WO2014030719A1 - Dispositif de dilatation de tube, procédé de dilatation de tube de transfert de chaleur, procédé de réparation de tube de transfert de chaleur, procédé de fermeture de tube de transfert de chaleur, et bobine électromagnétique - Google Patents

Dispositif de dilatation de tube, procédé de dilatation de tube de transfert de chaleur, procédé de réparation de tube de transfert de chaleur, procédé de fermeture de tube de transfert de chaleur, et bobine électromagnétique Download PDF

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Publication number
WO2014030719A1
WO2014030719A1 PCT/JP2013/072466 JP2013072466W WO2014030719A1 WO 2014030719 A1 WO2014030719 A1 WO 2014030719A1 JP 2013072466 W JP2013072466 W JP 2013072466W WO 2014030719 A1 WO2014030719 A1 WO 2014030719A1
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WO
WIPO (PCT)
Prior art keywords
heat transfer
tube
transfer tube
electromagnetic coil
probe
Prior art date
Application number
PCT/JP2013/072466
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English (en)
Japanese (ja)
Inventor
慎吾 西田
英之 森田
和生 廣田
健吾 嶋村
亮一 川上
隆也 日下部
Original Assignee
三菱重工業株式会社
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Filing date
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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 WO2014030719A1 publication Critical patent/WO2014030719A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes

Definitions

  • the present invention relates to a tube expansion jig used for expanding a tube body such as a heat transfer tube provided in a steam generator, a method of expanding a heat transfer tube using the tube expansion jig, a repair method, a closing method, and an electromagnetic coil. is there.
  • a tube expansion method in which a heat transfer tube provided in a steam generator is expanded, and the heat transfer tube is fixed to a tube plate (for example, see Patent Document 1).
  • the heat transfer tube is expanded by applying a hydraulic pressure to the inside of the heat transfer tube using a tube expansion tool.
  • the heat transfer tubes provided in the steam generator are configured as a dense heat transfer tube group, it is difficult to expand the heat transfer tubes by accessing from outside the heat transfer tubes. For this reason, it is preferable to access from the inside of the heat transfer tube and expand the heat transfer tube.
  • the heat transfer tubes provided in the steam generator have severe requirements regarding welding processing such as residual stress, it is necessary to satisfy the strict requirements when welding the heat transfer tubes.
  • the tube diameter of the heat transfer tube provided in the steam generator is larger than that of a heat transfer tube used in a general heat exchanger, the force for expanding the tube is large.
  • the conventional tube expansion method expands the heat transfer tube by applying a liquid pressure to the inside of the heat transfer tube.
  • the stroke amount (expansion amount) that can be expanded by the hydraulic pressure is small. That is, since the conventional tube expansion tool expands the tube by hydraulic pressure, it is necessary to seal a part of the heat transfer tube, and the amount of tube expansion is small in order to ensure sealing performance.
  • work which seals a part of heat exchanger tube must be performed, and a pipe expansion operation becomes complicated.
  • the present invention simplifies the tube expansion work, and a tube expansion jig, a tube expansion method for the heat transfer tube, a heat transfer tube repair method, and a heat transfer tube that can suitably expand a tube body such as a heat transfer tube of a steam generator. It is an object of the present invention to provide a closing method and an electromagnetic coil.
  • the tube expansion jig of the present invention is a tube expansion jig for expanding a tube provided in a steam generator, and is generated by a probe inserted into the tube and a current supplied to the probe and supplied with power. And an electromagnetic coil capable of expanding the tubular body by electromagnetic force.
  • the electromagnetic coil inserted into the tubular body by the probe can expand the tubular body when electric current is supplied. For this reason, since it becomes possible to enlarge the amount of pipe expansion of a tubular body, so that the electric current value supplied to an electromagnetic coil is enlarged, the workability with respect to a tubular body can be improved. In addition, if a current is supplied to the electromagnetic coil, the tube can be expanded, so that the expansion operation can be simplified. From the above, it is possible to simplify the pipe expansion work and to suitably expand the pipe body such as the heat transfer pipe of the steam generator.
  • the tube is a heat transfer tube provided in the steam generator, the probe and the electromagnetic coil are inserted into the heat transfer tube, the current supplied to the electromagnetic coil is a pulse current, and the electromagnetic coil is It is preferable that the pulse current is supplied a plurality of times and the current value of the pulse current increases stepwise.
  • the electromagnetic coil can gradually expand the heat transfer tube because the current value of the pulse current supplied multiple times increases stepwise. For this reason, the heat transfer tube can be expanded while gradually approaching a predetermined expansion amount.
  • the probe further includes a tube diameter measuring unit that measures the tube diameter of the heat transfer tube.
  • the tube diameter of the heat transfer tube (which may be an inner diameter or an outer diameter) can be measured by the tube diameter measuring unit, so that the amount of expansion of the heat transfer tube can be measured. For this reason, since the heat transfer tube can be expanded while measuring the amount of expansion of the heat transfer tube, the heat transfer tube can be accurately expanded to a predetermined amount.
  • the electromagnetic coil is preferably divided at the center in the axial direction, and the tube diameter measuring unit is preferably disposed between the divided electromagnetic coils.
  • the tubular body is a repair short tube
  • the repair short tube is inserted into the heat transfer tube provided in the steam generator, and the probe and the electromagnetic coil are inserted into the repair short tube, It is preferable that the electromagnetic coil is expanded from the repair short tube, and the outer surface of the repair short tube is in close contact with the inner surface of the heat transfer tube.
  • the repaired short tube can be brought into close contact with the repaired portion of the heat transfer tube from the inner surface of the heat transfer tube. For this reason, it is possible to simply repair the heat transfer tube without performing welding or the like simply by expanding the short tube for repair with the electromagnetic coil.
  • the tubular body is a closed plug with one opening closed, the closed plug is inserted into a heat transfer tube provided in the steam generator, and the probe and the electromagnetic coil are inserted into the closed plug,
  • the electromagnetic coil preferably expands the plug and closes the outer surface of the plug to the inner surface of the heat transfer tube.
  • the plug can be brought into close contact with the closed portion of the heat transfer tube from the inner surface of the heat transfer tube. For this reason, it is possible to simply close the heat transfer tube without performing welding or the like simply by expanding the closing plug with the electromagnetic coil.
  • the heat transfer tube expansion method of the present invention is a heat transfer tube expansion method in which a heat transfer tube provided in a steam generator is expanded using a tube expansion jig.
  • the heat transfer tube vibrates the heat transfer tube on both sides in the radial direction.
  • a pair of vibration suppression members for suppression is provided, and the tube expansion jig is an electromagnetic that expands the heat transfer tube by an electromagnetic force generated by a probe inserted into the heat transfer tube and a pulse current that is provided in the probe and is fed with power.
  • a coil, and an insertion process for inserting a tube expansion jig inside the heat transfer tube, and the pulse current is supplied to the electromagnetic coil multiple times so that the current value of the pulse current increases stepwise.
  • a tube expanding step for expanding the tube until the heat transfer tubes contact with the pair of vibration suppressing members, respectively.
  • the vibration of the heat transfer tube is preferably suppressed by the pair of vibration suppression members. can do.
  • the tube expansion jig further includes a tube diameter measuring unit that measures the tube diameter of the heat transfer tube, and in the tube expansion step, the heat transfer tube is expanded while measuring the tube diameter of the heat transfer tube.
  • the tube diameter of the heat transfer tube (which may be an inner diameter or an outer diameter) can be measured by the tube diameter measuring unit, so that the amount of expansion of the heat transfer tube can be measured. For this reason, since the heat transfer tube can be expanded while measuring the amount of expansion of the heat transfer tube, the heat transfer tube can be expanded with high accuracy so that the heat transfer tube contacts the pair of vibration suppressing members.
  • the heat transfer tube repair method of the present invention is a heat transfer tube repair method in which a heat transfer tube provided in a steam generator is repaired using a tube expansion jig.
  • the tube expansion jig includes a probe inserted into the short repair pipe, and an electromagnetic coil that is provided in the probe and expands the short repair pipe by electromagnetic force generated by a current supplied to the probe.
  • the outer surface of the repaired short tube can be brought into close contact with the inner surface of the heat transfer tube by expanding the repaired short tube by a simple tube expansion operation, so that the heat transfer tube can be suitably repaired. it can.
  • the heat transfer tube closing method is a heat transfer tube closing method in which a heat transfer tube provided in a steam generator is closed using a tube expansion jig.
  • the tool includes a probe inserted into the plug, and an electromagnetic coil provided on the probe that expands the plug by an electromagnetic force generated by a supplied current.
  • a tube expansion jig is provided inside the plug. It is characterized by comprising an inserting step of inserting, and a tube expanding step of expanding the closed plug by supplying current to the electromagnetic coil and bringing the outer surface of the closed plug into close contact with the inner surface of the heat transfer tube.
  • the heat transfer tube can be preferably closed.
  • one divided first electromagnetic coil is arranged on the tip side of the probe, and the other second divided electromagnetic coil is arranged on the rear end side of the first divided electromagnetic coil,
  • the first divided electromagnetic coil and the second divided electromagnetic coil are connected so that a current from a power supply device can be passed.
  • the heat transfer tube can be expanded by the first divided electromagnetic coil and the second divided electromagnetic coil.
  • FIG. 1 is a schematic side sectional view of a steam generator in which the tube expansion jig of Example 1 is used.
  • FIG. 2 is a schematic perspective view of a heat transfer tube group provided in the steam generator.
  • FIG. 3 is a schematic diagram illustrating a schematic configuration of the tube expansion jig according to the first embodiment.
  • FIG. 4 is a graph of the pulse current supplied to the tube expansion jig of Example 1.
  • FIG. 5 is a graph of the amount of expansion of the heat transfer tube that changes according to the current value of the pulse current.
  • FIG. 6 is an explanatory diagram relating to a heat transfer tube expansion method using the tube expansion jig of the first embodiment.
  • FIG. 7 is a schematic diagram illustrating a schematic configuration of the tube expansion jig of the first modification.
  • FIG. 8 is a schematic diagram illustrating a schematic configuration of the tube expansion jig of the second embodiment.
  • FIG. 9 is an explanatory diagram regarding a heat transfer tube repairing method using the tube expansion jig of the second embodiment.
  • FIG. 10 is a schematic diagram illustrating a schematic configuration of the tube expansion jig according to the third embodiment.
  • FIG. 11 is an explanatory diagram relating to a heat transfer tube blocking method using the tube expansion jig of the third embodiment.
  • FIG. 1 is a schematic side sectional view of a steam generator in which the tube expansion jig of Example 1 is used.
  • a steam generator 1 used in a pressurized water reactor (PWR).
  • a primary coolant for example, light water
  • the primary coolant that has become high temperature and high pressure is subjected to heat exchange with the secondary coolant, thereby evaporating the secondary coolant to generate steam, and primary cooling that has become high temperature and pressure.
  • the material is cooling.
  • the steam generator 1 has a hollow cylindrical shape extending in the vertical direction and sealed.
  • the steam generator 1 has a trunk portion 2 whose 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 of the heat transfer tubes 5 is arranged so that the U-shaped arc portion is convex upward, and both end portions on the lower side are supported by the tube plate 4, and the intermediate portion includes a plurality of tube support plates 6. And is supported by the tube group outer tube 3. A large number of through holes (not shown) are formed in the tube support plate 6, and the heat transfer tubes 5 are inserted into 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 74 that communicates with the outside of the body portion 2, and the exit chamber 72 is formed with an exit nozzle 75 that communicates with the exterior of the body portion 2.
  • the inlet nozzle 74 is connected to a cooling water pipe (not shown) through which a primary coolant is sent from the pressurized water reactor, and the outlet nozzle 75 passes the primary coolant after heat exchange to the pressurized water reactor.
  • the cooling water piping (not shown) to send is connected.
  • the steam / water separator 9 that separates the secondary coolant after heat exchange into steam (gas phase) and hot water (liquid phase), and the moisture content of the separated steam
  • a moisture separator 10 is provided to remove the water and bring it to a state close to dry steam.
  • a water supply pipe 11 for supplying water of the secondary coolant from the outside into the body 2 is inserted.
  • drum 2 has the vapor
  • the body part 2 has a tube plate in which a secondary coolant supplied from the water supply pipe 11 into the body part 2 flows down between the body part 2 and the tube group outer cylinder 3 in the lower half part.
  • 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 coolant is connected.
  • the primary coolant heated in the pressurized water reactor is sent to the entrance chamber 71 and circulates through the numerous heat transfer tubes 5 to reach the exit chamber 72.
  • the secondary coolant 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 coolant and the secondary coolant in the body portion 2. Then, the cooled primary coolant is returned from the exit chamber 72 to the pressurized water reactor.
  • the secondary coolant that has exchanged heat with the high-pressure and high-temperature primary coolant rises in the body 2 and is separated into steam and hot water by the steam / water separator 9.
  • the separated steam is sent to the turbine after moisture is removed by the moisture separator 10.
  • FIG. 2 is a schematic perspective view of a heat transfer tube group provided in the steam generator.
  • the upper end portion of the heat transfer tube group 51 is formed in a hemispherical shape by arranging arc portions of a plurality of heat transfer tubes 5 having an inverted U shape. That is, as shown in FIG. 2, each heat transfer tube 5 is bent with a predetermined curvature radius in the plane.
  • the plurality of heat transfer tubes 5 are provided so that the radius of curvature increases in the radial direction of the curvature radius in each plane, and are arranged side by side so that the axial directions are parallel to each other, thereby forming the heat transfer tube layer 5A. .
  • the heat transfer tube layers 5A are arranged in parallel with a predetermined gap in an out-of-plane direction perpendicular to the in-plane direction.
  • the radius of curvature of each heat transfer tube 5 on the outermost side in the radial direction of the radius of curvature in the plane decreases toward the outer side in the out-of-plane direction.
  • the plurality of vibration suppressing members 14 are respectively inserted between the plurality of heat transfer tube layers 5A arranged in parallel.
  • Each vibration suppression member 14 is made of, for example, a metal material such as stainless steel, and is formed by bending a rod body having a rectangular cross section into a substantially V shape.
  • the vibration suppressing member 14 is arranged so that the bent part is located on the radial center side (inner side) of the radius of curvature of the heat transfer tube 5, and the both end parts thereof are arranged on the outer side in the radial direction.
  • the Both end portions of the vibration suppressing member 14 protrude outward from the heat transfer tube 5 located on the outermost side in the radial direction of the radius of curvature.
  • the plurality of vibration suppression members 14 include a vibration suppression member 14 having a large V shape and a vibration suppression member 14 having a small V shape. And the vibration suppression member 14 with a small V shape is arranged inside the vibration suppression member 14 with a large V shape to form a pair. For example, three pairs of the vibration suppressing members 14 forming a pair are arranged in a gap between two heat transfer tube layers 5A adjacent (stacked) in the out-of-plane direction. The three pairs of vibration suppressing members 14 are provided along the circumferential direction of the radius of curvature.
  • the plurality of vibration suppression members 14 are arranged so that the end portions of the plurality of vibration suppression members 14 extend in the out-of-plane direction of the heat transfer tube layer 5 ⁇ / b> A along the hemispherical arc of the heat transfer tube group 51. Are arranged in a row. Further, the end portions of the vibration suppressing members 14 in a row are arranged in a plurality of rows at predetermined intervals along the in-plane direction of the heat transfer tube layer 5A along the hemispherical arc of the heat transfer tube group 51. That is, the ends of the plurality of vibration suppressing members 14 are arranged in a lattice shape.
  • a joining member 15 is provided at each end of each vibration suppressing member 14.
  • the joining member 15 is joined to a holding member 16 described later.
  • the joining member 15 is made of a metal material such as stainless steel, for example.
  • the holding member 16 is a rod body formed in an arc shape along the hemispherical outer periphery of the heat transfer tube group 51 as shown in FIG.
  • the holding member 16 is arranged so as to connect the end portions of the vibration suppressing members 14 arranged in a line along the hemispherical arc of the heat transfer tube group 51.
  • the joining member 15 provided in the edge part of each vibration suppression member 14 is joined to this holding member 16 by welding.
  • V-shaped thing was used for the vibration suppression member 14, the thing of a rectangular parallelepiped shape (straight shape) is used, or the thing of a V shape and a rectangular parallelepiped shape are used together. There is no particular limitation.
  • FIG. 3 is a schematic diagram illustrating a schematic configuration of the tube expansion jig according to the first embodiment.
  • the tube expansion jig 80 includes a probe 81, an electromagnetic coil 82, and a tube diameter sensor (tube diameter measuring unit) 83.
  • a power supply device 84 that supplies current to the electromagnetic coil 82 and a control device 85 that controls the power supply device 84 are connected to the tube expansion jig 80.
  • the probe 81 is formed in a tubular shape, is inserted into the heat transfer tube 5, and is movable along the axial direction of the heat transfer tube 5. That is, the outer diameter of the probe 81 is smaller than the inner diameter of the heat transfer tube 5. Further, a tip member 81 a is provided on the tip side of the probe 81, and the tip member 81 a is formed in a circular plate shape having a diameter larger than that of the probe 81.
  • the electromagnetic coil 82 is fixed to the tip of the probe 81 in the insertion direction.
  • the axial direction of the electromagnetic coil 82 is the same as the axial direction of the probe 81. For this reason, in the electromagnetic coil 82, a current flows in the circumferential direction of the probe 81 around the axis of the probe 81.
  • the electromagnetic coil 82 generates an electromagnetic force when electric current is supplied from the power supply device 84, and expands the heat transfer tube 5 by the generated electromagnetic force.
  • the tube diameter sensor 83 is provided between the tip member 81 a of the probe 81 and the electromagnetic coil 82, and is attached to the probe 81.
  • the tube diameter sensor 83 measures the inner diameter of the heat transfer tube 5.
  • the tube diameter sensor 83 may measure the outer diameter of the heat transfer tube 5.
  • the pipe diameter sensor 83 is connected to the control device 85 and outputs a measurement result to the control device 85.
  • the power supply device 84 is connected to the electromagnetic coil 82 and supplies a current toward the electromagnetic coil 82.
  • the power supply device 84 supplies a pulse current that becomes a pulsed current as a current, and the current value of the pulse current can be appropriately varied.
  • the control device 85 is connected to the power supply device 84 and the tube diameter sensor 83, and can control the power supply device 84 based on the measurement result of the tube diameter sensor 83. Specifically, the control device 85 controls the power supply device 84 while acquiring the inner diameter of the heat transfer tube 5 from the measurement result of the tube diameter sensor 83, and the pulse current supplied from the power supply device 84 to the electromagnetic coil 82. The value is changed as appropriate.
  • FIG. 4 is a graph of the pulse current supplied to the tube expansion jig of Example 1.
  • FIG. 5 is a graph of the amount of expansion of the heat transfer tube that changes according to the current value of the pulse current.
  • the horizontal axis represents time
  • the vertical axis represents current value.
  • the control device 85 supplies a pulse current to the electromagnetic coil 82 from the power supply device 84 a plurality of times (for example, five times). At this time, the control device 85 supplies power so that the current value of the pulse current to be supplied increases stepwise. That is, the current value of the pulse current at the second power supply is larger than the current value of the pulse current at the first power supply. For this reason, the tube expansion jig 80 expands the heat transfer tube 5 so as to gradually widen the tube diameter of the heat transfer tube 5.
  • the control device 85 determines that the current value A1 of the pulse current that is fed last is such that the expansion amount of the heat transfer tube 5 becomes a predetermined expansion amount L1. ing.
  • the relationship between the current value of the pulse current and the amount of expansion of the heat transfer tube 5 is derived in advance based on experiments and the like.
  • the horizontal axis represents the current value
  • the vertical axis represents the amount of expansion of the heat transfer tube 5.
  • led-out the electric current value A1 corresponding to the predetermined pipe expansion amount L1 is derived
  • the control device 85 acquires a current value A1 corresponding to the set expansion amount L1 based on FIG. Then, the power supply device 84 is controlled so that the acquired current value A1 becomes the current value of the pulse current that is fed last.
  • FIG. 6 is an explanatory diagram relating to a heat transfer tube expansion method using the tube expansion jig of the first embodiment.
  • the heat transfer tube 5 is in a state in which a pair of vibration suppressing members 14 are arranged on both sides in the radial direction.
  • a gap is generated between the vibration suppressing member 14 and the heat transfer tube 5.
  • the heat transfer tube 5 is brought into contact with the vibration suppressing member 14 by expanding a part of the heat transfer tube 5 using the tube expansion jig 80.
  • the tip of the probe 81 of the tube expansion jig 80 is inserted from one end of the heat transfer tube 5 located on the tube plate 4 (step S11: insertion step). At this time, the probe 81 is inserted until the electromagnetic coil 82 provided on the probe 81 is positioned between the pair of vibration suppressing members 14. When the probe 81 is inserted, the inner diameter of the heat transfer tube 5 is also measured by the tube diameter sensor 83.
  • the control device 85 directs the pulse current shown in FIG. 4 to the electromagnetic coil 82 so that the current value of the pulse current increases stepwise. Power multiple times. For this reason, the electromagnetic coil 82 gradually expands the diameter of the heat transfer tube 5 and expands the heat transfer tube 5 until the heat transfer tube 5 comes into contact with the pair of vibration suppression members 14 (step S12: tube expansion step). At this time, the controller 85 expands the heat transfer tube 5 while measuring the inner diameter of the heat transfer tube 5 by the tube diameter sensor 83 during the execution of the tube expansion step of S12. In addition, you may measure the internal diameter of the heat exchanger tube 5 for every electric power feeding of pulse current.
  • the control device 85 may appropriately change the current value of the pulse current based on the measurement result by the tube diameter sensor 83. For example, before supplying the last pulse current, the controller 85 may perform feedback correction so that the current value of the last pulse current is increased if the amount of expansion of the heat transfer tube 5 is insufficient. In addition, before supplying the last pulse current, the controller 85 may perform feedback correction so that the current value of the last pulse current becomes small if the amount of expansion of the heat transfer tube 5 is sufficient.
  • the electromagnetic coil 82 inserted into the heat transfer tube 5 by the probe 81 can expand the heat transfer tube 5 by supplying a pulse current. For this reason, since it becomes possible to enlarge the amount of pipe expansion of the heat exchanger tube 5, so that the electric current value supplied to the electromagnetic coil 82 is enlarged, the workability with respect to the heat exchanger tube 5 can be improved. Further, if a pulse current is supplied to the electromagnetic coil 82, the heat transfer tube 5 can be expanded, so that the tube expansion operation can be simplified. From the above, the tube expansion work can be simplified, and the heat transfer tube 5 of the steam generator 1 can be expanded appropriately.
  • the current value of the pulse current supplied to the electromagnetic coil 82 increases stepwise, so that the heat transfer tube 5 can be gradually expanded. For this reason, it is possible to gradually expand the heat transfer tube 5 so as to have a predetermined expansion amount.
  • the heat transfer tube 5 is expanded by a simple tube expansion process of supplying a pulse current to the electromagnetic coil 82, and the expanded heat transfer tube 5 is easily brought into contact with the pair of vibration suppressing members 14. Can be made. For this reason, the vibration of the heat transfer tube 5 can be suitably suppressed by the pair of vibration suppressing members 14.
  • the heat transfer tube 5 can be expanded while the inner diameter of the heat transfer tube 5 is measured by the tube diameter sensor 83. For this reason, since the amount of expansion of the heat transfer tube 5 can be grasped, the heat transfer tube 5 can be expanded with high accuracy. For this reason, since the heat transfer tube 5 can be expanded while measuring the amount of expansion of the heat transfer tube 5, the heat transfer tube 5 is accurately expanded so that the heat transfer tube 5 contacts the pair of vibration suppressing members 14. Can do.
  • the tube diameter sensor 83 may measure the outer diameter of the heat transfer tube 5.
  • FIG. 7 is a schematic diagram illustrating a schematic configuration of the tube expansion jig of the first modification.
  • the electromagnetic coil 82 is divided into two in the axial direction, and a pipe diameter sensor 83 is arranged between the two divided electromagnetic coils 82.
  • the electromagnetic coil 82 is divided into a first divided electromagnetic coil 82a and a second divided electromagnetic coil 82b at the center in the axial direction.
  • the second divided electromagnetic coil 82b is disposed on the distal end side of the probe 81
  • the first divided electromagnetic coil 82a is disposed on the rear end side of the second divided electromagnetic coil 82b.
  • the first divided electromagnetic coil 82a and the second divided electromagnetic coil 82b are connected so that a current from the power supply device 84 can be passed.
  • the tube diameter sensor 83 is disposed between the first divided electromagnetic coil 82 a and the second divided electromagnetic coil 82 b and is attached to the probe 81.
  • the tube diameter of the heat transfer tube 5 can be measured at the center of the electromagnetic coil 82 in the axial direction. That is, since the tube diameter at the center in the axial direction of the heat transfer tube 5 expanded in the axial direction by the electromagnetic coil 82 can be measured, the amount of expansion of the heat transfer tube 5 can be grasped with higher accuracy.
  • FIG. 8 is a schematic diagram illustrating a schematic configuration of the tube expansion jig of the second embodiment.
  • FIG. 9 is an explanatory diagram regarding a heat transfer tube repairing method using the tube expansion jig of the second embodiment.
  • the tube expansion jig 80 of the second embodiment has the same configuration as the tube expansion jig 80 of the first embodiment, and the heat transfer tube 5 is repaired using the tube expansion jig 80.
  • a repair method of the heat transfer tube 5 using the tube expansion jig 80 will be described.
  • a cylindrical short repair tube 90 having an outer diameter smaller than the inner diameter of the heat transfer tube 5 is inserted into the heat transfer tube 5. At this time, a gap is formed between the inner surface of the heat transfer tube 5 and the outer surface of the short repair pipe 90.
  • the repair short tube 90 has a length capable of covering the repaired portion of the heat transfer tube 5. The tip of the probe 81 and the electromagnetic coil 82 are inserted into the short repair pipe 90.
  • the tip of the probe 81 of the tube expansion jig 80 is inserted from one end of the heat transfer tube 5 located on the tube plate 4 (step S21: insertion step).
  • the repair short tube 90 is inserted together with the probe 81.
  • the probe 81 is inserted until the electromagnetic coil 82 reaches the repair location of the heat transfer tube 5.
  • the inner diameter of the heat transfer tube 5 is also measured by the tube diameter sensor 83.
  • the control device 85 supplies the pulse current shown in FIG. 4 to the electromagnetic coil 82 a plurality of times so that the current value of the pulse current increases stepwise. To do. For this reason, the electromagnetic coil 82 gradually expands the diameter of the short repair pipe 90 (step S22), and expands the short repair pipe 90 until the outer surface of the short repair pipe 90 is in close contact with the inner surface of the heat transfer tube 5 ( Step S23: tube expansion step). At this time, even during the execution of the tube expansion process of S22, the control device 85 expands the short repair pipe 90 while measuring the inner diameter of the heat transfer tube 5 by the tube diameter sensor 83 (step S22: tube diameter measurement). Process).
  • the repair short tube 90 is expanded by a simple tube expansion process of supplying a pulse current to the electromagnetic coil 82, and the outer surface of the expanded repair short tube 90 is applied to the heat transfer tube. 5 can be brought into close contact with the inner surface. For this reason, the heat transfer tube 5 can be easily repaired.
  • the tube expansion jig 80 according to the second embodiment may be the tube expansion jig 80 according to the first modification, or may be a tube expansion jig in which the tube diameter sensor 83 is omitted.
  • FIG. 10 is a schematic diagram illustrating a schematic configuration of the tube expansion jig according to the third embodiment.
  • FIG. 11 is an explanatory diagram relating to a heat transfer tube blocking method using the tube expansion jig of the third embodiment.
  • the tube expansion jig 100 according to the third embodiment has a configuration in which the tube diameter sensor 83 of the tube expansion jig 80 according to the first embodiment is omitted, and the heat transfer tube 5 is closed using the tube expansion jig 100.
  • a method for closing the heat transfer tube 5 using the tube expansion jig 100 will be described.
  • the tube expansion jig 100 includes a probe 81 and an electromagnetic coil 82 provided at the tip of the probe 81, and a power supply device 84 is connected to the electromagnetic coil 82.
  • the power supply device 84 supplies a pulse current to the electromagnetic coil 82.
  • the power supply device 84 supplies the pulse current to the electromagnetic coil 82 once, so that the heat transfer tube 5 has a predetermined tube expansion amount.
  • a cylindrical plug 101 having a closed one opening having an outer diameter smaller than the inner diameter of the heat transfer tube 5 is inserted into the heat transfer tube 5.
  • a gap is formed between the inner surface of the heat transfer tube 5 and the outer surface of the blocking plug 101.
  • the closing plug 101 is formed in a shape in which a cross section cut in the axial direction is formed in a concave shape, and the heat transfer tube 5 can be closed.
  • the tip of the probe 81 and the electromagnetic coil 82 are inserted into the closing plug 101 from the other opening.
  • the closing plug 101 is disposed at a portion of the heat transfer tube 5 around which the tube plate 4 is disposed.
  • the tip of the probe 81 of the tube expansion jig 100 is inserted from one end of the heat transfer tube 5 located on the tube plate 4 (step S31: insertion step).
  • the closing plug 101 is inserted together with the probe 81.
  • the probe 81 is inserted until the electromagnetic coil 82 reaches the tube plate 4.
  • step S32 the control device 85 supplies a pulse current to the electromagnetic coil 82 once. For this reason, the electromagnetic coil 82 expands the diameter of the closing plug 101 (step S32), and the outer surface of the closing plug 101 is brought into close contact with the inner surface of the heat transfer tube 5 (step S33: tube expansion process).
  • the plug plug 101 is expanded by a simple tube expansion process of supplying a pulse current to the electromagnetic coil 82, and the outer surface of the expanded plug plug 101 is connected to the inner surface of the heat transfer tube 5. It can be adhered. For this reason, the heat transfer tube 5 can be easily closed.
  • the tube expansion jig 100 of the third embodiment the tube expansion jig 80 provided with the tube diameter sensor 83 as in the first embodiment may be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)

Abstract

L'invention porte sur un procédé de dilatation d'un tube de transfert de chaleur (5) monté sur un générateur de vapeur à l'aide d'un dispositif de dilatation de tube (80), dans lequel sont disposés une paire d'éléments de suppression de vibration (14), pour supprimer la vibration du tube de transfert de chaleur (5), sur les deux côtés du tube de transfert de chaleur (5), dans sa direction radiale, le dispositif de dilatation de tube (80) étant équipé d'une sonde (81) insérée dans le tube de transfert de chaleur (5) et aussi d'une bobine électromagnétique (82) montée sur la sonde (81) et qui dilate le tube de transfert de chaleur (5) au moyen d'une force électromagnétique produite par un courant électrique pulsé appliqué à la bobine électromagnétique (82), et le procédé de dilatation du tube de transfert de chaleur (5) comportant : une étape d'insertion (S11) consistant à insérer le dispositif de dilatation de tube (80) dans le tube de transfert de chaleur (5) ; une étape de dilatation de tube (S12) consistant à appliquer le courant électrique pulsé à la bobine électromagnétique (82) à plusieurs reprises de telle sorte que la valeur du courant électrique pulsé s'accroît par étapes incrémentales, en dilatant ainsi le tube de transfert de chaleur (5) jusqu'à ce que le tube de transfert de chaleur (5) soit en contact un avec les deux éléments de suppression de vibration (14).
PCT/JP2013/072466 2012-08-24 2013-08-22 Dispositif de dilatation de tube, procédé de dilatation de tube de transfert de chaleur, procédé de réparation de tube de transfert de chaleur, procédé de fermeture de tube de transfert de chaleur, et bobine électromagnétique WO2014030719A1 (fr)

Applications Claiming Priority (2)

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JP2012-185659 2012-08-24
JP2012185659A JP2014042920A (ja) 2012-08-24 2012-08-24 拡管治具、伝熱管の拡管方法、補修方法及び閉塞方法

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WO2019013303A1 (fr) * 2017-07-12 2019-01-17 株式会社神戸製鋼所 Unité de bobine destinée à un moulage électromagnétique et procédé destiné à la production d'un article moulé mettant en œuvre ladite unité de bobine
JP2019018245A (ja) * 2017-07-12 2019-02-07 株式会社神戸製鋼所 電磁成形コイルユニット、及びこれを用いた成形体の製造方法
CN110793375A (zh) * 2019-11-07 2020-02-14 江苏科技大学 一种振动强化换热装置及换热装置组
CN111468587A (zh) * 2020-04-13 2020-07-31 三峡大学 基于内外侧双向加载的管件电磁胀形装置与方法
CN111515291A (zh) * 2020-04-30 2020-08-11 华中科技大学 一种金属管件的电磁成形装置及方法
CN112872161A (zh) * 2021-01-11 2021-06-01 中国工程物理研究院机械制造工艺研究所 一种钢铅复合管的电磁成形方法

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JP6605775B1 (ja) * 2018-08-08 2019-11-13 株式会社神戸製鋼所 管部材のかしめ接合方法
CN109967594B (zh) * 2019-03-18 2020-07-07 三峡大学 一种采用轴向电磁拉力减小管件压缩时起皱的装置及方法
CN109967593B (zh) * 2019-03-18 2020-06-16 三峡大学 一种采用径向恒定磁场与感应涡流实现管件电磁胀形轴向压缩的装置及方法
CN111238334B (zh) * 2020-03-05 2021-05-07 焦作大学 一种具有跳动值检测标记功能的桶体成型设备及其成型方法
JP7132283B2 (ja) * 2020-06-30 2022-09-06 三菱重工業株式会社 蒸気発生器の分解方法

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WO2019013303A1 (fr) * 2017-07-12 2019-01-17 株式会社神戸製鋼所 Unité de bobine destinée à un moulage électromagnétique et procédé destiné à la production d'un article moulé mettant en œuvre ladite unité de bobine
JP2019018245A (ja) * 2017-07-12 2019-02-07 株式会社神戸製鋼所 電磁成形コイルユニット、及びこれを用いた成形体の製造方法
CN110869142A (zh) * 2017-07-12 2020-03-06 株式会社神户制钢所 电磁成形线圈单元及使用其的成形体的制造方法
CN110869142B (zh) * 2017-07-12 2021-12-28 株式会社神户制钢所 电磁成形线圈单元及使用其的成形体的制造方法
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CN111468587A (zh) * 2020-04-13 2020-07-31 三峡大学 基于内外侧双向加载的管件电磁胀形装置与方法
CN111515291A (zh) * 2020-04-30 2020-08-11 华中科技大学 一种金属管件的电磁成形装置及方法
CN112872161A (zh) * 2021-01-11 2021-06-01 中国工程物理研究院机械制造工艺研究所 一种钢铅复合管的电磁成形方法

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