EP0260403B1 - Spacer with strips of a tube spacing grid - Google Patents

Spacer with strips of a tube spacing grid Download PDF

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Publication number
EP0260403B1
EP0260403B1 EP87110263A EP87110263A EP0260403B1 EP 0260403 B1 EP0260403 B1 EP 0260403B1 EP 87110263 A EP87110263 A EP 87110263A EP 87110263 A EP87110263 A EP 87110263A EP 0260403 B1 EP0260403 B1 EP 0260403B1
Authority
EP
European Patent Office
Prior art keywords
grid
spacer
bars
frame
bolt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87110263A
Other languages
German (de)
French (fr)
Other versions
EP0260403A1 (en
Inventor
Ulrich Engel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MAN Gutehoffnungshutte GmbH
Original Assignee
MAN Gutehoffnungshutte GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Gutehoffnungshutte GmbH filed Critical MAN Gutehoffnungshutte GmbH
Publication of EP0260403A1 publication Critical patent/EP0260403A1/en
Application granted granted Critical
Publication of EP0260403B1 publication Critical patent/EP0260403B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/007—Auxiliary supports for elements
    • F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
    • F28F9/0135—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening
    • F28F9/0136—Auxiliary supports for elements for tubes or tube-assemblies formed by grids having only one tube per closed grid opening formed by intersecting strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/20—Supporting arrangements, e.g. for securing water-tube sets
    • F22B37/205—Supporting and spacing arrangements for tubes of a tube bundle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/355—Heat exchange having separate flow passage for two distinct fluids
    • Y10S165/40—Shell enclosed conduit assembly
    • Y10S165/401—Shell enclosed conduit assembly including tube support or shell-side flow director
    • Y10S165/416—Extending transverse of shell, e.g. fin, baffle
    • Y10S165/423—Bar
    • Y10S165/424—Bar forming grid structure

Definitions

  • the invention is based on a spacer with lattice bars of a pipe spacer grid for guiding pipes, for example in steam generators, the one-piece lattice being formed from crossing lattice bars arranged in more than one plane and being surrounded by a one-piece frame which has circumferential grooves for receiving of the ends of the lattice bars, the mutual spacing of the lattice bars in the frame being carried out by spacer bolts, each having a transverse slot and a longitudinal bore.
  • Adherence to the geometric lattice structure is achieved in particular by fastening the ends of the lattice bars in the frame construction of the grating.
  • the lattice bars are fastened in the frame in different ways.
  • the bars are rigidly connected to the frame.
  • spacers are provided which allow a certain freedom of movement for the grille, which enables thermal compensation. This compensation option is important if the grating and frame are made of different materials.
  • the preamble of the main claim of the invention is based on DE-A-22 62 621.
  • the two continuous grooves arranged on the end face in the frame for receiving the lattice bars are slightly larger in width than the width of the bars.
  • Sleeves provided with a slot on one side are inserted into the frame in such a way that the slot slot of the sleeve is aligned with the groove. Before installing the bars, the sleeves must be inserted into the corresponding holes in the frame and aligned to accommodate the bars.
  • the grids can be prefabricated overall, i.e. equipped with bars can be inserted into the housing. For reasons of assembly, only one half of a grid is fitted with bars. The fitters have to climb through the alternating right and left halves of a grid, which are free of bars.
  • DE-A-25 41 986 describes the manufacture of a grating in such a way that the connection of the multi-part frame to the bars is carried out in that the teeth arranged on the upper and lower ring of the multi-part frame in recesses in the annular, inside of blocks located in the frame.
  • the bars are guided in slots in the ring-shaped blocks of the frame.
  • the object of the invention is to provide for a tube spacer grid for guiding the tube bundle of heat exchangers, in particular steam generators, an improved and simple to produce spacer in the circumferential lattice frame compared to the prior art, which on the one hand ensures a secure fixation of the lattice bars for the tubing and assembly to avoid moving the bars.
  • this fixation should not be form-fitting, because different thermal expansions between bars and frames must be absorbed due to the material differences in bars and frames.
  • Claim 2 which refers back to the main claim, relates to the method for producing a pipe spacer grid with a spacer.
  • the simple to produce spacer bolts according to the invention offer the possibility of using a one-piece lattice frame with the smallest possible profile cross-section and ensure precise positioning of the bars in the lattice frame.
  • a pasty plastic is inserted between the bolt slot and the lattice rod through the longitudinal hole in the spacer bolt, which creates a non-positive connection between the bolt and the lattice rod after curing.
  • the holes in the one-piece grid frame are each closed with an upper and lower cover ring.
  • the plastic introduced when the heat exchanger is in operation, becomes liquid and is rinsed out by the medium which flows around the holder with a certain temperature, so that temperature-related expansions can take place within the construction of the lattice bar frame.
  • a spacer bolt (1) is inserted into a hole in the lattice frame (2) and secured by an overlying cover ring (4).
  • a transverse slot (5) in the spacer bolt (1) extends over the lattice bar (3) and positions it in the lattice frame (2).
  • the spacer pin engages in a recess (7) in the lattice bar (3) and thus prevents the lattice bar (3) from being pulled out of the lattice frame (2).
  • a paste-like plastic (9) can be inserted between the bolt slots (5) and tubular bars (3) through a longitudinal hole (8) after the lattice frame (2) has been fitted with bars (3) and spacer bolts (1). After the plastic (9) has hardened, a non-positive connection is made between the spacer bolts (1) and the lattice bars (3), so that the pipe spacing grid remains positioned and fixed in the lattice frame (2) for the subsequent operations.
  • the plastic (9) is rinsed out by the medium surrounding it at a certain temperature and thus releases the lattice rod (3) for temperature-related linear expansion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Sewage (AREA)

Description

Die Erfindung geht aus von einem Abstandshalter mit Gitterstäben eines Rohrabstandsgitters zum Führen von Rohren, beispielsweise bei Dampferzeugern, wobei das einteilige Gitter aus sich kreuzenden, in mehr als einer Ebene angeordneten Gitterstäben gebildet und von einem einteiligen Rahmen umgeben ist, der innenseitig umlaufende Nuten zur Aufnahme der Enden der Gitterstäbe aufweist, wobei die gegenseitige Abstandsfestlegung der Gitterstäbe im Rahmen durch Distanzbolzen, die je einen Querschlitz und eine Längsbohrung aufweisen, erfolgt.The invention is based on a spacer with lattice bars of a pipe spacer grid for guiding pipes, for example in steam generators, the one-piece lattice being formed from crossing lattice bars arranged in more than one plane and being surrounded by a one-piece frame which has circumferential grooves for receiving of the ends of the lattice bars, the mutual spacing of the lattice bars in the frame being carried out by spacer bolts, each having a transverse slot and a longitudinal bore.

Zum Berohren von Wärmetauschern ist es notwendig, daß ein genau definierter Abstand der Rohrgitterstäbe eingehalten wird. Das Einhalten der geometrischen Gitterstruktur wird insbesondere durch die Befestigung der Gitterstabenden in der Rahmenkonstruktion des Gitterrostes erreicht.To touch heat exchangers, it is necessary to maintain a precisely defined distance between the pipe bars. Adherence to the geometric lattice structure is achieved in particular by fastening the ends of the lattice bars in the frame construction of the grating.

Nach dem Stand der Technik geschieht die Befestigung der Gitterstäbe im Rahmen auf unterschiedliche Weise. Bei einigen Ausführungen sind die Gitterstäbe mit dem Rahmen starr verbunden. Bei anderen Ausführungen sind Abstandshalter vorgesehen, die einen gewissen Bewegungsspielraum für das Gitter zulassen, der einen thermischen Ausgleich ermöglicht. Diese Ausgleichsmöglichkeit ist wichtig, wenn Gitterrost und Rahmen aus unterschiedlichen Werkstoffen bestehen.According to the prior art, the lattice bars are fastened in the frame in different ways. In some versions, the bars are rigidly connected to the frame. In other versions, spacers are provided which allow a certain freedom of movement for the grille, which enables thermal compensation. This compensation option is important if the grating and frame are made of different materials.

Der Oberbegriff des Hauptanspruchs der Erfindung geht aus von der DE-A-22 62 621. Bei der Konstruktion nach diesem Stand der Technik sind die beiden stirnseitig im Rahmen angeordneten durchgehenden Nuten zur Aufnahme der Gitterstäbe in der Breite geringfügig größer als die Breite der Gitterstäbe. Einseitig mit einem Langloch versehene Hülsen sind in der Weise in den Rahmen eingesetzt, daß der Langlochschlitz der Hülse mit der Nut fluchtet. Die Hülsen müssen vor der Montage der Gitterstäbe in entsprechende Bohrungen des Rahmens eingesetzt und zur Aufnahme der Gitterstäbe ausgerichtet werden.The preamble of the main claim of the invention is based on DE-A-22 62 621. In the construction according to this prior art, the two continuous grooves arranged on the end face in the frame for receiving the lattice bars are slightly larger in width than the width of the bars. Sleeves provided with a slot on one side are inserted into the frame in such a way that the slot slot of the sleeve is aligned with the groove. Before installing the bars, the sleeves must be inserted into the corresponding holes in the frame and aligned to accommodate the bars.

Die Gitter können insgesamt vorgefertigt, d.h. mit Gitterstäben ausgerüstet in das Gehäuse eingesetzt werden. Aus Gründen der Montage wird jeweils nur eine Hälfte eines Gitters mit Gitterstäben bestückt. Durch die von Gitterstäben frei gebliebenen, abwechselnd rechten und linken Hälften eines Gitters müssen die Monteure zum Einfädeln der Rohre steigen.The grids can be prefabricated overall, i.e. equipped with bars can be inserted into the housing. For reasons of assembly, only one half of a grid is fitted with bars. The fitters have to climb through the alternating right and left halves of a grid, which are free of bars.

Die DE-A-25 41 986 beschreibt die Fertigung eines Gitterrostes in der Weise, daß die Verbindung des mehrteiligen Rahmens mit den Gitterstäben dadurch erfolgt, daß jeweils die an dem oberen und unteren Ring des mehrteiligen Rahmens angeordneten Zähne in Aussparungen an den ringförmigen, innerhalb des Rahmens befindlichen Blöcken eingreifen. In Schlitzen der ringförmigen Blöcke des Rahmens sind die Gitterstäbe geführt.DE-A-25 41 986 describes the manufacture of a grating in such a way that the connection of the multi-part frame to the bars is carried out in that the teeth arranged on the upper and lower ring of the multi-part frame in recesses in the annular, inside of blocks located in the frame. The bars are guided in slots in the ring-shaped blocks of the frame.

Aufgabe der Erfindung ist es, für ein Rohrabstandsgitter zur Führung der Rohrbündel von Wärmetauschern, insbesondere Dampferzeugern, eine gegenüber dem Stand der Technik verbesserte und einfach herstellbare Abstandshalterung im umlaufenden Gitterrahmen zu schaffen, die zum einen eine sichere Fixierung der Gitterstäbe für die Berohrung und Montage gewährleistet, um ein Verschieben der Stäbe zu vermeiden. Zum anderen darf aber im Betriebszustand des Wärmetauschers diese Fixierung nicht formschlüssig sein, weil unterschiedliche Wärmedehnungen zwischen Gitterstäben und Rahmen infolge der Werkstoffunterschiede bei Stäben und Rahmen aufgefangen werden müssen.The object of the invention is to provide for a tube spacer grid for guiding the tube bundle of heat exchangers, in particular steam generators, an improved and simple to produce spacer in the circumferential lattice frame compared to the prior art, which on the one hand ensures a secure fixation of the lattice bars for the tubing and assembly to avoid moving the bars. On the other hand, in the operating state of the Heat exchanger this fixation should not be form-fitting, because different thermal expansions between bars and frames must be absorbed due to the material differences in bars and frames.

Die Erfindung löst diese Aufgabe in der Weise, wie es im Hauptanspruch angegeben ist. Der auf den Hauptanspruch rückbezogene Anspruch 2 betrifft das Verfahren zur Herstellung eines Rohrabstandsgitters mit einem Abstandshalter.The invention solves this problem in the manner as specified in the main claim. Claim 2, which refers back to the main claim, relates to the method for producing a pipe spacer grid with a spacer.

Die erfindungsgemäßen einfach herzustellenden Distanzbolzen bieten die Möglichkeit der Verwendung eines einteiligen Gitterrahmens mit möglichst geringem Profilquerschnitt und gewährleisten eine genaue Positionierung der Stäbe im Gitterrahmen.The simple to produce spacer bolts according to the invention offer the possibility of using a one-piece lattice frame with the smallest possible profile cross-section and ensure precise positioning of the bars in the lattice frame.

Nachdem die Abstandsfestlegung der Gitterstäbe im Gitterrahmen durch Aufsetzen der Distanzbolzen erfolgt ist, wird durch die Längsbohrung im Distanzbolzen ein pastöser Kunststoff zwischen Bolzenschlitz und Gitterstab eingebracht, der nach Aushärtung eine kraftschlüssige Verbindung von Bolzen und Gitterstab herstellt. Nach Einbringen des Kunststoffs werden die Bohrungen des einteiligen Gitterrahmens jeweils mit einem oberen und unteren Abdeckring verschlossen.After the spacing of the lattice bars in the lattice frame has been established by attaching the spacer bolts, a pasty plastic is inserted between the bolt slot and the lattice rod through the longitudinal hole in the spacer bolt, which creates a non-positive connection between the bolt and the lattice rod after curing. After inserting the plastic, the holes in the one-piece grid frame are each closed with an upper and lower cover ring.

Der eingebrachte Kunststoff wird, wenn sich der Wärmetauscher in Betrieb befindet, flüssig und durch das die Halterung mit bestimmter Temperatur umspülende Medium ausgespült, so daß temperaturbedingte Ausdehnungen innerhalb der Konstruktion Gitterstab - Rahmen stattfinden können.The plastic introduced, when the heat exchanger is in operation, becomes liquid and is rinsed out by the medium which flows around the holder with a certain temperature, so that temperature-related expansions can take place within the construction of the lattice bar frame.

Die Herstellung des Rohrabstandsgitters in einteiliger Form sowie das Einbringen der Gitter in den Dampferzeuger wird nach der Erfindung beschleunigt und vereinfacht. Die Monteure müssen während der Berohrung des Dampferzeugers nicht mehr in das Gehäuse steigen, um Einführungshilfe beim Einfädeln der Rohre zu geben.The manufacture of the tube spacer grille in one-piece form and the introduction of the grille into the steam generator is accelerated and simplified according to the invention. The installers no longer have to step into the housing while the steam generator is being piped in order to provide insertion assistance when threading the pipes.

Ein Ausführungsbeispiel der Erfindung wird nachstehend an Hand der Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to the drawing.

Es zeigen:

Fig. 1
ein Rohrabstandsgitter in der Draufsicht,
Fig. 2
einen Schnitt längs der Linie A-A gem. Fig. 1
Fig. 3
eine Teildraufsicht mit Ausbrüchen,
Fig. 4
eine Vorderansicht des Distanzbolzens,
Fig. 5
einen Schnitt längs der Linie B-B gem. Fig. 4,
Fig. 6
eine Draufsicht des Distanzbolzens.
Show it:
Fig. 1
a pipe spacing grid in top view,
Fig. 2
a section along the line AA acc. Fig. 1
Fig. 3
a partial top view with outbreaks,
Fig. 4
a front view of the spacer bolt,
Fig. 5
a section along the line BB acc. Fig. 4,
Fig. 6
a top view of the spacer bolt.

Nach den Figuren wird ein Distanzbolzen (1) in eine Bohrung des Gitterrahmens (2) eingesetzt und durch einen aufliegenden Abdeckring (4) gesichert.According to the figures, a spacer bolt (1) is inserted into a hole in the lattice frame (2) and secured by an overlying cover ring (4).

Ein Querschlitz (5) im Distanzbolzen (1) greift über den Gitterstab (3) und positioniert diesen im Gitterrahmen (2).A transverse slot (5) in the spacer bolt (1) extends over the lattice bar (3) and positions it in the lattice frame (2).

Mit einer im Querschlitz (5) liegenden Nase (6) greift der Distanzbolzen in eine Ausnehmung (7) des Gitterstabes (3) ein und verhindert damit ein Herausziehen des Gitterstabes (3) aus dem Gitterrahmen (2).With a nose (6) lying in the transverse slot (5), the spacer pin engages in a recess (7) in the lattice bar (3) and thus prevents the lattice bar (3) from being pulled out of the lattice frame (2).

Durch eine Längsbohrung (8) kann nach dem Bestücken des Gitterrahmens (2) mit Gitterstäben (3) und Distanzbolzen (1) ein pasteuser Kunststoff (9) zwischen die Bolzenschlitze (5) und Rohrgitterstäbe (3) eingebracht werd en. Nach Aushärtung des Kunststoffes (9) ist eine kraftschlüssige Verbindung zwischen den Distanzbolzen (1) und den Gitterstäben (3) hergestellt, so daß für die nachfolgenden Arbeitsgänge das Rohrabstandsgitter im Gitterrahmen (2) positioniert und fixiert bleibt.A paste-like plastic (9) can be inserted between the bolt slots (5) and tubular bars (3) through a longitudinal hole (8) after the lattice frame (2) has been fitted with bars (3) and spacer bolts (1). After the plastic (9) has hardened, a non-positive connection is made between the spacer bolts (1) and the lattice bars (3), so that the pipe spacing grid remains positioned and fixed in the lattice frame (2) for the subsequent operations.

Während des Betriebes wird der Kunststoff (9) durch das ihn umspielende Medium bei einer bestimmten Temperatur ausgespült und gibt somit den Gitterstab (3) für temperaturbedingte Längenausdehnungen frei.During operation, the plastic (9) is rinsed out by the medium surrounding it at a certain temperature and thus releases the lattice rod (3) for temperature-related linear expansion.

Claims (2)

  1. Spacer with grid bars of a pipe spacer grid for guiding pipes, for example in steam generators, wherein the single-piece grid is composed of intersecting grid bars (3) arranged in more than one plane and surrounded by a single-piece frame (2) which comprises peripheral grooves on the inside for receiving the ends of the grid bars (3), wherein the distance between the grid bars (3) in the frame (2) is fixed by spacer bolts (1) which each comprise a transverse slot (5) and a longitudinal bore (8), characterised in that the transverse slot (5) of each spacer bolt (1) is straight through and opens towards a bottom surface of the spacer bolt and comprises clearance adjustment relative to the grid bar for receiving the grid bar (3), that the transverse slot (5) is reduced in its height and hence comprises a projection (6) which engages in a corresponding recess (7) of the grid bar (3), that the longitudinal bore (8) is designed as a through-hole or blind hole and allows the introduction of a pasty synthetic material (9) between the transverse slot (5) and the grid bar (3) and that the spacer bolts (1) are secured by a peripheral covering ring (4).
  2. Method for the manufacture of a pipe spacer grid with a spacer according to claim 1, characterised in that after the distance between the grid bars (3) in the grid frame (2) has been fixed by mounting the spacer bolts (1) through the longitudinal bore (8), in the spacer bolt (1) is introduced the pasty synthetic material (9) which after hardening forms a frictional bond between bolt (1) and grid bar (3) and which, in case of use in a heat exchanger, is flushed out during operation at a given temperature.
EP87110263A 1986-09-19 1987-07-16 Spacer with strips of a tube spacing grid Expired - Lifetime EP0260403B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863631886 DE3631886A1 (en) 1986-09-19 1986-09-19 SPACER FOR GRID ROD OF A PIPE GRID IN HEAT EXCHANGERS
DE3631886 1986-09-19

Publications (2)

Publication Number Publication Date
EP0260403A1 EP0260403A1 (en) 1988-03-23
EP0260403B1 true EP0260403B1 (en) 1991-05-15

Family

ID=6309923

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110263A Expired - Lifetime EP0260403B1 (en) 1986-09-19 1987-07-16 Spacer with strips of a tube spacing grid

Country Status (6)

Country Link
US (1) US4784220A (en)
EP (1) EP0260403B1 (en)
KR (1) KR880004288A (en)
DE (2) DE3631886A1 (en)
ES (1) ES2022219B3 (en)
IN (1) IN170068B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038813A1 (en) * 1990-12-05 1992-06-11 Siemens Ag Boiler unit for gas and steam turbine plant - incorporates flue gas channel over which is fitted boiler cover and hot surface arrangement
DE19511265A1 (en) * 1995-03-27 1996-10-02 Siemens Ag Lattice spacer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388638A (en) * 1993-12-28 1995-02-14 Phillips Petroleum Company Rod baffle heat exchanger
US5527865A (en) * 1995-03-24 1996-06-18 The University Of North Carolina At Chapel Hill Multi-phase polymerization process

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575236A (en) * 1969-08-13 1971-04-20 Combustion Eng Formed plate tube spacer structure
DE2262621C3 (en) * 1972-12-21 1982-11-11 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 4200 Oberhausen Spacer for the tubes of a tube apparatus, in particular a steam generator, having a tube bundle of straight or U-shaped tubes, and a method for piping it
DE2316133C2 (en) * 1973-03-30 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Shell and tube heat exchanger
IT1038778B (en) * 1975-06-09 1979-11-30 Breda Termomeccanica Spa METHOD FOR MAKING A GRID CONSISTING OF TWO DIFFERENT MATERIALS ABLE TO BE INITIALLY RIGID WHILE AFTER COMMISSIONING IT ALLOWS DIFFERENTIAL THERMAL EXPANSION
IT1065374B (en) * 1976-12-21 1985-02-25 Breda Termomeccanica Spa SUPPORT GRID FOR TUBES AND ITS ASSEMBLY IN A STEAM GENERATOR OR SIMILAR
IT1096096B (en) * 1978-05-17 1985-08-17 Soligno Vincenzo GUIDE-SUPPORT OF THE GRID TYPE FOR PIPES FOR STEAM GENERATORS
US4570883A (en) * 1983-04-29 1986-02-18 Westinghouse Electric Corp. Tube support grid

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038813A1 (en) * 1990-12-05 1992-06-11 Siemens Ag Boiler unit for gas and steam turbine plant - incorporates flue gas channel over which is fitted boiler cover and hot surface arrangement
DE4038813C2 (en) * 1990-12-05 1998-01-29 Siemens Ag Boiler arrangement
DE19511265A1 (en) * 1995-03-27 1996-10-02 Siemens Ag Lattice spacer

Also Published As

Publication number Publication date
ES2022219B3 (en) 1991-12-01
KR880004288A (en) 1988-06-03
DE3770090D1 (en) 1991-06-20
EP0260403A1 (en) 1988-03-23
IN170068B (en) 1992-02-01
DE3631886A1 (en) 1988-03-31
US4784220A (en) 1988-11-15

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