JPH05296681A - Structural body for supporting heat transfer tube - Google Patents

Abstract

PURPOSE:To minimize the deviation of assembling dimensions and permit the avoiding of the damage of heat transfer tubes by attaching a reinforcing member to the intersecting part of thin sheets with each other, in a structural body for supporting the heat transfer tube, which is constituted of the combination of thin sheets in the shape of a lattice for supporting the middle area of the heat transfer tube. CONSTITUTION:In a multi-tube type heat exchanger, both ends of a multitude of heat transfer tubes 8 are connected to tube plates while the intermediate parts of the heat transfer tubes are supported by a plurality of heat transfer tube supporting structural bodies. A heat transfer tube supporting structural body is constituted so as to have a lattice structure by a method wherein slits coping with the width of thin sheets 1 to be combined are formed and a multitude of such thin sheets 1 are arranged in transverse and lateral directions while the thin sheets are incorporated into each other utilizing the slits 3.... A reinforcing member 18, having the size B of thin sheets inserting section, which is slightly smaller than the width size of the thin sheets 1, and having the shape and size A of the upper surface, which is slightly larger than the thickness of the thin sheet 1, is fitted to the intersecting parts of the thin sheets 1 of such heat transfer tube supporting body. According to this method, welding, accompanied by assembling can be eliminated and the manufacture of the same structural body can be facilitated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は多管式熱交換器に係り、
特に伝熱管の中間領域の支持手段としての機能を有する
伝熱管支持構造体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-tube heat exchanger,
In particular, the present invention relates to a heat transfer tube support structure having a function as a support means in an intermediate region of the heat transfer tube.

【０００２】[0002]

【従来の技術】火力、原子力発電プラントその他の各種
産業プラントにおいては、多管式熱交換器が広く使用さ
れている。2. Description of the Related Art Multi-tube heat exchangers are widely used in thermal power plants, nuclear power plants and various other industrial plants.

【０００３】この多管式熱交換器は並列した多数の伝熱
管内に流れる流体と、それらの外側を流れる管外流体と
の間で伝熱管の管壁を通して熱交換をさせるもので、伝
熱管に対する流れの方向により、直交流式と、平行流式
と、ジグザグ流式とがある。This multi-tube heat exchanger is designed to exchange heat between the fluid flowing in a large number of parallel heat transfer tubes and the fluid outside the tubes through the tube wall of the heat transfer tube. There are a cross flow type, a parallel flow type, and a zigzag flow type depending on the flow direction with respect to.

【０００４】多管式熱交換器では伝熱管の振動または過
度のたわみを防止するために、適切な支持間隔となるよ
うに伝熱管の長手方向の数カ所に伝熱管支持構造体を設
けている。この伝熱管支持構造体の代表的なものは伝熱
管の外径よりも若干大きい口径の管孔を伝熱管配列に合
わせてあけ、伝熱管を管孔内面で支えるバッフルプレー
トである。しかしながら、このバッフルプレートは孔あ
け加工する時、管孔の芯の加工精度が何枚かのバッフル
プレートの間でばらつきが生じるため、組立時に同芯を
保つことが難しいという問題がある。また、バッフルプ
レートの強度上の制約から伝熱管のピッチを小さくする
ことができないので、熱交換器の小型化が難しいという
問題がある。In the multi-tube heat exchanger, in order to prevent vibration or excessive bending of the heat transfer tube, heat transfer tube support structures are provided at several positions in the longitudinal direction of the heat transfer tube so as to have appropriate support intervals. A typical example of this heat transfer tube support structure is a baffle plate in which tube holes having a diameter slightly larger than the outer diameter of the heat transfer tubes are opened in accordance with the arrangement of the heat transfer tubes and the heat transfer tubes are supported on the inner surface of the tube holes. However, this baffle plate has a problem that it is difficult to maintain the concentricity at the time of assembly, because the machining accuracy of the core of the tube hole varies among several baffle plates when drilling. Further, since the pitch of the heat transfer tubes cannot be reduced due to the restriction on the strength of the baffle plate, there is a problem that it is difficult to downsize the heat exchanger.

【０００５】このような問題を解決する手段として薄板
を格子状に組み合わせた構造の伝熱管支持構造体が提案
されている。図６に示す伝熱管支持構造体の例では、薄
板１，２の厚さに見合う幅のスリット３を入れ、これら
の薄板１，２同士をスリット３を使って格子構造に多数
組み合わせたもので、図７に示すような伝熱管支持構造
体４を構成する。図８に示す他の伝熱管支持構造体の例
では、山谷が連なるように交互に折り曲げられた鋸歯状
薄板５は、その山部と谷部とに設けた嵌め込み用の突起
６と穴７により各々接合し、そこで溶接されて格子構造
を構成する。As a means for solving such a problem, there has been proposed a heat transfer tube supporting structure having a structure in which thin plates are combined in a lattice shape. In the example of the heat transfer tube support structure shown in FIG. 6, a slit 3 having a width corresponding to the thickness of the thin plates 1 and 2 is inserted, and a plurality of these thin plates 1 and 2 are combined into a lattice structure using the slits 3. The heat transfer tube support structure 4 as shown in FIG. 7 is configured. In another example of the heat transfer tube support structure shown in FIG. 8, the serrated thin plates 5 that are alternately bent so that the peaks and valleys are continuous are formed by fitting projections 6 and holes 7 provided in the peaks and valleys. Each is joined and welded there to form a lattice structure.

【０００６】いずれの例の場合にも伝熱管８は、この格
子の目の部分に納められ、薄板とその外周部分で接触す
る。このような伝熱管支持構造体は、一般に、エッグク
レート方式と呼ばれ、管外側の流れが伝熱管軸に平行に
流れる平行流または伝熱管軸に直交に流れる直交流で使
用されることが多い。In any of the examples, the heat transfer tube 8 is housed in the mesh portion of the lattice and contacts the thin plate at its outer peripheral portion. Such a heat transfer tube support structure is generally called an egg crate system and is often used in a parallel flow in which the flow on the outside of the tube flows parallel to the axis of the heat transfer tube or a cross flow which flows perpendicular to the axis of the heat transfer tube. ..

【０００７】さらに、管外側の流れを任意に伝熱管軸に
平行と直交に交互にジグザグに流すいわゆるジグザグ流
とするために、タブと呼ばれる流動抵抗体を設けたタブ
付エッグクレートもある。Further, there is a tab-equipped egg crate provided with a flow resistor called a tab so that the flow on the outside of the tube is arbitrarily changed into a so-called zigzag flow that is alternately and parallel to the axis of the heat transfer tube.

【０００８】図９はタブ付きエッグクレートを部分的に
拡大して示すもので、図８に示す伝熱管支持構造体を構
成する鋸歯状薄板５に設けた切欠き部９を折り曲げてタ
ブ10が形成されている。鋸歯状薄板５はその山部と谷部
に設けた嵌め込み用の突起６と穴７により各々接合し、
そこで溶接されている。また、このタブは図６に示すス
リット付き薄板１の場合にも同様に形成される。FIG. 9 is a partially enlarged view of an egg crate with a tab. The tab 10 is formed by bending the notch 9 provided in the serrated thin plate 5 constituting the heat transfer tube support structure shown in FIG. Has been formed. The serrated thin plate 5 is joined by the fitting projections 6 and the holes 7 provided at the peaks and valleys,
It is welded there. Further, this tab is also formed in the case of the thin plate with slit 1 shown in FIG.

【０００９】タブ付きエッグクレートを用いた伝熱管支
持構造体では、タブ付きエッグクレート単独で使用され
ることは少なく、タブ無し部とタブ付き部を組み合わさ
れた形で使用される。In the heat transfer tube support structure using the tabbed egg crate, the tabbed egg crate is rarely used alone, and the tabless portion and the tabbed portion are used in combination.

【００１０】このような構成のタブ付きエッグクレート
による伝熱管支持構造体において、伝熱管支持構造タブ
無し部では、伝熱管と格子状に組み合わされた薄板の間
に隙間があり、伝熱管に平行な方向に対する管外流体の
流動抵抗が小さいので、管外流体は主にこの方向に流れ
る。また、伝熱管支持構造タブ付き部では、管外流体は
タブに遮られ、伝熱管に対し平行な方向には多くは流れ
ず、伝熱管と直角な方向に流れる傾向が生じ、その結果
管外流体はジグザグ流となる。In the heat transfer tube support structure using the tabbed egg crate having the above-described structure, in the section without the heat transfer tube support structure tab, there is a gap between the heat transfer tube and the thin plates combined in a grid pattern, and the heat transfer tube is parallel to the heat transfer tube. Since the flow resistance of the extracorporeal fluid in various directions is small, the extracorporeal fluid mainly flows in this direction. In addition, in the heat transfer tube support structure tabbed part, the fluid outside the tube is blocked by the tab and does not flow much in the direction parallel to the heat transfer tube, but tends to flow in the direction perpendicular to the heat transfer tube. The fluid becomes a zigzag flow.

【００１１】このタブ付きエッグクレートによる伝熱管
支持構造体を使用した熱交換器を図10に示す。図中、８
は伝熱管、11は管板、12は胴、太い実線で示す13は伝熱
管支持構造タブ付き部、細い実線で示す14は伝熱管支持
構造タブ無し部である。FIG. 10 shows a heat exchanger using the heat transfer tube support structure by the tabbed egg crate. 8 in the figure
Is a heat transfer tube, 11 is a tube plate, 12 is a shell, 13 is a portion indicated by a thick solid line, is a portion with a heat transfer tube supporting structure tab, and 14 is a thin solid line is a portion without a heat transfer tube supporting structure tab.

【００１２】上記構成において、熱交換器下部の入口部
15より伝熱管支持構造体によって仕切られた熱交換器内
の第１のセクションに流入した管外流体は、まず、伝熱
管支持構造タブ付き部13と管板11とに挟まれた流路を通
るので伝熱管８に対し直角な方向に主に流れる。続い
て、伝熱管支持構造タブ無し部14を通って次のセクショ
ンに流入するが、この伝熱管支持構造タブ無し部14では
管外流体は主に伝熱管８に平行に流れることになる。さ
らに、次の伝熱管支持構造タブ付き部13に挟まれた部分
では管外流体は伝熱管８と直角方向に流れる。In the above structure, the inlet part at the bottom of the heat exchanger
The external fluid flowing into the first section in the heat exchanger partitioned by the heat transfer tube support structure from 15 first flows through the flow path sandwiched between the heat transfer tube support structure tabbed portion 13 and the tube plate 11. Since it passes, it mainly flows in the direction perpendicular to the heat transfer tube 8. Subsequently, the heat transfer tube supporting structure does not pass through the tabless portion 14 and flows into the next section. In the heat transfer tube supporting structure tabless portion 14, the external fluid mainly flows in parallel to the heat transfer tube 8. Further, the fluid outside the tube flows in the direction perpendicular to the heat transfer tube 8 in the portion sandwiched by the next portion 13 with the heat transfer tube support structure tab.

【００１３】このように管外流体は伝熱管支持構造タブ
付き部13に挟まれた流路では伝熱管８に対し直角な方向
に主に流れ、伝熱管支持構造タブ無し部14近傍の流路で
は伝熱管８に対し平行な方向に主に流れてジグザグ流と
なる。タブ付きエッグクレートを含めたエッグクレート
方式の伝熱管支持構造体は、バッフルプレート方式の伝
熱管支持構造体と比較して以下の長所がある。 （１）バッフルプレートの厚さは、一般に20mm以下であ
るのに対し、エッグクレートは通常約40mm程度であり、
幅が広い分支持特性に優れる。 （２）バッフルプレートに比べ、エッグクレートのほう
が管孔の芯ずれが少なく、伝熱管の挿入が容易である。 （３）バッフルプレートに比べ、エッグクレートのほう
が伝熱管との接触面が滑らかであり、伝熱管の支持構造
としてより適切である。 （４）ステンレス鋼をエッグクレート材料として用いる
ことにより、耐食性の面で炭素鋼を用いるバッフルプレ
ートよりも優れている。As described above, the fluid outside the tube mainly flows in a direction perpendicular to the heat transfer tube 8 in the flow path sandwiched by the tabs 13 with the heat transfer tube support structure, and the flow path near the section 14 without the heat transfer tube support structure tab. Then, the current mainly flows in a direction parallel to the heat transfer tube 8 to form a zigzag flow. The heat transfer tube support structure of the egg crate system including the tabbed egg crate has the following advantages over the heat transfer tube support structure of the baffle plate system. (1) The thickness of the baffle plate is generally 20 mm or less, while the egg crate is usually about 40 mm,
Wide support gives excellent support characteristics. (2) Compared with the baffle plate, the egg crate has less misalignment of the tube hole, and the heat transfer tube can be easily inserted. (3) Compared to the baffle plate, the egg crate has a smoother contact surface with the heat transfer tube and is more suitable as a support structure for the heat transfer tube. (4) By using stainless steel as the egg crate material, it is superior in corrosion resistance to the baffle plate using carbon steel.

【００１４】（５）バッフルプレートの場合、支持間隔
が短い箇所と長い箇所が生じてしまうが、エッグクレー
トの場合は、支持間隔を短く一定にできるので伝熱管の
振動防止の観点で優れている。 （６）タブを付ける位置およびタブの面積を変化させる
ことにより、管外側流体の流動様式を制御することがで
きる。(5) In the case of the baffle plate, a portion having a short support interval and a portion having a long support interval are formed, but in the case of the egg crate, the support interval can be made short and constant, which is excellent in terms of preventing vibration of the heat transfer tube. .. (6) The flow mode of the fluid outside the tube can be controlled by changing the position where the tab is attached and the area of the tab.

【００１５】エッグクレートの先行例としては、特公昭
46-32034号、特願昭55-14493号公報等が知られている。
どちらも薄板列をある角度をもって交差するように構成
したものである。タブ付きエッグクレートの先行例とし
ては、米国特許第4210202 号等が知られている。As a precedent example of the egg crate, Japanese Patent Publication Sho
46-32034 and Japanese Patent Application No. 55-14493 are known.
In both cases, the thin plate rows are configured to intersect at an angle. U.S. Pat. No. 4210202 is known as a prior art example of the tabbed egg crate.

【００１６】[0016]

【発明が解決しようとする課題】以上のような長所のあ
るエッグクレートに対し、特にタブ付きエッグクレート
に対し以下に述べるような短所があり、製作上の問題点
となっていた。すなわち、図７に示すような格子構造の
伝熱管支持構造体においては薄板１，２がスリット３を
使って嵌み合う構造のために薄板１，２同士の結合が強
固でなく、伝熱管外流体や伝熱管８から加えられる力に
よって結合状態が不安定になり易い。また、薄板１，２
の位置がずれたり、反りやたわみが生じて位置の定まら
ない伝熱管８に振動などが発生し、その表面に傷が生じ
るかあるいは振動が激しくなると、伝熱管８が破損して
しまう危険性がある。The egg crate having the above advantages, and particularly the tabbed egg crate, has the following disadvantages, which has been a problem in production. That is, in the heat transfer tube support structure having a lattice structure as shown in FIG. 7, the thin plates 1 and 2 are not firmly bonded to each other because the thin plates 1 and 2 are fitted together using the slits 3, and The coupled state is likely to become unstable due to the fluid or the force applied from the heat transfer tube 8. Also, the thin plates 1, 2
If the position of the heat transfer tube 8 is displaced or warps or bends and vibration occurs in the heat transfer tube 8 whose position is not fixed, and the surface is scratched or violently vibrates, the heat transfer tube 8 may be damaged. is there.

【００１７】さらには図11に示すように流れの上流側に
スリット３が付いている薄板１ではスリット３とスリッ
ト３に挟まれるコア部16にフラッタ現象が生じるために
薄板１同士の結合状態が不安定となるばかりでなく、ス
リット３底部に曲げが生じ、コア部16の先端が伝熱管８
に接触し伝熱管の表面を傷付けるばかりでなく、伝熱管
の破損にいたる危険性がある。またスリット３底部に亀
裂17が生じコア部16が脱落するような場合には、伝熱管
支持構造体の強度が低下するばかりでなく格子構造を構
成する薄板が分解することも予想される。Further, as shown in FIG. 11, in the thin plate 1 having the slit 3 on the upstream side of the flow, the flutter phenomenon occurs in the slit 3 and the core portion 16 sandwiched between the slits 3, so that the thin plates 1 are connected to each other. Not only is it unstable, but the bottom of the slit 3 is bent, and the tip of the core 16 becomes the heat transfer tube 8.
There is a risk of not only damaging the surface of the heat transfer tube by contact with the heat transfer tube but also damaging the heat transfer tube. In addition, when a crack 17 occurs at the bottom of the slit 3 and the core portion 16 falls off, not only the strength of the heat transfer tube support structure lowers but also the thin plates constituting the lattice structure may be decomposed.

【００１８】そのため、従来はこのような場合に備えて
予め薄板１，２の嵌み合い部を溶接によって固定し、強
固な結合構造を保つようにしているが、この溶接の際に
加えられる熱によって薄板１，２が大きく変形してしま
い、格子寸法に狂いが生じて寸法の矯正に手間取るか、
狂いの程度によっては伝熱管の挿入自体が難しくなると
いう問題がある。Therefore, conventionally, in preparation for such a case, the fitting portions of the thin plates 1 and 2 are previously fixed by welding so as to maintain a strong joint structure. However, the heat applied during this welding is applied. The thin plates 1 and 2 are greatly deformed by this, and the grid size is distorted and it takes time to correct the size.
There is a problem that the insertion of the heat transfer tube itself becomes difficult depending on the degree of deviation.

【００１９】図８、図９に示すような鋸歯状薄板を用い
た伝熱管支持構造体では、鋸歯状薄板５同士を溶接によ
って固定し、強固な結合構造を保つようにしているが、
この溶接の際に加えられる熱によって鋸歯状薄板５が大
きく変形してしまい、格子寸法に狂いが生じて寸法の矯
正に手間取るか、狂いの程度によっては伝熱管８の挿入
自体が難しくなるという問題がある。In the heat transfer tube support structure using the serrated thin plates as shown in FIGS. 8 and 9, the serrated thin plates 5 are fixed by welding to maintain a strong joint structure.
The heat applied during this welding causes the saw-toothed thin plate 5 to be largely deformed, resulting in a grid size error, which requires time to correct the size, or the insertion of the heat transfer tube 8 itself becomes difficult depending on the extent of the error. There is.

【００２０】さらに、タブ付きエッグクレートのタブ形
状が複雑になると、図６のスリット付き薄板３や図８に
示す鋸歯状薄板５へのタブ10の成形がかなり困難になる
という問題がある。Further, if the tab shape of the tabbed egg crate becomes complicated, there is a problem that the tab 10 is considerably difficult to form into the slitted thin plate 3 in FIG. 6 and the serrated thin plate 5 shown in FIG.

【００２１】本発明の目的はエッグクレート方式の伝熱
管支持構造体における組立寸法の狂いを最小に保つとと
もに、伝熱管を傷つけることなく、製作が容易な伝熱管
支持構造体を提供することにある。It is an object of the present invention to provide a heat transfer tube supporting structure which is easy to manufacture without damaging the heat transfer tube while keeping the assembly dimension deviation in the egg crate type heat transfer tube supporting structure to a minimum. ..

【００２２】[0022]

【課題を解決するための手段】上記目的を達成するため
の本発明は管外流体と管内流体との間に伝熱面を構成す
る熱交換器の伝熱管の中間領域を支持するために薄板を
格子状に組み合わせてなる伝熱管支持構造体において、
薄板同士の交差部に補強部材を装着したことを特徴とす
るものである。さらに、本発明の望ましい態様として、
管外流の上流側の交差部にタブ付きの補強部材を取り付
けるものである。SUMMARY OF THE INVENTION To achieve the above object, the present invention is a thin plate for supporting an intermediate region of a heat transfer tube of a heat exchanger that forms a heat transfer surface between a fluid outside a tube and a fluid inside a tube. In a heat transfer tube support structure that is a combination of
It is characterized in that a reinforcing member is attached to the intersection of the thin plates. Furthermore, as a desirable aspect of the present invention,
A reinforcing member with a tab is attached to the crossing portion on the upstream side of the extra-pipe flow.

【００２３】[0023]

【作用】本発明によると、格子状に組み合わされた薄板
の交差部に補強部材を設けたので、伝熱管を強固に精度
良く支持することができる。さらにこの補強部材はハン
マー等により容易に取り付けることができる。According to the present invention, since the reinforcing member is provided at the intersection of the thin plates assembled in a lattice shape, the heat transfer tube can be firmly and accurately supported. Further, this reinforcing member can be easily attached with a hammer or the like.

【００２４】また、交差部に取り付けた補強部材は伝熱
管に沿って流れてきた管外流体の進路を閉塞することな
く伝熱管支持構造体の強度を上げることができる。さら
にスリットとスリットに挟まれたコア部５が補強部材に
より拘束されるので、スリット３が流れの上流側にある
薄板に生じるフラッタ現象により発生する可能性のある
伝熱管の損傷等の問題はない。以上のように組立時に伝
熱管支持構造体を構成する薄板の交差部を溶接しないの
で、従来のように溶接収縮による寸法精度の確保が困難
になる問題は解消される。Further, the reinforcing member attached to the intersecting portion can increase the strength of the heat transfer tube supporting structure without blocking the path of the fluid outside the tube flowing along the heat transfer tube. Further, since the slit and the core portion 5 sandwiched by the slit are constrained by the reinforcing member, there is no problem such as damage to the heat transfer tube which may occur due to the flutter phenomenon that occurs in the thin plate on the upstream side of the flow of the slit 3. .. As described above, since the intersections of the thin plates constituting the heat transfer tube support structure are not welded at the time of assembly, it is possible to solve the problem that it is difficult to secure dimensional accuracy due to welding shrinkage as in the conventional case.

【００２５】さらに別の発明によると、補強部材にタブ
を設けたので、このタブの流動抵抗により管外側の流れ
を設計者の意図するように制御できる。すなわち、熱交
換器内の伝熱管外流の流れをジグザグ流にすることも容
易に可能である。According to still another aspect of the present invention, since the reinforcing member is provided with the tab, the flow resistance of the tab can control the flow outside the tube as intended by the designer. That is, the flow of the heat transfer tube external flow in the heat exchanger can be easily made into a zigzag flow.

【００２６】なお、管外流の下流側では流体力によって
補強部材が欠落する可能性があるので、下流側には補強
部材は取り付けないのが望ましい。また、伝熱管の挿入
に際しても補強部材の付いている方から伝熱管を挿入
し、補強部材の脱落を防止する必要がある。Note that it is desirable not to attach a reinforcing member on the downstream side, because the reinforcing member may be lost due to the fluid force on the downstream side of the extra-pipe flow. Further, when inserting the heat transfer tube, it is necessary to insert the heat transfer tube from the side having the reinforcing member to prevent the reinforcing member from falling off.

【００２７】[0027]

【実施例】以下、添付図面を参照して本発明の実施例に
ついて説明する。図１は本発明による伝熱管支持構造体
の全体構成を示し、図２は単体の補強部材18を、図３は
補強部材18を薄板１の交差部に装着した状態を示してい
る。図２において、補強部材18の上部面の形状寸法Ａは
薄板の厚さより僅かに大きくし、薄板挿入部の形状寸法
Ｂは薄板の厚さより僅かに小さいものとする。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows the entire structure of a heat transfer tube support structure according to the present invention, FIG. 2 shows a single reinforcing member 18, and FIG. 3 shows a state in which the reinforcing member 18 is mounted at the intersection of the thin plates 1. In FIG. 2, the shape dimension A of the upper surface of the reinforcing member 18 is slightly larger than the thickness of the thin plate, and the shape dimension B of the thin plate insertion portion is slightly smaller than the thickness of the thin plate.

【００２８】図３において、補強部材18の形状寸法Ｃは
薄板１のスリット３の長さより短いが、この形状寸法Ｃ
はスリット３の長さより短くても長くても良いが、薄板
１の幅寸法Ｄより短くする。In FIG. 3, the shape dimension C of the reinforcing member 18 is shorter than the length of the slit 3 of the thin plate 1.
May be shorter or longer than the length of the slit 3, but shorter than the width dimension D of the thin plate 1.

【００２９】上記の補強部材18の組み立て方法は、まず
スリット付き薄板１を組み合わせて格子構造を作り、続
いて交差部に補強部材18をハンマー等により取り付ける
（図１参照）。補強部材18は弾性支持特性を有している
ので、補強部材18は薄板より脱落することはない。この
補強部材18を用いた本発明の伝熱管支持構造体は交差部
を溶接することなく構造強度を剛にできる。In the method of assembling the reinforcing member 18, the slit thin plates 1 are first combined to form a lattice structure, and then the reinforcing member 18 is attached to the intersection with a hammer or the like (see FIG. 1). Since the reinforcing member 18 has an elastic support characteristic, the reinforcing member 18 does not fall off the thin plate. The heat transfer tube support structure of the present invention using the reinforcing member 18 can have a strong structural strength without welding the intersection.

【００３０】このように、簡単な構造で工作が容易でし
かも高い精度を容易な手段で得られる構造でありなが
ら、伝熱管外の流体が伝熱管に沿って平行に流れるのを
保証することができる。また、従来のようにエッグクレ
ート方式の伝熱管支持構造体製作時の溶接収縮による寸
法精度の確保が困難になる問題は解消される。As described above, it is possible to ensure that the fluid outside the heat transfer tube flows in parallel along the heat transfer tube while having a simple structure that is easy to work and high accuracy can be obtained by an easy means. it can. Further, the problem that it becomes difficult to secure the dimensional accuracy due to welding shrinkage at the time of manufacturing the heat transfer tube support structure of the egg crate system as in the past is solved.

【００３１】さらに、本発明の他の実施例を図４および
図５を参照して説明する。図４は本実施例の伝熱管支持
構造体の全体構成を示し、図５は単体のタブ付き補強19
を示している。上記実施例と異なる点は図１に示す補強
部材18の代わりに、図５に示すようなタブ付きの補強部
材19を用いていることである。Further, another embodiment of the present invention will be described with reference to FIGS. 4 and 5. FIG. 4 shows the entire structure of the heat transfer tube support structure of the present embodiment, and FIG. 5 shows the reinforcement with a single tab.
Is shown. The difference from the above embodiment is that a reinforcing member 19 with a tab as shown in FIG. 5 is used instead of the reinforcing member 18 shown in FIG.

【００３２】スリット付き薄板１を弾性を有する補強部
材19で挟み込むため、図中の形状寸法Ａはスリット付き
薄板１の板厚より僅かに大きくし、スリット付き薄板１
挿入部の形状寸法Ｂはスリット付き薄板１より僅かに小
さいものとする。また形状寸法Ｃはスリットの長さより
短くしても長くしても良いが、スリット付き薄板１の幅
寸法より小さいものとする。Since the thin plate with slits 1 is sandwiched by the reinforcing members 19 having elasticity, the shape dimension A in the figure is made slightly larger than the thickness of the thin plate with slits 1 so that the thin plate with slits 1
The shape dimension B of the insertion part is slightly smaller than that of the slit thin plate 1. The shape dimension C may be shorter or longer than the length of the slit, but is smaller than the width dimension of the thin plate with slit 1.

【００３３】次に、本発明のタブ付き補強部材19の上面
のタブの形状であるが、このタブで完全に流路を仕切る
場合には図中の円弧状のタブの曲率半径をこの伝熱管支
持構造体に挿入される伝熱管の外形寸法に等しくする。
また、流路を完全には仕切らずにある程度管外流体を通
過させる場合には、図中のタブに適当な開口率の穴を設
けたり、円弧状タブの形状寸法を伝熱管の外径より大き
くしたり、あるいはタブの形状を円弧状でなく他の形状
にして、通過流量を調整することができる。Next, regarding the shape of the tab on the upper surface of the reinforcing member 19 with a tab of the present invention, when the flow path is completely partitioned by this tab, the radius of curvature of the arc-shaped tab in the figure is set to this heat transfer tube. It is equal to the external dimensions of the heat transfer tube inserted into the support structure.
In addition, when the fluid outside the pipe is allowed to pass through to some extent without completely partitioning the flow passage, holes with an appropriate aperture ratio should be provided in the tabs in the figure, and the shape of the arc-shaped tab should be set to a value larger than The passage flow rate can be adjusted by increasing the size of the tab or by changing the shape of the tab to another shape instead of the arc shape.

【００３４】上記の補強部材19の組み立て方法は、ま
ず、スリット付き薄板１を組み合わせて格子構造を作
り、続いて交差部に本発明の補強部材19をハンマー等に
より取り付ける（図５参照）。補強部材19は弾性を有し
ているので、補強部材19はスリット付き薄板１より脱落
することはない。この補強部材18を用いた本発明の伝熱
管支持構造体は交差部を溶接することなく構造強度を剛
にできる。In the method of assembling the above-mentioned reinforcing member 19, first, the thin plates with slits 1 are combined to form a lattice structure, and then the reinforcing member 19 of the present invention is attached to the intersection with a hammer or the like (see FIG. 5). Since the reinforcing member 19 has elasticity, the reinforcing member 19 does not fall off from the slit thin plate 1. The heat transfer tube support structure of the present invention using the reinforcing member 18 can have a strong structural strength without welding the intersection.

【００３５】また、上記実施例では、伝熱管８をスリッ
ト付き薄板１で支えていたが、本実施例では伝熱管８を
支えるのは上記実施例と同様にスリット付き薄板１のみ
でも良いし、タブのみで支えても良いし、薄板とタブの
双方で支えても良い。さらに、タブを付ける位置やタブ
の形状およびタブの面積を変化させることにより、管外
側流体の流動様式を制御することができる。Further, in the above embodiment, the heat transfer tube 8 is supported by the slit thin plate 1, but in this embodiment, the heat transfer tube 8 may be supported only by the slit thin plate 1 as in the above embodiment, It may be supported only by the tab, or may be supported by both the thin plate and the tab. Furthermore, the flow mode of the fluid outside the tube can be controlled by changing the position where the tab is attached, the shape of the tab, and the area of the tab.

【００３６】このように、簡単な構造で工作が容易でし
かも高い精度を容易な手段で得られる構造でありなが
ら、伝熱管外の流体の流れを設計者の意図するように制
御できる。また、従来のように溶接収縮による寸法精度
の確保が困難になる問題は解消される。さらにタブの構
造がシンプルであるので、タブの成形が容易である。As described above, the flow of the fluid outside the heat transfer tube can be controlled as the designer intends, while the structure is simple and can be easily machined and high accuracy can be obtained by an easy means. Further, the problem that it is difficult to secure dimensional accuracy due to welding shrinkage as in the past is solved. Further, since the tab structure is simple, it is easy to mold the tab.

【００３７】[0037]

【発明の効果】本発明による伝熱管支持構造体において
は、組立時の溶接が無いので、従来のように溶接収縮に
よる寸法精度の確保が困難になる問題は解消される。そ
して、製作が容易で構造の簡単な伝熱管支持構造体を提
供できる。In the heat transfer tube support structure according to the present invention, since welding is not performed at the time of assembly, it is possible to solve the problem that it is difficult to secure dimensional accuracy due to welding shrinkage as in the conventional case. Further, it is possible to provide a heat transfer tube support structure that is easy to manufacture and has a simple structure.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明による伝熱管支持構造体の一実施例を示
す斜視図。FIG. 1 is a perspective view showing an embodiment of a heat transfer tube support structure according to the present invention.

【図２】図１に示される補強部材の斜視図。FIG. 2 is a perspective view of the reinforcing member shown in FIG.

【図３】図１に示される補強部材を薄板に取り付けた状
態を示す斜視図。FIG. 3 is a perspective view showing a state where the reinforcing member shown in FIG. 1 is attached to a thin plate.

【図４】本発明の他の実施例を示す斜視図。FIG. 4 is a perspective view showing another embodiment of the present invention.

【図５】図４に示されるタブ付き補強部材の斜視図。5 is a perspective view of the reinforcing member with a tab shown in FIG.

【図６】従来の薄板の一例を示す平面図。FIG. 6 is a plan view showing an example of a conventional thin plate.

【図７】従来のエッグクレート方式伝熱管支持構造体を
示す斜視図。FIG. 7 is a perspective view showing a conventional egg crate heat transfer tube support structure.

【図８】従来の鋸歯状薄板の一例を示す斜視図。FIG. 8 is a perspective view showing an example of a conventional serrated thin plate.

【図９】従来のタブ付きエッグクレート方式伝熱管支持
構造体を示す斜視図。FIG. 9 is a perspective view showing a conventional egg crate type heat transfer tube support structure with a tab.

【図１０】従来の熱交換器内の管外流体の流れを示す説
明図。FIG. 10 is an explanatory view showing a flow of an extra-tube fluid in a conventional heat exchanger.

【図１１】従来のスリット付き薄板の一例を示す平面
図。FIG. 11 is a plan view showing an example of a conventional thin plate with a slit.

【符号の説明】[Explanation of symbols]

１，２…スリット付き薄板 ８ … 伝熱管 18 … 補強部材 19 … タブ付き補強部材 1, 2 ... Thin plate with slit 8 ... Heat transfer tube 18 ... Reinforcing member 19 ... Reinforcing member with tab

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 管外流体と管内流体との間に伝熱面を構
成する熱交換器の伝熱管の中間領域を支持するために薄
板を格子状に組合せてなる伝熱管支持構造体において、
前記薄板同士の交差部に補強部材を装着したことを特徴
とする伝熱管支持構造体。1. A heat transfer tube support structure in which thin plates are combined in a grid shape to support an intermediate region of a heat transfer tube of a heat exchanger that forms a heat transfer surface between an external fluid and an internal fluid,
A heat transfer tube support structure, wherein a reinforcing member is attached to an intersection of the thin plates. 【請求項２】 前記補強部材に流動抵抗体を設けたこと
を特徴とする請求項１記載の伝熱管支持構造体。2. The heat transfer tube support structure according to claim 1, wherein a flow resistor is provided on the reinforcing member.