加熱装置
JP2009264279A (ja) * 2008-04-25 2009-11-12 Toyota Industries Corp 電動圧縮機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2693149A1 (fr) * 2012-08-02 2014-02-05 Mitsubishi Heavy Industries, Ltd. Échangeur de chaleur, gabarit d'expansion d'entrefer d'un tube de transfert de chaleur et procédé de disposition d'élément de suppression de vibration

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