EP2390567A1 - Device for producing fixture units for steam generator pipes - Google Patents
Device for producing fixture units for steam generator pipes Download PDFInfo
- Publication number
- EP2390567A1 EP2390567A1 EP10164426A EP10164426A EP2390567A1 EP 2390567 A1 EP2390567 A1 EP 2390567A1 EP 10164426 A EP10164426 A EP 10164426A EP 10164426 A EP10164426 A EP 10164426A EP 2390567 A1 EP2390567 A1 EP 2390567A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- steam generator
- shaft
- grooves
- tubes
- template
- 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.)
- Ceased
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
- B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F3/00—Coiling wire into particular forms
- B21F3/02—Coiling wire into particular forms helically
- B21F3/04—Coiling wire into particular forms helically externally on a mandrel or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F3/00—Coiling wire into particular forms
- B21F3/02—Coiling wire into particular forms helically
- B21F3/06—Coiling wire into particular forms helically internally on a hollow form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B29/00—Steam boilers of forced-flow type
- F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
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- 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
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- 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
- F22B37/101—Tubes having fins or ribs
- F22B37/103—Internally ribbed tubes
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- 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
- F22B37/18—Inserts, e.g. for receiving deposits from water
Definitions
- the invention relates to a method for producing steam generator tubes.
- a steam generator is a closed, heated vessel or piping system designed to produce high pressure, high temperature steam for heating and service purposes (eg, for operation of a steam turbine).
- water tube boilers are used, in which the flow medium - usually water - is located in steam generator tubes.
- solid combustion water tube boilers are used, since the combustion chamber, in which the heat is generated by combustion of the respective raw material, can be arbitrarily designed by the arrangement of pipe walls.
- Such a steam generator in the design of a water tube boiler thus comprises a combustion chamber, the surrounding wall is at least partially formed of tube walls, ie gas-tight welded steam generator tubes.
- these steam generator tubes form, as evaporator heating surfaces, first an evaporator, into which the unevaporated medium is introduced and evaporated.
- the evaporator is usually arranged in the hottest region of the combustion chamber. He is downstream of the flow medium side, where appropriate, a device for separating water and steam and a superheater, in which the steam is heated beyond its evaporation temperature to continue to heat in a following heat engine such.
- the evaporator can be upstream of the flow medium side, a preheater (a so-called economizer), which preheats the feed water by utilizing waste or residual heat and so also increases the efficiency of the entire system.
- the internal ribbing of the tubes is produced according to the prior art in a cold drawing process. According to current knowledge, internally ribbed pipes can only be produced with materials with a maximum chromium content of 5%. If the use of innenberippten pipes made of higher chromium alloyed steels required, such. B. by a further increase in steam parameters to increase the efficiency, so the innenberippten pipes can not be produced with the currently available processes.
- the invention is therefore based on the object to provide a method for the production of steam generator tubes, which allows a technically particularly simple manufacturing process and at the same time a particularly high flexibility in terms of usable materials to achieve a particularly high efficiency of a steam generator allowed.
- the invention is based on the consideration that a particularly high flexibility in terms of usable materials could be achieved that the innenberippten pipes are not produced in an integrated manufacturing process, but rather a subsequent introduction of swirl-producing installation bodies should be made in smooth tubes.
- the materials of steam generator tubes and bodies can be selected independently.
- a particularly simple production of the installation body can be achieved by means of a template shaft. In the template shaft, a negative shape of the mounting body is introduced, so that the manufacture of the mounting body can be done by mere molding.
- Such a template shaft additionally enables a particularly simple mounting of the installation body in steam generator tubes, by fixing the installation body on the template shaft, inserting it with the molded installation body into the steam generator tube, releasing the fixation there, and removing the template shaft from the steam generator tube.
- the mounting body is fixed to the stencil shaft with a bias voltage.
- a bias voltage By such a bias voltage, it is possible that the mounting body lifts after loosening the fixation on the stencil shaft from the grooves of the stencil shaft and so automatically fixed in the steam generator tube, without further manual fixation would be required.
- a number of grooves are spirally introduced into the stencil shaft.
- Such a template shaft naturally generates a spiral-shaped installation body, which is particularly well suited for swirl generation in the flow medium.
- the stencil shaft is rotated after releasing the fixation of the mounting body and stencil shaft from the steam generator tube. This is possible because of the symmetry of the spiral and simplifies the removal of the template shaft from the steam generator tube provided with the installation body. This allows an even simpler manufacturing process of a innenberippten steam generator tube.
- the grooves of the template shaft are made conical.
- the conical design ensures easier assembly and reverse rotation of the stencil shaft when removed from the steam generator tube.
- the mounting body comprises a number of wires.
- the installation body By the manufacture of the installation body by means of a template shaft, which comprises a number of grooves, namely, the installation body can be made in a particularly simple manner by corresponding shaping of wires in the grooves. This means both a particularly cost-effective and technically simple production of an installation body for a steam generator tube.
- a steam generator tube produced by the method described above is used in a steam generator.
- the advantages achieved by the invention are in particular that by introducing a mounting body into a steam generator tube by means of a template shaft now a particularly simple technical solution for the production and Positioning of an installation body is present, which makes it possible to produce by means of an installation body innenberippte pipes made of higher chromium alloyed steels, which are suitable for particularly high steam parameters and thus a particularly high efficiency of a steam generator.
- the manufacture of the installation body can be realized in a particularly cost-effective manner since the template shaft is again completely rotated out of the pipe and can be used for the production of the next installation body.
- the significant cost advantages over cold drawn inner fin tubes make the fabrication method of the present invention attractive even for materials with less than 5% chromium.
- the mounting body has low tolerances with respect to its geometry in the assembled state.
- the template shaft further no cross braces or similar auxiliary devices are necessary to ensure the desired geometry of the spin fit body in the mounted state.
- Spin build-up bodies can be produced with the aid of a template shaft in commercially available lengths (for example 12 m).
- FIG. 1 shows a stencil shaft 1, which is provided in a main region 2 with spiral circumferential grooves 4.
- the grooves 4 are in this case arranged in the manner of a triple helix around the cylindrical body of the template shaft 1.
- the grooves 4 can also be configured as a helix with virtually any number.
- the desired grooves 4 can be made individually, for example by means of a machining operation (number, pitch, dimensions).
- the length of the main area 2 of the template shaft 1 is slightly longer than the smooth tube into which the installation body is to be introduced.
- the main area 2 of the template shaft 1 is adjoined in the axial direction by a connection area 6, which is not provided with grooves 4 and serves to handle the template shaft 1 during the method according to the invention.
- FIG. 2 shows the stencil shaft 1 in section in an enlarged view.
- the profile of the introduced into the template shaft 1 grooves 4 can be seen.
- the grooves 4 have a conical profile. Such a profile allows a simpler joining and reverse rotation of the template shaft 1 in the manufacturing process of the non-illustrated mounting body for a steam generator tube.
- FIG. 3 shows schematically the individual steps of the manufacturing method according to the invention.
- step A one or more wires are inserted therein, depending on the number of grooves 4 inserted in the template shaft 1. Thus, the single or multiple-start swirl body is created.
- step B the wire or wires are biased to the stencil shaft 1.
- step C the stencil shaft 1 is inserted into a steam generator tube which is smooth on the inside, and the installation body is thus positioned in the steam generator tube.
- step D the fixation of the mounting body made of wires to the stencil shaft 1 is released.
- step E the release of the fixation leads to a lifting of the mounting body of the grooves 4.
- step E the stencil shaft 1 is helically twisted out of the steam generator tube along the spiral grooves 4. This is supported by the conical shape of the grooves 4.
- the mounting body of the template shaft 1 dissolves and is supported by the internal stress supported firmly against the inner wall of the steam generator tube.
- the stencil shaft 1 is completely rotated out of the pipe and can be used in step F for the production of the next installation body.
- the continuous steam generator 10 is in standing construction and designed as a two-pass steam generator. It has a surrounding wall 12, which merges into a funnel-shaped bottom 14 at the lower end of the first throttle cable formed by it.
- the enclosure wall 12 is constructed of evaporator tubes 16 in a lower region or evaporator region and of superheater tubes 16 'in an upper region or superheater region.
- the evaporator tubes 16 and the superheater tubes 16 ' are gas-tightly connected to each other at their longitudinal sides, for example, welded.
- the bottom 14 comprises a not shown discharge opening 18 for ashes.
- the evaporator tubes 16 of the surrounding wall 12 which can be flowed through from below to above by a flow medium, in particular water or a water-steam mixture, are connected with their inlet ends to an inlet header 20.
- the evaporator tubes 16 are connected via a not-shown Wasserabscheidesystem to the flow medium side subsequent superheater tubes 16 '.
- the evaporator tubes 16 of the enclosure wall 12 form in which between the inlet header 20 and the Wasserabscheidesystem An after-heater or superheater heating surface 24 formed by the superheater tubes 16 'adjoins this section of the throttle cable.
- each opening 32 of the perimeter wall 12 At the bottom of the perimeter wall 12, a number of fossil fuel burners are mounted in each opening 32 of the perimeter wall 12. In FIG. 1 four openings 32 are visible. At such an opening 32, the evaporator tubes 16 of the surrounding wall 12 are curved to bypass the respective opening 32 and extend on the outside of the vertical throttle cable. These openings can also be provided, for example, for air nozzles.
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen von Dampferzeugerrohren.The invention relates to a method for producing steam generator tubes.
Ein Dampferzeuger ist ein geschlossenes, beheiztes Gefäß oder ein Druckrohrsystem, das dem Zweck dient, Dampf von hohem Druck und hoher Temperatur für Heiz- und Betriebszwecke (z. B. zum Betrieb einer Dampfturbine) zu erzeugen. Bei besonders hohen Dampfleistungen und -drücken wie beispielsweise bei der Energieerzeugung in Kraftwerken werden dabei Wasserrohrkessel eingesetzt, bei denen sich das Strömungsmedium - üblicherweise Wasser - in Dampferzeugerrohren befindet. Auch bei der Feststoffverbrennung kommen Wasserrohrkessel zum Einsatz, da die Brennkammer, in der die Wärmeerzeugung durch Verbrennung des jeweiligen Rohstoffes erfolgt, beliebig durch die Anordnung von Rohrwänden gestaltet werden kann.A steam generator is a closed, heated vessel or piping system designed to produce high pressure, high temperature steam for heating and service purposes (eg, for operation of a steam turbine). At particularly high steam outputs and pressures such as in power generation in power plants water tube boilers are used, in which the flow medium - usually water - is located in steam generator tubes. Also in the solid combustion water tube boilers are used, since the combustion chamber, in which the heat is generated by combustion of the respective raw material, can be arbitrarily designed by the arrangement of pipe walls.
Ein derartiger Dampferzeuger in der Bauart eines Wasserrohrkessels umfasst somit eine Brennkammer, deren Umfassungswand zumindest teilweise aus Rohrwänden, d. h. gasdicht verschweißten Dampferzeugerrohren gebildet ist. Strömungsmediumsseitig bilden diese Dampferzeugerrohre als Verdampferheizflächen zunächst einen Verdampfer, in den unverdampftes Medium eingeleitet und verdampft wird. Der Verdampfer ist dabei üblicherweise im heißesten Bereich der Brennkammer angeordnet. Ihm ist strömungsmediumsseitig gegebenenfalls eine Einrichtung zum Abscheiden von Wasser und Dampf und ein Überhitzer nachgeschaltet, in dem der Dampf über seine Verdampfungstemperatur hinaus weiter erhitzt wird, um in einer folgenden Wärmekraftmaschine wie z. B. einer Dampfturbine einen hohen Wirkungsgrad zu erzielen. Dem Verdampfer kann strömungsmediumsseitig ein Vorwärmer (ein so genannter Economiser) vorgeschaltet sein, der das Speisewasser unter Ausnutzung von Ab- oder Restwärme vorwärmt und so ebenfalls den Wirkungsgrad der Gesamtanlage erhöht.Such a steam generator in the design of a water tube boiler thus comprises a combustion chamber, the surrounding wall is at least partially formed of tube walls, ie gas-tight welded steam generator tubes. On the flow medium side, these steam generator tubes form, as evaporator heating surfaces, first an evaporator, into which the unevaporated medium is introduced and evaporated. The evaporator is usually arranged in the hottest region of the combustion chamber. He is downstream of the flow medium side, where appropriate, a device for separating water and steam and a superheater, in which the steam is heated beyond its evaporation temperature to continue to heat in a following heat engine such. B. a steam turbine to achieve high efficiency. The evaporator can be upstream of the flow medium side, a preheater (a so-called economizer), which preheats the feed water by utilizing waste or residual heat and so also increases the efficiency of the entire system.
Für Verdampferheizflächen in Dampferzeugern werden Glattrohre oder innenberippte Rohre eingesetzt. Innenberippte Rohre kommen dann zur Anwendung, wenn der Strömung des Strömungsmediums in den Dampferzeugerrohren ein Drall aufgezwungen werden soll, welcher eine höhere Geschwindigkeit des Fluids an der Innenfläche der Dampferzeugerrohre bewirkt. Der Einsatz von innenberippten Rohren kann dabei aus verschiedenen Gründen erforderlich werden, so z. B. bei einer niedrigen Massenstromdichte des Verdampfers unter Volllast. Auch bei hohen Wärmestromdichten kann die Verwendung von innenberippten Rohren erforderlich sein (z. B. in Trommelkesseln): Hier besteht die Gefahr von Filmsieden, d. h., es bildet sich auf der Innenseite der Dampferzeugerrohre ein Dampffilm, der im Gegensatz zur gut durchmischten Flüssigkeit beim Blasensieden eine hohe wärmeisolierende Wirkung hat. Dies hat zur Folge, dass bei gleich bleibender Wärmestromdichte die Wandtemperatur stark ansteigen kann, was zur Zerstörung der Heizflächen führen kann. Nicht zuletzt kann durch innenberippte Rohre eine Strömungsschichtung (Trennung der Wasser- und der Dampfphase) im normalen Lastbetrieb vermieden werden (so z. B. bei Mindestlast in spiralberohrten Dampferzeugern).For evaporator heating surfaces in steam generators, smooth tubes or internally ribbed tubes are used. Internally ribbed tubes are used when it is desired to impose a spin on the flow of the flow medium in the steam generator tubes, which causes a higher velocity of the fluid on the inner surface of the steam generator tubes. The use of innenberippten pipes can be required for various reasons, such. B. at a low mass flow density of the evaporator under full load. Even at high heat flux densities, the use of internally ribbed pipes may be required (eg in drum boilers): here there is a risk of film boiling, i. h., It forms on the inside of the steam generator tubes, a vapor film, which in contrast to the well-mixed liquid at Blasensieden has a high heat insulating effect. This has the consequence that with constant heat flow density, the wall temperature can rise sharply, which can lead to the destruction of the heating surfaces. Last but not least, inner tubes can be used to avoid flow stratification (separation of the water and vapor phases) during normal load operation (eg at minimum load in spiral-fed steam generators).
Die Innenberippung der Rohre wird nach dem Stand der Technik in einem Kaltziehprozess hergestellt. Nach heutigem Kenntnisstand können innenberippte Rohre nur mit Materialien mit einem maximalen Chromgehalt von 5 % hergestellt werden. Wird der Einsatz von innenberippten Rohren aus höher mit Chrom legierten Stählen erforderlich, so z. B. durch einen weiteren Anstieg der Dampfparameter zur Erhöhung des Wirkungsgrades, so können die innenberippten Rohre mit den heute verfügbaren Prozessen nicht hergestellt werden.The internal ribbing of the tubes is produced according to the prior art in a cold drawing process. According to current knowledge, internally ribbed pipes can only be produced with materials with a maximum chromium content of 5%. If the use of innenberippten pipes made of higher chromium alloyed steels required, such. B. by a further increase in steam parameters to increase the efficiency, so the innenberippten pipes can not be produced with the currently available processes.
Der Erfindung liegt daher die Aufgabe zu Grunde, ein Verfahren zum Herstellen von Dampferzeugerrohren anzugeben, welches einen technisch besonders einfachen Herstellungsprozess ermöglicht und gleichzeitig eine besonders hohe Flexibilität hinsichtlich der verwendbaren Materialien zur Erzielung eines besonders hohen Wirkungsgrades eines Dampferzeugers erlaubt.The invention is therefore based on the object to provide a method for the production of steam generator tubes, which allows a technically particularly simple manufacturing process and at the same time a particularly high flexibility in terms of usable materials to achieve a particularly high efficiency of a steam generator allowed.
Diese Aufgabe wird erfindungsgemäß gelöst, indem ein Einbaukörper in Nuten einer Schablonenwelle fixiert wird, die Schablonenwelle mit dem Einbaukörper in ein Dampferzeugerrohr eingeführt wird, die Fixierung des Einbaukörpers an der Schablonenwelle gelöst wird und die Schablonenwelle wieder aus dem Dampferzeugerrohr entfernt wird.This object is achieved by an installation body is fixed in grooves of a stencil shaft, the stencil shaft is inserted with the mounting body in a steam generator tube, the fixation of the mounting body is released on the stencil shaft and the stencil shaft is removed again from the steam generator tube.
Die Erfindung geht dabei von der Überlegung aus, dass eine besonders hohe Flexibilität hinsichtlich der verwendbaren Materialien dadurch erzielt werden könnte, dass die innenberippten Rohre nicht in einem integrierten Herstellungsprozess hergestellt werden, sondern vielmehr ein nachträgliches Einbringen von drallerzeugenden Einbaukörpern in glatte Rohre erfolgen sollte. Dadurch können die Materialien von Dampferzeugerrohren und Einbaukörpern unabhängig voneinander ausgewählt werden. Eine besonders einfache Herstellung des Einbaukörpers kann dabei mit Hilfe einer Schablonenwelle erreicht werden. In die Schablonenwelle ist eine negative Form des Einbaukörpers eingebracht, so dass die Herstellung des Einbaukörpers durch bloßes Anformen erfolgen kann. Eine derartige Schablonenwelle ermöglicht zusätzlich eine besonders einfache Montage des Einbaukörpers in Dampferzeugerrohren, indem der Einbaukörper auf der Schablonenwelle fixiert wird, diese mit dem angeformten Einbaukörper in das Dampferzeugerrohr eingeführt wird, die Fixierung dort gelöst wird und die Schablonenwelle wieder aus dem Dampferzeugerrohr entfernt wird.The invention is based on the consideration that a particularly high flexibility in terms of usable materials could be achieved that the innenberippten pipes are not produced in an integrated manufacturing process, but rather a subsequent introduction of swirl-producing installation bodies should be made in smooth tubes. As a result, the materials of steam generator tubes and bodies can be selected independently. A particularly simple production of the installation body can be achieved by means of a template shaft. In the template shaft, a negative shape of the mounting body is introduced, so that the manufacture of the mounting body can be done by mere molding. Such a template shaft additionally enables a particularly simple mounting of the installation body in steam generator tubes, by fixing the installation body on the template shaft, inserting it with the molded installation body into the steam generator tube, releasing the fixation there, and removing the template shaft from the steam generator tube.
In vorteilhafter Ausgestaltung des Verfahrens wird der Einbaukörper an der Schablonenwelle mit einer Vorspannung fixiert. Durch eine derartige Vorspannung ist es möglich, dass sich der Einbaukörper nach Lösen der Fixierung an der Schablonenwelle aus den Nuten der Schablonenwelle abhebt und so selbstständig im Dampferzeugerrohr fixiert, ohne dass eine weitere manuelle Fixierung erforderlich wäre.In an advantageous embodiment of the method, the mounting body is fixed to the stencil shaft with a bias voltage. By such a bias voltage, it is possible that the mounting body lifts after loosening the fixation on the stencil shaft from the grooves of the stencil shaft and so automatically fixed in the steam generator tube, without further manual fixation would be required.
In weiterer vorteilhafter Ausgestaltung ist eine Anzahl von Nuten spiralförmig in die Schablonenwelle eingebracht. Eine derartige Schablonenwelle erzeugt auf natürliche Weise einen spiralförmigen Einbaukörper, welcher besonders gut für eine Drallerzeugung im Strömungsmedium geeignet ist.In a further advantageous embodiment, a number of grooves are spirally introduced into the stencil shaft. Such a template shaft naturally generates a spiral-shaped installation body, which is particularly well suited for swirl generation in the flow medium.
In zusätzlicher vorteilhafter Ausgestaltung wird die Schablonenwelle nach dem Lösen der Fixierung von Einbaukörper und Schablonenwelle aus dem Dampferzeugerrohr gedreht. Dies ist auf Grund der Symmetrie der Spirale möglich und vereinfacht die Entfernung der Schablonenwelle aus dem mit dem Einbaukörper versehenen Dampferzeugerrohr. Dies ermöglicht einen noch einfacheren Herstellungsprozess eines innenberippten Dampferzeugerrohrs.In an additional advantageous embodiment, the stencil shaft is rotated after releasing the fixation of the mounting body and stencil shaft from the steam generator tube. This is possible because of the symmetry of the spiral and simplifies the removal of the template shaft from the steam generator tube provided with the installation body. This allows an even simpler manufacturing process of a innenberippten steam generator tube.
Vorteilhafterweise sind dabei die Nuten der Schablonenwelle konisch ausgeführt. Die konische Ausführung gewährleistet ein einfacheres Fügen und Rückwärtsdrehen der Schablonenwelle beim Entfernen aus dem Dampferzeugerrohr.Advantageously, the grooves of the template shaft are made conical. The conical design ensures easier assembly and reverse rotation of the stencil shaft when removed from the steam generator tube.
In besonders vorteilhafter Ausgestaltung umfasst der Einbaukörper ein Anzahl von Drähten. Durch die Herstellung des Einbaukörpers mittels einer Schablonenwelle, welche eine Anzahl von Nuten umfasst, kann nämlich der Einbaukörper in besonders einfacher Weise durch entsprechendes Formen von Drähten in die Nuten gefertigt werden. Dies bedeutet sowohl eine besonders kostengünstige als auch technisch einfache Herstellung eines Einbaukörpers für ein Dampferzeugerrohr.In a particularly advantageous embodiment, the mounting body comprises a number of wires. By the manufacture of the installation body by means of a template shaft, which comprises a number of grooves, namely, the installation body can be made in a particularly simple manner by corresponding shaping of wires in the grooves. This means both a particularly cost-effective and technically simple production of an installation body for a steam generator tube.
In vorteilhafter Ausgestaltung kommt ein nach dem oben beschriebenen Verfahren hergestelltes Dampferzeugerrohr in einem Dampferzeuger zum Einsatz.In an advantageous embodiment, a steam generator tube produced by the method described above is used in a steam generator.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass durch das Einbringen eines Einbaukörpers in ein Dampferzeugerrohr mittels einer Schablonenwelle nunmehr eine besonders einfache technische Lösung zur Herstellung und Positionierung eines Einbaukörpers vorliegt, die es ermöglicht, mittels eines Einbaukörpers innenberippte Rohre aus höher mit Chrom legierten Stählen herzustellen, die sich für besonders hohe Dampfparameter und somit einen besonders hohen Wirkungsgrad eines Dampferzeugers eignen. Die Herstellung des Einbaukörpers kann so besonders kostengünstig realisiert werden, da die Schablonenwelle wieder vollständig aus dem Rohr heraus gedreht wird und für die Herstellung des nächsten Einbaukörpers verwendet werden kann. Die signifikanten Kostenvorteile gegenüber kalt gezogenen Rohren mit Innenrippen machen das erfindungsgemäße Herstellungsverfahren auch bei Materialien mit weniger als 5 % Chrom attraktiv.The advantages achieved by the invention are in particular that by introducing a mounting body into a steam generator tube by means of a template shaft now a particularly simple technical solution for the production and Positioning of an installation body is present, which makes it possible to produce by means of an installation body innenberippte pipes made of higher chromium alloyed steels, which are suitable for particularly high steam parameters and thus a particularly high efficiency of a steam generator. The manufacture of the installation body can be realized in a particularly cost-effective manner since the template shaft is again completely rotated out of the pipe and can be used for the production of the next installation body. The significant cost advantages over cold drawn inner fin tubes make the fabrication method of the present invention attractive even for materials with less than 5% chromium.
Durch die Verwendung einer Schablone in Form von Nuten auf einer Schablonenwelle hat der Einbaukörper geringe Toleranzen in Bezug auf seine Geometrie im montierten Zustand. Durch die Montage mit der Schablonenwelle sind weiterhin keine Querstreben oder ähnliche Hilfseinrichtungen nötig, um die gewünschte Geometrie des Dralleinbaukörpers im montierten Zustand zu gewährleisten. Dralleinbaukörper sind mit Hilfe einer Schablonenwelle in handelsüblichen Längen (z. B. 12 m) herstellbar.By using a template in the form of grooves on a template shaft, the mounting body has low tolerances with respect to its geometry in the assembled state. By mounting with the template shaft further no cross braces or similar auxiliary devices are necessary to ensure the desired geometry of the spin fit body in the mounted state. Spin build-up bodies can be produced with the aid of a template shaft in commercially available lengths (for example 12 m).
Die Erfindung wird anhand einer Zeichnung näher erläutert. Darin zeigen:
-
FIG 1 eine Schablonenwelle zur Ausführung des erfindungsgemäßen Verfahrens, -
FIG 2 eine vergrößerte Darstellung der Schablonenwelle im Schnitt, -
FIG 3 ein Flussdiagramm des erfindungsgemäßen Verfahrens, und -
FIG 4 schematisch einen Durchlaufdampferzeuger in stehender Bauweise.
-
FIG. 1 a template shaft for carrying out the method according to the invention, -
FIG. 2 an enlarged view of the template shaft in section, -
FIG. 3 a flow chart of the method according to the invention, and -
FIG. 4 schematically a continuous steam generator in standing construction.
Gleiche Teile sind in allen Figuren mit denselben Bezugszeichen versehen.Identical parts are provided with the same reference numerals in all figures.
In Schritt D wird die Fixierung des Einbaukörpers aus Drähten an der Schablonenwelle 1 gelöst. Durch die vorherige Fixierung mit Vorspannung in Schritt B führt das Lösen der Fixierung zu einem Abheben des Einbaukörpers aus den Nuten 4. In Schritt E wird die Schablonenwelle 1 entlang der spiralförmigen Nuten 4 schraubenartig aus dem Dampferzeugerrohr ausgedreht. Dies wird durch die konische Form der Nuten 4 unterstützt. Durch das Lösen der Fixierung und über das Rückdrehen der Schablonenwelle 1 löst sich der Einbaukörper von der Schablonenwelle 1 und legt sich durch die Eigenspannung unterstützt fest an die Innenwand des Dampferzeugerrohrs an. Die Schablonenwelle 1 wird vollständig aus dem Rohr heraus gedreht und kann in Schritt F für die Herstellung des nächsten Einbaukörpers verwendet werden.In step D, the fixation of the mounting body made of wires to the stencil shaft 1 is released. By the previous fixation with bias in step B, the release of the fixation leads to a lifting of the mounting body of the
Der Durchlaufdampferzeuger 10 gemäß
Die von einem Strömungsmedium, insbesondere von Wasser oder einem Wasser-Dampf-Gemisch, von unten nach oben durchströmbaren Verdampferrohre 16 der Umfassungswand 12 sind mit ihren Eintrittsenden an einen Eintrittssammler 20 angeschlossen. Austrittsseitig sind die Verdampferrohre 16 über ein nicht näher gezeigtes Wasserabscheidesystem an die strömungsmediumsseitig nachfolgenden Überhitzerrohre 16' angeschlossen.The
Die Verdampferrohre 16 der Umfassungswand 12 bilden in dem sich zwischen dem Eintrittssammler 20 und dem Wasserabscheidesystem befindenden Abschnitt des Gaszugs eine Verdampferheizfläche 22. An diese schließt sich eine von den Überhitzerrohren 16' gebildete Nach- oder Überhitzerheizfläche 24 an. Zusätzlich sind im zweiten, von den Heizgasen abwärts durchströmten Gaszug 26 und in dem diesen heizgasseitig mit dem ersten Gaszug verbindenden Querzug 28 noch weitere, lediglich schematisch dargestellte Heizflächen 30, beispielsweise ein Economizer und konvektive Überhitzerheizflächen, angeordnet.The
Im unteren Bereich der Umfassungswand 12 ist eine Anzahl von Brennern für einen fossilen Brennstoff in jeweils einer Öffnung 32 der Umfassungswand 12 angebracht. In
Durch die Verwendung von innenberippten Dampferzeugerrohren, die nach dem dargestellten Verfahren hergestellt wurden, im Dampferzeuger 10 ist es möglich, auch Stähle mit einem Chromgehalt von mehr als 5 % zur Herstellung zu verwenden. Derartige Dampferzeugerrohre sind für besonders hohe Dampfparameter geeignet und ermöglichen so einen besonders hohen Wirkungsgrad eines Dampferzeugers.By using internal finned steam generator tubes made by the illustrated method in the
Claims (8)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10164426A EP2390567A1 (en) | 2010-05-31 | 2010-05-31 | Device for producing fixture units for steam generator pipes |
PL11723314T PL2577160T3 (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
US13/697,871 US20130087106A1 (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
KR1020127031219A KR20130090765A (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
PCT/EP2011/057426 WO2011151135A2 (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
CN2011800268147A CN102933899A (en) | 2010-05-31 | 2011-05-09 | Device for producing fixture units for steam generator pipes |
EP11723314.8A EP2577160B1 (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
AU2011260510A AU2011260510B2 (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
JP2013512811A JP2013532267A (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generating pipe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10164426A EP2390567A1 (en) | 2010-05-31 | 2010-05-31 | Device for producing fixture units for steam generator pipes |
Publications (1)
Publication Number | Publication Date |
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EP2390567A1 true EP2390567A1 (en) | 2011-11-30 |
Family
ID=43536619
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10164426A Ceased EP2390567A1 (en) | 2010-05-31 | 2010-05-31 | Device for producing fixture units for steam generator pipes |
EP11723314.8A Active EP2577160B1 (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11723314.8A Active EP2577160B1 (en) | 2010-05-31 | 2011-05-09 | Method for producing steam generator tubes |
Country Status (8)
Country | Link |
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US (1) | US20130087106A1 (en) |
EP (2) | EP2390567A1 (en) |
JP (1) | JP2013532267A (en) |
KR (1) | KR20130090765A (en) |
CN (1) | CN102933899A (en) |
AU (1) | AU2011260510B2 (en) |
PL (1) | PL2577160T3 (en) |
WO (1) | WO2011151135A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102012219898A1 (en) | 2012-10-31 | 2014-04-30 | Siemens Aktiengesellschaft | Resistance spot welding machine |
WO2018007036A1 (en) | 2016-07-07 | 2018-01-11 | Siemens Aktiengesellschaft | Steam generator pipe having a turbulence installation body |
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- 2011-05-09 KR KR1020127031219A patent/KR20130090765A/en not_active Application Discontinuation
- 2011-05-09 EP EP11723314.8A patent/EP2577160B1/en active Active
- 2011-05-09 CN CN2011800268147A patent/CN102933899A/en active Pending
- 2011-05-09 US US13/697,871 patent/US20130087106A1/en not_active Abandoned
- 2011-05-09 WO PCT/EP2011/057426 patent/WO2011151135A2/en active Application Filing
- 2011-05-09 AU AU2011260510A patent/AU2011260510B2/en not_active Ceased
- 2011-05-09 PL PL11723314T patent/PL2577160T3/en unknown
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Also Published As
Publication number | Publication date |
---|---|
CN102933899A (en) | 2013-02-13 |
AU2011260510B2 (en) | 2014-03-20 |
EP2577160B1 (en) | 2020-07-15 |
US20130087106A1 (en) | 2013-04-11 |
KR20130090765A (en) | 2013-08-14 |
AU2011260510A1 (en) | 2012-11-15 |
WO2011151135A3 (en) | 2012-10-11 |
WO2011151135A2 (en) | 2011-12-08 |
PL2577160T3 (en) | 2020-12-14 |
EP2577160A2 (en) | 2013-04-10 |
JP2013532267A (en) | 2013-08-15 |
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