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EP0000497A1 - Conduit with inner ceramic insulation for conveying (of) hot fluids - Google Patents

Conduit with inner ceramic insulation for conveying (of) hot fluids Download PDF

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Publication number
EP0000497A1
EP0000497A1 EP78100361A EP78100361A EP0000497A1 EP 0000497 A1 EP0000497 A1 EP 0000497A1 EP 78100361 A EP78100361 A EP 78100361A EP 78100361 A EP78100361 A EP 78100361A EP 0000497 A1 EP0000497 A1 EP 0000497A1
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EP
European Patent Office
Prior art keywords
wall
transport line
ceramic
inner insulation
hollow body
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.)
Granted
Application number
EP78100361A
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German (de)
French (fr)
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EP0000497B1 (en
Inventor
Franz Scholz
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.)
Forschungszentrum Juelich GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Kernforschungsanlage Juelich GmbH
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Publication of EP0000497A1 publication Critical patent/EP0000497A1/en
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Publication of EP0000497B1 publication Critical patent/EP0000497B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/07—Arrangements using an air layer or vacuum the air layer being enclosed by one or more layers of insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/14—Arrangements for the insulation of pipes or pipe systems
    • F16L59/147—Arrangements for the insulation of pipes or pipe systems the insulation being located inwardly of the outer surface of the pipe
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C11/00—Shielding structurally associated with the reactor
    • G21C11/08—Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield ; Thermal insulation
    • G21C11/081—Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield ; Thermal insulation consisting of a non-metallic layer of insulating material
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors
    • 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
    • Y10S138/00—Pipes and tubular conduits
    • Y10S138/05—Pre-stress

Definitions

  • the invention relates to a ceramic inner insulation for a hot fluid-carrying transport line, which is formed by a ceramic hollow body which at least partially surrounds the flow space of the fluid and which is arranged at a short distance within an outer wall of the transport line.
  • Internal insulation for transport lines is required to protect the outer walls of the transport line, which are usually made of metallic materials, from overheating. This is particularly necessary when the hot fluids are under pressure and the loads on the transport line caused thereby have to be borne by the outer walls. Ceramic foil or fiber materials and solid ceramic insulation are known for internal insulation. The latter have particularly Proven especially for prestressed concrete tanks.
  • the object of the invention is to provide a ceramic inner insulation which is also suitable for high fluid pressures and high axial flow pressure losses while avoiding gas flows and which can also be used in a simple manner in the transport lines.
  • a ceramic inner insulation of the type mentioned above according to the invention in that the ceramic hollow body is prestressed in the unloaded state by means of clamping elements which gas-tightly enclose the hollow body on its side facing the outer wall of the transport line.
  • the preload is selected so that the inner insulation is not subjected to tensile forces in the operating state, but at least in such a way that the tensile stresses to be absorbed are limited to an admissible level.
  • the internal insulation expands so that the pretension applied by the tensioning elements is increased during operation.
  • the clamping elements also act as sealing elements. The occurrence of parasitic gas flows in the space between the inner insulation and the outer wall can be largely suppressed in an advantageous manner.
  • Draw ceramic inner insulation with tensioning elements is therefore also characterized by a higher insulating effect.
  • a further embodiment of the invention is that rings or sleeves that can be shrunk onto ceramic hollow bodies are provided as clamping elements.
  • ceramic segments that are more adaptable to the shapes of the transport lines can advantageously be used without having to fear the occurrence of parasitic gas flows.
  • the ring and sleeve are connected gas-tight to the outer wall at least in the area of these connection points. Such a connection is facilitated in that an intermediate wall is attached to the outer wall, with which the ring or the sleeve can be welded.
  • Thin-walled tubular parts can be used as the intermediate wall, which are welded to the pressure-bearing outer walls before they are annealed. The subsequent welding of the rings or sleeves does not cause any deterioration in the desired strength properties of the outer wall.
  • rings or sleeves With moderate pressures in the flow space of the transport line, further forms staltung of the invention, the rings or sleeves at the same time the outer wall of the transport line. This considerably simplifies the construction of the transport line. Since the tensioning elements are heated to a comparatively low degree when the transport line is in operation, rings or sleeves can be directly welded to one another at connection points or connected in a gas-tight manner in another suitable manner.
  • the transport line has, within an outer wall 1, a ceramic inner insulation surrounding the flow space 2 of the fluid and designed as a hollow body 3.
  • a steel tube is provided as the outer wall 1.
  • the inner insulation is formed by several segments, of which in Fi gur 2 the interlocked segments 3a to 3c are shown.
  • a space 4 is present between the inner insulation and the outer wall.
  • the ceramic hollow body 3 is enclosed on its side facing the outer wall 1 by clamping elements 5, which prestress the hollow body under pressure.
  • tensioning wires can be used as tensioning elements. An embodiment of this type is not shown in the drawing.
  • 5 rings are provided as tensioning elements, which are shrunk onto the segments of the hollow body 3 which are jointed together in order to achieve the desired prestress. This creates closed, hollow-cylindrical insulating pieces that can be inserted axially into the transport line. Centering 6 ensure mutual alignment of the lined up hollow body.
  • the clamping elements 5 are welded gas-tight to the outer wall 1.
  • the outer wall 1 is connected to a further inner, thin intermediate wall 8.
  • the intermediate wall 8 is welded into the outer wall 1 at welding points 7 ′ before the annealing treatment.
  • the intermediate wall 8 advantageously also reduces the space between the insulation and the outer wall, so that heat losses - caused by the occurrence of free convection in the space - are reduced.
  • a transport line for lower pressures is shown in axial section in FIG.
  • the inner insulation which also consists of segments in this exemplary embodiment, is spanned by sleeves 12, which at the same time form the outer wall of the transport line.
  • the sleeves 12 are welded at connection points.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • General Health & Medical Sciences (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Thermal Insulation (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

In einer Transportleitung für heiße Fluide sind den Strömungsraum (2) des Fluids zumindest teilweise umgebende keramische Hohlkörper (3) zur Innenisolierung der Transportleitung eingesetzt, die mit geringem Abstand zur äußeren Wandung (1) der Transportleitung angeordnet sind. Um hohe Fluiddrucke und hohe axiale Strömungsdruckverluste aufnehmen zu können, ist der keramische Hohlkörper (3) durch Spannelemente (5), die den Hohlkörper auf seiner der äußeren Wandung (1) der Transportleitung zugewandten Seite umschließen, im unbelasteten Zustand auf Druck vorgespannt.Ceramic hollow bodies (3) which at least partially surround the flow space (2) of the fluid are used in a transport line for hot fluids and are arranged at a short distance from the outer wall (1) of the transport line. In order to be able to absorb high fluid pressures and high axial flow pressure losses, the ceramic hollow body (3) is prestressed in the unloaded state by means of clamping elements (5) which surround the hollow body on its side facing the outer wall (1) of the transport line.

Description

Die Erfindung bezieht sich auf eins keramische Innenisolierung für eine heiße Fluide führende Transportleitung, die von einem den Strömungsraum des Fluids zumindest teilweise umgebenden keramischen Hohlkörper gebildet wird, der mit geringem Abstand innerhalb einer äußeren Wandung der Transportleitung angeordnet ist.The invention relates to a ceramic inner insulation for a hot fluid-carrying transport line, which is formed by a ceramic hollow body which at least partially surrounds the flow space of the fluid and which is arranged at a short distance within an outer wall of the transport line.

Innenisolierungen bei Transportlsitungen sind erforderlich, um die meist aus metallischen Werkstoffen bestehenden äußeren Wandungen der Transportleitung vor einer Überhitzung zu schützen. Dies ist vor allem dann erforderlich, wenn die heißen Fluide unter Druck stehen und die hierdurch hervorgerufenen Belastungen der Transportleitung von den äußeren Wandungen zu übernehmen sind. Zur Innenisolierung sind keramische Folien-oder Faserwerkstoffe und Festkeramikisolierungen bekannt. Letztere haben sich insbesondere für Spannbetonbehälter bewährt.Internal insulation for transport lines is required to protect the outer walls of the transport line, which are usually made of metallic materials, from overheating. This is particularly necessary when the hot fluids are under pressure and the loads on the transport line caused thereby have to be borne by the outer walls. Ceramic foil or fiber materials and solid ceramic insulation are known for internal insulation. The latter have particularly Proven especially for prestressed concrete tanks.

Bei einer keramischen Innenisolierung in einer Transportleitung für heiße Fluide treten vor allem zwei Probleme auf: Durch den erwünschten Temperaturabbau in der Innenisolierung zwischen Strömungsraum und äußerer Wandung treten an der äußeren kalten Seite der Isolierung Zugspannungen auf, die das keramische Material nur in sehr begrenztem Umfang aufnehmen kann. Die Rißgefahr bei keramischen Innenisolierungen ist infolgedessen insbesondere bei hohen Temperaturgradienten zwischen Strömungsraum-und äußerer Wandung außerordentlich hoch. Um dies zu vermeiden, wurde daher bereits vorgeschlagen, die keramische Innenisolierung in mehrere Segmente zu unterteilen. Nachteilig ist dabei jedoch, daß sich infolge der in Strömungsrichtung des Fluids bestehenden Druckgradienten eine parasitäre Gasströmung in den Fugen zwischen aneinanderliegenden Isolierungssegmenten sowie im Zwischenraum zwischen Innenisolierung und äußerer Wandung der Transportleitung einstellt. Diese unerwünschte Gasströmung setzt die Isolierwirkung in häufig unkontrollierbarer Weise stark herab, so daß örtlich für die Aufnahme der Kräfte in der Wandung unzulässig hohe Temperaturen auftreten.There are two main problems with a ceramic inner insulation in a transport line for hot fluids: Due to the desired temperature reduction in the inner insulation between the flow space and the outer wall, tensile stresses occur on the outer cold side of the insulation, which absorb the ceramic material only to a very limited extent can. As a result, the risk of cracking in the case of ceramic inner insulation is extremely high, in particular in the case of high temperature gradients between the flow space and the outer wall. To avoid this, it has therefore already been proposed to divide the ceramic inner insulation into several segments. However, it is disadvantageous that, due to the pressure gradients existing in the direction of flow of the fluid, a parasitic gas flow occurs in the joints between adjacent insulation segments and in the space between the inner insulation and the outer wall of the transport line. This undesirable gas flow greatly reduces the insulating effect in an often uncontrollable manner, so that inadmissibly high temperatures occur locally for the absorption of the forces in the wall.

Aufgabe der Erfindung ist es, unter Vermeidung von Gasströmungen außerhalb des Strömungsraumes eine auch für hohe Fluiddrucke und hohe axiale Strömungsdruckverluste geeignete keramische Innenisolierung zu schaffen, die zugleich in einfacher Weise in die Transportleitungen einsetzbar ist.The object of the invention is to provide a ceramic inner insulation which is also suitable for high fluid pressures and high axial flow pressure losses while avoiding gas flows and which can also be used in a simple manner in the transport lines.

Diese Aufgabe wird bei einer keramischen Innenisolierung der oben genannten Art gemäß der Erfindung dadurch gelöst, daß der keramische Hohlkörper mittels Spannelementen, die den Hohlkörper auf seiner der äußeren Wandung der Transportleitung zugewandten Seite gasdicht umschließen, im unbelasteten Zustand auf Druck vorgespannt ist. Die Vorspannung wird so gewählt, daß die Innenisolierung'im Betriebszustand nicht durch Zugkräfte beansprucht wird, zumindest aber so, daß die aufzunehmenden Zugspannungen auf ein zulässiges Maß beschränkt sind. Bei Betrieb dehnt sich die Innenisolierung aus, so daß die durch die Spannelemente aufgebrachte Vorspannung während des Betriebes noch erhöht wird. Die Spannelemente wirken zugleich als Dichtelemente. Das Auftreten parasitärer Gasströmungen im Zwischenraum zwischen Innenisolierung und äußerer Wandung läßt sich in vorteilhafter Weise weitgehend unterdrücken. Keramische Innenisolierungen mit Spannelementen zeichnen sich daher zugleich auch durch eine höhere Isolierwirkung aus.This object is achieved with a ceramic inner insulation of the type mentioned above according to the invention in that the ceramic hollow body is prestressed in the unloaded state by means of clamping elements which gas-tightly enclose the hollow body on its side facing the outer wall of the transport line. The preload is selected so that the inner insulation is not subjected to tensile forces in the operating state, but at least in such a way that the tensile stresses to be absorbed are limited to an admissible level. During operation, the internal insulation expands so that the pretension applied by the tensioning elements is increased during operation. The clamping elements also act as sealing elements. The occurrence of parasitic gas flows in the space between the inner insulation and the outer wall can be largely suppressed in an advantageous manner. Draw ceramic inner insulation with tensioning elements is therefore also characterized by a higher insulating effect.

Eine weitere Ausgestaltung der Erfindung besteht darin, daß als Spannelemente auf keramische Hohlkörper aufschrumpfbare Ringe oder Hülsen vorgesehen sind. In diesem Falle lassen sich in vorteilhafter Weise auch den Formen der Transportleitungen besser anpaßbare keramische Segmente einsetzen, ohne dabei das Auftreten parasitärer Gasströme befürchten zu müssen. Um auch das Einströmen von Fluid in den Zwischenraum zwischen Innenisolierung und äußerer Wandung an solchen Stellen zu vermeiden, an denen ein RohranschluB erforderlich ist, sind zumindest im Bereich dieser Anschlußstellen Ring und Hülse mit der äußeren Wandung gasdicht verbunden. Eine solche Verbindung wird dadurch erleichtert, daß an der äußeren Wandung eine Zwischenwand befestigt ist, mit der der Ring oder die Hülse verschweißbar sind. Als Zwischenwand sind dünnwandige Rohrteile verwendbar, die vor dem Glühen der drucktragenden äußeren Wandungen mit diesen verschweißt werden. Das spätere Einschweißen der Ringe oder Hülsen verursacht so keine Verschlechterung der-erwünschten Festigkeitseigenschaften der äußeren Wandung. rA further embodiment of the invention is that rings or sleeves that can be shrunk onto ceramic hollow bodies are provided as clamping elements. In this case, ceramic segments that are more adaptable to the shapes of the transport lines can advantageously be used without having to fear the occurrence of parasitic gas flows. In order to avoid the inflow of fluid into the space between the inner insulation and the outer wall at those places where a pipe connection is required, the ring and sleeve are connected gas-tight to the outer wall at least in the area of these connection points. Such a connection is facilitated in that an intermediate wall is attached to the outer wall, with which the ring or the sleeve can be welded. Thin-walled tubular parts can be used as the intermediate wall, which are welded to the pressure-bearing outer walls before they are annealed. The subsequent welding of the rings or sleeves does not cause any deterioration in the desired strength properties of the outer wall. r

Bei mäßigen Drücken im Strömungsraum der Transportleitung bilden in weiterer Ausgestaltung der Erfindung die Ringe oder Hülsen zugleich die äußere Wandung der Transportleitung. Damit vereinfacht sich der Aufbau der Transportleitung erheblich. Da die Spannelemente bei Betrieb der Transportleitung nur verhältnismäßig gering erhitzt werden, lassen sich Ringe oder Hülsen an Anschlußstellen unmittelbar miteinander verschweißen oder in sonst geeign.eter Weise gasdicht verbinden.With moderate pressures in the flow space of the transport line, further forms staltung of the invention, the rings or sleeves at the same time the outer wall of the transport line. This considerably simplifies the construction of the transport line. Since the tensioning elements are heated to a comparatively low degree when the transport line is in operation, rings or sleeves can be directly welded to one another at connection points or connected in a gas-tight manner in another suitable manner.

Die Erfindung wird anhand von Ausführungsbeispielen, die in der Zeichnung schematisch wiedergegeben sind, näher erläutert. Die Figuren zeigen im einzelnen

  • Figur 1 Transportleitung mit keramischer Innenisolierung im Axialschnitt gemäß Schnittlinie I/I nach Figur 2,
  • Figur 2 Querschnitt einer Transportleitung nach Figur 1 gemäß Schnittlinie II/II und
  • Figur 3 Transportleitung mit keramischer Innenisolierung für niederen Druck.
The invention is explained in more detail by means of exemplary embodiments which are shown schematically in the drawing. The figures show in detail
  • FIG. 1 transport line with ceramic inner insulation in axial section according to section line I / I according to FIG. 2,
  • Figure 2 cross section of a transport line according to Figure 1 along section line II / II and
  • Figure 3 Transport line with ceramic inner insulation for low pressure.

Wie aus der Zeichnung ersichtlich ist, weist die Transportleitung innerhalb einer äußeren Wandung 1 eine den Strömungsraum 2 des Fluids umgebende, als Hohlkörper 3 ausgebildete keramische Innenisolierung auf. Im Ausführungsbeispiel ist als-äußere Wandung 1 ein Stahlrohr vorgesehen. Die Innenisolierung wird von mehreren Segmenten gebildet, von denen in Figur 2 die ineinander verfugten Segmente 3a bis 3c wiedergegeben sind. Zwischen Innenisolierung und äußerer Wandung ist ein Zwischenraum 4 vorhanden. Der keramische Hohlkörper 3 wird auf seiner der äußeren Wandung 1 zugewandten Seite von Spannelementen 5 umschlossen, die den Hohlkörper auf Druck vorspannen. Als Spannelemente sind im einfachsten Falle Spanndrähte verwendbar. Ein Ausführungsbeispiel dieser Art ist in der Zeichnung nicht dargestellt.As can be seen from the drawing, the transport line has, within an outer wall 1, a ceramic inner insulation surrounding the flow space 2 of the fluid and designed as a hollow body 3. In the exemplary embodiment, a steel tube is provided as the outer wall 1. The inner insulation is formed by several segments, of which in Fi gur 2 the interlocked segments 3a to 3c are shown. A space 4 is present between the inner insulation and the outer wall. The ceramic hollow body 3 is enclosed on its side facing the outer wall 1 by clamping elements 5, which prestress the hollow body under pressure. In the simplest case, tensioning wires can be used as tensioning elements. An embodiment of this type is not shown in the drawing.

Im Ausführungsbeispiel nach Figur 1 und 2 sind als Spannelemente 5 Ringe vorgesehen, die in üblicher Weise auf die miteinander verfugten Segmente des Hohlkörpers 3 zur Erzielung der gewünschten Vorspannung aufgeschrumpft werden. Es entstehen so geschlossene hohlzylindrische Isolierstücke, die in die Transportleitung axial einsetzbar sind. Zentrierungen 6 sorgen für eine gegenseitige Ausrichtung der aneinandergereihten Hohlkörper.In the exemplary embodiment according to FIGS. 1 and 2, 5 rings are provided as tensioning elements, which are shrunk onto the segments of the hollow body 3 which are jointed together in order to achieve the desired prestress. This creates closed, hollow-cylindrical insulating pieces that can be inserted axially into the transport line. Centering 6 ensure mutual alignment of the lined up hollow body.

Um eine axiale Gasströmung im Zwischenraum 4 zu vermeiden, sind die Spannelemente 5 mit der äußeren Wandung 1 gasdicht verschweißt. Um dies ohne Beeinträchtigung der äußeren Wandung zu ermöglichen ist im dargestellten Ausführungsbeispiel die äußere Wandung 1 mit einer weiteren inneren, dünnen Zwischenwand 8 verbunden. Mit der Zwischenwand 8 sind die Spannelemente 5 an Schweißstellen 7 verschweißt. Die Zwischenwand 8 wird in der äußeren Wandung 1 an Schweißstellen 7'vor der Glühbehandlung eingeschweißt. Die Zwischenwand 8 verringert in vorteilhafter Weise zugleich den Zwischenraum zwischen Isolierung und äußerer Wandung, so daß Wärmeverluste - verursacht durch das Auftreten freier Konvektion im Zwischenraum - vermindert werden.In order to avoid an axial gas flow in the intermediate space 4, the clamping elements 5 are welded gas-tight to the outer wall 1. In order to make this possible without impairing the outer wall, in the exemplary embodiment shown the outer wall 1 is connected to a further inner, thin intermediate wall 8. With the partition 8 are the Clamping elements 5 welded at welding points 7. The intermediate wall 8 is welded into the outer wall 1 at welding points 7 ′ before the annealing treatment. The intermediate wall 8 advantageously also reduces the space between the insulation and the outer wall, so that heat losses - caused by the occurrence of free convection in the space - are reduced.

Eine Transportleitung-für geringere Drücke ist in Figur 3 im Axialschnitt dargestellt. Die auch in diesem Ausführungsbeispiel aus Segmenten bestehende Innenisolierung wird von Hülsen 12 umspannt, die zugleich die äußere Wandung der Transportleitung bilden. An Anschlußstellen werden die Hülsen 12 verschweißt.A transport line for lower pressures is shown in axial section in FIG. The inner insulation, which also consists of segments in this exemplary embodiment, is spanned by sleeves 12, which at the same time form the outer wall of the transport line. The sleeves 12 are welded at connection points.

Claims (5)

1. Keramische Innenisolierung für eine heiße Fluide führende Transportleitung, die von einem den Strömungsraum des Fluids zumindest teilweise umgebenden keramischen Hohlkörper gebildet wird, der mit geringem Ab- . stand innerhalb einer äußeren Wandung der Transportleitung angeordnet ist, dadurch gekennzeichnet,
daß der keramische Hohlkörper (3) mittels Spannelementen (5, 12), die den Hohlkörper auf seiner der äußeren Wandung (1) der Transportleitung zugewandten Seite umschließen, im unbelasteten Zustand auf Druck vorgespannt ist.1. Ceramic inner insulation for a hot fluid-carrying transport line, which is formed by a ceramic hollow body which at least partially surrounds the flow space of the fluid and which has a small diameter. stood within an outer wall of the transport line, characterized in that
that the ceramic hollow body (3) is prestressed in the unloaded state by means of clamping elements (5, 12) which surround the hollow body on its side facing the outer wall (1) of the transport line. 2. Keramische Innenisolierung nach Anspruch 1, dadurch gekennzeichnet,
daß als Spannelemente (5) auf keramische Hohlkörper aufschrumpfbare Ringe (5) oder Hülsen (12) vorgesehen sind.2. Ceramic inner insulation according to claim 1, characterized in
that rings (5) or sleeves (12) which can be shrunk onto ceramic hollow bodies are provided as clamping elements (5). 3. Keramische Innenisolierung nach Anspruch 2, dadurch gekennzeichnet,
daß im Bereich von Anschlußstellen Ring oder Hülse mit der äußeren Wandung (1) gasdicht verbunden sind.3. Ceramic inner insulation according to claim 2, characterized in
that ring or sleeve are connected gas-tight to the outer wall (1) in the area of connection points. Keramische Innenisolierung nach Anspruch 3, dadurch gekennzeichnet,
daß an der äußeren Wandung (1) eine Zwischenwand (8) befestigt ist, mit der die Ringe oder Hülsen verschweißbar sind.Ceramic inner insulation according to claim 3, characterized in
that an intermediate wall (8) is attached to the outer wall (1), with which the rings or sleeves can be welded. 5. Keramische Innenisolierung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet,
daß die Ringe (5) oder Hülsen (12) zugleich die äußere Wandung (1) der Transportleitung bilden.5. Ceramic inner insulation according to one of the preceding claims, characterized in
that the rings (5) or sleeves (12) also form the outer wall (1) of the transport line.
EP78100361A 1977-07-26 1978-07-11 Conduit with inner ceramic insulation for conveying (of) hot fluids Expired EP0000497B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2733611A DE2733611C2 (en) 1977-07-26 1977-07-26 Transport line with ceramic inner insulation for guiding hot fluids
DE2733611 1977-07-26

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EP0000497A1 true EP0000497A1 (en) 1979-02-07
EP0000497B1 EP0000497B1 (en) 1981-01-07

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EP78100361A Expired EP0000497B1 (en) 1977-07-26 1978-07-11 Conduit with inner ceramic insulation for conveying (of) hot fluids

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US (1) US4259993A (en)
EP (1) EP0000497B1 (en)
DE (1) DE2733611C2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096791A1 (en) * 1982-06-11 1983-12-28 INTERATOM Gesellschaft mit beschränkter Haftung Insulation for a hot gas pipe conduit
EP0148434A1 (en) * 1983-12-21 1985-07-17 INTERATOM Gesellschaft mit beschränkter Haftung Container for hot gases with an insulation lining made of overlapping appliances
EP0334010A1 (en) * 1988-03-19 1989-09-27 MAN Gutehoffnungshütte Aktiengesellschaft Thermally insulated pipeline
EP0441025A2 (en) * 1989-11-07 1991-08-14 The Babcock & Wilcox Company Conduit
FR2894316A1 (en) 2005-12-05 2007-06-08 Commissariat Energie Atomique HOT GAS TRANSPORT DRIVING ELEMENT AND METHOD FOR PRODUCING SUCH A COMPONENT

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981001674A1 (en) * 1979-12-15 1981-06-25 Steetley Refractories Ltd Tubular assembly for bottom casting
US4516608A (en) * 1982-09-29 1985-05-14 Electro-Petroleum, Inc. Tubular member
DK205583A (en) * 1983-05-09 1984-11-10 Hasle Klinker & Chamott CENTRAL ROOMS FOR CYCLON TO CLEAN HOT GAS
AT381367B (en) * 1984-06-20 1986-10-10 Jericha Herbert Dipl Ing Dr Te Internal insulation for high-temperature steam turbines
US4684155A (en) * 1986-04-11 1987-08-04 Cerline Ceramic Corporation Pipe elbow with abrasion resistant composite inner liner and method for forming
US4773149A (en) * 1987-09-14 1988-09-27 Gte Products Corporation Method of making ceramic tube for high temperature use
DE3821985C1 (en) * 1988-06-30 1990-03-01 Metalpraecis Berchem + Schaberg Gesellschaft Fuer Metallformgebung Mbh, 4650 Gelsenkirchen, De
DE4236895A1 (en) * 1992-10-31 1994-05-05 Maury Hans Dietmar Dip tube for a centrifugal separator (cyclone)
US20030207103A1 (en) * 2002-05-03 2003-11-06 Zvosec Charles M. System and method for protecting surfaces against corrosive compounds
US6994117B2 (en) * 2003-09-25 2006-02-07 Kerr-Mcgee Chemical, Llc Piping elbow liners
EP3506318B1 (en) 2010-04-23 2020-10-14 Atomic Energy of Canada Limited/ Énergie Atomique du Canada Limitée Pressure-tube reactor and method of operating the same
CA3048702A1 (en) * 2010-04-23 2011-10-27 Atomic Energy Of Canada Limited/Energie Atomique Du Canada Limitee Reacteur a tubes de force a plenum de caloporteur
CA2805785A1 (en) * 2012-05-02 2013-11-02 Owens Corning Intellectual Capital, Llc Duct liner
WO2013185230A1 (en) 2012-06-13 2013-12-19 Atomic Energy Of Canada Limited / Énergie Atomique Du Canada Limitée Fuel channel assembly and fuel bundle for a nuclear reactor
CN105673979B (en) * 2015-03-12 2018-07-17 周朝辉 Two points of two-layer equation wear resistant and impact resistant bend pipes of one kind and preparation method thereof
CA3125200A1 (en) 2019-01-04 2020-07-09 Canadian Pressure Control Inc. Pipeline-leak-containment apparatus
DE102021106305A1 (en) 2021-03-16 2022-09-22 Karlsruher Institut für Technologie (Körperschaft des öffentlichen Rechts) Process for manufacturing pipes with topographical internal structures

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1119469A (en) * 1966-06-14 1968-07-10 Euratom Nuclear reactor cooling duct or pressure tube with solid internal insulation
DE1804143A1 (en) * 1968-10-19 1970-04-30 Arnold Hellmut Compound ceramic/metal pipe having improved shock - absorbing poperties
DE2243995A1 (en) * 1971-09-09 1973-03-15 Commissariat Energie Atomique METHOD AND DEVICE FOR HEAT INSULATION AT HIGH TEMPERATURE

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289599C (en) *
DE223944C (en) *
US1696725A (en) * 1926-02-12 1928-12-25 Thomas E Murray Drum, pipe, fittings, etc.
GB260898A (en) * 1926-03-01 1926-11-11 Mannesmann Ag Improvements in or relating to pipes with shrunk-on hooping rings
GB296015A (en) * 1927-08-23 1928-12-27 Julius Grossweischede Improved method of making bandaged tubes for pressure-conduits
US2652943A (en) * 1947-01-09 1953-09-22 Williams Sylvester Vet High-pressure container having laminated walls
FR1222543A (en) * 1958-12-17 1960-06-10 Entpr S Campenon Bernard Pipes and hollow bodies in jacketed prestressed concrete and their production process
US3136036A (en) * 1959-05-29 1964-06-09 Dobell Curzon Method of making reinforced rocket nozzle
BE592445A (en) * 1960-06-30
US3156091A (en) * 1961-07-19 1964-11-10 Curtiss Wright Corp Multi-layer anisotropic heat shield construction
US3308853A (en) * 1963-11-06 1967-03-14 Minnesota Mining & Mfg Constrained ceramics
US3587659A (en) * 1968-01-08 1971-06-28 Hydro Conduit Corp Wrapped tubular concrete pipe
BE792348A (en) * 1971-12-28 1973-03-30 Uss Eng & Consult PROCESS FOR BINDING SEALS IN METAL TUBES
NL169756C (en) * 1972-09-01 1982-08-16 Estel Hoogovens Bv COMPENSATOR SECTION FOR A HOTWIND PIPE.
US4010775A (en) * 1975-01-15 1977-03-08 Consolidated Controls Corporation High temperature valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1119469A (en) * 1966-06-14 1968-07-10 Euratom Nuclear reactor cooling duct or pressure tube with solid internal insulation
DE1804143A1 (en) * 1968-10-19 1970-04-30 Arnold Hellmut Compound ceramic/metal pipe having improved shock - absorbing poperties
DE2243995A1 (en) * 1971-09-09 1973-03-15 Commissariat Energie Atomique METHOD AND DEVICE FOR HEAT INSULATION AT HIGH TEMPERATURE

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0096791A1 (en) * 1982-06-11 1983-12-28 INTERATOM Gesellschaft mit beschränkter Haftung Insulation for a hot gas pipe conduit
EP0148434A1 (en) * 1983-12-21 1985-07-17 INTERATOM Gesellschaft mit beschränkter Haftung Container for hot gases with an insulation lining made of overlapping appliances
US4732177A (en) * 1983-12-21 1988-03-22 Interatom Gmbh Hot gas container with insulation formed of overlapping ceramic bodies
EP0334010A1 (en) * 1988-03-19 1989-09-27 MAN Gutehoffnungshütte Aktiengesellschaft Thermally insulated pipeline
EP0441025A2 (en) * 1989-11-07 1991-08-14 The Babcock & Wilcox Company Conduit
EP0441025A3 (en) * 1989-11-07 1991-10-23 The Babcock & Wilcox Company Conduit
TR26228A (en) * 1989-11-07 1995-02-15 Babcock & Wilcox Co EXPERIENCED PIPE PRODUCTION
FR2894316A1 (en) 2005-12-05 2007-06-08 Commissariat Energie Atomique HOT GAS TRANSPORT DRIVING ELEMENT AND METHOD FOR PRODUCING SUCH A COMPONENT
WO2007065835A1 (en) 2005-12-05 2007-06-14 Commissariat A L'energie Atomique Insulating element for a pipe for transporting hot gases, and method of implementing such a pipe
US8276621B2 (en) 2005-12-05 2012-10-02 Commissariat A L'energie Atomique Element for a pipe for transporting hot gases and method of fabricating said element

Also Published As

Publication number Publication date
DE2733611C2 (en) 1982-10-14
DE2733611A1 (en) 1979-02-01
EP0000497B1 (en) 1981-01-07
US4259993A (en) 1981-04-07

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