JP5660886B2 - Steam generator manufacturing method and pipe support plate assembly apparatus - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention is used for a steam generator manufacturing method in which a plurality of heat transfer tubes are inserted into a tube support plate, and for aligning the tube support plate at a predetermined position of the heat transfer tube in the manufacture of the steam generator. The present invention relates to a tube support plate assembling apparatus.

  In the steam generator, a tube support plate for inserting and supporting a plurality of heat transfer tubes is disposed in the body portion. A plurality of the tube support plates are arranged in the length direction of the heat transfer tubes, and a plurality of heat transfer tube insertion holes through which the heat transfer tubes are inserted are formed. The heat transfer tube insertion hole of the tube support plate is provided with a plurality of projecting portions provided with contact surfaces for supporting the heat transfer tube so as to protrude radially inward from the inner surface of the hole (for example, see Patent Document 1). ).

JP 2007-271157 A

  In manufacturing the steam generator described above, each tube support plate is disposed in the body, and then the heat transfer tube is inserted into the heat transfer tube insertion hole. At this time, the outer peripheral surface of the heat transfer tube and the contact surface of the protruding portion in the heat transfer tube insertion hole come into contact, but if there is a deviation in the mounting position of each tube support plate, the contact between the heat transfer tube and the contact surface There is a risk that bias occurs, the insertion resistance of the heat transfer tube increases, and the outer peripheral surface of the heat transfer tube is damaged. When scratches occur on the outer peripheral surface of the heat transfer tube, the stress remains, causing stress corrosion cracking of the heat transfer tube.

  This invention solves the subject mentioned above, and can manufacture the steam generator which can align a pipe support plate in a suitable position, and can align a pipe support plate in a suitable position. It is an object of the present invention to provide a pipe support plate assembly apparatus.

  In order to achieve the above-described object, the method of manufacturing a steam generator according to the present invention includes a tube support plate in which a plurality of heat transfer tube insertion holes for inserting and supporting a plurality of heat transfer tubes are disposed in a cylindrical body. A method of manufacturing a steam generator, wherein one end of a line member is disposed with respect to a plurality of tube holes in a tube plate fixed to one end side of the body part placed horizontally, and each of the line members A step of disposing an end on the other end side of the body portion, and a step of aligning the linear member with respect to the center of the tube hole and the center of the heat transfer tube inserted through the tube hole; Next, the wire members are inserted into the predetermined heat transfer tube insertion holes of the tube support plate, and the tube support plates are arranged so that the wire members coincide with the center positions of the heat transfer tube insertion holes. And a step of adjusting the mounting position.

  According to this method of manufacturing a steam generator, the center of the tube hole in the tube plate fixed to the trunk portion and the center of the heat transfer tube insertion hole in each tube support plate are connected by the line member, and the wire member is By adjusting the position of each tube support plate as a reference, the tube support plate can be aligned at a suitable position.

  In order to achieve the above-mentioned object, the tube support plate assembly apparatus of the present invention arranges a tube support plate in which a plurality of heat transfer tube insertion holes for inserting and supporting a plurality of heat transfer tubes is disposed in a cylindrical body. An apparatus for assembling a tube support plate for a tube plate side, in which one end of the line member is disposed at the center position of the tube hole in the tube member fixed to the one end side of the body member placed horizontally An attachment side and a centering side attachment that positions the other end of the linear member on the other end side of the body portion and aligns the linear member at the center of the heat transfer tube supported by the tube support plate And a center position indicating unit that indicates a center position of the heat transfer tube insertion hole with respect to the wire member in a state where the wire member is inserted into the predetermined heat transfer tube insertion hole of the tube support plate. It is characterized by that.

  According to this tube support plate assembling apparatus, the center of the tube hole in the tube plate fixed to the body portion and the center of the heat transfer tube insertion hole in each tube support plate are connected by the line member, and the line member is used as a reference. By adjusting the position of each tube support plate, the tube support plate can be aligned at a suitable position.

  In the tube support plate assembling apparatus of the present invention, the tube plate side attachment portion is inserted into one end side of the wire member and fitted into the tube hole, so that the wire member is attached to the tube hole. One end-side centering member disposed at a central position, and tension applying means for applying tension to the linear member that is fixed to one end side of the linear member and spanned between the centering-side mounting portion; It is characterized by providing.

  According to this pipe support plate assembly apparatus, in order to align the pipe support plate at a suitable position, one end side of the linear member can be arranged at the center position of the pipe hole.

  Further, in the tube support plate assembling apparatus of the present invention, the centering side attaching portion is fixed to the other end side of the body portion, and the other end of the linear member is attached to the fixing member. A support member that detachably supports the side, and the other end side of the linear member is positioned on an extension of the center of the heat transfer tube that is inserted into the tube hole to which one end of the linear member is fixed. Position adjusting means for adjusting the position of the support member with respect to the fixing member.

  According to this tube support plate assembly apparatus, in order to align the tube support plate at a suitable position, the center of the tube hole to which one end of the linear member is fixed and the center of the heat transfer tube inserted through the tube hole are arranged. On the extension, the other end side of the wire member can be arranged. In addition, since the support member removably supports the other end side of the linear member, the position adjusting means adjusts the position of the support member relative to the fixing member, and then the linear member is piped while maintaining the adjusted position. It can be passed through the heat transfer tube insertion hole of the support plate.

  In the tube support plate assembling apparatus of the present invention, the center position indicating portion is configured to be inserted through the linear member, and is fitted in the predetermined heat transfer tube insertion hole. It has the coordinate which shows the positional relationship of the center of a heat pipe penetration hole, and the said linear member.

  According to this pipe support plate assembling apparatus, the position of the heat transfer pipe insertion hole with respect to the wire member can be easily shown in order to align the pipe support plate at a suitable position.

  According to the present invention, the tube support plate can be aligned at a suitable position.

FIG. 1 is a schematic sectional side view of a steam generator according to an embodiment of the present invention. FIG. 2 is a schematic sectional side view showing a state where the pipe support plate is assembled in the method for manufacturing a steam generator according to the embodiment of the present invention. FIG. 3 is a schematic sectional side view showing a method for manufacturing a steam generator according to an embodiment of the present invention. FIG. 4 is a schematic side view showing a method for manufacturing a steam generator according to an embodiment of the present invention. FIG. 5 is a side sectional view showing a tube plate side mounting portion of a tube support plate assembling apparatus used in the method for manufacturing a steam generator according to the embodiment of the present invention. FIG. 6 is a front view showing a centering side mounting portion of the tube support plate assembling apparatus. FIG. 7 is a partially enlarged front view showing a centering side mounting portion of the tube support plate assembling apparatus. FIG. 8 is a partially enlarged side sectional view showing the centering side mounting portion of the tube support plate assembling apparatus. FIG. 9 is a partially enlarged exploded side sectional view showing a centering side mounting portion of the tube support plate assembling apparatus. FIG. 10 is a side sectional view showing a center position indicating unit of the tube support plate assembling apparatus. FIG. 11 is a front view showing a center position indicating unit of the tube support plate assembling apparatus. FIG. 12 is a side view of a gantry used in the method for manufacturing a steam generator according to the embodiment of the present invention. FIG. 13 is a front view of a gantry used in the method for manufacturing a steam generator according to the embodiment of the present invention.

  Embodiments according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  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. In the steam generator 1, 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 up-down direction and is hermetically sealed, and has a trunk 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 5A is provided in the tube group outer tube 3. The heat transfer tube group 5A 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 is inserted and supported in the tube hole 4 a of the tube plate 4, and the intermediate portion is interposed through the plurality of tube support plates 6. It is supported by the tube group outer tube 3. The tube support plate 6 is formed with a large number of heat transfer tube insertion holes 6a, and the heat transfer tubes 5 are inserted into the heat transfer tube insertion holes 6a to support the heat transfer tubes 5.

  The body 2 is provided with a water chamber 7 at its lower end. The interior of the water chamber 7 is divided into an entrance chamber 7A and an exit chamber 7B by a partition wall 8. One end of each heat transfer tube 5 communicates with the entrance chamber 7A, and the other end of each heat transfer tube 5 communicates with the exit chamber 7B. Further, the entrance chamber 7A is formed with an inlet nozzle 7Aa that communicates with the outside of the body portion 2, and the exit chamber 7B is formed with an exit nozzle 7Ba that communicates with the outside of the body portion 2. The inlet nozzle 7Aa 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 7Ba sends the primary cooling water after heat exchange to the pressurized water reactor. The cooling water piping (not shown) to send is connected.

  In the upper half of the body portion 2, 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. Between the steam / water separator 9 and the heat transfer tube group 5A, a water supply pipe 11 for supplying secondary cooling water from the outside into the body 2 is inserted. Furthermore, the trunk | drum 2 has the vapor | steam exhaust port 12 formed in the upper end part. Further, 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. 4, a water supply passage 13 is formed that is folded back and raised along the heat transfer tube group 5A. 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.

  In such a steam generator 1, the primary cooling water heated in the pressurized water reactor is sent to the entrance chamber 7 </ b> A, circulates through the numerous heat transfer tubes 5, and reaches the exit chamber 7 </ b> B. On the other hand, the secondary cooling water cooled by the condenser is sent to the water supply pipe 11 and rises along the heat transfer pipe group 5 </ b> A 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 exit chamber 7B to the pressurized water reactor. On the other hand, 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 side cross-sectional view showing a state where the pipe support plate is assembled in the method for manufacturing a steam generator according to the present embodiment, and FIG. 3 is a process for manufacturing the steam generator according to the present embodiment. It is a schematic sectional side view which shows a method, FIG. 4: is a schematic side view which shows the manufacturing method of the steam generator which concerns on this Embodiment.

  In manufacturing the steam generator 1 described above, each tube support plate 6 includes an upper half portion of the trunk portion 2, an air / water separator 9, a moisture separator 10, and a water supply pipe 11 provided in the upper half portion. It is attached to the lower half part of the trunk | drum 2 before arrange | positioning. As shown in FIG. 2, the lower half of the body portion 2 is placed horizontally on the mounting table 14, and the tube sheet 4 is attached to one end side (the left side in FIG. 2). The tube group outer cylinder 3 is attached to the inside. Thereafter, each tube support plate 6 is attached in the tube group outer tube 3. Thereafter, the heat transfer tube 5 is passed through the heat transfer tube insertion hole 6a of each tube support plate 6 from the other end side (the right side in FIG. 2) in the lower half portion of the body portion 2, and the tube hole of the tube plate 4 The heat transfer tube group 5 </ b> A is arranged in a hemispherical shape on the upper side of the lower half portion of the body portion 2 by being inserted and fixed to 4 a.

  Here, referring to FIG. 11, the heat transfer tube insertion hole 6 a of each tube support plate 6 has a plurality (three in the present embodiment) of protruding portions 6 b that protrude from the inner peripheral surface thereof. . The protrusions 6b are arranged at equal intervals in the circumferential direction of the heat transfer tube insertion hole 6a. The heat transfer tube 5 is supported in contact with the contact surface 6c at the tip of the protruding portion 6b in a state of being penetrated through the heat transfer tube insertion hole 6a of each tube support plate 6. And if there is a shift in the mounting position of each tube support plate 6, the heat transfer tube to the contact surface 6 c of the heat transfer tube insertion hole 6 a when passing through the heat transfer tube 5 through the heat transfer tube insertion hole 6 a of each tube support plate 6. The contact of 5 may be biased, the insertion resistance of the heat transfer tube 5 may increase, and the outer peripheral surface of the heat transfer tube 5 may be damaged. When scratches occur on the outer peripheral surface of the heat transfer tube 5, stress remains, which causes stress corrosion cracking of the heat transfer tube 5.

  Therefore, in the method of manufacturing the steam generator according to the present embodiment, when assembling the tube support plate 6, as shown in FIG. 3, a plurality (in the tube plate 4 fixed to one end side of the horizontal body portion 2 ( In this embodiment, one end of each linear member 20 is arranged with respect to the four tube holes 4a, and the other end of each linear member 20 is arranged on the other end side of the trunk portion 2. Thereby, the linear member 20 is bridged between the one end side and the other end side of the trunk | drum 2. As shown in FIG. The wire member 20 is a carbon steel wire (generally referred to as a piano wire) having a predetermined diameter (for example, a diameter of 0.3 [mm]).

  Next, tension is applied to each linear member 20, and each linear member 20 is aligned with the center of each tube hole 4a and the center of each heat transfer tube 5 inserted through the tube hole 4a.

  Next, each wire member 20 is inserted into a predetermined heat transfer tube insertion hole 6a of the tube support plate 6, and the position of the tube support plate 6 is adjusted so that each wire member 20 coincides with the center position of each heat transfer tube insertion hole 6a. adjust.

  Thereafter, the tube support plate 6 whose position is adjusted is attached to the tube group outer tube 3.

  And with respect to all the tube support plates 6, the position of the tube support plate 6 is adjusted so that each linear member 20 may correspond to the center position of each heat-transfer tube insertion hole 6a, and the said tube support plate 6 is removed from a pipe group. Attach to the tube 3.

  According to such a method of manufacturing a steam generator, the center of the tube hole 4 a in the tube plate 4 fixed to the body portion 2 and the center of the heat transfer tube insertion hole 6 a in each tube support plate 6 are the linear members 20. The tube support plates 6 are connected to each other at appropriate positions by adjusting the positions of the tube support plates 6 with reference to the linear member 20. As a result, when the heat transfer tubes 5 are passed through the heat transfer tube insertion holes 6a of the tube support plates 6, a situation in which the heat transfer tubes 5 are not biased in contact with the contact surfaces 6c of the heat transfer tube insertion holes 6a is prevented. It is possible to avoid scratches on the outer peripheral surface of the heat pipe 5. By avoiding the occurrence of scratches on the outer peripheral surface of the heat transfer tube 5, residual stress is eliminated, and stress corrosion cracking of the heat transfer tube 5 can be prevented.

  By the way, since the linear member 20 bends due to gravity, it is necessary to consider the amount of bending in a state of being stretched between the one end side and the other end side of the body portion 2. Therefore, in the manufacturing method of this steam generator, the deflection amount of the linear member 20 is measured in advance. Specifically, as shown in FIG. 4, each end portion of the linear member 20 is attached to a column 25 having the same height. The dimension between the end portions of the linear member 20 is the same as the dimension over which the linear member 20 is bridged between the one end side and the other end side of the trunk portion 2. Then, in one strut 25, a weight 26 is fixed to the end of the line member 20, and tension is applied to the line member 20 by the weight 26. In this state, the positions (# 1 to # 7) of the tube support plates 6 are set on the linear member 20. Then, the optical measuring instrument (for example, laser measuring instrument) 27 is focused on each end of the linear member 20, and the line 27 a that connects the focal points at the position of each tube support plate 6 and the linear member 20. Deviation is measured as the amount of deflection. The measured deflection amount is used as a correction value when aligning each linear member 20 with respect to the center of each tube hole 4a and the center of each heat transfer tube 5 inserted through the tube hole 4a. The wire member 20 is not limited to the piano wire, and may be a wire member that can regulate the amount of bending.

  Hereinafter, a pipe support plate assembling apparatus used in a method for manufacturing a steam generator will be described. FIG. 5 is a side sectional view showing a tube plate side mounting portion of the tube support plate assembling apparatus used in the steam generator manufacturing method according to the present embodiment, and FIG. 6 is a centering of the tube support plate assembling apparatus. FIG. 7 is a partially enlarged front view showing a centering side mounting portion of the tube support plate assembly apparatus, and FIG. 8 is a centering side mounting portion of the pipe support plate assembly apparatus. FIG. 9 is a partially enlarged exploded side sectional view showing a centering side mounting portion of the tube support plate assembling apparatus, and FIG. 10 is a central position of the tube support plate assembling apparatus. FIG. 11 is a front sectional view showing a center position indicating unit of the pipe support plate assembling apparatus, and FIG. 12 is used in the method for manufacturing a steam generator according to the present embodiment. FIG. 13 is a side view of the gantry, and FIG. 13 is a front view of the gantry used in the method for manufacturing the steam generator according to the present embodiment.

  The tube support plate assembling apparatus includes a linear member 20, a tube plate side attachment portion 21, a centering side attachment portion 22, a center position instruction portion 23, and a gantry 24.

  As shown in FIG. 3, the tube plate-side attachment portion 21 is configured to dispose one end of the linear member 20 at the center position of the tube hole 4 a in the tube plate 4 fixed to one end side of the horizontal body 2. Yes, as shown in FIG. 5, it has one end side centering member 211 and tension applying means 212.

  The one end side centering member 211 is inserted through the opening on the outside (the water chamber 7 side) of the body portion 2 in the tube hole 4a of the tube plate 4, and has an insertion portion 211a inserted through the tube hole 4a. doing. The insertion portion 211a is formed so that the diameter of the columnar shape substantially matches the inner diameter of the tube hole 4a having a circular cross section, and is fitted into the tube hole 4a while being inserted into the tube hole 4a. The insertion portion 211a has a through hole 211b that passes through the center of the columnar shape and passes through the linear member 20. That is, in a state where the insertion portion 211a is inserted through the tube hole 4a, the through hole 211b is positioned at the center of the tube hole 4a, and the linear member 20 inserted through the through hole 211b is formed at the center of the tube hole 4a. Will be placed.

  Further, the one end side centering member 211 is formed with a flange portion 211c having an outer diameter larger than the inner diameter of the tube hole 4a at the end portion of the insertion portion 211a. The flange portion 211c abuts the outer surface (water chamber 7 side) of the tube plate 4 with the insertion portion 211a inserted into the tube hole 4a, so that the insertion portion 211a is immersed in the tube hole 4a. This is used as a part where a finger is applied when the insertion part 211a is taken out from the tube hole 4a.

  The tension applying means 212 is inserted through the opening on the outer side (water chamber 7 side) of the body portion 2 in the tube hole 4a of the tube plate 4, and has a rod-shaped insertion portion 212a inserted through the tube hole 4a. doing. The insertion portion 212a is formed so that the diameter of the columnar shape substantially matches the inner diameter of the tube hole 4a having a circular cross section, and is fitted into the tube hole 4a while being inserted into the tube hole 4a. Further, the tension applying means 212 extends in a direction in which the insertion portion 212a is inserted into the tube hole 4a at a portion where the insertion portion 212a protrudes to the outside (water chamber 7 side) of the tube plate 4, and A rod-like support portion 212b having an outer diameter larger than the inner diameter is provided. In addition, the tension applying means 212 is provided with a pulley 212c that is rotatably provided to an arm that hangs downward at an end portion where the support portion 212b moves away from the tube plate 4. The pulley 212c is inserted in the insertion portion 211a of the one end side centering member 211 in a state where the insertion portion 212a is inserted into a predetermined tube hole 4a that is above the tube hole 4a in which the one end side centering member 211 is inserted. The wire member 20 inserted through the through hole 211b is provided so as to be hung horizontally. A weight 212d is attached to the end of the linear member 20 hung on the pulley 212c. Thereby, tension is applied between the tube-sheet-side attachment portion 21 and a later-described centering-side attachment portion 22 with respect to the linear member 20 inserted into the through-hole 211b of the insertion portion 211a of the one-end-side centering member 211. Will be.

  In addition, as shown in FIG. 5, the tube-sheet-side attachment portion 21 has a filament for holding the end of the linear member 20 when the end of the linear member 20 and the weight 212d are removed from each other. It has a member latching part 213 and a weight latching part 214 for latching the weight 212d. Each latching part 213, 214 is attached to the lower position of the one end side centering member 211 by being inserted through the tube hole 4a below the tube hole 4a through which the one end side centering member 211 is inserted. .

  As shown in FIG. 3, the centering side attachment portion 22 is arranged to arrange the other end of the linear member 20 on the other end side of the horizontal body portion 2, and as shown in FIGS. 6 to 9, A fixing member 221, a supporting member 222, and position adjusting means 223 are provided.

  As shown in FIG. 3, the fixing member 221 is fixed to the opening end on the other end side of the body portion 2 by welding. As shown in FIG. 6, the fixing member 221 is formed in a long shape, the base end thereof is fixed to the opening end on the other end side of the trunk portion 2, and the distal end is elongated toward the inside of the trunk portion 2. Is formed. This fixing member 221 is provided corresponding to the number of the line members 20, and is attached to four places in the present embodiment. Further, the fixing member 221 has a hinge part 221a formed in the middle part of the long length, and is folded into two via the hinge part 221a, so that the tube group outer cylinder 3 arranged in the trunk part 2 is provided. While being retracted from the front position of the opening, the tip is arranged at the front position of the opening of the tube group outer tube 3 by being linearly extended through the hinge portion 221a. Note that the fixing member 221 is formed of H-shaped steel in the present embodiment.

  As shown in FIG. 6, the support member 222 is attached to the distal end of the fixing member 221 and supports the other end side of the linear member 20. As shown in FIGS. 7 to 9, the support member 222 is attached to the base portion 2221 fixed to the fixing member 221, the frame portion 2222 attached to the base portion 2221, the guide portion 2223 attached to the frame portion 2222, and the guide portion 2223. A linear member support 2224 is provided.

  As shown in FIGS. 7 and 8, the base 2221 is formed in a flat plate shape, and is fixed to the tip of the fixing member 221 by welding or the like. The base 2221 has a notch 2221a formed in a part so as to open, and is formed in a U-shape when viewed from the front, and the opening is arranged in the direction of the distal end of the fixing member 221. Further, the fixing member 221 is formed with a notch 221b so that the tip is opened. That is, the base 2221 and the fixing member 221 are both provided so as to open in the same direction. In addition, the base portion 2221 has two mounting plates 2221b for mounting the frame portion 2222 facing up and down and fixed in parallel to the left and right.

  As shown in FIGS. 7 and 8, the frame portion 2222 is a cylindrical frame body that is formed in a rectangular shape when viewed from the front, and is disposed between the mounting plates 2221 b of the base portion 2221. The frame portion 2222 is penetrated by two rod-like members 2221c that are spanned in parallel in the vertical direction between the mounting plates 2221b, and is guided by the rod-like member 2221c so as to be movable only in the vertical direction. Further, the frame portion 2222 penetrates from below the top end of the vertical adjustment bolt 2221d that is threaded through the upper mounting plate 2221b of the base portion 2221 and screwed into the lower mounting plate 2221b of the base portion 2221. The vertical movement of the vertical adjustment bolt 2221d is restricted by contacting the outer surface of the vertical frame.

  As shown in FIGS. 7 to 9, the guide portion 2223 is a block formed in a rectangular shape, and is arranged within the frame of the frame portion 2222. The guide portion 2223 is provided such that the upper surface and the lower surface thereof are in contact with the inner surfaces of the upper and lower frames of the frame portion 2222. In addition, the upper and lower surfaces of the guide portion 2223 and the inner surfaces of the upper and lower frames of the frame portion 2222 are provided to be fitted to each other by stepped portions that are continuous in the left-right direction. For this reason, the guide portion 2223 is provided so as to be movable in the left-right direction with respect to the frame portion 2222 while being prevented from coming off to the tube plate 4 side with respect to the frame portion 2222. In addition, the guide portion 2223 has a plurality of (three in this embodiment) fixing bolts 2222a threaded through the upper frame of the frame portion 2222 from above and a lower frame of the frame portion 2222 from below. The positions of the plurality of (three in the present embodiment) fixing bolts 2222a screwed through are in contact with each other, whereby the vertical position with respect to the frame portion 2222 is defined. Further, the guide portion 2223 has a left and right adjustment bolt 2222b threaded through the left frame of the frame portion 2222 from the left and a left and right adjustment bolt threaded through the right frame of the frame portion 2222 from the right. The left and right movements are restricted by the tip of 2222b coming into contact with the left and right surfaces. The guide portion 2223 is formed with a circular through hole 2223 a penetrating toward the tube plate 4.

  As shown in FIGS. 7 to 9, the linear member support portion 2224 includes an outer member 2224A, an inner member 2224B, and a retaining member 2224C.

  The outer member 2224A is formed in a cylindrical shape and is inserted into the through hole 2223a of the guide portion 2223. Further, the outer member 2224A is formed with a flange portion 2224Aa protruding outward. For this reason, the outer member 2224A is prevented from coming off so as not to come out to the tube plate 4 side with respect to the through hole 2223a of the guide portion 2223. Further, the outer member 2224A is formed with a slit 2224Ab so as to open to the side so that a midway portion of the linear member 20 can be inserted and removed.

  The inner member 2224B is formed in a cylindrical shape and is inserted into the outer member 2224A. Further, the inner member 2224B is formed with a flange portion 2224Ba that protrudes outward. For this reason, the inner member 2224B is prevented from coming off so as not to come out toward the tube plate 4 with respect to the outer member 2224A. Further, the inner member 2224B is closed on the side opposite to the tube sheet 4, and a hole 2224Bb is formed through which the linear member 20 is inserted. The inner member 2224B is formed in a size that can pass through the through hole 2223a of the guide portion 2223. That is, the inner member 2224B is prevented from slipping out through the outer member 2224A so as not to come out toward the tube plate 4 with respect to the through hole 2223a. The inner member 2224B has an outer diameter that can be inserted into the heat transfer tube insertion hole 6a of the tube support plate 6.

  The retaining member 2224C has an outer diameter larger than the inner diameter of the hole 2224Bb of the inner member 2224B, and is fixed to the other end of the linear member 20 passed through the hole 2224Bb. Prevents the inner member 2224B from coming out of the hole 2224Bb.

  That is, the support member 222 supports the linear member 20 at one end side with respect to the guide portion 2223 by the outer member 2224A, the inner member 2224B, and the retaining member 2224C forming the linear member support portion 2224.

  As shown in FIGS. 7 and 8, the position adjusting means 223 is provided such that the frame portion 2222 is movable in the vertical direction with respect to the base portion 2221, and the guide portion 2223 is movable in the left-right direction with respect to the frame portion 2222. In the support member 222 described above, the vertical adjustment bolts 2221d for restricting the vertical movement of the frame portion 2222 with respect to the base portion 2221 fixed to the fixing member 221 and the left and right sides of the guide portion 2223 with respect to the frame portion 2222 are provided. It is comprised with each left-right adjustment bolt 2222b which regulates a movement. That is, the vertical position of the frame portion 2222 with respect to the base portion 2221 is adjusted by changing the screwing position of the vertical adjustment bolt 2221d with respect to the mounting plate 2221b of the base portion 2221. Further, by changing the screwing position of the left / right adjustment bolt 2222b with respect to the frame portion 2222, the left / right position of the guide portion 2223 with respect to the frame portion 2222 is adjusted. Thereby, one end is arranged at the center position of the tube hole 4a of the tube plate 4 by the one end side centering member 211 of the tube plate side attaching portion 21, and the other end side of the trunk portion 2 is arranged by the centering side attaching portion 22. The position of the other end side of the linear member 20 with the end arranged on the tube plate side attachment portion 21 is adjusted by the position adjusting unit 223 up, down, left and right in a state where the tension is applied. Thus, the other end side is adjusted so as to be positioned on the extension of the center of the heat transfer tube 5 supported by the tube support plate 6.

  As shown in FIGS. 10 and 11, the center position indicating portion 23 is fitted into a predetermined heat transfer tube insertion hole 6 a through which the linear member 20 is inserted in the tube support plate 6 attached to the tube group outer tube 3. . The center position instruction | indication part 23 is comprised as a cylinder which has an outer diameter substantially the same as the outer diameter of the heat exchanger tube 5 penetrated by the heat exchanger tube penetration hole 6a. For this reason, the center position instruction | indication part 23 is supported in contact with the contact surface 6c of the front-end | tip of the protrusion part 6b in the state inserted in the heat exchanger tube penetration hole 6a. The center position indicating portion 23 is formed by closing one end side, and a through hole 23a through which the linear member 20 passes is formed in that portion. The through hole 23 a is disposed at the center of the center position instruction unit 23. Further, the center position indicating portion 23 is coordinated around the through hole 23a on the outer surface of the closed portion on one end side so as to indicate the center position of the center position indicating portion 23 and the center position of the heat transfer tube insertion hole 6a. 23b is marked. The center position indicating portion 23 communicates with the through hole 23a and is formed with a slit 23c so as to open to the side so that a midway portion of the linear member 20 can be inserted and removed. Moreover, the center position instruction | indication part 23 has the collar part 23d which protrudes on the outer periphery of the obstruct | occluded part by the side of one end. For this reason, the center position instruction | indication part 23 is prevented from falling with respect to the heat exchanger tube penetration hole 6a by the collar part 23d.

  This center position instruction | indication part 23 inserts the filament member 20 from the slit 23c, and the said filament member 20 reaches the position of the through-hole 23a. In this state, when the center position indicating portion 23 is fitted into the predetermined heat transfer tube insertion hole 6a, the positional relationship between the center of the heat transfer tube insertion hole 6a and the linear member 20 is indicated by the coordinates 23b.

  As shown in FIGS. 12 and 13, the gantry 24 supports the tube support plate 6 and adjusts the position of the tube support plate 6 with respect to the tube group outer cylinder 3. The gantry 24 supports the frame 241 that can move in the tube group outer cylinder 3 and the tube support plate 6, and the supported tube support plate 6 with respect to the frame 241 in the vertical direction, the left-right direction, the front-back tilt direction, and the left-right tilt. And a position adjusting unit 242 that moves in the rotation direction.

  The frame 241 is provided with a rotary wheel 241 a that abuts against the inner peripheral surface of the tube group outer cylinder 3 so as to be able to rotate. That is, the frame 241 can be moved in the front-rear direction (indicated by arrows in FIG. 12) between the one end side and the other end side in the tube group outer cylinder 3 by the wheel 241a. In addition, the frame 241 is provided with a plurality of scaffolds 241b on which workers are placed.

  The position adjustment unit 242 includes a support unit 242 a that supports the tube support plate 6, and a moving unit 242 b that is interposed between the support unit 242 a and the frame 241. The support portion 242a supports the tube support plate 6 by fitting a fitting pin (not shown) into a predetermined heat transfer tube insertion hole 6a of the tube support plate 6. The support portion 242a is provided so as to be movable in the vertical direction and the horizontal direction with respect to the moving portion 242b.

  The vertical movement of the support portion 242a is such that the worm 243a extending in the vertical direction is rotatably provided on the support portion 242a, and the worm wheel is provided on the gear box 243b fixed to the moving portion 242b side. Done. That is, by rotating the worm wheel of the gear box 243b, the worm 243a moves in the vertical direction together with the support portion 242a, and accordingly, the tube support plate 6 moves in the vertical direction.

  The movement of the support portion 242a in the left-right direction is such that a worm 244a extending in the left-right direction is rotatably provided on the support portion 242a, and a worm wheel is provided in a gear box 244b fixed to the moving portion 242b side. Done. That is, by rotating the worm wheel of the gear box 244b, the worm 244a moves in the left-right direction together with the support portion 242a, and accordingly, the tube support plate 6 moves in the left-right direction.

  Further, the moving part 242b is provided so as to be movable in the front-rear tilt direction, the left-right tilt direction, and the rotation direction via a joint 245 provided at a position substantially coincident with the center of the tube group outer cylinder 3 with respect to the frame 241. ing.

  Movement of the moving part 242b in the front-rear tilt direction and the left-right tilt direction is performed by bolts 246 provided at four positions on the frame 241 in the vertical and horizontal directions. For example, two upper bolts 246 are set as one set, and two lower bolts 246 are set as one set, and each set is adjusted to move the moving part 242b in the forward / backward tilt direction. 242a moves in the front-rear tilt direction, and the upper and lower ends of the tube support plate 6 move back and forth. Further, the two moving bolts 246 are set as one set, and the two right bolts 246 are set as one set. By adjusting each set, the moving portion 242b moves in the left-right inclined direction, and accordingly, the supporting portion 242a. Moves in the left-right tilt direction, and the left and right ends of the tube support plate 6 move back and forth. Moreover, the movement of the moving part 242b in the rotational direction is performed by bolts 247 provided at two positions on the left and right sides of the frame 241. That is, by adjusting the left and right bolts 247, the moving part 242b moves around the joint 245, and accordingly, the support part 242a rotates and the tube support plate 6 rotates.

  Hereinafter, the detail of the manufacturing method of the steam generator using the pipe support plate assembly apparatus mentioned above is demonstrated.

  First, as shown in FIGS. 6 and 8, a centering side mounting portion 22 is installed on the other end side of the horizontal barrel portion 2 shown in FIG. 3, and a line is connected to the other end side of the horizontal barrel portion 2. The other end of the strip member 20 is disposed.

  Next, as shown in FIG. 5, a tube plate side mounting portion 21 is installed on one end side of the horizontal barrel portion 2 shown in FIG. 3, and the tube hole 4 a on one end side of the horizontal barrel portion 2 is installed. One end of the linear member 20 is disposed. Tension is applied to the linear member 20 by the tension applying means 212 of the tube plate side attachment portion 21.

  Next, the position adjustment means 223 of the centering side attachment portion 22 adjusts the position of the other end side of the linear member 20 vertically and horizontally, and is supported by the tube support plate 6 at the center of the tube hole 4a. It adjusts so that the filament member 20 may be located on extension of the center of the heat exchanger tube 5. FIG.

  Next, one end of the wire member 20 is removed from the weight 212d of the tube plate side attachment portion 21 to release the tension, and the other end of the wire member 20 is removed from the centering side attachment portion 22 as shown in FIG. . That is, in the centering side attachment portion 22, the outer member 2224A is extracted from the through hole 2223a of the guide portion 2223, the inner member 2224B is extracted from the outer member 2224A, and the filament member 20 is removed via the slit 2224Ab of the outer member 2224A. Remove from outer member 2224A. Accordingly, only the inner member 2224B and the retaining member 2224C that are inserted into the heat transfer tube insertion hole 6a of the tube support plate 6 are attached to the other end of the linear member 20.

  Next, in the centering side attachment portion 22, the fixing member 221 is folded in two via the hinge portion 221a, and the fixing member 221 is moved from the front position of the opening of the tube group outer tube 3 disposed in the trunk portion 2. evacuate. Thereby, it becomes possible to carry in the tube support plate 6 from the opening of the tube group outer tube 3. The tube support plate 6 is supported by the gantry 24.

  Next, the other end of the wire member 20 is inserted together with the inner member 2224B and the retaining member 2224C into a predetermined heat transfer tube insertion hole 6a of the tube support plate 6 carried in from the opening of the tube group outer tube 3. At this time, the heat transfer tube insertion hole 6a into which the other end of the wire member 20 is inserted is the same as the heat transfer tube 5 inserted through the tube hole 4a to which one end of the wire member 20 is first attached. Then, the fixing member 221 is returned linearly via the hinge portion 221a, the inner member 2224B is returned to the outer member 2224A, and the outer member 2224A is returned to the through hole 2223a of the guide portion 2223. Further, a weight 212 d is attached to one end of the linear member 20 to apply tension to the linear member 20. Thereby, the filament member 20 arrange | positioned on the extension of the center of the heat exchanger tube 5 is penetrated with respect to the tube hole 4a and the heat exchanger tube penetration hole 6a in which the same heat exchanger tube 5 is penetrated.

  Next, the tube support plate 6 is moved to a predetermined attachment position to the tube group outer cylinder 3 by the gantry 24. Then, the linear member 20 is inserted from the slit 23c of the central position indicating portion 23, the linear member 20 is passed through the central position indicating portion 23, and the central position instruction is indicated in the heat transfer tube insertion hole 6a through which the linear member 20 is inserted. The part 23 is fitted. Thereby, the positional relationship between the center of the four heat transfer tube insertion holes 6a in the tube support plate 6 supported by the gantry 24 and the linear member 20 can be confirmed.

  Next, the position of the tube support plate 6 is adjusted by the position adjusting portion 242 of the gantry 24 so that the linear member 20 is positioned at the center of each heat transfer tube insertion hole 6a.

  Finally, the tube support plate 6 is fixed to the tube group outer tube 3 when the linear member 20 is positioned at the center of each heat transfer tube insertion hole 6a.

  As described above, the above-described tube support plate assembling apparatus has one end of the line member 20 at the center position of the tube member 4 and the tube hole 4a in the tube plate 4 fixed to the one end side of the horizontal body 2. While arranging the other end of the line member 20 on the other end side of the tube plate side mounting portion 21 and the body portion 2 to be arranged, the line member 20 is positioned at the center of the heat transfer tube 5 supported by the tube support plate 6. The center which shows the center position of the heat-transfer tube insertion hole 6a with respect to the line member 20 in the state which the centering side attaching part 22 and the line member 20 to match | combine are inserted in the predetermined heat-transfer tube insertion hole 6a of the tube support plate 6 A position instruction unit 23.

  According to this tube support plate assembling apparatus, the center of the tube hole 4a in the tube plate 4 fixed to the trunk portion 2 and the center of the heat transfer tube insertion hole 6a in each tube support plate 6 are connected by the linear member 20, By adjusting the position of each tube support plate 6 with reference to the line member 20, the tube support plate 6 can be aligned at a suitable position. As a result, when the heat transfer tubes 5 are passed through the heat transfer tube insertion holes 6a of the tube support plates 6, a situation in which the heat transfer tubes 5 are not biased in contact with the contact surfaces 6c of the heat transfer tube insertion holes 6a is prevented. It is possible to avoid scratches on the outer peripheral surface of the heat pipe 5. By avoiding the occurrence of scratches on the outer peripheral surface of the heat transfer tube 5, residual stress is eliminated, and stress corrosion cracking of the heat transfer tube 5 can be prevented.

  In the tube support plate assembling apparatus described above, the tube plate side attachment portion 21 is inserted into the tube hole 4a at one end side of the line member 20, and the tube member 4 is fitted to the tube hole 4a. The tension applying means 212 that applies tension to the linear member 20 that is fixed between the one end side centering member 211 arranged at the position and the one end side of the linear member 20 and spanned between the centering side mounting portion 22. And comprising.

  According to this pipe support plate assembly apparatus, in order to align the pipe support plate 6 at a suitable position, it is possible to arrange one end side of the linear member 20 at the center position of the pipe hole 4a.

  Further, in the above-described tube support plate assembly apparatus, the centering side attachment portion 22 is fixed to the other end side of the body portion 2, and the other end of the linear member 20 is attached to the fixing member 221. The other end side of the filament member 20 is positioned on the extension of the center of the heat transfer tube 5 inserted into the tube hole 4a to which one end of the filament member 20 is fixed and the support member 222 that detachably supports the side. Position adjusting means 223 (up / down adjustment bolt 2221d and left / right adjustment bolt 2222b) for adjusting the position of the support member 222 with respect to the fixing member 221 is provided.

  According to this tube support plate assembling apparatus, on the extension of the center of the tube hole 4a to which one end of the line member 20 is fixed and the center of the heat transfer tube 5 inserted through the tube hole 4a, It is possible to arrange the other end side. Moreover, since the support member 222 removably supports the other end side of the linear member 20, the position adjustment unit 223 adjusts the position of the support member 222 relative to the fixing member 221, and then maintains the adjusted position. The wire member 20 can be passed through the heat transfer tube insertion hole 6 a of the tube support plate 6.

  Further, in the tube support plate assembling apparatus described above, the center position indicating portion 23 is configured to be inserted through the linear member 20, and the heat transfer tube insertion is performed in a state where the center position indicating portion 23 is fitted in a predetermined heat transfer tube insertion hole 6a. Coordinates 23b indicating the positional relationship between the center of the hole 6a and the linear member 20 are provided.

  According to this pipe support plate assembling apparatus, the position of the heat transfer pipe insertion hole 6a with respect to the wire member 20 can be easily shown in order to align the pipe support plate 6 at a suitable position.

  As described above, the method for manufacturing a steam generator and the pipe support plate assembly apparatus according to the present invention are suitable for aligning the pipe support plate at a suitable position.

DESCRIPTION OF SYMBOLS 1 Steam generator 2 Body 3 Tube group outer cylinder 4 Tube plate 4a Tube hole 5 Heat transfer tube 6 Tube support plate 6a Heat transfer tube insertion hole 6b Projection part 6c Contact surface 20 Line member 21 Tube plate side attachment part 211 One end side core Protruding member 211a Insertion part 211b Passing hole 211c Ridge part 212 Tension applying means 212a Insertion part 212b Support part 212c Pulley 212d Weight 22 Centering side attachment part 221 Fixing member 221a Hinge part 221b Notch 222 Supporting part 2221a Notch 2221a Notch 2221a Bar-shaped member 2221d Vertical adjustment bolt 2222 Frame portion 2222a Fixing bolt 2222b Left / right adjustment bolt 2223 Guide portion 2223a Through hole 2224 Line member support portion 2224A Outer member 2224Aa Hook portion 2224Ab Slit 2224B Inner member 2224Ba Hook portion 22 4Bb hole 2224C clasp member 223 position adjusting means 23 central position instruction section 23a through hole 23b coordinate 23c slit 23d flange portion

Claims (5)

A steam generator manufacturing method in which a tube support plate in which a plurality of heat transfer tube insertion holes for inserting and supporting a plurality of heat transfer tubes is formed is disposed in a cylindrical body,
One end of the line member is arranged in a plurality of tube holes in the tube plate fixed to one end side of the body part placed horizontally, and the other end of each line member is arranged on the other end side of the body part. And a process of
Next, the step of aligning the linear member with respect to the center of the tube hole and the center of the heat transfer tube inserted through the tube hole;
Next, the wire members are inserted into the predetermined heat transfer tube insertion holes of the tube support plate, and the tube support plates are arranged so that the wire members coincide with the center positions of the heat transfer tube insertion holes. Adjusting the mounting position;
A method for producing a steam generator, comprising: A tube support plate assembly device for arranging a tube support plate formed with a plurality of heat transfer tube insertion holes for inserting and supporting a plurality of heat transfer tubes in a cylindrical body,
Wire members;
A tube plate side mounting portion that arranges one end of the linear member at the center position of the tube hole in the tube plate fixed to one end side of the body portion placed horizontally;
While arranging the other end of the linear member on the other end side of the body portion, a centering side mounting portion for aligning the linear member with the center of the heat transfer tube supported by the tube support plate;
In the state where the wire member is inserted into the predetermined heat transfer tube insertion hole of the tube support plate, a center position indicating unit indicating a center position of the heat transfer tube insertion hole with respect to the wire member,
An apparatus for assembling a pipe support plate, comprising: The tube sheet side mounting portion is
One end side centering member that is disposed at the center position of the tube hole by inserting the one end side of the wire member and being fitted into the tube hole;
Tension applying means for applying tension to the linear member that is fixed to one end side of the linear member and spanned between the centering side mounting portion;
The tube support plate assembly apparatus according to claim 2, further comprising: The centering side mounting portion is
A fixing member fixed to the other end side of the body part;
A support member attached to the fixing member and removably supporting the other end of the linear member;
The position of the support member relative to the fixed member is such that the other end side of the linear member is positioned on the extension of the center of the heat transfer tube inserted through the tube hole to which one end of the linear member is fixed. Position adjusting means to adjust;
The pipe support plate assembling apparatus according to claim 2 or 3, characterized by comprising:   The center position indicating portion is configured to be inserted through the wire member, and in a state of being fitted into a predetermined heat transfer tube insertion hole, between the center of the heat transfer tube insertion hole and the wire member. 5. The pipe support plate assembly apparatus according to claim 2, wherein the pipe support plate assembly apparatus has coordinates indicating a positional relationship.

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