JP4723978B2 - Condenser and condenser assembly method - Google Patents

Description

  The present invention relates to a condenser applied to a power plant, and more particularly to a condenser and a condenser assembling method that can be reduced in weight and size during transportation and can be easily assembled after being brought into the field.

  For condensers applied to recent power plants, from the review of simplification of work and cost reduction, for example, as seen in Patent Documents 1 to 3, a bundle of many heat transfer tubes is bundled. The tube plate and support plate to be supported are divided and manufactured in advance at the factory. After the tube bundle supported by the divided tube plate and support plate is brought to the site, the divided tube plate and support plate are assembled by welding, bolts, etc. There has been proposed a technique for housing the main body after connection.

  The condenser assembled in this way heat-condenses and condenses the turbine exhaust that has finished the expansion work in the steam turbine 1, regenerates the condensed condensate, and returns it to the boiler. There are those shown in FIGS.

  The condenser is configured to include a connection body part 2 connected to the steam turbine 1 and a main body body part 3 communicating with the connection body part 2.

  The connecting body portion 2 forms an expanded passage 4 in the flow direction so as to recover the pressure of the turbine exhaust from the steam turbine 1 and not generate a drift in the flow.

  On the other hand, the main body body 3 divides the inlet water chamber 5 and the outlet water chamber 6 provided on both sides, and includes an inlet side tube plate 7 and an outlet side tube plate 8 that support the plurality of heat transfer tubes 9. Yes.

  Moreover, the main body trunk | drum 3 supports the intermediate part of the some heat exchanger tube 9 with the some support plate 10 arrange | positioned with a suitable pitch, and unites it as a group among the heat transfer tubes 9 supported by the support plate 10. FIG. The tube bundle 11 to be handled collectively is accommodated, and a hot well 12 for collecting condensed water after condensation is provided at the bottom.

The condenser having such a configuration, after recovering the pressure loss of the turbine exhaust from the steam turbine 1 at the connection body portion 2, heat exchanges with the tube bundle 11 accommodated in the body body portion 4, and after condensing, It is stored in the hot well 12 as condensate. In the condenser, cooling water, for example, seawater is supplied to each of the heat transfer tubes 9 constituting the tube bundle 11 as a group from the inlet water chamber 5 via the inlet side tube plate 7.
JP 2002-257492 A JP 2002-286378 A JP 2003-240478 A

  In the condensers disclosed in Patent Documents 1 to 3, as the capacity increases, the area of the tube plate and the support plate that support the heat transfer tubes also increases. The amount of welding between the support plates is remarkably increased, and there are problems such as deformation due to the influence of welding heat.

  The present invention was made based on such circumstances, and reduced the amount of deformation of the tube plate and the support plate due to welding heat, and further reduced the number of assembling steps to reduce the labor of workers. It is an object of the present invention to provide a condenser and a method for assembling the condenser.

In order to achieve the above object, a condenser according to the present invention includes a tube plate and a support plate that support a bundle of tubes that constitute a group of a plurality of heat transfer tubes as described in claim 1. preparative in condenser to be accommodated in the body carcass part, together with the tube plate are those that have been divided, the flange is provided on the side surface of the steam side for each of the divided tube sheet, the divided tubesheet the side surface of the sea side plate against the dividing plane of abutted with welding to connect the divided tube plates are by welding the backing plate, provided on a side surface of the vapor side of said split tubesheet is obtained by the configuration of connecting fastening the divided tube plates are by fastening the flanges together in fasteners.

Further, condenser according to the present invention, in order to achieve the above object, as described in claim 2, is provided with a fitting rib to the divided tube sheet.

Further, condenser according to the present invention, in order to achieve the above object, as described in claim 3, the front Kisasae plate has been divided, split surfaces of the split bearing plate Is provided with a connecting member.

Further, condenser according to the present invention, in order to achieve the above object, as described in claim 4, wherein the connecting member is also of Ru Ah in shape steel.

Further, condenser according to the present invention, in order to achieve the above object, as described in claim 5, provided with a fitting ribs on the side surface of the sea side of the divided tube plate, is the divided In addition, a reinforcing member is provided on the steam side surface of the tube sheet.

Further, condenser according to the present invention, in order to achieve the above object, as described in claim 6, before Kisasae plate has been divided, one side of the divided support plate Any one of the fitting rib and the reinforcing member is provided only on the divided surface.

Further, condenser according to the present invention, in order to achieve the above object, as described in claim 7, the front Kisasae plate has been divided, split surfaces of the split bearing plate The wedge is inserted into the structure.

Moreover, in order to achieve the above-mentioned object, the condenser assembling method according to the present invention applies the one described in claims 1 to 7 to a power plant as described in claim 8 .

Moreover, in order to achieve the above-mentioned object, the condenser assembling method according to the present invention supports a bundle of tubes that constitute a group of a plurality of heat transfer tubes as described in claim 9. papermaking create a tubesheet and support plates in the factory, the tube plate while being divided prior to assembly of the support plate on site, flanges provided on each of the divided tube sheet to the side of the steam-side is the time of assembling the divided tube sheet and said support plate on site, divided by said divided tubesheet caul plate in the divided surface of the side of the sea side of abutted to weld the caul with the tube plates are welded connections, is the divided tubesheet method flanges together provided on the side surface of the steam side Ru the divided tube plates are then fastened connected by fastening with fasteners .

The method of assembling a condenser according to the present invention, in order to achieve the above object, as described in claim 10, the pre-Symbol divided tube sheet and said support plate prior to assembly on site a method of providing a fitting rib on the divided tube sheet.

Further, in the condenser assembly method according to the present invention, in order to achieve the above-mentioned object, as described in claim 11 , the support plate is divided before assembling with the tube plate in the field, after the mounting the divided supporting plate connecting member at the factory dividing plane of, when assembling said divided tube plate and the divided support plates local, it is a method for welding connecting the connecting member to each other .

The method of assembling a condenser according to the present invention, in order to achieve the above object, as described in claim 12, after attaching the fitting ribs dividing plane before Symbol divided tubesheet, when assembling the front Symbol divided tube sheet and said support plate on site, a method of attaching a reinforcing member to the tube plate.

Further, in the condenser assembly method according to the present invention, in order to achieve the above-mentioned object, as described in claim 13 , the support plate is divided before assembling with the tube plate in the field, when assembling the said divided support plate and the divided tube sheet locally, a method of inserting the wedge in the divided surface of the support plate.

  In the condenser and the condenser assembly method according to the present invention, the tube plate and the support plate that support the heat transfer tubes are divided and manufactured in the factory, and the tube plate and the support plate that are divided on site are assembled. Since the contact plate is brought into contact with the divided surface on one side of the tube plate and welded, and a flange is provided on the other side of the tube plate and connected with a fastener, the welding amount is reduced. It is possible to further reduce the deformation due to the welding heat and reduce the labor of the worker by further reducing the number of on-site assembly steps.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a condenser and a condenser assembling method according to an embodiment of the present invention will be described with reference to the drawings and reference numerals attached to the drawings.

  FIG. 1 is a conceptual diagram showing a condenser and a condenser assembly method according to a first embodiment of the present invention.

  For example, a condenser applied to a power plant has a configuration including a connection body part 21 connected to the steam turbine 20 and a main body body part 22 communicating with the connection body part 21.

  The connecting body portion 21 is an expanded passage 23 that gradually expands in the flow direction so as to recover the pressure of the turbine exhaust that exits from the steam turbine 20 and to prevent a drift in the flow.

  In addition, the connecting body portion 21 is provided with a feed water heater 24, piping (not shown) such as a bleed pipe and a condensate pipe, etc. in order to effectively use the installation area.

  On the other hand, the main body body portion 22 is divided into an inlet water chamber 25 and an outlet water chamber 26 provided on both sides, and includes an inlet side tube plate 28 and an outlet side tube plate 29 that support a plurality of heat transfer tubes 27. Yes.

  Further, the main body 22 is configured such that intermediate portions of the plurality of heat transfer tubes 27 are supported by a plurality of support plates 30, and the heat transfer tubes 27 supported by the support plates 30 are bent into, for example, a U shape and arranged in a tube. A tube bundle 31 configured as a group is accommodated, and a hot well 32 is provided at the bottom for condensing and collecting the turbine exhaust.

  In the condenser having such a configuration, after the pressure of the turbine exhaust that has exited the steam turbine 20 is recovered by the connecting body part 22, heat is exchanged by the tube bundle 31 of the body body part 22, and after condensation, the condensate is recovered. As shown in FIG.

  In addition, the heat transfer tubes 27 constituting the tube bundle 31 flow cooling water such as seawater from the inlet water chamber 25 toward the outlet water chamber 26 in the tubes, thereby cooling the turbine exhaust flowing outside the tubes.

  In the condenser having such a configuration, as shown in FIG. 2, in the present embodiment, a plurality of, for example, two divided inlet side tube plates 28 and an outlet side that support a tube bundle 31 that constitutes a heat transfer tube 27 as a group. As shown in FIG. 3, one side of the tube plate 29 is brought into contact with the dividing surface 33a and the edge thereof is fixed by fillet welding.

  In addition, when the work space is wide, the inlet side tube plate 28 and the outlet side tube plate 29 are provided with flanges 35a and 35b on the dividing surface 33b, as shown in FIG. The fasteners 36 are connected to each other.

  As described above, in the present embodiment, of the inlet side tube plate 28 and the outlet side tube plate 29, the contact plate 34 is provided on the divided surfaces 33a and 33b on one side surface, and the flange 35a is provided on the divided surfaces 33a and 33b on the other side surface. , 35b, and after the abutment plate 34 and the flanges 35a, 35b, etc. are manufactured at the factory, the abutment plate 34 is brought into contact with the divided surfaces 33a, 33b at the site and the edges thereof are welded together, while the other side surface is divided. Since the flanges 35a and 35b provided on the surfaces 33a and 33b are connected to each other by the fasteners 36 to reduce the welding amount, the deformation of the tube plates 28 and 29 due to welding can be further reduced.

  Further, in the present embodiment, the contact plate 34 is brought into contact with the divided surfaces 33a and 33b on one side surface of the tube plates 28 and 29, and the edges thereof are welded to each other. Can be maintained.

  In the present embodiment, the contact plate 34 is brought into contact with the divided surfaces 33a and 33b on one side surface of the tube plates 28 and 29, and the flanges 35a and 35b are provided on the divided surfaces 33a and 33b on the other side surfaces to fasten each other. Although it was made the structure connected by the tool 36, it is not restricted to this example, You may make it only the connection by the fastener 36 of the flange 35a, 35b only at the side plate 34 at least one side among each tube board 28,29. .

  5 and 6 are conceptual diagrams showing a second embodiment of the condenser and the condenser assembling method according to the present invention.

  As shown in FIG. 5, the present embodiment supports a tube bundle 31 that constitutes a heat transfer tube 27 as a group, and a plurality of, for example, two divided inlet side tube plates 28 and outlet side tube plates 29 are provided on one side surface. Fitting ribs 37a and 37b are provided on the dividing surfaces 33c and 33d.

  As shown in FIG. 6, the fitting ribs 37 a and 37 b are, for example, changed in size in size and welded to the split surfaces 33 c and 33 d of the inlet side tube plate 28 and the outlet side tube plate 29.

  As described above, in the present embodiment, the fitting ribs 37a and 37b are provided on the divided surfaces 33c and 33d of the tube plates 28 and 29, and the fitting ribs 37a and 37b are manufactured at the factory, and then the fitting ribs 37a and 37b are locally installed. Since the tube plates 28 and 29 are welded and connected to increase the rigidity of the tube plates 28 and 29, the fitting surfaces 37c and 33d of the tube plates 28 and 29 are welded to the fitting ribs 37a and 37b. However, it is possible to prevent deformation of the tube sheets 28 and 29 due to welding heat.

  7 and 8 are conceptual views showing a third embodiment of the condenser and the condenser assembling method according to the present invention.

  In this embodiment, as shown in FIG. 7, a plate-like support plate 30 that supports a tube bundle 31 that constitutes a heat transfer tube 27 as a group is divided into a plurality of, for example, two at the center along the axial direction, and the upper half is supported. It is divided into a plate 30a and a lower half support plate 30b, and connecting members 38a and 38b are provided on the divided surfaces 33e and 33f of the upper half support plate 30a and the lower half support plate 30b divided into two. .

  As shown in FIG. 8, the connecting members 38a and 38b are shaped steels such as I beams 39a and 39b provided on the dividing surfaces 33e and 33f, and the shaped steels such as I beams 39a and 39b are welded to each other. Is.

  Thus, in the present embodiment, the support plate 30 that supports the tube bundle 31 is divided at the center, and the connection members 38a and 38b are provided on the divided surfaces 33e and 33f of the divided upper and lower half support plates 30a and 30b. After mounting 38a, 38b, etc. at the factory, the construction is such that welding connection is performed at the site, so there is no need to adjust the gap between the tube bundle 31 and the support plate 30 during assembly at the site, and the assembly process is further shortened. This can further reduce the labor of the worker.

  FIG. 9 is a conceptual diagram showing a fourth embodiment of the condenser and the method of assembling the condenser according to the present invention.

  As in the second embodiment, the present embodiment supports the tube bundle 31 that constitutes the heat transfer tubes 27 as a group by the inlet side tube plate 28 and the outlet side tube plate 29, and a plurality of, for example, two divided inlet side tube plates 28. Among the outlet side tube plates 29, the fitting ribs 37a and 37b are provided on the divided surfaces 33c and 33d on one side surface of the tube plate, and the reinforcing member 40 is provided on the other side surface of the divided tube plate. Note that the fitting ribs 37a and 37b and the reinforcing member 40 may be provided only on one side surface of the divided tube sheet.

  As described above, in the present embodiment, the fitting ribs 37a and 37b are provided on the dividing surfaces 33c and 33d of the tube plates 28 and 29, and the fitting ribs 37a and 37b provided on the dividing surfaces 33c and 33d are manufactured in the factory. After mounting, the reinforcing members 40 are provided on the divided surfaces 33c and 33d of the tube plates 28 and 29 at the time of assembly at the site, so that the deformation of the tube plates 28 and 29 at the time of assembly and operation at the site. Can be prevented.

  FIG. 10 and FIG. 11 are conceptual diagrams showing a fifth embodiment of the condenser and the condenser assembling method according to the present invention.

  In the present embodiment, as shown in FIG. 10, a plate-like support plate 30 that supports a tube bundle 31 that constitutes a heat transfer tube 27 as a group is divided into a plurality of, for example, two in the center along the axial direction, and the upper half support is provided. It is divided into a plate 30a and a lower half support plate 30b, and a wedge 41 is inserted between the divided upper and lower support plates 30a and 30b.

  As shown in FIG. 11, the wedge 41 has a shape having a triangular slope 42 and is inserted into the divided surfaces 33e and 33f.

  As described above, in this embodiment, the support plate 30 that supports the tube bundle 31 is divided at the center, and the wedges 41 are provided on the divided surfaces 33e and 33f of the divided upper and lower half support plates 30a and 30b. After being manufactured in the above, since it is configured to be welded after being inserted into the divided surfaces 33e and 33f of the upper and lower half support plates 30a and 30b at the site, the gap between the tube bundle 31 and the support plate 30 is adjusted at the time of assembly at the site. Therefore, the assembly process can be further shortened, and the labor of the worker can be further reduced.

The whole face assembly drawing which shows the condenser which concerns on this invention. The conceptual diagram which shows 1st Embodiment of the condenser and the assembly method of a condenser which concern on this invention. The partial expansion perspective view extracted from the "A" part of FIG. The partial expansion perspective view extracted from the "B" part of FIG. The conceptual diagram which shows 2nd Embodiment of the condenser and the assembly method of a condenser which concern on this invention. The partial expansion perspective view extracted from the "C" part of FIG. The conceptual diagram which shows 3rd Embodiment of the condenser and the assembly method of a condenser which concern on this invention. Sectional drawing cut | disconnected and seen from the DD arrow direction of FIG. The conceptual diagram which shows 4th Embodiment of the condenser and the assembly method of a condenser which concern on this invention. The conceptual diagram which shows 5th Embodiment of the condenser and the assembly method of a condenser which concern on this invention. FIG. 11 is a partially enlarged perspective view extracted from the “E” portion of FIG. 10. The general assembly sectional view showing the conventional condenser. Sectional drawing cut | disconnected and cut | disconnected from the XX arrow direction of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steam turbine 2 Connection body part 3 Main body body part 4 Expansion passage 5 Inlet water chamber 6 Outlet water chamber 7 Outlet side tube plate 8 Outlet side tube plate 9 Heat transfer tube 10 Support plate 11 Tube bundle 12 Hot well 20 Steam turbine 21 Connection body Portion 22 Main body body 23 Expanding passage 24 Feed heater 25 Inlet water chamber 26 Outlet water chamber 27 Heat transfer tube 28 Inlet side tube plate 29 Outlet side tube plate 30 Support plate 30a Upper half support plate 30b Lower half support plate 31 Tube bundle 32 Hot well 33a, 33b, 33c, 33d, 33e, 33f Dividing surface 34 Abutting plate 35a, 35b Flange 36 Fastener 37a, 37b Fitting rib 38a, 38b I-beam 40 Reinforcing member 41 Wedge 42 Slope

Claims (13)

In a condenser that accommodates a tube plate and a support plate that support a bundle of tubes configured as a group by combining a plurality of heat transfer tubes into a main body body part,
The tube sheet is divided , and a flange is provided on the side surface on the steam side for each of the divided tube sheets,
Causes welded connecting divided tubesheet together by welding the backing plate of the caul plate in the divided surface of the sea side of the side surface of the divided tube plate by abutment,
Condenser, characterized in that the arrangement for fastening connecting tube plates are divided by fastening the flanges together provided on the side surface of the steam side of the divided tube sheet in fasteners. Condenser according to claim 1, characterized in that a fitting rib to the divided tube sheet. Before Kisasae plate has been divided, the condenser according to claim 1, characterized in that a connecting member to the divided surfaces of the divided supporting plate. The condenser according to claim 4, wherein the connection member is a steel plate. The provided with a fitting ribs on the side surface of the sea side of the divided tube sheet condenser of claim 1, wherein the provision of the reinforcing member to the side of the vapor side of said split tube sheet. Before Kisasae plate has been divided among the fitting rib and reinforcing member only split surface of one side of the divided support plate, condensate according to claim 5, characterized in that a one Water container. Before Kisasae plate has been divided, the condenser according to claim 1, characterized in that the arrangement for inserting the wedge into split surfaces of the split bearing plate. Condenser which is characterized by applying to the power plant ones claim 1-7, wherein. Papermaking create a tubesheet and support plates for supporting the tube bundle be configured as a group together multiple heat transfer tubes in a single factory,
The tube sheet is divided before assembling with the support plate in the field, and a flange is provided on the side surface on the steam side for each of the divided tube sheets,
When assembling the said divided tube sheet and the support plate on site, divided by the the divided tube sheet sea side split face into contact plate side of the by contact welding the backing plate with the tube plates are connected by welding, characterized Rukoto the divided tube plates are then fastened connected by fastening the flanges together provided on the side surface of the steam side of the divided tube sheet by fasteners Condenser assembly method. The before and Symbol divided tube sheet and the support plate prior to assembly on site, condenser assembly method according to claim 9, characterized in providing a fitting rib on the divided tube sheet. The support plate is divided before assembling with the tube plate in the field,
After attaching the connecting member at the factory divided surfaces of the divided supporting plate,
The divided tube plate and the time of assembling the divided support plate on site, condenser assembly method according to claim 9, characterized in that to weld connecting the connecting member to each other. After attaching the fitting ribs dividing plane before Symbol divided tubesheet,
When assembling the before and Symbol divided tube sheet and the support plate on site, condenser assembly method according to claim 9, wherein the attachment of the reinforcing member to the tube plate. The support plate is divided before assembling with the tube plate in the field,
The divided when assembling the tube plate and the said divided support plate on site, condenser assembly method according to claim 9, characterized by inserting the wedge in the divided surface of the support plate.

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