EP0307943A1 - Device to introduce a tool to a heat exchanger - Google Patents

Device to introduce a tool to a heat exchanger Download PDF

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Publication number
EP0307943A1
EP0307943A1 EP88115221A EP88115221A EP0307943A1 EP 0307943 A1 EP0307943 A1 EP 0307943A1 EP 88115221 A EP88115221 A EP 88115221A EP 88115221 A EP88115221 A EP 88115221A EP 0307943 A1 EP0307943 A1 EP 0307943A1
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EP
European Patent Office
Prior art keywords
yoke
fingers
clamping
heat exchanger
tensioning
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.)
Withdrawn
Application number
EP88115221A
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German (de)
French (fr)
Inventor
Bernd Dipl.-Ing. Richter
Ulrich Rittler
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.)
Siemens AG
Original Assignee
Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0307943A1 publication Critical patent/EP0307943A1/en
Withdrawn legal-status Critical Current

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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
    • F22B37/002—Component parts or details of steam boilers specially adapted for nuclear steam generators, e.g. maintenance, repairing or inspecting equipment not otherwise provided for
    • F22B37/003—Maintenance, repairing or inspecting equipment positioned in or via the headers
    • F22B37/005—Positioning apparatus specially adapted therefor

Definitions

  • the invention relates to a device and a method for introducing and / or positioning a device, in particular a manipulator, into a chamber of a heat exchanger.
  • a test device for the tubes of a heat exchanger is known, which is assigned a device for introduction into the chamber of the heat exchanger accessible through a manhole.
  • This device comprises a rail with a slide movable thereon so that testing and repair devices in the form of probes, which are supplied with a hose, can be brought to the tube plate of the heat exchanger.
  • a flange is used to fasten the rail, which is screwed to the manhole.
  • the end of the rail projecting into the chamber of the heat exchanger is fixed to the tube sheet by at least one centering mandrel. Due to the rail leading into the chamber and its holder, the clear width of the manhole is narrowed, so that larger devices are very difficult to insert.
  • the invention has for its object to provide a device for inserting and / or positioning a device in / in the chamber of a heat exchanger, with which a simple and quick insertion, in particular a manipulator, is possible without the free opening of the manhole noticeable is narrowed. Furthermore, a method for introducing and / or positioning a device in / in a heat exchanger with restricted access paths is to be specified.
  • the first-mentioned object is achieved according to the invention by a device in which at least three remotely operable clamping fingers are arranged on a mounting yoke that can be manually inserted into the chamber with a mounting rod and locked in heat exchanger tubes, of which a clamping finger is arranged at least approximately in the middle of the yoke with the interposition of a lifting cylinder and of which at least one additional tension finger is detachably held on the two yoke ends by means of a remotely operable clamping device, the end of a toothed belt being connected to the further tension fingers arranged on the yoke ends and the toothed belts being in engagement with a toothed belt transmission of two synchronously controllable elevators, on which support elements and releasable connecting means for the device are arranged.
  • an operator only needs to insert a relatively light yoke with the mounting rod - without entering the chamber - from the outside through the manhole into the chamber, bringing it to the tube plate and the central clamping finger - without looking into the chamber - to be inserted into any heat exchanger tube and to be braced by remote control.
  • the lifting cylinder of the central clamping finger can be rotatably mounted on the mounting yoke. This makes it possible to bring the assembly yoke into a desired position on the tube sheet before bracing the additional tension fingers arranged at the ends (for example by means of the assembly rod).
  • the clamping fingers arranged at the ends of the mounting yoke can then be inserted into a heat exchanger tube. They are then clamped in it, by means of the associated remote-controlled spreading or tensioning devices.
  • Alignment of the yoke can advantageously also be carried out remotely if the piston rod of the lifting cylinder is connected to an electric drive motor via a mechanical transmission.
  • the yoke can be removed by loosening the clamping devices of the (still tensioned) tensioning fingers located on the yoke ends and the expanding or tensioning device of the centrally arranged tensioning fingers. It can be removed with the assembly rod so that only the two tension fingers with the toothed belt remain clamped in the heat exchanger tubes.
  • the device to be inserted into the chamber is then retracted onto this toothed belt with the aid of the toothed belt transmission and clamped in the heat exchanger tubes by means of additional tensioning fingers arranged on the device and by means of associated spreading or tensioning devices.
  • the tensioning fingers with the toothed belt can be removed from the tube sheet after the associated expansion or tensioning devices have been released.
  • a mounting yoke 1 is used to insert a device (e.g. 21 in FIG. 5), in particular a manipulator, into a chamber of a heat exchanger, as shown in FIG. 1.
  • a device e.g. 21 in FIG. 5
  • a manipulator e.g. 21 in FIG. 5
  • At least three remotely operable clamping fingers 2, 3, 4 are arranged on this.
  • the clamping finger 2 is provided centrally and at least approximately in the middle of the yoke.
  • the central clamping finger 2 is rotatably arranged with the interposition of a lifting cylinder 5 with a piston 6 via a piston rod 7 on the yoke 1 via roller bearings 8.
  • the lifting cylinder 5 can be actuated via pressure medium lines 5a, 5b.
  • At least one additional clamping finger 3 or 4 is detachably held by a remotely operable clamping device 9, to which pressure medium lines 9a are guided.
  • the further clamping fingers 3, 4 are detachably connected to the two yoke ends via clamping devices 9.
  • the clamping fingers 2, 3, 4 each have a known clamping device (not designated) for clamping, which is actuated by a pressure medium.
  • the pressure medium is supplied via a pressure medium line 10; it enables the spreading fingers 2, 3, 4 to be individually locked or braced in the heat exchanger tubes 11.
  • a toothed belt 19 or 20 is attached to each of the two further end tensioning fingers or pairs of tensioning fingers.
  • the toothed belts 19 and 20 are in principle on the end tensioning fingers 3 or 4 arranged in any way. They are carried by the tension fingers 3 and 4 when lifting or lowering.
  • FIG. 2 shows a chamber of a heat exchanger 12, the upper side of which is delimited by the tube sheet 11R, into which the heat exchanger tubes 11 open.
  • the underside of the chamber is closed by a hemispherical base 13 in which a manhole 14 is provided.
  • Devices and devices such as manipulator, tools, test devices and the like can be introduced through the manhole 14.
  • the assembly yoke 1 is first inserted (manually) by an operator through the manhole 14 using an assembly rod 15.
  • the middle clamping finger 2 is inserted into an arbitrarily selected heat exchanger tube 11 when the cylinder 5 is extended.
  • the mounting rod 15 has at the free end a remotely operable, in particular actuatable by a pressure medium gripping device 15a, with which it firmly engages around part of the mounting yoke 1, in particular the head of the cylinder 5.
  • An end contact 2a is provided on the central clamping finger 2. This end contact 2a triggers an automatic tensioning of the central clamping finger 2 when the end contact 2a comes to rest on the tube sheet 11R after the insertion of the clamping finger 2 into a heat exchanger tube 11.
  • the mounting yoke 1 is now brought into a desired position on the tube sheet 11R. For this purpose, it is rotated around the central clamping finger 2 in the direction of the tube rows (connecting line of the tube centers in the X direction), ie parallel to the tube lane, until the the two outer clamping fingers 3, 4 or pairs of clamping fingers arranged on the support yoke are under two or four heating tube openings.
  • This can be done using the mounting rod 15.
  • it can also be done via a remotely controllable electric drive motor 16, which is connected to the piston rod 7 of the lifting cylinder 5 via a gear designed as a pinion 17 and gear 18.
  • the clamping fingers 2, 3, 4 are at a mutual distance which is an integral multiple of the distance between two heat exchanger tubes 11. (This also applies to the clamping fingers 22 to 25 described below).
  • End contacts 2a can again be provided on the yoke 1 or on the clamping fingers 3, 4 for automatically triggering the tensioning.
  • the individual clamping fingers 2, 3, 4 can have spreading devices made of rubber or metal, in a known embodiment.
  • the device 21 to be introduced which is designed as a finger walker according to FIG. 5, has a walking mechanism with a number of clamping fingers 22, 23, 24, 25 and supply and control lines which are accommodated in a flexible tube 21a.
  • the device's own clamping fingers 22 to 25 can be used like the clamping fingers 2, 3, 4 be formed; they also have corresponding spreading devices for bracing.
  • the device 21 is releasably attached to two elevators 26, 27, each of which is equipped with a toothed belt transmission 28 and can be controlled synchronously.
  • the toothed belt drives 28 are assigned guides 29 which are tubular. Carrying elements 30a and connecting means 30b for releasably holding the device 21 are arranged on the guides 29.
  • the toothed belt transmissions 28 are connected in a torque-locking manner to synchronously controllable electric drive motors 31, which are connected to electrical supply and control lines 32.
  • the elevators 26, 27, which are designed as electric lifting mechanisms, carry the device 21 through the manhole 14 to below the tube plate 11R until the device's own clamping fingers 22 and 25 protrude sufficiently deep into the heat exchanger tubes 11 and can be clamped there.
  • End contacts 2a can also be provided on the tensioning fingers 22 to 25 of the device 21, each of which triggers an automatic tensioning of the tensioning fingers 22 to 25 after complete insertion.
  • the elevators 26, 27 together with the flexible toothed belts 19, 20 can be removed from the tube sheet 11R by simply releasing the tension fingers 3, 4 and by releasing the connecting means 30b.
  • the device 21 is thus anchored to the tube sheet 11R alone and is in its starting position.
  • the installation and removal process can be carried out by just one person from outside the manhole 14 in a few minutes.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manipulator (AREA)

Abstract

Arranged on a mounting yoke (1), which can be introduced manually into the chamber (12) with a mounting rod (15) and locked in heat exchanger tubes, are at least three remotely operable gripping fingers (2, 3, 4), one gripping finger (2) of which is arranged at least approximately in the centre of the yoke with interposition of a lifting cyliner (5). At least one further gripping finger (3 or 4) in each case is held at the two yoke ends by means of a remotely operable clamping device (9). Connected to each of the further gripping fingers (3, 4) arranged at the yoke ends is a toothed belt (19 or 20). The toothed belts (19, 20) are each in engagement with a toothed belt gear (28) of two synchronously controllable lifts (26, 27) for the remotely operated tool (21) to be introduced or positioned. The tool (21) is preferably likewise equipped with remotely operable gripping fingers (22 to 25). <IMAGE>

Description

Die Erfindung befaßt sich mit einer Vorrichtung und einem Ver­fahren zum Einbringen und/oder Positionieren eines Gerätes, ins­besondere eines Manipulators, in eine(-r) Kammer eines Wärmetau­schers.The invention relates to a device and a method for introducing and / or positioning a device, in particular a manipulator, into a chamber of a heat exchanger.

Aus der DE-A 28 30 306 ist eine Prüfeinrichtung für die Rohre eines Wärmetauschers bekannt, der eine Einrichtung zum Ein­bringen in die durch ein Mannloch zugängliche Kammer des Wärme­tauschers zugeordnet ist. Diese Einrichtung umfaßt eine Schiene mit einem daran beweglichen Schlitten, damit Prüf- und Repara­turgeräte in Gestalt von Sonden, die mit einem Schlauch zuge­führt werden, an den Rohrboden des Wärmetauschers gebracht wer­den können. Bei dieser bekannten Ausführung dient zur Befesti­gung der Schiene ein Flansch, der an dem Mannloch verschraubt wird. Das Ende der in die Kammer des Wärmetauschers ragenden Schiene wird durch mindestens einen Zentrierdorn am Rohrboden fixiert. Durch die in die Kammer führende Schiene und deren Halterung wird die lichte Weite des Mannloches verengt, so daß größere Geräte nur sehr schwer eingebracht werden können.From DE-A 28 30 306 a test device for the tubes of a heat exchanger is known, which is assigned a device for introduction into the chamber of the heat exchanger accessible through a manhole. This device comprises a rail with a slide movable thereon so that testing and repair devices in the form of probes, which are supplied with a hose, can be brought to the tube plate of the heat exchanger. In this known embodiment, a flange is used to fasten the rail, which is screwed to the manhole. The end of the rail projecting into the chamber of the heat exchanger is fixed to the tube sheet by at least one centering mandrel. Due to the rail leading into the chamber and its holder, the clear width of the manhole is narrowed, so that larger devices are very difficult to insert.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Einbringen und/oder Positionieren eines Gerätes in die/in der Kammer eines Wärmetauschers anzugeben, mit der eine einfache und schnelle Einbringung, insbesondere eines Manipulators, möglich ist, ohne daß die freie Öffnung des Mannloches merklich verengt wird. Weiterhin soll ein Verfahren zum Einbringen und/oder Po­sitionieren eines Gerätes in einen/in einem Wärmetauscher mit beengten Zugangswegen angegeben werden.The invention has for its object to provide a device for inserting and / or positioning a device in / in the chamber of a heat exchanger, with which a simple and quick insertion, in particular a manipulator, is possible without the free opening of the manhole noticeable is narrowed. Furthermore, a method for introducing and / or positioning a device in / in a heat exchanger with restricted access paths is to be specified.

Die erstgenannte Aufgabe wird erfindungsgemäß durch eine Vor­richtung gelöst, bei der an einem mit einer Montagestange hän­disch in die Kammer einbringbaren und in Wärmetauscherrohren arretierbaren Montagejoch mindestens drei fernbetätigbare Spann­finger angeordnet sind, von denen ein Spannfinger zumindest an­nähernd in der Jochmitte unter Zwischenschaltung eines Hubzylin­ders angeordnet ist und von denen mindestens je ein weiterer Spannfinger an den beiden Jochenden mittels einer fernbetätig­baren Klemmvorrichtung lösbar festgehalten ist, wobei mit den an den Jochenden angeordneten weiteren Spannfingern jeweils das Ende eines Zahnriemens verbunden ist und die Zahnriemen mit je einem Zahnriemengetriebe zweier synchron steuerbarer Aufzüge im Eingriff stehen, an denen Tragelemente und lösbare Verbindungs­mittel für das Gerät angeordnet sind.The first-mentioned object is achieved according to the invention by a device in which at least three remotely operable clamping fingers are arranged on a mounting yoke that can be manually inserted into the chamber with a mounting rod and locked in heat exchanger tubes, of which a clamping finger is arranged at least approximately in the middle of the yoke with the interposition of a lifting cylinder and of which at least one additional tension finger is detachably held on the two yoke ends by means of a remotely operable clamping device, the end of a toothed belt being connected to the further tension fingers arranged on the yoke ends and the toothed belts being in engagement with a toothed belt transmission of two synchronously controllable elevators, on which support elements and releasable connecting means for the device are arranged.

Bei der Vorrichtung nach der Erfindung braucht eine Bedienungs­person nur ein verhältnismäßig leichtes Joch mit der Montage­stange - ohne die Kammer zu betreten - von außen durch das Mann­loch in die Kammer einzubringen, an den Rohrboden heranzuführen und den zentralen Spannfinger - ohne in die Kammer zu schauen - in ein beliebiges Wärmetauscherrohr einzuführen und durch Fern­steuerung zu verspannen.In the device according to the invention, an operator only needs to insert a relatively light yoke with the mounting rod - without entering the chamber - from the outside through the manhole into the chamber, bringing it to the tube plate and the central clamping finger - without looking into the chamber - to be inserted into any heat exchanger tube and to be braced by remote control.

Es ist günstig, am Spannfinger einen Endkontakt vorzusehen, der ein automatisches Verspannen des zentralen Spannfingers auslöst, wenn der Endkontakt am Rohrboden zur Anlage kommt. Dadurch wird das Anbringen des Joches erheblich erleichtert und beschleunigt.It is expedient to provide an end contact on the clamping finger which triggers an automatic clamping of the central clamping finger when the end contact comes into contact with the tube sheet. This considerably facilitates and accelerates the attachment of the yoke.

Der Hubzylinder des zentralen Spannfingers kann drehbar an dem Montagejoch gelagert sein. Dadurch ist es möglich, das Montage­joch vor dem Verspannen der an den Enden angeordneten weiteren Spannfinger (z.B. mittels der Montagestange) in eine gewünschte Lage am Rohrboden zu bringen. Durch Betätigung des Hubzylinders können dann die an den Enden des Montagejoches angeordneten Spannfinger in je ein Wärmetauscherrohr eingeführt werden. Sie werden danach darin verspannt, und zwar mittels der zugehörigen fernbedienbaren Spreiz- oder Spannvorrichtungen.The lifting cylinder of the central clamping finger can be rotatably mounted on the mounting yoke. This makes it possible to bring the assembly yoke into a desired position on the tube sheet before bracing the additional tension fingers arranged at the ends (for example by means of the assembly rod). By actuating the lifting cylinder, the clamping fingers arranged at the ends of the mounting yoke can then be inserted into a heat exchanger tube. they are then clamped in it, by means of the associated remote-controlled spreading or tensioning devices.

Das Ausrichten des Joches kann in vorteilhafter Weise aber auch fernbedient vorgenommen werden, wenn die Kolbenstange des Hubzy­linders über ein mechanisches Getriebe mit einem elektrischen Antriebsmotor verbunden ist.Alignment of the yoke can advantageously also be carried out remotely if the piston rod of the lifting cylinder is connected to an electric drive motor via a mechanical transmission.

Nach dem Verspannen der mit den Zahnriemen versehenen Spann­finger in den Wärmetauscherrohren ist das Joch durch Lösen der Klemmvorrichtungen der an den Jochenden befindlichen (noch ver­spannten) Spannfinger und der Spreiz- oder Spannvorrichtung des zentral angeordneten Spannfingers abnehmbar. Es kann mit der Montagestange entfernt werden, so daß nur noch die zwei Spann­finger mit den Zahnriemen in den Wärmetauscherrohren verspannt bleiben. An diesen Zahnriemen wird dann das in die Kammer ein­zuführende Gerät mit Hilfe des Zahnriemengetriebes eingefahren und mittels an dem Gerät angeordneter zusätzlicher Spannfinger und mittels zugeordneter Spreiz- oder Spannvorrichtungen in den Wärmetauscherrohren verspannt. Die Spannfinger mit den Zahnrie­men können nach dem Entspannen der zugehörigen Spreiz- oder Spannvorrichtungen von dem Rohrboden entfernt werden.After the tensioning fingers provided with the toothed belts have been tensioned in the heat exchanger tubes, the yoke can be removed by loosening the clamping devices of the (still tensioned) tensioning fingers located on the yoke ends and the expanding or tensioning device of the centrally arranged tensioning fingers. It can be removed with the assembly rod so that only the two tension fingers with the toothed belt remain clamped in the heat exchanger tubes. The device to be inserted into the chamber is then retracted onto this toothed belt with the aid of the toothed belt transmission and clamped in the heat exchanger tubes by means of additional tensioning fingers arranged on the device and by means of associated spreading or tensioning devices. The tensioning fingers with the toothed belt can be removed from the tube sheet after the associated expansion or tensioning devices have been released.

Zum Einbringen und/oder Positionieren eines Gerätes in einem Wärmetauscher ist erfindungsgemäß ein Verfahren vorgesehen, bei dem

  • a) ein Montagejoch, z.B. mittels einer Montagestange, durch ein Mannloch händisch in die Kammer eingebracht wird,
  • b) ein am Montagejoch angebrachter zentraler Spannfinger in ein ausgewähltes Wärmetauscherrohr des Wärmetauschers eingeführt und dort mittels einer Spreizvorrichtung fernbetätigt ver­spannt wird,
  • c) das Montagejoch durch Drehen um den zentralen Spannfinger, z.B. mittels der Montagestange, in eine gewünschte Lage zum Rohrboden gebracht wird,
  • d) das Montagejoch durch Betätigen eines Hubzylinders angehoben wird und an den Enden des Montagejoches angeordnete weitere Spannfinger in je ein weiteres Wärmetauscherrohr eingeführt und dort fernbetätigt mittels weiterer Spreizvorrichtungen verspannt werden, wobei an den weiteren Spannfingern angeord­nete Zahnriemen mitgenommen werden und wobei die weiteren Spannfinger über Klemmvorrichtungen mit den beiden Jochenden verbunden sind,
  • e) das Montagejoch durch Lösen der Klemmvorrichtungen der an den Jochenden verspannten weiteren Spannfinger und der Spreizvor­richtung des zentralen Spannfingers, z.B. mittels der Monta­gestange, vom Rohrboden abgenommen und entfernt wird, wobei die beiden weiteren Spannfinger mit den Zahnriemen am Rohr­boden verbleiben, und
  • f) an den im Rohrboden mittels der weiteren Spannfinger veran­kerten Zahnriemen das Gerät mit Hilfe von Aufzügen in die Kammer eingefahren und mittels am Gerät angeordneter Spann­finger am Rohrboden verspannt wird.
According to the invention, a method is provided for introducing and / or positioning a device in a heat exchanger, in which
  • a) a mounting yoke is manually inserted into the chamber through a manhole, for example by means of a mounting rod,
  • b) a central clamping finger attached to the mounting yoke is inserted into a selected heat exchanger tube of the heat exchanger and is remotely clamped there by means of a spreading device,
  • c) the assembly yoke is brought into a desired position on the tube sheet by rotating around the central clamping finger, for example by means of the assembly rod,
  • d) the assembly yoke is raised by actuating a lifting cylinder and further tension fingers arranged at the ends of the assembly yoke are inserted into another heat exchanger tube and tensioned remotely there by means of further spreading devices, toothed belts arranged on the further tension fingers being carried along and the further tension fingers being clamped are connected to the two yokes
  • e) the assembly yoke is removed and removed from the tube sheet by loosening the clamping devices of the additional tensioning fingers braced on the yoke ends and the expansion device of the central tensioning finger, for example by means of the assembly rod, the two additional tensioning fingers remaining with the toothed belts on the tube sheet, and
  • f) the device is retracted into the chamber on the toothed belts anchored in the tube sheet by means of the additional tensioning fingers and braced on the tube sheet by means of tensioning fingers arranged on the device.

Dabei ist es günstig, das Verfahren so auszugestalten, daß nach dem Verspannen des Gerätes am Rohrboden das Gerät durch Lösen von Verbindungsmitteln von den Aufzügen getrennt wird, daß die Verspannung der weiteren Spannfinger durch die Spreizvorrich­tungen gelöst wird, und daß die weiteren Spannfinger mit den Zahnriemen vom Rohrboden entfernt werden.It is advantageous to design the method so that after the device is braced on the tube sheet, the device is separated from the lifts by loosening connecting means, that the bracing of the further clamping fingers is released by the spreading devices, and that the further clamping fingers with the toothed belt be removed from the tube sheet.

Nach Beendigung der Tätigkeit des Gerätes wird dieses unter Zu­hilfenahme des Montagejoches wieder vom Rohrboden entfernt.After the device has ceased to operate, remove it from the tube sheet with the help of the mounting yoke.

Die Erfindung wird anhand eines in der Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert. Darin zei­gen:

  • FIG 1 ein Montagejoch, das am Rohrboden eines Wärmetauschers an­geordnet ist,
  • FIG 2 das Einbringen des Montagejoches in die Kammer des Wärme­tauschers,
  • FIG 3 das Arretieren des Montagejoches mit an äußeren Spann­fingern angebrachten Zahnriemen,
  • FIG 4 die am Rohrboden durch die äußeren Spannfinger arretierten Zahnriemen nach Abnahme des Montagejoches und
  • FIG 5 das fernbediente Einbringen eines als Manipulator ausge­bildeten Gerätes in die Kammer, und zwar mittels zweier mit den Zahnriemen im Eingriff stehender Aufzüge.
The invention will be explained in more detail with reference to an embodiment shown schematically in the drawing. In it show:
  • 1 shows an assembly yoke which is arranged on the tube sheet of a heat exchanger,
  • 2 shows the insertion of the mounting yoke into the chamber of the heat exchanger,
  • 3 the locking of the mounting yoke with toothed belts attached to the outer tensioning fingers,
  • 4 shows the toothed belt locked on the tube sheet by the outer tensioning fingers after removal of the mounting yoke and
  • 5 shows the remote-controlled introduction of a device designed as a manipulator into the chamber, namely by means of two elevators which are in engagement with the toothed belt.

Zum Einbringen eines Gerätes (z.B. 21 in FIG 5), insbesondere eines Manipulators, in eine Kammer eines Wärmetauschers dient - wie in FIG 1 dargestellt ist - ein Montagejoch 1. An diesem sind mindestens drei fernbetätigbare Spannfinger 2, 3, 4 angeordnet. Der Spannfinger 2 ist zentral und zumindest annähernd in der Jochmitte vorgesehen. Der zentrale Spannfinger 2 ist unter Zwi­schenschaltung eines Hubzylinders 5 mit Kolben 6 über eine Kol­benstange 7 am Joch 1 über Wälzlager 8 drehbar angeordnet. Der Hubzylinder 5 ist über Druckmittelleitungen 5a, 5b betätigbar. An den beiden Jochenden ist mindestens je ein weiterer Spann­finger 3 bzw. 4, insbesondere je ein Spannfingerpaar, durch je eine fernbetätigbare Klemmvorrichtung 9, an die Druckmittellei­tungen 9a herangeführt sind, lösbar gehalten. Mit anderen Wor­ten, die weiteren Spannfinger 3, 4 sind über Klemmvorrichtungen 9 mit den beiden Jochenden lösbar verbunden.A mounting yoke 1 is used to insert a device (e.g. 21 in FIG. 5), in particular a manipulator, into a chamber of a heat exchanger, as shown in FIG. 1. At least three remotely operable clamping fingers 2, 3, 4 are arranged on this. The clamping finger 2 is provided centrally and at least approximately in the middle of the yoke. The central clamping finger 2 is rotatably arranged with the interposition of a lifting cylinder 5 with a piston 6 via a piston rod 7 on the yoke 1 via roller bearings 8. The lifting cylinder 5 can be actuated via pressure medium lines 5a, 5b. On the two yoke ends, at least one additional clamping finger 3 or 4, in particular one pair of clamping fingers each, is detachably held by a remotely operable clamping device 9, to which pressure medium lines 9a are guided. In other words, the further clamping fingers 3, 4 are detachably connected to the two yoke ends via clamping devices 9.

Die Spannfinger 2, 3, 4 weisen jeweils zum Verspannen eine an sich bekannte (nicht bezeichnete) Spann- oder Spreizvorrichtung auf, die durch ein Druckmittel betätigt wird. Das Druckmittel wird jeweils über eine Druckmittelleitung 10 zugeführt; es er­möglicht ein individuelles Arretieren oder Verspannen der Spreizfinger 2, 3, 4 in den Wärmetauscherrohren 11.The clamping fingers 2, 3, 4 each have a known clamping device (not designated) for clamping, which is actuated by a pressure medium. The pressure medium is supplied via a pressure medium line 10; it enables the spreading fingers 2, 3, 4 to be individually locked or braced in the heat exchanger tubes 11.

An jedem der beiden endseitigen weiteren Spannfinger bzw. Spann­fingerpaare hängt ein Zahnriemen 19 bzw. 20. Die Zahnriemen 19 und 20 sind an den endseitigen Spannfingern 3 bzw. 4 in prin­ ziell beliebiger Weise angeordnet. Sie werden beim Heben oder Senken von den Spannfingern 3 bzw. 4 mitgenommen.A toothed belt 19 or 20 is attached to each of the two further end tensioning fingers or pairs of tensioning fingers. The toothed belts 19 and 20 are in principle on the end tensioning fingers 3 or 4 arranged in any way. They are carried by the tension fingers 3 and 4 when lifting or lowering.

In FIG 2 ist eine Kammer eines Wärmetauschers 12 dargestellt, deren Oberseite durch den Rohrboden 11R begrenzt wird, in den die Wärmetauscherrohre 11 einmünden. Die Unterseite der Kammer ist durch einen halbkugelförmigen Boden 13 abgeschlossen, in dem ein Mannloch 14 vorgesehen ist. Durch das Mannloch 14 können Ge­räte und Vorrichtungen wie Manipulator, Werkzeug, Prüfvorrich­tungen und dergleichen eingeführt werden. Im Ausführungsbeispiel wird zur Erleichterung des Einführens eines Gerätes oder einer Vorrichtung, insbesondere eines Manipulators, zunächst das Mon­tagejoch 1 von einer Bedienungsperson von Hand (händisch) mit­tels einer Montagestange 15 durch das Mannloch 14 eingebracht. Dabei wird der mittlere Spannfinger 2 bei ausgefahrenem Zylinder 5 in ein beliebig ausgewähltes Wärmetauscherrohr 11 eingeführt. Die Montagestange 15 hat an dem freien Ende eine fernbetätigba­re, insbesondere durch ein Druckmittel betätigbare Greifvorrich­tung 15a, mit der sie einen Teil des Montagejoches 1, insbeson­dere den Kopf des Zylinders 5, fest umgreift.FIG. 2 shows a chamber of a heat exchanger 12, the upper side of which is delimited by the tube sheet 11R, into which the heat exchanger tubes 11 open. The underside of the chamber is closed by a hemispherical base 13 in which a manhole 14 is provided. Devices and devices such as manipulator, tools, test devices and the like can be introduced through the manhole 14. In the exemplary embodiment, in order to facilitate the insertion of a device or a device, in particular a manipulator, the assembly yoke 1 is first inserted (manually) by an operator through the manhole 14 using an assembly rod 15. The middle clamping finger 2 is inserted into an arbitrarily selected heat exchanger tube 11 when the cylinder 5 is extended. The mounting rod 15 has at the free end a remotely operable, in particular actuatable by a pressure medium gripping device 15a, with which it firmly engages around part of the mounting yoke 1, in particular the head of the cylinder 5.

Nach dem Einführen des Montagejoches 1 wird die Spann- oder Spreizvorrichtung des zentralen Spannfingers 2 ferngesteuert betätigt, so daß es in dem ausgewählten Wärmetauscherrohr 11 verspannt wird. Dies ist in FIG 3 gezeigt.After insertion of the mounting yoke 1, the tensioning or spreading device of the central tensioning finger 2 is actuated remotely, so that it is clamped in the selected heat exchanger tube 11. This is shown in FIG 3.

Am zentralen Spannfinger 2 ist ein Endkontakt 2a vorgesehen. Dieser Endkontakt 2a löst ein automatisches Verspannen des zen­tralen Spannfingers 2 aus, wenn der Endkontakt 2a nach dem Ein­führen des Spannfingers 2 in ein Wärmetauscherrohr 11 am Rohr­boden 11R zur Anlage kommt.An end contact 2a is provided on the central clamping finger 2. This end contact 2a triggers an automatic tensioning of the central clamping finger 2 when the end contact 2a comes to rest on the tube sheet 11R after the insertion of the clamping finger 2 into a heat exchanger tube 11.

Das Montagejoch 1 wird nun in eine gewünschte Lage am Rohrboden 11R gebracht. Dazu wird es um den zentralen Spannfinger 2 in Richtung der Rohrreihen (Verbindungslinie der Rohrmitten in X-Richtung), d.h. parallel zur Rohrgasse, gedreht, bis die beiden äußeren, am Tragjoch angeordneten Spannfinger 3, 4 bzw. Spannfingerpaare unter zwei bzw. vier Heizrohröffnungen stehen. Dies kann mittels der Montagestange 15 erfolgen. In vorteilhaf­ter Weise kann es aber auch über einen fernsteuerbaren elektri­schen Antriebsmotor 16 geschehen, der über ein als Ritzel 17 und Zahnrad 18 ausgebildetes Getriebe mit der Kolbenstange 7 des Hubzylinders 5 verbunden ist. Die Spannfinger 2, 3, 4 haben ei­nen gegenseitigen Abstand, der ein ganzzahliges Vielfaches des Abstandes zweier Wärmetauscherrohr 11 beträgt. (Dies gilt auch für die unten beschriebenen Spannfinger 22 bis 25).The mounting yoke 1 is now brought into a desired position on the tube sheet 11R. For this purpose, it is rotated around the central clamping finger 2 in the direction of the tube rows (connecting line of the tube centers in the X direction), ie parallel to the tube lane, until the the two outer clamping fingers 3, 4 or pairs of clamping fingers arranged on the support yoke are under two or four heating tube openings. This can be done using the mounting rod 15. In an advantageous manner, however, it can also be done via a remotely controllable electric drive motor 16, which is connected to the piston rod 7 of the lifting cylinder 5 via a gear designed as a pinion 17 and gear 18. The clamping fingers 2, 3, 4 are at a mutual distance which is an integral multiple of the distance between two heat exchanger tubes 11. (This also applies to the clamping fingers 22 to 25 described below).

Durch Absenken des Hubzylinders 5 werden die beiden endseitigen Spannfinger 3, 4 in die Wärmetauscherrohre 11 eingeschoben und dort mittels der Spreizvorrichtungen fernbetätigt verspannt. Zum automatischen Auslösen des Verspannens können am Joch 1 oder an den Spannfingern 3, 4 wieder Endkontakte 2a vorgesehen sein.By lowering the lifting cylinder 5, the two end clamping fingers 3, 4 are inserted into the heat exchanger tubes 11 and clamped there remotely by means of the spreading devices. End contacts 2a can again be provided on the yoke 1 or on the clamping fingers 3, 4 for automatically triggering the tensioning.

Nach dem Verspannen der beiden Spannfinger 3, 4 (oder -Paare) in den Wärmetauscherrohren 11 werden die Klemmvorrichtungen 9 und wird die Spreizvorrichtung des Spannfingers 2 fernbedient ge­löst. Damit sind die beiden eingeschobenen endseitigen Spann­finger 3, 4 vom Tragjoch 1 gelöst bzw. ist die Verspannung des zentralen Spannfingers 2 im Wärmetauscherrohr 11 aufgehoben. Nun kann das Tragjoch 1 samt Spannfinger 2 mittels der Montagestange 15 entfernt werden. Wie FIG 4 zeigt, bleiben dann im Rohrboden 11R nur die beiden endseitigen Spannfinger 3, 4 mit den an ihnen hängenden Zahnriemen 19, 20 verankert.After the two clamping fingers 3, 4 (or pairs) have been clamped in the heat exchanger tubes 11, the clamping devices 9 and the expanding device of the clamping finger 2 are released remotely. The two inserted end clamping fingers 3, 4 are thus released from the supporting yoke 1 or the tensioning of the central clamping finger 2 in the heat exchanger tube 11 is released. The support yoke 1 together with the clamping finger 2 can now be removed by means of the mounting rod 15. As shown in FIG. 4, only the two end tensioning fingers 3, 4 then remain anchored in the tube sheet 11R with the toothed belts 19, 20 hanging on them.

Die einzelnen Spannfinger 2, 3, 4 können Spreizvorrichtungen aus Gummi oder Metall haben, und zwar in bekannter Ausführung.The individual clamping fingers 2, 3, 4 can have spreading devices made of rubber or metal, in a known embodiment.

Das einzubringende Gerät 21, das nach FIG 5 als Finger-Walker ausgebildet ist, besitzt ein Schreitwerk mit einer Anzahl von Spannfingern 22, 23, 24, 25 sowie Versorgungs- und Steuerlei­tungen, die in einem flexiblen Rohr 21a untergebracht sind. Die geräteeigenen Spannfinger 22 bis 25 können wie die Spannfinger 2, 3, 4 ausgebildet sein; sie besitzen auch entsprechende Spreizvorrichtungen zum Verspannen. Das Gerät 21 ist an zwei Aufzügen 26, 27 lösbar befestigt, die jeweils mit einem Zahn­riemengetriebe 28 ausgerüstet und synchron steuerbar sind. Den Zahnriemengetrieben 28 sind Führungen 29 zugeordnet, die rohr­artig ausgebildet sind. An den Führungen 29 sind Tragelemente 30a und Verbindungsmittel 30b zum lösbaren Halten des Gerätes 21 angeordnet. Die Zahnriemengetriebe 28 stehen in drehmoment­schlüssiger Verbindung mit synchron steuerbaren elektrischen Antriebsmotoren 31, die mit elektrischen Versorgungs- und Steuerleitungen 32 verbunden sind. Die als Elektro-Hebetriebe ausgebildeten Aufzüge 26, 27 tragen das Gerät 21 durch das Mann­loch 14 bis unter den Rohrboden 11R, bis die geräteeigenen Spannfinger 22 und 25 ausreichend tief die in Wärmetauscher­rohre 11 ragen und dort verspannt werden können. Auch an den Spannfingern 22 bis 25 des Gerätes 21 können Endkontakte 2a vorgesehen sein, die jeweils ein automatisches Verspannen der Spannfinger 22 bis 25 nach dem vollständigen Einführen auslösen.The device 21 to be introduced, which is designed as a finger walker according to FIG. 5, has a walking mechanism with a number of clamping fingers 22, 23, 24, 25 and supply and control lines which are accommodated in a flexible tube 21a. The device's own clamping fingers 22 to 25 can be used like the clamping fingers 2, 3, 4 be formed; they also have corresponding spreading devices for bracing. The device 21 is releasably attached to two elevators 26, 27, each of which is equipped with a toothed belt transmission 28 and can be controlled synchronously. The toothed belt drives 28 are assigned guides 29 which are tubular. Carrying elements 30a and connecting means 30b for releasably holding the device 21 are arranged on the guides 29. The toothed belt transmissions 28 are connected in a torque-locking manner to synchronously controllable electric drive motors 31, which are connected to electrical supply and control lines 32. The elevators 26, 27, which are designed as electric lifting mechanisms, carry the device 21 through the manhole 14 to below the tube plate 11R until the device's own clamping fingers 22 and 25 protrude sufficiently deep into the heat exchanger tubes 11 and can be clamped there. End contacts 2a can also be provided on the tensioning fingers 22 to 25 of the device 21, each of which triggers an automatic tensioning of the tensioning fingers 22 to 25 after complete insertion.

Die Aufzüge 26, 27 mitsamt den flexiblen Zahnriemen 19, 20 kön­nen durch einfaches Entspannen der Spannfinger 3, 4 und durch Lösen der Verbindungsmittel 30b vom Rohrboden 11R entfernt wer­den. Damit ist das Gerät 21 allein am Rohrboden 11R verankert und steht in seiner Arbeits-Ausgangsposition.The elevators 26, 27 together with the flexible toothed belts 19, 20 can be removed from the tube sheet 11R by simply releasing the tension fingers 3, 4 and by releasing the connecting means 30b. The device 21 is thus anchored to the tube sheet 11R alone and is in its starting position.

Nach Beendigung der Tätigkeit des Gerätes 21 wird dieses unter Zuhilfenahme des Montagejoches 1 analog zum Einbauvorgang ausge­baut. Es sei hervorgehoben, daß der Ein- und Ausbauvorgang von nur einer Person von außerhalb des Mannloches 14 in wenigen Mi­nuten vorgenommen werden kann.After the end of the activity of the device 21, it is expanded with the aid of the mounting yoke 1 analogous to the installation process. It should be emphasized that the installation and removal process can be carried out by just one person from outside the manhole 14 in a few minutes.

Claims (8)

1. Vorrichtung zum Einbringen und/oder Positionieren eines Ge­rätes (21), insbesondere eines Manipulators, in eine(-r) Kammer (12) eines Wärmetauschers, bei der an einem mit einer Montage­stange (15) händisch in die Kammer (12) einbringbaren und in Wärmetauscherrohren (11) arretierbaren Montagejoch (1) minde­stens drei fernbetätigbare Spannfinger (2, 3, 4) angeordnet sind, von denen ein Spannfinger (2) zumindest annähernd in der Jochmitte unter Zwischenschaltung eines Hubzylinders (5) ange­ordnet ist und von denen mindestens je ein weiterer Spannfinger (3 bzw. 4) an den beiden Jochenden mittels einer fernbetätigba­ren Klemmvorrichtung (9) lösbar festgehalten ist, wobei mit den an den Jochenden angeordneten weiteren Spannfingern (3, 4) je­weils das Ende eines Zahnriemens (19 bzw. 20) verbunden ist und die Zahnriemen (19, 20) mit je einem Zahnriemengetriebe (28) zweier synchron steuerbarer Aufzüge (26, 27) im Eingriff stehen, an denen Tragelemente (30a) und lösbare Verbindungsmittel (30b) für das Gerät (21) angeordnet sind.1. Device for introducing and / or positioning a device (21), in particular a manipulator, in a (-r) chamber (12) of a heat exchanger, which can be inserted manually into the chamber (12) with a mounting rod (15) and in the heat exchanger tubes (11) lockable mounting yoke (1) at least three remotely operable clamping fingers (2, 3, 4) are arranged, of which a clamping finger (2) is arranged at least approximately in the middle of the yoke with the interposition of a lifting cylinder (5) and of which at least Each additional tension finger (3 or 4) is detachably held on the two yoke ends by means of a remotely operable clamping device (9), the end of a toothed belt (19 or 20) being provided with the additional tension fingers (3, 4) arranged on the yoke ends. is connected and the toothed belts (19, 20) are each in engagement with a toothed belt transmission (28) of two synchronously controllable elevators (26, 27) on which support elements (30a) and releasable connecting means (30b ) are arranged for the device (21). 2. Vorrichtung nach Anspruch 1, bei der am Montagejoch (1) oder am Spannfinger (2 bis 4; 22 bis 25) ein Endkontakt (2a) vorge­sehen ist, der ein automatisches Verspannen des Spannfingers nach seinem Einführen in ein Wärmetauscherrohr (11) auslöst.2. Device according to claim 1, in which on the mounting yoke (1) or on the tensioning finger (2 to 4; 22 to 25) an end contact (2a) is provided which triggers an automatic tensioning of the tensioning finger after its insertion into a heat exchanger tube (11) . 3. Vorrichtung nach Anspruch 1 oder 2, bei der der Hubzylinder (5) mit dem zentralen Spannfinger (3) drehbar an dem Montagejoch (1) gelagert ist.3. Device according to claim 1 or 2, wherein the lifting cylinder (5) with the central clamping finger (3) is rotatably mounted on the mounting yoke (1). 4. Vorrichtung nach Anspruch 3, bei der eine Kolbenstange (7) des Hubzylinders (5) über ein Getriebe (17, 18) mit einem fern­steuerbaren elektrischen Antriebsmotor (16) verbunden ist.4. The device according to claim 3, wherein a piston rod (7) of the lifting cylinder (5) via a gear (17, 18) with a remotely controllable electric drive motor (16) is connected. 5. Vorrichtung nach einem der vorhergehenden Ansprüche, bei der die Montagestange (15) an einem Ende mit einer fernbetätigbaren, insbesondere durch ein Druckmittel betätigbaren Greifvorrich­tung (15a) versehen ist.5. Device according to one of the preceding claims, wherein the mounting rod (15) at one end with a remotely operable, is provided in particular by a gripping device (15a) which can be actuated by a pressure medium. 6. Verfahren zum Einbringen und/oder Positionieren eines Gerä­tes (21), insbesondere eines Manipulators, in eine(-r) Kammer (12) eines Wärmetauschers (21), bei dem a) ein Montagejoch (1), z.B. mittels einer Montagestange (15), durch ein Mannloch (14) händisch in die Kammer (12) einge­bracht wird, b) ein am Montagejoch (11) angebrachter zentraler Spannfinger (2) in ein ausgewähltes Wärmetauscherrohr (11) des Wärmetau­schers (21) eingeführt und dort mittels einer Spreizvorrich­tung fernbetätigt verspannt wird, c) das Montagejoch (1) durch Drehen um den zentralen Spannfinger (2), z.B. mittels der Montagestange (15), in eine gewünschte Lage zum Rohrboden (11R) gebracht wird, d) das Montagejoch (1) durch Betätigen eines Hubzylinders (5) angehoben wird und an den Enden des Montagejoches (1) ange­ordnete weitere Spannfinger (3, 4) in je ein weiteres Wärme­tauscherrohr (11) eingeführt und dort fernbetätigt mittels weiterer Spreizvorrichtungen verspannt werden, wobei an den weiteren Spannfingern (3, 4) angeordnete Zahnriemen (19, 20) mitgenommen werden und wobei die weiteren Spannfinger (3, 4) über Klemmvorrichtungen (9) mit den beiden Jochenden verbun­den sind, e) das Montagejoch (1) durch Lösen der Klemmvorrichtungen (9) der an den Jochenden verspannten weiteren Spannfinger (3, 4) und der Spreizvorrichtung des zentralen Spannfingers (2), z.B. mittels der Montagestange (15), vom Rohrboden (11R) ab­genommen und entfernt wird, wobei die beiden weiteren Spann­finger (3, 4) mit den Zahnriemen (19, 20) am Rohrboden (11R) verbleiben, und f) an den im Rohrboden (11R) mittels der weiteren Spannfinger (3, 4) verankerten Zahnriemen (19, 20) das Gerät (21) mit Hilfe von Aufzügen (26, 27) in die Kammer (12) eingefahren und mittels am Gerät (21) angeordneter Spannfinger (22 bis 25) am Rohrboden (11R) verspannt wird. 6. Method for introducing and / or positioning a device (21), in particular a manipulator, in a (-r) chamber (12) of a heat exchanger (21), in which a) a mounting yoke (1), for example by means of a mounting rod (15), is manually inserted into the chamber (12) through a manhole (14), b) a central tensioning finger (2) attached to the mounting yoke (11) is inserted into a selected heat exchanger tube (11) of the heat exchanger (21) and tensioned there remotely by means of a spreading device, c) the assembly yoke (1) is brought into a desired position with respect to the tube sheet (11R) by rotating around the central clamping finger (2), for example by means of the assembly rod (15), d) the mounting yoke (1) is raised by actuating a lifting cylinder (5) and further clamping fingers (3, 4) arranged at the ends of the mounting yoke (1) are each inserted in a further heat exchanger tube (11) and tensioned there remotely by means of further spreading devices , wherein toothed belts (19, 20) arranged on the further tensioning fingers (3, 4) are taken along and the further tensioning fingers (3, 4) are connected to the two yoke ends via clamping devices (9), e) the mounting yoke (1) by loosening the clamping devices (9) of the additional clamping fingers (3, 4) clamped to the yoke ends and the expanding device of the central clamping finger (2), for example by means of the mounting rod (15), removed from the tube sheet (11R) and is removed, the two further tensioning fingers (3, 4) with the toothed belts (19, 20) remaining on the tube sheet (11R), and f) the device (21) is inserted into the chamber (12) by means of lifts (26, 27) on the toothed belts (19, 20) anchored in the tube sheet (11R) by means of the further tensioning fingers (3, 4) and is clamped to the tube sheet (11R) by means of clamping fingers (22 to 25) arranged on the device (21). 7. Verfahren nach Anspruch 6, bei dem nach dem Verspannen des Gerätes (21) am Rohrboden (11R) das Gerät (21) durch Lösen von Verbindungsmitteln (30b) von den Aufzügen (26, 27) getrennt wird, die Verspannung der weiteren Spannfinger (3, 4) durch die Spreizvorrichtungen gelöst wird und die Spannfinger (3, 4) mit den Zahnriemen (19, 20) vom Rohrboden entfernt werden.7. The method according to claim 6, in which after the device (21) is braced on the tube sheet (11R), the device (21) is separated from the elevators (26, 27) by releasing connecting means (30b), the bracing of the further clamping fingers (3, 4) is released by the spreading devices and the clamping fingers (3, 4) with the toothed belt (19, 20) are removed from the tube sheet. 8. Verfahren nach Anspruch 6 oder 7 zum Ausbau des Gerätes (21) und Entfernen aus der Kammer (12), bei dem nach Beendigung der Tätigkeit des Gerätes (21) dieses unter Zuhilfenahme des Monta­gejoches (1) wieder vom Rohrboden (11R) entfernt wird.8. The method according to claim 6 or 7 for removing the device (21) and removing from the chamber (12), in which after the end of the activity of the device (21) this with the help of the mounting yoke (1) again removed from the tube sheet (11R) becomes.
EP88115221A 1987-09-18 1988-09-16 Device to introduce a tool to a heat exchanger Withdrawn EP0307943A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8712638U DE8712638U1 (en) 1987-09-18 1987-09-18 Device for inserting a device into a heat exchanger
DE8712638U 1987-09-18

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EP0307943A1 true EP0307943A1 (en) 1989-03-22

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US7314343B2 (en) * 2002-07-22 2008-01-01 Westinghouse Electric Co. Llc Miniature manipulator for servicing the interior of nuclear steam generator tubes
US7533715B1 (en) * 2003-09-26 2009-05-19 Areva Np Inc. Tube walker for examination and repair of steam generators
JP5314609B2 (en) * 2010-01-27 2013-10-16 三菱重工業株式会社 Water chamber working device
CN106643279B (en) * 2016-12-29 2018-09-11 广西恩康机械设备有限公司 The auto-cleaning method of tubular heat exchanger

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EP0064436A1 (en) * 1981-04-17 1982-11-10 Framatome Device for introducing or retrieving a member in a steam generator
EP0066791A1 (en) * 1981-06-06 1982-12-15 BROWN BOVERI REAKTOR GmbH Apparatus for carrying out inspectionwork on a steam generator in a nuclear reactor and a method for insersting this apparatus in the chamber of a steam generator
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DE8712638U1 (en) 1987-12-10
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