JP5871843B2 - Heat exchanger - Google Patents

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JP5871843B2
JP5871843B2 JP2013042971A JP2013042971A JP5871843B2 JP 5871843 B2 JP5871843 B2 JP 5871843B2 JP 2013042971 A JP2013042971 A JP 2013042971A JP 2013042971 A JP2013042971 A JP 2013042971A JP 5871843 B2 JP5871843 B2 JP 5871843B2
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tube
support plate
support
plate
heat transfer
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JP2014169840A (en
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英之 森田
英之 森田
近藤 喜之
喜之 近藤
信哉 小雲
信哉 小雲
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Mitsubishi Heavy Industries Ltd
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Description

本発明は、多数の伝熱管の振動を抑制可能とする熱交換器に関するものである。   The present invention relates to a heat exchanger that can suppress vibrations of a large number of heat transfer tubes.

例えば、熱交換器は、中空形状をなす胴部内に複数の伝熱管が配設され、この各伝熱管は、上下端部が管板にそれぞれ支持され、中間部が複数の管支持板に支持されている。そして、胴部は、上端部及び下端部に二次媒体の入口側ヘッダ及び出口側ヘッダが設けられ、各伝熱管が連通している。また、胴部は、一次媒体の入口部及び出口部が形成されている。   For example, in a heat exchanger, a plurality of heat transfer tubes are disposed in a hollow body, and each heat transfer tube is supported at its upper and lower ends by a tube plate, and an intermediate portion is supported by a plurality of tube support plates. Has been. And the trunk | drum is provided with the inlet side header and outlet side header of the secondary medium in the upper end part and the lower end part, and each heat exchanger tube is connecting. Further, the trunk portion is formed with an inlet portion and an outlet portion of the primary medium.

従って、一次媒体が入口側ヘッダを通して複数の伝熱管に供給される一方、入口部からこの胴部内に二次媒体が供給される。すると、複数の伝熱管内を流れる一次媒体と胴部内を循環する二次媒体との間で熱交換が行われることで、二次媒体が一次媒体の熱を吸収し、例えば、蒸気が生成される。そして、生成された蒸気が出口部から排出される一方、温度低下した一次媒体が出口側ヘッダから排出される。   Therefore, the primary medium is supplied to the plurality of heat transfer tubes through the inlet header, while the secondary medium is supplied from the inlet portion into the barrel portion. Then, heat exchange is performed between the primary medium that flows in the plurality of heat transfer tubes and the secondary medium that circulates in the body, so that the secondary medium absorbs the heat of the primary medium, for example, steam is generated. The And the produced | generated vapor | steam is discharged | emitted from an exit part, while the primary medium in which the temperature fell is discharged | emitted from an exit side header.

このように構成された熱交換器としては、例えば、下記特許文献1に記載されたものがある。   An example of the heat exchanger configured as described above is described in Patent Document 1 below.

特開2012−145284号公報JP 2012-145284 A

上述した熱交換器を組み立てるとき、まず、貫通孔が形成された管板と貫通孔が形成された複数の管支持板を胴部の内側に固定し、次に、複数の伝熱管を管支持板の各貫通孔に挿入すると共に、端部を管板に挿入して固定している。そのため、伝熱管の挿入性を確保するために、管支持板の貫通孔と伝熱管との間に所定の隙間が確保されている。また、熱交換器にて、二次媒体は、入口部から胴部内に供給され、この胴部内を上昇するときに各伝熱管を流れる一次媒体と熱交換を行うことで加熱されて蒸気となり、出口部から排出される。この二次媒体は、胴部内を上昇するとき、管支持板の貫通孔と伝熱管との間や別途管支持板に設けられたフロー孔を通って上昇する。   When assembling the heat exchanger described above, first, a tube plate with through holes and a plurality of tube support plates with through holes are fixed to the inside of the body, and then a plurality of heat transfer tubes are tube supported. While inserting into each through-hole of a board, the edge part is inserted and fixed to a tube board. Therefore, in order to ensure the insertability of the heat transfer tube, a predetermined gap is secured between the through hole of the tube support plate and the heat transfer tube. Further, in the heat exchanger, the secondary medium is supplied from the inlet portion into the body portion, and when heated in the body portion, heat is exchanged with the primary medium flowing through each heat transfer tube to become steam, It is discharged from the outlet. When the secondary medium ascends in the body portion, the secondary medium ascends between the through hole of the tube support plate and the heat transfer tube or through a flow hole separately provided in the tube support plate.

一方で、各伝熱管は、内部に一次媒体が流動し、外部に二次媒体が流動しており、各媒体により振動が発生しやすい。しかし、各伝熱管は、管支持板の貫通孔に所定の隙間をもって支持されていることから、製作精度や流動の乱れなどによっては、伝熱管の振動を適正に抑制できないおそれがある。また、各伝熱管は、振動により、外周面が管支持板における貫通孔の内周面に衝突を繰り返すことから磨耗による減肉が発生するおそれがある。   On the other hand, in each heat transfer tube, the primary medium flows inside and the secondary medium flows outside, and vibration is likely to be generated by each medium. However, since each heat transfer tube is supported in the through hole of the tube support plate with a predetermined gap, there is a possibility that vibration of the heat transfer tube cannot be suppressed properly depending on manufacturing accuracy, flow disturbance, and the like. In addition, each heat transfer tube may be subject to thinning due to wear because the outer peripheral surface repeatedly collides with the inner peripheral surface of the through hole in the tube support plate due to vibration.

本発明は、上述した課題を解決するものであり、伝熱管の振動を適正に抑制する一方で伝熱管の損傷を抑制可能とする熱交換器を提供することを目的とする。   This invention solves the subject mentioned above, and it aims at providing the heat exchanger which can suppress damage to a heat exchanger tube, while suppressing the vibration of a heat exchanger tube appropriately.

上記の目的を達成するための本発明の熱交換器は、中空形状をなす胴部と、前記胴部内に固定されて複数の取付孔が形成される管板と、複数の第1支持孔が所定間隔で形成されて前記胴部内に前記管板と所定間隔をもって配置される第1管支持板と、複数の第2支持孔が所定間隔で形成されて前記胴部内に前記管板及び前記第1管支持板と所定間隔をもって配置されると共に前記第1管支持板と異なる熱膨張率熱膨張率の材料により構成される第2管支持板と、端部が前記取付孔に固定されて中間部が前記第1支持孔及び前記第2支持孔に挿通して支持される複数の伝熱管と、を有することを特徴とするものである。   In order to achieve the above object, a heat exchanger according to the present invention includes a hollow body portion, a tube plate fixed in the body portion to form a plurality of mounting holes, and a plurality of first support holes. A first tube support plate formed at a predetermined interval and disposed at a predetermined interval from the tube plate in the body portion, and a plurality of second support holes are formed at a predetermined interval to form the tube plate and the second tube in the body portion. A second tube support plate which is arranged with a predetermined interval from the one tube support plate and is made of a material having a different thermal expansion coefficient from that of the first tube support plate; and an end portion fixed to the mounting hole and intermediate The portion includes a plurality of heat transfer tubes that are inserted through and supported by the first support hole and the second support hole.

従って、一次媒体が胴部から複数の伝熱管に供給される一方、二次媒体が胴部内に供給されると、複数の伝熱管内を流れる一次媒体と胴部内を循環する二次媒体との間で熱交換が行われることで、二次媒体が一次媒体の熱を吸収して加熱される。このとき、第2管支持板が第1管支持板と異なる熱膨張率熱膨張率の材料により構成されていることから、第1管支持板と第2管支持板の熱延び量が相違する。そのため、第1管支持板の各第1支持孔と第2管支持板の各第2支持孔の位置が径方向にずれ、径方向にずれた第1、第2各支持孔の内面により伝熱管の外面が径方向に押圧されることとなり、伝熱管の振動を適正に抑制することができる一方で、支持孔と伝熱管との間の磨耗を抑制して伝熱管の損傷を抑制することができる。   Accordingly, when the primary medium is supplied from the body portion to the plurality of heat transfer tubes, and the secondary medium is supplied into the body portion, the primary medium flowing in the plurality of heat transfer tubes and the secondary medium circulating in the body portion are By performing heat exchange between the secondary media, the secondary medium absorbs the heat of the primary medium and is heated. At this time, since the second tube support plate is made of a material having a coefficient of thermal expansion different from that of the first tube support plate, the amount of heat extension between the first tube support plate and the second tube support plate is different. . Therefore, the positions of the first support holes of the first tube support plate and the second support holes of the second tube support plate are shifted in the radial direction, and are transmitted by the inner surfaces of the first and second support holes that are shifted in the radial direction. While the outer surface of the heat tube is pressed in the radial direction, vibration of the heat transfer tube can be appropriately suppressed, while the wear between the support hole and the heat transfer tube is suppressed to suppress damage to the heat transfer tube. Can do.

本発明の熱交換器では、前記第1管支持板と前記第2管支持板とが所定間隔で交互に配置されることを特徴としている。   The heat exchanger according to the present invention is characterized in that the first tube support plate and the second tube support plate are alternately arranged at a predetermined interval.

従って、第1管支持板と第2管支持板が交互に配置されていることから、第1管支持板と第2管支持板が熱延びして第1支持孔と第2支持孔の位置が径方向にずれたとき、伝熱管は、長手方向における異なる位置が異なる方向から押圧されることとなり、伝熱管を効率的に支持することができる。   Accordingly, since the first tube support plate and the second tube support plate are alternately arranged, the first tube support plate and the second tube support plate are heated to extend to the positions of the first support hole and the second support hole. When the is shifted in the radial direction, the heat transfer tube is pressed from different directions at different positions in the longitudinal direction, and can efficiently support the heat transfer tube.

本発明の熱交換器では、高い熱膨張率の材料により構成される前記第1管支持板または前記第2管支持板は、常温時に前記第2支持孔の中央部の近傍に前記伝熱管が配置され、高温時に前記第1支持孔または前記第2支持孔の内面が前記伝熱管に接触する接触力が大きくなるように熱膨張することを特徴としている。   In the heat exchanger of the present invention, the first tube support plate or the second tube support plate made of a material having a high coefficient of thermal expansion has the heat transfer tube in the vicinity of the center portion of the second support hole at room temperature. It is arrange | positioned and it thermally expands so that the contact force which the inner surface of the said 1st support hole or the said 2nd support hole may contact the said heat exchanger tube may become large at high temperature.

従って、高い熱膨張率の材料により構成される管支持板は、常温時に支持孔の中央部の近傍に伝熱管が配置されることから、管支持板に対する伝熱管の組付を容易に行うことができ、一方、高温時に支持孔の内面がより強く伝熱管に接触するように熱膨張することから、伝熱管を適正に拘束して支持することができる。   Therefore, the tube support plate made of a material having a high coefficient of thermal expansion has a heat transfer tube arranged near the center of the support hole at room temperature, so that the heat transfer tube can be easily assembled to the tube support plate. On the other hand, at the time of high temperature, the inner surface of the support hole is thermally expanded so as to be more strongly in contact with the heat transfer tube, so that the heat transfer tube can be appropriately restrained and supported.

本発明の熱交換器では、前記第2管支持板は、前記胴部に対して径方向に相対移動自在に支持されることを特徴としている。   In the heat exchanger according to the present invention, the second tube support plate is supported so as to be relatively movable in the radial direction with respect to the body portion.

従って、第2管支持板が胴部に対して径方向に相対移動できることから、第2管支持板が径方向に適正に熱延びすることができ、胴部に圧縮応力などを与えることがない。   Accordingly, since the second tube support plate can move in the radial direction relative to the body portion, the second tube support plate can be appropriately heat-expanded in the radial direction, and no compression stress or the like is given to the body portion. .

本発明の熱交換器では、前記複数の第2支持孔は、前記第2管支持板における径方向の外側に配置される前記第2支持孔ほど径方向の長さが長く形成されることを特徴としている。   In the heat exchanger according to the present invention, the plurality of second support holes are formed such that the second support holes arranged on the outer side in the radial direction of the second tube support plate are longer in the radial direction. It is a feature.

従って、第2管支持板が熱延びするとき、中心部に比べて外周部側の熱延び量が大きくなるが、第2支持孔は、第2管支持板における外側ほど径方向の長さが長く形成されることから、各第2支持孔は、各伝熱管に対してほぼ同等な圧力で押圧して支持することができ、伝熱管の損傷を抑制することができる。   Therefore, when the second pipe support plate is hot-extended, the amount of heat extension on the outer peripheral side is larger than that of the center part, but the second support hole has a radial length toward the outer side of the second pipe support plate. Since it forms long, each 2nd support hole can be pressed and supported with the substantially equivalent pressure with respect to each heat exchanger tube, and can suppress damage to a heat exchanger tube.

本発明の熱交換器では、前記複数の伝熱管が鉛直方向に沿って配置されることを特徴としている。   The heat exchanger according to the present invention is characterized in that the plurality of heat transfer tubes are arranged along a vertical direction.

従って、複数の伝熱管が胴部内に鉛直方向に沿って配置されることから、第1、第2管支持板が水平方向に熱延びすることとなり、第1、第2支持孔が各伝熱管に対してほぼ均一な圧力で押圧することができ、第1、第2管支持板により伝熱管を適正に支持することができる。   Accordingly, since the plurality of heat transfer tubes are arranged in the body portion along the vertical direction, the first and second tube support plates extend in the horizontal direction, and the first and second support holes correspond to the heat transfer tubes. The heat transfer tube can be appropriately supported by the first and second tube support plates.

本発明の熱交換器によれば、管板と第1管支持板と第2管支持板を胴部内に所定間隔で配置し、複数の伝熱管の端部を管板の取付孔に固定し、中間部を各管支持板の支持孔にそれぞれ挿通して支持し、第2管支持板を第1管支持板よりも高い熱膨張率の材料により構成するので、伝熱管の振動を適正に抑制することができる一方で、支持孔と伝熱管との間の磨耗を抑制して伝熱管の損傷を抑制することができる。   According to the heat exchanger of the present invention, the tube plate, the first tube support plate, and the second tube support plate are arranged at predetermined intervals in the body portion, and the end portions of the plurality of heat transfer tubes are fixed to the mounting holes of the tube plate. The intermediate portion is inserted and supported through the support hole of each tube support plate, and the second tube support plate is made of a material having a higher coefficient of thermal expansion than the first tube support plate, so that the vibration of the heat transfer tube can be properly controlled. On the other hand, it is possible to suppress wear between the support hole and the heat transfer tube, thereby suppressing damage to the heat transfer tube.

図1は、本発明の一実施例に係る熱交換器を表す縦断面図である。FIG. 1 is a longitudinal sectional view showing a heat exchanger according to an embodiment of the present invention. 図2は、本実施例の熱交換器を表す横断面図である。FIG. 2 is a cross-sectional view showing the heat exchanger of the present embodiment. 図3は、管支持板の支持構造を表す概略図である。FIG. 3 is a schematic diagram showing a support structure of the tube support plate. 図4は、別の管支持板の支持構造を表す概略図である。FIG. 4 is a schematic view showing another tube support plate support structure. 図5は、伝熱管と管支持板との関係を表す概略図である。FIG. 5 is a schematic diagram showing the relationship between the heat transfer tube and the tube support plate. 図6は、稼動時における伝熱管と管支持板との関係を表す概略図である。FIG. 6 is a schematic view showing the relationship between the heat transfer tube and the tube support plate during operation. 図7は、伝熱管に対する第2管支持板の熱変形を表す概略図である。FIG. 7 is a schematic diagram illustrating thermal deformation of the second tube support plate with respect to the heat transfer tube. 図8は、伝熱管に対する第1管支持板の熱変形を表す概略図である。FIG. 8 is a schematic diagram illustrating thermal deformation of the first tube support plate with respect to the heat transfer tube. 図9は、第2管支持板の変形例を表す概略図である。FIG. 9 is a schematic diagram illustrating a modification of the second tube support plate. 図10は、伝熱管に対する第2管支持板の熱変形を表す概略図である。FIG. 10 is a schematic diagram illustrating thermal deformation of the second tube support plate with respect to the heat transfer tube.

以下に添付図面を参照して、本発明に係る熱交換器の好適な実施例を詳細に説明する。なお、この実施例により本発明が限定されるものではなく、また、実施例が複数ある場合には、各実施例を組み合わせて構成するものも含むものである。   Exemplary embodiments of a heat exchanger according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

図1は、本発明の一実施例に係る熱交換器を表す縦断面図、図2は、本実施例の熱交換器を表す横断面図、図3は、管支持板の支持構造を表す概略図、図4は、別の管支持板の支持構造を表す概略図、図5は、伝熱管と管支持板との関係を表す概略図、図6は、稼動時における伝熱管と管支持板との関係を表す概略図、図7は、伝熱管に対する第2管支持板の熱変形を表す概略図、図8は、伝熱管に対する第1管支持板の熱変形を表す概略図である。   FIG. 1 is a longitudinal sectional view showing a heat exchanger according to one embodiment of the present invention, FIG. 2 is a transverse sectional view showing the heat exchanger of the present embodiment, and FIG. 3 shows a support structure for a tube support plate. FIG. 4 is a schematic diagram showing a support structure of another tube support plate, FIG. 5 is a schematic diagram showing the relationship between the heat transfer tube and the tube support plate, and FIG. 6 is a heat transfer tube and tube support during operation. FIG. 7 is a schematic diagram illustrating thermal deformation of the second tube support plate with respect to the heat transfer tube, and FIG. 8 is a schematic diagram illustrating thermal deformation of the first tube support plate with respect to the heat transfer tube. .

本実施例の熱交換器において、図1及び図2に示すように、胴部11は、密閉された中空円筒形状をなし、鉛直方向に沿って配置されている。この胴部11は、下部の内側に円板形状をなす下部管板12が水平をなして配置され、外周部が溶接により固定されることで、下部ヘッダ13が形成されている。また、胴部11は、上部の内側に円板形状をなす上部管板14が水平をなして配置され、外周部が溶接により固定されることで、上部ヘッダ15が形成されている。   In the heat exchanger of the present embodiment, as shown in FIGS. 1 and 2, the body portion 11 has a hermetically sealed hollow cylindrical shape and is arranged along the vertical direction. The body portion 11 has a lower tube plate 12 having a disk shape arranged horizontally inside a lower portion, and a lower header 13 is formed by fixing an outer peripheral portion by welding. Further, the upper portion 15 of the body portion 11 is formed such that a disk-shaped upper tube plate 14 is horizontally arranged inside the upper portion, and the outer peripheral portion is fixed by welding.

また、胴部11は、下部管板12と上部管板14との間に、1個の第1管支持板16と2個の第2管支持板17,18が交互に配置されている。即ち、胴部11は、内部に下から、下部管板12、第2管支持板17、第1管支持板16、第2管支持板18、上部管板14の順に配置され、その間隔はほぼ同様の間隔となっている。なお、ここでは、管支持板16,17,18を3個としたが、その数に限定されるものではない。   In the body portion 11, one first tube support plate 16 and two second tube support plates 17 and 18 are alternately arranged between the lower tube plate 12 and the upper tube plate 14. That is, the body portion 11 is arranged from the bottom in the order of the lower tube plate 12, the second tube support plate 17, the first tube support plate 16, the second tube support plate 18, and the upper tube plate 14, and the interval is as follows. The intervals are almost the same. Here, the number of the tube support plates 16, 17, and 18 is three, but the number is not limited.

下部管板12は、複数の取付孔21が形成され、上部管板14は、複数の取付孔22が形成されている。第1管支持板16は、複数の第1支持孔23が形成され、各第2管支持板17,18は、複数の第2支持孔24,25が形成されている。この場合、下部管板12の各取付孔21、上部管板14の各取付孔22、第1管支持板16の各第1支持孔23、各第2管支持板17,18の各第2支持孔24,25は、ほぼ同位置に同数形成され、中心Oを支点として千鳥状に配置されている。なお、各取付孔21,22及び各支持孔23,24,25は、千鳥状配置に限定されるものではなく、格子状に配置してもよく、ランダムに配置してもよい。   The lower tube sheet 12 is formed with a plurality of mounting holes 21, and the upper tube sheet 14 is formed with a plurality of mounting holes 22. The first tube support plate 16 has a plurality of first support holes 23, and the second tube support plates 17 and 18 have a plurality of second support holes 24 and 25. In this case, each mounting hole 21 of the lower tube plate 12, each mounting hole 22 of the upper tube plate 14, each first support hole 23 of the first tube support plate 16, and each second of each second tube support plate 17,18. The same number of support holes 24 and 25 are formed at substantially the same position, and are arranged in a staggered manner with the center O as a fulcrum. The mounting holes 21 and 22 and the support holes 23, 24, and 25 are not limited to the staggered arrangement, and may be arranged in a lattice pattern or randomly.

複数の伝熱管31は、下端部がそれぞれ下部管板12の各取付孔21に嵌入し、溶接により固定され、上端部がそれぞれ上部管板14の各取付孔22に嵌入し、溶接により固定されている。また、複数の伝熱管31は、中間部がそれぞれ第1管支持板16の各第1支持孔23及び各第2管支持板17,18の各第2支持孔24,25に挿通されて支持されている。即ち、上部ヘッダ15と下部ヘッダ13は、複数の伝熱管31により連通されている。   The plurality of heat transfer tubes 31 each have a lower end portion fitted into each mounting hole 21 of the lower tube plate 12 and fixed by welding, and an upper end portion fitted into each mounting hole 22 of the upper tube plate 14 and fixed by welding. ing. Further, the plurality of heat transfer tubes 31 are supported by the intermediate portions being inserted through the first support holes 23 of the first tube support plate 16 and the second support holes 24 and 25 of the second tube support plates 17 and 18, respectively. Has been. That is, the upper header 15 and the lower header 13 are communicated by a plurality of heat transfer tubes 31.

そして、胴部11は、下部ヘッダ13の下部に一次熱媒体の供給口32が形成される一方、上部ヘッダ15の上部に熱交換して冷却された一次熱媒体の排出口33が形成されている。また、胴部11は、側部に二次熱媒体の供給口34が形成される一方、側部であって供給口34より上方に排出口35が形成されている。   The trunk portion 11 has a primary heat medium supply port 32 formed in the lower portion of the lower header 13, and a primary heat medium discharge port 33 cooled by heat exchange in the upper portion of the upper header 15. Yes. The body portion 11 has a supply port 34 for the secondary heat medium formed on the side portion, and a discharge port 35 formed on the side portion and above the supply port 34.

従って、一次熱媒体(例えば、蒸気)が供給口32から下部ヘッダ13に供給されて複数の伝熱管31に送られて上昇する一方、二次熱媒体が供給口34から胴部31内に供給される。このとき、各伝熱管31内を上昇する一次熱媒体と胴部31内を流れる二次熱媒体との間で熱交換が行われる。即ち、胴部11に供給された二次熱媒体が伝熱管31を流れる一次熱媒体により加熱されて蒸気となる。そして、冷却された一次熱媒体は、各伝熱管31から上部ヘッダ15に流れて排出口33から排出される一方、加熱された二次熱媒体は、排出口35から排出される。   Accordingly, a primary heat medium (for example, steam) is supplied from the supply port 32 to the lower header 13 and sent to the plurality of heat transfer tubes 31 to rise, while a secondary heat medium is supplied from the supply port 34 into the trunk portion 31. Is done. At this time, heat exchange is performed between the primary heat medium rising in each heat transfer tube 31 and the secondary heat medium flowing in the body portion 31. That is, the secondary heat medium supplied to the body 11 is heated by the primary heat medium flowing through the heat transfer tube 31 to become steam. Then, the cooled primary heat medium flows from each heat transfer tube 31 to the upper header 15 and is discharged from the discharge port 33, while the heated secondary heat medium is discharged from the discharge port 35.

このように構成された熱交換器にて、複数の伝熱管31は、1個の第1管支持板16と2個の第2管支持板17,18に支持されており、この場合、各第2管支持板17,18は、第1管支持板16よりも高い熱膨張率(熱膨張係数)の材料により構成されている。即ち、第1管支持板16と第2管支持板17,18は、異なる熱膨張率の材料により構成されている。   In the heat exchanger configured as described above, the plurality of heat transfer tubes 31 are supported by one first tube support plate 16 and two second tube support plates 17, 18. The second tube support plates 17 and 18 are made of a material having a higher thermal expansion coefficient (thermal expansion coefficient) than that of the first tube support plate 16. That is, the first tube support plate 16 and the second tube support plates 17 and 18 are made of materials having different thermal expansion coefficients.

伝熱管31は、第1管支持板16の支持孔23と、第2管支持板17,18の支持孔24,25に所定隙間をもって挿通されて支持されている。この場合、熱交換器の常温時、少なくとも、第2支持孔24,25の中央部の近傍に伝熱管31が配置され、第2支持孔24,25の内面が伝熱管31の外面に接触しないように位置している。一方、熱交換器の高温時、第2管支持板17,18が熱膨張することで、少なくとも、第2支持孔24,25の中央部からずれて伝熱管31が配置され、第2支持孔24,25の内面が伝熱管31の外面に接触するように位置している。なお、伝熱管31は、第1管支持板16の支持孔23と、第2管支持板17,18の支持孔24,25に弱い接触状態で挿通されて支持されていてもよい。   The heat transfer tube 31 is inserted into and supported by a support hole 23 of the first tube support plate 16 and support holes 24 and 25 of the second tube support plates 17 and 18 with a predetermined gap. In this case, at the normal temperature of the heat exchanger, the heat transfer tube 31 is disposed at least near the center of the second support holes 24 and 25, and the inner surfaces of the second support holes 24 and 25 do not contact the outer surface of the heat transfer tube 31. Is located. On the other hand, at the time of high temperature of the heat exchanger, the second tube support plates 17 and 18 are thermally expanded, so that the heat transfer tubes 31 are disposed at least shifted from the central portions of the second support holes 24 and 25, and the second support holes The inner surfaces of 24 and 25 are positioned so as to contact the outer surface of the heat transfer tube 31. The heat transfer tube 31 may be inserted and supported in a weak contact state with the support hole 23 of the first tube support plate 16 and the support holes 24 and 25 of the second tube support plates 17 and 18.

具体的には、第1管支持板16を高クロム鋼(9クロム鋼)とし、第2管支持板17,18を低クロム鋼(2.25クロム鋼)としたり、第1管支持板16をニッケル基合金とし、第2管支持板17,18をステンレス鋼としたりすればよいものである。   Specifically, the first tube support plate 16 is made of high chrome steel (9 chrome steel), and the second tube support plates 17 and 18 are made of low chrome steel (2.25 chrome steel). May be a nickel base alloy and the second tube support plates 17 and 18 may be stainless steel.

また、第1管支持板16及び各第2管支持板17,18は、胴部11に対して径方向に移動自在に支持されている。即ち、図3に示すように、胴部11は、側壁11aの内面に下部フランジ41が固定されている。第2管支持板17,18は、外周下部がこの下部フランジ41の上に載置されている。また、胴部11は、側壁11aの内面で下部フランジ41の上方に対向して、第2管支持板17,18の外周上部を押えるように上部フランジ42が固定されている。   The first tube support plate 16 and the second tube support plates 17 and 18 are supported so as to be movable in the radial direction with respect to the body portion 11. That is, as shown in FIG. 3, the lower flange 41 is fixed to the inner surface of the side wall 11a. The second pipe support plates 17 and 18 are placed on the lower flange 41 at the lower outer periphery. Moreover, the upper flange 42 is fixed so that the trunk | drum 11 may oppose the upper direction of the lower flange 41 on the inner surface of the side wall 11a, and may press the outer peripheral upper part of the 2nd pipe | tube support plates 17 and 18.

そして、胴部11は、内径が第2管支持板17,18の外径より大きく設定され、胴部11の内面と第2管支持板17,18の外面との間に隙間Sが確保されている。また、第2管支持板17,18は、下部フランジ41及び上部フランジ42により固定されずに挟持されている。そのため、第2管支持板17,18は、胴部11の径方向に移動することができる。即ち、第2管支持板17,18は、隙間Sだけ径方向への熱延びが許容されている。   The body portion 11 is set to have an inner diameter larger than the outer diameter of the second tube support plates 17 and 18, and a clearance S is secured between the inner surface of the body portion 11 and the outer surfaces of the second tube support plates 17 and 18. ing. The second pipe support plates 17 and 18 are sandwiched without being fixed by the lower flange 41 and the upper flange 42. Therefore, the second tube support plates 17 and 18 can move in the radial direction of the body portion 11. That is, the second tube support plates 17 and 18 are allowed to extend in the radial direction by the gap S.

なお、ここでは、第2管支持板17,18の支持構造についてのみ説明したが、第1管支持板16も第2管支持板17,18と同様に上下のフランジに挟持され、所定の隙間Sだけ径方向への熱延びが許容されている。   Here, only the support structure of the second tube support plates 17 and 18 has been described, but the first tube support plate 16 is also sandwiched between the upper and lower flanges in the same manner as the second tube support plates 17 and 18 and has a predetermined gap. S is allowed to extend in the radial direction by S.

また、第2管支持板17,18の支持構造は、上述した構成に限定されるものではない。例えば、図4に示すように、下部管板12から連結部51により第1タイロッド52を上方に延出し、第2管支持板17の貫通孔17aを貫通した後、端部を第1管支持板16に連結部53を介して連結する。また、下部管板12から連結部54により第2タイロッド55を上方に延出し、第2管支持板17に連結部56を介して連結した後、更に上方に延出し、第1管支持板16の貫通孔16aを貫通した後、端部を第2管支持板18に連結する。   Moreover, the support structure of the 2nd pipe | tube support plates 17 and 18 is not limited to the structure mentioned above. For example, as shown in FIG. 4, the first tie rod 52 extends upward from the lower tube plate 12 by the connecting portion 51, passes through the through hole 17 a of the second tube support plate 17, and then the end portion is supported by the first tube. It connects with the board 16 via the connection part 53. FIG. Further, the second tie rod 55 extends upward from the lower tube plate 12 by the connecting portion 54, and is connected to the second tube support plate 17 via the connecting portion 56, and then extends further upward, and the first tube support plate 16. After passing through the through hole 16 a, the end is connected to the second tube support plate 18.

そして、胴部11は、内径が第2管支持板17,18の外径より大きく設定され、胴部11の内面と第2管支持板17,18の外面との間に隙間が確保されている。そのため、第1管支持板16は、第1タイロッド52を介して下部管板12に支持され、第2管支持板17,18は、第2タイロッド55を介して下部管板12に支持されている。つまり、第1管支持板16と第2管支持板17,18は、異なるタイロッド52,55により下部管板12に独立して支持されていることから、隙間だけ径方向への熱延びが許容されている。   The body 11 is set to have an inner diameter larger than the outer diameter of the second tube support plates 17 and 18, and a gap is secured between the inner surface of the body 11 and the outer surfaces of the second tube support plates 17 and 18. Yes. Therefore, the first tube support plate 16 is supported by the lower tube plate 12 via the first tie rod 52, and the second tube support plates 17 and 18 are supported by the lower tube plate 12 via the second tie rod 55. Yes. That is, since the first tube support plate 16 and the second tube support plates 17 and 18 are independently supported by the lower tube plate 12 by different tie rods 52 and 55, it is allowed to extend in the radial direction by a gap. Has been.

このように構成された熱交換器にて、図5に示すように、胴部11内に各熱媒体が供給されていない常温時、伝熱管31は、第1支持孔23及び第2支持孔25(24)の中央部に位置し、第1支持孔23及び第2支持孔25(24)の内面に接触していない。そして、図6に示すように、胴部11内に各熱媒体が供給された高温時、第1管支持板16に対して第2管支持板18(17)が大きく熱膨張するため、伝熱管31は、第1支持孔23及び第2支持孔25(24)の中央部からそれぞれ逆方向にずれた位置となり、第1支持孔23及び第2支持孔25(24)の内面に接触する。   In the heat exchanger configured as described above, as shown in FIG. 5, the heat transfer tube 31 includes the first support hole 23 and the second support hole at normal temperature when each heat medium is not supplied into the body 11. It is located in the center part of 25 (24), and is not contacting the inner surface of the 1st support hole 23 and the 2nd support hole 25 (24). As shown in FIG. 6, the second tube support plate 18 (17) expands greatly with respect to the first tube support plate 16 at a high temperature when each heat medium is supplied into the body portion 11. The heat pipe 31 is in a position shifted in the opposite direction from the center of the first support hole 23 and the second support hole 25 (24), and contacts the inner surfaces of the first support hole 23 and the second support hole 25 (24). .

即ち、図7の左側に示すように、常温時、伝熱管31は、第2支持孔25(24)の中央部に位置し、第2支持孔25(24)の内面には接触していない。そして、図7の右側に示すように、高温時、第2管支持板18(17)が大きく熱膨張するため、第2支持孔25(24)が、図7にて右方へ移動し、第2支持孔25(24)の左側の内面が伝熱管31の右側の外面に当接して押圧する。このとき、伝熱管31は、第2支持孔25(24)により押圧方向(図7の右方)へ所定量だけ変形する。   That is, as shown on the left side of FIG. 7, at normal temperature, the heat transfer tube 31 is located at the center of the second support hole 25 (24) and is not in contact with the inner surface of the second support hole 25 (24). . Then, as shown on the right side of FIG. 7, the second tube support plate 18 (17) expands greatly at high temperatures, so the second support hole 25 (24) moves to the right in FIG. The inner surface on the left side of the second support hole 25 (24) contacts and presses the outer surface on the right side of the heat transfer tube 31. At this time, the heat transfer tube 31 is deformed by a predetermined amount in the pressing direction (rightward in FIG. 7) by the second support hole 25 (24).

一方、図8の左側に示すように、常温時、伝熱管31は、第1支持孔23の中央部に位置し、第1支持孔23の内面には接触していない。そして、図8の右側に示すように、高温時、第2管支持板18(17)が大きく熱膨張し、第2支持孔25(24)の内面が伝熱管31に当接して押圧することから、伝熱管31がこの押圧方向に所定量だけ変形している。しかし、第1管支持板16は大きく熱膨張しないため、第1支持孔23が、図8にて右方へはほとんど移動せず、第1支持孔23の右側の内面が伝熱管31の左側の外面に当接する。   On the other hand, as shown on the left side of FIG. 8, at normal temperature, the heat transfer tube 31 is located at the center of the first support hole 23 and is not in contact with the inner surface of the first support hole 23. Then, as shown on the right side of FIG. 8, when the temperature is high, the second tube support plate 18 (17) expands greatly, and the inner surface of the second support hole 25 (24) abuts against and heats the heat transfer tube 31. Therefore, the heat transfer tube 31 is deformed by a predetermined amount in the pressing direction. However, since the first tube support plate 16 does not thermally expand greatly, the first support hole 23 hardly moves rightward in FIG. 8, and the inner surface on the right side of the first support hole 23 is on the left side of the heat transfer tube 31. Abuts against the outer surface of

そのため、図6に示すように、伝熱管31は、高温時、第2管支持板18(17)の第2支持孔25(24)により図6にて右方へ押圧され、第1管支持板16の第1支持孔23により図6にて左方へ押圧されることとなり、がたつきなく適正に支持されることとなる。   Therefore, as shown in FIG. 6, the heat transfer tube 31 is pressed to the right in FIG. 6 by the second support hole 25 (24) of the second tube support plate 18 (17) at a high temperature to support the first tube. It will be pressed to the left in FIG. 6 by the first support hole 23 of the plate 16, and will be supported properly without rattling.

また、本実施例にて、第1管支持板16及び各第2管支持板17,18は、円板形状をなし、各支持孔23,24,25は、中心Oを支点として千鳥状に配置されている。そのため、特に、第2管支持板17,18は、中心部側に比べて外周部側の熱延び量が大きい。そのため、複数の第2支持孔24,25にて、第2管支持板17,18における径方向の外側に配置される第2支持孔ほど径方向の長さを長く形成するとよい。   In the present embodiment, the first tube support plate 16 and the second tube support plates 17 and 18 have a disk shape, and the support holes 23, 24, and 25 are staggered with the center O as a fulcrum. Has been placed. Therefore, in particular, the second pipe support plates 17 and 18 have a larger amount of thermal extension on the outer peripheral side than on the central side. For this reason, it is preferable that the plurality of second support holes 24 and 25 be formed such that the second support holes arranged on the radially outer side of the second tube support plates 17 and 18 have a longer radial length.

図9は、第2管支持板の変形例を表す概略図、図10は、伝熱管に対する第2管支持板の熱変形を表す概略図である。   FIG. 9 is a schematic diagram illustrating a modification of the second tube support plate, and FIG. 10 is a schematic diagram illustrating thermal deformation of the second tube support plate with respect to the heat transfer tube.

図9に示すように、第2管支持板61に真円で構成される複数の支持孔62,63が形成されており、中心Oに近い第2支持孔62の内径に対して、中心Oから遠い第2支持孔63の内径が大きく形成されている。そして、図10に示すように、高温時、第2管支持板61が大きく熱膨張するとき、中心Oに近い第2支持孔62より中心Oから遠い第2支持孔63の方が大きく熱延びする。ところが、第2支持孔62より第2支持孔63の内径が大きいことから、各第2支持孔62,63の内面が伝熱管31に適正に当接して押圧することとなる。そのため、伝熱管31は、第2管支持板61の各第2支持孔62,63により図10にて右方へ押圧され、がたつきなく適正に支持される。   As shown in FIG. 9, the second tube support plate 61 has a plurality of support holes 62 and 63 formed in a perfect circle, and the center O is closer to the inner diameter of the second support hole 62 near the center O. The inner diameter of the second support hole 63 far from the center is formed large. As shown in FIG. 10, when the second tube support plate 61 expands greatly at a high temperature, the second support hole 63 far from the center O has a larger thermal extension than the second support hole 62 close to the center O. To do. However, since the inner diameter of the second support hole 63 is larger than that of the second support hole 62, the inner surfaces of the second support holes 62 and 63 are pressed against the heat transfer tube 31 properly. Therefore, the heat transfer tube 31 is pressed rightward in FIG. 10 by the second support holes 62 and 63 of the second tube support plate 61 and is appropriately supported without rattling.

このように本実施例の熱交換器にあっては、胴部11内に固定されて複数の取付孔21,22が形成される管板12,14と、複数の第1支持孔23が所定間隔で形成されて胴部11内に管板12,14と所定間隔をもって配置される第1管支持板16と、複数の第2支持孔24,25が所定間隔で形成されて胴部11内に管板12,14及び第1管支持板16と所定間隔をもって配置されると共に第1管支持板16よりも高い熱膨張率の材料により構成される第2管支持板17,18と、端部が取付孔21,22に固定されて中間部が第1支持孔23及び第2支持孔24,25に挿通して支持される複数の伝熱管31を設けている。   As described above, in the heat exchanger according to the present embodiment, the tube plates 12 and 14 that are fixed in the body portion 11 to form the plurality of mounting holes 21 and 22 and the plurality of first support holes 23 are predetermined. A first tube support plate 16 that is formed at an interval and is arranged at a predetermined interval from the tube plates 12 and 14 in the body portion 11, and a plurality of second support holes 24 and 25 are formed at a predetermined interval to form an inside of the body portion 11. Second tube support plates 17 and 18 which are disposed at a predetermined distance from the tube plates 12 and 14 and the first tube support plate 16 and are made of a material having a higher thermal expansion coefficient than the first tube support plate 16, and ends. A plurality of heat transfer tubes 31 are provided in which the portion is fixed to the mounting holes 21 and 22 and the intermediate portion is inserted and supported through the first support hole 23 and the second support holes 24 and 25.

従って、一次熱媒体が胴部11から複数の伝熱管31に供給される一方、二次熱媒体が胴部11内に供給されると、複数の伝熱管31内を流れる一次熱媒体と胴部11内を循環する二次熱媒体との間で熱交換が行われることで、二次熱媒体が一次熱媒体の熱を吸収して加熱される。このとき、第2管支持板17,18が第1管支持板16よりも高い熱膨張率の材料により構成されていることから、この第2管支持板17,18は、第1管支持板16よりも熱延び量が大きい。そのため、第1管支持板16の各第1支持孔23と第2管支持板17,18の各第2支持孔24,25の位置が径方向にずれ、径方向にずれた第1、第2各支持孔23,24,25の内面により伝熱管31の外面が径方向に押圧されることとなり、伝熱管31の振動を適正に抑制することができる一方で、各支持孔23,24,25と伝熱管31との間の磨耗を抑制して伝熱管31の損傷を抑制することができる。   Accordingly, when the primary heat medium is supplied from the body portion 11 to the plurality of heat transfer tubes 31, while the secondary heat medium is supplied into the body portion 11, the primary heat medium and the body portions that flow through the plurality of heat transfer tubes 31. By performing heat exchange with the secondary heat medium circulating in 11, the secondary heat medium absorbs the heat of the primary heat medium and is heated. At this time, since the second tube support plates 17 and 18 are made of a material having a higher coefficient of thermal expansion than the first tube support plate 16, the second tube support plates 17 and 18 are the first tube support plates. The amount of hot elongation is greater than 16. Therefore, the positions of the first support holes 23 of the first tube support plate 16 and the second support holes 24 and 25 of the second tube support plates 17 and 18 are displaced in the radial direction, and the first and second displaced in the radial direction. 2 The outer surface of the heat transfer tube 31 is pressed in the radial direction by the inner surfaces of the support holes 23, 24, 25, and vibrations of the heat transfer tube 31 can be appropriately suppressed, while the support holes 23, 24, The wear between the heat transfer tube 31 and the heat transfer tube 31 can be suppressed, and damage to the heat transfer tube 31 can be suppressed.

本実施例の熱交換器では、第1管支持板16と第2管支持板17,18とが所定間隔で交互に配置されている。従って、第1管支持板16と第2管支持板17が熱延びして第1支持孔23と第2支持孔24,25の位置が径方向にずれたとき、伝熱管31は、長手方向における異なる位置が異なる方向から押圧されることとなり、伝熱管31を効率的に支持することができる。   In the heat exchanger of the present embodiment, the first tube support plates 16 and the second tube support plates 17 and 18 are alternately arranged at predetermined intervals. Therefore, when the first tube support plate 16 and the second tube support plate 17 are heated and the positions of the first support hole 23 and the second support holes 24 and 25 are displaced in the radial direction, the heat transfer tube 31 is moved in the longitudinal direction. Since the different positions in the are pressed from different directions, the heat transfer tube 31 can be efficiently supported.

本実施例の熱交換器では、第2管支持板17,18は、常温時に第2支持孔24,25の中央部に伝熱管31が配置され、高温時に第2支持孔24,25の内面が伝熱管31に接触するように熱膨張する。従って、第2管支持板17,18は、常温時に第2支持孔24,25の中央部の近傍に伝熱管が配置されることから、第2管支持板17,18に対する伝熱管31の組付を容易に行うことができ、一方、高温時に第2支持孔24,25の内面が伝熱管31により強く接触するように熱膨張することから、伝熱管31を適正に拘束して支持することができる。   In the heat exchanger of the present embodiment, the second pipe support plates 17 and 18 are arranged such that the heat transfer pipe 31 is disposed at the center of the second support holes 24 and 25 at normal temperature, and the inner surfaces of the second support holes 24 and 25 at high temperature. Expands so as to come into contact with the heat transfer tube 31. Accordingly, since the heat transfer tubes are arranged in the vicinity of the central portions of the second support holes 24 and 25 at the normal temperature, the second tube support plates 17 and 18 are a set of the heat transfer tubes 31 with respect to the second tube support plates 17 and 18. On the other hand, since the inner surface of the second support holes 24 and 25 is thermally expanded so as to come into stronger contact with the heat transfer tube 31 at a high temperature, the heat transfer tube 31 is appropriately restrained and supported. Can do.

本実施例の熱交換器では、第2管支持板17,18は、胴部11に対して径方向に相対移動自在に支持されている。従って、第2管支持板17,18が加熱されたとき、径方向に適正に熱延びすることができ、胴部11に圧縮応力などを与えることがない。   In the heat exchanger of the present embodiment, the second tube support plates 17 and 18 are supported so as to be relatively movable in the radial direction with respect to the trunk portion 11. Therefore, when the second tube support plates 17 and 18 are heated, the heat can be appropriately extended in the radial direction, and compressive stress or the like is not applied to the body portion 11.

本実施例の熱交換器では、複数の第2支持孔62,63は、第2管支持板61における径方向の外側に配置されるものほど径方向の長さが長く形成されている。従って、第2管支持板61が熱延びするとき、中心部に比べて外周部側の熱延び量が大きくなるが、中心側に位置する第2支持孔62より外周部に位置する第2支持孔63の方が、径方向の長さが長く形成されることから、各第2支持孔62,63は、各伝熱管31に対してほぼ同等な圧力で押圧して支持することができ、伝熱管31の損傷を抑制することができる。   In the heat exchanger of the present embodiment, the plurality of second support holes 62 and 63 are formed such that the radial length of the second support holes 62 and 63 is increased as the second support holes 62 and 63 are arranged on the outer side in the radial direction. Accordingly, when the second tube support plate 61 is hot-extended, the amount of heat extension on the outer peripheral portion side is larger than that on the central portion, but the second support located on the outer peripheral portion from the second support hole 62 located on the central side. Since the hole 63 is formed with a longer length in the radial direction, each of the second support holes 62 and 63 can be pressed against and supported by each heat transfer tube 31 with substantially the same pressure. Damage to the heat transfer tube 31 can be suppressed.

本実施例の熱交換器では、複数の伝熱管31を鉛直方向に沿って配置している。従って、第1、第2管支持板16,17,18が水平方向に熱延びすることとなり、第1、第2支持孔23,24,25が各伝熱管31に対してほぼ均一な圧力で押圧することができ、第1、第2管支持板16,17,18により伝熱管31を適正に支持することができる。   In the heat exchanger of the present embodiment, the plurality of heat transfer tubes 31 are arranged along the vertical direction. Therefore, the first and second tube support plates 16, 17, and 18 extend in the horizontal direction, and the first and second support holes 23, 24, and 25 are applied to the heat transfer tubes 31 at a substantially uniform pressure. The heat transfer tube 31 can be appropriately supported by the first and second tube support plates 16, 17, and 18.

なお、上述した実施例では、第2管支持板17,18を第1管支持板16よりも高い熱膨張率の材料により構成するものとしたが、第2管支持板17,18を第1管支持板16よりも低い熱膨張率の材料により構成してもよく、第1管支持板16と第2管支持板17,18との熱膨張率が相違すればよいものである。   In the above-described embodiment, the second tube support plates 17 and 18 are made of a material having a higher thermal expansion coefficient than that of the first tube support plate 16, but the second tube support plates 17 and 18 are the first tube support plates 17 and 18. It may be made of a material having a lower coefficient of thermal expansion than that of the tube support plate 16, and the first tube support plate 16 and the second tube support plates 17 and 18 may be different from each other.

また、上述した実施例では、第1管支持板16と第2管支持板17,18とを交互に配置したが、この場合、全ての管支持板16,17,18をこのように配置してもよいし、振動が発生しやすい領域の管支持板16,17,18とこのように配置してもよい。   In the above-described embodiment, the first tube support plates 16 and the second tube support plates 17 and 18 are alternately arranged. In this case, all the tube support plates 16, 17 and 18 are arranged in this way. Alternatively, the tube support plates 16, 17, and 18 may be arranged in this manner in a region where vibration is likely to occur.

また、上述した実施例では、第2管支持板17,18を胴部11に対して径方向に相対移動自在に支持したが、第2管支持板17,18と共に胴部11が熱延びすることから、この支持構成がなくてもよいものである。   Further, in the above-described embodiment, the second tube support plates 17 and 18 are supported so as to be relatively movable in the radial direction with respect to the body portion 11, but the body portion 11 extends hot together with the second tube support plates 17 and 18. Therefore, this support structure is not necessary.

更に、上述した実施例では、第2管支持板61の中心Oに近い第2支持孔62の内径に対して、中心Oから遠い第2支持孔63の内径を大きく形成したが、この構成に限定されるものではなく、伝熱管31の外径に対して第2支持孔63の内径を十分な大きさに設定すれば、全ての第2支持孔63の内径を同径としてもよい。   Further, in the above-described embodiment, the inner diameter of the second support hole 63 far from the center O is formed larger than the inner diameter of the second support hole 62 close to the center O of the second tube support plate 61. The inner diameter of all the second support holes 63 may be the same as long as the inner diameter of the second support hole 63 is set to be sufficiently large with respect to the outer diameter of the heat transfer tube 31.

また、上述した実施例では、熱交換器を縦型としたが、横型としてもよい。また、管板12,14を上下に配置し、その間に管支持板16,17,18を配置したが、管板を1個として伝熱管をU字形状(逆U字形状)としてもよい。   Moreover, in the Example mentioned above, although the heat exchanger was made into the vertical type, it is good also as a horizontal type. Moreover, although the tube plates 12 and 14 are arrange | positioned up and down and the tube support plates 16, 17, and 18 are arrange | positioned among them, it is good also considering a tube plate as one piece and making a heat exchanger tube into U shape (reverse U shape).

また、本発明の熱交換器は、ボイラ設備に適用される熱交換器や原子炉設備に適用される蒸気発生器など、いずれの熱交換器にも適用することができる。   Further, the heat exchanger of the present invention can be applied to any heat exchanger such as a heat exchanger applied to boiler equipment and a steam generator applied to nuclear reactor equipment.

11 胴部
12 下部管板
14 上部管板
16 第1管支持板
17,18,61 第2管支持板
21,22 取付孔
23 第1支持孔
24,25,62,63 第2支持孔
31伝熱管
11 trunk 12 lower tube plate 14 upper tube plate 16 first tube support plate 17, 18, 61 second tube support plate 21, 22 mounting hole 23 first support hole 24, 25, 62, 63 second support hole 31 Heat pipe

Claims (5)

中空形状をなす胴部と、
前記胴部内に固定されて複数の取付孔が形成される管板と、
複数の第1支持孔が所定間隔で形成されて前記胴部内に前記管板と所定間隔をもって配置される第1管支持板と、
複数の第2支持孔が所定間隔で形成されて前記胴部内に前記管板及び前記第1管支持板と所定間隔をもって配置されると共に前記第1管支持板と異なる熱膨張率の材料により構成される第2管支持板と、
端部が前記取付孔に固定されて中間部が前記第1支持孔及び前記第2支持孔に挿通して支持される複数の伝熱管と、
を有し、
高い熱膨張率の材料により構成される前記第1管支持板または前記第2管支持板は、常温時に前記第2支持孔の中央部の近傍に前記伝熱管が配置され、高温時に前記第1支持孔または前記第2支持孔の内面が前記伝熱管に接触する接触力が大きくなるように熱膨張する、
ことを特徴とする熱交換器。
A hollow body,
A tube plate fixed in the body portion to form a plurality of mounting holes;
A plurality of first support holes formed at a predetermined interval, and a first tube support plate disposed at a predetermined interval from the tube plate in the body portion;
A plurality of second support holes are formed at a predetermined interval, and are arranged in the body portion with a predetermined interval from the tube plate and the first tube support plate, and are made of a material having a coefficient of thermal expansion different from that of the first tube support plate. A second tube support plate,
A plurality of heat transfer tubes having an end fixed to the mounting hole and an intermediate portion inserted and supported through the first support hole and the second support hole;
I have a,
The first tube support plate or the second tube support plate made of a material having a high coefficient of thermal expansion has the heat transfer tube disposed in the vicinity of the center portion of the second support hole at normal temperature, and the first tube support plate at high temperature. Thermal expansion so that a contact force with which the inner surface of the support hole or the second support hole comes into contact with the heat transfer tube is increased;
A heat exchanger characterized by that.
中空形状をなす胴部と、
前記胴部内に固定されて複数の取付孔が形成される管板と、
複数の第1支持孔が所定間隔で形成されて前記胴部内に前記管板と所定間隔をもって配置される第1管支持板と、
複数の第2支持孔が所定間隔で形成されて前記胴部内に前記管板及び前記第1管支持板と所定間隔をもって配置されると共に前記第1管支持板と異なる熱膨張率の材料により構成される第2管支持板と、
端部が前記取付孔に固定されて中間部が前記第1支持孔及び前記第2支持孔に挿通して支持される複数の伝熱管と、
を有し、
前記第2管支持板は、前記胴部に対して径方向に相対移動自在に支持される、
ことを特徴とする熱交換器。
A hollow body,
A tube plate fixed in the body portion to form a plurality of mounting holes;
A plurality of first support holes formed at a predetermined interval, and a first tube support plate disposed at a predetermined interval from the tube plate in the body portion;
A plurality of second support holes are formed at a predetermined interval, and are arranged in the body portion with a predetermined interval from the tube plate and the first tube support plate, and are made of a material having a coefficient of thermal expansion different from that of the first tube support plate. A second tube support plate,
A plurality of heat transfer tubes having an end fixed to the mounting hole and an intermediate portion inserted and supported through the first support hole and the second support hole;
I have a,
The second pipe support plate is supported so as to be relatively movable in the radial direction with respect to the trunk portion.
A heat exchanger characterized by that.
中空形状をなす胴部と、
前記胴部内に固定されて複数の取付孔が形成される管板と、
複数の第1支持孔が所定間隔で形成されて前記胴部内に前記管板と所定間隔をもって配置される第1管支持板と、
複数の第2支持孔が所定間隔で形成されて前記胴部内に前記管板及び前記第1管支持板と所定間隔をもって配置されると共に前記第1管支持板と異なる熱膨張率の材料により構成される第2管支持板と、
端部が前記取付孔に固定されて中間部が前記第1支持孔及び前記第2支持孔に挿通して支持される複数の伝熱管と、
を有し、
前記複数の第2支持孔は、前記第2管支持板における径方向の外側に配置される前記第2支持孔ほど径方向の長さが長く形成される、
ことを特徴とする熱交換器。
A hollow body,
A tube plate fixed in the body portion to form a plurality of mounting holes;
A plurality of first support holes formed at a predetermined interval, and a first tube support plate disposed at a predetermined interval from the tube plate in the body portion;
A plurality of second support holes are formed at a predetermined interval, and are arranged in the body portion with a predetermined interval from the tube plate and the first tube support plate, and are made of a material having a coefficient of thermal expansion different from that of the first tube support plate. A second tube support plate,
A plurality of heat transfer tubes having an end fixed to the mounting hole and an intermediate portion inserted and supported through the first support hole and the second support hole;
I have a,
The plurality of second support holes are formed such that the length in the radial direction is longer as the second support hole is disposed on the outer side in the radial direction of the second tube support plate.
A heat exchanger characterized by that.
前記第1管支持板と前記第2管支持板とが所定間隔で交互に配置されることを特徴とする請求項1から3のいずれか一つに記載の熱交換器。 The heat exchanger according to any one of claims 1 to 3, wherein the first tube support plate and the second tube support plate are alternately arranged at a predetermined interval. 前記複数の伝熱管が鉛直方向に沿って配置されることを特徴とする請求項1から4のいずれか一つに記載の熱交換器。 The heat exchanger according to any one of claims 1 to 4 , wherein the plurality of heat transfer tubes are arranged along a vertical direction.
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