[go: up one dir, main page]

EP0058385B1 - Arrangement for pressure-sealed installation of a tube in a tube sheet by means of a pressurized fluid - Google Patents

Arrangement for pressure-sealed installation of a tube in a tube sheet by means of a pressurized fluid Download PDF

Info

Publication number
EP0058385B1
EP0058385B1 EP82100962A EP82100962A EP0058385B1 EP 0058385 B1 EP0058385 B1 EP 0058385B1 EP 82100962 A EP82100962 A EP 82100962A EP 82100962 A EP82100962 A EP 82100962A EP 0058385 B1 EP0058385 B1 EP 0058385B1
Authority
EP
European Patent Office
Prior art keywords
pressure
expansion
expansion pressure
piston
mandrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP82100962A
Other languages
German (de)
French (fr)
Other versions
EP0058385A1 (en
Inventor
Wilfried Busse
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT82100962T priority Critical patent/ATE13823T1/en
Publication of EP0058385A1 publication Critical patent/EP0058385A1/en
Application granted granted Critical
Publication of EP0058385B1 publication Critical patent/EP0058385B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B21D39/203—Tube expanders with mandrels, e.g. expandable expandable by fluid or elastic 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994—Radially expanding internal tube
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53113—Heat exchanger
    • Y10T29/53122—Heat exchanger including deforming means

Definitions

  • the invention relates, according to the preamble of claim 1, to a system for the pressure-tight fastening of a tube in a tube sheet with the aid of a pressure fluid, with a pressure build-up mandrel, a pressure fluid filling device and an expansion pressure generator, the expansion pressure generator being connected directly to the pressure build-up mandrel via the expansion pressure generator, wherein the expansion pressure generator has a pressure cylinder, a pressure piston, an expansion pressure seal and a filling connection opening into the pressure cylinder for the hydraulic fluid filling device, and the connection between the filling connection of the expansion pressure generator and the pressure build-up mandrel is open when the expansion pressure generator is passive and is blocked when the expansion pressure generator is active .
  • a system has become known from DE-B-26 16 523.
  • the invention relates to the "hydraulic expansion of pipes", which has been known for a long time (see, for example, DE-OS 1939 105 and the essay by M. Podhorsky and H. Krips "Hydraulic expansion of pipes” in VGB KRAFTWERKSTECHNIK, issue 1/1979, pages 81 to 87), in which the pipe end of the pipe to be fastened is inserted with play into a bore in the tube sheet, the pressure build-up mandrel is inserted into the pipe end of the pipe to be fastened, the cavity between the pipe end of the fastening pipe and the pressure build-up mandrel at the two ends of an expansion area - with the aid of at least two seals - and via at least one pressure medium supply led through the pressure build-up mandrel and into the cavity between the pipe end of the pipe to be fastened and the pressure build-up mandrel, a pressure fluid is supplied to the cavity becomes.
  • a filling pressure generator belonging to the hydraulic fluid filling device and the expansion pressure generator each have a double piston with a pressure piston that acts on the hydraulic fluid, ie the water, and an oil-loaded drive piston.
  • the invention is therefore based on the object of designing and developing the system in question for "hydraulic expansion of pipes" in such a way that the self-releasing check valve described and a manually operated residual pressure relief valve are no longer required.
  • the system according to the invention for the pressure-tight fastening of a tube in a tube sheet with the aid of a hydraulic fluid, in which the above-described object is achieved is characterized in that the expansion pressure seal is arranged in the inner wall of the pressure cylinder and the filling connection - as seen in the direction of movement of the pressure piston - before the expansion pressure seal opens into the pressure cylinder.
  • the expansion pressure generator is designed so that it also takes over the function of the self-releasing check valve that was necessary in the prior art. If the expansion pressure generator is initially passive, i. H. the pressure piston in its retracted, passive end position, the pressure fluid can easily be fed from the pressure fluid filling device via the expansion pressure generator past the expansion pressure seal to the pressure build-up mandrel.
  • the expansion pressure generator is then activated to build up the expansion pressure, the connection between the filling connection of the expansion pressure generator and the pressure build-up mandrel is blocked by pushing the pressure piston forward, moving the fill connection over, sliding into the expansion pressure seal and thus decoupling the pressure build-up mandrel from the filling connection, so that the expansion pressure generator the hydraulic fluid cannot push back into the hydraulic fluid filling device. If the expansion pressure generator is passivated again after the expansion, the connection between the pressure build-up mandrel and the filling connection of the expansion pressure generator is opened again, so that the residual pressure can be released into the hydraulic fluid filling device. Of particular importance is the fact that the expansion pressure seal is provided in the inner wall of the pressure cylinder, i.e.
  • the expansion pressure seal is provided in the outer wall of the pressure piston, i.e. it is designed as a so-called piston seal is.
  • the design of the expansion pressure seal of the expansion pressure generator as a so-called rod seal has a number of advantages over the design as a so-called piston seal.
  • the pressure piston for interacting with the expansion pressure seal can be machined better than the pressure cylinder.
  • the expansion pressure seal does not have to be embedded in the inner wall of the printing cylinder, but can also project over the inner wall of the printing cylinder, that is to say it can be arranged on the inner wall of the printing cylinder.
  • the expansion pressure generator with a filling pressure seal before the filling connection, as seen in the direction of movement of the pressure piston.
  • the filling connection between the expanding pressure seal and the filling pressure seal is located on the expanding pressure generator.
  • the pressure piston of the expansion pressure generator is generally brought into a passive end position by the explained residual pressure of the pressure fluid. Nevertheless, it may be advisable to provide the expansion pressure generator with a compression spring which ensures a passive end position of the pressure piston. This prevents the connection between the filling connection of the expansion pressure generator and the pressure build-up mandrel from being partially opened or partially blocked by the pressure piston of the expansion pressure generator when the expansion pressure generator is passive.
  • FIG. 1 shows a system for the pressure-tight fastening of a tube, not shown, in a tube sheet, not shown, with the aid of a hydraulic fluid, with a pressure build-up mandrel 1, a hydraulic fluid filling device 2 and an expansion pressure generator 3.
  • the hydraulic fluid filling device 2 and the expansion pressure generator 3 are connected to the pressure expansion mandrel 1 .
  • Water is used as the pressure fluid, while the pressure fluid filling device 2 and the expansion pressure generator 3 operate with oil conveyed by a pump as the drive means; a filling pressure generator 5 belonging to the hydraulic fluid filling device 2 and the expansion pressure generator 3 each have a double piston 6, 7, each with a pressure piston 8, 9 which pressurizes the hydraulic fluid, that is to say the water, and in each case an oil-loaded drive piston 10, 11. 1 shows a plurality of connecting, measuring and control means, which do not need to be described here.
  • the expansion pressure generator 3 has a pressure cylinder 12, the double piston 7 with the pressure piston 9 and an expansion pressure seal 13, which is effective between the pressure cylinder 12 and the pressure piston 9.
  • the pressure fluid filling device 2 is connected to the pressure build-up mandrel 1 via the expansion pressure generator 3, that is to say the expansion pressure generator 3 has a filling connection 14, and the connection between the filling connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is opened, on the other hand, when the expansion pressure generator 3 is passive locked when the expansion pressure generator 3 is active.
  • the expansion pressure generator 3 is designed so that when it, as it were between the Hydraulic fluid filling device 2 and the pressure build-up mandrel 1 is provided, which also takes over the function of the self-releasing check valve that was necessary in the prior art. If the expansion pressure generator 3 is initially passive, the pressure fluid can be fed from the pressure fluid filling device 2 via the expansion pressure generator 3 to the pressure build-up mandrel 1, because the connection between the filler connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is then opened.
  • the expansion pressure generator is activated, the connection between the filling connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is blocked, so that the expansion pressure generator 3 cannot press the hydraulic fluid back into the hydraulic fluid filling 2. If the expansion pressure generator 3 is then passivated again after expansion, the connection between the filling connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is opened again, so that the residual pressure in the hydraulic fluid filling device 2 can be reduced.
  • the filling connection 14 - seen in the direction of movement of the pressure piston 9 - is provided in the expansion pressure generator 3 in front of the expansion pressure seal 13 and the expansion pressure generator 3 - viewed in the direction of movement of the pressure piston 9 - has a filling pressure seal 15 in front of the filling connection 14; the filling connection 14 is thus between the expanding pressure seal 13 and the filling pressure seal 15.
  • the expanding pressure generator 3 also has a passive end position of the pressure piston 9, pressure spring 16 and the expanding pressure seal 13 is provided in the inner wall of the pressure cylinder 9, that is to say as a so-called rod seal executed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Actuator (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Press Drives And Press Lines (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)

Description

Die Erfindung betrifft gemäß Oberbegriff von Anspruch 1 eine Anlage zur druckdichten Befestigung eines Rohres in einem Rohrboden mit Hilfe einer Druckflüssigkeit, mit einem Druckaufbaudorn, einer Druckflüssigkeitsfülleinrichtung und einem Aufweitdruckerzeuger, wobei der Aufweitdruckerzeuger direkt und die Druckflüssigkeitsfülleinrichtung über den Aufweitdruckerzeuger mit dem Druckaufbaudorn verbunden ist, wobei der Aufweitdruckerzeuger einen Druckzylinder, einen Druckkolben, eine Aufweitdruckdichtung sowie einen in den Druckzylinder mündenden Füllanschluß für die Druckflüssigkeitsfülleinrichtung aufweist und wobei die Verbindung zwischen dem Füllanschluß des Aufweitdruckerzeugers und dem Druckaufbaudorn geöffnet ist, wenn der Aufweitdruckerzeuger passiv ist und gesperrt ist, wenn der Aufweitdruckerzeuger aktiv ist. Eine solche Anlage ist mit der DE-B-26 16 523 bekanntgeworden.The invention relates, according to the preamble of claim 1, to a system for the pressure-tight fastening of a tube in a tube sheet with the aid of a pressure fluid, with a pressure build-up mandrel, a pressure fluid filling device and an expansion pressure generator, the expansion pressure generator being connected directly to the pressure build-up mandrel via the expansion pressure generator, wherein the expansion pressure generator has a pressure cylinder, a pressure piston, an expansion pressure seal and a filling connection opening into the pressure cylinder for the hydraulic fluid filling device, and the connection between the filling connection of the expansion pressure generator and the pressure build-up mandrel is open when the expansion pressure generator is passive and is blocked when the expansion pressure generator is active . Such a system has become known from DE-B-26 16 523.

Gegenstand der Erfindung ist das »hydraulische Aufweiten von Rohren«, das schon seit langem bekannt ist (vgl. z. B. die DE-OS 1939 105 und den Aufsatz von M. Podhorsky und H. Krips »Hydraulisches Aufweiten von Rohren« in VGB KRAFTWERKSTECHNIK, Heft 1/1979, Seiten 81 bis 87), bei dem das Rohrende des zu befestigenden Rohres mit Spiel in eine Bohrung des Rohrbodens eingesetzt wird, in das Rohrende des zu befestigenden Rohres der Druckaufbaudorn eingebracht wird, der Hohlraum zwischen dem Rohrende des zu befestigenden Rohres und dem Druckaufbaudorn an den beiden Enden eines Aufweitbereiches - mit Hilfe von mindestens zwei Dichtungen - abgedichtet wird und über mindestens eine durch den Druckaufbaudorn geführte und in den Hohlraum zwischen dem Rohrende des zu befestigenden Rohres und dem Druckaufbaudorn mündende Druckmittelzuführung dem Hohlraum eine Druckflüssigkeit zugeführt wird.The invention relates to the "hydraulic expansion of pipes", which has been known for a long time (see, for example, DE-OS 1939 105 and the essay by M. Podhorsky and H. Krips "Hydraulic expansion of pipes" in VGB KRAFTWERKSTECHNIK, issue 1/1979, pages 81 to 87), in which the pipe end of the pipe to be fastened is inserted with play into a bore in the tube sheet, the pressure build-up mandrel is inserted into the pipe end of the pipe to be fastened, the cavity between the pipe end of the fastening pipe and the pressure build-up mandrel at the two ends of an expansion area - with the aid of at least two seals - and via at least one pressure medium supply led through the pressure build-up mandrel and into the cavity between the pipe end of the pipe to be fastened and the pressure build-up mandrel, a pressure fluid is supplied to the cavity becomes.

Der druckdichten Befestigung von Rohren in Rohrböden od. dgl., z. B. der Wärmetauscherrohre in den Rohrböden von Wärmetauschern, kommt eine enorme wirtschaftliche Bedeutung zu. Über mehrere Jahrzente hinweg ist als Verfahren dazu das »mechanische Einwalzen« angewendet worden, das jedoch sehr aufwendig ist und nicht zu hinreichend exakt berechenbaren Ergebnissen führt (vgl. M. Podhorsky und H. Krips »Hydraulisches Aufweiten von Rohren«, aa0). Gegenüber dem »mechanischen Einwalzen« ist das »hydraulische Aufweiten« mit einer Vielzahl von Vorteilen verbunden (vgl. M. Podhorsky und H. Krips »Hydraulisches Aufweiten von Rohren«, aa0).The pressure-tight attachment of pipes in tube sheets or the like, z. B. the heat exchanger tubes in the tube sheets of heat exchangers, is of enormous economic importance. For several decades, »mechanical rolling-in« has been used as a method, but this is very complex and does not lead to results that can be calculated with sufficient accuracy (cf. M. Podhorsky and H. Krips »Hydraulic expansion of pipes«, op. Cit.). Compared to "mechanical rolling", "hydraulic expansion" has a number of advantages (see M. Podhorsky and H. Krips "Hydraulic expansion of pipes", op. Cit.).

Bei der bekannten Anlage zum »hydraulischen Aufweiten von Rohren«, von der die Erfindung ausgeht, wird als Druckflüssigkeit Wasser verwendet, während die Druckflüssigkeitsfülleinrichtung und der Aufweitdruckerzeuger mit von einer Pumpe gefördertem Öl als Antriebsmittel arbeiten; ein zu der Druckflüssigkeitsfülleinrichtung gehörender Fülldruckerzeuger und der Aufweitdruckerzeuger weisen jeweils einen Doppelkolben mit einem die Druckflüssigkeit, also das Wasser, beaufschlagenden Druckkolben und einen ölbeaufschlagten Antriebskolben auf.In the known system for "hydraulic expansion of pipes" from which the invention is based, water is used as the pressure fluid, while the pressure fluid filling device and the expansion pressure generator work with oil conveyed by a pump as the drive means; a filling pressure generator belonging to the hydraulic fluid filling device and the expansion pressure generator each have a double piston with a pressure piston that acts on the hydraulic fluid, ie the water, and an oil-loaded drive piston.

Nachteilig ist bei der bekannten Anlage, daß in der Verbindung zwischen der Druckflüssigkeitsfülleinrichtung und dem Druckaufbaudorn mindestens ein selbstentsperrendes Rückschlagventil (Rückschlagventil 19 in der DE-B-26 16 523) vorgesehen sein muß. Dieses selbstentsperrende Rückschlagventil hat zunächst als Rückschlagventil die Aufgabe, dann, wenn mit Hilfe der Druckflüssigkeitsfülleinrichtung Druckflüssigkeit eingefüllt ist, den Aufbau des Aufweitdruckes - mit Hilfe des Aufweitdruckerzeugers - zu ermöglichen, also zu verhindern, daß der Aufweitdruckerzeuger die Druckflüssigkeit in die Druckflüssigkeitsfülleinrichtung zurückdrückt. Das Rückschlagventil muß aber auch selbstentsperrend sein, und zwar aus folgendem Grund:

  • Beim Aufbau des Aufweitdruckes - bis ca. 4000 bar - wird die Druckflüssigkeit komprimiert; das Volumen der unter dem Aufweitdruck stehenden Druckflüssigkeit ist um das Kompressionsvolumen kleiner als das Volumen der entspannten Druckflüssigkeit. Nun entsteht zwar beim Aufweiten - durch das Aufweiten des Rohrendes des zu befestigenden Rohres - ein Verdrängungsvolumen, das beim Abbau des Aufweitdruckes für die Druckflüssigkeit zur Verfügung steht. Da jedoch das Kompressionsvolumen in der Regel größer ist als das Verdrängungsvolumen, verbleibt die Druckflüssigkeit nach dem Abbau des Aufweitdruckes, d. h. also dann, wenn der Aufweitdruckerzeuger passiv geworden ist, unter einem Restdruck, der abgebaut werden muß.
A disadvantage of the known system is that at least one self-releasing check valve (check valve 19 in DE-B-26 16 523) must be provided in the connection between the hydraulic fluid filling device and the pressure build-up mandrel. This self-releasing non-return valve first has the task as a non-return valve, when, with the help of the hydraulic fluid filling device, hydraulic fluid is filled in, to enable the build-up of the expansion pressure - with the aid of the expansion pressure generator - thus to prevent the expansion pressure generator from pushing the hydraulic fluid back into the hydraulic fluid filling device. The check valve must also be self-releasing, for the following reason:
  • When the expansion pressure is built up - up to approx. 4000 bar - the hydraulic fluid is compressed; the volume of the hydraulic fluid under the expansion pressure is smaller than the volume of the relaxed hydraulic fluid by the compression volume. Now, when expanding - by expanding the pipe end of the pipe to be fastened - there is a displacement volume which is available for the hydraulic fluid when the expansion pressure is reduced. However, since the compression volume is generally greater than the displacement volume, the pressure fluid remains after the expansion pressure has been released, that is to say when the expansion pressure generator has become passive, under a residual pressure which must be released.

Nun ist es praktisch nicht möglich, ein hinreichend funktionssicheres selbstentsperrendes Rückschlagventil zu bauen, das bis zu ca. 4000 bar Aufweitdruck als Rückschlagventil absolut druckdicht ist, das bei einem Fülldruck von z. B. 400 bar noch nicht selbstentsperrend wirksam wird und das bei einem Restdruck von z. B. 300 bar sicher selbstentsperrend wirksam wird. (Liegt der Restdruck oberhalb des Fülldruckes, so kann ein selbstentsperrendes Rückschlagventil natürlich ohnehin nicht verwendet werden.) Im Ergebnis wird bei der bekannten Anlage, von der die Erfindung ausgeht, mit einem von Hand zu betätigenden Restdruckabbauventil gearbeitet, wenn wirklich sichergestellt werden soll, daß der erläuterte Restdruck tatsächlich abgebaut wird.Now it is practically not possible to build a sufficiently functional, self-releasing check valve that is absolutely pressure-tight up to approx. 4000 bar expansion pressure as a check valve, which can be operated at a filling pressure of e.g. B. 400 bar is not yet self-releasing and that at a residual pressure of z. B. 300 bar is effective self-releasing. (If the residual pressure is above the filling pressure, a self-releasing check valve can of course not be used anyway.) As a result, in the known system from which the invention is based, a manually operated residual pressure relief valve is used if it is really to be ensured that the explained residual pressure is actually reduced.

Der Erfindung liegt folglich die Aufgabe zugrunde, die in Rede stehende Anlage zum »hydraulischen Aufweiten von Rohren« so auszugestalten und weiterzubilden, daß das erläuterte selbstentsperrende Rückschlagventil und ein von Hand zu betätigendes Restdruckabbauventil nicht mehr benötigt werden.The invention is therefore based on the object of designing and developing the system in question for "hydraulic expansion of pipes" in such a way that the self-releasing check valve described and a manually operated residual pressure relief valve are no longer required.

Die erfindungsgemäße Anlage zur druckdichten Befestigung eines Rohres in einem Rohrboden mit Hilfe einer Druckflüssigkeit, bei der die zuvor dargelegte Aufgabe gelöst ist, ist dadurch gekennzeichnet, daß die Aufweitdruckdichtung in der Innenwandung des Druckzylinders angeordnet ist und der Füllanschluß - in Bewegungsrichtung des Druckkolbens gesehen - vor der Aufweitdruckdichtung in den Druckzylinder mündet.The system according to the invention for the pressure-tight fastening of a tube in a tube sheet with the aid of a hydraulic fluid, in which the above-described object is achieved, is characterized in that the expansion pressure seal is arranged in the inner wall of the pressure cylinder and the filling connection - as seen in the direction of movement of the pressure piston - before the expansion pressure seal opens into the pressure cylinder.

Erfindungsgemäß ist also der Aufweitdruckerzeuger so ausgeführt, daß er die Funktion des im Stand der Technik notwendig gewesenen selbstentsperrenden Rückschlagventils mit übernimmt. Ist der Aufweitdruckerzeuger zunächst passiv, d. h. der Druckkolben in seiner zurückgezogenen, passiven Endstellung, so kann die Druckflüssigkeit ohne weiteres von der Druckflüssigkeitsfülleinrichtung über den Aufweitdruckerzeuger an der Aufweitdruckdichtung vorbei dem Druckaufbaudorn zugeführt werden. Wird dann zum Aufbau des Aufweitdruckes der Aufweitdruckerzeuger aktiviert, so wird die Verbindung zwischen dem Füllanschluß des Aufweitdruckerzeugers und dem Druckaufbaudorn gesperrt, indem der Druckkolben vorgeschoben wird, den Füllanschluß überfährt, in die Aufweitdruckdichtung hineingleitet und den Druckaufbaudorn damit vom Füllanschluß entkoppelt, so daß der Aufweitdruckerzeuger die Druckflüssigkeit nicht in die Druckflüssigkeitsfülleinrichtung zurückdrücken kann. Wird nach dem Aufweiten der Aufweitdruckerzeuger wieder passiviert, so wird die Verbindung zwischen dem Druckaufbaudorn und dem Füllanschluß des Aufweitdrukkerzeugers wieder geöffnet, so daß sich der Restdruck in die Druckflüssigkeitsfülleinrichtung abbauen kann. Besondere Bedeutung kommt der Tatsache zu, daß die Aufweitdruckdichtung in der Innenwandung des Druckzylinders vorgesehen, also als sogenannte Stangendichtung ausgeführt ist, - während im Stand der Technik, von dem die Erfindung ausgeht, die Aufweitdruckdichtung in Außenwandung des Druckkolbens vorgesehen, also als sogenannte Kolbendichtung ausgeführt ist. Die Ausführung der Aufweitdruckdichtung des Aufweitdruckerzeugers als sogenannte Stangendichtung hat gegenüber der Ausführung als sogenannte Kolbendichtung eine Mehrzahl von Vorteilen. Insbesondere läßt sich der Druckkolben für das Zusammenwirken mit der Aufweitdruckdichtung besser bearbeiten als der Druckzylinder. Selbstverständlich muß die Aufweitdruckdichtung nicht in die Innenwandung des Druckzylinders eingelassen sein, sondern kann auch gegenüber der Innenwandung des Druckzylinders vorspringen, also gewissermaßen an der Innenwandung des Druckzylinders angeordnet sein.According to the invention, the expansion pressure generator is designed so that it also takes over the function of the self-releasing check valve that was necessary in the prior art. If the expansion pressure generator is initially passive, i. H. the pressure piston in its retracted, passive end position, the pressure fluid can easily be fed from the pressure fluid filling device via the expansion pressure generator past the expansion pressure seal to the pressure build-up mandrel. If the expansion pressure generator is then activated to build up the expansion pressure, the connection between the filling connection of the expansion pressure generator and the pressure build-up mandrel is blocked by pushing the pressure piston forward, moving the fill connection over, sliding into the expansion pressure seal and thus decoupling the pressure build-up mandrel from the filling connection, so that the expansion pressure generator the hydraulic fluid cannot push back into the hydraulic fluid filling device. If the expansion pressure generator is passivated again after the expansion, the connection between the pressure build-up mandrel and the filling connection of the expansion pressure generator is opened again, so that the residual pressure can be released into the hydraulic fluid filling device. Of particular importance is the fact that the expansion pressure seal is provided in the inner wall of the pressure cylinder, i.e. it is designed as a so-called rod seal, while in the prior art, from which the invention is based, the expansion pressure seal is provided in the outer wall of the pressure piston, i.e. it is designed as a so-called piston seal is. The design of the expansion pressure seal of the expansion pressure generator as a so-called rod seal has a number of advantages over the design as a so-called piston seal. In particular, the pressure piston for interacting with the expansion pressure seal can be machined better than the pressure cylinder. Of course, the expansion pressure seal does not have to be embedded in the inner wall of the printing cylinder, but can also project over the inner wall of the printing cylinder, that is to say it can be arranged on the inner wall of the printing cylinder.

Zur Lehre der Erfindung empfiehlt es sich, den Aufweitdruckerzeuger - in Bewegungsrichtung des Druckkolbens gesehen - vor dem Füllanschluß mit einer Fülldruckdichtung zu versehen. Bei dieser Ausführungsform befindet sich also an dem Aufweitdruckerzeuger der Füllanschluß zwischen der Aufweitdruckdichtung und der Fülldruckdichtung.To teach the invention, it is advisable to provide the expansion pressure generator with a filling pressure seal before the filling connection, as seen in the direction of movement of the pressure piston. In this embodiment, therefore, the filling connection between the expanding pressure seal and the filling pressure seal is located on the expanding pressure generator.

Bei der erfindungsgemäßen Anlage zum »hydraulischen Aufweiten von Rohren« wird der Druckkolben des Aufweitdruckerzeugers in der Regel durch den erläuterten Restdruck der Druckflüssigkeit in eine passive Endstellung gebracht. Gleichwohl kann es sich empfehlen, den Aufweitdruckerzeuger mit einer eine passive Endstellung des Druckkolbens sicherstellenden Druckfeder zu versehen. Dadurch wird verhindert, daß die Verbindung zwischen dem Füllanschluß des Aufweitdruckerzeugers und dem Druckaufbaudorn durch den Druckkolben des Aufweitdruckerzeugers teilgeöffnet bzw. teilgesperrt ist, wenn der Aufweitdruckerzeuger passiv ist.In the system according to the invention for "hydraulic expansion of pipes", the pressure piston of the expansion pressure generator is generally brought into a passive end position by the explained residual pressure of the pressure fluid. Nevertheless, it may be advisable to provide the expansion pressure generator with a compression spring which ensures a passive end position of the pressure piston. This prevents the connection between the filling connection of the expansion pressure generator and the pressure build-up mandrel from being partially opened or partially blocked by the pressure piston of the expansion pressure generator when the expansion pressure generator is passive.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung erläutert; es zeigt

  • Fig. 1 eine schematische Darstellung einer bevorzugten Ausführungsform einer Anlage zum hydraulischen Aufweiten von Rohren und
  • Fig. 2 in gegenüber der Fig. 1 wesentlich größerer Darstellung, den Aufweitdruckerzeuger der Anlage nach Fig. 1, teilweise im Schnitt.
In the following the invention will be explained with reference to a drawing showing only one embodiment; it shows
  • Fig. 1 is a schematic representation of a preferred embodiment of a system for the hydraulic expansion of pipes and
  • Fig. 2 in comparison with Fig. 1 much larger representation, the expansion pressure generator of the system of Fig. 1, partly in section.

Die Fig. 1 zeigt eine Anlage zur druckdichten Befestigung eines nicht dargestellten Rohres in einem nicht dargestellten Rohrboden mit Hilfe einer Druckflüssigkeit, mit einem Druckaufbaudorn 1, einer Druckflüssigkeitsfülleinrichtung 2 und einem Aufweitdruckerzeuger 3. Die Druckflüssigkeitsfülleinrichtung 2 und der Aufweitdruckerzeuger 3 sind mit dem Druckaufbaudorn 1 verbunden. Als Druckflüssigkeit wird Wasser verwendet, während die Druckflüssigkeitsfülleinrichtung 2 und der Aufweitdruckerzeuger 3 mit von einer Pumpe gefördertem Öl als Antriebsmittel arbeiten; ein zu der Druckflüssigkeitsfülleinrichtung 2 gehörender Fülldruckerzeuger 5 und der Aufweitdruckerzeuger 3 weisen jeweils einen Doppelkolben 6, 7 mit jeweils einem die Druckflüssigkeit, also das Wasser beaufschlagenden Druckkolben 8, 9 und jeweils einen ölbeaufschlagten Antriebskolben 10, 11 auf. Im übrigen zeigt die Fig. 1 eine Mehrzahl von Verbindungs-, Meß- und Steuermitteln auf, die hier der Beschreibung nicht bedürfen.1 shows a system for the pressure-tight fastening of a tube, not shown, in a tube sheet, not shown, with the aid of a hydraulic fluid, with a pressure build-up mandrel 1, a hydraulic fluid filling device 2 and an expansion pressure generator 3. The hydraulic fluid filling device 2 and the expansion pressure generator 3 are connected to the pressure expansion mandrel 1 . Water is used as the pressure fluid, while the pressure fluid filling device 2 and the expansion pressure generator 3 operate with oil conveyed by a pump as the drive means; a filling pressure generator 5 belonging to the hydraulic fluid filling device 2 and the expansion pressure generator 3 each have a double piston 6, 7, each with a pressure piston 8, 9 which pressurizes the hydraulic fluid, that is to say the water, and in each case an oil-loaded drive piston 10, 11. 1 shows a plurality of connecting, measuring and control means, which do not need to be described here.

Wie die Figuren zeigen, weist der Aufweitdruckerzeuger 3 einen Druckzylinder 12, den Doppelkolben 7 mit dem Druckkolben 9 und eine Aufweitdruckdichtung 13 auf, die zwischen dem Druckzylinder 12 und dem Druckkolben 9 wirksam ist. Dabei ist die Druckflüssigkeitsfülleinrichtung 2 über den Aufweitdruckerzeuger 3 mit dem Druckaufbaudorn 1 verbunden, weist also der Aufweitdruckerzeuger 3 einen Füllanschluß 14 auf, und ist die Verbindung zwischen dem Füllanschluß 14 des Aufweitdruckerzeugers 3 und dem Druckaufbaudorn 1 geöffnet, wenn der Aufweitdruckerzeuger 3 passiv ist, dagegen gesperrt, wenn der Aufweitdruckerzeuger 3 aktiv ist.As the figures show, the expansion pressure generator 3 has a pressure cylinder 12, the double piston 7 with the pressure piston 9 and an expansion pressure seal 13, which is effective between the pressure cylinder 12 and the pressure piston 9. The pressure fluid filling device 2 is connected to the pressure build-up mandrel 1 via the expansion pressure generator 3, that is to say the expansion pressure generator 3 has a filling connection 14, and the connection between the filling connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is opened, on the other hand, when the expansion pressure generator 3 is passive locked when the expansion pressure generator 3 is active.

Nun ist der Aufweitdruckerzeuger 3 so ausgeführt, daß er, wenn er gleichsam zwischen der Druckflüssigkeitsfülleinrichtung 2 und dem Druckaufbaudorn 1 vorgesehen ist, die Funktion des im Stand der Technik notwendig gewesenen selbstentsperrenden Rückschlagventils mit übernimmt. Ist der Aufweitdruckerzeuger 3 zunächst passiv, so kann die Druckflüssigkeit ohne weiteres von der Druckflüssigkeitsfülleinrichtung 2 über den Aufweitdruckerzeuger 3 dem Druckaufbaudorn 1 zugeführt werden, weil ja dann die Verbindung zwischen dem Füllanschluß 14 des Aufweitdruckerzeugers 3 und dem Druckaufbaudorn 1 geöffnet ist. Wird dann - zum Aufbau des Aufweitdruckes - der Aufweitdruckerzeuger aktiviert, so wird die Verbindung zwischen dem Füllanschluß 14 des Aufweitdruckerzeugers 3 und dem Druckaufbaudorn 1 gesperrt, so daß der Aufweitdruckerzeuger 3 die Druckflüssigkeit nicht in die Druckflüssigkeitsfüllung 2 zurückdrücken kann. Wird dann nach dem Aufweiten der Aufweitdruckerzeuger 3 wieder passiviert, so wird die Verbindung zwischen dem Füllanschluß 14 des Aufweitdruckerzeugers 3 und dem Druckaufbaudorn 1 wieder geöffnet, so daß sich der Restdruck in die Druckflüssigkeitsfülleinrichtung 2 abbauen kann.Now the expansion pressure generator 3 is designed so that when it, as it were between the Hydraulic fluid filling device 2 and the pressure build-up mandrel 1 is provided, which also takes over the function of the self-releasing check valve that was necessary in the prior art. If the expansion pressure generator 3 is initially passive, the pressure fluid can be fed from the pressure fluid filling device 2 via the expansion pressure generator 3 to the pressure build-up mandrel 1, because the connection between the filler connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is then opened. Then - to build up the expansion pressure - the expansion pressure generator is activated, the connection between the filling connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is blocked, so that the expansion pressure generator 3 cannot press the hydraulic fluid back into the hydraulic fluid filling 2. If the expansion pressure generator 3 is then passivated again after expansion, the connection between the filling connection 14 of the expansion pressure generator 3 and the pressure build-up mandrel 1 is opened again, so that the residual pressure in the hydraulic fluid filling device 2 can be reduced.

Im dargestellten Ausführungsbeispiel ist bei dem Aufweitdruckerzeuger 3 der Füllanschluß 14 - in Bewegungsrichtung des Druckkolbens 9 gesehen - vor der Aufweitdruckdichtung 13 vorgesehen und weist der Aufweitdruckerzeuger 3 - in Bewegungsrichtung des Druckkolbens 9 gesehen - vor dem Füllanschluß 14 eine Fülldruckdichtung 15 auf; der Füllanschluß 14 befindet sich also zwischen der Aufweitdruckdichtung 13 und der Fülldruckdichtung 15. Im übrigen weist der Aufweitdruckerzeuger 3 noch eine eine passive Endstellung des Druckkolbens 9 sicherstellende Druckfeder 16 auf und ist die Aufweitdruckdichtung 13 in der Innenwandung des Druckzylinders 9 vorgesehen, also als sogenannte Stangendichtung ausgeführt.In the exemplary embodiment shown, the filling connection 14 - seen in the direction of movement of the pressure piston 9 - is provided in the expansion pressure generator 3 in front of the expansion pressure seal 13 and the expansion pressure generator 3 - viewed in the direction of movement of the pressure piston 9 - has a filling pressure seal 15 in front of the filling connection 14; the filling connection 14 is thus between the expanding pressure seal 13 and the filling pressure seal 15. Otherwise, the expanding pressure generator 3 also has a passive end position of the pressure piston 9, pressure spring 16 and the expanding pressure seal 13 is provided in the inner wall of the pressure cylinder 9, that is to say as a so-called rod seal executed.

Claims (3)

1. An installation for the pressure-tight mounting of a tube in a tube plate by means of a fluid und pressure, with a pressure-developing mandrel (1), a pressure-fluid filler equipment (2) and an expansion pressure producer (3), in which the expansion pressure producer (3) is connected directly and the pressure-fluid filler equipment (2) is connected via the expansion pressure producer (3) to the pressure-developing mandrel (1), in which the expansion pressure producer (3) consists of a pressure cylinder (12), a pressure piston (9), an expansion pressure seal (13) and a filling connection (14) opening out into the pressure cylinder (12) for the pressure-fluid filler equipment (2), and in which the connection between the filling connection (14), the expansion pressure producer (3), and the pressure-developing mandrel (1) is opened when the expansion pressure producer (3) is inactive and closed, and is closed when the expansion pressure producer (3) is active, characterized in that the expansion pressure seal (13) is located in the inner wall of the pressure cylinder (12) and the filling connection (14) - as seen in the direction of movement of the pressure piston (9) - opens out into the pressure cylinder (12) before the expansion pressure seal (13).
2. An installation according to Claim 1, characterized in that the expansion pressure producer (3) possesses a filling pressure seal (15) before the filling connection (14) - as been in the direction of movement of the pressure piston (9).
3. An installation according to Claim 1 or 2, characterized in that the expansion pressure producer (3) possesses a compression spring (3) ensuring an inactive end position of the pressure piston (9).
EP82100962A 1981-02-17 1982-02-10 Arrangement for pressure-sealed installation of a tube in a tube sheet by means of a pressurized fluid Expired EP0058385B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100962T ATE13823T1 (en) 1981-02-17 1982-02-10 SYSTEM FOR THE PRESSURE-TIGHT FASTENING OF A TUBE IN A TUBE SHEET WITH THE AID OF A PRESSURE LIQUID.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3105735A DE3105735C2 (en) 1981-02-17 1981-02-17 System for pressure-tight fastening of a pipe in a pipe sheet with the aid of a hydraulic fluid
DE3105735 1981-02-17

Publications (2)

Publication Number Publication Date
EP0058385A1 EP0058385A1 (en) 1982-08-25
EP0058385B1 true EP0058385B1 (en) 1985-06-19

Family

ID=6125060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100962A Expired EP0058385B1 (en) 1981-02-17 1982-02-10 Arrangement for pressure-sealed installation of a tube in a tube sheet by means of a pressurized fluid

Country Status (16)

Country Link
US (1) US4485547A (en)
EP (1) EP0058385B1 (en)
JP (1) JPS57152334A (en)
AR (1) AR228637A1 (en)
AT (1) ATE13823T1 (en)
AU (1) AU548570B2 (en)
BR (1) BR8200819A (en)
CA (1) CA1174573A (en)
CS (1) CS235531B2 (en)
DD (1) DD201979A5 (en)
DE (1) DE3105735C2 (en)
ES (1) ES8301694A1 (en)
PL (1) PL137800B1 (en)
RO (1) RO83450B (en)
YU (1) YU33182A (en)
ZA (1) ZA82754B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470280A (en) * 1983-05-16 1984-09-11 Haskel, Inc. Swaging apparatus with timed pre-fill
DE3611108C1 (en) * 1986-04-03 1987-07-30 Balcke Duerr Ag Method and device for pressure-tight fastening of straight pipes between two pipe disks
US4892149A (en) * 1987-04-30 1990-01-09 Cameron Iron Works Usa, Inc. Method of securing a tubular member within an annular well member, the combined well structure and the tool
DE4103081A1 (en) * 1991-02-01 1992-08-06 Eichelberg & Co Gmbh H D METHOD FOR THE HYDROSTATIC FORMING OF HOLLOW BODIES FROM COLD FORMABLE METAL AND DEVICE FOR IMPLEMENTING THE METHOD
DE4103082A1 (en) * 1991-02-01 1992-08-27 Eichelberg & Co Gmbh H D METHOD FOR THE HYDROSTATIC FORMING OF HOLLOW BODIES FROM COLD FORMABLE METAL AND DEVICE FOR IMPLEMENTING THE METHOD
DE4103079A1 (en) * 1991-02-01 1992-08-27 Eichelberg & Co Gmbh H D DEVICE FOR THE HYDROSTATIC FORMING OF HOLLOW BODIES MADE OF COLD-FORMING METAL
ATE389478T1 (en) * 2004-06-03 2008-04-15 Balcke Duerr Gmbh HYDRAULIC EXPANSION METHOD AND DEVICE THEREOF
US9303924B1 (en) 2014-10-14 2016-04-05 Neptune-Benson, Llc Multi-segmented tube sheet
US9149742B1 (en) 2014-10-14 2015-10-06 Neptune-Benson, Llc Multi-segmented tube sheet
US9581395B2 (en) 2014-10-14 2017-02-28 Neptune-Benson, Llc Multi-segmented tube sheet
US9302205B1 (en) 2014-10-14 2016-04-05 Neptune-Benson, Llc Multi-segmented tube sheet
CN109396538A (en) * 2018-11-15 2019-03-01 长沙思胜智能设备有限公司 Horizontal broaching machine and its slide unit hydraulic system
US11338353B2 (en) 2020-08-11 2022-05-24 Rheem Manufacturing Company Systems and methods for heat exchanger manufacturing

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638748A (en) * 1948-08-13 1953-05-19 Scott Aviation Corp Master cylinder with fluid-volume compensating valve in piston
US2847827A (en) * 1954-09-13 1958-08-19 Thew Shovel Co Hydraulic compensating master cylinder
DE1939105A1 (en) * 1968-08-13 1970-02-19 High Pressure Components Ltd Lateral broadening of pipes
AT349856B (en) * 1976-04-14 1979-04-25 Balcke Duerr Ag DEVICE FOR EXPANDING PIPE END WITHIN A PIPE DISC
DE2622753C3 (en) * 1976-05-21 1980-03-20 Balcke-Duerr Ag, 4030 Ratingen Device for pressure-tight fastening of pipes in the bores of pipe disks
DE2638949C3 (en) * 1976-08-28 1981-04-02 Robert Bosch Gmbh, 7000 Stuttgart Method for molding studs on a circuit board
US4211151A (en) * 1977-05-26 1980-07-08 United Technologies Corporation Jam proof piston
JPS5913290B2 (en) * 1977-06-16 1984-03-28 株式会社スギノマシン Hydraulic pipe expansion device
US4161187A (en) * 1978-01-03 1979-07-17 Bauer David N Erosion resistant control valve
JPS54109063A (en) * 1978-02-14 1979-08-27 Sugino Mach Liquid pressure pipe expanding device equipped with automatic safety valve for liquid pressure
JPS54124866A (en) * 1978-03-22 1979-09-28 Babcock Hitachi Kk Hydraulic pipe expander

Also Published As

Publication number Publication date
PL235098A1 (en) 1982-09-13
DD201979A5 (en) 1983-08-24
DE3105735C2 (en) 1983-05-26
ES509639A0 (en) 1983-01-16
PL137800B1 (en) 1986-07-31
AR228637A1 (en) 1983-03-30
YU33182A (en) 1985-03-20
CS235531B2 (en) 1985-05-15
EP0058385A1 (en) 1982-08-25
ATE13823T1 (en) 1985-07-15
JPS57152334A (en) 1982-09-20
RO83450B (en) 1984-02-28
DE3105735A1 (en) 1982-08-26
ZA82754B (en) 1982-12-29
AU8052582A (en) 1982-08-26
ES8301694A1 (en) 1983-01-16
AU548570B2 (en) 1985-12-19
CA1174573A (en) 1984-09-18
US4485547A (en) 1984-12-04
RO83450A (en) 1984-02-21
BR8200819A (en) 1982-12-28

Similar Documents

Publication Publication Date Title
EP0058385B1 (en) Arrangement for pressure-sealed installation of a tube in a tube sheet by means of a pressurized fluid
DE102013111616B4 (en) Changeover valve and internal combustion engine with such a changeover valve
DE3828699A1 (en) METHOD FOR FILLING OIL OF A HYDRO-PNEUMATIC PRESSURE TRANSLATOR AND DEVICE FOR IMPLEMENTING THE METHOD
DE60005303T2 (en) DEVICE FOR REDUCING THE REBOUND WITH BRAKE, BRAKE COMPENSATOR AND PIPE PREPARATOR
DE2515108C3 (en) Device for the advance of a mining machine for underground mining
DE102006039731B4 (en) Chain tensioner
DE102013105391B4 (en) Changeover valve and internal combustion engine with such a changeover valve
DE2642932B2 (en) Sealing of the piston rod of a spring and damping device
DE2920423A1 (en) COMPRESSED AIR CYLINDER WITH LOCKING DEVICE
EP1285834A2 (en) Control device for compressed-air brakes
DE3221984C2 (en)
DE102018115249A1 (en) Quick changer and quick change device with a quick changer
DE3540266C1 (en) Overload protection
DE2508268C3 (en) Control piston for hydraulic pressure medium sequence controls, in particular for a steering valve of a power steering device of vehicles
DE202021105127U1 (en) Multi-stage lockable actuator
DE10216692B3 (en) Actuator for an electro-hydraulic brake system of a motor vehicle
DE2649524A1 (en) TELESCOPIC DEVICE
DE2605648C2 (en) Pneumatic-hydraulic blind riveting device
DE102017122889A1 (en) Quick coupler
DE1777209A1 (en) Device for high-performance forming of workpieces, in particular made of sheet metal, with the aid of shock agents
EP4051911B1 (en) Electrohydraulic system for a valve
EP3540242B1 (en) Hydraulically damped actuator
DE102006002566A1 (en) hydraulic system
DE1240752B (en) Rack and pinion steering with manual assistance
DE430780C (en) Control for switching devices moved by pressure medium on boiler feed water preheaters, especially for locomotives

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT LU NL SE

17P Request for examination filed

Effective date: 19830219

ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH FR GB IT LI LU NL SE

REF Corresponds to:

Ref document number: 13823

Country of ref document: AT

Date of ref document: 19850715

Kind code of ref document: T

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19860207

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19860228

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19860228

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19860404

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19870210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19870211

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19870228

Ref country code: CH

Effective date: 19870228

BERE Be: lapsed

Owner name: BUSSE WILFRIED

Effective date: 19870228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19870901

GBPC Gb: european patent ceased through non-payment of renewal fee
NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19871030

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881121

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890228

EUG Se: european patent has lapsed

Ref document number: 82100962.8

Effective date: 19880215